Commit | Line | Data |
---|---|---|
e0e72660 | 1 | /* |
ab5be9fa | 2 | * Copyright (C) 2020 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
e0e72660 | 3 | * |
ab5be9fa | 4 | * SPDX-License-Identifier: GPL-2.0-only |
e0e72660 | 5 | * |
e0e72660 JG |
6 | */ |
7 | ||
c9e313bc SM |
8 | #include <common/defaults.hpp> |
9 | #include <common/error.hpp> | |
10 | #include <common/hashtable/utils.hpp> | |
11 | #include <common/macros.hpp> | |
12 | #include <common/optional.hpp> | |
13 | #include <common/string-utils/format.hpp> | |
14 | #include <common/utils.hpp> | |
5c1f54d1 JG |
15 | #include <inttypes.h> |
16 | #include <lttng/constant.h> | |
e0e72660 | 17 | #include <sys/stat.h> |
5c1f54d1 | 18 | #include <sys/types.h> |
e0e72660 | 19 | #include <unistd.h> |
e0e72660 | 20 | #include <urcu.h> |
e0e72660 | 21 | #include <urcu/rculfhash.h> |
5c1f54d1 | 22 | #include <urcu/ref.h> |
e0e72660 | 23 | |
c9e313bc | 24 | #include "inode.hpp" |
e0e72660 | 25 | |
f1494934 | 26 | namespace { |
e0e72660 JG |
27 | struct inode_id { |
28 | dev_t device; | |
29 | ino_t inode; | |
30 | }; | |
f1494934 | 31 | } /* namespace */ |
e0e72660 JG |
32 | |
33 | struct lttng_inode_registry { | |
34 | /* Hashtable of inode_id to lttng_inode. */ | |
35 | struct cds_lfht *inodes; | |
36 | }; | |
37 | ||
38 | struct lttng_inode { | |
39 | struct inode_id id; | |
e0e72660 JG |
40 | /* Node in the lttng_inode_registry's ht. */ |
41 | struct cds_lfht_node registry_node; | |
42 | /* Weak reference to ht containing the node. */ | |
43 | struct cds_lfht *registry_ht; | |
44 | struct urcu_ref ref; | |
45 | struct rcu_head rcu_head; | |
f7c3ffd7 JG |
46 | /* Location from which this file can be opened. */ |
47 | struct { | |
48 | struct lttng_directory_handle *directory_handle; | |
49 | char *path; | |
50 | } location; | |
51 | /* Unlink the underlying file at the release of the inode. */ | |
52 | bool unlink_pending; | |
53 | LTTNG_OPTIONAL(unsigned int) unlinked_id; | |
54 | /* Weak reference. */ | |
55 | struct lttng_unlinked_file_pool *unlinked_file_pool; | |
56 | }; | |
57 | ||
58 | struct lttng_unlinked_file_pool { | |
59 | struct lttng_directory_handle *unlink_directory_handle; | |
60 | char *unlink_directory_path; | |
61 | unsigned int file_count; | |
62 | unsigned int next_id; | |
e0e72660 JG |
63 | }; |
64 | ||
f1494934 JG |
65 | namespace { |
66 | struct { | |
e0e72660 JG |
67 | pthread_mutex_t lock; |
68 | bool initialized; | |
69 | unsigned long value; | |
70 | } seed = { | |
5c1f54d1 | 71 | .lock = PTHREAD_MUTEX_INITIALIZER, |
1c9a0b0e MJ |
72 | .initialized = false, |
73 | .value = 0, | |
e0e72660 | 74 | }; |
f1494934 | 75 | } /* namespace */ |
e0e72660 | 76 | |
f7c3ffd7 | 77 | static unsigned long lttng_inode_id_hash(const struct inode_id *id) |
e0e72660 JG |
78 | { |
79 | uint64_t device = id->device, inode_no = id->inode; | |
80 | ||
5c1f54d1 JG |
81 | return hash_key_u64(&device, seed.value) ^ |
82 | hash_key_u64(&inode_no, seed.value); | |
e0e72660 JG |
83 | } |
84 | ||
5c1f54d1 | 85 | static int lttng_inode_match(struct cds_lfht_node *node, const void *key) |
e0e72660 | 86 | { |
e032c6fd | 87 | const struct inode_id *id = (inode_id *) key; |
f7c3ffd7 | 88 | const struct lttng_inode *inode = caa_container_of( |
5c1f54d1 | 89 | node, struct lttng_inode, registry_node); |
