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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> | |
f4415848 NJ |
14 | #include <linux/fsnotify.h> |
15 | #include <linux/dcache.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/vmalloc.h> | |
18 | #include <linux/sched/xacct.h> | |
19 | #include <linux/crc32c.h> | |
20 | ||
265fd199 HL |
21 | #include "../internal.h" /* for vfs_path_lookup */ |
22 | ||
f4415848 NJ |
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 | ||
39 | static char *extract_last_component(char *path) | |
40 | { | |
41 | char *p = strrchr(path, '/'); | |
42 | ||
43 | if (p && p[1] != '\0') { | |
44 | *p = '\0'; | |
45 | p++; | |
46 | } else { | |
47 | p = NULL; | |
f4415848 NJ |
48 | } |
49 | return p; | |
50 | } | |
51 | ||
f4415848 | 52 | static void ksmbd_vfs_inherit_owner(struct ksmbd_work *work, |
070fb21e NJ |
53 | struct inode *parent_inode, |
54 | struct inode *inode) | |
f4415848 NJ |
55 | { |
56 | if (!test_share_config_flag(work->tcon->share_conf, | |
64b39f4a | 57 | KSMBD_SHARE_FLAG_INHERIT_OWNER)) |
f4415848 NJ |
58 | return; |
59 | ||
60 | i_uid_write(inode, i_uid_read(parent_inode)); | |
61 | } | |
62 | ||
333111a6 HL |
63 | /** |
64 | * ksmbd_vfs_lock_parent() - lock parent dentry if it is stable | |
65 | * | |
66 | * the parent dentry got by dget_parent or @parent could be | |
67 | * unstable, we try to lock a parent inode and lookup the | |
68 | * child dentry again. | |
69 | * | |
70 | * the reference count of @parent isn't incremented. | |
71 | */ | |
da1e7ada CB |
72 | int ksmbd_vfs_lock_parent(struct user_namespace *user_ns, struct dentry *parent, |
73 | struct dentry *child) | |
333111a6 HL |
74 | { |
75 | struct dentry *dentry; | |
76 | int ret = 0; | |
77 | ||
78 | inode_lock_nested(d_inode(parent), I_MUTEX_PARENT); | |
da1e7ada CB |
79 | dentry = lookup_one(user_ns, child->d_name.name, parent, |
80 | child->d_name.len); | |
333111a6 HL |
81 | if (IS_ERR(dentry)) { |
82 | ret = PTR_ERR(dentry); | |
83 | goto out_err; | |
84 | } | |
85 | ||
86 | if (dentry != child) { | |
87 | ret = -ESTALE; | |
88 | dput(dentry); | |
89 | goto out_err; | |
90 | } | |
91 | ||
92 | dput(dentry); | |
93 | return 0; | |
94 | out_err: | |
95 | inode_unlock(d_inode(parent)); | |
96 | return ret; | |
97 | } | |
98 | ||
af34983e HL |
99 | int ksmbd_vfs_may_delete(struct user_namespace *user_ns, |
100 | struct dentry *dentry) | |
f4415848 | 101 | { |
6c5e36d1 HL |
102 | struct dentry *parent; |
103 | int ret; | |
333111a6 | 104 | |
6c5e36d1 | 105 | parent = dget_parent(dentry); |
da1e7ada | 106 | ret = ksmbd_vfs_lock_parent(user_ns, parent, dentry); |
6c5e36d1 | 107 | if (ret) { |
f4415848 | 108 | dput(parent); |
6c5e36d1 | 109 | return ret; |
f4415848 | 110 | } |
6c5e36d1 | 111 | |
af34983e | 112 | ret = inode_permission(user_ns, d_inode(parent), |
6c5e36d1 HL |
113 | MAY_EXEC | MAY_WRITE); |
114 | ||
115 | inode_unlock(d_inode(parent)); | |
116 | dput(parent); | |
ff1d5727 | 117 | return ret; |
f4415848 NJ |
118 | } |
119 | ||
af34983e HL |
120 | int ksmbd_vfs_query_maximal_access(struct user_namespace *user_ns, |
121 | struct dentry *dentry, __le32 *daccess) | |
f4415848 | 122 | { |
333111a6 | 123 | struct dentry *parent; |
ff1d5727 | 124 | int ret = 0; |
f4415848 NJ |
125 | |
126 | *daccess = cpu_to_le32(FILE_READ_ATTRIBUTES | READ_CONTROL); | |
127 | ||
af34983e | 128 | if (!inode_permission(user_ns, d_inode(dentry), MAY_OPEN | MAY_WRITE)) |
f4415848 NJ |
129 | *daccess |= cpu_to_le32(WRITE_DAC | WRITE_OWNER | SYNCHRONIZE | |
130 | FILE_WRITE_DATA | FILE_APPEND_DATA | | |
131 | FILE_WRITE_EA | FILE_WRITE_ATTRIBUTES | | |
132 | FILE_DELETE_CHILD); | |
133 | ||
af34983e | 134 | if (!inode_permission(user_ns, d_inode(dentry), MAY_OPEN | MAY_READ)) |
f4415848 NJ |
135 | *daccess |= FILE_READ_DATA_LE | FILE_READ_EA_LE; |
136 | ||
af34983e | 137 | if (!inode_permission(user_ns, d_inode(dentry), MAY_OPEN | MAY_EXEC)) |
f4415848 NJ |
138 | *daccess |= FILE_EXECUTE_LE; |
139 | ||
140 | parent = dget_parent(dentry); | |
da1e7ada | 141 | ret = ksmbd_vfs_lock_parent(user_ns, parent, dentry); |
333111a6 HL |
142 | if (ret) { |
143 | dput(parent); | |
144 | return ret; | |
ff1d5727 | 145 | } |
f4415848 | 146 | |
af34983e | 147 | if (!inode_permission(user_ns, d_inode(parent), MAY_EXEC | MAY_WRITE)) |
f4415848 | 148 | *daccess |= FILE_DELETE_LE; |
ff1d5727 | 149 | |
ff1d5727 | 150 | inode_unlock(d_inode(parent)); |
f4415848 | 151 | dput(parent); |
ff1d5727 | 152 | return ret; |
f4415848 NJ |
153 | } |
154 | ||
f4415848 NJ |
155 | /** |
156 | * ksmbd_vfs_create() - vfs helper for smb create file | |
157 | * @work: work | |
265fd199 | 158 | * @name: file name that is relative to share |
f4415848 NJ |
159 | * @mode: file create mode |
160 | * | |
161 | * Return: 0 on success, otherwise error | |
162 | */ | |
64b39f4a | 163 | int ksmbd_vfs_create(struct ksmbd_work *work, const char *name, umode_t mode) |
f4415848 NJ |
164 | { |
165 | struct path path; | |
166 | struct dentry *dentry; | |
167 | int err; | |
168 | ||
265fd199 HL |
169 | dentry = ksmbd_vfs_kern_path_create(work, name, |
170 | LOOKUP_NO_SYMLINKS, &path); | |
f4415848 NJ |
171 | if (IS_ERR(dentry)) { |
172 | err = PTR_ERR(dentry); | |
173 | if (err != -ENOENT) | |
bde1694a NJ |
174 | pr_err("path create failed for %s, err %d\n", |
175 | name, err); | |
f4415848 NJ |
176 | return err; |
177 | } | |
178 | ||
179 | mode |= S_IFREG; | |
af34983e HL |
180 | err = vfs_create(mnt_user_ns(path.mnt), d_inode(path.dentry), |
181 | dentry, mode, true); | |
f4415848 NJ |
182 | if (!err) { |
183 | ksmbd_vfs_inherit_owner(work, d_inode(path.dentry), | |
070fb21e | 184 | d_inode(dentry)); |
f4415848 | 185 | } else { |
bde1694a | 186 | pr_err("File(%s): creation failed (err:%d)\n", name, err); |
f4415848 NJ |
187 | } |
188 | done_path_create(&path, dentry); | |
189 | return err; | |
190 | } | |
191 | ||
192 | /** | |
193 | * ksmbd_vfs_mkdir() - vfs helper for smb create directory | |
194 | * @work: work | |
265fd199 | 195 | * @name: directory name that is relative to share |
f4415848 NJ |
196 | * @mode: directory create mode |
197 | * | |
198 | * Return: 0 on success, otherwise error | |
199 | */ | |
64b39f4a | 200 | int ksmbd_vfs_mkdir(struct ksmbd_work *work, const char *name, umode_t mode) |
f4415848 | 201 | { |
da1e7ada | 202 | struct user_namespace *user_ns; |
f4415848 NJ |
203 | struct path path; |
204 | struct dentry *dentry; | |
205 | int err; | |
206 | ||
265fd199 HL |
207 | dentry = ksmbd_vfs_kern_path_create(work, name, |
208 | LOOKUP_NO_SYMLINKS | LOOKUP_DIRECTORY, | |
209 | &path); | |
f4415848 NJ |
210 | if (IS_ERR(dentry)) { |
211 | err = PTR_ERR(dentry); | |
212 | if (err != -EEXIST) | |
213 | ksmbd_debug(VFS, "path create failed for %s, err %d\n", | |
070fb21e | 214 | name, err); |
f4415848 NJ |
215 | return err; |
216 | } | |
217 | ||
da1e7ada | 218 | user_ns = mnt_user_ns(path.mnt); |
f4415848 | 219 | mode |= S_IFDIR; |
da1e7ada | 220 | err = vfs_mkdir(user_ns, d_inode(path.dentry), dentry, mode); |
a2d6321b | 221 | if (err) { |
16370235 | 222 | goto out; |
a2d6321b | 223 | } else if (d_unhashed(dentry)) { |
16370235 HL |
224 | struct dentry *d; |
225 | ||
da1e7ada CB |
226 | d = lookup_one(user_ns, dentry->d_name.name, dentry->d_parent, |
227 | dentry->d_name.len); | |
16370235 HL |
228 | if (IS_ERR(d)) { |
229 | err = PTR_ERR(d); | |
230 | goto out; | |
231 | } | |
232 | if (unlikely(d_is_negative(d))) { | |
233 | dput(d); | |
234 | err = -ENOENT; | |
235 | goto out; | |
236 | } | |
237 | ||
070fb21e | 238 | ksmbd_vfs_inherit_owner(work, d_inode(path.dentry), d_inode(d)); |
16370235 | 239 | dput(d); |
64b39f4a | 240 | } |
16370235 | 241 | out: |
f4415848 | 242 | done_path_create(&path, dentry); |
16370235 | 243 | if (err) |
bde1694a | 244 | pr_err("mkdir(%s): creation failed (err:%d)\n", name, err); |
f4415848 NJ |
245 | return err; |
246 | } | |
247 | ||
af34983e HL |
248 | static ssize_t ksmbd_vfs_getcasexattr(struct user_namespace *user_ns, |
249 | struct dentry *dentry, char *attr_name, | |
070fb21e | 250 | int attr_name_len, char **attr_value) |
f4415848 NJ |
251 | { |
252 | char *name, *xattr_list = NULL; | |
253 | ssize_t value_len = -ENOENT, xattr_list_len; | |
254 | ||
255 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
256 | if (xattr_list_len <= 0) | |
257 | goto out; | |
258 | ||
259 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
