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 "../common/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 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
check_wsl_eas(struct kvec * rsp_iov)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 */
smb2_compound_op(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,const char * full_path,struct cifs_open_parms * oparms,struct kvec * in_iov,int * cmds,int num_cmds,struct cifsFileInfo * cfile,struct kvec * out_iov,int * out_buftype,struct dentry * dentry)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 smb2_create_rsp *create_rsp = NULL;
180 struct smb2_query_info_rsp *qi_rsp = NULL;
181 struct smb2_compound_vars *vars = NULL;
182 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
183 struct cifs_open_info_data *idata;
184 struct cifs_ses *ses = tcon->ses;
185 struct reparse_data_buffer *rbuf;
186 struct TCP_Server_Info *server;
187 int resp_buftype[MAX_COMPOUND];
188 int retries = 0, cur_sleep = 1;
189 __u8 delete_pending[8] = {1,};
190 struct kvec *rsp_iov, *iov;
191 struct inode *inode = NULL;
192 __le16 *utf16_path = NULL;
193 struct smb_rqst *rqst;
194 unsigned int size[2];
195 struct cifs_fid fid;
196 int num_rqst = 0, i;
197 unsigned int len;
198 int tmp_rc, rc;
199 int flags = 0;
200 void *data[2];
201
202 replay_again:
203 /* reinitialize for possible replay */
204 flags = 0;
205 oplock = SMB2_OPLOCK_LEVEL_NONE;
206 num_rqst = 0;
207 server = cifs_pick_channel(ses);
208
209 vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
210 if (vars == NULL)
211 return -ENOMEM;
212 rqst = &vars->rqst[0];
213 rsp_iov = &vars->rsp_iov[0];
214
215 if (smb3_encryption_required(tcon))
216 flags |= CIFS_TRANSFORM_REQ;
217
218 for (i = 0; i < ARRAY_SIZE(resp_buftype); i++)
219 resp_buftype[i] = CIFS_NO_BUFFER;
220
221 /* We already have a handle so we can skip the open */
222 if (cfile)
223 goto after_open;
224
225 /* Open */
226 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
227 if (!utf16_path) {
228 rc = -ENOMEM;
229 goto finished;
230 }
231
232 /* if there is an existing lease, reuse it */
233
234 /*
235 * note: files with hardlinks cause unexpected behaviour. As per MS-SMB2,
236 * lease keys are associated with the filepath. We are maintaining lease keys
237 * with the inode on the client. If the file has hardlinks, it is possible
238 * that the lease for a file be reused for an operation on its hardlink or
239 * vice versa.
240 * As a workaround, send request using an existing lease key and if the server
241 * returns STATUS_INVALID_PARAMETER, which maps to EINVAL, send the request
242 * again without the lease.
243 */
244 if (dentry) {
245 inode = d_inode(dentry);
246 if (CIFS_I(inode)->lease_granted && server->ops->get_lease_key) {
247 oplock = SMB2_OPLOCK_LEVEL_LEASE;
248 server->ops->get_lease_key(inode, &fid);
249 }
250 }
251
252 vars->oparms = *oparms;
253 vars->oparms.fid = &fid;
254
255 rqst[num_rqst].rq_iov = &vars->open_iov[0];
256 rqst[num_rqst].rq_nvec = SMB2_CREATE_IOV_SIZE;
257 rc = SMB2_open_init(tcon, server,
258 &rqst[num_rqst], &oplock, &vars->oparms,
259 utf16_path);
260 kfree(utf16_path);
261 if (rc)
262 goto finished;
263
264 smb2_set_next_command(tcon, &rqst[num_rqst]);
265 after_open:
266 num_rqst++;
267 rc = 0;
268
269 i = 0;
270
271 /* Skip the leading explicit OPEN operation */
272 if (num_cmds > 0 && cmds[0] == SMB2_OP_OPEN_QUERY)
273 i++;
274
275 for (; i < num_cmds; i++) {
276 /* Operation */
277 switch (cmds[i]) {
278 case SMB2_OP_QUERY_INFO:
279 rqst[num_rqst].rq_iov = &vars->qi_iov;
280 rqst[num_rqst].rq_nvec = 1;
281
282 if (cfile) {
283 rc = SMB2_query_info_init(tcon, server,
284 &rqst[num_rqst],
285 cfile->fid.persistent_fid,
286 cfile->fid.volatile_fid,
287 FILE_ALL_INFORMATION,
288 SMB2_O_INFO_FILE, 0,
289 sizeof(struct smb2_file_all_info) +
290 PATH_MAX * 2, 0, NULL);
291 } else {
292 rc = SMB2_query_info_init(tcon, server,
293 &rqst[num_rqst],
294 COMPOUND_FID,
295 COMPOUND_FID,
296 FILE_ALL_INFORMATION,
297 SMB2_O_INFO_FILE, 0,
298 sizeof(struct smb2_file_all_info) +
299 PATH_MAX * 2, 0, NULL);
300 }
301 if (!rc && (!cfile || num_rqst > 1)) {
302 smb2_set_next_command(tcon, &rqst[num_rqst]);
303 smb2_set_related(&rqst[num_rqst]);
304 } else if (rc) {
305 goto finished;
306 }
307 num_rqst++;
308 trace_smb3_query_info_compound_enter(xid, tcon->tid,
309 ses->Suid, full_path);
310 break;
311 case SMB2_OP_POSIX_QUERY_INFO:
312 rqst[num_rqst].rq_iov = &vars->qi_iov;
313 rqst[num_rqst].rq_nvec = 1;
314
315 if (cfile) {
316 /* TBD: fix following to allow for longer SIDs */
317 rc = SMB2_query_info_init(tcon, server,
318 &rqst[num_rqst],
319 cfile->fid.persistent_fid,
320 cfile->fid.volatile_fid,
321 SMB_FIND_FILE_POSIX_INFO,
322 SMB2_O_INFO_FILE, 0,
323 sizeof(struct smb311_posix_qinfo *) +
324 (PATH_MAX * 2) +
325 (sizeof(struct smb_sid) * 2), 0, NULL);
326 } else {
327 rc = SMB2_query_info_init(tcon, server,
328 &rqst[num_rqst],
329 COMPOUND_FID,
330 COMPOUND_FID,
331 SMB_FIND_FILE_POSIX_INFO,
332 SMB2_O_INFO_FILE, 0,
333 sizeof(struct smb311_posix_qinfo *) +
334 (PATH_MAX * 2) +
335 (sizeof(struct smb_sid) * 2), 0, NULL);
336 }
337 if (!rc && (!cfile || num_rqst > 1)) {
338 smb2_set_next_command(tcon, &rqst[num_rqst]);
339 smb2_set_related(&rqst[num_rqst]);
340 } else if (rc) {
341 goto finished;
342 }
343 num_rqst++;
344 trace_smb3_posix_query_info_compound_enter(xid, tcon->tid,
345 ses->Suid, full_path);
346 break;
347 case SMB2_OP_DELETE:
348 trace_smb3_delete_enter(xid, tcon->tid, ses->Suid, full_path);
349 break;
350 case SMB2_OP_MKDIR:
351 /*
352 * Directories are created through parameters in the
353 * SMB2_open() call.
