1 // SPDX-License-Identifier: GPL-2.0-only
3 * SMB1 (CIFS) version specific operations
5 * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
8 #include <linux/pagemap.h>
11 #include "cifsproto.h"
12 #include "cifs_debug.h"
14 #include "cifs_unicode.h"
17 * An NT cancel request header looks just like the original request except:
19 * The Command is SMB_COM_NT_CANCEL
20 * The WordCount is zeroed out
21 * The ByteCount is zeroed out
23 * This function mangles an existing request buffer into a
24 * SMB_COM_NT_CANCEL request and then sends it.
27 send_nt_cancel(struct TCP_Server_Info *server, struct smb_rqst *rqst,
28 struct mid_q_entry *mid)
31 struct smb_hdr *in_buf = (struct smb_hdr *)rqst->rq_iov[0].iov_base;
33 /* -4 for RFC1001 length and +2 for BCC field */
34 in_buf->smb_buf_length = cpu_to_be32(sizeof(struct smb_hdr) - 4 + 2);
35 in_buf->Command = SMB_COM_NT_CANCEL;
36 in_buf->WordCount = 0;
39 mutex_lock(&server->srv_mutex);
40 rc = cifs_sign_smb(in_buf, server, &mid->sequence_number);
42 mutex_unlock(&server->srv_mutex);
47 * The response to this call was already factored into the sequence
48 * number when the call went out, so we must adjust it back downward
51 --server->sequence_number;
52 rc = smb_send(server, in_buf, be32_to_cpu(in_buf->smb_buf_length));
54 server->sequence_number--;
56 mutex_unlock(&server->srv_mutex);
58 cifs_dbg(FYI, "issued NT_CANCEL for mid %u, rc = %d\n",
65 cifs_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
67 return ob1->fid.netfid == ob2->fid.netfid;
71 cifs_read_data_offset(char *buf)
73 READ_RSP *rsp = (READ_RSP *)buf;
74 return le16_to_cpu(rsp->DataOffset);
78 cifs_read_data_length(char *buf, bool in_remaining)
80 READ_RSP *rsp = (READ_RSP *)buf;
81 /* It's a bug reading remaining data for SMB1 packets */
82 WARN_ON(in_remaining);
83 return (le16_to_cpu(rsp->DataLengthHigh) << 16) +
84 le16_to_cpu(rsp->DataLength);
87 static struct mid_q_entry *
88 cifs_find_mid(struct TCP_Server_Info *server, char *buffer)
90 struct smb_hdr *buf = (struct smb_hdr *)buffer;
91 struct mid_q_entry *mid;
93 spin_lock(&GlobalMid_Lock);
94 list_for_each_entry(mid, &server->pending_mid_q, qhead) {
95 if (compare_mid(mid->mid, buf) &&
96 mid->mid_state == MID_REQUEST_SUBMITTED &&
97 le16_to_cpu(mid->command) == buf->Command) {
98 kref_get(&mid->refcount);
99 spin_unlock(&GlobalMid_Lock);
103 spin_unlock(&GlobalMid_Lock);
108 cifs_add_credits(struct TCP_Server_Info *server,
109 const struct cifs_credits *credits, const int optype)
111 spin_lock(&server->req_lock);
112 server->credits += credits->value;
114 spin_unlock(&server->req_lock);
115 wake_up(&server->request_q);
119 cifs_set_credits(struct TCP_Server_Info *server, const int val)
121 spin_lock(&server->req_lock);
122 server->credits = val;
123 server->oplocks = val > 1 ? enable_oplocks : false;
124 spin_unlock(&server->req_lock);
128 cifs_get_credits_field(struct TCP_Server_Info *server, const int optype)
130 return &server->credits;
134 cifs_get_credits(struct mid_q_entry *mid)
140 * Find a free multiplex id (SMB mid). Otherwise there could be
141 * mid collisions which might cause problems, demultiplexing the
142 * wrong response to this request. Multiplex ids could collide if
143 * one of a series requests takes much longer than the others, or
144 * if a very large number of long lived requests (byte range
145 * locks or FindNotify requests) are pending. No more than
146 * 64K-1 requests can be outstanding at one time. If no
147 * mids are available, return zero. A future optimization
148 * could make the combination of mids and uid the key we use
149 * to demultiplex on (rather than mid alone).
150 * In addition to the above check, the cifs demultiplex
151 * code already used the command code as a secondary
152 * check of the frame and if signing is negotiated the
153 * response would be discarded if the mid were the same
154 * but the signature was wrong. Since the mid is not put in the
155 * pending queue until later (when it is about to be dispatched)
156 * we do have to limit the number of outstanding requests
157 * to somewhat less than 64K-1 although it is hard to imagine
158 * so many threads being in the vfs at one time.
161 cifs_get_next_mid(struct TCP_Server_Info *server)
164 __u16 last_mid, cur_mid;
167 spin_lock(&GlobalMid_Lock);
169 /* mid is 16 bit only for CIFS/SMB */
170 cur_mid = (__u16)((server->CurrentMid) & 0xffff);
171 /* we do not want to loop forever */
174 /* avoid 0xFFFF MID */
175 if (cur_mid == 0xffff)
179 * This nested loop looks more expensive than it is.
