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; 9238c8a9a5SSteve French shdr->ProtocolId = SMB2_PROTO_NUMBER; 9338c8a9a5SSteve French shdr->StructureSize = cpu_to_le16(64); 9438c8a9a5SSteve French shdr->Command = smb2_cmd; 9509ee7a3bSSteve French if (server->dialect >= SMB30_PROT_ID) { 9609ee7a3bSSteve French /* After reconnect SMB3 must set ChannelSequence on subsequent reqs */ 9709ee7a3bSSteve French smb3_hdr = (struct smb3_hdr_req *)shdr; 9809ee7a3bSSteve French /* if primary channel is not set yet, use default channel for chan sequence num */ 99*b3773b19SSteve French if (SERVER_IS_CHAN(server)) 10009ee7a3bSSteve French smb3_hdr->ChannelSequence = 10109ee7a3bSSteve French cpu_to_le16(server->primary_server->channel_sequence_num); 10209ee7a3bSSteve French else 10309ee7a3bSSteve French smb3_hdr->ChannelSequence = cpu_to_le16(server->channel_sequence_num); 10409ee7a3bSSteve French } 10538c8a9a5SSteve French if (server) { 10638c8a9a5SSteve French spin_lock(&server->req_lock); 10738c8a9a5SSteve French /* Request up to 10 credits but don't go over the limit. */ 10838c8a9a5SSteve French if (server->credits >= server->max_credits) 10938c8a9a5SSteve French shdr->CreditRequest = cpu_to_le16(0); 11038c8a9a5SSteve French else 11138c8a9a5SSteve French shdr->CreditRequest = cpu_to_le16( 11238c8a9a5SSteve French min_t(int, server->max_credits - 11338c8a9a5SSteve French server->credits, 10)); 11438c8a9a5SSteve French spin_unlock(&server->req_lock); 11538c8a9a5SSteve French } else { 11638c8a9a5SSteve French shdr->CreditRequest = cpu_to_le16(2); 11738c8a9a5SSteve French } 11838c8a9a5SSteve French shdr->Id.SyncId.ProcessId = cpu_to_le32((__u16)current->tgid); 11938c8a9a5SSteve French 12038c8a9a5SSteve French if (!tcon) 12138c8a9a5SSteve French goto out; 12238c8a9a5SSteve French 12338c8a9a5SSteve French /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */ 12438c8a9a5SSteve French /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */ 12538c8a9a5SSteve French if (server && (server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) 12638c8a9a5SSteve French shdr->CreditCharge = cpu_to_le16(1); 12738c8a9a5SSteve French /* else CreditCharge MBZ */ 12838c8a9a5SSteve French 12938c8a9a5SSteve French shdr->Id.SyncId.TreeId = cpu_to_le32(tcon->tid); 13038c8a9a5SSteve French /* Uid is not converted */ 13138c8a9a5SSteve French if (tcon->ses) 13238c8a9a5SSteve French shdr->SessionId = cpu_to_le64(tcon->ses->Suid); 13338c8a9a5SSteve French 13438c8a9a5SSteve French /* 13538c8a9a5SSteve French * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have 13638c8a9a5SSteve French * to pass the path on the Open SMB prefixed by \\server\share. 13738c8a9a5SSteve French * Not sure when we would need to do the augmented path (if ever) and 13838c8a9a5SSteve French * setting this flag breaks the SMB2 open operation since it is 13938c8a9a5SSteve French * illegal to send an empty path name (without \\server\share prefix) 14038c8a9a5SSteve French * when the DFS flag is set in the SMB open header. We could 14138c8a9a5SSteve French * consider setting the flag on all operations other than open 14238c8a9a5SSteve French * but it is safer to net set it for now. 14338c8a9a5SSteve French */ 14438c8a9a5SSteve French /* if (tcon->share_flags & SHI1005_FLAGS_DFS) 14538c8a9a5SSteve French shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */ 14638c8a9a5SSteve French 14738c8a9a5SSteve French if (server && server->sign && !smb3_encryption_required(tcon)) 14838c8a9a5SSteve French shdr->Flags |= SMB2_FLAGS_SIGNED; 14938c8a9a5SSteve French out: 15038c8a9a5SSteve French return; 15138c8a9a5SSteve French } 15238c8a9a5SSteve French 15338c8a9a5SSteve French static int 15438c8a9a5SSteve French smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon, 15538c8a9a5SSteve French struct TCP_Server_Info *server) 15638c8a9a5SSteve French { 15738c8a9a5SSteve French int rc = 0; 15838c8a9a5SSteve French struct nls_table *nls_codepage = NULL; 15938c8a9a5SSteve French struct cifs_ses *ses; 16038c8a9a5SSteve French 16138c8a9a5SSteve French /* 16238c8a9a5SSteve French * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so 16338c8a9a5SSteve French * check for tcp and smb session status done differently 16438c8a9a5SSteve French * for those three - in the calling routine. 16538c8a9a5SSteve French */ 16638c8a9a5SSteve French if (tcon == NULL) 16738c8a9a5SSteve French return 0; 16838c8a9a5SSteve French 16938c8a9a5SSteve French /* 17038c8a9a5SSteve French * Need to also skip SMB2_IOCTL because it is used for checking nested dfs links in 17138c8a9a5SSteve French * cifs_tree_connect(). 17238c8a9a5SSteve French */ 17338c8a9a5SSteve French if (smb2_command == SMB2_TREE_CONNECT || smb2_command == SMB2_IOCTL) 17438c8a9a5SSteve French return 0; 17538c8a9a5SSteve French 17638c8a9a5SSteve French spin_lock(&tcon->tc_lock); 17738c8a9a5SSteve French if (tcon->status == TID_EXITING) { 17838c8a9a5SSteve French /* 17938c8a9a5SSteve French * only tree disconnect allowed when disconnecting ... 18038c8a9a5SSteve French */ 18138c8a9a5SSteve French if (smb2_command != SMB2_TREE_DISCONNECT) { 18238c8a9a5SSteve French spin_unlock(&tcon->tc_lock); 18338c8a9a5SSteve French cifs_dbg(FYI, "can not send cmd %d while umounting\n", 18438c8a9a5SSteve French smb2_command); 18538c8a9a5SSteve French return -ENODEV; 18638c8a9a5SSteve French } 18738c8a9a5SSteve French } 18838c8a9a5SSteve French spin_unlock(&tcon->tc_lock); 18938c8a9a5SSteve French 19038c8a9a5SSteve French ses = tcon->ses; 19138c8a9a5SSteve French if (!ses) 19238c8a9a5SSteve French return -EIO; 19338c8a9a5SSteve French spin_lock(&ses->ses_lock); 19438c8a9a5SSteve French if (ses->ses_status == SES_EXITING) { 19538c8a9a5SSteve French spin_unlock(&ses->ses_lock); 19638c8a9a5SSteve French return -EIO; 19738c8a9a5SSteve French } 19838c8a9a5SSteve French spin_unlock(&ses->ses_lock); 19938c8a9a5SSteve French if (!ses->server || !server) 20038c8a9a5SSteve French return -EIO; 20138c8a9a5SSteve French 20238c8a9a5SSteve French spin_lock(&server->srv_lock); 20338c8a9a5SSteve French if (server->tcpStatus == CifsNeedReconnect) { 20438c8a9a5SSteve French /* 20538c8a9a5SSteve French * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE 20638c8a9a5SSteve French * here since they are implicitly done when session drops. 20738c8a9a5SSteve French */ 20838c8a9a5SSteve French switch (smb2_command) { 20938c8a9a5SSteve French /* 21038c8a9a5SSteve French * BB Should we keep oplock break and add flush to exceptions? 21138c8a9a5SSteve French */ 21238c8a9a5SSteve French case SMB2_TREE_DISCONNECT: 21338c8a9a5SSteve French case SMB2_CANCEL: 21438c8a9a5SSteve French case SMB2_CLOSE: 21538c8a9a5SSteve French case SMB2_OPLOCK_BREAK: 21638c8a9a5SSteve French spin_unlock(&server->srv_lock); 21738c8a9a5SSteve French return -EAGAIN; 21838c8a9a5SSteve French } 21938c8a9a5SSteve French } 22038c8a9a5SSteve French spin_unlock(&server->srv_lock); 22138c8a9a5SSteve French 22238c8a9a5SSteve French again: 22338c8a9a5SSteve French rc = cifs_wait_for_server_reconnect(server, tcon->retry); 22438c8a9a5SSteve French if (rc) 22538c8a9a5SSteve French return rc; 22638c8a9a5SSteve French 22738c8a9a5SSteve French spin_lock(&ses->chan_lock); 22838c8a9a5SSteve French if (!cifs_chan_needs_reconnect(ses, server) && !tcon->need_reconnect) { 22938c8a9a5SSteve French spin_unlock(&ses->chan_lock); 23038c8a9a5SSteve French return 0; 23138c8a9a5SSteve French } 23238c8a9a5SSteve French spin_unlock(&ses->chan_lock); 23338c8a9a5SSteve French cifs_dbg(FYI, "sess reconnect mask: 0x%lx, tcon reconnect: %d", 23438c8a9a5SSteve French tcon->ses->chans_need_reconnect, 23538c8a9a5SSteve French tcon->need_reconnect); 23638c8a9a5SSteve French 23738c8a9a5SSteve French mutex_lock(&ses->session_mutex); 23838c8a9a5SSteve French /* 23938c8a9a5SSteve French * Recheck after acquire mutex. If another thread is negotiating 24038c8a9a5SSteve French * and the server never sends an answer the socket will be closed 24138c8a9a5SSteve French * and tcpStatus set to reconnect. 24238c8a9a5SSteve French */ 24338c8a9a5SSteve French spin_lock(&server->srv_lock); 24438c8a9a5SSteve French if (server->tcpStatus == CifsNeedReconnect) { 24538c8a9a5SSteve French spin_unlock(&server->srv_lock); 24638c8a9a5SSteve French mutex_unlock(&ses->session_mutex); 24738c8a9a5SSteve French 24838c8a9a5SSteve French if (tcon->retry) 24938c8a9a5SSteve French goto again; 25038c8a9a5SSteve French 25138c8a9a5SSteve French rc = -EHOSTDOWN; 25238c8a9a5SSteve French goto out; 25338c8a9a5SSteve French } 25438c8a9a5SSteve French spin_unlock(&server->srv_lock); 25538c8a9a5SSteve French 256a43f95fdSWinston Wen nls_codepage = ses->local_nls; 25738c8a9a5SSteve French 25838c8a9a5SSteve French /* 25938c8a9a5SSteve French * need to prevent multiple threads trying to simultaneously 26038c8a9a5SSteve French * reconnect the same SMB session 26138c8a9a5SSteve French */ 26238c8a9a5SSteve French spin_lock(&ses->ses_lock); 26338c8a9a5SSteve French spin_lock(&ses->chan_lock); 26438c8a9a5SSteve French if (!cifs_chan_needs_reconnect(ses, server) && 26538c8a9a5SSteve French ses->ses_status == SES_GOOD) { 26638c8a9a5SSteve French spin_unlock(&ses->chan_lock); 26738c8a9a5SSteve French spin_unlock(&ses->ses_lock); 26838c8a9a5SSteve French /* this means that we only need to tree connect */ 26938c8a9a5SSteve French if (tcon->need_reconnect) 27038c8a9a5SSteve French goto skip_sess_setup; 27138c8a9a5SSteve French 27238c8a9a5SSteve French mutex_unlock(&ses->session_mutex); 27338c8a9a5SSteve French goto out; 27438c8a9a5SSteve French } 27538c8a9a5SSteve French spin_unlock(&ses->chan_lock); 27638c8a9a5SSteve French spin_unlock(&ses->ses_lock); 27738c8a9a5SSteve French 27838c8a9a5SSteve French rc = cifs_negotiate_protocol(0, ses, server); 27938c8a9a5SSteve French if (!rc) { 28038c8a9a5SSteve French rc = cifs_setup_session(0, ses, server, nls_codepage); 28138c8a9a5SSteve French if ((rc == -EACCES) && !tcon->retry) { 28238c8a9a5SSteve French mutex_unlock(&ses->session_mutex); 28338c8a9a5SSteve French rc = -EHOSTDOWN; 28438c8a9a5SSteve French goto failed; 28538c8a9a5SSteve French } else if (rc) { 28638c8a9a5SSteve French mutex_unlock(&ses->session_mutex); 28738c8a9a5SSteve French goto out; 28838c8a9a5SSteve French } 28938c8a9a5SSteve French } else { 29038c8a9a5SSteve French mutex_unlock(&ses->session_mutex); 29138c8a9a5SSteve French goto out; 29238c8a9a5SSteve French } 29338c8a9a5SSteve French 29438c8a9a5SSteve French skip_sess_setup: 29538c8a9a5SSteve French if (!tcon->need_reconnect) { 29638c8a9a5SSteve French mutex_unlock(&ses->session_mutex); 29738c8a9a5SSteve French goto out; 29838c8a9a5SSteve French } 29938c8a9a5SSteve French cifs_mark_open_files_invalid(tcon); 30038c8a9a5SSteve French if (tcon->use_persistent) 30138c8a9a5SSteve French tcon->need_reopen_files = true; 30238c8a9a5SSteve French 30338c8a9a5SSteve French rc = cifs_tree_connect(0, tcon, nls_codepage); 30438c8a9a5SSteve French mutex_unlock(&ses->session_mutex); 30538c8a9a5SSteve French 30638c8a9a5SSteve French cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc); 30738c8a9a5SSteve French if (rc) { 30838c8a9a5SSteve French /* If sess reconnected but tcon didn't, something strange ... */ 30938c8a9a5SSteve French cifs_dbg(VFS, "reconnect tcon failed rc = %d\n", rc); 31038c8a9a5SSteve French goto out; 31138c8a9a5SSteve French } 31238c8a9a5SSteve French 31338c8a9a5SSteve French if (smb2_command != SMB2_INTERNAL_CMD) 31438c8a9a5SSteve French mod_delayed_work(cifsiod_wq, &server->reconnect, 0); 31538c8a9a5SSteve French 31638c8a9a5SSteve French atomic_inc(&tconInfoReconnectCount); 31738c8a9a5SSteve French out: 31838c8a9a5SSteve French /* 31938c8a9a5SSteve French * Check if handle based operation so we know whether we can continue 32038c8a9a5SSteve French * or not without returning to caller to reset file handle. 32138c8a9a5SSteve French */ 32238c8a9a5SSteve French /* 32338c8a9a5SSteve French * BB Is flush done by server on drop of tcp session? Should we special 32438c8a9a5SSteve French * case it and skip above? 32538c8a9a5SSteve French */ 32638c8a9a5SSteve French switch (smb2_command) { 32738c8a9a5SSteve French case SMB2_FLUSH: 32838c8a9a5SSteve French case SMB2_READ: 32938c8a9a5SSteve French case SMB2_WRITE: 33038c8a9a5SSteve French case SMB2_LOCK: 33138c8a9a5SSteve French case SMB2_QUERY_DIRECTORY: 33238c8a9a5SSteve French case SMB2_CHANGE_NOTIFY: 33338c8a9a5SSteve French case SMB2_QUERY_INFO: 33438c8a9a5SSteve French case SMB2_SET_INFO: 33538c8a9a5SSteve French rc = -EAGAIN; 33638c8a9a5SSteve French } 33738c8a9a5SSteve French failed: 33838c8a9a5SSteve French return rc; 33938c8a9a5SSteve French } 34038c8a9a5SSteve French 34138c8a9a5SSteve French static void 34238c8a9a5SSteve French fill_small_buf(__le16 smb2_command, struct cifs_tcon *tcon, 34338c8a9a5SSteve French struct TCP_Server_Info *server, 34438c8a9a5SSteve French void *buf, 34538c8a9a5SSteve French unsigned int *total_len) 34638c8a9a5SSteve French { 34738c8a9a5SSteve French struct smb2_pdu *spdu = buf; 34838c8a9a5SSteve French /* lookup word count ie StructureSize from table */ 34938c8a9a5SSteve French __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_command)]; 35038c8a9a5SSteve French 35138c8a9a5SSteve French /* 35238c8a9a5SSteve French * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of 35338c8a9a5SSteve French * largest operations (Create) 35438c8a9a5SSteve French */ 35538c8a9a5SSteve French memset(buf, 0, 256); 35638c8a9a5SSteve French 35738c8a9a5SSteve French smb2_hdr_assemble(&spdu->hdr, smb2_command, tcon, server); 35838c8a9a5SSteve French spdu->StructureSize2 = cpu_to_le16(parmsize); 35938c8a9a5SSteve French 36038c8a9a5SSteve French *total_len = parmsize + sizeof(struct smb2_hdr); 36138c8a9a5SSteve French } 36238c8a9a5SSteve French 36338c8a9a5SSteve French /* 36438c8a9a5SSteve French * Allocate and return pointer to an SMB request hdr, and set basic 36538c8a9a5SSteve French * SMB information in the SMB header. If the return code is zero, this 36638c8a9a5SSteve French * function must have filled in request_buf pointer. 36738c8a9a5SSteve French */ 36838c8a9a5SSteve French static int __smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon, 36938c8a9a5SSteve French struct TCP_Server_Info *server, 37038c8a9a5SSteve French void **request_buf, unsigned int *total_len) 37138c8a9a5SSteve French { 37238c8a9a5SSteve French /* BB eventually switch this to SMB2 specific small buf size */ 37338c8a9a5SSteve French if (smb2_command == SMB2_SET_INFO) 37438c8a9a5SSteve French *request_buf = cifs_buf_get(); 37538c8a9a5SSteve French else 37638c8a9a5SSteve French *request_buf = cifs_small_buf_get(); 37738c8a9a5SSteve French if (*request_buf == NULL) { 37838c8a9a5SSteve French /* BB should we add a retry in here if not a writepage? */ 37938c8a9a5SSteve French return -ENOMEM; 38038c8a9a5SSteve French } 38138c8a9a5SSteve French 38238c8a9a5SSteve French fill_small_buf(smb2_command, tcon, server, 38338c8a9a5SSteve French (struct smb2_hdr *)(*request_buf), 38438c8a9a5SSteve French total_len); 38538c8a9a5SSteve French 38638c8a9a5SSteve French if (tcon != NULL) { 38738c8a9a5SSteve French uint16_t com_code = le16_to_cpu(smb2_command); 38838c8a9a5SSteve French cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]); 38938c8a9a5SSteve French cifs_stats_inc(&tcon->num_smbs_sent); 39038c8a9a5SSteve French } 39138c8a9a5SSteve French 39238c8a9a5SSteve French return 0; 39338c8a9a5SSteve French } 39438c8a9a5SSteve French 39538c8a9a5SSteve French static int smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon, 39638c8a9a5SSteve French struct TCP_Server_Info *server, 39738c8a9a5SSteve French void **request_buf, unsigned int *total_len) 39838c8a9a5SSteve French { 39938c8a9a5SSteve French int rc; 40038c8a9a5SSteve French 40138c8a9a5SSteve French rc = smb2_reconnect(smb2_command, tcon, server); 40238c8a9a5SSteve French if (rc) 40338c8a9a5SSteve French return rc; 40438c8a9a5SSteve French 40538c8a9a5SSteve French return __smb2_plain_req_init(smb2_command, tcon, server, request_buf, 40638c8a9a5SSteve French total_len); 40738c8a9a5SSteve French } 40838c8a9a5SSteve French 40938c8a9a5SSteve French static int smb2_ioctl_req_init(u32 opcode, struct cifs_tcon *tcon, 41038c8a9a5SSteve French struct TCP_Server_Info *server, 41138c8a9a5SSteve French void **request_buf, unsigned int *total_len) 41238c8a9a5SSteve French { 41338c8a9a5SSteve French /* Skip reconnect only for FSCTL_VALIDATE_NEGOTIATE_INFO IOCTLs */ 41438c8a9a5SSteve French if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO) { 41538c8a9a5SSteve French return __smb2_plain_req_init(SMB2_IOCTL, tcon, server, 41638c8a9a5SSteve French request_buf, total_len); 41738c8a9a5SSteve French } 41838c8a9a5SSteve French return smb2_plain_req_init(SMB2_IOCTL, tcon, server, 41938c8a9a5SSteve French request_buf, total_len); 42038c8a9a5SSteve French } 42138c8a9a5SSteve French 42238c8a9a5SSteve French /* For explanation of negotiate contexts see MS-SMB2 section 2.2.3.1 */ 42338c8a9a5SSteve French 42438c8a9a5SSteve French static void 42538c8a9a5SSteve French build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt) 42638c8a9a5SSteve French { 42738c8a9a5SSteve French pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES; 42838c8a9a5SSteve French pneg_ctxt->DataLength = cpu_to_le16(38); 42938c8a9a5SSteve French pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1); 43038c8a9a5SSteve French pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE); 43138c8a9a5SSteve French get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE); 43238c8a9a5SSteve French pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512; 43338c8a9a5SSteve French } 43438c8a9a5SSteve French 43538c8a9a5SSteve French static void 43638c8a9a5SSteve French build_compression_ctxt(struct smb2_compression_capabilities_context *pneg_ctxt) 43738c8a9a5SSteve French { 43838c8a9a5SSteve French pneg_ctxt->ContextType = SMB2_COMPRESSION_CAPABILITIES; 43938c8a9a5SSteve French pneg_ctxt->DataLength = 44038c8a9a5SSteve French cpu_to_le16(sizeof(struct smb2_compression_capabilities_context) 44138c8a9a5SSteve French - sizeof(struct smb2_neg_context)); 44238c8a9a5SSteve French pneg_ctxt->CompressionAlgorithmCount = cpu_to_le16(3); 44338c8a9a5SSteve French pneg_ctxt->CompressionAlgorithms[0] = SMB3_COMPRESS_LZ77; 44438c8a9a5SSteve French pneg_ctxt->CompressionAlgorithms[1] = SMB3_COMPRESS_LZ77_HUFF; 44538c8a9a5SSteve French pneg_ctxt->CompressionAlgorithms[2] = SMB3_COMPRESS_LZNT1; 44638c8a9a5SSteve French } 44738c8a9a5SSteve French 44838c8a9a5SSteve French static unsigned int 44938c8a9a5SSteve French build_signing_ctxt(struct smb2_signing_capabilities *pneg_ctxt) 45038c8a9a5SSteve French { 45138c8a9a5SSteve French unsigned int ctxt_len = sizeof(struct smb2_signing_capabilities); 45238c8a9a5SSteve French unsigned short num_algs = 1; /* number of signing algorithms sent */ 45338c8a9a5SSteve French 45438c8a9a5SSteve French pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES; 45538c8a9a5SSteve French /* 45638c8a9a5SSteve French * Context Data length must be rounded to multiple of 8 for some servers 45738c8a9a5SSteve French */ 45838c8a9a5SSteve French pneg_ctxt->DataLength = cpu_to_le16(ALIGN(sizeof(struct smb2_signing_capabilities) - 45938c8a9a5SSteve French sizeof(struct smb2_neg_context) + 46038c8a9a5SSteve French (num_algs * sizeof(u16)), 8)); 46138c8a9a5SSteve French pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(num_algs); 46238c8a9a5SSteve French pneg_ctxt->SigningAlgorithms[0] = cpu_to_le16(SIGNING_ALG_AES_CMAC); 46338c8a9a5SSteve French 46438c8a9a5SSteve French ctxt_len += sizeof(__le16) * num_algs; 46538c8a9a5SSteve French ctxt_len = ALIGN(ctxt_len, 8); 46638c8a9a5SSteve French return ctxt_len; 46738c8a9a5SSteve French /* TBD add SIGNING_ALG_AES_GMAC and/or SIGNING_ALG_HMAC_SHA256 */ 46838c8a9a5SSteve French } 46938c8a9a5SSteve French 47038c8a9a5SSteve French static void 47138c8a9a5SSteve French build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt) 47238c8a9a5SSteve French { 47338c8a9a5SSteve French pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES; 47438c8a9a5SSteve French if (require_gcm_256) { 47538c8a9a5SSteve French pneg_ctxt->DataLength = cpu_to_le16(4); /* Cipher Count + 1 cipher */ 47638c8a9a5SSteve French pneg_ctxt->CipherCount = cpu_to_le16(1); 47738c8a9a5SSteve French pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES256_GCM; 47838c8a9a5SSteve French } else if (enable_gcm_256) { 47938c8a9a5SSteve French pneg_ctxt->DataLength = cpu_to_le16(8); /* Cipher Count + 3 ciphers */ 48038c8a9a5SSteve French pneg_ctxt->CipherCount = cpu_to_le16(3); 48138c8a9a5SSteve French pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM; 48238c8a9a5SSteve French pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES256_GCM; 48338c8a9a5SSteve French pneg_ctxt->Ciphers[2] = SMB2_ENCRYPTION_AES128_CCM; 48438c8a9a5SSteve French } else { 48538c8a9a5SSteve French pneg_ctxt->DataLength = cpu_to_le16(6); /* Cipher Count + 2 ciphers */ 48638c8a9a5SSteve French pneg_ctxt->CipherCount = cpu_to_le16(2); 48738c8a9a5SSteve French pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM; 48838c8a9a5SSteve French pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES128_CCM; 48938c8a9a5SSteve French } 49038c8a9a5SSteve French } 49138c8a9a5SSteve French 49238c8a9a5SSteve French static unsigned int 49338c8a9a5SSteve French build_netname_ctxt(struct smb2_netname_neg_context *pneg_ctxt, char *hostname) 49438c8a9a5SSteve French { 49538c8a9a5SSteve French struct nls_table *cp = load_nls_default(); 49638c8a9a5SSteve French 49738c8a9a5SSteve French pneg_ctxt->ContextType = SMB2_NETNAME_NEGOTIATE_CONTEXT_ID; 49838c8a9a5SSteve French 49938c8a9a5SSteve French /* copy up to max of first 100 bytes of server name to NetName field */ 50038c8a9a5SSteve French pneg_ctxt->DataLength = cpu_to_le16(2 * cifs_strtoUTF16(pneg_ctxt->NetName, hostname, 100, cp)); 50138c8a9a5SSteve French /* context size is DataLength + minimal smb2_neg_context */ 50238c8a9a5SSteve French return ALIGN(le16_to_cpu(pneg_ctxt->DataLength) + sizeof(struct smb2_neg_context), 8); 50338c8a9a5SSteve French } 50438c8a9a5SSteve French 50538c8a9a5SSteve French static void 50638c8a9a5SSteve French build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt) 50738c8a9a5SSteve French { 50838c8a9a5SSteve French pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE; 50938c8a9a5SSteve French pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN); 51038c8a9a5SSteve French /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */ 51138c8a9a5SSteve French pneg_ctxt->Name[0] = 0x93; 51238c8a9a5SSteve French pneg_ctxt->Name[1] = 0xAD; 51338c8a9a5SSteve French pneg_ctxt->Name[2] = 0x25; 51438c8a9a5SSteve French pneg_ctxt->Name[3] = 0x50; 51538c8a9a5SSteve French pneg_ctxt->Name[4] = 0x9C; 51638c8a9a5SSteve French pneg_ctxt->Name[5] = 0xB4; 51738c8a9a5SSteve French pneg_ctxt->Name[6] = 0x11; 51838c8a9a5SSteve French pneg_ctxt->Name[7] = 0xE7; 51938c8a9a5SSteve French pneg_ctxt->Name[8] = 0xB4; 52038c8a9a5SSteve French pneg_ctxt->Name[9] = 0x23; 52138c8a9a5SSteve French pneg_ctxt->Name[10] = 0x83; 52238c8a9a5SSteve French pneg_ctxt->Name[11] = 0xDE; 52338c8a9a5SSteve French pneg_ctxt->Name[12] = 0x96; 52438c8a9a5SSteve French pneg_ctxt->Name[13] = 0x8B; 52538c8a9a5SSteve French pneg_ctxt->Name[14] = 0xCD; 52638c8a9a5SSteve French pneg_ctxt->Name[15] = 0x7C; 52738c8a9a5SSteve French } 52838c8a9a5SSteve French 52938c8a9a5SSteve French static void 53038c8a9a5SSteve French assemble_neg_contexts(struct smb2_negotiate_req *req, 53138c8a9a5SSteve French struct TCP_Server_Info *server, unsigned int *total_len) 53238c8a9a5SSteve French { 53338c8a9a5SSteve French unsigned int ctxt_len, neg_context_count; 53438c8a9a5SSteve French struct TCP_Server_Info *pserver; 53538c8a9a5SSteve French char *pneg_ctxt; 53638c8a9a5SSteve French char *hostname; 53738c8a9a5SSteve French 53838c8a9a5SSteve French if (*total_len > 200) { 53938c8a9a5SSteve French /* In case length corrupted don't want to overrun smb buffer */ 54038c8a9a5SSteve French cifs_server_dbg(VFS, "Bad frame length assembling neg contexts\n"); 54138c8a9a5SSteve French return; 54238c8a9a5SSteve French } 54338c8a9a5SSteve French 54438c8a9a5SSteve French /* 54538c8a9a5SSteve French * round up total_len of fixed part of SMB3 negotiate request to 8 54638c8a9a5SSteve French * byte boundary before adding negotiate contexts 54738c8a9a5SSteve French */ 54838c8a9a5SSteve French *total_len = ALIGN(*total_len, 8); 54938c8a9a5SSteve French 55038c8a9a5SSteve French pneg_ctxt = (*total_len) + (char *)req; 55138c8a9a5SSteve French req->NegotiateContextOffset = cpu_to_le32(*total_len); 55238c8a9a5SSteve French 55338c8a9a5SSteve French build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt); 55438c8a9a5SSteve French ctxt_len = ALIGN(sizeof(struct smb2_preauth_neg_context), 8); 55538c8a9a5SSteve French *total_len += ctxt_len; 55638c8a9a5SSteve French pneg_ctxt += ctxt_len; 55738c8a9a5SSteve French 55838c8a9a5SSteve French build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt); 55938c8a9a5SSteve French ctxt_len = ALIGN(sizeof(struct smb2_encryption_neg_context), 8); 56038c8a9a5SSteve French *total_len += ctxt_len; 56138c8a9a5SSteve French pneg_ctxt += ctxt_len; 56238c8a9a5SSteve French 56338c8a9a5SSteve French /* 56438c8a9a5SSteve French * secondary channels don't have the hostname field populated 56538c8a9a5SSteve French * use the hostname field in the primary channel instead 56638c8a9a5SSteve French */ 567*b3773b19SSteve French pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 56838c8a9a5SSteve French cifs_server_lock(pserver); 56938c8a9a5SSteve French hostname = pserver->hostname; 57038c8a9a5SSteve French if (hostname && (hostname[0] != 0)) { 57138c8a9a5SSteve French ctxt_len = build_netname_ctxt((struct smb2_netname_neg_context *)pneg_ctxt, 57238c8a9a5SSteve French hostname); 57338c8a9a5SSteve French *total_len += ctxt_len; 57438c8a9a5SSteve French pneg_ctxt += ctxt_len; 57538c8a9a5SSteve French neg_context_count = 3; 57638c8a9a5SSteve French } else 57738c8a9a5SSteve French neg_context_count = 2; 57838c8a9a5SSteve French cifs_server_unlock(pserver); 57938c8a9a5SSteve French 58038c8a9a5SSteve French build_posix_ctxt((struct smb2_posix_neg_context *)pneg_ctxt); 58138c8a9a5SSteve French *total_len += sizeof(struct smb2_posix_neg_context); 58238c8a9a5SSteve French pneg_ctxt += sizeof(struct smb2_posix_neg_context); 58338c8a9a5SSteve French neg_context_count++; 58438c8a9a5SSteve French 58538c8a9a5SSteve French if (server->compress_algorithm) { 58638c8a9a5SSteve French build_compression_ctxt((struct smb2_compression_capabilities_context *) 58738c8a9a5SSteve French pneg_ctxt); 58838c8a9a5SSteve French ctxt_len = ALIGN(sizeof(struct smb2_compression_capabilities_context), 8); 58938c8a9a5SSteve French *total_len += ctxt_len; 59038c8a9a5SSteve French pneg_ctxt += ctxt_len; 59138c8a9a5SSteve French neg_context_count++; 59238c8a9a5SSteve French } 59338c8a9a5SSteve French 59438c8a9a5SSteve French if (enable_negotiate_signing) { 59538c8a9a5SSteve French ctxt_len = build_signing_ctxt((struct smb2_signing_capabilities *) 59638c8a9a5SSteve French pneg_ctxt); 59738c8a9a5SSteve French *total_len += ctxt_len; 59838c8a9a5SSteve French pneg_ctxt += ctxt_len; 59938c8a9a5SSteve French neg_context_count++; 60038c8a9a5SSteve French } 60138c8a9a5SSteve French 60238c8a9a5SSteve French /* check for and add transport_capabilities and signing capabilities */ 60338c8a9a5SSteve French req->NegotiateContextCount = cpu_to_le16(neg_context_count); 60438c8a9a5SSteve French 60538c8a9a5SSteve French } 60638c8a9a5SSteve French 60738c8a9a5SSteve French /* If invalid preauth context warn but use what we requested, SHA-512 */ 60838c8a9a5SSteve French static void decode_preauth_context(struct smb2_preauth_neg_context *ctxt) 60938c8a9a5SSteve French { 61038c8a9a5SSteve French unsigned int len = le16_to_cpu(ctxt->DataLength); 61138c8a9a5SSteve French 61238c8a9a5SSteve French /* 61338c8a9a5SSteve French * Caller checked that DataLength remains within SMB boundary. We still 61438c8a9a5SSteve French * need to confirm that one HashAlgorithms member is accounted for. 61538c8a9a5SSteve French */ 61638c8a9a5SSteve French if (len < MIN_PREAUTH_CTXT_DATA_LEN) { 61738c8a9a5SSteve French pr_warn_once("server sent bad preauth context\n"); 61838c8a9a5SSteve French return; 61938c8a9a5SSteve French } else if (len < MIN_PREAUTH_CTXT_DATA_LEN + le16_to_cpu(ctxt->SaltLength)) { 62038c8a9a5SSteve French pr_warn_once("server sent invalid SaltLength\n"); 62138c8a9a5SSteve French return; 62238c8a9a5SSteve French } 62338c8a9a5SSteve French if (le16_to_cpu(ctxt->HashAlgorithmCount) != 1) 62438c8a9a5SSteve French pr_warn_once("Invalid SMB3 hash algorithm count\n"); 62538c8a9a5SSteve French if (ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512) 62638c8a9a5SSteve French pr_warn_once("unknown SMB3 hash algorithm\n"); 62738c8a9a5SSteve French } 62838c8a9a5SSteve French 62938c8a9a5SSteve French static void decode_compress_ctx(struct TCP_Server_Info *server, 63038c8a9a5SSteve French struct smb2_compression_capabilities_context *ctxt) 63138c8a9a5SSteve French { 63238c8a9a5SSteve French unsigned int len = le16_to_cpu(ctxt->DataLength); 63338c8a9a5SSteve French 63438c8a9a5SSteve French /* 63538c8a9a5SSteve French * Caller checked that DataLength remains within SMB boundary. We still 63638c8a9a5SSteve French * need to confirm that one CompressionAlgorithms member is accounted 63738c8a9a5SSteve French * for. 63838c8a9a5SSteve French */ 63938c8a9a5SSteve French if (len < 10) { 64038c8a9a5SSteve French pr_warn_once("server sent bad compression cntxt\n"); 64138c8a9a5SSteve French return; 64238c8a9a5SSteve French } 64338c8a9a5SSteve French if (le16_to_cpu(ctxt->CompressionAlgorithmCount) != 1) { 64438c8a9a5SSteve French pr_warn_once("Invalid SMB3 compress algorithm count\n"); 64538c8a9a5SSteve French return; 64638c8a9a5SSteve French } 64738c8a9a5SSteve French if (le16_to_cpu(ctxt->CompressionAlgorithms[0]) > 3) { 64838c8a9a5SSteve French pr_warn_once("unknown compression algorithm\n"); 64938c8a9a5SSteve French return; 65038c8a9a5SSteve French } 65138c8a9a5SSteve French server->compress_algorithm = ctxt->CompressionAlgorithms[0]; 65238c8a9a5SSteve French } 65338c8a9a5SSteve French 65438c8a9a5SSteve French static int decode_encrypt_ctx(struct TCP_Server_Info *server, 65538c8a9a5SSteve French struct smb2_encryption_neg_context *ctxt) 65638c8a9a5SSteve French { 65738c8a9a5SSteve French unsigned int len = le16_to_cpu(ctxt->DataLength); 65838c8a9a5SSteve French 65938c8a9a5SSteve French cifs_dbg(FYI, "decode SMB3.11 encryption neg context of len %d\n", len); 66038c8a9a5SSteve French /* 66138c8a9a5SSteve French * Caller checked that DataLength remains within SMB boundary. We still 66238c8a9a5SSteve French * need to confirm that one Cipher flexible array member is accounted 66338c8a9a5SSteve French * for. 66438c8a9a5SSteve French */ 66538c8a9a5SSteve French if (len < MIN_ENCRYPT_CTXT_DATA_LEN) { 66638c8a9a5SSteve French pr_warn_once("server sent bad crypto ctxt len\n"); 66738c8a9a5SSteve French return -EINVAL; 66838c8a9a5SSteve French } 66938c8a9a5SSteve French 67038c8a9a5SSteve French if (le16_to_cpu(ctxt->CipherCount) != 1) { 67138c8a9a5SSteve French pr_warn_once("Invalid SMB3.11 cipher count\n"); 67238c8a9a5SSteve French return -EINVAL; 67338c8a9a5SSteve French } 67438c8a9a5SSteve French cifs_dbg(FYI, "SMB311 cipher type:%d\n", le16_to_cpu(ctxt->Ciphers[0])); 67538c8a9a5SSteve French if (require_gcm_256) { 67638c8a9a5SSteve French if (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES256_GCM) { 67738c8a9a5SSteve French cifs_dbg(VFS, "Server does not support requested encryption type (AES256 GCM)\n"); 67838c8a9a5SSteve French return -EOPNOTSUPP; 67938c8a9a5SSteve French } 68038c8a9a5SSteve French } else if (ctxt->Ciphers[0] == 0) { 68138c8a9a5SSteve French /* 68238c8a9a5SSteve French * e.g. if server only supported AES256_CCM (very unlikely) 68338c8a9a5SSteve French * or server supported no encryption types or had all disabled. 68438c8a9a5SSteve French * Since GLOBAL_CAP_ENCRYPTION will be not set, in the case 68538c8a9a5SSteve French * in which mount requested encryption ("seal") checks later 68638c8a9a5SSteve French * on during tree connection will return proper rc, but if 68738c8a9a5SSteve French * seal not requested by client, since server is allowed to 68838c8a9a5SSteve French * return 0 to indicate no supported cipher, we can't fail here 68938c8a9a5SSteve French */ 69038c8a9a5SSteve French server->cipher_type = 0; 69138c8a9a5SSteve French server->capabilities &= ~SMB2_GLOBAL_CAP_ENCRYPTION; 69238c8a9a5SSteve French pr_warn_once("Server does not support requested encryption types\n"); 69338c8a9a5SSteve French return 0; 69438c8a9a5SSteve French } else if ((ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_CCM) && 69538c8a9a5SSteve French (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_GCM) && 69638c8a9a5SSteve French (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES256_GCM)) { 69738c8a9a5SSteve French /* server returned a cipher we didn't ask for */ 69838c8a9a5SSteve French pr_warn_once("Invalid SMB3.11 cipher returned\n"); 69938c8a9a5SSteve French return -EINVAL; 70038c8a9a5SSteve French } 70138c8a9a5SSteve French server->cipher_type = ctxt->Ciphers[0]; 70238c8a9a5SSteve French server->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION; 70338c8a9a5SSteve French return 0; 70438c8a9a5SSteve French } 70538c8a9a5SSteve French 70638c8a9a5SSteve French static void decode_signing_ctx(struct TCP_Server_Info *server, 70738c8a9a5SSteve French struct smb2_signing_capabilities *pctxt) 70838c8a9a5SSteve French { 70938c8a9a5SSteve French unsigned int len = le16_to_cpu(pctxt->DataLength); 71038c8a9a5SSteve French 71138c8a9a5SSteve French /* 71238c8a9a5SSteve French * Caller checked that DataLength remains within SMB boundary. We still 71338c8a9a5SSteve French * need to confirm that one SigningAlgorithms flexible array member is 71438c8a9a5SSteve French * accounted for. 71538c8a9a5SSteve French */ 71638c8a9a5SSteve French if ((len < 4) || (len > 16)) { 71738c8a9a5SSteve French pr_warn_once("server sent bad signing negcontext\n"); 71838c8a9a5SSteve French return; 71938c8a9a5SSteve French } 72038c8a9a5SSteve French if (le16_to_cpu(pctxt->SigningAlgorithmCount) != 1) { 72138c8a9a5SSteve French pr_warn_once("Invalid signing algorithm count\n"); 72238c8a9a5SSteve French return; 72338c8a9a5SSteve French } 72438c8a9a5SSteve French if (le16_to_cpu(pctxt->SigningAlgorithms[0]) > 2) { 72538c8a9a5SSteve French pr_warn_once("unknown signing algorithm\n"); 72638c8a9a5SSteve French return; 72738c8a9a5SSteve French } 72838c8a9a5SSteve French 72938c8a9a5SSteve French server->signing_negotiated = true; 73038c8a9a5SSteve French server->signing_algorithm = le16_to_cpu(pctxt->SigningAlgorithms[0]); 73138c8a9a5SSteve French cifs_dbg(FYI, "signing algorithm %d chosen\n", 73238c8a9a5SSteve French server->signing_algorithm); 73338c8a9a5SSteve French } 73438c8a9a5SSteve French 73538c8a9a5SSteve French 73638c8a9a5SSteve French static int smb311_decode_neg_context(struct smb2_negotiate_rsp *rsp, 73738c8a9a5SSteve French struct TCP_Server_Info *server, 73838c8a9a5SSteve French unsigned int len_of_smb) 73938c8a9a5SSteve French { 74038c8a9a5SSteve French struct smb2_neg_context *pctx; 74138c8a9a5SSteve French unsigned int offset = le32_to_cpu(rsp->NegotiateContextOffset); 74238c8a9a5SSteve French unsigned int ctxt_cnt = le16_to_cpu(rsp->NegotiateContextCount); 74338c8a9a5SSteve French unsigned int len_of_ctxts, i; 74438c8a9a5SSteve French int rc = 0; 74538c8a9a5SSteve French 74638c8a9a5SSteve French cifs_dbg(FYI, "decoding %d negotiate contexts\n", ctxt_cnt); 74738c8a9a5SSteve French if (len_of_smb <= offset) { 74838c8a9a5SSteve French cifs_server_dbg(VFS, "Invalid response: negotiate context offset\n"); 74938c8a9a5SSteve French return -EINVAL; 75038c8a9a5SSteve French } 75138c8a9a5SSteve French 75238c8a9a5SSteve French len_of_ctxts = len_of_smb - offset; 75338c8a9a5SSteve French 75438c8a9a5SSteve French for (i = 0; i < ctxt_cnt; i++) { 75538c8a9a5SSteve French int clen; 75638c8a9a5SSteve French /* check that offset is not beyond end of SMB */ 75738c8a9a5SSteve French if (len_of_ctxts < sizeof(struct smb2_neg_context)) 75838c8a9a5SSteve French break; 75938c8a9a5SSteve French 76038c8a9a5SSteve French pctx = (struct smb2_neg_context *)(offset + (char *)rsp); 76138c8a9a5SSteve French clen = sizeof(struct smb2_neg_context) 76238c8a9a5SSteve French + le16_to_cpu(pctx->DataLength); 76338c8a9a5SSteve French /* 76438c8a9a5SSteve French * 2.2.4 SMB2 NEGOTIATE Response 76538c8a9a5SSteve French * Subsequent negotiate contexts MUST appear at the first 8-byte 76638c8a9a5SSteve French * aligned offset following the previous negotiate context. 