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 15938c8a9a5SSteve French static int 16038c8a9a5SSteve French smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon, 161*07e86408SShyam Prasad N struct TCP_Server_Info *server, bool from_reconnect) 16238c8a9a5SSteve French { 16338c8a9a5SSteve French int rc = 0; 16438c8a9a5SSteve French struct nls_table *nls_codepage = NULL; 16538c8a9a5SSteve French struct cifs_ses *ses; 1665075e9f4SShyam Prasad N int xid; 1673e161536SShyam Prasad N struct TCP_Server_Info *pserver; 1683e161536SShyam Prasad N unsigned int chan_index; 16938c8a9a5SSteve French 17038c8a9a5SSteve French /* 17138c8a9a5SSteve French * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so 17238c8a9a5SSteve French * check for tcp and smb session status done differently 17338c8a9a5SSteve French * for those three - in the calling routine. 17438c8a9a5SSteve French */ 17538c8a9a5SSteve French if (tcon == NULL) 17638c8a9a5SSteve French return 0; 17738c8a9a5SSteve French 17838c8a9a5SSteve French /* 17938c8a9a5SSteve French * Need to also skip SMB2_IOCTL because it is used for checking nested dfs links in 18038c8a9a5SSteve French * cifs_tree_connect(). 18138c8a9a5SSteve French */ 18238c8a9a5SSteve French if (smb2_command == SMB2_TREE_CONNECT || smb2_command == SMB2_IOCTL) 18338c8a9a5SSteve French return 0; 18438c8a9a5SSteve French 18538c8a9a5SSteve French spin_lock(&tcon->tc_lock); 18638c8a9a5SSteve French if (tcon->status == TID_EXITING) { 18738c8a9a5SSteve French /* 18838c8a9a5SSteve French * only tree disconnect allowed when disconnecting ... 18938c8a9a5SSteve French */ 19038c8a9a5SSteve French if (smb2_command != SMB2_TREE_DISCONNECT) { 19138c8a9a5SSteve French spin_unlock(&tcon->tc_lock); 19238c8a9a5SSteve French cifs_dbg(FYI, "can not send cmd %d while umounting\n", 19338c8a9a5SSteve French smb2_command); 19438c8a9a5SSteve French return -ENODEV; 19538c8a9a5SSteve French } 19638c8a9a5SSteve French } 19738c8a9a5SSteve French spin_unlock(&tcon->tc_lock); 19838c8a9a5SSteve French 19938c8a9a5SSteve French ses = tcon->ses; 20038c8a9a5SSteve French if (!ses) 20138c8a9a5SSteve French return -EIO; 20238c8a9a5SSteve French spin_lock(&ses->ses_lock); 20338c8a9a5SSteve French if (ses->ses_status == SES_EXITING) { 20438c8a9a5SSteve French spin_unlock(&ses->ses_lock); 20538c8a9a5SSteve French return -EIO; 20638c8a9a5SSteve French } 20738c8a9a5SSteve French spin_unlock(&ses->ses_lock); 20838c8a9a5SSteve French if (!ses->server || !server) 20938c8a9a5SSteve French return -EIO; 21038c8a9a5SSteve French 21138c8a9a5SSteve French spin_lock(&server->srv_lock); 21238c8a9a5SSteve French if (server->tcpStatus == CifsNeedReconnect) { 21338c8a9a5SSteve French /* 21438c8a9a5SSteve French * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE 21538c8a9a5SSteve French * here since they are implicitly done when session drops. 21638c8a9a5SSteve French */ 21738c8a9a5SSteve French switch (smb2_command) { 21838c8a9a5SSteve French /* 21938c8a9a5SSteve French * BB Should we keep oplock break and add flush to exceptions? 22038c8a9a5SSteve French */ 22138c8a9a5SSteve French case SMB2_TREE_DISCONNECT: 22238c8a9a5SSteve French case SMB2_CANCEL: 22338c8a9a5SSteve French case SMB2_CLOSE: 22438c8a9a5SSteve French case SMB2_OPLOCK_BREAK: 22538c8a9a5SSteve French spin_unlock(&server->srv_lock); 22638c8a9a5SSteve French return -EAGAIN; 22738c8a9a5SSteve French } 22838c8a9a5SSteve French } 2293e161536SShyam Prasad N 2303e161536SShyam Prasad N /* if server is marked for termination, cifsd will cleanup */ 2313e161536SShyam Prasad N if (server->terminate) { 2323e161536SShyam Prasad N spin_unlock(&server->srv_lock); 2333e161536SShyam Prasad N return -EHOSTDOWN; 2343e161536SShyam Prasad N } 23538c8a9a5SSteve French spin_unlock(&server->srv_lock); 23638c8a9a5SSteve French 23738c8a9a5SSteve French again: 23838c8a9a5SSteve French rc = cifs_wait_for_server_reconnect(server, tcon->retry); 23938c8a9a5SSteve French if (rc) 24038c8a9a5SSteve French return rc; 24138c8a9a5SSteve French 24238c8a9a5SSteve French spin_lock(&ses->chan_lock); 24338c8a9a5SSteve French if (!cifs_chan_needs_reconnect(ses, server) && !tcon->need_reconnect) { 24438c8a9a5SSteve French spin_unlock(&ses->chan_lock); 24538c8a9a5SSteve French return 0; 24638c8a9a5SSteve French } 24738c8a9a5SSteve French spin_unlock(&ses->chan_lock); 24838c8a9a5SSteve French cifs_dbg(FYI, "sess reconnect mask: 0x%lx, tcon reconnect: %d", 24938c8a9a5SSteve French tcon->ses->chans_need_reconnect, 25038c8a9a5SSteve French tcon->need_reconnect); 25138c8a9a5SSteve French 25238c8a9a5SSteve French mutex_lock(&ses->session_mutex); 25338c8a9a5SSteve French /* 2543e161536SShyam Prasad N * if this is called by delayed work, and the channel has been disabled 2553e161536SShyam Prasad N * in parallel, the delayed work can continue to execute in parallel 2563e161536SShyam Prasad N * there's a chance that this channel may not exist anymore 2573e161536SShyam Prasad N */ 2583e161536SShyam Prasad N spin_lock(&server->srv_lock); 2593e161536SShyam Prasad N if (server->tcpStatus == CifsExiting) { 2603e161536SShyam Prasad N spin_unlock(&server->srv_lock); 2613e161536SShyam Prasad N mutex_unlock(&ses->session_mutex); 2623e161536SShyam Prasad N rc = -EHOSTDOWN; 2633e161536SShyam Prasad N goto out; 2643e161536SShyam Prasad N } 2653e161536SShyam Prasad N 2663e161536SShyam Prasad N /* 26738c8a9a5SSteve French * Recheck after acquire mutex. If another thread is negotiating 26838c8a9a5SSteve French * and the server never sends an answer the socket will be closed 26938c8a9a5SSteve French * and tcpStatus set to reconnect. 27038c8a9a5SSteve French */ 27138c8a9a5SSteve French if (server->tcpStatus == CifsNeedReconnect) { 27238c8a9a5SSteve French spin_unlock(&server->srv_lock); 27338c8a9a5SSteve French mutex_unlock(&ses->session_mutex); 27438c8a9a5SSteve French 27538c8a9a5SSteve French if (tcon->retry) 27638c8a9a5SSteve French goto again; 27738c8a9a5SSteve French 27838c8a9a5SSteve French rc = -EHOSTDOWN; 27938c8a9a5SSteve French goto out; 28038c8a9a5SSteve French } 28138c8a9a5SSteve French spin_unlock(&server->srv_lock); 28238c8a9a5SSteve French 283a43f95fdSWinston Wen nls_codepage = ses->local_nls; 28438c8a9a5SSteve French 28538c8a9a5SSteve French /* 28638c8a9a5SSteve French * need to prevent multiple threads trying to simultaneously 28738c8a9a5SSteve French * reconnect the same SMB session 28838c8a9a5SSteve French */ 28938c8a9a5SSteve French spin_lock(&ses->ses_lock); 29038c8a9a5SSteve French spin_lock(&ses->chan_lock); 29138c8a9a5SSteve French if (!cifs_chan_needs_reconnect(ses, server) && 29238c8a9a5SSteve French ses->ses_status == SES_GOOD) { 29338c8a9a5SSteve French spin_unlock(&ses->chan_lock); 29438c8a9a5SSteve French spin_unlock(&ses->ses_lock); 29538c8a9a5SSteve French /* this means that we only need to tree connect */ 29638c8a9a5SSteve French if (tcon->need_reconnect) 29738c8a9a5SSteve French goto skip_sess_setup; 29838c8a9a5SSteve French 29938c8a9a5SSteve French mutex_unlock(&ses->session_mutex); 30038c8a9a5SSteve French goto out; 30138c8a9a5SSteve French } 30238c8a9a5SSteve French spin_unlock(&ses->chan_lock); 30338c8a9a5SSteve French spin_unlock(&ses->ses_lock); 30438c8a9a5SSteve French 30538c8a9a5SSteve French rc = cifs_negotiate_protocol(0, ses, server); 30638c8a9a5SSteve French if (!rc) { 3073e161536SShyam Prasad N /* 3083e161536SShyam Prasad N * if server stopped supporting multichannel 3093e161536SShyam Prasad N * and the first channel reconnected, disable all the others. 3103e161536SShyam Prasad N */ 3113e161536SShyam Prasad N if (ses->chan_count > 1 && 3123e161536SShyam Prasad N !(server->capabilities & SMB2_GLOBAL_CAP_MULTI_CHANNEL)) { 3133e161536SShyam Prasad N if (SERVER_IS_CHAN(server)) { 3143e161536SShyam Prasad N cifs_dbg(VFS, "server %s does not support " \ 3153e161536SShyam Prasad N "multichannel anymore. skipping secondary channel\n", 3163e161536SShyam Prasad N ses->server->hostname); 3173e161536SShyam Prasad N 3183e161536SShyam Prasad N spin_lock(&ses->chan_lock); 3193e161536SShyam Prasad N chan_index = cifs_ses_get_chan_index(ses, server); 3203e161536SShyam Prasad N if (chan_index == CIFS_INVAL_CHAN_INDEX) { 3213e161536SShyam Prasad N spin_unlock(&ses->chan_lock); 3223e161536SShyam Prasad N goto skip_terminate; 3233e161536SShyam Prasad N } 3243e161536SShyam Prasad N 3253e161536SShyam Prasad N ses->chans[chan_index].server = NULL; 3263e161536SShyam Prasad N spin_unlock(&ses->chan_lock); 3273e161536SShyam Prasad N 3283e161536SShyam Prasad N /* 3293e161536SShyam Prasad N * the above reference of server by channel 3303e161536SShyam Prasad N * needs to be dropped without holding chan_lock 3313e161536SShyam Prasad N * as cifs_put_tcp_session takes a higher lock 3323e161536SShyam Prasad N * i.e. cifs_tcp_ses_lock 3333e161536SShyam Prasad N */ 334*07e86408SShyam Prasad N cifs_put_tcp_session(server, from_reconnect); 3353e161536SShyam Prasad N 3363e161536SShyam Prasad N server->terminate = true; 3373e161536SShyam Prasad N cifs_signal_cifsd_for_reconnect(server, false); 3383e161536SShyam Prasad N 3393e161536SShyam Prasad N /* mark primary server as needing reconnect */ 3403e161536SShyam Prasad N pserver = server->primary_server; 3413e161536SShyam Prasad N cifs_signal_cifsd_for_reconnect(pserver, false); 3423e161536SShyam Prasad N 3433e161536SShyam Prasad N skip_terminate: 3443e161536SShyam Prasad N mutex_unlock(&ses->session_mutex); 3453e161536SShyam Prasad N rc = -EHOSTDOWN; 3463e161536SShyam Prasad N goto out; 3473e161536SShyam Prasad N } else { 3483e161536SShyam Prasad N cifs_server_dbg(VFS, "does not support " \ 3493e161536SShyam Prasad N "multichannel anymore. disabling all other channels\n"); 3503e161536SShyam Prasad N cifs_disable_secondary_channels(ses); 3513e161536SShyam Prasad N } 3523e161536SShyam Prasad N } 3533e161536SShyam Prasad N 35438c8a9a5SSteve French rc = cifs_setup_session(0, ses, server, nls_codepage); 35538c8a9a5SSteve French if ((rc == -EACCES) && !tcon->retry) { 35638c8a9a5SSteve French mutex_unlock(&ses->session_mutex); 35738c8a9a5SSteve French rc = -EHOSTDOWN; 35838c8a9a5SSteve French goto failed; 35938c8a9a5SSteve French } else if (rc) { 36038c8a9a5SSteve French mutex_unlock(&ses->session_mutex); 36138c8a9a5SSteve French goto out; 36238c8a9a5SSteve French } 36338c8a9a5SSteve French } else { 36438c8a9a5SSteve French mutex_unlock(&ses->session_mutex); 36538c8a9a5SSteve French goto out; 36638c8a9a5SSteve French } 36738c8a9a5SSteve French 36838c8a9a5SSteve French skip_sess_setup: 36938c8a9a5SSteve French if (!tcon->need_reconnect) { 37038c8a9a5SSteve French mutex_unlock(&ses->session_mutex); 37138c8a9a5SSteve French goto out; 37238c8a9a5SSteve French } 37338c8a9a5SSteve French cifs_mark_open_files_invalid(tcon); 37438c8a9a5SSteve French if (tcon->use_persistent) 37538c8a9a5SSteve French tcon->need_reopen_files = true; 37638c8a9a5SSteve French 37738c8a9a5SSteve French rc = cifs_tree_connect(0, tcon, nls_codepage); 37838c8a9a5SSteve French 37938c8a9a5SSteve French cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc); 38038c8a9a5SSteve French if (rc) { 38138c8a9a5SSteve French /* If sess reconnected but tcon didn't, something strange ... */ 3825075e9f4SShyam Prasad N mutex_unlock(&ses->session_mutex); 38338c8a9a5SSteve French cifs_dbg(VFS, "reconnect tcon failed rc = %d\n", rc); 38438c8a9a5SSteve French goto out; 38538c8a9a5SSteve French } 38638c8a9a5SSteve French 3875075e9f4SShyam Prasad N if (!rc && 3885075e9f4SShyam Prasad N (server->capabilities & SMB2_GLOBAL_CAP_MULTI_CHANNEL)) { 3895075e9f4SShyam Prasad N mutex_unlock(&ses->session_mutex); 3905075e9f4SShyam Prasad N 3915075e9f4SShyam Prasad N /* 3925075e9f4SShyam Prasad N * query server network interfaces, in case they change 3935075e9f4SShyam Prasad N */ 3945075e9f4SShyam Prasad N xid = get_xid(); 3955075e9f4SShyam Prasad N rc = SMB3_request_interfaces(xid, tcon, false); 3965075e9f4SShyam Prasad N free_xid(xid); 3975075e9f4SShyam Prasad N 3985075e9f4SShyam Prasad N if (rc) 3995075e9f4SShyam Prasad N cifs_dbg(FYI, "%s: failed to query server interfaces: %d\n", 4005075e9f4SShyam Prasad N __func__, rc); 4015075e9f4SShyam Prasad N 4025075e9f4SShyam Prasad N if (ses->chan_max > ses->chan_count && 4035075e9f4SShyam Prasad N !SERVER_IS_CHAN(server)) { 4045075e9f4SShyam Prasad N if (ses->chan_count == 1) 4055075e9f4SShyam Prasad N cifs_server_dbg(VFS, "supports multichannel now\n"); 4065075e9f4SShyam Prasad N 4075075e9f4SShyam Prasad N cifs_try_adding_channels(ses); 4085075e9f4SShyam Prasad N } 4095075e9f4SShyam Prasad N } else { 4105075e9f4SShyam Prasad N mutex_unlock(&ses->session_mutex); 4115075e9f4SShyam Prasad N } 4125075e9f4SShyam Prasad N 41338c8a9a5SSteve French if (smb2_command != SMB2_INTERNAL_CMD) 4145075e9f4SShyam Prasad N if (mod_delayed_work(cifsiod_wq, &server->reconnect, 0)) 4155075e9f4SShyam Prasad N cifs_put_tcp_session(server, false); 41638c8a9a5SSteve French 41738c8a9a5SSteve French atomic_inc(&tconInfoReconnectCount); 41838c8a9a5SSteve French out: 41938c8a9a5SSteve French /* 42038c8a9a5SSteve French * Check if handle based operation so we know whether we can continue 42138c8a9a5SSteve French * or not without returning to caller to reset file handle. 42238c8a9a5SSteve French */ 42338c8a9a5SSteve French /* 42438c8a9a5SSteve French * BB Is flush done by server on drop of tcp session? Should we special 42538c8a9a5SSteve French * case it and skip above? 42638c8a9a5SSteve French */ 42738c8a9a5SSteve French switch (smb2_command) { 42838c8a9a5SSteve French case SMB2_FLUSH: 42938c8a9a5SSteve French case SMB2_READ: 43038c8a9a5SSteve French case SMB2_WRITE: 43138c8a9a5SSteve French case SMB2_LOCK: 43238c8a9a5SSteve French case SMB2_QUERY_DIRECTORY: 43338c8a9a5SSteve French case SMB2_CHANGE_NOTIFY: 43438c8a9a5SSteve French case SMB2_QUERY_INFO: 43538c8a9a5SSteve French case SMB2_SET_INFO: 43638c8a9a5SSteve French rc = -EAGAIN; 43738c8a9a5SSteve French } 43838c8a9a5SSteve French failed: 43938c8a9a5SSteve French return rc; 44038c8a9a5SSteve French } 44138c8a9a5SSteve French 44238c8a9a5SSteve French static void 44338c8a9a5SSteve French fill_small_buf(__le16 smb2_command, struct cifs_tcon *tcon, 44438c8a9a5SSteve French struct TCP_Server_Info *server, 44538c8a9a5SSteve French void *buf, 44638c8a9a5SSteve French unsigned int *total_len) 44738c8a9a5SSteve French { 44838c8a9a5SSteve French struct smb2_pdu *spdu = buf; 44938c8a9a5SSteve French /* lookup word count ie StructureSize from table */ 45038c8a9a5SSteve French __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_command)]; 45138c8a9a5SSteve French 45238c8a9a5SSteve French /* 45338c8a9a5SSteve French * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of 45438c8a9a5SSteve French * largest operations (Create) 45538c8a9a5SSteve French */ 45638c8a9a5SSteve French memset(buf, 0, 256); 45738c8a9a5SSteve French 45838c8a9a5SSteve French smb2_hdr_assemble(&spdu->hdr, smb2_command, tcon, server); 45938c8a9a5SSteve French spdu->StructureSize2 = cpu_to_le16(parmsize); 46038c8a9a5SSteve French 46138c8a9a5SSteve French *total_len = parmsize + sizeof(struct smb2_hdr); 46238c8a9a5SSteve French } 46338c8a9a5SSteve French 46438c8a9a5SSteve French /* 46538c8a9a5SSteve French * Allocate and return pointer to an SMB request hdr, and set basic 46638c8a9a5SSteve French * SMB information in the SMB header. If the return code is zero, this 46738c8a9a5SSteve French * function must have filled in request_buf pointer. 46838c8a9a5SSteve French */ 46938c8a9a5SSteve French static int __smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon, 47038c8a9a5SSteve French struct TCP_Server_Info *server, 47138c8a9a5SSteve French void **request_buf, unsigned int *total_len) 47238c8a9a5SSteve French { 47338c8a9a5SSteve French /* BB eventually switch this to SMB2 specific small buf size */ 4743b5f0d0aSPaulo Alcantara switch (smb2_command) { 4753b5f0d0aSPaulo Alcantara case SMB2_SET_INFO: 4763b5f0d0aSPaulo Alcantara case SMB2_QUERY_INFO: 47738c8a9a5SSteve French *request_buf = cifs_buf_get(); 4783b5f0d0aSPaulo Alcantara break; 4793b5f0d0aSPaulo Alcantara default: 48038c8a9a5SSteve French *request_buf = cifs_small_buf_get(); 4813b5f0d0aSPaulo Alcantara break; 4823b5f0d0aSPaulo Alcantara } 48338c8a9a5SSteve French if (*request_buf == NULL) { 48438c8a9a5SSteve French /* BB should we add a retry in here if not a writepage? */ 48538c8a9a5SSteve French return -ENOMEM; 48638c8a9a5SSteve French } 48738c8a9a5SSteve French 48838c8a9a5SSteve French fill_small_buf(smb2_command, tcon, server, 48938c8a9a5SSteve French (struct smb2_hdr *)(*request_buf), 49038c8a9a5SSteve French total_len); 49138c8a9a5SSteve French 49238c8a9a5SSteve French if (tcon != NULL) { 49338c8a9a5SSteve French uint16_t com_code = le16_to_cpu(smb2_command); 49438c8a9a5SSteve French cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]); 49538c8a9a5SSteve French cifs_stats_inc(&tcon->num_smbs_sent); 49638c8a9a5SSteve French } 49738c8a9a5SSteve French 49838c8a9a5SSteve French return 0; 49938c8a9a5SSteve French } 50038c8a9a5SSteve French 50138c8a9a5SSteve French static int smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon, 50238c8a9a5SSteve French struct TCP_Server_Info *server, 50338c8a9a5SSteve French void **request_buf, unsigned int *total_len) 50438c8a9a5SSteve French { 50538c8a9a5SSteve French int rc; 50638c8a9a5SSteve French 507*07e86408SShyam Prasad N rc = smb2_reconnect(smb2_command, tcon, server, false); 50838c8a9a5SSteve French if (rc) 50938c8a9a5SSteve French return rc; 51038c8a9a5SSteve French 51138c8a9a5SSteve French return __smb2_plain_req_init(smb2_command, tcon, server, request_buf, 51238c8a9a5SSteve French total_len); 51338c8a9a5SSteve French } 51438c8a9a5SSteve French 51538c8a9a5SSteve French static int smb2_ioctl_req_init(u32 opcode, struct cifs_tcon *tcon, 51638c8a9a5SSteve French struct TCP_Server_Info *server, 51738c8a9a5SSteve French void **request_buf, unsigned int *total_len) 51838c8a9a5SSteve French { 51938c8a9a5SSteve French /* Skip reconnect only for FSCTL_VALIDATE_NEGOTIATE_INFO IOCTLs */ 52038c8a9a5SSteve French if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO) { 52138c8a9a5SSteve French return __smb2_plain_req_init(SMB2_IOCTL, tcon, server, 52238c8a9a5SSteve French request_buf, total_len); 52338c8a9a5SSteve French } 52438c8a9a5SSteve French return smb2_plain_req_init(SMB2_IOCTL, tcon, server, 52538c8a9a5SSteve French request_buf, total_len); 52638c8a9a5SSteve French } 52738c8a9a5SSteve French 52838c8a9a5SSteve French /* For explanation of negotiate contexts see MS-SMB2 section 2.2.3.1 */ 52938c8a9a5SSteve French 53038c8a9a5SSteve French static void 53138c8a9a5SSteve French build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt) 53238c8a9a5SSteve French { 53338c8a9a5SSteve French pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES; 53438c8a9a5SSteve French pneg_ctxt->DataLength = cpu_to_le16(38); 53538c8a9a5SSteve French pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1); 53638c8a9a5SSteve French pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE); 53738c8a9a5SSteve French get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE); 53838c8a9a5SSteve French pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512; 53938c8a9a5SSteve French } 54038c8a9a5SSteve French 54138c8a9a5SSteve French static void 54238c8a9a5SSteve French build_compression_ctxt(struct smb2_compression_capabilities_context *pneg_ctxt) 54338c8a9a5SSteve French { 54438c8a9a5SSteve French pneg_ctxt->ContextType = SMB2_COMPRESSION_CAPABILITIES; 54538c8a9a5SSteve French pneg_ctxt->DataLength = 54638c8a9a5SSteve French cpu_to_le16(sizeof(struct smb2_compression_capabilities_context) 54738c8a9a5SSteve French - sizeof(struct smb2_neg_context)); 54838c8a9a5SSteve French pneg_ctxt->CompressionAlgorithmCount = cpu_to_le16(3); 54938c8a9a5SSteve French pneg_ctxt->CompressionAlgorithms[0] = SMB3_COMPRESS_LZ77; 55038c8a9a5SSteve French pneg_ctxt->CompressionAlgorithms[1] = SMB3_COMPRESS_LZ77_HUFF; 55138c8a9a5SSteve French pneg_ctxt->CompressionAlgorithms[2] = SMB3_COMPRESS_LZNT1; 55238c8a9a5SSteve French } 55338c8a9a5SSteve French 55438c8a9a5SSteve French static unsigned int 55538c8a9a5SSteve French build_signing_ctxt(struct smb2_signing_capabilities *pneg_ctxt) 55638c8a9a5SSteve French { 55738c8a9a5SSteve French unsigned int ctxt_len = sizeof(struct smb2_signing_capabilities); 55838c8a9a5SSteve French unsigned short num_algs = 1; /* number of signing algorithms sent */ 55938c8a9a5SSteve French 56038c8a9a5SSteve French pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES; 56138c8a9a5SSteve French /* 56238c8a9a5SSteve French * Context Data length must be rounded to multiple of 8 for some servers 56338c8a9a5SSteve French */ 56438c8a9a5SSteve French pneg_ctxt->DataLength = cpu_to_le16(ALIGN(sizeof(struct smb2_signing_capabilities) - 56538c8a9a5SSteve French sizeof(struct smb2_neg_context) + 56638c8a9a5SSteve French (num_algs * sizeof(u16)), 8)); 56738c8a9a5SSteve French pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(num_algs); 56838c8a9a5SSteve French pneg_ctxt->SigningAlgorithms[0] = cpu_to_le16(SIGNING_ALG_AES_CMAC); 56938c8a9a5SSteve French 57038c8a9a5SSteve French ctxt_len += sizeof(__le16) * num_algs; 57138c8a9a5SSteve French ctxt_len = ALIGN(ctxt_len, 8); 57238c8a9a5SSteve French return ctxt_len; 57338c8a9a5SSteve French /* TBD add SIGNING_ALG_AES_GMAC and/or SIGNING_ALG_HMAC_SHA256 */ 57438c8a9a5SSteve French } 57538c8a9a5SSteve French 57638c8a9a5SSteve French static void 57738c8a9a5SSteve French build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt) 57838c8a9a5SSteve French { 57938c8a9a5SSteve French pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES; 58038c8a9a5SSteve French if (require_gcm_256) { 58138c8a9a5SSteve French pneg_ctxt->DataLength = cpu_to_le16(4); /* Cipher Count + 1 cipher */ 58238c8a9a5SSteve French pneg_ctxt->CipherCount = cpu_to_le16(1); 58338c8a9a5SSteve French pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES256_GCM; 58438c8a9a5SSteve French } else if (enable_gcm_256) { 58538c8a9a5SSteve French pneg_ctxt->DataLength = cpu_to_le16(8); /* Cipher Count + 3 ciphers */ 58638c8a9a5SSteve French pneg_ctxt->CipherCount = cpu_to_le16(3); 58738c8a9a5SSteve French pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM; 58838c8a9a5SSteve French pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES256_GCM; 58938c8a9a5SSteve French pneg_ctxt->Ciphers[2] = SMB2_ENCRYPTION_AES128_CCM; 59038c8a9a5SSteve French } else { 59138c8a9a5SSteve French pneg_ctxt->DataLength = cpu_to_le16(6); /* Cipher Count + 2 ciphers */ 59238c8a9a5SSteve French pneg_ctxt->CipherCount = cpu_to_le16(2); 59338c8a9a5SSteve French pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM; 59438c8a9a5SSteve French pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES128_CCM; 59538c8a9a5SSteve French } 59638c8a9a5SSteve French } 59738c8a9a5SSteve French 59838c8a9a5SSteve French static unsigned int 59938c8a9a5SSteve French build_netname_ctxt(struct smb2_netname_neg_context *pneg_ctxt, char *hostname) 60038c8a9a5SSteve French { 60138c8a9a5SSteve French struct nls_table *cp = load_nls_default(); 60238c8a9a5SSteve French 60338c8a9a5SSteve French pneg_ctxt->ContextType = SMB2_NETNAME_NEGOTIATE_CONTEXT_ID; 60438c8a9a5SSteve French 60538c8a9a5SSteve French /* copy up to max of first 100 bytes of server name to NetName field */ 60638c8a9a5SSteve French pneg_ctxt->DataLength = cpu_to_le16(2 * cifs_strtoUTF16(pneg_ctxt->NetName, hostname, 100, cp)); 60738c8a9a5SSteve French /* context size is DataLength + minimal smb2_neg_context */ 60838c8a9a5SSteve French return ALIGN(le16_to_cpu(pneg_ctxt->DataLength) + sizeof(struct smb2_neg_context), 8); 60938c8a9a5SSteve French } 61038c8a9a5SSteve French 61138c8a9a5SSteve French static void 61238c8a9a5SSteve French build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt) 61338c8a9a5SSteve French { 61438c8a9a5SSteve French pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE; 61538c8a9a5SSteve French pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN); 61638c8a9a5SSteve French /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */ 61738c8a9a5SSteve French pneg_ctxt->Name[0] = 0x93; 61838c8a9a5SSteve French pneg_ctxt->Name[1] = 0xAD; 61938c8a9a5SSteve French pneg_ctxt->Name[2] = 0x25; 62038c8a9a5SSteve French pneg_ctxt->Name[3] = 0x50; 62138c8a9a5SSteve French pneg_ctxt->Name[4] = 0x9C; 62238c8a9a5SSteve French pneg_ctxt->Name[5] = 0xB4; 62338c8a9a5SSteve French pneg_ctxt->Name[6] = 0x11; 62438c8a9a5SSteve French pneg_ctxt->Name[7] = 0xE7; 62538c8a9a5SSteve French pneg_ctxt->Name[8] = 0xB4; 62638c8a9a5SSteve French pneg_ctxt->Name[9] = 0x23; 62738c8a9a5SSteve French pneg_ctxt->Name[10] = 0x83; 62838c8a9a5SSteve French pneg_ctxt->Name[11] = 0xDE; 62938c8a9a5SSteve French pneg_ctxt->Name[12] = 0x96; 63038c8a9a5SSteve French pneg_ctxt->Name[13] = 0x8B; 63138c8a9a5SSteve French pneg_ctxt->Name[14] = 0xCD; 63238c8a9a5SSteve French pneg_ctxt->Name[15] = 0x7C; 63338c8a9a5SSteve French } 63438c8a9a5SSteve French 63538c8a9a5SSteve French static void 63638c8a9a5SSteve French assemble_neg_contexts(struct smb2_negotiate_req *req, 63738c8a9a5SSteve French struct TCP_Server_Info *server, unsigned int *total_len) 63838c8a9a5SSteve French { 63938c8a9a5SSteve French unsigned int ctxt_len, neg_context_count; 64038c8a9a5SSteve French struct TCP_Server_Info *pserver; 64138c8a9a5SSteve French char *pneg_ctxt; 64238c8a9a5SSteve French char *hostname; 64338c8a9a5SSteve French 64438c8a9a5SSteve French if (*total_len > 200) { 64538c8a9a5SSteve French /* In case length corrupted don't want to overrun smb buffer */ 64638c8a9a5SSteve French cifs_server_dbg(VFS, "Bad frame length assembling neg contexts\n"); 64738c8a9a5SSteve French return; 64838c8a9a5SSteve French } 64938c8a9a5SSteve French 65038c8a9a5SSteve French /* 65138c8a9a5SSteve French * round up total_len of fixed part of SMB3 negotiate request to 8 65238c8a9a5SSteve French * byte boundary before adding negotiate contexts 65338c8a9a5SSteve French */ 65438c8a9a5SSteve French *total_len = ALIGN(*total_len, 8); 65538c8a9a5SSteve French 65638c8a9a5SSteve French pneg_ctxt = (*total_len) + (char *)req; 65738c8a9a5SSteve French req->NegotiateContextOffset = cpu_to_le32(*total_len); 65838c8a9a5SSteve French 65938c8a9a5SSteve French build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt); 66038c8a9a5SSteve French ctxt_len = ALIGN(sizeof(struct smb2_preauth_neg_context), 8); 66138c8a9a5SSteve French *total_len += ctxt_len; 66238c8a9a5SSteve French pneg_ctxt += ctxt_len; 66338c8a9a5SSteve French 66438c8a9a5SSteve French build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt); 66538c8a9a5SSteve French ctxt_len = ALIGN(sizeof(struct smb2_encryption_neg_context), 8); 66638c8a9a5SSteve French *total_len += ctxt_len; 66738c8a9a5SSteve French pneg_ctxt += ctxt_len; 66838c8a9a5SSteve French 66938c8a9a5SSteve French /* 67038c8a9a5SSteve French * secondary channels don't have the hostname field populated 67138c8a9a5SSteve French * use the hostname field in the primary channel instead 67238c8a9a5SSteve French */ 673b3773b19SSteve French pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 67438c8a9a5SSteve French cifs_server_lock(pserver); 67538c8a9a5SSteve French hostname = pserver->hostname; 67638c8a9a5SSteve French if (hostname && (hostname[0] != 0)) { 67738c8a9a5SSteve French ctxt_len = build_netname_ctxt((struct smb2_netname_neg_context *)pneg_ctxt, 67838c8a9a5SSteve French hostname); 67938c8a9a5SSteve French *total_len += ctxt_len; 68038c8a9a5SSteve French pneg_ctxt += ctxt_len; 68138c8a9a5SSteve French neg_context_count = 3; 68238c8a9a5SSteve French } else 68338c8a9a5SSteve French neg_context_count = 2; 68438c8a9a5SSteve French cifs_server_unlock(pserver); 68538c8a9a5SSteve French 68638c8a9a5SSteve French build_posix_ctxt((struct smb2_posix_neg_context *)pneg_ctxt); 68738c8a9a5SSteve French *total_len += sizeof(struct smb2_posix_neg_context); 68838c8a9a5SSteve French pneg_ctxt += sizeof(struct smb2_posix_neg_context); 68938c8a9a5SSteve French neg_context_count++; 69038c8a9a5SSteve French 69138c8a9a5SSteve French if (server->compress_algorithm) { 69238c8a9a5SSteve French build_compression_ctxt((struct smb2_compression_capabilities_context *) 69338c8a9a5SSteve French pneg_ctxt); 69438c8a9a5SSteve French ctxt_len = ALIGN(sizeof(struct smb2_compression_capabilities_context), 8); 69538c8a9a5SSteve French *total_len += ctxt_len; 69638c8a9a5SSteve French pneg_ctxt += ctxt_len; 69738c8a9a5SSteve French neg_context_count++; 69838c8a9a5SSteve French } 69938c8a9a5SSteve French 70038c8a9a5SSteve French if (enable_negotiate_signing) { 70138c8a9a5SSteve French ctxt_len = build_signing_ctxt((struct smb2_signing_capabilities *) 70238c8a9a5SSteve French pneg_ctxt); 70338c8a9a5SSteve French *total_len += ctxt_len; 70438c8a9a5SSteve French pneg_ctxt += ctxt_len; 70538c8a9a5SSteve French neg_context_count++; 70638c8a9a5SSteve French } 70738c8a9a5SSteve French 70838c8a9a5SSteve French /* check for and add transport_capabilities and signing capabilities */ 70938c8a9a5SSteve French req->NegotiateContextCount = cpu_to_le16(neg_context_count); 71038c8a9a5SSteve French 71138c8a9a5SSteve French } 71238c8a9a5SSteve French 71338c8a9a5SSteve French /* If invalid preauth context warn but use what we requested, SHA-512 */ 71438c8a9a5SSteve French static void decode_preauth_context(struct smb2_preauth_neg_context *ctxt) 71538c8a9a5SSteve French { 71638c8a9a5SSteve French unsigned int len = le16_to_cpu(ctxt->DataLength); 71738c8a9a5SSteve French 71838c8a9a5SSteve French /* 71938c8a9a5SSteve French * Caller checked that DataLength remains within SMB boundary. We still 72038c8a9a5SSteve French * need to confirm that one HashAlgorithms member is accounted for. 72138c8a9a5SSteve French */ 72238c8a9a5SSteve French if (len < MIN_PREAUTH_CTXT_DATA_LEN) { 72338c8a9a5SSteve French pr_warn_once("server sent bad preauth context\n"); 72438c8a9a5SSteve French return; 72538c8a9a5SSteve French } else if (len < MIN_PREAUTH_CTXT_DATA_LEN + le16_to_cpu(ctxt->SaltLength)) { 72638c8a9a5SSteve French pr_warn_once("server sent invalid SaltLength\n"); 72738c8a9a5SSteve French return; 72838c8a9a5SSteve French } 72938c8a9a5SSteve French if (le16_to_cpu(ctxt->HashAlgorithmCount) != 1) 73038c8a9a5SSteve French pr_warn_once("Invalid SMB3 hash algorithm count\n"); 73138c8a9a5SSteve French if (ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512) 73238c8a9a5SSteve French pr_warn_once("unknown SMB3 hash algorithm\n"); 73338c8a9a5SSteve French } 73438c8a9a5SSteve French 73538c8a9a5SSteve French static void decode_compress_ctx(struct TCP_Server_Info *server, 73638c8a9a5SSteve French struct smb2_compression_capabilities_context *ctxt) 73738c8a9a5SSteve French { 73838c8a9a5SSteve French unsigned int len = le16_to_cpu(ctxt->DataLength); 73938c8a9a5SSteve French 74038c8a9a5SSteve French /* 74138c8a9a5SSteve French * Caller checked that DataLength remains within SMB boundary. We still 74238c8a9a5SSteve French * need to confirm that one CompressionAlgorithms member is accounted 74338c8a9a5SSteve French * for. 74438c8a9a5SSteve French */ 74538c8a9a5SSteve French if (len < 10) { 74638c8a9a5SSteve French pr_warn_once("server sent bad compression cntxt\n"); 74738c8a9a5SSteve French return; 74838c8a9a5SSteve French } 74938c8a9a5SSteve French if (le16_to_cpu(ctxt->CompressionAlgorithmCount) != 1) { 75038c8a9a5SSteve French pr_warn_once("Invalid SMB3 compress algorithm count\n"); 75138c8a9a5SSteve French return; 75238c8a9a5SSteve French } 75338c8a9a5SSteve French if (le16_to_cpu(ctxt->CompressionAlgorithms[0]) > 3) { 75438c8a9a5SSteve French pr_warn_once("unknown compression algorithm\n"); 75538c8a9a5SSteve French return; 75638c8a9a5SSteve French } 75738c8a9a5SSteve French server->compress_algorithm = ctxt->CompressionAlgorithms[0]; 75838c8a9a5SSteve French } 75938c8a9a5SSteve French 76038c8a9a5SSteve French static int decode_encrypt_ctx(struct TCP_Server_Info *server, 76138c8a9a5SSteve French struct smb2_encryption_neg_context *ctxt) 76238c8a9a5SSteve French { 76338c8a9a5SSteve French unsigned int len = le16_to_cpu(ctxt->DataLength); 76438c8a9a5SSteve French 76538c8a9a5SSteve French cifs_dbg(FYI, "decode SMB3.11 encryption neg context of len %d\n", len); 76638c8a9a5SSteve French /* 76738c8a9a5SSteve French * Caller checked that DataLength remains within SMB boundary. We still 76838c8a9a5SSteve French * need to confirm that one Cipher flexible array member is accounted 76938c8a9a5SSteve French * for. 77038c8a9a5SSteve French */ 77138c8a9a5SSteve French if (len < MIN_ENCRYPT_CTXT_DATA_LEN) { 77238c8a9a5SSteve French pr_warn_once("server sent bad crypto ctxt len\n"); 77338c8a9a5SSteve French return -EINVAL; 77438c8a9a5SSteve French } 77538c8a9a5SSteve French 77638c8a9a5SSteve French if (le16_to_cpu(ctxt->CipherCount) != 1) { 77738c8a9a5SSteve French pr_warn_once("Invalid SMB3.11 cipher count\n"); 77838c8a9a5SSteve French return -EINVAL; 77938c8a9a5SSteve French } 78038c8a9a5SSteve French cifs_dbg(FYI, "SMB311 cipher type:%d\n", le16_to_cpu(ctxt->Ciphers[0])); 78138c8a9a5SSteve French if (require_gcm_256) { 78238c8a9a5SSteve French if (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES256_GCM) { 78338c8a9a5SSteve French cifs_dbg(VFS, "Server does not support requested encryption type (AES256 GCM)\n"); 78438c8a9a5SSteve French return -EOPNOTSUPP; 78538c8a9a5SSteve French } 78638c8a9a5SSteve French } else if (ctxt->Ciphers[0] == 0) { 78738c8a9a5SSteve French /* 78838c8a9a5SSteve French * e.g. if server only supported AES256_CCM (very unlikely) 78938c8a9a5SSteve French * or server supported no encryption types or had all disabled. 79038c8a9a5SSteve French * Since GLOBAL_CAP_ENCRYPTION will be not set, in the case 79138c8a9a5SSteve French * in which mount requested encryption ("seal") checks later 79238c8a9a5SSteve French * on during tree connection will return proper rc, but if 79338c8a9a5SSteve French * seal not requested by client, since server is allowed to 79438c8a9a5SSteve French * return 0 to indicate no supported cipher, we can't fail here 79538c8a9a5SSteve French */ 79638c8a9a5SSteve French server->cipher_type = 0; 79738c8a9a5SSteve French server->capabilities &= ~SMB2_GLOBAL_CAP_ENCRYPTION; 79838c8a9a5SSteve French pr_warn_once("Server does not support requested encryption types\n"); 79938c8a9a5SSteve French return 0; 80038c8a9a5SSteve French } else if ((ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_CCM) && 80138c8a9a5SSteve French (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_GCM) && 80238c8a9a5SSteve French (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES256_GCM)) { 80338c8a9a5SSteve French /* server returned a cipher we didn't ask for */ 80438c8a9a5SSteve French pr_warn_once("Invalid SMB3.11 cipher returned\n"); 80538c8a9a5SSteve French return -EINVAL; 80638c8a9a5SSteve French } 80738c8a9a5SSteve French server->cipher_type = ctxt->Ciphers[0]; 80838c8a9a5SSteve French server->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION; 80938c8a9a5SSteve French return 0; 81038c8a9a5SSteve French } 81138c8a9a5SSteve French 81238c8a9a5SSteve French static void decode_signing_ctx(struct TCP_Server_Info *server, 81338c8a9a5SSteve French struct smb2_signing_capabilities *pctxt) 81438c8a9a5SSteve French { 81538c8a9a5SSteve French unsigned int len = le16_to_cpu(pctxt->DataLength); 81638c8a9a5SSteve French 81738c8a9a5SSteve French /* 81838c8a9a5SSteve French * Caller checked that DataLength remains within SMB boundary. We still 81938c8a9a5SSteve French * need to confirm that one SigningAlgorithms flexible array member is 82038c8a9a5SSteve French * accounted for. 82138c8a9a5SSteve French */ 82238c8a9a5SSteve French if ((len < 4) || (len > 16)) { 82338c8a9a5SSteve French pr_warn_once("server sent bad signing negcontext\n"); 82438c8a9a5SSteve French return; 82538c8a9a5SSteve French } 82638c8a9a5SSteve French if (le16_to_cpu(pctxt->SigningAlgorithmCount) != 1) { 82738c8a9a5SSteve French pr_warn_once("Invalid signing algorithm count\n"); 82838c8a9a5SSteve French return; 82938c8a9a5SSteve French } 83038c8a9a5SSteve French if (le16_to_cpu(pctxt->SigningAlgorithms[0]) > 2) { 83138c8a9a5SSteve French pr_warn_once("unknown signing algorithm\n"); 83238c8a9a5SSteve French return; 83338c8a9a5SSteve French } 83438c8a9a5SSteve French 83538c8a9a5SSteve French server->signing_negotiated = true; 83638c8a9a5SSteve French server->signing_algorithm = le16_to_cpu(pctxt->SigningAlgorithms[0]); 83738c8a9a5SSteve French cifs_dbg(FYI, "signing algorithm %d chosen\n", 83838c8a9a5SSteve French server->signing_algorithm); 83938c8a9a5SSteve French } 84038c8a9a5SSteve French 84138c8a9a5SSteve French 84238c8a9a5SSteve French static int smb311_decode_neg_context(struct smb2_negotiate_rsp *rsp, 84338c8a9a5SSteve French struct TCP_Server_Info *server, 84438c8a9a5SSteve French unsigned int len_of_smb) 84538c8a9a5SSteve French { 84638c8a9a5SSteve French struct smb2_neg_context *pctx; 84738c8a9a5SSteve French unsigned int offset = le32_to_cpu(rsp->NegotiateContextOffset); 84838c8a9a5SSteve French unsigned int ctxt_cnt = le16_to_cpu(rsp->NegotiateContextCount); 84938c8a9a5SSteve French unsigned int len_of_ctxts, i; 85038c8a9a5SSteve French int rc = 0; 85138c8a9a5SSteve French 85238c8a9a5SSteve French cifs_dbg(FYI, "decoding %d negotiate contexts\n", ctxt_cnt); 85338c8a9a5SSteve French if (len_of_smb <= offset) { 85438c8a9a5SSteve French cifs_server_dbg(VFS, "Invalid response: negotiate context offset\n"); 85538c8a9a5SSteve French return -EINVAL; 85638c8a9a5SSteve French } 85738c8a9a5SSteve French 85838c8a9a5SSteve French len_of_ctxts = len_of_smb - offset; 85938c8a9a5SSteve French 86038c8a9a5SSteve French for (i = 0; i < ctxt_cnt; i++) { 86138c8a9a5SSteve French int clen; 86238c8a9a5SSteve French /* check that offset is not beyond end of SMB */ 86338c8a9a5SSteve French if (len_of_ctxts < sizeof(struct smb2_neg_context)) 86438c8a9a5SSteve French break; 86538c8a9a5SSteve French 86638c8a9a5SSteve French pctx = (struct smb2_neg_context *)(offset + (char *)rsp); 86738c8a9a5SSteve French clen = sizeof(struct smb2_neg_context) 86838c8a9a5SSteve French + le16_to_cpu(pctx->DataLength); 86938c8a9a5SSteve French /* 87038c8a9a5SSteve French * 2.2.4 SMB2 NEGOTIATE Response 87138c8a9a5SSteve French * Subsequent negotiate contexts MUST appear at the first 8-byte 87238c8a9a5SSteve French * aligned offset following the previous negotiate context. 