180 * In practice the list of pending requests is short,
181 * fewer than 50, and the mids are likely to be unique
182 * on the first pass through the loop unless some request
183 * takes longer than the 64 thousand requests before it
184 * (and it would also have to have been a request that
187 while (cur_mid != last_mid) {
188 struct mid_q_entry *mid_entry;
189 unsigned int num_mids;
196 list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
198 if (mid_entry->mid == cur_mid &&
199 mid_entry->mid_state == MID_REQUEST_SUBMITTED) {
200 /* This mid is in use, try a different one */
207 * if we have more than 32k mids in the list, then something
208 * is very wrong. Possibly a local user is trying to DoS the
209 * box by issuing long-running calls and SIGKILL'ing them. If
210 * we get to 2^16 mids then we're in big trouble as this
211 * function could loop forever.
213 * Go ahead and assign out the mid in this situation, but force
214 * an eventual reconnect to clean out the pending_mid_q.
216 if (num_mids > 32768)
217 server->tcpStatus = CifsNeedReconnect;
220 mid = (__u64)cur_mid;
221 server->CurrentMid = mid;
226 spin_unlock(&GlobalMid_Lock);
232 0 not a transact2, or all data present
233 >0 transact2 with that much data missing
234 -EINVAL invalid transact2
237 check2ndT2(char *buf)
239 struct smb_hdr *pSMB = (struct smb_hdr *)buf;
240 struct smb_t2_rsp *pSMBt;
242 __u16 total_data_size, data_in_this_rsp;
244 if (pSMB->Command != SMB_COM_TRANSACTION2)
247 /* check for plausible wct, bcc and t2 data and parm sizes */
248 /* check for parm and data offset going beyond end of smb */
249 if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
250 cifs_dbg(FYI, "invalid transact2 word count\n");
254 pSMBt = (struct smb_t2_rsp *)pSMB;
256 total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount);
257 data_in_this_rsp = get_unaligned_le16(&pSMBt->t2_rsp.DataCount);
259 if (total_data_size == data_in_this_rsp)
261 else if (total_data_size < data_in_this_rsp) {
262 cifs_dbg(FYI, "total data %d smaller than data in frame %d\n",
263 total_data_size, data_in_this_rsp);
267 remaining = total_data_size - data_in_this_rsp;
269 cifs_dbg(FYI, "missing %d bytes from transact2, check next response\n",
271 if (total_data_size > CIFSMaxBufSize) {
272 cifs_dbg(VFS, "TotalDataSize %d is over maximum buffer %d\n",
273 total_data_size, CIFSMaxBufSize);
280 coalesce_t2(char *second_buf, struct smb_hdr *target_hdr)
282 struct smb_t2_rsp *pSMBs = (struct smb_t2_rsp *)second_buf;
283 struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)target_hdr;
284 char *data_area_of_tgt;
285 char *data_area_of_src;
287 unsigned int byte_count, total_in_tgt;
288 __u16 tgt_total_cnt, src_total_cnt, total_in_src;
290 src_total_cnt = get_unaligned_le16(&pSMBs->t2_rsp.TotalDataCount);
291 tgt_total_cnt = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount);
293 if (tgt_total_cnt != src_total_cnt)
294 cifs_dbg(FYI, "total data count of primary and secondary t2 differ source=%hu target=%hu\n",
295 src_total_cnt, tgt_total_cnt);
297 total_in_tgt = get_unaligned_le16(&pSMBt->t2_rsp.DataCount);
299 remaining = tgt_total_cnt - total_in_tgt;
302 cifs_dbg(FYI, "Server sent too much data. tgt_total_cnt=%hu total_in_tgt=%u\n",
303 tgt_total_cnt, total_in_tgt);
307 if (remaining == 0) {
308 /* nothing to do, ignore */
309 cifs_dbg(FYI, "no more data remains\n");
313 total_in_src = get_unaligned_le16(&pSMBs->t2_rsp.DataCount);
314 if (remaining < total_in_src)
315 cifs_dbg(FYI, "transact2 2nd response contains too much data\n");
317 /* find end of first SMB data area */
318 data_area_of_tgt = (char *)&pSMBt->hdr.Protocol +
319 get_unaligned_le16(&pSMBt->t2_rsp.DataOffset);
321 /* validate target area */
322 data_area_of_src = (char *)&pSMBs->hdr.Protocol +
323 get_unaligned_le16(&pSMBs->t2_rsp.DataOffset);
325 data_area_of_tgt += total_in_tgt;
327 total_in_tgt += total_in_src;
328 /* is the result too big for the field? */
329 if (total_in_tgt > USHRT_MAX) {
330 cifs_dbg(FYI, "coalesced DataCount too large (%u)\n",
334 put_unaligned_le16(total_in_tgt, &pSMBt->t2_rsp.DataCount);
337 byte_count = get_bcc(target_hdr);
338 byte_count += total_in_src;
