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> | |
5970e15d | 9 | #include <linux/filelock.h> |
f4415848 NJ |
10 | #include <linux/uaccess.h> |
11 | #include <linux/backing-dev.h> | |
12 | #include <linux/writeback.h> | |
f4415848 NJ |
13 | #include <linux/xattr.h> |
14 | #include <linux/falloc.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> | |
74d7970f | 21 | #include <linux/namei.h> |
f4415848 NJ |
22 | |
23 | #include "glob.h" | |
24 | #include "oplock.h" | |
25 | #include "connection.h" | |
f4415848 NJ |
26 | #include "vfs.h" |
27 | #include "vfs_cache.h" | |
28 | #include "smbacl.h" | |
29 | #include "ndr.h" | |
30 | #include "auth.h" | |
5626518e | 31 | #include "misc.h" |
f4415848 | 32 | |
f4415848 NJ |
33 | #include "smb_common.h" |
34 | #include "mgmt/share_config.h" | |
35 | #include "mgmt/tree_connect.h" | |
36 | #include "mgmt/user_session.h" | |
37 | #include "mgmt/user_config.h" | |
38 | ||
f4415848 | 39 | static void ksmbd_vfs_inherit_owner(struct ksmbd_work *work, |
070fb21e NJ |
40 | struct inode *parent_inode, |
41 | struct inode *inode) | |
f4415848 NJ |
42 | { |
43 | if (!test_share_config_flag(work->tcon->share_conf, | |
64b39f4a | 44 | KSMBD_SHARE_FLAG_INHERIT_OWNER)) |
f4415848 NJ |
45 | return; |
46 | ||
47 | i_uid_write(inode, i_uid_read(parent_inode)); | |
48 | } | |
49 | ||
333111a6 HL |
50 | /** |
51 | * ksmbd_vfs_lock_parent() - lock parent dentry if it is stable | |
333111a6 | 52 | */ |
74d7970f | 53 | int ksmbd_vfs_lock_parent(struct dentry *parent, struct dentry *child) |
333111a6 | 54 | { |
333111a6 | 55 | inode_lock_nested(d_inode(parent), I_MUTEX_PARENT); |
74d7970f NJ |
56 | if (child->d_parent != parent) { |
57 | inode_unlock(d_inode(parent)); | |
58 | return -ENOENT; | |
333111a6 HL |
59 | } |
60 | ||
333111a6 | 61 | return 0; |
333111a6 HL |
62 | } |
63 | ||
74d7970f NJ |
64 | static int ksmbd_vfs_path_lookup_locked(struct ksmbd_share_config *share_conf, |
65 | char *pathname, unsigned int flags, | |
66 | struct path *path) | |
f4415848 | 67 | { |
74d7970f NJ |
68 | struct qstr last; |
69 | struct filename *filename; | |
70 | struct path *root_share_path = &share_conf->vfs_path; | |
71 | int err, type; | |
72 | struct path parent_path; | |
73 | struct dentry *d; | |
74 | ||
75 | if (pathname[0] == '\0') { | |
76 | pathname = share_conf->path; | |
77 | root_share_path = NULL; | |
78 | } else { | |
79 | flags |= LOOKUP_BENEATH; | |
80 | } | |
81 | ||
82 | filename = getname_kernel(pathname); | |
83 | if (IS_ERR(filename)) | |
84 | return PTR_ERR(filename); | |
85 | ||
86 | err = vfs_path_parent_lookup(filename, flags, | |
87 | &parent_path, &last, &type, | |
88 | root_share_path); | |
89 | putname(filename); | |
90 | if (err) | |
91 | return err; | |
92 | ||
93 | if (unlikely(type != LAST_NORM)) { | |
94 | path_put(&parent_path); | |
95 | return -ENOENT; | |
96 | } | |
333111a6 | 97 | |
74d7970f NJ |
98 | inode_lock_nested(parent_path.dentry->d_inode, I_MUTEX_PARENT); |
99 | d = lookup_one_qstr_excl(&last, parent_path.dentry, 0); | |
100 | if (IS_ERR(d)) | |
101 | goto err_out; | |
102 | ||
103 | if (d_is_negative(d)) { | |
104 | dput(d); | |
105 | goto err_out; | |
f4415848 | 106 | } |
6c5e36d1 | 107 | |
74d7970f NJ |
108 | path->dentry = d; |
109 | path->mnt = share_conf->vfs_path.mnt; | |
110 | path_put(&parent_path); | |
6c5e36d1 | 111 | |
74d7970f NJ |
112 | return 0; |
113 | ||
114 | err_out: | |
115 | inode_unlock(parent_path.dentry->d_inode); | |
116 | path_put(&parent_path); | |
117 | return -ENOENT; | |
f4415848 NJ |
118 | } |
119 | ||
4609e1f1 | 120 | int ksmbd_vfs_query_maximal_access(struct mnt_idmap *idmap, |
af34983e | 121 | struct dentry *dentry, __le32 *daccess) |
f4415848 | 122 | { |
ff1d5727 | 123 | int ret = 0; |
f4415848 NJ |
124 | |
125 | *daccess = cpu_to_le32(FILE_READ_ATTRIBUTES | READ_CONTROL); | |
126 | ||
4609e1f1 | 127 | if (!inode_permission(idmap, 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 | ||
4609e1f1 | 133 | if (!inode_permission(idmap, d_inode(dentry), MAY_OPEN | MAY_READ)) |
f4415848 NJ |
134 | *daccess |= FILE_READ_DATA_LE | FILE_READ_EA_LE; |
135 | ||
4609e1f1 | 136 | if (!inode_permission(idmap, d_inode(dentry), MAY_OPEN | MAY_EXEC)) |
f4415848 NJ |
137 | *daccess |= FILE_EXECUTE_LE; |
138 | ||
74d7970f | 139 | if (!inode_permission(idmap, d_inode(dentry->d_parent), MAY_EXEC | MAY_WRITE)) |
f4415848 | 140 | *daccess |= FILE_DELETE_LE; |
ff1d5727 | 141 | |
ff1d5727 | 142 | return ret; |
f4415848 NJ |
143 | } |
144 | ||
f4415848 NJ |
145 | /** |
146 | * ksmbd_vfs_create() - vfs helper for smb create file | |
147 | * @work: work | |
265fd199 | 148 | * @name: file name that is relative to share |
f4415848 NJ |
149 | * @mode: file create mode |
150 | * | |
151 | * Return: 0 on success, otherwise error | |
152 | */ | |
64b39f4a | 153 | int ksmbd_vfs_create(struct ksmbd_work *work, const char *name, umode_t mode) |
f4415848 NJ |
154 | { |
155 | struct path path; | |
156 | struct dentry *dentry; | |
157 | int err; | |
158 | ||
265fd199 HL |
159 | dentry = ksmbd_vfs_kern_path_create(work, name, |
160 | LOOKUP_NO_SYMLINKS, &path); | |
f4415848 NJ |
161 | if (IS_ERR(dentry)) { |
162 | err = PTR_ERR(dentry); | |
163 | if (err != -ENOENT) | |
bde1694a NJ |
164 | pr_err("path create failed for %s, err %d\n", |
165 | name, err); | |
f4415848 NJ |
166 | return err; |
167 | } | |
168 | ||
169 | mode |= S_IFREG; | |
abf08576 | 170 | err = vfs_create(mnt_idmap(path.mnt), d_inode(path.dentry), |
af34983e | 171 | dentry, mode, true); |
f4415848 NJ |
172 | if (!err) { |
173 | ksmbd_vfs_inherit_owner(work, d_inode(path.dentry), | |
070fb21e | 174 | d_inode(dentry)); |
f4415848 | 175 | } else { |
bde1694a | 176 | pr_err("File(%s): creation failed (err:%d)\n", name, err); |
f4415848 NJ |
177 | } |
178 | done_path_create(&path, dentry); | |
179 | return err; | |
180 | } | |
181 | ||
182 | /** | |
183 | * ksmbd_vfs_mkdir() - vfs helper for smb create directory | |
184 | * @work: work | |
265fd199 | 185 | * @name: directory name that is relative to share |
f4415848 NJ |
186 | * @mode: directory create mode |
187 | * | |
188 | * Return: 0 on success, otherwise error | |
189 | */ | |
64b39f4a | 190 | int ksmbd_vfs_mkdir(struct ksmbd_work *work, const char *name, umode_t mode) |
f4415848 | 191 | { |
abf08576 | 192 | struct mnt_idmap *idmap; |
f4415848 NJ |
193 | struct path path; |
194 | struct dentry *dentry; | |
195 | int err; | |
196 | ||
265fd199 HL |
197 | dentry = ksmbd_vfs_kern_path_create(work, name, |
198 | LOOKUP_NO_SYMLINKS | LOOKUP_DIRECTORY, | |
199 | &path); | |
f4415848 NJ |
200 | if (IS_ERR(dentry)) { |
201 | err = PTR_ERR(dentry); | |
202 | if (err != -EEXIST) | |
203 | ksmbd_debug(VFS, "path create failed for %s, err %d\n", | |
070fb21e | 204 | name, err); |
f4415848 NJ |
205 | return err; |
206 | } | |
207 | ||
abf08576 | 208 | idmap = mnt_idmap(path.mnt); |
f4415848 | 209 | mode |= S_IFDIR; |
abf08576 | 210 | err = vfs_mkdir(idmap, d_inode(path.dentry), dentry, mode); |
a2d6321b | 211 | if (err) { |
16370235 | 212 | goto out; |
a2d6321b | 213 | } else if (d_unhashed(dentry)) { |
16370235 HL |
214 | struct dentry *d; |
215 | ||
4609e1f1 | 216 | d = lookup_one(idmap, dentry->d_name.name, dentry->d_parent, |
da1e7ada | 217 | dentry->d_name.len); |
16370235 HL |
218 | if (IS_ERR(d)) { |
219 | err = PTR_ERR(d); | |
220 | goto out; | |
221 | } | |
222 | if (unlikely(d_is_negative(d))) { | |
223 | dput(d); | |
224 | err = -ENOENT; | |
225 | goto out; | |
226 | } | |
227 | ||
070fb21e | 228 | ksmbd_vfs_inherit_owner(work, d_inode(path.dentry), d_inode(d)); |
16370235 | 229 | dput(d); |
64b39f4a | 230 | } |
16370235 | 231 | out: |
f4415848 | 232 | done_path_create(&path, dentry); |
16370235 | 233 | if (err) |
bde1694a | 234 | pr_err("mkdir(%s): creation failed (err:%d)\n", name, err); |
f4415848 NJ |
235 | return err; |
236 | } | |
237 | ||
4609e1f1 | 238 | static ssize_t ksmbd_vfs_getcasexattr(struct mnt_idmap *idmap, |
af34983e | 239 | struct dentry *dentry, char *attr_name, |
070fb21e | 240 | int attr_name_len, char **attr_value) |
f4415848 NJ |
241 | { |
242 | char *name, *xattr_list = NULL; | |
243 | ssize_t value_len = -ENOENT, xattr_list_len; | |
244 | ||
245 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
