2 * SMB1 (CIFS) version specific operations
4 * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
6 * This library is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License v2 as published
8 * by the Free Software Foundation.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13 * the GNU Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public License
16 * along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 #include <linux/pagemap.h>
21 #include <linux/vfs.h>
23 #include "cifsproto.h"
24 #include "cifs_debug.h"
26 #include "cifs_unicode.h"
29 * An NT cancel request header looks just like the original request except:
31 * The Command is SMB_COM_NT_CANCEL
32 * The WordCount is zeroed out
33 * The ByteCount is zeroed out
35 * This function mangles an existing request buffer into a
36 * SMB_COM_NT_CANCEL request and then sends it.
39 send_nt_cancel(struct TCP_Server_Info *server, struct smb_rqst *rqst,
40 struct mid_q_entry *mid)
43 struct smb_hdr *in_buf = (struct smb_hdr *)rqst->rq_iov[0].iov_base;
45 /* -4 for RFC1001 length and +2 for BCC field */
46 in_buf->smb_buf_length = cpu_to_be32(sizeof(struct smb_hdr) - 4 + 2);
47 in_buf->Command = SMB_COM_NT_CANCEL;
48 in_buf->WordCount = 0;
51 mutex_lock(&server->srv_mutex);
52 rc = cifs_sign_smb(in_buf, server, &mid->sequence_number);
54 mutex_unlock(&server->srv_mutex);
59 * The response to this call was already factored into the sequence
60 * number when the call went out, so we must adjust it back downward
63 --server->sequence_number;
64 rc = smb_send(server, in_buf, be32_to_cpu(in_buf->smb_buf_length));
66 server->sequence_number--;
68 mutex_unlock(&server->srv_mutex);
70 cifs_dbg(FYI, "issued NT_CANCEL for mid %u, rc = %d\n",
77 cifs_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
79 return ob1->fid.netfid == ob2->fid.netfid;
83 cifs_read_data_offset(char *buf)
85 READ_RSP *rsp = (READ_RSP *)buf;
86 return le16_to_cpu(rsp->DataOffset);
90 cifs_read_data_length(char *buf, bool in_remaining)
92 READ_RSP *rsp = (READ_RSP *)buf;
93 /* It's a bug reading remaining data for SMB1 packets */
94 WARN_ON(in_remaining);
95 return (le16_to_cpu(rsp->DataLengthHigh) << 16) +
96 le16_to_cpu(rsp->DataLength);
99 static struct mid_q_entry *
100 cifs_find_mid(struct TCP_Server_Info *server, char *buffer)
102 struct smb_hdr *buf = (struct smb_hdr *)buffer;
103 struct mid_q_entry *mid;
105 spin_lock(&GlobalMid_Lock);
106 list_for_each_entry(mid, &server->pending_mid_q, qhead) {
107 if (compare_mid(mid->mid, buf) &&
108 mid->mid_state == MID_REQUEST_SUBMITTED &&
109 le16_to_cpu(mid->command) == buf->Command) {
110 kref_get(&mid->refcount);
111 spin_unlock(&GlobalMid_Lock);
115 spin_unlock(&GlobalMid_Lock);
120 cifs_add_credits(struct TCP_Server_Info *server, const unsigned int add,
123 spin_lock(&server->req_lock);
124 server->credits += add;
126 spin_unlock(&server->req_lock);
127 wake_up(&server->request_q);
131 cifs_set_credits(struct TCP_Server_Info *server, const int val)
133 spin_lock(&server->req_lock);
134 server->credits = val;
135 server->oplocks = val > 1 ? enable_oplocks : false;
136 spin_unlock(&server->req_lock);
140 cifs_get_credits_field(struct TCP_Server_Info *server, const int optype)
142 return &server->credits;
146 cifs_get_credits(struct mid_q_entry *mid)
152 * Find a free multiplex id (SMB mid). Otherwise there could be
153 * mid collisions which might cause problems, demultiplexing the
154 * wrong response to this request. Multiplex ids could collide if
155 * one of a series requests takes much longer than the others, or
156 * if a very large number of long lived requests (byte range
157 * locks or FindNotify requests) are pending. No more than
158 * 64K-1 requests can be outstanding at one time. If no
159 * mids are available, return zero. A future optimization
160 * could make the combination of mids and uid the key we use
161 * to demultiplex on (rather than mid alone).
162 * In addition to the above check, the cifs demultiplex
163 * code already used the command code as a secondary
164 * check of the frame and if signing is negotiated the
165 * response would be discarded if the mid were the same
166 * but the signature was wrong. Since the mid is not put in the
167 * pending queue until later (when it is about to be dispatched)
168 * we do have to limit the number of outstanding requests
169 * to somewhat less than 64K-1 although it is hard to imagine
170 * so many threads being in the vfs at one time.