87338c8a9a5SSteve French */ 87438c8a9a5SSteve French if (i + 1 != ctxt_cnt) 87538c8a9a5SSteve French clen = ALIGN(clen, 8); 87638c8a9a5SSteve French if (clen > len_of_ctxts) 87738c8a9a5SSteve French break; 87838c8a9a5SSteve French 87938c8a9a5SSteve French if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) 88038c8a9a5SSteve French decode_preauth_context( 88138c8a9a5SSteve French (struct smb2_preauth_neg_context *)pctx); 88238c8a9a5SSteve French else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) 88338c8a9a5SSteve French rc = decode_encrypt_ctx(server, 88438c8a9a5SSteve French (struct smb2_encryption_neg_context *)pctx); 88538c8a9a5SSteve French else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) 88638c8a9a5SSteve French decode_compress_ctx(server, 88738c8a9a5SSteve French (struct smb2_compression_capabilities_context *)pctx); 88838c8a9a5SSteve French else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) 88938c8a9a5SSteve French server->posix_ext_supported = true; 89038c8a9a5SSteve French else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) 89138c8a9a5SSteve French decode_signing_ctx(server, 89238c8a9a5SSteve French (struct smb2_signing_capabilities *)pctx); 89338c8a9a5SSteve French else 89438c8a9a5SSteve French cifs_server_dbg(VFS, "unknown negcontext of type %d ignored\n", 89538c8a9a5SSteve French le16_to_cpu(pctx->ContextType)); 89638c8a9a5SSteve French if (rc) 89738c8a9a5SSteve French break; 89838c8a9a5SSteve French 89938c8a9a5SSteve French offset += clen; 90038c8a9a5SSteve French len_of_ctxts -= clen; 90138c8a9a5SSteve French } 90238c8a9a5SSteve French return rc; 90338c8a9a5SSteve French } 90438c8a9a5SSteve French 90538c8a9a5SSteve French static struct create_posix * 90638c8a9a5SSteve French create_posix_buf(umode_t mode) 90738c8a9a5SSteve French { 90838c8a9a5SSteve French struct create_posix *buf; 90938c8a9a5SSteve French 91038c8a9a5SSteve French buf = kzalloc(sizeof(struct create_posix), 91138c8a9a5SSteve French GFP_KERNEL); 91238c8a9a5SSteve French if (!buf) 91338c8a9a5SSteve French return NULL; 91438c8a9a5SSteve French 91538c8a9a5SSteve French buf->ccontext.DataOffset = 91638c8a9a5SSteve French cpu_to_le16(offsetof(struct create_posix, Mode)); 91738c8a9a5SSteve French buf->ccontext.DataLength = cpu_to_le32(4); 91838c8a9a5SSteve French buf->ccontext.NameOffset = 91938c8a9a5SSteve French cpu_to_le16(offsetof(struct create_posix, Name)); 92038c8a9a5SSteve French buf->ccontext.NameLength = cpu_to_le16(16); 92138c8a9a5SSteve French 92238c8a9a5SSteve French /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */ 92338c8a9a5SSteve French buf->Name[0] = 0x93; 92438c8a9a5SSteve French buf->Name[1] = 0xAD; 92538c8a9a5SSteve French buf->Name[2] = 0x25; 92638c8a9a5SSteve French buf->Name[3] = 0x50; 92738c8a9a5SSteve French buf->Name[4] = 0x9C; 92838c8a9a5SSteve French buf->Name[5] = 0xB4; 92938c8a9a5SSteve French buf->Name[6] = 0x11; 93038c8a9a5SSteve French buf->Name[7] = 0xE7; 93138c8a9a5SSteve French buf->Name[8] = 0xB4; 93238c8a9a5SSteve French buf->Name[9] = 0x23; 93338c8a9a5SSteve French buf->Name[10] = 0x83; 93438c8a9a5SSteve French buf->Name[11] = 0xDE; 93538c8a9a5SSteve French buf->Name[12] = 0x96; 93638c8a9a5SSteve French buf->Name[13] = 0x8B; 93738c8a9a5SSteve French buf->Name[14] = 0xCD; 93838c8a9a5SSteve French buf->Name[15] = 0x7C; 93938c8a9a5SSteve French buf->Mode = cpu_to_le32(mode); 94038c8a9a5SSteve French cifs_dbg(FYI, "mode on posix create 0%o\n", mode); 94138c8a9a5SSteve French return buf; 94238c8a9a5SSteve French } 94338c8a9a5SSteve French 94438c8a9a5SSteve French static int 94538c8a9a5SSteve French add_posix_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode) 94638c8a9a5SSteve French { 94738c8a9a5SSteve French unsigned int num = *num_iovec; 94838c8a9a5SSteve French 94938c8a9a5SSteve French iov[num].iov_base = create_posix_buf(mode); 95038c8a9a5SSteve French if (mode == ACL_NO_MODE) 951c8ebf077SSteve French cifs_dbg(FYI, "%s: no mode\n", __func__); 95238c8a9a5SSteve French if (iov[num].iov_base == NULL) 95338c8a9a5SSteve French return -ENOMEM; 95438c8a9a5SSteve French iov[num].iov_len = sizeof(struct create_posix); 95538c8a9a5SSteve French *num_iovec = num + 1; 95638c8a9a5SSteve French return 0; 95738c8a9a5SSteve French } 95838c8a9a5SSteve French 95938c8a9a5SSteve French 96038c8a9a5SSteve French /* 96138c8a9a5SSteve French * 96238c8a9a5SSteve French * SMB2 Worker functions follow: 96338c8a9a5SSteve French * 96438c8a9a5SSteve French * The general structure of the worker functions is: 96538c8a9a5SSteve French * 1) Call smb2_init (assembles SMB2 header) 96638c8a9a5SSteve French * 2) Initialize SMB2 command specific fields in fixed length area of SMB 96738c8a9a5SSteve French * 3) Call smb_sendrcv2 (sends request on socket and waits for response) 96838c8a9a5SSteve French * 4) Decode SMB2 command specific fields in the fixed length area 96938c8a9a5SSteve French * 5) Decode variable length data area (if any for this SMB2 command type) 97038c8a9a5SSteve French * 6) Call free smb buffer 97138c8a9a5SSteve French * 7) return 97238c8a9a5SSteve French * 97338c8a9a5SSteve French */ 97438c8a9a5SSteve French 97538c8a9a5SSteve French int 97638c8a9a5SSteve French SMB2_negotiate(const unsigned int xid, 97738c8a9a5SSteve French struct cifs_ses *ses, 97838c8a9a5SSteve French struct TCP_Server_Info *server) 97938c8a9a5SSteve French { 98038c8a9a5SSteve French struct smb_rqst rqst; 98138c8a9a5SSteve French struct smb2_negotiate_req *req; 98238c8a9a5SSteve French struct smb2_negotiate_rsp *rsp; 98338c8a9a5SSteve French struct kvec iov[1]; 98438c8a9a5SSteve French struct kvec rsp_iov; 98538c8a9a5SSteve French int rc; 98638c8a9a5SSteve French int resp_buftype; 98738c8a9a5SSteve French int blob_offset, blob_length; 98838c8a9a5SSteve French char *security_blob; 98938c8a9a5SSteve French int flags = CIFS_NEG_OP; 99038c8a9a5SSteve French unsigned int total_len; 99138c8a9a5SSteve French 99238c8a9a5SSteve French cifs_dbg(FYI, "Negotiate protocol\n"); 99338c8a9a5SSteve French 99438c8a9a5SSteve French if (!server) { 99538c8a9a5SSteve French WARN(1, "%s: server is NULL!\n", __func__); 99638c8a9a5SSteve French return -EIO; 99738c8a9a5SSteve French } 99838c8a9a5SSteve French 99938c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_NEGOTIATE, NULL, server, 100038c8a9a5SSteve French (void **) &req, &total_len); 100138c8a9a5SSteve French if (rc) 100238c8a9a5SSteve French return rc; 100338c8a9a5SSteve French 100438c8a9a5SSteve French req->hdr.SessionId = 0; 100538c8a9a5SSteve French 100638c8a9a5SSteve French memset(server->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE); 100738c8a9a5SSteve French memset(ses->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE); 100838c8a9a5SSteve French 100938c8a9a5SSteve French if (strcmp(server->vals->version_string, 101038c8a9a5SSteve French SMB3ANY_VERSION_STRING) == 0) { 101138c8a9a5SSteve French req->Dialects[0] = cpu_to_le16(SMB30_PROT_ID); 101238c8a9a5SSteve French req->Dialects[1] = cpu_to_le16(SMB302_PROT_ID); 101338c8a9a5SSteve French req->Dialects[2] = cpu_to_le16(SMB311_PROT_ID); 101438c8a9a5SSteve French req->DialectCount = cpu_to_le16(3); 101538c8a9a5SSteve French total_len += 6; 101638c8a9a5SSteve French } else if (strcmp(server->vals->version_string, 101738c8a9a5SSteve French SMBDEFAULT_VERSION_STRING) == 0) { 101838c8a9a5SSteve French req->Dialects[0] = cpu_to_le16(SMB21_PROT_ID); 101938c8a9a5SSteve French req->Dialects[1] = cpu_to_le16(SMB30_PROT_ID); 102038c8a9a5SSteve French req->Dialects[2] = cpu_to_le16(SMB302_PROT_ID); 102138c8a9a5SSteve French req->Dialects[3] = cpu_to_le16(SMB311_PROT_ID); 102238c8a9a5SSteve French req->DialectCount = cpu_to_le16(4); 102338c8a9a5SSteve French total_len += 8; 102438c8a9a5SSteve French } else { 102538c8a9a5SSteve French /* otherwise send specific dialect */ 102638c8a9a5SSteve French req->Dialects[0] = cpu_to_le16(server->vals->protocol_id); 102738c8a9a5SSteve French req->DialectCount = cpu_to_le16(1); 102838c8a9a5SSteve French total_len += 2; 102938c8a9a5SSteve French } 103038c8a9a5SSteve French 103138c8a9a5SSteve French /* only one of SMB2 signing flags may be set in SMB2 request */ 103238c8a9a5SSteve French if (ses->sign) 103338c8a9a5SSteve French req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED); 103438c8a9a5SSteve French else if (global_secflags & CIFSSEC_MAY_SIGN) 103538c8a9a5SSteve French req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED); 103638c8a9a5SSteve French else 103738c8a9a5SSteve French req->SecurityMode = 0; 103838c8a9a5SSteve French 103938c8a9a5SSteve French req->Capabilities = cpu_to_le32(server->vals->req_capabilities); 104038c8a9a5SSteve French if (ses->chan_max > 1) 104138c8a9a5SSteve French req->Capabilities |= cpu_to_le32(SMB2_GLOBAL_CAP_MULTI_CHANNEL); 104238c8a9a5SSteve French 104338c8a9a5SSteve French /* ClientGUID must be zero for SMB2.02 dialect */ 104438c8a9a5SSteve French if (server->vals->protocol_id == SMB20_PROT_ID) 104538c8a9a5SSteve French memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE); 104638c8a9a5SSteve French else { 104738c8a9a5SSteve French memcpy(req->ClientGUID, server->client_guid, 104838c8a9a5SSteve French SMB2_CLIENT_GUID_SIZE); 104938c8a9a5SSteve French if ((server->vals->protocol_id == SMB311_PROT_ID) || 105038c8a9a5SSteve French (strcmp(server->vals->version_string, 105138c8a9a5SSteve French SMB3ANY_VERSION_STRING) == 0) || 105238c8a9a5SSteve French (strcmp(server->vals->version_string, 105338c8a9a5SSteve French SMBDEFAULT_VERSION_STRING) == 0)) 105438c8a9a5SSteve French assemble_neg_contexts(req, server, &total_len); 105538c8a9a5SSteve French } 105638c8a9a5SSteve French iov[0].iov_base = (char *)req; 105738c8a9a5SSteve French iov[0].iov_len = total_len; 105838c8a9a5SSteve French 105938c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 106038c8a9a5SSteve French rqst.rq_iov = iov; 106138c8a9a5SSteve French rqst.rq_nvec = 1; 106238c8a9a5SSteve French 106338c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 106438c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 106538c8a9a5SSteve French cifs_small_buf_release(req); 106638c8a9a5SSteve French rsp = (struct smb2_negotiate_rsp *)rsp_iov.iov_base; 106738c8a9a5SSteve French /* 106838c8a9a5SSteve French * No tcon so can't do 106938c8a9a5SSteve French * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); 107038c8a9a5SSteve French */ 107138c8a9a5SSteve French if (rc == -EOPNOTSUPP) { 107238c8a9a5SSteve 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"); 107338c8a9a5SSteve French goto neg_exit; 107438c8a9a5SSteve French } else if (rc != 0) 107538c8a9a5SSteve French goto neg_exit; 107638c8a9a5SSteve French 107738c8a9a5SSteve French rc = -EIO; 107838c8a9a5SSteve French if (strcmp(server->vals->version_string, 107938c8a9a5SSteve French SMB3ANY_VERSION_STRING) == 0) { 108038c8a9a5SSteve French if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) { 108138c8a9a5SSteve French cifs_server_dbg(VFS, 108238c8a9a5SSteve French "SMB2 dialect returned but not requested\n"); 108338c8a9a5SSteve French goto neg_exit; 108438c8a9a5SSteve French } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) { 108538c8a9a5SSteve French cifs_server_dbg(VFS, 108638c8a9a5SSteve French "SMB2.1 dialect returned but not requested\n"); 108738c8a9a5SSteve French goto neg_exit; 108838c8a9a5SSteve French } else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) { 108938c8a9a5SSteve French /* ops set to 3.0 by default for default so update */ 109038c8a9a5SSteve French server->ops = &smb311_operations; 109138c8a9a5SSteve French server->vals = &smb311_values; 109238c8a9a5SSteve French } 109338c8a9a5SSteve French } else if (strcmp(server->vals->version_string, 109438c8a9a5SSteve French SMBDEFAULT_VERSION_STRING) == 0) { 109538c8a9a5SSteve French if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) { 109638c8a9a5SSteve French cifs_server_dbg(VFS, 109738c8a9a5SSteve French "SMB2 dialect returned but not requested\n"); 109838c8a9a5SSteve French goto neg_exit; 109938c8a9a5SSteve French } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) { 110038c8a9a5SSteve French /* ops set to 3.0 by default for default so update */ 110138c8a9a5SSteve French server->ops = &smb21_operations; 110238c8a9a5SSteve French server->vals = &smb21_values; 110338c8a9a5SSteve French } else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) { 110438c8a9a5SSteve French server->ops = &smb311_operations; 110538c8a9a5SSteve French server->vals = &smb311_values; 110638c8a9a5SSteve French } 110738c8a9a5SSteve French } else if (le16_to_cpu(rsp->DialectRevision) != 110838c8a9a5SSteve French server->vals->protocol_id) { 110938c8a9a5SSteve French /* if requested single dialect ensure returned dialect matched */ 111038c8a9a5SSteve French cifs_server_dbg(VFS, "Invalid 0x%x dialect returned: not requested\n", 111138c8a9a5SSteve French le16_to_cpu(rsp->DialectRevision)); 111238c8a9a5SSteve French goto neg_exit; 111338c8a9a5SSteve French } 111438c8a9a5SSteve French 111538c8a9a5SSteve French cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode); 111638c8a9a5SSteve French 111738c8a9a5SSteve French if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) 111838c8a9a5SSteve French cifs_dbg(FYI, "negotiated smb2.0 dialect\n"); 111938c8a9a5SSteve French else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) 112038c8a9a5SSteve French cifs_dbg(FYI, "negotiated smb2.1 dialect\n"); 112138c8a9a5SSteve French else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID)) 112238c8a9a5SSteve French cifs_dbg(FYI, "negotiated smb3.0 dialect\n"); 112338c8a9a5SSteve French else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID)) 112438c8a9a5SSteve French cifs_dbg(FYI, "negotiated smb3.02 dialect\n"); 112538c8a9a5SSteve French else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) 112638c8a9a5SSteve French cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n"); 112738c8a9a5SSteve French else { 112838c8a9a5SSteve French cifs_server_dbg(VFS, "Invalid dialect returned by server 0x%x\n", 112938c8a9a5SSteve French le16_to_cpu(rsp->DialectRevision)); 113038c8a9a5SSteve French goto neg_exit; 113138c8a9a5SSteve French } 113238c8a9a5SSteve French 113338c8a9a5SSteve French rc = 0; 113438c8a9a5SSteve French server->dialect = le16_to_cpu(rsp->DialectRevision); 113538c8a9a5SSteve French 113638c8a9a5SSteve French /* 113738c8a9a5SSteve French * Keep a copy of the hash after negprot. This hash will be 113838c8a9a5SSteve French * the starting hash value for all sessions made from this 113938c8a9a5SSteve French * server. 114038c8a9a5SSteve French */ 114138c8a9a5SSteve French memcpy(server->preauth_sha_hash, ses->preauth_sha_hash, 114238c8a9a5SSteve French SMB2_PREAUTH_HASH_SIZE); 114338c8a9a5SSteve French 114438c8a9a5SSteve French /* SMB2 only has an extended negflavor */ 114538c8a9a5SSteve French server->negflavor = CIFS_NEGFLAVOR_EXTENDED; 114638c8a9a5SSteve French /* set it to the maximum buffer size value we can send with 1 credit */ 114738c8a9a5SSteve French server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize), 114838c8a9a5SSteve French SMB2_MAX_BUFFER_SIZE); 114938c8a9a5SSteve French server->max_read = le32_to_cpu(rsp->MaxReadSize); 115038c8a9a5SSteve French server->max_write = le32_to_cpu(rsp->MaxWriteSize); 115138c8a9a5SSteve French server->sec_mode = le16_to_cpu(rsp->SecurityMode); 115238c8a9a5SSteve French if ((server->sec_mode & SMB2_SEC_MODE_FLAGS_ALL) != server->sec_mode) 115338c8a9a5SSteve French cifs_dbg(FYI, "Server returned unexpected security mode 0x%x\n", 115438c8a9a5SSteve French server->sec_mode); 115538c8a9a5SSteve French server->capabilities = le32_to_cpu(rsp->Capabilities); 115638c8a9a5SSteve French /* Internal types */ 115738c8a9a5SSteve French server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES; 115838c8a9a5SSteve French 115938c8a9a5SSteve French /* 116038c8a9a5SSteve French * SMB3.0 supports only 1 cipher and doesn't have a encryption neg context 116138c8a9a5SSteve French * Set the cipher type manually. 116238c8a9a5SSteve French */ 116338c8a9a5SSteve French if (server->dialect == SMB30_PROT_ID && (server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION)) 116438c8a9a5SSteve French server->cipher_type = SMB2_ENCRYPTION_AES128_CCM; 116538c8a9a5SSteve French 116638c8a9a5SSteve French security_blob = smb2_get_data_area_len(&blob_offset, &blob_length, 116738c8a9a5SSteve French (struct smb2_hdr *)rsp); 116838c8a9a5SSteve French /* 116938c8a9a5SSteve French * See MS-SMB2 section 2.2.4: if no blob, client picks default which 117038c8a9a5SSteve French * for us will be 117138c8a9a5SSteve French * ses->sectype = RawNTLMSSP; 117238c8a9a5SSteve French * but for time being this is our only auth choice so doesn't matter. 117338c8a9a5SSteve French * We just found a server which sets blob length to zero expecting raw. 117438c8a9a5SSteve French */ 117538c8a9a5SSteve French if (blob_length == 0) { 117638c8a9a5SSteve French cifs_dbg(FYI, "missing security blob on negprot\n"); 117738c8a9a5SSteve French server->sec_ntlmssp = true; 117838c8a9a5SSteve French } 117938c8a9a5SSteve French 118038c8a9a5SSteve French rc = cifs_enable_signing(server, ses->sign); 118138c8a9a5SSteve French if (rc) 118238c8a9a5SSteve French goto neg_exit; 118338c8a9a5SSteve French if (blob_length) { 118438c8a9a5SSteve French rc = decode_negTokenInit(security_blob, blob_length, server); 118538c8a9a5SSteve French if (rc == 1) 118638c8a9a5SSteve French rc = 0; 118738c8a9a5SSteve French else if (rc == 0) 118838c8a9a5SSteve French rc = -EIO; 118938c8a9a5SSteve French } 119038c8a9a5SSteve French 119138c8a9a5SSteve French if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) { 119238c8a9a5SSteve French if (rsp->NegotiateContextCount) 119338c8a9a5SSteve French rc = smb311_decode_neg_context(rsp, server, 119438c8a9a5SSteve French rsp_iov.iov_len); 119538c8a9a5SSteve French else 119638c8a9a5SSteve French cifs_server_dbg(VFS, "Missing expected negotiate contexts\n"); 119738c8a9a5SSteve French } 119838c8a9a5SSteve French neg_exit: 119938c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp); 120038c8a9a5SSteve French return rc; 120138c8a9a5SSteve French } 120238c8a9a5SSteve French 120338c8a9a5SSteve French int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon) 120438c8a9a5SSteve French { 120538c8a9a5SSteve French int rc; 120638c8a9a5SSteve French struct validate_negotiate_info_req *pneg_inbuf; 120738c8a9a5SSteve French struct validate_negotiate_info_rsp *pneg_rsp = NULL; 120838c8a9a5SSteve French u32 rsplen; 120938c8a9a5SSteve French u32 inbuflen; /* max of 4 dialects */ 121038c8a9a5SSteve French struct TCP_Server_Info *server = tcon->ses->server; 121138c8a9a5SSteve French 121238c8a9a5SSteve French cifs_dbg(FYI, "validate negotiate\n"); 121338c8a9a5SSteve French 121438c8a9a5SSteve French /* In SMB3.11 preauth integrity supersedes validate negotiate */ 121538c8a9a5SSteve French if (server->dialect == SMB311_PROT_ID) 121638c8a9a5SSteve French return 0; 121738c8a9a5SSteve French 121838c8a9a5SSteve French /* 121938c8a9a5SSteve French * validation ioctl must be signed, so no point sending this if we 122038c8a9a5SSteve French * can not sign it (ie are not known user). Even if signing is not 122138c8a9a5SSteve French * required (enabled but not negotiated), in those cases we selectively 122238c8a9a5SSteve French * sign just this, the first and only signed request on a connection. 122338c8a9a5SSteve French * Having validation of negotiate info helps reduce attack vectors. 122438c8a9a5SSteve French */ 122538c8a9a5SSteve French if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) 122638c8a9a5SSteve French return 0; /* validation requires signing */ 122738c8a9a5SSteve French 122838c8a9a5SSteve French if (tcon->ses->user_name == NULL) { 122938c8a9a5SSteve French cifs_dbg(FYI, "Can't validate negotiate: null user mount\n"); 123038c8a9a5SSteve French return 0; /* validation requires signing */ 123138c8a9a5SSteve French } 123238c8a9a5SSteve French 123338c8a9a5SSteve French if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_NULL) 123438c8a9a5SSteve French cifs_tcon_dbg(VFS, "Unexpected null user (anonymous) auth flag sent by server\n"); 123538c8a9a5SSteve French 123638c8a9a5SSteve French pneg_inbuf = kmalloc(sizeof(*pneg_inbuf), GFP_NOFS); 123738c8a9a5SSteve French if (!pneg_inbuf) 123838c8a9a5SSteve French return -ENOMEM; 123938c8a9a5SSteve French 124038c8a9a5SSteve French pneg_inbuf->Capabilities = 124138c8a9a5SSteve French cpu_to_le32(server->vals->req_capabilities); 124238c8a9a5SSteve French if (tcon->ses->chan_max > 1) 124338c8a9a5SSteve French pneg_inbuf->Capabilities |= cpu_to_le32(SMB2_GLOBAL_CAP_MULTI_CHANNEL); 124438c8a9a5SSteve French 124538c8a9a5SSteve French memcpy(pneg_inbuf->Guid, server->client_guid, 124638c8a9a5SSteve French SMB2_CLIENT_GUID_SIZE); 124738c8a9a5SSteve French 124838c8a9a5SSteve French if (tcon->ses->sign) 124938c8a9a5SSteve French pneg_inbuf->SecurityMode = 125038c8a9a5SSteve French cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED); 125138c8a9a5SSteve French else if (global_secflags & CIFSSEC_MAY_SIGN) 125238c8a9a5SSteve French pneg_inbuf->SecurityMode = 125338c8a9a5SSteve French cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED); 125438c8a9a5SSteve French else 125538c8a9a5SSteve French pneg_inbuf->SecurityMode = 0; 125638c8a9a5SSteve French 125738c8a9a5SSteve French 125838c8a9a5SSteve French if (strcmp(server->vals->version_string, 125938c8a9a5SSteve French SMB3ANY_VERSION_STRING) == 0) { 126038c8a9a5SSteve French pneg_inbuf->Dialects[0] = cpu_to_le16(SMB30_PROT_ID); 126138c8a9a5SSteve French pneg_inbuf->Dialects[1] = cpu_to_le16(SMB302_PROT_ID); 126238c8a9a5SSteve French pneg_inbuf->Dialects[2] = cpu_to_le16(SMB311_PROT_ID); 126338c8a9a5SSteve French pneg_inbuf->DialectCount = cpu_to_le16(3); 126438c8a9a5SSteve French /* SMB 2.1 not included so subtract one dialect from len */ 126538c8a9a5SSteve French inbuflen = sizeof(*pneg_inbuf) - 126638c8a9a5SSteve French (sizeof(pneg_inbuf->Dialects[0])); 126738c8a9a5SSteve French } else if (strcmp(server->vals->version_string, 126838c8a9a5SSteve French SMBDEFAULT_VERSION_STRING) == 0) { 126938c8a9a5SSteve French pneg_inbuf->Dialects[0] = cpu_to_le16(SMB21_PROT_ID); 127038c8a9a5SSteve French pneg_inbuf->Dialects[1] = cpu_to_le16(SMB30_PROT_ID); 127138c8a9a5SSteve French pneg_inbuf->Dialects[2] = cpu_to_le16(SMB302_PROT_ID); 127238c8a9a5SSteve French pneg_inbuf->Dialects[3] = cpu_to_le16(SMB311_PROT_ID); 127338c8a9a5SSteve French pneg_inbuf->DialectCount = cpu_to_le16(4); 127438c8a9a5SSteve French /* structure is big enough for 4 dialects */ 127538c8a9a5SSteve French inbuflen = sizeof(*pneg_inbuf); 127638c8a9a5SSteve French } else { 127738c8a9a5SSteve French /* otherwise specific dialect was requested */ 127838c8a9a5SSteve French pneg_inbuf->Dialects[0] = 127938c8a9a5SSteve French cpu_to_le16(server->vals->protocol_id); 128038c8a9a5SSteve French pneg_inbuf->DialectCount = cpu_to_le16(1); 128138c8a9a5SSteve French /* structure is big enough for 4 dialects, sending only 1 */ 128238c8a9a5SSteve French inbuflen = sizeof(*pneg_inbuf) - 128338c8a9a5SSteve French sizeof(pneg_inbuf->Dialects[0]) * 3; 128438c8a9a5SSteve French } 128538c8a9a5SSteve French 128638c8a9a5SSteve French rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 128738c8a9a5SSteve French FSCTL_VALIDATE_NEGOTIATE_INFO, 128838c8a9a5SSteve French (char *)pneg_inbuf, inbuflen, CIFSMaxBufSize, 128938c8a9a5SSteve French (char **)&pneg_rsp, &rsplen); 129038c8a9a5SSteve French if (rc == -EOPNOTSUPP) { 129138c8a9a5SSteve French /* 129238c8a9a5SSteve French * Old Windows versions or Netapp SMB server can return 129338c8a9a5SSteve French * not supported error. Client should accept it. 129438c8a9a5SSteve French */ 129538c8a9a5SSteve French cifs_tcon_dbg(VFS, "Server does not support validate negotiate\n"); 129638c8a9a5SSteve French rc = 0; 129738c8a9a5SSteve French goto out_free_inbuf; 129838c8a9a5SSteve French } else if (rc != 0) { 129938c8a9a5SSteve French cifs_tcon_dbg(VFS, "validate protocol negotiate failed: %d\n", 130038c8a9a5SSteve French rc); 130138c8a9a5SSteve French rc = -EIO; 130238c8a9a5SSteve French goto out_free_inbuf; 130338c8a9a5SSteve French } 130438c8a9a5SSteve French 130538c8a9a5SSteve French rc = -EIO; 130638c8a9a5SSteve French if (rsplen != sizeof(*pneg_rsp)) { 130738c8a9a5SSteve French cifs_tcon_dbg(VFS, "Invalid protocol negotiate response size: %d\n", 130838c8a9a5SSteve French rsplen); 130938c8a9a5SSteve French 131038c8a9a5SSteve French /* relax check since Mac returns max bufsize allowed on ioctl */ 131138c8a9a5SSteve French if (rsplen > CIFSMaxBufSize || rsplen < sizeof(*pneg_rsp)) 131238c8a9a5SSteve French goto out_free_rsp; 131338c8a9a5SSteve French } 131438c8a9a5SSteve French 131538c8a9a5SSteve French /* check validate negotiate info response matches what we got earlier */ 131638c8a9a5SSteve French if (pneg_rsp->Dialect != cpu_to_le16(server->dialect)) 131738c8a9a5SSteve French goto vneg_out; 131838c8a9a5SSteve French 131938c8a9a5SSteve French if (pneg_rsp->SecurityMode != cpu_to_le16(server->sec_mode)) 132038c8a9a5SSteve French goto vneg_out; 132138c8a9a5SSteve French 132238c8a9a5SSteve French /* do not validate server guid because not saved at negprot time yet */ 132338c8a9a5SSteve French 132438c8a9a5SSteve French if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND | 132538c8a9a5SSteve French SMB2_LARGE_FILES) != server->capabilities) 132638c8a9a5SSteve French goto vneg_out; 132738c8a9a5SSteve French 132838c8a9a5SSteve French /* validate negotiate successful */ 132938c8a9a5SSteve French rc = 0; 133038c8a9a5SSteve French cifs_dbg(FYI, "validate negotiate info successful\n"); 133138c8a9a5SSteve French goto out_free_rsp; 133238c8a9a5SSteve French 133338c8a9a5SSteve French vneg_out: 133438c8a9a5SSteve French cifs_tcon_dbg(VFS, "protocol revalidation - security settings mismatch\n"); 133538c8a9a5SSteve French out_free_rsp: 133638c8a9a5SSteve French kfree(pneg_rsp); 133738c8a9a5SSteve French out_free_inbuf: 133838c8a9a5SSteve French kfree(pneg_inbuf); 133938c8a9a5SSteve French return rc; 134038c8a9a5SSteve French } 134138c8a9a5SSteve French 134238c8a9a5SSteve French enum securityEnum 134338c8a9a5SSteve French smb2_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested) 134438c8a9a5SSteve French { 134538c8a9a5SSteve French switch (requested) { 134638c8a9a5SSteve French case Kerberos: 134738c8a9a5SSteve French case RawNTLMSSP: 134838c8a9a5SSteve French return requested; 134938c8a9a5SSteve French case NTLMv2: 135038c8a9a5SSteve French return RawNTLMSSP; 135138c8a9a5SSteve French case Unspecified: 135238c8a9a5SSteve French if (server->sec_ntlmssp && 135338c8a9a5SSteve French (global_secflags & CIFSSEC_MAY_NTLMSSP)) 135438c8a9a5SSteve French return RawNTLMSSP; 135538c8a9a5SSteve French if ((server->sec_kerberos || server->sec_mskerberos) && 135638c8a9a5SSteve French (global_secflags & CIFSSEC_MAY_KRB5)) 135738c8a9a5SSteve French return Kerberos; 135838c8a9a5SSteve French fallthrough; 135938c8a9a5SSteve French default: 136038c8a9a5SSteve French return Unspecified; 136138c8a9a5SSteve French } 136238c8a9a5SSteve French } 136338c8a9a5SSteve French 136438c8a9a5SSteve French struct SMB2_sess_data { 136538c8a9a5SSteve French unsigned int xid; 136638c8a9a5SSteve French struct cifs_ses *ses; 136738c8a9a5SSteve French struct TCP_Server_Info *server; 136838c8a9a5SSteve French struct nls_table *nls_cp; 136938c8a9a5SSteve French void (*func)(struct SMB2_sess_data *); 137038c8a9a5SSteve French int result; 137138c8a9a5SSteve French u64 previous_session; 137238c8a9a5SSteve French 137338c8a9a5SSteve French /* we will send the SMB in three pieces: 137438c8a9a5SSteve French * a fixed length beginning part, an optional 137538c8a9a5SSteve French * SPNEGO blob (which can be zero length), and a 137638c8a9a5SSteve French * last part which will include the strings 137738c8a9a5SSteve French * and rest of bcc area. This allows us to avoid 137838c8a9a5SSteve French * a large buffer 17K allocation 137938c8a9a5SSteve French */ 138038c8a9a5SSteve French int buf0_type; 138138c8a9a5SSteve French struct kvec iov[2]; 138238c8a9a5SSteve French }; 138338c8a9a5SSteve French 138438c8a9a5SSteve French static int 138538c8a9a5SSteve French SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data) 138638c8a9a5SSteve French { 138738c8a9a5SSteve French int rc; 138838c8a9a5SSteve French struct cifs_ses *ses = sess_data->ses; 138938c8a9a5SSteve French struct TCP_Server_Info *server = sess_data->server; 139038c8a9a5SSteve French struct smb2_sess_setup_req *req; 139138c8a9a5SSteve French unsigned int total_len; 139238c8a9a5SSteve French bool is_binding = false; 139338c8a9a5SSteve French 139438c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_SESSION_SETUP, NULL, server, 139538c8a9a5SSteve French (void **) &req, 139638c8a9a5SSteve French &total_len); 139738c8a9a5SSteve French if (rc) 139838c8a9a5SSteve French return rc; 139938c8a9a5SSteve French 140038c8a9a5SSteve French spin_lock(&ses->ses_lock); 140138c8a9a5SSteve French is_binding = (ses->ses_status == SES_GOOD); 140238c8a9a5SSteve French spin_unlock(&ses->ses_lock); 140338c8a9a5SSteve French 140438c8a9a5SSteve French if (is_binding) { 140538c8a9a5SSteve French req->hdr.SessionId = cpu_to_le64(ses->Suid); 140638c8a9a5SSteve French req->hdr.Flags |= SMB2_FLAGS_SIGNED; 140738c8a9a5SSteve French req->PreviousSessionId = 0; 140838c8a9a5SSteve French req->Flags = SMB2_SESSION_REQ_FLAG_BINDING; 140938c8a9a5SSteve French cifs_dbg(FYI, "Binding to sess id: %llx\n", ses->Suid); 141038c8a9a5SSteve French } else { 141138c8a9a5SSteve French /* First session, not a reauthenticate */ 141238c8a9a5SSteve French req->hdr.SessionId = 0; 141338c8a9a5SSteve French /* 141438c8a9a5SSteve French * if reconnect, we need to send previous sess id 141538c8a9a5SSteve French * otherwise it is 0 141638c8a9a5SSteve French */ 141738c8a9a5SSteve French req->PreviousSessionId = cpu_to_le64(sess_data->previous_session); 141838c8a9a5SSteve French req->Flags = 0; /* MBZ */ 141938c8a9a5SSteve French cifs_dbg(FYI, "Fresh session. Previous: %llx\n", 142038c8a9a5SSteve French sess_data->previous_session); 142138c8a9a5SSteve French } 142238c8a9a5SSteve French 142338c8a9a5SSteve French /* enough to enable echos and oplocks and one max size write */ 14245e90aa21SShyam Prasad N if (server->credits >= server->max_credits) 14255e90aa21SShyam Prasad N req->hdr.CreditRequest = cpu_to_le16(0); 14265e90aa21SShyam Prasad N else 14275e90aa21SShyam Prasad N req->hdr.CreditRequest = cpu_to_le16( 14285e90aa21SShyam Prasad N min_t(int, server->max_credits - 14295e90aa21SShyam Prasad N server->credits, 130)); 143038c8a9a5SSteve French 143138c8a9a5SSteve French /* only one of SMB2 signing flags may be set in SMB2 request */ 143238c8a9a5SSteve French if (server->sign) 143338c8a9a5SSteve French req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED; 143438c8a9a5SSteve French else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */ 143538c8a9a5SSteve French req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED; 143638c8a9a5SSteve French else 143738c8a9a5SSteve French req->SecurityMode = 0; 143838c8a9a5SSteve French 143938c8a9a5SSteve French #ifdef CONFIG_CIFS_DFS_UPCALL 144038c8a9a5SSteve French req->Capabilities = cpu_to_le32(SMB2_GLOBAL_CAP_DFS); 144138c8a9a5SSteve French #else 144238c8a9a5SSteve French req->Capabilities = 0; 144338c8a9a5SSteve French #endif /* DFS_UPCALL */ 144438c8a9a5SSteve French 144538c8a9a5SSteve French req->Channel = 0; /* MBZ */ 144638c8a9a5SSteve French 144738c8a9a5SSteve French sess_data->iov[0].iov_base = (char *)req; 144838c8a9a5SSteve French /* 1 for pad */ 144938c8a9a5SSteve French sess_data->iov[0].iov_len = total_len - 1; 145038c8a9a5SSteve French /* 145138c8a9a5SSteve French * This variable will be used to clear the buffer 145238c8a9a5SSteve French * allocated above in case of any error in the calling function. 