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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 NJ |
483 | { |
484 | struct ksmbd_session *sess = work->sess; | |
485 | struct file *filp; | |
486 | loff_t offset = *pos; | |
487 | int err = 0; | |
488 | ||
489 | if (sess->conn->connection_type) { | |
490 | if (!(fp->daccess & FILE_WRITE_DATA_LE)) { | |
493fa2fb NJ |
491 | pr_err("no right to write(%pd)\n", |
492 | fp->filp->f_path.dentry); | |
f4415848 NJ |
493 | err = -EACCES; |
494 | goto out; | |
495 | } | |
496 | } | |
497 | ||
498 | filp = fp->filp; | |
499 | ||
500 | if (ksmbd_stream_fd(fp)) { | |
501 | err = ksmbd_vfs_stream_write(fp, buf, pos, count); | |
502 | if (!err) | |
503 | *written = count; | |
504 | goto out; | |
505 | } | |
506 | ||
c36fca86 NJ |
507 | if (!work->tcon->posix_extensions) { |
508 | err = check_lock_range(filp, *pos, *pos + count - 1, WRITE); | |
509 | if (err) { | |
bde1694a | 510 | pr_err("unable to write due to lock\n"); |
c36fca86 NJ |
511 | err = -EAGAIN; |
512 | goto out; | |
513 | } | |
f4415848 NJ |
514 | } |
515 | ||
516 | /* Do we need to break any of a levelII oplock? */ | |
517 | smb_break_all_levII_oplock(work, fp, 1); | |
518 | ||
519 | err = kernel_write(filp, buf, count, pos); | |
520 | if (err < 0) { | |
521 | ksmbd_debug(VFS, "smb write failed, err = %d\n", err); | |
522 | goto out; | |
523 | } | |
524 | ||
525 | filp->f_pos = *pos; | |
526 | *written = err; | |
527 | err = 0; | |
528 | if (sync) { | |
529 | err = vfs_fsync_range(filp, offset, offset + *written, 0); | |
530 | if (err < 0) | |
493fa2fb NJ |
531 | pr_err("fsync failed for filename = %pd, err = %d\n", |
532 | fp->filp->f_path.dentry, err); | |
f4415848 NJ |
533 | } |
534 | ||
535 | out: | |
536 | return err; | |
537 | } | |
538 | ||
539 | /** | |
540 | * ksmbd_vfs_getattr() - vfs helper for smb getattr | |
541 | * @work: work | |
542 | * @fid: file id of open file | |
543 | * @attrs: inode attributes | |
544 | * | |
545 | * Return: 0 on success, otherwise error | |
546 | */ | |
547 | int ksmbd_vfs_getattr(struct path *path, struct kstat *stat) | |
548 | { | |
549 | int err; | |
550 | ||
551 | err = vfs_getattr(path, stat, STATX_BTIME, AT_STATX_SYNC_AS_STAT); | |
552 | if (err) | |
bde1694a | 553 | pr_err("getattr failed, err %d\n", err); |
f4415848 NJ |
554 | return err; |
555 | } | |
556 | ||
557 | /** | |
558 | * ksmbd_vfs_fsync() - vfs helper for smb fsync | |
559 | * @work: work | |
560 | * @fid: file id of open file | |
561 | * | |
562 | * Return: 0 on success, otherwise error | |
563 | */ | |
64b39f4a | 564 | int ksmbd_vfs_fsync(struct ksmbd_work *work, u64 fid, u64 p_id) |
f4415848 NJ |
565 | { |
566 | struct ksmbd_file *fp; | |
567 | int err; | |
568 | ||
569 | fp = ksmbd_lookup_fd_slow(work, fid, p_id); | |
570 | if (!fp) { | |
bde1694a | 571 | pr_err("failed to get filp for fid %llu\n", fid); |
f4415848 NJ |
572 | return -ENOENT; |
573 | } | |
574 | err = vfs_fsync(fp->filp, 0); | |
575 | if (err < 0) | |
bde1694a | 576 | pr_err("smb fsync failed, err = %d\n", err); |
f4415848 NJ |
577 | ksmbd_fd_put(work, fp); |
578 | return err; | |
579 | } | |
580 | ||
581 | /** | |
582 | * ksmbd_vfs_remove_file() - vfs helper for smb rmdir or unlink | |
265fd199 | 583 | * @name: directory or file name that is relative to share |
f4415848 NJ |
584 | * |
585 | * Return: 0 on success, otherwise error | |
586 | */ | |
587 | int ksmbd_vfs_remove_file(struct ksmbd_work *work, char *name) | |
588 | { | |
da1e7ada | 589 | struct user_namespace *user_ns; |
7c3d3e99 | 590 | struct path path; |
333111a6 | 591 | struct dentry *parent; |
3161ad3a | 592 | int err; |
f4415848 | 593 | |
f4415848 NJ |
594 | if (ksmbd_override_fsids(work)) |
595 | return -ENOMEM; | |
596 | ||
265fd199 | 597 | err = ksmbd_vfs_kern_path(work, name, LOOKUP_NO_SYMLINKS, &path, false); |
f4415848 NJ |
598 | if (err) { |
599 | ksmbd_debug(VFS, "can't get %s, err %d\n", name, err); | |
600 | ksmbd_revert_fsids(work); | |
f4415848 NJ |
601 | return err; |
602 | } | |
603 | ||
da1e7ada | 604 | user_ns = mnt_user_ns(path.mnt); |
7c3d3e99 | 605 | parent = dget_parent(path.dentry); |
da1e7ada | 606 | err = ksmbd_vfs_lock_parent(user_ns, parent, path.dentry); |
333111a6 HL |
607 | if (err) { |
608 | dput(parent); | |
609 | path_put(&path); | |
610 | ksmbd_revert_fsids(work); | |
611 | return err; | |
f4415848 NJ |
612 | } |
613 | ||
333111a6 | 614 | if (!d_inode(path.dentry)->i_nlink) { |
f4415848 NJ |
615 | err = -ENOENT; |
616 | goto out_err; | |
617 | } | |
618 | ||
333111a6 | 619 | if (S_ISDIR(d_inode(path.dentry)->i_mode)) { |
da1e7ada | 620 | err = vfs_rmdir(user_ns, d_inode(parent), path.dentry); |
f4415848 NJ |
621 | if (err && err != -ENOTEMPTY) |
622 | ksmbd_debug(VFS, "%s: rmdir failed, err %d\n", name, | |
070fb21e | 623 | err); |
f4415848 | 624 | } else { |
da1e7ada | 625 | err = vfs_unlink(user_ns, d_inode(parent), path.dentry, NULL); |
f4415848 NJ |
626 | if (err) |
627 | ksmbd_debug(VFS, "%s: unlink failed, err %d\n", name, | |
070fb21e | 628 | err); |
f4415848 NJ |
629 | } |
630 | ||
f4415848 | 631 | out_err: |
7c3d3e99 NJ |
632 | inode_unlock(d_inode(parent)); |
633 | dput(parent); | |
634 | path_put(&path); | |
f4415848 NJ |
635 | ksmbd_revert_fsids(work); |
636 | return err; | |
637 | } | |
638 | ||
639 | /** | |
640 | * ksmbd_vfs_link() - vfs helper for creating smb hardlink | |
641 | * @oldname: source file name | |
265fd199 | 642 | * @newname: hardlink name that is relative to share |
f4415848 NJ |
643 | * |
644 | * Return: 0 on success, otherwise error | |
645 | */ | |
64b39f4a | 646 | int ksmbd_vfs_link(struct ksmbd_work *work, const char *oldname, |
070fb21e | 647 | const char *newname) |
f4415848 NJ |
648 | { |
649 | struct path oldpath, newpath; | |
650 | struct dentry *dentry; | |
651 | int err; | |
652 | ||
653 | if (ksmbd_override_fsids(work)) | |
654 | return -ENOMEM; | |
655 | ||
4ea47798 | 656 | err = kern_path(oldname, LOOKUP_NO_SYMLINKS, &oldpath); |
f4415848 | 657 | if (err) { |
bde1694a NJ |
658 | pr_err("cannot get linux path for %s, err = %d\n", |
659 | oldname, err); | |
f4415848 NJ |
660 | goto out1; |
661 | } | |
662 | ||
265fd199 HL |
663 | dentry = ksmbd_vfs_kern_path_create(work, newname, |
664 | LOOKUP_NO_SYMLINKS | LOOKUP_REVAL, | |
665 | &newpath); | |
f4415848 NJ |
666 | if (IS_ERR(dentry)) { |
667 | err = PTR_ERR(dentry); | |
