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f4415848 NJ |
1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* | |
3 | * Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org> | |
4 | * Copyright (C) 2018 Samsung Electronics Co., Ltd. | |
5 | */ | |
6 | ||
7 | #include <linux/kernel.h> | |
8 | #include <linux/fs.h> | |
9 | #include <linux/uaccess.h> | |
10 | #include <linux/backing-dev.h> | |
11 | #include <linux/writeback.h> | |
f4415848 NJ |
12 | #include <linux/xattr.h> |
13 | #include <linux/falloc.h> | |
14 | #include <linux/genhd.h> | |
15 | #include <linux/blkdev.h> | |
16 | #include <linux/fsnotify.h> | |
17 | #include <linux/dcache.h> | |
18 | #include <linux/slab.h> | |
19 | #include <linux/vmalloc.h> | |
20 | #include <linux/sched/xacct.h> | |
21 | #include <linux/crc32c.h> | |
22 | ||
23 | #include "glob.h" | |
24 | #include "oplock.h" | |
25 | #include "connection.h" | |
26 | #include "buffer_pool.h" | |
27 | #include "vfs.h" | |
28 | #include "vfs_cache.h" | |
29 | #include "smbacl.h" | |
30 | #include "ndr.h" | |
31 | #include "auth.h" | |
5626518e | 32 | #include "misc.h" |
f4415848 | 33 | |
f4415848 NJ |
34 | #include "smb_common.h" |
35 | #include "mgmt/share_config.h" | |
36 | #include "mgmt/tree_connect.h" | |
37 | #include "mgmt/user_session.h" | |
38 | #include "mgmt/user_config.h" | |
39 | ||
40 | static char *extract_last_component(char *path) | |
41 | { | |
42 | char *p = strrchr(path, '/'); | |
43 | ||
44 | if (p && p[1] != '\0') { | |
45 | *p = '\0'; | |
46 | p++; | |
47 | } else { | |
48 | p = NULL; | |
49 | ksmbd_err("Invalid path %s\n", path); | |
50 | } | |
51 | return p; | |
52 | } | |
53 | ||
f4415848 | 54 | static void ksmbd_vfs_inherit_owner(struct ksmbd_work *work, |
64b39f4a | 55 | struct inode *parent_inode, struct inode *inode) |
f4415848 NJ |
56 | { |
57 | if (!test_share_config_flag(work->tcon->share_conf, | |
64b39f4a | 58 | KSMBD_SHARE_FLAG_INHERIT_OWNER)) |
f4415848 NJ |
59 | return; |
60 | ||
61 | i_uid_write(inode, i_uid_read(parent_inode)); | |
62 | } | |
63 | ||
f4415848 NJ |
64 | int ksmbd_vfs_inode_permission(struct dentry *dentry, int acc_mode, bool delete) |
65 | { | |
ff1d5727 | 66 | int mask, ret = 0; |
f4415848 NJ |
67 | |
68 | mask = 0; | |
69 | acc_mode &= O_ACCMODE; | |
70 | ||
71 | if (acc_mode == O_RDONLY) | |
72 | mask = MAY_READ; | |
73 | else if (acc_mode == O_WRONLY) | |
74 | mask = MAY_WRITE; | |
75 | else if (acc_mode == O_RDWR) | |
76 | mask = MAY_READ | MAY_WRITE; | |
77 | ||
78 | if (inode_permission(&init_user_ns, d_inode(dentry), mask | MAY_OPEN)) | |
79 | return -EACCES; | |
80 | ||
81 | if (delete) { | |
ff1d5727 | 82 | struct dentry *child, *parent; |
f4415848 NJ |
83 | |
84 | parent = dget_parent(dentry); | |
ff1d5727 NJ |
85 | inode_lock_nested(d_inode(parent), I_MUTEX_PARENT); |
86 | child = lookup_one_len(dentry->d_name.name, parent, | |
87 | dentry->d_name.len); | |
88 | if (IS_ERR(child)) { | |
89 | ret = PTR_ERR(child); | |
90 | goto out_lock; | |
91 | } | |
92 | ||
93 | if (child != dentry) { | |
94 | ret = -ESTALE; | |
95 | dput(child); | |
96 | goto out_lock; | |
97 | } | |
98 | dput(child); | |
f4415848 NJ |
99 | |
100 | if (inode_permission(&init_user_ns, d_inode(parent), MAY_EXEC | MAY_WRITE)) { | |
ff1d5727 NJ |
101 | ret = -EACCES; |
102 | goto out_lock; | |
f4415848 | 103 | } |
ff1d5727 NJ |
104 | out_lock: |
105 | inode_unlock(d_inode(parent)); | |
f4415848 NJ |
106 | dput(parent); |
107 | } | |
ff1d5727 | 108 | return ret; |
f4415848 NJ |
109 | } |
110 | ||
111 | int ksmbd_vfs_query_maximal_access(struct dentry *dentry, __le32 *daccess) | |
112 | { | |
ff1d5727 NJ |
113 | struct dentry *parent, *child; |
114 | int ret = 0; | |
f4415848 NJ |
115 | |
116 | *daccess = cpu_to_le32(FILE_READ_ATTRIBUTES | READ_CONTROL); | |
117 | ||
118 | if (!inode_permission(&init_user_ns, d_inode(dentry), MAY_OPEN | MAY_WRITE)) | |
119 | *daccess |= cpu_to_le32(WRITE_DAC | WRITE_OWNER | SYNCHRONIZE | | |
120 | FILE_WRITE_DATA | FILE_APPEND_DATA | | |
121 | FILE_WRITE_EA | FILE_WRITE_ATTRIBUTES | | |
122 | FILE_DELETE_CHILD); | |
123 | ||
124 | if (!inode_permission(&init_user_ns, d_inode(dentry), MAY_OPEN | MAY_READ)) | |
125 | *daccess |= FILE_READ_DATA_LE | FILE_READ_EA_LE; | |
126 | ||
127 | if (!inode_permission(&init_user_ns, d_inode(dentry), MAY_OPEN | MAY_EXEC)) | |
128 | *daccess |= FILE_EXECUTE_LE; | |
129 | ||
130 | parent = dget_parent(dentry); | |
ff1d5727 NJ |
131 | inode_lock_nested(d_inode(parent), I_MUTEX_PARENT); |
132 | child = lookup_one_len(dentry->d_name.name, parent, | |
133 | dentry->d_name.len); | |
134 | if (IS_ERR(child)) { | |
135 | ret = PTR_ERR(child); | |
136 | goto out_lock; | |
137 | } | |
138 | ||
139 | if (child != dentry) { | |
140 | ret = -ESTALE; | |
141 | dput(child); | |
142 | goto out_lock; | |
143 | } | |
144 | dput(child); | |
f4415848 NJ |
145 | |
146 | if (!inode_permission(&init_user_ns, d_inode(parent), MAY_EXEC | MAY_WRITE)) | |
147 | *daccess |= FILE_DELETE_LE; | |
ff1d5727 NJ |
148 | |
149 | out_lock: | |
150 | inode_unlock(d_inode(parent)); | |
f4415848 | 151 | dput(parent); |
ff1d5727 | 152 | return ret; |
f4415848 NJ |
153 | } |
154 | ||
f4415848 NJ |
155 | /** |
156 | * ksmbd_vfs_create() - vfs helper for smb create file | |
157 | * @work: work | |
158 | * @name: file name | |
159 | * @mode: file create mode | |
160 | * | |
161 | * Return: 0 on success, otherwise error | |
162 | */ | |
64b39f4a | 163 | int ksmbd_vfs_create(struct ksmbd_work *work, const char *name, umode_t mode) |
f4415848 NJ |
164 | { |
165 | struct path path; | |
166 | struct dentry *dentry; | |
167 | int err; | |
168 | ||
169 | dentry = kern_path_create(AT_FDCWD, name, &path, 0); | |
170 | if (IS_ERR(dentry)) { | |
171 | err = PTR_ERR(dentry); | |
172 | if (err != -ENOENT) | |
173 | ksmbd_err("path create failed for %s, err %d\n", | |
174 | name, err); | |
175 | return err; | |
176 | } | |
177 | ||
178 | mode |= S_IFREG; | |
179 | err = vfs_create(&init_user_ns, d_inode(path.dentry), dentry, mode, true); | |
180 | if (!err) { | |
181 | ksmbd_vfs_inherit_owner(work, d_inode(path.dentry), | |
182 | d_inode(dentry)); | |
f4415848 NJ |
183 | } else { |
184 | ksmbd_err("File(%s): creation failed (err:%d)\n", name, err); | |
185 | } | |
186 | done_path_create(&path, dentry); | |
187 | return err; | |
188 | } | |
189 | ||
190 | /** | |
191 | * ksmbd_vfs_mkdir() - vfs helper for smb create directory | |
192 | * @work: work | |
193 | * @name: directory name | |
194 | * @mode: directory create mode | |
195 | * | |
196 | * Return: 0 on success, otherwise error | |
197 | */ | |
64b39f4a | 198 | int ksmbd_vfs_mkdir(struct ksmbd_work *work, const char *name, umode_t mode) |
f4415848 NJ |
199 | { |
200 | struct path path; | |
201 | struct dentry *dentry; | |
202 | int err; | |
203 | ||
204 | dentry = kern_path_create(AT_FDCWD, name, &path, LOOKUP_DIRECTORY); | |
205 | if (IS_ERR(dentry)) { | |
206 | err = PTR_ERR(dentry); | |
207 | if (err != -EEXIST) | |
208 | ksmbd_debug(VFS, "path create failed for %s, err %d\n", | |
209 | name, err); | |
210 | return err; | |
211 | } | |
212 | ||
213 | mode |= S_IFDIR; | |
214 | err = vfs_mkdir(&init_user_ns, d_inode(path.dentry), dentry, mode); | |
16370235 HL |
215 | if (err) |
216 | goto out; | |
217 | else if (d_unhashed(dentry)) { | |
218 | struct dentry *d; | |
219 | ||
220 | d = lookup_one_len(dentry->d_name.name, | |
221 | dentry->d_parent, | |
222 | dentry->d_name.len); | |
223 | if (IS_ERR(d)) { | |
224 | err = PTR_ERR(d); | |
225 | goto out; | |
226 | } | |
227 | if (unlikely(d_is_negative(d))) { | |
228 | dput(d); | |
229 | err = -ENOENT; | |
230 | goto out; | |
231 | } | |
232 | ||
f4415848 | 233 | ksmbd_vfs_inherit_owner(work, d_inode(path.dentry), |
16370235 HL |
234 | d_inode(d)); |
235 | dput(d); | |
64b39f4a | 236 | } |
16370235 | 237 | out: |
f4415848 | 238 | done_path_create(&path, dentry); |
16370235 HL |
239 | if (err) |
240 | ksmbd_err("mkdir(%s): creation failed (err:%d)\n", name, err); | |
f4415848 NJ |
241 | return err; |
242 | } | |
243 | ||
64b39f4a NJ |
244 | static ssize_t ksmbd_vfs_getcasexattr(struct dentry *dentry, char *attr_name, |
245 | int attr_name_len, char **attr_value) | |
f4415848 NJ |
246 | { |
247 | char *name, *xattr_list = NULL; | |
248 | ssize_t value_len = -ENOENT, xattr_list_len; | |
249 | ||
250 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
251 | if (xattr_list_len <= 0) | |