76738c8a9a5SSteve French */ 76838c8a9a5SSteve French if (i + 1 != ctxt_cnt) 76938c8a9a5SSteve French clen = ALIGN(clen, 8); 77038c8a9a5SSteve French if (clen > len_of_ctxts) 77138c8a9a5SSteve French break; 77238c8a9a5SSteve French 77338c8a9a5SSteve French if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) 77438c8a9a5SSteve French decode_preauth_context( 77538c8a9a5SSteve French (struct smb2_preauth_neg_context *)pctx); 77638c8a9a5SSteve French else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) 77738c8a9a5SSteve French rc = decode_encrypt_ctx(server, 77838c8a9a5SSteve French (struct smb2_encryption_neg_context *)pctx); 77938c8a9a5SSteve French else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) 78038c8a9a5SSteve French decode_compress_ctx(server, 78138c8a9a5SSteve French (struct smb2_compression_capabilities_context *)pctx); 78238c8a9a5SSteve French else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) 78338c8a9a5SSteve French server->posix_ext_supported = true; 78438c8a9a5SSteve French else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) 78538c8a9a5SSteve French decode_signing_ctx(server, 78638c8a9a5SSteve French (struct smb2_signing_capabilities *)pctx); 78738c8a9a5SSteve French else 78838c8a9a5SSteve French cifs_server_dbg(VFS, "unknown negcontext of type %d ignored\n", 78938c8a9a5SSteve French le16_to_cpu(pctx->ContextType)); 79038c8a9a5SSteve French if (rc) 79138c8a9a5SSteve French break; 79238c8a9a5SSteve French 79338c8a9a5SSteve French offset += clen; 79438c8a9a5SSteve French len_of_ctxts -= clen; 79538c8a9a5SSteve French } 79638c8a9a5SSteve French return rc; 79738c8a9a5SSteve French } 79838c8a9a5SSteve French 79938c8a9a5SSteve French static struct create_posix * 80038c8a9a5SSteve French create_posix_buf(umode_t mode) 80138c8a9a5SSteve French { 80238c8a9a5SSteve French struct create_posix *buf; 80338c8a9a5SSteve French 80438c8a9a5SSteve French buf = kzalloc(sizeof(struct create_posix), 80538c8a9a5SSteve French GFP_KERNEL); 80638c8a9a5SSteve French if (!buf) 80738c8a9a5SSteve French return NULL; 80838c8a9a5SSteve French 80938c8a9a5SSteve French buf->ccontext.DataOffset = 81038c8a9a5SSteve French cpu_to_le16(offsetof(struct create_posix, Mode)); 81138c8a9a5SSteve French buf->ccontext.DataLength = cpu_to_le32(4); 81238c8a9a5SSteve French buf->ccontext.NameOffset = 81338c8a9a5SSteve French cpu_to_le16(offsetof(struct create_posix, Name)); 81438c8a9a5SSteve French buf->ccontext.NameLength = cpu_to_le16(16); 81538c8a9a5SSteve French 81638c8a9a5SSteve French /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */ 81738c8a9a5SSteve French buf->Name[0] = 0x93; 81838c8a9a5SSteve French buf->Name[1] = 0xAD; 81938c8a9a5SSteve French buf->Name[2] = 0x25; 82038c8a9a5SSteve French buf->Name[3] = 0x50; 82138c8a9a5SSteve French buf->Name[4] = 0x9C; 82238c8a9a5SSteve French buf->Name[5] = 0xB4; 82338c8a9a5SSteve French buf->Name[6] = 0x11; 82438c8a9a5SSteve French buf->Name[7] = 0xE7; 82538c8a9a5SSteve French buf->Name[8] = 0xB4; 82638c8a9a5SSteve French buf->Name[9] = 0x23; 82738c8a9a5SSteve French buf->Name[10] = 0x83; 82838c8a9a5SSteve French buf->Name[11] = 0xDE; 82938c8a9a5SSteve French buf->Name[12] = 0x96; 83038c8a9a5SSteve French buf->Name[13] = 0x8B; 83138c8a9a5SSteve French buf->Name[14] = 0xCD; 83238c8a9a5SSteve French buf->Name[15] = 0x7C; 83338c8a9a5SSteve French buf->Mode = cpu_to_le32(mode); 83438c8a9a5SSteve French cifs_dbg(FYI, "mode on posix create 0%o\n", mode); 83538c8a9a5SSteve French return buf; 83638c8a9a5SSteve French } 83738c8a9a5SSteve French 83838c8a9a5SSteve French static int 83938c8a9a5SSteve French add_posix_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode) 84038c8a9a5SSteve French { 84138c8a9a5SSteve French unsigned int num = *num_iovec; 84238c8a9a5SSteve French 84338c8a9a5SSteve French iov[num].iov_base = create_posix_buf(mode); 84438c8a9a5SSteve French if (mode == ACL_NO_MODE) 84538c8a9a5SSteve French cifs_dbg(FYI, "Invalid mode\n"); 84638c8a9a5SSteve French if (iov[num].iov_base == NULL) 84738c8a9a5SSteve French return -ENOMEM; 84838c8a9a5SSteve French iov[num].iov_len = sizeof(struct create_posix); 84938c8a9a5SSteve French *num_iovec = num + 1; 85038c8a9a5SSteve French return 0; 85138c8a9a5SSteve French } 85238c8a9a5SSteve French 85338c8a9a5SSteve French 85438c8a9a5SSteve French /* 85538c8a9a5SSteve French * 85638c8a9a5SSteve French * SMB2 Worker functions follow: 85738c8a9a5SSteve French * 85838c8a9a5SSteve French * The general structure of the worker functions is: 85938c8a9a5SSteve French * 1) Call smb2_init (assembles SMB2 header) 86038c8a9a5SSteve French * 2) Initialize SMB2 command specific fields in fixed length area of SMB 86138c8a9a5SSteve French * 3) Call smb_sendrcv2 (sends request on socket and waits for response) 86238c8a9a5SSteve French * 4) Decode SMB2 command specific fields in the fixed length area 86338c8a9a5SSteve French * 5) Decode variable length data area (if any for this SMB2 command type) 86438c8a9a5SSteve French * 6) Call free smb buffer 86538c8a9a5SSteve French * 7) return 86638c8a9a5SSteve French * 86738c8a9a5SSteve French */ 86838c8a9a5SSteve French 86938c8a9a5SSteve French int 87038c8a9a5SSteve French SMB2_negotiate(const unsigned int xid, 87138c8a9a5SSteve French struct cifs_ses *ses, 87238c8a9a5SSteve French struct TCP_Server_Info *server) 87338c8a9a5SSteve French { 87438c8a9a5SSteve French struct smb_rqst rqst; 87538c8a9a5SSteve French struct smb2_negotiate_req *req; 87638c8a9a5SSteve French struct smb2_negotiate_rsp *rsp; 87738c8a9a5SSteve French struct kvec iov[1]; 87838c8a9a5SSteve French struct kvec rsp_iov; 87938c8a9a5SSteve French int rc; 88038c8a9a5SSteve French int resp_buftype; 88138c8a9a5SSteve French int blob_offset, blob_length; 88238c8a9a5SSteve French char *security_blob; 88338c8a9a5SSteve French int flags = CIFS_NEG_OP; 88438c8a9a5SSteve French unsigned int total_len; 88538c8a9a5SSteve French 88638c8a9a5SSteve French cifs_dbg(FYI, "Negotiate protocol\n"); 88738c8a9a5SSteve French 88838c8a9a5SSteve French if (!server) { 88938c8a9a5SSteve French WARN(1, "%s: server is NULL!\n", __func__); 89038c8a9a5SSteve French return -EIO; 89138c8a9a5SSteve French } 89238c8a9a5SSteve French 89338c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_NEGOTIATE, NULL, server, 89438c8a9a5SSteve French (void **) &req, &total_len); 89538c8a9a5SSteve French if (rc) 89638c8a9a5SSteve French return rc; 89738c8a9a5SSteve French 89838c8a9a5SSteve French req->hdr.SessionId = 0; 89938c8a9a5SSteve French 90038c8a9a5SSteve French memset(server->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE); 90138c8a9a5SSteve French memset(ses->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE); 90238c8a9a5SSteve French 90338c8a9a5SSteve French if (strcmp(server->vals->version_string, 90438c8a9a5SSteve French SMB3ANY_VERSION_STRING) == 0) { 90538c8a9a5SSteve French req->Dialects[0] = cpu_to_le16(SMB30_PROT_ID); 90638c8a9a5SSteve French req->Dialects[1] = cpu_to_le16(SMB302_PROT_ID); 90738c8a9a5SSteve French req->Dialects[2] = cpu_to_le16(SMB311_PROT_ID); 90838c8a9a5SSteve French req->DialectCount = cpu_to_le16(3); 90938c8a9a5SSteve French total_len += 6; 91038c8a9a5SSteve French } else if (strcmp(server->vals->version_string, 91138c8a9a5SSteve French SMBDEFAULT_VERSION_STRING) == 0) { 91238c8a9a5SSteve French req->Dialects[0] = cpu_to_le16(SMB21_PROT_ID); 91338c8a9a5SSteve French req->Dialects[1] = cpu_to_le16(SMB30_PROT_ID); 91438c8a9a5SSteve French req->Dialects[2] = cpu_to_le16(SMB302_PROT_ID); 91538c8a9a5SSteve French req->Dialects[3] = cpu_to_le16(SMB311_PROT_ID); 91638c8a9a5SSteve French req->DialectCount = cpu_to_le16(4); 91738c8a9a5SSteve French total_len += 8; 91838c8a9a5SSteve French } else { 91938c8a9a5SSteve French /* otherwise send specific dialect */ 92038c8a9a5SSteve French req->Dialects[0] = cpu_to_le16(server->vals->protocol_id); 92138c8a9a5SSteve French req->DialectCount = cpu_to_le16(1); 92238c8a9a5SSteve French total_len += 2; 92338c8a9a5SSteve French } 92438c8a9a5SSteve French 92538c8a9a5SSteve French /* only one of SMB2 signing flags may be set in SMB2 request */ 92638c8a9a5SSteve French if (ses->sign) 92738c8a9a5SSteve French req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED); 92838c8a9a5SSteve French else if (global_secflags & CIFSSEC_MAY_SIGN) 92938c8a9a5SSteve French req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED); 93038c8a9a5SSteve French else 93138c8a9a5SSteve French req->SecurityMode = 0; 93238c8a9a5SSteve French 93338c8a9a5SSteve French req->Capabilities = cpu_to_le32(server->vals->req_capabilities); 93438c8a9a5SSteve French if (ses->chan_max > 1) 93538c8a9a5SSteve French req->Capabilities |= cpu_to_le32(SMB2_GLOBAL_CAP_MULTI_CHANNEL); 93638c8a9a5SSteve French 93738c8a9a5SSteve French /* ClientGUID must be zero for SMB2.02 dialect */ 93838c8a9a5SSteve French if (server->vals->protocol_id == SMB20_PROT_ID) 93938c8a9a5SSteve French memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE); 94038c8a9a5SSteve French else { 94138c8a9a5SSteve French memcpy(req->ClientGUID, server->client_guid, 94238c8a9a5SSteve French SMB2_CLIENT_GUID_SIZE); 94338c8a9a5SSteve French if ((server->vals->protocol_id == SMB311_PROT_ID) || 94438c8a9a5SSteve French (strcmp(server->vals->version_string, 94538c8a9a5SSteve French SMB3ANY_VERSION_STRING) == 0) || 94638c8a9a5SSteve French (strcmp(server->vals->version_string, 94738c8a9a5SSteve French SMBDEFAULT_VERSION_STRING) == 0)) 94838c8a9a5SSteve French assemble_neg_contexts(req, server, &total_len); 94938c8a9a5SSteve French } 95038c8a9a5SSteve French iov[0].iov_base = (char *)req; 95138c8a9a5SSteve French iov[0].iov_len = total_len; 95238c8a9a5SSteve French 95338c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 95438c8a9a5SSteve French rqst.rq_iov = iov; 95538c8a9a5SSteve French rqst.rq_nvec = 1; 95638c8a9a5SSteve French 95738c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 95838c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 95938c8a9a5SSteve French cifs_small_buf_release(req); 96038c8a9a5SSteve French rsp = (struct smb2_negotiate_rsp *)rsp_iov.iov_base; 96138c8a9a5SSteve French /* 96238c8a9a5SSteve French * No tcon so can't do 96338c8a9a5SSteve French * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); 96438c8a9a5SSteve French */ 96538c8a9a5SSteve French if (rc == -EOPNOTSUPP) { 96638c8a9a5SSteve 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"); 96738c8a9a5SSteve French goto neg_exit; 96838c8a9a5SSteve French } else if (rc != 0) 96938c8a9a5SSteve French goto neg_exit; 97038c8a9a5SSteve French 97138c8a9a5SSteve French rc = -EIO; 97238c8a9a5SSteve French if (strcmp(server->vals->version_string, 97338c8a9a5SSteve French SMB3ANY_VERSION_STRING) == 0) { 97438c8a9a5SSteve French if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) { 97538c8a9a5SSteve French cifs_server_dbg(VFS, 97638c8a9a5SSteve French "SMB2 dialect returned but not requested\n"); 97738c8a9a5SSteve French goto neg_exit; 97838c8a9a5SSteve French } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) { 97938c8a9a5SSteve French cifs_server_dbg(VFS, 98038c8a9a5SSteve French "SMB2.1 dialect returned but not requested\n"); 98138c8a9a5SSteve French goto neg_exit; 98238c8a9a5SSteve French } else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) { 98338c8a9a5SSteve French /* ops set to 3.0 by default for default so update */ 98438c8a9a5SSteve French server->ops = &smb311_operations; 98538c8a9a5SSteve French server->vals = &smb311_values; 98638c8a9a5SSteve French } 98738c8a9a5SSteve French } else if (strcmp(server->vals->version_string, 98838c8a9a5SSteve French SMBDEFAULT_VERSION_STRING) == 0) { 98938c8a9a5SSteve French if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) { 99038c8a9a5SSteve French cifs_server_dbg(VFS, 99138c8a9a5SSteve French "SMB2 dialect returned but not requested\n"); 99238c8a9a5SSteve French goto neg_exit; 99338c8a9a5SSteve French } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) { 99438c8a9a5SSteve French /* ops set to 3.0 by default for default so update */ 99538c8a9a5SSteve French server->ops = &smb21_operations; 99638c8a9a5SSteve French server->vals = &smb21_values; 99738c8a9a5SSteve French } else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) { 99838c8a9a5SSteve French server->ops = &smb311_operations; 99938c8a9a5SSteve French server->vals = &smb311_values; 100038c8a9a5SSteve French } 100138c8a9a5SSteve French } else if (le16_to_cpu(rsp->DialectRevision) != 100238c8a9a5SSteve French server->vals->protocol_id) { 100338c8a9a5SSteve French /* if requested single dialect ensure returned dialect matched */ 100438c8a9a5SSteve French cifs_server_dbg(VFS, "Invalid 0x%x dialect returned: not requested\n", 100538c8a9a5SSteve French le16_to_cpu(rsp->DialectRevision)); 100638c8a9a5SSteve French goto neg_exit; 100738c8a9a5SSteve French } 100838c8a9a5SSteve French 100938c8a9a5SSteve French cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode); 101038c8a9a5SSteve French 101138c8a9a5SSteve French if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) 101238c8a9a5SSteve French cifs_dbg(FYI, "negotiated smb2.0 dialect\n"); 101338c8a9a5SSteve French else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) 101438c8a9a5SSteve French cifs_dbg(FYI, "negotiated smb2.1 dialect\n"); 101538c8a9a5SSteve French else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID)) 101638c8a9a5SSteve French cifs_dbg(FYI, "negotiated smb3.0 dialect\n"); 101738c8a9a5SSteve French else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID)) 101838c8a9a5SSteve French cifs_dbg(FYI, "negotiated smb3.02 dialect\n"); 101938c8a9a5SSteve French else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) 102038c8a9a5SSteve French cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n"); 102138c8a9a5SSteve French else { 102238c8a9a5SSteve French cifs_server_dbg(VFS, "Invalid dialect returned by server 0x%x\n", 102338c8a9a5SSteve French le16_to_cpu(rsp->DialectRevision)); 102438c8a9a5SSteve French goto neg_exit; 102538c8a9a5SSteve French } 102638c8a9a5SSteve French 102738c8a9a5SSteve French rc = 0; 102838c8a9a5SSteve French server->dialect = le16_to_cpu(rsp->DialectRevision); 102938c8a9a5SSteve French 103038c8a9a5SSteve French /* 103138c8a9a5SSteve French * Keep a copy of the hash after negprot. This hash will be 103238c8a9a5SSteve French * the starting hash value for all sessions made from this 103338c8a9a5SSteve French * server. 103438c8a9a5SSteve French */ 103538c8a9a5SSteve French memcpy(server->preauth_sha_hash, ses->preauth_sha_hash, 103638c8a9a5SSteve French SMB2_PREAUTH_HASH_SIZE); 103738c8a9a5SSteve French 103838c8a9a5SSteve French /* SMB2 only has an extended negflavor */ 103938c8a9a5SSteve French server->negflavor = CIFS_NEGFLAVOR_EXTENDED; 104038c8a9a5SSteve French /* set it to the maximum buffer size value we can send with 1 credit */ 104138c8a9a5SSteve French server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize), 104238c8a9a5SSteve French SMB2_MAX_BUFFER_SIZE); 104338c8a9a5SSteve French server->max_read = le32_to_cpu(rsp->MaxReadSize); 104438c8a9a5SSteve French server->max_write = le32_to_cpu(rsp->MaxWriteSize); 104538c8a9a5SSteve French server->sec_mode = le16_to_cpu(rsp->SecurityMode); 104638c8a9a5SSteve French if ((server->sec_mode & SMB2_SEC_MODE_FLAGS_ALL) != server->sec_mode) 104738c8a9a5SSteve French cifs_dbg(FYI, "Server returned unexpected security mode 0x%x\n", 104838c8a9a5SSteve French server->sec_mode); 104938c8a9a5SSteve French server->capabilities = le32_to_cpu(rsp->Capabilities); 105038c8a9a5SSteve French /* Internal types */ 105138c8a9a5SSteve French server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES; 105238c8a9a5SSteve French 105338c8a9a5SSteve French /* 105438c8a9a5SSteve French * SMB3.0 supports only 1 cipher and doesn't have a encryption neg context 105538c8a9a5SSteve French * Set the cipher type manually. 105638c8a9a5SSteve French */ 105738c8a9a5SSteve French if (server->dialect == SMB30_PROT_ID && (server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION)) 105838c8a9a5SSteve French server->cipher_type = SMB2_ENCRYPTION_AES128_CCM; 105938c8a9a5SSteve French 106038c8a9a5SSteve French security_blob = smb2_get_data_area_len(&blob_offset, &blob_length, 106138c8a9a5SSteve French (struct smb2_hdr *)rsp); 106238c8a9a5SSteve French /* 106338c8a9a5SSteve French * See MS-SMB2 section 2.2.4: if no blob, client picks default which 106438c8a9a5SSteve French * for us will be 106538c8a9a5SSteve French * ses->sectype = RawNTLMSSP; 106638c8a9a5SSteve French * but for time being this is our only auth choice so doesn't matter. 106738c8a9a5SSteve French * We just found a server which sets blob length to zero expecting raw. 106838c8a9a5SSteve French */ 106938c8a9a5SSteve French if (blob_length == 0) { 107038c8a9a5SSteve French cifs_dbg(FYI, "missing security blob on negprot\n"); 107138c8a9a5SSteve French server->sec_ntlmssp = true; 107238c8a9a5SSteve French } 107338c8a9a5SSteve French 107438c8a9a5SSteve French rc = cifs_enable_signing(server, ses->sign); 107538c8a9a5SSteve French if (rc) 107638c8a9a5SSteve French goto neg_exit; 107738c8a9a5SSteve French if (blob_length) { 107838c8a9a5SSteve French rc = decode_negTokenInit(security_blob, blob_length, server); 107938c8a9a5SSteve French if (rc == 1) 108038c8a9a5SSteve French rc = 0; 108138c8a9a5SSteve French else if (rc == 0) 108238c8a9a5SSteve French rc = -EIO; 108338c8a9a5SSteve French } 108438c8a9a5SSteve French 108538c8a9a5SSteve French if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) { 108638c8a9a5SSteve French if (rsp->NegotiateContextCount) 108738c8a9a5SSteve French rc = smb311_decode_neg_context(rsp, server, 108838c8a9a5SSteve French rsp_iov.iov_len); 108938c8a9a5SSteve French else 109038c8a9a5SSteve French cifs_server_dbg(VFS, "Missing expected negotiate contexts\n"); 109138c8a9a5SSteve French } 109238c8a9a5SSteve French neg_exit: 109338c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp); 109438c8a9a5SSteve French return rc; 109538c8a9a5SSteve French } 109638c8a9a5SSteve French 109738c8a9a5SSteve French int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon) 109838c8a9a5SSteve French { 109938c8a9a5SSteve French int rc; 110038c8a9a5SSteve French struct validate_negotiate_info_req *pneg_inbuf; 110138c8a9a5SSteve French struct validate_negotiate_info_rsp *pneg_rsp = NULL; 110238c8a9a5SSteve French u32 rsplen; 110338c8a9a5SSteve French u32 inbuflen; /* max of 4 dialects */ 110438c8a9a5SSteve French struct TCP_Server_Info *server = tcon->ses->server; 110538c8a9a5SSteve French 110638c8a9a5SSteve French cifs_dbg(FYI, "validate negotiate\n"); 110738c8a9a5SSteve French 110838c8a9a5SSteve French /* In SMB3.11 preauth integrity supersedes validate negotiate */ 110938c8a9a5SSteve French if (server->dialect == SMB311_PROT_ID) 111038c8a9a5SSteve French return 0; 111138c8a9a5SSteve French 111238c8a9a5SSteve French /* 111338c8a9a5SSteve French * validation ioctl must be signed, so no point sending this if we 111438c8a9a5SSteve French * can not sign it (ie are not known user). Even if signing is not 111538c8a9a5SSteve French * required (enabled but not negotiated), in those cases we selectively 111638c8a9a5SSteve French * sign just this, the first and only signed request on a connection. 111738c8a9a5SSteve French * Having validation of negotiate info helps reduce attack vectors. 111838c8a9a5SSteve French */ 111938c8a9a5SSteve French if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) 112038c8a9a5SSteve French return 0; /* validation requires signing */ 112138c8a9a5SSteve French 112238c8a9a5SSteve French if (tcon->ses->user_name == NULL) { 112338c8a9a5SSteve French cifs_dbg(FYI, "Can't validate negotiate: null user mount\n"); 112438c8a9a5SSteve French return 0; /* validation requires signing */ 112538c8a9a5SSteve French } 112638c8a9a5SSteve French 112738c8a9a5SSteve French if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_NULL) 112838c8a9a5SSteve French cifs_tcon_dbg(VFS, "Unexpected null user (anonymous) auth flag sent by server\n"); 112938c8a9a5SSteve French 113038c8a9a5SSteve French pneg_inbuf = kmalloc(sizeof(*pneg_inbuf), GFP_NOFS); 113138c8a9a5SSteve French if (!pneg_inbuf) 113238c8a9a5SSteve French return -ENOMEM; 113338c8a9a5SSteve French 113438c8a9a5SSteve French pneg_inbuf->Capabilities = 113538c8a9a5SSteve French cpu_to_le32(server->vals->req_capabilities); 113638c8a9a5SSteve French if (tcon->ses->chan_max > 1) 113738c8a9a5SSteve French pneg_inbuf->Capabilities |= cpu_to_le32(SMB2_GLOBAL_CAP_MULTI_CHANNEL); 113838c8a9a5SSteve French 113938c8a9a5SSteve French memcpy(pneg_inbuf->Guid, server->client_guid, 114038c8a9a5SSteve French SMB2_CLIENT_GUID_SIZE); 114138c8a9a5SSteve French 114238c8a9a5SSteve French if (tcon->ses->sign) 114338c8a9a5SSteve French pneg_inbuf->SecurityMode = 114438c8a9a5SSteve French cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED); 114538c8a9a5SSteve French else if (global_secflags & CIFSSEC_MAY_SIGN) 114638c8a9a5SSteve French pneg_inbuf->SecurityMode = 114738c8a9a5SSteve French cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED); 114838c8a9a5SSteve French else 114938c8a9a5SSteve French pneg_inbuf->SecurityMode = 0; 115038c8a9a5SSteve French 115138c8a9a5SSteve French 115238c8a9a5SSteve French if (strcmp(server->vals->version_string, 115338c8a9a5SSteve French SMB3ANY_VERSION_STRING) == 0) { 115438c8a9a5SSteve French pneg_inbuf->Dialects[0] = cpu_to_le16(SMB30_PROT_ID); 115538c8a9a5SSteve French pneg_inbuf->Dialects[1] = cpu_to_le16(SMB302_PROT_ID); 115638c8a9a5SSteve French pneg_inbuf->Dialects[2] = cpu_to_le16(SMB311_PROT_ID); 115738c8a9a5SSteve French pneg_inbuf->DialectCount = cpu_to_le16(3); 115838c8a9a5SSteve French /* SMB 2.1 not included so subtract one dialect from len */ 115938c8a9a5SSteve French inbuflen = sizeof(*pneg_inbuf) - 116038c8a9a5SSteve French (sizeof(pneg_inbuf->Dialects[0])); 116138c8a9a5SSteve French } else if (strcmp(server->vals->version_string, 116238c8a9a5SSteve French SMBDEFAULT_VERSION_STRING) == 0) { 116338c8a9a5SSteve French pneg_inbuf->Dialects[0] = cpu_to_le16(SMB21_PROT_ID); 116438c8a9a5SSteve French pneg_inbuf->Dialects[1] = cpu_to_le16(SMB30_PROT_ID); 116538c8a9a5SSteve French pneg_inbuf->Dialects[2] = cpu_to_le16(SMB302_PROT_ID); 116638c8a9a5SSteve French pneg_inbuf->Dialects[3] = cpu_to_le16(SMB311_PROT_ID); 116738c8a9a5SSteve French pneg_inbuf->DialectCount = cpu_to_le16(4); 116838c8a9a5SSteve French /* structure is big enough for 4 dialects */ 116938c8a9a5SSteve French inbuflen = sizeof(*pneg_inbuf); 117038c8a9a5SSteve French } else { 117138c8a9a5SSteve French /* otherwise specific dialect was requested */ 117238c8a9a5SSteve French pneg_inbuf->Dialects[0] = 117338c8a9a5SSteve French cpu_to_le16(server->vals->protocol_id); 117438c8a9a5SSteve French pneg_inbuf->DialectCount = cpu_to_le16(1); 117538c8a9a5SSteve French /* structure is big enough for 4 dialects, sending only 1 */ 117638c8a9a5SSteve French inbuflen = sizeof(*pneg_inbuf) - 117738c8a9a5SSteve French sizeof(pneg_inbuf->Dialects[0]) * 3; 117838c8a9a5SSteve French } 117938c8a9a5SSteve French 118038c8a9a5SSteve French rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, 118138c8a9a5SSteve French FSCTL_VALIDATE_NEGOTIATE_INFO, 118238c8a9a5SSteve French (char *)pneg_inbuf, inbuflen, CIFSMaxBufSize, 118338c8a9a5SSteve French (char **)&pneg_rsp, &rsplen); 118438c8a9a5SSteve French if (rc == -EOPNOTSUPP) { 118538c8a9a5SSteve French /* 118638c8a9a5SSteve French * Old Windows versions or Netapp SMB server can return 118738c8a9a5SSteve French * not supported error. Client should accept it. 118838c8a9a5SSteve French */ 118938c8a9a5SSteve French cifs_tcon_dbg(VFS, "Server does not support validate negotiate\n"); 119038c8a9a5SSteve French rc = 0; 119138c8a9a5SSteve French goto out_free_inbuf; 119238c8a9a5SSteve French } else if (rc != 0) { 119338c8a9a5SSteve French cifs_tcon_dbg(VFS, "validate protocol negotiate failed: %d\n", 119438c8a9a5SSteve French rc); 119538c8a9a5SSteve French rc = -EIO; 119638c8a9a5SSteve French goto out_free_inbuf; 119738c8a9a5SSteve French } 119838c8a9a5SSteve French 119938c8a9a5SSteve French rc = -EIO; 120038c8a9a5SSteve French if (rsplen != sizeof(*pneg_rsp)) { 120138c8a9a5SSteve French cifs_tcon_dbg(VFS, "Invalid protocol negotiate response size: %d\n", 120238c8a9a5SSteve French rsplen); 120338c8a9a5SSteve French 120438c8a9a5SSteve French /* relax check since Mac returns max bufsize allowed on ioctl */ 120538c8a9a5SSteve French if (rsplen > CIFSMaxBufSize || rsplen < sizeof(*pneg_rsp)) 120638c8a9a5SSteve French goto out_free_rsp; 120738c8a9a5SSteve French } 120838c8a9a5SSteve French 120938c8a9a5SSteve French /* check validate negotiate info response matches what we got earlier */ 121038c8a9a5SSteve French if (pneg_rsp->Dialect != cpu_to_le16(server->dialect)) 121138c8a9a5SSteve French goto vneg_out; 121238c8a9a5SSteve French 121338c8a9a5SSteve French if (pneg_rsp->SecurityMode != cpu_to_le16(server->sec_mode)) 121438c8a9a5SSteve French goto vneg_out; 121538c8a9a5SSteve French 121638c8a9a5SSteve French /* do not validate server guid because not saved at negprot time yet */ 121738c8a9a5SSteve French 121838c8a9a5SSteve French if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND | 121938c8a9a5SSteve French SMB2_LARGE_FILES) != server->capabilities) 122038c8a9a5SSteve French goto vneg_out; 122138c8a9a5SSteve French 122238c8a9a5SSteve French /* validate negotiate successful */ 122338c8a9a5SSteve French rc = 0; 122438c8a9a5SSteve French cifs_dbg(FYI, "validate negotiate info successful\n"); 122538c8a9a5SSteve French goto out_free_rsp; 122638c8a9a5SSteve French 122738c8a9a5SSteve French vneg_out: 122838c8a9a5SSteve French cifs_tcon_dbg(VFS, "protocol revalidation - security settings mismatch\n"); 122938c8a9a5SSteve French out_free_rsp: 123038c8a9a5SSteve French kfree(pneg_rsp); 123138c8a9a5SSteve French out_free_inbuf: 123238c8a9a5SSteve French kfree(pneg_inbuf); 123338c8a9a5SSteve French return rc; 123438c8a9a5SSteve French } 123538c8a9a5SSteve French 123638c8a9a5SSteve French enum securityEnum 123738c8a9a5SSteve French smb2_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested) 123838c8a9a5SSteve French { 123938c8a9a5SSteve French switch (requested) { 124038c8a9a5SSteve French case Kerberos: 124138c8a9a5SSteve French case RawNTLMSSP: 124238c8a9a5SSteve French return requested; 124338c8a9a5SSteve French case NTLMv2: 124438c8a9a5SSteve French return RawNTLMSSP; 124538c8a9a5SSteve French case Unspecified: 124638c8a9a5SSteve French if (server->sec_ntlmssp && 124738c8a9a5SSteve French (global_secflags & CIFSSEC_MAY_NTLMSSP)) 124838c8a9a5SSteve French return RawNTLMSSP; 124938c8a9a5SSteve French if ((server->sec_kerberos || server->sec_mskerberos) && 125038c8a9a5SSteve French (global_secflags & CIFSSEC_MAY_KRB5)) 125138c8a9a5SSteve French return Kerberos; 125238c8a9a5SSteve French fallthrough; 125338c8a9a5SSteve French default: 125438c8a9a5SSteve French return Unspecified; 125538c8a9a5SSteve French } 125638c8a9a5SSteve French } 125738c8a9a5SSteve French 125838c8a9a5SSteve French struct SMB2_sess_data { 125938c8a9a5SSteve French unsigned int xid; 126038c8a9a5SSteve French struct cifs_ses *ses; 126138c8a9a5SSteve French struct TCP_Server_Info *server; 126238c8a9a5SSteve French struct nls_table *nls_cp; 126338c8a9a5SSteve French void (*func)(struct SMB2_sess_data *); 126438c8a9a5SSteve French int result; 126538c8a9a5SSteve French u64 previous_session; 126638c8a9a5SSteve French 126738c8a9a5SSteve French /* we will send the SMB in three pieces: 126838c8a9a5SSteve French * a fixed length beginning part, an optional 126938c8a9a5SSteve French * SPNEGO blob (which can be zero length), and a 127038c8a9a5SSteve French * last part which will include the strings 127138c8a9a5SSteve French * and rest of bcc area. This allows us to avoid 127238c8a9a5SSteve French * a large buffer 17K allocation 127338c8a9a5SSteve French */ 127438c8a9a5SSteve French int buf0_type; 127538c8a9a5SSteve French struct kvec iov[2]; 127638c8a9a5SSteve French }; 127738c8a9a5SSteve French 127838c8a9a5SSteve French static int 127938c8a9a5SSteve French SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data) 128038c8a9a5SSteve French { 128138c8a9a5SSteve French int rc; 128238c8a9a5SSteve French struct cifs_ses *ses = sess_data->ses; 128338c8a9a5SSteve French struct TCP_Server_Info *server = sess_data->server; 128438c8a9a5SSteve French struct smb2_sess_setup_req *req; 128538c8a9a5SSteve French unsigned int total_len; 128638c8a9a5SSteve French bool is_binding = false; 128738c8a9a5SSteve French 128838c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_SESSION_SETUP, NULL, server, 128938c8a9a5SSteve French (void **) &req, 129038c8a9a5SSteve French &total_len); 129138c8a9a5SSteve French if (rc) 129238c8a9a5SSteve French return rc; 129338c8a9a5SSteve French 129438c8a9a5SSteve French spin_lock(&ses->ses_lock); 129538c8a9a5SSteve French is_binding = (ses->ses_status == SES_GOOD); 129638c8a9a5SSteve French spin_unlock(&ses->ses_lock); 129738c8a9a5SSteve French 129838c8a9a5SSteve French if (is_binding) { 129938c8a9a5SSteve French req->hdr.SessionId = cpu_to_le64(ses->Suid); 130038c8a9a5SSteve French req->hdr.Flags |= SMB2_FLAGS_SIGNED; 130138c8a9a5SSteve French req->PreviousSessionId = 0; 130238c8a9a5SSteve French req->Flags = SMB2_SESSION_REQ_FLAG_BINDING; 130338c8a9a5SSteve French cifs_dbg(FYI, "Binding to sess id: %llx\n", ses->Suid); 130438c8a9a5SSteve French } else { 130538c8a9a5SSteve French /* First session, not a reauthenticate */ 130638c8a9a5SSteve French req->hdr.SessionId = 0; 130738c8a9a5SSteve French /* 130838c8a9a5SSteve French * if reconnect, we need to send previous sess id 130938c8a9a5SSteve French * otherwise it is 0 131038c8a9a5SSteve French */ 131138c8a9a5SSteve French req->PreviousSessionId = cpu_to_le64(sess_data->previous_session); 131238c8a9a5SSteve French req->Flags = 0; /* MBZ */ 131338c8a9a5SSteve French cifs_dbg(FYI, "Fresh session. Previous: %llx\n", 131438c8a9a5SSteve French sess_data->previous_session); 131538c8a9a5SSteve French } 131638c8a9a5SSteve French 131738c8a9a5SSteve French /* enough to enable echos and oplocks and one max size write */ 13185e90aa21SShyam Prasad N if (server->credits >= server->max_credits) 13195e90aa21SShyam Prasad N req->hdr.CreditRequest = cpu_to_le16(0); 13205e90aa21SShyam Prasad N else 13215e90aa21SShyam Prasad N req->hdr.CreditRequest = cpu_to_le16( 13225e90aa21SShyam Prasad N min_t(int, server->max_credits - 13235e90aa21SShyam Prasad N server->credits, 130)); 132438c8a9a5SSteve French 132538c8a9a5SSteve French /* only one of SMB2 signing flags may be set in SMB2 request */ 132638c8a9a5SSteve French if (server->sign) 132738c8a9a5SSteve French req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED; 132838c8a9a5SSteve French else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */ 132938c8a9a5SSteve French req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED; 133038c8a9a5SSteve French else 133138c8a9a5SSteve French req->SecurityMode = 0; 133238c8a9a5SSteve French 133338c8a9a5SSteve French #ifdef CONFIG_CIFS_DFS_UPCALL 133438c8a9a5SSteve French req->Capabilities = cpu_to_le32(SMB2_GLOBAL_CAP_DFS); 133538c8a9a5SSteve French #else 133638c8a9a5SSteve French req->Capabilities = 0; 133738c8a9a5SSteve French #endif /* DFS_UPCALL */ 133838c8a9a5SSteve French 133938c8a9a5SSteve French req->Channel = 0; /* MBZ */ 134038c8a9a5SSteve French 134138c8a9a5SSteve French sess_data->iov[0].iov_base = (char *)req; 134238c8a9a5SSteve French /* 1 for pad */ 134338c8a9a5SSteve French sess_data->iov[0].iov_len = total_len - 1; 134438c8a9a5SSteve French /* 134538c8a9a5SSteve French * This variable will be used to clear the buffer 134638c8a9a5SSteve French * allocated above in case of any error in the calling function. 