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 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
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 */
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 struct wsl_query_ea {
89 __le32 next;
90 __u8 name_len;
91 __u8 name[SMB2_WSL_XATTR_NAME_LEN + 1];
92 } __packed;
93
94 #define NEXT_OFF cpu_to_le32(sizeof(struct wsl_query_ea))
95
96 static const struct wsl_query_ea wsl_query_eas[] = {
97 { .next = NEXT_OFF, .name_len = SMB2_WSL_XATTR_NAME_LEN, .name = SMB2_WSL_XATTR_UID, },
98 { .next = NEXT_OFF, .name_len = SMB2_WSL_XATTR_NAME_LEN, .name = SMB2_WSL_XATTR_GID, },
99 { .next = NEXT_OFF, .name_len = SMB2_WSL_XATTR_NAME_LEN, .name = SMB2_WSL_XATTR_MODE, },
100 { .next = 0, .name_len = SMB2_WSL_XATTR_NAME_LEN, .name = SMB2_WSL_XATTR_DEV, },
101 };
102
103 static int check_wsl_eas(struct kvec *rsp_iov)
104 {
105 struct smb2_file_full_ea_info *ea;
106 struct smb2_query_info_rsp *rsp = rsp_iov->iov_base;
107 unsigned long addr;
108 u32 outlen, next;
109 u16 vlen;
110 u8 nlen;
111 u8 *end;
112
113 outlen = le32_to_cpu(rsp->OutputBufferLength);
114 if (outlen < SMB2_WSL_MIN_QUERY_EA_RESP_SIZE ||
115 outlen > SMB2_WSL_MAX_QUERY_EA_RESP_SIZE)
116 return -EINVAL;
117
118 ea = (void *)((u8 *)rsp_iov->iov_base +
119 le16_to_cpu(rsp->OutputBufferOffset));
120 end = (u8 *)rsp_iov->iov_base + rsp_iov->iov_len;
121 for (;;) {
122 if ((u8 *)ea > end - sizeof(*ea))
123 return -EINVAL;
124
125 nlen = ea->ea_name_length;
126 vlen = le16_to_cpu(ea->ea_value_length);
127 if (nlen != SMB2_WSL_XATTR_NAME_LEN ||
128 (u8 *)ea + nlen + 1 + vlen > end)
129 return -EINVAL;
130
131 switch (vlen) {
132 case 4:
133 if (strncmp(ea->ea_data, SMB2_WSL_XATTR_UID, nlen) &&
134 strncmp(ea->ea_data, SMB2_WSL_XATTR_GID, nlen) &&
135 strncmp(ea->ea_data, SMB2_WSL_XATTR_MODE, nlen))
136 return -EINVAL;
137 break;
138 case 8:
139 if (strncmp(ea->ea_data, SMB2_WSL_XATTR_DEV, nlen))
140 return -EINVAL;
141 break;
142 case 0:
143 if (!strncmp(ea->ea_data, SMB2_WSL_XATTR_UID, nlen) ||
144 !strncmp(ea->ea_data, SMB2_WSL_XATTR_GID, nlen) ||
145 !strncmp(ea->ea_data, SMB2_WSL_XATTR_MODE, nlen) ||
146 !strncmp(ea->ea_data, SMB2_WSL_XATTR_DEV, nlen))
147 break;
148 fallthrough;
149 default:
150 return -EINVAL;
151 }
152
153 next = le32_to_cpu(ea->next_entry_offset);
154 if (!next)
155 break;
156 if (!IS_ALIGNED(next, 4) ||
157 check_add_overflow((unsigned long)ea, next, &addr))
158 return -EINVAL;
159 ea = (void *)addr;
160 }
161 return 0;
162 }
163
164 /*
165 * note: If cfile is passed, the reference to it is dropped here.
166 * So make sure that you do not reuse cfile after return from this func.
167 *
168 * If passing @out_iov and @out_buftype, ensure to make them both large enough
169 * (>= 3) to hold all compounded responses. Caller is also responsible for
170 * freeing them up with free_rsp_buf().
171 */
172 static int smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
173 struct cifs_sb_info *cifs_sb, const char *full_path,
174 struct cifs_open_parms *oparms, struct kvec *in_iov,
175 int *cmds, int num_cmds, struct cifsFileInfo *cfile,
176 struct kvec *out_iov, int *out_buftype, struct dentry *dentry)
177 {
178
179 struct reparse_data_buffer *rbuf;
180 struct smb2_compound_vars *vars = NULL;
181 struct kvec *rsp_iov, *iov;
182 struct smb_rqst *rqst;
183 int rc;
184 __le16 *utf16_path = NULL;
185 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
186 struct cifs_fid fid;
187 struct cifs_ses *ses = tcon->ses;
188 struct TCP_Server_Info *server;
189 int num_rqst = 0, i;
190 int resp_buftype[MAX_COMPOUND];
191 struct smb2_query_info_rsp *qi_rsp = NULL;
192 struct cifs_open_info_data *idata;
193 struct inode *inode = NULL;
194 int flags = 0;
195 __u8 delete_pending[8] = {1, 0, 0, 0, 0, 0, 0, 0};
196 unsigned int size[2];
197 void *data[2];
198 unsigned int len;
199 int retries = 0, cur_sleep = 1;
200
201 replay_again:
202 /* reinitialize for possible replay */
203 flags = 0;
204 oplock = SMB2_OPLOCK_LEVEL_NONE;
205 num_rqst = 0;
206 server = cifs_pick_channel(ses);
207
208 vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
209 if (vars == NULL)
210 return -ENOMEM;
211 rqst = &vars->rqst[0];
212 rsp_iov = &vars->rsp_iov[0];
213
214 if (smb3_encryption_required(tcon))
215 flags |= CIFS_TRANSFORM_REQ;
216
217 for (i = 0; i < ARRAY_SIZE(resp_buftype); i++)
218 resp_buftype[i] = CIFS_NO_BUFFER;
219
220 /* We already have a handle so we can skip the open */
221 if (cfile)
222 goto after_open;
223
224 /* Open */
225 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
226 if (!utf16_path) {
227 rc = -ENOMEM;
228 goto finished;
229 }
230
231 /* if there is an existing lease, reuse it */
232
233 /*
234 * note: files with hardlinks cause unexpected behaviour. As per MS-SMB2,
235 * lease keys are associated with the filepath. We are maintaining lease keys
236 * with the inode on the client. If the file has hardlinks, it is possible
237 * that the lease for a file be reused for an operation on its hardlink or
238 * vice versa.