252 | goto out; | |
253 | ||
254 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
255 | name += strlen(name) + 1) { | |
256 | ksmbd_debug(VFS, "%s, len %zd\n", name, strlen(name)); | |
257 | if (strncasecmp(attr_name, name, attr_name_len)) | |
258 | continue; | |
259 | ||
260 | value_len = ksmbd_vfs_getxattr(dentry, | |
261 | name, | |
262 | attr_value); | |
263 | if (value_len < 0) | |
264 | ksmbd_err("failed to get xattr in file\n"); | |
265 | break; | |
266 | } | |
267 | ||
268 | out: | |
79f6b11a | 269 | kvfree(xattr_list); |
f4415848 NJ |
270 | return value_len; |
271 | } | |
272 | ||
273 | static int ksmbd_vfs_stream_read(struct ksmbd_file *fp, char *buf, loff_t *pos, | |
64b39f4a | 274 | size_t count) |
f4415848 NJ |
275 | { |
276 | ssize_t v_len; | |
277 | char *stream_buf = NULL; | |
278 | int err; | |
279 | ||
280 | ksmbd_debug(VFS, "read stream data pos : %llu, count : %zd\n", | |
281 | *pos, count); | |
282 | ||
283 | v_len = ksmbd_vfs_getcasexattr(fp->filp->f_path.dentry, | |
284 | fp->stream.name, | |
285 | fp->stream.size, | |
286 | &stream_buf); | |
287 | if (v_len == -ENOENT) { | |
288 | ksmbd_err("not found stream in xattr : %zd\n", v_len); | |
289 | err = -ENOENT; | |
290 | return err; | |
291 | } | |
292 | ||
293 | memcpy(buf, &stream_buf[*pos], count); | |
294 | return v_len > count ? count : v_len; | |
295 | } | |
296 | ||
297 | /** | |
298 | * check_lock_range() - vfs helper for smb byte range file locking | |
299 | * @filp: the file to apply the lock to | |
300 | * @start: lock start byte offset | |
301 | * @end: lock end byte offset | |
302 | * @type: byte range type read/write | |
303 | * | |
304 | * Return: 0 on success, otherwise error | |
305 | */ | |
64b39f4a NJ |
306 | static int check_lock_range(struct file *filp, loff_t start, loff_t end, |
307 | unsigned char type) | |
f4415848 NJ |
308 | { |
309 | struct file_lock *flock; | |
310 | struct file_lock_context *ctx = file_inode(filp)->i_flctx; | |
311 | int error = 0; | |
312 | ||
313 | if (!ctx || list_empty_careful(&ctx->flc_posix)) | |
314 | return 0; | |
315 | ||
316 | spin_lock(&ctx->flc_lock); | |
317 | list_for_each_entry(flock, &ctx->flc_posix, fl_list) { | |
318 | /* check conflict locks */ | |
319 | if (flock->fl_end >= start && end >= flock->fl_start) { | |
320 | if (flock->fl_type == F_RDLCK) { | |
321 | if (type == WRITE) { | |
322 | ksmbd_err("not allow write by shared lock\n"); | |
323 | error = 1; | |
324 | goto out; | |
325 | } | |
326 | } else if (flock->fl_type == F_WRLCK) { | |
327 | /* check owner in lock */ | |
328 | if (flock->fl_file != filp) { | |
329 | error = 1; | |
330 | ksmbd_err("not allow rw access by exclusive lock from other opens\n"); | |
331 | goto out; | |
332 | } | |
333 | } | |
334 | } | |
335 | } | |
336 | out: | |
337 | spin_unlock(&ctx->flc_lock); | |
338 | return error; | |
339 | } | |
340 | ||
341 | /** | |
342 | * ksmbd_vfs_read() - vfs helper for smb file read | |
343 | * @work: smb work | |
344 | * @fid: file id of open file | |
345 | * @count: read byte count | |
346 | * @pos: file pos | |
347 | * | |
348 | * Return: number of read bytes on success, otherwise error | |
349 | */ | |
64b39f4a | 350 | int ksmbd_vfs_read(struct ksmbd_work *work, struct ksmbd_file *fp, size_t count, |
f4415848 NJ |
351 | loff_t *pos) |
352 | { | |
353 | struct file *filp; | |
354 | ssize_t nbytes = 0; | |
96a34377 | 355 | char *rbuf; |
f4415848 | 356 | struct inode *inode; |
f4415848 | 357 | |
e5066499 | 358 | rbuf = work->aux_payload_buf; |
f4415848 | 359 | filp = fp->filp; |
d2f72ed8 | 360 | inode = file_inode(filp); |
f4415848 NJ |
361 | if (S_ISDIR(inode->i_mode)) |
362 | return -EISDIR; | |
363 | ||
364 | if (unlikely(count == 0)) | |
365 | return 0; | |
366 | ||
367 | if (work->conn->connection_type) { | |
368 | if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_EXECUTE_LE))) { | |
369 | ksmbd_err("no right to read(%s)\n", FP_FILENAME(fp)); | |
370 | return -EACCES; | |
371 | } | |
372 | } | |
373 | ||
374 | if (ksmbd_stream_fd(fp)) | |
375 | return ksmbd_vfs_stream_read(fp, rbuf, pos, count); | |
376 | ||
c36fca86 NJ |
377 | if (!work->tcon->posix_extensions) { |
378 | int ret; | |
379 | ||
380 | ret = check_lock_range(filp, *pos, *pos + count - 1, | |
381 | READ); | |
382 | if (ret) { | |
383 | ksmbd_err("unable to read due to lock\n"); | |
384 | return -EAGAIN; | |
385 | } | |
f4415848 NJ |
386 | } |
387 | ||
388 | nbytes = kernel_read(filp, rbuf, count, pos); | |
389 | if (nbytes < 0) { | |
f4415848 | 390 | ksmbd_err("smb read failed for (%s), err = %zd\n", |
96a34377 | 391 | fp->filename, nbytes); |
f4415848 NJ |
392 | return nbytes; |
393 | } | |
394 | ||
395 | filp->f_pos = *pos; | |
396 | return nbytes; | |
397 | } | |
398 | ||
399 | static int ksmbd_vfs_stream_write(struct ksmbd_file *fp, char *buf, loff_t *pos, | |
64b39f4a | 400 | size_t count) |
f4415848 NJ |
401 | { |
402 | char *stream_buf = NULL, *wbuf; | |
403 | size_t size, v_len; | |
404 | int err = 0; | |
405 | ||
406 | ksmbd_debug(VFS, "write stream data pos : %llu, count : %zd\n", | |
407 | *pos, count); | |
408 | ||
409 | size = *pos + count; | |
410 | if (size > XATTR_SIZE_MAX) { | |
411 | size = XATTR_SIZE_MAX; | |
412 | count = (*pos + count) - XATTR_SIZE_MAX; | |
413 | } | |
414 | ||
415 | v_len = ksmbd_vfs_getcasexattr(fp->filp->f_path.dentry, | |
416 | fp->stream.name, | |
417 | fp->stream.size, | |
418 | &stream_buf); | |
419 | if (v_len == -ENOENT) { | |
420 | ksmbd_err("not found stream in xattr : %zd\n", v_len); | |
421 | err = -ENOENT; | |
422 | goto out; | |
423 | } | |
424 | ||
425 | if (v_len < size) { | |
79f6b11a | 426 | wbuf = kvmalloc(size, GFP_KERNEL | __GFP_ZERO); |
f4415848 NJ |
427 | if (!wbuf) { |
428 | err = -ENOMEM; | |
429 | goto out; | |
430 | } | |
431 | ||
432 | if (v_len > 0) | |
433 | memcpy(wbuf, stream_buf, v_len); | |
434 | stream_buf = wbuf; | |
435 | } | |
436 | ||
437 | memcpy(&stream_buf[*pos], buf, count); | |
438 | ||
439 | err = ksmbd_vfs_setxattr(fp->filp->f_path.dentry, | |
440 | fp->stream.name, | |
441 | (void *)stream_buf, | |
442 | size, | |
443 | 0); | |
444 | if (err < 0) | |
445 | goto out; | |
446 | ||
447 | fp->filp->f_pos = *pos; | |
448 | err = 0; | |
449 | out: | |
79f6b11a | 450 | kvfree(stream_buf); |
f4415848 NJ |
451 | return err; |
452 | } | |
453 | ||
454 | /** | |
455 | * ksmbd_vfs_write() - vfs helper for smb file write | |
456 | * @work: work | |
457 | * @fid: file id of open file | |
458 | * @buf: buf containing data for writing | |
459 | * @count: read byte count | |
460 | * @pos: file pos | |
461 | * @sync: fsync after write | |
462 | * @written: number of bytes written | |
463 | * | |
464 | * Return: 0 on success, otherwise error | |
465 | */ | |
466 | int ksmbd_vfs_write(struct ksmbd_work *work, struct ksmbd_file *fp, | |
64b39f4a NJ |
467 | char *buf, size_t count, loff_t *pos, bool sync, |
468 | ssize_t *written) | |
f4415848 NJ |
469 | { |
470 | struct ksmbd_session *sess = work->sess; | |
471 | struct file *filp; | |
472 | loff_t offset = *pos; | |
473 | int err = 0; | |
474 | ||
475 | if (sess->conn->connection_type) { | |
476 | if (!(fp->daccess & FILE_WRITE_DATA_LE)) { | |
477 | ksmbd_err("no right to write(%s)\n", FP_FILENAME(fp)); | |
478 | err = -EACCES; | |
479 | goto out; | |
480 | } | |
481 | } | |
482 | ||
483 | filp = fp->filp; | |
484 | ||
485 | if (ksmbd_stream_fd(fp)) { | |
486 | err = ksmbd_vfs_stream_write(fp, buf, pos, count); | |
487 | if (!err) | |
488 | *written = count; | |
489 | goto out; | |
490 | } | |
491 | ||
c36fca86 NJ |
492 | if (!work->tcon->posix_extensions) { |
493 | err = check_lock_range(filp, *pos, *pos + count - 1, WRITE); | |
494 | if (err) { | |
495 | ksmbd_err("unable to write due to lock\n"); | |
496 | err = -EAGAIN; | |
497 | goto out; | |
498 | } | |
f4415848 NJ |
499 | } |
500 | ||
501 | /* Do we need to break any of a levelII oplock? */ | |
502 | smb_break_all_levII_oplock(work, fp, 1); | |
503 | ||
504 | err = kernel_write(filp, buf, count, pos); | |
505 | if (err < 0) { | |
506 | ksmbd_debug(VFS, "smb write failed, err = %d\n", err); | |
507 | goto out; | |
508 | } | |
509 | ||
510 | filp->f_pos = *pos; | |
511 | *written = err; | |
512 | err = 0; | |
513 | if (sync) { | |
514 | err = vfs_fsync_range(filp, offset, offset + *written, 0); | |
515 | if (err < 0) | |
516 | ksmbd_err("fsync failed for filename = %s, err = %d\n", | |
517 | FP_FILENAME(fp), err); | |
518 | } | |