e0e72660 JG |
90 | |
91 | return inode->id.device == id->device && inode->id.inode == id->inode; | |
92 | } | |
93 | ||
f7c3ffd7 | 94 | static void lttng_inode_free(struct rcu_head *head) |
e0e72660 | 95 | { |
5c1f54d1 JG |
96 | struct lttng_inode *inode = |
97 | caa_container_of(head, struct lttng_inode, rcu_head); | |
e0e72660 | 98 | |
e0e72660 JG |
99 | free(inode); |
100 | } | |
101 | ||
f7c3ffd7 JG |
102 | static int lttng_unlinked_file_pool_add_inode( |
103 | struct lttng_unlinked_file_pool *pool, | |
104 | struct lttng_inode *inode) | |
105 | { | |
106 | int ret; | |
107 | const unsigned int unlinked_id = pool->next_id++; | |
108 | char *inode_unlinked_name; | |
109 | bool reference_acquired; | |
110 | ||
111 | DBG("Adding inode of %s to unlinked file pool as id %u", | |
112 | inode->location.path, unlinked_id); | |
113 | ret = asprintf(&inode_unlinked_name, "%u", unlinked_id); | |
114 | if (ret < 0) { | |
115 | ERR("Failed to format unlinked inode name"); | |
116 | ret = -1; | |
117 | goto end; | |
118 | } | |
119 | ||
120 | if (pool->file_count == 0) { | |
121 | DBG("Creating unlinked files directory at %s", | |
122 | pool->unlink_directory_path); | |
a0377dfe | 123 | LTTNG_ASSERT(!pool->unlink_directory_handle); |
f7c3ffd7 JG |
124 | ret = utils_mkdir(pool->unlink_directory_path, |
125 | S_IRWXU | S_IRWXG, -1, -1); | |
126 | if (ret) { | |
127 | if (errno == EEXIST) { | |
128 | /* | |
129 | * Unexpected (previous crash?), but not an | |
130 | * error. | |
131 | */ | |
132 | DBG("Unlinked file directory \"%s\" already exists", | |
133 | pool->unlink_directory_path); | |
134 | } else { | |
135 | PERROR("Failed to create unlinked files directory at %s", | |
136 | pool->unlink_directory_path); | |
137 | goto end; | |
138 | } | |
139 | } | |
140 | pool->unlink_directory_handle = lttng_directory_handle_create( | |
141 | pool->unlink_directory_path); | |
d05a3d93 JG |
142 | if (!pool->unlink_directory_handle) { |
143 | ERR("Failed to create directory handle to unlinked file pool at %s", | |
144 | pool->unlink_directory_path); | |
145 | ret = -1; | |
146 | goto end; | |
147 | } | |
f7c3ffd7 JG |
148 | } |
149 | ||
150 | ret = lttng_directory_handle_rename(inode->location.directory_handle, | |
151 | inode->location.path, pool->unlink_directory_handle, | |
152 | inode_unlinked_name); | |
153 | if (ret) { | |
154 | goto end; | |
155 | } | |
156 | ||
157 | lttng_directory_handle_put(inode->location.directory_handle); | |
158 | inode->location.directory_handle = NULL; | |
159 | reference_acquired = lttng_directory_handle_get( | |
160 | pool->unlink_directory_handle); | |
a0377dfe | 161 | LTTNG_ASSERT(reference_acquired); |
f7c3ffd7 JG |
162 | inode->location.directory_handle = pool->unlink_directory_handle; |
163 | ||
164 | free(inode->location.path); | |
165 | inode->location.path = inode_unlinked_name; | |
166 | inode_unlinked_name = NULL; | |
167 | LTTNG_OPTIONAL_SET(&inode->unlinked_id, unlinked_id); | |
168 | pool->file_count++; | |
169 | end: | |
170 | free(inode_unlinked_name); | |
171 | return ret; | |
172 | } | |
173 | ||
174 | static int lttng_unlinked_file_pool_remove_inode( | |
175 | struct lttng_unlinked_file_pool *pool, | |
176 | struct lttng_inode *inode) | |
177 | { | |
178 | int ret; | |
179 | ||
