1 // SPDX-License-Identifier: LGPL-2.1
2 /*
3 *
4 * Copyright (C) International Business Machines Corp., 2002, 2011
5 * Etersoft, 2012
6 * Author(s): Pavel Shilovsky (pshilovsky@samba.org),
7 * Steve French (sfrench@us.ibm.com)
8 *
9 */
10 #include <linux/fs.h>
11 #include <linux/stat.h>
12 #include <linux/slab.h>
13 #include <linux/pagemap.h>
14 #include <asm/div64.h>
15 #include "cifsfs.h"
16 #include "cifspdu.h"
17 #include "cifsglob.h"
18 #include "cifsproto.h"
19 #include "cifs_debug.h"
20 #include "cifs_fs_sb.h"
21 #include "cifs_unicode.h"
22 #include "fscache.h"
23 #include "smb2glob.h"
24 #include "smb2pdu.h"
25 #include "smb2proto.h"
26 #include "cached_dir.h"
27 #include "smb2status.h"
28
reparse_buf_ptr(struct kvec * iov)29 static struct reparse_data_buffer *reparse_buf_ptr(struct kvec *iov)
30 {
31 struct reparse_data_buffer *buf;
32 struct smb2_ioctl_rsp *io = iov->iov_base;
33 u32 off, count, len;
34
35 count = le32_to_cpu(io->OutputCount);
36 off = le32_to_cpu(io->OutputOffset);
37 if (check_add_overflow(off, count, &len) || len > iov->iov_len)
38 return ERR_PTR(-EIO);
39
40 buf = (struct reparse_data_buffer *)((u8 *)io + off);
41 len = sizeof(*buf);
42 if (count < len || count < le16_to_cpu(buf->ReparseDataLength) + len)
43 return ERR_PTR(-EIO);
44 return buf;
45 }
46
file_create_options(struct dentry * dentry)47 static inline __u32 file_create_options(struct dentry *dentry)
48 {
49 struct cifsInodeInfo *ci;
50
51 if (dentry) {
52 ci = CIFS_I(d_inode(dentry));
53 if (ci->cifsAttrs & ATTR_REPARSE)
54 return OPEN_REPARSE_POINT;
55 }
56 return 0;
57 }
58
59 /* Parse owner and group from SMB3.1.1 POSIX query info */
parse_posix_sids(struct cifs_open_info_data * data,struct kvec * rsp_iov)60 static int parse_posix_sids(struct cifs_open_info_data *data,
61 struct kvec *rsp_iov)
62 {
63 struct smb2_query_info_rsp *qi = rsp_iov->iov_base;
64 unsigned int out_len = le32_to_cpu(qi->OutputBufferLength);
65 unsigned int qi_len = sizeof(data->posix_fi);
66 int owner_len, group_len;
67 u8 *sidsbuf, *sidsbuf_end;
68
69 if (out_len <= qi_len)
70 return -EINVAL;
71
72 sidsbuf = (u8 *)qi + le16_to_cpu(qi->OutputBufferOffset) + qi_len;
73 sidsbuf_end = sidsbuf + out_len - qi_len;
74
75 owner_len = posix_info_sid_size(sidsbuf, sidsbuf_end);
76 if (owner_len == -1)
77 return -EINVAL;
78
79 memcpy(&data->posix_owner, sidsbuf, owner_len);
80 group_len = posix_info_sid_size(sidsbuf + owner_len, sidsbuf_end);
81 if (group_len == -1)
82 return -EINVAL;
83
84 memcpy(&data->posix_group, sidsbuf + owner_len, group_len);
85 return 0;
86 }
87
88 /*
89 * note: If cfile is passed, the reference to it is dropped here.
90 * So make sure that you do not reuse cfile after return from this func.
91 *
92 * If passing @out_iov and @out_buftype, ensure to make them both large enough
93 * (>= 3) to hold all compounded responses. Caller is also responsible for
94 * freeing them up with free_rsp_buf().