339 /* is the result too big for the field? */
340 if (byte_count > USHRT_MAX) {
341 cifs_dbg(FYI, "coalesced BCC too large (%u)\n", byte_count);
344 put_bcc(byte_count, target_hdr);
346 byte_count = be32_to_cpu(target_hdr->smb_buf_length);
347 byte_count += total_in_src;
348 /* don't allow buffer to overflow */
349 if (byte_count > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) {
350 cifs_dbg(FYI, "coalesced BCC exceeds buffer size (%u)\n",
354 target_hdr->smb_buf_length = cpu_to_be32(byte_count);
356 /* copy second buffer into end of first buffer */
357 memcpy(data_area_of_tgt, data_area_of_src, total_in_src);
359 if (remaining != total_in_src) {
360 /* more responses to go */
361 cifs_dbg(FYI, "waiting for more secondary responses\n");
366 cifs_dbg(FYI, "found the last secondary response\n");
371 cifs_downgrade_oplock(struct TCP_Server_Info *server,
372 struct cifsInodeInfo *cinode, __u32 oplock,
373 unsigned int epoch, bool *purge_cache)
375 cifs_set_oplock_level(cinode, oplock);
379 cifs_check_trans2(struct mid_q_entry *mid, struct TCP_Server_Info *server,
380 char *buf, int malformed)
384 if (check2ndT2(buf) <= 0)
386 mid->multiRsp = true;
388 /* merge response - fix up 1st*/
389 malformed = coalesce_t2(buf, mid->resp_buf);
392 /* All parts received or packet is malformed. */
393 mid->multiEnd = true;
394 dequeue_mid(mid, malformed);
397 if (!server->large_buf) {
398 /*FIXME: switch to already allocated largebuf?*/
399 cifs_dbg(VFS, "1st trans2 resp needs bigbuf\n");
401 /* Have first buffer */
403 mid->large_buf = true;
404 server->bigbuf = NULL;
410 cifs_need_neg(struct TCP_Server_Info *server)
412 return server->maxBuf == 0;
416 cifs_negotiate(const unsigned int xid, struct cifs_ses *ses)
419 rc = CIFSSMBNegotiate(xid, ses);
421 /* retry only once on 1st time connection */
422 set_credits(ses->server, 1);
423 rc = CIFSSMBNegotiate(xid, ses);
431 cifs_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
433 __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
434 struct TCP_Server_Info *server = tcon->ses->server;
437 /* start with specified wsize, or default */
438 if (volume_info->wsize)
439 wsize = volume_info->wsize;
440 else if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_WRITE_CAP))
441 wsize = CIFS_DEFAULT_IOSIZE;
443 wsize = CIFS_DEFAULT_NON_POSIX_WSIZE;
445 /* can server support 24-bit write sizes? (via UNIX extensions) */
446 if (!tcon->unix_ext || !(unix_cap & CIFS_UNIX_LARGE_WRITE_CAP))
447 wsize = min_t(unsigned int, wsize, CIFS_MAX_RFC1002_WSIZE);
450 * no CAP_LARGE_WRITE_X or is signing enabled without CAP_UNIX set?
451 * Limit it to max buffer offered by the server, minus the size of the
452 * WRITEX header, not including the 4 byte RFC1001 length.
454 if (!(server->capabilities & CAP_LARGE_WRITE_X) ||
455 (!(server->capabilities & CAP_UNIX) && server->sign))
456 wsize = min_t(unsigned int, wsize,
457 server->maxBuf - sizeof(WRITE_REQ) + 4);
459 /* hard limit of CIFS_MAX_WSIZE */
460 wsize = min_t(unsigned int, wsize, CIFS_MAX_WSIZE);
466 cifs_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
468 __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
469 struct TCP_Server_Info *server = tcon->ses->server;
470 unsigned int rsize, defsize;
473 * Set default value...
475 * HACK alert! Ancient servers have very small buffers. Even though
476 * MS-CIFS indicates that servers are only limited by the client's
477 * bufsize for reads, testing against win98se shows that it throws
478 * INVALID_PARAMETER errors if you try to request too large a read.
479 * OS/2 just sends back short reads.
481 * If the server doesn't advertise CAP_LARGE_READ_X, then assume that
482 * it can't handle a read request larger than its MaxBufferSize either.
484 if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_READ_CAP))
485 defsize = CIFS_DEFAULT_IOSIZE;
486 else if (server->capabilities & CAP_LARGE_READ_X)
487 defsize = CIFS_DEFAULT_NON_POSIX_RSIZE;
489 defsize = server->maxBuf - sizeof(READ_RSP);
491 rsize = volume_info->rsize ? volume_info->rsize : defsize;
494 * no CAP_LARGE_READ_X? Then MS-CIFS states that we must limit this to
495 * the client's MaxBufferSize.
