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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> | |
f4415848 NJ |
15 | #include <linux/fsnotify.h> |
16 | #include <linux/dcache.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/vmalloc.h> | |
19 | #include <linux/sched/xacct.h> | |
20 | #include <linux/crc32c.h> | |
21 | ||
22 | #include "glob.h" | |
23 | #include "oplock.h" | |
24 | #include "connection.h" | |
f4415848 NJ |
25 | #include "vfs.h" |
26 | #include "vfs_cache.h" | |
27 | #include "smbacl.h" | |
28 | #include "ndr.h" | |
29 | #include "auth.h" | |
5626518e | 30 | #include "misc.h" |
f4415848 | 31 | |
f4415848 NJ |
32 | #include "smb_common.h" |
33 | #include "mgmt/share_config.h" | |
34 | #include "mgmt/tree_connect.h" | |
35 | #include "mgmt/user_session.h" | |
36 | #include "mgmt/user_config.h" | |
37 | ||
38 | static char *extract_last_component(char *path) | |
39 | { | |
40 | char *p = strrchr(path, '/'); | |
41 | ||
42 | if (p && p[1] != '\0') { | |
43 | *p = '\0'; | |
44 | p++; | |
45 | } else { | |
46 | p = NULL; | |
bde1694a | 47 | pr_err("Invalid path %s\n", path); |
f4415848 NJ |
48 | } |
49 | return p; | |
50 | } | |
51 | ||
f4415848 | 52 | static void ksmbd_vfs_inherit_owner(struct ksmbd_work *work, |
070fb21e NJ |
53 | struct inode *parent_inode, |
54 | struct inode *inode) | |
f4415848 NJ |
55 | { |
56 | if (!test_share_config_flag(work->tcon->share_conf, | |
64b39f4a | 57 | KSMBD_SHARE_FLAG_INHERIT_OWNER)) |
f4415848 NJ |
58 | return; |
59 | ||
60 | i_uid_write(inode, i_uid_read(parent_inode)); | |
61 | } | |
62 | ||
333111a6 HL |
63 | /** |
64 | * ksmbd_vfs_lock_parent() - lock parent dentry if it is stable | |
65 | * | |
66 | * the parent dentry got by dget_parent or @parent could be | |
67 | * unstable, we try to lock a parent inode and lookup the | |
68 | * child dentry again. | |
69 | * | |
70 | * the reference count of @parent isn't incremented. | |
71 | */ | |
12202c05 | 72 | int ksmbd_vfs_lock_parent(struct dentry *parent, struct dentry *child) |
333111a6 HL |
73 | { |
74 | struct dentry *dentry; | |
75 | int ret = 0; | |
76 | ||
77 | inode_lock_nested(d_inode(parent), I_MUTEX_PARENT); | |
78 | dentry = lookup_one_len(child->d_name.name, parent, | |
79 | child->d_name.len); | |
80 | if (IS_ERR(dentry)) { | |
81 | ret = PTR_ERR(dentry); | |
82 | goto out_err; | |
83 | } | |
84 | ||
85 | if (dentry != child) { | |
86 | ret = -ESTALE; | |
87 | dput(dentry); | |
88 | goto out_err; | |
89 | } | |
90 | ||
91 | dput(dentry); | |
92 | return 0; | |
93 | out_err: | |
94 | inode_unlock(d_inode(parent)); | |
95 | return ret; | |
96 | } | |
97 | ||
af34983e HL |
98 | int ksmbd_vfs_may_delete(struct user_namespace *user_ns, |
99 | struct dentry *dentry) | |
f4415848 | 100 | { |
6c5e36d1 HL |
101 | struct dentry *parent; |
102 | int ret; | |
333111a6 | 103 | |
6c5e36d1 HL |
104 | parent = dget_parent(dentry); |
105 | ret = ksmbd_vfs_lock_parent(parent, dentry); | |
106 | if (ret) { | |
f4415848 | 107 | dput(parent); |
6c5e36d1 | 108 | return ret; |
f4415848 | 109 | } |
6c5e36d1 | 110 | |
af34983e | 111 | ret = inode_permission(user_ns, d_inode(parent), |
6c5e36d1 HL |
112 | MAY_EXEC | MAY_WRITE); |
113 | ||
114 | inode_unlock(d_inode(parent)); | |
115 | dput(parent); | |
ff1d5727 | 116 | return ret; |
f4415848 NJ |
117 | } |
118 | ||
af34983e HL |
119 | int ksmbd_vfs_query_maximal_access(struct user_namespace *user_ns, |
120 | struct dentry *dentry, __le32 *daccess) | |
f4415848 | 121 | { |
333111a6 | 122 | struct dentry *parent; |
ff1d5727 | 123 | int ret = 0; |
f4415848 NJ |
124 | |
125 | *daccess = cpu_to_le32(FILE_READ_ATTRIBUTES | READ_CONTROL); | |
126 | ||
af34983e | 127 | if (!inode_permission(user_ns, d_inode(dentry), MAY_OPEN | MAY_WRITE)) |
f4415848 NJ |
128 | *daccess |= cpu_to_le32(WRITE_DAC | WRITE_OWNER | SYNCHRONIZE | |
129 | FILE_WRITE_DATA | FILE_APPEND_DATA | | |
130 | FILE_WRITE_EA | FILE_WRITE_ATTRIBUTES | | |
131 | FILE_DELETE_CHILD); | |
132 | ||
af34983e | 133 | if (!inode_permission(user_ns, d_inode(dentry), MAY_OPEN | MAY_READ)) |
f4415848 NJ |
134 | *daccess |= FILE_READ_DATA_LE | FILE_READ_EA_LE; |
135 | ||
af34983e | 136 | if (!inode_permission(user_ns, d_inode(dentry), MAY_OPEN | MAY_EXEC)) |
f4415848 NJ |
137 | *daccess |= FILE_EXECUTE_LE; |
138 | ||
139 | parent = dget_parent(dentry); | |
333111a6 HL |
140 | ret = ksmbd_vfs_lock_parent(parent, dentry); |
141 | if (ret) { | |
142 | dput(parent); | |
143 | return ret; | |
ff1d5727 | 144 | } |
f4415848 | 145 | |
af34983e | 146 | if (!inode_permission(user_ns, d_inode(parent), MAY_EXEC | MAY_WRITE)) |
f4415848 | 147 | *daccess |= FILE_DELETE_LE; |
ff1d5727 | 148 | |
ff1d5727 | 149 | inode_unlock(d_inode(parent)); |
f4415848 | 150 | dput(parent); |
ff1d5727 | 151 | return ret; |
f4415848 NJ |
152 | } |
153 | ||
f4415848 NJ |
154 | /** |
155 | * ksmbd_vfs_create() - vfs helper for smb create file | |
156 | * @work: work | |
157 | * @name: file name | |
158 | * @mode: file create mode | |
159 | * | |
160 | * Return: 0 on success, otherwise error | |
161 | */ | |
64b39f4a | 162 | int ksmbd_vfs_create(struct ksmbd_work *work, const char *name, umode_t mode) |
f4415848 NJ |
163 | { |
164 | struct path path; | |
165 | struct dentry *dentry; | |
166 | int err; | |
167 | ||
168 | dentry = kern_path_create(AT_FDCWD, name, &path, 0); | |
169 | if (IS_ERR(dentry)) { | |
170 | err = PTR_ERR(dentry); | |
171 | if (err != -ENOENT) | |
bde1694a NJ |
172 | pr_err("path create failed for %s, err %d\n", |
173 | name, err); | |
f4415848 NJ |
174 | return err; |
175 | } | |
176 | ||
177 | mode |= S_IFREG; | |
af34983e HL |
178 | err = vfs_create(mnt_user_ns(path.mnt), d_inode(path.dentry), |
179 | dentry, mode, true); | |
f4415848 NJ |
180 | if (!err) { |
181 | ksmbd_vfs_inherit_owner(work, d_inode(path.dentry), | |
070fb21e | 182 | d_inode(dentry)); |
f4415848 | 183 | } else { |
bde1694a | 184 | pr_err("File(%s): creation failed (err:%d)\n", name, err); |
f4415848 NJ |
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", | |
070fb21e | 209 | name, err); |
f4415848 NJ |
210 | return err; |
211 | } | |
212 | ||
213 | mode |= S_IFDIR; | |
af34983e HL |
214 | err = vfs_mkdir(mnt_user_ns(path.mnt), d_inode(path.dentry), |
215 | dentry, mode); | |
a2d6321b | 216 | if (err) { |
16370235 | 217 | goto out; |
a2d6321b | 218 | } else if (d_unhashed(dentry)) { |
16370235 HL |
219 | struct dentry *d; |
220 | ||
070fb21e NJ |
221 | d = lookup_one_len(dentry->d_name.name, dentry->d_parent, |
222 | dentry->d_name.len); | |
16370235 HL |
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 | ||
070fb21e | 233 | ksmbd_vfs_inherit_owner(work, d_inode(path.dentry), d_inode(d)); |
16370235 | 234 | dput(d); |
64b39f4a | 235 | } |
16370235 | 236 | out: |
f4415848 | 237 | done_path_create(&path, dentry); |
16370235 | 238 | if (err) |
bde1694a | 239 | pr_err("mkdir(%s): creation failed (err:%d)\n", name, err); |
f4415848 NJ |
240 | return err; |
241 | } | |
242 | ||
af34983e HL |
243 | static ssize_t ksmbd_vfs_getcasexattr(struct user_namespace *user_ns, |
244 | struct dentry *dentry, char *attr_name, | |
070fb21e | 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 | ||
af34983e HL |
260 | value_len = ksmbd_vfs_getxattr(user_ns, |
261 | dentry, | |
f4415848 NJ |
262 | name, |
263 | attr_value); | |
264 | if (value_len < 0) | |
bde1694a | 265 | pr_err("failed to get xattr in file\n"); |
f4415848 NJ |
266 | break; |
267 | } | |
268 | ||
269 | out: | |
79f6b11a | 270 | kvfree(xattr_list); |
f4415848 NJ |
271 | return value_len; |
272 | } | |
273 | ||
274 | static int ksmbd_vfs_stream_read(struct ksmbd_file *fp, char *buf, loff_t *pos, | |
070fb21e | 275 | size_t count) |
f4415848 NJ |
276 | { |
277 | ssize_t v_len; | |
278 | char *stream_buf = NULL; | |
f4415848 NJ |
279 | |
280 | ksmbd_debug(VFS, "read stream data pos : %llu, count : %zd\n", | |
070fb21e | 281 | *pos, count); |
f4415848 | 282 | |
af34983e HL |
283 | v_len = ksmbd_vfs_getcasexattr(file_mnt_user_ns(fp->filp), |
284 | fp->filp->f_path.dentry, | |
f4415848 NJ |