260 | name += strlen(name) + 1) { | |
261 | ksmbd_debug(VFS, "%s, len %zd\n", name, strlen(name)); | |
262 | if (strncasecmp(attr_name, name, attr_name_len)) | |
263 | continue; | |
264 | ||
af34983e HL |
265 | value_len = ksmbd_vfs_getxattr(user_ns, |
266 | dentry, | |
f4415848 NJ |
267 | name, |
268 | attr_value); | |
269 | if (value_len < 0) | |
bde1694a | 270 | pr_err("failed to get xattr in file\n"); |
f4415848 NJ |
271 | break; |
272 | } | |
273 | ||
274 | out: | |
79f6b11a | 275 | kvfree(xattr_list); |
f4415848 NJ |
276 | return value_len; |
277 | } | |
278 | ||
279 | static int ksmbd_vfs_stream_read(struct ksmbd_file *fp, char *buf, loff_t *pos, | |
070fb21e | 280 | size_t count) |
f4415848 NJ |
281 | { |
282 | ssize_t v_len; | |
283 | char *stream_buf = NULL; | |
f4415848 NJ |
284 | |
285 | ksmbd_debug(VFS, "read stream data pos : %llu, count : %zd\n", | |
070fb21e | 286 | *pos, count); |
f4415848 | 287 | |
af34983e HL |
288 | v_len = ksmbd_vfs_getcasexattr(file_mnt_user_ns(fp->filp), |
289 | fp->filp->f_path.dentry, | |
f4415848 NJ |
290 | fp->stream.name, |
291 | fp->stream.size, | |
292 | &stream_buf); | |
fd6de099 YY |
293 | if ((int)v_len <= 0) |
294 | return (int)v_len; | |
f4415848 | 295 | |
2ae1a6cc NJ |
296 | if (v_len <= *pos) { |
297 | count = -EINVAL; | |
298 | goto free_buf; | |
299 | } | |
300 | ||
301 | if (v_len - *pos < count) | |
302 | count = v_len - *pos; | |
303 | ||
f4415848 | 304 | memcpy(buf, &stream_buf[*pos], count); |
2ae1a6cc NJ |
305 | |
306 | free_buf: | |
673b9ba7 | 307 | kvfree(stream_buf); |
2ae1a6cc | 308 | return count; |
f4415848 NJ |
309 | } |
310 | ||
311 | /** | |
312 | * check_lock_range() - vfs helper for smb byte range file locking | |
313 | * @filp: the file to apply the lock to | |
314 | * @start: lock start byte offset | |
315 | * @end: lock end byte offset | |
316 | * @type: byte range type read/write | |
317 | * | |
318 | * Return: 0 on success, otherwise error | |
319 | */ | |
64b39f4a | 320 | static int check_lock_range(struct file *filp, loff_t start, loff_t end, |
070fb21e | 321 | unsigned char type) |
f4415848 NJ |
322 | { |
323 | struct file_lock *flock; | |
324 | struct file_lock_context *ctx = file_inode(filp)->i_flctx; | |
325 | int error = 0; | |
326 | ||
327 | if (!ctx || list_empty_careful(&ctx->flc_posix)) | |
328 | return 0; | |
329 | ||
330 | spin_lock(&ctx->flc_lock); | |
331 | list_for_each_entry(flock, &ctx->flc_posix, fl_list) { | |
332 | /* check conflict locks */ | |
333 | if (flock->fl_end >= start && end >= flock->fl_start) { | |
334 | if (flock->fl_type == F_RDLCK) { | |
335 | if (type == WRITE) { | |
bde1694a | 336 | pr_err("not allow write by shared lock\n"); |
f4415848 NJ |
337 | error = 1; |
338 | goto out; | |
339 | } | |
340 | } else if (flock->fl_type == F_WRLCK) { | |
341 | /* check owner in lock */ | |
342 | if (flock->fl_file != filp) { | |
343 | error = 1; | |
bde1694a | 344 | pr_err("not allow rw access by exclusive lock from other opens\n"); |
f4415848 NJ |
345 | goto out; |
346 | } | |
347 | } | |
348 | } | |
349 | } | |
350 | out: | |
351 | spin_unlock(&ctx->flc_lock); | |
352 | return error; | |
353 | } | |
354 | ||
355 | /** | |
356 | * ksmbd_vfs_read() - vfs helper for smb file read | |
357 | * @work: smb work | |
358 | * @fid: file id of open file | |
359 | * @count: read byte count | |
360 | * @pos: file pos | |
361 | * | |
362 | * Return: number of read bytes on success, otherwise error | |
363 | */ | |
64b39f4a | 364 | int ksmbd_vfs_read(struct ksmbd_work *work, struct ksmbd_file *fp, size_t count, |
070fb21e | 365 | loff_t *pos) |
f4415848 | 366 | { |
afa8f016 | 367 | struct file *filp = fp->filp; |
f4415848 | 368 | ssize_t nbytes = 0; |
afa8f016 NJ |
369 | char *rbuf = work->aux_payload_buf; |
370 | struct inode *inode = file_inode(filp); | |
f4415848 | 371 | |
f4415848 NJ |
372 | if (S_ISDIR(inode->i_mode)) |
373 | return -EISDIR; | |
374 | ||
375 | if (unlikely(count == 0)) | |
376 | return 0; | |
377 | ||
378 | if (work->conn->connection_type) { | |
379 | if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_EXECUTE_LE))) { | |
493fa2fb NJ |
380 | pr_err("no right to read(%pd)\n", |
381 | fp->filp->f_path.dentry); | |
f4415848 NJ |
382 | return -EACCES; |
383 | } | |
384 | } | |
385 | ||
386 | if (ksmbd_stream_fd(fp)) | |
387 | return ksmbd_vfs_stream_read(fp, rbuf, pos, count); | |
388 | ||
c36fca86 NJ |
389 | if (!work->tcon->posix_extensions) { |
390 | int ret; | |
391 | ||
070fb21e | 392 | ret = check_lock_range(filp, *pos, *pos + count - 1, READ); |
c36fca86 | 393 | if (ret) { |
bde1694a | 394 | pr_err("unable to read due to lock\n"); |
c36fca86 NJ |
395 | return -EAGAIN; |
396 | } | |
f4415848 NJ |
397 | } |
398 | ||
399 | nbytes = kernel_read(filp, rbuf, count, pos); | |
400 | if (nbytes < 0) { | |
50f500b7 | 401 | pr_err("smb read failed, err = %zd\n", nbytes); |
f4415848 NJ |
402 | return nbytes; |
403 | } | |
404 | ||
405 | filp->f_pos = *pos; | |
406 | return nbytes; | |
407 | } | |
408 | ||
409 | static int ksmbd_vfs_stream_write(struct ksmbd_file *fp, char *buf, loff_t *pos, | |
070fb21e | 410 | size_t count) |
f4415848 NJ |
411 | { |
412 | char *stream_buf = NULL, *wbuf; | |
465d7204 | 413 | struct user_namespace *user_ns = file_mnt_user_ns(fp->filp); |
f4415848 NJ |
414 | size_t size, v_len; |
415 | int err = 0; | |
416 | ||
417 | ksmbd_debug(VFS, "write stream data pos : %llu, count : %zd\n", | |
070fb21e | 418 | *pos, count); |
f4415848 NJ |
419 | |
420 | size = *pos + count; | |
421 | if (size > XATTR_SIZE_MAX) { | |
422 | size = XATTR_SIZE_MAX; | |
423 | count = (*pos + count) - XATTR_SIZE_MAX; | |
424 | } | |
425 | ||
465d7204 | 426 | v_len = ksmbd_vfs_getcasexattr(user_ns, |
af34983e | 427 | fp->filp->f_path.dentry, |
f4415848 NJ |
428 | fp->stream.name, |
429 | fp->stream.size, | |
430 | &stream_buf); | |
fd6de099 | 431 | if ((int)v_len < 0) { |
bde1694a | 432 | pr_err("not found stream in xattr : %zd\n", v_len); |
fd6de099 | 433 | err = (int)v_len; |
f4415848 NJ |
434 | goto out; |
435 | } | |
436 | ||
437 | if (v_len < size) { | |
79f6b11a | 438 | wbuf = kvmalloc(size, GFP_KERNEL | __GFP_ZERO); |
f4415848 NJ |
439 | if (!wbuf) { |
440 | err = -ENOMEM; | |
441 | goto out; | |
442 | } | |
443 | ||
444 | if (v_len > 0) | |
445 | memcpy(wbuf, stream_buf, v_len); | |
113ef68d | 446 | kvfree(stream_buf); |
f4415848 NJ |
447 | stream_buf = wbuf; |
448 | } | |
449 | ||
450 | memcpy(&stream_buf[*pos], buf, count); | |
451 | ||
465d7204 | 452 | err = ksmbd_vfs_setxattr(user_ns, |
af34983e | 453 | fp->filp->f_path.dentry, |
f4415848 NJ |
454 | fp->stream.name, |
455 | (void *)stream_buf, | |
456 | size, | |
457 | 0); | |
458 | if (err < 0) | |
459 | goto out; | |
460 | ||
461 | fp->filp->f_pos = *pos; | |
462 | err = 0; | |
463 | out: | |
79f6b11a | 464 | kvfree(stream_buf); |
f4415848 NJ |
465 | return err; |
466 | } | |
467 | ||
468 | /** | |
469 | * ksmbd_vfs_write() - vfs helper for smb file write | |
470 | * @work: work | |
471 | * @fid: file id of open file | |
472 | * @buf: buf containing data for writing | |
473 | * @count: read byte count | |
474 | * @pos: file pos | |
475 | * @sync: fsync after write | |
476 | * @written: number of bytes written | |
477 | * | |
478 | * Return: 0 on success, otherwise error | |
479 | */ | |
480 | int ksmbd_vfs_write(struct ksmbd_work *work, struct ksmbd_file *fp, | |
070fb21e NJ |
481 | char *buf, size_t count, loff_t *pos, bool sync, |
482 | ssize_t *written) | |
f4415848 | 483 | { |
f4415848 NJ |
484 | struct file *filp; |
485 | loff_t offset = *pos; | |
486 | int err = 0; | |
487 | ||
af7c39d9 | 488 | if (work->conn->connection_type) { |
f4415848 | 489 | if (!(fp->daccess & FILE_WRITE_DATA_LE)) { |
493fa2fb NJ |
490 | pr_err("no right to write(%pd)\n", |
491 | fp->filp->f_path.dentry); | |
f4415848 NJ |
492 | err = -EACCES; |
493 | goto out; | |
494 | } | |
495 | } | |
496 | ||
497 | filp = fp->filp; | |
498 | ||
499 | if (ksmbd_stream_fd(fp)) { | |
500 | err = ksmbd_vfs_stream_write(fp, buf, pos, count); | |
501 | if (!err) | |
502 | *written = count; | |
503 | goto out; | |
504 | } | |
505 | ||
c36fca86 NJ |
506 | if (!work->tcon->posix_extensions) { |
507 | err = check_lock_range(filp, *pos, *pos + count - 1, WRITE); | |
508 | if (err) { | |
bde1694a | 509 | pr_err("unable to write due to lock\n"); |
c36fca86 NJ |
510 | err = -EAGAIN; |
