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328970de | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
fa60ce2c | 2 | /* |
6714d8e8 KH |
3 | * dlmcommon.h |
4 | * | |
5 | * Copyright (C) 2004 Oracle. All rights reserved. | |
6714d8e8 KH |
6 | */ |
7 | ||
8 | #ifndef DLMCOMMON_H | |
9 | #define DLMCOMMON_H | |
10 | ||
11 | #include <linux/kref.h> | |
12 | ||
13 | #define DLM_HB_NODE_DOWN_PRI (0xf000000) | |
14 | #define DLM_HB_NODE_UP_PRI (0x8000000) | |
15 | ||
16 | #define DLM_LOCKID_NAME_MAX 32 | |
17 | ||
6714d8e8 | 18 | #define DLM_LOCK_RES_OWNER_UNKNOWN O2NM_MAX_NODES |
6714d8e8 | 19 | |
0467ae95 | 20 | #define DLM_HASH_SIZE_DEFAULT (1 << 17) |
c8f33b6e JB |
21 | #if DLM_HASH_SIZE_DEFAULT < PAGE_SIZE |
22 | # define DLM_HASH_PAGES 1 | |
23 | #else | |
24 | # define DLM_HASH_PAGES (DLM_HASH_SIZE_DEFAULT / PAGE_SIZE) | |
25 | #endif | |
03d864c0 DP |
26 | #define DLM_BUCKETS_PER_PAGE (PAGE_SIZE / sizeof(struct hlist_head)) |
27 | #define DLM_HASH_BUCKETS (DLM_HASH_PAGES * DLM_BUCKETS_PER_PAGE) | |
6714d8e8 | 28 | |
a3d33291 | 29 | /* Intended to make it easier for us to switch out hash functions */ |
8387ff25 | 30 | #define dlm_lockid_hash(_n, _l) full_name_hash(NULL, _n, _l) |
a3d33291 | 31 | |
751155a9 | 32 | enum dlm_mle_type { |
079ffb74 SM |
33 | DLM_MLE_BLOCK = 0, |
34 | DLM_MLE_MASTER = 1, | |
35 | DLM_MLE_MIGRATION = 2, | |
36 | DLM_MLE_NUM_TYPES = 3, | |
751155a9 SM |
37 | }; |
38 | ||
751155a9 | 39 | struct dlm_master_list_entry { |
2ed6c750 | 40 | struct hlist_node master_hash_node; |
751155a9 SM |
41 | struct list_head hb_events; |
42 | struct dlm_ctxt *dlm; | |
43 | spinlock_t spinlock; | |
44 | wait_queue_head_t wq; | |
45 | atomic_t woken; | |
46 | struct kref mle_refs; | |
47 | int inuse; | |
48 | unsigned long maybe_map[BITS_TO_LONGS(O2NM_MAX_NODES)]; | |
49 | unsigned long vote_map[BITS_TO_LONGS(O2NM_MAX_NODES)]; | |
50 | unsigned long response_map[BITS_TO_LONGS(O2NM_MAX_NODES)]; | |
51 | unsigned long node_map[BITS_TO_LONGS(O2NM_MAX_NODES)]; | |
52 | u8 master; | |
53 | u8 new_master; | |
54 | enum dlm_mle_type type; | |
55 | struct o2hb_callback_func mle_hb_up; | |
56 | struct o2hb_callback_func mle_hb_down; | |
7141514b SM |
57 | struct dlm_lock_resource *mleres; |
58 | unsigned char mname[DLM_LOCKID_NAME_MAX]; | |
59 | unsigned int mnamelen; | |
60 | unsigned int mnamehash; | |
751155a9 SM |
61 | }; |
62 | ||
6714d8e8 KH |
63 | enum dlm_ast_type { |
64 | DLM_AST = 0, | |
079ffb74 SM |
65 | DLM_BAST = 1, |
66 | DLM_ASTUNLOCK = 2, | |
6714d8e8 KH |
67 | }; |
68 | ||
69 | ||
70 | #define LKM_VALID_FLAGS (LKM_VALBLK | LKM_CONVERT | LKM_UNLOCK | \ | |
71 | LKM_CANCEL | LKM_INVVALBLK | LKM_FORCE | \ | |
72 | LKM_RECOVERY | LKM_LOCAL | LKM_NOQUEUE) | |
73 | ||
74 | #define DLM_RECOVERY_LOCK_NAME "$RECOVERY" | |
75 | #define DLM_RECOVERY_LOCK_NAME_LEN 9 | |
76 | ||
77 | static inline int dlm_is_recovery_lock(const char *lock_name, int name_len) | |
78 | { | |
79 | if (name_len == DLM_RECOVERY_LOCK_NAME_LEN && | |
80 | memcmp(lock_name, DLM_RECOVERY_LOCK_NAME, name_len)==0) | |
81 | return 1; | |
82 | return 0; | |
83 | } | |
84 | ||
466d1a45 KH |
85 | #define DLM_RECO_STATE_ACTIVE 0x0001 |
86 | #define DLM_RECO_STATE_FINALIZE 0x0002 | |
6714d8e8 KH |
87 | |
88 | struct dlm_recovery_ctxt | |
89 | { | |
90 | struct list_head resources; | |
6714d8e8 KH |
91 | struct list_head node_data; |
92 | u8 new_master; | |
93 | u8 dead_node; | |
94 | u16 state; | |
95 | unsigned long node_map[BITS_TO_LONGS(O2NM_MAX_NODES)]; | |
96 | wait_queue_head_t event; | |
97 | }; | |
98 | ||
99 | enum dlm_ctxt_state { | |
100 | DLM_CTXT_NEW = 0, | |
079ffb74 SM |
101 | DLM_CTXT_JOINED = 1, |
102 | DLM_CTXT_IN_SHUTDOWN = 2, | |
103 | DLM_CTXT_LEAVING = 3, | |
6714d8e8 KH |
104 | }; |
105 | ||
106 | struct dlm_ctxt | |
107 | { | |
108 | struct list_head list; | |
03d864c0 | 109 | struct hlist_head **lockres_hash; |
6714d8e8 KH |
110 | struct list_head dirty_list; |
111 | struct list_head purge_list; | |
112 | struct list_head pending_asts; | |
113 | struct list_head pending_basts; | |
29576f8b | 114 | struct list_head tracking_list; |
6714d8e8 KH |
115 | unsigned int purge_count; |
116 | spinlock_t spinlock; | |
117 | spinlock_t ast_lock; | |
b0d4f817 | 118 | spinlock_t track_lock; |
6714d8e8 KH |
119 | char *name; |
120 | u8 node_num; | |
121 | u32 key; | |
122 | u8 joining_node; | |
60c7ec9e | 123 | u8 migrate_done; /* set to 1 means node has migrated all lock resources */ |
6714d8e8 KH |
124 | wait_queue_head_t dlm_join_events; |
125 | unsigned long live_nodes_map[BITS_TO_LONGS(O2NM_MAX_NODES)]; | |
126 | unsigned long domain_map[BITS_TO_LONGS(O2NM_MAX_NODES)]; | |
bddefdee | 127 | unsigned long exit_domain_map[BITS_TO_LONGS(O2NM_MAX_NODES)]; |
6714d8e8 KH |
128 | unsigned long recovery_map[BITS_TO_LONGS(O2NM_MAX_NODES)]; |
129 | struct dlm_recovery_ctxt reco; | |
130 | spinlock_t master_lock; | |
e2b66ddc | 131 | struct hlist_head **master_hash; |
6714d8e8 KH |
132 | struct list_head mle_hb_events; |
133 | ||
134 | /* these give a really vague idea of the system load */ | |
