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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> | |
5970e15d | 9 | #include <linux/filelock.h> |
f4415848 NJ |
10 | #include <linux/uaccess.h> |
11 | #include <linux/backing-dev.h> | |
12 | #include <linux/writeback.h> | |
f4415848 NJ |
13 | #include <linux/xattr.h> |
14 | #include <linux/falloc.h> | |
f4415848 NJ |
15 | #include <linux/fsnotify.h> |
16 | #include <linux/dcache.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/vmalloc.h> | |
19 | #include <linux/sched/xacct.h> | |
20 | #include <linux/crc32c.h> | |
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; | |
87f00aba | 325 | struct file_lock_context *ctx = locks_inode_context(file_inode(filp)); |
f4415848 NJ |
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))) { | |
369c1634 | 381 | pr_err("no right to read(%pD)\n", fp->filp); |
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)) { |
369c1634 | 490 | pr_err("no right to write(%pD)\n", fp->filp); |
f4415848 NJ |
491 | err = -EACCES; |
492 | goto out; | |
493 | } | |
494 | } | |
495 | ||
496 | filp = fp->filp; | |
497 | ||
498 | if (ksmbd_stream_fd(fp)) { | |
499 | err = ksmbd_vfs_stream_write(fp, buf, pos, count); | |
500 | if (!err) | |
501 | *written = count; | |
502 | goto out; | |
503 | } | |
504 | ||
c36fca86 NJ |
505 | if (!work->tcon->posix_extensions) { |
506 | err = check_lock_range(filp, *pos, *pos + count - 1, WRITE); | |
507 | if (err) { | |
bde1694a | 508 | pr_err("unable to write due to lock\n"); |
c36fca86 NJ |
509 | err = -EAGAIN; |
510 | goto out; | |
511 | } | |
f4415848 NJ |
512 | } |
513 | ||
514 | /* Do we need to break any of a levelII oplock? */ | |
515 | smb_break_all_levII_oplock(work, fp, 1); | |
516 | ||
517 | err = kernel_write(filp, buf, count, pos); | |
518 | if (err < 0) { | |
519 | ksmbd_debug(VFS, "smb write failed, err = %d\n", err); | |
520 | goto out; | |
521 | } | |
522 | ||
523 | filp->f_pos = *pos; | |
524 | *written = err; | |
525 | err = 0; | |
526 | if (sync) { | |
527 | err = vfs_fsync_range(filp, offset, offset + *written, 0); | |
528 | if (err < 0) | |
369c1634 AV |
529 | pr_err("fsync failed for filename = %pD, err = %d\n", |
530 | fp->filp, err); | |
f4415848 NJ |
531 | } |
532 | ||
533 | out: | |
534 | return err; | |
535 | } | |
536 | ||
537 | /** | |
538 | * ksmbd_vfs_getattr() - vfs helper for smb getattr | |
539 | * @work: work | |
540 | * @fid: file id of open file | |
541 | * @attrs: inode attributes | |
542 | * | |
543 | * Return: 0 on success, otherwise error | |
544 | */ | |
c22180a5 | 545 | int ksmbd_vfs_getattr(const struct path *path, struct kstat *stat) |
f4415848 NJ |
546 | { |
547 | int err; | |
548 | ||
549 | err = vfs_getattr(path, stat, STATX_BTIME, AT_STATX_SYNC_AS_STAT); | |
550 | if (err) | |
bde1694a | 551 | pr_err("getattr failed, err %d\n", err); |
f4415848 NJ |
552 | return err; |
553 | } | |
554 | ||
555 | /** | |
556 | * ksmbd_vfs_fsync() - vfs helper for smb fsync | |
557 | * @work: work | |
558 | * @fid: file id of open file | |
559 | * | |
560 | * Return: 0 on success, otherwise error | |
561 | */ | |
64b39f4a | 562 | int ksmbd_vfs_fsync(struct ksmbd_work *work, u64 fid, u64 p_id) |
f4415848 NJ |
563 | { |
564 | struct ksmbd_file *fp; | |
565 | int err; | |
566 | ||
567 | fp = ksmbd_lookup_fd_slow(work, fid, p_id); | |
568 | if (!fp) { | |
bde1694a | 569 | pr_err("failed to get filp for fid %llu\n", fid); |
f4415848 NJ |
570 | return -ENOENT; |
571 | } | |
572 | err = vfs_fsync(fp->filp, 0); | |
573 | if (err < 0) | |
bde1694a | 574 | pr_err("smb fsync failed, err = %d\n", err); |
f4415848 NJ |
575 | ksmbd_fd_put(work, fp); |
576 | return err; | |
577 | } | |
578 | ||
579 | /** | |
580 | * ksmbd_vfs_remove_file() - vfs helper for smb rmdir or unlink | |
265fd199 | 581 | * @name: directory or file name that is relative to share |
f4415848 NJ |
582 | * |
583 | * Return: 0 on success, otherwise error | |
584 | */ | |
585 | int ksmbd_vfs_remove_file(struct ksmbd_work *work, char *name) | |
586 | { | |
da1e7ada | 587 | struct user_namespace *user_ns; |
7c3d3e99 | 588 | struct path path; |
333111a6 | 589 | struct dentry *parent; |
3161ad3a | 590 | int err; |
f4415848 | 591 | |
f4415848 NJ |
592 | if (ksmbd_override_fsids(work)) |
593 | return -ENOMEM; | |
594 | ||
265fd199 | 595 | err = ksmbd_vfs_kern_path(work, name, LOOKUP_NO_SYMLINKS, &path, false); |
f4415848 NJ |
596 | if (err) { |
597 | ksmbd_debug(VFS, "can't get %s, err %d\n", name, err); | |
598 | ksmbd_revert_fsids(work); | |
f4415848 NJ |
599 | return err; |
600 | } | |
601 | ||
da1e7ada | 602 | user_ns = mnt_user_ns(path.mnt); |
7c3d3e99 | 603 | parent = dget_parent(path.dentry); |
da1e7ada | 604 | err = ksmbd_vfs_lock_parent(user_ns, parent, path.dentry); |
333111a6 HL |
605 | if (err) { |
606 | dput(parent); | |
607 | path_put(&path); | |
608 | ksmbd_revert_fsids(work); | |
609 | return err; | |
f4415848 NJ |
610 | } |
611 | ||
333111a6 | 612 | if (!d_inode(path.dentry)->i_nlink) { |
f4415848 NJ |
613 | err = -ENOENT; |
614 | goto out_err; | |
615 | } | |
616 | ||
333111a6 | 617 | if (S_ISDIR(d_inode(path.dentry)->i_mode)) { |
da1e7ada | 618 | err = vfs_rmdir(user_ns, d_inode(parent), path.dentry); |
f4415848 NJ |
619 | if (err && err != -ENOTEMPTY) |
620 | ksmbd_debug(VFS, "%s: rmdir failed, err %d\n", name, | |
070fb21e | 621 | err); |
f4415848 | 622 | } else { |
da1e7ada | 623 | err = vfs_unlink(user_ns, d_inode(parent), path.dentry, NULL); |
f4415848 NJ |
624 | if (err) |
625 | ksmbd_debug(VFS, "%s: unlink failed, err %d\n", name, | |
070fb21e | 626 | err); |
f4415848 NJ |
627 | } |
628 | ||
f4415848 | 629 | out_err: |
7c3d3e99 NJ |
630 | inode_unlock(d_inode(parent)); |
631 | dput(parent); | |
632 | path_put(&path); | |
f4415848 NJ |
633 | ksmbd_revert_fsids(work); |
634 | return err; | |
635 | } | |
636 | ||
637 | /** | |
638 | * ksmbd_vfs_link() - vfs helper for creating smb hardlink | |
639 | * @oldname: source file name | |
265fd199 | 640 | * @newname: hardlink name that is relative to share |
f4415848 NJ |
641 | * |
642 | * Return: 0 on success, otherwise error | |
643 | */ | |
64b39f4a | 644 | int ksmbd_vfs_link(struct ksmbd_work *work, const char *oldname, |
070fb21e | 645 | const char *newname) |
f4415848 NJ |
646 | { |
647 | struct path oldpath, newpath; | |
648 | struct dentry *dentry; | |
649 | int err; | |
650 | ||
651 | if (ksmbd_override_fsids(work)) | |
652 | return -ENOMEM; | |
653 | ||
4ea47798 | 654 | err = kern_path(oldname, LOOKUP_NO_SYMLINKS, &oldpath); |
f4415848 | 655 | if (err) { |
bde1694a NJ |
