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20#include <linux/pagemap.h>
21#include <linux/vfs.h>
22#include "cifsglob.h"
23#include "cifsproto.h"
24#include "cifs_debug.h"
25#include "cifspdu.h"
26#include "cifs_unicode.h"
27#include "fs_context.h"
28
29
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37
38
39static int
40send_nt_cancel(struct TCP_Server_Info *server, struct smb_rqst *rqst,
41 struct mid_q_entry *mid)
42{
43 int rc = 0;
44 struct smb_hdr *in_buf = (struct smb_hdr *)rqst->rq_iov[0].iov_base;
45
46
47 in_buf->smb_buf_length = cpu_to_be32(sizeof(struct smb_hdr) - 4 + 2);
48 in_buf->Command = SMB_COM_NT_CANCEL;
49 in_buf->WordCount = 0;
50 put_bcc(0, in_buf);
51
52 mutex_lock(&server->srv_mutex);
53 rc = cifs_sign_smb(in_buf, server, &mid->sequence_number);
54 if (rc) {
55 mutex_unlock(&server->srv_mutex);
56 return rc;
57 }
58
59
60
61
62
63
64 --server->sequence_number;
65 rc = smb_send(server, in_buf, be32_to_cpu(in_buf->smb_buf_length));
66 if (rc < 0)
67 server->sequence_number--;
68
69 mutex_unlock(&server->srv_mutex);
70
71 cifs_dbg(FYI, "issued NT_CANCEL for mid %u, rc = %d\n",
72 get_mid(in_buf), rc);
73
74 return rc;
75}
76
77static bool
78cifs_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
79{
80 return ob1->fid.netfid == ob2->fid.netfid;
81}
82
83static unsigned int
84cifs_read_data_offset(char *buf)
85{
86 READ_RSP *rsp = (READ_RSP *)buf;
87 return le16_to_cpu(rsp->DataOffset);
88}
89
90static unsigned int
91cifs_read_data_length(char *buf, bool in_remaining)
92{
93 READ_RSP *rsp = (READ_RSP *)buf;
94
95 WARN_ON(in_remaining);
96 return (le16_to_cpu(rsp->DataLengthHigh) << 16) +
97 le16_to_cpu(rsp->DataLength);
98}
99
100static struct mid_q_entry *
101cifs_find_mid(struct TCP_Server_Info *server, char *buffer)
102{
103 struct smb_hdr *buf = (struct smb_hdr *)buffer;
104 struct mid_q_entry *mid;
105
106 spin_lock(&GlobalMid_Lock);
107 list_for_each_entry(mid, &server->pending_mid_q, qhead) {
108 if (compare_mid(mid->mid, buf) &&
109 mid->mid_state == MID_REQUEST_SUBMITTED &&
110 le16_to_cpu(mid->command) == buf->Command) {
111 kref_get(&mid->refcount);
112 spin_unlock(&GlobalMid_Lock);
113 return mid;
114 }
115 }
116 spin_unlock(&GlobalMid_Lock);
117 return NULL;
118}
119
120static void
121cifs_add_credits(struct TCP_Server_Info *server,
122 const struct cifs_credits *credits, const int optype)
123{
124 spin_lock(&server->req_lock);
125 server->credits += credits->value;
126 server->in_flight--;
127 spin_unlock(&server->req_lock);
128 wake_up(&server->request_q);
129}
130
131static void
132cifs_set_credits(struct TCP_Server_Info *server, const int val)
133{
134 spin_lock(&server->req_lock);
135 server->credits = val;
136 server->oplocks = val > 1 ? enable_oplocks : false;
137 spin_unlock(&server->req_lock);
138}
139
140static int *
141cifs_get_credits_field(struct TCP_Server_Info *server, const int optype)
142{
143 return &server->credits;
144}
145
146static unsigned int
147cifs_get_credits(struct mid_q_entry *mid)
148{
149 return 1;
150}
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172
173static __u64
174cifs_get_next_mid(struct TCP_Server_Info *server)
175{
176 __u64 mid = 0;
177 __u16 last_mid, cur_mid;
178 bool collision;
179
180 spin_lock(&GlobalMid_Lock);
181
182
183 cur_mid = (__u16)((server->CurrentMid) & 0xffff);
184
185 last_mid = cur_mid;
186 cur_mid++;
187
188 if (cur_mid == 0xffff)
189 cur_mid++;
190
191
192
193
194
195
196
197
198
199
200 while (cur_mid != last_mid) {
201 struct mid_q_entry *mid_entry;
202 unsigned int num_mids;
203
204 collision = false;
205 if (cur_mid == 0)
206 cur_mid++;
207
208 num_mids = 0;
209 list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
210 ++num_mids;
211 if (mid_entry->mid == cur_mid &&
212 mid_entry->mid_state == MID_REQUEST_SUBMITTED) {
213
214 collision = true;
215 break;
216 }
217 }
218
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226
227
228
229 if (num_mids > 32768)
230 server->tcpStatus = CifsNeedReconnect;
231
232 if (!collision) {
233 mid = (__u64)cur_mid;
234 server->CurrentMid = mid;
235 break;