95 */
smb2_compound_op(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,const char * full_path,__u32 desired_access,__u32 create_disposition,__u32 create_options,umode_t mode,struct kvec * in_iov,int * cmds,int num_cmds,struct cifsFileInfo * cfile,struct kvec * out_iov,int * out_buftype)96 static int smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
97 struct cifs_sb_info *cifs_sb, const char *full_path,
98 __u32 desired_access, __u32 create_disposition,
99 __u32 create_options, umode_t mode, struct kvec *in_iov,
100 int *cmds, int num_cmds, struct cifsFileInfo *cfile,
101 struct kvec *out_iov, int *out_buftype)
102 {
103
104 struct reparse_data_buffer *rbuf;
105 struct smb2_compound_vars *vars = NULL;
106 struct kvec *rsp_iov, *iov;
107 struct smb_rqst *rqst;
108 int rc;
109 __le16 *utf16_path = NULL;
110 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
111 struct cifs_fid fid;
112 struct cifs_ses *ses = tcon->ses;
113 struct TCP_Server_Info *server;
114 int num_rqst = 0, i;
115 int resp_buftype[MAX_COMPOUND];
116 struct smb2_query_info_rsp *qi_rsp = NULL;
117 struct cifs_open_info_data *idata;
118 int flags = 0;
119 __u8 delete_pending[8] = {1, 0, 0, 0, 0, 0, 0, 0};
120 unsigned int size[2];
121 void *data[2];
122 int len;
123 int retries = 0, cur_sleep = 1;
124
125 replay_again:
126 /* reinitialize for possible replay */
127 flags = 0;
128 oplock = SMB2_OPLOCK_LEVEL_NONE;
129 num_rqst = 0;
130 server = cifs_pick_channel(ses);
131
132 vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
133 if (vars == NULL)
134 return -ENOMEM;
135 rqst = &vars->rqst[0];
136 rsp_iov = &vars->rsp_iov[0];
137
138 if (smb3_encryption_required(tcon))
139 flags |= CIFS_TRANSFORM_REQ;
140
141 for (i = 0; i < ARRAY_SIZE(resp_buftype); i++)
142 resp_buftype[i] = CIFS_NO_BUFFER;
143
144 /* We already have a handle so we can skip the open */
145 if (cfile)
146 goto after_open;
147
148 /* Open */
149 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
150 if (!utf16_path) {
151 rc = -ENOMEM;
152 goto finished;
153 }
154
155 vars->oparms = (struct cifs_open_parms) {
156 .tcon = tcon,
157 .path = full_path,
158 .desired_access = desired_access,
159 .disposition = create_disposition,
160 .create_options = cifs_create_options(cifs_sb, create_options),
161 .fid = &fid,
162 .mode = mode,
163 .cifs_sb = cifs_sb,
164 };
165
166 rqst[num_rqst].rq_iov = &vars->open_iov[0];
167 rqst[num_rqst].rq_nvec = SMB2_CREATE_IOV_SIZE;
168 rc = SMB2_open_init(tcon, server,
169 &rqst[num_rqst], &oplock, &vars->oparms,
170 utf16_path);
171 kfree(utf16_path);
172 if (rc)
173 goto finished;
174
175 smb2_set_next_command(tcon, &rqst[num_rqst]);
176 after_open:
177 num_rqst++;
178 rc = 0;
179
180 for (i = 0; i < num_cmds; i++) {
181 /* Operation */
182 switch (cmds[i]) {
183 case SMB2_OP_QUERY_INFO:
184 rqst[num_rqst].rq_iov = &vars->qi_iov;
185 rqst[num_rqst].rq_nvec = 1;
186
187 if (cfile) {
188 rc = SMB2_query_info_init(tcon, server,
189 &rqst[num_rqst],
190 cfile->fid.persistent_fid,
191 cfile->fid.volatile_fid,
192 FILE_ALL_INFORMATION,
193 SMB2_O_INFO_FILE, 0,
194 sizeof(struct smb2_file_all_info) +
195 PATH_MAX * 2, 0, NULL);
196 } else {
197 rc = SMB2_query_info_init(tcon, server,
198 &rqst[num_rqst],
199 COMPOUND_FID,
200 COMPOUND_FID,
201 FILE_ALL_INFORMATION,
202 SMB2_O_INFO_FILE, 0,
203 sizeof(struct smb2_file_all_info) +
204 PATH_MAX * 2, 0, NULL);
205 if (!rc) {
206 smb2_set_next_command(tcon, &rqst[num_rqst]);
207 smb2_set_related(&rqst[num_rqst]);
208 }
209 }
210
211 if (rc)
212 goto finished;
213 num_rqst++;
214 trace_smb3_query_info_compound_enter(xid, ses->Suid,
215 tcon->tid, full_path);
216 break;
217 case SMB2_OP_POSIX_QUERY_INFO:
218 rqst[num_rqst].rq_iov = &vars->qi_iov;
219 rqst[num_rqst].rq_nvec = 1;
220
221 if (cfile) {
222 /* TBD: fix following to allow for longer SIDs */
223 rc = SMB2_query_info_init(tcon, server,
224 &rqst[num_rqst],
225 cfile->fid.persistent_fid,
226 cfile->fid.volatile_fid,
227 SMB_FIND_FILE_POSIX_INFO,
228 SMB2_O_INFO_FILE, 0,
229 sizeof(struct smb311_posix_qinfo *) +
230 (PATH_MAX * 2) +
231 (sizeof(struct cifs_sid) * 2), 0, NULL);
232 } else {
233 rc = SMB2_query_info_init(tcon, server,
234 &rqst[num_rqst],
235 COMPOUND_FID,
236 COMPOUND_FID,
237 SMB_FIND_FILE_POSIX_INFO,
238 SMB2_O_INFO_FILE, 0,
239 sizeof(struct smb311_posix_qinfo *) +
240 (PATH_MAX * 2) +
241 (sizeof(struct cifs_sid) * 2), 0, NULL);
242 if (!rc) {
243 smb2_set_next_command(tcon, &rqst[num_rqst]);
244 smb2_set_related(&rqst[num_rqst]);
245 }
246 }
247
248 if (rc)
249 goto finished;
250 num_rqst++;
251 trace_smb3_posix_query_info_compound_enter(xid, ses->Suid,
252 tcon->tid, full_path);
253 break;
254 case SMB2_OP_DELETE:
255 trace_smb3_delete_enter(xid, ses->Suid, tcon->tid, full_path);
256 break;
257 case SMB2_OP_MKDIR:
258 /*
259 * Directories are created through parameters in the
260 * SMB2_open() call.
