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23#include <linux/fs.h>
24#include <linux/stat.h>
25#include <linux/slab.h>
26#include <linux/pagemap.h>
27#include <asm/div64.h>
28#include "cifsfs.h"
29#include "cifspdu.h"
30#include "cifsglob.h"
31#include "cifsproto.h"
32#include "cifs_debug.h"
33#include "cifs_fs_sb.h"
34#include "cifs_unicode.h"
35#include "fscache.h"
36#include "smb2glob.h"
37#include "smb2pdu.h"
38#include "smb2proto.h"
39
40static void
41free_set_inf_compound(struct smb_rqst *rqst)
42{
43 if (rqst[1].rq_iov)
44 SMB2_set_info_free(&rqst[1]);
45 if (rqst[2].rq_iov)
46 SMB2_close_free(&rqst[2]);
47}
48
49
50static int
51smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
52 struct cifs_sb_info *cifs_sb, const char *full_path,
53 __u32 desired_access, __u32 create_disposition,
54 __u32 create_options, void *ptr, int command)
55{
56 int rc;
57 __le16 *utf16_path = NULL;
58 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
59 struct cifs_open_parms oparms;
60 struct cifs_fid fid;
61 struct cifs_ses *ses = tcon->ses;
62 int num_rqst = 0;
63 struct smb_rqst rqst[3];
64 int resp_buftype[3];
65 struct kvec rsp_iov[3];
66 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
67 struct kvec qi_iov[1];
68 struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
69 struct kvec close_iov[1];
70 struct smb2_query_info_rsp *qi_rsp = NULL;
71 int flags = 0;
72 __u8 delete_pending[8] = {1, 0, 0, 0, 0, 0, 0, 0};
73 unsigned int size[2];
74 void *data[2];
75 struct smb2_file_rename_info rename_info;
76 struct smb2_file_link_info link_info;
77 int len;
78
79 if (smb3_encryption_required(tcon))
80 flags |= CIFS_TRANSFORM_REQ;
81
82 memset(rqst, 0, sizeof(rqst));
83 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
84 memset(rsp_iov, 0, sizeof(rsp_iov));
85
86
87 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
88 if (!utf16_path)
89 return -ENOMEM;
90
91 oparms.tcon = tcon;
92 oparms.desired_access = desired_access;
93 oparms.disposition = create_disposition;
94 oparms.create_options = create_options;
95 if (backup_cred(cifs_sb))
96 oparms.create_options |= CREATE_OPEN_BACKUP_INTENT;
97 oparms.fid = &fid;
98 oparms.reconnect = false;
99
100 memset(&open_iov, 0, sizeof(open_iov));
101 rqst[num_rqst].rq_iov = open_iov;
102 rqst[num_rqst].rq_nvec = SMB2_CREATE_IOV_SIZE;
103 rc = SMB2_open_init(tcon, &rqst[num_rqst], &oplock, &oparms,
104 utf16_path);
105 kfree(utf16_path);
106 if (rc)
107 goto finished;
108
109 smb2_set_next_command(tcon, &rqst[num_rqst++]);
110
111
112 switch (command) {
113 case SMB2_OP_QUERY_INFO:
114 memset(&qi_iov, 0, sizeof(qi_iov));
115 rqst[num_rqst].rq_iov = qi_iov;
116 rqst[num_rqst].rq_nvec = 1;
117
118 rc = SMB2_query_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
119 COMPOUND_FID, FILE_ALL_INFORMATION,
120 SMB2_O_INFO_FILE, 0,
121 sizeof(struct smb2_file_all_info) +
122 PATH_MAX * 2, 0, NULL);
123 if (rc)
124 goto finished;
125 smb2_set_next_command(tcon, &rqst[num_rqst]);
126 smb2_set_related(&rqst[num_rqst++]);
127 trace_smb3_query_info_compound_enter(xid, ses->Suid, tcon->tid,
128 full_path);
129 break;
130 case SMB2_OP_DELETE:
131 trace_smb3_delete_enter(xid, ses->Suid, tcon->tid, full_path);
132 break;
133 case SMB2_OP_MKDIR:
134
135
136
137
138 trace_smb3_mkdir_enter(xid, ses->Suid, tcon->tid, full_path);
139 break;
140 case SMB2_OP_RMDIR:
141 memset(&si_iov, 0, sizeof(si_iov));
142 rqst[num_rqst].rq_iov = si_iov;
143 rqst[num_rqst].rq_nvec = 1;
144
145 size[0] = 1;
146 data[0] = &delete_pending[0];
147
148 rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
149 COMPOUND_FID, current->tgid,
150 FILE_DISPOSITION_INFORMATION,
151 SMB2_O_INFO_FILE, 0, data, size);
152 if (rc)
153 goto finished;
