Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2f2dc053 SW |
2 | #ifndef _FS_CEPH_MDS_CLIENT_H |
3 | #define _FS_CEPH_MDS_CLIENT_H | |
4 | ||
5 | #include <linux/completion.h> | |
153c8e6b | 6 | #include <linux/kref.h> |
2f2dc053 SW |
7 | #include <linux/list.h> |
8 | #include <linux/mutex.h> | |
44ca18f2 | 9 | #include <linux/rbtree.h> |
2f2dc053 | 10 | #include <linux/spinlock.h> |
3997c01d | 11 | #include <linux/refcount.h> |
717e6f28 | 12 | #include <linux/utsname.h> |
70c94820 | 13 | #include <linux/ktime.h> |
2f2dc053 | 14 | |
3d14c5d2 YS |
15 | #include <linux/ceph/types.h> |
16 | #include <linux/ceph/messenger.h> | |
17 | #include <linux/ceph/mdsmap.h> | |
6c4a1915 | 18 | #include <linux/ceph/auth.h> |
2f2dc053 | 19 | |
f9009efa | 20 | #include "metric.h" |
3e699bd8 | 21 | #include "super.h" |
f9009efa | 22 | |
342ce182 | 23 | /* The first 8 bits are reserved for old ceph releases */ |
9ba1e224 XL |
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, | |
d4846487 | 30 | CEPHFS_FEATURE_DELEG_INO, |
18f473b3 | 31 | CEPHFS_FEATURE_METRIC_COLLECT, |
300e42a2 XL |
32 | CEPHFS_FEATURE_ALTERNATE_NAME, |
33 | CEPHFS_FEATURE_NOTIFY_SESSION_STATE, | |
d2f8bb27 | 34 | |
300e42a2 | 35 | CEPHFS_FEATURE_MAX = CEPHFS_FEATURE_NOTIFY_SESSION_STATE, |
9ba1e224 XL |
36 | }; |
37 | ||
9ba1e224 | 38 | #define CEPHFS_FEATURES_CLIENT_SUPPORTED { \ |
d2f8bb27 YZ |
39 | 0, 1, 2, 3, 4, 5, 6, 7, \ |
40 | CEPHFS_FEATURE_MIMIC, \ | |
b37fe1f9 | 41 | CEPHFS_FEATURE_REPLY_ENCODING, \ |
d2f8bb27 | 42 | CEPHFS_FEATURE_LAZY_CAP_WANTED, \ |
81c5a148 | 43 | CEPHFS_FEATURE_MULTI_RECONNECT, \ |
d4846487 | 44 | CEPHFS_FEATURE_DELEG_INO, \ |
18f473b3 | 45 | CEPHFS_FEATURE_METRIC_COLLECT, \ |
300e42a2 | 46 | CEPHFS_FEATURE_NOTIFY_SESSION_STATE, \ |
342ce182 | 47 | } |
342ce182 | 48 | |
2f2dc053 SW |
49 | /* |
50 | * Some lock dependencies: | |
51 | * | |
52 | * session->s_mutex | |
53 | * mdsc->mutex | |
54 | * | |
55 | * mdsc->snap_rwsem | |
56 | * | |
be655596 | 57 | * ci->i_ceph_lock |
2f2dc053 SW |
58 | * mdsc->snap_flush_lock |
59 | * mdsc->cap_delay_lock | |
60 | * | |
61 | */ | |
62 | ||
3d14c5d2 | 63 | struct ceph_fs_client; |
2f2dc053 SW |
64 | struct ceph_cap; |
65 | ||
66 | /* | |
67 | * parsed info about a single inode. pointers are into the encoded | |
68 | * on-wire structures within the mds reply message payload. | |
69 | */ | |
70 | struct ceph_mds_reply_info_in { | |
71 | struct ceph_mds_reply_inode *in; | |
14303d20 | 72 | struct ceph_dir_layout dir_layout; |
2f2dc053 SW |
73 | u32 symlink_len; |
74 | char *symlink; | |
75 | u32 xattr_len; | |
76 | char *xattr_data; | |
fb01d1f8 YZ |
77 | u64 inline_version; |
78 | u32 inline_len; | |
79 | char *inline_data; | |
5ea5c5e0 | 80 | u32 pool_ns_len; |
779fe0fb | 81 | char *pool_ns_data; |
fb18a575 LH |
82 | u64 max_bytes; |
83 | u64 max_files; | |
08796873 | 84 | s32 dir_pin; |
245ce991 | 85 | struct ceph_timespec btime; |
193e7b37 | 86 | struct ceph_timespec snap_btime; |
e7f72952 | 87 | u64 rsnaps; |
a35ead31 | 88 | u64 change_attr; |
2f2dc053 SW |
89 | }; |
90 | ||
2a5beea3 YZ |