180 | DBG("Removing inode with unlinked id %u from unlinked file pool", | |
181 | LTTNG_OPTIONAL_GET(inode->unlinked_id)); | |
182 | ||
183 | ret = lttng_directory_handle_unlink_file( | |
184 | inode->location.directory_handle, inode->location.path); | |
185 | if (ret) { | |
186 | PERROR("Failed to unlink file %s from unlinked file directory", | |
187 | inode->location.path); | |
188 | goto end; | |
189 | } | |
190 | free(inode->location.path); | |
191 | inode->location.path = NULL; | |
192 | lttng_directory_handle_put(inode->location.directory_handle); | |
193 | inode->location.directory_handle = NULL; | |
194 | ||
195 | pool->file_count--; | |
196 | if (pool->file_count == 0) { | |
197 | ret = utils_recursive_rmdir(pool->unlink_directory_path); | |
198 | if (ret) { | |
199 | /* | |
200 | * There is nothing the caller can do, don't report an | |
201 | * error except through logging. | |
202 | */ | |
203 | PERROR("Failed to remove unlinked files directory at %s", | |
204 | pool->unlink_directory_path); | |
205 | } | |
206 | lttng_directory_handle_put(pool->unlink_directory_handle); | |
207 | pool->unlink_directory_handle = NULL; | |
208 | } | |
209 | end: | |
210 | return ret; | |
211 | } | |
212 | ||
5c1f54d1 | 213 | static void lttng_inode_destroy(struct lttng_inode *inode) |
e0e72660 JG |
214 | { |
215 | if (!inode) { | |
216 | return; | |
217 | } | |
f7c3ffd7 JG |
218 | |
219 | rcu_read_lock(); | |
220 | cds_lfht_del(inode->registry_ht, &inode->registry_node); | |
221 | rcu_read_unlock(); | |
222 | ||
e0e72660 | 223 | if (inode->unlink_pending) { |
f7c3ffd7 | 224 | int ret; |
e0e72660 | 225 | |
a0377dfe FD |
226 | LTTNG_ASSERT(inode->location.directory_handle); |
227 | LTTNG_ASSERT(inode->location.path); | |
f7c3ffd7 JG |
228 | DBG("Removing %s from unlinked file pool", |
229 | inode->location.path); | |
230 | ret = lttng_unlinked_file_pool_remove_inode(inode->unlinked_file_pool, inode); | |
e0e72660 | 231 | if (ret) { |
f7c3ffd7 | 232 | PERROR("Failed to unlink %s", inode->location.path); |
e0e72660 JG |
233 | } |
234 | } | |
f7c3ffd7 JG |
235 | |
236 | lttng_directory_handle_put( | |
237 | inode->location.directory_handle); | |
238 | inode->location.directory_handle = NULL; | |
239 | free(inode->location.path); | |
240 | inode->location.path = NULL; | |
241 | call_rcu(&inode->rcu_head, lttng_inode_free); | |
e0e72660 JG |
242 | } |
243 | ||
5c1f54d1 | 244 | static void lttng_inode_release(struct urcu_ref *ref) |
e0e72660 | 245 | { |
5c1f54d1 | 246 | lttng_inode_destroy(caa_container_of(ref, struct lttng_inode, ref)); |
e0e72660 JG |
247 | } |
248 | ||
5c1f54d1 | 249 | static void lttng_inode_get(struct lttng_inode *inode) |
e0e72660 JG |
250 | { |
251 | urcu_ref_get(&inode->ref); | |
252 | } | |
253 | ||
ca806b0b | 254 | struct lttng_unlinked_file_pool *lttng_unlinked_file_pool_create( |
f7c3ffd7 JG |
255 | const char *path) |
256 | { | |
64803277 | 257 | struct lttng_unlinked_file_pool *pool = zmalloc<lttng_unlinked_file_pool>(); |
f7c3ffd7 | 258 | |
9604bd17 JG |
259 | if (!pool) { |
260 | goto error; | |
261 | } | |
262 | ||
f7c3ffd7 JG |
263 | if (!path || *path != '/') { |
264 | ERR("Unlinked file pool must be created with an absolute path, path = \"%s\"", | |
265 | path ? path : "NULL"); | |
266 | goto error; | |
267 | } | |
268 | ||
