1 // SPDX-License-Identifier: GPL-2.0-only
3 * SMB1 (CIFS) version specific operations
8 #include <linux/pagemap.h>
10 #include <uapi/linux/magic.h>
12 #include "cifsproto.h"
13 #include "cifs_debug.h"
15 #include "cifs_unicode.h"
16 #include "fs_context.h"
19 * An NT cancel request header looks just like the original request except:
21 * The Command is SMB_COM_NT_CANCEL
22 * The WordCount is zeroed out
23 * The ByteCount is zeroed out
25 * This function mangles an existing request buffer into a
26 * SMB_COM_NT_CANCEL request and then sends it.
29 send_nt_cancel(struct TCP_Server_Info *server, struct smb_rqst *rqst,
30 struct mid_q_entry *mid)
33 struct smb_hdr *in_buf = (struct smb_hdr *)rqst->rq_iov[0].iov_base;
35 /* -4 for RFC1001 length and +2 for BCC field */
36 in_buf->smb_buf_length = cpu_to_be32(sizeof(struct smb_hdr) - 4 + 2);
37 in_buf->Command = SMB_COM_NT_CANCEL;
38 in_buf->WordCount = 0;
41 mutex_lock(&server->srv_mutex);
42 rc = cifs_sign_smb(in_buf, server, &mid->sequence_number);
44 mutex_unlock(&server->srv_mutex);
49 * The response to this call was already factored into the sequence
50 * number when the call went out, so we must adjust it back downward
53 --server->sequence_number;
54 rc = smb_send(server, in_buf, be32_to_cpu(in_buf->smb_buf_length));
56 server->sequence_number--;
58 mutex_unlock(&server->srv_mutex);
60 cifs_dbg(FYI, "issued NT_CANCEL for mid %u, rc = %d\n",
67 cifs_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
69 return ob1->fid.netfid == ob2->fid.netfid;
73 cifs_read_data_offset(char *buf)
75 READ_RSP *rsp = (READ_RSP *)buf;
76 return le16_to_cpu(rsp->DataOffset);
80 cifs_read_data_length(char *buf, bool in_remaining)
82 READ_RSP *rsp = (READ_RSP *)buf;
83 /* It's a bug reading remaining data for SMB1 packets */
84 WARN_ON(in_remaining);
85 return (le16_to_cpu(rsp->DataLengthHigh) << 16) +
86 le16_to_cpu(rsp->DataLength);
89 static struct mid_q_entry *
90 cifs_find_mid(struct TCP_Server_Info *server, char *buffer)
92 struct smb_hdr *buf = (struct smb_hdr *)buffer;
93 struct mid_q_entry *mid;
95 spin_lock(&GlobalMid_Lock);
96 list_for_each_entry(mid, &server->pending_mid_q, qhead) {
97 if (compare_mid(mid->mid, buf) &&
98 mid->mid_state == MID_REQUEST_SUBMITTED &&
99 le16_to_cpu(mid->command) == buf->Command) {
100 kref_get(&mid->refcount);
101 spin_unlock(&GlobalMid_Lock);
105 spin_unlock(&GlobalMid_Lock);
110 cifs_add_credits(struct TCP_Server_Info *server,
111 const struct cifs_credits *credits, const int optype)
113 spin_lock(&server->req_lock);
114 server->credits += credits->value;
116 spin_unlock(&server->req_lock);
117 wake_up(&server->request_q);
121 cifs_set_credits(struct TCP_Server_Info *server, const int val)
123 spin_lock(&server->req_lock);
124 server->credits = val;
125 server->oplocks = val > 1 ? enable_oplocks : false;
126 spin_unlock(&server->req_lock);
130 cifs_get_credits_field(struct TCP_Server_Info *server, const int optype)
132 return &server->credits;
136 cifs_get_credits(struct mid_q_entry *mid)
142 * Find a free multiplex id (SMB mid). Otherwise there could be
143 * mid collisions which might cause problems, demultiplexing the
144 * wrong response to this request. Multiplex ids could collide if
145 * one of a series requests takes much longer than the others, or
146 * if a very large number of long lived requests (byte range
147 * locks or FindNotify requests) are pending. No more than
148 * 64K-1 requests can be outstanding at one time. If no
149 * mids are available, return zero. A future optimization
150 * could make the combination of mids and uid the key we use
151 * to demultiplex on (rather than mid alone).