239 * As a workaround, send request using an existing lease key and if the server
240 * returns STATUS_INVALID_PARAMETER, which maps to EINVAL, send the request
241 * again without the lease.
242 */
243 if (dentry) {
244 inode = d_inode(dentry);
245 if (CIFS_I(inode)->lease_granted && server->ops->get_lease_key) {
246 oplock = SMB2_OPLOCK_LEVEL_LEASE;
247 server->ops->get_lease_key(inode, &fid);
248 }
249 }
250
251 vars->oparms = *oparms;
252 vars->oparms.fid = &fid;
253
254 rqst[num_rqst].rq_iov = &vars->open_iov[0];
255 rqst[num_rqst].rq_nvec = SMB2_CREATE_IOV_SIZE;
256 rc = SMB2_open_init(tcon, server,
257 &rqst[num_rqst], &oplock, &vars->oparms,
258 utf16_path);
259 kfree(utf16_path);
260 if (rc)
261 goto finished;
262
263 smb2_set_next_command(tcon, &rqst[num_rqst]);
264 after_open:
265 num_rqst++;
266 rc = 0;
267
268 for (i = 0; i < num_cmds; i++) {
269 /* Operation */
270 switch (cmds[i]) {
271 case SMB2_OP_QUERY_INFO:
272 rqst[num_rqst].rq_iov = &vars->qi_iov;
273 rqst[num_rqst].rq_nvec = 1;
274
275 if (cfile) {
276 rc = SMB2_query_info_init(tcon, server,
277 &rqst[num_rqst],
278 cfile->fid.persistent_fid,
279 cfile->fid.volatile_fid,
280 FILE_ALL_INFORMATION,
281 SMB2_O_INFO_FILE, 0,
282 sizeof(struct smb2_file_all_info) +
283 PATH_MAX * 2, 0, NULL);
284 } else {
285 rc = SMB2_query_info_init(tcon, server,
286 &rqst[num_rqst],
287 COMPOUND_FID,
288 COMPOUND_FID,
289 FILE_ALL_INFORMATION,
290 SMB2_O_INFO_FILE, 0,
291 sizeof(struct smb2_file_all_info) +
292 PATH_MAX * 2, 0, NULL);
293 }
294 if (!rc && (!cfile || num_rqst > 1)) {
295 smb2_set_next_command(tcon, &rqst[num_rqst]);
296 smb2_set_related(&rqst[num_rqst]);
297 } else if (rc) {
298 goto finished;
299 }
300 num_rqst++;
301 trace_smb3_query_info_compound_enter(xid, ses->Suid,
302 tcon->tid, full_path);
303 break;
304 case SMB2_OP_POSIX_QUERY_INFO:
305 rqst[num_rqst].rq_iov = &vars->qi_iov;
306 rqst[num_rqst].rq_nvec = 1;
307
308 if (cfile) {
309 /* TBD: fix following to allow for longer SIDs */
310 rc = SMB2_query_info_init(tcon, server,
311 &rqst[num_rqst],
312 cfile->fid.persistent_fid,
313 cfile->fid.volatile_fid,
314 SMB_FIND_FILE_POSIX_INFO,
315 SMB2_O_INFO_FILE, 0,
316 sizeof(struct smb311_posix_qinfo *) +
317 (PATH_MAX * 2) +
318 (sizeof(struct cifs_sid) * 2), 0, NULL);
319 } else {
320 rc = SMB2_query_info_init(tcon, server,
321 &rqst[num_rqst],
322 COMPOUND_FID,
323 COMPOUND_FID,
324 SMB_FIND_FILE_POSIX_INFO,
325 SMB2_O_INFO_FILE, 0,
326 sizeof(struct smb311_posix_qinfo *) +
327 (PATH_MAX * 2) +
328 (sizeof(struct cifs_sid) * 2), 0, NULL);
329 }
330 if (!rc && (!cfile || num_rqst > 1)) {
331 smb2_set_next_command(tcon, &rqst[num_rqst]);
332 smb2_set_related(&rqst[num_rqst]);
333 } else if (rc) {
334 goto finished;
335 }
336 num_rqst++;
337 trace_smb3_posix_query_info_compound_enter(xid, ses->Suid,
338 tcon->tid, full_path);
339 break;
340 case SMB2_OP_DELETE:
341 trace_smb3_delete_enter(xid, ses->Suid, tcon->tid, full_path);
342 break;
343 case SMB2_OP_MKDIR:
344 /*
345 * Directories are created through parameters in the
346 * SMB2_open() call.