354 */
355 trace_smb3_mkdir_enter(xid, tcon->tid, ses->Suid, full_path);
356 break;
357 case SMB2_OP_RMDIR:
358 rqst[num_rqst].rq_iov = &vars->si_iov[0];
359 rqst[num_rqst].rq_nvec = 1;
360
361 size[0] = 1; /* sizeof __u8 See MS-FSCC section 2.4.11 */
362 data[0] = &delete_pending[0];
363
364 rc = SMB2_set_info_init(tcon, server,
365 &rqst[num_rqst], COMPOUND_FID,
366 COMPOUND_FID, current->tgid,
367 FILE_DISPOSITION_INFORMATION,
368 SMB2_O_INFO_FILE, 0, data, size);
369 if (rc)
370 goto finished;
371 smb2_set_next_command(tcon, &rqst[num_rqst]);
372 smb2_set_related(&rqst[num_rqst++]);
373 trace_smb3_rmdir_enter(xid, tcon->tid, ses->Suid, full_path);
374 break;
375 case SMB2_OP_SET_EOF:
376 rqst[num_rqst].rq_iov = &vars->si_iov[0];
377 rqst[num_rqst].rq_nvec = 1;
378
379 size[0] = in_iov[i].iov_len;
380 data[0] = in_iov[i].iov_base;
381
382 if (cfile) {
383 rc = SMB2_set_info_init(tcon, server,
384 &rqst[num_rqst],
385 cfile->fid.persistent_fid,
386 cfile->fid.volatile_fid,
387 current->tgid,
388 FILE_END_OF_FILE_INFORMATION,
389 SMB2_O_INFO_FILE, 0,
390 data, size);
391 } else {
392 rc = SMB2_set_info_init(tcon, server,
393 &rqst[num_rqst],
394 COMPOUND_FID,
395 COMPOUND_FID,
396 current->tgid,
397 FILE_END_OF_FILE_INFORMATION,
398 SMB2_O_INFO_FILE, 0,
399 data, size);
400 }
401 if (!rc && (!cfile || num_rqst > 1)) {
402 smb2_set_next_command(tcon, &rqst[num_rqst]);
403 smb2_set_related(&rqst[num_rqst]);
404 } else if (rc) {
405 goto finished;
406 }
407 num_rqst++;
408 trace_smb3_set_eof_enter(xid, tcon->tid, ses->Suid, full_path);
409 break;
410 case SMB2_OP_SET_INFO:
411 rqst[num_rqst].rq_iov = &vars->si_iov[0];
412 rqst[num_rqst].rq_nvec = 1;
413
414 size[0] = in_iov[i].iov_len;
415 data[0] = in_iov[i].iov_base;
416
417 if (cfile) {
418 rc = SMB2_set_info_init(tcon, server,
419 &rqst[num_rqst],
420 cfile->fid.persistent_fid,
421 cfile->fid.volatile_fid, current->tgid,
422 FILE_BASIC_INFORMATION,
423 SMB2_O_INFO_FILE, 0, data, size);
424 } else {
425 rc = SMB2_set_info_init(tcon, server,
426 &rqst[num_rqst],
427 COMPOUND_FID,
428 COMPOUND_FID, current->tgid,
429 FILE_BASIC_INFORMATION,
430 SMB2_O_INFO_FILE, 0, data, size);
431 }
432 if (!rc && (!cfile || num_rqst > 1)) {
433 smb2_set_next_command(tcon, &rqst[num_rqst]);
434 smb2_set_related(&rqst[num_rqst]);
435 } else if (rc) {
436 goto finished;
437 }
438 num_rqst++;
439 trace_smb3_set_info_compound_enter(xid, tcon->tid,
440 ses->Suid, full_path);
441 break;
442 case SMB2_OP_RENAME:
443 rqst[num_rqst].rq_iov = &vars->si_iov[0];
444 rqst[num_rqst].rq_nvec = 2;
445
446 len = in_iov[i].iov_len;
447
448 vars->rename_info.ReplaceIfExists = 1;
449 vars->rename_info.RootDirectory = 0;
450 vars->rename_info.FileNameLength = cpu_to_le32(len);
451
452 size[0] = sizeof(struct smb2_file_rename_info);
453 data[0] = &vars->rename_info;
454
455 size[1] = len + 2 /* null */;
456 data[1] = in_iov[i].iov_base;
457
458 if (cfile) {
459 rc = SMB2_set_info_init(tcon, server,
460 &rqst[num_rqst],
461 cfile->fid.persistent_fid,
462 cfile->fid.volatile_fid,
463 current->tgid, FILE_RENAME_INFORMATION,
464 SMB2_O_INFO_FILE, 0, data, size);
465 } else {
466 rc = SMB2_set_info_init(tcon, server,
467 &rqst[num_rqst],
468 COMPOUND_FID, COMPOUND_FID,
469 current->tgid, FILE_RENAME_INFORMATION,
470 SMB2_O_INFO_FILE, 0, data, size);
471 }
472 if (!rc && (!cfile || num_rqst > 1)) {
473 smb2_set_next_command(tcon, &rqst[num_rqst]);
474 smb2_set_related(&rqst[num_rqst]);
475 } else if (rc) {
476 goto finished;
477 }
478 num_rqst++;
479 trace_smb3_rename_enter(xid, tcon->tid, ses->Suid, full_path);
480 break;
481 case SMB2_OP_HARDLINK:
482 rqst[num_rqst].rq_iov = &vars->si_iov[0];
483 rqst[num_rqst].rq_nvec = 2;
484
485 len = in_iov[i].iov_len;
486
487 vars->link_info.ReplaceIfExists = 0;
488 vars->link_info.RootDirectory = 0;
489 vars->link_info.FileNameLength = cpu_to_le32(len);
490
491 size[0] = sizeof(struct smb2_file_link_info);
492 data[0] = &vars->link_info;
493
494 size[1] = len + 2 /* null */;
495 data[1] = in_iov[i].iov_base;
496
497 rc = SMB2_set_info_init(tcon, server,
498 &rqst[num_rqst], COMPOUND_FID,
499 COMPOUND_FID, current->tgid,
500 FILE_LINK_INFORMATION,
501 SMB2_O_INFO_FILE, 0, data, size);
502 if (rc)
503 goto finished;
504 smb2_set_next_command(tcon, &rqst[num_rqst]);
505 smb2_set_related(&rqst[num_rqst++]);
506 trace_smb3_hardlink_enter(xid, tcon->tid, ses->Suid, full_path);
507 break;
508 case SMB2_OP_SET_REPARSE:
509 rqst[num_rqst].rq_iov = vars->io_iov;
510 rqst[num_rqst].rq_nvec = ARRAY_SIZE(vars->io_iov);
511
512 if (cfile) {
513 rc = SMB2_ioctl_init(tcon, server, &rqst[num_rqst],
514 cfile->fid.persistent_fid,
515 cfile->fid.volatile_fid,
516 FSCTL_SET_REPARSE_POINT,
517 in_iov[i].iov_base,
518 in_iov[i].iov_len, 0);
519 } else {