519 | ||
520 | out: | |
521 | return err; | |
522 | } | |
523 | ||
524 | /** | |
525 | * ksmbd_vfs_getattr() - vfs helper for smb getattr | |
526 | * @work: work | |
527 | * @fid: file id of open file | |
528 | * @attrs: inode attributes | |
529 | * | |
530 | * Return: 0 on success, otherwise error | |
531 | */ | |
532 | int ksmbd_vfs_getattr(struct path *path, struct kstat *stat) | |
533 | { | |
534 | int err; | |
535 | ||
536 | err = vfs_getattr(path, stat, STATX_BTIME, AT_STATX_SYNC_AS_STAT); | |
537 | if (err) | |
538 | ksmbd_err("getattr failed, err %d\n", err); | |
539 | return err; | |
540 | } | |
541 | ||
542 | /** | |
543 | * ksmbd_vfs_fsync() - vfs helper for smb fsync | |
544 | * @work: work | |
545 | * @fid: file id of open file | |
546 | * | |
547 | * Return: 0 on success, otherwise error | |
548 | */ | |
64b39f4a | 549 | int ksmbd_vfs_fsync(struct ksmbd_work *work, u64 fid, u64 p_id) |
f4415848 NJ |
550 | { |
551 | struct ksmbd_file *fp; | |
552 | int err; | |
553 | ||
554 | fp = ksmbd_lookup_fd_slow(work, fid, p_id); | |
555 | if (!fp) { | |
556 | ksmbd_err("failed to get filp for fid %llu\n", fid); | |
557 | return -ENOENT; | |
558 | } | |
559 | err = vfs_fsync(fp->filp, 0); | |
560 | if (err < 0) | |
561 | ksmbd_err("smb fsync failed, err = %d\n", err); | |
562 | ksmbd_fd_put(work, fp); | |
563 | return err; | |
564 | } | |
565 | ||
566 | /** | |
567 | * ksmbd_vfs_remove_file() - vfs helper for smb rmdir or unlink | |
568 | * @name: absolute directory or file name | |
569 | * | |
570 | * Return: 0 on success, otherwise error | |
571 | */ | |
572 | int ksmbd_vfs_remove_file(struct ksmbd_work *work, char *name) | |
573 | { | |
7c3d3e99 NJ |
574 | struct path path; |
575 | struct dentry *dentry, *parent; | |
3161ad3a | 576 | int err; |
f4415848 | 577 | |
f4415848 NJ |
578 | if (ksmbd_override_fsids(work)) |
579 | return -ENOMEM; | |
580 | ||
7c3d3e99 | 581 | err = kern_path(name, LOOKUP_FOLLOW, &path); |
f4415848 NJ |
582 | if (err) { |
583 | ksmbd_debug(VFS, "can't get %s, err %d\n", name, err); | |
584 | ksmbd_revert_fsids(work); | |
f4415848 NJ |
585 | return err; |
586 | } | |
587 | ||
7c3d3e99 NJ |
588 | parent = dget_parent(path.dentry); |
589 | inode_lock_nested(d_inode(parent), I_MUTEX_PARENT); | |
590 | dentry = lookup_one_len(path.dentry->d_name.name, parent, | |
591 | strlen(path.dentry->d_name.name)); | |
f4415848 NJ |
592 | if (IS_ERR(dentry)) { |
593 | err = PTR_ERR(dentry); | |
7c3d3e99 NJ |
594 | ksmbd_debug(VFS, "%s: lookup failed, err %d\n", |
595 | path.dentry->d_name.name, err); | |
f4415848 NJ |
596 | goto out_err; |
597 | } | |
598 | ||
599 | if (!d_inode(dentry) || !d_inode(dentry)->i_nlink) { | |
600 | dput(dentry); | |
601 | err = -ENOENT; | |
602 | goto out_err; | |
603 | } | |
604 | ||
605 | if (S_ISDIR(d_inode(dentry)->i_mode)) { | |
7c3d3e99 | 606 | err = vfs_rmdir(&init_user_ns, d_inode(parent), dentry); |
f4415848 NJ |
607 | if (err && err != -ENOTEMPTY) |
608 | ksmbd_debug(VFS, "%s: rmdir failed, err %d\n", name, | |
609 | err); | |
610 | } else { | |
7c3d3e99 | 611 | err = vfs_unlink(&init_user_ns, d_inode(parent), dentry, NULL); |
f4415848 NJ |
612 | if (err) |
613 | ksmbd_debug(VFS, "%s: unlink failed, err %d\n", name, | |
614 | err); | |
615 | } | |
616 | ||
617 | dput(dentry); | |
618 | out_err: | |
7c3d3e99 NJ |
619 | inode_unlock(d_inode(parent)); |
620 | dput(parent); | |
621 | path_put(&path); | |
f4415848 NJ |
622 | ksmbd_revert_fsids(work); |
623 | return err; | |
624 | } | |
625 | ||
626 | /** | |
627 | * ksmbd_vfs_link() - vfs helper for creating smb hardlink | |
628 | * @oldname: source file name | |
629 | * @newname: hardlink name | |
630 | * | |
631 | * Return: 0 on success, otherwise error | |
632 | */ | |
64b39f4a NJ |
633 | int ksmbd_vfs_link(struct ksmbd_work *work, const char *oldname, |
634 | const char *newname) | |
f4415848 NJ |
635 | { |
636 | struct path oldpath, newpath; | |
637 | struct dentry *dentry; | |
638 | int err; | |
639 | ||
640 | if (ksmbd_override_fsids(work)) | |
641 | return -ENOMEM; | |
642 | ||
643 | err = kern_path(oldname, LOOKUP_FOLLOW, &oldpath); | |
644 | if (err) { | |
645 | ksmbd_err("cannot get linux path for %s, err = %d\n", | |
646 | oldname, err); | |
647 | goto out1; | |
648 | } | |
649 | ||
650 | dentry = kern_path_create(AT_FDCWD, newname, &newpath, | |
651 | LOOKUP_FOLLOW | LOOKUP_REVAL); | |
652 | if (IS_ERR(dentry)) { | |
653 | err = PTR_ERR(dentry); | |
654 | ksmbd_err("path create err for %s, err %d\n", newname, err); | |
655 | goto out2; | |
656 | } | |
657 | ||
658 | err = -EXDEV; | |
659 | if (oldpath.mnt != newpath.mnt) { | |
660 | ksmbd_err("vfs_link failed err %d\n", err); | |
661 | goto out3; | |
662 | } | |
663 | ||
664 | err = vfs_link(oldpath.dentry, &init_user_ns, d_inode(newpath.dentry), | |
665 | dentry, NULL); | |
666 | if (err) | |
667 | ksmbd_debug(VFS, "vfs_link failed err %d\n", err); | |
668 | ||
669 | out3: | |
670 | done_path_create(&newpath, dentry); | |
671 | out2: | |
672 | path_put(&oldpath); | |
673 | out1: | |
674 | ksmbd_revert_fsids(work); | |
675 | return err; | |
676 | } | |
677 | ||
678 | static int __ksmbd_vfs_rename(struct ksmbd_work *work, | |
64b39f4a NJ |
679 | struct dentry *src_dent_parent, struct dentry *src_dent, |
680 | struct dentry *dst_dent_parent, struct dentry *trap_dent, | |
681 | char *dst_name) | |
f4415848 NJ |
682 | { |
683 | struct dentry *dst_dent; | |
684 | int err; | |
685 | ||
c36fca86 NJ |
686 | if (!work->tcon->posix_extensions) { |
687 | spin_lock(&src_dent->d_lock); | |
688 | list_for_each_entry(dst_dent, &src_dent->d_subdirs, d_child) { | |
689 | struct ksmbd_file *child_fp; | |
f4415848 | 690 | |
c36fca86 NJ |
691 | if (d_really_is_negative(dst_dent)) |
692 | continue; | |
f4415848 | 693 | |
c36fca86 NJ |
694 | child_fp = ksmbd_lookup_fd_inode(d_inode(dst_dent)); |
695 | if (child_fp) { | |
696 | spin_unlock(&src_dent->d_lock); | |
697 | ksmbd_debug(VFS, "Forbid rename, sub file/dir is in use\n"); | |
698 | return -EACCES; | |
699 | } | |
f4415848 | 700 | } |
c36fca86 | 701 | spin_unlock(&src_dent->d_lock); |
f4415848 | 702 | } |
f4415848 NJ |
703 | |
704 | if (d_really_is_negative(src_dent_parent)) | |
705 | return -ENOENT; | |
706 | if (d_really_is_negative(dst_dent_parent)) | |
707 | return -ENOENT; | |
708 | if (d_really_is_negative(src_dent)) | |
709 | return -ENOENT; | |
710 | if (src_dent == trap_dent) | |
711 | return -EINVAL; | |
712 | ||
713 | if (ksmbd_override_fsids(work)) | |
714 | return -ENOMEM; | |
715 | ||
716 | dst_dent = lookup_one_len(dst_name, dst_dent_parent, strlen(dst_name)); | |
717 | err = PTR_ERR(dst_dent); | |
718 | if (IS_ERR(dst_dent)) { | |
719 | ksmbd_err("lookup failed %s [%d]\n", dst_name, err); | |
720 | goto out; | |
721 | } | |
722 | ||
723 | err = -ENOTEMPTY; | |
724 | if (dst_dent != trap_dent && !d_really_is_positive(dst_dent)) { | |
725 | struct renamedata rd = { | |
726 | .old_mnt_userns = &init_user_ns, | |
727 | .old_dir = d_inode(src_dent_parent), | |
728 | .old_dentry = src_dent, | |
729 | .new_mnt_userns = &init_user_ns, | |
730 | .new_dir = d_inode(dst_dent_parent), | |
731 | .new_dentry = dst_dent, | |
732 | }; | |
733 | err = vfs_rename(&rd); | |
734 | } | |
735 | if (err) | |
736 | ksmbd_err("vfs_rename failed err %d\n", err); | |
737 | if (dst_dent) | |
738 | dput(dst_dent); | |
739 | out: | |
740 | ksmbd_revert_fsids(work); | |
741 | return err; | |
742 | } | |
743 | ||
744 | int ksmbd_vfs_fp_rename(struct ksmbd_work *work, struct ksmbd_file *fp, | |
745 | char *newname) | |
746 | { | |
747 | struct path dst_path; | |
748 | struct dentry *src_dent_parent, *dst_dent_parent; | |
ff1d5727 | 749 | struct dentry *src_dent, *trap_dent, *src_child; |
f4415848 NJ |
750 | char *dst_name; |
751 | int err; | |
752 | ||
753 | dst_name = extract_last_component(newname); | |
754 | if (!dst_name) | |
755 | return -EINVAL; | |
756 | ||
757 | src_dent_parent = dget_parent(fp->filp->f_path.dentry); | |
f4415848 | 758 | src_dent = fp->filp->f_path.dentry; |
f4415848 NJ |
759 | |
760 | err = kern_path(newname, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, &dst_path); | |
761 | if (err) { | |
762 | ksmbd_debug(VFS, "Cannot get path for %s [%d]\n", newname, err); | |
763 | goto out; | |
764 | } | |
765 | dst_dent_parent = dst_path.dentry; | |
f4415848 NJ |
766 | |
767 | trap_dent = lock_rename(src_dent_parent, dst_dent_parent); | |
ff1d5727 NJ |