236 }
237 cur_mid++;
238 }
239 spin_unlock(&GlobalMid_Lock);
240 return mid;
241}
242
243
244
245
246
247
248
249static int
250check2ndT2(char *buf)
251{
252 struct smb_hdr *pSMB = (struct smb_hdr *)buf;
253 struct smb_t2_rsp *pSMBt;
254 int remaining;
255 __u16 total_data_size, data_in_this_rsp;
256
257 if (pSMB->Command != SMB_COM_TRANSACTION2)
258 return 0;
259
260
261
262 if (pSMB->WordCount != 10) {
263 cifs_dbg(FYI, "Invalid transact2 word count\n");
264 return -EINVAL;
265 }
266
267 pSMBt = (struct smb_t2_rsp *)pSMB;
268
269 total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount);
270 data_in_this_rsp = get_unaligned_le16(&pSMBt->t2_rsp.DataCount);
271
272 if (total_data_size == data_in_this_rsp)
273 return 0;
274 else if (total_data_size < data_in_this_rsp) {
275 cifs_dbg(FYI, "total data %d smaller than data in frame %d\n",
276 total_data_size, data_in_this_rsp);
277 return -EINVAL;
278 }
279
280 remaining = total_data_size - data_in_this_rsp;
281
282 cifs_dbg(FYI, "missing %d bytes from transact2, check next response\n",
283 remaining);
284 if (total_data_size > CIFSMaxBufSize) {
285 cifs_dbg(VFS, "TotalDataSize %d is over maximum buffer %d\n",
286 total_data_size, CIFSMaxBufSize);
287 return -EINVAL;
288 }
289 return remaining;
290}
291
292static int
293coalesce_t2(char *second_buf, struct smb_hdr *target_hdr)
294{
295 struct smb_t2_rsp *pSMBs = (struct smb_t2_rsp *)second_buf;
296 struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)target_hdr;
297 char *data_area_of_tgt;
298 char *data_area_of_src;
299 int remaining;
300 unsigned int byte_count, total_in_tgt;
301 __u16 tgt_total_cnt, src_total_cnt, total_in_src;
302
303 src_total_cnt = get_unaligned_le16(&pSMBs->t2_rsp.TotalDataCount);
304 tgt_total_cnt = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount);
305
306 if (tgt_total_cnt != src_total_cnt)
307 cifs_dbg(FYI, "total data count of primary and secondary t2 differ source=%hu target=%hu\n",
308 src_total_cnt, tgt_total_cnt);
309
310 total_in_tgt = get_unaligned_le16(&pSMBt->t2_rsp.DataCount);
311
312 remaining = tgt_total_cnt - total_in_tgt;
313
314 if (remaining < 0) {
315 cifs_dbg(FYI, "Server sent too much data. tgt_total_cnt=%hu total_in_tgt=%u\n",
316 tgt_total_cnt, total_in_tgt);
317 return -EPROTO;
318 }
319
320 if (remaining == 0) {
321
322 cifs_dbg(FYI, "no more data remains\n");
323 return 0;
324 }
325
326 total_in_src = get_unaligned_le16(&pSMBs->t2_rsp.DataCount);
327 if (remaining < total_in_src)
328 cifs_dbg(FYI, "transact2 2nd response contains too much data\n");
329
330
331 data_area_of_tgt = (char *)&pSMBt->hdr.Protocol +
332 get_unaligned_le16(&pSMBt->t2_rsp.DataOffset);
333
334
335 data_area_of_src = (char *)&pSMBs->hdr.Protocol +
336 get_unaligned_le16(&pSMBs->t2_rsp.DataOffset);
337
338 data_area_of_tgt += total_in_tgt;
339
340 total_in_tgt += total_in_src;
341
342 if (total_in_tgt > USHRT_MAX) {
343 cifs_dbg(FYI, "coalesced DataCount too large (%u)\n",
344 total_in_tgt);
345 return -EPROTO;
346 }
347 put_unaligned_le16(total_in_tgt, &pSMBt->t2_rsp.DataCount);
348
349
350 byte_count = get_bcc(target_hdr);
351 byte_count += total_in_src;
352
353 if (byte_count > USHRT_MAX) {
354 cifs_dbg(FYI, "coalesced BCC too large (%u)\n", byte_count);
355 return -EPROTO;
356 }
357 put_bcc(byte_count, target_hdr);
358
359 byte_count = be32_to_cpu(target_hdr->smb_buf_length);
360 byte_count += total_in_src;
361
362 if (byte_count > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) {
363 cifs_dbg(FYI, "coalesced BCC exceeds buffer size (%u)\n",
364 byte_count);
365 return -ENOBUFS;
366 }
367 target_hdr->smb_buf_length = cpu_to_be32(byte_count);
368
369
370 memcpy(data_area_of_tgt, data_area_of_src, total_in_src);
371
372 if (remaining != total_in_src) {
373
374 cifs_dbg(FYI, "waiting for more secondary responses\n");
375 return 1;
376 }
377
378
379 cifs_dbg(FYI, "found the last secondary response\n");
380 return 0;
381}
382
383static void
384cifs_downgrade_oplock(struct TCP_Server_Info *server,
385 struct cifsInodeInfo *cinode, __u32 oplock,
386 unsigned int epoch, bool *purge_cache)
