138c8a9a5SSteve French // SPDX-License-Identifier: LGPL-2.1 238c8a9a5SSteve French /* 338c8a9a5SSteve French * 438c8a9a5SSteve French * Copyright (C) International Business Machines Corp., 2009, 2013 538c8a9a5SSteve French * Etersoft, 2012 638c8a9a5SSteve French * Author(s): Steve French (sfrench@us.ibm.com) 738c8a9a5SSteve French * Pavel Shilovsky (pshilovsky@samba.org) 2012 838c8a9a5SSteve French * 938c8a9a5SSteve French * Contains the routines for constructing the SMB2 PDUs themselves 1038c8a9a5SSteve French * 1138c8a9a5SSteve French */ 1238c8a9a5SSteve French 1338c8a9a5SSteve French /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */ 1438c8a9a5SSteve French /* Note that there are handle based routines which must be */ 1538c8a9a5SSteve French /* treated slightly differently for reconnection purposes since we never */ 1638c8a9a5SSteve French /* want to reuse a stale file handle and only the caller knows the file info */ 1738c8a9a5SSteve French 1838c8a9a5SSteve French #include <linux/fs.h> 1938c8a9a5SSteve French #include <linux/kernel.h> 2038c8a9a5SSteve French #include <linux/vfs.h> 2138c8a9a5SSteve French #include <linux/task_io_accounting_ops.h> 2238c8a9a5SSteve French #include <linux/uaccess.h> 2338c8a9a5SSteve French #include <linux/uuid.h> 2438c8a9a5SSteve French #include <linux/pagemap.h> 2538c8a9a5SSteve French #include <linux/xattr.h> 2638c8a9a5SSteve French #include "cifsglob.h" 2738c8a9a5SSteve French #include "cifsacl.h" 2838c8a9a5SSteve French #include "cifsproto.h" 2938c8a9a5SSteve French #include "smb2proto.h" 3038c8a9a5SSteve French #include "cifs_unicode.h" 3138c8a9a5SSteve French #include "cifs_debug.h" 3238c8a9a5SSteve French #include "ntlmssp.h" 3338c8a9a5SSteve French #include "smb2status.h" 3438c8a9a5SSteve French #include "smb2glob.h" 3538c8a9a5SSteve French #include "cifspdu.h" 3638c8a9a5SSteve French #include "cifs_spnego.h" 3738c8a9a5SSteve French #include "smbdirect.h" 3838c8a9a5SSteve French #include "trace.h" 3938c8a9a5SSteve French #ifdef CONFIG_CIFS_DFS_UPCALL 4038c8a9a5SSteve French #include "dfs_cache.h" 4138c8a9a5SSteve French #endif 4238c8a9a5SSteve French #include "cached_dir.h" 4338c8a9a5SSteve French 4438c8a9a5SSteve French /* 4538c8a9a5SSteve French * The following table defines the expected "StructureSize" of SMB2 requests 4638c8a9a5SSteve French * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests. 4738c8a9a5SSteve French * 4838c8a9a5SSteve French * Note that commands are defined in smb2pdu.h in le16 but the array below is 4938c8a9a5SSteve French * indexed by command in host byte order. 5038c8a9a5SSteve French */ 5138c8a9a5SSteve French static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = { 5238c8a9a5SSteve French /* SMB2_NEGOTIATE */ 36, 5338c8a9a5SSteve French /* SMB2_SESSION_SETUP */ 25, 5438c8a9a5SSteve French /* SMB2_LOGOFF */ 4, 5538c8a9a5SSteve French /* SMB2_TREE_CONNECT */ 9, 5638c8a9a5SSteve French /* SMB2_TREE_DISCONNECT */ 4, 5738c8a9a5SSteve French /* SMB2_CREATE */ 57, 5838c8a9a5SSteve French /* SMB2_CLOSE */ 24, 5938c8a9a5SSteve French /* SMB2_FLUSH */ 24, 6038c8a9a5SSteve French /* SMB2_READ */ 49, 6138c8a9a5SSteve French /* SMB2_WRITE */ 49, 6238c8a9a5SSteve French /* SMB2_LOCK */ 48, 6338c8a9a5SSteve French /* SMB2_IOCTL */ 57, 6438c8a9a5SSteve French /* SMB2_CANCEL */ 4, 6538c8a9a5SSteve French /* SMB2_ECHO */ 4, 6638c8a9a5SSteve French /* SMB2_QUERY_DIRECTORY */ 33, 6738c8a9a5SSteve French /* SMB2_CHANGE_NOTIFY */ 32, 6838c8a9a5SSteve French /* SMB2_QUERY_INFO */ 41, 6938c8a9a5SSteve French /* SMB2_SET_INFO */ 33, 7038c8a9a5SSteve French /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */ 7138c8a9a5SSteve French }; 7238c8a9a5SSteve French 7338c8a9a5SSteve French int smb3_encryption_required(const struct cifs_tcon *tcon) 7438c8a9a5SSteve French { 7538c8a9a5SSteve French if (!tcon || !tcon->ses) 7638c8a9a5SSteve French return 0; 7738c8a9a5SSteve French if ((tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) || 7838c8a9a5SSteve French (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA)) 7938c8a9a5SSteve French return 1; 8038c8a9a5SSteve French if (tcon->seal && 8138c8a9a5SSteve French (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION)) 8238c8a9a5SSteve French return 1; 8338c8a9a5SSteve French return 0; 8438c8a9a5SSteve French } 8538c8a9a5SSteve French 8638c8a9a5SSteve French static void 8738c8a9a5SSteve French smb2_hdr_assemble(struct smb2_hdr *shdr, __le16 smb2_cmd, 8838c8a9a5SSteve French const struct cifs_tcon *tcon, 8938c8a9a5SSteve French struct TCP_Server_Info *server) 9038c8a9a5SSteve French { 9109ee7a3bSSteve French struct smb3_hdr_req *smb3_hdr; 922c75426cSSteve French 9338c8a9a5SSteve French shdr->ProtocolId = SMB2_PROTO_NUMBER; 9438c8a9a5SSteve French shdr->StructureSize = cpu_to_le16(64); 9538c8a9a5SSteve French shdr->Command = smb2_cmd; 9605d0f8f5SSteve French 9705d0f8f5SSteve French if (server) { 9809ee7a3bSSteve French /* After reconnect SMB3 must set ChannelSequence on subsequent reqs */ 9905d0f8f5SSteve French if (server->dialect >= SMB30_PROT_ID) { 10009ee7a3bSSteve French smb3_hdr = (struct smb3_hdr_req *)shdr; 10105d0f8f5SSteve French /* 10205d0f8f5SSteve French * if primary channel is not set yet, use default 10305d0f8f5SSteve French * channel for chan sequence num 10405d0f8f5SSteve French */ 105b3773b19SSteve French if (SERVER_IS_CHAN(server)) 10609ee7a3bSSteve French smb3_hdr->ChannelSequence = 10709ee7a3bSSteve French cpu_to_le16(server->primary_server->channel_sequence_num); 10809ee7a3bSSteve French else 10905d0f8f5SSteve French smb3_hdr->ChannelSequence = 11005d0f8f5SSteve French cpu_to_le16(server->channel_sequence_num); 11109ee7a3bSSteve French } 11238c8a9a5SSteve French spin_lock(&server->req_lock); 11338c8a9a5SSteve French /* Request up to 10 credits but don't go over the limit. */ 11438c8a9a5SSteve French if (server->credits >= server->max_credits) 11538c8a9a5SSteve French shdr->CreditRequest = cpu_to_le16(0); 11638c8a9a5SSteve French else 11738c8a9a5SSteve French shdr->CreditRequest = cpu_to_le16( 11838c8a9a5SSteve French min_t(int, server->max_credits - 11938c8a9a5SSteve French server->credits, 10)); 12038c8a9a5SSteve French spin_unlock(&server->req_lock); 12138c8a9a5SSteve French } else { 12238c8a9a5SSteve French shdr->CreditRequest = cpu_to_le16(2); 12338c8a9a5SSteve French } 12438c8a9a5SSteve French shdr->Id.SyncId.ProcessId = cpu_to_le32((__u16)current->tgid); 12538c8a9a5SSteve French 12638c8a9a5SSteve French if (!tcon) 12738c8a9a5SSteve French goto out; 12838c8a9a5SSteve French 12938c8a9a5SSteve French /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */ 13038c8a9a5SSteve French /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */ 13138c8a9a5SSteve French if (server && (server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 13238c8a9a5SSteve French shdr->CreditCharge = cpu_to_le16(1); 13338c8a9a5SSteve French /* else CreditCharge MBZ */ 13438c8a9a5SSteve French 13538c8a9a5SSteve French shdr->Id.SyncId.TreeId = cpu_to_le32(tcon->tid); 13638c8a9a5SSteve French /* Uid is not converted */ 13738c8a9a5SSteve French if (tcon->ses) 13838c8a9a5SSteve French shdr->SessionId = cpu_to_le64(tcon->ses->Suid); 13938c8a9a5SSteve French 14038c8a9a5SSteve French /* 14138c8a9a5SSteve French * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have 14238c8a9a5SSteve French * to pass the path on the Open SMB prefixed by \\server\share. 14338c8a9a5SSteve French * Not sure when we would need to do the augmented path (if ever) and 14438c8a9a5SSteve French * setting this flag breaks the SMB2 open operation since it is 14538c8a9a5SSteve French * illegal to send an empty path name (without \\server\share prefix) 14638c8a9a5SSteve French * when the DFS flag is set in the SMB open header. We could 14738c8a9a5SSteve French * consider setting the flag on all operations other than open 14838c8a9a5SSteve French * but it is safer to net set it for now. 14938c8a9a5SSteve French */ 15038c8a9a5SSteve French /* if (tcon->share_flags & SHI1005_FLAGS_DFS) 15138c8a9a5SSteve French shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */ 15238c8a9a5SSteve French 15338c8a9a5SSteve French if (server && server->sign && !smb3_encryption_required(tcon)) 15438c8a9a5SSteve French shdr->Flags |= SMB2_FLAGS_SIGNED; 15538c8a9a5SSteve French out: 15638c8a9a5SSteve French return; 15738c8a9a5SSteve French } 15838c8a9a5SSteve French 15950e8363eSShyam Prasad N /* helper function for code reuse */ 16050e8363eSShyam Prasad N static int 16150e8363eSShyam Prasad N cifs_chan_skip_or_disable(struct cifs_ses *ses, 16250e8363eSShyam Prasad N struct TCP_Server_Info *server, 16350e8363eSShyam Prasad N bool from_reconnect) 16450e8363eSShyam Prasad N { 16550e8363eSShyam Prasad N struct TCP_Server_Info *pserver; 16650e8363eSShyam Prasad N unsigned int chan_index; 16750e8363eSShyam Prasad N 16850e8363eSShyam Prasad N if (SERVER_IS_CHAN(server)) { 16950e8363eSShyam Prasad N cifs_dbg(VFS, 17050e8363eSShyam Prasad N "server %s does not support multichannel anymore. Skip secondary channel\n", 17150e8363eSShyam Prasad N ses->server->hostname); 17250e8363eSShyam Prasad N 17350e8363eSShyam Prasad N spin_lock(&ses->chan_lock); 17450e8363eSShyam Prasad N chan_index = cifs_ses_get_chan_index(ses, server); 17550e8363eSShyam Prasad N if (chan_index == CIFS_INVAL_CHAN_INDEX) { 17650e8363eSShyam Prasad N spin_unlock(&ses->chan_lock); 17750e8363eSShyam Prasad N goto skip_terminate; 17850e8363eSShyam Prasad N } 17950e8363eSShyam Prasad N 18050e8363eSShyam Prasad N ses->chans[chan_index].server = NULL; 18150e8363eSShyam Prasad N spin_unlock(&ses->chan_lock); 18250e8363eSShyam Prasad N 18350e8363eSShyam Prasad N /* 18450e8363eSShyam Prasad N * the above reference of server by channel 18550e8363eSShyam Prasad N * needs to be dropped without holding chan_lock 18650e8363eSShyam Prasad N * as cifs_put_tcp_session takes a higher lock 18750e8363eSShyam Prasad N * i.e. cifs_tcp_ses_lock 18850e8363eSShyam Prasad N */ 18950e8363eSShyam Prasad N cifs_put_tcp_session(server, from_reconnect); 19050e8363eSShyam Prasad N 19150e8363eSShyam Prasad N server->terminate = true; 19250e8363eSShyam Prasad N cifs_signal_cifsd_for_reconnect(server, false); 19350e8363eSShyam Prasad N 19450e8363eSShyam Prasad N /* mark primary server as needing reconnect */ 19550e8363eSShyam Prasad N pserver = server->primary_server; 19650e8363eSShyam Prasad N cifs_signal_cifsd_for_reconnect(pserver, false); 19750e8363eSShyam Prasad N skip_terminate: 19850e8363eSShyam Prasad N return -EHOSTDOWN; 19950e8363eSShyam Prasad N } 20050e8363eSShyam Prasad N 20150e8363eSShyam Prasad N cifs_server_dbg(VFS, 20250e8363eSShyam Prasad N "server does not support multichannel anymore. Disable all other channels\n"); 20350e8363eSShyam Prasad N cifs_disable_secondary_channels(ses); 20450e8363eSShyam Prasad N 20550e8363eSShyam Prasad N 20650e8363eSShyam Prasad N return 0; 20750e8363eSShyam Prasad N } 20850e8363eSShyam Prasad N 20938c8a9a5SSteve French static int 21038c8a9a5SSteve French smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon, 21107e86408SShyam Prasad N struct TCP_Server_Info *server, bool from_reconnect) 21238c8a9a5SSteve French { 21338c8a9a5SSteve French int rc = 0; 21438c8a9a5SSteve French struct nls_table *nls_codepage = NULL; 21538c8a9a5SSteve French struct cifs_ses *ses; 2165075e9f4SShyam Prasad N int xid; 21738c8a9a5SSteve French 21838c8a9a5SSteve French /* 21938c8a9a5SSteve French * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so 22038c8a9a5SSteve French * check for tcp and smb session status done differently 22138c8a9a5SSteve French * for those three - in the calling routine. 22238c8a9a5SSteve French */ 22338c8a9a5SSteve French if (tcon == NULL) 22438c8a9a5SSteve French return 0; 22538c8a9a5SSteve French 22638c8a9a5SSteve French /* 22738c8a9a5SSteve French * Need to also skip SMB2_IOCTL because it is used for checking nested dfs links in 22838c8a9a5SSteve French * cifs_tree_connect(). 22938c8a9a5SSteve French */ 23038c8a9a5SSteve French if (smb2_command == SMB2_TREE_CONNECT || smb2_command == SMB2_IOCTL) 23138c8a9a5SSteve French return 0; 23238c8a9a5SSteve French 23338c8a9a5SSteve French spin_lock(&tcon->tc_lock); 23438c8a9a5SSteve French if (tcon->status == TID_EXITING) { 23538c8a9a5SSteve French /* 23638c8a9a5SSteve French * only tree disconnect allowed when disconnecting ... 23738c8a9a5SSteve French */ 23838c8a9a5SSteve French if (smb2_command != SMB2_TREE_DISCONNECT) { 23938c8a9a5SSteve French spin_unlock(&tcon->tc_lock); 24038c8a9a5SSteve French cifs_dbg(FYI, "can not send cmd %d while umounting\n", 24138c8a9a5SSteve French smb2_command); 24238c8a9a5SSteve French return -ENODEV; 24338c8a9a5SSteve French } 24438c8a9a5SSteve French } 24538c8a9a5SSteve French spin_unlock(&tcon->tc_lock); 24638c8a9a5SSteve French 24738c8a9a5SSteve French ses = tcon->ses; 24838c8a9a5SSteve French if (!ses) 24938c8a9a5SSteve French return -EIO; 25038c8a9a5SSteve French spin_lock(&ses->ses_lock); 25138c8a9a5SSteve French if (ses->ses_status == SES_EXITING) { 25238c8a9a5SSteve French spin_unlock(&ses->ses_lock); 25338c8a9a5SSteve French return -EIO; 25438c8a9a5SSteve French } 25538c8a9a5SSteve French spin_unlock(&ses->ses_lock); 25638c8a9a5SSteve French if (!ses->server || !server) 25738c8a9a5SSteve French return -EIO; 25838c8a9a5SSteve French 25938c8a9a5SSteve French spin_lock(&server->srv_lock); 26038c8a9a5SSteve French if (server->tcpStatus == CifsNeedReconnect) { 26138c8a9a5SSteve French /* 26238c8a9a5SSteve French * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE 26338c8a9a5SSteve French * here since they are implicitly done when session drops. 26438c8a9a5SSteve French */ 26538c8a9a5SSteve French switch (smb2_command) { 26638c8a9a5SSteve French /* 26738c8a9a5SSteve French * BB Should we keep oplock break and add flush to exceptions? 26838c8a9a5SSteve French */ 26938c8a9a5SSteve French case SMB2_TREE_DISCONNECT: 27038c8a9a5SSteve French case SMB2_CANCEL: 27138c8a9a5SSteve French case SMB2_CLOSE: 27238c8a9a5SSteve French case SMB2_OPLOCK_BREAK: 27338c8a9a5SSteve French spin_unlock(&server->srv_lock); 27438c8a9a5SSteve French return -EAGAIN; 27538c8a9a5SSteve French } 27638c8a9a5SSteve French } 2773e161536SShyam Prasad N 2783e161536SShyam Prasad N /* if server is marked for termination, cifsd will cleanup */ 2793e161536SShyam Prasad N if (server->terminate) { 2803e161536SShyam Prasad N spin_unlock(&server->srv_lock); 2813e161536SShyam Prasad N return -EHOSTDOWN; 2823e161536SShyam Prasad N } 28338c8a9a5SSteve French spin_unlock(&server->srv_lock); 28438c8a9a5SSteve French 28538c8a9a5SSteve French again: 28638c8a9a5SSteve French rc = cifs_wait_for_server_reconnect(server, tcon->retry); 28738c8a9a5SSteve French if (rc) 28838c8a9a5SSteve French return rc; 28938c8a9a5SSteve French 29038c8a9a5SSteve French spin_lock(&ses->chan_lock); 29138c8a9a5SSteve French if (!cifs_chan_needs_reconnect(ses, server) && !tcon->need_reconnect) { 29238c8a9a5SSteve French spin_unlock(&ses->chan_lock); 29338c8a9a5SSteve French return 0; 29438c8a9a5SSteve French } 29538c8a9a5SSteve French spin_unlock(&ses->chan_lock); 29638c8a9a5SSteve French cifs_dbg(FYI, "sess reconnect mask: 0x%lx, tcon reconnect: %d", 29738c8a9a5SSteve French tcon->ses->chans_need_reconnect, 29838c8a9a5SSteve French tcon->need_reconnect); 29938c8a9a5SSteve French 30038c8a9a5SSteve French mutex_lock(&ses->session_mutex); 30138c8a9a5SSteve French /* 3023e161536SShyam Prasad N * if this is called by delayed work, and the channel has been disabled 3033e161536SShyam Prasad N * in parallel, the delayed work can continue to execute in parallel 3043e161536SShyam Prasad N * there's a chance that this channel may not exist anymore 3053e161536SShyam Prasad N */ 3063e161536SShyam Prasad N spin_lock(&server->srv_lock); 3073e161536SShyam Prasad N if (server->tcpStatus == CifsExiting) { 3083e161536SShyam Prasad N spin_unlock(&server->srv_lock); 3093e161536SShyam Prasad N mutex_unlock(&ses->session_mutex); 3103e161536SShyam Prasad N rc = -EHOSTDOWN; 3113e161536SShyam Prasad N goto out; 3123e161536SShyam Prasad N } 3133e161536SShyam Prasad N 3143e161536SShyam Prasad N /* 31538c8a9a5SSteve French * Recheck after acquire mutex. If another thread is negotiating 31638c8a9a5SSteve French * and the server never sends an answer the socket will be closed 31738c8a9a5SSteve French * and tcpStatus set to reconnect. 31838c8a9a5SSteve French */ 31938c8a9a5SSteve French if (server->tcpStatus == CifsNeedReconnect) { 32038c8a9a5SSteve French spin_unlock(&server->srv_lock); 32138c8a9a5SSteve French mutex_unlock(&ses->session_mutex); 32238c8a9a5SSteve French 32338c8a9a5SSteve French if (tcon->retry) 32438c8a9a5SSteve French goto again; 32538c8a9a5SSteve French 32638c8a9a5SSteve French rc = -EHOSTDOWN; 32738c8a9a5SSteve French goto out; 32838c8a9a5SSteve French } 32938c8a9a5SSteve French spin_unlock(&server->srv_lock); 33038c8a9a5SSteve French 331a43f95fdSWinston Wen nls_codepage = ses->local_nls; 33238c8a9a5SSteve French 33338c8a9a5SSteve French /* 33438c8a9a5SSteve French * need to prevent multiple threads trying to simultaneously 33538c8a9a5SSteve French * reconnect the same SMB session 33638c8a9a5SSteve French */ 33738c8a9a5SSteve French spin_lock(&ses->ses_lock); 33838c8a9a5SSteve French spin_lock(&ses->chan_lock); 33938c8a9a5SSteve French if (!cifs_chan_needs_reconnect(ses, server) && 34038c8a9a5SSteve French ses->ses_status == SES_GOOD) { 34138c8a9a5SSteve French spin_unlock(&ses->chan_lock); 34238c8a9a5SSteve French spin_unlock(&ses->ses_lock); 34338c8a9a5SSteve French /* this means that we only need to tree connect */ 34438c8a9a5SSteve French if (tcon->need_reconnect) 34538c8a9a5SSteve French goto skip_sess_setup; 34638c8a9a5SSteve French 34738c8a9a5SSteve French mutex_unlock(&ses->session_mutex); 34838c8a9a5SSteve French goto out; 34938c8a9a5SSteve French } 35038c8a9a5SSteve French spin_unlock(&ses->chan_lock); 35138c8a9a5SSteve French spin_unlock(&ses->ses_lock); 35238c8a9a5SSteve French 35338c8a9a5SSteve French rc = cifs_negotiate_protocol(0, ses, server); 35438c8a9a5SSteve French if (!rc) { 3553e161536SShyam Prasad N /* 3563e161536SShyam Prasad N * if server stopped supporting multichannel 3573e161536SShyam Prasad N * and the first channel reconnected, disable all the others. 3583e161536SShyam Prasad N */ 3593e161536SShyam Prasad N if (ses->chan_count > 1 && 3603e161536SShyam Prasad N !(server->capabilities & SMB2_GLOBAL_CAP_MULTI_CHANNEL)) { 36150e8363eSShyam Prasad N rc = cifs_chan_skip_or_disable(ses, server, 36250e8363eSShyam Prasad N from_reconnect); 36350e8363eSShyam Prasad N if (rc) { 3643e161536SShyam Prasad N mutex_unlock(&ses->session_mutex); 3653e161536SShyam Prasad N goto out; 3663e161536SShyam Prasad N } 3673e161536SShyam Prasad N } 3683e161536SShyam Prasad N 36938c8a9a5SSteve French rc = cifs_setup_session(0, ses, server, nls_codepage); 37038c8a9a5SSteve French if ((rc == -EACCES) && !tcon->retry) { 37138c8a9a5SSteve French mutex_unlock(&ses->session_mutex); 37238c8a9a5SSteve French rc = -EHOSTDOWN; 37338c8a9a5SSteve French goto failed; 37438c8a9a5SSteve French } else if (rc) { 37538c8a9a5SSteve French mutex_unlock(&ses->session_mutex); 37638c8a9a5SSteve French goto out; 37738c8a9a5SSteve French } 37838c8a9a5SSteve French } else { 37938c8a9a5SSteve French mutex_unlock(&ses->session_mutex); 38038c8a9a5SSteve French goto out; 38138c8a9a5SSteve French } 38238c8a9a5SSteve French 38338c8a9a5SSteve French skip_sess_setup: 38438c8a9a5SSteve French if (!tcon->need_reconnect) { 38538c8a9a5SSteve French mutex_unlock(&ses->session_mutex); 38638c8a9a5SSteve French goto out; 38738c8a9a5SSteve French } 38838c8a9a5SSteve French cifs_mark_open_files_invalid(tcon); 38938c8a9a5SSteve French if (tcon->use_persistent) 39038c8a9a5SSteve French tcon->need_reopen_files = true; 39138c8a9a5SSteve French 39238c8a9a5SSteve French rc = cifs_tree_connect(0, tcon, nls_codepage); 39338c8a9a5SSteve French 39438c8a9a5SSteve French cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc); 39538c8a9a5SSteve French if (rc) { 39638c8a9a5SSteve French /* If sess reconnected but tcon didn't, something strange ... */ 3975075e9f4SShyam Prasad N mutex_unlock(&ses->session_mutex); 39838c8a9a5SSteve French cifs_dbg(VFS, "reconnect tcon failed rc = %d\n", rc); 39938c8a9a5SSteve French goto out; 40038c8a9a5SSteve French } 40138c8a9a5SSteve French 4025075e9f4SShyam Prasad N if (!rc && 4035075e9f4SShyam Prasad N (server->capabilities & SMB2_GLOBAL_CAP_MULTI_CHANNEL)) { 4045075e9f4SShyam Prasad N mutex_unlock(&ses->session_mutex); 4055075e9f4SShyam Prasad N 4065075e9f4SShyam Prasad N /* 4075075e9f4SShyam Prasad N * query server network interfaces, in case they change 4085075e9f4SShyam Prasad N */ 4095075e9f4SShyam Prasad N xid = get_xid(); 4105075e9f4SShyam Prasad N rc = SMB3_request_interfaces(xid, tcon, false); 4115075e9f4SShyam Prasad N free_xid(xid); 4125075e9f4SShyam Prasad N 413*fb708025SShyam Prasad N if (rc == -EOPNOTSUPP && ses->chan_count > 1) { 41450e8363eSShyam Prasad N /* 41550e8363eSShyam Prasad N * some servers like Azure SMB server do not advertise 41650e8363eSShyam Prasad N * that multichannel has been disabled with server 41750e8363eSShyam Prasad N * capabilities, rather return STATUS_NOT_IMPLEMENTED. 41850e8363eSShyam Prasad N * treat this as server not supporting multichannel 41950e8363eSShyam Prasad N */ 42050e8363eSShyam Prasad N 42150e8363eSShyam Prasad N rc = cifs_chan_skip_or_disable(ses, server, 42250e8363eSShyam Prasad N from_reconnect); 42350e8363eSShyam Prasad N goto skip_add_channels; 42450e8363eSShyam Prasad N } else if (rc) 4255075e9f4SShyam Prasad N cifs_dbg(FYI, "%s: failed to query server interfaces: %d\n", 4265075e9f4SShyam Prasad N __func__, rc); 4275075e9f4SShyam Prasad N 4285075e9f4SShyam Prasad N if (ses->chan_max > ses->chan_count && 42950e8363eSShyam Prasad N ses->iface_count && 4305075e9f4SShyam Prasad N !SERVER_IS_CHAN(server)) { 4315075e9f4SShyam Prasad N if (ses->chan_count == 1) 4325075e9f4SShyam Prasad N cifs_server_dbg(VFS, "supports multichannel now\n"); 4335075e9f4SShyam Prasad N 4345075e9f4SShyam Prasad N cifs_try_adding_channels(ses); 4355075e9f4SShyam Prasad N } 4365075e9f4SShyam Prasad N } else { 4375075e9f4SShyam Prasad N mutex_unlock(&ses->session_mutex); 4385075e9f4SShyam Prasad N } 43950e8363eSShyam Prasad N skip_add_channels: 4405075e9f4SShyam Prasad N 44138c8a9a5SSteve French if (smb2_command != SMB2_INTERNAL_CMD) 442fe8c187fSShyam Prasad N mod_delayed_work(cifsiod_wq, &server->reconnect, 0); 44338c8a9a5SSteve French 44438c8a9a5SSteve French atomic_inc(&tconInfoReconnectCount); 44538c8a9a5SSteve French out: 44638c8a9a5SSteve French /* 44738c8a9a5SSteve French * Check if handle based operation so we know whether we can continue 44838c8a9a5SSteve French * or not without returning to caller to reset file handle. 44938c8a9a5SSteve French */ 45038c8a9a5SSteve French /* 45138c8a9a5SSteve French * BB Is flush done by server on drop of tcp session? Should we special 45238c8a9a5SSteve French * case it and skip above? 45338c8a9a5SSteve French */ 45438c8a9a5SSteve French switch (smb2_command) { 45538c8a9a5SSteve French case SMB2_FLUSH: 45638c8a9a5SSteve French case SMB2_READ: 45738c8a9a5SSteve French case SMB2_WRITE: 45838c8a9a5SSteve French case SMB2_LOCK: 45938c8a9a5SSteve French case SMB2_QUERY_DIRECTORY: 46038c8a9a5SSteve French case SMB2_CHANGE_NOTIFY: 46138c8a9a5SSteve French case SMB2_QUERY_INFO: 46238c8a9a5SSteve French case SMB2_SET_INFO: 46338c8a9a5SSteve French rc = -EAGAIN; 46438c8a9a5SSteve French } 46538c8a9a5SSteve French failed: 46638c8a9a5SSteve French return rc; 46738c8a9a5SSteve French } 46838c8a9a5SSteve French 46938c8a9a5SSteve French static void 47038c8a9a5SSteve French fill_small_buf(__le16 smb2_command, struct cifs_tcon *tcon, 47138c8a9a5SSteve French struct TCP_Server_Info *server, 47238c8a9a5SSteve French void *buf, 47338c8a9a5SSteve French unsigned int *total_len) 47438c8a9a5SSteve French { 47538c8a9a5SSteve French struct smb2_pdu *spdu = buf; 47638c8a9a5SSteve French /* lookup word count ie StructureSize from table */ 47738c8a9a5SSteve French __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_command)]; 47838c8a9a5SSteve French 47938c8a9a5SSteve French /* 48038c8a9a5SSteve French * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of 48138c8a9a5SSteve French * largest operations (Create) 48238c8a9a5SSteve French */ 48338c8a9a5SSteve French memset(buf, 0, 256); 48438c8a9a5SSteve French 48538c8a9a5SSteve French smb2_hdr_assemble(&spdu->hdr, smb2_command, tcon, server); 48638c8a9a5SSteve French spdu->StructureSize2 = cpu_to_le16(parmsize); 48738c8a9a5SSteve French 48838c8a9a5SSteve French *total_len = parmsize + sizeof(struct smb2_hdr); 48938c8a9a5SSteve French } 49038c8a9a5SSteve French 49138c8a9a5SSteve French /* 49238c8a9a5SSteve French * Allocate and return pointer to an SMB request hdr, and set basic 49338c8a9a5SSteve French * SMB information in the SMB header. If the return code is zero, this 49438c8a9a5SSteve French * function must have filled in request_buf pointer. 49538c8a9a5SSteve French */ 49638c8a9a5SSteve French static int __smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon, 49738c8a9a5SSteve French struct TCP_Server_Info *server, 49838c8a9a5SSteve French void **request_buf, unsigned int *total_len) 49938c8a9a5SSteve French { 50038c8a9a5SSteve French /* BB eventually switch this to SMB2 specific small buf size */ 5013b5f0d0aSPaulo Alcantara switch (smb2_command) { 5023b5f0d0aSPaulo Alcantara case SMB2_SET_INFO: 5033b5f0d0aSPaulo Alcantara case SMB2_QUERY_INFO: 50438c8a9a5SSteve French *request_buf = cifs_buf_get(); 5053b5f0d0aSPaulo Alcantara break; 5063b5f0d0aSPaulo Alcantara default: 50738c8a9a5SSteve French *request_buf = cifs_small_buf_get(); 5083b5f0d0aSPaulo Alcantara break; 5093b5f0d0aSPaulo Alcantara } 51038c8a9a5SSteve French if (*request_buf == NULL) { 51138c8a9a5SSteve French /* BB should we add a retry in here if not a writepage? */ 51238c8a9a5SSteve French return -ENOMEM; 51338c8a9a5SSteve French } 51438c8a9a5SSteve French 51538c8a9a5SSteve French fill_small_buf(smb2_command, tcon, server, 51638c8a9a5SSteve French (struct smb2_hdr *)(*request_buf), 51738c8a9a5SSteve French total_len); 51838c8a9a5SSteve French 51938c8a9a5SSteve French if (tcon != NULL) { 52038c8a9a5SSteve French uint16_t com_code = le16_to_cpu(smb2_command); 52138c8a9a5SSteve French cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]); 52238c8a9a5SSteve French cifs_stats_inc(&tcon->num_smbs_sent); 52338c8a9a5SSteve French } 52438c8a9a5SSteve French 52538c8a9a5SSteve French return 0; 52638c8a9a5SSteve French } 52738c8a9a5SSteve French 52838c8a9a5SSteve French static int smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon, 52938c8a9a5SSteve French struct TCP_Server_Info *server, 53038c8a9a5SSteve French void **request_buf, unsigned int *total_len) 53138c8a9a5SSteve French { 53238c8a9a5SSteve French int rc; 53338c8a9a5SSteve French 53407e86408SShyam Prasad N rc = smb2_reconnect(smb2_command, tcon, server, false); 53538c8a9a5SSteve French if (rc) 53638c8a9a5SSteve French return rc; 53738c8a9a5SSteve French 53838c8a9a5SSteve French return __smb2_plain_req_init(smb2_command, tcon, server, request_buf, 53938c8a9a5SSteve French total_len); 54038c8a9a5SSteve French } 54138c8a9a5SSteve French 54238c8a9a5SSteve French static int smb2_ioctl_req_init(u32 opcode, struct cifs_tcon *tcon, 54338c8a9a5SSteve French struct TCP_Server_Info *server, 54438c8a9a5SSteve French void **request_buf, unsigned int *total_len) 54538c8a9a5SSteve French { 54638c8a9a5SSteve French /* Skip reconnect only for FSCTL_VALIDATE_NEGOTIATE_INFO IOCTLs */ 54738c8a9a5SSteve French if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO) { 54838c8a9a5SSteve French return __smb2_plain_req_init(SMB2_IOCTL, tcon, server, 54938c8a9a5SSteve French request_buf, total_len); 55038c8a9a5SSteve French } 55138c8a9a5SSteve French return smb2_plain_req_init(SMB2_IOCTL, tcon, server, 55238c8a9a5SSteve French request_buf, total_len); 55338c8a9a5SSteve French } 55438c8a9a5SSteve French 55538c8a9a5SSteve French /* For explanation of negotiate contexts see MS-SMB2 section 2.2.3.1 */ 55638c8a9a5SSteve French 55738c8a9a5SSteve French static void 55838c8a9a5SSteve French build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt) 55938c8a9a5SSteve French { 56038c8a9a5SSteve French pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES; 56138c8a9a5SSteve French pneg_ctxt->DataLength = cpu_to_le16(38); 56238c8a9a5SSteve French pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1); 56338c8a9a5SSteve French pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE); 56438c8a9a5SSteve French get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE); 56538c8a9a5SSteve French pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512; 56638c8a9a5SSteve French } 56738c8a9a5SSteve French 56838c8a9a5SSteve French static void 56938c8a9a5SSteve French build_compression_ctxt(struct smb2_compression_capabilities_context *pneg_ctxt) 57038c8a9a5SSteve French { 57138c8a9a5SSteve French pneg_ctxt->ContextType = SMB2_COMPRESSION_CAPABILITIES; 57238c8a9a5SSteve French pneg_ctxt->DataLength = 57338c8a9a5SSteve French cpu_to_le16(sizeof(struct smb2_compression_capabilities_context) 57438c8a9a5SSteve French - sizeof(struct smb2_neg_context)); 57538c8a9a5SSteve French pneg_ctxt->CompressionAlgorithmCount = cpu_to_le16(3); 57638c8a9a5SSteve French pneg_ctxt->CompressionAlgorithms[0] = SMB3_COMPRESS_LZ77; 57738c8a9a5SSteve French pneg_ctxt->CompressionAlgorithms[1] = SMB3_COMPRESS_LZ77_HUFF; 57838c8a9a5SSteve French pneg_ctxt->CompressionAlgorithms[2] = SMB3_COMPRESS_LZNT1; 57938c8a9a5SSteve French } 58038c8a9a5SSteve French 58138c8a9a5SSteve French static unsigned int 58238c8a9a5SSteve French build_signing_ctxt(struct smb2_signing_capabilities *pneg_ctxt) 58338c8a9a5SSteve French { 58438c8a9a5SSteve French unsigned int ctxt_len = sizeof(struct smb2_signing_capabilities); 58538c8a9a5SSteve French unsigned short num_algs = 1; /* number of signing algorithms sent */ 58638c8a9a5SSteve French 58738c8a9a5SSteve French pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES; 58838c8a9a5SSteve French /* 58938c8a9a5SSteve French * Context Data length must be rounded to multiple of 8 for some servers 59038c8a9a5SSteve French */ 59138c8a9a5SSteve French pneg_ctxt->DataLength = cpu_to_le16(ALIGN(sizeof(struct smb2_signing_capabilities) - 59238c8a9a5SSteve French sizeof(struct smb2_neg_context) + 59338c8a9a5SSteve French (num_algs * sizeof(u16)), 8)); 59438c8a9a5SSteve French pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(num_algs); 59538c8a9a5SSteve French pneg_ctxt->SigningAlgorithms[0] = cpu_to_le16(SIGNING_ALG_AES_CMAC); 59638c8a9a5SSteve French 59738c8a9a5SSteve French ctxt_len += sizeof(__le16) * num_algs; 59838c8a9a5SSteve French ctxt_len = ALIGN(ctxt_len, 8); 59938c8a9a5SSteve French return ctxt_len; 60038c8a9a5SSteve French /* TBD add SIGNING_ALG_AES_GMAC and/or SIGNING_ALG_HMAC_SHA256 */ 60138c8a9a5SSteve French } 60238c8a9a5SSteve French 60338c8a9a5SSteve French static void 60438c8a9a5SSteve French build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt) 60538c8a9a5SSteve French { 60638c8a9a5SSteve French pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES; 60738c8a9a5SSteve French if (require_gcm_256) { 60838c8a9a5SSteve French pneg_ctxt->DataLength = cpu_to_le16(4); /* Cipher Count + 1 cipher */ 60938c8a9a5SSteve French pneg_ctxt->CipherCount = cpu_to_le16(1); 61038c8a9a5SSteve French pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES256_GCM; 61138c8a9a5SSteve French } else if (enable_gcm_256) { 61238c8a9a5SSteve French pneg_ctxt->DataLength = cpu_to_le16(8); /* Cipher Count + 3 ciphers */ 61338c8a9a5SSteve French pneg_ctxt->CipherCount = cpu_to_le16(3); 61438c8a9a5SSteve French pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM; 61538c8a9a5SSteve French pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES256_GCM; 61638c8a9a5SSteve French pneg_ctxt->Ciphers[2] = SMB2_ENCRYPTION_AES128_CCM; 61738c8a9a5SSteve French } else { 61838c8a9a5SSteve French pneg_ctxt->DataLength = cpu_to_le16(6); /* Cipher Count + 2 ciphers */ 61938c8a9a5SSteve French pneg_ctxt->CipherCount = cpu_to_le16(2); 62038c8a9a5SSteve French pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM; 62138c8a9a5SSteve French pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES128_CCM; 62238c8a9a5SSteve French } 62338c8a9a5SSteve French } 62438c8a9a5SSteve French 62538c8a9a5SSteve French static unsigned int 62638c8a9a5SSteve French build_netname_ctxt(struct smb2_netname_neg_context *pneg_ctxt, char *hostname) 62738c8a9a5SSteve French { 62838c8a9a5SSteve French struct nls_table *cp = load_nls_default(); 62938c8a9a5SSteve French 63038c8a9a5SSteve French pneg_ctxt->ContextType = SMB2_NETNAME_NEGOTIATE_CONTEXT_ID; 63138c8a9a5SSteve French 63238c8a9a5SSteve French /* copy up to max of first 100 bytes of server name to NetName field */ 63338c8a9a5SSteve French pneg_ctxt->DataLength = cpu_to_le16(2 * cifs_strtoUTF16(pneg_ctxt->NetName, hostname, 100, cp)); 63438c8a9a5SSteve French /* context size is DataLength + minimal smb2_neg_context */ 63538c8a9a5SSteve French return ALIGN(le16_to_cpu(pneg_ctxt->DataLength) + sizeof(struct smb2_neg_context), 8); 63638c8a9a5SSteve French } 63738c8a9a5SSteve French 63838c8a9a5SSteve French static void 63938c8a9a5SSteve French build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt) 64038c8a9a5SSteve French { 64138c8a9a5SSteve French pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE; 64238c8a9a5SSteve French pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN); 64338c8a9a5SSteve French /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */ 64438c8a9a5SSteve French pneg_ctxt->Name[0] = 0x93; 64538c8a9a5SSteve French pneg_ctxt->Name[1] = 0xAD; 64638c8a9a5SSteve French pneg_ctxt->Name[2] = 0x25; 64738c8a9a5SSteve French pneg_ctxt->Name[3] = 0x50; 64838c8a9a5SSteve French pneg_ctxt->Name[4] = 0x9C; 64938c8a9a5SSteve French pneg_ctxt->Name[5] = 0xB4; 65038c8a9a5SSteve French pneg_ctxt->Name[6] = 0x11; 65138c8a9a5SSteve French pneg_ctxt->Name[7] = 0xE7; 65238c8a9a5SSteve French pneg_ctxt->Name[8] = 0xB4; 65338c8a9a5SSteve French pneg_ctxt->Name[9] = 0x23; 65438c8a9a5SSteve French pneg_ctxt->Name[10] = 0x83; 65538c8a9a5SSteve French pneg_ctxt->Name[11] = 0xDE; 65638c8a9a5SSteve French pneg_ctxt->Name[12] = 0x96; 65738c8a9a5SSteve French pneg_ctxt->Name[13] = 0x8B; 65838c8a9a5SSteve French pneg_ctxt->Name[14] = 0xCD; 65938c8a9a5SSteve French pneg_ctxt->Name[15] = 0x7C; 66038c8a9a5SSteve French } 66138c8a9a5SSteve French 66238c8a9a5SSteve French static void 66338c8a9a5SSteve French assemble_neg_contexts(struct smb2_negotiate_req *req, 66438c8a9a5SSteve French struct TCP_Server_Info *server, unsigned int *total_len) 66538c8a9a5SSteve French { 66638c8a9a5SSteve French unsigned int ctxt_len, neg_context_count; 66738c8a9a5SSteve French struct TCP_Server_Info *pserver; 66838c8a9a5SSteve French char *pneg_ctxt; 66938c8a9a5SSteve French char *hostname; 67038c8a9a5SSteve French 67138c8a9a5SSteve French if (*total_len > 200) { 67238c8a9a5SSteve French /* In case length corrupted don't want to overrun smb buffer */ 67338c8a9a5SSteve French cifs_server_dbg(VFS, "Bad frame length assembling neg contexts\n"); 67438c8a9a5SSteve French return; 67538c8a9a5SSteve French } 67638c8a9a5SSteve French 67738c8a9a5SSteve French /* 67838c8a9a5SSteve French * round up total_len of fixed part of SMB3 negotiate request to 8 67938c8a9a5SSteve French * byte boundary before adding negotiate contexts 68038c8a9a5SSteve French */ 68138c8a9a5SSteve French *total_len = ALIGN(*total_len, 8); 68238c8a9a5SSteve French 68338c8a9a5SSteve French pneg_ctxt = (*total_len) + (char *)req; 68438c8a9a5SSteve French req->NegotiateContextOffset = cpu_to_le32(*total_len); 68538c8a9a5SSteve French 68638c8a9a5SSteve French build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt); 68738c8a9a5SSteve French ctxt_len = ALIGN(sizeof(struct smb2_preauth_neg_context), 8); 68838c8a9a5SSteve French *total_len += ctxt_len; 68938c8a9a5SSteve French pneg_ctxt += ctxt_len; 69038c8a9a5SSteve French 69138c8a9a5SSteve French build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt); 69238c8a9a5SSteve French ctxt_len = ALIGN(sizeof(struct smb2_encryption_neg_context), 8); 69338c8a9a5SSteve French *total_len += ctxt_len; 69438c8a9a5SSteve French pneg_ctxt += ctxt_len; 69538c8a9a5SSteve French 69638c8a9a5SSteve French /* 69738c8a9a5SSteve French * secondary channels don't have the hostname field populated 69838c8a9a5SSteve French * use the hostname field in the primary channel instead 69938c8a9a5SSteve French */ 700b3773b19SSteve French pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 70138c8a9a5SSteve French cifs_server_lock(pserver); 70238c8a9a5SSteve French hostname = pserver->hostname; 70338c8a9a5SSteve French if (hostname && (hostname[0] != 0)) { 70438c8a9a5SSteve French ctxt_len = build_netname_ctxt((struct smb2_netname_neg_context *)pneg_ctxt, 70538c8a9a5SSteve French hostname); 70638c8a9a5SSteve French *total_len += ctxt_len; 70738c8a9a5SSteve French pneg_ctxt += ctxt_len; 70838c8a9a5SSteve French neg_context_count = 3; 70938c8a9a5SSteve French } else 71038c8a9a5SSteve French neg_context_count = 2; 71138c8a9a5SSteve French cifs_server_unlock(pserver); 71238c8a9a5SSteve French 71338c8a9a5SSteve French build_posix_ctxt((struct smb2_posix_neg_context *)pneg_ctxt); 71438c8a9a5SSteve French *total_len += sizeof(struct smb2_posix_neg_context); 71538c8a9a5SSteve French pneg_ctxt += sizeof(struct smb2_posix_neg_context); 71638c8a9a5SSteve French neg_context_count++; 71738c8a9a5SSteve French 71838c8a9a5SSteve French if (server->compress_algorithm) { 71938c8a9a5SSteve French build_compression_ctxt((struct smb2_compression_capabilities_context *) 72038c8a9a5SSteve French pneg_ctxt); 72138c8a9a5SSteve French ctxt_len = ALIGN(sizeof(struct smb2_compression_capabilities_context), 8); 72238c8a9a5SSteve French *total_len += ctxt_len; 72338c8a9a5SSteve French pneg_ctxt += ctxt_len; 72438c8a9a5SSteve French neg_context_count++; 72538c8a9a5SSteve French } 72638c8a9a5SSteve French 72738c8a9a5SSteve French if (enable_negotiate_signing) { 72838c8a9a5SSteve French ctxt_len = build_signing_ctxt((struct smb2_signing_capabilities *) 72938c8a9a5SSteve French pneg_ctxt); 73038c8a9a5SSteve French *total_len += ctxt_len; 73138c8a9a5SSteve French pneg_ctxt += ctxt_len; 73238c8a9a5SSteve French neg_context_count++; 73338c8a9a5SSteve French } 73438c8a9a5SSteve French 73538c8a9a5SSteve French /* check for and add transport_capabilities and signing capabilities */ 73638c8a9a5SSteve French req->NegotiateContextCount = cpu_to_le16(neg_context_count); 73738c8a9a5SSteve French 73838c8a9a5SSteve French } 73938c8a9a5SSteve French 74038c8a9a5SSteve French /* If invalid preauth context warn but use what we requested, SHA-512 */ 74138c8a9a5SSteve French static void decode_preauth_context(struct smb2_preauth_neg_context *ctxt) 74238c8a9a5SSteve French { 74338c8a9a5SSteve French unsigned int len = le16_to_cpu(ctxt->DataLength); 74438c8a9a5SSteve French 74538c8a9a5SSteve French /* 74638c8a9a5SSteve French * Caller checked that DataLength remains within SMB boundary. We still 74738c8a9a5SSteve French * need to confirm that one HashAlgorithms member is accounted for. 74838c8a9a5SSteve French */ 74938c8a9a5SSteve French if (len < MIN_PREAUTH_CTXT_DATA_LEN) { 75038c8a9a5SSteve French pr_warn_once("server sent bad preauth context\n"); 75138c8a9a5SSteve French return; 75238c8a9a5SSteve French } else if (len < MIN_PREAUTH_CTXT_DATA_LEN + le16_to_cpu(ctxt->SaltLength)) { 75338c8a9a5SSteve French pr_warn_once("server sent invalid SaltLength\n"); 75438c8a9a5SSteve French return; 75538c8a9a5SSteve French } 75638c8a9a5SSteve French if (le16_to_cpu(ctxt->HashAlgorithmCount) != 1) 75738c8a9a5SSteve French pr_warn_once("Invalid SMB3 hash algorithm count\n"); 75838c8a9a5SSteve French if (ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512) 75938c8a9a5SSteve French pr_warn_once("unknown SMB3 hash algorithm\n"); 76038c8a9a5SSteve French } 76138c8a9a5SSteve French 76238c8a9a5SSteve French static void decode_compress_ctx(struct TCP_Server_Info *server, 76338c8a9a5SSteve French struct smb2_compression_capabilities_context *ctxt) 76438c8a9a5SSteve French { 76538c8a9a5SSteve French unsigned int len = le16_to_cpu(ctxt->DataLength); 76638c8a9a5SSteve French 76738c8a9a5SSteve French /* 76838c8a9a5SSteve French * Caller checked that DataLength remains within SMB boundary. We still 76938c8a9a5SSteve French * need to confirm that one CompressionAlgorithms member is accounted 77038c8a9a5SSteve French * for. 77138c8a9a5SSteve French */ 77238c8a9a5SSteve French if (len < 10) { 77338c8a9a5SSteve French pr_warn_once("server sent bad compression cntxt\n"); 77438c8a9a5SSteve French return; 77538c8a9a5SSteve French } 77638c8a9a5SSteve French if (le16_to_cpu(ctxt->CompressionAlgorithmCount) != 1) { 77738c8a9a5SSteve French pr_warn_once("Invalid SMB3 compress algorithm count\n"); 77838c8a9a5SSteve French return; 77938c8a9a5SSteve French } 78038c8a9a5SSteve French if (le16_to_cpu(ctxt->CompressionAlgorithms[0]) > 3) { 78138c8a9a5SSteve French pr_warn_once("unknown compression algorithm\n"); 78238c8a9a5SSteve French return; 78338c8a9a5SSteve French } 78438c8a9a5SSteve French server->compress_algorithm = ctxt->CompressionAlgorithms[0]; 78538c8a9a5SSteve French } 78638c8a9a5SSteve French 78738c8a9a5SSteve French static int decode_encrypt_ctx(struct TCP_Server_Info *server, 78838c8a9a5SSteve French struct smb2_encryption_neg_context *ctxt) 78938c8a9a5SSteve French { 79038c8a9a5SSteve French unsigned int len = le16_to_cpu(ctxt->DataLength); 79138c8a9a5SSteve French 79238c8a9a5SSteve French cifs_dbg(FYI, "decode SMB3.11 encryption neg context of len %d\n", len); 79338c8a9a5SSteve French /* 79438c8a9a5SSteve French * Caller checked that DataLength remains within SMB boundary. We still 79538c8a9a5SSteve French * need to confirm that one Cipher flexible array member is accounted 79638c8a9a5SSteve French * for. 79738c8a9a5SSteve French */ 79838c8a9a5SSteve French if (len < MIN_ENCRYPT_CTXT_DATA_LEN) { 79938c8a9a5SSteve French pr_warn_once("server sent bad crypto ctxt len\n"); 80038c8a9a5SSteve French return -EINVAL; 80138c8a9a5SSteve French } 80238c8a9a5SSteve French 80338c8a9a5SSteve French if (le16_to_cpu(ctxt->CipherCount) != 1) { 80438c8a9a5SSteve French pr_warn_once("Invalid SMB3.11 cipher count\n"); 80538c8a9a5SSteve French return -EINVAL; 80638c8a9a5SSteve French } 80738c8a9a5SSteve French cifs_dbg(FYI, "SMB311 cipher type:%d\n", le16_to_cpu(ctxt->Ciphers[0])); 80838c8a9a5SSteve French if (require_gcm_256) { 80938c8a9a5SSteve French if (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES256_GCM) { 81038c8a9a5SSteve French cifs_dbg(VFS, "Server does not support requested encryption type (AES256 GCM)\n"); 81138c8a9a5SSteve French return -EOPNOTSUPP; 81238c8a9a5SSteve French } 81338c8a9a5SSteve French } else if (ctxt->Ciphers[0] == 0) { 81438c8a9a5SSteve French /* 81538c8a9a5SSteve French * e.g. if server only supported AES256_CCM (very unlikely) 81638c8a9a5SSteve French * or server supported no encryption types or had all disabled. 