91 | struct ceph_mds_reply_dir_entry { |
92 | char *name; | |
93 | u32 name_len; | |
94 | struct ceph_mds_reply_lease *lease; | |
95 | struct ceph_mds_reply_info_in inode; | |
8974eebd | 96 | loff_t offset; |
2a5beea3 YZ |
97 | }; |
98 | ||
6ddf5f16 MC |
99 | struct ceph_mds_reply_xattr { |
100 | char *xattr_value; | |
101 | size_t xattr_value_len; | |
102 | }; | |
103 | ||
2f2dc053 | 104 | /* |
25933abd HS |
105 | * parsed info about an mds reply, including information about |
106 | * either: 1) the target inode and/or its parent directory and dentry, | |
107 | * and directory contents (for readdir results), or | |
108 | * 2) the file range lock info (for fcntl F_GETLK results). | |
2f2dc053 SW |
109 | */ |
110 | struct ceph_mds_reply_info_parsed { | |
111 | struct ceph_mds_reply_head *head; | |
112 | ||
25933abd | 113 | /* trace */ |
2f2dc053 SW |
114 | struct ceph_mds_reply_info_in diri, targeti; |
115 | struct ceph_mds_reply_dirfrag *dirfrag; | |
116 | char *dname; | |
117 | u32 dname_len; | |
118 | struct ceph_mds_reply_lease *dlease; | |
6ddf5f16 | 119 | struct ceph_mds_reply_xattr xattr_info; |
2f2dc053 | 120 | |
25933abd HS |
121 | /* extra */ |
122 | union { | |
123 | /* for fcntl F_GETLK results */ | |
124 | struct ceph_filelock *filelock_reply; | |
125 | ||
126 | /* for readdir results */ | |
127 | struct { | |
128 | struct ceph_mds_reply_dirfrag *dir_dir; | |
54008399 | 129 | size_t dir_buf_size; |
25933abd | 130 | int dir_nr; |
f3c4ebe6 | 131 | bool dir_end; |
79162547 | 132 | bool dir_complete; |
f3c4ebe6 | 133 | bool hash_order; |
79162547 | 134 | bool offset_hash; |
2a5beea3 | 135 | struct ceph_mds_reply_dir_entry *dir_entries; |
25933abd | 136 | }; |
6e8575fa SL |
137 | |
138 | /* for create results */ | |
139 | struct { | |
140 | bool has_create_ino; | |
141 | u64 ino; | |
142 | }; | |
25933abd | 143 | }; |
2f2dc053 SW |
144 | |
145 | /* encoded blob describing snapshot contexts for certain | |
146 | operations (e.g., open) */ | |
147 | void *snapblob; | |
148 | int snapblob_len; | |
149 | }; | |
150 | ||
151 | ||
152 | /* | |
153 | * cap releases are batched and sent to the MDS en masse. | |
92475f05 JL |
154 | * |
155 | * Account for per-message overhead of mds_cap_release header | |
156 | * and __le32 for osd epoch barrier trailing field. | |
2f2dc053 | 157 | */ |
92475f05 | 158 | #define CEPH_CAPS_PER_RELEASE ((PAGE_SIZE - sizeof(u32) - \ |
2f2dc053 | 159 | sizeof(struct ceph_mds_cap_release)) / \ |
92475f05 | 160 | sizeof(struct ceph_mds_cap_item)) |
2f2dc053 SW |
161 | |
162 | ||
163 | /* | |
164 | * state associated with each MDS<->client session | |
165 | */ | |
166 | enum { | |
167 | CEPH_MDS_SESSION_NEW = 1, | |
168 | CEPH_MDS_SESSION_OPENING = 2, | |
169 | CEPH_MDS_SESSION_OPEN = 3, | |
170 | CEPH_MDS_SESSION_HUNG = 4, | |
7e6906c1 YZ |
171 | CEPH_MDS_SESSION_RESTARTING = 5, |
172 | CEPH_MDS_SESSION_RECONNECTING = 6, | |
173 | CEPH_MDS_SESSION_CLOSING = 7, | |
4d681c2f XL |
174 | CEPH_MDS_SESSION_CLOSED = 8, |
175 | CEPH_MDS_SESSION_REJECTED = 9, | |
2f2dc053 SW |
176 | }; |
177 | ||