173 cifs_get_next_mid(struct TCP_Server_Info *server)
176 __u16 last_mid, cur_mid;
179 spin_lock(&GlobalMid_Lock);
181 /* mid is 16 bit only for CIFS/SMB */
182 cur_mid = (__u16)((server->CurrentMid) & 0xffff);
183 /* we do not want to loop forever */
186 /* avoid 0xFFFF MID */
187 if (cur_mid == 0xffff)
191 * This nested loop looks more expensive than it is.
192 * In practice the list of pending requests is short,
193 * fewer than 50, and the mids are likely to be unique
194 * on the first pass through the loop unless some request
195 * takes longer than the 64 thousand requests before it
196 * (and it would also have to have been a request that
199 while (cur_mid != last_mid) {
200 struct mid_q_entry *mid_entry;
201 unsigned int num_mids;
208 list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
210 if (mid_entry->mid == cur_mid &&
211 mid_entry->mid_state == MID_REQUEST_SUBMITTED) {
212 /* This mid is in use, try a different one */
219 * if we have more than 32k mids in the list, then something
220 * is very wrong. Possibly a local user is trying to DoS the
221 * box by issuing long-running calls and SIGKILL'ing them. If
222 * we get to 2^16 mids then we're in big trouble as this
223 * function could loop forever.
225 * Go ahead and assign out the mid in this situation, but force
226 * an eventual reconnect to clean out the pending_mid_q.
228 if (num_mids > 32768)
229 server->tcpStatus = CifsNeedReconnect;
232 mid = (__u64)cur_mid;
233 server->CurrentMid = mid;
238 spin_unlock(&GlobalMid_Lock);
244 0 not a transact2, or all data present
245 >0 transact2 with that much data missing
246 -EINVAL invalid transact2
249 check2ndT2(char *buf)
251 struct smb_hdr *pSMB = (struct smb_hdr *)buf;
252 struct smb_t2_rsp *pSMBt;
254 __u16 total_data_size, data_in_this_rsp;
256 if (pSMB->Command != SMB_COM_TRANSACTION2)
259 /* check for plausible wct, bcc and t2 data and parm sizes */
260 /* check for parm and data offset going beyond end of smb */
261 if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
262 cifs_dbg(FYI, "invalid transact2 word count\n");
266 pSMBt = (struct smb_t2_rsp *)pSMB;
268 total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount);
269 data_in_this_rsp = get_unaligned_le16(&pSMBt->t2_rsp.DataCount);
271 if (total_data_size == data_in_this_rsp)
273 else if (total_data_size < data_in_this_rsp) {
274 cifs_dbg(FYI, "total data %d smaller than data in frame %d\n",
275 total_data_size, data_in_this_rsp);
279 remaining = total_data_size - data_in_this_rsp;
281 cifs_dbg(FYI, "missing %d bytes from transact2, check next response\n",
283 if (total_data_size > CIFSMaxBufSize) {
284 cifs_dbg(VFS, "TotalDataSize %d is over maximum buffer %d\n",
285 total_data_size, CIFSMaxBufSize);
292 coalesce_t2(char *second_buf, struct smb_hdr *target_hdr)
294 struct smb_t2_rsp *pSMBs = (struct smb_t2_rsp *)second_buf;
295 struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)target_hdr;
296 char *data_area_of_tgt;
297 char *data_area_of_src;
299 unsigned int byte_count, total_in_tgt;
300 __u16 tgt_total_cnt, src_total_cnt, total_in_src;
302 src_total_cnt = get_unaligned_le16(&pSMBs->t2_rsp.TotalDataCount);
303 tgt_total_cnt = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount);
305 if (tgt_total_cnt != src_total_cnt)
306 cifs_dbg(FYI, "total data count of primary and secondary t2 differ source=%hu target=%hu\n",
307 src_total_cnt, tgt_total_cnt);
309 total_in_tgt = get_unaligned_le16(&pSMBt->t2_rsp.DataCount);
311 remaining = tgt_total_cnt - total_in_tgt;
314 cifs_dbg(FYI, "Server sent too much data. tgt_total_cnt=%hu total_in_tgt=%u\n",
315 tgt_total_cnt, total_in_tgt);
319 if (remaining == 0) {
320 /* nothing to do, ignore */
321 cifs_dbg(FYI, "no more data remains\n");
325 total_in_src = get_unaligned_le16(&pSMBs->t2_rsp.DataCount);
326 if (remaining < total_in_src)
327 cifs_dbg(FYI, "transact2 2nd response contains too much data\n");