81738c8a9a5SSteve French * Since GLOBAL_CAP_ENCRYPTION will be not set, in the case 81838c8a9a5SSteve French * in which mount requested encryption ("seal") checks later 81938c8a9a5SSteve French * on during tree connection will return proper rc, but if 82038c8a9a5SSteve French * seal not requested by client, since server is allowed to 82138c8a9a5SSteve French * return 0 to indicate no supported cipher, we can't fail here 82238c8a9a5SSteve French */ 82338c8a9a5SSteve French server->cipher_type = 0; 82438c8a9a5SSteve French server->capabilities &= ~SMB2_GLOBAL_CAP_ENCRYPTION; 82538c8a9a5SSteve French pr_warn_once("Server does not support requested encryption types\n"); 82638c8a9a5SSteve French return 0; 82738c8a9a5SSteve French } else if ((ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_CCM) && 82838c8a9a5SSteve French (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_GCM) && 82938c8a9a5SSteve French (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES256_GCM)) { 83038c8a9a5SSteve French /* server returned a cipher we didn't ask for */ 83138c8a9a5SSteve French pr_warn_once("Invalid SMB3.11 cipher returned\n"); 83238c8a9a5SSteve French return -EINVAL; 83338c8a9a5SSteve French } 83438c8a9a5SSteve French server->cipher_type = ctxt->Ciphers[0]; 83538c8a9a5SSteve French server->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION; 83638c8a9a5SSteve French return 0; 83738c8a9a5SSteve French } 83838c8a9a5SSteve French 83938c8a9a5SSteve French static void decode_signing_ctx(struct TCP_Server_Info *server, 84038c8a9a5SSteve French struct smb2_signing_capabilities *pctxt) 84138c8a9a5SSteve French { 84238c8a9a5SSteve French unsigned int len = le16_to_cpu(pctxt->DataLength); 84338c8a9a5SSteve French 84438c8a9a5SSteve French /* 84538c8a9a5SSteve French * Caller checked that DataLength remains within SMB boundary. We still 84638c8a9a5SSteve French * need to confirm that one SigningAlgorithms flexible array member is 84738c8a9a5SSteve French * accounted for. 84838c8a9a5SSteve French */ 84938c8a9a5SSteve French if ((len < 4) || (len > 16)) { 85038c8a9a5SSteve French pr_warn_once("server sent bad signing negcontext\n"); 85138c8a9a5SSteve French return; 85238c8a9a5SSteve French } 85338c8a9a5SSteve French if (le16_to_cpu(pctxt->SigningAlgorithmCount) != 1) { 85438c8a9a5SSteve French pr_warn_once("Invalid signing algorithm count\n"); 85538c8a9a5SSteve French return; 85638c8a9a5SSteve French } 85738c8a9a5SSteve French if (le16_to_cpu(pctxt->SigningAlgorithms[0]) > 2) { 85838c8a9a5SSteve French pr_warn_once("unknown signing algorithm\n"); 85938c8a9a5SSteve French return; 86038c8a9a5SSteve French } 86138c8a9a5SSteve French 86238c8a9a5SSteve French server->signing_negotiated = true; 86338c8a9a5SSteve French server->signing_algorithm = le16_to_cpu(pctxt->SigningAlgorithms[0]); 86438c8a9a5SSteve French cifs_dbg(FYI, "signing algorithm %d chosen\n", 86538c8a9a5SSteve French server->signing_algorithm); 86638c8a9a5SSteve French } 86738c8a9a5SSteve French 86838c8a9a5SSteve French 86938c8a9a5SSteve French static int smb311_decode_neg_context(struct smb2_negotiate_rsp *rsp, 87038c8a9a5SSteve French struct TCP_Server_Info *server, 87138c8a9a5SSteve French unsigned int len_of_smb) 87238c8a9a5SSteve French { 87338c8a9a5SSteve French struct smb2_neg_context *pctx; 87438c8a9a5SSteve French unsigned int offset = le32_to_cpu(rsp->NegotiateContextOffset); 87538c8a9a5SSteve French unsigned int ctxt_cnt = le16_to_cpu(rsp->NegotiateContextCount); 87638c8a9a5SSteve French unsigned int len_of_ctxts, i; 87738c8a9a5SSteve French int rc = 0; 87838c8a9a5SSteve French 87938c8a9a5SSteve French cifs_dbg(FYI, "decoding %d negotiate contexts\n", ctxt_cnt); 88038c8a9a5SSteve French if (len_of_smb <= offset) { 88138c8a9a5SSteve French cifs_server_dbg(VFS, "Invalid response: negotiate context offset\n"); 88238c8a9a5SSteve French return -EINVAL; 88338c8a9a5SSteve French } 88438c8a9a5SSteve French 88538c8a9a5SSteve French len_of_ctxts = len_of_smb - offset; 88638c8a9a5SSteve French 88738c8a9a5SSteve French for (i = 0; i < ctxt_cnt; i++) { 88838c8a9a5SSteve French int clen; 88938c8a9a5SSteve French /* check that offset is not beyond end of SMB */ 89038c8a9a5SSteve French if (len_of_ctxts < sizeof(struct smb2_neg_context)) 89138c8a9a5SSteve French break; 89238c8a9a5SSteve French 89338c8a9a5SSteve French pctx = (struct smb2_neg_context *)(offset + (char *)rsp); 89438c8a9a5SSteve French clen = sizeof(struct smb2_neg_context) 89538c8a9a5SSteve French + le16_to_cpu(pctx->DataLength); 89638c8a9a5SSteve French /* 89738c8a9a5SSteve French * 2.2.4 SMB2 NEGOTIATE Response 89838c8a9a5SSteve French * Subsequent negotiate contexts MUST appear at the first 8-byte 89938c8a9a5SSteve French * aligned offset following the previous negotiate context. 90038c8a9a5SSteve French */ 90138c8a9a5SSteve French if (i + 1 != ctxt_cnt) 90238c8a9a5SSteve French clen = ALIGN(clen, 8); 90338c8a9a5SSteve French if (clen > len_of_ctxts) 90438c8a9a5SSteve French break; 90538c8a9a5SSteve French 90638c8a9a5SSteve French if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) 90738c8a9a5SSteve French decode_preauth_context( 90838c8a9a5SSteve French (struct smb2_preauth_neg_context *)pctx); 90938c8a9a5SSteve French else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) 91038c8a9a5SSteve French rc = decode_encrypt_ctx(server, 91138c8a9a5SSteve French (struct smb2_encryption_neg_context *)pctx); 91238c8a9a5SSteve French else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) 91338c8a9a5SSteve French decode_compress_ctx(server, 91438c8a9a5SSteve French (struct smb2_compression_capabilities_context *)pctx); 91538c8a9a5SSteve French else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) 91638c8a9a5SSteve French server->posix_ext_supported = true; 91738c8a9a5SSteve French else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) 91838c8a9a5SSteve French decode_signing_ctx(server, 91938c8a9a5SSteve French (struct smb2_signing_capabilities *)pctx); 92038c8a9a5SSteve French else 92138c8a9a5SSteve French cifs_server_dbg(VFS, "unknown negcontext of type %d ignored\n", 92238c8a9a5SSteve French le16_to_cpu(pctx->ContextType)); 92338c8a9a5SSteve French if (rc) 92438c8a9a5SSteve French break; 92538c8a9a5SSteve French 92638c8a9a5SSteve French offset += clen; 92738c8a9a5SSteve French len_of_ctxts -= clen; 92838c8a9a5SSteve French } 92938c8a9a5SSteve French return rc; 93038c8a9a5SSteve French } 93138c8a9a5SSteve French 93238c8a9a5SSteve French static struct create_posix * 93338c8a9a5SSteve French create_posix_buf(umode_t mode) 93438c8a9a5SSteve French { 93538c8a9a5SSteve French struct create_posix *buf; 93638c8a9a5SSteve French 93738c8a9a5SSteve French buf = kzalloc(sizeof(struct create_posix), 93838c8a9a5SSteve French GFP_KERNEL); 93938c8a9a5SSteve French if (!buf) 94038c8a9a5SSteve French return NULL; 94138c8a9a5SSteve French 94238c8a9a5SSteve French buf->ccontext.DataOffset = 94338c8a9a5SSteve French cpu_to_le16(offsetof(struct create_posix, Mode)); 94438c8a9a5SSteve French buf->ccontext.DataLength = cpu_to_le32(4); 94538c8a9a5SSteve French buf->ccontext.NameOffset = 94638c8a9a5SSteve French cpu_to_le16(offsetof(struct create_posix, Name)); 94738c8a9a5SSteve French buf->ccontext.NameLength = cpu_to_le16(16); 94838c8a9a5SSteve French 94938c8a9a5SSteve French /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */ 95038c8a9a5SSteve French buf->Name[0] = 0x93; 95138c8a9a5SSteve French buf->Name[1] = 0xAD; 95238c8a9a5SSteve French buf->Name[2] = 0x25; 95338c8a9a5SSteve French buf->Name[3] = 0x50; 95438c8a9a5SSteve French buf->Name[4] = 0x9C; 95538c8a9a5SSteve French buf->Name[5] = 0xB4; 95638c8a9a5SSteve French buf->Name[6] = 0x11; 95738c8a9a5SSteve French buf->Name[7] = 0xE7; 95838c8a9a5SSteve French buf->Name[8] = 0xB4; 95938c8a9a5SSteve French buf->Name[9] = 0x23; 96038c8a9a5SSteve French buf->Name[10] = 0x83; 96138c8a9a5SSteve French buf->Name[11] = 0xDE; 96238c8a9a5SSteve French buf->Name[12] = 0x96; 96338c8a9a5SSteve French buf->Name[13] = 0x8B; 96438c8a9a5SSteve French buf->Name[14] = 0xCD; 96538c8a9a5SSteve French buf->Name[15] = 0x7C; 96638c8a9a5SSteve French buf->Mode = cpu_to_le32(mode); 96738c8a9a5SSteve French cifs_dbg(FYI, "mode on posix create 0%o\n", mode); 96838c8a9a5SSteve French return buf; 96938c8a9a5SSteve French } 97038c8a9a5SSteve French 97138c8a9a5SSteve French static int 97238c8a9a5SSteve French add_posix_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode) 97338c8a9a5SSteve French { 97438c8a9a5SSteve French unsigned int num = *num_iovec; 97538c8a9a5SSteve French 97638c8a9a5SSteve French iov[num].iov_base = create_posix_buf(mode); 97738c8a9a5SSteve French if (mode == ACL_NO_MODE) 978c8ebf077SSteve French cifs_dbg(FYI, "%s: no mode\n", __func__); 97938c8a9a5SSteve French if (iov[num].iov_base == NULL) 98038c8a9a5SSteve French return -ENOMEM; 98138c8a9a5SSteve French iov[num].iov_len = sizeof(struct create_posix); 98238c8a9a5SSteve French *num_iovec = num + 1; 98338c8a9a5SSteve French return 0; 98438c8a9a5SSteve French } 98538c8a9a5SSteve French 98638c8a9a5SSteve French 98738c8a9a5SSteve French /* 98838c8a9a5SSteve French * 98938c8a9a5SSteve French * SMB2 Worker functions follow: 99038c8a9a5SSteve French * 99138c8a9a5SSteve French * The general structure of the worker functions is: 99238c8a9a5SSteve French * 1) Call smb2_init (assembles SMB2 header) 99338c8a9a5SSteve French * 2) Initialize SMB2 command specific fields in fixed length area of SMB 99438c8a9a5SSteve French * 3) Call smb_sendrcv2 (sends request on socket and waits for response) 99538c8a9a5SSteve French * 4) Decode SMB2 command specific fields in the fixed length area 99638c8a9a5SSteve French * 5) Decode variable length data area (if any for this SMB2 command type) 99738c8a9a5SSteve French * 6) Call free smb buffer 99838c8a9a5SSteve French * 7) return 99938c8a9a5SSteve French * 100038c8a9a5SSteve French */ 100138c8a9a5SSteve French 100238c8a9a5SSteve French int 100338c8a9a5SSteve French SMB2_negotiate(const unsigned int xid, 100438c8a9a5SSteve French struct cifs_ses *ses, 100538c8a9a5SSteve French struct TCP_Server_Info *server) 100638c8a9a5SSteve French { 100738c8a9a5SSteve French struct smb_rqst rqst; 100838c8a9a5SSteve French struct smb2_negotiate_req *req; 100938c8a9a5SSteve French struct smb2_negotiate_rsp *rsp; 101038c8a9a5SSteve French struct kvec iov[1]; 101138c8a9a5SSteve French struct kvec rsp_iov; 101238c8a9a5SSteve French int rc; 101338c8a9a5SSteve French int resp_buftype; 101438c8a9a5SSteve French int blob_offset, blob_length; 101538c8a9a5SSteve French char *security_blob; 101638c8a9a5SSteve French int flags = CIFS_NEG_OP; 101738c8a9a5SSteve French unsigned int total_len; 101838c8a9a5SSteve French 101938c8a9a5SSteve French cifs_dbg(FYI, "Negotiate protocol\n"); 102038c8a9a5SSteve French 102138c8a9a5SSteve French if (!server) { 102238c8a9a5SSteve French WARN(1, "%s: server is NULL!\n", __func__); 102338c8a9a5SSteve French return -EIO; 102438c8a9a5SSteve French } 102538c8a9a5SSteve French 102638c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_NEGOTIATE, NULL, server, 102738c8a9a5SSteve French (void **) &req, &total_len); 102838c8a9a5SSteve French if (rc) 102938c8a9a5SSteve French return rc; 103038c8a9a5SSteve French 103138c8a9a5SSteve French req->hdr.SessionId = 0; 103238c8a9a5SSteve French 103338c8a9a5SSteve French memset(server->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE); 103438c8a9a5SSteve French memset(ses->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE); 103538c8a9a5SSteve French 103638c8a9a5SSteve French if (strcmp(server->vals->version_string, 103738c8a9a5SSteve French SMB3ANY_VERSION_STRING) == 0) { 103838c8a9a5SSteve French req->Dialects[0] = cpu_to_le16(SMB30_PROT_ID); 103938c8a9a5SSteve French req->Dialects[1] = cpu_to_le16(SMB302_PROT_ID); 104038c8a9a5SSteve French req->Dialects[2] = cpu_to_le16(SMB311_PROT_ID); 104138c8a9a5SSteve French req->DialectCount = cpu_to_le16(3); 104238c8a9a5SSteve French total_len += 6; 104338c8a9a5SSteve French } else if (strcmp(server->vals->version_string, 104438c8a9a5SSteve French SMBDEFAULT_VERSION_STRING) == 0) { 104538c8a9a5SSteve French req->Dialects[0] = cpu_to_le16(SMB21_PROT_ID); 104638c8a9a5SSteve French req->Dialects[1] = cpu_to_le16(SMB30_PROT_ID); 104738c8a9a5SSteve French req->Dialects[2] = cpu_to_le16(SMB302_PROT_ID); 104838c8a9a5SSteve French req->Dialects[3] = cpu_to_le16(SMB311_PROT_ID); 104938c8a9a5SSteve French req->DialectCount = cpu_to_le16(4); 105038c8a9a5SSteve French total_len += 8; 105138c8a9a5SSteve French } else { 105238c8a9a5SSteve French /* otherwise send specific dialect */ 105338c8a9a5SSteve French req->Dialects[0] = cpu_to_le16(server->vals->protocol_id); 105438c8a9a5SSteve French req->DialectCount = cpu_to_le16(1); 105538c8a9a5SSteve French total_len += 2; 105638c8a9a5SSteve French } 105738c8a9a5SSteve French 105838c8a9a5SSteve French /* only one of SMB2 signing flags may be set in SMB2 request */ 105938c8a9a5SSteve French if (ses->sign) 106038c8a9a5SSteve French req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED); 106138c8a9a5SSteve French else if (global_secflags & CIFSSEC_MAY_SIGN) 106238c8a9a5SSteve French req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED); 106338c8a9a5SSteve French else 106438c8a9a5SSteve French req->SecurityMode = 0; 106538c8a9a5SSteve French 106638c8a9a5SSteve French req->Capabilities = cpu_to_le32(server->vals->req_capabilities); 106738c8a9a5SSteve French if (ses->chan_max > 1) 106838c8a9a5SSteve French req->Capabilities |= cpu_to_le32(SMB2_GLOBAL_CAP_MULTI_CHANNEL); 106938c8a9a5SSteve French 107038c8a9a5SSteve French /* ClientGUID must be zero for SMB2.02 dialect */ 107138c8a9a5SSteve French if (server->vals->protocol_id == SMB20_PROT_ID) 107238c8a9a5SSteve French memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE); 107338c8a9a5SSteve French else { 107438c8a9a5SSteve French memcpy(req->ClientGUID, server->client_guid, 107538c8a9a5SSteve French SMB2_CLIENT_GUID_SIZE); 107638c8a9a5SSteve French if ((server->vals->protocol_id == SMB311_PROT_ID) || 107738c8a9a5SSteve French (strcmp(server->vals->version_string, 107838c8a9a5SSteve French SMB3ANY_VERSION_STRING) == 0) || 107938c8a9a5SSteve French (strcmp(server->vals->version_string, 108038c8a9a5SSteve French SMBDEFAULT_VERSION_STRING) == 0)) 108138c8a9a5SSteve French assemble_neg_contexts(req, server, &total_len); 108238c8a9a5SSteve French } 108338c8a9a5SSteve French iov[0].iov_base = (char *)req; 108438c8a9a5SSteve French iov[0].iov_len = total_len; 108538c8a9a5SSteve French 108638c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 108738c8a9a5SSteve French rqst.rq_iov = iov; 108838c8a9a5SSteve French rqst.rq_nvec = 1; 108938c8a9a5SSteve French 109038c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 109138c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 109238c8a9a5SSteve French cifs_small_buf_release(req); 109338c8a9a5SSteve French rsp = (struct smb2_negotiate_rsp *)rsp_iov.iov_base; 109438c8a9a5SSteve French /* 109538c8a9a5SSteve French * No tcon so can't do 109638c8a9a5SSteve French * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); 109738c8a9a5SSteve French */ 109838c8a9a5SSteve French if (rc == -EOPNOTSUPP) { 109938c8a9a5SSteve French cifs_server_dbg(VFS, "Dialect not supported by server. Consider specifying vers=1.0 or vers=2.0 on mount for accessing older servers\n"); 110038c8a9a5SSteve French goto neg_exit; 110138c8a9a5SSteve French } else if (rc != 0) 110238c8a9a5SSteve French goto neg_exit; 110338c8a9a5SSteve French 110438c8a9a5SSteve French rc = -EIO; 110538c8a9a5SSteve French if (strcmp(server->vals->version_string, 110638c8a9a5SSteve French SMB3ANY_VERSION_STRING) == 0) { 110738c8a9a5SSteve French if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) { 110838c8a9a5SSteve French cifs_server_dbg(VFS, 110938c8a9a5SSteve French "SMB2 dialect returned but not requested\n"); 111038c8a9a5SSteve French goto neg_exit; 111138c8a9a5SSteve French } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) { 111238c8a9a5SSteve French cifs_server_dbg(VFS, 111338c8a9a5SSteve French "SMB2.1 dialect returned but not requested\n"); 111438c8a9a5SSteve French goto neg_exit; 111538c8a9a5SSteve French } else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) { 111638c8a9a5SSteve French /* ops set to 3.0 by default for default so update */ 111738c8a9a5SSteve French server->ops = &smb311_operations; 111838c8a9a5SSteve French server->vals = &smb311_values; 111938c8a9a5SSteve French } 112038c8a9a5SSteve French } else if (strcmp(server->vals->version_string, 112138c8a9a5SSteve French SMBDEFAULT_VERSION_STRING) == 0) { 112238c8a9a5SSteve French if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) { 112338c8a9a5SSteve French cifs_server_dbg(VFS, 112438c8a9a5SSteve French "SMB2 dialect returned but not requested\n"); 112538c8a9a5SSteve French goto neg_exit; 112638c8a9a5SSteve French } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) { 112738c8a9a5SSteve French /* ops set to 3.0 by default for default so update */ 112838c8a9a5SSteve French server->ops = &smb21_operations; 112938c8a9a5SSteve French server->vals = &smb21_values; 113038c8a9a5SSteve French } else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) { 113138c8a9a5SSteve French server->ops = &smb311_operations; 113238c8a9a5SSteve French server->vals = &smb311_values; 113338c8a9a5SSteve French } 113438c8a9a5SSteve French } else if (le16_to_cpu(rsp->DialectRevision) != 113538c8a9a5SSteve French server->vals->protocol_id) { 113638c8a9a5SSteve French /* if requested single dialect ensure returned dialect matched */ 113738c8a9a5SSteve French cifs_server_dbg(VFS, "Invalid 0x%x dialect returned: not requested\n", 113838c8a9a5SSteve French le16_to_cpu(rsp->DialectRevision)); 113938c8a9a5SSteve French goto neg_exit; 114038c8a9a5SSteve French } 114138c8a9a5SSteve French 114238c8a9a5SSteve French cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode); 114338c8a9a5SSteve French 114438c8a9a5SSteve French if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) 114538c8a9a5SSteve French cifs_dbg(FYI, "negotiated smb2.0 dialect\n"); 114638c8a9a5SSteve French else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) 114738c8a9a5SSteve French cifs_dbg(FYI, "negotiated smb2.1 dialect\n"); 114838c8a9a5SSteve French else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID)) 114938c8a9a5SSteve French cifs_dbg(FYI, "negotiated smb3.0 dialect\n"); 115038c8a9a5SSteve French else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID)) 115138c8a9a5SSteve French cifs_dbg(FYI, "negotiated smb3.02 dialect\n"); 115238c8a9a5SSteve French else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) 115338c8a9a5SSteve French cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n"); 115438c8a9a5SSteve French else { 115538c8a9a5SSteve French cifs_server_dbg(VFS, "Invalid dialect returned by server 0x%x\n", 115638c8a9a5SSteve French le16_to_cpu(rsp->DialectRevision)); 115738c8a9a5SSteve French goto neg_exit; 115838c8a9a5SSteve French } 115938c8a9a5SSteve French 116038c8a9a5SSteve French rc = 0; 116138c8a9a5SSteve French server->dialect = le16_to_cpu(rsp->DialectRevision); 116238c8a9a5SSteve French 116338c8a9a5SSteve French /* 116438c8a9a5SSteve French * Keep a copy of the hash after negprot. This hash will be 116538c8a9a5SSteve French * the starting hash value for all sessions made from this 116638c8a9a5SSteve French * server. 116738c8a9a5SSteve French */ 116838c8a9a5SSteve French memcpy(server->preauth_sha_hash, ses->preauth_sha_hash, 116938c8a9a5SSteve French SMB2_PREAUTH_HASH_SIZE); 117038c8a9a5SSteve French 117138c8a9a5SSteve French /* SMB2 only has an extended negflavor */ 117238c8a9a5SSteve French server->negflavor = CIFS_NEGFLAVOR_EXTENDED; 117338c8a9a5SSteve French /* set it to the maximum buffer size value we can send with 1 credit */ 117438c8a9a5SSteve French server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize), 117538c8a9a5SSteve French SMB2_MAX_BUFFER_SIZE); 117638c8a9a5SSteve French server->max_read = le32_to_cpu(rsp->MaxReadSize); 117738c8a9a5SSteve French server->max_write = le32_to_cpu(rsp->MaxWriteSize); 117838c8a9a5SSteve French server->sec_mode = le16_to_cpu(rsp->SecurityMode); 117938c8a9a5SSteve French if ((server->sec_mode & SMB2_SEC_MODE_FLAGS_ALL) != server->sec_mode) 118038c8a9a5SSteve French cifs_dbg(FYI, "Server returned unexpected security mode 0x%x\n", 118138c8a9a5SSteve French server->sec_mode); 118238c8a9a5SSteve French server->capabilities = le32_to_cpu(rsp->Capabilities); 118338c8a9a5SSteve French /* Internal types */ 118438c8a9a5SSteve French server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES; 118538c8a9a5SSteve French 118638c8a9a5SSteve French /* 118738c8a9a5SSteve French * SMB3.0 supports only 1 cipher and doesn't have a encryption neg context 118838c8a9a5SSteve French * Set the cipher type manually. 118938c8a9a5SSteve French */ 119038c8a9a5SSteve French if (server->dialect == SMB30_PROT_ID && (server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION)) 119138c8a9a5SSteve French server->cipher_type = SMB2_ENCRYPTION_AES128_CCM; 119238c8a9a5SSteve French 119338c8a9a5SSteve French security_blob = smb2_get_data_area_len(&blob_offset, &blob_length, 119438c8a9a5SSteve French (struct smb2_hdr *)rsp); 119538c8a9a5SSteve French /* 119638c8a9a5SSteve French * See MS-SMB2 section 2.2.4: if no blob, client picks default which 119738c8a9a5SSteve French * for us will be 119838c8a9a5SSteve French * ses->sectype = RawNTLMSSP; 119938c8a9a5SSteve French * but for time being this is our only auth choice so doesn't matter. 120038c8a9a5SSteve French * We just found a server which sets blob length to zero expecting raw. 120138c8a9a5SSteve French */ 120238c8a9a5SSteve French if (blob_length == 0) { 120338c8a9a5SSteve French cifs_dbg(FYI, "missing security blob on negprot\n"); 120438c8a9a5SSteve French server->sec_ntlmssp = true; 120538c8a9a5SSteve French } 120638c8a9a5SSteve French 120738c8a9a5SSteve French rc = cifs_enable_signing(server, ses->sign); 120838c8a9a5SSteve French if (rc) 120938c8a9a5SSteve French goto neg_exit; 121038c8a9a5SSteve French if (blob_length) { 121138c8a9a5SSteve French rc = decode_negTokenInit(security_blob, blob_length, server); 121238c8a9a5SSteve French if (rc == 1) 121338c8a9a5SSteve French rc = 0; 121438c8a9a5SSteve French else if (rc == 0) 121538c8a9a5SSteve French rc = -EIO; 121638c8a9a5SSteve French } 121738c8a9a5SSteve French 121838c8a9a5SSteve French if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) { 121938c8a9a5SSteve French if (rsp->NegotiateContextCount) 122038c8a9a5SSteve French rc = smb311_decode_neg_context(rsp, server, 122138c8a9a5SSteve French rsp_iov.iov_len); 122238c8a9a5SSteve French else 122338c8a9a5SSteve French cifs_server_dbg(VFS, "Missing expected negotiate contexts\n"); 122438c8a9a5SSteve French } 122538c8a9a5SSteve French neg_exit: 122638c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp); 122738c8a9a5SSteve French return rc; 122838c8a9a5SSteve French } 122938c8a9a5SSteve French 123038c8a9a5SSteve French int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon) 123138c8a9a5SSteve French { 123238c8a9a5SSteve French int rc; 123338c8a9a5SSteve French struct validate_negotiate_info_req *pneg_inbuf; 123438c8a9a5SSteve French struct validate_negotiate_info_rsp *pneg_rsp = NULL; 123538c8a9a5SSteve French u32 rsplen; 123638c8a9a5SSteve French u32 inbuflen; /* max of 4 dialects */ 123738c8a9a5SSteve French struct TCP_Server_Info *server = tcon->ses->server; 123838c8a9a5SSteve French 123938c8a9a5SSteve French cifs_dbg(FYI, "validate negotiate\n"); 124038c8a9a5SSteve French 124138c8a9a5SSteve French /* In SMB3.11 preauth integrity supersedes validate negotiate */ 124238c8a9a5SSteve French if (server->dialect == SMB311_PROT_ID) 124338c8a9a5SSteve French return 0; 124438c8a9a5SSteve French 124538c8a9a5SSteve French /* 124638c8a9a5SSteve French * validation ioctl must be signed, so no point sending this if we 124738c8a9a5SSteve French * can not sign it (ie are not known user). Even if signing is not 124838c8a9a5SSteve French * required (enabled but not negotiated), in those cases we selectively 124938c8a9a5SSteve French * sign just this, the first and only signed request on a connection. 125038c8a9a5SSteve French * Having validation of negotiate info helps reduce attack vectors. 125138c8a9a5SSteve French */ 125238c8a9a5SSteve French if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) 125338c8a9a5SSteve French return 0; /* validation requires signing */ 125438c8a9a5SSteve French 125538c8a9a5SSteve French if (tcon->ses->user_name == NULL) { 125638c8a9a5SSteve French cifs_dbg(FYI, "Can't validate negotiate: null user mount\n"); 125738c8a9a5SSteve French return 0; /* validation requires signing */ 125838c8a9a5SSteve French } 125938c8a9a5SSteve French 126038c8a9a5SSteve French if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_NULL) 126138c8a9a5SSteve French cifs_tcon_dbg(VFS, "Unexpected null user (anonymous) auth flag sent by server\n"); 126238c8a9a5SSteve French 126338c8a9a5SSteve French pneg_inbuf = kmalloc(sizeof(*pneg_inbuf), GFP_NOFS); 126438c8a9a5SSteve French if (!pneg_inbuf) 126538c8a9a5SSteve French return -ENOMEM; 126638c8a9a5SSteve French 126738c8a9a5SSteve French pneg_inbuf->Capabilities = 126838c8a9a5SSteve French cpu_to_le32(server->vals->req_capabilities); 126938c8a9a5SSteve French if (tcon->ses->chan_max > 1) 127038c8a9a5SSteve French pneg_inbuf->Capabilities |= cpu_to_le32(SMB2_GLOBAL_CAP_MULTI_CHANNEL); 127138c8a9a5SSteve French 127238c8a9a5SSteve French memcpy(pneg_inbuf->Guid, server->client_guid, 127338c8a9a5SSteve French SMB2_CLIENT_GUID_SIZE); 127438c8a9a5SSteve French 127538c8a9a5SSteve French if (tcon->ses->sign) 127638c8a9a5SSteve French pneg_inbuf->SecurityMode = 127738c8a9a5SSteve French cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED); 127838c8a9a5SSteve French else if (global_secflags & CIFSSEC_MAY_SIGN) 127938c8a9a5SSteve French pneg_inbuf->SecurityMode = 128038c8a9a5SSteve French cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED); 128138c8a9a5SSteve French else 128238c8a9a5SSteve French pneg_inbuf->SecurityMode = 0; 128338c8a9a5SSteve French 128438c8a9a5SSteve French 128538c8a9a5SSteve French if (strcmp(server->vals->version_string, 128638c8a9a5SSteve French SMB3ANY_VERSION_STRING) == 0) { 128738c8a9a5SSteve French pneg_inbuf->Dialects[0] = cpu_to_le16(SMB30_PROT_ID); 128838c8a9a5SSteve French pneg_inbuf->Dialects[1] = cpu_to_le16(SMB302_PROT_ID); 128938c8a9a5SSteve French pneg_inbuf->Dialects[2] = cpu_to_le16(SMB311_PROT_ID); 129038c8a9a5SSteve French pneg_inbuf->DialectCount = cpu_to_le16(3); 129138c8a9a5SSteve French /* SMB 2.1 not included so subtract one dialect from len */ 129238c8a9a5SSteve French inbuflen = sizeof(*pneg_inbuf) - 129338c8a9a5SSteve French (sizeof(pneg_inbuf->Dialects[0])); 129438c8a9a5SSteve French } else if (strcmp(server->vals->version_string, 129538c8a9a5SSteve French SMBDEFAULT_VERSION_STRING) == 0) { 129638c8a9a5SSteve French pneg_inbuf->Dialects[0] = cpu_to_le16(SMB21_PROT_ID); 129738c8a9a5SSteve French pneg_inbuf->Dialects[1] = cpu_to_le16(SMB30_PROT_ID); 129838c8a9a5SSteve French pneg_inbuf->Dialects[2] = cpu_to_le16(SMB302_PROT_ID); 129938c8a9a5SSteve French pneg_inbuf->Dialects[3] = cpu_to_le16(SMB311_PROT_ID); 130038c8a9a5SSteve French pneg_inbuf->DialectCount = cpu_to_le16(4); 130138c8a9a5SSteve French /* structure is big enough for 4 dialects */ 130238c8a9a5SSteve French inbuflen = sizeof(*pneg_inbuf); 130338c8a9a5SSteve French } else { 130438c8a9a5SSteve French /* otherwise specific dialect was requested */ 130538c8a9a5SSteve French pneg_inbuf->Dialects[0] = 130638c8a9a5SSteve French cpu_to_le16(server->vals->protocol_id); 130738c8a9a5SSteve French pneg_inbuf->DialectCount = cpu_to_le16(1); 130838c8a9a5SSteve French /* structure is big enough for 4 dialects, sending only 1 */ 130938c8a9a5SSteve French inbuflen = sizeof(*pneg_inbuf) - 131038c8a9a5SSteve French sizeof(pneg_inbuf->Dialects[0]) * 3; 131138c8a9a5SSteve French } 131238c8a9a5SSteve French 131338c8a9a5SSteve French rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 131438c8a9a5SSteve French FSCTL_VALIDATE_NEGOTIATE_INFO, 131538c8a9a5SSteve French (char *)pneg_inbuf, inbuflen, CIFSMaxBufSize, 131638c8a9a5SSteve French (char **)&pneg_rsp, &rsplen); 131738c8a9a5SSteve French if (rc == -EOPNOTSUPP) { 131838c8a9a5SSteve French /* 131938c8a9a5SSteve French * Old Windows versions or Netapp SMB server can return 132038c8a9a5SSteve French * not supported error. Client should accept it. 132138c8a9a5SSteve French */ 132238c8a9a5SSteve French cifs_tcon_dbg(VFS, "Server does not support validate negotiate\n"); 132338c8a9a5SSteve French rc = 0; 132438c8a9a5SSteve French goto out_free_inbuf; 132538c8a9a5SSteve French } else if (rc != 0) { 132638c8a9a5SSteve French cifs_tcon_dbg(VFS, "validate protocol negotiate failed: %d\n", 132738c8a9a5SSteve French rc); 132838c8a9a5SSteve French rc = -EIO; 132938c8a9a5SSteve French goto out_free_inbuf; 133038c8a9a5SSteve French } 133138c8a9a5SSteve French 133238c8a9a5SSteve French rc = -EIO; 133338c8a9a5SSteve French if (rsplen != sizeof(*pneg_rsp)) { 133438c8a9a5SSteve French cifs_tcon_dbg(VFS, "Invalid protocol negotiate response size: %d\n", 133538c8a9a5SSteve French rsplen); 133638c8a9a5SSteve French 133738c8a9a5SSteve French /* relax check since Mac returns max bufsize allowed on ioctl */ 133838c8a9a5SSteve French if (rsplen > CIFSMaxBufSize || rsplen < sizeof(*pneg_rsp)) 133938c8a9a5SSteve French goto out_free_rsp; 134038c8a9a5SSteve French } 134138c8a9a5SSteve French 134238c8a9a5SSteve French /* check validate negotiate info response matches what we got earlier */ 134338c8a9a5SSteve French if (pneg_rsp->Dialect != cpu_to_le16(server->dialect)) 134438c8a9a5SSteve French goto vneg_out; 134538c8a9a5SSteve French 134638c8a9a5SSteve French if (pneg_rsp->SecurityMode != cpu_to_le16(server->sec_mode)) 134738c8a9a5SSteve French goto vneg_out; 134838c8a9a5SSteve French 134938c8a9a5SSteve French /* do not validate server guid because not saved at negprot time yet */ 135038c8a9a5SSteve French 135138c8a9a5SSteve French if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND | 135238c8a9a5SSteve French SMB2_LARGE_FILES) != server->capabilities) 135338c8a9a5SSteve French goto vneg_out; 135438c8a9a5SSteve French 135538c8a9a5SSteve French /* validate negotiate successful */ 135638c8a9a5SSteve French rc = 0; 135738c8a9a5SSteve French cifs_dbg(FYI, "validate negotiate info successful\n"); 135838c8a9a5SSteve French goto out_free_rsp; 135938c8a9a5SSteve French 136038c8a9a5SSteve French vneg_out: 136138c8a9a5SSteve French cifs_tcon_dbg(VFS, "protocol revalidation - security settings mismatch\n"); 136238c8a9a5SSteve French out_free_rsp: 136338c8a9a5SSteve French kfree(pneg_rsp); 136438c8a9a5SSteve French out_free_inbuf: 136538c8a9a5SSteve French kfree(pneg_inbuf); 136638c8a9a5SSteve French return rc; 136738c8a9a5SSteve French } 136838c8a9a5SSteve French 136938c8a9a5SSteve French enum securityEnum 137038c8a9a5SSteve French smb2_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested) 137138c8a9a5SSteve French { 137238c8a9a5SSteve French switch (requested) { 137338c8a9a5SSteve French case Kerberos: 137438c8a9a5SSteve French case RawNTLMSSP: 137538c8a9a5SSteve French return requested; 137638c8a9a5SSteve French case NTLMv2: 137738c8a9a5SSteve French return RawNTLMSSP; 137838c8a9a5SSteve French case Unspecified: 137938c8a9a5SSteve French if (server->sec_ntlmssp && 138038c8a9a5SSteve French (global_secflags & CIFSSEC_MAY_NTLMSSP)) 138138c8a9a5SSteve French return RawNTLMSSP; 138238c8a9a5SSteve French if ((server->sec_kerberos || server->sec_mskerberos) && 138338c8a9a5SSteve French (global_secflags & CIFSSEC_MAY_KRB5)) 138438c8a9a5SSteve French return Kerberos; 138538c8a9a5SSteve French fallthrough; 138638c8a9a5SSteve French default: 138738c8a9a5SSteve French return Unspecified; 138838c8a9a5SSteve French } 138938c8a9a5SSteve French } 139038c8a9a5SSteve French 139138c8a9a5SSteve French struct SMB2_sess_data { 139238c8a9a5SSteve French unsigned int xid; 139338c8a9a5SSteve French struct cifs_ses *ses; 139438c8a9a5SSteve French struct TCP_Server_Info *server; 139538c8a9a5SSteve French struct nls_table *nls_cp; 139638c8a9a5SSteve French void (*func)(struct SMB2_sess_data *); 139738c8a9a5SSteve French int result; 139838c8a9a5SSteve French u64 previous_session; 139938c8a9a5SSteve French 140038c8a9a5SSteve French /* we will send the SMB in three pieces: 140138c8a9a5SSteve French * a fixed length beginning part, an optional 140238c8a9a5SSteve French * SPNEGO blob (which can be zero length), and a 140338c8a9a5SSteve French * last part which will include the strings 140438c8a9a5SSteve French * and rest of bcc area. This allows us to avoid 140538c8a9a5SSteve French * a large buffer 17K allocation 140638c8a9a5SSteve French */ 140738c8a9a5SSteve French int buf0_type; 140838c8a9a5SSteve French struct kvec iov[2]; 140938c8a9a5SSteve French }; 141038c8a9a5SSteve French 141138c8a9a5SSteve French static int 141238c8a9a5SSteve French SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data) 141338c8a9a5SSteve French { 141438c8a9a5SSteve French int rc; 141538c8a9a5SSteve French struct cifs_ses *ses = sess_data->ses; 141638c8a9a5SSteve French struct TCP_Server_Info *server = sess_data->server; 141738c8a9a5SSteve French struct smb2_sess_setup_req *req; 141838c8a9a5SSteve French unsigned int total_len; 141938c8a9a5SSteve French bool is_binding = false; 142038c8a9a5SSteve French 142138c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_SESSION_SETUP, NULL, server, 142238c8a9a5SSteve French (void **) &req, 142338c8a9a5SSteve French &total_len); 142438c8a9a5SSteve French if (rc) 142538c8a9a5SSteve French return rc; 142638c8a9a5SSteve French 142738c8a9a5SSteve French spin_lock(&ses->ses_lock); 142838c8a9a5SSteve French is_binding = (ses->ses_status == SES_GOOD); 142938c8a9a5SSteve French spin_unlock(&ses->ses_lock); 143038c8a9a5SSteve French 143138c8a9a5SSteve French if (is_binding) { 143238c8a9a5SSteve French req->hdr.SessionId = cpu_to_le64(ses->Suid); 143338c8a9a5SSteve French req->hdr.Flags |= SMB2_FLAGS_SIGNED; 143438c8a9a5SSteve French req->PreviousSessionId = 0; 143538c8a9a5SSteve French req->Flags = SMB2_SESSION_REQ_FLAG_BINDING; 143638c8a9a5SSteve French cifs_dbg(FYI, "Binding to sess id: %llx\n", ses->Suid); 143738c8a9a5SSteve French } else { 143838c8a9a5SSteve French /* First session, not a reauthenticate */ 143938c8a9a5SSteve French req->hdr.SessionId = 0; 144038c8a9a5SSteve French /* 144138c8a9a5SSteve French * if reconnect, we need to send previous sess id 144238c8a9a5SSteve French * otherwise it is 0 144338c8a9a5SSteve French */ 144438c8a9a5SSteve French req->PreviousSessionId = cpu_to_le64(sess_data->previous_session); 144538c8a9a5SSteve French req->Flags = 0; /* MBZ */ 144638c8a9a5SSteve French cifs_dbg(FYI, "Fresh session. Previous: %llx\n", 144738c8a9a5SSteve French sess_data->previous_session); 144838c8a9a5SSteve French } 144938c8a9a5SSteve French 145038c8a9a5SSteve French /* enough to enable echos and oplocks and one max size write */ 14515e90aa21SShyam Prasad N if (server->credits >= server->max_credits) 14525e90aa21SShyam Prasad N req->hdr.CreditRequest = cpu_to_le16(0); 14535e90aa21SShyam Prasad N else 14545e90aa21SShyam Prasad N req->hdr.CreditRequest = cpu_to_le16( 14555e90aa21SShyam Prasad N min_t(int, server->max_credits - 14565e90aa21SShyam Prasad N server->credits, 130)); 145738c8a9a5SSteve French 145838c8a9a5SSteve French /* only one of SMB2 signing flags may be set in SMB2 request */ 145938c8a9a5SSteve French if (server->sign) 146038c8a9a5SSteve French req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED; 146138c8a9a5SSteve French else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */ 146238c8a9a5SSteve French req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED; 146338c8a9a5SSteve French else 146438c8a9a5SSteve French req->SecurityMode = 0; 146538c8a9a5SSteve French 146638c8a9a5SSteve French #ifdef CONFIG_CIFS_DFS_UPCALL 146738c8a9a5SSteve French req->Capabilities = cpu_to_le32(SMB2_GLOBAL_CAP_DFS); 146838c8a9a5SSteve French #else 146938c8a9a5SSteve French req->Capabilities = 0; 147038c8a9a5SSteve French #endif /* DFS_UPCALL */ 147138c8a9a5SSteve French 147238c8a9a5SSteve French req->Channel = 0; /* MBZ */ 147338c8a9a5SSteve French 147438c8a9a5SSteve French sess_data->iov[0].iov_base = (char *)req; 147538c8a9a5SSteve French /* 1 for pad */ 147638c8a9a5SSteve French sess_data->iov[0].iov_len = total_len - 1; 147738c8a9a5SSteve French /* 147838c8a9a5SSteve French * This variable will be used to clear the buffer 147938c8a9a5SSteve French * allocated above in case of any error in the calling function. 