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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 | ||
265fd199 HL |
22 | #include "../internal.h" /* for vfs_path_lookup */ |
23 | ||
f4415848 NJ |
24 | #include "glob.h" |
25 | #include "oplock.h" | |
26 | #include "connection.h" | |
f4415848 NJ |
27 | #include "vfs.h" |
28 | #include "vfs_cache.h" | |
29 | #include "smbacl.h" | |
30 | #include "ndr.h" | |
31 | #include "auth.h" | |
5626518e | 32 | #include "misc.h" |
f4415848 | 33 | |
f4415848 NJ |
34 | #include "smb_common.h" |
35 | #include "mgmt/share_config.h" | |
36 | #include "mgmt/tree_connect.h" | |
37 | #include "mgmt/user_session.h" | |
38 | #include "mgmt/user_config.h" | |
39 | ||
40 | static char *extract_last_component(char *path) | |
41 | { | |
42 | char *p = strrchr(path, '/'); | |
43 | ||
44 | if (p && p[1] != '\0') { | |
45 | *p = '\0'; | |
46 | p++; | |
47 | } else { | |
48 | p = NULL; | |
f4415848 NJ |
49 | } |
50 | return p; | |
51 | } | |
52 | ||
f4415848 | 53 | static void ksmbd_vfs_inherit_owner(struct ksmbd_work *work, |
070fb21e NJ |
54 | struct inode *parent_inode, |
55 | struct inode *inode) | |
f4415848 NJ |
56 | { |
57 | if (!test_share_config_flag(work->tcon->share_conf, | |
64b39f4a | 58 | KSMBD_SHARE_FLAG_INHERIT_OWNER)) |
f4415848 NJ |
59 | return; |
60 | ||
61 | i_uid_write(inode, i_uid_read(parent_inode)); | |
62 | } | |
63 | ||
333111a6 HL |
64 | /** |
65 | * ksmbd_vfs_lock_parent() - lock parent dentry if it is stable | |
66 | * | |
67 | * the parent dentry got by dget_parent or @parent could be | |
68 | * unstable, we try to lock a parent inode and lookup the | |
69 | * child dentry again. | |
70 | * | |
71 | * the reference count of @parent isn't incremented. | |
72 | */ | |
da1e7ada CB |
73 | int ksmbd_vfs_lock_parent(struct user_namespace *user_ns, struct dentry *parent, |
74 | struct dentry *child) | |
333111a6 HL |
75 | { |
76 | struct dentry *dentry; | |
77 | int ret = 0; | |
78 | ||
79 | inode_lock_nested(d_inode(parent), I_MUTEX_PARENT); | |
da1e7ada CB |
80 | dentry = lookup_one(user_ns, child->d_name.name, parent, |
81 | child->d_name.len); | |
333111a6 HL |
82 | if (IS_ERR(dentry)) { |
83 | ret = PTR_ERR(dentry); | |
84 | goto out_err; | |
85 | } | |
86 | ||
87 | if (dentry != child) { | |
88 | ret = -ESTALE; | |
89 | dput(dentry); | |
90 | goto out_err; | |
91 | } | |
92 | ||
93 | dput(dentry); | |
94 | return 0; | |
95 | out_err: | |
96 | inode_unlock(d_inode(parent)); | |
97 | return ret; | |
98 | } | |
99 | ||
af34983e HL |
100 | int ksmbd_vfs_may_delete(struct user_namespace *user_ns, |
101 | struct dentry *dentry) | |
f4415848 | 102 | { |
6c5e36d1 HL |
103 | struct dentry *parent; |
104 | int ret; | |
333111a6 | 105 | |
6c5e36d1 | 106 | parent = dget_parent(dentry); |
da1e7ada | 107 | ret = ksmbd_vfs_lock_parent(user_ns, parent, dentry); |
6c5e36d1 | 108 | if (ret) { |
f4415848 | 109 | dput(parent); |
6c5e36d1 | 110 | return ret; |
f4415848 | 111 | } |
6c5e36d1 | 112 | |
af34983e | 113 | ret = inode_permission(user_ns, d_inode(parent), |
6c5e36d1 HL |
114 | MAY_EXEC | MAY_WRITE); |
115 | ||
116 | inode_unlock(d_inode(parent)); | |
117 | dput(parent); | |
ff1d5727 | 118 | return ret; |
f4415848 NJ |
119 | } |
120 | ||
af34983e HL |
121 | int ksmbd_vfs_query_maximal_access(struct user_namespace *user_ns, |
122 | struct dentry *dentry, __le32 *daccess) | |
f4415848 | 123 | { |
333111a6 | 124 | struct dentry *parent; |
ff1d5727 | 125 | int ret = 0; |
f4415848 NJ |
126 | |
127 | *daccess = cpu_to_le32(FILE_READ_ATTRIBUTES | READ_CONTROL); | |
128 | ||
af34983e | 129 | if (!inode_permission(user_ns, d_inode(dentry), MAY_OPEN | MAY_WRITE)) |
f4415848 NJ |
130 | *daccess |= cpu_to_le32(WRITE_DAC | WRITE_OWNER | SYNCHRONIZE | |
131 | FILE_WRITE_DATA | FILE_APPEND_DATA | | |
132 | FILE_WRITE_EA | FILE_WRITE_ATTRIBUTES | | |
133 | FILE_DELETE_CHILD); | |
134 | ||
af34983e | 135 | if (!inode_permission(user_ns, d_inode(dentry), MAY_OPEN | MAY_READ)) |
f4415848 NJ |
136 | *daccess |= FILE_READ_DATA_LE | FILE_READ_EA_LE; |
137 | ||
af34983e | 138 | if (!inode_permission(user_ns, d_inode(dentry), MAY_OPEN | MAY_EXEC)) |
f4415848 NJ |
139 | *daccess |= FILE_EXECUTE_LE; |
140 | ||
141 | parent = dget_parent(dentry); | |
da1e7ada | 142 | ret = ksmbd_vfs_lock_parent(user_ns, parent, dentry); |
333111a6 HL |
143 | if (ret) { |
144 | dput(parent); | |
145 | return ret; | |
ff1d5727 | 146 | } |
f4415848 | 147 | |
af34983e | 148 | if (!inode_permission(user_ns, d_inode(parent), MAY_EXEC | MAY_WRITE)) |
f4415848 | 149 | *daccess |= FILE_DELETE_LE; |
ff1d5727 | 150 | |
ff1d5727 | 151 | inode_unlock(d_inode(parent)); |
f4415848 | 152 | dput(parent); |
ff1d5727 | 153 | return ret; |
f4415848 NJ |
154 | } |
155 | ||
f4415848 NJ |
156 | /** |
157 | * ksmbd_vfs_create() - vfs helper for smb create file | |
158 | * @work: work | |
265fd199 | 159 | * @name: file name that is relative to share |
f4415848 NJ |
160 | * @mode: file create mode |
161 | * | |
162 | * Return: 0 on success, otherwise error | |
163 | */ | |
64b39f4a | 164 | int ksmbd_vfs_create(struct ksmbd_work *work, const char *name, umode_t mode) |
f4415848 NJ |
165 | { |
166 | struct path path; | |
167 | struct dentry *dentry; | |
168 | int err; | |
169 | ||
265fd199 HL |
170 | dentry = ksmbd_vfs_kern_path_create(work, name, |
171 | LOOKUP_NO_SYMLINKS, &path); | |
f4415848 NJ |
172 | if (IS_ERR(dentry)) { |
173 | err = PTR_ERR(dentry); | |
174 | if (err != -ENOENT) | |
bde1694a NJ |
175 | pr_err("path create failed for %s, err %d\n", |
176 | name, err); | |
f4415848 NJ |
177 | return err; |
178 | } | |
179 | ||
180 | mode |= S_IFREG; | |
af34983e HL |
181 | err = vfs_create(mnt_user_ns(path.mnt), d_inode(path.dentry), |
182 | dentry, mode, true); | |
f4415848 NJ |
183 | if (!err) { |
184 | ksmbd_vfs_inherit_owner(work, d_inode(path.dentry), | |
070fb21e | 185 | d_inode(dentry)); |
f4415848 | 186 | } else { |
bde1694a | 187 | pr_err("File(%s): creation failed (err:%d)\n", name, err); |
f4415848 NJ |
188 | } |
189 | done_path_create(&path, dentry); | |
190 | return err; | |
191 | } | |
192 | ||
193 | /** | |
194 | * ksmbd_vfs_mkdir() - vfs helper for smb create directory | |
195 | * @work: work | |
265fd199 | 196 | * @name: directory name that is relative to share |
f4415848 NJ |
197 | * @mode: directory create mode |
198 | * | |
199 | * Return: 0 on success, otherwise error | |
200 | */ | |
64b39f4a | 201 | int ksmbd_vfs_mkdir(struct ksmbd_work *work, const char *name, umode_t mode) |
f4415848 | 202 | { |
da1e7ada | 203 | struct user_namespace *user_ns; |
f4415848 NJ |
204 | struct path path; |
205 | struct dentry *dentry; | |
206 | int err; | |
207 | ||
265fd199 HL |
208 | dentry = ksmbd_vfs_kern_path_create(work, name, |
209 | LOOKUP_NO_SYMLINKS | LOOKUP_DIRECTORY, | |
210 | &path); | |
f4415848 NJ |
211 | if (IS_ERR(dentry)) { |
212 | err = PTR_ERR(dentry); | |
213 | if (err != -EEXIST) | |
214 | ksmbd_debug(VFS, "path create failed for %s, err %d\n", | |
070fb21e | 215 | name, err); |
f4415848 NJ |
216 | return err; |
217 | } | |
218 | ||
da1e7ada | 219 | user_ns = mnt_user_ns(path.mnt); |
f4415848 | 220 | mode |= S_IFDIR; |
da1e7ada | 221 | err = vfs_mkdir(user_ns, d_inode(path.dentry), dentry, mode); |
a2d6321b | 222 | if (err) { |
16370235 | 223 | goto out; |
a2d6321b | 224 | } else if (d_unhashed(dentry)) { |
16370235 HL |
225 | struct dentry *d; |
226 | ||
da1e7ada CB |
227 | d = lookup_one(user_ns, dentry->d_name.name, dentry->d_parent, |
228 | dentry->d_name.len); | |
16370235 HL |
229 | if (IS_ERR(d)) { |
230 | err = PTR_ERR(d); | |
231 | goto out; | |
232 | } | |
233 | if (unlikely(d_is_negative(d))) { | |
234 | dput(d); | |
235 | err = -ENOENT; | |
236 | goto out; | |
237 | } | |
238 | ||
070fb21e | 239 | ksmbd_vfs_inherit_owner(work, d_inode(path.dentry), d_inode(d)); |
16370235 | 240 | dput(d); |
64b39f4a | 241 | } |
16370235 | 242 | out: |
f4415848 | 243 | done_path_create(&path, dentry); |
16370235 | 244 | if (err) |
bde1694a | 245 | pr_err("mkdir(%s): creation failed (err:%d)\n", name, err); |
f4415848 NJ |
246 | return err; |
247 | } | |
248 | ||
af34983e HL |
249 | static ssize_t ksmbd_vfs_getcasexattr(struct user_namespace *user_ns, |
250 | struct dentry *dentry, char *attr_name, | |
070fb21e | 251 | int attr_name_len, char **attr_value) |
f4415848 NJ |
252 | { |