329 /* find end of first SMB data area */
330 data_area_of_tgt = (char *)&pSMBt->hdr.Protocol +
331 get_unaligned_le16(&pSMBt->t2_rsp.DataOffset);
333 /* validate target area */
334 data_area_of_src = (char *)&pSMBs->hdr.Protocol +
335 get_unaligned_le16(&pSMBs->t2_rsp.DataOffset);
337 data_area_of_tgt += total_in_tgt;
339 total_in_tgt += total_in_src;
340 /* is the result too big for the field? */
341 if (total_in_tgt > USHRT_MAX) {
342 cifs_dbg(FYI, "coalesced DataCount too large (%u)\n",
346 put_unaligned_le16(total_in_tgt, &pSMBt->t2_rsp.DataCount);
349 byte_count = get_bcc(target_hdr);
350 byte_count += total_in_src;
351 /* is the result too big for the field? */
352 if (byte_count > USHRT_MAX) {
353 cifs_dbg(FYI, "coalesced BCC too large (%u)\n", byte_count);
356 put_bcc(byte_count, target_hdr);
358 byte_count = be32_to_cpu(target_hdr->smb_buf_length);
359 byte_count += total_in_src;
360 /* don't allow buffer to overflow */
361 if (byte_count > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) {
362 cifs_dbg(FYI, "coalesced BCC exceeds buffer size (%u)\n",
366 target_hdr->smb_buf_length = cpu_to_be32(byte_count);
368 /* copy second buffer into end of first buffer */
369 memcpy(data_area_of_tgt, data_area_of_src, total_in_src);
371 if (remaining != total_in_src) {
372 /* more responses to go */
373 cifs_dbg(FYI, "waiting for more secondary responses\n");
378 cifs_dbg(FYI, "found the last secondary response\n");
383 cifs_downgrade_oplock(struct TCP_Server_Info *server,
384 struct cifsInodeInfo *cinode, __u32 oplock,
385 unsigned int epoch, bool *purge_cache)
387 cifs_set_oplock_level(cinode, oplock);
391 cifs_check_trans2(struct mid_q_entry *mid, struct TCP_Server_Info *server,
392 char *buf, int malformed)
396 if (check2ndT2(buf) <= 0)
398 mid->multiRsp = true;
400 /* merge response - fix up 1st*/
401 malformed = coalesce_t2(buf, mid->resp_buf);
404 /* All parts received or packet is malformed. */
405 mid->multiEnd = true;
406 dequeue_mid(mid, malformed);
409 if (!server->large_buf) {
410 /*FIXME: switch to already allocated largebuf?*/
411 cifs_dbg(VFS, "1st trans2 resp needs bigbuf\n");
413 /* Have first buffer */
415 mid->large_buf = true;
416 server->bigbuf = NULL;
422 cifs_need_neg(struct TCP_Server_Info *server)
424 return server->maxBuf == 0;
428 cifs_negotiate(const unsigned int xid, struct cifs_ses *ses)
431 rc = CIFSSMBNegotiate(xid, ses);
433 /* retry only once on 1st time connection */
434 set_credits(ses->server, 1);
435 rc = CIFSSMBNegotiate(xid, ses);
443 cifs_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
445 __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
446 struct TCP_Server_Info *server = tcon->ses->server;
449 /* start with specified wsize, or default */
450 if (volume_info->wsize)
451 wsize = volume_info->wsize;
452 else if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_WRITE_CAP))
453 wsize = CIFS_DEFAULT_IOSIZE;
455 wsize = CIFS_DEFAULT_NON_POSIX_WSIZE;
457 /* can server support 24-bit write sizes? (via UNIX extensions) */
458 if (!tcon->unix_ext || !(unix_cap & CIFS_UNIX_LARGE_WRITE_CAP))
459 wsize = min_t(unsigned int, wsize, CIFS_MAX_RFC1002_WSIZE);
462 * no CAP_LARGE_WRITE_X or is signing enabled without CAP_UNIX set?
463 * Limit it to max buffer offered by the server, minus the size of the
464 * WRITEX header, not including the 4 byte RFC1001 length.
466 if (!(server->capabilities & CAP_LARGE_WRITE_X) ||
467 (!(server->capabilities & CAP_UNIX) && server->sign))
468 wsize = min_t(unsigned int, wsize,
469 server->maxBuf - sizeof(WRITE_REQ) + 4);
471 /* hard limit of CIFS_MAX_WSIZE */
472 wsize = min_t(unsigned int, wsize, CIFS_MAX_WSIZE);
478 cifs_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
480 __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
481 struct TCP_Server_Info *server = tcon->ses->server;
482 unsigned int rsize, defsize;
485 * Set default value...
