1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _FS_CEPH_MDS_CLIENT_H |
3 | #define _FS_CEPH_MDS_CLIENT_H |
4 | |
5 | #include <linux/completion.h> |
6 | #include <linux/kref.h> |
7 | #include <linux/list.h> |
8 | #include <linux/mutex.h> |
9 | #include <linux/rbtree.h> |
10 | #include <linux/spinlock.h> |
11 | #include <linux/refcount.h> |
12 | #include <linux/utsname.h> |
13 | #include <linux/ktime.h> |
14 | |
15 | #include <linux/ceph/types.h> |
16 | #include <linux/ceph/messenger.h> |
17 | #include <linux/ceph/auth.h> |
18 | |
19 | #include "mdsmap.h" |
20 | #include "metric.h" |
21 | #include "super.h" |
22 | |
23 | /* The first 8 bits are reserved for old ceph releases */ |
24 | enum ceph_feature_type { |
25 | CEPHFS_FEATURE_MIMIC = 8, |
26 | CEPHFS_FEATURE_REPLY_ENCODING, |
27 | CEPHFS_FEATURE_RECLAIM_CLIENT, |
28 | CEPHFS_FEATURE_LAZY_CAP_WANTED, |
29 | CEPHFS_FEATURE_MULTI_RECONNECT, |
30 | CEPHFS_FEATURE_DELEG_INO, |
31 | CEPHFS_FEATURE_METRIC_COLLECT, |
32 | CEPHFS_FEATURE_ALTERNATE_NAME, |
33 | CEPHFS_FEATURE_NOTIFY_SESSION_STATE, |
34 | CEPHFS_FEATURE_OP_GETVXATTR, |
35 | CEPHFS_FEATURE_32BITS_RETRY_FWD, |
36 | CEPHFS_FEATURE_NEW_SNAPREALM_INFO, |
37 | CEPHFS_FEATURE_HAS_OWNER_UIDGID, |
38 | |
39 | CEPHFS_FEATURE_MAX = CEPHFS_FEATURE_HAS_OWNER_UIDGID, |
40 | }; |
41 | |
42 | #define CEPHFS_FEATURES_CLIENT_SUPPORTED { \ |
43 | 0, 1, 2, 3, 4, 5, 6, 7, \ |
44 | CEPHFS_FEATURE_MIMIC, \ |
45 | CEPHFS_FEATURE_REPLY_ENCODING, \ |
46 | CEPHFS_FEATURE_LAZY_CAP_WANTED, \ |
47 | CEPHFS_FEATURE_MULTI_RECONNECT, \ |
48 | CEPHFS_FEATURE_DELEG_INO, \ |
49 | CEPHFS_FEATURE_METRIC_COLLECT, \ |
50 | CEPHFS_FEATURE_ALTERNATE_NAME, \ |
51 | CEPHFS_FEATURE_NOTIFY_SESSION_STATE, \ |
52 | CEPHFS_FEATURE_OP_GETVXATTR, \ |
53 | CEPHFS_FEATURE_32BITS_RETRY_FWD, \ |
54 | CEPHFS_FEATURE_HAS_OWNER_UIDGID, \ |
55 | } |
56 | |
57 | /* |
58 | * Some lock dependencies: |
59 | * |
60 | * session->s_mutex |
61 | * mdsc->mutex |
62 | * |
63 | * mdsc->snap_rwsem |
64 | * |
65 | * ci->i_ceph_lock |
66 | * mdsc->snap_flush_lock |
67 | * mdsc->cap_delay_lock |
68 | * |
69 | */ |
70 | |
71 | struct ceph_fs_client; |
72 | struct ceph_cap; |
73 | |
74 | /* |
75 | * parsed info about a single inode. pointers are into the encoded |
76 | * on-wire structures within the mds reply message payload. |
77 | */ |
78 | struct ceph_mds_reply_info_in { |
79 | struct ceph_mds_reply_inode *in; |
80 | struct ceph_dir_layout dir_layout; |
81 | u32 symlink_len; |
82 | char *symlink; |
83 | u32 xattr_len; |
84 | char *xattr_data; |
85 | u64 inline_version; |
86 | u32 inline_len; |
87 | char *inline_data; |
88 | u32 pool_ns_len; |
89 | char *pool_ns_data; |
90 | u64 max_bytes; |
91 | u64 max_files; |
92 | s32 dir_pin; |
93 | struct ceph_timespec btime; |
94 | struct ceph_timespec snap_btime; |
95 | u8 *fscrypt_auth; |
96 | u8 *fscrypt_file; |
97 | u32 fscrypt_auth_len; |
98 | u32 fscrypt_file_len; |
99 | u64 rsnaps; |
100 | u64 change_attr; |
101 | }; |
102 | |
103 | struct ceph_mds_reply_dir_entry { |
104 | bool is_nokey; |
105 | char *name; |
106 | u32 name_len; |
107 | u32 raw_hash; |
108 | struct ceph_mds_reply_lease *lease; |
109 | struct ceph_mds_reply_info_in inode; |
110 | loff_t offset; |
111 | }; |
112 | |
