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f4415848 NJ |
1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* | |
3 | * Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org> | |
4 | * Copyright (C) 2018 Samsung Electronics Co., Ltd. | |
5 | */ | |
6 | ||
7 | #include <linux/kernel.h> | |
8 | #include <linux/fs.h> | |
9 | #include <linux/uaccess.h> | |
10 | #include <linux/backing-dev.h> | |
11 | #include <linux/writeback.h> | |
f4415848 NJ |
12 | #include <linux/xattr.h> |
13 | #include <linux/falloc.h> | |
14 | #include <linux/genhd.h> | |
f4415848 NJ |
15 | #include <linux/fsnotify.h> |
16 | #include <linux/dcache.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/vmalloc.h> | |
19 | #include <linux/sched/xacct.h> | |
20 | #include <linux/crc32c.h> | |
21 | ||
22 | #include "glob.h" | |
23 | #include "oplock.h" | |
24 | #include "connection.h" | |
f4415848 NJ |
25 | #include "vfs.h" |
26 | #include "vfs_cache.h" | |
27 | #include "smbacl.h" | |
28 | #include "ndr.h" | |
29 | #include "auth.h" | |
5626518e | 30 | #include "misc.h" |
f4415848 | 31 | |
f4415848 NJ |
32 | #include "smb_common.h" |
33 | #include "mgmt/share_config.h" | |
34 | #include "mgmt/tree_connect.h" | |
35 | #include "mgmt/user_session.h" | |
36 | #include "mgmt/user_config.h" | |
37 | ||
38 | static char *extract_last_component(char *path) | |
39 | { | |
40 | char *p = strrchr(path, '/'); | |
41 | ||
42 | if (p && p[1] != '\0') { | |
43 | *p = '\0'; | |
44 | p++; | |
45 | } else { | |
46 | p = NULL; | |
bde1694a | 47 | pr_err("Invalid path %s\n", path); |
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 | |
158 | * @name: file name | |
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 | ||
169 | dentry = kern_path_create(AT_FDCWD, name, &path, 0); | |
170 | if (IS_ERR(dentry)) { | |
171 | err = PTR_ERR(dentry); | |
172 | if (err != -ENOENT) | |
bde1694a NJ |
173 | pr_err("path create failed for %s, err %d\n", |
174 | name, err); | |
f4415848 NJ |
175 | return err; |
176 | } | |
177 | ||
178 | mode |= S_IFREG; | |
af34983e HL |
179 | err = vfs_create(mnt_user_ns(path.mnt), d_inode(path.dentry), |
180 | dentry, mode, true); | |
f4415848 NJ |
181 | if (!err) { |
182 | ksmbd_vfs_inherit_owner(work, d_inode(path.dentry), | |
070fb21e | 183 | d_inode(dentry)); |
f4415848 | 184 | } else { |
bde1694a | 185 | pr_err("File(%s): creation failed (err:%d)\n", name, err); |
f4415848 NJ |
186 | } |
187 | done_path_create(&path, dentry); | |
188 | return err; | |
189 | } | |
190 | ||
191 | /** | |
192 | * ksmbd_vfs_mkdir() - vfs helper for smb create directory | |
193 | * @work: work | |
194 | * @name: directory name | |
195 | * @mode: directory create mode | |
196 | * | |
197 | * Return: 0 on success, otherwise error | |
198 | */ | |
64b39f4a | 199 | int ksmbd_vfs_mkdir(struct ksmbd_work *work, const char *name, umode_t mode) |
f4415848 | 200 | { |
da1e7ada | 201 | struct user_namespace *user_ns; |
f4415848 NJ |
202 | struct path path; |
203 | struct dentry *dentry; | |
204 | int err; | |
205 | ||
206 | dentry = kern_path_create(AT_FDCWD, name, &path, LOOKUP_DIRECTORY); | |
207 | if (IS_ERR(dentry)) { | |
208 | err = PTR_ERR(dentry); | |
209 | if (err != -EEXIST) | |
210 | ksmbd_debug(VFS, "path create failed for %s, err %d\n", | |
070fb21e | 211 | name, err); |
f4415848 NJ |
212 | return err; |
213 | } | |
214 | ||
da1e7ada | 215 | user_ns = mnt_user_ns(path.mnt); |
f4415848 | 216 | mode |= S_IFDIR; |
da1e7ada | 217 | err = vfs_mkdir(user_ns, d_inode(path.dentry), dentry, mode); |
a2d6321b | 218 | if (err) { |
16370235 | 219 | goto out; |
a2d6321b | 220 | } else if (d_unhashed(dentry)) { |
16370235 HL |
221 | struct dentry *d; |
222 | ||
da1e7ada CB |
223 | d = lookup_one(user_ns, dentry->d_name.name, dentry->d_parent, |
224 | dentry->d_name.len); | |
16370235 HL |
225 | if (IS_ERR(d)) { |
226 | err = PTR_ERR(d); | |
227 | goto out; | |
228 | } | |
229 | if (unlikely(d_is_negative(d))) { | |
230 | dput(d); | |
231 | err = -ENOENT; | |
232 | goto out; | |
233 | } | |
234 | ||
070fb21e | 235 | ksmbd_vfs_inherit_owner(work, d_inode(path.dentry), d_inode(d)); |
16370235 | 236 | dput(d); |
64b39f4a | 237 | } |
16370235 | 238 | out: |
f4415848 | 239 | done_path_create(&path, dentry); |
16370235 | 240 | if (err) |
bde1694a | 241 | pr_err("mkdir(%s): creation failed (err:%d)\n", name, err); |
f4415848 NJ |
242 | return err; |
243 | } | |
244 | ||
af34983e HL |
245 | static ssize_t ksmbd_vfs_getcasexattr(struct user_namespace *user_ns, |
246 | struct dentry *dentry, char *attr_name, | |
070fb21e | 247 | int attr_name_len, char **attr_value) |
f4415848 NJ |
248 | { |
249 | char *name, *xattr_list = NULL; | |
250 | ssize_t value_len = -ENOENT, xattr_list_len; | |
251 | ||
252 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
253 | if (xattr_list_len <= 0) | |
254 | goto out; | |
255 | ||
256 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
257 | name += strlen(name) + 1) { | |
258 | ksmbd_debug(VFS, "%s, len %zd\n", name, strlen(name)); | |
259 | if (strncasecmp(attr_name, name, attr_name_len)) | |
260 | continue; | |
261 | ||
af34983e HL |
262 | value_len = ksmbd_vfs_getxattr(user_ns, |
263 | dentry, | |
f4415848 NJ |
264 | name, |
265 | attr_value); | |
266 | if (value_len < 0) | |
bde1694a | 267 | pr_err("failed to get xattr in file\n"); |
f4415848 NJ |
268 | break; |
269 | } | |
270 | ||
271 | out: | |
79f6b11a | 272 | kvfree(xattr_list); |
f4415848 NJ |
273 | return value_len; |
274 | } | |
275 | ||
276 | static int ksmbd_vfs_stream_read(struct ksmbd_file *fp, char *buf, loff_t *pos, | |
070fb21e | 277 | size_t count) |
f4415848 NJ |
278 | { |
279 | ssize_t v_len; | |
280 | char *stream_buf = NULL; | |
f4415848 NJ |
281 | |
282 | ksmbd_debug(VFS, "read stream data pos : %llu, count : %zd\n", | |
070fb21e | 283 | *pos, count); |
f4415848 | 284 | |
af34983e HL |
285 | v_len = ksmbd_vfs_getcasexattr(file_mnt_user_ns(fp->filp), |
286 | fp->filp->f_path.dentry, | |
f4415848 NJ |
287 | fp->stream.name, |
288 | fp->stream.size, | |
289 | &stream_buf); | |
fd6de099 YY |
290 | if ((int)v_len <= 0) |
291 | return (int)v_len; | |
f4415848 | 292 | |
2ae1a6cc NJ |
293 | if (v_len <= *pos) { |
294 | count = -EINVAL; | |
295 | goto free_buf; | |
296 | } | |
297 | ||
298 | if (v_len - *pos < count) | |
299 | count = v_len - *pos; | |
300 | ||
f4415848 | 301 | memcpy(buf, &stream_buf[*pos], count); |
2ae1a6cc NJ |
302 | |
303 | free_buf: | |
673b9ba7 | 304 | kvfree(stream_buf); |
2ae1a6cc | 305 | return count; |
f4415848 NJ |
306 | } |
307 | ||
308 | /** | |
309 | * check_lock_range() - vfs helper for smb byte range file locking | |
310 | * @filp: the file to apply the lock to | |
311 | * @start: lock start byte offset | |
312 | * @end: lock end byte offset | |
313 | * @type: byte range type read/write | |
314 | * | |
315 | * Return: 0 on success, otherwise error | |
316 | */ | |
64b39f4a | 317 | static int check_lock_range(struct file *filp, loff_t start, loff_t end, |
070fb21e | 318 | unsigned char type) |
f4415848 NJ |
319 | { |
320 | struct file_lock *flock; | |
321 | struct file_lock_context *ctx = file_inode(filp)->i_flctx; | |
322 | int error = 0; | |
323 | ||
324 | if (!ctx || list_empty_careful(&ctx->flc_posix)) | |
325 | return 0; | |
326 | ||
327 | spin_lock(&ctx->flc_lock); | |
328 | list_for_each_entry(flock, &ctx->flc_posix, fl_list) { | |
329 | /* check conflict locks */ | |
330 | if (flock->fl_end >= start && end >= flock->fl_start) { | |
331 | if (flock->fl_type == F_RDLCK) { | |
332 | if (type == WRITE) { | |
