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 rc = -ENOMEM;
212 goto out;
213 }
214 rqst = &vars->rqst[0];
215 rsp_iov = &vars->rsp_iov[0];
216
217 if (smb3_encryption_required(tcon))
218 flags |= CIFS_TRANSFORM_REQ;
219
220 for (i = 0; i < ARRAY_SIZE(resp_buftype); i++)
221 resp_buftype[i] = CIFS_NO_BUFFER;
222
223 /* We already have a handle so we can skip the open */
224 if (cfile)
225 goto after_open;
226
227 /* Open */
228 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
229 if (!utf16_path) {
230 rc = -ENOMEM;
231 goto finished;
232 }
233
234 /* if there is an existing lease, reuse it */
235
236 /*
237 * note: files with hardlinks cause unexpected behaviour. As per MS-SMB2,
238 * lease keys are associated with the filepath. We are maintaining lease keys
239 * with the inode on the client. If the file has hardlinks, it is possible
240 * that the lease for a file be reused for an operation on its hardlink or
241 * vice versa.
242 * As a workaround, send request using an existing lease key and if the server
243 * returns STATUS_INVALID_PARAMETER, which maps to EINVAL, send the request
244 * again without the lease.
245 */
246 if (dentry) {
247 inode = d_inode(dentry);
248 if (CIFS_I(inode)->lease_granted && server->ops->get_lease_key) {
249 oplock = SMB2_OPLOCK_LEVEL_LEASE;
250 server->ops->get_lease_key(inode, &fid);
251 }
252 }
253
254 vars->oparms = *oparms;
255 vars->oparms.fid = &fid;
256
257 rqst[num_rqst].rq_iov = &vars->open_iov[0];
258 rqst[num_rqst].rq_nvec = SMB2_CREATE_IOV_SIZE;
259 rc = SMB2_open_init(tcon, server,
260 &rqst[num_rqst], &oplock, &vars->oparms,
261 utf16_path);
262 kfree(utf16_path);
263 if (rc)
264 goto finished;
265
266 smb2_set_next_command(tcon, &rqst[num_rqst]);
267 after_open:
268 num_rqst++;
269 rc = 0;
270
271 i = 0;
272
273 /* Skip the leading explicit OPEN operation */
274 if (num_cmds > 0 && cmds[0] == SMB2_OP_OPEN_QUERY)
275 i++;
276
277 for (; i < num_cmds; i++) {
278 /* Operation */
279 switch (cmds[i]) {
280 case SMB2_OP_QUERY_INFO:
281 rqst[num_rqst].rq_iov = &vars->qi_iov;
282 rqst[num_rqst].rq_nvec = 1;
283
284 if (cfile) {
285 rc = SMB2_query_info_init(tcon, server,
286 &rqst[num_rqst],
287 cfile->fid.persistent_fid,
288 cfile->fid.volatile_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 } else {
294 rc = SMB2_query_info_init(tcon, server,
295 &rqst[num_rqst],
296 COMPOUND_FID,
297 COMPOUND_FID,
298 FILE_ALL_INFORMATION,
299 SMB2_O_INFO_FILE, 0,
300 sizeof(struct smb2_file_all_info) +
301 PATH_MAX * 2, 0, NULL);
302 }
303 if (!rc && (!cfile || num_rqst > 1)) {
304 smb2_set_next_command(tcon, &rqst[num_rqst]);
305 smb2_set_related(&rqst[num_rqst]);
306 } else if (rc) {
307 goto finished;
308 }
309 num_rqst++;
310 trace_smb3_query_info_compound_enter(xid, tcon->tid,
311 ses->Suid, full_path);
312 break;
313 case SMB2_OP_POSIX_QUERY_INFO:
314 rqst[num_rqst].rq_iov = &vars->qi_iov;
315 rqst[num_rqst].rq_nvec = 1;
316
317 if (cfile) {
318 /* TBD: fix following to allow for longer SIDs */
319 rc = SMB2_query_info_init(tcon, server,
320 &rqst[num_rqst],
321 cfile->fid.persistent_fid,
322 cfile->fid.volatile_fid,
323 SMB_FIND_FILE_POSIX_INFO,
324 SMB2_O_INFO_FILE, 0,
325 sizeof(struct smb311_posix_qinfo *) +
326 (PATH_MAX * 2) +
327 (sizeof(struct smb_sid) * 2), 0, NULL);
328 } else {
329 rc = SMB2_query_info_init(tcon, server,
330 &rqst[num_rqst],
331 COMPOUND_FID,
332 COMPOUND_FID,
333 SMB_FIND_FILE_POSIX_INFO,
334 SMB2_O_INFO_FILE, 0,
335 sizeof(struct smb311_posix_qinfo *) +
336 (PATH_MAX * 2) +
337 (sizeof(struct smb_sid) * 2), 0, NULL);
338 }
339 if (!rc && (!cfile || num_rqst > 1)) {
340 smb2_set_next_command(tcon, &rqst[num_rqst]);
341 smb2_set_related(&rqst[num_rqst]);
342 } else if (rc) {
343 goto finished;
344 }
345 num_rqst++;
346 trace_smb3_posix_query_info_compound_enter(xid, tcon->tid,
347 ses->Suid, full_path);
348 break;
349 case SMB2_OP_DELETE:
350 trace_smb3_delete_enter(xid, tcon->tid, ses->Suid, full_path);
351 break;
352 case SMB2_OP_MKDIR:
353 /*
354 * Directories are created through parameters in the
355 * SMB2_open() call.