178 | struct ceph_mds_session { | |
179 | struct ceph_mds_client *s_mdsc; | |
180 | int s_mds; | |
181 | int s_state; | |
182 | unsigned long s_ttl; /* time until mds kills us */ | |
84bf3950 | 183 | unsigned long s_features; |
2f2dc053 SW |
184 | u64 s_seq; /* incoming msg seq # */ |
185 | struct mutex s_mutex; /* serialize session messages */ | |
186 | ||
187 | struct ceph_connection s_con; | |
188 | ||
6c4a1915 | 189 | struct ceph_auth_handshake s_auth; |
4e7a5dcd | 190 | |
52d60f8e JL |
191 | atomic_t s_cap_gen; /* inc each time we get mds stale msg */ |
192 | unsigned long s_cap_ttl; /* when session caps expire. protected by s_mutex */ | |
d8fb02ab AE |
193 | |
194 | /* protected by s_cap_lock */ | |
195 | spinlock_t s_cap_lock; | |
045100cd | 196 | refcount_t s_ref; |
2f2dc053 | 197 | struct list_head s_caps; /* all caps issued by this session */ |
e3ec8d68 | 198 | struct ceph_cap *s_cap_iterator; |
533a2818 | 199 | int s_nr_caps; |
2f2dc053 | 200 | int s_num_cap_releases; |
99a9c273 | 201 | int s_cap_reconnect; |
03f4fcb0 | 202 | int s_readonly; |
2f2dc053 | 203 | struct list_head s_cap_releases; /* waiting cap_release messages */ |
e3ec8d68 | 204 | struct work_struct s_cap_release_work; |
2f2dc053 | 205 | |
829ad4db | 206 | /* See ceph_inode_info->i_dirty_item. */ |
1cf03a68 | 207 | struct list_head s_cap_dirty; /* inodes w/ dirty caps */ |
829ad4db JL |
208 | |
209 | /* See ceph_inode_info->i_flushing_item. */ | |
2f2dc053 | 210 | struct list_head s_cap_flushing; /* inodes w/ flushing caps */ |
1cf03a68 | 211 | |
2f2dc053 SW |
212 | unsigned long s_renew_requested; /* last time we sent a renew req */ |
213 | u64 s_renew_seq; | |
214 | ||
2f2dc053 SW |
215 | struct list_head s_waiting; /* waiting requests */ |
216 | struct list_head s_unsafe; /* unsafe requests */ | |
d4846487 | 217 | struct xarray s_delegated_inos; |
2f2dc053 SW |
218 | }; |
219 | ||
220 | /* | |
221 | * modes of choosing which MDS to send a request to | |
222 | */ | |
223 | enum { | |
224 | USE_ANY_MDS, | |
225 | USE_RANDOM_MDS, | |
226 | USE_AUTH_MDS, /* prefer authoritative mds for this metadata item */ | |
227 | }; | |
228 | ||
229 | struct ceph_mds_request; | |
230 | struct ceph_mds_client; | |
231 | ||
232 | /* | |
233 | * request completion callback | |
234 | */ | |
235 | typedef void (*ceph_mds_request_callback_t) (struct ceph_mds_client *mdsc, | |
236 | struct ceph_mds_request *req); | |
9280be24 YZ |
237 | /* |
238 | * wait for request completion callback | |
239 | */ | |
240 | typedef int (*ceph_mds_request_wait_callback_t) (struct ceph_mds_client *mdsc, | |
241 | struct ceph_mds_request *req); | |
2f2dc053 SW |
242 | |
243 | /* | |
244 | * an in-flight mds request | |
245 | */ | |
246 | struct ceph_mds_request { | |
247 | u64 r_tid; /* transaction id */ | |
44ca18f2 | 248 | struct rb_node r_node; |
37151668 | 249 | struct ceph_mds_client *r_mdsc; |
2f2dc053 | 250 | |
045100cd | 251 | struct kref r_kref; |
2f2dc053 | 252 | int r_op; /* mds op code */ |
2f2dc053 SW |
253 | |
254 | /* operation on what? */ | |
255 | struct inode *r_inode; /* arg1 */ | |