253 | char *name, *xattr_list = NULL; | |
254 | ssize_t value_len = -ENOENT, xattr_list_len; | |
255 | ||
256 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
257 | if (xattr_list_len <= 0) | |
258 | goto out; | |
259 | ||
260 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
261 | name += strlen(name) + 1) { | |
262 | ksmbd_debug(VFS, "%s, len %zd\n", name, strlen(name)); | |
263 | if (strncasecmp(attr_name, name, attr_name_len)) | |
264 | continue; | |
265 | ||
af34983e HL |
266 | value_len = ksmbd_vfs_getxattr(user_ns, |
267 | dentry, | |
f4415848 NJ |
268 | name, |
269 | attr_value); | |
270 | if (value_len < 0) | |
bde1694a | 271 | pr_err("failed to get xattr in file\n"); |
f4415848 NJ |
272 | break; |
273 | } | |
274 | ||
275 | out: | |
79f6b11a | 276 | kvfree(xattr_list); |
f4415848 NJ |
277 | return value_len; |
278 | } | |
279 | ||
280 | static int ksmbd_vfs_stream_read(struct ksmbd_file *fp, char *buf, loff_t *pos, | |
070fb21e | 281 | size_t count) |
f4415848 NJ |
282 | { |
283 | ssize_t v_len; | |
284 | char *stream_buf = NULL; | |
f4415848 NJ |
285 | |
286 | ksmbd_debug(VFS, "read stream data pos : %llu, count : %zd\n", | |
070fb21e | 287 | *pos, count); |
f4415848 | 288 | |
af34983e HL |
289 | v_len = ksmbd_vfs_getcasexattr(file_mnt_user_ns(fp->filp), |
290 | fp->filp->f_path.dentry, | |
f4415848 NJ |
291 | fp->stream.name, |
292 | fp->stream.size, | |
293 | &stream_buf); | |
fd6de099 YY |
294 | if ((int)v_len <= 0) |
295 | return (int)v_len; | |
f4415848 | 296 | |
2ae1a6cc NJ |
297 | if (v_len <= *pos) { |
298 | count = -EINVAL; | |
299 | goto free_buf; | |
300 | } | |
301 | ||
302 | if (v_len - *pos < count) | |
303 | count = v_len - *pos; | |
304 | ||
f4415848 | 305 | memcpy(buf, &stream_buf[*pos], count); |
2ae1a6cc NJ |
306 | |
307 | free_buf: | |
673b9ba7 | 308 | kvfree(stream_buf); |
2ae1a6cc | 309 | return count; |
f4415848 NJ |
310 | } |
311 | ||
312 | /** | |
313 | * check_lock_range() - vfs helper for smb byte range file locking | |
314 | * @filp: the file to apply the lock to | |
315 | * @start: lock start byte offset | |
316 | * @end: lock end byte offset | |
317 | * @type: byte range type read/write | |
318 | * | |
319 | * Return: 0 on success, otherwise error | |
320 | */ | |
64b39f4a | 321 | static int check_lock_range(struct file *filp, loff_t start, loff_t end, |
070fb21e | 322 | unsigned char type) |
f4415848 NJ |
323 | { |
324 | struct file_lock *flock; | |
325 | struct file_lock_context *ctx = file_inode(filp)->i_flctx; | |
326 | int error = 0; | |
327 | ||
328 | if (!ctx || list_empty_careful(&ctx->flc_posix)) | |
329 | return 0; | |
330 | ||
331 | spin_lock(&ctx->flc_lock); | |
332 | list_for_each_entry(flock, &ctx->flc_posix, fl_list) { | |
333 | /* check conflict locks */ | |
334 | if (flock->fl_end >= start && end >= flock->fl_start) { | |
335 | if (flock->fl_type == F_RDLCK) { | |
336 | if (type == WRITE) { | |
bde1694a | 337 | pr_err("not allow write by shared lock\n"); |
f4415848 NJ |
338 | error = 1; |
339 | goto out; | |
340 | } | |
341 | } else if (flock->fl_type == F_WRLCK) { | |
342 | /* check owner in lock */ | |
343 | if (flock->fl_file != filp) { | |
344 | error = 1; | |
bde1694a | 345 | pr_err("not allow rw access by exclusive lock from other opens\n"); |
f4415848 NJ |
346 | goto out; |
347 | } | |
348 | } | |
349 | } | |
350 | } | |
351 | out: | |
352 | spin_unlock(&ctx->flc_lock); | |
353 | return error; | |
354 | } | |
355 | ||
356 | /** | |
357 | * ksmbd_vfs_read() - vfs helper for smb file read | |
358 | * @work: smb work | |
359 | * @fid: file id of open file | |
360 | * @count: read byte count | |
361 | * @pos: file pos | |
362 | * | |
363 | * Return: number of read bytes on success, otherwise error | |
364 | */ | |
64b39f4a | 365 | int ksmbd_vfs_read(struct ksmbd_work *work, struct ksmbd_file *fp, size_t count, |
070fb21e | 366 | loff_t *pos) |
f4415848 | 367 | { |
afa8f016 | 368 | struct file *filp = fp->filp; |
f4415848 | 369 | ssize_t nbytes = 0; |
afa8f016 NJ |
370 | char *rbuf = work->aux_payload_buf; |
371 | struct inode *inode = file_inode(filp); | |
f4415848 | 372 | |
f4415848 NJ |
373 | if (S_ISDIR(inode->i_mode)) |
374 | return -EISDIR; | |
375 | ||
376 | if (unlikely(count == 0)) | |
377 | return 0; | |
378 | ||
379 | if (work->conn->connection_type) { | |
380 | if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_EXECUTE_LE))) { | |
493fa2fb NJ |
381 | pr_err("no right to read(%pd)\n", |
382 | fp->filp->f_path.dentry); | |
f4415848 NJ |
383 | return -EACCES; |
384 | } | |
385 | } | |
386 | ||
387 | if (ksmbd_stream_fd(fp)) | |
388 | return ksmbd_vfs_stream_read(fp, rbuf, pos, count); | |
389 | ||
c36fca86 NJ |
390 | if (!work->tcon->posix_extensions) { |
391 | int ret; | |
392 | ||
070fb21e | 393 | ret = check_lock_range(filp, *pos, *pos + count - 1, READ); |
c36fca86 | 394 | if (ret) { |
bde1694a | 395 | pr_err("unable to read due to lock\n"); |
c36fca86 NJ |
396 | return -EAGAIN; |
397 | } | |
f4415848 NJ |
398 | } |
399 | ||
400 | nbytes = kernel_read(filp, rbuf, count, pos); | |
401 | if (nbytes < 0) { | |
bde1694a NJ |
402 | pr_err("smb read failed for (%s), err = %zd\n", |
403 | fp->filename, nbytes); | |
f4415848 NJ |
404 | return nbytes; |
405 | } | |
406 | ||
407 | filp->f_pos = *pos; | |
408 | return nbytes; | |
409 | } | |
410 | ||
411 | static int ksmbd_vfs_stream_write(struct ksmbd_file *fp, char *buf, loff_t *pos, | |
070fb21e | 412 | size_t count) |
f4415848 NJ |
413 | { |
414 | char *stream_buf = NULL, *wbuf; | |
465d7204 | 415 | struct user_namespace *user_ns = file_mnt_user_ns(fp->filp); |
f4415848 NJ |
416 | size_t size, v_len; |
417 | int err = 0; | |
418 | ||
419 | ksmbd_debug(VFS, "write stream data pos : %llu, count : %zd\n", | |
070fb21e | 420 | *pos, count); |
f4415848 NJ |
421 | |
422 | size = *pos + count; | |
423 | if (size > XATTR_SIZE_MAX) { | |
424 | size = XATTR_SIZE_MAX; | |
425 | count = (*pos + count) - XATTR_SIZE_MAX; | |
426 | } | |
427 | ||
465d7204 | 428 | v_len = ksmbd_vfs_getcasexattr(user_ns, |
af34983e | 429 | fp->filp->f_path.dentry, |
f4415848 NJ |
430 | fp->stream.name, |
431 | fp->stream.size, | |
432 | &stream_buf); | |
fd6de099 | 433 | if ((int)v_len < 0) { |
bde1694a | 434 | pr_err("not found stream in xattr : %zd\n", v_len); |
fd6de099 | 435 | err = (int)v_len; |
f4415848 NJ |
436 | goto out; |
437 | } | |
438 | ||
439 | if (v_len < size) { | |
79f6b11a | 440 | wbuf = kvmalloc(size, GFP_KERNEL | __GFP_ZERO); |
f4415848 NJ |
441 | if (!wbuf) { |
442 | err = -ENOMEM; | |
443 | goto out; | |
444 | } | |
445 | ||
446 | if (v_len > 0) | |
447 | memcpy(wbuf, stream_buf, v_len); | |
113ef68d | 448 | kvfree(stream_buf); |
f4415848 NJ |
449 | stream_buf = wbuf; |
450 | } | |
451 | ||
452 | memcpy(&stream_buf[*pos], buf, count); | |
453 | ||
465d7204 | 454 | err = ksmbd_vfs_setxattr(user_ns, |
af34983e | 455 | fp->filp->f_path.dentry, |
f4415848 NJ |
456 | fp->stream.name, |
457 | (void *)stream_buf, | |
458 | size, | |
459 | 0); | |
460 | if (err < 0) | |
461 | goto out; | |
462 | ||
463 | fp->filp->f_pos = *pos; | |
464 | err = 0; | |
465 | out: | |
79f6b11a | 466 | kvfree(stream_buf); |
f4415848 NJ |
467 | return err; |
468 | } | |
469 | ||
470 | /** | |
471 | * ksmbd_vfs_write() - vfs helper for smb file write | |
472 | * @work: work | |
473 | * @fid: file id of open file | |
474 | * @buf: buf containing data for writing | |
475 | * @count: read byte count | |
476 | * @pos: file pos | |
477 | * @sync: fsync after write | |
478 | * @written: number of bytes written | |
479 | * | |
480 | * Return: 0 on success, otherwise error | |
481 | */ | |
482 | int ksmbd_vfs_write(struct ksmbd_work *work, struct ksmbd_file *fp, | |
070fb21e NJ |
483 | char *buf, size_t count, loff_t *pos, bool sync, |
484 | ssize_t *written) | |
f4415848 NJ |
485 | { |
486 | struct ksmbd_session *sess = work->sess; | |
487 | struct file *filp; | |
488 | loff_t offset = *pos; | |
489 | int err = 0; | |
490 | ||
491 | if (sess->conn->connection_type) { | |
492 | if (!(fp->daccess & FILE_WRITE_DATA_LE)) { | |
493fa2fb NJ |
493 | pr_err("no right to write(%pd)\n", |
494 | fp->filp->f_path.dentry); | |
f4415848 NJ |
495 | err = -EACCES; |
496 | goto out; | |
497 | } | |
498 | } | |
499 | ||
500 | filp = fp->filp; | |
501 | ||
502 | if (ksmbd_stream_fd(fp)) { | |
503 | err = ksmbd_vfs_stream_write(fp, buf, pos, count); | |