356 */
357 trace_smb3_mkdir_enter(xid, tcon->tid, ses->Suid, full_path);
358 break;
359 case SMB2_OP_RMDIR:
360 rqst[num_rqst].rq_iov = &vars->si_iov[0];
361 rqst[num_rqst].rq_nvec = 1;
362
363 size[0] = 1; /* sizeof __u8 See MS-FSCC section 2.4.11 */
364 data[0] = &delete_pending[0];
365
366 rc = SMB2_set_info_init(tcon, server,
367 &rqst[num_rqst], COMPOUND_FID,
368 COMPOUND_FID, current->tgid,
369 FILE_DISPOSITION_INFORMATION,
370 SMB2_O_INFO_FILE, 0, data, size);
371 if (rc)
372 goto finished;
373 smb2_set_next_command(tcon, &rqst[num_rqst]);
374 smb2_set_related(&rqst[num_rqst++]);
375 trace_smb3_rmdir_enter(xid, tcon->tid, ses->Suid, full_path);
376 break;
377 case SMB2_OP_SET_EOF:
378 rqst[num_rqst].rq_iov = &vars->si_iov[0];
379 rqst[num_rqst].rq_nvec = 1;
380
381 size[0] = in_iov[i].iov_len;
382 data[0] = in_iov[i].iov_base;
383
384 if (cfile) {
385 rc = SMB2_set_info_init(tcon, server,
386 &rqst[num_rqst],
387 cfile->fid.persistent_fid,
388 cfile->fid.volatile_fid,
389 current->tgid,
390 FILE_END_OF_FILE_INFORMATION,
391 SMB2_O_INFO_FILE, 0,
392 data, size);
393 } else {
394 rc = SMB2_set_info_init(tcon, server,
395 &rqst[num_rqst],
396 COMPOUND_FID,
397 COMPOUND_FID,
398 current->tgid,
399 FILE_END_OF_FILE_INFORMATION,
400 SMB2_O_INFO_FILE, 0,
401 data, size);
402 }
403 if (!rc && (!cfile || num_rqst > 1)) {
404 smb2_set_next_command(tcon, &rqst[num_rqst]);
405 smb2_set_related(&rqst[num_rqst]);
406 } else if (rc) {
407 goto finished;
408 }
409 num_rqst++;
410 trace_smb3_set_eof_enter(xid, tcon->tid, ses->Suid, full_path);
411 break;
412 case SMB2_OP_SET_INFO:
413 rqst[num_rqst].rq_iov = &vars->si_iov[0];
414 rqst[num_rqst].rq_nvec = 1;
415
416 size[0] = in_iov[i].iov_len;
417 data[0] = in_iov[i].iov_base;
418
419 if (cfile) {
420 rc = SMB2_set_info_init(tcon, server,
421 &rqst[num_rqst],
422 cfile->fid.persistent_fid,
423 cfile->fid.volatile_fid, current->tgid,
424 FILE_BASIC_INFORMATION,
425 SMB2_O_INFO_FILE, 0, data, size);
426 } else {
427 rc = SMB2_set_info_init(tcon, server,
428 &rqst[num_rqst],
429 COMPOUND_FID,
430 COMPOUND_FID, current->tgid,
431 FILE_BASIC_INFORMATION,
432 SMB2_O_INFO_FILE, 0, data, size);
433 }
434 if (!rc && (!cfile || num_rqst > 1)) {
435 smb2_set_next_command(tcon, &rqst[num_rqst]);
436 smb2_set_related(&rqst[num_rqst]);
437 } else if (rc) {
438 goto finished;
439 }
440 num_rqst++;
441 trace_smb3_set_info_compound_enter(xid, tcon->tid,
442 ses->Suid, full_path);
443 break;
444 case SMB2_OP_RENAME:
445 rqst[num_rqst].rq_iov = &vars->si_iov[0];
446 rqst[num_rqst].rq_nvec = 2;
447
448 len = in_iov[i].iov_len;
449
450 vars->rename_info.ReplaceIfExists = 1;
451 vars->rename_info.RootDirectory = 0;
452 vars->rename_info.FileNameLength = cpu_to_le32(len);
453
454 size[0] = sizeof(struct smb2_file_rename_info);
455 data[0] = &vars->rename_info;
456
457 size[1] = len + 2 /* null */;
458 data[1] = in_iov[i].iov_base;
459
460 if (cfile) {
461 rc = SMB2_set_info_init(tcon, server,
462 &rqst[num_rqst],
463 cfile->fid.persistent_fid,
464 cfile->fid.volatile_fid,
465 current->tgid, FILE_RENAME_INFORMATION,
466 SMB2_O_INFO_FILE, 0, data, size);
467 } else {
468 rc = SMB2_set_info_init(tcon, server,
469 &rqst[num_rqst],
470 COMPOUND_FID, COMPOUND_FID,
471 current->tgid, FILE_RENAME_INFORMATION,
472 SMB2_O_INFO_FILE, 0, data, size);
473 }
474 if (!rc && (!cfile || num_rqst > 1)) {
475 smb2_set_next_command(tcon, &rqst[num_rqst]);
476 smb2_set_related(&rqst[num_rqst]);
477 } else if (rc) {
478 goto finished;
479 }
480 num_rqst++;
481 trace_smb3_rename_enter(xid, tcon->tid, ses->Suid, full_path);
482 break;
483 case SMB2_OP_HARDLINK:
484 rqst[num_rqst].rq_iov = &vars->si_iov[0];
485 rqst[num_rqst].rq_nvec = 2;
486
487 len = in_iov[i].iov_len;
488
489 vars->link_info.ReplaceIfExists = 0;
490 vars->link_info.RootDirectory = 0;
491 vars->link_info.FileNameLength = cpu_to_le32(len);
492
493 size[0] = sizeof(struct smb2_file_link_info);
494 data[0] = &vars->link_info;
495
496 size[1] = len + 2 /* null */;
497 data[1] = in_iov[i].iov_base;
498
499 rc = SMB2_set_info_init(tcon, server,
500 &rqst[num_rqst], COMPOUND_FID,
501 COMPOUND_FID, current->tgid,
502 FILE_LINK_INFORMATION,
503 SMB2_O_INFO_FILE, 0, data, size);
504 if (rc)
505 goto finished;
506 smb2_set_next_command(tcon, &rqst[num_rqst]);
507 smb2_set_related(&rqst[num_rqst++]);
508 trace_smb3_hardlink_enter(xid, tcon->tid, ses->Suid, full_path);
509 break;
510 case SMB2_OP_SET_REPARSE:
511 rqst[num_rqst].rq_iov = vars->io_iov;
512 rqst[num_rqst].rq_nvec = ARRAY_SIZE(vars->io_iov);
513
514 if (cfile) {
515 rc = SMB2_ioctl_init(tcon, server, &rqst[num_rqst],
516 cfile->fid.persistent_fid,
517 cfile->fid.volatile_fid,
518 FSCTL_SET_REPARSE_POINT,
519 in_iov[i].iov_base,
520 in_iov[i].iov_len, 0);
521 } else {