148038c8a9a5SSteve French */ 148138c8a9a5SSteve French sess_data->buf0_type = CIFS_SMALL_BUFFER; 148238c8a9a5SSteve French 148338c8a9a5SSteve French return 0; 148438c8a9a5SSteve French } 148538c8a9a5SSteve French 148638c8a9a5SSteve French static void 148738c8a9a5SSteve French SMB2_sess_free_buffer(struct SMB2_sess_data *sess_data) 148838c8a9a5SSteve French { 148938c8a9a5SSteve French struct kvec *iov = sess_data->iov; 149038c8a9a5SSteve French 149138c8a9a5SSteve French /* iov[1] is already freed by caller */ 149238c8a9a5SSteve French if (sess_data->buf0_type != CIFS_NO_BUFFER && iov[0].iov_base) 149338c8a9a5SSteve French memzero_explicit(iov[0].iov_base, iov[0].iov_len); 149438c8a9a5SSteve French 149538c8a9a5SSteve French free_rsp_buf(sess_data->buf0_type, iov[0].iov_base); 149638c8a9a5SSteve French sess_data->buf0_type = CIFS_NO_BUFFER; 149738c8a9a5SSteve French } 149838c8a9a5SSteve French 149938c8a9a5SSteve French static int 150038c8a9a5SSteve French SMB2_sess_sendreceive(struct SMB2_sess_data *sess_data) 150138c8a9a5SSteve French { 150238c8a9a5SSteve French int rc; 150338c8a9a5SSteve French struct smb_rqst rqst; 150438c8a9a5SSteve French struct smb2_sess_setup_req *req = sess_data->iov[0].iov_base; 150538c8a9a5SSteve French struct kvec rsp_iov = { NULL, 0 }; 150638c8a9a5SSteve French 150738c8a9a5SSteve French /* Testing shows that buffer offset must be at location of Buffer[0] */ 150838c8a9a5SSteve French req->SecurityBufferOffset = 150938c8a9a5SSteve French cpu_to_le16(sizeof(struct smb2_sess_setup_req)); 151038c8a9a5SSteve French req->SecurityBufferLength = cpu_to_le16(sess_data->iov[1].iov_len); 151138c8a9a5SSteve French 151238c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 151338c8a9a5SSteve French rqst.rq_iov = sess_data->iov; 151438c8a9a5SSteve French rqst.rq_nvec = 2; 151538c8a9a5SSteve French 151638c8a9a5SSteve French /* BB add code to build os and lm fields */ 151738c8a9a5SSteve French rc = cifs_send_recv(sess_data->xid, sess_data->ses, 151838c8a9a5SSteve French sess_data->server, 151938c8a9a5SSteve French &rqst, 152038c8a9a5SSteve French &sess_data->buf0_type, 152138c8a9a5SSteve French CIFS_LOG_ERROR | CIFS_SESS_OP, &rsp_iov); 152238c8a9a5SSteve French cifs_small_buf_release(sess_data->iov[0].iov_base); 152338c8a9a5SSteve French memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec)); 152438c8a9a5SSteve French 152538c8a9a5SSteve French return rc; 152638c8a9a5SSteve French } 152738c8a9a5SSteve French 152838c8a9a5SSteve French static int 152938c8a9a5SSteve French SMB2_sess_establish_session(struct SMB2_sess_data *sess_data) 153038c8a9a5SSteve French { 153138c8a9a5SSteve French int rc = 0; 153238c8a9a5SSteve French struct cifs_ses *ses = sess_data->ses; 153338c8a9a5SSteve French struct TCP_Server_Info *server = sess_data->server; 153438c8a9a5SSteve French 153538c8a9a5SSteve French cifs_server_lock(server); 153638c8a9a5SSteve French if (server->ops->generate_signingkey) { 153738c8a9a5SSteve French rc = server->ops->generate_signingkey(ses, server); 153838c8a9a5SSteve French if (rc) { 153938c8a9a5SSteve French cifs_dbg(FYI, 154038c8a9a5SSteve French "SMB3 session key generation failed\n"); 154138c8a9a5SSteve French cifs_server_unlock(server); 154238c8a9a5SSteve French return rc; 154338c8a9a5SSteve French } 154438c8a9a5SSteve French } 154538c8a9a5SSteve French if (!server->session_estab) { 154638c8a9a5SSteve French server->sequence_number = 0x2; 154738c8a9a5SSteve French server->session_estab = true; 154838c8a9a5SSteve French } 154938c8a9a5SSteve French cifs_server_unlock(server); 155038c8a9a5SSteve French 155138c8a9a5SSteve French cifs_dbg(FYI, "SMB2/3 session established successfully\n"); 155238c8a9a5SSteve French return rc; 155338c8a9a5SSteve French } 155438c8a9a5SSteve French 155538c8a9a5SSteve French #ifdef CONFIG_CIFS_UPCALL 155638c8a9a5SSteve French static void 155738c8a9a5SSteve French SMB2_auth_kerberos(struct SMB2_sess_data *sess_data) 155838c8a9a5SSteve French { 155938c8a9a5SSteve French int rc; 156038c8a9a5SSteve French struct cifs_ses *ses = sess_data->ses; 156138c8a9a5SSteve French struct TCP_Server_Info *server = sess_data->server; 156238c8a9a5SSteve French struct cifs_spnego_msg *msg; 156338c8a9a5SSteve French struct key *spnego_key = NULL; 156438c8a9a5SSteve French struct smb2_sess_setup_rsp *rsp = NULL; 156538c8a9a5SSteve French bool is_binding = false; 156638c8a9a5SSteve French 156738c8a9a5SSteve French rc = SMB2_sess_alloc_buffer(sess_data); 156838c8a9a5SSteve French if (rc) 156938c8a9a5SSteve French goto out; 157038c8a9a5SSteve French 157138c8a9a5SSteve French spnego_key = cifs_get_spnego_key(ses, server); 157238c8a9a5SSteve French if (IS_ERR(spnego_key)) { 157338c8a9a5SSteve French rc = PTR_ERR(spnego_key); 157438c8a9a5SSteve French if (rc == -ENOKEY) 157538c8a9a5SSteve French cifs_dbg(VFS, "Verify user has a krb5 ticket and keyutils is installed\n"); 157638c8a9a5SSteve French spnego_key = NULL; 157738c8a9a5SSteve French goto out; 157838c8a9a5SSteve French } 157938c8a9a5SSteve French 158038c8a9a5SSteve French msg = spnego_key->payload.data[0]; 158138c8a9a5SSteve French /* 158238c8a9a5SSteve French * check version field to make sure that cifs.upcall is 158338c8a9a5SSteve French * sending us a response in an expected form 158438c8a9a5SSteve French */ 158538c8a9a5SSteve French if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) { 158638c8a9a5SSteve French cifs_dbg(VFS, "bad cifs.upcall version. Expected %d got %d\n", 158738c8a9a5SSteve French CIFS_SPNEGO_UPCALL_VERSION, msg->version); 158838c8a9a5SSteve French rc = -EKEYREJECTED; 158938c8a9a5SSteve French goto out_put_spnego_key; 159038c8a9a5SSteve French } 159138c8a9a5SSteve French 159238c8a9a5SSteve French spin_lock(&ses->ses_lock); 159338c8a9a5SSteve French is_binding = (ses->ses_status == SES_GOOD); 159438c8a9a5SSteve French spin_unlock(&ses->ses_lock); 159538c8a9a5SSteve French 159638c8a9a5SSteve French /* keep session key if binding */ 159738c8a9a5SSteve French if (!is_binding) { 159838c8a9a5SSteve French kfree_sensitive(ses->auth_key.response); 159938c8a9a5SSteve French ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len, 160038c8a9a5SSteve French GFP_KERNEL); 160138c8a9a5SSteve French if (!ses->auth_key.response) { 160238c8a9a5SSteve French cifs_dbg(VFS, "Kerberos can't allocate (%u bytes) memory\n", 160338c8a9a5SSteve French msg->sesskey_len); 160438c8a9a5SSteve French rc = -ENOMEM; 160538c8a9a5SSteve French goto out_put_spnego_key; 160638c8a9a5SSteve French } 160738c8a9a5SSteve French ses->auth_key.len = msg->sesskey_len; 160838c8a9a5SSteve French } 160938c8a9a5SSteve French 161038c8a9a5SSteve French sess_data->iov[1].iov_base = msg->data + msg->sesskey_len; 161138c8a9a5SSteve French sess_data->iov[1].iov_len = msg->secblob_len; 161238c8a9a5SSteve French 161338c8a9a5SSteve French rc = SMB2_sess_sendreceive(sess_data); 161438c8a9a5SSteve French if (rc) 161538c8a9a5SSteve French goto out_put_spnego_key; 161638c8a9a5SSteve French 161738c8a9a5SSteve French rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base; 161838c8a9a5SSteve French /* keep session id and flags if binding */ 161938c8a9a5SSteve French if (!is_binding) { 162038c8a9a5SSteve French ses->Suid = le64_to_cpu(rsp->hdr.SessionId); 162138c8a9a5SSteve French ses->session_flags = le16_to_cpu(rsp->SessionFlags); 162238c8a9a5SSteve French } 162338c8a9a5SSteve French 162438c8a9a5SSteve French rc = SMB2_sess_establish_session(sess_data); 162538c8a9a5SSteve French out_put_spnego_key: 162638c8a9a5SSteve French key_invalidate(spnego_key); 162738c8a9a5SSteve French key_put(spnego_key); 162838c8a9a5SSteve French if (rc) { 162938c8a9a5SSteve French kfree_sensitive(ses->auth_key.response); 163038c8a9a5SSteve French ses->auth_key.response = NULL; 163138c8a9a5SSteve French ses->auth_key.len = 0; 163238c8a9a5SSteve French } 163338c8a9a5SSteve French out: 163438c8a9a5SSteve French sess_data->result = rc; 163538c8a9a5SSteve French sess_data->func = NULL; 163638c8a9a5SSteve French SMB2_sess_free_buffer(sess_data); 163738c8a9a5SSteve French } 163838c8a9a5SSteve French #else 163938c8a9a5SSteve French static void 164038c8a9a5SSteve French SMB2_auth_kerberos(struct SMB2_sess_data *sess_data) 164138c8a9a5SSteve French { 164238c8a9a5SSteve French cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n"); 164338c8a9a5SSteve French sess_data->result = -EOPNOTSUPP; 164438c8a9a5SSteve French sess_data->func = NULL; 164538c8a9a5SSteve French } 164638c8a9a5SSteve French #endif 164738c8a9a5SSteve French 164838c8a9a5SSteve French static void 164938c8a9a5SSteve French SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data); 165038c8a9a5SSteve French 165138c8a9a5SSteve French static void 165238c8a9a5SSteve French SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data) 165338c8a9a5SSteve French { 165438c8a9a5SSteve French int rc; 165538c8a9a5SSteve French struct cifs_ses *ses = sess_data->ses; 165638c8a9a5SSteve French struct TCP_Server_Info *server = sess_data->server; 165738c8a9a5SSteve French struct smb2_sess_setup_rsp *rsp = NULL; 165838c8a9a5SSteve French unsigned char *ntlmssp_blob = NULL; 165938c8a9a5SSteve French bool use_spnego = false; /* else use raw ntlmssp */ 166038c8a9a5SSteve French u16 blob_length = 0; 166138c8a9a5SSteve French bool is_binding = false; 166238c8a9a5SSteve French 166338c8a9a5SSteve French /* 166438c8a9a5SSteve French * If memory allocation is successful, caller of this function 166538c8a9a5SSteve French * frees it. 166638c8a9a5SSteve French */ 166738c8a9a5SSteve French ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL); 166838c8a9a5SSteve French if (!ses->ntlmssp) { 166938c8a9a5SSteve French rc = -ENOMEM; 167038c8a9a5SSteve French goto out_err; 167138c8a9a5SSteve French } 167238c8a9a5SSteve French ses->ntlmssp->sesskey_per_smbsess = true; 167338c8a9a5SSteve French 167438c8a9a5SSteve French rc = SMB2_sess_alloc_buffer(sess_data); 167538c8a9a5SSteve French if (rc) 167638c8a9a5SSteve French goto out_err; 167738c8a9a5SSteve French 167838c8a9a5SSteve French rc = build_ntlmssp_smb3_negotiate_blob(&ntlmssp_blob, 167938c8a9a5SSteve French &blob_length, ses, server, 168038c8a9a5SSteve French sess_data->nls_cp); 168138c8a9a5SSteve French if (rc) 168238c8a9a5SSteve French goto out; 168338c8a9a5SSteve French 168438c8a9a5SSteve French if (use_spnego) { 168538c8a9a5SSteve French /* BB eventually need to add this */ 168638c8a9a5SSteve French cifs_dbg(VFS, "spnego not supported for SMB2 yet\n"); 168738c8a9a5SSteve French rc = -EOPNOTSUPP; 168838c8a9a5SSteve French goto out; 168938c8a9a5SSteve French } 169038c8a9a5SSteve French sess_data->iov[1].iov_base = ntlmssp_blob; 169138c8a9a5SSteve French sess_data->iov[1].iov_len = blob_length; 169238c8a9a5SSteve French 169338c8a9a5SSteve French rc = SMB2_sess_sendreceive(sess_data); 169438c8a9a5SSteve French rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base; 169538c8a9a5SSteve French 169638c8a9a5SSteve French /* If true, rc here is expected and not an error */ 169738c8a9a5SSteve French if (sess_data->buf0_type != CIFS_NO_BUFFER && 169838c8a9a5SSteve French rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) 169938c8a9a5SSteve French rc = 0; 170038c8a9a5SSteve French 170138c8a9a5SSteve French if (rc) 170238c8a9a5SSteve French goto out; 170338c8a9a5SSteve French 170438c8a9a5SSteve French if (offsetof(struct smb2_sess_setup_rsp, Buffer) != 170538c8a9a5SSteve French le16_to_cpu(rsp->SecurityBufferOffset)) { 170638c8a9a5SSteve French cifs_dbg(VFS, "Invalid security buffer offset %d\n", 170738c8a9a5SSteve French le16_to_cpu(rsp->SecurityBufferOffset)); 170838c8a9a5SSteve French rc = -EIO; 170938c8a9a5SSteve French goto out; 171038c8a9a5SSteve French } 171138c8a9a5SSteve French rc = decode_ntlmssp_challenge(rsp->Buffer, 171238c8a9a5SSteve French le16_to_cpu(rsp->SecurityBufferLength), ses); 171338c8a9a5SSteve French if (rc) 171438c8a9a5SSteve French goto out; 171538c8a9a5SSteve French 171638c8a9a5SSteve French cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n"); 171738c8a9a5SSteve French 171838c8a9a5SSteve French spin_lock(&ses->ses_lock); 171938c8a9a5SSteve French is_binding = (ses->ses_status == SES_GOOD); 172038c8a9a5SSteve French spin_unlock(&ses->ses_lock); 172138c8a9a5SSteve French 172238c8a9a5SSteve French /* keep existing ses id and flags if binding */ 172338c8a9a5SSteve French if (!is_binding) { 172438c8a9a5SSteve French ses->Suid = le64_to_cpu(rsp->hdr.SessionId); 172538c8a9a5SSteve French ses->session_flags = le16_to_cpu(rsp->SessionFlags); 172638c8a9a5SSteve French } 172738c8a9a5SSteve French 172838c8a9a5SSteve French out: 172938c8a9a5SSteve French kfree_sensitive(ntlmssp_blob); 173038c8a9a5SSteve French SMB2_sess_free_buffer(sess_data); 173138c8a9a5SSteve French if (!rc) { 173238c8a9a5SSteve French sess_data->result = 0; 173338c8a9a5SSteve French sess_data->func = SMB2_sess_auth_rawntlmssp_authenticate; 173438c8a9a5SSteve French return; 173538c8a9a5SSteve French } 173638c8a9a5SSteve French out_err: 173738c8a9a5SSteve French kfree_sensitive(ses->ntlmssp); 173838c8a9a5SSteve French ses->ntlmssp = NULL; 173938c8a9a5SSteve French sess_data->result = rc; 174038c8a9a5SSteve French sess_data->func = NULL; 174138c8a9a5SSteve French } 174238c8a9a5SSteve French 174338c8a9a5SSteve French static void 174438c8a9a5SSteve French SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data) 174538c8a9a5SSteve French { 174638c8a9a5SSteve French int rc; 174738c8a9a5SSteve French struct cifs_ses *ses = sess_data->ses; 174838c8a9a5SSteve French struct TCP_Server_Info *server = sess_data->server; 174938c8a9a5SSteve French struct smb2_sess_setup_req *req; 175038c8a9a5SSteve French struct smb2_sess_setup_rsp *rsp = NULL; 175138c8a9a5SSteve French unsigned char *ntlmssp_blob = NULL; 175238c8a9a5SSteve French bool use_spnego = false; /* else use raw ntlmssp */ 175338c8a9a5SSteve French u16 blob_length = 0; 175438c8a9a5SSteve French bool is_binding = false; 175538c8a9a5SSteve French 175638c8a9a5SSteve French rc = SMB2_sess_alloc_buffer(sess_data); 175738c8a9a5SSteve French if (rc) 175838c8a9a5SSteve French goto out; 175938c8a9a5SSteve French 176038c8a9a5SSteve French req = (struct smb2_sess_setup_req *) sess_data->iov[0].iov_base; 176138c8a9a5SSteve French req->hdr.SessionId = cpu_to_le64(ses->Suid); 176238c8a9a5SSteve French 176338c8a9a5SSteve French rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, 176438c8a9a5SSteve French ses, server, 176538c8a9a5SSteve French sess_data->nls_cp); 176638c8a9a5SSteve French if (rc) { 176738c8a9a5SSteve French cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", rc); 176838c8a9a5SSteve French goto out; 176938c8a9a5SSteve French } 177038c8a9a5SSteve French 177138c8a9a5SSteve French if (use_spnego) { 177238c8a9a5SSteve French /* BB eventually need to add this */ 177338c8a9a5SSteve French cifs_dbg(VFS, "spnego not supported for SMB2 yet\n"); 177438c8a9a5SSteve French rc = -EOPNOTSUPP; 177538c8a9a5SSteve French goto out; 177638c8a9a5SSteve French } 177738c8a9a5SSteve French sess_data->iov[1].iov_base = ntlmssp_blob; 177838c8a9a5SSteve French sess_data->iov[1].iov_len = blob_length; 177938c8a9a5SSteve French 178038c8a9a5SSteve French rc = SMB2_sess_sendreceive(sess_data); 178138c8a9a5SSteve French if (rc) 178238c8a9a5SSteve French goto out; 178338c8a9a5SSteve French 178438c8a9a5SSteve French rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base; 178538c8a9a5SSteve French 178638c8a9a5SSteve French spin_lock(&ses->ses_lock); 178738c8a9a5SSteve French is_binding = (ses->ses_status == SES_GOOD); 178838c8a9a5SSteve French spin_unlock(&ses->ses_lock); 178938c8a9a5SSteve French 179038c8a9a5SSteve French /* keep existing ses id and flags if binding */ 179138c8a9a5SSteve French if (!is_binding) { 179238c8a9a5SSteve French ses->Suid = le64_to_cpu(rsp->hdr.SessionId); 179338c8a9a5SSteve French ses->session_flags = le16_to_cpu(rsp->SessionFlags); 179438c8a9a5SSteve French } 179538c8a9a5SSteve French 179638c8a9a5SSteve French rc = SMB2_sess_establish_session(sess_data); 179738c8a9a5SSteve French #ifdef CONFIG_CIFS_DEBUG_DUMP_KEYS 179838c8a9a5SSteve French if (ses->server->dialect < SMB30_PROT_ID) { 179938c8a9a5SSteve French cifs_dbg(VFS, "%s: dumping generated SMB2 session keys\n", __func__); 180038c8a9a5SSteve French /* 180138c8a9a5SSteve French * The session id is opaque in terms of endianness, so we can't 180238c8a9a5SSteve French * print it as a long long. we dump it as we got it on the wire 180338c8a9a5SSteve French */ 180438c8a9a5SSteve French cifs_dbg(VFS, "Session Id %*ph\n", (int)sizeof(ses->Suid), 180538c8a9a5SSteve French &ses->Suid); 180638c8a9a5SSteve French cifs_dbg(VFS, "Session Key %*ph\n", 180738c8a9a5SSteve French SMB2_NTLMV2_SESSKEY_SIZE, ses->auth_key.response); 180838c8a9a5SSteve French cifs_dbg(VFS, "Signing Key %*ph\n", 180938c8a9a5SSteve French SMB3_SIGN_KEY_SIZE, ses->auth_key.response); 181038c8a9a5SSteve French } 181138c8a9a5SSteve French #endif 181238c8a9a5SSteve French out: 181338c8a9a5SSteve French kfree_sensitive(ntlmssp_blob); 181438c8a9a5SSteve French SMB2_sess_free_buffer(sess_data); 181538c8a9a5SSteve French kfree_sensitive(ses->ntlmssp); 181638c8a9a5SSteve French ses->ntlmssp = NULL; 181738c8a9a5SSteve French sess_data->result = rc; 181838c8a9a5SSteve French sess_data->func = NULL; 181938c8a9a5SSteve French } 182038c8a9a5SSteve French 182138c8a9a5SSteve French static int 182238c8a9a5SSteve French SMB2_select_sec(struct SMB2_sess_data *sess_data) 182338c8a9a5SSteve French { 182438c8a9a5SSteve French int type; 182538c8a9a5SSteve French struct cifs_ses *ses = sess_data->ses; 182638c8a9a5SSteve French struct TCP_Server_Info *server = sess_data->server; 182738c8a9a5SSteve French 182838c8a9a5SSteve French type = smb2_select_sectype(server, ses->sectype); 182938c8a9a5SSteve French cifs_dbg(FYI, "sess setup type %d\n", type); 183038c8a9a5SSteve French if (type == Unspecified) { 183138c8a9a5SSteve French cifs_dbg(VFS, "Unable to select appropriate authentication method!\n"); 183238c8a9a5SSteve French return -EINVAL; 183338c8a9a5SSteve French } 183438c8a9a5SSteve French 183538c8a9a5SSteve French switch (type) { 183638c8a9a5SSteve French case Kerberos: 183738c8a9a5SSteve French sess_data->func = SMB2_auth_kerberos; 183838c8a9a5SSteve French break; 183938c8a9a5SSteve French case RawNTLMSSP: 184038c8a9a5SSteve French sess_data->func = SMB2_sess_auth_rawntlmssp_negotiate; 184138c8a9a5SSteve French break; 184238c8a9a5SSteve French default: 184338c8a9a5SSteve French cifs_dbg(VFS, "secType %d not supported!\n", type); 184438c8a9a5SSteve French return -EOPNOTSUPP; 184538c8a9a5SSteve French } 184638c8a9a5SSteve French 184738c8a9a5SSteve French return 0; 184838c8a9a5SSteve French } 184938c8a9a5SSteve French 185038c8a9a5SSteve French int 185138c8a9a5SSteve French SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses, 185238c8a9a5SSteve French struct TCP_Server_Info *server, 185338c8a9a5SSteve French const struct nls_table *nls_cp) 185438c8a9a5SSteve French { 185538c8a9a5SSteve French int rc = 0; 185638c8a9a5SSteve French struct SMB2_sess_data *sess_data; 185738c8a9a5SSteve French 185838c8a9a5SSteve French cifs_dbg(FYI, "Session Setup\n"); 185938c8a9a5SSteve French 186038c8a9a5SSteve French if (!server) { 186138c8a9a5SSteve French WARN(1, "%s: server is NULL!\n", __func__); 186238c8a9a5SSteve French return -EIO; 186338c8a9a5SSteve French } 186438c8a9a5SSteve French 186538c8a9a5SSteve French sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL); 186638c8a9a5SSteve French if (!sess_data) 186738c8a9a5SSteve French return -ENOMEM; 186838c8a9a5SSteve French 186938c8a9a5SSteve French sess_data->xid = xid; 187038c8a9a5SSteve French sess_data->ses = ses; 187138c8a9a5SSteve French sess_data->server = server; 187238c8a9a5SSteve French sess_data->buf0_type = CIFS_NO_BUFFER; 187338c8a9a5SSteve French sess_data->nls_cp = (struct nls_table *) nls_cp; 187438c8a9a5SSteve French sess_data->previous_session = ses->Suid; 187538c8a9a5SSteve French 187638c8a9a5SSteve French rc = SMB2_select_sec(sess_data); 187738c8a9a5SSteve French if (rc) 187838c8a9a5SSteve French goto out; 187938c8a9a5SSteve French 188038c8a9a5SSteve French /* 188138c8a9a5SSteve French * Initialize the session hash with the server one. 188238c8a9a5SSteve French */ 188338c8a9a5SSteve French memcpy(ses->preauth_sha_hash, server->preauth_sha_hash, 188438c8a9a5SSteve French SMB2_PREAUTH_HASH_SIZE); 188538c8a9a5SSteve French 188638c8a9a5SSteve French while (sess_data->func) 188738c8a9a5SSteve French sess_data->func(sess_data); 188838c8a9a5SSteve French 188938c8a9a5SSteve French if ((ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) && (ses->sign)) 189038c8a9a5SSteve French cifs_server_dbg(VFS, "signing requested but authenticated as guest\n"); 189138c8a9a5SSteve French rc = sess_data->result; 189238c8a9a5SSteve French out: 189338c8a9a5SSteve French kfree_sensitive(sess_data); 189438c8a9a5SSteve French return rc; 189538c8a9a5SSteve French } 189638c8a9a5SSteve French 189738c8a9a5SSteve French int 189838c8a9a5SSteve French SMB2_logoff(const unsigned int xid, struct cifs_ses *ses) 189938c8a9a5SSteve French { 190038c8a9a5SSteve French struct smb_rqst rqst; 190138c8a9a5SSteve French struct smb2_logoff_req *req; /* response is also trivial struct */ 190238c8a9a5SSteve French int rc = 0; 190338c8a9a5SSteve French struct TCP_Server_Info *server; 190438c8a9a5SSteve French int flags = 0; 190538c8a9a5SSteve French unsigned int total_len; 190638c8a9a5SSteve French struct kvec iov[1]; 190738c8a9a5SSteve French struct kvec rsp_iov; 190838c8a9a5SSteve French int resp_buf_type; 190938c8a9a5SSteve French 191038c8a9a5SSteve French cifs_dbg(FYI, "disconnect session %p\n", ses); 191138c8a9a5SSteve French 191238c8a9a5SSteve French if (ses && (ses->server)) 191338c8a9a5SSteve French server = ses->server; 191438c8a9a5SSteve French else 191538c8a9a5SSteve French return -EIO; 191638c8a9a5SSteve French 191738c8a9a5SSteve French /* no need to send SMB logoff if uid already closed due to reconnect */ 191838c8a9a5SSteve French spin_lock(&ses->chan_lock); 191938c8a9a5SSteve French if (CIFS_ALL_CHANS_NEED_RECONNECT(ses)) { 192038c8a9a5SSteve French spin_unlock(&ses->chan_lock); 192138c8a9a5SSteve French goto smb2_session_already_dead; 192238c8a9a5SSteve French } 192338c8a9a5SSteve French spin_unlock(&ses->chan_lock); 192438c8a9a5SSteve French 192538c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_LOGOFF, NULL, ses->server, 192638c8a9a5SSteve French (void **) &req, &total_len); 192738c8a9a5SSteve French if (rc) 192838c8a9a5SSteve French return rc; 192938c8a9a5SSteve French 193038c8a9a5SSteve French /* since no tcon, smb2_init can not do this, so do here */ 193138c8a9a5SSteve French req->hdr.SessionId = cpu_to_le64(ses->Suid); 193238c8a9a5SSteve French 193338c8a9a5SSteve French if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) 193438c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 193538c8a9a5SSteve French else if (server->sign) 193638c8a9a5SSteve French req->hdr.Flags |= SMB2_FLAGS_SIGNED; 193738c8a9a5SSteve French 193838c8a9a5SSteve French flags |= CIFS_NO_RSP_BUF; 193938c8a9a5SSteve French 194038c8a9a5SSteve French iov[0].iov_base = (char *)req; 194138c8a9a5SSteve French iov[0].iov_len = total_len; 194238c8a9a5SSteve French 194338c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 194438c8a9a5SSteve French rqst.rq_iov = iov; 194538c8a9a5SSteve French rqst.rq_nvec = 1; 194638c8a9a5SSteve French 194738c8a9a5SSteve French rc = cifs_send_recv(xid, ses, ses->server, 194838c8a9a5SSteve French &rqst, &resp_buf_type, flags, &rsp_iov); 194938c8a9a5SSteve French cifs_small_buf_release(req); 195038c8a9a5SSteve French /* 195138c8a9a5SSteve French * No tcon so can't do 195238c8a9a5SSteve French * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); 195338c8a9a5SSteve French */ 195438c8a9a5SSteve French 195538c8a9a5SSteve French smb2_session_already_dead: 195638c8a9a5SSteve French return rc; 195738c8a9a5SSteve French } 195838c8a9a5SSteve French 195938c8a9a5SSteve French static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code) 196038c8a9a5SSteve French { 196138c8a9a5SSteve French cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]); 196238c8a9a5SSteve French } 196338c8a9a5SSteve French 196438c8a9a5SSteve French #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */) 196538c8a9a5SSteve French 196638c8a9a5SSteve French /* These are similar values to what Windows uses */ 196738c8a9a5SSteve French static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon) 196838c8a9a5SSteve French { 196938c8a9a5SSteve French tcon->max_chunks = 256; 197038c8a9a5SSteve French tcon->max_bytes_chunk = 1048576; 197138c8a9a5SSteve French tcon->max_bytes_copy = 16777216; 197238c8a9a5SSteve French } 197338c8a9a5SSteve French 197438c8a9a5SSteve French int 197538c8a9a5SSteve French SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree, 197638c8a9a5SSteve French struct cifs_tcon *tcon, const struct nls_table *cp) 197738c8a9a5SSteve French { 197838c8a9a5SSteve French struct smb_rqst rqst; 197938c8a9a5SSteve French struct smb2_tree_connect_req *req; 198038c8a9a5SSteve French struct smb2_tree_connect_rsp *rsp = NULL; 198138c8a9a5SSteve French struct kvec iov[2]; 198238c8a9a5SSteve French struct kvec rsp_iov = { NULL, 0 }; 198338c8a9a5SSteve French int rc = 0; 198438c8a9a5SSteve French int resp_buftype; 198538c8a9a5SSteve French int unc_path_len; 198638c8a9a5SSteve French __le16 *unc_path = NULL; 198738c8a9a5SSteve French int flags = 0; 198838c8a9a5SSteve French unsigned int total_len; 198938c8a9a5SSteve French struct TCP_Server_Info *server; 199038c8a9a5SSteve French 199138c8a9a5SSteve French /* always use master channel */ 199238c8a9a5SSteve French server = ses->server; 199338c8a9a5SSteve French 199438c8a9a5SSteve French cifs_dbg(FYI, "TCON\n"); 199538c8a9a5SSteve French 199638c8a9a5SSteve French if (!server || !tree) 199738c8a9a5SSteve French return -EIO; 199838c8a9a5SSteve French 199938c8a9a5SSteve French unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL); 200038c8a9a5SSteve French if (unc_path == NULL) 200138c8a9a5SSteve French return -ENOMEM; 200238c8a9a5SSteve French 200338c8a9a5SSteve French unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp); 200438c8a9a5SSteve French if (unc_path_len <= 0) { 200538c8a9a5SSteve French kfree(unc_path); 200638c8a9a5SSteve French return -EINVAL; 200738c8a9a5SSteve French } 200838c8a9a5SSteve French unc_path_len *= 2; 200938c8a9a5SSteve French 201038c8a9a5SSteve French /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */ 201138c8a9a5SSteve French tcon->tid = 0; 201238c8a9a5SSteve French atomic_set(&tcon->num_remote_opens, 0); 201338c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_TREE_CONNECT, tcon, server, 201438c8a9a5SSteve French (void **) &req, &total_len); 201538c8a9a5SSteve French if (rc) { 201638c8a9a5SSteve French kfree(unc_path); 201738c8a9a5SSteve French return rc; 201838c8a9a5SSteve French } 201938c8a9a5SSteve French 202038c8a9a5SSteve French if (smb3_encryption_required(tcon)) 202138c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 202238c8a9a5SSteve French 202338c8a9a5SSteve French iov[0].iov_base = (char *)req; 202438c8a9a5SSteve French /* 1 for pad */ 202538c8a9a5SSteve French iov[0].iov_len = total_len - 1; 202638c8a9a5SSteve French 202738c8a9a5SSteve French /* Testing shows that buffer offset must be at location of Buffer[0] */ 202838c8a9a5SSteve French req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)); 202938c8a9a5SSteve French req->PathLength = cpu_to_le16(unc_path_len); 203038c8a9a5SSteve French iov[1].iov_base = unc_path; 203138c8a9a5SSteve French iov[1].iov_len = unc_path_len; 203238c8a9a5SSteve French 203338c8a9a5SSteve French /* 203438c8a9a5SSteve French * 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1 203538c8a9a5SSteve French * unless it is guest or anonymous user. See MS-SMB2 3.2.5.3.1 203638c8a9a5SSteve French * (Samba servers don't always set the flag so also check if null user) 203738c8a9a5SSteve French */ 203838c8a9a5SSteve French if ((server->dialect == SMB311_PROT_ID) && 203938c8a9a5SSteve French !smb3_encryption_required(tcon) && 204038c8a9a5SSteve French !(ses->session_flags & 204138c8a9a5SSteve French (SMB2_SESSION_FLAG_IS_GUEST|SMB2_SESSION_FLAG_IS_NULL)) && 204238c8a9a5SSteve French ((ses->user_name != NULL) || (ses->sectype == Kerberos))) 204338c8a9a5SSteve French req->hdr.Flags |= SMB2_FLAGS_SIGNED; 204438c8a9a5SSteve French 204538c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 204638c8a9a5SSteve French rqst.rq_iov = iov; 204738c8a9a5SSteve French rqst.rq_nvec = 2; 204838c8a9a5SSteve French 204938c8a9a5SSteve French /* Need 64 for max size write so ask for more in case not there yet */ 20505e90aa21SShyam Prasad N if (server->credits >= server->max_credits) 20515e90aa21SShyam Prasad N req->hdr.CreditRequest = cpu_to_le16(0); 20525e90aa21SShyam Prasad N else 20535e90aa21SShyam Prasad N req->hdr.CreditRequest = cpu_to_le16( 20545e90aa21SShyam Prasad N min_t(int, server->max_credits - 20555e90aa21SShyam Prasad N server->credits, 64)); 205638c8a9a5SSteve French 205738c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 205838c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 205938c8a9a5SSteve French cifs_small_buf_release(req); 206038c8a9a5SSteve French rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base; 206138c8a9a5SSteve French trace_smb3_tcon(xid, tcon->tid, ses->Suid, tree, rc); 206238c8a9a5SSteve French if ((rc != 0) || (rsp == NULL)) { 206338c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE); 206438c8a9a5SSteve French tcon->need_reconnect = true; 206538c8a9a5SSteve French goto tcon_error_exit; 206638c8a9a5SSteve French } 206738c8a9a5SSteve French 206838c8a9a5SSteve French switch (rsp->ShareType) { 206938c8a9a5SSteve French case SMB2_SHARE_TYPE_DISK: 207038c8a9a5SSteve French cifs_dbg(FYI, "connection to disk share\n"); 207138c8a9a5SSteve French break; 207238c8a9a5SSteve French case SMB2_SHARE_TYPE_PIPE: 207338c8a9a5SSteve French tcon->pipe = true; 207438c8a9a5SSteve French cifs_dbg(FYI, "connection to pipe share\n"); 207538c8a9a5SSteve French break; 207638c8a9a5SSteve French case SMB2_SHARE_TYPE_PRINT: 207738c8a9a5SSteve French tcon->print = true; 207838c8a9a5SSteve French cifs_dbg(FYI, "connection to printer\n"); 207938c8a9a5SSteve French break; 208038c8a9a5SSteve French default: 208138c8a9a5SSteve French cifs_server_dbg(VFS, "unknown share type %d\n", rsp->ShareType); 208238c8a9a5SSteve French rc = -EOPNOTSUPP; 208338c8a9a5SSteve French goto tcon_error_exit; 208438c8a9a5SSteve French } 208538c8a9a5SSteve French 208638c8a9a5SSteve French tcon->share_flags = le32_to_cpu(rsp->ShareFlags); 208738c8a9a5SSteve French tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */ 208838c8a9a5SSteve French tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess); 208938c8a9a5SSteve French tcon->tid = le32_to_cpu(rsp->hdr.Id.SyncId.TreeId); 209038c8a9a5SSteve French strscpy(tcon->tree_name, tree, sizeof(tcon->tree_name)); 209138c8a9a5SSteve French 209238c8a9a5SSteve French if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) && 209338c8a9a5SSteve French ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0)) 209438c8a9a5SSteve French cifs_tcon_dbg(VFS, "DFS capability contradicts DFS flag\n"); 209538c8a9a5SSteve French 209638c8a9a5SSteve French if (tcon->seal && 209738c8a9a5SSteve French !(server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION)) 209838c8a9a5SSteve French cifs_tcon_dbg(VFS, "Encryption is requested but not supported\n"); 209938c8a9a5SSteve French 210038c8a9a5SSteve French init_copy_chunk_defaults(tcon); 210138c8a9a5SSteve French if (server->ops->validate_negotiate) 210238c8a9a5SSteve French rc = server->ops->validate_negotiate(xid, tcon); 210338c8a9a5SSteve French if (rc == 0) /* See MS-SMB2 2.2.10 and 3.2.5.5 */ 210438c8a9a5SSteve French if (tcon->share_flags & SMB2_SHAREFLAG_ISOLATED_TRANSPORT) 210538c8a9a5SSteve French server->nosharesock = true; 210638c8a9a5SSteve French tcon_exit: 210738c8a9a5SSteve French 210838c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp); 210938c8a9a5SSteve French kfree(unc_path); 211038c8a9a5SSteve French return rc; 211138c8a9a5SSteve French 211238c8a9a5SSteve French tcon_error_exit: 211338c8a9a5SSteve French if (rsp && rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) 211438c8a9a5SSteve French cifs_tcon_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree); 211538c8a9a5SSteve French goto tcon_exit; 211638c8a9a5SSteve French } 211738c8a9a5SSteve French 211838c8a9a5SSteve French int 211938c8a9a5SSteve French SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon) 212038c8a9a5SSteve French { 212138c8a9a5SSteve French struct smb_rqst rqst; 212238c8a9a5SSteve French struct smb2_tree_disconnect_req *req; /* response is trivial */ 212338c8a9a5SSteve French int rc = 0; 212438c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 212538c8a9a5SSteve French int flags = 0; 212638c8a9a5SSteve French unsigned int total_len; 212738c8a9a5SSteve French struct kvec iov[1]; 212838c8a9a5SSteve French struct kvec rsp_iov; 212938c8a9a5SSteve French int resp_buf_type; 213038c8a9a5SSteve French 213138c8a9a5SSteve French cifs_dbg(FYI, "Tree Disconnect\n"); 213238c8a9a5SSteve French 213338c8a9a5SSteve French if (!ses || !