113 | struct ceph_mds_reply_xattr { |
114 | char *xattr_value; |
115 | size_t xattr_value_len; |
116 | }; |
117 | |
118 | /* |
119 | * parsed info about an mds reply, including information about |
120 | * either: 1) the target inode and/or its parent directory and dentry, |
121 | * and directory contents (for readdir results), or |
122 | * 2) the file range lock info (for fcntl F_GETLK results). |
123 | */ |
124 | struct ceph_mds_reply_info_parsed { |
125 | struct ceph_mds_reply_head *head; |
126 | |
127 | /* trace */ |
128 | struct ceph_mds_reply_info_in diri, targeti; |
129 | struct ceph_mds_reply_dirfrag *dirfrag; |
130 | char *dname; |
131 | u8 *altname; |
132 | u32 dname_len; |
133 | u32 altname_len; |
134 | struct ceph_mds_reply_lease *dlease; |
135 | struct ceph_mds_reply_xattr xattr_info; |
136 | |
137 | /* extra */ |
138 | union { |
139 | /* for fcntl F_GETLK results */ |
140 | struct ceph_filelock *filelock_reply; |
141 | |
142 | /* for readdir results */ |
143 | struct { |
144 | struct ceph_mds_reply_dirfrag *dir_dir; |
145 | size_t dir_buf_size; |
146 | int dir_nr; |
147 | bool dir_end; |
148 | bool dir_complete; |
149 | bool hash_order; |
150 | bool offset_hash; |
151 | struct ceph_mds_reply_dir_entry *dir_entries; |
152 | }; |
153 | |
154 | /* for create results */ |
155 | struct { |
156 | bool has_create_ino; |
157 | u64 ino; |
158 | }; |
159 | }; |
160 | |
161 | /* encoded blob describing snapshot contexts for certain |
162 | operations (e.g., open) */ |
163 | void *snapblob; |
164 | int snapblob_len; |
165 | }; |
166 | |
167 | |
168 | /* |
169 | * cap releases are batched and sent to the MDS en masse. |
170 | * |
171 | * Account for per-message overhead of mds_cap_release header |
172 | * and __le32 for osd epoch barrier trailing field. |
173 | */ |
174 | #define CEPH_CAPS_PER_RELEASE ((PAGE_SIZE - sizeof(u32) - \ |
175 | sizeof(struct ceph_mds_cap_release)) / \ |
176 | sizeof(struct ceph_mds_cap_item)) |
177 | |
178 | |
179 | /* |
180 | * state associated with each MDS<->client session |
181 | */ |
182 | enum { |
183 | CEPH_MDS_SESSION_NEW = 1, |
184 | CEPH_MDS_SESSION_OPENING = 2, |
185 | CEPH_MDS_SESSION_OPEN = 3, |
186 | CEPH_MDS_SESSION_HUNG = 4, |
187 | CEPH_MDS_SESSION_RESTARTING = 5, |
188 | CEPH_MDS_SESSION_RECONNECTING = 6, |
189 | CEPH_MDS_SESSION_CLOSING = 7, |
190 | CEPH_MDS_SESSION_CLOSED = 8, |
191 | CEPH_MDS_SESSION_REJECTED = 9, |
192 | }; |
193 | |
194 | struct ceph_mds_session { |
195 | struct ceph_mds_client *s_mdsc; |
196 | int s_mds; |
197 | int s_state; |
198 | unsigned long s_ttl; /* time until mds kills us */ |
199 | unsigned long s_features; |
200 | u64 s_seq; /* incoming msg seq # */ |
201 | struct mutex s_mutex; /* serialize session messages */ |
202 | |
203 | struct ceph_connection s_con; |
204 | |
205 | struct ceph_auth_handshake s_auth; |
206 | |
207 | atomic_t s_cap_gen; /* inc each time we get mds stale msg */ |
208 | unsigned long s_cap_ttl; /* when session caps expire. protected by s_mutex */ |
209 | |
210 | /* protected by s_cap_lock */ |
211 | spinlock_t s_cap_lock; |
212 | refcount_t s_ref; |
213 | struct list_head s_caps; /* all caps issued by this session */ |
214 | struct ceph_cap *s_cap_iterator; |
215 | int s_nr_caps; |