511 | goto out; | |
512 | } | |
f4415848 NJ |
513 | } |
514 | ||
515 | /* Do we need to break any of a levelII oplock? */ | |
516 | smb_break_all_levII_oplock(work, fp, 1); | |
517 | ||
518 | err = kernel_write(filp, buf, count, pos); | |
519 | if (err < 0) { | |
520 | ksmbd_debug(VFS, "smb write failed, err = %d\n", err); | |
521 | goto out; | |
522 | } | |
523 | ||
524 | filp->f_pos = *pos; | |
525 | *written = err; | |
526 | err = 0; | |
527 | if (sync) { | |
528 | err = vfs_fsync_range(filp, offset, offset + *written, 0); | |
529 | if (err < 0) | |
493fa2fb NJ |
530 | pr_err("fsync failed for filename = %pd, err = %d\n", |
531 | fp->filp->f_path.dentry, err); | |
f4415848 NJ |
532 | } |
533 | ||
534 | out: | |
535 | return err; | |
536 | } | |
537 | ||
538 | /** | |
539 | * ksmbd_vfs_getattr() - vfs helper for smb getattr | |
540 | * @work: work | |
541 | * @fid: file id of open file | |
542 | * @attrs: inode attributes | |
543 | * | |
544 | * Return: 0 on success, otherwise error | |
545 | */ | |
546 | int ksmbd_vfs_getattr(struct path *path, struct kstat *stat) | |
547 | { | |
548 | int err; | |
549 | ||
550 | err = vfs_getattr(path, stat, STATX_BTIME, AT_STATX_SYNC_AS_STAT); | |
551 | if (err) | |
bde1694a | 552 | pr_err("getattr failed, err %d\n", err); |
f4415848 NJ |
553 | return err; |
554 | } | |
555 | ||
556 | /** | |
557 | * ksmbd_vfs_fsync() - vfs helper for smb fsync | |
558 | * @work: work | |
559 | * @fid: file id of open file | |
560 | * | |
561 | * Return: 0 on success, otherwise error | |
562 | */ | |
64b39f4a | 563 | int ksmbd_vfs_fsync(struct ksmbd_work *work, u64 fid, u64 p_id) |
f4415848 NJ |
564 | { |
565 | struct ksmbd_file *fp; | |
566 | int err; | |
567 | ||
568 | fp = ksmbd_lookup_fd_slow(work, fid, p_id); | |
569 | if (!fp) { | |
bde1694a | 570 | pr_err("failed to get filp for fid %llu\n", fid); |
f4415848 NJ |
571 | return -ENOENT; |
572 | } | |
573 | err = vfs_fsync(fp->filp, 0); | |
574 | if (err < 0) | |
bde1694a | 575 | pr_err("smb fsync failed, err = %d\n", err); |
f4415848 NJ |
576 | ksmbd_fd_put(work, fp); |
577 | return err; | |
578 | } | |
579 | ||
580 | /** | |
581 | * ksmbd_vfs_remove_file() - vfs helper for smb rmdir or unlink | |
265fd199 | 582 | * @name: directory or file name that is relative to share |
f4415848 NJ |
583 | * |
584 | * Return: 0 on success, otherwise error | |
585 | */ | |
586 | int ksmbd_vfs_remove_file(struct ksmbd_work *work, char *name) | |
587 | { | |
da1e7ada | 588 | struct user_namespace *user_ns; |
7c3d3e99 | 589 | struct path path; |
333111a6 | 590 | struct dentry *parent; |
3161ad3a | 591 | int err; |
f4415848 | 592 | |
f4415848 NJ |
593 | if (ksmbd_override_fsids(work)) |
594 | return -ENOMEM; | |
595 | ||
265fd199 | 596 | err = ksmbd_vfs_kern_path(work, name, LOOKUP_NO_SYMLINKS, &path, false); |
f4415848 NJ |
597 | if (err) { |
598 | ksmbd_debug(VFS, "can't get %s, err %d\n", name, err); | |
599 | ksmbd_revert_fsids(work); | |
f4415848 NJ |
600 | return err; |
601 | } | |
602 | ||
da1e7ada | 603 | user_ns = mnt_user_ns(path.mnt); |
7c3d3e99 | 604 | parent = dget_parent(path.dentry); |
da1e7ada | 605 | err = ksmbd_vfs_lock_parent(user_ns, parent, path.dentry); |
333111a6 HL |
606 | if (err) { |
607 | dput(parent); | |
608 | path_put(&path); | |
609 | ksmbd_revert_fsids(work); | |
610 | return err; | |
f4415848 NJ |
611 | } |
612 | ||
333111a6 | 613 | if (!d_inode(path.dentry)->i_nlink) { |
f4415848 NJ |
614 | err = -ENOENT; |
615 | goto out_err; | |
616 | } | |
617 | ||
333111a6 | 618 | if (S_ISDIR(d_inode(path.dentry)->i_mode)) { |
da1e7ada | 619 | err = vfs_rmdir(user_ns, d_inode(parent), path.dentry); |
f4415848 NJ |
620 | if (err && err != -ENOTEMPTY) |
621 | ksmbd_debug(VFS, "%s: rmdir failed, err %d\n", name, | |
070fb21e | 622 | err); |
f4415848 | 623 | } else { |
da1e7ada | 624 | err = vfs_unlink(user_ns, d_inode(parent), path.dentry, NULL); |
f4415848 NJ |
625 | if (err) |
626 | ksmbd_debug(VFS, "%s: unlink failed, err %d\n", name, | |
070fb21e | 627 | err); |
f4415848 NJ |
628 | } |
629 | ||
f4415848 | 630 | out_err: |
7c3d3e99 NJ |
631 | inode_unlock(d_inode(parent)); |
632 | dput(parent); | |
633 | path_put(&path); | |
f4415848 NJ |
634 | ksmbd_revert_fsids(work); |
635 | return err; | |
636 | } | |
637 | ||
638 | /** | |
639 | * ksmbd_vfs_link() - vfs helper for creating smb hardlink | |
640 | * @oldname: source file name | |
265fd199 | 641 | * @newname: hardlink name that is relative to share |
f4415848 NJ |
642 | * |
643 | * Return: 0 on success, otherwise error | |
644 | */ | |
64b39f4a | 645 | int ksmbd_vfs_link(struct ksmbd_work *work, const char *oldname, |
070fb21e | 646 | const char *newname) |
f4415848 NJ |
647 | { |
648 | struct path oldpath, newpath; | |
649 | struct dentry *dentry; | |
650 | int err; | |
651 | ||
652 | if (ksmbd_override_fsids(work)) | |
653 | return -ENOMEM; | |
654 | ||
4ea47798 | 655 | err = kern_path(oldname, LOOKUP_NO_SYMLINKS, &oldpath); |
f4415848 | 656 | if (err) { |
bde1694a NJ |
657 | pr_err("cannot get linux path for %s, err = %d\n", |
658 | oldname, err); | |
f4415848 NJ |
659 | goto out1; |
660 | } | |
661 | ||
265fd199 HL |
662 | dentry = ksmbd_vfs_kern_path_create(work, newname, |
663 | LOOKUP_NO_SYMLINKS | LOOKUP_REVAL, | |
664 | &newpath); | |
f4415848 NJ |
665 | if (IS_ERR(dentry)) { |
666 | err = PTR_ERR(dentry); | |
bde1694a | 667 | pr_err("path create err for %s, err %d\n", newname, err); |
f4415848 NJ |
668 | goto out2; |
669 | } | |
670 | ||
671 | err = -EXDEV; | |
672 | if (oldpath.mnt != newpath.mnt) { | |
bde1694a | 673 | pr_err("vfs_link failed err %d\n", err); |
f4415848 NJ |
674 | goto out3; |
675 | } | |
676 | ||
af34983e HL |
677 | err = vfs_link(oldpath.dentry, mnt_user_ns(newpath.mnt), |
678 | d_inode(newpath.dentry), | |
070fb21e | 679 | dentry, NULL); |
f4415848 NJ |
680 | if (err) |
681 | ksmbd_debug(VFS, "vfs_link failed err %d\n", err); | |
682 | ||
683 | out3: | |
684 | done_path_create(&newpath, dentry); | |
685 | out2: | |
686 | path_put(&oldpath); | |
687 | out1: | |
688 | ksmbd_revert_fsids(work); | |
689 | return err; | |
690 | } | |
691 | ||
4b637fc1 NJ |
692 | static int ksmbd_validate_entry_in_use(struct dentry *src_dent) |
693 | { | |
694 | struct dentry *dst_dent; | |
695 | ||
696 | spin_lock(&src_dent->d_lock); | |
697 | list_for_each_entry(dst_dent, &src_dent->d_subdirs, d_child) { | |
698 | struct ksmbd_file *child_fp; | |
699 | ||
700 | if (d_really_is_negative(dst_dent)) | |
701 | continue; | |
702 | ||
703 | child_fp = ksmbd_lookup_fd_inode(d_inode(dst_dent)); | |
704 | if (child_fp) { | |
705 | spin_unlock(&src_dent->d_lock); | |
706 | ksmbd_debug(VFS, "Forbid rename, sub file/dir is in use\n"); | |
707 | return -EACCES; | |
708 | } | |
709 | } | |
710 | spin_unlock(&src_dent->d_lock); | |
711 | ||
712 | return 0; | |
713 | } | |
714 | ||
f4415848 | 715 | static int __ksmbd_vfs_rename(struct ksmbd_work *work, |
af34983e | 716 | struct user_namespace *src_user_ns, |
070fb21e NJ |
717 | struct dentry *src_dent_parent, |
718 | struct dentry *src_dent, | |
af34983e | 719 | struct user_namespace *dst_user_ns, |
070fb21e NJ |
720 | struct dentry *dst_dent_parent, |
721 | struct dentry *trap_dent, | |
722 | char *dst_name) | |
f4415848 NJ |
723 | { |
724 | struct dentry *dst_dent; | |
725 | int err; | |
726 | ||
c36fca86 | 727 | if (!work->tcon->posix_extensions) { |
4b637fc1 NJ |
728 | err = ksmbd_validate_entry_in_use(src_dent); |
729 | if (err) | |
730 | return err; | |
f4415848 | 731 | } |
f4415848 NJ |
732 | |
733 | if (d_really_is_negative(src_dent_parent)) | |
734 | return -ENOENT; | |
735 | if (d_really_is_negative(dst_dent_parent)) | |
736 | return -ENOENT; | |
737 | if (d_really_is_negative(src_dent)) | |
738 | return -ENOENT; | |
739 | if (src_dent == trap_dent) | |
740 | return -EINVAL; | |
741 | ||
742 | if (ksmbd_override_fsids(work)) | |
743 | return -ENOMEM; | |
744 | ||
da1e7ada CB |
745 | dst_dent = lookup_one(dst_user_ns, dst_name, dst_dent_parent, |
746 | strlen(dst_name)); | |
f4415848 NJ |
747 | err = PTR_ERR(dst_dent); |
748 | if (IS_ERR(dst_dent)) { | |
bde1694a | 749 | pr_err("lookup failed %s [%d]\n", dst_name, err); |
f4415848 NJ |
750 | goto out; |
751 | } | |
752 | ||
753 | err = -ENOTEMPTY; | |
754 | if (dst_dent != trap_dent && !d_really_is_positive(dst_dent)) { | |
755 | struct renamedata rd = { | |