504 | if (!err) | |
505 | *written = count; | |
506 | goto out; | |
507 | } | |
508 | ||
c36fca86 NJ |
509 | if (!work->tcon->posix_extensions) { |
510 | err = check_lock_range(filp, *pos, *pos + count - 1, WRITE); | |
511 | if (err) { | |
bde1694a | 512 | pr_err("unable to write due to lock\n"); |
c36fca86 NJ |
513 | err = -EAGAIN; |
514 | goto out; | |
515 | } | |
f4415848 NJ |
516 | } |
517 | ||
518 | /* Do we need to break any of a levelII oplock? */ | |
519 | smb_break_all_levII_oplock(work, fp, 1); | |
520 | ||
521 | err = kernel_write(filp, buf, count, pos); | |
522 | if (err < 0) { | |
523 | ksmbd_debug(VFS, "smb write failed, err = %d\n", err); | |
524 | goto out; | |
525 | } | |
526 | ||
527 | filp->f_pos = *pos; | |
528 | *written = err; | |
529 | err = 0; | |
530 | if (sync) { | |
531 | err = vfs_fsync_range(filp, offset, offset + *written, 0); | |
532 | if (err < 0) | |
493fa2fb NJ |
533 | pr_err("fsync failed for filename = %pd, err = %d\n", |
534 | fp->filp->f_path.dentry, err); | |
f4415848 NJ |
535 | } |
536 | ||
537 | out: | |
538 | return err; | |
539 | } | |
540 | ||
541 | /** | |
542 | * ksmbd_vfs_getattr() - vfs helper for smb getattr | |
543 | * @work: work | |
544 | * @fid: file id of open file | |
545 | * @attrs: inode attributes | |
546 | * | |
547 | * Return: 0 on success, otherwise error | |
548 | */ | |
549 | int ksmbd_vfs_getattr(struct path *path, struct kstat *stat) | |
550 | { | |
551 | int err; | |
552 | ||
553 | err = vfs_getattr(path, stat, STATX_BTIME, AT_STATX_SYNC_AS_STAT); | |
554 | if (err) | |
bde1694a | 555 | pr_err("getattr failed, err %d\n", err); |
f4415848 NJ |
556 | return err; |
557 | } | |
558 | ||
559 | /** | |
560 | * ksmbd_vfs_fsync() - vfs helper for smb fsync | |
561 | * @work: work | |
562 | * @fid: file id of open file | |
563 | * | |
564 | * Return: 0 on success, otherwise error | |
565 | */ | |
64b39f4a | 566 | int ksmbd_vfs_fsync(struct ksmbd_work *work, u64 fid, u64 p_id) |
f4415848 NJ |
567 | { |
568 | struct ksmbd_file *fp; | |
569 | int err; | |
570 | ||
571 | fp = ksmbd_lookup_fd_slow(work, fid, p_id); | |
572 | if (!fp) { | |
bde1694a | 573 | pr_err("failed to get filp for fid %llu\n", fid); |
f4415848 NJ |
574 | return -ENOENT; |
575 | } | |
576 | err = vfs_fsync(fp->filp, 0); | |
577 | if (err < 0) | |
bde1694a | 578 | pr_err("smb fsync failed, err = %d\n", err); |
f4415848 NJ |
579 | ksmbd_fd_put(work, fp); |
580 | return err; | |
581 | } | |
582 | ||
583 | /** | |
584 | * ksmbd_vfs_remove_file() - vfs helper for smb rmdir or unlink | |
265fd199 | 585 | * @name: directory or file name that is relative to share |
f4415848 NJ |
586 | * |
587 | * Return: 0 on success, otherwise error | |
588 | */ | |
589 | int ksmbd_vfs_remove_file(struct ksmbd_work *work, char *name) | |
590 | { | |
da1e7ada | 591 | struct user_namespace *user_ns; |
7c3d3e99 | 592 | struct path path; |
333111a6 | 593 | struct dentry *parent; |
3161ad3a | 594 | int err; |
f4415848 | 595 | |
f4415848 NJ |
596 | if (ksmbd_override_fsids(work)) |
597 | return -ENOMEM; | |
598 | ||
265fd199 | 599 | err = ksmbd_vfs_kern_path(work, name, LOOKUP_NO_SYMLINKS, &path, false); |
f4415848 NJ |
600 | if (err) { |
601 | ksmbd_debug(VFS, "can't get %s, err %d\n", name, err); | |
602 | ksmbd_revert_fsids(work); | |
f4415848 NJ |
603 | return err; |
604 | } | |
605 | ||
da1e7ada | 606 | user_ns = mnt_user_ns(path.mnt); |
7c3d3e99 | 607 | parent = dget_parent(path.dentry); |
da1e7ada | 608 | err = ksmbd_vfs_lock_parent(user_ns, parent, path.dentry); |
333111a6 HL |
609 | if (err) { |
610 | dput(parent); | |
611 | path_put(&path); | |
612 | ksmbd_revert_fsids(work); | |
613 | return err; | |
f4415848 NJ |
614 | } |
615 | ||
333111a6 | 616 | if (!d_inode(path.dentry)->i_nlink) { |
f4415848 NJ |
617 | err = -ENOENT; |
618 | goto out_err; | |
619 | } | |
620 | ||
333111a6 | 621 | if (S_ISDIR(d_inode(path.dentry)->i_mode)) { |
da1e7ada | 622 | err = vfs_rmdir(user_ns, d_inode(parent), path.dentry); |
f4415848 NJ |
623 | if (err && err != -ENOTEMPTY) |
624 | ksmbd_debug(VFS, "%s: rmdir failed, err %d\n", name, | |
070fb21e | 625 | err); |
f4415848 | 626 | } else { |
da1e7ada | 627 | err = vfs_unlink(user_ns, d_inode(parent), path.dentry, NULL); |
f4415848 NJ |
628 | if (err) |
629 | ksmbd_debug(VFS, "%s: unlink failed, err %d\n", name, | |
070fb21e | 630 | err); |
f4415848 NJ |
631 | } |
632 | ||
f4415848 | 633 | out_err: |
7c3d3e99 NJ |
634 | inode_unlock(d_inode(parent)); |
635 | dput(parent); | |
636 | path_put(&path); | |
f4415848 NJ |
637 | ksmbd_revert_fsids(work); |
638 | return err; | |
639 | } | |
640 | ||
641 | /** | |
642 | * ksmbd_vfs_link() - vfs helper for creating smb hardlink | |
643 | * @oldname: source file name | |
265fd199 | 644 | * @newname: hardlink name that is relative to share |
f4415848 NJ |
645 | * |
646 | * Return: 0 on success, otherwise error | |
647 | */ | |
64b39f4a | 648 | int ksmbd_vfs_link(struct ksmbd_work *work, const char *oldname, |
070fb21e | 649 | const char *newname) |
f4415848 NJ |
650 | { |
651 | struct path oldpath, newpath; | |
652 | struct dentry *dentry; | |
653 | int err; | |
654 | ||
655 | if (ksmbd_override_fsids(work)) | |
656 | return -ENOMEM; | |
657 | ||
4ea47798 | 658 | err = kern_path(oldname, LOOKUP_NO_SYMLINKS, &oldpath); |
f4415848 | 659 | if (err) { |
bde1694a NJ |
660 | pr_err("cannot get linux path for %s, err = %d\n", |
661 | oldname, err); | |
f4415848 NJ |
662 | goto out1; |
663 | } | |
664 | ||
265fd199 HL |
665 | dentry = ksmbd_vfs_kern_path_create(work, newname, |
666 | LOOKUP_NO_SYMLINKS | LOOKUP_REVAL, | |
667 | &newpath); | |
f4415848 NJ |
668 | if (IS_ERR(dentry)) { |
669 | err = PTR_ERR(dentry); | |
bde1694a | 670 | pr_err("path create err for %s, err %d\n", newname, err); |
f4415848 NJ |
671 | goto out2; |
672 | } | |
673 | ||
674 | err = -EXDEV; | |
675 | if (oldpath.mnt != newpath.mnt) { | |
bde1694a | 676 | pr_err("vfs_link failed err %d\n", err); |
f4415848 NJ |
677 | goto out3; |
678 | } | |
679 | ||
af34983e HL |
680 | err = vfs_link(oldpath.dentry, mnt_user_ns(newpath.mnt), |
681 | d_inode(newpath.dentry), | |
070fb21e | 682 | dentry, NULL); |
f4415848 NJ |
683 | if (err) |
684 | ksmbd_debug(VFS, "vfs_link failed err %d\n", err); | |
685 | ||
686 | out3: | |
687 | done_path_create(&newpath, dentry); | |
688 | out2: | |
689 | path_put(&oldpath); | |
690 | out1: | |
691 | ksmbd_revert_fsids(work); | |
692 | return err; | |
693 | } | |
694 | ||
4b637fc1 NJ |
695 | static int ksmbd_validate_entry_in_use(struct dentry *src_dent) |
696 | { | |
697 | struct dentry *dst_dent; | |
698 | ||
699 | spin_lock(&src_dent->d_lock); | |
700 | list_for_each_entry(dst_dent, &src_dent->d_subdirs, d_child) { | |
701 | struct ksmbd_file *child_fp; | |
702 | ||
703 | if (d_really_is_negative(dst_dent)) | |
704 | continue; | |
705 | ||
706 | child_fp = ksmbd_lookup_fd_inode(d_inode(dst_dent)); | |
707 | if (child_fp) { | |
708 | spin_unlock(&src_dent->d_lock); | |
709 | ksmbd_debug(VFS, "Forbid rename, sub file/dir is in use\n"); | |
710 | return -EACCES; | |
711 | } | |
712 | } | |
713 | spin_unlock(&src_dent->d_lock); | |
714 | ||
715 | return 0; | |
716 | } | |
717 | ||
f4415848 | 718 | static int __ksmbd_vfs_rename(struct ksmbd_work *work, |
af34983e | 719 | struct user_namespace *src_user_ns, |
070fb21e NJ |
720 | struct dentry *src_dent_parent, |
721 | struct dentry *src_dent, | |
af34983e | 722 | struct user_namespace *dst_user_ns, |
070fb21e NJ |
723 | struct dentry *dst_dent_parent, |
724 | struct dentry *trap_dent, | |
725 | char *dst_name) | |
f4415848 NJ |
726 | { |
727 | struct dentry *dst_dent; | |
728 | int err; | |
729 | ||
c36fca86 | 730 | if (!work->tcon->posix_extensions) { |
4b637fc1 NJ |
731 | err = ksmbd_validate_entry_in_use(src_dent); |
732 | if (err) | |
733 | return err; | |
f4415848 | 734 | } |
f4415848 NJ |
735 | |
736 | if (d_really_is_negative(src_dent_parent)) | |
737 | return -ENOENT; | |
738 | if (d_really_is_negative(dst_dent_parent)) | |
739 | return -ENOENT; | |
740 | if (d_really_is_negative(src_dent)) | |
741 | return -ENOENT; | |
742 | if (src_dent == trap_dent) | |
743 | return -EINVAL; | |
744 | ||
745 | if (ksmbd_override_fsids(work)) | |
746 | return -ENOMEM; | |
747 | ||
da1e7ada CB |
748 | dst_dent = lookup_one(dst_user_ns, dst_name, dst_dent_parent, |
749 | strlen(dst_name)); | |