387{
388 cifs_set_oplock_level(cinode, oplock);
389}
390
391static bool
392cifs_check_trans2(struct mid_q_entry *mid, struct TCP_Server_Info *server,
393 char *buf, int malformed)
394{
395 if (malformed)
396 return false;
397 if (check2ndT2(buf) <= 0)
398 return false;
399 mid->multiRsp = true;
400 if (mid->resp_buf) {
401
402 malformed = coalesce_t2(buf, mid->resp_buf);
403 if (malformed > 0)
404 return true;
405
406 mid->multiEnd = true;
407 dequeue_mid(mid, malformed);
408 return true;
409 }
410 if (!server->large_buf) {
411
412 cifs_dbg(VFS, "1st trans2 resp needs bigbuf\n");
413 } else {
414
415 mid->resp_buf = buf;
416 mid->large_buf = true;
417 server->bigbuf = NULL;
418 }
419 return true;
420}
421
422static bool
423cifs_need_neg(struct TCP_Server_Info *server)
424{
425 return server->maxBuf == 0;
426}
427
428static int
429cifs_negotiate(const unsigned int xid, struct cifs_ses *ses)
430{
431 int rc;
432 rc = CIFSSMBNegotiate(xid, ses);
433 if (rc == -EAGAIN) {
434
435 set_credits(ses->server, 1);
436 rc = CIFSSMBNegotiate(xid, ses);
437 if (rc == -EAGAIN)
438 rc = -EHOSTDOWN;
439 }
440 return rc;
441}
442
443static unsigned int
444cifs_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
445{
446 __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
447 struct TCP_Server_Info *server = tcon->ses->server;
448 unsigned int wsize;
449
450
451 if (ctx->wsize)
452 wsize = ctx->wsize;
453 else if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_WRITE_CAP))
454 wsize = CIFS_DEFAULT_IOSIZE;
455 else
456 wsize = CIFS_DEFAULT_NON_POSIX_WSIZE;
457
458
459 if (!tcon->unix_ext || !(unix_cap & CIFS_UNIX_LARGE_WRITE_CAP))
460 wsize = min_t(unsigned int, wsize, CIFS_MAX_RFC1002_WSIZE);
461
462
463
464
465
466
467 if (!(server->capabilities & CAP_LARGE_WRITE_X) ||
468 (!(server->capabilities & CAP_UNIX) && server->sign))
469 wsize = min_t(unsigned int, wsize,
470 server->maxBuf - sizeof(WRITE_REQ) + 4);
471
472
473 wsize = min_t(unsigned int, wsize, CIFS_MAX_WSIZE);
474
475 return wsize;
476}
477
478static unsigned int
479cifs_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
480{
481 __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
482 struct TCP_Server_Info *server = tcon->ses->server;
483 unsigned int rsize, defsize;
484
485
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495
496
497 if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_READ_CAP))
498 defsize = CIFS_DEFAULT_IOSIZE;
499 else if (server->capabilities & CAP_LARGE_READ_X)
500 defsize = CIFS_DEFAULT_NON_POSIX_RSIZE;
501 else
502 defsize = server->maxBuf - sizeof(READ_RSP);
503
504 rsize = ctx->rsize ? ctx->rsize : defsize;
505
506
507
508
509
510 if (!(server->capabilities & CAP_LARGE_READ_X))
511 rsize = min_t(unsigned int, CIFSMaxBufSize, rsize);
512
513
514 rsize = min_t(unsigned int, rsize, CIFS_MAX_RSIZE);
515
516 return rsize;
517}
518
519static void
520cifs_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
521 struct cifs_sb_info *cifs_sb)
522{
523 CIFSSMBQFSDeviceInfo(xid, tcon);
524 CIFSSMBQFSAttributeInfo(xid, tcon);
525}
526
527static int
528cifs_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
529 struct cifs_sb_info *cifs_sb, const char *full_path)
530{
531 int rc;
532 FILE_ALL_INFO *file_info;
533
534 file_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
535 if (file_info == NULL)
536 return -ENOMEM;
537
538 rc = CIFSSMBQPathInfo(xid, tcon, full_path, file_info,
539 0 , cifs_sb->local_nls,
540 cifs_remap(cifs_sb));
541
542 if (rc == -EOPNOTSUPP || rc == -EINVAL)
543 rc = SMBQueryInformation(xid, tcon, full_path, file_info,
544 cifs_sb->local_nls, cifs_remap(cifs_sb));
545 kfree(file_info);
546 return rc;
547}
548
549static int
550cifs_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
551 struct cifs_sb_info *cifs_sb, const char *full_path,
552 FILE_ALL_INFO *data, bool *adjustTZ, bool *symlink)
553{
554 int rc;
555
556 *symlink = false;
557
558
559 rc = CIFSSMBQPathInfo(xid, tcon, full_path, data, 0 ,
560 cifs_sb->local_nls, cifs_remap(cifs_sb));
561
562
563
564
565