497 if (!(server->capabilities & CAP_LARGE_READ_X))
498 rsize = min_t(unsigned int, CIFSMaxBufSize, rsize);
500 /* hard limit of CIFS_MAX_RSIZE */
501 rsize = min_t(unsigned int, rsize, CIFS_MAX_RSIZE);
507 cifs_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
509 CIFSSMBQFSDeviceInfo(xid, tcon);
510 CIFSSMBQFSAttributeInfo(xid, tcon);
514 cifs_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
515 struct cifs_sb_info *cifs_sb, const char *full_path)
518 FILE_ALL_INFO *file_info;
520 file_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
521 if (file_info == NULL)
524 rc = CIFSSMBQPathInfo(xid, tcon, full_path, file_info,
525 0 /* not legacy */, cifs_sb->local_nls,
526 cifs_remap(cifs_sb));
528 if (rc == -EOPNOTSUPP || rc == -EINVAL)
529 rc = SMBQueryInformation(xid, tcon, full_path, file_info,
530 cifs_sb->local_nls, cifs_remap(cifs_sb));
536 cifs_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
537 struct cifs_sb_info *cifs_sb, const char *full_path,
538 FILE_ALL_INFO *data, bool *adjustTZ, bool *symlink)
544 /* could do find first instead but this returns more info */
545 rc = CIFSSMBQPathInfo(xid, tcon, full_path, data, 0 /* not legacy */,
546 cifs_sb->local_nls, cifs_remap(cifs_sb));
548 * BB optimize code so we do not make the above call when server claims
549 * no NT SMB support and the above call failed at least once - set flag
552 if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
553 rc = SMBQueryInformation(xid, tcon, full_path, data,
555 cifs_remap(cifs_sb));
559 if (!rc && (le32_to_cpu(data->Attributes) & ATTR_REPARSE)) {
563 struct cifs_open_parms oparms;
566 oparms.cifs_sb = cifs_sb;
567 oparms.desired_access = FILE_READ_ATTRIBUTES;
568 oparms.create_options = 0;
569 oparms.disposition = FILE_OPEN;
570 oparms.path = full_path;
572 oparms.reconnect = false;
574 /* Need to check if this is a symbolic link or not */
575 tmprc = CIFS_open(xid, &oparms, &oplock, NULL);
576 if (tmprc == -EOPNOTSUPP)
579 CIFSSMBClose(xid, tcon, fid.netfid);
586 cifs_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
587 struct cifs_sb_info *cifs_sb, const char *full_path,
588 u64 *uniqueid, FILE_ALL_INFO *data)
591 * We can not use the IndexNumber field by default from Windows or
592 * Samba (in ALL_INFO buf) but we can request it explicitly. The SNIA
593 * CIFS spec claims that this value is unique within the scope of a
594 * share, and the windows docs hint that it's actually unique
597 * There may be higher info levels that work but are there Windows
598 * server or network appliances for which IndexNumber field is not
601 return CIFSGetSrvInodeNumber(xid, tcon, full_path, uniqueid,
603 cifs_remap(cifs_sb));
607 cifs_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
608 struct cifs_fid *fid, FILE_ALL_INFO *data)
610 return CIFSSMBQFileInfo(xid, tcon, fid->netfid, data);
614 cifs_clear_stats(struct cifs_tcon *tcon)
616 atomic_set(&tcon->stats.cifs_stats.num_writes, 0);
617 atomic_set(&tcon->stats.cifs_stats.num_reads, 0);
618 atomic_set(&tcon->stats.cifs_stats.num_flushes, 0);
619 atomic_set(&tcon->stats.cifs_stats.num_oplock_brks, 0);
620 atomic_set(&tcon->stats.cifs_stats.num_opens, 0);
621 atomic_set(&tcon->stats.cifs_stats.num_posixopens, 0);
622 atomic_set(&tcon->stats.cifs_stats.num_posixmkdirs, 0);
623 atomic_set(&tcon->stats.cifs_stats.num_closes, 0);
624 atomic_set(&tcon->stats.cifs_stats.num_deletes, 0);
625 atomic_set(&tcon->stats.cifs_stats.num_mkdirs, 0);
626 atomic_set(&tcon->stats.cifs_stats.num_rmdirs, 0);
627 atomic_set(&tcon->stats.cifs_stats.num_renames, 0);
628 atomic_set(&tcon->stats.cifs_stats.num_t2renames, 0);
629 atomic_set(&tcon->stats.cifs_stats.num_ffirst, 0);
630 atomic_set(&tcon->stats.cifs_stats.num_fnext, 0);
631 atomic_set(&tcon->stats.cifs_stats.num_fclose, 0);
632 atomic_set(&tcon->stats.cifs_stats.num_hardlinks, 0);
633 atomic_set(&tcon->stats.cifs_stats.num_symlinks, 0);
634 atomic_set(&tcon->stats.cifs_stats.num_locks, 0);
635 atomic_set(&tcon->stats.cifs_stats.num_acl_get, 0);
