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,__u8 ** extbuf,size_t * extbuflen,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 __u8 **extbuf, size_t *extbuflen,
63 struct kvec *err_iov, int *err_buftype)
64 {
65 struct cop_vars *vars = NULL;
66 struct kvec *rsp_iov;
67 struct smb_rqst *rqst;
68 int rc;
69 __le16 *utf16_path = NULL;
70 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
71 struct cifs_fid fid;
72 struct cifs_ses *ses = tcon->ses;
73 struct TCP_Server_Info *server;
74 int num_rqst = 0;
75 int resp_buftype[3];
76 struct smb2_query_info_rsp *qi_rsp = NULL;
77 struct cifs_open_info_data *idata;
78 int flags = 0;
79 __u8 delete_pending[8] = {1, 0, 0, 0, 0, 0, 0, 0};
80 unsigned int size[2];
81 void *data[2];
82 int len;
83
84 vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
85 if (vars == NULL)
86 return -ENOMEM;
87 rqst = &vars->rqst[0];
88 rsp_iov = &vars->rsp_iov[0];
89
90 server = cifs_pick_channel(ses);
91
92 if (smb3_encryption_required(tcon))
93 flags |= CIFS_TRANSFORM_REQ;
94
95 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
96
97 /* We already have a handle so we can skip the open */
98 if (cfile)
99 goto after_open;
100
101 /* Open */
102 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
103 if (!utf16_path) {
104 rc = -ENOMEM;
105 goto finished;
106 }
107
108 vars->oparms = (struct cifs_open_parms) {
109 .tcon = tcon,
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 rc = SMB2_set_info_init(tcon, server,
238 &rqst[num_rqst], COMPOUND_FID,
239 COMPOUND_FID, current->tgid,
240 FILE_END_OF_FILE_INFORMATION,
241 SMB2_O_INFO_FILE, 0, data, size);
242 if (rc)
243 goto finished;
244 smb2_set_next_command(tcon, &rqst[num_rqst]);
245 smb2_set_related(&rqst[num_rqst++]);
246 trace_smb3_set_eof_enter(xid, ses->Suid, tcon->tid, full_path);
247 break;
248 case SMB2_OP_SET_INFO:
249 rqst[num_rqst].rq_iov = &vars->si_iov[0];
250 rqst[num_rqst].rq_nvec = 1;
251
252
253 size[0] = sizeof(FILE_BASIC_INFO);
254 data[0] = ptr;
255
256 if (cfile)
257 rc = SMB2_set_info_init(tcon, server,
258 &rqst[num_rqst],
259 cfile->fid.persistent_fid,
260 cfile->fid.volatile_fid, current->tgid,
261 FILE_BASIC_INFORMATION,
262 SMB2_O_INFO_FILE, 0, data, size);
263 else {
264 rc = SMB2_set_info_init(tcon, server,
265 &rqst[num_rqst],
266 COMPOUND_FID,
267 COMPOUND_FID, current->tgid,
268 FILE_BASIC_INFORMATION,
269 SMB2_O_INFO_FILE, 0, data, size);
270 if (!rc) {
271 smb2_set_next_command(tcon, &rqst[num_rqst]);
272 smb2_set_related(&rqst[num_rqst]);
273 }
274 }
275
276 if (rc)
277 goto finished;
278 num_rqst++;
279 trace_smb3_set_info_compound_enter(xid, ses->Suid, tcon->tid,
280 full_path);
281 break;
282 case SMB2_OP_RENAME:
283 rqst[num_rqst].rq_iov = &vars->si_iov[0];
284 rqst[num_rqst].rq_nvec = 2;
285
286 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
287
288 vars->rename_info.ReplaceIfExists = 1;
289 vars->rename_info.RootDirectory = 0;
290 vars->rename_info.FileNameLength = cpu_to_le32(len);
291
292 size[0] = sizeof(struct smb2_file_rename_info);
293 data[0] = &vars->rename_info;
294
295 size[1] = len + 2 /* null */;
296 data[1] = (__le16 *)ptr;
297
298 if (cfile)
299 rc = SMB2_set_info_init(tcon, server,
300 &rqst[num_rqst],
301 cfile->fid.persistent_fid,
