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
29 static void
free_set_inf_compound(struct smb_rqst * rqst)30 free_set_inf_compound(struct smb_rqst *rqst)
31 {
32 if (rqst[1].rq_iov)
33 SMB2_set_info_free(&rqst[1]);
34 if (rqst[2].rq_iov)
35 SMB2_close_free(&rqst[2]);
36 }
37
38
39 struct cop_vars {
40 struct cifs_open_parms oparms;
41 struct kvec rsp_iov[3];
42 struct smb_rqst rqst[3];
43 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
44 struct kvec qi_iov[1];
45 struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
46 struct kvec close_iov[1];
47 struct smb2_file_rename_info rename_info;
48 struct smb2_file_link_info link_info;
49 };
50
51 /*
52 * note: If cfile is passed, the reference to it is dropped here.
53 * So make sure that you do not reuse cfile after return from this func.
54 *
55 * If passing @err_iov and @err_buftype, ensure to make them both large enough (>= 3) to hold all
56 * error responses. Caller is also responsible for freeing them up.
57 */
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,void * ptr,int command,struct cifsFileInfo * cfile,struct kvec * err_iov,int * err_buftype)58 static int smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
59 struct cifs_sb_info *cifs_sb, const char *full_path,
60 __u32 desired_access, __u32 create_disposition, __u32 create_options,
61 umode_t mode, void *ptr, int command, struct cifsFileInfo *cfile,
62 struct kvec *err_iov, int *err_buftype)
63 {
64 struct cop_vars *vars = NULL;
65 struct kvec *rsp_iov;
66 struct smb_rqst *rqst;
67 int rc;
68 __le16 *utf16_path = NULL;
69 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
70 struct cifs_fid fid;
71 struct cifs_ses *ses = tcon->ses;
72 struct TCP_Server_Info *server;
73 int num_rqst = 0;
74 int resp_buftype[3];
75 struct smb2_query_info_rsp *qi_rsp = NULL;
76 struct cifs_open_info_data *idata;
77 int flags = 0;
78 __u8 delete_pending[8] = {1, 0, 0, 0, 0, 0, 0, 0};
79 unsigned int size[2];
80 void *data[2];
81 int len;
82
83 vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
84 if (vars == NULL)
85 return -ENOMEM;
86 rqst = &vars->rqst[0];
87 rsp_iov = &vars->rsp_iov[0];
88
89 server = cifs_pick_channel(ses);
90
91 if (smb3_encryption_required(tcon))
92 flags |= CIFS_TRANSFORM_REQ;
93
94 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
95
96 /* We already have a handle so we can skip the open */
97 if (cfile)
98 goto after_open;
99
100 /* Open */
101 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
102 if (!utf16_path) {
103 rc = -ENOMEM;
104 goto finished;
105 }
106
107 vars->oparms = (struct cifs_open_parms) {
108 .tcon = tcon,
109 .path = full_path,
110 .desired_access = desired_access,
111 .disposition = create_disposition,
112 .create_options = cifs_create_options(cifs_sb, create_options),
113 .fid = &fid,
114 .mode = mode,
115 .cifs_sb = cifs_sb,
116 };
117
118 rqst[num_rqst].rq_iov = &vars->open_iov[0];
119 rqst[num_rqst].rq_nvec = SMB2_CREATE_IOV_SIZE;
120 rc = SMB2_open_init(tcon, server,
121 &rqst[num_rqst], &oplock, &vars->oparms,
122 utf16_path);
123 kfree(utf16_path);
124 if (rc)
125 goto finished;
126
127 smb2_set_next_command(tcon, &rqst[num_rqst]);
128 after_open:
129 num_rqst++;
130 rc = 0;
131
132 /* Operation */
133 switch (command) {
134 case SMB2_OP_QUERY_INFO:
135 rqst[num_rqst].rq_iov = &vars->qi_iov[0];
136 rqst[num_rqst].rq_nvec = 1;
137
138 if (cfile)
139 rc = SMB2_query_info_init(tcon, server,
140 &rqst[num_rqst],