bde1694a | 333 | pr_err("not allow write by shared lock\n"); |
f4415848 NJ |
334 | error = 1; |
335 | goto out; | |
336 | } | |
337 | } else if (flock->fl_type == F_WRLCK) { | |
338 | /* check owner in lock */ | |
339 | if (flock->fl_file != filp) { | |
340 | error = 1; | |
bde1694a | 341 | pr_err("not allow rw access by exclusive lock from other opens\n"); |
f4415848 NJ |
342 | goto out; |
343 | } | |
344 | } | |
345 | } | |
346 | } | |
347 | out: | |
348 | spin_unlock(&ctx->flc_lock); | |
349 | return error; | |
350 | } | |
351 | ||
352 | /** | |
353 | * ksmbd_vfs_read() - vfs helper for smb file read | |
354 | * @work: smb work | |
355 | * @fid: file id of open file | |
356 | * @count: read byte count | |
357 | * @pos: file pos | |
358 | * | |
359 | * Return: number of read bytes on success, otherwise error | |
360 | */ | |
64b39f4a | 361 | int ksmbd_vfs_read(struct ksmbd_work *work, struct ksmbd_file *fp, size_t count, |
070fb21e | 362 | loff_t *pos) |
f4415848 | 363 | { |
afa8f016 | 364 | struct file *filp = fp->filp; |
f4415848 | 365 | ssize_t nbytes = 0; |
afa8f016 NJ |
366 | char *rbuf = work->aux_payload_buf; |
367 | struct inode *inode = file_inode(filp); | |
f4415848 | 368 | |
f4415848 NJ |
369 | if (S_ISDIR(inode->i_mode)) |
370 | return -EISDIR; | |
371 | ||
372 | if (unlikely(count == 0)) | |
373 | return 0; | |
374 | ||
375 | if (work->conn->connection_type) { | |
376 | if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_EXECUTE_LE))) { | |
493fa2fb NJ |
377 | pr_err("no right to read(%pd)\n", |
378 | fp->filp->f_path.dentry); | |
f4415848 NJ |
379 | return -EACCES; |
380 | } | |
381 | } | |
382 | ||
383 | if (ksmbd_stream_fd(fp)) | |
384 | return ksmbd_vfs_stream_read(fp, rbuf, pos, count); | |
385 | ||
c36fca86 NJ |
386 | if (!work->tcon->posix_extensions) { |
387 | int ret; | |
388 | ||
070fb21e | 389 | ret = check_lock_range(filp, *pos, *pos + count - 1, READ); |
c36fca86 | 390 | if (ret) { |
bde1694a | 391 | pr_err("unable to read due to lock\n"); |
c36fca86 NJ |
392 | return -EAGAIN; |
393 | } | |
f4415848 NJ |
394 | } |
395 | ||
396 | nbytes = kernel_read(filp, rbuf, count, pos); | |
397 | if (nbytes < 0) { | |
bde1694a NJ |
398 | pr_err("smb read failed for (%s), err = %zd\n", |
399 | fp->filename, nbytes); | |
f4415848 NJ |
400 | return nbytes; |
401 | } | |
402 | ||
403 | filp->f_pos = *pos; | |
404 | return nbytes; | |
405 | } | |
406 | ||
407 | static int ksmbd_vfs_stream_write(struct ksmbd_file *fp, char *buf, loff_t *pos, | |
070fb21e | 408 | size_t count) |
f4415848 NJ |
409 | { |
410 | char *stream_buf = NULL, *wbuf; | |
465d7204 | 411 | struct user_namespace *user_ns = file_mnt_user_ns(fp->filp); |
f4415848 NJ |
412 | size_t size, v_len; |
413 | int err = 0; | |
414 | ||
415 | ksmbd_debug(VFS, "write stream data pos : %llu, count : %zd\n", | |
070fb21e | 416 | *pos, count); |
f4415848 NJ |
417 | |
418 | size = *pos + count; | |
419 | if (size > XATTR_SIZE_MAX) { | |
420 | size = XATTR_SIZE_MAX; | |
421 | count = (*pos + count) - XATTR_SIZE_MAX; | |
422 | } | |
423 | ||
465d7204 | 424 | v_len = ksmbd_vfs_getcasexattr(user_ns, |
af34983e | 425 | fp->filp->f_path.dentry, |
f4415848 NJ |
426 | fp->stream.name, |
427 | fp->stream.size, | |
428 | &stream_buf); | |
fd6de099 | 429 | if ((int)v_len < 0) { |
bde1694a | 430 | pr_err("not found stream in xattr : %zd\n", v_len); |
fd6de099 | 431 | err = (int)v_len; |
f4415848 NJ |
432 | goto out; |
433 | } | |
434 | ||
435 | if (v_len < size) { | |
79f6b11a | 436 | wbuf = kvmalloc(size, GFP_KERNEL | __GFP_ZERO); |
f4415848 NJ |
437 | if (!wbuf) { |
438 | err = -ENOMEM; | |
439 | goto out; | |
440 | } | |
441 | ||
442 | if (v_len > 0) | |
443 | memcpy(wbuf, stream_buf, v_len); | |
113ef68d | 444 | kvfree(stream_buf); |
f4415848 NJ |
445 | stream_buf = wbuf; |
446 | } | |
447 | ||
448 | memcpy(&stream_buf[*pos], buf, count); | |
449 | ||
465d7204 | 450 | err = ksmbd_vfs_setxattr(user_ns, |
af34983e | 451 | fp->filp->f_path.dentry, |
f4415848 NJ |
452 | fp->stream.name, |
453 | (void *)stream_buf, | |
454 | size, | |
455 | 0); | |
456 | if (err < 0) | |
457 | goto out; | |
458 | ||
459 | fp->filp->f_pos = *pos; | |
460 | err = 0; | |
461 | out: | |
79f6b11a | 462 | kvfree(stream_buf); |
f4415848 NJ |
463 | return err; |
464 | } | |
465 | ||
466 | /** | |
467 | * ksmbd_vfs_write() - vfs helper for smb file write | |
468 | * @work: work | |
469 | * @fid: file id of open file | |
470 | * @buf: buf containing data for writing | |
471 | * @count: read byte count | |
472 | * @pos: file pos | |
473 | * @sync: fsync after write | |
474 | * @written: number of bytes written | |
475 | * | |
476 | * Return: 0 on success, otherwise error | |
477 | */ | |
478 | int ksmbd_vfs_write(struct ksmbd_work *work, struct ksmbd_file *fp, | |
070fb21e NJ |
479 | char *buf, size_t count, loff_t *pos, bool sync, |
480 | ssize_t *written) | |
f4415848 NJ |
481 | { |
482 | struct ksmbd_session *sess = work->sess; | |
483 | struct file *filp; | |
484 | loff_t offset = *pos; | |
485 | int err = 0; | |
486 | ||
487 | if (sess->conn->connection_type) { | |
488 | if (!(fp->daccess & FILE_WRITE_DATA_LE)) { | |
493fa2fb NJ |
489 | pr_err("no right to write(%pd)\n", |
490 | fp->filp->f_path.dentry); | |
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) | |
493fa2fb NJ |
529 | pr_err("fsync failed for filename = %pd, err = %d\n", |
530 | fp->filp->f_path.dentry, 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 | */ | |
545 | int ksmbd_vfs_getattr(struct path *path, struct kstat *stat) | |
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 | |
581 | * @name: absolute directory or file name | |
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; |
a6a5fa77 | 591 | int flags = 0; |
f4415848 | 592 | |
f4415848 NJ |
593 | if (ksmbd_override_fsids(work)) |
594 | return -ENOMEM; | |
595 | ||
a6a5fa77 HL |
596 | if (test_share_config_flag(work->tcon->share_conf, |
597 | KSMBD_SHARE_FLAG_FOLLOW_SYMLINKS)) | |
598 | flags = LOOKUP_FOLLOW; | |
599 | ||
600 | err = kern_path(name, flags, &path); | |
f4415848 NJ |
601 | if (err) { |
602 | ksmbd_debug(VFS, "can't get %s, err %d\n", name, err); | |
603 | ksmbd_revert_fsids(work); | |
f4415848 NJ |
604 | return err; |
605 | } | |
606 | ||
da1e7ada | 607 | user_ns = mnt_user_ns(path.mnt); |
7c3d3e99 | 608 | parent = dget_parent(path.dentry); |
da1e7ada | 609 | err = ksmbd_vfs_lock_parent(user_ns, parent, path.dentry); |
333111a6 HL |
610 | if (err) { |
611 | dput(parent); | |
612 | path_put(&path); | |
613 | ksmbd_revert_fsids(work); | |
614 | return err; | |
f4415848 NJ |
615 | } |
616 | ||
333111a6 | 617 | if (!d_inode(path.dentry)->i_nlink) { |
f4415848 NJ |
618 | err = -ENOENT; |
619 | goto out_err; | |
620 | } | |
621 | ||
333111a6 | 622 | if (S_ISDIR(d_inode(path.dentry)->i_mode)) { |
da1e7ada | 623 | err = vfs_rmdir(user_ns, d_inode(parent), path.dentry); |
f4415848 NJ |
624 | if (err && err != -ENOTEMPTY) |
625 | ksmbd_debug(VFS, "%s: rmdir failed, err %d\n", name, | |
070fb21e | 626 | err); |
f4415848 | 627 | } else { |
da1e7ada | 628 | err = vfs_unlink(user_ns, d_inode(parent), path.dentry, NULL); |
f4415848 NJ |
629 | if (err) |
630 | ksmbd_debug(VFS, "%s: unlink failed, err %d\n", name, | |
070fb21e | 631 | err); |
f4415848 NJ |
632 | } |
633 | ||
f4415848 | 634 | out_err: |
7c3d3e99 NJ |
635 | inode_unlock(d_inode(parent)); |
636 | dput(parent); | |
637 | path_put(&path); | |
f4415848 NJ |
638 | ksmbd_revert_fsids(work); |
639 | return err; | |
640 | } | |
641 | ||
642 | /** | |
643 | * ksmbd_vfs_link() - vfs helper for creating smb hardlink | |