256 | struct dentry *r_dentry; /* arg1 */ | |
257 | struct dentry *r_old_dentry; /* arg2: rename from or link from */ | |
41b02e1f | 258 | struct inode *r_old_dentry_dir; /* arg2: old dentry's parent dir */ |
2f2dc053 SW |
259 | char *r_path1, *r_path2; |
260 | struct ceph_vino r_ino1, r_ino2; | |
261 | ||
3dd69aab | 262 | struct inode *r_parent; /* parent dir inode */ |
2f2dc053 SW |
263 | struct inode *r_target_inode; /* resulting inode */ |
264 | ||
bc2de10d JL |
265 | #define CEPH_MDS_R_DIRECT_IS_HASH (1) /* r_direct_hash is valid */ |
266 | #define CEPH_MDS_R_ABORTED (2) /* call was aborted */ | |
267 | #define CEPH_MDS_R_GOT_UNSAFE (3) /* got an unsafe reply */ | |
268 | #define CEPH_MDS_R_GOT_SAFE (4) /* got a safe reply */ | |
269 | #define CEPH_MDS_R_GOT_RESULT (5) /* got a result */ | |
270 | #define CEPH_MDS_R_DID_PREPOPULATE (6) /* prepopulated readdir */ | |
3dd69aab | 271 | #define CEPH_MDS_R_PARENT_LOCKED (7) /* is r_parent->i_rwsem wlocked? */ |
3bb48b41 | 272 | #define CEPH_MDS_R_ASYNC (8) /* async request */ |
bc2de10d JL |
273 | unsigned long r_req_flags; |
274 | ||
b4556396 SW |
275 | struct mutex r_fill_mutex; |
276 | ||
2f2dc053 SW |
277 | union ceph_mds_request_args r_args; |
278 | int r_fmode; /* file mode, if expecting cap */ | |
c36d6414 | 279 | int r_request_release_offset; |
9eaa7b79 | 280 | const struct cred *r_cred; |
0ed1e90a | 281 | struct timespec64 r_stamp; |
2f2dc053 SW |
282 | |
283 | /* for choosing which mds to send this request to */ | |
284 | int r_direct_mode; | |
285 | u32 r_direct_hash; /* choose dir frag based on this dentry hash */ | |
2f2dc053 SW |
286 | |
287 | /* data payload is used for xattr ops */ | |
25e6bae3 | 288 | struct ceph_pagelist *r_pagelist; |
2f2dc053 SW |
289 | |
290 | /* what caps shall we drop? */ | |
291 | int r_inode_drop, r_inode_unless; | |
292 | int r_dentry_drop, r_dentry_unless; | |
293 | int r_old_dentry_drop, r_old_dentry_unless; | |
294 | struct inode *r_old_inode; | |
295 | int r_old_inode_drop, r_old_inode_unless; | |
296 | ||
297 | struct ceph_msg *r_request; /* original request */ | |
298 | struct ceph_msg *r_reply; | |
299 | struct ceph_mds_reply_info_parsed r_reply_info; | |
300 | int r_err; | |
9eaa7b79 | 301 | u32 r_readdir_offset; |
a25949b9 JL |
302 | |
303 | struct page *r_locked_page; | |
304 | int r_dir_caps; | |
c36d6414 | 305 | int r_num_caps; |
2f2dc053 | 306 | |
a319bf56 | 307 | unsigned long r_timeout; /* optional. jiffies, 0 is "wait forever" */ |
2f2dc053 | 308 | unsigned long r_started; /* start time to measure timeout against */ |
70c94820 XL |
309 | unsigned long r_start_latency; /* start time to measure latency */ |
310 | unsigned long r_end_latency; /* finish time to measure latency */ | |
2f2dc053 SW |
311 | unsigned long r_request_started; /* start time for mds request only, |
312 | used to measure lease durations */ | |
313 | ||
314 | /* link unsafe requests to parent directory, for fsync */ | |
315 | struct inode *r_unsafe_dir; | |
316 | struct list_head r_unsafe_dir_item; | |
317 | ||
68cd5b4b YZ |