141 cfile->fid.persistent_fid,
142 cfile->fid.volatile_fid,
143 FILE_ALL_INFORMATION,
144 SMB2_O_INFO_FILE, 0,
145 sizeof(struct smb2_file_all_info) +
146 PATH_MAX * 2, 0, NULL);
147 else {
148 rc = SMB2_query_info_init(tcon, server,
149 &rqst[num_rqst],
150 COMPOUND_FID,
151 COMPOUND_FID,
152 FILE_ALL_INFORMATION,
153 SMB2_O_INFO_FILE, 0,
154 sizeof(struct smb2_file_all_info) +
155 PATH_MAX * 2, 0, NULL);
156 if (!rc) {
157 smb2_set_next_command(tcon, &rqst[num_rqst]);
158 smb2_set_related(&rqst[num_rqst]);
159 }
160 }
161
162 if (rc)
163 goto finished;
164 num_rqst++;
165 trace_smb3_query_info_compound_enter(xid, ses->Suid, tcon->tid,
166 full_path);
167 break;
168 case SMB2_OP_POSIX_QUERY_INFO:
169 rqst[num_rqst].rq_iov = &vars->qi_iov[0];
170 rqst[num_rqst].rq_nvec = 1;
171
172 if (cfile)
173 rc = SMB2_query_info_init(tcon, server,
174 &rqst[num_rqst],
175 cfile->fid.persistent_fid,
176 cfile->fid.volatile_fid,
177 SMB_FIND_FILE_POSIX_INFO,
178 SMB2_O_INFO_FILE, 0,
179 /* TBD: fix following to allow for longer SIDs */
180 sizeof(struct smb311_posix_qinfo *) + (PATH_MAX * 2) +
181 (sizeof(struct cifs_sid) * 2), 0, NULL);
182 else {
183 rc = SMB2_query_info_init(tcon, server,
184 &rqst[num_rqst],
185 COMPOUND_FID,
186 COMPOUND_FID,
187 SMB_FIND_FILE_POSIX_INFO,
188 SMB2_O_INFO_FILE, 0,
189 sizeof(struct smb311_posix_qinfo *) + (PATH_MAX * 2) +
190 (sizeof(struct cifs_sid) * 2), 0, NULL);
191 if (!rc) {
192 smb2_set_next_command(tcon, &rqst[num_rqst]);
193 smb2_set_related(&rqst[num_rqst]);
194 }
195 }
196
197 if (rc)
198 goto finished;
199 num_rqst++;
200 trace_smb3_posix_query_info_compound_enter(xid, ses->Suid, tcon->tid, full_path);
201 break;
202 case SMB2_OP_DELETE:
203 trace_smb3_delete_enter(xid, ses->Suid, tcon->tid, full_path);
204 break;
205 case SMB2_OP_MKDIR:
206 /*
207 * Directories are created through parameters in the
208 * SMB2_open() call.
209 */
210 trace_smb3_mkdir_enter(xid, ses->Suid, tcon->tid, full_path);
211 break;
212 case SMB2_OP_RMDIR:
213 rqst[num_rqst].rq_iov = &vars->si_iov[0];
214 rqst[num_rqst].rq_nvec = 1;
215
216 size[0] = 1; /* sizeof __u8 See MS-FSCC section 2.4.11 */
217 data[0] = &delete_pending[0];
218
219 rc = SMB2_set_info_init(tcon, server,
220 &rqst[num_rqst], COMPOUND_FID,
221 COMPOUND_FID, current->tgid,
222 FILE_DISPOSITION_INFORMATION,
223 SMB2_O_INFO_FILE, 0, data, size);
224 if (rc)
225 goto finished;
226 smb2_set_next_command(tcon, &rqst[num_rqst]);
227 smb2_set_related(&rqst[num_rqst++]);
228 trace_smb3_rmdir_enter(xid, ses->Suid, tcon->tid, full_path);
229 break;
230 case SMB2_OP_SET_EOF:
231 rqst[num_rqst].rq_iov = &vars->si_iov[0];
232 rqst[num_rqst].rq_nvec = 1;
233
234 size[0] = 8; /* sizeof __le64 */
235 data[0] = ptr;
236
237 if (cfile) {
238 rc = SMB2_set_info_init(tcon, server,
239 &rqst[num_rqst],
240 cfile->fid.persistent_fid,
241 cfile->fid.volatile_fid,
242 current->tgid,
243 FILE_END_OF_FILE_INFORMATION,
244 SMB2_O_INFO_FILE, 0,
245 data, size);
246 } else {
247 rc = SMB2_set_info_init(tcon, server,
248 &rqst[num_rqst],
249 COMPOUND_FID,
250 COMPOUND_FID,
251 current->tgid,
252 FILE_END_OF_FILE_INFORMATION,
253 SMB2_O_INFO_FILE, 0,
254 data, size);
255 if (!rc) {
256 smb2_set_next_command(tcon, &rqst[num_rqst]);
257 smb2_set_related(&rqst[num_rqst]);
258 }
259 }
260 if (rc)
261 goto finished;
262 num_rqst++;
263 trace_smb3_set_eof_enter(xid, ses->Suid, tcon->tid, full_path);
264 break;
265 case SMB2_OP_SET_INFO:
266 rqst[num_rqst].rq_iov = &vars->si_iov[0];
267 rqst[num_rqst].rq_nvec = 1;
268
269
270 size[0] = sizeof(FILE_BASIC_INFO);
271 data[0] = ptr;
272
273 if (cfile)
274 rc = SMB2_set_info_init(tcon, server,
275 &rqst[num_rqst],
276 cfile->fid.persistent_fid,
277 cfile->fid.volatile_fid, current->tgid,
278 FILE_BASIC_INFORMATION,
279 SMB2_O_INFO_FILE, 0, data, size);
280 else {
281 rc = SMB2_set_info_init(tcon, server,
282 &rqst[num_rqst],
283 COMPOUND_FID,
284 COMPOUND_FID, current->tgid,
285 FILE_BASIC_INFORMATION,
286 SMB2_O_INFO_FILE, 0, data, size);
287 if (!rc) {
288 smb2_set_next_command(tcon, &rqst[num_rqst]);
289 smb2_set_related(&rqst[num_rqst]);
290 }
291 }
292
293 if (rc)
294 goto finished;
295 num_rqst++;
296 trace_smb3_set_info_compound_enter(xid, ses->Suid, tcon->tid,
297 full_path);
298 break;
299 case SMB2_OP_RENAME:
300 rqst[num_rqst].rq_iov = &vars->si_iov[0];
301 rqst[num_rqst].rq_nvec = 2;
302
303 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
304
305 vars->rename_info.ReplaceIfExists = 1;
306 vars->rename_info.RootDirectory = 0;
307 vars->rename_info.FileNameLength = cpu_to_le32(len);
308
309 size[0] = sizeof(struct smb2_file_rename_info);
310 data[0] = &vars->rename_info;
311
312 size[1] = len + 2 /* null */;
313 data[1] = (__le16 *)ptr;
314
315 if (cfile)
316 rc = SMB2_set_info_init(tcon, server,
317 &rqst[num_rqst],
318 cfile->fid.persistent_fid,
319 cfile->fid.volatile_fid,
320 current->tgid, FILE_RENAME_INFORMATION,
321 SMB2_O_INFO_FILE, 0, data, size);
322 else {
323 rc = SMB2_set_info_init(tcon, server,
324 &rqst[num_rqst],
325 COMPOUND_FID, COMPOUND_FID,
326 current->tgid, FILE_RENAME_INFORMATION,
327 SMB2_O_INFO_FILE, 0, data, size);
328 if (!rc) {
329 smb2_set_next_command(tcon, &rqst[num_rqst]);
330 smb2_set_related(&rqst[num_rqst]);
331 }
332 }
333 if (rc)
334 goto finished;
335 num_rqst++;
336 trace_smb3_rename_enter(xid, ses->Suid, tcon->tid, full_path);
337 break;
338 case SMB2_OP_HARDLINK:
339 rqst[num_rqst].rq_iov = &vars->si_iov[0];
340 rqst[num_rqst].rq_nvec = 2;
341
342 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
343
344 vars->link_info.ReplaceIfExists = 0;
345 vars->link_info.RootDirectory = 0;
346 vars->link_info.FileNameLength = cpu_to_le32(len);
347
348 size[0] = sizeof(struct smb2_file_link_info);
349 data[0] = &vars->link_info;
350
351 size[1] = len + 2 /* null */;
352 data[1] = (__le16 *)ptr;
353
354 rc = SMB2_set_info_init(tcon, server,
355 &rqst[num_rqst], COMPOUND_FID,
356 COMPOUND_FID, current->tgid,
357 FILE_LINK_INFORMATION,
358 SMB2_O_INFO_FILE, 0, data, size);
359 if (rc)
360 goto finished;
361 smb2_set_next_command(tcon, &rqst[num_rqst]);
362 smb2_set_related(&rqst[num_rqst++]);
363 trace_smb3_hardlink_enter(xid, ses->Suid, tcon->tid, full_path);
364 break;
365 default:
366 cifs_dbg(VFS, "Invalid command\n");
367 rc = -EINVAL;
368 }
369 if (rc)
370 goto finished;
371
372 /* We already have a handle so we can skip the close */
373 if (cfile)
374 goto after_close;
375 /* Close */
376 flags |= CIFS_CP_CREATE_CLOSE_OP;
377 rqst[num_rqst].rq_iov = &vars->close_iov[0];
378 rqst[num_rqst].rq_nvec = 1;
379 rc = SMB2_close_init(tcon, server,
380 &rqst[num_rqst], COMPOUND_FID,
381 COMPOUND_FID, false);
382 smb2_set_related(&rqst[num_rqst]);
383 if (rc)
384 goto finished;
385 after_close:
386 num_rqst++;
387
388 if (cfile) {
389 rc = compound_send_recv(xid, ses, server,
390 flags, num_rqst - 2,
391 &rqst[1], &resp_buftype[1],