644 | * @oldname: source file name | |
645 | * @newname: hardlink name | |
646 | * | |
647 | * Return: 0 on success, otherwise error | |
648 | */ | |
64b39f4a | 649 | int ksmbd_vfs_link(struct ksmbd_work *work, const char *oldname, |
070fb21e | 650 | const char *newname) |
f4415848 NJ |
651 | { |
652 | struct path oldpath, newpath; | |
653 | struct dentry *dentry; | |
654 | int err; | |
a6a5fa77 | 655 | int flags = 0; |
f4415848 NJ |
656 | |
657 | if (ksmbd_override_fsids(work)) | |
658 | return -ENOMEM; | |
659 | ||
a6a5fa77 HL |
660 | if (test_share_config_flag(work->tcon->share_conf, |
661 | KSMBD_SHARE_FLAG_FOLLOW_SYMLINKS)) | |
662 | flags = LOOKUP_FOLLOW; | |
663 | ||
664 | err = kern_path(oldname, flags, &oldpath); | |
f4415848 | 665 | if (err) { |
bde1694a NJ |
666 | pr_err("cannot get linux path for %s, err = %d\n", |
667 | oldname, err); | |
f4415848 NJ |
668 | goto out1; |
669 | } | |
670 | ||
671 | dentry = kern_path_create(AT_FDCWD, newname, &newpath, | |
a6a5fa77 | 672 | flags | LOOKUP_REVAL); |
f4415848 NJ |
673 | if (IS_ERR(dentry)) { |
674 | err = PTR_ERR(dentry); | |
bde1694a | 675 | pr_err("path create err for %s, err %d\n", newname, err); |
f4415848 NJ |
676 | goto out2; |
677 | } | |
678 | ||
679 | err = -EXDEV; | |
680 | if (oldpath.mnt != newpath.mnt) { | |
bde1694a | 681 | pr_err("vfs_link failed err %d\n", err); |
f4415848 NJ |
682 | goto out3; |
683 | } | |
684 | ||
af34983e HL |
685 | err = vfs_link(oldpath.dentry, mnt_user_ns(newpath.mnt), |
686 | d_inode(newpath.dentry), | |
070fb21e | 687 | dentry, NULL); |
f4415848 NJ |
688 | if (err) |
689 | ksmbd_debug(VFS, "vfs_link failed err %d\n", err); | |
690 | ||
691 | out3: | |
692 | done_path_create(&newpath, dentry); | |
693 | out2: | |
694 | path_put(&oldpath); | |
695 | out1: | |
696 | ksmbd_revert_fsids(work); | |
697 | return err; | |
698 | } | |
699 | ||
4b637fc1 NJ |
700 | static int ksmbd_validate_entry_in_use(struct dentry *src_dent) |
701 | { | |
702 | struct dentry *dst_dent; | |
703 | ||
704 | spin_lock(&src_dent->d_lock); | |
705 | list_for_each_entry(dst_dent, &src_dent->d_subdirs, d_child) { | |
706 | struct ksmbd_file *child_fp; | |
707 | ||
708 | if (d_really_is_negative(dst_dent)) | |
709 | continue; | |
710 | ||
711 | child_fp = ksmbd_lookup_fd_inode(d_inode(dst_dent)); | |
712 | if (child_fp) { | |
713 | spin_unlock(&src_dent->d_lock); | |
714 | ksmbd_debug(VFS, "Forbid rename, sub file/dir is in use\n"); | |
715 | return -EACCES; | |
716 | } | |
717 | } | |
718 | spin_unlock(&src_dent->d_lock); | |
719 | ||
720 | return 0; | |
721 | } | |
722 | ||
f4415848 | 723 | static int __ksmbd_vfs_rename(struct ksmbd_work *work, |
af34983e | 724 | struct user_namespace *src_user_ns, |
070fb21e NJ |
725 | struct dentry *src_dent_parent, |
726 | struct dentry *src_dent, | |
af34983e | 727 | struct user_namespace *dst_user_ns, |
070fb21e NJ |
728 | struct dentry *dst_dent_parent, |
729 | struct dentry *trap_dent, | |
730 | char *dst_name) | |
f4415848 NJ |
731 | { |
732 | struct dentry *dst_dent; | |
733 | int err; | |
734 | ||
c36fca86 | 735 | if (!work->tcon->posix_extensions) { |
4b637fc1 NJ |
736 | err = ksmbd_validate_entry_in_use(src_dent); |
737 | if (err) | |
738 | return err; | |
f4415848 | 739 | } |
f4415848 NJ |
740 | |
741 | if (d_really_is_negative(src_dent_parent)) | |
742 | return -ENOENT; | |
743 | if (d_really_is_negative(dst_dent_parent)) | |
744 | return -ENOENT; | |
745 | if (d_really_is_negative(src_dent)) | |
746 | return -ENOENT; | |
747 | if (src_dent == trap_dent) | |
748 | return -EINVAL; | |
749 | ||
750 | if (ksmbd_override_fsids(work)) | |
751 | return -ENOMEM; | |
752 | ||
da1e7ada CB |
753 | dst_dent = lookup_one(dst_user_ns, dst_name, dst_dent_parent, |
754 | strlen(dst_name)); | |
f4415848 NJ |
755 | err = PTR_ERR(dst_dent); |
756 | if (IS_ERR(dst_dent)) { | |
bde1694a | 757 | pr_err("lookup failed %s [%d]\n", dst_name, err); |
f4415848 NJ |
758 | goto out; |
759 | } | |
760 | ||
761 | err = -ENOTEMPTY; | |
762 | if (dst_dent != trap_dent && !d_really_is_positive(dst_dent)) { | |
763 | struct renamedata rd = { | |
af34983e | 764 | .old_mnt_userns = src_user_ns, |
f4415848 NJ |
765 | .old_dir = d_inode(src_dent_parent), |
766 | .old_dentry = src_dent, | |
af34983e | 767 | .new_mnt_userns = dst_user_ns, |
f4415848 NJ |
768 | .new_dir = d_inode(dst_dent_parent), |
769 | .new_dentry = dst_dent, | |
770 | }; | |
771 | err = vfs_rename(&rd); | |
772 | } | |
773 | if (err) | |
bde1694a | 774 | pr_err("vfs_rename failed err %d\n", err); |
f4415848 NJ |
775 | if (dst_dent) |
776 | dput(dst_dent); | |
777 | out: | |
778 | ksmbd_revert_fsids(work); | |
779 | return err; | |
780 | } | |
781 | ||
782 | int ksmbd_vfs_fp_rename(struct ksmbd_work *work, struct ksmbd_file *fp, | |
070fb21e | 783 | char *newname) |
f4415848 | 784 | { |
da1e7ada | 785 | struct user_namespace *user_ns; |
f4415848 NJ |
786 | struct path dst_path; |
787 | struct dentry *src_dent_parent, *dst_dent_parent; | |
ff1d5727 | 788 | struct dentry *src_dent, *trap_dent, *src_child; |
f4415848 NJ |
789 | char *dst_name; |
790 | int err; | |
a6a5fa77 | 791 | int flags; |
f4415848 NJ |
792 | |
793 | dst_name = extract_last_component(newname); | |
794 | if (!dst_name) | |
795 | return -EINVAL; | |
796 | ||
797 | src_dent_parent = dget_parent(fp->filp->f_path.dentry); | |
f4415848 | 798 | src_dent = fp->filp->f_path.dentry; |
f4415848 | 799 | |
a6a5fa77 HL |
800 | flags = LOOKUP_DIRECTORY; |
801 | if (test_share_config_flag(work->tcon->share_conf, | |
802 | KSMBD_SHARE_FLAG_FOLLOW_SYMLINKS)) | |
803 | flags |= LOOKUP_FOLLOW; | |
804 | ||
805 | err = kern_path(newname, flags, &dst_path); | |
f4415848 NJ |
806 | if (err) { |
807 | ksmbd_debug(VFS, "Cannot get path for %s [%d]\n", newname, err); | |
808 | goto out; | |
809 | } | |
810 | dst_dent_parent = dst_path.dentry; | |
f4415848 NJ |
811 | |
812 | trap_dent = lock_rename(src_dent_parent, dst_dent_parent); | |
ff1d5727 NJ |
813 | dget(src_dent); |
814 | dget(dst_dent_parent); | |
da1e7ada CB |
815 | user_ns = file_mnt_user_ns(fp->filp); |
816 | src_child = lookup_one(user_ns, src_dent->d_name.name, src_dent_parent, | |
817 | src_dent->d_name.len); | |
ff1d5727 NJ |
818 | if (IS_ERR(src_child)) { |
819 | err = PTR_ERR(src_child); | |
820 | goto out_lock; | |
821 | } | |
822 | ||
823 | if (src_child != src_dent) { | |
824 | err = -ESTALE; | |
825 | dput(src_child); | |
826 | goto out_lock; | |
827 | } | |
828 | dput(src_child); | |
829 | ||
f4415848 | 830 | err = __ksmbd_vfs_rename(work, |
da1e7ada | 831 | user_ns, |
f4415848 NJ |
832 | src_dent_parent, |
833 | src_dent, | |
af34983e | 834 | mnt_user_ns(dst_path.mnt), |
f4415848 NJ |
835 | dst_dent_parent, |
836 | trap_dent, | |
837 | dst_name); | |
ff1d5727 NJ |
838 | out_lock: |
839 | dput(src_dent); | |
f4415848 | 840 | dput(dst_dent_parent); |
ff1d5727 | 841 | unlock_rename(src_dent_parent, dst_dent_parent); |
f4415848 NJ |
842 | path_put(&dst_path); |
843 | out: | |
f4415848 NJ |
844 | dput(src_dent_parent); |
845 | return err; | |
846 | } | |
847 | ||
848 | /** | |
849 | * ksmbd_vfs_truncate() - vfs helper for smb file truncate | |
850 | * @work: work | |
851 | * @name: old filename | |
852 | * @fid: file id of old file | |
853 | * @size: truncate to given size | |
854 | * | |
855 | * Return: 0 on success, otherwise error | |
856 | */ | |
857 | int ksmbd_vfs_truncate(struct ksmbd_work *work, const char *name, | |
070fb21e | 858 | struct ksmbd_file *fp, loff_t size) |
f4415848 NJ |
859 | { |
860 | struct path path; | |
