]>
Commit | Line | Data |
---|---|---|
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> | |
12 | #include <linux/version.h> | |
13 | #include <linux/xattr.h> | |
14 | #include <linux/falloc.h> | |
15 | #include <linux/genhd.h> | |
16 | #include <linux/blkdev.h> | |
17 | #include <linux/fsnotify.h> | |
18 | #include <linux/dcache.h> | |
19 | #include <linux/slab.h> | |
20 | #include <linux/vmalloc.h> | |
21 | #include <linux/sched/xacct.h> | |
22 | #include <linux/crc32c.h> | |
23 | ||
24 | #include "glob.h" | |
25 | #include "oplock.h" | |
26 | #include "connection.h" | |
27 | #include "buffer_pool.h" | |
28 | #include "vfs.h" | |
29 | #include "vfs_cache.h" | |
30 | #include "smbacl.h" | |
31 | #include "ndr.h" | |
32 | #include "auth.h" | |
33 | ||
34 | #include "time_wrappers.h" | |
35 | #include "smb_common.h" | |
36 | #include "mgmt/share_config.h" | |
37 | #include "mgmt/tree_connect.h" | |
38 | #include "mgmt/user_session.h" | |
39 | #include "mgmt/user_config.h" | |
40 | ||
41 | static char *extract_last_component(char *path) | |
42 | { | |
43 | char *p = strrchr(path, '/'); | |
44 | ||
45 | if (p && p[1] != '\0') { | |
46 | *p = '\0'; | |
47 | p++; | |
48 | } else { | |
49 | p = NULL; | |
50 | ksmbd_err("Invalid path %s\n", path); | |
51 | } | |
52 | return p; | |
53 | } | |
54 | ||
55 | static void rollback_path_modification(char *filename) | |
56 | { | |
57 | if (filename) { | |
58 | filename--; | |
59 | *filename = '/'; | |
60 | } | |
61 | } | |
62 | ||
63 | static void ksmbd_vfs_inherit_owner(struct ksmbd_work *work, | |
64 | struct inode *parent_inode, | |
65 | struct inode *inode) | |
66 | { | |
67 | if (!test_share_config_flag(work->tcon->share_conf, | |
68 | KSMBD_SHARE_FLAG_INHERIT_OWNER)) | |
69 | return; | |
70 | ||
71 | i_uid_write(inode, i_uid_read(parent_inode)); | |
72 | } | |
73 | ||
74 | static void ksmbd_vfs_inherit_smack(struct ksmbd_work *work, | |
75 | struct dentry *dir_dentry, | |
76 | struct dentry *dentry) | |
77 | { | |
78 | char *name, *xattr_list = NULL, *smack_buf; | |
79 | int value_len, xattr_list_len; | |
80 | ||
81 | if (!test_share_config_flag(work->tcon->share_conf, | |
82 | KSMBD_SHARE_FLAG_INHERIT_SMACK)) | |
83 | return; | |
84 | ||
85 | xattr_list_len = ksmbd_vfs_listxattr(dir_dentry, &xattr_list); | |
86 | if (xattr_list_len < 0) { | |
87 | goto out; | |
88 | } else if (!xattr_list_len) { | |
89 | ksmbd_err("no ea data in the file\n"); | |
90 | return; | |
91 | } | |
92 | ||
93 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
94 | name += strlen(name) + 1) { | |
95 | int rc; | |
96 | ||
97 | ksmbd_debug(VFS, "%s, len %zd\n", name, strlen(name)); | |
98 | if (strcmp(name, XATTR_NAME_SMACK)) | |
99 | continue; | |
100 | ||
101 | value_len = ksmbd_vfs_getxattr(dir_dentry, name, &smack_buf); | |
102 | if (value_len <= 0) | |
103 | continue; | |
104 | ||
105 | rc = ksmbd_vfs_setxattr(dentry, XATTR_NAME_SMACK, smack_buf, | |
106 | value_len, 0); | |
107 | ksmbd_free(smack_buf); | |
108 | if (rc < 0) | |
109 | ksmbd_err("ksmbd_vfs_setxattr() failed: %d\n", rc); | |
110 | } | |
111 | out: | |
112 | ksmbd_vfs_xattr_free(xattr_list); | |
113 | } | |
114 | ||
115 | int ksmbd_vfs_inode_permission(struct dentry *dentry, int acc_mode, bool delete) | |
116 | { | |
117 | int mask; | |
118 | ||
119 | mask = 0; | |
120 | acc_mode &= O_ACCMODE; | |
121 | ||
122 | if (acc_mode == O_RDONLY) | |
123 | mask = MAY_READ; | |
124 | else if (acc_mode == O_WRONLY) | |
125 | mask = MAY_WRITE; | |
126 | else if (acc_mode == O_RDWR) | |
127 | mask = MAY_READ | MAY_WRITE; | |
128 | ||
129 | if (inode_permission(&init_user_ns, d_inode(dentry), mask | MAY_OPEN)) | |
130 | return -EACCES; | |
131 | ||
132 | if (delete) { | |
133 | struct dentry *parent; | |
134 | ||
135 | parent = dget_parent(dentry); | |
136 | if (!parent) | |
137 | return -EINVAL; | |
138 | ||
139 | if (inode_permission(&init_user_ns, d_inode(parent), MAY_EXEC | MAY_WRITE)) { | |
140 | dput(parent); | |
141 | return -EACCES; | |
142 | } | |
143 | dput(parent); | |
144 | } | |
145 | return 0; | |
146 | } | |
147 | ||
148 | int ksmbd_vfs_query_maximal_access(struct dentry *dentry, __le32 *daccess) | |
149 | { | |
150 | struct dentry *parent; | |
151 | ||
152 | *daccess = cpu_to_le32(FILE_READ_ATTRIBUTES | READ_CONTROL); | |
153 | ||
154 | if (!inode_permission(&init_user_ns, d_inode(dentry), MAY_OPEN | MAY_WRITE)) | |
155 | *daccess |= cpu_to_le32(WRITE_DAC | WRITE_OWNER | SYNCHRONIZE | | |
156 | FILE_WRITE_DATA | FILE_APPEND_DATA | | |
157 | FILE_WRITE_EA | FILE_WRITE_ATTRIBUTES | | |
158 | FILE_DELETE_CHILD); | |
159 | ||
160 | if (!inode_permission(&init_user_ns, d_inode(dentry), MAY_OPEN | MAY_READ)) | |
161 | *daccess |= FILE_READ_DATA_LE | FILE_READ_EA_LE; | |
162 | ||
163 | if (!inode_permission(&init_user_ns, d_inode(dentry), MAY_OPEN | MAY_EXEC)) | |
164 | *daccess |= FILE_EXECUTE_LE; | |
165 | ||
166 | parent = dget_parent(dentry); | |
167 | if (!parent) | |
168 | return 0; | |
169 | ||
170 | if (!inode_permission(&init_user_ns, d_inode(parent), MAY_EXEC | MAY_WRITE)) | |
171 | *daccess |= FILE_DELETE_LE; | |
172 | dput(parent); | |
173 | return 0; | |
174 | } | |
175 | ||
176 | ||
177 | /** | |
178 | * ksmbd_vfs_create() - vfs helper for smb create file | |
179 | * @work: work | |
180 | * @name: file name | |
181 | * @mode: file create mode | |
182 | * | |
183 | * Return: 0 on success, otherwise error | |
184 | */ | |
185 | int ksmbd_vfs_create(struct ksmbd_work *work, | |
186 | const char *name, | |
187 | umode_t mode) | |
188 | { | |
189 | struct path path; | |
190 | struct dentry *dentry; | |
191 | int err; | |
192 | ||
193 | dentry = kern_path_create(AT_FDCWD, name, &path, 0); | |
194 | if (IS_ERR(dentry)) { | |
195 | err = PTR_ERR(dentry); | |
196 | if (err != -ENOENT) | |
197 | ksmbd_err("path create failed for %s, err %d\n", | |
198 | name, err); | |
199 | return err; | |
200 | } | |
201 | ||
202 | mode |= S_IFREG; | |
203 | err = vfs_create(&init_user_ns, d_inode(path.dentry), dentry, mode, true); | |
204 | if (!err) { | |
205 | ksmbd_vfs_inherit_owner(work, d_inode(path.dentry), | |
206 | d_inode(dentry)); | |
207 | ksmbd_vfs_inherit_smack(work, path.dentry, dentry); | |
208 | } else { | |
209 | ksmbd_err("File(%s): creation failed (err:%d)\n", name, err); | |
210 | } | |
211 | done_path_create(&path, dentry); | |
212 | return err; | |
213 | } | |
214 | ||
215 | /** | |
216 | * ksmbd_vfs_mkdir() - vfs helper for smb create directory | |
217 | * @work: work | |
218 | * @name: directory name | |
219 | * @mode: directory create mode | |
220 | * | |
221 | * Return: 0 on success, otherwise error | |
222 | */ | |
223 | int ksmbd_vfs_mkdir(struct ksmbd_work *work, | |
224 | const char *name, | |
225 | umode_t mode) | |
226 | { | |
227 | struct path path; | |
228 | struct dentry *dentry; | |
229 | int err; | |
230 | ||
231 | dentry = kern_path_create(AT_FDCWD, name, &path, LOOKUP_DIRECTORY); | |
232 | if (IS_ERR(dentry)) { | |
233 | err = PTR_ERR(dentry); | |
234 | if (err != -EEXIST) | |
235 | ksmbd_debug(VFS, "path create failed for %s, err %d\n", | |
236 | name, err); | |
237 | return err; | |
238 | } | |
239 | ||
240 | mode |= S_IFDIR; | |
241 | err = vfs_mkdir(&init_user_ns, d_inode(path.dentry), dentry, mode); | |
242 | if (!err) { | |
243 | ksmbd_vfs_inherit_owner(work, d_inode(path.dentry), | |
244 | d_inode(dentry)); | |
245 | ksmbd_vfs_inherit_smack(work, path.dentry, dentry); | |
246 | } else | |
247 | ksmbd_err("mkdir(%s): creation failed (err:%d)\n", name, err); | |
248 | ||
249 | done_path_create(&path, dentry); | |
250 | return err; | |
251 | } | |
252 | ||
253 | static ssize_t ksmbd_vfs_getcasexattr(struct dentry *dentry, | |
254 | char *attr_name, | |
255 | int attr_name_len, | |
256 | char **attr_value) | |
257 | { | |
258 | char *name, *xattr_list = NULL; | |
259 | ssize_t value_len = -ENOENT, xattr_list_len; | |
260 | ||
261 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
262 | if (xattr_list_len <= 0) | |
263 | goto out; | |
264 | ||