f4415848 NJ |
750 | err = PTR_ERR(dst_dent); |
751 | if (IS_ERR(dst_dent)) { | |
bde1694a | 752 | pr_err("lookup failed %s [%d]\n", dst_name, err); |
f4415848 NJ |
753 | goto out; |
754 | } | |
755 | ||
756 | err = -ENOTEMPTY; | |
757 | if (dst_dent != trap_dent && !d_really_is_positive(dst_dent)) { | |
758 | struct renamedata rd = { | |
af34983e | 759 | .old_mnt_userns = src_user_ns, |
f4415848 NJ |
760 | .old_dir = d_inode(src_dent_parent), |
761 | .old_dentry = src_dent, | |
af34983e | 762 | .new_mnt_userns = dst_user_ns, |
f4415848 NJ |
763 | .new_dir = d_inode(dst_dent_parent), |
764 | .new_dentry = dst_dent, | |
765 | }; | |
766 | err = vfs_rename(&rd); | |
767 | } | |
768 | if (err) | |
bde1694a | 769 | pr_err("vfs_rename failed err %d\n", err); |
f4415848 NJ |
770 | if (dst_dent) |
771 | dput(dst_dent); | |
772 | out: | |
773 | ksmbd_revert_fsids(work); | |
774 | return err; | |
775 | } | |
776 | ||
777 | int ksmbd_vfs_fp_rename(struct ksmbd_work *work, struct ksmbd_file *fp, | |
070fb21e | 778 | char *newname) |
f4415848 | 779 | { |
da1e7ada | 780 | struct user_namespace *user_ns; |
f4415848 NJ |
781 | struct path dst_path; |
782 | struct dentry *src_dent_parent, *dst_dent_parent; | |
ff1d5727 | 783 | struct dentry *src_dent, *trap_dent, *src_child; |
f4415848 NJ |
784 | char *dst_name; |
785 | int err; | |
786 | ||
787 | dst_name = extract_last_component(newname); | |
265fd199 HL |
788 | if (!dst_name) { |
789 | dst_name = newname; | |
790 | newname = ""; | |
791 | } | |
f4415848 NJ |
792 | |
793 | src_dent_parent = dget_parent(fp->filp->f_path.dentry); | |
f4415848 | 794 | src_dent = fp->filp->f_path.dentry; |
f4415848 | 795 | |
265fd199 HL |
796 | err = ksmbd_vfs_kern_path(work, newname, |
797 | LOOKUP_NO_SYMLINKS | LOOKUP_DIRECTORY, | |
798 | &dst_path, false); | |
f4415848 NJ |
799 | if (err) { |
800 | ksmbd_debug(VFS, "Cannot get path for %s [%d]\n", newname, err); | |
801 | goto out; | |
802 | } | |
803 | dst_dent_parent = dst_path.dentry; | |
f4415848 NJ |
804 | |
805 | trap_dent = lock_rename(src_dent_parent, dst_dent_parent); | |
ff1d5727 NJ |
806 | dget(src_dent); |
807 | dget(dst_dent_parent); | |
da1e7ada CB |
808 | user_ns = file_mnt_user_ns(fp->filp); |
809 | src_child = lookup_one(user_ns, src_dent->d_name.name, src_dent_parent, | |
810 | src_dent->d_name.len); | |
ff1d5727 NJ |
811 | if (IS_ERR(src_child)) { |
812 | err = PTR_ERR(src_child); | |
813 | goto out_lock; | |
814 | } | |
815 | ||
816 | if (src_child != src_dent) { | |
817 | err = -ESTALE; | |
818 | dput(src_child); | |
819 | goto out_lock; | |
820 | } | |
821 | dput(src_child); | |
822 | ||
f4415848 | 823 | err = __ksmbd_vfs_rename(work, |
da1e7ada | 824 | user_ns, |
f4415848 NJ |
825 | src_dent_parent, |
826 | src_dent, | |
af34983e | 827 | mnt_user_ns(dst_path.mnt), |
f4415848 NJ |
828 | dst_dent_parent, |
829 | trap_dent, | |
830 | dst_name); | |
ff1d5727 NJ |
831 | out_lock: |
832 | dput(src_dent); | |
f4415848 | 833 | dput(dst_dent_parent); |
ff1d5727 | 834 | unlock_rename(src_dent_parent, dst_dent_parent); |
f4415848 NJ |
835 | path_put(&dst_path); |
836 | out: | |
f4415848 NJ |
837 | dput(src_dent_parent); |
838 | return err; | |
839 | } | |
840 | ||
841 | /** | |
842 | * ksmbd_vfs_truncate() - vfs helper for smb file truncate | |
843 | * @work: work | |
f4415848 NJ |
844 | * @fid: file id of old file |
845 | * @size: truncate to given size | |
846 | * | |
847 | * Return: 0 on success, otherwise error | |
848 | */ | |
265fd199 | 849 | int ksmbd_vfs_truncate(struct ksmbd_work *work, |
070fb21e | 850 | struct ksmbd_file *fp, loff_t size) |
f4415848 | 851 | { |
f4415848 | 852 | int err = 0; |
265fd199 | 853 | struct file *filp; |
f4415848 | 854 | |
265fd199 | 855 | filp = fp->filp; |
f4415848 | 856 | |
265fd199 HL |
857 | /* Do we need to break any of a levelII oplock? */ |
858 | smb_break_all_levII_oplock(work, fp, 1); | |
c36fca86 | 859 | |
265fd199 HL |
860 | if (!work->tcon->posix_extensions) { |
861 | struct inode *inode = file_inode(filp); | |
862 | ||
863 | if (size < inode->i_size) { | |
864 | err = check_lock_range(filp, size, | |
865 | inode->i_size - 1, WRITE); | |
866 | } else { | |
867 | err = check_lock_range(filp, inode->i_size, | |
868 | size - 1, WRITE); | |
f4415848 NJ |
869 | } |
870 | ||
265fd199 HL |
871 | if (err) { |
872 | pr_err("failed due to lock\n"); | |
873 | return -EAGAIN; | |
874 | } | |
f4415848 NJ |
875 | } |
876 | ||
265fd199 HL |
877 | err = vfs_truncate(&filp->f_path, size); |
878 | if (err) | |
879 | pr_err("truncate failed for filename : %s err %d\n", | |
880 | fp->filename, err); | |
f4415848 NJ |
881 | return err; |
882 | } | |
883 | ||
884 | /** | |
885 | * ksmbd_vfs_listxattr() - vfs helper for smb list extended attributes | |
886 | * @dentry: dentry of file for listing xattrs | |
887 | * @list: destination buffer | |
888 | * @size: destination buffer length | |
889 | * | |
890 | * Return: xattr list length on success, otherwise error | |
891 | */ | |
892 | ssize_t ksmbd_vfs_listxattr(struct dentry *dentry, char **list) | |
893 | { | |
894 | ssize_t size; | |
895 | char *vlist = NULL; | |
896 | ||
897 | size = vfs_listxattr(dentry, NULL, 0); | |
898 | if (size <= 0) | |
899 | return size; | |
900 | ||
79f6b11a | 901 | vlist = kvmalloc(size, GFP_KERNEL | __GFP_ZERO); |
f4415848 NJ |
902 | if (!vlist) |
903 | return -ENOMEM; | |
904 | ||
905 | *list = vlist; | |
906 | size = vfs_listxattr(dentry, vlist, size); | |
907 | if (size < 0) { | |
908 | ksmbd_debug(VFS, "listxattr failed\n"); | |
79f6b11a | 909 | kvfree(vlist); |
f4415848 NJ |
910 | *list = NULL; |
911 | } | |
912 | ||
913 | return size; | |
914 | } | |
915 | ||
af34983e HL |
916 | static ssize_t ksmbd_vfs_xattr_len(struct user_namespace *user_ns, |
917 | struct dentry *dentry, char *xattr_name) | |
f4415848 | 918 | { |
af34983e | 919 | return vfs_getxattr(user_ns, dentry, xattr_name, NULL, 0); |
f4415848 NJ |
920 | } |
921 | ||
922 | /** | |
923 | * ksmbd_vfs_getxattr() - vfs helper for smb get extended attributes value | |
af34983e | 924 | * @user_ns: user namespace |
f4415848 NJ |
925 | * @dentry: dentry of file for getting xattrs |
926 | * @xattr_name: name of xattr name to query | |
927 | * @xattr_buf: destination buffer xattr value | |
928 | * | |
929 | * Return: read xattr value length on success, otherwise error | |
930 | */ | |
af34983e HL |
931 | ssize_t ksmbd_vfs_getxattr(struct user_namespace *user_ns, |
932 | struct dentry *dentry, | |
933 | char *xattr_name, char **xattr_buf) | |
f4415848 NJ |
934 | { |
935 | ssize_t xattr_len; | |
936 | char *buf; | |
937 | ||
938 | *xattr_buf = NULL; | |
af34983e | 939 | xattr_len = ksmbd_vfs_xattr_len(user_ns, dentry, xattr_name); |
f4415848 NJ |
940 | if (xattr_len < 0) |
941 | return xattr_len; | |
942 | ||
943 | buf = kmalloc(xattr_len + 1, GFP_KERNEL); | |
944 | if (!buf) | |
945 | return -ENOMEM; | |
946 | ||
af34983e | 947 | xattr_len = vfs_getxattr(user_ns, dentry, xattr_name, |
d7e5852b | 948 | (void *)buf, xattr_len); |
f4415848 NJ |
949 | if (xattr_len > 0) |
950 | *xattr_buf = buf; | |
951 | else | |
952 | kfree(buf); | |
953 | return xattr_len; | |
954 | } | |
955 | ||
956 | /** | |
957 | * ksmbd_vfs_setxattr() - vfs helper for smb set extended attributes value | |
af34983e | 958 | * @user_ns: user namespace |
f4415848 NJ |
959 | * @dentry: dentry to set XATTR at |
960 | * @name: xattr name for setxattr | |
961 | * @value: xattr value to set | |
962 | * @size: size of xattr value | |
963 | * @flags: destination buffer length | |
964 | * | |
965 | * Return: 0 on success, otherwise error | |
966 | */ | |
af34983e HL |
967 | int ksmbd_vfs_setxattr(struct user_namespace *user_ns, |
968 | struct dentry *dentry, const char *attr_name, | |
070fb21e | 969 | const void *attr_value, size_t attr_size, int flags) |
f4415848 NJ |
970 | { |
971 | int err; | |
972 | ||
af34983e HL |
973 | err = vfs_setxattr(user_ns, |
974 | dentry, | |
f4415848 NJ |
975 | attr_name, |
976 | attr_value, | |
977 | attr_size, | |
978 | flags); | |
979 | if (err) | |
980 | ksmbd_debug(VFS, "setxattr failed, err %d\n", err); | |
981 | return err; | |
982 | } | |
983 | ||
984 | /** | |
985 | * ksmbd_vfs_set_fadvise() - convert smb IO caching options to linux options | |
986 | * @filp: file pointer for IO | |
987 | * @options: smb IO options | |
988 | */ | |