(ses->server)) 213438c8a9a5SSteve French return -EIO; 213538c8a9a5SSteve French 213638c8a9a5SSteve French trace_smb3_tdis_enter(xid, tcon->tid, ses->Suid, tcon->tree_name); 213738c8a9a5SSteve French spin_lock(&ses->chan_lock); 213838c8a9a5SSteve French if ((tcon->need_reconnect) || 213938c8a9a5SSteve French (CIFS_ALL_CHANS_NEED_RECONNECT(tcon->ses))) { 214038c8a9a5SSteve French spin_unlock(&ses->chan_lock); 214138c8a9a5SSteve French return 0; 214238c8a9a5SSteve French } 214338c8a9a5SSteve French spin_unlock(&ses->chan_lock); 214438c8a9a5SSteve French 214538c8a9a5SSteve French invalidate_all_cached_dirs(tcon); 214638c8a9a5SSteve French 214738c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_TREE_DISCONNECT, tcon, ses->server, 214838c8a9a5SSteve French (void **) &req, 214938c8a9a5SSteve French &total_len); 215038c8a9a5SSteve French if (rc) 215138c8a9a5SSteve French return rc; 215238c8a9a5SSteve French 215338c8a9a5SSteve French if (smb3_encryption_required(tcon)) 215438c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 215538c8a9a5SSteve French 215638c8a9a5SSteve French flags |= CIFS_NO_RSP_BUF; 215738c8a9a5SSteve French 215838c8a9a5SSteve French iov[0].iov_base = (char *)req; 215938c8a9a5SSteve French iov[0].iov_len = total_len; 216038c8a9a5SSteve French 216138c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 216238c8a9a5SSteve French rqst.rq_iov = iov; 216338c8a9a5SSteve French rqst.rq_nvec = 1; 216438c8a9a5SSteve French 216538c8a9a5SSteve French rc = cifs_send_recv(xid, ses, ses->server, 216638c8a9a5SSteve French &rqst, &resp_buf_type, flags, &rsp_iov); 216738c8a9a5SSteve French cifs_small_buf_release(req); 216838c8a9a5SSteve French if (rc) { 216938c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE); 217038c8a9a5SSteve French trace_smb3_tdis_err(xid, tcon->tid, ses->Suid, rc); 217138c8a9a5SSteve French } 217238c8a9a5SSteve French trace_smb3_tdis_done(xid, tcon->tid, ses->Suid); 217338c8a9a5SSteve French 217438c8a9a5SSteve French return rc; 217538c8a9a5SSteve French } 217638c8a9a5SSteve French 217738c8a9a5SSteve French 217838c8a9a5SSteve French static struct create_durable * 217938c8a9a5SSteve French create_durable_buf(void) 218038c8a9a5SSteve French { 218138c8a9a5SSteve French struct create_durable *buf; 218238c8a9a5SSteve French 218338c8a9a5SSteve French buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL); 218438c8a9a5SSteve French if (!buf) 218538c8a9a5SSteve French return NULL; 218638c8a9a5SSteve French 218738c8a9a5SSteve French buf->ccontext.DataOffset = cpu_to_le16(offsetof 218838c8a9a5SSteve French (struct create_durable, Data)); 218938c8a9a5SSteve French buf->ccontext.DataLength = cpu_to_le32(16); 219038c8a9a5SSteve French buf->ccontext.NameOffset = cpu_to_le16(offsetof 219138c8a9a5SSteve French (struct create_durable, Name)); 219238c8a9a5SSteve French buf->ccontext.NameLength = cpu_to_le16(4); 219338c8a9a5SSteve French /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */ 219438c8a9a5SSteve French buf->Name[0] = 'D'; 219538c8a9a5SSteve French buf->Name[1] = 'H'; 219638c8a9a5SSteve French buf->Name[2] = 'n'; 219738c8a9a5SSteve French buf->Name[3] = 'Q'; 219838c8a9a5SSteve French return buf; 219938c8a9a5SSteve French } 220038c8a9a5SSteve French 220138c8a9a5SSteve French static struct create_durable * 220238c8a9a5SSteve French create_reconnect_durable_buf(struct cifs_fid *fid) 220338c8a9a5SSteve French { 220438c8a9a5SSteve French struct create_durable *buf; 220538c8a9a5SSteve French 220638c8a9a5SSteve French buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL); 220738c8a9a5SSteve French if (!buf) 220838c8a9a5SSteve French return NULL; 220938c8a9a5SSteve French 221038c8a9a5SSteve French buf->ccontext.DataOffset = cpu_to_le16(offsetof 221138c8a9a5SSteve French (struct create_durable, Data)); 221238c8a9a5SSteve French buf->ccontext.DataLength = cpu_to_le32(16); 221338c8a9a5SSteve French buf->ccontext.NameOffset = cpu_to_le16(offsetof 221438c8a9a5SSteve French (struct create_durable, Name)); 221538c8a9a5SSteve French buf->ccontext.NameLength = cpu_to_le16(4); 221638c8a9a5SSteve French buf->Data.Fid.PersistentFileId = fid->persistent_fid; 221738c8a9a5SSteve French buf->Data.Fid.VolatileFileId = fid->volatile_fid; 221838c8a9a5SSteve French /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */ 221938c8a9a5SSteve French buf->Name[0] = 'D'; 222038c8a9a5SSteve French buf->Name[1] = 'H'; 222138c8a9a5SSteve French buf->Name[2] = 'n'; 222238c8a9a5SSteve French buf->Name[3] = 'C'; 222338c8a9a5SSteve French return buf; 222438c8a9a5SSteve French } 222538c8a9a5SSteve French 222638c8a9a5SSteve French static void 222738c8a9a5SSteve French parse_query_id_ctxt(struct create_context *cc, struct smb2_file_all_info *buf) 222838c8a9a5SSteve French { 222938c8a9a5SSteve French struct create_disk_id_rsp *pdisk_id = (struct create_disk_id_rsp *)cc; 223038c8a9a5SSteve French 223138c8a9a5SSteve French cifs_dbg(FYI, "parse query id context 0x%llx 0x%llx\n", 223238c8a9a5SSteve French pdisk_id->DiskFileId, pdisk_id->VolumeId); 223338c8a9a5SSteve French buf->IndexNumber = pdisk_id->DiskFileId; 223438c8a9a5SSteve French } 223538c8a9a5SSteve French 223638c8a9a5SSteve French static void 223738c8a9a5SSteve French parse_posix_ctxt(struct create_context *cc, struct smb2_file_all_info *info, 223838c8a9a5SSteve French struct create_posix_rsp *posix) 223938c8a9a5SSteve French { 224038c8a9a5SSteve French int sid_len; 224138c8a9a5SSteve French u8 *beg = (u8 *)cc + le16_to_cpu(cc->DataOffset); 224238c8a9a5SSteve French u8 *end = beg + le32_to_cpu(cc->DataLength); 224338c8a9a5SSteve French u8 *sid; 224438c8a9a5SSteve French 224538c8a9a5SSteve French memset(posix, 0, sizeof(*posix)); 224638c8a9a5SSteve French 224738c8a9a5SSteve French posix->nlink = le32_to_cpu(*(__le32 *)(beg + 0)); 224838c8a9a5SSteve French posix->reparse_tag = le32_to_cpu(*(__le32 *)(beg + 4)); 224938c8a9a5SSteve French posix->mode = le32_to_cpu(*(__le32 *)(beg + 8)); 225038c8a9a5SSteve French 225138c8a9a5SSteve French sid = beg + 12; 225238c8a9a5SSteve French sid_len = posix_info_sid_size(sid, end); 225338c8a9a5SSteve French if (sid_len < 0) { 225438c8a9a5SSteve French cifs_dbg(VFS, "bad owner sid in posix create response\n"); 225538c8a9a5SSteve French return; 225638c8a9a5SSteve French } 225738c8a9a5SSteve French memcpy(&posix->owner, sid, sid_len); 225838c8a9a5SSteve French 225938c8a9a5SSteve French sid = sid + sid_len; 226038c8a9a5SSteve French sid_len = posix_info_sid_size(sid, end); 226138c8a9a5SSteve French if (sid_len < 0) { 226238c8a9a5SSteve French cifs_dbg(VFS, "bad group sid in posix create response\n"); 226338c8a9a5SSteve French return; 226438c8a9a5SSteve French } 226538c8a9a5SSteve French memcpy(&posix->group, sid, sid_len); 226638c8a9a5SSteve French 226738c8a9a5SSteve French cifs_dbg(FYI, "nlink=%d mode=%o reparse_tag=%x\n", 226838c8a9a5SSteve French posix->nlink, posix->mode, posix->reparse_tag); 226938c8a9a5SSteve French } 227038c8a9a5SSteve French 227117a0f64cSPaulo Alcantara int smb2_parse_contexts(struct TCP_Server_Info *server, 227217a0f64cSPaulo Alcantara struct kvec *rsp_iov, 227317a0f64cSPaulo Alcantara unsigned int *epoch, 227417a0f64cSPaulo Alcantara char *lease_key, __u8 *oplock, 227538c8a9a5SSteve French struct smb2_file_all_info *buf, 227638c8a9a5SSteve French struct create_posix_rsp *posix) 227738c8a9a5SSteve French { 227817a0f64cSPaulo Alcantara struct smb2_create_rsp *rsp = rsp_iov->iov_base; 227938c8a9a5SSteve French struct create_context *cc; 228017a0f64cSPaulo Alcantara size_t rem, off, len; 228117a0f64cSPaulo Alcantara size_t doff, dlen; 228217a0f64cSPaulo Alcantara size_t noff, nlen; 228338c8a9a5SSteve French char *name; 228438c8a9a5SSteve French static const char smb3_create_tag_posix[] = { 228538c8a9a5SSteve French 0x93, 0xAD, 0x25, 0x50, 0x9C, 228638c8a9a5SSteve French 0xB4, 0x11, 0xE7, 0xB4, 0x23, 0x83, 228738c8a9a5SSteve French 0xDE, 0x96, 0x8B, 0xCD, 0x7C 228838c8a9a5SSteve French }; 228938c8a9a5SSteve French 229038c8a9a5SSteve French *oplock = 0; 229117a0f64cSPaulo Alcantara 229217a0f64cSPaulo Alcantara off = le32_to_cpu(rsp->CreateContextsOffset); 229317a0f64cSPaulo Alcantara rem = le32_to_cpu(rsp->CreateContextsLength); 229417a0f64cSPaulo Alcantara if (check_add_overflow(off, rem, &len) || len > rsp_iov->iov_len) 229517a0f64cSPaulo Alcantara return -EINVAL; 229617a0f64cSPaulo Alcantara cc = (struct create_context *)((u8 *)rsp + off); 229738c8a9a5SSteve French 229838c8a9a5SSteve French /* Initialize inode number to 0 in case no valid data in qfid context */ 229938c8a9a5SSteve French if (buf) 230038c8a9a5SSteve French buf->IndexNumber = 0; 230138c8a9a5SSteve French 230217a0f64cSPaulo Alcantara while (rem >= sizeof(*cc)) { 230317a0f64cSPaulo Alcantara doff = le16_to_cpu(cc->DataOffset); 230417a0f64cSPaulo Alcantara dlen = le32_to_cpu(cc->DataLength); 230517a0f64cSPaulo Alcantara if (check_add_overflow(doff, dlen, &len) || len > rem) 230617a0f64cSPaulo Alcantara return -EINVAL; 230717a0f64cSPaulo Alcantara 230817a0f64cSPaulo Alcantara noff = le16_to_cpu(cc->NameOffset); 230917a0f64cSPaulo Alcantara nlen = le16_to_cpu(cc->NameLength); 231038298acbSPaulo Alcantara if (noff + nlen > doff) 231117a0f64cSPaulo Alcantara return -EINVAL; 231217a0f64cSPaulo Alcantara 231317a0f64cSPaulo Alcantara name = (char *)cc + noff; 231417a0f64cSPaulo Alcantara switch (nlen) { 231517a0f64cSPaulo Alcantara case 4: 231617a0f64cSPaulo Alcantara if (!strncmp(name, SMB2_CREATE_REQUEST_LEASE, 4)) { 231738c8a9a5SSteve French *oplock = server->ops->parse_lease_buf(cc, epoch, 231838c8a9a5SSteve French lease_key); 231917a0f64cSPaulo Alcantara } else if (buf && 232017a0f64cSPaulo Alcantara !strncmp(name, SMB2_CREATE_QUERY_ON_DISK_ID, 4)) { 232138c8a9a5SSteve French parse_query_id_ctxt(cc, buf); 232238c8a9a5SSteve French } 232338c8a9a5SSteve French break; 232417a0f64cSPaulo Alcantara case 16: 232517a0f64cSPaulo Alcantara if (posix && !memcmp(name, smb3_create_tag_posix, 16)) 232617a0f64cSPaulo Alcantara parse_posix_ctxt(cc, buf, posix); 232717a0f64cSPaulo Alcantara break; 232817a0f64cSPaulo Alcantara default: 232917a0f64cSPaulo Alcantara cifs_dbg(FYI, "%s: unhandled context (nlen=%zu dlen=%zu)\n", 233017a0f64cSPaulo Alcantara __func__, nlen, dlen); 233117a0f64cSPaulo Alcantara if (IS_ENABLED(CONFIG_CIFS_DEBUG2)) 233217a0f64cSPaulo Alcantara cifs_dump_mem("context data: ", cc, dlen); 233317a0f64cSPaulo Alcantara break; 233417a0f64cSPaulo Alcantara } 233517a0f64cSPaulo Alcantara 233617a0f64cSPaulo Alcantara off = le32_to_cpu(cc->Next); 233717a0f64cSPaulo Alcantara if (!off) 233817a0f64cSPaulo Alcantara break; 233917a0f64cSPaulo Alcantara if (check_sub_overflow(rem, off, &rem)) 234017a0f64cSPaulo Alcantara return -EINVAL; 234117a0f64cSPaulo Alcantara cc = (struct create_context *)((u8 *)cc + off); 234238c8a9a5SSteve French } 234338c8a9a5SSteve French 234438c8a9a5SSteve French if (rsp->OplockLevel != SMB2_OPLOCK_LEVEL_LEASE) 234538c8a9a5SSteve French *oplock = rsp->OplockLevel; 234638c8a9a5SSteve French 234717a0f64cSPaulo Alcantara return 0; 234838c8a9a5SSteve French } 234938c8a9a5SSteve French 235038c8a9a5SSteve French static int 235138c8a9a5SSteve French add_lease_context(struct TCP_Server_Info *server, 235238c8a9a5SSteve French struct smb2_create_req *req, 235338c8a9a5SSteve French struct kvec *iov, 235438c8a9a5SSteve French unsigned int *num_iovec, u8 *lease_key, __u8 *oplock) 235538c8a9a5SSteve French { 235638c8a9a5SSteve French unsigned int num = *num_iovec; 235738c8a9a5SSteve French 235838c8a9a5SSteve French iov[num].iov_base = server->ops->create_lease_buf(lease_key, *oplock); 235938c8a9a5SSteve French if (iov[num].iov_base == NULL) 236038c8a9a5SSteve French return -ENOMEM; 236138c8a9a5SSteve French iov[num].iov_len = server->vals->create_lease_size; 236238c8a9a5SSteve French req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE; 236338c8a9a5SSteve French *num_iovec = num + 1; 236438c8a9a5SSteve French return 0; 236538c8a9a5SSteve French } 236638c8a9a5SSteve French 236738c8a9a5SSteve French static struct create_durable_v2 * 236838c8a9a5SSteve French create_durable_v2_buf(struct cifs_open_parms *oparms) 236938c8a9a5SSteve French { 237038c8a9a5SSteve French struct cifs_fid *pfid = oparms->fid; 237138c8a9a5SSteve French struct create_durable_v2 *buf; 237238c8a9a5SSteve French 237338c8a9a5SSteve French buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL); 237438c8a9a5SSteve French if (!buf) 237538c8a9a5SSteve French return NULL; 237638c8a9a5SSteve French 237738c8a9a5SSteve French buf->ccontext.DataOffset = cpu_to_le16(offsetof 237838c8a9a5SSteve French (struct create_durable_v2, dcontext)); 237938c8a9a5SSteve French buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2)); 238038c8a9a5SSteve French buf->ccontext.NameOffset = cpu_to_le16(offsetof 238138c8a9a5SSteve French (struct create_durable_v2, Name)); 238238c8a9a5SSteve French buf->ccontext.NameLength = cpu_to_le16(4); 238338c8a9a5SSteve French 238438c8a9a5SSteve French /* 238538c8a9a5SSteve French * NB: Handle timeout defaults to 0, which allows server to choose 238638c8a9a5SSteve French * (most servers default to 120 seconds) and most clients default to 0. 238738c8a9a5SSteve French * This can be overridden at mount ("handletimeout=") if the user wants 238838c8a9a5SSteve French * a different persistent (or resilient) handle timeout for all opens 23892c75426cSSteve French * on a particular SMB3 mount. 239038c8a9a5SSteve French */ 239138c8a9a5SSteve French buf->dcontext.Timeout = cpu_to_le32(oparms->tcon->handle_timeout); 239238c8a9a5SSteve French buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT); 239338c8a9a5SSteve French generate_random_uuid(buf->dcontext.CreateGuid); 239438c8a9a5SSteve French memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16); 239538c8a9a5SSteve French 239638c8a9a5SSteve French /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */ 239738c8a9a5SSteve French buf->Name[0] = 'D'; 239838c8a9a5SSteve French buf->Name[1] = 'H'; 239938c8a9a5SSteve French buf->Name[2] = '2'; 240038c8a9a5SSteve French buf->Name[3] = 'Q'; 240138c8a9a5SSteve French return buf; 240238c8a9a5SSteve French } 240338c8a9a5SSteve French 240438c8a9a5SSteve French static struct create_durable_handle_reconnect_v2 * 240538c8a9a5SSteve French create_reconnect_durable_v2_buf(struct cifs_fid *fid) 240638c8a9a5SSteve French { 240738c8a9a5SSteve French struct create_durable_handle_reconnect_v2 *buf; 240838c8a9a5SSteve French 240938c8a9a5SSteve French buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2), 241038c8a9a5SSteve French GFP_KERNEL); 241138c8a9a5SSteve French if (!buf) 241238c8a9a5SSteve French return NULL; 241338c8a9a5SSteve French 241438c8a9a5SSteve French buf->ccontext.DataOffset = 241538c8a9a5SSteve French cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2, 241638c8a9a5SSteve French dcontext)); 241738c8a9a5SSteve French buf->ccontext.DataLength = 241838c8a9a5SSteve French cpu_to_le32(sizeof(struct durable_reconnect_context_v2)); 241938c8a9a5SSteve French buf->ccontext.NameOffset = 242038c8a9a5SSteve French cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2, 242138c8a9a5SSteve French Name)); 242238c8a9a5SSteve French buf->ccontext.NameLength = cpu_to_le16(4); 242338c8a9a5SSteve French 242438c8a9a5SSteve French buf->dcontext.Fid.PersistentFileId = fid->persistent_fid; 242538c8a9a5SSteve French buf->dcontext.Fid.VolatileFileId = fid->volatile_fid; 242638c8a9a5SSteve French buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT); 242738c8a9a5SSteve French memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16); 242838c8a9a5SSteve French 242938c8a9a5SSteve French /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */ 243038c8a9a5SSteve French buf->Name[0] = 'D'; 243138c8a9a5SSteve French buf->Name[1] = 'H'; 243238c8a9a5SSteve French buf->Name[2] = '2'; 243338c8a9a5SSteve French buf->Name[3] = 'C'; 243438c8a9a5SSteve French return buf; 243538c8a9a5SSteve French } 243638c8a9a5SSteve French 243738c8a9a5SSteve French static int 243838c8a9a5SSteve French add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec, 243938c8a9a5SSteve French struct cifs_open_parms *oparms) 244038c8a9a5SSteve French { 244138c8a9a5SSteve French unsigned int num = *num_iovec; 244238c8a9a5SSteve French 244338c8a9a5SSteve French iov[num].iov_base = create_durable_v2_buf(oparms); 244438c8a9a5SSteve French if (iov[num].iov_base == NULL) 244538c8a9a5SSteve French return -ENOMEM; 244638c8a9a5SSteve French iov[num].iov_len = sizeof(struct create_durable_v2); 244738c8a9a5SSteve French *num_iovec = num + 1; 244838c8a9a5SSteve French return 0; 244938c8a9a5SSteve French } 245038c8a9a5SSteve French 245138c8a9a5SSteve French static int 245238c8a9a5SSteve French add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec, 245338c8a9a5SSteve French struct cifs_open_parms *oparms) 245438c8a9a5SSteve French { 245538c8a9a5SSteve French unsigned int num = *num_iovec; 245638c8a9a5SSteve French 245738c8a9a5SSteve French /* indicate that we don't need to relock the file */ 245838c8a9a5SSteve French oparms->reconnect = false; 245938c8a9a5SSteve French 246038c8a9a5SSteve French iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid); 246138c8a9a5SSteve French if (iov[num].iov_base == NULL) 246238c8a9a5SSteve French return -ENOMEM; 246338c8a9a5SSteve French iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2); 246438c8a9a5SSteve French *num_iovec = num + 1; 246538c8a9a5SSteve French return 0; 246638c8a9a5SSteve French } 246738c8a9a5SSteve French 246838c8a9a5SSteve French static int 246938c8a9a5SSteve French add_durable_context(struct kvec *iov, unsigned int *num_iovec, 247038c8a9a5SSteve French struct cifs_open_parms *oparms, bool use_persistent) 247138c8a9a5SSteve French { 247238c8a9a5SSteve French unsigned int num = *num_iovec; 247338c8a9a5SSteve French 247438c8a9a5SSteve French if (use_persistent) { 247538c8a9a5SSteve French if (oparms->reconnect) 247638c8a9a5SSteve French return add_durable_reconnect_v2_context(iov, num_iovec, 247738c8a9a5SSteve French oparms); 247838c8a9a5SSteve French else 247938c8a9a5SSteve French return add_durable_v2_context(iov, num_iovec, oparms); 248038c8a9a5SSteve French } 248138c8a9a5SSteve French 248238c8a9a5SSteve French if (oparms->reconnect) { 248338c8a9a5SSteve French iov[num].iov_base = create_reconnect_durable_buf(oparms->fid); 248438c8a9a5SSteve French /* indicate that we don't need to relock the file */ 248538c8a9a5SSteve French oparms->reconnect = false; 248638c8a9a5SSteve French } else 248738c8a9a5SSteve French iov[num].iov_base = create_durable_buf(); 248838c8a9a5SSteve French if (iov[num].iov_base == NULL) 248938c8a9a5SSteve French return -ENOMEM; 249038c8a9a5SSteve French iov[num].iov_len = sizeof(struct create_durable); 249138c8a9a5SSteve French *num_iovec = num + 1; 249238c8a9a5SSteve French return 0; 249338c8a9a5SSteve French } 249438c8a9a5SSteve French 249538c8a9a5SSteve French /* See MS-SMB2 2.2.13.2.7 */ 249638c8a9a5SSteve French static struct crt_twarp_ctxt * 249738c8a9a5SSteve French create_twarp_buf(__u64 timewarp) 249838c8a9a5SSteve French { 249938c8a9a5SSteve French struct crt_twarp_ctxt *buf; 250038c8a9a5SSteve French 250138c8a9a5SSteve French buf = kzalloc(sizeof(struct crt_twarp_ctxt), GFP_KERNEL); 250238c8a9a5SSteve French if (!buf) 250338c8a9a5SSteve French return NULL; 250438c8a9a5SSteve French 250538c8a9a5SSteve French buf->ccontext.DataOffset = cpu_to_le16(offsetof 250638c8a9a5SSteve French (struct crt_twarp_ctxt, Timestamp)); 250738c8a9a5SSteve French buf->ccontext.DataLength = cpu_to_le32(8); 250838c8a9a5SSteve French buf->ccontext.NameOffset = cpu_to_le16(offsetof 250938c8a9a5SSteve French (struct crt_twarp_ctxt, Name)); 251038c8a9a5SSteve French buf->ccontext.NameLength = cpu_to_le16(4); 251138c8a9a5SSteve French /* SMB2_CREATE_TIMEWARP_TOKEN is "TWrp" */ 251238c8a9a5SSteve French buf->Name[0] = 'T'; 251338c8a9a5SSteve French buf->Name[1] = 'W'; 251438c8a9a5SSteve French buf->Name[2] = 'r'; 251538c8a9a5SSteve French buf->Name[3] = 'p'; 251638c8a9a5SSteve French buf->Timestamp = cpu_to_le64(timewarp); 251738c8a9a5SSteve French return buf; 251838c8a9a5SSteve French } 251938c8a9a5SSteve French 252038c8a9a5SSteve French /* See MS-SMB2 2.2.13.2.7 */ 252138c8a9a5SSteve French static int 252238c8a9a5SSteve French add_twarp_context(struct kvec *iov, unsigned int *num_iovec, __u64 timewarp) 252338c8a9a5SSteve French { 252438c8a9a5SSteve French unsigned int num = *num_iovec; 252538c8a9a5SSteve French 252638c8a9a5SSteve French iov[num].iov_base = create_twarp_buf(timewarp); 252738c8a9a5SSteve French if (iov[num].iov_base == NULL) 252838c8a9a5SSteve French return -ENOMEM; 252938c8a9a5SSteve French iov[num].iov_len = sizeof(struct crt_twarp_ctxt); 253038c8a9a5SSteve French *num_iovec = num + 1; 253138c8a9a5SSteve French return 0; 253238c8a9a5SSteve French } 253338c8a9a5SSteve French 25342c75426cSSteve French /* See http://technet.microsoft.com/en-us/library/hh509017(v=ws.10).aspx */ 253538c8a9a5SSteve French static void setup_owner_group_sids(char *buf) 253638c8a9a5SSteve French { 253738c8a9a5SSteve French struct owner_group_sids *sids = (struct owner_group_sids *)buf; 253838c8a9a5SSteve French 253938c8a9a5SSteve French /* Populate the user ownership fields S-1-5-88-1 */ 254038c8a9a5SSteve French sids->owner.Revision = 1; 254138c8a9a5SSteve French sids->owner.NumAuth = 3; 254238c8a9a5SSteve French sids->owner.Authority[5] = 5; 254338c8a9a5SSteve French sids->owner.SubAuthorities[0] = cpu_to_le32(88); 254438c8a9a5SSteve French sids->owner.SubAuthorities[1] = cpu_to_le32(1); 254538c8a9a5SSteve French sids->owner.SubAuthorities[2] = cpu_to_le32(current_fsuid().val); 254638c8a9a5SSteve French 254738c8a9a5SSteve French /* Populate the group ownership fields S-1-5-88-2 */ 254838c8a9a5SSteve French sids->group.Revision = 1; 254938c8a9a5SSteve French sids->group.NumAuth = 3; 255038c8a9a5SSteve French sids->group.Authority[5] = 5; 255138c8a9a5SSteve French sids->group.SubAuthorities[0] = cpu_to_le32(88); 255238c8a9a5SSteve French sids->group.SubAuthorities[1] = cpu_to_le32(2); 255338c8a9a5SSteve French sids->group.SubAuthorities[2] = cpu_to_le32(current_fsgid().val); 255438c8a9a5SSteve French 255538c8a9a5SSteve French cifs_dbg(FYI, "owner S-1-5-88-1-%d, group S-1-5-88-2-%d\n", current_fsuid().val, current_fsgid().val); 255638c8a9a5SSteve French } 255738c8a9a5SSteve French 255838c8a9a5SSteve French /* See MS-SMB2 2.2.13.2.2 and MS-DTYP 2.4.6 */ 255938c8a9a5SSteve French static struct crt_sd_ctxt * 256038c8a9a5SSteve French create_sd_buf(umode_t mode, bool set_owner, unsigned int *len) 256138c8a9a5SSteve French { 256238c8a9a5SSteve French struct crt_sd_ctxt *buf; 256338c8a9a5SSteve French __u8 *ptr, *aclptr; 256438c8a9a5SSteve French unsigned int acelen, acl_size, ace_count; 256538c8a9a5SSteve French unsigned int owner_offset = 0; 256638c8a9a5SSteve French unsigned int group_offset = 0; 256738c8a9a5SSteve French struct smb3_acl acl = {}; 256838c8a9a5SSteve French 256938c8a9a5SSteve French *len = round_up(sizeof(struct crt_sd_ctxt) + (sizeof(struct cifs_ace) * 4), 8); 257038c8a9a5SSteve French 257138c8a9a5SSteve French if (set_owner) { 257238c8a9a5SSteve French /* sizeof(struct owner_group_sids) is already multiple of 8 so no need to round */ 257338c8a9a5SSteve French *len += sizeof(struct owner_group_sids); 257438c8a9a5SSteve French } 257538c8a9a5SSteve French 257638c8a9a5SSteve French buf = kzalloc(*len, GFP_KERNEL); 257738c8a9a5SSteve French if (buf == NULL) 257838c8a9a5SSteve French return buf; 257938c8a9a5SSteve French 258038c8a9a5SSteve French ptr = (__u8 *)&buf[1]; 258138c8a9a5SSteve French if (set_owner) { 258238c8a9a5SSteve French /* offset fields are from beginning of security descriptor not of create context */ 258338c8a9a5SSteve French owner_offset = ptr - (__u8 *)&buf->sd; 258438c8a9a5SSteve French buf->sd.OffsetOwner = cpu_to_le32(owner_offset); 258538c8a9a5SSteve French group_offset = owner_offset + offsetof(struct owner_group_sids, group); 258638c8a9a5SSteve French buf->sd.OffsetGroup = cpu_to_le32(group_offset); 258738c8a9a5SSteve French 258838c8a9a5SSteve French setup_owner_group_sids(ptr); 258938c8a9a5SSteve French ptr += sizeof(struct owner_group_sids); 259038c8a9a5SSteve French } else { 259138c8a9a5SSteve French buf->sd.OffsetOwner = 0; 259238c8a9a5SSteve French buf->sd.OffsetGroup = 0; 259338c8a9a5SSteve French } 259438c8a9a5SSteve French 259538c8a9a5SSteve French buf->ccontext.DataOffset = cpu_to_le16(offsetof(struct crt_sd_ctxt, sd)); 259638c8a9a5SSteve French buf->ccontext.NameOffset = cpu_to_le16(offsetof(struct crt_sd_ctxt, Name)); 259738c8a9a5SSteve French buf->ccontext.NameLength = cpu_to_le16(4); 259838c8a9a5SSteve French /* SMB2_CREATE_SD_BUFFER_TOKEN is "SecD" */ 259938c8a9a5SSteve French buf->Name[0] = 'S'; 260038c8a9a5SSteve French buf->Name[1] = 'e'; 260138c8a9a5SSteve French buf->Name[2] = 'c'; 260238c8a9a5SSteve French buf->Name[3] = 'D'; 260338c8a9a5SSteve French buf->sd.Revision = 1; /* Must be one see MS-DTYP 2.4.6 */ 260438c8a9a5SSteve French 260538c8a9a5SSteve French /* 260638c8a9a5SSteve French * ACL is "self relative" ie ACL is stored in contiguous block of memory 260738c8a9a5SSteve French * and "DP" ie the DACL is present 260838c8a9a5SSteve French */ 260938c8a9a5SSteve French buf->sd.Control = cpu_to_le16(ACL_CONTROL_SR | ACL_CONTROL_DP); 261038c8a9a5SSteve French 261138c8a9a5SSteve French /* offset owner, group and Sbz1 and SACL are all zero */ 261238c8a9a5SSteve French buf->sd.OffsetDacl = cpu_to_le32(ptr - (__u8 *)&buf->sd); 261338c8a9a5SSteve French /* Ship the ACL for now. we will copy it into buf later. */ 261438c8a9a5SSteve French aclptr = ptr; 261538c8a9a5SSteve French ptr += sizeof(struct smb3_acl); 261638c8a9a5SSteve French 261738c8a9a5SSteve French /* create one ACE to hold the mode embedded in reserved special SID */ 261838c8a9a5SSteve French acelen = setup_special_mode_ACE((struct cifs_ace *)ptr, (__u64)mode); 261938c8a9a5SSteve French ptr += acelen; 262038c8a9a5SSteve French acl_size = acelen + sizeof(struct smb3_acl); 262138c8a9a5SSteve French ace_count = 1; 262238c8a9a5SSteve French 262338c8a9a5SSteve French if (set_owner) { 262438c8a9a5SSteve French /* we do not need to reallocate buffer to add the two more ACEs. plenty of space */ 262538c8a9a5SSteve French acelen = setup_special_user_owner_ACE((struct cifs_ace *)ptr); 262638c8a9a5SSteve French ptr += acelen; 262738c8a9a5SSteve French acl_size += acelen; 262838c8a9a5SSteve French ace_count += 1; 262938c8a9a5SSteve French } 263038c8a9a5SSteve French 263138c8a9a5SSteve French /* and one more ACE to allow access for authenticated users */ 263238c8a9a5SSteve French acelen = setup_authusers_ACE((struct cifs_ace *)ptr); 263338c8a9a5SSteve French ptr += acelen; 263438c8a9a5SSteve French acl_size += acelen; 263538c8a9a5SSteve French ace_count += 1; 263638c8a9a5SSteve French 263738c8a9a5SSteve French acl.AclRevision = ACL_REVISION; /* See 2.4.4.1 of MS-DTYP */ 263838c8a9a5SSteve French acl.AclSize = cpu_to_le16(acl_size); 263938c8a9a5SSteve French acl.AceCount = cpu_to_le16(ace_count); 264038c8a9a5SSteve French /* acl.Sbz1 and Sbz2 MBZ so are not set here, but initialized above */ 264138c8a9a5SSteve French memcpy(aclptr, &acl, sizeof(struct smb3_acl)); 264238c8a9a5SSteve French 264338c8a9a5SSteve French buf->ccontext.DataLength = cpu_to_le32(ptr - (__u8 *)&buf->sd); 264438c8a9a5SSteve French *len = round_up((unsigned int)(ptr - (__u8 *)buf), 8); 264538c8a9a5SSteve French 264638c8a9a5SSteve French return buf; 264738c8a9a5SSteve French } 264838c8a9a5SSteve French 264938c8a9a5SSteve French static int 265038c8a9a5SSteve French add_sd_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode, bool set_owner) 265138c8a9a5SSteve French { 265238c8a9a5SSteve French unsigned int num = *num_iovec; 265338c8a9a5SSteve French unsigned int len = 0; 265438c8a9a5SSteve French 265538c8a9a5SSteve French iov[num].iov_base = create_sd_buf(mode, set_owner, &len); 265638c8a9a5SSteve French if (iov[num].iov_base == NULL) 265738c8a9a5SSteve French return -ENOMEM; 265838c8a9a5SSteve French iov[num].iov_len = len; 265938c8a9a5SSteve French *num_iovec = num + 1; 266038c8a9a5SSteve French return 0; 266138c8a9a5SSteve French } 266238c8a9a5SSteve French 266338c8a9a5SSteve French static struct crt_query_id_ctxt * 266438c8a9a5SSteve French create_query_id_buf(void) 266538c8a9a5SSteve French { 266638c8a9a5SSteve French struct crt_query_id_ctxt *buf; 266738c8a9a5SSteve French 266838c8a9a5SSteve French buf = kzalloc(sizeof(struct crt_query_id_ctxt), GFP_KERNEL); 266938c8a9a5SSteve French if (!buf) 267038c8a9a5SSteve French return NULL; 267138c8a9a5SSteve French 267238c8a9a5SSteve French buf->ccontext.DataOffset = cpu_to_le16(0); 267338c8a9a5SSteve French buf->ccontext.DataLength = cpu_to_le32(0); 267438c8a9a5SSteve French buf->ccontext.NameOffset = cpu_to_le16(offsetof 267538c8a9a5SSteve French (struct crt_query_id_ctxt, Name)); 267638c8a9a5SSteve French buf->ccontext.NameLength = cpu_to_le16(4); 267738c8a9a5SSteve French /* SMB2_CREATE_QUERY_ON_DISK_ID is "QFid" */ 267838c8a9a5SSteve French buf->Name[0] = 'Q'; 267938c8a9a5SSteve French buf->Name[1] = 'F'; 268038c8a9a5SSteve French buf->Name[2] = 'i'; 268138c8a9a5SSteve French buf->Name[3] = 'd'; 268238c8a9a5SSteve French return buf; 268338c8a9a5SSteve French } 268438c8a9a5SSteve French 268538c8a9a5SSteve French /* See MS-SMB2 2.2.13.2.9 */ 268638c8a9a5SSteve French static int 268738c8a9a5SSteve French add_query_id_context(struct kvec *iov, unsigned int *num_iovec) 268838c8a9a5SSteve French { 268938c8a9a5SSteve French unsigned int num = *num_iovec; 269038c8a9a5SSteve French 269138c8a9a5SSteve French iov[num].iov_base = create_query_id_buf(); 269238c8a9a5SSteve French if (iov[num].iov_base == NULL) 269338c8a9a5SSteve French return -ENOMEM; 269438c8a9a5SSteve French iov[num].iov_len = sizeof(struct crt_query_id_ctxt); 269538c8a9a5SSteve French *num_iovec = num + 1; 269638c8a9a5SSteve French return 0; 269738c8a9a5SSteve French } 269838c8a9a5SSteve French 269938c8a9a5SSteve French static int 270038c8a9a5SSteve French alloc_path_with_tree_prefix(__le16 **out_path, int *out_size, int *out_len, 270138c8a9a5SSteve French const char *treename, const __le16 *path) 270238c8a9a5SSteve French { 270338c8a9a5SSteve French int treename_len, path_len; 270438c8a9a5SSteve French struct nls_table *cp; 270538c8a9a5SSteve French const __le16 sep[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)}; 270638c8a9a5SSteve French 270738c8a9a5SSteve French /* 270838c8a9a5SSteve French * skip leading "\\" 270938c8a9a5SSteve French */ 271038c8a9a5SSteve French treename_len = strlen(treename); 271138c8a9a5SSteve French if (treename_len < 2 || !(treename[0] == '\\' && treename[1] == '\\')) 271238c8a9a5SSteve French return -EINVAL; 271338c8a9a5SSteve French 271438c8a9a5SSteve French treename += 2; 271538c8a9a5SSteve French treename_len -= 2; 271638c8a9a5SSteve French 271738c8a9a5SSteve French path_len = UniStrnlen((wchar_t *)path, PATH_MAX); 271838c8a9a5SSteve French 271938c8a9a5SSteve French /* make room for one path separator only if @path isn't empty */ 272038c8a9a5SSteve French *out_len = treename_len + (path[0] ? 1 : 0) + path_len; 272138c8a9a5SSteve French 272238c8a9a5SSteve French /* 272338c8a9a5SSteve French * final path needs to be 8-byte aligned as specified in 272438c8a9a5SSteve French * MS-SMB2 2.2.13 SMB2 CREATE Request. 272538c8a9a5SSteve French */ 272638c8a9a5SSteve French *out_size = round_up(*out_len * sizeof(__le16), 8); 272738c8a9a5SSteve French *out_path = kzalloc(*out_size + sizeof(__le16) /* null */, GFP_KERNEL); 272838c8a9a5SSteve French if (!*out_path) 272938c8a9a5SSteve French return -ENOMEM; 273038c8a9a5SSteve French 273138c8a9a5SSteve French cp = load_nls_default(); 273238c8a9a5SSteve French cifs_strtoUTF16(*out_path, treename, treename_len, cp); 273338c8a9a5SSteve French 273438c8a9a5SSteve French /* Do not append the separator if the path is empty */ 273538c8a9a5SSteve French if (path[0] != cpu_to_le16(0x0000)) { 2736de548452SDr. David Alan Gilbert UniStrcat((wchar_t *)*out_path, (wchar_t *)sep); 2737de548452SDr. David Alan Gilbert UniStrcat((wchar_t *)*out_path, (wchar_t *)path); 273838c8a9a5SSteve French } 273938c8a9a5SSteve French 274038c8a9a5SSteve French unload_nls(cp); 274138c8a9a5SSteve French 274238c8a9a5SSteve French return 0; 274338c8a9a5SSteve French } 274438c8a9a5SSteve French 274538c8a9a5SSteve French int smb311_posix_mkdir(const unsigned int xid, struct inode *inode, 274638c8a9a5SSteve French umode_t mode, struct cifs_tcon *tcon, 274738c8a9a5SSteve French const char *full_path, 274838c8a9a5SSteve French struct cifs_sb_info *cifs_sb) 274938c8a9a5SSteve French { 275038c8a9a5SSteve French struct smb_rqst rqst; 275138c8a9a5SSteve French struct smb2_create_req *req; 275238c8a9a5SSteve French struct smb2_create_rsp *rsp = NULL; 275338c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 275438c8a9a5SSteve French struct kvec iov[3]; /* make sure at least one for each open context */ 275538c8a9a5SSteve French struct kvec rsp_iov = {NULL, 0}; 275638c8a9a5SSteve French int resp_buftype; 275738c8a9a5SSteve French int uni_path_len; 275838c8a9a5SSteve French __le16 *copy_path = NULL; 275938c8a9a5SSteve French int copy_size; 276038c8a9a5SSteve French int rc = 0; 276138c8a9a5SSteve French unsigned int n_iov = 2; 276238c8a9a5SSteve French __u32 file_attributes = 0; 276338c8a9a5SSteve French char *pc_buf = NULL; 276438c8a9a5SSteve French int flags = 0; 276538c8a9a5SSteve French unsigned int total_len; 276638c8a9a5SSteve French __le16 *utf16_path = NULL; 276738c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 276838c8a9a5SSteve French 276938c8a9a5SSteve French cifs_dbg(FYI, "mkdir\n"); 277038c8a9a5SSteve French 277138c8a9a5SSteve French /* resource #1: path allocation */ 277238c8a9a5SSteve French utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); 277338c8a9a5SSteve French if (!utf16_path) 277438c8a9a5SSteve French return -ENOMEM; 277538c8a9a5SSteve French 277638c8a9a5SSteve French if (!ses || !server) { 277738c8a9a5SSteve French rc = -EIO; 277838c8a9a5SSteve French goto err_free_path; 277938c8a9a5SSteve French } 278038c8a9a5SSteve French 278138c8a9a5SSteve French /* resource #2: request */ 278238c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_CREATE, tcon, server, 278338c8a9a5SSteve French (void **) &req, &total_len); 278438c8a9a5SSteve French if (rc) 278538c8a9a5SSteve French goto err_free_path; 278638c8a9a5SSteve French 278738c8a9a5SSteve French 278838c8a9a5SSteve French if (smb3_encryption_required(tcon)) 278938c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 279038c8a9a5SSteve French 279138c8a9a5SSteve French req->ImpersonationLevel = IL_IMPERSONATION; 279238c8a9a5SSteve French req->DesiredAccess = cpu_to_le32(FILE_WRITE_ATTRIBUTES); 279338c8a9a5SSteve French /* File attributes ignored on open (used in create though) */ 279438c8a9a5SSteve French req->FileAttributes = cpu_to_le32(file_attributes); 279538c8a9a5SSteve French req->ShareAccess = FILE_SHARE_ALL_LE; 279638c8a9a5SSteve French req->CreateDisposition = cpu_to_le32(FILE_CREATE); 279738c8a9a5SSteve French req->CreateOptions = cpu_to_le32(CREATE_NOT_FILE); 279838c8a9a5SSteve French 279938c8a9a5SSteve French iov[0].iov_base = (char *)req; 280038c8a9a5SSteve French /* -1 since last byte is buf[0] which is sent below (path) */ 280138c8a9a5SSteve French iov[0].iov_len = total_len - 1; 280238c8a9a5SSteve French 280338c8a9a5SSteve French req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req)); 280438c8a9a5SSteve French 280538c8a9a5SSteve French /* [MS-SMB2] 2.2.13 NameOffset: 280638c8a9a5SSteve French * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of 280738c8a9a5SSteve French * the SMB2 header, the file name includes a prefix that will 280838c8a9a5SSteve French * be processed during DFS name normalization as specified in 280938c8a9a5SSteve French * section 3.3.5.9. Otherwise, the file name is relative to 281038c8a9a5SSteve French * the share that is identified by the TreeId in the SMB2 281138c8a9a5SSteve French * header. 