bde1694a | 668 | pr_err("path create err for %s, err %d\n", newname, err); |
f4415848 NJ |
669 | goto out2; |
670 | } | |
671 | ||
672 | err = -EXDEV; | |
673 | if (oldpath.mnt != newpath.mnt) { | |
bde1694a | 674 | pr_err("vfs_link failed err %d\n", err); |
f4415848 NJ |
675 | goto out3; |
676 | } | |
677 | ||
af34983e HL |
678 | err = vfs_link(oldpath.dentry, mnt_user_ns(newpath.mnt), |
679 | d_inode(newpath.dentry), | |
070fb21e | 680 | dentry, NULL); |
f4415848 NJ |
681 | if (err) |
682 | ksmbd_debug(VFS, "vfs_link failed err %d\n", err); | |
683 | ||
684 | out3: | |
685 | done_path_create(&newpath, dentry); | |
686 | out2: | |
687 | path_put(&oldpath); | |
688 | out1: | |
689 | ksmbd_revert_fsids(work); | |
690 | return err; | |
691 | } | |
692 | ||
4b637fc1 NJ |
693 | static int ksmbd_validate_entry_in_use(struct dentry *src_dent) |
694 | { | |
695 | struct dentry *dst_dent; | |
696 | ||
697 | spin_lock(&src_dent->d_lock); | |
698 | list_for_each_entry(dst_dent, &src_dent->d_subdirs, d_child) { | |
699 | struct ksmbd_file *child_fp; | |
700 | ||
701 | if (d_really_is_negative(dst_dent)) | |
702 | continue; | |
703 | ||
704 | child_fp = ksmbd_lookup_fd_inode(d_inode(dst_dent)); | |
705 | if (child_fp) { | |
706 | spin_unlock(&src_dent->d_lock); | |
707 | ksmbd_debug(VFS, "Forbid rename, sub file/dir is in use\n"); | |
708 | return -EACCES; | |
709 | } | |
710 | } | |
711 | spin_unlock(&src_dent->d_lock); | |
712 | ||
713 | return 0; | |
714 | } | |
715 | ||
f4415848 | 716 | static int __ksmbd_vfs_rename(struct ksmbd_work *work, |
af34983e | 717 | struct user_namespace *src_user_ns, |
070fb21e NJ |
718 | struct dentry *src_dent_parent, |
719 | struct dentry *src_dent, | |
af34983e | 720 | struct user_namespace *dst_user_ns, |
070fb21e NJ |
721 | struct dentry *dst_dent_parent, |
722 | struct dentry *trap_dent, | |
723 | char *dst_name) | |
f4415848 NJ |
724 | { |
725 | struct dentry *dst_dent; | |
726 | int err; | |
727 | ||
c36fca86 | 728 | if (!work->tcon->posix_extensions) { |
4b637fc1 NJ |
729 | err = ksmbd_validate_entry_in_use(src_dent); |
730 | if (err) | |
731 | return err; | |
f4415848 | 732 | } |
f4415848 NJ |
733 | |
734 | if (d_really_is_negative(src_dent_parent)) | |
735 | return -ENOENT; | |
736 | if (d_really_is_negative(dst_dent_parent)) | |
737 | return -ENOENT; | |
738 | if (d_really_is_negative(src_dent)) | |
739 | return -ENOENT; | |
740 | if (src_dent == trap_dent) | |
741 | return -EINVAL; | |
742 | ||
743 | if (ksmbd_override_fsids(work)) | |
744 | return -ENOMEM; | |
745 | ||
da1e7ada CB |
746 | dst_dent = lookup_one(dst_user_ns, dst_name, dst_dent_parent, |
747 | strlen(dst_name)); | |
f4415848 NJ |
748 | err = PTR_ERR(dst_dent); |
749 | if (IS_ERR(dst_dent)) { | |
bde1694a | 750 | pr_err("lookup failed %s [%d]\n", dst_name, err); |
f4415848 NJ |
751 | goto out; |
752 | } | |
753 | ||
754 | err = -ENOTEMPTY; | |
755 | if (dst_dent != trap_dent && !d_really_is_positive(dst_dent)) { | |
756 | struct renamedata rd = { | |
af34983e | 757 | .old_mnt_userns = src_user_ns, |
f4415848 NJ |
758 | .old_dir = d_inode(src_dent_parent), |
759 | .old_dentry = src_dent, | |
af34983e | 760 | .new_mnt_userns = dst_user_ns, |
f4415848 NJ |
761 | .new_dir = d_inode(dst_dent_parent), |
762 | .new_dentry = dst_dent, | |
763 | }; | |
764 | err = vfs_rename(&rd); | |
765 | } | |
766 | if (err) | |
bde1694a | 767 | pr_err("vfs_rename failed err %d\n", err); |
f4415848 NJ |
768 | if (dst_dent) |
769 | dput(dst_dent); | |
770 | out: | |
771 | ksmbd_revert_fsids(work); | |
772 | return err; | |
773 | } | |
774 | ||
775 | int ksmbd_vfs_fp_rename(struct ksmbd_work *work, struct ksmbd_file *fp, | |
070fb21e | 776 | char *newname) |
f4415848 | 777 | { |
da1e7ada | 778 | struct user_namespace *user_ns; |
f4415848 NJ |
779 | struct path dst_path; |
780 | struct dentry *src_dent_parent, *dst_dent_parent; | |
ff1d5727 | 781 | struct dentry *src_dent, *trap_dent, *src_child; |
f4415848 NJ |
782 | char *dst_name; |
783 | int err; | |
784 | ||
785 | dst_name = extract_last_component(newname); | |
265fd199 HL |
786 | if (!dst_name) { |
787 | dst_name = newname; | |
788 | newname = ""; | |
789 | } | |
f4415848 NJ |
790 | |
791 | src_dent_parent = dget_parent(fp->filp->f_path.dentry); | |
f4415848 | 792 | src_dent = fp->filp->f_path.dentry; |
f4415848 | 793 | |
265fd199 HL |
794 | err = ksmbd_vfs_kern_path(work, newname, |
795 | LOOKUP_NO_SYMLINKS | LOOKUP_DIRECTORY, | |
796 | &dst_path, false); | |
f4415848 NJ |
797 | if (err) { |
798 | ksmbd_debug(VFS, "Cannot get path for %s [%d]\n", newname, err); | |
799 | goto out; | |
800 | } | |
801 | dst_dent_parent = dst_path.dentry; | |
f4415848 NJ |
802 | |
803 | trap_dent = lock_rename(src_dent_parent, dst_dent_parent); | |
ff1d5727 NJ |
804 | dget(src_dent); |
805 | dget(dst_dent_parent); | |
da1e7ada CB |
806 | user_ns = file_mnt_user_ns(fp->filp); |
807 | src_child = lookup_one(user_ns, src_dent->d_name.name, src_dent_parent, | |
808 | src_dent->d_name.len); | |
ff1d5727 NJ |
809 | if (IS_ERR(src_child)) { |
810 | err = PTR_ERR(src_child); | |
811 | goto out_lock; | |
812 | } | |
813 | ||
814 | if (src_child != src_dent) { | |
815 | err = -ESTALE; | |
816 | dput(src_child); | |
817 | goto out_lock; | |
818 | } | |
819 | dput(src_child); | |
820 | ||
f4415848 | 821 | err = __ksmbd_vfs_rename(work, |
da1e7ada | 822 | user_ns, |
f4415848 NJ |
823 | src_dent_parent, |
824 | src_dent, | |
af34983e | 825 | mnt_user_ns(dst_path.mnt), |
f4415848 NJ |
826 | dst_dent_parent, |
827 | trap_dent, | |
828 | dst_name); | |
ff1d5727 NJ |
829 | out_lock: |
830 | dput(src_dent); | |
f4415848 | 831 | dput(dst_dent_parent); |
ff1d5727 | 832 | unlock_rename(src_dent_parent, dst_dent_parent); |
f4415848 NJ |
833 | path_put(&dst_path); |
834 | out: | |
f4415848 NJ |
835 | dput(src_dent_parent); |
836 | return err; | |
837 | } | |
838 | ||
839 | /** | |
840 | * ksmbd_vfs_truncate() - vfs helper for smb file truncate | |
841 | * @work: work | |
f4415848 NJ |
842 | * @fid: file id of old file |
843 | * @size: truncate to given size | |
844 | * | |
845 | * Return: 0 on success, otherwise error | |
846 | */ | |
265fd199 | 847 | int ksmbd_vfs_truncate(struct ksmbd_work *work, |
070fb21e | 848 | struct ksmbd_file *fp, loff_t size) |
f4415848 | 849 | { |
f4415848 | 850 | int err = 0; |
265fd199 | 851 | struct file *filp; |
f4415848 | 852 | |
265fd199 | 853 | filp = fp->filp; |
f4415848 | 854 | |