636 atomic_set(&tcon->stats.cifs_stats.num_acl_set, 0);
640 cifs_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
642 seq_printf(m, " Oplocks breaks: %d",
643 atomic_read(&tcon->stats.cifs_stats.num_oplock_brks));
644 seq_printf(m, "\nReads: %d Bytes: %llu",
645 atomic_read(&tcon->stats.cifs_stats.num_reads),
646 (long long)(tcon->bytes_read));
647 seq_printf(m, "\nWrites: %d Bytes: %llu",
648 atomic_read(&tcon->stats.cifs_stats.num_writes),
649 (long long)(tcon->bytes_written));
650 seq_printf(m, "\nFlushes: %d",
651 atomic_read(&tcon->stats.cifs_stats.num_flushes));
652 seq_printf(m, "\nLocks: %d HardLinks: %d Symlinks: %d",
653 atomic_read(&tcon->stats.cifs_stats.num_locks),
654 atomic_read(&tcon->stats.cifs_stats.num_hardlinks),
655 atomic_read(&tcon->stats.cifs_stats.num_symlinks));
656 seq_printf(m, "\nOpens: %d Closes: %d Deletes: %d",
657 atomic_read(&tcon->stats.cifs_stats.num_opens),
658 atomic_read(&tcon->stats.cifs_stats.num_closes),
659 atomic_read(&tcon->stats.cifs_stats.num_deletes));
660 seq_printf(m, "\nPosix Opens: %d Posix Mkdirs: %d",
661 atomic_read(&tcon->stats.cifs_stats.num_posixopens),
662 atomic_read(&tcon->stats.cifs_stats.num_posixmkdirs));
663 seq_printf(m, "\nMkdirs: %d Rmdirs: %d",
664 atomic_read(&tcon->stats.cifs_stats.num_mkdirs),
665 atomic_read(&tcon->stats.cifs_stats.num_rmdirs));
666 seq_printf(m, "\nRenames: %d T2 Renames %d",
667 atomic_read(&tcon->stats.cifs_stats.num_renames),
668 atomic_read(&tcon->stats.cifs_stats.num_t2renames));
669 seq_printf(m, "\nFindFirst: %d FNext %d FClose %d",
670 atomic_read(&tcon->stats.cifs_stats.num_ffirst),
671 atomic_read(&tcon->stats.cifs_stats.num_fnext),
672 atomic_read(&tcon->stats.cifs_stats.num_fclose));
676 cifs_mkdir_setinfo(struct inode *inode, const char *full_path,
677 struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
678 const unsigned int xid)
680 FILE_BASIC_INFO info;
681 struct cifsInodeInfo *cifsInode;
685 memset(&info, 0, sizeof(info));
686 cifsInode = CIFS_I(inode);
687 dosattrs = cifsInode->cifsAttrs|ATTR_READONLY;
688 info.Attributes = cpu_to_le32(dosattrs);
689 rc = CIFSSMBSetPathInfo(xid, tcon, full_path, &info, cifs_sb->local_nls,
690 cifs_remap(cifs_sb));
692 cifsInode->cifsAttrs = dosattrs;
696 cifs_open_file(const unsigned int xid, struct cifs_open_parms *oparms,
697 __u32 *oplock, FILE_ALL_INFO *buf)
699 if (!(oparms->tcon->ses->capabilities & CAP_NT_SMBS))
700 return SMBLegacyOpen(xid, oparms->tcon, oparms->path,
702 oparms->desired_access,
703 oparms->create_options,
704 &oparms->fid->netfid, oplock, buf,
705 oparms->cifs_sb->local_nls,
706 cifs_remap(oparms->cifs_sb));
707 return CIFS_open(xid, oparms, oplock, buf);
711 cifs_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
713 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
714 cfile->fid.netfid = fid->netfid;
715 cifs_set_oplock_level(cinode, oplock);
716 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
720 cifs_close_file(const unsigned int xid, struct cifs_tcon *tcon,
721 struct cifs_fid *fid)
723 CIFSSMBClose(xid, tcon, fid->netfid);
727 cifs_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
728 struct cifs_fid *fid)
730 return CIFSSMBFlush(xid, tcon, fid->netfid);
734 cifs_sync_read(const unsigned int xid, struct cifs_fid *pfid,
735 struct cifs_io_parms *parms, unsigned int *bytes_read,
736 char **buf, int *buf_type)
738 parms->netfid = pfid->netfid;
739 return CIFSSMBRead(xid, parms, bytes_read, buf, buf_type);
743 cifs_sync_write(const unsigned int xid, struct cifs_fid *pfid,
744 struct cifs_io_parms *parms, unsigned int *written,
745 struct kvec *iov, unsigned long nr_segs)
748 parms->netfid = pfid->netfid;
749 return CIFSSMBWrite2(xid, parms, written, iov, nr_segs);
753 smb_set_file_info(struct inode *inode, const char *full_path,
754 FILE_BASIC_INFO *buf, const unsigned int xid)
760 struct cifs_open_parms oparms;
761 struct cifsFileInfo *open_file;
762 struct cifsInodeInfo *cinode = CIFS_I(inode);
763 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
764 struct tcon_link *tlink = NULL;