347 */
348 trace_smb3_mkdir_enter(xid, ses->Suid, tcon->tid, full_path);
349 break;
350 case SMB2_OP_RMDIR:
351 rqst[num_rqst].rq_iov = &vars->si_iov[0];
352 rqst[num_rqst].rq_nvec = 1;
353
354 size[0] = 1; /* sizeof __u8 See MS-FSCC section 2.4.11 */
355 data[0] = &delete_pending[0];
356
357 rc = SMB2_set_info_init(tcon, server,
358 &rqst[num_rqst], COMPOUND_FID,
359 COMPOUND_FID, current->tgid,
360 FILE_DISPOSITION_INFORMATION,
361 SMB2_O_INFO_FILE, 0, data, size);
362 if (rc)
363 goto finished;
364 smb2_set_next_command(tcon, &rqst[num_rqst]);
365 smb2_set_related(&rqst[num_rqst++]);
366 trace_smb3_rmdir_enter(xid, ses->Suid, tcon->tid, full_path);
367 break;
368 case SMB2_OP_SET_EOF:
369 rqst[num_rqst].rq_iov = &vars->si_iov[0];
370 rqst[num_rqst].rq_nvec = 1;
371
372 size[0] = in_iov[i].iov_len;
373 data[0] = in_iov[i].iov_base;
374
375 if (cfile) {
376 rc = SMB2_set_info_init(tcon, server,
377 &rqst[num_rqst],
378 cfile->fid.persistent_fid,
379 cfile->fid.volatile_fid,
380 current->tgid,
381 FILE_END_OF_FILE_INFORMATION,
382 SMB2_O_INFO_FILE, 0,
383 data, size);
384 } else {
385 rc = SMB2_set_info_init(tcon, server,
386 &rqst[num_rqst],
387 COMPOUND_FID,
388 COMPOUND_FID,
389 current->tgid,
390 FILE_END_OF_FILE_INFORMATION,
391 SMB2_O_INFO_FILE, 0,
392 data, size);
393 }
394 if (!rc && (!cfile || num_rqst > 1)) {
395 smb2_set_next_command(tcon, &rqst[num_rqst]);
396 smb2_set_related(&rqst[num_rqst]);
397 } else if (rc) {
398 goto finished;
399 }
400 num_rqst++;
401 trace_smb3_set_eof_enter(xid, ses->Suid, tcon->tid, full_path);
402 break;
403 case SMB2_OP_SET_INFO:
404 rqst[num_rqst].rq_iov = &vars->si_iov[0];
405 rqst[num_rqst].rq_nvec = 1;
406
407 size[0] = in_iov[i].iov_len;
408 data[0] = in_iov[i].iov_base;
409
410 if (cfile) {
411 rc = SMB2_set_info_init(tcon, server,
412 &rqst[num_rqst],
413 cfile->fid.persistent_fid,
414 cfile->fid.volatile_fid, current->tgid,
415 FILE_BASIC_INFORMATION,
416 SMB2_O_INFO_FILE, 0, data, size);
417 } else {
418 rc = SMB2_set_info_init(tcon, server,
419 &rqst[num_rqst],
420 COMPOUND_FID,
421 COMPOUND_FID, current->tgid,
422 FILE_BASIC_INFORMATION,
423 SMB2_O_INFO_FILE, 0, data, size);
424 }
425 if (!rc && (!cfile || num_rqst > 1)) {
426 smb2_set_next_command(tcon, &rqst[num_rqst]);
427 smb2_set_related(&rqst[num_rqst]);
428 } else if (rc) {
429 goto finished;
430 }
431 num_rqst++;
432 trace_smb3_set_info_compound_enter(xid, ses->Suid,
433 tcon->tid, full_path);
434 break;
435 case SMB2_OP_RENAME:
436 rqst[num_rqst].rq_iov = &vars->si_iov[0];
437 rqst[num_rqst].rq_nvec = 2;
438
439 len = in_iov[i].iov_len;
440
441 vars->rename_info.ReplaceIfExists = 1;
442 vars->rename_info.RootDirectory = 0;
443 vars->rename_info.FileNameLength = cpu_to_le32(len);
444
445 size[0] = sizeof(struct smb2_file_rename_info);
446 data[0] = &vars->rename_info;
447
448 size[1] = len + 2 /* null */;
449 data[1] = in_iov[i].iov_base;
450
451 if (cfile) {
452 rc = SMB2_set_info_init(tcon, server,
453 &rqst[num_rqst],
454 cfile->fid.persistent_fid,
455 cfile->fid.volatile_fid,
456 current->tgid, FILE_RENAME_INFORMATION,
457 SMB2_O_INFO_FILE, 0, data, size);
458 } else {
459 rc = SMB2_set_info_init(tcon, server,
460 &rqst[num_rqst],
461 COMPOUND_FID, COMPOUND_FID,
462 current->tgid, FILE_RENAME_INFORMATION,
463 SMB2_O_INFO_FILE, 0, data, size);
464 }
465 if (!rc && (!cfile || num_rqst > 1)) {
466 smb2_set_next_command(tcon, &rqst[num_rqst]);
467 smb2_set_related(&rqst[num_rqst]);
468 } else if (rc) {
469 goto finished;
470 }
471 num_rqst++;
472 trace_smb3_rename_enter(xid, ses->Suid, tcon->tid, full_path);
473 break;
474 case SMB2_OP_HARDLINK:
475 rqst[num_rqst].rq_iov = &vars->si_iov[0];
476 rqst[num_rqst].rq_nvec = 2;
477
478 len = in_iov[i].iov_len;
479
480 vars->link_info.ReplaceIfExists = 0;
481 vars->link_info.RootDirectory = 0;
482 vars->link_info.FileNameLength = cpu_to_le32(len);
483
484 size[0] = sizeof(struct smb2_file_link_info);
485 data[0] = &vars->link_info;
486
487 size[1] = len + 2 /* null */;
488 data[1] = in_iov[i].iov_base;
489
490 rc = SMB2_set_info_init(tcon, server,
491 &rqst[num_rqst], COMPOUND_FID,
492 COMPOUND_FID, current->tgid,
493 FILE_LINK_INFORMATION,
494 SMB2_O_INFO_FILE, 0, data, size);
495 if (rc)
496 goto finished;
497 smb2_set_next_command(tcon, &rqst[num_rqst]);
498 smb2_set_related(&rqst[num_rqst++]);
499 trace_smb3_hardlink_enter(xid, ses->Suid, tcon->tid, full_path);
500 break;
501 case SMB2_OP_SET_REPARSE:
502 rqst[num_rqst].rq_iov = vars->io_iov;
503 rqst[num_rqst].rq_nvec = ARRAY_SIZE(vars->io_iov);
504
505 if (cfile) {
506 rc = SMB2_ioctl_init(tcon, server, &rqst[num_rqst],
507 cfile->fid.persistent_fid,
508 cfile->fid.volatile_fid,
509 FSCTL_SET_REPARSE_POINT,
510 in_iov[i].iov_base,
511 in_iov[i].iov_len, 0);
512 } else {
513 rc = SMB2_ioctl_init(tcon, server, &rqst[num_rqst],
514 COMPOUND_FID, COMPOUND_FID,
515 FSCTL_SET_REPARSE_POINT,
516 in_iov[i].iov_base,
517 in_iov[i].iov_len, 0);
518 }
519 if (!rc && (!cfile || num_rqst > 1)) {