134738c8a9a5SSteve French */ 134838c8a9a5SSteve French sess_data->buf0_type = CIFS_SMALL_BUFFER; 134938c8a9a5SSteve French 135038c8a9a5SSteve French return 0; 135138c8a9a5SSteve French } 135238c8a9a5SSteve French 135338c8a9a5SSteve French static void 135438c8a9a5SSteve French SMB2_sess_free_buffer(struct SMB2_sess_data *sess_data) 135538c8a9a5SSteve French { 135638c8a9a5SSteve French struct kvec *iov = sess_data->iov; 135738c8a9a5SSteve French 135838c8a9a5SSteve French /* iov[1] is already freed by caller */ 135938c8a9a5SSteve French if (sess_data->buf0_type != CIFS_NO_BUFFER && iov[0].iov_base) 136038c8a9a5SSteve French memzero_explicit(iov[0].iov_base, iov[0].iov_len); 136138c8a9a5SSteve French 136238c8a9a5SSteve French free_rsp_buf(sess_data->buf0_type, iov[0].iov_base); 136338c8a9a5SSteve French sess_data->buf0_type = CIFS_NO_BUFFER; 136438c8a9a5SSteve French } 136538c8a9a5SSteve French 136638c8a9a5SSteve French static int 136738c8a9a5SSteve French SMB2_sess_sendreceive(struct SMB2_sess_data *sess_data) 136838c8a9a5SSteve French { 136938c8a9a5SSteve French int rc; 137038c8a9a5SSteve French struct smb_rqst rqst; 137138c8a9a5SSteve French struct smb2_sess_setup_req *req = sess_data->iov[0].iov_base; 137238c8a9a5SSteve French struct kvec rsp_iov = { NULL, 0 }; 137338c8a9a5SSteve French 137438c8a9a5SSteve French /* Testing shows that buffer offset must be at location of Buffer[0] */ 137538c8a9a5SSteve French req->SecurityBufferOffset = 137638c8a9a5SSteve French cpu_to_le16(sizeof(struct smb2_sess_setup_req)); 137738c8a9a5SSteve French req->SecurityBufferLength = cpu_to_le16(sess_data->iov[1].iov_len); 137838c8a9a5SSteve French 137938c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 138038c8a9a5SSteve French rqst.rq_iov = sess_data->iov; 138138c8a9a5SSteve French rqst.rq_nvec = 2; 138238c8a9a5SSteve French 138338c8a9a5SSteve French /* BB add code to build os and lm fields */ 138438c8a9a5SSteve French rc = cifs_send_recv(sess_data->xid, sess_data->ses, 138538c8a9a5SSteve French sess_data->server, 138638c8a9a5SSteve French &rqst, 138738c8a9a5SSteve French &sess_data->buf0_type, 138838c8a9a5SSteve French CIFS_LOG_ERROR | CIFS_SESS_OP, &rsp_iov); 138938c8a9a5SSteve French cifs_small_buf_release(sess_data->iov[0].iov_base); 139038c8a9a5SSteve French memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec)); 139138c8a9a5SSteve French 139238c8a9a5SSteve French return rc; 139338c8a9a5SSteve French } 139438c8a9a5SSteve French 139538c8a9a5SSteve French static int 139638c8a9a5SSteve French SMB2_sess_establish_session(struct SMB2_sess_data *sess_data) 139738c8a9a5SSteve French { 139838c8a9a5SSteve French int rc = 0; 139938c8a9a5SSteve French struct cifs_ses *ses = sess_data->ses; 140038c8a9a5SSteve French struct TCP_Server_Info *server = sess_data->server; 140138c8a9a5SSteve French 140238c8a9a5SSteve French cifs_server_lock(server); 140338c8a9a5SSteve French if (server->ops->generate_signingkey) { 140438c8a9a5SSteve French rc = server->ops->generate_signingkey(ses, server); 140538c8a9a5SSteve French if (rc) { 140638c8a9a5SSteve French cifs_dbg(FYI, 140738c8a9a5SSteve French "SMB3 session key generation failed\n"); 140838c8a9a5SSteve French cifs_server_unlock(server); 140938c8a9a5SSteve French return rc; 141038c8a9a5SSteve French } 141138c8a9a5SSteve French } 141238c8a9a5SSteve French if (!server->session_estab) { 141338c8a9a5SSteve French server->sequence_number = 0x2; 141438c8a9a5SSteve French server->session_estab = true; 141538c8a9a5SSteve French } 141638c8a9a5SSteve French cifs_server_unlock(server); 141738c8a9a5SSteve French 141838c8a9a5SSteve French cifs_dbg(FYI, "SMB2/3 session established successfully\n"); 141938c8a9a5SSteve French return rc; 142038c8a9a5SSteve French } 142138c8a9a5SSteve French 142238c8a9a5SSteve French #ifdef CONFIG_CIFS_UPCALL 142338c8a9a5SSteve French static void 142438c8a9a5SSteve French SMB2_auth_kerberos(struct SMB2_sess_data *sess_data) 142538c8a9a5SSteve French { 142638c8a9a5SSteve French int rc; 142738c8a9a5SSteve French struct cifs_ses *ses = sess_data->ses; 142838c8a9a5SSteve French struct TCP_Server_Info *server = sess_data->server; 142938c8a9a5SSteve French struct cifs_spnego_msg *msg; 143038c8a9a5SSteve French struct key *spnego_key = NULL; 143138c8a9a5SSteve French struct smb2_sess_setup_rsp *rsp = NULL; 143238c8a9a5SSteve French bool is_binding = false; 143338c8a9a5SSteve French 143438c8a9a5SSteve French rc = SMB2_sess_alloc_buffer(sess_data); 143538c8a9a5SSteve French if (rc) 143638c8a9a5SSteve French goto out; 143738c8a9a5SSteve French 143838c8a9a5SSteve French spnego_key = cifs_get_spnego_key(ses, server); 143938c8a9a5SSteve French if (IS_ERR(spnego_key)) { 144038c8a9a5SSteve French rc = PTR_ERR(spnego_key); 144138c8a9a5SSteve French if (rc == -ENOKEY) 144238c8a9a5SSteve French cifs_dbg(VFS, "Verify user has a krb5 ticket and keyutils is installed\n"); 144338c8a9a5SSteve French spnego_key = NULL; 144438c8a9a5SSteve French goto out; 144538c8a9a5SSteve French } 144638c8a9a5SSteve French 144738c8a9a5SSteve French msg = spnego_key->payload.data[0]; 144838c8a9a5SSteve French /* 144938c8a9a5SSteve French * check version field to make sure that cifs.upcall is 145038c8a9a5SSteve French * sending us a response in an expected form 145138c8a9a5SSteve French */ 145238c8a9a5SSteve French if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) { 145338c8a9a5SSteve French cifs_dbg(VFS, "bad cifs.upcall version. Expected %d got %d\n", 145438c8a9a5SSteve French CIFS_SPNEGO_UPCALL_VERSION, msg->version); 145538c8a9a5SSteve French rc = -EKEYREJECTED; 145638c8a9a5SSteve French goto out_put_spnego_key; 145738c8a9a5SSteve French } 145838c8a9a5SSteve French 145938c8a9a5SSteve French spin_lock(&ses->ses_lock); 146038c8a9a5SSteve French is_binding = (ses->ses_status == SES_GOOD); 146138c8a9a5SSteve French spin_unlock(&ses->ses_lock); 146238c8a9a5SSteve French 146338c8a9a5SSteve French /* keep session key if binding */ 146438c8a9a5SSteve French if (!is_binding) { 146538c8a9a5SSteve French kfree_sensitive(ses->auth_key.response); 146638c8a9a5SSteve French ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len, 146738c8a9a5SSteve French GFP_KERNEL); 146838c8a9a5SSteve French if (!ses->auth_key.response) { 146938c8a9a5SSteve French cifs_dbg(VFS, "Kerberos can't allocate (%u bytes) memory\n", 147038c8a9a5SSteve French msg->sesskey_len); 147138c8a9a5SSteve French rc = -ENOMEM; 147238c8a9a5SSteve French goto out_put_spnego_key; 147338c8a9a5SSteve French } 147438c8a9a5SSteve French ses->auth_key.len = msg->sesskey_len; 147538c8a9a5SSteve French } 147638c8a9a5SSteve French 147738c8a9a5SSteve French sess_data->iov[1].iov_base = msg->data + msg->sesskey_len; 147838c8a9a5SSteve French sess_data->iov[1].iov_len = msg->secblob_len; 147938c8a9a5SSteve French 148038c8a9a5SSteve French rc = SMB2_sess_sendreceive(sess_data); 148138c8a9a5SSteve French if (rc) 148238c8a9a5SSteve French goto out_put_spnego_key; 148338c8a9a5SSteve French 148438c8a9a5SSteve French rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base; 148538c8a9a5SSteve French /* keep session id and flags if binding */ 148638c8a9a5SSteve French if (!is_binding) { 148738c8a9a5SSteve French ses->Suid = le64_to_cpu(rsp->hdr.SessionId); 148838c8a9a5SSteve French ses->session_flags = le16_to_cpu(rsp->SessionFlags); 148938c8a9a5SSteve French } 149038c8a9a5SSteve French 149138c8a9a5SSteve French rc = SMB2_sess_establish_session(sess_data); 149238c8a9a5SSteve French out_put_spnego_key: 149338c8a9a5SSteve French key_invalidate(spnego_key); 149438c8a9a5SSteve French key_put(spnego_key); 149538c8a9a5SSteve French if (rc) { 149638c8a9a5SSteve French kfree_sensitive(ses->auth_key.response); 149738c8a9a5SSteve French ses->auth_key.response = NULL; 149838c8a9a5SSteve French ses->auth_key.len = 0; 149938c8a9a5SSteve French } 150038c8a9a5SSteve French out: 150138c8a9a5SSteve French sess_data->result = rc; 150238c8a9a5SSteve French sess_data->func = NULL; 150338c8a9a5SSteve French SMB2_sess_free_buffer(sess_data); 150438c8a9a5SSteve French } 150538c8a9a5SSteve French #else 150638c8a9a5SSteve French static void 150738c8a9a5SSteve French SMB2_auth_kerberos(struct SMB2_sess_data *sess_data) 150838c8a9a5SSteve French { 150938c8a9a5SSteve French cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n"); 151038c8a9a5SSteve French sess_data->result = -EOPNOTSUPP; 151138c8a9a5SSteve French sess_data->func = NULL; 151238c8a9a5SSteve French } 151338c8a9a5SSteve French #endif 151438c8a9a5SSteve French 151538c8a9a5SSteve French static void 151638c8a9a5SSteve French SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data); 151738c8a9a5SSteve French 151838c8a9a5SSteve French static void 151938c8a9a5SSteve French SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data) 152038c8a9a5SSteve French { 152138c8a9a5SSteve French int rc; 152238c8a9a5SSteve French struct cifs_ses *ses = sess_data->ses; 152338c8a9a5SSteve French struct TCP_Server_Info *server = sess_data->server; 152438c8a9a5SSteve French struct smb2_sess_setup_rsp *rsp = NULL; 152538c8a9a5SSteve French unsigned char *ntlmssp_blob = NULL; 152638c8a9a5SSteve French bool use_spnego = false; /* else use raw ntlmssp */ 152738c8a9a5SSteve French u16 blob_length = 0; 152838c8a9a5SSteve French bool is_binding = false; 152938c8a9a5SSteve French 153038c8a9a5SSteve French /* 153138c8a9a5SSteve French * If memory allocation is successful, caller of this function 153238c8a9a5SSteve French * frees it. 153338c8a9a5SSteve French */ 153438c8a9a5SSteve French ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL); 153538c8a9a5SSteve French if (!ses->ntlmssp) { 153638c8a9a5SSteve French rc = -ENOMEM; 153738c8a9a5SSteve French goto out_err; 153838c8a9a5SSteve French } 153938c8a9a5SSteve French ses->ntlmssp->sesskey_per_smbsess = true; 154038c8a9a5SSteve French 154138c8a9a5SSteve French rc = SMB2_sess_alloc_buffer(sess_data); 154238c8a9a5SSteve French if (rc) 154338c8a9a5SSteve French goto out_err; 154438c8a9a5SSteve French 154538c8a9a5SSteve French rc = build_ntlmssp_smb3_negotiate_blob(&ntlmssp_blob, 154638c8a9a5SSteve French &blob_length, ses, server, 154738c8a9a5SSteve French sess_data->nls_cp); 154838c8a9a5SSteve French if (rc) 154938c8a9a5SSteve French goto out; 155038c8a9a5SSteve French 155138c8a9a5SSteve French if (use_spnego) { 155238c8a9a5SSteve French /* BB eventually need to add this */ 155338c8a9a5SSteve French cifs_dbg(VFS, "spnego not supported for SMB2 yet\n"); 155438c8a9a5SSteve French rc = -EOPNOTSUPP; 155538c8a9a5SSteve French goto out; 155638c8a9a5SSteve French } 155738c8a9a5SSteve French sess_data->iov[1].iov_base = ntlmssp_blob; 155838c8a9a5SSteve French sess_data->iov[1].iov_len = blob_length; 155938c8a9a5SSteve French 156038c8a9a5SSteve French rc = SMB2_sess_sendreceive(sess_data); 156138c8a9a5SSteve French rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base; 156238c8a9a5SSteve French 156338c8a9a5SSteve French /* If true, rc here is expected and not an error */ 156438c8a9a5SSteve French if (sess_data->buf0_type != CIFS_NO_BUFFER && 156538c8a9a5SSteve French rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) 156638c8a9a5SSteve French rc = 0; 156738c8a9a5SSteve French 156838c8a9a5SSteve French if (rc) 156938c8a9a5SSteve French goto out; 157038c8a9a5SSteve French 157138c8a9a5SSteve French if (offsetof(struct smb2_sess_setup_rsp, Buffer) != 157238c8a9a5SSteve French le16_to_cpu(rsp->SecurityBufferOffset)) { 157338c8a9a5SSteve French cifs_dbg(VFS, "Invalid security buffer offset %d\n", 157438c8a9a5SSteve French le16_to_cpu(rsp->SecurityBufferOffset)); 157538c8a9a5SSteve French rc = -EIO; 157638c8a9a5SSteve French goto out; 157738c8a9a5SSteve French } 157838c8a9a5SSteve French rc = decode_ntlmssp_challenge(rsp->Buffer, 157938c8a9a5SSteve French le16_to_cpu(rsp->SecurityBufferLength), ses); 158038c8a9a5SSteve French if (rc) 158138c8a9a5SSteve French goto out; 158238c8a9a5SSteve French 158338c8a9a5SSteve French cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n"); 158438c8a9a5SSteve French 158538c8a9a5SSteve French spin_lock(&ses->ses_lock); 158638c8a9a5SSteve French is_binding = (ses->ses_status == SES_GOOD); 158738c8a9a5SSteve French spin_unlock(&ses->ses_lock); 158838c8a9a5SSteve French 158938c8a9a5SSteve French /* keep existing ses id and flags if binding */ 159038c8a9a5SSteve French if (!is_binding) { 159138c8a9a5SSteve French ses->Suid = le64_to_cpu(rsp->hdr.SessionId); 159238c8a9a5SSteve French ses->session_flags = le16_to_cpu(rsp->SessionFlags); 159338c8a9a5SSteve French } 159438c8a9a5SSteve French 159538c8a9a5SSteve French out: 159638c8a9a5SSteve French kfree_sensitive(ntlmssp_blob); 159738c8a9a5SSteve French SMB2_sess_free_buffer(sess_data); 159838c8a9a5SSteve French if (!rc) { 159938c8a9a5SSteve French sess_data->result = 0; 160038c8a9a5SSteve French sess_data->func = SMB2_sess_auth_rawntlmssp_authenticate; 160138c8a9a5SSteve French return; 160238c8a9a5SSteve French } 160338c8a9a5SSteve French out_err: 160438c8a9a5SSteve French kfree_sensitive(ses->ntlmssp); 160538c8a9a5SSteve French ses->ntlmssp = NULL; 160638c8a9a5SSteve French sess_data->result = rc; 160738c8a9a5SSteve French sess_data->func = NULL; 160838c8a9a5SSteve French } 160938c8a9a5SSteve French 161038c8a9a5SSteve French static void 161138c8a9a5SSteve French SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data) 161238c8a9a5SSteve French { 161338c8a9a5SSteve French int rc; 161438c8a9a5SSteve French struct cifs_ses *ses = sess_data->ses; 161538c8a9a5SSteve French struct TCP_Server_Info *server = sess_data->server; 161638c8a9a5SSteve French struct smb2_sess_setup_req *req; 161738c8a9a5SSteve French struct smb2_sess_setup_rsp *rsp = NULL; 161838c8a9a5SSteve French unsigned char *ntlmssp_blob = NULL; 161938c8a9a5SSteve French bool use_spnego = false; /* else use raw ntlmssp */ 162038c8a9a5SSteve French u16 blob_length = 0; 162138c8a9a5SSteve French bool is_binding = false; 162238c8a9a5SSteve French 162338c8a9a5SSteve French rc = SMB2_sess_alloc_buffer(sess_data); 162438c8a9a5SSteve French if (rc) 162538c8a9a5SSteve French goto out; 162638c8a9a5SSteve French 162738c8a9a5SSteve French req = (struct smb2_sess_setup_req *) sess_data->iov[0].iov_base; 162838c8a9a5SSteve French req->hdr.SessionId = cpu_to_le64(ses->Suid); 162938c8a9a5SSteve French 163038c8a9a5SSteve French rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, 163138c8a9a5SSteve French ses, server, 163238c8a9a5SSteve French sess_data->nls_cp); 163338c8a9a5SSteve French if (rc) { 163438c8a9a5SSteve French cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", rc); 163538c8a9a5SSteve French goto out; 163638c8a9a5SSteve French } 163738c8a9a5SSteve French 163838c8a9a5SSteve French if (use_spnego) { 163938c8a9a5SSteve French /* BB eventually need to add this */ 164038c8a9a5SSteve French cifs_dbg(VFS, "spnego not supported for SMB2 yet\n"); 164138c8a9a5SSteve French rc = -EOPNOTSUPP; 164238c8a9a5SSteve French goto out; 164338c8a9a5SSteve French } 164438c8a9a5SSteve French sess_data->iov[1].iov_base = ntlmssp_blob; 164538c8a9a5SSteve French sess_data->iov[1].iov_len = blob_length; 164638c8a9a5SSteve French 164738c8a9a5SSteve French rc = SMB2_sess_sendreceive(sess_data); 164838c8a9a5SSteve French if (rc) 164938c8a9a5SSteve French goto out; 165038c8a9a5SSteve French 165138c8a9a5SSteve French rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base; 165238c8a9a5SSteve French 165338c8a9a5SSteve French spin_lock(&ses->ses_lock); 165438c8a9a5SSteve French is_binding = (ses->ses_status == SES_GOOD); 165538c8a9a5SSteve French spin_unlock(&ses->ses_lock); 165638c8a9a5SSteve French 165738c8a9a5SSteve French /* keep existing ses id and flags if binding */ 165838c8a9a5SSteve French if (!is_binding) { 165938c8a9a5SSteve French ses->Suid = le64_to_cpu(rsp->hdr.SessionId); 166038c8a9a5SSteve French ses->session_flags = le16_to_cpu(rsp->SessionFlags); 166138c8a9a5SSteve French } 166238c8a9a5SSteve French 166338c8a9a5SSteve French rc = SMB2_sess_establish_session(sess_data); 166438c8a9a5SSteve French #ifdef CONFIG_CIFS_DEBUG_DUMP_KEYS 166538c8a9a5SSteve French if (ses->server->dialect < SMB30_PROT_ID) { 166638c8a9a5SSteve French cifs_dbg(VFS, "%s: dumping generated SMB2 session keys\n", __func__); 166738c8a9a5SSteve French /* 166838c8a9a5SSteve French * The session id is opaque in terms of endianness, so we can't 166938c8a9a5SSteve French * print it as a long long. we dump it as we got it on the wire 167038c8a9a5SSteve French */ 167138c8a9a5SSteve French cifs_dbg(VFS, "Session Id %*ph\n", (int)sizeof(ses->Suid), 167238c8a9a5SSteve French &ses->Suid); 167338c8a9a5SSteve French cifs_dbg(VFS, "Session Key %*ph\n", 167438c8a9a5SSteve French SMB2_NTLMV2_SESSKEY_SIZE, ses->auth_key.response); 167538c8a9a5SSteve French cifs_dbg(VFS, "Signing Key %*ph\n", 167638c8a9a5SSteve French SMB3_SIGN_KEY_SIZE, ses->auth_key.response); 167738c8a9a5SSteve French } 167838c8a9a5SSteve French #endif 167938c8a9a5SSteve French out: 168038c8a9a5SSteve French kfree_sensitive(ntlmssp_blob); 168138c8a9a5SSteve French SMB2_sess_free_buffer(sess_data); 168238c8a9a5SSteve French kfree_sensitive(ses->ntlmssp); 168338c8a9a5SSteve French ses->ntlmssp = NULL; 168438c8a9a5SSteve French sess_data->result = rc; 168538c8a9a5SSteve French sess_data->func = NULL; 168638c8a9a5SSteve French } 168738c8a9a5SSteve French 168838c8a9a5SSteve French static int 168938c8a9a5SSteve French SMB2_select_sec(struct SMB2_sess_data *sess_data) 169038c8a9a5SSteve French { 169138c8a9a5SSteve French int type; 169238c8a9a5SSteve French struct cifs_ses *ses = sess_data->ses; 169338c8a9a5SSteve French struct TCP_Server_Info *server = sess_data->server; 169438c8a9a5SSteve French 169538c8a9a5SSteve French type = smb2_select_sectype(server, ses->sectype); 169638c8a9a5SSteve French cifs_dbg(FYI, "sess setup type %d\n", type); 169738c8a9a5SSteve French if (type == Unspecified) { 169838c8a9a5SSteve French cifs_dbg(VFS, "Unable to select appropriate authentication method!\n"); 169938c8a9a5SSteve French return -EINVAL; 170038c8a9a5SSteve French } 170138c8a9a5SSteve French 170238c8a9a5SSteve French switch (type) { 170338c8a9a5SSteve French case Kerberos: 170438c8a9a5SSteve French sess_data->func = SMB2_auth_kerberos; 170538c8a9a5SSteve French break; 170638c8a9a5SSteve French case RawNTLMSSP: 170738c8a9a5SSteve French sess_data->func = SMB2_sess_auth_rawntlmssp_negotiate; 170838c8a9a5SSteve French break; 170938c8a9a5SSteve French default: 171038c8a9a5SSteve French cifs_dbg(VFS, "secType %d not supported!\n", type); 171138c8a9a5SSteve French return -EOPNOTSUPP; 171238c8a9a5SSteve French } 171338c8a9a5SSteve French 171438c8a9a5SSteve French return 0; 171538c8a9a5SSteve French } 171638c8a9a5SSteve French 171738c8a9a5SSteve French int 171838c8a9a5SSteve French SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses, 171938c8a9a5SSteve French struct TCP_Server_Info *server, 172038c8a9a5SSteve French const struct nls_table *nls_cp) 172138c8a9a5SSteve French { 172238c8a9a5SSteve French int rc = 0; 172338c8a9a5SSteve French struct SMB2_sess_data *sess_data; 172438c8a9a5SSteve French 172538c8a9a5SSteve French cifs_dbg(FYI, "Session Setup\n"); 172638c8a9a5SSteve French 172738c8a9a5SSteve French if (!server) { 172838c8a9a5SSteve French WARN(1, "%s: server is NULL!\n", __func__); 172938c8a9a5SSteve French return -EIO; 173038c8a9a5SSteve French } 173138c8a9a5SSteve French 173238c8a9a5SSteve French sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL); 173338c8a9a5SSteve French if (!sess_data) 173438c8a9a5SSteve French return -ENOMEM; 173538c8a9a5SSteve French 173638c8a9a5SSteve French sess_data->xid = xid; 173738c8a9a5SSteve French sess_data->ses = ses; 173838c8a9a5SSteve French sess_data->server = server; 173938c8a9a5SSteve French sess_data->buf0_type = CIFS_NO_BUFFER; 174038c8a9a5SSteve French sess_data->nls_cp = (struct nls_table *) nls_cp; 174138c8a9a5SSteve French sess_data->previous_session = ses->Suid; 174238c8a9a5SSteve French 174338c8a9a5SSteve French rc = SMB2_select_sec(sess_data); 174438c8a9a5SSteve French if (rc) 174538c8a9a5SSteve French goto out; 174638c8a9a5SSteve French 174738c8a9a5SSteve French /* 174838c8a9a5SSteve French * Initialize the session hash with the server one. 174938c8a9a5SSteve French */ 175038c8a9a5SSteve French memcpy(ses->preauth_sha_hash, server->preauth_sha_hash, 175138c8a9a5SSteve French SMB2_PREAUTH_HASH_SIZE); 175238c8a9a5SSteve French 175338c8a9a5SSteve French while (sess_data->func) 175438c8a9a5SSteve French sess_data->func(sess_data); 175538c8a9a5SSteve French 175638c8a9a5SSteve French if ((ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) && (ses->sign)) 175738c8a9a5SSteve French cifs_server_dbg(VFS, "signing requested but authenticated as guest\n"); 175838c8a9a5SSteve French rc = sess_data->result; 175938c8a9a5SSteve French out: 176038c8a9a5SSteve French kfree_sensitive(sess_data); 176138c8a9a5SSteve French return rc; 176238c8a9a5SSteve French } 176338c8a9a5SSteve French 176438c8a9a5SSteve French int 176538c8a9a5SSteve French SMB2_logoff(const unsigned int xid, struct cifs_ses *ses) 176638c8a9a5SSteve French { 176738c8a9a5SSteve French struct smb_rqst rqst; 176838c8a9a5SSteve French struct smb2_logoff_req *req; /* response is also trivial struct */ 176938c8a9a5SSteve French int rc = 0; 177038c8a9a5SSteve French struct TCP_Server_Info *server; 177138c8a9a5SSteve French int flags = 0; 177238c8a9a5SSteve French unsigned int total_len; 177338c8a9a5SSteve French struct kvec iov[1]; 177438c8a9a5SSteve French struct kvec rsp_iov; 177538c8a9a5SSteve French int resp_buf_type; 177638c8a9a5SSteve French 177738c8a9a5SSteve French cifs_dbg(FYI, "disconnect session %p\n", ses); 177838c8a9a5SSteve French 177938c8a9a5SSteve French if (ses && (ses->server)) 178038c8a9a5SSteve French server = ses->server; 178138c8a9a5SSteve French else 178238c8a9a5SSteve French return -EIO; 178338c8a9a5SSteve French 178438c8a9a5SSteve French /* no need to send SMB logoff if uid already closed due to reconnect */ 178538c8a9a5SSteve French spin_lock(&ses->chan_lock); 178638c8a9a5SSteve French if (CIFS_ALL_CHANS_NEED_RECONNECT(ses)) { 178738c8a9a5SSteve French spin_unlock(&ses->chan_lock); 178838c8a9a5SSteve French goto smb2_session_already_dead; 178938c8a9a5SSteve French } 179038c8a9a5SSteve French spin_unlock(&ses->chan_lock); 179138c8a9a5SSteve French 179238c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_LOGOFF, NULL, ses->server, 179338c8a9a5SSteve French (void **) &req, &total_len); 179438c8a9a5SSteve French if (rc) 179538c8a9a5SSteve French return rc; 179638c8a9a5SSteve French 179738c8a9a5SSteve French /* since no tcon, smb2_init can not do this, so do here */ 179838c8a9a5SSteve French req->hdr.SessionId = cpu_to_le64(ses->Suid); 179938c8a9a5SSteve French 180038c8a9a5SSteve French if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) 180138c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 180238c8a9a5SSteve French else if (server->sign) 180338c8a9a5SSteve French req->hdr.Flags |= SMB2_FLAGS_SIGNED; 180438c8a9a5SSteve French 180538c8a9a5SSteve French flags |= CIFS_NO_RSP_BUF; 180638c8a9a5SSteve French 180738c8a9a5SSteve French iov[0].iov_base = (char *)req; 180838c8a9a5SSteve French iov[0].iov_len = total_len; 180938c8a9a5SSteve French 181038c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 181138c8a9a5SSteve French rqst.rq_iov = iov; 181238c8a9a5SSteve French rqst.rq_nvec = 1; 181338c8a9a5SSteve French 181438c8a9a5SSteve French rc = cifs_send_recv(xid, ses, ses->server, 181538c8a9a5SSteve French &rqst, &resp_buf_type, flags, &rsp_iov); 181638c8a9a5SSteve French cifs_small_buf_release(req); 181738c8a9a5SSteve French /* 181838c8a9a5SSteve French * No tcon so can't do 181938c8a9a5SSteve French * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); 182038c8a9a5SSteve French */ 182138c8a9a5SSteve French 182238c8a9a5SSteve French smb2_session_already_dead: 182338c8a9a5SSteve French return rc; 182438c8a9a5SSteve French } 182538c8a9a5SSteve French 182638c8a9a5SSteve French static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code) 182738c8a9a5SSteve French { 182838c8a9a5SSteve French cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]); 182938c8a9a5SSteve French } 183038c8a9a5SSteve French 183138c8a9a5SSteve French #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */) 183238c8a9a5SSteve French 183338c8a9a5SSteve French /* These are similar values to what Windows uses */ 183438c8a9a5SSteve French static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon) 183538c8a9a5SSteve French { 183638c8a9a5SSteve French tcon->max_chunks = 256; 183738c8a9a5SSteve French tcon->max_bytes_chunk = 1048576; 183838c8a9a5SSteve French tcon->max_bytes_copy = 16777216; 183938c8a9a5SSteve French } 184038c8a9a5SSteve French 184138c8a9a5SSteve French int 184238c8a9a5SSteve French SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree, 184338c8a9a5SSteve French struct cifs_tcon *tcon, const struct nls_table *cp) 184438c8a9a5SSteve French { 184538c8a9a5SSteve French struct smb_rqst rqst; 184638c8a9a5SSteve French struct smb2_tree_connect_req *req; 184738c8a9a5SSteve French struct smb2_tree_connect_rsp *rsp = NULL; 184838c8a9a5SSteve French struct kvec iov[2]; 184938c8a9a5SSteve French struct kvec rsp_iov = { NULL, 0 }; 185038c8a9a5SSteve French int rc = 0; 185138c8a9a5SSteve French int resp_buftype; 185238c8a9a5SSteve French int unc_path_len; 185338c8a9a5SSteve French __le16 *unc_path = NULL; 185438c8a9a5SSteve French int flags = 0; 185538c8a9a5SSteve French unsigned int total_len; 185638c8a9a5SSteve French struct TCP_Server_Info *server; 185738c8a9a5SSteve French 185838c8a9a5SSteve French /* always use master channel */ 185938c8a9a5SSteve French server = ses->server; 186038c8a9a5SSteve French 186138c8a9a5SSteve French cifs_dbg(FYI, "TCON\n"); 186238c8a9a5SSteve French 186338c8a9a5SSteve French if (!server || !tree) 186438c8a9a5SSteve French return -EIO; 186538c8a9a5SSteve French 186638c8a9a5SSteve French unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL); 186738c8a9a5SSteve French if (unc_path == NULL) 186838c8a9a5SSteve French return -ENOMEM; 186938c8a9a5SSteve French 187038c8a9a5SSteve French unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp); 187138c8a9a5SSteve French if (unc_path_len <= 0) { 187238c8a9a5SSteve French kfree(unc_path); 187338c8a9a5SSteve French return -EINVAL; 187438c8a9a5SSteve French } 187538c8a9a5SSteve French unc_path_len *= 2; 187638c8a9a5SSteve French 187738c8a9a5SSteve French /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */ 187838c8a9a5SSteve French tcon->tid = 0; 187938c8a9a5SSteve French atomic_set(&tcon->num_remote_opens, 0); 188038c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_TREE_CONNECT, tcon, server, 188138c8a9a5SSteve French (void **) &req, &total_len); 188238c8a9a5SSteve French if (rc) { 188338c8a9a5SSteve French kfree(unc_path); 188438c8a9a5SSteve French return rc; 188538c8a9a5SSteve French } 188638c8a9a5SSteve French 188738c8a9a5SSteve French if (smb3_encryption_required(tcon)) 188838c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 188938c8a9a5SSteve French 189038c8a9a5SSteve French iov[0].iov_base = (char *)req; 189138c8a9a5SSteve French /* 1 for pad */ 189238c8a9a5SSteve French iov[0].iov_len = total_len - 1; 189338c8a9a5SSteve French 189438c8a9a5SSteve French /* Testing shows that buffer offset must be at location of Buffer[0] */ 189538c8a9a5SSteve French req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)); 189638c8a9a5SSteve French req->PathLength = cpu_to_le16(unc_path_len); 189738c8a9a5SSteve French iov[1].iov_base = unc_path; 189838c8a9a5SSteve French iov[1].iov_len = unc_path_len; 189938c8a9a5SSteve French 190038c8a9a5SSteve French /* 190138c8a9a5SSteve French * 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1 190238c8a9a5SSteve French * unless it is guest or anonymous user. See MS-SMB2 3.2.5.3.1 190338c8a9a5SSteve French * (Samba servers don't always set the flag so also check if null user) 190438c8a9a5SSteve French */ 190538c8a9a5SSteve French if ((server->dialect == SMB311_PROT_ID) && 190638c8a9a5SSteve French !smb3_encryption_required(tcon) && 190738c8a9a5SSteve French !(ses->session_flags & 190838c8a9a5SSteve French (SMB2_SESSION_FLAG_IS_GUEST|SMB2_SESSION_FLAG_IS_NULL)) && 190938c8a9a5SSteve French ((ses->user_name != NULL) || (ses->sectype == Kerberos))) 191038c8a9a5SSteve French req->hdr.Flags |= SMB2_FLAGS_SIGNED; 191138c8a9a5SSteve French 191238c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 191338c8a9a5SSteve French rqst.rq_iov = iov; 191438c8a9a5SSteve French rqst.rq_nvec = 2; 191538c8a9a5SSteve French 191638c8a9a5SSteve French /* Need 64 for max size write so ask for more in case not there yet */ 19175e90aa21SShyam Prasad N if (server->credits >= server->max_credits) 19185e90aa21SShyam Prasad N req->hdr.CreditRequest = cpu_to_le16(0); 19195e90aa21SShyam Prasad N else 19205e90aa21SShyam Prasad N req->hdr.CreditRequest = cpu_to_le16( 19215e90aa21SShyam Prasad N min_t(int, server->max_credits - 19225e90aa21SShyam Prasad N server->credits, 64)); 192338c8a9a5SSteve French 192438c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 192538c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 192638c8a9a5SSteve French cifs_small_buf_release(req); 192738c8a9a5SSteve French rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base; 192838c8a9a5SSteve French trace_smb3_tcon(xid, tcon->tid, ses->Suid, tree, rc); 192938c8a9a5SSteve French if ((rc != 0) || (rsp == NULL)) { 193038c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE); 193138c8a9a5SSteve French tcon->need_reconnect = true; 193238c8a9a5SSteve French goto tcon_error_exit; 193338c8a9a5SSteve French } 193438c8a9a5SSteve French 193538c8a9a5SSteve French switch (rsp->ShareType) { 193638c8a9a5SSteve French case SMB2_SHARE_TYPE_DISK: 193738c8a9a5SSteve French cifs_dbg(FYI, "connection to disk share\n"); 193838c8a9a5SSteve French break; 193938c8a9a5SSteve French case SMB2_SHARE_TYPE_PIPE: 194038c8a9a5SSteve French tcon->pipe = true; 194138c8a9a5SSteve French cifs_dbg(FYI, "connection to pipe share\n"); 194238c8a9a5SSteve French break; 194338c8a9a5SSteve French case SMB2_SHARE_TYPE_PRINT: 194438c8a9a5SSteve French tcon->print = true; 194538c8a9a5SSteve French cifs_dbg(FYI, "connection to printer\n"); 194638c8a9a5SSteve French break; 194738c8a9a5SSteve French default: 194838c8a9a5SSteve French cifs_server_dbg(VFS, "unknown share type %d\n", rsp->ShareType); 194938c8a9a5SSteve French rc = -EOPNOTSUPP; 195038c8a9a5SSteve French goto tcon_error_exit; 195138c8a9a5SSteve French } 195238c8a9a5SSteve French 195338c8a9a5SSteve French tcon->share_flags = le32_to_cpu(rsp->ShareFlags); 195438c8a9a5SSteve French tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */ 195538c8a9a5SSteve French tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess); 195638c8a9a5SSteve French tcon->tid = le32_to_cpu(rsp->hdr.Id.SyncId.TreeId); 195738c8a9a5SSteve French strscpy(tcon->tree_name, tree, sizeof(tcon->tree_name)); 195838c8a9a5SSteve French 195938c8a9a5SSteve French if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) && 196038c8a9a5SSteve French ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0)) 196138c8a9a5SSteve French cifs_tcon_dbg(VFS, "DFS capability contradicts DFS flag\n"); 196238c8a9a5SSteve French 196338c8a9a5SSteve French if (tcon->seal && 196438c8a9a5SSteve French !(server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION)) 196538c8a9a5SSteve French cifs_tcon_dbg(VFS, "Encryption is requested but not supported\n"); 196638c8a9a5SSteve French 196738c8a9a5SSteve French init_copy_chunk_defaults(tcon); 196838c8a9a5SSteve French if (server->ops->validate_negotiate) 196938c8a9a5SSteve French rc = server->ops->validate_negotiate(xid, tcon); 197038c8a9a5SSteve French if (rc == 0) /* See MS-SMB2 2.2.10 and 3.2.5.5 */ 197138c8a9a5SSteve French if (tcon->share_flags & SMB2_SHAREFLAG_ISOLATED_TRANSPORT) 197238c8a9a5SSteve French server->nosharesock = true; 197338c8a9a5SSteve French tcon_exit: 197438c8a9a5SSteve French 197538c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp); 197638c8a9a5SSteve French kfree(unc_path); 197738c8a9a5SSteve French return rc; 197838c8a9a5SSteve French 197938c8a9a5SSteve French tcon_error_exit: 198038c8a9a5SSteve French if (rsp && rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) 198138c8a9a5SSteve French cifs_tcon_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree); 198238c8a9a5SSteve French goto tcon_exit; 198338c8a9a5SSteve French } 198438c8a9a5SSteve French 198538c8a9a5SSteve French int 198638c8a9a5SSteve French SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon) 198738c8a9a5SSteve French { 198838c8a9a5SSteve French struct smb_rqst rqst; 198938c8a9a5SSteve French struct smb2_tree_disconnect_req *req; /* response is trivial */ 199038c8a9a5SSteve French int rc = 0; 199138c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 199238c8a9a5SSteve French int flags = 0; 199338c8a9a5SSteve French unsigned int total_len; 199438c8a9a5SSteve French struct kvec iov[1]; 199538c8a9a5SSteve French struct kvec rsp_iov; 199638c8a9a5SSteve French int resp_buf_type; 199738c8a9a5SSteve French 199838c8a9a5SSteve French cifs_dbg(FYI, "Tree Disconnect\n"); 199938c8a9a5SSteve French 200038c8a9a5SSteve French if (!ses || !(ses->server)) 200138c8a9a5SSteve French return -EIO; 200238c8a9a5SSteve French 200338c8a9a5SSteve French trace_smb3_tdis_enter(xid, tcon->tid, ses->Suid, tcon->tree_name); 200438c8a9a5SSteve French spin_lock(&ses->chan_lock); 200538c8a9a5SSteve French if ((tcon->need_reconnect) || 200638c8a9a5SSteve French (CIFS_ALL_CHANS_NEED_RECONNECT(tcon->ses))) { 200738c8a9a5SSteve French spin_unlock(&ses->chan_lock); 200838c8a9a5SSteve French return 0; 200938c8a9a5SSteve French } 201038c8a9a5SSteve French spin_unlock(&ses->chan_lock); 201138c8a9a5SSteve French 201238c8a9a5SSteve French invalidate_all_cached_dirs(tcon); 201338c8a9a5SSteve French 201438c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_TREE_DISCONNECT, tcon, ses->server, 201538c8a9a5SSteve French (void **) &req, 201638c8a9a5SSteve French &total_len); 201738c8a9a5SSteve French if (rc) 201838c8a9a5SSteve French return rc; 201938c8a9a5SSteve French 202038c8a9a5SSteve French if (smb3_encryption_required(tcon)) 202138c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 202238c8a9a5SSteve French 202338c8a9a5SSteve French flags |= CIFS_NO_RSP_BUF; 202438c8a9a5SSteve French 202538c8a9a5SSteve French iov[0].iov_base = (char *)req; 202638c8a9a5SSteve French iov[0].iov_len = total_len; 202738c8a9a5SSteve French 202838c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 202938c8a9a5SSteve French rqst.rq_iov = iov; 203038c8a9a5SSteve French rqst.rq_nvec = 1; 203138c8a9a5SSteve French 203238c8a9a5SSteve French rc = cifs_send_recv(xid, ses, ses->server, 203338c8a9a5SSteve French &rqst, &resp_buf_type, flags, &rsp_iov); 203438c8a9a5SSteve French cifs_small_buf_release(req); 203538c8a9a5SSteve French if (rc) { 203638c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE); 203738c8a9a5SSteve French trace_smb3_tdis_err(xid, tcon->tid, ses->Suid, rc); 203838c8a9a5SSteve French } 203938c8a9a5SSteve French trace_smb3_tdis_done(xid, tcon->tid, ses->Suid); 204038c8a9a5SSteve French 204138c8a9a5SSteve French return rc; 204238c8a9a5SSteve French } 204338c8a9a5SSteve French 204438c8a9a5SSteve French 204538c8a9a5SSteve French static struct create_durable * 204638c8a9a5SSteve French create_durable_buf(void) 204738c8a9a5SSteve French { 204838c8a9a5SSteve French struct create_durable *buf; 204938c8a9a5SSteve French 205038c8a9a5SSteve French buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL); 205138c8a9a5SSteve French if (!buf) 205238c8a9a5SSteve French return NULL; 205338c8a9a5SSteve French 205438c8a9a5SSteve French buf->ccontext.DataOffset = cpu_to_le16(offsetof 205538c8a9a5SSteve French (struct create_durable, Data)); 205638c8a9a5SSteve French buf->ccontext.DataLength = cpu_to_le32(16); 205738c8a9a5SSteve French buf->ccontext.NameOffset = cpu_to_le16(offsetof 205838c8a9a5SSteve French (struct create_durable, Name)); 205938c8a9a5SSteve French buf->ccontext.NameLength = cpu_to_le16(4); 206038c8a9a5SSteve French /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */ 206138c8a9a5SSteve French buf->Name[0] = 'D'; 206238c8a9a5SSteve French buf->Name[1] = 'H'; 206338c8a9a5SSteve French buf->Name[2] = 'n'; 206438c8a9a5SSteve French buf->Name[3] = 'Q'; 206538c8a9a5SSteve French return buf; 206638c8a9a5SSteve French } 206738c8a9a5SSteve French 206838c8a9a5SSteve French static struct create_durable * 206938c8a9a5SSteve French create_reconnect_durable_buf(struct cifs_fid *fid) 207038c8a9a5SSteve French { 207138c8a9a5SSteve French struct create_durable *buf; 207238c8a9a5SSteve French 207338c8a9a5SSteve French buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL); 207438c8a9a5SSteve French if (!buf) 207538c8a9a5SSteve French return NULL; 207638c8a9a5SSteve French 207738c8a9a5SSteve French buf->ccontext.DataOffset = cpu_to_le16(offsetof 207838c8a9a5SSteve French (struct create_durable, Data)); 207938c8a9a5SSteve French buf->ccontext.DataLength = cpu_to_le32(16); 208038c8a9a5SSteve French buf->ccontext.NameOffset = cpu_to_le16(offsetof 208138c8a9a5SSteve French (struct create_durable, Name)); 208238c8a9a5SSteve French buf->ccontext.NameLength = cpu_to_le16(4); 208338c8a9a5SSteve French buf->Data.Fid.PersistentFileId = fid->persistent_fid; 208438c8a9a5SSteve French buf->Data.Fid.VolatileFileId = fid->volatile_fid; 208538c8a9a5SSteve French /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */ 208638c8a9a5SSteve French buf->Name[0] = 'D'; 208738c8a9a5SSteve French buf->Name[1] = 'H'; 208838c8a9a5SSteve French buf->Name[2] = 'n'; 208938c8a9a5SSteve French buf->Name[3] = 'C'; 209038c8a9a5SSteve French return buf; 209138c8a9a5SSteve French } 209238c8a9a5SSteve French 209338c8a9a5SSteve French static void 209438c8a9a5SSteve French parse_query_id_ctxt(struct create_context *cc, struct smb2_file_all_info *buf) 209538c8a9a5SSteve French { 209638c8a9a5SSteve French struct create_disk_id_rsp *pdisk_id = (struct create_disk_id_rsp *)cc; 209738c8a9a5SSteve French 209838c8a9a5SSteve French cifs_dbg(FYI, "parse query id context 0x%llx 0x%llx\n", 209938c8a9a5SSteve French pdisk_id->DiskFileId, pdisk_id->VolumeId); 210038c8a9a5SSteve French buf->IndexNumber = pdisk_id->DiskFileId; 210138c8a9a5SSteve French } 210238c8a9a5SSteve French 210338c8a9a5SSteve French static void 210438c8a9a5SSteve French parse_posix_ctxt(struct create_context *cc, struct smb2_file_all_info *info, 210538c8a9a5SSteve French struct create_posix_rsp *posix) 210638c8a9a5SSteve French { 210738c8a9a5SSteve French int sid_len; 210838c8a9a5SSteve French u8 *beg = (u8 *)cc + le16_to_cpu(cc->DataOffset); 210938c8a9a5SSteve French u8 *end = beg + le32_to_cpu(cc->DataLength); 211038c8a9a5SSteve French u8 *sid; 211138c8a9a5SSteve French 211238c8a9a5SSteve French memset(posix, 0, sizeof(*posix)); 211338c8a9a5SSteve French 211438c8a9a5SSteve French posix->nlink = le32_to_cpu(*(__le32 *)(beg + 0)); 211538c8a9a5SSteve French posix->reparse_tag = le32_to_cpu(*(__le32 *)(beg + 4)); 211638c8a9a5SSteve French posix->mode = le32_to_cpu(*(__le32 *)(beg + 8)); 211738c8a9a5SSteve French 211838c8a9a5SSteve French sid = beg + 12; 211938c8a9a5SSteve French sid_len = posix_info_sid_size(sid, end); 212038c8a9a5SSteve French if (sid_len < 0) { 212138c8a9a5SSteve French cifs_dbg(VFS, "bad owner sid in posix create response\n"); 212238c8a9a5SSteve French return; 212338c8a9a5SSteve French } 212438c8a9a5SSteve French memcpy(&posix->owner, sid, sid_len); 212538c8a9a5SSteve French 212638c8a9a5SSteve French sid = sid + sid_len; 212738c8a9a5SSteve French sid_len = posix_info_sid_size(sid, end); 212838c8a9a5SSteve French if (sid_len < 0) { 212938c8a9a5SSteve French cifs_dbg(VFS, "bad group sid in posix create response\n"); 213038c8a9a5SSteve French return; 213138c8a9a5SSteve French } 213238c8a9a5SSteve French memcpy(&posix->group, sid, sid_len); 213338c8a9a5SSteve French 213438c8a9a5SSteve French cifs_dbg(FYI, "nlink=%d mode=%o reparse_tag=%x\n", 213538c8a9a5SSteve French posix->nlink, posix->mode, posix->reparse_tag); 213638c8a9a5SSteve French } 213738c8a9a5SSteve French 213838c8a9a5SSteve French void 213938c8a9a5SSteve French smb2_parse_contexts(struct TCP_Server_Info *server, 214038c8a9a5SSteve French struct smb2_create_rsp *rsp, 214138c8a9a5SSteve French unsigned int *epoch, char *lease_key, __u8 *oplock, 214238c8a9a5SSteve French struct smb2_file_all_info *buf, 214338c8a9a5SSteve French struct create_posix_rsp *posix) 214438c8a9a5SSteve French { 214538c8a9a5SSteve French char *data_offset; 214638c8a9a5SSteve French struct create_context *cc; 214738c8a9a5SSteve French unsigned int next; 214838c8a9a5SSteve French unsigned int remaining; 214938c8a9a5SSteve French char *name; 215038c8a9a5SSteve French static const char smb3_create_tag_posix[] = { 215138c8a9a5SSteve French 0x93, 0xAD, 0x25, 0x50, 0x9C, 215238c8a9a5SSteve French 0xB4, 0x11, 0xE7, 0xB4, 0x23, 0x83, 215338c8a9a5SSteve French 0xDE, 0x96, 0x8B, 0xCD, 0x7C 215438c8a9a5SSteve French }; 215538c8a9a5SSteve French 215638c8a9a5SSteve French *oplock = 0; 215738c8a9a5SSteve French data_offset = (char *)rsp + le32_to_cpu(rsp->CreateContextsOffset); 215838c8a9a5SSteve French remaining = le32_to_cpu(rsp->CreateContextsLength); 215938c8a9a5SSteve French cc = (struct create_context *)data_offset; 216038c8a9a5SSteve French 216138c8a9a5SSteve French /* Initialize inode number to 0 in case no valid data in qfid context */ 216238c8a9a5SSteve French if (buf) 216338c8a9a5SSteve French buf->IndexNumber = 0; 216438c8a9a5SSteve French 216538c8a9a5SSteve French while (remaining >= sizeof(struct create_context)) { 216638c8a9a5SSteve French name = le16_to_cpu(cc->NameOffset) + (char *)cc; 216738c8a9a5SSteve French if (le16_to_cpu(cc->NameLength) == 4 && 216838c8a9a5SSteve French strncmp(name, SMB2_CREATE_REQUEST_LEASE, 4) == 0) 216938c8a9a5SSteve French *oplock = server->ops->parse_lease_buf(cc, epoch, 217038c8a9a5SSteve French lease_key); 217138c8a9a5SSteve French else if (buf && (le16_to_cpu(cc->NameLength) == 4) && 217238c8a9a5SSteve French strncmp(name, SMB2_CREATE_QUERY_ON_DISK_ID, 4) == 0) 217338c8a9a5SSteve French parse_query_id_ctxt(cc, buf); 217438c8a9a5SSteve French else if ((le16_to_cpu(cc->NameLength) == 16)) { 217538c8a9a5SSteve French if (posix && 217638c8a9a5SSteve French memcmp(name, smb3_create_tag_posix, 16) == 0) 217738c8a9a5SSteve French parse_posix_ctxt(cc, buf, posix); 217838c8a9a5SSteve French } 217938c8a9a5SSteve French /* else { 218038c8a9a5SSteve French cifs_dbg(FYI, "Context not matched with len %d\n", 218138c8a9a5SSteve French le16_to_cpu(cc->NameLength)); 218238c8a9a5SSteve French cifs_dump_mem("Cctxt name: ", name, 4); 218338c8a9a5SSteve French } */ 218438c8a9a5SSteve French 218538c8a9a5SSteve French next = le32_to_cpu(cc->Next); 218638c8a9a5SSteve French if (!next) 218738c8a9a5SSteve French break; 218838c8a9a5SSteve French remaining -= next; 218938c8a9a5SSteve French cc = (struct create_context *)((char *)cc + next); 219038c8a9a5SSteve French } 219138c8a9a5SSteve French 219238c8a9a5SSteve French if (rsp->OplockLevel != SMB2_OPLOCK_LEVEL_LEASE) 219338c8a9a5SSteve French *oplock = rsp->OplockLevel; 219438c8a9a5SSteve French 219538c8a9a5SSteve French return; 219638c8a9a5SSteve French } 219738c8a9a5SSteve French 219838c8a9a5SSteve French static int 219938c8a9a5SSteve French add_lease_context(struct TCP_Server_Info *server, 220038c8a9a5SSteve French struct smb2_create_req *req, 220138c8a9a5SSteve French struct kvec *iov, 220238c8a9a5SSteve French unsigned int *num_iovec, u8 *lease_key, __u8 *oplock) 220338c8a9a5SSteve French { 220438c8a9a5SSteve French unsigned int num = *num_iovec; 220538c8a9a5SSteve French 220638c8a9a5SSteve French iov[num].iov_base = server->ops->create_lease_buf(lease_key, *oplock); 220738c8a9a5SSteve French if (iov[num].iov_base == NULL) 220838c8a9a5SSteve French return -ENOMEM; 220938c8a9a5SSteve French iov[num].iov_len = server->vals->create_lease_size; 221038c8a9a5SSteve French req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE; 221138c8a9a5SSteve French *num_iovec = num + 1; 221238c8a9a5SSteve French return 0; 221338c8a9a5SSteve French } 221438c8a9a5SSteve French 221538c8a9a5SSteve French static struct create_durable_v2 * 221638c8a9a5SSteve French create_durable_v2_buf(struct cifs_open_parms *oparms) 221738c8a9a5SSteve French { 221838c8a9a5SSteve French struct cifs_fid *pfid = oparms->fid; 221938c8a9a5SSteve French struct create_durable_v2 *buf; 222038c8a9a5SSteve French 222138c8a9a5SSteve French buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL); 222238c8a9a5SSteve French if (!buf) 222338c8a9a5SSteve French return NULL; 222438c8a9a5SSteve French 222538c8a9a5SSteve French buf->ccontext.DataOffset = cpu_to_le16(offsetof 222638c8a9a5SSteve French (struct create_durable_v2, dcontext)); 222738c8a9a5SSteve French buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2)); 222838c8a9a5SSteve French buf->ccontext.NameOffset = cpu_to_le16(offsetof 222938c8a9a5SSteve French (struct create_durable_v2, Name)); 223038c8a9a5SSteve French buf->ccontext.NameLength = cpu_to_le16(4); 223138c8a9a5SSteve French 223238c8a9a5SSteve French /* 223338c8a9a5SSteve French * NB: Handle timeout defaults to 0, which allows server to choose 223438c8a9a5SSteve French * (most servers default to 120 seconds) and most clients default to 0. 