265 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
266 | name += strlen(name) + 1) { | |
267 | ksmbd_debug(VFS, "%s, len %zd\n", name, strlen(name)); | |
268 | if (strncasecmp(attr_name, name, attr_name_len)) | |
269 | continue; | |
270 | ||
271 | value_len = ksmbd_vfs_getxattr(dentry, | |
272 | name, | |
273 | attr_value); | |
274 | if (value_len < 0) | |
275 | ksmbd_err("failed to get xattr in file\n"); | |
276 | break; | |
277 | } | |
278 | ||
279 | out: | |
280 | ksmbd_vfs_xattr_free(xattr_list); | |
281 | return value_len; | |
282 | } | |
283 | ||
284 | static int ksmbd_vfs_stream_read(struct ksmbd_file *fp, char *buf, loff_t *pos, | |
285 | size_t count) | |
286 | { | |
287 | ssize_t v_len; | |
288 | char *stream_buf = NULL; | |
289 | int err; | |
290 | ||
291 | ksmbd_debug(VFS, "read stream data pos : %llu, count : %zd\n", | |
292 | *pos, count); | |
293 | ||
294 | v_len = ksmbd_vfs_getcasexattr(fp->filp->f_path.dentry, | |
295 | fp->stream.name, | |
296 | fp->stream.size, | |
297 | &stream_buf); | |
298 | if (v_len == -ENOENT) { | |
299 | ksmbd_err("not found stream in xattr : %zd\n", v_len); | |
300 | err = -ENOENT; | |
301 | return err; | |
302 | } | |
303 | ||
304 | memcpy(buf, &stream_buf[*pos], count); | |
305 | return v_len > count ? count : v_len; | |
306 | } | |
307 | ||
308 | /** | |
309 | * check_lock_range() - vfs helper for smb byte range file locking | |
310 | * @filp: the file to apply the lock to | |
311 | * @start: lock start byte offset | |
312 | * @end: lock end byte offset | |
313 | * @type: byte range type read/write | |
314 | * | |
315 | * Return: 0 on success, otherwise error | |
316 | */ | |
317 | static int check_lock_range(struct file *filp, | |
318 | loff_t start, | |
319 | loff_t end, | |
320 | unsigned char type) | |
321 | { | |
322 | struct file_lock *flock; | |
323 | struct file_lock_context *ctx = file_inode(filp)->i_flctx; | |
324 | int error = 0; | |
325 | ||
326 | if (!ctx || list_empty_careful(&ctx->flc_posix)) | |
327 | return 0; | |
328 | ||
329 | spin_lock(&ctx->flc_lock); | |
330 | list_for_each_entry(flock, &ctx->flc_posix, fl_list) { | |
331 | /* check conflict locks */ | |
332 | if (flock->fl_end >= start && end >= flock->fl_start) { | |
333 | if (flock->fl_type == F_RDLCK) { | |
334 | if (type == WRITE) { | |
335 | ksmbd_err("not allow write by shared lock\n"); | |
336 | error = 1; | |
337 | goto out; | |
338 | } | |
339 | } else if (flock->fl_type == F_WRLCK) { | |
340 | /* check owner in lock */ | |
341 | if (flock->fl_file != filp) { | |
342 | error = 1; | |
343 | ksmbd_err("not allow rw access by exclusive lock from other opens\n"); | |
344 | goto out; | |
345 | } | |
346 | } | |
347 | } | |
348 | } | |
349 | out: | |
350 | spin_unlock(&ctx->flc_lock); | |
351 | return error; | |
352 | } | |
353 | ||
354 | /** | |
355 | * ksmbd_vfs_read() - vfs helper for smb file read | |
356 | * @work: smb work | |
357 | * @fid: file id of open file | |
358 | * @count: read byte count | |
359 | * @pos: file pos | |
360 | * | |
361 | * Return: number of read bytes on success, otherwise error | |
362 | */ | |
363 | int ksmbd_vfs_read(struct ksmbd_work *work, | |
364 | struct ksmbd_file *fp, | |
365 | size_t count, | |
366 | loff_t *pos) | |
367 | { | |
368 | struct file *filp; | |
369 | ssize_t nbytes = 0; | |
370 | char *rbuf, *name; | |
371 | struct inode *inode; | |
372 | char namebuf[NAME_MAX]; | |
373 | int ret; | |
374 | ||
375 | rbuf = AUX_PAYLOAD(work); | |
376 | filp = fp->filp; | |
377 | inode = d_inode(filp->f_path.dentry); | |
378 | if (S_ISDIR(inode->i_mode)) | |
379 | return -EISDIR; | |
380 | ||
381 | if (unlikely(count == 0)) | |
382 | return 0; | |
383 | ||
384 | if (work->conn->connection_type) { | |
385 | if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_EXECUTE_LE))) { | |
386 | ksmbd_err("no right to read(%s)\n", FP_FILENAME(fp)); | |
387 | return -EACCES; | |
388 | } | |
389 | } | |
390 | ||
391 | if (ksmbd_stream_fd(fp)) | |
392 | return ksmbd_vfs_stream_read(fp, rbuf, pos, count); | |
393 | ||
394 | ret = check_lock_range(filp, *pos, *pos + count - 1, | |
395 | READ); | |
396 | if (ret) { | |
397 | ksmbd_err("unable to read due to lock\n"); | |
398 | return -EAGAIN; | |
399 | } | |
400 | ||
401 | nbytes = kernel_read(filp, rbuf, count, pos); | |
402 | if (nbytes < 0) { | |
403 | name = d_path(&filp->f_path, namebuf, sizeof(namebuf)); | |
404 | if (IS_ERR(name)) | |
405 | name = "(error)"; | |
406 | ksmbd_err("smb read failed for (%s), err = %zd\n", | |
407 | name, nbytes); | |
408 | return nbytes; | |
409 | } | |
410 | ||
411 | filp->f_pos = *pos; | |
412 | return nbytes; | |
413 | } | |
414 | ||
415 | static int ksmbd_vfs_stream_write(struct ksmbd_file *fp, char *buf, loff_t *pos, | |
416 | size_t count) | |
417 | { | |
418 | char *stream_buf = NULL, *wbuf; | |
419 | size_t size, v_len; | |
420 | int err = 0; | |
421 | ||
422 | ksmbd_debug(VFS, "write stream data pos : %llu, count : %zd\n", | |
423 | *pos, count); | |
424 | ||
425 | size = *pos + count; | |
426 | if (size > XATTR_SIZE_MAX) { | |
427 | size = XATTR_SIZE_MAX; | |
428 | count = (*pos + count) - XATTR_SIZE_MAX; | |
429 | } | |
430 | ||
431 | v_len = ksmbd_vfs_getcasexattr(fp->filp->f_path.dentry, | |
432 | fp->stream.name, | |
433 | fp->stream.size, | |
434 | &stream_buf); | |
435 | if (v_len == -ENOENT) { | |
436 | ksmbd_err("not found stream in xattr : %zd\n", v_len); | |
437 | err = -ENOENT; | |
438 | goto out; | |
439 | } | |
440 | ||
441 | if (v_len < size) { | |
442 | wbuf = ksmbd_alloc(size); | |
443 | if (!wbuf) { | |
444 | err = -ENOMEM; | |
445 | goto out; | |
446 | } | |
447 | ||
448 | if (v_len > 0) | |
449 | memcpy(wbuf, stream_buf, v_len); | |
450 | stream_buf = wbuf; | |
451 | } | |
452 | ||
453 | memcpy(&stream_buf[*pos], buf, count); | |
454 | ||
455 | err = ksmbd_vfs_setxattr(fp->filp->f_path.dentry, | |
456 | fp->stream.name, | |
457 | (void *)stream_buf, | |
458 | size, | |
459 | 0); | |
460 | if (err < 0) | |
461 | goto out; | |
462 | ||
463 | fp->filp->f_pos = *pos; | |
464 | err = 0; | |
465 | out: | |
466 | ksmbd_free(stream_buf); | |
467 | return err; | |
468 | } | |
469 | ||
470 | /** | |
471 | * ksmbd_vfs_write() - vfs helper for smb file write | |
472 | * @work: work | |
473 | * @fid: file id of open file | |
474 | * @buf: buf containing data for writing | |
475 | * @count: read byte count | |
476 | * @pos: file pos | |
477 | * @sync: fsync after write | |
478 | * @written: number of bytes written | |
479 | * | |
480 | * Return: 0 on success, otherwise error | |
481 | */ | |
482 | int ksmbd_vfs_write(struct ksmbd_work *work, struct ksmbd_file *fp, | |
483 | char *buf, size_t count, loff_t *pos, bool sync, ssize_t *written) | |
484 | { | |
485 | struct ksmbd_session *sess = work->sess; | |
486 | struct file *filp; | |
487 | loff_t offset = *pos; | |
488 | int err = 0; | |
489 | ||
490 | if (sess->conn->connection_type) { | |
491 | if (!(fp->daccess & FILE_WRITE_DATA_LE)) { | |
492 | ksmbd_err("no right to write(%s)\n", FP_FILENAME(fp)); | |
493 | err = -EACCES; | |
494 | goto out; | |
495 | } | |
496 | } | |
497 | ||
498 | filp = fp->filp; | |
499 | ||
500 | if (ksmbd_stream_fd(fp)) { | |
501 | err = ksmbd_vfs_stream_write(fp, buf, pos, count); | |
502 | if (!err) | |
503 | *written = count; | |
504 | goto out; | |
505 | } | |
506 | ||
507 | err = check_lock_range(filp, *pos, *pos + count - 1, WRITE); | |
508 | if (err) { | |
509 | ksmbd_err("unable to write due to lock\n"); | |
510 | err = -EAGAIN; | |
511 | goto out; | |
512 | } | |
513 | ||
514 | /* Do we need to break any of a levelII oplock? */ | |
515 | smb_break_all_levII_oplock(work, fp, 1); | |
516 | ||
517 | err = kernel_write(filp, buf, count, pos); | |
518 | if (err < 0) { | |
519 | ksmbd_debug(VFS, "smb write failed, err = %d\n", err); | |
520 | goto out; | |
521 | } | |
522 | ||
523 | filp->f_pos = *pos; | |
524 | *written = err; | |
525 | err = 0; | |
526 | if (sync) { | |
527 | err = vfs_fsync_range(filp, offset, offset + *written, 0); | |