af34983e | 756 | .old_mnt_userns = src_user_ns, |
f4415848 NJ |
757 | .old_dir = d_inode(src_dent_parent), |
758 | .old_dentry = src_dent, | |
af34983e | 759 | .new_mnt_userns = dst_user_ns, |
f4415848 NJ |
760 | .new_dir = d_inode(dst_dent_parent), |
761 | .new_dentry = dst_dent, | |
762 | }; | |
763 | err = vfs_rename(&rd); | |
764 | } | |
765 | if (err) | |
bde1694a | 766 | pr_err("vfs_rename failed err %d\n", err); |
f4415848 NJ |
767 | if (dst_dent) |
768 | dput(dst_dent); | |
769 | out: | |
770 | ksmbd_revert_fsids(work); | |
771 | return err; | |
772 | } | |
773 | ||
774 | int ksmbd_vfs_fp_rename(struct ksmbd_work *work, struct ksmbd_file *fp, | |
070fb21e | 775 | char *newname) |
f4415848 | 776 | { |
da1e7ada | 777 | struct user_namespace *user_ns; |
f4415848 NJ |
778 | struct path dst_path; |
779 | struct dentry *src_dent_parent, *dst_dent_parent; | |
ff1d5727 | 780 | struct dentry *src_dent, *trap_dent, *src_child; |
f4415848 NJ |
781 | char *dst_name; |
782 | int err; | |
783 | ||
784 | dst_name = extract_last_component(newname); | |
265fd199 HL |
785 | if (!dst_name) { |
786 | dst_name = newname; | |
787 | newname = ""; | |
788 | } | |
f4415848 NJ |
789 | |
790 | src_dent_parent = dget_parent(fp->filp->f_path.dentry); | |
f4415848 | 791 | src_dent = fp->filp->f_path.dentry; |
f4415848 | 792 | |
265fd199 HL |
793 | err = ksmbd_vfs_kern_path(work, newname, |
794 | LOOKUP_NO_SYMLINKS | LOOKUP_DIRECTORY, | |
795 | &dst_path, false); | |
f4415848 NJ |
796 | if (err) { |
797 | ksmbd_debug(VFS, "Cannot get path for %s [%d]\n", newname, err); | |
798 | goto out; | |
799 | } | |
800 | dst_dent_parent = dst_path.dentry; | |
f4415848 NJ |
801 | |
802 | trap_dent = lock_rename(src_dent_parent, dst_dent_parent); | |
ff1d5727 NJ |
803 | dget(src_dent); |
804 | dget(dst_dent_parent); | |
da1e7ada CB |
805 | user_ns = file_mnt_user_ns(fp->filp); |
806 | src_child = lookup_one(user_ns, src_dent->d_name.name, src_dent_parent, | |
807 | src_dent->d_name.len); | |
ff1d5727 NJ |
808 | if (IS_ERR(src_child)) { |
809 | err = PTR_ERR(src_child); | |
810 | goto out_lock; | |
811 | } | |
812 | ||
813 | if (src_child != src_dent) { | |
814 | err = -ESTALE; | |
815 | dput(src_child); | |
816 | goto out_lock; | |
817 | } | |
818 | dput(src_child); | |
819 | ||
f4415848 | 820 | err = __ksmbd_vfs_rename(work, |
da1e7ada | 821 | user_ns, |
f4415848 NJ |
822 | src_dent_parent, |
823 | src_dent, | |
af34983e | 824 | mnt_user_ns(dst_path.mnt), |
f4415848 NJ |
825 | dst_dent_parent, |
826 | trap_dent, | |
827 | dst_name); | |
ff1d5727 NJ |
828 | out_lock: |
829 | dput(src_dent); | |
f4415848 | 830 | dput(dst_dent_parent); |
ff1d5727 | 831 | unlock_rename(src_dent_parent, dst_dent_parent); |
f4415848 NJ |
832 | path_put(&dst_path); |
833 | out: | |
f4415848 NJ |
834 | dput(src_dent_parent); |
835 | return err; | |
836 | } | |
837 | ||
838 | /** | |
839 | * ksmbd_vfs_truncate() - vfs helper for smb file truncate | |
840 | * @work: work | |
f4415848 NJ |
841 | * @fid: file id of old file |
842 | * @size: truncate to given size | |
843 | * | |
844 | * Return: 0 on success, otherwise error | |
845 | */ | |
265fd199 | 846 | int ksmbd_vfs_truncate(struct ksmbd_work *work, |
070fb21e | 847 | struct ksmbd_file *fp, loff_t size) |
f4415848 | 848 | { |
f4415848 | 849 | int err = 0; |
265fd199 | 850 | struct file *filp; |
f4415848 | 851 | |
265fd199 | 852 | filp = fp->filp; |
f4415848 | 853 | |
265fd199 HL |
854 | /* Do we need to break any of a levelII oplock? */ |
855 | smb_break_all_levII_oplock(work, fp, 1); | |
c36fca86 | 856 | |
265fd199 HL |
857 | if (!work->tcon->posix_extensions) { |
858 | struct inode *inode = file_inode(filp); | |
859 | ||
860 | if (size < inode->i_size) { | |
861 | err = check_lock_range(filp, size, | |
862 | inode->i_size - 1, WRITE); | |
863 | } else { | |
864 | err = check_lock_range(filp, inode->i_size, | |
865 | size - 1, WRITE); | |
f4415848 NJ |
866 | } |
867 | ||
265fd199 HL |
868 | if (err) { |
869 | pr_err("failed due to lock\n"); | |
870 | return -EAGAIN; | |
871 | } | |
f4415848 NJ |
872 | } |
873 | ||
265fd199 HL |
874 | err = vfs_truncate(&filp->f_path, size); |
875 | if (err) | |
50f500b7 | 876 | pr_err("truncate failed, err %d\n", err); |
f4415848 NJ |
877 | return err; |
878 | } | |
879 | ||
880 | /** | |
881 | * ksmbd_vfs_listxattr() - vfs helper for smb list extended attributes | |
882 | * @dentry: dentry of file for listing xattrs | |
883 | * @list: destination buffer | |
884 | * @size: destination buffer length | |
885 | * | |
886 | * Return: xattr list length on success, otherwise error | |
887 | */ | |
888 | ssize_t ksmbd_vfs_listxattr(struct dentry *dentry, char **list) | |
889 | { | |
890 | ssize_t size; | |
891 | char *vlist = NULL; | |
892 | ||
893 | size = vfs_listxattr(dentry, NULL, 0); | |
894 | if (size <= 0) | |
895 | return size; | |
896 | ||
79f6b11a | 897 | vlist = kvmalloc(size, GFP_KERNEL | __GFP_ZERO); |
f4415848 NJ |
898 | if (!vlist) |
899 | return -ENOMEM; | |
900 | ||
901 | *list = vlist; | |
902 | size = vfs_listxattr(dentry, vlist, size); | |
903 | if (size < 0) { | |
904 | ksmbd_debug(VFS, "listxattr failed\n"); | |
79f6b11a | 905 | kvfree(vlist); |
f4415848 NJ |
906 | *list = NULL; |
907 | } | |
908 | ||
909 | return size; | |
910 | } | |
911 | ||
af34983e HL |
912 | static ssize_t ksmbd_vfs_xattr_len(struct user_namespace *user_ns, |
913 | struct dentry *dentry, char *xattr_name) | |
f4415848 | 914 | { |
af34983e | 915 | return vfs_getxattr(user_ns, dentry, xattr_name, NULL, 0); |
f4415848 NJ |
916 | } |
917 | ||
918 | /** | |
919 | * ksmbd_vfs_getxattr() - vfs helper for smb get extended attributes value | |
af34983e | 920 | * @user_ns: user namespace |
f4415848 NJ |
921 | * @dentry: dentry of file for getting xattrs |
922 | * @xattr_name: name of xattr name to query | |
923 | * @xattr_buf: destination buffer xattr value | |
924 | * | |
925 | * Return: read xattr value length on success, otherwise error | |
926 | */ | |
af34983e HL |
927 | ssize_t ksmbd_vfs_getxattr(struct user_namespace *user_ns, |
928 | struct dentry *dentry, | |
929 | char *xattr_name, char **xattr_buf) | |
f4415848 NJ |
930 | { |
931 | ssize_t xattr_len; | |
932 | char *buf; | |
933 | ||
934 | *xattr_buf = NULL; | |
af34983e | 935 | xattr_len = ksmbd_vfs_xattr_len(user_ns, dentry, xattr_name); |
f4415848 NJ |
936 | if (xattr_len < 0) |
937 | return xattr_len; | |
938 | ||
939 | buf = kmalloc(xattr_len + 1, GFP_KERNEL); | |
940 | if (!buf) | |
941 | return -ENOMEM; | |
942 | ||
af34983e | 943 | xattr_len = vfs_getxattr(user_ns, dentry, xattr_name, |
d7e5852b | 944 | (void *)buf, xattr_len); |
f4415848 NJ |
945 | if (xattr_len > 0) |
946 | *xattr_buf = buf; | |
947 | else | |
948 | kfree(buf); | |
949 | return xattr_len; | |
950 | } | |
951 | ||
952 | /** | |
953 | * ksmbd_vfs_setxattr() - vfs helper for smb set extended attributes value | |
af34983e | 954 | * @user_ns: user namespace |
f4415848 NJ |
955 | * @dentry: dentry to set XATTR at |
956 | * @name: xattr name for setxattr | |
957 | * @value: xattr value to set | |
958 | * @size: size of xattr value | |
959 | * @flags: destination buffer length | |
960 | * | |
961 | * Return: 0 on success, otherwise error | |
962 | */ | |
af34983e HL |
963 | int ksmbd_vfs_setxattr(struct user_namespace *user_ns, |
964 | struct dentry *dentry, const char *attr_name, | |
0c5fd887 | 965 | void *attr_value, size_t attr_size, int flags) |
f4415848 NJ |
966 | { |
967 | int err; | |
968 | ||
af34983e HL |
969 | err = vfs_setxattr(user_ns, |
970 | dentry, | |
f4415848 NJ |
971 | attr_name, |
972 | attr_value, | |
973 | attr_size, | |
974 | flags); | |
975 | if (err) | |
976 | ksmbd_debug(VFS, "setxattr failed, err %d\n", err); | |
977 | return err; | |
978 | } | |
979 | ||
980 | /** | |
981 | * ksmbd_vfs_set_fadvise() - convert smb IO caching options to linux options | |
982 | * @filp: file pointer for IO | |
983 | * @options: smb IO options | |
984 | */ | |
985 | void ksmbd_vfs_set_fadvise(struct file *filp, __le32 option) | |
986 | { | |
987 | struct address_space *mapping; | |
988 | ||
989 | mapping = filp->f_mapping; | |
990 | ||
991 | if (!option || !mapping) | |
992 | return; | |
993 | ||
64b39f4a | 994 | if (option & FILE_WRITE_THROUGH_LE) { |
f4415848 | 995 | filp->f_flags |= O_SYNC; |
64b39f4a | 996 | } else if (option & FILE_SEQUENTIAL_ONLY_LE) { |
f4415848 NJ |