265fd199 HL |
855 | /* Do we need to break any of a levelII oplock? */ |
856 | smb_break_all_levII_oplock(work, fp, 1); | |
c36fca86 | 857 | |
265fd199 HL |
858 | if (!work->tcon->posix_extensions) { |
859 | struct inode *inode = file_inode(filp); | |
860 | ||
861 | if (size < inode->i_size) { | |
862 | err = check_lock_range(filp, size, | |
863 | inode->i_size - 1, WRITE); | |
864 | } else { | |
865 | err = check_lock_range(filp, inode->i_size, | |
866 | size - 1, WRITE); | |
f4415848 NJ |
867 | } |
868 | ||
265fd199 HL |
869 | if (err) { |
870 | pr_err("failed due to lock\n"); | |
871 | return -EAGAIN; | |
872 | } | |
f4415848 NJ |
873 | } |
874 | ||
265fd199 HL |
875 | err = vfs_truncate(&filp->f_path, size); |
876 | if (err) | |
50f500b7 | 877 | pr_err("truncate failed, err %d\n", err); |
f4415848 NJ |
878 | return err; |
879 | } | |
880 | ||
881 | /** | |
882 | * ksmbd_vfs_listxattr() - vfs helper for smb list extended attributes | |
883 | * @dentry: dentry of file for listing xattrs | |
884 | * @list: destination buffer | |
885 | * @size: destination buffer length | |
886 | * | |
887 | * Return: xattr list length on success, otherwise error | |
888 | */ | |
889 | ssize_t ksmbd_vfs_listxattr(struct dentry *dentry, char **list) | |
890 | { | |
891 | ssize_t size; | |
892 | char *vlist = NULL; | |
893 | ||
894 | size = vfs_listxattr(dentry, NULL, 0); | |
895 | if (size <= 0) | |
896 | return size; | |
897 | ||
79f6b11a | 898 | vlist = kvmalloc(size, GFP_KERNEL | __GFP_ZERO); |
f4415848 NJ |
899 | if (!vlist) |
900 | return -ENOMEM; | |
901 | ||
902 | *list = vlist; | |
903 | size = vfs_listxattr(dentry, vlist, size); | |
904 | if (size < 0) { | |
905 | ksmbd_debug(VFS, "listxattr failed\n"); | |
79f6b11a | 906 | kvfree(vlist); |
f4415848 NJ |
907 | *list = NULL; |
908 | } | |
909 | ||
910 | return size; | |
911 | } | |
912 | ||
af34983e HL |
913 | static ssize_t ksmbd_vfs_xattr_len(struct user_namespace *user_ns, |
914 | struct dentry *dentry, char *xattr_name) | |
f4415848 | 915 | { |
af34983e | 916 | return vfs_getxattr(user_ns, dentry, xattr_name, NULL, 0); |
f4415848 NJ |
917 | } |
918 | ||
919 | /** | |
920 | * ksmbd_vfs_getxattr() - vfs helper for smb get extended attributes value | |
af34983e | 921 | * @user_ns: user namespace |
f4415848 NJ |
922 | * @dentry: dentry of file for getting xattrs |
923 | * @xattr_name: name of xattr name to query | |
924 | * @xattr_buf: destination buffer xattr value | |
925 | * | |
926 | * Return: read xattr value length on success, otherwise error | |
927 | */ | |
af34983e HL |
928 | ssize_t ksmbd_vfs_getxattr(struct user_namespace *user_ns, |
929 | struct dentry *dentry, | |
930 | char *xattr_name, char **xattr_buf) | |
f4415848 NJ |
931 | { |
932 | ssize_t xattr_len; | |
933 | char *buf; | |
934 | ||
935 | *xattr_buf = NULL; | |
af34983e | 936 | xattr_len = ksmbd_vfs_xattr_len(user_ns, dentry, xattr_name); |
f4415848 NJ |
937 | if (xattr_len < 0) |
938 | return xattr_len; | |
939 | ||
940 | buf = kmalloc(xattr_len + 1, GFP_KERNEL); | |
941 | if (!buf) | |
942 | return -ENOMEM; | |
943 | ||
af34983e | 944 | xattr_len = vfs_getxattr(user_ns, dentry, xattr_name, |
d7e5852b | 945 | (void *)buf, xattr_len); |
f4415848 NJ |
946 | if (xattr_len > 0) |
947 | *xattr_buf = buf; | |
948 | else | |
949 | kfree(buf); | |
950 | return xattr_len; | |
951 | } | |
952 | ||
953 | /** | |
954 | * ksmbd_vfs_setxattr() - vfs helper for smb set extended attributes value | |
af34983e | 955 | * @user_ns: user namespace |
f4415848 NJ |
956 | * @dentry: dentry to set XATTR at |
957 | * @name: xattr name for setxattr | |
958 | * @value: xattr value to set | |
959 | * @size: size of xattr value | |
960 | * @flags: destination buffer length | |
961 | * | |
962 | * Return: 0 on success, otherwise error | |
963 | */ | |
af34983e HL |
964 | int ksmbd_vfs_setxattr(struct user_namespace *user_ns, |
965 | struct dentry *dentry, const char *attr_name, | |
070fb21e | 966 | const void *attr_value, size_t attr_size, int flags) |
f4415848 NJ |
967 | { |
968 | int err; | |
969 | ||
af34983e HL |
970 | err = vfs_setxattr(user_ns, |
971 | dentry, | |
f4415848 NJ |
972 | attr_name, |
973 | attr_value, | |
974 | attr_size, | |
975 | flags); | |
976 | if (err) | |
977 | ksmbd_debug(VFS, "setxattr failed, err %d\n", err); | |
978 | return err; | |
979 | } | |
980 | ||
981 | /** | |
982 | * ksmbd_vfs_set_fadvise() - convert smb IO caching options to linux options | |
983 | * @filp: file pointer for IO | |
984 | * @options: smb IO options | |
985 | */ | |
986 | void ksmbd_vfs_set_fadvise(struct file *filp, __le32 option) | |
987 | { | |
988 | struct address_space *mapping; | |
989 | ||
990 | mapping = filp->f_mapping; | |
991 | ||
992 | if (!option || !mapping) | |
993 | return; | |
994 | ||
64b39f4a | 995 | if (option & FILE_WRITE_THROUGH_LE) { |
f4415848 | 996 | filp->f_flags |= O_SYNC; |
64b39f4a | 997 | } else if (option & FILE_SEQUENTIAL_ONLY_LE) { |
f4415848 NJ |
998 | filp->f_ra.ra_pages = inode_to_bdi(mapping->host)->ra_pages * 2; |
999 | spin_lock(&filp->f_lock); | |
1000 | filp->f_mode &= ~FMODE_RANDOM; | |
1001 | spin_unlock(&filp->f_lock); | |
1002 | } else if (option & FILE_RANDOM_ACCESS_LE) { | |
1003 | spin_lock(&filp->f_lock); | |
1004 | filp->f_mode |= FMODE_RANDOM; | |
1005 | spin_unlock(&filp->f_lock); | |
1006 | } | |
1007 | } | |
1008 | ||
64b39f4a | 1009 | int ksmbd_vfs_zero_data(struct ksmbd_work *work, struct ksmbd_file *fp, |
070fb21e | 1010 | loff_t off, loff_t len) |
f4415848 NJ |
1011 | { |
1012 | smb_break_all_levII_oplock(work, fp, 1); | |
26a2787d | 1013 | if (fp->f_ci->m_fattr & FILE_ATTRIBUTE_SPARSE_FILE_LE) |
f4415848 | 1014 | return vfs_fallocate(fp->filp, |
070fb21e NJ |
1015 | FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, |
1016 | off, len); | |
f4415848 | 1017 | |
18e39fb9 NJ |
1018 | return vfs_fallocate(fp->filp, |
1019 | FALLOC_FL_ZERO_RANGE | FALLOC_FL_KEEP_SIZE, | |
1020 | off, len); | |
f4415848 NJ |
1021 | } |
1022 | ||
1023 | int ksmbd_vfs_fqar_lseek(struct ksmbd_file *fp, loff_t start, loff_t length, | |
070fb21e | 1024 | struct file_allocated_range_buffer *ranges, |
f7db8fd0 | 1025 | unsigned int in_count, unsigned int *out_count) |
f4415848 NJ |
1026 | { |
1027 | struct file *f = fp->filp; | |
ab0b263b | 1028 | struct inode *inode = file_inode(fp->filp); |
f4415848 NJ |
1029 | loff_t maxbytes = (u64)inode->i_sb->s_maxbytes, end; |