487 * HACK alert! Ancient servers have very small buffers. Even though
488 * MS-CIFS indicates that servers are only limited by the client's
489 * bufsize for reads, testing against win98se shows that it throws
490 * INVALID_PARAMETER errors if you try to request too large a read.
491 * OS/2 just sends back short reads.
493 * If the server doesn't advertise CAP_LARGE_READ_X, then assume that
494 * it can't handle a read request larger than its MaxBufferSize either.
496 if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_READ_CAP))
497 defsize = CIFS_DEFAULT_IOSIZE;
498 else if (server->capabilities & CAP_LARGE_READ_X)
499 defsize = CIFS_DEFAULT_NON_POSIX_RSIZE;
501 defsize = server->maxBuf - sizeof(READ_RSP);
503 rsize = volume_info->rsize ? volume_info->rsize : defsize;
506 * no CAP_LARGE_READ_X? Then MS-CIFS states that we must limit this to
507 * the client's MaxBufferSize.
509 if (!(server->capabilities & CAP_LARGE_READ_X))
510 rsize = min_t(unsigned int, CIFSMaxBufSize, rsize);
512 /* hard limit of CIFS_MAX_RSIZE */
513 rsize = min_t(unsigned int, rsize, CIFS_MAX_RSIZE);
519 cifs_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
521 CIFSSMBQFSDeviceInfo(xid, tcon);
522 CIFSSMBQFSAttributeInfo(xid, tcon);
526 cifs_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
527 struct cifs_sb_info *cifs_sb, const char *full_path)
530 FILE_ALL_INFO *file_info;
532 file_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
533 if (file_info == NULL)
536 rc = CIFSSMBQPathInfo(xid, tcon, full_path, file_info,
537 0 /* not legacy */, cifs_sb->local_nls,
538 cifs_remap(cifs_sb));
540 if (rc == -EOPNOTSUPP || rc == -EINVAL)
541 rc = SMBQueryInformation(xid, tcon, full_path, file_info,
542 cifs_sb->local_nls, cifs_remap(cifs_sb));
548 cifs_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
549 struct cifs_sb_info *cifs_sb, const char *full_path,
550 FILE_ALL_INFO *data, bool *adjustTZ, bool *symlink)
556 /* could do find first instead but this returns more info */
557 rc = CIFSSMBQPathInfo(xid, tcon, full_path, data, 0 /* not legacy */,
558 cifs_sb->local_nls, cifs_remap(cifs_sb));
560 * BB optimize code so we do not make the above call when server claims
561 * no NT SMB support and the above call failed at least once - set flag
564 if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
565 rc = SMBQueryInformation(xid, tcon, full_path, data,
567 cifs_remap(cifs_sb));
571 if (!rc && (le32_to_cpu(data->Attributes) & ATTR_REPARSE)) {
575 struct cifs_open_parms oparms;
578 oparms.cifs_sb = cifs_sb;
579 oparms.desired_access = FILE_READ_ATTRIBUTES;
580 oparms.create_options = 0;
581 oparms.disposition = FILE_OPEN;
582 oparms.path = full_path;
584 oparms.reconnect = false;
586 /* Need to check if this is a symbolic link or not */
587 tmprc = CIFS_open(xid, &oparms, &oplock, NULL);
588 if (tmprc == -EOPNOTSUPP)
591 CIFSSMBClose(xid, tcon, fid.netfid);
598 cifs_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
599 struct cifs_sb_info *cifs_sb, const char *full_path,
600 u64 *uniqueid, FILE_ALL_INFO *data)
603 * We can not use the IndexNumber field by default from Windows or
604 * Samba (in ALL_INFO buf) but we can request it explicitly. The SNIA
605 * CIFS spec claims that this value is unique within the scope of a
606 * share, and the windows docs hint that it's actually unique
609 * There may be higher info levels that work but are there Windows
610 * server or network appliances for which IndexNumber field is not
613 return CIFSGetSrvInodeNumber(xid, tcon, full_path, uniqueid,
615 cifs_remap(cifs_sb));
619 cifs_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