768 | dget(src_dent); |
769 | dget(dst_dent_parent); | |
770 | src_child = lookup_one_len(src_dent->d_name.name, src_dent_parent, | |
771 | src_dent->d_name.len); | |
772 | if (IS_ERR(src_child)) { | |
773 | err = PTR_ERR(src_child); | |
774 | goto out_lock; | |
775 | } | |
776 | ||
777 | if (src_child != src_dent) { | |
778 | err = -ESTALE; | |
779 | dput(src_child); | |
780 | goto out_lock; | |
781 | } | |
782 | dput(src_child); | |
783 | ||
f4415848 NJ |
784 | err = __ksmbd_vfs_rename(work, |
785 | src_dent_parent, | |
786 | src_dent, | |
787 | dst_dent_parent, | |
788 | trap_dent, | |
789 | dst_name); | |
ff1d5727 NJ |
790 | out_lock: |
791 | dput(src_dent); | |
f4415848 | 792 | dput(dst_dent_parent); |
ff1d5727 | 793 | unlock_rename(src_dent_parent, dst_dent_parent); |
f4415848 NJ |
794 | path_put(&dst_path); |
795 | out: | |
f4415848 NJ |
796 | dput(src_dent_parent); |
797 | return err; | |
798 | } | |
799 | ||
800 | /** | |
801 | * ksmbd_vfs_truncate() - vfs helper for smb file truncate | |
802 | * @work: work | |
803 | * @name: old filename | |
804 | * @fid: file id of old file | |
805 | * @size: truncate to given size | |
806 | * | |
807 | * Return: 0 on success, otherwise error | |
808 | */ | |
809 | int ksmbd_vfs_truncate(struct ksmbd_work *work, const char *name, | |
64b39f4a | 810 | struct ksmbd_file *fp, loff_t size) |
f4415848 NJ |
811 | { |
812 | struct path path; | |
813 | int err = 0; | |
f4415848 NJ |
814 | |
815 | if (name) { | |
816 | err = kern_path(name, 0, &path); | |
817 | if (err) { | |
818 | ksmbd_err("cannot get linux path for %s, err %d\n", | |
819 | name, err); | |
820 | return err; | |
821 | } | |
822 | err = vfs_truncate(&path, size); | |
823 | if (err) | |
824 | ksmbd_err("truncate failed for %s err %d\n", | |
825 | name, err); | |
826 | path_put(&path); | |
827 | } else { | |
828 | struct file *filp; | |
829 | ||
830 | filp = fp->filp; | |
831 | ||
832 | /* Do we need to break any of a levelII oplock? */ | |
833 | smb_break_all_levII_oplock(work, fp, 1); | |
834 | ||
c36fca86 NJ |
835 | if (!work->tcon->posix_extensions) { |
836 | struct inode *inode = file_inode(filp); | |
f4415848 | 837 | |
c36fca86 NJ |
838 | if (size < inode->i_size) { |
839 | err = check_lock_range(filp, size, | |
840 | inode->i_size - 1, WRITE); | |
841 | } else { | |
842 | err = check_lock_range(filp, inode->i_size, | |
843 | size - 1, WRITE); | |
844 | } | |
845 | ||
846 | if (err) { | |
847 | ksmbd_err("failed due to lock\n"); | |
848 | return -EAGAIN; | |
849 | } | |
f4415848 NJ |
850 | } |
851 | ||
852 | err = vfs_truncate(&filp->f_path, size); | |
853 | if (err) | |
854 | ksmbd_err("truncate failed for filename : %s err %d\n", | |
855 | fp->filename, err); | |
856 | } | |
857 | ||
858 | return err; | |
859 | } | |
860 | ||
861 | /** | |
862 | * ksmbd_vfs_listxattr() - vfs helper for smb list extended attributes | |
863 | * @dentry: dentry of file for listing xattrs | |
864 | * @list: destination buffer | |
865 | * @size: destination buffer length | |
866 | * | |
867 | * Return: xattr list length on success, otherwise error | |
868 | */ | |
869 | ssize_t ksmbd_vfs_listxattr(struct dentry *dentry, char **list) | |
870 | { | |
871 | ssize_t size; | |
872 | char *vlist = NULL; | |
873 | ||
874 | size = vfs_listxattr(dentry, NULL, 0); | |
875 | if (size <= 0) | |
876 | return size; | |
877 | ||
79f6b11a | 878 | vlist = kvmalloc(size, GFP_KERNEL | __GFP_ZERO); |
f4415848 NJ |
879 | if (!vlist) |
880 | return -ENOMEM; | |
881 | ||
882 | *list = vlist; | |
883 | size = vfs_listxattr(dentry, vlist, size); | |
884 | if (size < 0) { | |
885 | ksmbd_debug(VFS, "listxattr failed\n"); | |
79f6b11a | 886 | kvfree(vlist); |
f4415848 NJ |
887 | *list = NULL; |
888 | } | |
889 | ||
890 | return size; | |
891 | } | |
892 | ||
64b39f4a | 893 | static ssize_t ksmbd_vfs_xattr_len(struct dentry *dentry, char *xattr_name) |
f4415848 NJ |
894 | { |
895 | return vfs_getxattr(&init_user_ns, dentry, xattr_name, NULL, 0); | |
896 | } | |
897 | ||
898 | /** | |
899 | * ksmbd_vfs_getxattr() - vfs helper for smb get extended attributes value | |
900 | * @dentry: dentry of file for getting xattrs | |
901 | * @xattr_name: name of xattr name to query | |
902 | * @xattr_buf: destination buffer xattr value | |
903 | * | |
904 | * Return: read xattr value length on success, otherwise error | |
905 | */ | |
64b39f4a NJ |
906 | ssize_t ksmbd_vfs_getxattr(struct dentry *dentry, char *xattr_name, |
907 | char **xattr_buf) | |
f4415848 NJ |
908 | { |
909 | ssize_t xattr_len; | |
910 | char *buf; | |
911 | ||
912 | *xattr_buf = NULL; | |
913 | xattr_len = ksmbd_vfs_xattr_len(dentry, xattr_name); | |
914 | if (xattr_len < 0) | |
915 | return xattr_len; | |
916 | ||
917 | buf = kmalloc(xattr_len + 1, GFP_KERNEL); | |
918 | if (!buf) | |
919 | return -ENOMEM; | |
920 | ||
921 | xattr_len = vfs_getxattr(&init_user_ns, dentry, xattr_name, (void *)buf, | |
922 | xattr_len); | |
923 | if (xattr_len > 0) | |
924 | *xattr_buf = buf; | |
925 | else | |
926 | kfree(buf); | |
927 | return xattr_len; | |
928 | } | |
929 | ||
930 | /** | |
931 | * ksmbd_vfs_setxattr() - vfs helper for smb set extended attributes value | |
932 | * @dentry: dentry to set XATTR at | |
933 | * @name: xattr name for setxattr | |
934 | * @value: xattr value to set | |
935 | * @size: size of xattr value | |
936 | * @flags: destination buffer length | |
937 | * | |
938 | * Return: 0 on success, otherwise error | |
939 | */ | |
64b39f4a NJ |
940 | int ksmbd_vfs_setxattr(struct dentry *dentry, const char *attr_name, |
941 | const void *attr_value, size_t attr_size, int flags) | |
f4415848 NJ |
942 | { |
943 | int err; | |
944 | ||
945 | err = vfs_setxattr(&init_user_ns, dentry, | |
946 | attr_name, | |
947 | attr_value, | |
948 | attr_size, | |
949 | flags); | |
950 | if (err) | |
951 | ksmbd_debug(VFS, "setxattr failed, err %d\n", err); | |
952 | return err; | |
953 | } | |
954 | ||
955 | /** | |
956 | * ksmbd_vfs_set_fadvise() - convert smb IO caching options to linux options | |
957 | * @filp: file pointer for IO | |
958 | * @options: smb IO options | |
959 | */ | |
960 | void ksmbd_vfs_set_fadvise(struct file *filp, __le32 option) | |
961 | { | |
962 | struct address_space *mapping; | |
963 | ||
964 | mapping = filp->f_mapping; | |
965 | ||
966 | if (!option || !mapping) | |
967 | return; | |
968 | ||
64b39f4a | 969 | if (option & FILE_WRITE_THROUGH_LE) { |
f4415848 | 970 | filp->f_flags |= O_SYNC; |
64b39f4a | 971 | } else if (option & FILE_SEQUENTIAL_ONLY_LE) { |
f4415848 NJ |
972 | filp->f_ra.ra_pages = inode_to_bdi(mapping->host)->ra_pages * 2; |
973 | spin_lock(&filp->f_lock); | |
974 | filp->f_mode &= ~FMODE_RANDOM; | |
975 | spin_unlock(&filp->f_lock); | |
976 | } else if (option & FILE_RANDOM_ACCESS_LE) { | |
977 | spin_lock(&filp->f_lock); | |
978 | filp->f_mode |= FMODE_RANDOM; | |
979 | spin_unlock(&filp->f_lock); | |
980 | } | |
981 | } | |
982 | ||
983 | /** | |
984 | * ksmbd_vfs_lock() - vfs helper for smb file locking | |
985 | * @filp: the file to apply the lock to | |
986 | * @cmd: type of locking operation (F_SETLK, F_GETLK, etc.) | |
987 | * @flock: The lock to be applied | |
988 | * | |
989 | * Return: 0 on success, otherwise error | |
990 | */ | |
991 | int ksmbd_vfs_lock(struct file *filp, int cmd, | |
992 | struct file_lock *flock) | |
993 | { | |
994 | ksmbd_debug(VFS, "calling vfs_lock_file\n"); | |
995 | return vfs_lock_file(filp, cmd, flock, NULL); | |
996 | } | |
997 | ||
998 | int ksmbd_vfs_readdir(struct file *file, struct ksmbd_readdir_data *rdata) | |
999 | { | |
1000 | return iterate_dir(file, &rdata->ctx); | |
1001 | } | |
1002 | ||
64b39f4a NJ |
1003 | int ksmbd_vfs_alloc_size(struct ksmbd_work *work, struct ksmbd_file *fp, |
1004 | loff_t len) | |
f4415848 NJ |
1005 | { |
1006 | smb_break_all_levII_oplock(work, fp, 1); | |
1007 | return vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0, len); | |
1008 | } | |
1009 | ||
64b39f4a NJ |
1010 | int ksmbd_vfs_zero_data(struct ksmbd_work *work, struct ksmbd_file *fp, |
1011 | loff_t off, loff_t len) | |
f4415848 NJ |
1012 | { |
1013 | smb_break_all_levII_oplock(work, fp, 1); | |
1014 | if (fp->f_ci->m_fattr & ATTR_SPARSE_FILE_LE) | |
1015 | return vfs_fallocate(fp->filp, | |
1016 | FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, off, len); | |
1017 | ||
1018 | return vfs_fallocate(fp->filp, FALLOC_FL_ZERO_RANGE, off, len); | |
1019 | } | |
1020 | ||