989 | void ksmbd_vfs_set_fadvise(struct file *filp, __le32 option) | |
990 | { | |
991 | struct address_space *mapping; | |
992 | ||
993 | mapping = filp->f_mapping; | |
994 | ||
995 | if (!option || !mapping) | |
996 | return; | |
997 | ||
64b39f4a | 998 | if (option & FILE_WRITE_THROUGH_LE) { |
f4415848 | 999 | filp->f_flags |= O_SYNC; |
64b39f4a | 1000 | } else if (option & FILE_SEQUENTIAL_ONLY_LE) { |
f4415848 NJ |
1001 | filp->f_ra.ra_pages = inode_to_bdi(mapping->host)->ra_pages * 2; |
1002 | spin_lock(&filp->f_lock); | |
1003 | filp->f_mode &= ~FMODE_RANDOM; | |
1004 | spin_unlock(&filp->f_lock); | |
1005 | } else if (option & FILE_RANDOM_ACCESS_LE) { | |
1006 | spin_lock(&filp->f_lock); | |
1007 | filp->f_mode |= FMODE_RANDOM; | |
1008 | spin_unlock(&filp->f_lock); | |
1009 | } | |
1010 | } | |
1011 | ||
64b39f4a | 1012 | int ksmbd_vfs_zero_data(struct ksmbd_work *work, struct ksmbd_file *fp, |
070fb21e | 1013 | loff_t off, loff_t len) |
f4415848 NJ |
1014 | { |
1015 | smb_break_all_levII_oplock(work, fp, 1); | |
1016 | if (fp->f_ci->m_fattr & ATTR_SPARSE_FILE_LE) | |
1017 | return vfs_fallocate(fp->filp, | |
070fb21e NJ |
1018 | FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, |
1019 | off, len); | |
f4415848 NJ |
1020 | |
1021 | return vfs_fallocate(fp->filp, FALLOC_FL_ZERO_RANGE, off, len); | |
1022 | } | |
1023 | ||
1024 | int ksmbd_vfs_fqar_lseek(struct ksmbd_file *fp, loff_t start, loff_t length, | |
070fb21e | 1025 | struct file_allocated_range_buffer *ranges, |
f7db8fd0 | 1026 | unsigned int in_count, unsigned int *out_count) |
f4415848 NJ |
1027 | { |
1028 | struct file *f = fp->filp; | |
ab0b263b | 1029 | struct inode *inode = file_inode(fp->filp); |
f4415848 NJ |
1030 | loff_t maxbytes = (u64)inode->i_sb->s_maxbytes, end; |
1031 | loff_t extent_start, extent_end; | |
1032 | int ret = 0; | |
1033 | ||
1034 | if (start > maxbytes) | |
1035 | return -EFBIG; | |
1036 | ||
1037 | if (!in_count) | |
1038 | return 0; | |
1039 | ||
1040 | /* | |
1041 | * Shrink request scope to what the fs can actually handle. | |
1042 | */ | |
1043 | if (length > maxbytes || (maxbytes - length) < start) | |
1044 | length = maxbytes - start; | |
1045 | ||
1046 | if (start + length > inode->i_size) | |
1047 | length = inode->i_size - start; | |
1048 | ||
1049 | *out_count = 0; | |
1050 | end = start + length; | |
1051 | while (start < end && *out_count < in_count) { | |
1052 | extent_start = f->f_op->llseek(f, start, SEEK_DATA); | |
1053 | if (extent_start < 0) { | |
1054 | if (extent_start != -ENXIO) | |
1055 | ret = (int)extent_start; | |
1056 | break; | |
1057 | } | |
1058 | ||
1059 | if (extent_start >= end) | |
1060 | break; | |
1061 | ||
1062 | extent_end = f->f_op->llseek(f, extent_start, SEEK_HOLE); | |
1063 | if (extent_end < 0) { | |
1064 | if (extent_end != -ENXIO) | |
1065 | ret = (int)extent_end; | |
1066 | break; | |
64b39f4a | 1067 | } else if (extent_start >= extent_end) { |
f4415848 | 1068 | break; |
64b39f4a | 1069 | } |
f4415848 NJ |
1070 | |
1071 | ranges[*out_count].file_offset = cpu_to_le64(extent_start); | |
1072 | ranges[(*out_count)++].length = | |
1073 | cpu_to_le64(min(extent_end, end) - extent_start); | |
1074 | ||
1075 | start = extent_end; | |
1076 | } | |
1077 | ||
1078 | return ret; | |
1079 | } | |
1080 | ||
af34983e HL |
1081 | int ksmbd_vfs_remove_xattr(struct user_namespace *user_ns, |
1082 | struct dentry *dentry, char *attr_name) | |
f4415848 | 1083 | { |
af34983e | 1084 | return vfs_removexattr(user_ns, dentry, attr_name); |
f4415848 NJ |
1085 | } |
1086 | ||
af34983e HL |
1087 | int ksmbd_vfs_unlink(struct user_namespace *user_ns, |
1088 | struct dentry *dir, struct dentry *dentry) | |
f4415848 NJ |
1089 | { |
1090 | int err = 0; | |
1091 | ||
da1e7ada | 1092 | err = ksmbd_vfs_lock_parent(user_ns, dir, dentry); |
333111a6 HL |
1093 | if (err) |
1094 | return err; | |
ff1d5727 | 1095 | dget(dentry); |
f4415848 NJ |
1096 | |
1097 | if (S_ISDIR(d_inode(dentry)->i_mode)) | |
af34983e | 1098 | err = vfs_rmdir(user_ns, d_inode(dir), dentry); |
f4415848 | 1099 | else |
af34983e | 1100 | err = vfs_unlink(user_ns, d_inode(dir), dentry, NULL); |
f4415848 | 1101 | |
f4415848 | 1102 | dput(dentry); |
ff1d5727 | 1103 | inode_unlock(d_inode(dir)); |
f4415848 NJ |
1104 | if (err) |
1105 | ksmbd_debug(VFS, "failed to delete, err %d\n", err); | |
1106 | ||
1107 | return err; | |
1108 | } | |
1109 | ||
64b39f4a | 1110 | static int __dir_empty(struct dir_context *ctx, const char *name, int namlen, |
070fb21e | 1111 | loff_t offset, u64 ino, unsigned int d_type) |
f4415848 NJ |
1112 | { |
1113 | struct ksmbd_readdir_data *buf; | |
1114 | ||
1115 | buf = container_of(ctx, struct ksmbd_readdir_data, ctx); | |
1116 | buf->dirent_count++; | |
1117 | ||
1118 | if (buf->dirent_count > 2) | |
1119 | return -ENOTEMPTY; | |
1120 | return 0; | |
1121 | } | |
1122 | ||
1123 | /** | |
1124 | * ksmbd_vfs_empty_dir() - check for empty directory | |
1125 | * @fp: ksmbd file pointer | |
1126 | * | |
1127 | * Return: true if directory empty, otherwise false | |
1128 | */ | |
1129 | int ksmbd_vfs_empty_dir(struct ksmbd_file *fp) | |
1130 | { | |
1131 | int err; | |
1132 | struct ksmbd_readdir_data readdir_data; | |
1133 | ||
1134 | memset(&readdir_data, 0, sizeof(struct ksmbd_readdir_data)); | |
1135 | ||
1136 | set_ctx_actor(&readdir_data.ctx, __dir_empty); | |
1137 | readdir_data.dirent_count = 0; | |
1138 | ||
e8c06191 | 1139 | err = iterate_dir(fp->filp, &readdir_data.ctx); |
f4415848 NJ |
1140 | if (readdir_data.dirent_count > 2) |
1141 | err = -ENOTEMPTY; | |
1142 | else | |
1143 | err = 0; | |
1144 | return err; | |
1145 | } | |
1146 | ||
64b39f4a | 1147 | static int __caseless_lookup(struct dir_context *ctx, const char *name, |
070fb21e NJ |
1148 | int namlen, loff_t offset, u64 ino, |
1149 | unsigned int d_type) | |
f4415848 NJ |
1150 | { |
1151 | struct ksmbd_readdir_data *buf; | |
1152 | ||
1153 | buf = container_of(ctx, struct ksmbd_readdir_data, ctx); | |
1154 | ||
1155 | if (buf->used != namlen) | |
1156 | return 0; | |
1157 | if (!strncasecmp((char *)buf->private, name, namlen)) { | |
1158 | memcpy((char *)buf->private, name, namlen); | |
1159 | buf->dirent_count = 1; | |
1160 | return -EEXIST; | |
1161 | } | |
1162 | return 0; | |
1163 | } | |
1164 | ||
1165 | /** | |
1166 | * ksmbd_vfs_lookup_in_dir() - lookup a file in a directory | |
3c203783 HL |
1167 | * @dir: path info |
1168 | * @name: filename to lookup | |
1169 | * @namelen: filename length | |
f4415848 NJ |
1170 | * |
1171 | * Return: 0 on success, otherwise error | |
1172 | */ | |
3c203783 | 1173 | static int ksmbd_vfs_lookup_in_dir(struct path *dir, char *name, size_t namelen) |
f4415848 | 1174 | { |
f4415848 NJ |
1175 | int ret; |
1176 | struct file *dfilp; | |
64b39f4a | 1177 | int flags = O_RDONLY | O_LARGEFILE; |
f4415848 NJ |
1178 | struct ksmbd_readdir_data readdir_data = { |
1179 | .ctx.actor = __caseless_lookup, | |
3c203783 HL |
1180 | .private = name, |
1181 | .used = namelen, | |
1182 | .dirent_count = 0, | |
f4415848 NJ |
1183 | }; |
1184 | ||
3c203783 HL |
1185 | dfilp = dentry_open(dir, flags, current_cred()); |
1186 | if (IS_ERR(dfilp)) | |
1187 | return PTR_ERR(dfilp); | |
f4415848 | 1188 | |
e8c06191 | 1189 | ret = iterate_dir(dfilp, &readdir_data.ctx); |
f4415848 NJ |
1190 | if (readdir_data.dirent_count > 0) |
1191 | ret = 0; | |
f4415848 | 1192 | fput(dfilp); |
f4415848 NJ |
1193 | return ret; |
1194 | } | |
1195 | ||
1196 | /** | |
1197 | * ksmbd_vfs_kern_path() - lookup a file and get path info | |
265fd199 | 1198 | * @name: file path that is relative to share |
f4415848 NJ |
1199 | * @flags: lookup flags |
1200 | * @path: if lookup succeed, return path info | |
1201 | * @caseless: caseless filename lookup | |
1202 | * | |
1203 | * Return: 0 on success, otherwise error | |
1204 | */ | |
265fd199 HL |
1205 | int ksmbd_vfs_kern_path(struct ksmbd_work *work, char *name, |
1206 | unsigned int flags, struct path *path, bool caseless) | |
f4415848 | 1207 | { |
265fd199 | 1208 | struct ksmbd_share_config *share_conf = work->tcon->share_conf; |
f4415848 NJ |
1209 | int err; |
1210 | ||
265fd199 HL |
1211 | flags |= LOOKUP_BENEATH; |
1212 | err = vfs_path_lookup(share_conf->vfs_path.dentry, | |
1213 | share_conf->vfs_path.mnt, | |
1214 | name, | |
1215 | flags, | |
1216 | path); | |
f4415848 | 1217 | if (!err) |