261 */
262 trace_smb3_mkdir_enter(xid, ses->Suid, tcon->tid, full_path);
263 break;
264 case SMB2_OP_RMDIR:
265 rqst[num_rqst].rq_iov = &vars->si_iov[0];
266 rqst[num_rqst].rq_nvec = 1;
267
268 size[0] = 1; /* sizeof __u8 See MS-FSCC section 2.4.11 */
269 data[0] = &delete_pending[0];
270
271 rc = SMB2_set_info_init(tcon, server,
272 &rqst[num_rqst], COMPOUND_FID,
273 COMPOUND_FID, current->tgid,
274 FILE_DISPOSITION_INFORMATION,
275 SMB2_O_INFO_FILE, 0, data, size);
276 if (rc)
277 goto finished;
278 smb2_set_next_command(tcon, &rqst[num_rqst]);
279 smb2_set_related(&rqst[num_rqst++]);
280 trace_smb3_rmdir_enter(xid, ses->Suid, tcon->tid, full_path);
281 break;
282 case SMB2_OP_SET_EOF:
283 rqst[num_rqst].rq_iov = &vars->si_iov[0];
284 rqst[num_rqst].rq_nvec = 1;
285
286 size[0] = in_iov[i].iov_len;
287 data[0] = in_iov[i].iov_base;
288
289 if (cfile) {
290 rc = SMB2_set_info_init(tcon, server,
291 &rqst[num_rqst],
292 cfile->fid.persistent_fid,
293 cfile->fid.volatile_fid,
294 current->tgid,
295 FILE_END_OF_FILE_INFORMATION,
296 SMB2_O_INFO_FILE, 0,
297 data, size);
298 } else {
299 rc = SMB2_set_info_init(tcon, server,
300 &rqst[num_rqst],
301 COMPOUND_FID,
302 COMPOUND_FID,
303 current->tgid,
304 FILE_END_OF_FILE_INFORMATION,
305 SMB2_O_INFO_FILE, 0,
306 data, size);
307 if (!rc) {
308 smb2_set_next_command(tcon, &rqst[num_rqst]);
309 smb2_set_related(&rqst[num_rqst]);
310 }
311 }
312 if (rc)
313 goto finished;
314 num_rqst++;
315 trace_smb3_set_eof_enter(xid, ses->Suid, tcon->tid, full_path);
316 break;
317 case SMB2_OP_SET_INFO:
318 rqst[num_rqst].rq_iov = &vars->si_iov[0];
319 rqst[num_rqst].rq_nvec = 1;
320
321 size[0] = in_iov[i].iov_len;
322 data[0] = in_iov[i].iov_base;
323
324 if (cfile) {
325 rc = SMB2_set_info_init(tcon, server,
326 &rqst[num_rqst],
327 cfile->fid.persistent_fid,
328 cfile->fid.volatile_fid, current->tgid,
329 FILE_BASIC_INFORMATION,
330 SMB2_O_INFO_FILE, 0, data, size);
331 } else {
332 rc = SMB2_set_info_init(tcon, server,
333 &rqst[num_rqst],
334 COMPOUND_FID,
335 COMPOUND_FID, current->tgid,
336 FILE_BASIC_INFORMATION,
337 SMB2_O_INFO_FILE, 0, data, size);
338 if (!rc) {
339 smb2_set_next_command(tcon, &rqst[num_rqst]);
340 smb2_set_related(&rqst[num_rqst]);
341 }
342 }
343
344 if (rc)
345 goto finished;
346 num_rqst++;
347 trace_smb3_set_info_compound_enter(xid, ses->Suid,
348 tcon->tid, full_path);
349 break;
350 case SMB2_OP_RENAME:
351 rqst[num_rqst].rq_iov = &vars->si_iov[0];
352 rqst[num_rqst].rq_nvec = 2;
353
354 len = in_iov[i].iov_len;
355
356 vars->rename_info.ReplaceIfExists = 1;
357 vars->rename_info.RootDirectory = 0;
358 vars->rename_info.FileNameLength = cpu_to_le32(len);
359
360 size[0] = sizeof(struct smb2_file_rename_info);
361 data[0] = &vars->rename_info;
362
363 size[1] = len + 2 /* null */;
364 data[1] = in_iov[i].iov_base;
365
366 if (cfile) {
367 rc = SMB2_set_info_init(tcon, server,
368 &rqst[num_rqst],
369 cfile->fid.persistent_fid,
370 cfile->fid.volatile_fid,
371 current->tgid, FILE_RENAME_INFORMATION,
372 SMB2_O_INFO_FILE, 0, data, size);
373 } else {
374 rc = SMB2_set_info_init(tcon, server,
375 &rqst[num_rqst],
376 COMPOUND_FID, COMPOUND_FID,
377 current->tgid, FILE_RENAME_INFORMATION,
378 SMB2_O_INFO_FILE, 0, data, size);
379 if (!rc) {
380 smb2_set_next_command(tcon, &rqst[num_rqst]);
381 smb2_set_related(&rqst[num_rqst]);
382 }
383 }
384 if (rc)
385 goto finished;
386 num_rqst++;
387 trace_smb3_rename_enter(xid, ses->Suid, tcon->tid, full_path);
388 break;
389 case SMB2_OP_HARDLINK:
390 rqst[num_rqst].rq_iov = &vars->si_iov[0];
391 rqst[num_rqst].rq_nvec = 2;
392
393 len = in_iov[i].iov_len;
394
395 vars->link_info.ReplaceIfExists = 0;
396 vars->link_info.RootDirectory = 0;
397 vars->link_info.FileNameLength = cpu_to_le32(len);
398
399 size[0] = sizeof(struct smb2_file_link_info);
400 data[0] = &vars->link_info;
401
402 size[1] = len + 2 /* null */;
403 data[1] = in_iov[i].iov_base;
404
405 rc = SMB2_set_info_init(tcon, server,
406 &rqst[num_rqst], COMPOUND_FID,
407 COMPOUND_FID, current->tgid,
408 FILE_LINK_INFORMATION,
409 SMB2_O_INFO_FILE, 0, data, size);
410 if (rc)