216 | int s_num_cap_releases; |
217 | int s_cap_reconnect; |
218 | int s_readonly; |
219 | struct list_head s_cap_releases; /* waiting cap_release messages */ |
220 | struct work_struct s_cap_release_work; |
221 | |
222 | /* See ceph_inode_info->i_dirty_item. */ |
223 | struct list_head s_cap_dirty; /* inodes w/ dirty caps */ |
224 | |
225 | /* See ceph_inode_info->i_flushing_item. */ |
226 | struct list_head s_cap_flushing; /* inodes w/ flushing caps */ |
227 | |
228 | unsigned long s_renew_requested; /* last time we sent a renew req */ |
229 | u64 s_renew_seq; |
230 | |
231 | struct list_head s_waiting; /* waiting requests */ |
232 | struct list_head s_unsafe; /* unsafe requests */ |
233 | struct xarray s_delegated_inos; |
234 | }; |
235 | |
236 | /* |
237 | * modes of choosing which MDS to send a request to |
238 | */ |
239 | enum { |
240 | USE_ANY_MDS, |
241 | USE_RANDOM_MDS, |
242 | USE_AUTH_MDS, /* prefer authoritative mds for this metadata item */ |
243 | }; |
244 | |
245 | struct ceph_mds_request; |
246 | struct ceph_mds_client; |
247 | |
248 | /* |
249 | * request completion callback |
250 | */ |
251 | typedef void (*ceph_mds_request_callback_t) (struct ceph_mds_client *mdsc, |
252 | struct ceph_mds_request *req); |
253 | /* |
254 | * wait for request completion callback |
255 | */ |
256 | typedef int (*ceph_mds_request_wait_callback_t) (struct ceph_mds_client *mdsc, |
257 | struct ceph_mds_request *req); |
258 | |
259 | /* |
260 | * an in-flight mds request |
261 | */ |
262 | struct ceph_mds_request { |
263 | u64 r_tid; /* transaction id */ |
264 | struct rb_node r_node; |
265 | struct ceph_mds_client *r_mdsc; |
266 | |
267 | struct kref r_kref; |
268 | int r_op; /* mds op code */ |
269 | |
270 | /* operation on what? */ |
271 | struct inode *r_inode; /* arg1 */ |
272 | struct dentry *r_dentry; /* arg1 */ |
273 | struct dentry *r_old_dentry; /* arg2: rename from or link from */ |
274 | struct inode *r_old_dentry_dir; /* arg2: old dentry's parent dir */ |
275 | char *r_path1, *r_path2; |
276 | struct ceph_vino r_ino1, r_ino2; |
277 | |
278 | struct inode *r_parent; /* parent dir inode */ |
279 | struct inode *r_target_inode; /* resulting inode */ |
280 | struct inode *r_new_inode; /* new inode (for creates) */ |
281 | |
282 | #define CEPH_MDS_R_DIRECT_IS_HASH (1) /* r_direct_hash is valid */ |
283 | #define CEPH_MDS_R_ABORTED (2) /* call was aborted */ |
284 | #define CEPH_MDS_R_GOT_UNSAFE (3) /* got an unsafe reply */ |
285 | #define CEPH_MDS_R_GOT_SAFE (4) /* got a safe reply */ |
286 | #define CEPH_MDS_R_GOT_RESULT (5) /* got a result */ |
287 | #define CEPH_MDS_R_DID_PREPOPULATE (6) /* prepopulated readdir */ |
288 | #define CEPH_MDS_R_PARENT_LOCKED (7) /* is r_parent->i_rwsem wlocked? */ |
289 | #define CEPH_MDS_R_ASYNC (8) /* async request */ |
290 | #define CEPH_MDS_R_FSCRYPT_FILE (9) /* must marshal fscrypt_file field */ |
291 | unsigned long r_req_flags; |
292 | |
293 | struct mutex r_fill_mutex; |
294 | |
295 | union ceph_mds_request_args r_args; |
296 | |
297 | struct ceph_fscrypt_auth *r_fscrypt_auth; |
298 | u64 r_fscrypt_file; |
299 | |
300 | u8 *r_altname; /* fscrypt binary crypttext for long filenames */ |
301 | u32 r_altname_len; /* length of r_altname */ |
302 | |