656 | pr_err("cannot get linux path for %s, err = %d\n", |
657 | oldname, err); | |
f4415848 NJ |
658 | goto out1; |
659 | } | |
660 | ||
265fd199 HL |
661 | dentry = ksmbd_vfs_kern_path_create(work, newname, |
662 | LOOKUP_NO_SYMLINKS | LOOKUP_REVAL, | |
663 | &newpath); | |
f4415848 NJ |
664 | if (IS_ERR(dentry)) { |
665 | err = PTR_ERR(dentry); | |
bde1694a | 666 | pr_err("path create err for %s, err %d\n", newname, err); |
f4415848 NJ |
667 | goto out2; |
668 | } | |
669 | ||
670 | err = -EXDEV; | |
671 | if (oldpath.mnt != newpath.mnt) { | |
bde1694a | 672 | pr_err("vfs_link failed err %d\n", err); |
f4415848 NJ |
673 | goto out3; |
674 | } | |
675 | ||
af34983e HL |
676 | err = vfs_link(oldpath.dentry, mnt_user_ns(newpath.mnt), |
677 | d_inode(newpath.dentry), | |
070fb21e | 678 | dentry, NULL); |
f4415848 NJ |
679 | if (err) |
680 | ksmbd_debug(VFS, "vfs_link failed err %d\n", err); | |
681 | ||
682 | out3: | |
683 | done_path_create(&newpath, dentry); | |
684 | out2: | |
685 | path_put(&oldpath); | |
686 | out1: | |
687 | ksmbd_revert_fsids(work); | |
688 | return err; | |
689 | } | |
690 | ||
4b637fc1 NJ |
691 | static int ksmbd_validate_entry_in_use(struct dentry *src_dent) |
692 | { | |
693 | struct dentry *dst_dent; | |
694 | ||
695 | spin_lock(&src_dent->d_lock); | |
696 | list_for_each_entry(dst_dent, &src_dent->d_subdirs, d_child) { | |
697 | struct ksmbd_file *child_fp; | |
698 | ||
699 | if (d_really_is_negative(dst_dent)) | |
700 | continue; | |
701 | ||
702 | child_fp = ksmbd_lookup_fd_inode(d_inode(dst_dent)); | |
703 | if (child_fp) { | |
704 | spin_unlock(&src_dent->d_lock); | |
705 | ksmbd_debug(VFS, "Forbid rename, sub file/dir is in use\n"); | |
706 | return -EACCES; | |
707 | } | |
708 | } | |
709 | spin_unlock(&src_dent->d_lock); | |
710 | ||
711 | return 0; | |
712 | } | |
713 | ||
f4415848 | 714 | static int __ksmbd_vfs_rename(struct ksmbd_work *work, |
af34983e | 715 | struct user_namespace *src_user_ns, |
070fb21e NJ |
716 | struct dentry *src_dent_parent, |
717 | struct dentry *src_dent, | |
af34983e | 718 | struct user_namespace *dst_user_ns, |
070fb21e NJ |
719 | struct dentry *dst_dent_parent, |
720 | struct dentry *trap_dent, | |
721 | char *dst_name) | |
f4415848 NJ |
722 | { |
723 | struct dentry *dst_dent; | |
724 | int err; | |
725 | ||
c36fca86 | 726 | if (!work->tcon->posix_extensions) { |
4b637fc1 NJ |
727 | err = ksmbd_validate_entry_in_use(src_dent); |
728 | if (err) | |
729 | return err; | |
f4415848 | 730 | } |
f4415848 NJ |
731 | |
732 | if (d_really_is_negative(src_dent_parent)) | |
733 | return -ENOENT; | |
734 | if (d_really_is_negative(dst_dent_parent)) | |
735 | return -ENOENT; | |
736 | if (d_really_is_negative(src_dent)) | |
737 | return -ENOENT; | |
738 | if (src_dent == trap_dent) | |
739 | return -EINVAL; | |
740 | ||
741 | if (ksmbd_override_fsids(work)) | |
742 | return -ENOMEM; | |
743 | ||
da1e7ada CB |
744 | dst_dent = lookup_one(dst_user_ns, dst_name, dst_dent_parent, |
745 | strlen(dst_name)); | |
f4415848 NJ |
746 | err = PTR_ERR(dst_dent); |
747 | if (IS_ERR(dst_dent)) { | |
bde1694a | 748 | pr_err("lookup failed %s [%d]\n", dst_name, err); |
f4415848 NJ |
749 | goto out; |
750 | } | |
751 | ||
752 | err = -ENOTEMPTY; | |
753 | if (dst_dent != trap_dent && !d_really_is_positive(dst_dent)) { | |
754 | struct renamedata rd = { | |
af34983e | 755 | .old_mnt_userns = src_user_ns, |
f4415848 NJ |
756 | .old_dir = d_inode(src_dent_parent), |
757 | .old_dentry = src_dent, | |
af34983e | 758 | .new_mnt_userns = dst_user_ns, |
f4415848 NJ |
759 | .new_dir = d_inode(dst_dent_parent), |
760 | .new_dentry = dst_dent, | |
761 | }; | |
762 | err = vfs_rename(&rd); | |
763 | } | |
764 | if (err) | |
bde1694a | 765 | pr_err("vfs_rename failed err %d\n", err); |
f4415848 NJ |
766 | if (dst_dent) |
767 | dput(dst_dent); | |
768 | out: | |
769 | ksmbd_revert_fsids(work); | |
770 | return err; | |
771 | } | |
772 | ||
773 | int ksmbd_vfs_fp_rename(struct ksmbd_work *work, struct ksmbd_file *fp, | |
070fb21e | 774 | char *newname) |
f4415848 | 775 | { |
da1e7ada | 776 | struct user_namespace *user_ns; |
f4415848 NJ |
777 | struct path dst_path; |
778 | struct dentry *src_dent_parent, *dst_dent_parent; | |
ff1d5727 | 779 | struct dentry *src_dent, *trap_dent, *src_child; |
f4415848 NJ |
780 | char *dst_name; |
781 | int err; | |
782 | ||
783 | dst_name = extract_last_component(newname); | |
265fd199 HL |
784 | if (!dst_name) { |
785 | dst_name = newname; | |
786 | newname = ""; | |
787 | } | |
f4415848 NJ |
788 | |
789 | src_dent_parent = dget_parent(fp->filp->f_path.dentry); | |
f4415848 | 790 | src_dent = fp->filp->f_path.dentry; |
f4415848 | 791 | |
265fd199 HL |
792 | err = ksmbd_vfs_kern_path(work, newname, |
793 | LOOKUP_NO_SYMLINKS | LOOKUP_DIRECTORY, | |
794 | &dst_path, false); | |
f4415848 NJ |
795 | if (err) { |
796 | ksmbd_debug(VFS, "Cannot get path for %s [%d]\n", newname, err); | |
797 | goto out; | |
798 | } | |
799 | dst_dent_parent = dst_path.dentry; | |
f4415848 NJ |
800 | |
801 | trap_dent = lock_rename(src_dent_parent, dst_dent_parent); | |
ff1d5727 NJ |
802 | dget(src_dent); |
803 | dget(dst_dent_parent); | |
da1e7ada CB |
804 | user_ns = file_mnt_user_ns(fp->filp); |
805 | src_child = lookup_one(user_ns, src_dent->d_name.name, src_dent_parent, | |
806 | src_dent->d_name.len); | |
ff1d5727 NJ |
807 | if (IS_ERR(src_child)) { |
808 | err = PTR_ERR(src_child); | |
809 | goto out_lock; | |
810 | } | |
811 | ||
812 | if (src_child != src_dent) { | |
813 | err = -ESTALE; | |
814 | dput(src_child); | |
815 | goto out_lock; | |
816 | } | |
817 | dput(src_child); | |
818 | ||
f4415848 | 819 | err = __ksmbd_vfs_rename(work, |
da1e7ada | 820 | user_ns, |
f4415848 NJ |
821 | src_dent_parent, |
822 | src_dent, | |
af34983e | 823 | mnt_user_ns(dst_path.mnt), |
f4415848 NJ |
824 | dst_dent_parent, |
825 | trap_dent, | |
826 | dst_name); | |
ff1d5727 NJ |
827 | out_lock: |
828 | dput(src_dent); | |
f4415848 | 829 | dput(dst_dent_parent); |
ff1d5727 | 830 | unlock_rename(src_dent_parent, dst_dent_parent); |
f4415848 NJ |
831 | path_put(&dst_path); |
832 | out: | |
f4415848 NJ |
833 | dput(src_dent_parent); |
834 | return err; | |
835 | } | |
836 | ||
837 | /** | |
838 | * ksmbd_vfs_truncate() - vfs helper for smb file truncate | |
839 | * @work: work | |
f4415848 NJ |
840 | * @fid: file id of old file |
841 | * @size: truncate to given size | |
842 | * | |
843 | * Return: 0 on success, otherwise error | |
844 | */ | |
265fd199 | 845 | int ksmbd_vfs_truncate(struct ksmbd_work *work, |