520 smb2_set_next_command(tcon, &rqst[num_rqst]);
521 smb2_set_related(&rqst[num_rqst]);
522 } else if (rc) {
523 goto finished;
524 }
525 num_rqst++;
526 trace_smb3_set_reparse_compound_enter(xid, ses->Suid,
527 tcon->tid, full_path);
528 break;
529 case SMB2_OP_GET_REPARSE:
530 rqst[num_rqst].rq_iov = vars->io_iov;
531 rqst[num_rqst].rq_nvec = ARRAY_SIZE(vars->io_iov);
532
533 if (cfile) {
534 rc = SMB2_ioctl_init(tcon, server, &rqst[num_rqst],
535 cfile->fid.persistent_fid,
536 cfile->fid.volatile_fid,
537 FSCTL_GET_REPARSE_POINT,
538 NULL, 0, CIFSMaxBufSize);
539 } else {
540 rc = SMB2_ioctl_init(tcon, server, &rqst[num_rqst],
541 COMPOUND_FID, COMPOUND_FID,
542 FSCTL_GET_REPARSE_POINT,
543 NULL, 0, CIFSMaxBufSize);
544 }
545 if (!rc && (!cfile || num_rqst > 1)) {
546 smb2_set_next_command(tcon, &rqst[num_rqst]);
547 smb2_set_related(&rqst[num_rqst]);
548 } else if (rc) {
549 goto finished;
550 }
551 num_rqst++;
552 trace_smb3_get_reparse_compound_enter(xid, ses->Suid,
553 tcon->tid, full_path);
554 break;
555 case SMB2_OP_QUERY_WSL_EA:
556 rqst[num_rqst].rq_iov = &vars->ea_iov;
557 rqst[num_rqst].rq_nvec = 1;
558
559 if (cfile) {
560 rc = SMB2_query_info_init(tcon, server,
561 &rqst[num_rqst],
562 cfile->fid.persistent_fid,
563 cfile->fid.volatile_fid,
564 FILE_FULL_EA_INFORMATION,
565 SMB2_O_INFO_FILE, 0,
566 SMB2_WSL_MAX_QUERY_EA_RESP_SIZE,
567 sizeof(wsl_query_eas),
568 (void *)wsl_query_eas);
569 } else {
570 rc = SMB2_query_info_init(tcon, server,
571 &rqst[num_rqst],
572 COMPOUND_FID,
573 COMPOUND_FID,
574 FILE_FULL_EA_INFORMATION,
575 SMB2_O_INFO_FILE, 0,
576 SMB2_WSL_MAX_QUERY_EA_RESP_SIZE,
577 sizeof(wsl_query_eas),
578 (void *)wsl_query_eas);
579 }
580 if (!rc && (!cfile || num_rqst > 1)) {
581 smb2_set_next_command(tcon, &rqst[num_rqst]);
582 smb2_set_related(&rqst[num_rqst]);
583 } else if (rc) {
584 goto finished;
585 }
586 num_rqst++;
587 break;
588 default:
589 cifs_dbg(VFS, "Invalid command\n");
590 rc = -EINVAL;
591 }
592 }
593 if (rc)
594 goto finished;
595
596 /* We already have a handle so we can skip the close */
597 if (cfile)
598 goto after_close;
599 /* Close */
600 flags |= CIFS_CP_CREATE_CLOSE_OP;
601 rqst[num_rqst].rq_iov = &vars->close_iov;
602 rqst[num_rqst].rq_nvec = 1;
603 rc = SMB2_close_init(tcon, server,
604 &rqst[num_rqst], COMPOUND_FID,
605 COMPOUND_FID, false);
606 smb2_set_related(&rqst[num_rqst]);
607 if (rc)
608 goto finished;
609 after_close:
610 num_rqst++;
611
612 if (cfile) {
613 if (retries)
614 for (i = 1; i < num_rqst - 2; i++)
615 smb2_set_replay(server, &rqst[i]);
616
617 rc = compound_send_recv(xid, ses, server,
618 flags, num_rqst - 2,
619 &rqst[1], &resp_buftype[1],
620 &rsp_iov[1]);
621 } else {
622 if (retries)
623 for (i = 0; i < num_rqst; i++)
624 smb2_set_replay(server, &rqst[i]);
625
626 rc = compound_send_recv(xid, ses, server,
627 flags, num_rqst,
628 rqst, resp_buftype,
629 rsp_iov);
630 }
631
632 finished:
633 num_rqst = 0;
634 SMB2_open_free(&rqst[num_rqst++]);
635 if (rc == -EREMCHG) {
636 pr_warn_once("server share %s deleted\n", tcon->tree_name);
637 tcon->need_reconnect = true;
638 }
639
640 for (i = 0; i < num_cmds; i++) {
641 switch (cmds[i]) {
642 case SMB2_OP_QUERY_INFO:
643 idata = in_iov[i].iov_base;
644 if (rc == 0 && cfile && cfile->symlink_target) {
645 idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
646 if (!idata->symlink_target)
647 rc = -ENOMEM;
648 }
649 if (rc == 0) {
650 qi_rsp = (struct smb2_query_info_rsp *)
651 rsp_iov[i + 1].iov_base;
652 rc = smb2_validate_and_copy_iov(
653 le16_to_cpu(qi_rsp->OutputBufferOffset),
654 le32_to_cpu(qi_rsp->OutputBufferLength),
655 &rsp_iov[i + 1], sizeof(idata->fi), (char *)&idata->fi);
656 }
657 SMB2_query_info_free(&rqst[num_rqst++]);
658 if (rc)
659 trace_smb3_query_info_compound_err(xid, ses->Suid,
660 tcon->tid, rc);
661 else
662 trace_smb3_query_info_compound_done(xid, ses->Suid,
663 tcon->tid);
664 break;
665 case SMB2_OP_POSIX_QUERY_INFO:
666 idata = in_iov[i].iov_base;
667 if (rc == 0 && cfile && cfile->symlink_target) {
668 idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
669 if (!idata->symlink_target)
670 rc = -ENOMEM;
671 }
672 if (rc == 0) {
673 qi_rsp = (struct smb2_query_info_rsp *)
674 rsp_iov[i + 1].iov_base;
675 rc = smb2_validate_and_copy_iov(
676 le16_to_cpu(qi_rsp->OutputBufferOffset),
677 le32_to_cpu(qi_rsp->OutputBufferLength),
678 &rsp_iov[i + 1], sizeof(idata->posix_fi) /* add SIDs */,
679 (char *)&idata->posix_fi);
680 }
681 if (rc == 0)
682 rc = parse_posix_sids(idata, &rsp_iov[i + 1]);
683
684 SMB2_query_info_free(&rqst[num_rqst++]);
685 if (rc)
686 trace_smb3_posix_query_info_compound_err(xid, ses->Suid,
687 tcon->tid, rc);
688 else
689 trace_smb3_posix_query_info_compound_done(xid, ses->Suid,
690 tcon->tid);
691 break;
692 case SMB2_OP_DELETE:
693 if (rc)
694 trace_smb3_delete_err(xid, ses->Suid, tcon->tid, rc);
695 else {
696 /*
697 * If dentry (hence, inode) is NULL, lease break is going to
698 * take care of degrading leases on handles for deleted files.