154 smb2_set_next_command(tcon, &rqst[num_rqst]);
155 smb2_set_related(&rqst[num_rqst++]);
156 trace_smb3_rmdir_enter(xid, ses->Suid, tcon->tid, full_path);
157 break;
158 case SMB2_OP_SET_EOF:
159 memset(&si_iov, 0, sizeof(si_iov));
160 rqst[num_rqst].rq_iov = si_iov;
161 rqst[num_rqst].rq_nvec = 1;
162
163 size[0] = 8;
164 data[0] = ptr;
165
166 rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
167 COMPOUND_FID, current->tgid,
168 FILE_END_OF_FILE_INFORMATION,
169 SMB2_O_INFO_FILE, 0, data, size);
170 if (rc)
171 goto finished;
172 smb2_set_next_command(tcon, &rqst[num_rqst]);
173 smb2_set_related(&rqst[num_rqst++]);
174 trace_smb3_set_eof_enter(xid, ses->Suid, tcon->tid, full_path);
175 break;
176 case SMB2_OP_SET_INFO:
177 memset(&si_iov, 0, sizeof(si_iov));
178 rqst[num_rqst].rq_iov = si_iov;
179 rqst[num_rqst].rq_nvec = 1;
180
181
182 size[0] = sizeof(FILE_BASIC_INFO);
183 data[0] = ptr;
184
185 rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
186 COMPOUND_FID, current->tgid,
187 FILE_BASIC_INFORMATION,
188 SMB2_O_INFO_FILE, 0, data, size);
189 if (rc)
190 goto finished;
191 smb2_set_next_command(tcon, &rqst[num_rqst]);
192 smb2_set_related(&rqst[num_rqst++]);
193 trace_smb3_set_info_compound_enter(xid, ses->Suid, tcon->tid,
194 full_path);
195 break;
196 case SMB2_OP_RENAME:
197 memset(&si_iov, 0, sizeof(si_iov));
198 rqst[num_rqst].rq_iov = si_iov;
199 rqst[num_rqst].rq_nvec = 2;
200
201 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
202
203 rename_info.ReplaceIfExists = 1;
204 rename_info.RootDirectory = 0;
205 rename_info.FileNameLength = cpu_to_le32(len);
206
207 size[0] = sizeof(struct smb2_file_rename_info);
208 data[0] = &rename_info;
209
210 size[1] = len + 2 ;
211 data[1] = (__le16 *)ptr;
212
213 rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
214 COMPOUND_FID, current->tgid,
215 FILE_RENAME_INFORMATION,
216 SMB2_O_INFO_FILE, 0, data, size);
217 if (rc)
218 goto finished;
219 smb2_set_next_command(tcon, &rqst[num_rqst]);
220 smb2_set_related(&rqst[num_rqst++]);
221 trace_smb3_rename_enter(xid, ses->Suid, tcon->tid, full_path);
222 break;
223 case SMB2_OP_HARDLINK:
224 memset(&si_iov, 0, sizeof(si_iov));
225 rqst[num_rqst].rq_iov = si_iov;
226 rqst[num_rqst].rq_nvec = 2;
227
228 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
229
230 link_info.ReplaceIfExists = 0;
231 link_info.RootDirectory = 0;
232 link_info.FileNameLength = cpu_to_le32(len);
233
234 size[0] = sizeof(struct smb2_file_link_info);
235 data[0] = &link_info;
236
237 size[1] = len + 2 ;
238 data[1] = (__le16 *)ptr;
239
240 rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
241 COMPOUND_FID, current->tgid,
242 FILE_LINK_INFORMATION,
243 SMB2_O_INFO_FILE, 0, data, size);
244 if (rc)
245 goto finished;
246 smb2_set_next_command(tcon, &rqst[num_rqst]);
247 smb2_set_related(&rqst[num_rqst++]);
248 trace_smb3_hardlink_enter(xid, ses->Suid, tcon->tid, full_path);
249 break;
250 default:
251 cifs_dbg(VFS, "Invalid command\n");
252 rc = -EINVAL;
253 }
254 if (rc)
255 goto finished;
256
257
258 memset(&close_iov, 0, sizeof(close_iov));
259 rqst[num_rqst].rq_iov = close_iov;
260 rqst[num_rqst].rq_nvec = 1;
261 rc = SMB2_close_init(tcon, &rqst[num_rqst], COMPOUND_FID,
262 COMPOUND_FID);
263 smb2_set_related(&rqst[num_rqst++]);
264 if (rc)
265 goto finished;
266
267 rc = compound_send_recv(xid, ses, flags, num_rqst, rqst,
268 resp_buftype, rsp_iov);
269
270 finished:
271 SMB2_open_free(&rqst[0]);
272 switch (command) {
273 case SMB2_OP_QUERY_INFO:
274 if (rc == 0) {
275 qi_rsp = (struct smb2_query_info_rsp *)
276 rsp_iov[1].iov_base;
277 rc = smb2_validate_and_copy_iov(
278 le16_to_cpu(qi_rsp->OutputBufferOffset),
279 le32_to_cpu(qi_rsp->OutputBufferLength),
280 &rsp_iov[1], sizeof(struct smb2_file_all_info),