302 cfile->fid.volatile_fid,
303 current->tgid, FILE_RENAME_INFORMATION,
304 SMB2_O_INFO_FILE, 0, data, size);
305 else {
306 rc = SMB2_set_info_init(tcon, server,
307 &rqst[num_rqst],
308 COMPOUND_FID, COMPOUND_FID,
309 current->tgid, FILE_RENAME_INFORMATION,
310 SMB2_O_INFO_FILE, 0, data, size);
311 if (!rc) {
312 smb2_set_next_command(tcon, &rqst[num_rqst]);
313 smb2_set_related(&rqst[num_rqst]);
314 }
315 }
316 if (rc)
317 goto finished;
318 num_rqst++;
319 trace_smb3_rename_enter(xid, ses->Suid, tcon->tid, full_path);
320 break;
321 case SMB2_OP_HARDLINK:
322 rqst[num_rqst].rq_iov = &vars->si_iov[0];
323 rqst[num_rqst].rq_nvec = 2;
324
325 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
326
327 vars->link_info.ReplaceIfExists = 0;
328 vars->link_info.RootDirectory = 0;
329 vars->link_info.FileNameLength = cpu_to_le32(len);
330
331 size[0] = sizeof(struct smb2_file_link_info);
332 data[0] = &vars->link_info;
333
334 size[1] = len + 2 /* null */;
335 data[1] = (__le16 *)ptr;
336
337 rc = SMB2_set_info_init(tcon, server,
338 &rqst[num_rqst], COMPOUND_FID,
339 COMPOUND_FID, current->tgid,
340 FILE_LINK_INFORMATION,
341 SMB2_O_INFO_FILE, 0, data, size);
342 if (rc)
343 goto finished;
344 smb2_set_next_command(tcon, &rqst[num_rqst]);
345 smb2_set_related(&rqst[num_rqst++]);
346 trace_smb3_hardlink_enter(xid, ses->Suid, tcon->tid, full_path);
347 break;
348 default:
349 cifs_dbg(VFS, "Invalid command\n");
350 rc = -EINVAL;
351 }
352 if (rc)
353 goto finished;
354
355 /* We already have a handle so we can skip the close */
356 if (cfile)
357 goto after_close;
358 /* Close */
359 flags |= CIFS_CP_CREATE_CLOSE_OP;
360 rqst[num_rqst].rq_iov = &vars->close_iov[0];
361 rqst[num_rqst].rq_nvec = 1;
362 rc = SMB2_close_init(tcon, server,
363 &rqst[num_rqst], COMPOUND_FID,
364 COMPOUND_FID, false);
365 smb2_set_related(&rqst[num_rqst]);
366 if (rc)
367 goto finished;
368 after_close:
369 num_rqst++;
370
371 if (cfile) {
372 rc = compound_send_recv(xid, ses, server,
373 flags, num_rqst - 2,
374 &rqst[1], &resp_buftype[1],
375 &rsp_iov[1]);
376 } else
377 rc = compound_send_recv(xid, ses, server,
378 flags, num_rqst,
379 rqst, resp_buftype,
380 rsp_iov);
381
382 finished:
383 if (cfile)
384 cifsFileInfo_put(cfile);
385
386 SMB2_open_free(&rqst[0]);
387 if (rc == -EREMCHG) {
388 pr_warn_once("server share %s deleted\n", tcon->tree_name);
389 tcon->need_reconnect = true;
390 }
391
392 switch (command) {
393 case SMB2_OP_QUERY_INFO:
394 idata = ptr;
395 if (rc == 0 && cfile && cfile->symlink_target) {
396 idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
397 if (!idata->symlink_target)
398 rc = -ENOMEM;
399 }
400 if (rc == 0) {
401 qi_rsp = (struct smb2_query_info_rsp *)
402 rsp_iov[1].iov_base;
403 rc = smb2_validate_and_copy_iov(
404 le16_to_cpu(qi_rsp->OutputBufferOffset),
405 le32_to_cpu(qi_rsp->OutputBufferLength),
406 &rsp_iov[1], sizeof(idata->fi), (char *)&idata->fi);
407 }
408 if (rqst[1].rq_iov)
409 SMB2_query_info_free(&rqst[1]);
410 if (rqst[2].rq_iov)
411 SMB2_close_free(&rqst[2]);
412 if (rc)
413 trace_smb3_query_info_compound_err(xid, ses->Suid,
414 tcon->tid, rc);
415 else
416 trace_smb3_query_info_compound_done(xid, ses->Suid,
417 tcon->tid);
418 break;
419 case SMB2_OP_POSIX_QUERY_INFO:
420 idata = ptr;
421 if (rc == 0 && cfile && cfile->symlink_target) {
422 idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
423 if (!idata->symlink_target)
424 rc = -ENOMEM;
425 }
426 if (rc == 0) {
427 qi_rsp = (struct smb2_query_info_rsp *)
428 rsp_iov[1].iov_base;
429 rc = smb2_validate_and_copy_iov(
430 le16_to_cpu(qi_rsp->OutputBufferOffset),
431 le32_to_cpu(qi_rsp->OutputBufferLength),
432 &rsp_iov[1], sizeof(idata->posix_fi) /* add SIDs */,
433 (char *)&idata->posix_fi);
434 }
435 if (rc == 0) {
436 unsigned int length = le32_to_cpu(qi_rsp->OutputBufferLength);
437
438 if (length > sizeof(idata->posix_fi)) {
439 char *base = (char *)rsp_iov[1].iov_base +
440 le16_to_cpu(qi_rsp->OutputBufferOffset) +
441 sizeof(idata->posix_fi);
442 *extbuflen = length - sizeof(idata->posix_fi);
443 *extbuf = kmemdup(base, *extbuflen, GFP_KERNEL);
444 if (!*extbuf)
445 rc = -ENOMEM;
446 } else {
447 rc = -EINVAL;
448 }
449 }
450 if (rqst[1].rq_iov)
451 SMB2_query_info_free(&rqst[1]);
452 if (rqst[2].rq_iov)
453 SMB2_close_free(&rqst[2]);
454 if (rc)
455 trace_smb3_posix_query_info_compound_err(xid, ses->Suid, tcon->tid, rc);
456 else
457 trace_smb3_posix_query_info_compound_done(xid, ses->Suid, tcon->tid);
458 break;
459 case SMB2_OP_DELETE:
460 if (rc)
461 trace_smb3_delete_err(xid, ses->Suid, tcon->tid, rc);
462 else
463 trace_smb3_delete_done(xid, ses->Suid, tcon->tid);
464 if (rqst[1].rq_iov)
465 SMB2_close_free(&rqst[1]);
466 break;
467 case SMB2_OP_MKDIR:
468 if (rc)
469 trace_smb3_mkdir_err(xid, ses->Suid, tcon->tid, rc);
470 else
471 trace_smb3_mkdir_done(xid, ses->Suid, tcon->tid);
472 if (rqst[1].rq_iov)
473 SMB2_close_free(&rqst[1]);
474 break;
475 case SMB2_OP_HARDLINK:
476 if (rc)
477 trace_smb3_hardlink_err(xid, ses->Suid, tcon->tid, rc);
478 else
479 trace_smb3_hardlink_done(xid, ses->Suid, tcon->tid);
480 free_set_inf_compound(rqst);
481 break;
482 case SMB2_OP_RENAME:
483 if (rc)
484 trace_smb3_rename_err(xid, ses->Suid, tcon->tid, rc);
485 else
486 trace_smb3_rename_done(xid, ses->Suid, tcon->tid);
487 free_set_inf_compound(rqst);
488 break;
489 case SMB2_OP_RMDIR:
490 if (rc)
491 trace_smb3_rmdir_err(xid, ses->Suid, tcon->tid, rc);
492 else
493 trace_smb3_rmdir_done(xid, ses->Suid, tcon->tid);
494 free_set_inf_compound(rqst);
495 break;
496 case SMB2_OP_SET_EOF:
497 if (rc)
498 trace_smb3_set_eof_err(xid, ses->Suid, tcon->tid, rc);
499 else
500 trace_smb3_set_eof_done(xid, ses->Suid, tcon->tid);
501 free_set_inf_compound(rqst);
502 break;
503 case SMB2_OP_SET_INFO:
504 if (rc)
505 trace_smb3_set_info_compound_err(xid, ses->Suid,
506 tcon->tid, rc);
507 else
508 trace_smb3_set_info_compound_done(xid, ses->Suid,
509 tcon->tid);
510 free_set_inf_compound(rqst);
511 break;
512 }
513
514 if (rc && err_iov && err_buftype) {
515 memcpy(err_iov, rsp_iov, 3 * sizeof(*err_iov));
516 memcpy(err_buftype, resp_buftype, 3 * sizeof(*err_buftype));
517 } else {
518 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
519 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
520 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
521 }
522 kfree(vars);
523 return rc;
524 }
525
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)526 int smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