281238c8a9a5SSteve French */ 281338c8a9a5SSteve French if (tcon->share_flags & SHI1005_FLAGS_DFS) { 281438c8a9a5SSteve French int name_len; 281538c8a9a5SSteve French 281638c8a9a5SSteve French req->hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS; 281738c8a9a5SSteve French rc = alloc_path_with_tree_prefix(©_path, ©_size, 281838c8a9a5SSteve French &name_len, 281938c8a9a5SSteve French tcon->tree_name, utf16_path); 282038c8a9a5SSteve French if (rc) 282138c8a9a5SSteve French goto err_free_req; 282238c8a9a5SSteve French 282338c8a9a5SSteve French req->NameLength = cpu_to_le16(name_len * 2); 282438c8a9a5SSteve French uni_path_len = copy_size; 282538c8a9a5SSteve French /* free before overwriting resource */ 282638c8a9a5SSteve French kfree(utf16_path); 282738c8a9a5SSteve French utf16_path = copy_path; 282838c8a9a5SSteve French } else { 282938c8a9a5SSteve French uni_path_len = (2 * UniStrnlen((wchar_t *)utf16_path, PATH_MAX)) + 2; 283038c8a9a5SSteve French /* MUST set path len (NameLength) to 0 opening root of share */ 283138c8a9a5SSteve French req->NameLength = cpu_to_le16(uni_path_len - 2); 283238c8a9a5SSteve French if (uni_path_len % 8 != 0) { 283338c8a9a5SSteve French copy_size = roundup(uni_path_len, 8); 283438c8a9a5SSteve French copy_path = kzalloc(copy_size, GFP_KERNEL); 283538c8a9a5SSteve French if (!copy_path) { 283638c8a9a5SSteve French rc = -ENOMEM; 283738c8a9a5SSteve French goto err_free_req; 283838c8a9a5SSteve French } 283938c8a9a5SSteve French memcpy((char *)copy_path, (const char *)utf16_path, 284038c8a9a5SSteve French uni_path_len); 284138c8a9a5SSteve French uni_path_len = copy_size; 284238c8a9a5SSteve French /* free before overwriting resource */ 284338c8a9a5SSteve French kfree(utf16_path); 284438c8a9a5SSteve French utf16_path = copy_path; 284538c8a9a5SSteve French } 284638c8a9a5SSteve French } 284738c8a9a5SSteve French 284838c8a9a5SSteve French iov[1].iov_len = uni_path_len; 284938c8a9a5SSteve French iov[1].iov_base = utf16_path; 285038c8a9a5SSteve French req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_NONE; 285138c8a9a5SSteve French 285238c8a9a5SSteve French if (tcon->posix_extensions) { 285338c8a9a5SSteve French /* resource #3: posix buf */ 285438c8a9a5SSteve French rc = add_posix_context(iov, &n_iov, mode); 285538c8a9a5SSteve French if (rc) 285638c8a9a5SSteve French goto err_free_req; 285738c8a9a5SSteve French req->CreateContextsOffset = cpu_to_le32( 285838c8a9a5SSteve French sizeof(struct smb2_create_req) + 285938c8a9a5SSteve French iov[1].iov_len); 286038c8a9a5SSteve French pc_buf = iov[n_iov-1].iov_base; 286138c8a9a5SSteve French } 286238c8a9a5SSteve French 286338c8a9a5SSteve French 286438c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 286538c8a9a5SSteve French rqst.rq_iov = iov; 286638c8a9a5SSteve French rqst.rq_nvec = n_iov; 286738c8a9a5SSteve French 286838c8a9a5SSteve French /* no need to inc num_remote_opens because we close it just below */ 286938c8a9a5SSteve French trace_smb3_posix_mkdir_enter(xid, tcon->tid, ses->Suid, full_path, CREATE_NOT_FILE, 287038c8a9a5SSteve French FILE_WRITE_ATTRIBUTES); 287138c8a9a5SSteve French /* resource #4: response buffer */ 287238c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 287338c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 287438c8a9a5SSteve French if (rc) { 287538c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_CREATE_HE); 287638c8a9a5SSteve French trace_smb3_posix_mkdir_err(xid, tcon->tid, ses->Suid, 287738c8a9a5SSteve French CREATE_NOT_FILE, 287838c8a9a5SSteve French FILE_WRITE_ATTRIBUTES, rc); 287938c8a9a5SSteve French goto err_free_rsp_buf; 288038c8a9a5SSteve French } 288138c8a9a5SSteve French 288238c8a9a5SSteve French /* 288338c8a9a5SSteve French * Although unlikely to be possible for rsp to be null and rc not set, 288438c8a9a5SSteve French * adding check below is slightly safer long term (and quiets Coverity 288538c8a9a5SSteve French * warning) 288638c8a9a5SSteve French */ 288738c8a9a5SSteve French rsp = (struct smb2_create_rsp *)rsp_iov.iov_base; 288838c8a9a5SSteve French if (rsp == NULL) { 288938c8a9a5SSteve French rc = -EIO; 289038c8a9a5SSteve French kfree(pc_buf); 289138c8a9a5SSteve French goto err_free_req; 289238c8a9a5SSteve French } 289338c8a9a5SSteve French 289438c8a9a5SSteve French trace_smb3_posix_mkdir_done(xid, rsp->PersistentFileId, tcon->tid, ses->Suid, 289538c8a9a5SSteve French CREATE_NOT_FILE, FILE_WRITE_ATTRIBUTES); 289638c8a9a5SSteve French 289738c8a9a5SSteve French SMB2_close(xid, tcon, rsp->PersistentFileId, rsp->VolatileFileId); 289838c8a9a5SSteve French 289938c8a9a5SSteve French /* Eventually save off posix specific response info and timestaps */ 290038c8a9a5SSteve French 290138c8a9a5SSteve French err_free_rsp_buf: 290238c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp); 290338c8a9a5SSteve French kfree(pc_buf); 290438c8a9a5SSteve French err_free_req: 290538c8a9a5SSteve French cifs_small_buf_release(req); 290638c8a9a5SSteve French err_free_path: 290738c8a9a5SSteve French kfree(utf16_path); 290838c8a9a5SSteve French return rc; 290938c8a9a5SSteve French } 291038c8a9a5SSteve French 291138c8a9a5SSteve French int 291238c8a9a5SSteve French SMB2_open_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server, 291338c8a9a5SSteve French struct smb_rqst *rqst, __u8 *oplock, 291438c8a9a5SSteve French struct cifs_open_parms *oparms, __le16 *path) 291538c8a9a5SSteve French { 291638c8a9a5SSteve French struct smb2_create_req *req; 291738c8a9a5SSteve French unsigned int n_iov = 2; 291838c8a9a5SSteve French __u32 file_attributes = 0; 291938c8a9a5SSteve French int copy_size; 292038c8a9a5SSteve French int uni_path_len; 292138c8a9a5SSteve French unsigned int total_len; 292238c8a9a5SSteve French struct kvec *iov = rqst->rq_iov; 292338c8a9a5SSteve French __le16 *copy_path; 292438c8a9a5SSteve French int rc; 292538c8a9a5SSteve French 292638c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_CREATE, tcon, server, 292738c8a9a5SSteve French (void **) &req, &total_len); 292838c8a9a5SSteve French if (rc) 292938c8a9a5SSteve French return rc; 293038c8a9a5SSteve French 293138c8a9a5SSteve French iov[0].iov_base = (char *)req; 293238c8a9a5SSteve French /* -1 since last byte is buf[0] which is sent below (path) */ 293338c8a9a5SSteve French iov[0].iov_len = total_len - 1; 293438c8a9a5SSteve French 293538c8a9a5SSteve French if (oparms->create_options & CREATE_OPTION_READONLY) 293638c8a9a5SSteve French file_attributes |= ATTR_READONLY; 293738c8a9a5SSteve French if (oparms->create_options & CREATE_OPTION_SPECIAL) 293838c8a9a5SSteve French file_attributes |= ATTR_SYSTEM; 293938c8a9a5SSteve French 294038c8a9a5SSteve French req->ImpersonationLevel = IL_IMPERSONATION; 294138c8a9a5SSteve French req->DesiredAccess = cpu_to_le32(oparms->desired_access); 294238c8a9a5SSteve French /* File attributes ignored on open (used in create though) */ 294338c8a9a5SSteve French req->FileAttributes = cpu_to_le32(file_attributes); 294438c8a9a5SSteve French req->ShareAccess = FILE_SHARE_ALL_LE; 294538c8a9a5SSteve French 294638c8a9a5SSteve French req->CreateDisposition = cpu_to_le32(oparms->disposition); 294738c8a9a5SSteve French req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK); 294838c8a9a5SSteve French req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req)); 294938c8a9a5SSteve French 295038c8a9a5SSteve French /* [MS-SMB2] 2.2.13 NameOffset: 295138c8a9a5SSteve French * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of 295238c8a9a5SSteve French * the SMB2 header, the file name includes a prefix that will 295338c8a9a5SSteve French * be processed during DFS name normalization as specified in 295438c8a9a5SSteve French * section 3.3.5.9. Otherwise, the file name is relative to 295538c8a9a5SSteve French * the share that is identified by the TreeId in the SMB2 295638c8a9a5SSteve French * header. 295738c8a9a5SSteve French */ 295838c8a9a5SSteve French if (tcon->share_flags & SHI1005_FLAGS_DFS) { 295938c8a9a5SSteve French int name_len; 296038c8a9a5SSteve French 296138c8a9a5SSteve French req->hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS; 296238c8a9a5SSteve French rc = alloc_path_with_tree_prefix(©_path, ©_size, 296338c8a9a5SSteve French &name_len, 296438c8a9a5SSteve French tcon->tree_name, path); 296538c8a9a5SSteve French if (rc) 296638c8a9a5SSteve French return rc; 296738c8a9a5SSteve French req->NameLength = cpu_to_le16(name_len * 2); 296838c8a9a5SSteve French uni_path_len = copy_size; 296938c8a9a5SSteve French path = copy_path; 297038c8a9a5SSteve French } else { 297138c8a9a5SSteve French uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2; 297238c8a9a5SSteve French /* MUST set path len (NameLength) to 0 opening root of share */ 297338c8a9a5SSteve French req->NameLength = cpu_to_le16(uni_path_len - 2); 297438c8a9a5SSteve French copy_size = round_up(uni_path_len, 8); 297538c8a9a5SSteve French copy_path = kzalloc(copy_size, GFP_KERNEL); 297638c8a9a5SSteve French if (!copy_path) 297738c8a9a5SSteve French return -ENOMEM; 297838c8a9a5SSteve French memcpy((char *)copy_path, (const char *)path, 297938c8a9a5SSteve French uni_path_len); 298038c8a9a5SSteve French uni_path_len = copy_size; 298138c8a9a5SSteve French path = copy_path; 298238c8a9a5SSteve French } 298338c8a9a5SSteve French 298438c8a9a5SSteve French iov[1].iov_len = uni_path_len; 298538c8a9a5SSteve French iov[1].iov_base = path; 298638c8a9a5SSteve French 298738c8a9a5SSteve French if ((!server->oplocks) || (tcon->no_lease)) 298838c8a9a5SSteve French *oplock = SMB2_OPLOCK_LEVEL_NONE; 298938c8a9a5SSteve French 299038c8a9a5SSteve French if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) || 299138c8a9a5SSteve French *oplock == SMB2_OPLOCK_LEVEL_NONE) 299238c8a9a5SSteve French req->RequestedOplockLevel = *oplock; 299338c8a9a5SSteve French else if (!(server->capabilities & SMB2_GLOBAL_CAP_DIRECTORY_LEASING) && 299438c8a9a5SSteve French (oparms->create_options & CREATE_NOT_FILE)) 299538c8a9a5SSteve French req->RequestedOplockLevel = *oplock; /* no srv lease support */ 299638c8a9a5SSteve French else { 299738c8a9a5SSteve French rc = add_lease_context(server, req, iov, &n_iov, 299838c8a9a5SSteve French oparms->fid->lease_key, oplock); 299938c8a9a5SSteve French if (rc) 300038c8a9a5SSteve French return rc; 300138c8a9a5SSteve French } 300238c8a9a5SSteve French 300338c8a9a5SSteve French if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) { 300438c8a9a5SSteve French rc = add_durable_context(iov, &n_iov, oparms, 300538c8a9a5SSteve French tcon->use_persistent); 300638c8a9a5SSteve French if (rc) 300738c8a9a5SSteve French return rc; 300838c8a9a5SSteve French } 300938c8a9a5SSteve French 301038c8a9a5SSteve French if (tcon->posix_extensions) { 301138c8a9a5SSteve French rc = add_posix_context(iov, &n_iov, oparms->mode); 301238c8a9a5SSteve French if (rc) 301338c8a9a5SSteve French return rc; 301438c8a9a5SSteve French } 301538c8a9a5SSteve French 301638c8a9a5SSteve French if (tcon->snapshot_time) { 301738c8a9a5SSteve French cifs_dbg(FYI, "adding snapshot context\n"); 301838c8a9a5SSteve French rc = add_twarp_context(iov, &n_iov, tcon->snapshot_time); 301938c8a9a5SSteve French if (rc) 302038c8a9a5SSteve French return rc; 302138c8a9a5SSteve French } 302238c8a9a5SSteve French 302338c8a9a5SSteve French if ((oparms->disposition != FILE_OPEN) && (oparms->cifs_sb)) { 302438c8a9a5SSteve French bool set_mode; 302538c8a9a5SSteve French bool set_owner; 302638c8a9a5SSteve French 302738c8a9a5SSteve French if ((oparms->cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) && 302838c8a9a5SSteve French (oparms->mode != ACL_NO_MODE)) 302938c8a9a5SSteve French set_mode = true; 303038c8a9a5SSteve French else { 303138c8a9a5SSteve French set_mode = false; 303238c8a9a5SSteve French oparms->mode = ACL_NO_MODE; 303338c8a9a5SSteve French } 303438c8a9a5SSteve French 303538c8a9a5SSteve French if (oparms->cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UID_FROM_ACL) 303638c8a9a5SSteve French set_owner = true; 303738c8a9a5SSteve French else 303838c8a9a5SSteve French set_owner = false; 303938c8a9a5SSteve French 304038c8a9a5SSteve French if (set_owner | set_mode) { 304138c8a9a5SSteve French cifs_dbg(FYI, "add sd with mode 0x%x\n", oparms->mode); 304238c8a9a5SSteve French rc = add_sd_context(iov, &n_iov, oparms->mode, set_owner); 304338c8a9a5SSteve French if (rc) 304438c8a9a5SSteve French return rc; 304538c8a9a5SSteve French } 304638c8a9a5SSteve French } 304738c8a9a5SSteve French 304838c8a9a5SSteve French add_query_id_context(iov, &n_iov); 304938c8a9a5SSteve French 305038c8a9a5SSteve French if (n_iov > 2) { 305138c8a9a5SSteve French /* 305238c8a9a5SSteve French * We have create contexts behind iov[1] (the file 305338c8a9a5SSteve French * name), point at them from the main create request 305438c8a9a5SSteve French */ 305538c8a9a5SSteve French req->CreateContextsOffset = cpu_to_le32( 305638c8a9a5SSteve French sizeof(struct smb2_create_req) + 305738c8a9a5SSteve French iov[1].iov_len); 305838c8a9a5SSteve French req->CreateContextsLength = 0; 305938c8a9a5SSteve French 306038c8a9a5SSteve French for (unsigned int i = 2; i < (n_iov-1); i++) { 306138c8a9a5SSteve French struct kvec *v = &iov[i]; 306238c8a9a5SSteve French size_t len = v->iov_len; 306338c8a9a5SSteve French struct create_context *cctx = 306438c8a9a5SSteve French (struct create_context *)v->iov_base; 306538c8a9a5SSteve French 306638c8a9a5SSteve French cctx->Next = cpu_to_le32(len); 306738c8a9a5SSteve French le32_add_cpu(&req->CreateContextsLength, len); 306838c8a9a5SSteve French } 306938c8a9a5SSteve French le32_add_cpu(&req->CreateContextsLength, 307038c8a9a5SSteve French iov[n_iov-1].iov_len); 307138c8a9a5SSteve French } 307238c8a9a5SSteve French 307338c8a9a5SSteve French rqst->rq_nvec = n_iov; 307438c8a9a5SSteve French return 0; 307538c8a9a5SSteve French } 307638c8a9a5SSteve French 307738c8a9a5SSteve French /* rq_iov[0] is the request and is released by cifs_small_buf_release(). 307838c8a9a5SSteve French * All other vectors are freed by kfree(). 307938c8a9a5SSteve French */ 308038c8a9a5SSteve French void 308138c8a9a5SSteve French SMB2_open_free(struct smb_rqst *rqst) 308238c8a9a5SSteve French { 308338c8a9a5SSteve French int i; 308438c8a9a5SSteve French 308538c8a9a5SSteve French if (rqst && rqst->rq_iov) { 308638c8a9a5SSteve French cifs_small_buf_release(rqst->rq_iov[0].iov_base); 308738c8a9a5SSteve French for (i = 1; i < rqst->rq_nvec; i++) 308838c8a9a5SSteve French if (rqst->rq_iov[i].iov_base != smb2_padding) 308938c8a9a5SSteve French kfree(rqst->rq_iov[i].iov_base); 309038c8a9a5SSteve French } 309138c8a9a5SSteve French } 309238c8a9a5SSteve French 309338c8a9a5SSteve French int 309438c8a9a5SSteve French SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path, 309538c8a9a5SSteve French __u8 *oplock, struct smb2_file_all_info *buf, 309638c8a9a5SSteve French struct create_posix_rsp *posix, 309738c8a9a5SSteve French struct kvec *err_iov, int *buftype) 309838c8a9a5SSteve French { 309938c8a9a5SSteve French struct smb_rqst rqst; 310038c8a9a5SSteve French struct smb2_create_rsp *rsp = NULL; 310138c8a9a5SSteve French struct cifs_tcon *tcon = oparms->tcon; 310238c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 310338c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 310438c8a9a5SSteve French struct kvec iov[SMB2_CREATE_IOV_SIZE]; 310538c8a9a5SSteve French struct kvec rsp_iov = {NULL, 0}; 310638c8a9a5SSteve French int resp_buftype = CIFS_NO_BUFFER; 310738c8a9a5SSteve French int rc = 0; 310838c8a9a5SSteve French int flags = 0; 310938c8a9a5SSteve French 311038c8a9a5SSteve French cifs_dbg(FYI, "create/open\n"); 311138c8a9a5SSteve French if (!ses || !server) 311238c8a9a5SSteve French return -EIO; 311338c8a9a5SSteve French 311438c8a9a5SSteve French if (smb3_encryption_required(tcon)) 311538c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 311638c8a9a5SSteve French 311738c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 311838c8a9a5SSteve French memset(&iov, 0, sizeof(iov)); 311938c8a9a5SSteve French rqst.rq_iov = iov; 312038c8a9a5SSteve French rqst.rq_nvec = SMB2_CREATE_IOV_SIZE; 312138c8a9a5SSteve French 312238c8a9a5SSteve French rc = SMB2_open_init(tcon, server, 312338c8a9a5SSteve French &rqst, oplock, oparms, path); 312438c8a9a5SSteve French if (rc) 312538c8a9a5SSteve French goto creat_exit; 312638c8a9a5SSteve French 312738c8a9a5SSteve French trace_smb3_open_enter(xid, tcon->tid, tcon->ses->Suid, oparms->path, 312838c8a9a5SSteve French oparms->create_options, oparms->desired_access); 312938c8a9a5SSteve French 313038c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 313138c8a9a5SSteve French &rqst, &resp_buftype, flags, 313238c8a9a5SSteve French &rsp_iov); 313338c8a9a5SSteve French rsp = (struct smb2_create_rsp *)rsp_iov.iov_base; 313438c8a9a5SSteve French 313538c8a9a5SSteve French if (rc != 0) { 313638c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_CREATE_HE); 313738c8a9a5SSteve French if (err_iov && rsp) { 313838c8a9a5SSteve French *err_iov = rsp_iov; 313938c8a9a5SSteve French *buftype = resp_buftype; 314038c8a9a5SSteve French resp_buftype = CIFS_NO_BUFFER; 314138c8a9a5SSteve French rsp = NULL; 314238c8a9a5SSteve French } 314338c8a9a5SSteve French trace_smb3_open_err(xid, tcon->tid, ses->Suid, 314438c8a9a5SSteve French oparms->create_options, oparms->desired_access, rc); 314538c8a9a5SSteve French if (rc == -EREMCHG) { 314638c8a9a5SSteve French pr_warn_once("server share %s deleted\n", 314738c8a9a5SSteve French tcon->tree_name); 314838c8a9a5SSteve French tcon->need_reconnect = true; 314938c8a9a5SSteve French } 315038c8a9a5SSteve French goto creat_exit; 315138c8a9a5SSteve French } else if (rsp == NULL) /* unlikely to happen, but safer to check */ 315238c8a9a5SSteve French goto creat_exit; 315338c8a9a5SSteve French else 315438c8a9a5SSteve French trace_smb3_open_done(xid, rsp->PersistentFileId, tcon->tid, ses->Suid, 315538c8a9a5SSteve French oparms->create_options, oparms->desired_access); 315638c8a9a5SSteve French 315738c8a9a5SSteve French atomic_inc(&tcon->num_remote_opens); 315838c8a9a5SSteve French oparms->fid->persistent_fid = rsp->PersistentFileId; 315938c8a9a5SSteve French oparms->fid->volatile_fid = rsp->VolatileFileId; 316038c8a9a5SSteve French oparms->fid->access = oparms->desired_access; 316138c8a9a5SSteve French #ifdef CONFIG_CIFS_DEBUG2 316238c8a9a5SSteve French oparms->fid->mid = le64_to_cpu(rsp->hdr.MessageId); 316338c8a9a5SSteve French #endif /* CIFS_DEBUG2 */ 316438c8a9a5SSteve French 316538c8a9a5SSteve French if (buf) { 316638c8a9a5SSteve French buf->CreationTime = rsp->CreationTime; 316738c8a9a5SSteve French buf->LastAccessTime = rsp->LastAccessTime; 316838c8a9a5SSteve French buf->LastWriteTime = rsp->LastWriteTime; 316938c8a9a5SSteve French buf->ChangeTime = rsp->ChangeTime; 317038c8a9a5SSteve French buf->AllocationSize = rsp->AllocationSize; 317138c8a9a5SSteve French buf->EndOfFile = rsp->EndofFile; 317238c8a9a5SSteve French buf->Attributes = rsp->FileAttributes; 317338c8a9a5SSteve French buf->NumberOfLinks = cpu_to_le32(1); 317438c8a9a5SSteve French buf->DeletePending = 0; 317538c8a9a5SSteve French } 317638c8a9a5SSteve French 317738c8a9a5SSteve French 317817a0f64cSPaulo Alcantara rc = smb2_parse_contexts(server, &rsp_iov, &oparms->fid->epoch, 317938c8a9a5SSteve French oparms->fid->lease_key, oplock, buf, posix); 318038c8a9a5SSteve French creat_exit: 318138c8a9a5SSteve French SMB2_open_free(&rqst); 318238c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp); 318338c8a9a5SSteve French return rc; 318438c8a9a5SSteve French } 318538c8a9a5SSteve French 318638c8a9a5SSteve French int 318738c8a9a5SSteve French SMB2_ioctl_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server, 318838c8a9a5SSteve French struct smb_rqst *rqst, 318938c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, u32 opcode, 319038c8a9a5SSteve French char *in_data, u32 indatalen, 319138c8a9a5SSteve French __u32 max_response_size) 319238c8a9a5SSteve French { 319338c8a9a5SSteve French struct smb2_ioctl_req *req; 319438c8a9a5SSteve French struct kvec *iov = rqst->rq_iov; 319538c8a9a5SSteve French unsigned int total_len; 319638c8a9a5SSteve French int rc; 319738c8a9a5SSteve French char *in_data_buf; 319838c8a9a5SSteve French 319938c8a9a5SSteve French rc = smb2_ioctl_req_init(opcode, tcon, server, 320038c8a9a5SSteve French (void **) &req, &total_len); 320138c8a9a5SSteve French if (rc) 320238c8a9a5SSteve French return rc; 320338c8a9a5SSteve French 320438c8a9a5SSteve French if (indatalen) { 320538c8a9a5SSteve French /* 320638c8a9a5SSteve French * indatalen is usually small at a couple of bytes max, so 320738c8a9a5SSteve French * just allocate through generic pool 320838c8a9a5SSteve French */ 320938c8a9a5SSteve French in_data_buf = kmemdup(in_data, indatalen, GFP_NOFS); 321038c8a9a5SSteve French if (!in_data_buf) { 321138c8a9a5SSteve French cifs_small_buf_release(req); 321238c8a9a5SSteve French return -ENOMEM; 321338c8a9a5SSteve French } 321438c8a9a5SSteve French } 321538c8a9a5SSteve French 321638c8a9a5SSteve French req->CtlCode = cpu_to_le32(opcode); 321738c8a9a5SSteve French req->PersistentFileId = persistent_fid; 321838c8a9a5SSteve French req->VolatileFileId = volatile_fid; 321938c8a9a5SSteve French 322038c8a9a5SSteve French iov[0].iov_base = (char *)req; 322138c8a9a5SSteve French /* 322238c8a9a5SSteve French * If no input data, the size of ioctl struct in 322338c8a9a5SSteve French * protocol spec still includes a 1 byte data buffer, 322438c8a9a5SSteve French * but if input data passed to ioctl, we do not 322538c8a9a5SSteve French * want to double count this, so we do not send 322638c8a9a5SSteve French * the dummy one byte of data in iovec[0] if sending 322738c8a9a5SSteve French * input data (in iovec[1]). 322838c8a9a5SSteve French */ 322938c8a9a5SSteve French if (indatalen) { 323038c8a9a5SSteve French req->InputCount = cpu_to_le32(indatalen); 323138c8a9a5SSteve French /* do not set InputOffset if no input data */ 323238c8a9a5SSteve French req->InputOffset = 323338c8a9a5SSteve French cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer)); 323438c8a9a5SSteve French rqst->rq_nvec = 2; 323538c8a9a5SSteve French iov[0].iov_len = total_len - 1; 323638c8a9a5SSteve French iov[1].iov_base = in_data_buf; 323738c8a9a5SSteve French iov[1].iov_len = indatalen; 323838c8a9a5SSteve French } else { 323938c8a9a5SSteve French rqst->rq_nvec = 1; 324038c8a9a5SSteve French iov[0].iov_len = total_len; 324138c8a9a5SSteve French } 324238c8a9a5SSteve French 324338c8a9a5SSteve French req->OutputOffset = 0; 324438c8a9a5SSteve French req->OutputCount = 0; /* MBZ */ 324538c8a9a5SSteve French 324638c8a9a5SSteve French /* 324738c8a9a5SSteve French * In most cases max_response_size is set to 16K (CIFSMaxBufSize) 324838c8a9a5SSteve French * We Could increase default MaxOutputResponse, but that could require 324938c8a9a5SSteve French * more credits. Windows typically sets this smaller, but for some 325038c8a9a5SSteve French * ioctls it may be useful to allow server to send more. No point 325138c8a9a5SSteve French * limiting what the server can send as long as fits in one credit 325238c8a9a5SSteve French * We can not handle more than CIFS_MAX_BUF_SIZE yet but may want 325338c8a9a5SSteve French * to increase this limit up in the future. 325438c8a9a5SSteve French * Note that for snapshot queries that servers like Azure expect that 325538c8a9a5SSteve French * the first query be minimal size (and just used to get the number/size 325638c8a9a5SSteve French * of previous versions) so response size must be specified as EXACTLY 325738c8a9a5SSteve French * sizeof(struct snapshot_array) which is 16 when rounded up to multiple 325838c8a9a5SSteve French * of eight bytes. Currently that is the only case where we set max 325938c8a9a5SSteve French * response size smaller. 326038c8a9a5SSteve French */ 326138c8a9a5SSteve French req->MaxOutputResponse = cpu_to_le32(max_response_size); 326238c8a9a5SSteve French req->hdr.CreditCharge = 326338c8a9a5SSteve French cpu_to_le16(DIV_ROUND_UP(max(indatalen, max_response_size), 326438c8a9a5SSteve French SMB2_MAX_BUFFER_SIZE)); 326538c8a9a5SSteve French /* always an FSCTL (for now) */ 326638c8a9a5SSteve French req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL); 326738c8a9a5SSteve French 326838c8a9a5SSteve French /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */ 326938c8a9a5SSteve French if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO) 327038c8a9a5SSteve French req->hdr.Flags |= SMB2_FLAGS_SIGNED; 327138c8a9a5SSteve French 327238c8a9a5SSteve French return 0; 327338c8a9a5SSteve French } 327438c8a9a5SSteve French 327538c8a9a5SSteve French void 327638c8a9a5SSteve French SMB2_ioctl_free(struct smb_rqst *rqst) 327738c8a9a5SSteve French { 327838c8a9a5SSteve French int i; 32792c75426cSSteve French 328038c8a9a5SSteve French if (rqst && rqst->rq_iov) { 328138c8a9a5SSteve French cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */ 328238c8a9a5SSteve French for (i = 1; i < rqst->rq_nvec; i++) 328338c8a9a5SSteve French if (rqst->rq_iov[i].iov_base != smb2_padding) 328438c8a9a5SSteve French kfree(rqst->rq_iov[i].iov_base); 328538c8a9a5SSteve French } 328638c8a9a5SSteve French } 328738c8a9a5SSteve French 328838c8a9a5SSteve French 328938c8a9a5SSteve French /* 329038c8a9a5SSteve French * SMB2 IOCTL is used for both IOCTLs and FSCTLs 329138c8a9a5SSteve French */ 329238c8a9a5SSteve French int 329338c8a9a5SSteve French SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, 329438c8a9a5SSteve French u64 volatile_fid, u32 opcode, char *in_data, u32 indatalen, 329538c8a9a5SSteve French u32 max_out_data_len, char **out_data, 329638c8a9a5SSteve French u32 *plen /* returned data len */) 329738c8a9a5SSteve French { 329838c8a9a5SSteve French struct smb_rqst rqst; 329938c8a9a5SSteve French struct smb2_ioctl_rsp *rsp = NULL; 330038c8a9a5SSteve French struct cifs_ses *ses; 330138c8a9a5SSteve French struct TCP_Server_Info *server; 330238c8a9a5SSteve French struct kvec iov[SMB2_IOCTL_IOV_SIZE]; 330338c8a9a5SSteve French struct kvec rsp_iov = {NULL, 0}; 330438c8a9a5SSteve French int resp_buftype = CIFS_NO_BUFFER; 330538c8a9a5SSteve French int rc = 0; 330638c8a9a5SSteve French int flags = 0; 330738c8a9a5SSteve French 330838c8a9a5SSteve French cifs_dbg(FYI, "SMB2 IOCTL\n"); 330938c8a9a5SSteve French 331038c8a9a5SSteve French if (out_data != NULL) 331138c8a9a5SSteve French *out_data = NULL; 331238c8a9a5SSteve French 331338c8a9a5SSteve French /* zero out returned data len, in case of error */ 331438c8a9a5SSteve French if (plen) 331538c8a9a5SSteve French *plen = 0; 331638c8a9a5SSteve French 331738c8a9a5SSteve French if (!tcon) 331838c8a9a5SSteve French return -EIO; 331938c8a9a5SSteve French 332038c8a9a5SSteve French ses = tcon->ses; 332138c8a9a5SSteve French if (!ses) 332238c8a9a5SSteve French return -EIO; 332338c8a9a5SSteve French 332438c8a9a5SSteve French server = cifs_pick_channel(ses); 332538c8a9a5SSteve French if (!server) 332638c8a9a5SSteve French return -EIO; 332738c8a9a5SSteve French 332838c8a9a5SSteve French if (smb3_encryption_required(tcon)) 332938c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 333038c8a9a5SSteve French 333138c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 333238c8a9a5SSteve French memset(&iov, 0, sizeof(iov)); 333338c8a9a5SSteve French rqst.rq_iov = iov; 333438c8a9a5SSteve French rqst.rq_nvec = SMB2_IOCTL_IOV_SIZE; 333538c8a9a5SSteve French 333638c8a9a5SSteve French rc = SMB2_ioctl_init(tcon, server, 333738c8a9a5SSteve French &rqst, persistent_fid, volatile_fid, opcode, 333838c8a9a5SSteve French in_data, indatalen, max_out_data_len); 333938c8a9a5SSteve French if (rc) 334038c8a9a5SSteve French goto ioctl_exit; 334138c8a9a5SSteve French 334238c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 334338c8a9a5SSteve French &rqst, &resp_buftype, flags, 334438c8a9a5SSteve French &rsp_iov); 334538c8a9a5SSteve French rsp = (struct smb2_ioctl_rsp *)rsp_iov.iov_base; 334638c8a9a5SSteve French 334738c8a9a5SSteve French if (rc != 0) 334838c8a9a5SSteve French trace_smb3_fsctl_err(xid, persistent_fid, tcon->tid, 334938c8a9a5SSteve French ses->Suid, 0, opcode, rc); 335038c8a9a5SSteve French 335138c8a9a5SSteve French if ((rc != 0) && (rc != -EINVAL) && (rc != -E2BIG)) { 335238c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE); 335338c8a9a5SSteve French goto ioctl_exit; 335438c8a9a5SSteve French } else if (rc == -EINVAL) { 335538c8a9a5SSteve French if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) && 335638c8a9a5SSteve French (opcode != FSCTL_SRV_COPYCHUNK)) { 335738c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE); 335838c8a9a5SSteve French goto ioctl_exit; 335938c8a9a5SSteve French } 336038c8a9a5SSteve French } else if (rc == -E2BIG) { 336138c8a9a5SSteve French if (opcode != FSCTL_QUERY_ALLOCATED_RANGES) { 336238c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE); 336338c8a9a5SSteve French goto ioctl_exit; 336438c8a9a5SSteve French } 336538c8a9a5SSteve French } 336638c8a9a5SSteve French 336738c8a9a5SSteve French /* check if caller wants to look at return data or just return rc */ 336838c8a9a5SSteve French if ((plen == NULL) || (out_data == NULL)) 336938c8a9a5SSteve French goto ioctl_exit; 337038c8a9a5SSteve French 337138c8a9a5SSteve French /* 337238c8a9a5SSteve French * Although unlikely to be possible for rsp to be null and rc not set, 337338c8a9a5SSteve French * adding check below is slightly safer long term (and quiets Coverity 337438c8a9a5SSteve French * warning) 337538c8a9a5SSteve French */ 337638c8a9a5SSteve French if (rsp == NULL) { 337738c8a9a5SSteve French rc = -EIO; 337838c8a9a5SSteve French goto ioctl_exit; 337938c8a9a5SSteve French } 338038c8a9a5SSteve French 338138c8a9a5SSteve French *plen = le32_to_cpu(rsp->OutputCount); 338238c8a9a5SSteve French 338338c8a9a5SSteve French /* We check for obvious errors in the output buffer length and offset */ 338438c8a9a5SSteve French if (*plen == 0) 338538c8a9a5SSteve French goto ioctl_exit; /* server returned no data */ 338638c8a9a5SSteve French else if (*plen > rsp_iov.iov_len || *plen > 0xFF00) { 338738c8a9a5SSteve French cifs_tcon_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen); 338838c8a9a5SSteve French *plen = 0; 338938c8a9a5SSteve French rc = -EIO; 339038c8a9a5SSteve French goto ioctl_exit; 339138c8a9a5SSteve French } 339238c8a9a5SSteve French 339338c8a9a5SSteve French if (rsp_iov.iov_len - *plen < le32_to_cpu(rsp->OutputOffset)) { 339438c8a9a5SSteve French cifs_tcon_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen, 339538c8a9a5SSteve French le32_to_cpu(rsp->OutputOffset)); 339638c8a9a5SSteve French *plen = 0; 339738c8a9a5SSteve French rc = -EIO; 339838c8a9a5SSteve French goto ioctl_exit; 339938c8a9a5SSteve French } 340038c8a9a5SSteve French 340138c8a9a5SSteve French *out_data = kmemdup((char *)rsp + le32_to_cpu(rsp->OutputOffset), 340238c8a9a5SSteve French *plen, GFP_KERNEL); 340338c8a9a5SSteve French if (*out_data == NULL) { 340438c8a9a5SSteve French rc = -ENOMEM; 340538c8a9a5SSteve French goto ioctl_exit; 340638c8a9a5SSteve French } 340738c8a9a5SSteve French 340838c8a9a5SSteve French ioctl_exit: 340938c8a9a5SSteve French SMB2_ioctl_free(&rqst); 341038c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp); 341138c8a9a5SSteve French return rc; 341238c8a9a5SSteve French } 341338c8a9a5SSteve French 341438c8a9a5SSteve French /* 341538c8a9a5SSteve French * Individual callers to ioctl worker function follow 341638c8a9a5SSteve French */ 341738c8a9a5SSteve French 341838c8a9a5SSteve French int 341938c8a9a5SSteve French SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, 342038c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid) 342138c8a9a5SSteve French { 342238c8a9a5SSteve French int rc; 342338c8a9a5SSteve French struct compress_ioctl fsctl_input; 342438c8a9a5SSteve French char *ret_data = NULL; 342538c8a9a5SSteve French 342638c8a9a5SSteve French fsctl_input.CompressionState = 342738c8a9a5SSteve French cpu_to_le16(COMPRESSION_FORMAT_DEFAULT); 342838c8a9a5SSteve French 342938c8a9a5SSteve French rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid, 343038c8a9a5SSteve French FSCTL_SET_COMPRESSION, 343138c8a9a5SSteve French (char *)&fsctl_input /* data input */, 343238c8a9a5SSteve French 2 /* in data len */, CIFSMaxBufSize /* max out data */, 343338c8a9a5SSteve French &ret_data /* out data */, NULL); 343438c8a9a5SSteve French 343538c8a9a5SSteve French cifs_dbg(FYI, "set compression rc %d\n", rc); 343638c8a9a5SSteve French 343738c8a9a5SSteve French return rc; 343838c8a9a5SSteve French } 343938c8a9a5SSteve French 344038c8a9a5SSteve French int 344138c8a9a5SSteve French SMB2_close_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server, 344238c8a9a5SSteve French struct smb_rqst *rqst, 344338c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, bool query_attrs) 344438c8a9a5SSteve French { 344538c8a9a5SSteve French struct smb2_close_req *req; 344638c8a9a5SSteve French struct kvec *iov = rqst->rq_iov; 344738c8a9a5SSteve French unsigned int total_len; 344838c8a9a5SSteve French int rc; 344938c8a9a5SSteve French 345038c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_CLOSE, tcon, server, 345138c8a9a5SSteve French (void **) &req, &total_len); 345238c8a9a5SSteve French if (rc) 345338c8a9a5SSteve French return rc; 345438c8a9a5SSteve French 345538c8a9a5SSteve French req->PersistentFileId = persistent_fid; 345638c8a9a5SSteve French req->VolatileFileId = volatile_fid; 345738c8a9a5SSteve French if (query_attrs) 345838c8a9a5SSteve French req->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB; 345938c8a9a5SSteve French else 346038c8a9a5SSteve French req->Flags = 0; 346138c8a9a5SSteve French iov[0].iov_base = (char *)req; 346238c8a9a5SSteve French iov[0].iov_len = total_len; 346338c8a9a5SSteve French 346438c8a9a5SSteve French return 0; 346538c8a9a5SSteve French } 346638c8a9a5SSteve French 346738c8a9a5SSteve French void 346838c8a9a5SSteve French SMB2_close_free(struct smb_rqst *rqst) 346938c8a9a5SSteve French { 347038c8a9a5SSteve French if (rqst && rqst->rq_iov) 347138c8a9a5SSteve French cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */ 347238c8a9a5SSteve French } 347338c8a9a5SSteve French 347438c8a9a5SSteve French int 347538c8a9a5SSteve French __SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, 347638c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, 347738c8a9a5SSteve French struct smb2_file_network_open_info *pbuf) 347838c8a9a5SSteve French { 347938c8a9a5SSteve French struct smb_rqst rqst; 348038c8a9a5SSteve French struct smb2_close_rsp *rsp = NULL; 348138c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 348238c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 348338c8a9a5SSteve French struct kvec iov[1]; 348438c8a9a5SSteve French struct kvec rsp_iov; 348538c8a9a5SSteve French int resp_buftype = CIFS_NO_BUFFER; 348638c8a9a5SSteve French int rc = 0; 348738c8a9a5SSteve French int flags = 0; 348838c8a9a5SSteve French bool query_attrs = false; 348938c8a9a5SSteve French 349038c8a9a5SSteve French cifs_dbg(FYI, "Close\n"); 349138c8a9a5SSteve French 349238c8a9a5SSteve French if (!ses || !server) 349338c8a9a5SSteve French return -EIO; 349438c8a9a5SSteve French 349538c8a9a5SSteve French if (smb3_encryption_required(tcon)) 349638c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 349738c8a9a5SSteve French 349838c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 349938c8a9a5SSteve French memset(&iov, 0, sizeof(iov)); 350038c8a9a5SSteve French rqst.rq_iov = iov; 350138c8a9a5SSteve French rqst.rq_nvec = 1; 350238c8a9a5SSteve French 350338c8a9a5SSteve French /* check if need to ask server to return timestamps in close response */ 350438c8a9a5SSteve French if (pbuf) 350538c8a9a5SSteve French query_attrs = true; 350638c8a9a5SSteve French 350738c8a9a5SSteve French trace_smb3_close_enter(xid, persistent_fid, tcon->tid, ses->Suid); 350838c8a9a5SSteve French rc = SMB2_close_init(tcon, server, 350938c8a9a5SSteve French &rqst, persistent_fid, volatile_fid, 351038c8a9a5SSteve French query_attrs); 351138c8a9a5SSteve French if (rc) 351238c8a9a5SSteve French goto close_exit; 351338c8a9a5SSteve French 351438c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 351538c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 351638c8a9a5SSteve French rsp = (struct smb2_close_rsp *)rsp_iov.iov_base; 351738c8a9a5SSteve French 351838c8a9a5SSteve French if (rc != 0) { 351938c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE); 352038c8a9a5SSteve French trace_smb3_close_err(xid, persistent_fid, tcon->tid, ses->Suid, 352138c8a9a5SSteve French rc); 352238c8a9a5SSteve French goto close_exit; 352338c8a9a5SSteve French } else { 352438c8a9a5SSteve French trace_smb3_close_done(xid, persistent_fid, tcon->tid, 352538c8a9a5SSteve French ses->Suid); 352638c8a9a5SSteve French if (pbuf) 35275ca51814SDmitry Antipov memcpy(&pbuf->network_open_info, 35285ca51814SDmitry Antipov &rsp->network_open_info, 35295ca51814SDmitry Antipov sizeof(pbuf->network_open_info)); 353038c8a9a5SSteve French } 353138c8a9a5SSteve French 353238c8a9a5SSteve French atomic_dec(&tcon->num_remote_opens); 353338c8a9a5SSteve French close_exit: 353438c8a9a5SSteve French SMB2_close_free(&rqst); 353538c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp); 353638c8a9a5SSteve French 353738c8a9a5SSteve French /* retry close in a worker thread if this one is interrupted */ 353838c8a9a5SSteve French if (is_interrupt_error(rc)) { 353938c8a9a5SSteve French int tmp_rc; 354038c8a9a5SSteve French 354138c8a9a5SSteve French tmp_rc = smb2_handle_cancelled_close(tcon, persistent_fid, 354238c8a9a5SSteve French volatile_fid); 354338c8a9a5SSteve French if (tmp_rc) 354438c8a9a5SSteve French cifs_dbg(VFS, "handle cancelled close fid 0x%llx returned error %d\n", 354538c8a9a5SSteve French persistent_fid, tmp_rc); 354638c8a9a5SSteve French } 354738c8a9a5SSteve French return rc; 354838c8a9a5SSteve French } 354938c8a9a5SSteve French 355038c8a9a5SSteve French int 355138c8a9a5SSteve French SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, 355238c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid) 355338c8a9a5SSteve French { 355438c8a9a5SSteve French return __SMB2_close(xid, tcon, persistent_fid, volatile_fid, NULL); 355538c8a9a5SSteve French } 355638c8a9a5SSteve French 355738c8a9a5SSteve French int 355838c8a9a5SSteve French smb2_validate_iov(unsigned int offset, unsigned int buffer_length, 355938c8a9a5SSteve French struct kvec *iov, unsigned int min_buf_size) 356038c8a9a5SSteve French { 356138c8a9a5SSteve French unsigned int smb_len = iov->iov_len; 356238c8a9a5SSteve French char *end_of_smb = smb_len + (char *)iov->iov_base; 356338c8a9a5SSteve French char *begin_of_buf = offset + (char *)iov->iov_base; 356438c8a9a5SSteve French char *end_of_buf = begin_of_buf + buffer_length; 356538c8a9a5SSteve French 356638c8a9a5SSteve French 356738c8a9a5SSteve French if (buffer_length < min_buf_size) { 356838c8a9a5SSteve French cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n", 356938c8a9a5SSteve French buffer_length, min_buf_size); 357038c8a9a5SSteve French return -EINVAL; 357138c8a9a5SSteve French } 357238c8a9a5SSteve French 357338c8a9a5SSteve French /* check if beyond RFC1001 maximum length */ 357438c8a9a5SSteve French if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) { 357538c8a9a5SSteve French cifs_dbg(VFS, "buffer length %d or smb length %d too large\n", 357638c8a9a5SSteve French buffer_length, smb_len); 357738c8a9a5SSteve French return -EINVAL; 357838c8a9a5SSteve French } 357938c8a9a5SSteve French 358038c8a9a5SSteve French if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) { 358138c8a9a5SSteve French cifs_dbg(VFS, "Invalid server response, bad offset to data\n"); 358238c8a9a5SSteve French return -EINVAL; 358338c8a9a5SSteve French } 358438c8a9a5SSteve French 358538c8a9a5SSteve French return 0; 358638c8a9a5SSteve French } 358738c8a9a5SSteve French 358838c8a9a5SSteve French /* 358938c8a9a5SSteve French * If SMB buffer fields are valid, copy into temporary buffer to hold result. 359038c8a9a5SSteve French * Caller must free buffer. 