145338c8a9a5SSteve French */ 145438c8a9a5SSteve French sess_data->buf0_type = CIFS_SMALL_BUFFER; 145538c8a9a5SSteve French 145638c8a9a5SSteve French return 0; 145738c8a9a5SSteve French } 145838c8a9a5SSteve French 145938c8a9a5SSteve French static void 146038c8a9a5SSteve French SMB2_sess_free_buffer(struct SMB2_sess_data *sess_data) 146138c8a9a5SSteve French { 146238c8a9a5SSteve French struct kvec *iov = sess_data->iov; 146338c8a9a5SSteve French 146438c8a9a5SSteve French /* iov[1] is already freed by caller */ 146538c8a9a5SSteve French if (sess_data->buf0_type != CIFS_NO_BUFFER && iov[0].iov_base) 146638c8a9a5SSteve French memzero_explicit(iov[0].iov_base, iov[0].iov_len); 146738c8a9a5SSteve French 146838c8a9a5SSteve French free_rsp_buf(sess_data->buf0_type, iov[0].iov_base); 146938c8a9a5SSteve French sess_data->buf0_type = CIFS_NO_BUFFER; 147038c8a9a5SSteve French } 147138c8a9a5SSteve French 147238c8a9a5SSteve French static int 147338c8a9a5SSteve French SMB2_sess_sendreceive(struct SMB2_sess_data *sess_data) 147438c8a9a5SSteve French { 147538c8a9a5SSteve French int rc; 147638c8a9a5SSteve French struct smb_rqst rqst; 147738c8a9a5SSteve French struct smb2_sess_setup_req *req = sess_data->iov[0].iov_base; 147838c8a9a5SSteve French struct kvec rsp_iov = { NULL, 0 }; 147938c8a9a5SSteve French 148038c8a9a5SSteve French /* Testing shows that buffer offset must be at location of Buffer[0] */ 148138c8a9a5SSteve French req->SecurityBufferOffset = 148238c8a9a5SSteve French cpu_to_le16(sizeof(struct smb2_sess_setup_req)); 148338c8a9a5SSteve French req->SecurityBufferLength = cpu_to_le16(sess_data->iov[1].iov_len); 148438c8a9a5SSteve French 148538c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 148638c8a9a5SSteve French rqst.rq_iov = sess_data->iov; 148738c8a9a5SSteve French rqst.rq_nvec = 2; 148838c8a9a5SSteve French 148938c8a9a5SSteve French /* BB add code to build os and lm fields */ 149038c8a9a5SSteve French rc = cifs_send_recv(sess_data->xid, sess_data->ses, 149138c8a9a5SSteve French sess_data->server, 149238c8a9a5SSteve French &rqst, 149338c8a9a5SSteve French &sess_data->buf0_type, 149438c8a9a5SSteve French CIFS_LOG_ERROR | CIFS_SESS_OP, &rsp_iov); 149538c8a9a5SSteve French cifs_small_buf_release(sess_data->iov[0].iov_base); 149638c8a9a5SSteve French memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec)); 149738c8a9a5SSteve French 149838c8a9a5SSteve French return rc; 149938c8a9a5SSteve French } 150038c8a9a5SSteve French 150138c8a9a5SSteve French static int 150238c8a9a5SSteve French SMB2_sess_establish_session(struct SMB2_sess_data *sess_data) 150338c8a9a5SSteve French { 150438c8a9a5SSteve French int rc = 0; 150538c8a9a5SSteve French struct cifs_ses *ses = sess_data->ses; 150638c8a9a5SSteve French struct TCP_Server_Info *server = sess_data->server; 150738c8a9a5SSteve French 150838c8a9a5SSteve French cifs_server_lock(server); 150938c8a9a5SSteve French if (server->ops->generate_signingkey) { 151038c8a9a5SSteve French rc = server->ops->generate_signingkey(ses, server); 151138c8a9a5SSteve French if (rc) { 151238c8a9a5SSteve French cifs_dbg(FYI, 151338c8a9a5SSteve French "SMB3 session key generation failed\n"); 151438c8a9a5SSteve French cifs_server_unlock(server); 151538c8a9a5SSteve French return rc; 151638c8a9a5SSteve French } 151738c8a9a5SSteve French } 151838c8a9a5SSteve French if (!server->session_estab) { 151938c8a9a5SSteve French server->sequence_number = 0x2; 152038c8a9a5SSteve French server->session_estab = true; 152138c8a9a5SSteve French } 152238c8a9a5SSteve French cifs_server_unlock(server); 152338c8a9a5SSteve French 152438c8a9a5SSteve French cifs_dbg(FYI, "SMB2/3 session established successfully\n"); 152538c8a9a5SSteve French return rc; 152638c8a9a5SSteve French } 152738c8a9a5SSteve French 152838c8a9a5SSteve French #ifdef CONFIG_CIFS_UPCALL 152938c8a9a5SSteve French static void 153038c8a9a5SSteve French SMB2_auth_kerberos(struct SMB2_sess_data *sess_data) 153138c8a9a5SSteve French { 153238c8a9a5SSteve French int rc; 153338c8a9a5SSteve French struct cifs_ses *ses = sess_data->ses; 153438c8a9a5SSteve French struct TCP_Server_Info *server = sess_data->server; 153538c8a9a5SSteve French struct cifs_spnego_msg *msg; 153638c8a9a5SSteve French struct key *spnego_key = NULL; 153738c8a9a5SSteve French struct smb2_sess_setup_rsp *rsp = NULL; 153838c8a9a5SSteve French bool is_binding = false; 153938c8a9a5SSteve French 154038c8a9a5SSteve French rc = SMB2_sess_alloc_buffer(sess_data); 154138c8a9a5SSteve French if (rc) 154238c8a9a5SSteve French goto out; 154338c8a9a5SSteve French 154438c8a9a5SSteve French spnego_key = cifs_get_spnego_key(ses, server); 154538c8a9a5SSteve French if (IS_ERR(spnego_key)) { 154638c8a9a5SSteve French rc = PTR_ERR(spnego_key); 154738c8a9a5SSteve French if (rc == -ENOKEY) 154838c8a9a5SSteve French cifs_dbg(VFS, "Verify user has a krb5 ticket and keyutils is installed\n"); 154938c8a9a5SSteve French spnego_key = NULL; 155038c8a9a5SSteve French goto out; 155138c8a9a5SSteve French } 155238c8a9a5SSteve French 155338c8a9a5SSteve French msg = spnego_key->payload.data[0]; 155438c8a9a5SSteve French /* 155538c8a9a5SSteve French * check version field to make sure that cifs.upcall is 155638c8a9a5SSteve French * sending us a response in an expected form 155738c8a9a5SSteve French */ 155838c8a9a5SSteve French if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) { 155938c8a9a5SSteve French cifs_dbg(VFS, "bad cifs.upcall version. Expected %d got %d\n", 156038c8a9a5SSteve French CIFS_SPNEGO_UPCALL_VERSION, msg->version); 156138c8a9a5SSteve French rc = -EKEYREJECTED; 156238c8a9a5SSteve French goto out_put_spnego_key; 156338c8a9a5SSteve French } 156438c8a9a5SSteve French 156538c8a9a5SSteve French spin_lock(&ses->ses_lock); 156638c8a9a5SSteve French is_binding = (ses->ses_status == SES_GOOD); 156738c8a9a5SSteve French spin_unlock(&ses->ses_lock); 156838c8a9a5SSteve French 156938c8a9a5SSteve French /* keep session key if binding */ 157038c8a9a5SSteve French if (!is_binding) { 157138c8a9a5SSteve French kfree_sensitive(ses->auth_key.response); 157238c8a9a5SSteve French ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len, 157338c8a9a5SSteve French GFP_KERNEL); 157438c8a9a5SSteve French if (!ses->auth_key.response) { 157538c8a9a5SSteve French cifs_dbg(VFS, "Kerberos can't allocate (%u bytes) memory\n", 157638c8a9a5SSteve French msg->sesskey_len); 157738c8a9a5SSteve French rc = -ENOMEM; 157838c8a9a5SSteve French goto out_put_spnego_key; 157938c8a9a5SSteve French } 158038c8a9a5SSteve French ses->auth_key.len = msg->sesskey_len; 158138c8a9a5SSteve French } 158238c8a9a5SSteve French 158338c8a9a5SSteve French sess_data->iov[1].iov_base = msg->data + msg->sesskey_len; 158438c8a9a5SSteve French sess_data->iov[1].iov_len = msg->secblob_len; 158538c8a9a5SSteve French 158638c8a9a5SSteve French rc = SMB2_sess_sendreceive(sess_data); 158738c8a9a5SSteve French if (rc) 158838c8a9a5SSteve French goto out_put_spnego_key; 158938c8a9a5SSteve French 159038c8a9a5SSteve French rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base; 159138c8a9a5SSteve French /* keep session id and flags if binding */ 159238c8a9a5SSteve French if (!is_binding) { 159338c8a9a5SSteve French ses->Suid = le64_to_cpu(rsp->hdr.SessionId); 159438c8a9a5SSteve French ses->session_flags = le16_to_cpu(rsp->SessionFlags); 159538c8a9a5SSteve French } 159638c8a9a5SSteve French 159738c8a9a5SSteve French rc = SMB2_sess_establish_session(sess_data); 159838c8a9a5SSteve French out_put_spnego_key: 159938c8a9a5SSteve French key_invalidate(spnego_key); 160038c8a9a5SSteve French key_put(spnego_key); 160138c8a9a5SSteve French if (rc) { 160238c8a9a5SSteve French kfree_sensitive(ses->auth_key.response); 160338c8a9a5SSteve French ses->auth_key.response = NULL; 160438c8a9a5SSteve French ses->auth_key.len = 0; 160538c8a9a5SSteve French } 160638c8a9a5SSteve French out: 160738c8a9a5SSteve French sess_data->result = rc; 160838c8a9a5SSteve French sess_data->func = NULL; 160938c8a9a5SSteve French SMB2_sess_free_buffer(sess_data); 161038c8a9a5SSteve French } 161138c8a9a5SSteve French #else 161238c8a9a5SSteve French static void 161338c8a9a5SSteve French SMB2_auth_kerberos(struct SMB2_sess_data *sess_data) 161438c8a9a5SSteve French { 161538c8a9a5SSteve French cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n"); 161638c8a9a5SSteve French sess_data->result = -EOPNOTSUPP; 161738c8a9a5SSteve French sess_data->func = NULL; 161838c8a9a5SSteve French } 161938c8a9a5SSteve French #endif 162038c8a9a5SSteve French 162138c8a9a5SSteve French static void 162238c8a9a5SSteve French SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data); 162338c8a9a5SSteve French 162438c8a9a5SSteve French static void 162538c8a9a5SSteve French SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data) 162638c8a9a5SSteve French { 162738c8a9a5SSteve French int rc; 162838c8a9a5SSteve French struct cifs_ses *ses = sess_data->ses; 162938c8a9a5SSteve French struct TCP_Server_Info *server = sess_data->server; 163038c8a9a5SSteve French struct smb2_sess_setup_rsp *rsp = NULL; 163138c8a9a5SSteve French unsigned char *ntlmssp_blob = NULL; 163238c8a9a5SSteve French bool use_spnego = false; /* else use raw ntlmssp */ 163338c8a9a5SSteve French u16 blob_length = 0; 163438c8a9a5SSteve French bool is_binding = false; 163538c8a9a5SSteve French 163638c8a9a5SSteve French /* 163738c8a9a5SSteve French * If memory allocation is successful, caller of this function 163838c8a9a5SSteve French * frees it. 163938c8a9a5SSteve French */ 164038c8a9a5SSteve French ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL); 164138c8a9a5SSteve French if (!ses->ntlmssp) { 164238c8a9a5SSteve French rc = -ENOMEM; 164338c8a9a5SSteve French goto out_err; 164438c8a9a5SSteve French } 164538c8a9a5SSteve French ses->ntlmssp->sesskey_per_smbsess = true; 164638c8a9a5SSteve French 164738c8a9a5SSteve French rc = SMB2_sess_alloc_buffer(sess_data); 164838c8a9a5SSteve French if (rc) 164938c8a9a5SSteve French goto out_err; 165038c8a9a5SSteve French 165138c8a9a5SSteve French rc = build_ntlmssp_smb3_negotiate_blob(&ntlmssp_blob, 165238c8a9a5SSteve French &blob_length, ses, server, 165338c8a9a5SSteve French sess_data->nls_cp); 165438c8a9a5SSteve French if (rc) 165538c8a9a5SSteve French goto out; 165638c8a9a5SSteve French 165738c8a9a5SSteve French if (use_spnego) { 165838c8a9a5SSteve French /* BB eventually need to add this */ 165938c8a9a5SSteve French cifs_dbg(VFS, "spnego not supported for SMB2 yet\n"); 166038c8a9a5SSteve French rc = -EOPNOTSUPP; 166138c8a9a5SSteve French goto out; 166238c8a9a5SSteve French } 166338c8a9a5SSteve French sess_data->iov[1].iov_base = ntlmssp_blob; 166438c8a9a5SSteve French sess_data->iov[1].iov_len = blob_length; 166538c8a9a5SSteve French 166638c8a9a5SSteve French rc = SMB2_sess_sendreceive(sess_data); 166738c8a9a5SSteve French rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base; 166838c8a9a5SSteve French 166938c8a9a5SSteve French /* If true, rc here is expected and not an error */ 167038c8a9a5SSteve French if (sess_data->buf0_type != CIFS_NO_BUFFER && 167138c8a9a5SSteve French rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) 167238c8a9a5SSteve French rc = 0; 167338c8a9a5SSteve French 167438c8a9a5SSteve French if (rc) 167538c8a9a5SSteve French goto out; 167638c8a9a5SSteve French 167738c8a9a5SSteve French if (offsetof(struct smb2_sess_setup_rsp, Buffer) != 167838c8a9a5SSteve French le16_to_cpu(rsp->SecurityBufferOffset)) { 167938c8a9a5SSteve French cifs_dbg(VFS, "Invalid security buffer offset %d\n", 168038c8a9a5SSteve French le16_to_cpu(rsp->SecurityBufferOffset)); 168138c8a9a5SSteve French rc = -EIO; 168238c8a9a5SSteve French goto out; 168338c8a9a5SSteve French } 168438c8a9a5SSteve French rc = decode_ntlmssp_challenge(rsp->Buffer, 168538c8a9a5SSteve French le16_to_cpu(rsp->SecurityBufferLength), ses); 168638c8a9a5SSteve French if (rc) 168738c8a9a5SSteve French goto out; 168838c8a9a5SSteve French 168938c8a9a5SSteve French cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n"); 169038c8a9a5SSteve French 169138c8a9a5SSteve French spin_lock(&ses->ses_lock); 169238c8a9a5SSteve French is_binding = (ses->ses_status == SES_GOOD); 169338c8a9a5SSteve French spin_unlock(&ses->ses_lock); 169438c8a9a5SSteve French 169538c8a9a5SSteve French /* keep existing ses id and flags if binding */ 169638c8a9a5SSteve French if (!is_binding) { 169738c8a9a5SSteve French ses->Suid = le64_to_cpu(rsp->hdr.SessionId); 169838c8a9a5SSteve French ses->session_flags = le16_to_cpu(rsp->SessionFlags); 169938c8a9a5SSteve French } 170038c8a9a5SSteve French 170138c8a9a5SSteve French out: 170238c8a9a5SSteve French kfree_sensitive(ntlmssp_blob); 170338c8a9a5SSteve French SMB2_sess_free_buffer(sess_data); 170438c8a9a5SSteve French if (!rc) { 170538c8a9a5SSteve French sess_data->result = 0; 170638c8a9a5SSteve French sess_data->func = SMB2_sess_auth_rawntlmssp_authenticate; 170738c8a9a5SSteve French return; 170838c8a9a5SSteve French } 170938c8a9a5SSteve French out_err: 171038c8a9a5SSteve French kfree_sensitive(ses->ntlmssp); 171138c8a9a5SSteve French ses->ntlmssp = NULL; 171238c8a9a5SSteve French sess_data->result = rc; 171338c8a9a5SSteve French sess_data->func = NULL; 171438c8a9a5SSteve French } 171538c8a9a5SSteve French 171638c8a9a5SSteve French static void 171738c8a9a5SSteve French SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data) 171838c8a9a5SSteve French { 171938c8a9a5SSteve French int rc; 172038c8a9a5SSteve French struct cifs_ses *ses = sess_data->ses; 172138c8a9a5SSteve French struct TCP_Server_Info *server = sess_data->server; 172238c8a9a5SSteve French struct smb2_sess_setup_req *req; 172338c8a9a5SSteve French struct smb2_sess_setup_rsp *rsp = NULL; 172438c8a9a5SSteve French unsigned char *ntlmssp_blob = NULL; 172538c8a9a5SSteve French bool use_spnego = false; /* else use raw ntlmssp */ 172638c8a9a5SSteve French u16 blob_length = 0; 172738c8a9a5SSteve French bool is_binding = false; 172838c8a9a5SSteve French 172938c8a9a5SSteve French rc = SMB2_sess_alloc_buffer(sess_data); 173038c8a9a5SSteve French if (rc) 173138c8a9a5SSteve French goto out; 173238c8a9a5SSteve French 173338c8a9a5SSteve French req = (struct smb2_sess_setup_req *) sess_data->iov[0].iov_base; 173438c8a9a5SSteve French req->hdr.SessionId = cpu_to_le64(ses->Suid); 173538c8a9a5SSteve French 173638c8a9a5SSteve French rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, 173738c8a9a5SSteve French ses, server, 173838c8a9a5SSteve French sess_data->nls_cp); 173938c8a9a5SSteve French if (rc) { 174038c8a9a5SSteve French cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", rc); 174138c8a9a5SSteve French goto out; 174238c8a9a5SSteve French } 174338c8a9a5SSteve French 174438c8a9a5SSteve French if (use_spnego) { 174538c8a9a5SSteve French /* BB eventually need to add this */ 174638c8a9a5SSteve French cifs_dbg(VFS, "spnego not supported for SMB2 yet\n"); 174738c8a9a5SSteve French rc = -EOPNOTSUPP; 174838c8a9a5SSteve French goto out; 174938c8a9a5SSteve French } 175038c8a9a5SSteve French sess_data->iov[1].iov_base = ntlmssp_blob; 175138c8a9a5SSteve French sess_data->iov[1].iov_len = blob_length; 175238c8a9a5SSteve French 175338c8a9a5SSteve French rc = SMB2_sess_sendreceive(sess_data); 175438c8a9a5SSteve French if (rc) 175538c8a9a5SSteve French goto out; 175638c8a9a5SSteve French 175738c8a9a5SSteve French rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base; 175838c8a9a5SSteve French 175938c8a9a5SSteve French spin_lock(&ses->ses_lock); 176038c8a9a5SSteve French is_binding = (ses->ses_status == SES_GOOD); 176138c8a9a5SSteve French spin_unlock(&ses->ses_lock); 176238c8a9a5SSteve French 176338c8a9a5SSteve French /* keep existing ses id and flags if binding */ 176438c8a9a5SSteve French if (!is_binding) { 176538c8a9a5SSteve French ses->Suid = le64_to_cpu(rsp->hdr.SessionId); 176638c8a9a5SSteve French ses->session_flags = le16_to_cpu(rsp->SessionFlags); 176738c8a9a5SSteve French } 176838c8a9a5SSteve French 176938c8a9a5SSteve French rc = SMB2_sess_establish_session(sess_data); 177038c8a9a5SSteve French #ifdef CONFIG_CIFS_DEBUG_DUMP_KEYS 177138c8a9a5SSteve French if (ses->server->dialect < SMB30_PROT_ID) { 177238c8a9a5SSteve French cifs_dbg(VFS, "%s: dumping generated SMB2 session keys\n", __func__); 177338c8a9a5SSteve French /* 177438c8a9a5SSteve French * The session id is opaque in terms of endianness, so we can't 177538c8a9a5SSteve French * print it as a long long. we dump it as we got it on the wire 177638c8a9a5SSteve French */ 177738c8a9a5SSteve French cifs_dbg(VFS, "Session Id %*ph\n", (int)sizeof(ses->Suid), 177838c8a9a5SSteve French &ses->Suid); 177938c8a9a5SSteve French cifs_dbg(VFS, "Session Key %*ph\n", 178038c8a9a5SSteve French SMB2_NTLMV2_SESSKEY_SIZE, ses->auth_key.response); 178138c8a9a5SSteve French cifs_dbg(VFS, "Signing Key %*ph\n", 178238c8a9a5SSteve French SMB3_SIGN_KEY_SIZE, ses->auth_key.response); 178338c8a9a5SSteve French } 178438c8a9a5SSteve French #endif 178538c8a9a5SSteve French out: 178638c8a9a5SSteve French kfree_sensitive(ntlmssp_blob); 178738c8a9a5SSteve French SMB2_sess_free_buffer(sess_data); 178838c8a9a5SSteve French kfree_sensitive(ses->ntlmssp); 178938c8a9a5SSteve French ses->ntlmssp = NULL; 179038c8a9a5SSteve French sess_data->result = rc; 179138c8a9a5SSteve French sess_data->func = NULL; 179238c8a9a5SSteve French } 179338c8a9a5SSteve French 179438c8a9a5SSteve French static int 179538c8a9a5SSteve French SMB2_select_sec(struct SMB2_sess_data *sess_data) 179638c8a9a5SSteve French { 179738c8a9a5SSteve French int type; 179838c8a9a5SSteve French struct cifs_ses *ses = sess_data->ses; 179938c8a9a5SSteve French struct TCP_Server_Info *server = sess_data->server; 180038c8a9a5SSteve French 180138c8a9a5SSteve French type = smb2_select_sectype(server, ses->sectype); 180238c8a9a5SSteve French cifs_dbg(FYI, "sess setup type %d\n", type); 180338c8a9a5SSteve French if (type == Unspecified) { 180438c8a9a5SSteve French cifs_dbg(VFS, "Unable to select appropriate authentication method!\n"); 180538c8a9a5SSteve French return -EINVAL; 180638c8a9a5SSteve French } 180738c8a9a5SSteve French 180838c8a9a5SSteve French switch (type) { 180938c8a9a5SSteve French case Kerberos: 181038c8a9a5SSteve French sess_data->func = SMB2_auth_kerberos; 181138c8a9a5SSteve French break; 181238c8a9a5SSteve French case RawNTLMSSP: 181338c8a9a5SSteve French sess_data->func = SMB2_sess_auth_rawntlmssp_negotiate; 181438c8a9a5SSteve French break; 181538c8a9a5SSteve French default: 181638c8a9a5SSteve French cifs_dbg(VFS, "secType %d not supported!\n", type); 181738c8a9a5SSteve French return -EOPNOTSUPP; 181838c8a9a5SSteve French } 181938c8a9a5SSteve French 182038c8a9a5SSteve French return 0; 182138c8a9a5SSteve French } 182238c8a9a5SSteve French 182338c8a9a5SSteve French int 182438c8a9a5SSteve French SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses, 182538c8a9a5SSteve French struct TCP_Server_Info *server, 182638c8a9a5SSteve French const struct nls_table *nls_cp) 182738c8a9a5SSteve French { 182838c8a9a5SSteve French int rc = 0; 182938c8a9a5SSteve French struct SMB2_sess_data *sess_data; 183038c8a9a5SSteve French 183138c8a9a5SSteve French cifs_dbg(FYI, "Session Setup\n"); 183238c8a9a5SSteve French 183338c8a9a5SSteve French if (!server) { 183438c8a9a5SSteve French WARN(1, "%s: server is NULL!\n", __func__); 183538c8a9a5SSteve French return -EIO; 183638c8a9a5SSteve French } 183738c8a9a5SSteve French 183838c8a9a5SSteve French sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL); 183938c8a9a5SSteve French if (!sess_data) 184038c8a9a5SSteve French return -ENOMEM; 184138c8a9a5SSteve French 184238c8a9a5SSteve French sess_data->xid = xid; 184338c8a9a5SSteve French sess_data->ses = ses; 184438c8a9a5SSteve French sess_data->server = server; 184538c8a9a5SSteve French sess_data->buf0_type = CIFS_NO_BUFFER; 184638c8a9a5SSteve French sess_data->nls_cp = (struct nls_table *) nls_cp; 184738c8a9a5SSteve French sess_data->previous_session = ses->Suid; 184838c8a9a5SSteve French 184938c8a9a5SSteve French rc = SMB2_select_sec(sess_data); 185038c8a9a5SSteve French if (rc) 185138c8a9a5SSteve French goto out; 185238c8a9a5SSteve French 185338c8a9a5SSteve French /* 185438c8a9a5SSteve French * Initialize the session hash with the server one. 185538c8a9a5SSteve French */ 185638c8a9a5SSteve French memcpy(ses->preauth_sha_hash, server->preauth_sha_hash, 185738c8a9a5SSteve French SMB2_PREAUTH_HASH_SIZE); 185838c8a9a5SSteve French 185938c8a9a5SSteve French while (sess_data->func) 186038c8a9a5SSteve French sess_data->func(sess_data); 186138c8a9a5SSteve French 186238c8a9a5SSteve French if ((ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) && (ses->sign)) 186338c8a9a5SSteve French cifs_server_dbg(VFS, "signing requested but authenticated as guest\n"); 186438c8a9a5SSteve French rc = sess_data->result; 186538c8a9a5SSteve French out: 186638c8a9a5SSteve French kfree_sensitive(sess_data); 186738c8a9a5SSteve French return rc; 186838c8a9a5SSteve French } 186938c8a9a5SSteve French 187038c8a9a5SSteve French int 187138c8a9a5SSteve French SMB2_logoff(const unsigned int xid, struct cifs_ses *ses) 187238c8a9a5SSteve French { 187338c8a9a5SSteve French struct smb_rqst rqst; 187438c8a9a5SSteve French struct smb2_logoff_req *req; /* response is also trivial struct */ 187538c8a9a5SSteve French int rc = 0; 187638c8a9a5SSteve French struct TCP_Server_Info *server; 187738c8a9a5SSteve French int flags = 0; 187838c8a9a5SSteve French unsigned int total_len; 187938c8a9a5SSteve French struct kvec iov[1]; 188038c8a9a5SSteve French struct kvec rsp_iov; 188138c8a9a5SSteve French int resp_buf_type; 188238c8a9a5SSteve French 188338c8a9a5SSteve French cifs_dbg(FYI, "disconnect session %p\n", ses); 188438c8a9a5SSteve French 188538c8a9a5SSteve French if (ses && (ses->server)) 188638c8a9a5SSteve French server = ses->server; 188738c8a9a5SSteve French else 188838c8a9a5SSteve French return -EIO; 188938c8a9a5SSteve French 189038c8a9a5SSteve French /* no need to send SMB logoff if uid already closed due to reconnect */ 189138c8a9a5SSteve French spin_lock(&ses->chan_lock); 189238c8a9a5SSteve French if (CIFS_ALL_CHANS_NEED_RECONNECT(ses)) { 189338c8a9a5SSteve French spin_unlock(&ses->chan_lock); 189438c8a9a5SSteve French goto smb2_session_already_dead; 189538c8a9a5SSteve French } 189638c8a9a5SSteve French spin_unlock(&ses->chan_lock); 189738c8a9a5SSteve French 189838c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_LOGOFF, NULL, ses->server, 189938c8a9a5SSteve French (void **) &req, &total_len); 190038c8a9a5SSteve French if (rc) 190138c8a9a5SSteve French return rc; 190238c8a9a5SSteve French 190338c8a9a5SSteve French /* since no tcon, smb2_init can not do this, so do here */ 190438c8a9a5SSteve French req->hdr.SessionId = cpu_to_le64(ses->Suid); 190538c8a9a5SSteve French 190638c8a9a5SSteve French if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) 190738c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 190838c8a9a5SSteve French else if (server->sign) 190938c8a9a5SSteve French req->hdr.Flags |= SMB2_FLAGS_SIGNED; 191038c8a9a5SSteve French 191138c8a9a5SSteve French flags |= CIFS_NO_RSP_BUF; 191238c8a9a5SSteve French 191338c8a9a5SSteve French iov[0].iov_base = (char *)req; 191438c8a9a5SSteve French iov[0].iov_len = total_len; 191538c8a9a5SSteve French 191638c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 191738c8a9a5SSteve French rqst.rq_iov = iov; 191838c8a9a5SSteve French rqst.rq_nvec = 1; 191938c8a9a5SSteve French 192038c8a9a5SSteve French rc = cifs_send_recv(xid, ses, ses->server, 192138c8a9a5SSteve French &rqst, &resp_buf_type, flags, &rsp_iov); 192238c8a9a5SSteve French cifs_small_buf_release(req); 192338c8a9a5SSteve French /* 192438c8a9a5SSteve French * No tcon so can't do 192538c8a9a5SSteve French * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); 192638c8a9a5SSteve French */ 192738c8a9a5SSteve French 192838c8a9a5SSteve French smb2_session_already_dead: 192938c8a9a5SSteve French return rc; 193038c8a9a5SSteve French } 193138c8a9a5SSteve French 193238c8a9a5SSteve French static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code) 193338c8a9a5SSteve French { 193438c8a9a5SSteve French cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]); 193538c8a9a5SSteve French } 193638c8a9a5SSteve French 193738c8a9a5SSteve French #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */) 193838c8a9a5SSteve French 193938c8a9a5SSteve French /* These are similar values to what Windows uses */ 194038c8a9a5SSteve French static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon) 194138c8a9a5SSteve French { 194238c8a9a5SSteve French tcon->max_chunks = 256; 194338c8a9a5SSteve French tcon->max_bytes_chunk = 1048576; 194438c8a9a5SSteve French tcon->max_bytes_copy = 16777216; 194538c8a9a5SSteve French } 194638c8a9a5SSteve French 194738c8a9a5SSteve French int 194838c8a9a5SSteve French SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree, 194938c8a9a5SSteve French struct cifs_tcon *tcon, const struct nls_table *cp) 195038c8a9a5SSteve French { 195138c8a9a5SSteve French struct smb_rqst rqst; 195238c8a9a5SSteve French struct smb2_tree_connect_req *req; 195338c8a9a5SSteve French struct smb2_tree_connect_rsp *rsp = NULL; 195438c8a9a5SSteve French struct kvec iov[2]; 195538c8a9a5SSteve French struct kvec rsp_iov = { NULL, 0 }; 195638c8a9a5SSteve French int rc = 0; 195738c8a9a5SSteve French int resp_buftype; 195838c8a9a5SSteve French int unc_path_len; 195938c8a9a5SSteve French __le16 *unc_path = NULL; 196038c8a9a5SSteve French int flags = 0; 196138c8a9a5SSteve French unsigned int total_len; 196238c8a9a5SSteve French struct TCP_Server_Info *server; 196338c8a9a5SSteve French 196438c8a9a5SSteve French /* always use master channel */ 196538c8a9a5SSteve French server = ses->server; 196638c8a9a5SSteve French 196738c8a9a5SSteve French cifs_dbg(FYI, "TCON\n"); 196838c8a9a5SSteve French 196938c8a9a5SSteve French if (!server || !tree) 197038c8a9a5SSteve French return -EIO; 197138c8a9a5SSteve French 197238c8a9a5SSteve French unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL); 197338c8a9a5SSteve French if (unc_path == NULL) 197438c8a9a5SSteve French return -ENOMEM; 197538c8a9a5SSteve French 197638c8a9a5SSteve French unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp); 197738c8a9a5SSteve French if (unc_path_len <= 0) { 197838c8a9a5SSteve French kfree(unc_path); 197938c8a9a5SSteve French return -EINVAL; 198038c8a9a5SSteve French } 198138c8a9a5SSteve French unc_path_len *= 2; 198238c8a9a5SSteve French 198338c8a9a5SSteve French /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */ 198438c8a9a5SSteve French tcon->tid = 0; 198538c8a9a5SSteve French atomic_set(&tcon->num_remote_opens, 0); 198638c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_TREE_CONNECT, tcon, server, 198738c8a9a5SSteve French (void **) &req, &total_len); 198838c8a9a5SSteve French if (rc) { 198938c8a9a5SSteve French kfree(unc_path); 199038c8a9a5SSteve French return rc; 199138c8a9a5SSteve French } 199238c8a9a5SSteve French 199338c8a9a5SSteve French if (smb3_encryption_required(tcon)) 199438c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 199538c8a9a5SSteve French 199638c8a9a5SSteve French iov[0].iov_base = (char *)req; 199738c8a9a5SSteve French /* 1 for pad */ 199838c8a9a5SSteve French iov[0].iov_len = total_len - 1; 199938c8a9a5SSteve French 200038c8a9a5SSteve French /* Testing shows that buffer offset must be at location of Buffer[0] */ 200138c8a9a5SSteve French req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)); 200238c8a9a5SSteve French req->PathLength = cpu_to_le16(unc_path_len); 200338c8a9a5SSteve French iov[1].iov_base = unc_path; 200438c8a9a5SSteve French iov[1].iov_len = unc_path_len; 200538c8a9a5SSteve French 200638c8a9a5SSteve French /* 200738c8a9a5SSteve French * 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1 200838c8a9a5SSteve French * unless it is guest or anonymous user. See MS-SMB2 3.2.5.3.1 200938c8a9a5SSteve French * (Samba servers don't always set the flag so also check if null user) 201038c8a9a5SSteve French */ 201138c8a9a5SSteve French if ((server->dialect == SMB311_PROT_ID) && 201238c8a9a5SSteve French !smb3_encryption_required(tcon) && 201338c8a9a5SSteve French !(ses->session_flags & 201438c8a9a5SSteve French (SMB2_SESSION_FLAG_IS_GUEST|SMB2_SESSION_FLAG_IS_NULL)) && 201538c8a9a5SSteve French ((ses->user_name != NULL) || (ses->sectype == Kerberos))) 201638c8a9a5SSteve French req->hdr.Flags |= SMB2_FLAGS_SIGNED; 201738c8a9a5SSteve French 201838c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 201938c8a9a5SSteve French rqst.rq_iov = iov; 202038c8a9a5SSteve French rqst.rq_nvec = 2; 202138c8a9a5SSteve French 202238c8a9a5SSteve French /* Need 64 for max size write so ask for more in case not there yet */ 20235e90aa21SShyam Prasad N if (server->credits >= server->max_credits) 20245e90aa21SShyam Prasad N req->hdr.CreditRequest = cpu_to_le16(0); 20255e90aa21SShyam Prasad N else 20265e90aa21SShyam Prasad N req->hdr.CreditRequest = cpu_to_le16( 20275e90aa21SShyam Prasad N min_t(int, server->max_credits - 20285e90aa21SShyam Prasad N server->credits, 64)); 202938c8a9a5SSteve French 203038c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 203138c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 203238c8a9a5SSteve French cifs_small_buf_release(req); 203338c8a9a5SSteve French rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base; 203438c8a9a5SSteve French trace_smb3_tcon(xid, tcon->tid, ses->Suid, tree, rc); 203538c8a9a5SSteve French if ((rc != 0) || (rsp == NULL)) { 203638c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE); 203738c8a9a5SSteve French tcon->need_reconnect = true; 203838c8a9a5SSteve French goto tcon_error_exit; 203938c8a9a5SSteve French } 204038c8a9a5SSteve French 204138c8a9a5SSteve French switch (rsp->ShareType) { 204238c8a9a5SSteve French case SMB2_SHARE_TYPE_DISK: 204338c8a9a5SSteve French cifs_dbg(FYI, "connection to disk share\n"); 204438c8a9a5SSteve French break; 204538c8a9a5SSteve French case SMB2_SHARE_TYPE_PIPE: 204638c8a9a5SSteve French tcon->pipe = true; 204738c8a9a5SSteve French cifs_dbg(FYI, "connection to pipe share\n"); 204838c8a9a5SSteve French break; 204938c8a9a5SSteve French case SMB2_SHARE_TYPE_PRINT: 205038c8a9a5SSteve French tcon->print = true; 205138c8a9a5SSteve French cifs_dbg(FYI, "connection to printer\n"); 205238c8a9a5SSteve French break; 205338c8a9a5SSteve French default: 205438c8a9a5SSteve French cifs_server_dbg(VFS, "unknown share type %d\n", rsp->ShareType); 205538c8a9a5SSteve French rc = -EOPNOTSUPP; 205638c8a9a5SSteve French goto tcon_error_exit; 205738c8a9a5SSteve French } 205838c8a9a5SSteve French 205938c8a9a5SSteve French tcon->share_flags = le32_to_cpu(rsp->ShareFlags); 206038c8a9a5SSteve French tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */ 206138c8a9a5SSteve French tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess); 206238c8a9a5SSteve French tcon->tid = le32_to_cpu(rsp->hdr.Id.SyncId.TreeId); 206338c8a9a5SSteve French strscpy(tcon->tree_name, tree, sizeof(tcon->tree_name)); 206438c8a9a5SSteve French 206538c8a9a5SSteve French if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) && 206638c8a9a5SSteve French ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0)) 206738c8a9a5SSteve French cifs_tcon_dbg(VFS, "DFS capability contradicts DFS flag\n"); 206838c8a9a5SSteve French 206938c8a9a5SSteve French if (tcon->seal && 207038c8a9a5SSteve French !(server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION)) 207138c8a9a5SSteve French cifs_tcon_dbg(VFS, "Encryption is requested but not supported\n"); 207238c8a9a5SSteve French 207338c8a9a5SSteve French init_copy_chunk_defaults(tcon); 207438c8a9a5SSteve French if (server->ops->validate_negotiate) 207538c8a9a5SSteve French rc = server->ops->validate_negotiate(xid, tcon); 207638c8a9a5SSteve French if (rc == 0) /* See MS-SMB2 2.2.10 and 3.2.5.5 */ 207738c8a9a5SSteve French if (tcon->share_flags & SMB2_SHAREFLAG_ISOLATED_TRANSPORT) 207838c8a9a5SSteve French server->nosharesock = true; 207938c8a9a5SSteve French tcon_exit: 208038c8a9a5SSteve French 208138c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp); 208238c8a9a5SSteve French kfree(unc_path); 208338c8a9a5SSteve French return rc; 208438c8a9a5SSteve French 208538c8a9a5SSteve French tcon_error_exit: 208638c8a9a5SSteve French if (rsp && rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) 208738c8a9a5SSteve French cifs_tcon_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree); 208838c8a9a5SSteve French goto tcon_exit; 208938c8a9a5SSteve French } 209038c8a9a5SSteve French 209138c8a9a5SSteve French int 209238c8a9a5SSteve French SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon) 209338c8a9a5SSteve French { 209438c8a9a5SSteve French struct smb_rqst rqst; 209538c8a9a5SSteve French struct smb2_tree_disconnect_req *req; /* response is trivial */ 209638c8a9a5SSteve French int rc = 0; 209738c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 209838c8a9a5SSteve French int flags = 0; 209938c8a9a5SSteve French unsigned int total_len; 210038c8a9a5SSteve French struct kvec iov[1]; 210138c8a9a5SSteve French struct kvec rsp_iov; 210238c8a9a5SSteve French int resp_buf_type; 210338c8a9a5SSteve French 210438c8a9a5SSteve French cifs_dbg(FYI, "Tree Disconnect\n"); 210538c8a9a5SSteve French 210638c8a9a5SSteve French if (!ses || !(ses->server)) 210738c8a9a5SSteve French return -EIO; 210838c8a9a5SSteve French 210938c8a9a5SSteve French trace_smb3_tdis_enter(xid, tcon->tid, ses->Suid, tcon->tree_name); 211038c8a9a5SSteve French spin_lock(&ses->chan_lock); 211138c8a9a5SSteve French if ((tcon->need_reconnect) || 211238c8a9a5SSteve French (CIFS_ALL_CHANS_NEED_RECONNECT(tcon->ses))) { 211338c8a9a5SSteve French spin_unlock(&ses->chan_lock); 211438c8a9a5SSteve French return 0; 211538c8a9a5SSteve French } 211638c8a9a5SSteve French spin_unlock(&ses->chan_lock); 211738c8a9a5SSteve French 211838c8a9a5SSteve French invalidate_all_cached_dirs(tcon); 211938c8a9a5SSteve French 212038c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_TREE_DISCONNECT, tcon, ses->server, 212138c8a9a5SSteve French (void **) &req, 212238c8a9a5SSteve French &total_len); 212338c8a9a5SSteve French if (rc) 212438c8a9a5SSteve French return rc; 212538c8a9a5SSteve French 212638c8a9a5SSteve French if (smb3_encryption_required(tcon)) 212738c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 212838c8a9a5SSteve French 212938c8a9a5SSteve French flags |= CIFS_NO_RSP_BUF; 213038c8a9a5SSteve French 213138c8a9a5SSteve French iov[0].iov_base = (char *)req; 213238c8a9a5SSteve French iov[0].iov_len = total_len; 213338c8a9a5SSteve French 213438c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 213538c8a9a5SSteve French rqst.rq_iov = iov; 213638c8a9a5SSteve French rqst.rq_nvec = 1; 213738c8a9a5SSteve French 213838c8a9a5SSteve French rc = cifs_send_recv(xid, ses, ses->server, 213938c8a9a5SSteve French &rqst, &resp_buf_type, flags, &rsp_iov); 214038c8a9a5SSteve French cifs_small_buf_release(req); 214138c8a9a5SSteve French if (rc) { 214238c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE); 214338c8a9a5SSteve French trace_smb3_tdis_err(xid, tcon->tid, ses->Suid, rc); 214438c8a9a5SSteve French } 214538c8a9a5SSteve French trace_smb3_tdis_done(xid, tcon->tid, ses->Suid); 214638c8a9a5SSteve French 214738c8a9a5SSteve French return rc; 214838c8a9a5SSteve French } 214938c8a9a5SSteve French 215038c8a9a5SSteve French 215138c8a9a5SSteve French static struct create_durable * 215238c8a9a5SSteve French create_durable_buf(void) 215338c8a9a5SSteve French { 215438c8a9a5SSteve French struct create_durable *buf; 215538c8a9a5SSteve French 215638c8a9a5SSteve French buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL); 215738c8a9a5SSteve French if (!buf) 215838c8a9a5SSteve French return NULL; 215938c8a9a5SSteve French 216038c8a9a5SSteve French buf->ccontext.DataOffset = cpu_to_le16(offsetof 216138c8a9a5SSteve French (struct create_durable, Data)); 216238c8a9a5SSteve French buf->ccontext.DataLength = cpu_to_le32(16); 216338c8a9a5SSteve French buf->ccontext.NameOffset = cpu_to_le16(offsetof 216438c8a9a5SSteve French (struct create_durable, Name)); 216538c8a9a5SSteve French buf->ccontext.NameLength = cpu_to_le16(4); 216638c8a9a5SSteve French /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */ 216738c8a9a5SSteve French buf->Name[0] = 'D'; 216838c8a9a5SSteve French buf->Name[1] = 'H'; 216938c8a9a5SSteve French buf->Name[2] = 'n'; 217038c8a9a5SSteve French buf->Name[3] = 'Q'; 217138c8a9a5SSteve French return buf; 217238c8a9a5SSteve French } 217338c8a9a5SSteve French 217438c8a9a5SSteve French static struct create_durable * 217538c8a9a5SSteve French create_reconnect_durable_buf(struct cifs_fid *fid) 217638c8a9a5SSteve French { 217738c8a9a5SSteve French struct create_durable *buf; 217838c8a9a5SSteve French 217938c8a9a5SSteve French buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL); 218038c8a9a5SSteve French if (!buf) 218138c8a9a5SSteve French return NULL; 218238c8a9a5SSteve French 218338c8a9a5SSteve French buf->ccontext.DataOffset = cpu_to_le16(offsetof 218438c8a9a5SSteve French (struct create_durable, Data)); 218538c8a9a5SSteve French buf->ccontext.DataLength = cpu_to_le32(16); 218638c8a9a5SSteve French buf->ccontext.NameOffset = cpu_to_le16(offsetof 218738c8a9a5SSteve French (struct create_durable, Name)); 218838c8a9a5SSteve French buf->ccontext.NameLength = cpu_to_le16(4); 218938c8a9a5SSteve French buf->Data.Fid.PersistentFileId = fid->persistent_fid; 219038c8a9a5SSteve French buf->Data.Fid.VolatileFileId = fid->volatile_fid; 219138c8a9a5SSteve French /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */ 219238c8a9a5SSteve French buf->Name[0] = 'D'; 219338c8a9a5SSteve French buf->Name[1] = 'H'; 219438c8a9a5SSteve French buf->Name[2] = 'n'; 219538c8a9a5SSteve French buf->Name[3] = 'C'; 219638c8a9a5SSteve French return buf; 219738c8a9a5SSteve French } 219838c8a9a5SSteve French 219938c8a9a5SSteve French static void 220038c8a9a5SSteve French parse_query_id_ctxt(struct create_context *cc, struct smb2_file_all_info *buf) 220138c8a9a5SSteve French { 220238c8a9a5SSteve French struct create_disk_id_rsp *pdisk_id = (struct create_disk_id_rsp *)cc; 220338c8a9a5SSteve French 220438c8a9a5SSteve French cifs_dbg(FYI, "parse query id context 0x%llx 0x%llx\n", 220538c8a9a5SSteve French pdisk_id->DiskFileId, pdisk_id->VolumeId); 220638c8a9a5SSteve French buf->IndexNumber = pdisk_id->DiskFileId; 220738c8a9a5SSteve French } 220838c8a9a5SSteve French 220938c8a9a5SSteve French static void 221038c8a9a5SSteve French parse_posix_ctxt(struct create_context *cc, struct smb2_file_all_info *info, 221138c8a9a5SSteve French struct create_posix_rsp *posix) 221238c8a9a5SSteve French { 221338c8a9a5SSteve French int sid_len; 221438c8a9a5SSteve French u8 *beg = (u8 *)cc + le16_to_cpu(cc->DataOffset); 221538c8a9a5SSteve French u8 *end = beg + le32_to_cpu(cc->DataLength); 221638c8a9a5SSteve French u8 *sid; 221738c8a9a5SSteve French 221838c8a9a5SSteve French memset(posix, 0, sizeof(*posix)); 221938c8a9a5SSteve French 222038c8a9a5SSteve French posix->nlink = le32_to_cpu(*(__le32 *)(beg + 0)); 222138c8a9a5SSteve French posix->reparse_tag = le32_to_cpu(*(__le32 *)(beg + 4)); 222238c8a9a5SSteve French posix->mode = le32_to_cpu(*(__le32 *)(beg + 8)); 222338c8a9a5SSteve French 222438c8a9a5SSteve French sid = beg + 12; 222538c8a9a5SSteve French sid_len = posix_info_sid_size(sid, end); 222638c8a9a5SSteve French if (sid_len < 0) { 222738c8a9a5SSteve French cifs_dbg(VFS, "bad owner sid in posix create response\n"); 222838c8a9a5SSteve French return; 222938c8a9a5SSteve French } 223038c8a9a5SSteve French memcpy(&posix->owner, sid, sid_len); 223138c8a9a5SSteve French 223238c8a9a5SSteve French sid = sid + sid_len; 223338c8a9a5SSteve French sid_len = posix_info_sid_size(sid, end); 223438c8a9a5SSteve French if (sid_len < 0) { 223538c8a9a5SSteve French cifs_dbg(VFS, "bad group sid in posix create response\n"); 223638c8a9a5SSteve French return; 223738c8a9a5SSteve French } 223838c8a9a5SSteve French memcpy(&posix->group, sid, sid_len); 223938c8a9a5SSteve French 224038c8a9a5SSteve French cifs_dbg(FYI, "nlink=%d mode=%o reparse_tag=%x\n", 224138c8a9a5SSteve French posix->nlink, posix->mode, posix->reparse_tag); 224238c8a9a5SSteve French } 224338c8a9a5SSteve French 224417a0f64cSPaulo Alcantara int smb2_parse_contexts(struct TCP_Server_Info *server, 224517a0f64cSPaulo Alcantara struct kvec *rsp_iov, 224617a0f64cSPaulo Alcantara unsigned int *epoch, 224717a0f64cSPaulo Alcantara char *lease_key, __u8 *oplock, 224838c8a9a5SSteve French struct smb2_file_all_info *buf, 224938c8a9a5SSteve French struct create_posix_rsp *posix) 225038c8a9a5SSteve French { 225117a0f64cSPaulo Alcantara struct smb2_create_rsp *rsp = rsp_iov->iov_base; 225238c8a9a5SSteve French struct create_context *cc; 225317a0f64cSPaulo Alcantara size_t rem, off, len; 225417a0f64cSPaulo Alcantara size_t doff, dlen; 225517a0f64cSPaulo Alcantara size_t noff, nlen; 225638c8a9a5SSteve French char *name; 225738c8a9a5SSteve French static const char smb3_create_tag_posix[] = { 225838c8a9a5SSteve French 0x93, 0xAD, 0x25, 0x50, 0x9C, 225938c8a9a5SSteve French 0xB4, 0x11, 0xE7, 0xB4, 0x23, 0x83, 226038c8a9a5SSteve French 0xDE, 0x96, 0x8B, 0xCD, 0x7C 226138c8a9a5SSteve French }; 226238c8a9a5SSteve French 226338c8a9a5SSteve French *oplock = 0; 226417a0f64cSPaulo Alcantara 226517a0f64cSPaulo Alcantara off = le32_to_cpu(rsp->CreateContextsOffset); 226617a0f64cSPaulo Alcantara rem = le32_to_cpu(rsp->CreateContextsLength); 226717a0f64cSPaulo Alcantara if (check_add_overflow(off, rem, &len) || len > rsp_iov->iov_len) 226817a0f64cSPaulo Alcantara return -EINVAL; 226917a0f64cSPaulo Alcantara cc = (struct create_context *)((u8 *)rsp + off); 227038c8a9a5SSteve French 227138c8a9a5SSteve French /* Initialize inode number to 0 in case no valid data in qfid context */ 227238c8a9a5SSteve French if (buf) 227338c8a9a5SSteve French buf->IndexNumber = 0; 227438c8a9a5SSteve French 227517a0f64cSPaulo Alcantara while (rem >= sizeof(*cc)) { 227617a0f64cSPaulo Alcantara doff = le16_to_cpu(cc->DataOffset); 227717a0f64cSPaulo Alcantara dlen = le32_to_cpu(cc->DataLength); 227817a0f64cSPaulo Alcantara if (check_add_overflow(doff, dlen, &len) || len > rem) 227917a0f64cSPaulo Alcantara return -EINVAL; 228017a0f64cSPaulo Alcantara 228117a0f64cSPaulo Alcantara noff = le16_to_cpu(cc->NameOffset); 228217a0f64cSPaulo Alcantara nlen = le16_to_cpu(cc->NameLength); 228338298acbSPaulo Alcantara if (noff + nlen > doff) 228417a0f64cSPaulo Alcantara return -EINVAL; 228517a0f64cSPaulo Alcantara 228617a0f64cSPaulo Alcantara name = (char *)cc + noff; 228717a0f64cSPaulo Alcantara switch (nlen) { 228817a0f64cSPaulo Alcantara case 4: 228917a0f64cSPaulo Alcantara if (!strncmp(name, SMB2_CREATE_REQUEST_LEASE, 4)) { 229038c8a9a5SSteve French *oplock = server->ops->parse_lease_buf(cc, epoch, 229138c8a9a5SSteve French lease_key); 229217a0f64cSPaulo Alcantara } else if (buf && 229317a0f64cSPaulo Alcantara !strncmp(name, SMB2_CREATE_QUERY_ON_DISK_ID, 4)) { 229438c8a9a5SSteve French parse_query_id_ctxt(cc, buf); 229538c8a9a5SSteve French } 229638c8a9a5SSteve French break; 229717a0f64cSPaulo Alcantara case 16: 229817a0f64cSPaulo Alcantara if (posix && !memcmp(name, smb3_create_tag_posix, 16)) 229917a0f64cSPaulo Alcantara parse_posix_ctxt(cc, buf, posix); 230017a0f64cSPaulo Alcantara break; 230117a0f64cSPaulo Alcantara default: 230217a0f64cSPaulo Alcantara cifs_dbg(FYI, "%s: unhandled context (nlen=%zu dlen=%zu)\n", 230317a0f64cSPaulo Alcantara __func__, nlen, dlen); 230417a0f64cSPaulo Alcantara if (IS_ENABLED(CONFIG_CIFS_DEBUG2)) 230517a0f64cSPaulo Alcantara cifs_dump_mem("context data: ", cc, dlen); 230617a0f64cSPaulo Alcantara break; 230717a0f64cSPaulo Alcantara } 230817a0f64cSPaulo Alcantara 230917a0f64cSPaulo Alcantara off = le32_to_cpu(cc->Next); 231017a0f64cSPaulo Alcantara if (!off) 231117a0f64cSPaulo Alcantara break; 231217a0f64cSPaulo Alcantara if (check_sub_overflow(rem, off, &rem)) 231317a0f64cSPaulo Alcantara return -EINVAL; 231417a0f64cSPaulo Alcantara cc = (struct create_context *)((u8 *)cc + off); 231538c8a9a5SSteve French } 231638c8a9a5SSteve French 231738c8a9a5SSteve French if (rsp->OplockLevel != SMB2_OPLOCK_LEVEL_LEASE) 231838c8a9a5SSteve French *oplock = rsp->OplockLevel; 231938c8a9a5SSteve French 232017a0f64cSPaulo Alcantara return 0; 232138c8a9a5SSteve French } 232238c8a9a5SSteve French 232338c8a9a5SSteve French static int 232438c8a9a5SSteve French add_lease_context(struct TCP_Server_Info *server, 232538c8a9a5SSteve French struct smb2_create_req *req, 232638c8a9a5SSteve French struct kvec *iov, 232738c8a9a5SSteve French unsigned int *num_iovec, u8 *lease_key, __u8 *oplock) 232838c8a9a5SSteve French { 232938c8a9a5SSteve French unsigned int num = *num_iovec; 233038c8a9a5SSteve French 233138c8a9a5SSteve French iov[num].iov_base = server->ops->create_lease_buf(lease_key, *oplock); 233238c8a9a5SSteve French if (iov[num].iov_base == NULL) 233338c8a9a5SSteve French return -ENOMEM; 233438c8a9a5SSteve French iov[num].iov_len = server->vals->create_lease_size; 233538c8a9a5SSteve French req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE; 233638c8a9a5SSteve French *num_iovec = num + 1; 233738c8a9a5SSteve French return 0; 233838c8a9a5SSteve French } 233938c8a9a5SSteve French 234038c8a9a5SSteve French static struct create_durable_v2 * 234138c8a9a5SSteve French create_durable_v2_buf(struct cifs_open_parms *oparms) 234238c8a9a5SSteve French { 234338c8a9a5SSteve French struct cifs_fid *pfid = oparms->fid; 234438c8a9a5SSteve French struct create_durable_v2 *buf; 234538c8a9a5SSteve French 234638c8a9a5SSteve French buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL); 234738c8a9a5SSteve French if (!buf) 234838c8a9a5SSteve French return NULL; 234938c8a9a5SSteve French 235038c8a9a5SSteve French buf->ccontext.DataOffset = cpu_to_le16(offsetof 235138c8a9a5SSteve French (struct create_durable_v2, dcontext)); 235238c8a9a5SSteve French buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2)); 235338c8a9a5SSteve French buf->ccontext.NameOffset = cpu_to_le16(offsetof 235438c8a9a5SSteve French (struct create_durable_v2, Name)); 235538c8a9a5SSteve French buf->ccontext.NameLength = cpu_to_le16(4); 235638c8a9a5SSteve French 235738c8a9a5SSteve French /* 235838c8a9a5SSteve French * NB: Handle timeout defaults to 0, which allows server to choose 235938c8a9a5SSteve French * (most servers default to 120 seconds) and most clients default to 0. 