3c203783 | 1218 | return 0; |
f4415848 NJ |
1219 | |
1220 | if (caseless) { | |
3c203783 HL |
1221 | char *filepath; |
1222 | struct path parent; | |
1223 | size_t path_len, remain_len; | |
f4415848 | 1224 | |
3c203783 HL |
1225 | filepath = kstrdup(name, GFP_KERNEL); |
1226 | if (!filepath) | |
1227 | return -ENOMEM; | |
1228 | ||
1229 | path_len = strlen(filepath); | |
265fd199 | 1230 | remain_len = path_len; |
f4415848 | 1231 | |
265fd199 HL |
1232 | parent = share_conf->vfs_path; |
1233 | path_get(&parent); | |
f4415848 | 1234 | |
3c203783 HL |
1235 | while (d_can_lookup(parent.dentry)) { |
1236 | char *filename = filepath + path_len - remain_len; | |
1237 | char *next = strchrnul(filename, '/'); | |
1238 | size_t filename_len = next - filename; | |
1239 | bool is_last = !next[0]; | |
1240 | ||
1241 | if (filename_len == 0) | |
1242 | break; | |
1243 | ||
1244 | err = ksmbd_vfs_lookup_in_dir(&parent, filename, | |
1245 | filename_len); | |
265fd199 HL |
1246 | path_put(&parent); |
1247 | if (err) | |
3c203783 | 1248 | goto out; |
3c203783 | 1249 | |
3c203783 HL |
1250 | next[0] = '\0'; |
1251 | ||
265fd199 HL |
1252 | err = vfs_path_lookup(share_conf->vfs_path.dentry, |
1253 | share_conf->vfs_path.mnt, | |
1254 | filepath, | |
1255 | flags, | |
1256 | &parent); | |
3c203783 HL |
1257 | if (err) |
1258 | goto out; | |
265fd199 HL |
1259 | else if (is_last) { |
1260 | *path = parent; | |
3c203783 HL |
1261 | goto out; |
1262 | } | |
1263 | ||
1264 | next[0] = '/'; | |
1265 | remain_len -= filename_len + 1; | |
1266 | } | |
1267 | ||
1268 | path_put(&parent); | |
1269 | err = -EINVAL; | |
f4415848 | 1270 | out: |
3c203783 HL |
1271 | kfree(filepath); |
1272 | } | |
f4415848 NJ |
1273 | return err; |
1274 | } | |
1275 | ||
265fd199 HL |
1276 | struct dentry *ksmbd_vfs_kern_path_create(struct ksmbd_work *work, |
1277 | const char *name, | |
1278 | unsigned int flags, | |
1279 | struct path *path) | |
1280 | { | |
1281 | char *abs_name; | |
1282 | struct dentry *dent; | |
1283 | ||
1284 | abs_name = convert_to_unix_name(work->tcon->share_conf, name); | |
1285 | if (!abs_name) | |
1286 | return ERR_PTR(-ENOMEM); | |
1287 | ||
1288 | dent = kern_path_create(AT_FDCWD, abs_name, path, flags); | |
1289 | kfree(abs_name); | |
1290 | return dent; | |
1291 | } | |
1292 | ||
af34983e HL |
1293 | int ksmbd_vfs_remove_acl_xattrs(struct user_namespace *user_ns, |
1294 | struct dentry *dentry) | |
f4415848 NJ |
1295 | { |
1296 | char *name, *xattr_list = NULL; | |
1297 | ssize_t xattr_list_len; | |
1298 | int err = 0; | |
1299 | ||
1300 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
1301 | if (xattr_list_len < 0) { | |
1302 | goto out; | |
1303 | } else if (!xattr_list_len) { | |
1304 | ksmbd_debug(SMB, "empty xattr in the file\n"); | |
1305 | goto out; | |
1306 | } | |
1307 | ||
1308 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
070fb21e | 1309 | name += strlen(name) + 1) { |
f4415848 NJ |
1310 | ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name)); |
1311 | ||
1312 | if (!strncmp(name, XATTR_NAME_POSIX_ACL_ACCESS, | |
64b39f4a | 1313 | sizeof(XATTR_NAME_POSIX_ACL_ACCESS) - 1) || |
f4415848 | 1314 | !strncmp(name, XATTR_NAME_POSIX_ACL_DEFAULT, |
64b39f4a | 1315 | sizeof(XATTR_NAME_POSIX_ACL_DEFAULT) - 1)) { |
af34983e | 1316 | err = ksmbd_vfs_remove_xattr(user_ns, dentry, name); |
f4415848 NJ |
1317 | if (err) |
1318 | ksmbd_debug(SMB, | |
070fb21e | 1319 | "remove acl xattr failed : %s\n", name); |
f4415848 NJ |
1320 | } |
1321 | } | |
1322 | out: | |
79f6b11a | 1323 | kvfree(xattr_list); |
f4415848 NJ |
1324 | return err; |
1325 | } | |
1326 | ||
af34983e HL |
1327 | int ksmbd_vfs_remove_sd_xattrs(struct user_namespace *user_ns, |
1328 | struct dentry *dentry) | |
f4415848 NJ |
1329 | { |
1330 | char *name, *xattr_list = NULL; | |
1331 | ssize_t xattr_list_len; | |
1332 | int err = 0; | |
1333 | ||
1334 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
1335 | if (xattr_list_len < 0) { | |
1336 | goto out; | |
1337 | } else if (!xattr_list_len) { | |
1338 | ksmbd_debug(SMB, "empty xattr in the file\n"); | |
1339 | goto out; | |
1340 | } | |
1341 | ||
1342 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
1343 | name += strlen(name) + 1) { | |
1344 | ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name)); | |
1345 | ||
1346 | if (!strncmp(name, XATTR_NAME_SD, XATTR_NAME_SD_LEN)) { | |
af34983e | 1347 | err = ksmbd_vfs_remove_xattr(user_ns, dentry, name); |
f4415848 NJ |
1348 | if (err) |
1349 | ksmbd_debug(SMB, "remove xattr failed : %s\n", name); | |
1350 | } | |
1351 | } | |
1352 | out: | |
79f6b11a | 1353 | kvfree(xattr_list); |
f4415848 NJ |
1354 | return err; |
1355 | } | |
1356 | ||
af34983e HL |
1357 | static struct xattr_smb_acl *ksmbd_vfs_make_xattr_posix_acl(struct user_namespace *user_ns, |
1358 | struct inode *inode, | |
070fb21e | 1359 | int acl_type) |
f4415848 NJ |
1360 | { |
1361 | struct xattr_smb_acl *smb_acl = NULL; | |
1362 | struct posix_acl *posix_acls; | |
1363 | struct posix_acl_entry *pa_entry; | |
1364 | struct xattr_acl_entry *xa_entry; | |
1365 | int i; | |
1366 | ||
777cad16 NJ |
1367 | if (!IS_ENABLED(CONFIG_FS_POSIX_ACL)) |
1368 | return NULL; | |
1369 | ||
67d1c432 | 1370 | posix_acls = get_acl(inode, acl_type); |
f4415848 NJ |
1371 | if (!posix_acls) |
1372 | return NULL; | |
1373 | ||
1374 | smb_acl = kzalloc(sizeof(struct xattr_smb_acl) + | |
1375 | sizeof(struct xattr_acl_entry) * posix_acls->a_count, | |
1376 | GFP_KERNEL); | |
1377 | if (!smb_acl) | |
1378 | goto out; | |
1379 | ||
1380 | smb_acl->count = posix_acls->a_count; | |
1381 | pa_entry = posix_acls->a_entries; | |
1382 | xa_entry = smb_acl->entries; | |
1383 | for (i = 0; i < posix_acls->a_count; i++, pa_entry++, xa_entry++) { | |
1384 | switch (pa_entry->e_tag) { | |
1385 | case ACL_USER: | |
1386 | xa_entry->type = SMB_ACL_USER; | |
0e844efe | 1387 | xa_entry->uid = posix_acl_uid_translate(user_ns, pa_entry); |
f4415848 NJ |
1388 | break; |
1389 | case ACL_USER_OBJ: | |
1390 | xa_entry->type = SMB_ACL_USER_OBJ; | |
1391 | break; | |
1392 | case ACL_GROUP: | |
1393 | xa_entry->type = SMB_ACL_GROUP; | |
0e844efe | 1394 | xa_entry->gid = posix_acl_gid_translate(user_ns, pa_entry); |
f4415848 NJ |
1395 | break; |
1396 | case ACL_GROUP_OBJ: | |
1397 | xa_entry->type = SMB_ACL_GROUP_OBJ; | |
1398 | break; | |
1399 | case ACL_OTHER: | |
1400 | xa_entry->type = SMB_ACL_OTHER; | |
1401 | break; | |
1402 | case ACL_MASK: | |
1403 | xa_entry->type = SMB_ACL_MASK; | |
1404 | break; | |
1405 | default: | |
bde1694a | 1406 | pr_err("unknown type : 0x%x\n", pa_entry->e_tag); |
f4415848 NJ |
1407 | goto out; |
1408 | } | |
1409 | ||
1410 | if (pa_entry->e_perm & ACL_READ) | |
1411 | xa_entry->perm |= SMB_ACL_READ; | |
1412 | if (pa_entry->e_perm & ACL_WRITE) | |
1413 | xa_entry->perm |= SMB_ACL_WRITE; | |
1414 | if (pa_entry->e_perm & ACL_EXECUTE) | |
1415 | xa_entry->perm |= SMB_ACL_EXECUTE; | |
1416 | } | |
1417 | out: | |
1418 | posix_acl_release(posix_acls); | |
1419 | return smb_acl; | |
1420 | } | |
1421 | ||
af34983e HL |
1422 | int ksmbd_vfs_set_sd_xattr(struct ksmbd_conn *conn, |
1423 | struct user_namespace *user_ns, | |
1424 | struct dentry *dentry, | |
070fb21e | 1425 | struct smb_ntsd *pntsd, int len) |
f4415848 NJ |
1426 | { |
1427 | int rc; | |
1428 | struct ndr sd_ndr = {0}, acl_ndr = {0}; | |
1429 | struct xattr_ntacl acl = {0}; | |
1430 | struct xattr_smb_acl *smb_acl, *def_smb_acl = NULL; | |
fba08fa0 | 1431 | struct inode *inode = d_inode(dentry); |
f4415848 NJ |
1432 | |
1433 | acl.version = 4; | |
1434 | acl.hash_type = XATTR_SD_HASH_TYPE_SHA256; | |
fba08fa0 | 1435 | acl.current_time = ksmbd_UnixTimeToNT(current_time(inode)); |
f4415848 NJ |
1436 | |
1437 | memcpy(acl.desc, "posix_acl", 9); | |
1438 | acl.desc_len = 10; | |
1439 | ||
1440 | pntsd->osidoffset = | |
1441 | cpu_to_le32(le32_to_cpu(pntsd->osidoffset) + NDR_NTSD_OFFSETOF); | |
1442 | pntsd->gsidoffset = | |
1443 | cpu_to_le32(le32_to_cpu(pntsd->gsidoffset) + NDR_NTSD_OFFSETOF); | |
1444 | pntsd->dacloffset = | |
1445 | cpu_to_le32(le32_to_cpu(pntsd->dacloffset) + NDR_NTSD_OFFSETOF); | |
1446 | ||
1447 | acl.sd_buf = (char *)pntsd; | |
1448 | acl.sd_size = len; | |
1449 | ||
1450 | rc = ksmbd_gen_sd_hash(conn, acl.sd_buf, acl.sd_size, acl.hash); | |
1451 | if (rc) { | |