699 */
700 if (inode)
701 cifs_mark_open_handles_for_deleted_file(inode, full_path);
702 trace_smb3_delete_done(xid, ses->Suid, tcon->tid);
703 }
704 break;
705 case SMB2_OP_MKDIR:
706 if (rc)
707 trace_smb3_mkdir_err(xid, ses->Suid, tcon->tid, rc);
708 else
709 trace_smb3_mkdir_done(xid, ses->Suid, tcon->tid);
710 break;
711 case SMB2_OP_HARDLINK:
712 if (rc)
713 trace_smb3_hardlink_err(xid, ses->Suid, tcon->tid, rc);
714 else
715 trace_smb3_hardlink_done(xid, ses->Suid, tcon->tid);
716 SMB2_set_info_free(&rqst[num_rqst++]);
717 break;
718 case SMB2_OP_RENAME:
719 if (rc)
720 trace_smb3_rename_err(xid, ses->Suid, tcon->tid, rc);
721 else
722 trace_smb3_rename_done(xid, ses->Suid, tcon->tid);
723 SMB2_set_info_free(&rqst[num_rqst++]);
724 break;
725 case SMB2_OP_RMDIR:
726 if (rc)
727 trace_smb3_rmdir_err(xid, ses->Suid, tcon->tid, rc);
728 else
729 trace_smb3_rmdir_done(xid, ses->Suid, tcon->tid);
730 SMB2_set_info_free(&rqst[num_rqst++]);
731 break;
732 case SMB2_OP_SET_EOF:
733 if (rc)
734 trace_smb3_set_eof_err(xid, ses->Suid, tcon->tid, rc);
735 else
736 trace_smb3_set_eof_done(xid, ses->Suid, tcon->tid);
737 SMB2_set_info_free(&rqst[num_rqst++]);
738 break;
739 case SMB2_OP_SET_INFO:
740 if (rc)
741 trace_smb3_set_info_compound_err(xid, ses->Suid,
742 tcon->tid, rc);
743 else
744 trace_smb3_set_info_compound_done(xid, ses->Suid,
745 tcon->tid);
746 SMB2_set_info_free(&rqst[num_rqst++]);
747 break;
748 case SMB2_OP_SET_REPARSE:
749 if (rc) {
750 trace_smb3_set_reparse_compound_err(xid, ses->Suid,
751 tcon->tid, rc);
752 } else {
753 trace_smb3_set_reparse_compound_done(xid, ses->Suid,
754 tcon->tid);
755 }
756 SMB2_ioctl_free(&rqst[num_rqst++]);
757 break;
758 case SMB2_OP_GET_REPARSE:
759 if (!rc) {
760 iov = &rsp_iov[i + 1];
761 idata = in_iov[i].iov_base;
762 idata->reparse.io.iov = *iov;
763 idata->reparse.io.buftype = resp_buftype[i + 1];
764 rbuf = reparse_buf_ptr(iov);
765 if (IS_ERR(rbuf)) {
766 rc = PTR_ERR(rbuf);
767 trace_smb3_set_reparse_compound_err(xid, ses->Suid,
768 tcon->tid, rc);
769 } else {
770 idata->reparse.tag = le32_to_cpu(rbuf->ReparseTag);
771 trace_smb3_set_reparse_compound_done(xid, ses->Suid,
772 tcon->tid);
773 }
774 memset(iov, 0, sizeof(*iov));
775 resp_buftype[i + 1] = CIFS_NO_BUFFER;
776 } else {
777 trace_smb3_set_reparse_compound_err(xid, ses->Suid,
778 tcon->tid, rc);
779 }
780 SMB2_ioctl_free(&rqst[num_rqst++]);
781 break;
782 case SMB2_OP_QUERY_WSL_EA:
783 if (!rc) {
784 idata = in_iov[i].iov_base;
785 qi_rsp = rsp_iov[i + 1].iov_base;
786 data[0] = (u8 *)qi_rsp + le16_to_cpu(qi_rsp->OutputBufferOffset);
787 size[0] = le32_to_cpu(qi_rsp->OutputBufferLength);
788 rc = check_wsl_eas(&rsp_iov[i + 1]);
789 if (!rc) {
790 memcpy(idata->wsl.eas, data[0], size[0]);
791 idata->wsl.eas_len = size[0];
792 }
793 }
794 if (!rc) {
795 trace_smb3_query_wsl_ea_compound_done(xid, ses->Suid,
796 tcon->tid);
797 } else {
798 trace_smb3_query_wsl_ea_compound_err(xid, ses->Suid,
799 tcon->tid, rc);
800 }
801 SMB2_query_info_free(&rqst[num_rqst++]);
802 break;
803 }
804 }
805 SMB2_close_free(&rqst[num_rqst]);
806
807 num_cmds += 2;
808 if (out_iov && out_buftype) {
809 memcpy(out_iov, rsp_iov, num_cmds * sizeof(*out_iov));
810 memcpy(out_buftype, resp_buftype,
811 num_cmds * sizeof(*out_buftype));
812 } else {
813 for (i = 0; i < num_cmds; i++)
814 free_rsp_buf(resp_buftype[i], rsp_iov[i].iov_base);
815 }
816 num_cmds -= 2; /* correct num_cmds as there could be a retry */
817 kfree(vars);
818
819 if (is_replayable_error(rc) &&
820 smb2_should_replay(tcon, &retries, &cur_sleep))
821 goto replay_again;
822
823 if (cfile)
824 cifsFileInfo_put(cfile);
825
826 return rc;
827 }
828
829 static int parse_create_response(struct cifs_open_info_data *data,
830 struct cifs_sb_info *cifs_sb,
831 const struct kvec *iov)
832 {
833 struct smb2_create_rsp *rsp = iov->iov_base;
834 bool reparse_point = false;
835 u32 tag = 0;
836 int rc = 0;
837
838 switch (rsp->hdr.Status) {
839 case STATUS_IO_REPARSE_TAG_NOT_HANDLED:
840 reparse_point = true;
841 break;
842 case STATUS_STOPPED_ON_SYMLINK:
843 rc = smb2_parse_symlink_response(cifs_sb, iov,
844 &data->symlink_target);
845 if (rc)
846 return rc;
847 tag = IO_REPARSE_TAG_SYMLINK;
848 reparse_point = true;
849 break;
850 case STATUS_SUCCESS:
851 reparse_point = !!(rsp->Flags & SMB2_CREATE_FLAG_REPARSEPOINT);
852 break;
853 }
854 data->reparse_point = reparse_point;
855 data->reparse.tag = tag;
856 return rc;
857 }
858
859 int smb2_query_path_info(const unsigned int xid,
860 struct cifs_tcon *tcon,
861 struct cifs_sb_info *cifs_sb,
862 const char *full_path,
863 struct cifs_open_info_data *data)
864 {
865 struct cifs_open_parms oparms;
866 __u32 create_options = 0;
867 struct cifsFileInfo *cfile;
868 struct cached_fid *cfid = NULL;
869 struct smb2_hdr *hdr;
870 struct kvec in_iov[3], out_iov[3] = {};
871 int out_buftype[3] = {};
872 int cmds[3];
873 bool islink;
874 int i, num_cmds = 0;
875 int rc, rc2;
876
877 data->adjust_tz = false;
878 data->reparse_point = false;
879
880 /*
881 * BB TODO: Add support for using cached root handle in SMB3.1.1 POSIX.