392 &rsp_iov[1]);
393 } else
394 rc = compound_send_recv(xid, ses, server,
395 flags, num_rqst,
396 rqst, resp_buftype,
397 rsp_iov);
398
399 finished:
400 SMB2_open_free(&rqst[0]);
401 if (rc == -EREMCHG) {
402 pr_warn_once("server share %s deleted\n", tcon->tree_name);
403 tcon->need_reconnect = true;
404 }
405
406 switch (command) {
407 case SMB2_OP_QUERY_INFO:
408 idata = ptr;
409 if (rc == 0 && cfile && cfile->symlink_target) {
410 idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
411 if (!idata->symlink_target)
412 rc = -ENOMEM;
413 }
414 if (rc == 0) {
415 qi_rsp = (struct smb2_query_info_rsp *)
416 rsp_iov[1].iov_base;
417 rc = smb2_validate_and_copy_iov(
418 le16_to_cpu(qi_rsp->OutputBufferOffset),
419 le32_to_cpu(qi_rsp->OutputBufferLength),
420 &rsp_iov[1], sizeof(idata->fi), (char *)&idata->fi);
421 }
422 if (rqst[1].rq_iov)
423 SMB2_query_info_free(&rqst[1]);
424 if (rqst[2].rq_iov)
425 SMB2_close_free(&rqst[2]);
426 if (rc)
427 trace_smb3_query_info_compound_err(xid, ses->Suid,
428 tcon->tid, rc);
429 else
430 trace_smb3_query_info_compound_done(xid, ses->Suid,
431 tcon->tid);
432 break;
433 case SMB2_OP_POSIX_QUERY_INFO:
434 idata = ptr;
435 if (rc == 0 && cfile && cfile->symlink_target) {
436 idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
437 if (!idata->symlink_target)
438 rc = -ENOMEM;
439 }
440 if (rc == 0) {
441 qi_rsp = (struct smb2_query_info_rsp *)
442 rsp_iov[1].iov_base;
443 rc = smb2_validate_and_copy_iov(
444 le16_to_cpu(qi_rsp->OutputBufferOffset),
445 le32_to_cpu(qi_rsp->OutputBufferLength),
446 &rsp_iov[1], sizeof(idata->posix_fi) /* add SIDs */,
447 (char *)&idata->posix_fi);
448 }
449 if (rqst[1].rq_iov)
450 SMB2_query_info_free(&rqst[1]);
451 if (rqst[2].rq_iov)
452 SMB2_close_free(&rqst[2]);
453 if (rc)
454 trace_smb3_posix_query_info_compound_err(xid, ses->Suid, tcon->tid, rc);
455 else
456 trace_smb3_posix_query_info_compound_done(xid, ses->Suid, tcon->tid);
457 break;
458 case SMB2_OP_DELETE:
459 if (rc)
460 trace_smb3_delete_err(xid, ses->Suid, tcon->tid, rc);
461 else
462 trace_smb3_delete_done(xid, ses->Suid, tcon->tid);
463 if (rqst[1].rq_iov)
464 SMB2_close_free(&rqst[1]);
465 break;
466 case SMB2_OP_MKDIR:
467 if (rc)
468 trace_smb3_mkdir_err(xid, ses->Suid, tcon->tid, rc);
469 else
470 trace_smb3_mkdir_done(xid, ses->Suid, tcon->tid);
471 if (rqst[1].rq_iov)
472 SMB2_close_free(&rqst[1]);
473 break;
474 case SMB2_OP_HARDLINK:
475 if (rc)
476 trace_smb3_hardlink_err(xid, ses->Suid, tcon->tid, rc);
477 else
478 trace_smb3_hardlink_done(xid, ses->Suid, tcon->tid);
479 free_set_inf_compound(rqst);
480 break;
481 case SMB2_OP_RENAME:
482 if (rc)
483 trace_smb3_rename_err(xid, ses->Suid, tcon->tid, rc);
484 else
485 trace_smb3_rename_done(xid, ses->Suid, tcon->tid);
486 free_set_inf_compound(rqst);
487 break;
488 case SMB2_OP_RMDIR:
489 if (rc)
490 trace_smb3_rmdir_err(xid, ses->Suid, tcon->tid, rc);
491 else
492 trace_smb3_rmdir_done(xid, ses->Suid, tcon->tid);
493 free_set_inf_compound(rqst);
494 break;
495 case SMB2_OP_SET_EOF:
496 if (rc)
497 trace_smb3_set_eof_err(xid, ses->Suid, tcon->tid, rc);
498 else
499 trace_smb3_set_eof_done(xid, ses->Suid, tcon->tid);
500 free_set_inf_compound(rqst);
501 break;
502 case SMB2_OP_SET_INFO:
503 if (rc)
504 trace_smb3_set_info_compound_err(xid, ses->Suid,
505 tcon->tid, rc);
506 else
507 trace_smb3_set_info_compound_done(xid, ses->Suid,
508 tcon->tid);
509 free_set_inf_compound(rqst);
510 break;