520 rc = SMB2_ioctl_init(tcon, server, &rqst[num_rqst],
521 COMPOUND_FID, COMPOUND_FID,
522 FSCTL_SET_REPARSE_POINT,
523 in_iov[i].iov_base,
524 in_iov[i].iov_len, 0);
525 }
526 if (!rc && (!cfile || num_rqst > 1)) {
527 smb2_set_next_command(tcon, &rqst[num_rqst]);
528 smb2_set_related(&rqst[num_rqst]);
529 } else if (rc) {
530 goto finished;
531 }
532 num_rqst++;
533 trace_smb3_set_reparse_compound_enter(xid, tcon->tid,
534 ses->Suid, full_path);
535 break;
536 case SMB2_OP_GET_REPARSE:
537 rqst[num_rqst].rq_iov = vars->io_iov;
538 rqst[num_rqst].rq_nvec = ARRAY_SIZE(vars->io_iov);
539
540 if (cfile) {
541 rc = SMB2_ioctl_init(tcon, server, &rqst[num_rqst],
542 cfile->fid.persistent_fid,
543 cfile->fid.volatile_fid,
544 FSCTL_GET_REPARSE_POINT,
545 NULL, 0, CIFSMaxBufSize);
546 } else {
547 rc = SMB2_ioctl_init(tcon, server, &rqst[num_rqst],
548 COMPOUND_FID, COMPOUND_FID,
549 FSCTL_GET_REPARSE_POINT,
550 NULL, 0, CIFSMaxBufSize);
551 }
552 if (!rc && (!cfile || num_rqst > 1)) {
553 smb2_set_next_command(tcon, &rqst[num_rqst]);
554 smb2_set_related(&rqst[num_rqst]);
555 } else if (rc) {
556 goto finished;
557 }
558 num_rqst++;
559 trace_smb3_get_reparse_compound_enter(xid, tcon->tid,
560 ses->Suid, full_path);
561 break;
562 case SMB2_OP_QUERY_WSL_EA:
563 rqst[num_rqst].rq_iov = &vars->ea_iov;
564 rqst[num_rqst].rq_nvec = 1;
565
566 if (cfile) {
567 rc = SMB2_query_info_init(tcon, server,
568 &rqst[num_rqst],
569 cfile->fid.persistent_fid,
570 cfile->fid.volatile_fid,
571 FILE_FULL_EA_INFORMATION,
572 SMB2_O_INFO_FILE, 0,
573 SMB2_WSL_MAX_QUERY_EA_RESP_SIZE,
574 sizeof(wsl_query_eas),
575 (void *)wsl_query_eas);
576 } else {
577 rc = SMB2_query_info_init(tcon, server,
578 &rqst[num_rqst],
579 COMPOUND_FID,
580 COMPOUND_FID,
581 FILE_FULL_EA_INFORMATION,
582 SMB2_O_INFO_FILE, 0,
583 SMB2_WSL_MAX_QUERY_EA_RESP_SIZE,
584 sizeof(wsl_query_eas),
585 (void *)wsl_query_eas);
586 }
587 if (!rc && (!cfile || num_rqst > 1)) {
588 smb2_set_next_command(tcon, &rqst[num_rqst]);
589 smb2_set_related(&rqst[num_rqst]);
590 } else if (rc) {
591 goto finished;
592 }
593 num_rqst++;
594 trace_smb3_query_wsl_ea_compound_enter(xid, tcon->tid,
595 ses->Suid, full_path);
596 break;
597 default:
598 cifs_dbg(VFS, "Invalid command\n");
599 rc = -EINVAL;
600 }
601 }
602 if (rc)
603 goto finished;
604
605 /* We already have a handle so we can skip the close */
606 if (cfile)
607 goto after_close;
608 /* Close */
609 flags |= CIFS_CP_CREATE_CLOSE_OP;
610 rqst[num_rqst].rq_iov = &vars->close_iov;
611 rqst[num_rqst].rq_nvec = 1;
612 rc = SMB2_close_init(tcon, server,
613 &rqst[num_rqst], COMPOUND_FID,
614 COMPOUND_FID, false);
615 smb2_set_related(&rqst[num_rqst]);
616 if (rc)
617 goto finished;
618 after_close:
619 num_rqst++;
620
621 if (cfile) {
622 if (retries)
623 for (i = 1; i < num_rqst - 2; i++)
624 smb2_set_replay(server, &rqst[i]);
625
626 rc = compound_send_recv(xid, ses, server,
627 flags, num_rqst - 2,
628 &rqst[1], &resp_buftype[1],
629 &rsp_iov[1]);
630 } else {
631 if (retries)
632 for (i = 0; i < num_rqst; i++)
633 smb2_set_replay(server, &rqst[i]);
634
635 rc = compound_send_recv(xid, ses, server,
636 flags, num_rqst,
637 rqst, resp_buftype,
638 rsp_iov);
639 }
640
641 finished:
642 num_rqst = 0;
643 SMB2_open_free(&rqst[num_rqst++]);
644 if (rc == -EREMCHG) {
645 pr_warn_once("server share %s deleted\n", tcon->tree_name);
646 tcon->need_reconnect = true;
647 }
648
649 tmp_rc = rc;
650
651 if (rc == 0 && num_cmds > 0 && cmds[0] == SMB2_OP_OPEN_QUERY) {
652 create_rsp = rsp_iov[0].iov_base;
653 idata = in_iov[0].iov_base;
654 idata->fi.CreationTime = create_rsp->CreationTime;
655 idata->fi.LastAccessTime = create_rsp->LastAccessTime;
656 idata->fi.LastWriteTime = create_rsp->LastWriteTime;
657 idata->fi.ChangeTime = create_rsp->ChangeTime;
658 idata->fi.Attributes = create_rsp->FileAttributes;
659 idata->fi.AllocationSize = create_rsp->AllocationSize;
660 idata->fi.EndOfFile = create_rsp->EndofFile;
661 if (le32_to_cpu(idata->fi.NumberOfLinks) == 0)
662 idata->fi.NumberOfLinks = cpu_to_le32(1); /* dummy value */
663 idata->fi.DeletePending = 0;
664 idata->fi.Directory = !!(le32_to_cpu(create_rsp->FileAttributes) & ATTR_DIRECTORY);
665
666 /* smb2_parse_contexts() fills idata->fi.IndexNumber */
667 rc = smb2_parse_contexts(server, &rsp_iov[0], &oparms->fid->epoch,
668 oparms->fid->lease_key, &oplock, &idata->fi, NULL);
669 }
670
671 for (i = 0; i < num_cmds; i++) {
672 char *buf = rsp_iov[i + i].iov_base;
673
674 if (buf && resp_buftype[i + 1] != CIFS_NO_BUFFER)
675 rc = server->ops->map_error(buf, false);
676 else
677 rc = tmp_rc;
678 switch (cmds[i]) {
679 case SMB2_OP_QUERY_INFO:
680 idata = in_iov[i].iov_base;
681 idata->contains_posix_file_info = false;
682 if (rc == 0 && cfile && cfile->symlink_target) {