281 ptr);
282 }
283 if (rqst[1].rq_iov)
284 SMB2_query_info_free(&rqst[1]);
285 if (rqst[2].rq_iov)
286 SMB2_close_free(&rqst[2]);
287 if (rc)
288 trace_smb3_query_info_compound_err(xid, ses->Suid,
289 tcon->tid, rc);
290 else
291 trace_smb3_query_info_compound_done(xid, ses->Suid,
292 tcon->tid);
293 break;
294 case SMB2_OP_DELETE:
295 if (rc)
296 trace_smb3_delete_err(xid, ses->Suid, tcon->tid, rc);
297 else
298 trace_smb3_delete_done(xid, ses->Suid, tcon->tid);
299 if (rqst[1].rq_iov)
300 SMB2_close_free(&rqst[1]);
301 break;
302 case SMB2_OP_MKDIR:
303 if (rc)
304 trace_smb3_mkdir_err(xid, ses->Suid, tcon->tid, rc);
305 else
306 trace_smb3_mkdir_done(xid, ses->Suid, tcon->tid);
307 if (rqst[1].rq_iov)
308 SMB2_close_free(&rqst[1]);
309 break;
310 case SMB2_OP_HARDLINK:
311 if (rc)
312 trace_smb3_hardlink_err(xid, ses->Suid, tcon->tid, rc);
313 else
314 trace_smb3_hardlink_done(xid, ses->Suid, tcon->tid);
315 free_set_inf_compound(rqst);
316 break;
317 case SMB2_OP_RENAME:
318 if (rc)
319 trace_smb3_rename_err(xid, ses->Suid, tcon->tid, rc);
320 else
321 trace_smb3_rename_done(xid, ses->Suid, tcon->tid);
322 free_set_inf_compound(rqst);
323 break;
324 case SMB2_OP_RMDIR:
325 if (rc)
326 trace_smb3_rmdir_err(xid, ses->Suid, tcon->tid, rc);
327 else
328 trace_smb3_rmdir_done(xid, ses->Suid, tcon->tid);
329 free_set_inf_compound(rqst);
330 break;
331 case SMB2_OP_SET_EOF:
332 if (rc)
333 trace_smb3_set_eof_err(xid, ses->Suid, tcon->tid, rc);
334 else
335 trace_smb3_set_eof_done(xid, ses->Suid, tcon->tid);
336 free_set_inf_compound(rqst);
337 break;
338 case SMB2_OP_SET_INFO:
339 if (rc)
340 trace_smb3_set_info_compound_err(xid, ses->Suid,
341 tcon->tid, rc);
342 else
343 trace_smb3_set_info_compound_done(xid, ses->Suid,
344 tcon->tid);
345 free_set_inf_compound(rqst);
346 break;
347 }
348 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
349 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
350 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
351 return rc;
352}
353
354void
355move_smb2_info_to_cifs(FILE_ALL_INFO *dst, struct smb2_file_all_info *src)
356{
357 memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src);
358 dst->CurrentByteOffset = src->CurrentByteOffset;
359 dst->Mode = src->Mode;
360 dst->AlignmentRequirement = src->AlignmentRequirement;
361 dst->IndexNumber1 = 0;
362}
363
364int
365smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
366 struct cifs_sb_info *cifs_sb, const char *full_path,
367 FILE_ALL_INFO *data, bool *adjust_tz, bool *symlink)
368{
369 int rc;
370 struct smb2_file_all_info *smb2_data;
371 __u32 create_options = 0;
372 struct cifs_fid fid;
373 bool no_cached_open = tcon->nohandlecache;
374
375 *adjust_tz = false;
376 *symlink = false;
377
378 smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
379 GFP_KERNEL);
380 if (smb2_data == NULL)
381 return -ENOMEM;
382
383
384 if (!strlen(full_path) && !no_cached_open) {
385 rc = open_shroot(xid, tcon, &fid);
386 if (rc)
387 goto out;
388
389 if (tcon->crfid.file_all_info_is_valid) {
390 move_smb2_info_to_cifs(data,
391 &tcon->crfid.file_all_info);
392 } else {
393 rc = SMB2_query_info(xid, tcon, fid.persistent_fid,
394 fid.volatile_fid, smb2_data);
395 if (!rc)
396 move_smb2_info_to_cifs(data, smb2_data);
397 }
398 close_shroot(&tcon->crfid);
399 goto out;
400 }
401
402 if (backup_cred(cifs_sb))
403 create_options |= CREATE_OPEN_BACKUP_INTENT;
404
405 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
406 FILE_READ_ATTRIBUTES, FILE_OPEN, create_options,
407 smb2_data, SMB2_OP_QUERY_INFO);
408 if (rc == -EOPNOTSUPP) {
409 *symlink = true;
410 create_options |= OPEN_REPARSE_POINT;
411
412
413 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