566 if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
567 rc = SMBQueryInformation(xid, tcon, full_path, data,
568 cifs_sb->local_nls,
569 cifs_remap(cifs_sb));
570 *adjustTZ = true;
571 }
572
573 if (!rc && (le32_to_cpu(data->Attributes) & ATTR_REPARSE)) {
574 int tmprc;
575 int oplock = 0;
576 struct cifs_fid fid;
577 struct cifs_open_parms oparms;
578
579 oparms.tcon = tcon;
580 oparms.cifs_sb = cifs_sb;
581 oparms.desired_access = FILE_READ_ATTRIBUTES;
582 oparms.create_options = cifs_create_options(cifs_sb, 0);
583 oparms.disposition = FILE_OPEN;
584 oparms.path = full_path;
585 oparms.fid = &fid;
586 oparms.reconnect = false;
587
588
589 tmprc = CIFS_open(xid, &oparms, &oplock, NULL);
590 if (tmprc == -EOPNOTSUPP)
591 *symlink = true;
592 else if (tmprc == 0)
593 CIFSSMBClose(xid, tcon, fid.netfid);
594 }
595
596 return rc;
597}
598
599static int
600cifs_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
601 struct cifs_sb_info *cifs_sb, const char *full_path,
602 u64 *uniqueid, FILE_ALL_INFO *data)
603{
604
605
606
607
608
609
610
611
612
613
614
615 return CIFSGetSrvInodeNumber(xid, tcon, full_path, uniqueid,
616 cifs_sb->local_nls,
617 cifs_remap(cifs_sb));
618}
619
620static int
621cifs_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
622 struct cifs_fid *fid, FILE_ALL_INFO *data)
623{
624 return CIFSSMBQFileInfo(xid, tcon, fid->netfid, data);
625}
626
627static void
628cifs_clear_stats(struct cifs_tcon *tcon)
629{
630 atomic_set(&tcon->stats.cifs_stats.num_writes, 0);
631 atomic_set(&tcon->stats.cifs_stats.num_reads, 0);
632 atomic_set(&tcon->stats.cifs_stats.num_flushes, 0);
633 atomic_set(&tcon->stats.cifs_stats.num_oplock_brks, 0);
634 atomic_set(&tcon->stats.cifs_stats.num_opens, 0);
635 atomic_set(&tcon->stats.cifs_stats.num_posixopens, 0);
636 atomic_set(&tcon->stats.cifs_stats.num_posixmkdirs, 0);
637 atomic_set(&tcon->stats.cifs_stats.num_closes, 0);
638 atomic_set(&tcon->stats.cifs_stats.num_deletes, 0);
639 atomic_set(&tcon->stats.cifs_stats.num_mkdirs, 0);
640 atomic_set(&tcon->stats.cifs_stats.num_rmdirs, 0);
641 atomic_set(&tcon->stats.cifs_stats.num_renames, 0);
642 atomic_set(&tcon->stats.cifs_stats.num_t2renames, 0);
643 atomic_set(&tcon->stats.cifs_stats.num_ffirst, 0);
644 atomic_set(&tcon->stats.cifs_stats.num_fnext, 0);
645 atomic_set(&tcon->stats.cifs_stats.num_fclose, 0);
646 atomic_set(&tcon->stats.cifs_stats.num_hardlinks, 0);
647 atomic_set(&tcon->stats.cifs_stats.num_symlinks, 0);
648 atomic_set(&tcon->stats.cifs_stats.num_locks, 0);
649 atomic_set(&tcon->stats.cifs_stats.num_acl_get, 0);
650 atomic_set(&tcon->stats.cifs_stats.num_acl_set, 0);
651}
652
653static void
654cifs_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
655{
656 seq_printf(m, " Oplocks breaks: %d",
657 atomic_read(&tcon->stats.cifs_stats.num_oplock_brks));
658 seq_printf(m, "\nReads: %d Bytes: %llu",
659 atomic_read(&tcon->stats.cifs_stats.num_reads),
660 (long long)(tcon->bytes_read));
661 seq_printf(m, "\nWrites: %d Bytes: %llu",
662 atomic_read(&tcon->stats.cifs_stats.num_writes),
663 (long long)(tcon->bytes_written));
664 seq_printf(m, "\nFlushes: %d",
665 atomic_read(&tcon->stats.cifs_stats.num_flushes));
666 seq_printf(m, "\nLocks: %d HardLinks: %d Symlinks: %d",
667 atomic_read(&tcon->stats.cifs_stats.num_locks),
668 atomic_read(&tcon->stats.cifs_stats.num_hardlinks),
669 atomic_read(&tcon->stats.cifs_stats.num_symlinks));
670 seq_printf(m, "\nOpens: %d Closes: %d Deletes: %d",
671 atomic_read(&tcon->stats.cifs_stats.num_opens),
672 atomic_read(&tcon->stats.cifs_stats.num_closes),
673 atomic_read(&tcon->stats.cifs_stats.num_deletes));
674 seq_printf(m, "\nPosix Opens: %d Posix Mkdirs: %d",
675 atomic_read(&tcon->stats.cifs_stats.num_posixopens),
676 atomic_read(&tcon->stats.cifs_stats.num_posixmkdirs));
677 seq_printf(m, "\nMkdirs: %d Rmdirs: %d",
678 atomic_read(&tcon->stats.cifs_stats.num_mkdirs),
679 atomic_read(&tcon->stats.cifs_stats.num_rmdirs));
680 seq_printf(m, "\nRenames: %d T2 Renames %d",
681 atomic_read(&tcon->stats.cifs_stats.num_renames),
682 atomic_read(&tcon->stats.cifs_stats.num_t2renames));