527 struct cifs_sb_info *cifs_sb, const char *full_path,
528 struct cifs_open_info_data *data, bool *adjust_tz, bool *reparse)
529 {
530 __u32 create_options = 0;
531 struct cifsFileInfo *cfile;
532 struct cached_fid *cfid = NULL;
533 struct kvec err_iov[3] = {};
534 int err_buftype[3] = {};
535 bool islink;
536 int rc, rc2;
537
538 *adjust_tz = false;
539 *reparse = false;
540
541 if (strcmp(full_path, ""))
542 rc = -ENOENT;
543 else
544 rc = open_cached_dir(xid, tcon, full_path, cifs_sb, false, &cfid);
545 /* If it is a root and its handle is cached then use it */
546 if (!rc) {
547 if (cfid->file_all_info_is_valid) {
548 memcpy(&data->fi, &cfid->file_all_info, sizeof(data->fi));
549 } else {
550 rc = SMB2_query_info(xid, tcon, cfid->fid.persistent_fid,
551 cfid->fid.volatile_fid, &data->fi);
552 }
553 close_cached_dir(cfid);
554 return rc;
555 }
556
557 cifs_get_readable_path(tcon, full_path, &cfile);
558 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES, FILE_OPEN,
559 create_options, ACL_NO_MODE, data, SMB2_OP_QUERY_INFO, cfile,
560 NULL, NULL, err_iov, err_buftype);
561 if (rc) {
562 struct smb2_hdr *hdr = err_iov[0].iov_base;
563
564 if (unlikely(!hdr || err_buftype[0] == CIFS_NO_BUFFER))
565 goto out;
566 if (rc == -EOPNOTSUPP && hdr->Command == SMB2_CREATE &&
567 hdr->Status == STATUS_STOPPED_ON_SYMLINK) {
568 rc = smb2_parse_symlink_response(cifs_sb, err_iov,
569 &data->symlink_target);
570 if (rc)
571 goto out;
572
573 *reparse = true;
574 create_options |= OPEN_REPARSE_POINT;
575
576 /* Failed on a symbolic link - query a reparse point info */
577 cifs_get_readable_path(tcon, full_path, &cfile);
578 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
579 FILE_READ_ATTRIBUTES, FILE_OPEN,
580 create_options, ACL_NO_MODE, data,
581 SMB2_OP_QUERY_INFO, cfile, NULL, NULL,
582 NULL, NULL);
583 goto out;
584 } else if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) {
585 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb,
586 full_path, &islink);
587 if (rc2) {
588 rc = rc2;
589 goto out;
590 }
591 if (islink)
592 rc = -EREMOTE;
593 }
594 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb &&
595 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS))
596 rc = -EOPNOTSUPP;
597 }
598
599 out:
600 free_rsp_buf(err_buftype[0], err_iov[0].iov_base);
601 free_rsp_buf(err_buftype[1], err_iov[1].iov_base);
602 free_rsp_buf(err_buftype[2], err_iov[2].iov_base);
603 return rc;
604 }
605
606
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,struct cifs_sid * owner,struct cifs_sid * group,bool * adjust_tz,bool * reparse)607 int smb311_posix_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
608 struct cifs_sb_info *cifs_sb, const char *full_path,
609 struct cifs_open_info_data *data,
610 struct cifs_sid *owner,
611 struct cifs_sid *group,
612 bool *adjust_tz, bool *reparse)
613 {
614 int rc;
615 __u32 create_options = 0;
616 struct cifsFileInfo *cfile;
617 struct kvec err_iov[3] = {};
618 int err_buftype[3] = {};
619 __u8 *sidsbuf = NULL;
620 __u8 *sidsbuf_end = NULL;
621 size_t sidsbuflen = 0;
622 size_t owner_len, group_len;
623
624 *adjust_tz = false;
625 *reparse = false;
626
627 /*
628 * BB TODO: Add support for using the cached root handle.