285 | fp->stream.name, |
286 | fp->stream.size, | |
287 | &stream_buf); | |
fd6de099 YY |
288 | if ((int)v_len <= 0) |
289 | return (int)v_len; | |
f4415848 | 290 | |
2ae1a6cc NJ |
291 | if (v_len <= *pos) { |
292 | count = -EINVAL; | |
293 | goto free_buf; | |
294 | } | |
295 | ||
296 | if (v_len - *pos < count) | |
297 | count = v_len - *pos; | |
298 | ||
f4415848 | 299 | memcpy(buf, &stream_buf[*pos], count); |
2ae1a6cc NJ |
300 | |
301 | free_buf: | |
673b9ba7 | 302 | kvfree(stream_buf); |
2ae1a6cc | 303 | return count; |
f4415848 NJ |
304 | } |
305 | ||
306 | /** | |
307 | * check_lock_range() - vfs helper for smb byte range file locking | |
308 | * @filp: the file to apply the lock to | |
309 | * @start: lock start byte offset | |
310 | * @end: lock end byte offset | |
311 | * @type: byte range type read/write | |
312 | * | |
313 | * Return: 0 on success, otherwise error | |
314 | */ | |
64b39f4a | 315 | static int check_lock_range(struct file *filp, loff_t start, loff_t end, |
070fb21e | 316 | unsigned char type) |
f4415848 NJ |
317 | { |
318 | struct file_lock *flock; | |
319 | struct file_lock_context *ctx = file_inode(filp)->i_flctx; | |
320 | int error = 0; | |
321 | ||
322 | if (!ctx || list_empty_careful(&ctx->flc_posix)) | |
323 | return 0; | |
324 | ||
325 | spin_lock(&ctx->flc_lock); | |
326 | list_for_each_entry(flock, &ctx->flc_posix, fl_list) { | |
327 | /* check conflict locks */ | |
328 | if (flock->fl_end >= start && end >= flock->fl_start) { | |
329 | if (flock->fl_type == F_RDLCK) { | |
330 | if (type == WRITE) { | |
bde1694a | 331 | pr_err("not allow write by shared lock\n"); |
f4415848 NJ |
332 | error = 1; |
333 | goto out; | |
334 | } | |
335 | } else if (flock->fl_type == F_WRLCK) { | |
336 | /* check owner in lock */ | |
337 | if (flock->fl_file != filp) { | |
338 | error = 1; | |
bde1694a | 339 | pr_err("not allow rw access by exclusive lock from other opens\n"); |
f4415848 NJ |
340 | goto out; |
341 | } | |
342 | } | |
343 | } | |
344 | } | |
345 | out: | |
346 | spin_unlock(&ctx->flc_lock); | |
347 | return error; | |
348 | } | |
349 | ||
350 | /** | |
351 | * ksmbd_vfs_read() - vfs helper for smb file read | |
352 | * @work: smb work | |
353 | * @fid: file id of open file | |
354 | * @count: read byte count | |
355 | * @pos: file pos | |
356 | * | |
357 | * Return: number of read bytes on success, otherwise error | |
358 | */ | |
64b39f4a | 359 | int ksmbd_vfs_read(struct ksmbd_work *work, struct ksmbd_file *fp, size_t count, |
070fb21e | 360 | loff_t *pos) |
f4415848 | 361 | { |
afa8f016 | 362 | struct file *filp = fp->filp; |
f4415848 | 363 | ssize_t nbytes = 0; |
afa8f016 NJ |
364 | char *rbuf = work->aux_payload_buf; |
365 | struct inode *inode = file_inode(filp); | |
f4415848 | 366 | |
f4415848 NJ |
367 | if (S_ISDIR(inode->i_mode)) |
368 | return -EISDIR; | |
369 | ||
370 | if (unlikely(count == 0)) | |
371 | return 0; | |
372 | ||
373 | if (work->conn->connection_type) { | |
374 | if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_EXECUTE_LE))) { | |
493fa2fb NJ |
375 | pr_err("no right to read(%pd)\n", |
376 | fp->filp->f_path.dentry); | |
f4415848 NJ |
377 | return -EACCES; |
378 | } | |
379 | } | |
380 | ||
381 | if (ksmbd_stream_fd(fp)) | |
382 | return ksmbd_vfs_stream_read(fp, rbuf, pos, count); | |
383 | ||
c36fca86 NJ |
384 | if (!work->tcon->posix_extensions) { |
385 | int ret; | |
386 | ||
070fb21e | 387 | ret = check_lock_range(filp, *pos, *pos + count - 1, READ); |
c36fca86 | 388 | if (ret) { |
bde1694a | 389 | pr_err("unable to read due to lock\n"); |
c36fca86 NJ |
390 | return -EAGAIN; |
391 | } | |
f4415848 NJ |
392 | } |
393 | ||
394 | nbytes = kernel_read(filp, rbuf, count, pos); | |
395 | if (nbytes < 0) { | |
bde1694a NJ |
396 | pr_err("smb read failed for (%s), err = %zd\n", |
397 | fp->filename, nbytes); | |
f4415848 NJ |
398 | return nbytes; |
399 | } | |
400 | ||
401 | filp->f_pos = *pos; | |
402 | return nbytes; | |
403 | } | |
404 | ||
405 | static int ksmbd_vfs_stream_write(struct ksmbd_file *fp, char *buf, loff_t *pos, | |
070fb21e | 406 | size_t count) |
f4415848 NJ |
407 | { |
408 | char *stream_buf = NULL, *wbuf; | |
465d7204 | 409 | struct user_namespace *user_ns = file_mnt_user_ns(fp->filp); |
f4415848 NJ |
410 | size_t size, v_len; |
411 | int err = 0; | |
412 | ||
413 | ksmbd_debug(VFS, "write stream data pos : %llu, count : %zd\n", | |
070fb21e | 414 | *pos, count); |
f4415848 NJ |
415 | |
416 | size = *pos + count; | |
417 | if (size > XATTR_SIZE_MAX) { | |
418 | size = XATTR_SIZE_MAX; | |
419 | count = (*pos + count) - XATTR_SIZE_MAX; | |
420 | } | |
421 | ||
465d7204 | 422 | v_len = ksmbd_vfs_getcasexattr(user_ns, |
af34983e | 423 | fp->filp->f_path.dentry, |
f4415848 NJ |
424 | fp->stream.name, |
425 | fp->stream.size, | |
426 | &stream_buf); | |
fd6de099 | 427 | if ((int)v_len < 0) { |
bde1694a | 428 | pr_err("not found stream in xattr : %zd\n", v_len); |
fd6de099 | 429 | err = (int)v_len; |
f4415848 NJ |
430 | goto out; |
431 | } | |
432 | ||
433 | if (v_len < size) { | |
79f6b11a | 434 | wbuf = kvmalloc(size, GFP_KERNEL | __GFP_ZERO); |
f4415848 NJ |
435 | if (!wbuf) { |
436 | err = -ENOMEM; | |
437 | goto out; | |
438 | } | |
439 | ||
440 | if (v_len > 0) | |
441 | memcpy(wbuf, stream_buf, v_len); | |
113ef68d | 442 | kvfree(stream_buf); |
f4415848 NJ |
443 | stream_buf = wbuf; |
444 | } | |
445 | ||
446 | memcpy(&stream_buf[*pos], buf, count); | |
447 | ||
465d7204 | 448 | err = ksmbd_vfs_setxattr(user_ns, |
af34983e | 449 | fp->filp->f_path.dentry, |
f4415848 NJ |
450 | fp->stream.name, |
451 | (void *)stream_buf, | |
452 | size, | |
453 | 0); | |
454 | if (err < 0) | |
455 | goto out; | |
456 | ||
457 | fp->filp->f_pos = *pos; | |
458 | err = 0; | |
459 | out: | |
79f6b11a | 460 | kvfree(stream_buf); |
f4415848 NJ |
461 | return err; |
462 | } | |
463 | ||
464 | /** | |
465 | * ksmbd_vfs_write() - vfs helper for smb file write | |
466 | * @work: work | |
467 | * @fid: file id of open file | |
468 | * @buf: buf containing data for writing | |
469 | * @count: read byte count | |
470 | * @pos: file pos | |
471 | * @sync: fsync after write | |
472 | * @written: number of bytes written | |
473 | * | |
474 | * Return: 0 on success, otherwise error | |
475 | */ | |
476 | int ksmbd_vfs_write(struct ksmbd_work *work, struct ksmbd_file *fp, | |
070fb21e NJ |
477 | char *buf, size_t count, loff_t *pos, bool sync, |
478 | ssize_t *written) | |
f4415848 NJ |
479 | { |
480 | struct ksmbd_session *sess = work->sess; | |
481 | struct file *filp; | |
482 | loff_t offset = *pos; | |
483 | int err = 0; | |
484 | ||
485 | if (sess->conn->connection_type) { | |
486 | if (!(fp->daccess & FILE_WRITE_DATA_LE)) { | |
493fa2fb NJ |
487 | pr_err("no right to write(%pd)\n", |
488 | fp->filp->f_path.dentry); | |
f4415848 NJ |
489 | err = -EACCES; |
490 | goto out; | |
491 | } | |
492 | } | |
493 | ||
494 | filp = fp->filp; | |
495 | ||
496 | if (ksmbd_stream_fd(fp)) { | |
497 | err = ksmbd_vfs_stream_write(fp, buf, pos, count); | |
498 | if (!err) | |
499 | *written = count; | |
500 | goto out; | |
501 | } | |
502 | ||
c36fca86 NJ |
503 | if (!work->tcon->posix_extensions) { |
504 | err = check_lock_range(filp, *pos, *pos + count - 1, WRITE); | |
505 | if (err) { | |
bde1694a | 506 | pr_err("unable to write due to lock\n"); |
c36fca86 NJ |
507 | err = -EAGAIN; |
508 | goto out; | |
509 | } | |
f4415848 NJ |
510 | } |
511 | ||
512 | /* Do we need to break any of a levelII oplock? */ | |
513 | smb_break_all_levII_oplock(work, fp, 1); | |
514 | ||
515 | err = kernel_write(filp, buf, count, pos); | |
516 | if (err < 0) { | |
517 | ksmbd_debug(VFS, "smb write failed, err = %d\n", err); | |
518 | goto out; | |
519 | } | |
520 | ||
521 | filp->f_pos = *pos; | |
522 | *written = err; | |
523 | err = 0; | |
524 | if (sync) { | |
525 | err = vfs_fsync_range(filp, offset, offset + *written, 0); | |
526 | if (err < 0) | |
493fa2fb NJ |
527 | pr_err("fsync failed for filename = %pd, err = %d\n", |
528 | fp->filp->f_path.dentry, err); | |
f4415848 NJ |
529 | } |
530 | ||