246 | if (xattr_list_len <= 0) | |
247 | goto out; | |
248 | ||
249 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
250 | name += strlen(name) + 1) { | |
251 | ksmbd_debug(VFS, "%s, len %zd\n", name, strlen(name)); | |
252 | if (strncasecmp(attr_name, name, attr_name_len)) | |
253 | continue; | |
254 | ||
4609e1f1 | 255 | value_len = ksmbd_vfs_getxattr(idmap, |
af34983e | 256 | dentry, |
f4415848 NJ |
257 | name, |
258 | attr_value); | |
259 | if (value_len < 0) | |
bde1694a | 260 | pr_err("failed to get xattr in file\n"); |
f4415848 NJ |
261 | break; |
262 | } | |
263 | ||
264 | out: | |
79f6b11a | 265 | kvfree(xattr_list); |
f4415848 NJ |
266 | return value_len; |
267 | } | |
268 | ||
269 | static int ksmbd_vfs_stream_read(struct ksmbd_file *fp, char *buf, loff_t *pos, | |
070fb21e | 270 | size_t count) |
f4415848 NJ |
271 | { |
272 | ssize_t v_len; | |
273 | char *stream_buf = NULL; | |
f4415848 NJ |
274 | |
275 | ksmbd_debug(VFS, "read stream data pos : %llu, count : %zd\n", | |
070fb21e | 276 | *pos, count); |
f4415848 | 277 | |
4609e1f1 | 278 | v_len = ksmbd_vfs_getcasexattr(file_mnt_idmap(fp->filp), |
af34983e | 279 | fp->filp->f_path.dentry, |
f4415848 NJ |
280 | fp->stream.name, |
281 | fp->stream.size, | |
282 | &stream_buf); | |
fd6de099 YY |
283 | if ((int)v_len <= 0) |
284 | return (int)v_len; | |
f4415848 | 285 | |
2ae1a6cc NJ |
286 | if (v_len <= *pos) { |
287 | count = -EINVAL; | |
288 | goto free_buf; | |
289 | } | |
290 | ||
291 | if (v_len - *pos < count) | |
292 | count = v_len - *pos; | |
293 | ||
f4415848 | 294 | memcpy(buf, &stream_buf[*pos], count); |
2ae1a6cc NJ |
295 | |
296 | free_buf: | |
673b9ba7 | 297 | kvfree(stream_buf); |
2ae1a6cc | 298 | return count; |
f4415848 NJ |
299 | } |
300 | ||
301 | /** | |
302 | * check_lock_range() - vfs helper for smb byte range file locking | |
303 | * @filp: the file to apply the lock to | |
304 | * @start: lock start byte offset | |
305 | * @end: lock end byte offset | |
306 | * @type: byte range type read/write | |
307 | * | |
308 | * Return: 0 on success, otherwise error | |
309 | */ | |
64b39f4a | 310 | static int check_lock_range(struct file *filp, loff_t start, loff_t end, |
070fb21e | 311 | unsigned char type) |
f4415848 NJ |
312 | { |
313 | struct file_lock *flock; | |
87f00aba | 314 | struct file_lock_context *ctx = locks_inode_context(file_inode(filp)); |
f4415848 NJ |
315 | int error = 0; |
316 | ||
317 | if (!ctx || list_empty_careful(&ctx->flc_posix)) | |
318 | return 0; | |
319 | ||
320 | spin_lock(&ctx->flc_lock); | |
321 | list_for_each_entry(flock, &ctx->flc_posix, fl_list) { | |
322 | /* check conflict locks */ | |
323 | if (flock->fl_end >= start && end >= flock->fl_start) { | |
324 | if (flock->fl_type == F_RDLCK) { | |
325 | if (type == WRITE) { | |
bde1694a | 326 | pr_err("not allow write by shared lock\n"); |
f4415848 NJ |
327 | error = 1; |
328 | goto out; | |
329 | } | |
330 | } else if (flock->fl_type == F_WRLCK) { | |
331 | /* check owner in lock */ | |
332 | if (flock->fl_file != filp) { | |
333 | error = 1; | |
bde1694a | 334 | pr_err("not allow rw access by exclusive lock from other opens\n"); |
f4415848 NJ |
335 | goto out; |
336 | } | |
337 | } | |
338 | } | |
339 | } | |
340 | out: | |
341 | spin_unlock(&ctx->flc_lock); | |
342 | return error; | |
343 | } | |
344 | ||
345 | /** | |
346 | * ksmbd_vfs_read() - vfs helper for smb file read | |
347 | * @work: smb work | |
348 | * @fid: file id of open file | |
349 | * @count: read byte count | |
350 | * @pos: file pos | |
351 | * | |
352 | * Return: number of read bytes on success, otherwise error | |
353 | */ | |
64b39f4a | 354 | int ksmbd_vfs_read(struct ksmbd_work *work, struct ksmbd_file *fp, size_t count, |
070fb21e | 355 | loff_t *pos) |
f4415848 | 356 | { |
afa8f016 | 357 | struct file *filp = fp->filp; |
f4415848 | 358 | ssize_t nbytes = 0; |
afa8f016 NJ |
359 | char *rbuf = work->aux_payload_buf; |
360 | struct inode *inode = file_inode(filp); | |
f4415848 | 361 | |
f4415848 NJ |
362 | if (S_ISDIR(inode->i_mode)) |
363 | return -EISDIR; | |
364 | ||
365 | if (unlikely(count == 0)) | |
366 | return 0; | |
367 | ||
368 | if (work->conn->connection_type) { | |
369 | if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_EXECUTE_LE))) { | |
369c1634 | 370 | pr_err("no right to read(%pD)\n", fp->filp); |
f4415848 NJ |
371 | return -EACCES; |
372 | } | |
373 | } | |
374 | ||
375 | if (ksmbd_stream_fd(fp)) | |
376 | return ksmbd_vfs_stream_read(fp, rbuf, pos, count); | |
377 | ||
c36fca86 NJ |
378 | if (!work->tcon->posix_extensions) { |
379 | int ret; | |
380 | ||
070fb21e | 381 | ret = check_lock_range(filp, *pos, *pos + count - 1, READ); |
c36fca86 | 382 | if (ret) { |
bde1694a | 383 | pr_err("unable to read due to lock\n"); |
c36fca86 NJ |
384 | return -EAGAIN; |
385 | } | |
f4415848 NJ |
386 | } |
387 | ||
388 | nbytes = kernel_read(filp, rbuf, count, pos); | |
389 | if (nbytes < 0) { | |
50f500b7 | 390 | pr_err("smb read failed, err = %zd\n", nbytes); |
f4415848 NJ |
391 | return nbytes; |
392 | } | |
393 | ||
394 | filp->f_pos = *pos; | |
395 | return nbytes; | |
396 | } | |
397 | ||
398 | static int ksmbd_vfs_stream_write(struct ksmbd_file *fp, char *buf, loff_t *pos, | |
070fb21e | 399 | size_t count) |
f4415848 NJ |
400 | { |
401 | char *stream_buf = NULL, *wbuf; | |
4609e1f1 | 402 | struct mnt_idmap *idmap = file_mnt_idmap(fp->filp); |
f4415848 NJ |
403 | size_t size, v_len; |
404 | int err = 0; | |
405 | ||
406 | ksmbd_debug(VFS, "write stream data pos : %llu, count : %zd\n", | |
070fb21e | 407 | *pos, count); |
f4415848 NJ |
408 | |
409 | size = *pos + count; | |
410 | if (size > XATTR_SIZE_MAX) { | |
411 | size = XATTR_SIZE_MAX; | |
412 | count = (*pos + count) - XATTR_SIZE_MAX; | |
413 | } | |
414 | ||
4609e1f1 | 415 | v_len = ksmbd_vfs_getcasexattr(idmap, |
af34983e | 416 | fp->filp->f_path.dentry, |
f4415848 NJ |
417 | fp->stream.name, |
418 | fp->stream.size, | |
419 | &stream_buf); | |
fd6de099 | 420 | if ((int)v_len < 0) { |
bde1694a | 421 | pr_err("not found stream in xattr : %zd\n", v_len); |
fd6de099 | 422 | err = (int)v_len; |
f4415848 NJ |
423 | goto out; |
424 | } | |
425 | ||
426 | if (v_len < size) { | |
79f6b11a | 427 | wbuf = kvmalloc(size, GFP_KERNEL | __GFP_ZERO); |
f4415848 NJ |
428 | if (!wbuf) { |
429 | err = -ENOMEM; | |
430 | goto out; | |
431 | } | |
432 | ||
433 | if (v_len > 0) | |
434 | memcpy(wbuf, stream_buf, v_len); | |
113ef68d | 435 | kvfree(stream_buf); |
f4415848 NJ |
436 | stream_buf = wbuf; |
437 | } | |
438 | ||
439 | memcpy(&stream_buf[*pos], buf, count); | |
440 | ||
4609e1f1 | 441 | err = ksmbd_vfs_setxattr(idmap, |
af34983e | 442 | fp->filp->f_path.dentry, |
f4415848 NJ |
443 | fp->stream.name, |
444 | (void *)stream_buf, | |
445 | size, | |
446 | 0); | |
447 | if (err < 0) | |
448 | goto out; | |
449 | ||
450 | fp->filp->f_pos = *pos; | |
451 | err = 0; | |
452 | out: | |
79f6b11a | 453 | kvfree(stream_buf); |
f4415848 NJ |
454 | return err; |
455 | } | |
456 | ||
457 | /** | |
458 | * ksmbd_vfs_write() - vfs helper for smb file write | |
459 | * @work: work | |
460 | * @fid: file id of open file | |
461 | * @buf: buf containing data for writing | |
462 | * @count: read byte count | |
463 | * @pos: file pos | |
464 | * @sync: fsync after write | |
465 | * @written: number of bytes written | |
466 | * | |
467 | * Return: 0 on success, otherwise error | |
468 | */ | |
469 | int ksmbd_vfs_write(struct ksmbd_work *work, struct ksmbd_file *fp, | |
070fb21e NJ |
470 | char *buf, size_t count, loff_t *pos, bool sync, |
471 | ssize_t *written) | |
f4415848 | 472 | { |
f4415848 NJ |
473 | struct file *filp; |
474 | loff_t offset = *pos; | |
475 | int err = 0; | |
476 | ||
af7c39d9 | 477 | if (work->conn->connection_type) { |
f4415848 | 478 | if (!(fp->daccess & FILE_WRITE_DATA_LE)) { |
369c1634 | 479 | pr_err("no right to write(%pD)\n", fp->filp); |
f4415848 NJ |
480 | err = -EACCES; |
481 | goto out; | |
482 | } | |
483 | } | |
484 | ||
485 | filp = fp->filp; | |
486 | ||
487 | if (ksmbd_stream_fd(fp)) { | |
488 | err = ksmbd_vfs_stream_write(fp, buf, pos, count); | |
489 | if (!err) | |
490 | *written = count; | |
491 | goto out; | |
492 | } | |
493 | ||
c36fca86 NJ |