997 | filp->f_ra.ra_pages = inode_to_bdi(mapping->host)->ra_pages * 2; |
998 | spin_lock(&filp->f_lock); | |
999 | filp->f_mode &= ~FMODE_RANDOM; | |
1000 | spin_unlock(&filp->f_lock); | |
1001 | } else if (option & FILE_RANDOM_ACCESS_LE) { | |
1002 | spin_lock(&filp->f_lock); | |
1003 | filp->f_mode |= FMODE_RANDOM; | |
1004 | spin_unlock(&filp->f_lock); | |
1005 | } | |
1006 | } | |
1007 | ||
64b39f4a | 1008 | int ksmbd_vfs_zero_data(struct ksmbd_work *work, struct ksmbd_file *fp, |
070fb21e | 1009 | loff_t off, loff_t len) |
f4415848 NJ |
1010 | { |
1011 | smb_break_all_levII_oplock(work, fp, 1); | |
26a2787d | 1012 | if (fp->f_ci->m_fattr & FILE_ATTRIBUTE_SPARSE_FILE_LE) |
f4415848 | 1013 | return vfs_fallocate(fp->filp, |
070fb21e NJ |
1014 | FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, |
1015 | off, len); | |
f4415848 | 1016 | |
18e39fb9 NJ |
1017 | return vfs_fallocate(fp->filp, |
1018 | FALLOC_FL_ZERO_RANGE | FALLOC_FL_KEEP_SIZE, | |
1019 | off, len); | |
f4415848 NJ |
1020 | } |
1021 | ||
1022 | int ksmbd_vfs_fqar_lseek(struct ksmbd_file *fp, loff_t start, loff_t length, | |
070fb21e | 1023 | struct file_allocated_range_buffer *ranges, |
f7db8fd0 | 1024 | unsigned int in_count, unsigned int *out_count) |
f4415848 NJ |
1025 | { |
1026 | struct file *f = fp->filp; | |
ab0b263b | 1027 | struct inode *inode = file_inode(fp->filp); |
f4415848 NJ |
1028 | loff_t maxbytes = (u64)inode->i_sb->s_maxbytes, end; |
1029 | loff_t extent_start, extent_end; | |
1030 | int ret = 0; | |
1031 | ||
1032 | if (start > maxbytes) | |
1033 | return -EFBIG; | |
1034 | ||
1035 | if (!in_count) | |
1036 | return 0; | |
1037 | ||
1038 | /* | |
1039 | * Shrink request scope to what the fs can actually handle. | |
1040 | */ | |
1041 | if (length > maxbytes || (maxbytes - length) < start) | |
1042 | length = maxbytes - start; | |
1043 | ||
1044 | if (start + length > inode->i_size) | |
1045 | length = inode->i_size - start; | |
1046 | ||
1047 | *out_count = 0; | |
1048 | end = start + length; | |
1049 | while (start < end && *out_count < in_count) { | |
067baa9a | 1050 | extent_start = vfs_llseek(f, start, SEEK_DATA); |
f4415848 NJ |
1051 | if (extent_start < 0) { |
1052 | if (extent_start != -ENXIO) | |
1053 | ret = (int)extent_start; | |
1054 | break; | |
1055 | } | |
1056 | ||
1057 | if (extent_start >= end) | |
1058 | break; | |
1059 | ||
067baa9a | 1060 | extent_end = vfs_llseek(f, extent_start, SEEK_HOLE); |
f4415848 NJ |
1061 | if (extent_end < 0) { |
1062 | if (extent_end != -ENXIO) | |
1063 | ret = (int)extent_end; | |
1064 | break; | |
64b39f4a | 1065 | } else if (extent_start >= extent_end) { |
f4415848 | 1066 | break; |
64b39f4a | 1067 | } |
f4415848 NJ |
1068 | |
1069 | ranges[*out_count].file_offset = cpu_to_le64(extent_start); | |
1070 | ranges[(*out_count)++].length = | |
1071 | cpu_to_le64(min(extent_end, end) - extent_start); | |
1072 | ||
1073 | start = extent_end; | |
1074 | } | |
1075 | ||
1076 | return ret; | |
1077 | } | |
1078 | ||
af34983e HL |
1079 | int ksmbd_vfs_remove_xattr(struct user_namespace *user_ns, |
1080 | struct dentry *dentry, char *attr_name) | |
f4415848 | 1081 | { |
af34983e | 1082 | return vfs_removexattr(user_ns, dentry, attr_name); |
f4415848 NJ |
1083 | } |
1084 | ||
af34983e HL |
1085 | int ksmbd_vfs_unlink(struct user_namespace *user_ns, |
1086 | struct dentry *dir, struct dentry *dentry) | |
f4415848 NJ |
1087 | { |
1088 | int err = 0; | |
1089 | ||
da1e7ada | 1090 | err = ksmbd_vfs_lock_parent(user_ns, dir, dentry); |
333111a6 HL |
1091 | if (err) |
1092 | return err; | |
ff1d5727 | 1093 | dget(dentry); |
f4415848 NJ |
1094 | |
1095 | if (S_ISDIR(d_inode(dentry)->i_mode)) | |
af34983e | 1096 | err = vfs_rmdir(user_ns, d_inode(dir), dentry); |
f4415848 | 1097 | else |
af34983e | 1098 | err = vfs_unlink(user_ns, d_inode(dir), dentry, NULL); |
f4415848 | 1099 | |
f4415848 | 1100 | dput(dentry); |
ff1d5727 | 1101 | inode_unlock(d_inode(dir)); |
f4415848 NJ |
1102 | if (err) |
1103 | ksmbd_debug(VFS, "failed to delete, err %d\n", err); | |
1104 | ||
1105 | return err; | |
1106 | } | |
1107 | ||
64b39f4a | 1108 | static int __dir_empty(struct dir_context *ctx, const char *name, int namlen, |
070fb21e | 1109 | loff_t offset, u64 ino, unsigned int d_type) |
f4415848 NJ |
1110 | { |
1111 | struct ksmbd_readdir_data *buf; | |
1112 | ||
1113 | buf = container_of(ctx, struct ksmbd_readdir_data, ctx); | |
1114 | buf->dirent_count++; | |
1115 | ||
1116 | if (buf->dirent_count > 2) | |
1117 | return -ENOTEMPTY; | |
1118 | return 0; | |
1119 | } | |
1120 | ||
1121 | /** | |
1122 | * ksmbd_vfs_empty_dir() - check for empty directory | |
1123 | * @fp: ksmbd file pointer | |
1124 | * | |
1125 | * Return: true if directory empty, otherwise false | |
1126 | */ | |
1127 | int ksmbd_vfs_empty_dir(struct ksmbd_file *fp) | |
1128 | { | |
1129 | int err; | |
1130 | struct ksmbd_readdir_data readdir_data; | |
1131 | ||
1132 | memset(&readdir_data, 0, sizeof(struct ksmbd_readdir_data)); | |
1133 | ||
1134 | set_ctx_actor(&readdir_data.ctx, __dir_empty); | |
1135 | readdir_data.dirent_count = 0; | |
1136 | ||
e8c06191 | 1137 | err = iterate_dir(fp->filp, &readdir_data.ctx); |
f4415848 NJ |
1138 | if (readdir_data.dirent_count > 2) |
1139 | err = -ENOTEMPTY; | |
1140 | else | |
1141 | err = 0; | |
1142 | return err; | |
1143 | } | |
1144 | ||
64b39f4a | 1145 | static int __caseless_lookup(struct dir_context *ctx, const char *name, |
070fb21e NJ |
1146 | int namlen, loff_t offset, u64 ino, |
1147 | unsigned int d_type) | |
f4415848 NJ |
1148 | { |
1149 | struct ksmbd_readdir_data *buf; | |
1150 | ||
1151 | buf = container_of(ctx, struct ksmbd_readdir_data, ctx); | |
1152 | ||
1153 | if (buf->used != namlen) | |
1154 | return 0; | |
1155 | if (!strncasecmp((char *)buf->private, name, namlen)) { | |
1156 | memcpy((char *)buf->private, name, namlen); | |
1157 | buf->dirent_count = 1; | |
1158 | return -EEXIST; | |
1159 | } | |
1160 | return 0; | |
1161 | } | |
1162 | ||
1163 | /** | |
1164 | * ksmbd_vfs_lookup_in_dir() - lookup a file in a directory | |
3c203783 HL |
1165 | * @dir: path info |
1166 | * @name: filename to lookup | |
1167 | * @namelen: filename length | |
f4415848 NJ |
1168 | * |
1169 | * Return: 0 on success, otherwise error | |
1170 | */ | |
3c203783 | 1171 | static int ksmbd_vfs_lookup_in_dir(struct path *dir, char *name, size_t namelen) |
f4415848 | 1172 | { |
f4415848 NJ |
1173 | int ret; |
1174 | struct file *dfilp; | |
64b39f4a | 1175 | int flags = O_RDONLY | O_LARGEFILE; |
f4415848 NJ |
1176 | struct ksmbd_readdir_data readdir_data = { |
1177 | .ctx.actor = __caseless_lookup, | |
3c203783 HL |
1178 | .private = name, |
1179 | .used = namelen, | |
1180 | .dirent_count = 0, | |
f4415848 NJ |
1181 | }; |
1182 | ||
3c203783 HL |
1183 | dfilp = dentry_open(dir, flags, current_cred()); |
1184 | if (IS_ERR(dfilp)) | |
1185 | return PTR_ERR(dfilp); | |
f4415848 | 1186 | |
e8c06191 | 1187 | ret = iterate_dir(dfilp, &readdir_data.ctx); |
f4415848 NJ |
1188 | if (readdir_data.dirent_count > 0) |
1189 | ret = 0; | |
f4415848 | 1190 | fput(dfilp); |
f4415848 NJ |
1191 | return ret; |
1192 | } | |
1193 | ||
1194 | /** | |
1195 | * ksmbd_vfs_kern_path() - lookup a file and get path info | |
265fd199 | 1196 | * @name: file path that is relative to share |
f4415848 NJ |
1197 | * @flags: lookup flags |
1198 | * @path: if lookup succeed, return path info | |
1199 | * @caseless: caseless filename lookup | |
1200 | * | |
1201 | * Return: 0 on success, otherwise error | |
1202 | */ | |
265fd199 HL |
1203 | int ksmbd_vfs_kern_path(struct ksmbd_work *work, char *name, |
1204 | unsigned int flags, struct path *path, bool caseless) | |
f4415848 | 1205 | { |
265fd199 | 1206 | struct ksmbd_share_config *share_conf = work->tcon->share_conf; |
f4415848 NJ |
1207 | int err; |
1208 | ||
265fd199 HL |
1209 | flags |= LOOKUP_BENEATH; |
1210 | err = vfs_path_lookup(share_conf->vfs_path.dentry, | |
1211 | share_conf->vfs_path.mnt, | |
1212 | name, | |
1213 | flags, | |
1214 | path); | |
f4415848 | 1215 | if (!err) |
3c203783 | 1216 | return 0; |
f4415848 NJ |
1217 | |
1218 | if (caseless) { | |
3c203783 HL |
1219 | char *filepath; |
1220 | struct path parent; | |
1221 | size_t path_len, remain_len; | |
f4415848 | 1222 | |
3c203783 HL |
1223 | filepath = kstrdup(name, GFP_KERNEL); |
1224 | if (!filepath) | |
1225 | return -ENOMEM; | |
1226 | ||