1030 | loff_t extent_start, extent_end; | |
1031 | int ret = 0; | |
1032 | ||
1033 | if (start > maxbytes) | |
1034 | return -EFBIG; | |
1035 | ||
1036 | if (!in_count) | |
1037 | return 0; | |
1038 | ||
1039 | /* | |
1040 | * Shrink request scope to what the fs can actually handle. | |
1041 | */ | |
1042 | if (length > maxbytes || (maxbytes - length) < start) | |
1043 | length = maxbytes - start; | |
1044 | ||
1045 | if (start + length > inode->i_size) | |
1046 | length = inode->i_size - start; | |
1047 | ||
1048 | *out_count = 0; | |
1049 | end = start + length; | |
1050 | while (start < end && *out_count < in_count) { | |
067baa9a | 1051 | extent_start = vfs_llseek(f, start, SEEK_DATA); |
f4415848 NJ |
1052 | if (extent_start < 0) { |
1053 | if (extent_start != -ENXIO) | |
1054 | ret = (int)extent_start; | |
1055 | break; | |
1056 | } | |
1057 | ||
1058 | if (extent_start >= end) | |
1059 | break; | |
1060 | ||
067baa9a | 1061 | extent_end = vfs_llseek(f, extent_start, SEEK_HOLE); |
f4415848 NJ |
1062 | if (extent_end < 0) { |
1063 | if (extent_end != -ENXIO) | |
1064 | ret = (int)extent_end; | |
1065 | break; | |
64b39f4a | 1066 | } else if (extent_start >= extent_end) { |
f4415848 | 1067 | break; |
64b39f4a | 1068 | } |
f4415848 NJ |
1069 | |
1070 | ranges[*out_count].file_offset = cpu_to_le64(extent_start); | |
1071 | ranges[(*out_count)++].length = | |
1072 | cpu_to_le64(min(extent_end, end) - extent_start); | |
1073 | ||
1074 | start = extent_end; | |
1075 | } | |
1076 | ||
1077 | return ret; | |
1078 | } | |
1079 | ||
af34983e HL |
1080 | int ksmbd_vfs_remove_xattr(struct user_namespace *user_ns, |
1081 | struct dentry *dentry, char *attr_name) | |
f4415848 | 1082 | { |
af34983e | 1083 | return vfs_removexattr(user_ns, dentry, attr_name); |
f4415848 NJ |
1084 | } |
1085 | ||
af34983e HL |
1086 | int ksmbd_vfs_unlink(struct user_namespace *user_ns, |
1087 | struct dentry *dir, struct dentry *dentry) | |
f4415848 NJ |
1088 | { |
1089 | int err = 0; | |
1090 | ||
da1e7ada | 1091 | err = ksmbd_vfs_lock_parent(user_ns, dir, dentry); |
333111a6 HL |
1092 | if (err) |
1093 | return err; | |
ff1d5727 | 1094 | dget(dentry); |
f4415848 NJ |
1095 | |
1096 | if (S_ISDIR(d_inode(dentry)->i_mode)) | |
af34983e | 1097 | err = vfs_rmdir(user_ns, d_inode(dir), dentry); |
f4415848 | 1098 | else |
af34983e | 1099 | err = vfs_unlink(user_ns, d_inode(dir), dentry, NULL); |
f4415848 | 1100 | |
f4415848 | 1101 | dput(dentry); |
ff1d5727 | 1102 | inode_unlock(d_inode(dir)); |
f4415848 NJ |
1103 | if (err) |
1104 | ksmbd_debug(VFS, "failed to delete, err %d\n", err); | |
1105 | ||
1106 | return err; | |
1107 | } | |
1108 | ||
64b39f4a | 1109 | static int __dir_empty(struct dir_context *ctx, const char *name, int namlen, |
070fb21e | 1110 | loff_t offset, u64 ino, unsigned int d_type) |
f4415848 NJ |
1111 | { |
1112 | struct ksmbd_readdir_data *buf; | |
1113 | ||
1114 | buf = container_of(ctx, struct ksmbd_readdir_data, ctx); | |
1115 | buf->dirent_count++; | |
1116 | ||
1117 | if (buf->dirent_count > 2) | |
1118 | return -ENOTEMPTY; | |
1119 | return 0; | |
1120 | } | |
1121 | ||
1122 | /** | |
1123 | * ksmbd_vfs_empty_dir() - check for empty directory | |
1124 | * @fp: ksmbd file pointer | |
1125 | * | |
1126 | * Return: true if directory empty, otherwise false | |
1127 | */ | |
1128 | int ksmbd_vfs_empty_dir(struct ksmbd_file *fp) | |
1129 | { | |
1130 | int err; | |
1131 | struct ksmbd_readdir_data readdir_data; | |
1132 | ||
1133 | memset(&readdir_data, 0, sizeof(struct ksmbd_readdir_data)); | |
1134 | ||
1135 | set_ctx_actor(&readdir_data.ctx, __dir_empty); | |
1136 | readdir_data.dirent_count = 0; | |
1137 | ||
e8c06191 | 1138 | err = iterate_dir(fp->filp, &readdir_data.ctx); |
f4415848 NJ |
1139 | if (readdir_data.dirent_count > 2) |
1140 | err = -ENOTEMPTY; | |
1141 | else | |
1142 | err = 0; | |
1143 | return err; | |
1144 | } | |
1145 | ||
64b39f4a | 1146 | static int __caseless_lookup(struct dir_context *ctx, const char *name, |
070fb21e NJ |
1147 | int namlen, loff_t offset, u64 ino, |
1148 | unsigned int d_type) | |
f4415848 NJ |
1149 | { |
1150 | struct ksmbd_readdir_data *buf; | |
1151 | ||
1152 | buf = container_of(ctx, struct ksmbd_readdir_data, ctx); | |
1153 | ||
1154 | if (buf->used != namlen) | |
1155 | return 0; | |
1156 | if (!strncasecmp((char *)buf->private, name, namlen)) { | |
1157 | memcpy((char *)buf->private, name, namlen); | |
1158 | buf->dirent_count = 1; | |
1159 | return -EEXIST; | |
1160 | } | |
1161 | return 0; | |
1162 | } | |
1163 | ||
1164 | /** | |
1165 | * ksmbd_vfs_lookup_in_dir() - lookup a file in a directory | |
3c203783 HL |
1166 | * @dir: path info |
1167 | * @name: filename to lookup | |
1168 | * @namelen: filename length | |
f4415848 NJ |
1169 | * |
1170 | * Return: 0 on success, otherwise error | |
1171 | */ | |
3c203783 | 1172 | static int ksmbd_vfs_lookup_in_dir(struct path *dir, char *name, size_t namelen) |
f4415848 | 1173 | { |
f4415848 NJ |
1174 | int ret; |
1175 | struct file *dfilp; | |
64b39f4a | 1176 | int flags = O_RDONLY | O_LARGEFILE; |
f4415848 NJ |
1177 | struct ksmbd_readdir_data readdir_data = { |
1178 | .ctx.actor = __caseless_lookup, | |
3c203783 HL |
1179 | .private = name, |
1180 | .used = namelen, | |
1181 | .dirent_count = 0, | |
f4415848 NJ |
1182 | }; |
1183 | ||
3c203783 HL |
1184 | dfilp = dentry_open(dir, flags, current_cred()); |
1185 | if (IS_ERR(dfilp)) | |
1186 | return PTR_ERR(dfilp); | |
f4415848 | 1187 | |
e8c06191 | 1188 | ret = iterate_dir(dfilp, &readdir_data.ctx); |
f4415848 NJ |
1189 | if (readdir_data.dirent_count > 0) |
1190 | ret = 0; | |
f4415848 | 1191 | fput(dfilp); |
f4415848 NJ |
1192 | return ret; |
1193 | } | |
1194 | ||
1195 | /** | |
1196 | * ksmbd_vfs_kern_path() - lookup a file and get path info | |
265fd199 | 1197 | * @name: file path that is relative to share |
f4415848 NJ |
1198 | * @flags: lookup flags |
1199 | * @path: if lookup succeed, return path info | |
1200 | * @caseless: caseless filename lookup | |
1201 | * | |
1202 | * Return: 0 on success, otherwise error | |
1203 | */ | |
265fd199 HL |
1204 | int ksmbd_vfs_kern_path(struct ksmbd_work *work, char *name, |
1205 | unsigned int flags, struct path *path, bool caseless) | |
f4415848 | 1206 | { |
265fd199 | 1207 | struct ksmbd_share_config *share_conf = work->tcon->share_conf; |
f4415848 NJ |
1208 | int err; |