683 seq_printf(m, "\nFindFirst: %d FNext %d FClose %d",
684 atomic_read(&tcon->stats.cifs_stats.num_ffirst),
685 atomic_read(&tcon->stats.cifs_stats.num_fnext),
686 atomic_read(&tcon->stats.cifs_stats.num_fclose));
687}
688
689static void
690cifs_mkdir_setinfo(struct inode *inode, const char *full_path,
691 struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
692 const unsigned int xid)
693{
694 FILE_BASIC_INFO info;
695 struct cifsInodeInfo *cifsInode;
696 u32 dosattrs;
697 int rc;
698
699 memset(&info, 0, sizeof(info));
700 cifsInode = CIFS_I(inode);
701 dosattrs = cifsInode->cifsAttrs|ATTR_READONLY;
702 info.Attributes = cpu_to_le32(dosattrs);
703 rc = CIFSSMBSetPathInfo(xid, tcon, full_path, &info, cifs_sb->local_nls,
704 cifs_sb);
705 if (rc == 0)
706 cifsInode->cifsAttrs = dosattrs;
707}
708
709static int
710cifs_open_file(const unsigned int xid, struct cifs_open_parms *oparms,
711 __u32 *oplock, FILE_ALL_INFO *buf)
712{
713 if (!(oparms->tcon->ses->capabilities & CAP_NT_SMBS))
714 return SMBLegacyOpen(xid, oparms->tcon, oparms->path,
715 oparms->disposition,
716 oparms->desired_access,
717 oparms->create_options,
718 &oparms->fid->netfid, oplock, buf,
719 oparms->cifs_sb->local_nls,
720 cifs_remap(oparms->cifs_sb));
721 return CIFS_open(xid, oparms, oplock, buf);
722}
723
724static void
725cifs_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
726{
727 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
728 cfile->fid.netfid = fid->netfid;
729 cifs_set_oplock_level(cinode, oplock);
730 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
731}
732
733static void
734cifs_close_file(const unsigned int xid, struct cifs_tcon *tcon,
735 struct cifs_fid *fid)
736{
737 CIFSSMBClose(xid, tcon, fid->netfid);
738}
739
740static int
741cifs_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
742 struct cifs_fid *fid)
743{
744 return CIFSSMBFlush(xid, tcon, fid->netfid);
745}
746
747static int
748cifs_sync_read(const unsigned int xid, struct cifs_fid *pfid,
749 struct cifs_io_parms *parms, unsigned int *bytes_read,
750 char **buf, int *buf_type)
751{
752 parms->netfid = pfid->netfid;
753 return CIFSSMBRead(xid, parms, bytes_read, buf, buf_type);
754}
755
756static int
757cifs_sync_write(const unsigned int xid, struct cifs_fid *pfid,
758 struct cifs_io_parms *parms, unsigned int *written,
759 struct kvec *iov, unsigned long nr_segs)
760{
761
762 parms->netfid = pfid->netfid;
763 return CIFSSMBWrite2(xid, parms, written, iov, nr_segs);
764}
765
766static int
767smb_set_file_info(struct inode *inode, const char *full_path,
768 FILE_BASIC_INFO *buf, const unsigned int xid)
769{
770 int oplock = 0;
771 int rc;
772 __u32 netpid;
773 struct cifs_fid fid;
774 struct cifs_open_parms oparms;
775 struct cifsFileInfo *open_file;
776 struct cifsInodeInfo *cinode = CIFS_I(inode);
777 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
778 struct tcon_link *tlink = NULL;
779 struct cifs_tcon *tcon;
780
781
782 open_file = find_writable_file(cinode, FIND_WR_FSUID_ONLY);
783 if (open_file) {
784 fid.netfid = open_file->fid.netfid;
785 netpid = open_file->pid;
786 tcon = tlink_tcon(open_file->tlink);
787 goto set_via_filehandle;
788 }
789
790 tlink = cifs_sb_tlink(cifs_sb);
791 if (IS_ERR(tlink)) {
792 rc = PTR_ERR(tlink);
793 tlink = NULL;
794 goto out;
795 }
796 tcon = tlink_tcon(tlink);
797
798 rc = CIFSSMBSetPathInfo(xid, tcon, full_path, buf, cifs_sb->local_nls,
799 cifs_sb);
800 if (rc == 0) {
801 cinode->cifsAttrs = le32_to_cpu(buf->Attributes);
802 goto out;
803 } else if (rc != -EOPNOTSUPP && rc != -EINVAL) {
804 goto out;
805 }
806
807 oparms.tcon = tcon;
808 oparms.cifs_sb = cifs_sb;
809 oparms.desired_access = SYNCHRONIZE | FILE_WRITE_ATTRIBUTES;
810 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR);
811 oparms.disposition = FILE_OPEN;
812 oparms.path = full_path;
813 oparms.fid = &fid;
814 oparms.reconnect = false;
815
816 cifs_dbg(FYI, "calling SetFileInfo since SetPathInfo for times not supported by this server\n");
817 rc = CIFS_open(xid, &oparms, &oplock, NULL);
818 if (rc != 0) {
819 if (rc == -EIO)