531 | out: | |
532 | return err; | |
533 | } | |
534 | ||
535 | /** | |
536 | * ksmbd_vfs_getattr() - vfs helper for smb getattr | |
537 | * @work: work | |
538 | * @fid: file id of open file | |
539 | * @attrs: inode attributes | |
540 | * | |
541 | * Return: 0 on success, otherwise error | |
542 | */ | |
543 | int ksmbd_vfs_getattr(struct path *path, struct kstat *stat) | |
544 | { | |
545 | int err; | |
546 | ||
547 | err = vfs_getattr(path, stat, STATX_BTIME, AT_STATX_SYNC_AS_STAT); | |
548 | if (err) | |
bde1694a | 549 | pr_err("getattr failed, err %d\n", err); |
f4415848 NJ |
550 | return err; |
551 | } | |
552 | ||
553 | /** | |
554 | * ksmbd_vfs_fsync() - vfs helper for smb fsync | |
555 | * @work: work | |
556 | * @fid: file id of open file | |
557 | * | |
558 | * Return: 0 on success, otherwise error | |
559 | */ | |
64b39f4a | 560 | int ksmbd_vfs_fsync(struct ksmbd_work *work, u64 fid, u64 p_id) |
f4415848 NJ |
561 | { |
562 | struct ksmbd_file *fp; | |
563 | int err; | |
564 | ||
565 | fp = ksmbd_lookup_fd_slow(work, fid, p_id); | |
566 | if (!fp) { | |
bde1694a | 567 | pr_err("failed to get filp for fid %llu\n", fid); |
f4415848 NJ |
568 | return -ENOENT; |
569 | } | |
570 | err = vfs_fsync(fp->filp, 0); | |
571 | if (err < 0) | |
bde1694a | 572 | pr_err("smb fsync failed, err = %d\n", err); |
f4415848 NJ |
573 | ksmbd_fd_put(work, fp); |
574 | return err; | |
575 | } | |
576 | ||
577 | /** | |
578 | * ksmbd_vfs_remove_file() - vfs helper for smb rmdir or unlink | |
579 | * @name: absolute directory or file name | |
580 | * | |
581 | * Return: 0 on success, otherwise error | |
582 | */ | |
583 | int ksmbd_vfs_remove_file(struct ksmbd_work *work, char *name) | |
584 | { | |
7c3d3e99 | 585 | struct path path; |
333111a6 | 586 | struct dentry *parent; |
3161ad3a | 587 | int err; |
a6a5fa77 | 588 | int flags = 0; |
f4415848 | 589 | |
f4415848 NJ |
590 | if (ksmbd_override_fsids(work)) |
591 | return -ENOMEM; | |
592 | ||
a6a5fa77 HL |
593 | if (test_share_config_flag(work->tcon->share_conf, |
594 | KSMBD_SHARE_FLAG_FOLLOW_SYMLINKS)) | |
595 | flags = LOOKUP_FOLLOW; | |
596 | ||
597 | err = kern_path(name, flags, &path); | |
f4415848 NJ |
598 | if (err) { |
599 | ksmbd_debug(VFS, "can't get %s, err %d\n", name, err); | |
600 | ksmbd_revert_fsids(work); | |
f4415848 NJ |
601 | return err; |
602 | } | |
603 | ||
7c3d3e99 | 604 | parent = dget_parent(path.dentry); |
333111a6 HL |
605 | err = ksmbd_vfs_lock_parent(parent, path.dentry); |
606 | if (err) { | |
607 | dput(parent); | |
608 | path_put(&path); | |
609 | ksmbd_revert_fsids(work); | |
610 | return err; | |
f4415848 NJ |
611 | } |
612 | ||
333111a6 | 613 | if (!d_inode(path.dentry)->i_nlink) { |
f4415848 NJ |
614 | err = -ENOENT; |
615 | goto out_err; | |
616 | } | |
617 | ||
333111a6 | 618 | if (S_ISDIR(d_inode(path.dentry)->i_mode)) { |
af34983e HL |
619 | err = vfs_rmdir(mnt_user_ns(path.mnt), d_inode(parent), |
620 | path.dentry); | |
f4415848 NJ |
621 | if (err && err != -ENOTEMPTY) |
622 | ksmbd_debug(VFS, "%s: rmdir failed, err %d\n", name, | |
070fb21e | 623 | err); |
f4415848 | 624 | } else { |
af34983e HL |
625 | err = vfs_unlink(mnt_user_ns(path.mnt), d_inode(parent), |
626 | path.dentry, NULL); | |
f4415848 NJ |
627 | if (err) |
628 | ksmbd_debug(VFS, "%s: unlink failed, err %d\n", name, | |
070fb21e | 629 | err); |
f4415848 NJ |
630 | } |
631 | ||
f4415848 | 632 | out_err: |
7c3d3e99 NJ |
633 | inode_unlock(d_inode(parent)); |
634 | dput(parent); | |
635 | path_put(&path); | |
f4415848 NJ |
636 | ksmbd_revert_fsids(work); |
637 | return err; | |
638 | } | |
639 | ||
640 | /** | |
641 | * ksmbd_vfs_link() - vfs helper for creating smb hardlink | |
642 | * @oldname: source file name | |
643 | * @newname: hardlink name | |
644 | * | |
645 | * Return: 0 on success, otherwise error | |
646 | */ | |
64b39f4a | 647 | int ksmbd_vfs_link(struct ksmbd_work *work, const char *oldname, |
070fb21e | 648 | const char *newname) |
f4415848 NJ |
649 | { |
650 | struct path oldpath, newpath; | |
651 | struct dentry *dentry; | |
652 | int err; | |
a6a5fa77 | 653 | int flags = 0; |
f4415848 NJ |
654 | |
655 | if (ksmbd_override_fsids(work)) | |
656 | return -ENOMEM; | |
657 | ||
a6a5fa77 HL |
658 | if (test_share_config_flag(work->tcon->share_conf, |
659 | KSMBD_SHARE_FLAG_FOLLOW_SYMLINKS)) | |
660 | flags = LOOKUP_FOLLOW; | |
661 | ||
662 | err = kern_path(oldname, flags, &oldpath); | |
f4415848 | 663 | if (err) { |
bde1694a NJ |
664 | pr_err("cannot get linux path for %s, err = %d\n", |
665 | oldname, err); | |
f4415848 NJ |
666 | goto out1; |
667 | } | |
668 | ||
669 | dentry = kern_path_create(AT_FDCWD, newname, &newpath, | |
a6a5fa77 | 670 | flags | LOOKUP_REVAL); |
f4415848 NJ |
671 | if (IS_ERR(dentry)) { |
672 | err = PTR_ERR(dentry); | |
bde1694a | 673 | pr_err("path create err for %s, err %d\n", newname, err); |
f4415848 NJ |
674 | goto out2; |
675 | } | |
676 | ||
677 | err = -EXDEV; | |
678 | if (oldpath.mnt != newpath.mnt) { | |
bde1694a | 679 | pr_err("vfs_link failed err %d\n", err); |
f4415848 NJ |
680 | goto out3; |
681 | } | |
682 | ||
af34983e HL |
683 | err = vfs_link(oldpath.dentry, mnt_user_ns(newpath.mnt), |
684 | d_inode(newpath.dentry), | |
070fb21e | 685 | dentry, NULL); |
f4415848 NJ |
686 | if (err) |
687 | ksmbd_debug(VFS, "vfs_link failed err %d\n", err); | |
688 | ||
689 | out3: | |
690 | done_path_create(&newpath, dentry); | |
691 | out2: | |
692 | path_put(&oldpath); | |
693 | out1: | |
694 | ksmbd_revert_fsids(work); | |
695 | return err; | |
696 | } | |
697 | ||
4b637fc1 NJ |
698 | static int ksmbd_validate_entry_in_use(struct dentry *src_dent) |
699 | { | |
700 | struct dentry *dst_dent; | |
701 | ||
702 | spin_lock(&src_dent->d_lock); | |
703 | list_for_each_entry(dst_dent, &src_dent->d_subdirs, d_child) { | |
704 | struct ksmbd_file *child_fp; | |
705 | ||
706 | if (d_really_is_negative(dst_dent)) | |
707 | continue; | |
708 | ||
709 | child_fp = ksmbd_lookup_fd_inode(d_inode(dst_dent)); | |
710 | if (child_fp) { | |
711 | spin_unlock(&src_dent->d_lock); | |
712 | ksmbd_debug(VFS, "Forbid rename, sub file/dir is in use\n"); | |
713 | return -EACCES; | |
714 | } | |
715 | } | |
716 | spin_unlock(&src_dent->d_lock); | |
717 | ||
718 | return 0; | |
719 | } | |
720 | ||
f4415848 | 721 | static int __ksmbd_vfs_rename(struct ksmbd_work *work, |
af34983e | 722 | struct user_namespace *src_user_ns, |
070fb21e NJ |
723 | struct dentry *src_dent_parent, |
724 | struct dentry *src_dent, | |
af34983e | 725 | struct user_namespace *dst_user_ns, |
070fb21e NJ |
726 | struct dentry *dst_dent_parent, |
727 | struct dentry *trap_dent, | |
728 | char *dst_name) | |
f4415848 NJ |
729 | { |
730 | struct dentry *dst_dent; | |
731 | int err; | |
732 | ||
c36fca86 | 733 | if (!work->tcon->posix_extensions) { |
4b637fc1 NJ |
734 | err = ksmbd_validate_entry_in_use(src_dent); |
735 | if (err) | |
736 | return err; | |
f4415848 | 737 | } |
f4415848 NJ |
738 | |
739 | if (d_really_is_negative(src_dent_parent)) | |
740 | return -ENOENT; | |
741 | if (d_really_is_negative(dst_dent_parent)) | |
742 | return -ENOENT; | |
743 | if (d_really_is_negative(src_dent)) | |
744 | return -ENOENT; | |
745 | if (src_dent == trap_dent) | |
746 | return -EINVAL; | |
747 | ||
748 | if (ksmbd_override_fsids(work)) | |
749 | return -ENOMEM; | |
750 | ||
751 | dst_dent = lookup_one_len(dst_name, dst_dent_parent, strlen(dst_name)); | |
752 | err = PTR_ERR(dst_dent); | |
753 | if (IS_ERR(dst_dent)) { | |
bde1694a | 754 | pr_err("lookup failed %s [%d]\n", dst_name, err); |
f4415848 NJ |
755 | goto out; |
756 | } | |
757 | ||
758 | err = -ENOTEMPTY; | |
759 | if (dst_dent != trap_dent && !d_really_is_positive(dst_dent)) { | |
760 | struct renamedata rd = { | |
af34983e | 761 | .old_mnt_userns = src_user_ns, |
f4415848 NJ |
762 | .old_dir = d_inode(src_dent_parent), |
763 | .old_dentry = src_dent, | |
af34983e | 764 | .new_mnt_userns = dst_user_ns, |
f4415848 NJ |
765 | .new_dir = d_inode(dst_dent_parent), |
766 | .new_dentry = dst_dent, | |
767 | }; | |