223538c8a9a5SSteve French * This can be overridden at mount ("handletimeout=") if the user wants 223638c8a9a5SSteve French * a different persistent (or resilient) handle timeout for all opens 223738c8a9a5SSteve French * opens on a particular SMB3 mount. 223838c8a9a5SSteve French */ 223938c8a9a5SSteve French buf->dcontext.Timeout = cpu_to_le32(oparms->tcon->handle_timeout); 224038c8a9a5SSteve French buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT); 224138c8a9a5SSteve French generate_random_uuid(buf->dcontext.CreateGuid); 224238c8a9a5SSteve French memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16); 224338c8a9a5SSteve French 224438c8a9a5SSteve French /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */ 224538c8a9a5SSteve French buf->Name[0] = 'D'; 224638c8a9a5SSteve French buf->Name[1] = 'H'; 224738c8a9a5SSteve French buf->Name[2] = '2'; 224838c8a9a5SSteve French buf->Name[3] = 'Q'; 224938c8a9a5SSteve French return buf; 225038c8a9a5SSteve French } 225138c8a9a5SSteve French 225238c8a9a5SSteve French static struct create_durable_handle_reconnect_v2 * 225338c8a9a5SSteve French create_reconnect_durable_v2_buf(struct cifs_fid *fid) 225438c8a9a5SSteve French { 225538c8a9a5SSteve French struct create_durable_handle_reconnect_v2 *buf; 225638c8a9a5SSteve French 225738c8a9a5SSteve French buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2), 225838c8a9a5SSteve French GFP_KERNEL); 225938c8a9a5SSteve French if (!buf) 226038c8a9a5SSteve French return NULL; 226138c8a9a5SSteve French 226238c8a9a5SSteve French buf->ccontext.DataOffset = 226338c8a9a5SSteve French cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2, 226438c8a9a5SSteve French dcontext)); 226538c8a9a5SSteve French buf->ccontext.DataLength = 226638c8a9a5SSteve French cpu_to_le32(sizeof(struct durable_reconnect_context_v2)); 226738c8a9a5SSteve French buf->ccontext.NameOffset = 226838c8a9a5SSteve French cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2, 226938c8a9a5SSteve French Name)); 227038c8a9a5SSteve French buf->ccontext.NameLength = cpu_to_le16(4); 227138c8a9a5SSteve French 227238c8a9a5SSteve French buf->dcontext.Fid.PersistentFileId = fid->persistent_fid; 227338c8a9a5SSteve French buf->dcontext.Fid.VolatileFileId = fid->volatile_fid; 227438c8a9a5SSteve French buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT); 227538c8a9a5SSteve French memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16); 227638c8a9a5SSteve French 227738c8a9a5SSteve French /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */ 227838c8a9a5SSteve French buf->Name[0] = 'D'; 227938c8a9a5SSteve French buf->Name[1] = 'H'; 228038c8a9a5SSteve French buf->Name[2] = '2'; 228138c8a9a5SSteve French buf->Name[3] = 'C'; 228238c8a9a5SSteve French return buf; 228338c8a9a5SSteve French } 228438c8a9a5SSteve French 228538c8a9a5SSteve French static int 228638c8a9a5SSteve French add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec, 228738c8a9a5SSteve French struct cifs_open_parms *oparms) 228838c8a9a5SSteve French { 228938c8a9a5SSteve French unsigned int num = *num_iovec; 229038c8a9a5SSteve French 229138c8a9a5SSteve French iov[num].iov_base = create_durable_v2_buf(oparms); 229238c8a9a5SSteve French if (iov[num].iov_base == NULL) 229338c8a9a5SSteve French return -ENOMEM; 229438c8a9a5SSteve French iov[num].iov_len = sizeof(struct create_durable_v2); 229538c8a9a5SSteve French *num_iovec = num + 1; 229638c8a9a5SSteve French return 0; 229738c8a9a5SSteve French } 229838c8a9a5SSteve French 229938c8a9a5SSteve French static int 230038c8a9a5SSteve French add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec, 230138c8a9a5SSteve French struct cifs_open_parms *oparms) 230238c8a9a5SSteve French { 230338c8a9a5SSteve French unsigned int num = *num_iovec; 230438c8a9a5SSteve French 230538c8a9a5SSteve French /* indicate that we don't need to relock the file */ 230638c8a9a5SSteve French oparms->reconnect = false; 230738c8a9a5SSteve French 230838c8a9a5SSteve French iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid); 230938c8a9a5SSteve French if (iov[num].iov_base == NULL) 231038c8a9a5SSteve French return -ENOMEM; 231138c8a9a5SSteve French iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2); 231238c8a9a5SSteve French *num_iovec = num + 1; 231338c8a9a5SSteve French return 0; 231438c8a9a5SSteve French } 231538c8a9a5SSteve French 231638c8a9a5SSteve French static int 231738c8a9a5SSteve French add_durable_context(struct kvec *iov, unsigned int *num_iovec, 231838c8a9a5SSteve French struct cifs_open_parms *oparms, bool use_persistent) 231938c8a9a5SSteve French { 232038c8a9a5SSteve French unsigned int num = *num_iovec; 232138c8a9a5SSteve French 232238c8a9a5SSteve French if (use_persistent) { 232338c8a9a5SSteve French if (oparms->reconnect) 232438c8a9a5SSteve French return add_durable_reconnect_v2_context(iov, num_iovec, 232538c8a9a5SSteve French oparms); 232638c8a9a5SSteve French else 232738c8a9a5SSteve French return add_durable_v2_context(iov, num_iovec, oparms); 232838c8a9a5SSteve French } 232938c8a9a5SSteve French 233038c8a9a5SSteve French if (oparms->reconnect) { 233138c8a9a5SSteve French iov[num].iov_base = create_reconnect_durable_buf(oparms->fid); 233238c8a9a5SSteve French /* indicate that we don't need to relock the file */ 233338c8a9a5SSteve French oparms->reconnect = false; 233438c8a9a5SSteve French } else 233538c8a9a5SSteve French iov[num].iov_base = create_durable_buf(); 233638c8a9a5SSteve French if (iov[num].iov_base == NULL) 233738c8a9a5SSteve French return -ENOMEM; 233838c8a9a5SSteve French iov[num].iov_len = sizeof(struct create_durable); 233938c8a9a5SSteve French *num_iovec = num + 1; 234038c8a9a5SSteve French return 0; 234138c8a9a5SSteve French } 234238c8a9a5SSteve French 234338c8a9a5SSteve French /* See MS-SMB2 2.2.13.2.7 */ 234438c8a9a5SSteve French static struct crt_twarp_ctxt * 234538c8a9a5SSteve French create_twarp_buf(__u64 timewarp) 234638c8a9a5SSteve French { 234738c8a9a5SSteve French struct crt_twarp_ctxt *buf; 234838c8a9a5SSteve French 234938c8a9a5SSteve French buf = kzalloc(sizeof(struct crt_twarp_ctxt), GFP_KERNEL); 235038c8a9a5SSteve French if (!buf) 235138c8a9a5SSteve French return NULL; 235238c8a9a5SSteve French 235338c8a9a5SSteve French buf->ccontext.DataOffset = cpu_to_le16(offsetof 235438c8a9a5SSteve French (struct crt_twarp_ctxt, Timestamp)); 235538c8a9a5SSteve French buf->ccontext.DataLength = cpu_to_le32(8); 235638c8a9a5SSteve French buf->ccontext.NameOffset = cpu_to_le16(offsetof 235738c8a9a5SSteve French (struct crt_twarp_ctxt, Name)); 235838c8a9a5SSteve French buf->ccontext.NameLength = cpu_to_le16(4); 235938c8a9a5SSteve French /* SMB2_CREATE_TIMEWARP_TOKEN is "TWrp" */ 236038c8a9a5SSteve French buf->Name[0] = 'T'; 236138c8a9a5SSteve French buf->Name[1] = 'W'; 236238c8a9a5SSteve French buf->Name[2] = 'r'; 236338c8a9a5SSteve French buf->Name[3] = 'p'; 236438c8a9a5SSteve French buf->Timestamp = cpu_to_le64(timewarp); 236538c8a9a5SSteve French return buf; 236638c8a9a5SSteve French } 236738c8a9a5SSteve French 236838c8a9a5SSteve French /* See MS-SMB2 2.2.13.2.7 */ 236938c8a9a5SSteve French static int 237038c8a9a5SSteve French add_twarp_context(struct kvec *iov, unsigned int *num_iovec, __u64 timewarp) 237138c8a9a5SSteve French { 237238c8a9a5SSteve French unsigned int num = *num_iovec; 237338c8a9a5SSteve French 237438c8a9a5SSteve French iov[num].iov_base = create_twarp_buf(timewarp); 237538c8a9a5SSteve French if (iov[num].iov_base == NULL) 237638c8a9a5SSteve French return -ENOMEM; 237738c8a9a5SSteve French iov[num].iov_len = sizeof(struct crt_twarp_ctxt); 237838c8a9a5SSteve French *num_iovec = num + 1; 237938c8a9a5SSteve French return 0; 238038c8a9a5SSteve French } 238138c8a9a5SSteve French 238238c8a9a5SSteve French /* See See http://technet.microsoft.com/en-us/library/hh509017(v=ws.10).aspx */ 238338c8a9a5SSteve French static void setup_owner_group_sids(char *buf) 238438c8a9a5SSteve French { 238538c8a9a5SSteve French struct owner_group_sids *sids = (struct owner_group_sids *)buf; 238638c8a9a5SSteve French 238738c8a9a5SSteve French /* Populate the user ownership fields S-1-5-88-1 */ 238838c8a9a5SSteve French sids->owner.Revision = 1; 238938c8a9a5SSteve French sids->owner.NumAuth = 3; 239038c8a9a5SSteve French sids->owner.Authority[5] = 5; 239138c8a9a5SSteve French sids->owner.SubAuthorities[0] = cpu_to_le32(88); 239238c8a9a5SSteve French sids->owner.SubAuthorities[1] = cpu_to_le32(1); 239338c8a9a5SSteve French sids->owner.SubAuthorities[2] = cpu_to_le32(current_fsuid().val); 239438c8a9a5SSteve French 239538c8a9a5SSteve French /* Populate the group ownership fields S-1-5-88-2 */ 239638c8a9a5SSteve French sids->group.Revision = 1; 239738c8a9a5SSteve French sids->group.NumAuth = 3; 239838c8a9a5SSteve French sids->group.Authority[5] = 5; 239938c8a9a5SSteve French sids->group.SubAuthorities[0] = cpu_to_le32(88); 240038c8a9a5SSteve French sids->group.SubAuthorities[1] = cpu_to_le32(2); 240138c8a9a5SSteve French sids->group.SubAuthorities[2] = cpu_to_le32(current_fsgid().val); 240238c8a9a5SSteve French 240338c8a9a5SSteve 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); 240438c8a9a5SSteve French } 240538c8a9a5SSteve French 240638c8a9a5SSteve French /* See MS-SMB2 2.2.13.2.2 and MS-DTYP 2.4.6 */ 240738c8a9a5SSteve French static struct crt_sd_ctxt * 240838c8a9a5SSteve French create_sd_buf(umode_t mode, bool set_owner, unsigned int *len) 240938c8a9a5SSteve French { 241038c8a9a5SSteve French struct crt_sd_ctxt *buf; 241138c8a9a5SSteve French __u8 *ptr, *aclptr; 241238c8a9a5SSteve French unsigned int acelen, acl_size, ace_count; 241338c8a9a5SSteve French unsigned int owner_offset = 0; 241438c8a9a5SSteve French unsigned int group_offset = 0; 241538c8a9a5SSteve French struct smb3_acl acl = {}; 241638c8a9a5SSteve French 241738c8a9a5SSteve French *len = round_up(sizeof(struct crt_sd_ctxt) + (sizeof(struct cifs_ace) * 4), 8); 241838c8a9a5SSteve French 241938c8a9a5SSteve French if (set_owner) { 242038c8a9a5SSteve French /* sizeof(struct owner_group_sids) is already multiple of 8 so no need to round */ 242138c8a9a5SSteve French *len += sizeof(struct owner_group_sids); 242238c8a9a5SSteve French } 242338c8a9a5SSteve French 242438c8a9a5SSteve French buf = kzalloc(*len, GFP_KERNEL); 242538c8a9a5SSteve French if (buf == NULL) 242638c8a9a5SSteve French return buf; 242738c8a9a5SSteve French 242838c8a9a5SSteve French ptr = (__u8 *)&buf[1]; 242938c8a9a5SSteve French if (set_owner) { 243038c8a9a5SSteve French /* offset fields are from beginning of security descriptor not of create context */ 243138c8a9a5SSteve French owner_offset = ptr - (__u8 *)&buf->sd; 243238c8a9a5SSteve French buf->sd.OffsetOwner = cpu_to_le32(owner_offset); 243338c8a9a5SSteve French group_offset = owner_offset + offsetof(struct owner_group_sids, group); 243438c8a9a5SSteve French buf->sd.OffsetGroup = cpu_to_le32(group_offset); 243538c8a9a5SSteve French 243638c8a9a5SSteve French setup_owner_group_sids(ptr); 243738c8a9a5SSteve French ptr += sizeof(struct owner_group_sids); 243838c8a9a5SSteve French } else { 243938c8a9a5SSteve French buf->sd.OffsetOwner = 0; 244038c8a9a5SSteve French buf->sd.OffsetGroup = 0; 244138c8a9a5SSteve French } 244238c8a9a5SSteve French 244338c8a9a5SSteve French buf->ccontext.DataOffset = cpu_to_le16(offsetof(struct crt_sd_ctxt, sd)); 244438c8a9a5SSteve French buf->ccontext.NameOffset = cpu_to_le16(offsetof(struct crt_sd_ctxt, Name)); 244538c8a9a5SSteve French buf->ccontext.NameLength = cpu_to_le16(4); 244638c8a9a5SSteve French /* SMB2_CREATE_SD_BUFFER_TOKEN is "SecD" */ 244738c8a9a5SSteve French buf->Name[0] = 'S'; 244838c8a9a5SSteve French buf->Name[1] = 'e'; 244938c8a9a5SSteve French buf->Name[2] = 'c'; 245038c8a9a5SSteve French buf->Name[3] = 'D'; 245138c8a9a5SSteve French buf->sd.Revision = 1; /* Must be one see MS-DTYP 2.4.6 */ 245238c8a9a5SSteve French 245338c8a9a5SSteve French /* 245438c8a9a5SSteve French * ACL is "self relative" ie ACL is stored in contiguous block of memory 245538c8a9a5SSteve French * and "DP" ie the DACL is present 245638c8a9a5SSteve French */ 245738c8a9a5SSteve French buf->sd.Control = cpu_to_le16(ACL_CONTROL_SR | ACL_CONTROL_DP); 245838c8a9a5SSteve French 245938c8a9a5SSteve French /* offset owner, group and Sbz1 and SACL are all zero */ 246038c8a9a5SSteve French buf->sd.OffsetDacl = cpu_to_le32(ptr - (__u8 *)&buf->sd); 246138c8a9a5SSteve French /* Ship the ACL for now. we will copy it into buf later. */ 246238c8a9a5SSteve French aclptr = ptr; 246338c8a9a5SSteve French ptr += sizeof(struct smb3_acl); 246438c8a9a5SSteve French 246538c8a9a5SSteve French /* create one ACE to hold the mode embedded in reserved special SID */ 246638c8a9a5SSteve French acelen = setup_special_mode_ACE((struct cifs_ace *)ptr, (__u64)mode); 246738c8a9a5SSteve French ptr += acelen; 246838c8a9a5SSteve French acl_size = acelen + sizeof(struct smb3_acl); 246938c8a9a5SSteve French ace_count = 1; 247038c8a9a5SSteve French 247138c8a9a5SSteve French if (set_owner) { 247238c8a9a5SSteve French /* we do not need to reallocate buffer to add the two more ACEs. plenty of space */ 247338c8a9a5SSteve French acelen = setup_special_user_owner_ACE((struct cifs_ace *)ptr); 247438c8a9a5SSteve French ptr += acelen; 247538c8a9a5SSteve French acl_size += acelen; 247638c8a9a5SSteve French ace_count += 1; 247738c8a9a5SSteve French } 247838c8a9a5SSteve French 247938c8a9a5SSteve French /* and one more ACE to allow access for authenticated users */ 248038c8a9a5SSteve French acelen = setup_authusers_ACE((struct cifs_ace *)ptr); 248138c8a9a5SSteve French ptr += acelen; 248238c8a9a5SSteve French acl_size += acelen; 248338c8a9a5SSteve French ace_count += 1; 248438c8a9a5SSteve French 248538c8a9a5SSteve French acl.AclRevision = ACL_REVISION; /* See 2.4.4.1 of MS-DTYP */ 248638c8a9a5SSteve French acl.AclSize = cpu_to_le16(acl_size); 248738c8a9a5SSteve French acl.AceCount = cpu_to_le16(ace_count); 248838c8a9a5SSteve French /* acl.Sbz1 and Sbz2 MBZ so are not set here, but initialized above */ 248938c8a9a5SSteve French memcpy(aclptr, &acl, sizeof(struct smb3_acl)); 249038c8a9a5SSteve French 249138c8a9a5SSteve French buf->ccontext.DataLength = cpu_to_le32(ptr - (__u8 *)&buf->sd); 249238c8a9a5SSteve French *len = round_up((unsigned int)(ptr - (__u8 *)buf), 8); 249338c8a9a5SSteve French 249438c8a9a5SSteve French return buf; 249538c8a9a5SSteve French } 249638c8a9a5SSteve French 249738c8a9a5SSteve French static int 249838c8a9a5SSteve French add_sd_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode, bool set_owner) 249938c8a9a5SSteve French { 250038c8a9a5SSteve French unsigned int num = *num_iovec; 250138c8a9a5SSteve French unsigned int len = 0; 250238c8a9a5SSteve French 250338c8a9a5SSteve French iov[num].iov_base = create_sd_buf(mode, set_owner, &len); 250438c8a9a5SSteve French if (iov[num].iov_base == NULL) 250538c8a9a5SSteve French return -ENOMEM; 250638c8a9a5SSteve French iov[num].iov_len = len; 250738c8a9a5SSteve French *num_iovec = num + 1; 250838c8a9a5SSteve French return 0; 250938c8a9a5SSteve French } 251038c8a9a5SSteve French 251138c8a9a5SSteve French static struct crt_query_id_ctxt * 251238c8a9a5SSteve French create_query_id_buf(void) 251338c8a9a5SSteve French { 251438c8a9a5SSteve French struct crt_query_id_ctxt *buf; 251538c8a9a5SSteve French 251638c8a9a5SSteve French buf = kzalloc(sizeof(struct crt_query_id_ctxt), GFP_KERNEL); 251738c8a9a5SSteve French if (!buf) 251838c8a9a5SSteve French return NULL; 251938c8a9a5SSteve French 252038c8a9a5SSteve French buf->ccontext.DataOffset = cpu_to_le16(0); 252138c8a9a5SSteve French buf->ccontext.DataLength = cpu_to_le32(0); 252238c8a9a5SSteve French buf->ccontext.NameOffset = cpu_to_le16(offsetof 252338c8a9a5SSteve French (struct crt_query_id_ctxt, Name)); 252438c8a9a5SSteve French buf->ccontext.NameLength = cpu_to_le16(4); 252538c8a9a5SSteve French /* SMB2_CREATE_QUERY_ON_DISK_ID is "QFid" */ 252638c8a9a5SSteve French buf->Name[0] = 'Q'; 252738c8a9a5SSteve French buf->Name[1] = 'F'; 252838c8a9a5SSteve French buf->Name[2] = 'i'; 252938c8a9a5SSteve French buf->Name[3] = 'd'; 253038c8a9a5SSteve French return buf; 253138c8a9a5SSteve French } 253238c8a9a5SSteve French 253338c8a9a5SSteve French /* See MS-SMB2 2.2.13.2.9 */ 253438c8a9a5SSteve French static int 253538c8a9a5SSteve French add_query_id_context(struct kvec *iov, unsigned int *num_iovec) 253638c8a9a5SSteve French { 253738c8a9a5SSteve French unsigned int num = *num_iovec; 253838c8a9a5SSteve French 253938c8a9a5SSteve French iov[num].iov_base = create_query_id_buf(); 254038c8a9a5SSteve French if (iov[num].iov_base == NULL) 254138c8a9a5SSteve French return -ENOMEM; 254238c8a9a5SSteve French iov[num].iov_len = sizeof(struct crt_query_id_ctxt); 254338c8a9a5SSteve French *num_iovec = num + 1; 254438c8a9a5SSteve French return 0; 254538c8a9a5SSteve French } 254638c8a9a5SSteve French 254738c8a9a5SSteve French static int 254838c8a9a5SSteve French alloc_path_with_tree_prefix(__le16 **out_path, int *out_size, int *out_len, 254938c8a9a5SSteve French const char *treename, const __le16 *path) 255038c8a9a5SSteve French { 255138c8a9a5SSteve French int treename_len, path_len; 255238c8a9a5SSteve French struct nls_table *cp; 255338c8a9a5SSteve French const __le16 sep[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)}; 255438c8a9a5SSteve French 255538c8a9a5SSteve French /* 255638c8a9a5SSteve French * skip leading "\\" 255738c8a9a5SSteve French */ 255838c8a9a5SSteve French treename_len = strlen(treename); 255938c8a9a5SSteve French if (treename_len < 2 || !(treename[0] == '\\' && treename[1] == '\\')) 256038c8a9a5SSteve French return -EINVAL; 256138c8a9a5SSteve French 256238c8a9a5SSteve French treename += 2; 256338c8a9a5SSteve French treename_len -= 2; 256438c8a9a5SSteve French 256538c8a9a5SSteve French path_len = UniStrnlen((wchar_t *)path, PATH_MAX); 256638c8a9a5SSteve French 256738c8a9a5SSteve French /* make room for one path separator only if @path isn't empty */ 256838c8a9a5SSteve French *out_len = treename_len + (path[0] ? 1 : 0) + path_len; 256938c8a9a5SSteve French 257038c8a9a5SSteve French /* 257138c8a9a5SSteve French * final path needs to be 8-byte aligned as specified in 257238c8a9a5SSteve French * MS-SMB2 2.2.13 SMB2 CREATE Request. 257338c8a9a5SSteve French */ 257438c8a9a5SSteve French *out_size = round_up(*out_len * sizeof(__le16), 8); 257538c8a9a5SSteve French *out_path = kzalloc(*out_size + sizeof(__le16) /* null */, GFP_KERNEL); 257638c8a9a5SSteve French if (!*out_path) 257738c8a9a5SSteve French return -ENOMEM; 257838c8a9a5SSteve French 257938c8a9a5SSteve French cp = load_nls_default(); 258038c8a9a5SSteve French cifs_strtoUTF16(*out_path, treename, treename_len, cp); 258138c8a9a5SSteve French 258238c8a9a5SSteve French /* Do not append the separator if the path is empty */ 258338c8a9a5SSteve French if (path[0] != cpu_to_le16(0x0000)) { 258438c8a9a5SSteve French UniStrcat(*out_path, sep); 258538c8a9a5SSteve French UniStrcat(*out_path, path); 258638c8a9a5SSteve French } 258738c8a9a5SSteve French 258838c8a9a5SSteve French unload_nls(cp); 258938c8a9a5SSteve French 259038c8a9a5SSteve French return 0; 259138c8a9a5SSteve French } 259238c8a9a5SSteve French 259338c8a9a5SSteve French int smb311_posix_mkdir(const unsigned int xid, struct inode *inode, 259438c8a9a5SSteve French umode_t mode, struct cifs_tcon *tcon, 259538c8a9a5SSteve French const char *full_path, 259638c8a9a5SSteve French struct cifs_sb_info *cifs_sb) 259738c8a9a5SSteve French { 259838c8a9a5SSteve French struct smb_rqst rqst; 259938c8a9a5SSteve French struct smb2_create_req *req; 260038c8a9a5SSteve French struct smb2_create_rsp *rsp = NULL; 260138c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 260238c8a9a5SSteve French struct kvec iov[3]; /* make sure at least one for each open context */ 260338c8a9a5SSteve French struct kvec rsp_iov = {NULL, 0}; 260438c8a9a5SSteve French int resp_buftype; 260538c8a9a5SSteve French int uni_path_len; 260638c8a9a5SSteve French __le16 *copy_path = NULL; 260738c8a9a5SSteve French int copy_size; 260838c8a9a5SSteve French int rc = 0; 260938c8a9a5SSteve French unsigned int n_iov = 2; 261038c8a9a5SSteve French __u32 file_attributes = 0; 261138c8a9a5SSteve French char *pc_buf = NULL; 261238c8a9a5SSteve French int flags = 0; 261338c8a9a5SSteve French unsigned int total_len; 261438c8a9a5SSteve French __le16 *utf16_path = NULL; 261538c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 261638c8a9a5SSteve French 261738c8a9a5SSteve French cifs_dbg(FYI, "mkdir\n"); 261838c8a9a5SSteve French 261938c8a9a5SSteve French /* resource #1: path allocation */ 262038c8a9a5SSteve French utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); 262138c8a9a5SSteve French if (!utf16_path) 262238c8a9a5SSteve French return -ENOMEM; 262338c8a9a5SSteve French 262438c8a9a5SSteve French if (!ses || !server) { 262538c8a9a5SSteve French rc = -EIO; 262638c8a9a5SSteve French goto err_free_path; 262738c8a9a5SSteve French } 262838c8a9a5SSteve French 262938c8a9a5SSteve French /* resource #2: request */ 263038c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_CREATE, tcon, server, 263138c8a9a5SSteve French (void **) &req, &total_len); 263238c8a9a5SSteve French if (rc) 263338c8a9a5SSteve French goto err_free_path; 263438c8a9a5SSteve French 263538c8a9a5SSteve French 263638c8a9a5SSteve French if (smb3_encryption_required(tcon)) 263738c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 263838c8a9a5SSteve French 263938c8a9a5SSteve French req->ImpersonationLevel = IL_IMPERSONATION; 264038c8a9a5SSteve French req->DesiredAccess = cpu_to_le32(FILE_WRITE_ATTRIBUTES); 264138c8a9a5SSteve French /* File attributes ignored on open (used in create though) */ 264238c8a9a5SSteve French req->FileAttributes = cpu_to_le32(file_attributes); 264338c8a9a5SSteve French req->ShareAccess = FILE_SHARE_ALL_LE; 264438c8a9a5SSteve French req->CreateDisposition = cpu_to_le32(FILE_CREATE); 264538c8a9a5SSteve French req->CreateOptions = cpu_to_le32(CREATE_NOT_FILE); 264638c8a9a5SSteve French 264738c8a9a5SSteve French iov[0].iov_base = (char *)req; 264838c8a9a5SSteve French /* -1 since last byte is buf[0] which is sent below (path) */ 264938c8a9a5SSteve French iov[0].iov_len = total_len - 1; 265038c8a9a5SSteve French 265138c8a9a5SSteve French req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req)); 265238c8a9a5SSteve French 265338c8a9a5SSteve French /* [MS-SMB2] 2.2.13 NameOffset: 265438c8a9a5SSteve French * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of 265538c8a9a5SSteve French * the SMB2 header, the file name includes a prefix that will 265638c8a9a5SSteve French * be processed during DFS name normalization as specified in 265738c8a9a5SSteve French * section 3.3.5.9. Otherwise, the file name is relative to 265838c8a9a5SSteve French * the share that is identified by the TreeId in the SMB2 265938c8a9a5SSteve French * header. 266038c8a9a5SSteve French */ 266138c8a9a5SSteve French if (tcon->share_flags & SHI1005_FLAGS_DFS) { 266238c8a9a5SSteve French int name_len; 266338c8a9a5SSteve French 266438c8a9a5SSteve French req->hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS; 266538c8a9a5SSteve French rc = alloc_path_with_tree_prefix(©_path, ©_size, 266638c8a9a5SSteve French &name_len, 266738c8a9a5SSteve French tcon->tree_name, utf16_path); 266838c8a9a5SSteve French if (rc) 266938c8a9a5SSteve French goto err_free_req; 267038c8a9a5SSteve French 267138c8a9a5SSteve French req->NameLength = cpu_to_le16(name_len * 2); 267238c8a9a5SSteve French uni_path_len = copy_size; 267338c8a9a5SSteve French /* free before overwriting resource */ 267438c8a9a5SSteve French kfree(utf16_path); 267538c8a9a5SSteve French utf16_path = copy_path; 267638c8a9a5SSteve French } else { 267738c8a9a5SSteve French uni_path_len = (2 * UniStrnlen((wchar_t *)utf16_path, PATH_MAX)) + 2; 267838c8a9a5SSteve French /* MUST set path len (NameLength) to 0 opening root of share */ 267938c8a9a5SSteve French req->NameLength = cpu_to_le16(uni_path_len - 2); 268038c8a9a5SSteve French if (uni_path_len % 8 != 0) { 268138c8a9a5SSteve French copy_size = roundup(uni_path_len, 8); 268238c8a9a5SSteve French copy_path = kzalloc(copy_size, GFP_KERNEL); 268338c8a9a5SSteve French if (!copy_path) { 268438c8a9a5SSteve French rc = -ENOMEM; 268538c8a9a5SSteve French goto err_free_req; 268638c8a9a5SSteve French } 268738c8a9a5SSteve French memcpy((char *)copy_path, (const char *)utf16_path, 268838c8a9a5SSteve French uni_path_len); 268938c8a9a5SSteve French uni_path_len = copy_size; 269038c8a9a5SSteve French /* free before overwriting resource */ 269138c8a9a5SSteve French kfree(utf16_path); 269238c8a9a5SSteve French utf16_path = copy_path; 269338c8a9a5SSteve French } 269438c8a9a5SSteve French } 269538c8a9a5SSteve French 269638c8a9a5SSteve French iov[1].iov_len = uni_path_len; 269738c8a9a5SSteve French iov[1].iov_base = utf16_path; 269838c8a9a5SSteve French req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_NONE; 269938c8a9a5SSteve French 270038c8a9a5SSteve French if (tcon->posix_extensions) { 270138c8a9a5SSteve French /* resource #3: posix buf */ 270238c8a9a5SSteve French rc = add_posix_context(iov, &n_iov, mode); 270338c8a9a5SSteve French if (rc) 270438c8a9a5SSteve French goto err_free_req; 270538c8a9a5SSteve French req->CreateContextsOffset = cpu_to_le32( 270638c8a9a5SSteve French sizeof(struct smb2_create_req) + 270738c8a9a5SSteve French iov[1].iov_len); 270838c8a9a5SSteve French pc_buf = iov[n_iov-1].iov_base; 270938c8a9a5SSteve French } 271038c8a9a5SSteve French 271138c8a9a5SSteve French 271238c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 271338c8a9a5SSteve French rqst.rq_iov = iov; 271438c8a9a5SSteve French rqst.rq_nvec = n_iov; 271538c8a9a5SSteve French 271638c8a9a5SSteve French /* no need to inc num_remote_opens because we close it just below */ 271738c8a9a5SSteve French trace_smb3_posix_mkdir_enter(xid, tcon->tid, ses->Suid, full_path, CREATE_NOT_FILE, 271838c8a9a5SSteve French FILE_WRITE_ATTRIBUTES); 271938c8a9a5SSteve French /* resource #4: response buffer */ 272038c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 272138c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 272238c8a9a5SSteve French if (rc) { 272338c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_CREATE_HE); 272438c8a9a5SSteve French trace_smb3_posix_mkdir_err(xid, tcon->tid, ses->Suid, 272538c8a9a5SSteve French CREATE_NOT_FILE, 272638c8a9a5SSteve French FILE_WRITE_ATTRIBUTES, rc); 272738c8a9a5SSteve French goto err_free_rsp_buf; 272838c8a9a5SSteve French } 272938c8a9a5SSteve French 273038c8a9a5SSteve French /* 273138c8a9a5SSteve French * Although unlikely to be possible for rsp to be null and rc not set, 273238c8a9a5SSteve French * adding check below is slightly safer long term (and quiets Coverity 273338c8a9a5SSteve French * warning) 273438c8a9a5SSteve French */ 273538c8a9a5SSteve French rsp = (struct smb2_create_rsp *)rsp_iov.iov_base; 273638c8a9a5SSteve French if (rsp == NULL) { 273738c8a9a5SSteve French rc = -EIO; 273838c8a9a5SSteve French kfree(pc_buf); 273938c8a9a5SSteve French goto err_free_req; 274038c8a9a5SSteve French } 274138c8a9a5SSteve French 274238c8a9a5SSteve French trace_smb3_posix_mkdir_done(xid, rsp->PersistentFileId, tcon->tid, ses->Suid, 274338c8a9a5SSteve French CREATE_NOT_FILE, FILE_WRITE_ATTRIBUTES); 274438c8a9a5SSteve French 274538c8a9a5SSteve French SMB2_close(xid, tcon, rsp->PersistentFileId, rsp->VolatileFileId); 274638c8a9a5SSteve French 274738c8a9a5SSteve French /* Eventually save off posix specific response info and timestaps */ 274838c8a9a5SSteve French 274938c8a9a5SSteve French err_free_rsp_buf: 275038c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp); 275138c8a9a5SSteve French kfree(pc_buf); 275238c8a9a5SSteve French err_free_req: 275338c8a9a5SSteve French cifs_small_buf_release(req); 275438c8a9a5SSteve French err_free_path: 275538c8a9a5SSteve French kfree(utf16_path); 275638c8a9a5SSteve French return rc; 275738c8a9a5SSteve French } 275838c8a9a5SSteve French 275938c8a9a5SSteve French int 276038c8a9a5SSteve French SMB2_open_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server, 276138c8a9a5SSteve French struct smb_rqst *rqst, __u8 *oplock, 276238c8a9a5SSteve French struct cifs_open_parms *oparms, __le16 *path) 276338c8a9a5SSteve French { 276438c8a9a5SSteve French struct smb2_create_req *req; 276538c8a9a5SSteve French unsigned int n_iov = 2; 276638c8a9a5SSteve French __u32 file_attributes = 0; 276738c8a9a5SSteve French int copy_size; 276838c8a9a5SSteve French int uni_path_len; 276938c8a9a5SSteve French unsigned int total_len; 277038c8a9a5SSteve French struct kvec *iov = rqst->rq_iov; 277138c8a9a5SSteve French __le16 *copy_path; 277238c8a9a5SSteve French int rc; 277338c8a9a5SSteve French 277438c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_CREATE, tcon, server, 277538c8a9a5SSteve French (void **) &req, &total_len); 277638c8a9a5SSteve French if (rc) 277738c8a9a5SSteve French return rc; 277838c8a9a5SSteve French 277938c8a9a5SSteve French iov[0].iov_base = (char *)req; 278038c8a9a5SSteve French /* -1 since last byte is buf[0] which is sent below (path) */ 278138c8a9a5SSteve French iov[0].iov_len = total_len - 1; 278238c8a9a5SSteve French 278338c8a9a5SSteve French if (oparms->create_options & CREATE_OPTION_READONLY) 278438c8a9a5SSteve French file_attributes |= ATTR_READONLY; 278538c8a9a5SSteve French if (oparms->create_options & CREATE_OPTION_SPECIAL) 278638c8a9a5SSteve French file_attributes |= ATTR_SYSTEM; 278738c8a9a5SSteve French 278838c8a9a5SSteve French req->ImpersonationLevel = IL_IMPERSONATION; 278938c8a9a5SSteve French req->DesiredAccess = cpu_to_le32(oparms->desired_access); 279038c8a9a5SSteve French /* File attributes ignored on open (used in create though) */ 279138c8a9a5SSteve French req->FileAttributes = cpu_to_le32(file_attributes); 279238c8a9a5SSteve French req->ShareAccess = FILE_SHARE_ALL_LE; 279338c8a9a5SSteve French 279438c8a9a5SSteve French req->CreateDisposition = cpu_to_le32(oparms->disposition); 279538c8a9a5SSteve French req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK); 279638c8a9a5SSteve French req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req)); 279738c8a9a5SSteve French 279838c8a9a5SSteve French /* [MS-SMB2] 2.2.13 NameOffset: 279938c8a9a5SSteve French * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of 280038c8a9a5SSteve French * the SMB2 header, the file name includes a prefix that will 280138c8a9a5SSteve French * be processed during DFS name normalization as specified in 280238c8a9a5SSteve French * section 3.3.5.9. Otherwise, the file name is relative to 280338c8a9a5SSteve French * the share that is identified by the TreeId in the SMB2 280438c8a9a5SSteve French * header. 280538c8a9a5SSteve French */ 280638c8a9a5SSteve French if (tcon->share_flags & SHI1005_FLAGS_DFS) { 280738c8a9a5SSteve French int name_len; 280838c8a9a5SSteve French 280938c8a9a5SSteve French req->hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS; 281038c8a9a5SSteve French rc = alloc_path_with_tree_prefix(©_path, ©_size, 281138c8a9a5SSteve French &name_len, 281238c8a9a5SSteve French tcon->tree_name, path); 281338c8a9a5SSteve French if (rc) 281438c8a9a5SSteve French return rc; 281538c8a9a5SSteve French req->NameLength = cpu_to_le16(name_len * 2); 281638c8a9a5SSteve French uni_path_len = copy_size; 281738c8a9a5SSteve French path = copy_path; 281838c8a9a5SSteve French } else { 281938c8a9a5SSteve French uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2; 282038c8a9a5SSteve French /* MUST set path len (NameLength) to 0 opening root of share */ 282138c8a9a5SSteve French req->NameLength = cpu_to_le16(uni_path_len - 2); 282238c8a9a5SSteve French copy_size = round_up(uni_path_len, 8); 282338c8a9a5SSteve French copy_path = kzalloc(copy_size, GFP_KERNEL); 282438c8a9a5SSteve French if (!copy_path) 282538c8a9a5SSteve French return -ENOMEM; 282638c8a9a5SSteve French memcpy((char *)copy_path, (const char *)path, 282738c8a9a5SSteve French uni_path_len); 282838c8a9a5SSteve French uni_path_len = copy_size; 282938c8a9a5SSteve French path = copy_path; 283038c8a9a5SSteve French } 283138c8a9a5SSteve French 283238c8a9a5SSteve French iov[1].iov_len = uni_path_len; 283338c8a9a5SSteve French iov[1].iov_base = path; 283438c8a9a5SSteve French 283538c8a9a5SSteve French if ((!server->oplocks) || (tcon->no_lease)) 283638c8a9a5SSteve French *oplock = SMB2_OPLOCK_LEVEL_NONE; 283738c8a9a5SSteve French 283838c8a9a5SSteve French if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) || 283938c8a9a5SSteve French *oplock == SMB2_OPLOCK_LEVEL_NONE) 284038c8a9a5SSteve French req->RequestedOplockLevel = *oplock; 284138c8a9a5SSteve French else if (!