1209 | ||
265fd199 HL |
1210 | flags |= LOOKUP_BENEATH; |
1211 | err = vfs_path_lookup(share_conf->vfs_path.dentry, | |
1212 | share_conf->vfs_path.mnt, | |
1213 | name, | |
1214 | flags, | |
1215 | path); | |
f4415848 | 1216 | if (!err) |
3c203783 | 1217 | return 0; |
f4415848 NJ |
1218 | |
1219 | if (caseless) { | |
3c203783 HL |
1220 | char *filepath; |
1221 | struct path parent; | |
1222 | size_t path_len, remain_len; | |
f4415848 | 1223 | |
3c203783 HL |
1224 | filepath = kstrdup(name, GFP_KERNEL); |
1225 | if (!filepath) | |
1226 | return -ENOMEM; | |
1227 | ||
1228 | path_len = strlen(filepath); | |
265fd199 | 1229 | remain_len = path_len; |
f4415848 | 1230 | |
265fd199 HL |
1231 | parent = share_conf->vfs_path; |
1232 | path_get(&parent); | |
f4415848 | 1233 | |
3c203783 HL |
1234 | while (d_can_lookup(parent.dentry)) { |
1235 | char *filename = filepath + path_len - remain_len; | |
1236 | char *next = strchrnul(filename, '/'); | |
1237 | size_t filename_len = next - filename; | |
1238 | bool is_last = !next[0]; | |
1239 | ||
1240 | if (filename_len == 0) | |
1241 | break; | |
1242 | ||
1243 | err = ksmbd_vfs_lookup_in_dir(&parent, filename, | |
1244 | filename_len); | |
265fd199 HL |
1245 | path_put(&parent); |
1246 | if (err) | |
3c203783 | 1247 | goto out; |
3c203783 | 1248 | |
3c203783 HL |
1249 | next[0] = '\0'; |
1250 | ||
265fd199 HL |
1251 | err = vfs_path_lookup(share_conf->vfs_path.dentry, |
1252 | share_conf->vfs_path.mnt, | |
1253 | filepath, | |
1254 | flags, | |
1255 | &parent); | |
3c203783 HL |
1256 | if (err) |
1257 | goto out; | |
265fd199 HL |
1258 | else if (is_last) { |
1259 | *path = parent; | |
3c203783 HL |
1260 | goto out; |
1261 | } | |
1262 | ||
1263 | next[0] = '/'; | |
1264 | remain_len -= filename_len + 1; | |
1265 | } | |
1266 | ||
1267 | path_put(&parent); | |
1268 | err = -EINVAL; | |
f4415848 | 1269 | out: |
3c203783 HL |
1270 | kfree(filepath); |
1271 | } | |
f4415848 NJ |
1272 | return err; |
1273 | } | |
1274 | ||
265fd199 HL |
1275 | struct dentry *ksmbd_vfs_kern_path_create(struct ksmbd_work *work, |
1276 | const char *name, | |
1277 | unsigned int flags, | |
1278 | struct path *path) | |
1279 | { | |
1280 | char *abs_name; | |
1281 | struct dentry *dent; | |
1282 | ||
1283 | abs_name = convert_to_unix_name(work->tcon->share_conf, name); | |
1284 | if (!abs_name) | |
1285 | return ERR_PTR(-ENOMEM); | |
1286 | ||
1287 | dent = kern_path_create(AT_FDCWD, abs_name, path, flags); | |
1288 | kfree(abs_name); | |
1289 | return dent; | |
1290 | } | |
1291 | ||
af34983e HL |
1292 | int ksmbd_vfs_remove_acl_xattrs(struct user_namespace *user_ns, |
1293 | struct dentry *dentry) | |
f4415848 NJ |
1294 | { |
1295 | char *name, *xattr_list = NULL; | |
1296 | ssize_t xattr_list_len; | |
1297 | int err = 0; | |
1298 | ||
1299 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
1300 | if (xattr_list_len < 0) { | |
1301 | goto out; | |
1302 | } else if (!xattr_list_len) { | |
1303 | ksmbd_debug(SMB, "empty xattr in the file\n"); | |
1304 | goto out; | |
1305 | } | |
1306 | ||
1307 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
070fb21e | 1308 | name += strlen(name) + 1) { |
f4415848 NJ |
1309 | ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name)); |
1310 | ||
1311 | if (!strncmp(name, XATTR_NAME_POSIX_ACL_ACCESS, | |
64b39f4a | 1312 | sizeof(XATTR_NAME_POSIX_ACL_ACCESS) - 1) || |
f4415848 | 1313 | !strncmp(name, XATTR_NAME_POSIX_ACL_DEFAULT, |
64b39f4a | 1314 | sizeof(XATTR_NAME_POSIX_ACL_DEFAULT) - 1)) { |
af34983e | 1315 | err = ksmbd_vfs_remove_xattr(user_ns, dentry, name); |
f4415848 NJ |
1316 | if (err) |
1317 | ksmbd_debug(SMB, | |
070fb21e | 1318 | "remove acl xattr failed : %s\n", name); |
f4415848 NJ |
1319 | } |
1320 | } | |
1321 | out: | |
79f6b11a | 1322 | kvfree(xattr_list); |
f4415848 NJ |
1323 | return err; |
1324 | } | |
1325 | ||
af34983e HL |
1326 | int ksmbd_vfs_remove_sd_xattrs(struct user_namespace *user_ns, |
1327 | struct dentry *dentry) | |
f4415848 NJ |
1328 | { |
1329 | char *name, *xattr_list = NULL; | |
1330 | ssize_t xattr_list_len; | |
1331 | int err = 0; | |
1332 | ||
1333 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
1334 | if (xattr_list_len < 0) { | |
1335 | goto out; | |
1336 | } else if (!xattr_list_len) { | |
1337 | ksmbd_debug(SMB, "empty xattr in the file\n"); | |
1338 | goto out; | |
1339 | } | |
1340 | ||
1341 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
1342 | name += strlen(name) + 1) { | |
1343 | ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name)); | |
1344 | ||
1345 | if (!strncmp(name, XATTR_NAME_SD, XATTR_NAME_SD_LEN)) { | |
af34983e | 1346 | err = ksmbd_vfs_remove_xattr(user_ns, dentry, name); |
f4415848 NJ |
1347 | if (err) |
1348 | ksmbd_debug(SMB, "remove xattr failed : %s\n", name); | |
1349 | } | |
1350 | } | |
1351 | out: | |
79f6b11a | 1352 | kvfree(xattr_list); |
f4415848 NJ |
1353 | return err; |
1354 | } | |
1355 | ||
af34983e HL |
1356 | static struct xattr_smb_acl *ksmbd_vfs_make_xattr_posix_acl(struct user_namespace *user_ns, |
1357 | struct inode *inode, | |
070fb21e | 1358 | int acl_type) |
f4415848 NJ |
1359 | { |
1360 | struct xattr_smb_acl *smb_acl = NULL; | |
1361 | struct posix_acl *posix_acls; | |
1362 | struct posix_acl_entry *pa_entry; | |
1363 | struct xattr_acl_entry *xa_entry; | |
1364 | int i; | |
1365 | ||
777cad16 NJ |
1366 | if (!IS_ENABLED(CONFIG_FS_POSIX_ACL)) |
1367 | return NULL; | |
1368 | ||
67d1c432 | 1369 | posix_acls = get_acl(inode, acl_type); |
f4415848 NJ |
1370 | if (!posix_acls) |
1371 | return NULL; | |
1372 | ||
1373 | smb_acl = kzalloc(sizeof(struct xattr_smb_acl) + | |
1374 | sizeof(struct xattr_acl_entry) * posix_acls->a_count, | |
1375 | GFP_KERNEL); | |
1376 | if (!smb_acl) | |
1377 | goto out; | |
1378 | ||
1379 | smb_acl->count = posix_acls->a_count; | |
1380 | pa_entry = posix_acls->a_entries; | |
1381 | xa_entry = smb_acl->entries; | |
1382 | for (i = 0; i < posix_acls->a_count; i++, pa_entry++, xa_entry++) { | |
1383 | switch (pa_entry->e_tag) { | |
1384 | case ACL_USER: | |
1385 | xa_entry->type = SMB_ACL_USER; | |
0e844efe | 1386 | xa_entry->uid = posix_acl_uid_translate(user_ns, pa_entry); |
f4415848 NJ |
1387 | break; |
1388 | case ACL_USER_OBJ: | |
1389 | xa_entry->type = SMB_ACL_USER_OBJ; | |
1390 | break; | |
1391 | case ACL_GROUP: | |
1392 | xa_entry->type = SMB_ACL_GROUP; | |