2041d8fd SM |
135 | atomic_t mle_tot_count[DLM_MLE_NUM_TYPES]; |
136 | atomic_t mle_cur_count[DLM_MLE_NUM_TYPES]; | |
6800791a SM |
137 | atomic_t res_tot_count; |
138 | atomic_t res_cur_count; | |
6714d8e8 | 139 | |
6325b4a2 SM |
140 | struct dentry *dlm_debugfs_subroot; |
141 | ||
6714d8e8 KH |
142 | /* NOTE: Next three are protected by dlm_domain_lock */ |
143 | struct kref dlm_refs; | |
144 | enum dlm_ctxt_state dlm_state; | |
145 | unsigned int num_joins; | |
146 | ||
147 | struct o2hb_callback_func dlm_hb_up; | |
148 | struct o2hb_callback_func dlm_hb_down; | |
149 | struct task_struct *dlm_thread_task; | |
150 | struct task_struct *dlm_reco_thread_task; | |
3156d267 | 151 | struct workqueue_struct *dlm_worker; |
6714d8e8 KH |
152 | wait_queue_head_t dlm_thread_wq; |
153 | wait_queue_head_t dlm_reco_thread_wq; | |
154 | wait_queue_head_t ast_wq; | |
155 | wait_queue_head_t migration_wq; | |
156 | ||
157 | struct work_struct dispatched_work; | |
158 | struct list_head work_list; | |
159 | spinlock_t work_lock; | |
160 | struct list_head dlm_domain_handlers; | |
161 | struct list_head dlm_eviction_callbacks; | |
d24fbcda JB |
162 | |
163 | /* The filesystem specifies this at domain registration. We | |
164 | * cache it here to know what to tell other nodes. */ | |
165 | struct dlm_protocol_version fs_locking_proto; | |
166 | /* This is the inter-dlm communication version */ | |
167 | struct dlm_protocol_version dlm_locking_proto; | |
6714d8e8 KH |
168 | }; |
169 | ||
03d864c0 DP |
170 | static inline struct hlist_head *dlm_lockres_hash(struct dlm_ctxt *dlm, unsigned i) |
171 | { | |
172 | return dlm->lockres_hash[(i / DLM_BUCKETS_PER_PAGE) % DLM_HASH_PAGES] + (i % DLM_BUCKETS_PER_PAGE); | |
173 | } | |
174 | ||
e2b66ddc SM |
175 | static inline struct hlist_head *dlm_master_hash(struct dlm_ctxt *dlm, |
176 | unsigned i) | |
177 | { | |
178 | return dlm->master_hash[(i / DLM_BUCKETS_PER_PAGE) % DLM_HASH_PAGES] + | |
179 | (i % DLM_BUCKETS_PER_PAGE); | |
180 | } | |
181 | ||
6714d8e8 KH |
182 | /* these keventd work queue items are for less-frequently |
183 | * called functions that cannot be directly called from the | |
184 | * net message handlers for some reason, usually because | |
185 | * they need to send net messages of their own. */ | |
c4028958 | 186 | void dlm_dispatch_work(struct work_struct *work); |
6714d8e8 KH |
187 | |
188 | struct dlm_lock_resource; | |
189 | struct dlm_work_item; | |
190 | ||
191 | typedef void (dlm_workfunc_t)(struct dlm_work_item *, void *); | |
192 | ||
193 | struct dlm_request_all_locks_priv | |
194 | { | |
195 | u8 reco_master; | |
196 | u8 dead_node; | |
197 | }; | |
198 | ||
199 | struct dlm_mig_lockres_priv | |
200 | { | |
201 | struct dlm_lock_resource *lockres; | |
202 | u8 real_master; | |
52987e2a | 203 | u8 extra_ref; |
6714d8e8 KH |
204 | }; |
205 | ||
206 | struct dlm_assert_master_priv | |
207 | { | |
208 | struct dlm_lock_resource *lockres; | |
209 | u8 request_from; | |
210 | u32 flags; | |
211 | unsigned ignore_higher:1; | |
212 | }; | |
213 | ||
f3f85464 SM |
214 | struct dlm_deref_lockres_priv |
215 | { | |
216 | struct dlm_lock_resource *deref_res; | |
217 | u8 deref_node; | |
218 | }; | |
6714d8e8 KH |
219 | |
220 | struct dlm_work_item | |
221 | { | |
222 | struct list_head list; | |
223 | dlm_workfunc_t *func; | |
224 | struct dlm_ctxt *dlm; | |
225 | void *data; | |
226 | union { | |
227 | struct dlm_request_all_locks_priv ral; | |
228 | struct dlm_mig_lockres_priv ml; | |
229 | struct dlm_assert_master_priv am; | |
f3f85464 | 230 | struct dlm_deref_lockres_priv dl; |
6714d8e8 KH |
231 | } u; |
232 | }; | |
233 | ||
234 | static inline void dlm_init_work_item(struct dlm_ctxt *dlm, | |
235 | struct dlm_work_item *i, | |
236 | dlm_workfunc_t *f, void *data) | |
237 | { | |
238 | memset(i, 0, sizeof(*i)); | |
239 | i->func = f; | |
240 | INIT_LIST_HEAD(&i->list); | |
241 | i->data = data; | |
242 | i->dlm = dlm; /* must have already done a dlm_grab on this! */ | |
243 | } | |
244 | ||
245 | ||
246 | ||
247 | static inline void __dlm_set_joining_node(struct dlm_ctxt *dlm, | |
248 | u8 node) | |
249 | { | |
250 | assert_spin_locked(&dlm->spinlock); | |
251 | ||
252 | dlm->joining_node = node; | |
253 | wake_up(&dlm->dlm_join_events); | |
254 | } | |
255 | ||
256 | #define DLM_LOCK_RES_UNINITED 0x00000001 | |
257 | #define DLM_LOCK_RES_RECOVERING 0x00000002 | |
258 | #define DLM_LOCK_RES_READY 0x00000004 | |
259 | #define DLM_LOCK_RES_DIRTY 0x00000008 | |
260 | #define DLM_LOCK_RES_IN_PROGRESS 0x00000010 | |
261 | #define DLM_LOCK_RES_MIGRATING 0x00000020 | |
ba2bf218 | 262 | #define DLM_LOCK_RES_DROPPING_REF 0x00000040 |
ddc09c8d | 263 | #define DLM_LOCK_RES_BLOCK_DIRTY 0x00001000 |
3b8118cf | 264 | #define DLM_LOCK_RES_SETREF_INPROG 0x00002000 |
814ce694 | 265 | #define DLM_LOCK_RES_RECOVERY_WAITING 0x00004000 |
6714d8e8 | 266 | |
44465a7d KH |
267 | /* max milliseconds to wait to sync up a network failure with a node death */ |
268 | #define DLM_NODE_DEATH_WAIT_MAX (5 * 1000) | |
269 | ||
6714d8e8 KH |