620 struct cifs_fid *fid, FILE_ALL_INFO *data)
622 return CIFSSMBQFileInfo(xid, tcon, fid->netfid, data);
626 cifs_clear_stats(struct cifs_tcon *tcon)
628 atomic_set(&tcon->stats.cifs_stats.num_writes, 0);
629 atomic_set(&tcon->stats.cifs_stats.num_reads, 0);
630 atomic_set(&tcon->stats.cifs_stats.num_flushes, 0);
631 atomic_set(&tcon->stats.cifs_stats.num_oplock_brks, 0);
632 atomic_set(&tcon->stats.cifs_stats.num_opens, 0);
633 atomic_set(&tcon->stats.cifs_stats.num_posixopens, 0);
634 atomic_set(&tcon->stats.cifs_stats.num_posixmkdirs, 0);
635 atomic_set(&tcon->stats.cifs_stats.num_closes, 0);
636 atomic_set(&tcon->stats.cifs_stats.num_deletes, 0);
637 atomic_set(&tcon->stats.cifs_stats.num_mkdirs, 0);
638 atomic_set(&tcon->stats.cifs_stats.num_rmdirs, 0);
639 atomic_set(&tcon->stats.cifs_stats.num_renames, 0);
640 atomic_set(&tcon->stats.cifs_stats.num_t2renames, 0);
641 atomic_set(&tcon->stats.cifs_stats.num_ffirst, 0);
642 atomic_set(&tcon->stats.cifs_stats.num_fnext, 0);
643 atomic_set(&tcon->stats.cifs_stats.num_fclose, 0);
644 atomic_set(&tcon->stats.cifs_stats.num_hardlinks, 0);
645 atomic_set(&tcon->stats.cifs_stats.num_symlinks, 0);
646 atomic_set(&tcon->stats.cifs_stats.num_locks, 0);
647 atomic_set(&tcon->stats.cifs_stats.num_acl_get, 0);
648 atomic_set(&tcon->stats.cifs_stats.num_acl_set, 0);
652 cifs_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
654 seq_printf(m, " Oplocks breaks: %d",
655 atomic_read(&tcon->stats.cifs_stats.num_oplock_brks));
656 seq_printf(m, "\nReads: %d Bytes: %llu",
657 atomic_read(&tcon->stats.cifs_stats.num_reads),
658 (long long)(tcon->bytes_read));
659 seq_printf(m, "\nWrites: %d Bytes: %llu",
660 atomic_read(&tcon->stats.cifs_stats.num_writes),
661 (long long)(tcon->bytes_written));
662 seq_printf(m, "\nFlushes: %d",
663 atomic_read(&tcon->stats.cifs_stats.num_flushes));
664 seq_printf(m, "\nLocks: %d HardLinks: %d Symlinks: %d",
665 atomic_read(&tcon->stats.cifs_stats.num_locks),
666 atomic_read(&tcon->stats.cifs_stats.num_hardlinks),
667 atomic_read(&tcon->stats.cifs_stats.num_symlinks));
668 seq_printf(m, "\nOpens: %d Closes: %d Deletes: %d",
669 atomic_read(&tcon->stats.cifs_stats.num_opens),
670 atomic_read(&tcon->stats.cifs_stats.num_closes),
671 atomic_read(&tcon->stats.cifs_stats.num_deletes));
672 seq_printf(m, "\nPosix Opens: %d Posix Mkdirs: %d",
673 atomic_read(&tcon->stats.cifs_stats.num_posixopens),
674 atomic_read(&tcon->stats.cifs_stats.num_posixmkdirs));
675 seq_printf(m, "\nMkdirs: %d Rmdirs: %d",
676 atomic_read(&tcon->stats.cifs_stats.num_mkdirs),
677 atomic_read(&tcon->stats.cifs_stats.num_rmdirs));
678 seq_printf(m, "\nRenames: %d T2 Renames %d",
679 atomic_read(&tcon->stats.cifs_stats.num_renames),
680 atomic_read(&tcon->stats.cifs_stats.num_t2renames));
681 seq_printf(m, "\nFindFirst: %d FNext %d FClose %d",
682 atomic_read(&tcon->stats.cifs_stats.num_ffirst),
683 atomic_read(&tcon->stats.cifs_stats.num_fnext),
684 atomic_read(&tcon->stats.cifs_stats.num_fclose));
688 cifs_mkdir_setinfo(struct inode *inode, const char *full_path,
689 struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
690 const unsigned int xid)
692 FILE_BASIC_INFO info;
693 struct cifsInodeInfo *cifsInode;
697 memset(&info, 0, sizeof(info));
698 cifsInode = CIFS_I(inode);
699 dosattrs = cifsInode->cifsAttrs|ATTR_READONLY;
700 info.Attributes = cpu_to_le32(dosattrs);
701 rc = CIFSSMBSetPathInfo(xid, tcon, full_path, &info, cifs_sb->local_nls,
702 cifs_remap(cifs_sb));
704 cifsInode->cifsAttrs = dosattrs;
708 cifs_open_file(const unsigned int xid, struct cifs_open_parms *oparms,
709 __u32 *oplock, FILE_ALL_INFO *buf)