0e844efe | 1393 | xa_entry->gid = posix_acl_gid_translate(user_ns, pa_entry); |
f4415848 NJ |
1394 | break; |
1395 | case ACL_GROUP_OBJ: | |
1396 | xa_entry->type = SMB_ACL_GROUP_OBJ; | |
1397 | break; | |
1398 | case ACL_OTHER: | |
1399 | xa_entry->type = SMB_ACL_OTHER; | |
1400 | break; | |
1401 | case ACL_MASK: | |
1402 | xa_entry->type = SMB_ACL_MASK; | |
1403 | break; | |
1404 | default: | |
bde1694a | 1405 | pr_err("unknown type : 0x%x\n", pa_entry->e_tag); |
f4415848 NJ |
1406 | goto out; |
1407 | } | |
1408 | ||
1409 | if (pa_entry->e_perm & ACL_READ) | |
1410 | xa_entry->perm |= SMB_ACL_READ; | |
1411 | if (pa_entry->e_perm & ACL_WRITE) | |
1412 | xa_entry->perm |= SMB_ACL_WRITE; | |
1413 | if (pa_entry->e_perm & ACL_EXECUTE) | |
1414 | xa_entry->perm |= SMB_ACL_EXECUTE; | |
1415 | } | |
1416 | out: | |
1417 | posix_acl_release(posix_acls); | |
1418 | return smb_acl; | |
1419 | } | |
1420 | ||
af34983e HL |
1421 | int ksmbd_vfs_set_sd_xattr(struct ksmbd_conn *conn, |
1422 | struct user_namespace *user_ns, | |
1423 | struct dentry *dentry, | |
070fb21e | 1424 | struct smb_ntsd *pntsd, int len) |
f4415848 NJ |
1425 | { |
1426 | int rc; | |
1427 | struct ndr sd_ndr = {0}, acl_ndr = {0}; | |
1428 | struct xattr_ntacl acl = {0}; | |
1429 | struct xattr_smb_acl *smb_acl, *def_smb_acl = NULL; | |
fba08fa0 | 1430 | struct inode *inode = d_inode(dentry); |
f4415848 NJ |
1431 | |
1432 | acl.version = 4; | |
1433 | acl.hash_type = XATTR_SD_HASH_TYPE_SHA256; | |
fba08fa0 | 1434 | acl.current_time = ksmbd_UnixTimeToNT(current_time(inode)); |
f4415848 NJ |
1435 | |
1436 | memcpy(acl.desc, "posix_acl", 9); | |
1437 | acl.desc_len = 10; | |
1438 | ||
1439 | pntsd->osidoffset = | |
1440 | cpu_to_le32(le32_to_cpu(pntsd->osidoffset) + NDR_NTSD_OFFSETOF); | |
1441 | pntsd->gsidoffset = | |
1442 | cpu_to_le32(le32_to_cpu(pntsd->gsidoffset) + NDR_NTSD_OFFSETOF); | |
1443 | pntsd->dacloffset = | |
1444 | cpu_to_le32(le32_to_cpu(pntsd->dacloffset) + NDR_NTSD_OFFSETOF); | |
1445 | ||
1446 | acl.sd_buf = (char *)pntsd; | |
1447 | acl.sd_size = len; | |
1448 | ||
1449 | rc = ksmbd_gen_sd_hash(conn, acl.sd_buf, acl.sd_size, acl.hash); | |
1450 | if (rc) { | |
bde1694a | 1451 | pr_err("failed to generate hash for ndr acl\n"); |
f4415848 NJ |
1452 | return rc; |
1453 | } | |
1454 | ||
af34983e HL |
1455 | smb_acl = ksmbd_vfs_make_xattr_posix_acl(user_ns, inode, |
1456 | ACL_TYPE_ACCESS); | |
f4415848 | 1457 | if (S_ISDIR(inode->i_mode)) |
af34983e | 1458 | def_smb_acl = ksmbd_vfs_make_xattr_posix_acl(user_ns, inode, |
070fb21e | 1459 | ACL_TYPE_DEFAULT); |
f4415848 | 1460 | |
af34983e HL |
1461 | rc = ndr_encode_posix_acl(&acl_ndr, user_ns, inode, |
1462 | smb_acl, def_smb_acl); | |
f4415848 | 1463 | if (rc) { |
bde1694a | 1464 | pr_err("failed to encode ndr to posix acl\n"); |
f4415848 NJ |
1465 | goto out; |
1466 | } | |
1467 | ||
1468 | rc = ksmbd_gen_sd_hash(conn, acl_ndr.data, acl_ndr.offset, | |
070fb21e | 1469 | acl.posix_acl_hash); |
f4415848 | 1470 | if (rc) { |
bde1694a | 1471 | pr_err("failed to generate hash for ndr acl\n"); |
f4415848 NJ |
1472 | goto out; |
1473 | } | |
1474 | ||
1475 | rc = ndr_encode_v4_ntacl(&sd_ndr, &acl); | |
1476 | if (rc) { | |
bde1694a | 1477 | pr_err("failed to encode ndr to posix acl\n"); |
f4415848 NJ |
1478 | goto out; |
1479 | } | |
1480 | ||
af34983e HL |
1481 | rc = ksmbd_vfs_setxattr(user_ns, dentry, |
1482 | XATTR_NAME_SD, sd_ndr.data, | |
070fb21e | 1483 | sd_ndr.offset, 0); |
f4415848 | 1484 | if (rc < 0) |
bde1694a | 1485 | pr_err("Failed to store XATTR ntacl :%d\n", rc); |
f4415848 NJ |
1486 | |
1487 | kfree(sd_ndr.data); | |
1488 | out: | |
1489 | kfree(acl_ndr.data); | |
1490 | kfree(smb_acl); | |
1491 | kfree(def_smb_acl); | |
1492 | return rc; | |
1493 | } | |
1494 | ||
af34983e HL |
1495 | int ksmbd_vfs_get_sd_xattr(struct ksmbd_conn *conn, |
1496 | struct user_namespace *user_ns, | |
1497 | struct dentry *dentry, | |
070fb21e | 1498 | struct smb_ntsd **pntsd) |
f4415848 NJ |
1499 | { |
1500 | int rc; | |
1501 | struct ndr n; | |
78ad2c27 NJ |
1502 | struct inode *inode = d_inode(dentry); |
1503 | struct ndr acl_ndr = {0}; | |
1504 | struct xattr_ntacl acl; | |
1505 | struct xattr_smb_acl *smb_acl = NULL, *def_smb_acl = NULL; | |
1506 | __u8 cmp_hash[XATTR_SD_HASH_SIZE] = {0}; | |
f4415848 | 1507 | |
af34983e | 1508 | rc = ksmbd_vfs_getxattr(user_ns, dentry, XATTR_NAME_SD, &n.data); |
78ad2c27 NJ |
1509 | if (rc <= 0) |
1510 | return rc; | |
f4415848 | 1511 | |
78ad2c27 NJ |
1512 | n.length = rc; |
1513 | rc = ndr_decode_v4_ntacl(&n, &acl); | |
1514 | if (rc) | |
1515 | goto free_n_data; | |
f4415848 | 1516 | |
78ad2c27 NJ |
1517 | smb_acl = ksmbd_vfs_make_xattr_posix_acl(user_ns, inode, |
1518 | ACL_TYPE_ACCESS); | |
1519 | if (S_ISDIR(inode->i_mode)) | |
1520 | def_smb_acl = ksmbd_vfs_make_xattr_posix_acl(user_ns, inode, | |
1521 | ACL_TYPE_DEFAULT); | |
f4415848 | 1522 | |
78ad2c27 NJ |
1523 | rc = ndr_encode_posix_acl(&acl_ndr, user_ns, inode, smb_acl, |
1524 | def_smb_acl); | |
1525 | if (rc) { | |
1526 | pr_err("failed to encode ndr to posix acl\n"); | |
1527 | goto out_free; | |
1528 | } | |
f4415848 | 1529 | |
78ad2c27 NJ |
1530 | rc = ksmbd_gen_sd_hash(conn, acl_ndr.data, acl_ndr.offset, cmp_hash); |
1531 | if (rc) { | |
1532 | pr_err("failed to generate hash for ndr acl\n"); | |
1533 | goto out_free; | |
1534 | } | |
1535 | ||
1536 | if (memcmp(cmp_hash, acl.posix_acl_hash, XATTR_SD_HASH_SIZE)) { | |
1537 | pr_err("hash value diff\n"); | |
1538 | rc = -EINVAL; | |
1539 | goto out_free; | |
1540 | } | |
1541 | ||
1542 | *pntsd = acl.sd_buf; | |
1543 | (*pntsd)->osidoffset = cpu_to_le32(le32_to_cpu((*pntsd)->osidoffset) - | |
1544 | NDR_NTSD_OFFSETOF); | |
1545 | (*pntsd)->gsidoffset = cpu_to_le32(le32_to_cpu((*pntsd)->gsidoffset) - | |
1546 | NDR_NTSD_OFFSETOF); | |
1547 | (*pntsd)->dacloffset = cpu_to_le32(le32_to_cpu((*pntsd)->dacloffset) - | |
1548 | NDR_NTSD_OFFSETOF); | |
1549 | ||
1550 | rc = acl.sd_size; | |
1551 | out_free: | |
1552 | kfree(acl_ndr.data); | |
1553 | kfree(smb_acl); | |
1554 | kfree(def_smb_acl); | |
1555 | if (rc < 0) { | |
1556 | kfree(acl.sd_buf); | |
1557 | *pntsd = NULL; | |
f4415848 NJ |
1558 | } |
1559 | ||
78ad2c27 NJ |
1560 | free_n_data: |
1561 | kfree(n.data); | |
f4415848 NJ |
1562 | return rc; |
1563 | } | |
1564 | ||
af34983e HL |
1565 | int ksmbd_vfs_set_dos_attrib_xattr(struct user_namespace *user_ns, |