768 | err = vfs_rename(&rd); | |
769 | } | |
770 | if (err) | |
bde1694a | 771 | pr_err("vfs_rename failed err %d\n", err); |
f4415848 NJ |
772 | if (dst_dent) |
773 | dput(dst_dent); | |
774 | out: | |
775 | ksmbd_revert_fsids(work); | |
776 | return err; | |
777 | } | |
778 | ||
779 | int ksmbd_vfs_fp_rename(struct ksmbd_work *work, struct ksmbd_file *fp, | |
070fb21e | 780 | char *newname) |
f4415848 NJ |
781 | { |
782 | struct path dst_path; | |
783 | struct dentry *src_dent_parent, *dst_dent_parent; | |
ff1d5727 | 784 | struct dentry *src_dent, *trap_dent, *src_child; |
f4415848 NJ |
785 | char *dst_name; |
786 | int err; | |
a6a5fa77 | 787 | int flags; |
f4415848 NJ |
788 | |
789 | dst_name = extract_last_component(newname); | |
790 | if (!dst_name) | |
791 | return -EINVAL; | |
792 | ||
793 | src_dent_parent = dget_parent(fp->filp->f_path.dentry); | |
f4415848 | 794 | src_dent = fp->filp->f_path.dentry; |
f4415848 | 795 | |
a6a5fa77 HL |
796 | flags = LOOKUP_DIRECTORY; |
797 | if (test_share_config_flag(work->tcon->share_conf, | |
798 | KSMBD_SHARE_FLAG_FOLLOW_SYMLINKS)) | |
799 | flags |= LOOKUP_FOLLOW; | |
800 | ||
801 | err = kern_path(newname, flags, &dst_path); | |
f4415848 NJ |
802 | if (err) { |
803 | ksmbd_debug(VFS, "Cannot get path for %s [%d]\n", newname, err); | |
804 | goto out; | |
805 | } | |
806 | dst_dent_parent = dst_path.dentry; | |
f4415848 NJ |
807 | |
808 | trap_dent = lock_rename(src_dent_parent, dst_dent_parent); | |
ff1d5727 NJ |
809 | dget(src_dent); |
810 | dget(dst_dent_parent); | |
811 | src_child = lookup_one_len(src_dent->d_name.name, src_dent_parent, | |
070fb21e | 812 | src_dent->d_name.len); |
ff1d5727 NJ |
813 | if (IS_ERR(src_child)) { |
814 | err = PTR_ERR(src_child); | |
815 | goto out_lock; | |
816 | } | |
817 | ||
818 | if (src_child != src_dent) { | |
819 | err = -ESTALE; | |
820 | dput(src_child); | |
821 | goto out_lock; | |
822 | } | |
823 | dput(src_child); | |
824 | ||
f4415848 | 825 | err = __ksmbd_vfs_rename(work, |
af34983e | 826 | file_mnt_user_ns(fp->filp), |
f4415848 NJ |
827 | src_dent_parent, |
828 | src_dent, | |
af34983e | 829 | mnt_user_ns(dst_path.mnt), |
f4415848 NJ |
830 | dst_dent_parent, |
831 | trap_dent, | |
832 | dst_name); | |
ff1d5727 NJ |
833 | out_lock: |
834 | dput(src_dent); | |
f4415848 | 835 | dput(dst_dent_parent); |
ff1d5727 | 836 | unlock_rename(src_dent_parent, dst_dent_parent); |
f4415848 NJ |
837 | path_put(&dst_path); |
838 | out: | |
f4415848 NJ |
839 | dput(src_dent_parent); |
840 | return err; | |
841 | } | |
842 | ||
843 | /** | |
844 | * ksmbd_vfs_truncate() - vfs helper for smb file truncate | |
845 | * @work: work | |
846 | * @name: old filename | |
847 | * @fid: file id of old file | |
848 | * @size: truncate to given size | |
849 | * | |
850 | * Return: 0 on success, otherwise error | |
851 | */ | |
852 | int ksmbd_vfs_truncate(struct ksmbd_work *work, const char *name, | |
070fb21e | 853 | struct ksmbd_file *fp, loff_t size) |
f4415848 NJ |
854 | { |
855 | struct path path; | |
856 | int err = 0; | |
f4415848 NJ |
857 | |
858 | if (name) { | |
859 | err = kern_path(name, 0, &path); | |
860 | if (err) { | |
bde1694a NJ |
861 | pr_err("cannot get linux path for %s, err %d\n", |
862 | name, err); | |
f4415848 NJ |
863 | return err; |
864 | } | |
865 | err = vfs_truncate(&path, size); | |
866 | if (err) | |
bde1694a NJ |
867 | pr_err("truncate failed for %s err %d\n", |
868 | name, err); | |
f4415848 NJ |
869 | path_put(&path); |
870 | } else { | |
871 | struct file *filp; | |
872 | ||
873 | filp = fp->filp; | |
874 | ||
875 | /* Do we need to break any of a levelII oplock? */ | |
876 | smb_break_all_levII_oplock(work, fp, 1); | |
877 | ||
c36fca86 NJ |
878 | if (!work->tcon->posix_extensions) { |
879 | struct inode *inode = file_inode(filp); | |
f4415848 | 880 | |
c36fca86 NJ |
881 | if (size < inode->i_size) { |
882 | err = check_lock_range(filp, size, | |
070fb21e | 883 | inode->i_size - 1, WRITE); |
c36fca86 NJ |
884 | } else { |
885 | err = check_lock_range(filp, inode->i_size, | |
070fb21e | 886 | size - 1, WRITE); |
c36fca86 NJ |
887 | } |
888 | ||
889 | if (err) { | |
bde1694a | 890 | pr_err("failed due to lock\n"); |
c36fca86 NJ |
891 | return -EAGAIN; |
892 | } | |
f4415848 NJ |
893 | } |
894 | ||
895 | err = vfs_truncate(&filp->f_path, size); | |
896 | if (err) | |
bde1694a NJ |
897 | pr_err("truncate failed for filename : %s err %d\n", |
898 | fp->filename, err); | |
f4415848 NJ |
899 | } |
900 | ||
901 | return err; | |
902 | } | |
903 | ||
904 | /** | |
905 | * ksmbd_vfs_listxattr() - vfs helper for smb list extended attributes | |
906 | * @dentry: dentry of file for listing xattrs | |
907 | * @list: destination buffer | |
908 | * @size: destination buffer length | |
909 | * | |
910 | * Return: xattr list length on success, otherwise error | |
911 | */ | |
912 | ssize_t ksmbd_vfs_listxattr(struct dentry *dentry, char **list) | |
913 | { | |
914 | ssize_t size; | |
915 | char *vlist = NULL; | |
916 | ||
917 | size = vfs_listxattr(dentry, NULL, 0); | |
918 | if (size <= 0) | |
919 | return size; | |
920 | ||
79f6b11a | 921 | vlist = kvmalloc(size, GFP_KERNEL | __GFP_ZERO); |
f4415848 NJ |
922 | if (!vlist) |
923 | return -ENOMEM; | |
924 | ||
925 | *list = vlist; | |
926 | size = vfs_listxattr(dentry, vlist, size); | |
927 | if (size < 0) { | |
928 | ksmbd_debug(VFS, "listxattr failed\n"); | |
79f6b11a | 929 | kvfree(vlist); |
f4415848 NJ |
930 | *list = NULL; |
931 | } | |
932 | ||
933 | return size; | |
934 | } | |
935 | ||
af34983e HL |
936 | static ssize_t ksmbd_vfs_xattr_len(struct user_namespace *user_ns, |
937 | struct dentry *dentry, char *xattr_name) | |
f4415848 | 938 | { |
af34983e | 939 | return vfs_getxattr(user_ns, dentry, xattr_name, NULL, 0); |
f4415848 NJ |
940 | } |
941 | ||
942 | /** | |
943 | * ksmbd_vfs_getxattr() - vfs helper for smb get extended attributes value | |
af34983e | 944 | * @user_ns: user namespace |
f4415848 NJ |
945 | * @dentry: dentry of file for getting xattrs |
946 | * @xattr_name: name of xattr name to query | |
947 | * @xattr_buf: destination buffer xattr value | |
948 | * | |
949 | * Return: read xattr value length on success, otherwise error | |
950 | */ | |
af34983e HL |
951 | ssize_t ksmbd_vfs_getxattr(struct user_namespace *user_ns, |
952 | struct dentry *dentry, | |
953 | char *xattr_name, char **xattr_buf) | |
f4415848 NJ |
954 | { |
955 | ssize_t xattr_len; | |
956 | char *buf; | |
957 | ||
958 | *xattr_buf = NULL; | |
af34983e | 959 | xattr_len = ksmbd_vfs_xattr_len(user_ns, dentry, xattr_name); |
f4415848 NJ |
960 | if (xattr_len < 0) |
961 | return xattr_len; | |
962 | ||
963 | buf = kmalloc(xattr_len + 1, GFP_KERNEL); | |
964 | if (!buf) | |
965 | return -ENOMEM; | |
966 | ||
af34983e | 967 | xattr_len = vfs_getxattr(user_ns, dentry, xattr_name, |
d7e5852b | 968 | (void *)buf, xattr_len); |
f4415848 NJ |
969 | if (xattr_len > 0) |
970 | *xattr_buf = buf; | |
971 | else | |
972 | kfree(buf); | |
973 | return xattr_len; | |
974 | } | |
975 | ||
976 | /** | |
977 | * ksmbd_vfs_setxattr() - vfs helper for smb set extended attributes value | |
af34983e | 978 | * @user_ns: user namespace |
f4415848 NJ |
979 | * @dentry: dentry to set XATTR at |
980 | * @name: xattr name for setxattr | |
981 | * @value: xattr value to set | |
982 | * @size: size of xattr value | |
983 | * @flags: destination buffer length | |
984 | * | |
985 | * Return: 0 on success, otherwise error | |
986 | */ | |
af34983e HL |
987 | int ksmbd_vfs_setxattr(struct user_namespace *user_ns, |
988 | struct dentry *dentry, const char *attr_name, | |
070fb21e | 989 | const void *attr_value, size_t attr_size, int flags) |
f4415848 NJ |
990 | { |
991 | int err; | |
992 | ||
af34983e HL |
993 | err = vfs_setxattr(user_ns, |
994 | dentry, | |
f4415848 NJ |
995 | attr_name, |
996 | attr_value, | |
997 | attr_size, | |
998 | flags); | |
999 | if (err) | |
1000 | ksmbd_debug(VFS, "setxattr failed, err %d\n", err); | |
1001 | return err; | |
1002 | } | |
1003 | ||
1004 | /** | |