629 * Create SMB2_query_posix_info worker function to do non-compounded query
630 * when we already have an open file handle for this. For now this is fast enough
631 * (always using the compounded version).
632 */
633
634 cifs_get_readable_path(tcon, full_path, &cfile);
635 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES, FILE_OPEN,
636 create_options, ACL_NO_MODE, data, SMB2_OP_POSIX_QUERY_INFO, cfile,
637 &sidsbuf, &sidsbuflen, err_iov, err_buftype);
638 if (rc == -EOPNOTSUPP) {
639 /* BB TODO: When support for special files added to Samba re-verify this path */
640 if (err_iov[0].iov_base && err_buftype[0] != CIFS_NO_BUFFER &&
641 ((struct smb2_hdr *)err_iov[0].iov_base)->Command == SMB2_CREATE &&
642 ((struct smb2_hdr *)err_iov[0].iov_base)->Status == STATUS_STOPPED_ON_SYMLINK) {
643 rc = smb2_parse_symlink_response(cifs_sb, err_iov, &data->symlink_target);
644 if (rc)
645 goto out;
646 }
647 *reparse = true;
648 create_options |= OPEN_REPARSE_POINT;
649
650 /* Failed on a symbolic link - query a reparse point info */
651 cifs_get_readable_path(tcon, full_path, &cfile);
652 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES,
653 FILE_OPEN, create_options, ACL_NO_MODE, data,
654 SMB2_OP_POSIX_QUERY_INFO, cfile,
655 &sidsbuf, &sidsbuflen, NULL, NULL);
656 }
657
658 if (rc == 0) {
659 sidsbuf_end = sidsbuf + sidsbuflen;
660
661 owner_len = posix_info_sid_size(sidsbuf, sidsbuf_end);
662 if (owner_len == -1) {
663 rc = -EINVAL;
664 goto out;
665 }
666 memcpy(owner, sidsbuf, owner_len);
667
668 group_len = posix_info_sid_size(
669 sidsbuf + owner_len, sidsbuf_end);
670 if (group_len == -1) {
671 rc = -EINVAL;
672 goto out;
673 }
674 memcpy(group, sidsbuf + owner_len, group_len);
675 }
676
677 out:
678 kfree(sidsbuf);
679 free_rsp_buf(err_buftype[0], err_iov[0].iov_base);
680 free_rsp_buf(err_buftype[1], err_iov[1].iov_base);
681 free_rsp_buf(err_buftype[2], err_iov[2].iov_base);
682 return rc;
683 }
684
685 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)686 smb2_mkdir(const unsigned int xid, struct inode *parent_inode, umode_t mode,
687 struct cifs_tcon *tcon, const char *name,
688 struct cifs_sb_info *cifs_sb)
689 {
690 return smb2_compound_op(xid, tcon, cifs_sb, name,
691 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
692 CREATE_NOT_FILE, mode, NULL, SMB2_OP_MKDIR,
693 NULL, NULL, NULL, NULL, NULL);
694 }
695
696 void
smb2_mkdir_setinfo(struct inode * inode,const char * name,struct cifs_sb_info * cifs_sb,struct cifs_tcon * tcon,const unsigned int xid)697 smb2_mkdir_setinfo(struct inode *inode, const char *name,
698 struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
699 const unsigned int xid)
700 {
701 FILE_BASIC_INFO data;
702 struct cifsInodeInfo *cifs_i;
703 struct cifsFileInfo *cfile;
704 u32 dosattrs;
705 int tmprc;
706
707 memset(&data, 0, sizeof(data));
708 cifs_i = CIFS_I(inode);
709 dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
710 data.Attributes = cpu_to_le32(dosattrs);
711 cifs_get_writable_path(tcon, name, FIND_WR_ANY, &cfile);
712 tmprc = smb2_compound_op(xid, tcon, cifs_sb, name,
713 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
714 CREATE_NOT_FILE, ACL_NO_MODE,
715 &data, SMB2_OP_SET_INFO, cfile, NULL, NULL, NULL, NULL);
716 if (tmprc == 0)
717 cifs_i->cifsAttrs = dosattrs;
718 }
719
720 int
smb2_rmdir(const unsigned int xid,struct cifs_tcon * tcon,const char * name,struct cifs_sb_info * cifs_sb)721 smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
722 struct cifs_sb_info *cifs_sb)
723 {
724 drop_cached_dir_by_name(xid, tcon, name, cifs_sb);
725 return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