683 idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
684 if (!idata->symlink_target)
685 rc = -ENOMEM;
686 }
687 if (rc == 0) {
688 qi_rsp = (struct smb2_query_info_rsp *)
689 rsp_iov[i + 1].iov_base;
690 rc = smb2_validate_and_copy_iov(
691 le16_to_cpu(qi_rsp->OutputBufferOffset),
692 le32_to_cpu(qi_rsp->OutputBufferLength),
693 &rsp_iov[i + 1], sizeof(idata->fi), (char *)&idata->fi);
694 }
695 SMB2_query_info_free(&rqst[num_rqst++]);
696 if (rc)
697 trace_smb3_query_info_compound_err(xid, tcon->tid,
698 ses->Suid, rc);
699 else
700 trace_smb3_query_info_compound_done(xid, tcon->tid,
701 ses->Suid);
702 break;
703 case SMB2_OP_POSIX_QUERY_INFO:
704 idata = in_iov[i].iov_base;
705 idata->contains_posix_file_info = true;
706 if (rc == 0 && cfile && cfile->symlink_target) {
707 idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
708 if (!idata->symlink_target)
709 rc = -ENOMEM;
710 }
711 if (rc == 0) {
712 qi_rsp = (struct smb2_query_info_rsp *)
713 rsp_iov[i + 1].iov_base;
714 rc = smb2_validate_and_copy_iov(
715 le16_to_cpu(qi_rsp->OutputBufferOffset),
716 le32_to_cpu(qi_rsp->OutputBufferLength),
717 &rsp_iov[i + 1], sizeof(idata->posix_fi) /* add SIDs */,
718 (char *)&idata->posix_fi);
719 }
720 if (rc == 0)
721 rc = parse_posix_sids(idata, &rsp_iov[i + 1]);
722
723 SMB2_query_info_free(&rqst[num_rqst++]);
724 if (rc)
725 trace_smb3_posix_query_info_compound_err(xid, tcon->tid,
726 ses->Suid, rc);
727 else
728 trace_smb3_posix_query_info_compound_done(xid, tcon->tid,
729 ses->Suid);
730 break;
731 case SMB2_OP_DELETE:
732 if (rc)
733 trace_smb3_delete_err(xid, tcon->tid, ses->Suid, rc);
734 else {
735 /*
736 * If dentry (hence, inode) is NULL, lease break is going to
737 * take care of degrading leases on handles for deleted files.
738 */
739 if (inode)
740 cifs_mark_open_handles_for_deleted_file(inode, full_path);
741 trace_smb3_delete_done(xid, tcon->tid, ses->Suid);
742 }
743 break;
744 case SMB2_OP_MKDIR:
745 if (rc)
746 trace_smb3_mkdir_err(xid, tcon->tid, ses->Suid, rc);
747 else
748 trace_smb3_mkdir_done(xid, tcon->tid, ses->Suid);
749 break;
750 case SMB2_OP_HARDLINK:
751 if (rc)
752 trace_smb3_hardlink_err(xid, tcon->tid, ses->Suid, rc);
753 else
754 trace_smb3_hardlink_done(xid, tcon->tid, ses->Suid);
755 SMB2_set_info_free(&rqst[num_rqst++]);
756 break;
757 case SMB2_OP_RENAME:
758 if (rc)
759 trace_smb3_rename_err(xid, tcon->tid, ses->Suid, rc);
760 else
761 trace_smb3_rename_done(xid, tcon->tid, ses->Suid);
762 SMB2_set_info_free(&rqst[num_rqst++]);
763 break;
764 case SMB2_OP_RMDIR:
765 if (rc)
766 trace_smb3_rmdir_err(xid, tcon->tid, ses->Suid, rc);
767 else
768 trace_smb3_rmdir_done(xid, tcon->tid, ses->Suid);
769 SMB2_set_info_free(&rqst[num_rqst++]);
770 break;
771 case SMB2_OP_SET_EOF:
772 if (rc)
773 trace_smb3_set_eof_err(xid, tcon->tid, ses->Suid, rc);
774 else
775 trace_smb3_set_eof_done(xid, tcon->tid, ses->Suid);
776 SMB2_set_info_free(&rqst[num_rqst++]);
777 break;
778 case SMB2_OP_SET_INFO:
779 if (rc)
780 trace_smb3_set_info_compound_err(xid, tcon->tid,
781 ses->Suid, rc);
782 else
783 trace_smb3_set_info_compound_done(xid, tcon->tid,
784 ses->Suid);
785 SMB2_set_info_free(&rqst[num_rqst++]);
786 break;
787 case SMB2_OP_SET_REPARSE:
788 if (rc) {
789 trace_smb3_set_reparse_compound_err(xid, tcon->tid,
790 ses->Suid, rc);
791 } else {
792 trace_smb3_set_reparse_compound_done(xid, tcon->tid,
793 ses->Suid);
794 }
795 SMB2_ioctl_free(&rqst[num_rqst++]);
796 break;
797 case SMB2_OP_GET_REPARSE:
798 if (!rc) {
799 iov = &rsp_iov[i + 1];
800 idata = in_iov[i].iov_base;
801 idata->reparse.io.iov = *iov;
802 idata->reparse.io.buftype = resp_buftype[i + 1];
803 idata->contains_posix_file_info = false; /* BB VERIFY */
804 rbuf = reparse_buf_ptr(iov);
805 if (IS_ERR(rbuf)) {
806 rc = PTR_ERR(rbuf);
807 trace_smb3_get_reparse_compound_err(xid, tcon->tid,
808 ses->Suid, rc);
809 } else {
810 idata->reparse.tag = le32_to_cpu(rbuf->ReparseTag);
811 trace_smb3_get_reparse_compound_done(xid, tcon->tid,
812 ses->Suid);
813 }
814 memset(iov, 0, sizeof(*iov));
815 resp_buftype[i + 1] = CIFS_NO_BUFFER;
816 } else {
817 trace_smb3_get_reparse_compound_err(xid, tcon->tid,
818 ses->Suid, rc);
819 }
820 SMB2_ioctl_free(&rqst[num_rqst++]);
821 break;
822 case SMB2_OP_QUERY_WSL_EA:
823 if (!rc) {
824 idata = in_iov[i].iov_base;
825 idata->contains_posix_file_info = false;
826 qi_rsp = rsp_iov[i + 1].iov_base;
827 data[0] = (u8 *)qi_rsp + le16_to_cpu(qi_rsp->OutputBufferOffset);
828 size[0] = le32_to_cpu(qi_rsp->OutputBufferLength);
829 rc = check_wsl_eas(&rsp_iov[i + 1]);
830 if (!rc) {
831 memcpy(idata->wsl.eas, data[0], size[0]);
832 idata->wsl.eas_len = size[0];
833 }
834 }
835 if (!rc) {
836 trace_smb3_query_wsl_ea_compound_done(xid, tcon->tid,
837 ses->Suid);
838 } else {