820 rc = -EINVAL;
821 goto out;
822 }
823
824 netpid = current->tgid;
825
826set_via_filehandle:
827 rc = CIFSSMBSetFileInfo(xid, tcon, buf, fid.netfid, netpid);
828 if (!rc)
829 cinode->cifsAttrs = le32_to_cpu(buf->Attributes);
830
831 if (open_file == NULL)
832 CIFSSMBClose(xid, tcon, fid.netfid);
833 else
834 cifsFileInfo_put(open_file);
835out:
836 if (tlink != NULL)
837 cifs_put_tlink(tlink);
838 return rc;
839}
840
841static int
842cifs_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
843 struct cifsFileInfo *cfile)
844{
845 return CIFSSMB_set_compression(xid, tcon, cfile->fid.netfid);
846}
847
848static int
849cifs_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
850 const char *path, struct cifs_sb_info *cifs_sb,
851 struct cifs_fid *fid, __u16 search_flags,
852 struct cifs_search_info *srch_inf)
853{
854 int rc;
855
856 rc = CIFSFindFirst(xid, tcon, path, cifs_sb,
857 &fid->netfid, search_flags, srch_inf, true);
858 if (rc)
859 cifs_dbg(FYI, "find first failed=%d\n", rc);
860 return rc;
861}
862
863static int
864cifs_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
865 struct cifs_fid *fid, __u16 search_flags,
866 struct cifs_search_info *srch_inf)
867{
868 return CIFSFindNext(xid, tcon, fid->netfid, search_flags, srch_inf);
869}
870
871static int
872cifs_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
873 struct cifs_fid *fid)
874{
875 return CIFSFindClose(xid, tcon, fid->netfid);
876}
877
878static int
879cifs_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
880 struct cifsInodeInfo *cinode)
881{
882 return CIFSSMBLock(0, tcon, fid->netfid, current->tgid, 0, 0, 0, 0,
883 LOCKING_ANDX_OPLOCK_RELEASE, false,
884 CIFS_CACHE_READ(cinode) ? 1 : 0);
885}
886
887static int
888cifs_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
889 struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
890{
891 int rc = -EOPNOTSUPP;
892
893 buf->f_type = CIFS_MAGIC_NUMBER;
894
895
896
897
898 if ((tcon->ses->capabilities & CAP_UNIX) &&
899 (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
900 rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
901
902
903
904
905
906 if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
907 rc = CIFSSMBQFSInfo(xid, tcon, buf);
908
909
910
911
912
913
914 if (rc)
915 rc = SMBOldQFSInfo(xid, tcon, buf);
916 return rc;
917}
918
919static int
920cifs_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
921 __u64 length, __u32 type, int lock, int unlock, bool wait)
922{
923 return CIFSSMBLock(xid, tlink_tcon(cfile->tlink), cfile->fid.netfid,
924 current->tgid, length, offset, unlock, lock,
925 (__u8)type, wait, 0);
926}
927
928static int
929cifs_unix_dfs_readlink(const unsigned int xid, struct cifs_tcon *tcon,
930 const unsigned char *searchName, char **symlinkinfo,
931 const struct nls_table *nls_codepage)
932{
933#ifdef CONFIG_CIFS_DFS_UPCALL
934 int rc;
935 struct dfs_info3_param referral = {0};
936
937 rc = get_dfs_path(xid, tcon->ses, searchName, nls_codepage, &referral,
938 0);
939
940 if (!rc) {
941 *symlinkinfo = kstrdup(referral.node_name, GFP_KERNEL);
942 free_dfs_info_param(&referral);
943 if (!*symlinkinfo)
944 rc = -ENOMEM;
945 }
946 return rc;
947#else
948 return -EREMOTE;
949#endif
950}
951
952static int
953cifs_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
954 struct cifs_sb_info *cifs_sb, const char *full_path,
955 char **target_path, bool is_reparse_point)
956{
957 int rc;
958 int oplock = 0;
959 struct cifs_fid fid;
960 struct cifs_open_parms oparms;
961
962 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
963
964 if (is_reparse_point) {
965 cifs_dbg(VFS, "reparse points not handled for SMB1 symlinks\n");
966 return -EOPNOTSUPP;
967 }
968
969
970 if (cap_unix(tcon->ses)) {
971 rc = CIFSSMBUnixQuerySymLink(xid, tcon, full_path, target_path,
972 cifs_sb->local_nls,
973 cifs_remap(cifs_sb));
974 if (rc == -EREMOTE)
975 rc = cifs_unix_dfs_readlink(xid, tcon, full_path,
976 target_path,
977 cifs_sb->local_nls);
978
979 goto out;
980 }
981
982 oparms.tcon = tcon;
983 oparms.cifs_sb = cifs_sb;
984 oparms.desired_access = FILE_READ_ATTRIBUTES;