(server->capabilities & SMB2_GLOBAL_CAP_DIRECTORY_LEASING) && 284238c8a9a5SSteve French (oparms->create_options & CREATE_NOT_FILE)) 284338c8a9a5SSteve French req->RequestedOplockLevel = *oplock; /* no srv lease support */ 284438c8a9a5SSteve French else { 284538c8a9a5SSteve French rc = add_lease_context(server, req, iov, &n_iov, 284638c8a9a5SSteve French oparms->fid->lease_key, oplock); 284738c8a9a5SSteve French if (rc) 284838c8a9a5SSteve French return rc; 284938c8a9a5SSteve French } 285038c8a9a5SSteve French 285138c8a9a5SSteve French if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) { 285238c8a9a5SSteve French rc = add_durable_context(iov, &n_iov, oparms, 285338c8a9a5SSteve French tcon->use_persistent); 285438c8a9a5SSteve French if (rc) 285538c8a9a5SSteve French return rc; 285638c8a9a5SSteve French } 285738c8a9a5SSteve French 285838c8a9a5SSteve French if (tcon->posix_extensions) { 285938c8a9a5SSteve French rc = add_posix_context(iov, &n_iov, oparms->mode); 286038c8a9a5SSteve French if (rc) 286138c8a9a5SSteve French return rc; 286238c8a9a5SSteve French } 286338c8a9a5SSteve French 286438c8a9a5SSteve French if (tcon->snapshot_time) { 286538c8a9a5SSteve French cifs_dbg(FYI, "adding snapshot context\n"); 286638c8a9a5SSteve French rc = add_twarp_context(iov, &n_iov, tcon->snapshot_time); 286738c8a9a5SSteve French if (rc) 286838c8a9a5SSteve French return rc; 286938c8a9a5SSteve French } 287038c8a9a5SSteve French 287138c8a9a5SSteve French if ((oparms->disposition != FILE_OPEN) && (oparms->cifs_sb)) { 287238c8a9a5SSteve French bool set_mode; 287338c8a9a5SSteve French bool set_owner; 287438c8a9a5SSteve French 287538c8a9a5SSteve French if ((oparms->cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) && 287638c8a9a5SSteve French (oparms->mode != ACL_NO_MODE)) 287738c8a9a5SSteve French set_mode = true; 287838c8a9a5SSteve French else { 287938c8a9a5SSteve French set_mode = false; 288038c8a9a5SSteve French oparms->mode = ACL_NO_MODE; 288138c8a9a5SSteve French } 288238c8a9a5SSteve French 288338c8a9a5SSteve French if (oparms->cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UID_FROM_ACL) 288438c8a9a5SSteve French set_owner = true; 288538c8a9a5SSteve French else 288638c8a9a5SSteve French set_owner = false; 288738c8a9a5SSteve French 288838c8a9a5SSteve French if (set_owner | set_mode) { 288938c8a9a5SSteve French cifs_dbg(FYI, "add sd with mode 0x%x\n", oparms->mode); 289038c8a9a5SSteve French rc = add_sd_context(iov, &n_iov, oparms->mode, set_owner); 289138c8a9a5SSteve French if (rc) 289238c8a9a5SSteve French return rc; 289338c8a9a5SSteve French } 289438c8a9a5SSteve French } 289538c8a9a5SSteve French 289638c8a9a5SSteve French add_query_id_context(iov, &n_iov); 289738c8a9a5SSteve French 289838c8a9a5SSteve French if (n_iov > 2) { 289938c8a9a5SSteve French /* 290038c8a9a5SSteve French * We have create contexts behind iov[1] (the file 290138c8a9a5SSteve French * name), point at them from the main create request 290238c8a9a5SSteve French */ 290338c8a9a5SSteve French req->CreateContextsOffset = cpu_to_le32( 290438c8a9a5SSteve French sizeof(struct smb2_create_req) + 290538c8a9a5SSteve French iov[1].iov_len); 290638c8a9a5SSteve French req->CreateContextsLength = 0; 290738c8a9a5SSteve French 290838c8a9a5SSteve French for (unsigned int i = 2; i < (n_iov-1); i++) { 290938c8a9a5SSteve French struct kvec *v = &iov[i]; 291038c8a9a5SSteve French size_t len = v->iov_len; 291138c8a9a5SSteve French struct create_context *cctx = 291238c8a9a5SSteve French (struct create_context *)v->iov_base; 291338c8a9a5SSteve French 291438c8a9a5SSteve French cctx->Next = cpu_to_le32(len); 291538c8a9a5SSteve French le32_add_cpu(&req->CreateContextsLength, len); 291638c8a9a5SSteve French } 291738c8a9a5SSteve French le32_add_cpu(&req->CreateContextsLength, 291838c8a9a5SSteve French iov[n_iov-1].iov_len); 291938c8a9a5SSteve French } 292038c8a9a5SSteve French 292138c8a9a5SSteve French rqst->rq_nvec = n_iov; 292238c8a9a5SSteve French return 0; 292338c8a9a5SSteve French } 292438c8a9a5SSteve French 292538c8a9a5SSteve French /* rq_iov[0] is the request and is released by cifs_small_buf_release(). 292638c8a9a5SSteve French * All other vectors are freed by kfree(). 292738c8a9a5SSteve French */ 292838c8a9a5SSteve French void 292938c8a9a5SSteve French SMB2_open_free(struct smb_rqst *rqst) 293038c8a9a5SSteve French { 293138c8a9a5SSteve French int i; 293238c8a9a5SSteve French 293338c8a9a5SSteve French if (rqst && rqst->rq_iov) { 293438c8a9a5SSteve French cifs_small_buf_release(rqst->rq_iov[0].iov_base); 293538c8a9a5SSteve French for (i = 1; i < rqst->rq_nvec; i++) 293638c8a9a5SSteve French if (rqst->rq_iov[i].iov_base != smb2_padding) 293738c8a9a5SSteve French kfree(rqst->rq_iov[i].iov_base); 293838c8a9a5SSteve French } 293938c8a9a5SSteve French } 294038c8a9a5SSteve French 294138c8a9a5SSteve French int 294238c8a9a5SSteve French SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path, 294338c8a9a5SSteve French __u8 *oplock, struct smb2_file_all_info *buf, 294438c8a9a5SSteve French struct create_posix_rsp *posix, 294538c8a9a5SSteve French struct kvec *err_iov, int *buftype) 294638c8a9a5SSteve French { 294738c8a9a5SSteve French struct smb_rqst rqst; 294838c8a9a5SSteve French struct smb2_create_rsp *rsp = NULL; 294938c8a9a5SSteve French struct cifs_tcon *tcon = oparms->tcon; 295038c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 295138c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 295238c8a9a5SSteve French struct kvec iov[SMB2_CREATE_IOV_SIZE]; 295338c8a9a5SSteve French struct kvec rsp_iov = {NULL, 0}; 295438c8a9a5SSteve French int resp_buftype = CIFS_NO_BUFFER; 295538c8a9a5SSteve French int rc = 0; 295638c8a9a5SSteve French int flags = 0; 295738c8a9a5SSteve French 295838c8a9a5SSteve French cifs_dbg(FYI, "create/open\n"); 295938c8a9a5SSteve French if (!ses || !server) 296038c8a9a5SSteve French return -EIO; 296138c8a9a5SSteve French 296238c8a9a5SSteve French if (smb3_encryption_required(tcon)) 296338c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 296438c8a9a5SSteve French 296538c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 296638c8a9a5SSteve French memset(&iov, 0, sizeof(iov)); 296738c8a9a5SSteve French rqst.rq_iov = iov; 296838c8a9a5SSteve French rqst.rq_nvec = SMB2_CREATE_IOV_SIZE; 296938c8a9a5SSteve French 297038c8a9a5SSteve French rc = SMB2_open_init(tcon, server, 297138c8a9a5SSteve French &rqst, oplock, oparms, path); 297238c8a9a5SSteve French if (rc) 297338c8a9a5SSteve French goto creat_exit; 297438c8a9a5SSteve French 297538c8a9a5SSteve French trace_smb3_open_enter(xid, tcon->tid, tcon->ses->Suid, oparms->path, 297638c8a9a5SSteve French oparms->create_options, oparms->desired_access); 297738c8a9a5SSteve French 297838c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 297938c8a9a5SSteve French &rqst, &resp_buftype, flags, 298038c8a9a5SSteve French &rsp_iov); 298138c8a9a5SSteve French rsp = (struct smb2_create_rsp *)rsp_iov.iov_base; 298238c8a9a5SSteve French 298338c8a9a5SSteve French if (rc != 0) { 298438c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_CREATE_HE); 298538c8a9a5SSteve French if (err_iov && rsp) { 298638c8a9a5SSteve French *err_iov = rsp_iov; 298738c8a9a5SSteve French *buftype = resp_buftype; 298838c8a9a5SSteve French resp_buftype = CIFS_NO_BUFFER; 298938c8a9a5SSteve French rsp = NULL; 299038c8a9a5SSteve French } 299138c8a9a5SSteve French trace_smb3_open_err(xid, tcon->tid, ses->Suid, 299238c8a9a5SSteve French oparms->create_options, oparms->desired_access, rc); 299338c8a9a5SSteve French if (rc == -EREMCHG) { 299438c8a9a5SSteve French pr_warn_once("server share %s deleted\n", 299538c8a9a5SSteve French tcon->tree_name); 299638c8a9a5SSteve French tcon->need_reconnect = true; 299738c8a9a5SSteve French } 299838c8a9a5SSteve French goto creat_exit; 299938c8a9a5SSteve French } else if (rsp == NULL) /* unlikely to happen, but safer to check */ 300038c8a9a5SSteve French goto creat_exit; 300138c8a9a5SSteve French else 300238c8a9a5SSteve French trace_smb3_open_done(xid, rsp->PersistentFileId, tcon->tid, ses->Suid, 300338c8a9a5SSteve French oparms->create_options, oparms->desired_access); 300438c8a9a5SSteve French 300538c8a9a5SSteve French atomic_inc(&tcon->num_remote_opens); 300638c8a9a5SSteve French oparms->fid->persistent_fid = rsp->PersistentFileId; 300738c8a9a5SSteve French oparms->fid->volatile_fid = rsp->VolatileFileId; 300838c8a9a5SSteve French oparms->fid->access = oparms->desired_access; 300938c8a9a5SSteve French #ifdef CONFIG_CIFS_DEBUG2 301038c8a9a5SSteve French oparms->fid->mid = le64_to_cpu(rsp->hdr.MessageId); 301138c8a9a5SSteve French #endif /* CIFS_DEBUG2 */ 301238c8a9a5SSteve French 301338c8a9a5SSteve French if (buf) { 301438c8a9a5SSteve French buf->CreationTime = rsp->CreationTime; 301538c8a9a5SSteve French buf->LastAccessTime = rsp->LastAccessTime; 301638c8a9a5SSteve French buf->LastWriteTime = rsp->LastWriteTime; 301738c8a9a5SSteve French buf->ChangeTime = rsp->ChangeTime; 301838c8a9a5SSteve French buf->AllocationSize = rsp->AllocationSize; 301938c8a9a5SSteve French buf->EndOfFile = rsp->EndofFile; 302038c8a9a5SSteve French buf->Attributes = rsp->FileAttributes; 302138c8a9a5SSteve French buf->NumberOfLinks = cpu_to_le32(1); 302238c8a9a5SSteve French buf->DeletePending = 0; 302338c8a9a5SSteve French } 302438c8a9a5SSteve French 302538c8a9a5SSteve French 302638c8a9a5SSteve French smb2_parse_contexts(server, rsp, &oparms->fid->epoch, 302738c8a9a5SSteve French oparms->fid->lease_key, oplock, buf, posix); 302838c8a9a5SSteve French creat_exit: 302938c8a9a5SSteve French SMB2_open_free(&rqst); 303038c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp); 303138c8a9a5SSteve French return rc; 303238c8a9a5SSteve French } 303338c8a9a5SSteve French 303438c8a9a5SSteve French int 303538c8a9a5SSteve French SMB2_ioctl_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server, 303638c8a9a5SSteve French struct smb_rqst *rqst, 303738c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, u32 opcode, 303838c8a9a5SSteve French char *in_data, u32 indatalen, 303938c8a9a5SSteve French __u32 max_response_size) 304038c8a9a5SSteve French { 304138c8a9a5SSteve French struct smb2_ioctl_req *req; 304238c8a9a5SSteve French struct kvec *iov = rqst->rq_iov; 304338c8a9a5SSteve French unsigned int total_len; 304438c8a9a5SSteve French int rc; 304538c8a9a5SSteve French char *in_data_buf; 304638c8a9a5SSteve French 304738c8a9a5SSteve French rc = smb2_ioctl_req_init(opcode, tcon, server, 304838c8a9a5SSteve French (void **) &req, &total_len); 304938c8a9a5SSteve French if (rc) 305038c8a9a5SSteve French return rc; 305138c8a9a5SSteve French 305238c8a9a5SSteve French if (indatalen) { 305338c8a9a5SSteve French /* 305438c8a9a5SSteve French * indatalen is usually small at a couple of bytes max, so 305538c8a9a5SSteve French * just allocate through generic pool 305638c8a9a5SSteve French */ 305738c8a9a5SSteve French in_data_buf = kmemdup(in_data, indatalen, GFP_NOFS); 305838c8a9a5SSteve French if (!in_data_buf) { 305938c8a9a5SSteve French cifs_small_buf_release(req); 306038c8a9a5SSteve French return -ENOMEM; 306138c8a9a5SSteve French } 306238c8a9a5SSteve French } 306338c8a9a5SSteve French 306438c8a9a5SSteve French req->CtlCode = cpu_to_le32(opcode); 306538c8a9a5SSteve French req->PersistentFileId = persistent_fid; 306638c8a9a5SSteve French req->VolatileFileId = volatile_fid; 306738c8a9a5SSteve French 306838c8a9a5SSteve French iov[0].iov_base = (char *)req; 306938c8a9a5SSteve French /* 307038c8a9a5SSteve French * If no input data, the size of ioctl struct in 307138c8a9a5SSteve French * protocol spec still includes a 1 byte data buffer, 307238c8a9a5SSteve French * but if input data passed to ioctl, we do not 307338c8a9a5SSteve French * want to double count this, so we do not send 307438c8a9a5SSteve French * the dummy one byte of data in iovec[0] if sending 307538c8a9a5SSteve French * input data (in iovec[1]). 307638c8a9a5SSteve French */ 307738c8a9a5SSteve French if (indatalen) { 307838c8a9a5SSteve French req->InputCount = cpu_to_le32(indatalen); 307938c8a9a5SSteve French /* do not set InputOffset if no input data */ 308038c8a9a5SSteve French req->InputOffset = 308138c8a9a5SSteve French cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer)); 308238c8a9a5SSteve French rqst->rq_nvec = 2; 308338c8a9a5SSteve French iov[0].iov_len = total_len - 1; 308438c8a9a5SSteve French iov[1].iov_base = in_data_buf; 308538c8a9a5SSteve French iov[1].iov_len = indatalen; 308638c8a9a5SSteve French } else { 308738c8a9a5SSteve French rqst->rq_nvec = 1; 308838c8a9a5SSteve French iov[0].iov_len = total_len; 308938c8a9a5SSteve French } 309038c8a9a5SSteve French 309138c8a9a5SSteve French req->OutputOffset = 0; 309238c8a9a5SSteve French req->OutputCount = 0; /* MBZ */ 309338c8a9a5SSteve French 309438c8a9a5SSteve French /* 309538c8a9a5SSteve French * In most cases max_response_size is set to 16K (CIFSMaxBufSize) 309638c8a9a5SSteve French * We Could increase default MaxOutputResponse, but that could require 309738c8a9a5SSteve French * more credits. Windows typically sets this smaller, but for some 309838c8a9a5SSteve French * ioctls it may be useful to allow server to send more. No point 309938c8a9a5SSteve French * limiting what the server can send as long as fits in one credit 310038c8a9a5SSteve French * We can not handle more than CIFS_MAX_BUF_SIZE yet but may want 310138c8a9a5SSteve French * to increase this limit up in the future. 310238c8a9a5SSteve French * Note that for snapshot queries that servers like Azure expect that 310338c8a9a5SSteve French * the first query be minimal size (and just used to get the number/size 310438c8a9a5SSteve French * of previous versions) so response size must be specified as EXACTLY 310538c8a9a5SSteve French * sizeof(struct snapshot_array) which is 16 when rounded up to multiple 310638c8a9a5SSteve French * of eight bytes. Currently that is the only case where we set max 310738c8a9a5SSteve French * response size smaller. 310838c8a9a5SSteve French */ 310938c8a9a5SSteve French req->MaxOutputResponse = cpu_to_le32(max_response_size); 311038c8a9a5SSteve French req->hdr.CreditCharge = 311138c8a9a5SSteve French cpu_to_le16(DIV_ROUND_UP(max(indatalen, max_response_size), 311238c8a9a5SSteve French SMB2_MAX_BUFFER_SIZE)); 311338c8a9a5SSteve French /* always an FSCTL (for now) */ 311438c8a9a5SSteve French req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL); 311538c8a9a5SSteve French 311638c8a9a5SSteve French /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */ 311738c8a9a5SSteve French if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO) 311838c8a9a5SSteve French req->hdr.Flags |= SMB2_FLAGS_SIGNED; 311938c8a9a5SSteve French 312038c8a9a5SSteve French return 0; 312138c8a9a5SSteve French } 312238c8a9a5SSteve French 312338c8a9a5SSteve French void 312438c8a9a5SSteve French SMB2_ioctl_free(struct smb_rqst *rqst) 312538c8a9a5SSteve French { 312638c8a9a5SSteve French int i; 312738c8a9a5SSteve French if (rqst && rqst->rq_iov) { 312838c8a9a5SSteve French cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */ 312938c8a9a5SSteve French for (i = 1; i < rqst->rq_nvec; i++) 313038c8a9a5SSteve French if (rqst->rq_iov[i].iov_base != smb2_padding) 313138c8a9a5SSteve French kfree(rqst->rq_iov[i].iov_base); 313238c8a9a5SSteve French } 313338c8a9a5SSteve French } 313438c8a9a5SSteve French 313538c8a9a5SSteve French 313638c8a9a5SSteve French /* 313738c8a9a5SSteve French * SMB2 IOCTL is used for both IOCTLs and FSCTLs 313838c8a9a5SSteve French */ 313938c8a9a5SSteve French int 314038c8a9a5SSteve French SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, 314138c8a9a5SSteve French u64 volatile_fid, u32 opcode, char *in_data, u32 indatalen, 314238c8a9a5SSteve French u32 max_out_data_len, char **out_data, 314338c8a9a5SSteve French u32 *plen /* returned data len */) 314438c8a9a5SSteve French { 314538c8a9a5SSteve French struct smb_rqst rqst; 314638c8a9a5SSteve French struct smb2_ioctl_rsp *rsp = NULL; 314738c8a9a5SSteve French struct cifs_ses *ses; 314838c8a9a5SSteve French struct TCP_Server_Info *server; 314938c8a9a5SSteve French struct kvec iov[SMB2_IOCTL_IOV_SIZE]; 315038c8a9a5SSteve French struct kvec rsp_iov = {NULL, 0}; 315138c8a9a5SSteve French int resp_buftype = CIFS_NO_BUFFER; 315238c8a9a5SSteve French int rc = 0; 315338c8a9a5SSteve French int flags = 0; 315438c8a9a5SSteve French 315538c8a9a5SSteve French cifs_dbg(FYI, "SMB2 IOCTL\n"); 315638c8a9a5SSteve French 315738c8a9a5SSteve French if (out_data != NULL) 315838c8a9a5SSteve French *out_data = NULL; 315938c8a9a5SSteve French 316038c8a9a5SSteve French /* zero out returned data len, in case of error */ 316138c8a9a5SSteve French if (plen) 316238c8a9a5SSteve French *plen = 0; 316338c8a9a5SSteve French 316438c8a9a5SSteve French if (!tcon) 316538c8a9a5SSteve French return -EIO; 316638c8a9a5SSteve French 316738c8a9a5SSteve French ses = tcon->ses; 316838c8a9a5SSteve French if (!ses) 316938c8a9a5SSteve French return -EIO; 317038c8a9a5SSteve French 317138c8a9a5SSteve French server = cifs_pick_channel(ses); 317238c8a9a5SSteve French if (!server) 317338c8a9a5SSteve French return -EIO; 317438c8a9a5SSteve French 317538c8a9a5SSteve French if (smb3_encryption_required(tcon)) 317638c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 317738c8a9a5SSteve French 317838c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 317938c8a9a5SSteve French memset(&iov, 0, sizeof(iov)); 318038c8a9a5SSteve French rqst.rq_iov = iov; 318138c8a9a5SSteve French rqst.rq_nvec = SMB2_IOCTL_IOV_SIZE; 318238c8a9a5SSteve French 318338c8a9a5SSteve French rc = SMB2_ioctl_init(tcon, server, 318438c8a9a5SSteve French &rqst, persistent_fid, volatile_fid, opcode, 318538c8a9a5SSteve French in_data, indatalen, max_out_data_len); 318638c8a9a5SSteve French if (rc) 318738c8a9a5SSteve French goto ioctl_exit; 318838c8a9a5SSteve French 318938c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 319038c8a9a5SSteve French &rqst, &resp_buftype, flags, 319138c8a9a5SSteve French &rsp_iov); 319238c8a9a5SSteve French rsp = (struct smb2_ioctl_rsp *)rsp_iov.iov_base; 319338c8a9a5SSteve French 319438c8a9a5SSteve French if (rc != 0) 319538c8a9a5SSteve French trace_smb3_fsctl_err(xid, persistent_fid, tcon->tid, 319638c8a9a5SSteve French ses->Suid, 0, opcode, rc); 319738c8a9a5SSteve French 319838c8a9a5SSteve French if ((rc != 0) && (rc != -EINVAL) && (rc != -E2BIG)) { 319938c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE); 320038c8a9a5SSteve French goto ioctl_exit; 320138c8a9a5SSteve French } else if (rc == -EINVAL) { 320238c8a9a5SSteve French if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) && 320338c8a9a5SSteve French (opcode != FSCTL_SRV_COPYCHUNK)) { 320438c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE); 320538c8a9a5SSteve French goto ioctl_exit; 320638c8a9a5SSteve French } 320738c8a9a5SSteve French } else if (rc == -E2BIG) { 320838c8a9a5SSteve French if (opcode != FSCTL_QUERY_ALLOCATED_RANGES) { 320938c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE); 321038c8a9a5SSteve French goto ioctl_exit; 321138c8a9a5SSteve French } 321238c8a9a5SSteve French } 321338c8a9a5SSteve French 321438c8a9a5SSteve French /* check if caller wants to look at return data or just return rc */ 321538c8a9a5SSteve French if ((plen == NULL) || (out_data == NULL)) 321638c8a9a5SSteve French goto ioctl_exit; 321738c8a9a5SSteve French 321838c8a9a5SSteve French /* 321938c8a9a5SSteve French * Although unlikely to be possible for rsp to be null and rc not set, 322038c8a9a5SSteve French * adding check below is slightly safer long term (and quiets Coverity 322138c8a9a5SSteve French * warning) 322238c8a9a5SSteve French */ 322338c8a9a5SSteve French if (rsp == NULL) { 322438c8a9a5SSteve French rc = -EIO; 322538c8a9a5SSteve French goto ioctl_exit; 322638c8a9a5SSteve French } 322738c8a9a5SSteve French 322838c8a9a5SSteve French *plen = le32_to_cpu(rsp->OutputCount); 322938c8a9a5SSteve French 323038c8a9a5SSteve French /* We check for obvious errors in the output buffer length and offset */ 323138c8a9a5SSteve French if (*plen == 0) 323238c8a9a5SSteve French goto ioctl_exit; /* server returned no data */ 323338c8a9a5SSteve French else if (*plen > rsp_iov.iov_len || *plen > 0xFF00) { 323438c8a9a5SSteve French cifs_tcon_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen); 323538c8a9a5SSteve French *plen = 0; 323638c8a9a5SSteve French rc = -EIO; 323738c8a9a5SSteve French goto ioctl_exit; 323838c8a9a5SSteve French } 323938c8a9a5SSteve French 324038c8a9a5SSteve French if (rsp_iov.iov_len - *plen < le32_to_cpu(rsp->OutputOffset)) { 324138c8a9a5SSteve French cifs_tcon_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen, 324238c8a9a5SSteve French le32_to_cpu(rsp->OutputOffset)); 324338c8a9a5SSteve French *plen = 0; 324438c8a9a5SSteve French rc = -EIO; 324538c8a9a5SSteve French goto ioctl_exit; 324638c8a9a5SSteve French } 324738c8a9a5SSteve French 324838c8a9a5SSteve French *out_data = kmemdup((char *)rsp + le32_to_cpu(rsp->OutputOffset), 324938c8a9a5SSteve French *plen, GFP_KERNEL); 325038c8a9a5SSteve French if (*out_data == NULL) { 325138c8a9a5SSteve French rc = -ENOMEM; 325238c8a9a5SSteve French goto ioctl_exit; 325338c8a9a5SSteve French } 325438c8a9a5SSteve French 325538c8a9a5SSteve French ioctl_exit: 325638c8a9a5SSteve French SMB2_ioctl_free(&rqst); 325738c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp); 325838c8a9a5SSteve French return rc; 325938c8a9a5SSteve French } 326038c8a9a5SSteve French 326138c8a9a5SSteve French /* 326238c8a9a5SSteve French * Individual callers to ioctl worker function follow 326338c8a9a5SSteve French */ 326438c8a9a5SSteve French 326538c8a9a5SSteve French int 326638c8a9a5SSteve French SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, 326738c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid) 326838c8a9a5SSteve French { 326938c8a9a5SSteve French int rc; 327038c8a9a5SSteve French struct compress_ioctl fsctl_input; 327138c8a9a5SSteve French char *ret_data = NULL; 327238c8a9a5SSteve French 327338c8a9a5SSteve French fsctl_input.CompressionState = 327438c8a9a5SSteve French cpu_to_le16(COMPRESSION_FORMAT_DEFAULT); 327538c8a9a5SSteve French 327638c8a9a5SSteve French rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid, 327738c8a9a5SSteve French FSCTL_SET_COMPRESSION, 327838c8a9a5SSteve French (char *)&fsctl_input /* data input */, 327938c8a9a5SSteve French 2 /* in data len */, CIFSMaxBufSize /* max out data */, 328038c8a9a5SSteve French &ret_data /* out data */, NULL); 328138c8a9a5SSteve French 328238c8a9a5SSteve French cifs_dbg(FYI, "set compression rc %d\n", rc); 328338c8a9a5SSteve French 328438c8a9a5SSteve French return rc; 328538c8a9a5SSteve French } 328638c8a9a5SSteve French 328738c8a9a5SSteve French int 328838c8a9a5SSteve French SMB2_close_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server, 328938c8a9a5SSteve French struct smb_rqst *rqst, 329038c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, bool query_attrs) 329138c8a9a5SSteve French { 329238c8a9a5SSteve French struct smb2_close_req *req; 329338c8a9a5SSteve French struct kvec *iov = rqst->rq_iov; 329438c8a9a5SSteve French unsigned int total_len; 329538c8a9a5SSteve French int rc; 329638c8a9a5SSteve French 329738c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_CLOSE, tcon, server, 329838c8a9a5SSteve French (void **) &req, &total_len); 329938c8a9a5SSteve French if (rc) 330038c8a9a5SSteve French return rc; 330138c8a9a5SSteve French 330238c8a9a5SSteve French req->PersistentFileId = persistent_fid; 330338c8a9a5SSteve French req->VolatileFileId = volatile_fid; 330438c8a9a5SSteve French if (query_attrs) 330538c8a9a5SSteve French req->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB; 330638c8a9a5SSteve French else 330738c8a9a5SSteve French req->Flags = 0; 330838c8a9a5SSteve French iov[0].iov_base = (char *)req; 330938c8a9a5SSteve French iov[0].iov_len = total_len; 331038c8a9a5SSteve French 331138c8a9a5SSteve French return 0; 331238c8a9a5SSteve French } 331338c8a9a5SSteve French 331438c8a9a5SSteve French void 331538c8a9a5SSteve French SMB2_close_free(struct smb_rqst *rqst) 331638c8a9a5SSteve French { 331738c8a9a5SSteve French if (rqst && rqst->rq_iov) 331838c8a9a5SSteve French cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */ 331938c8a9a5SSteve French } 332038c8a9a5SSteve French 332138c8a9a5SSteve French int 332238c8a9a5SSteve French __SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, 332338c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, 332438c8a9a5SSteve French struct smb2_file_network_open_info *pbuf) 332538c8a9a5SSteve French { 332638c8a9a5SSteve French struct smb_rqst rqst; 332738c8a9a5SSteve French struct smb2_close_rsp *rsp = NULL; 332838c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 332938c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 333038c8a9a5SSteve French struct kvec iov[1]; 333138c8a9a5SSteve French struct kvec rsp_iov; 333238c8a9a5SSteve French int resp_buftype = CIFS_NO_BUFFER; 333338c8a9a5SSteve French int rc = 0; 333438c8a9a5SSteve French int flags = 0; 333538c8a9a5SSteve French bool query_attrs = false; 333638c8a9a5SSteve French 333738c8a9a5SSteve French cifs_dbg(FYI, "Close\n"); 333838c8a9a5SSteve French 333938c8a9a5SSteve French if (!ses || !server) 334038c8a9a5SSteve French return -EIO; 334138c8a9a5SSteve French 334238c8a9a5SSteve French if (smb3_encryption_required(tcon)) 334338c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 334438c8a9a5SSteve French 334538c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 334638c8a9a5SSteve French memset(&iov, 0, sizeof(iov)); 334738c8a9a5SSteve French rqst.rq_iov = iov; 334838c8a9a5SSteve French rqst.rq_nvec = 1; 334938c8a9a5SSteve French 335038c8a9a5SSteve French /* check if need to ask server to return timestamps in close response */ 335138c8a9a5SSteve French if (pbuf) 335238c8a9a5SSteve French query_attrs = true; 335338c8a9a5SSteve French 335438c8a9a5SSteve French trace_smb3_close_enter(xid, persistent_fid, tcon->tid, ses->Suid); 335538c8a9a5SSteve French rc = SMB2_close_init(tcon, server, 335638c8a9a5SSteve French &rqst, persistent_fid, volatile_fid, 335738c8a9a5SSteve French query_attrs); 335838c8a9a5SSteve French if (rc) 335938c8a9a5SSteve French goto close_exit; 336038c8a9a5SSteve French 336138c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 336238c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 336338c8a9a5SSteve French rsp = (struct smb2_close_rsp *)rsp_iov.iov_base; 336438c8a9a5SSteve French 336538c8a9a5SSteve French if (rc != 0) { 336638c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE); 336738c8a9a5SSteve French trace_smb3_close_err(xid, persistent_fid, tcon->tid, ses->Suid, 336838c8a9a5SSteve French rc); 336938c8a9a5SSteve French goto close_exit; 337038c8a9a5SSteve French } else { 337138c8a9a5SSteve French trace_smb3_close_done(xid, persistent_fid, tcon->tid, 337238c8a9a5SSteve French ses->Suid); 337338c8a9a5SSteve French /* 337438c8a9a5SSteve French * Note that have to subtract 4 since struct network_open_info 337538c8a9a5SSteve French * has a final 4 byte pad that close response does not have 337638c8a9a5SSteve French */ 337738c8a9a5SSteve French if (pbuf) 337838c8a9a5SSteve French memcpy(pbuf, (char *)&rsp->CreationTime, sizeof(*pbuf) - 4); 337938c8a9a5SSteve French } 338038c8a9a5SSteve French 338138c8a9a5SSteve French atomic_dec(&tcon->num_remote_opens); 338238c8a9a5SSteve French close_exit: 338338c8a9a5SSteve French SMB2_close_free(&rqst); 338438c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp); 338538c8a9a5SSteve French 338638c8a9a5SSteve French /* retry close in a worker thread if this one is interrupted */ 338738c8a9a5SSteve French if (is_interrupt_error(rc)) { 338838c8a9a5SSteve French int tmp_rc; 338938c8a9a5SSteve French 339038c8a9a5SSteve French tmp_rc = smb2_handle_cancelled_close(tcon, persistent_fid, 339138c8a9a5SSteve French volatile_fid); 339238c8a9a5SSteve French if (tmp_rc) 339338c8a9a5SSteve French cifs_dbg(VFS, "handle cancelled close fid 0x%llx returned error %d\n", 339438c8a9a5SSteve French persistent_fid, tmp_rc); 339538c8a9a5SSteve French } 339638c8a9a5SSteve French return rc; 339738c8a9a5SSteve French } 339838c8a9a5SSteve French 339938c8a9a5SSteve French int 340038c8a9a5SSteve French SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, 340138c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid) 340238c8a9a5SSteve French { 340338c8a9a5SSteve French return __SMB2_close(xid, tcon, persistent_fid, volatile_fid, NULL); 340438c8a9a5SSteve French } 340538c8a9a5SSteve French 340638c8a9a5SSteve French int 340738c8a9a5SSteve French smb2_validate_iov(unsigned int offset, unsigned int buffer_length, 340838c8a9a5SSteve French struct kvec *iov, unsigned int min_buf_size) 340938c8a9a5SSteve French { 341038c8a9a5SSteve French unsigned int smb_len = iov->iov_len; 341138c8a9a5SSteve French char *end_of_smb = smb_len + (char *)iov->iov_base; 341238c8a9a5SSteve French char *begin_of_buf = offset + (char *)iov->iov_base; 341338c8a9a5SSteve French char *end_of_buf = begin_of_buf + buffer_length; 341438c8a9a5SSteve French 341538c8a9a5SSteve French 341638c8a9a5SSteve French if (buffer_length < min_buf_size) { 341738c8a9a5SSteve French cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n", 341838c8a9a5SSteve French buffer_length, min_buf_size); 341938c8a9a5SSteve French return -EINVAL; 342038c8a9a5SSteve French } 342138c8a9a5SSteve French 342238c8a9a5SSteve French /* check if beyond RFC1001 maximum length */ 342338c8a9a5SSteve French if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) { 342438c8a9a5SSteve French cifs_dbg(VFS, "buffer length %d or smb length %d too large\n", 342538c8a9a5SSteve French buffer_length, smb_len); 342638c8a9a5SSteve French return -EINVAL; 342738c8a9a5SSteve French } 342838c8a9a5SSteve French 342938c8a9a5SSteve French if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) { 343038c8a9a5SSteve French cifs_dbg(VFS, "Invalid server response, bad offset to data\n"); 343138c8a9a5SSteve French return -EINVAL; 343238c8a9a5SSteve French } 343338c8a9a5SSteve French 343438c8a9a5SSteve French return 0; 343538c8a9a5SSteve French } 343638c8a9a5SSteve French 343738c8a9a5SSteve French /* 343838c8a9a5SSteve French * If SMB buffer fields are valid, copy into temporary buffer to hold result. 343938c8a9a5SSteve French * Caller must free buffer. 344038c8a9a5SSteve French */ 344138c8a9a5SSteve French int 344238c8a9a5SSteve French smb2_validate_and_copy_iov(unsigned int offset, unsigned int buffer_length, 344338c8a9a5SSteve French struct kvec *iov, unsigned int minbufsize, 344438c8a9a5SSteve French char *data) 344538c8a9a5SSteve French { 344638c8a9a5SSteve French char *begin_of_buf = offset + (char *)iov->iov_base; 344738c8a9a5SSteve French int rc; 344838c8a9a5SSteve French 344938c8a9a5SSteve French if (!data) 345038c8a9a5SSteve French return -EINVAL; 345138c8a9a5SSteve French 345238c8a9a5SSteve French rc = smb2_validate_iov(offset, buffer_length, iov, minbufsize); 345338c8a9a5SSteve French if (rc) 345438c8a9a5SSteve French return rc; 345538c8a9a5SSteve French 345638c8a9a5SSteve French memcpy(data, begin_of_buf, minbufsize); 345738c8a9a5SSteve French 345838c8a9a5SSteve French return 0; 345938c8a9a5SSteve French } 346038c8a9a5SSteve French 346138c8a9a5SSteve French int 346238c8a9a5SSteve French SMB2_query_info_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server, 346338c8a9a5SSteve French struct smb_rqst *rqst, 346438c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, 346538c8a9a5SSteve French u8 info_class, u8 info_type, u32 additional_info, 346638c8a9a5SSteve French size_t output_len, size_t input_len, void *input) 346738c8a9a5SSteve French { 346838c8a9a5SSteve French struct smb2_query_info_req *req; 346938c8a9a5SSteve French struct kvec *iov = rqst->rq_iov; 347038c8a9a5SSteve French unsigned int total_len; 347138c8a9a5SSteve French int rc; 347238c8a9a5SSteve French 347338c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, server, 347438c8a9a5SSteve French (void **) &req, &total_len); 347538c8a9a5SSteve French if (rc) 347638c8a9a5SSteve French return rc; 347738c8a9a5SSteve French 347838c8a9a5SSteve French req->InfoType = info_type; 347938c8a9a5SSteve French req->FileInfoClass = info_class; 348038c8a9a5SSteve French req->PersistentFileId = persistent_fid; 348138c8a9a5SSteve French req->VolatileFileId = volatile_fid; 348238c8a9a5SSteve French req->AdditionalInformation = cpu_to_le32(additional_info); 348338c8a9a5SSteve French 348438c8a9a5SSteve French req->OutputBufferLength = cpu_to_le32(output_len); 348538c8a9a5SSteve French if (input_len) { 348638c8a9a5SSteve French req->InputBufferLength = cpu_to_le32(input_len); 348738c8a9a5SSteve French /* total_len for smb query request never close to le16 max */ 348838c8a9a5SSteve French req->InputBufferOffset = cpu_to_le16(total_len - 1); 348938c8a9a5SSteve French memcpy(req->Buffer, input, input_len); 349038c8a9a5SSteve French } 349138c8a9a5SSteve French 349238c8a9a5SSteve French iov[0].iov_base = (char *)req; 349338c8a9a5SSteve French /* 1 for Buffer */ 349438c8a9a5SSteve French iov[0].iov_len = total_len - 1 + input_len; 349538c8a9a5SSteve French return 0; 349638c8a9a5SSteve French } 349738c8a9a5SSteve French 349838c8a9a5SSteve French void 349938c8a9a5SSteve French SMB2_query_info_free(struct smb_rqst *rqst) 350038c8a9a5SSteve French { 350138c8a9a5SSteve French if (rqst && rqst->rq_iov) 350238c8a9a5SSteve French cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */ 350338c8a9a5SSteve French } 350438c8a9a5SSteve French 350538c8a9a5SSteve French static int 350638c8a9a5SSteve French query_info(const unsigned int xid, struct cifs_tcon *tcon, 350738c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, u8 info_class, u8 info_type, 350838c8a9a5SSteve French u32 additional_info, size_t output_len, size_t min_len, void **data, 350938c8a9a5SSteve French u32 *dlen) 351038c8a9a5SSteve French { 351138c8a9a5SSteve French struct smb_rqst rqst; 351238c8a9a5SSteve French struct smb2_query_info_rsp *rsp = NULL; 351338c8a9a5SSteve French struct kvec iov[1]; 351438c8a9a5SSteve French struct kvec rsp_iov; 351538c8a9a5SSteve French int rc = 0; 351638c8a9a5SSteve French int resp_buftype = CIFS_NO_BUFFER; 351738c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 351838c8a9a5SSteve French struct TCP_Server_Info *server; 351938c8a9a5SSteve French int flags = 0; 352038c8a9a5SSteve French bool allocated = false; 352138c8a9a5SSteve French 352238c8a9a5SSteve French cifs_dbg(FYI, "Query Info\n"); 352338c8a9a5SSteve French 352438c8a9a5SSteve French if (!ses) 352538c8a9a5SSteve French return -EIO; 352638c8a9a5SSteve French server = cifs_pick_channel(ses); 352738c8a9a5SSteve French if (!server) 352838c8a9a5SSteve French return -EIO; 352938c8a9a5SSteve French 353038c8a9a5SSteve French if (smb3_encryption_required(tcon)) 353138c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 353238c8a9a5SSteve French 353338c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 353438c8a9a5SSteve French memset(&iov, 0, sizeof(iov)); 353538c8a9a5SSteve French rqst.rq_iov = iov; 353638c8a9a5SSteve French rqst.rq_nvec = 1; 353738c8a9a5SSteve French 353838c8a9a5SSteve French rc = SMB2_query_info_init(tcon, server, 353938c8a9a5SSteve French &rqst, persistent_fid, volatile_fid, 354038c8a9a5SSteve French info_class, info_type, additional_info, 354138c8a9a5SSteve French output_len, 0, NULL); 354238c8a9a5SSteve French if (rc) 354338c8a9a5SSteve French goto qinf_exit; 354438c8a9a5SSteve French 354538c8a9a5SSteve French trace_smb3_query_info_enter(xid, persistent_fid, tcon->tid, 354638c8a9a5SSteve French ses->Suid, info_class, (__u32)info_type); 354738c8a9a5SSteve French 354838c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 354938c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 355038c8a9a5SSteve French rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 355138c8a9a5SSteve French 355238c8a9a5SSteve French if (rc) { 355338c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); 355438c8a9a5SSteve French trace_smb3_query_info_err(xid, persistent_fid, tcon->tid, 355538c8a9a5SSteve French ses->Suid, info_class, (__u32)info_type, rc); 355638c8a9a5SSteve French goto qinf_exit; 355738c8a9a5SSteve French } 355838c8a9a5SSteve French 355938c8a9a5SSteve French trace_smb3_query_info_done(xid, persistent_fid, tcon->tid, 356038c8a9a5SSteve French ses->Suid, info_class, (__u32)info_type); 356138c8a9a5SSteve French 356238c8a9a5SSteve French if (dlen) { 356338c8a9a5SSteve French *dlen = le32_to_cpu(rsp->OutputBufferLength); 356438c8a9a5SSteve French if (!