359138c8a9a5SSteve French */ 359238c8a9a5SSteve French int 359338c8a9a5SSteve French smb2_validate_and_copy_iov(unsigned int offset, unsigned int buffer_length, 359438c8a9a5SSteve French struct kvec *iov, unsigned int minbufsize, 359538c8a9a5SSteve French char *data) 359638c8a9a5SSteve French { 359738c8a9a5SSteve French char *begin_of_buf = offset + (char *)iov->iov_base; 359838c8a9a5SSteve French int rc; 359938c8a9a5SSteve French 360038c8a9a5SSteve French if (!data) 360138c8a9a5SSteve French return -EINVAL; 360238c8a9a5SSteve French 360338c8a9a5SSteve French rc = smb2_validate_iov(offset, buffer_length, iov, minbufsize); 360438c8a9a5SSteve French if (rc) 360538c8a9a5SSteve French return rc; 360638c8a9a5SSteve French 360738c8a9a5SSteve French memcpy(data, begin_of_buf, minbufsize); 360838c8a9a5SSteve French 360938c8a9a5SSteve French return 0; 361038c8a9a5SSteve French } 361138c8a9a5SSteve French 361238c8a9a5SSteve French int 361338c8a9a5SSteve French SMB2_query_info_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server, 361438c8a9a5SSteve French struct smb_rqst *rqst, 361538c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, 361638c8a9a5SSteve French u8 info_class, u8 info_type, u32 additional_info, 361738c8a9a5SSteve French size_t output_len, size_t input_len, void *input) 361838c8a9a5SSteve French { 361938c8a9a5SSteve French struct smb2_query_info_req *req; 362038c8a9a5SSteve French struct kvec *iov = rqst->rq_iov; 362138c8a9a5SSteve French unsigned int total_len; 36223b5f0d0aSPaulo Alcantara size_t len; 362338c8a9a5SSteve French int rc; 362438c8a9a5SSteve French 36253b5f0d0aSPaulo Alcantara if (unlikely(check_add_overflow(input_len, sizeof(*req), &len) || 36263b5f0d0aSPaulo Alcantara len > CIFSMaxBufSize)) 36273b5f0d0aSPaulo Alcantara return -EINVAL; 36283b5f0d0aSPaulo Alcantara 362938c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, server, 363038c8a9a5SSteve French (void **) &req, &total_len); 363138c8a9a5SSteve French if (rc) 363238c8a9a5SSteve French return rc; 363338c8a9a5SSteve French 363438c8a9a5SSteve French req->InfoType = info_type; 363538c8a9a5SSteve French req->FileInfoClass = info_class; 363638c8a9a5SSteve French req->PersistentFileId = persistent_fid; 363738c8a9a5SSteve French req->VolatileFileId = volatile_fid; 363838c8a9a5SSteve French req->AdditionalInformation = cpu_to_le32(additional_info); 363938c8a9a5SSteve French 364038c8a9a5SSteve French req->OutputBufferLength = cpu_to_le32(output_len); 364138c8a9a5SSteve French if (input_len) { 364238c8a9a5SSteve French req->InputBufferLength = cpu_to_le32(input_len); 364338c8a9a5SSteve French /* total_len for smb query request never close to le16 max */ 364438c8a9a5SSteve French req->InputBufferOffset = cpu_to_le16(total_len - 1); 364538c8a9a5SSteve French memcpy(req->Buffer, input, input_len); 364638c8a9a5SSteve French } 364738c8a9a5SSteve French 364838c8a9a5SSteve French iov[0].iov_base = (char *)req; 364938c8a9a5SSteve French /* 1 for Buffer */ 36503b5f0d0aSPaulo Alcantara iov[0].iov_len = len; 365138c8a9a5SSteve French return 0; 365238c8a9a5SSteve French } 365338c8a9a5SSteve French 365438c8a9a5SSteve French void 365538c8a9a5SSteve French SMB2_query_info_free(struct smb_rqst *rqst) 365638c8a9a5SSteve French { 365738c8a9a5SSteve French if (rqst && rqst->rq_iov) 36583b5f0d0aSPaulo Alcantara cifs_buf_release(rqst->rq_iov[0].iov_base); /* request */ 365938c8a9a5SSteve French } 366038c8a9a5SSteve French 366138c8a9a5SSteve French static int 366238c8a9a5SSteve French query_info(const unsigned int xid, struct cifs_tcon *tcon, 366338c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, u8 info_class, u8 info_type, 366438c8a9a5SSteve French u32 additional_info, size_t output_len, size_t min_len, void **data, 366538c8a9a5SSteve French u32 *dlen) 366638c8a9a5SSteve French { 366738c8a9a5SSteve French struct smb_rqst rqst; 366838c8a9a5SSteve French struct smb2_query_info_rsp *rsp = NULL; 366938c8a9a5SSteve French struct kvec iov[1]; 367038c8a9a5SSteve French struct kvec rsp_iov; 367138c8a9a5SSteve French int rc = 0; 367238c8a9a5SSteve French int resp_buftype = CIFS_NO_BUFFER; 367338c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 367438c8a9a5SSteve French struct TCP_Server_Info *server; 367538c8a9a5SSteve French int flags = 0; 367638c8a9a5SSteve French bool allocated = false; 367738c8a9a5SSteve French 367838c8a9a5SSteve French cifs_dbg(FYI, "Query Info\n"); 367938c8a9a5SSteve French 368038c8a9a5SSteve French if (!ses) 368138c8a9a5SSteve French return -EIO; 368238c8a9a5SSteve French server = cifs_pick_channel(ses); 368338c8a9a5SSteve French if (!server) 368438c8a9a5SSteve French return -EIO; 368538c8a9a5SSteve French 368638c8a9a5SSteve French if (smb3_encryption_required(tcon)) 368738c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 368838c8a9a5SSteve French 368938c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 369038c8a9a5SSteve French memset(&iov, 0, sizeof(iov)); 369138c8a9a5SSteve French rqst.rq_iov = iov; 369238c8a9a5SSteve French rqst.rq_nvec = 1; 369338c8a9a5SSteve French 369438c8a9a5SSteve French rc = SMB2_query_info_init(tcon, server, 369538c8a9a5SSteve French &rqst, persistent_fid, volatile_fid, 369638c8a9a5SSteve French info_class, info_type, additional_info, 369738c8a9a5SSteve French output_len, 0, NULL); 369838c8a9a5SSteve French if (rc) 369938c8a9a5SSteve French goto qinf_exit; 370038c8a9a5SSteve French 370138c8a9a5SSteve French trace_smb3_query_info_enter(xid, persistent_fid, tcon->tid, 370238c8a9a5SSteve French ses->Suid, info_class, (__u32)info_type); 370338c8a9a5SSteve French 370438c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 370538c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 370638c8a9a5SSteve French rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 370738c8a9a5SSteve French 370838c8a9a5SSteve French if (rc) { 370938c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); 371038c8a9a5SSteve French trace_smb3_query_info_err(xid, persistent_fid, tcon->tid, 371138c8a9a5SSteve French ses->Suid, info_class, (__u32)info_type, rc); 371238c8a9a5SSteve French goto qinf_exit; 371338c8a9a5SSteve French } 371438c8a9a5SSteve French 371538c8a9a5SSteve French trace_smb3_query_info_done(xid, persistent_fid, tcon->tid, 371638c8a9a5SSteve French ses->Suid, info_class, (__u32)info_type); 371738c8a9a5SSteve French 371838c8a9a5SSteve French if (dlen) { 371938c8a9a5SSteve French *dlen = le32_to_cpu(rsp->OutputBufferLength); 372038c8a9a5SSteve French if (!*data) { 372138c8a9a5SSteve French *data = kmalloc(*dlen, GFP_KERNEL); 372238c8a9a5SSteve French if (!*data) { 372338c8a9a5SSteve French cifs_tcon_dbg(VFS, 372438c8a9a5SSteve French "Error %d allocating memory for acl\n", 372538c8a9a5SSteve French rc); 372638c8a9a5SSteve French *dlen = 0; 372738c8a9a5SSteve French rc = -ENOMEM; 372838c8a9a5SSteve French goto qinf_exit; 372938c8a9a5SSteve French } 373038c8a9a5SSteve French allocated = true; 373138c8a9a5SSteve French } 373238c8a9a5SSteve French } 373338c8a9a5SSteve French 373438c8a9a5SSteve French rc = smb2_validate_and_copy_iov(le16_to_cpu(rsp->OutputBufferOffset), 373538c8a9a5SSteve French le32_to_cpu(rsp->OutputBufferLength), 373638c8a9a5SSteve French &rsp_iov, dlen ? *dlen : min_len, *data); 373738c8a9a5SSteve French if (rc && allocated) { 373838c8a9a5SSteve French kfree(*data); 373938c8a9a5SSteve French *data = NULL; 374038c8a9a5SSteve French *dlen = 0; 374138c8a9a5SSteve French } 374238c8a9a5SSteve French 374338c8a9a5SSteve French qinf_exit: 374438c8a9a5SSteve French SMB2_query_info_free(&rqst); 374538c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp); 374638c8a9a5SSteve French return rc; 374738c8a9a5SSteve French } 374838c8a9a5SSteve French 374938c8a9a5SSteve French int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon, 375038c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, struct smb2_file_all_info *data) 375138c8a9a5SSteve French { 375238c8a9a5SSteve French return query_info(xid, tcon, persistent_fid, volatile_fid, 375338c8a9a5SSteve French FILE_ALL_INFORMATION, SMB2_O_INFO_FILE, 0, 375438c8a9a5SSteve French sizeof(struct smb2_file_all_info) + PATH_MAX * 2, 375538c8a9a5SSteve French sizeof(struct smb2_file_all_info), (void **)&data, 375638c8a9a5SSteve French NULL); 375738c8a9a5SSteve French } 375838c8a9a5SSteve French 375938c8a9a5SSteve French #if 0 376038c8a9a5SSteve French /* currently unused, as now we are doing compounding instead (see smb311_posix_query_path_info) */ 376138c8a9a5SSteve French int 376238c8a9a5SSteve French SMB311_posix_query_info(const unsigned int xid, struct cifs_tcon *tcon, 376338c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, struct smb311_posix_qinfo *data, u32 *plen) 376438c8a9a5SSteve French { 376538c8a9a5SSteve French size_t output_len = sizeof(struct smb311_posix_qinfo *) + 376638c8a9a5SSteve French (sizeof(struct cifs_sid) * 2) + (PATH_MAX * 2); 376738c8a9a5SSteve French *plen = 0; 376838c8a9a5SSteve French 376938c8a9a5SSteve French return query_info(xid, tcon, persistent_fid, volatile_fid, 377038c8a9a5SSteve French SMB_FIND_FILE_POSIX_INFO, SMB2_O_INFO_FILE, 0, 377138c8a9a5SSteve French output_len, sizeof(struct smb311_posix_qinfo), (void **)&data, plen); 377238c8a9a5SSteve French /* Note caller must free "data" (passed in above). It may be allocated in query_info call */ 377338c8a9a5SSteve French } 377438c8a9a5SSteve French #endif 377538c8a9a5SSteve French 377638c8a9a5SSteve French int 377738c8a9a5SSteve French SMB2_query_acl(const unsigned int xid, struct cifs_tcon *tcon, 377838c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, 377938c8a9a5SSteve French void **data, u32 *plen, u32 extra_info) 378038c8a9a5SSteve French { 378138c8a9a5SSteve French __u32 additional_info = OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO | 378238c8a9a5SSteve French extra_info; 378338c8a9a5SSteve French *plen = 0; 378438c8a9a5SSteve French 378538c8a9a5SSteve French return query_info(xid, tcon, persistent_fid, volatile_fid, 378638c8a9a5SSteve French 0, SMB2_O_INFO_SECURITY, additional_info, 378738c8a9a5SSteve French SMB2_MAX_BUFFER_SIZE, MIN_SEC_DESC_LEN, data, plen); 378838c8a9a5SSteve French } 378938c8a9a5SSteve French 379038c8a9a5SSteve French int 379138c8a9a5SSteve French SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon, 379238c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid) 379338c8a9a5SSteve French { 379438c8a9a5SSteve French return query_info(xid, tcon, persistent_fid, volatile_fid, 379538c8a9a5SSteve French FILE_INTERNAL_INFORMATION, SMB2_O_INFO_FILE, 0, 379638c8a9a5SSteve French sizeof(struct smb2_file_internal_info), 379738c8a9a5SSteve French sizeof(struct smb2_file_internal_info), 379838c8a9a5SSteve French (void **)&uniqueid, NULL); 379938c8a9a5SSteve French } 380038c8a9a5SSteve French 380138c8a9a5SSteve French /* 380238c8a9a5SSteve French * CHANGE_NOTIFY Request is sent to get notifications on changes to a directory 380338c8a9a5SSteve French * See MS-SMB2 2.2.35 and 2.2.36 380438c8a9a5SSteve French */ 380538c8a9a5SSteve French 380638c8a9a5SSteve French static int 380738c8a9a5SSteve French SMB2_notify_init(const unsigned int xid, struct smb_rqst *rqst, 380838c8a9a5SSteve French struct cifs_tcon *tcon, struct TCP_Server_Info *server, 380938c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, 381038c8a9a5SSteve French u32 completion_filter, bool watch_tree) 381138c8a9a5SSteve French { 381238c8a9a5SSteve French struct smb2_change_notify_req *req; 381338c8a9a5SSteve French struct kvec *iov = rqst->rq_iov; 381438c8a9a5SSteve French unsigned int total_len; 381538c8a9a5SSteve French int rc; 381638c8a9a5SSteve French 381738c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_CHANGE_NOTIFY, tcon, server, 381838c8a9a5SSteve French (void **) &req, &total_len); 381938c8a9a5SSteve French if (rc) 382038c8a9a5SSteve French return rc; 382138c8a9a5SSteve French 382238c8a9a5SSteve French req->PersistentFileId = persistent_fid; 382338c8a9a5SSteve French req->VolatileFileId = volatile_fid; 382438c8a9a5SSteve French /* See note 354 of MS-SMB2, 64K max */ 382538c8a9a5SSteve French req->OutputBufferLength = 382638c8a9a5SSteve French cpu_to_le32(SMB2_MAX_BUFFER_SIZE - MAX_SMB2_HDR_SIZE); 382738c8a9a5SSteve French req->CompletionFilter = cpu_to_le32(completion_filter); 382838c8a9a5SSteve French if (watch_tree) 382938c8a9a5SSteve French req->Flags = cpu_to_le16(SMB2_WATCH_TREE); 383038c8a9a5SSteve French else 383138c8a9a5SSteve French req->Flags = 0; 383238c8a9a5SSteve French 383338c8a9a5SSteve French iov[0].iov_base = (char *)req; 383438c8a9a5SSteve French iov[0].iov_len = total_len; 383538c8a9a5SSteve French 383638c8a9a5SSteve French return 0; 383738c8a9a5SSteve French } 383838c8a9a5SSteve French 383938c8a9a5SSteve French int 384038c8a9a5SSteve French SMB2_change_notify(const unsigned int xid, struct cifs_tcon *tcon, 384138c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, bool watch_tree, 384238c8a9a5SSteve French u32 completion_filter, u32 max_out_data_len, char **out_data, 384338c8a9a5SSteve French u32 *plen /* returned data len */) 384438c8a9a5SSteve French { 384538c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 384638c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 384738c8a9a5SSteve French struct smb_rqst rqst; 384838c8a9a5SSteve French struct smb2_change_notify_rsp *smb_rsp; 384938c8a9a5SSteve French struct kvec iov[1]; 385038c8a9a5SSteve French struct kvec rsp_iov = {NULL, 0}; 385138c8a9a5SSteve French int resp_buftype = CIFS_NO_BUFFER; 385238c8a9a5SSteve French int flags = 0; 385338c8a9a5SSteve French int rc = 0; 385438c8a9a5SSteve French 385538c8a9a5SSteve French cifs_dbg(FYI, "change notify\n"); 385638c8a9a5SSteve French if (!ses || !server) 385738c8a9a5SSteve French return -EIO; 385838c8a9a5SSteve French 385938c8a9a5SSteve French if (smb3_encryption_required(tcon)) 386038c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 386138c8a9a5SSteve French 386238c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 386338c8a9a5SSteve French memset(&iov, 0, sizeof(iov)); 386438c8a9a5SSteve French if (plen) 386538c8a9a5SSteve French *plen = 0; 386638c8a9a5SSteve French 386738c8a9a5SSteve French rqst.rq_iov = iov; 386838c8a9a5SSteve French rqst.rq_nvec = 1; 386938c8a9a5SSteve French 387038c8a9a5SSteve French rc = SMB2_notify_init(xid, &rqst, tcon, server, 387138c8a9a5SSteve French persistent_fid, volatile_fid, 387238c8a9a5SSteve French completion_filter, watch_tree); 387338c8a9a5SSteve French if (rc) 387438c8a9a5SSteve French goto cnotify_exit; 387538c8a9a5SSteve French 387638c8a9a5SSteve French trace_smb3_notify_enter(xid, persistent_fid, tcon->tid, ses->Suid, 387738c8a9a5SSteve French (u8)watch_tree, completion_filter); 387838c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 387938c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 388038c8a9a5SSteve French 388138c8a9a5SSteve French if (rc != 0) { 388238c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_CHANGE_NOTIFY_HE); 388338c8a9a5SSteve French trace_smb3_notify_err(xid, persistent_fid, tcon->tid, ses->Suid, 388438c8a9a5SSteve French (u8)watch_tree, completion_filter, rc); 388538c8a9a5SSteve French } else { 388638c8a9a5SSteve French trace_smb3_notify_done(xid, persistent_fid, tcon->tid, 388738c8a9a5SSteve French ses->Suid, (u8)watch_tree, completion_filter); 388838c8a9a5SSteve French /* validate that notify information is plausible */ 388938c8a9a5SSteve French if ((rsp_iov.iov_base == NULL) || 389038c8a9a5SSteve French (rsp_iov.iov_len < sizeof(struct smb2_change_notify_rsp) + 1)) 389138c8a9a5SSteve French goto cnotify_exit; 389238c8a9a5SSteve French 389338c8a9a5SSteve French smb_rsp = (struct smb2_change_notify_rsp *)rsp_iov.iov_base; 389438c8a9a5SSteve French 389538c8a9a5SSteve French smb2_validate_iov(le16_to_cpu(smb_rsp->OutputBufferOffset), 389638c8a9a5SSteve French le32_to_cpu(smb_rsp->OutputBufferLength), &rsp_iov, 389738c8a9a5SSteve French sizeof(struct file_notify_information)); 389838c8a9a5SSteve French 389938c8a9a5SSteve French *out_data = kmemdup((char *)smb_rsp + le16_to_cpu(smb_rsp->OutputBufferOffset), 390038c8a9a5SSteve French le32_to_cpu(smb_rsp->OutputBufferLength), GFP_KERNEL); 390138c8a9a5SSteve French if (*out_data == NULL) { 390238c8a9a5SSteve French rc = -ENOMEM; 390338c8a9a5SSteve French goto cnotify_exit; 3904b535cc79SSteve French } else if (plen) 390538c8a9a5SSteve French *plen = le32_to_cpu(smb_rsp->OutputBufferLength); 390638c8a9a5SSteve French } 390738c8a9a5SSteve French 390838c8a9a5SSteve French cnotify_exit: 390938c8a9a5SSteve French if (rqst.rq_iov) 391038c8a9a5SSteve French cifs_small_buf_release(rqst.rq_iov[0].iov_base); /* request */ 391138c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp_iov.iov_base); 391238c8a9a5SSteve French return rc; 391338c8a9a5SSteve French } 391438c8a9a5SSteve French 391538c8a9a5SSteve French 391638c8a9a5SSteve French 391738c8a9a5SSteve French /* 391838c8a9a5SSteve French * This is a no-op for now. We're not really interested in the reply, but 391938c8a9a5SSteve French * rather in the fact that the server sent one and that server->lstrp 392038c8a9a5SSteve French * gets updated. 392138c8a9a5SSteve French * 392238c8a9a5SSteve French * FIXME: maybe we should consider checking that the reply matches request? 392338c8a9a5SSteve French */ 392438c8a9a5SSteve French static void 392538c8a9a5SSteve French smb2_echo_callback(struct mid_q_entry *mid) 392638c8a9a5SSteve French { 392738c8a9a5SSteve French struct TCP_Server_Info *server = mid->callback_data; 392838c8a9a5SSteve French struct smb2_echo_rsp *rsp = (struct smb2_echo_rsp *)mid->resp_buf; 392938c8a9a5SSteve French struct cifs_credits credits = { .value = 0, .instance = 0 }; 393038c8a9a5SSteve French 393138c8a9a5SSteve French if (mid->mid_state == MID_RESPONSE_RECEIVED 393238c8a9a5SSteve French || mid->mid_state == MID_RESPONSE_MALFORMED) { 393338c8a9a5SSteve French credits.value = le16_to_cpu(rsp->hdr.CreditRequest); 393438c8a9a5SSteve French credits.instance = server->reconnect_instance; 393538c8a9a5SSteve French } 393638c8a9a5SSteve French 393738c8a9a5SSteve French release_mid(mid); 393838c8a9a5SSteve French add_credits(server, &credits, CIFS_ECHO_OP); 393938c8a9a5SSteve French } 394038c8a9a5SSteve French 394138c8a9a5SSteve French void smb2_reconnect_server(struct work_struct *work) 394238c8a9a5SSteve French { 394338c8a9a5SSteve French struct TCP_Server_Info *server = container_of(work, 394438c8a9a5SSteve French struct TCP_Server_Info, reconnect.work); 394538c8a9a5SSteve French struct TCP_Server_Info *pserver; 394638c8a9a5SSteve French struct cifs_ses *ses, *ses2; 394738c8a9a5SSteve French struct cifs_tcon *tcon, *tcon2; 394838c8a9a5SSteve French struct list_head tmp_list, tmp_ses_list; 394938c8a9a5SSteve French bool tcon_exist = false, ses_exist = false; 395038c8a9a5SSteve French bool tcon_selected = false; 395138c8a9a5SSteve French int rc; 395238c8a9a5SSteve French bool resched = false; 395338c8a9a5SSteve French 395407e86408SShyam Prasad N /* first check if ref count has reached 0, if not inc ref count */ 395507e86408SShyam Prasad N spin_lock(&cifs_tcp_ses_lock); 395607e86408SShyam Prasad N if (!server->srv_count) { 395707e86408SShyam Prasad N spin_unlock(&cifs_tcp_ses_lock); 395807e86408SShyam Prasad N return; 395907e86408SShyam Prasad N } 396007e86408SShyam Prasad N server->srv_count++; 396107e86408SShyam Prasad N spin_unlock(&cifs_tcp_ses_lock); 396207e86408SShyam Prasad N 396338c8a9a5SSteve French /* If server is a channel, select the primary channel */ 3964b3773b19SSteve French pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 396538c8a9a5SSteve French 396638c8a9a5SSteve French /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */ 396738c8a9a5SSteve French mutex_lock(&pserver->reconnect_mutex); 396838c8a9a5SSteve French 39693e161536SShyam Prasad N /* if the server is marked for termination, drop the ref count here */ 39703e161536SShyam Prasad N if (server->terminate) { 39713e161536SShyam Prasad N cifs_put_tcp_session(server, true); 39723e161536SShyam Prasad N mutex_unlock(&pserver->reconnect_mutex); 39733e161536SShyam Prasad N return; 39743e161536SShyam Prasad N } 39753e161536SShyam Prasad N 397638c8a9a5SSteve French INIT_LIST_HEAD(&tmp_list); 397738c8a9a5SSteve French INIT_LIST_HEAD(&tmp_ses_list); 397838c8a9a5SSteve French cifs_dbg(FYI, "Reconnecting tcons and channels\n"); 397938c8a9a5SSteve French 398038c8a9a5SSteve French spin_lock(&cifs_tcp_ses_lock); 398138c8a9a5SSteve French list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 398299f28070SWinston Wen spin_lock(&ses->ses_lock); 398399f28070SWinston Wen if (ses->ses_status == SES_EXITING) { 398499f28070SWinston Wen spin_unlock(&ses->ses_lock); 398599f28070SWinston Wen continue; 398699f28070SWinston Wen } 398799f28070SWinston Wen spin_unlock(&ses->ses_lock); 398838c8a9a5SSteve French 398938c8a9a5SSteve French tcon_selected = false; 399038c8a9a5SSteve French 399138c8a9a5SSteve French list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 399238c8a9a5SSteve French if (tcon->need_reconnect || tcon->need_reopen_files) { 399338c8a9a5SSteve French tcon->tc_count++; 399438c8a9a5SSteve French list_add_tail(&tcon->rlist, &tmp_list); 399538c8a9a5SSteve French tcon_selected = tcon_exist = true; 399638c8a9a5SSteve French } 399738c8a9a5SSteve French } 399838c8a9a5SSteve French /* 399938c8a9a5SSteve French * IPC has the same lifetime as its session and uses its 400038c8a9a5SSteve French * refcount. 400138c8a9a5SSteve French */ 400238c8a9a5SSteve French if (ses->tcon_ipc && ses->tcon_ipc->need_reconnect) { 400338c8a9a5SSteve French list_add_tail(&ses->tcon_ipc->rlist, &tmp_list); 400438c8a9a5SSteve French tcon_selected = tcon_exist = true; 400538c8a9a5SSteve French cifs_smb_ses_inc_refcount(ses); 400638c8a9a5SSteve French } 400738c8a9a5SSteve French /* 400838c8a9a5SSteve French * handle the case where channel needs to reconnect 400938c8a9a5SSteve French * binding session, but tcon is healthy (some other channel 401038c8a9a5SSteve French * is active) 401138c8a9a5SSteve French */ 401238c8a9a5SSteve French spin_lock(&ses->chan_lock); 401338c8a9a5SSteve French if (!tcon_selected && cifs_chan_needs_reconnect(ses, server)) { 401438c8a9a5SSteve French list_add_tail(&ses->rlist, &tmp_ses_list); 401538c8a9a5SSteve French ses_exist = true; 401638c8a9a5SSteve French cifs_smb_ses_inc_refcount(ses); 401738c8a9a5SSteve French } 401838c8a9a5SSteve French spin_unlock(&ses->chan_lock); 401938c8a9a5SSteve French } 402038c8a9a5SSteve French spin_unlock(&cifs_tcp_ses_lock); 402138c8a9a5SSteve French 402238c8a9a5SSteve French list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) { 402307e86408SShyam Prasad N rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon, server, true); 402438c8a9a5SSteve French if (!rc) 402538c8a9a5SSteve French cifs_reopen_persistent_handles(tcon); 402638c8a9a5SSteve French else 402738c8a9a5SSteve French resched = true; 402838c8a9a5SSteve French list_del_init(&tcon->rlist); 402938c8a9a5SSteve French if (tcon->ipc) 403038c8a9a5SSteve French cifs_put_smb_ses(tcon->ses); 403138c8a9a5SSteve French else 403238c8a9a5SSteve French cifs_put_tcon(tcon); 403338c8a9a5SSteve French } 403438c8a9a5SSteve French 403538c8a9a5SSteve French if (!ses_exist) 403638c8a9a5SSteve French goto done; 403738c8a9a5SSteve French 403838c8a9a5SSteve French /* allocate a dummy tcon struct used for reconnect */ 40392da338ffSSteve French tcon = tcon_info_alloc(false); 404038c8a9a5SSteve French if (!tcon) { 404138c8a9a5SSteve French resched = true; 404238c8a9a5SSteve French list_for_each_entry_safe(ses, ses2, &tmp_ses_list, rlist) { 404338c8a9a5SSteve French list_del_init(&ses->rlist); 404438c8a9a5SSteve French cifs_put_smb_ses(ses); 404538c8a9a5SSteve French } 404638c8a9a5SSteve French goto done; 404738c8a9a5SSteve French } 404838c8a9a5SSteve French 404938c8a9a5SSteve French tcon->status = TID_GOOD; 405038c8a9a5SSteve French tcon->retry = false; 405138c8a9a5SSteve French tcon->need_reconnect = false; 405238c8a9a5SSteve French 405338c8a9a5SSteve French /* now reconnect sessions for necessary channels */ 405438c8a9a5SSteve French list_for_each_entry_safe(ses, ses2, &tmp_ses_list, rlist) { 405538c8a9a5SSteve French tcon->ses = ses; 405607e86408SShyam Prasad N rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon, server, true); 405738c8a9a5SSteve French if (rc) 405838c8a9a5SSteve French resched = true; 405938c8a9a5SSteve French list_del_init(&ses->rlist); 406038c8a9a5SSteve French cifs_put_smb_ses(ses); 406138c8a9a5SSteve French } 406238c8a9a5SSteve French tconInfoFree(tcon); 406338c8a9a5SSteve French 406438c8a9a5SSteve French done: 406538c8a9a5SSteve French cifs_dbg(FYI, "Reconnecting tcons and channels finished\n"); 40663a0ef868SShyam Prasad N if (resched) 406738c8a9a5SSteve French queue_delayed_work(cifsiod_wq, &server->reconnect, 2 * HZ); 406838c8a9a5SSteve French mutex_unlock(&pserver->reconnect_mutex); 406938c8a9a5SSteve French 407038c8a9a5SSteve French /* now we can safely release srv struct */ 407107e86408SShyam Prasad N cifs_put_tcp_session(server, true); 407238c8a9a5SSteve French } 407338c8a9a5SSteve French 407438c8a9a5SSteve French int 407538c8a9a5SSteve French SMB2_echo(struct TCP_Server_Info *server) 407638c8a9a5SSteve French { 407738c8a9a5SSteve French struct smb2_echo_req *req; 407838c8a9a5SSteve French int rc = 0; 407938c8a9a5SSteve French struct kvec iov[1]; 408038c8a9a5SSteve French struct smb_rqst rqst = { .rq_iov = iov, 408138c8a9a5SSteve French .rq_nvec = 1 }; 408238c8a9a5SSteve French unsigned int total_len; 408338c8a9a5SSteve French 408438c8a9a5SSteve French cifs_dbg(FYI, "In echo request for conn_id %lld\n", server->conn_id); 408538c8a9a5SSteve French 408638c8a9a5SSteve French spin_lock(&server->srv_lock); 408738c8a9a5SSteve French if (server->ops->need_neg && 408838c8a9a5SSteve French server->ops->need_neg(server)) { 408938c8a9a5SSteve French spin_unlock(&server->srv_lock); 409038c8a9a5SSteve French /* No need to send echo on newly established connections */ 40913a0ef868SShyam Prasad N mod_delayed_work(cifsiod_wq, &server->reconnect, 0); 409238c8a9a5SSteve French return rc; 409338c8a9a5SSteve French } 409438c8a9a5SSteve French spin_unlock(&server->srv_lock); 409538c8a9a5SSteve French 409638c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_ECHO, NULL, server, 409738c8a9a5SSteve French (void **)&req, &total_len); 409838c8a9a5SSteve French if (rc) 409938c8a9a5SSteve French return rc; 410038c8a9a5SSteve French 410138c8a9a5SSteve French req->hdr.CreditRequest = cpu_to_le16(1); 410238c8a9a5SSteve French 410338c8a9a5SSteve French iov[0].iov_len = total_len; 410438c8a9a5SSteve French iov[0].iov_base = (char *)req; 410538c8a9a5SSteve French 410638c8a9a5SSteve French rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL, 410738c8a9a5SSteve French server, CIFS_ECHO_OP, NULL); 410838c8a9a5SSteve French if (rc) 410938c8a9a5SSteve French cifs_dbg(FYI, "Echo request failed: %d\n", rc); 411038c8a9a5SSteve French 411138c8a9a5SSteve French cifs_small_buf_release(req); 411238c8a9a5SSteve French return rc; 411338c8a9a5SSteve French } 411438c8a9a5SSteve French 411538c8a9a5SSteve French void 411638c8a9a5SSteve French SMB2_flush_free(struct smb_rqst *rqst) 411738c8a9a5SSteve French { 411838c8a9a5SSteve French if (rqst && rqst->rq_iov) 411938c8a9a5SSteve French cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */ 412038c8a9a5SSteve French } 412138c8a9a5SSteve French 412238c8a9a5SSteve French int 412338c8a9a5SSteve French SMB2_flush_init(const unsigned int xid, struct smb_rqst *rqst, 412438c8a9a5SSteve French struct cifs_tcon *tcon, struct TCP_Server_Info *server, 412538c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid) 412638c8a9a5SSteve French { 412738c8a9a5SSteve French struct smb2_flush_req *req; 412838c8a9a5SSteve French struct kvec *iov = rqst->rq_iov; 412938c8a9a5SSteve French unsigned int total_len; 413038c8a9a5SSteve French int rc; 413138c8a9a5SSteve French 413238c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_FLUSH, tcon, server, 413338c8a9a5SSteve French (void **) &req, &total_len); 413438c8a9a5SSteve French if (rc) 413538c8a9a5SSteve French return rc; 413638c8a9a5SSteve French 413738c8a9a5SSteve French req->PersistentFileId = persistent_fid; 413838c8a9a5SSteve French req->VolatileFileId = volatile_fid; 413938c8a9a5SSteve French 414038c8a9a5SSteve French iov[0].iov_base = (char *)req; 414138c8a9a5SSteve French iov[0].iov_len = total_len; 414238c8a9a5SSteve French 414338c8a9a5SSteve French return 0; 414438c8a9a5SSteve French } 414538c8a9a5SSteve French 414638c8a9a5SSteve French int 414738c8a9a5SSteve French SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, 414838c8a9a5SSteve French u64 volatile_fid) 414938c8a9a5SSteve French { 415038c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 415138c8a9a5SSteve French struct smb_rqst rqst; 415238c8a9a5SSteve French struct kvec iov[1]; 415338c8a9a5SSteve French struct kvec rsp_iov = {NULL, 0}; 415438c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 415538c8a9a5SSteve French int resp_buftype = CIFS_NO_BUFFER; 415638c8a9a5SSteve French int flags = 0; 415738c8a9a5SSteve French int rc = 0; 415838c8a9a5SSteve French 415938c8a9a5SSteve French cifs_dbg(FYI, "flush\n"); 416038c8a9a5SSteve French if (!ses || !(ses->server)) 416138c8a9a5SSteve French return -EIO; 416238c8a9a5SSteve French 416338c8a9a5SSteve French if (smb3_encryption_required(tcon)) 416438c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 416538c8a9a5SSteve French 416638c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 416738c8a9a5SSteve French memset(&iov, 0, sizeof(iov)); 416838c8a9a5SSteve French rqst.rq_iov = iov; 416938c8a9a5SSteve French rqst.rq_nvec = 1; 417038c8a9a5SSteve French 417138c8a9a5SSteve French rc = SMB2_flush_init(xid, &rqst, tcon, server, 417238c8a9a5SSteve French persistent_fid, volatile_fid); 417338c8a9a5SSteve French if (rc) 417438c8a9a5SSteve French goto flush_exit; 417538c8a9a5SSteve French 417638c8a9a5SSteve French trace_smb3_flush_enter(xid, persistent_fid, tcon->tid, ses->Suid); 417738c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 417838c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 417938c8a9a5SSteve French 418038c8a9a5SSteve French if (rc != 0) { 418138c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE); 418238c8a9a5SSteve French trace_smb3_flush_err(xid, persistent_fid, tcon->tid, ses->Suid, 418338c8a9a5SSteve French rc); 418438c8a9a5SSteve French } else 418538c8a9a5SSteve French trace_smb3_flush_done(xid, persistent_fid, tcon->tid, 418638c8a9a5SSteve French ses->Suid); 418738c8a9a5SSteve French 418838c8a9a5SSteve French flush_exit: 418938c8a9a5SSteve French SMB2_flush_free(&rqst); 419038c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp_iov.iov_base); 419138c8a9a5SSteve French return rc; 419238c8a9a5SSteve French } 419338c8a9a5SSteve French 419438c8a9a5SSteve French #ifdef CONFIG_CIFS_SMB_DIRECT 419538c8a9a5SSteve French static inline bool smb3_use_rdma_offload(struct cifs_io_parms *io_parms) 419638c8a9a5SSteve French { 419738c8a9a5SSteve French struct TCP_Server_Info *server = io_parms->server; 419838c8a9a5SSteve French struct cifs_tcon *tcon = io_parms->tcon; 419938c8a9a5SSteve French 420038c8a9a5SSteve French /* we can only offload if we're connected */ 420138c8a9a5SSteve French if (!server || !tcon) 420238c8a9a5SSteve French return false; 420338c8a9a5SSteve French 420438c8a9a5SSteve French /* we can only offload on an rdma connection */ 420538c8a9a5SSteve French if (!server->rdma || !server->smbd_conn) 420638c8a9a5SSteve French return false; 420738c8a9a5SSteve French 420838c8a9a5SSteve French /* we don't support signed offload yet */ 420938c8a9a5SSteve French if (server->sign) 421038c8a9a5SSteve French return false; 421138c8a9a5SSteve French 421238c8a9a5SSteve French /* we don't support encrypted offload yet */ 421338c8a9a5SSteve French if (smb3_encryption_required(tcon)) 421438c8a9a5SSteve French return false; 421538c8a9a5SSteve French 421638c8a9a5SSteve French /* offload also has its overhead, so only do it if desired */ 421738c8a9a5SSteve French if (io_parms->length < server->smbd_conn->rdma_readwrite_threshold) 421838c8a9a5SSteve French return false; 421938c8a9a5SSteve French 422038c8a9a5SSteve French return true; 422138c8a9a5SSteve French } 422238c8a9a5SSteve French #endif /* CONFIG_CIFS_SMB_DIRECT */ 422338c8a9a5SSteve French 422438c8a9a5SSteve French /* 422538c8a9a5SSteve French * To form a chain of read requests, any read requests after the first should 422638c8a9a5SSteve French * have the end_of_chain boolean set to true. 422738c8a9a5SSteve French */ 422838c8a9a5SSteve French static int 422938c8a9a5SSteve French smb2_new_read_req(void **buf, unsigned int *total_len, 423038c8a9a5SSteve French struct cifs_io_parms *io_parms, struct cifs_readdata *rdata, 423138c8a9a5SSteve French unsigned int remaining_bytes, int request_type) 423238c8a9a5SSteve French { 423338c8a9a5SSteve French int rc = -EACCES; 423438c8a9a5SSteve French struct smb2_read_req *req = NULL; 423538c8a9a5SSteve French struct smb2_hdr *shdr; 423638c8a9a5SSteve French struct TCP_Server_Info *server = io_parms->server; 423738c8a9a5SSteve French 423838c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, server, 423938c8a9a5SSteve French (void **) &req, total_len); 424038c8a9a5SSteve French if (rc) 424138c8a9a5SSteve French return rc; 424238c8a9a5SSteve French 424338c8a9a5SSteve French if (server == NULL) 424438c8a9a5SSteve French return -ECONNABORTED; 424538c8a9a5SSteve French 424638c8a9a5SSteve French shdr = &req->hdr; 424738c8a9a5SSteve French shdr->Id.SyncId.ProcessId = cpu_to_le32(io_parms->pid); 424838c8a9a5SSteve French 424938c8a9a5SSteve French req->PersistentFileId = io_parms->persistent_fid; 425038c8a9a5SSteve French req->VolatileFileId = io_parms->volatile_fid; 425138c8a9a5SSteve French req->ReadChannelInfoOffset = 0; /* reserved */ 425238c8a9a5SSteve French req->ReadChannelInfoLength = 0; /* reserved */ 425338c8a9a5SSteve French req->Channel = 0; /* reserved */ 425438c8a9a5SSteve French req->MinimumCount = 0; 425538c8a9a5SSteve French req->Length = cpu_to_le32(io_parms->length); 425638c8a9a5SSteve French req->Offset = cpu_to_le64(io_parms->offset); 425738c8a9a5SSteve French 425838c8a9a5SSteve French trace_smb3_read_enter(0 /* xid */, 425938c8a9a5SSteve French io_parms->persistent_fid, 426038c8a9a5SSteve French io_parms->tcon->tid, io_parms->tcon->ses->Suid, 426138c8a9a5SSteve French io_parms->offset, io_parms->length); 426238c8a9a5SSteve French #ifdef CONFIG_CIFS_SMB_DIRECT 426338c8a9a5SSteve French /* 426438c8a9a5SSteve French * If we want to do a RDMA write, fill in and append 426538c8a9a5SSteve French * smbd_buffer_descriptor_v1 to the end of read request 426638c8a9a5SSteve French */ 426738c8a9a5SSteve French if (smb3_use_rdma_offload(io_parms)) { 426838c8a9a5SSteve French struct smbd_buffer_descriptor_v1 *v1; 426938c8a9a5SSteve French bool need_invalidate = server->dialect == SMB30_PROT_ID; 427038c8a9a5SSteve French 427138c8a9a5SSteve French rdata->mr = smbd_register_mr(server->smbd_conn, &rdata->iter, 427238c8a9a5SSteve French true, need_invalidate); 427338c8a9a5SSteve French if (!rdata->mr) 427438c8a9a5SSteve French return -EAGAIN; 427538c8a9a5SSteve French 427638c8a9a5SSteve French req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE; 427738c8a9a5SSteve French if (need_invalidate) 427838c8a9a5SSteve French req->Channel = SMB2_CHANNEL_RDMA_V1; 427938c8a9a5SSteve French req->ReadChannelInfoOffset = 428038c8a9a5SSteve French cpu_to_le16(offsetof(struct smb2_read_req, Buffer)); 428138c8a9a5SSteve French req->ReadChannelInfoLength = 428238c8a9a5SSteve French cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1)); 428338c8a9a5SSteve French v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0]; 428438c8a9a5SSteve French v1->offset = cpu_to_le64(rdata->mr->mr->iova); 428538c8a9a5SSteve French v1->token = cpu_to_le32(rdata->mr->mr->rkey); 428638c8a9a5SSteve French v1->length = cpu_to_le32(rdata->mr->mr->length); 428738c8a9a5SSteve French 428838c8a9a5SSteve French *total_len += sizeof(*v1) - 1; 428938c8a9a5SSteve French } 429038c8a9a5SSteve French #endif 429138c8a9a5SSteve French if (request_type & CHAINED_REQUEST) { 429238c8a9a5SSteve French if (!(request_type & END_OF_CHAIN)) { 429338c8a9a5SSteve French /* next 8-byte aligned request */ 429438c8a9a5SSteve French *total_len = ALIGN(*total_len, 8); 429538c8a9a5SSteve French shdr->NextCommand = cpu_to_le32(*total_len); 429638c8a9a5SSteve French } else /* END_OF_CHAIN */ 429738c8a9a5SSteve French shdr->NextCommand = 0; 429838c8a9a5SSteve French if (request_type & RELATED_REQUEST) { 429938c8a9a5SSteve French shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS; 430038c8a9a5SSteve French /* 430138c8a9a5SSteve French * Related requests use info from previous read request 430238c8a9a5SSteve French * in chain. 