303 | int r_fmode; /* file mode, if expecting cap */ |
304 | int r_request_release_offset; |
305 | const struct cred *r_cred; |
306 | struct mnt_idmap *r_mnt_idmap; |
307 | struct timespec64 r_stamp; |
308 | |
309 | /* for choosing which mds to send this request to */ |
310 | int r_direct_mode; |
311 | u32 r_direct_hash; /* choose dir frag based on this dentry hash */ |
312 | |
313 | /* data payload is used for xattr ops */ |
314 | struct ceph_pagelist *r_pagelist; |
315 | |
316 | /* what caps shall we drop? */ |
317 | int r_inode_drop, r_inode_unless; |
318 | int r_dentry_drop, r_dentry_unless; |
319 | int r_old_dentry_drop, r_old_dentry_unless; |
320 | struct inode *r_old_inode; |
321 | int r_old_inode_drop, r_old_inode_unless; |
322 | |
323 | struct ceph_msg *r_request; /* original request */ |
324 | struct ceph_msg *r_reply; |
325 | struct ceph_mds_reply_info_parsed r_reply_info; |
326 | int r_err; |
327 | u32 r_readdir_offset; |
328 | |
329 | struct page *r_locked_page; |
330 | int r_dir_caps; |
331 | int r_num_caps; |
332 | |
333 | unsigned long r_timeout; /* optional. jiffies, 0 is "wait forever" */ |
334 | unsigned long r_started; /* start time to measure timeout against */ |
335 | unsigned long r_start_latency; /* start time to measure latency */ |
336 | unsigned long r_end_latency; /* finish time to measure latency */ |
337 | unsigned long r_request_started; /* start time for mds request only, |
338 | used to measure lease durations */ |
339 | |
340 | /* link unsafe requests to parent directory, for fsync */ |
341 | struct inode *r_unsafe_dir; |
342 | struct list_head r_unsafe_dir_item; |
343 | |
344 | /* unsafe requests that modify the target inode */ |
345 | struct list_head r_unsafe_target_item; |
346 | |
347 | struct ceph_mds_session *r_session; |
348 | |
349 | int r_attempts; /* resend attempts */ |
350 | int r_num_fwd; /* number of forward attempts */ |
351 | int r_resend_mds; /* mds to resend to next, if any*/ |
352 | u32 r_sent_on_mseq; /* cap mseq request was sent at*/ |
353 | u64 r_deleg_ino; |
354 | |
355 | struct list_head r_wait; |
356 | struct completion r_completion; |
357 | struct completion r_safe_completion; |
358 | ceph_mds_request_callback_t r_callback; |
359 | struct list_head r_unsafe_item; /* per-session unsafe list item */ |
360 | |
361 | long long r_dir_release_cnt; |
362 | long long r_dir_ordered_cnt; |
363 | int r_readdir_cache_idx; |
364 | |
365 | int r_feature_needed; |
366 | |
367 | struct ceph_cap_reservation r_caps_reservation; |
368 | }; |
369 | |
370 | struct ceph_pool_perm { |
371 | struct rb_node node; |
372 | int perm; |
373 | s64 pool; |
374 | size_t pool_ns_len; |
375 | char pool_ns[]; |
376 | }; |
377 | |
378 | struct ceph_snapid_map { |
379 | struct rb_node node; |
380 | struct list_head lru; |
381 | atomic_t ref; |
382 | dev_t dev; |
383 | u64 snap; |
384 | unsigned long last_used; |
385 | }; |
386 | |
387 | /* |
388 | * node for list of quotarealm inodes that are not visible from the filesystem |
389 | * mountpoint, but required to handle, e.g. quotas. |
390 | */ |
391 | struct ceph_quotarealm_inode { |
392 | struct rb_node node; |
393 | u64 ino; |
394 | unsigned long timeout; /* last time a lookup failed for this inode */ |