*data) { 356538c8a9a5SSteve French *data = kmalloc(*dlen, GFP_KERNEL); 356638c8a9a5SSteve French if (!*data) { 356738c8a9a5SSteve French cifs_tcon_dbg(VFS, 356838c8a9a5SSteve French "Error %d allocating memory for acl\n", 356938c8a9a5SSteve French rc); 357038c8a9a5SSteve French *dlen = 0; 357138c8a9a5SSteve French rc = -ENOMEM; 357238c8a9a5SSteve French goto qinf_exit; 357338c8a9a5SSteve French } 357438c8a9a5SSteve French allocated = true; 357538c8a9a5SSteve French } 357638c8a9a5SSteve French } 357738c8a9a5SSteve French 357838c8a9a5SSteve French rc = smb2_validate_and_copy_iov(le16_to_cpu(rsp->OutputBufferOffset), 357938c8a9a5SSteve French le32_to_cpu(rsp->OutputBufferLength), 358038c8a9a5SSteve French &rsp_iov, dlen ? *dlen : min_len, *data); 358138c8a9a5SSteve French if (rc && allocated) { 358238c8a9a5SSteve French kfree(*data); 358338c8a9a5SSteve French *data = NULL; 358438c8a9a5SSteve French *dlen = 0; 358538c8a9a5SSteve French } 358638c8a9a5SSteve French 358738c8a9a5SSteve French qinf_exit: 358838c8a9a5SSteve French SMB2_query_info_free(&rqst); 358938c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp); 359038c8a9a5SSteve French return rc; 359138c8a9a5SSteve French } 359238c8a9a5SSteve French 359338c8a9a5SSteve French int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon, 359438c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, struct smb2_file_all_info *data) 359538c8a9a5SSteve French { 359638c8a9a5SSteve French return query_info(xid, tcon, persistent_fid, volatile_fid, 359738c8a9a5SSteve French FILE_ALL_INFORMATION, SMB2_O_INFO_FILE, 0, 359838c8a9a5SSteve French sizeof(struct smb2_file_all_info) + PATH_MAX * 2, 359938c8a9a5SSteve French sizeof(struct smb2_file_all_info), (void **)&data, 360038c8a9a5SSteve French NULL); 360138c8a9a5SSteve French } 360238c8a9a5SSteve French 360338c8a9a5SSteve French #if 0 360438c8a9a5SSteve French /* currently unused, as now we are doing compounding instead (see smb311_posix_query_path_info) */ 360538c8a9a5SSteve French int 360638c8a9a5SSteve French SMB311_posix_query_info(const unsigned int xid, struct cifs_tcon *tcon, 360738c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, struct smb311_posix_qinfo *data, u32 *plen) 360838c8a9a5SSteve French { 360938c8a9a5SSteve French size_t output_len = sizeof(struct smb311_posix_qinfo *) + 361038c8a9a5SSteve French (sizeof(struct cifs_sid) * 2) + (PATH_MAX * 2); 361138c8a9a5SSteve French *plen = 0; 361238c8a9a5SSteve French 361338c8a9a5SSteve French return query_info(xid, tcon, persistent_fid, volatile_fid, 361438c8a9a5SSteve French SMB_FIND_FILE_POSIX_INFO, SMB2_O_INFO_FILE, 0, 361538c8a9a5SSteve French output_len, sizeof(struct smb311_posix_qinfo), (void **)&data, plen); 361638c8a9a5SSteve French /* Note caller must free "data" (passed in above). It may be allocated in query_info call */ 361738c8a9a5SSteve French } 361838c8a9a5SSteve French #endif 361938c8a9a5SSteve French 362038c8a9a5SSteve French int 362138c8a9a5SSteve French SMB2_query_acl(const unsigned int xid, struct cifs_tcon *tcon, 362238c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, 362338c8a9a5SSteve French void **data, u32 *plen, u32 extra_info) 362438c8a9a5SSteve French { 362538c8a9a5SSteve French __u32 additional_info = OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO | 362638c8a9a5SSteve French extra_info; 362738c8a9a5SSteve French *plen = 0; 362838c8a9a5SSteve French 362938c8a9a5SSteve French return query_info(xid, tcon, persistent_fid, volatile_fid, 363038c8a9a5SSteve French 0, SMB2_O_INFO_SECURITY, additional_info, 363138c8a9a5SSteve French SMB2_MAX_BUFFER_SIZE, MIN_SEC_DESC_LEN, data, plen); 363238c8a9a5SSteve French } 363338c8a9a5SSteve French 363438c8a9a5SSteve French int 363538c8a9a5SSteve French SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon, 363638c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid) 363738c8a9a5SSteve French { 363838c8a9a5SSteve French return query_info(xid, tcon, persistent_fid, volatile_fid, 363938c8a9a5SSteve French FILE_INTERNAL_INFORMATION, SMB2_O_INFO_FILE, 0, 364038c8a9a5SSteve French sizeof(struct smb2_file_internal_info), 364138c8a9a5SSteve French sizeof(struct smb2_file_internal_info), 364238c8a9a5SSteve French (void **)&uniqueid, NULL); 364338c8a9a5SSteve French } 364438c8a9a5SSteve French 364538c8a9a5SSteve French /* 364638c8a9a5SSteve French * CHANGE_NOTIFY Request is sent to get notifications on changes to a directory 364738c8a9a5SSteve French * See MS-SMB2 2.2.35 and 2.2.36 364838c8a9a5SSteve French */ 364938c8a9a5SSteve French 365038c8a9a5SSteve French static int 365138c8a9a5SSteve French SMB2_notify_init(const unsigned int xid, struct smb_rqst *rqst, 365238c8a9a5SSteve French struct cifs_tcon *tcon, struct TCP_Server_Info *server, 365338c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, 365438c8a9a5SSteve French u32 completion_filter, bool watch_tree) 365538c8a9a5SSteve French { 365638c8a9a5SSteve French struct smb2_change_notify_req *req; 365738c8a9a5SSteve French struct kvec *iov = rqst->rq_iov; 365838c8a9a5SSteve French unsigned int total_len; 365938c8a9a5SSteve French int rc; 366038c8a9a5SSteve French 366138c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_CHANGE_NOTIFY, tcon, server, 366238c8a9a5SSteve French (void **) &req, &total_len); 366338c8a9a5SSteve French if (rc) 366438c8a9a5SSteve French return rc; 366538c8a9a5SSteve French 366638c8a9a5SSteve French req->PersistentFileId = persistent_fid; 366738c8a9a5SSteve French req->VolatileFileId = volatile_fid; 366838c8a9a5SSteve French /* See note 354 of MS-SMB2, 64K max */ 366938c8a9a5SSteve French req->OutputBufferLength = 367038c8a9a5SSteve French cpu_to_le32(SMB2_MAX_BUFFER_SIZE - MAX_SMB2_HDR_SIZE); 367138c8a9a5SSteve French req->CompletionFilter = cpu_to_le32(completion_filter); 367238c8a9a5SSteve French if (watch_tree) 367338c8a9a5SSteve French req->Flags = cpu_to_le16(SMB2_WATCH_TREE); 367438c8a9a5SSteve French else 367538c8a9a5SSteve French req->Flags = 0; 367638c8a9a5SSteve French 367738c8a9a5SSteve French iov[0].iov_base = (char *)req; 367838c8a9a5SSteve French iov[0].iov_len = total_len; 367938c8a9a5SSteve French 368038c8a9a5SSteve French return 0; 368138c8a9a5SSteve French } 368238c8a9a5SSteve French 368338c8a9a5SSteve French int 368438c8a9a5SSteve French SMB2_change_notify(const unsigned int xid, struct cifs_tcon *tcon, 368538c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, bool watch_tree, 368638c8a9a5SSteve French u32 completion_filter, u32 max_out_data_len, char **out_data, 368738c8a9a5SSteve French u32 *plen /* returned data len */) 368838c8a9a5SSteve French { 368938c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 369038c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 369138c8a9a5SSteve French struct smb_rqst rqst; 369238c8a9a5SSteve French struct smb2_change_notify_rsp *smb_rsp; 369338c8a9a5SSteve French struct kvec iov[1]; 369438c8a9a5SSteve French struct kvec rsp_iov = {NULL, 0}; 369538c8a9a5SSteve French int resp_buftype = CIFS_NO_BUFFER; 369638c8a9a5SSteve French int flags = 0; 369738c8a9a5SSteve French int rc = 0; 369838c8a9a5SSteve French 369938c8a9a5SSteve French cifs_dbg(FYI, "change notify\n"); 370038c8a9a5SSteve French if (!ses || !server) 370138c8a9a5SSteve French return -EIO; 370238c8a9a5SSteve French 370338c8a9a5SSteve French if (smb3_encryption_required(tcon)) 370438c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 370538c8a9a5SSteve French 370638c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 370738c8a9a5SSteve French memset(&iov, 0, sizeof(iov)); 370838c8a9a5SSteve French if (plen) 370938c8a9a5SSteve French *plen = 0; 371038c8a9a5SSteve French 371138c8a9a5SSteve French rqst.rq_iov = iov; 371238c8a9a5SSteve French rqst.rq_nvec = 1; 371338c8a9a5SSteve French 371438c8a9a5SSteve French rc = SMB2_notify_init(xid, &rqst, tcon, server, 371538c8a9a5SSteve French persistent_fid, volatile_fid, 371638c8a9a5SSteve French completion_filter, watch_tree); 371738c8a9a5SSteve French if (rc) 371838c8a9a5SSteve French goto cnotify_exit; 371938c8a9a5SSteve French 372038c8a9a5SSteve French trace_smb3_notify_enter(xid, persistent_fid, tcon->tid, ses->Suid, 372138c8a9a5SSteve French (u8)watch_tree, completion_filter); 372238c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 372338c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 372438c8a9a5SSteve French 372538c8a9a5SSteve French if (rc != 0) { 372638c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_CHANGE_NOTIFY_HE); 372738c8a9a5SSteve French trace_smb3_notify_err(xid, persistent_fid, tcon->tid, ses->Suid, 372838c8a9a5SSteve French (u8)watch_tree, completion_filter, rc); 372938c8a9a5SSteve French } else { 373038c8a9a5SSteve French trace_smb3_notify_done(xid, persistent_fid, tcon->tid, 373138c8a9a5SSteve French ses->Suid, (u8)watch_tree, completion_filter); 373238c8a9a5SSteve French /* validate that notify information is plausible */ 373338c8a9a5SSteve French if ((rsp_iov.iov_base == NULL) || 373438c8a9a5SSteve French (rsp_iov.iov_len < sizeof(struct smb2_change_notify_rsp) + 1)) 373538c8a9a5SSteve French goto cnotify_exit; 373638c8a9a5SSteve French 373738c8a9a5SSteve French smb_rsp = (struct smb2_change_notify_rsp *)rsp_iov.iov_base; 373838c8a9a5SSteve French 373938c8a9a5SSteve French smb2_validate_iov(le16_to_cpu(smb_rsp->OutputBufferOffset), 374038c8a9a5SSteve French le32_to_cpu(smb_rsp->OutputBufferLength), &rsp_iov, 374138c8a9a5SSteve French sizeof(struct file_notify_information)); 374238c8a9a5SSteve French 374338c8a9a5SSteve French *out_data = kmemdup((char *)smb_rsp + le16_to_cpu(smb_rsp->OutputBufferOffset), 374438c8a9a5SSteve French le32_to_cpu(smb_rsp->OutputBufferLength), GFP_KERNEL); 374538c8a9a5SSteve French if (*out_data == NULL) { 374638c8a9a5SSteve French rc = -ENOMEM; 374738c8a9a5SSteve French goto cnotify_exit; 3748b535cc79SSteve French } else if (plen) 374938c8a9a5SSteve French *plen = le32_to_cpu(smb_rsp->OutputBufferLength); 375038c8a9a5SSteve French } 375138c8a9a5SSteve French 375238c8a9a5SSteve French cnotify_exit: 375338c8a9a5SSteve French if (rqst.rq_iov) 375438c8a9a5SSteve French cifs_small_buf_release(rqst.rq_iov[0].iov_base); /* request */ 375538c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp_iov.iov_base); 375638c8a9a5SSteve French return rc; 375738c8a9a5SSteve French } 375838c8a9a5SSteve French 375938c8a9a5SSteve French 376038c8a9a5SSteve French 376138c8a9a5SSteve French /* 376238c8a9a5SSteve French * This is a no-op for now. We're not really interested in the reply, but 376338c8a9a5SSteve French * rather in the fact that the server sent one and that server->lstrp 376438c8a9a5SSteve French * gets updated. 376538c8a9a5SSteve French * 376638c8a9a5SSteve French * FIXME: maybe we should consider checking that the reply matches request? 376738c8a9a5SSteve French */ 376838c8a9a5SSteve French static void 376938c8a9a5SSteve French smb2_echo_callback(struct mid_q_entry *mid) 377038c8a9a5SSteve French { 377138c8a9a5SSteve French struct TCP_Server_Info *server = mid->callback_data; 377238c8a9a5SSteve French struct smb2_echo_rsp *rsp = (struct smb2_echo_rsp *)mid->resp_buf; 377338c8a9a5SSteve French struct cifs_credits credits = { .value = 0, .instance = 0 }; 377438c8a9a5SSteve French 377538c8a9a5SSteve French if (mid->mid_state == MID_RESPONSE_RECEIVED 377638c8a9a5SSteve French || mid->mid_state == MID_RESPONSE_MALFORMED) { 377738c8a9a5SSteve French credits.value = le16_to_cpu(rsp->hdr.CreditRequest); 377838c8a9a5SSteve French credits.instance = server->reconnect_instance; 377938c8a9a5SSteve French } 378038c8a9a5SSteve French 378138c8a9a5SSteve French release_mid(mid); 378238c8a9a5SSteve French add_credits(server, &credits, CIFS_ECHO_OP); 378338c8a9a5SSteve French } 378438c8a9a5SSteve French 378538c8a9a5SSteve French void smb2_reconnect_server(struct work_struct *work) 378638c8a9a5SSteve French { 378738c8a9a5SSteve French struct TCP_Server_Info *server = container_of(work, 378838c8a9a5SSteve French struct TCP_Server_Info, reconnect.work); 378938c8a9a5SSteve French struct TCP_Server_Info *pserver; 379038c8a9a5SSteve French struct cifs_ses *ses, *ses2; 379138c8a9a5SSteve French struct cifs_tcon *tcon, *tcon2; 379238c8a9a5SSteve French struct list_head tmp_list, tmp_ses_list; 379338c8a9a5SSteve French bool tcon_exist = false, ses_exist = false; 379438c8a9a5SSteve French bool tcon_selected = false; 379538c8a9a5SSteve French int rc; 379638c8a9a5SSteve French bool resched = false; 379738c8a9a5SSteve French 379838c8a9a5SSteve French /* If server is a channel, select the primary channel */ 3799*b3773b19SSteve French pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; 380038c8a9a5SSteve French 380138c8a9a5SSteve French /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */ 380238c8a9a5SSteve French mutex_lock(&pserver->reconnect_mutex); 380338c8a9a5SSteve French 380438c8a9a5SSteve French INIT_LIST_HEAD(&tmp_list); 380538c8a9a5SSteve French INIT_LIST_HEAD(&tmp_ses_list); 380638c8a9a5SSteve French cifs_dbg(FYI, "Reconnecting tcons and channels\n"); 380738c8a9a5SSteve French 380838c8a9a5SSteve French spin_lock(&cifs_tcp_ses_lock); 380938c8a9a5SSteve French list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { 381099f28070SWinston Wen spin_lock(&ses->ses_lock); 381199f28070SWinston Wen if (ses->ses_status == SES_EXITING) { 381299f28070SWinston Wen spin_unlock(&ses->ses_lock); 381399f28070SWinston Wen continue; 381499f28070SWinston Wen } 381599f28070SWinston Wen spin_unlock(&ses->ses_lock); 381638c8a9a5SSteve French 381738c8a9a5SSteve French tcon_selected = false; 381838c8a9a5SSteve French 381938c8a9a5SSteve French list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { 382038c8a9a5SSteve French if (tcon->need_reconnect || tcon->need_reopen_files) { 382138c8a9a5SSteve French tcon->tc_count++; 382238c8a9a5SSteve French list_add_tail(&tcon->rlist, &tmp_list); 382338c8a9a5SSteve French tcon_selected = tcon_exist = true; 382438c8a9a5SSteve French } 382538c8a9a5SSteve French } 382638c8a9a5SSteve French /* 382738c8a9a5SSteve French * IPC has the same lifetime as its session and uses its 382838c8a9a5SSteve French * refcount. 382938c8a9a5SSteve French */ 383038c8a9a5SSteve French if (ses->tcon_ipc && ses->tcon_ipc->need_reconnect) { 383138c8a9a5SSteve French list_add_tail(&ses->tcon_ipc->rlist, &tmp_list); 383238c8a9a5SSteve French tcon_selected = tcon_exist = true; 383338c8a9a5SSteve French cifs_smb_ses_inc_refcount(ses); 383438c8a9a5SSteve French } 383538c8a9a5SSteve French /* 383638c8a9a5SSteve French * handle the case where channel needs to reconnect 383738c8a9a5SSteve French * binding session, but tcon is healthy (some other channel 383838c8a9a5SSteve French * is active) 383938c8a9a5SSteve French */ 384038c8a9a5SSteve French spin_lock(&ses->chan_lock); 384138c8a9a5SSteve French if (!tcon_selected && cifs_chan_needs_reconnect(ses, server)) { 384238c8a9a5SSteve French list_add_tail(&ses->rlist, &tmp_ses_list); 384338c8a9a5SSteve French ses_exist = true; 384438c8a9a5SSteve French cifs_smb_ses_inc_refcount(ses); 384538c8a9a5SSteve French } 384638c8a9a5SSteve French spin_unlock(&ses->chan_lock); 384738c8a9a5SSteve French } 384838c8a9a5SSteve French /* 384938c8a9a5SSteve French * Get the reference to server struct to be sure that the last call of 385038c8a9a5SSteve French * cifs_put_tcon() in the loop below won't release the server pointer. 385138c8a9a5SSteve French */ 385238c8a9a5SSteve French if (tcon_exist || ses_exist) 385338c8a9a5SSteve French server->srv_count++; 385438c8a9a5SSteve French 385538c8a9a5SSteve French spin_unlock(&cifs_tcp_ses_lock); 385638c8a9a5SSteve French 385738c8a9a5SSteve French list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) { 385838c8a9a5SSteve French rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon, server); 385938c8a9a5SSteve French if (!rc) 386038c8a9a5SSteve French cifs_reopen_persistent_handles(tcon); 386138c8a9a5SSteve French else 386238c8a9a5SSteve French resched = true; 386338c8a9a5SSteve French list_del_init(&tcon->rlist); 386438c8a9a5SSteve French if (tcon->ipc) 386538c8a9a5SSteve French cifs_put_smb_ses(tcon->ses); 386638c8a9a5SSteve French else 386738c8a9a5SSteve French cifs_put_tcon(tcon); 386838c8a9a5SSteve French } 386938c8a9a5SSteve French 387038c8a9a5SSteve French if (!ses_exist) 387138c8a9a5SSteve French goto done; 387238c8a9a5SSteve French 387338c8a9a5SSteve French /* allocate a dummy tcon struct used for reconnect */ 387438c8a9a5SSteve French tcon = tconInfoAlloc(); 387538c8a9a5SSteve French if (!tcon) { 387638c8a9a5SSteve French resched = true; 387738c8a9a5SSteve French list_for_each_entry_safe(ses, ses2, &tmp_ses_list, rlist) { 387838c8a9a5SSteve French list_del_init(&ses->rlist); 387938c8a9a5SSteve French cifs_put_smb_ses(ses); 388038c8a9a5SSteve French } 388138c8a9a5SSteve French goto done; 388238c8a9a5SSteve French } 388338c8a9a5SSteve French 388438c8a9a5SSteve French tcon->status = TID_GOOD; 388538c8a9a5SSteve French tcon->retry = false; 388638c8a9a5SSteve French tcon->need_reconnect = false; 388738c8a9a5SSteve French 388838c8a9a5SSteve French /* now reconnect sessions for necessary channels */ 388938c8a9a5SSteve French list_for_each_entry_safe(ses, ses2, &tmp_ses_list, rlist) { 389038c8a9a5SSteve French tcon->ses = ses; 389138c8a9a5SSteve French rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon, server); 389238c8a9a5SSteve French if (rc) 389338c8a9a5SSteve French resched = true; 389438c8a9a5SSteve French list_del_init(&ses->rlist); 389538c8a9a5SSteve French cifs_put_smb_ses(ses); 389638c8a9a5SSteve French } 389738c8a9a5SSteve French tconInfoFree(tcon); 389838c8a9a5SSteve French 389938c8a9a5SSteve French done: 390038c8a9a5SSteve French cifs_dbg(FYI, "Reconnecting tcons and channels finished\n"); 390138c8a9a5SSteve French if (resched) 390238c8a9a5SSteve French queue_delayed_work(cifsiod_wq, &server->reconnect, 2 * HZ); 390338c8a9a5SSteve French mutex_unlock(&pserver->reconnect_mutex); 390438c8a9a5SSteve French 390538c8a9a5SSteve French /* now we can safely release srv struct */ 390638c8a9a5SSteve French if (tcon_exist || ses_exist) 390738c8a9a5SSteve French cifs_put_tcp_session(server, 1); 390838c8a9a5SSteve French } 390938c8a9a5SSteve French 391038c8a9a5SSteve French int 391138c8a9a5SSteve French SMB2_echo(struct TCP_Server_Info *server) 391238c8a9a5SSteve French { 391338c8a9a5SSteve French struct smb2_echo_req *req; 391438c8a9a5SSteve French int rc = 0; 391538c8a9a5SSteve French struct kvec iov[1]; 391638c8a9a5SSteve French struct smb_rqst rqst = { .rq_iov = iov, 391738c8a9a5SSteve French .rq_nvec = 1 }; 391838c8a9a5SSteve French unsigned int total_len; 391938c8a9a5SSteve French 392038c8a9a5SSteve French cifs_dbg(FYI, "In echo request for conn_id %lld\n", server->conn_id); 392138c8a9a5SSteve French 392238c8a9a5SSteve French spin_lock(&server->srv_lock); 392338c8a9a5SSteve French if (server->ops->need_neg && 392438c8a9a5SSteve French server->ops->need_neg(server)) { 392538c8a9a5SSteve French spin_unlock(&server->srv_lock); 392638c8a9a5SSteve French /* No need to send echo on newly established connections */ 392738c8a9a5SSteve French mod_delayed_work(cifsiod_wq, &server->reconnect, 0); 392838c8a9a5SSteve French return rc; 392938c8a9a5SSteve French } 393038c8a9a5SSteve French spin_unlock(&server->srv_lock); 393138c8a9a5SSteve French 393238c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_ECHO, NULL, server, 393338c8a9a5SSteve French (void **)&req, &total_len); 393438c8a9a5SSteve French if (rc) 393538c8a9a5SSteve French return rc; 393638c8a9a5SSteve French 393738c8a9a5SSteve French req->hdr.CreditRequest = cpu_to_le16(1); 393838c8a9a5SSteve French 393938c8a9a5SSteve French iov[0].iov_len = total_len; 394038c8a9a5SSteve French iov[0].iov_base = (char *)req; 394138c8a9a5SSteve French 394238c8a9a5SSteve French rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL, 394338c8a9a5SSteve French server, CIFS_ECHO_OP, NULL); 394438c8a9a5SSteve French if (rc) 394538c8a9a5SSteve French cifs_dbg(FYI, "Echo request failed: %d\n", rc); 394638c8a9a5SSteve French 394738c8a9a5SSteve French cifs_small_buf_release(req); 394838c8a9a5SSteve French return rc; 394938c8a9a5SSteve French } 395038c8a9a5SSteve French 395138c8a9a5SSteve French void 395238c8a9a5SSteve French SMB2_flush_free(struct smb_rqst *rqst) 395338c8a9a5SSteve French { 395438c8a9a5SSteve French if (rqst && rqst->rq_iov) 395538c8a9a5SSteve French cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */ 395638c8a9a5SSteve French } 395738c8a9a5SSteve French 395838c8a9a5SSteve French int 395938c8a9a5SSteve French SMB2_flush_init(const unsigned int xid, struct smb_rqst *rqst, 396038c8a9a5SSteve French struct cifs_tcon *tcon, struct TCP_Server_Info *server, 396138c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid) 396238c8a9a5SSteve French { 396338c8a9a5SSteve French struct smb2_flush_req *req; 396438c8a9a5SSteve French struct kvec *iov = rqst->rq_iov; 396538c8a9a5SSteve French unsigned int total_len; 396638c8a9a5SSteve French int rc; 396738c8a9a5SSteve French 396838c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_FLUSH, tcon, server, 396938c8a9a5SSteve French (void **) &req, &total_len); 397038c8a9a5SSteve French if (rc) 397138c8a9a5SSteve French return rc; 397238c8a9a5SSteve French 397338c8a9a5SSteve French req->PersistentFileId = persistent_fid; 397438c8a9a5SSteve French req->VolatileFileId = volatile_fid; 397538c8a9a5SSteve French 397638c8a9a5SSteve French iov[0].iov_base = (char *)req; 397738c8a9a5SSteve French iov[0].iov_len = total_len; 397838c8a9a5SSteve French 397938c8a9a5SSteve French return 0; 398038c8a9a5SSteve French } 398138c8a9a5SSteve French 398238c8a9a5SSteve French int 398338c8a9a5SSteve French SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, 398438c8a9a5SSteve French u64 volatile_fid) 398538c8a9a5SSteve French { 398638c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 398738c8a9a5SSteve French struct smb_rqst rqst; 398838c8a9a5SSteve French struct kvec iov[1]; 398938c8a9a5SSteve French struct kvec rsp_iov = {NULL, 0}; 399038c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 399138c8a9a5SSteve French int resp_buftype = CIFS_NO_BUFFER; 399238c8a9a5SSteve French int flags = 0; 399338c8a9a5SSteve French int rc = 0; 399438c8a9a5SSteve French 399538c8a9a5SSteve French cifs_dbg(FYI, "flush\n"); 399638c8a9a5SSteve French if (!ses || !(ses->server)) 399738c8a9a5SSteve French return -EIO; 399838c8a9a5SSteve French 399938c8a9a5SSteve French if (smb3_encryption_required(tcon)) 400038c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 400138c8a9a5SSteve French 400238c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 400338c8a9a5SSteve French memset(&iov, 0, sizeof(iov)); 400438c8a9a5SSteve French rqst.rq_iov = iov; 400538c8a9a5SSteve French rqst.rq_nvec = 1; 400638c8a9a5SSteve French 400738c8a9a5SSteve French rc = SMB2_flush_init(xid, &rqst, tcon, server, 400838c8a9a5SSteve French persistent_fid, volatile_fid); 400938c8a9a5SSteve French if (rc) 401038c8a9a5SSteve French goto flush_exit; 401138c8a9a5SSteve French 401238c8a9a5SSteve French trace_smb3_flush_enter(xid, persistent_fid, tcon->tid, ses->Suid); 401338c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 401438c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 401538c8a9a5SSteve French 401638c8a9a5SSteve French if (rc != 0) { 401738c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE); 401838c8a9a5SSteve French trace_smb3_flush_err(xid, persistent_fid, tcon->tid, ses->Suid, 401938c8a9a5SSteve French rc); 402038c8a9a5SSteve French } else 402138c8a9a5SSteve French trace_smb3_flush_done(xid, persistent_fid, tcon->tid, 402238c8a9a5SSteve French ses->Suid); 402338c8a9a5SSteve French 402438c8a9a5SSteve French flush_exit: 402538c8a9a5SSteve French SMB2_flush_free(&rqst); 402638c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp_iov.iov_base); 402738c8a9a5SSteve French return rc; 402838c8a9a5SSteve French } 402938c8a9a5SSteve French 403038c8a9a5SSteve French #ifdef CONFIG_CIFS_SMB_DIRECT 403138c8a9a5SSteve French static inline bool smb3_use_rdma_offload(struct cifs_io_parms *io_parms) 403238c8a9a5SSteve French { 403338c8a9a5SSteve French struct TCP_Server_Info *server = io_parms->server; 403438c8a9a5SSteve French struct cifs_tcon *tcon = io_parms->tcon; 403538c8a9a5SSteve French 403638c8a9a5SSteve French /* we can only offload if we're connected */ 403738c8a9a5SSteve French if (!server || !tcon) 403838c8a9a5SSteve French return false; 403938c8a9a5SSteve French 404038c8a9a5SSteve French /* we can only offload on an rdma connection */ 404138c8a9a5SSteve French if (!server->rdma || !server->smbd_conn) 404238c8a9a5SSteve French return false; 404338c8a9a5SSteve French 404438c8a9a5SSteve French /* we don't support signed offload yet */ 404538c8a9a5SSteve French if (server->sign) 404638c8a9a5SSteve French return false; 404738c8a9a5SSteve French 404838c8a9a5SSteve French /* we don't support encrypted offload yet */ 404938c8a9a5SSteve French if (smb3_encryption_required(tcon)) 405038c8a9a5SSteve French return false; 405138c8a9a5SSteve French 405238c8a9a5SSteve French /* offload also has its overhead, so only do it if desired */ 405338c8a9a5SSteve French if (io_parms->length < server->smbd_conn->rdma_readwrite_threshold) 405438c8a9a5SSteve French return false; 405538c8a9a5SSteve French 405638c8a9a5SSteve French return true; 405738c8a9a5SSteve French } 405838c8a9a5SSteve French #endif /* CONFIG_CIFS_SMB_DIRECT */ 405938c8a9a5SSteve French 406038c8a9a5SSteve French /* 406138c8a9a5SSteve French * To form a chain of read requests, any read requests after the first should 406238c8a9a5SSteve French * have the end_of_chain boolean set to true. 406338c8a9a5SSteve French */ 406438c8a9a5SSteve French static int 406538c8a9a5SSteve French smb2_new_read_req(void **buf, unsigned int *total_len, 406638c8a9a5SSteve French struct cifs_io_parms *io_parms, struct cifs_readdata *rdata, 406738c8a9a5SSteve French unsigned int remaining_bytes, int request_type) 406838c8a9a5SSteve French { 406938c8a9a5SSteve French int rc = -EACCES; 407038c8a9a5SSteve French struct smb2_read_req *req = NULL; 407138c8a9a5SSteve French struct smb2_hdr *shdr; 407238c8a9a5SSteve French struct TCP_Server_Info *server = io_parms->server; 407338c8a9a5SSteve French 407438c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, server, 407538c8a9a5SSteve French (void **) &req, total_len); 407638c8a9a5SSteve French if (rc) 407738c8a9a5SSteve French return rc; 407838c8a9a5SSteve French 407938c8a9a5SSteve French if (server == NULL) 408038c8a9a5SSteve French return -ECONNABORTED; 408138c8a9a5SSteve French 408238c8a9a5SSteve French shdr = &req->hdr; 408338c8a9a5SSteve French shdr->Id.SyncId.ProcessId = cpu_to_le32(io_parms->pid); 408438c8a9a5SSteve French 408538c8a9a5SSteve French req->PersistentFileId = io_parms->persistent_fid; 408638c8a9a5SSteve French req->VolatileFileId = io_parms->volatile_fid; 408738c8a9a5SSteve French req->ReadChannelInfoOffset = 0; /* reserved */ 408838c8a9a5SSteve French req->ReadChannelInfoLength = 0; /* reserved */ 408938c8a9a5SSteve French req->Channel = 0; /* reserved */ 409038c8a9a5SSteve French req->MinimumCount = 0; 409138c8a9a5SSteve French req->Length = cpu_to_le32(io_parms->length); 409238c8a9a5SSteve French req->Offset = cpu_to_le64(io_parms->offset); 409338c8a9a5SSteve French 409438c8a9a5SSteve French trace_smb3_read_enter(0 /* xid */, 409538c8a9a5SSteve French io_parms->persistent_fid, 409638c8a9a5SSteve French io_parms->tcon->tid, io_parms->tcon->ses->Suid, 409738c8a9a5SSteve French io_parms->offset, io_parms->length); 409838c8a9a5SSteve French #ifdef CONFIG_CIFS_SMB_DIRECT 409938c8a9a5SSteve French /* 410038c8a9a5SSteve French * If we want to do a RDMA write, fill in and append 410138c8a9a5SSteve French * smbd_buffer_descriptor_v1 to the end of read request 410238c8a9a5SSteve French */ 410338c8a9a5SSteve French if (smb3_use_rdma_offload(io_parms)) { 410438c8a9a5SSteve French struct smbd_buffer_descriptor_v1 *v1; 410538c8a9a5SSteve French bool need_invalidate = server->dialect == SMB30_PROT_ID; 410638c8a9a5SSteve French 410738c8a9a5SSteve French rdata->mr = smbd_register_mr(server->smbd_conn, &rdata->iter, 410838c8a9a5SSteve French true, need_invalidate); 410938c8a9a5SSteve French if (!rdata->mr) 411038c8a9a5SSteve French return -EAGAIN; 411138c8a9a5SSteve French 411238c8a9a5SSteve French req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE; 411338c8a9a5SSteve French if (need_invalidate) 411438c8a9a5SSteve French req->Channel = SMB2_CHANNEL_RDMA_V1; 411538c8a9a5SSteve French req->ReadChannelInfoOffset = 411638c8a9a5SSteve French cpu_to_le16(offsetof(struct smb2_read_req, Buffer)); 411738c8a9a5SSteve French req->ReadChannelInfoLength = 411838c8a9a5SSteve French cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1)); 411938c8a9a5SSteve French v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0]; 412038c8a9a5SSteve French v1->offset = cpu_to_le64(rdata->mr->mr->iova); 412138c8a9a5SSteve French v1->token = cpu_to_le32(rdata->mr->mr->rkey); 412238c8a9a5SSteve French v1->length = cpu_to_le32(rdata->mr->mr->length); 412338c8a9a5SSteve French 412438c8a9a5SSteve French *total_len += sizeof(*v1) - 1; 412538c8a9a5SSteve French } 412638c8a9a5SSteve French #endif 412738c8a9a5SSteve French if (request_type & CHAINED_REQUEST) { 412838c8a9a5SSteve French if (!(request_type & END_OF_CHAIN)) { 412938c8a9a5SSteve French /* next 8-byte aligned request */ 413038c8a9a5SSteve French *total_len = ALIGN(*total_len, 8); 413138c8a9a5SSteve French shdr->NextCommand = cpu_to_le32(*total_len); 413238c8a9a5SSteve French } else /* END_OF_CHAIN */ 413338c8a9a5SSteve French shdr->NextCommand = 0; 413438c8a9a5SSteve French if (request_type & RELATED_REQUEST) { 413538c8a9a5SSteve French shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS; 413638c8a9a5SSteve French /* 413738c8a9a5SSteve French * Related requests use info from previous read request 413838c8a9a5SSteve French * in chain. 413938c8a9a5SSteve French */ 414038c8a9a5SSteve French shdr->SessionId = cpu_to_le64(0xFFFFFFFFFFFFFFFF); 414138c8a9a5SSteve French shdr->Id.SyncId.TreeId = cpu_to_le32(0xFFFFFFFF); 414238c8a9a5SSteve French req->PersistentFileId = (u64)-1; 414338c8a9a5SSteve French req->VolatileFileId = (u64)-1; 414438c8a9a5SSteve French } 414538c8a9a5SSteve French } 414638c8a9a5SSteve French if (remaining_bytes > io_parms->length) 414738c8a9a5SSteve French req->RemainingBytes = cpu_to_le32(remaining_bytes); 414838c8a9a5SSteve French else 414938c8a9a5SSteve French req->RemainingBytes = 0; 415038c8a9a5SSteve French 415138c8a9a5SSteve French *buf = req; 415238c8a9a5SSteve French return rc; 415338c8a9a5SSteve French } 415438c8a9a5SSteve French 415538c8a9a5SSteve French static void 415638c8a9a5SSteve French smb2_readv_callback(struct mid_q_entry *mid) 415738c8a9a5SSteve French { 415838c8a9a5SSteve French struct cifs_readdata *rdata = mid->callback_data; 415938c8a9a5SSteve French struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); 416038c8a9a5SSteve French struct TCP_Server_Info *server = rdata->server; 416138c8a9a5SSteve French struct smb2_hdr *shdr = 416238c8a9a5SSteve French (struct smb2_hdr *)rdata->iov[0].iov_base; 416338c8a9a5SSteve French struct cifs_credits credits = { .value = 0, .instance = 0 }; 416438c8a9a5SSteve French struct smb_rqst rqst = { .rq_iov = &rdata->iov[1], .rq_nvec = 1 }; 416538c8a9a5SSteve French 416638c8a9a5SSteve French if (rdata->got_bytes) { 416738c8a9a5SSteve French rqst.rq_iter = rdata->iter; 416838c8a9a5SSteve French rqst.rq_iter_size = iov_iter_count(&rdata->iter); 416938c8a9a5SSteve French } 417038c8a9a5SSteve French 417138c8a9a5SSteve French WARN_ONCE(rdata->server != mid->server, 417238c8a9a5SSteve French "rdata server %p != mid server %p", 417338c8a9a5SSteve French rdata->server, mid->server); 417438c8a9a5SSteve French 417538c8a9a5SSteve French cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n", 417638c8a9a5SSteve French __func__, mid->mid, mid->mid_state, rdata->result, 417738c8a9a5SSteve French rdata->bytes); 417838c8a9a5SSteve French 417938c8a9a5SSteve French switch (mid->mid_state) { 418038c8a9a5SSteve French case MID_RESPONSE_RECEIVED: 418138c8a9a5SSteve French credits.value = le16_to_cpu(shdr->CreditRequest); 418238c8a9a5SSteve French credits.instance = server->reconnect_instance; 418338c8a9a5SSteve French /* result already set, check signature */ 418438c8a9a5SSteve French if (server->sign && !mid->decrypted) { 418538c8a9a5SSteve French int rc; 418638c8a9a5SSteve French 418738c8a9a5SSteve French iov_iter_revert(&rqst.rq_iter, rdata->got_bytes); 418838c8a9a5SSteve French iov_iter_truncate(&rqst.rq_iter, rdata->got_bytes); 418938c8a9a5SSteve French rc = smb2_verify_signature(&rqst, server); 419038c8a9a5SSteve French if (rc) 419138c8a9a5SSteve French cifs_tcon_dbg(VFS, "SMB signature verification returned error = %d\n", 419238c8a9a5SSteve French rc); 419338c8a9a5SSteve French } 419438c8a9a5SSteve French /* FIXME: should this be counted toward the initiating task? */ 419538c8a9a5SSteve French task_io_account_read(rdata->got_bytes); 419638c8a9a5SSteve French cifs_stats_bytes_read(tcon, rdata->got_bytes); 419738c8a9a5SSteve French break; 419838c8a9a5SSteve French case MID_REQUEST_SUBMITTED: 419938c8a9a5SSteve French case MID_RETRY_NEEDED: 420038c8a9a5SSteve French rdata->result = -EAGAIN; 420138c8a9a5SSteve French if (server->sign && rdata->got_bytes) 420238c8a9a5SSteve French /* reset bytes number since we can not check a sign */ 420338c8a9a5SSteve French rdata->got_bytes = 0; 420438c8a9a5SSteve French /* FIXME: should this be counted toward the initiating task? */ 420538c8a9a5SSteve French task_io_account_read(rdata->got_bytes); 420638c8a9a5SSteve French cifs_stats_bytes_read(tcon, rdata->got_bytes); 420738c8a9a5SSteve French break; 420838c8a9a5SSteve French case MID_RESPONSE_MALFORMED: 420938c8a9a5SSteve French credits.value = le16_to_cpu(shdr->CreditRequest); 421038c8a9a5SSteve French credits.instance = server->reconnect_instance; 421138c8a9a5SSteve French fallthrough; 421238c8a9a5SSteve French default: 421338c8a9a5SSteve French rdata->result = -EIO; 421438c8a9a5SSteve French } 421538c8a9a5SSteve French #ifdef CONFIG_CIFS_SMB_DIRECT 421638c8a9a5SSteve French /* 421738c8a9a5SSteve French * If this rdata has a memmory registered, the MR can be freed 421838c8a9a5SSteve French * MR needs to be freed as soon as I/O finishes to prevent deadlock 421938c8a9a5SSteve French * because they have limited number and are used for future I/Os 422038c8a9a5SSteve French */ 422138c8a9a5SSteve French if (rdata->mr) { 422238c8a9a5SSteve French smbd_deregister_mr(rdata->mr); 422338c8a9a5SSteve French rdata->mr = NULL; 422438c8a9a5SSteve French } 422538c8a9a5SSteve French #endif 422638c8a9a5SSteve French if (rdata->result && rdata->result != -ENODATA) { 422738c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_READ_HE); 422838c8a9a5SSteve French trace_smb3_read_err(0 /* xid */, 422938c8a9a5SSteve French rdata->cfile->fid.persistent_fid, 423038c8a9a5SSteve French tcon->tid, tcon->ses->Suid, rdata->offset, 423138c8a9a5SSteve French rdata->bytes, rdata->result); 423238c8a9a5SSteve French } else 423338c8a9a5SSteve French trace_smb3_read_done(0 /* xid */, 423438c8a9a5SSteve French rdata->cfile->fid.persistent_fid, 423538c8a9a5SSteve French tcon->tid, tcon->ses->Suid, 423638c8a9a5SSteve French rdata->offset, rdata->got_bytes); 423738c8a9a5SSteve French 423838c8a9a5SSteve French queue_work(cifsiod_wq, &rdata->work); 423938c8a9a5SSteve French release_mid(mid); 424038c8a9a5SSteve French add_credits(server, &credits, 0); 424138c8a9a5SSteve French } 424238c8a9a5SSteve French 424338c8a9a5SSteve French /* smb2_async_readv - send an async read, and set up mid to handle result */ 424438c8a9a5SSteve French int 424538c8a9a5SSteve French smb2_async_readv(struct cifs_readdata *rdata) 424638c8a9a5SSteve French { 424738c8a9a5SSteve French int rc, flags = 0; 424838c8a9a5SSteve French char *buf; 424938c8a9a5SSteve French struct smb2_hdr *shdr; 425038c8a9a5SSteve French struct cifs_io_parms io_parms; 425138c8a9a5SSteve French struct smb_rqst rqst = { .rq_iov = rdata->iov, 425238c8a9a5SSteve French .rq_nvec = 1 }; 425338c8a9a5SSteve French struct TCP_Server_Info *server; 425438c8a9a5SSteve French struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); 425538c8a9a5SSteve French unsigned int total_len; 42565e90aa21SShyam Prasad N int credit_request; 425738c8a9a5SSteve French 425838c8a9a5SSteve French cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n", 425938c8a9a5SSteve French __func__, rdata->offset, rdata->bytes); 426038c8a9a5SSteve French 426138c8a9a5SSteve French if (!rdata->server) 426238c8a9a5SSteve French rdata->server = cifs_pick_channel(tcon->ses); 