1227 | path_len = strlen(filepath); | |
265fd199 | 1228 | remain_len = path_len; |
f4415848 | 1229 | |
265fd199 HL |
1230 | parent = share_conf->vfs_path; |
1231 | path_get(&parent); | |
f4415848 | 1232 | |
3c203783 HL |
1233 | while (d_can_lookup(parent.dentry)) { |
1234 | char *filename = filepath + path_len - remain_len; | |
1235 | char *next = strchrnul(filename, '/'); | |
1236 | size_t filename_len = next - filename; | |
1237 | bool is_last = !next[0]; | |
1238 | ||
1239 | if (filename_len == 0) | |
1240 | break; | |
1241 | ||
1242 | err = ksmbd_vfs_lookup_in_dir(&parent, filename, | |
1243 | filename_len); | |
265fd199 HL |
1244 | path_put(&parent); |
1245 | if (err) | |
3c203783 | 1246 | goto out; |
3c203783 | 1247 | |
3c203783 HL |
1248 | next[0] = '\0'; |
1249 | ||
265fd199 HL |
1250 | err = vfs_path_lookup(share_conf->vfs_path.dentry, |
1251 | share_conf->vfs_path.mnt, | |
1252 | filepath, | |
1253 | flags, | |
1254 | &parent); | |
3c203783 HL |
1255 | if (err) |
1256 | goto out; | |
265fd199 HL |
1257 | else if (is_last) { |
1258 | *path = parent; | |
3c203783 HL |
1259 | goto out; |
1260 | } | |
1261 | ||
1262 | next[0] = '/'; | |
1263 | remain_len -= filename_len + 1; | |
1264 | } | |
1265 | ||
1266 | path_put(&parent); | |
1267 | err = -EINVAL; | |
f4415848 | 1268 | out: |
3c203783 HL |
1269 | kfree(filepath); |
1270 | } | |
f4415848 NJ |
1271 | return err; |
1272 | } | |
1273 | ||
265fd199 HL |
1274 | struct dentry *ksmbd_vfs_kern_path_create(struct ksmbd_work *work, |
1275 | const char *name, | |
1276 | unsigned int flags, | |
1277 | struct path *path) | |
1278 | { | |
1279 | char *abs_name; | |
1280 | struct dentry *dent; | |
1281 | ||
1282 | abs_name = convert_to_unix_name(work->tcon->share_conf, name); | |
1283 | if (!abs_name) | |
1284 | return ERR_PTR(-ENOMEM); | |
1285 | ||
1286 | dent = kern_path_create(AT_FDCWD, abs_name, path, flags); | |
1287 | kfree(abs_name); | |
1288 | return dent; | |
1289 | } | |
1290 | ||
af34983e HL |
1291 | int ksmbd_vfs_remove_acl_xattrs(struct user_namespace *user_ns, |
1292 | struct dentry *dentry) | |
f4415848 NJ |
1293 | { |
1294 | char *name, *xattr_list = NULL; | |
1295 | ssize_t xattr_list_len; | |
1296 | int err = 0; | |
1297 | ||
1298 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
1299 | if (xattr_list_len < 0) { | |
1300 | goto out; | |
1301 | } else if (!xattr_list_len) { | |
1302 | ksmbd_debug(SMB, "empty xattr in the file\n"); | |
1303 | goto out; | |
1304 | } | |
1305 | ||
1306 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
070fb21e | 1307 | name += strlen(name) + 1) { |
f4415848 NJ |
1308 | ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name)); |
1309 | ||
1310 | if (!strncmp(name, XATTR_NAME_POSIX_ACL_ACCESS, | |
64b39f4a | 1311 | sizeof(XATTR_NAME_POSIX_ACL_ACCESS) - 1) || |
f4415848 | 1312 | !strncmp(name, XATTR_NAME_POSIX_ACL_DEFAULT, |
64b39f4a | 1313 | sizeof(XATTR_NAME_POSIX_ACL_DEFAULT) - 1)) { |
af34983e | 1314 | err = ksmbd_vfs_remove_xattr(user_ns, dentry, name); |
f4415848 NJ |
1315 | if (err) |
1316 | ksmbd_debug(SMB, | |
070fb21e | 1317 | "remove acl xattr failed : %s\n", name); |
f4415848 NJ |
1318 | } |
1319 | } | |
1320 | out: | |
79f6b11a | 1321 | kvfree(xattr_list); |
f4415848 NJ |
1322 | return err; |
1323 | } | |
1324 | ||
af34983e HL |
1325 | int ksmbd_vfs_remove_sd_xattrs(struct user_namespace *user_ns, |
1326 | struct dentry *dentry) | |
f4415848 NJ |
1327 | { |
1328 | char *name, *xattr_list = NULL; | |
1329 | ssize_t xattr_list_len; | |
1330 | int err = 0; | |
1331 | ||
1332 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
1333 | if (xattr_list_len < 0) { | |
1334 | goto out; | |
1335 | } else if (!xattr_list_len) { | |
1336 | ksmbd_debug(SMB, "empty xattr in the file\n"); | |
1337 | goto out; | |
1338 | } | |
1339 | ||
1340 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
1341 | name += strlen(name) + 1) { | |
1342 | ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name)); | |
1343 | ||
1344 | if (!strncmp(name, XATTR_NAME_SD, XATTR_NAME_SD_LEN)) { | |
af34983e | 1345 | err = ksmbd_vfs_remove_xattr(user_ns, dentry, name); |
f4415848 NJ |
1346 | if (err) |
1347 | ksmbd_debug(SMB, "remove xattr failed : %s\n", name); | |
1348 | } | |
1349 | } | |
1350 | out: | |
79f6b11a | 1351 | kvfree(xattr_list); |
f4415848 NJ |
1352 | return err; |
1353 | } | |
1354 | ||
af34983e HL |
1355 | static struct xattr_smb_acl *ksmbd_vfs_make_xattr_posix_acl(struct user_namespace *user_ns, |
1356 | struct inode *inode, | |
070fb21e | 1357 | int acl_type) |
f4415848 NJ |
1358 | { |
1359 | struct xattr_smb_acl *smb_acl = NULL; | |
1360 | struct posix_acl *posix_acls; | |
1361 | struct posix_acl_entry *pa_entry; | |
1362 | struct xattr_acl_entry *xa_entry; | |
1363 | int i; | |
1364 | ||
777cad16 NJ |
1365 | if (!IS_ENABLED(CONFIG_FS_POSIX_ACL)) |
1366 | return NULL; | |
1367 | ||
67d1c432 | 1368 | posix_acls = get_acl(inode, acl_type); |
f4415848 NJ |
1369 | if (!posix_acls) |
1370 | return NULL; | |
1371 | ||
1372 | smb_acl = kzalloc(sizeof(struct xattr_smb_acl) + | |
1373 | sizeof(struct xattr_acl_entry) * posix_acls->a_count, | |
1374 | GFP_KERNEL); | |
1375 | if (!smb_acl) | |
1376 | goto out; | |
1377 | ||
1378 | smb_acl->count = posix_acls->a_count; | |
1379 | pa_entry = posix_acls->a_entries; | |
1380 | xa_entry = smb_acl->entries; | |
1381 | for (i = 0; i < posix_acls->a_count; i++, pa_entry++, xa_entry++) { | |
1382 | switch (pa_entry->e_tag) { | |
1383 | case ACL_USER: | |
1384 | xa_entry->type = SMB_ACL_USER; | |
0e844efe | 1385 | xa_entry->uid = posix_acl_uid_translate(user_ns, pa_entry); |
f4415848 NJ |
1386 | break; |
1387 | case ACL_USER_OBJ: | |
1388 | xa_entry->type = SMB_ACL_USER_OBJ; | |
1389 | break; | |
1390 | case ACL_GROUP: | |
1391 | xa_entry->type = SMB_ACL_GROUP; | |
0e844efe | 1392 | xa_entry->gid = posix_acl_gid_translate(user_ns, pa_entry); |
f4415848 NJ |
1393 | break; |
1394 | case ACL_GROUP_OBJ: | |
1395 | xa_entry->type = SMB_ACL_GROUP_OBJ; | |
1396 | break; | |
1397 | case ACL_OTHER: | |
1398 | xa_entry->type = SMB_ACL_OTHER; | |
1399 | break; | |
1400 | case ACL_MASK: | |
1401 | xa_entry->type = SMB_ACL_MASK; | |
1402 | break; | |
1403 | default: | |
bde1694a | 1404 | pr_err("unknown type : 0x%x\n", pa_entry->e_tag); |
f4415848 NJ |
1405 | goto out; |
1406 | } | |
1407 | ||
1408 | if (pa_entry->e_perm & ACL_READ) | |
1409 | xa_entry->perm |= SMB_ACL_READ; | |
1410 | if (pa_entry->e_perm & ACL_WRITE) | |
1411 | xa_entry->perm |= SMB_ACL_WRITE; | |
1412 | if (pa_entry->e_perm & ACL_EXECUTE) | |
1413 | xa_entry->perm |= SMB_ACL_EXECUTE; | |
1414 | } | |
1415 | out: | |
1416 | posix_acl_release(posix_acls); | |
1417 | return smb_acl; | |
1418 | } | |
1419 | ||
af34983e HL |
1420 | int ksmbd_vfs_set_sd_xattr(struct ksmbd_conn *conn, |
1421 | struct user_namespace *user_ns, | |
1422 | struct dentry *dentry, | |
070fb21e | 1423 | struct smb_ntsd *pntsd, int len) |
f4415848 NJ |
1424 | { |
1425 | int rc; | |
1426 | struct ndr sd_ndr = {0}, acl_ndr = {0}; | |
1427 | struct xattr_ntacl acl = {0}; | |
1428 | struct xattr_smb_acl *smb_acl, *def_smb_acl = NULL; | |
fba08fa0 | 1429 | struct inode *inode = d_inode(dentry); |
f4415848 NJ |
1430 | |
1431 | acl.version = 4; | |
1432 | acl.hash_type = XATTR_SD_HASH_TYPE_SHA256; | |
fba08fa0 | 1433 | acl.current_time = ksmbd_UnixTimeToNT(current_time(inode)); |
f4415848 NJ |
1434 | |
1435 | memcpy(acl.desc, "posix_acl", 9); | |
1436 | acl.desc_len = 10; | |
1437 | ||
1438 | pntsd->osidoffset = | |
1439 | cpu_to_le32(le32_to_cpu(pntsd->osidoffset) + NDR_NTSD_OFFSETOF); | |
1440 | pntsd->gsidoffset = | |
1441 | cpu_to_le32(le32_to_cpu(pntsd->gsidoffset) + NDR_NTSD_OFFSETOF); | |
1442 | pntsd->dacloffset = | |
1443 | cpu_to_le32(le32_to_cpu(pntsd->dacloffset) + NDR_NTSD_OFFSETOF); | |
1444 | ||
1445 | acl.sd_buf = (char *)pntsd; | |
1446 | acl.sd_size = len; | |
1447 | ||
1448 | rc = ksmbd_gen_sd_hash(conn, acl.sd_buf, acl.sd_size, acl.hash); | |
1449 | if (rc) { | |
bde1694a | 1450 | pr_err("failed to generate hash for ndr acl\n"); |
f4415848 NJ |
1451 | return rc; |
1452 | } | |
1453 | ||
af34983e HL |
1454 | smb_acl = ksmbd_vfs_make_xattr_posix_acl(user_ns, inode, |
1455 | ACL_TYPE_ACCESS); | |
f4415848 | 1456 | if (S_ISDIR(inode->i_mode)) |
af34983e | 1457 | def_smb_acl = ksmbd_vfs_make_xattr_posix_acl(user_ns, inode, |
070fb21e | 1458 | ACL_TYPE_DEFAULT); |
f4415848 | 1459 | |