861 | int err = 0; | |
f4415848 NJ |
862 | |
863 | if (name) { | |
864 | err = kern_path(name, 0, &path); | |
865 | if (err) { | |
bde1694a NJ |
866 | pr_err("cannot get linux path for %s, err %d\n", |
867 | name, err); | |
f4415848 NJ |
868 | return err; |
869 | } | |
870 | err = vfs_truncate(&path, size); | |
871 | if (err) | |
bde1694a NJ |
872 | pr_err("truncate failed for %s err %d\n", |
873 | name, err); | |
f4415848 NJ |
874 | path_put(&path); |
875 | } else { | |
876 | struct file *filp; | |
877 | ||
878 | filp = fp->filp; | |
879 | ||
880 | /* Do we need to break any of a levelII oplock? */ | |
881 | smb_break_all_levII_oplock(work, fp, 1); | |
882 | ||
c36fca86 NJ |
883 | if (!work->tcon->posix_extensions) { |
884 | struct inode *inode = file_inode(filp); | |
f4415848 | 885 | |
c36fca86 NJ |
886 | if (size < inode->i_size) { |
887 | err = check_lock_range(filp, size, | |
070fb21e | 888 | inode->i_size - 1, WRITE); |
c36fca86 NJ |
889 | } else { |
890 | err = check_lock_range(filp, inode->i_size, | |
070fb21e | 891 | size - 1, WRITE); |
c36fca86 NJ |
892 | } |
893 | ||
894 | if (err) { | |
bde1694a | 895 | pr_err("failed due to lock\n"); |
c36fca86 NJ |
896 | return -EAGAIN; |
897 | } | |
f4415848 NJ |
898 | } |
899 | ||
900 | err = vfs_truncate(&filp->f_path, size); | |
901 | if (err) | |
bde1694a NJ |
902 | pr_err("truncate failed for filename : %s err %d\n", |
903 | fp->filename, err); | |
f4415848 NJ |
904 | } |
905 | ||
906 | return err; | |
907 | } | |
908 | ||
909 | /** | |
910 | * ksmbd_vfs_listxattr() - vfs helper for smb list extended attributes | |
911 | * @dentry: dentry of file for listing xattrs | |
912 | * @list: destination buffer | |
913 | * @size: destination buffer length | |
914 | * | |
915 | * Return: xattr list length on success, otherwise error | |
916 | */ | |
917 | ssize_t ksmbd_vfs_listxattr(struct dentry *dentry, char **list) | |
918 | { | |
919 | ssize_t size; | |
920 | char *vlist = NULL; | |
921 | ||
922 | size = vfs_listxattr(dentry, NULL, 0); | |
923 | if (size <= 0) | |
924 | return size; | |
925 | ||
79f6b11a | 926 | vlist = kvmalloc(size, GFP_KERNEL | __GFP_ZERO); |
f4415848 NJ |
927 | if (!vlist) |
928 | return -ENOMEM; | |
929 | ||
930 | *list = vlist; | |
931 | size = vfs_listxattr(dentry, vlist, size); | |
932 | if (size < 0) { | |
933 | ksmbd_debug(VFS, "listxattr failed\n"); | |
79f6b11a | 934 | kvfree(vlist); |
f4415848 NJ |
935 | *list = NULL; |
936 | } | |
937 | ||
938 | return size; | |
939 | } | |
940 | ||
af34983e HL |
941 | static ssize_t ksmbd_vfs_xattr_len(struct user_namespace *user_ns, |
942 | struct dentry *dentry, char *xattr_name) | |
f4415848 | 943 | { |
af34983e | 944 | return vfs_getxattr(user_ns, dentry, xattr_name, NULL, 0); |
f4415848 NJ |
945 | } |
946 | ||
947 | /** | |
948 | * ksmbd_vfs_getxattr() - vfs helper for smb get extended attributes value | |
af34983e | 949 | * @user_ns: user namespace |
f4415848 NJ |
950 | * @dentry: dentry of file for getting xattrs |
951 | * @xattr_name: name of xattr name to query | |
952 | * @xattr_buf: destination buffer xattr value | |
953 | * | |
954 | * Return: read xattr value length on success, otherwise error | |
955 | */ | |
af34983e HL |
956 | ssize_t ksmbd_vfs_getxattr(struct user_namespace *user_ns, |
957 | struct dentry *dentry, | |
958 | char *xattr_name, char **xattr_buf) | |
f4415848 NJ |
959 | { |
960 | ssize_t xattr_len; | |
961 | char *buf; | |
962 | ||
963 | *xattr_buf = NULL; | |
af34983e | 964 | xattr_len = ksmbd_vfs_xattr_len(user_ns, dentry, xattr_name); |
f4415848 NJ |
965 | if (xattr_len < 0) |
966 | return xattr_len; | |
967 | ||
968 | buf = kmalloc(xattr_len + 1, GFP_KERNEL); | |
969 | if (!buf) | |
970 | return -ENOMEM; | |
971 | ||
af34983e | 972 | xattr_len = vfs_getxattr(user_ns, dentry, xattr_name, |
d7e5852b | 973 | (void *)buf, xattr_len); |
f4415848 NJ |
974 | if (xattr_len > 0) |
975 | *xattr_buf = buf; | |
976 | else | |
977 | kfree(buf); | |
978 | return xattr_len; | |
979 | } | |
980 | ||
981 | /** | |
982 | * ksmbd_vfs_setxattr() - vfs helper for smb set extended attributes value | |
af34983e | 983 | * @user_ns: user namespace |
f4415848 NJ |
984 | * @dentry: dentry to set XATTR at |
985 | * @name: xattr name for setxattr | |
986 | * @value: xattr value to set | |
987 | * @size: size of xattr value | |
988 | * @flags: destination buffer length | |
989 | * | |
990 | * Return: 0 on success, otherwise error | |
991 | */ | |
af34983e HL |
992 | int ksmbd_vfs_setxattr(struct user_namespace *user_ns, |
993 | struct dentry *dentry, const char *attr_name, | |
070fb21e | 994 | const void *attr_value, size_t attr_size, int flags) |
f4415848 NJ |
995 | { |
996 | int err; | |
997 | ||
af34983e HL |
998 | err = vfs_setxattr(user_ns, |
999 | dentry, | |
f4415848 NJ |
1000 | attr_name, |
1001 | attr_value, | |
1002 | attr_size, | |
1003 | flags); | |
1004 | if (err) | |
1005 | ksmbd_debug(VFS, "setxattr failed, err %d\n", err); | |
1006 | return err; | |
1007 | } | |
1008 | ||
1009 | /** | |
1010 | * ksmbd_vfs_set_fadvise() - convert smb IO caching options to linux options | |
1011 | * @filp: file pointer for IO | |
1012 | * @options: smb IO options | |
1013 | */ | |
1014 | void ksmbd_vfs_set_fadvise(struct file *filp, __le32 option) | |
1015 | { | |
1016 | struct address_space *mapping; | |
1017 | ||
1018 | mapping = filp->f_mapping; | |
1019 | ||
1020 | if (!option || !mapping) | |
1021 | return; | |
1022 | ||
64b39f4a | 1023 | if (option & FILE_WRITE_THROUGH_LE) { |
f4415848 | 1024 | filp->f_flags |= O_SYNC; |
64b39f4a | 1025 | } else if (option & FILE_SEQUENTIAL_ONLY_LE) { |
f4415848 NJ |
1026 | filp->f_ra.ra_pages = inode_to_bdi(mapping->host)->ra_pages * 2; |
1027 | spin_lock(&filp->f_lock); | |
1028 | filp->f_mode &= ~FMODE_RANDOM; | |
1029 | spin_unlock(&filp->f_lock); | |
1030 | } else if (option & FILE_RANDOM_ACCESS_LE) { | |
1031 | spin_lock(&filp->f_lock); | |
1032 | filp->f_mode |= FMODE_RANDOM; | |
1033 | spin_unlock(&filp->f_lock); | |
1034 | } | |
1035 | } | |
1036 | ||
64b39f4a | 1037 | int ksmbd_vfs_zero_data(struct ksmbd_work *work, struct ksmbd_file *fp, |
070fb21e | 1038 | loff_t off, loff_t len) |
f4415848 NJ |
1039 | { |
1040 | smb_break_all_levII_oplock(work, fp, 1); | |
1041 | if (fp->f_ci->m_fattr & ATTR_SPARSE_FILE_LE) | |
1042 | return vfs_fallocate(fp->filp, | |
070fb21e NJ |
1043 | FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, |
1044 | off, len); | |
f4415848 NJ |
1045 | |
1046 | return vfs_fallocate(fp->filp, FALLOC_FL_ZERO_RANGE, off, len); | |
1047 | } | |
1048 | ||
1049 | int ksmbd_vfs_fqar_lseek(struct ksmbd_file *fp, loff_t start, loff_t length, | |
070fb21e NJ |
1050 | struct file_allocated_range_buffer *ranges, |
1051 | int in_count, int *out_count) | |
f4415848 NJ |
1052 | { |
1053 | struct file *f = fp->filp; | |
ab0b263b | 1054 | struct inode *inode = file_inode(fp->filp); |
f4415848 NJ |
1055 | loff_t maxbytes = (u64)inode->i_sb->s_maxbytes, end; |
1056 | loff_t extent_start, extent_end; | |
1057 | int ret = 0; | |
1058 | ||
1059 | if (start > maxbytes) | |
1060 | return -EFBIG; | |
1061 | ||
1062 | if (!in_count) | |
1063 | return 0; | |
1064 | ||
1065 | /* | |
1066 | * Shrink request scope to what the fs can actually handle. | |
1067 | */ | |
1068 | if (length > maxbytes || (maxbytes - length) < start) | |
1069 | length = maxbytes - start; | |
1070 | ||
1071 | if (start + length > inode->i_size) | |
1072 | length = inode->i_size - start; | |
1073 | ||
1074 | *out_count = 0; | |
1075 | end = start + length; | |