839 trace_smb3_query_wsl_ea_compound_err(xid, tcon->tid,
840 ses->Suid, rc);
841 }
842 SMB2_query_info_free(&rqst[num_rqst++]);
843 break;
844 }
845 }
846 SMB2_close_free(&rqst[num_rqst]);
847 rc = tmp_rc;
848
849 num_cmds += 2;
850 if (out_iov && out_buftype) {
851 memcpy(out_iov, rsp_iov, num_cmds * sizeof(*out_iov));
852 memcpy(out_buftype, resp_buftype,
853 num_cmds * sizeof(*out_buftype));
854 } else {
855 for (i = 0; i < num_cmds; i++)
856 free_rsp_buf(resp_buftype[i], rsp_iov[i].iov_base);
857 }
858 num_cmds -= 2; /* correct num_cmds as there could be a retry */
859 kfree(vars);
860
861 if (is_replayable_error(rc) &&
862 smb2_should_replay(tcon, &retries, &cur_sleep))
863 goto replay_again;
864
865 if (cfile)
866 cifsFileInfo_put(cfile);
867
868 return rc;
869 }
870
parse_create_response(struct cifs_open_info_data * data,struct cifs_sb_info * cifs_sb,const char * full_path,const struct kvec * iov)871 static int parse_create_response(struct cifs_open_info_data *data,
872 struct cifs_sb_info *cifs_sb,
873 const char *full_path,
874 const struct kvec *iov)
875 {
876 struct smb2_create_rsp *rsp = iov->iov_base;
877 bool reparse_point = false;
878 u32 tag = 0;
879 int rc = 0;
880
881 switch (rsp->hdr.Status) {
882 case STATUS_IO_REPARSE_TAG_NOT_HANDLED:
883 reparse_point = true;
884 break;
885 case STATUS_STOPPED_ON_SYMLINK:
886 rc = smb2_parse_symlink_response(cifs_sb, iov,
887 full_path,
888 &data->symlink_target);
889 if (rc)
890 return rc;
891 tag = IO_REPARSE_TAG_SYMLINK;
892 reparse_point = true;
893 break;
894 case STATUS_SUCCESS:
895 reparse_point = !!(rsp->Flags & SMB2_CREATE_FLAG_REPARSEPOINT);
896 break;
897 }
898 data->reparse_point = reparse_point;
899 data->reparse.tag = tag;
900 return rc;
901 }
902
903 /* Check only if SMB2_OP_QUERY_WSL_EA command failed in the compound chain */
ea_unsupported(int * cmds,int num_cmds,struct kvec * out_iov,int * out_buftype)904 static bool ea_unsupported(int *cmds, int num_cmds,
905 struct kvec *out_iov, int *out_buftype)
906 {
907 int i;
908
909 if (cmds[num_cmds - 1] != SMB2_OP_QUERY_WSL_EA)
910 return false;
911
912 for (i = 1; i < num_cmds - 1; i++) {
913 struct smb2_hdr *hdr = out_iov[i].iov_base;
914
915 if (out_buftype[i] == CIFS_NO_BUFFER || !hdr ||
916 hdr->Status != STATUS_SUCCESS)
917 return false;
918 }
919 return true;
920 }
921
free_rsp_iov(struct kvec * iovs,int * buftype,int count)922 static inline void free_rsp_iov(struct kvec *iovs, int *buftype, int count)
923 {
924 int i;
925
926 for (i = 0; i < count; i++) {
927 free_rsp_buf(buftype[i], iovs[i].iov_base);
928 memset(&iovs[i], 0, sizeof(*iovs));
929 buftype[i] = CIFS_NO_BUFFER;
930 }
931 }
932
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)933 int smb2_query_path_info(const unsigned int xid,
934 struct cifs_tcon *tcon,
935 struct cifs_sb_info *cifs_sb,
936 const char *full_path,
937 struct cifs_open_info_data *data)
938 {
939 struct kvec in_iov[3], out_iov[5] = {};
940 struct cached_fid *cfid = NULL;
941 struct cifs_open_parms oparms;
942 struct cifsFileInfo *cfile;
943 __u32 create_options = 0;
944 int out_buftype[5] = {};
945 struct smb2_hdr *hdr;
946 int num_cmds = 0;
947 int cmds[3];
948 bool islink;
949 int rc, rc2;
950
951 data->adjust_tz = false;
952 data->reparse_point = false;
953
954 /*
955 * BB TODO: Add support for using cached root handle in SMB3.1.1 POSIX.
956 * Create SMB2_query_posix_info worker function to do non-compounded
957 * query when we already have an open file handle for this. For now this
958 * is fast enough (always using the compounded version).
959 */
960 if (!tcon->posix_extensions) {
961 if (*full_path) {
962 rc = -ENOENT;
963 } else {
964 rc = open_cached_dir(xid, tcon, full_path,
965 cifs_sb, false, &cfid);
966 }
967 /* If it is a root and its handle is cached then use it */
968 if (!rc) {
969 if (cfid->file_all_info_is_valid) {
970 memcpy(&data->fi, &cfid->file_all_info,
971 sizeof(data->fi));
972 } else {
973 rc = SMB2_query_info(xid, tcon,
974 cfid->fid.persistent_fid,
975 cfid->fid.volatile_fid,
976 &data->fi);
977 }
978 close_cached_dir(cfid);
979 return rc;
980 }
981 cmds[num_cmds++] = SMB2_OP_QUERY_INFO;
982 } else {
983 cmds[num_cmds++] = SMB2_OP_POSIX_QUERY_INFO;
984 }
985
986 in_iov[0].iov_base = data;
987 in_iov[0].iov_len = sizeof(*data);
988 in_iov[1] = in_iov[0];
989 in_iov[2] = in_iov[0];
990
991 cifs_get_readable_path(tcon, full_path, &cfile);
992 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, FILE_READ_ATTRIBUTES,
993 FILE_OPEN, create_options, ACL_NO_MODE);
994 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
995 &oparms, in_iov, cmds, num_cmds,
996 cfile, out_iov, out_buftype, NULL);
997 hdr = out_iov[0].iov_base;
998 /*
999 * If first iov is unset, then SMB session was dropped or we've got a
1000 * cached open file (@cfile).