af34983e HL |
1460 | rc = ndr_encode_posix_acl(&acl_ndr, user_ns, inode, |
1461 | smb_acl, def_smb_acl); | |
f4415848 | 1462 | if (rc) { |
bde1694a | 1463 | pr_err("failed to encode ndr to posix acl\n"); |
f4415848 NJ |
1464 | goto out; |
1465 | } | |
1466 | ||
1467 | rc = ksmbd_gen_sd_hash(conn, acl_ndr.data, acl_ndr.offset, | |
070fb21e | 1468 | acl.posix_acl_hash); |
f4415848 | 1469 | if (rc) { |
bde1694a | 1470 | pr_err("failed to generate hash for ndr acl\n"); |
f4415848 NJ |
1471 | goto out; |
1472 | } | |
1473 | ||
1474 | rc = ndr_encode_v4_ntacl(&sd_ndr, &acl); | |
1475 | if (rc) { | |
bde1694a | 1476 | pr_err("failed to encode ndr to posix acl\n"); |
f4415848 NJ |
1477 | goto out; |
1478 | } | |
1479 | ||
af34983e HL |
1480 | rc = ksmbd_vfs_setxattr(user_ns, dentry, |
1481 | XATTR_NAME_SD, sd_ndr.data, | |
070fb21e | 1482 | sd_ndr.offset, 0); |
f4415848 | 1483 | if (rc < 0) |
bde1694a | 1484 | pr_err("Failed to store XATTR ntacl :%d\n", rc); |
f4415848 NJ |
1485 | |
1486 | kfree(sd_ndr.data); | |
1487 | out: | |
1488 | kfree(acl_ndr.data); | |
1489 | kfree(smb_acl); | |
1490 | kfree(def_smb_acl); | |
1491 | return rc; | |
1492 | } | |
1493 | ||
af34983e HL |
1494 | int ksmbd_vfs_get_sd_xattr(struct ksmbd_conn *conn, |
1495 | struct user_namespace *user_ns, | |
1496 | struct dentry *dentry, | |
070fb21e | 1497 | struct smb_ntsd **pntsd) |
f4415848 NJ |
1498 | { |
1499 | int rc; | |
1500 | struct ndr n; | |
78ad2c27 NJ |
1501 | struct inode *inode = d_inode(dentry); |
1502 | struct ndr acl_ndr = {0}; | |
1503 | struct xattr_ntacl acl; | |
1504 | struct xattr_smb_acl *smb_acl = NULL, *def_smb_acl = NULL; | |
1505 | __u8 cmp_hash[XATTR_SD_HASH_SIZE] = {0}; | |
f4415848 | 1506 | |
af34983e | 1507 | rc = ksmbd_vfs_getxattr(user_ns, dentry, XATTR_NAME_SD, &n.data); |
78ad2c27 NJ |
1508 | if (rc <= 0) |
1509 | return rc; | |
f4415848 | 1510 | |
78ad2c27 NJ |
1511 | n.length = rc; |
1512 | rc = ndr_decode_v4_ntacl(&n, &acl); | |
1513 | if (rc) | |
1514 | goto free_n_data; | |
f4415848 | 1515 | |
78ad2c27 NJ |
1516 | smb_acl = ksmbd_vfs_make_xattr_posix_acl(user_ns, inode, |
1517 | ACL_TYPE_ACCESS); | |
1518 | if (S_ISDIR(inode->i_mode)) | |
1519 | def_smb_acl = ksmbd_vfs_make_xattr_posix_acl(user_ns, inode, | |
1520 | ACL_TYPE_DEFAULT); | |
f4415848 | 1521 | |
78ad2c27 NJ |
1522 | rc = ndr_encode_posix_acl(&acl_ndr, user_ns, inode, smb_acl, |
1523 | def_smb_acl); | |
1524 | if (rc) { | |
1525 | pr_err("failed to encode ndr to posix acl\n"); | |
1526 | goto out_free; | |
1527 | } | |
f4415848 | 1528 | |
78ad2c27 NJ |
1529 | rc = ksmbd_gen_sd_hash(conn, acl_ndr.data, acl_ndr.offset, cmp_hash); |
1530 | if (rc) { | |
1531 | pr_err("failed to generate hash for ndr acl\n"); | |
1532 | goto out_free; | |
1533 | } | |
1534 | ||
1535 | if (memcmp(cmp_hash, acl.posix_acl_hash, XATTR_SD_HASH_SIZE)) { | |
1536 | pr_err("hash value diff\n"); | |
1537 | rc = -EINVAL; | |
1538 | goto out_free; | |
1539 | } | |
1540 | ||
1541 | *pntsd = acl.sd_buf; | |
8f054118 NJ |
1542 | if (acl.sd_size < sizeof(struct smb_ntsd)) { |
1543 | pr_err("sd size is invalid\n"); | |
1544 | goto out_free; | |
1545 | } | |
1546 | ||
78ad2c27 NJ |
1547 | (*pntsd)->osidoffset = cpu_to_le32(le32_to_cpu((*pntsd)->osidoffset) - |
1548 | NDR_NTSD_OFFSETOF); | |
1549 | (*pntsd)->gsidoffset = cpu_to_le32(le32_to_cpu((*pntsd)->gsidoffset) - | |
1550 | NDR_NTSD_OFFSETOF); | |
1551 | (*pntsd)->dacloffset = cpu_to_le32(le32_to_cpu((*pntsd)->dacloffset) - | |
1552 | NDR_NTSD_OFFSETOF); | |
1553 | ||
1554 | rc = acl.sd_size; | |
1555 | out_free: | |
1556 | kfree(acl_ndr.data); | |
1557 | kfree(smb_acl); | |
1558 | kfree(def_smb_acl); | |
1559 | if (rc < 0) { | |
1560 | kfree(acl.sd_buf); | |
1561 | *pntsd = NULL; | |
f4415848 NJ |
1562 | } |
1563 | ||
78ad2c27 NJ |
1564 | free_n_data: |
1565 | kfree(n.data); | |
f4415848 NJ |
1566 | return rc; |
1567 | } | |
1568 | ||
af34983e HL |
1569 | int ksmbd_vfs_set_dos_attrib_xattr(struct user_namespace *user_ns, |
1570 | struct dentry *dentry, | |
070fb21e | 1571 | struct xattr_dos_attrib *da) |
f4415848 NJ |
1572 | { |
1573 | struct ndr n; | |
1574 | int err; | |
1575 | ||
1576 | err = ndr_encode_dos_attr(&n, da); | |
1577 | if (err) | |
1578 | return err; | |
1579 | ||
af34983e | 1580 | err = ksmbd_vfs_setxattr(user_ns, dentry, XATTR_NAME_DOS_ATTRIBUTE, |
070fb21e | 1581 | (void *)n.data, n.offset, 0); |
f4415848 NJ |
1582 | if (err) |
1583 | ksmbd_debug(SMB, "failed to store dos attribute in xattr\n"); | |
1584 | kfree(n.data); | |
1585 | ||
1586 | return err; | |
1587 | } | |
1588 | ||
af34983e HL |
1589 | int ksmbd_vfs_get_dos_attrib_xattr(struct user_namespace *user_ns, |
1590 | struct dentry *dentry, | |
070fb21e | 1591 | struct xattr_dos_attrib *da) |
f4415848 NJ |
1592 | { |
1593 | struct ndr n; | |
1594 | int err; | |
1595 | ||
af34983e | 1596 | err = ksmbd_vfs_getxattr(user_ns, dentry, XATTR_NAME_DOS_ATTRIBUTE, |
070fb21e | 1597 | (char **)&n.data); |
f4415848 NJ |
1598 | if (err > 0) { |
1599 | n.length = err; | |
1600 | if (ndr_decode_dos_attr(&n, da)) | |
1601 | err = -EINVAL; | |
79f6b11a | 1602 | kfree(n.data); |
64b39f4a | 1603 | } else { |
f4415848 | 1604 | ksmbd_debug(SMB, "failed to load dos attribute in xattr\n"); |
64b39f4a | 1605 | } |
f4415848 NJ |
1606 | |
1607 | return err; | |
1608 | } | |
1609 | ||
f4415848 NJ |
1610 | /** |
1611 | * ksmbd_vfs_init_kstat() - convert unix stat information to smb stat format | |
1612 | * @p: destination buffer | |
1613 | * @ksmbd_kstat: ksmbd kstat wrapper | |
1614 | */ | |
1615 | void *ksmbd_vfs_init_kstat(char **p, struct ksmbd_kstat *ksmbd_kstat) | |
1616 | { | |
1617 | struct file_directory_info *info = (struct file_directory_info *)(*p); | |
1618 | struct kstat *kstat = ksmbd_kstat->kstat; | |
1619 | u64 time; | |
1620 | ||
1621 | info->FileIndex = 0; | |
1622 | info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time); | |
1623 | time = ksmbd_UnixTimeToNT(kstat->atime); | |
1624 | info->LastAccessTime = cpu_to_le64(time); | |
1625 | time = ksmbd_UnixTimeToNT(kstat->mtime); | |
1626 | info->LastWriteTime = cpu_to_le64(time); | |
1627 | time = ksmbd_UnixTimeToNT(kstat->ctime); | |
1628 | info->ChangeTime = cpu_to_le64(time); | |
1629 | ||
26a2787d | 1630 | if (ksmbd_kstat->file_attributes & FILE_ATTRIBUTE_DIRECTORY_LE) { |
f4415848 NJ |
1631 | info->EndOfFile = 0; |
1632 | info->AllocationSize = 0; | |
1633 | } else { | |
1634 | info->EndOfFile = cpu_to_le64(kstat->size); | |
1635 | info->AllocationSize = cpu_to_le64(kstat->blocks << 9); | |
1636 | } | |
1637 | info->ExtFileAttributes = ksmbd_kstat->file_attributes; | |
1638 | ||
1639 | return info; | |
1640 | } | |
1641 | ||
af34983e HL |
1642 | int ksmbd_vfs_fill_dentry_attrs(struct ksmbd_work *work, |
1643 | struct user_namespace *user_ns, | |
1644 | struct dentry *dentry, | |
070fb21e | 1645 | struct ksmbd_kstat *ksmbd_kstat) |
f4415848 NJ |
1646 | { |
1647 | u64 time; | |
1648 | int rc; | |
1649 | ||
af34983e | 1650 | generic_fillattr(user_ns, d_inode(dentry), ksmbd_kstat->kstat); |
f4415848 NJ |
1651 | |
1652 | time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime); | |
1653 | ksmbd_kstat->create_time = time; | |
1654 | ||
1655 | /* | |
1656 | * set default value for the case that store dos attributes is not yes | |
1657 | * or that acl is disable in server's filesystem and the config is yes. | |
1658 | */ | |
1659 | if (S_ISDIR(ksmbd_kstat->kstat->mode)) | |
26a2787d | 1660 | ksmbd_kstat->file_attributes = FILE_ATTRIBUTE_DIRECTORY_LE; |
f4415848 | 1661 | else |
26a2787d | 1662 | ksmbd_kstat->file_attributes = FILE_ATTRIBUTE_ARCHIVE_LE; |
f4415848 NJ |
1663 | |
1664 | if (test_share_config_flag(work->tcon->share_conf, | |
64b39f4a | 1665 | KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) { |
f4415848 NJ |
1666 | struct xattr_dos_attrib da; |
1667 | ||
af34983e | 1668 | rc = ksmbd_vfs_get_dos_attrib_xattr(user_ns, dentry, &da); |
f4415848 NJ |
1669 | if (rc > 0) { |
1670 | ksmbd_kstat->file_attributes = cpu_to_le32(da.attr); | |
1671 | ksmbd_kstat->create_time = da.create_time; | |
64b39f4a | 1672 | } else { |
f4415848 | 1673 | ksmbd_debug(VFS, "fail to load dos attribute.\n"); |
64b39f4a | 1674 | } |
f4415848 NJ |
1675 | } |
1676 | ||
1677 | return 0; | |
1678 | } | |
1679 | ||
af34983e HL |
1680 | ssize_t ksmbd_vfs_casexattr_len(struct user_namespace *user_ns, |