426338c8a9a5SSteve French 426438c8a9a5SSteve French io_parms.tcon = tlink_tcon(rdata->cfile->tlink); 426538c8a9a5SSteve French io_parms.server = server = rdata->server; 426638c8a9a5SSteve French io_parms.offset = rdata->offset; 426738c8a9a5SSteve French io_parms.length = rdata->bytes; 426838c8a9a5SSteve French io_parms.persistent_fid = rdata->cfile->fid.persistent_fid; 426938c8a9a5SSteve French io_parms.volatile_fid = rdata->cfile->fid.volatile_fid; 427038c8a9a5SSteve French io_parms.pid = rdata->pid; 427138c8a9a5SSteve French 427238c8a9a5SSteve French rc = smb2_new_read_req( 427338c8a9a5SSteve French (void **) &buf, &total_len, &io_parms, rdata, 0, 0); 427438c8a9a5SSteve French if (rc) 427538c8a9a5SSteve French return rc; 427638c8a9a5SSteve French 427738c8a9a5SSteve French if (smb3_encryption_required(io_parms.tcon)) 427838c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 427938c8a9a5SSteve French 428038c8a9a5SSteve French rdata->iov[0].iov_base = buf; 428138c8a9a5SSteve French rdata->iov[0].iov_len = total_len; 428238c8a9a5SSteve French 428338c8a9a5SSteve French shdr = (struct smb2_hdr *)buf; 428438c8a9a5SSteve French 428538c8a9a5SSteve French if (rdata->credits.value > 0) { 428638c8a9a5SSteve French shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes, 428738c8a9a5SSteve French SMB2_MAX_BUFFER_SIZE)); 42885e90aa21SShyam Prasad N credit_request = le16_to_cpu(shdr->CreditCharge) + 8; 42895e90aa21SShyam Prasad N if (server->credits >= server->max_credits) 42905e90aa21SShyam Prasad N shdr->CreditRequest = cpu_to_le16(0); 42915e90aa21SShyam Prasad N else 42925e90aa21SShyam Prasad N shdr->CreditRequest = cpu_to_le16( 42935e90aa21SShyam Prasad N min_t(int, server->max_credits - 42945e90aa21SShyam Prasad N server->credits, credit_request)); 429538c8a9a5SSteve French 429638c8a9a5SSteve French rc = adjust_credits(server, &rdata->credits, rdata->bytes); 429738c8a9a5SSteve French if (rc) 429838c8a9a5SSteve French goto async_readv_out; 429938c8a9a5SSteve French 430038c8a9a5SSteve French flags |= CIFS_HAS_CREDITS; 430138c8a9a5SSteve French } 430238c8a9a5SSteve French 430338c8a9a5SSteve French kref_get(&rdata->refcount); 430438c8a9a5SSteve French rc = cifs_call_async(server, &rqst, 430538c8a9a5SSteve French cifs_readv_receive, smb2_readv_callback, 430638c8a9a5SSteve French smb3_handle_read_data, rdata, flags, 430738c8a9a5SSteve French &rdata->credits); 430838c8a9a5SSteve French if (rc) { 430938c8a9a5SSteve French kref_put(&rdata->refcount, cifs_readdata_release); 431038c8a9a5SSteve French cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE); 431138c8a9a5SSteve French trace_smb3_read_err(0 /* xid */, io_parms.persistent_fid, 431238c8a9a5SSteve French io_parms.tcon->tid, 431338c8a9a5SSteve French io_parms.tcon->ses->Suid, 431438c8a9a5SSteve French io_parms.offset, io_parms.length, rc); 431538c8a9a5SSteve French } 431638c8a9a5SSteve French 431738c8a9a5SSteve French async_readv_out: 431838c8a9a5SSteve French cifs_small_buf_release(buf); 431938c8a9a5SSteve French return rc; 432038c8a9a5SSteve French } 432138c8a9a5SSteve French 432238c8a9a5SSteve French int 432338c8a9a5SSteve French SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms, 432438c8a9a5SSteve French unsigned int *nbytes, char **buf, int *buf_type) 432538c8a9a5SSteve French { 432638c8a9a5SSteve French struct smb_rqst rqst; 432738c8a9a5SSteve French int resp_buftype, rc; 432838c8a9a5SSteve French struct smb2_read_req *req = NULL; 432938c8a9a5SSteve French struct smb2_read_rsp *rsp = NULL; 433038c8a9a5SSteve French struct kvec iov[1]; 433138c8a9a5SSteve French struct kvec rsp_iov; 433238c8a9a5SSteve French unsigned int total_len; 433338c8a9a5SSteve French int flags = CIFS_LOG_ERROR; 433438c8a9a5SSteve French struct cifs_ses *ses = io_parms->tcon->ses; 433538c8a9a5SSteve French 433638c8a9a5SSteve French if (!io_parms->server) 433738c8a9a5SSteve French io_parms->server = cifs_pick_channel(io_parms->tcon->ses); 433838c8a9a5SSteve French 433938c8a9a5SSteve French *nbytes = 0; 434038c8a9a5SSteve French rc = smb2_new_read_req((void **)&req, &total_len, io_parms, NULL, 0, 0); 434138c8a9a5SSteve French if (rc) 434238c8a9a5SSteve French return rc; 434338c8a9a5SSteve French 434438c8a9a5SSteve French if (smb3_encryption_required(io_parms->tcon)) 434538c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 434638c8a9a5SSteve French 434738c8a9a5SSteve French iov[0].iov_base = (char *)req; 434838c8a9a5SSteve French iov[0].iov_len = total_len; 434938c8a9a5SSteve French 435038c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 435138c8a9a5SSteve French rqst.rq_iov = iov; 435238c8a9a5SSteve French rqst.rq_nvec = 1; 435338c8a9a5SSteve French 435438c8a9a5SSteve French rc = cifs_send_recv(xid, ses, io_parms->server, 435538c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 435638c8a9a5SSteve French rsp = (struct smb2_read_rsp *)rsp_iov.iov_base; 435738c8a9a5SSteve French 435838c8a9a5SSteve French if (rc) { 435938c8a9a5SSteve French if (rc != -ENODATA) { 436038c8a9a5SSteve French cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE); 436138c8a9a5SSteve French cifs_dbg(VFS, "Send error in read = %d\n", rc); 436238c8a9a5SSteve French trace_smb3_read_err(xid, 436338c8a9a5SSteve French req->PersistentFileId, 436438c8a9a5SSteve French io_parms->tcon->tid, ses->Suid, 436538c8a9a5SSteve French io_parms->offset, io_parms->length, 436638c8a9a5SSteve French rc); 436738c8a9a5SSteve French } else 436838c8a9a5SSteve French trace_smb3_read_done(xid, req->PersistentFileId, io_parms->tcon->tid, 436938c8a9a5SSteve French ses->Suid, io_parms->offset, 0); 437038c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp_iov.iov_base); 437138c8a9a5SSteve French cifs_small_buf_release(req); 437238c8a9a5SSteve French return rc == -ENODATA ? 0 : rc; 437338c8a9a5SSteve French } else 437438c8a9a5SSteve French trace_smb3_read_done(xid, 437538c8a9a5SSteve French req->PersistentFileId, 437638c8a9a5SSteve French io_parms->tcon->tid, ses->Suid, 437738c8a9a5SSteve French io_parms->offset, io_parms->length); 437838c8a9a5SSteve French 437938c8a9a5SSteve French cifs_small_buf_release(req); 438038c8a9a5SSteve French 438138c8a9a5SSteve French *nbytes = le32_to_cpu(rsp->DataLength); 438238c8a9a5SSteve French if ((*nbytes > CIFS_MAX_MSGSIZE) || 438338c8a9a5SSteve French (*nbytes > io_parms->length)) { 438438c8a9a5SSteve French cifs_dbg(FYI, "bad length %d for count %d\n", 438538c8a9a5SSteve French *nbytes, io_parms->length); 438638c8a9a5SSteve French rc = -EIO; 438738c8a9a5SSteve French *nbytes = 0; 438838c8a9a5SSteve French } 438938c8a9a5SSteve French 439038c8a9a5SSteve French if (*buf) { 439138c8a9a5SSteve French memcpy(*buf, (char *)rsp + rsp->DataOffset, *nbytes); 439238c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp_iov.iov_base); 439338c8a9a5SSteve French } else if (resp_buftype != CIFS_NO_BUFFER) { 439438c8a9a5SSteve French *buf = rsp_iov.iov_base; 439538c8a9a5SSteve French if (resp_buftype == CIFS_SMALL_BUFFER) 439638c8a9a5SSteve French *buf_type = CIFS_SMALL_BUFFER; 439738c8a9a5SSteve French else if (resp_buftype == CIFS_LARGE_BUFFER) 439838c8a9a5SSteve French *buf_type = CIFS_LARGE_BUFFER; 439938c8a9a5SSteve French } 440038c8a9a5SSteve French return rc; 440138c8a9a5SSteve French } 440238c8a9a5SSteve French 440338c8a9a5SSteve French /* 440438c8a9a5SSteve French * Check the mid_state and signature on received buffer (if any), and queue the 440538c8a9a5SSteve French * workqueue completion task. 440638c8a9a5SSteve French */ 440738c8a9a5SSteve French static void 440838c8a9a5SSteve French smb2_writev_callback(struct mid_q_entry *mid) 440938c8a9a5SSteve French { 441038c8a9a5SSteve French struct cifs_writedata *wdata = mid->callback_data; 441138c8a9a5SSteve French struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); 441238c8a9a5SSteve French struct TCP_Server_Info *server = wdata->server; 441338c8a9a5SSteve French unsigned int written; 441438c8a9a5SSteve French struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf; 441538c8a9a5SSteve French struct cifs_credits credits = { .value = 0, .instance = 0 }; 441638c8a9a5SSteve French 441738c8a9a5SSteve French WARN_ONCE(wdata->server != mid->server, 441838c8a9a5SSteve French "wdata server %p != mid server %p", 441938c8a9a5SSteve French wdata->server, mid->server); 442038c8a9a5SSteve French 442138c8a9a5SSteve French switch (mid->mid_state) { 442238c8a9a5SSteve French case MID_RESPONSE_RECEIVED: 442338c8a9a5SSteve French credits.value = le16_to_cpu(rsp->hdr.CreditRequest); 442438c8a9a5SSteve French credits.instance = server->reconnect_instance; 442538c8a9a5SSteve French wdata->result = smb2_check_receive(mid, server, 0); 442638c8a9a5SSteve French if (wdata->result != 0) 442738c8a9a5SSteve French break; 442838c8a9a5SSteve French 442938c8a9a5SSteve French written = le32_to_cpu(rsp->DataLength); 443038c8a9a5SSteve French /* 443138c8a9a5SSteve French * Mask off high 16 bits when bytes written as returned 443238c8a9a5SSteve French * by the server is greater than bytes requested by the 443338c8a9a5SSteve French * client. OS/2 servers are known to set incorrect 443438c8a9a5SSteve French * CountHigh values. 443538c8a9a5SSteve French */ 443638c8a9a5SSteve French if (written > wdata->bytes) 443738c8a9a5SSteve French written &= 0xFFFF; 443838c8a9a5SSteve French 443938c8a9a5SSteve French if (written < wdata->bytes) 444038c8a9a5SSteve French wdata->result = -ENOSPC; 444138c8a9a5SSteve French else 444238c8a9a5SSteve French wdata->bytes = written; 444338c8a9a5SSteve French break; 444438c8a9a5SSteve French case MID_REQUEST_SUBMITTED: 444538c8a9a5SSteve French case MID_RETRY_NEEDED: 444638c8a9a5SSteve French wdata->result = -EAGAIN; 444738c8a9a5SSteve French break; 444838c8a9a5SSteve French case MID_RESPONSE_MALFORMED: 444938c8a9a5SSteve French credits.value = le16_to_cpu(rsp->hdr.CreditRequest); 445038c8a9a5SSteve French credits.instance = server->reconnect_instance; 445138c8a9a5SSteve French fallthrough; 445238c8a9a5SSteve French default: 445338c8a9a5SSteve French wdata->result = -EIO; 445438c8a9a5SSteve French break; 445538c8a9a5SSteve French } 445638c8a9a5SSteve French #ifdef CONFIG_CIFS_SMB_DIRECT 445738c8a9a5SSteve French /* 445838c8a9a5SSteve French * If this wdata has a memory registered, the MR can be freed 445938c8a9a5SSteve French * The number of MRs available is limited, it's important to recover 446038c8a9a5SSteve French * used MR as soon as I/O is finished. Hold MR longer in the later 446138c8a9a5SSteve French * I/O process can possibly result in I/O deadlock due to lack of MR 446238c8a9a5SSteve French * to send request on I/O retry 446338c8a9a5SSteve French */ 446438c8a9a5SSteve French if (wdata->mr) { 446538c8a9a5SSteve French smbd_deregister_mr(wdata->mr); 446638c8a9a5SSteve French wdata->mr = NULL; 446738c8a9a5SSteve French } 446838c8a9a5SSteve French #endif 446938c8a9a5SSteve French if (wdata->result) { 447038c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); 447138c8a9a5SSteve French trace_smb3_write_err(0 /* no xid */, 447238c8a9a5SSteve French wdata->cfile->fid.persistent_fid, 447338c8a9a5SSteve French tcon->tid, tcon->ses->Suid, wdata->offset, 447438c8a9a5SSteve French wdata->bytes, wdata->result); 447538c8a9a5SSteve French if (wdata->result == -ENOSPC) 447638c8a9a5SSteve French pr_warn_once("Out of space writing to %s\n", 447738c8a9a5SSteve French tcon->tree_name); 447838c8a9a5SSteve French } else 447938c8a9a5SSteve French trace_smb3_write_done(0 /* no xid */, 448038c8a9a5SSteve French wdata->cfile->fid.persistent_fid, 448138c8a9a5SSteve French tcon->tid, tcon->ses->Suid, 448238c8a9a5SSteve French wdata->offset, wdata->bytes); 448338c8a9a5SSteve French 448438c8a9a5SSteve French queue_work(cifsiod_wq, &wdata->work); 448538c8a9a5SSteve French release_mid(mid); 448638c8a9a5SSteve French add_credits(server, &credits, 0); 448738c8a9a5SSteve French } 448838c8a9a5SSteve French 448938c8a9a5SSteve French /* smb2_async_writev - send an async write, and set up mid to handle result */ 449038c8a9a5SSteve French int 449138c8a9a5SSteve French smb2_async_writev(struct cifs_writedata *wdata, 449238c8a9a5SSteve French void (*release)(struct kref *kref)) 449338c8a9a5SSteve French { 449438c8a9a5SSteve French int rc = -EACCES, flags = 0; 449538c8a9a5SSteve French struct smb2_write_req *req = NULL; 449638c8a9a5SSteve French struct smb2_hdr *shdr; 449738c8a9a5SSteve French struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); 449838c8a9a5SSteve French struct TCP_Server_Info *server = wdata->server; 449938c8a9a5SSteve French struct kvec iov[1]; 450038c8a9a5SSteve French struct smb_rqst rqst = { }; 450138c8a9a5SSteve French unsigned int total_len; 450238c8a9a5SSteve French struct cifs_io_parms _io_parms; 450338c8a9a5SSteve French struct cifs_io_parms *io_parms = NULL; 45045e90aa21SShyam Prasad N int credit_request; 450538c8a9a5SSteve French 450638c8a9a5SSteve French if (!wdata->server) 450738c8a9a5SSteve French server = wdata->server = cifs_pick_channel(tcon->ses); 450838c8a9a5SSteve French 450938c8a9a5SSteve French /* 451038c8a9a5SSteve French * in future we may get cifs_io_parms passed in from the caller, 451138c8a9a5SSteve French * but for now we construct it here... 451238c8a9a5SSteve French */ 451338c8a9a5SSteve French _io_parms = (struct cifs_io_parms) { 451438c8a9a5SSteve French .tcon = tcon, 451538c8a9a5SSteve French .server = server, 451638c8a9a5SSteve French .offset = wdata->offset, 451738c8a9a5SSteve French .length = wdata->bytes, 451838c8a9a5SSteve French .persistent_fid = wdata->cfile->fid.persistent_fid, 451938c8a9a5SSteve French .volatile_fid = wdata->cfile->fid.volatile_fid, 452038c8a9a5SSteve French .pid = wdata->pid, 452138c8a9a5SSteve French }; 452238c8a9a5SSteve French io_parms = &_io_parms; 452338c8a9a5SSteve French 452438c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_WRITE, tcon, server, 452538c8a9a5SSteve French (void **) &req, &total_len); 452638c8a9a5SSteve French if (rc) 452738c8a9a5SSteve French return rc; 452838c8a9a5SSteve French 452938c8a9a5SSteve French if (smb3_encryption_required(tcon)) 453038c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 453138c8a9a5SSteve French 453238c8a9a5SSteve French shdr = (struct smb2_hdr *)req; 453338c8a9a5SSteve French shdr->Id.SyncId.ProcessId = cpu_to_le32(io_parms->pid); 453438c8a9a5SSteve French 453538c8a9a5SSteve French req->PersistentFileId = io_parms->persistent_fid; 453638c8a9a5SSteve French req->VolatileFileId = io_parms->volatile_fid; 453738c8a9a5SSteve French req->WriteChannelInfoOffset = 0; 453838c8a9a5SSteve French req->WriteChannelInfoLength = 0; 453938c8a9a5SSteve French req->Channel = SMB2_CHANNEL_NONE; 454038c8a9a5SSteve French req->Offset = cpu_to_le64(io_parms->offset); 454138c8a9a5SSteve French req->DataOffset = cpu_to_le16( 454238c8a9a5SSteve French offsetof(struct smb2_write_req, Buffer)); 454338c8a9a5SSteve French req->RemainingBytes = 0; 454438c8a9a5SSteve French 454538c8a9a5SSteve French trace_smb3_write_enter(0 /* xid */, 454638c8a9a5SSteve French io_parms->persistent_fid, 454738c8a9a5SSteve French io_parms->tcon->tid, 454838c8a9a5SSteve French io_parms->tcon->ses->Suid, 454938c8a9a5SSteve French io_parms->offset, 455038c8a9a5SSteve French io_parms->length); 455138c8a9a5SSteve French 455238c8a9a5SSteve French #ifdef CONFIG_CIFS_SMB_DIRECT 455338c8a9a5SSteve French /* 455438c8a9a5SSteve French * If we want to do a server RDMA read, fill in and append 455538c8a9a5SSteve French * smbd_buffer_descriptor_v1 to the end of write request 455638c8a9a5SSteve French */ 455738c8a9a5SSteve French if (smb3_use_rdma_offload(io_parms)) { 455838c8a9a5SSteve French struct smbd_buffer_descriptor_v1 *v1; 455938c8a9a5SSteve French size_t data_size = iov_iter_count(&wdata->iter); 456038c8a9a5SSteve French bool need_invalidate = server->dialect == SMB30_PROT_ID; 456138c8a9a5SSteve French 456238c8a9a5SSteve French wdata->mr = smbd_register_mr(server->smbd_conn, &wdata->iter, 456338c8a9a5SSteve French false, need_invalidate); 456438c8a9a5SSteve French if (!wdata->mr) { 456538c8a9a5SSteve French rc = -EAGAIN; 456638c8a9a5SSteve French goto async_writev_out; 456738c8a9a5SSteve French } 456838c8a9a5SSteve French req->Length = 0; 456938c8a9a5SSteve French req->DataOffset = 0; 457038c8a9a5SSteve French req->RemainingBytes = cpu_to_le32(data_size); 457138c8a9a5SSteve French req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE; 457238c8a9a5SSteve French if (need_invalidate) 457338c8a9a5SSteve French req->Channel = SMB2_CHANNEL_RDMA_V1; 457438c8a9a5SSteve French req->WriteChannelInfoOffset = 457538c8a9a5SSteve French cpu_to_le16(offsetof(struct smb2_write_req, Buffer)); 457638c8a9a5SSteve French req->WriteChannelInfoLength = 457738c8a9a5SSteve French cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1)); 457838c8a9a5SSteve French v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0]; 457938c8a9a5SSteve French v1->offset = cpu_to_le64(wdata->mr->mr->iova); 458038c8a9a5SSteve French v1->token = cpu_to_le32(wdata->mr->mr->rkey); 458138c8a9a5SSteve French v1->length = cpu_to_le32(wdata->mr->mr->length); 458238c8a9a5SSteve French } 458338c8a9a5SSteve French #endif 458438c8a9a5SSteve French iov[0].iov_len = total_len - 1; 458538c8a9a5SSteve French iov[0].iov_base = (char *)req; 458638c8a9a5SSteve French 458738c8a9a5SSteve French rqst.rq_iov = iov; 458838c8a9a5SSteve French rqst.rq_nvec = 1; 458938c8a9a5SSteve French rqst.rq_iter = wdata->iter; 459038c8a9a5SSteve French rqst.rq_iter_size = iov_iter_count(&rqst.rq_iter); 459138c8a9a5SSteve French #ifdef CONFIG_CIFS_SMB_DIRECT 459238c8a9a5SSteve French if (wdata->mr) 459338c8a9a5SSteve French iov[0].iov_len += sizeof(struct smbd_buffer_descriptor_v1); 459438c8a9a5SSteve French #endif 459538c8a9a5SSteve French cifs_dbg(FYI, "async write at %llu %u bytes iter=%zx\n", 459638c8a9a5SSteve French io_parms->offset, io_parms->length, iov_iter_count(&rqst.rq_iter)); 459738c8a9a5SSteve French 459838c8a9a5SSteve French #ifdef CONFIG_CIFS_SMB_DIRECT 459938c8a9a5SSteve French /* For RDMA read, I/O size is in RemainingBytes not in Length */ 460038c8a9a5SSteve French if (!wdata->mr) 460138c8a9a5SSteve French req->Length = cpu_to_le32(io_parms->length); 460238c8a9a5SSteve French #else 460338c8a9a5SSteve French req->Length = cpu_to_le32(io_parms->length); 460438c8a9a5SSteve French #endif 460538c8a9a5SSteve French 460638c8a9a5SSteve French if (wdata->credits.value > 0) { 460738c8a9a5SSteve French shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes, 460838c8a9a5SSteve French SMB2_MAX_BUFFER_SIZE)); 46095e90aa21SShyam Prasad N credit_request = le16_to_cpu(shdr->CreditCharge) + 8; 46105e90aa21SShyam Prasad N if (server->credits >= server->max_credits) 46115e90aa21SShyam Prasad N shdr->CreditRequest = cpu_to_le16(0); 46125e90aa21SShyam Prasad N else 46135e90aa21SShyam Prasad N shdr->CreditRequest = cpu_to_le16( 46145e90aa21SShyam Prasad N min_t(int, server->max_credits - 46155e90aa21SShyam Prasad N server->credits, credit_request)); 461638c8a9a5SSteve French 461738c8a9a5SSteve French rc = adjust_credits(server, &wdata->credits, io_parms->length); 461838c8a9a5SSteve French if (rc) 461938c8a9a5SSteve French goto async_writev_out; 462038c8a9a5SSteve French 462138c8a9a5SSteve French flags |= CIFS_HAS_CREDITS; 462238c8a9a5SSteve French } 462338c8a9a5SSteve French 462438c8a9a5SSteve French kref_get(&wdata->refcount); 462538c8a9a5SSteve French rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL, 462638c8a9a5SSteve French wdata, flags, &wdata->credits); 462738c8a9a5SSteve French 462838c8a9a5SSteve French if (rc) { 462938c8a9a5SSteve French trace_smb3_write_err(0 /* no xid */, 463038c8a9a5SSteve French io_parms->persistent_fid, 463138c8a9a5SSteve French io_parms->tcon->tid, 463238c8a9a5SSteve French io_parms->tcon->ses->Suid, 463338c8a9a5SSteve French io_parms->offset, 463438c8a9a5SSteve French io_parms->length, 463538c8a9a5SSteve French rc); 463638c8a9a5SSteve French kref_put(&wdata->refcount, release); 463738c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); 463838c8a9a5SSteve French } 463938c8a9a5SSteve French 464038c8a9a5SSteve French async_writev_out: 464138c8a9a5SSteve French cifs_small_buf_release(req); 464238c8a9a5SSteve French return rc; 464338c8a9a5SSteve French } 464438c8a9a5SSteve French 464538c8a9a5SSteve French /* 464638c8a9a5SSteve French * SMB2_write function gets iov pointer to kvec array with n_vec as a length. 464738c8a9a5SSteve French * The length field from io_parms must be at least 1 and indicates a number of 464838c8a9a5SSteve French * elements with data to write that begins with position 1 in iov array. All 464938c8a9a5SSteve French * data length is specified by count. 465038c8a9a5SSteve French */ 465138c8a9a5SSteve French int 465238c8a9a5SSteve French SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms, 465338c8a9a5SSteve French unsigned int *nbytes, struct kvec *iov, int n_vec) 465438c8a9a5SSteve French { 465538c8a9a5SSteve French struct smb_rqst rqst; 465638c8a9a5SSteve French int rc = 0; 465738c8a9a5SSteve French struct smb2_write_req *req = NULL; 465838c8a9a5SSteve French struct smb2_write_rsp *rsp = NULL; 465938c8a9a5SSteve French int resp_buftype; 466038c8a9a5SSteve French struct kvec rsp_iov; 466138c8a9a5SSteve French int flags = 0; 466238c8a9a5SSteve French unsigned int total_len; 466338c8a9a5SSteve French struct TCP_Server_Info *server; 466438c8a9a5SSteve French 466538c8a9a5SSteve French *nbytes = 0; 466638c8a9a5SSteve French 466738c8a9a5SSteve French if (n_vec < 1) 466838c8a9a5SSteve French return rc; 466938c8a9a5SSteve French 467038c8a9a5SSteve French if (!io_parms->server) 467138c8a9a5SSteve French io_parms->server = cifs_pick_channel(io_parms->tcon->ses); 467238c8a9a5SSteve French server = io_parms->server; 467338c8a9a5SSteve French if (server == NULL) 467438c8a9a5SSteve French return -ECONNABORTED; 467538c8a9a5SSteve French 467638c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_WRITE, io_parms->tcon, server, 467738c8a9a5SSteve French (void **) &req, &total_len); 467838c8a9a5SSteve French if (rc) 467938c8a9a5SSteve French return rc; 468038c8a9a5SSteve French 468138c8a9a5SSteve French if (smb3_encryption_required(io_parms->tcon)) 468238c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 468338c8a9a5SSteve French 468438c8a9a5SSteve French req->hdr.Id.SyncId.ProcessId = cpu_to_le32(io_parms->pid); 468538c8a9a5SSteve French 468638c8a9a5SSteve French req->PersistentFileId = io_parms->persistent_fid; 468738c8a9a5SSteve French req->VolatileFileId = io_parms->volatile_fid; 468838c8a9a5SSteve French req->WriteChannelInfoOffset = 0; 468938c8a9a5SSteve French req->WriteChannelInfoLength = 0; 469038c8a9a5SSteve French req->Channel = 0; 469138c8a9a5SSteve French req->Length = cpu_to_le32(io_parms->length); 469238c8a9a5SSteve French req->Offset = cpu_to_le64(io_parms->offset); 469338c8a9a5SSteve French req->DataOffset = cpu_to_le16( 469438c8a9a5SSteve French offsetof(struct smb2_write_req, Buffer)); 469538c8a9a5SSteve French req->RemainingBytes = 0; 469638c8a9a5SSteve French 469738c8a9a5SSteve French trace_smb3_write_enter(xid, io_parms->persistent_fid, 469838c8a9a5SSteve French io_parms->tcon->tid, io_parms->tcon->ses->Suid, 469938c8a9a5SSteve French io_parms->offset, io_parms->length); 470038c8a9a5SSteve French 470138c8a9a5SSteve French iov[0].iov_base = (char *)req; 470238c8a9a5SSteve French /* 1 for Buffer */ 470338c8a9a5SSteve French iov[0].iov_len = total_len - 1; 470438c8a9a5SSteve French 470538c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 470638c8a9a5SSteve French rqst.rq_iov = iov; 470738c8a9a5SSteve French rqst.rq_nvec = n_vec + 1; 470838c8a9a5SSteve French 470938c8a9a5SSteve French rc = cifs_send_recv(xid, io_parms->tcon->ses, server, 471038c8a9a5SSteve French &rqst, 471138c8a9a5SSteve French &resp_buftype, flags, &rsp_iov); 471238c8a9a5SSteve French rsp = (struct smb2_write_rsp *)rsp_iov.iov_base; 471338c8a9a5SSteve French 471438c8a9a5SSteve French if (rc) { 471538c8a9a5SSteve French trace_smb3_write_err(xid, 471638c8a9a5SSteve French req->PersistentFileId, 471738c8a9a5SSteve French io_parms->tcon->tid, 471838c8a9a5SSteve French io_parms->tcon->ses->Suid, 471938c8a9a5SSteve French io_parms->offset, io_parms->length, rc); 472038c8a9a5SSteve French cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE); 472138c8a9a5SSteve French cifs_dbg(VFS, "Send error in write = %d\n", rc); 472238c8a9a5SSteve French } else { 472338c8a9a5SSteve French *nbytes = le32_to_cpu(rsp->DataLength); 472438c8a9a5SSteve French trace_smb3_write_done(xid, 472538c8a9a5SSteve French req->PersistentFileId, 472638c8a9a5SSteve French io_parms->tcon->tid, 472738c8a9a5SSteve French io_parms->tcon->ses->Suid, 472838c8a9a5SSteve French io_parms->offset, *nbytes); 472938c8a9a5SSteve French } 473038c8a9a5SSteve French 473138c8a9a5SSteve French cifs_small_buf_release(req); 473238c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp); 473338c8a9a5SSteve French return rc; 473438c8a9a5SSteve French } 473538c8a9a5SSteve French 473638c8a9a5SSteve French int posix_info_sid_size(const void *beg, const void *end) 473738c8a9a5SSteve French { 473838c8a9a5SSteve French size_t subauth; 473938c8a9a5SSteve French int total; 474038c8a9a5SSteve French 474138c8a9a5SSteve French if (beg + 1 > end) 474238c8a9a5SSteve French return -1; 474338c8a9a5SSteve French 474438c8a9a5SSteve French subauth = *(u8 *)(beg+1); 474538c8a9a5SSteve French if (subauth < 1 || subauth > 15) 474638c8a9a5SSteve French return -1; 474738c8a9a5SSteve French 474838c8a9a5SSteve French total = 1 + 1 + 6 + 4*subauth; 474938c8a9a5SSteve French if (beg + total > end) 475038c8a9a5SSteve French return -1; 475138c8a9a5SSteve French 475238c8a9a5SSteve French return total; 475338c8a9a5SSteve French } 475438c8a9a5SSteve French 475538c8a9a5SSteve French int posix_info_parse(const void *beg, const void *end, 475638c8a9a5SSteve French struct smb2_posix_info_parsed *out) 475738c8a9a5SSteve French 475838c8a9a5SSteve French { 475938c8a9a5SSteve French int total_len = 0; 476038c8a9a5SSteve French int owner_len, group_len; 476138c8a9a5SSteve French int name_len; 476238c8a9a5SSteve French const void *owner_sid; 476338c8a9a5SSteve French const void *group_sid; 476438c8a9a5SSteve French const void *name; 476538c8a9a5SSteve French 476638c8a9a5SSteve French /* if no end bound given, assume payload to be correct */ 476738c8a9a5SSteve French if (!end) { 476838c8a9a5SSteve French const struct smb2_posix_info *p = beg; 476938c8a9a5SSteve French 477038c8a9a5SSteve French end = beg + le32_to_cpu(p->NextEntryOffset); 477138c8a9a5SSteve French /* last element will have a 0 offset, pick a sensible bound */ 477238c8a9a5SSteve French if (end == beg) 477338c8a9a5SSteve French end += 0xFFFF; 477438c8a9a5SSteve French } 477538c8a9a5SSteve French 477638c8a9a5SSteve French /* check base buf */ 477738c8a9a5SSteve French if (beg + sizeof(struct smb2_posix_info) > end) 477838c8a9a5SSteve French return -1; 477938c8a9a5SSteve French total_len = sizeof(struct smb2_posix_info); 478038c8a9a5SSteve French 478138c8a9a5SSteve French /* check owner sid */ 478238c8a9a5SSteve French owner_sid = beg + total_len; 478338c8a9a5SSteve French owner_len = posix_info_sid_size(owner_sid, end); 478438c8a9a5SSteve French if (owner_len < 0) 478538c8a9a5SSteve French return -1; 478638c8a9a5SSteve French total_len += owner_len; 478738c8a9a5SSteve French 478838c8a9a5SSteve French /* check group sid */ 478938c8a9a5SSteve French group_sid = beg + total_len; 479038c8a9a5SSteve French group_len = posix_info_sid_size(group_sid, end); 479138c8a9a5SSteve French if (group_len < 0) 479238c8a9a5SSteve French return -1; 479338c8a9a5SSteve French total_len += group_len; 479438c8a9a5SSteve French 479538c8a9a5SSteve French /* check name len */ 479638c8a9a5SSteve French if (beg + total_len + 4 > end) 479738c8a9a5SSteve French return -1; 479838c8a9a5SSteve French name_len = le32_to_cpu(*(__le32 *)(beg + total_len)); 479938c8a9a5SSteve French if (name_len < 1 || name_len > 0xFFFF) 480038c8a9a5SSteve French return -1; 480138c8a9a5SSteve French total_len += 4; 480238c8a9a5SSteve French 480338c8a9a5SSteve French /* check name */ 480438c8a9a5SSteve French name = beg + total_len; 480538c8a9a5SSteve French if (name + name_len > end) 480638c8a9a5SSteve French return -1; 480738c8a9a5SSteve French total_len += name_len; 480838c8a9a5SSteve French 480938c8a9a5SSteve French if (out) { 481038c8a9a5SSteve French out->base = beg; 481138c8a9a5SSteve French out->size = total_len; 481238c8a9a5SSteve French out->name_len = name_len; 481338c8a9a5SSteve French out->name = name; 481438c8a9a5SSteve French memcpy(&out->owner, owner_sid, owner_len); 481538c8a9a5SSteve French memcpy(&out->group, group_sid, group_len); 481638c8a9a5SSteve French } 481738c8a9a5SSteve French return total_len; 481838c8a9a5SSteve French } 481938c8a9a5SSteve French 482038c8a9a5SSteve French static int posix_info_extra_size(const void *beg, const void *end) 482138c8a9a5SSteve French { 482238c8a9a5SSteve French int len = posix_info_parse(beg, end, NULL); 482338c8a9a5SSteve French 482438c8a9a5SSteve French if (len < 0) 482538c8a9a5SSteve French return -1; 482638c8a9a5SSteve French return len - sizeof(struct smb2_posix_info); 482738c8a9a5SSteve French } 482838c8a9a5SSteve French 482938c8a9a5SSteve French static unsigned int 483038c8a9a5SSteve French num_entries(int infotype, char *bufstart, char *end_of_buf, char **lastentry, 483138c8a9a5SSteve French size_t size) 483238c8a9a5SSteve French { 483338c8a9a5SSteve French int len; 483438c8a9a5SSteve French unsigned int entrycount = 0; 483538c8a9a5SSteve French unsigned int next_offset = 0; 483638c8a9a5SSteve French char *entryptr; 483738c8a9a5SSteve French FILE_DIRECTORY_INFO *dir_info; 483838c8a9a5SSteve French 483938c8a9a5SSteve French if (bufstart == NULL) 484038c8a9a5SSteve French return 0; 484138c8a9a5SSteve French 484238c8a9a5SSteve French entryptr = bufstart; 484338c8a9a5SSteve French 484438c8a9a5SSteve French while (1) { 484538c8a9a5SSteve French if (entryptr + next_offset < entryptr || 484638c8a9a5SSteve French entryptr + next_offset > end_of_buf || 484738c8a9a5SSteve French entryptr + next_offset + size > end_of_buf) { 484838c8a9a5SSteve French cifs_dbg(VFS, "malformed search entry would overflow\n"); 484938c8a9a5SSteve French break; 485038c8a9a5SSteve French } 485138c8a9a5SSteve French 485238c8a9a5SSteve French entryptr = entryptr + next_offset; 485338c8a9a5SSteve French dir_info = (FILE_DIRECTORY_INFO *)entryptr; 485438c8a9a5SSteve French 485538c8a9a5SSteve French if (infotype == SMB_FIND_FILE_POSIX_INFO) 485638c8a9a5SSteve French len = posix_info_extra_size(entryptr, end_of_buf); 485738c8a9a5SSteve French else 485838c8a9a5SSteve French len = le32_to_cpu(dir_info->FileNameLength); 485938c8a9a5SSteve French 486038c8a9a5SSteve French if (len < 0 || 486138c8a9a5SSteve French entryptr + len < entryptr || 486238c8a9a5SSteve French entryptr + len > end_of_buf || 486338c8a9a5SSteve French entryptr + len + size > end_of_buf) { 486438c8a9a5SSteve French cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n", 486538c8a9a5SSteve French end_of_buf); 486638c8a9a5SSteve French break; 486738c8a9a5SSteve French } 486838c8a9a5SSteve French 486938c8a9a5SSteve French *lastentry = entryptr; 487038c8a9a5SSteve French entrycount++; 487138c8a9a5SSteve French 487238c8a9a5SSteve French next_offset = le32_to_cpu(dir_info->NextEntryOffset); 487338c8a9a5SSteve French if (!next_offset) 487438c8a9a5SSteve French break; 487538c8a9a5SSteve French } 487638c8a9a5SSteve French 487738c8a9a5SSteve French return entrycount; 487838c8a9a5SSteve French } 487938c8a9a5SSteve French 488038c8a9a5SSteve French /* 488138c8a9a5SSteve French * Readdir/FindFirst 488238c8a9a5SSteve French */ 488338c8a9a5SSteve French int SMB2_query_directory_init(const unsigned int xid, 488438c8a9a5SSteve French struct cifs_tcon *tcon, 488538c8a9a5SSteve French struct TCP_Server_Info *server, 488638c8a9a5SSteve French struct smb_rqst *rqst, 488738c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, 488838c8a9a5SSteve French int index, int info_level) 488938c8a9a5SSteve French { 489038c8a9a5SSteve French struct smb2_query_directory_req *req; 489138c8a9a5SSteve French unsigned char *bufptr; 489238c8a9a5SSteve French __le16 asteriks = cpu_to_le16('*'); 489338c8a9a5SSteve French unsigned int output_size = CIFSMaxBufSize - 489438c8a9a5SSteve French MAX_SMB2_CREATE_RESPONSE_SIZE - 489538c8a9a5SSteve French MAX_SMB2_CLOSE_RESPONSE_SIZE; 489638c8a9a5SSteve French unsigned int total_len; 489738c8a9a5SSteve French struct kvec *iov = rqst->rq_iov; 489838c8a9a5SSteve French int len, rc; 489938c8a9a5SSteve French 490038c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_QUERY_DIRECTORY, tcon, server, 490138c8a9a5SSteve French (void **) &req, &total_len); 490238c8a9a5SSteve French if (rc) 490338c8a9a5SSteve French return rc; 490438c8a9a5SSteve French 490538c8a9a5SSteve French switch (info_level) { 490638c8a9a5SSteve French case SMB_FIND_FILE_DIRECTORY_INFO: 490738c8a9a5SSteve French req->FileInformationClass = FILE_DIRECTORY_INFORMATION; 490838c8a9a5SSteve French break; 490938c8a9a5SSteve French case SMB_FIND_FILE_ID_FULL_DIR_INFO: 491038c8a9a5SSteve French req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION; 491138c8a9a5SSteve French break; 491238c8a9a5SSteve French case SMB_FIND_FILE_POSIX_INFO: 491338c8a9a5SSteve French req->FileInformationClass = SMB_FIND_FILE_POSIX_INFO; 491438c8a9a5SSteve French break; 491538c8a9a5SSteve French default: 491638c8a9a5SSteve French cifs_tcon_dbg(VFS, "info level %u isn't supported\n", 491738c8a9a5SSteve French info_level); 491838c8a9a5SSteve French return -EINVAL; 491938c8a9a5SSteve French } 492038c8a9a5SSteve French 492138c8a9a5SSteve French req->FileIndex = cpu_to_le32(index); 492238c8a9a5SSteve French req->PersistentFileId = persistent_fid; 492338c8a9a5SSteve French req->VolatileFileId = volatile_fid; 492438c8a9a5SSteve French 492538c8a9a5SSteve French len = 0x2; 492638c8a9a5SSteve French bufptr = req->Buffer; 492738c8a9a5SSteve French memcpy(bufptr, &asteriks, len); 492838c8a9a5SSteve French 492938c8a9a5SSteve French req->FileNameOffset = 493038c8a9a5SSteve French cpu_to_le16(sizeof(struct smb2_query_directory_req)); 493138c8a9a5SSteve French req->FileNameLength = cpu_to_le16(len); 493238c8a9a5SSteve French /* 493338c8a9a5SSteve French * BB could be 30 bytes or so longer if we used SMB2 specific 493438c8a9a5SSteve French * buffer lengths, but this is safe and close enough. 