1021 | int ksmbd_vfs_fqar_lseek(struct ksmbd_file *fp, loff_t start, loff_t length, | |
1022 | struct file_allocated_range_buffer *ranges, | |
1023 | int in_count, int *out_count) | |
1024 | { | |
1025 | struct file *f = fp->filp; | |
1026 | struct inode *inode = FP_INODE(fp); | |
1027 | loff_t maxbytes = (u64)inode->i_sb->s_maxbytes, end; | |
1028 | loff_t extent_start, extent_end; | |
1029 | int ret = 0; | |
1030 | ||
1031 | if (start > maxbytes) | |
1032 | return -EFBIG; | |
1033 | ||
1034 | if (!in_count) | |
1035 | return 0; | |
1036 | ||
1037 | /* | |
1038 | * Shrink request scope to what the fs can actually handle. | |
1039 | */ | |
1040 | if (length > maxbytes || (maxbytes - length) < start) | |
1041 | length = maxbytes - start; | |
1042 | ||
1043 | if (start + length > inode->i_size) | |
1044 | length = inode->i_size - start; | |
1045 | ||
1046 | *out_count = 0; | |
1047 | end = start + length; | |
1048 | while (start < end && *out_count < in_count) { | |
1049 | extent_start = f->f_op->llseek(f, start, SEEK_DATA); | |
1050 | if (extent_start < 0) { | |
1051 | if (extent_start != -ENXIO) | |
1052 | ret = (int)extent_start; | |
1053 | break; | |
1054 | } | |
1055 | ||
1056 | if (extent_start >= end) | |
1057 | break; | |
1058 | ||
1059 | extent_end = f->f_op->llseek(f, extent_start, SEEK_HOLE); | |
1060 | if (extent_end < 0) { | |
1061 | if (extent_end != -ENXIO) | |
1062 | ret = (int)extent_end; | |
1063 | break; | |
64b39f4a | 1064 | } else if (extent_start >= extent_end) { |
f4415848 | 1065 | break; |
64b39f4a | 1066 | } |
f4415848 NJ |
1067 | |
1068 | ranges[*out_count].file_offset = cpu_to_le64(extent_start); | |
1069 | ranges[(*out_count)++].length = | |
1070 | cpu_to_le64(min(extent_end, end) - extent_start); | |
1071 | ||
1072 | start = extent_end; | |
1073 | } | |
1074 | ||
1075 | return ret; | |
1076 | } | |
1077 | ||
1078 | int ksmbd_vfs_remove_xattr(struct dentry *dentry, char *attr_name) | |
1079 | { | |
1080 | return vfs_removexattr(&init_user_ns, dentry, attr_name); | |
1081 | } | |
1082 | ||
f4415848 NJ |
1083 | int ksmbd_vfs_unlink(struct dentry *dir, struct dentry *dentry) |
1084 | { | |
ff1d5727 | 1085 | struct dentry *child; |
f4415848 NJ |
1086 | int err = 0; |
1087 | ||
f4415848 | 1088 | inode_lock_nested(d_inode(dir), I_MUTEX_PARENT); |
ff1d5727 NJ |
1089 | dget(dentry); |
1090 | child = lookup_one_len(dentry->d_name.name, dir, | |
1091 | dentry->d_name.len); | |
1092 | if (IS_ERR(child)) { | |
1093 | err = PTR_ERR(child); | |
1094 | goto out; | |
1095 | } | |
1096 | ||
1097 | if (child != dentry) { | |
1098 | err = -ESTALE; | |
1099 | dput(child); | |
f4415848 NJ |
1100 | goto out; |
1101 | } | |
ff1d5727 | 1102 | dput(child); |
f4415848 NJ |
1103 | |
1104 | if (S_ISDIR(d_inode(dentry)->i_mode)) | |
1105 | err = vfs_rmdir(&init_user_ns, d_inode(dir), dentry); | |
1106 | else | |
1107 | err = vfs_unlink(&init_user_ns, d_inode(dir), dentry, NULL); | |
1108 | ||
1109 | out: | |
f4415848 | 1110 | dput(dentry); |
ff1d5727 | 1111 | inode_unlock(d_inode(dir)); |
f4415848 NJ |
1112 | if (err) |
1113 | ksmbd_debug(VFS, "failed to delete, err %d\n", err); | |
1114 | ||
1115 | return err; | |
1116 | } | |
1117 | ||
1118 | /* | |
1119 | * ksmbd_vfs_get_logical_sector_size() - get logical sector size from inode | |
1120 | * @inode: inode | |
1121 | * | |
1122 | * Return: logical sector size | |
1123 | */ | |
1124 | unsigned short ksmbd_vfs_logical_sector_size(struct inode *inode) | |
1125 | { | |
1126 | struct request_queue *q; | |
1127 | unsigned short ret_val = 512; | |
1128 | ||
1129 | if (!inode->i_sb->s_bdev) | |
1130 | return ret_val; | |
1131 | ||
1132 | q = inode->i_sb->s_bdev->bd_disk->queue; | |
1133 | ||
1134 | if (q && q->limits.logical_block_size) | |
1135 | ret_val = q->limits.logical_block_size; | |
1136 | ||
1137 | return ret_val; | |
1138 | } | |
1139 | ||
1140 | /* | |
1141 | * ksmbd_vfs_get_smb2_sector_size() - get fs sector sizes | |
1142 | * @inode: inode | |
1143 | * @fs_ss: fs sector size struct | |
1144 | */ | |
1145 | void ksmbd_vfs_smb2_sector_size(struct inode *inode, | |
64b39f4a | 1146 | struct ksmbd_fs_sector_size *fs_ss) |
f4415848 NJ |
1147 | { |
1148 | struct request_queue *q; | |
1149 | ||
1150 | fs_ss->logical_sector_size = 512; | |
1151 | fs_ss->physical_sector_size = 512; | |
1152 | fs_ss->optimal_io_size = 512; | |
1153 | ||
1154 | if (!inode->i_sb->s_bdev) | |
1155 | return; | |
1156 | ||
1157 | q = inode->i_sb->s_bdev->bd_disk->queue; | |
1158 | ||
1159 | if (q) { | |
1160 | if (q->limits.logical_block_size) | |
1161 | fs_ss->logical_sector_size = | |
1162 | q->limits.logical_block_size; | |
1163 | if (q->limits.physical_block_size) | |
1164 | fs_ss->physical_sector_size = | |
1165 | q->limits.physical_block_size; | |
1166 | if (q->limits.io_opt) | |
1167 | fs_ss->optimal_io_size = q->limits.io_opt; | |
1168 | } | |
1169 | } | |
1170 | ||
64b39f4a NJ |
1171 | static int __dir_empty(struct dir_context *ctx, const char *name, int namlen, |
1172 | loff_t offset, u64 ino, unsigned int d_type) | |
f4415848 NJ |
1173 | { |
1174 | struct ksmbd_readdir_data *buf; | |
1175 | ||
1176 | buf = container_of(ctx, struct ksmbd_readdir_data, ctx); | |
1177 | buf->dirent_count++; | |
1178 | ||
1179 | if (buf->dirent_count > 2) | |
1180 | return -ENOTEMPTY; | |
1181 | return 0; | |
1182 | } | |
1183 | ||
1184 | /** | |
1185 | * ksmbd_vfs_empty_dir() - check for empty directory | |
1186 | * @fp: ksmbd file pointer | |
1187 | * | |
1188 | * Return: true if directory empty, otherwise false | |
1189 | */ | |
1190 | int ksmbd_vfs_empty_dir(struct ksmbd_file *fp) | |
1191 | { | |
1192 | int err; | |
1193 | struct ksmbd_readdir_data readdir_data; | |
1194 | ||
1195 | memset(&readdir_data, 0, sizeof(struct ksmbd_readdir_data)); | |
1196 | ||
1197 | set_ctx_actor(&readdir_data.ctx, __dir_empty); | |
1198 | readdir_data.dirent_count = 0; | |
1199 | ||
1200 | err = ksmbd_vfs_readdir(fp->filp, &readdir_data); | |
1201 | if (readdir_data.dirent_count > 2) | |
1202 | err = -ENOTEMPTY; | |
1203 | else | |
1204 | err = 0; | |
1205 | return err; | |
1206 | } | |
1207 | ||
64b39f4a NJ |
1208 | static int __caseless_lookup(struct dir_context *ctx, const char *name, |
1209 | int namlen, loff_t offset, u64 ino, unsigned int d_type) | |
f4415848 NJ |
1210 | { |
1211 | struct ksmbd_readdir_data *buf; | |
1212 | ||
1213 | buf = container_of(ctx, struct ksmbd_readdir_data, ctx); | |
1214 | ||
1215 | if (buf->used != namlen) | |
1216 | return 0; | |
1217 | if (!strncasecmp((char *)buf->private, name, namlen)) { | |
1218 | memcpy((char *)buf->private, name, namlen); | |
1219 | buf->dirent_count = 1; | |
1220 | return -EEXIST; | |
1221 | } | |
1222 | return 0; | |
1223 | } | |
1224 | ||
1225 | /** | |
1226 | * ksmbd_vfs_lookup_in_dir() - lookup a file in a directory | |
3c203783 HL |
1227 | * @dir: path info |
1228 | * @name: filename to lookup | |
1229 | * @namelen: filename length | |
f4415848 NJ |
1230 | * |
1231 | * Return: 0 on success, otherwise error | |
1232 | */ | |
3c203783 | 1233 | static int ksmbd_vfs_lookup_in_dir(struct path *dir, char *name, size_t namelen) |
f4415848 | 1234 | { |
f4415848 NJ |
1235 | int ret; |
1236 | struct file *dfilp; | |
64b39f4a | 1237 | int flags = O_RDONLY | O_LARGEFILE; |
f4415848 NJ |
1238 | struct ksmbd_readdir_data readdir_data = { |
1239 | .ctx.actor = __caseless_lookup, | |
3c203783 HL |
1240 | .private = name, |
1241 | .used = namelen, | |
1242 | .dirent_count = 0, | |
f4415848 NJ |
1243 | }; |
1244 | ||
3c203783 HL |
1245 | dfilp = dentry_open(dir, flags, current_cred()); |
1246 | if (IS_ERR(dfilp)) | |
1247 | return PTR_ERR(dfilp); | |
f4415848 NJ |
1248 | |
1249 | ret = ksmbd_vfs_readdir(dfilp, &readdir_data); | |
1250 | if (readdir_data.dirent_count > 0) | |
1251 | ret = 0; | |
f4415848 | 1252 | fput(dfilp); |
f4415848 NJ |
1253 | return ret; |
1254 | } | |
1255 | ||
1256 | /** | |
1257 | * ksmbd_vfs_kern_path() - lookup a file and get path info | |
1258 | * @name: name of file for lookup | |
1259 | * @flags: lookup flags | |
1260 | * @path: if lookup succeed, return path info | |
1261 | * @caseless: caseless filename lookup | |
1262 | * | |
1263 | * Return: 0 on success, otherwise error | |
1264 | */ | |
1265 | int ksmbd_vfs_kern_path(char *name, unsigned int flags, struct path *path, | |
1266 | bool caseless) | |
1267 | { | |
f4415848 NJ |
1268 | int err; |
1269 | ||
3c203783 HL |
1270 | if (name[0] != '/') |