270 | #define DLM_PURGE_INTERVAL_MS (8 * 1000) |
271 | ||
272 | struct dlm_lock_resource | |
273 | { | |
274 | /* WARNING: Please see the comment in dlm_init_lockres before | |
275 | * adding fields here. */ | |
81f2094a | 276 | struct hlist_node hash_node; |
65c491d8 | 277 | struct qstr lockname; |
6714d8e8 KH |
278 | struct kref refs; |
279 | ||
6ff06a93 KH |
280 | /* |
281 | * Please keep granted, converting, and blocked in this order, | |
282 | * as some funcs want to iterate over all lists. | |
283 | * | |
284 | * All four lists are protected by the hash's reference. | |
285 | */ | |
6714d8e8 KH |
286 | struct list_head granted; |
287 | struct list_head converting; | |
288 | struct list_head blocked; | |
6ff06a93 | 289 | struct list_head purge; |
6714d8e8 | 290 | |
6ff06a93 KH |
291 | /* |
292 | * These two lists require you to hold an additional reference | |
293 | * while they are on the list. | |
294 | */ | |
6714d8e8 KH |
295 | struct list_head dirty; |
296 | struct list_head recovering; // dlm_recovery_ctxt.resources list | |
297 | ||
29576f8b SM |
298 | /* Added during init and removed during release */ |
299 | struct list_head tracking; /* dlm->tracking_list */ | |
300 | ||
6714d8e8 KH |
301 | /* unused lock resources have their last_used stamped and are |
302 | * put on a list for the dlm thread to run. */ | |
6714d8e8 KH |
303 | unsigned long last_used; |
304 | ||
b0d4f817 SM |
305 | struct dlm_ctxt *dlm; |
306 | ||
6714d8e8 KH |
307 | unsigned migration_pending:1; |
308 | atomic_t asts_reserved; | |
309 | spinlock_t spinlock; | |
310 | wait_queue_head_t wq; | |
311 | u8 owner; //node which owns the lock resource, or unknown | |
312 | u16 state; | |
6714d8e8 | 313 | char lvb[DLM_LVB_LEN]; |
ba2bf218 | 314 | unsigned int inflight_locks; |
ac4fef4d | 315 | unsigned int inflight_assert_workers; |
ba2bf218 | 316 | unsigned long refmap[BITS_TO_LONGS(O2NM_MAX_NODES)]; |
6714d8e8 KH |
317 | }; |
318 | ||
319 | struct dlm_migratable_lock | |
320 | { | |
321 | __be64 cookie; | |
322 | ||
323 | /* these 3 are just padding for the in-memory structure, but | |
324 | * list and flags are actually used when sent over the wire */ | |
325 | __be16 pad1; | |
326 | u8 list; // 0=granted, 1=converting, 2=blocked | |
327 | u8 flags; | |
328 | ||
329 | s8 type; | |
330 | s8 convert_type; | |
331 | s8 highest_blocked; | |
332 | u8 node; | |
333 | }; // 16 bytes | |
334 | ||
335 | struct dlm_lock | |
336 | { | |
337 | struct dlm_migratable_lock ml; | |
338 | ||
339 | struct list_head list; | |
340 | struct list_head ast_list; | |
341 | struct list_head bast_list; | |
342 | struct dlm_lock_resource *lockres; | |
343 | spinlock_t spinlock; | |
344 | struct kref lock_refs; | |
345 | ||
346 | // ast and bast must be callable while holding a spinlock! | |
347 | dlm_astlockfunc_t *ast; | |
348 | dlm_bastlockfunc_t *bast; | |
349 | void *astdata; | |
350 | struct dlm_lockstatus *lksb; | |
351 | unsigned ast_pending:1, | |
352 | bast_pending:1, | |
353 | convert_pending:1, | |
354 | lock_pending:1, | |
355 | cancel_pending:1, | |
356 | unlock_pending:1, | |
357 | lksb_kernel_allocated:1; | |
358 | }; | |
359 | ||
6714d8e8 KH |
360 | enum dlm_lockres_list { |
361 | DLM_GRANTED_LIST = 0, | |
079ffb74 SM |
362 | DLM_CONVERTING_LIST = 1, |
363 | DLM_BLOCKED_LIST = 2, | |
6714d8e8 KH |
364 | }; |
365 | ||
8bc674cb KH |
366 | static inline int dlm_lvb_is_empty(char *lvb) |
367 | { | |
368 | int i; | |
369 | for (i=0; i<DLM_LVB_LEN; i++) | |
370 | if (lvb[i]) | |
371 | return 0; | |
372 | return 1; | |
373 | } | |
374 | ||
9f62e960 SM |
375 | static inline char *dlm_list_in_text(enum dlm_lockres_list idx) |
376 | { | |
377 | if (idx == DLM_GRANTED_LIST) | |
378 | return "granted"; | |
379 | else if (idx == DLM_CONVERTING_LIST) | |
380 | return "converting"; | |
381 | else if (idx == DLM_BLOCKED_LIST) | |
382 | return "blocked"; | |
383 | else | |
384 | return "unknown"; | |
385 | } | |
386 | ||
6714d8e8 KH |
387 | static inline struct list_head * |
388 | dlm_list_idx_to_ptr(struct dlm_lock_resource *res, enum dlm_lockres_list idx) | |
389 | { | |
390 | struct list_head *ret = NULL; | |
391 | if (idx == DLM_GRANTED_LIST) | |
392 | ret = &res->granted; | |
393 | else if (idx == DLM_CONVERTING_LIST) | |
394 | ret = &res->converting; | |
395 | else if (idx == DLM_BLOCKED_LIST) | |
396 | ret = &res->blocked; | |
397 | else | |
398 | BUG(); | |
399 | return ret; | |
400 | } | |
401 | ||
402 | ||
403 | ||
404 | ||
405 | struct dlm_node_iter | |
406 | { | |
407 | unsigned long node_map[BITS_TO_LONGS(O2NM_MAX_NODES)]; | |
408 | int curnode; | |
409 | }; | |
410 | ||
411 | ||
412 | enum { | |
079ffb74 SM |
413 | DLM_MASTER_REQUEST_MSG = 500, |
414 | DLM_UNUSED_MSG1 = 501, | |
415 | DLM_ASSERT_MASTER_MSG = 502, | |
416 | DLM_CREATE_LOCK_MSG = 503, | |
417 | DLM_CONVERT_LOCK_MSG = 504, | |
418 | DLM_PROXY_AST_MSG = 505, | |
419 | DLM_UNLOCK_LOCK_MSG = 506, | |
420 | DLM_DEREF_LOCKRES_MSG = 507, | |
421 | DLM_MIGRATE_REQUEST_MSG = 508, | |
422 | DLM_MIG_LOCKRES_MSG = 509, | |
423 | DLM_QUERY_JOIN_MSG = 510, | |