882 * Create SMB2_query_posix_info worker function to do non-compounded
883 * query when we already have an open file handle for this. For now this
884 * is fast enough (always using the compounded version).
885 */
886 if (!tcon->posix_extensions) {
887 if (*full_path) {
888 rc = -ENOENT;
889 } else {
890 rc = open_cached_dir(xid, tcon, full_path,
891 cifs_sb, false, &cfid);
892 }
893 /* If it is a root and its handle is cached then use it */
894 if (!rc) {
895 if (cfid->file_all_info_is_valid) {
896 memcpy(&data->fi, &cfid->file_all_info,
897 sizeof(data->fi));
898 } else {
899 rc = SMB2_query_info(xid, tcon,
900 cfid->fid.persistent_fid,
901 cfid->fid.volatile_fid,
902 &data->fi);
903 }
904 close_cached_dir(cfid);
905 return rc;
906 }
907 cmds[num_cmds++] = SMB2_OP_QUERY_INFO;
908 } else {
909 cmds[num_cmds++] = SMB2_OP_POSIX_QUERY_INFO;
910 }
911
912 in_iov[0].iov_base = data;
913 in_iov[0].iov_len = sizeof(*data);
914 in_iov[1] = in_iov[0];
915 in_iov[2] = in_iov[0];
916
917 cifs_get_readable_path(tcon, full_path, &cfile);
918 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, FILE_READ_ATTRIBUTES,
919 FILE_OPEN, create_options, ACL_NO_MODE);
920 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
921 &oparms, in_iov, cmds, num_cmds,
922 cfile, out_iov, out_buftype, NULL);
923 hdr = out_iov[0].iov_base;
924 /*
925 * If first iov is unset, then SMB session was dropped or we've got a
926 * cached open file (@cfile).
927 */
928 if (!hdr || out_buftype[0] == CIFS_NO_BUFFER)
929 goto out;
930
931 switch (rc) {
932 case 0:
933 rc = parse_create_response(data, cifs_sb, &out_iov[0]);
934 break;
935 case -EOPNOTSUPP:
936 /*
937 * BB TODO: When support for special files added to Samba
938 * re-verify this path.
939 */
940 rc = parse_create_response(data, cifs_sb, &out_iov[0]);
941 if (rc || !data->reparse_point)
942 goto out;
943
944 cmds[num_cmds++] = SMB2_OP_QUERY_WSL_EA;
945 /*
946 * Skip SMB2_OP_GET_REPARSE if symlink already parsed in create
947 * response.
948 */
949 if (data->reparse.tag != IO_REPARSE_TAG_SYMLINK)
950 cmds[num_cmds++] = SMB2_OP_GET_REPARSE;
951
952 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path,
953 FILE_READ_ATTRIBUTES |
954 FILE_READ_EA | SYNCHRONIZE,
955 FILE_OPEN, create_options |
956 OPEN_REPARSE_POINT, ACL_NO_MODE);
957 cifs_get_readable_path(tcon, full_path, &cfile);
958 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
959 &oparms, in_iov, cmds, num_cmds,
960 cfile, NULL, NULL, NULL);
961 break;
962 case -EREMOTE:
963 break;
964 default:
965 if (hdr->Status != STATUS_OBJECT_NAME_INVALID)
966 break;
967 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb,
968 full_path, &islink);
969 if (rc2) {
970 rc = rc2;
971 goto out;
972 }
973 if (islink)
974 rc = -EREMOTE;
975 }
976
977 out:
978 for (i = 0; i < ARRAY_SIZE(out_buftype); i++)
979 free_rsp_buf(out_buftype[i], out_iov[i].iov_base);
980 return rc;
981 }
982
983 int
984 smb2_mkdir(const unsigned int xid, struct inode *parent_inode, umode_t mode,
985 struct cifs_tcon *tcon, const char *name,
986 struct cifs_sb_info *cifs_sb)
987 {
988 struct cifs_open_parms oparms;
989
990 oparms = CIFS_OPARMS(cifs_sb, tcon, name, FILE_WRITE_ATTRIBUTES,
991 FILE_CREATE, CREATE_NOT_FILE, mode);
992 return smb2_compound_op(xid, tcon, cifs_sb,
993 name, &oparms, NULL,
994 &(int){SMB2_OP_MKDIR}, 1,
995 NULL, NULL, NULL, NULL);
996 }
997
998 void
999 smb2_mkdir_setinfo(struct inode *inode, const char *name,
1000 struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
1001 const unsigned int xid)
1002 {
1003 struct cifs_open_parms oparms;
1004 FILE_BASIC_INFO data = {};
1005 struct cifsInodeInfo *cifs_i;
1006 struct cifsFileInfo *cfile;
1007 struct kvec in_iov;
1008 u32 dosattrs;
1009 int tmprc;
1010
1011 in_iov.iov_base = &data;
1012 in_iov.iov_len = sizeof(data);
1013 cifs_i = CIFS_I(inode);
1014 dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
1015 data.Attributes = cpu_to_le32(dosattrs);
1016 cifs_get_writable_path(tcon, name, FIND_WR_ANY, &cfile);
1017 oparms = CIFS_OPARMS(cifs_sb, tcon, name, FILE_WRITE_ATTRIBUTES,
1018 FILE_CREATE, CREATE_NOT_FILE, ACL_NO_MODE);
1019 tmprc = smb2_compound_op(xid, tcon, cifs_sb, name,
1020 &oparms, &in_iov,
1021 &(int){SMB2_OP_SET_INFO}, 1,
1022 cfile, NULL, NULL, NULL);
1023 if (tmprc == 0)
1024 cifs_i->cifsAttrs = dosattrs;
1025 }
1026
1027 int
1028 smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
1029 struct cifs_sb_info *cifs_sb)
1030 {
1031 struct cifs_open_parms oparms;
1032
1033 drop_cached_dir_by_name(xid, tcon, name, cifs_sb);