1271 | return -EINVAL; | |
1272 | ||
f4415848 NJ |
1273 | err = kern_path(name, flags, path); |
1274 | if (!err) | |
3c203783 | 1275 | return 0; |
f4415848 NJ |
1276 | |
1277 | if (caseless) { | |
3c203783 HL |
1278 | char *filepath; |
1279 | struct path parent; | |
1280 | size_t path_len, remain_len; | |
f4415848 | 1281 | |
3c203783 HL |
1282 | filepath = kstrdup(name, GFP_KERNEL); |
1283 | if (!filepath) | |
1284 | return -ENOMEM; | |
1285 | ||
1286 | path_len = strlen(filepath); | |
1287 | remain_len = path_len - 1; | |
f4415848 | 1288 | |
3c203783 | 1289 | err = kern_path("/", flags, &parent); |
f4415848 NJ |
1290 | if (err) |
1291 | goto out; | |
f4415848 | 1292 | |
3c203783 HL |
1293 | while (d_can_lookup(parent.dentry)) { |
1294 | char *filename = filepath + path_len - remain_len; | |
1295 | char *next = strchrnul(filename, '/'); | |
1296 | size_t filename_len = next - filename; | |
1297 | bool is_last = !next[0]; | |
1298 | ||
1299 | if (filename_len == 0) | |
1300 | break; | |
1301 | ||
1302 | err = ksmbd_vfs_lookup_in_dir(&parent, filename, | |
1303 | filename_len); | |
1304 | if (err) { | |
1305 | path_put(&parent); | |
1306 | goto out; | |
1307 | } | |
1308 | ||
1309 | path_put(&parent); | |
1310 | next[0] = '\0'; | |
1311 | ||
1312 | err = kern_path(filepath, flags, &parent); | |
1313 | if (err) | |
1314 | goto out; | |
1315 | ||
1316 | if (is_last) { | |
1317 | path->mnt = parent.mnt; | |
1318 | path->dentry = parent.dentry; | |
1319 | goto out; | |
1320 | } | |
1321 | ||
1322 | next[0] = '/'; | |
1323 | remain_len -= filename_len + 1; | |
1324 | } | |
1325 | ||
1326 | path_put(&parent); | |
1327 | err = -EINVAL; | |
f4415848 | 1328 | out: |
3c203783 HL |
1329 | kfree(filepath); |
1330 | } | |
f4415848 NJ |
1331 | return err; |
1332 | } | |
1333 | ||
1334 | int ksmbd_vfs_remove_acl_xattrs(struct dentry *dentry) | |
1335 | { | |
1336 | char *name, *xattr_list = NULL; | |
1337 | ssize_t xattr_list_len; | |
1338 | int err = 0; | |
1339 | ||
1340 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
1341 | if (xattr_list_len < 0) { | |
1342 | goto out; | |
1343 | } else if (!xattr_list_len) { | |
1344 | ksmbd_debug(SMB, "empty xattr in the file\n"); | |
1345 | goto out; | |
1346 | } | |
1347 | ||
1348 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
1349 | name += strlen(name) + 1) { | |
1350 | ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name)); | |
1351 | ||
1352 | if (!strncmp(name, XATTR_NAME_POSIX_ACL_ACCESS, | |
64b39f4a | 1353 | sizeof(XATTR_NAME_POSIX_ACL_ACCESS) - 1) || |
f4415848 | 1354 | !strncmp(name, XATTR_NAME_POSIX_ACL_DEFAULT, |
64b39f4a | 1355 | sizeof(XATTR_NAME_POSIX_ACL_DEFAULT) - 1)) { |
f4415848 NJ |
1356 | err = ksmbd_vfs_remove_xattr(dentry, name); |
1357 | if (err) | |
1358 | ksmbd_debug(SMB, | |
1359 | "remove acl xattr failed : %s\n", name); | |
1360 | } | |
1361 | } | |
1362 | out: | |
79f6b11a | 1363 | kvfree(xattr_list); |
f4415848 NJ |
1364 | return err; |
1365 | } | |
1366 | ||
1367 | int ksmbd_vfs_remove_sd_xattrs(struct dentry *dentry) | |
1368 | { | |
1369 | char *name, *xattr_list = NULL; | |
1370 | ssize_t xattr_list_len; | |
1371 | int err = 0; | |
1372 | ||
1373 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
1374 | if (xattr_list_len < 0) { | |
1375 | goto out; | |
1376 | } else if (!xattr_list_len) { | |
1377 | ksmbd_debug(SMB, "empty xattr in the file\n"); | |
1378 | goto out; | |
1379 | } | |
1380 | ||
1381 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
1382 | name += strlen(name) + 1) { | |
1383 | ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name)); | |
1384 | ||
1385 | if (!strncmp(name, XATTR_NAME_SD, XATTR_NAME_SD_LEN)) { | |
1386 | err = ksmbd_vfs_remove_xattr(dentry, name); | |
1387 | if (err) | |
1388 | ksmbd_debug(SMB, "remove xattr failed : %s\n", name); | |
1389 | } | |
1390 | } | |
1391 | out: | |
79f6b11a | 1392 | kvfree(xattr_list); |
f4415848 NJ |
1393 | return err; |
1394 | } | |
1395 | ||
1396 | static struct xattr_smb_acl *ksmbd_vfs_make_xattr_posix_acl(struct inode *inode, | |
1397 | int acl_type) | |
1398 | { | |
1399 | struct xattr_smb_acl *smb_acl = NULL; | |
1400 | struct posix_acl *posix_acls; | |
1401 | struct posix_acl_entry *pa_entry; | |
1402 | struct xattr_acl_entry *xa_entry; | |
1403 | int i; | |
1404 | ||
1405 | posix_acls = ksmbd_vfs_get_acl(inode, acl_type); | |
1406 | if (!posix_acls) | |
1407 | return NULL; | |
1408 | ||
1409 | smb_acl = kzalloc(sizeof(struct xattr_smb_acl) + | |
1410 | sizeof(struct xattr_acl_entry) * posix_acls->a_count, | |
1411 | GFP_KERNEL); | |
1412 | if (!smb_acl) | |
1413 | goto out; | |
1414 | ||
1415 | smb_acl->count = posix_acls->a_count; | |
1416 | pa_entry = posix_acls->a_entries; | |
1417 | xa_entry = smb_acl->entries; | |
1418 | for (i = 0; i < posix_acls->a_count; i++, pa_entry++, xa_entry++) { | |
1419 | switch (pa_entry->e_tag) { | |
1420 | case ACL_USER: | |
1421 | xa_entry->type = SMB_ACL_USER; | |
1422 | xa_entry->uid = from_kuid(&init_user_ns, pa_entry->e_uid); | |
1423 | break; | |
1424 | case ACL_USER_OBJ: | |
1425 | xa_entry->type = SMB_ACL_USER_OBJ; | |
1426 | break; | |
1427 | case ACL_GROUP: | |
1428 | xa_entry->type = SMB_ACL_GROUP; | |
1429 | xa_entry->gid = from_kgid(&init_user_ns, pa_entry->e_gid); | |
1430 | break; | |
1431 | case ACL_GROUP_OBJ: | |
1432 | xa_entry->type = SMB_ACL_GROUP_OBJ; | |
1433 | break; | |
1434 | case ACL_OTHER: | |
1435 | xa_entry->type = SMB_ACL_OTHER; | |
1436 | break; | |
1437 | case ACL_MASK: | |
1438 | xa_entry->type = SMB_ACL_MASK; | |
1439 | break; | |
1440 | default: | |
1441 | ksmbd_err("unknown type : 0x%x\n", pa_entry->e_tag); | |
1442 | goto out; | |
1443 | } | |
1444 | ||
1445 | if (pa_entry->e_perm & ACL_READ) | |
1446 | xa_entry->perm |= SMB_ACL_READ; | |
1447 | if (pa_entry->e_perm & ACL_WRITE) | |
1448 | xa_entry->perm |= SMB_ACL_WRITE; | |
1449 | if (pa_entry->e_perm & ACL_EXECUTE) | |
1450 | xa_entry->perm |= SMB_ACL_EXECUTE; | |
1451 | } | |
1452 | out: | |
1453 | posix_acl_release(posix_acls); | |
1454 | return smb_acl; | |
1455 | } | |
1456 | ||
1457 | int ksmbd_vfs_set_sd_xattr(struct ksmbd_conn *conn, struct dentry *dentry, | |
1458 | struct smb_ntsd *pntsd, int len) | |
1459 | { | |
1460 | int rc; | |
1461 | struct ndr sd_ndr = {0}, acl_ndr = {0}; | |
1462 | struct xattr_ntacl acl = {0}; | |
1463 | struct xattr_smb_acl *smb_acl, *def_smb_acl = NULL; | |
1464 | struct inode *inode = dentry->d_inode; | |
1465 | ||
1466 | acl.version = 4; | |
1467 | acl.hash_type = XATTR_SD_HASH_TYPE_SHA256; | |
1468 | acl.current_time = ksmbd_UnixTimeToNT(current_time(dentry->d_inode)); | |
1469 | ||
1470 | memcpy(acl.desc, "posix_acl", 9); | |
1471 | acl.desc_len = 10; | |
1472 | ||
1473 | pntsd->osidoffset = | |
1474 | cpu_to_le32(le32_to_cpu(pntsd->osidoffset) + NDR_NTSD_OFFSETOF); | |
1475 | pntsd->gsidoffset = | |
1476 | cpu_to_le32(le32_to_cpu(pntsd->gsidoffset) + NDR_NTSD_OFFSETOF); | |
1477 | pntsd->dacloffset = | |
1478 | cpu_to_le32(le32_to_cpu(pntsd->dacloffset) + NDR_NTSD_OFFSETOF); | |
1479 | ||
1480 | acl.sd_buf = (char *)pntsd; | |
1481 | acl.sd_size = len; | |
1482 | ||
1483 | rc = ksmbd_gen_sd_hash(conn, acl.sd_buf, acl.sd_size, acl.hash); | |
1484 | if (rc) { | |
1485 | ksmbd_err("failed to generate hash for ndr acl\n"); | |
1486 | return rc; | |
1487 | } | |
1488 | ||
1489 | smb_acl = ksmbd_vfs_make_xattr_posix_acl(dentry->d_inode, ACL_TYPE_ACCESS); | |
1490 | if (S_ISDIR(inode->i_mode)) | |
1491 | def_smb_acl = ksmbd_vfs_make_xattr_posix_acl(dentry->d_inode, | |
1492 | ACL_TYPE_DEFAULT); | |
1493 | ||
1494 | rc = ndr_encode_posix_acl(&acl_ndr, inode, smb_acl, def_smb_acl); | |
1495 | if (rc) { | |
1496 | ksmbd_err("failed to encode ndr to posix acl\n"); | |
1497 | goto out; | |
1498 | } | |
1499 | ||
1500 | rc = ksmbd_gen_sd_hash(conn, acl_ndr.data, acl_ndr.offset, | |
1501 | acl.posix_acl_hash); | |
1502 | if (rc) { | |
1503 | ksmbd_err("failed to generate hash for ndr acl\n"); | |
1504 | goto out; | |
1505 | } | |
1506 | ||
1507 | rc = ndr_encode_v4_ntacl(&sd_ndr, &acl); | |
1508 | if (rc) { | |
1509 | ksmbd_err("failed to encode ndr to posix acl\n"); | |
1510 | goto out; | |
1511 | } | |
1512 | ||
1513 | rc = ksmbd_vfs_setxattr(dentry, XATTR_NAME_SD, sd_ndr.data, | |
1514 | sd_ndr.offset, 0); | |
1515 | if (rc < 0) | |
1516 | ksmbd_err("Failed to store XATTR ntacl :%d\n", rc); | |
1517 | ||
1518 | kfree(sd_ndr.data); | |
1519 | out: | |