528 | if (err < 0) | |
529 | ksmbd_err("fsync failed for filename = %s, err = %d\n", | |
530 | FP_FILENAME(fp), err); | |
531 | } | |
532 | ||
533 | out: | |
534 | return err; | |
535 | } | |
536 | ||
537 | /** | |
538 | * ksmbd_vfs_getattr() - vfs helper for smb getattr | |
539 | * @work: work | |
540 | * @fid: file id of open file | |
541 | * @attrs: inode attributes | |
542 | * | |
543 | * Return: 0 on success, otherwise error | |
544 | */ | |
545 | int ksmbd_vfs_getattr(struct path *path, struct kstat *stat) | |
546 | { | |
547 | int err; | |
548 | ||
549 | err = vfs_getattr(path, stat, STATX_BTIME, AT_STATX_SYNC_AS_STAT); | |
550 | if (err) | |
551 | ksmbd_err("getattr failed, err %d\n", err); | |
552 | return err; | |
553 | } | |
554 | ||
555 | /** | |
556 | * ksmbd_vfs_fsync() - vfs helper for smb fsync | |
557 | * @work: work | |
558 | * @fid: file id of open file | |
559 | * | |
560 | * Return: 0 on success, otherwise error | |
561 | */ | |
562 | int ksmbd_vfs_fsync(struct ksmbd_work *work, uint64_t fid, uint64_t p_id) | |
563 | { | |
564 | struct ksmbd_file *fp; | |
565 | int err; | |
566 | ||
567 | fp = ksmbd_lookup_fd_slow(work, fid, p_id); | |
568 | if (!fp) { | |
569 | ksmbd_err("failed to get filp for fid %llu\n", fid); | |
570 | return -ENOENT; | |
571 | } | |
572 | err = vfs_fsync(fp->filp, 0); | |
573 | if (err < 0) | |
574 | ksmbd_err("smb fsync failed, err = %d\n", err); | |
575 | ksmbd_fd_put(work, fp); | |
576 | return err; | |
577 | } | |
578 | ||
579 | /** | |
580 | * ksmbd_vfs_remove_file() - vfs helper for smb rmdir or unlink | |
581 | * @name: absolute directory or file name | |
582 | * | |
583 | * Return: 0 on success, otherwise error | |
584 | */ | |
585 | int ksmbd_vfs_remove_file(struct ksmbd_work *work, char *name) | |
586 | { | |
587 | struct path parent; | |
588 | struct dentry *dir, *dentry; | |
589 | char *last; | |
590 | int err = -ENOENT; | |
591 | ||
592 | last = extract_last_component(name); | |
593 | if (!last) | |
594 | return -ENOENT; | |
595 | ||
596 | if (ksmbd_override_fsids(work)) | |
597 | return -ENOMEM; | |
598 | ||
599 | err = kern_path(name, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, &parent); | |
600 | if (err) { | |
601 | ksmbd_debug(VFS, "can't get %s, err %d\n", name, err); | |
602 | ksmbd_revert_fsids(work); | |
603 | rollback_path_modification(last); | |
604 | return err; | |
605 | } | |
606 | ||
607 | dir = parent.dentry; | |
608 | if (!d_inode(dir)) | |
609 | goto out; | |
610 | ||
611 | inode_lock_nested(d_inode(dir), I_MUTEX_PARENT); | |
612 | dentry = lookup_one_len(last, dir, strlen(last)); | |
613 | if (IS_ERR(dentry)) { | |
614 | err = PTR_ERR(dentry); | |
615 | ksmbd_debug(VFS, "%s: lookup failed, err %d\n", last, err); | |
616 | goto out_err; | |
617 | } | |
618 | ||
619 | if (!d_inode(dentry) || !d_inode(dentry)->i_nlink) { | |
620 | dput(dentry); | |
621 | err = -ENOENT; | |
622 | goto out_err; | |
623 | } | |
624 | ||
625 | if (S_ISDIR(d_inode(dentry)->i_mode)) { | |
626 | err = vfs_rmdir(&init_user_ns, d_inode(dir), dentry); | |
627 | if (err && err != -ENOTEMPTY) | |
628 | ksmbd_debug(VFS, "%s: rmdir failed, err %d\n", name, | |
629 | err); | |
630 | } else { | |
631 | err = vfs_unlink(&init_user_ns, d_inode(dir), dentry, NULL); | |
632 | if (err) | |
633 | ksmbd_debug(VFS, "%s: unlink failed, err %d\n", name, | |
634 | err); | |
635 | } | |
636 | ||
637 | dput(dentry); | |
638 | out_err: | |
639 | inode_unlock(d_inode(dir)); | |
640 | out: | |
641 | rollback_path_modification(last); | |
642 | path_put(&parent); | |
643 | ksmbd_revert_fsids(work); | |
644 | return err; | |
645 | } | |
646 | ||
647 | /** | |
648 | * ksmbd_vfs_link() - vfs helper for creating smb hardlink | |
649 | * @oldname: source file name | |
650 | * @newname: hardlink name | |
651 | * | |
652 | * Return: 0 on success, otherwise error | |
653 | */ | |
654 | int ksmbd_vfs_link(struct ksmbd_work *work, | |
655 | const char *oldname, const char *newname) | |
656 | { | |
657 | struct path oldpath, newpath; | |
658 | struct dentry *dentry; | |
659 | int err; | |
660 | ||
661 | if (ksmbd_override_fsids(work)) | |
662 | return -ENOMEM; | |
663 | ||
664 | err = kern_path(oldname, LOOKUP_FOLLOW, &oldpath); | |
665 | if (err) { | |
666 | ksmbd_err("cannot get linux path for %s, err = %d\n", | |
667 | oldname, err); | |
668 | goto out1; | |
669 | } | |
670 | ||
671 | dentry = kern_path_create(AT_FDCWD, newname, &newpath, | |
672 | LOOKUP_FOLLOW | LOOKUP_REVAL); | |
673 | if (IS_ERR(dentry)) { | |
674 | err = PTR_ERR(dentry); | |
675 | ksmbd_err("path create err for %s, err %d\n", newname, err); | |
676 | goto out2; | |
677 | } | |
678 | ||
679 | err = -EXDEV; | |
680 | if (oldpath.mnt != newpath.mnt) { | |
681 | ksmbd_err("vfs_link failed err %d\n", err); | |
682 | goto out3; | |
683 | } | |
684 | ||
685 | err = vfs_link(oldpath.dentry, &init_user_ns, d_inode(newpath.dentry), | |
686 | dentry, NULL); | |
687 | if (err) | |
688 | ksmbd_debug(VFS, "vfs_link failed err %d\n", err); | |
689 | ||
690 | out3: | |
691 | done_path_create(&newpath, dentry); | |
692 | out2: | |
693 | path_put(&oldpath); | |
694 | out1: | |
695 | ksmbd_revert_fsids(work); | |
696 | return err; | |
697 | } | |
698 | ||
699 | static int __ksmbd_vfs_rename(struct ksmbd_work *work, | |
700 | struct dentry *src_dent_parent, | |
701 | struct dentry *src_dent, | |
702 | struct dentry *dst_dent_parent, | |
703 | struct dentry *trap_dent, | |
704 | char *dst_name) | |
705 | { | |
706 | struct dentry *dst_dent; | |
707 | int err; | |
708 | ||
709 | spin_lock(&src_dent->d_lock); | |
710 | list_for_each_entry(dst_dent, &src_dent->d_subdirs, d_child) { | |
711 | struct ksmbd_file *child_fp; | |
712 | ||
713 | if (d_really_is_negative(dst_dent)) | |
714 | continue; | |
715 | ||
716 | child_fp = ksmbd_lookup_fd_inode(d_inode(dst_dent)); | |
717 | if (child_fp) { | |
718 | spin_unlock(&src_dent->d_lock); | |
719 | ksmbd_debug(VFS, "Forbid rename, sub file/dir is in use\n"); | |
720 | return -EACCES; | |
721 | } | |
722 | } | |
723 | spin_unlock(&src_dent->d_lock); | |
724 | ||
725 | if (d_really_is_negative(src_dent_parent)) | |
726 | return -ENOENT; | |
727 | if (d_really_is_negative(dst_dent_parent)) | |
728 | return -ENOENT; | |
729 | if (d_really_is_negative(src_dent)) | |
730 | return -ENOENT; | |
731 | if (src_dent == trap_dent) | |
732 | return -EINVAL; | |
733 | ||
734 | if (ksmbd_override_fsids(work)) | |
735 | return -ENOMEM; | |
736 | ||
737 | dst_dent = lookup_one_len(dst_name, dst_dent_parent, strlen(dst_name)); | |
738 | err = PTR_ERR(dst_dent); | |
739 | if (IS_ERR(dst_dent)) { | |
740 | ksmbd_err("lookup failed %s [%d]\n", dst_name, err); | |
741 | goto out; | |
742 | } | |
743 | ||
744 | err = -ENOTEMPTY; | |
745 | if (dst_dent != trap_dent && !d_really_is_positive(dst_dent)) { | |
746 | struct renamedata rd = { | |
747 | .old_mnt_userns = &init_user_ns, | |
748 | .old_dir = d_inode(src_dent_parent), | |
749 | .old_dentry = src_dent, | |
750 | .new_mnt_userns = &init_user_ns, | |
751 | .new_dir = d_inode(dst_dent_parent), | |
752 | .new_dentry = dst_dent, | |
753 | }; | |
754 | err = vfs_rename(&rd); | |
755 | } | |
756 | if (err) | |
757 | ksmbd_err("vfs_rename failed err %d\n", err); | |
758 | if (dst_dent) | |
759 | dput(dst_dent); | |
760 | out: | |
761 | ksmbd_revert_fsids(work); | |
762 | return err; | |
763 | } | |
764 | ||
765 | int ksmbd_vfs_fp_rename(struct ksmbd_work *work, struct ksmbd_file *fp, | |
766 | char *newname) | |
767 | { | |
768 | struct path dst_path; | |
769 | struct dentry *src_dent_parent, *dst_dent_parent; | |
770 | struct dentry *src_dent, *trap_dent; | |
771 | char *dst_name; | |
772 | int err; | |
773 | ||
774 | dst_name = extract_last_component(newname); | |
775 | if (!dst_name) | |
776 | return -EINVAL; | |
777 | ||
778 | src_dent_parent = dget_parent(fp->filp->f_path.dentry); | |
779 | if (!src_dent_parent) | |
780 | return -EINVAL; | |
781 | ||
782 | src_dent = fp->filp->f_path.dentry; | |
783 | dget(src_dent); | |
784 | ||