985 oparms.create_options = cifs_create_options(cifs_sb,
986 OPEN_REPARSE_POINT);
987 oparms.disposition = FILE_OPEN;
988 oparms.path = full_path;
989 oparms.fid = &fid;
990 oparms.reconnect = false;
991
992 rc = CIFS_open(xid, &oparms, &oplock, NULL);
993 if (rc)
994 goto out;
995
996 rc = CIFSSMBQuerySymLink(xid, tcon, fid.netfid, target_path,
997 cifs_sb->local_nls);
998 if (rc)
999 goto out_close;
1000
1001 convert_delimiter(*target_path, '/');
1002out_close:
1003 CIFSSMBClose(xid, tcon, fid.netfid);
1004out:
1005 if (!rc)
1006 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1007 return rc;
1008}
1009
1010static bool
1011cifs_is_read_op(__u32 oplock)
1012{
1013 return oplock == OPLOCK_READ;
1014}
1015
1016static unsigned int
1017cifs_wp_retry_size(struct inode *inode)
1018{
1019 return CIFS_SB(inode->i_sb)->ctx->wsize;
1020}
1021
1022static bool
1023cifs_dir_needs_close(struct cifsFileInfo *cfile)
1024{
1025 return !cfile->srch_inf.endOfSearch && !cfile->invalidHandle;
1026}
1027
1028static bool
1029cifs_can_echo(struct TCP_Server_Info *server)
1030{
1031 if (server->tcpStatus == CifsGood)
1032 return true;
1033
1034 return false;
1035}
1036
1037static int
1038cifs_make_node(unsigned int xid, struct inode *inode,
1039 struct dentry *dentry, struct cifs_tcon *tcon,
1040 const char *full_path, umode_t mode, dev_t dev)
1041{
1042 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1043 struct inode *newinode = NULL;
1044 int rc = -EPERM;
1045 FILE_ALL_INFO *buf = NULL;
1046 struct cifs_io_parms io_parms;
1047 __u32 oplock = 0;
1048 struct cifs_fid fid;
1049 struct cifs_open_parms oparms;
1050 unsigned int bytes_written;
1051 struct win_dev *pdev;
1052 struct kvec iov[2];
1053
1054 if (tcon->unix_ext) {
1055
1056
1057
1058
1059 struct cifs_unix_set_info_args args = {
1060 .mode = mode & ~current_umask(),
1061 .ctime = NO_CHANGE_64,
1062 .atime = NO_CHANGE_64,
1063 .mtime = NO_CHANGE_64,
1064 .device = dev,
1065 };
1066 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1067 args.uid = current_fsuid();
1068 args.gid = current_fsgid();
1069 } else {
1070 args.uid = INVALID_UID;
1071 args.gid = INVALID_GID;
1072 }
1073 rc = CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args,
1074 cifs_sb->local_nls,
1075 cifs_remap(cifs_sb));
1076 if (rc)
1077 goto out;
1078
1079 rc = cifs_get_inode_info_unix(&newinode, full_path,
1080 inode->i_sb, xid);
1081
1082 if (rc == 0)
1083 d_instantiate(dentry, newinode);
1084 goto out;
1085 }
1086
1087
1088
1089
1090
1091 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
1092 goto out;
1093
1094 if (!S_ISCHR(mode) && !S_ISBLK(mode))
1095 goto out;
1096
1097 cifs_dbg(FYI, "sfu compat create special file\n");
1098
1099 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
1100 if (buf == NULL) {
1101 rc = -ENOMEM;
1102 goto out;
1103 }
1104
1105 oparms.tcon = tcon;
1106 oparms.cifs_sb = cifs_sb;
1107 oparms.desired_access = GENERIC_WRITE;
1108 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
1109 CREATE_OPTION_SPECIAL);
1110 oparms.disposition = FILE_CREATE;
1111 oparms.path = full_path;
1112 oparms.fid = &fid;
1113 oparms.reconnect = false;
1114
1115 if (tcon->ses->server->oplocks)
1116 oplock = REQ_OPLOCK;
1117 else
1118 oplock = 0;
1119 rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, buf);
1120 if (rc)
1121 goto out;
1122
1123
1124
1125
1126
1127
1128 pdev = (struct win_dev *)buf;
1129 io_parms.pid = current->tgid;
1130 io_parms.tcon = tcon;
1131 io_parms.offset = 0;
1132 io_parms.length = sizeof(struct win_dev);
1133 iov[1].iov_base = buf;
1134 iov[1].iov_len = sizeof(struct win_dev);
1135 if (S_ISCHR(mode)) {
1136 memcpy(pdev->type, "IntxCHR", 8);
1137 pdev->major = cpu_to_le64(MAJOR(dev));
1138 pdev->minor = cpu_to_le64(MINOR(dev));
1139 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
1140 &bytes_written, iov, 1);
1141 } else if (S_ISBLK(mode)) {
1142 memcpy(pdev->type, "IntxBLK", 8);
1143 pdev->major = cpu_to_le64(MAJOR(dev));
1144 pdev->minor = cpu_to_le64(MINOR(dev));
1145 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