070fb21e | 846 | struct ksmbd_file *fp, loff_t size) |
f4415848 | 847 | { |
f4415848 | 848 | int err = 0; |
265fd199 | 849 | struct file *filp; |
f4415848 | 850 | |
265fd199 | 851 | filp = fp->filp; |
f4415848 | 852 | |
265fd199 HL |
853 | /* Do we need to break any of a levelII oplock? */ |
854 | smb_break_all_levII_oplock(work, fp, 1); | |
c36fca86 | 855 | |
265fd199 HL |
856 | if (!work->tcon->posix_extensions) { |
857 | struct inode *inode = file_inode(filp); | |
858 | ||
859 | if (size < inode->i_size) { | |
860 | err = check_lock_range(filp, size, | |
861 | inode->i_size - 1, WRITE); | |
862 | } else { | |
863 | err = check_lock_range(filp, inode->i_size, | |
864 | size - 1, WRITE); | |
f4415848 NJ |
865 | } |
866 | ||
265fd199 HL |
867 | if (err) { |
868 | pr_err("failed due to lock\n"); | |
869 | return -EAGAIN; | |
870 | } | |
f4415848 NJ |
871 | } |
872 | ||
265fd199 HL |
873 | err = vfs_truncate(&filp->f_path, size); |
874 | if (err) | |
50f500b7 | 875 | pr_err("truncate failed, err %d\n", err); |
f4415848 NJ |
876 | return err; |
877 | } | |
878 | ||
879 | /** | |
880 | * ksmbd_vfs_listxattr() - vfs helper for smb list extended attributes | |
881 | * @dentry: dentry of file for listing xattrs | |
882 | * @list: destination buffer | |
883 | * @size: destination buffer length | |
884 | * | |
885 | * Return: xattr list length on success, otherwise error | |
886 | */ | |
887 | ssize_t ksmbd_vfs_listxattr(struct dentry *dentry, char **list) | |
888 | { | |
889 | ssize_t size; | |
890 | char *vlist = NULL; | |
891 | ||
892 | size = vfs_listxattr(dentry, NULL, 0); | |
893 | if (size <= 0) | |
894 | return size; | |
895 | ||
79f6b11a | 896 | vlist = kvmalloc(size, GFP_KERNEL | __GFP_ZERO); |
f4415848 NJ |
897 | if (!vlist) |
898 | return -ENOMEM; | |
899 | ||
900 | *list = vlist; | |
901 | size = vfs_listxattr(dentry, vlist, size); | |
902 | if (size < 0) { | |
903 | ksmbd_debug(VFS, "listxattr failed\n"); | |
79f6b11a | 904 | kvfree(vlist); |
f4415848 NJ |
905 | *list = NULL; |
906 | } | |
907 | ||
908 | return size; | |
909 | } | |
910 | ||
af34983e HL |
911 | static ssize_t ksmbd_vfs_xattr_len(struct user_namespace *user_ns, |
912 | struct dentry *dentry, char *xattr_name) | |
f4415848 | 913 | { |
af34983e | 914 | return vfs_getxattr(user_ns, dentry, xattr_name, NULL, 0); |
f4415848 NJ |
915 | } |
916 | ||
917 | /** | |
918 | * ksmbd_vfs_getxattr() - vfs helper for smb get extended attributes value | |
af34983e | 919 | * @user_ns: user namespace |
f4415848 NJ |
920 | * @dentry: dentry of file for getting xattrs |
921 | * @xattr_name: name of xattr name to query | |
922 | * @xattr_buf: destination buffer xattr value | |
923 | * | |
924 | * Return: read xattr value length on success, otherwise error | |
925 | */ | |
af34983e HL |
926 | ssize_t ksmbd_vfs_getxattr(struct user_namespace *user_ns, |
927 | struct dentry *dentry, | |
928 | char *xattr_name, char **xattr_buf) | |
f4415848 NJ |
929 | { |
930 | ssize_t xattr_len; | |
931 | char *buf; | |
932 | ||
933 | *xattr_buf = NULL; | |
af34983e | 934 | xattr_len = ksmbd_vfs_xattr_len(user_ns, dentry, xattr_name); |
f4415848 NJ |
935 | if (xattr_len < 0) |
936 | return xattr_len; | |
937 | ||
938 | buf = kmalloc(xattr_len + 1, GFP_KERNEL); | |
939 | if (!buf) | |
940 | return -ENOMEM; | |
941 | ||
af34983e | 942 | xattr_len = vfs_getxattr(user_ns, dentry, xattr_name, |
d7e5852b | 943 | (void *)buf, xattr_len); |
f4415848 NJ |
944 | if (xattr_len > 0) |
945 | *xattr_buf = buf; | |
946 | else | |
947 | kfree(buf); | |
948 | return xattr_len; | |
949 | } | |
950 | ||
951 | /** | |
952 | * ksmbd_vfs_setxattr() - vfs helper for smb set extended attributes value | |
af34983e | 953 | * @user_ns: user namespace |
f4415848 NJ |
954 | * @dentry: dentry to set XATTR at |
955 | * @name: xattr name for setxattr | |
956 | * @value: xattr value to set | |
957 | * @size: size of xattr value | |
958 | * @flags: destination buffer length | |
959 | * | |
960 | * Return: 0 on success, otherwise error | |
961 | */ | |
af34983e HL |
962 | int ksmbd_vfs_setxattr(struct user_namespace *user_ns, |
963 | struct dentry *dentry, const char *attr_name, | |
0c5fd887 | 964 | void *attr_value, size_t attr_size, int flags) |
f4415848 NJ |
965 | { |
966 | int err; | |
967 | ||
af34983e HL |
968 | err = vfs_setxattr(user_ns, |
969 | dentry, | |
f4415848 NJ |
970 | attr_name, |
971 | attr_value, | |
972 | attr_size, | |
973 | flags); | |
974 | if (err) | |
975 | ksmbd_debug(VFS, "setxattr failed, err %d\n", err); | |
976 | return err; | |
977 | } | |
978 | ||
979 | /** | |
980 | * ksmbd_vfs_set_fadvise() - convert smb IO caching options to linux options | |
981 | * @filp: file pointer for IO | |
982 | * @options: smb IO options | |
983 | */ | |
984 | void ksmbd_vfs_set_fadvise(struct file *filp, __le32 option) | |
985 | { | |
986 | struct address_space *mapping; | |
987 | ||
988 | mapping = filp->f_mapping; | |
989 | ||
990 | if (!option || !mapping) | |
991 | return; | |
992 | ||
64b39f4a | 993 | if (option & FILE_WRITE_THROUGH_LE) { |
f4415848 | 994 | filp->f_flags |= O_SYNC; |
64b39f4a | 995 | } else if (option & FILE_SEQUENTIAL_ONLY_LE) { |
f4415848 NJ |
996 | filp->f_ra.ra_pages = inode_to_bdi(mapping->host)->ra_pages * 2; |
997 | spin_lock(&filp->f_lock); | |
998 | filp->f_mode &= ~FMODE_RANDOM; | |
999 | spin_unlock(&filp->f_lock); | |
1000 | } else if (option & FILE_RANDOM_ACCESS_LE) { | |
1001 | spin_lock(&filp->f_lock); | |
1002 | filp->f_mode |= FMODE_RANDOM; | |
1003 | spin_unlock(&filp->f_lock); | |
1004 | } | |
1005 | } | |
1006 | ||
64b39f4a | 1007 | int ksmbd_vfs_zero_data(struct ksmbd_work *work, struct ksmbd_file *fp, |
070fb21e | 1008 | loff_t off, loff_t len) |
f4415848 NJ |
1009 | { |
1010 | smb_break_all_levII_oplock(work, fp, 1); | |
26a2787d | 1011 | if (fp->f_ci->m_fattr & FILE_ATTRIBUTE_SPARSE_FILE_LE) |
f4415848 | 1012 | return vfs_fallocate(fp->filp, |
070fb21e NJ |
1013 | FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, |
1014 | off, len); | |
f4415848 | 1015 | |
18e39fb9 NJ |
1016 | return vfs_fallocate(fp->filp, |
1017 | FALLOC_FL_ZERO_RANGE | FALLOC_FL_KEEP_SIZE, | |
1018 | off, len); | |
f4415848 NJ |
1019 | } |
1020 | ||
1021 | int ksmbd_vfs_fqar_lseek(struct ksmbd_file *fp, loff_t start, loff_t length, | |
070fb21e | 1022 | struct file_allocated_range_buffer *ranges, |
f7db8fd0 | 1023 | unsigned int in_count, unsigned int *out_count) |
f4415848 NJ |
1024 | { |
1025 | struct file *f = fp->filp; | |
ab0b263b | 1026 | struct inode *inode = file_inode(fp->filp); |
f4415848 NJ |
