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328970de | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
6714d8e8 KH |
2 | /* -*- mode: c; c-basic-offset: 8; -*- |
3 | * vim: noexpandtab sw=8 ts=8 sts=0: | |
4 | * | |
5 | * dlmcommon.h | |
6 | * | |
7 | * Copyright (C) 2004 Oracle. All rights reserved. | |
6714d8e8 KH |
8 | */ |
9 | ||
10 | #ifndef DLMCOMMON_H | |
11 | #define DLMCOMMON_H | |
12 | ||
13 | #include <linux/kref.h> | |
14 | ||
15 | #define DLM_HB_NODE_DOWN_PRI (0xf000000) | |
16 | #define DLM_HB_NODE_UP_PRI (0x8000000) | |
17 | ||
18 | #define DLM_LOCKID_NAME_MAX 32 | |
19 | ||
20 | #define DLM_DOMAIN_NAME_MAX_LEN 255 | |
21 | #define DLM_LOCK_RES_OWNER_UNKNOWN O2NM_MAX_NODES | |
22 | #define DLM_THREAD_SHUFFLE_INTERVAL 5 // flush everything every 5 passes | |
23 | #define DLM_THREAD_MS 200 // flush at least every 200 ms | |
24 | ||
0467ae95 | 25 | #define DLM_HASH_SIZE_DEFAULT (1 << 17) |
c8f33b6e JB |
26 | #if DLM_HASH_SIZE_DEFAULT < PAGE_SIZE |
27 | # define DLM_HASH_PAGES 1 | |
28 | #else | |
29 | # define DLM_HASH_PAGES (DLM_HASH_SIZE_DEFAULT / PAGE_SIZE) | |
30 | #endif | |
03d864c0 DP |
31 | #define DLM_BUCKETS_PER_PAGE (PAGE_SIZE / sizeof(struct hlist_head)) |
32 | #define DLM_HASH_BUCKETS (DLM_HASH_PAGES * DLM_BUCKETS_PER_PAGE) | |
6714d8e8 | 33 | |
a3d33291 | 34 | /* Intended to make it easier for us to switch out hash functions */ |
8387ff25 | 35 | #define dlm_lockid_hash(_n, _l) full_name_hash(NULL, _n, _l) |
a3d33291 | 36 | |
751155a9 | 37 | enum dlm_mle_type { |
079ffb74 SM |
38 | DLM_MLE_BLOCK = 0, |
39 | DLM_MLE_MASTER = 1, | |
40 | DLM_MLE_MIGRATION = 2, | |
41 | DLM_MLE_NUM_TYPES = 3, | |
751155a9 SM |
42 | }; |
43 | ||
751155a9 | 44 | struct dlm_master_list_entry { |
2ed6c750 | 45 | struct hlist_node master_hash_node; |
751155a9 SM |
46 | struct list_head hb_events; |
47 | struct dlm_ctxt *dlm; | |
48 | spinlock_t spinlock; | |
49 | wait_queue_head_t wq; | |
50 | atomic_t woken; | |
51 | struct kref mle_refs; | |
52 | int inuse; | |
53 | unsigned long maybe_map[BITS_TO_LONGS(O2NM_MAX_NODES)]; | |
54 | unsigned long vote_map[BITS_TO_LONGS(O2NM_MAX_NODES)]; | |
55 | unsigned long response_map[BITS_TO_LONGS(O2NM_MAX_NODES)]; | |
56 | unsigned long node_map[BITS_TO_LONGS(O2NM_MAX_NODES)]; | |
57 | u8 master; | |
58 | u8 new_master; | |
59 | enum dlm_mle_type type; | |
60 | struct o2hb_callback_func mle_hb_up; | |
61 | struct o2hb_callback_func mle_hb_down; | |
7141514b SM |
62 | struct dlm_lock_resource *mleres; |
63 | unsigned char mname[DLM_LOCKID_NAME_MAX]; | |
64 | unsigned int mnamelen; | |
65 | unsigned int mnamehash; | |
751155a9 SM |
66 | }; |
67 | ||
6714d8e8 KH |
68 | enum dlm_ast_type { |
69 | DLM_AST = 0, | |
079ffb74 SM |
70 | DLM_BAST = 1, |
71 | DLM_ASTUNLOCK = 2, | |
6714d8e8 KH |
72 | }; |
73 | ||
74 | ||
75 | #define LKM_VALID_FLAGS (LKM_VALBLK | LKM_CONVERT | LKM_UNLOCK | \ | |
76 | LKM_CANCEL | LKM_INVVALBLK | LKM_FORCE | \ | |
77 | LKM_RECOVERY | LKM_LOCAL | LKM_NOQUEUE) | |
78 | ||
79 | #define DLM_RECOVERY_LOCK_NAME "$RECOVERY" | |
80 | #define DLM_RECOVERY_LOCK_NAME_LEN 9 | |
81 | ||
82 | static inline int dlm_is_recovery_lock(const char *lock_name, int name_len) | |
83 | { | |
84 | if (name_len == DLM_RECOVERY_LOCK_NAME_LEN && | |
85 | memcmp(lock_name, DLM_RECOVERY_LOCK_NAME, name_len)==0) | |
86 | return 1; | |
87 | return 0; | |
88 | } | |
89 | ||
466d1a45 KH |