522 rc = SMB2_ioctl_init(tcon, server, &rqst[num_rqst],
523 COMPOUND_FID, COMPOUND_FID,
524 FSCTL_SET_REPARSE_POINT,
525 in_iov[i].iov_base,
526 in_iov[i].iov_len, 0);
527 }
528 if (!rc && (!cfile || num_rqst > 1)) {
529 smb2_set_next_command(tcon, &rqst[num_rqst]);
530 smb2_set_related(&rqst[num_rqst]);
531 } else if (rc) {
532 goto finished;
533 }
534 num_rqst++;
535 trace_smb3_set_reparse_compound_enter(xid, tcon->tid,
536 ses->Suid, full_path);
537 break;
538 case SMB2_OP_GET_REPARSE:
539 rqst[num_rqst].rq_iov = vars->io_iov;
540 rqst[num_rqst].rq_nvec = ARRAY_SIZE(vars->io_iov);
541
542 if (cfile) {
543 rc = SMB2_ioctl_init(tcon, server, &rqst[num_rqst],
544 cfile->fid.persistent_fid,
545 cfile->fid.volatile_fid,
546 FSCTL_GET_REPARSE_POINT,
547 NULL, 0, CIFSMaxBufSize);
548 } else {
549 rc = SMB2_ioctl_init(tcon, server, &rqst[num_rqst],
550 COMPOUND_FID, COMPOUND_FID,
551 FSCTL_GET_REPARSE_POINT,
552 NULL, 0, CIFSMaxBufSize);
553 }
554 if (!rc && (!cfile || num_rqst > 1)) {
555 smb2_set_next_command(tcon, &rqst[num_rqst]);
556 smb2_set_related(&rqst[num_rqst]);
557 } else if (rc) {
558 goto finished;
559 }
560 num_rqst++;
561 trace_smb3_get_reparse_compound_enter(xid, tcon->tid,
562 ses->Suid, full_path);
563 break;
564 case SMB2_OP_QUERY_WSL_EA:
565 rqst[num_rqst].rq_iov = &vars->ea_iov;
566 rqst[num_rqst].rq_nvec = 1;
567
568 if (cfile) {
569 rc = SMB2_query_info_init(tcon, server,
570 &rqst[num_rqst],
571 cfile->fid.persistent_fid,
572 cfile->fid.volatile_fid,
573 FILE_FULL_EA_INFORMATION,
574 SMB2_O_INFO_FILE, 0,
575 SMB2_WSL_MAX_QUERY_EA_RESP_SIZE,
576 sizeof(wsl_query_eas),
577 (void *)wsl_query_eas);
578 } else {
579 rc = SMB2_query_info_init(tcon, server,
580 &rqst[num_rqst],
581 COMPOUND_FID,
582 COMPOUND_FID,
583 FILE_FULL_EA_INFORMATION,
584 SMB2_O_INFO_FILE, 0,
585 SMB2_WSL_MAX_QUERY_EA_RESP_SIZE,
586 sizeof(wsl_query_eas),
587 (void *)wsl_query_eas);
588 }
589 if (!rc && (!cfile || num_rqst > 1)) {
590 smb2_set_next_command(tcon, &rqst[num_rqst]);
591 smb2_set_related(&rqst[num_rqst]);
592 } else if (rc) {
593 goto finished;
594 }
595 num_rqst++;
596 trace_smb3_query_wsl_ea_compound_enter(xid, tcon->tid,
597 ses->Suid, full_path);
598 break;
599 default:
600 cifs_dbg(VFS, "Invalid command\n");
601 rc = -EINVAL;
602 }
603 }
604 if (rc)
605 goto finished;
606
607 /* We already have a handle so we can skip the close */
608 if (cfile)
609 goto after_close;
610 /* Close */
611 flags |= CIFS_CP_CREATE_CLOSE_OP;
612 rqst[num_rqst].rq_iov = &vars->close_iov;
613 rqst[num_rqst].rq_nvec = 1;
614 rc = SMB2_close_init(tcon, server,
615 &rqst[num_rqst], COMPOUND_FID,
616 COMPOUND_FID, false);
617 smb2_set_related(&rqst[num_rqst]);
618 if (rc)
619 goto finished;
620 after_close:
621 num_rqst++;
622
623 if (cfile) {
624 if (retries)
625 for (i = 1; i < num_rqst - 2; i++)
626 smb2_set_replay(server, &rqst[i]);
627
628 rc = compound_send_recv(xid, ses, server,
629 flags, num_rqst - 2,
630 &rqst[1], &resp_buftype[1],
631 &rsp_iov[1]);
632 } else {
633 if (retries)
634 for (i = 0; i < num_rqst; i++)
635 smb2_set_replay(server, &rqst[i]);
636
637 rc = compound_send_recv(xid, ses, server,
638 flags, num_rqst,
639 rqst, resp_buftype,
640 rsp_iov);
641 }
642
643 finished:
644 num_rqst = 0;
645 SMB2_open_free(&rqst[num_rqst++]);
646 if (rc == -EREMCHG) {
647 pr_warn_once("server share %s deleted\n", tcon->tree_name);
648 tcon->need_reconnect = true;
649 }
650
651 tmp_rc = rc;
652
653 if (rc == 0 && num_cmds > 0 && cmds[0] == SMB2_OP_OPEN_QUERY) {
654 create_rsp = rsp_iov[0].iov_base;
655 idata = in_iov[0].iov_base;
656 idata->fi.CreationTime = create_rsp->CreationTime;
657 idata->fi.LastAccessTime = create_rsp->LastAccessTime;
658 idata->fi.LastWriteTime = create_rsp->LastWriteTime;
659 idata->fi.ChangeTime = create_rsp->ChangeTime;
660 idata->fi.Attributes = create_rsp->FileAttributes;
661 idata->fi.AllocationSize = create_rsp->AllocationSize;
662 idata->fi.EndOfFile = create_rsp->EndofFile;
663 if (le32_to_cpu(idata->fi.NumberOfLinks) == 0)
664 idata->fi.NumberOfLinks = cpu_to_le32(1); /* dummy value */
665 idata->fi.DeletePending = 0;
666 idata->fi.Directory = !!(le32_to_cpu(create_rsp->FileAttributes) & ATTR_DIRECTORY);
667
668 /* smb2_parse_contexts() fills idata->fi.IndexNumber */
669 rc = smb2_parse_contexts(server, &rsp_iov[0], &oparms->fid->epoch,
670 oparms->fid->lease_key, &oplock, &idata->fi, NULL);
671 if (rc)
672 cifs_dbg(VFS, "rc: %d parsing context of compound op\n", rc);
673 }
674
675 for (i = 0; i < num_cmds; i++) {
676 char *buf = rsp_iov[i + i].iov_base;
677
678 if (buf && resp_buftype[i + 1] != CIFS_NO_BUFFER)
679 rc = server->ops->map_error(buf, false);
680 else
681 rc = tmp_rc;
682 switch (cmds[i]) {
683 case SMB2_OP_QUERY_INFO:
684 idata = in_iov[i].iov_base;
685 idata->contains_posix_file_info = false;