1001 */
1002 if (!hdr || out_buftype[0] == CIFS_NO_BUFFER)
1003 goto out;
1004
1005 switch (rc) {
1006 case 0:
1007 rc = parse_create_response(data, cifs_sb, full_path, &out_iov[0]);
1008 break;
1009 case -EACCES:
1010 /*
1011 * If SMB2_OP_QUERY_INFO (called when POSIX extensions are not used) failed with
1012 * STATUS_ACCESS_DENIED then it means that caller does not have permission to
1013 * open the path with FILE_READ_ATTRIBUTES access and therefore cannot issue
1014 * SMB2_OP_QUERY_INFO command.
1015 *
1016 * There is an alternative way how to query limited information about path but still
1017 * suitable for stat() syscall. SMB2 OPEN/CREATE operation returns in its successful
1018 * response subset of query information.
1019 *
1020 * So try to open the path without FILE_READ_ATTRIBUTES but with MAXIMUM_ALLOWED
1021 * access which will grant the maximum possible access to the file and the response
1022 * will contain required query information for stat() syscall.
1023 */
1024
1025 if (tcon->posix_extensions)
1026 break;
1027
1028 num_cmds = 1;
1029 cmds[0] = SMB2_OP_OPEN_QUERY;
1030 in_iov[0].iov_base = data;
1031 in_iov[0].iov_len = sizeof(*data);
1032 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, MAXIMUM_ALLOWED,
1033 FILE_OPEN, create_options, ACL_NO_MODE);
1034 free_rsp_iov(out_iov, out_buftype, ARRAY_SIZE(out_iov));
1035 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
1036 &oparms, in_iov, cmds, num_cmds,
1037 cfile, out_iov, out_buftype, NULL);
1038
1039 hdr = out_iov[0].iov_base;
1040 if (!hdr || out_buftype[0] == CIFS_NO_BUFFER)
1041 goto out;
1042
1043 if (!rc)
1044 rc = parse_create_response(data, cifs_sb, full_path, &out_iov[0]);
1045 break;
1046 case -EOPNOTSUPP:
1047 /*
1048 * BB TODO: When support for special files added to Samba
1049 * re-verify this path.
1050 */
1051 rc = parse_create_response(data, cifs_sb, full_path, &out_iov[0]);
1052 if (rc || !data->reparse_point)
1053 goto out;
1054
1055 /*
1056 * Skip SMB2_OP_GET_REPARSE if symlink already parsed in create
1057 * response.
1058 */
1059 if (data->reparse.tag != IO_REPARSE_TAG_SYMLINK)
1060 cmds[num_cmds++] = SMB2_OP_GET_REPARSE;
1061 if (!tcon->posix_extensions)
1062 cmds[num_cmds++] = SMB2_OP_QUERY_WSL_EA;
1063
1064 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path,
1065 FILE_READ_ATTRIBUTES |
1066 FILE_READ_EA | SYNCHRONIZE,
1067 FILE_OPEN, create_options |
1068 OPEN_REPARSE_POINT, ACL_NO_MODE);
1069 cifs_get_readable_path(tcon, full_path, &cfile);
1070 free_rsp_iov(out_iov, out_buftype, ARRAY_SIZE(out_iov));
1071 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
1072 &oparms, in_iov, cmds, num_cmds,
1073 cfile, out_iov, out_buftype, NULL);
1074 if (rc && ea_unsupported(cmds, num_cmds,
1075 out_iov, out_buftype)) {
1076 if (data->reparse.tag != IO_REPARSE_TAG_LX_BLK &&
1077 data->reparse.tag != IO_REPARSE_TAG_LX_CHR)
1078 rc = 0;
1079 else
1080 rc = -EOPNOTSUPP;
1081 }
1082
1083 if (data->reparse.tag == IO_REPARSE_TAG_SYMLINK && !rc) {
1084 bool directory = le32_to_cpu(data->fi.Attributes) & ATTR_DIRECTORY;
1085 rc = smb2_fix_symlink_target_type(&data->symlink_target, directory, cifs_sb);
1086 }
1087 break;
1088 case -EREMOTE:
1089 break;
1090 default:
1091 if (hdr->Status != STATUS_OBJECT_NAME_INVALID)
1092 break;
1093 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb,
1094 full_path, &islink);
1095 if (rc2) {
1096 rc = rc2;
1097 goto out;
1098 }
1099 if (islink)
1100 rc = -EREMOTE;
1101 }
1102
1103 out:
1104 free_rsp_iov(out_iov, out_buftype, ARRAY_SIZE(out_iov));
1105 return rc;
1106 }
1107
1108 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)1109 smb2_mkdir(const unsigned int xid, struct inode *parent_inode, umode_t mode,
1110 struct cifs_tcon *tcon, const char *name,
1111 struct cifs_sb_info *cifs_sb)
1112 {
1113 struct cifs_open_parms oparms;
1114
1115 oparms = CIFS_OPARMS(cifs_sb, tcon, name, FILE_WRITE_ATTRIBUTES,
1116 FILE_CREATE, CREATE_NOT_FILE, mode);
1117 return smb2_compound_op(xid, tcon, cifs_sb,
1118 name, &oparms, NULL,
1119 &(int){SMB2_OP_MKDIR}, 1,
1120 NULL, NULL, NULL, NULL);
1121 }
1122
1123 void
smb2_mkdir_setinfo(struct inode * inode,const char * name,struct cifs_sb_info * cifs_sb,struct cifs_tcon * tcon,const unsigned int xid)1124 smb2_mkdir_setinfo(struct inode *inode, const char *name,
1125 struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
1126 const unsigned int xid)
1127 {
1128 struct cifs_open_parms oparms;
1129 FILE_BASIC_INFO data = {};
1130 struct cifsInodeInfo *cifs_i;
1131 struct cifsFileInfo *cfile;
1132 struct kvec in_iov;
1133 u32 dosattrs;
1134 int tmprc;
1135
1136 in_iov.iov_base = &data;
1137 in_iov.iov_len = sizeof(data);
1138 cifs_i = CIFS_I(inode);
1139 dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
1140 data.Attributes = cpu_to_le32(dosattrs);
1141 cifs_get_writable_path(tcon, name, FIND_WR_ANY, &cfile);
1142 oparms = CIFS_OPARMS(cifs_sb, tcon, name, FILE_WRITE_ATTRIBUTES,
1143 FILE_CREATE, CREATE_NOT_FILE, ACL_NO_MODE);
1144 tmprc = smb2_compound_op(xid, tcon, cifs_sb, name,
1145 &oparms, &in_iov,
1146 &(int){SMB2_OP_SET_INFO}, 1,
1147 cfile, NULL, NULL, NULL);
1148 if (tmprc == 0)
1149 cifs_i->cifsAttrs = dosattrs;
1150 }
1151
1152 int