1027 | loff_t maxbytes = (u64)inode->i_sb->s_maxbytes, end; |
1028 | loff_t extent_start, extent_end; | |
1029 | int ret = 0; | |
1030 | ||
1031 | if (start > maxbytes) | |
1032 | return -EFBIG; | |
1033 | ||
1034 | if (!in_count) | |
1035 | return 0; | |
1036 | ||
1037 | /* | |
1038 | * Shrink request scope to what the fs can actually handle. | |
1039 | */ | |
1040 | if (length > maxbytes || (maxbytes - length) < start) | |
1041 | length = maxbytes - start; | |
1042 | ||
1043 | if (start + length > inode->i_size) | |
1044 | length = inode->i_size - start; | |
1045 | ||
1046 | *out_count = 0; | |
1047 | end = start + length; | |
1048 | while (start < end && *out_count < in_count) { | |
067baa9a | 1049 | extent_start = vfs_llseek(f, start, SEEK_DATA); |
f4415848 NJ |
1050 | if (extent_start < 0) { |
1051 | if (extent_start != -ENXIO) | |
1052 | ret = (int)extent_start; | |
1053 | break; | |
1054 | } | |
1055 | ||
1056 | if (extent_start >= end) | |
1057 | break; | |
1058 | ||
067baa9a | 1059 | extent_end = vfs_llseek(f, extent_start, SEEK_HOLE); |
f4415848 NJ |
1060 | if (extent_end < 0) { |
1061 | if (extent_end != -ENXIO) | |
1062 | ret = (int)extent_end; | |
1063 | break; | |
64b39f4a | 1064 | } else if (extent_start >= extent_end) { |
f4415848 | 1065 | break; |
64b39f4a | 1066 | } |
f4415848 NJ |
1067 | |
1068 | ranges[*out_count].file_offset = cpu_to_le64(extent_start); | |
1069 | ranges[(*out_count)++].length = | |
1070 | cpu_to_le64(min(extent_end, end) - extent_start); | |
1071 | ||
1072 | start = extent_end; | |
1073 | } | |
1074 | ||
1075 | return ret; | |
1076 | } | |
1077 | ||
af34983e HL |
1078 | int ksmbd_vfs_remove_xattr(struct user_namespace *user_ns, |
1079 | struct dentry *dentry, char *attr_name) | |
f4415848 | 1080 | { |
af34983e | 1081 | return vfs_removexattr(user_ns, dentry, attr_name); |
f4415848 NJ |
1082 | } |
1083 | ||
af34983e HL |
1084 | int ksmbd_vfs_unlink(struct user_namespace *user_ns, |
1085 | struct dentry *dir, struct dentry *dentry) | |
f4415848 NJ |
1086 | { |
1087 | int err = 0; | |
1088 | ||
da1e7ada | 1089 | err = ksmbd_vfs_lock_parent(user_ns, dir, dentry); |
333111a6 HL |
1090 | if (err) |
1091 | return err; | |
ff1d5727 | 1092 | dget(dentry); |
f4415848 NJ |
1093 | |
1094 | if (S_ISDIR(d_inode(dentry)->i_mode)) | |
af34983e | 1095 | err = vfs_rmdir(user_ns, d_inode(dir), dentry); |
f4415848 | 1096 | else |
af34983e | 1097 | err = vfs_unlink(user_ns, d_inode(dir), dentry, NULL); |
f4415848 | 1098 | |
f4415848 | 1099 | dput(dentry); |
ff1d5727 | 1100 | inode_unlock(d_inode(dir)); |
f4415848 NJ |
1101 | if (err) |
1102 | ksmbd_debug(VFS, "failed to delete, err %d\n", err); | |
1103 | ||
1104 | return err; | |
1105 | } | |
1106 | ||
25885a35 | 1107 | static bool __dir_empty(struct dir_context *ctx, const char *name, int namlen, |
070fb21e | 1108 | loff_t offset, u64 ino, unsigned int d_type) |
f4415848 NJ |
1109 | { |
1110 | struct ksmbd_readdir_data *buf; | |
1111 | ||
1112 | buf = container_of(ctx, struct ksmbd_readdir_data, ctx); | |
1113 | buf->dirent_count++; | |
1114 | ||
25885a35 | 1115 | return buf->dirent_count <= 2; |
f4415848 NJ |
1116 | } |
1117 | ||
1118 | /** | |
1119 | * ksmbd_vfs_empty_dir() - check for empty directory | |
1120 | * @fp: ksmbd file pointer | |
1121 | * | |
1122 | * Return: true if directory empty, otherwise false | |
1123 | */ | |
1124 | int ksmbd_vfs_empty_dir(struct ksmbd_file *fp) | |
1125 | { | |
1126 | int err; | |
1127 | struct ksmbd_readdir_data readdir_data; | |
1128 | ||
1129 | memset(&readdir_data, 0, sizeof(struct ksmbd_readdir_data)); | |
1130 | ||
1131 | set_ctx_actor(&readdir_data.ctx, __dir_empty); | |
1132 | readdir_data.dirent_count = 0; | |
1133 | ||
e8c06191 | 1134 | err = iterate_dir(fp->filp, &readdir_data.ctx); |
f4415848 NJ |
1135 | if (readdir_data.dirent_count > 2) |
1136 | err = -ENOTEMPTY; | |
1137 | else | |
1138 | err = 0; | |
1139 | return err; | |
1140 | } | |
1141 | ||
25885a35 | 1142 | static bool __caseless_lookup(struct dir_context *ctx, const char *name, |
070fb21e NJ |
1143 | int namlen, loff_t offset, u64 ino, |
1144 | unsigned int d_type) | |
f4415848 NJ |
1145 | { |
1146 | struct ksmbd_readdir_data *buf; | |
dbab80e2 | 1147 | int cmp = -EINVAL; |
f4415848 NJ |
1148 | |
1149 | buf = container_of(ctx, struct ksmbd_readdir_data, ctx); | |
1150 | ||
1151 | if (buf->used != namlen) | |
25885a35 | 1152 | return true; |
dbab80e2 AH |
1153 | if (IS_ENABLED(CONFIG_UNICODE) && buf->um) { |
1154 | const struct qstr q_buf = {.name = buf->private, | |
1155 | .len = buf->used}; | |
1156 | const struct qstr q_name = {.name = name, | |
1157 | .len = namlen}; | |
1158 | ||
1159 | cmp = utf8_strncasecmp(buf->um, &q_buf, &q_name); | |
1160 | } | |
1161 | if (cmp < 0) | |
1162 | cmp = strncasecmp((char *)buf->private, name, namlen); | |
1163 | if (!cmp) { | |
f4415848 NJ |
1164 | memcpy((char *)buf->private, name, namlen); |
1165 | buf->dirent_count = 1; | |
25885a35 | 1166 | return false; |
f4415848 | 1167 | } |
25885a35 | 1168 | return true; |
f4415848 NJ |
1169 | } |
1170 | ||
1171 | /** | |
1172 | * ksmbd_vfs_lookup_in_dir() - lookup a file in a directory | |
3c203783 HL |
1173 | * @dir: path info |
1174 | * @name: filename to lookup | |
1175 | * @namelen: filename length | |
f4415848 NJ |
1176 | * |
1177 | * Return: 0 on success, otherwise error | |
1178 | */ | |
dbab80e2 AH |
1179 | static int ksmbd_vfs_lookup_in_dir(const struct path *dir, char *name, |
1180 | size_t namelen, struct unicode_map *um) | |
f4415848 | 1181 | { |
f4415848 NJ |
1182 | int ret; |
1183 | struct file *dfilp; | |
64b39f4a | 1184 | int flags = O_RDONLY | O_LARGEFILE; |
f4415848 NJ |
1185 | struct ksmbd_readdir_data readdir_data = { |
1186 | .ctx.actor = __caseless_lookup, | |
3c203783 HL |
1187 | .private = name, |
1188 | .used = namelen, | |
1189 | .dirent_count = 0, | |
dbab80e2 | 1190 | .um = um, |
f4415848 NJ |
1191 | }; |
1192 | ||
3c203783 HL |
1193 | dfilp = dentry_open(dir, flags, current_cred()); |
1194 | if (IS_ERR(dfilp)) | |
1195 | return PTR_ERR(dfilp); | |
f4415848 | 1196 | |
e8c06191 | 1197 | ret = iterate_dir(dfilp, &readdir_data.ctx); |
f4415848 NJ |
1198 | if (readdir_data.dirent_count > 0) |
1199 | ret = 0; | |
f4415848 | 1200 | fput(dfilp); |
f4415848 NJ |
1201 | return ret; |
1202 | } | |
1203 | ||
1204 | /** | |
1205 | * ksmbd_vfs_kern_path() - lookup a file and get path info | |
265fd199 | 1206 | * @name: file path that is relative to share |
f4415848 NJ |
1207 | * @flags: lookup flags |
1208 | * @path: if lookup succeed, return path info | |
1209 | * @caseless: caseless filename lookup | |