430338c8a9a5SSteve French */ 430438c8a9a5SSteve French shdr->SessionId = cpu_to_le64(0xFFFFFFFFFFFFFFFF); 430538c8a9a5SSteve French shdr->Id.SyncId.TreeId = cpu_to_le32(0xFFFFFFFF); 430638c8a9a5SSteve French req->PersistentFileId = (u64)-1; 430738c8a9a5SSteve French req->VolatileFileId = (u64)-1; 430838c8a9a5SSteve French } 430938c8a9a5SSteve French } 431038c8a9a5SSteve French if (remaining_bytes > io_parms->length) 431138c8a9a5SSteve French req->RemainingBytes = cpu_to_le32(remaining_bytes); 431238c8a9a5SSteve French else 431338c8a9a5SSteve French req->RemainingBytes = 0; 431438c8a9a5SSteve French 431538c8a9a5SSteve French *buf = req; 431638c8a9a5SSteve French return rc; 431738c8a9a5SSteve French } 431838c8a9a5SSteve French 431938c8a9a5SSteve French static void 432038c8a9a5SSteve French smb2_readv_callback(struct mid_q_entry *mid) 432138c8a9a5SSteve French { 432238c8a9a5SSteve French struct cifs_readdata *rdata = mid->callback_data; 432338c8a9a5SSteve French struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); 432438c8a9a5SSteve French struct TCP_Server_Info *server = rdata->server; 432538c8a9a5SSteve French struct smb2_hdr *shdr = 432638c8a9a5SSteve French (struct smb2_hdr *)rdata->iov[0].iov_base; 432738c8a9a5SSteve French struct cifs_credits credits = { .value = 0, .instance = 0 }; 432838c8a9a5SSteve French struct smb_rqst rqst = { .rq_iov = &rdata->iov[1], .rq_nvec = 1 }; 432938c8a9a5SSteve French 433038c8a9a5SSteve French if (rdata->got_bytes) { 433138c8a9a5SSteve French rqst.rq_iter = rdata->iter; 433238c8a9a5SSteve French rqst.rq_iter_size = iov_iter_count(&rdata->iter); 433338c8a9a5SSteve French } 433438c8a9a5SSteve French 433538c8a9a5SSteve French WARN_ONCE(rdata->server != mid->server, 433638c8a9a5SSteve French "rdata server %p != mid server %p", 433738c8a9a5SSteve French rdata->server, mid->server); 433838c8a9a5SSteve French 433938c8a9a5SSteve French cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n", 434038c8a9a5SSteve French __func__, mid->mid, mid->mid_state, rdata->result, 434138c8a9a5SSteve French rdata->bytes); 434238c8a9a5SSteve French 434338c8a9a5SSteve French switch (mid->mid_state) { 434438c8a9a5SSteve French case MID_RESPONSE_RECEIVED: 434538c8a9a5SSteve French credits.value = le16_to_cpu(shdr->CreditRequest); 434638c8a9a5SSteve French credits.instance = server->reconnect_instance; 434738c8a9a5SSteve French /* result already set, check signature */ 434838c8a9a5SSteve French if (server->sign && !mid->decrypted) { 434938c8a9a5SSteve French int rc; 435038c8a9a5SSteve French 435138c8a9a5SSteve French iov_iter_revert(&rqst.rq_iter, rdata->got_bytes); 435238c8a9a5SSteve French iov_iter_truncate(&rqst.rq_iter, rdata->got_bytes); 435338c8a9a5SSteve French rc = smb2_verify_signature(&rqst, server); 435438c8a9a5SSteve French if (rc) 435538c8a9a5SSteve French cifs_tcon_dbg(VFS, "SMB signature verification returned error = %d\n", 435638c8a9a5SSteve French rc); 435738c8a9a5SSteve French } 435838c8a9a5SSteve French /* FIXME: should this be counted toward the initiating task? */ 435938c8a9a5SSteve French task_io_account_read(rdata->got_bytes); 436038c8a9a5SSteve French cifs_stats_bytes_read(tcon, rdata->got_bytes); 436138c8a9a5SSteve French break; 436238c8a9a5SSteve French case MID_REQUEST_SUBMITTED: 436338c8a9a5SSteve French case MID_RETRY_NEEDED: 436438c8a9a5SSteve French rdata->result = -EAGAIN; 436538c8a9a5SSteve French if (server->sign && rdata->got_bytes) 436638c8a9a5SSteve French /* reset bytes number since we can not check a sign */ 436738c8a9a5SSteve French rdata->got_bytes = 0; 436838c8a9a5SSteve French /* FIXME: should this be counted toward the initiating task? */ 436938c8a9a5SSteve French task_io_account_read(rdata->got_bytes); 437038c8a9a5SSteve French cifs_stats_bytes_read(tcon, rdata->got_bytes); 437138c8a9a5SSteve French break; 437238c8a9a5SSteve French case MID_RESPONSE_MALFORMED: 437338c8a9a5SSteve French credits.value = le16_to_cpu(shdr->CreditRequest); 437438c8a9a5SSteve French credits.instance = server->reconnect_instance; 437538c8a9a5SSteve French fallthrough; 437638c8a9a5SSteve French default: 437738c8a9a5SSteve French rdata->result = -EIO; 437838c8a9a5SSteve French } 437938c8a9a5SSteve French #ifdef CONFIG_CIFS_SMB_DIRECT 438038c8a9a5SSteve French /* 438138c8a9a5SSteve French * If this rdata has a memmory registered, the MR can be freed 438238c8a9a5SSteve French * MR needs to be freed as soon as I/O finishes to prevent deadlock 438338c8a9a5SSteve French * because they have limited number and are used for future I/Os 438438c8a9a5SSteve French */ 438538c8a9a5SSteve French if (rdata->mr) { 438638c8a9a5SSteve French smbd_deregister_mr(rdata->mr); 438738c8a9a5SSteve French rdata->mr = NULL; 438838c8a9a5SSteve French } 438938c8a9a5SSteve French #endif 439038c8a9a5SSteve French if (rdata->result && rdata->result != -ENODATA) { 439138c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_READ_HE); 439238c8a9a5SSteve French trace_smb3_read_err(0 /* xid */, 439338c8a9a5SSteve French rdata->cfile->fid.persistent_fid, 439438c8a9a5SSteve French tcon->tid, tcon->ses->Suid, rdata->offset, 439538c8a9a5SSteve French rdata->bytes, rdata->result); 439638c8a9a5SSteve French } else 439738c8a9a5SSteve French trace_smb3_read_done(0 /* xid */, 439838c8a9a5SSteve French rdata->cfile->fid.persistent_fid, 439938c8a9a5SSteve French tcon->tid, tcon->ses->Suid, 440038c8a9a5SSteve French rdata->offset, rdata->got_bytes); 440138c8a9a5SSteve French 440238c8a9a5SSteve French queue_work(cifsiod_wq, &rdata->work); 440338c8a9a5SSteve French release_mid(mid); 440438c8a9a5SSteve French add_credits(server, &credits, 0); 440538c8a9a5SSteve French } 440638c8a9a5SSteve French 440738c8a9a5SSteve French /* smb2_async_readv - send an async read, and set up mid to handle result */ 440838c8a9a5SSteve French int 440938c8a9a5SSteve French smb2_async_readv(struct cifs_readdata *rdata) 441038c8a9a5SSteve French { 441138c8a9a5SSteve French int rc, flags = 0; 441238c8a9a5SSteve French char *buf; 441338c8a9a5SSteve French struct smb2_hdr *shdr; 441438c8a9a5SSteve French struct cifs_io_parms io_parms; 441538c8a9a5SSteve French struct smb_rqst rqst = { .rq_iov = rdata->iov, 441638c8a9a5SSteve French .rq_nvec = 1 }; 441738c8a9a5SSteve French struct TCP_Server_Info *server; 441838c8a9a5SSteve French struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); 441938c8a9a5SSteve French unsigned int total_len; 44205e90aa21SShyam Prasad N int credit_request; 442138c8a9a5SSteve French 442238c8a9a5SSteve French cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n", 442338c8a9a5SSteve French __func__, rdata->offset, rdata->bytes); 442438c8a9a5SSteve French 442538c8a9a5SSteve French if (!rdata->server) 442638c8a9a5SSteve French rdata->server = cifs_pick_channel(tcon->ses); 442738c8a9a5SSteve French 442838c8a9a5SSteve French io_parms.tcon = tlink_tcon(rdata->cfile->tlink); 442938c8a9a5SSteve French io_parms.server = server = rdata->server; 443038c8a9a5SSteve French io_parms.offset = rdata->offset; 443138c8a9a5SSteve French io_parms.length = rdata->bytes; 443238c8a9a5SSteve French io_parms.persistent_fid = rdata->cfile->fid.persistent_fid; 443338c8a9a5SSteve French io_parms.volatile_fid = rdata->cfile->fid.volatile_fid; 443438c8a9a5SSteve French io_parms.pid = rdata->pid; 443538c8a9a5SSteve French 443638c8a9a5SSteve French rc = smb2_new_read_req( 443738c8a9a5SSteve French (void **) &buf, &total_len, &io_parms, rdata, 0, 0); 443838c8a9a5SSteve French if (rc) 443938c8a9a5SSteve French return rc; 444038c8a9a5SSteve French 444138c8a9a5SSteve French if (smb3_encryption_required(io_parms.tcon)) 444238c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 444338c8a9a5SSteve French 444438c8a9a5SSteve French rdata->iov[0].iov_base = buf; 444538c8a9a5SSteve French rdata->iov[0].iov_len = total_len; 444638c8a9a5SSteve French 444738c8a9a5SSteve French shdr = (struct smb2_hdr *)buf; 444838c8a9a5SSteve French 444938c8a9a5SSteve French if (rdata->credits.value > 0) { 445038c8a9a5SSteve French shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes, 445138c8a9a5SSteve French SMB2_MAX_BUFFER_SIZE)); 44525e90aa21SShyam Prasad N credit_request = le16_to_cpu(shdr->CreditCharge) + 8; 44535e90aa21SShyam Prasad N if (server->credits >= server->max_credits) 44545e90aa21SShyam Prasad N shdr->CreditRequest = cpu_to_le16(0); 44555e90aa21SShyam Prasad N else 44565e90aa21SShyam Prasad N shdr->CreditRequest = cpu_to_le16( 44575e90aa21SShyam Prasad N min_t(int, server->max_credits - 44585e90aa21SShyam Prasad N server->credits, credit_request)); 445938c8a9a5SSteve French 446038c8a9a5SSteve French rc = adjust_credits(server, &rdata->credits, rdata->bytes); 446138c8a9a5SSteve French if (rc) 446238c8a9a5SSteve French goto async_readv_out; 446338c8a9a5SSteve French 446438c8a9a5SSteve French flags |= CIFS_HAS_CREDITS; 446538c8a9a5SSteve French } 446638c8a9a5SSteve French 446738c8a9a5SSteve French kref_get(&rdata->refcount); 446838c8a9a5SSteve French rc = cifs_call_async(server, &rqst, 446938c8a9a5SSteve French cifs_readv_receive, smb2_readv_callback, 447038c8a9a5SSteve French smb3_handle_read_data, rdata, flags, 447138c8a9a5SSteve French &rdata->credits); 447238c8a9a5SSteve French if (rc) { 447338c8a9a5SSteve French kref_put(&rdata->refcount, cifs_readdata_release); 447438c8a9a5SSteve French cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE); 447538c8a9a5SSteve French trace_smb3_read_err(0 /* xid */, io_parms.persistent_fid, 447638c8a9a5SSteve French io_parms.tcon->tid, 447738c8a9a5SSteve French io_parms.tcon->ses->Suid, 447838c8a9a5SSteve French io_parms.offset, io_parms.length, rc); 447938c8a9a5SSteve French } 448038c8a9a5SSteve French 448138c8a9a5SSteve French async_readv_out: 448238c8a9a5SSteve French cifs_small_buf_release(buf); 448338c8a9a5SSteve French return rc; 448438c8a9a5SSteve French } 448538c8a9a5SSteve French 448638c8a9a5SSteve French int 448738c8a9a5SSteve French SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms, 448838c8a9a5SSteve French unsigned int *nbytes, char **buf, int *buf_type) 448938c8a9a5SSteve French { 449038c8a9a5SSteve French struct smb_rqst rqst; 449138c8a9a5SSteve French int resp_buftype, rc; 449238c8a9a5SSteve French struct smb2_read_req *req = NULL; 449338c8a9a5SSteve French struct smb2_read_rsp *rsp = NULL; 449438c8a9a5SSteve French struct kvec iov[1]; 449538c8a9a5SSteve French struct kvec rsp_iov; 449638c8a9a5SSteve French unsigned int total_len; 449738c8a9a5SSteve French int flags = CIFS_LOG_ERROR; 449838c8a9a5SSteve French struct cifs_ses *ses = io_parms->tcon->ses; 449938c8a9a5SSteve French 450038c8a9a5SSteve French if (!io_parms->server) 450138c8a9a5SSteve French io_parms->server = cifs_pick_channel(io_parms->tcon->ses); 450238c8a9a5SSteve French 450338c8a9a5SSteve French *nbytes = 0; 450438c8a9a5SSteve French rc = smb2_new_read_req((void **)&req, &total_len, io_parms, NULL, 0, 0); 450538c8a9a5SSteve French if (rc) 450638c8a9a5SSteve French return rc; 450738c8a9a5SSteve French 450838c8a9a5SSteve French if (smb3_encryption_required(io_parms->tcon)) 450938c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 451038c8a9a5SSteve French 451138c8a9a5SSteve French iov[0].iov_base = (char *)req; 451238c8a9a5SSteve French iov[0].iov_len = total_len; 451338c8a9a5SSteve French 451438c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 451538c8a9a5SSteve French rqst.rq_iov = iov; 451638c8a9a5SSteve French rqst.rq_nvec = 1; 451738c8a9a5SSteve French 451838c8a9a5SSteve French rc = cifs_send_recv(xid, ses, io_parms->server, 451938c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 452038c8a9a5SSteve French rsp = (struct smb2_read_rsp *)rsp_iov.iov_base; 452138c8a9a5SSteve French 452238c8a9a5SSteve French if (rc) { 452338c8a9a5SSteve French if (rc != -ENODATA) { 452438c8a9a5SSteve French cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE); 452538c8a9a5SSteve French cifs_dbg(VFS, "Send error in read = %d\n", rc); 452638c8a9a5SSteve French trace_smb3_read_err(xid, 452738c8a9a5SSteve French req->PersistentFileId, 452838c8a9a5SSteve French io_parms->tcon->tid, ses->Suid, 452938c8a9a5SSteve French io_parms->offset, io_parms->length, 453038c8a9a5SSteve French rc); 453138c8a9a5SSteve French } else 453238c8a9a5SSteve French trace_smb3_read_done(xid, req->PersistentFileId, io_parms->tcon->tid, 453338c8a9a5SSteve French ses->Suid, io_parms->offset, 0); 453438c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp_iov.iov_base); 453538c8a9a5SSteve French cifs_small_buf_release(req); 453638c8a9a5SSteve French return rc == -ENODATA ? 0 : rc; 453738c8a9a5SSteve French } else 453838c8a9a5SSteve French trace_smb3_read_done(xid, 453938c8a9a5SSteve French req->PersistentFileId, 454038c8a9a5SSteve French io_parms->tcon->tid, ses->Suid, 454138c8a9a5SSteve French io_parms->offset, io_parms->length); 454238c8a9a5SSteve French 454338c8a9a5SSteve French cifs_small_buf_release(req); 454438c8a9a5SSteve French 454538c8a9a5SSteve French *nbytes = le32_to_cpu(rsp->DataLength); 454638c8a9a5SSteve French if ((*nbytes > CIFS_MAX_MSGSIZE) || 454738c8a9a5SSteve French (*nbytes > io_parms->length)) { 454838c8a9a5SSteve French cifs_dbg(FYI, "bad length %d for count %d\n", 454938c8a9a5SSteve French *nbytes, io_parms->length); 455038c8a9a5SSteve French rc = -EIO; 455138c8a9a5SSteve French *nbytes = 0; 455238c8a9a5SSteve French } 455338c8a9a5SSteve French 455438c8a9a5SSteve French if (*buf) { 455538c8a9a5SSteve French memcpy(*buf, (char *)rsp + rsp->DataOffset, *nbytes); 455638c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp_iov.iov_base); 455738c8a9a5SSteve French } else if (resp_buftype != CIFS_NO_BUFFER) { 455838c8a9a5SSteve French *buf = rsp_iov.iov_base; 455938c8a9a5SSteve French if (resp_buftype == CIFS_SMALL_BUFFER) 456038c8a9a5SSteve French *buf_type = CIFS_SMALL_BUFFER; 456138c8a9a5SSteve French else if (resp_buftype == CIFS_LARGE_BUFFER) 456238c8a9a5SSteve French *buf_type = CIFS_LARGE_BUFFER; 456338c8a9a5SSteve French } 456438c8a9a5SSteve French return rc; 456538c8a9a5SSteve French } 456638c8a9a5SSteve French 456738c8a9a5SSteve French /* 456838c8a9a5SSteve French * Check the mid_state and signature on received buffer (if any), and queue the 456938c8a9a5SSteve French * workqueue completion task. 457038c8a9a5SSteve French */ 457138c8a9a5SSteve French static void 457238c8a9a5SSteve French smb2_writev_callback(struct mid_q_entry *mid) 457338c8a9a5SSteve French { 457438c8a9a5SSteve French struct cifs_writedata *wdata = mid->callback_data; 457538c8a9a5SSteve French struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); 457638c8a9a5SSteve French struct TCP_Server_Info *server = wdata->server; 457738c8a9a5SSteve French unsigned int written; 457838c8a9a5SSteve French struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf; 457938c8a9a5SSteve French struct cifs_credits credits = { .value = 0, .instance = 0 }; 458038c8a9a5SSteve French 458138c8a9a5SSteve French WARN_ONCE(wdata->server != mid->server, 458238c8a9a5SSteve French "wdata server %p != mid server %p", 458338c8a9a5SSteve French wdata->server, mid->server); 458438c8a9a5SSteve French 458538c8a9a5SSteve French switch (mid->mid_state) { 458638c8a9a5SSteve French case MID_RESPONSE_RECEIVED: 458738c8a9a5SSteve French credits.value = le16_to_cpu(rsp->hdr.CreditRequest); 458838c8a9a5SSteve French credits.instance = server->reconnect_instance; 458938c8a9a5SSteve French wdata->result = smb2_check_receive(mid, server, 0); 459038c8a9a5SSteve French if (wdata->result != 0) 459138c8a9a5SSteve French break; 459238c8a9a5SSteve French 459338c8a9a5SSteve French written = le32_to_cpu(rsp->DataLength); 459438c8a9a5SSteve French /* 459538c8a9a5SSteve French * Mask off high 16 bits when bytes written as returned 459638c8a9a5SSteve French * by the server is greater than bytes requested by the 459738c8a9a5SSteve French * client. OS/2 servers are known to set incorrect 459838c8a9a5SSteve French * CountHigh values. 459938c8a9a5SSteve French */ 460038c8a9a5SSteve French if (written > wdata->bytes) 460138c8a9a5SSteve French written &= 0xFFFF; 460238c8a9a5SSteve French 460338c8a9a5SSteve French if (written < wdata->bytes) 460438c8a9a5SSteve French wdata->result = -ENOSPC; 460538c8a9a5SSteve French else 460638c8a9a5SSteve French wdata->bytes = written; 460738c8a9a5SSteve French break; 460838c8a9a5SSteve French case MID_REQUEST_SUBMITTED: 460938c8a9a5SSteve French case MID_RETRY_NEEDED: 461038c8a9a5SSteve French wdata->result = -EAGAIN; 461138c8a9a5SSteve French break; 461238c8a9a5SSteve French case MID_RESPONSE_MALFORMED: 461338c8a9a5SSteve French credits.value = le16_to_cpu(rsp->hdr.CreditRequest); 461438c8a9a5SSteve French credits.instance = server->reconnect_instance; 461538c8a9a5SSteve French fallthrough; 461638c8a9a5SSteve French default: 461738c8a9a5SSteve French wdata->result = -EIO; 461838c8a9a5SSteve French break; 461938c8a9a5SSteve French } 462038c8a9a5SSteve French #ifdef CONFIG_CIFS_SMB_DIRECT 462138c8a9a5SSteve French /* 462238c8a9a5SSteve French * If this wdata has a memory registered, the MR can be freed 462338c8a9a5SSteve French * The number of MRs available is limited, it's important to recover 462438c8a9a5SSteve French * used MR as soon as I/O is finished. Hold MR longer in the later 462538c8a9a5SSteve French * I/O process can possibly result in I/O deadlock due to lack of MR 462638c8a9a5SSteve French * to send request on I/O retry 462738c8a9a5SSteve French */ 462838c8a9a5SSteve French if (wdata->mr) { 462938c8a9a5SSteve French smbd_deregister_mr(wdata->mr); 463038c8a9a5SSteve French wdata->mr = NULL; 463138c8a9a5SSteve French } 463238c8a9a5SSteve French #endif 463338c8a9a5SSteve French if (wdata->result) { 463438c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); 463538c8a9a5SSteve French trace_smb3_write_err(0 /* no xid */, 463638c8a9a5SSteve French wdata->cfile->fid.persistent_fid, 463738c8a9a5SSteve French tcon->tid, tcon->ses->Suid, wdata->offset, 463838c8a9a5SSteve French wdata->bytes, wdata->result); 463938c8a9a5SSteve French if (wdata->result == -ENOSPC) 464038c8a9a5SSteve French pr_warn_once("Out of space writing to %s\n", 464138c8a9a5SSteve French tcon->tree_name); 464238c8a9a5SSteve French } else 464338c8a9a5SSteve French trace_smb3_write_done(0 /* no xid */, 464438c8a9a5SSteve French wdata->cfile->fid.persistent_fid, 464538c8a9a5SSteve French tcon->tid, tcon->ses->Suid, 464638c8a9a5SSteve French wdata->offset, wdata->bytes); 464738c8a9a5SSteve French 464838c8a9a5SSteve French queue_work(cifsiod_wq, &wdata->work); 464938c8a9a5SSteve French release_mid(mid); 465038c8a9a5SSteve French add_credits(server, &credits, 0); 465138c8a9a5SSteve French } 465238c8a9a5SSteve French 465338c8a9a5SSteve French /* smb2_async_writev - send an async write, and set up mid to handle result */ 465438c8a9a5SSteve French int 465538c8a9a5SSteve French smb2_async_writev(struct cifs_writedata *wdata, 465638c8a9a5SSteve French void (*release)(struct kref *kref)) 465738c8a9a5SSteve French { 465838c8a9a5SSteve French int rc = -EACCES, flags = 0; 465938c8a9a5SSteve French struct smb2_write_req *req = NULL; 466038c8a9a5SSteve French struct smb2_hdr *shdr; 466138c8a9a5SSteve French struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); 466238c8a9a5SSteve French struct TCP_Server_Info *server = wdata->server; 466338c8a9a5SSteve French struct kvec iov[1]; 466438c8a9a5SSteve French struct smb_rqst rqst = { }; 466538c8a9a5SSteve French unsigned int total_len; 466638c8a9a5SSteve French struct cifs_io_parms _io_parms; 466738c8a9a5SSteve French struct cifs_io_parms *io_parms = NULL; 46685e90aa21SShyam Prasad N int credit_request; 466938c8a9a5SSteve French 467038c8a9a5SSteve French if (!wdata->server) 467138c8a9a5SSteve French server = wdata->server = cifs_pick_channel(tcon->ses); 467238c8a9a5SSteve French 467338c8a9a5SSteve French /* 467438c8a9a5SSteve French * in future we may get cifs_io_parms passed in from the caller, 467538c8a9a5SSteve French * but for now we construct it here... 467638c8a9a5SSteve French */ 467738c8a9a5SSteve French _io_parms = (struct cifs_io_parms) { 467838c8a9a5SSteve French .tcon = tcon, 467938c8a9a5SSteve French .server = server, 468038c8a9a5SSteve French .offset = wdata->offset, 468138c8a9a5SSteve French .length = wdata->bytes, 468238c8a9a5SSteve French .persistent_fid = wdata->cfile->fid.persistent_fid, 468338c8a9a5SSteve French .volatile_fid = wdata->cfile->fid.volatile_fid, 468438c8a9a5SSteve French .pid = wdata->pid, 468538c8a9a5SSteve French }; 468638c8a9a5SSteve French io_parms = &_io_parms; 468738c8a9a5SSteve French 468838c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_WRITE, tcon, server, 468938c8a9a5SSteve French (void **) &req, &total_len); 469038c8a9a5SSteve French if (rc) 469138c8a9a5SSteve French return rc; 469238c8a9a5SSteve French 469338c8a9a5SSteve French if (smb3_encryption_required(tcon)) 469438c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 469538c8a9a5SSteve French 469638c8a9a5SSteve French shdr = (struct smb2_hdr *)req; 469738c8a9a5SSteve French shdr->Id.SyncId.ProcessId = cpu_to_le32(io_parms->pid); 469838c8a9a5SSteve French 469938c8a9a5SSteve French req->PersistentFileId = io_parms->persistent_fid; 470038c8a9a5SSteve French req->VolatileFileId = io_parms->volatile_fid; 470138c8a9a5SSteve French req->WriteChannelInfoOffset = 0; 470238c8a9a5SSteve French req->WriteChannelInfoLength = 0; 470338c8a9a5SSteve French req->Channel = SMB2_CHANNEL_NONE; 470438c8a9a5SSteve French req->Offset = cpu_to_le64(io_parms->offset); 470538c8a9a5SSteve French req->DataOffset = cpu_to_le16( 470638c8a9a5SSteve French offsetof(struct smb2_write_req, Buffer)); 470738c8a9a5SSteve French req->RemainingBytes = 0; 470838c8a9a5SSteve French 470938c8a9a5SSteve French trace_smb3_write_enter(0 /* xid */, 471038c8a9a5SSteve French io_parms->persistent_fid, 471138c8a9a5SSteve French io_parms->tcon->tid, 471238c8a9a5SSteve French io_parms->tcon->ses->Suid, 471338c8a9a5SSteve French io_parms->offset, 471438c8a9a5SSteve French io_parms->length); 471538c8a9a5SSteve French 471638c8a9a5SSteve French #ifdef CONFIG_CIFS_SMB_DIRECT 471738c8a9a5SSteve French /* 471838c8a9a5SSteve French * If we want to do a server RDMA read, fill in and append 471938c8a9a5SSteve French * smbd_buffer_descriptor_v1 to the end of write request 472038c8a9a5SSteve French */ 472138c8a9a5SSteve French if (smb3_use_rdma_offload(io_parms)) { 472238c8a9a5SSteve French struct smbd_buffer_descriptor_v1 *v1; 472338c8a9a5SSteve French size_t data_size = iov_iter_count(&wdata->iter); 472438c8a9a5SSteve French bool need_invalidate = server->dialect == SMB30_PROT_ID; 472538c8a9a5SSteve French 472638c8a9a5SSteve French wdata->mr = smbd_register_mr(server->smbd_conn, &wdata->iter, 472738c8a9a5SSteve French false, need_invalidate); 472838c8a9a5SSteve French if (!wdata->mr) { 472938c8a9a5SSteve French rc = -EAGAIN; 473038c8a9a5SSteve French goto async_writev_out; 473138c8a9a5SSteve French } 473238c8a9a5SSteve French req->Length = 0; 473338c8a9a5SSteve French req->DataOffset = 0; 473438c8a9a5SSteve French req->RemainingBytes = cpu_to_le32(data_size); 473538c8a9a5SSteve French req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE; 473638c8a9a5SSteve French if (need_invalidate) 473738c8a9a5SSteve French req->Channel = SMB2_CHANNEL_RDMA_V1; 473838c8a9a5SSteve French req->WriteChannelInfoOffset = 473938c8a9a5SSteve French cpu_to_le16(offsetof(struct smb2_write_req, Buffer)); 474038c8a9a5SSteve French req->WriteChannelInfoLength = 474138c8a9a5SSteve French cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1)); 474238c8a9a5SSteve French v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0]; 474338c8a9a5SSteve French v1->offset = cpu_to_le64(wdata->mr->mr->iova); 474438c8a9a5SSteve French v1->token = cpu_to_le32(wdata->mr->mr->rkey); 474538c8a9a5SSteve French v1->length = cpu_to_le32(wdata->mr->mr->length); 474638c8a9a5SSteve French } 474738c8a9a5SSteve French #endif 474838c8a9a5SSteve French iov[0].iov_len = total_len - 1; 474938c8a9a5SSteve French iov[0].iov_base = (char *)req; 475038c8a9a5SSteve French 475138c8a9a5SSteve French rqst.rq_iov = iov; 475238c8a9a5SSteve French rqst.rq_nvec = 1; 475338c8a9a5SSteve French rqst.rq_iter = wdata->iter; 475438c8a9a5SSteve French rqst.rq_iter_size = iov_iter_count(&rqst.rq_iter); 475538c8a9a5SSteve French #ifdef CONFIG_CIFS_SMB_DIRECT 475638c8a9a5SSteve French if (wdata->mr) 475738c8a9a5SSteve French iov[0].iov_len += sizeof(struct smbd_buffer_descriptor_v1); 475838c8a9a5SSteve French #endif 475938c8a9a5SSteve French cifs_dbg(FYI, "async write at %llu %u bytes iter=%zx\n", 476038c8a9a5SSteve French io_parms->offset, io_parms->length, iov_iter_count(&rqst.rq_iter)); 476138c8a9a5SSteve French 476238c8a9a5SSteve French #ifdef CONFIG_CIFS_SMB_DIRECT 476338c8a9a5SSteve French /* For RDMA read, I/O size is in RemainingBytes not in Length */ 476438c8a9a5SSteve French if (!wdata->mr) 476538c8a9a5SSteve French req->Length = cpu_to_le32(io_parms->length); 476638c8a9a5SSteve French #else 476738c8a9a5SSteve French req->Length = cpu_to_le32(io_parms->length); 476838c8a9a5SSteve French #endif 476938c8a9a5SSteve French 477038c8a9a5SSteve French if (wdata->credits.value > 0) { 477138c8a9a5SSteve French shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes, 477238c8a9a5SSteve French SMB2_MAX_BUFFER_SIZE)); 47735e90aa21SShyam Prasad N credit_request = le16_to_cpu(shdr->CreditCharge) + 8; 47745e90aa21SShyam Prasad N if (server->credits >= server->max_credits) 47755e90aa21SShyam Prasad N shdr->CreditRequest = cpu_to_le16(0); 47765e90aa21SShyam Prasad N else 47775e90aa21SShyam Prasad N shdr->CreditRequest = cpu_to_le16( 47785e90aa21SShyam Prasad N min_t(int, server->max_credits - 47795e90aa21SShyam Prasad N server->credits, credit_request)); 478038c8a9a5SSteve French 478138c8a9a5SSteve French rc = adjust_credits(server, &wdata->credits, io_parms->length); 478238c8a9a5SSteve French if (rc) 478338c8a9a5SSteve French goto async_writev_out; 478438c8a9a5SSteve French 478538c8a9a5SSteve French flags |= CIFS_HAS_CREDITS; 478638c8a9a5SSteve French } 478738c8a9a5SSteve French 478838c8a9a5SSteve French kref_get(&wdata->refcount); 478938c8a9a5SSteve French rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL, 479038c8a9a5SSteve French wdata, flags, &wdata->credits); 479138c8a9a5SSteve French 479238c8a9a5SSteve French if (rc) { 479338c8a9a5SSteve French trace_smb3_write_err(0 /* no xid */, 479438c8a9a5SSteve French io_parms->persistent_fid, 479538c8a9a5SSteve French io_parms->tcon->tid, 479638c8a9a5SSteve French io_parms->tcon->ses->Suid, 479738c8a9a5SSteve French io_parms->offset, 479838c8a9a5SSteve French io_parms->length, 479938c8a9a5SSteve French rc); 480038c8a9a5SSteve French kref_put(&wdata->refcount, release); 480138c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); 480238c8a9a5SSteve French } 480338c8a9a5SSteve French 480438c8a9a5SSteve French async_writev_out: 480538c8a9a5SSteve French cifs_small_buf_release(req); 480638c8a9a5SSteve French return rc; 480738c8a9a5SSteve French } 480838c8a9a5SSteve French 480938c8a9a5SSteve French /* 481038c8a9a5SSteve French * SMB2_write function gets iov pointer to kvec array with n_vec as a length. 481138c8a9a5SSteve French * The length field from io_parms must be at least 1 and indicates a number of 481238c8a9a5SSteve French * elements with data to write that begins with position 1 in iov array. All 481338c8a9a5SSteve French * data length is specified by count. 481438c8a9a5SSteve French */ 481538c8a9a5SSteve French int 481638c8a9a5SSteve French SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms, 481738c8a9a5SSteve French unsigned int *nbytes, struct kvec *iov, int n_vec) 481838c8a9a5SSteve French { 481938c8a9a5SSteve French struct smb_rqst rqst; 482038c8a9a5SSteve French int rc = 0; 482138c8a9a5SSteve French struct smb2_write_req *req = NULL; 482238c8a9a5SSteve French struct smb2_write_rsp *rsp = NULL; 482338c8a9a5SSteve French int resp_buftype; 482438c8a9a5SSteve French struct kvec rsp_iov; 482538c8a9a5SSteve French int flags = 0; 482638c8a9a5SSteve French unsigned int total_len; 482738c8a9a5SSteve French struct TCP_Server_Info *server; 482838c8a9a5SSteve French 482938c8a9a5SSteve French *nbytes = 0; 483038c8a9a5SSteve French 483138c8a9a5SSteve French if (n_vec < 1) 483238c8a9a5SSteve French return rc; 483338c8a9a5SSteve French 483438c8a9a5SSteve French if (!io_parms->server) 483538c8a9a5SSteve French io_parms->server = cifs_pick_channel(io_parms->tcon->ses); 483638c8a9a5SSteve French server = io_parms->server; 483738c8a9a5SSteve French if (server == NULL) 483838c8a9a5SSteve French return -ECONNABORTED; 483938c8a9a5SSteve French 484038c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_WRITE, io_parms->tcon, server, 484138c8a9a5SSteve French (void **) &req, &total_len); 484238c8a9a5SSteve French if (rc) 484338c8a9a5SSteve French return rc; 484438c8a9a5SSteve French 484538c8a9a5SSteve French if (smb3_encryption_required(io_parms->tcon)) 484638c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 484738c8a9a5SSteve French 484838c8a9a5SSteve French req->hdr.Id.SyncId.ProcessId = cpu_to_le32(io_parms->pid); 484938c8a9a5SSteve French 485038c8a9a5SSteve French req->PersistentFileId = io_parms->persistent_fid; 485138c8a9a5SSteve French req->VolatileFileId = io_parms->volatile_fid; 485238c8a9a5SSteve French req->WriteChannelInfoOffset = 0; 485338c8a9a5SSteve French req->WriteChannelInfoLength = 0; 485438c8a9a5SSteve French req->Channel = 0; 485538c8a9a5SSteve French req->Length = cpu_to_le32(io_parms->length); 485638c8a9a5SSteve French req->Offset = cpu_to_le64(io_parms->offset); 485738c8a9a5SSteve French req->DataOffset = cpu_to_le16( 485838c8a9a5SSteve French offsetof(struct smb2_write_req, Buffer)); 485938c8a9a5SSteve French req->RemainingBytes = 0; 486038c8a9a5SSteve French 486138c8a9a5SSteve French trace_smb3_write_enter(xid, io_parms->persistent_fid, 486238c8a9a5SSteve French io_parms->tcon->tid, io_parms->tcon->ses->Suid, 486338c8a9a5SSteve French io_parms->offset, io_parms->length); 486438c8a9a5SSteve French 486538c8a9a5SSteve French iov[0].iov_base = (char *)req; 486638c8a9a5SSteve French /* 1 for Buffer */ 486738c8a9a5SSteve French iov[0].iov_len = total_len - 1; 486838c8a9a5SSteve French 486938c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 487038c8a9a5SSteve French rqst.rq_iov = iov; 487138c8a9a5SSteve French rqst.rq_nvec = n_vec + 1; 487238c8a9a5SSteve French 487338c8a9a5SSteve French rc = cifs_send_recv(xid, io_parms->tcon->ses, server, 487438c8a9a5SSteve French &rqst, 487538c8a9a5SSteve French &resp_buftype, flags, &rsp_iov); 487638c8a9a5SSteve French rsp = (struct smb2_write_rsp *)rsp_iov.iov_base; 487738c8a9a5SSteve French 487838c8a9a5SSteve French if (rc) { 487938c8a9a5SSteve French trace_smb3_write_err(xid, 488038c8a9a5SSteve French req->PersistentFileId, 488138c8a9a5SSteve French io_parms->tcon->tid, 488238c8a9a5SSteve French io_parms->tcon->ses->Suid, 488338c8a9a5SSteve French io_parms->offset, io_parms->length, rc); 488438c8a9a5SSteve French cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE); 488538c8a9a5SSteve French cifs_dbg(VFS, "Send error in write = %d\n", rc); 488638c8a9a5SSteve French } else { 488738c8a9a5SSteve French *nbytes = le32_to_cpu(rsp->DataLength); 488838c8a9a5SSteve French trace_smb3_write_done(xid, 488938c8a9a5SSteve French req->PersistentFileId, 489038c8a9a5SSteve French io_parms->tcon->tid, 489138c8a9a5SSteve French io_parms->tcon->ses->Suid, 489238c8a9a5SSteve French io_parms->offset, *nbytes); 489338c8a9a5SSteve French } 489438c8a9a5SSteve French 489538c8a9a5SSteve French cifs_small_buf_release(req); 489638c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp); 489738c8a9a5SSteve French return rc; 489838c8a9a5SSteve French } 489938c8a9a5SSteve French 490038c8a9a5SSteve French int posix_info_sid_size(const void *beg, const void *end) 490138c8a9a5SSteve French { 490238c8a9a5SSteve French size_t subauth; 490338c8a9a5SSteve French int total; 490438c8a9a5SSteve French 490538c8a9a5SSteve French if (beg + 1 > end) 490638c8a9a5SSteve French return -1; 490738c8a9a5SSteve French 490838c8a9a5SSteve French subauth = *(u8 *)(beg+1); 490938c8a9a5SSteve French if (subauth < 1 || subauth > 15) 491038c8a9a5SSteve French return -1; 491138c8a9a5SSteve French 491238c8a9a5SSteve French total = 1 + 1 + 6 + 4*subauth; 491338c8a9a5SSteve French if (beg + total > end) 491438c8a9a5SSteve French return -1; 491538c8a9a5SSteve French 491638c8a9a5SSteve French return total; 491738c8a9a5SSteve French } 491838c8a9a5SSteve French 491938c8a9a5SSteve French int posix_info_parse(const void *beg, const void *end, 492038c8a9a5SSteve French struct smb2_posix_info_parsed *out) 492138c8a9a5SSteve French 492238c8a9a5SSteve French { 492338c8a9a5SSteve French int total_len = 0; 492438c8a9a5SSteve French int owner_len, group_len; 492538c8a9a5SSteve French int name_len; 492638c8a9a5SSteve French const void *owner_sid; 492738c8a9a5SSteve French const void *group_sid; 492838c8a9a5SSteve French const void *name; 492938c8a9a5SSteve French 493038c8a9a5SSteve French /* if no end bound given, assume payload to be correct */ 493138c8a9a5SSteve French if (!end) { 493238c8a9a5SSteve French const struct smb2_posix_info *p = beg; 493338c8a9a5SSteve French 493438c8a9a5SSteve French end = beg + le32_to_cpu(p->NextEntryOffset); 493538c8a9a5SSteve French /* last element will have a 0 offset, pick a sensible bound */ 493638c8a9a5SSteve French if (end == beg) 493738c8a9a5SSteve French end += 0xFFFF; 493838c8a9a5SSteve French } 493938c8a9a5SSteve French 494038c8a9a5SSteve French /* check base buf */ 494138c8a9a5SSteve French if (beg + sizeof(struct smb2_posix_info) > end) 494238c8a9a5SSteve French return -1; 494338c8a9a5SSteve French total_len = sizeof(struct smb2_posix_info); 494438c8a9a5SSteve French 494538c8a9a5SSteve French /* check owner sid */ 494638c8a9a5SSteve French owner_sid = beg + total_len; 494738c8a9a5SSteve French owner_len = posix_info_sid_size(owner_sid, end); 494838c8a9a5SSteve French if (owner_len < 0) 494938c8a9a5SSteve French return -1; 495038c8a9a5SSteve French total_len += owner_len; 495138c8a9a5SSteve French 495238c8a9a5SSteve French /* check group sid */ 495338c8a9a5SSteve French group_sid = beg + total_len; 495438c8a9a5SSteve French group_len = posix_info_sid_size(group_sid, end); 495538c8a9a5SSteve French if (group_len < 0) 495638c8a9a5SSteve French return -1; 495738c8a9a5SSteve French total_len += group_len; 495838c8a9a5SSteve French 495938c8a9a5SSteve French /* check name len */ 496038c8a9a5SSteve French if (beg + total_len + 4 > end) 496138c8a9a5SSteve French return -1; 496238c8a9a5SSteve French name_len = le32_to_cpu(*(__le32 *)(beg + total_len)); 496338c8a9a5SSteve French if (name_len < 1 || name_len > 0xFFFF) 496438c8a9a5SSteve French return -1; 496538c8a9a5SSteve French total_len += 4; 496638c8a9a5SSteve French 496738c8a9a5SSteve French /* check name */ 496838c8a9a5SSteve French name = beg + total_len; 496938c8a9a5SSteve French if (name + name_len > end) 497038c8a9a5SSteve French return -1; 497138c8a9a5SSteve French total_len += name_len; 497238c8a9a5SSteve French 497338c8a9a5SSteve French if (out) { 497438c8a9a5SSteve French out->base = beg; 497538c8a9a5SSteve French out->size = total_len; 497638c8a9a5SSteve French out->name_len = name_len; 497738c8a9a5SSteve French out->name = name; 497838c8a9a5SSteve French memcpy(&out->owner, owner_sid, owner_len); 497938c8a9a5SSteve French memcpy(&out->group, group_sid, group_len); 498038c8a9a5SSteve French } 498138c8a9a5SSteve French return total_len; 498238c8a9a5SSteve French } 498338c8a9a5SSteve French 498438c8a9a5SSteve French static int posix_info_extra_size(const void *beg, const void *end) 498538c8a9a5SSteve French { 498638c8a9a5SSteve French int len = posix_info_parse(beg, end, NULL); 498738c8a9a5SSteve French 498838c8a9a5SSteve French if (len < 0) 498938c8a9a5SSteve French return -1; 499038c8a9a5SSteve French return len - sizeof(struct smb2_posix_info); 499138c8a9a5SSteve French } 499238c8a9a5SSteve French 499338c8a9a5SSteve French static unsigned int 499438c8a9a5SSteve French num_entries(int infotype, char *bufstart, char *end_of_buf, char **lastentry, 499538c8a9a5SSteve French size_t size) 499638c8a9a5SSteve French { 499738c8a9a5SSteve French int len; 499838c8a9a5SSteve French unsigned int entrycount = 0; 499938c8a9a5SSteve French unsigned int next_offset = 0; 500038c8a9a5SSteve French char *entryptr; 500138c8a9a5SSteve French FILE_DIRECTORY_INFO *dir_info; 500238c8a9a5SSteve French 500338c8a9a5SSteve French if (bufstart == NULL) 500438c8a9a5SSteve French return 0; 500538c8a9a5SSteve French 500638c8a9a5SSteve French entryptr = bufstart; 500738c8a9a5SSteve French 500838c8a9a5SSteve French while (1) { 500938c8a9a5SSteve French if (entryptr + next_offset < entryptr || 501038c8a9a5SSteve French entryptr + next_offset > end_of_buf || 501138c8a9a5SSteve French entryptr + next_offset + size > end_of_buf) { 501238c8a9a5SSteve French cifs_dbg(VFS, "malformed search entry would overflow\n"); 501338c8a9a5SSteve French break; 501438c8a9a5SSteve French } 501538c8a9a5SSteve French 501638c8a9a5SSteve French entryptr = entryptr + next_offset; 501738c8a9a5SSteve French dir_info = (FILE_DIRECTORY_INFO *)entryptr; 501838c8a9a5SSteve French 501938c8a9a5SSteve French if (infotype == SMB_FIND_FILE_POSIX_INFO) 502038c8a9a5SSteve French len = posix_info_extra_size(entryptr, end_of_buf); 502138c8a9a5SSteve French else 502238c8a9a5SSteve French len = le32_to_cpu(dir_info->FileNameLength); 502338c8a9a5SSteve French 502438c8a9a5SSteve French if (len < 0 || 502538c8a9a5SSteve French entryptr + len < entryptr || 502638c8a9a5SSteve French entryptr + len > end_of_buf || 502738c8a9a5SSteve French entryptr + len + size > end_of_buf) { 502838c8a9a5SSteve French cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n", 502938c8a9a5SSteve French end_of_buf); 503038c8a9a5SSteve French break; 503138c8a9a5SSteve French } 503238c8a9a5SSteve French 503338c8a9a5SSteve French *lastentry = entryptr; 503438c8a9a5SSteve French entrycount++; 503538c8a9a5SSteve French 503638c8a9a5SSteve French next_offset = le32_to_cpu(dir_info->NextEntryOffset); 503738c8a9a5SSteve French if (!next_offset) 503838c8a9a5SSteve French break; 503938c8a9a5SSteve French } 504038c8a9a5SSteve French 504138c8a9a5SSteve French return entrycount; 504238c8a9a5SSteve French } 504338c8a9a5SSteve French 504438c8a9a5SSteve French /* 504538c8a9a5SSteve French * Readdir/FindFirst 504638c8a9a5SSteve French */ 504738c8a9a5SSteve French int SMB2_query_directory_init(const unsigned int xid, 504838c8a9a5SSteve French struct cifs_tcon *tcon, 504938c8a9a5SSteve French struct TCP_Server_Info *server, 505038c8a9a5SSteve French struct smb_rqst *rqst, 505138c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, 505238c8a9a5SSteve French int index, int info_level) 505338c8a9a5SSteve French { 505438c8a9a5SSteve French struct smb2_query_directory_req *req; 505538c8a9a5SSteve French unsigned char *bufptr; 505638c8a9a5SSteve French __le16 asteriks = cpu_to_le16('*'); 505738c8a9a5SSteve French unsigned int output_size = CIFSMaxBufSize - 505838c8a9a5SSteve French MAX_SMB2_CREATE_RESPONSE_SIZE - 505938c8a9a5SSteve French MAX_SMB2_CLOSE_RESPONSE_SIZE; 506038c8a9a5SSteve French unsigned int total_len; 506138c8a9a5SSteve French struct kvec *iov = rqst->rq_iov; 506238c8a9a5SSteve French int len, rc; 506338c8a9a5SSteve French 506438c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_QUERY_DIRECTORY, tcon, server, 506538c8a9a5SSteve French (void **) &req, &total_len); 506638c8a9a5SSteve French if (rc) 506738c8a9a5SSteve French return rc; 506838c8a9a5SSteve French 506938c8a9a5SSteve French switch (info_level) { 507038c8a9a5SSteve French case SMB_FIND_FILE_DIRECTORY_INFO: 507138c8a9a5SSteve French req->FileInformationClass = FILE_DIRECTORY_INFORMATION; 507238c8a9a5SSteve French break; 507338c8a9a5SSteve French case SMB_FIND_FILE_ID_FULL_DIR_INFO: 507438c8a9a5SSteve French req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION; 507538c8a9a5SSteve French break; 507638c8a9a5SSteve French case SMB_FIND_FILE_POSIX_INFO: 507738c8a9a5SSteve French req->FileInformationClass = SMB_FIND_FILE_POSIX_INFO; 507838c8a9a5SSteve French break; 507938c8a9a5SSteve French default: 508038c8a9a5SSteve French cifs_tcon_dbg(VFS, "info level %u isn't supported\n", 508138c8a9a5SSteve French info_level); 508238c8a9a5SSteve French return -EINVAL; 508338c8a9a5SSteve French } 508438c8a9a5SSteve French 508538c8a9a5SSteve French req->FileIndex = cpu_to_le32(index); 508638c8a9a5SSteve French req->PersistentFileId = persistent_fid; 508738c8a9a5SSteve French req->VolatileFileId = volatile_fid; 508838c8a9a5SSteve French 508938c8a9a5SSteve French len = 0x2; 509038c8a9a5SSteve French bufptr = req->Buffer; 509138c8a9a5SSteve French memcpy(bufptr, &asteriks, len); 509238c8a9a5SSteve French 509338c8a9a5SSteve French req->FileNameOffset = 509438c8a9a5SSteve French cpu_to_le16(sizeof(struct smb2_query_directory_req)); 509538c8a9a5SSteve French req->FileNameLength = cpu_to_le16(len); 509638c8a9a5SSteve French /* 509738c8a9a5SSteve French * BB could be 30 bytes or so longer if we used SMB2 specific 509838c8a9a5SSteve French * buffer lengths, but this is safe and close enough. 