494 | if (!work->tcon->posix_extensions) { |
495 | err = check_lock_range(filp, *pos, *pos + count - 1, WRITE); | |
496 | if (err) { | |
bde1694a | 497 | pr_err("unable to write due to lock\n"); |
c36fca86 NJ |
498 | err = -EAGAIN; |
499 | goto out; | |
500 | } | |
f4415848 NJ |
501 | } |
502 | ||
503 | /* Do we need to break any of a levelII oplock? */ | |
504 | smb_break_all_levII_oplock(work, fp, 1); | |
505 | ||
506 | err = kernel_write(filp, buf, count, pos); | |
507 | if (err < 0) { | |
508 | ksmbd_debug(VFS, "smb write failed, err = %d\n", err); | |
509 | goto out; | |
510 | } | |
511 | ||
512 | filp->f_pos = *pos; | |
513 | *written = err; | |
514 | err = 0; | |
515 | if (sync) { | |
516 | err = vfs_fsync_range(filp, offset, offset + *written, 0); | |
517 | if (err < 0) | |
369c1634 AV |
518 | pr_err("fsync failed for filename = %pD, err = %d\n", |
519 | fp->filp, err); | |
f4415848 NJ |
520 | } |
521 | ||
522 | out: | |
523 | return err; | |
524 | } | |
525 | ||
526 | /** | |
527 | * ksmbd_vfs_getattr() - vfs helper for smb getattr | |
528 | * @work: work | |
529 | * @fid: file id of open file | |
530 | * @attrs: inode attributes | |
531 | * | |
532 | * Return: 0 on success, otherwise error | |
533 | */ | |
c22180a5 | 534 | int ksmbd_vfs_getattr(const struct path *path, struct kstat *stat) |
f4415848 NJ |
535 | { |
536 | int err; | |
537 | ||
538 | err = vfs_getattr(path, stat, STATX_BTIME, AT_STATX_SYNC_AS_STAT); | |
539 | if (err) | |
bde1694a | 540 | pr_err("getattr failed, err %d\n", err); |
f4415848 NJ |
541 | return err; |
542 | } | |
543 | ||
544 | /** | |
545 | * ksmbd_vfs_fsync() - vfs helper for smb fsync | |
546 | * @work: work | |
547 | * @fid: file id of open file | |
548 | * | |
549 | * Return: 0 on success, otherwise error | |
550 | */ | |
64b39f4a | 551 | int ksmbd_vfs_fsync(struct ksmbd_work *work, u64 fid, u64 p_id) |
f4415848 NJ |
552 | { |
553 | struct ksmbd_file *fp; | |
554 | int err; | |
555 | ||
556 | fp = ksmbd_lookup_fd_slow(work, fid, p_id); | |
557 | if (!fp) { | |
bde1694a | 558 | pr_err("failed to get filp for fid %llu\n", fid); |
f4415848 NJ |
559 | return -ENOENT; |
560 | } | |
561 | err = vfs_fsync(fp->filp, 0); | |
562 | if (err < 0) | |
bde1694a | 563 | pr_err("smb fsync failed, err = %d\n", err); |
f4415848 NJ |
564 | ksmbd_fd_put(work, fp); |
565 | return err; | |
566 | } | |
567 | ||
568 | /** | |
569 | * ksmbd_vfs_remove_file() - vfs helper for smb rmdir or unlink | |
265fd199 | 570 | * @name: directory or file name that is relative to share |
f4415848 NJ |
571 | * |
572 | * Return: 0 on success, otherwise error | |
573 | */ | |
74d7970f | 574 | int ksmbd_vfs_remove_file(struct ksmbd_work *work, const struct path *path) |
f4415848 | 575 | { |
abf08576 | 576 | struct mnt_idmap *idmap; |
74d7970f | 577 | struct dentry *parent = path->dentry->d_parent; |
3161ad3a | 578 | int err; |
f4415848 | 579 | |
f4415848 NJ |
580 | if (ksmbd_override_fsids(work)) |
581 | return -ENOMEM; | |
582 | ||
74d7970f | 583 | if (!d_inode(path->dentry)->i_nlink) { |
f4415848 NJ |
584 | err = -ENOENT; |
585 | goto out_err; | |
586 | } | |
587 | ||
74d7970f NJ |
588 | idmap = mnt_idmap(path->mnt); |
589 | if (S_ISDIR(d_inode(path->dentry)->i_mode)) { | |
590 | err = vfs_rmdir(idmap, d_inode(parent), path->dentry); | |
f4415848 | 591 | if (err && err != -ENOTEMPTY) |
74d7970f | 592 | ksmbd_debug(VFS, "rmdir failed, err %d\n", err); |
f4415848 | 593 | } else { |
74d7970f | 594 | err = vfs_unlink(idmap, d_inode(parent), path->dentry, NULL); |
f4415848 | 595 | if (err) |
74d7970f | 596 | ksmbd_debug(VFS, "unlink failed, err %d\n", err); |
f4415848 NJ |
597 | } |
598 | ||
f4415848 | 599 | out_err: |
f4415848 NJ |
600 | ksmbd_revert_fsids(work); |
601 | return err; | |
602 | } | |
603 | ||
604 | /** | |
605 | * ksmbd_vfs_link() - vfs helper for creating smb hardlink | |
606 | * @oldname: source file name | |
265fd199 | 607 | * @newname: hardlink name that is relative to share |
f4415848 NJ |
608 | * |
609 | * Return: 0 on success, otherwise error | |
610 | */ | |
64b39f4a | 611 | int ksmbd_vfs_link(struct ksmbd_work *work, const char *oldname, |
070fb21e | 612 | const char *newname) |
f4415848 NJ |
613 | { |
614 | struct path oldpath, newpath; | |
615 | struct dentry *dentry; | |
616 | int err; | |
617 | ||
618 | if (ksmbd_override_fsids(work)) | |
619 | return -ENOMEM; | |
620 | ||
4ea47798 | 621 | err = kern_path(oldname, LOOKUP_NO_SYMLINKS, &oldpath); |
f4415848 | 622 | if (err) { |
bde1694a NJ |
623 | pr_err("cannot get linux path for %s, err = %d\n", |
624 | oldname, err); | |
f4415848 NJ |
625 | goto out1; |
626 | } | |
627 | ||
265fd199 HL |
628 | dentry = ksmbd_vfs_kern_path_create(work, newname, |
629 | LOOKUP_NO_SYMLINKS | LOOKUP_REVAL, | |
630 | &newpath); | |
f4415848 NJ |
631 | if (IS_ERR(dentry)) { |
632 | err = PTR_ERR(dentry); | |
bde1694a | 633 | pr_err("path create err for %s, err %d\n", newname, err); |
f4415848 NJ |
634 | goto out2; |
635 | } | |
636 | ||
637 | err = -EXDEV; | |
638 | if (oldpath.mnt != newpath.mnt) { | |
bde1694a | 639 | pr_err("vfs_link failed err %d\n", err); |
f4415848 NJ |
640 | goto out3; |
641 | } | |
642 | ||
abf08576 | 643 | err = vfs_link(oldpath.dentry, mnt_idmap(newpath.mnt), |
af34983e | 644 | d_inode(newpath.dentry), |
070fb21e | 645 | dentry, NULL); |
f4415848 NJ |
646 | if (err) |
647 | ksmbd_debug(VFS, "vfs_link failed err %d\n", err); | |
648 | ||
649 | out3: | |
650 | done_path_create(&newpath, dentry); | |
651 | out2: | |
652 | path_put(&oldpath); | |
653 | out1: | |
654 | ksmbd_revert_fsids(work); | |
655 | return err; | |
656 | } | |
657 | ||
74d7970f NJ |
658 | int ksmbd_vfs_rename(struct ksmbd_work *work, const struct path *old_path, |
659 | char *newname, int flags) | |
4b637fc1 | 660 | { |
74d7970f NJ |
661 | struct dentry *old_parent, *new_dentry, *trap; |
662 | struct dentry *old_child = old_path->dentry; | |
663 | struct path new_path; | |
664 | struct qstr new_last; | |
665 | struct renamedata rd; | |
666 | struct filename *to; | |
667 | struct ksmbd_share_config *share_conf = work->tcon->share_conf; | |
668 | struct ksmbd_file *parent_fp; | |
669 | int new_type; | |
670 | int err, lookup_flags = LOOKUP_NO_SYMLINKS; | |
4b637fc1 | 671 | |
74d7970f NJ |
672 | if (ksmbd_override_fsids(work)) |
673 | return -ENOMEM; | |
4b637fc1 | 674 | |
74d7970f NJ |
675 | to = getname_kernel(newname); |
676 | if (IS_ERR(to)) { | |
677 | err = PTR_ERR(to); | |
678 | goto revert_fsids; | |
4b637fc1 | 679 | } |
4b637fc1 | 680 | |
74d7970f NJ |
681 | retry: |
682 | err = vfs_path_parent_lookup(to, lookup_flags | LOOKUP_BENEATH, | |
683 | &new_path, &new_last, &new_type, | |
684 | &share_conf->vfs_path); | |
685 | if (err) | |
686 | goto out1; | |
f4415848 | 687 | |
74d7970f NJ |
688 | if (old_path->mnt != new_path.mnt) { |
689 | err = -EXDEV; | |
690 | goto out2; | |
f4415848 | 691 | } |
f4415848 | 692 | |
74d7970f | 693 | trap = lock_rename_child(old_child, new_path.dentry); |
f4415848 | 694 | |
74d7970f NJ |
695 | old_parent = dget(old_child->d_parent); |
696 | if (d_unhashed(old_child)) { | |
697 | err = -EINVAL; | |
698 | goto out3; | |
f4415848 NJ |
699 | } |
700 | ||
74d7970f NJ |
701 | parent_fp = ksmbd_lookup_fd_inode(d_inode(old_child->d_parent)); |
702 | if (parent_fp) { | |
703 | if (parent_fp->daccess & FILE_DELETE_LE) { | |
704 | pr_err("parent dir is opened with delete access\n"); | |
705 | err = -ESHARE; | |
706 | ksmbd_fd_put(work, parent_fp); | |
707 | goto out3; | |
708 | } | |
709 | ksmbd_fd_put(work, parent_fp); | |
f4415848 | 710 | } |
f4415848 | 711 | |
74d7970f NJ |
712 | new_dentry = lookup_one_qstr_excl(&new_last, new_path.dentry, |
713 | lookup_flags | LOOKUP_RENAME_TARGET); | |
714 | if (IS_ERR(new_dentry)) { | |
715 | err = PTR_ERR(new_dentry); | |
716 | goto out3; | |
717 | } | |
f4415848 | 718 | |
74d7970f NJ |
719 | if (d_is_symlink(new_dentry)) { |
720 | err = -EACCES; | |
721 | goto out4; | |
265fd199 | 722 | } |
f4415848 | 723 | |
74d7970f NJ |
724 | if ((flags & RENAME_NOREPLACE) && d_is_positive(new_dentry)) { |
725 | err = -EEXIST; | |
726 | goto out4; | |
727 | } | |
f4415848 | 728 | |
74d7970f NJ |
729 | if (old_child == trap) { |
730 | err = -EINVAL; | |
731 | goto out4; | |
f4415848 | 732 | } |
74d7970f NJ |