411 goto finished;
412 smb2_set_next_command(tcon, &rqst[num_rqst]);
413 smb2_set_related(&rqst[num_rqst++]);
414 trace_smb3_hardlink_enter(xid, ses->Suid, tcon->tid, full_path);
415 break;
416 case SMB2_OP_SET_REPARSE:
417 rqst[num_rqst].rq_iov = vars->io_iov;
418 rqst[num_rqst].rq_nvec = ARRAY_SIZE(vars->io_iov);
419
420 rc = SMB2_ioctl_init(tcon, server, &rqst[num_rqst],
421 COMPOUND_FID, COMPOUND_FID,
422 FSCTL_SET_REPARSE_POINT,
423 in_iov[i].iov_base,
424 in_iov[i].iov_len, 0);
425 if (rc)
426 goto finished;
427 smb2_set_next_command(tcon, &rqst[num_rqst]);
428 smb2_set_related(&rqst[num_rqst++]);
429 trace_smb3_set_reparse_compound_enter(xid, ses->Suid,
430 tcon->tid, full_path);
431 break;
432 case SMB2_OP_GET_REPARSE:
433 rqst[num_rqst].rq_iov = vars->io_iov;
434 rqst[num_rqst].rq_nvec = ARRAY_SIZE(vars->io_iov);
435
436 rc = SMB2_ioctl_init(tcon, server, &rqst[num_rqst],
437 COMPOUND_FID, COMPOUND_FID,
438 FSCTL_GET_REPARSE_POINT,
439 NULL, 0, CIFSMaxBufSize);
440 if (rc)
441 goto finished;
442 smb2_set_next_command(tcon, &rqst[num_rqst]);
443 smb2_set_related(&rqst[num_rqst++]);
444 trace_smb3_get_reparse_compound_enter(xid, ses->Suid,
445 tcon->tid, full_path);
446 break;
447 default:
448 cifs_dbg(VFS, "Invalid command\n");
449 rc = -EINVAL;
450 }
451 }
452 if (rc)
453 goto finished;
454
455 /* We already have a handle so we can skip the close */
456 if (cfile)
457 goto after_close;
458 /* Close */
459 flags |= CIFS_CP_CREATE_CLOSE_OP;
460 rqst[num_rqst].rq_iov = &vars->close_iov;
461 rqst[num_rqst].rq_nvec = 1;
462 rc = SMB2_close_init(tcon, server,
463 &rqst[num_rqst], COMPOUND_FID,
464 COMPOUND_FID, false);
465 smb2_set_related(&rqst[num_rqst]);
466 if (rc)
467 goto finished;
468 after_close:
469 num_rqst++;
470
471 if (cfile) {
472 if (retries)
473 for (i = 1; i < num_rqst - 2; i++)
474 smb2_set_replay(server, &rqst[i]);
475
476 rc = compound_send_recv(xid, ses, server,
477 flags, num_rqst - 2,
478 &rqst[1], &resp_buftype[1],
479 &rsp_iov[1]);
480 } else {
481 if (retries)
482 for (i = 0; i < num_rqst; i++)
483 smb2_set_replay(server, &rqst[i]);
484
485 rc = compound_send_recv(xid, ses, server,
486 flags, num_rqst,
487 rqst, resp_buftype,
488 rsp_iov);
489 }
490
491 finished:
492 num_rqst = 0;
493 SMB2_open_free(&rqst[num_rqst++]);
494 if (rc == -EREMCHG) {
495 pr_warn_once("server share %s deleted\n", tcon->tree_name);
496 tcon->need_reconnect = true;
497 }
498
499 for (i = 0; i < num_cmds; i++) {
500 switch (cmds[i]) {
501 case SMB2_OP_QUERY_INFO:
502 idata = in_iov[i].iov_base;
503 if (rc == 0 && cfile && cfile->symlink_target) {
504 idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
505 if (!idata->symlink_target)
506 rc = -ENOMEM;
507 }
508 if (rc == 0) {
509 qi_rsp = (struct smb2_query_info_rsp *)
510 rsp_iov[i + 1].iov_base;
511 rc = smb2_validate_and_copy_iov(
512 le16_to_cpu(qi_rsp->OutputBufferOffset),
513 le32_to_cpu(qi_rsp->OutputBufferLength),
514 &rsp_iov[i + 1], sizeof(idata->fi), (char *)&idata->fi);
515 }
516 SMB2_query_info_free(&rqst[num_rqst++]);
517 if (rc)
518 trace_smb3_query_info_compound_err(xid, ses->Suid,
519 tcon->tid, rc);
520 else
521 trace_smb3_query_info_compound_done(xid, ses->Suid,
522 tcon->tid);
523 break;
524 case SMB2_OP_POSIX_QUERY_INFO:
525 idata = in_iov[i].iov_base;
526 if (rc == 0 && cfile && cfile->symlink_target) {
527 idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
528 if (!idata->symlink_target)
529 rc = -ENOMEM;
530 }
531 if (rc == 0) {
532 qi_rsp = (struct smb2_query_info_rsp *)
533 rsp_iov[i + 1].iov_base;
534 rc = smb2_validate_and_copy_iov(
535 le16_to_cpu(qi_rsp->OutputBufferOffset),
536 le32_to_cpu(qi_rsp->OutputBufferLength),
537 &rsp_iov[i + 1], sizeof(idata->posix_fi) /* add SIDs */,
538 (char *)&idata->posix_fi);
539 }
540 if (rc == 0)
541 rc = parse_posix_sids(idata, &rsp_iov[i + 1]);
542
543 SMB2_query_info_free(&rqst[num_rqst++]);
544 if (rc)
545 trace_smb3_posix_query_info_compound_err(xid, ses->Suid,
546 tcon->tid, rc);
547 else
548 trace_smb3_posix_query_info_compound_done(xid, ses->Suid,
549 tcon->tid);
550 break;
551 case SMB2_OP_DELETE:
552 if (rc)