1210 | * | |
1211 | * Return: 0 on success, otherwise error | |
1212 | */ | |
265fd199 HL |
1213 | int ksmbd_vfs_kern_path(struct ksmbd_work *work, char *name, |
1214 | unsigned int flags, struct path *path, bool caseless) | |
f4415848 | 1215 | { |
265fd199 | 1216 | struct ksmbd_share_config *share_conf = work->tcon->share_conf; |
f4415848 NJ |
1217 | int err; |
1218 | ||
265fd199 HL |
1219 | flags |= LOOKUP_BENEATH; |
1220 | err = vfs_path_lookup(share_conf->vfs_path.dentry, | |
1221 | share_conf->vfs_path.mnt, | |
1222 | name, | |
1223 | flags, | |
1224 | path); | |
f4415848 | 1225 | if (!err) |
3c203783 | 1226 | return 0; |
f4415848 NJ |
1227 | |
1228 | if (caseless) { | |
3c203783 HL |
1229 | char *filepath; |
1230 | struct path parent; | |
1231 | size_t path_len, remain_len; | |
f4415848 | 1232 | |
3c203783 HL |
1233 | filepath = kstrdup(name, GFP_KERNEL); |
1234 | if (!filepath) | |
1235 | return -ENOMEM; | |
1236 | ||
1237 | path_len = strlen(filepath); | |
265fd199 | 1238 | remain_len = path_len; |
f4415848 | 1239 | |
265fd199 HL |
1240 | parent = share_conf->vfs_path; |
1241 | path_get(&parent); | |
f4415848 | 1242 | |
3c203783 HL |
1243 | while (d_can_lookup(parent.dentry)) { |
1244 | char *filename = filepath + path_len - remain_len; | |
1245 | char *next = strchrnul(filename, '/'); | |
1246 | size_t filename_len = next - filename; | |
1247 | bool is_last = !next[0]; | |
1248 | ||
1249 | if (filename_len == 0) | |
1250 | break; | |
1251 | ||
1252 | err = ksmbd_vfs_lookup_in_dir(&parent, filename, | |
dbab80e2 AH |
1253 | filename_len, |
1254 | work->conn->um); | |
265fd199 HL |
1255 | path_put(&parent); |
1256 | if (err) | |
3c203783 | 1257 | goto out; |
3c203783 | 1258 | |
3c203783 HL |
1259 | next[0] = '\0'; |
1260 | ||
265fd199 HL |
1261 | err = vfs_path_lookup(share_conf->vfs_path.dentry, |
1262 | share_conf->vfs_path.mnt, | |
1263 | filepath, | |
1264 | flags, | |
1265 | &parent); | |
3c203783 HL |
1266 | if (err) |
1267 | goto out; | |
265fd199 HL |
1268 | else if (is_last) { |
1269 | *path = parent; | |
3c203783 HL |
1270 | goto out; |
1271 | } | |
1272 | ||
1273 | next[0] = '/'; | |
1274 | remain_len -= filename_len + 1; | |
1275 | } | |
1276 | ||
1277 | path_put(&parent); | |
1278 | err = -EINVAL; | |
f4415848 | 1279 | out: |
3c203783 HL |
1280 | kfree(filepath); |
1281 | } | |
f4415848 NJ |
1282 | return err; |
1283 | } | |
1284 | ||
265fd199 HL |
1285 | struct dentry *ksmbd_vfs_kern_path_create(struct ksmbd_work *work, |
1286 | const char *name, | |
1287 | unsigned int flags, | |
1288 | struct path *path) | |
1289 | { | |
1290 | char *abs_name; | |
1291 | struct dentry *dent; | |
1292 | ||
1293 | abs_name = convert_to_unix_name(work->tcon->share_conf, name); | |
1294 | if (!abs_name) | |
1295 | return ERR_PTR(-ENOMEM); | |
1296 | ||
1297 | dent = kern_path_create(AT_FDCWD, abs_name, path, flags); | |
1298 | kfree(abs_name); | |
1299 | return dent; | |
1300 | } | |
1301 | ||
af34983e HL |
1302 | int ksmbd_vfs_remove_acl_xattrs(struct user_namespace *user_ns, |
1303 | struct dentry *dentry) | |
f4415848 NJ |
1304 | { |
1305 | char *name, *xattr_list = NULL; | |
1306 | ssize_t xattr_list_len; | |
1307 | int err = 0; | |
1308 | ||
1309 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
1310 | if (xattr_list_len < 0) { | |
1311 | goto out; | |
1312 | } else if (!xattr_list_len) { | |
1313 | ksmbd_debug(SMB, "empty xattr in the file\n"); | |
1314 | goto out; | |
1315 | } | |
1316 | ||
1317 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
070fb21e | 1318 | name += strlen(name) + 1) { |
f4415848 NJ |
1319 | ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name)); |
1320 | ||
1321 | if (!strncmp(name, XATTR_NAME_POSIX_ACL_ACCESS, | |
64b39f4a | 1322 | sizeof(XATTR_NAME_POSIX_ACL_ACCESS) - 1) || |
f4415848 | 1323 | !strncmp(name, XATTR_NAME_POSIX_ACL_DEFAULT, |
64b39f4a | 1324 | sizeof(XATTR_NAME_POSIX_ACL_DEFAULT) - 1)) { |
b82784a2 | 1325 | err = vfs_remove_acl(user_ns, dentry, name); |
f4415848 NJ |
1326 | if (err) |
1327 | ksmbd_debug(SMB, | |
070fb21e | 1328 | "remove acl xattr failed : %s\n", name); |
f4415848 NJ |
1329 | } |
1330 | } | |
1331 | out: | |
79f6b11a | 1332 | kvfree(xattr_list); |
f4415848 NJ |
1333 | return err; |
1334 | } | |
1335 | ||
af34983e HL |
1336 | int ksmbd_vfs_remove_sd_xattrs(struct user_namespace *user_ns, |
1337 | struct dentry *dentry) | |
f4415848 NJ |
1338 | { |
1339 | char *name, *xattr_list = NULL; | |
1340 | ssize_t xattr_list_len; | |
1341 | int err = 0; | |
1342 | ||
1343 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
1344 | if (xattr_list_len < 0) { | |
1345 | goto out; | |
1346 | } else if (!xattr_list_len) { | |
1347 | ksmbd_debug(SMB, "empty xattr in the file\n"); | |
1348 | goto out; | |
1349 | } | |
1350 | ||
1351 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
1352 | name += strlen(name) + 1) { | |
1353 | ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name)); | |
1354 | ||
1355 | if (!strncmp(name, XATTR_NAME_SD, XATTR_NAME_SD_LEN)) { | |
af34983e | 1356 | err = ksmbd_vfs_remove_xattr(user_ns, dentry, name); |
f4415848 NJ |
1357 | if (err) |
1358 | ksmbd_debug(SMB, "remove xattr failed : %s\n", name); | |
1359 | } | |
1360 | } | |
1361 | out: | |
79f6b11a | 1362 | kvfree(xattr_list); |
f4415848 NJ |
1363 | return err; |
1364 | } | |
1365 | ||
af34983e HL |
1366 | static struct xattr_smb_acl *ksmbd_vfs_make_xattr_posix_acl(struct user_namespace *user_ns, |
1367 | struct inode *inode, | |
070fb21e | 1368 | int acl_type) |
f4415848 NJ |
1369 | { |
1370 | struct xattr_smb_acl *smb_acl = NULL; | |
1371 | struct posix_acl *posix_acls; | |
1372 | struct posix_acl_entry *pa_entry; | |
1373 | struct xattr_acl_entry *xa_entry; | |
1374 | int i; | |
1375 | ||
777cad16 NJ |
1376 | if (!IS_ENABLED(CONFIG_FS_POSIX_ACL)) |
1377 | return NULL; | |
1378 | ||
cac2f8b8 | 1379 | posix_acls = get_inode_acl(inode, acl_type); |
f4415848 NJ |
1380 | if (!posix_acls) |
1381 | return NULL; | |
1382 | ||
1383 | smb_acl = kzalloc(sizeof(struct xattr_smb_acl) + | |
1384 | sizeof(struct xattr_acl_entry) * posix_acls->a_count, | |
1385 | GFP_KERNEL); | |
1386 | if (!smb_acl) | |
1387 | goto out; | |
1388 | ||
1389 | smb_acl->count = posix_acls->a_count; | |
1390 | pa_entry = posix_acls->a_entries; | |
1391 | xa_entry = smb_acl->entries; | |
1392 | for (i = 0; i < posix_acls->a_count; i++, pa_entry++, xa_entry++) { | |
1393 | switch (pa_entry->e_tag) { | |
1394 | case ACL_USER: | |
1395 | xa_entry->type = SMB_ACL_USER; | |
0e844efe | 1396 | xa_entry->uid = posix_acl_uid_translate(user_ns, pa_entry); |