511 }
512
513 if (cfile)
514 cifsFileInfo_put(cfile);
515
516 if (rc && err_iov && err_buftype) {
517 memcpy(err_iov, rsp_iov, 3 * sizeof(*err_iov));
518 memcpy(err_buftype, resp_buftype, 3 * sizeof(*err_buftype));
519 } else {
520 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
521 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
522 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
523 }
524 kfree(vars);
525 return rc;
526 }
527
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,bool * adjust_tz,bool * reparse)528 int smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
529 struct cifs_sb_info *cifs_sb, const char *full_path,
530 struct cifs_open_info_data *data, bool *adjust_tz, bool *reparse)
531 {
532 __u32 create_options = 0;
533 struct cifsFileInfo *cfile;
534 struct cached_fid *cfid = NULL;
535 struct kvec err_iov[3] = {};
536 int err_buftype[3] = {};
537 bool islink;
538 int rc, rc2;
539
540 *adjust_tz = false;
541 *reparse = false;
542
543 if (strcmp(full_path, ""))
544 rc = -ENOENT;
545 else
546 rc = open_cached_dir(xid, tcon, full_path, cifs_sb, false, &cfid);
547 /* If it is a root and its handle is cached then use it */
548 if (!rc) {
549 if (cfid->file_all_info_is_valid) {
550 memcpy(&data->fi, &cfid->file_all_info, sizeof(data->fi));
551 } else {
552 rc = SMB2_query_info(xid, tcon, cfid->fid.persistent_fid,
553 cfid->fid.volatile_fid, &data->fi);
554 }
555 close_cached_dir(cfid);
556 return rc;
557 }
558
559 cifs_get_readable_path(tcon, full_path, &cfile);
560 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES, FILE_OPEN,
561 create_options, ACL_NO_MODE, data, SMB2_OP_QUERY_INFO, cfile,
562 err_iov, err_buftype);
563 if (rc) {
564 struct smb2_hdr *hdr = err_iov[0].iov_base;
565
566 if (unlikely(!hdr || err_buftype[0] == CIFS_NO_BUFFER))
567 goto out;
568 if (rc == -EOPNOTSUPP && hdr->Command == SMB2_CREATE &&
569 hdr->Status == STATUS_STOPPED_ON_SYMLINK) {
570 rc = smb2_parse_symlink_response(cifs_sb, err_iov,
571 &data->symlink_target);
572 if (rc)
573 goto out;
574
575 *reparse = true;
576 create_options |= OPEN_REPARSE_POINT;
577
578 /* Failed on a symbolic link - query a reparse point info */
579 cifs_get_readable_path(tcon, full_path, &cfile);
580 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
581 FILE_READ_ATTRIBUTES, FILE_OPEN,
582 create_options, ACL_NO_MODE, data,
583 SMB2_OP_QUERY_INFO, cfile, NULL, NULL);
584 goto out;
585 } else if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) {
586 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb,
587 full_path, &islink);
588 if (rc2) {
589 rc = rc2;
590 goto out;
591 }
592 if (islink)
593 rc = -EREMOTE;
594 }
595 }
596
597 out:
598 free_rsp_buf(err_buftype[0], err_iov[0].iov_base);
599 free_rsp_buf(err_buftype[1], err_iov[1].iov_base);
600 free_rsp_buf(err_buftype[2], err_iov[2].iov_base);
601 return rc;
602 }
603
604
smb311_posix_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,bool * adjust_tz,bool * reparse)605 int smb311_posix_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
606 struct cifs_sb_info *cifs_sb, const char *full_path,
607 struct cifs_open_info_data *data, bool *adjust_tz, bool *reparse)
608 {
609 int rc;
610 __u32 create_options = 0;
611 struct cifsFileInfo *cfile;
612 struct kvec err_iov[3] = {};
613 int err_buftype[3] = {};
614
615 *adjust_tz = false;
616 *reparse = false;
617
618 /*
619 * BB TODO: Add support for using the cached root handle.