785 | err = kern_path(newname, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, &dst_path); | |
786 | if (err) { | |
787 | ksmbd_debug(VFS, "Cannot get path for %s [%d]\n", newname, err); | |
788 | goto out; | |
789 | } | |
790 | dst_dent_parent = dst_path.dentry; | |
791 | dget(dst_dent_parent); | |
792 | ||
793 | trap_dent = lock_rename(src_dent_parent, dst_dent_parent); | |
794 | err = __ksmbd_vfs_rename(work, | |
795 | src_dent_parent, | |
796 | src_dent, | |
797 | dst_dent_parent, | |
798 | trap_dent, | |
799 | dst_name); | |
800 | unlock_rename(src_dent_parent, dst_dent_parent); | |
801 | dput(dst_dent_parent); | |
802 | path_put(&dst_path); | |
803 | out: | |
804 | dput(src_dent); | |
805 | dput(src_dent_parent); | |
806 | return err; | |
807 | } | |
808 | ||
809 | /** | |
810 | * ksmbd_vfs_truncate() - vfs helper for smb file truncate | |
811 | * @work: work | |
812 | * @name: old filename | |
813 | * @fid: file id of old file | |
814 | * @size: truncate to given size | |
815 | * | |
816 | * Return: 0 on success, otherwise error | |
817 | */ | |
818 | int ksmbd_vfs_truncate(struct ksmbd_work *work, const char *name, | |
819 | struct ksmbd_file *fp, loff_t size) | |
820 | { | |
821 | struct path path; | |
822 | int err = 0; | |
823 | struct inode *inode; | |
824 | ||
825 | if (name) { | |
826 | err = kern_path(name, 0, &path); | |
827 | if (err) { | |
828 | ksmbd_err("cannot get linux path for %s, err %d\n", | |
829 | name, err); | |
830 | return err; | |
831 | } | |
832 | err = vfs_truncate(&path, size); | |
833 | if (err) | |
834 | ksmbd_err("truncate failed for %s err %d\n", | |
835 | name, err); | |
836 | path_put(&path); | |
837 | } else { | |
838 | struct file *filp; | |
839 | ||
840 | filp = fp->filp; | |
841 | ||
842 | /* Do we need to break any of a levelII oplock? */ | |
843 | smb_break_all_levII_oplock(work, fp, 1); | |
844 | ||
845 | inode = file_inode(filp); | |
846 | if (size < inode->i_size) { | |
847 | err = check_lock_range(filp, size, | |
848 | inode->i_size - 1, WRITE); | |
849 | } else { | |
850 | err = check_lock_range(filp, inode->i_size, | |
851 | size - 1, WRITE); | |
852 | } | |
853 | ||
854 | if (err) { | |
855 | ksmbd_err("failed due to lock\n"); | |
856 | return -EAGAIN; | |
857 | } | |
858 | ||
859 | err = vfs_truncate(&filp->f_path, size); | |
860 | if (err) | |
861 | ksmbd_err("truncate failed for filename : %s err %d\n", | |
862 | fp->filename, err); | |
863 | } | |
864 | ||
865 | return err; | |
866 | } | |
867 | ||
868 | /** | |
869 | * ksmbd_vfs_listxattr() - vfs helper for smb list extended attributes | |
870 | * @dentry: dentry of file for listing xattrs | |
871 | * @list: destination buffer | |
872 | * @size: destination buffer length | |
873 | * | |
874 | * Return: xattr list length on success, otherwise error | |
875 | */ | |
876 | ssize_t ksmbd_vfs_listxattr(struct dentry *dentry, char **list) | |
877 | { | |
878 | ssize_t size; | |
879 | char *vlist = NULL; | |
880 | ||
881 | size = vfs_listxattr(dentry, NULL, 0); | |
882 | if (size <= 0) | |
883 | return size; | |
884 | ||
885 | vlist = ksmbd_alloc(size); | |
886 | if (!vlist) | |
887 | return -ENOMEM; | |
888 | ||
889 | *list = vlist; | |
890 | size = vfs_listxattr(dentry, vlist, size); | |
891 | if (size < 0) { | |
892 | ksmbd_debug(VFS, "listxattr failed\n"); | |
893 | ksmbd_vfs_xattr_free(vlist); | |
894 | *list = NULL; | |
895 | } | |
896 | ||
897 | return size; | |
898 | } | |
899 | ||
900 | static ssize_t ksmbd_vfs_xattr_len(struct dentry *dentry, | |
901 | char *xattr_name) | |
902 | { | |
903 | return vfs_getxattr(&init_user_ns, dentry, xattr_name, NULL, 0); | |
904 | } | |
905 | ||
906 | /** | |
907 | * ksmbd_vfs_getxattr() - vfs helper for smb get extended attributes value | |
908 | * @dentry: dentry of file for getting xattrs | |
909 | * @xattr_name: name of xattr name to query | |
910 | * @xattr_buf: destination buffer xattr value | |
911 | * | |
912 | * Return: read xattr value length on success, otherwise error | |
913 | */ | |
914 | ssize_t ksmbd_vfs_getxattr(struct dentry *dentry, | |
915 | char *xattr_name, | |
916 | char **xattr_buf) | |
917 | { | |
918 | ssize_t xattr_len; | |
919 | char *buf; | |
920 | ||
921 | *xattr_buf = NULL; | |
922 | xattr_len = ksmbd_vfs_xattr_len(dentry, xattr_name); | |
923 | if (xattr_len < 0) | |
924 | return xattr_len; | |
925 | ||
926 | buf = kmalloc(xattr_len + 1, GFP_KERNEL); | |
927 | if (!buf) | |
928 | return -ENOMEM; | |
929 | ||
930 | xattr_len = vfs_getxattr(&init_user_ns, dentry, xattr_name, (void *)buf, | |
931 | xattr_len); | |
932 | if (xattr_len > 0) | |
933 | *xattr_buf = buf; | |
934 | else | |
935 | kfree(buf); | |
936 | return xattr_len; | |
937 | } | |
938 | ||
939 | /** | |
940 | * ksmbd_vfs_setxattr() - vfs helper for smb set extended attributes value | |
941 | * @dentry: dentry to set XATTR at | |
942 | * @name: xattr name for setxattr | |
943 | * @value: xattr value to set | |
944 | * @size: size of xattr value | |
945 | * @flags: destination buffer length | |
946 | * | |
947 | * Return: 0 on success, otherwise error | |
948 | */ | |
949 | int ksmbd_vfs_setxattr(struct dentry *dentry, | |
950 | const char *attr_name, | |
951 | const void *attr_value, | |
952 | size_t attr_size, | |
953 | int flags) | |
954 | { | |
955 | int err; | |
956 | ||
957 | err = vfs_setxattr(&init_user_ns, dentry, | |
958 | attr_name, | |
959 | attr_value, | |
960 | attr_size, | |
961 | flags); | |
962 | if (err) | |
963 | ksmbd_debug(VFS, "setxattr failed, err %d\n", err); | |
964 | return err; | |
965 | } | |
966 | ||
967 | /** | |
968 | * ksmbd_vfs_set_fadvise() - convert smb IO caching options to linux options | |
969 | * @filp: file pointer for IO | |
970 | * @options: smb IO options | |
971 | */ | |
972 | void ksmbd_vfs_set_fadvise(struct file *filp, __le32 option) | |
973 | { | |
974 | struct address_space *mapping; | |
975 | ||
976 | mapping = filp->f_mapping; | |
977 | ||
978 | if (!option || !mapping) | |
979 | return; | |
980 | ||
981 | if (option & FILE_WRITE_THROUGH_LE) | |
982 | filp->f_flags |= O_SYNC; | |
983 | else if (option & FILE_SEQUENTIAL_ONLY_LE) { | |
984 | filp->f_ra.ra_pages = inode_to_bdi(mapping->host)->ra_pages * 2; | |
985 | spin_lock(&filp->f_lock); | |
986 | filp->f_mode &= ~FMODE_RANDOM; | |
987 | spin_unlock(&filp->f_lock); | |
988 | } else if (option & FILE_RANDOM_ACCESS_LE) { | |
989 | spin_lock(&filp->f_lock); | |
990 | filp->f_mode |= FMODE_RANDOM; | |
991 | spin_unlock(&filp->f_lock); | |
992 | } | |
993 | } | |
994 | ||
995 | /** | |
996 | * ksmbd_vfs_lock() - vfs helper for smb file locking | |
997 | * @filp: the file to apply the lock to | |
998 | * @cmd: type of locking operation (F_SETLK, F_GETLK, etc.) | |
999 | * @flock: The lock to be applied | |
1000 | * | |
1001 | * Return: 0 on success, otherwise error | |
1002 | */ | |
1003 | int ksmbd_vfs_lock(struct file *filp, int cmd, | |
1004 | struct file_lock *flock) | |
1005 | { | |
1006 | ksmbd_debug(VFS, "calling vfs_lock_file\n"); | |
1007 | return vfs_lock_file(filp, cmd, flock, NULL); | |
1008 | } | |
1009 | ||
1010 | int ksmbd_vfs_readdir(struct file *file, struct ksmbd_readdir_data *rdata) | |
1011 | { | |
1012 | return iterate_dir(file, &rdata->ctx); | |
1013 | } | |
1014 | ||
1015 | int ksmbd_vfs_alloc_size(struct ksmbd_work *work, | |
1016 | struct ksmbd_file *fp, | |
1017 | loff_t len) | |
1018 | { | |
1019 | smb_break_all_levII_oplock(work, fp, 1); | |
1020 | return vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0, len); | |
1021 | } | |
1022 | ||
1023 | int ksmbd_vfs_zero_data(struct ksmbd_work *work, | |
1024 | struct ksmbd_file *fp, | |
1025 | loff_t off, | |
1026 | loff_t len) | |
1027 | { | |
1028 | smb_break_all_levII_oplock(work, fp, 1); | |
1029 | if (fp->f_ci->m_fattr & ATTR_SPARSE_FILE_LE) | |
1030 | return vfs_fallocate(fp->filp, | |
1031 | FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, off, len); | |
1032 | ||
1033 | return vfs_fallocate(fp->filp, FALLOC_FL_ZERO_RANGE, off, len); | |
1034 | } | |