765 struct cifs_tcon *tcon;
767 /* if the file is already open for write, just use that fileid */
768 open_file = find_writable_file(cinode, true);
770 fid.netfid = open_file->fid.netfid;
771 netpid = open_file->pid;
772 tcon = tlink_tcon(open_file->tlink);
773 goto set_via_filehandle;
776 tlink = cifs_sb_tlink(cifs_sb);
782 tcon = tlink_tcon(tlink);
784 rc = CIFSSMBSetPathInfo(xid, tcon, full_path, buf, cifs_sb->local_nls,
785 cifs_remap(cifs_sb));
787 cinode->cifsAttrs = le32_to_cpu(buf->Attributes);
789 } else if (rc != -EOPNOTSUPP && rc != -EINVAL) {
794 oparms.cifs_sb = cifs_sb;
795 oparms.desired_access = SYNCHRONIZE | FILE_WRITE_ATTRIBUTES;
796 oparms.create_options = CREATE_NOT_DIR;
797 oparms.disposition = FILE_OPEN;
798 oparms.path = full_path;
800 oparms.reconnect = false;
802 cifs_dbg(FYI, "calling SetFileInfo since SetPathInfo for times not supported by this server\n");
803 rc = CIFS_open(xid, &oparms, &oplock, NULL);
810 netpid = current->tgid;
813 rc = CIFSSMBSetFileInfo(xid, tcon, buf, fid.netfid, netpid);
815 cinode->cifsAttrs = le32_to_cpu(buf->Attributes);
817 if (open_file == NULL)
818 CIFSSMBClose(xid, tcon, fid.netfid);
820 cifsFileInfo_put(open_file);
823 cifs_put_tlink(tlink);
828 cifs_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
829 struct cifsFileInfo *cfile)
831 return CIFSSMB_set_compression(xid, tcon, cfile->fid.netfid);
835 cifs_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
836 const char *path, struct cifs_sb_info *cifs_sb,
837 struct cifs_fid *fid, __u16 search_flags,
838 struct cifs_search_info *srch_inf)
842 rc = CIFSFindFirst(xid, tcon, path, cifs_sb,
843 &fid->netfid, search_flags, srch_inf, true);
845 cifs_dbg(FYI, "find first failed=%d\n", rc);
850 cifs_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
851 struct cifs_fid *fid, __u16 search_flags,
852 struct cifs_search_info *srch_inf)
854 return CIFSFindNext(xid, tcon, fid->netfid, search_flags, srch_inf);
858 cifs_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
859 struct cifs_fid *fid)
861 return CIFSFindClose(xid, tcon, fid->netfid);
865 cifs_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
866 struct cifsInodeInfo *cinode)
868 return CIFSSMBLock(0, tcon, fid->netfid, current->tgid, 0, 0, 0, 0,
869 LOCKING_ANDX_OPLOCK_RELEASE, false,
870 CIFS_CACHE_READ(cinode) ? 1 : 0);
874 cifs_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
877 int rc = -EOPNOTSUPP;
879 buf->f_type = CIFS_MAGIC_NUMBER;
882 * We could add a second check for a QFS Unix capability bit
884 if ((tcon->ses->capabilities & CAP_UNIX) &&
885 (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
886 rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
889 * Only need to call the old QFSInfo if failed on newer one,
892 if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
893 rc = CIFSSMBQFSInfo(xid, tcon, buf);
896 * Some old Windows servers also do not support level 103, retry with
897 * older level one if old server failed the previous call or we
898 * bypassed it because we detected that this was an older LANMAN sess
901 rc = SMBOldQFSInfo(xid, tcon, buf);
906 cifs_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
907 __u64 length, __u32 type, int lock, int unlock, bool wait)
909 return CIFSSMBLock(xid, tlink_tcon(cfile->tlink), cfile->fid.netfid,
910 current->tgid, length, offset, unlock, lock,
911 (__u8)type, wait, 0);
915 cifs_unix_dfs_readlink(const unsigned int xid, struct cifs_tcon *tcon,
916 const unsigned char *searchName, char **symlinkinfo,
917 const struct nls_table *nls_codepage)
919 #ifdef CONFIG_CIFS_DFS_UPCALL
921 struct dfs_info3_param referral = {0};
923 rc = get_dfs_path(xid, tcon->ses, searchName, nls_codepage, &referral,
927 *symlinkinfo = kstrndup(referral.node_name,
928 strlen(referral.node_name),
930 free_dfs_info_param(&referral);
935 #else /* No DFS support */
941 cifs_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
942 struct cifs_sb_info *cifs_sb, const char *full_path,
943 char **target_path, bool is_reparse_point)