1566 | struct dentry *dentry, | |
070fb21e | 1567 | struct xattr_dos_attrib *da) |
f4415848 NJ |
1568 | { |
1569 | struct ndr n; | |
1570 | int err; | |
1571 | ||
1572 | err = ndr_encode_dos_attr(&n, da); | |
1573 | if (err) | |
1574 | return err; | |
1575 | ||
af34983e | 1576 | err = ksmbd_vfs_setxattr(user_ns, dentry, XATTR_NAME_DOS_ATTRIBUTE, |
070fb21e | 1577 | (void *)n.data, n.offset, 0); |
f4415848 NJ |
1578 | if (err) |
1579 | ksmbd_debug(SMB, "failed to store dos attribute in xattr\n"); | |
1580 | kfree(n.data); | |
1581 | ||
1582 | return err; | |
1583 | } | |
1584 | ||
af34983e HL |
1585 | int ksmbd_vfs_get_dos_attrib_xattr(struct user_namespace *user_ns, |
1586 | struct dentry *dentry, | |
070fb21e | 1587 | struct xattr_dos_attrib *da) |
f4415848 NJ |
1588 | { |
1589 | struct ndr n; | |
1590 | int err; | |
1591 | ||
af34983e | 1592 | err = ksmbd_vfs_getxattr(user_ns, dentry, XATTR_NAME_DOS_ATTRIBUTE, |
070fb21e | 1593 | (char **)&n.data); |
f4415848 NJ |
1594 | if (err > 0) { |
1595 | n.length = err; | |
1596 | if (ndr_decode_dos_attr(&n, da)) | |
1597 | err = -EINVAL; | |
79f6b11a | 1598 | kfree(n.data); |
64b39f4a | 1599 | } else { |
f4415848 | 1600 | ksmbd_debug(SMB, "failed to load dos attribute in xattr\n"); |
64b39f4a | 1601 | } |
f4415848 NJ |
1602 | |
1603 | return err; | |
1604 | } | |
1605 | ||
f4415848 NJ |
1606 | /** |
1607 | * ksmbd_vfs_init_kstat() - convert unix stat information to smb stat format | |
1608 | * @p: destination buffer | |
1609 | * @ksmbd_kstat: ksmbd kstat wrapper | |
1610 | */ | |
1611 | void *ksmbd_vfs_init_kstat(char **p, struct ksmbd_kstat *ksmbd_kstat) | |
1612 | { | |
1613 | struct file_directory_info *info = (struct file_directory_info *)(*p); | |
1614 | struct kstat *kstat = ksmbd_kstat->kstat; | |
1615 | u64 time; | |
1616 | ||
1617 | info->FileIndex = 0; | |
1618 | info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time); | |
1619 | time = ksmbd_UnixTimeToNT(kstat->atime); | |
1620 | info->LastAccessTime = cpu_to_le64(time); | |
1621 | time = ksmbd_UnixTimeToNT(kstat->mtime); | |
1622 | info->LastWriteTime = cpu_to_le64(time); | |
1623 | time = ksmbd_UnixTimeToNT(kstat->ctime); | |
1624 | info->ChangeTime = cpu_to_le64(time); | |
1625 | ||
26a2787d | 1626 | if (ksmbd_kstat->file_attributes & FILE_ATTRIBUTE_DIRECTORY_LE) { |
f4415848 NJ |
1627 | info->EndOfFile = 0; |
1628 | info->AllocationSize = 0; | |
1629 | } else { | |
1630 | info->EndOfFile = cpu_to_le64(kstat->size); | |
1631 | info->AllocationSize = cpu_to_le64(kstat->blocks << 9); | |
1632 | } | |
1633 | info->ExtFileAttributes = ksmbd_kstat->file_attributes; | |
1634 | ||
1635 | return info; | |
1636 | } | |
1637 | ||
af34983e HL |
1638 | int ksmbd_vfs_fill_dentry_attrs(struct ksmbd_work *work, |
1639 | struct user_namespace *user_ns, | |
1640 | struct dentry *dentry, | |
070fb21e | 1641 | struct ksmbd_kstat *ksmbd_kstat) |
f4415848 NJ |
1642 | { |
1643 | u64 time; | |
1644 | int rc; | |
1645 | ||
af34983e | 1646 | generic_fillattr(user_ns, d_inode(dentry), ksmbd_kstat->kstat); |
f4415848 NJ |
1647 | |
1648 | time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime); | |
1649 | ksmbd_kstat->create_time = time; | |
1650 | ||
1651 | /* | |
1652 | * set default value for the case that store dos attributes is not yes | |
1653 | * or that acl is disable in server's filesystem and the config is yes. | |
1654 | */ | |
1655 | if (S_ISDIR(ksmbd_kstat->kstat->mode)) | |
26a2787d | 1656 | ksmbd_kstat->file_attributes = FILE_ATTRIBUTE_DIRECTORY_LE; |
f4415848 | 1657 | else |
26a2787d | 1658 | ksmbd_kstat->file_attributes = FILE_ATTRIBUTE_ARCHIVE_LE; |
f4415848 NJ |
1659 | |
1660 | if (test_share_config_flag(work->tcon->share_conf, | |
64b39f4a | 1661 | KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) { |
f4415848 NJ |
1662 | struct xattr_dos_attrib da; |
1663 | ||
af34983e | 1664 | rc = ksmbd_vfs_get_dos_attrib_xattr(user_ns, dentry, &da); |
f4415848 NJ |
1665 | if (rc > 0) { |
1666 | ksmbd_kstat->file_attributes = cpu_to_le32(da.attr); | |
1667 | ksmbd_kstat->create_time = da.create_time; | |
64b39f4a | 1668 | } else { |
f4415848 | 1669 | ksmbd_debug(VFS, "fail to load dos attribute.\n"); |
64b39f4a | 1670 | } |
f4415848 NJ |
1671 | } |
1672 | ||
1673 | return 0; | |
1674 | } | |
1675 | ||
af34983e HL |
1676 | ssize_t ksmbd_vfs_casexattr_len(struct user_namespace *user_ns, |
1677 | struct dentry *dentry, char *attr_name, | |
070fb21e | 1678 | int attr_name_len) |
f4415848 NJ |
1679 | { |
1680 | char *name, *xattr_list = NULL; | |
1681 | ssize_t value_len = -ENOENT, xattr_list_len; | |
1682 | ||
1683 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
1684 | if (xattr_list_len <= 0) | |
1685 | goto out; | |
1686 | ||
1687 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
1688 | name += strlen(name) + 1) { | |
1689 | ksmbd_debug(VFS, "%s, len %zd\n", name, strlen(name)); | |
1690 | if (strncasecmp(attr_name, name, attr_name_len)) | |
1691 | continue; | |
1692 | ||
af34983e | 1693 | value_len = ksmbd_vfs_xattr_len(user_ns, dentry, name); |
f4415848 NJ |
1694 | break; |
1695 | } | |
1696 | ||
1697 | out: | |
79f6b11a | 1698 | kvfree(xattr_list); |
f4415848 NJ |
1699 | return value_len; |
1700 | } | |
1701 | ||
64b39f4a | 1702 | int ksmbd_vfs_xattr_stream_name(char *stream_name, char **xattr_stream_name, |
070fb21e | 1703 | size_t *xattr_stream_name_size, int s_type) |
f4415848 | 1704 | { |
07781de9 | 1705 | char *type, *buf; |
f4415848 NJ |
1706 | |
1707 | if (s_type == DIR_STREAM) | |
1708 | type = ":$INDEX_ALLOCATION"; | |
1709 | else | |
1710 | type = ":$DATA"; | |
1711 | ||
07781de9 DC |
1712 | buf = kasprintf(GFP_KERNEL, "%s%s%s", |
1713 | XATTR_NAME_STREAM, stream_name, type); | |
1714 | if (!buf) | |
f4415848 NJ |
1715 | return -ENOMEM; |
1716 | ||
07781de9 DC |
1717 | *xattr_stream_name = buf; |
1718 | *xattr_stream_name_size = strlen(buf) + 1; | |
f4415848 NJ |
1719 | |
1720 | return 0; | |
1721 | } | |
1722 | ||
f4415848 | 1723 | int ksmbd_vfs_copy_file_ranges(struct ksmbd_work *work, |
070fb21e NJ |
1724 | struct ksmbd_file *src_fp, |
1725 | struct ksmbd_file *dst_fp, | |
1726 | struct srv_copychunk *chunks, | |
1727 | unsigned int chunk_count, | |
1728 | unsigned int *chunk_count_written, | |
1729 | unsigned int *chunk_size_written, | |
1730 | loff_t *total_size_written) | |
f4415848 NJ |
1731 | { |
1732 | unsigned int i; | |