1146 &bytes_written, iov, 1);
1147 }
1148 tcon->ses->server->ops->close(xid, tcon, &fid);
1149 d_drop(dentry);
1150
1151
1152out:
1153 kfree(buf);
1154 return rc;
1155}
1156
1157
1158
1159struct smb_version_operations smb1_operations = {
1160 .send_cancel = send_nt_cancel,
1161 .compare_fids = cifs_compare_fids,
1162 .setup_request = cifs_setup_request,
1163 .setup_async_request = cifs_setup_async_request,
1164 .check_receive = cifs_check_receive,
1165 .add_credits = cifs_add_credits,
1166 .set_credits = cifs_set_credits,
1167 .get_credits_field = cifs_get_credits_field,
1168 .get_credits = cifs_get_credits,
1169 .wait_mtu_credits = cifs_wait_mtu_credits,
1170 .get_next_mid = cifs_get_next_mid,
1171 .read_data_offset = cifs_read_data_offset,
1172 .read_data_length = cifs_read_data_length,
1173 .map_error = map_smb_to_linux_error,
1174 .find_mid = cifs_find_mid,
1175 .check_message = checkSMB,
1176 .dump_detail = cifs_dump_detail,
1177 .clear_stats = cifs_clear_stats,
1178 .print_stats = cifs_print_stats,
1179 .is_oplock_break = is_valid_oplock_break,
1180 .downgrade_oplock = cifs_downgrade_oplock,
1181 .check_trans2 = cifs_check_trans2,
1182 .need_neg = cifs_need_neg,
1183 .negotiate = cifs_negotiate,
1184 .negotiate_wsize = cifs_negotiate_wsize,
1185 .negotiate_rsize = cifs_negotiate_rsize,
1186 .sess_setup = CIFS_SessSetup,
1187 .logoff = CIFSSMBLogoff,
1188 .tree_connect = CIFSTCon,
1189 .tree_disconnect = CIFSSMBTDis,
1190 .get_dfs_refer = CIFSGetDFSRefer,
1191 .qfs_tcon = cifs_qfs_tcon,
1192 .is_path_accessible = cifs_is_path_accessible,
1193 .can_echo = cifs_can_echo,
1194 .query_path_info = cifs_query_path_info,
1195 .query_file_info = cifs_query_file_info,
1196 .get_srv_inum = cifs_get_srv_inum,
1197 .set_path_size = CIFSSMBSetEOF,
1198 .set_file_size = CIFSSMBSetFileSize,
1199 .set_file_info = smb_set_file_info,
1200 .set_compression = cifs_set_compression,
1201 .echo = CIFSSMBEcho,
1202 .mkdir = CIFSSMBMkDir,
1203 .mkdir_setinfo = cifs_mkdir_setinfo,
1204 .rmdir = CIFSSMBRmDir,
1205 .unlink = CIFSSMBDelFile,
1206 .rename_pending_delete = cifs_rename_pending_delete,
1207 .rename = CIFSSMBRename,
1208 .create_hardlink = CIFSCreateHardLink,
1209 .query_symlink = cifs_query_symlink,
1210 .open = cifs_open_file,
1211 .set_fid = cifs_set_fid,
1212 .close = cifs_close_file,
1213 .flush = cifs_flush_file,
1214 .async_readv = cifs_async_readv,
1215 .async_writev = cifs_async_writev,
1216 .sync_read = cifs_sync_read,
1217 .sync_write = cifs_sync_write,
1218 .query_dir_first = cifs_query_dir_first,
1219 .query_dir_next = cifs_query_dir_next,
1220 .close_dir = cifs_close_dir,
1221 .calc_smb_size = smbCalcSize,
1222 .oplock_response = cifs_oplock_response,
1223 .queryfs = cifs_queryfs,
1224 .mand_lock = cifs_mand_lock,
1225 .mand_unlock_range = cifs_unlock_range,
1226 .push_mand_locks = cifs_push_mandatory_locks,
1227 .query_mf_symlink = cifs_query_mf_symlink,
1228 .create_mf_symlink = cifs_create_mf_symlink,
1229 .is_read_op = cifs_is_read_op,
1230 .wp_retry_size = cifs_wp_retry_size,
1231 .dir_needs_close = cifs_dir_needs_close,
1232 .select_sectype = cifs_select_sectype,
1233#ifdef CONFIG_CIFS_XATTR
1234 .query_all_EAs = CIFSSMBQAllEAs,
1235 .set_EA = CIFSSMBSetEA,
1236#endif
1237 .get_acl = get_cifs_acl,
1238 .get_acl_by_fid = get_cifs_acl_by_fid,
1239 .set_acl = set_cifs_acl,
1240 .make_node = cifs_make_node,
1241};
1242
1243struct smb_version_values smb1_values = {
1244 .version_string = SMB1_VERSION_STRING,
1245 .protocol_id = SMB10_PROT_ID,
1246 .large_lock_type = LOCKING_ANDX_LARGE_FILES,
1247 .exclusive_lock_type = 0,
1248 .shared_lock_type = LOCKING_ANDX_SHARED_LOCK,
1249 .unlock_lock_type = 0,
1250 .header_preamble_size = 4,
1251 .header_size = sizeof(struct smb_hdr),
1252 .max_header_size = MAX_CIFS_HDR_SIZE,
1253 .read_rsp_size = sizeof(READ_RSP),
1254 .lock_cmd = cpu_to_le16(SMB_COM_LOCKING_ANDX),
1255 .cap_unix = CAP_UNIX,
1256 .cap_nt_find = CAP_NT_SMBS | CAP_NT_FIND,
1257 .cap_large_files = CAP_LARGE_FILES,
1258 .signing_enabled = SECMODE_SIGN_ENABLED,
1259 .signing_required = SECMODE_SIGN_REQUIRED,
1260};
1261