90 | #define DLM_RECO_STATE_ACTIVE 0x0001 |
91 | #define DLM_RECO_STATE_FINALIZE 0x0002 | |
6714d8e8 KH |
92 | |
93 | struct dlm_recovery_ctxt | |
94 | { | |
95 | struct list_head resources; | |
6714d8e8 KH |
96 | struct list_head node_data; |
97 | u8 new_master; | |
98 | u8 dead_node; | |
99 | u16 state; | |
100 | unsigned long node_map[BITS_TO_LONGS(O2NM_MAX_NODES)]; | |
101 | wait_queue_head_t event; | |
102 | }; | |
103 | ||
104 | enum dlm_ctxt_state { | |
105 | DLM_CTXT_NEW = 0, | |
079ffb74 SM |
106 | DLM_CTXT_JOINED = 1, |
107 | DLM_CTXT_IN_SHUTDOWN = 2, | |
108 | DLM_CTXT_LEAVING = 3, | |
6714d8e8 KH |
109 | }; |
110 | ||
111 | struct dlm_ctxt | |
112 | { | |
113 | struct list_head list; | |
03d864c0 | 114 | struct hlist_head **lockres_hash; |
6714d8e8 KH |
115 | struct list_head dirty_list; |
116 | struct list_head purge_list; | |
117 | struct list_head pending_asts; | |
118 | struct list_head pending_basts; | |
29576f8b | 119 | struct list_head tracking_list; |
6714d8e8 KH |
120 | unsigned int purge_count; |
121 | spinlock_t spinlock; | |
122 | spinlock_t ast_lock; | |
b0d4f817 | 123 | spinlock_t track_lock; |
6714d8e8 KH |
124 | char *name; |
125 | u8 node_num; | |
126 | u32 key; | |
127 | u8 joining_node; | |
60c7ec9e | 128 | u8 migrate_done; /* set to 1 means node has migrated all lock resources */ |
6714d8e8 KH |
129 | wait_queue_head_t dlm_join_events; |
130 | unsigned long live_nodes_map[BITS_TO_LONGS(O2NM_MAX_NODES)]; | |
131 | unsigned long domain_map[BITS_TO_LONGS(O2NM_MAX_NODES)]; | |
bddefdee | 132 | unsigned long exit_domain_map[BITS_TO_LONGS(O2NM_MAX_NODES)]; |
6714d8e8 KH |
133 | unsigned long recovery_map[BITS_TO_LONGS(O2NM_MAX_NODES)]; |
134 | struct dlm_recovery_ctxt reco; | |
135 | spinlock_t master_lock; | |
e2b66ddc | 136 | struct hlist_head **master_hash; |
6714d8e8 KH |
137 | struct list_head mle_hb_events; |
138 | ||
139 | /* these give a really vague idea of the system load */ | |
2041d8fd SM |
140 | atomic_t mle_tot_count[DLM_MLE_NUM_TYPES]; |
141 | atomic_t mle_cur_count[DLM_MLE_NUM_TYPES]; | |
6800791a SM |
142 | atomic_t res_tot_count; |
143 | atomic_t res_cur_count; | |
6714d8e8 | 144 | |
6325b4a2 SM |
145 | struct dentry *dlm_debugfs_subroot; |
146 | ||
6714d8e8 KH |
147 | /* NOTE: Next three are protected by dlm_domain_lock */ |
148 | struct kref dlm_refs; | |
149 | enum dlm_ctxt_state dlm_state; | |
150 | unsigned int num_joins; | |
151 | ||
152 | struct o2hb_callback_func dlm_hb_up; | |
153 | struct o2hb_callback_func dlm_hb_down; | |
154 | struct task_struct *dlm_thread_task; | |
155 | struct task_struct *dlm_reco_thread_task; | |
3156d267 | 156 | struct workqueue_struct *dlm_worker; |
6714d8e8 KH |
157 | wait_queue_head_t dlm_thread_wq; |
158 | wait_queue_head_t dlm_reco_thread_wq; | |
159 | wait_queue_head_t ast_wq; | |
160 | wait_queue_head_t migration_wq; | |
161 | ||
162 | struct work_struct dispatched_work; | |
163 | struct list_head work_list; | |
164 | spinlock_t work_lock; | |
165 | struct list_head dlm_domain_handlers; | |
166 | struct list_head dlm_eviction_callbacks; | |
d24fbcda JB |
167 | |
168 | /* The filesystem specifies this at domain registration. We | |
169 | * cache it here to know what to tell other nodes. */ | |
170 | struct dlm_protocol_version fs_locking_proto; | |
171 | /* This is the inter-dlm communication version */ | |
172 | struct dlm_protocol_version dlm_locking_proto; | |