424 | DLM_ASSERT_JOINED_MSG = 511, | |
425 | DLM_CANCEL_JOIN_MSG = 512, | |
426 | DLM_EXIT_DOMAIN_MSG = 513, | |
427 | DLM_MASTER_REQUERY_MSG = 514, | |
428 | DLM_LOCK_REQUEST_MSG = 515, | |
429 | DLM_RECO_DATA_DONE_MSG = 516, | |
430 | DLM_BEGIN_RECO_MSG = 517, | |
431 | DLM_FINALIZE_RECO_MSG = 518, | |
432 | DLM_QUERY_REGION = 519, | |
433 | DLM_QUERY_NODEINFO = 520, | |
bddefdee | 434 | DLM_BEGIN_EXIT_DOMAIN_MSG = 521, |
60d663cb | 435 | DLM_DEREF_LOCKRES_DONE = 522, |
6714d8e8 KH |
436 | }; |
437 | ||
438 | struct dlm_reco_node_data | |
439 | { | |
440 | int state; | |
441 | u8 node_num; | |
442 | struct list_head list; | |
443 | }; | |
444 | ||
445 | enum { | |
446 | DLM_RECO_NODE_DATA_DEAD = -1, | |
447 | DLM_RECO_NODE_DATA_INIT = 0, | |
079ffb74 SM |
448 | DLM_RECO_NODE_DATA_REQUESTING = 1, |
449 | DLM_RECO_NODE_DATA_REQUESTED = 2, | |
450 | DLM_RECO_NODE_DATA_RECEIVING = 3, | |
451 | DLM_RECO_NODE_DATA_DONE = 4, | |
452 | DLM_RECO_NODE_DATA_FINALIZE_SENT = 5, | |
6714d8e8 KH |
453 | }; |
454 | ||
455 | ||
456 | enum { | |
457 | DLM_MASTER_RESP_NO = 0, | |
079ffb74 SM |
458 | DLM_MASTER_RESP_YES = 1, |
459 | DLM_MASTER_RESP_MAYBE = 2, | |
460 | DLM_MASTER_RESP_ERROR = 3, | |
6714d8e8 KH |
461 | }; |
462 | ||
463 | ||
464 | struct dlm_master_request | |
465 | { | |
466 | u8 node_idx; | |
467 | u8 namelen; | |
468 | __be16 pad1; | |
469 | __be32 flags; | |
470 | ||
471 | u8 name[O2NM_MAX_NAME_LEN]; | |
472 | }; | |
473 | ||
ba2bf218 KH |
474 | #define DLM_ASSERT_RESPONSE_REASSERT 0x00000001 |
475 | #define DLM_ASSERT_RESPONSE_MASTERY_REF 0x00000002 | |
476 | ||
6714d8e8 KH |
477 | #define DLM_ASSERT_MASTER_MLE_CLEANUP 0x00000001 |
478 | #define DLM_ASSERT_MASTER_REQUERY 0x00000002 | |
479 | #define DLM_ASSERT_MASTER_FINISH_MIGRATION 0x00000004 | |
480 | struct dlm_assert_master | |
481 | { | |
482 | u8 node_idx; | |
483 | u8 namelen; | |
484 | __be16 pad1; | |
485 | __be32 flags; | |
486 | ||
487 | u8 name[O2NM_MAX_NAME_LEN]; | |
488 | }; | |
489 | ||
ba2bf218 KH |
490 | #define DLM_MIGRATE_RESPONSE_MASTERY_REF 0x00000001 |
491 | ||
6714d8e8 KH |
492 | struct dlm_migrate_request |
493 | { | |
494 | u8 master; | |
495 | u8 new_master; | |
496 | u8 namelen; | |
497 | u8 pad1; | |
498 | __be32 pad2; | |
499 | u8 name[O2NM_MAX_NAME_LEN]; | |
500 | }; | |
501 | ||
502 | struct dlm_master_requery | |
503 | { | |
504 | u8 pad1; | |
505 | u8 pad2; | |
506 | u8 node_idx; | |
507 | u8 namelen; | |
508 | __be32 pad3; | |
509 | u8 name[O2NM_MAX_NAME_LEN]; | |
510 | }; | |
511 | ||
512 | #define DLM_MRES_RECOVERY 0x01 | |
513 | #define DLM_MRES_MIGRATION 0x02 | |
514 | #define DLM_MRES_ALL_DONE 0x04 | |
515 | ||
516 | /* | |
517 | * We would like to get one whole lockres into a single network | |
518 | * message whenever possible. Generally speaking, there will be | |
519 | * at most one dlm_lock on a lockres for each node in the cluster, | |
520 | * plus (infrequently) any additional locks coming in from userdlm. | |
521 | * | |
522 | * struct _dlm_lockres_page | |
523 | * { | |
524 | * dlm_migratable_lockres mres; | |
525 | * dlm_migratable_lock ml[DLM_MAX_MIGRATABLE_LOCKS]; | |
526 | * u8 pad[DLM_MIG_LOCKRES_RESERVED]; | |
527 | * }; | |
528 | * | |
529 | * from ../cluster/tcp.h | |
39b29af0 | 530 | * O2NET_MAX_PAYLOAD_BYTES (4096 - sizeof(net_msg)) |
6714d8e8 KH |
531 | * (roughly 4080 bytes) |
532 | * and sizeof(dlm_migratable_lockres) = 112 bytes | |
533 | * and sizeof(dlm_migratable_lock) = 16 bytes | |
534 | * | |
535 | * Choosing DLM_MAX_MIGRATABLE_LOCKS=240 and | |
536 | * DLM_MIG_LOCKRES_RESERVED=128 means we have this: | |
537 | * | |
538 | * (DLM_MAX_MIGRATABLE_LOCKS * sizeof(dlm_migratable_lock)) + | |
539 | * sizeof(dlm_migratable_lockres) + DLM_MIG_LOCKRES_RESERVED = | |
540 | * NET_MAX_PAYLOAD_BYTES | |
541 | * (240 * 16) + 112 + 128 = 4080 | |
542 | * | |
543 | * So a lockres would need more than 240 locks before it would | |
544 | * use more than one network packet to recover. Not too bad. | |
545 | */ | |
546 | #define DLM_MAX_MIGRATABLE_LOCKS 240 | |
547 | ||
548 | struct dlm_migratable_lockres | |
549 | { | |
550 | u8 master; | |
551 | u8 lockname_len; | |
552 | u8 num_locks; // locks sent in this structure | |
553 | u8 flags; | |
554 | __be32 total_locks; // locks to be sent for this migration cookie | |
555 | __be64 mig_cookie; // cookie for this lockres migration | |
556 | // or zero if not needed | |
557 | // 16 bytes | |
558 | u8 lockname[DLM_LOCKID_NAME_MAX]; | |
559 | // 48 bytes | |
560 | u8 lvb[DLM_LVB_LEN]; | |
561 | // 112 bytes | |
8cb92435 | 562 | struct dlm_migratable_lock ml[]; // 16 bytes each, begins at byte 112 |
6714d8e8 KH |
563 | }; |
564 | #define DLM_MIG_LOCKRES_MAX_LEN \ | |
565 | (sizeof(struct dlm_migratable_lockres) + \ | |
566 | (sizeof(struct dlm_migratable_lock) * \ | |
567 | DLM_MAX_MIGRATABLE_LOCKS) ) | |
568 | ||
569 | /* from above, 128 bytes | |
570 | * for some undetermined future use */ | |
39b29af0 | 571 | #define DLM_MIG_LOCKRES_RESERVED (O2NET_MAX_PAYLOAD_BYTES - \ |
6714d8e8 KH |
572 | DLM_MIG_LOCKRES_MAX_LEN) |