493538c8a9a5SSteve French */ 493638c8a9a5SSteve French output_size = min_t(unsigned int, output_size, server->maxBuf); 493738c8a9a5SSteve French output_size = min_t(unsigned int, output_size, 2 << 15); 493838c8a9a5SSteve French req->OutputBufferLength = cpu_to_le32(output_size); 493938c8a9a5SSteve French 494038c8a9a5SSteve French iov[0].iov_base = (char *)req; 494138c8a9a5SSteve French /* 1 for Buffer */ 494238c8a9a5SSteve French iov[0].iov_len = total_len - 1; 494338c8a9a5SSteve French 494438c8a9a5SSteve French iov[1].iov_base = (char *)(req->Buffer); 494538c8a9a5SSteve French iov[1].iov_len = len; 494638c8a9a5SSteve French 494738c8a9a5SSteve French trace_smb3_query_dir_enter(xid, persistent_fid, tcon->tid, 494838c8a9a5SSteve French tcon->ses->Suid, index, output_size); 494938c8a9a5SSteve French 495038c8a9a5SSteve French return 0; 495138c8a9a5SSteve French } 495238c8a9a5SSteve French 495338c8a9a5SSteve French void SMB2_query_directory_free(struct smb_rqst *rqst) 495438c8a9a5SSteve French { 495538c8a9a5SSteve French if (rqst && rqst->rq_iov) { 495638c8a9a5SSteve French cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */ 495738c8a9a5SSteve French } 495838c8a9a5SSteve French } 495938c8a9a5SSteve French 496038c8a9a5SSteve French int 496138c8a9a5SSteve French smb2_parse_query_directory(struct cifs_tcon *tcon, 496238c8a9a5SSteve French struct kvec *rsp_iov, 496338c8a9a5SSteve French int resp_buftype, 496438c8a9a5SSteve French struct cifs_search_info *srch_inf) 496538c8a9a5SSteve French { 496638c8a9a5SSteve French struct smb2_query_directory_rsp *rsp; 496738c8a9a5SSteve French size_t info_buf_size; 496838c8a9a5SSteve French char *end_of_smb; 496938c8a9a5SSteve French int rc; 497038c8a9a5SSteve French 497138c8a9a5SSteve French rsp = (struct smb2_query_directory_rsp *)rsp_iov->iov_base; 497238c8a9a5SSteve French 497338c8a9a5SSteve French switch (srch_inf->info_level) { 497438c8a9a5SSteve French case SMB_FIND_FILE_DIRECTORY_INFO: 497538c8a9a5SSteve French info_buf_size = sizeof(FILE_DIRECTORY_INFO); 497638c8a9a5SSteve French break; 497738c8a9a5SSteve French case SMB_FIND_FILE_ID_FULL_DIR_INFO: 497838c8a9a5SSteve French info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO); 497938c8a9a5SSteve French break; 498038c8a9a5SSteve French case SMB_FIND_FILE_POSIX_INFO: 498138c8a9a5SSteve French /* note that posix payload are variable size */ 498238c8a9a5SSteve French info_buf_size = sizeof(struct smb2_posix_info); 498338c8a9a5SSteve French break; 498438c8a9a5SSteve French default: 498538c8a9a5SSteve French cifs_tcon_dbg(VFS, "info level %u isn't supported\n", 498638c8a9a5SSteve French srch_inf->info_level); 498738c8a9a5SSteve French return -EINVAL; 498838c8a9a5SSteve French } 498938c8a9a5SSteve French 499038c8a9a5SSteve French rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 499138c8a9a5SSteve French le32_to_cpu(rsp->OutputBufferLength), rsp_iov, 499238c8a9a5SSteve French info_buf_size); 499338c8a9a5SSteve French if (rc) { 499438c8a9a5SSteve French cifs_tcon_dbg(VFS, "bad info payload"); 499538c8a9a5SSteve French return rc; 499638c8a9a5SSteve French } 499738c8a9a5SSteve French 499838c8a9a5SSteve French srch_inf->unicode = true; 499938c8a9a5SSteve French 500038c8a9a5SSteve French if (srch_inf->ntwrk_buf_start) { 500138c8a9a5SSteve French if (srch_inf->smallBuf) 500238c8a9a5SSteve French cifs_small_buf_release(srch_inf->ntwrk_buf_start); 500338c8a9a5SSteve French else 500438c8a9a5SSteve French cifs_buf_release(srch_inf->ntwrk_buf_start); 500538c8a9a5SSteve French } 500638c8a9a5SSteve French srch_inf->ntwrk_buf_start = (char *)rsp; 500738c8a9a5SSteve French srch_inf->srch_entries_start = srch_inf->last_entry = 500838c8a9a5SSteve French (char *)rsp + le16_to_cpu(rsp->OutputBufferOffset); 500938c8a9a5SSteve French end_of_smb = rsp_iov->iov_len + (char *)rsp; 501038c8a9a5SSteve French 501138c8a9a5SSteve French srch_inf->entries_in_buffer = num_entries( 501238c8a9a5SSteve French srch_inf->info_level, 501338c8a9a5SSteve French srch_inf->srch_entries_start, 501438c8a9a5SSteve French end_of_smb, 501538c8a9a5SSteve French &srch_inf->last_entry, 501638c8a9a5SSteve French info_buf_size); 501738c8a9a5SSteve French 501838c8a9a5SSteve French srch_inf->index_of_last_entry += srch_inf->entries_in_buffer; 501938c8a9a5SSteve French cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n", 502038c8a9a5SSteve French srch_inf->entries_in_buffer, srch_inf->index_of_last_entry, 502138c8a9a5SSteve French srch_inf->srch_entries_start, srch_inf->last_entry); 502238c8a9a5SSteve French if (resp_buftype == CIFS_LARGE_BUFFER) 502338c8a9a5SSteve French srch_inf->smallBuf = false; 502438c8a9a5SSteve French else if (resp_buftype == CIFS_SMALL_BUFFER) 502538c8a9a5SSteve French srch_inf->smallBuf = true; 502638c8a9a5SSteve French else 502738c8a9a5SSteve French cifs_tcon_dbg(VFS, "Invalid search buffer type\n"); 502838c8a9a5SSteve French 502938c8a9a5SSteve French return 0; 503038c8a9a5SSteve French } 503138c8a9a5SSteve French 503238c8a9a5SSteve French int 503338c8a9a5SSteve French SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon, 503438c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, int index, 503538c8a9a5SSteve French struct cifs_search_info *srch_inf) 503638c8a9a5SSteve French { 503738c8a9a5SSteve French struct smb_rqst rqst; 503838c8a9a5SSteve French struct kvec iov[SMB2_QUERY_DIRECTORY_IOV_SIZE]; 503938c8a9a5SSteve French struct smb2_query_directory_rsp *rsp = NULL; 504038c8a9a5SSteve French int resp_buftype = CIFS_NO_BUFFER; 504138c8a9a5SSteve French struct kvec rsp_iov; 504238c8a9a5SSteve French int rc = 0; 504338c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 504438c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 504538c8a9a5SSteve French int flags = 0; 504638c8a9a5SSteve French 504738c8a9a5SSteve French if (!ses || !(ses->server)) 504838c8a9a5SSteve French return -EIO; 504938c8a9a5SSteve French 505038c8a9a5SSteve French if (smb3_encryption_required(tcon)) 505138c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 505238c8a9a5SSteve French 505338c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 505438c8a9a5SSteve French memset(&iov, 0, sizeof(iov)); 505538c8a9a5SSteve French rqst.rq_iov = iov; 505638c8a9a5SSteve French rqst.rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE; 505738c8a9a5SSteve French 505838c8a9a5SSteve French rc = SMB2_query_directory_init(xid, tcon, server, 505938c8a9a5SSteve French &rqst, persistent_fid, 506038c8a9a5SSteve French volatile_fid, index, 506138c8a9a5SSteve French srch_inf->info_level); 506238c8a9a5SSteve French if (rc) 506338c8a9a5SSteve French goto qdir_exit; 506438c8a9a5SSteve French 506538c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 506638c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 506738c8a9a5SSteve French rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base; 506838c8a9a5SSteve French 506938c8a9a5SSteve French if (rc) { 507038c8a9a5SSteve French if (rc == -ENODATA && 507138c8a9a5SSteve French rsp->hdr.Status == STATUS_NO_MORE_FILES) { 507238c8a9a5SSteve French trace_smb3_query_dir_done(xid, persistent_fid, 507338c8a9a5SSteve French tcon->tid, tcon->ses->Suid, index, 0); 507438c8a9a5SSteve French srch_inf->endOfSearch = true; 507538c8a9a5SSteve French rc = 0; 507638c8a9a5SSteve French } else { 507738c8a9a5SSteve French trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid, 507838c8a9a5SSteve French tcon->ses->Suid, index, 0, rc); 507938c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE); 508038c8a9a5SSteve French } 508138c8a9a5SSteve French goto qdir_exit; 508238c8a9a5SSteve French } 508338c8a9a5SSteve French 508438c8a9a5SSteve French rc = smb2_parse_query_directory(tcon, &rsp_iov, resp_buftype, 508538c8a9a5SSteve French srch_inf); 508638c8a9a5SSteve French if (rc) { 508738c8a9a5SSteve French trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid, 508838c8a9a5SSteve French tcon->ses->Suid, index, 0, rc); 508938c8a9a5SSteve French goto qdir_exit; 509038c8a9a5SSteve French } 509138c8a9a5SSteve French resp_buftype = CIFS_NO_BUFFER; 509238c8a9a5SSteve French 509338c8a9a5SSteve French trace_smb3_query_dir_done(xid, persistent_fid, tcon->tid, 509438c8a9a5SSteve French tcon->ses->Suid, index, srch_inf->entries_in_buffer); 509538c8a9a5SSteve French 509638c8a9a5SSteve French qdir_exit: 509738c8a9a5SSteve French SMB2_query_directory_free(&rqst); 509838c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp); 509938c8a9a5SSteve French return rc; 510038c8a9a5SSteve French } 510138c8a9a5SSteve French 510238c8a9a5SSteve French int 510338c8a9a5SSteve French SMB2_set_info_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server, 510438c8a9a5SSteve French struct smb_rqst *rqst, 510538c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, u32 pid, 510638c8a9a5SSteve French u8 info_class, u8 info_type, u32 additional_info, 510738c8a9a5SSteve French void **data, unsigned int *size) 510838c8a9a5SSteve French { 510938c8a9a5SSteve French struct smb2_set_info_req *req; 511038c8a9a5SSteve French struct kvec *iov = rqst->rq_iov; 511138c8a9a5SSteve French unsigned int i, total_len; 511238c8a9a5SSteve French int rc; 511338c8a9a5SSteve French 511438c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_SET_INFO, tcon, server, 511538c8a9a5SSteve French (void **) &req, &total_len); 511638c8a9a5SSteve French if (rc) 511738c8a9a5SSteve French return rc; 511838c8a9a5SSteve French 511938c8a9a5SSteve French req->hdr.Id.SyncId.ProcessId = cpu_to_le32(pid); 512038c8a9a5SSteve French req->InfoType = info_type; 512138c8a9a5SSteve French req->FileInfoClass = info_class; 512238c8a9a5SSteve French req->PersistentFileId = persistent_fid; 512338c8a9a5SSteve French req->VolatileFileId = volatile_fid; 512438c8a9a5SSteve French req->AdditionalInformation = cpu_to_le32(additional_info); 512538c8a9a5SSteve French 512638c8a9a5SSteve French req->BufferOffset = cpu_to_le16(sizeof(struct smb2_set_info_req)); 512738c8a9a5SSteve French req->BufferLength = cpu_to_le32(*size); 512838c8a9a5SSteve French 512938c8a9a5SSteve French memcpy(req->Buffer, *data, *size); 513038c8a9a5SSteve French total_len += *size; 513138c8a9a5SSteve French 513238c8a9a5SSteve French iov[0].iov_base = (char *)req; 513338c8a9a5SSteve French /* 1 for Buffer */ 513438c8a9a5SSteve French iov[0].iov_len = total_len - 1; 513538c8a9a5SSteve French 513638c8a9a5SSteve French for (i = 1; i < rqst->rq_nvec; i++) { 513738c8a9a5SSteve French le32_add_cpu(&req->BufferLength, size[i]); 513838c8a9a5SSteve French iov[i].iov_base = (char *)data[i]; 513938c8a9a5SSteve French iov[i].iov_len = size[i]; 514038c8a9a5SSteve French } 514138c8a9a5SSteve French 514238c8a9a5SSteve French return 0; 514338c8a9a5SSteve French } 514438c8a9a5SSteve French 514538c8a9a5SSteve French void 514638c8a9a5SSteve French SMB2_set_info_free(struct smb_rqst *rqst) 514738c8a9a5SSteve French { 514838c8a9a5SSteve French if (rqst && rqst->rq_iov) 514938c8a9a5SSteve French cifs_buf_release(rqst->rq_iov[0].iov_base); /* request */ 515038c8a9a5SSteve French } 515138c8a9a5SSteve French 515238c8a9a5SSteve French static int 515338c8a9a5SSteve French send_set_info(const unsigned int xid, struct cifs_tcon *tcon, 515438c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class, 515538c8a9a5SSteve French u8 info_type, u32 additional_info, unsigned int num, 515638c8a9a5SSteve French void **data, unsigned int *size) 515738c8a9a5SSteve French { 515838c8a9a5SSteve French struct smb_rqst rqst; 515938c8a9a5SSteve French struct smb2_set_info_rsp *rsp = NULL; 516038c8a9a5SSteve French struct kvec *iov; 516138c8a9a5SSteve French struct kvec rsp_iov; 516238c8a9a5SSteve French int rc = 0; 516338c8a9a5SSteve French int resp_buftype; 516438c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 516538c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 516638c8a9a5SSteve French int flags = 0; 516738c8a9a5SSteve French 516838c8a9a5SSteve French if (!ses || !server) 516938c8a9a5SSteve French return -EIO; 517038c8a9a5SSteve French 517138c8a9a5SSteve French if (!num) 517238c8a9a5SSteve French return -EINVAL; 517338c8a9a5SSteve French 517438c8a9a5SSteve French if (smb3_encryption_required(tcon)) 517538c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 517638c8a9a5SSteve French 517738c8a9a5SSteve French iov = kmalloc_array(num, sizeof(struct kvec), GFP_KERNEL); 517838c8a9a5SSteve French if (!iov) 517938c8a9a5SSteve French return -ENOMEM; 518038c8a9a5SSteve French 518138c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 518238c8a9a5SSteve French rqst.rq_iov = iov; 518338c8a9a5SSteve French rqst.rq_nvec = num; 518438c8a9a5SSteve French 518538c8a9a5SSteve French rc = SMB2_set_info_init(tcon, server, 518638c8a9a5SSteve French &rqst, persistent_fid, volatile_fid, pid, 518738c8a9a5SSteve French info_class, info_type, additional_info, 518838c8a9a5SSteve French data, size); 518938c8a9a5SSteve French if (rc) { 519038c8a9a5SSteve French kfree(iov); 519138c8a9a5SSteve French return rc; 519238c8a9a5SSteve French } 519338c8a9a5SSteve French 519438c8a9a5SSteve French 519538c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 519638c8a9a5SSteve French &rqst, &resp_buftype, flags, 519738c8a9a5SSteve French &rsp_iov); 519838c8a9a5SSteve French SMB2_set_info_free(&rqst); 519938c8a9a5SSteve French rsp = (struct smb2_set_info_rsp *)rsp_iov.iov_base; 520038c8a9a5SSteve French 520138c8a9a5SSteve French if (rc != 0) { 520238c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE); 520338c8a9a5SSteve French trace_smb3_set_info_err(xid, persistent_fid, tcon->tid, 520438c8a9a5SSteve French ses->Suid, info_class, (__u32)info_type, rc); 520538c8a9a5SSteve French } 520638c8a9a5SSteve French 520738c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp); 520838c8a9a5SSteve French kfree(iov); 520938c8a9a5SSteve French return rc; 521038c8a9a5SSteve French } 521138c8a9a5SSteve French 521238c8a9a5SSteve French int 521338c8a9a5SSteve French SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, 521438c8a9a5SSteve French u64 volatile_fid, u32 pid, __le64 *eof) 521538c8a9a5SSteve French { 521638c8a9a5SSteve French struct smb2_file_eof_info info; 521738c8a9a5SSteve French void *data; 521838c8a9a5SSteve French unsigned int size; 521938c8a9a5SSteve French 522038c8a9a5SSteve French info.EndOfFile = *eof; 522138c8a9a5SSteve French 522238c8a9a5SSteve French data = &info; 522338c8a9a5SSteve French size = sizeof(struct smb2_file_eof_info); 522438c8a9a5SSteve French 522538c8a9a5SSteve French trace_smb3_set_eof(xid, persistent_fid, tcon->tid, tcon->ses->Suid, le64_to_cpu(*eof)); 522638c8a9a5SSteve French 522738c8a9a5SSteve French return send_set_info(xid, tcon, persistent_fid, volatile_fid, 522838c8a9a5SSteve French pid, FILE_END_OF_FILE_INFORMATION, SMB2_O_INFO_FILE, 522938c8a9a5SSteve French 0, 1, &data, &size); 523038c8a9a5SSteve French } 523138c8a9a5SSteve French 523238c8a9a5SSteve French int 523338c8a9a5SSteve French SMB2_set_acl(const unsigned int xid, struct cifs_tcon *tcon, 523438c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, 523538c8a9a5SSteve French struct cifs_ntsd *pnntsd, int pacllen, int aclflag) 523638c8a9a5SSteve French { 523738c8a9a5SSteve French return send_set_info(xid, tcon, persistent_fid, volatile_fid, 523838c8a9a5SSteve French current->tgid, 0, SMB2_O_INFO_SECURITY, aclflag, 523938c8a9a5SSteve French 1, (void **)&pnntsd, &pacllen); 524038c8a9a5SSteve French } 524138c8a9a5SSteve French 524238c8a9a5SSteve French int 524338c8a9a5SSteve French SMB2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, 524438c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, 524538c8a9a5SSteve French struct smb2_file_full_ea_info *buf, int len) 524638c8a9a5SSteve French { 524738c8a9a5SSteve French return send_set_info(xid, tcon, persistent_fid, volatile_fid, 524838c8a9a5SSteve French current->tgid, FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE, 524938c8a9a5SSteve French 0, 1, (void **)&buf, &len); 525038c8a9a5SSteve French } 525138c8a9a5SSteve French 525238c8a9a5SSteve French int 525338c8a9a5SSteve French SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon, 525438c8a9a5SSteve French const u64 persistent_fid, const u64 volatile_fid, 525538c8a9a5SSteve French __u8 oplock_level) 525638c8a9a5SSteve French { 525738c8a9a5SSteve French struct smb_rqst rqst; 525838c8a9a5SSteve French int rc; 525938c8a9a5SSteve French struct smb2_oplock_break *req = NULL; 526038c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 526138c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 526238c8a9a5SSteve French int flags = CIFS_OBREAK_OP; 526338c8a9a5SSteve French unsigned int total_len; 526438c8a9a5SSteve French struct kvec iov[1]; 526538c8a9a5SSteve French struct kvec rsp_iov; 526638c8a9a5SSteve French int resp_buf_type; 526738c8a9a5SSteve French 526838c8a9a5SSteve French cifs_dbg(FYI, "SMB2_oplock_break\n"); 526938c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, server, 527038c8a9a5SSteve French (void **) &req, &total_len); 527138c8a9a5SSteve French if (rc) 527238c8a9a5SSteve French return rc; 527338c8a9a5SSteve French 527438c8a9a5SSteve French if (smb3_encryption_required(tcon)) 527538c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 527638c8a9a5SSteve French 527738c8a9a5SSteve French req->VolatileFid = volatile_fid; 527838c8a9a5SSteve French req->PersistentFid = persistent_fid; 527938c8a9a5SSteve French req->OplockLevel = oplock_level; 528038c8a9a5SSteve French req->hdr.CreditRequest = cpu_to_le16(1); 528138c8a9a5SSteve French 528238c8a9a5SSteve French flags |= CIFS_NO_RSP_BUF; 528338c8a9a5SSteve French 528438c8a9a5SSteve French iov[0].iov_base = (char *)req; 528538c8a9a5SSteve French iov[0].iov_len = total_len; 528638c8a9a5SSteve French 528738c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 528838c8a9a5SSteve French rqst.rq_iov = iov; 528938c8a9a5SSteve French rqst.rq_nvec = 1; 529038c8a9a5SSteve French 529138c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 529238c8a9a5SSteve French &rqst, &resp_buf_type, flags, &rsp_iov); 529338c8a9a5SSteve French cifs_small_buf_release(req); 529438c8a9a5SSteve French 529538c8a9a5SSteve French if (rc) { 529638c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); 529738c8a9a5SSteve French cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc); 529838c8a9a5SSteve French } 529938c8a9a5SSteve French 530038c8a9a5SSteve French return rc; 530138c8a9a5SSteve French } 530238c8a9a5SSteve French 530338c8a9a5SSteve French void 530438c8a9a5SSteve French smb2_copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf, 530538c8a9a5SSteve French struct kstatfs *kst) 530638c8a9a5SSteve French { 530738c8a9a5SSteve French kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) * 530838c8a9a5SSteve French le32_to_cpu(pfs_inf->SectorsPerAllocationUnit); 530938c8a9a5SSteve French kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits); 531038c8a9a5SSteve French kst->f_bfree = kst->f_bavail = 531138c8a9a5SSteve French le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits); 531238c8a9a5SSteve French return; 531338c8a9a5SSteve French } 531438c8a9a5SSteve French 531538c8a9a5SSteve French static void 531638c8a9a5SSteve French copy_posix_fs_info_to_kstatfs(FILE_SYSTEM_POSIX_INFO *response_data, 531738c8a9a5SSteve French struct kstatfs *kst) 531838c8a9a5SSteve French { 531938c8a9a5SSteve French kst->f_bsize = le32_to_cpu(response_data->BlockSize); 532038c8a9a5SSteve French kst->f_blocks = le64_to_cpu(response_data->TotalBlocks); 532138c8a9a5SSteve French kst->f_bfree = le64_to_cpu(response_data->BlocksAvail); 532238c8a9a5SSteve French if (response_data->UserBlocksAvail == cpu_to_le64(-1)) 532338c8a9a5SSteve French kst->f_bavail = kst->f_bfree; 532438c8a9a5SSteve French else 532538c8a9a5SSteve French kst->f_bavail = le64_to_cpu(response_data->UserBlocksAvail); 532638c8a9a5SSteve French if (response_data->TotalFileNodes != cpu_to_le64(-1)) 532738c8a9a5SSteve French kst->f_files = le64_to_cpu(response_data->TotalFileNodes); 532838c8a9a5SSteve French if (response_data->FreeFileNodes != cpu_to_le64(-1)) 532938c8a9a5SSteve French kst->f_ffree = le64_to_cpu(response_data->FreeFileNodes); 533038c8a9a5SSteve French 533138c8a9a5SSteve French return; 533238c8a9a5SSteve French } 533338c8a9a5SSteve French 533438c8a9a5SSteve French static int 533538c8a9a5SSteve French build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, 533638c8a9a5SSteve French struct TCP_Server_Info *server, 533738c8a9a5SSteve French int level, int outbuf_len, u64 persistent_fid, 533838c8a9a5SSteve French u64 volatile_fid) 533938c8a9a5SSteve French { 534038c8a9a5SSteve French int rc; 534138c8a9a5SSteve French struct smb2_query_info_req *req; 534238c8a9a5SSteve French unsigned int total_len; 534338c8a9a5SSteve French 534438c8a9a5SSteve French cifs_dbg(FYI, "Query FSInfo level %d\n", level); 534538c8a9a5SSteve French 534638c8a9a5SSteve French if ((tcon->ses == NULL) || server == NULL) 534738c8a9a5SSteve French return -EIO; 534838c8a9a5SSteve French 534938c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, server, 535038c8a9a5SSteve French (void **) &req, &total_len); 535138c8a9a5SSteve French if (rc) 535238c8a9a5SSteve French return rc; 535338c8a9a5SSteve French 535438c8a9a5SSteve French req->InfoType = SMB2_O_INFO_FILESYSTEM; 535538c8a9a5SSteve French req->FileInfoClass = level; 535638c8a9a5SSteve French req->PersistentFileId = persistent_fid; 535738c8a9a5SSteve French req->VolatileFileId = volatile_fid; 535838c8a9a5SSteve French /* 1 for pad */ 535938c8a9a5SSteve French req->InputBufferOffset = 536038c8a9a5SSteve French cpu_to_le16(sizeof(struct smb2_query_info_req)); 536138c8a9a5SSteve French req->OutputBufferLength = cpu_to_le32( 536238c8a9a5SSteve French outbuf_len + sizeof(struct smb2_query_info_rsp)); 536338c8a9a5SSteve French 536438c8a9a5SSteve French iov->iov_base = (char *)req; 536538c8a9a5SSteve French iov->iov_len = total_len; 536638c8a9a5SSteve French return 0; 536738c8a9a5SSteve French } 536838c8a9a5SSteve French 536938c8a9a5SSteve French int 537038c8a9a5SSteve French SMB311_posix_qfs_info(const unsigned int xid, struct cifs_tcon *tcon, 537138c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata) 537238c8a9a5SSteve French { 537338c8a9a5SSteve French struct smb_rqst rqst; 537438c8a9a5SSteve French struct smb2_query_info_rsp *rsp = NULL; 537538c8a9a5SSteve French struct kvec iov; 537638c8a9a5SSteve French struct kvec rsp_iov; 537738c8a9a5SSteve French int rc = 0; 537838c8a9a5SSteve French int resp_buftype; 537938c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 538038c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 538138c8a9a5SSteve French FILE_SYSTEM_POSIX_INFO *info = NULL; 538238c8a9a5SSteve French int flags = 0; 538338c8a9a5SSteve French 538438c8a9a5SSteve French rc = build_qfs_info_req(&iov, tcon, server, 538538c8a9a5SSteve French FS_POSIX_INFORMATION, 538638c8a9a5SSteve French sizeof(FILE_SYSTEM_POSIX_INFO), 538738c8a9a5SSteve French persistent_fid, volatile_fid); 538838c8a9a5SSteve French if (rc) 538938c8a9a5SSteve French return rc; 539038c8a9a5SSteve French 539138c8a9a5SSteve French if (smb3_encryption_required(tcon)) 539238c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 539338c8a9a5SSteve French 539438c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 539538c8a9a5SSteve French rqst.rq_iov = &iov; 539638c8a9a5SSteve French rqst.rq_nvec = 1; 539738c8a9a5SSteve French 539838c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 539938c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 540038c8a9a5SSteve French cifs_small_buf_release(iov.iov_base); 540138c8a9a5SSteve French if (rc) { 540238c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); 540338c8a9a5SSteve French goto posix_qfsinf_exit; 540438c8a9a5SSteve French } 540538c8a9a5SSteve French rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 540638c8a9a5SSteve French 540738c8a9a5SSteve French info = (FILE_SYSTEM_POSIX_INFO *)( 540838c8a9a5SSteve French le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 540938c8a9a5SSteve French rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 541038c8a9a5SSteve French le32_to_cpu(rsp->OutputBufferLength), &rsp_iov, 541138c8a9a5SSteve French sizeof(FILE_SYSTEM_POSIX_INFO)); 541238c8a9a5SSteve French if (!rc) 541338c8a9a5SSteve French copy_posix_fs_info_to_kstatfs(info, fsdata); 541438c8a9a5SSteve French 541538c8a9a5SSteve French posix_qfsinf_exit: 541638c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp_iov.iov_base); 541738c8a9a5SSteve French return rc; 541838c8a9a5SSteve French } 541938c8a9a5SSteve French 542038c8a9a5SSteve French int 542138c8a9a5SSteve French SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon, 542238c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata) 542338c8a9a5SSteve French { 542438c8a9a5SSteve French struct smb_rqst rqst; 542538c8a9a5SSteve French struct smb2_query_info_rsp *rsp = NULL; 542638c8a9a5SSteve French struct kvec iov; 542738c8a9a5SSteve French struct kvec rsp_iov; 542838c8a9a5SSteve French int rc = 0; 542938c8a9a5SSteve French int resp_buftype; 543038c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 543138c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 543238c8a9a5SSteve French struct smb2_fs_full_size_info *info = NULL; 543338c8a9a5SSteve French int flags = 0; 543438c8a9a5SSteve French 543538c8a9a5SSteve French rc = build_qfs_info_req(&iov, tcon, server, 543638c8a9a5SSteve French FS_FULL_SIZE_INFORMATION, 543738c8a9a5SSteve French sizeof(struct smb2_fs_full_size_info), 543838c8a9a5SSteve French persistent_fid, volatile_fid); 543938c8a9a5SSteve French if (rc) 544038c8a9a5SSteve French return rc; 544138c8a9a5SSteve French 544238c8a9a5SSteve French if (smb3_encryption_required(tcon)) 544338c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 544438c8a9a5SSteve French 544538c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 544638c8a9a5SSteve French rqst.rq_iov = &iov; 544738c8a9a5SSteve French rqst.rq_nvec = 1; 544838c8a9a5SSteve French 544938c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 545038c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 545138c8a9a5SSteve French cifs_small_buf_release(iov.iov_base); 545238c8a9a5SSteve French if (rc) { 545338c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); 545438c8a9a5SSteve French goto qfsinf_exit; 545538c8a9a5SSteve French } 545638c8a9a5SSteve French rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 545738c8a9a5SSteve French 545838c8a9a5SSteve French info = (struct smb2_fs_full_size_info *)( 545938c8a9a5SSteve French le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); 546038c8a9a5SSteve French rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), 546138c8a9a5SSteve French le32_to_cpu(rsp->OutputBufferLength), &rsp_iov, 546238c8a9a5SSteve French sizeof(struct smb2_fs_full_size_info)); 546338c8a9a5SSteve French if (!rc) 546438c8a9a5SSteve French smb2_copy_fs_info_to_kstatfs(info, fsdata); 546538c8a9a5SSteve French 546638c8a9a5SSteve French qfsinf_exit: 546738c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp_iov.iov_base); 546838c8a9a5SSteve French return rc; 546938c8a9a5SSteve French } 547038c8a9a5SSteve French 547138c8a9a5SSteve French int 547238c8a9a5SSteve French SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon, 547338c8a9a5SSteve French u64 persistent_fid, u64 volatile_fid, int level) 547438c8a9a5SSteve French { 547538c8a9a5SSteve French struct smb_rqst rqst; 547638c8a9a5SSteve French struct smb2_query_info_rsp *rsp = NULL; 547738c8a9a5SSteve French struct kvec iov; 547838c8a9a5SSteve French struct kvec rsp_iov; 547938c8a9a5SSteve French int rc = 0; 548038c8a9a5SSteve French int resp_buftype, max_len, min_len; 548138c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 548238c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(ses); 548338c8a9a5SSteve French unsigned int rsp_len, offset; 548438c8a9a5SSteve French int flags = 0; 548538c8a9a5SSteve French 548638c8a9a5SSteve French if (level == FS_DEVICE_INFORMATION) { 548738c8a9a5SSteve French max_len = sizeof(FILE_SYSTEM_DEVICE_INFO); 548838c8a9a5SSteve French min_len = sizeof(FILE_SYSTEM_DEVICE_INFO); 548938c8a9a5SSteve French } else if (level == FS_ATTRIBUTE_INFORMATION) { 549038c8a9a5SSteve French max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO); 549138c8a9a5SSteve French min_len = MIN_FS_ATTR_INFO_SIZE; 549238c8a9a5SSteve French } else if (level == FS_SECTOR_SIZE_INFORMATION) { 549338c8a9a5SSteve French max_len = sizeof(struct smb3_fs_ss_info); 549438c8a9a5SSteve French min_len = sizeof(struct smb3_fs_ss_info); 549538c8a9a5SSteve French } else if (level == FS_VOLUME_INFORMATION) { 549638c8a9a5SSteve French max_len = sizeof(struct smb3_fs_vol_info) + MAX_VOL_LABEL_LEN; 549738c8a9a5SSteve French min_len = sizeof(struct smb3_fs_vol_info); 549838c8a9a5SSteve French } else { 549938c8a9a5SSteve French cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level); 550038c8a9a5SSteve French return -EINVAL; 550138c8a9a5SSteve French } 550238c8a9a5SSteve French 550338c8a9a5SSteve French rc = build_qfs_info_req(&iov, tcon, server, 550438c8a9a5SSteve French level, max_len, 550538c8a9a5SSteve French persistent_fid, volatile_fid); 550638c8a9a5SSteve French if (rc) 550738c8a9a5SSteve French return rc; 550838c8a9a5SSteve French 550938c8a9a5SSteve French if (smb3_encryption_required(tcon)) 551038c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 551138c8a9a5SSteve French 551238c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 551338c8a9a5SSteve French rqst.rq_iov = &iov; 551438c8a9a5SSteve French rqst.rq_nvec = 1; 551538c8a9a5SSteve French 551638c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 551738c8a9a5SSteve French &rqst, &resp_buftype, flags, &rsp_iov); 551838c8a9a5SSteve French cifs_small_buf_release(iov.iov_base); 551938c8a9a5SSteve French if (rc) { 552038c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); 552138c8a9a5SSteve French goto qfsattr_exit; 552238c8a9a5SSteve French } 552338c8a9a5SSteve French rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; 552438c8a9a5SSteve French 552538c8a9a5SSteve French rsp_len = le32_to_cpu(rsp->OutputBufferLength); 552638c8a9a5SSteve French offset = le16_to_cpu(rsp->OutputBufferOffset); 552738c8a9a5SSteve French rc = smb2_validate_iov(offset, rsp_len, &rsp_iov, min_len); 552838c8a9a5SSteve French if (rc) 552938c8a9a5SSteve French goto qfsattr_exit; 553038c8a9a5SSteve French 553138c8a9a5SSteve French if (level == FS_ATTRIBUTE_INFORMATION) 553238c8a9a5SSteve French memcpy(&tcon->fsAttrInfo, offset 553338c8a9a5SSteve French + (char *)rsp, min_t(unsigned int, 553438c8a9a5SSteve French rsp_len, max_len)); 553538c8a9a5SSteve French else if (level == FS_DEVICE_INFORMATION) 553638c8a9a5SSteve French memcpy(&tcon->fsDevInfo, offset 553738c8a9a5SSteve French + (char *)rsp, sizeof(FILE_SYSTEM_DEVICE_INFO)); 553838c8a9a5SSteve French else if (level == FS_SECTOR_SIZE_INFORMATION) { 553938c8a9a5SSteve French struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *) 554038c8a9a5SSteve French (offset + (char *)rsp); 554138c8a9a5SSteve French tcon->ss_flags = le32_to_cpu(ss_info->Flags); 554238c8a9a5SSteve French tcon->perf_sector_size = 554338c8a9a5SSteve French le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf); 554438c8a9a5SSteve French } else if (level == FS_VOLUME_INFORMATION) { 554538c8a9a5SSteve French struct smb3_fs_vol_info *vol_info = (struct smb3_fs_vol_info *) 554638c8a9a5SSteve French (offset + (char *)rsp); 554738c8a9a5SSteve French tcon->vol_serial_number = vol_info->VolumeSerialNumber; 554838c8a9a5SSteve French tcon->vol_create_time = vol_info->VolumeCreationTime; 554938c8a9a5SSteve French } 555038c8a9a5SSteve French 555138c8a9a5SSteve French qfsattr_exit: 555238c8a9a5SSteve French free_rsp_buf(resp_buftype, rsp_iov.iov_base); 555338c8a9a5SSteve French return rc; 555438c8a9a5SSteve French } 555538c8a9a5SSteve French 555638c8a9a5SSteve French int 555738c8a9a5SSteve French smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon, 555838c8a9a5SSteve French const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, 555938c8a9a5SSteve French const __u32 num_lock, struct smb2_lock_element *buf) 556038c8a9a5SSteve French { 556138c8a9a5SSteve French struct smb_rqst rqst; 556238c8a9a5SSteve French int rc = 0; 556338c8a9a5SSteve French struct smb2_lock_req *req = NULL; 556438c8a9a5SSteve French struct kvec iov[2]; 556538c8a9a5SSteve French struct kvec rsp_iov; 556638c8a9a5SSteve French int resp_buf_type; 556738c8a9a5SSteve French unsigned int count; 556838c8a9a5SSteve French int flags = CIFS_NO_RSP_BUF; 556938c8a9a5SSteve French unsigned int total_len; 557038c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses); 557138c8a9a5SSteve French 557238c8a9a5SSteve French cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock); 557338c8a9a5SSteve French 557438c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_LOCK, tcon, server, 557538c8a9a5SSteve French (void **) &req, &total_len); 557638c8a9a5SSteve French if (rc) 557738c8a9a5SSteve French return rc; 557838c8a9a5SSteve French 557938c8a9a5SSteve French if (smb3_encryption_required(tcon)) 558038c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 558138c8a9a5SSteve French 558238c8a9a5SSteve French req->hdr.Id.SyncId.ProcessId = cpu_to_le32(pid); 558338c8a9a5SSteve French req->LockCount = cpu_to_le16(num_lock); 558438c8a9a5SSteve French 558538c8a9a5SSteve French req->PersistentFileId = persist_fid; 558638c8a9a5SSteve French req->VolatileFileId = volatile_fid; 558738c8a9a5SSteve French 558838c8a9a5SSteve French count = num_lock * sizeof(struct smb2_lock_element); 558938c8a9a5SSteve French 559038c8a9a5SSteve French iov[0].iov_base = (char *)req; 559138c8a9a5SSteve French iov[0].iov_len = total_len - sizeof(struct smb2_lock_element); 559238c8a9a5SSteve French iov[1].iov_base = (char *)buf; 559338c8a9a5SSteve French iov[1].iov_len = count; 559438c8a9a5SSteve French 559538c8a9a5SSteve French cifs_stats_inc(&tcon->stats.cifs_stats.num_locks); 559638c8a9a5SSteve French 559738c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 559838c8a9a5SSteve French rqst.rq_iov = iov; 559938c8a9a5SSteve French rqst.rq_nvec = 2; 560038c8a9a5SSteve French 560138c8a9a5SSteve French rc = cifs_send_recv(xid, tcon->ses, server, 560238c8a9a5SSteve French &rqst, &resp_buf_type, flags, 560338c8a9a5SSteve French &rsp_iov); 560438c8a9a5SSteve French cifs_small_buf_release(req); 560538c8a9a5SSteve French if (rc) { 560638c8a9a5SSteve French cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc); 560738c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_LOCK_HE); 560838c8a9a5SSteve French trace_smb3_lock_err(xid, persist_fid, tcon->tid, 560938c8a9a5SSteve French tcon->ses->Suid, rc); 561038c8a9a5SSteve French } 561138c8a9a5SSteve French 561238c8a9a5SSteve French return rc; 561338c8a9a5SSteve French } 561438c8a9a5SSteve French 561538c8a9a5SSteve French int 561638c8a9a5SSteve French SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon, 561738c8a9a5SSteve French const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, 561838c8a9a5SSteve French const __u64 length, const __u64 offset, const __u32 lock_flags, 561938c8a9a5SSteve French const bool wait) 562038c8a9a5SSteve French { 562138c8a9a5SSteve French struct smb2_lock_element lock; 562238c8a9a5SSteve French 562338c8a9a5SSteve French lock.Offset = cpu_to_le64(offset); 562438c8a9a5SSteve French lock.Length = cpu_to_le64(length); 562538c8a9a5SSteve French lock.Flags = cpu_to_le32(lock_flags); 562638c8a9a5SSteve French if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK) 562738c8a9a5SSteve French lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY); 562838c8a9a5SSteve French 562938c8a9a5SSteve French return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock); 563038c8a9a5SSteve French } 563138c8a9a5SSteve French 563238c8a9a5SSteve French int 563338c8a9a5SSteve French SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon, 563438c8a9a5SSteve French __u8 *lease_key, const __le32 lease_state) 563538c8a9a5SSteve French { 563638c8a9a5SSteve French struct smb_rqst rqst; 563738c8a9a5SSteve French int rc; 563838c8a9a5SSteve French struct smb2_lease_ack *req = NULL; 563938c8a9a5SSteve French struct cifs_ses *ses = tcon->ses; 564038c8a9a5SSteve French int flags = CIFS_OBREAK_OP; 564138c8a9a5SSteve French unsigned int total_len; 564238c8a9a5SSteve French struct kvec iov[1]; 564338c8a9a5SSteve French struct kvec rsp_iov; 564438c8a9a5SSteve French int resp_buf_type; 564538c8a9a5SSteve French __u64 *please_key_high; 564638c8a9a5SSteve French __u64 *please_key_low; 564738c8a9a5SSteve French struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses); 564838c8a9a5SSteve French 564938c8a9a5SSteve French cifs_dbg(FYI, "SMB2_lease_break\n"); 565038c8a9a5SSteve French rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, server, 565138c8a9a5SSteve French (void **) &req, &total_len); 565238c8a9a5SSteve French if (rc) 565338c8a9a5SSteve French return rc; 565438c8a9a5SSteve French 565538c8a9a5SSteve French if (smb3_encryption_required(tcon)) 565638c8a9a5SSteve French flags |= CIFS_TRANSFORM_REQ; 565738c8a9a5SSteve French 565838c8a9a5SSteve French req->hdr.CreditRequest = cpu_to_le16(1); 565938c8a9a5SSteve French req->StructureSize = cpu_to_le16(36); 566038c8a9a5SSteve French total_len += 12; 566138c8a9a5SSteve French 566238c8a9a5SSteve French memcpy(req->LeaseKey, lease_key, 16); 566338c8a9a5SSteve French req->LeaseState = lease_state; 566438c8a9a5SSteve French 566538c8a9a5SSteve French flags |= CIFS_NO_RSP_BUF; 566638c8a9a5SSteve French 566738c8a9a5SSteve French iov[0].iov_base = (char *)req; 566838c8a9a5SSteve French iov[0].iov_len = total_len; 566938c8a9a5SSteve French 567038c8a9a5SSteve French memset(&rqst, 0, sizeof(struct smb_rqst)); 567138c8a9a5SSteve French rqst.rq_iov = iov; 567238c8a9a5SSteve French rqst.rq_nvec = 1; 567338c8a9a5SSteve French 567438c8a9a5SSteve French rc = cifs_send_recv(xid, ses, server, 567538c8a9a5SSteve French &rqst, &resp_buf_type, flags, &rsp_iov); 567638c8a9a5SSteve French cifs_small_buf_release(req); 567738c8a9a5SSteve French 567838c8a9a5SSteve French please_key_low = (__u64 *)lease_key; 567938c8a9a5SSteve French please_key_high = (__u64 *)(lease_key+8); 568038c8a9a5SSteve French if (rc) { 568138c8a9a5SSteve French cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); 568238c8a9a5SSteve French trace_smb3_lease_err(le32_to_cpu(lease_state), tcon->tid, 568338c8a9a5SSteve French ses->Suid, *please_key_low, *please_key_high, rc); 568438c8a9a5SSteve French cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc); 568538c8a9a5SSteve French } else 568638c8a9a5SSteve French trace_smb3_lease_done(le32_to_cpu(lease_state), tcon->tid, 568738c8a9a5SSteve French ses->Suid, *please_key_low, *please_key_high); 568838c8a9a5SSteve French 568938c8a9a5SSteve French return rc; 569038c8a9a5SSteve French } 5691