553 trace_smb3_delete_err(xid, ses->Suid, tcon->tid, rc);
554 else
555 trace_smb3_delete_done(xid, ses->Suid, tcon->tid);
556 break;
557 case SMB2_OP_MKDIR:
558 if (rc)
559 trace_smb3_mkdir_err(xid, ses->Suid, tcon->tid, rc);
560 else
561 trace_smb3_mkdir_done(xid, ses->Suid, tcon->tid);
562 break;
563 case SMB2_OP_HARDLINK:
564 if (rc)
565 trace_smb3_hardlink_err(xid, ses->Suid, tcon->tid, rc);
566 else
567 trace_smb3_hardlink_done(xid, ses->Suid, tcon->tid);
568 SMB2_set_info_free(&rqst[num_rqst++]);
569 break;
570 case SMB2_OP_RENAME:
571 if (rc)
572 trace_smb3_rename_err(xid, ses->Suid, tcon->tid, rc);
573 else
574 trace_smb3_rename_done(xid, ses->Suid, tcon->tid);
575 SMB2_set_info_free(&rqst[num_rqst++]);
576 break;
577 case SMB2_OP_RMDIR:
578 if (rc)
579 trace_smb3_rmdir_err(xid, ses->Suid, tcon->tid, rc);
580 else
581 trace_smb3_rmdir_done(xid, ses->Suid, tcon->tid);
582 SMB2_set_info_free(&rqst[num_rqst++]);
583 break;
584 case SMB2_OP_SET_EOF:
585 if (rc)
586 trace_smb3_set_eof_err(xid, ses->Suid, tcon->tid, rc);
587 else
588 trace_smb3_set_eof_done(xid, ses->Suid, tcon->tid);
589 SMB2_set_info_free(&rqst[num_rqst++]);
590 break;
591 case SMB2_OP_SET_INFO:
592 if (rc)
593 trace_smb3_set_info_compound_err(xid, ses->Suid,
594 tcon->tid, rc);
595 else
596 trace_smb3_set_info_compound_done(xid, ses->Suid,
597 tcon->tid);
598 SMB2_set_info_free(&rqst[num_rqst++]);
599 break;
600 case SMB2_OP_SET_REPARSE:
601 if (rc) {
602 trace_smb3_set_reparse_compound_err(xid, ses->Suid,
603 tcon->tid, rc);
604 } else {
605 trace_smb3_set_reparse_compound_done(xid, ses->Suid,
606 tcon->tid);
607 }
608 SMB2_ioctl_free(&rqst[num_rqst++]);
609 break;
610 case SMB2_OP_GET_REPARSE:
611 if (!rc) {
612 iov = &rsp_iov[i + 1];
613 idata = in_iov[i].iov_base;
614 idata->reparse.io.iov = *iov;
615 idata->reparse.io.buftype = resp_buftype[i + 1];
616 rbuf = reparse_buf_ptr(iov);
617 if (IS_ERR(rbuf)) {
618 rc = PTR_ERR(rbuf);
619 trace_smb3_set_reparse_compound_err(xid, ses->Suid,
620 tcon->tid, rc);
621 } else {
622 idata->reparse.tag = le32_to_cpu(rbuf->ReparseTag);
623 trace_smb3_set_reparse_compound_done(xid, ses->Suid,
624 tcon->tid);
625 }
626 memset(iov, 0, sizeof(*iov));
627 resp_buftype[i + 1] = CIFS_NO_BUFFER;
628 } else {
629 trace_smb3_set_reparse_compound_err(xid, ses->Suid,
630 tcon->tid, rc);
631 }
632 SMB2_ioctl_free(&rqst[num_rqst++]);
633 break;
634 }
635 }
636 SMB2_close_free(&rqst[num_rqst]);
637
638 num_cmds += 2;
639 if (out_iov && out_buftype) {
640 memcpy(out_iov, rsp_iov, num_cmds * sizeof(*out_iov));
641 memcpy(out_buftype, resp_buftype,
642 num_cmds * sizeof(*out_buftype));
643 } else {
644 for (i = 0; i < num_cmds; i++)
645 free_rsp_buf(resp_buftype[i], rsp_iov[i].iov_base);
646 }
647 num_cmds -= 2; /* correct num_cmds as there could be a retry */
648 kfree(vars);
649
650 if (is_replayable_error(rc) &&
651 smb2_should_replay(tcon, &retries, &cur_sleep))
652 goto replay_again;
653
654 if (cfile)
655 cifsFileInfo_put(cfile);
656
657 return rc;
658 }
659
parse_create_response(struct cifs_open_info_data * data,struct cifs_sb_info * cifs_sb,const struct kvec * iov)660 static int parse_create_response(struct cifs_open_info_data *data,
661 struct cifs_sb_info *cifs_sb,
662 const struct kvec *iov)
663 {
664 struct smb2_create_rsp *rsp = iov->iov_base;
665 bool reparse_point = false;
666 u32 tag = 0;
667 int rc = 0;
668
669 switch (rsp->hdr.Status) {
670 case STATUS_IO_REPARSE_TAG_NOT_HANDLED:
671 reparse_point = true;
672 break;
673 case STATUS_STOPPED_ON_SYMLINK:
674 rc = smb2_parse_symlink_response(cifs_sb, iov,
675 &data->symlink_target);
676 if (rc)
677 return rc;
678 tag = IO_REPARSE_TAG_SYMLINK;
679 reparse_point = true;
680 break;
681 case STATUS_SUCCESS:
682 reparse_point = !!(rsp->Flags & SMB2_CREATE_FLAG_REPARSEPOINT);
683 break;
684 }
685 data->reparse_point = reparse_point;
686 data->reparse.tag = tag;
687 return rc;
688 }
689
smb2_query_path_info(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,const char * full_path,struct cifs_open_info_data * data)690 int smb2_query_path_info(const unsigned int xid,
691 struct cifs_tcon *tcon,