686 if (rc == 0 && cfile && cfile->symlink_target) {
687 idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
688 if (!idata->symlink_target)
689 rc = -ENOMEM;
690 }
691 if (rc == 0) {
692 qi_rsp = (struct smb2_query_info_rsp *)
693 rsp_iov[i + 1].iov_base;
694 rc = smb2_validate_and_copy_iov(
695 le16_to_cpu(qi_rsp->OutputBufferOffset),
696 le32_to_cpu(qi_rsp->OutputBufferLength),
697 &rsp_iov[i + 1], sizeof(idata->fi), (char *)&idata->fi);
698 }
699 SMB2_query_info_free(&rqst[num_rqst++]);
700 if (rc)
701 trace_smb3_query_info_compound_err(xid, tcon->tid,
702 ses->Suid, rc);
703 else
704 trace_smb3_query_info_compound_done(xid, tcon->tid,
705 ses->Suid);
706 break;
707 case SMB2_OP_POSIX_QUERY_INFO:
708 idata = in_iov[i].iov_base;
709 idata->contains_posix_file_info = true;
710 if (rc == 0 && cfile && cfile->symlink_target) {
711 idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
712 if (!idata->symlink_target)
713 rc = -ENOMEM;
714 }
715 if (rc == 0) {
716 qi_rsp = (struct smb2_query_info_rsp *)
717 rsp_iov[i + 1].iov_base;
718 rc = smb2_validate_and_copy_iov(
719 le16_to_cpu(qi_rsp->OutputBufferOffset),
720 le32_to_cpu(qi_rsp->OutputBufferLength),
721 &rsp_iov[i + 1], sizeof(idata->posix_fi) /* add SIDs */,
722 (char *)&idata->posix_fi);
723 }
724 if (rc == 0)
725 rc = parse_posix_sids(idata, &rsp_iov[i + 1]);
726
727 SMB2_query_info_free(&rqst[num_rqst++]);
728 if (rc)
729 trace_smb3_posix_query_info_compound_err(xid, tcon->tid,
730 ses->Suid, rc);
731 else
732 trace_smb3_posix_query_info_compound_done(xid, tcon->tid,
733 ses->Suid);
734 break;
735 case SMB2_OP_DELETE:
736 if (rc)
737 trace_smb3_delete_err(xid, tcon->tid, ses->Suid, rc);
738 else {
739 /*
740 * If dentry (hence, inode) is NULL, lease break is going to
741 * take care of degrading leases on handles for deleted files.
742 */
743 if (inode)
744 cifs_mark_open_handles_for_deleted_file(inode, full_path);
745 trace_smb3_delete_done(xid, tcon->tid, ses->Suid);
746 }
747 break;
748 case SMB2_OP_MKDIR:
749 if (rc)
750 trace_smb3_mkdir_err(xid, tcon->tid, ses->Suid, rc);
751 else
752 trace_smb3_mkdir_done(xid, tcon->tid, ses->Suid);
753 break;
754 case SMB2_OP_HARDLINK:
755 if (rc)
756 trace_smb3_hardlink_err(xid, tcon->tid, ses->Suid, rc);
757 else
758 trace_smb3_hardlink_done(xid, tcon->tid, ses->Suid);
759 SMB2_set_info_free(&rqst[num_rqst++]);
760 break;
761 case SMB2_OP_RENAME:
762 if (rc)
763 trace_smb3_rename_err(xid, tcon->tid, ses->Suid, rc);
764 else
765 trace_smb3_rename_done(xid, tcon->tid, ses->Suid);
766 SMB2_set_info_free(&rqst[num_rqst++]);
767 break;
768 case SMB2_OP_RMDIR:
769 if (rc)
770 trace_smb3_rmdir_err(xid, tcon->tid, ses->Suid, rc);
771 else
772 trace_smb3_rmdir_done(xid, tcon->tid, ses->Suid);
773 SMB2_set_info_free(&rqst[num_rqst++]);
774 break;
775 case SMB2_OP_SET_EOF:
776 if (rc)
777 trace_smb3_set_eof_err(xid, tcon->tid, ses->Suid, rc);
778 else
779 trace_smb3_set_eof_done(xid, tcon->tid, ses->Suid);
780 SMB2_set_info_free(&rqst[num_rqst++]);
781 break;
782 case SMB2_OP_SET_INFO:
783 if (rc)
784 trace_smb3_set_info_compound_err(xid, tcon->tid,
785 ses->Suid, rc);
786 else
787 trace_smb3_set_info_compound_done(xid, tcon->tid,
788 ses->Suid);
789 SMB2_set_info_free(&rqst[num_rqst++]);
790 break;
791 case SMB2_OP_SET_REPARSE:
792 if (rc) {
793 trace_smb3_set_reparse_compound_err(xid, tcon->tid,
794 ses->Suid, rc);
795 } else {
796 trace_smb3_set_reparse_compound_done(xid, tcon->tid,
797 ses->Suid);
798 }
799 SMB2_ioctl_free(&rqst[num_rqst++]);
800 break;
801 case SMB2_OP_GET_REPARSE:
802 if (!rc) {
803 iov = &rsp_iov[i + 1];
804 idata = in_iov[i].iov_base;
805 idata->reparse.io.iov = *iov;
806 idata->reparse.io.buftype = resp_buftype[i + 1];
807 idata->contains_posix_file_info = false; /* BB VERIFY */
808 rbuf = reparse_buf_ptr(iov);
809 if (IS_ERR(rbuf)) {
810 rc = PTR_ERR(rbuf);
811 trace_smb3_get_reparse_compound_err(xid, tcon->tid,
812 ses->Suid, rc);
813 } else {
814 idata->reparse.tag = le32_to_cpu(rbuf->ReparseTag);
815 trace_smb3_get_reparse_compound_done(xid, tcon->tid,
816 ses->Suid);
817 }
818 memset(iov, 0, sizeof(*iov));
819 resp_buftype[i + 1] = CIFS_NO_BUFFER;
820 } else {
821 trace_smb3_get_reparse_compound_err(xid, tcon->tid,
822 ses->Suid, rc);
823 }
824 SMB2_ioctl_free(&rqst[num_rqst++]);
825 break;
826 case SMB2_OP_QUERY_WSL_EA:
827 if (!rc) {
828 idata = in_iov[i].iov_base;
829 idata->contains_posix_file_info = false;
830 qi_rsp = rsp_iov[i + 1].iov_base;
831 data[0] = (u8 *)qi_rsp + le16_to_cpu(qi_rsp->OutputBufferOffset);
832 size[0] = le32_to_cpu(qi_rsp->OutputBufferLength);
833 rc = check_wsl_eas(&rsp_iov[i + 1]);
834 if (!rc) {
835 memcpy(idata->wsl.eas, data[0], size[0]);
836 idata->wsl.eas_len = size[0];
837 }
838 }
839 if (!rc) {