f4415848 NJ |
1397 | break; |
1398 | case ACL_USER_OBJ: | |
1399 | xa_entry->type = SMB_ACL_USER_OBJ; | |
1400 | break; | |
1401 | case ACL_GROUP: | |
1402 | xa_entry->type = SMB_ACL_GROUP; | |
0e844efe | 1403 | xa_entry->gid = posix_acl_gid_translate(user_ns, pa_entry); |
f4415848 NJ |
1404 | break; |
1405 | case ACL_GROUP_OBJ: | |
1406 | xa_entry->type = SMB_ACL_GROUP_OBJ; | |
1407 | break; | |
1408 | case ACL_OTHER: | |
1409 | xa_entry->type = SMB_ACL_OTHER; | |
1410 | break; | |
1411 | case ACL_MASK: | |
1412 | xa_entry->type = SMB_ACL_MASK; | |
1413 | break; | |
1414 | default: | |
bde1694a | 1415 | pr_err("unknown type : 0x%x\n", pa_entry->e_tag); |
f4415848 NJ |
1416 | goto out; |
1417 | } | |
1418 | ||
1419 | if (pa_entry->e_perm & ACL_READ) | |
1420 | xa_entry->perm |= SMB_ACL_READ; | |
1421 | if (pa_entry->e_perm & ACL_WRITE) | |
1422 | xa_entry->perm |= SMB_ACL_WRITE; | |
1423 | if (pa_entry->e_perm & ACL_EXECUTE) | |
1424 | xa_entry->perm |= SMB_ACL_EXECUTE; | |
1425 | } | |
1426 | out: | |
1427 | posix_acl_release(posix_acls); | |
1428 | return smb_acl; | |
1429 | } | |
1430 | ||
af34983e HL |
1431 | int ksmbd_vfs_set_sd_xattr(struct ksmbd_conn *conn, |
1432 | struct user_namespace *user_ns, | |
1433 | struct dentry *dentry, | |
070fb21e | 1434 | struct smb_ntsd *pntsd, int len) |
f4415848 NJ |
1435 | { |
1436 | int rc; | |
1437 | struct ndr sd_ndr = {0}, acl_ndr = {0}; | |
1438 | struct xattr_ntacl acl = {0}; | |
1439 | struct xattr_smb_acl *smb_acl, *def_smb_acl = NULL; | |
fba08fa0 | 1440 | struct inode *inode = d_inode(dentry); |
f4415848 NJ |
1441 | |
1442 | acl.version = 4; | |
1443 | acl.hash_type = XATTR_SD_HASH_TYPE_SHA256; | |
fba08fa0 | 1444 | acl.current_time = ksmbd_UnixTimeToNT(current_time(inode)); |
f4415848 NJ |
1445 | |
1446 | memcpy(acl.desc, "posix_acl", 9); | |
1447 | acl.desc_len = 10; | |
1448 | ||
1449 | pntsd->osidoffset = | |
1450 | cpu_to_le32(le32_to_cpu(pntsd->osidoffset) + NDR_NTSD_OFFSETOF); | |
1451 | pntsd->gsidoffset = | |
1452 | cpu_to_le32(le32_to_cpu(pntsd->gsidoffset) + NDR_NTSD_OFFSETOF); | |
1453 | pntsd->dacloffset = | |
1454 | cpu_to_le32(le32_to_cpu(pntsd->dacloffset) + NDR_NTSD_OFFSETOF); | |
1455 | ||
1456 | acl.sd_buf = (char *)pntsd; | |
1457 | acl.sd_size = len; | |
1458 | ||
1459 | rc = ksmbd_gen_sd_hash(conn, acl.sd_buf, acl.sd_size, acl.hash); | |
1460 | if (rc) { | |
bde1694a | 1461 | pr_err("failed to generate hash for ndr acl\n"); |
f4415848 NJ |
1462 | return rc; |
1463 | } | |
1464 | ||
af34983e HL |
1465 | smb_acl = ksmbd_vfs_make_xattr_posix_acl(user_ns, inode, |
1466 | ACL_TYPE_ACCESS); | |
f4415848 | 1467 | if (S_ISDIR(inode->i_mode)) |
af34983e | 1468 | def_smb_acl = ksmbd_vfs_make_xattr_posix_acl(user_ns, inode, |
070fb21e | 1469 | ACL_TYPE_DEFAULT); |
f4415848 | 1470 | |
af34983e HL |
1471 | rc = ndr_encode_posix_acl(&acl_ndr, user_ns, inode, |
1472 | smb_acl, def_smb_acl); | |
f4415848 | 1473 | if (rc) { |
bde1694a | 1474 | pr_err("failed to encode ndr to posix acl\n"); |
f4415848 NJ |
1475 | goto out; |
1476 | } | |
1477 | ||
1478 | rc = ksmbd_gen_sd_hash(conn, acl_ndr.data, acl_ndr.offset, | |
070fb21e | 1479 | acl.posix_acl_hash); |
f4415848 | 1480 | if (rc) { |
bde1694a | 1481 | pr_err("failed to generate hash for ndr acl\n"); |
f4415848 NJ |
1482 | goto out; |
1483 | } | |
1484 | ||
1485 | rc = ndr_encode_v4_ntacl(&sd_ndr, &acl); | |
1486 | if (rc) { | |
bde1694a | 1487 | pr_err("failed to encode ndr to posix acl\n"); |
f4415848 NJ |
1488 | goto out; |
1489 | } | |
1490 | ||
af34983e HL |
1491 | rc = ksmbd_vfs_setxattr(user_ns, dentry, |
1492 | XATTR_NAME_SD, sd_ndr.data, | |
070fb21e | 1493 | sd_ndr.offset, 0); |
f4415848 | 1494 | if (rc < 0) |
bde1694a | 1495 | pr_err("Failed to store XATTR ntacl :%d\n", rc); |
f4415848 NJ |
1496 | |
1497 | kfree(sd_ndr.data); | |
1498 | out: | |
1499 | kfree(acl_ndr.data); | |
1500 | kfree(smb_acl); | |
1501 | kfree(def_smb_acl); | |
1502 | return rc; | |
1503 | } | |
1504 | ||
af34983e HL |
1505 | int ksmbd_vfs_get_sd_xattr(struct ksmbd_conn *conn, |
1506 | struct user_namespace *user_ns, | |
1507 | struct dentry *dentry, | |
070fb21e | 1508 | struct smb_ntsd **pntsd) |
f4415848 NJ |
1509 | { |
1510 | int rc; | |
1511 | struct ndr n; | |
78ad2c27 NJ |
1512 | struct inode *inode = d_inode(dentry); |
1513 | struct ndr acl_ndr = {0}; | |
1514 | struct xattr_ntacl acl; | |
1515 | struct xattr_smb_acl *smb_acl = NULL, *def_smb_acl = NULL; | |
1516 | __u8 cmp_hash[XATTR_SD_HASH_SIZE] = {0}; | |
f4415848 | 1517 | |
af34983e | 1518 | rc = ksmbd_vfs_getxattr(user_ns, dentry, XATTR_NAME_SD, &n.data); |
78ad2c27 NJ |
1519 | if (rc <= 0) |
1520 | return rc; | |
f4415848 | 1521 | |
78ad2c27 NJ |
1522 | n.length = rc; |
1523 | rc = ndr_decode_v4_ntacl(&n, &acl); | |
1524 | if (rc) | |
1525 | goto free_n_data; | |
f4415848 | 1526 | |
78ad2c27 NJ |
1527 | smb_acl = ksmbd_vfs_make_xattr_posix_acl(user_ns, inode, |
1528 | ACL_TYPE_ACCESS); | |
1529 | if (S_ISDIR(inode->i_mode)) | |
1530 | def_smb_acl = ksmbd_vfs_make_xattr_posix_acl(user_ns, inode, | |
1531 | ACL_TYPE_DEFAULT); | |
f4415848 | 1532 | |
78ad2c27 NJ |
1533 | rc = ndr_encode_posix_acl(&acl_ndr, user_ns, inode, smb_acl, |
1534 | def_smb_acl); | |
1535 | if (rc) { | |
1536 | pr_err("failed to encode ndr to posix acl\n"); | |
1537 | goto out_free; | |
1538 | } | |
f4415848 | 1539 | |
78ad2c27 NJ |
1540 | rc = ksmbd_gen_sd_hash(conn, acl_ndr.data, acl_ndr.offset, cmp_hash); |
1541 | if (rc) { | |
1542 | pr_err("failed to generate hash for ndr acl\n"); | |
1543 | goto out_free; | |
1544 | } | |
1545 | ||
1546 | if (memcmp(cmp_hash, acl.posix_acl_hash, XATTR_SD_HASH_SIZE)) { | |
1547 | pr_err("hash value diff\n"); | |
1548 | rc = -EINVAL; | |
1549 | goto out_free; | |
1550 | } | |
1551 | ||
1552 | *pntsd = acl.sd_buf; | |
8f054118 NJ |
1553 | if (acl.sd_size < sizeof(struct smb_ntsd)) { |
1554 | pr_err("sd size is invalid\n"); | |
1555 | goto out_free; | |
1556 | } | |
1557 | ||
78ad2c27 NJ |
1558 | (*pntsd)->osidoffset = cpu_to_le32(le32_to_cpu((*pntsd)->osidoffset) - |
1559 | NDR_NTSD_OFFSETOF); | |
1560 | (*pntsd)->gsidoffset = cpu_to_le32(le32_to_cpu((*pntsd)->gsidoffset) - | |
1561 | NDR_NTSD_OFFSETOF); | |
1562 | (*pntsd)->dacloffset = cpu_to_le32(le32_to_cpu((*pntsd)->dacloffset) - | |
1563 | NDR_NTSD_OFFSETOF); | |
1564 | ||
1565 | rc = acl.sd_size; | |
1566 | out_free: | |
1567 | kfree(acl_ndr.data); | |
1568 | kfree(smb_acl); | |
1569 | kfree(def_smb_acl); | |
1570 | if (rc < 0) { | |
1571 | kfree(acl.sd_buf); | |
1572 | *pntsd = NULL; | |
f4415848 NJ |
1573 | } |