1076 | while (start < end && *out_count < in_count) { | |
1077 | extent_start = f->f_op->llseek(f, start, SEEK_DATA); | |
1078 | if (extent_start < 0) { | |
1079 | if (extent_start != -ENXIO) | |
1080 | ret = (int)extent_start; | |
1081 | break; | |
1082 | } | |
1083 | ||
1084 | if (extent_start >= end) | |
1085 | break; | |
1086 | ||
1087 | extent_end = f->f_op->llseek(f, extent_start, SEEK_HOLE); | |
1088 | if (extent_end < 0) { | |
1089 | if (extent_end != -ENXIO) | |
1090 | ret = (int)extent_end; | |
1091 | break; | |
64b39f4a | 1092 | } else if (extent_start >= extent_end) { |
f4415848 | 1093 | break; |
64b39f4a | 1094 | } |
f4415848 NJ |
1095 | |
1096 | ranges[*out_count].file_offset = cpu_to_le64(extent_start); | |
1097 | ranges[(*out_count)++].length = | |
1098 | cpu_to_le64(min(extent_end, end) - extent_start); | |
1099 | ||
1100 | start = extent_end; | |
1101 | } | |
1102 | ||
1103 | return ret; | |
1104 | } | |
1105 | ||
af34983e HL |
1106 | int ksmbd_vfs_remove_xattr(struct user_namespace *user_ns, |
1107 | struct dentry *dentry, char *attr_name) | |
f4415848 | 1108 | { |
af34983e | 1109 | return vfs_removexattr(user_ns, dentry, attr_name); |
f4415848 NJ |
1110 | } |
1111 | ||
af34983e HL |
1112 | int ksmbd_vfs_unlink(struct user_namespace *user_ns, |
1113 | struct dentry *dir, struct dentry *dentry) | |
f4415848 NJ |
1114 | { |
1115 | int err = 0; | |
1116 | ||
da1e7ada | 1117 | err = ksmbd_vfs_lock_parent(user_ns, dir, dentry); |
333111a6 HL |
1118 | if (err) |
1119 | return err; | |
ff1d5727 | 1120 | dget(dentry); |
f4415848 NJ |
1121 | |
1122 | if (S_ISDIR(d_inode(dentry)->i_mode)) | |
af34983e | 1123 | err = vfs_rmdir(user_ns, d_inode(dir), dentry); |
f4415848 | 1124 | else |
af34983e | 1125 | err = vfs_unlink(user_ns, d_inode(dir), dentry, NULL); |
f4415848 | 1126 | |
f4415848 | 1127 | dput(dentry); |
ff1d5727 | 1128 | inode_unlock(d_inode(dir)); |
f4415848 NJ |
1129 | if (err) |
1130 | ksmbd_debug(VFS, "failed to delete, err %d\n", err); | |
1131 | ||
1132 | return err; | |
1133 | } | |
1134 | ||
64b39f4a | 1135 | static int __dir_empty(struct dir_context *ctx, const char *name, int namlen, |
070fb21e | 1136 | loff_t offset, u64 ino, unsigned int d_type) |
f4415848 NJ |
1137 | { |
1138 | struct ksmbd_readdir_data *buf; | |
1139 | ||
1140 | buf = container_of(ctx, struct ksmbd_readdir_data, ctx); | |
1141 | buf->dirent_count++; | |
1142 | ||
1143 | if (buf->dirent_count > 2) | |
1144 | return -ENOTEMPTY; | |
1145 | return 0; | |
1146 | } | |
1147 | ||
1148 | /** | |
1149 | * ksmbd_vfs_empty_dir() - check for empty directory | |
1150 | * @fp: ksmbd file pointer | |
1151 | * | |
1152 | * Return: true if directory empty, otherwise false | |
1153 | */ | |
1154 | int ksmbd_vfs_empty_dir(struct ksmbd_file *fp) | |
1155 | { | |
1156 | int err; | |
1157 | struct ksmbd_readdir_data readdir_data; | |
1158 | ||
1159 | memset(&readdir_data, 0, sizeof(struct ksmbd_readdir_data)); | |
1160 | ||
1161 | set_ctx_actor(&readdir_data.ctx, __dir_empty); | |
1162 | readdir_data.dirent_count = 0; | |
1163 | ||
e8c06191 | 1164 | err = iterate_dir(fp->filp, &readdir_data.ctx); |
f4415848 NJ |
1165 | if (readdir_data.dirent_count > 2) |
1166 | err = -ENOTEMPTY; | |
1167 | else | |
1168 | err = 0; | |
1169 | return err; | |
1170 | } | |
1171 | ||
64b39f4a | 1172 | static int __caseless_lookup(struct dir_context *ctx, const char *name, |
070fb21e NJ |
1173 | int namlen, loff_t offset, u64 ino, |
1174 | unsigned int d_type) | |
f4415848 NJ |
1175 | { |
1176 | struct ksmbd_readdir_data *buf; | |
1177 | ||
1178 | buf = container_of(ctx, struct ksmbd_readdir_data, ctx); | |
1179 | ||
1180 | if (buf->used != namlen) | |
1181 | return 0; | |
1182 | if (!strncasecmp((char *)buf->private, name, namlen)) { | |
1183 | memcpy((char *)buf->private, name, namlen); | |
1184 | buf->dirent_count = 1; | |
1185 | return -EEXIST; | |
1186 | } | |
1187 | return 0; | |
1188 | } | |
1189 | ||
1190 | /** | |
1191 | * ksmbd_vfs_lookup_in_dir() - lookup a file in a directory | |
3c203783 HL |
1192 | * @dir: path info |
1193 | * @name: filename to lookup | |
1194 | * @namelen: filename length | |
f4415848 NJ |
1195 | * |
1196 | * Return: 0 on success, otherwise error | |
1197 | */ | |
3c203783 | 1198 | static int ksmbd_vfs_lookup_in_dir(struct path *dir, char *name, size_t namelen) |
f4415848 | 1199 | { |
f4415848 NJ |
1200 | int ret; |
1201 | struct file *dfilp; | |
64b39f4a | 1202 | int flags = O_RDONLY | O_LARGEFILE; |
f4415848 NJ |
1203 | struct ksmbd_readdir_data readdir_data = { |
1204 | .ctx.actor = __caseless_lookup, | |
3c203783 HL |
1205 | .private = name, |
1206 | .used = namelen, | |
1207 | .dirent_count = 0, | |
f4415848 NJ |
1208 | }; |
1209 | ||
3c203783 HL |
1210 | dfilp = dentry_open(dir, flags, current_cred()); |
1211 | if (IS_ERR(dfilp)) | |
1212 | return PTR_ERR(dfilp); | |
f4415848 | 1213 | |
e8c06191 | 1214 | ret = iterate_dir(dfilp, &readdir_data.ctx); |
f4415848 NJ |
1215 | if (readdir_data.dirent_count > 0) |
1216 | ret = 0; | |
f4415848 | 1217 | fput(dfilp); |
f4415848 NJ |
1218 | return ret; |
1219 | } | |
1220 | ||
1221 | /** | |
1222 | * ksmbd_vfs_kern_path() - lookup a file and get path info | |
1223 | * @name: name of file for lookup | |
1224 | * @flags: lookup flags | |
1225 | * @path: if lookup succeed, return path info | |
1226 | * @caseless: caseless filename lookup | |
1227 | * | |
1228 | * Return: 0 on success, otherwise error | |
1229 | */ | |
1230 | int ksmbd_vfs_kern_path(char *name, unsigned int flags, struct path *path, | |
070fb21e | 1231 | bool caseless) |
f4415848 | 1232 | { |
f4415848 NJ |
1233 | int err; |
1234 | ||
3c203783 HL |
1235 | if (name[0] != '/') |
1236 | return -EINVAL; | |
1237 | ||
f4415848 NJ |
1238 | err = kern_path(name, flags, path); |
1239 | if (!err) | |
3c203783 | 1240 | return 0; |
f4415848 NJ |
1241 | |
1242 | if (caseless) { | |
3c203783 HL |
1243 | char *filepath; |
1244 | struct path parent; | |
1245 | size_t path_len, remain_len; | |
f4415848 | 1246 | |
3c203783 HL |
1247 | filepath = kstrdup(name, GFP_KERNEL); |
1248 | if (!filepath) | |
1249 | return -ENOMEM; | |
1250 | ||
1251 | path_len = strlen(filepath); | |
1252 | remain_len = path_len - 1; | |
f4415848 | 1253 | |
3c203783 | 1254 | err = kern_path("/", flags, &parent); |
f4415848 NJ |
1255 | if (err) |
1256 | goto out; | |
f4415848 | 1257 | |
3c203783 HL |
1258 | while (d_can_lookup(parent.dentry)) { |
1259 | char *filename = filepath + path_len - remain_len; | |
1260 | char *next = strchrnul(filename, '/'); | |
1261 | size_t filename_len = next - filename; | |
1262 | bool is_last = !next[0]; | |
1263 | ||
1264 | if (filename_len == 0) | |
1265 | break; | |
1266 | ||
1267 | err = ksmbd_vfs_lookup_in_dir(&parent, filename, | |
1268 | filename_len); | |
1269 | if (err) { | |
1270 | path_put(&parent); | |
1271 | goto out; | |
1272 | } | |
1273 | ||
1274 | path_put(&parent); | |
1275 | next[0] = '\0'; | |
1276 | ||
1277 | err = kern_path(filepath, flags, &parent); | |
1278 | if (err) | |
1279 | goto out; | |
1280 | ||
1281 | if (is_last) { | |
1282 | path->mnt = parent.mnt; | |
1283 | path->dentry = parent.dentry; | |
1284 | goto out; | |
1285 | } | |
1286 | ||
1287 | next[0] = '/'; | |
1288 | remain_len -= filename_len + 1; | |
1289 | } | |
1290 | ||
1291 | path_put(&parent); | |
1292 | err = -EINVAL; | |
f4415848 | 1293 | out: |
3c203783 HL |
1294 | kfree(filepath); |
1295 | } | |
f4415848 NJ |
1296 | return err; |
1297 | } | |
1298 | ||
af34983e HL |
1299 | int ksmbd_vfs_remove_acl_xattrs(struct user_namespace *user_ns, |
1300 | struct dentry *dentry) | |
