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