236038c8a9a5SSteve French * This can be overridden at mount ("handletimeout=") if the user wants 236138c8a9a5SSteve French * a different persistent (or resilient) handle timeout for all opens 23622c75426cSSteve French * on a particular SMB3 mount. 236338c8a9a5SSteve French */ 236438c8a9a5SSteve French buf->dcontext.Timeout = cpu_to_le32(oparms->tcon->handle_timeout); 236538c8a9a5SSteve French buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT); 236638c8a9a5SSteve French generate_random_uuid(buf->dcontext.CreateGuid); 236738c8a9a5SSteve French memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16); 236838c8a9a5SSteve French 236938c8a9a5SSteve French /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */ 237038c8a9a5SSteve French buf->Name[0] = 'D'; 237138c8a9a5SSteve French buf->Name[1] = 'H'; 237238c8a9a5SSteve French buf->Name[2] = '2'; 237338c8a9a5SSteve French buf->Name[3] = 'Q'; 237438c8a9a5SSteve French return buf; 237538c8a9a5SSteve French } 237638c8a9a5SSteve French 237738c8a9a5SSteve French static struct create_durable_handle_reconnect_v2 * 237838c8a9a5SSteve French create_reconnect_durable_v2_buf(struct cifs_fid *fid) 237938c8a9a5SSteve French { 238038c8a9a5SSteve French struct create_durable_handle_reconnect_v2 *buf; 238138c8a9a5SSteve French 238238c8a9a5SSteve French buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2), 238338c8a9a5SSteve French GFP_KERNEL); 238438c8a9a5SSteve French if (!buf) 238538c8a9a5SSteve French return NULL; 238638c8a9a5SSteve French 238738c8a9a5SSteve French buf->ccontext.DataOffset = 238838c8a9a5SSteve French cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2, 238938c8a9a5SSteve French dcontext)); 239038c8a9a5SSteve French buf->ccontext.DataLength = 239138c8a9a5SSteve French cpu_to_le32(sizeof(struct durable_reconnect_context_v2)); 239238c8a9a5SSteve French buf->ccontext.NameOffset = 239338c8a9a5SSteve French cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2, 239438c8a9a5SSteve French Name)); 239538c8a9a5SSteve French buf->ccontext.NameLength = cpu_to_le16(4); 239638c8a9a5SSteve French 239738c8a9a5SSteve French buf->dcontext.Fid.PersistentFileId = fid->persistent_fid; 239838c8a9a5SSteve French buf->dcontext.Fid.VolatileFileId = fid->volatile_fid; 239938c8a9a5SSteve French buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT); 240038c8a9a5SSteve French memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16); 240138c8a9a5SSteve French 240238c8a9a5SSteve French /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */ 240338c8a9a5SSteve French buf->Name[0] = 'D'; 240438c8a9a5SSteve French buf->Name[1] = 'H'; 240538c8a9a5SSteve French buf->Name[2] = '2'; 240638c8a9a5SSteve French buf->Name[3] = 'C'; 240738c8a9a5SSteve French return buf; 240838c8a9a5SSteve French } 240938c8a9a5SSteve French 241038c8a9a5SSteve French static int 241138c8a9a5SSteve French add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec, 241238c8a9a5SSteve French struct cifs_open_parms *oparms) 241338c8a9a5SSteve French { 241438c8a9a5SSteve French unsigned int num = *num_iovec; 241538c8a9a5SSteve French 241638c8a9a5SSteve French iov[num].iov_base = create_durable_v2_buf(oparms); 241738c8a9a5SSteve French if (iov[num].iov_base == NULL) 241838c8a9a5SSteve French return -ENOMEM; 241938c8a9a5SSteve French iov[num].iov_len = sizeof(struct create_durable_v2); 242038c8a9a5SSteve French *num_iovec = num + 1; 242138c8a9a5SSteve French return 0; 242238c8a9a5SSteve French } 242338c8a9a5SSteve French 242438c8a9a5SSteve French static int 242538c8a9a5SSteve French add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec, 242638c8a9a5SSteve French struct cifs_open_parms *oparms) 242738c8a9a5SSteve French { 242838c8a9a5SSteve French unsigned int num = *num_iovec; 242938c8a9a5SSteve French 243038c8a9a5SSteve French /* indicate that we don't need to relock the file */ 243138c8a9a5SSteve French oparms->reconnect = false; 243238c8a9a5SSteve French 243338c8a9a5SSteve French iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid); 243438c8a9a5SSteve French if (iov[num].iov_base == NULL) 243538c8a9a5SSteve French return -ENOMEM; 243638c8a9a5SSteve French iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2); 243738c8a9a5SSteve French *num_iovec = num + 1; 243838c8a9a5SSteve French return 0; 243938c8a9a5SSteve French } 244038c8a9a5SSteve French 244138c8a9a5SSteve French static int 244238c8a9a5SSteve French add_durable_context(struct kvec *iov, unsigned int *num_iovec, 244338c8a9a5SSteve French struct cifs_open_parms *oparms, bool use_persistent) 244438c8a9a5SSteve French { 244538c8a9a5SSteve French unsigned int num = *num_iovec; 244638c8a9a5SSteve French 244738c8a9a5SSteve French if (use_persistent) { 244838c8a9a5SSteve French if (oparms->reconnect) 244938c8a9a5SSteve French return add_durable_reconnect_v2_context(iov, num_iovec, 245038c8a9a5SSteve French oparms); 245138c8a9a5SSteve French else 245238c8a9a5SSteve French return add_durable_v2_context(iov, num_iovec, oparms); 245338c8a9a5SSteve French } 245438c8a9a5SSteve French 245538c8a9a5SSteve French if (oparms->reconnect) { 245638c8a9a5SSteve French iov[num].iov_base = create_reconnect_durable_buf(oparms->fid); 245738c8a9a5SSteve French /* indicate that we don't need to relock the file */ 245838c8a9a5SSteve French oparms->reconnect = false; 245938c8a9a5SSteve French } else 246038c8a9a5SSteve French iov[num].iov_base = create_durable_buf(); 246138c8a9a5SSteve French if (iov[num].iov_base == NULL) 246238c8a9a5SSteve French return -ENOMEM; 246338c8a9a5SSteve French iov[num].iov_len = sizeof(struct create_durable); 246438c8a9a5SSteve French *num_iovec = num + 1; 246538c8a9a5SSteve French return 0; 246638c8a9a5SSteve French } 246738c8a9a5SSteve French 246838c8a9a5SSteve French /* See MS-SMB2 2.2.13.2.7 */ 246938c8a9a5SSteve French static struct crt_twarp_ctxt * 247038c8a9a5SSteve French create_twarp_buf(__u64 timewarp) 247138c8a9a5SSteve French { 247238c8a9a5SSteve French struct crt_twarp_ctxt *buf; 247338c8a9a5SSteve French 247438c8a9a5SSteve French buf = kzalloc(sizeof(struct crt_twarp_ctxt), GFP_KERNEL); 247538c8a9a5SSteve French if (!buf) 247638c8a9a5SSteve French return NULL; 247738c8a9a5SSteve French 247838c8a9a5SSteve French buf->ccontext.DataOffset = cpu_to_le16(offsetof 247938c8a9a5SSteve French (struct crt_twarp_ctxt, Timestamp)); 248038c8a9a5SSteve French buf->ccontext.DataLength = cpu_to_le32(8); 248138c8a9a5SSteve French buf->ccontext.NameOffset = cpu_to_le16(offsetof 248238c8a9a5SSteve French (struct crt_twarp_ctxt, Name)); 248338c8a9a5SSteve French buf->ccontext.NameLength = cpu_to_le16(4); 248438c8a9a5SSteve French /* SMB2_CREATE_TIMEWARP_TOKEN is "TWrp" */ 248538c8a9a5SSteve French buf->Name[0] = 'T'; 248638c8a9a5SSteve French buf->Name[1] = 'W'; 248738c8a9a5SSteve French buf->Name[2] = 'r'; 248838c8a9a5SSteve French buf->Name[3] = 'p'; 248938c8a9a5SSteve French buf->Timestamp = cpu_to_le64(timewarp); 249038c8a9a5SSteve French return buf; 249138c8a9a5SSteve French } 249238c8a9a5SSteve French 249338c8a9a5SSteve French /* See MS-SMB2 2.2.13.2.7 */ 249438c8a9a5SSteve French static int 249538c8a9a5SSteve French add_twarp_context(struct kvec *iov, unsigned int *num_iovec, __u64 timewarp) 249638c8a9a5SSteve French { 249738c8a9a5SSteve French unsigned int num = *num_iovec; 249838c8a9a5SSteve French 249938c8a9a5SSteve French iov[num].iov_base = create_twarp_buf(timewarp); 250038c8a9a5SSteve French if (iov[num].iov_base == NULL) 250138c8a9a5SSteve French return -ENOMEM; 250238c8a9a5SSteve French iov[num].iov_len = sizeof(struct crt_twarp_ctxt); 250338c8a9a5SSteve French *num_iovec = num + 1; 250438c8a9a5SSteve French return 0; 250538c8a9a5SSteve French } 250638c8a9a5SSteve French 25072c75426cSSteve French /* See http://technet.microsoft.com/en-us/library/hh509017(v=ws.10).aspx */ 250838c8a9a5SSteve French static void setup_owner_group_sids(char *buf) 250938c8a9a5SSteve French { 251038c8a9a5SSteve French struct owner_group_sids *sids = (struct owner_group_sids *)buf; 251138c8a9a5SSteve French 251238c8a9a5SSteve French /* Populate the user ownership fields S-1-5-88-1 */ 251338c8a9a5SSteve French sids->owner.Revision = 1; 251438c8a9a5SSteve French sids->owner.NumAuth = 3; 251538c8a9a5SSteve French sids->owner.Authority[5] = 5; 251638c8a9a5SSteve French sids->owner.SubAuthorities[0] = cpu_to_le32(88); 251738c8a9a5SSteve French sids->owner.SubAuthorities[1] = cpu_to_le32(1); 251838c8a9a5SSteve French sids->owner.SubAuthorities[2] = cpu_to_le32(current_fsuid().val); 251938c8a9a5SSteve French 252038c8a9a5SSteve French /* Populate the group ownership fields S-1-5-88-2 */ 252138c8a9a5SSteve French sids->group.Revision = 1; 252238c8a9a5SSteve French sids->group.NumAuth = 3; 252338c8a9a5SSteve French sids->group.Authority[5] = 5; 252438c8a9a5SSteve French sids->group.SubAuthorities[0] = cpu_to_le32(88); 252538c8a9a5SSteve French sids->group.SubAuthorities[1] = cpu_to_le32(2); 252638c8a9a5SSteve French sids->group.SubAuthorities[2] = cpu_to_le32(current_fsgid().val); 252738c8a9a5SSteve French 252838c8a9a5SSteve 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); 252938c8a9a5SSteve French } 253038c8a9a5SSteve French 253138c8a9a5SSteve French /* See MS-SMB2 2.2.13.2.2 and MS-DTYP 2.4.6 */ 253238c8a9a5SSteve French static struct crt_sd_ctxt * 253338c8a9a5SSteve French create_sd_buf(umode_t mode, bool set_owner, unsigned int *len) 253438c8a9a5SSteve French { 253538c8a9a5SSteve French struct crt_sd_ctxt *buf; 253638c8a9a5SSteve French __u8 *ptr, *aclptr; 253738c8a9a5SSteve French unsigned int acelen, acl_size, ace_count; 253838c8a9a5SSteve French unsigned int owner_offset = 0; 253938c8a9a5SSteve French unsigned int group_offset = 0; 254038c8a9a5SSteve French struct smb3_acl acl = {}; 254138c8a9a5SSteve French 254238c8a9a5SSteve French *len = round_up(sizeof(struct crt_sd_ctxt) + (sizeof(struct cifs_ace) * 4), 8); 254338c8a9a5SSteve French 254438c8a9a5SSteve French if (set_owner) { 254538c8a9a5SSteve French /* sizeof(struct owner_group_sids) is already multiple of 8 so no need to round */ 254638c8a9a5SSteve French *len += sizeof(struct owner_group_sids); 254738c8a9a5SSteve French } 254838c8a9a5SSteve French 254938c8a9a5SSteve French buf = kzalloc(*len, GFP_KERNEL); 255038c8a9a5SSteve French if (buf == NULL) 255138c8a9a5SSteve French return buf; 255238c8a9a5SSteve French 255338c8a9a5SSteve French ptr = (__u8 *)&buf[1]; 255438c8a9a5SSteve French if (set_owner) { 255538c8a9a5SSteve French /* offset fields are from beginning of security descriptor not of create context */ 255638c8a9a5SSteve French owner_offset = ptr - (__u8 *)&buf->sd; 255738c8a9a5SSteve French buf->sd.OffsetOwner = cpu_to_le32(owner_offset); 255838c8a9a5SSteve French group_offset = owner_offset + offsetof(struct owner_group_sids, group); 255938c8a9a5SSteve French buf->sd.OffsetGroup = cpu_to_le32(group_offset); 256038c8a9a5SSteve French 256138c8a9a5SSteve French setup_owner_group_sids(ptr); 256238c8a9a5SSteve French ptr += sizeof(struct owner_group_sids); 256338c8a9a5SSteve French } else { 256438c8a9a5SSteve French buf->sd.OffsetOwner = 0; 256538c8a9a5SSteve French buf->sd.OffsetGroup = 0; 256638c8a9a5SSteve French } 256738c8a9a5SSteve French 256838c8a9a5SSteve French buf->ccontext.DataOffset = cpu_to_le16(offsetof(struct crt_sd_ctxt, sd)); 256938c8a9a5SSteve French buf->ccontext.NameOffset = cpu_to_le16(offsetof(struct crt_sd_ctxt, Name)); 257038c8a9a5SSteve French buf->ccontext.NameLength = cpu_to_le16(4); 257138c8a9a5SSteve French /* SMB2_CREATE_SD_BUFFER_TOKEN is "SecD" */ 257238c8a9a5SSteve French buf->Name[0] = 'S'; 257338c8a9a5SSteve French buf->Name[1] = 'e'; 257438c8a9a5SSteve French buf->Name[2] = 'c'; 257538c8a9a5SSteve French buf->Name[3] = 'D'; 257638c8a9a5SSteve French buf->sd.Revision = 1; /* Must be one see MS-DTYP 2.4.6 */ 257738c8a9a5SSteve French 257838c8a9a5SSteve French /* 257938c8a9a5SSteve French * ACL is "self relative" ie ACL is stored in contiguous block of memory 258038c8a9a5SSteve French * and "DP" ie the DACL is present 258138c8a9a5SSteve French */ 258238c8a9a5SSteve French buf->sd.Control = cpu_to_le16(ACL_CONTROL_SR | ACL_CONTROL_DP); 258338c8a9a5SSteve French 258438c8a9a5SSteve French /* offset owner, group and Sbz1 and SACL are all zero */ 258538c8a9a5SSteve French buf->sd.OffsetDacl = cpu_to_le32(ptr - (__u8 *)&buf->sd); 258638c8a9a5SSteve French /* Ship the ACL for now. we will copy it into buf later. */ 258738c8a9a5SSteve French aclptr = ptr; 258838c8a9a5SSteve French ptr += sizeof(struct smb3_acl); 258938c8a9a5SSteve French 259038c8a9a5SSteve French /* create one ACE to hold the mode embedded in reserved special SID */ 259138c8a9a5SSteve French acelen = setup_special_mode_ACE((struct cifs_ace *)ptr, (__u64)mode); 259238c8a9a5SSteve French ptr += acelen; 259338c8a9a5SSteve French acl_size = acelen + sizeof(struct smb3_acl); 259438c8a9a5SSteve French ace_count = 1; 259538c8a9a5SSteve French 259638c8a9a5SSteve French if (set_owner) { 259738c8a9a5SSteve French /* we do not need to reallocate buffer to add the two more ACEs. plenty of space */ 259838c8a9a5SSteve French acelen = setup_special_user_owner_ACE((struct cifs_ace *)ptr); 259938c8a9a5SSteve French ptr += acelen; 260038c8a9a5SSteve French acl_size += acelen; 260138c8a9a5SSteve French ace_count += 1; 260238c8a9a5SSteve French } 260338c8a9a5SSteve French 260438c8a9a5SSteve French /* and one more ACE to allow access for authenticated users */ 260538c8a9a5SSteve French acelen = setup_authusers_ACE((struct cifs_ace *)ptr); 260638c8a9a5SSteve French ptr += acelen; 260738c8a9a5SSteve French acl_size += acelen; 260838c8a9a5SSteve French ace_count += 1; 260938c8a9a5SSteve French 261038c8a9a5SSteve French acl.AclRevision = ACL_REVISION; /* See 2.4.4.1 of MS-DTYP */ 261138c8a9a5SSteve French acl.AclSize = cpu_to_le16(acl_size); 261238c8a9a5SSteve French acl.AceCount = cpu_to_le16(ace_count); 261338c8a9a5SSteve French /* acl.Sbz1 and Sbz2 MBZ so are not set here, but initialized above */ 261438c8a9a5SSteve French memcpy(aclptr, &acl, sizeof(struct smb3_acl)); 261538c8a9a5SSteve French 261638c8a9a5SSteve French buf->ccontext.DataLength = cpu_to_le32(ptr - (__u8 *)&buf->sd); 261738c8a9a5SSteve French *len = round_up((unsigned int)(ptr - (__u8 *)buf), 8); 261838c8a9a5SSteve French 261938c8a9a5SSteve French return buf; 262038c8a9a5SSteve French } 262138c8a9a5SSteve French 262238c8a9a5SSteve French static int 262338c8a9a5SSteve French add_sd_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode, bool set_owner) 262438c8a9a5SSteve French { 262538c8a9a5SSteve French unsigned int num = *num_iovec; 262638c8a9a5SSteve French unsigned int len = 0; 262738c8a9a5SSteve French 262838c8a9a5SSteve French iov[num].iov_base = create_sd_buf(mode, set_owner, &len); 262938c8a9a5SSteve French if (iov[num].iov_base == NULL) 263038c8a9a5SSteve French return -ENOMEM; 263138c8a9a5SSteve French iov[num].iov_len = len; 263238c8a9a5SSteve French *num_iovec = num + 1; 263338c8a9a5SSteve French return 0; 263438c8a9a5SSteve French } 263538c8a9a5SSteve French 263638c8a9a5SSteve French static struct crt_query_id_ctxt * 263738c8a9a5SSteve French create_query_id_buf(void) 263838c8a9a5SSteve French { 263938c8a9a5SSteve French struct crt_query_id_ctxt *buf; 264038c8a9a5SSteve French 264138c8a9a5SSteve French buf = kzalloc(sizeof(struct crt_query_id_ctxt), GFP_KERNEL); 264238c8a9a5SSteve French if (!buf) 264338c8a9a5SSteve French return NULL; 264438c8a9a5SSteve French 264538c8a9a5SSteve French buf->ccontext.DataOffset = cpu_to_le16(0); 264638c8a9a5SSteve French buf->ccontext.DataLength = cpu_to_le32(0); 264738c8a9a5SSteve French buf->ccontext.NameOffset = cpu_to_le16(offsetof 264838c8a9a5SSteve French (struct crt_query_id_ctxt, Name)); 264938c8a9a5SSteve French buf->ccontext.NameLength = cpu_to_le16(4); 265038c8a9a5SSteve French /* SMB2_CREATE_QUERY_ON_DISK_ID is "QFid" */ 265138c8a9a5SSteve French buf->Name[0] = 'Q'; 265238c8a9a5SSteve French buf->Name[1] = 'F'; 265338c8a9a5SSteve French buf->Name[2] = 'i'; 265438c8a9a5SSteve French buf->Name[3] = 'd'; 265538c8a9a5SSteve French return buf; 265638c8a9a5SSteve French } 265738c8a9a5SSteve French 265838c8a9a5SSteve French /* See MS-SMB2 2.2.13.2.9 */ 265938c8a9a5SSteve French static int 266038c8a9a5SSteve French add_query_id_context(struct kvec *iov, unsigned int *num_iovec) 266138c8a9a5SSteve French { 266238c8a9a5SSteve French unsigned int num = *num_iovec; 266338c8a9a5SSteve French 266438c8a9a5SSteve French iov[num].iov_base = create_query_id_buf(); 266538c8a9a5SSteve French if (iov[num].iov_base == NULL) 266638c8a9a5SSteve French return -ENOMEM; 266738c8a9a5SSteve French iov[num].iov_len = sizeof(struct crt_query_id_ctxt); 266838c8a9a5SSteve French *num_iovec = num + 1; 266938c8a9a5SSteve French return 0; 267038c8a9a5SSteve French } 267138c8a9a5SSteve French 267238c8a9a5SSteve French static int 267338c8a9a5SSteve French alloc_path_with_tree_prefix(__le16 **out_path, int *out_size, int *out_len, 267438c8a9a5SSteve French const char *treename, const __le16 *path) 267538c8a9a5SSteve French { 267638c8a9a5SSteve French int treename_len, path_len; 267738c8a9a5SSteve French struct nls_table *cp; 267838c8a9a5SSteve French const __le16 sep[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)}; 267938c8a9a5SSteve French 268038c8a9a5SSteve French /* 268138c8a9a5SSteve French * skip leading "\\" 268238c8a9a5SSteve French */ 268338c8a9a5SSteve French treename_len = strlen(treename); 268438c8a9a5SSteve French if (treename_len < 2 || !(treename[0] == '\\' && treename[1] == '\\')) 268538c8a9a5SSteve French return -EINVAL; 268638c8a9a5SSteve French 268738c8a9a5SSteve French treename += 2; 268838c8a9a5SSteve French treename_len -= 2; 268938c8a9a5SSteve French 269038c8a9a5SSteve French path_len = UniStrnlen((wchar_t *)path, PATH_MAX); 269138c8a9a5SSteve French 269238c8a9a5SSteve French /* make room for one path separator only if @path isn't empty */ 269338c8a9a5SSteve French *out_len = treename_len + (path[0] ? 1 : 0) + path_len; 269438c8a9a5SSteve French 269538c8a9a5SSteve French /* 269638c8a9a5SSteve French * final path needs to be 8-byte aligned as specified in 269738c8a9a5SSteve French * MS-SMB2 2.2.13 SMB2 CREATE Request. 269838c8a9a5SSteve French */ 269938c8a9a5SSteve French *out_size = round_up(*out_len * sizeof(__le16), 8); 270038c8a9a5SSteve French *out_path = kzalloc(*out_size + sizeof(__le16) /* null */, GFP_KERNEL); 270138c8a9a5SSteve French if (!*out_path) 270238c8a9a5SSteve French return -ENOMEM; 270338c8a9a5SSteve French 270438c8a9a5SSteve French cp = load_nls_default(); 270538c8a9a5SSteve French cifs_strtoUTF16(*out_path, treename, treename_len, cp); 270638c8a9a5SSteve French 270738c8a9a5SSteve French /* Do not append the separator if the path is empty */ 270838c8a9a5SSteve French if (path[0] != cpu_to_le16(0x0000)) { 2709de548452SDr. David Alan Gilbert UniStrcat((wchar_t *)*out_path, (wchar_t *)sep); 2710de548452SDr. David Alan Gilbert UniStrcat((wchar_t *)*out_path, (wchar_t *)path); 271138c8a9a5SSteve French } 271238c8a9a5SSteve French 271338c8a9a5SSteve French unload_nls(cp); 271438c8a9a5SSteve French 271538c8a9a5SSteve French return 0; 271638c8a9a5SSteve French } 271738c8a9a5SSteve French 271838c8a9a5SSteve French int smb311_posix_mkdir(const unsigned int xid, struct inode *inode, 271938c8a9a5SSteve French umode_t mode, struct cifs_tcon *tcon, 272038c8a9a5SSteve French const char *full_path, 272138c8a9a5SSteve French struct cifs_sb_info *cifs_sb) 272238c8a9a5SSteve French { 272338c8a9a5SSteve French struct smb_rqst rqst; 272438c8a9a5SSteve French struct smb2_create_req *req; 272538c8a9a5SSteve French struct smb2_create_rsp *rsp = NULL; 272638c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 272738c8a9a5SSteve French struct kvec iov[3]; /* make sure at least one for each open context */ 272838c8a9a5SSteve French struct kvec rsp_iov = {NULL, 0}; 272938c8a9a5SSteve French int resp_buftype; 273038c8a9a5SSteve French int uni_path_len; 273138c8a9a5SSteve French __le16 *copy_path = NULL; 273238c8a9a5SSteve French int copy_size; 273338c8a9a5SSteve French int rc = 0; 273438c8a9a5SSteve French unsigned int n_iov = 2; 273538c8a9a5SSteve French __u32 file_attributes = 0; 273638c8a9a5SSteve French char *pc_buf = NULL; 273738c8a9a5SSteve French int flags = 0; 273838c8a9a5SSteve French unsigned int total_len; 273938c8a9a5SSteve French __le16 *utf16_path = NULL; 274038c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 274138c8a9a5SSteve French 274238c8a9a5SSteve French cifs_dbg(FYI, "mkdir\n"); 274338c8a9a5SSteve French 274438c8a9a5SSteve French /* resource #1: path allocation */ 274538c8a9a5SSteve French utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); 274638c8a9a5SSteve French if (!utf16_path) 274738c8a9a5SSteve French return -ENOMEM; 274838c8a9a5SSteve French 274938c8a9a5SSteve French if (!ses || !server) { 275038c8a9a5SSteve French rc = -EIO; 275138c8a9a5SSteve French goto err_free_path; 275238c8a9a5SSteve French } 275338c8a9a5SSteve French 275438c8a9a5SSteve French /* resource #2: request */ 275538c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_CREATE, tcon, server, 275638c8a9a5SSteve French (void **) &req, &total_len); 275738c8a9a5SSteve French if (rc) 275838c8a9a5SSteve French goto err_free_path; 275938c8a9a5SSteve French 276038c8a9a5SSteve French 276138c8a9a5SSteve French if (smb3_encryption_required(tcon)) 276238c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 276338c8a9a5SSteve French 276438c8a9a5SSteve French req->ImpersonationLevel = IL_IMPERSONATION; 276538c8a9a5SSteve French req->DesiredAccess = cpu_to_le32(FILE_WRITE_ATTRIBUTES); 276638c8a9a5SSteve French /* File attributes ignored on open (used in create though) */ 276738c8a9a5SSteve French req->FileAttributes = cpu_to_le32(file_attributes); 276838c8a9a5SSteve French req->ShareAccess = FILE_SHARE_ALL_LE; 276938c8a9a5SSteve French req->CreateDisposition = cpu_to_le32(FILE_CREATE); 277038c8a9a5SSteve French req->CreateOptions = cpu_to_le32(CREATE_NOT_FILE); 277138c8a9a5SSteve French 277238c8a9a5SSteve French iov[0].iov_base = (char *)req; 277338c8a9a5SSteve French /* -1 since last byte is buf[0] which is sent below (path) */ 277438c8a9a5SSteve French iov[0].iov_len = total_len - 1; 277538c8a9a5SSteve French 277638c8a9a5SSteve French req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req)); 277738c8a9a5SSteve French 277838c8a9a5SSteve French /* [MS-SMB2] 2.2.13 NameOffset: 277938c8a9a5SSteve French * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of 278038c8a9a5SSteve French * the SMB2 header, the file name includes a prefix that will 278138c8a9a5SSteve French * be processed during DFS name normalization as specified in 278238c8a9a5SSteve French * section 3.3.5.9. Otherwise, the file name is relative to 278338c8a9a5SSteve French * the share that is identified by the TreeId in the SMB2 278438c8a9a5SSteve French * header. 278538c8a9a5SSteve French */ 278638c8a9a5SSteve French if (tcon->share_flags & SHI1005_FLAGS_DFS) { 278738c8a9a5SSteve French int name_len; 278838c8a9a5SSteve French 278938c8a9a5SSteve French req->hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS; 279038c8a9a5SSteve French rc = alloc_path_with_tree_prefix(©_path, ©_size, 279138c8a9a5SSteve French &name_len, 279238c8a9a5SSteve French tcon->tree_name, utf16_path); 279338c8a9a5SSteve French if (rc) 279438c8a9a5SSteve French goto err_free_req; 279538c8a9a5SSteve French 279638c8a9a5SSteve French req->NameLength = cpu_to_le16(name_len * 2); 279738c8a9a5SSteve French uni_path_len = copy_size; 279838c8a9a5SSteve French /* free before overwriting resource */ 279938c8a9a5SSteve French kfree(utf16_path); 280038c8a9a5SSteve French utf16_path = copy_path; 280138c8a9a5SSteve French } else { 280238c8a9a5SSteve French uni_path_len = (2 * UniStrnlen((wchar_t *)utf16_path, PATH_MAX)) + 2; 280338c8a9a5SSteve French /* MUST set path len (NameLength) to 0 opening root of share */ 280438c8a9a5SSteve French req->NameLength = cpu_to_le16(uni_path_len - 2); 280538c8a9a5SSteve French if (uni_path_len % 8 != 0) { 280638c8a9a5SSteve French copy_size = roundup(uni_path_len, 8); 280738c8a9a5SSteve French copy_path = kzalloc(copy_size, GFP_KERNEL); 280838c8a9a5SSteve French if (!copy_path) { 280938c8a9a5SSteve French rc = -ENOMEM; 281038c8a9a5SSteve French goto err_free_req; 281138c8a9a5SSteve French } 281238c8a9a5SSteve French memcpy((char *)copy_path, (const char *)utf16_path, 281338c8a9a5SSteve French uni_path_len); 281438c8a9a5SSteve French uni_path_len = copy_size; 281538c8a9a5SSteve French /* free before overwriting resource */ 281638c8a9a5SSteve French kfree(utf16_path); 281738c8a9a5SSteve French utf16_path = copy_path; 281838c8a9a5SSteve French } 281938c8a9a5SSteve French } 282038c8a9a5SSteve French 282138c8a9a5SSteve French iov[1].iov_len = uni_path_len; 282238c8a9a5SSteve French iov[1].iov_base = utf16_path; 282338c8a9a5SSteve French req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_NONE; 282438c8a9a5SSteve French 282538c8a9a5SSteve French if (tcon->posix_extensions) { 282638c8a9a5SSteve French /* resource #3: posix buf */ 282738c8a9a5SSteve French rc = add_posix_context(iov, &n_iov, mode); 282838c8a9a5SSteve French if (rc) 282938c8a9a5SSteve French goto err_free_req; 283038c8a9a5SSteve French req->CreateContextsOffset = cpu_to_le32( 283138c8a9a5SSteve French sizeof(struct smb2_create_req) + 283238c8a9a5SSteve French iov[1].iov_len); 283338c8a9a5SSteve French pc_buf = iov[n_iov-1].iov_base; 283438c8a9a5SSteve French } 283538c8a9a5SSteve French 283638c8a9a5SSteve French 283738c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 283838c8a9a5SSteve French rqst.rq_iov = iov; 283938c8a9a5SSteve French rqst.rq_nvec = n_iov; 284038c8a9a5SSteve French 284138c8a9a5SSteve French /* no need to inc num_remote_opens because we close it just below */ 284238c8a9a5SSteve French trace_smb3_posix_mkdir_enter(xid, tcon->tid, ses->Suid, full_path, CREATE_NOT_FILE, 284338c8a9a5SSteve French FILE_WRITE_ATTRIBUTES); 284438c8a9a5SSteve French /* resource #4: response buffer */ 284538c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 284638c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 284738c8a9a5SSteve French if (rc) { 284838c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_CREATE_HE); 284938c8a9a5SSteve French trace_smb3_posix_mkdir_err(xid, tcon->tid, ses->Suid, 285038c8a9a5SSteve French CREATE_NOT_FILE, 285138c8a9a5SSteve French FILE_WRITE_ATTRIBUTES, rc); 285238c8a9a5SSteve French goto err_free_rsp_buf; 285338c8a9a5SSteve French } 285438c8a9a5SSteve French 285538c8a9a5SSteve French /* 285638c8a9a5SSteve French * Although unlikely to be possible for rsp to be null and rc not set, 285738c8a9a5SSteve French * adding check below is slightly safer long term (and quiets Coverity 285838c8a9a5SSteve French * warning) 285938c8a9a5SSteve French */ 286038c8a9a5SSteve French rsp = (struct smb2_create_rsp *)rsp_iov.iov_base; 286138c8a9a5SSteve French if (rsp == NULL) { 286238c8a9a5SSteve French rc = -EIO; 286338c8a9a5SSteve French kfree(pc_buf); 286438c8a9a5SSteve French goto err_free_req; 286538c8a9a5SSteve French } 286638c8a9a5SSteve French 286738c8a9a5SSteve French trace_smb3_posix_mkdir_done(xid, rsp->PersistentFileId, tcon->tid, ses->Suid, 286838c8a9a5SSteve French CREATE_NOT_FILE, FILE_WRITE_ATTRIBUTES); 286938c8a9a5SSteve French 287038c8a9a5SSteve French SMB2_close(xid, tcon, rsp->PersistentFileId, rsp->VolatileFileId); 287138c8a9a5SSteve French 287238c8a9a5SSteve French /* Eventually save off posix specific response info and timestaps */ 287338c8a9a5SSteve French 287438c8a9a5SSteve French err_free_rsp_buf: 287538c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp); 287638c8a9a5SSteve French kfree(pc_buf); 287738c8a9a5SSteve French err_free_req: 287838c8a9a5SSteve French cifs_small_buf_release(req); 287938c8a9a5SSteve French err_free_path: 288038c8a9a5SSteve French kfree(utf16_path); 288138c8a9a5SSteve French return rc; 288238c8a9a5SSteve French } 288338c8a9a5SSteve French 288438c8a9a5SSteve French int 288538c8a9a5SSteve French SMB2_open_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server, 288638c8a9a5SSteve French struct smb_rqst *rqst, __u8 *oplock, 288738c8a9a5SSteve French struct cifs_open_parms *oparms, __le16 *path) 288838c8a9a5SSteve French { 288938c8a9a5SSteve French struct smb2_create_req *req; 289038c8a9a5SSteve French unsigned int n_iov = 2; 289138c8a9a5SSteve French __u32 file_attributes = 0; 289238c8a9a5SSteve French int copy_size; 289338c8a9a5SSteve French int uni_path_len; 289438c8a9a5SSteve French unsigned int total_len; 289538c8a9a5SSteve French struct kvec *iov = rqst->rq_iov; 289638c8a9a5SSteve French __le16 *copy_path; 289738c8a9a5SSteve French int rc; 289838c8a9a5SSteve French 289938c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_CREATE, tcon, server, 290038c8a9a5SSteve French (void **) &req, &total_len); 290138c8a9a5SSteve French if (rc) 290238c8a9a5SSteve French return rc; 290338c8a9a5SSteve French 290438c8a9a5SSteve French iov[0].iov_base = (char *)req; 290538c8a9a5SSteve French /* -1 since last byte is buf[0] which is sent below (path) */ 290638c8a9a5SSteve French iov[0].iov_len = total_len - 1; 290738c8a9a5SSteve French 290838c8a9a5SSteve French if (oparms->create_options & CREATE_OPTION_READONLY) 290938c8a9a5SSteve French file_attributes |= ATTR_READONLY; 291038c8a9a5SSteve French if (oparms->create_options & CREATE_OPTION_SPECIAL) 291138c8a9a5SSteve French file_attributes |= ATTR_SYSTEM; 291238c8a9a5SSteve French 291338c8a9a5SSteve French req->ImpersonationLevel = IL_IMPERSONATION; 291438c8a9a5SSteve French req->DesiredAccess = cpu_to_le32(oparms->desired_access); 291538c8a9a5SSteve French /* File attributes ignored on open (used in create though) */ 291638c8a9a5SSteve French req->FileAttributes = cpu_to_le32(file_attributes); 291738c8a9a5SSteve French req->ShareAccess = FILE_SHARE_ALL_LE; 291838c8a9a5SSteve French 291938c8a9a5SSteve French req->CreateDisposition = cpu_to_le32(oparms->disposition); 292038c8a9a5SSteve French req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK); 292138c8a9a5SSteve French req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req)); 292238c8a9a5SSteve French 292338c8a9a5SSteve French /* [MS-SMB2] 2.2.13 NameOffset: 292438c8a9a5SSteve French * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of 292538c8a9a5SSteve French * the SMB2 header, the file name includes a prefix that will 292638c8a9a5SSteve French * be processed during DFS name normalization as specified in 292738c8a9a5SSteve French * section 3.3.5.9. Otherwise, the file name is relative to 292838c8a9a5SSteve French * the share that is identified by the TreeId in the SMB2 292938c8a9a5SSteve French * header. 