1005 | * ksmbd_vfs_set_fadvise() - convert smb IO caching options to linux options | |
1006 | * @filp: file pointer for IO | |
1007 | * @options: smb IO options | |
1008 | */ | |
1009 | void ksmbd_vfs_set_fadvise(struct file *filp, __le32 option) | |
1010 | { | |
1011 | struct address_space *mapping; | |
1012 | ||
1013 | mapping = filp->f_mapping; | |
1014 | ||
1015 | if (!option || !mapping) | |
1016 | return; | |
1017 | ||
64b39f4a | 1018 | if (option & FILE_WRITE_THROUGH_LE) { |
f4415848 | 1019 | filp->f_flags |= O_SYNC; |
64b39f4a | 1020 | } else if (option & FILE_SEQUENTIAL_ONLY_LE) { |
f4415848 NJ |
1021 | filp->f_ra.ra_pages = inode_to_bdi(mapping->host)->ra_pages * 2; |
1022 | spin_lock(&filp->f_lock); | |
1023 | filp->f_mode &= ~FMODE_RANDOM; | |
1024 | spin_unlock(&filp->f_lock); | |
1025 | } else if (option & FILE_RANDOM_ACCESS_LE) { | |
1026 | spin_lock(&filp->f_lock); | |
1027 | filp->f_mode |= FMODE_RANDOM; | |
1028 | spin_unlock(&filp->f_lock); | |
1029 | } | |
1030 | } | |
1031 | ||
64b39f4a | 1032 | int ksmbd_vfs_zero_data(struct ksmbd_work *work, struct ksmbd_file *fp, |
070fb21e | 1033 | loff_t off, loff_t len) |
f4415848 NJ |
1034 | { |
1035 | smb_break_all_levII_oplock(work, fp, 1); | |
1036 | if (fp->f_ci->m_fattr & ATTR_SPARSE_FILE_LE) | |
1037 | return vfs_fallocate(fp->filp, | |
070fb21e NJ |
1038 | FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, |
1039 | off, len); | |
f4415848 NJ |
1040 | |
1041 | return vfs_fallocate(fp->filp, FALLOC_FL_ZERO_RANGE, off, len); | |
1042 | } | |
1043 | ||
1044 | int ksmbd_vfs_fqar_lseek(struct ksmbd_file *fp, loff_t start, loff_t length, | |
070fb21e NJ |
1045 | struct file_allocated_range_buffer *ranges, |
1046 | int in_count, int *out_count) | |
f4415848 NJ |
1047 | { |
1048 | struct file *f = fp->filp; | |
ab0b263b | 1049 | struct inode *inode = file_inode(fp->filp); |
f4415848 NJ |
1050 | loff_t maxbytes = (u64)inode->i_sb->s_maxbytes, end; |
1051 | loff_t extent_start, extent_end; | |
1052 | int ret = 0; | |
1053 | ||
1054 | if (start > maxbytes) | |
1055 | return -EFBIG; | |
1056 | ||
1057 | if (!in_count) | |
1058 | return 0; | |
1059 | ||
1060 | /* | |
1061 | * Shrink request scope to what the fs can actually handle. | |
1062 | */ | |
1063 | if (length > maxbytes || (maxbytes - length) < start) | |
1064 | length = maxbytes - start; | |
1065 | ||
1066 | if (start + length > inode->i_size) | |
1067 | length = inode->i_size - start; | |
1068 | ||
1069 | *out_count = 0; | |
1070 | end = start + length; | |
1071 | while (start < end && *out_count < in_count) { | |
1072 | extent_start = f->f_op->llseek(f, start, SEEK_DATA); | |
1073 | if (extent_start < 0) { | |
1074 | if (extent_start != -ENXIO) | |
1075 | ret = (int)extent_start; | |
1076 | break; | |
1077 | } | |
1078 | ||
1079 | if (extent_start >= end) | |
1080 | break; | |
1081 | ||
1082 | extent_end = f->f_op->llseek(f, extent_start, SEEK_HOLE); | |
1083 | if (extent_end < 0) { | |
1084 | if (extent_end != -ENXIO) | |
1085 | ret = (int)extent_end; | |
1086 | break; | |
64b39f4a | 1087 | } else if (extent_start >= extent_end) { |
f4415848 | 1088 | break; |
64b39f4a | 1089 | } |
f4415848 NJ |
1090 | |
1091 | ranges[*out_count].file_offset = cpu_to_le64(extent_start); | |
1092 | ranges[(*out_count)++].length = | |
1093 | cpu_to_le64(min(extent_end, end) - extent_start); | |
1094 | ||
1095 | start = extent_end; | |
1096 | } | |
1097 | ||
1098 | return ret; | |
1099 | } | |
1100 | ||
af34983e HL |
1101 | int ksmbd_vfs_remove_xattr(struct user_namespace *user_ns, |
1102 | struct dentry *dentry, char *attr_name) | |
f4415848 | 1103 | { |
af34983e | 1104 | return vfs_removexattr(user_ns, dentry, attr_name); |
f4415848 NJ |
1105 | } |
1106 | ||
af34983e HL |
1107 | int ksmbd_vfs_unlink(struct user_namespace *user_ns, |
1108 | struct dentry *dir, struct dentry *dentry) | |
f4415848 NJ |
1109 | { |
1110 | int err = 0; | |
1111 | ||
333111a6 HL |
1112 | err = ksmbd_vfs_lock_parent(dir, dentry); |
1113 | if (err) | |
1114 | return err; | |
ff1d5727 | 1115 | dget(dentry); |
f4415848 NJ |
1116 | |
1117 | if (S_ISDIR(d_inode(dentry)->i_mode)) | |
af34983e | 1118 | err = vfs_rmdir(user_ns, d_inode(dir), dentry); |
f4415848 | 1119 | else |
af34983e | 1120 | err = vfs_unlink(user_ns, d_inode(dir), dentry, NULL); |
f4415848 | 1121 | |
f4415848 | 1122 | dput(dentry); |
ff1d5727 | 1123 | inode_unlock(d_inode(dir)); |
f4415848 NJ |
1124 | if (err) |
1125 | ksmbd_debug(VFS, "failed to delete, err %d\n", err); | |
1126 | ||
1127 | return err; | |
1128 | } | |
1129 | ||
64b39f4a | 1130 | static int __dir_empty(struct dir_context *ctx, const char *name, int namlen, |
070fb21e | 1131 | loff_t offset, u64 ino, unsigned int d_type) |
f4415848 NJ |
1132 | { |
1133 | struct ksmbd_readdir_data *buf; | |
1134 | ||
1135 | buf = container_of(ctx, struct ksmbd_readdir_data, ctx); | |
1136 | buf->dirent_count++; | |
1137 | ||
1138 | if (buf->dirent_count > 2) | |
1139 | return -ENOTEMPTY; | |
1140 | return 0; | |
1141 | } | |
1142 | ||
1143 | /** | |
1144 | * ksmbd_vfs_empty_dir() - check for empty directory | |
1145 | * @fp: ksmbd file pointer | |
1146 | * | |
1147 | * Return: true if directory empty, otherwise false | |
1148 | */ | |
1149 | int ksmbd_vfs_empty_dir(struct ksmbd_file *fp) | |
1150 | { | |
1151 | int err; | |
1152 | struct ksmbd_readdir_data readdir_data; | |
1153 | ||
1154 | memset(&readdir_data, 0, sizeof(struct ksmbd_readdir_data)); | |
1155 | ||
1156 | set_ctx_actor(&readdir_data.ctx, __dir_empty); | |
1157 | readdir_data.dirent_count = 0; | |
1158 | ||
e8c06191 | 1159 | err = iterate_dir(fp->filp, &readdir_data.ctx); |
f4415848 NJ |
1160 | if (readdir_data.dirent_count > 2) |
1161 | err = -ENOTEMPTY; | |
1162 | else | |
1163 | err = 0; | |
1164 | return err; | |
1165 | } | |
1166 | ||
64b39f4a | 1167 | static int __caseless_lookup(struct dir_context *ctx, const char *name, |
070fb21e NJ |
1168 | int namlen, loff_t offset, u64 ino, |
1169 | unsigned int d_type) | |
f4415848 NJ |
1170 | { |
1171 | struct ksmbd_readdir_data *buf; | |
1172 | ||
1173 | buf = container_of(ctx, struct ksmbd_readdir_data, ctx); | |
1174 | ||
1175 | if (buf->used != namlen) | |
1176 | return 0; | |
1177 | if (!strncasecmp((char *)buf->private, name, namlen)) { | |
1178 | memcpy((char *)buf->private, name, namlen); | |
1179 | buf->dirent_count = 1; | |
1180 | return -EEXIST; | |
1181 | } | |
1182 | return 0; | |
1183 | } | |
1184 | ||
1185 | /** | |
1186 | * ksmbd_vfs_lookup_in_dir() - lookup a file in a directory | |
3c203783 HL |
1187 | * @dir: path info |
1188 | * @name: filename to lookup | |
1189 | * @namelen: filename length | |
f4415848 NJ |
1190 | * |
1191 | * Return: 0 on success, otherwise error | |
1192 | */ | |
3c203783 | 1193 | static int ksmbd_vfs_lookup_in_dir(struct path *dir, char *name, size_t namelen) |
f4415848 | 1194 | { |
f4415848 NJ |
1195 | int ret; |
1196 | struct file *dfilp; | |
64b39f4a | 1197 | int flags = O_RDONLY | O_LARGEFILE; |
f4415848 NJ |
1198 | struct ksmbd_readdir_data readdir_data = { |
1199 | .ctx.actor = __caseless_lookup, | |
3c203783 HL |
1200 | .private = name, |
1201 | .used = namelen, | |
1202 | .dirent_count = 0, | |
f4415848 NJ |
1203 | }; |
1204 | ||
3c203783 HL |
1205 | dfilp = dentry_open(dir, flags, current_cred()); |
1206 | if (IS_ERR(dfilp)) | |
1207 | return PTR_ERR(dfilp); | |
f4415848 | 1208 | |
e8c06191 | 1209 | ret = iterate_dir(dfilp, &readdir_data.ctx); |
f4415848 NJ |
1210 | if (readdir_data.dirent_count > 0) |
1211 | ret = 0; | |
f4415848 | 1212 | fput(dfilp); |
f4415848 NJ |
1213 | return ret; |
1214 | } | |
1215 | ||
1216 | /** | |
1217 | * ksmbd_vfs_kern_path() - lookup a file and get path info | |
1218 | * @name: name of file for lookup | |
1219 | * @flags: lookup flags | |
1220 | * @path: if lookup succeed, return path info | |
1221 | * @caseless: caseless filename lookup | |
1222 | * | |
1223 | * Return: 0 on success, otherwise error | |
1224 | */ | |
1225 | int ksmbd_vfs_kern_path(char *name, unsigned int flags, struct path *path, | |
070fb21e | 1226 | bool caseless) |
f4415848 | 1227 | { |