414 FILE_READ_ATTRIBUTES, FILE_OPEN,
415 create_options, smb2_data,
416 SMB2_OP_QUERY_INFO);
417 }
418 if (rc)
419 goto out;
420
421 move_smb2_info_to_cifs(data, smb2_data);
422out:
423 kfree(smb2_data);
424 return rc;
425}
426
427int
428smb2_mkdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
429 struct cifs_sb_info *cifs_sb)
430{
431 return smb2_compound_op(xid, tcon, cifs_sb, name,
432 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
433 CREATE_NOT_FILE, NULL, SMB2_OP_MKDIR);
434}
435
436void
437smb2_mkdir_setinfo(struct inode *inode, const char *name,
438 struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
439 const unsigned int xid)
440{
441 FILE_BASIC_INFO data;
442 struct cifsInodeInfo *cifs_i;
443 u32 dosattrs;
444 int tmprc;
445
446 memset(&data, 0, sizeof(data));
447 cifs_i = CIFS_I(inode);
448 dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
449 data.Attributes = cpu_to_le32(dosattrs);
450 tmprc = smb2_compound_op(xid, tcon, cifs_sb, name,
451 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
452 CREATE_NOT_FILE, &data, SMB2_OP_SET_INFO);
453 if (tmprc == 0)
454 cifs_i->cifsAttrs = dosattrs;
455}
456
457int
458smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
459 struct cifs_sb_info *cifs_sb)
460{
461 return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
462 CREATE_NOT_FILE,
463 NULL, SMB2_OP_RMDIR);
464}
465
466int
467smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
468 struct cifs_sb_info *cifs_sb)
469{
470 return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
471 CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
472 NULL, SMB2_OP_DELETE);
473}
474
475static int
476smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
477 const char *from_name, const char *to_name,
478 struct cifs_sb_info *cifs_sb, __u32 access, int command)
479{
480 __le16 *smb2_to_name = NULL;
481 int rc;
482
483 smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
484 if (smb2_to_name == NULL) {
485 rc = -ENOMEM;
486 goto smb2_rename_path;
487 }
488 rc = smb2_compound_op(xid, tcon, cifs_sb, from_name, access,
489 FILE_OPEN, 0, smb2_to_name, command);
490smb2_rename_path:
491 kfree(smb2_to_name);
492 return rc;
493}
494
495int
496smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
497 const char *from_name, const char *to_name,
498 struct cifs_sb_info *cifs_sb)
499{
500 return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
501 DELETE, SMB2_OP_RENAME);
502}
503
504int
505smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
506 const char *from_name, const char *to_name,
507 struct cifs_sb_info *cifs_sb)
508{
509 return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
510 FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK);
511}
512
513int
514smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
515 const char *full_path, __u64 size,
516 struct cifs_sb_info *cifs_sb, bool set_alloc)
517{
518 __le64 eof = cpu_to_le64(size);
519
520 return smb2_compound_op(xid, tcon, cifs_sb, full_path,
521 FILE_WRITE_DATA, FILE_OPEN, 0, &eof,
522 SMB2_OP_SET_EOF);
523}
524
525int
526smb2_set_file_info(struct inode *inode, const char *full_path,
527 FILE_BASIC_INFO *buf, const unsigned int xid)
528{
529 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
530 struct tcon_link *tlink;
531 int rc;
532
533 if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
534 (buf->LastWriteTime == 0) && (buf->ChangeTime == 0) &&
535 (buf->Attributes == 0))
536 return 0;
537
538 tlink = cifs_sb_tlink(cifs_sb);
539 if (IS_ERR(tlink))
540 return PTR_ERR(tlink);
541
542 rc = smb2_compound_op(xid, tlink_tcon(tlink), cifs_sb, full_path,
543 FILE_WRITE_ATTRIBUTES, FILE_OPEN, 0, buf,
544 SMB2_OP_SET_INFO);
545 cifs_put_tlink(tlink);
546 return rc;
547}
548