711 if (!(oparms->tcon->ses->capabilities & CAP_NT_SMBS))
712 return SMBLegacyOpen(xid, oparms->tcon, oparms->path,
714 oparms->desired_access,
715 oparms->create_options,
716 &oparms->fid->netfid, oplock, buf,
717 oparms->cifs_sb->local_nls,
718 cifs_remap(oparms->cifs_sb));
719 return CIFS_open(xid, oparms, oplock, buf);
723 cifs_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
725 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
726 cfile->fid.netfid = fid->netfid;
727 cifs_set_oplock_level(cinode, oplock);
728 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
732 cifs_close_file(const unsigned int xid, struct cifs_tcon *tcon,
733 struct cifs_fid *fid)
735 CIFSSMBClose(xid, tcon, fid->netfid);
739 cifs_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
740 struct cifs_fid *fid)
742 return CIFSSMBFlush(xid, tcon, fid->netfid);
746 cifs_sync_read(const unsigned int xid, struct cifs_fid *pfid,
747 struct cifs_io_parms *parms, unsigned int *bytes_read,
748 char **buf, int *buf_type)
750 parms->netfid = pfid->netfid;
751 return CIFSSMBRead(xid, parms, bytes_read, buf, buf_type);
755 cifs_sync_write(const unsigned int xid, struct cifs_fid *pfid,
756 struct cifs_io_parms *parms, unsigned int *written,
757 struct kvec *iov, unsigned long nr_segs)
760 parms->netfid = pfid->netfid;
761 return CIFSSMBWrite2(xid, parms, written, iov, nr_segs);
765 smb_set_file_info(struct inode *inode, const char *full_path,
766 FILE_BASIC_INFO *buf, const unsigned int xid)
772 struct cifs_open_parms oparms;
773 struct cifsFileInfo *open_file;
774 struct cifsInodeInfo *cinode = CIFS_I(inode);
775 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
776 struct tcon_link *tlink = NULL;
777 struct cifs_tcon *tcon;
779 /* if the file is already open for write, just use that fileid */
780 open_file = find_writable_file(cinode, true);
782 fid.netfid = open_file->fid.netfid;
783 netpid = open_file->pid;
784 tcon = tlink_tcon(open_file->tlink);
785 goto set_via_filehandle;
788 tlink = cifs_sb_tlink(cifs_sb);
794 tcon = tlink_tcon(tlink);
796 rc = CIFSSMBSetPathInfo(xid, tcon, full_path, buf, cifs_sb->local_nls,
797 cifs_remap(cifs_sb));
799 cinode->cifsAttrs = le32_to_cpu(buf->Attributes);
801 } else if (rc != -EOPNOTSUPP && rc != -EINVAL) {
806 oparms.cifs_sb = cifs_sb;
807 oparms.desired_access = SYNCHRONIZE | FILE_WRITE_ATTRIBUTES;
808 oparms.create_options = CREATE_NOT_DIR;
809 oparms.disposition = FILE_OPEN;
810 oparms.path = full_path;
812 oparms.reconnect = false;
814 cifs_dbg(FYI, "calling SetFileInfo since SetPathInfo for times not supported by this server\n");
815 rc = CIFS_open(xid, &oparms, &oplock, NULL);
822 netpid = current->tgid;
825 rc = CIFSSMBSetFileInfo(xid, tcon, buf, fid.netfid, netpid);
827 cinode->cifsAttrs = le32_to_cpu(buf->Attributes);
829 if (open_file == NULL)
830 CIFSSMBClose(xid, tcon, fid.netfid);
832 cifsFileInfo_put(open_file);
835 cifs_put_tlink(tlink);
840 cifs_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
841 struct cifsFileInfo *cfile)
843 return CIFSSMB_set_compression(xid, tcon, cfile->fid.netfid);
847 cifs_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
848 const char *path, struct cifs_sb_info *cifs_sb,
849 struct cifs_fid *fid, __u16 search_flags,
850 struct cifs_search_info *srch_inf)
854 rc = CIFSFindFirst(xid, tcon, path, cifs_sb,
855 &fid->netfid, search_flags, srch_inf, true);
857 cifs_dbg(FYI, "find first failed=%d\n", rc);
862 cifs_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
863 struct cifs_fid *fid, __u16 search_flags,
864 struct cifs_search_info *srch_inf)
866 return CIFSFindNext(xid, tcon, fid->netfid, search_flags, srch_inf);