f4415848 NJ |
1228 | int err; |
1229 | ||
3c203783 HL |
1230 | if (name[0] != '/') |
1231 | return -EINVAL; | |
1232 | ||
f4415848 NJ |
1233 | err = kern_path(name, flags, path); |
1234 | if (!err) | |
3c203783 | 1235 | return 0; |
f4415848 NJ |
1236 | |
1237 | if (caseless) { | |
3c203783 HL |
1238 | char *filepath; |
1239 | struct path parent; | |
1240 | size_t path_len, remain_len; | |
f4415848 | 1241 | |
3c203783 HL |
1242 | filepath = kstrdup(name, GFP_KERNEL); |
1243 | if (!filepath) | |
1244 | return -ENOMEM; | |
1245 | ||
1246 | path_len = strlen(filepath); | |
1247 | remain_len = path_len - 1; | |
f4415848 | 1248 | |
3c203783 | 1249 | err = kern_path("/", flags, &parent); |
f4415848 NJ |
1250 | if (err) |
1251 | goto out; | |
f4415848 | 1252 | |
3c203783 HL |
1253 | while (d_can_lookup(parent.dentry)) { |
1254 | char *filename = filepath + path_len - remain_len; | |
1255 | char *next = strchrnul(filename, '/'); | |
1256 | size_t filename_len = next - filename; | |
1257 | bool is_last = !next[0]; | |
1258 | ||
1259 | if (filename_len == 0) | |
1260 | break; | |
1261 | ||
1262 | err = ksmbd_vfs_lookup_in_dir(&parent, filename, | |
1263 | filename_len); | |
1264 | if (err) { | |
1265 | path_put(&parent); | |
1266 | goto out; | |
1267 | } | |
1268 | ||
1269 | path_put(&parent); | |
1270 | next[0] = '\0'; | |
1271 | ||
1272 | err = kern_path(filepath, flags, &parent); | |
1273 | if (err) | |
1274 | goto out; | |
1275 | ||
1276 | if (is_last) { | |
1277 | path->mnt = parent.mnt; | |
1278 | path->dentry = parent.dentry; | |
1279 | goto out; | |
1280 | } | |
1281 | ||
1282 | next[0] = '/'; | |
1283 | remain_len -= filename_len + 1; | |
1284 | } | |
1285 | ||
1286 | path_put(&parent); | |
1287 | err = -EINVAL; | |
f4415848 | 1288 | out: |
3c203783 HL |
1289 | kfree(filepath); |
1290 | } | |
f4415848 NJ |
1291 | return err; |
1292 | } | |
1293 | ||
af34983e HL |
1294 | int ksmbd_vfs_remove_acl_xattrs(struct user_namespace *user_ns, |
1295 | struct dentry *dentry) | |
f4415848 NJ |
1296 | { |
1297 | char *name, *xattr_list = NULL; | |
1298 | ssize_t xattr_list_len; | |
1299 | int err = 0; | |
1300 | ||
1301 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
1302 | if (xattr_list_len < 0) { | |
1303 | goto out; | |
1304 | } else if (!xattr_list_len) { | |
1305 | ksmbd_debug(SMB, "empty xattr in the file\n"); | |
1306 | goto out; | |
1307 | } | |
1308 | ||
1309 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
070fb21e | 1310 | name += strlen(name) + 1) { |
f4415848 NJ |
1311 | ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name)); |
1312 | ||
1313 | if (!strncmp(name, XATTR_NAME_POSIX_ACL_ACCESS, | |
64b39f4a | 1314 | sizeof(XATTR_NAME_POSIX_ACL_ACCESS) - 1) || |
f4415848 | 1315 | !strncmp(name, XATTR_NAME_POSIX_ACL_DEFAULT, |
64b39f4a | 1316 | sizeof(XATTR_NAME_POSIX_ACL_DEFAULT) - 1)) { |
af34983e | 1317 | err = ksmbd_vfs_remove_xattr(user_ns, dentry, name); |
f4415848 NJ |
1318 | if (err) |
1319 | ksmbd_debug(SMB, | |
070fb21e | 1320 | "remove acl xattr failed : %s\n", name); |
f4415848 NJ |
1321 | } |
1322 | } | |
1323 | out: | |
79f6b11a | 1324 | kvfree(xattr_list); |
f4415848 NJ |
1325 | return err; |
1326 | } | |
1327 | ||
af34983e HL |
1328 | int ksmbd_vfs_remove_sd_xattrs(struct user_namespace *user_ns, |
1329 | struct dentry *dentry) | |
f4415848 NJ |
1330 | { |
1331 | char *name, *xattr_list = NULL; | |
1332 | ssize_t xattr_list_len; | |
1333 | int err = 0; | |
1334 | ||
1335 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
1336 | if (xattr_list_len < 0) { | |
1337 | goto out; | |
1338 | } else if (!xattr_list_len) { | |
1339 | ksmbd_debug(SMB, "empty xattr in the file\n"); | |
1340 | goto out; | |
1341 | } | |
1342 | ||
1343 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
1344 | name += strlen(name) + 1) { | |
1345 | ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name)); | |
1346 | ||
1347 | if (!strncmp(name, XATTR_NAME_SD, XATTR_NAME_SD_LEN)) { | |
af34983e | 1348 | err = ksmbd_vfs_remove_xattr(user_ns, dentry, name); |
f4415848 NJ |
1349 | if (err) |
1350 | ksmbd_debug(SMB, "remove xattr failed : %s\n", name); | |
1351 | } | |
1352 | } | |
1353 | out: | |
79f6b11a | 1354 | kvfree(xattr_list); |
f4415848 NJ |
1355 | return err; |
1356 | } | |
1357 | ||
af34983e HL |
1358 | static struct xattr_smb_acl *ksmbd_vfs_make_xattr_posix_acl(struct user_namespace *user_ns, |
1359 | struct inode *inode, | |
070fb21e | 1360 | int acl_type) |
f4415848 NJ |
1361 | { |
1362 | struct xattr_smb_acl *smb_acl = NULL; | |
1363 | struct posix_acl *posix_acls; | |
1364 | struct posix_acl_entry *pa_entry; | |
1365 | struct xattr_acl_entry *xa_entry; | |
1366 | int i; | |
1367 | ||
67d1c432 | 1368 | posix_acls = get_acl(inode, acl_type); |
f4415848 NJ |
1369 | if (!posix_acls) |
1370 | return NULL; | |
1371 | ||
1372 | smb_acl = kzalloc(sizeof(struct xattr_smb_acl) + | |
1373 | sizeof(struct xattr_acl_entry) * posix_acls->a_count, | |
1374 | GFP_KERNEL); | |
1375 | if (!smb_acl) | |
1376 | goto out; | |
1377 | ||
1378 | smb_acl->count = posix_acls->a_count; | |
1379 | pa_entry = posix_acls->a_entries; | |
1380 | xa_entry = smb_acl->entries; | |
1381 | for (i = 0; i < posix_acls->a_count; i++, pa_entry++, xa_entry++) { | |
1382 | switch (pa_entry->e_tag) { | |
1383 | case ACL_USER: | |
1384 | xa_entry->type = SMB_ACL_USER; | |
af34983e | 1385 | xa_entry->uid = from_kuid(user_ns, pa_entry->e_uid); |
f4415848 NJ |
1386 | break; |
1387 | case ACL_USER_OBJ: | |
1388 | xa_entry->type = SMB_ACL_USER_OBJ; | |
1389 | break; | |
1390 | case ACL_GROUP: | |
1391 | xa_entry->type = SMB_ACL_GROUP; | |
af34983e | 1392 | xa_entry->gid = from_kgid(user_ns, pa_entry->e_gid); |
f4415848 NJ |
1393 | break; |
1394 | case ACL_GROUP_OBJ: | |
1395 | xa_entry->type = SMB_ACL_GROUP_OBJ; | |
1396 | break; | |
1397 | case ACL_OTHER: | |
1398 | xa_entry->type = SMB_ACL_OTHER; | |
1399 | break; | |
1400 | case ACL_MASK: | |
1401 | xa_entry->type = SMB_ACL_MASK; | |
1402 | break; | |
1403 | default: | |
bde1694a | 1404 | pr_err("unknown type : 0x%x\n", pa_entry->e_tag); |
f4415848 NJ |
1405 | goto out; |
1406 | } | |
1407 | ||
1408 | if (pa_entry->e_perm & ACL_READ) | |
1409 | xa_entry->perm |= SMB_ACL_READ; | |
1410 | if (pa_entry->e_perm & ACL_WRITE) | |
1411 | xa_entry->perm |= SMB_ACL_WRITE; | |
1412 | if (pa_entry->e_perm & ACL_EXECUTE) | |
1413 | xa_entry->perm |= SMB_ACL_EXECUTE; | |
1414 | } | |
1415 | out: | |
1416 | posix_acl_release(posix_acls); | |
1417 | return smb_acl; | |
1418 | } | |
1419 | ||
af34983e HL |
1420 | int ksmbd_vfs_set_sd_xattr(struct ksmbd_conn *conn, |
1421 | struct user_namespace *user_ns, | |
1422 | struct dentry *dentry, | |
070fb21e | 1423 | struct smb_ntsd *pntsd, int len) |
f4415848 NJ |
1424 | { |
1425 | int rc; | |
1426 | struct ndr sd_ndr = {0}, acl_ndr = {0}; | |
1427 | struct xattr_ntacl acl = {0}; | |
1428 | struct xattr_smb_acl *smb_acl, *def_smb_acl = NULL; | |
fba08fa0 | 1429 | struct inode *inode = d_inode(dentry); |
f4415848 NJ |
1430 | |
1431 | acl.version = 4; | |
1432 | acl.hash_type = XATTR_SD_HASH_TYPE_SHA256; | |
fba08fa0 | 1433 | acl.current_time = ksmbd_UnixTimeToNT(current_time(inode)); |
f4415848 NJ |
1434 | |
1435 | memcpy(acl.desc, "posix_acl", 9); | |
1436 | acl.desc_len = 10; | |
1437 | ||
1438 | pntsd->osidoffset = | |
1439 | cpu_to_le32(le32_to_cpu(pntsd->osidoffset) + NDR_NTSD_OFFSETOF); | |
1440 | pntsd->gsidoffset = | |
1441 | cpu_to_le32(le32_to_cpu(pntsd->gsidoffset) + NDR_NTSD_OFFSETOF); | |
1442 | pntsd->dacloffset = | |
1443 | cpu_to_le32(le32_to_cpu(pntsd->dacloffset) + NDR_NTSD_OFFSETOF); | |
1444 | ||
1445 | acl.sd_buf = (char *)pntsd; | |
1446 | acl.sd_size = len; | |
1447 | ||
1448 | rc = ksmbd_gen_sd_hash(conn, acl.sd_buf, acl.sd_size, acl.hash); | |
1449 | if (rc) { | |
bde1694a | 1450 | pr_err("failed to generate hash for ndr acl\n"); |
f4415848 NJ |
1451 | return rc; |
1452 | } | |
1453 | ||
af34983e HL |
1454 | smb_acl = ksmbd_vfs_make_xattr_posix_acl(user_ns, inode, |
1455 | ACL_TYPE_ACCESS); | |
f4415848 | 1456 | if (S_ISDIR(inode->i_mode)) |