1035 | ||
1036 | int ksmbd_vfs_fqar_lseek(struct ksmbd_file *fp, loff_t start, loff_t length, | |
1037 | struct file_allocated_range_buffer *ranges, | |
1038 | int in_count, int *out_count) | |
1039 | { | |
1040 | struct file *f = fp->filp; | |
1041 | struct inode *inode = FP_INODE(fp); | |
1042 | loff_t maxbytes = (u64)inode->i_sb->s_maxbytes, end; | |
1043 | loff_t extent_start, extent_end; | |
1044 | int ret = 0; | |
1045 | ||
1046 | if (start > maxbytes) | |
1047 | return -EFBIG; | |
1048 | ||
1049 | if (!in_count) | |
1050 | return 0; | |
1051 | ||
1052 | /* | |
1053 | * Shrink request scope to what the fs can actually handle. | |
1054 | */ | |
1055 | if (length > maxbytes || (maxbytes - length) < start) | |
1056 | length = maxbytes - start; | |
1057 | ||
1058 | if (start + length > inode->i_size) | |
1059 | length = inode->i_size - start; | |
1060 | ||
1061 | *out_count = 0; | |
1062 | end = start + length; | |
1063 | while (start < end && *out_count < in_count) { | |
1064 | extent_start = f->f_op->llseek(f, start, SEEK_DATA); | |
1065 | if (extent_start < 0) { | |
1066 | if (extent_start != -ENXIO) | |
1067 | ret = (int)extent_start; | |
1068 | break; | |
1069 | } | |
1070 | ||
1071 | if (extent_start >= end) | |
1072 | break; | |
1073 | ||
1074 | extent_end = f->f_op->llseek(f, extent_start, SEEK_HOLE); | |
1075 | if (extent_end < 0) { | |
1076 | if (extent_end != -ENXIO) | |
1077 | ret = (int)extent_end; | |
1078 | break; | |
1079 | } else if (extent_start >= extent_end) | |
1080 | break; | |
1081 | ||
1082 | ranges[*out_count].file_offset = cpu_to_le64(extent_start); | |
1083 | ranges[(*out_count)++].length = | |
1084 | cpu_to_le64(min(extent_end, end) - extent_start); | |
1085 | ||
1086 | start = extent_end; | |
1087 | } | |
1088 | ||
1089 | return ret; | |
1090 | } | |
1091 | ||
1092 | int ksmbd_vfs_remove_xattr(struct dentry *dentry, char *attr_name) | |
1093 | { | |
1094 | return vfs_removexattr(&init_user_ns, dentry, attr_name); | |
1095 | } | |
1096 | ||
1097 | void ksmbd_vfs_xattr_free(char *xattr) | |
1098 | { | |
1099 | ksmbd_free(xattr); | |
1100 | } | |
1101 | ||
1102 | int ksmbd_vfs_unlink(struct dentry *dir, struct dentry *dentry) | |
1103 | { | |
1104 | int err = 0; | |
1105 | ||
1106 | dget(dentry); | |
1107 | inode_lock_nested(d_inode(dir), I_MUTEX_PARENT); | |
1108 | if (!d_inode(dentry) || !d_inode(dentry)->i_nlink) { | |
1109 | err = -ENOENT; | |
1110 | goto out; | |
1111 | } | |
1112 | ||
1113 | if (S_ISDIR(d_inode(dentry)->i_mode)) | |
1114 | err = vfs_rmdir(&init_user_ns, d_inode(dir), dentry); | |
1115 | else | |
1116 | err = vfs_unlink(&init_user_ns, d_inode(dir), dentry, NULL); | |
1117 | ||
1118 | out: | |
1119 | inode_unlock(d_inode(dir)); | |
1120 | dput(dentry); | |
1121 | if (err) | |
1122 | ksmbd_debug(VFS, "failed to delete, err %d\n", err); | |
1123 | ||
1124 | return err; | |
1125 | } | |
1126 | ||
1127 | /* | |
1128 | * ksmbd_vfs_get_logical_sector_size() - get logical sector size from inode | |
1129 | * @inode: inode | |
1130 | * | |
1131 | * Return: logical sector size | |
1132 | */ | |
1133 | unsigned short ksmbd_vfs_logical_sector_size(struct inode *inode) | |
1134 | { | |
1135 | struct request_queue *q; | |
1136 | unsigned short ret_val = 512; | |
1137 | ||
1138 | if (!inode->i_sb->s_bdev) | |
1139 | return ret_val; | |
1140 | ||
1141 | q = inode->i_sb->s_bdev->bd_disk->queue; | |
1142 | ||
1143 | if (q && q->limits.logical_block_size) | |
1144 | ret_val = q->limits.logical_block_size; | |
1145 | ||
1146 | return ret_val; | |
1147 | } | |
1148 | ||
1149 | /* | |
1150 | * ksmbd_vfs_get_smb2_sector_size() - get fs sector sizes | |
1151 | * @inode: inode | |
1152 | * @fs_ss: fs sector size struct | |
1153 | */ | |
1154 | void ksmbd_vfs_smb2_sector_size(struct inode *inode, | |
1155 | struct ksmbd_fs_sector_size *fs_ss) | |
1156 | { | |
1157 | struct request_queue *q; | |
1158 | ||
1159 | fs_ss->logical_sector_size = 512; | |
1160 | fs_ss->physical_sector_size = 512; | |
1161 | fs_ss->optimal_io_size = 512; | |
1162 | ||
1163 | if (!inode->i_sb->s_bdev) | |
1164 | return; | |
1165 | ||
1166 | q = inode->i_sb->s_bdev->bd_disk->queue; | |
1167 | ||
1168 | if (q) { | |
1169 | if (q->limits.logical_block_size) | |
1170 | fs_ss->logical_sector_size = | |
1171 | q->limits.logical_block_size; | |
1172 | if (q->limits.physical_block_size) | |
1173 | fs_ss->physical_sector_size = | |
1174 | q->limits.physical_block_size; | |
1175 | if (q->limits.io_opt) | |
1176 | fs_ss->optimal_io_size = q->limits.io_opt; | |
1177 | } | |
1178 | } | |
1179 | ||
1180 | static int __dir_empty(struct dir_context *ctx, | |
1181 | const char *name, | |
1182 | int namlen, | |
1183 | loff_t offset, | |
1184 | u64 ino, | |
1185 | unsigned int d_type) | |
1186 | { | |
1187 | struct ksmbd_readdir_data *buf; | |
1188 | ||
1189 | buf = container_of(ctx, struct ksmbd_readdir_data, ctx); | |
1190 | buf->dirent_count++; | |
1191 | ||
1192 | if (buf->dirent_count > 2) | |
1193 | return -ENOTEMPTY; | |
1194 | return 0; | |
1195 | } | |
1196 | ||
1197 | /** | |
1198 | * ksmbd_vfs_empty_dir() - check for empty directory | |
1199 | * @fp: ksmbd file pointer | |
1200 | * | |
1201 | * Return: true if directory empty, otherwise false | |
1202 | */ | |
1203 | int ksmbd_vfs_empty_dir(struct ksmbd_file *fp) | |
1204 | { | |
1205 | int err; | |
1206 | struct ksmbd_readdir_data readdir_data; | |
1207 | ||
1208 | memset(&readdir_data, 0, sizeof(struct ksmbd_readdir_data)); | |
1209 | ||
1210 | set_ctx_actor(&readdir_data.ctx, __dir_empty); | |
1211 | readdir_data.dirent_count = 0; | |
1212 | ||
1213 | err = ksmbd_vfs_readdir(fp->filp, &readdir_data); | |
1214 | if (readdir_data.dirent_count > 2) | |
1215 | err = -ENOTEMPTY; | |
1216 | else | |
1217 | err = 0; | |
1218 | return err; | |
1219 | } | |
1220 | ||
1221 | static int __caseless_lookup(struct dir_context *ctx, | |
1222 | const char *name, | |
1223 | int namlen, | |
1224 | loff_t offset, | |
1225 | u64 ino, | |
1226 | unsigned int d_type) | |
1227 | { | |
1228 | struct ksmbd_readdir_data *buf; | |
1229 | ||
1230 | buf = container_of(ctx, struct ksmbd_readdir_data, ctx); | |
1231 | ||
1232 | if (buf->used != namlen) | |
1233 | return 0; | |
1234 | if (!strncasecmp((char *)buf->private, name, namlen)) { | |
1235 | memcpy((char *)buf->private, name, namlen); | |
1236 | buf->dirent_count = 1; | |
1237 | return -EEXIST; | |
1238 | } | |
1239 | return 0; | |
1240 | } | |
1241 | ||
1242 | /** | |
1243 | * ksmbd_vfs_lookup_in_dir() - lookup a file in a directory | |
1244 | * @dirname: directory name | |
1245 | * @filename: filename to lookup | |
1246 | * | |
1247 | * Return: 0 on success, otherwise error | |
1248 | */ | |
1249 | static int ksmbd_vfs_lookup_in_dir(char *dirname, char *filename) | |
1250 | { | |
1251 | struct path dir_path; | |
1252 | int ret; | |
1253 | struct file *dfilp; | |
1254 | int flags = O_RDONLY|O_LARGEFILE; | |
1255 | int dirnamelen = strlen(dirname); | |
1256 | struct ksmbd_readdir_data readdir_data = { | |
1257 | .ctx.actor = __caseless_lookup, | |
1258 | .private = filename, | |
1259 | .used = strlen(filename), | |
1260 | }; | |
1261 | ||
1262 | ret = ksmbd_vfs_kern_path(dirname, 0, &dir_path, true); | |
1263 | if (ret) | |
1264 | goto error; | |
1265 | ||
1266 | dfilp = dentry_open(&dir_path, flags, current_cred()); | |
1267 | if (IS_ERR(dfilp)) { | |
1268 | path_put(&dir_path); | |
1269 | ksmbd_err("cannot open directory %s\n", dirname); | |
1270 | ret = -EINVAL; | |
1271 | goto error; | |
1272 | } | |
1273 | ||
1274 | ret = ksmbd_vfs_readdir(dfilp, &readdir_data); | |
1275 | if (readdir_data.dirent_count > 0) | |
1276 | ret = 0; | |
1277 | ||
1278 | fput(dfilp); | |
1279 | path_put(&dir_path); | |
1280 | error: | |
1281 | dirname[dirnamelen] = '/'; | |
1282 | return ret; | |
1283 | } | |
1284 | ||
1285 | /** | |
1286 | * ksmbd_vfs_kern_path() - lookup a file and get path info | |
1287 | * @name: name of file for lookup | |
1288 | * @flags: lookup flags | |
1289 | * @path: if lookup succeed, return path info | |