1034 oparms = CIFS_OPARMS(cifs_sb, tcon, name, DELETE,
1035 FILE_OPEN, CREATE_NOT_FILE, ACL_NO_MODE);
1036 return smb2_compound_op(xid, tcon, cifs_sb,
1037 name, &oparms, NULL,
1038 &(int){SMB2_OP_RMDIR}, 1,
1039 NULL, NULL, NULL, NULL);
1040 }
1041
1042 int
1043 smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
1044 struct cifs_sb_info *cifs_sb, struct dentry *dentry)
1045 {
1046 struct cifs_open_parms oparms;
1047
1048 oparms = CIFS_OPARMS(cifs_sb, tcon, name,
1049 DELETE, FILE_OPEN,
1050 CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
1051 ACL_NO_MODE);
1052 int rc = smb2_compound_op(xid, tcon, cifs_sb, name, &oparms,
1053 NULL, &(int){SMB2_OP_DELETE}, 1,
1054 NULL, NULL, NULL, dentry);
1055 if (rc == -EINVAL) {
1056 cifs_dbg(FYI, "invalid lease key, resending request without lease");
1057 rc = smb2_compound_op(xid, tcon, cifs_sb, name, &oparms,
1058 NULL, &(int){SMB2_OP_DELETE}, 1,
1059 NULL, NULL, NULL, NULL);
1060 }
1061 return rc;
1062 }
1063
1064 static int smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
1065 const char *from_name, const char *to_name,
1066 struct cifs_sb_info *cifs_sb,
1067 __u32 create_options, __u32 access,
1068 int command, struct cifsFileInfo *cfile,
1069 struct dentry *dentry)
1070 {
1071 struct cifs_open_parms oparms;
1072 struct kvec in_iov;
1073 __le16 *smb2_to_name = NULL;
1074 int rc;
1075
1076 smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
1077 if (smb2_to_name == NULL) {
1078 rc = -ENOMEM;
1079 goto smb2_rename_path;
1080 }
1081 in_iov.iov_base = smb2_to_name;
1082 in_iov.iov_len = 2 * UniStrnlen((wchar_t *)smb2_to_name, PATH_MAX);
1083 oparms = CIFS_OPARMS(cifs_sb, tcon, from_name, access, FILE_OPEN,
1084 create_options, ACL_NO_MODE);
1085 rc = smb2_compound_op(xid, tcon, cifs_sb, from_name,
1086 &oparms, &in_iov, &command, 1,
1087 cfile, NULL, NULL, dentry);
1088 smb2_rename_path:
1089 kfree(smb2_to_name);
1090 return rc;
1091 }
1092
1093 int smb2_rename_path(const unsigned int xid,
1094 struct cifs_tcon *tcon,
1095 struct dentry *source_dentry,
1096 const char *from_name, const char *to_name,
1097 struct cifs_sb_info *cifs_sb)
1098 {
1099 struct cifsFileInfo *cfile;
1100 __u32 co = file_create_options(source_dentry);
1101
1102 drop_cached_dir_by_name(xid, tcon, from_name, cifs_sb);
1103 cifs_get_writable_path(tcon, from_name, FIND_WR_WITH_DELETE, &cfile);
1104
1105 int rc = smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
1106 co, DELETE, SMB2_OP_RENAME, cfile, source_dentry);
1107 if (rc == -EINVAL) {
1108 cifs_dbg(FYI, "invalid lease key, resending request without lease");
1109 cifs_get_writable_path(tcon, from_name,
1110 FIND_WR_WITH_DELETE, &cfile);
1111 rc = smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
1112 co, DELETE, SMB2_OP_RENAME, cfile, NULL);
1113 }
1114 return rc;
1115 }
1116
1117 int smb2_create_hardlink(const unsigned int xid,
1118 struct cifs_tcon *tcon,
1119 struct dentry *source_dentry,
1120 const char *from_name, const char *to_name,
1121 struct cifs_sb_info *cifs_sb)
1122 {
1123 __u32 co = file_create_options(source_dentry);
1124
1125 return smb2_set_path_attr(xid, tcon, from_name, to_name,
1126 cifs_sb, co, FILE_READ_ATTRIBUTES,
1127 SMB2_OP_HARDLINK, NULL, NULL);
1128 }
1129
1130 int
1131 smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
1132 const char *full_path, __u64 size,
1133 struct cifs_sb_info *cifs_sb, bool set_alloc,
1134 struct dentry *dentry)
1135 {
1136 struct cifs_open_parms oparms;
1137 struct cifsFileInfo *cfile;
1138 struct kvec in_iov;
1139 __le64 eof = cpu_to_le64(size);
1140 int rc;
1141
1142 in_iov.iov_base = &eof;
1143 in_iov.iov_len = sizeof(eof);
1144 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
1145
1146 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, FILE_WRITE_DATA,
1147 FILE_OPEN, 0, ACL_NO_MODE);
1148 rc = smb2_compound_op(xid, tcon, cifs_sb,
1149 full_path, &oparms, &in_iov,
1150 &(int){SMB2_OP_SET_EOF}, 1,
1151 cfile, NULL, NULL, dentry);
1152 if (rc == -EINVAL) {
1153 cifs_dbg(FYI, "invalid lease key, resending request without lease");
1154 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
1155 rc = smb2_compound_op(xid, tcon, cifs_sb,
1156 full_path, &oparms, &in_iov,
1157 &(int){SMB2_OP_SET_EOF}, 1,
1158 cfile, NULL, NULL, NULL);
1159 }
1160 return rc;
1161 }
1162
1163 int
1164 smb2_set_file_info(struct inode *inode, const char *full_path,
1165 FILE_BASIC_INFO *buf, const unsigned int xid)
1166 {
1167 struct cifs_open_parms oparms;
1168 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1169 struct tcon_link *tlink;