840 trace_smb3_query_wsl_ea_compound_done(xid, tcon->tid,
841 ses->Suid);
842 } else {
843 trace_smb3_query_wsl_ea_compound_err(xid, tcon->tid,
844 ses->Suid, rc);
845 }
846 SMB2_query_info_free(&rqst[num_rqst++]);
847 break;
848 }
849 }
850 SMB2_close_free(&rqst[num_rqst]);
851 rc = tmp_rc;
852
853 num_cmds += 2;
854 if (out_iov && out_buftype) {
855 memcpy(out_iov, rsp_iov, num_cmds * sizeof(*out_iov));
856 memcpy(out_buftype, resp_buftype,
857 num_cmds * sizeof(*out_buftype));
858 } else {
859 for (i = 0; i < num_cmds; i++)
860 free_rsp_buf(resp_buftype[i], rsp_iov[i].iov_base);
861 }
862 num_cmds -= 2; /* correct num_cmds as there could be a retry */
863 kfree(vars);
864
865 if (is_replayable_error(rc) &&
866 smb2_should_replay(tcon, &retries, &cur_sleep))
867 goto replay_again;
868
869 out:
870 if (cfile)
871 cifsFileInfo_put(cfile);
872
873 return rc;
874 }
875
parse_create_response(struct cifs_open_info_data * data,struct cifs_sb_info * cifs_sb,const char * full_path,const struct kvec * iov)876 static int parse_create_response(struct cifs_open_info_data *data,
877 struct cifs_sb_info *cifs_sb,
878 const char *full_path,
879 const struct kvec *iov)
880 {
881 struct smb2_create_rsp *rsp = iov->iov_base;
882 bool reparse_point = false;
883 u32 tag = 0;
884 int rc = 0;
885
886 switch (rsp->hdr.Status) {
887 case STATUS_IO_REPARSE_TAG_NOT_HANDLED:
888 reparse_point = true;
889 break;
890 case STATUS_STOPPED_ON_SYMLINK:
891 rc = smb2_parse_symlink_response(cifs_sb, iov,
892 full_path,
893 &data->symlink_target);
894 if (rc)
895 return rc;
896 tag = IO_REPARSE_TAG_SYMLINK;
897 reparse_point = true;
898 break;
899 case STATUS_SUCCESS:
900 reparse_point = !!(rsp->Flags & SMB2_CREATE_FLAG_REPARSEPOINT);
901 break;
902 }
903 data->reparse_point = reparse_point;
904 data->reparse.tag = tag;
905 return rc;
906 }
907
908 /* 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)909 static bool ea_unsupported(int *cmds, int num_cmds,
910 struct kvec *out_iov, int *out_buftype)
911 {
912 int i;
913
914 if (cmds[num_cmds - 1] != SMB2_OP_QUERY_WSL_EA)
915 return false;
916
917 for (i = 1; i < num_cmds - 1; i++) {
918 struct smb2_hdr *hdr = out_iov[i].iov_base;
919
920 if (out_buftype[i] == CIFS_NO_BUFFER || !hdr ||
921 hdr->Status != STATUS_SUCCESS)
922 return false;
923 }
924 return true;
925 }
926
free_rsp_iov(struct kvec * iovs,int * buftype,int count)927 static inline void free_rsp_iov(struct kvec *iovs, int *buftype, int count)
928 {
929 int i;
930
931 for (i = 0; i < count; i++) {
932 free_rsp_buf(buftype[i], iovs[i].iov_base);
933 memset(&iovs[i], 0, sizeof(*iovs));
934 buftype[i] = CIFS_NO_BUFFER;
935 }
936 }
937
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)938 int smb2_query_path_info(const unsigned int xid,
939 struct cifs_tcon *tcon,
940 struct cifs_sb_info *cifs_sb,
941 const char *full_path,
942 struct cifs_open_info_data *data)
943 {
944 struct kvec in_iov[3], out_iov[5] = {};
945 struct cached_fid *cfid = NULL;
946 struct cifs_open_parms oparms;
947 struct cifsFileInfo *cfile;
948 __u32 create_options = 0;
949 int out_buftype[5] = {};
950 struct smb2_hdr *hdr;
951 int num_cmds = 0;
952 int cmds[3];
953 bool islink;
954 int rc, rc2;
955
956 data->adjust_tz = false;
957 data->reparse_point = false;
958
959 /*
960 * BB TODO: Add support for using cached root handle in SMB3.1.1 POSIX.
961 * Create SMB2_query_posix_info worker function to do non-compounded
962 * query when we already have an open file handle for this. For now this
963 * is fast enough (always using the compounded version).
964 */
965 if (!tcon->posix_extensions) {
966 if (*full_path) {
967 rc = -ENOENT;
968 } else {
969 rc = open_cached_dir(xid, tcon, full_path,
970 cifs_sb, false, &cfid);
971 }
972 /* If it is a root and its handle is cached then use it */
973 if (!rc) {
974 if (cfid->file_all_info_is_valid) {
975 memcpy(&data->fi, &cfid->file_all_info,
976 sizeof(data->fi));
977 } else {
978 rc = SMB2_query_info(xid, tcon,
979 cfid->fid.persistent_fid,
980 cfid->fid.volatile_fid,
981 &data->fi);
982 }
983 close_cached_dir(cfid);
984 return rc;
985 }
986 cmds[num_cmds++] = SMB2_OP_QUERY_INFO;
987 } else {
988 cmds[num_cmds++] = SMB2_OP_POSIX_QUERY_INFO;
989 }
990
991 in_iov[0].iov_base = data;
992 in_iov[0].iov_len = sizeof(*data);
993 in_iov[1] = in_iov[0];
994 in_iov[2] = in_iov[0];
995
996 cifs_get_readable_path(tcon, full_path, &cfile);
997 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, FILE_READ_ATTRIBUTES,
998 FILE_OPEN, create_options, ACL_NO_MODE);
999 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
1000 &oparms, in_iov, cmds, num_cmds,
1001 cfile, out_iov, out_buftype, NULL);
1002 hdr = out_iov[0].iov_base;
1003 /*
1004 * If first iov is unset, then SMB session was dropped or we've got a
1005 * cached open file (@cfile).