692 struct cifs_sb_info *cifs_sb,
693 const char *full_path,
694 struct cifs_open_info_data *data)
695 {
696 __u32 create_options = 0;
697 struct cifsFileInfo *cfile;
698 struct cached_fid *cfid = NULL;
699 struct smb2_hdr *hdr;
700 struct kvec in_iov[2], out_iov[3] = {};
701 int out_buftype[3] = {};
702 int cmds[2];
703 bool islink;
704 int i, num_cmds;
705 int rc, rc2;
706
707 data->adjust_tz = false;
708 data->reparse_point = false;
709
710 /*
711 * BB TODO: Add support for using cached root handle in SMB3.1.1 POSIX.
712 * Create SMB2_query_posix_info worker function to do non-compounded
713 * query when we already have an open file handle for this. For now this
714 * is fast enough (always using the compounded version).
715 */
716 if (!tcon->posix_extensions) {
717 if (*full_path) {
718 rc = -ENOENT;
719 } else {
720 rc = open_cached_dir(xid, tcon, full_path,
721 cifs_sb, false, &cfid);
722 }
723 /* If it is a root and its handle is cached then use it */
724 if (!rc) {
725 if (cfid->file_all_info_is_valid) {
726 memcpy(&data->fi, &cfid->file_all_info,
727 sizeof(data->fi));
728 } else {
729 rc = SMB2_query_info(xid, tcon,
730 cfid->fid.persistent_fid,
731 cfid->fid.volatile_fid,
732 &data->fi);
733 }
734 close_cached_dir(cfid);
735 return rc;
736 }
737 cmds[0] = SMB2_OP_QUERY_INFO;
738 } else {
739 cmds[0] = SMB2_OP_POSIX_QUERY_INFO;
740 }
741
742 in_iov[0].iov_base = data;
743 in_iov[0].iov_len = sizeof(*data);
744 in_iov[1] = in_iov[0];
745
746 cifs_get_readable_path(tcon, full_path, &cfile);
747 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
748 FILE_READ_ATTRIBUTES, FILE_OPEN,
749 create_options, ACL_NO_MODE, in_iov,
750 cmds, 1, cfile, out_iov, out_buftype);
751 hdr = out_iov[0].iov_base;
752 /*
753 * If first iov is unset, then SMB session was dropped or we've got a
754 * cached open file (@cfile).
755 */
756 if (!hdr || out_buftype[0] == CIFS_NO_BUFFER)
757 goto out;
758
759 switch (rc) {
760 case 0:
761 case -EOPNOTSUPP:
762 /*
763 * BB TODO: When support for special files added to Samba
764 * re-verify this path.
765 */
766 rc = parse_create_response(data, cifs_sb, &out_iov[0]);
767 if (rc || !data->reparse_point)
768 goto out;
769
770 if (data->reparse.tag == IO_REPARSE_TAG_SYMLINK) {
771 /* symlink already parsed in create response */
772 num_cmds = 1;
773 } else {
774 cmds[1] = SMB2_OP_GET_REPARSE;
775 num_cmds = 2;
776 }
777 create_options |= OPEN_REPARSE_POINT;
778 cifs_get_readable_path(tcon, full_path, &cfile);
779 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
780 FILE_READ_ATTRIBUTES, FILE_OPEN,
781 create_options, ACL_NO_MODE, in_iov,
782 cmds, num_cmds, cfile, NULL, NULL);
783 break;
784 case -EREMOTE:
785 break;
786 default:
787 if (hdr->Status != STATUS_OBJECT_NAME_INVALID)
788 break;
789 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb,
790 full_path, &islink);
791 if (rc2) {
792 rc = rc2;
793 goto out;
794 }
795 if (islink)
796 rc = -EREMOTE;
797 }
798
799 out:
800 for (i = 0; i < ARRAY_SIZE(out_buftype); i++)
801 free_rsp_buf(out_buftype[i], out_iov[i].iov_base);
802 return rc;
803 }
804
805 int
smb2_mkdir(const unsigned int xid,struct inode * parent_inode,umode_t mode,struct cifs_tcon * tcon,const char * name,struct cifs_sb_info * cifs_sb)806 smb2_mkdir(const unsigned int xid, struct inode *parent_inode, umode_t mode,
807 struct cifs_tcon *tcon, const char *name,
808 struct cifs_sb_info *cifs_sb)
809 {
810 return smb2_compound_op(xid, tcon, cifs_sb, name,
811 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
812 CREATE_NOT_FILE, mode,
813 NULL, &(int){SMB2_OP_MKDIR}, 1,
814 NULL, NULL, NULL);
815 }
816
817 void
smb2_mkdir_setinfo(struct inode * inode,const char * name,struct cifs_sb_info * cifs_sb,struct cifs_tcon * tcon,const unsigned int xid)818 smb2_mkdir_setinfo(struct inode *inode, const char *name,
819 struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
820 const unsigned int xid)
821 {
822 FILE_BASIC_INFO data = {};
823 struct cifsInodeInfo *cifs_i;
824 struct cifsFileInfo *cfile;
825 struct kvec in_iov;
826 u32 dosattrs;
827 int tmprc;
828
829 in_iov.iov_base = &data;
830 in_iov.iov_len = sizeof(data);