573 | ||
574 | struct dlm_create_lock | |
575 | { | |
576 | __be64 cookie; | |
577 | ||
578 | __be32 flags; | |
579 | u8 pad1; | |
580 | u8 node_idx; | |
581 | s8 requested_type; | |
582 | u8 namelen; | |
583 | ||
584 | u8 name[O2NM_MAX_NAME_LEN]; | |
585 | }; | |
586 | ||
587 | struct dlm_convert_lock | |
588 | { | |
589 | __be64 cookie; | |
590 | ||
591 | __be32 flags; | |
592 | u8 pad1; | |
593 | u8 node_idx; | |
594 | s8 requested_type; | |
595 | u8 namelen; | |
596 | ||
597 | u8 name[O2NM_MAX_NAME_LEN]; | |
598 | ||
8cb92435 | 599 | s8 lvb[]; |
6714d8e8 KH |
600 | }; |
601 | #define DLM_CONVERT_LOCK_MAX_LEN (sizeof(struct dlm_convert_lock)+DLM_LVB_LEN) | |
602 | ||
603 | struct dlm_unlock_lock | |
604 | { | |
605 | __be64 cookie; | |
606 | ||
607 | __be32 flags; | |
608 | __be16 pad1; | |
609 | u8 node_idx; | |
610 | u8 namelen; | |
611 | ||
612 | u8 name[O2NM_MAX_NAME_LEN]; | |
613 | ||
8cb92435 | 614 | s8 lvb[]; |
6714d8e8 KH |
615 | }; |
616 | #define DLM_UNLOCK_LOCK_MAX_LEN (sizeof(struct dlm_unlock_lock)+DLM_LVB_LEN) | |
617 | ||
618 | struct dlm_proxy_ast | |
619 | { | |
620 | __be64 cookie; | |
621 | ||
622 | __be32 flags; | |
623 | u8 node_idx; | |
624 | u8 type; | |
625 | u8 blocked_type; | |
626 | u8 namelen; | |
627 | ||
628 | u8 name[O2NM_MAX_NAME_LEN]; | |
629 | ||
8cb92435 | 630 | s8 lvb[]; |
6714d8e8 KH |
631 | }; |
632 | #define DLM_PROXY_AST_MAX_LEN (sizeof(struct dlm_proxy_ast)+DLM_LVB_LEN) | |
633 | ||
634 | #define DLM_MOD_KEY (0x666c6172) | |
d24fbcda | 635 | enum dlm_query_join_response_code { |
6714d8e8 | 636 | JOIN_DISALLOW = 0, |
079ffb74 SM |
637 | JOIN_OK = 1, |
638 | JOIN_OK_NO_MAP = 2, | |
639 | JOIN_PROTOCOL_MISMATCH = 3, | |
d24fbcda JB |
640 | }; |
641 | ||
0f71b7b4 JB |
642 | struct dlm_query_join_packet { |
643 | u8 code; /* Response code. dlm_minor and fs_minor | |
644 | are only valid if this is JOIN_OK */ | |
645 | u8 dlm_minor; /* The minor version of the protocol the | |
646 | dlm is speaking. */ | |
647 | u8 fs_minor; /* The minor version of the protocol the | |
648 | filesystem is speaking. */ | |
649 | u8 reserved; | |
650 | }; | |
651 | ||
d24fbcda | 652 | union dlm_query_join_response { |
85158410 | 653 | __be32 intval; |
0f71b7b4 | 654 | struct dlm_query_join_packet packet; |
6714d8e8 KH |
655 | }; |
656 | ||
657 | struct dlm_lock_request | |
658 | { | |
659 | u8 node_idx; | |
660 | u8 dead_node; | |
661 | __be16 pad1; | |
662 | __be32 pad2; | |
663 | }; | |
664 | ||
665 | struct dlm_reco_data_done | |
666 | { | |
667 | u8 node_idx; | |
668 | u8 dead_node; | |
669 | __be16 pad1; | |
670 | __be32 pad2; | |
671 | ||
672 | /* unused for now */ | |
673 | /* eventually we can use this to attempt | |
674 | * lvb recovery based on each node's info */ | |
675 | u8 reco_lvb[DLM_LVB_LEN]; | |
676 | }; | |
677 | ||
678 | struct dlm_begin_reco | |
679 | { | |
680 | u8 node_idx; | |
681 | u8 dead_node; | |
682 | __be16 pad1; | |
683 | __be32 pad2; | |
684 | }; | |
685 | ||
6714d8e8 KH |
686 | struct dlm_query_join_request |
687 | { | |
688 | u8 node_idx; | |
689 | u8 pad1[2]; | |
690 | u8 name_len; | |
d24fbcda JB |
691 | struct dlm_protocol_version dlm_proto; |
692 | struct dlm_protocol_version fs_proto; | |
6714d8e8 | 693 | u8 domain[O2NM_MAX_NAME_LEN]; |
1faf2894 | 694 | u8 node_map[BITS_TO_BYTES(O2NM_MAX_NODES)]; |
6714d8e8 KH |
695 | }; |
696 | ||
697 | struct dlm_assert_joined | |
698 | { | |
699 | u8 node_idx; | |
700 | u8 pad1[2]; | |
701 | u8 name_len; | |
702 | u8 domain[O2NM_MAX_NAME_LEN]; | |
703 | }; | |
704 | ||
705 | struct dlm_cancel_join | |
706 | { | |
707 | u8 node_idx; | |
708 | u8 pad1[2]; | |
709 | u8 name_len; | |
710 | u8 domain[O2NM_MAX_NAME_LEN]; | |
711 | }; | |
712 | ||
ea203441 SM |
713 | struct dlm_query_region { |
714 | u8 qr_node; | |
715 | u8 qr_numregions; | |
716 | u8 qr_namelen; | |
717 | u8 pad1; | |
718 | u8 qr_domain[O2NM_MAX_NAME_LEN]; | |
719 | u8 qr_regions[O2HB_MAX_REGION_NAME_LEN * O2NM_MAX_REGIONS]; | |
720 | }; | |
721 | ||
18cfdf1b SM |
722 | struct dlm_node_info { |
723 | u8 ni_nodenum; | |
724 | u8 pad1; | |
85158410 AV |
725 | __be16 ni_ipv4_port; |
726 | __be32 ni_ipv4_address; | |
18cfdf1b SM |
727 | }; |
728 | ||
729 | struct dlm_query_nodeinfo { | |
730 | u8 qn_nodenum; | |
731 | u8 qn_numnodes; | |
732 | u8 qn_namelen; | |
733 | u8 pad1; | |
734 | u8 qn_domain[O2NM_MAX_NAME_LEN]; | |
735 | struct dlm_node_info qn_nodes[O2NM_MAX_NODES]; | |
736 | }; | |
737 | ||
6714d8e8 KH |
738 | struct dlm_exit_domain |
739 | { | |
740 | u8 node_idx; | |
741 | u8 pad1[3]; | |
742 | }; | |
743 | ||
744 | struct dlm_finalize_reco | |
745 | { | |
746 | u8 node_idx; | |
747 | u8 dead_node; | |
466d1a45 KH |
748 | u8 flags; |
749 | u8 pad1; | |
6714d8e8 KH |
750 | __be32 pad2; |
751 | }; | |
752 | ||
ba2bf218 KH |
753 | struct dlm_deref_lockres |
754 | { | |
755 | u32 pad1; | |
756 | u16 pad2; | |
757 | u8 node_idx; | |
758 | u8 namelen; | |
759 | ||
760 | u8 name[O2NM_MAX_NAME_LEN]; | |
761 | }; | |
762 | ||
842b90b6 | 763 | enum { |
764 | DLM_DEREF_RESPONSE_DONE = 0, | |