af34983e | 1457 | def_smb_acl = ksmbd_vfs_make_xattr_posix_acl(user_ns, inode, |
070fb21e | 1458 | ACL_TYPE_DEFAULT); |
f4415848 | 1459 | |
af34983e HL |
1460 | rc = ndr_encode_posix_acl(&acl_ndr, user_ns, inode, |
1461 | smb_acl, def_smb_acl); | |
f4415848 | 1462 | if (rc) { |
bde1694a | 1463 | pr_err("failed to encode ndr to posix acl\n"); |
f4415848 NJ |
1464 | goto out; |
1465 | } | |
1466 | ||
1467 | rc = ksmbd_gen_sd_hash(conn, acl_ndr.data, acl_ndr.offset, | |
070fb21e | 1468 | acl.posix_acl_hash); |
f4415848 | 1469 | if (rc) { |
bde1694a | 1470 | pr_err("failed to generate hash for ndr acl\n"); |
f4415848 NJ |
1471 | goto out; |
1472 | } | |
1473 | ||
1474 | rc = ndr_encode_v4_ntacl(&sd_ndr, &acl); | |
1475 | if (rc) { | |
bde1694a | 1476 | pr_err("failed to encode ndr to posix acl\n"); |
f4415848 NJ |
1477 | goto out; |
1478 | } | |
1479 | ||
af34983e HL |
1480 | rc = ksmbd_vfs_setxattr(user_ns, dentry, |
1481 | XATTR_NAME_SD, sd_ndr.data, | |
070fb21e | 1482 | sd_ndr.offset, 0); |
f4415848 | 1483 | if (rc < 0) |
bde1694a | 1484 | pr_err("Failed to store XATTR ntacl :%d\n", rc); |
f4415848 NJ |
1485 | |
1486 | kfree(sd_ndr.data); | |
1487 | out: | |
1488 | kfree(acl_ndr.data); | |
1489 | kfree(smb_acl); | |
1490 | kfree(def_smb_acl); | |
1491 | return rc; | |
1492 | } | |
1493 | ||
af34983e HL |
1494 | int ksmbd_vfs_get_sd_xattr(struct ksmbd_conn *conn, |
1495 | struct user_namespace *user_ns, | |
1496 | struct dentry *dentry, | |
070fb21e | 1497 | struct smb_ntsd **pntsd) |
f4415848 NJ |
1498 | { |
1499 | int rc; | |
1500 | struct ndr n; | |
1501 | ||
af34983e | 1502 | rc = ksmbd_vfs_getxattr(user_ns, dentry, XATTR_NAME_SD, &n.data); |
f4415848 | 1503 | if (rc > 0) { |
fba08fa0 | 1504 | struct inode *inode = d_inode(dentry); |
f4415848 NJ |
1505 | struct ndr acl_ndr = {0}; |
1506 | struct xattr_ntacl acl; | |
1507 | struct xattr_smb_acl *smb_acl = NULL, *def_smb_acl = NULL; | |
1508 | __u8 cmp_hash[XATTR_SD_HASH_SIZE] = {0}; | |
1509 | ||
1510 | n.length = rc; | |
1511 | rc = ndr_decode_v4_ntacl(&n, &acl); | |
1512 | if (rc) | |
1513 | return rc; | |
1514 | ||
af34983e | 1515 | smb_acl = ksmbd_vfs_make_xattr_posix_acl(user_ns, inode, |
070fb21e | 1516 | ACL_TYPE_ACCESS); |
f4415848 | 1517 | if (S_ISDIR(inode->i_mode)) |
af34983e HL |
1518 | def_smb_acl = ksmbd_vfs_make_xattr_posix_acl(user_ns, |
1519 | inode, | |
070fb21e | 1520 | ACL_TYPE_DEFAULT); |
f4415848 | 1521 | |
af34983e HL |
1522 | rc = ndr_encode_posix_acl(&acl_ndr, user_ns, inode, |
1523 | smb_acl, def_smb_acl); | |
f4415848 | 1524 | if (rc) { |
bde1694a | 1525 | pr_err("failed to encode ndr to posix acl\n"); |
f4415848 NJ |
1526 | goto out; |
1527 | } | |
1528 | ||
1529 | rc = ksmbd_gen_sd_hash(conn, acl_ndr.data, acl_ndr.offset, | |
070fb21e | 1530 | cmp_hash); |
f4415848 | 1531 | if (rc) { |
bde1694a | 1532 | pr_err("failed to generate hash for ndr acl\n"); |
f4415848 NJ |
1533 | goto out; |
1534 | } | |
1535 | ||
1536 | if (memcmp(cmp_hash, acl.posix_acl_hash, XATTR_SD_HASH_SIZE)) { | |
bde1694a | 1537 | pr_err("hash value diff\n"); |
f4415848 NJ |
1538 | rc = -EINVAL; |
1539 | goto out; | |
1540 | } | |
1541 | ||
1542 | *pntsd = acl.sd_buf; | |
1543 | (*pntsd)->osidoffset = | |
1544 | cpu_to_le32(le32_to_cpu((*pntsd)->osidoffset) - NDR_NTSD_OFFSETOF); | |
1545 | (*pntsd)->gsidoffset = | |
1546 | cpu_to_le32(le32_to_cpu((*pntsd)->gsidoffset) - NDR_NTSD_OFFSETOF); | |
1547 | (*pntsd)->dacloffset = | |
1548 | cpu_to_le32(le32_to_cpu((*pntsd)->dacloffset) - NDR_NTSD_OFFSETOF); | |
1549 | ||
1550 | rc = acl.sd_size; | |
1551 | out: | |
1552 | kfree(n.data); | |
1553 | kfree(acl_ndr.data); | |
1554 | kfree(smb_acl); | |
1555 | kfree(def_smb_acl); | |
1556 | } | |
1557 | ||
1558 | return rc; | |
1559 | } | |
1560 | ||
af34983e HL |
1561 | int ksmbd_vfs_set_dos_attrib_xattr(struct user_namespace *user_ns, |
1562 | struct dentry *dentry, | |
070fb21e | 1563 | struct xattr_dos_attrib *da) |
f4415848 NJ |
1564 | { |
1565 | struct ndr n; | |
1566 | int err; | |
1567 | ||
1568 | err = ndr_encode_dos_attr(&n, da); | |
1569 | if (err) | |
1570 | return err; | |
1571 | ||
af34983e | 1572 | err = ksmbd_vfs_setxattr(user_ns, dentry, XATTR_NAME_DOS_ATTRIBUTE, |
070fb21e | 1573 | (void *)n.data, n.offset, 0); |
f4415848 NJ |
1574 | if (err) |
1575 | ksmbd_debug(SMB, "failed to store dos attribute in xattr\n"); | |
1576 | kfree(n.data); | |
1577 | ||
1578 | return err; | |
1579 | } | |
1580 | ||
af34983e HL |
1581 | int ksmbd_vfs_get_dos_attrib_xattr(struct user_namespace *user_ns, |
1582 | struct dentry *dentry, | |
070fb21e | 1583 | struct xattr_dos_attrib *da) |
f4415848 NJ |
1584 | { |
1585 | struct ndr n; | |
1586 | int err; | |
1587 | ||
af34983e | 1588 | err = ksmbd_vfs_getxattr(user_ns, dentry, XATTR_NAME_DOS_ATTRIBUTE, |
070fb21e | 1589 | (char **)&n.data); |
f4415848 NJ |
1590 | if (err > 0) { |
1591 | n.length = err; | |
1592 | if (ndr_decode_dos_attr(&n, da)) | |
1593 | err = -EINVAL; | |
79f6b11a | 1594 | kfree(n.data); |
64b39f4a | 1595 | } else { |
f4415848 | 1596 | ksmbd_debug(SMB, "failed to load dos attribute in xattr\n"); |
64b39f4a | 1597 | } |
f4415848 NJ |
1598 | |
1599 | return err; | |
1600 | } | |
1601 | ||
f4415848 NJ |
1602 | /** |
1603 | * ksmbd_vfs_init_kstat() - convert unix stat information to smb stat format | |
1604 | * @p: destination buffer | |
1605 | * @ksmbd_kstat: ksmbd kstat wrapper | |
1606 | */ | |
1607 | void *ksmbd_vfs_init_kstat(char **p, struct ksmbd_kstat *ksmbd_kstat) | |
1608 | { | |
1609 | struct file_directory_info *info = (struct file_directory_info *)(*p); | |
1610 | struct kstat *kstat = ksmbd_kstat->kstat; | |
1611 | u64 time; | |
1612 | ||
1613 | info->FileIndex = 0; | |
1614 | info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time); | |
1615 | time = ksmbd_UnixTimeToNT(kstat->atime); | |
1616 | info->LastAccessTime = cpu_to_le64(time); | |
1617 | time = ksmbd_UnixTimeToNT(kstat->mtime); | |
1618 | info->LastWriteTime = cpu_to_le64(time); | |
1619 | time = ksmbd_UnixTimeToNT(kstat->ctime); | |
1620 | info->ChangeTime = cpu_to_le64(time); | |
1621 | ||
1622 | if (ksmbd_kstat->file_attributes & ATTR_DIRECTORY_LE) { | |
1623 | info->EndOfFile = 0; | |
1624 | info->AllocationSize = 0; | |
1625 | } else { | |
1626 | info->EndOfFile = cpu_to_le64(kstat->size); | |
1627 | info->AllocationSize = cpu_to_le64(kstat->blocks << 9); | |
1628 | } | |
1629 | info->ExtFileAttributes = ksmbd_kstat->file_attributes; | |
1630 | ||
1631 | return info; | |
1632 | } | |
1633 | ||
af34983e HL |
1634 | int ksmbd_vfs_fill_dentry_attrs(struct ksmbd_work *work, |
1635 | struct user_namespace *user_ns, | |
1636 | struct dentry *dentry, | |
070fb21e | 1637 | struct ksmbd_kstat *ksmbd_kstat) |
f4415848 NJ |
1638 | { |
1639 | u64 time; | |
1640 | int rc; | |
1641 | ||
af34983e | 1642 | generic_fillattr(user_ns, d_inode(dentry), ksmbd_kstat->kstat); |
f4415848 NJ |
1643 | |
1644 | time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime); | |
1645 | ksmbd_kstat->create_time = time; | |
1646 | ||
1647 | /* | |
1648 | * set default value for the case that store dos attributes is not yes | |
1649 | * or that acl is disable in server's filesystem and the config is yes. | |
1650 | */ | |
1651 | if (S_ISDIR(ksmbd_kstat->kstat->mode)) | |
1652 | ksmbd_kstat->file_attributes = ATTR_DIRECTORY_LE; | |
1653 | else | |
1654 | ksmbd_kstat->file_attributes = ATTR_ARCHIVE_LE; | |
1655 | ||
1656 | if (test_share_config_flag(work->tcon->share_conf, | |
64b39f4a | 1657 | KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) { |
f4415848 NJ |
1658 | struct xattr_dos_attrib da; |
1659 | ||
af34983e | 1660 | rc = ksmbd_vfs_get_dos_attrib_xattr(user_ns, dentry, &da); |
f4415848 NJ |
1661 | if (rc > 0) { |
1662 | ksmbd_kstat->file_attributes = cpu_to_le32(da.attr); | |
1663 | ksmbd_kstat->create_time = da.create_time; | |
64b39f4a | 1664 | } else { |
f4415848 | 1665 | ksmbd_debug(VFS, "fail to load dos attribute.\n"); |
64b39f4a | 1666 | } |
f4415848 NJ |
1667 | } |
1668 | ||
1669 | return 0; | |
1670 | } | |
1671 | ||
af34983e HL |