831 cifs_i = CIFS_I(inode);
832 dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
833 data.Attributes = cpu_to_le32(dosattrs);
834 cifs_get_writable_path(tcon, name, FIND_WR_ANY, &cfile);
835 tmprc = smb2_compound_op(xid, tcon, cifs_sb, name,
836 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
837 CREATE_NOT_FILE, ACL_NO_MODE, &in_iov,
838 &(int){SMB2_OP_SET_INFO}, 1,
839 cfile, NULL, NULL);
840 if (tmprc == 0)
841 cifs_i->cifsAttrs = dosattrs;
842 }
843
844 int
smb2_rmdir(const unsigned int xid,struct cifs_tcon * tcon,const char * name,struct cifs_sb_info * cifs_sb)845 smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
846 struct cifs_sb_info *cifs_sb)
847 {
848 drop_cached_dir_by_name(xid, tcon, name, cifs_sb);
849 return smb2_compound_op(xid, tcon, cifs_sb, name,
850 DELETE, FILE_OPEN, CREATE_NOT_FILE,
851 ACL_NO_MODE, NULL,
852 &(int){SMB2_OP_RMDIR}, 1,
853 NULL, NULL, NULL);
854 }
855
856 int
smb2_unlink(const unsigned int xid,struct cifs_tcon * tcon,const char * name,struct cifs_sb_info * cifs_sb)857 smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
858 struct cifs_sb_info *cifs_sb)
859 {
860 return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
861 CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
862 ACL_NO_MODE, NULL,
863 &(int){SMB2_OP_DELETE}, 1,
864 NULL, NULL, NULL);
865 }
866
smb2_set_path_attr(const unsigned int xid,struct cifs_tcon * tcon,const char * from_name,const char * to_name,struct cifs_sb_info * cifs_sb,__u32 create_options,__u32 access,int command,struct cifsFileInfo * cfile)867 static int smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
868 const char *from_name, const char *to_name,
869 struct cifs_sb_info *cifs_sb,
870 __u32 create_options, __u32 access,
871 int command, struct cifsFileInfo *cfile)
872 {
873 struct kvec in_iov;
874 __le16 *smb2_to_name = NULL;
875 int rc;
876
877 smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
878 if (smb2_to_name == NULL) {
879 rc = -ENOMEM;
880 goto smb2_rename_path;
881 }
882 in_iov.iov_base = smb2_to_name;
883 in_iov.iov_len = 2 * UniStrnlen((wchar_t *)smb2_to_name, PATH_MAX);
884 rc = smb2_compound_op(xid, tcon, cifs_sb, from_name, access,
885 FILE_OPEN, create_options, ACL_NO_MODE,
886 &in_iov, &command, 1, cfile, NULL, NULL);
887 smb2_rename_path:
888 kfree(smb2_to_name);
889 return rc;
890 }
891
smb2_rename_path(const unsigned int xid,struct cifs_tcon * tcon,struct dentry * source_dentry,const char * from_name,const char * to_name,struct cifs_sb_info * cifs_sb)892 int smb2_rename_path(const unsigned int xid,
893 struct cifs_tcon *tcon,
894 struct dentry *source_dentry,
895 const char *from_name, const char *to_name,
896 struct cifs_sb_info *cifs_sb)
897 {
898 struct cifsFileInfo *cfile;
899 __u32 co = file_create_options(source_dentry);
900
901 drop_cached_dir_by_name(xid, tcon, from_name, cifs_sb);
902 cifs_get_writable_path(tcon, from_name, FIND_WR_WITH_DELETE, &cfile);
903
904 return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
905 co, DELETE, SMB2_OP_RENAME, cfile);
906 }
907
smb2_create_hardlink(const unsigned int xid,struct cifs_tcon * tcon,struct dentry * source_dentry,const char * from_name,const char * to_name,struct cifs_sb_info * cifs_sb)908 int smb2_create_hardlink(const unsigned int xid,
909 struct cifs_tcon *tcon,
910 struct dentry *source_dentry,
911 const char *from_name, const char *to_name,
912 struct cifs_sb_info *cifs_sb)
913 {
914 __u32 co = file_create_options(source_dentry);
915
916 return smb2_set_path_attr(xid, tcon, from_name, to_name,
917 cifs_sb, co, FILE_READ_ATTRIBUTES,
918 SMB2_OP_HARDLINK, NULL);
919 }
920
921 int
smb2_set_path_size(const unsigned int xid,struct cifs_tcon * tcon,const char * full_path,__u64 size,struct cifs_sb_info * cifs_sb,bool set_alloc)922 smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
923 const char *full_path, __u64 size,
924 struct cifs_sb_info *cifs_sb, bool set_alloc)
925 {
926 struct cifsFileInfo *cfile;
927 struct kvec in_iov;
928 __le64 eof = cpu_to_le64(size);
929
930 in_iov.iov_base = &eof;
931 in_iov.iov_len = sizeof(eof);