1170 struct cifs_tcon *tcon;
1171 struct cifsFileInfo *cfile;
1172 struct kvec in_iov = { .iov_base = buf, .iov_len = sizeof(*buf), };
1173 int rc;
1174
1175 if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
1176 (buf->LastWriteTime == 0) && (buf->ChangeTime == 0) &&
1177 (buf->Attributes == 0))
1178 return 0; /* would be a no op, no sense sending this */
1179
1180 tlink = cifs_sb_tlink(cifs_sb);
1181 if (IS_ERR(tlink))
1182 return PTR_ERR(tlink);
1183 tcon = tlink_tcon(tlink);
1184
1185 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
1186 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, FILE_WRITE_ATTRIBUTES,
1187 FILE_OPEN, 0, ACL_NO_MODE);
1188 rc = smb2_compound_op(xid, tcon, cifs_sb,
1189 full_path, &oparms, &in_iov,
1190 &(int){SMB2_OP_SET_INFO}, 1,
1191 cfile, NULL, NULL, NULL);
1192 cifs_put_tlink(tlink);
1193 return rc;
1194 }
1195
1196 struct inode *smb2_get_reparse_inode(struct cifs_open_info_data *data,
1197 struct super_block *sb,
1198 const unsigned int xid,
1199 struct cifs_tcon *tcon,
1200 const char *full_path,
1201 struct kvec *reparse_iov,
1202 struct kvec *xattr_iov)
1203 {
1204 struct cifs_open_parms oparms;
1205 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1206 struct cifsFileInfo *cfile;
1207 struct inode *new = NULL;
1208 int out_buftype[4] = {};
1209 struct kvec out_iov[4] = {};
1210 struct kvec in_iov[2];
1211 int cmds[2];
1212 int rc;
1213 int i;
1214
1215 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path,
1216 SYNCHRONIZE | DELETE |
1217 FILE_READ_ATTRIBUTES |
1218 FILE_WRITE_ATTRIBUTES,
1219 FILE_CREATE,
1220 CREATE_NOT_DIR | OPEN_REPARSE_POINT,
1221 ACL_NO_MODE);
1222 if (xattr_iov)
1223 oparms.ea_cctx = xattr_iov;
1224
1225 cmds[0] = SMB2_OP_SET_REPARSE;
1226 in_iov[0] = *reparse_iov;
1227 in_iov[1].iov_base = data;
1228 in_iov[1].iov_len = sizeof(*data);
1229
1230 if (tcon->posix_extensions) {
1231 cmds[1] = SMB2_OP_POSIX_QUERY_INFO;
1232 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
1233 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, &oparms,
1234 in_iov, cmds, 2, cfile, out_iov, out_buftype, NULL);
1235 if (!rc) {
1236 rc = smb311_posix_get_inode_info(&new, full_path,
1237 data, sb, xid);
1238 }
1239 } else {
1240 cmds[1] = SMB2_OP_QUERY_INFO;
1241 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
1242 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, &oparms,
1243 in_iov, cmds, 2, cfile, out_iov, out_buftype, NULL);
1244 if (!rc) {
1245 rc = cifs_get_inode_info(&new, full_path,
1246 data, sb, xid, NULL);
1247 }
1248 }
1249
1250
1251 /*
1252 * If CREATE was successful but SMB2_OP_SET_REPARSE failed then
1253 * remove the intermediate object created by CREATE. Otherwise
1254 * empty object stay on the server when reparse call failed.
1255 */
1256 if (rc &&
1257 out_iov[0].iov_base != NULL && out_buftype[0] != CIFS_NO_BUFFER &&
1258 ((struct smb2_hdr *)out_iov[0].iov_base)->Status == STATUS_SUCCESS &&
1259 (out_iov[1].iov_base == NULL || out_buftype[1] == CIFS_NO_BUFFER ||
1260 ((struct smb2_hdr *)out_iov[1].iov_base)->Status != STATUS_SUCCESS))
1261 smb2_unlink(xid, tcon, full_path, cifs_sb, NULL);
1262
1263 for (i = 0; i < ARRAY_SIZE(out_buftype); i++)
1264 free_rsp_buf(out_buftype[i], out_iov[i].iov_base);
1265
1266 return rc ? ERR_PTR(rc) : new;
1267 }
1268
1269 int smb2_query_reparse_point(const unsigned int xid,
1270 struct cifs_tcon *tcon,
1271 struct cifs_sb_info *cifs_sb,
1272 const char *full_path,
1273 u32 *tag, struct kvec *rsp,
1274 int *rsp_buftype)
1275 {
1276 struct cifs_open_parms oparms;
1277 struct cifs_open_info_data data = {};
1278 struct cifsFileInfo *cfile;
1279 struct kvec in_iov = { .iov_base = &data, .iov_len = sizeof(data), };
1280 int rc;
1281
1282 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1283
1284 cifs_get_readable_path(tcon, full_path, &cfile);
1285 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path,
1286 FILE_READ_ATTRIBUTES | FILE_READ_EA | SYNCHRONIZE,
1287 FILE_OPEN, OPEN_REPARSE_POINT, ACL_NO_MODE);
1288 rc = smb2_compound_op(xid, tcon, cifs_sb,
1289 full_path, &oparms, &in_iov,
1290 &(int){SMB2_OP_GET_REPARSE}, 1,
1291 cfile, NULL, NULL, NULL);
1292 if (rc)
1293 goto out;
1294
1295 *tag = data.reparse.tag;
1296 *rsp = data.reparse.io.iov;
1297 *rsp_buftype = data.reparse.io.buftype;
1298 memset(&data.reparse.io.iov, 0, sizeof(data.reparse.io.iov));
1299 data.reparse.io.buftype = CIFS_NO_BUFFER;
1300 out:
1301 cifs_free_open_info(&data);
1302 return rc;
1303 }
1304
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