948 struct cifs_open_parms oparms;
950 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
952 if (is_reparse_point) {
953 cifs_dbg(VFS, "reparse points not handled for SMB1 symlinks\n");
957 /* Check for unix extensions */
958 if (cap_unix(tcon->ses)) {
959 rc = CIFSSMBUnixQuerySymLink(xid, tcon, full_path, target_path,
961 cifs_remap(cifs_sb));
963 rc = cifs_unix_dfs_readlink(xid, tcon, full_path,
971 oparms.cifs_sb = cifs_sb;
972 oparms.desired_access = FILE_READ_ATTRIBUTES;
973 oparms.create_options = OPEN_REPARSE_POINT;
974 oparms.disposition = FILE_OPEN;
975 oparms.path = full_path;
977 oparms.reconnect = false;
979 rc = CIFS_open(xid, &oparms, &oplock, NULL);
983 rc = CIFSSMBQuerySymLink(xid, tcon, fid.netfid, target_path,
988 convert_delimiter(*target_path, '/');
990 CIFSSMBClose(xid, tcon, fid.netfid);
993 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
998 cifs_is_read_op(__u32 oplock)
1000 return oplock == OPLOCK_READ;
1004 cifs_wp_retry_size(struct inode *inode)
1006 return CIFS_SB(inode->i_sb)->wsize;
1010 cifs_dir_needs_close(struct cifsFileInfo *cfile)
1012 return !cfile->srch_inf.endOfSearch && !cfile->invalidHandle;
1016 cifs_can_echo(struct TCP_Server_Info *server)
1018 if (server->tcpStatus == CifsGood)
1025 cifs_make_node(unsigned int xid, struct inode *inode,
1026 struct dentry *dentry, struct cifs_tcon *tcon,
1027 char *full_path, umode_t mode, dev_t dev)
1029 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1030 struct inode *newinode = NULL;
1032 int create_options = CREATE_NOT_DIR | CREATE_OPTION_SPECIAL;
1033 FILE_ALL_INFO *buf = NULL;
1034 struct cifs_io_parms io_parms;
1036 struct cifs_fid fid;
1037 struct cifs_open_parms oparms;
1038 unsigned int bytes_written;
1039 struct win_dev *pdev;
1042 if (tcon->unix_ext) {
1044 * SMB1 Unix Extensions: requires server support but
1045 * works with all special files
1047 struct cifs_unix_set_info_args args = {
1048 .mode = mode & ~current_umask(),
1049 .ctime = NO_CHANGE_64,
1050 .atime = NO_CHANGE_64,
1051 .mtime = NO_CHANGE_64,
1054 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1055 args.uid = current_fsuid();
1056 args.gid = current_fsgid();
1058 args.uid = INVALID_UID; /* no change */
1059 args.gid = INVALID_GID; /* no change */
1061 rc = CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args,
1063 cifs_remap(cifs_sb));
1067 rc = cifs_get_inode_info_unix(&newinode, full_path,
1071 d_instantiate(dentry, newinode);
1076 * SMB1 SFU emulation: should work with all servers, but only
1077 * support block and char device (no socket & fifo)
1079 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
1082 if (!S_ISCHR(mode) && !S_ISBLK(mode))
1085 cifs_dbg(FYI, "sfu compat create special file\n");
1087 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
1093 if (backup_cred(cifs_sb))
1094 create_options |= CREATE_OPEN_BACKUP_INTENT;
1097 oparms.cifs_sb = cifs_sb;
1098 oparms.desired_access = GENERIC_WRITE;
1099 oparms.create_options = create_options;
1100 oparms.disposition = FILE_CREATE;
1101 oparms.path = full_path;
1103 oparms.reconnect = false;
1105 if (tcon->ses->server->oplocks)
1106 oplock = REQ_OPLOCK;
1109 rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, buf);
1114 * BB Do not bother to decode buf since no local inode yet to put
1115 * timestamps in, but we can reuse it safely.
1118 pdev = (struct win_dev *)buf;
1119 io_parms.pid = current->tgid;
1120 io_parms.tcon = tcon;
1121 io_parms.offset = 0;
1122 io_parms.length = sizeof(struct win_dev);
1123 iov[1].iov_base = buf;
1124 iov[1].iov_len = sizeof(struct win_dev);
1125 if (S_ISCHR(mode)) {
1126 memcpy(pdev->type, "IntxCHR", 8);
1127 pdev->major = cpu_to_le64(MAJOR(dev));
1128 pdev->minor = cpu_to_le64(MINOR(dev));
1129 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
1130 &bytes_written, iov, 1);
1131 } else if (S_ISBLK(mode)) {
1132 memcpy(pdev->type, "IntxBLK", 8);
1133 pdev->major = cpu_to_le64(MAJOR(dev));
1134 pdev->minor = cpu_to_le64(MINOR(dev));
1135 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