932 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
933 return smb2_compound_op(xid, tcon, cifs_sb, full_path,
934 FILE_WRITE_DATA, FILE_OPEN,
935 0, ACL_NO_MODE, &in_iov,
936 &(int){SMB2_OP_SET_EOF}, 1,
937 cfile, NULL, NULL);
938 }
939
940 int
smb2_set_file_info(struct inode * inode,const char * full_path,FILE_BASIC_INFO * buf,const unsigned int xid)941 smb2_set_file_info(struct inode *inode, const char *full_path,
942 FILE_BASIC_INFO *buf, const unsigned int xid)
943 {
944 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
945 struct tcon_link *tlink;
946 struct cifs_tcon *tcon;
947 struct cifsFileInfo *cfile;
948 struct kvec in_iov = { .iov_base = buf, .iov_len = sizeof(*buf), };
949 int rc;
950
951 if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
952 (buf->LastWriteTime == 0) && (buf->ChangeTime == 0) &&
953 (buf->Attributes == 0))
954 return 0; /* would be a no op, no sense sending this */
955
956 tlink = cifs_sb_tlink(cifs_sb);
957 if (IS_ERR(tlink))
958 return PTR_ERR(tlink);
959 tcon = tlink_tcon(tlink);
960
961 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
962 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
963 FILE_WRITE_ATTRIBUTES, FILE_OPEN,
964 0, ACL_NO_MODE, &in_iov,
965 &(int){SMB2_OP_SET_INFO}, 1,
966 cfile, NULL, NULL);
967 cifs_put_tlink(tlink);
968 return rc;
969 }
970
smb2_get_reparse_inode(struct cifs_open_info_data * data,struct super_block * sb,const unsigned int xid,struct cifs_tcon * tcon,const char * full_path,struct kvec * iov)971 struct inode *smb2_get_reparse_inode(struct cifs_open_info_data *data,
972 struct super_block *sb,
973 const unsigned int xid,
974 struct cifs_tcon *tcon,
975 const char *full_path,
976 struct kvec *iov)
977 {
978 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
979 struct cifsFileInfo *cfile;
980 struct inode *new = NULL;
981 struct kvec in_iov[2];
982 int cmds[2];
983 int da, co, cd;
984 int rc;
985
986 da = SYNCHRONIZE | DELETE |
987 FILE_READ_ATTRIBUTES |
988 FILE_WRITE_ATTRIBUTES;
989 co = CREATE_NOT_DIR | OPEN_REPARSE_POINT;
990 cd = FILE_CREATE;
991 cmds[0] = SMB2_OP_SET_REPARSE;
992 in_iov[0] = *iov;
993 in_iov[1].iov_base = data;
994 in_iov[1].iov_len = sizeof(*data);
995
996 if (tcon->posix_extensions) {
997 cmds[1] = SMB2_OP_POSIX_QUERY_INFO;
998 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
999 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
1000 da, cd, co, ACL_NO_MODE, in_iov,
1001 cmds, 2, cfile, NULL, NULL);
1002 if (!rc) {
1003 rc = smb311_posix_get_inode_info(&new, full_path,
1004 data, sb, xid);
1005 }
1006 } else {
1007 cmds[1] = SMB2_OP_QUERY_INFO;
1008 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
1009 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
1010 da, cd, co, ACL_NO_MODE, in_iov,
1011 cmds, 2, cfile, NULL, NULL);
1012 if (!rc) {
1013 rc = cifs_get_inode_info(&new, full_path,
1014 data, sb, xid, NULL);
1015 }
1016 }
1017 return rc ? ERR_PTR(rc) : new;
1018 }
1019
smb2_query_reparse_point(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,const char * full_path,u32 * tag,struct kvec * rsp,int * rsp_buftype)1020 int smb2_query_reparse_point(const unsigned int xid,
1021 struct cifs_tcon *tcon,
1022 struct cifs_sb_info *cifs_sb,
1023 const char *full_path,
1024 u32 *tag, struct kvec *rsp,
1025 int *rsp_buftype)
1026 {
1027 struct cifs_open_info_data data = {};
1028 struct cifsFileInfo *cfile;
1029 struct kvec in_iov = { .iov_base = &data, .iov_len = sizeof(data), };
1030 int rc;
1031
1032 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1033
1034 cifs_get_readable_path(tcon, full_path, &cfile);
1035 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
1036 FILE_READ_ATTRIBUTES, FILE_OPEN,
1037 OPEN_REPARSE_POINT, ACL_NO_MODE, &in_iov,
1038 &(int){SMB2_OP_GET_REPARSE}, 1,
1039 cfile, NULL, NULL);
1040 if (rc)
1041 goto out;
1042
1043 *tag = data.reparse.tag;
1044 *rsp = data.reparse.io.iov;
1045 *rsp_buftype = data.reparse.io.buftype;
1046 memset(&data.reparse.io.iov, 0, sizeof(data.reparse.io.iov));
1047 data.reparse.io.buftype = CIFS_NO_BUFFER;
1048 out:
1049 cifs_free_open_info(&data);
1050 return rc;
1051 }
1052