1672 | ssize_t ksmbd_vfs_casexattr_len(struct user_namespace *user_ns, |
1673 | struct dentry *dentry, char *attr_name, | |
070fb21e | 1674 | int attr_name_len) |
f4415848 NJ |
1675 | { |
1676 | char *name, *xattr_list = NULL; | |
1677 | ssize_t value_len = -ENOENT, xattr_list_len; | |
1678 | ||
1679 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
1680 | if (xattr_list_len <= 0) | |
1681 | goto out; | |
1682 | ||
1683 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
1684 | name += strlen(name) + 1) { | |
1685 | ksmbd_debug(VFS, "%s, len %zd\n", name, strlen(name)); | |
1686 | if (strncasecmp(attr_name, name, attr_name_len)) | |
1687 | continue; | |
1688 | ||
af34983e | 1689 | value_len = ksmbd_vfs_xattr_len(user_ns, dentry, name); |
f4415848 NJ |
1690 | break; |
1691 | } | |
1692 | ||
1693 | out: | |
79f6b11a | 1694 | kvfree(xattr_list); |
f4415848 NJ |
1695 | return value_len; |
1696 | } | |
1697 | ||
64b39f4a | 1698 | int ksmbd_vfs_xattr_stream_name(char *stream_name, char **xattr_stream_name, |
070fb21e | 1699 | size_t *xattr_stream_name_size, int s_type) |
f4415848 | 1700 | { |
07781de9 | 1701 | char *type, *buf; |
f4415848 NJ |
1702 | |
1703 | if (s_type == DIR_STREAM) | |
1704 | type = ":$INDEX_ALLOCATION"; | |
1705 | else | |
1706 | type = ":$DATA"; | |
1707 | ||
07781de9 DC |
1708 | buf = kasprintf(GFP_KERNEL, "%s%s%s", |
1709 | XATTR_NAME_STREAM, stream_name, type); | |
1710 | if (!buf) | |
f4415848 NJ |
1711 | return -ENOMEM; |
1712 | ||
07781de9 DC |
1713 | *xattr_stream_name = buf; |
1714 | *xattr_stream_name_size = strlen(buf) + 1; | |
f4415848 NJ |
1715 | |
1716 | return 0; | |
1717 | } | |
1718 | ||
f4415848 | 1719 | int ksmbd_vfs_copy_file_ranges(struct ksmbd_work *work, |
070fb21e NJ |
1720 | struct ksmbd_file *src_fp, |
1721 | struct ksmbd_file *dst_fp, | |
1722 | struct srv_copychunk *chunks, | |
1723 | unsigned int chunk_count, | |
1724 | unsigned int *chunk_count_written, | |
1725 | unsigned int *chunk_size_written, | |
1726 | loff_t *total_size_written) | |
f4415848 NJ |
1727 | { |
1728 | unsigned int i; | |
1729 | loff_t src_off, dst_off, src_file_size; | |
1730 | size_t len; | |
1731 | int ret; | |
1732 | ||
1733 | *chunk_count_written = 0; | |
1734 | *chunk_size_written = 0; | |
1735 | *total_size_written = 0; | |
1736 | ||
1737 | if (!(src_fp->daccess & (FILE_READ_DATA_LE | FILE_EXECUTE_LE))) { | |
493fa2fb | 1738 | pr_err("no right to read(%pd)\n", src_fp->filp->f_path.dentry); |
f4415848 NJ |
1739 | return -EACCES; |
1740 | } | |
1741 | if (!(dst_fp->daccess & (FILE_WRITE_DATA_LE | FILE_APPEND_DATA_LE))) { | |
493fa2fb | 1742 | pr_err("no right to write(%pd)\n", dst_fp->filp->f_path.dentry); |
f4415848 NJ |
1743 | return -EACCES; |
1744 | } | |
1745 | ||
1746 | if (ksmbd_stream_fd(src_fp) || ksmbd_stream_fd(dst_fp)) | |
1747 | return -EBADF; | |
1748 | ||
1749 | smb_break_all_levII_oplock(work, dst_fp, 1); | |
1750 | ||
c36fca86 NJ |
1751 | if (!work->tcon->posix_extensions) { |
1752 | for (i = 0; i < chunk_count; i++) { | |
1753 | src_off = le64_to_cpu(chunks[i].SourceOffset); | |
1754 | dst_off = le64_to_cpu(chunks[i].TargetOffset); | |
1755 | len = le32_to_cpu(chunks[i].Length); | |
1756 | ||
1757 | if (check_lock_range(src_fp->filp, src_off, | |
64b39f4a | 1758 | src_off + len - 1, READ)) |
c36fca86 NJ |
1759 | return -EAGAIN; |
1760 | if (check_lock_range(dst_fp->filp, dst_off, | |
64b39f4a | 1761 | dst_off + len - 1, WRITE)) |
c36fca86 NJ |
1762 | return -EAGAIN; |
1763 | } | |
f4415848 NJ |
1764 | } |
1765 | ||
1766 | src_file_size = i_size_read(file_inode(src_fp->filp)); | |
1767 | ||
1768 | for (i = 0; i < chunk_count; i++) { | |
1769 | src_off = le64_to_cpu(chunks[i].SourceOffset); | |
1770 | dst_off = le64_to_cpu(chunks[i].TargetOffset); | |
1771 | len = le32_to_cpu(chunks[i].Length); | |
1772 | ||
1773 | if (src_off + len > src_file_size) | |
1774 | return -E2BIG; | |
1775 | ||
f8524776 NJ |
1776 | ret = vfs_copy_file_range(src_fp->filp, src_off, |
1777 | dst_fp->filp, dst_off, len, 0); | |
f4415848 NJ |
1778 | if (ret < 0) |
1779 | return ret; | |
1780 | ||
1781 | *chunk_count_written += 1; | |
1782 | *total_size_written += ret; | |
1783 | } | |
1784 | return 0; | |
1785 | } | |
1786 | ||
1787 | int ksmbd_vfs_posix_lock_wait(struct file_lock *flock) | |
1788 | { | |
1789 | return wait_event_interruptible(flock->fl_wait, !flock->fl_blocker); | |
1790 | } | |
1791 | ||
1792 | int ksmbd_vfs_posix_lock_wait_timeout(struct file_lock *flock, long timeout) | |
1793 | { | |
1794 | return wait_event_interruptible_timeout(flock->fl_wait, | |
1795 | !flock->fl_blocker, | |
1796 | timeout); | |
1797 | } | |
1798 | ||
1799 | void ksmbd_vfs_posix_lock_unblock(struct file_lock *flock) | |
1800 | { | |
1801 | locks_delete_block(flock); | |
1802 | } | |
1803 | ||
af34983e HL |
1804 | int ksmbd_vfs_set_init_posix_acl(struct user_namespace *user_ns, |
1805 | struct inode *inode) | |
f4415848 NJ |
1806 | { |
1807 | struct posix_acl_state acl_state; | |
1808 | struct posix_acl *acls; | |
1809 | int rc; | |
1810 | ||
1811 | ksmbd_debug(SMB, "Set posix acls\n"); | |
1812 | rc = init_acl_state(&acl_state, 1); | |
1813 | if (rc) | |
1814 | return rc; | |
1815 | ||
1816 | /* Set default owner group */ | |
1817 | acl_state.owner.allow = (inode->i_mode & 0700) >> 6; | |
1818 | acl_state.group.allow = (inode->i_mode & 0070) >> 3; | |
1819 | acl_state.other.allow = inode->i_mode & 0007; | |
1820 | acl_state.users->aces[acl_state.users->n].uid = inode->i_uid; | |
1821 | acl_state.users->aces[acl_state.users->n++].perms.allow = | |
1822 | acl_state.owner.allow; | |
1823 | acl_state.groups->aces[acl_state.groups->n].gid = inode->i_gid; | |
1824 | acl_state.groups->aces[acl_state.groups->n++].perms.allow = | |
1825 | acl_state.group.allow; | |
1826 | acl_state.mask.allow = 0x07; | |
1827 | ||
67d1c432 | 1828 | acls = posix_acl_alloc(6, GFP_KERNEL); |
f4415848 NJ |
1829 | if (!acls) { |
1830 | free_acl_state(&acl_state); | |
1831 | return -ENOMEM; | |
1832 | } | |
1833 | posix_state_to_acl(&acl_state, acls->a_entries); | |
af34983e | 1834 | rc = set_posix_acl(user_ns, inode, ACL_TYPE_ACCESS, acls); |
f4415848 NJ |
1835 | if (rc < 0) |
1836 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_ACCESS) failed, rc : %d\n", | |
070fb21e | 1837 | rc); |
f4415848 NJ |
1838 | else if (S_ISDIR(inode->i_mode)) { |
1839 | posix_state_to_acl(&acl_state, acls->a_entries); | |
af34983e | 1840 | rc = set_posix_acl(user_ns, inode, ACL_TYPE_DEFAULT, |
67d1c432 | 1841 | acls); |
f4415848 NJ |
1842 | if (rc < 0) |
1843 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_DEFAULT) failed, rc : %d\n", | |
070fb21e | 1844 | rc); |
f4415848 NJ |
1845 | } |
1846 | free_acl_state(&acl_state); | |
1847 | posix_acl_release(acls); | |
1848 | return rc; | |
1849 | } | |
1850 | ||
af34983e HL |
1851 | int ksmbd_vfs_inherit_posix_acl(struct user_namespace *user_ns, |
1852 | struct inode *inode, struct inode *parent_inode) | |
f4415848 NJ |
1853 | { |
1854 | struct posix_acl *acls; | |
1855 | struct posix_acl_entry *pace; | |
1856 | int rc, i; | |
1857 | ||
67d1c432 | 1858 | acls = get_acl(parent_inode, ACL_TYPE_DEFAULT); |
f4415848 NJ |
1859 | if (!acls) |
1860 | return -ENOENT; | |
1861 | pace = acls->a_entries; | |
1862 | ||
1863 | for (i = 0; i < acls->a_count; i++, pace++) { | |
1864 | if (pace->e_tag == ACL_MASK) { | |
1865 | pace->e_perm = 0x07; | |
1866 | break; | |
1867 | } | |
1868 | } | |
1869 | ||
af34983e | 1870 | rc = set_posix_acl(user_ns, inode, ACL_TYPE_ACCESS, acls); |
f4415848 NJ |
1871 | if (rc < 0) |
1872 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_ACCESS) failed, rc : %d\n", | |
070fb21e | 1873 | rc); |
f4415848 | 1874 | if (S_ISDIR(inode->i_mode)) { |
af34983e | 1875 | rc = set_posix_acl(user_ns, inode, ACL_TYPE_DEFAULT, |
67d1c432 | 1876 | acls); |
f4415848 NJ |
1877 | if (rc < 0) |
1878 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_DEFAULT) failed, rc : %d\n", | |
070fb21e | 1879 | rc); |
f4415848 NJ |
1880 | } |
1881 | posix_acl_release(acls); | |
1882 | return rc; | |
1883 | } |