smb2_rmdir(const unsigned int xid,struct cifs_tcon * tcon,const char * name,struct cifs_sb_info * cifs_sb)1153 smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
1154 struct cifs_sb_info *cifs_sb)
1155 {
1156 struct cifs_open_parms oparms;
1157
1158 drop_cached_dir_by_name(xid, tcon, name, cifs_sb);
1159 oparms = CIFS_OPARMS(cifs_sb, tcon, name, DELETE,
1160 FILE_OPEN, CREATE_NOT_FILE, ACL_NO_MODE);
1161 return smb2_compound_op(xid, tcon, cifs_sb,
1162 name, &oparms, NULL,
1163 &(int){SMB2_OP_RMDIR}, 1,
1164 NULL, NULL, NULL, NULL);
1165 }
1166
1167 int
smb2_unlink(const unsigned int xid,struct cifs_tcon * tcon,const char * name,struct cifs_sb_info * cifs_sb,struct dentry * dentry)1168 smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
1169 struct cifs_sb_info *cifs_sb, struct dentry *dentry)
1170 {
1171 struct cifs_open_parms oparms;
1172
1173 oparms = CIFS_OPARMS(cifs_sb, tcon, name,
1174 DELETE, FILE_OPEN,
1175 CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
1176 ACL_NO_MODE);
1177 int rc = smb2_compound_op(xid, tcon, cifs_sb, name, &oparms,
1178 NULL, &(int){SMB2_OP_DELETE}, 1,
1179 NULL, NULL, NULL, dentry);
1180 if (rc == -EINVAL) {
1181 cifs_dbg(FYI, "invalid lease key, resending request without lease");
1182 rc = smb2_compound_op(xid, tcon, cifs_sb, name, &oparms,
1183 NULL, &(int){SMB2_OP_DELETE}, 1,
1184 NULL, NULL, NULL, NULL);
1185 }
1186 return rc;
1187 }
1188
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,struct dentry * dentry)1189 static int smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
1190 const char *from_name, const char *to_name,
1191 struct cifs_sb_info *cifs_sb,
1192 __u32 create_options, __u32 access,
1193 int command, struct cifsFileInfo *cfile,
1194 struct dentry *dentry)
1195 {
1196 struct cifs_open_parms oparms;
1197 struct kvec in_iov;
1198 __le16 *smb2_to_name = NULL;
1199 int rc;
1200
1201 smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
1202 if (smb2_to_name == NULL) {
1203 rc = -ENOMEM;
1204 goto smb2_rename_path;
1205 }
1206 in_iov.iov_base = smb2_to_name;
1207 in_iov.iov_len = 2 * UniStrnlen((wchar_t *)smb2_to_name, PATH_MAX);
1208 oparms = CIFS_OPARMS(cifs_sb, tcon, from_name, access, FILE_OPEN,
1209 create_options, ACL_NO_MODE);
1210 rc = smb2_compound_op(xid, tcon, cifs_sb, from_name,
1211 &oparms, &in_iov, &command, 1,
1212 cfile, NULL, NULL, dentry);
1213 smb2_rename_path:
1214 kfree(smb2_to_name);
1215 return rc;
1216 }
1217
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)1218 int smb2_rename_path(const unsigned int xid,
1219 struct cifs_tcon *tcon,
1220 struct dentry *source_dentry,
1221 const char *from_name, const char *to_name,
1222 struct cifs_sb_info *cifs_sb)
1223 {
1224 struct cifsFileInfo *cfile;
1225 __u32 co = file_create_options(source_dentry);
1226
1227 drop_cached_dir_by_name(xid, tcon, from_name, cifs_sb);
1228 cifs_get_writable_path(tcon, from_name, FIND_WR_WITH_DELETE, &cfile);
1229
1230 int rc = smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
1231 co, DELETE, SMB2_OP_RENAME, cfile, source_dentry);
1232 if (rc == -EINVAL) {
1233 cifs_dbg(FYI, "invalid lease key, resending request without lease");
1234 cifs_get_writable_path(tcon, from_name,
1235 FIND_WR_WITH_DELETE, &cfile);
1236 rc = smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
1237 co, DELETE, SMB2_OP_RENAME, cfile, NULL);
1238 }
1239 return rc;
1240 }
1241
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)1242 int smb2_create_hardlink(const unsigned int xid,
1243 struct cifs_tcon *tcon,
1244 struct dentry *source_dentry,
1245 const char *from_name, const char *to_name,
1246 struct cifs_sb_info *cifs_sb)
1247 {
1248 __u32 co = file_create_options(source_dentry);
1249
1250 return smb2_set_path_attr(xid, tcon, from_name, to_name,
1251 cifs_sb, co, FILE_READ_ATTRIBUTES,
1252 SMB2_OP_HARDLINK, NULL, NULL);
1253 }
1254
1255 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,struct dentry * dentry)1256 smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
1257 const char *full_path, __u64 size,
1258 struct cifs_sb_info *cifs_sb, bool set_alloc,
1259 struct dentry *dentry)
1260 {
1261 struct cifs_open_parms oparms;
1262 struct cifsFileInfo *cfile;
1263 struct kvec in_iov;
1264 __le64 eof = cpu_to_le64(size);
1265 int rc;
1266
1267 in_iov.iov_base = &eof;
1268 in_iov.iov_len = sizeof(eof);
1269 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
1270
1271 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, FILE_WRITE_DATA,
1272 FILE_OPEN, 0, ACL_NO_MODE);
1273 rc = smb2_compound_op(xid, tcon, cifs_sb,
1274 full_path, &oparms, &in_iov,
1275 &(int){SMB2_OP_SET_EOF}, 1,
1276 cfile, NULL, NULL, dentry);
1277 if (rc == -EINVAL) {
1278 cifs_dbg(FYI, "invalid lease key, resending request without lease");
1279 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
1280 rc = smb2_compound_op(xid, tcon, cifs_sb,
1281 full_path, &oparms, &in_iov,
1282 &(int){SMB2_OP_SET_EOF}, 1,
1283 cfile, NULL, NULL, NULL);
1284 }
1285 return rc;
1286 }
1287
1288 int
smb2_set_file_info(struct inode * inode,const char * full_path,FILE_BASIC_INFO * buf,const unsigned int xid)1289 smb2_set_file_info(struct inode *inode, const char *full_path,