152 * In addition to the above check, the cifs demultiplex
153 * code already used the command code as a secondary
154 * check of the frame and if signing is negotiated the
155 * response would be discarded if the mid were the same
156 * but the signature was wrong. Since the mid is not put in the
157 * pending queue until later (when it is about to be dispatched)
158 * we do have to limit the number of outstanding requests
159 * to somewhat less than 64K-1 although it is hard to imagine
160 * so many threads being in the vfs at one time.
163 cifs_get_next_mid(struct TCP_Server_Info *server)
166 __u16 last_mid, cur_mid;
167 bool collision, reconnect = false;
169 spin_lock(&GlobalMid_Lock);
171 /* mid is 16 bit only for CIFS/SMB */
172 cur_mid = (__u16)((server->CurrentMid) & 0xffff);
173 /* we do not want to loop forever */
176 /* avoid 0xFFFF MID */
177 if (cur_mid == 0xffff)
181 * This nested loop looks more expensive than it is.
182 * In practice the list of pending requests is short,
183 * fewer than 50, and the mids are likely to be unique
184 * on the first pass through the loop unless some request
185 * takes longer than the 64 thousand requests before it
186 * (and it would also have to have been a request that
189 while (cur_mid != last_mid) {
190 struct mid_q_entry *mid_entry;
191 unsigned int num_mids;
198 list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
200 if (mid_entry->mid == cur_mid &&
201 mid_entry->mid_state == MID_REQUEST_SUBMITTED) {
202 /* This mid is in use, try a different one */
209 * if we have more than 32k mids in the list, then something
210 * is very wrong. Possibly a local user is trying to DoS the
211 * box by issuing long-running calls and SIGKILL'ing them. If
212 * we get to 2^16 mids then we're in big trouble as this
213 * function could loop forever.
215 * Go ahead and assign out the mid in this situation, but force
216 * an eventual reconnect to clean out the pending_mid_q.
218 if (num_mids > 32768)
222 mid = (__u64)cur_mid;
223 server->CurrentMid = mid;
228 spin_unlock(&GlobalMid_Lock);
231 spin_lock(&cifs_tcp_ses_lock);
232 server->tcpStatus = CifsNeedReconnect;
233 spin_unlock(&cifs_tcp_ses_lock);
241 0 not a transact2, or all data present
242 >0 transact2 with that much data missing
243 -EINVAL invalid transact2
246 check2ndT2(char *buf)
248 struct smb_hdr *pSMB = (struct smb_hdr *)buf;
249 struct smb_t2_rsp *pSMBt;
251 __u16 total_data_size, data_in_this_rsp;
253 if (pSMB->Command != SMB_COM_TRANSACTION2)
256 /* check for plausible wct, bcc and t2 data and parm sizes */
257 /* check for parm and data offset going beyond end of smb */
258 if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
259 cifs_dbg(FYI, "Invalid transact2 word count\n");
263 pSMBt = (struct smb_t2_rsp *)pSMB;
265 total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount);
266 data_in_this_rsp = get_unaligned_le16(&pSMBt->t2_rsp.DataCount);
268 if (total_data_size == data_in_this_rsp)
270 else if (total_data_size < data_in_this_rsp) {
271 cifs_dbg(FYI, "total data %d smaller than data in frame %d\n",
272 total_data_size, data_in_this_rsp);
276 remaining = total_data_size - data_in_this_rsp;
278 cifs_dbg(FYI, "missing %d bytes from transact2, check next response\n",
280 if (total_data_size > CIFSMaxBufSize) {
281 cifs_dbg(VFS, "TotalDataSize %d is over maximum buffer %d\n",
282 total_data_size, CIFSMaxBufSize);
289 coalesce_t2(char *second_buf, struct smb_hdr *target_hdr)
291 struct smb_t2_rsp *pSMBs = (struct smb_t2_rsp *)second_buf;
292 struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)target_hdr;
293 char *data_area_of_tgt;
294 char *data_area_of_src;
296 unsigned int byte_count, total_in_tgt;
297 __u16 tgt_total_cnt, src_total_cnt, total_in_src;
299 src_total_cnt = get_unaligned_le16(&pSMBs->t2_rsp.TotalDataCount);
300 tgt_total_cnt = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount);