1006 */
1007 if (!hdr || out_buftype[0] == CIFS_NO_BUFFER)
1008 goto out;
1009
1010 switch (rc) {
1011 case 0:
1012 rc = parse_create_response(data, cifs_sb, full_path, &out_iov[0]);
1013 break;
1014 case -EACCES:
1015 /*
1016 * If SMB2_OP_QUERY_INFO (called when POSIX extensions are not used) failed with
1017 * STATUS_ACCESS_DENIED then it means that caller does not have permission to
1018 * open the path with FILE_READ_ATTRIBUTES access and therefore cannot issue
1019 * SMB2_OP_QUERY_INFO command.
1020 *
1021 * There is an alternative way how to query limited information about path but still
1022 * suitable for stat() syscall. SMB2 OPEN/CREATE operation returns in its successful
1023 * response subset of query information.
1024 *
1025 * So try to open the path without FILE_READ_ATTRIBUTES but with MAXIMUM_ALLOWED
1026 * access which will grant the maximum possible access to the file and the response
1027 * will contain required query information for stat() syscall.
1028 */
1029
1030 if (tcon->posix_extensions)
1031 break;
1032
1033 num_cmds = 1;
1034 cmds[0] = SMB2_OP_OPEN_QUERY;
1035 in_iov[0].iov_base = data;
1036 in_iov[0].iov_len = sizeof(*data);
1037 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, MAXIMUM_ALLOWED,
1038 FILE_OPEN, create_options, ACL_NO_MODE);
1039 free_rsp_iov(out_iov, out_buftype, ARRAY_SIZE(out_iov));
1040 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
1041 &oparms, in_iov, cmds, num_cmds,
1042 cfile, out_iov, out_buftype, NULL);
1043
1044 hdr = out_iov[0].iov_base;
1045 if (!hdr || out_buftype[0] == CIFS_NO_BUFFER)
1046 goto out;
1047
1048 if (!rc)
1049 rc = parse_create_response(data, cifs_sb, full_path, &out_iov[0]);
1050 break;
1051 case -EOPNOTSUPP:
1052 /*
1053 * BB TODO: When support for special files added to Samba
1054 * re-verify this path.
1055 */
1056 rc = parse_create_response(data, cifs_sb, full_path, &out_iov[0]);
1057 if (rc || !data->reparse_point)
1058 goto out;
1059
1060 /*
1061 * Skip SMB2_OP_GET_REPARSE if symlink already parsed in create
1062 * response.
1063 */
1064 if (data->reparse.tag != IO_REPARSE_TAG_SYMLINK) {
1065 cmds[num_cmds++] = SMB2_OP_GET_REPARSE;
1066 if (!tcon->posix_extensions)
1067 cmds[num_cmds++] = SMB2_OP_QUERY_WSL_EA;
1068 }
1069
1070 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path,
1071 FILE_READ_ATTRIBUTES |
1072 FILE_READ_EA | SYNCHRONIZE,
1073 FILE_OPEN, create_options |
1074 OPEN_REPARSE_POINT, ACL_NO_MODE);
1075 cifs_get_readable_path(tcon, full_path, &cfile);
1076 free_rsp_iov(out_iov, out_buftype, ARRAY_SIZE(out_iov));
1077 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
1078 &oparms, in_iov, cmds, num_cmds,
1079 cfile, out_iov, out_buftype, NULL);
1080 if (rc && ea_unsupported(cmds, num_cmds,
1081 out_iov, out_buftype)) {
1082 if (data->reparse.tag != IO_REPARSE_TAG_LX_BLK &&
1083 data->reparse.tag != IO_REPARSE_TAG_LX_CHR)
1084 rc = 0;
1085 else
1086 rc = -EOPNOTSUPP;
1087 }
1088
1089 if (data->reparse.tag == IO_REPARSE_TAG_SYMLINK && !rc) {
1090 bool directory = le32_to_cpu(data->fi.Attributes) & ATTR_DIRECTORY;
1091 rc = smb2_fix_symlink_target_type(&data->symlink_target, directory, cifs_sb);
1092 }
1093 break;
1094 case -EREMOTE:
1095 break;
1096 default:
1097 if (hdr->Status != STATUS_OBJECT_NAME_INVALID)
1098 break;
1099 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb,
1100 full_path, &islink);
1101 if (rc2) {
1102 rc = rc2;
1103 goto out;
1104 }
1105 if (islink)
1106 rc = -EREMOTE;
1107 }
1108
1109 out:
1110 free_rsp_iov(out_iov, out_buftype, ARRAY_SIZE(out_iov));
1111 return rc;
1112 }
1113
1114 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)1115 smb2_mkdir(const unsigned int xid, struct inode *parent_inode, umode_t mode,
1116 struct cifs_tcon *tcon, const char *name,
1117 struct cifs_sb_info *cifs_sb)
1118 {
1119 struct cifs_open_parms oparms;
1120
1121 oparms = CIFS_OPARMS(cifs_sb, tcon, name, FILE_WRITE_ATTRIBUTES,
1122 FILE_CREATE, CREATE_NOT_FILE, mode);
1123 return smb2_compound_op(xid, tcon, cifs_sb,
1124 name, &oparms, NULL,
1125 &(int){SMB2_OP_MKDIR}, 1,
1126 NULL, NULL, NULL, NULL);
1127 }
1128
1129 void
smb2_mkdir_setinfo(struct inode * inode,const char * name,struct cifs_sb_info * cifs_sb,struct cifs_tcon * tcon,const unsigned int xid)1130 smb2_mkdir_setinfo(struct inode *inode, const char *name,
1131 struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
1132 const unsigned int xid)
1133 {
1134 struct cifs_open_parms oparms;
1135 FILE_BASIC_INFO data = {};
1136 struct cifsInodeInfo *cifs_i;
1137 struct cifsFileInfo *cfile;
1138 struct kvec in_iov;
1139 u32 dosattrs;
1140 int tmprc;
1141
1142 in_iov.iov_base = &data;
1143 in_iov.iov_len = sizeof(data);
1144 cifs_i = CIFS_I(inode);
1145 dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
1146 data.Attributes = cpu_to_le32(dosattrs);
1147 cifs_get_writable_path(tcon, name, FIND_WR_ANY, &cfile);
1148 oparms = CIFS_OPARMS(cifs_sb, tcon, name, FILE_WRITE_ATTRIBUTES,
1149 FILE_CREATE, CREATE_NOT_FILE, ACL_NO_MODE);
1150 tmprc = smb2_compound_op(xid, tcon, cifs_sb, name,
1151 &oparms, &in_iov,
1152 &(int){SMB2_OP_SET_INFO}, 1,
1153 cfile, NULL, NULL, NULL);
1154 if (tmprc == 0)