f4415848 NJ |
1301 | { |
1302 | char *name, *xattr_list = NULL; | |
1303 | ssize_t xattr_list_len; | |
1304 | int err = 0; | |
1305 | ||
1306 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
1307 | if (xattr_list_len < 0) { | |
1308 | goto out; | |
1309 | } else if (!xattr_list_len) { | |
1310 | ksmbd_debug(SMB, "empty xattr in the file\n"); | |
1311 | goto out; | |
1312 | } | |
1313 | ||
1314 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
070fb21e | 1315 | name += strlen(name) + 1) { |
f4415848 NJ |
1316 | ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name)); |
1317 | ||
1318 | if (!strncmp(name, XATTR_NAME_POSIX_ACL_ACCESS, | |
64b39f4a | 1319 | sizeof(XATTR_NAME_POSIX_ACL_ACCESS) - 1) || |
f4415848 | 1320 | !strncmp(name, XATTR_NAME_POSIX_ACL_DEFAULT, |
64b39f4a | 1321 | sizeof(XATTR_NAME_POSIX_ACL_DEFAULT) - 1)) { |
af34983e | 1322 | err = ksmbd_vfs_remove_xattr(user_ns, dentry, name); |
f4415848 NJ |
1323 | if (err) |
1324 | ksmbd_debug(SMB, | |
070fb21e | 1325 | "remove acl xattr failed : %s\n", name); |
f4415848 NJ |
1326 | } |
1327 | } | |
1328 | out: | |
79f6b11a | 1329 | kvfree(xattr_list); |
f4415848 NJ |
1330 | return err; |
1331 | } | |
1332 | ||
af34983e HL |
1333 | int ksmbd_vfs_remove_sd_xattrs(struct user_namespace *user_ns, |
1334 | struct dentry *dentry) | |
f4415848 NJ |
1335 | { |
1336 | char *name, *xattr_list = NULL; | |
1337 | ssize_t xattr_list_len; | |
1338 | int err = 0; | |
1339 | ||
1340 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
1341 | if (xattr_list_len < 0) { | |
1342 | goto out; | |
1343 | } else if (!xattr_list_len) { | |
1344 | ksmbd_debug(SMB, "empty xattr in the file\n"); | |
1345 | goto out; | |
1346 | } | |
1347 | ||
1348 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
1349 | name += strlen(name) + 1) { | |
1350 | ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name)); | |
1351 | ||
1352 | if (!strncmp(name, XATTR_NAME_SD, XATTR_NAME_SD_LEN)) { | |
af34983e | 1353 | err = ksmbd_vfs_remove_xattr(user_ns, dentry, name); |
f4415848 NJ |
1354 | if (err) |
1355 | ksmbd_debug(SMB, "remove xattr failed : %s\n", name); | |
1356 | } | |
1357 | } | |
1358 | out: | |
79f6b11a | 1359 | kvfree(xattr_list); |
f4415848 NJ |
1360 | return err; |
1361 | } | |
1362 | ||
af34983e HL |
1363 | static struct xattr_smb_acl *ksmbd_vfs_make_xattr_posix_acl(struct user_namespace *user_ns, |
1364 | struct inode *inode, | |
070fb21e | 1365 | int acl_type) |
f4415848 NJ |
1366 | { |
1367 | struct xattr_smb_acl *smb_acl = NULL; | |
1368 | struct posix_acl *posix_acls; | |
1369 | struct posix_acl_entry *pa_entry; | |
1370 | struct xattr_acl_entry *xa_entry; | |
1371 | int i; | |
1372 | ||
777cad16 NJ |
1373 | if (!IS_ENABLED(CONFIG_FS_POSIX_ACL)) |
1374 | return NULL; | |
1375 | ||
67d1c432 | 1376 | posix_acls = get_acl(inode, acl_type); |
f4415848 NJ |
1377 | if (!posix_acls) |
1378 | return NULL; | |
1379 | ||
1380 | smb_acl = kzalloc(sizeof(struct xattr_smb_acl) + | |
1381 | sizeof(struct xattr_acl_entry) * posix_acls->a_count, | |
1382 | GFP_KERNEL); | |
1383 | if (!smb_acl) | |
1384 | goto out; | |
1385 | ||
1386 | smb_acl->count = posix_acls->a_count; | |
1387 | pa_entry = posix_acls->a_entries; | |
1388 | xa_entry = smb_acl->entries; | |
1389 | for (i = 0; i < posix_acls->a_count; i++, pa_entry++, xa_entry++) { | |
1390 | switch (pa_entry->e_tag) { | |
1391 | case ACL_USER: | |
1392 | xa_entry->type = SMB_ACL_USER; | |
0e844efe | 1393 | xa_entry->uid = posix_acl_uid_translate(user_ns, pa_entry); |
f4415848 NJ |
1394 | break; |
1395 | case ACL_USER_OBJ: | |
1396 | xa_entry->type = SMB_ACL_USER_OBJ; | |
1397 | break; | |
1398 | case ACL_GROUP: | |
1399 | xa_entry->type = SMB_ACL_GROUP; | |
0e844efe | 1400 | xa_entry->gid = posix_acl_gid_translate(user_ns, pa_entry); |
f4415848 NJ |
1401 | break; |
1402 | case ACL_GROUP_OBJ: | |
1403 | xa_entry->type = SMB_ACL_GROUP_OBJ; | |
1404 | break; | |
1405 | case ACL_OTHER: | |
1406 | xa_entry->type = SMB_ACL_OTHER; | |
1407 | break; | |
1408 | case ACL_MASK: | |
1409 | xa_entry->type = SMB_ACL_MASK; | |
1410 | break; | |
1411 | default: | |
bde1694a | 1412 | pr_err("unknown type : 0x%x\n", pa_entry->e_tag); |
f4415848 NJ |
1413 | goto out; |
1414 | } | |
1415 | ||
1416 | if (pa_entry->e_perm & ACL_READ) | |
1417 | xa_entry->perm |= SMB_ACL_READ; | |
1418 | if (pa_entry->e_perm & ACL_WRITE) | |
1419 | xa_entry->perm |= SMB_ACL_WRITE; | |
1420 | if (pa_entry->e_perm & ACL_EXECUTE) | |
1421 | xa_entry->perm |= SMB_ACL_EXECUTE; | |
1422 | } | |
1423 | out: | |
1424 | posix_acl_release(posix_acls); | |
1425 | return smb_acl; | |
1426 | } | |
1427 | ||
af34983e HL |
1428 | int ksmbd_vfs_set_sd_xattr(struct ksmbd_conn *conn, |
1429 | struct user_namespace *user_ns, | |
1430 | struct dentry *dentry, | |
070fb21e | 1431 | struct smb_ntsd *pntsd, int len) |
f4415848 NJ |
1432 | { |
1433 | int rc; | |
1434 | struct ndr sd_ndr = {0}, acl_ndr = {0}; | |
1435 | struct xattr_ntacl acl = {0}; | |
1436 | struct xattr_smb_acl *smb_acl, *def_smb_acl = NULL; | |
fba08fa0 | 1437 | struct inode *inode = d_inode(dentry); |
f4415848 NJ |
1438 | |
1439 | acl.version = 4; | |
1440 | acl.hash_type = XATTR_SD_HASH_TYPE_SHA256; | |
fba08fa0 | 1441 | acl.current_time = ksmbd_UnixTimeToNT(current_time(inode)); |
f4415848 NJ |
1442 | |
1443 | memcpy(acl.desc, "posix_acl", 9); | |
1444 | acl.desc_len = 10; | |
1445 | ||
1446 | pntsd->osidoffset = | |
1447 | cpu_to_le32(le32_to_cpu(pntsd->osidoffset) + NDR_NTSD_OFFSETOF); | |
1448 | pntsd->gsidoffset = | |
1449 | cpu_to_le32(le32_to_cpu(pntsd->gsidoffset) + NDR_NTSD_OFFSETOF); | |
1450 | pntsd->dacloffset = | |
1451 | cpu_to_le32(le32_to_cpu(pntsd->dacloffset) + NDR_NTSD_OFFSETOF); | |
1452 | ||
1453 | acl.sd_buf = (char *)pntsd; | |
1454 | acl.sd_size = len; | |
1455 | ||
1456 | rc = ksmbd_gen_sd_hash(conn, acl.sd_buf, acl.sd_size, acl.hash); | |
1457 | if (rc) { | |
bde1694a | 1458 | pr_err("failed to generate hash for ndr acl\n"); |
f4415848 NJ |
1459 | return rc; |
1460 | } | |
1461 | ||
af34983e HL |
1462 | smb_acl = ksmbd_vfs_make_xattr_posix_acl(user_ns, inode, |
1463 | ACL_TYPE_ACCESS); | |
f4415848 | 1464 | if (S_ISDIR(inode->i_mode)) |
af34983e | 1465 | def_smb_acl = ksmbd_vfs_make_xattr_posix_acl(user_ns, inode, |
070fb21e | 1466 | ACL_TYPE_DEFAULT); |
f4415848 | 1467 | |
af34983e HL |
1468 | rc = ndr_encode_posix_acl(&acl_ndr, user_ns, inode, |
1469 | smb_acl, def_smb_acl); | |
f4415848 | 1470 | if (rc) { |
bde1694a | 1471 | pr_err("failed to encode ndr to posix acl\n"); |
f4415848 NJ |
1472 | goto out; |
1473 | } | |
1474 | ||
1475 | rc = ksmbd_gen_sd_hash(conn, acl_ndr.data, acl_ndr.offset, | |
070fb21e | 1476 | acl.posix_acl_hash); |
f4415848 | 1477 | if (rc) { |
bde1694a | 1478 | pr_err("failed to generate hash for ndr acl\n"); |
f4415848 NJ |
1479 | goto out; |
1480 | } | |
1481 | ||
1482 | rc = ndr_encode_v4_ntacl(&sd_ndr, &acl); | |
1483 | if (rc) { | |
bde1694a | 1484 | pr_err("failed to encode ndr to posix acl\n"); |
f4415848 NJ |
1485 | goto out; |
1486 | } | |
1487 | ||
af34983e HL |
1488 | rc = ksmbd_vfs_setxattr(user_ns, dentry, |
1489 | XATTR_NAME_SD, sd_ndr.data, | |
070fb21e | 1490 | sd_ndr.offset, 0); |
f4415848 | 1491 | if (rc < 0) |
bde1694a | 1492 | pr_err("Failed to store XATTR ntacl :%d\n", rc); |
f4415848 NJ |
1493 | |
1494 | kfree(sd_ndr.data); | |
1495 | out: | |
1496 | kfree(acl_ndr.data); | |
1497 | kfree(smb_acl); | |
1498 | kfree(def_smb_acl); | |
1499 | return rc; | |
1500 | } | |
1501 | ||
af34983e HL |
1502 | int ksmbd_vfs_get_sd_xattr(struct ksmbd_conn *conn, |