293038c8a9a5SSteve French */ 293138c8a9a5SSteve French if (tcon->share_flags & SHI1005_FLAGS_DFS) { 293238c8a9a5SSteve French int name_len; 293338c8a9a5SSteve French 293438c8a9a5SSteve French req->hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS; 293538c8a9a5SSteve French rc = alloc_path_with_tree_prefix(©_path, ©_size, 293638c8a9a5SSteve French &name_len, 293738c8a9a5SSteve French tcon->tree_name, path); 293838c8a9a5SSteve French if (rc) 293938c8a9a5SSteve French return rc; 294038c8a9a5SSteve French req->NameLength = cpu_to_le16(name_len * 2); 294138c8a9a5SSteve French uni_path_len = copy_size; 294238c8a9a5SSteve French path = copy_path; 294338c8a9a5SSteve French } else { 294438c8a9a5SSteve French uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2; 294538c8a9a5SSteve French /* MUST set path len (NameLength) to 0 opening root of share */ 294638c8a9a5SSteve French req->NameLength = cpu_to_le16(uni_path_len - 2); 294738c8a9a5SSteve French copy_size = round_up(uni_path_len, 8); 294838c8a9a5SSteve French copy_path = kzalloc(copy_size, GFP_KERNEL); 294938c8a9a5SSteve French if (!copy_path) 295038c8a9a5SSteve French return -ENOMEM; 295138c8a9a5SSteve French memcpy((char *)copy_path, (const char *)path, 295238c8a9a5SSteve French uni_path_len); 295338c8a9a5SSteve French uni_path_len = copy_size; 295438c8a9a5SSteve French path = copy_path; 295538c8a9a5SSteve French } 295638c8a9a5SSteve French 295738c8a9a5SSteve French iov[1].iov_len = uni_path_len; 295838c8a9a5SSteve French iov[1].iov_base = path; 295938c8a9a5SSteve French 296038c8a9a5SSteve French if ((!server->oplocks) || (tcon->no_lease)) 296138c8a9a5SSteve French *oplock = SMB2_OPLOCK_LEVEL_NONE; 296238c8a9a5SSteve French 296338c8a9a5SSteve French if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) || 296438c8a9a5SSteve French *oplock == SMB2_OPLOCK_LEVEL_NONE) 296538c8a9a5SSteve French req->RequestedOplockLevel = *oplock; 296638c8a9a5SSteve French else if (!(server->capabilities & SMB2_GLOBAL_CAP_DIRECTORY_LEASING) && 296738c8a9a5SSteve French (oparms->create_options & CREATE_NOT_FILE)) 296838c8a9a5SSteve French req->RequestedOplockLevel = *oplock; /* no srv lease support */ 296938c8a9a5SSteve French else { 297038c8a9a5SSteve French rc = add_lease_context(server, req, iov, &n_iov, 297138c8a9a5SSteve French oparms->fid->lease_key, oplock); 297238c8a9a5SSteve French if (rc) 297338c8a9a5SSteve French return rc; 297438c8a9a5SSteve French } 297538c8a9a5SSteve French 297638c8a9a5SSteve French if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) { 297738c8a9a5SSteve French rc = add_durable_context(iov, &n_iov, oparms, 297838c8a9a5SSteve French tcon->use_persistent); 297938c8a9a5SSteve French if (rc) 298038c8a9a5SSteve French return rc; 298138c8a9a5SSteve French } 298238c8a9a5SSteve French 298338c8a9a5SSteve French if (tcon->posix_extensions) { 298438c8a9a5SSteve French rc = add_posix_context(iov, &n_iov, oparms->mode); 298538c8a9a5SSteve French if (rc) 298638c8a9a5SSteve French return rc; 298738c8a9a5SSteve French } 298838c8a9a5SSteve French 298938c8a9a5SSteve French if (tcon->snapshot_time) { 299038c8a9a5SSteve French cifs_dbg(FYI, "adding snapshot context\n"); 299138c8a9a5SSteve French rc = add_twarp_context(iov, &n_iov, tcon->snapshot_time); 299238c8a9a5SSteve French if (rc) 299338c8a9a5SSteve French return rc; 299438c8a9a5SSteve French } 299538c8a9a5SSteve French 299638c8a9a5SSteve French if ((oparms->disposition != FILE_OPEN) && (oparms->cifs_sb)) { 299738c8a9a5SSteve French bool set_mode; 299838c8a9a5SSteve French bool set_owner; 299938c8a9a5SSteve French 300038c8a9a5SSteve French if ((oparms->cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) && 300138c8a9a5SSteve French (oparms->mode != ACL_NO_MODE)) 300238c8a9a5SSteve French set_mode = true; 300338c8a9a5SSteve French else { 300438c8a9a5SSteve French set_mode = false; 300538c8a9a5SSteve French oparms->mode = ACL_NO_MODE; 300638c8a9a5SSteve French } 300738c8a9a5SSteve French 300838c8a9a5SSteve French if (oparms->cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UID_FROM_ACL) 300938c8a9a5SSteve French set_owner = true; 301038c8a9a5SSteve French else 301138c8a9a5SSteve French set_owner = false; 301238c8a9a5SSteve French 301338c8a9a5SSteve French if (set_owner | set_mode) { 301438c8a9a5SSteve French cifs_dbg(FYI, "add sd with mode 0x%x\n", oparms->mode); 301538c8a9a5SSteve French rc = add_sd_context(iov, &n_iov, oparms->mode, set_owner); 301638c8a9a5SSteve French if (rc) 301738c8a9a5SSteve French return rc; 301838c8a9a5SSteve French } 301938c8a9a5SSteve French } 302038c8a9a5SSteve French 302138c8a9a5SSteve French add_query_id_context(iov, &n_iov); 302238c8a9a5SSteve French 302338c8a9a5SSteve French if (n_iov > 2) { 302438c8a9a5SSteve French /* 302538c8a9a5SSteve French * We have create contexts behind iov[1] (the file 302638c8a9a5SSteve French * name), point at them from the main create request 302738c8a9a5SSteve French */ 302838c8a9a5SSteve French req->CreateContextsOffset = cpu_to_le32( 302938c8a9a5SSteve French sizeof(struct smb2_create_req) + 303038c8a9a5SSteve French iov[1].iov_len); 303138c8a9a5SSteve French req->CreateContextsLength = 0; 303238c8a9a5SSteve French 303338c8a9a5SSteve French for (unsigned int i = 2; i < (n_iov-1); i++) { 303438c8a9a5SSteve French struct kvec *v = &iov[i]; 303538c8a9a5SSteve French size_t len = v->iov_len; 303638c8a9a5SSteve French struct create_context *cctx = 303738c8a9a5SSteve French (struct create_context *)v->iov_base; 303838c8a9a5SSteve French 303938c8a9a5SSteve French cctx->Next = cpu_to_le32(len); 304038c8a9a5SSteve French le32_add_cpu(&req->CreateContextsLength, len); 304138c8a9a5SSteve French } 304238c8a9a5SSteve French le32_add_cpu(&req->CreateContextsLength, 304338c8a9a5SSteve French iov[n_iov-1].iov_len); 304438c8a9a5SSteve French } 304538c8a9a5SSteve French 304638c8a9a5SSteve French rqst->rq_nvec = n_iov; 304738c8a9a5SSteve French return 0; 304838c8a9a5SSteve French } 304938c8a9a5SSteve French 305038c8a9a5SSteve French /* rq_iov[0] is the request and is released by cifs_small_buf_release(). 305138c8a9a5SSteve French * All other vectors are freed by kfree(). 305238c8a9a5SSteve French */ 305338c8a9a5SSteve French void 305438c8a9a5SSteve French SMB2_open_free(struct smb_rqst *rqst) 305538c8a9a5SSteve French { 305638c8a9a5SSteve French int i; 305738c8a9a5SSteve French 305838c8a9a5SSteve French if (rqst && rqst->rq_iov) { 305938c8a9a5SSteve French cifs_small_buf_release(rqst->rq_iov[0].iov_base); 306038c8a9a5SSteve French for (i = 1; i < rqst->rq_nvec; i++) 306138c8a9a5SSteve French if (rqst->rq_iov[i].iov_base != smb2_padding) 306238c8a9a5SSteve French kfree(rqst->rq_iov[i].iov_base); 306338c8a9a5SSteve French } 306438c8a9a5SSteve French } 306538c8a9a5SSteve French 306638c8a9a5SSteve French int 306738c8a9a5SSteve French SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path, 306838c8a9a5SSteve French __u8 *oplock, struct smb2_file_all_info *buf, 306938c8a9a5SSteve French struct create_posix_rsp *posix, 307038c8a9a5SSteve French struct kvec *err_iov, int *buftype) 307138c8a9a5SSteve French { 307238c8a9a5SSteve French struct smb_rqst rqst; 307338c8a9a5SSteve French struct smb2_create_rsp *rsp = NULL; 307438c8a9a5SSteve French struct cifs_tcon *tcon = oparms->tcon; 307538c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 307638c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 307738c8a9a5SSteve French struct kvec iov[SMB2_CREATE_IOV_SIZE]; 307838c8a9a5SSteve French struct kvec rsp_iov = {NULL, 0}; 307938c8a9a5SSteve French int resp_buftype = CIFS_NO_BUFFER; 308038c8a9a5SSteve French int rc = 0; 308138c8a9a5SSteve French int flags = 0; 308238c8a9a5SSteve French 308338c8a9a5SSteve French cifs_dbg(FYI, "create/open\n"); 308438c8a9a5SSteve French if (!ses || !server) 308538c8a9a5SSteve French return -EIO; 308638c8a9a5SSteve French 308738c8a9a5SSteve French if (smb3_encryption_required(tcon)) 308838c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 308938c8a9a5SSteve French 309038c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 309138c8a9a5SSteve French memset(&iov, 0, sizeof(iov)); 309238c8a9a5SSteve French rqst.rq_iov = iov; 309338c8a9a5SSteve French rqst.rq_nvec = SMB2_CREATE_IOV_SIZE; 309438c8a9a5SSteve French 309538c8a9a5SSteve French rc = SMB2_open_init(tcon, server, 309638c8a9a5SSteve French &rqst, oplock, oparms, path); 309738c8a9a5SSteve French if (rc) 309838c8a9a5SSteve French goto creat_exit; 309938c8a9a5SSteve French 310038c8a9a5SSteve French trace_smb3_open_enter(xid, tcon->tid, tcon->ses->Suid, oparms->path, 310138c8a9a5SSteve French oparms->create_options, oparms->desired_access); 310238c8a9a5SSteve French 310338c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 310438c8a9a5SSteve French &rqst, &resp_buftype, flags, 310538c8a9a5SSteve French &rsp_iov); 310638c8a9a5SSteve French rsp = (struct smb2_create_rsp *)rsp_iov.iov_base; 310738c8a9a5SSteve French 310838c8a9a5SSteve French if (rc != 0) { 310938c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_CREATE_HE); 311038c8a9a5SSteve French if (err_iov && rsp) { 311138c8a9a5SSteve French *err_iov = rsp_iov; 311238c8a9a5SSteve French *buftype = resp_buftype; 311338c8a9a5SSteve French resp_buftype = CIFS_NO_BUFFER; 311438c8a9a5SSteve French rsp = NULL; 311538c8a9a5SSteve French } 311638c8a9a5SSteve French trace_smb3_open_err(xid, tcon->tid, ses->Suid, 311738c8a9a5SSteve French oparms->create_options, oparms->desired_access, rc); 311838c8a9a5SSteve French if (rc == -EREMCHG) { 311938c8a9a5SSteve French pr_warn_once("server share %s deleted\n", 312038c8a9a5SSteve French tcon->tree_name); 312138c8a9a5SSteve French tcon->need_reconnect = true; 312238c8a9a5SSteve French } 312338c8a9a5SSteve French goto creat_exit; 312438c8a9a5SSteve French } else if (rsp == NULL) /* unlikely to happen, but safer to check */ 312538c8a9a5SSteve French goto creat_exit; 312638c8a9a5SSteve French else 312738c8a9a5SSteve French trace_smb3_open_done(xid, rsp->PersistentFileId, tcon->tid, ses->Suid, 312838c8a9a5SSteve French oparms->create_options, oparms->desired_access); 312938c8a9a5SSteve French 313038c8a9a5SSteve French atomic_inc(&tcon->num_remote_opens); 313138c8a9a5SSteve French oparms->fid->persistent_fid = rsp->PersistentFileId; 313238c8a9a5SSteve French oparms->fid->volatile_fid = rsp->VolatileFileId; 313338c8a9a5SSteve French oparms->fid->access = oparms->desired_access; 313438c8a9a5SSteve French #ifdef CONFIG_CIFS_DEBUG2 313538c8a9a5SSteve French oparms->fid->mid = le64_to_cpu(rsp->hdr.MessageId); 313638c8a9a5SSteve French #endif /* CIFS_DEBUG2 */ 313738c8a9a5SSteve French 313838c8a9a5SSteve French if (buf) { 313938c8a9a5SSteve French buf->CreationTime = rsp->CreationTime; 314038c8a9a5SSteve French buf->LastAccessTime = rsp->LastAccessTime; 314138c8a9a5SSteve French buf->LastWriteTime = rsp->LastWriteTime; 314238c8a9a5SSteve French buf->ChangeTime = rsp->ChangeTime; 314338c8a9a5SSteve French buf->AllocationSize = rsp->AllocationSize; 314438c8a9a5SSteve French buf->EndOfFile = rsp->EndofFile; 314538c8a9a5SSteve French buf->Attributes = rsp->FileAttributes; 314638c8a9a5SSteve French buf->NumberOfLinks = cpu_to_le32(1); 314738c8a9a5SSteve French buf->DeletePending = 0; 314838c8a9a5SSteve French } 314938c8a9a5SSteve French 315038c8a9a5SSteve French 315117a0f64cSPaulo Alcantara rc = smb2_parse_contexts(server, &rsp_iov, &oparms->fid->epoch, 315238c8a9a5SSteve French oparms->fid->lease_key, oplock, buf, posix); 315338c8a9a5SSteve French creat_exit: 315438c8a9a5SSteve French SMB2_open_free(&rqst); 315538c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp); 315638c8a9a5SSteve French return rc; 315738c8a9a5SSteve French } 315838c8a9a5SSteve French 315938c8a9a5SSteve French int 316038c8a9a5SSteve French SMB2_ioctl_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server, 316138c8a9a5SSteve French struct smb_rqst *rqst, 316238c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, u32 opcode, 316338c8a9a5SSteve French char *in_data, u32 indatalen, 316438c8a9a5SSteve French __u32 max_response_size) 316538c8a9a5SSteve French { 316638c8a9a5SSteve French struct smb2_ioctl_req *req; 316738c8a9a5SSteve French struct kvec *iov = rqst->rq_iov; 316838c8a9a5SSteve French unsigned int total_len; 316938c8a9a5SSteve French int rc; 317038c8a9a5SSteve French char *in_data_buf; 317138c8a9a5SSteve French 317238c8a9a5SSteve French rc = smb2_ioctl_req_init(opcode, tcon, server, 317338c8a9a5SSteve French (void **) &req, &total_len); 317438c8a9a5SSteve French if (rc) 317538c8a9a5SSteve French return rc; 317638c8a9a5SSteve French 317738c8a9a5SSteve French if (indatalen) { 317838c8a9a5SSteve French /* 317938c8a9a5SSteve French * indatalen is usually small at a couple of bytes max, so 318038c8a9a5SSteve French * just allocate through generic pool 318138c8a9a5SSteve French */ 318238c8a9a5SSteve French in_data_buf = kmemdup(in_data, indatalen, GFP_NOFS); 318338c8a9a5SSteve French if (!in_data_buf) { 318438c8a9a5SSteve French cifs_small_buf_release(req); 318538c8a9a5SSteve French return -ENOMEM; 318638c8a9a5SSteve French } 318738c8a9a5SSteve French } 318838c8a9a5SSteve French 318938c8a9a5SSteve French req->CtlCode = cpu_to_le32(opcode); 319038c8a9a5SSteve French req->PersistentFileId = persistent_fid; 319138c8a9a5SSteve French req->VolatileFileId = volatile_fid; 319238c8a9a5SSteve French 319338c8a9a5SSteve French iov[0].iov_base = (char *)req; 319438c8a9a5SSteve French /* 319538c8a9a5SSteve French * If no input data, the size of ioctl struct in 319638c8a9a5SSteve French * protocol spec still includes a 1 byte data buffer, 319738c8a9a5SSteve French * but if input data passed to ioctl, we do not 319838c8a9a5SSteve French * want to double count this, so we do not send 319938c8a9a5SSteve French * the dummy one byte of data in iovec[0] if sending 320038c8a9a5SSteve French * input data (in iovec[1]). 320138c8a9a5SSteve French */ 320238c8a9a5SSteve French if (indatalen) { 320338c8a9a5SSteve French req->InputCount = cpu_to_le32(indatalen); 320438c8a9a5SSteve French /* do not set InputOffset if no input data */ 320538c8a9a5SSteve French req->InputOffset = 320638c8a9a5SSteve French cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer)); 320738c8a9a5SSteve French rqst->rq_nvec = 2; 320838c8a9a5SSteve French iov[0].iov_len = total_len - 1; 320938c8a9a5SSteve French iov[1].iov_base = in_data_buf; 321038c8a9a5SSteve French iov[1].iov_len = indatalen; 321138c8a9a5SSteve French } else { 321238c8a9a5SSteve French rqst->rq_nvec = 1; 321338c8a9a5SSteve French iov[0].iov_len = total_len; 321438c8a9a5SSteve French } 321538c8a9a5SSteve French 321638c8a9a5SSteve French req->OutputOffset = 0; 321738c8a9a5SSteve French req->OutputCount = 0; /* MBZ */ 321838c8a9a5SSteve French 321938c8a9a5SSteve French /* 322038c8a9a5SSteve French * In most cases max_response_size is set to 16K (CIFSMaxBufSize) 322138c8a9a5SSteve French * We Could increase default MaxOutputResponse, but that could require 322238c8a9a5SSteve French * more credits. Windows typically sets this smaller, but for some 322338c8a9a5SSteve French * ioctls it may be useful to allow server to send more. No point 322438c8a9a5SSteve French * limiting what the server can send as long as fits in one credit 322538c8a9a5SSteve French * We can not handle more than CIFS_MAX_BUF_SIZE yet but may want 322638c8a9a5SSteve French * to increase this limit up in the future. 322738c8a9a5SSteve French * Note that for snapshot queries that servers like Azure expect that 322838c8a9a5SSteve French * the first query be minimal size (and just used to get the number/size 322938c8a9a5SSteve French * of previous versions) so response size must be specified as EXACTLY 323038c8a9a5SSteve French * sizeof(struct snapshot_array) which is 16 when rounded up to multiple 323138c8a9a5SSteve French * of eight bytes. Currently that is the only case where we set max 323238c8a9a5SSteve French * response size smaller. 323338c8a9a5SSteve French */ 323438c8a9a5SSteve French req->MaxOutputResponse = cpu_to_le32(max_response_size); 323538c8a9a5SSteve French req->hdr.CreditCharge = 323638c8a9a5SSteve French cpu_to_le16(DIV_ROUND_UP(max(indatalen, max_response_size), 323738c8a9a5SSteve French SMB2_MAX_BUFFER_SIZE)); 323838c8a9a5SSteve French /* always an FSCTL (for now) */ 323938c8a9a5SSteve French req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL); 324038c8a9a5SSteve French 324138c8a9a5SSteve French /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */ 324238c8a9a5SSteve French if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO) 324338c8a9a5SSteve French req->hdr.Flags |= SMB2_FLAGS_SIGNED; 324438c8a9a5SSteve French 324538c8a9a5SSteve French return 0; 324638c8a9a5SSteve French } 324738c8a9a5SSteve French 324838c8a9a5SSteve French void 324938c8a9a5SSteve French SMB2_ioctl_free(struct smb_rqst *rqst) 325038c8a9a5SSteve French { 325138c8a9a5SSteve French int i; 32522c75426cSSteve French 325338c8a9a5SSteve French if (rqst && rqst->rq_iov) { 325438c8a9a5SSteve French cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */ 325538c8a9a5SSteve French for (i = 1; i < rqst->rq_nvec; i++) 325638c8a9a5SSteve French if (rqst->rq_iov[i].iov_base != smb2_padding) 325738c8a9a5SSteve French kfree(rqst->rq_iov[i].iov_base); 325838c8a9a5SSteve French } 325938c8a9a5SSteve French } 326038c8a9a5SSteve French 326138c8a9a5SSteve French 326238c8a9a5SSteve French /* 326338c8a9a5SSteve French * SMB2 IOCTL is used for both IOCTLs and FSCTLs 326438c8a9a5SSteve French */ 326538c8a9a5SSteve French int 326638c8a9a5SSteve French SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, 326738c8a9a5SSteve French u64 volatile_fid, u32 opcode, char *in_data, u32 indatalen, 326838c8a9a5SSteve French u32 max_out_data_len, char **out_data, 326938c8a9a5SSteve French u32 *plen /* returned data len */) 327038c8a9a5SSteve French { 327138c8a9a5SSteve French struct smb_rqst rqst; 327238c8a9a5SSteve French struct smb2_ioctl_rsp *rsp = NULL; 327338c8a9a5SSteve French struct cifs_ses *ses; 327438c8a9a5SSteve French struct TCP_Server_Info *server; 327538c8a9a5SSteve French struct kvec iov[SMB2_IOCTL_IOV_SIZE]; 327638c8a9a5SSteve French struct kvec rsp_iov = {NULL, 0}; 327738c8a9a5SSteve French int resp_buftype = CIFS_NO_BUFFER; 327838c8a9a5SSteve French int rc = 0; 327938c8a9a5SSteve French int flags = 0; 328038c8a9a5SSteve French 328138c8a9a5SSteve French cifs_dbg(FYI, "SMB2 IOCTL\n"); 328238c8a9a5SSteve French 328338c8a9a5SSteve French if (out_data != NULL) 328438c8a9a5SSteve French *out_data = NULL; 328538c8a9a5SSteve French 328638c8a9a5SSteve French /* zero out returned data len, in case of error */ 328738c8a9a5SSteve French if (plen) 328838c8a9a5SSteve French *plen = 0; 328938c8a9a5SSteve French 329038c8a9a5SSteve French if (!tcon) 329138c8a9a5SSteve French return -EIO; 329238c8a9a5SSteve French 329338c8a9a5SSteve French ses = tcon->ses; 329438c8a9a5SSteve French if (!ses) 329538c8a9a5SSteve French return -EIO; 329638c8a9a5SSteve French 329738c8a9a5SSteve French server = cifs_pick_channel(ses); 329838c8a9a5SSteve French if (!server) 329938c8a9a5SSteve French return -EIO; 330038c8a9a5SSteve French 330138c8a9a5SSteve French if (smb3_encryption_required(tcon)) 330238c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 330338c8a9a5SSteve French 330438c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 330538c8a9a5SSteve French memset(&iov, 0, sizeof(iov)); 330638c8a9a5SSteve French rqst.rq_iov = iov; 330738c8a9a5SSteve French rqst.rq_nvec = SMB2_IOCTL_IOV_SIZE; 330838c8a9a5SSteve French 330938c8a9a5SSteve French rc = SMB2_ioctl_init(tcon, server, 331038c8a9a5SSteve French &rqst, persistent_fid, volatile_fid, opcode, 331138c8a9a5SSteve French in_data, indatalen, max_out_data_len); 331238c8a9a5SSteve French if (rc) 331338c8a9a5SSteve French goto ioctl_exit; 331438c8a9a5SSteve French 331538c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 331638c8a9a5SSteve French &rqst, &resp_buftype, flags, 331738c8a9a5SSteve French &rsp_iov); 331838c8a9a5SSteve French rsp = (struct smb2_ioctl_rsp *)rsp_iov.iov_base; 331938c8a9a5SSteve French 332038c8a9a5SSteve French if (rc != 0) 332138c8a9a5SSteve French trace_smb3_fsctl_err(xid, persistent_fid, tcon->tid, 332238c8a9a5SSteve French ses->Suid, 0, opcode, rc); 332338c8a9a5SSteve French 332438c8a9a5SSteve French if ((rc != 0) && (rc != -EINVAL) && (rc != -E2BIG)) { 332538c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE); 332638c8a9a5SSteve French goto ioctl_exit; 332738c8a9a5SSteve French } else if (rc == -EINVAL) { 332838c8a9a5SSteve French if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) && 332938c8a9a5SSteve French (opcode != FSCTL_SRV_COPYCHUNK)) { 333038c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE); 333138c8a9a5SSteve French goto ioctl_exit; 333238c8a9a5SSteve French } 333338c8a9a5SSteve French } else if (rc == -E2BIG) { 333438c8a9a5SSteve French if (opcode != FSCTL_QUERY_ALLOCATED_RANGES) { 333538c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE); 333638c8a9a5SSteve French goto ioctl_exit; 333738c8a9a5SSteve French } 333838c8a9a5SSteve French } 333938c8a9a5SSteve French 334038c8a9a5SSteve French /* check if caller wants to look at return data or just return rc */ 334138c8a9a5SSteve French if ((plen == NULL) || (out_data == NULL)) 334238c8a9a5SSteve French goto ioctl_exit; 334338c8a9a5SSteve French 334438c8a9a5SSteve French /* 334538c8a9a5SSteve French * Although unlikely to be possible for rsp to be null and rc not set, 334638c8a9a5SSteve French * adding check below is slightly safer long term (and quiets Coverity 334738c8a9a5SSteve French * warning) 334838c8a9a5SSteve French */ 334938c8a9a5SSteve French if (rsp == NULL) { 335038c8a9a5SSteve French rc = -EIO; 335138c8a9a5SSteve French goto ioctl_exit; 335238c8a9a5SSteve French } 335338c8a9a5SSteve French 335438c8a9a5SSteve French *plen = le32_to_cpu(rsp->OutputCount); 335538c8a9a5SSteve French 335638c8a9a5SSteve French /* We check for obvious errors in the output buffer length and offset */ 335738c8a9a5SSteve French if (*plen == 0) 335838c8a9a5SSteve French goto ioctl_exit; /* server returned no data */ 335938c8a9a5SSteve French else if (*plen > rsp_iov.iov_len || *plen > 0xFF00) { 336038c8a9a5SSteve French cifs_tcon_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen); 336138c8a9a5SSteve French *plen = 0; 336238c8a9a5SSteve French rc = -EIO; 336338c8a9a5SSteve French goto ioctl_exit; 336438c8a9a5SSteve French } 336538c8a9a5SSteve French 336638c8a9a5SSteve French if (rsp_iov.iov_len - *plen < le32_to_cpu(rsp->OutputOffset)) { 336738c8a9a5SSteve French cifs_tcon_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen, 336838c8a9a5SSteve French le32_to_cpu(rsp->OutputOffset)); 336938c8a9a5SSteve French *plen = 0; 337038c8a9a5SSteve French rc = -EIO; 337138c8a9a5SSteve French goto ioctl_exit; 337238c8a9a5SSteve French } 337338c8a9a5SSteve French 337438c8a9a5SSteve French *out_data = kmemdup((char *)rsp + le32_to_cpu(rsp->OutputOffset), 337538c8a9a5SSteve French *plen, GFP_KERNEL); 337638c8a9a5SSteve French if (*out_data == NULL) { 337738c8a9a5SSteve French rc = -ENOMEM; 337838c8a9a5SSteve French goto ioctl_exit; 337938c8a9a5SSteve French } 338038c8a9a5SSteve French 338138c8a9a5SSteve French ioctl_exit: 338238c8a9a5SSteve French SMB2_ioctl_free(&rqst); 338338c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp); 338438c8a9a5SSteve French return rc; 338538c8a9a5SSteve French } 338638c8a9a5SSteve French 338738c8a9a5SSteve French /* 338838c8a9a5SSteve French * Individual callers to ioctl worker function follow 338938c8a9a5SSteve French */ 339038c8a9a5SSteve French 339138c8a9a5SSteve French int 339238c8a9a5SSteve French SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, 339338c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid) 339438c8a9a5SSteve French { 339538c8a9a5SSteve French int rc; 339638c8a9a5SSteve French struct compress_ioctl fsctl_input; 339738c8a9a5SSteve French char *ret_data = NULL; 339838c8a9a5SSteve French 339938c8a9a5SSteve French fsctl_input.CompressionState = 340038c8a9a5SSteve French cpu_to_le16(COMPRESSION_FORMAT_DEFAULT); 340138c8a9a5SSteve French 340238c8a9a5SSteve French rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid, 340338c8a9a5SSteve French FSCTL_SET_COMPRESSION, 340438c8a9a5SSteve French (char *)&fsctl_input /* data input */, 340538c8a9a5SSteve French 2 /* in data len */, CIFSMaxBufSize /* max out data */, 340638c8a9a5SSteve French &ret_data /* out data */, NULL); 340738c8a9a5SSteve French 340838c8a9a5SSteve French cifs_dbg(FYI, "set compression rc %d\n", rc); 340938c8a9a5SSteve French 341038c8a9a5SSteve French return rc; 341138c8a9a5SSteve French } 341238c8a9a5SSteve French 341338c8a9a5SSteve French int 341438c8a9a5SSteve French SMB2_close_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server, 341538c8a9a5SSteve French struct smb_rqst *rqst, 341638c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, bool query_attrs) 341738c8a9a5SSteve French { 341838c8a9a5SSteve French struct smb2_close_req *req; 341938c8a9a5SSteve French struct kvec *iov = rqst->rq_iov; 342038c8a9a5SSteve French unsigned int total_len; 342138c8a9a5SSteve French int rc; 342238c8a9a5SSteve French 342338c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_CLOSE, tcon, server, 342438c8a9a5SSteve French (void **) &req, &total_len); 342538c8a9a5SSteve French if (rc) 342638c8a9a5SSteve French return rc; 342738c8a9a5SSteve French 342838c8a9a5SSteve French req->PersistentFileId = persistent_fid; 342938c8a9a5SSteve French req->VolatileFileId = volatile_fid; 343038c8a9a5SSteve French if (query_attrs) 343138c8a9a5SSteve French req->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB; 343238c8a9a5SSteve French else 343338c8a9a5SSteve French req->Flags = 0; 343438c8a9a5SSteve French iov[0].iov_base = (char *)req; 343538c8a9a5SSteve French iov[0].iov_len = total_len; 343638c8a9a5SSteve French 343738c8a9a5SSteve French return 0; 343838c8a9a5SSteve French } 343938c8a9a5SSteve French 344038c8a9a5SSteve French void 344138c8a9a5SSteve French SMB2_close_free(struct smb_rqst *rqst) 344238c8a9a5SSteve French { 344338c8a9a5SSteve French if (rqst && rqst->rq_iov) 344438c8a9a5SSteve French cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */ 344538c8a9a5SSteve French } 344638c8a9a5SSteve French 344738c8a9a5SSteve French int 344838c8a9a5SSteve French __SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, 344938c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, 345038c8a9a5SSteve French struct smb2_file_network_open_info *pbuf) 345138c8a9a5SSteve French { 345238c8a9a5SSteve French struct smb_rqst rqst; 345338c8a9a5SSteve French struct smb2_close_rsp *rsp = NULL; 345438c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 345538c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 345638c8a9a5SSteve French struct kvec iov[1]; 345738c8a9a5SSteve French struct kvec rsp_iov; 345838c8a9a5SSteve French int resp_buftype = CIFS_NO_BUFFER; 345938c8a9a5SSteve French int rc = 0; 346038c8a9a5SSteve French int flags = 0; 346138c8a9a5SSteve French bool query_attrs = false; 346238c8a9a5SSteve French 346338c8a9a5SSteve French cifs_dbg(FYI, "Close\n"); 346438c8a9a5SSteve French 346538c8a9a5SSteve French if (!ses || !server) 346638c8a9a5SSteve French return -EIO; 346738c8a9a5SSteve French 346838c8a9a5SSteve French if (smb3_encryption_required(tcon)) 346938c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 347038c8a9a5SSteve French 347138c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 347238c8a9a5SSteve French memset(&iov, 0, sizeof(iov)); 347338c8a9a5SSteve French rqst.rq_iov = iov; 347438c8a9a5SSteve French rqst.rq_nvec = 1; 347538c8a9a5SSteve French 347638c8a9a5SSteve French /* check if need to ask server to return timestamps in close response */ 347738c8a9a5SSteve French if (pbuf) 347838c8a9a5SSteve French query_attrs = true; 347938c8a9a5SSteve French 348038c8a9a5SSteve French trace_smb3_close_enter(xid, persistent_fid, tcon->tid, ses->Suid); 348138c8a9a5SSteve French rc = SMB2_close_init(tcon, server, 348238c8a9a5SSteve French &rqst, persistent_fid, volatile_fid, 348338c8a9a5SSteve French query_attrs); 348438c8a9a5SSteve French if (rc) 348538c8a9a5SSteve French goto close_exit; 348638c8a9a5SSteve French 348738c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 348838c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 348938c8a9a5SSteve French rsp = (struct smb2_close_rsp *)rsp_iov.iov_base; 349038c8a9a5SSteve French 349138c8a9a5SSteve French if (rc != 0) { 349238c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE); 349338c8a9a5SSteve French trace_smb3_close_err(xid, persistent_fid, tcon->tid, ses->Suid, 349438c8a9a5SSteve French rc); 349538c8a9a5SSteve French goto close_exit; 349638c8a9a5SSteve French } else { 349738c8a9a5SSteve French trace_smb3_close_done(xid, persistent_fid, tcon->tid, 349838c8a9a5SSteve French ses->Suid); 349938c8a9a5SSteve French if (pbuf) 35005ca51814SDmitry Antipov memcpy(&pbuf->network_open_info, 35015ca51814SDmitry Antipov &rsp->network_open_info, 35025ca51814SDmitry Antipov sizeof(pbuf->network_open_info)); 350338c8a9a5SSteve French } 350438c8a9a5SSteve French 350538c8a9a5SSteve French atomic_dec(&tcon->num_remote_opens); 350638c8a9a5SSteve French close_exit: 350738c8a9a5SSteve French SMB2_close_free(&rqst); 350838c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp); 350938c8a9a5SSteve French 351038c8a9a5SSteve French /* retry close in a worker thread if this one is interrupted */ 351138c8a9a5SSteve French if (is_interrupt_error(rc)) { 351238c8a9a5SSteve French int tmp_rc; 351338c8a9a5SSteve French 351438c8a9a5SSteve French tmp_rc = smb2_handle_cancelled_close(tcon, persistent_fid, 351538c8a9a5SSteve French volatile_fid); 351638c8a9a5SSteve French if (tmp_rc) 351738c8a9a5SSteve French cifs_dbg(VFS, "handle cancelled close fid 0x%llx returned error %d\n", 351838c8a9a5SSteve French persistent_fid, tmp_rc); 351938c8a9a5SSteve French } 352038c8a9a5SSteve French return rc; 352138c8a9a5SSteve French } 352238c8a9a5SSteve French 352338c8a9a5SSteve French int 352438c8a9a5SSteve French SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, 352538c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid) 352638c8a9a5SSteve French { 352738c8a9a5SSteve French return __SMB2_close(xid, tcon, persistent_fid, volatile_fid, NULL); 352838c8a9a5SSteve French } 352938c8a9a5SSteve French 353038c8a9a5SSteve French int 353138c8a9a5SSteve French smb2_validate_iov(unsigned int offset, unsigned int buffer_length, 353238c8a9a5SSteve French struct kvec *iov, unsigned int min_buf_size) 353338c8a9a5SSteve French { 353438c8a9a5SSteve French unsigned int smb_len = iov->iov_len; 353538c8a9a5SSteve French char *end_of_smb = smb_len + (char *)iov->iov_base; 353638c8a9a5SSteve French char *begin_of_buf = offset + (char *)iov->iov_base; 353738c8a9a5SSteve French char *end_of_buf = begin_of_buf + buffer_length; 353838c8a9a5SSteve French 353938c8a9a5SSteve French 354038c8a9a5SSteve French if (buffer_length < min_buf_size) { 354138c8a9a5SSteve French cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n", 354238c8a9a5SSteve French buffer_length, min_buf_size); 354338c8a9a5SSteve French return -EINVAL; 354438c8a9a5SSteve French } 354538c8a9a5SSteve French 354638c8a9a5SSteve French /* check if beyond RFC1001 maximum length */ 354738c8a9a5SSteve French if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) { 354838c8a9a5SSteve French cifs_dbg(VFS, "buffer length %d or smb length %d too large\n", 354938c8a9a5SSteve French buffer_length, smb_len); 355038c8a9a5SSteve French return -EINVAL; 355138c8a9a5SSteve French } 355238c8a9a5SSteve French 355338c8a9a5SSteve French if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) { 355438c8a9a5SSteve French cifs_dbg(VFS, "Invalid server response, bad offset to data\n"); 355538c8a9a5SSteve French return -EINVAL; 355638c8a9a5SSteve French } 355738c8a9a5SSteve French 355838c8a9a5SSteve French return 0; 355938c8a9a5SSteve French } 356038c8a9a5SSteve French 356138c8a9a5SSteve French /* 356238c8a9a5SSteve French * If SMB buffer fields are valid, copy into temporary buffer to hold result. 356338c8a9a5SSteve French * Caller must free buffer. 356438c8a9a5SSteve French */ 356538c8a9a5SSteve French int 356638c8a9a5SSteve French smb2_validate_and_copy_iov(unsigned int offset, unsigned int buffer_length, 356738c8a9a5SSteve French struct kvec *iov, unsigned int minbufsize, 356838c8a9a5SSteve French char *data) 356938c8a9a5SSteve French { 357038c8a9a5SSteve French char *begin_of_buf = offset + (char *)iov->iov_base; 357138c8a9a5SSteve French int rc; 357238c8a9a5SSteve French 357338c8a9a5SSteve French if (!data) 357438c8a9a5SSteve French return -EINVAL; 357538c8a9a5SSteve French 357638c8a9a5SSteve French rc = smb2_validate_iov(offset, buffer_length, iov, minbufsize); 357738c8a9a5SSteve French if (rc) 357838c8a9a5SSteve French return rc; 357938c8a9a5SSteve French 358038c8a9a5SSteve French memcpy(data, begin_of_buf, minbufsize); 358138c8a9a5SSteve French 358238c8a9a5SSteve French return 0; 358338c8a9a5SSteve French } 358438c8a9a5SSteve French 358538c8a9a5SSteve French int 358638c8a9a5SSteve French SMB2_query_info_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server, 358738c8a9a5SSteve French struct smb_rqst *rqst, 358838c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, 358938c8a9a5SSteve French u8 info_class, u8 info_type, u32 additional_info, 359038c8a9a5SSteve French size_t output_len, size_t input_len, void *input) 359138c8a9a5SSteve French { 359238c8a9a5SSteve French struct smb2_query_info_req *req; 359338c8a9a5SSteve French struct kvec *iov = rqst->rq_iov; 359438c8a9a5SSteve French unsigned int total_len; 35953b5f0d0aSPaulo Alcantara size_t len; 359638c8a9a5SSteve French int rc; 359738c8a9a5SSteve French 35983b5f0d0aSPaulo Alcantara if (unlikely(check_add_overflow(input_len, sizeof(*req), &len) || 35993b5f0d0aSPaulo Alcantara len > CIFSMaxBufSize)) 36003b5f0d0aSPaulo Alcantara return -EINVAL; 36013b5f0d0aSPaulo Alcantara 360238c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, server, 360338c8a9a5SSteve French (void **) &req, &total_len); 360438c8a9a5SSteve French if (rc) 360538c8a9a5SSteve French return rc; 360638c8a9a5SSteve French 360738c8a9a5SSteve French req->InfoType = info_type; 360838c8a9a5SSteve French req->FileInfoClass = info_class; 360938c8a9a5SSteve French req->PersistentFileId = persistent_fid; 361038c8a9a5SSteve French req->VolatileFileId = volatile_fid; 361138c8a9a5SSteve French req->AdditionalInformation = cpu_to_le32(additional_info); 361238c8a9a5SSteve French 361338c8a9a5SSteve French req->OutputBufferLength = cpu_to_le32(output_len); 361438c8a9a5SSteve French if (input_len) { 361538c8a9a5SSteve French req->InputBufferLength = cpu_to_le32(input_len); 361638c8a9a5SSteve French /* total_len for smb query request never close to le16 max */ 361738c8a9a5SSteve French req->InputBufferOffset = cpu_to_le16(total_len - 1); 361838c8a9a5SSteve French memcpy(req->Buffer, input, input_len); 361938c8a9a5SSteve French } 362038c8a9a5SSteve French 362138c8a9a5SSteve French iov[0].iov_base = (char *)req; 362238c8a9a5SSteve French /* 1 for Buffer */ 36233b5f0d0aSPaulo Alcantara iov[0].iov_len = len; 362438c8a9a5SSteve French return 0; 362538c8a9a5SSteve French } 362638c8a9a5SSteve French 362738c8a9a5SSteve French void 362838c8a9a5SSteve French SMB2_query_info_free(struct smb_rqst *rqst) 362938c8a9a5SSteve French { 363038c8a9a5SSteve French if (rqst && rqst->rq_iov) 36313b5f0d0aSPaulo Alcantara cifs_buf_release(rqst->rq_iov[0].iov_base); /* request */ 363238c8a9a5SSteve French } 363338c8a9a5SSteve French 363438c8a9a5SSteve French static int 363538c8a9a5SSteve French query_info(const unsigned int xid, struct cifs_tcon *tcon, 363638c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, u8 info_class, u8 info_type, 363738c8a9a5SSteve French u32 additional_info, size_t output_len, size_t min_len, void **data, 363838c8a9a5SSteve French u32 *dlen) 363938c8a9a5SSteve French { 364038c8a9a5SSteve French struct smb_rqst rqst; 364138c8a9a5SSteve French struct smb2_query_info_rsp *rsp = NULL; 364238c8a9a5SSteve French struct kvec iov[1]; 364338c8a9a5SSteve French struct kvec rsp_iov; 364438c8a9a5SSteve French int rc = 0; 364538c8a9a5SSteve French int resp_buftype = CIFS_NO_BUFFER; 364638c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 364738c8a9a5SSteve French struct TCP_Server_Info *server; 364838c8a9a5SSteve French int flags = 0; 364938c8a9a5SSteve French bool allocated = false; 365038c8a9a5SSteve French 365138c8a9a5SSteve French cifs_dbg(FYI, "Query Info\n"); 365238c8a9a5SSteve French 365338c8a9a5SSteve French if (!ses) 365438c8a9a5SSteve French return -EIO; 365538c8a9a5SSteve French server = cifs_pick_channel(ses); 365638c8a9a5SSteve French if (!server) 365738c8a9a5SSteve French return -EIO; 365838c8a9a5SSteve French 365938c8a9a5SSteve French if (smb3_encryption_required(tcon)) 366038c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 366138c8a9a5SSteve French 366238c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 366338c8a9a5SSteve French memset(&iov, 0, sizeof(iov)); 366438c8a9a5SSteve French rqst.rq_iov = iov; 366538c8a9a5SSteve French rqst.rq_nvec = 1; 366638c8a9a5SSteve French 366738c8a9a5SSteve French rc = SMB2_query_info_init(tcon, server, 366838c8a9a5SSteve French &rqst, persistent_fid, volatile_fid, 366938c8a9a5SSteve French info_class, info_type, additional_info, 367038c8a9a5SSteve French output_len, 0, NULL); 367138c8a9a5SSteve French if (rc) 367238c8a9a5SSteve French goto qinf_exit; 367338c8a9a5SSteve French 367438c8a9a5SSteve French trace_smb3_query_info_enter(xid, persistent_fid, tcon->tid, 367538c8a9a5SSteve French ses->Suid, info_class, (__u32)info_type); 367638c8a9a5SSteve French 367738c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 367838c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 367938c8a9a5SSteve French rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 368038c8a9a5SSteve French 368138c8a9a5SSteve French if (rc) { 368238c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); 368338c8a9a5SSteve French trace_smb3_query_info_err(xid, persistent_fid, tcon->tid, 368438c8a9a5SSteve French ses->Suid, info_class, (__u32)info_type, rc); 368538c8a9a5SSteve French goto qinf_exit; 368638c8a9a5SSteve French } 368738c8a9a5SSteve French 368838c8a9a5SSteve French trace_smb3_query_info_done(xid, persistent_fid, tcon->tid, 368938c8a9a5SSteve French ses->Suid, info_class, (__u32)info_type); 369038c8a9a5SSteve French 369138c8a9a5SSteve French if (dlen) { 369238c8a9a5SSteve French *dlen = le32_to_cpu(rsp->OutputBufferLength); 369338c8a9a5SSteve French if (!