509938c8a9a5SSteve French */ 510038c8a9a5SSteve French output_size = min_t(unsigned int, output_size, server->maxBuf); 510138c8a9a5SSteve French output_size = min_t(unsigned int, output_size, 2 << 15); 510238c8a9a5SSteve French req->OutputBufferLength = cpu_to_le32(output_size); 510338c8a9a5SSteve French 510438c8a9a5SSteve French iov[0].iov_base = (char *)req; 510538c8a9a5SSteve French /* 1 for Buffer */ 510638c8a9a5SSteve French iov[0].iov_len = total_len - 1; 510738c8a9a5SSteve French 510838c8a9a5SSteve French iov[1].iov_base = (char *)(req->Buffer); 510938c8a9a5SSteve French iov[1].iov_len = len; 511038c8a9a5SSteve French 511138c8a9a5SSteve French trace_smb3_query_dir_enter(xid, persistent_fid, tcon->tid, 511238c8a9a5SSteve French tcon->ses->Suid, index, output_size); 511338c8a9a5SSteve French 511438c8a9a5SSteve French return 0; 511538c8a9a5SSteve French } 511638c8a9a5SSteve French 511738c8a9a5SSteve French void SMB2_query_directory_free(struct smb_rqst *rqst) 511838c8a9a5SSteve French { 511938c8a9a5SSteve French if (rqst && rqst->rq_iov) { 512038c8a9a5SSteve French cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */ 512138c8a9a5SSteve French } 512238c8a9a5SSteve French } 512338c8a9a5SSteve French 512438c8a9a5SSteve French int 512538c8a9a5SSteve French smb2_parse_query_directory(struct cifs_tcon *tcon, 512638c8a9a5SSteve French struct kvec *rsp_iov, 512738c8a9a5SSteve French int resp_buftype, 512838c8a9a5SSteve French struct cifs_search_info *srch_inf) 512938c8a9a5SSteve French { 513038c8a9a5SSteve French struct smb2_query_directory_rsp *rsp; 513138c8a9a5SSteve French size_t info_buf_size; 513238c8a9a5SSteve French char *end_of_smb; 513338c8a9a5SSteve French int rc; 513438c8a9a5SSteve French 513538c8a9a5SSteve French rsp = (struct smb2_query_directory_rsp *)rsp_iov->iov_base; 513638c8a9a5SSteve French 513738c8a9a5SSteve French switch (srch_inf->info_level) { 513838c8a9a5SSteve French case SMB_FIND_FILE_DIRECTORY_INFO: 513938c8a9a5SSteve French info_buf_size = sizeof(FILE_DIRECTORY_INFO); 514038c8a9a5SSteve French break; 514138c8a9a5SSteve French case SMB_FIND_FILE_ID_FULL_DIR_INFO: 514238c8a9a5SSteve French info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO); 514338c8a9a5SSteve French break; 514438c8a9a5SSteve French case SMB_FIND_FILE_POSIX_INFO: 514538c8a9a5SSteve French /* note that posix payload are variable size */ 514638c8a9a5SSteve French info_buf_size = sizeof(struct smb2_posix_info); 514738c8a9a5SSteve French break; 514838c8a9a5SSteve French default: 514938c8a9a5SSteve French cifs_tcon_dbg(VFS, "info level %u isn't supported\n", 515038c8a9a5SSteve French srch_inf->info_level); 515138c8a9a5SSteve French return -EINVAL; 515238c8a9a5SSteve French } 515338c8a9a5SSteve French 515438c8a9a5SSteve French rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 515538c8a9a5SSteve French le32_to_cpu(rsp->OutputBufferLength), rsp_iov, 515638c8a9a5SSteve French info_buf_size); 515738c8a9a5SSteve French if (rc) { 515838c8a9a5SSteve French cifs_tcon_dbg(VFS, "bad info payload"); 515938c8a9a5SSteve French return rc; 516038c8a9a5SSteve French } 516138c8a9a5SSteve French 516238c8a9a5SSteve French srch_inf->unicode = true; 516338c8a9a5SSteve French 516438c8a9a5SSteve French if (srch_inf->ntwrk_buf_start) { 516538c8a9a5SSteve French if (srch_inf->smallBuf) 516638c8a9a5SSteve French cifs_small_buf_release(srch_inf->ntwrk_buf_start); 516738c8a9a5SSteve French else 516838c8a9a5SSteve French cifs_buf_release(srch_inf->ntwrk_buf_start); 516938c8a9a5SSteve French } 517038c8a9a5SSteve French srch_inf->ntwrk_buf_start = (char *)rsp; 517138c8a9a5SSteve French srch_inf->srch_entries_start = srch_inf->last_entry = 517238c8a9a5SSteve French (char *)rsp + le16_to_cpu(rsp->OutputBufferOffset); 517338c8a9a5SSteve French end_of_smb = rsp_iov->iov_len + (char *)rsp; 517438c8a9a5SSteve French 517538c8a9a5SSteve French srch_inf->entries_in_buffer = num_entries( 517638c8a9a5SSteve French srch_inf->info_level, 517738c8a9a5SSteve French srch_inf->srch_entries_start, 517838c8a9a5SSteve French end_of_smb, 517938c8a9a5SSteve French &srch_inf->last_entry, 518038c8a9a5SSteve French info_buf_size); 518138c8a9a5SSteve French 518238c8a9a5SSteve French srch_inf->index_of_last_entry += srch_inf->entries_in_buffer; 518338c8a9a5SSteve French cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n", 518438c8a9a5SSteve French srch_inf->entries_in_buffer, srch_inf->index_of_last_entry, 518538c8a9a5SSteve French srch_inf->srch_entries_start, srch_inf->last_entry); 518638c8a9a5SSteve French if (resp_buftype == CIFS_LARGE_BUFFER) 518738c8a9a5SSteve French srch_inf->smallBuf = false; 518838c8a9a5SSteve French else if (resp_buftype == CIFS_SMALL_BUFFER) 518938c8a9a5SSteve French srch_inf->smallBuf = true; 519038c8a9a5SSteve French else 519138c8a9a5SSteve French cifs_tcon_dbg(VFS, "Invalid search buffer type\n"); 519238c8a9a5SSteve French 519338c8a9a5SSteve French return 0; 519438c8a9a5SSteve French } 519538c8a9a5SSteve French 519638c8a9a5SSteve French int 519738c8a9a5SSteve French SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon, 519838c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, int index, 519938c8a9a5SSteve French struct cifs_search_info *srch_inf) 520038c8a9a5SSteve French { 520138c8a9a5SSteve French struct smb_rqst rqst; 520238c8a9a5SSteve French struct kvec iov[SMB2_QUERY_DIRECTORY_IOV_SIZE]; 520338c8a9a5SSteve French struct smb2_query_directory_rsp *rsp = NULL; 520438c8a9a5SSteve French int resp_buftype = CIFS_NO_BUFFER; 520538c8a9a5SSteve French struct kvec rsp_iov; 520638c8a9a5SSteve French int rc = 0; 520738c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 520838c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 520938c8a9a5SSteve French int flags = 0; 521038c8a9a5SSteve French 521138c8a9a5SSteve French if (!ses || !(ses->server)) 521238c8a9a5SSteve French return -EIO; 521338c8a9a5SSteve French 521438c8a9a5SSteve French if (smb3_encryption_required(tcon)) 521538c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 521638c8a9a5SSteve French 521738c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 521838c8a9a5SSteve French memset(&iov, 0, sizeof(iov)); 521938c8a9a5SSteve French rqst.rq_iov = iov; 522038c8a9a5SSteve French rqst.rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE; 522138c8a9a5SSteve French 522238c8a9a5SSteve French rc = SMB2_query_directory_init(xid, tcon, server, 522338c8a9a5SSteve French &rqst, persistent_fid, 522438c8a9a5SSteve French volatile_fid, index, 522538c8a9a5SSteve French srch_inf->info_level); 522638c8a9a5SSteve French if (rc) 522738c8a9a5SSteve French goto qdir_exit; 522838c8a9a5SSteve French 522938c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 523038c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 523138c8a9a5SSteve French rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base; 523238c8a9a5SSteve French 523338c8a9a5SSteve French if (rc) { 523438c8a9a5SSteve French if (rc == -ENODATA && 523538c8a9a5SSteve French rsp->hdr.Status == STATUS_NO_MORE_FILES) { 523638c8a9a5SSteve French trace_smb3_query_dir_done(xid, persistent_fid, 523738c8a9a5SSteve French tcon->tid, tcon->ses->Suid, index, 0); 523838c8a9a5SSteve French srch_inf->endOfSearch = true; 523938c8a9a5SSteve French rc = 0; 524038c8a9a5SSteve French } else { 524138c8a9a5SSteve French trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid, 524238c8a9a5SSteve French tcon->ses->Suid, index, 0, rc); 524338c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE); 524438c8a9a5SSteve French } 524538c8a9a5SSteve French goto qdir_exit; 524638c8a9a5SSteve French } 524738c8a9a5SSteve French 524838c8a9a5SSteve French rc = smb2_parse_query_directory(tcon, &rsp_iov, resp_buftype, 524938c8a9a5SSteve French srch_inf); 525038c8a9a5SSteve French if (rc) { 525138c8a9a5SSteve French trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid, 525238c8a9a5SSteve French tcon->ses->Suid, index, 0, rc); 525338c8a9a5SSteve French goto qdir_exit; 525438c8a9a5SSteve French } 525538c8a9a5SSteve French resp_buftype = CIFS_NO_BUFFER; 525638c8a9a5SSteve French 525738c8a9a5SSteve French trace_smb3_query_dir_done(xid, persistent_fid, tcon->tid, 525838c8a9a5SSteve French tcon->ses->Suid, index, srch_inf->entries_in_buffer); 525938c8a9a5SSteve French 526038c8a9a5SSteve French qdir_exit: 526138c8a9a5SSteve French SMB2_query_directory_free(&rqst); 526238c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp); 526338c8a9a5SSteve French return rc; 526438c8a9a5SSteve French } 526538c8a9a5SSteve French 526638c8a9a5SSteve French int 526738c8a9a5SSteve French SMB2_set_info_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server, 526838c8a9a5SSteve French struct smb_rqst *rqst, 526938c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, u32 pid, 527038c8a9a5SSteve French u8 info_class, u8 info_type, u32 additional_info, 527138c8a9a5SSteve French void **data, unsigned int *size) 527238c8a9a5SSteve French { 527338c8a9a5SSteve French struct smb2_set_info_req *req; 527438c8a9a5SSteve French struct kvec *iov = rqst->rq_iov; 527538c8a9a5SSteve French unsigned int i, total_len; 527638c8a9a5SSteve French int rc; 527738c8a9a5SSteve French 527838c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_SET_INFO, tcon, server, 527938c8a9a5SSteve French (void **) &req, &total_len); 528038c8a9a5SSteve French if (rc) 528138c8a9a5SSteve French return rc; 528238c8a9a5SSteve French 528338c8a9a5SSteve French req->hdr.Id.SyncId.ProcessId = cpu_to_le32(pid); 528438c8a9a5SSteve French req->InfoType = info_type; 528538c8a9a5SSteve French req->FileInfoClass = info_class; 528638c8a9a5SSteve French req->PersistentFileId = persistent_fid; 528738c8a9a5SSteve French req->VolatileFileId = volatile_fid; 528838c8a9a5SSteve French req->AdditionalInformation = cpu_to_le32(additional_info); 528938c8a9a5SSteve French 529038c8a9a5SSteve French req->BufferOffset = cpu_to_le16(sizeof(struct smb2_set_info_req)); 529138c8a9a5SSteve French req->BufferLength = cpu_to_le32(*size); 529238c8a9a5SSteve French 529338c8a9a5SSteve French memcpy(req->Buffer, *data, *size); 529438c8a9a5SSteve French total_len += *size; 529538c8a9a5SSteve French 529638c8a9a5SSteve French iov[0].iov_base = (char *)req; 529738c8a9a5SSteve French /* 1 for Buffer */ 529838c8a9a5SSteve French iov[0].iov_len = total_len - 1; 529938c8a9a5SSteve French 530038c8a9a5SSteve French for (i = 1; i < rqst->rq_nvec; i++) { 530138c8a9a5SSteve French le32_add_cpu(&req->BufferLength, size[i]); 530238c8a9a5SSteve French iov[i].iov_base = (char *)data[i]; 530338c8a9a5SSteve French iov[i].iov_len = size[i]; 530438c8a9a5SSteve French } 530538c8a9a5SSteve French 530638c8a9a5SSteve French return 0; 530738c8a9a5SSteve French } 530838c8a9a5SSteve French 530938c8a9a5SSteve French void 531038c8a9a5SSteve French SMB2_set_info_free(struct smb_rqst *rqst) 531138c8a9a5SSteve French { 531238c8a9a5SSteve French if (rqst && rqst->rq_iov) 531338c8a9a5SSteve French cifs_buf_release(rqst->rq_iov[0].iov_base); /* request */ 531438c8a9a5SSteve French } 531538c8a9a5SSteve French 531638c8a9a5SSteve French static int 531738c8a9a5SSteve French send_set_info(const unsigned int xid, struct cifs_tcon *tcon, 531838c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class, 531938c8a9a5SSteve French u8 info_type, u32 additional_info, unsigned int num, 532038c8a9a5SSteve French void **data, unsigned int *size) 532138c8a9a5SSteve French { 532238c8a9a5SSteve French struct smb_rqst rqst; 532338c8a9a5SSteve French struct smb2_set_info_rsp *rsp = NULL; 532438c8a9a5SSteve French struct kvec *iov; 532538c8a9a5SSteve French struct kvec rsp_iov; 532638c8a9a5SSteve French int rc = 0; 532738c8a9a5SSteve French int resp_buftype; 532838c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 532938c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 533038c8a9a5SSteve French int flags = 0; 533138c8a9a5SSteve French 533238c8a9a5SSteve French if (!ses || !server) 533338c8a9a5SSteve French return -EIO; 533438c8a9a5SSteve French 533538c8a9a5SSteve French if (!num) 533638c8a9a5SSteve French return -EINVAL; 533738c8a9a5SSteve French 533838c8a9a5SSteve French if (smb3_encryption_required(tcon)) 533938c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 534038c8a9a5SSteve French 534138c8a9a5SSteve French iov = kmalloc_array(num, sizeof(struct kvec), GFP_KERNEL); 534238c8a9a5SSteve French if (!iov) 534338c8a9a5SSteve French return -ENOMEM; 534438c8a9a5SSteve French 534538c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 534638c8a9a5SSteve French rqst.rq_iov = iov; 534738c8a9a5SSteve French rqst.rq_nvec = num; 534838c8a9a5SSteve French 534938c8a9a5SSteve French rc = SMB2_set_info_init(tcon, server, 535038c8a9a5SSteve French &rqst, persistent_fid, volatile_fid, pid, 535138c8a9a5SSteve French info_class, info_type, additional_info, 535238c8a9a5SSteve French data, size); 535338c8a9a5SSteve French if (rc) { 535438c8a9a5SSteve French kfree(iov); 535538c8a9a5SSteve French return rc; 535638c8a9a5SSteve French } 535738c8a9a5SSteve French 535838c8a9a5SSteve French 535938c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 536038c8a9a5SSteve French &rqst, &resp_buftype, flags, 536138c8a9a5SSteve French &rsp_iov); 536238c8a9a5SSteve French SMB2_set_info_free(&rqst); 536338c8a9a5SSteve French rsp = (struct smb2_set_info_rsp *)rsp_iov.iov_base; 536438c8a9a5SSteve French 536538c8a9a5SSteve French if (rc != 0) { 536638c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE); 536738c8a9a5SSteve French trace_smb3_set_info_err(xid, persistent_fid, tcon->tid, 536838c8a9a5SSteve French ses->Suid, info_class, (__u32)info_type, rc); 536938c8a9a5SSteve French } 537038c8a9a5SSteve French 537138c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp); 537238c8a9a5SSteve French kfree(iov); 537338c8a9a5SSteve French return rc; 537438c8a9a5SSteve French } 537538c8a9a5SSteve French 537638c8a9a5SSteve French int 537738c8a9a5SSteve French SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, 537838c8a9a5SSteve French u64 volatile_fid, u32 pid, __le64 *eof) 537938c8a9a5SSteve French { 538038c8a9a5SSteve French struct smb2_file_eof_info info; 538138c8a9a5SSteve French void *data; 538238c8a9a5SSteve French unsigned int size; 538338c8a9a5SSteve French 538438c8a9a5SSteve French info.EndOfFile = *eof; 538538c8a9a5SSteve French 538638c8a9a5SSteve French data = &info; 538738c8a9a5SSteve French size = sizeof(struct smb2_file_eof_info); 538838c8a9a5SSteve French 538938c8a9a5SSteve French trace_smb3_set_eof(xid, persistent_fid, tcon->tid, tcon->ses->Suid, le64_to_cpu(*eof)); 539038c8a9a5SSteve French 539138c8a9a5SSteve French return send_set_info(xid, tcon, persistent_fid, volatile_fid, 539238c8a9a5SSteve French pid, FILE_END_OF_FILE_INFORMATION, SMB2_O_INFO_FILE, 539338c8a9a5SSteve French 0, 1, &data, &size); 539438c8a9a5SSteve French } 539538c8a9a5SSteve French 539638c8a9a5SSteve French int 539738c8a9a5SSteve French SMB2_set_acl(const unsigned int xid, struct cifs_tcon *tcon, 539838c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, 539938c8a9a5SSteve French struct cifs_ntsd *pnntsd, int pacllen, int aclflag) 540038c8a9a5SSteve French { 540138c8a9a5SSteve French return send_set_info(xid, tcon, persistent_fid, volatile_fid, 540238c8a9a5SSteve French current->tgid, 0, SMB2_O_INFO_SECURITY, aclflag, 540338c8a9a5SSteve French 1, (void **)&pnntsd, &pacllen); 540438c8a9a5SSteve French } 540538c8a9a5SSteve French 540638c8a9a5SSteve French int 540738c8a9a5SSteve French SMB2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, 540838c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, 540938c8a9a5SSteve French struct smb2_file_full_ea_info *buf, int len) 541038c8a9a5SSteve French { 541138c8a9a5SSteve French return send_set_info(xid, tcon, persistent_fid, volatile_fid, 541238c8a9a5SSteve French current->tgid, FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE, 541338c8a9a5SSteve French 0, 1, (void **)&buf, &len); 541438c8a9a5SSteve French } 541538c8a9a5SSteve French 541638c8a9a5SSteve French int 541738c8a9a5SSteve French SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon, 541838c8a9a5SSteve French const u64 persistent_fid, const u64 volatile_fid, 541938c8a9a5SSteve French __u8 oplock_level) 542038c8a9a5SSteve French { 542138c8a9a5SSteve French struct smb_rqst rqst; 542238c8a9a5SSteve French int rc; 542338c8a9a5SSteve French struct smb2_oplock_break *req = NULL; 542438c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 542538c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 542638c8a9a5SSteve French int flags = CIFS_OBREAK_OP; 542738c8a9a5SSteve French unsigned int total_len; 542838c8a9a5SSteve French struct kvec iov[1]; 542938c8a9a5SSteve French struct kvec rsp_iov; 543038c8a9a5SSteve French int resp_buf_type; 543138c8a9a5SSteve French 543238c8a9a5SSteve French cifs_dbg(FYI, "SMB2_oplock_break\n"); 543338c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, server, 543438c8a9a5SSteve French (void **) &req, &total_len); 543538c8a9a5SSteve French if (rc) 543638c8a9a5SSteve French return rc; 543738c8a9a5SSteve French 543838c8a9a5SSteve French if (smb3_encryption_required(tcon)) 543938c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 544038c8a9a5SSteve French 544138c8a9a5SSteve French req->VolatileFid = volatile_fid; 544238c8a9a5SSteve French req->PersistentFid = persistent_fid; 544338c8a9a5SSteve French req->OplockLevel = oplock_level; 544438c8a9a5SSteve French req->hdr.CreditRequest = cpu_to_le16(1); 544538c8a9a5SSteve French 544638c8a9a5SSteve French flags |= CIFS_NO_RSP_BUF; 544738c8a9a5SSteve French 544838c8a9a5SSteve French iov[0].iov_base = (char *)req; 544938c8a9a5SSteve French iov[0].iov_len = total_len; 545038c8a9a5SSteve French 545138c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 545238c8a9a5SSteve French rqst.rq_iov = iov; 545338c8a9a5SSteve French rqst.rq_nvec = 1; 545438c8a9a5SSteve French 545538c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 545638c8a9a5SSteve French &rqst, &resp_buf_type, flags, &rsp_iov); 545738c8a9a5SSteve French cifs_small_buf_release(req); 545838c8a9a5SSteve French 545938c8a9a5SSteve French if (rc) { 546038c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); 546138c8a9a5SSteve French cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc); 546238c8a9a5SSteve French } 546338c8a9a5SSteve French 546438c8a9a5SSteve French return rc; 546538c8a9a5SSteve French } 546638c8a9a5SSteve French 546738c8a9a5SSteve French void 546838c8a9a5SSteve French smb2_copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf, 546938c8a9a5SSteve French struct kstatfs *kst) 547038c8a9a5SSteve French { 547138c8a9a5SSteve French kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) * 547238c8a9a5SSteve French le32_to_cpu(pfs_inf->SectorsPerAllocationUnit); 547338c8a9a5SSteve French kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits); 547438c8a9a5SSteve French kst->f_bfree = kst->f_bavail = 547538c8a9a5SSteve French le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits); 547638c8a9a5SSteve French return; 547738c8a9a5SSteve French } 547838c8a9a5SSteve French 547938c8a9a5SSteve French static void 548038c8a9a5SSteve French copy_posix_fs_info_to_kstatfs(FILE_SYSTEM_POSIX_INFO *response_data, 548138c8a9a5SSteve French struct kstatfs *kst) 548238c8a9a5SSteve French { 548338c8a9a5SSteve French kst->f_bsize = le32_to_cpu(response_data->BlockSize); 548438c8a9a5SSteve French kst->f_blocks = le64_to_cpu(response_data->TotalBlocks); 548538c8a9a5SSteve French kst->f_bfree = le64_to_cpu(response_data->BlocksAvail); 548638c8a9a5SSteve French if (response_data->UserBlocksAvail == cpu_to_le64(-1)) 548738c8a9a5SSteve French kst->f_bavail = kst->f_bfree; 548838c8a9a5SSteve French else 548938c8a9a5SSteve French kst->f_bavail = le64_to_cpu(response_data->UserBlocksAvail); 549038c8a9a5SSteve French if (response_data->TotalFileNodes != cpu_to_le64(-1)) 549138c8a9a5SSteve French kst->f_files = le64_to_cpu(response_data->TotalFileNodes); 549238c8a9a5SSteve French if (response_data->FreeFileNodes != cpu_to_le64(-1)) 549338c8a9a5SSteve French kst->f_ffree = le64_to_cpu(response_data->FreeFileNodes); 549438c8a9a5SSteve French 549538c8a9a5SSteve French return; 549638c8a9a5SSteve French } 549738c8a9a5SSteve French 549838c8a9a5SSteve French static int 549938c8a9a5SSteve French build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, 550038c8a9a5SSteve French struct TCP_Server_Info *server, 550138c8a9a5SSteve French int level, int outbuf_len, u64 persistent_fid, 550238c8a9a5SSteve French u64 volatile_fid) 550338c8a9a5SSteve French { 550438c8a9a5SSteve French int rc; 550538c8a9a5SSteve French struct smb2_query_info_req *req; 550638c8a9a5SSteve French unsigned int total_len; 550738c8a9a5SSteve French 550838c8a9a5SSteve French cifs_dbg(FYI, "Query FSInfo level %d\n", level); 550938c8a9a5SSteve French 551038c8a9a5SSteve French if ((tcon->ses == NULL) || server == NULL) 551138c8a9a5SSteve French return -EIO; 551238c8a9a5SSteve French 551338c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, server, 551438c8a9a5SSteve French (void **) &req, &total_len); 551538c8a9a5SSteve French if (rc) 551638c8a9a5SSteve French return rc; 551738c8a9a5SSteve French 551838c8a9a5SSteve French req->InfoType = SMB2_O_INFO_FILESYSTEM; 551938c8a9a5SSteve French req->FileInfoClass = level; 552038c8a9a5SSteve French req->PersistentFileId = persistent_fid; 552138c8a9a5SSteve French req->VolatileFileId = volatile_fid; 552238c8a9a5SSteve French /* 1 for pad */ 552338c8a9a5SSteve French req->InputBufferOffset = 552438c8a9a5SSteve French cpu_to_le16(sizeof(struct smb2_query_info_req)); 552538c8a9a5SSteve French req->OutputBufferLength = cpu_to_le32( 552638c8a9a5SSteve French outbuf_len + sizeof(struct smb2_query_info_rsp)); 552738c8a9a5SSteve French 552838c8a9a5SSteve French iov->iov_base = (char *)req; 552938c8a9a5SSteve French iov->iov_len = total_len; 553038c8a9a5SSteve French return 0; 553138c8a9a5SSteve French } 553238c8a9a5SSteve French 55333b5f0d0aSPaulo Alcantara static inline void free_qfs_info_req(struct kvec *iov) 55343b5f0d0aSPaulo Alcantara { 55353b5f0d0aSPaulo Alcantara cifs_buf_release(iov->iov_base); 55363b5f0d0aSPaulo Alcantara } 55373b5f0d0aSPaulo Alcantara 553838c8a9a5SSteve French int 553938c8a9a5SSteve French SMB311_posix_qfs_info(const unsigned int xid, struct cifs_tcon *tcon, 554038c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata) 554138c8a9a5SSteve French { 554238c8a9a5SSteve French struct smb_rqst rqst; 554338c8a9a5SSteve French struct smb2_query_info_rsp *rsp = NULL; 554438c8a9a5SSteve French struct kvec iov; 554538c8a9a5SSteve French struct kvec rsp_iov; 554638c8a9a5SSteve French int rc = 0; 554738c8a9a5SSteve French int resp_buftype; 554838c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 554938c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 555038c8a9a5SSteve French FILE_SYSTEM_POSIX_INFO *info = NULL; 555138c8a9a5SSteve French int flags = 0; 555238c8a9a5SSteve French 555338c8a9a5SSteve French rc = build_qfs_info_req(&iov, tcon, server, 555438c8a9a5SSteve French FS_POSIX_INFORMATION, 555538c8a9a5SSteve French sizeof(FILE_SYSTEM_POSIX_INFO), 555638c8a9a5SSteve French persistent_fid, volatile_fid); 555738c8a9a5SSteve French if (rc) 555838c8a9a5SSteve French return rc; 555938c8a9a5SSteve French 556038c8a9a5SSteve French if (smb3_encryption_required(tcon)) 556138c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 556238c8a9a5SSteve French 556338c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 556438c8a9a5SSteve French rqst.rq_iov = &iov; 556538c8a9a5SSteve French rqst.rq_nvec = 1; 556638c8a9a5SSteve French 556738c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 556838c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 55693b5f0d0aSPaulo Alcantara free_qfs_info_req(&iov); 557038c8a9a5SSteve French if (rc) { 557138c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); 557238c8a9a5SSteve French goto posix_qfsinf_exit; 557338c8a9a5SSteve French } 557438c8a9a5SSteve French rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 557538c8a9a5SSteve French 557638c8a9a5SSteve French info = (FILE_SYSTEM_POSIX_INFO *)( 557738c8a9a5SSteve French le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 557838c8a9a5SSteve French rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 557938c8a9a5SSteve French le32_to_cpu(rsp->OutputBufferLength), &rsp_iov, 558038c8a9a5SSteve French sizeof(FILE_SYSTEM_POSIX_INFO)); 558138c8a9a5SSteve French if (!rc) 558238c8a9a5SSteve French copy_posix_fs_info_to_kstatfs(info, fsdata); 558338c8a9a5SSteve French 558438c8a9a5SSteve French posix_qfsinf_exit: 558538c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp_iov.iov_base); 558638c8a9a5SSteve French return rc; 558738c8a9a5SSteve French } 558838c8a9a5SSteve French 558938c8a9a5SSteve French int 559038c8a9a5SSteve French SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon, 559138c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata) 559238c8a9a5SSteve French { 559338c8a9a5SSteve French struct smb_rqst rqst; 559438c8a9a5SSteve French struct smb2_query_info_rsp *rsp = NULL; 559538c8a9a5SSteve French struct kvec iov; 559638c8a9a5SSteve French struct kvec rsp_iov; 559738c8a9a5SSteve French int rc = 0; 559838c8a9a5SSteve French int resp_buftype; 559938c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 560038c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 560138c8a9a5SSteve French struct smb2_fs_full_size_info *info = NULL; 560238c8a9a5SSteve French int flags = 0; 560338c8a9a5SSteve French 560438c8a9a5SSteve French rc = build_qfs_info_req(&iov, tcon, server, 560538c8a9a5SSteve French FS_FULL_SIZE_INFORMATION, 560638c8a9a5SSteve French sizeof(struct smb2_fs_full_size_info), 560738c8a9a5SSteve French persistent_fid, volatile_fid); 560838c8a9a5SSteve French if (rc) 560938c8a9a5SSteve French return rc; 561038c8a9a5SSteve French 561138c8a9a5SSteve French if (smb3_encryption_required(tcon)) 561238c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 561338c8a9a5SSteve French 561438c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 561538c8a9a5SSteve French rqst.rq_iov = &iov; 561638c8a9a5SSteve French rqst.rq_nvec = 1; 561738c8a9a5SSteve French 561838c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 561938c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 56203b5f0d0aSPaulo Alcantara free_qfs_info_req(&iov); 562138c8a9a5SSteve French if (rc) { 562238c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); 562338c8a9a5SSteve French goto qfsinf_exit; 562438c8a9a5SSteve French } 562538c8a9a5SSteve French rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 562638c8a9a5SSteve French 562738c8a9a5SSteve French info = (struct smb2_fs_full_size_info *)( 562838c8a9a5SSteve French le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 562938c8a9a5SSteve French rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 563038c8a9a5SSteve French le32_to_cpu(rsp->OutputBufferLength), &rsp_iov, 563138c8a9a5SSteve French sizeof(struct smb2_fs_full_size_info)); 563238c8a9a5SSteve French if (!rc) 563338c8a9a5SSteve French smb2_copy_fs_info_to_kstatfs(info, fsdata); 563438c8a9a5SSteve French 563538c8a9a5SSteve French qfsinf_exit: 563638c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp_iov.iov_base); 563738c8a9a5SSteve French return rc; 563838c8a9a5SSteve French } 563938c8a9a5SSteve French 564038c8a9a5SSteve French int 564138c8a9a5SSteve French SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon, 564238c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, int level) 564338c8a9a5SSteve French { 564438c8a9a5SSteve French struct smb_rqst rqst; 564538c8a9a5SSteve French struct smb2_query_info_rsp *rsp = NULL; 564638c8a9a5SSteve French struct kvec iov; 564738c8a9a5SSteve French struct kvec rsp_iov; 564838c8a9a5SSteve French int rc = 0; 564938c8a9a5SSteve French int resp_buftype, max_len, min_len; 565038c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 565138c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 565238c8a9a5SSteve French unsigned int rsp_len, offset; 565338c8a9a5SSteve French int flags = 0; 565438c8a9a5SSteve French 565538c8a9a5SSteve French if (level == FS_DEVICE_INFORMATION) { 565638c8a9a5SSteve French max_len = sizeof(FILE_SYSTEM_DEVICE_INFO); 565738c8a9a5SSteve French min_len = sizeof(FILE_SYSTEM_DEVICE_INFO); 565838c8a9a5SSteve French } else if (level == FS_ATTRIBUTE_INFORMATION) { 565938c8a9a5SSteve French max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO); 566038c8a9a5SSteve French min_len = MIN_FS_ATTR_INFO_SIZE; 566138c8a9a5SSteve French } else if (level == FS_SECTOR_SIZE_INFORMATION) { 566238c8a9a5SSteve French max_len = sizeof(struct smb3_fs_ss_info); 566338c8a9a5SSteve French min_len = sizeof(struct smb3_fs_ss_info); 566438c8a9a5SSteve French } else if (level == FS_VOLUME_INFORMATION) { 566538c8a9a5SSteve French max_len = sizeof(struct smb3_fs_vol_info) + MAX_VOL_LABEL_LEN; 566638c8a9a5SSteve French min_len = sizeof(struct smb3_fs_vol_info); 566738c8a9a5SSteve French } else { 566838c8a9a5SSteve French cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level); 566938c8a9a5SSteve French return -EINVAL; 567038c8a9a5SSteve French } 567138c8a9a5SSteve French 567238c8a9a5SSteve French rc = build_qfs_info_req(&iov, tcon, server, 567338c8a9a5SSteve French level, max_len, 567438c8a9a5SSteve French persistent_fid, volatile_fid); 567538c8a9a5SSteve French if (rc) 567638c8a9a5SSteve French return rc; 567738c8a9a5SSteve French 567838c8a9a5SSteve French if (smb3_encryption_required(tcon)) 567938c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 568038c8a9a5SSteve French 568138c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 568238c8a9a5SSteve French rqst.rq_iov = &iov; 568338c8a9a5SSteve French rqst.rq_nvec = 1; 568438c8a9a5SSteve French 568538c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 568638c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 56873b5f0d0aSPaulo Alcantara free_qfs_info_req(&iov); 568838c8a9a5SSteve French if (rc) { 568938c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); 569038c8a9a5SSteve French goto qfsattr_exit; 569138c8a9a5SSteve French } 569238c8a9a5SSteve French rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 569338c8a9a5SSteve French 569438c8a9a5SSteve French rsp_len = le32_to_cpu(rsp->OutputBufferLength); 569538c8a9a5SSteve French offset = le16_to_cpu(rsp->OutputBufferOffset); 569638c8a9a5SSteve French rc = smb2_validate_iov(offset, rsp_len, &rsp_iov, min_len); 569738c8a9a5SSteve French if (rc) 569838c8a9a5SSteve French goto qfsattr_exit; 569938c8a9a5SSteve French 570038c8a9a5SSteve French if (level == FS_ATTRIBUTE_INFORMATION) 570138c8a9a5SSteve French memcpy(&tcon->fsAttrInfo, offset 570238c8a9a5SSteve French + (char *)rsp, min_t(unsigned int, 570338c8a9a5SSteve French rsp_len, max_len)); 570438c8a9a5SSteve French else if (level == FS_DEVICE_INFORMATION) 570538c8a9a5SSteve French memcpy(&tcon->fsDevInfo, offset 570638c8a9a5SSteve French + (char *)rsp, sizeof(FILE_SYSTEM_DEVICE_INFO)); 570738c8a9a5SSteve French else if (level == FS_SECTOR_SIZE_INFORMATION) { 570838c8a9a5SSteve French struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *) 570938c8a9a5SSteve French (offset + (char *)rsp); 571038c8a9a5SSteve French tcon->ss_flags = le32_to_cpu(ss_info->Flags); 571138c8a9a5SSteve French tcon->perf_sector_size = 571238c8a9a5SSteve French le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf); 571338c8a9a5SSteve French } else if (level == FS_VOLUME_INFORMATION) { 571438c8a9a5SSteve French struct smb3_fs_vol_info *vol_info = (struct smb3_fs_vol_info *) 571538c8a9a5SSteve French (offset + (char *)rsp); 571638c8a9a5SSteve French tcon->vol_serial_number = vol_info->VolumeSerialNumber; 571738c8a9a5SSteve French tcon->vol_create_time = vol_info->VolumeCreationTime; 571838c8a9a5SSteve French } 571938c8a9a5SSteve French 572038c8a9a5SSteve French qfsattr_exit: 572138c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp_iov.iov_base); 572238c8a9a5SSteve French return rc; 572338c8a9a5SSteve French } 572438c8a9a5SSteve French 572538c8a9a5SSteve French int 572638c8a9a5SSteve French smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon, 572738c8a9a5SSteve French const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, 572838c8a9a5SSteve French const __u32 num_lock, struct smb2_lock_element *buf) 572938c8a9a5SSteve French { 573038c8a9a5SSteve French struct smb_rqst rqst; 573138c8a9a5SSteve French int rc = 0; 573238c8a9a5SSteve French struct smb2_lock_req *req = NULL; 573338c8a9a5SSteve French struct kvec iov[2]; 573438c8a9a5SSteve French struct kvec rsp_iov; 573538c8a9a5SSteve French int resp_buf_type; 573638c8a9a5SSteve French unsigned int count; 573738c8a9a5SSteve French int flags = CIFS_NO_RSP_BUF; 573838c8a9a5SSteve French unsigned int total_len; 573938c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses); 574038c8a9a5SSteve French 574138c8a9a5SSteve French cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock); 574238c8a9a5SSteve French 574338c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_LOCK, tcon, server, 574438c8a9a5SSteve French (void **) &req, &total_len); 574538c8a9a5SSteve French if (rc) 574638c8a9a5SSteve French return rc; 574738c8a9a5SSteve French 574838c8a9a5SSteve French if (smb3_encryption_required(tcon)) 574938c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 575038c8a9a5SSteve French 575138c8a9a5SSteve French req->hdr.Id.SyncId.ProcessId = cpu_to_le32(pid); 575238c8a9a5SSteve French req->LockCount = cpu_to_le16(num_lock); 575338c8a9a5SSteve French 575438c8a9a5SSteve French req->PersistentFileId = persist_fid; 575538c8a9a5SSteve French req->VolatileFileId = volatile_fid; 575638c8a9a5SSteve French 575738c8a9a5SSteve French count = num_lock * sizeof(struct smb2_lock_element); 575838c8a9a5SSteve French 575938c8a9a5SSteve French iov[0].iov_base = (char *)req; 576038c8a9a5SSteve French iov[0].iov_len = total_len - sizeof(struct smb2_lock_element); 576138c8a9a5SSteve French iov[1].iov_base = (char *)buf; 576238c8a9a5SSteve French iov[1].iov_len = count; 576338c8a9a5SSteve French 576438c8a9a5SSteve French cifs_stats_inc(&tcon->stats.cifs_stats.num_locks); 576538c8a9a5SSteve French 576638c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 576738c8a9a5SSteve French rqst.rq_iov = iov; 576838c8a9a5SSteve French rqst.rq_nvec = 2; 576938c8a9a5SSteve French 577038c8a9a5SSteve French rc = cifs_send_recv(xid, tcon->ses, server, 577138c8a9a5SSteve French &rqst, &resp_buf_type, flags, 577238c8a9a5SSteve French &rsp_iov); 577338c8a9a5SSteve French cifs_small_buf_release(req); 577438c8a9a5SSteve French if (rc) { 577538c8a9a5SSteve French cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc); 577638c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_LOCK_HE); 577738c8a9a5SSteve French trace_smb3_lock_err(xid, persist_fid, tcon->tid, 577838c8a9a5SSteve French tcon->ses->Suid, rc); 577938c8a9a5SSteve French } 578038c8a9a5SSteve French 578138c8a9a5SSteve French return rc; 578238c8a9a5SSteve French } 578338c8a9a5SSteve French 578438c8a9a5SSteve French int 578538c8a9a5SSteve French SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon, 578638c8a9a5SSteve French const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, 578738c8a9a5SSteve French const __u64 length, const __u64 offset, const __u32 lock_flags, 578838c8a9a5SSteve French const bool wait) 578938c8a9a5SSteve French { 579038c8a9a5SSteve French struct smb2_lock_element lock; 579138c8a9a5SSteve French 579238c8a9a5SSteve French lock.Offset = cpu_to_le64(offset); 579338c8a9a5SSteve French lock.Length = cpu_to_le64(length); 579438c8a9a5SSteve French lock.Flags = cpu_to_le32(lock_flags); 579538c8a9a5SSteve French if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK) 579638c8a9a5SSteve French lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY); 579738c8a9a5SSteve French 579838c8a9a5SSteve French return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock); 579938c8a9a5SSteve French } 580038c8a9a5SSteve French 580138c8a9a5SSteve French int 580238c8a9a5SSteve French SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon, 580338c8a9a5SSteve French __u8 *lease_key, const __le32 lease_state) 580438c8a9a5SSteve French { 580538c8a9a5SSteve French struct smb_rqst rqst; 580638c8a9a5SSteve French int rc; 580738c8a9a5SSteve French struct smb2_lease_ack *req = NULL; 580838c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 580938c8a9a5SSteve French int flags = CIFS_OBREAK_OP; 581038c8a9a5SSteve French unsigned int total_len; 581138c8a9a5SSteve French struct kvec iov[1]; 581238c8a9a5SSteve French struct kvec rsp_iov; 581338c8a9a5SSteve French int resp_buf_type; 581438c8a9a5SSteve French __u64 *please_key_high; 581538c8a9a5SSteve French __u64 *please_key_low; 581638c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses); 581738c8a9a5SSteve French 581838c8a9a5SSteve French cifs_dbg(FYI, "SMB2_lease_break\n"); 581938c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, server, 582038c8a9a5SSteve French (void **) &req, &total_len); 582138c8a9a5SSteve French if (rc) 582238c8a9a5SSteve French return rc; 582338c8a9a5SSteve French 582438c8a9a5SSteve French if (smb3_encryption_required(tcon)) 582538c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 582638c8a9a5SSteve French 582738c8a9a5SSteve French req->hdr.CreditRequest = cpu_to_le16(1); 582838c8a9a5SSteve French req->StructureSize = cpu_to_le16(36); 582938c8a9a5SSteve French total_len += 12; 583038c8a9a5SSteve French 583138c8a9a5SSteve French memcpy(req->LeaseKey, lease_key, 16); 583238c8a9a5SSteve French req->LeaseState = lease_state; 583338c8a9a5SSteve French 583438c8a9a5SSteve French flags |= CIFS_NO_RSP_BUF; 583538c8a9a5SSteve French 583638c8a9a5SSteve French iov[0].iov_base = (char *)req; 583738c8a9a5SSteve French iov[0].iov_len = total_len; 583838c8a9a5SSteve French 583938c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 584038c8a9a5SSteve French rqst.rq_iov = iov; 584138c8a9a5SSteve French rqst.rq_nvec = 1; 584238c8a9a5SSteve French 584338c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 584438c8a9a5SSteve French &rqst, &resp_buf_type, flags, &rsp_iov); 584538c8a9a5SSteve French cifs_small_buf_release(req); 584638c8a9a5SSteve French 584738c8a9a5SSteve French please_key_low = (__u64 *)lease_key; 584838c8a9a5SSteve French please_key_high = (__u64 *)(lease_key+8); 584938c8a9a5SSteve French if (rc) { 585038c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); 585138c8a9a5SSteve French trace_smb3_lease_err(le32_to_cpu(lease_state), tcon->tid, 585238c8a9a5SSteve French ses->Suid, *please_key_low, *please_key_high, rc); 585338c8a9a5SSteve French cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc); 585438c8a9a5SSteve French } else 585538c8a9a5SSteve French trace_smb3_lease_done(le32_to_cpu(lease_state), tcon->tid, 585638c8a9a5SSteve French ses->Suid, *please_key_low, *please_key_high); 585738c8a9a5SSteve French 585838c8a9a5SSteve French return rc; 585938c8a9a5SSteve French } 5860