1503 | struct user_namespace *user_ns, | |
1504 | struct dentry *dentry, | |
070fb21e | 1505 | struct smb_ntsd **pntsd) |
f4415848 NJ |
1506 | { |
1507 | int rc; | |
1508 | struct ndr n; | |
78ad2c27 NJ |
1509 | struct inode *inode = d_inode(dentry); |
1510 | struct ndr acl_ndr = {0}; | |
1511 | struct xattr_ntacl acl; | |
1512 | struct xattr_smb_acl *smb_acl = NULL, *def_smb_acl = NULL; | |
1513 | __u8 cmp_hash[XATTR_SD_HASH_SIZE] = {0}; | |
f4415848 | 1514 | |
af34983e | 1515 | rc = ksmbd_vfs_getxattr(user_ns, dentry, XATTR_NAME_SD, &n.data); |
78ad2c27 NJ |
1516 | if (rc <= 0) |
1517 | return rc; | |
f4415848 | 1518 | |
78ad2c27 NJ |
1519 | n.length = rc; |
1520 | rc = ndr_decode_v4_ntacl(&n, &acl); | |
1521 | if (rc) | |
1522 | goto free_n_data; | |
f4415848 | 1523 | |
78ad2c27 NJ |
1524 | smb_acl = ksmbd_vfs_make_xattr_posix_acl(user_ns, inode, |
1525 | ACL_TYPE_ACCESS); | |
1526 | if (S_ISDIR(inode->i_mode)) | |
1527 | def_smb_acl = ksmbd_vfs_make_xattr_posix_acl(user_ns, inode, | |
1528 | ACL_TYPE_DEFAULT); | |
f4415848 | 1529 | |
78ad2c27 NJ |
1530 | rc = ndr_encode_posix_acl(&acl_ndr, user_ns, inode, smb_acl, |
1531 | def_smb_acl); | |
1532 | if (rc) { | |
1533 | pr_err("failed to encode ndr to posix acl\n"); | |
1534 | goto out_free; | |
1535 | } | |
f4415848 | 1536 | |
78ad2c27 NJ |
1537 | rc = ksmbd_gen_sd_hash(conn, acl_ndr.data, acl_ndr.offset, cmp_hash); |
1538 | if (rc) { | |
1539 | pr_err("failed to generate hash for ndr acl\n"); | |
1540 | goto out_free; | |
1541 | } | |
1542 | ||
1543 | if (memcmp(cmp_hash, acl.posix_acl_hash, XATTR_SD_HASH_SIZE)) { | |
1544 | pr_err("hash value diff\n"); | |
1545 | rc = -EINVAL; | |
1546 | goto out_free; | |
1547 | } | |
1548 | ||
1549 | *pntsd = acl.sd_buf; | |
1550 | (*pntsd)->osidoffset = cpu_to_le32(le32_to_cpu((*pntsd)->osidoffset) - | |
1551 | NDR_NTSD_OFFSETOF); | |
1552 | (*pntsd)->gsidoffset = cpu_to_le32(le32_to_cpu((*pntsd)->gsidoffset) - | |
1553 | NDR_NTSD_OFFSETOF); | |
1554 | (*pntsd)->dacloffset = cpu_to_le32(le32_to_cpu((*pntsd)->dacloffset) - | |
1555 | NDR_NTSD_OFFSETOF); | |
1556 | ||
1557 | rc = acl.sd_size; | |
1558 | out_free: | |
1559 | kfree(acl_ndr.data); | |
1560 | kfree(smb_acl); | |
1561 | kfree(def_smb_acl); | |
1562 | if (rc < 0) { | |
1563 | kfree(acl.sd_buf); | |
1564 | *pntsd = NULL; | |
f4415848 NJ |
1565 | } |
1566 | ||
78ad2c27 NJ |
1567 | free_n_data: |
1568 | kfree(n.data); | |
f4415848 NJ |
1569 | return rc; |
1570 | } | |
1571 | ||
af34983e HL |
1572 | int ksmbd_vfs_set_dos_attrib_xattr(struct user_namespace *user_ns, |
1573 | struct dentry *dentry, | |
070fb21e | 1574 | struct xattr_dos_attrib *da) |
f4415848 NJ |
1575 | { |
1576 | struct ndr n; | |
1577 | int err; | |
1578 | ||
1579 | err = ndr_encode_dos_attr(&n, da); | |
1580 | if (err) | |
1581 | return err; | |
1582 | ||
af34983e | 1583 | err = ksmbd_vfs_setxattr(user_ns, dentry, XATTR_NAME_DOS_ATTRIBUTE, |
070fb21e | 1584 | (void *)n.data, n.offset, 0); |
f4415848 NJ |
1585 | if (err) |
1586 | ksmbd_debug(SMB, "failed to store dos attribute in xattr\n"); | |
1587 | kfree(n.data); | |
1588 | ||
1589 | return err; | |
1590 | } | |
1591 | ||
af34983e HL |
1592 | int ksmbd_vfs_get_dos_attrib_xattr(struct user_namespace *user_ns, |
1593 | struct dentry *dentry, | |
070fb21e | 1594 | struct xattr_dos_attrib *da) |
f4415848 NJ |
1595 | { |
1596 | struct ndr n; | |
1597 | int err; | |
1598 | ||
af34983e | 1599 | err = ksmbd_vfs_getxattr(user_ns, dentry, XATTR_NAME_DOS_ATTRIBUTE, |
070fb21e | 1600 | (char **)&n.data); |
f4415848 NJ |
1601 | if (err > 0) { |
1602 | n.length = err; | |
1603 | if (ndr_decode_dos_attr(&n, da)) | |
1604 | err = -EINVAL; | |
79f6b11a | 1605 | kfree(n.data); |
64b39f4a | 1606 | } else { |
f4415848 | 1607 | ksmbd_debug(SMB, "failed to load dos attribute in xattr\n"); |
64b39f4a | 1608 | } |
f4415848 NJ |
1609 | |
1610 | return err; | |
1611 | } | |
1612 | ||
f4415848 NJ |
1613 | /** |
1614 | * ksmbd_vfs_init_kstat() - convert unix stat information to smb stat format | |
1615 | * @p: destination buffer | |
1616 | * @ksmbd_kstat: ksmbd kstat wrapper | |
1617 | */ | |
1618 | void *ksmbd_vfs_init_kstat(char **p, struct ksmbd_kstat *ksmbd_kstat) | |
1619 | { | |
1620 | struct file_directory_info *info = (struct file_directory_info *)(*p); | |
1621 | struct kstat *kstat = ksmbd_kstat->kstat; | |
1622 | u64 time; | |
1623 | ||
1624 | info->FileIndex = 0; | |
1625 | info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time); | |
1626 | time = ksmbd_UnixTimeToNT(kstat->atime); | |
1627 | info->LastAccessTime = cpu_to_le64(time); | |
1628 | time = ksmbd_UnixTimeToNT(kstat->mtime); | |
1629 | info->LastWriteTime = cpu_to_le64(time); | |
1630 | time = ksmbd_UnixTimeToNT(kstat->ctime); | |
1631 | info->ChangeTime = cpu_to_le64(time); | |
1632 | ||
1633 | if (ksmbd_kstat->file_attributes & ATTR_DIRECTORY_LE) { | |
1634 | info->EndOfFile = 0; | |
1635 | info->AllocationSize = 0; | |
1636 | } else { | |
1637 | info->EndOfFile = cpu_to_le64(kstat->size); | |
1638 | info->AllocationSize = cpu_to_le64(kstat->blocks << 9); | |
1639 | } | |
1640 | info->ExtFileAttributes = ksmbd_kstat->file_attributes; | |
1641 | ||
1642 | return info; | |
1643 | } | |
1644 | ||
af34983e HL |
1645 | int ksmbd_vfs_fill_dentry_attrs(struct ksmbd_work *work, |
1646 | struct user_namespace *user_ns, | |
1647 | struct dentry *dentry, | |
070fb21e | 1648 | struct ksmbd_kstat *ksmbd_kstat) |
f4415848 NJ |
1649 | { |
1650 | u64 time; | |
1651 | int rc; | |
1652 | ||
af34983e | 1653 | generic_fillattr(user_ns, d_inode(dentry), ksmbd_kstat->kstat); |
f4415848 NJ |
1654 | |
1655 | time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime); | |
1656 | ksmbd_kstat->create_time = time; | |
1657 | ||
1658 | /* | |
1659 | * set default value for the case that store dos attributes is not yes | |
1660 | * or that acl is disable in server's filesystem and the config is yes. | |
1661 | */ | |
1662 | if (S_ISDIR(ksmbd_kstat->kstat->mode)) | |
1663 | ksmbd_kstat->file_attributes = ATTR_DIRECTORY_LE; | |
1664 | else | |
1665 | ksmbd_kstat->file_attributes = ATTR_ARCHIVE_LE; | |
1666 | ||
1667 | if (test_share_config_flag(work->tcon->share_conf, | |
64b39f4a | 1668 | KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) { |
f4415848 NJ |
1669 | struct xattr_dos_attrib da; |
1670 | ||
af34983e | 1671 | rc = ksmbd_vfs_get_dos_attrib_xattr(user_ns, dentry, &da); |
f4415848 NJ |
1672 | if (rc > 0) { |
1673 | ksmbd_kstat->file_attributes = cpu_to_le32(da.attr); | |
1674 | ksmbd_kstat->create_time = da.create_time; | |
64b39f4a | 1675 | } else { |
f4415848 | 1676 | ksmbd_debug(VFS, "fail to load dos attribute.\n"); |
64b39f4a | 1677 | } |
f4415848 NJ |
1678 | } |
1679 | ||
1680 | return 0; | |
1681 | } | |
1682 | ||
af34983e HL |
1683 | ssize_t ksmbd_vfs_casexattr_len(struct user_namespace *user_ns, |
1684 | struct dentry *dentry, char *attr_name, | |
070fb21e | 1685 | int attr_name_len) |
f4415848 NJ |
1686 | { |
1687 | char *name, *xattr_list = NULL; | |
1688 | ssize_t value_len = -ENOENT, xattr_list_len; | |
1689 | ||
1690 | xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list); | |
1691 | if (xattr_list_len <= 0) | |
1692 | goto out; | |
1693 | ||
1694 | for (name = xattr_list; name - xattr_list < xattr_list_len; | |
1695 | name += strlen(name) + 1) { | |
1696 | ksmbd_debug(VFS, "%s, len %zd\n", name, strlen(name)); | |
1697 | if (strncasecmp(attr_name, name, attr_name_len)) | |
1698 | continue; | |
1699 | ||
af34983e | 1700 | value_len = ksmbd_vfs_xattr_len(user_ns, dentry, name); |