318 | /* unsafe requests that modify the target inode */ |
319 | struct list_head r_unsafe_target_item; | |
320 | ||
2f2dc053 SW |
321 | struct ceph_mds_session *r_session; |
322 | ||
323 | int r_attempts; /* resend attempts */ | |
324 | int r_num_fwd; /* number of forward attempts */ | |
2f2dc053 | 325 | int r_resend_mds; /* mds to resend to next, if any*/ |
e55b71f8 | 326 | u32 r_sent_on_mseq; /* cap mseq request was sent at*/ |
6deb8008 | 327 | u64 r_deleg_ino; |
2f2dc053 | 328 | |
2f2dc053 SW |
329 | struct list_head r_wait; |
330 | struct completion r_completion; | |
331 | struct completion r_safe_completion; | |
332 | ceph_mds_request_callback_t r_callback; | |
333 | struct list_head r_unsafe_item; /* per-session unsafe list item */ | |
2f2dc053 | 334 | |
fdd4e158 YZ |
335 | long long r_dir_release_cnt; |
336 | long long r_dir_ordered_cnt; | |
337 | int r_readdir_cache_idx; | |
2f2dc053 SW |
338 | |
339 | struct ceph_cap_reservation r_caps_reservation; | |
2f2dc053 SW |
340 | }; |
341 | ||
10183a69 YZ |
342 | struct ceph_pool_perm { |
343 | struct rb_node node; | |
10183a69 | 344 | int perm; |
7627151e | 345 | s64 pool; |
779fe0fb YZ |
346 | size_t pool_ns_len; |
347 | char pool_ns[]; | |
10183a69 YZ |
348 | }; |
349 | ||
75c9627e YZ |
350 | struct ceph_snapid_map { |
351 | struct rb_node node; | |
352 | struct list_head lru; | |
353 | atomic_t ref; | |
354 | u64 snap; | |
355 | dev_t dev; | |
356 | unsigned long last_used; | |
357 | }; | |
358 | ||
0c44a8e0 LH |
359 | /* |
360 | * node for list of quotarealm inodes that are not visible from the filesystem | |
361 | * mountpoint, but required to handle, e.g. quotas. | |
362 | */ | |
363 | struct ceph_quotarealm_inode { | |
364 | struct rb_node node; | |
365 | u64 ino; | |
366 | unsigned long timeout; /* last time a lookup failed for this inode */ | |
367 | struct mutex mutex; | |
368 | struct inode *inode; | |
369 | }; | |
370 | ||
3a3430af JL |
371 | struct cap_wait { |
372 | struct list_head list; | |
ebce3eb2 | 373 | u64 ino; |
3a3430af JL |
374 | pid_t tgid; |
375 | int need; | |
376 | int want; | |
377 | }; | |
378 | ||
2f2dc053 SW |
379 | /* |
380 | * mds client state | |
381 | */ | |
382 | struct ceph_mds_client { | |
3d14c5d2 | 383 | struct ceph_fs_client *fsc; |
2f2dc053 SW |
384 | struct mutex mutex; /* all nested structures */ |
385 | ||
386 | struct ceph_mdsmap *mdsmap; | |
f3c60c59 SW |
387 | struct completion safe_umount_waiters; |
388 | wait_queue_head_t session_close_wq; | |
2f2dc053 | 389 | struct list_head waiting_for_map; |
430afbad | 390 | int mdsmap_err; |
2f2dc053 SW |
391 | |
392 | struct ceph_mds_session **sessions; /* NULL for mds if no session */ | |
86d8f67b | 393 | atomic_t num_sessions; |
c74d79af | 394 | int max_sessions; /* len of sessions array */ |
2f2dc053 SW |
395 | int stopping; /* true if shutting down */ |
396 | ||
d557c48d | 397 | atomic64_t quotarealms_count; /* # realms with quota */ |
0c44a8e0 LH |
398 | /* |
399 | * We keep a list of inodes we don't see in the mountpoint but that we | |
400 | * need to track quota realms. | |
401 | */ | |