733 | |
734 | if (new_dentry == trap) { | |
735 | err = -ENOTEMPTY; | |
736 | goto out4; | |
ff1d5727 NJ |
737 | } |
738 | ||
74d7970f NJ |
739 | rd.old_mnt_idmap = mnt_idmap(old_path->mnt), |
740 | rd.old_dir = d_inode(old_parent), | |
741 | rd.old_dentry = old_child, | |
742 | rd.new_mnt_idmap = mnt_idmap(new_path.mnt), | |
743 | rd.new_dir = new_path.dentry->d_inode, | |
744 | rd.new_dentry = new_dentry, | |
745 | rd.flags = flags, | |
746 | err = vfs_rename(&rd); | |
747 | if (err) | |
748 | ksmbd_debug(VFS, "vfs_rename failed err %d\n", err); | |
749 | ||
750 | out4: | |
751 | dput(new_dentry); | |
752 | out3: | |
753 | dput(old_parent); | |
754 | unlock_rename(old_parent, new_path.dentry); | |
755 | out2: | |
756 | path_put(&new_path); | |
757 | ||
758 | if (retry_estale(err, lookup_flags)) { | |
759 | lookup_flags |= LOOKUP_REVAL; | |
760 | goto retry; | |
ff1d5727 | 761 | } |
74d7970f NJ |
762 | out1: |
763 | putname(to); | |
764 | revert_fsids: | |
765 | ksmbd_revert_fsids(work); | |
f4415848 NJ |
766 | return err; |
767 | } | |
768 | ||
769 | /** | |
770 | * ksmbd_vfs_truncate() - vfs helper for smb file truncate | |
771 | * @work: work | |
f4415848 NJ |
772 | * @fid: file id of old file |
773 | * @size: truncate to given size | |
774 | * | |
775 | * Return: 0 on success, otherwise error | |
776 | */ | |
265fd199 | 777 | int ksmbd_vfs_truncate(struct ksmbd_work *work, |
070fb21e | 778 | struct ksmbd_file *fp, loff_t size) |
f4415848 | 779 | { |
f4415848 | 780 | int err = 0; |
265fd199 | 781 | struct file *filp; |
f4415848 | 782 | |
265fd199 | 783 | filp = fp->filp; |
f4415848 | 784 | |
265fd199 HL |
785 | /* Do we need to break any of a levelII oplock? */ |
786 | smb_break_all_levII_oplock(work, fp, 1); | |
c36fca86 | 787 | |
265fd199 HL |
788 | if (!work->tcon->posix_extensions) { |
789 | struct inode *inode = file_inode(filp); | |
790 | ||
791 | if (size < inode->i_size) { | |
792 | err = check_lock_range(filp, size, | |
793 | inode->i_size - 1, WRITE); | |
794 | } else { | |
795 | err = check_lock_range(filp, inode->i_size, | |
796 | size - 1, WRITE); | |
f4415848 NJ |
797 | } |
798 | ||
265fd199 HL |
799 | if (err) { |
800 | pr_err("failed due to lock\n"); | |
801 | return -EAGAIN; | |
802 | } | |
f4415848 NJ |
803 | } |
804 | ||
265fd199 HL |
805 | err = vfs_truncate(&filp->f_path, size); |
806 | if (err) | |
50f500b7 | 807 | pr_err("truncate failed, err %d\n", err); |
f4415848 NJ |
808 | return err; |
809 | } | |
810 | ||
811 | /** | |
812 | * ksmbd_vfs_listxattr() - vfs helper for smb list extended attributes | |
813 | * @dentry: dentry of file for listing xattrs | |
814 | * @list: destination buffer | |
815 | * @size: destination buffer length | |
816 | * | |
817 | * Return: xattr list length on success, otherwise error | |
818 | */ | |
819 | ssize_t ksmbd_vfs_listxattr(struct dentry *dentry, char **list) | |
820 | { | |
821 | ssize_t size; | |
822 | char *vlist = NULL; | |
823 | ||
824 | size = vfs_listxattr(dentry, NULL, 0); | |
825 | if (size <= 0) | |
826 | return size; | |
827 | ||
79f6b11a | 828 | vlist = kvmalloc(size, GFP_KERNEL | __GFP_ZERO); |
f4415848 NJ |
829 | if (!vlist) |
830 | return -ENOMEM; | |
831 | ||
832 | *list = vlist; | |
833 | size = vfs_listxattr(dentry, vlist, size); | |
834 | if (size < 0) { | |
835 | ksmbd_debug(VFS, "listxattr failed\n"); | |
79f6b11a | 836 | kvfree(vlist); |
f4415848 NJ |
837 | *list = NULL; |
838 | } | |
839 | ||
840 | return size; | |
841 | } | |
842 | ||
4609e1f1 | 843 | static ssize_t ksmbd_vfs_xattr_len(struct mnt_idmap *idmap, |
af34983e | 844 | struct dentry *dentry, char *xattr_name) |
f4415848 | 845 | { |
4609e1f1 | 846 | return vfs_getxattr(idmap, dentry, xattr_name, NULL, 0); |
f4415848 NJ |
847 | } |
848 | ||
849 | /** | |
850 | * ksmbd_vfs_getxattr() - vfs helper for smb get extended attributes value | |
4609e1f1 | 851 | * @idmap: idmap |
f4415848 NJ |
852 | * @dentry: dentry of file for getting xattrs |
853 | * @xattr_name: name of xattr name to query | |
854 | * @xattr_buf: destination buffer xattr value | |
855 | * | |
856 | * Return: read xattr value length on success, otherwise error | |
857 | */ | |
4609e1f1 | 858 | ssize_t ksmbd_vfs_getxattr(struct mnt_idmap *idmap, |
af34983e HL |
859 | struct dentry *dentry, |
860 | char *xattr_name, char **xattr_buf) | |
f4415848 NJ |
861 | { |
862 | ssize_t xattr_len; | |
863 | char *buf; | |
864 | ||
865 | *xattr_buf = NULL; | |
4609e1f1 | 866 | xattr_len = ksmbd_vfs_xattr_len(idmap, dentry, xattr_name); |
f4415848 NJ |
867 | if (xattr_len < 0) |
868 | return xattr_len; | |
869 | ||
870 | buf = kmalloc(xattr_len + 1, GFP_KERNEL); | |
871 | if (!buf) | |
872 | return -ENOMEM; | |
873 | ||
4609e1f1 | 874 | xattr_len = vfs_getxattr(idmap, dentry, xattr_name, |
d7e5852b | 875 | (void *)buf, xattr_len); |
f4415848 NJ |
876 | if (xattr_len > 0) |
877 | *xattr_buf = buf; | |
878 | else | |
879 | kfree(buf); | |
880 | return xattr_len; | |
881 | } | |
882 | ||
883 | /** | |
884 | * ksmbd_vfs_setxattr() - vfs helper for smb set extended attributes value | |
4609e1f1 | 885 | * @idmap: idmap of the relevant mount |
f4415848 | 886 | * @dentry: dentry to set XATTR at |
63f09a99 JC |
887 | * @attr_name: xattr name for setxattr |
888 | * @attr_value: xattr value to set | |
889 | * @attr_size: size of xattr value | |
f4415848 NJ |
890 | * @flags: destination buffer length |
891 | * | |
892 | * Return: 0 on success, otherwise error | |
893 | */ | |
4609e1f1 | 894 | int ksmbd_vfs_setxattr(struct mnt_idmap *idmap, |
af34983e | 895 | struct dentry *dentry, const char *attr_name, |
0c5fd887 | 896 | void *attr_value, size_t attr_size, int flags) |
f4415848 NJ |
897 | { |
898 | int err; | |
899 | ||
4609e1f1 | 900 | err = vfs_setxattr(idmap, |
af34983e | 901 | dentry, |
f4415848 NJ |
902 | attr_name, |
903 | attr_value, | |
904 | attr_size, | |
905 | flags); | |
906 | if (err) | |
907 | ksmbd_debug(VFS, "setxattr failed, err %d\n", err); | |
908 | return err; | |
909 | } | |
910 | ||
911 | /** | |
912 | * ksmbd_vfs_set_fadvise() - convert smb IO caching options to linux options | |
913 | * @filp: file pointer for IO | |
914 | * @options: smb IO options | |
915 | */ | |
916 | void ksmbd_vfs_set_fadvise(struct file *filp, __le32 option) | |
917 | { | |
918 | struct address_space *mapping; | |
919 | ||
920 | mapping = filp->f_mapping; | |
921 | ||
922 | if (!option || !mapping) | |
923 | return; | |
924 | ||
64b39f4a | 925 | if (option & FILE_WRITE_THROUGH_LE) { |
f4415848 | 926 | filp->f_flags |= O_SYNC; |
64b39f4a | 927 | } else if (option & FILE_SEQUENTIAL_ONLY_LE) { |
f4415848 NJ |
928 | filp->f_ra.ra_pages = inode_to_bdi(mapping->host)->ra_pages * 2; |
929 | spin_lock(&filp->f_lock); | |
930 | filp->f_mode &= ~FMODE_RANDOM; | |
931 | spin_unlock(&filp->f_lock); | |
932 | } else if (option & FILE_RANDOM_ACCESS_LE) { | |
933 | spin_lock(&filp->f_lock); | |
934 | filp->f_mode |= FMODE_RANDOM; | |
935 | spin_unlock(&filp->f_lock); | |
936 | } | |
937 | } | |
938 | ||
64b39f4a | 939 | int ksmbd_vfs_zero_data(struct ksmbd_work *work, struct ksmbd_file *fp, |
070fb21e | 940 | loff_t off, loff_t len) |
f4415848 NJ |
941 | { |
942 | smb_break_all_levII_oplock(work, fp, 1); | |
26a2787d | 943 | if (fp->f_ci->m_fattr & FILE_ATTRIBUTE_SPARSE_FILE_LE) |
f4415848 | 944 | return vfs_fallocate(fp->filp, |
070fb21e NJ |
945 | FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, |
946 | off, len); | |
f4415848 | 947 | |
18e39fb9 NJ |
948 | return vfs_fallocate(fp->filp, |
949 | FALLOC_FL_ZERO_RANGE | FALLOC_FL_KEEP_SIZE, | |
950 | off, len); | |
f4415848 NJ |
951 | } |
952 | ||
953 | int ksmbd_vfs_fqar_lseek(struct ksmbd_file *fp, loff_t start, loff_t length, | |
070fb21e | 954 | struct file_allocated_range_buffer *ranges, |
f7db8fd0 | 955 | unsigned int in_count, unsigned int *out_count) |
f4415848 NJ |
956 | { |
957 | struct file *f = fp->filp; | |
ab0b263b | 958 | struct inode *inode = file_inode(fp->filp); |
f4415848 NJ |
959 | loff_t maxbytes = (u64)inode->i_sb->s_maxbytes, end; |
960 | loff_t extent_start, extent_end; | |
961 | int ret = 0; | |
962 | ||
963 | if (start > maxbytes) | |
964 | return -EFBIG; | |
965 | ||
966 | if (!in_count) | |
967 | return 0; | |
968 | ||
969 | /* | |