1155 cifs_i->cifsAttrs = dosattrs;
1156 }
1157
1158 int
smb2_rmdir(const unsigned int xid,struct cifs_tcon * tcon,const char * name,struct cifs_sb_info * cifs_sb)1159 smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
1160 struct cifs_sb_info *cifs_sb)
1161 {
1162 struct cifs_open_parms oparms;
1163
1164 drop_cached_dir_by_name(xid, tcon, name, cifs_sb);
1165 oparms = CIFS_OPARMS(cifs_sb, tcon, name, DELETE,
1166 FILE_OPEN, CREATE_NOT_FILE, ACL_NO_MODE);
1167 return smb2_compound_op(xid, tcon, cifs_sb,
1168 name, &oparms, NULL,
1169 &(int){SMB2_OP_RMDIR}, 1,
1170 NULL, NULL, NULL, NULL);
1171 }
1172
1173 int
smb2_unlink(const unsigned int xid,struct cifs_tcon * tcon,const char * name,struct cifs_sb_info * cifs_sb,struct dentry * dentry)1174 smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
1175 struct cifs_sb_info *cifs_sb, struct dentry *dentry)
1176 {
1177 struct cifs_open_parms oparms;
1178
1179 oparms = CIFS_OPARMS(cifs_sb, tcon, name,
1180 DELETE, FILE_OPEN,
1181 CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
1182 ACL_NO_MODE);
1183 int rc = smb2_compound_op(xid, tcon, cifs_sb, name, &oparms,
1184 NULL, &(int){SMB2_OP_DELETE}, 1,
1185 NULL, NULL, NULL, dentry);
1186 if (rc == -EINVAL) {
1187 cifs_dbg(FYI, "invalid lease key, resending request without lease");
1188 rc = smb2_compound_op(xid, tcon, cifs_sb, name, &oparms,
1189 NULL, &(int){SMB2_OP_DELETE}, 1,
1190 NULL, NULL, NULL, NULL);
1191 }
1192 return rc;
1193 }
1194
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)1195 static int smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
1196 const char *from_name, const char *to_name,
1197 struct cifs_sb_info *cifs_sb,
1198 __u32 create_options, __u32 access,
1199 int command, struct cifsFileInfo *cfile,
1200 struct dentry *dentry)
1201 {
1202 struct cifs_open_parms oparms;
1203 struct kvec in_iov;
1204 __le16 *smb2_to_name = NULL;
1205 int rc;
1206
1207 smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
1208 if (smb2_to_name == NULL) {
1209 rc = -ENOMEM;
1210 goto smb2_rename_path;
1211 }
1212 in_iov.iov_base = smb2_to_name;
1213 in_iov.iov_len = 2 * UniStrnlen((wchar_t *)smb2_to_name, PATH_MAX);
1214 oparms = CIFS_OPARMS(cifs_sb, tcon, from_name, access, FILE_OPEN,
1215 create_options, ACL_NO_MODE);
1216 rc = smb2_compound_op(xid, tcon, cifs_sb, from_name,
1217 &oparms, &in_iov, &command, 1,
1218 cfile, NULL, NULL, dentry);
1219 smb2_rename_path:
1220 kfree(smb2_to_name);
1221 return rc;
1222 }
1223
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)1224 int smb2_rename_path(const unsigned int xid,
1225 struct cifs_tcon *tcon,
1226 struct dentry *source_dentry,
1227 const char *from_name, const char *to_name,
1228 struct cifs_sb_info *cifs_sb)
1229 {
1230 struct cifsFileInfo *cfile;
1231 __u32 co = file_create_options(source_dentry);
1232
1233 drop_cached_dir_by_name(xid, tcon, from_name, cifs_sb);
1234 cifs_get_writable_path(tcon, from_name, FIND_WR_WITH_DELETE, &cfile);
1235
1236 int rc = smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
1237 co, DELETE, SMB2_OP_RENAME, cfile, source_dentry);
1238 if (rc == -EINVAL) {
1239 cifs_dbg(FYI, "invalid lease key, resending request without lease");
1240 cifs_get_writable_path(tcon, from_name,
1241 FIND_WR_WITH_DELETE, &cfile);
1242 rc = smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
1243 co, DELETE, SMB2_OP_RENAME, cfile, NULL);
1244 }
1245 return rc;
1246 }
1247
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)1248 int smb2_create_hardlink(const unsigned int xid,
1249 struct cifs_tcon *tcon,
1250 struct dentry *source_dentry,
1251 const char *from_name, const char *to_name,
1252 struct cifs_sb_info *cifs_sb)
1253 {
1254 __u32 co = file_create_options(source_dentry);
1255
1256 return smb2_set_path_attr(xid, tcon, from_name, to_name,
1257 cifs_sb, co, FILE_READ_ATTRIBUTES,
1258 SMB2_OP_HARDLINK, NULL, NULL);
1259 }
1260
1261 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)1262 smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
1263 const char *full_path, __u64 size,
1264 struct cifs_sb_info *cifs_sb, bool set_alloc,
1265 struct dentry *dentry)
1266 {
1267 struct cifs_open_parms oparms;
1268 struct cifsFileInfo *cfile;
1269 struct kvec in_iov;
1270 __le64 eof = cpu_to_le64(size);
1271 int rc;
1272
1273 in_iov.iov_base = &eof;
1274 in_iov.iov_len = sizeof(eof);
1275 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
1276
1277 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, FILE_WRITE_DATA,
1278 FILE_OPEN, 0, ACL_NO_MODE);
1279 rc = smb2_compound_op(xid, tcon, cifs_sb,
1280 full_path, &oparms, &in_iov,
1281 &(int){SMB2_OP_SET_EOF}, 1,
1282 cfile, NULL, NULL, dentry);
1283 if (rc == -EINVAL) {
1284 cifs_dbg(FYI, "invalid lease key, resending request without lease");
1285 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
1286 rc = smb2_compound_op(xid, tcon, cifs_sb,
1287 full_path, &oparms, &in_iov,
1288 &(int){SMB2_OP_SET_EOF}, 1,
1289 cfile, NULL, NULL, NULL);
1290 }
1291 return rc;
1292 }
1293
1294 int
smb2_set_file_info(struct inode * inode,const char * full_path,FILE_BASIC_INFO * buf,const unsigned int xid)1295 smb2_set_file_info(struct inode *inode, const char *full_path,