bde1694a | 1452 | pr_err("failed to generate hash for ndr acl\n"); |
f4415848 NJ |
1453 | return rc; |
1454 | } | |
1455 | ||
af34983e HL |
1456 | smb_acl = ksmbd_vfs_make_xattr_posix_acl(user_ns, inode, |
1457 | ACL_TYPE_ACCESS); | |
f4415848 | 1458 | if (S_ISDIR(inode->i_mode)) |
af34983e | 1459 | def_smb_acl = ksmbd_vfs_make_xattr_posix_acl(user_ns, inode, |
070fb21e | 1460 | ACL_TYPE_DEFAULT); |
f4415848 | 1461 | |
af34983e HL |
1462 | rc = ndr_encode_posix_acl(&acl_ndr, user_ns, inode, |
1463 | smb_acl, def_smb_acl); | |
f4415848 | 1464 | if (rc) { |
bde1694a | 1465 | pr_err("failed to encode ndr to posix acl\n"); |
f4415848 NJ |
1466 | goto out; |
1467 | } | |
1468 | ||
1469 | rc = ksmbd_gen_sd_hash(conn, acl_ndr.data, acl_ndr.offset, | |
070fb21e | 1470 | acl.posix_acl_hash); |
f4415848 | 1471 | if (rc) { |
bde1694a | 1472 | pr_err("failed to generate hash for ndr acl\n"); |
f4415848 NJ |
1473 | goto out; |
1474 | } | |
1475 | ||
1476 | rc = ndr_encode_v4_ntacl(&sd_ndr, &acl); | |
1477 | if (rc) { | |
bde1694a | 1478 | pr_err("failed to encode ndr to posix acl\n"); |
f4415848 NJ |
1479 | goto out; |
1480 | } | |
1481 | ||
af34983e HL |
1482 | rc = ksmbd_vfs_setxattr(user_ns, dentry, |
1483 | XATTR_NAME_SD, sd_ndr.data, | |
070fb21e | 1484 | sd_ndr.offset, 0); |
f4415848 | 1485 | if (rc < 0) |
bde1694a | 1486 | pr_err("Failed to store XATTR ntacl :%d\n", rc); |
f4415848 NJ |
1487 | |
1488 | kfree(sd_ndr.data); | |
1489 | out: | |
1490 | kfree(acl_ndr.data); | |
1491 | kfree(smb_acl); | |
1492 | kfree(def_smb_acl); | |
1493 | return rc; | |
1494 | } | |
1495 | ||
af34983e HL |
1496 | int ksmbd_vfs_get_sd_xattr(struct ksmbd_conn *conn, |
1497 | struct user_namespace *user_ns, | |
1498 | struct dentry *dentry, | |
070fb21e | 1499 | struct smb_ntsd **pntsd) |
f4415848 NJ |
1500 | { |
1501 | int rc; | |
1502 | struct ndr n; | |
78ad2c27 NJ |
1503 | struct inode *inode = d_inode(dentry); |
1504 | struct ndr acl_ndr = {0}; | |
1505 | struct xattr_ntacl acl; | |
1506 | struct xattr_smb_acl *smb_acl = NULL, *def_smb_acl = NULL; | |
1507 | __u8 cmp_hash[XATTR_SD_HASH_SIZE] = {0}; | |
f4415848 | 1508 | |
af34983e | 1509 | rc = ksmbd_vfs_getxattr(user_ns, dentry, XATTR_NAME_SD, &n.data); |
78ad2c27 NJ |
1510 | if (rc <= 0) |
1511 | return rc; | |
f4415848 | 1512 | |
78ad2c27 NJ |
1513 | n.length = rc; |
1514 | rc = ndr_decode_v4_ntacl(&n, &acl); | |
1515 | if (rc) | |
1516 | goto free_n_data; | |
f4415848 | 1517 | |
78ad2c27 NJ |
1518 | smb_acl = ksmbd_vfs_make_xattr_posix_acl(user_ns, inode, |
1519 | ACL_TYPE_ACCESS); | |
1520 | if (S_ISDIR(inode->i_mode)) | |
1521 | def_smb_acl = ksmbd_vfs_make_xattr_posix_acl(user_ns, inode, | |
1522 | ACL_TYPE_DEFAULT); | |
f4415848 | 1523 | |
78ad2c27 NJ |
1524 | rc = ndr_encode_posix_acl(&acl_ndr, user_ns, inode, smb_acl, |
1525 | def_smb_acl); | |
1526 | if (rc) { | |
1527 | pr_err("failed to encode ndr to posix acl\n"); | |
1528 | goto out_free; | |
1529 | } | |
f4415848 | 1530 | |
78ad2c27 NJ |
1531 | rc = ksmbd_gen_sd_hash(conn, acl_ndr.data, acl_ndr.offset, cmp_hash); |
1532 | if (rc) { | |
1533 | pr_err("failed to generate hash for ndr acl\n"); | |
1534 | goto out_free; | |
1535 | } | |
1536 | ||
1537 | if (memcmp(cmp_hash, acl.posix_acl_hash, XATTR_SD_HASH_SIZE)) { | |
1538 | pr_err("hash value diff\n"); | |
1539 | rc = -EINVAL; | |
1540 | goto out_free; | |
1541 | } | |
1542 | ||
1543 | *pntsd = acl.sd_buf; | |
1544 | (*pntsd)->osidoffset = cpu_to_le32(le32_to_cpu((*pntsd)->osidoffset) - | |
1545 | NDR_NTSD_OFFSETOF); | |
1546 | (*pntsd)->gsidoffset = cpu_to_le32(le32_to_cpu((*pntsd)->gsidoffset) - | |
1547 | NDR_NTSD_OFFSETOF); | |
1548 | (*pntsd)->dacloffset = cpu_to_le32(le32_to_cpu((*pntsd)->dacloffset) - | |
1549 | NDR_NTSD_OFFSETOF); | |
1550 | ||
1551 | rc = acl.sd_size; | |
1552 | out_free: | |
1553 | kfree(acl_ndr.data); | |
1554 | kfree(smb_acl); | |
1555 | kfree(def_smb_acl); | |
1556 | if (rc < 0) { | |
1557 | kfree(acl.sd_buf); | |
1558 | *pntsd = NULL; | |
f4415848 NJ |
1559 | } |
1560 | ||
78ad2c27 NJ |
1561 | free_n_data: |
1562 | kfree(n.data); | |
f4415848 NJ |
1563 | return rc; |
1564 | } | |
1565 | ||
af34983e HL |
1566 | int ksmbd_vfs_set_dos_attrib_xattr(struct user_namespace *user_ns, |
1567 | struct dentry *dentry, | |
070fb21e | 1568 | struct xattr_dos_attrib *da) |
f4415848 NJ |
1569 | { |
1570 | struct ndr n; | |
1571 | int err; | |
1572 | ||
1573 | err = ndr_encode_dos_attr(&n, da); | |
1574 | if (err) | |
1575 | return err; | |
1576 | ||
af34983e | 1577 | err = ksmbd_vfs_setxattr(user_ns, dentry, XATTR_NAME_DOS_ATTRIBUTE, |
070fb21e | 1578 | (void *)n.data, n.offset, 0); |
f4415848 NJ |
1579 | if (err) |
1580 | ksmbd_debug(SMB, "failed to store dos attribute in xattr\n"); | |
1581 | kfree(n.data); | |
1582 | ||
1583 | return err; | |
1584 | } | |
1585 | ||
af34983e HL |
1586 | int ksmbd_vfs_get_dos_attrib_xattr(struct user_namespace *user_ns, |
1587 | struct dentry *dentry, | |
070fb21e | 1588 | struct xattr_dos_attrib *da) |
f4415848 NJ |
1589 | { |
1590 | struct ndr n; | |
1591 | int err; | |
1592 | ||
af34983e | 1593 | err = ksmbd_vfs_getxattr(user_ns, dentry, XATTR_NAME_DOS_ATTRIBUTE, |
070fb21e | 1594 | (char **)&n.data); |
f4415848 NJ |
1595 | if (err > 0) { |
1596 | n.length = err; | |
1597 | if (ndr_decode_dos_attr(&n, da)) | |
1598 | err = -EINVAL; | |
79f6b11a | 1599 | kfree(n.data); |
64b39f4a | 1600 | } else { |
f4415848 | 1601 | ksmbd_debug(SMB, "failed to load dos attribute in xattr\n"); |
64b39f4a | 1602 | } |
f4415848 NJ |
1603 | |
1604 | return err; | |
1605 | } | |
1606 | ||
f4415848 NJ |
1607 | /** |
1608 | * ksmbd_vfs_init_kstat() - convert unix stat information to smb stat format | |
1609 | * @p: destination buffer | |
1610 | * @ksmbd_kstat: ksmbd kstat wrapper | |
1611 | */ | |
1612 | void *ksmbd_vfs_init_kstat(char **p, struct ksmbd_kstat *ksmbd_kstat) | |
1613 | { | |
1614 | struct file_directory_info *info = (struct file_directory_info *)(*p); | |
1615 | struct kstat *kstat = ksmbd_kstat->kstat; | |
1616 | u64 time; | |
1617 | ||
1618 | info->FileIndex = 0; | |
1619 | info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time); | |
1620 | time = ksmbd_UnixTimeToNT(kstat->atime); | |
1621 | info->LastAccessTime = cpu_to_le64(time); | |
1622 | time = ksmbd_UnixTimeToNT(kstat->mtime); | |
1623 | info->LastWriteTime = cpu_to_le64(time); | |
1624 | time = ksmbd_UnixTimeToNT(kstat->ctime); | |
1625 | info->ChangeTime = cpu_to_le64(time); | |
1626 | ||
1627 | if (ksmbd_kstat->file_attributes & ATTR_DIRECTORY_LE) { | |
1628 | info->EndOfFile = 0; | |
1629 | info->AllocationSize = 0; | |
1630 | } else { | |
1631 | info->EndOfFile = cpu_to_le64(kstat->size); | |
1632 | info->AllocationSize = cpu_to_le64(kstat->blocks << 9); | |
1633 | } | |
1634 | info->ExtFileAttributes = ksmbd_kstat->file_attributes; | |
1635 | ||
1636 | return info; | |
1637 | } | |
1638 | ||
af34983e HL |
1639 | int ksmbd_vfs_fill_dentry_attrs(struct ksmbd_work *work, |
1640 | struct user_namespace *user_ns, | |
1641 | struct dentry *dentry, | |
070fb21e | 1642 | struct ksmbd_kstat *ksmbd_kstat) |
f4415848 NJ |
1643 | { |
1644 | u64 time; | |
1645 | int rc; | |
1646 | ||
af34983e | 1647 | generic_fillattr(user_ns, d_inode(dentry), ksmbd_kstat->kstat); |
f4415848 NJ |
1648 | |
1649 | time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime); | |
1650 | ksmbd_kstat->create_time = time; | |
1651 | ||
1652 | /* | |
1653 | * set default value for the case that store dos attributes is not yes | |
1654 | * or that acl is disable in server's filesystem and the config is yes. | |
1655 | */ | |
1656 | if (S_ISDIR(ksmbd_kstat->kstat->mode)) | |
1657 | ksmbd_kstat->file_attributes = ATTR_DIRECTORY_LE; | |
1658 | else | |
1659 | ksmbd_kstat->file_attributes = ATTR_ARCHIVE_LE; | |
1660 | ||
1661 | if (test_share_config_flag(work->tcon->share_conf, | |
64b39f4a | 1662 | KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) { |
f4415848 NJ |
1663 | struct xattr_dos_attrib da; |
1664 | ||
af34983e | 1665 | rc = ksmbd_vfs_get_dos_attrib_xattr(user_ns, dentry, &da); |
f4415848 NJ |
1666 | if (rc > 0) { |
1667 | ksmbd_kstat->file_attributes = cpu_to_le32(da.attr); | |
1668 | ksmbd_kstat->create_time = da.create_time; | |
64b39f4a | 1669 | } else { |
f4415848 | 1670 | ksmbd_debug(VFS, "fail to load dos attribute.\n"); |
64b39f4a | 1671 | } |
f4415848 NJ |
1672 | } |
1673 | ||