302 if (tgt_total_cnt != src_total_cnt)
303 cifs_dbg(FYI, "total data count of primary and secondary t2 differ source=%hu target=%hu\n",
304 src_total_cnt, tgt_total_cnt);
306 total_in_tgt = get_unaligned_le16(&pSMBt->t2_rsp.DataCount);
308 remaining = tgt_total_cnt - total_in_tgt;
311 cifs_dbg(FYI, "Server sent too much data. tgt_total_cnt=%hu total_in_tgt=%u\n",
312 tgt_total_cnt, total_in_tgt);
316 if (remaining == 0) {
317 /* nothing to do, ignore */
318 cifs_dbg(FYI, "no more data remains\n");
322 total_in_src = get_unaligned_le16(&pSMBs->t2_rsp.DataCount);
323 if (remaining < total_in_src)
324 cifs_dbg(FYI, "transact2 2nd response contains too much data\n");
326 /* find end of first SMB data area */
327 data_area_of_tgt = (char *)&pSMBt->hdr.Protocol +
328 get_unaligned_le16(&pSMBt->t2_rsp.DataOffset);
330 /* validate target area */
331 data_area_of_src = (char *)&pSMBs->hdr.Protocol +
332 get_unaligned_le16(&pSMBs->t2_rsp.DataOffset);
334 data_area_of_tgt += total_in_tgt;
336 total_in_tgt += total_in_src;
337 /* is the result too big for the field? */
338 if (total_in_tgt > USHRT_MAX) {
339 cifs_dbg(FYI, "coalesced DataCount too large (%u)\n",
343 put_unaligned_le16(total_in_tgt, &pSMBt->t2_rsp.DataCount);
346 byte_count = get_bcc(target_hdr);
347 byte_count += total_in_src;
348 /* is the result too big for the field? */
349 if (byte_count > USHRT_MAX) {
350 cifs_dbg(FYI, "coalesced BCC too large (%u)\n", byte_count);
353 put_bcc(byte_count, target_hdr);
355 byte_count = be32_to_cpu(target_hdr->smb_buf_length);
356 byte_count += total_in_src;
357 /* don't allow buffer to overflow */
358 if (byte_count > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) {
359 cifs_dbg(FYI, "coalesced BCC exceeds buffer size (%u)\n",
363 target_hdr->smb_buf_length = cpu_to_be32(byte_count);
365 /* copy second buffer into end of first buffer */
366 memcpy(data_area_of_tgt, data_area_of_src, total_in_src);
368 if (remaining != total_in_src) {
369 /* more responses to go */
370 cifs_dbg(FYI, "waiting for more secondary responses\n");
375 cifs_dbg(FYI, "found the last secondary response\n");
380 cifs_downgrade_oplock(struct TCP_Server_Info *server,
381 struct cifsInodeInfo *cinode, __u32 oplock,
382 unsigned int epoch, bool *purge_cache)
384 cifs_set_oplock_level(cinode, oplock);
388 cifs_check_trans2(struct mid_q_entry *mid, struct TCP_Server_Info *server,
389 char *buf, int malformed)
393 if (check2ndT2(buf) <= 0)
395 mid->multiRsp = true;
397 /* merge response - fix up 1st*/
398 malformed = coalesce_t2(buf, mid->resp_buf);
401 /* All parts received or packet is malformed. */
402 mid->multiEnd = true;
403 dequeue_mid(mid, malformed);
406 if (!server->large_buf) {
407 /*FIXME: switch to already allocated largebuf?*/
408 cifs_dbg(VFS, "1st trans2 resp needs bigbuf\n");
410 /* Have first buffer */
412 mid->large_buf = true;
413 server->bigbuf = NULL;
419 cifs_need_neg(struct TCP_Server_Info *server)
421 return server->maxBuf == 0;
425 cifs_negotiate(const unsigned int xid,
426 struct cifs_ses *ses,
427 struct TCP_Server_Info *server)
430 rc = CIFSSMBNegotiate(xid, ses, server);
432 /* retry only once on 1st time connection */
433 set_credits(server, 1);
434 rc = CIFSSMBNegotiate(xid, ses, server);
442 cifs_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
444 __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
445 struct TCP_Server_Info *server = tcon->ses->server;
448 /* start with specified wsize, or default */
451 else if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_WRITE_CAP))
452 wsize = CIFS_DEFAULT_IOSIZE;
454 wsize = CIFS_DEFAULT_NON_POSIX_WSIZE;
456 /* can server support 24-bit write sizes? (via UNIX extensions) */
457 if (!tcon->unix_ext || !(unix_cap & CIFS_UNIX_LARGE_WRITE_CAP))
458 wsize = min_t(unsigned int, wsize, CIFS_MAX_RFC1002_WSIZE);
461 * no CAP_LARGE_WRITE_X or is signing enabled without CAP_UNIX set?