620 * Create SMB2_query_posix_info worker function to do non-compounded query
621 * when we already have an open file handle for this. For now this is fast enough
622 * (always using the compounded version).
623 */
624
625 cifs_get_readable_path(tcon, full_path, &cfile);
626 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES, FILE_OPEN,
627 create_options, ACL_NO_MODE, data, SMB2_OP_POSIX_QUERY_INFO, cfile,
628 err_iov, err_buftype);
629 if (rc == -EOPNOTSUPP) {
630 /* BB TODO: When support for special files added to Samba re-verify this path */
631 if (err_iov[0].iov_base && err_buftype[0] != CIFS_NO_BUFFER &&
632 ((struct smb2_hdr *)err_iov[0].iov_base)->Command == SMB2_CREATE &&
633 ((struct smb2_hdr *)err_iov[0].iov_base)->Status == STATUS_STOPPED_ON_SYMLINK) {
634 rc = smb2_parse_symlink_response(cifs_sb, err_iov, &data->symlink_target);
635 if (rc)
636 goto out;
637 }
638 *reparse = true;
639 create_options |= OPEN_REPARSE_POINT;
640
641 /* Failed on a symbolic link - query a reparse point info */
642 cifs_get_readable_path(tcon, full_path, &cfile);
643 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES,
644 FILE_OPEN, create_options, ACL_NO_MODE, data,
645 SMB2_OP_POSIX_QUERY_INFO, cfile, NULL, NULL);
646 }
647
648 out:
649 free_rsp_buf(err_buftype[0], err_iov[0].iov_base);
650 free_rsp_buf(err_buftype[1], err_iov[1].iov_base);
651 free_rsp_buf(err_buftype[2], err_iov[2].iov_base);
652 return rc;
653 }
654
655 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)656 smb2_mkdir(const unsigned int xid, struct inode *parent_inode, umode_t mode,
657 struct cifs_tcon *tcon, const char *name,
658 struct cifs_sb_info *cifs_sb)
659 {
660 return smb2_compound_op(xid, tcon, cifs_sb, name,
661 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
662 CREATE_NOT_FILE, mode, NULL, SMB2_OP_MKDIR,
663 NULL, NULL, NULL);
664 }
665
666 void
smb2_mkdir_setinfo(struct inode * inode,const char * name,struct cifs_sb_info * cifs_sb,struct cifs_tcon * tcon,const unsigned int xid)667 smb2_mkdir_setinfo(struct inode *inode, const char *name,
668 struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
669 const unsigned int xid)
670 {
671 FILE_BASIC_INFO data;
672 struct cifsInodeInfo *cifs_i;
673 struct cifsFileInfo *cfile;
674 u32 dosattrs;
675 int tmprc;
676
677 memset(&data, 0, sizeof(data));
678 cifs_i = CIFS_I(inode);
679 dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
680 data.Attributes = cpu_to_le32(dosattrs);
681 cifs_get_writable_path(tcon, name, FIND_WR_ANY, &cfile);
682 tmprc = smb2_compound_op(xid, tcon, cifs_sb, name,
683 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
684 CREATE_NOT_FILE, ACL_NO_MODE,
685 &data, SMB2_OP_SET_INFO, cfile, NULL, NULL);
686 if (tmprc == 0)
687 cifs_i->cifsAttrs = dosattrs;
688 }
689
690 int
smb2_rmdir(const unsigned int xid,struct cifs_tcon * tcon,const char * name,struct cifs_sb_info * cifs_sb)691 smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
692 struct cifs_sb_info *cifs_sb)
693 {
694 drop_cached_dir_by_name(xid, tcon, name, cifs_sb);
695 return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
696 CREATE_NOT_FILE, ACL_NO_MODE,
697 NULL, SMB2_OP_RMDIR, NULL, NULL, NULL);
698 }
699
700 int
smb2_unlink(const unsigned int xid,struct cifs_tcon * tcon,const char * name,struct cifs_sb_info * cifs_sb)701 smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
702 struct cifs_sb_info *cifs_sb)
703 {