970 | * Shrink request scope to what the fs can actually handle. | |
971 | */ | |
972 | if (length > maxbytes || (maxbytes - length) < start) | |
973 | length = maxbytes - start; | |
974 | ||
975 | if (start + length > inode->i_size) | |
976 | length = inode->i_size - start; | |
977 | ||
978 | *out_count = 0; | |
979 | end = start + length; | |
980 | while (start < end && *out_count < in_count) { | |
067baa9a | 981 | extent_start = vfs_llseek(f, start, SEEK_DATA); |
f4415848 NJ |
982 | if (extent_start < 0) { |
983 | if (extent_start != -ENXIO) | |
984 | ret = (int)extent_start; | |
985 | break; | |
986 | } | |
987 | ||
988 | if (extent_start >= end) | |
989 | break; | |
990 | ||
067baa9a | 991 | extent_end = vfs_llseek(f, extent_start, SEEK_HOLE); |
f4415848 NJ |
992 | if (extent_end < 0) { |
993 | if (extent_end != -ENXIO) | |
994 | ret = (int)extent_end; | |
995 | break; | |
64b39f4a | 996 | } else if (extent_start >= extent_end) { |
f4415848 | 997 | break; |
64b39f4a | 998 | } |
f4415848 NJ |
999 | |
1000 | ranges[*out_count].file_offset = cpu_to_le64(extent_start); | |
1001 | ranges[(*out_count)++].length = | |
1002 | cpu_to_le64(min(extent_end, end) - extent_start); | |
1003 | ||
1004 | start = extent_end; | |
1005 | } | |
1006 | ||
1007 | return ret; | |
1008 | } | |
1009 | ||
4609e1f1 | 1010 | int ksmbd_vfs_remove_xattr(struct mnt_idmap *idmap, |
af34983e | 1011 | struct dentry *dentry, char *attr_name) |
f4415848 | 1012 | { |
4609e1f1 | 1013 | return vfs_removexattr(idmap, dentry, attr_name); |
f4415848 NJ |
1014 | } |
1015 | ||
74d7970f | 1016 | int ksmbd_vfs_unlink(struct file *filp) |
f4415848 NJ |
1017 | { |
1018 | int err = 0; | |
74d7970f NJ |
1019 | struct dentry *dir, *dentry = filp->f_path.dentry; |
1020 | struct mnt_idmap *idmap = file_mnt_idmap(filp); | |
f4415848 | 1021 | |
74d7970f NJ |
1022 | dir = dget_parent(dentry); |
1023 | err = ksmbd_vfs_lock_parent(dir, dentry); | |
333111a6 | 1024 | if (err) |
74d7970f | 1025 | goto out; |
ff1d5727 | 1026 | dget(dentry); |
f4415848 NJ |
1027 | |
1028 | if (S_ISDIR(d_inode(dentry)->i_mode)) | |
abf08576 | 1029 | err = vfs_rmdir(idmap, d_inode(dir), dentry); |
f4415848 | 1030 | else |
abf08576 | 1031 | err = vfs_unlink(idmap, d_inode(dir), dentry, NULL); |
f4415848 | 1032 | |
f4415848 | 1033 | dput(dentry); |
ff1d5727 | 1034 | inode_unlock(d_inode(dir)); |
f4415848 NJ |
1035 | if (err) |
1036 | ksmbd_debug(VFS, "failed to delete, err %d\n", err); | |
74d7970f NJ |
1037 | out: |
1038 | dput(dir); | |
f4415848 NJ |
1039 | |
1040 | return err; | |
1041 | } | |
1042 | ||
25885a35 | 1043 | static bool __dir_empty(struct dir_context *ctx, const char *name, int namlen, |
070fb21e | 1044 | loff_t offset, u64 ino, unsigned int d_type) |
f4415848 NJ |
1045 | { |
1046 | struct ksmbd_readdir_data *buf; | |
1047 | ||
1048 | buf = container_of(ctx, struct ksmbd_readdir_data, ctx); | |
1049 | buf->dirent_count++; | |
1050 | ||
25885a35 | 1051 | return buf->dirent_count <= 2; |
f4415848 NJ |
1052 | } |
1053 | ||
1054 | /** | |
1055 | * ksmbd_vfs_empty_dir() - check for empty directory | |
1056 | * @fp: ksmbd file pointer | |
1057 | * | |
1058 | * Return: true if directory empty, otherwise false | |
1059 | */ | |
1060 | int ksmbd_vfs_empty_dir(struct ksmbd_file *fp) | |
1061 | { | |
1062 | int err; | |
1063 | struct ksmbd_readdir_data readdir_data; | |
1064 | ||
1065 | memset(&readdir_data, 0, sizeof(struct ksmbd_readdir_data)); | |
1066 | ||
1067 | set_ctx_actor(&readdir_data.ctx, __dir_empty); | |
1068 | readdir_data.dirent_count = 0; | |
1069 | ||
e8c06191 | 1070 | err = iterate_dir(fp->filp, &readdir_data.ctx); |
f4415848 NJ |
1071 | if (readdir_data.dirent_count > 2) |
1072 | err = -ENOTEMPTY; | |
1073 | else | |
1074 | err = 0; | |
1075 | return err; | |
1076 | } | |
1077 | ||
25885a35 | 1078 | static bool __caseless_lookup(struct dir_context *ctx, const char *name, |
070fb21e NJ |
1079 | int namlen, loff_t offset, u64 ino, |
1080 | unsigned int d_type) | |
f4415848 NJ |
1081 | { |
1082 | struct ksmbd_readdir_data *buf; | |
dbab80e2 | 1083 | int cmp = -EINVAL; |
f4415848 NJ |
1084 | |
1085 | buf = container_of(ctx, struct ksmbd_readdir_data, ctx); | |
1086 | ||
1087 | if (buf->used != namlen) | |
25885a35 | 1088 | return true; |
dbab80e2 AH |
1089 | if (IS_ENABLED(CONFIG_UNICODE) && buf->um) { |
1090 | const struct qstr q_buf = {.name = buf->private, | |
1091 | .len = buf->used}; | |
1092 | const struct qstr q_name = {.name = name, | |
1093 | .len = namlen}; | |
1094 | ||
1095 | cmp = utf8_strncasecmp(buf->um, &q_buf, &q_name); | |
1096 | } | |
1097 | if (cmp < 0) | |
1098 | cmp = strncasecmp((char *)buf->private, name, namlen); | |
1099 | if (!cmp) { | |
f4415848 NJ |
1100 | memcpy((char *)buf->private, name, namlen); |
1101 | buf->dirent_count = 1; | |
25885a35 | 1102 | return false; |
f4415848 | 1103 | } |
25885a35 | 1104 | return true; |
f4415848 NJ |
1105 | } |
1106 | ||
1107 | /** | |
1108 | * ksmbd_vfs_lookup_in_dir() - lookup a file in a directory | |
3c203783 HL |
1109 | * @dir: path info |
1110 | * @name: filename to lookup | |
1111 | * @namelen: filename length | |
f4415848 NJ |
1112 | * |
1113 | * Return: 0 on success, otherwise error | |
1114 | */ | |
dbab80e2 AH |
1115 | static int ksmbd_vfs_lookup_in_dir(const struct path *dir, char *name, |
1116 | size_t namelen, struct unicode_map *um) | |
f4415848 | 1117 | { |
f4415848 NJ |
1118 | int ret; |
1119 | struct file *dfilp; | |
64b39f4a | 1120 | int flags = O_RDONLY | O_LARGEFILE; |
f4415848 NJ |
1121 | struct ksmbd_readdir_data readdir_data = { |
1122 | .ctx.actor = __caseless_lookup, | |
3c203783 HL |
1123 | .private = name, |
1124 | .used = namelen, | |
1125 | .dirent_count = 0, | |
dbab80e2 | 1126 | .um = um, |
f4415848 NJ |
1127 | }; |
1128 | ||
3c203783 HL |
1129 | dfilp = dentry_open(dir, flags, current_cred()); |
1130 | if (IS_ERR(dfilp)) | |
1131 | return PTR_ERR(dfilp); | |
f4415848 | 1132 | |
e8c06191 | 1133 | ret = iterate_dir(dfilp, &readdir_data.ctx); |
f4415848 NJ |
1134 | if (readdir_data.dirent_count > 0) |
1135 | ret = 0; | |
f4415848 | 1136 | fput(dfilp); |
f4415848 NJ |
1137 | return ret; |
1138 | } | |
1139 | ||
1140 | /** | |
74d7970f | 1141 | * ksmbd_vfs_kern_path_locked() - lookup a file and get path info |
265fd199 | 1142 | * @name: file path that is relative to share |
f4415848 NJ |
1143 | * @flags: lookup flags |
1144 | * @path: if lookup succeed, return path info | |
1145 | * @caseless: caseless filename lookup | |
1146 | * | |
1147 | * Return: 0 on success, otherwise error | |
1148 | */ | |
74d7970f NJ |
1149 | int ksmbd_vfs_kern_path_locked(struct ksmbd_work *work, char *name, |
1150 | unsigned int flags, struct path *path, | |
1151 | bool caseless) | |
f4415848 | 1152 | { |
265fd199 | 1153 | struct ksmbd_share_config *share_conf = work->tcon->share_conf; |
f4415848 | 1154 | int err; |
74d7970f | 1155 | struct path parent_path; |
f4415848 | 1156 | |
74d7970f | 1157 | err = ksmbd_vfs_path_lookup_locked(share_conf, name, flags, path); |
f4415848 | 1158 | if (!err) |
74d7970f | 1159 | return err; |
f4415848 NJ |
1160 | |
1161 | if (caseless) { | |
3c203783 | 1162 | char *filepath; |
3c203783 | 1163 | size_t path_len, remain_len; |
f4415848 | 1164 | |
3c203783 HL |
1165 | filepath = kstrdup(name, GFP_KERNEL); |
1166 | if (!filepath) | |
1167 | return -ENOMEM; | |
1168 | ||
1169 | path_len = strlen(filepath); | |
265fd199 | 1170 | remain_len = path_len; |
f4415848 | 1171 | |
74d7970f NJ |
1172 | parent_path = share_conf->vfs_path; |
1173 | path_get(&parent_path); | |
f4415848 | 1174 | |
74d7970f | 1175 | while (d_can_lookup(parent_path.dentry)) { |
3c203783 HL |
1176 | char *filename = filepath + path_len - remain_len; |
1177 | char *next = strchrnul(filename, '/'); | |
1178 | size_t filename_len = next - filename; | |
1179 | bool is_last = !next[0]; | |
1180 | ||
1181 | if (filename_len == 0) | |
1182 | break; | |
1183 | ||
74d7970f | 1184 | err = ksmbd_vfs_lookup_in_dir(&parent_path, filename, |
dbab80e2 AH |
1185 | filename_len, |
1186 | work->conn->um); | |
265fd199 | 1187 | if (err) |
74d7970f | 1188 | goto out2; |
3c203783 | 1189 | |
3c203783 HL |
1190 | next[0] = '\0'; |
1191 | ||
265fd199 HL |
1192 | err = vfs_path_lookup(share_conf->vfs_path.dentry, |