402 | struct rb_root quotarealms_inodes; | |
403 | struct mutex quotarealms_inodes_mutex; | |
d557c48d | 404 | |
2f2dc053 SW |
405 | /* |
406 | * snap_rwsem will cover cap linkage into snaprealms, and | |
407 | * realm snap contexts. (later, we can do per-realm snap | |
408 | * contexts locks..) the empty list contains realms with no | |
409 | * references (implying they contain no inodes with caps) that | |
410 | * should be destroyed. | |
411 | */ | |
affbc19a | 412 | u64 last_snap_seq; |
2f2dc053 | 413 | struct rw_semaphore snap_rwsem; |
a105f00c | 414 | struct rb_root snap_realms; |
2f2dc053 | 415 | struct list_head snap_empty; |
81c5a148 | 416 | int num_snap_realms; |
2f2dc053 SW |
417 | spinlock_t snap_empty_lock; /* protect snap_empty */ |
418 | ||
419 | u64 last_tid; /* most recent mds request */ | |
e8a7b8b1 YZ |
420 | u64 oldest_tid; /* oldest incomplete mds request, |
421 | excluding setfilelock requests */ | |
44ca18f2 | 422 | struct rb_root request_tree; /* pending mds requests */ |
2f2dc053 SW |
423 | struct delayed_work delayed_work; /* delayed work */ |
424 | unsigned long last_renew_caps; /* last time we renewed our caps */ | |
425 | struct list_head cap_delay_list; /* caps with delayed release */ | |
426 | spinlock_t cap_delay_lock; /* protects cap_delay_list */ | |
427 | struct list_head snap_flush_list; /* cap_snaps ready to flush */ | |
428 | spinlock_t snap_flush_lock; | |
429 | ||
553adfd9 | 430 | u64 last_cap_flush_tid; |
e4500b5e | 431 | struct list_head cap_flush_list; |
db354052 | 432 | struct list_head cap_dirty_migrating; /* ...that are migration... */ |
2f2dc053 SW |
433 | int num_cap_flushing; /* # caps we are flushing */ |
434 | spinlock_t cap_dirty_lock; /* protects above items */ | |
435 | wait_queue_head_t cap_flushing_wq; | |
436 | ||
37c4efc1 | 437 | struct work_struct cap_reclaim_work; |
fe33032d | 438 | atomic_t cap_reclaim_pending; |
37c4efc1 | 439 | |
37151668 YS |
440 | /* |
441 | * Cap reservations | |
442 | * | |
443 | * Maintain a global pool of preallocated struct ceph_caps, referenced | |
444 | * by struct ceph_caps_reservations. This ensures that we preallocate | |
445 | * memory needed to successfully process an MDS response. (If an MDS | |
446 | * sends us cap information and we fail to process it, we will have | |
447 | * problems due to the client and MDS being out of sync.) | |
448 | * | |
449 | * Reservations are 'owned' by a ceph_cap_reservation context. | |
450 | */ | |
451 | spinlock_t caps_list_lock; | |
452 | struct list_head caps_list; /* unused (reserved or | |
453 | unreserved) */ | |
3a3430af | 454 | struct list_head cap_wait_list; |
37151668 YS |
455 | int caps_total_count; /* total caps allocated */ |
456 | int caps_use_count; /* in use */ | |
fe33032d | 457 | int caps_use_max; /* max used caps */ |
37151668 YS |
458 | int caps_reserve_count; /* unused, reserved */ |
459 | int caps_avail_count; /* unused, unreserved */ | |
460 | int caps_min_count; /* keep at least this many | |
461 | (unreserved) */ | |
37c4efc1 YZ |
462 | spinlock_t dentry_list_lock; |