462 * Limit it to max buffer offered by the server, minus the size of the
463 * WRITEX header, not including the 4 byte RFC1001 length.
465 if (!(server->capabilities & CAP_LARGE_WRITE_X) ||
466 (!(server->capabilities & CAP_UNIX) && server->sign))
467 wsize = min_t(unsigned int, wsize,
468 server->maxBuf - sizeof(WRITE_REQ) + 4);
470 /* hard limit of CIFS_MAX_WSIZE */
471 wsize = min_t(unsigned int, wsize, CIFS_MAX_WSIZE);
477 cifs_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
479 __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
480 struct TCP_Server_Info *server = tcon->ses->server;
481 unsigned int rsize, defsize;
484 * Set default value...
486 * HACK alert! Ancient servers have very small buffers. Even though
487 * MS-CIFS indicates that servers are only limited by the client's
488 * bufsize for reads, testing against win98se shows that it throws
489 * INVALID_PARAMETER errors if you try to request too large a read.
490 * OS/2 just sends back short reads.
492 * If the server doesn't advertise CAP_LARGE_READ_X, then assume that
493 * it can't handle a read request larger than its MaxBufferSize either.
495 if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_READ_CAP))
496 defsize = CIFS_DEFAULT_IOSIZE;
497 else if (server->capabilities & CAP_LARGE_READ_X)
498 defsize = CIFS_DEFAULT_NON_POSIX_RSIZE;
500 defsize = server->maxBuf - sizeof(READ_RSP);
502 rsize = ctx->rsize ? ctx->rsize : defsize;
505 * no CAP_LARGE_READ_X? Then MS-CIFS states that we must limit this to
506 * the client's MaxBufferSize.
508 if (!(server->capabilities & CAP_LARGE_READ_X))
509 rsize = min_t(unsigned int, CIFSMaxBufSize, rsize);
511 /* hard limit of CIFS_MAX_RSIZE */
512 rsize = min_t(unsigned int, rsize, CIFS_MAX_RSIZE);
518 cifs_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
519 struct cifs_sb_info *cifs_sb)
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 = cifs_create_options(cifs_sb, 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,
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, FIND_WR_FSUID_ONLY);
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,
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 = cifs_create_options(cifs_sb, 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,
887 struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
889 int rc = -EOPNOTSUPP;
891 buf->f_type = CIFS_SUPER_MAGIC;
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 struct dfs_info3_param referral = {0};
935 rc = get_dfs_path(xid, tcon->ses, searchName, nls_codepage, &referral,
939 *symlinkinfo = kstrdup(referral.node_name, GFP_KERNEL);
940 free_dfs_info_param(&referral);
945 #else /* No DFS support */
951 cifs_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
952 struct cifs_sb_info *cifs_sb, const char *full_path,
953 char **target_path, bool is_reparse_point)
958 struct cifs_open_parms oparms;
960 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
962 if (is_reparse_point) {
963 cifs_dbg(VFS, "reparse points not handled for SMB1 symlinks\n");
967 /* Check for unix extensions */
968 if (cap_unix(tcon->ses)) {
969 rc = CIFSSMBUnixQuerySymLink(xid, tcon, full_path, target_path,
971 cifs_remap(cifs_sb));
973 rc = cifs_unix_dfs_readlink(xid, tcon, full_path,
981 oparms.cifs_sb = cifs_sb;
982 oparms.desired_access = FILE_READ_ATTRIBUTES;
983 oparms.create_options = cifs_create_options(cifs_sb,
985 oparms.disposition = FILE_OPEN;
986 oparms.path = full_path;
988 oparms.reconnect = false;
990 rc = CIFS_open(xid, &oparms, &oplock, NULL);
994 rc = CIFSSMBQuerySymLink(xid, tcon, fid.netfid, target_path,
999 convert_delimiter(*target_path, '/');