395 | struct mutex mutex; |
396 | struct inode *inode; |
397 | }; |
398 | |
399 | struct cap_wait { |
400 | struct list_head list; |
401 | u64 ino; |
402 | pid_t tgid; |
403 | int need; |
404 | int want; |
405 | }; |
406 | |
407 | enum { |
408 | CEPH_MDSC_STOPPING_BEGIN = 1, |
409 | CEPH_MDSC_STOPPING_FLUSHING = 2, |
410 | CEPH_MDSC_STOPPING_FLUSHED = 3, |
411 | }; |
412 | |
413 | /* |
414 | * mds client state |
415 | */ |
416 | struct ceph_mds_client { |
417 | struct ceph_fs_client *fsc; |
418 | struct mutex mutex; /* all nested structures */ |
419 | |
420 | struct ceph_mdsmap *mdsmap; |
421 | struct completion safe_umount_waiters; |
422 | wait_queue_head_t session_close_wq; |
423 | struct list_head waiting_for_map; |
424 | int mdsmap_err; |
425 | |
426 | struct ceph_mds_session **sessions; /* NULL for mds if no session */ |
427 | atomic_t num_sessions; |
428 | int max_sessions; /* len of sessions array */ |
429 | |
430 | spinlock_t stopping_lock; /* protect snap_empty */ |
431 | int stopping; /* the stage of shutting down */ |
432 | atomic_t stopping_blockers; |
433 | struct completion stopping_waiter; |
434 | |
435 | atomic64_t quotarealms_count; /* # realms with quota */ |
436 | /* |
437 | * We keep a list of inodes we don't see in the mountpoint but that we |
438 | * need to track quota realms. |
439 | */ |
440 | struct rb_root quotarealms_inodes; |
441 | struct mutex quotarealms_inodes_mutex; |
442 | |
443 | /* |
444 | * snap_rwsem will cover cap linkage into snaprealms, and |
445 | * realm snap contexts. (later, we can do per-realm snap |
446 | * contexts locks..) the empty list contains realms with no |
447 | * references (implying they contain no inodes with caps) that |
448 | * should be destroyed. |
449 | */ |
450 | u64 last_snap_seq; |
451 | struct rw_semaphore snap_rwsem; |
452 | struct rb_root snap_realms; |
453 | struct list_head snap_empty; |
454 | int num_snap_realms; |
455 | spinlock_t snap_empty_lock; /* protect snap_empty */ |
456 | |
457 | u64 last_tid; /* most recent mds request */ |
458 | u64 oldest_tid; /* oldest incomplete mds request, |
459 | excluding setfilelock requests */ |
460 | struct rb_root request_tree; /* pending mds requests */ |
461 | struct delayed_work delayed_work; /* delayed work */ |
462 | unsigned long last_renew_caps; /* last time we renewed our caps */ |
463 | struct list_head cap_delay_list; /* caps with delayed release */ |
464 | struct list_head cap_unlink_delay_list; /* caps with delayed release for unlink */ |
465 | spinlock_t cap_delay_lock; /* protects cap_delay_list and cap_unlink_delay_list */ |
466 | struct list_head snap_flush_list; /* cap_snaps ready to flush */ |
467 | spinlock_t snap_flush_lock; |
468 | |
469 | u64 last_cap_flush_tid; |
470 | struct list_head cap_flush_list; |
471 | struct list_head cap_dirty_migrating; /* ...that are migration... */ |
472 | int num_cap_flushing; /* # caps we are flushing */ |
473 | spinlock_t cap_dirty_lock; /* protects above items */ |
474 | wait_queue_head_t cap_flushing_wq; |
475 | |
476 | struct work_struct cap_reclaim_work; |
477 | atomic_t cap_reclaim_pending; |
478 | |
479 | struct work_struct cap_unlink_work; |
480 | |
481 | /* |
482 | * Cap reservations |
483 | * |