269 | pool->unlink_directory_path = strdup(path); | |
270 | if (!pool->unlink_directory_path) { | |
271 | PERROR("Failed to allocation unlinked file pool path"); | |
272 | goto error; | |
273 | } | |
274 | DBG("Unlinked file pool created at: %s", path); | |
275 | return pool; | |
276 | error: | |
277 | lttng_unlinked_file_pool_destroy(pool); | |
278 | return NULL; | |
279 | } | |
280 | ||
ca806b0b | 281 | void lttng_unlinked_file_pool_destroy( |
f7c3ffd7 JG |
282 | struct lttng_unlinked_file_pool *pool) |
283 | { | |
284 | if (!pool) { | |
285 | return; | |
286 | } | |
287 | ||
a0377dfe | 288 | LTTNG_ASSERT(pool->file_count == 0); |
f7c3ffd7 JG |
289 | lttng_directory_handle_put(pool->unlink_directory_handle); |
290 | free(pool->unlink_directory_path); | |
291 | free(pool); | |
292 | } | |
293 | ||
ca806b0b | 294 | void lttng_inode_put(struct lttng_inode *inode) |
e0e72660 JG |
295 | { |
296 | urcu_ref_put(&inode->ref, lttng_inode_release); | |
297 | } | |
298 | ||
ca806b0b | 299 | struct lttng_directory_handle * |
938bd422 | 300 | lttng_inode_get_location_directory_handle( |
dd95933f JG |
301 | struct lttng_inode *inode) |
302 | { | |
303 | if (inode->location.directory_handle) { | |
304 | const bool reference_acquired = lttng_directory_handle_get( | |
305 | inode->location.directory_handle); | |
306 | ||
a0377dfe | 307 | LTTNG_ASSERT(reference_acquired); |
dd95933f JG |
308 | } |
309 | return inode->location.directory_handle; | |
310 | } | |
311 | ||
ca806b0b | 312 | void lttng_inode_borrow_location(struct lttng_inode *inode, |
f7c3ffd7 JG |
313 | const struct lttng_directory_handle **out_directory_handle, |
314 | const char **out_path) | |
e0e72660 | 315 | { |
f7c3ffd7 JG |
316 | if (out_directory_handle) { |
317 | *out_directory_handle = inode->location.directory_handle; | |
318 | } | |
319 | if (out_path) { | |
320 | *out_path = inode->location.path; | |
321 | } | |
e0e72660 JG |
322 | } |
323 | ||
ca806b0b | 324 | int lttng_inode_rename( |
f7c3ffd7 JG |
325 | struct lttng_inode *inode, |
326 | struct lttng_directory_handle *old_directory_handle, | |
327 | const char *old_path, | |
328 | struct lttng_directory_handle *new_directory_handle, | |
329 | const char *new_path, | |
330 | bool overwrite) | |
e0e72660 JG |
331 | { |
332 | int ret = 0; | |
f7c3ffd7 JG |
333 | char *new_path_copy = strdup(new_path); |
334 | bool reference_acquired; | |
335 | ||
336 | DBG("Performing rename of inode from %s to %s with %s directory handles", | |
337 | old_path, new_path, | |
338 | lttng_directory_handle_equals(old_directory_handle, | |
339 | new_directory_handle) ? | |
340 | "identical" : | |
341 | "different"); | |
342 | ||
343 | if (!new_path_copy) { | |
344 | ret = -ENOMEM; | |
345 | goto end; | |
346 | } | |
e0e72660 JG |
347 | |
348 | if (inode->unlink_pending) { | |
f7c3ffd7 JG |
349 | WARN("An attempt to rename an unlinked file from %s to %s has been performed", |
350 | old_path, new_path); | |
e0e72660 JG |
351 | ret = -ENOENT; |
352 | goto end; | |
353 | } | |
354 | ||
355 | if (!overwrite) { | |
f7c3ffd7 | 356 | /* Verify that file doesn't exist. */ |
e0e72660 JG |
357 | struct stat statbuf; |
358 | ||
f7c3ffd7 JG |
359 | ret = lttng_directory_handle_stat( |
360 | new_directory_handle, new_path, &statbuf); | |
e0e72660 | 361 | if (ret == 0) { |
f7c3ffd7 JG |