1001 CIFSSMBClose(xid, tcon, fid.netfid);
1004 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1009 cifs_is_read_op(__u32 oplock)
1011 return oplock == OPLOCK_READ;
1015 cifs_wp_retry_size(struct inode *inode)
1017 return CIFS_SB(inode->i_sb)->ctx->wsize;
1021 cifs_dir_needs_close(struct cifsFileInfo *cfile)
1023 return !cfile->srch_inf.endOfSearch && !cfile->invalidHandle;
1027 cifs_can_echo(struct TCP_Server_Info *server)
1029 if (server->tcpStatus == CifsGood)
1036 cifs_make_node(unsigned int xid, struct inode *inode,
1037 struct dentry *dentry, struct cifs_tcon *tcon,
1038 const char *full_path, umode_t mode, dev_t dev)
1040 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1041 struct inode *newinode = NULL;
1043 FILE_ALL_INFO *buf = NULL;
1044 struct cifs_io_parms io_parms;
1046 struct cifs_fid fid;
1047 struct cifs_open_parms oparms;
1048 unsigned int bytes_written;
1049 struct win_dev *pdev;
1052 if (tcon->unix_ext) {
1054 * SMB1 Unix Extensions: requires server support but
1055 * works with all special files
1057 struct cifs_unix_set_info_args args = {
1058 .mode = mode & ~current_umask(),
1059 .ctime = NO_CHANGE_64,
1060 .atime = NO_CHANGE_64,
1061 .mtime = NO_CHANGE_64,
1064 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1065 args.uid = current_fsuid();
1066 args.gid = current_fsgid();
1068 args.uid = INVALID_UID; /* no change */
1069 args.gid = INVALID_GID; /* no change */
1071 rc = CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args,
1073 cifs_remap(cifs_sb));
1077 rc = cifs_get_inode_info_unix(&newinode, full_path,
1081 d_instantiate(dentry, newinode);
1086 * SMB1 SFU emulation: should work with all servers, but only
1087 * support block and char device (no socket & fifo)
1089 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
1092 if (!S_ISCHR(mode) && !S_ISBLK(mode))
1095 cifs_dbg(FYI, "sfu compat create special file\n");
1097 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
1104 oparms.cifs_sb = cifs_sb;
1105 oparms.desired_access = GENERIC_WRITE;
1106 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
1107 CREATE_OPTION_SPECIAL);
1108 oparms.disposition = FILE_CREATE;
1109 oparms.path = full_path;
1111 oparms.reconnect = false;
1113 if (tcon->ses->server->oplocks)
1114 oplock = REQ_OPLOCK;
1117 rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, buf);
1122 * BB Do not bother to decode buf since no local inode yet to put
1123 * timestamps in, but we can reuse it safely.
1126 pdev = (struct win_dev *)buf;
1127 io_parms.pid = current->tgid;
1128 io_parms.tcon = tcon;
1129 io_parms.offset = 0;
1130 io_parms.length = sizeof(struct win_dev);
1131 iov[1].iov_base = buf;
1132 iov[1].iov_len = sizeof(struct win_dev);
1133 if (S_ISCHR(mode)) {
1134 memcpy(pdev->type, "IntxCHR", 8);
1135 pdev->major = cpu_to_le64(MAJOR(dev));
1136 pdev->minor = cpu_to_le64(MINOR(dev));
1137 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
1138 &bytes_written, iov, 1);
1139 } else if (S_ISBLK(mode)) {
1140 memcpy(pdev->type, "IntxBLK", 8);
1141 pdev->major = cpu_to_le64(MAJOR(dev));
1142 pdev->minor = cpu_to_le64(MINOR(dev));
1143 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
1144 &bytes_written, iov, 1);
1146 tcon->ses->server->ops->close(xid, tcon, &fid);
1149 /* FIXME: add code here to set EAs */
1157 struct smb_version_operations smb1_operations = {
1158 .send_cancel = send_nt_cancel,
1159 .compare_fids = cifs_compare_fids,
1160 .setup_request = cifs_setup_request,
1161 .setup_async_request = cifs_setup_async_request,
1162 .check_receive = cifs_check_receive,
1163 .add_credits = cifs_add_credits,