1574 | ||
78ad2c27 NJ |
1575 | free_n_data: |
1576 | kfree(n.data); | |
f4415848 NJ |
1577 | return rc; |
1578 | } | |
1579 | ||
af34983e HL |
1580 | int ksmbd_vfs_set_dos_attrib_xattr(struct user_namespace *user_ns, |
1581 | struct dentry *dentry, | |
070fb21e | 1582 | struct xattr_dos_attrib *da) |
f4415848 NJ |
1583 | { |
1584 | struct ndr n; | |
1585 | int err; | |
1586 | ||
1587 | err = ndr_encode_dos_attr(&n, da); | |
1588 | if (err) | |
1589 | return err; | |
1590 | ||
af34983e | 1591 | err = ksmbd_vfs_setxattr(user_ns, dentry, XATTR_NAME_DOS_ATTRIBUTE, |
070fb21e | 1592 | (void *)n.data, n.offset, 0); |
f4415848 NJ |
1593 | if (err) |
1594 | ksmbd_debug(SMB, "failed to store dos attribute in xattr\n"); | |
1595 | kfree(n.data); | |
1596 | ||
1597 | return err; | |
1598 | } | |
1599 | ||
af34983e HL |
1600 | int ksmbd_vfs_get_dos_attrib_xattr(struct user_namespace *user_ns, |
1601 | struct dentry *dentry, | |
070fb21e | 1602 | struct xattr_dos_attrib *da) |
f4415848 NJ |
1603 | { |
1604 | struct ndr n; | |
1605 | int err; | |
1606 | ||
af34983e | 1607 | err = ksmbd_vfs_getxattr(user_ns, dentry, XATTR_NAME_DOS_ATTRIBUTE, |
070fb21e | 1608 | (char **)&n.data); |
f4415848 NJ |
1609 | if (err > 0) { |
1610 | n.length = err; | |
1611 | if (ndr_decode_dos_attr(&n, da)) | |
1612 | err = -EINVAL; | |
79f6b11a | 1613 | kfree(n.data); |
64b39f4a | 1614 | } else { |
f4415848 | 1615 | ksmbd_debug(SMB, "failed to load dos attribute in xattr\n"); |
64b39f4a | 1616 | } |
f4415848 NJ |
1617 | |
1618 | return err; | |
1619 | } | |
1620 | ||
f4415848 NJ |
1621 | /** |
1622 | * ksmbd_vfs_init_kstat() - convert unix stat information to smb stat format | |
1623 | * @p: destination buffer | |
1624 | * @ksmbd_kstat: ksmbd kstat wrapper | |
1625 | */ | |
1626 | void *ksmbd_vfs_init_kstat(char **p, struct ksmbd_kstat *ksmbd_kstat) | |
1627 | { | |
1628 | struct file_directory_info *info = (struct file_directory_info *)(*p); | |
1629 | struct kstat *kstat = ksmbd_kstat->kstat; | |
1630 | u64 time; | |
1631 | ||
1632 | info->FileIndex = 0; | |
1633 | info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time); | |
1634 | time = ksmbd_UnixTimeToNT(kstat->atime); | |
1635 | info->LastAccessTime = cpu_to_le64(time); | |
1636 | time = ksmbd_UnixTimeToNT(kstat->mtime); | |
1637 | info->LastWriteTime = cpu_to_le64(time); | |
1638 | time = ksmbd_UnixTimeToNT(kstat->ctime); | |
1639 | info->ChangeTime = cpu_to_le64(time); | |
1640 | ||
26a2787d | 1641 | if (ksmbd_kstat->file_attributes & FILE_ATTRIBUTE_DIRECTORY_LE) { |
f4415848 NJ |
1642 | info->EndOfFile = 0; |
1643 | info->AllocationSize = 0; | |
1644 | } else { | |
1645 | info->EndOfFile = cpu_to_le64(kstat->size); | |
1646 | info->AllocationSize = cpu_to_le64(kstat->blocks << 9); | |
1647 | } | |
1648 | info->ExtFileAttributes = ksmbd_kstat->file_attributes; | |
1649 | ||
1650 | return info; | |
1651 | } | |
1652 | ||
af34983e HL |
1653 | int ksmbd_vfs_fill_dentry_attrs(struct ksmbd_work *work, |
1654 | struct user_namespace *user_ns, | |
1655 | struct dentry *dentry, | |
070fb21e | 1656 | struct ksmbd_kstat *ksmbd_kstat) |
f4415848 NJ |
1657 | { |
1658 | u64 time; | |
1659 | int rc; | |
1660 | ||
af34983e | 1661 | generic_fillattr(user_ns, d_inode(dentry), ksmbd_kstat->kstat); |
f4415848 NJ |
1662 | |
1663 | time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime); | |
1664 | ksmbd_kstat->create_time = time; | |
1665 | ||
1666 | /* | |
1667 | * set default value for the case that store dos attributes is not yes | |
1668 | * or that acl is disable in server's filesystem and the config is yes. | |
1669 | */ | |
1670 | if (S_ISDIR(ksmbd_kstat->kstat->mode)) | |
26a2787d | 1671 | ksmbd_kstat->file_attributes = FILE_ATTRIBUTE_DIRECTORY_LE; |
f4415848 | 1672 | else |
26a2787d | 1673 | ksmbd_kstat->file_attributes = FILE_ATTRIBUTE_ARCHIVE_LE; |
f4415848 NJ |
1674 | |
1675 | if (test_share_config_flag(work->tcon->share_conf, | |
64b39f4a | 1676 | KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) { |
f4415848 NJ |
1677 | struct xattr_dos_attrib da; |
1678 | ||
af34983e | 1679 | rc = ksmbd_vfs_get_dos_attrib_xattr(user_ns, dentry, &da); |
f4415848 NJ |
1680 | if (rc > 0) { |
1681 | ksmbd_kstat->file_attributes = cpu_to_le32(da.attr); | |
1682 | ksmbd_kstat->create_time = da.create_time; | |
64b39f4a | 1683 | } else { |
f4415848 | 1684 | ksmbd_debug(VFS, "fail to load dos attribute.\n"); |
64b39f4a | 1685 | } |
f4415848 NJ |
1686 | } |
1687 | ||
1688 | return 0; | |
1689 | } | |
1690 | ||
af34983e HL |
1691 | ssize_t ksmbd_vfs_casexattr_len(struct user_namespace *user_ns, |
1692 | struct dentry *dentry, char *attr_name, | |
070fb21e | 1693 | int attr_name_len) |
f4415848 NJ |
1694 | { |
1695 | char *name, *xattr_list = NULL; | |
1696 | ssize_t value_len = -ENOENT, xattr_list_len; | |
1697 | ||
1698 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
1699 | if (xattr_list_len <= 0) | |
1700 | goto out; | |
1701 | ||
1702 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
1703 | name += strlen(name) + 1) { | |
1704 | ksmbd_debug(VFS, "%s, len %zd\n", name, strlen(name)); | |
1705 | if (strncasecmp(attr_name, name, attr_name_len)) | |
1706 | continue; | |
1707 | ||
af34983e | 1708 | value_len = ksmbd_vfs_xattr_len(user_ns, dentry, name); |
f4415848 NJ |
1709 | break; |
1710 | } | |
1711 | ||
1712 | out: | |
79f6b11a | 1713 | kvfree(xattr_list); |
f4415848 NJ |
1714 | return value_len; |
1715 | } | |
1716 | ||
64b39f4a | 1717 | int ksmbd_vfs_xattr_stream_name(char *stream_name, char **xattr_stream_name, |
070fb21e | 1718 | size_t *xattr_stream_name_size, int s_type) |
f4415848 | 1719 | { |
07781de9 | 1720 | char *type, *buf; |
f4415848 NJ |
1721 | |
1722 | if (s_type == DIR_STREAM) | |
1723 | type = ":$INDEX_ALLOCATION"; | |
1724 | else | |
1725 | type = ":$DATA"; | |
1726 | ||
07781de9 DC |
1727 | buf = kasprintf(GFP_KERNEL, "%s%s%s", |
1728 | XATTR_NAME_STREAM, stream_name, type); | |
1729 | if (!buf) | |
f4415848 NJ |
1730 | return -ENOMEM; |
1731 | ||
07781de9 DC |
1732 | *xattr_stream_name = buf; |
1733 | *xattr_stream_name_size = strlen(buf) + 1; | |
f4415848 NJ |
1734 | |
1735 | return 0; | |
1736 | } | |
1737 | ||
f4415848 | 1738 | int ksmbd_vfs_copy_file_ranges(struct ksmbd_work *work, |
070fb21e NJ |
1739 | struct ksmbd_file *src_fp, |
1740 | struct ksmbd_file *dst_fp, | |
1741 | struct srv_copychunk *chunks, | |
1742 | unsigned int chunk_count, | |
1743 | unsigned int *chunk_count_written, | |
1744 | unsigned int *chunk_size_written, | |
1745 | loff_t *total_size_written) | |
f4415848 NJ |
1746 | { |