362 | ERR("Refusing to rename %s as the destination already exists", |
363 | old_path); | |
e0e72660 JG |
364 | ret = -EEXIST; |
365 | goto end; | |
366 | } else if (ret < 0 && errno != ENOENT) { | |
367 | PERROR("Failed to stat() %s", new_path); | |
368 | ret = -errno; | |
369 | goto end; | |
370 | } | |
371 | } | |
372 | ||
f7c3ffd7 JG |
373 | ret = lttng_directory_handle_rename(old_directory_handle, old_path, |
374 | new_directory_handle, new_path); | |
e0e72660 | 375 | if (ret) { |
f7c3ffd7 | 376 | PERROR("Failed to rename file %s to %s", old_path, new_path); |
e0e72660 JG |
377 | ret = -errno; |
378 | goto end; | |
379 | } | |
380 | ||
f7c3ffd7 | 381 | reference_acquired = lttng_directory_handle_get(new_directory_handle); |
a0377dfe | 382 | LTTNG_ASSERT(reference_acquired); |
f7c3ffd7 JG |
383 | lttng_directory_handle_put(inode->location.directory_handle); |
384 | free(inode->location.path); | |
385 | inode->location.directory_handle = new_directory_handle; | |
386 | /* Ownership transferred. */ | |
387 | inode->location.path = new_path_copy; | |
e0e72660 JG |
388 | new_path_copy = NULL; |
389 | end: | |
390 | free(new_path_copy); | |
391 | return ret; | |
392 | } | |
393 | ||
ca806b0b | 394 | int lttng_inode_unlink(struct lttng_inode *inode) |
e0e72660 JG |
395 | { |
396 | int ret = 0; | |
f7c3ffd7 JG |
397 | |
398 | DBG("Attempting unlink of inode %s", inode->location.path); | |
e0e72660 JG |
399 | |
400 | if (inode->unlink_pending) { | |
401 | WARN("An attempt to re-unlink %s has been performed, ignoring.", | |
f7c3ffd7 | 402 | inode->location.path); |
e0e72660 JG |
403 | ret = -ENOENT; |
404 | goto end; | |
405 | } | |
406 | ||
f7c3ffd7 JG |
407 | /* |
408 | * Move to the temporary "deleted" directory until all | |
409 | * references are released. | |
410 | */ | |
411 | ret = lttng_unlinked_file_pool_add_inode( | |
412 | inode->unlinked_file_pool, inode); | |
413 | if (ret) { | |
414 | PERROR("Failed to add inode \"%s\" to the unlinked file pool", | |
415 | inode->location.path); | |
e0e72660 JG |
416 | goto end; |
417 | } | |
f7c3ffd7 | 418 | inode->unlink_pending = true; |
e0e72660 JG |
419 | end: |
420 | return ret; | |
421 | } | |
422 | ||
5c1f54d1 | 423 | static struct lttng_inode *lttng_inode_create(const struct inode_id *id, |
f7c3ffd7 JG |
424 | struct cds_lfht *ht, |
425 | struct lttng_unlinked_file_pool *unlinked_file_pool, | |
426 | struct lttng_directory_handle *directory_handle, | |
427 | const char *path) | |
e0e72660 | 428 | { |
f7c3ffd7 JG |
429 | struct lttng_inode *inode = NULL; |
430 | char *path_copy; | |
431 | bool reference_acquired; | |
432 | ||
433 | path_copy = strdup(path); | |
434 | if (!path_copy) { | |
435 | goto end; | |
436 | } | |
e0e72660 | 437 | |
f7c3ffd7 | 438 | reference_acquired = lttng_directory_handle_get(directory_handle); |
a0377dfe | 439 | LTTNG_ASSERT(reference_acquired); |
f7c3ffd7 | 440 | |
64803277 | 441 | inode = zmalloc<lttng_inode>(); |
e0e72660 JG |
442 | if (!inode) { |
443 | goto end; | |
444 | } | |
445 | ||
446 | urcu_ref_init(&inode->ref); | |
447 | cds_lfht_node_init(&inode->registry_node); | |
448 | inode->id = *id; | |
e0e72660 | 449 | inode->registry_ht = ht; |
f7c3ffd7 JG |
450 | inode->unlinked_file_pool = unlinked_file_pool; |
451 | /* Ownership of path copy is transferred to inode. */ | |