1290 | * @caseless: caseless filename lookup | |
1291 | * | |
1292 | * Return: 0 on success, otherwise error | |
1293 | */ | |
1294 | int ksmbd_vfs_kern_path(char *name, unsigned int flags, struct path *path, | |
1295 | bool caseless) | |
1296 | { | |
1297 | char *filename = NULL; | |
1298 | int err; | |
1299 | ||
1300 | err = kern_path(name, flags, path); | |
1301 | if (!err) | |
1302 | return err; | |
1303 | ||
1304 | if (caseless) { | |
1305 | filename = extract_last_component(name); | |
1306 | if (!filename) | |
1307 | goto out; | |
1308 | ||
1309 | /* root reached */ | |
1310 | if (strlen(name) == 0) | |
1311 | goto out; | |
1312 | ||
1313 | err = ksmbd_vfs_lookup_in_dir(name, filename); | |
1314 | if (err) | |
1315 | goto out; | |
1316 | err = kern_path(name, flags, path); | |
1317 | } | |
1318 | ||
1319 | out: | |
1320 | rollback_path_modification(filename); | |
1321 | return err; | |
1322 | } | |
1323 | ||
1324 | int ksmbd_vfs_remove_acl_xattrs(struct dentry *dentry) | |
1325 | { | |
1326 | char *name, *xattr_list = NULL; | |
1327 | ssize_t xattr_list_len; | |
1328 | int err = 0; | |
1329 | ||
1330 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
1331 | if (xattr_list_len < 0) { | |
1332 | goto out; | |
1333 | } else if (!xattr_list_len) { | |
1334 | ksmbd_debug(SMB, "empty xattr in the file\n"); | |
1335 | goto out; | |
1336 | } | |
1337 | ||
1338 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
1339 | name += strlen(name) + 1) { | |
1340 | ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name)); | |
1341 | ||
1342 | if (!strncmp(name, XATTR_NAME_POSIX_ACL_ACCESS, | |
1343 | sizeof(XATTR_NAME_POSIX_ACL_ACCESS)-1) || | |
1344 | !strncmp(name, XATTR_NAME_POSIX_ACL_DEFAULT, | |
1345 | sizeof(XATTR_NAME_POSIX_ACL_DEFAULT)-1)) { | |
1346 | err = ksmbd_vfs_remove_xattr(dentry, name); | |
1347 | if (err) | |
1348 | ksmbd_debug(SMB, | |
1349 | "remove acl xattr failed : %s\n", name); | |
1350 | } | |
1351 | } | |
1352 | out: | |
1353 | ksmbd_vfs_xattr_free(xattr_list); | |
1354 | return err; | |
1355 | } | |
1356 | ||
1357 | int ksmbd_vfs_remove_sd_xattrs(struct dentry *dentry) | |
1358 | { | |
1359 | char *name, *xattr_list = NULL; | |
1360 | ssize_t xattr_list_len; | |
1361 | int err = 0; | |
1362 | ||
1363 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
1364 | if (xattr_list_len < 0) { | |
1365 | goto out; | |
1366 | } else if (!xattr_list_len) { | |
1367 | ksmbd_debug(SMB, "empty xattr in the file\n"); | |
1368 | goto out; | |
1369 | } | |
1370 | ||
1371 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
1372 | name += strlen(name) + 1) { | |
1373 | ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name)); | |
1374 | ||
1375 | if (!strncmp(name, XATTR_NAME_SD, XATTR_NAME_SD_LEN)) { | |
1376 | err = ksmbd_vfs_remove_xattr(dentry, name); | |
1377 | if (err) | |
1378 | ksmbd_debug(SMB, "remove xattr failed : %s\n", name); | |
1379 | } | |
1380 | } | |
1381 | out: | |
1382 | ksmbd_vfs_xattr_free(xattr_list); | |
1383 | return err; | |
1384 | } | |
1385 | ||
1386 | static struct xattr_smb_acl *ksmbd_vfs_make_xattr_posix_acl(struct inode *inode, | |
1387 | int acl_type) | |
1388 | { | |
1389 | struct xattr_smb_acl *smb_acl = NULL; | |
1390 | struct posix_acl *posix_acls; | |
1391 | struct posix_acl_entry *pa_entry; | |
1392 | struct xattr_acl_entry *xa_entry; | |
1393 | int i; | |
1394 | ||
1395 | posix_acls = ksmbd_vfs_get_acl(inode, acl_type); | |
1396 | if (!posix_acls) | |
1397 | return NULL; | |
1398 | ||
1399 | smb_acl = kzalloc(sizeof(struct xattr_smb_acl) + | |
1400 | sizeof(struct xattr_acl_entry) * posix_acls->a_count, | |
1401 | GFP_KERNEL); | |
1402 | if (!smb_acl) | |
1403 | goto out; | |
1404 | ||
1405 | smb_acl->count = posix_acls->a_count; | |
1406 | pa_entry = posix_acls->a_entries; | |
1407 | xa_entry = smb_acl->entries; | |
1408 | for (i = 0; i < posix_acls->a_count; i++, pa_entry++, xa_entry++) { | |
1409 | switch (pa_entry->e_tag) { | |
1410 | case ACL_USER: | |
1411 | xa_entry->type = SMB_ACL_USER; | |
1412 | xa_entry->uid = from_kuid(&init_user_ns, pa_entry->e_uid); | |
1413 | break; | |
1414 | case ACL_USER_OBJ: | |
1415 | xa_entry->type = SMB_ACL_USER_OBJ; | |
1416 | break; | |
1417 | case ACL_GROUP: | |
1418 | xa_entry->type = SMB_ACL_GROUP; | |
1419 | xa_entry->gid = from_kgid(&init_user_ns, pa_entry->e_gid); | |
1420 | break; | |
1421 | case ACL_GROUP_OBJ: | |
1422 | xa_entry->type = SMB_ACL_GROUP_OBJ; | |
1423 | break; | |
1424 | case ACL_OTHER: | |
1425 | xa_entry->type = SMB_ACL_OTHER; | |
1426 | break; | |
1427 | case ACL_MASK: | |
1428 | xa_entry->type = SMB_ACL_MASK; | |
1429 | break; | |
1430 | default: | |
1431 | ksmbd_err("unknown type : 0x%x\n", pa_entry->e_tag); | |
1432 | goto out; | |
1433 | } | |
1434 | ||
1435 | if (pa_entry->e_perm & ACL_READ) | |
1436 | xa_entry->perm |= SMB_ACL_READ; | |
1437 | if (pa_entry->e_perm & ACL_WRITE) | |
1438 | xa_entry->perm |= SMB_ACL_WRITE; | |
1439 | if (pa_entry->e_perm & ACL_EXECUTE) | |
1440 | xa_entry->perm |= SMB_ACL_EXECUTE; | |
1441 | } | |
1442 | out: | |
1443 | posix_acl_release(posix_acls); | |
1444 | return smb_acl; | |
1445 | } | |
1446 | ||
1447 | int ksmbd_vfs_set_sd_xattr(struct ksmbd_conn *conn, struct dentry *dentry, | |
1448 | struct smb_ntsd *pntsd, int len) | |
1449 | { | |
1450 | int rc; | |
1451 | struct ndr sd_ndr = {0}, acl_ndr = {0}; | |
1452 | struct xattr_ntacl acl = {0}; | |
1453 | struct xattr_smb_acl *smb_acl, *def_smb_acl = NULL; | |
1454 | struct inode *inode = dentry->d_inode; | |
1455 | ||
1456 | acl.version = 4; | |
1457 | acl.hash_type = XATTR_SD_HASH_TYPE_SHA256; | |
1458 | acl.current_time = ksmbd_UnixTimeToNT(current_time(dentry->d_inode)); | |
1459 | ||
1460 | memcpy(acl.desc, "posix_acl", 9); | |
1461 | acl.desc_len = 10; | |
1462 | ||
1463 | pntsd->osidoffset = | |
1464 | cpu_to_le32(le32_to_cpu(pntsd->osidoffset) + NDR_NTSD_OFFSETOF); | |
1465 | pntsd->gsidoffset = | |
1466 | cpu_to_le32(le32_to_cpu(pntsd->gsidoffset) + NDR_NTSD_OFFSETOF); | |
1467 | pntsd->dacloffset = | |
1468 | cpu_to_le32(le32_to_cpu(pntsd->dacloffset) + NDR_NTSD_OFFSETOF); | |
1469 | ||
1470 | acl.sd_buf = (char *)pntsd; | |
1471 | acl.sd_size = len; | |
1472 | ||
1473 | rc = ksmbd_gen_sd_hash(conn, acl.sd_buf, acl.sd_size, acl.hash); | |
1474 | if (rc) { | |
1475 | ksmbd_err("failed to generate hash for ndr acl\n"); | |
1476 | return rc; | |
1477 | } | |
1478 | ||
1479 | smb_acl = ksmbd_vfs_make_xattr_posix_acl(dentry->d_inode, ACL_TYPE_ACCESS); | |
1480 | if (S_ISDIR(inode->i_mode)) | |
1481 | def_smb_acl = ksmbd_vfs_make_xattr_posix_acl(dentry->d_inode, | |
1482 | ACL_TYPE_DEFAULT); | |
1483 | ||
1484 | rc = ndr_encode_posix_acl(&acl_ndr, inode, smb_acl, def_smb_acl); | |
1485 | if (rc) { | |
1486 | ksmbd_err("failed to encode ndr to posix acl\n"); | |
1487 | goto out; | |
1488 | } | |
1489 | ||
1490 | rc = ksmbd_gen_sd_hash(conn, acl_ndr.data, acl_ndr.offset, | |
1491 | acl.posix_acl_hash); | |
1492 | if (rc) { | |
1493 | ksmbd_err("failed to generate hash for ndr acl\n"); | |
1494 | goto out; | |
1495 | } | |
1496 | ||
1497 | rc = ndr_encode_v4_ntacl(&sd_ndr, &acl); | |
1498 | if (rc) { | |
1499 | ksmbd_err("failed to encode ndr to posix acl\n"); | |
1500 | goto out; | |
1501 | } | |
1502 | ||
1503 | rc = ksmbd_vfs_setxattr(dentry, XATTR_NAME_SD, sd_ndr.data, | |
1504 | sd_ndr.offset, 0); | |
1505 | if (rc < 0) | |
1506 | ksmbd_err("Failed to store XATTR ntacl :%d\n", rc); | |
1507 | ||
1508 | kfree(sd_ndr.data); | |
1509 | out: | |
1510 | kfree(acl_ndr.data); | |
1511 | kfree(smb_acl); | |
1512 | kfree(def_smb_acl); | |
1513 | return rc; | |
1514 | } | |
1515 | ||
1516 | int ksmbd_vfs_get_sd_xattr(struct ksmbd_conn *conn, struct dentry *dentry, | |
1517 | struct smb_ntsd **pntsd) | |
1518 | { | |
1519 | int rc; | |
1520 | struct ndr n; | |
1521 | ||
1522 | rc = ksmbd_vfs_getxattr(dentry, XATTR_NAME_SD, &n.data); | |
1523 | if (rc > 0) { | |
1524 | struct inode *inode = dentry->d_inode; | |
1525 | struct ndr acl_ndr = {0}; | |
1526 | struct xattr_ntacl acl; | |