870 cifs_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
871 struct cifs_fid *fid)
873 return CIFSFindClose(xid, tcon, fid->netfid);
877 cifs_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
878 struct cifsInodeInfo *cinode)
880 return CIFSSMBLock(0, tcon, fid->netfid, current->tgid, 0, 0, 0, 0,
881 LOCKING_ANDX_OPLOCK_RELEASE, false,
882 CIFS_CACHE_READ(cinode) ? 1 : 0);
886 cifs_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
889 int rc = -EOPNOTSUPP;
891 buf->f_type = CIFS_MAGIC_NUMBER;
894 * We could add a second check for a QFS Unix capability bit
896 if ((tcon->ses->capabilities & CAP_UNIX) &&
897 (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
898 rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
901 * Only need to call the old QFSInfo if failed on newer one,
904 if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
905 rc = CIFSSMBQFSInfo(xid, tcon, buf);
908 * Some old Windows servers also do not support level 103, retry with
909 * older level one if old server failed the previous call or we
910 * bypassed it because we detected that this was an older LANMAN sess
913 rc = SMBOldQFSInfo(xid, tcon, buf);
918 cifs_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
919 __u64 length, __u32 type, int lock, int unlock, bool wait)
921 return CIFSSMBLock(xid, tlink_tcon(cfile->tlink), cfile->fid.netfid,
922 current->tgid, length, offset, unlock, lock,
923 (__u8)type, wait, 0);
927 cifs_unix_dfs_readlink(const unsigned int xid, struct cifs_tcon *tcon,
928 const unsigned char *searchName, char **symlinkinfo,
929 const struct nls_table *nls_codepage)
931 #ifdef CONFIG_CIFS_DFS_UPCALL
933 unsigned int num_referrals = 0;
934 struct dfs_info3_param *referrals = NULL;
936 rc = get_dfs_path(xid, tcon->ses, searchName, nls_codepage,
937 &num_referrals, &referrals, 0);
939 if (!rc && num_referrals > 0) {
940 *symlinkinfo = kstrndup(referrals->node_name,
941 strlen(referrals->node_name),
945 free_dfs_info_array(referrals, num_referrals);
948 #else /* No DFS support */
954 cifs_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
955 const char *full_path, char **target_path,
956 struct cifs_sb_info *cifs_sb)
961 struct cifs_open_parms oparms;
963 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
965 /* Check for unix extensions */
966 if (cap_unix(tcon->ses)) {
967 rc = CIFSSMBUnixQuerySymLink(xid, tcon, full_path, target_path,
969 cifs_remap(cifs_sb));
971 rc = cifs_unix_dfs_readlink(xid, tcon, full_path,
979 oparms.cifs_sb = cifs_sb;
980 oparms.desired_access = FILE_READ_ATTRIBUTES;
981 oparms.create_options = OPEN_REPARSE_POINT;
982 oparms.disposition = FILE_OPEN;
983 oparms.path = full_path;
985 oparms.reconnect = false;
987 rc = CIFS_open(xid, &oparms, &oplock, NULL);
991 rc = CIFSSMBQuerySymLink(xid, tcon, fid.netfid, target_path,
996 convert_delimiter(*target_path, '/');
998 CIFSSMBClose(xid, tcon, fid.netfid);
1001 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1006 cifs_is_read_op(__u32 oplock)
1008 return oplock == OPLOCK_READ;
1012 cifs_wp_retry_size(struct inode *inode)
1014 return CIFS_SB(inode->i_sb)->wsize;
1018 cifs_dir_needs_close(struct cifsFileInfo *cfile)
1020 return !cfile->srch_inf.endOfSearch && !cfile->invalidHandle;
1024 cifs_can_echo(struct TCP_Server_Info *server)
1026 if (server->tcpStatus == CifsGood)
1032 struct smb_version_operations smb1_operations = {
1033 .send_cancel = send_nt_cancel,
1034 .compare_fids = cifs_compare_fids,
1035 .setup_request = cifs_setup_request,
1036 .setup_async_request = cifs_setup_async_request,
1037 .check_receive = cifs_check_receive,