1747 | unsigned int i; | |
1748 | loff_t src_off, dst_off, src_file_size; | |
1749 | size_t len; | |
1750 | int ret; | |
1751 | ||
1752 | *chunk_count_written = 0; | |
1753 | *chunk_size_written = 0; | |
1754 | *total_size_written = 0; | |
1755 | ||
1756 | if (!(src_fp->daccess & (FILE_READ_DATA_LE | FILE_EXECUTE_LE))) { | |
369c1634 | 1757 | pr_err("no right to read(%pD)\n", src_fp->filp); |
f4415848 NJ |
1758 | return -EACCES; |
1759 | } | |
1760 | if (!(dst_fp->daccess & (FILE_WRITE_DATA_LE | FILE_APPEND_DATA_LE))) { | |
369c1634 | 1761 | pr_err("no right to write(%pD)\n", dst_fp->filp); |
f4415848 NJ |
1762 | return -EACCES; |
1763 | } | |
1764 | ||
1765 | if (ksmbd_stream_fd(src_fp) || ksmbd_stream_fd(dst_fp)) | |
1766 | return -EBADF; | |
1767 | ||
1768 | smb_break_all_levII_oplock(work, dst_fp, 1); | |
1769 | ||
c36fca86 NJ |
1770 | if (!work->tcon->posix_extensions) { |
1771 | for (i = 0; i < chunk_count; i++) { | |
1772 | src_off = le64_to_cpu(chunks[i].SourceOffset); | |
1773 | dst_off = le64_to_cpu(chunks[i].TargetOffset); | |
1774 | len = le32_to_cpu(chunks[i].Length); | |
1775 | ||
1776 | if (check_lock_range(src_fp->filp, src_off, | |
64b39f4a | 1777 | src_off + len - 1, READ)) |
c36fca86 NJ |
1778 | return -EAGAIN; |
1779 | if (check_lock_range(dst_fp->filp, dst_off, | |
64b39f4a | 1780 | dst_off + len - 1, WRITE)) |
c36fca86 NJ |
1781 | return -EAGAIN; |
1782 | } | |
f4415848 NJ |
1783 | } |
1784 | ||
1785 | src_file_size = i_size_read(file_inode(src_fp->filp)); | |
1786 | ||
1787 | for (i = 0; i < chunk_count; i++) { | |
1788 | src_off = le64_to_cpu(chunks[i].SourceOffset); | |
1789 | dst_off = le64_to_cpu(chunks[i].TargetOffset); | |
1790 | len = le32_to_cpu(chunks[i].Length); | |
1791 | ||
1792 | if (src_off + len > src_file_size) | |
1793 | return -E2BIG; | |
1794 | ||
f8524776 NJ |
1795 | ret = vfs_copy_file_range(src_fp->filp, src_off, |
1796 | dst_fp->filp, dst_off, len, 0); | |
868f9f2f | 1797 | if (ret == -EOPNOTSUPP || ret == -EXDEV) |
10bc8e4a AG |
1798 | ret = vfs_copy_file_range(src_fp->filp, src_off, |
1799 | dst_fp->filp, dst_off, len, | |
1800 | COPY_FILE_SPLICE); | |
f4415848 NJ |
1801 | if (ret < 0) |
1802 | return ret; | |
1803 | ||
1804 | *chunk_count_written += 1; | |
1805 | *total_size_written += ret; | |
1806 | } | |
1807 | return 0; | |
1808 | } | |
1809 | ||
45a64e8b | 1810 | void ksmbd_vfs_posix_lock_wait(struct file_lock *flock) |
f4415848 | 1811 | { |
45a64e8b | 1812 | wait_event(flock->fl_wait, !flock->fl_blocker); |
f4415848 NJ |
1813 | } |
1814 | ||
1815 | int ksmbd_vfs_posix_lock_wait_timeout(struct file_lock *flock, long timeout) | |
1816 | { | |
1817 | return wait_event_interruptible_timeout(flock->fl_wait, | |
1818 | !flock->fl_blocker, | |
1819 | timeout); | |
1820 | } | |
1821 | ||
1822 | void ksmbd_vfs_posix_lock_unblock(struct file_lock *flock) | |
1823 | { | |
1824 | locks_delete_block(flock); | |
1825 | } | |
1826 | ||
af34983e | 1827 | int ksmbd_vfs_set_init_posix_acl(struct user_namespace *user_ns, |
138060ba | 1828 | struct dentry *dentry) |
f4415848 NJ |
1829 | { |
1830 | struct posix_acl_state acl_state; | |
1831 | struct posix_acl *acls; | |
138060ba | 1832 | struct inode *inode = d_inode(dentry); |
f4415848 NJ |
1833 | int rc; |
1834 | ||
777cad16 NJ |
1835 | if (!IS_ENABLED(CONFIG_FS_POSIX_ACL)) |
1836 | return -EOPNOTSUPP; | |
1837 | ||
f4415848 NJ |
1838 | ksmbd_debug(SMB, "Set posix acls\n"); |
1839 | rc = init_acl_state(&acl_state, 1); | |
1840 | if (rc) | |
1841 | return rc; | |
1842 | ||
1843 | /* Set default owner group */ | |
1844 | acl_state.owner.allow = (inode->i_mode & 0700) >> 6; | |
1845 | acl_state.group.allow = (inode->i_mode & 0070) >> 3; | |
1846 | acl_state.other.allow = inode->i_mode & 0007; | |
1847 | acl_state.users->aces[acl_state.users->n].uid = inode->i_uid; | |
1848 | acl_state.users->aces[acl_state.users->n++].perms.allow = | |
1849 | acl_state.owner.allow; | |
1850 | acl_state.groups->aces[acl_state.groups->n].gid = inode->i_gid; | |
1851 | acl_state.groups->aces[acl_state.groups->n++].perms.allow = | |
1852 | acl_state.group.allow; | |
1853 | acl_state.mask.allow = 0x07; | |
1854 | ||
67d1c432 | 1855 | acls = posix_acl_alloc(6, GFP_KERNEL); |
f4415848 NJ |
1856 | if (!acls) { |
1857 | free_acl_state(&acl_state); | |
1858 | return -ENOMEM; | |
1859 | } | |
1860 | posix_state_to_acl(&acl_state, acls->a_entries); | |
138060ba | 1861 | rc = set_posix_acl(user_ns, dentry, ACL_TYPE_ACCESS, acls); |
f4415848 NJ |
1862 | if (rc < 0) |
1863 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_ACCESS) failed, rc : %d\n", | |
070fb21e | 1864 | rc); |
f4415848 NJ |
1865 | else if (S_ISDIR(inode->i_mode)) { |
1866 | posix_state_to_acl(&acl_state, acls->a_entries); | |
138060ba | 1867 | rc = set_posix_acl(user_ns, dentry, ACL_TYPE_DEFAULT, acls); |
f4415848 NJ |
1868 | if (rc < 0) |
1869 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_DEFAULT) failed, rc : %d\n", | |
070fb21e | 1870 | rc); |
f4415848 NJ |
1871 | } |
1872 | free_acl_state(&acl_state); | |
1873 | posix_acl_release(acls); | |
1874 | return rc; | |
1875 | } | |
1876 | ||
af34983e | 1877 | int ksmbd_vfs_inherit_posix_acl(struct user_namespace *user_ns, |
138060ba | 1878 | struct dentry *dentry, struct inode *parent_inode) |
f4415848 NJ |
1879 | { |
1880 | struct posix_acl *acls; | |
1881 | struct posix_acl_entry *pace; | |
138060ba | 1882 | struct inode *inode = d_inode(dentry); |
f4415848 NJ |
1883 | int rc, i; |
1884 | ||
777cad16 NJ |
1885 | if (!IS_ENABLED(CONFIG_FS_POSIX_ACL)) |
1886 | return -EOPNOTSUPP; | |
1887 | ||
cac2f8b8 | 1888 | acls = get_inode_acl(parent_inode, ACL_TYPE_DEFAULT); |
f4415848 NJ |
1889 | if (!acls) |
1890 | return -ENOENT; | |
1891 | pace = acls->a_entries; | |
1892 | ||
1893 | for (i = 0; i < acls->a_count; i++, pace++) { | |
1894 | if (pace->e_tag == ACL_MASK) { | |
1895 | pace->e_perm = 0x07; | |
1896 | break; | |
1897 | } | |
1898 | } | |
1899 | ||
138060ba | 1900 | rc = set_posix_acl(user_ns, dentry, ACL_TYPE_ACCESS, acls); |
f4415848 NJ |
1901 | if (rc < 0) |
1902 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_ACCESS) failed, rc : %d\n", | |
070fb21e | 1903 | rc); |
f4415848 | 1904 | if (S_ISDIR(inode->i_mode)) { |
138060ba | 1905 | rc = set_posix_acl(user_ns, dentry, ACL_TYPE_DEFAULT, |
67d1c432 | 1906 | acls); |
f4415848 NJ |
1907 | if (rc < 0) |
1908 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_DEFAULT) failed, rc : %d\n", | |
070fb21e | 1909 | rc); |
f4415848 NJ |
1910 | } |
1911 | posix_acl_release(acls); | |
1912 | return rc; | |
1913 | } |