1527 | struct xattr_smb_acl *smb_acl = NULL, *def_smb_acl = NULL; | |
1528 | __u8 cmp_hash[XATTR_SD_HASH_SIZE] = {0}; | |
1529 | ||
1530 | n.length = rc; | |
1531 | rc = ndr_decode_v4_ntacl(&n, &acl); | |
1532 | if (rc) | |
1533 | return rc; | |
1534 | ||
1535 | smb_acl = ksmbd_vfs_make_xattr_posix_acl(inode, | |
1536 | ACL_TYPE_ACCESS); | |
1537 | if (S_ISDIR(inode->i_mode)) | |
1538 | def_smb_acl = ksmbd_vfs_make_xattr_posix_acl(inode, | |
1539 | ACL_TYPE_DEFAULT); | |
1540 | ||
1541 | rc = ndr_encode_posix_acl(&acl_ndr, inode, smb_acl, def_smb_acl); | |
1542 | if (rc) { | |
1543 | ksmbd_err("failed to encode ndr to posix acl\n"); | |
1544 | goto out; | |
1545 | } | |
1546 | ||
1547 | rc = ksmbd_gen_sd_hash(conn, acl_ndr.data, acl_ndr.offset, | |
1548 | cmp_hash); | |
1549 | if (rc) { | |
1550 | ksmbd_err("failed to generate hash for ndr acl\n"); | |
1551 | goto out; | |
1552 | } | |
1553 | ||
1554 | if (memcmp(cmp_hash, acl.posix_acl_hash, XATTR_SD_HASH_SIZE)) { | |
1555 | ksmbd_err("hash value diff\n"); | |
1556 | rc = -EINVAL; | |
1557 | goto out; | |
1558 | } | |
1559 | ||
1560 | *pntsd = acl.sd_buf; | |
1561 | (*pntsd)->osidoffset = | |
1562 | cpu_to_le32(le32_to_cpu((*pntsd)->osidoffset) - NDR_NTSD_OFFSETOF); | |
1563 | (*pntsd)->gsidoffset = | |
1564 | cpu_to_le32(le32_to_cpu((*pntsd)->gsidoffset) - NDR_NTSD_OFFSETOF); | |
1565 | (*pntsd)->dacloffset = | |
1566 | cpu_to_le32(le32_to_cpu((*pntsd)->dacloffset) - NDR_NTSD_OFFSETOF); | |
1567 | ||
1568 | rc = acl.sd_size; | |
1569 | out: | |
1570 | kfree(n.data); | |
1571 | kfree(acl_ndr.data); | |
1572 | kfree(smb_acl); | |
1573 | kfree(def_smb_acl); | |
1574 | } | |
1575 | ||
1576 | return rc; | |
1577 | } | |
1578 | ||
1579 | int ksmbd_vfs_set_dos_attrib_xattr(struct dentry *dentry, | |
1580 | struct xattr_dos_attrib *da) | |
1581 | { | |
1582 | struct ndr n; | |
1583 | int err; | |
1584 | ||
1585 | err = ndr_encode_dos_attr(&n, da); | |
1586 | if (err) | |
1587 | return err; | |
1588 | ||
1589 | err = ksmbd_vfs_setxattr(dentry, | |
1590 | XATTR_NAME_DOS_ATTRIBUTE, | |
1591 | (void *)n.data, | |
1592 | n.offset, | |
1593 | 0); | |
1594 | if (err) | |
1595 | ksmbd_debug(SMB, "failed to store dos attribute in xattr\n"); | |
1596 | kfree(n.data); | |
1597 | ||
1598 | return err; | |
1599 | } | |
1600 | ||
1601 | int ksmbd_vfs_get_dos_attrib_xattr(struct dentry *dentry, | |
1602 | struct xattr_dos_attrib *da) | |
1603 | { | |
1604 | struct ndr n; | |
1605 | int err; | |
1606 | ||
1607 | err = ksmbd_vfs_getxattr(dentry, | |
1608 | XATTR_NAME_DOS_ATTRIBUTE, | |
1609 | (char **)&n.data); | |
1610 | if (err > 0) { | |
1611 | n.length = err; | |
1612 | if (ndr_decode_dos_attr(&n, da)) | |
1613 | err = -EINVAL; | |
1614 | ksmbd_free(n.data); | |
1615 | } else | |
1616 | ksmbd_debug(SMB, "failed to load dos attribute in xattr\n"); | |
1617 | ||
1618 | return err; | |
1619 | } | |
1620 | ||
1621 | struct posix_acl *ksmbd_vfs_posix_acl_alloc(int count, gfp_t flags) | |
1622 | { | |
1623 | #if IS_ENABLED(CONFIG_FS_POSIX_ACL) | |
1624 | return posix_acl_alloc(count, flags); | |
1625 | #else | |
1626 | return NULL; | |
1627 | #endif | |
1628 | } | |
1629 | ||
1630 | struct posix_acl *ksmbd_vfs_get_acl(struct inode *inode, int type) | |
1631 | { | |
1632 | #if IS_ENABLED(CONFIG_FS_POSIX_ACL) | |
1633 | return get_acl(inode, type); | |
1634 | #else | |
1635 | return NULL; | |
1636 | #endif | |
1637 | } | |
1638 | ||
1639 | int ksmbd_vfs_set_posix_acl(struct inode *inode, int type, | |
1640 | struct posix_acl *acl) | |
1641 | { | |
1642 | #if IS_ENABLED(CONFIG_FS_POSIX_ACL) | |
1643 | return set_posix_acl(&init_user_ns, inode, type, acl); | |
1644 | #else | |
1645 | return -EOPNOTSUPP; | |
1646 | #endif | |
1647 | } | |
1648 | ||
1649 | /** | |
1650 | * ksmbd_vfs_init_kstat() - convert unix stat information to smb stat format | |
1651 | * @p: destination buffer | |
1652 | * @ksmbd_kstat: ksmbd kstat wrapper | |
1653 | */ | |
1654 | void *ksmbd_vfs_init_kstat(char **p, struct ksmbd_kstat *ksmbd_kstat) | |
1655 | { | |
1656 | struct file_directory_info *info = (struct file_directory_info *)(*p); | |
1657 | struct kstat *kstat = ksmbd_kstat->kstat; | |
1658 | u64 time; | |
1659 | ||
1660 | info->FileIndex = 0; | |
1661 | info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time); | |
1662 | time = ksmbd_UnixTimeToNT(kstat->atime); | |
1663 | info->LastAccessTime = cpu_to_le64(time); | |
1664 | time = ksmbd_UnixTimeToNT(kstat->mtime); | |
1665 | info->LastWriteTime = cpu_to_le64(time); | |
1666 | time = ksmbd_UnixTimeToNT(kstat->ctime); | |
1667 | info->ChangeTime = cpu_to_le64(time); | |
1668 | ||
1669 | if (ksmbd_kstat->file_attributes & ATTR_DIRECTORY_LE) { | |
1670 | info->EndOfFile = 0; | |
1671 | info->AllocationSize = 0; | |
1672 | } else { | |
1673 | info->EndOfFile = cpu_to_le64(kstat->size); | |
1674 | info->AllocationSize = cpu_to_le64(kstat->blocks << 9); | |
1675 | } | |
1676 | info->ExtFileAttributes = ksmbd_kstat->file_attributes; | |
1677 | ||
1678 | return info; | |
1679 | } | |
1680 | ||
1681 | int ksmbd_vfs_fill_dentry_attrs(struct ksmbd_work *work, | |
1682 | struct dentry *dentry, | |
1683 | struct ksmbd_kstat *ksmbd_kstat) | |
1684 | { | |
1685 | u64 time; | |
1686 | int rc; | |
1687 | ||
1688 | generic_fillattr(&init_user_ns, d_inode(dentry), ksmbd_kstat->kstat); | |
1689 | ||
1690 | time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime); | |
1691 | ksmbd_kstat->create_time = time; | |
1692 | ||
1693 | /* | |
1694 | * set default value for the case that store dos attributes is not yes | |
1695 | * or that acl is disable in server's filesystem and the config is yes. | |
1696 | */ | |
1697 | if (S_ISDIR(ksmbd_kstat->kstat->mode)) | |
1698 | ksmbd_kstat->file_attributes = ATTR_DIRECTORY_LE; | |
1699 | else | |
1700 | ksmbd_kstat->file_attributes = ATTR_ARCHIVE_LE; | |
1701 | ||
1702 | if (test_share_config_flag(work->tcon->share_conf, | |
1703 | KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) { | |
1704 | struct xattr_dos_attrib da; | |
1705 | ||
1706 | rc = ksmbd_vfs_get_dos_attrib_xattr(dentry, &da); | |
1707 | if (rc > 0) { | |
1708 | ksmbd_kstat->file_attributes = cpu_to_le32(da.attr); | |
1709 | ksmbd_kstat->create_time = da.create_time; | |
1710 | } else | |
1711 | ksmbd_debug(VFS, "fail to load dos attribute.\n"); | |
1712 | } | |
1713 | ||
1714 | return 0; | |
1715 | } | |
1716 | ||
1717 | ssize_t ksmbd_vfs_casexattr_len(struct dentry *dentry, | |
1718 | char *attr_name, | |
1719 | int attr_name_len) | |
1720 | { | |
1721 | char *name, *xattr_list = NULL; | |
1722 | ssize_t value_len = -ENOENT, xattr_list_len; | |
1723 | ||
1724 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
1725 | if (xattr_list_len <= 0) | |
1726 | goto out; | |
1727 | ||
1728 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
1729 | name += strlen(name) + 1) { | |
1730 | ksmbd_debug(VFS, "%s, len %zd\n", name, strlen(name)); | |
1731 | if (strncasecmp(attr_name, name, attr_name_len)) | |
1732 | continue; | |
1733 | ||
1734 | value_len = ksmbd_vfs_xattr_len(dentry, name); | |
1735 | break; | |
1736 | } | |
1737 | ||
1738 | out: | |
1739 | ksmbd_vfs_xattr_free(xattr_list); | |
1740 | return value_len; | |
1741 | } | |
1742 | ||
1743 | int ksmbd_vfs_xattr_stream_name(char *stream_name, | |
1744 | char **xattr_stream_name, | |
1745 | size_t *xattr_stream_name_size, | |
1746 | int s_type) | |
1747 | { | |
1748 | int stream_name_size; | |
1749 | char *xattr_stream_name_buf; | |
1750 | char *type; | |
1751 | int type_len; | |
1752 | ||
1753 | if (s_type == DIR_STREAM) | |
1754 | type = ":$INDEX_ALLOCATION"; | |
1755 | else | |
1756 | type = ":$DATA"; | |
1757 | ||
1758 | type_len = strlen(type); | |
1759 | stream_name_size = strlen(stream_name); | |
1760 | *xattr_stream_name_size = stream_name_size + XATTR_NAME_STREAM_LEN + 1; | |
1761 | xattr_stream_name_buf = kmalloc(*xattr_stream_name_size + type_len, | |
1762 | GFP_KERNEL); | |
1763 | if (!xattr_stream_name_buf) | |
1764 | return -ENOMEM; | |