765 | DLM_DEREF_RESPONSE_INPROG = 1, | |
766 | }; | |
767 | ||
60d663cb | 768 | struct dlm_deref_lockres_done { |
769 | u32 pad1; | |
770 | u16 pad2; | |
771 | u8 node_idx; | |
772 | u8 namelen; | |
773 | ||
774 | u8 name[O2NM_MAX_NAME_LEN]; | |
775 | }; | |
776 | ||
6714d8e8 KH |
777 | static inline enum dlm_status |
778 | __dlm_lockres_state_to_status(struct dlm_lock_resource *res) | |
779 | { | |
780 | enum dlm_status status = DLM_NORMAL; | |
781 | ||
782 | assert_spin_locked(&res->spinlock); | |
783 | ||
814ce694 JX |
784 | if (res->state & (DLM_LOCK_RES_RECOVERING| |
785 | DLM_LOCK_RES_RECOVERY_WAITING)) | |
6714d8e8 KH |
786 | status = DLM_RECOVERING; |
787 | else if (res->state & DLM_LOCK_RES_MIGRATING) | |
788 | status = DLM_MIGRATING; | |
789 | else if (res->state & DLM_LOCK_RES_IN_PROGRESS) | |
790 | status = DLM_FORWARD; | |
791 | ||
792 | return status; | |
793 | } | |
794 | ||
29004858 KH |
795 | static inline u8 dlm_get_lock_cookie_node(u64 cookie) |
796 | { | |
797 | u8 ret; | |
798 | cookie >>= 56; | |
799 | ret = (u8)(cookie & 0xffULL); | |
800 | return ret; | |
801 | } | |
802 | ||
803 | static inline unsigned long long dlm_get_lock_cookie_seq(u64 cookie) | |
804 | { | |
805 | unsigned long long ret; | |
806 | ret = ((unsigned long long)cookie) & 0x00ffffffffffffffULL; | |
807 | return ret; | |
808 | } | |
809 | ||
6714d8e8 KH |
810 | struct dlm_lock * dlm_new_lock(int type, u8 node, u64 cookie, |
811 | struct dlm_lockstatus *lksb); | |
812 | void dlm_lock_get(struct dlm_lock *lock); | |
813 | void dlm_lock_put(struct dlm_lock *lock); | |
814 | ||
815 | void dlm_lock_attach_lockres(struct dlm_lock *lock, | |
816 | struct dlm_lock_resource *res); | |
817 | ||
d74c9803 KH |
818 | int dlm_create_lock_handler(struct o2net_msg *msg, u32 len, void *data, |
819 | void **ret_data); | |
820 | int dlm_convert_lock_handler(struct o2net_msg *msg, u32 len, void *data, | |
821 | void **ret_data); | |
822 | int dlm_proxy_ast_handler(struct o2net_msg *msg, u32 len, void *data, | |
823 | void **ret_data); | |
6714d8e8 KH |
824 | |
825 | void dlm_revert_pending_convert(struct dlm_lock_resource *res, | |
826 | struct dlm_lock *lock); | |
827 | void dlm_revert_pending_lock(struct dlm_lock_resource *res, | |
828 | struct dlm_lock *lock); | |
829 | ||
d74c9803 KH |
830 | int dlm_unlock_lock_handler(struct o2net_msg *msg, u32 len, void *data, |
831 | void **ret_data); | |
6714d8e8 KH |
832 | void dlm_commit_pending_cancel(struct dlm_lock_resource *res, |
833 | struct dlm_lock *lock); | |
834 | void dlm_commit_pending_unlock(struct dlm_lock_resource *res, | |
835 | struct dlm_lock *lock); | |
836 | ||
837 | int dlm_launch_thread(struct dlm_ctxt *dlm); | |
838 | void dlm_complete_thread(struct dlm_ctxt *dlm); | |
839 | int dlm_launch_recovery_thread(struct dlm_ctxt *dlm); | |
840 | void dlm_complete_recovery_thread(struct dlm_ctxt *dlm); | |
841 | void dlm_wait_for_recovery(struct dlm_ctxt *dlm); | |
c03872f5 | 842 | void dlm_kick_recovery_thread(struct dlm_ctxt *dlm); |
e2faea4c | 843 | int dlm_is_node_dead(struct dlm_ctxt *dlm, u8 node); |
ed8625c6 SM |
844 | void dlm_wait_for_node_death(struct dlm_ctxt *dlm, u8 node, int timeout); |
845 | void dlm_wait_for_node_recovery(struct dlm_ctxt *dlm, u8 node, int timeout); | |
6714d8e8 KH |
846 | |
847 | void dlm_put(struct dlm_ctxt *dlm); | |
848 | struct dlm_ctxt *dlm_grab(struct dlm_ctxt *dlm); | |
849 | int dlm_domain_fully_joined(struct dlm_ctxt *dlm); | |
850 | ||
851 | void __dlm_lockres_calc_usage(struct dlm_ctxt *dlm, | |
852 | struct dlm_lock_resource *res); | |
853 | void dlm_lockres_calc_usage(struct dlm_ctxt *dlm, | |
854 | struct dlm_lock_resource *res); | |
95c4f581 MF |
855 | static inline void dlm_lockres_get(struct dlm_lock_resource *res) |
856 | { | |
857 | /* This is called on every lookup, so it might be worth | |
858 | * inlining. */ | |
859 | kref_get(&res->refs); | |
860 | } | |
6714d8e8 | 861 | void dlm_lockres_put(struct dlm_lock_resource *res); |
e9f0b6a6 SM |
862 | void __dlm_unhash_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res); |
863 | void __dlm_insert_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res); | |
ba2bf218 KH |
864 | struct dlm_lock_resource * __dlm_lookup_lockres_full(struct dlm_ctxt *dlm, |
865 | const char *name, | |
866 | unsigned int len, | |
867 | unsigned int hash); | |
6714d8e8 KH |
868 | struct dlm_lock_resource * __dlm_lookup_lockres(struct dlm_ctxt *dlm, |
869 | const char *name, | |
a3d33291 MF |
870 | unsigned int len, |
871 | unsigned int hash); | |
6714d8e8 KH |
872 | struct dlm_lock_resource * dlm_lookup_lockres(struct dlm_ctxt *dlm, |
873 | const char *name, | |
874 | unsigned int len); | |
875 | ||
876 | int dlm_is_host_down(int errno); | |
7d62a978 | 877 | |
6714d8e8 KH |
878 | struct dlm_lock_resource * dlm_get_lock_resource(struct dlm_ctxt *dlm, |
879 | const char *lockid, | |
3384f3df | 880 | int namelen, |
6714d8e8 KH |
881 | int flags); |
882 | struct dlm_lock_resource *dlm_new_lockres(struct dlm_ctxt *dlm, | |
883 | const char *name, | |
884 | unsigned int namelen); | |