1038 .add_credits = cifs_add_credits,
1039 .set_credits = cifs_set_credits,
1040 .get_credits_field = cifs_get_credits_field,
1041 .get_credits = cifs_get_credits,
1042 .wait_mtu_credits = cifs_wait_mtu_credits,
1043 .get_next_mid = cifs_get_next_mid,
1044 .read_data_offset = cifs_read_data_offset,
1045 .read_data_length = cifs_read_data_length,
1046 .map_error = map_smb_to_linux_error,
1047 .find_mid = cifs_find_mid,
1048 .check_message = checkSMB,
1049 .dump_detail = cifs_dump_detail,
1050 .clear_stats = cifs_clear_stats,
1051 .print_stats = cifs_print_stats,
1052 .is_oplock_break = is_valid_oplock_break,
1053 .downgrade_oplock = cifs_downgrade_oplock,
1054 .check_trans2 = cifs_check_trans2,
1055 .need_neg = cifs_need_neg,
1056 .negotiate = cifs_negotiate,
1057 .negotiate_wsize = cifs_negotiate_wsize,
1058 .negotiate_rsize = cifs_negotiate_rsize,
1059 .sess_setup = CIFS_SessSetup,
1060 .logoff = CIFSSMBLogoff,
1061 .tree_connect = CIFSTCon,
1062 .tree_disconnect = CIFSSMBTDis,
1063 .get_dfs_refer = CIFSGetDFSRefer,
1064 .qfs_tcon = cifs_qfs_tcon,
1065 .is_path_accessible = cifs_is_path_accessible,
1066 .can_echo = cifs_can_echo,
1067 .query_path_info = cifs_query_path_info,
1068 .query_file_info = cifs_query_file_info,
1069 .get_srv_inum = cifs_get_srv_inum,
1070 .set_path_size = CIFSSMBSetEOF,
1071 .set_file_size = CIFSSMBSetFileSize,
1072 .set_file_info = smb_set_file_info,
1073 .set_compression = cifs_set_compression,
1074 .echo = CIFSSMBEcho,
1075 .mkdir = CIFSSMBMkDir,
1076 .mkdir_setinfo = cifs_mkdir_setinfo,
1077 .rmdir = CIFSSMBRmDir,
1078 .unlink = CIFSSMBDelFile,
1079 .rename_pending_delete = cifs_rename_pending_delete,
1080 .rename = CIFSSMBRename,
1081 .create_hardlink = CIFSCreateHardLink,
1082 .query_symlink = cifs_query_symlink,
1083 .open = cifs_open_file,
1084 .set_fid = cifs_set_fid,
1085 .close = cifs_close_file,
1086 .flush = cifs_flush_file,
1087 .async_readv = cifs_async_readv,
1088 .async_writev = cifs_async_writev,
1089 .sync_read = cifs_sync_read,
1090 .sync_write = cifs_sync_write,
1091 .query_dir_first = cifs_query_dir_first,
1092 .query_dir_next = cifs_query_dir_next,
1093 .close_dir = cifs_close_dir,
1094 .calc_smb_size = smbCalcSize,
1095 .oplock_response = cifs_oplock_response,
1096 .queryfs = cifs_queryfs,
1097 .mand_lock = cifs_mand_lock,
1098 .mand_unlock_range = cifs_unlock_range,
1099 .push_mand_locks = cifs_push_mandatory_locks,
1100 .query_mf_symlink = cifs_query_mf_symlink,
1101 .create_mf_symlink = cifs_create_mf_symlink,
1102 .is_read_op = cifs_is_read_op,
1103 .wp_retry_size = cifs_wp_retry_size,
1104 .dir_needs_close = cifs_dir_needs_close,
1105 .select_sectype = cifs_select_sectype,
1106 #ifdef CONFIG_CIFS_XATTR
1107 .query_all_EAs = CIFSSMBQAllEAs,
1108 .set_EA = CIFSSMBSetEA,
1109 #endif /* CIFS_XATTR */
1110 #ifdef CONFIG_CIFS_ACL
1111 .get_acl = get_cifs_acl,
1112 .get_acl_by_fid = get_cifs_acl_by_fid,
1113 .set_acl = set_cifs_acl,
1114 #endif /* CIFS_ACL */
1117 struct smb_version_values smb1_values = {
1118 .version_string = SMB1_VERSION_STRING,
1119 .large_lock_type = LOCKING_ANDX_LARGE_FILES,
1120 .exclusive_lock_type = 0,
1121 .shared_lock_type = LOCKING_ANDX_SHARED_LOCK,
1122 .unlock_lock_type = 0,
1123 .header_preamble_size = 4,
1124 .header_size = sizeof(struct smb_hdr),
1125 .max_header_size = MAX_CIFS_HDR_SIZE,
1126 .read_rsp_size = sizeof(READ_RSP),
1127 .lock_cmd = cpu_to_le16(SMB_COM_LOCKING_ANDX),
1128 .cap_unix = CAP_UNIX,
1129 .cap_nt_find = CAP_NT_SMBS | CAP_NT_FIND,
1130 .cap_large_files = CAP_LARGE_FILES,
1131 .signing_enabled = SECMODE_SIGN_ENABLED,
1132 .signing_required = SECMODE_SIGN_REQUIRED,