1765 | ||
1766 | memcpy(xattr_stream_name_buf, | |
1767 | XATTR_NAME_STREAM, | |
1768 | XATTR_NAME_STREAM_LEN); | |
1769 | ||
1770 | if (stream_name_size) { | |
1771 | memcpy(&xattr_stream_name_buf[XATTR_NAME_STREAM_LEN], | |
1772 | stream_name, | |
1773 | stream_name_size); | |
1774 | } | |
1775 | memcpy(&xattr_stream_name_buf[*xattr_stream_name_size - 1], type, type_len); | |
1776 | *xattr_stream_name_size += type_len; | |
1777 | ||
1778 | xattr_stream_name_buf[*xattr_stream_name_size - 1] = '\0'; | |
1779 | *xattr_stream_name = xattr_stream_name_buf; | |
1780 | ||
1781 | return 0; | |
1782 | } | |
1783 | ||
1784 | static int ksmbd_vfs_copy_file_range(struct file *file_in, loff_t pos_in, | |
1785 | struct file *file_out, loff_t pos_out, | |
1786 | size_t len) | |
1787 | { | |
1788 | struct inode *inode_in = file_inode(file_in); | |
1789 | struct inode *inode_out = file_inode(file_out); | |
1790 | int ret; | |
1791 | ||
1792 | ret = vfs_copy_file_range(file_in, pos_in, file_out, pos_out, len, 0); | |
1793 | /* do splice for the copy between different file systems */ | |
1794 | if (ret != -EXDEV) | |
1795 | return ret; | |
1796 | ||
1797 | if (S_ISDIR(inode_in->i_mode) || S_ISDIR(inode_out->i_mode)) | |
1798 | return -EISDIR; | |
1799 | if (!S_ISREG(inode_in->i_mode) || !S_ISREG(inode_out->i_mode)) | |
1800 | return -EINVAL; | |
1801 | ||
1802 | if (!(file_in->f_mode & FMODE_READ) || | |
1803 | !(file_out->f_mode & FMODE_WRITE)) | |
1804 | return -EBADF; | |
1805 | ||
1806 | if (len == 0) | |
1807 | return 0; | |
1808 | ||
1809 | file_start_write(file_out); | |
1810 | ||
1811 | /* | |
1812 | * skip the verification of the range of data. it will be done | |
1813 | * in do_splice_direct | |
1814 | */ | |
1815 | ret = do_splice_direct(file_in, &pos_in, file_out, &pos_out, | |
1816 | len > MAX_RW_COUNT ? MAX_RW_COUNT : len, 0); | |
1817 | if (ret > 0) { | |
1818 | fsnotify_access(file_in); | |
1819 | add_rchar(current, ret); | |
1820 | fsnotify_modify(file_out); | |
1821 | add_wchar(current, ret); | |
1822 | } | |
1823 | ||
1824 | inc_syscr(current); | |
1825 | inc_syscw(current); | |
1826 | ||
1827 | file_end_write(file_out); | |
1828 | return ret; | |
1829 | } | |
1830 | ||
1831 | int ksmbd_vfs_copy_file_ranges(struct ksmbd_work *work, | |
1832 | struct ksmbd_file *src_fp, | |
1833 | struct ksmbd_file *dst_fp, | |
1834 | struct srv_copychunk *chunks, | |
1835 | unsigned int chunk_count, | |
1836 | unsigned int *chunk_count_written, | |
1837 | unsigned int *chunk_size_written, | |
1838 | loff_t *total_size_written) | |
1839 | { | |
1840 | unsigned int i; | |
1841 | loff_t src_off, dst_off, src_file_size; | |
1842 | size_t len; | |
1843 | int ret; | |
1844 | ||
1845 | *chunk_count_written = 0; | |
1846 | *chunk_size_written = 0; | |
1847 | *total_size_written = 0; | |
1848 | ||
1849 | if (!(src_fp->daccess & (FILE_READ_DATA_LE | FILE_EXECUTE_LE))) { | |
1850 | ksmbd_err("no right to read(%s)\n", FP_FILENAME(src_fp)); | |
1851 | return -EACCES; | |
1852 | } | |
1853 | if (!(dst_fp->daccess & (FILE_WRITE_DATA_LE | FILE_APPEND_DATA_LE))) { | |
1854 | ksmbd_err("no right to write(%s)\n", FP_FILENAME(dst_fp)); | |
1855 | return -EACCES; | |
1856 | } | |
1857 | ||
1858 | if (ksmbd_stream_fd(src_fp) || ksmbd_stream_fd(dst_fp)) | |
1859 | return -EBADF; | |
1860 | ||
1861 | smb_break_all_levII_oplock(work, dst_fp, 1); | |
1862 | ||
1863 | for (i = 0; i < chunk_count; i++) { | |
1864 | src_off = le64_to_cpu(chunks[i].SourceOffset); | |
1865 | dst_off = le64_to_cpu(chunks[i].TargetOffset); | |
1866 | len = le32_to_cpu(chunks[i].Length); | |
1867 | ||
1868 | if (check_lock_range(src_fp->filp, src_off, | |
1869 | src_off + len - 1, READ)) | |
1870 | return -EAGAIN; | |
1871 | if (check_lock_range(dst_fp->filp, dst_off, | |
1872 | dst_off + len - 1, WRITE)) | |
1873 | return -EAGAIN; | |
1874 | } | |
1875 | ||
1876 | src_file_size = i_size_read(file_inode(src_fp->filp)); | |
1877 | ||
1878 | for (i = 0; i < chunk_count; i++) { | |
1879 | src_off = le64_to_cpu(chunks[i].SourceOffset); | |
1880 | dst_off = le64_to_cpu(chunks[i].TargetOffset); | |
1881 | len = le32_to_cpu(chunks[i].Length); | |
1882 | ||
1883 | if (src_off + len > src_file_size) | |
1884 | return -E2BIG; | |
1885 | ||
1886 | ret = ksmbd_vfs_copy_file_range(src_fp->filp, src_off, | |
1887 | dst_fp->filp, dst_off, len); | |
1888 | if (ret < 0) | |
1889 | return ret; | |
1890 | ||
1891 | *chunk_count_written += 1; | |
1892 | *total_size_written += ret; | |
1893 | } | |
1894 | return 0; | |
1895 | } | |
1896 | ||
1897 | int ksmbd_vfs_posix_lock_wait(struct file_lock *flock) | |
1898 | { | |
1899 | return wait_event_interruptible(flock->fl_wait, !flock->fl_blocker); | |
1900 | } | |
1901 | ||
1902 | int ksmbd_vfs_posix_lock_wait_timeout(struct file_lock *flock, long timeout) | |
1903 | { | |
1904 | return wait_event_interruptible_timeout(flock->fl_wait, | |
1905 | !flock->fl_blocker, | |
1906 | timeout); | |
1907 | } | |
1908 | ||
1909 | void ksmbd_vfs_posix_lock_unblock(struct file_lock *flock) | |
1910 | { | |
1911 | locks_delete_block(flock); | |
1912 | } | |
1913 | ||
1914 | int ksmbd_vfs_set_init_posix_acl(struct inode *inode) | |
1915 | { | |
1916 | struct posix_acl_state acl_state; | |
1917 | struct posix_acl *acls; | |
1918 | int rc; | |
1919 | ||
1920 | ksmbd_debug(SMB, "Set posix acls\n"); | |
1921 | rc = init_acl_state(&acl_state, 1); | |
1922 | if (rc) | |
1923 | return rc; | |
1924 | ||
1925 | /* Set default owner group */ | |
1926 | acl_state.owner.allow = (inode->i_mode & 0700) >> 6; | |
1927 | acl_state.group.allow = (inode->i_mode & 0070) >> 3; | |
1928 | acl_state.other.allow = inode->i_mode & 0007; | |
1929 | acl_state.users->aces[acl_state.users->n].uid = inode->i_uid; | |
1930 | acl_state.users->aces[acl_state.users->n++].perms.allow = | |
1931 | acl_state.owner.allow; | |
1932 | acl_state.groups->aces[acl_state.groups->n].gid = inode->i_gid; | |
1933 | acl_state.groups->aces[acl_state.groups->n++].perms.allow = | |
1934 | acl_state.group.allow; | |
1935 | acl_state.mask.allow = 0x07; | |
1936 | ||
1937 | acls = ksmbd_vfs_posix_acl_alloc(6, GFP_KERNEL); | |
1938 | if (!acls) { | |
1939 | free_acl_state(&acl_state); | |
1940 | return -ENOMEM; | |
1941 | } | |
1942 | posix_state_to_acl(&acl_state, acls->a_entries); | |
1943 | rc = ksmbd_vfs_set_posix_acl(inode, ACL_TYPE_ACCESS, acls); | |
1944 | if (rc < 0) | |
1945 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_ACCESS) failed, rc : %d\n", | |
1946 | rc); | |
1947 | else if (S_ISDIR(inode->i_mode)) { | |
1948 | posix_state_to_acl(&acl_state, acls->a_entries); | |
1949 | rc = ksmbd_vfs_set_posix_acl(inode, ACL_TYPE_DEFAULT, acls); | |
1950 | if (rc < 0) | |
1951 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_DEFAULT) failed, rc : %d\n", | |
1952 | rc); | |
1953 | } | |
1954 | free_acl_state(&acl_state); | |
1955 | posix_acl_release(acls); | |
1956 | return rc; | |
1957 | } | |
1958 | ||
1959 | int ksmbd_vfs_inherit_posix_acl(struct inode *inode, struct inode *parent_inode) | |
1960 | { | |
1961 | struct posix_acl *acls; | |
1962 | struct posix_acl_entry *pace; | |
1963 | int rc, i; | |
1964 | ||
1965 | acls = ksmbd_vfs_get_acl(parent_inode, ACL_TYPE_DEFAULT); | |
1966 | if (!acls) | |
1967 | return -ENOENT; | |
1968 | pace = acls->a_entries; | |
1969 | ||
1970 | for (i = 0; i < acls->a_count; i++, pace++) { | |
1971 | if (pace->e_tag == ACL_MASK) { | |
1972 | pace->e_perm = 0x07; | |
1973 | break; | |
1974 | } | |
1975 | } | |
1976 | ||
1977 | rc = ksmbd_vfs_set_posix_acl(inode, ACL_TYPE_ACCESS, acls); | |
1978 | if (rc < 0) | |
1979 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_ACCESS) failed, rc : %d\n", | |
1980 | rc); | |
1981 | if (S_ISDIR(inode->i_mode)) { | |
1982 | rc = ksmbd_vfs_set_posix_acl(inode, ACL_TYPE_DEFAULT, acls); | |
1983 | if (rc < 0) | |
1984 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_DEFAULT) failed, rc : %d\n", | |
1985 | rc); | |
1986 | } | |
1987 | posix_acl_release(acls); | |
1988 | return rc; | |
1989 | } |