452 | inode->location.path = path_copy; | |
453 | path_copy = NULL; | |
454 | inode->location.directory_handle = directory_handle; | |
e0e72660 | 455 | end: |
f7c3ffd7 | 456 | free(path_copy); |
e0e72660 | 457 | return inode; |
e0e72660 JG |
458 | } |
459 | ||
ca806b0b | 460 | struct lttng_inode_registry *lttng_inode_registry_create(void) |
e0e72660 | 461 | { |
64803277 | 462 | struct lttng_inode_registry *registry = zmalloc<lttng_inode_registry>(); |
e0e72660 JG |
463 | |
464 | if (!registry) { | |
465 | goto end; | |
466 | } | |
467 | ||
468 | pthread_mutex_lock(&seed.lock); | |
469 | if (!seed.initialized) { | |
470 | seed.value = (unsigned long) time(NULL); | |
471 | seed.initialized = true; | |
472 | } | |
473 | pthread_mutex_unlock(&seed.lock); | |
474 | ||
475 | registry->inodes = cds_lfht_new(DEFAULT_HT_SIZE, 1, 0, | |
476 | CDS_LFHT_AUTO_RESIZE | CDS_LFHT_ACCOUNTING, NULL); | |
477 | if (!registry->inodes) { | |
478 | goto error; | |
479 | } | |
480 | end: | |
481 | return registry; | |
482 | error: | |
483 | lttng_inode_registry_destroy(registry); | |
484 | return NULL; | |
485 | } | |
486 | ||
ca806b0b | 487 | void lttng_inode_registry_destroy( |
938bd422 | 488 | struct lttng_inode_registry *registry) |
e0e72660 JG |
489 | { |
490 | if (!registry) { | |
491 | return; | |
492 | } | |
493 | if (registry->inodes) { | |
494 | int ret = cds_lfht_destroy(registry->inodes, NULL); | |
495 | ||
a0377dfe | 496 | LTTNG_ASSERT(!ret); |
e0e72660 JG |
497 | } |
498 | free(registry); | |
499 | } | |
500 | ||
ca806b0b | 501 | struct lttng_inode *lttng_inode_registry_get_inode( |
f7c3ffd7 JG |
502 | struct lttng_inode_registry *registry, |
503 | struct lttng_directory_handle *handle, | |
504 | const char *path, | |
505 | int fd, | |
506 | struct lttng_unlinked_file_pool *unlinked_file_pool) | |
e0e72660 JG |
507 | { |
508 | int ret; | |
509 | struct stat statbuf; | |
510 | struct inode_id id; | |
511 | struct cds_lfht_iter iter; | |
512 | struct cds_lfht_node *node; | |
513 | struct lttng_inode *inode = NULL; | |
514 | ||
515 | ret = fstat(fd, &statbuf); | |
516 | if (ret < 0) { | |
f7c3ffd7 | 517 | PERROR("stat() failed on fd %i", fd); |
e0e72660 JG |
518 | goto end; |
519 | } | |
520 | ||
521 | id.device = statbuf.st_dev; | |
522 | id.inode = statbuf.st_ino; | |
523 | ||
524 | rcu_read_lock(); | |
5c1f54d1 JG |
525 | cds_lfht_lookup(registry->inodes, lttng_inode_id_hash(&id), |
526 | lttng_inode_match, &id, &iter); | |
e0e72660 JG |
527 | node = cds_lfht_iter_get_node(&iter); |
528 | if (node) { | |
5c1f54d1 JG |
529 | inode = caa_container_of( |
530 | node, struct lttng_inode, registry_node); | |
e0e72660 JG |
531 | lttng_inode_get(inode); |
532 | goto end_unlock; | |
533 | } | |
534 | ||
f7c3ffd7 JG |
535 | inode = lttng_inode_create(&id, registry->inodes, unlinked_file_pool, |
536 | handle, path); | |
640b9481 JR |
537 | if (!inode) { |
538 | goto end_unlock; | |
539 | } | |
540 | ||
e0e72660 | 541 | node = cds_lfht_add_unique(registry->inodes, |
5c1f54d1 JG |
542 | lttng_inode_id_hash(&inode->id), lttng_inode_match, |
543 | &inode->id, &inode->registry_node); | |
a0377dfe | 544 | LTTNG_ASSERT(node == &inode->registry_node); |
e0e72660 JG |
545 | end_unlock: |
546 | rcu_read_unlock(); | |
547 | end: | |
548 | return inode; | |
549 | } |