1136 &bytes_written, iov, 1);
1138 tcon->ses->server->ops->close(xid, tcon, &fid);
1141 /* FIXME: add code here to set EAs */
1149 struct smb_version_operations smb1_operations = {
1150 .send_cancel = send_nt_cancel,
1151 .compare_fids = cifs_compare_fids,
1152 .setup_request = cifs_setup_request,
1153 .setup_async_request = cifs_setup_async_request,
1154 .check_receive = cifs_check_receive,
1155 .add_credits = cifs_add_credits,
1156 .set_credits = cifs_set_credits,
1157 .get_credits_field = cifs_get_credits_field,
1158 .get_credits = cifs_get_credits,
1159 .wait_mtu_credits = cifs_wait_mtu_credits,
1160 .get_next_mid = cifs_get_next_mid,
1161 .read_data_offset = cifs_read_data_offset,
1162 .read_data_length = cifs_read_data_length,
1163 .map_error = map_smb_to_linux_error,
1164 .find_mid = cifs_find_mid,
1165 .check_message = checkSMB,
1166 .dump_detail = cifs_dump_detail,
1167 .clear_stats = cifs_clear_stats,
1168 .print_stats = cifs_print_stats,
1169 .is_oplock_break = is_valid_oplock_break,
1170 .downgrade_oplock = cifs_downgrade_oplock,
1171 .check_trans2 = cifs_check_trans2,
1172 .need_neg = cifs_need_neg,
1173 .negotiate = cifs_negotiate,
1174 .negotiate_wsize = cifs_negotiate_wsize,
1175 .negotiate_rsize = cifs_negotiate_rsize,
1176 .sess_setup = CIFS_SessSetup,
1177 .logoff = CIFSSMBLogoff,
1178 .tree_connect = CIFSTCon,
1179 .tree_disconnect = CIFSSMBTDis,
1180 .get_dfs_refer = CIFSGetDFSRefer,
1181 .qfs_tcon = cifs_qfs_tcon,
1182 .is_path_accessible = cifs_is_path_accessible,
1183 .can_echo = cifs_can_echo,
1184 .query_path_info = cifs_query_path_info,
1185 .query_file_info = cifs_query_file_info,
1186 .get_srv_inum = cifs_get_srv_inum,
1187 .set_path_size = CIFSSMBSetEOF,
1188 .set_file_size = CIFSSMBSetFileSize,
1189 .set_file_info = smb_set_file_info,
1190 .set_compression = cifs_set_compression,
1191 .echo = CIFSSMBEcho,
1192 .mkdir = CIFSSMBMkDir,
1193 .mkdir_setinfo = cifs_mkdir_setinfo,
1194 .rmdir = CIFSSMBRmDir,
1195 .unlink = CIFSSMBDelFile,
1196 .rename_pending_delete = cifs_rename_pending_delete,
1197 .rename = CIFSSMBRename,
1198 .create_hardlink = CIFSCreateHardLink,
1199 .query_symlink = cifs_query_symlink,
1200 .open = cifs_open_file,
1201 .set_fid = cifs_set_fid,
1202 .close = cifs_close_file,
1203 .flush = cifs_flush_file,
1204 .async_readv = cifs_async_readv,
1205 .async_writev = cifs_async_writev,
1206 .sync_read = cifs_sync_read,
1207 .sync_write = cifs_sync_write,
1208 .query_dir_first = cifs_query_dir_first,
1209 .query_dir_next = cifs_query_dir_next,
1210 .close_dir = cifs_close_dir,
1211 .calc_smb_size = smbCalcSize,
1212 .oplock_response = cifs_oplock_response,
1213 .queryfs = cifs_queryfs,
1214 .mand_lock = cifs_mand_lock,
1215 .mand_unlock_range = cifs_unlock_range,
1216 .push_mand_locks = cifs_push_mandatory_locks,
1217 .query_mf_symlink = cifs_query_mf_symlink,
1218 .create_mf_symlink = cifs_create_mf_symlink,
1219 .is_read_op = cifs_is_read_op,
1220 .wp_retry_size = cifs_wp_retry_size,
1221 .dir_needs_close = cifs_dir_needs_close,
1222 .select_sectype = cifs_select_sectype,
1223 #ifdef CONFIG_CIFS_XATTR
1224 .query_all_EAs = CIFSSMBQAllEAs,
1225 .set_EA = CIFSSMBSetEA,
1226 #endif /* CIFS_XATTR */
1227 .get_acl = get_cifs_acl,
1228 .get_acl_by_fid = get_cifs_acl_by_fid,
1229 .set_acl = set_cifs_acl,
1230 .make_node = cifs_make_node,
1233 struct smb_version_values smb1_values = {
1234 .version_string = SMB1_VERSION_STRING,
1235 .protocol_id = SMB10_PROT_ID,
1236 .large_lock_type = LOCKING_ANDX_LARGE_FILES,
1237 .exclusive_lock_type = 0,
1238 .shared_lock_type = LOCKING_ANDX_SHARED_LOCK,
1239 .unlock_lock_type = 0,
1240 .header_preamble_size = 4,
1241 .header_size = sizeof(struct smb_hdr),
1242 .max_header_size = MAX_CIFS_HDR_SIZE,
1243 .read_rsp_size = sizeof(READ_RSP),
1244 .lock_cmd = cpu_to_le16(SMB_COM_LOCKING_ANDX),
1245 .cap_unix = CAP_UNIX,
1246 .cap_nt_find = CAP_NT_SMBS | CAP_NT_FIND,
1247 .cap_large_files = CAP_LARGE_FILES,
1248 .signing_enabled = SECMODE_SIGN_ENABLED,
1249 .signing_required = SECMODE_SIGN_REQUIRED,