1290 FILE_BASIC_INFO *buf, const unsigned int xid)
1291 {
1292 struct cifs_open_parms oparms;
1293 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1294 struct tcon_link *tlink;
1295 struct cifs_tcon *tcon;
1296 struct cifsFileInfo *cfile;
1297 struct kvec in_iov = { .iov_base = buf, .iov_len = sizeof(*buf), };
1298 int rc;
1299
1300 if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
1301 (buf->LastWriteTime == 0) && (buf->ChangeTime == 0) &&
1302 (buf->Attributes == 0))
1303 return 0; /* would be a no op, no sense sending this */
1304
1305 tlink = cifs_sb_tlink(cifs_sb);
1306 if (IS_ERR(tlink))
1307 return PTR_ERR(tlink);
1308 tcon = tlink_tcon(tlink);
1309
1310 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
1311 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, FILE_WRITE_ATTRIBUTES,
1312 FILE_OPEN, 0, ACL_NO_MODE);
1313 rc = smb2_compound_op(xid, tcon, cifs_sb,
1314 full_path, &oparms, &in_iov,
1315 &(int){SMB2_OP_SET_INFO}, 1,
1316 cfile, NULL, NULL, NULL);
1317 cifs_put_tlink(tlink);
1318 return rc;
1319 }
1320
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,bool directory,struct kvec * reparse_iov,struct kvec * xattr_iov)1321 struct inode *smb2_get_reparse_inode(struct cifs_open_info_data *data,
1322 struct super_block *sb,
1323 const unsigned int xid,
1324 struct cifs_tcon *tcon,
1325 const char *full_path,
1326 bool directory,
1327 struct kvec *reparse_iov,
1328 struct kvec *xattr_iov)
1329 {
1330 struct cifs_open_parms oparms;
1331 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1332 struct cifsFileInfo *cfile;
1333 struct inode *new = NULL;
1334 int out_buftype[4] = {};
1335 struct kvec out_iov[4] = {};
1336 struct kvec in_iov[2];
1337 int cmds[2];
1338 int rc;
1339 int i;
1340
1341 /*
1342 * If server filesystem does not support reparse points then do not
1343 * attempt to create reparse point. This will prevent creating unusable
1344 * empty object on the server.
1345 */
1346 if (!(le32_to_cpu(tcon->fsAttrInfo.Attributes) & FILE_SUPPORTS_REPARSE_POINTS))
1347 return ERR_PTR(-EOPNOTSUPP);
1348
1349 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path,
1350 SYNCHRONIZE | DELETE |
1351 FILE_READ_ATTRIBUTES |
1352 FILE_WRITE_ATTRIBUTES,
1353 FILE_CREATE,
1354 (directory ? CREATE_NOT_FILE : CREATE_NOT_DIR) | OPEN_REPARSE_POINT,
1355 ACL_NO_MODE);
1356 if (xattr_iov)
1357 oparms.ea_cctx = xattr_iov;
1358
1359 cmds[0] = SMB2_OP_SET_REPARSE;
1360 in_iov[0] = *reparse_iov;
1361 in_iov[1].iov_base = data;
1362 in_iov[1].iov_len = sizeof(*data);
1363
1364 if (tcon->posix_extensions) {
1365 cmds[1] = SMB2_OP_POSIX_QUERY_INFO;
1366 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
1367 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, &oparms,
1368 in_iov, cmds, 2, cfile, out_iov, out_buftype, NULL);
1369 if (!rc) {
1370 rc = smb311_posix_get_inode_info(&new, full_path,
1371 data, sb, xid);
1372 }
1373 } else {
1374 cmds[1] = SMB2_OP_QUERY_INFO;
1375 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
1376 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, &oparms,
1377 in_iov, cmds, 2, cfile, out_iov, out_buftype, NULL);
1378 if (!rc) {
1379 rc = cifs_get_inode_info(&new, full_path,
1380 data, sb, xid, NULL);
1381 }
1382 }
1383
1384
1385 /*
1386 * If CREATE was successful but SMB2_OP_SET_REPARSE failed then
1387 * remove the intermediate object created by CREATE. Otherwise
1388 * empty object stay on the server when reparse call failed.
1389 */
1390 if (rc &&
1391 out_iov[0].iov_base != NULL && out_buftype[0] != CIFS_NO_BUFFER &&
1392 ((struct smb2_hdr *)out_iov[0].iov_base)->Status == STATUS_SUCCESS &&
1393 (out_iov[1].iov_base == NULL || out_buftype[1] == CIFS_NO_BUFFER ||
1394 ((struct smb2_hdr *)out_iov[1].iov_base)->Status != STATUS_SUCCESS))
1395 smb2_unlink(xid, tcon, full_path, cifs_sb, NULL);
1396
1397 for (i = 0; i < ARRAY_SIZE(out_buftype); i++)
1398 free_rsp_buf(out_buftype[i], out_iov[i].iov_base);
1399
1400 return rc ? ERR_PTR(rc) : new;
1401 }
1402
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)1403 int smb2_query_reparse_point(const unsigned int xid,
1404 struct cifs_tcon *tcon,
1405 struct cifs_sb_info *cifs_sb,
1406 const char *full_path,
1407 u32 *tag, struct kvec *rsp,
1408 int *rsp_buftype)
1409 {
1410 struct cifs_open_parms oparms;
1411 struct cifs_open_info_data data = {};
1412 struct cifsFileInfo *cfile;
1413 struct kvec in_iov = { .iov_base = &data, .iov_len = sizeof(data), };
1414 int rc;
1415
1416 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1417
1418 cifs_get_readable_path(tcon, full_path, &cfile);
1419 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path,
1420 FILE_READ_ATTRIBUTES | FILE_READ_EA | SYNCHRONIZE,
1421 FILE_OPEN, OPEN_REPARSE_POINT, ACL_NO_MODE);
1422 rc = smb2_compound_op(xid, tcon, cifs_sb,
1423 full_path, &oparms, &in_iov,
1424 &(int){SMB2_OP_GET_REPARSE}, 1,
1425 cfile, NULL, NULL, NULL);
1426 if (rc)
1427 goto out;
1428
1429 *tag = data.reparse.tag;
1430 *rsp = data.reparse.io.iov;
1431 *rsp_buftype = data.reparse.io.buftype;
1432 memset(&data.reparse.io.iov, 0, sizeof(data.reparse.io.iov));
1433 data.reparse.io.buftype = CIFS_NO_BUFFER;
1434 out:
1435 cifs_free_open_info(&data);
1436 return rc;
1437 }
1438