*data) { 369438c8a9a5SSteve French *data = kmalloc(*dlen, GFP_KERNEL); 369538c8a9a5SSteve French if (!*data) { 369638c8a9a5SSteve French cifs_tcon_dbg(VFS, 369738c8a9a5SSteve French "Error %d allocating memory for acl\n", 369838c8a9a5SSteve French rc); 369938c8a9a5SSteve French *dlen = 0; 370038c8a9a5SSteve French rc = -ENOMEM; 370138c8a9a5SSteve French goto qinf_exit; 370238c8a9a5SSteve French } 370338c8a9a5SSteve French allocated = true; 370438c8a9a5SSteve French } 370538c8a9a5SSteve French } 370638c8a9a5SSteve French 370738c8a9a5SSteve French rc = smb2_validate_and_copy_iov(le16_to_cpu(rsp->OutputBufferOffset), 370838c8a9a5SSteve French le32_to_cpu(rsp->OutputBufferLength), 370938c8a9a5SSteve French &rsp_iov, dlen ? *dlen : min_len, *data); 371038c8a9a5SSteve French if (rc && allocated) { 371138c8a9a5SSteve French kfree(*data); 371238c8a9a5SSteve French *data = NULL; 371338c8a9a5SSteve French *dlen = 0; 371438c8a9a5SSteve French } 371538c8a9a5SSteve French 371638c8a9a5SSteve French qinf_exit: 371738c8a9a5SSteve French SMB2_query_info_free(&rqst); 371838c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp); 371938c8a9a5SSteve French return rc; 372038c8a9a5SSteve French } 372138c8a9a5SSteve French 372238c8a9a5SSteve French int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon, 372338c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, struct smb2_file_all_info *data) 372438c8a9a5SSteve French { 372538c8a9a5SSteve French return query_info(xid, tcon, persistent_fid, volatile_fid, 372638c8a9a5SSteve French FILE_ALL_INFORMATION, SMB2_O_INFO_FILE, 0, 372738c8a9a5SSteve French sizeof(struct smb2_file_all_info) + PATH_MAX * 2, 372838c8a9a5SSteve French sizeof(struct smb2_file_all_info), (void **)&data, 372938c8a9a5SSteve French NULL); 373038c8a9a5SSteve French } 373138c8a9a5SSteve French 373238c8a9a5SSteve French #if 0 373338c8a9a5SSteve French /* currently unused, as now we are doing compounding instead (see smb311_posix_query_path_info) */ 373438c8a9a5SSteve French int 373538c8a9a5SSteve French SMB311_posix_query_info(const unsigned int xid, struct cifs_tcon *tcon, 373638c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, struct smb311_posix_qinfo *data, u32 *plen) 373738c8a9a5SSteve French { 373838c8a9a5SSteve French size_t output_len = sizeof(struct smb311_posix_qinfo *) + 373938c8a9a5SSteve French (sizeof(struct cifs_sid) * 2) + (PATH_MAX * 2); 374038c8a9a5SSteve French *plen = 0; 374138c8a9a5SSteve French 374238c8a9a5SSteve French return query_info(xid, tcon, persistent_fid, volatile_fid, 374338c8a9a5SSteve French SMB_FIND_FILE_POSIX_INFO, SMB2_O_INFO_FILE, 0, 374438c8a9a5SSteve French output_len, sizeof(struct smb311_posix_qinfo), (void **)&data, plen); 374538c8a9a5SSteve French /* Note caller must free "data" (passed in above). It may be allocated in query_info call */ 374638c8a9a5SSteve French } 374738c8a9a5SSteve French #endif 374838c8a9a5SSteve French 374938c8a9a5SSteve French int 375038c8a9a5SSteve French SMB2_query_acl(const unsigned int xid, struct cifs_tcon *tcon, 375138c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, 375238c8a9a5SSteve French void **data, u32 *plen, u32 extra_info) 375338c8a9a5SSteve French { 375438c8a9a5SSteve French __u32 additional_info = OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO | 375538c8a9a5SSteve French extra_info; 375638c8a9a5SSteve French *plen = 0; 375738c8a9a5SSteve French 375838c8a9a5SSteve French return query_info(xid, tcon, persistent_fid, volatile_fid, 375938c8a9a5SSteve French 0, SMB2_O_INFO_SECURITY, additional_info, 376038c8a9a5SSteve French SMB2_MAX_BUFFER_SIZE, MIN_SEC_DESC_LEN, data, plen); 376138c8a9a5SSteve French } 376238c8a9a5SSteve French 376338c8a9a5SSteve French int 376438c8a9a5SSteve French SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon, 376538c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid) 376638c8a9a5SSteve French { 376738c8a9a5SSteve French return query_info(xid, tcon, persistent_fid, volatile_fid, 376838c8a9a5SSteve French FILE_INTERNAL_INFORMATION, SMB2_O_INFO_FILE, 0, 376938c8a9a5SSteve French sizeof(struct smb2_file_internal_info), 377038c8a9a5SSteve French sizeof(struct smb2_file_internal_info), 377138c8a9a5SSteve French (void **)&uniqueid, NULL); 377238c8a9a5SSteve French } 377338c8a9a5SSteve French 377438c8a9a5SSteve French /* 377538c8a9a5SSteve French * CHANGE_NOTIFY Request is sent to get notifications on changes to a directory 377638c8a9a5SSteve French * See MS-SMB2 2.2.35 and 2.2.36 377738c8a9a5SSteve French */ 377838c8a9a5SSteve French 377938c8a9a5SSteve French static int 378038c8a9a5SSteve French SMB2_notify_init(const unsigned int xid, struct smb_rqst *rqst, 378138c8a9a5SSteve French struct cifs_tcon *tcon, struct TCP_Server_Info *server, 378238c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, 378338c8a9a5SSteve French u32 completion_filter, bool watch_tree) 378438c8a9a5SSteve French { 378538c8a9a5SSteve French struct smb2_change_notify_req *req; 378638c8a9a5SSteve French struct kvec *iov = rqst->rq_iov; 378738c8a9a5SSteve French unsigned int total_len; 378838c8a9a5SSteve French int rc; 378938c8a9a5SSteve French 379038c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_CHANGE_NOTIFY, tcon, server, 379138c8a9a5SSteve French (void **) &req, &total_len); 379238c8a9a5SSteve French if (rc) 379338c8a9a5SSteve French return rc; 379438c8a9a5SSteve French 379538c8a9a5SSteve French req->PersistentFileId = persistent_fid; 379638c8a9a5SSteve French req->VolatileFileId = volatile_fid; 379738c8a9a5SSteve French /* See note 354 of MS-SMB2, 64K max */ 379838c8a9a5SSteve French req->OutputBufferLength = 379938c8a9a5SSteve French cpu_to_le32(SMB2_MAX_BUFFER_SIZE - MAX_SMB2_HDR_SIZE); 380038c8a9a5SSteve French req->CompletionFilter = cpu_to_le32(completion_filter); 380138c8a9a5SSteve French if (watch_tree) 380238c8a9a5SSteve French req->Flags = cpu_to_le16(SMB2_WATCH_TREE); 380338c8a9a5SSteve French else 380438c8a9a5SSteve French req->Flags = 0; 380538c8a9a5SSteve French 380638c8a9a5SSteve French iov[0].iov_base = (char *)req; 380738c8a9a5SSteve French iov[0].iov_len = total_len; 380838c8a9a5SSteve French 380938c8a9a5SSteve French return 0; 381038c8a9a5SSteve French } 381138c8a9a5SSteve French 381238c8a9a5SSteve French int 381338c8a9a5SSteve French SMB2_change_notify(const unsigned int xid, struct cifs_tcon *tcon, 381438c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, bool watch_tree, 381538c8a9a5SSteve French u32 completion_filter, u32 max_out_data_len, char **out_data, 381638c8a9a5SSteve French u32 *plen /* returned data len */) 381738c8a9a5SSteve French { 381838c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 381938c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 382038c8a9a5SSteve French struct smb_rqst rqst; 382138c8a9a5SSteve French struct smb2_change_notify_rsp *smb_rsp; 382238c8a9a5SSteve French struct kvec iov[1]; 382338c8a9a5SSteve French struct kvec rsp_iov = {NULL, 0}; 382438c8a9a5SSteve French int resp_buftype = CIFS_NO_BUFFER; 382538c8a9a5SSteve French int flags = 0; 382638c8a9a5SSteve French int rc = 0; 382738c8a9a5SSteve French 382838c8a9a5SSteve French cifs_dbg(FYI, "change notify\n"); 382938c8a9a5SSteve French if (!ses || !server) 383038c8a9a5SSteve French return -EIO; 383138c8a9a5SSteve French 383238c8a9a5SSteve French if (smb3_encryption_required(tcon)) 383338c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 383438c8a9a5SSteve French 383538c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 383638c8a9a5SSteve French memset(&iov, 0, sizeof(iov)); 383738c8a9a5SSteve French if (plen) 383838c8a9a5SSteve French *plen = 0; 383938c8a9a5SSteve French 384038c8a9a5SSteve French rqst.rq_iov = iov; 384138c8a9a5SSteve French rqst.rq_nvec = 1; 384238c8a9a5SSteve French 384338c8a9a5SSteve French rc = SMB2_notify_init(xid, &rqst, tcon, server, 384438c8a9a5SSteve French persistent_fid, volatile_fid, 384538c8a9a5SSteve French completion_filter, watch_tree); 384638c8a9a5SSteve French if (rc) 384738c8a9a5SSteve French goto cnotify_exit; 384838c8a9a5SSteve French 384938c8a9a5SSteve French trace_smb3_notify_enter(xid, persistent_fid, tcon->tid, ses->Suid, 385038c8a9a5SSteve French (u8)watch_tree, completion_filter); 385138c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 385238c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 385338c8a9a5SSteve French 385438c8a9a5SSteve French if (rc != 0) { 385538c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_CHANGE_NOTIFY_HE); 385638c8a9a5SSteve French trace_smb3_notify_err(xid, persistent_fid, tcon->tid, ses->Suid, 385738c8a9a5SSteve French (u8)watch_tree, completion_filter, rc); 385838c8a9a5SSteve French } else { 385938c8a9a5SSteve French trace_smb3_notify_done(xid, persistent_fid, tcon->tid, 386038c8a9a5SSteve French ses->Suid, (u8)watch_tree, completion_filter); 386138c8a9a5SSteve French /* validate that notify information is plausible */ 386238c8a9a5SSteve French if ((rsp_iov.iov_base == NULL) || 386338c8a9a5SSteve French (rsp_iov.iov_len < sizeof(struct smb2_change_notify_rsp) + 1)) 386438c8a9a5SSteve French goto cnotify_exit; 386538c8a9a5SSteve French 386638c8a9a5SSteve French smb_rsp = (struct smb2_change_notify_rsp *)rsp_iov.iov_base; 386738c8a9a5SSteve French 386838c8a9a5SSteve French smb2_validate_iov(le16_to_cpu(smb_rsp->OutputBufferOffset), 386938c8a9a5SSteve French le32_to_cpu(smb_rsp->OutputBufferLength), &rsp_iov, 387038c8a9a5SSteve French sizeof(struct file_notify_information)); 387138c8a9a5SSteve French 387238c8a9a5SSteve French *out_data = kmemdup((char *)smb_rsp + le16_to_cpu(smb_rsp->OutputBufferOffset), 387338c8a9a5SSteve French le32_to_cpu(smb_rsp->OutputBufferLength), GFP_KERNEL); 387438c8a9a5SSteve French if (*out_data == NULL) { 387538c8a9a5SSteve French rc = -ENOMEM; 387638c8a9a5SSteve French goto cnotify_exit; 3877b535cc79SSteve French } else if (plen) 387838c8a9a5SSteve French *plen = le32_to_cpu(smb_rsp->OutputBufferLength); 387938c8a9a5SSteve French } 388038c8a9a5SSteve French 388138c8a9a5SSteve French cnotify_exit: 388238c8a9a5SSteve French if (rqst.rq_iov) 388338c8a9a5SSteve French cifs_small_buf_release(rqst.rq_iov[0].iov_base); /* request */ 388438c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp_iov.iov_base); 388538c8a9a5SSteve French return rc; 388638c8a9a5SSteve French } 388738c8a9a5SSteve French 388838c8a9a5SSteve French 388938c8a9a5SSteve French 389038c8a9a5SSteve French /* 389138c8a9a5SSteve French * This is a no-op for now. We're not really interested in the reply, but 389238c8a9a5SSteve French * rather in the fact that the server sent one and that server->lstrp 389338c8a9a5SSteve French * gets updated. 389438c8a9a5SSteve French * 389538c8a9a5SSteve French * FIXME: maybe we should consider checking that the reply matches request? 389638c8a9a5SSteve French */ 389738c8a9a5SSteve French static void 389838c8a9a5SSteve French smb2_echo_callback(struct mid_q_entry *mid) 389938c8a9a5SSteve French { 390038c8a9a5SSteve French struct TCP_Server_Info *server = mid->callback_data; 390138c8a9a5SSteve French struct smb2_echo_rsp *rsp = (struct smb2_echo_rsp *)mid->resp_buf; 390238c8a9a5SSteve French struct cifs_credits credits = { .value = 0, .instance = 0 }; 390338c8a9a5SSteve French 390438c8a9a5SSteve French if (mid->mid_state == MID_RESPONSE_RECEIVED 390538c8a9a5SSteve French || mid->mid_state == MID_RESPONSE_MALFORMED) { 390638c8a9a5SSteve French credits.value = le16_to_cpu(rsp->hdr.CreditRequest); 390738c8a9a5SSteve French credits.instance = server->reconnect_instance; 390838c8a9a5SSteve French } 390938c8a9a5SSteve French 391038c8a9a5SSteve French release_mid(mid); 391138c8a9a5SSteve French add_credits(server, &credits, CIFS_ECHO_OP); 391238c8a9a5SSteve French } 391338c8a9a5SSteve French 391438c8a9a5SSteve French void smb2_reconnect_server(struct work_struct *work) 391538c8a9a5SSteve French { 391638c8a9a5SSteve French struct TCP_Server_Info *server = container_of(work, 391738c8a9a5SSteve French struct TCP_Server_Info, reconnect.work); 391838c8a9a5SSteve French struct TCP_Server_Info *pserver; 391938c8a9a5SSteve French struct cifs_ses *ses, *ses2; 392038c8a9a5SSteve French struct cifs_tcon *tcon, *tcon2; 392138c8a9a5SSteve French struct list_head tmp_list, tmp_ses_list; 392238c8a9a5SSteve French bool tcon_exist = false, ses_exist = false; 392338c8a9a5SSteve French bool tcon_selected = false; 392438c8a9a5SSteve French int rc; 392538c8a9a5SSteve French bool resched = false; 392638c8a9a5SSteve French 3927*07e86408SShyam Prasad N /* first check if ref count has reached 0, if not inc ref count */ 3928*07e86408SShyam Prasad N spin_lock(&cifs_tcp_ses_lock); 3929*07e86408SShyam Prasad N if (!server->srv_count) { 3930*07e86408SShyam Prasad N spin_unlock(&cifs_tcp_ses_lock); 3931*07e86408SShyam Prasad N return; 3932*07e86408SShyam Prasad N } 3933*07e86408SShyam Prasad N server->srv_count++; 3934*07e86408SShyam Prasad N spin_unlock(&cifs_tcp_ses_lock); 3935*07e86408SShyam Prasad N 393638c8a9a5SSteve French /* If server is a channel, select the primary channel */ 3937b3773b19SSteve French pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 393838c8a9a5SSteve French 393938c8a9a5SSteve French /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */ 394038c8a9a5SSteve French mutex_lock(&pserver->reconnect_mutex); 394138c8a9a5SSteve French 39423e161536SShyam Prasad N /* if the server is marked for termination, drop the ref count here */ 39433e161536SShyam Prasad N if (server->terminate) { 39443e161536SShyam Prasad N cifs_put_tcp_session(server, true); 39453e161536SShyam Prasad N mutex_unlock(&pserver->reconnect_mutex); 39463e161536SShyam Prasad N return; 39473e161536SShyam Prasad N } 39483e161536SShyam Prasad N 394938c8a9a5SSteve French INIT_LIST_HEAD(&tmp_list); 395038c8a9a5SSteve French INIT_LIST_HEAD(&tmp_ses_list); 395138c8a9a5SSteve French cifs_dbg(FYI, "Reconnecting tcons and channels\n"); 395238c8a9a5SSteve French 395338c8a9a5SSteve French spin_lock(&cifs_tcp_ses_lock); 395438c8a9a5SSteve French list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 395599f28070SWinston Wen spin_lock(&ses->ses_lock); 395699f28070SWinston Wen if (ses->ses_status == SES_EXITING) { 395799f28070SWinston Wen spin_unlock(&ses->ses_lock); 395899f28070SWinston Wen continue; 395999f28070SWinston Wen } 396099f28070SWinston Wen spin_unlock(&ses->ses_lock); 396138c8a9a5SSteve French 396238c8a9a5SSteve French tcon_selected = false; 396338c8a9a5SSteve French 396438c8a9a5SSteve French list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 396538c8a9a5SSteve French if (tcon->need_reconnect || tcon->need_reopen_files) { 396638c8a9a5SSteve French tcon->tc_count++; 396738c8a9a5SSteve French list_add_tail(&tcon->rlist, &tmp_list); 396838c8a9a5SSteve French tcon_selected = tcon_exist = true; 396938c8a9a5SSteve French } 397038c8a9a5SSteve French } 397138c8a9a5SSteve French /* 397238c8a9a5SSteve French * IPC has the same lifetime as its session and uses its 397338c8a9a5SSteve French * refcount. 397438c8a9a5SSteve French */ 397538c8a9a5SSteve French if (ses->tcon_ipc && ses->tcon_ipc->need_reconnect) { 397638c8a9a5SSteve French list_add_tail(&ses->tcon_ipc->rlist, &tmp_list); 397738c8a9a5SSteve French tcon_selected = tcon_exist = true; 397838c8a9a5SSteve French cifs_smb_ses_inc_refcount(ses); 397938c8a9a5SSteve French } 398038c8a9a5SSteve French /* 398138c8a9a5SSteve French * handle the case where channel needs to reconnect 398238c8a9a5SSteve French * binding session, but tcon is healthy (some other channel 398338c8a9a5SSteve French * is active) 398438c8a9a5SSteve French */ 398538c8a9a5SSteve French spin_lock(&ses->chan_lock); 398638c8a9a5SSteve French if (!tcon_selected && cifs_chan_needs_reconnect(ses, server)) { 398738c8a9a5SSteve French list_add_tail(&ses->rlist, &tmp_ses_list); 398838c8a9a5SSteve French ses_exist = true; 398938c8a9a5SSteve French cifs_smb_ses_inc_refcount(ses); 399038c8a9a5SSteve French } 399138c8a9a5SSteve French spin_unlock(&ses->chan_lock); 399238c8a9a5SSteve French } 399338c8a9a5SSteve French spin_unlock(&cifs_tcp_ses_lock); 399438c8a9a5SSteve French 399538c8a9a5SSteve French list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) { 3996*07e86408SShyam Prasad N rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon, server, true); 399738c8a9a5SSteve French if (!rc) 399838c8a9a5SSteve French cifs_reopen_persistent_handles(tcon); 399938c8a9a5SSteve French else 400038c8a9a5SSteve French resched = true; 400138c8a9a5SSteve French list_del_init(&tcon->rlist); 400238c8a9a5SSteve French if (tcon->ipc) 400338c8a9a5SSteve French cifs_put_smb_ses(tcon->ses); 400438c8a9a5SSteve French else 400538c8a9a5SSteve French cifs_put_tcon(tcon); 400638c8a9a5SSteve French } 400738c8a9a5SSteve French 400838c8a9a5SSteve French if (!ses_exist) 400938c8a9a5SSteve French goto done; 401038c8a9a5SSteve French 401138c8a9a5SSteve French /* allocate a dummy tcon struct used for reconnect */ 40122da338ffSSteve French tcon = tcon_info_alloc(false); 401338c8a9a5SSteve French if (!tcon) { 401438c8a9a5SSteve French resched = true; 401538c8a9a5SSteve French list_for_each_entry_safe(ses, ses2, &tmp_ses_list, rlist) { 401638c8a9a5SSteve French list_del_init(&ses->rlist); 401738c8a9a5SSteve French cifs_put_smb_ses(ses); 401838c8a9a5SSteve French } 401938c8a9a5SSteve French goto done; 402038c8a9a5SSteve French } 402138c8a9a5SSteve French 402238c8a9a5SSteve French tcon->status = TID_GOOD; 402338c8a9a5SSteve French tcon->retry = false; 402438c8a9a5SSteve French tcon->need_reconnect = false; 402538c8a9a5SSteve French 402638c8a9a5SSteve French /* now reconnect sessions for necessary channels */ 402738c8a9a5SSteve French list_for_each_entry_safe(ses, ses2, &tmp_ses_list, rlist) { 402838c8a9a5SSteve French tcon->ses = ses; 4029*07e86408SShyam Prasad N rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon, server, true); 403038c8a9a5SSteve French if (rc) 403138c8a9a5SSteve French resched = true; 403238c8a9a5SSteve French list_del_init(&ses->rlist); 403338c8a9a5SSteve French cifs_put_smb_ses(ses); 403438c8a9a5SSteve French } 403538c8a9a5SSteve French tconInfoFree(tcon); 403638c8a9a5SSteve French 403738c8a9a5SSteve French done: 403838c8a9a5SSteve French cifs_dbg(FYI, "Reconnecting tcons and channels finished\n"); 40393a0ef868SShyam Prasad N if (resched) 404038c8a9a5SSteve French queue_delayed_work(cifsiod_wq, &server->reconnect, 2 * HZ); 404138c8a9a5SSteve French mutex_unlock(&pserver->reconnect_mutex); 404238c8a9a5SSteve French 404338c8a9a5SSteve French /* now we can safely release srv struct */ 4044*07e86408SShyam Prasad N cifs_put_tcp_session(server, true); 404538c8a9a5SSteve French } 404638c8a9a5SSteve French 404738c8a9a5SSteve French int 404838c8a9a5SSteve French SMB2_echo(struct TCP_Server_Info *server) 404938c8a9a5SSteve French { 405038c8a9a5SSteve French struct smb2_echo_req *req; 405138c8a9a5SSteve French int rc = 0; 405238c8a9a5SSteve French struct kvec iov[1]; 405338c8a9a5SSteve French struct smb_rqst rqst = { .rq_iov = iov, 405438c8a9a5SSteve French .rq_nvec = 1 }; 405538c8a9a5SSteve French unsigned int total_len; 405638c8a9a5SSteve French 405738c8a9a5SSteve French cifs_dbg(FYI, "In echo request for conn_id %lld\n", server->conn_id); 405838c8a9a5SSteve French 405938c8a9a5SSteve French spin_lock(&server->srv_lock); 406038c8a9a5SSteve French if (server->ops->need_neg && 406138c8a9a5SSteve French server->ops->need_neg(server)) { 406238c8a9a5SSteve French spin_unlock(&server->srv_lock); 406338c8a9a5SSteve French /* No need to send echo on newly established connections */ 40643a0ef868SShyam Prasad N mod_delayed_work(cifsiod_wq, &server->reconnect, 0); 406538c8a9a5SSteve French return rc; 406638c8a9a5SSteve French } 406738c8a9a5SSteve French spin_unlock(&server->srv_lock); 406838c8a9a5SSteve French 406938c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_ECHO, NULL, server, 407038c8a9a5SSteve French (void **)&req, &total_len); 407138c8a9a5SSteve French if (rc) 407238c8a9a5SSteve French return rc; 407338c8a9a5SSteve French 407438c8a9a5SSteve French req->hdr.CreditRequest = cpu_to_le16(1); 407538c8a9a5SSteve French 407638c8a9a5SSteve French iov[0].iov_len = total_len; 407738c8a9a5SSteve French iov[0].iov_base = (char *)req; 407838c8a9a5SSteve French 407938c8a9a5SSteve French rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL, 408038c8a9a5SSteve French server, CIFS_ECHO_OP, NULL); 408138c8a9a5SSteve French if (rc) 408238c8a9a5SSteve French cifs_dbg(FYI, "Echo request failed: %d\n", rc); 408338c8a9a5SSteve French 408438c8a9a5SSteve French cifs_small_buf_release(req); 408538c8a9a5SSteve French return rc; 408638c8a9a5SSteve French } 408738c8a9a5SSteve French 408838c8a9a5SSteve French void 408938c8a9a5SSteve French SMB2_flush_free(struct smb_rqst *rqst) 409038c8a9a5SSteve French { 409138c8a9a5SSteve French if (rqst && rqst->rq_iov) 409238c8a9a5SSteve French cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */ 409338c8a9a5SSteve French } 409438c8a9a5SSteve French 409538c8a9a5SSteve French int 409638c8a9a5SSteve French SMB2_flush_init(const unsigned int xid, struct smb_rqst *rqst, 409738c8a9a5SSteve French struct cifs_tcon *tcon, struct TCP_Server_Info *server, 409838c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid) 409938c8a9a5SSteve French { 410038c8a9a5SSteve French struct smb2_flush_req *req; 410138c8a9a5SSteve French struct kvec *iov = rqst->rq_iov; 410238c8a9a5SSteve French unsigned int total_len; 410338c8a9a5SSteve French int rc; 410438c8a9a5SSteve French 410538c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_FLUSH, tcon, server, 410638c8a9a5SSteve French (void **) &req, &total_len); 410738c8a9a5SSteve French if (rc) 410838c8a9a5SSteve French return rc; 410938c8a9a5SSteve French 411038c8a9a5SSteve French req->PersistentFileId = persistent_fid; 411138c8a9a5SSteve French req->VolatileFileId = volatile_fid; 411238c8a9a5SSteve French 411338c8a9a5SSteve French iov[0].iov_base = (char *)req; 411438c8a9a5SSteve French iov[0].iov_len = total_len; 411538c8a9a5SSteve French 411638c8a9a5SSteve French return 0; 411738c8a9a5SSteve French } 411838c8a9a5SSteve French 411938c8a9a5SSteve French int 412038c8a9a5SSteve French SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, 412138c8a9a5SSteve French u64 volatile_fid) 412238c8a9a5SSteve French { 412338c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 412438c8a9a5SSteve French struct smb_rqst rqst; 412538c8a9a5SSteve French struct kvec iov[1]; 412638c8a9a5SSteve French struct kvec rsp_iov = {NULL, 0}; 412738c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 412838c8a9a5SSteve French int resp_buftype = CIFS_NO_BUFFER; 412938c8a9a5SSteve French int flags = 0; 413038c8a9a5SSteve French int rc = 0; 413138c8a9a5SSteve French 413238c8a9a5SSteve French cifs_dbg(FYI, "flush\n"); 413338c8a9a5SSteve French if (!ses || !(ses->server)) 413438c8a9a5SSteve French return -EIO; 413538c8a9a5SSteve French 413638c8a9a5SSteve French if (smb3_encryption_required(tcon)) 413738c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 413838c8a9a5SSteve French 413938c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 414038c8a9a5SSteve French memset(&iov, 0, sizeof(iov)); 414138c8a9a5SSteve French rqst.rq_iov = iov; 414238c8a9a5SSteve French rqst.rq_nvec = 1; 414338c8a9a5SSteve French 414438c8a9a5SSteve French rc = SMB2_flush_init(xid, &rqst, tcon, server, 414538c8a9a5SSteve French persistent_fid, volatile_fid); 414638c8a9a5SSteve French if (rc) 414738c8a9a5SSteve French goto flush_exit; 414838c8a9a5SSteve French 414938c8a9a5SSteve French trace_smb3_flush_enter(xid, persistent_fid, tcon->tid, ses->Suid); 415038c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 415138c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 415238c8a9a5SSteve French 415338c8a9a5SSteve French if (rc != 0) { 415438c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE); 415538c8a9a5SSteve French trace_smb3_flush_err(xid, persistent_fid, tcon->tid, ses->Suid, 415638c8a9a5SSteve French rc); 415738c8a9a5SSteve French } else 415838c8a9a5SSteve French trace_smb3_flush_done(xid, persistent_fid, tcon->tid, 415938c8a9a5SSteve French ses->Suid); 416038c8a9a5SSteve French 416138c8a9a5SSteve French flush_exit: 416238c8a9a5SSteve French SMB2_flush_free(&rqst); 416338c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp_iov.iov_base); 416438c8a9a5SSteve French return rc; 416538c8a9a5SSteve French } 416638c8a9a5SSteve French 416738c8a9a5SSteve French #ifdef CONFIG_CIFS_SMB_DIRECT 416838c8a9a5SSteve French static inline bool smb3_use_rdma_offload(struct cifs_io_parms *io_parms) 416938c8a9a5SSteve French { 417038c8a9a5SSteve French struct TCP_Server_Info *server = io_parms->server; 417138c8a9a5SSteve French struct cifs_tcon *tcon = io_parms->tcon; 417238c8a9a5SSteve French 417338c8a9a5SSteve French /* we can only offload if we're connected */ 417438c8a9a5SSteve French if (!server || !tcon) 417538c8a9a5SSteve French return false; 417638c8a9a5SSteve French 417738c8a9a5SSteve French /* we can only offload on an rdma connection */ 417838c8a9a5SSteve French if (!server->rdma || !server->smbd_conn) 417938c8a9a5SSteve French return false; 418038c8a9a5SSteve French 418138c8a9a5SSteve French /* we don't support signed offload yet */ 418238c8a9a5SSteve French if (server->sign) 418338c8a9a5SSteve French return false; 418438c8a9a5SSteve French 418538c8a9a5SSteve French /* we don't support encrypted offload yet */ 418638c8a9a5SSteve French if (smb3_encryption_required(tcon)) 418738c8a9a5SSteve French return false; 418838c8a9a5SSteve French 418938c8a9a5SSteve French /* offload also has its overhead, so only do it if desired */ 419038c8a9a5SSteve French if (io_parms->length < server->smbd_conn->rdma_readwrite_threshold) 419138c8a9a5SSteve French return false; 419238c8a9a5SSteve French 419338c8a9a5SSteve French return true; 419438c8a9a5SSteve French } 419538c8a9a5SSteve French #endif /* CONFIG_CIFS_SMB_DIRECT */ 419638c8a9a5SSteve French 419738c8a9a5SSteve French /* 419838c8a9a5SSteve French * To form a chain of read requests, any read requests after the first should 419938c8a9a5SSteve French * have the end_of_chain boolean set to true. 420038c8a9a5SSteve French */ 420138c8a9a5SSteve French static int 420238c8a9a5SSteve French smb2_new_read_req(void **buf, unsigned int *total_len, 420338c8a9a5SSteve French struct cifs_io_parms *io_parms, struct cifs_readdata *rdata, 420438c8a9a5SSteve French unsigned int remaining_bytes, int request_type) 420538c8a9a5SSteve French { 420638c8a9a5SSteve French int rc = -EACCES; 420738c8a9a5SSteve French struct smb2_read_req *req = NULL; 420838c8a9a5SSteve French struct smb2_hdr *shdr; 420938c8a9a5SSteve French struct TCP_Server_Info *server = io_parms->server; 421038c8a9a5SSteve French 421138c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, server, 421238c8a9a5SSteve French (void **) &req, total_len); 421338c8a9a5SSteve French if (rc) 421438c8a9a5SSteve French return rc; 421538c8a9a5SSteve French 421638c8a9a5SSteve French if (server == NULL) 421738c8a9a5SSteve French return -ECONNABORTED; 421838c8a9a5SSteve French 421938c8a9a5SSteve French shdr = &req->hdr; 422038c8a9a5SSteve French shdr->Id.SyncId.ProcessId = cpu_to_le32(io_parms->pid); 422138c8a9a5SSteve French 422238c8a9a5SSteve French req->PersistentFileId = io_parms->persistent_fid; 422338c8a9a5SSteve French req->VolatileFileId = io_parms->volatile_fid; 422438c8a9a5SSteve French req->ReadChannelInfoOffset = 0; /* reserved */ 422538c8a9a5SSteve French req->ReadChannelInfoLength = 0; /* reserved */ 422638c8a9a5SSteve French req->Channel = 0; /* reserved */ 422738c8a9a5SSteve French req->MinimumCount = 0; 422838c8a9a5SSteve French req->Length = cpu_to_le32(io_parms->length); 422938c8a9a5SSteve French req->Offset = cpu_to_le64(io_parms->offset); 423038c8a9a5SSteve French 423138c8a9a5SSteve French trace_smb3_read_enter(0 /* xid */, 423238c8a9a5SSteve French io_parms->persistent_fid, 423338c8a9a5SSteve French io_parms->tcon->tid, io_parms->tcon->ses->Suid, 423438c8a9a5SSteve French io_parms->offset, io_parms->length); 423538c8a9a5SSteve French #ifdef CONFIG_CIFS_SMB_DIRECT 423638c8a9a5SSteve French /* 423738c8a9a5SSteve French * If we want to do a RDMA write, fill in and append 423838c8a9a5SSteve French * smbd_buffer_descriptor_v1 to the end of read request 423938c8a9a5SSteve French */ 424038c8a9a5SSteve French if (smb3_use_rdma_offload(io_parms)) { 424138c8a9a5SSteve French struct smbd_buffer_descriptor_v1 *v1; 424238c8a9a5SSteve French bool need_invalidate = server->dialect == SMB30_PROT_ID; 424338c8a9a5SSteve French 424438c8a9a5SSteve French rdata->mr = smbd_register_mr(server->smbd_conn, &rdata->iter, 424538c8a9a5SSteve French true, need_invalidate); 424638c8a9a5SSteve French if (!rdata->mr) 424738c8a9a5SSteve French return -EAGAIN; 424838c8a9a5SSteve French 424938c8a9a5SSteve French req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE; 425038c8a9a5SSteve French if (need_invalidate) 425138c8a9a5SSteve French req->Channel = SMB2_CHANNEL_RDMA_V1; 425238c8a9a5SSteve French req->ReadChannelInfoOffset = 425338c8a9a5SSteve French cpu_to_le16(offsetof(struct smb2_read_req, Buffer)); 425438c8a9a5SSteve French req->ReadChannelInfoLength = 425538c8a9a5SSteve French cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1)); 425638c8a9a5SSteve French v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0]; 425738c8a9a5SSteve French v1->offset = cpu_to_le64(rdata->mr->mr->iova); 425838c8a9a5SSteve French v1->token = cpu_to_le32(rdata->mr->mr->rkey); 425938c8a9a5SSteve French v1->length = cpu_to_le32(rdata->mr->mr->length); 426038c8a9a5SSteve French 426138c8a9a5SSteve French *total_len += sizeof(*v1) - 1; 426238c8a9a5SSteve French } 426338c8a9a5SSteve French #endif 426438c8a9a5SSteve French if (request_type & CHAINED_REQUEST) { 426538c8a9a5SSteve French if (!(request_type & END_OF_CHAIN)) { 426638c8a9a5SSteve French /* next 8-byte aligned request */ 426738c8a9a5SSteve French *total_len = ALIGN(*total_len, 8); 426838c8a9a5SSteve French shdr->NextCommand = cpu_to_le32(*total_len); 426938c8a9a5SSteve French } else /* END_OF_CHAIN */ 427038c8a9a5SSteve French shdr->NextCommand = 0; 427138c8a9a5SSteve French if (request_type & RELATED_REQUEST) { 427238c8a9a5SSteve French shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS; 427338c8a9a5SSteve French /* 427438c8a9a5SSteve French * Related requests use info from previous read request 427538c8a9a5SSteve French * in chain. 427638c8a9a5SSteve French */ 427738c8a9a5SSteve French shdr->SessionId = cpu_to_le64(0xFFFFFFFFFFFFFFFF); 427838c8a9a5SSteve French shdr->Id.SyncId.TreeId = cpu_to_le32(0xFFFFFFFF); 427938c8a9a5SSteve French req->PersistentFileId = (u64)-1; 428038c8a9a5SSteve French req->VolatileFileId = (u64)-1; 428138c8a9a5SSteve French } 428238c8a9a5SSteve French } 428338c8a9a5SSteve French if (remaining_bytes > io_parms->length) 428438c8a9a5SSteve French req->RemainingBytes = cpu_to_le32(remaining_bytes); 428538c8a9a5SSteve French else 428638c8a9a5SSteve French req->RemainingBytes = 0; 428738c8a9a5SSteve French 428838c8a9a5SSteve French *buf = req; 428938c8a9a5SSteve French return rc; 429038c8a9a5SSteve French } 429138c8a9a5SSteve French 429238c8a9a5SSteve French static void 429338c8a9a5SSteve French smb2_readv_callback(struct mid_q_entry *mid) 429438c8a9a5SSteve French { 429538c8a9a5SSteve French struct cifs_readdata *rdata = mid->callback_data; 429638c8a9a5SSteve French struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); 429738c8a9a5SSteve French struct TCP_Server_Info *server = rdata->server; 429838c8a9a5SSteve French struct smb2_hdr *shdr = 429938c8a9a5SSteve French (struct smb2_hdr *)rdata->iov[0].iov_base; 430038c8a9a5SSteve French struct cifs_credits credits = { .value = 0, .instance = 0 }; 430138c8a9a5SSteve French struct smb_rqst rqst = { .rq_iov = &rdata->iov[1], .rq_nvec = 1 }; 430238c8a9a5SSteve French 430338c8a9a5SSteve French if (rdata->got_bytes) { 430438c8a9a5SSteve French rqst.rq_iter = rdata->iter; 430538c8a9a5SSteve French rqst.rq_iter_size = iov_iter_count(&rdata->iter); 430638c8a9a5SSteve French } 430738c8a9a5SSteve French 430838c8a9a5SSteve French WARN_ONCE(rdata->server != mid->server, 430938c8a9a5SSteve French "rdata server %p != mid server %p", 431038c8a9a5SSteve French rdata->server, mid->server); 431138c8a9a5SSteve French 431238c8a9a5SSteve French cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n", 431338c8a9a5SSteve French __func__, mid->mid, mid->mid_state, rdata->result, 431438c8a9a5SSteve French rdata->bytes); 431538c8a9a5SSteve French 431638c8a9a5SSteve French switch (mid->mid_state) { 431738c8a9a5SSteve French case MID_RESPONSE_RECEIVED: 431838c8a9a5SSteve French credits.value = le16_to_cpu(shdr->CreditRequest); 431938c8a9a5SSteve French credits.instance = server->reconnect_instance; 432038c8a9a5SSteve French /* result already set, check signature */ 432138c8a9a5SSteve French if (server->sign && !mid->decrypted) { 432238c8a9a5SSteve French int rc; 432338c8a9a5SSteve French 432438c8a9a5SSteve French iov_iter_revert(&rqst.rq_iter, rdata->got_bytes); 432538c8a9a5SSteve French iov_iter_truncate(&rqst.rq_iter, rdata->got_bytes); 432638c8a9a5SSteve French rc = smb2_verify_signature(&rqst, server); 432738c8a9a5SSteve French if (rc) 432838c8a9a5SSteve French cifs_tcon_dbg(VFS, "SMB signature verification returned error = %d\n", 432938c8a9a5SSteve French rc); 433038c8a9a5SSteve French } 433138c8a9a5SSteve French /* FIXME: should this be counted toward the initiating task? */ 433238c8a9a5SSteve French task_io_account_read(rdata->got_bytes); 433338c8a9a5SSteve French cifs_stats_bytes_read(tcon, rdata->got_bytes); 433438c8a9a5SSteve French break; 433538c8a9a5SSteve French case MID_REQUEST_SUBMITTED: 433638c8a9a5SSteve French case MID_RETRY_NEEDED: 433738c8a9a5SSteve French rdata->result = -EAGAIN; 433838c8a9a5SSteve French if (server->sign && rdata->got_bytes) 433938c8a9a5SSteve French /* reset bytes number since we can not check a sign */ 434038c8a9a5SSteve French rdata->got_bytes = 0; 434138c8a9a5SSteve French /* FIXME: should this be counted toward the initiating task? */ 434238c8a9a5SSteve French task_io_account_read(rdata->got_bytes); 434338c8a9a5SSteve French cifs_stats_bytes_read(tcon, rdata->got_bytes); 434438c8a9a5SSteve French break; 434538c8a9a5SSteve French case MID_RESPONSE_MALFORMED: 434638c8a9a5SSteve French credits.value = le16_to_cpu(shdr->CreditRequest); 434738c8a9a5SSteve French credits.instance = server->reconnect_instance; 434838c8a9a5SSteve French fallthrough; 434938c8a9a5SSteve French default: 435038c8a9a5SSteve French rdata->result = -EIO; 435138c8a9a5SSteve French } 435238c8a9a5SSteve French #ifdef CONFIG_CIFS_SMB_DIRECT 435338c8a9a5SSteve French /* 435438c8a9a5SSteve French * If this rdata has a memmory registered, the MR can be freed 435538c8a9a5SSteve French * MR needs to be freed as soon as I/O finishes to prevent deadlock 435638c8a9a5SSteve French * because they have limited number and are used for future I/Os 435738c8a9a5SSteve French */ 435838c8a9a5SSteve French if (rdata->mr) { 435938c8a9a5SSteve French smbd_deregister_mr(rdata->mr); 436038c8a9a5SSteve French rdata->mr = NULL; 436138c8a9a5SSteve French } 436238c8a9a5SSteve French #endif 436338c8a9a5SSteve French if (rdata->result && rdata->result != -ENODATA) { 436438c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_READ_HE); 436538c8a9a5SSteve French trace_smb3_read_err(0 /* xid */, 436638c8a9a5SSteve French rdata->cfile->fid.persistent_fid, 436738c8a9a5SSteve French tcon->tid, tcon->ses->Suid, rdata->offset, 436838c8a9a5SSteve French rdata->bytes, rdata->result); 436938c8a9a5SSteve French } else 437038c8a9a5SSteve French trace_smb3_read_done(0 /* xid */, 437138c8a9a5SSteve French rdata->cfile->fid.persistent_fid, 437238c8a9a5SSteve French tcon->tid, tcon->ses->Suid, 437338c8a9a5SSteve French rdata->offset, rdata->got_bytes); 437438c8a9a5SSteve French 437538c8a9a5SSteve French queue_work(cifsiod_wq, &rdata->work); 437638c8a9a5SSteve French release_mid(mid); 437738c8a9a5SSteve French add_credits(server, &credits, 0); 437838c8a9a5SSteve French } 437938c8a9a5SSteve French 438038c8a9a5SSteve French /* smb2_async_readv - send an async read, and set up mid to handle result */ 438138c8a9a5SSteve French int 438238c8a9a5SSteve French smb2_async_readv(struct cifs_readdata *rdata) 438338c8a9a5SSteve French { 438438c8a9a5SSteve French int rc, flags = 0; 438538c8a9a5SSteve French char *buf; 438638c8a9a5SSteve French struct smb2_hdr *shdr; 438738c8a9a5SSteve French struct cifs_io_parms io_parms; 438838c8a9a5SSteve French struct smb_rqst rqst = { .rq_iov = rdata->iov, 438938c8a9a5SSteve French .rq_nvec = 1 }; 439038c8a9a5SSteve French struct TCP_Server_Info *server; 439138c8a9a5SSteve French struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); 439238c8a9a5SSteve French unsigned int total_len; 43935e90aa21SShyam Prasad N int credit_request; 439438c8a9a5SSteve French 439538c8a9a5SSteve French cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n", 439638c8a9a5SSteve French __func__, rdata->offset, rdata->bytes); 439738c8a9a5SSteve French 439838c8a9a5SSteve French if (!rdata->server) 439938c8a9a5SSteve French rdata->server = cifs_pick_channel(tcon->ses); 440038c8a9a5SSteve French 440138c8a9a5SSteve French io_parms.tcon = tlink_tcon(rdata->cfile->tlink); 440238c8a9a5SSteve French io_parms.server = server = rdata->server; 440338c8a9a5SSteve French io_parms.offset = rdata->offset; 440438c8a9a5SSteve French io_parms.length = rdata->bytes; 440538c8a9a5SSteve French io_parms.persistent_fid = rdata->cfile->fid.persistent_fid; 440638c8a9a5SSteve French io_parms.volatile_fid = rdata->cfile->fid.volatile_fid; 440738c8a9a5SSteve French io_parms.pid = rdata->pid; 440838c8a9a5SSteve French 440938c8a9a5SSteve French rc = smb2_new_read_req( 441038c8a9a5SSteve French (void **) &buf, &total_len, &io_parms, rdata, 0, 0); 441138c8a9a5SSteve French if (rc) 441238c8a9a5SSteve French return rc; 441338c8a9a5SSteve French 441438c8a9a5SSteve French if (smb3_encryption_required(io_parms.tcon)) 441538c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 441638c8a9a5SSteve French 441738c8a9a5SSteve French rdata->iov[0].iov_base = buf; 441838c8a9a5SSteve French rdata->iov[0].iov_len = total_len; 441938c8a9a5SSteve French 442038c8a9a5SSteve French shdr = (struct smb2_hdr *)buf; 442138c8a9a5SSteve French 442238c8a9a5SSteve French if (rdata->credits.value > 0) { 442338c8a9a5SSteve French shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes, 442438c8a9a5SSteve French SMB2_MAX_BUFFER_SIZE)); 44255e90aa21SShyam Prasad N credit_request = le16_to_cpu(shdr->CreditCharge) + 8; 44265e90aa21SShyam Prasad N if (server->credits >= server->max_credits) 44275e90aa21SShyam Prasad N shdr->CreditRequest = cpu_to_le16(0); 44285e90aa21SShyam Prasad N else 44295e90aa21SShyam Prasad N shdr->CreditRequest = cpu_to_le16( 44305e90aa21SShyam Prasad N min_t(int, server->max_credits - 44315e90aa21SShyam Prasad N server->credits, credit_request)); 443238c8a9a5SSteve French 443338c8a9a5SSteve French rc = adjust_credits(server, &rdata->credits, rdata->bytes); 443438c8a9a5SSteve French if (rc) 443538c8a9a5SSteve French goto async_readv_out; 443638c8a9a5SSteve French 443738c8a9a5SSteve French flags |= CIFS_HAS_CREDITS; 443838c8a9a5SSteve French } 443938c8a9a5SSteve French 444038c8a9a5SSteve French kref_get(&rdata->refcount); 444138c8a9a5SSteve French rc = cifs_call_async(server, &rqst, 444238c8a9a5SSteve French cifs_readv_receive, smb2_readv_callback, 444338c8a9a5SSteve French smb3_handle_read_data, rdata, flags, 444438c8a9a5SSteve French &rdata->credits); 444538c8a9a5SSteve French if (rc) { 444638c8a9a5SSteve French kref_put(&rdata->refcount, cifs_readdata_release); 444738c8a9a5SSteve French cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE); 444838c8a9a5SSteve French trace_smb3_read_err(0 /* xid */, io_parms.persistent_fid, 444938c8a9a5SSteve French io_parms.tcon->tid, 445038c8a9a5SSteve French io_parms.tcon->ses->Suid, 445138c8a9a5SSteve French io_parms.offset, io_parms.length, rc); 445238c8a9a5SSteve French } 445338c8a9a5SSteve French 445438c8a9a5SSteve French async_readv_out: 445538c8a9a5SSteve French cifs_small_buf_release(buf); 445638c8a9a5SSteve French return rc; 445738c8a9a5SSteve French } 445838c8a9a5SSteve French 445938c8a9a5SSteve French int 446038c8a9a5SSteve French SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms, 446138c8a9a5SSteve French unsigned int *nbytes, char **buf, int *buf_type) 446238c8a9a5SSteve French { 446338c8a9a5SSteve French struct smb_rqst rqst; 446438c8a9a5SSteve French int resp_buftype, rc; 446538c8a9a5SSteve French struct smb2_read_req *req = NULL; 446638c8a9a5SSteve French struct smb2_read_rsp *rsp = NULL; 446738c8a9a5SSteve French struct kvec iov[1]; 446838c8a9a5SSteve French struct kvec rsp_iov; 446938c8a9a5SSteve French unsigned int total_len; 447038c8a9a5SSteve French int flags = CIFS_LOG_ERROR; 447138c8a9a5SSteve French struct cifs_ses *ses = io_parms->tcon->ses; 447238c8a9a5SSteve French 447338c8a9a5SSteve French if (!io_parms->server) 447438c8a9a5SSteve French io_parms->server = cifs_pick_channel(io_parms->tcon->ses); 447538c8a9a5SSteve French 447638c8a9a5SSteve French *nbytes = 0; 447738c8a9a5SSteve French rc = smb2_new_read_req((void **)&req, &total_len, io_parms, NULL, 0, 0); 447838c8a9a5SSteve French if (rc) 447938c8a9a5SSteve French return rc; 448038c8a9a5SSteve French 448138c8a9a5SSteve French if (smb3_encryption_required(io_parms->tcon)) 448238c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 448338c8a9a5SSteve French 448438c8a9a5SSteve French iov[0].iov_base = (char *)req; 448538c8a9a5SSteve French iov[0].iov_len = total_len; 448638c8a9a5SSteve French 448738c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 448838c8a9a5SSteve French rqst.rq_iov = iov; 448938c8a9a5SSteve French rqst.rq_nvec = 1; 449038c8a9a5SSteve French 449138c8a9a5SSteve French rc = cifs_send_recv(xid, ses, io_parms->server, 449238c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 449338c8a9a5SSteve French rsp = (struct smb2_read_rsp *)rsp_iov.iov_base; 449438c8a9a5SSteve French 449538c8a9a5SSteve French if (rc) { 449638c8a9a5SSteve French if (rc != -ENODATA) { 449738c8a9a5SSteve French cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE); 449838c8a9a5SSteve French cifs_dbg(VFS, "Send error in read = %d\n", rc); 449938c8a9a5SSteve French trace_smb3_read_err(xid, 450038c8a9a5SSteve French req->PersistentFileId, 450138c8a9a5SSteve French io_parms->tcon->tid, ses->Suid, 450238c8a9a5SSteve French io_parms->offset, io_parms->length, 450338c8a9a5SSteve French rc); 450438c8a9a5SSteve French } else 450538c8a9a5SSteve French trace_smb3_read_done(xid, req->PersistentFileId, io_parms->tcon->tid, 450638c8a9a5SSteve French ses->Suid, io_parms->offset, 0); 450738c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp_iov.iov_base); 450838c8a9a5SSteve French cifs_small_buf_release(req); 450938c8a9a5SSteve French return rc == -ENODATA ? 0 : rc; 451038c8a9a5SSteve French } else 451138c8a9a5SSteve French trace_smb3_read_done(xid, 451238c8a9a5SSteve French req->PersistentFileId, 451338c8a9a5SSteve French io_parms->tcon->tid, ses->Suid, 451438c8a9a5SSteve French io_parms->offset, io_parms->length); 451538c8a9a5SSteve French 451638c8a9a5SSteve French cifs_small_buf_release(req); 451738c8a9a5SSteve French 451838c8a9a5SSteve French *nbytes = le32_to_cpu(rsp->DataLength); 451938c8a9a5SSteve French if ((*nbytes > CIFS_MAX_MSGSIZE) || 452038c8a9a5SSteve French (*nbytes > io_parms->length)) { 452138c8a9a5SSteve French cifs_dbg(FYI, "bad length %d for count %d\n", 452238c8a9a5SSteve French *nbytes, io_parms->length); 452338c8a9a5SSteve French rc = -EIO; 452438c8a9a5SSteve French *nbytes = 0; 452538c8a9a5SSteve French } 452638c8a9a5SSteve French 452738c8a9a5SSteve French if (*buf) { 452838c8a9a5SSteve French memcpy(*buf, (char *)rsp + rsp->DataOffset, *nbytes); 452938c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp_iov.iov_base); 453038c8a9a5SSteve French } else if (resp_buftype != CIFS_NO_BUFFER) { 453138c8a9a5SSteve French *buf = rsp_iov.iov_base; 453238c8a9a5SSteve French if (resp_buftype == CIFS_SMALL_BUFFER) 453338c8a9a5SSteve French *buf_type = CIFS_SMALL_BUFFER; 453438c8a9a5SSteve French else if (resp_buftype == CIFS_LARGE_BUFFER) 453538c8a9a5SSteve French *buf_type = CIFS_LARGE_BUFFER; 453638c8a9a5SSteve French } 453738c8a9a5SSteve French return rc; 453838c8a9a5SSteve French } 453938c8a9a5SSteve French 454038c8a9a5SSteve French /* 454138c8a9a5SSteve French * Check the mid_state and signature on received buffer (if any), and queue the 454238c8a9a5SSteve French * workqueue completion task. 454338c8a9a5SSteve French */ 454438c8a9a5SSteve French static void 454538c8a9a5SSteve French smb2_writev_callback(struct mid_q_entry *mid) 454638c8a9a5SSteve French { 454738c8a9a5SSteve French struct cifs_writedata *wdata = mid->callback_data; 454838c8a9a5SSteve French struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); 454938c8a9a5SSteve French struct TCP_Server_Info *server = wdata->server; 455038c8a9a5SSteve French unsigned int written; 455138c8a9a5SSteve French struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf; 455238c8a9a5SSteve French struct cifs_credits credits = { .value = 0, .instance = 0 }; 455338c8a9a5SSteve French 455438c8a9a5SSteve French WARN_ONCE(wdata->server != mid->server, 455538c8a9a5SSteve French "wdata server %p != mid server %p", 455638c8a9a5SSteve French wdata->server, mid->server); 455738c8a9a5SSteve French 455838c8a9a5SSteve French switch (mid->mid_state) { 455938c8a9a5SSteve French case MID_RESPONSE_RECEIVED: 456038c8a9a5SSteve French credits.value = le16_to_cpu(rsp->hdr.CreditRequest); 456138c8a9a5SSteve French credits.instance = server->reconnect_instance; 456238c8a9a5SSteve French wdata->result = smb2_check_receive(mid, server, 0); 456338c8a9a5SSteve French if (wdata->result != 0) 456438c8a9a5SSteve French break; 456538c8a9a5SSteve French 456638c8a9a5SSteve French written = le32_to_cpu(rsp->DataLength); 456738c8a9a5SSteve French /* 456838c8a9a5SSteve French * Mask off high 16 bits when bytes written as returned 456938c8a9a5SSteve French * by the server is greater than bytes requested by the 457038c8a9a5SSteve French * client. OS/2 servers are known to set incorrect 457138c8a9a5SSteve French * CountHigh values. 457238c8a9a5SSteve French */ 457338c8a9a5SSteve French if (written > wdata->bytes) 457438c8a9a5SSteve French written &= 0xFFFF; 457538c8a9a5SSteve French 457638c8a9a5SSteve French if (written < wdata->bytes) 457738c8a9a5SSteve French wdata->result = -ENOSPC; 457838c8a9a5SSteve French else 457938c8a9a5SSteve French wdata->bytes = written; 458038c8a9a5SSteve French break; 458138c8a9a5SSteve French case MID_REQUEST_SUBMITTED: 458238c8a9a5SSteve French case MID_RETRY_NEEDED: 458338c8a9a5SSteve French wdata->result = -EAGAIN; 458438c8a9a5SSteve French break; 458538c8a9a5SSteve French case MID_RESPONSE_MALFORMED: 458638c8a9a5SSteve French credits.value = le16_to_cpu(rsp->hdr.CreditRequest); 458738c8a9a5SSteve French credits.instance = server->reconnect_instance; 458838c8a9a5SSteve French fallthrough; 458938c8a9a5SSteve French default: 459038c8a9a5SSteve French wdata->result = -EIO; 459138c8a9a5SSteve French break; 459238c8a9a5SSteve French } 459338c8a9a5SSteve French #ifdef CONFIG_CIFS_SMB_DIRECT 459438c8a9a5SSteve French /* 459538c8a9a5SSteve French * If this wdata has a memory registered, the MR can be freed 459638c8a9a5SSteve French * The number of MRs available is limited, it's important to recover 459738c8a9a5SSteve French * used MR as soon as I/O is finished. Hold MR longer in the later 459838c8a9a5SSteve French * I/O process can possibly result in I/O deadlock due to lack of MR 459938c8a9a5SSteve French * to send request on I/O retry 460038c8a9a5SSteve French */ 460138c8a9a5SSteve French if (wdata->mr) { 460238c8a9a5SSteve French smbd_deregister_mr(wdata->mr); 460338c8a9a5SSteve French wdata->mr = NULL; 460438c8a9a5SSteve French } 460538c8a9a5SSteve French #endif 460638c8a9a5SSteve French if (wdata->result) { 460738c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); 460838c8a9a5SSteve French trace_smb3_write_err(0 /* no xid */, 460938c8a9a5SSteve French wdata->cfile->fid.persistent_fid, 461038c8a9a5SSteve French tcon->tid, tcon->ses->Suid, wdata->offset, 461138c8a9a5SSteve French wdata->bytes, wdata->result); 461238c8a9a5SSteve French if (wdata->result == -ENOSPC) 461338c8a9a5SSteve French pr_warn_once("Out of space writing to %s\n", 461438c8a9a5SSteve French tcon->tree_name); 461538c8a9a5SSteve French } else 461638c8a9a5SSteve French trace_smb3_write_done(0 /* no xid */, 461738c8a9a5SSteve French wdata->cfile->fid.persistent_fid, 461838c8a9a5SSteve French tcon->tid, tcon->ses->Suid, 461938c8a9a5SSteve French wdata->offset, wdata->bytes); 462038c8a9a5SSteve French 462138c8a9a5SSteve French queue_work(cifsiod_wq, &wdata->work); 462238c8a9a5SSteve French release_mid(mid); 462338c8a9a5SSteve French add_credits(server, &credits, 0); 462438c8a9a5SSteve French } 462538c8a9a5SSteve French 462638c8a9a5SSteve French /* smb2_async_writev - send an async write, and set up mid to handle result */ 462738c8a9a5SSteve French int 462838c8a9a5SSteve French smb2_async_writev(struct cifs_writedata *wdata, 462938c8a9a5SSteve French void (*release)(struct kref *kref)) 463038c8a9a5SSteve French { 463138c8a9a5SSteve French int rc = -EACCES, flags = 0; 463238c8a9a5SSteve French struct smb2_write_req *req = NULL; 463338c8a9a5SSteve French struct smb2_hdr *shdr; 463438c8a9a5SSteve French struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); 463538c8a9a5SSteve French struct TCP_Server_Info *server = wdata->server; 463638c8a9a5SSteve French struct kvec iov[1]; 463738c8a9a5SSteve French struct smb_rqst rqst = { }; 463838c8a9a5SSteve French unsigned int total_len; 463938c8a9a5SSteve French struct cifs_io_parms _io_parms; 464038c8a9a5SSteve French struct cifs_io_parms *io_parms = NULL; 46415e90aa21SShyam Prasad N int credit_request; 464238c8a9a5SSteve French 464338c8a9a5SSteve French if (!wdata->server) 464438c8a9a5SSteve French server = wdata->server = cifs_pick_channel(tcon->ses); 464538c8a9a5SSteve French 464638c8a9a5SSteve French /* 464738c8a9a5SSteve French * in future we may get cifs_io_parms passed in from the caller, 464838c8a9a5SSteve French * but for now we construct it here... 464938c8a9a5SSteve French */ 465038c8a9a5SSteve French _io_parms = (struct cifs_io_parms) { 465138c8a9a5SSteve French .tcon = tcon, 465238c8a9a5SSteve French .server = server, 465338c8a9a5SSteve French .offset = wdata->offset, 465438c8a9a5SSteve French .length = wdata->bytes, 465538c8a9a5SSteve French .persistent_fid = wdata->cfile->fid.persistent_fid, 465638c8a9a5SSteve French .volatile_fid = wdata->cfile->fid.volatile_fid, 465738c8a9a5SSteve French .pid = wdata->pid, 465838c8a9a5SSteve French }; 465938c8a9a5SSteve French io_parms = &_io_parms; 466038c8a9a5SSteve French 466138c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_WRITE, tcon, server, 466238c8a9a5SSteve French (void **) &req, &total_len); 466338c8a9a5SSteve French if (rc) 466438c8a9a5SSteve French return rc; 466538c8a9a5SSteve French 466638c8a9a5SSteve French if (smb3_encryption_required(tcon)) 466738c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 466838c8a9a5SSteve French 466938c8a9a5SSteve French shdr = (struct smb2_hdr *)req; 467038c8a9a5SSteve French shdr->Id.SyncId.ProcessId = cpu_to_le32(io_parms->pid); 467138c8a9a5SSteve French 467238c8a9a5SSteve French req->PersistentFileId = io_parms->persistent_fid; 467338c8a9a5SSteve French req->VolatileFileId = io_parms->volatile_fid; 467438c8a9a5SSteve French req->WriteChannelInfoOffset = 0; 467538c8a9a5SSteve French req->WriteChannelInfoLength = 0; 467638c8a9a5SSteve French req->Channel = SMB2_CHANNEL_NONE; 467738c8a9a5SSteve French req->Offset = cpu_to_le64(io_parms->offset); 467838c8a9a5SSteve French req->DataOffset = cpu_to_le16( 467938c8a9a5SSteve French offsetof(struct smb2_write_req, Buffer)); 468038c8a9a5SSteve French req->RemainingBytes = 0; 468138c8a9a5SSteve French 468238c8a9a5SSteve French trace_smb3_write_enter(0 /* xid */, 468338c8a9a5SSteve French io_parms->persistent_fid, 468438c8a9a5SSteve French io_parms->tcon->tid, 468538c8a9a5SSteve French io_parms->tcon->ses->Suid, 468638c8a9a5SSteve French io_parms->offset, 468738c8a9a5SSteve French io_parms->length); 468838c8a9a5SSteve French 468938c8a9a5SSteve French #ifdef CONFIG_CIFS_SMB_DIRECT 469038c8a9a5SSteve French /* 469138c8a9a5SSteve French * If we want to do a server RDMA read, fill in and append 469238c8a9a5SSteve French * smbd_buffer_descriptor_v1 to the end of write request 469338c8a9a5SSteve French */ 469438c8a9a5SSteve French if (smb3_use_rdma_offload(io_parms)) { 469538c8a9a5SSteve French struct smbd_buffer_descriptor_v1 *v1; 469638c8a9a5SSteve French size_t data_size = iov_iter_count(&wdata->iter); 469738c8a9a5SSteve French bool need_invalidate = server->dialect == SMB30_PROT_ID; 469838c8a9a5SSteve French 469938c8a9a5SSteve French wdata->mr = smbd_register_mr(server->smbd_conn, &wdata->iter, 470038c8a9a5SSteve French false, need_invalidate); 470138c8a9a5SSteve French if (!wdata->mr) { 470238c8a9a5SSteve French rc = -EAGAIN; 470338c8a9a5SSteve French goto async_writev_out; 470438c8a9a5SSteve French } 470538c8a9a5SSteve French req->Length = 0; 470638c8a9a5SSteve French req->DataOffset = 0; 470738c8a9a5SSteve French req->RemainingBytes = cpu_to_le32(data_size); 470838c8a9a5SSteve French req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE; 470938c8a9a5SSteve French if (need_invalidate) 471038c8a9a5SSteve French req->Channel = SMB2_CHANNEL_RDMA_V1; 471138c8a9a5SSteve French req->WriteChannelInfoOffset = 471238c8a9a5SSteve French cpu_to_le16(offsetof(struct smb2_write_req, Buffer)); 471338c8a9a5SSteve French req->WriteChannelInfoLength = 471438c8a9a5SSteve French cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1)); 471538c8a9a5SSteve French v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0]; 471638c8a9a5SSteve French v1->offset = cpu_to_le64(wdata->mr->mr->iova); 471738c8a9a5SSteve French v1->token = cpu_to_le32(wdata->mr->mr->rkey); 471838c8a9a5SSteve French v1->length = cpu_to_le32(wdata->mr->mr->length); 471938c8a9a5SSteve French } 472038c8a9a5SSteve French #endif 472138c8a9a5SSteve French iov[0].iov_len = total_len - 1; 472238c8a9a5SSteve French iov[0].iov_base = (char *)req; 472338c8a9a5SSteve French 472438c8a9a5SSteve French rqst.rq_iov = iov; 472538c8a9a5SSteve French rqst.rq_nvec = 1; 472638c8a9a5SSteve French rqst.rq_iter = wdata->iter; 472738c8a9a5SSteve French rqst.rq_iter_size = iov_iter_count(&rqst.rq_iter); 472838c8a9a5SSteve French #ifdef CONFIG_CIFS_SMB_DIRECT 472938c8a9a5SSteve French if (wdata->mr) 473038c8a9a5SSteve French iov[0].iov_len += sizeof(struct smbd_buffer_descriptor_v1); 473138c8a9a5SSteve French #endif 473238c8a9a5SSteve French cifs_dbg(FYI, "async write at %llu %u bytes iter=%zx\n", 473338c8a9a5SSteve French io_parms->offset, io_parms->length, iov_iter_count(&rqst.rq_iter)); 473438c8a9a5SSteve French 473538c8a9a5SSteve French #ifdef CONFIG_CIFS_SMB_DIRECT 473638c8a9a5SSteve French /* For RDMA read, I/O size is in RemainingBytes not in Length */ 473738c8a9a5SSteve French if (!wdata->mr) 473838c8a9a5SSteve French req->Length = cpu_to_le32(io_parms->length); 473938c8a9a5SSteve French #else 474038c8a9a5SSteve French req->Length = cpu_to_le32(io_parms->length); 474138c8a9a5SSteve French #endif 474238c8a9a5SSteve French 474338c8a9a5SSteve French if (wdata->credits.value > 0) { 474438c8a9a5SSteve French shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes, 474538c8a9a5SSteve French SMB2_MAX_BUFFER_SIZE)); 47465e90aa21SShyam Prasad N credit_request = le16_to_cpu(shdr->CreditCharge) + 8; 47475e90aa21SShyam Prasad N if (server->credits >= server->max_credits) 47485e90aa21SShyam Prasad N shdr->CreditRequest = cpu_to_le16(0); 47495e90aa21SShyam Prasad N else 47505e90aa21SShyam Prasad N shdr->CreditRequest = cpu_to_le16( 47515e90aa21SShyam Prasad N min_t(int, server->max_credits - 47525e90aa21SShyam Prasad N server->credits, credit_request)); 475338c8a9a5SSteve French 475438c8a9a5SSteve French rc = adjust_credits(server, &wdata->credits, io_parms->length); 475538c8a9a5SSteve French if (rc) 475638c8a9a5SSteve French goto async_writev_out; 475738c8a9a5SSteve French 475838c8a9a5SSteve French flags |= CIFS_HAS_CREDITS; 475938c8a9a5SSteve French } 476038c8a9a5SSteve French 476138c8a9a5SSteve French kref_get(&wdata->refcount); 476238c8a9a5SSteve French rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL, 476338c8a9a5SSteve French wdata, flags, &wdata->credits); 476438c8a9a5SSteve French 476538c8a9a5SSteve French if (rc) { 476638c8a9a5SSteve French trace_smb3_write_err(0 /* no xid */, 476738c8a9a5SSteve French io_parms->persistent_fid, 476838c8a9a5SSteve French io_parms->tcon->tid, 476938c8a9a5SSteve French io_parms->tcon->ses->Suid, 477038c8a9a5SSteve French io_parms->offset, 477138c8a9a5SSteve French io_parms->length, 477238c8a9a5SSteve French rc); 477338c8a9a5SSteve French kref_put(&wdata->refcount, release); 477438c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); 477538c8a9a5SSteve French } 477638c8a9a5SSteve French 477738c8a9a5SSteve French async_writev_out: 477838c8a9a5SSteve French cifs_small_buf_release(req); 477938c8a9a5SSteve French return rc; 478038c8a9a5SSteve French } 478138c8a9a5SSteve French 478238c8a9a5SSteve French /* 478338c8a9a5SSteve French * SMB2_write function gets iov pointer to kvec array with n_vec as a length. 478438c8a9a5SSteve French * The length field from io_parms must be at least 1 and indicates a number of 478538c8a9a5SSteve French * elements with data to write that begins with position 1 in iov array. All 478638c8a9a5SSteve French * data length is specified by count. 478738c8a9a5SSteve French */ 478838c8a9a5SSteve French int 478938c8a9a5SSteve French SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms, 479038c8a9a5SSteve French unsigned int *nbytes, struct kvec *iov, int n_vec) 479138c8a9a5SSteve French { 479238c8a9a5SSteve French struct smb_rqst rqst; 479338c8a9a5SSteve French int rc = 0; 479438c8a9a5SSteve French struct smb2_write_req *req = NULL; 479538c8a9a5SSteve French struct smb2_write_rsp *rsp = NULL; 479638c8a9a5SSteve French int resp_buftype; 479738c8a9a5SSteve French struct kvec rsp_iov; 479838c8a9a5SSteve French int flags = 0; 479938c8a9a5SSteve French unsigned int total_len; 480038c8a9a5SSteve French struct TCP_Server_Info *server; 480138c8a9a5SSteve French 480238c8a9a5SSteve French *nbytes = 0; 480338c8a9a5SSteve French 480438c8a9a5SSteve French if (n_vec < 1) 480538c8a9a5SSteve French return rc; 480638c8a9a5SSteve French 480738c8a9a5SSteve French if (!io_parms->server) 480838c8a9a5SSteve French io_parms->server = cifs_pick_channel(io_parms->tcon->ses); 480938c8a9a5SSteve French server = io_parms->server; 481038c8a9a5SSteve French if (server == NULL) 481138c8a9a5SSteve French return -ECONNABORTED; 481238c8a9a5SSteve French 481338c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_WRITE, io_parms->tcon, server, 481438c8a9a5SSteve French (void **) &req, &total_len); 481538c8a9a5SSteve French if (rc) 481638c8a9a5SSteve French return rc; 481738c8a9a5SSteve French 481838c8a9a5SSteve French if (smb3_encryption_required(io_parms->tcon)) 481938c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 482038c8a9a5SSteve French 482138c8a9a5SSteve French req->hdr.Id.SyncId.ProcessId = cpu_to_le32(io_parms->pid); 482238c8a9a5SSteve French 482338c8a9a5SSteve French req->PersistentFileId = io_parms->persistent_fid; 482438c8a9a5SSteve French req->VolatileFileId = io_parms->volatile_fid; 482538c8a9a5SSteve French req->WriteChannelInfoOffset = 0; 482638c8a9a5SSteve French req->WriteChannelInfoLength = 0; 482738c8a9a5SSteve French req->Channel = 0; 482838c8a9a5SSteve French req->Length = cpu_to_le32(io_parms->length); 482938c8a9a5SSteve French req->Offset = cpu_to_le64(io_parms->offset); 483038c8a9a5SSteve French req->DataOffset = cpu_to_le16( 483138c8a9a5SSteve French offsetof(struct smb2_write_req, Buffer)); 483238c8a9a5SSteve French req->RemainingBytes = 0; 483338c8a9a5SSteve French 483438c8a9a5SSteve French trace_smb3_write_enter(xid, io_parms->persistent_fid, 483538c8a9a5SSteve French io_parms->tcon->tid, io_parms->tcon->ses->Suid, 483638c8a9a5SSteve French io_parms->offset, io_parms->length); 483738c8a9a5SSteve French 483838c8a9a5SSteve French iov[0].iov_base = (char *)req; 483938c8a9a5SSteve French /* 1 for Buffer */ 484038c8a9a5SSteve French iov[0].iov_len = total_len - 1; 484138c8a9a5SSteve French 484238c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 484338c8a9a5SSteve French rqst.rq_iov = iov; 484438c8a9a5SSteve French rqst.rq_nvec = n_vec + 1; 484538c8a9a5SSteve French 484638c8a9a5SSteve French rc = cifs_send_recv(xid, io_parms->tcon->ses, server, 484738c8a9a5SSteve French &rqst, 484838c8a9a5SSteve French &resp_buftype, flags, &rsp_iov); 484938c8a9a5SSteve French rsp = (struct smb2_write_rsp *)rsp_iov.iov_base; 485038c8a9a5SSteve French 485138c8a9a5SSteve French if (rc) { 485238c8a9a5SSteve French trace_smb3_write_err(xid, 485338c8a9a5SSteve French req->PersistentFileId, 485438c8a9a5SSteve French io_parms->tcon->tid, 485538c8a9a5SSteve French io_parms->tcon->ses->Suid, 485638c8a9a5SSteve French io_parms->offset, io_parms->length, rc); 485738c8a9a5SSteve French cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE); 485838c8a9a5SSteve French cifs_dbg(VFS, "Send error in write = %d\n", rc); 485938c8a9a5SSteve French } else { 486038c8a9a5SSteve French *nbytes = le32_to_cpu(rsp->DataLength); 486138c8a9a5SSteve French trace_smb3_write_done(xid, 486238c8a9a5SSteve French req->PersistentFileId, 486338c8a9a5SSteve French io_parms->tcon->tid, 486438c8a9a5SSteve French io_parms->tcon->ses->Suid, 486538c8a9a5SSteve French io_parms->offset, *nbytes); 486638c8a9a5SSteve French } 486738c8a9a5SSteve French 486838c8a9a5SSteve French cifs_small_buf_release(req); 486938c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp); 487038c8a9a5SSteve French return rc; 487138c8a9a5SSteve French } 487238c8a9a5SSteve French 487338c8a9a5SSteve French int posix_info_sid_size(const void *beg, const void *end) 487438c8a9a5SSteve French { 487538c8a9a5SSteve French size_t subauth; 487638c8a9a5SSteve French int total; 487738c8a9a5SSteve French 487838c8a9a5SSteve French if (beg + 1 > end) 487938c8a9a5SSteve French return -1; 488038c8a9a5SSteve French 488138c8a9a5SSteve French subauth = *(u8 *)(beg+1); 488238c8a9a5SSteve French if (subauth < 1 || subauth > 15) 488338c8a9a5SSteve French return -1; 488438c8a9a5SSteve French 488538c8a9a5SSteve French total = 1 + 1 + 6 + 4*subauth; 488638c8a9a5SSteve French if (beg + total > end) 488738c8a9a5SSteve French return -1; 488838c8a9a5SSteve French 488938c8a9a5SSteve French return total; 489038c8a9a5SSteve French } 489138c8a9a5SSteve French 489238c8a9a5SSteve French int posix_info_parse(const void *beg, const void *end, 489338c8a9a5SSteve French struct smb2_posix_info_parsed *out) 489438c8a9a5SSteve French 489538c8a9a5SSteve French { 489638c8a9a5SSteve French int total_len = 0; 489738c8a9a5SSteve French int owner_len, group_len; 489838c8a9a5SSteve French int name_len; 489938c8a9a5SSteve French const void *owner_sid; 490038c8a9a5SSteve French const void *group_sid; 490138c8a9a5SSteve French const void *name; 490238c8a9a5SSteve French 490338c8a9a5SSteve French /* if no end bound given, assume payload to be correct */ 490438c8a9a5SSteve French if (!end) { 490538c8a9a5SSteve French const struct smb2_posix_info *p = beg; 490638c8a9a5SSteve French 490738c8a9a5SSteve French end = beg + le32_to_cpu(p->NextEntryOffset); 490838c8a9a5SSteve French /* last element will have a 0 offset, pick a sensible bound */ 490938c8a9a5SSteve French if (end == beg) 491038c8a9a5SSteve French end += 0xFFFF; 491138c8a9a5SSteve French } 491238c8a9a5SSteve French 491338c8a9a5SSteve French /* check base buf */ 491438c8a9a5SSteve French if (beg + sizeof(struct smb2_posix_info) > end) 491538c8a9a5SSteve French return -1; 491638c8a9a5SSteve French total_len = sizeof(struct smb2_posix_info); 491738c8a9a5SSteve French 491838c8a9a5SSteve French /* check owner sid */ 491938c8a9a5SSteve French owner_sid = beg + total_len; 492038c8a9a5SSteve French owner_len = posix_info_sid_size(owner_sid, end); 492138c8a9a5SSteve French if (owner_len < 0) 492238c8a9a5SSteve French return -1; 492338c8a9a5SSteve French total_len += owner_len; 492438c8a9a5SSteve French 492538c8a9a5SSteve French /* check group sid */ 492638c8a9a5SSteve French group_sid = beg + total_len; 492738c8a9a5SSteve French group_len = posix_info_sid_size(group_sid, end); 492838c8a9a5SSteve French if (group_len < 0) 492938c8a9a5SSteve French return -1; 493038c8a9a5SSteve French total_len += group_len; 493138c8a9a5SSteve French 493238c8a9a5SSteve French /* check name len */ 493338c8a9a5SSteve French if (beg + total_len + 4 > end) 493438c8a9a5SSteve French return -1; 493538c8a9a5SSteve French name_len = le32_to_cpu(*(__le32 *)(beg + total_len)); 493638c8a9a5SSteve French if (name_len < 1 || name_len > 0xFFFF) 493738c8a9a5SSteve French return -1; 493838c8a9a5SSteve French total_len += 4; 493938c8a9a5SSteve French 494038c8a9a5SSteve French /* check name */ 494138c8a9a5SSteve French name = beg + total_len; 494238c8a9a5SSteve French if (name + name_len > end) 494338c8a9a5SSteve French return -1; 494438c8a9a5SSteve French total_len += name_len; 494538c8a9a5SSteve French 494638c8a9a5SSteve French if (out) { 494738c8a9a5SSteve French out->base = beg; 494838c8a9a5SSteve French out->size = total_len; 494938c8a9a5SSteve French out->name_len = name_len; 495038c8a9a5SSteve French out->name = name; 495138c8a9a5SSteve French memcpy(&out->owner, owner_sid, owner_len); 495238c8a9a5SSteve French memcpy(&out->group, group_sid, group_len); 495338c8a9a5SSteve French } 495438c8a9a5SSteve French return total_len; 495538c8a9a5SSteve French } 495638c8a9a5SSteve French 495738c8a9a5SSteve French static int posix_info_extra_size(const void *beg, const void *end) 495838c8a9a5SSteve French { 495938c8a9a5SSteve French int len = posix_info_parse(beg, end, NULL); 496038c8a9a5SSteve French 496138c8a9a5SSteve French if (len < 0) 496238c8a9a5SSteve French return -1; 496338c8a9a5SSteve French return len - sizeof(struct smb2_posix_info); 496438c8a9a5SSteve French } 496538c8a9a5SSteve French 496638c8a9a5SSteve French static unsigned int 496738c8a9a5SSteve French num_entries(int infotype, char *bufstart, char *end_of_buf, char **lastentry, 496838c8a9a5SSteve French size_t size) 496938c8a9a5SSteve French { 497038c8a9a5SSteve French int len; 497138c8a9a5SSteve French unsigned int entrycount = 0; 497238c8a9a5SSteve French unsigned int next_offset = 0; 497338c8a9a5SSteve French char *entryptr; 497438c8a9a5SSteve French FILE_DIRECTORY_INFO *dir_info; 497538c8a9a5SSteve French 497638c8a9a5SSteve French if (bufstart == NULL) 497738c8a9a5SSteve French return 0; 497838c8a9a5SSteve French 497938c8a9a5SSteve French entryptr = bufstart; 498038c8a9a5SSteve French 498138c8a9a5SSteve French while (1) { 498238c8a9a5SSteve French if (entryptr + next_offset < entryptr || 498338c8a9a5SSteve French entryptr + next_offset > end_of_buf || 498438c8a9a5SSteve French entryptr + next_offset + size > end_of_buf) { 498538c8a9a5SSteve French cifs_dbg(VFS, "malformed search entry would overflow\n"); 498638c8a9a5SSteve French break; 498738c8a9a5SSteve French } 498838c8a9a5SSteve French 498938c8a9a5SSteve French entryptr = entryptr + next_offset; 499038c8a9a5SSteve French dir_info = (FILE_DIRECTORY_INFO *)entryptr; 499138c8a9a5SSteve French 499238c8a9a5SSteve French if (infotype == SMB_FIND_FILE_POSIX_INFO) 499338c8a9a5SSteve French len = posix_info_extra_size(entryptr, end_of_buf); 499438c8a9a5SSteve French else 499538c8a9a5SSteve French len = le32_to_cpu(dir_info->FileNameLength); 499638c8a9a5SSteve French 499738c8a9a5SSteve French if (len < 0 || 499838c8a9a5SSteve French entryptr + len < entryptr || 499938c8a9a5SSteve French entryptr + len > end_of_buf || 500038c8a9a5SSteve French entryptr + len + size > end_of_buf) { 500138c8a9a5SSteve French cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n", 500238c8a9a5SSteve French end_of_buf); 500338c8a9a5SSteve French break; 500438c8a9a5SSteve French } 500538c8a9a5SSteve French 500638c8a9a5SSteve French *lastentry = entryptr; 500738c8a9a5SSteve French entrycount++; 500838c8a9a5SSteve French 500938c8a9a5SSteve French next_offset = le32_to_cpu(dir_info->NextEntryOffset); 501038c8a9a5SSteve French if (!next_offset) 501138c8a9a5SSteve French break; 501238c8a9a5SSteve French } 501338c8a9a5SSteve French 501438c8a9a5SSteve French return entrycount; 501538c8a9a5SSteve French } 501638c8a9a5SSteve French 501738c8a9a5SSteve French /* 501838c8a9a5SSteve French * Readdir/FindFirst 501938c8a9a5SSteve French */ 502038c8a9a5SSteve French int SMB2_query_directory_init(const unsigned int xid, 502138c8a9a5SSteve French struct cifs_tcon *tcon, 502238c8a9a5SSteve French struct TCP_Server_Info *server, 502338c8a9a5SSteve French struct smb_rqst *rqst, 502438c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, 502538c8a9a5SSteve French int index, int info_level) 502638c8a9a5SSteve French { 502738c8a9a5SSteve French struct smb2_query_directory_req *req; 502838c8a9a5SSteve French unsigned char *bufptr; 502938c8a9a5SSteve French __le16 asteriks = cpu_to_le16('*'); 503038c8a9a5SSteve French unsigned int output_size = CIFSMaxBufSize - 503138c8a9a5SSteve French MAX_SMB2_CREATE_RESPONSE_SIZE - 503238c8a9a5SSteve French MAX_SMB2_CLOSE_RESPONSE_SIZE; 503338c8a9a5SSteve French unsigned int total_len; 503438c8a9a5SSteve French struct kvec *iov = rqst->rq_iov; 503538c8a9a5SSteve French int len, rc; 503638c8a9a5SSteve French 503738c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_QUERY_DIRECTORY, tcon, server, 503838c8a9a5SSteve French (void **) &req, &total_len); 503938c8a9a5SSteve French if (rc) 504038c8a9a5SSteve French return rc; 504138c8a9a5SSteve French 504238c8a9a5SSteve French switch (info_level) { 504338c8a9a5SSteve French case SMB_FIND_FILE_DIRECTORY_INFO: 504438c8a9a5SSteve French req->FileInformationClass = FILE_DIRECTORY_INFORMATION; 504538c8a9a5SSteve French break; 504638c8a9a5SSteve French case SMB_FIND_FILE_ID_FULL_DIR_INFO: 504738c8a9a5SSteve French req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION; 504838c8a9a5SSteve French break; 504938c8a9a5SSteve French case SMB_FIND_FILE_POSIX_INFO: 505038c8a9a5SSteve French req->FileInformationClass = SMB_FIND_FILE_POSIX_INFO; 505138c8a9a5SSteve French break; 505238c8a9a5SSteve French default: 505338c8a9a5SSteve French cifs_tcon_dbg(VFS, "info level %u isn't supported\n", 505438c8a9a5SSteve French info_level); 505538c8a9a5SSteve French return -EINVAL; 505638c8a9a5SSteve French } 505738c8a9a5SSteve French 505838c8a9a5SSteve French req->FileIndex = cpu_to_le32(index); 505938c8a9a5SSteve French req->PersistentFileId = persistent_fid; 506038c8a9a5SSteve French req->VolatileFileId = volatile_fid; 506138c8a9a5SSteve French 506238c8a9a5SSteve French len = 0x2; 506338c8a9a5SSteve French bufptr = req->Buffer; 506438c8a9a5SSteve French memcpy(bufptr, &asteriks, len); 506538c8a9a5SSteve French 506638c8a9a5SSteve French req->FileNameOffset = 506738c8a9a5SSteve French cpu_to_le16(sizeof(struct smb2_query_directory_req)); 506838c8a9a5SSteve French req->FileNameLength = cpu_to_le16(len); 506938c8a9a5SSteve French /* 507038c8a9a5SSteve French * BB could be 30 bytes or so longer if we used SMB2 specific 507138c8a9a5SSteve French * buffer lengths, but this is safe and close enough. 