484 | * Maintain a global pool of preallocated struct ceph_caps, referenced |
485 | * by struct ceph_caps_reservations. This ensures that we preallocate |
486 | * memory needed to successfully process an MDS response. (If an MDS |
487 | * sends us cap information and we fail to process it, we will have |
488 | * problems due to the client and MDS being out of sync.) |
489 | * |
490 | * Reservations are 'owned' by a ceph_cap_reservation context. |
491 | */ |
492 | spinlock_t caps_list_lock; |
493 | struct list_head caps_list; /* unused (reserved or |
494 | unreserved) */ |
495 | struct list_head cap_wait_list; |
496 | int caps_total_count; /* total caps allocated */ |
497 | int caps_use_count; /* in use */ |
498 | int caps_use_max; /* max used caps */ |
499 | int caps_reserve_count; /* unused, reserved */ |
500 | int caps_avail_count; /* unused, unreserved */ |
501 | int caps_min_count; /* keep at least this many |
502 | (unreserved) */ |
503 | spinlock_t dentry_list_lock; |
504 | struct list_head dentry_leases; /* fifo list */ |
505 | struct list_head dentry_dir_leases; /* lru list */ |
506 | |
507 | struct ceph_client_metric metric; |
508 | |
509 | spinlock_t snapid_map_lock; |
510 | struct rb_root snapid_map_tree; |
511 | struct list_head snapid_map_lru; |
512 | |
513 | struct rw_semaphore pool_perm_rwsem; |
514 | struct rb_root pool_perm_tree; |
515 | |
516 | char nodename[__NEW_UTS_LEN + 1]; |
517 | }; |
518 | |
519 | extern const char *ceph_mds_op_name(int op); |
520 | |
521 | extern bool check_session_state(struct ceph_mds_session *s); |
522 | void inc_session_sequence(struct ceph_mds_session *s); |
523 | |
524 | extern struct ceph_mds_session * |
525 | __ceph_lookup_mds_session(struct ceph_mds_client *, int mds); |
526 | |
527 | extern const char *ceph_session_state_name(int s); |
528 | |
529 | extern struct ceph_mds_session * |
530 | ceph_get_mds_session(struct ceph_mds_session *s); |
531 | extern void ceph_put_mds_session(struct ceph_mds_session *s); |
532 | |
533 | extern int ceph_send_msg_mds(struct ceph_mds_client *mdsc, |
534 | struct ceph_msg *msg, int mds); |
535 | |
536 | extern int ceph_mdsc_init(struct ceph_fs_client *fsc); |
537 | extern void ceph_mdsc_close_sessions(struct ceph_mds_client *mdsc); |
538 | extern void ceph_mdsc_force_umount(struct ceph_mds_client *mdsc); |
539 | extern void ceph_mdsc_destroy(struct ceph_fs_client *fsc); |
540 | |
541 | extern void ceph_mdsc_sync(struct ceph_mds_client *mdsc); |
542 | |
543 | extern void ceph_invalidate_dir_request(struct ceph_mds_request *req); |
544 | extern int ceph_alloc_readdir_reply_buffer(struct ceph_mds_request *req, |
545 | struct inode *dir); |
546 | extern struct ceph_mds_request * |
547 | ceph_mdsc_create_request(struct ceph_mds_client *mdsc, int op, int mode); |
548 | extern int ceph_mdsc_submit_request(struct ceph_mds_client *mdsc, |
549 | struct inode *dir, |
550 | struct ceph_mds_request *req); |
551 | int ceph_mdsc_wait_request(struct ceph_mds_client *mdsc, |
552 | struct ceph_mds_request *req, |
553 | ceph_mds_request_wait_callback_t wait_func); |
554 | extern int ceph_mdsc_do_request(struct ceph_mds_client *mdsc, |
555 | struct inode *dir, |
556 | struct ceph_mds_request *req); |
557 | extern void ceph_mdsc_release_dir_caps(struct ceph_mds_request *req); |