885 | ||
8d400b81 SM |
886 | void dlm_lockres_set_refmap_bit(struct dlm_ctxt *dlm, |
887 | struct dlm_lock_resource *res, int bit); | |
888 | void dlm_lockres_clear_refmap_bit(struct dlm_ctxt *dlm, | |
889 | struct dlm_lock_resource *res, int bit); | |
890 | ||
891 | void dlm_lockres_drop_inflight_ref(struct dlm_ctxt *dlm, | |
892 | struct dlm_lock_resource *res); | |
893 | void dlm_lockres_grab_inflight_ref(struct dlm_ctxt *dlm, | |
894 | struct dlm_lock_resource *res); | |
ba2bf218 | 895 | |
ac4fef4d X |
896 | void __dlm_lockres_grab_inflight_worker(struct dlm_ctxt *dlm, |
897 | struct dlm_lock_resource *res); | |
898 | ||
6714d8e8 | 899 | void dlm_queue_ast(struct dlm_ctxt *dlm, struct dlm_lock *lock); |
d9ef7522 WW |
900 | void __dlm_queue_ast(struct dlm_ctxt *dlm, struct dlm_lock *lock); |
901 | void __dlm_queue_bast(struct dlm_ctxt *dlm, struct dlm_lock *lock); | |
6714d8e8 KH |
902 | void dlm_do_local_ast(struct dlm_ctxt *dlm, |
903 | struct dlm_lock_resource *res, | |
904 | struct dlm_lock *lock); | |
905 | int dlm_do_remote_ast(struct dlm_ctxt *dlm, | |
906 | struct dlm_lock_resource *res, | |
907 | struct dlm_lock *lock); | |
908 | void dlm_do_local_bast(struct dlm_ctxt *dlm, | |
909 | struct dlm_lock_resource *res, | |
910 | struct dlm_lock *lock, | |
911 | int blocked_type); | |
912 | int dlm_send_proxy_ast_msg(struct dlm_ctxt *dlm, | |
913 | struct dlm_lock_resource *res, | |
914 | struct dlm_lock *lock, | |
915 | int msg_type, | |
916 | int blocked_type, int flags); | |
917 | static inline int dlm_send_proxy_bast(struct dlm_ctxt *dlm, | |
918 | struct dlm_lock_resource *res, | |
919 | struct dlm_lock *lock, | |
920 | int blocked_type) | |
921 | { | |
922 | return dlm_send_proxy_ast_msg(dlm, res, lock, DLM_BAST, | |
923 | blocked_type, 0); | |
924 | } | |
925 | ||
926 | static inline int dlm_send_proxy_ast(struct dlm_ctxt *dlm, | |
927 | struct dlm_lock_resource *res, | |
928 | struct dlm_lock *lock, | |
929 | int flags) | |
930 | { | |
931 | return dlm_send_proxy_ast_msg(dlm, res, lock, DLM_AST, | |
932 | 0, flags); | |
933 | } | |
934 | ||
935 | void dlm_print_one_lock_resource(struct dlm_lock_resource *res); | |
936 | void __dlm_print_one_lock_resource(struct dlm_lock_resource *res); | |
937 | ||
6714d8e8 KH |
938 | void dlm_kick_thread(struct dlm_ctxt *dlm, struct dlm_lock_resource *res); |
939 | void __dlm_dirty_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res); | |
940 | ||
941 | ||
6714d8e8 KH |
942 | void dlm_hb_node_down_cb(struct o2nm_node *node, int idx, void *data); |
943 | void dlm_hb_node_up_cb(struct o2nm_node *node, int idx, void *data); | |
944 | ||
ba2bf218 | 945 | int dlm_empty_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res); |
6714d8e8 KH |
946 | int dlm_finish_migration(struct dlm_ctxt *dlm, |
947 | struct dlm_lock_resource *res, | |
948 | u8 old_master); | |
949 | void dlm_lockres_release_ast(struct dlm_ctxt *dlm, | |
950 | struct dlm_lock_resource *res); | |
951 | void __dlm_lockres_reserve_ast(struct dlm_lock_resource *res); | |
952 | ||
d74c9803 KH |
953 | int dlm_master_request_handler(struct o2net_msg *msg, u32 len, void *data, |
954 | void **ret_data); | |
955 | int dlm_assert_master_handler(struct o2net_msg *msg, u32 len, void *data, | |
956 | void **ret_data); | |
3b8118cf | 957 | void dlm_assert_master_post_handler(int status, void *data, void *ret_data); |
d74c9803 KH |
958 | int dlm_deref_lockres_handler(struct o2net_msg *msg, u32 len, void *data, |
959 | void **ret_data); | |
60d663cb | 960 | int dlm_deref_lockres_done_handler(struct o2net_msg *msg, u32 len, void *data, |
961 | void **ret_data); | |
d74c9803 KH |
962 | int dlm_migrate_request_handler(struct o2net_msg *msg, u32 len, void *data, |
963 | void **ret_data); | |
964 | int dlm_mig_lockres_handler(struct o2net_msg *msg, u32 len, void *data, | |
965 | void **ret_data); | |
966 | int dlm_master_requery_handler(struct o2net_msg *msg, u32 len, void *data, | |
967 | void **ret_data); | |
968 | int dlm_request_all_locks_handler(struct o2net_msg *msg, u32 len, void *data, | |
969 | void **ret_data); | |
970 | int dlm_reco_data_done_handler(struct o2net_msg *msg, u32 len, void *data, | |
971 | void **ret_data); | |
972 | int dlm_begin_reco_handler(struct o2net_msg *msg, u32 len, void *data, | |
973 | void **ret_data); | |
974 | int dlm_finalize_reco_handler(struct o2net_msg *msg, u32 len, void *data, | |
975 | void **ret_data); | |
c03872f5 KH |
976 | int dlm_do_master_requery(struct dlm_ctxt *dlm, struct dlm_lock_resource *res, |
977 | u8 nodenum, u8 *real_master); | |
c03872f5 | 978 | |
ee8f7fcb | 979 | void __dlm_do_purge_lockres(struct dlm_ctxt *dlm, |
980 | struct dlm_lock_resource *res); | |
6714d8e8 KH |
981 | |
982 | int dlm_dispatch_assert_master(struct dlm_ctxt *dlm, | |
983 | struct dlm_lock_resource *res, | |
984 | int ignore_higher, | |
985 | u8 request_from, | |
986 | u32 flags); | |
987 | ||
988 | ||
989 | int dlm_send_one_lockres(struct dlm_ctxt *dlm, | |
990 | struct dlm_lock_resource *res, | |
991 | struct dlm_migratable_lockres *mres, | |