507238c8a9a5SSteve French */ 507338c8a9a5SSteve French output_size = min_t(unsigned int, output_size, server->maxBuf); 507438c8a9a5SSteve French output_size = min_t(unsigned int, output_size, 2 << 15); 507538c8a9a5SSteve French req->OutputBufferLength = cpu_to_le32(output_size); 507638c8a9a5SSteve French 507738c8a9a5SSteve French iov[0].iov_base = (char *)req; 507838c8a9a5SSteve French /* 1 for Buffer */ 507938c8a9a5SSteve French iov[0].iov_len = total_len - 1; 508038c8a9a5SSteve French 508138c8a9a5SSteve French iov[1].iov_base = (char *)(req->Buffer); 508238c8a9a5SSteve French iov[1].iov_len = len; 508338c8a9a5SSteve French 508438c8a9a5SSteve French trace_smb3_query_dir_enter(xid, persistent_fid, tcon->tid, 508538c8a9a5SSteve French tcon->ses->Suid, index, output_size); 508638c8a9a5SSteve French 508738c8a9a5SSteve French return 0; 508838c8a9a5SSteve French } 508938c8a9a5SSteve French 509038c8a9a5SSteve French void SMB2_query_directory_free(struct smb_rqst *rqst) 509138c8a9a5SSteve French { 509238c8a9a5SSteve French if (rqst && rqst->rq_iov) { 509338c8a9a5SSteve French cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */ 509438c8a9a5SSteve French } 509538c8a9a5SSteve French } 509638c8a9a5SSteve French 509738c8a9a5SSteve French int 509838c8a9a5SSteve French smb2_parse_query_directory(struct cifs_tcon *tcon, 509938c8a9a5SSteve French struct kvec *rsp_iov, 510038c8a9a5SSteve French int resp_buftype, 510138c8a9a5SSteve French struct cifs_search_info *srch_inf) 510238c8a9a5SSteve French { 510338c8a9a5SSteve French struct smb2_query_directory_rsp *rsp; 510438c8a9a5SSteve French size_t info_buf_size; 510538c8a9a5SSteve French char *end_of_smb; 510638c8a9a5SSteve French int rc; 510738c8a9a5SSteve French 510838c8a9a5SSteve French rsp = (struct smb2_query_directory_rsp *)rsp_iov->iov_base; 510938c8a9a5SSteve French 511038c8a9a5SSteve French switch (srch_inf->info_level) { 511138c8a9a5SSteve French case SMB_FIND_FILE_DIRECTORY_INFO: 511238c8a9a5SSteve French info_buf_size = sizeof(FILE_DIRECTORY_INFO); 511338c8a9a5SSteve French break; 511438c8a9a5SSteve French case SMB_FIND_FILE_ID_FULL_DIR_INFO: 511538c8a9a5SSteve French info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO); 511638c8a9a5SSteve French break; 511738c8a9a5SSteve French case SMB_FIND_FILE_POSIX_INFO: 511838c8a9a5SSteve French /* note that posix payload are variable size */ 511938c8a9a5SSteve French info_buf_size = sizeof(struct smb2_posix_info); 512038c8a9a5SSteve French break; 512138c8a9a5SSteve French default: 512238c8a9a5SSteve French cifs_tcon_dbg(VFS, "info level %u isn't supported\n", 512338c8a9a5SSteve French srch_inf->info_level); 512438c8a9a5SSteve French return -EINVAL; 512538c8a9a5SSteve French } 512638c8a9a5SSteve French 512738c8a9a5SSteve French rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 512838c8a9a5SSteve French le32_to_cpu(rsp->OutputBufferLength), rsp_iov, 512938c8a9a5SSteve French info_buf_size); 513038c8a9a5SSteve French if (rc) { 513138c8a9a5SSteve French cifs_tcon_dbg(VFS, "bad info payload"); 513238c8a9a5SSteve French return rc; 513338c8a9a5SSteve French } 513438c8a9a5SSteve French 513538c8a9a5SSteve French srch_inf->unicode = true; 513638c8a9a5SSteve French 513738c8a9a5SSteve French if (srch_inf->ntwrk_buf_start) { 513838c8a9a5SSteve French if (srch_inf->smallBuf) 513938c8a9a5SSteve French cifs_small_buf_release(srch_inf->ntwrk_buf_start); 514038c8a9a5SSteve French else 514138c8a9a5SSteve French cifs_buf_release(srch_inf->ntwrk_buf_start); 514238c8a9a5SSteve French } 514338c8a9a5SSteve French srch_inf->ntwrk_buf_start = (char *)rsp; 514438c8a9a5SSteve French srch_inf->srch_entries_start = srch_inf->last_entry = 514538c8a9a5SSteve French (char *)rsp + le16_to_cpu(rsp->OutputBufferOffset); 514638c8a9a5SSteve French end_of_smb = rsp_iov->iov_len + (char *)rsp; 514738c8a9a5SSteve French 514838c8a9a5SSteve French srch_inf->entries_in_buffer = num_entries( 514938c8a9a5SSteve French srch_inf->info_level, 515038c8a9a5SSteve French srch_inf->srch_entries_start, 515138c8a9a5SSteve French end_of_smb, 515238c8a9a5SSteve French &srch_inf->last_entry, 515338c8a9a5SSteve French info_buf_size); 515438c8a9a5SSteve French 515538c8a9a5SSteve French srch_inf->index_of_last_entry += srch_inf->entries_in_buffer; 515638c8a9a5SSteve French cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n", 515738c8a9a5SSteve French srch_inf->entries_in_buffer, srch_inf->index_of_last_entry, 515838c8a9a5SSteve French srch_inf->srch_entries_start, srch_inf->last_entry); 515938c8a9a5SSteve French if (resp_buftype == CIFS_LARGE_BUFFER) 516038c8a9a5SSteve French srch_inf->smallBuf = false; 516138c8a9a5SSteve French else if (resp_buftype == CIFS_SMALL_BUFFER) 516238c8a9a5SSteve French srch_inf->smallBuf = true; 516338c8a9a5SSteve French else 516438c8a9a5SSteve French cifs_tcon_dbg(VFS, "Invalid search buffer type\n"); 516538c8a9a5SSteve French 516638c8a9a5SSteve French return 0; 516738c8a9a5SSteve French } 516838c8a9a5SSteve French 516938c8a9a5SSteve French int 517038c8a9a5SSteve French SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon, 517138c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, int index, 517238c8a9a5SSteve French struct cifs_search_info *srch_inf) 517338c8a9a5SSteve French { 517438c8a9a5SSteve French struct smb_rqst rqst; 517538c8a9a5SSteve French struct kvec iov[SMB2_QUERY_DIRECTORY_IOV_SIZE]; 517638c8a9a5SSteve French struct smb2_query_directory_rsp *rsp = NULL; 517738c8a9a5SSteve French int resp_buftype = CIFS_NO_BUFFER; 517838c8a9a5SSteve French struct kvec rsp_iov; 517938c8a9a5SSteve French int rc = 0; 518038c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 518138c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 518238c8a9a5SSteve French int flags = 0; 518338c8a9a5SSteve French 518438c8a9a5SSteve French if (!ses || !(ses->server)) 518538c8a9a5SSteve French return -EIO; 518638c8a9a5SSteve French 518738c8a9a5SSteve French if (smb3_encryption_required(tcon)) 518838c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 518938c8a9a5SSteve French 519038c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 519138c8a9a5SSteve French memset(&iov, 0, sizeof(iov)); 519238c8a9a5SSteve French rqst.rq_iov = iov; 519338c8a9a5SSteve French rqst.rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE; 519438c8a9a5SSteve French 519538c8a9a5SSteve French rc = SMB2_query_directory_init(xid, tcon, server, 519638c8a9a5SSteve French &rqst, persistent_fid, 519738c8a9a5SSteve French volatile_fid, index, 519838c8a9a5SSteve French srch_inf->info_level); 519938c8a9a5SSteve French if (rc) 520038c8a9a5SSteve French goto qdir_exit; 520138c8a9a5SSteve French 520238c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 520338c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 520438c8a9a5SSteve French rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base; 520538c8a9a5SSteve French 520638c8a9a5SSteve French if (rc) { 520738c8a9a5SSteve French if (rc == -ENODATA && 520838c8a9a5SSteve French rsp->hdr.Status == STATUS_NO_MORE_FILES) { 520938c8a9a5SSteve French trace_smb3_query_dir_done(xid, persistent_fid, 521038c8a9a5SSteve French tcon->tid, tcon->ses->Suid, index, 0); 521138c8a9a5SSteve French srch_inf->endOfSearch = true; 521238c8a9a5SSteve French rc = 0; 521338c8a9a5SSteve French } else { 521438c8a9a5SSteve French trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid, 521538c8a9a5SSteve French tcon->ses->Suid, index, 0, rc); 521638c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE); 521738c8a9a5SSteve French } 521838c8a9a5SSteve French goto qdir_exit; 521938c8a9a5SSteve French } 522038c8a9a5SSteve French 522138c8a9a5SSteve French rc = smb2_parse_query_directory(tcon, &rsp_iov, resp_buftype, 522238c8a9a5SSteve French srch_inf); 522338c8a9a5SSteve French if (rc) { 522438c8a9a5SSteve French trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid, 522538c8a9a5SSteve French tcon->ses->Suid, index, 0, rc); 522638c8a9a5SSteve French goto qdir_exit; 522738c8a9a5SSteve French } 522838c8a9a5SSteve French resp_buftype = CIFS_NO_BUFFER; 522938c8a9a5SSteve French 523038c8a9a5SSteve French trace_smb3_query_dir_done(xid, persistent_fid, tcon->tid, 523138c8a9a5SSteve French tcon->ses->Suid, index, srch_inf->entries_in_buffer); 523238c8a9a5SSteve French 523338c8a9a5SSteve French qdir_exit: 523438c8a9a5SSteve French SMB2_query_directory_free(&rqst); 523538c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp); 523638c8a9a5SSteve French return rc; 523738c8a9a5SSteve French } 523838c8a9a5SSteve French 523938c8a9a5SSteve French int 524038c8a9a5SSteve French SMB2_set_info_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server, 524138c8a9a5SSteve French struct smb_rqst *rqst, 524238c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, u32 pid, 524338c8a9a5SSteve French u8 info_class, u8 info_type, u32 additional_info, 524438c8a9a5SSteve French void **data, unsigned int *size) 524538c8a9a5SSteve French { 524638c8a9a5SSteve French struct smb2_set_info_req *req; 524738c8a9a5SSteve French struct kvec *iov = rqst->rq_iov; 524838c8a9a5SSteve French unsigned int i, total_len; 524938c8a9a5SSteve French int rc; 525038c8a9a5SSteve French 525138c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_SET_INFO, tcon, server, 525238c8a9a5SSteve French (void **) &req, &total_len); 525338c8a9a5SSteve French if (rc) 525438c8a9a5SSteve French return rc; 525538c8a9a5SSteve French 525638c8a9a5SSteve French req->hdr.Id.SyncId.ProcessId = cpu_to_le32(pid); 525738c8a9a5SSteve French req->InfoType = info_type; 525838c8a9a5SSteve French req->FileInfoClass = info_class; 525938c8a9a5SSteve French req->PersistentFileId = persistent_fid; 526038c8a9a5SSteve French req->VolatileFileId = volatile_fid; 526138c8a9a5SSteve French req->AdditionalInformation = cpu_to_le32(additional_info); 526238c8a9a5SSteve French 526338c8a9a5SSteve French req->BufferOffset = cpu_to_le16(sizeof(struct smb2_set_info_req)); 526438c8a9a5SSteve French req->BufferLength = cpu_to_le32(*size); 526538c8a9a5SSteve French 526638c8a9a5SSteve French memcpy(req->Buffer, *data, *size); 526738c8a9a5SSteve French total_len += *size; 526838c8a9a5SSteve French 526938c8a9a5SSteve French iov[0].iov_base = (char *)req; 527038c8a9a5SSteve French /* 1 for Buffer */ 527138c8a9a5SSteve French iov[0].iov_len = total_len - 1; 527238c8a9a5SSteve French 527338c8a9a5SSteve French for (i = 1; i < rqst->rq_nvec; i++) { 527438c8a9a5SSteve French le32_add_cpu(&req->BufferLength, size[i]); 527538c8a9a5SSteve French iov[i].iov_base = (char *)data[i]; 527638c8a9a5SSteve French iov[i].iov_len = size[i]; 527738c8a9a5SSteve French } 527838c8a9a5SSteve French 527938c8a9a5SSteve French return 0; 528038c8a9a5SSteve French } 528138c8a9a5SSteve French 528238c8a9a5SSteve French void 528338c8a9a5SSteve French SMB2_set_info_free(struct smb_rqst *rqst) 528438c8a9a5SSteve French { 528538c8a9a5SSteve French if (rqst && rqst->rq_iov) 528638c8a9a5SSteve French cifs_buf_release(rqst->rq_iov[0].iov_base); /* request */ 528738c8a9a5SSteve French } 528838c8a9a5SSteve French 528938c8a9a5SSteve French static int 529038c8a9a5SSteve French send_set_info(const unsigned int xid, struct cifs_tcon *tcon, 529138c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class, 529238c8a9a5SSteve French u8 info_type, u32 additional_info, unsigned int num, 529338c8a9a5SSteve French void **data, unsigned int *size) 529438c8a9a5SSteve French { 529538c8a9a5SSteve French struct smb_rqst rqst; 529638c8a9a5SSteve French struct smb2_set_info_rsp *rsp = NULL; 529738c8a9a5SSteve French struct kvec *iov; 529838c8a9a5SSteve French struct kvec rsp_iov; 529938c8a9a5SSteve French int rc = 0; 530038c8a9a5SSteve French int resp_buftype; 530138c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 530238c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 530338c8a9a5SSteve French int flags = 0; 530438c8a9a5SSteve French 530538c8a9a5SSteve French if (!ses || !server) 530638c8a9a5SSteve French return -EIO; 530738c8a9a5SSteve French 530838c8a9a5SSteve French if (!num) 530938c8a9a5SSteve French return -EINVAL; 531038c8a9a5SSteve French 531138c8a9a5SSteve French if (smb3_encryption_required(tcon)) 531238c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 531338c8a9a5SSteve French 531438c8a9a5SSteve French iov = kmalloc_array(num, sizeof(struct kvec), GFP_KERNEL); 531538c8a9a5SSteve French if (!iov) 531638c8a9a5SSteve French return -ENOMEM; 531738c8a9a5SSteve French 531838c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 531938c8a9a5SSteve French rqst.rq_iov = iov; 532038c8a9a5SSteve French rqst.rq_nvec = num; 532138c8a9a5SSteve French 532238c8a9a5SSteve French rc = SMB2_set_info_init(tcon, server, 532338c8a9a5SSteve French &rqst, persistent_fid, volatile_fid, pid, 532438c8a9a5SSteve French info_class, info_type, additional_info, 532538c8a9a5SSteve French data, size); 532638c8a9a5SSteve French if (rc) { 532738c8a9a5SSteve French kfree(iov); 532838c8a9a5SSteve French return rc; 532938c8a9a5SSteve French } 533038c8a9a5SSteve French 533138c8a9a5SSteve French 533238c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 533338c8a9a5SSteve French &rqst, &resp_buftype, flags, 533438c8a9a5SSteve French &rsp_iov); 533538c8a9a5SSteve French SMB2_set_info_free(&rqst); 533638c8a9a5SSteve French rsp = (struct smb2_set_info_rsp *)rsp_iov.iov_base; 533738c8a9a5SSteve French 533838c8a9a5SSteve French if (rc != 0) { 533938c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE); 534038c8a9a5SSteve French trace_smb3_set_info_err(xid, persistent_fid, tcon->tid, 534138c8a9a5SSteve French ses->Suid, info_class, (__u32)info_type, rc); 534238c8a9a5SSteve French } 534338c8a9a5SSteve French 534438c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp); 534538c8a9a5SSteve French kfree(iov); 534638c8a9a5SSteve French return rc; 534738c8a9a5SSteve French } 534838c8a9a5SSteve French 534938c8a9a5SSteve French int 535038c8a9a5SSteve French SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, 535138c8a9a5SSteve French u64 volatile_fid, u32 pid, __le64 *eof) 535238c8a9a5SSteve French { 535338c8a9a5SSteve French struct smb2_file_eof_info info; 535438c8a9a5SSteve French void *data; 535538c8a9a5SSteve French unsigned int size; 535638c8a9a5SSteve French 535738c8a9a5SSteve French info.EndOfFile = *eof; 535838c8a9a5SSteve French 535938c8a9a5SSteve French data = &info; 536038c8a9a5SSteve French size = sizeof(struct smb2_file_eof_info); 536138c8a9a5SSteve French 536238c8a9a5SSteve French trace_smb3_set_eof(xid, persistent_fid, tcon->tid, tcon->ses->Suid, le64_to_cpu(*eof)); 536338c8a9a5SSteve French 536438c8a9a5SSteve French return send_set_info(xid, tcon, persistent_fid, volatile_fid, 536538c8a9a5SSteve French pid, FILE_END_OF_FILE_INFORMATION, SMB2_O_INFO_FILE, 536638c8a9a5SSteve French 0, 1, &data, &size); 536738c8a9a5SSteve French } 536838c8a9a5SSteve French 536938c8a9a5SSteve French int 537038c8a9a5SSteve French SMB2_set_acl(const unsigned int xid, struct cifs_tcon *tcon, 537138c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, 537238c8a9a5SSteve French struct cifs_ntsd *pnntsd, int pacllen, int aclflag) 537338c8a9a5SSteve French { 537438c8a9a5SSteve French return send_set_info(xid, tcon, persistent_fid, volatile_fid, 537538c8a9a5SSteve French current->tgid, 0, SMB2_O_INFO_SECURITY, aclflag, 537638c8a9a5SSteve French 1, (void **)&pnntsd, &pacllen); 537738c8a9a5SSteve French } 537838c8a9a5SSteve French 537938c8a9a5SSteve French int 538038c8a9a5SSteve French SMB2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, 538138c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, 538238c8a9a5SSteve French struct smb2_file_full_ea_info *buf, int len) 538338c8a9a5SSteve French { 538438c8a9a5SSteve French return send_set_info(xid, tcon, persistent_fid, volatile_fid, 538538c8a9a5SSteve French current->tgid, FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE, 538638c8a9a5SSteve French 0, 1, (void **)&buf, &len); 538738c8a9a5SSteve French } 538838c8a9a5SSteve French 538938c8a9a5SSteve French int 539038c8a9a5SSteve French SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon, 539138c8a9a5SSteve French const u64 persistent_fid, const u64 volatile_fid, 539238c8a9a5SSteve French __u8 oplock_level) 539338c8a9a5SSteve French { 539438c8a9a5SSteve French struct smb_rqst rqst; 539538c8a9a5SSteve French int rc; 539638c8a9a5SSteve French struct smb2_oplock_break *req = NULL; 539738c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 539838c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 539938c8a9a5SSteve French int flags = CIFS_OBREAK_OP; 540038c8a9a5SSteve French unsigned int total_len; 540138c8a9a5SSteve French struct kvec iov[1]; 540238c8a9a5SSteve French struct kvec rsp_iov; 540338c8a9a5SSteve French int resp_buf_type; 540438c8a9a5SSteve French 540538c8a9a5SSteve French cifs_dbg(FYI, "SMB2_oplock_break\n"); 540638c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, server, 540738c8a9a5SSteve French (void **) &req, &total_len); 540838c8a9a5SSteve French if (rc) 540938c8a9a5SSteve French return rc; 541038c8a9a5SSteve French 541138c8a9a5SSteve French if (smb3_encryption_required(tcon)) 541238c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 541338c8a9a5SSteve French 541438c8a9a5SSteve French req->VolatileFid = volatile_fid; 541538c8a9a5SSteve French req->PersistentFid = persistent_fid; 541638c8a9a5SSteve French req->OplockLevel = oplock_level; 541738c8a9a5SSteve French req->hdr.CreditRequest = cpu_to_le16(1); 541838c8a9a5SSteve French 541938c8a9a5SSteve French flags |= CIFS_NO_RSP_BUF; 542038c8a9a5SSteve French 542138c8a9a5SSteve French iov[0].iov_base = (char *)req; 542238c8a9a5SSteve French iov[0].iov_len = total_len; 542338c8a9a5SSteve French 542438c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 542538c8a9a5SSteve French rqst.rq_iov = iov; 542638c8a9a5SSteve French rqst.rq_nvec = 1; 542738c8a9a5SSteve French 542838c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 542938c8a9a5SSteve French &rqst, &resp_buf_type, flags, &rsp_iov); 543038c8a9a5SSteve French cifs_small_buf_release(req); 543138c8a9a5SSteve French 543238c8a9a5SSteve French if (rc) { 543338c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); 543438c8a9a5SSteve French cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc); 543538c8a9a5SSteve French } 543638c8a9a5SSteve French 543738c8a9a5SSteve French return rc; 543838c8a9a5SSteve French } 543938c8a9a5SSteve French 544038c8a9a5SSteve French void 544138c8a9a5SSteve French smb2_copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf, 544238c8a9a5SSteve French struct kstatfs *kst) 544338c8a9a5SSteve French { 544438c8a9a5SSteve French kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) * 544538c8a9a5SSteve French le32_to_cpu(pfs_inf->SectorsPerAllocationUnit); 544638c8a9a5SSteve French kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits); 544738c8a9a5SSteve French kst->f_bfree = kst->f_bavail = 544838c8a9a5SSteve French le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits); 544938c8a9a5SSteve French return; 545038c8a9a5SSteve French } 545138c8a9a5SSteve French 545238c8a9a5SSteve French static void 545338c8a9a5SSteve French copy_posix_fs_info_to_kstatfs(FILE_SYSTEM_POSIX_INFO *response_data, 545438c8a9a5SSteve French struct kstatfs *kst) 545538c8a9a5SSteve French { 545638c8a9a5SSteve French kst->f_bsize = le32_to_cpu(response_data->BlockSize); 545738c8a9a5SSteve French kst->f_blocks = le64_to_cpu(response_data->TotalBlocks); 545838c8a9a5SSteve French kst->f_bfree = le64_to_cpu(response_data->BlocksAvail); 545938c8a9a5SSteve French if (response_data->UserBlocksAvail == cpu_to_le64(-1)) 546038c8a9a5SSteve French kst->f_bavail = kst->f_bfree; 546138c8a9a5SSteve French else 546238c8a9a5SSteve French kst->f_bavail = le64_to_cpu(response_data->UserBlocksAvail); 546338c8a9a5SSteve French if (response_data->TotalFileNodes != cpu_to_le64(-1)) 546438c8a9a5SSteve French kst->f_files = le64_to_cpu(response_data->TotalFileNodes); 546538c8a9a5SSteve French if (response_data->FreeFileNodes != cpu_to_le64(-1)) 546638c8a9a5SSteve French kst->f_ffree = le64_to_cpu(response_data->FreeFileNodes); 546738c8a9a5SSteve French 546838c8a9a5SSteve French return; 546938c8a9a5SSteve French } 547038c8a9a5SSteve French 547138c8a9a5SSteve French static int 547238c8a9a5SSteve French build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, 547338c8a9a5SSteve French struct TCP_Server_Info *server, 547438c8a9a5SSteve French int level, int outbuf_len, u64 persistent_fid, 547538c8a9a5SSteve French u64 volatile_fid) 547638c8a9a5SSteve French { 547738c8a9a5SSteve French int rc; 547838c8a9a5SSteve French struct smb2_query_info_req *req; 547938c8a9a5SSteve French unsigned int total_len; 548038c8a9a5SSteve French 548138c8a9a5SSteve French cifs_dbg(FYI, "Query FSInfo level %d\n", level); 548238c8a9a5SSteve French 548338c8a9a5SSteve French if ((tcon->ses == NULL) || server == NULL) 548438c8a9a5SSteve French return -EIO; 548538c8a9a5SSteve French 548638c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, server, 548738c8a9a5SSteve French (void **) &req, &total_len); 548838c8a9a5SSteve French if (rc) 548938c8a9a5SSteve French return rc; 549038c8a9a5SSteve French 549138c8a9a5SSteve French req->InfoType = SMB2_O_INFO_FILESYSTEM; 549238c8a9a5SSteve French req->FileInfoClass = level; 549338c8a9a5SSteve French req->PersistentFileId = persistent_fid; 549438c8a9a5SSteve French req->VolatileFileId = volatile_fid; 549538c8a9a5SSteve French /* 1 for pad */ 549638c8a9a5SSteve French req->InputBufferOffset = 549738c8a9a5SSteve French cpu_to_le16(sizeof(struct smb2_query_info_req)); 549838c8a9a5SSteve French req->OutputBufferLength = cpu_to_le32( 549938c8a9a5SSteve French outbuf_len + sizeof(struct smb2_query_info_rsp)); 550038c8a9a5SSteve French 550138c8a9a5SSteve French iov->iov_base = (char *)req; 550238c8a9a5SSteve French iov->iov_len = total_len; 550338c8a9a5SSteve French return 0; 550438c8a9a5SSteve French } 550538c8a9a5SSteve French 55063b5f0d0aSPaulo Alcantara static inline void free_qfs_info_req(struct kvec *iov) 55073b5f0d0aSPaulo Alcantara { 55083b5f0d0aSPaulo Alcantara cifs_buf_release(iov->iov_base); 55093b5f0d0aSPaulo Alcantara } 55103b5f0d0aSPaulo Alcantara 551138c8a9a5SSteve French int 551238c8a9a5SSteve French SMB311_posix_qfs_info(const unsigned int xid, struct cifs_tcon *tcon, 551338c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata) 551438c8a9a5SSteve French { 551538c8a9a5SSteve French struct smb_rqst rqst; 551638c8a9a5SSteve French struct smb2_query_info_rsp *rsp = NULL; 551738c8a9a5SSteve French struct kvec iov; 551838c8a9a5SSteve French struct kvec rsp_iov; 551938c8a9a5SSteve French int rc = 0; 552038c8a9a5SSteve French int resp_buftype; 552138c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 552238c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 552338c8a9a5SSteve French FILE_SYSTEM_POSIX_INFO *info = NULL; 552438c8a9a5SSteve French int flags = 0; 552538c8a9a5SSteve French 552638c8a9a5SSteve French rc = build_qfs_info_req(&iov, tcon, server, 552738c8a9a5SSteve French FS_POSIX_INFORMATION, 552838c8a9a5SSteve French sizeof(FILE_SYSTEM_POSIX_INFO), 552938c8a9a5SSteve French persistent_fid, volatile_fid); 553038c8a9a5SSteve French if (rc) 553138c8a9a5SSteve French return rc; 553238c8a9a5SSteve French 553338c8a9a5SSteve French if (smb3_encryption_required(tcon)) 553438c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 553538c8a9a5SSteve French 553638c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 553738c8a9a5SSteve French rqst.rq_iov = &iov; 553838c8a9a5SSteve French rqst.rq_nvec = 1; 553938c8a9a5SSteve French 554038c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 554138c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 55423b5f0d0aSPaulo Alcantara free_qfs_info_req(&iov); 554338c8a9a5SSteve French if (rc) { 554438c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); 554538c8a9a5SSteve French goto posix_qfsinf_exit; 554638c8a9a5SSteve French } 554738c8a9a5SSteve French rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 554838c8a9a5SSteve French 554938c8a9a5SSteve French info = (FILE_SYSTEM_POSIX_INFO *)( 555038c8a9a5SSteve French le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 555138c8a9a5SSteve French rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 555238c8a9a5SSteve French le32_to_cpu(rsp->OutputBufferLength), &rsp_iov, 555338c8a9a5SSteve French sizeof(FILE_SYSTEM_POSIX_INFO)); 555438c8a9a5SSteve French if (!rc) 555538c8a9a5SSteve French copy_posix_fs_info_to_kstatfs(info, fsdata); 555638c8a9a5SSteve French 555738c8a9a5SSteve French posix_qfsinf_exit: 555838c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp_iov.iov_base); 555938c8a9a5SSteve French return rc; 556038c8a9a5SSteve French } 556138c8a9a5SSteve French 556238c8a9a5SSteve French int 556338c8a9a5SSteve French SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon, 556438c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata) 556538c8a9a5SSteve French { 556638c8a9a5SSteve French struct smb_rqst rqst; 556738c8a9a5SSteve French struct smb2_query_info_rsp *rsp = NULL; 556838c8a9a5SSteve French struct kvec iov; 556938c8a9a5SSteve French struct kvec rsp_iov; 557038c8a9a5SSteve French int rc = 0; 557138c8a9a5SSteve French int resp_buftype; 557238c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 557338c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 557438c8a9a5SSteve French struct smb2_fs_full_size_info *info = NULL; 557538c8a9a5SSteve French int flags = 0; 557638c8a9a5SSteve French 557738c8a9a5SSteve French rc = build_qfs_info_req(&iov, tcon, server, 557838c8a9a5SSteve French FS_FULL_SIZE_INFORMATION, 557938c8a9a5SSteve French sizeof(struct smb2_fs_full_size_info), 558038c8a9a5SSteve French persistent_fid, volatile_fid); 558138c8a9a5SSteve French if (rc) 558238c8a9a5SSteve French return rc; 558338c8a9a5SSteve French 558438c8a9a5SSteve French if (smb3_encryption_required(tcon)) 558538c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 558638c8a9a5SSteve French 558738c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 558838c8a9a5SSteve French rqst.rq_iov = &iov; 558938c8a9a5SSteve French rqst.rq_nvec = 1; 559038c8a9a5SSteve French 559138c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 559238c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 55933b5f0d0aSPaulo Alcantara free_qfs_info_req(&iov); 559438c8a9a5SSteve French if (rc) { 559538c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); 559638c8a9a5SSteve French goto qfsinf_exit; 559738c8a9a5SSteve French } 559838c8a9a5SSteve French rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 559938c8a9a5SSteve French 560038c8a9a5SSteve French info = (struct smb2_fs_full_size_info *)( 560138c8a9a5SSteve French le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 560238c8a9a5SSteve French rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 560338c8a9a5SSteve French le32_to_cpu(rsp->OutputBufferLength), &rsp_iov, 560438c8a9a5SSteve French sizeof(struct smb2_fs_full_size_info)); 560538c8a9a5SSteve French if (!rc) 560638c8a9a5SSteve French smb2_copy_fs_info_to_kstatfs(info, fsdata); 560738c8a9a5SSteve French 560838c8a9a5SSteve French qfsinf_exit: 560938c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp_iov.iov_base); 561038c8a9a5SSteve French return rc; 561138c8a9a5SSteve French } 561238c8a9a5SSteve French 561338c8a9a5SSteve French int 561438c8a9a5SSteve French SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon, 561538c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, int level) 561638c8a9a5SSteve French { 561738c8a9a5SSteve French struct smb_rqst rqst; 561838c8a9a5SSteve French struct smb2_query_info_rsp *rsp = NULL; 561938c8a9a5SSteve French struct kvec iov; 562038c8a9a5SSteve French struct kvec rsp_iov; 562138c8a9a5SSteve French int rc = 0; 562238c8a9a5SSteve French int resp_buftype, max_len, min_len; 562338c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 562438c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 562538c8a9a5SSteve French unsigned int rsp_len, offset; 562638c8a9a5SSteve French int flags = 0; 562738c8a9a5SSteve French 562838c8a9a5SSteve French if (level == FS_DEVICE_INFORMATION) { 562938c8a9a5SSteve French max_len = sizeof(FILE_SYSTEM_DEVICE_INFO); 563038c8a9a5SSteve French min_len = sizeof(FILE_SYSTEM_DEVICE_INFO); 563138c8a9a5SSteve French } else if (level == FS_ATTRIBUTE_INFORMATION) { 563238c8a9a5SSteve French max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO); 563338c8a9a5SSteve French min_len = MIN_FS_ATTR_INFO_SIZE; 563438c8a9a5SSteve French } else if (level == FS_SECTOR_SIZE_INFORMATION) { 563538c8a9a5SSteve French max_len = sizeof(struct smb3_fs_ss_info); 563638c8a9a5SSteve French min_len = sizeof(struct smb3_fs_ss_info); 563738c8a9a5SSteve French } else if (level == FS_VOLUME_INFORMATION) { 563838c8a9a5SSteve French max_len = sizeof(struct smb3_fs_vol_info) + MAX_VOL_LABEL_LEN; 563938c8a9a5SSteve French min_len = sizeof(struct smb3_fs_vol_info); 564038c8a9a5SSteve French } else { 564138c8a9a5SSteve French cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level); 564238c8a9a5SSteve French return -EINVAL; 564338c8a9a5SSteve French } 564438c8a9a5SSteve French 564538c8a9a5SSteve French rc = build_qfs_info_req(&iov, tcon, server, 564638c8a9a5SSteve French level, max_len, 564738c8a9a5SSteve French persistent_fid, volatile_fid); 564838c8a9a5SSteve French if (rc) 564938c8a9a5SSteve French return rc; 565038c8a9a5SSteve French 565138c8a9a5SSteve French if (smb3_encryption_required(tcon)) 565238c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 565338c8a9a5SSteve French 565438c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 565538c8a9a5SSteve French rqst.rq_iov = &iov; 565638c8a9a5SSteve French rqst.rq_nvec = 1; 565738c8a9a5SSteve French 565838c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 565938c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 56603b5f0d0aSPaulo Alcantara free_qfs_info_req(&iov); 566138c8a9a5SSteve French if (rc) { 566238c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); 566338c8a9a5SSteve French goto qfsattr_exit; 566438c8a9a5SSteve French } 566538c8a9a5SSteve French rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 566638c8a9a5SSteve French 566738c8a9a5SSteve French rsp_len = le32_to_cpu(rsp->OutputBufferLength); 566838c8a9a5SSteve French offset = le16_to_cpu(rsp->OutputBufferOffset); 566938c8a9a5SSteve French rc = smb2_validate_iov(offset, rsp_len, &rsp_iov, min_len); 567038c8a9a5SSteve French if (rc) 567138c8a9a5SSteve French goto qfsattr_exit; 567238c8a9a5SSteve French 567338c8a9a5SSteve French if (level == FS_ATTRIBUTE_INFORMATION) 567438c8a9a5SSteve French memcpy(&tcon->fsAttrInfo, offset 567538c8a9a5SSteve French + (char *)rsp, min_t(unsigned int, 567638c8a9a5SSteve French rsp_len, max_len)); 567738c8a9a5SSteve French else if (level == FS_DEVICE_INFORMATION) 567838c8a9a5SSteve French memcpy(&tcon->fsDevInfo, offset 567938c8a9a5SSteve French + (char *)rsp, sizeof(FILE_SYSTEM_DEVICE_INFO)); 568038c8a9a5SSteve French else if (level == FS_SECTOR_SIZE_INFORMATION) { 568138c8a9a5SSteve French struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *) 568238c8a9a5SSteve French (offset + (char *)rsp); 568338c8a9a5SSteve French tcon->ss_flags = le32_to_cpu(ss_info->Flags); 568438c8a9a5SSteve French tcon->perf_sector_size = 568538c8a9a5SSteve French le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf); 568638c8a9a5SSteve French } else if (level == FS_VOLUME_INFORMATION) { 568738c8a9a5SSteve French struct smb3_fs_vol_info *vol_info = (struct smb3_fs_vol_info *) 568838c8a9a5SSteve French (offset + (char *)rsp); 568938c8a9a5SSteve French tcon->vol_serial_number = vol_info->VolumeSerialNumber; 569038c8a9a5SSteve French tcon->vol_create_time = vol_info->VolumeCreationTime; 569138c8a9a5SSteve French } 569238c8a9a5SSteve French 569338c8a9a5SSteve French qfsattr_exit: 569438c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp_iov.iov_base); 569538c8a9a5SSteve French return rc; 569638c8a9a5SSteve French } 569738c8a9a5SSteve French 569838c8a9a5SSteve French int 569938c8a9a5SSteve French smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon, 570038c8a9a5SSteve French const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, 570138c8a9a5SSteve French const __u32 num_lock, struct smb2_lock_element *buf) 570238c8a9a5SSteve French { 570338c8a9a5SSteve French struct smb_rqst rqst; 570438c8a9a5SSteve French int rc = 0; 570538c8a9a5SSteve French struct smb2_lock_req *req = NULL; 570638c8a9a5SSteve French struct kvec iov[2]; 570738c8a9a5SSteve French struct kvec rsp_iov; 570838c8a9a5SSteve French int resp_buf_type; 570938c8a9a5SSteve French unsigned int count; 571038c8a9a5SSteve French int flags = CIFS_NO_RSP_BUF; 571138c8a9a5SSteve French unsigned int total_len; 571238c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses); 571338c8a9a5SSteve French 571438c8a9a5SSteve French cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock); 571538c8a9a5SSteve French 571638c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_LOCK, tcon, server, 571738c8a9a5SSteve French (void **) &req, &total_len); 571838c8a9a5SSteve French if (rc) 571938c8a9a5SSteve French return rc; 572038c8a9a5SSteve French 572138c8a9a5SSteve French if (smb3_encryption_required(tcon)) 572238c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 572338c8a9a5SSteve French 572438c8a9a5SSteve French req->hdr.Id.SyncId.ProcessId = cpu_to_le32(pid); 572538c8a9a5SSteve French req->LockCount = cpu_to_le16(num_lock); 572638c8a9a5SSteve French 572738c8a9a5SSteve French req->PersistentFileId = persist_fid; 572838c8a9a5SSteve French req->VolatileFileId = volatile_fid; 572938c8a9a5SSteve French 573038c8a9a5SSteve French count = num_lock * sizeof(struct smb2_lock_element); 573138c8a9a5SSteve French 573238c8a9a5SSteve French iov[0].iov_base = (char *)req; 573338c8a9a5SSteve French iov[0].iov_len = total_len - sizeof(struct smb2_lock_element); 573438c8a9a5SSteve French iov[1].iov_base = (char *)buf; 573538c8a9a5SSteve French iov[1].iov_len = count; 573638c8a9a5SSteve French 573738c8a9a5SSteve French cifs_stats_inc(&tcon->stats.cifs_stats.num_locks); 573838c8a9a5SSteve French 573938c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 574038c8a9a5SSteve French rqst.rq_iov = iov; 574138c8a9a5SSteve French rqst.rq_nvec = 2; 574238c8a9a5SSteve French 574338c8a9a5SSteve French rc = cifs_send_recv(xid, tcon->ses, server, 574438c8a9a5SSteve French &rqst, &resp_buf_type, flags, 574538c8a9a5SSteve French &rsp_iov); 574638c8a9a5SSteve French cifs_small_buf_release(req); 574738c8a9a5SSteve French if (rc) { 574838c8a9a5SSteve French cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc); 574938c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_LOCK_HE); 575038c8a9a5SSteve French trace_smb3_lock_err(xid, persist_fid, tcon->tid, 575138c8a9a5SSteve French tcon->ses->Suid, rc); 575238c8a9a5SSteve French } 575338c8a9a5SSteve French 575438c8a9a5SSteve French return rc; 575538c8a9a5SSteve French } 575638c8a9a5SSteve French 575738c8a9a5SSteve French int 575838c8a9a5SSteve French SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon, 575938c8a9a5SSteve French const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, 576038c8a9a5SSteve French const __u64 length, const __u64 offset, const __u32 lock_flags, 576138c8a9a5SSteve French const bool wait) 576238c8a9a5SSteve French { 576338c8a9a5SSteve French struct smb2_lock_element lock; 576438c8a9a5SSteve French 576538c8a9a5SSteve French lock.Offset = cpu_to_le64(offset); 576638c8a9a5SSteve French lock.Length = cpu_to_le64(length); 576738c8a9a5SSteve French lock.Flags = cpu_to_le32(lock_flags); 576838c8a9a5SSteve French if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK) 576938c8a9a5SSteve French lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY); 577038c8a9a5SSteve French 577138c8a9a5SSteve French return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock); 577238c8a9a5SSteve French } 577338c8a9a5SSteve French 577438c8a9a5SSteve French int 577538c8a9a5SSteve French SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon, 577638c8a9a5SSteve French __u8 *lease_key, const __le32 lease_state) 577738c8a9a5SSteve French { 577838c8a9a5SSteve French struct smb_rqst rqst; 577938c8a9a5SSteve French int rc; 578038c8a9a5SSteve French struct smb2_lease_ack *req = NULL; 578138c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 578238c8a9a5SSteve French int flags = CIFS_OBREAK_OP; 578338c8a9a5SSteve French unsigned int total_len; 578438c8a9a5SSteve French struct kvec iov[1]; 578538c8a9a5SSteve French struct kvec rsp_iov; 578638c8a9a5SSteve French int resp_buf_type; 578738c8a9a5SSteve French __u64 *please_key_high; 578838c8a9a5SSteve French __u64 *please_key_low; 578938c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses); 579038c8a9a5SSteve French 579138c8a9a5SSteve French cifs_dbg(FYI, "SMB2_lease_break\n"); 579238c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, server, 579338c8a9a5SSteve French (void **) &req, &total_len); 579438c8a9a5SSteve French if (rc) 579538c8a9a5SSteve French return rc; 579638c8a9a5SSteve French 579738c8a9a5SSteve French if (smb3_encryption_required(tcon)) 579838c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 579938c8a9a5SSteve French 580038c8a9a5SSteve French req->hdr.CreditRequest = cpu_to_le16(1); 580138c8a9a5SSteve French req->StructureSize = cpu_to_le16(36); 580238c8a9a5SSteve French total_len += 12; 580338c8a9a5SSteve French 580438c8a9a5SSteve French memcpy(req->LeaseKey, lease_key, 16); 580538c8a9a5SSteve French req->LeaseState = lease_state; 580638c8a9a5SSteve French 580738c8a9a5SSteve French flags |= CIFS_NO_RSP_BUF; 580838c8a9a5SSteve French 580938c8a9a5SSteve French iov[0].iov_base = (char *)req; 581038c8a9a5SSteve French iov[0].iov_len = total_len; 581138c8a9a5SSteve French 581238c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 581338c8a9a5SSteve French rqst.rq_iov = iov; 581438c8a9a5SSteve French rqst.rq_nvec = 1; 581538c8a9a5SSteve French 581638c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 581738c8a9a5SSteve French &rqst, &resp_buf_type, flags, &rsp_iov); 581838c8a9a5SSteve French cifs_small_buf_release(req); 581938c8a9a5SSteve French 582038c8a9a5SSteve French please_key_low = (__u64 *)lease_key; 582138c8a9a5SSteve French please_key_high = (__u64 *)(lease_key+8); 582238c8a9a5SSteve French if (rc) { 582338c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); 582438c8a9a5SSteve French trace_smb3_lease_err(le32_to_cpu(lease_state), tcon->tid, 582538c8a9a5SSteve French ses->Suid, *please_key_low, *please_key_high, rc); 582638c8a9a5SSteve French cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc); 582738c8a9a5SSteve French } else 582838c8a9a5SSteve French trace_smb3_lease_done(le32_to_cpu(lease_state), tcon->tid, 582938c8a9a5SSteve French ses->Suid, *please_key_low, *please_key_high); 583038c8a9a5SSteve French 583138c8a9a5SSteve French return rc; 583238c8a9a5SSteve French } 5833