1674 | return 0; | |
1675 | } | |
1676 | ||
af34983e HL |
1677 | ssize_t ksmbd_vfs_casexattr_len(struct user_namespace *user_ns, |
1678 | struct dentry *dentry, char *attr_name, | |
070fb21e | 1679 | int attr_name_len) |
f4415848 NJ |
1680 | { |
1681 | char *name, *xattr_list = NULL; | |
1682 | ssize_t value_len = -ENOENT, xattr_list_len; | |
1683 | ||
1684 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
1685 | if (xattr_list_len <= 0) | |
1686 | goto out; | |
1687 | ||
1688 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
1689 | name += strlen(name) + 1) { | |
1690 | ksmbd_debug(VFS, "%s, len %zd\n", name, strlen(name)); | |
1691 | if (strncasecmp(attr_name, name, attr_name_len)) | |
1692 | continue; | |
1693 | ||
af34983e | 1694 | value_len = ksmbd_vfs_xattr_len(user_ns, dentry, name); |
f4415848 NJ |
1695 | break; |
1696 | } | |
1697 | ||
1698 | out: | |
79f6b11a | 1699 | kvfree(xattr_list); |
f4415848 NJ |
1700 | return value_len; |
1701 | } | |
1702 | ||
64b39f4a | 1703 | int ksmbd_vfs_xattr_stream_name(char *stream_name, char **xattr_stream_name, |
070fb21e | 1704 | size_t *xattr_stream_name_size, int s_type) |
f4415848 | 1705 | { |
07781de9 | 1706 | char *type, *buf; |
f4415848 NJ |
1707 | |
1708 | if (s_type == DIR_STREAM) | |
1709 | type = ":$INDEX_ALLOCATION"; | |
1710 | else | |
1711 | type = ":$DATA"; | |
1712 | ||
07781de9 DC |
1713 | buf = kasprintf(GFP_KERNEL, "%s%s%s", |
1714 | XATTR_NAME_STREAM, stream_name, type); | |
1715 | if (!buf) | |
f4415848 NJ |
1716 | return -ENOMEM; |
1717 | ||
07781de9 DC |
1718 | *xattr_stream_name = buf; |
1719 | *xattr_stream_name_size = strlen(buf) + 1; | |
f4415848 NJ |
1720 | |
1721 | return 0; | |
1722 | } | |
1723 | ||
f4415848 | 1724 | int ksmbd_vfs_copy_file_ranges(struct ksmbd_work *work, |
070fb21e NJ |
1725 | struct ksmbd_file *src_fp, |
1726 | struct ksmbd_file *dst_fp, | |
1727 | struct srv_copychunk *chunks, | |
1728 | unsigned int chunk_count, | |
1729 | unsigned int *chunk_count_written, | |
1730 | unsigned int *chunk_size_written, | |
1731 | loff_t *total_size_written) | |
f4415848 NJ |
1732 | { |
1733 | unsigned int i; | |
1734 | loff_t src_off, dst_off, src_file_size; | |
1735 | size_t len; | |
1736 | int ret; | |
1737 | ||
1738 | *chunk_count_written = 0; | |
1739 | *chunk_size_written = 0; | |
1740 | *total_size_written = 0; | |
1741 | ||
1742 | if (!(src_fp->daccess & (FILE_READ_DATA_LE | FILE_EXECUTE_LE))) { | |
493fa2fb | 1743 | pr_err("no right to read(%pd)\n", src_fp->filp->f_path.dentry); |
f4415848 NJ |
1744 | return -EACCES; |
1745 | } | |
1746 | if (!(dst_fp->daccess & (FILE_WRITE_DATA_LE | FILE_APPEND_DATA_LE))) { | |
493fa2fb | 1747 | pr_err("no right to write(%pd)\n", dst_fp->filp->f_path.dentry); |
f4415848 NJ |
1748 | return -EACCES; |
1749 | } | |
1750 | ||
1751 | if (ksmbd_stream_fd(src_fp) || ksmbd_stream_fd(dst_fp)) | |
1752 | return -EBADF; | |
1753 | ||
1754 | smb_break_all_levII_oplock(work, dst_fp, 1); | |
1755 | ||
c36fca86 NJ |
1756 | if (!work->tcon->posix_extensions) { |
1757 | for (i = 0; i < chunk_count; i++) { | |
1758 | src_off = le64_to_cpu(chunks[i].SourceOffset); | |
1759 | dst_off = le64_to_cpu(chunks[i].TargetOffset); | |
1760 | len = le32_to_cpu(chunks[i].Length); | |
1761 | ||
1762 | if (check_lock_range(src_fp->filp, src_off, | |
64b39f4a | 1763 | src_off + len - 1, READ)) |
c36fca86 NJ |
1764 | return -EAGAIN; |
1765 | if (check_lock_range(dst_fp->filp, dst_off, | |
64b39f4a | 1766 | dst_off + len - 1, WRITE)) |
c36fca86 NJ |
1767 | return -EAGAIN; |
1768 | } | |
f4415848 NJ |
1769 | } |
1770 | ||
1771 | src_file_size = i_size_read(file_inode(src_fp->filp)); | |
1772 | ||
1773 | for (i = 0; i < chunk_count; i++) { | |
1774 | src_off = le64_to_cpu(chunks[i].SourceOffset); | |
1775 | dst_off = le64_to_cpu(chunks[i].TargetOffset); | |
1776 | len = le32_to_cpu(chunks[i].Length); | |
1777 | ||
1778 | if (src_off + len > src_file_size) | |
1779 | return -E2BIG; | |
1780 | ||
f8524776 NJ |
1781 | ret = vfs_copy_file_range(src_fp->filp, src_off, |
1782 | dst_fp->filp, dst_off, len, 0); | |
f4415848 NJ |
1783 | if (ret < 0) |
1784 | return ret; | |
1785 | ||
1786 | *chunk_count_written += 1; | |
1787 | *total_size_written += ret; | |
1788 | } | |
1789 | return 0; | |
1790 | } | |
1791 | ||
45a64e8b | 1792 | void ksmbd_vfs_posix_lock_wait(struct file_lock *flock) |
f4415848 | 1793 | { |
45a64e8b | 1794 | wait_event(flock->fl_wait, !flock->fl_blocker); |
f4415848 NJ |
1795 | } |
1796 | ||
1797 | int ksmbd_vfs_posix_lock_wait_timeout(struct file_lock *flock, long timeout) | |
1798 | { | |
1799 | return wait_event_interruptible_timeout(flock->fl_wait, | |
1800 | !flock->fl_blocker, | |
1801 | timeout); | |
1802 | } | |
1803 | ||
1804 | void ksmbd_vfs_posix_lock_unblock(struct file_lock *flock) | |
1805 | { | |
1806 | locks_delete_block(flock); | |
1807 | } | |
1808 | ||
af34983e HL |
1809 | int ksmbd_vfs_set_init_posix_acl(struct user_namespace *user_ns, |
1810 | struct inode *inode) | |
f4415848 NJ |
1811 | { |
1812 | struct posix_acl_state acl_state; | |
1813 | struct posix_acl *acls; | |
1814 | int rc; | |
1815 | ||
777cad16 NJ |
1816 | if (!IS_ENABLED(CONFIG_FS_POSIX_ACL)) |
1817 | return -EOPNOTSUPP; | |
1818 | ||
f4415848 NJ |
1819 | ksmbd_debug(SMB, "Set posix acls\n"); |
1820 | rc = init_acl_state(&acl_state, 1); | |
1821 | if (rc) | |
1822 | return rc; | |
1823 | ||
1824 | /* Set default owner group */ | |
1825 | acl_state.owner.allow = (inode->i_mode & 0700) >> 6; | |
1826 | acl_state.group.allow = (inode->i_mode & 0070) >> 3; | |
1827 | acl_state.other.allow = inode->i_mode & 0007; | |
1828 | acl_state.users->aces[acl_state.users->n].uid = inode->i_uid; | |
1829 | acl_state.users->aces[acl_state.users->n++].perms.allow = | |
1830 | acl_state.owner.allow; | |
1831 | acl_state.groups->aces[acl_state.groups->n].gid = inode->i_gid; | |
1832 | acl_state.groups->aces[acl_state.groups->n++].perms.allow = | |
1833 | acl_state.group.allow; | |
1834 | acl_state.mask.allow = 0x07; | |
1835 | ||
67d1c432 | 1836 | acls = posix_acl_alloc(6, GFP_KERNEL); |
f4415848 NJ |
1837 | if (!acls) { |
1838 | free_acl_state(&acl_state); | |
1839 | return -ENOMEM; | |
1840 | } | |
1841 | posix_state_to_acl(&acl_state, acls->a_entries); | |
af34983e | 1842 | rc = set_posix_acl(user_ns, inode, ACL_TYPE_ACCESS, acls); |
f4415848 NJ |
1843 | if (rc < 0) |
1844 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_ACCESS) failed, rc : %d\n", | |
070fb21e | 1845 | rc); |
f4415848 NJ |
1846 | else if (S_ISDIR(inode->i_mode)) { |
1847 | posix_state_to_acl(&acl_state, acls->a_entries); | |
af34983e | 1848 | rc = set_posix_acl(user_ns, inode, ACL_TYPE_DEFAULT, |
67d1c432 | 1849 | acls); |
f4415848 NJ |
1850 | if (rc < 0) |
1851 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_DEFAULT) failed, rc : %d\n", | |
070fb21e | 1852 | rc); |
f4415848 NJ |
1853 | } |
1854 | free_acl_state(&acl_state); | |
1855 | posix_acl_release(acls); | |
1856 | return rc; | |
1857 | } | |
1858 | ||
af34983e HL |
1859 | int ksmbd_vfs_inherit_posix_acl(struct user_namespace *user_ns, |
1860 | struct inode *inode, struct inode *parent_inode) | |
f4415848 NJ |
1861 | { |
1862 | struct posix_acl *acls; | |
1863 | struct posix_acl_entry *pace; | |
1864 | int rc, i; | |
1865 | ||
777cad16 NJ |
1866 | if (!IS_ENABLED(CONFIG_FS_POSIX_ACL)) |
1867 | return -EOPNOTSUPP; | |
1868 | ||
67d1c432 | 1869 | acls = get_acl(parent_inode, ACL_TYPE_DEFAULT); |
f4415848 NJ |
1870 | if (!acls) |
1871 | return -ENOENT; | |
1872 | pace = acls->a_entries; | |
1873 | ||
1874 | for (i = 0; i < acls->a_count; i++, pace++) { | |
1875 | if (pace->e_tag == ACL_MASK) { | |
1876 | pace->e_perm = 0x07; | |
1877 | break; | |
1878 | } | |
1879 | } | |
1880 | ||
af34983e | 1881 | rc = set_posix_acl(user_ns, inode, ACL_TYPE_ACCESS, acls); |
f4415848 NJ |
1882 | if (rc < 0) |
1883 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_ACCESS) failed, rc : %d\n", | |
070fb21e | 1884 | rc); |
f4415848 | 1885 | if (S_ISDIR(inode->i_mode)) { |
af34983e | 1886 | rc = set_posix_acl(user_ns, inode, ACL_TYPE_DEFAULT, |
67d1c432 | 1887 | acls); |
f4415848 NJ |
1888 | if (rc < 0) |
1889 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_DEFAULT) failed, rc : %d\n", | |
070fb21e | 1890 | rc); |
f4415848 NJ |
1891 | } |
1892 | posix_acl_release(acls); | |
1893 | return rc; | |
1894 | } |