1520 | kfree(acl_ndr.data); | |
1521 | kfree(smb_acl); | |
1522 | kfree(def_smb_acl); | |
1523 | return rc; | |
1524 | } | |
1525 | ||
1526 | int ksmbd_vfs_get_sd_xattr(struct ksmbd_conn *conn, struct dentry *dentry, | |
1527 | struct smb_ntsd **pntsd) | |
1528 | { | |
1529 | int rc; | |
1530 | struct ndr n; | |
1531 | ||
1532 | rc = ksmbd_vfs_getxattr(dentry, XATTR_NAME_SD, &n.data); | |
1533 | if (rc > 0) { | |
1534 | struct inode *inode = dentry->d_inode; | |
1535 | struct ndr acl_ndr = {0}; | |
1536 | struct xattr_ntacl acl; | |
1537 | struct xattr_smb_acl *smb_acl = NULL, *def_smb_acl = NULL; | |
1538 | __u8 cmp_hash[XATTR_SD_HASH_SIZE] = {0}; | |
1539 | ||
1540 | n.length = rc; | |
1541 | rc = ndr_decode_v4_ntacl(&n, &acl); | |
1542 | if (rc) | |
1543 | return rc; | |
1544 | ||
1545 | smb_acl = ksmbd_vfs_make_xattr_posix_acl(inode, | |
1546 | ACL_TYPE_ACCESS); | |
1547 | if (S_ISDIR(inode->i_mode)) | |
1548 | def_smb_acl = ksmbd_vfs_make_xattr_posix_acl(inode, | |
1549 | ACL_TYPE_DEFAULT); | |
1550 | ||
1551 | rc = ndr_encode_posix_acl(&acl_ndr, inode, smb_acl, def_smb_acl); | |
1552 | if (rc) { | |
1553 | ksmbd_err("failed to encode ndr to posix acl\n"); | |
1554 | goto out; | |
1555 | } | |
1556 | ||
1557 | rc = ksmbd_gen_sd_hash(conn, acl_ndr.data, acl_ndr.offset, | |
1558 | cmp_hash); | |
1559 | if (rc) { | |
1560 | ksmbd_err("failed to generate hash for ndr acl\n"); | |
1561 | goto out; | |
1562 | } | |
1563 | ||
1564 | if (memcmp(cmp_hash, acl.posix_acl_hash, XATTR_SD_HASH_SIZE)) { | |
1565 | ksmbd_err("hash value diff\n"); | |
1566 | rc = -EINVAL; | |
1567 | goto out; | |
1568 | } | |
1569 | ||
1570 | *pntsd = acl.sd_buf; | |
1571 | (*pntsd)->osidoffset = | |
1572 | cpu_to_le32(le32_to_cpu((*pntsd)->osidoffset) - NDR_NTSD_OFFSETOF); | |
1573 | (*pntsd)->gsidoffset = | |
1574 | cpu_to_le32(le32_to_cpu((*pntsd)->gsidoffset) - NDR_NTSD_OFFSETOF); | |
1575 | (*pntsd)->dacloffset = | |
1576 | cpu_to_le32(le32_to_cpu((*pntsd)->dacloffset) - NDR_NTSD_OFFSETOF); | |
1577 | ||
1578 | rc = acl.sd_size; | |
1579 | out: | |
1580 | kfree(n.data); | |
1581 | kfree(acl_ndr.data); | |
1582 | kfree(smb_acl); | |
1583 | kfree(def_smb_acl); | |
1584 | } | |
1585 | ||
1586 | return rc; | |
1587 | } | |
1588 | ||
1589 | int ksmbd_vfs_set_dos_attrib_xattr(struct dentry *dentry, | |
1590 | struct xattr_dos_attrib *da) | |
1591 | { | |
1592 | struct ndr n; | |
1593 | int err; | |
1594 | ||
1595 | err = ndr_encode_dos_attr(&n, da); | |
1596 | if (err) | |
1597 | return err; | |
1598 | ||
1599 | err = ksmbd_vfs_setxattr(dentry, | |
1600 | XATTR_NAME_DOS_ATTRIBUTE, | |
1601 | (void *)n.data, | |
1602 | n.offset, | |
1603 | 0); | |
1604 | if (err) | |
1605 | ksmbd_debug(SMB, "failed to store dos attribute in xattr\n"); | |
1606 | kfree(n.data); | |
1607 | ||
1608 | return err; | |
1609 | } | |
1610 | ||
1611 | int ksmbd_vfs_get_dos_attrib_xattr(struct dentry *dentry, | |
1612 | struct xattr_dos_attrib *da) | |
1613 | { | |
1614 | struct ndr n; | |
1615 | int err; | |
1616 | ||
1617 | err = ksmbd_vfs_getxattr(dentry, | |
1618 | XATTR_NAME_DOS_ATTRIBUTE, | |
1619 | (char **)&n.data); | |
1620 | if (err > 0) { | |
1621 | n.length = err; | |
1622 | if (ndr_decode_dos_attr(&n, da)) | |
1623 | err = -EINVAL; | |
79f6b11a | 1624 | kfree(n.data); |
64b39f4a | 1625 | } else { |
f4415848 | 1626 | ksmbd_debug(SMB, "failed to load dos attribute in xattr\n"); |
64b39f4a | 1627 | } |
f4415848 NJ |
1628 | |
1629 | return err; | |
1630 | } | |
1631 | ||
1632 | struct posix_acl *ksmbd_vfs_posix_acl_alloc(int count, gfp_t flags) | |
1633 | { | |
1634 | #if IS_ENABLED(CONFIG_FS_POSIX_ACL) | |
1635 | return posix_acl_alloc(count, flags); | |
1636 | #else | |
1637 | return NULL; | |
1638 | #endif | |
1639 | } | |
1640 | ||
1641 | struct posix_acl *ksmbd_vfs_get_acl(struct inode *inode, int type) | |
1642 | { | |
1643 | #if IS_ENABLED(CONFIG_FS_POSIX_ACL) | |
1644 | return get_acl(inode, type); | |
1645 | #else | |
1646 | return NULL; | |
1647 | #endif | |
1648 | } | |
1649 | ||
1650 | int ksmbd_vfs_set_posix_acl(struct inode *inode, int type, | |
1651 | struct posix_acl *acl) | |
1652 | { | |
1653 | #if IS_ENABLED(CONFIG_FS_POSIX_ACL) | |
1654 | return set_posix_acl(&init_user_ns, inode, type, acl); | |
1655 | #else | |
1656 | return -EOPNOTSUPP; | |
1657 | #endif | |
1658 | } | |
1659 | ||
1660 | /** | |
1661 | * ksmbd_vfs_init_kstat() - convert unix stat information to smb stat format | |
1662 | * @p: destination buffer | |
1663 | * @ksmbd_kstat: ksmbd kstat wrapper | |
1664 | */ | |
1665 | void *ksmbd_vfs_init_kstat(char **p, struct ksmbd_kstat *ksmbd_kstat) | |
1666 | { | |
1667 | struct file_directory_info *info = (struct file_directory_info *)(*p); | |
1668 | struct kstat *kstat = ksmbd_kstat->kstat; | |
1669 | u64 time; | |
1670 | ||
1671 | info->FileIndex = 0; | |
1672 | info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time); | |
1673 | time = ksmbd_UnixTimeToNT(kstat->atime); | |
1674 | info->LastAccessTime = cpu_to_le64(time); | |
1675 | time = ksmbd_UnixTimeToNT(kstat->mtime); | |
1676 | info->LastWriteTime = cpu_to_le64(time); | |
1677 | time = ksmbd_UnixTimeToNT(kstat->ctime); | |
1678 | info->ChangeTime = cpu_to_le64(time); | |
1679 | ||
1680 | if (ksmbd_kstat->file_attributes & ATTR_DIRECTORY_LE) { | |
1681 | info->EndOfFile = 0; | |
1682 | info->AllocationSize = 0; | |
1683 | } else { | |
1684 | info->EndOfFile = cpu_to_le64(kstat->size); | |
1685 | info->AllocationSize = cpu_to_le64(kstat->blocks << 9); | |
1686 | } | |
1687 | info->ExtFileAttributes = ksmbd_kstat->file_attributes; | |
1688 | ||
1689 | return info; | |
1690 | } | |
1691 | ||
64b39f4a NJ |
1692 | int ksmbd_vfs_fill_dentry_attrs(struct ksmbd_work *work, struct dentry *dentry, |
1693 | struct ksmbd_kstat *ksmbd_kstat) | |
f4415848 NJ |
1694 | { |
1695 | u64 time; | |
1696 | int rc; | |
1697 | ||
1698 | generic_fillattr(&init_user_ns, d_inode(dentry), ksmbd_kstat->kstat); | |
1699 | ||
1700 | time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime); | |
1701 | ksmbd_kstat->create_time = time; | |
1702 | ||
1703 | /* | |
1704 | * set default value for the case that store dos attributes is not yes | |
1705 | * or that acl is disable in server's filesystem and the config is yes. | |
1706 | */ | |
1707 | if (S_ISDIR(ksmbd_kstat->kstat->mode)) | |
1708 | ksmbd_kstat->file_attributes = ATTR_DIRECTORY_LE; | |
1709 | else | |
1710 | ksmbd_kstat->file_attributes = ATTR_ARCHIVE_LE; | |
1711 | ||
1712 | if (test_share_config_flag(work->tcon->share_conf, | |
64b39f4a | 1713 | KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) { |
f4415848 NJ |
1714 | struct xattr_dos_attrib da; |
1715 | ||
1716 | rc = ksmbd_vfs_get_dos_attrib_xattr(dentry, &da); | |
1717 | if (rc > 0) { | |
1718 | ksmbd_kstat->file_attributes = cpu_to_le32(da.attr); | |
1719 | ksmbd_kstat->create_time = da.create_time; | |
64b39f4a | 1720 | } else { |
f4415848 | 1721 | ksmbd_debug(VFS, "fail to load dos attribute.\n"); |
64b39f4a | 1722 | } |
f4415848 NJ |
1723 | } |
1724 | ||
1725 | return 0; | |
1726 | } | |
1727 | ||
64b39f4a NJ |
1728 | ssize_t ksmbd_vfs_casexattr_len(struct dentry *dentry, char *attr_name, |
1729 | int attr_name_len) | |
f4415848 NJ |
1730 | { |
1731 | char *name, *xattr_list = NULL; | |
1732 | ssize_t value_len = -ENOENT, xattr_list_len; | |
1733 | ||
1734 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
1735 | if (xattr_list_len <= 0) | |
1736 | goto out; | |
1737 | ||
1738 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
1739 | name += strlen(name) + 1) { | |
1740 | ksmbd_debug(VFS, "%s, len %zd\n", name, strlen(name)); | |
1741 | if (strncasecmp(attr_name, name, attr_name_len)) | |
1742 | continue; | |
1743 | ||
1744 | value_len = ksmbd_vfs_xattr_len(dentry, name); | |
1745 | break; | |
1746 | } | |
1747 | ||
1748 | out: | |
79f6b11a | 1749 | kvfree(xattr_list); |
f4415848 NJ |
1750 | return value_len; |
1751 | } | |
1752 | ||
64b39f4a NJ |
1753 | int ksmbd_vfs_xattr_stream_name(char *stream_name, char **xattr_stream_name, |
1754 | size_t *xattr_stream_name_size, int s_type) | |
f4415848 NJ |
1755 | { |
1756 | int stream_name_size; | |
1757 | char *xattr_stream_name_buf; | |
1758 | char *type; | |
1759 | int type_len; | |
1760 | ||
1761 | if (s_type == DIR_STREAM) | |
1762 | type = ":$INDEX_ALLOCATION"; | |
1763 | else | |
1764 | type = ":$DATA"; | |
1765 | ||
1766 | type_len = strlen(type); | |
1767 | stream_name_size = strlen(stream_name); | |