463 | struct list_head dentry_leases; /* fifo list */ | |
464 | struct list_head dentry_dir_leases; /* lru list */ | |
10183a69 | 465 | |
f9009efa XL |
466 | struct ceph_client_metric metric; |
467 | ||
75c9627e YZ |
468 | spinlock_t snapid_map_lock; |
469 | struct rb_root snapid_map_tree; | |
470 | struct list_head snapid_map_lru; | |
471 | ||
10183a69 YZ |
472 | struct rw_semaphore pool_perm_rwsem; |
473 | struct rb_root pool_perm_tree; | |
717e6f28 YZ |
474 | |
475 | char nodename[__NEW_UTS_LEN + 1]; | |
2f2dc053 SW |
476 | }; |
477 | ||
478 | extern const char *ceph_mds_op_name(int op); | |
479 | ||
3e699bd8 | 480 | extern bool check_session_state(struct ceph_mds_session *s); |
62575e27 | 481 | void inc_session_sequence(struct ceph_mds_session *s); |
3e699bd8 | 482 | |
2f2dc053 SW |
483 | extern struct ceph_mds_session * |
484 | __ceph_lookup_mds_session(struct ceph_mds_client *, int mds); | |
485 | ||
a687ecaf JS |
486 | extern const char *ceph_session_state_name(int s); |
487 | ||
5b3248c6 XL |
488 | extern struct ceph_mds_session * |
489 | ceph_get_mds_session(struct ceph_mds_session *s); | |
2f2dc053 SW |
490 | extern void ceph_put_mds_session(struct ceph_mds_session *s); |
491 | ||
492 | extern int ceph_send_msg_mds(struct ceph_mds_client *mdsc, | |
493 | struct ceph_msg *msg, int mds); | |
494 | ||
3d14c5d2 | 495 | extern int ceph_mdsc_init(struct ceph_fs_client *fsc); |
2f2dc053 | 496 | extern void ceph_mdsc_close_sessions(struct ceph_mds_client *mdsc); |
48fec5d0 | 497 | extern void ceph_mdsc_force_umount(struct ceph_mds_client *mdsc); |
3d14c5d2 | 498 | extern void ceph_mdsc_destroy(struct ceph_fs_client *fsc); |
2f2dc053 SW |
499 | |
500 | extern void ceph_mdsc_sync(struct ceph_mds_client *mdsc); | |
501 | ||
167c9e35 | 502 | extern void ceph_invalidate_dir_request(struct ceph_mds_request *req); |
54008399 YZ |
503 | extern int ceph_alloc_readdir_reply_buffer(struct ceph_mds_request *req, |
504 | struct inode *dir); | |
2f2dc053 SW |
505 | extern struct ceph_mds_request * |
506 | ceph_mdsc_create_request(struct ceph_mds_client *mdsc, int op, int mode); | |
86bda539 JL |
507 | extern int ceph_mdsc_submit_request(struct ceph_mds_client *mdsc, |
508 | struct inode *dir, | |
509 | struct ceph_mds_request *req); | |
9eaa7b79 JL |
510 | int ceph_mdsc_wait_request(struct ceph_mds_client *mdsc, |
511 | struct ceph_mds_request *req, | |
512 | ceph_mds_request_wait_callback_t wait_func); | |
2f2dc053 SW |
513 | extern int ceph_mdsc_do_request(struct ceph_mds_client *mdsc, |
514 | struct inode *dir, | |
515 | struct ceph_mds_request *req); | |
a25949b9 | 516 | extern void ceph_mdsc_release_dir_caps(struct ceph_mds_request *req); |
e64f44a8 | 517 | extern void ceph_mdsc_release_dir_caps_no_check(struct ceph_mds_request *req); |
2f2dc053 SW |
518 | static inline void ceph_mdsc_get_request(struct ceph_mds_request *req) |
519 | { | |
153c8e6b SW |
520 | kref_get(&req->r_kref); |
521 | } | |
522 | extern void ceph_mdsc_release_request(struct kref *kref); | |
523 | static inline void ceph_mdsc_put_request(struct ceph_mds_request *req) | |