1296 FILE_BASIC_INFO *buf, const unsigned int xid)
1297 {
1298 struct cifs_open_parms oparms;
1299 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1300 struct tcon_link *tlink;
1301 struct cifs_tcon *tcon;
1302 struct cifsFileInfo *cfile;
1303 struct kvec in_iov = { .iov_base = buf, .iov_len = sizeof(*buf), };
1304 int rc;
1305
1306 if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
1307 (buf->LastWriteTime == 0) && (buf->ChangeTime == 0) &&
1308 (buf->Attributes == 0))
1309 return 0; /* would be a no op, no sense sending this */
1310
1311 tlink = cifs_sb_tlink(cifs_sb);
1312 if (IS_ERR(tlink))
1313 return PTR_ERR(tlink);
1314 tcon = tlink_tcon(tlink);
1315
1316 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
1317 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, FILE_WRITE_ATTRIBUTES,
1318 FILE_OPEN, 0, ACL_NO_MODE);
1319 rc = smb2_compound_op(xid, tcon, cifs_sb,
1320 full_path, &oparms, &in_iov,
1321 &(int){SMB2_OP_SET_INFO}, 1,
1322 cfile, NULL, NULL, NULL);
1323 cifs_put_tlink(tlink);
1324 return rc;
1325 }
1326
smb2_create_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)1327 struct inode *smb2_create_reparse_inode(struct cifs_open_info_data *data,
1328 struct super_block *sb,
1329 const unsigned int xid,
1330 struct cifs_tcon *tcon,
1331 const char *full_path,
1332 bool directory,
1333 struct kvec *reparse_iov,
1334 struct kvec *xattr_iov)
1335 {
1336 struct cifs_open_parms oparms;
1337 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
1338 struct cifsFileInfo *cfile;
1339 struct inode *new = NULL;
1340 int out_buftype[4] = {};
1341 struct kvec out_iov[4] = {};
1342 struct kvec in_iov[2];
1343 int cmds[2];
1344 int rc;
1345 int i;
1346
1347 /*
1348 * If server filesystem does not support reparse points then do not
1349 * attempt to create reparse point. This will prevent creating unusable
1350 * empty object on the server.
1351 */
1352 if (!CIFS_REPARSE_SUPPORT(tcon))
1353 return ERR_PTR(-EOPNOTSUPP);
1354
1355 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path,
1356 SYNCHRONIZE | DELETE |
1357 FILE_READ_ATTRIBUTES |
1358 FILE_WRITE_ATTRIBUTES,
1359 FILE_CREATE,
1360 (directory ? CREATE_NOT_FILE : CREATE_NOT_DIR) | OPEN_REPARSE_POINT,
1361 ACL_NO_MODE);
1362 if (xattr_iov)
1363 oparms.ea_cctx = xattr_iov;
1364
1365 cmds[0] = SMB2_OP_SET_REPARSE;
1366 in_iov[0] = *reparse_iov;
1367 in_iov[1].iov_base = data;
1368 in_iov[1].iov_len = sizeof(*data);
1369
1370 if (tcon->posix_extensions) {
1371 cmds[1] = SMB2_OP_POSIX_QUERY_INFO;
1372 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
1373 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, &oparms,
1374 in_iov, cmds, 2, cfile, out_iov, out_buftype, NULL);
1375 if (!rc) {
1376 rc = smb311_posix_get_inode_info(&new, full_path,
1377 data, sb, xid);
1378 }
1379 } else {
1380 cmds[1] = SMB2_OP_QUERY_INFO;
1381 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
1382 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, &oparms,
1383 in_iov, cmds, 2, cfile, out_iov, out_buftype, NULL);
1384 if (!rc) {
1385 rc = cifs_get_inode_info(&new, full_path,
1386 data, sb, xid, NULL);
1387 }
1388 }
1389
1390
1391 /*
1392 * If CREATE was successful but SMB2_OP_SET_REPARSE failed then
1393 * remove the intermediate object created by CREATE. Otherwise
1394 * empty object stay on the server when reparse call failed.
1395 */
1396 if (rc &&
1397 out_iov[0].iov_base != NULL && out_buftype[0] != CIFS_NO_BUFFER &&
1398 ((struct smb2_hdr *)out_iov[0].iov_base)->Status == STATUS_SUCCESS &&
1399 (out_iov[1].iov_base == NULL || out_buftype[1] == CIFS_NO_BUFFER ||
1400 ((struct smb2_hdr *)out_iov[1].iov_base)->Status != STATUS_SUCCESS))
1401 smb2_unlink(xid, tcon, full_path, cifs_sb, NULL);
1402
1403 for (i = 0; i < ARRAY_SIZE(out_buftype); i++)
1404 free_rsp_buf(out_buftype[i], out_iov[i].iov_base);
1405
1406 return rc ? ERR_PTR(rc) : new;
1407 }
1408
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)1409 int smb2_query_reparse_point(const unsigned int xid,
1410 struct cifs_tcon *tcon,
1411 struct cifs_sb_info *cifs_sb,
1412 const char *full_path,
1413 u32 *tag, struct kvec *rsp,
1414 int *rsp_buftype)
1415 {
1416 struct cifs_open_parms oparms;
1417 struct cifs_open_info_data data = {};
1418 struct cifsFileInfo *cfile;
1419 struct kvec in_iov = { .iov_base = &data, .iov_len = sizeof(data), };
1420 int rc;
1421
1422 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1423
1424 cifs_get_readable_path(tcon, full_path, &cfile);
1425 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path,
1426 FILE_READ_ATTRIBUTES | FILE_READ_EA | SYNCHRONIZE,
1427 FILE_OPEN, OPEN_REPARSE_POINT, ACL_NO_MODE);
1428 rc = smb2_compound_op(xid, tcon, cifs_sb,
1429 full_path, &oparms, &in_iov,
1430 &(int){SMB2_OP_GET_REPARSE}, 1,
1431 cfile, NULL, NULL, NULL);
1432 if (rc)
1433 goto out;
1434
1435 *tag = data.reparse.tag;
1436 *rsp = data.reparse.io.iov;
1437 *rsp_buftype = data.reparse.io.buftype;
1438 memset(&data.reparse.io.iov, 0, sizeof(data.reparse.io.iov));
1439 data.reparse.io.buftype = CIFS_NO_BUFFER;
1440 out:
1441 cifs_free_open_info(&data);
1442 return rc;
1443 }
1444