558 | extern void ceph_mdsc_release_dir_caps_async(struct ceph_mds_request *req); |
559 | static inline void ceph_mdsc_get_request(struct ceph_mds_request *req) |
560 | { |
561 | kref_get(kref: &req->r_kref); |
562 | } |
563 | extern void ceph_mdsc_release_request(struct kref *kref); |
564 | static inline void ceph_mdsc_put_request(struct ceph_mds_request *req) |
565 | { |
566 | kref_put(kref: &req->r_kref, release: ceph_mdsc_release_request); |
567 | } |
568 | |
569 | extern void send_flush_mdlog(struct ceph_mds_session *s); |
570 | extern void ceph_mdsc_iterate_sessions(struct ceph_mds_client *mdsc, |
571 | void (*cb)(struct ceph_mds_session *), |
572 | bool check_state); |
573 | extern struct ceph_msg *ceph_create_session_msg(u32 op, u64 seq); |
574 | extern void __ceph_queue_cap_release(struct ceph_mds_session *session, |
575 | struct ceph_cap *cap); |
576 | extern void ceph_flush_cap_releases(struct ceph_mds_client *mdsc, |
577 | struct ceph_mds_session *session); |
578 | extern void ceph_queue_cap_reclaim_work(struct ceph_mds_client *mdsc); |
579 | extern void ceph_reclaim_caps_nr(struct ceph_mds_client *mdsc, int nr); |
580 | extern void ceph_queue_cap_unlink_work(struct ceph_mds_client *mdsc); |
581 | extern int ceph_iterate_session_caps(struct ceph_mds_session *session, |
582 | int (*cb)(struct inode *, int mds, void *), |
583 | void *arg); |
584 | extern void ceph_mdsc_pre_umount(struct ceph_mds_client *mdsc); |
585 | |
586 | static inline void ceph_mdsc_free_path(char *path, int len) |
587 | { |
588 | if (!IS_ERR_OR_NULL(ptr: path)) |
589 | __putname(path - (PATH_MAX - 1 - len)); |
590 | } |
591 | |
592 | extern char *ceph_mdsc_build_path(struct ceph_mds_client *mdsc, |
593 | struct dentry *dentry, int *plen, u64 *base, |
594 | int for_wire); |
595 | |
596 | extern void __ceph_mdsc_drop_dentry_lease(struct dentry *dentry); |
597 | extern void ceph_mdsc_lease_send_msg(struct ceph_mds_session *session, |
598 | struct dentry *dentry, char action, |
599 | u32 seq); |
600 | |
601 | extern void ceph_mdsc_handle_mdsmap(struct ceph_mds_client *mdsc, |
602 | struct ceph_msg *msg); |
603 | extern void ceph_mdsc_handle_fsmap(struct ceph_mds_client *mdsc, |
604 | struct ceph_msg *msg); |
605 | |
606 | extern struct ceph_mds_session * |
607 | ceph_mdsc_open_export_target_session(struct ceph_mds_client *mdsc, int target); |
608 | extern void ceph_mdsc_open_export_target_sessions(struct ceph_mds_client *mdsc, |
609 | struct ceph_mds_session *session); |
610 | |
611 | extern int ceph_trim_caps(struct ceph_mds_client *mdsc, |
612 | struct ceph_mds_session *session, |
613 | int max_caps); |
614 | |
615 | static inline int ceph_wait_on_async_create(struct inode *inode) |
616 | { |
617 | struct ceph_inode_info *ci = ceph_inode(inode); |
618 | |
619 | return wait_on_bit(word: &ci->i_ceph_flags, CEPH_ASYNC_CREATE_BIT, |
620 | TASK_KILLABLE); |
621 | } |
622 | |
623 | extern int ceph_wait_on_conflict_unlink(struct dentry *dentry); |
624 | extern u64 ceph_get_deleg_ino(struct ceph_mds_session *session); |
625 | extern int ceph_restore_deleg_ino(struct ceph_mds_session *session, u64 ino); |
626 | |
627 | extern bool enable_unsafe_idmap; |
628 | #endif |
629 | |