1768 | *xattr_stream_name_size = stream_name_size + XATTR_NAME_STREAM_LEN + 1; | |
1769 | xattr_stream_name_buf = kmalloc(*xattr_stream_name_size + type_len, | |
1770 | GFP_KERNEL); | |
1771 | if (!xattr_stream_name_buf) | |
1772 | return -ENOMEM; | |
1773 | ||
1774 | memcpy(xattr_stream_name_buf, | |
1775 | XATTR_NAME_STREAM, | |
1776 | XATTR_NAME_STREAM_LEN); | |
1777 | ||
1778 | if (stream_name_size) { | |
1779 | memcpy(&xattr_stream_name_buf[XATTR_NAME_STREAM_LEN], | |
1780 | stream_name, | |
1781 | stream_name_size); | |
1782 | } | |
1783 | memcpy(&xattr_stream_name_buf[*xattr_stream_name_size - 1], type, type_len); | |
1784 | *xattr_stream_name_size += type_len; | |
1785 | ||
1786 | xattr_stream_name_buf[*xattr_stream_name_size - 1] = '\0'; | |
1787 | *xattr_stream_name = xattr_stream_name_buf; | |
1788 | ||
1789 | return 0; | |
1790 | } | |
1791 | ||
1792 | static int ksmbd_vfs_copy_file_range(struct file *file_in, loff_t pos_in, | |
64b39f4a | 1793 | struct file *file_out, loff_t pos_out, size_t len) |
f4415848 NJ |
1794 | { |
1795 | struct inode *inode_in = file_inode(file_in); | |
1796 | struct inode *inode_out = file_inode(file_out); | |
1797 | int ret; | |
1798 | ||
1799 | ret = vfs_copy_file_range(file_in, pos_in, file_out, pos_out, len, 0); | |
1800 | /* do splice for the copy between different file systems */ | |
1801 | if (ret != -EXDEV) | |
1802 | return ret; | |
1803 | ||
1804 | if (S_ISDIR(inode_in->i_mode) || S_ISDIR(inode_out->i_mode)) | |
1805 | return -EISDIR; | |
1806 | if (!S_ISREG(inode_in->i_mode) || !S_ISREG(inode_out->i_mode)) | |
1807 | return -EINVAL; | |
1808 | ||
1809 | if (!(file_in->f_mode & FMODE_READ) || | |
1810 | !(file_out->f_mode & FMODE_WRITE)) | |
1811 | return -EBADF; | |
1812 | ||
1813 | if (len == 0) | |
1814 | return 0; | |
1815 | ||
1816 | file_start_write(file_out); | |
1817 | ||
1818 | /* | |
1819 | * skip the verification of the range of data. it will be done | |
1820 | * in do_splice_direct | |
1821 | */ | |
1822 | ret = do_splice_direct(file_in, &pos_in, file_out, &pos_out, | |
1823 | len > MAX_RW_COUNT ? MAX_RW_COUNT : len, 0); | |
1824 | if (ret > 0) { | |
1825 | fsnotify_access(file_in); | |
1826 | add_rchar(current, ret); | |
1827 | fsnotify_modify(file_out); | |
1828 | add_wchar(current, ret); | |
1829 | } | |
1830 | ||
1831 | inc_syscr(current); | |
1832 | inc_syscw(current); | |
1833 | ||
1834 | file_end_write(file_out); | |
1835 | return ret; | |
1836 | } | |
1837 | ||
1838 | int ksmbd_vfs_copy_file_ranges(struct ksmbd_work *work, | |
64b39f4a NJ |
1839 | struct ksmbd_file *src_fp, struct ksmbd_file *dst_fp, |
1840 | struct srv_copychunk *chunks, unsigned int chunk_count, | |
1841 | unsigned int *chunk_count_written, | |
1842 | unsigned int *chunk_size_written, loff_t *total_size_written) | |
f4415848 NJ |
1843 | { |
1844 | unsigned int i; | |
1845 | loff_t src_off, dst_off, src_file_size; | |
1846 | size_t len; | |
1847 | int ret; | |
1848 | ||
1849 | *chunk_count_written = 0; | |
1850 | *chunk_size_written = 0; | |
1851 | *total_size_written = 0; | |
1852 | ||
1853 | if (!(src_fp->daccess & (FILE_READ_DATA_LE | FILE_EXECUTE_LE))) { | |
1854 | ksmbd_err("no right to read(%s)\n", FP_FILENAME(src_fp)); | |
1855 | return -EACCES; | |
1856 | } | |
1857 | if (!(dst_fp->daccess & (FILE_WRITE_DATA_LE | FILE_APPEND_DATA_LE))) { | |
1858 | ksmbd_err("no right to write(%s)\n", FP_FILENAME(dst_fp)); | |
1859 | return -EACCES; | |
1860 | } | |
1861 | ||
1862 | if (ksmbd_stream_fd(src_fp) || ksmbd_stream_fd(dst_fp)) | |
1863 | return -EBADF; | |
1864 | ||
1865 | smb_break_all_levII_oplock(work, dst_fp, 1); | |
1866 | ||
c36fca86 NJ |
1867 | if (!work->tcon->posix_extensions) { |
1868 | for (i = 0; i < chunk_count; i++) { | |
1869 | src_off = le64_to_cpu(chunks[i].SourceOffset); | |
1870 | dst_off = le64_to_cpu(chunks[i].TargetOffset); | |
1871 | len = le32_to_cpu(chunks[i].Length); | |
1872 | ||
1873 | if (check_lock_range(src_fp->filp, src_off, | |
64b39f4a | 1874 | src_off + len - 1, READ)) |
c36fca86 NJ |
1875 | return -EAGAIN; |
1876 | if (check_lock_range(dst_fp->filp, dst_off, | |
64b39f4a | 1877 | dst_off + len - 1, WRITE)) |
c36fca86 NJ |
1878 | return -EAGAIN; |
1879 | } | |
f4415848 NJ |
1880 | } |
1881 | ||
1882 | src_file_size = i_size_read(file_inode(src_fp->filp)); | |
1883 | ||
1884 | for (i = 0; i < chunk_count; i++) { | |
1885 | src_off = le64_to_cpu(chunks[i].SourceOffset); | |
1886 | dst_off = le64_to_cpu(chunks[i].TargetOffset); | |
1887 | len = le32_to_cpu(chunks[i].Length); | |
1888 | ||
1889 | if (src_off + len > src_file_size) | |
1890 | return -E2BIG; | |
1891 | ||
1892 | ret = ksmbd_vfs_copy_file_range(src_fp->filp, src_off, | |
1893 | dst_fp->filp, dst_off, len); | |
1894 | if (ret < 0) | |
1895 | return ret; | |
1896 | ||
1897 | *chunk_count_written += 1; | |
1898 | *total_size_written += ret; | |
1899 | } | |
1900 | return 0; | |
1901 | } | |
1902 | ||
1903 | int ksmbd_vfs_posix_lock_wait(struct file_lock *flock) | |
1904 | { | |
1905 | return wait_event_interruptible(flock->fl_wait, !flock->fl_blocker); | |
1906 | } | |
1907 | ||
1908 | int ksmbd_vfs_posix_lock_wait_timeout(struct file_lock *flock, long timeout) | |
1909 | { | |
1910 | return wait_event_interruptible_timeout(flock->fl_wait, | |
1911 | !flock->fl_blocker, | |
1912 | timeout); | |
1913 | } | |
1914 | ||
1915 | void ksmbd_vfs_posix_lock_unblock(struct file_lock *flock) | |
1916 | { | |
1917 | locks_delete_block(flock); | |
1918 | } | |
1919 | ||
1920 | int ksmbd_vfs_set_init_posix_acl(struct inode *inode) | |
1921 | { | |
1922 | struct posix_acl_state acl_state; | |
1923 | struct posix_acl *acls; | |
1924 | int rc; | |
1925 | ||
1926 | ksmbd_debug(SMB, "Set posix acls\n"); | |
1927 | rc = init_acl_state(&acl_state, 1); | |
1928 | if (rc) | |
1929 | return rc; | |
1930 | ||
1931 | /* Set default owner group */ | |
1932 | acl_state.owner.allow = (inode->i_mode & 0700) >> 6; | |
1933 | acl_state.group.allow = (inode->i_mode & 0070) >> 3; | |
1934 | acl_state.other.allow = inode->i_mode & 0007; | |
1935 | acl_state.users->aces[acl_state.users->n].uid = inode->i_uid; | |
1936 | acl_state.users->aces[acl_state.users->n++].perms.allow = | |
1937 | acl_state.owner.allow; | |
1938 | acl_state.groups->aces[acl_state.groups->n].gid = inode->i_gid; | |
1939 | acl_state.groups->aces[acl_state.groups->n++].perms.allow = | |
1940 | acl_state.group.allow; | |
1941 | acl_state.mask.allow = 0x07; | |
1942 | ||
1943 | acls = ksmbd_vfs_posix_acl_alloc(6, GFP_KERNEL); | |
1944 | if (!acls) { | |
1945 | free_acl_state(&acl_state); | |
1946 | return -ENOMEM; | |
1947 | } | |
1948 | posix_state_to_acl(&acl_state, acls->a_entries); | |
1949 | rc = ksmbd_vfs_set_posix_acl(inode, ACL_TYPE_ACCESS, acls); | |
1950 | if (rc < 0) | |
1951 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_ACCESS) failed, rc : %d\n", | |
1952 | rc); | |
1953 | else if (S_ISDIR(inode->i_mode)) { | |
1954 | posix_state_to_acl(&acl_state, acls->a_entries); | |
1955 | rc = ksmbd_vfs_set_posix_acl(inode, ACL_TYPE_DEFAULT, acls); | |
1956 | if (rc < 0) | |
1957 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_DEFAULT) failed, rc : %d\n", | |
1958 | rc); | |
1959 | } | |
1960 | free_acl_state(&acl_state); | |
1961 | posix_acl_release(acls); | |
1962 | return rc; | |
1963 | } | |
1964 | ||
1965 | int ksmbd_vfs_inherit_posix_acl(struct inode *inode, struct inode *parent_inode) | |
1966 | { | |
1967 | struct posix_acl *acls; | |
1968 | struct posix_acl_entry *pace; | |
1969 | int rc, i; | |
1970 | ||
1971 | acls = ksmbd_vfs_get_acl(parent_inode, ACL_TYPE_DEFAULT); | |
1972 | if (!acls) | |
1973 | return -ENOENT; | |
1974 | pace = acls->a_entries; | |
1975 | ||
1976 | for (i = 0; i < acls->a_count; i++, pace++) { | |
1977 | if (pace->e_tag == ACL_MASK) { | |
1978 | pace->e_perm = 0x07; | |
1979 | break; | |
1980 | } | |
1981 | } | |
1982 | ||
1983 | rc = ksmbd_vfs_set_posix_acl(inode, ACL_TYPE_ACCESS, acls); | |
1984 | if (rc < 0) | |
1985 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_ACCESS) failed, rc : %d\n", | |
1986 | rc); | |
1987 | if (S_ISDIR(inode->i_mode)) { | |
1988 | rc = ksmbd_vfs_set_posix_acl(inode, ACL_TYPE_DEFAULT, acls); | |
1989 | if (rc < 0) | |
1990 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_DEFAULT) failed, rc : %d\n", | |
1991 | rc); | |
1992 | } | |
1993 | posix_acl_release(acls); | |
1994 | return rc; | |
1995 | } |