524 | { | |
525 | kref_put(&req->r_kref, ceph_mdsc_release_request); | |
2f2dc053 | 526 | } |
2f2dc053 | 527 | |
d095559c | 528 | extern void send_flush_mdlog(struct ceph_mds_session *s); |
59b312f3 XL |
529 | extern void ceph_mdsc_iterate_sessions(struct ceph_mds_client *mdsc, |
530 | void (*cb)(struct ceph_mds_session *), | |
531 | bool check_state); | |
fba97e80 | 532 | extern struct ceph_msg *ceph_create_session_msg(u32 op, u64 seq); |
e3ec8d68 YZ |
533 | extern void __ceph_queue_cap_release(struct ceph_mds_session *session, |
534 | struct ceph_cap *cap); | |
535 | extern void ceph_flush_cap_releases(struct ceph_mds_client *mdsc, | |
536 | struct ceph_mds_session *session); | |
37c4efc1 | 537 | extern void ceph_queue_cap_reclaim_work(struct ceph_mds_client *mdsc); |
fe33032d | 538 | extern void ceph_reclaim_caps_nr(struct ceph_mds_client *mdsc, int nr); |
f5d77269 JL |
539 | extern int ceph_iterate_session_caps(struct ceph_mds_session *session, |
540 | int (*cb)(struct inode *, | |
541 | struct ceph_cap *, void *), | |
542 | void *arg); | |
2f2dc053 SW |
543 | extern void ceph_mdsc_pre_umount(struct ceph_mds_client *mdsc); |
544 | ||
f77f21bb JL |
545 | static inline void ceph_mdsc_free_path(char *path, int len) |
546 | { | |
2a575f13 | 547 | if (!IS_ERR_OR_NULL(path)) |
f77f21bb JL |
548 | __putname(path - (PATH_MAX - 1 - len)); |
549 | } | |
550 | ||
2f2dc053 SW |
551 | extern char *ceph_mdsc_build_path(struct dentry *dentry, int *plen, u64 *base, |
552 | int stop_on_nosnap); | |
553 | ||
554 | extern void __ceph_mdsc_drop_dentry_lease(struct dentry *dentry); | |
555 | extern void ceph_mdsc_lease_send_msg(struct ceph_mds_session *session, | |
2f2dc053 SW |
556 | struct dentry *dentry, char action, |
557 | u32 seq); | |
558 | ||
430afbad YZ |
559 | extern void ceph_mdsc_handle_mdsmap(struct ceph_mds_client *mdsc, |
560 | struct ceph_msg *msg); | |
561 | extern void ceph_mdsc_handle_fsmap(struct ceph_mds_client *mdsc, | |
562 | struct ceph_msg *msg); | |
2f2dc053 | 563 | |
5d72d13c YZ |
564 | extern struct ceph_mds_session * |
565 | ceph_mdsc_open_export_target_session(struct ceph_mds_client *mdsc, int target); | |
154f42c2 SW |
566 | extern void ceph_mdsc_open_export_target_sessions(struct ceph_mds_client *mdsc, |
567 | struct ceph_mds_session *session); | |
568 | ||
e30ee581 ZZ |
569 | extern int ceph_trim_caps(struct ceph_mds_client *mdsc, |
570 | struct ceph_mds_session *session, | |
571 | int max_caps); | |
d4846487 | 572 | |
891f3f5a JL |
573 | static inline int ceph_wait_on_async_create(struct inode *inode) |
574 | { | |
575 | struct ceph_inode_info *ci = ceph_inode(inode); | |
576 | ||
577 | return wait_on_bit(&ci->i_ceph_flags, CEPH_ASYNC_CREATE_BIT, | |
5e56776d | 578 | TASK_KILLABLE); |
891f3f5a | 579 | } |
d4846487 | 580 | |
4868e537 | 581 | extern int ceph_wait_on_conflict_unlink(struct dentry *dentry); |
d4846487 JL |
582 | extern u64 ceph_get_deleg_ino(struct ceph_mds_session *session); |
583 | extern int ceph_restore_deleg_ino(struct ceph_mds_session *session, u64 ino); | |
2f2dc053 | 584 | #endif |