1193 | share_conf->vfs_path.mnt, | |
1194 | filepath, | |
1195 | flags, | |
74d7970f | 1196 | path); |
3c203783 | 1197 | if (err) |
74d7970f NJ |
1198 | goto out2; |
1199 | else if (is_last) | |
1200 | goto out1; | |
1201 | path_put(&parent_path); | |
1202 | parent_path = *path; | |
3c203783 HL |
1203 | |
1204 | next[0] = '/'; | |
1205 | remain_len -= filename_len + 1; | |
1206 | } | |
1207 | ||
3c203783 | 1208 | err = -EINVAL; |
74d7970f NJ |
1209 | out2: |
1210 | path_put(&parent_path); | |
1211 | out1: | |
3c203783 HL |
1212 | kfree(filepath); |
1213 | } | |
74d7970f NJ |
1214 | |
1215 | if (!err) { | |
1216 | err = ksmbd_vfs_lock_parent(parent_path.dentry, path->dentry); | |
1217 | if (err) | |
1218 | dput(path->dentry); | |
1219 | path_put(&parent_path); | |
1220 | } | |
f4415848 NJ |
1221 | return err; |
1222 | } | |
1223 | ||
265fd199 HL |
1224 | struct dentry *ksmbd_vfs_kern_path_create(struct ksmbd_work *work, |
1225 | const char *name, | |
1226 | unsigned int flags, | |
1227 | struct path *path) | |
1228 | { | |
1229 | char *abs_name; | |
1230 | struct dentry *dent; | |
1231 | ||
1232 | abs_name = convert_to_unix_name(work->tcon->share_conf, name); | |
1233 | if (!abs_name) | |
1234 | return ERR_PTR(-ENOMEM); | |
1235 | ||
1236 | dent = kern_path_create(AT_FDCWD, abs_name, path, flags); | |
1237 | kfree(abs_name); | |
1238 | return dent; | |
1239 | } | |
1240 | ||
13e83a49 | 1241 | int ksmbd_vfs_remove_acl_xattrs(struct mnt_idmap *idmap, |
af34983e | 1242 | struct dentry *dentry) |
f4415848 NJ |
1243 | { |
1244 | char *name, *xattr_list = NULL; | |
1245 | ssize_t xattr_list_len; | |
1246 | int err = 0; | |
1247 | ||
1248 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
1249 | if (xattr_list_len < 0) { | |
1250 | goto out; | |
1251 | } else if (!xattr_list_len) { | |
1252 | ksmbd_debug(SMB, "empty xattr in the file\n"); | |
1253 | goto out; | |
1254 | } | |
1255 | ||
1256 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
070fb21e | 1257 | name += strlen(name) + 1) { |
f4415848 NJ |
1258 | ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name)); |
1259 | ||
1260 | if (!strncmp(name, XATTR_NAME_POSIX_ACL_ACCESS, | |
64b39f4a | 1261 | sizeof(XATTR_NAME_POSIX_ACL_ACCESS) - 1) || |
f4415848 | 1262 | !strncmp(name, XATTR_NAME_POSIX_ACL_DEFAULT, |
64b39f4a | 1263 | sizeof(XATTR_NAME_POSIX_ACL_DEFAULT) - 1)) { |
13e83a49 | 1264 | err = vfs_remove_acl(idmap, dentry, name); |
f4415848 NJ |
1265 | if (err) |
1266 | ksmbd_debug(SMB, | |
070fb21e | 1267 | "remove acl xattr failed : %s\n", name); |
f4415848 NJ |
1268 | } |
1269 | } | |
1270 | out: | |
79f6b11a | 1271 | kvfree(xattr_list); |
f4415848 NJ |
1272 | return err; |
1273 | } | |
1274 | ||
4609e1f1 | 1275 | int ksmbd_vfs_remove_sd_xattrs(struct mnt_idmap *idmap, |
af34983e | 1276 | struct dentry *dentry) |
f4415848 NJ |
1277 | { |
1278 | char *name, *xattr_list = NULL; | |
1279 | ssize_t xattr_list_len; | |
1280 | int err = 0; | |
1281 | ||
1282 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
1283 | if (xattr_list_len < 0) { | |
1284 | goto out; | |
1285 | } else if (!xattr_list_len) { | |
1286 | ksmbd_debug(SMB, "empty xattr in the file\n"); | |
1287 | goto out; | |
1288 | } | |
1289 | ||
1290 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
1291 | name += strlen(name) + 1) { | |
1292 | ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name)); | |
1293 | ||
1294 | if (!strncmp(name, XATTR_NAME_SD, XATTR_NAME_SD_LEN)) { | |
4609e1f1 | 1295 | err = ksmbd_vfs_remove_xattr(idmap, dentry, name); |
f4415848 NJ |
1296 | if (err) |
1297 | ksmbd_debug(SMB, "remove xattr failed : %s\n", name); | |
1298 | } | |
1299 | } | |
1300 | out: | |
79f6b11a | 1301 | kvfree(xattr_list); |
f4415848 NJ |
1302 | return err; |
1303 | } | |
1304 | ||
4d7ca409 | 1305 | static struct xattr_smb_acl *ksmbd_vfs_make_xattr_posix_acl(struct mnt_idmap *idmap, |
af34983e | 1306 | struct inode *inode, |
070fb21e | 1307 | int acl_type) |
f4415848 NJ |
1308 | { |
1309 | struct xattr_smb_acl *smb_acl = NULL; | |
1310 | struct posix_acl *posix_acls; | |
1311 | struct posix_acl_entry *pa_entry; | |
1312 | struct xattr_acl_entry *xa_entry; | |
1313 | int i; | |
1314 | ||
777cad16 NJ |
1315 | if (!IS_ENABLED(CONFIG_FS_POSIX_ACL)) |
1316 | return NULL; | |
1317 | ||
cac2f8b8 | 1318 | posix_acls = get_inode_acl(inode, acl_type); |
f4415848 NJ |
1319 | if (!posix_acls) |
1320 | return NULL; | |
1321 | ||
1322 | smb_acl = kzalloc(sizeof(struct xattr_smb_acl) + | |
1323 | sizeof(struct xattr_acl_entry) * posix_acls->a_count, | |
1324 | GFP_KERNEL); | |
1325 | if (!smb_acl) | |
1326 | goto out; | |
1327 | ||
1328 | smb_acl->count = posix_acls->a_count; | |
1329 | pa_entry = posix_acls->a_entries; | |
1330 | xa_entry = smb_acl->entries; | |
1331 | for (i = 0; i < posix_acls->a_count; i++, pa_entry++, xa_entry++) { | |
1332 | switch (pa_entry->e_tag) { | |
1333 | case ACL_USER: | |
1334 | xa_entry->type = SMB_ACL_USER; | |
4d7ca409 | 1335 | xa_entry->uid = posix_acl_uid_translate(idmap, pa_entry); |
f4415848 NJ |
1336 | break; |
1337 | case ACL_USER_OBJ: | |
1338 | xa_entry->type = SMB_ACL_USER_OBJ; | |
1339 | break; | |
1340 | case ACL_GROUP: | |
1341 | xa_entry->type = SMB_ACL_GROUP; | |
4d7ca409 | 1342 | xa_entry->gid = posix_acl_gid_translate(idmap, pa_entry); |
f4415848 NJ |
1343 | break; |
1344 | case ACL_GROUP_OBJ: | |
1345 | xa_entry->type = SMB_ACL_GROUP_OBJ; | |
1346 | break; | |
1347 | case ACL_OTHER: | |
1348 | xa_entry->type = SMB_ACL_OTHER; | |
1349 | break; | |
1350 | case ACL_MASK: | |
1351 | xa_entry->type = SMB_ACL_MASK; | |
1352 | break; | |
1353 | default: | |
bde1694a | 1354 | pr_err("unknown type : 0x%x\n", pa_entry->e_tag); |
f4415848 NJ |
1355 | goto out; |
1356 | } | |
1357 | ||
1358 | if (pa_entry->e_perm & ACL_READ) | |
1359 | xa_entry->perm |= SMB_ACL_READ; | |
1360 | if (pa_entry->e_perm & ACL_WRITE) | |
1361 | xa_entry->perm |= SMB_ACL_WRITE; | |
1362 | if (pa_entry->e_perm & ACL_EXECUTE) | |
1363 | xa_entry->perm |= SMB_ACL_EXECUTE; | |
1364 | } | |
1365 | out: | |
1366 | posix_acl_release(posix_acls); | |
1367 | return smb_acl; | |
1368 | } | |
1369 | ||
af34983e | 1370 | int ksmbd_vfs_set_sd_xattr(struct ksmbd_conn *conn, |
4609e1f1 | 1371 | struct mnt_idmap *idmap, |
af34983e | 1372 | struct dentry *dentry, |
070fb21e | 1373 | struct smb_ntsd *pntsd, int len) |
f4415848 NJ |
1374 | { |
1375 | int rc; | |
1376 | struct ndr sd_ndr = {0}, acl_ndr = {0}; | |
1377 | struct xattr_ntacl acl = {0}; | |
1378 | struct xattr_smb_acl *smb_acl, *def_smb_acl = NULL; | |
fba08fa0 | 1379 | struct inode *inode = d_inode(dentry); |
f4415848 NJ |
1380 | |
1381 | acl.version = 4; | |
1382 | acl.hash_type = XATTR_SD_HASH_TYPE_SHA256; | |
fba08fa0 | 1383 | acl.current_time = ksmbd_UnixTimeToNT(current_time(inode)); |
f4415848 NJ |
1384 | |
1385 | memcpy(acl.desc, "posix_acl", 9); | |
1386 | acl.desc_len = 10; | |
1387 | ||
1388 | pntsd->osidoffset = | |
1389 | cpu_to_le32(le32_to_cpu(pntsd->osidoffset) + NDR_NTSD_OFFSETOF); | |
1390 | pntsd->gsidoffset = | |
1391 | cpu_to_le32(le32_to_cpu(pntsd->gsidoffset) + NDR_NTSD_OFFSETOF); | |
1392 | pntsd->dacloffset = | |
1393 | cpu_to_le32(le32_to_cpu(pntsd->dacloffset) + NDR_NTSD_OFFSETOF); | |
1394 | ||
1395 | acl.sd_buf = (char *)pntsd; | |
1396 | acl.sd_size = len; | |
1397 | ||
1398 | rc = ksmbd_gen_sd_hash(conn, acl.sd_buf, acl.sd_size, acl.hash); | |
1399 | if (rc) { | |
bde1694a | 1400 | pr_err("failed to generate hash for ndr acl\n"); |
f4415848 NJ |
1401 | return rc; |
1402 | } | |
1403 | ||
4d7ca409 | 1404 | smb_acl = ksmbd_vfs_make_xattr_posix_acl(idmap, inode, |
af34983e | 1405 | ACL_TYPE_ACCESS); |
f4415848 | 1406 | if (S_ISDIR(inode->i_mode)) |
4d7ca409 | 1407 | def_smb_acl = ksmbd_vfs_make_xattr_posix_acl(idmap, inode, |
070fb21e | 1408 | ACL_TYPE_DEFAULT); |
f4415848 | 1409 | |
e67fe633 | 1410 | rc = ndr_encode_posix_acl(&acl_ndr, idmap, inode, |
af34983e | 1411 | smb_acl, def_smb_acl); |
f4415848 | 1412 | if (rc) { |
bde1694a | 1413 | pr_err("failed to encode ndr to posix acl\n"); |
f4415848 NJ |
1414 | goto out; |
1415 | } | |
1416 | ||
1417 | rc = ksmbd_gen_sd_hash(conn, acl_ndr.data, acl_ndr.offset, | |
070fb21e | 1418 | acl.posix_acl_hash); |
f4415848 | 1419 | if (rc) { |