1733 | loff_t src_off, dst_off, src_file_size; | |
1734 | size_t len; | |
1735 | int ret; | |
1736 | ||
1737 | *chunk_count_written = 0; | |
1738 | *chunk_size_written = 0; | |
1739 | *total_size_written = 0; | |
1740 | ||
1741 | if (!(src_fp->daccess & (FILE_READ_DATA_LE | FILE_EXECUTE_LE))) { | |
493fa2fb | 1742 | pr_err("no right to read(%pd)\n", src_fp->filp->f_path.dentry); |
f4415848 NJ |
1743 | return -EACCES; |
1744 | } | |
1745 | if (!(dst_fp->daccess & (FILE_WRITE_DATA_LE | FILE_APPEND_DATA_LE))) { | |
493fa2fb | 1746 | pr_err("no right to write(%pd)\n", dst_fp->filp->f_path.dentry); |
f4415848 NJ |
1747 | return -EACCES; |
1748 | } | |
1749 | ||
1750 | if (ksmbd_stream_fd(src_fp) || ksmbd_stream_fd(dst_fp)) | |
1751 | return -EBADF; | |
1752 | ||
1753 | smb_break_all_levII_oplock(work, dst_fp, 1); | |
1754 | ||
c36fca86 NJ |
1755 | if (!work->tcon->posix_extensions) { |
1756 | for (i = 0; i < chunk_count; i++) { | |
1757 | src_off = le64_to_cpu(chunks[i].SourceOffset); | |
1758 | dst_off = le64_to_cpu(chunks[i].TargetOffset); | |
1759 | len = le32_to_cpu(chunks[i].Length); | |
1760 | ||
1761 | if (check_lock_range(src_fp->filp, src_off, | |
64b39f4a | 1762 | src_off + len - 1, READ)) |
c36fca86 NJ |
1763 | return -EAGAIN; |
1764 | if (check_lock_range(dst_fp->filp, dst_off, | |
64b39f4a | 1765 | dst_off + len - 1, WRITE)) |
c36fca86 NJ |
1766 | return -EAGAIN; |
1767 | } | |
f4415848 NJ |
1768 | } |
1769 | ||
1770 | src_file_size = i_size_read(file_inode(src_fp->filp)); | |
1771 | ||
1772 | for (i = 0; i < chunk_count; i++) { | |
1773 | src_off = le64_to_cpu(chunks[i].SourceOffset); | |
1774 | dst_off = le64_to_cpu(chunks[i].TargetOffset); | |
1775 | len = le32_to_cpu(chunks[i].Length); | |
1776 | ||
1777 | if (src_off + len > src_file_size) | |
1778 | return -E2BIG; | |
1779 | ||
f8524776 NJ |
1780 | ret = vfs_copy_file_range(src_fp->filp, src_off, |
1781 | dst_fp->filp, dst_off, len, 0); | |
868f9f2f AG |
1782 | if (ret == -EOPNOTSUPP || ret == -EXDEV) |
1783 | ret = generic_copy_file_range(src_fp->filp, src_off, | |
1784 | dst_fp->filp, dst_off, | |
1785 | len, 0); | |
f4415848 NJ |
1786 | if (ret < 0) |
1787 | return ret; | |
1788 | ||
1789 | *chunk_count_written += 1; | |
1790 | *total_size_written += ret; | |
1791 | } | |
1792 | return 0; | |
1793 | } | |
1794 | ||
45a64e8b | 1795 | void ksmbd_vfs_posix_lock_wait(struct file_lock *flock) |
f4415848 | 1796 | { |
45a64e8b | 1797 | wait_event(flock->fl_wait, !flock->fl_blocker); |
f4415848 NJ |
1798 | } |
1799 | ||
1800 | int ksmbd_vfs_posix_lock_wait_timeout(struct file_lock *flock, long timeout) | |
1801 | { | |
1802 | return wait_event_interruptible_timeout(flock->fl_wait, | |
1803 | !flock->fl_blocker, | |
1804 | timeout); | |
1805 | } | |
1806 | ||
1807 | void ksmbd_vfs_posix_lock_unblock(struct file_lock *flock) | |
1808 | { | |
1809 | locks_delete_block(flock); | |
1810 | } | |
1811 | ||
af34983e HL |
1812 | int ksmbd_vfs_set_init_posix_acl(struct user_namespace *user_ns, |
1813 | struct inode *inode) | |
f4415848 NJ |
1814 | { |
1815 | struct posix_acl_state acl_state; | |
1816 | struct posix_acl *acls; | |
1817 | int rc; | |
1818 | ||
777cad16 NJ |
1819 | if (!IS_ENABLED(CONFIG_FS_POSIX_ACL)) |
1820 | return -EOPNOTSUPP; | |
1821 | ||
f4415848 NJ |
1822 | ksmbd_debug(SMB, "Set posix acls\n"); |
1823 | rc = init_acl_state(&acl_state, 1); | |
1824 | if (rc) | |
1825 | return rc; | |
1826 | ||
1827 | /* Set default owner group */ | |
1828 | acl_state.owner.allow = (inode->i_mode & 0700) >> 6; | |
1829 | acl_state.group.allow = (inode->i_mode & 0070) >> 3; | |
1830 | acl_state.other.allow = inode->i_mode & 0007; | |
1831 | acl_state.users->aces[acl_state.users->n].uid = inode->i_uid; | |
1832 | acl_state.users->aces[acl_state.users->n++].perms.allow = | |
1833 | acl_state.owner.allow; | |
1834 | acl_state.groups->aces[acl_state.groups->n].gid = inode->i_gid; | |
1835 | acl_state.groups->aces[acl_state.groups->n++].perms.allow = | |
1836 | acl_state.group.allow; | |
1837 | acl_state.mask.allow = 0x07; | |
1838 | ||
67d1c432 | 1839 | acls = posix_acl_alloc(6, GFP_KERNEL); |
f4415848 NJ |
1840 | if (!acls) { |
1841 | free_acl_state(&acl_state); | |
1842 | return -ENOMEM; | |
1843 | } | |
1844 | posix_state_to_acl(&acl_state, acls->a_entries); | |
af34983e | 1845 | rc = set_posix_acl(user_ns, inode, ACL_TYPE_ACCESS, acls); |
f4415848 NJ |
1846 | if (rc < 0) |
1847 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_ACCESS) failed, rc : %d\n", | |
070fb21e | 1848 | rc); |
f4415848 NJ |
1849 | else if (S_ISDIR(inode->i_mode)) { |
1850 | posix_state_to_acl(&acl_state, acls->a_entries); | |
af34983e | 1851 | rc = set_posix_acl(user_ns, inode, ACL_TYPE_DEFAULT, |
67d1c432 | 1852 | acls); |
f4415848 NJ |
1853 | if (rc < 0) |
1854 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_DEFAULT) failed, rc : %d\n", | |
070fb21e | 1855 | rc); |
f4415848 NJ |
1856 | } |
1857 | free_acl_state(&acl_state); | |
1858 | posix_acl_release(acls); | |
1859 | return rc; | |
1860 | } | |
1861 | ||
af34983e HL |
1862 | int ksmbd_vfs_inherit_posix_acl(struct user_namespace *user_ns, |
1863 | struct inode *inode, struct inode *parent_inode) | |
f4415848 NJ |
1864 | { |
1865 | struct posix_acl *acls; | |
1866 | struct posix_acl_entry *pace; | |
1867 | int rc, i; | |
1868 | ||
777cad16 NJ |
1869 | if (!IS_ENABLED(CONFIG_FS_POSIX_ACL)) |
1870 | return -EOPNOTSUPP; | |
1871 | ||
67d1c432 | 1872 | acls = get_acl(parent_inode, ACL_TYPE_DEFAULT); |
f4415848 NJ |
1873 | if (!acls) |
1874 | return -ENOENT; | |
1875 | pace = acls->a_entries; | |
1876 | ||
1877 | for (i = 0; i < acls->a_count; i++, pace++) { | |
1878 | if (pace->e_tag == ACL_MASK) { | |
1879 | pace->e_perm = 0x07; | |
1880 | break; | |
1881 | } | |
1882 | } | |
1883 | ||
af34983e | 1884 | rc = set_posix_acl(user_ns, inode, ACL_TYPE_ACCESS, acls); |
f4415848 NJ |
1885 | if (rc < 0) |
1886 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_ACCESS) failed, rc : %d\n", | |
070fb21e | 1887 | rc); |
f4415848 | 1888 | if (S_ISDIR(inode->i_mode)) { |
af34983e | 1889 | rc = set_posix_acl(user_ns, inode, ACL_TYPE_DEFAULT, |
67d1c432 | 1890 | acls); |
f4415848 NJ |
1891 | if (rc < 0) |
1892 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_DEFAULT) failed, rc : %d\n", | |
070fb21e | 1893 | rc); |
f4415848 NJ |
1894 | } |
1895 | posix_acl_release(acls); | |
1896 | return rc; | |
1897 | } |