704 return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
705 CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
706 ACL_NO_MODE, NULL, SMB2_OP_DELETE, NULL, NULL, NULL);
707 }
708
709 static int
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 access,int command,struct cifsFileInfo * cfile)710 smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
711 const char *from_name, const char *to_name,
712 struct cifs_sb_info *cifs_sb, __u32 access, int command,
713 struct cifsFileInfo *cfile)
714 {
715 __le16 *smb2_to_name = NULL;
716 int rc;
717
718 smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
719 if (smb2_to_name == NULL) {
720 rc = -ENOMEM;
721 goto smb2_rename_path;
722 }
723 rc = smb2_compound_op(xid, tcon, cifs_sb, from_name, access,
724 FILE_OPEN, 0, ACL_NO_MODE, smb2_to_name,
725 command, cfile, NULL, NULL);
726 smb2_rename_path:
727 kfree(smb2_to_name);
728 return rc;
729 }
730
731 int
smb2_rename_path(const unsigned int xid,struct cifs_tcon * tcon,const char * from_name,const char * to_name,struct cifs_sb_info * cifs_sb)732 smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
733 const char *from_name, const char *to_name,
734 struct cifs_sb_info *cifs_sb)
735 {
736 struct cifsFileInfo *cfile;
737
738 drop_cached_dir_by_name(xid, tcon, from_name, cifs_sb);
739 cifs_get_writable_path(tcon, from_name, FIND_WR_WITH_DELETE, &cfile);
740
741 return smb2_set_path_attr(xid, tcon, from_name, to_name,
742 cifs_sb, DELETE, SMB2_OP_RENAME, cfile);
743 }
744
745 int
smb2_create_hardlink(const unsigned int xid,struct cifs_tcon * tcon,const char * from_name,const char * to_name,struct cifs_sb_info * cifs_sb)746 smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
747 const char *from_name, const char *to_name,
748 struct cifs_sb_info *cifs_sb)
749 {
750 return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
751 FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK,
752 NULL);
753 }
754
755 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)756 smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
757 const char *full_path, __u64 size,
758 struct cifs_sb_info *cifs_sb, bool set_alloc)
759 {
760 __le64 eof = cpu_to_le64(size);
761 struct cifsFileInfo *cfile;
762
763 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
764 return smb2_compound_op(xid, tcon, cifs_sb, full_path,
765 FILE_WRITE_DATA, FILE_OPEN, 0, ACL_NO_MODE,
766 &eof, SMB2_OP_SET_EOF, cfile, NULL, NULL);
767 }
768
769 int
smb2_set_file_info(struct inode * inode,const char * full_path,FILE_BASIC_INFO * buf,const unsigned int xid)770 smb2_set_file_info(struct inode *inode, const char *full_path,
771 FILE_BASIC_INFO *buf, const unsigned int xid)
772 {
773 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
774 struct tcon_link *tlink;
775 struct cifs_tcon *tcon;
776 struct cifsFileInfo *cfile;
777 int rc;
778
779 if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
780 (buf->LastWriteTime == 0) && (buf->ChangeTime == 0) &&
781 (buf->Attributes == 0))
782 return 0; /* would be a no op, no sense sending this */
783
784 tlink = cifs_sb_tlink(cifs_sb);
785 if (IS_ERR(tlink))
786 return PTR_ERR(tlink);
787 tcon = tlink_tcon(tlink);
788
789 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
790 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
791 FILE_WRITE_ATTRIBUTES, FILE_OPEN,
792 0, ACL_NO_MODE, buf, SMB2_OP_SET_INFO, cfile,
793 NULL, NULL);
794 cifs_put_tlink(tlink);
795 return rc;
796 }
797