bde1694a | 1420 | pr_err("failed to generate hash for ndr acl\n"); |
f4415848 NJ |
1421 | goto out; |
1422 | } | |
1423 | ||
1424 | rc = ndr_encode_v4_ntacl(&sd_ndr, &acl); | |
1425 | if (rc) { | |
bde1694a | 1426 | pr_err("failed to encode ndr to posix acl\n"); |
f4415848 NJ |
1427 | goto out; |
1428 | } | |
1429 | ||
4609e1f1 | 1430 | rc = ksmbd_vfs_setxattr(idmap, dentry, |
af34983e | 1431 | XATTR_NAME_SD, sd_ndr.data, |
070fb21e | 1432 | sd_ndr.offset, 0); |
f4415848 | 1433 | if (rc < 0) |
bde1694a | 1434 | pr_err("Failed to store XATTR ntacl :%d\n", rc); |
f4415848 NJ |
1435 | |
1436 | kfree(sd_ndr.data); | |
1437 | out: | |
1438 | kfree(acl_ndr.data); | |
1439 | kfree(smb_acl); | |
1440 | kfree(def_smb_acl); | |
1441 | return rc; | |
1442 | } | |
1443 | ||
af34983e | 1444 | int ksmbd_vfs_get_sd_xattr(struct ksmbd_conn *conn, |
4609e1f1 | 1445 | struct mnt_idmap *idmap, |
af34983e | 1446 | struct dentry *dentry, |
070fb21e | 1447 | struct smb_ntsd **pntsd) |
f4415848 NJ |
1448 | { |
1449 | int rc; | |
1450 | struct ndr n; | |
78ad2c27 NJ |
1451 | struct inode *inode = d_inode(dentry); |
1452 | struct ndr acl_ndr = {0}; | |
1453 | struct xattr_ntacl acl; | |
1454 | struct xattr_smb_acl *smb_acl = NULL, *def_smb_acl = NULL; | |
1455 | __u8 cmp_hash[XATTR_SD_HASH_SIZE] = {0}; | |
f4415848 | 1456 | |
4609e1f1 | 1457 | rc = ksmbd_vfs_getxattr(idmap, dentry, XATTR_NAME_SD, &n.data); |
78ad2c27 NJ |
1458 | if (rc <= 0) |
1459 | return rc; | |
f4415848 | 1460 | |
78ad2c27 NJ |
1461 | n.length = rc; |
1462 | rc = ndr_decode_v4_ntacl(&n, &acl); | |
1463 | if (rc) | |
1464 | goto free_n_data; | |
f4415848 | 1465 | |
4d7ca409 | 1466 | smb_acl = ksmbd_vfs_make_xattr_posix_acl(idmap, inode, |
78ad2c27 NJ |
1467 | ACL_TYPE_ACCESS); |
1468 | if (S_ISDIR(inode->i_mode)) | |
4d7ca409 | 1469 | def_smb_acl = ksmbd_vfs_make_xattr_posix_acl(idmap, inode, |
78ad2c27 | 1470 | ACL_TYPE_DEFAULT); |
f4415848 | 1471 | |
e67fe633 | 1472 | rc = ndr_encode_posix_acl(&acl_ndr, idmap, inode, smb_acl, |
78ad2c27 NJ |
1473 | def_smb_acl); |
1474 | if (rc) { | |
1475 | pr_err("failed to encode ndr to posix acl\n"); | |
1476 | goto out_free; | |
1477 | } | |
f4415848 | 1478 | |
78ad2c27 NJ |
1479 | rc = ksmbd_gen_sd_hash(conn, acl_ndr.data, acl_ndr.offset, cmp_hash); |
1480 | if (rc) { | |
1481 | pr_err("failed to generate hash for ndr acl\n"); | |
1482 | goto out_free; | |
1483 | } | |
1484 | ||
1485 | if (memcmp(cmp_hash, acl.posix_acl_hash, XATTR_SD_HASH_SIZE)) { | |
1486 | pr_err("hash value diff\n"); | |
1487 | rc = -EINVAL; | |
1488 | goto out_free; | |
1489 | } | |
1490 | ||
1491 | *pntsd = acl.sd_buf; | |
8f054118 NJ |
1492 | if (acl.sd_size < sizeof(struct smb_ntsd)) { |
1493 | pr_err("sd size is invalid\n"); | |
1494 | goto out_free; | |
1495 | } | |
1496 | ||
78ad2c27 NJ |
1497 | (*pntsd)->osidoffset = cpu_to_le32(le32_to_cpu((*pntsd)->osidoffset) - |
1498 | NDR_NTSD_OFFSETOF); | |
1499 | (*pntsd)->gsidoffset = cpu_to_le32(le32_to_cpu((*pntsd)->gsidoffset) - | |
1500 | NDR_NTSD_OFFSETOF); | |
1501 | (*pntsd)->dacloffset = cpu_to_le32(le32_to_cpu((*pntsd)->dacloffset) - | |
1502 | NDR_NTSD_OFFSETOF); | |
1503 | ||
1504 | rc = acl.sd_size; | |
1505 | out_free: | |
1506 | kfree(acl_ndr.data); | |
1507 | kfree(smb_acl); | |
1508 | kfree(def_smb_acl); | |
1509 | if (rc < 0) { | |
1510 | kfree(acl.sd_buf); | |
1511 | *pntsd = NULL; | |
f4415848 NJ |
1512 | } |
1513 | ||
78ad2c27 NJ |
1514 | free_n_data: |
1515 | kfree(n.data); | |
f4415848 NJ |
1516 | return rc; |
1517 | } | |
1518 | ||
4609e1f1 | 1519 | int ksmbd_vfs_set_dos_attrib_xattr(struct mnt_idmap *idmap, |
af34983e | 1520 | struct dentry *dentry, |
070fb21e | 1521 | struct xattr_dos_attrib *da) |
f4415848 NJ |
1522 | { |
1523 | struct ndr n; | |
1524 | int err; | |
1525 | ||
1526 | err = ndr_encode_dos_attr(&n, da); | |
1527 | if (err) | |
1528 | return err; | |
1529 | ||
4609e1f1 | 1530 | err = ksmbd_vfs_setxattr(idmap, dentry, XATTR_NAME_DOS_ATTRIBUTE, |
070fb21e | 1531 | (void *)n.data, n.offset, 0); |
f4415848 NJ |
1532 | if (err) |
1533 | ksmbd_debug(SMB, "failed to store dos attribute in xattr\n"); | |
1534 | kfree(n.data); | |
1535 | ||
1536 | return err; | |
1537 | } | |
1538 | ||
4609e1f1 | 1539 | int ksmbd_vfs_get_dos_attrib_xattr(struct mnt_idmap *idmap, |
af34983e | 1540 | struct dentry *dentry, |
070fb21e | 1541 | struct xattr_dos_attrib *da) |
f4415848 NJ |
1542 | { |
1543 | struct ndr n; | |
1544 | int err; | |
1545 | ||
4609e1f1 | 1546 | err = ksmbd_vfs_getxattr(idmap, dentry, XATTR_NAME_DOS_ATTRIBUTE, |
070fb21e | 1547 | (char **)&n.data); |
f4415848 NJ |
1548 | if (err > 0) { |
1549 | n.length = err; | |
1550 | if (ndr_decode_dos_attr(&n, da)) | |
1551 | err = -EINVAL; | |
79f6b11a | 1552 | kfree(n.data); |
64b39f4a | 1553 | } else { |
f4415848 | 1554 | ksmbd_debug(SMB, "failed to load dos attribute in xattr\n"); |
64b39f4a | 1555 | } |
f4415848 NJ |
1556 | |
1557 | return err; | |
1558 | } | |
1559 | ||
f4415848 NJ |
1560 | /** |
1561 | * ksmbd_vfs_init_kstat() - convert unix stat information to smb stat format | |
1562 | * @p: destination buffer | |
1563 | * @ksmbd_kstat: ksmbd kstat wrapper | |
1564 | */ | |
1565 | void *ksmbd_vfs_init_kstat(char **p, struct ksmbd_kstat *ksmbd_kstat) | |
1566 | { | |
1567 | struct file_directory_info *info = (struct file_directory_info *)(*p); | |
1568 | struct kstat *kstat = ksmbd_kstat->kstat; | |
1569 | u64 time; | |
1570 | ||
1571 | info->FileIndex = 0; | |
1572 | info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time); | |
1573 | time = ksmbd_UnixTimeToNT(kstat->atime); | |
1574 | info->LastAccessTime = cpu_to_le64(time); | |
1575 | time = ksmbd_UnixTimeToNT(kstat->mtime); | |
1576 | info->LastWriteTime = cpu_to_le64(time); | |
1577 | time = ksmbd_UnixTimeToNT(kstat->ctime); | |
1578 | info->ChangeTime = cpu_to_le64(time); | |
1579 | ||
26a2787d | 1580 | if (ksmbd_kstat->file_attributes & FILE_ATTRIBUTE_DIRECTORY_LE) { |
f4415848 NJ |
1581 | info->EndOfFile = 0; |
1582 | info->AllocationSize = 0; | |
1583 | } else { | |
1584 | info->EndOfFile = cpu_to_le64(kstat->size); | |
1585 | info->AllocationSize = cpu_to_le64(kstat->blocks << 9); | |
1586 | } | |
1587 | info->ExtFileAttributes = ksmbd_kstat->file_attributes; | |
1588 | ||
1589 | return info; | |
1590 | } | |
1591 | ||
af34983e | 1592 | int ksmbd_vfs_fill_dentry_attrs(struct ksmbd_work *work, |
b74d24f7 | 1593 | struct mnt_idmap *idmap, |
af34983e | 1594 | struct dentry *dentry, |
070fb21e | 1595 | struct ksmbd_kstat *ksmbd_kstat) |
f4415848 NJ |
1596 | { |
1597 | u64 time; | |
1598 | int rc; | |
1599 | ||
b74d24f7 | 1600 | generic_fillattr(idmap, d_inode(dentry), ksmbd_kstat->kstat); |
f4415848 NJ |
1601 | |
1602 | time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime); | |
1603 | ksmbd_kstat->create_time = time; | |
1604 | ||
1605 | /* | |
1606 | * set default value for the case that store dos attributes is not yes | |
1607 | * or that acl is disable in server's filesystem and the config is yes. | |
1608 | */ | |
1609 | if (S_ISDIR(ksmbd_kstat->kstat->mode)) | |
26a2787d | 1610 | ksmbd_kstat->file_attributes = FILE_ATTRIBUTE_DIRECTORY_LE; |
f4415848 | 1611 | else |
26a2787d | 1612 | ksmbd_kstat->file_attributes = FILE_ATTRIBUTE_ARCHIVE_LE; |
f4415848 NJ |
1613 | |
1614 | if (test_share_config_flag(work->tcon->share_conf, | |
64b39f4a | 1615 | KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) { |
f4415848 NJ |
1616 | struct xattr_dos_attrib da; |
1617 | ||
4609e1f1 | 1618 | rc = ksmbd_vfs_get_dos_attrib_xattr(idmap, dentry, &da); |
f4415848 NJ |
1619 | if (rc > 0) { |
1620 | ksmbd_kstat->file_attributes = cpu_to_le32(da.attr); | |
1621 | ksmbd_kstat->create_time = da.create_time; | |
64b39f4a | 1622 | } else { |
f4415848 | 1623 | ksmbd_debug(VFS, "fail to load dos attribute.\n"); |
64b39f4a | 1624 | } |
f4415848 NJ |
1625 | } |
1626 | ||
1627 | return 0; | |
1628 | } | |
1629 | ||
4609e1f1 | 1630 | ssize_t ksmbd_vfs_casexattr_len(struct mnt_idmap *idmap, |
af34983e | 1631 | struct dentry *dentry, char *attr_name, |
070fb21e | 1632 | int attr_name_len) |
f4415848 NJ |
1633 | { |
1634 | char *name, *xattr_list = NULL; | |
1635 | ssize_t value_len = -ENOENT, xattr_list_len; | |
1636 | ||
1637 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