992 | u8 send_to, | |
993 | u8 flags); | |
994 | void dlm_move_lockres_to_recovery_list(struct dlm_ctxt *dlm, | |
995 | struct dlm_lock_resource *res); | |
996 | ||
997 | /* will exit holding res->spinlock, but may drop in function */ | |
998 | void __dlm_wait_on_lockres_flags(struct dlm_lock_resource *res, int flags); | |
6714d8e8 KH |
999 | |
1000 | /* will exit holding res->spinlock, but may drop in function */ | |
1001 | static inline void __dlm_wait_on_lockres(struct dlm_lock_resource *res) | |
1002 | { | |
1003 | __dlm_wait_on_lockres_flags(res, (DLM_LOCK_RES_IN_PROGRESS| | |
1004 | DLM_LOCK_RES_RECOVERING| | |
814ce694 | 1005 | DLM_LOCK_RES_RECOVERY_WAITING| |
6714d8e8 KH |
1006 | DLM_LOCK_RES_MIGRATING)); |
1007 | } | |
1008 | ||
1c084577 SM |
1009 | void __dlm_unlink_mle(struct dlm_ctxt *dlm, struct dlm_master_list_entry *mle); |
1010 | void __dlm_insert_mle(struct dlm_ctxt *dlm, struct dlm_master_list_entry *mle); | |
1011 | ||
724bdca9 SM |
1012 | /* create/destroy slab caches */ |
1013 | int dlm_init_master_caches(void); | |
1014 | void dlm_destroy_master_caches(void); | |
1015 | ||
1016 | int dlm_init_lock_cache(void); | |
1017 | void dlm_destroy_lock_cache(void); | |
6714d8e8 KH |
1018 | |
1019 | int dlm_init_mle_cache(void); | |
1020 | void dlm_destroy_mle_cache(void); | |
724bdca9 | 1021 | |
6714d8e8 | 1022 | void dlm_hb_event_notify_attached(struct dlm_ctxt *dlm, int idx, int node_up); |
ba2bf218 KH |
1023 | int dlm_drop_lockres_ref(struct dlm_ctxt *dlm, |
1024 | struct dlm_lock_resource *res); | |
6714d8e8 KH |
1025 | void dlm_clean_master_list(struct dlm_ctxt *dlm, |
1026 | u8 dead_node); | |
5dad6c39 | 1027 | void dlm_force_free_mles(struct dlm_ctxt *dlm); |
6714d8e8 | 1028 | int dlm_lock_basts_flushed(struct dlm_ctxt *dlm, struct dlm_lock *lock); |
ba2bf218 | 1029 | int __dlm_lockres_has_locks(struct dlm_lock_resource *res); |
69d72b06 | 1030 | int __dlm_lockres_unused(struct dlm_lock_resource *res); |
6714d8e8 KH |
1031 | |
1032 | static inline const char * dlm_lock_mode_name(int mode) | |
1033 | { | |
1034 | switch (mode) { | |
1035 | case LKM_EXMODE: | |
1036 | return "EX"; | |
1037 | case LKM_PRMODE: | |
1038 | return "PR"; | |
1039 | case LKM_NLMODE: | |
1040 | return "NL"; | |
1041 | } | |
1042 | return "UNKNOWN"; | |
1043 | } | |
1044 | ||
1045 | ||
1046 | static inline int dlm_lock_compatible(int existing, int request) | |
1047 | { | |
1048 | /* NO_LOCK compatible with all */ | |
1049 | if (request == LKM_NLMODE || | |
1050 | existing == LKM_NLMODE) | |
1051 | return 1; | |
1052 | ||
1053 | /* EX incompatible with all non-NO_LOCK */ | |
1054 | if (request == LKM_EXMODE) | |
1055 | return 0; | |
1056 | ||
1057 | /* request must be PR, which is compatible with PR */ | |
1058 | if (existing == LKM_PRMODE) | |
1059 | return 1; | |
1060 | ||
1061 | return 0; | |
1062 | } | |
1063 | ||
1064 | static inline int dlm_lock_on_list(struct list_head *head, | |
1065 | struct dlm_lock *lock) | |
1066 | { | |
6714d8e8 KH |
1067 | struct dlm_lock *tmplock; |
1068 | ||
df53cd3b | 1069 | list_for_each_entry(tmplock, head, list) { |
6714d8e8 KH |
1070 | if (tmplock == lock) |
1071 | return 1; | |
1072 | } | |
1073 | return 0; | |
1074 | } | |
1075 | ||
1076 | ||
1077 | static inline enum dlm_status dlm_err_to_dlm_status(int err) | |
1078 | { | |
1079 | enum dlm_status ret; | |
1080 | if (err == -ENOMEM) | |
1081 | ret = DLM_SYSERR; | |
1082 | else if (err == -ETIMEDOUT || o2net_link_down(err, NULL)) | |
1083 | ret = DLM_NOLOCKMGR; | |
1084 | else if (err == -EINVAL) | |
1085 | ret = DLM_BADPARAM; | |
1086 | else if (err == -ENAMETOOLONG) | |
1087 | ret = DLM_IVBUFLEN; | |
1088 | else | |
1089 | ret = DLM_BADARGS; | |
1090 | return ret; | |
1091 | } | |
1092 | ||
1093 | ||
1094 | static inline void dlm_node_iter_init(unsigned long *map, | |
1095 | struct dlm_node_iter *iter) | |
1096 | { | |
b270f492 | 1097 | bitmap_copy(iter->node_map, map, O2NM_MAX_NODES); |
6714d8e8 KH |
1098 | iter->curnode = -1; |
1099 | } | |
1100 | ||
1101 | static inline int dlm_node_iter_next(struct dlm_node_iter *iter) | |
1102 | { | |
1103 | int bit; | |
1104 | bit = find_next_bit(iter->node_map, O2NM_MAX_NODES, iter->curnode+1); | |
1105 | if (bit >= O2NM_MAX_NODES) { | |
1106 | iter->curnode = O2NM_MAX_NODES; | |
1107 | return -ENOENT; | |
1108 | } | |
1109 | iter->curnode = bit; | |
1110 | return bit; | |
1111 | } | |
1112 | ||
7d62a978 SM |
1113 | static inline void dlm_set_lockres_owner(struct dlm_ctxt *dlm, |
1114 | struct dlm_lock_resource *res, | |
1115 | u8 owner) | |
1116 | { | |
1117 | assert_spin_locked(&res->spinlock); | |
1118 | ||
1119 | res->owner = owner; | |
1120 | } | |
6714d8e8 | 1121 | |
7d62a978 SM |
1122 | static inline void dlm_change_lockres_owner(struct dlm_ctxt *dlm, |
1123 | struct dlm_lock_resource *res, | |
1124 | u8 owner) | |
1125 | { | |
1126 | assert_spin_locked(&res->spinlock); | |
1127 | ||
1128 | if (owner != res->owner) | |
1129 | dlm_set_lockres_owner(dlm, res, owner); | |
1130 | } | |
6714d8e8 KH |
1131 | |
1132 | #endif /* DLMCOMMON_H */ |