1164 .set_credits = cifs_set_credits,
1165 .get_credits_field = cifs_get_credits_field,
1166 .get_credits = cifs_get_credits,
1167 .wait_mtu_credits = cifs_wait_mtu_credits,
1168 .get_next_mid = cifs_get_next_mid,
1169 .read_data_offset = cifs_read_data_offset,
1170 .read_data_length = cifs_read_data_length,
1171 .map_error = map_smb_to_linux_error,
1172 .find_mid = cifs_find_mid,
1173 .check_message = checkSMB,
1174 .dump_detail = cifs_dump_detail,
1175 .clear_stats = cifs_clear_stats,
1176 .print_stats = cifs_print_stats,
1177 .is_oplock_break = is_valid_oplock_break,
1178 .downgrade_oplock = cifs_downgrade_oplock,
1179 .check_trans2 = cifs_check_trans2,
1180 .need_neg = cifs_need_neg,
1181 .negotiate = cifs_negotiate,
1182 .negotiate_wsize = cifs_negotiate_wsize,
1183 .negotiate_rsize = cifs_negotiate_rsize,
1184 .sess_setup = CIFS_SessSetup,
1185 .logoff = CIFSSMBLogoff,
1186 .tree_connect = CIFSTCon,
1187 .tree_disconnect = CIFSSMBTDis,
1188 .get_dfs_refer = CIFSGetDFSRefer,
1189 .qfs_tcon = cifs_qfs_tcon,
1190 .is_path_accessible = cifs_is_path_accessible,
1191 .can_echo = cifs_can_echo,
1192 .query_path_info = cifs_query_path_info,
1193 .query_file_info = cifs_query_file_info,
1194 .get_srv_inum = cifs_get_srv_inum,
1195 .set_path_size = CIFSSMBSetEOF,
1196 .set_file_size = CIFSSMBSetFileSize,
1197 .set_file_info = smb_set_file_info,
1198 .set_compression = cifs_set_compression,
1199 .echo = CIFSSMBEcho,
1200 .mkdir = CIFSSMBMkDir,
1201 .mkdir_setinfo = cifs_mkdir_setinfo,
1202 .rmdir = CIFSSMBRmDir,
1203 .unlink = CIFSSMBDelFile,
1204 .rename_pending_delete = cifs_rename_pending_delete,
1205 .rename = CIFSSMBRename,
1206 .create_hardlink = CIFSCreateHardLink,
1207 .query_symlink = cifs_query_symlink,
1208 .open = cifs_open_file,
1209 .set_fid = cifs_set_fid,
1210 .close = cifs_close_file,
1211 .flush = cifs_flush_file,
1212 .async_readv = cifs_async_readv,
1213 .async_writev = cifs_async_writev,
1214 .sync_read = cifs_sync_read,
1215 .sync_write = cifs_sync_write,
1216 .query_dir_first = cifs_query_dir_first,
1217 .query_dir_next = cifs_query_dir_next,
1218 .close_dir = cifs_close_dir,
1219 .calc_smb_size = smbCalcSize,
1220 .oplock_response = cifs_oplock_response,
1221 .queryfs = cifs_queryfs,
1222 .mand_lock = cifs_mand_lock,
1223 .mand_unlock_range = cifs_unlock_range,
1224 .push_mand_locks = cifs_push_mandatory_locks,
1225 .query_mf_symlink = cifs_query_mf_symlink,
1226 .create_mf_symlink = cifs_create_mf_symlink,
1227 .is_read_op = cifs_is_read_op,
1228 .wp_retry_size = cifs_wp_retry_size,
1229 .dir_needs_close = cifs_dir_needs_close,
1230 .select_sectype = cifs_select_sectype,
1231 #ifdef CONFIG_CIFS_XATTR
1232 .query_all_EAs = CIFSSMBQAllEAs,
1233 .set_EA = CIFSSMBSetEA,
1234 #endif /* CIFS_XATTR */
1235 .get_acl = get_cifs_acl,
1236 .get_acl_by_fid = get_cifs_acl_by_fid,
1237 .set_acl = set_cifs_acl,
1238 .make_node = cifs_make_node,
1241 struct smb_version_values smb1_values = {
1242 .version_string = SMB1_VERSION_STRING,
1243 .protocol_id = SMB10_PROT_ID,
1244 .large_lock_type = LOCKING_ANDX_LARGE_FILES,
1245 .exclusive_lock_type = 0,
1246 .shared_lock_type = LOCKING_ANDX_SHARED_LOCK,
1247 .unlock_lock_type = 0,
1248 .header_preamble_size = 4,
1249 .header_size = sizeof(struct smb_hdr),
1250 .max_header_size = MAX_CIFS_HDR_SIZE,
1251 .read_rsp_size = sizeof(READ_RSP),
1252 .lock_cmd = cpu_to_le16(SMB_COM_LOCKING_ANDX),
1253 .cap_unix = CAP_UNIX,
1254 .cap_nt_find = CAP_NT_SMBS | CAP_NT_FIND,
1255 .cap_large_files = CAP_LARGE_FILES,
1256 .signing_enabled = SECMODE_SIGN_ENABLED,
1257 .signing_required = SECMODE_SIGN_REQUIRED,