726 CREATE_NOT_FILE, ACL_NO_MODE,
727 NULL, SMB2_OP_RMDIR, NULL, NULL, NULL, NULL, NULL);
728 }
729
730 int
smb2_unlink(const unsigned int xid,struct cifs_tcon * tcon,const char * name,struct cifs_sb_info * cifs_sb)731 smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
732 struct cifs_sb_info *cifs_sb)
733 {
734 return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
735 CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
736 ACL_NO_MODE, NULL, SMB2_OP_DELETE, NULL, NULL, NULL, NULL, NULL);
737 }
738
739 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)740 smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
741 const char *from_name, const char *to_name,
742 struct cifs_sb_info *cifs_sb, __u32 access, int command,
743 struct cifsFileInfo *cfile)
744 {
745 __le16 *smb2_to_name = NULL;
746 int rc;
747
748 smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
749 if (smb2_to_name == NULL) {
750 rc = -ENOMEM;
751 goto smb2_rename_path;
752 }
753 rc = smb2_compound_op(xid, tcon, cifs_sb, from_name, access,
754 FILE_OPEN, 0, ACL_NO_MODE, smb2_to_name,
755 command, cfile, NULL, NULL, NULL, NULL);
756 smb2_rename_path:
757 kfree(smb2_to_name);
758 return rc;
759 }
760
761 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)762 smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
763 const char *from_name, const char *to_name,
764 struct cifs_sb_info *cifs_sb)
765 {
766 struct cifsFileInfo *cfile;
767
768 drop_cached_dir_by_name(xid, tcon, from_name, cifs_sb);
769 cifs_get_writable_path(tcon, from_name, FIND_WR_WITH_DELETE, &cfile);
770
771 return smb2_set_path_attr(xid, tcon, from_name, to_name,
772 cifs_sb, DELETE, SMB2_OP_RENAME, cfile);
773 }
774
775 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)776 smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
777 const char *from_name, const char *to_name,
778 struct cifs_sb_info *cifs_sb)
779 {
780 return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
781 FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK,
782 NULL);
783 }
784
785 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)786 smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
787 const char *full_path, __u64 size,
788 struct cifs_sb_info *cifs_sb, bool set_alloc)
789 {
790 __le64 eof = cpu_to_le64(size);
791 struct cifsFileInfo *cfile;
792
793 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
794 return smb2_compound_op(xid, tcon, cifs_sb, full_path,
795 FILE_WRITE_DATA, FILE_OPEN, 0, ACL_NO_MODE,
796 &eof, SMB2_OP_SET_EOF, cfile, NULL, NULL, NULL, NULL);
797 }
798
799 int
smb2_set_file_info(struct inode * inode,const char * full_path,FILE_BASIC_INFO * buf,const unsigned int xid)800 smb2_set_file_info(struct inode *inode, const char *full_path,
801 FILE_BASIC_INFO *buf, const unsigned int xid)
802 {
803 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
804 struct tcon_link *tlink;
805 struct cifs_tcon *tcon;
806 struct cifsFileInfo *cfile;
807 int rc;
808
809 if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
810 (buf->LastWriteTime == 0) && (buf->ChangeTime == 0) &&
811 (buf->Attributes == 0))
812 return 0; /* would be a no op, no sense sending this */
813
814 tlink = cifs_sb_tlink(cifs_sb);
815 if (IS_ERR(tlink))
816 return PTR_ERR(tlink);
817 tcon = tlink_tcon(tlink);
818
819 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
820 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
821 FILE_WRITE_ATTRIBUTES, FILE_OPEN,
822 0, ACL_NO_MODE, buf, SMB2_OP_SET_INFO, cfile,
823 NULL, NULL, NULL, NULL);
824 cifs_put_tlink(tlink);
825 return rc;
826 }
827