1638 | if (xattr_list_len <= 0) | |
1639 | goto out; | |
1640 | ||
1641 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
1642 | name += strlen(name) + 1) { | |
1643 | ksmbd_debug(VFS, "%s, len %zd\n", name, strlen(name)); | |
1644 | if (strncasecmp(attr_name, name, attr_name_len)) | |
1645 | continue; | |
1646 | ||
4609e1f1 | 1647 | value_len = ksmbd_vfs_xattr_len(idmap, dentry, name); |
f4415848 NJ |
1648 | break; |
1649 | } | |
1650 | ||
1651 | out: | |
79f6b11a | 1652 | kvfree(xattr_list); |
f4415848 NJ |
1653 | return value_len; |
1654 | } | |
1655 | ||
64b39f4a | 1656 | int ksmbd_vfs_xattr_stream_name(char *stream_name, char **xattr_stream_name, |
070fb21e | 1657 | size_t *xattr_stream_name_size, int s_type) |
f4415848 | 1658 | { |
07781de9 | 1659 | char *type, *buf; |
f4415848 NJ |
1660 | |
1661 | if (s_type == DIR_STREAM) | |
1662 | type = ":$INDEX_ALLOCATION"; | |
1663 | else | |
1664 | type = ":$DATA"; | |
1665 | ||
07781de9 DC |
1666 | buf = kasprintf(GFP_KERNEL, "%s%s%s", |
1667 | XATTR_NAME_STREAM, stream_name, type); | |
1668 | if (!buf) | |
f4415848 NJ |
1669 | return -ENOMEM; |
1670 | ||
07781de9 DC |
1671 | *xattr_stream_name = buf; |
1672 | *xattr_stream_name_size = strlen(buf) + 1; | |
f4415848 NJ |
1673 | |
1674 | return 0; | |
1675 | } | |
1676 | ||
f4415848 | 1677 | int ksmbd_vfs_copy_file_ranges(struct ksmbd_work *work, |
070fb21e NJ |
1678 | struct ksmbd_file *src_fp, |
1679 | struct ksmbd_file *dst_fp, | |
1680 | struct srv_copychunk *chunks, | |
1681 | unsigned int chunk_count, | |
1682 | unsigned int *chunk_count_written, | |
1683 | unsigned int *chunk_size_written, | |
1684 | loff_t *total_size_written) | |
f4415848 NJ |
1685 | { |
1686 | unsigned int i; | |
1687 | loff_t src_off, dst_off, src_file_size; | |
1688 | size_t len; | |
1689 | int ret; | |
1690 | ||
1691 | *chunk_count_written = 0; | |
1692 | *chunk_size_written = 0; | |
1693 | *total_size_written = 0; | |
1694 | ||
1695 | if (!(src_fp->daccess & (FILE_READ_DATA_LE | FILE_EXECUTE_LE))) { | |
369c1634 | 1696 | pr_err("no right to read(%pD)\n", src_fp->filp); |
f4415848 NJ |
1697 | return -EACCES; |
1698 | } | |
1699 | if (!(dst_fp->daccess & (FILE_WRITE_DATA_LE | FILE_APPEND_DATA_LE))) { | |
369c1634 | 1700 | pr_err("no right to write(%pD)\n", dst_fp->filp); |
f4415848 NJ |
1701 | return -EACCES; |
1702 | } | |
1703 | ||
1704 | if (ksmbd_stream_fd(src_fp) || ksmbd_stream_fd(dst_fp)) | |
1705 | return -EBADF; | |
1706 | ||
1707 | smb_break_all_levII_oplock(work, dst_fp, 1); | |
1708 | ||
c36fca86 NJ |
1709 | if (!work->tcon->posix_extensions) { |
1710 | for (i = 0; i < chunk_count; i++) { | |
1711 | src_off = le64_to_cpu(chunks[i].SourceOffset); | |
1712 | dst_off = le64_to_cpu(chunks[i].TargetOffset); | |
1713 | len = le32_to_cpu(chunks[i].Length); | |
1714 | ||
1715 | if (check_lock_range(src_fp->filp, src_off, | |
64b39f4a | 1716 | src_off + len - 1, READ)) |
c36fca86 NJ |
1717 | return -EAGAIN; |
1718 | if (check_lock_range(dst_fp->filp, dst_off, | |
64b39f4a | 1719 | dst_off + len - 1, WRITE)) |
c36fca86 NJ |
1720 | return -EAGAIN; |
1721 | } | |
f4415848 NJ |
1722 | } |
1723 | ||
1724 | src_file_size = i_size_read(file_inode(src_fp->filp)); | |
1725 | ||
1726 | for (i = 0; i < chunk_count; i++) { | |
1727 | src_off = le64_to_cpu(chunks[i].SourceOffset); | |
1728 | dst_off = le64_to_cpu(chunks[i].TargetOffset); | |
1729 | len = le32_to_cpu(chunks[i].Length); | |
1730 | ||
1731 | if (src_off + len > src_file_size) | |
1732 | return -E2BIG; | |
1733 | ||
f8524776 NJ |
1734 | ret = vfs_copy_file_range(src_fp->filp, src_off, |
1735 | dst_fp->filp, dst_off, len, 0); | |
868f9f2f | 1736 | if (ret == -EOPNOTSUPP || ret == -EXDEV) |
10bc8e4a AG |
1737 | ret = vfs_copy_file_range(src_fp->filp, src_off, |
1738 | dst_fp->filp, dst_off, len, | |
1739 | COPY_FILE_SPLICE); | |
f4415848 NJ |
1740 | if (ret < 0) |
1741 | return ret; | |
1742 | ||
1743 | *chunk_count_written += 1; | |
1744 | *total_size_written += ret; | |
1745 | } | |
1746 | return 0; | |
1747 | } | |
1748 | ||
45a64e8b | 1749 | void ksmbd_vfs_posix_lock_wait(struct file_lock *flock) |
f4415848 | 1750 | { |
45a64e8b | 1751 | wait_event(flock->fl_wait, !flock->fl_blocker); |
f4415848 NJ |
1752 | } |
1753 | ||
1754 | int ksmbd_vfs_posix_lock_wait_timeout(struct file_lock *flock, long timeout) | |
1755 | { | |
1756 | return wait_event_interruptible_timeout(flock->fl_wait, | |
1757 | !flock->fl_blocker, | |
1758 | timeout); | |
1759 | } | |
1760 | ||
1761 | void ksmbd_vfs_posix_lock_unblock(struct file_lock *flock) | |
1762 | { | |
1763 | locks_delete_block(flock); | |
1764 | } | |
1765 | ||
13e83a49 | 1766 | int ksmbd_vfs_set_init_posix_acl(struct mnt_idmap *idmap, |
138060ba | 1767 | struct dentry *dentry) |
f4415848 NJ |
1768 | { |
1769 | struct posix_acl_state acl_state; | |
1770 | struct posix_acl *acls; | |
138060ba | 1771 | struct inode *inode = d_inode(dentry); |
f4415848 NJ |
1772 | int rc; |
1773 | ||
777cad16 NJ |
1774 | if (!IS_ENABLED(CONFIG_FS_POSIX_ACL)) |
1775 | return -EOPNOTSUPP; | |
1776 | ||
f4415848 NJ |
1777 | ksmbd_debug(SMB, "Set posix acls\n"); |
1778 | rc = init_acl_state(&acl_state, 1); | |
1779 | if (rc) | |
1780 | return rc; | |
1781 | ||
1782 | /* Set default owner group */ | |
1783 | acl_state.owner.allow = (inode->i_mode & 0700) >> 6; | |
1784 | acl_state.group.allow = (inode->i_mode & 0070) >> 3; | |
1785 | acl_state.other.allow = inode->i_mode & 0007; | |
1786 | acl_state.users->aces[acl_state.users->n].uid = inode->i_uid; | |
1787 | acl_state.users->aces[acl_state.users->n++].perms.allow = | |
1788 | acl_state.owner.allow; | |
1789 | acl_state.groups->aces[acl_state.groups->n].gid = inode->i_gid; | |
1790 | acl_state.groups->aces[acl_state.groups->n++].perms.allow = | |
1791 | acl_state.group.allow; | |
1792 | acl_state.mask.allow = 0x07; | |
1793 | ||
67d1c432 | 1794 | acls = posix_acl_alloc(6, GFP_KERNEL); |
f4415848 NJ |
1795 | if (!acls) { |
1796 | free_acl_state(&acl_state); | |
1797 | return -ENOMEM; | |
1798 | } | |
1799 | posix_state_to_acl(&acl_state, acls->a_entries); | |
13e83a49 | 1800 | rc = set_posix_acl(idmap, dentry, ACL_TYPE_ACCESS, acls); |
f4415848 NJ |
1801 | if (rc < 0) |
1802 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_ACCESS) failed, rc : %d\n", | |
070fb21e | 1803 | rc); |
f4415848 NJ |
1804 | else if (S_ISDIR(inode->i_mode)) { |
1805 | posix_state_to_acl(&acl_state, acls->a_entries); | |
13e83a49 | 1806 | rc = set_posix_acl(idmap, dentry, ACL_TYPE_DEFAULT, acls); |
f4415848 NJ |
1807 | if (rc < 0) |
1808 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_DEFAULT) failed, rc : %d\n", | |
070fb21e | 1809 | rc); |
f4415848 NJ |
1810 | } |
1811 | free_acl_state(&acl_state); | |
1812 | posix_acl_release(acls); | |
1813 | return rc; | |
1814 | } | |
1815 | ||
13e83a49 | 1816 | int ksmbd_vfs_inherit_posix_acl(struct mnt_idmap *idmap, |
138060ba | 1817 | struct dentry *dentry, struct inode *parent_inode) |
f4415848 NJ |
1818 | { |
1819 | struct posix_acl *acls; | |
1820 | struct posix_acl_entry *pace; | |
138060ba | 1821 | struct inode *inode = d_inode(dentry); |
f4415848 NJ |
1822 | int rc, i; |
1823 | ||
777cad16 NJ |
1824 | if (!IS_ENABLED(CONFIG_FS_POSIX_ACL)) |
1825 | return -EOPNOTSUPP; | |
1826 | ||
cac2f8b8 | 1827 | acls = get_inode_acl(parent_inode, ACL_TYPE_DEFAULT); |
f4415848 NJ |
1828 | if (!acls) |
1829 | return -ENOENT; | |
1830 | pace = acls->a_entries; | |
1831 | ||
1832 | for (i = 0; i < acls->a_count; i++, pace++) { | |
1833 | if (pace->e_tag == ACL_MASK) { | |
1834 | pace->e_perm = 0x07; | |
1835 | break; | |
1836 | } | |
1837 | } | |
1838 | ||
13e83a49 | 1839 | rc = set_posix_acl(idmap, dentry, ACL_TYPE_ACCESS, acls); |
f4415848 NJ |
1840 | if (rc < 0) |
1841 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_ACCESS) failed, rc : %d\n", | |
070fb21e | 1842 | rc); |
f4415848 | 1843 | if (S_ISDIR(inode->i_mode)) { |
13e83a49 | 1844 | rc = set_posix_acl(idmap, dentry, ACL_TYPE_DEFAULT, |
67d1c432 | 1845 | acls); |
f4415848 NJ |
1846 | if (rc < 0) |
1847 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_DEFAULT) failed, rc : %d\n", | |
070fb21e | 1848 | rc); |
f4415848 NJ |
1849 | } |
1850 | posix_acl_release(acls); | |
1851 | return rc; | |
1852 | } |