f4415848 NJ |
1701 | break; |
1702 | } | |
1703 | ||
1704 | out: | |
79f6b11a | 1705 | kvfree(xattr_list); |
f4415848 NJ |
1706 | return value_len; |
1707 | } | |
1708 | ||
64b39f4a | 1709 | int ksmbd_vfs_xattr_stream_name(char *stream_name, char **xattr_stream_name, |
070fb21e | 1710 | size_t *xattr_stream_name_size, int s_type) |
f4415848 | 1711 | { |
07781de9 | 1712 | char *type, *buf; |
f4415848 NJ |
1713 | |
1714 | if (s_type == DIR_STREAM) | |
1715 | type = ":$INDEX_ALLOCATION"; | |
1716 | else | |
1717 | type = ":$DATA"; | |
1718 | ||
07781de9 DC |
1719 | buf = kasprintf(GFP_KERNEL, "%s%s%s", |
1720 | XATTR_NAME_STREAM, stream_name, type); | |
1721 | if (!buf) | |
f4415848 NJ |
1722 | return -ENOMEM; |
1723 | ||
07781de9 DC |
1724 | *xattr_stream_name = buf; |
1725 | *xattr_stream_name_size = strlen(buf) + 1; | |
f4415848 NJ |
1726 | |
1727 | return 0; | |
1728 | } | |
1729 | ||
f4415848 | 1730 | int ksmbd_vfs_copy_file_ranges(struct ksmbd_work *work, |
070fb21e NJ |
1731 | struct ksmbd_file *src_fp, |
1732 | struct ksmbd_file *dst_fp, | |
1733 | struct srv_copychunk *chunks, | |
1734 | unsigned int chunk_count, | |
1735 | unsigned int *chunk_count_written, | |
1736 | unsigned int *chunk_size_written, | |
1737 | loff_t *total_size_written) | |
f4415848 NJ |
1738 | { |
1739 | unsigned int i; | |
1740 | loff_t src_off, dst_off, src_file_size; | |
1741 | size_t len; | |
1742 | int ret; | |
1743 | ||
1744 | *chunk_count_written = 0; | |
1745 | *chunk_size_written = 0; | |
1746 | *total_size_written = 0; | |
1747 | ||
1748 | if (!(src_fp->daccess & (FILE_READ_DATA_LE | FILE_EXECUTE_LE))) { | |
493fa2fb | 1749 | pr_err("no right to read(%pd)\n", src_fp->filp->f_path.dentry); |
f4415848 NJ |
1750 | return -EACCES; |
1751 | } | |
1752 | if (!(dst_fp->daccess & (FILE_WRITE_DATA_LE | FILE_APPEND_DATA_LE))) { | |
493fa2fb | 1753 | pr_err("no right to write(%pd)\n", dst_fp->filp->f_path.dentry); |
f4415848 NJ |
1754 | return -EACCES; |
1755 | } | |
1756 | ||
1757 | if (ksmbd_stream_fd(src_fp) || ksmbd_stream_fd(dst_fp)) | |
1758 | return -EBADF; | |
1759 | ||
1760 | smb_break_all_levII_oplock(work, dst_fp, 1); | |
1761 | ||
c36fca86 NJ |
1762 | if (!work->tcon->posix_extensions) { |
1763 | for (i = 0; i < chunk_count; i++) { | |
1764 | src_off = le64_to_cpu(chunks[i].SourceOffset); | |
1765 | dst_off = le64_to_cpu(chunks[i].TargetOffset); | |
1766 | len = le32_to_cpu(chunks[i].Length); | |
1767 | ||
1768 | if (check_lock_range(src_fp->filp, src_off, | |
64b39f4a | 1769 | src_off + len - 1, READ)) |
c36fca86 NJ |
1770 | return -EAGAIN; |
1771 | if (check_lock_range(dst_fp->filp, dst_off, | |
64b39f4a | 1772 | dst_off + len - 1, WRITE)) |
c36fca86 NJ |
1773 | return -EAGAIN; |
1774 | } | |
f4415848 NJ |
1775 | } |
1776 | ||
1777 | src_file_size = i_size_read(file_inode(src_fp->filp)); | |
1778 | ||
1779 | for (i = 0; i < chunk_count; i++) { | |
1780 | src_off = le64_to_cpu(chunks[i].SourceOffset); | |
1781 | dst_off = le64_to_cpu(chunks[i].TargetOffset); | |
1782 | len = le32_to_cpu(chunks[i].Length); | |
1783 | ||
1784 | if (src_off + len > src_file_size) | |
1785 | return -E2BIG; | |
1786 | ||
f8524776 NJ |
1787 | ret = vfs_copy_file_range(src_fp->filp, src_off, |
1788 | dst_fp->filp, dst_off, len, 0); | |
f4415848 NJ |
1789 | if (ret < 0) |
1790 | return ret; | |
1791 | ||
1792 | *chunk_count_written += 1; | |
1793 | *total_size_written += ret; | |
1794 | } | |
1795 | return 0; | |
1796 | } | |
1797 | ||
45a64e8b | 1798 | void ksmbd_vfs_posix_lock_wait(struct file_lock *flock) |
f4415848 | 1799 | { |
45a64e8b | 1800 | wait_event(flock->fl_wait, !flock->fl_blocker); |
f4415848 NJ |
1801 | } |
1802 | ||
1803 | int ksmbd_vfs_posix_lock_wait_timeout(struct file_lock *flock, long timeout) | |
1804 | { | |
1805 | return wait_event_interruptible_timeout(flock->fl_wait, | |
1806 | !flock->fl_blocker, | |
1807 | timeout); | |
1808 | } | |
1809 | ||
1810 | void ksmbd_vfs_posix_lock_unblock(struct file_lock *flock) | |
1811 | { | |
1812 | locks_delete_block(flock); | |
1813 | } | |
1814 | ||
af34983e HL |
1815 | int ksmbd_vfs_set_init_posix_acl(struct user_namespace *user_ns, |
1816 | struct inode *inode) | |
f4415848 NJ |
1817 | { |
1818 | struct posix_acl_state acl_state; | |
1819 | struct posix_acl *acls; | |
1820 | int rc; | |
1821 | ||
777cad16 NJ |
1822 | if (!IS_ENABLED(CONFIG_FS_POSIX_ACL)) |
1823 | return -EOPNOTSUPP; | |
1824 | ||
f4415848 NJ |
1825 | ksmbd_debug(SMB, "Set posix acls\n"); |
1826 | rc = init_acl_state(&acl_state, 1); | |
1827 | if (rc) | |
1828 | return rc; | |
1829 | ||
1830 | /* Set default owner group */ | |
1831 | acl_state.owner.allow = (inode->i_mode & 0700) >> 6; | |
1832 | acl_state.group.allow = (inode->i_mode & 0070) >> 3; | |
1833 | acl_state.other.allow = inode->i_mode & 0007; | |
1834 | acl_state.users->aces[acl_state.users->n].uid = inode->i_uid; | |
1835 | acl_state.users->aces[acl_state.users->n++].perms.allow = | |
1836 | acl_state.owner.allow; | |
1837 | acl_state.groups->aces[acl_state.groups->n].gid = inode->i_gid; | |
1838 | acl_state.groups->aces[acl_state.groups->n++].perms.allow = | |
1839 | acl_state.group.allow; | |
1840 | acl_state.mask.allow = 0x07; | |
1841 | ||
67d1c432 | 1842 | acls = posix_acl_alloc(6, GFP_KERNEL); |
f4415848 NJ |
1843 | if (!acls) { |
1844 | free_acl_state(&acl_state); | |
1845 | return -ENOMEM; | |
1846 | } | |
1847 | posix_state_to_acl(&acl_state, acls->a_entries); | |
af34983e | 1848 | rc = set_posix_acl(user_ns, inode, ACL_TYPE_ACCESS, acls); |
f4415848 NJ |
1849 | if (rc < 0) |
1850 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_ACCESS) failed, rc : %d\n", | |
070fb21e | 1851 | rc); |
f4415848 NJ |
1852 | else if (S_ISDIR(inode->i_mode)) { |
1853 | posix_state_to_acl(&acl_state, acls->a_entries); | |
af34983e | 1854 | rc = set_posix_acl(user_ns, inode, ACL_TYPE_DEFAULT, |
67d1c432 | 1855 | acls); |
f4415848 NJ |
1856 | if (rc < 0) |
1857 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_DEFAULT) failed, rc : %d\n", | |
070fb21e | 1858 | rc); |
f4415848 NJ |
1859 | } |
1860 | free_acl_state(&acl_state); | |
1861 | posix_acl_release(acls); | |
1862 | return rc; | |
1863 | } | |
1864 | ||
af34983e HL |
1865 | int ksmbd_vfs_inherit_posix_acl(struct user_namespace *user_ns, |
1866 | struct inode *inode, struct inode *parent_inode) | |
f4415848 NJ |
1867 | { |
1868 | struct posix_acl *acls; | |
1869 | struct posix_acl_entry *pace; | |
1870 | int rc, i; | |
1871 | ||
777cad16 NJ |
1872 | if (!IS_ENABLED(CONFIG_FS_POSIX_ACL)) |
1873 | return -EOPNOTSUPP; | |
1874 | ||
67d1c432 | 1875 | acls = get_acl(parent_inode, ACL_TYPE_DEFAULT); |
f4415848 NJ |
1876 | if (!acls) |
1877 | return -ENOENT; | |
1878 | pace = acls->a_entries; | |
1879 | ||
1880 | for (i = 0; i < acls->a_count; i++, pace++) { | |
1881 | if (pace->e_tag == ACL_MASK) { | |
1882 | pace->e_perm = 0x07; | |
1883 | break; | |
1884 | } | |
1885 | } | |
1886 | ||
af34983e | 1887 | rc = set_posix_acl(user_ns, inode, ACL_TYPE_ACCESS, acls); |
f4415848 NJ |
1888 | if (rc < 0) |
1889 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_ACCESS) failed, rc : %d\n", | |
070fb21e | 1890 | rc); |
f4415848 | 1891 | if (S_ISDIR(inode->i_mode)) { |
af34983e | 1892 | rc = set_posix_acl(user_ns, inode, ACL_TYPE_DEFAULT, |
67d1c432 | 1893 | acls); |
f4415848 NJ |
1894 | if (rc < 0) |
1895 | ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_DEFAULT) failed, rc : %d\n", | |
070fb21e | 1896 | rc); |
f4415848 NJ |
1897 | } |
1898 | posix_acl_release(acls); | |
1899 | return rc; | |
1900 | } |