1681 | struct dentry *dentry, char *attr_name, | |
070fb21e | 1682 | int attr_name_len) |
f4415848 NJ |
1683 | { |
1684 | char *name, *xattr_list = NULL; | |
1685 | ssize_t value_len = -ENOENT, xattr_list_len; | |
1686 | ||
1687 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
1688 | if (xattr_list_len <= 0) | |
1689 | goto out; | |
1690 | ||
1691 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
1692 | name += strlen(name) + 1) { | |
1693 | ksmbd_debug(VFS, "%s, len %zd\n", name, strlen(name)); | |
1694 | if (strncasecmp(attr_name, name, attr_name_len)) | |
1695 | continue; | |
1696 | ||
af34983e | 1697 | value_len = ksmbd_vfs_xattr_len(user_ns, dentry, name); |
f4415848 NJ |
1698 | break; |
1699 | } | |
1700 | ||
1701 | out: | |
79f6b11a | 1702 | kvfree(xattr_list); |
f4415848 NJ |
1703 | return value_len; |
1704 | } | |
1705 | ||
64b39f4a | 1706 | int ksmbd_vfs_xattr_stream_name(char *stream_name, char **xattr_stream_name, |
070fb21e | 1707 | size_t *xattr_stream_name_size, int s_type) |
f4415848 | 1708 | { |
07781de9 | 1709 | char *type, *buf; |
f4415848 NJ |
1710 | |
1711 | if (s_type == DIR_STREAM) | |
1712 | type = ":$INDEX_ALLOCATION"; | |
1713 | else | |
1714 | type = ":$DATA"; | |
1715 | ||
07781de9 DC |
1716 | buf = kasprintf(GFP_KERNEL, "%s%s%s", |
1717 | XATTR_NAME_STREAM, stream_name, type); | |
1718 | if (!buf) | |
f4415848 NJ |
1719 | return -ENOMEM; |
1720 | ||
07781de9 DC |
1721 | *xattr_stream_name = buf; |
1722 | *xattr_stream_name_size = strlen(buf) + 1; | |
f4415848 NJ |
1723 | |
1724 | return 0; | |
1725 | } | |
1726 | ||
f4415848 | 1727 | int ksmbd_vfs_copy_file_ranges(struct ksmbd_work *work, |
070fb21e NJ |
1728 | struct ksmbd_file *src_fp, |
1729 | struct ksmbd_file *dst_fp, | |
1730 | struct srv_copychunk *chunks, | |
1731 | unsigned int chunk_count, | |
1732 | unsigned int *chunk_count_written, | |
1733 | unsigned int *chunk_size_written, | |
1734 | loff_t *total_size_written) | |
f4415848 NJ |
1735 | { |
1736 | unsigned int i; | |
1737 | loff_t src_off, dst_off, src_file_size; | |
1738 | size_t len; | |
1739 | int ret; | |
1740 | ||
1741 | *chunk_count_written = 0; | |
1742 | *chunk_size_written = 0; | |
1743 | *total_size_written = 0; | |
1744 | ||
1745 | if (!(src_fp->daccess & (FILE_READ_DATA_LE | FILE_EXECUTE_LE))) { | |
493fa2fb | 1746 | pr_err("no right to read(%pd)\n", src_fp->filp->f_path.dentry); |
f4415848 NJ |
1747 | return -EACCES; |
1748 | } | |
1749 | if (!(dst_fp->daccess & (FILE_WRITE_DATA_LE | FILE_APPEND_DATA_LE))) { | |
493fa2fb | 1750 | pr_err("no right to write(%pd)\n", dst_fp->filp->f_path.dentry); |
f4415848 NJ |
1751 | return -EACCES; |
1752 | } | |
1753 | ||
1754 | if (ksmbd_stream_fd(src_fp) || ksmbd_stream_fd(dst_fp)) | |
1755 | return -EBADF; | |
1756 | ||
1757 | smb_break_all_levII_oplock(work, dst_fp, 1); | |
1758 | ||
c36fca86 NJ |
1759 | if (!work->tcon->posix_extensions) { |
1760 | for (i = 0; i < chunk_count; i++) { | |
1761 | src_off = le64_to_cpu(chunks[i].SourceOffset); | |
1762 | dst_off = le64_to_cpu(chunks[i].TargetOffset); | |
1763 | len = le32_to_cpu(chunks[i].Length); | |
1764 | ||
1765 | if (check_lock_range(src_fp->filp, src_off, | |
64b39f4a | 1766 | src_off + len - 1, READ)) |
c36fca86 NJ |
1767 | return -EAGAIN; |
1768 | if (check_lock_range(dst_fp->filp, dst_off, | |
64b39f4a | 1769 | dst_off + len - 1, WRITE)) |
c36fca86 NJ |
1770 | return -EAGAIN; |
1771 | } | |
f4415848 NJ |
1772 | } |
1773 | ||
1774 | src_file_size = i_size_read(file_inode(src_fp->filp)); | |
1775 | ||
1776 | for (i = 0; i < chunk_count; i++) { | |
1777 | src_off = le64_to_cpu(chunks[i].SourceOffset); | |
1778 | dst_off = le64_to_cpu(chunks[i].TargetOffset); | |
1779 | len = le32_to_cpu(chunks[i].Length); | |
1780 | ||
1781 | if (src_off + len > src_file_size) | |
1782 | return -E2BIG; | |
1783 | ||
f8524776 NJ |
1784 | ret = vfs_copy_file_range(src_fp->filp, src_off, |
1785 | dst_fp->filp, dst_off, len, 0); | |
868f9f2f AG |
1786 | if (ret == -EOPNOTSUPP || ret == -EXDEV) |
1787 | ret = generic_copy_file_range(src_fp->filp, src_off, | |
1788 | dst_fp->filp, dst_off, | |
1789 | len, 0); | |
f4415848 NJ |
1790 | if (ret < 0) |
1791 | return ret; | |
1792 | ||
1793 | *chunk_count_written += 1; | |
1794 | *total_size_written += ret; | |
1795 | } | |
1796 | return 0; | |
1797 | } | |
1798 | ||
45a64e8b | 1799 | void ksmbd_vfs_posix_lock_wait(struct file_lock *flock) |
f4415848 | 1800 | { |
45a64e8b | 1801 | wait_event(flock->fl_wait, !flock->fl_blocker); |
f4415848 NJ |
1802 | } |
1803 | ||
1804 | int ksmbd_vfs_posix_lock_wait_timeout(struct file_lock *flock, long timeout) | |
1805 | { | |
1806 | return wait_event_interruptible_timeout(flock->fl_wait, | |
1807 | !flock->fl_blocker, | |
1808 | timeout); | |
1809 | } | |
1810 | ||
1811 | void ksmbd_vfs_posix_lock_unblock(struct file_lock *flock) | |
1812 | { | |
1813 | locks_delete_block(flock); | |
1814 | } | |
1815 | ||
af34983e HL |
1816 | int ksmbd_vfs_set_init_posix_acl(struct user_namespace *user_ns, |
1817 | struct inode *inode) | |
f4415848 NJ |
1818 | { |
1819 | struct posix_acl_state acl_state; | |
1820 | struct posix_acl *acls; | |
1821 | int rc; | |
1822 | ||
777cad16 NJ |
1823 | if (!IS_ENABLED(CONFIG_FS_POSIX_ACL)) |
1824 | return -EOPNOTSUPP; | |
1825 | ||
f4415848 NJ |
1826 | ksmbd_debug(SMB, "Set posix acls\n"); |
1827 | rc = init_acl_state(&acl_state, 1); | |
1828 | if (rc) | |
1829 | return rc; | |
1830 | ||
1831 | /* Set default owner group */ | |
1832 | acl_state.owner.allow = (inode->i_mode & 0700) >> 6; | |
1833 | acl_state.group.allow = (inode->i_mode & 0070) >> 3; | |
1834 | acl_state.other.allow = inode->i_mode & 0007; | |
1835 | acl_state.users->aces[acl_state.users->n].uid = inode->i_uid; | |
1836 | acl_state.users->aces[acl_state.users->n++].perms.allow = | |
1837 | acl_state.owner.allow; | |
1838 | acl_state.groups->aces[acl_state.groups->n].gid = inode->i_gid; | |
1839 | acl_state.groups->aces[acl_state.groups->n++].perms.allow = | |
1840 | acl_state.group.allow; | |
1841 | acl_state.mask.allow = 0x07; | |
1842 | ||
67d1c432 | 1843 | acls = posix_acl_alloc(6, GFP_KERNEL); |
f4415848 NJ |
1844 | if (!acls) { |
1845 | free_acl_state(&acl_state); | |
1846 | return -ENOMEM; | |
1847 | } | |
1848 | posix_state_to_acl(&acl_state, acls->a_entries); | |
af34983e | 1849 | rc = set_posix_acl(user_ns, inode, ACL_TYPE_ACCESS, acls); |
f4415848 NJ |
1850 | if (rc < 0) |
1851 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_ACCESS) failed, rc : %d\n", | |
070fb21e | 1852 | rc); |
f4415848 NJ |
1853 | else if (S_ISDIR(inode->i_mode)) { |
1854 | posix_state_to_acl(&acl_state, acls->a_entries); | |
af34983e | 1855 | rc = set_posix_acl(user_ns, inode, ACL_TYPE_DEFAULT, |
67d1c432 | 1856 | acls); |
f4415848 NJ |
1857 | if (rc < 0) |
1858 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_DEFAULT) failed, rc : %d\n", | |
070fb21e | 1859 | rc); |
f4415848 NJ |
1860 | } |
1861 | free_acl_state(&acl_state); | |
1862 | posix_acl_release(acls); | |
1863 | return rc; | |
1864 | } | |
1865 | ||
af34983e HL |
1866 | int ksmbd_vfs_inherit_posix_acl(struct user_namespace *user_ns, |
1867 | struct inode *inode, struct inode *parent_inode) | |
f4415848 NJ |
1868 | { |
1869 | struct posix_acl *acls; | |
1870 | struct posix_acl_entry *pace; | |
1871 | int rc, i; | |
1872 | ||
777cad16 NJ |
1873 | if (!IS_ENABLED(CONFIG_FS_POSIX_ACL)) |
1874 | return -EOPNOTSUPP; | |
1875 | ||
67d1c432 | 1876 | acls = get_acl(parent_inode, ACL_TYPE_DEFAULT); |
f4415848 NJ |
1877 | if (!acls) |
1878 | return -ENOENT; | |
1879 | pace = acls->a_entries; | |
1880 | ||
1881 | for (i = 0; i < acls->a_count; i++, pace++) { | |
1882 | if (pace->e_tag == ACL_MASK) { | |
1883 | pace->e_perm = 0x07; | |
1884 | break; | |
1885 | } | |
1886 | } | |
1887 | ||
af34983e | 1888 | rc = set_posix_acl(user_ns, inode, ACL_TYPE_ACCESS, acls); |
f4415848 NJ |
1889 | if (rc < 0) |
1890 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_ACCESS) failed, rc : %d\n", | |
070fb21e | 1891 | rc); |
f4415848 | 1892 | if (S_ISDIR(inode->i_mode)) { |
af34983e | 1893 | rc = set_posix_acl(user_ns, inode, ACL_TYPE_DEFAULT, |
67d1c432 | 1894 | acls); |
f4415848 NJ |
1895 | if (rc < 0) |
1896 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_DEFAULT) failed, rc : %d\n", | |
070fb21e | 1897 | rc); |
f4415848 NJ |
1898 | } |
1899 | posix_acl_release(acls); | |
1900 | return rc; | |
1901 | } |