6714d8e8 KH |
173 | }; |
174 | ||
03d864c0 DP |
175 | static inline struct hlist_head *dlm_lockres_hash(struct dlm_ctxt *dlm, unsigned i) |
176 | { | |
177 | return dlm->lockres_hash[(i / DLM_BUCKETS_PER_PAGE) % DLM_HASH_PAGES] + (i % DLM_BUCKETS_PER_PAGE); | |
178 | } | |
179 | ||
e2b66ddc SM |
180 | static inline struct hlist_head *dlm_master_hash(struct dlm_ctxt *dlm, |
181 | unsigned i) | |
182 | { | |
183 | return dlm->master_hash[(i / DLM_BUCKETS_PER_PAGE) % DLM_HASH_PAGES] + | |
184 | (i % DLM_BUCKETS_PER_PAGE); | |
185 | } | |
186 | ||
6714d8e8 KH |
187 | /* these keventd work queue items are for less-frequently |
188 | * called functions that cannot be directly called from the | |
189 | * net message handlers for some reason, usually because | |
190 | * they need to send net messages of their own. */ | |
c4028958 | 191 | void dlm_dispatch_work(struct work_struct *work); |
6714d8e8 KH |
192 | |
193 | struct dlm_lock_resource; | |
194 | struct dlm_work_item; | |
195 | ||
196 | typedef void (dlm_workfunc_t)(struct dlm_work_item *, void *); | |
197 | ||
198 | struct dlm_request_all_locks_priv | |
199 | { | |
200 | u8 reco_master; | |
201 | u8 dead_node; | |
202 | }; | |
203 | ||
204 | struct dlm_mig_lockres_priv | |
205 | { | |
206 | struct dlm_lock_resource *lockres; | |
207 | u8 real_master; | |
52987e2a | 208 | u8 extra_ref; |
6714d8e8 KH |
209 | }; |
210 | ||
211 | struct dlm_assert_master_priv | |
212 | { | |
213 | struct dlm_lock_resource *lockres; | |
214 | u8 request_from; | |
215 | u32 flags; | |
216 | unsigned ignore_higher:1; | |
217 | }; | |
218 | ||
f3f85464 SM |
219 | struct dlm_deref_lockres_priv |
220 | { | |
221 | struct dlm_lock_resource *deref_res; | |
222 | u8 deref_node; | |
223 | }; | |
6714d8e8 KH |
224 | |
225 | struct dlm_work_item | |
226 | { | |
227 | struct list_head list; | |
228 | dlm_workfunc_t *func; | |
229 | struct dlm_ctxt *dlm; | |
230 | void *data; | |
231 | union { | |
232 | struct dlm_request_all_locks_priv ral; | |
233 | struct dlm_mig_lockres_priv ml; | |
234 | struct dlm_assert_master_priv am; | |
f3f85464 | 235 | struct dlm_deref_lockres_priv dl; |
6714d8e8 KH |
236 | } u; |
237 | }; | |
238 | ||
239 | static inline void dlm_init_work_item(struct dlm_ctxt *dlm, | |
240 | struct dlm_work_item *i, | |
241 | dlm_workfunc_t *f, void *data) | |
242 | { | |
243 | memset(i, 0, sizeof(*i)); | |
244 | i->func = f; | |
245 | INIT_LIST_HEAD(&i->list); | |
246 | i->data = data; | |
247 | i->dlm = dlm; /* must have already done a dlm_grab on this! */ | |
248 | } | |
249 | ||
250 | ||
251 | ||
252 | static inline void __dlm_set_joining_node(struct dlm_ctxt *dlm, | |
253 | u8 node) | |
254 | { | |
255 | assert_spin_locked(&dlm->spinlock); | |
256 | ||
257 | dlm->joining_node = node; | |
258 | wake_up(&dlm->dlm_join_events); | |
259 | } | |
260 | ||
261 | #define DLM_LOCK_RES_UNINITED 0x00000001 | |
262 | #define DLM_LOCK_RES_RECOVERING 0x00000002 | |
263 | #define DLM_LOCK_RES_READY 0x00000004 | |
264 | #define DLM_LOCK_RES_DIRTY 0x00000008 | |
265 | #define DLM_LOCK_RES_IN_PROGRESS 0x00000010 | |
266 | #define DLM_LOCK_RES_MIGRATING 0x00000020 | |
ba2bf218 | 267 | #define DLM_LOCK_RES_DROPPING_REF 0x00000040 |
ddc09c8d | 268 | #define DLM_LOCK_RES_BLOCK_DIRTY 0x00001000 |
3b8118cf | 269 | #define DLM_LOCK_RES_SETREF_INPROG 0x00002000 |
814ce694 | 270 | #define DLM_LOCK_RES_RECOVERY_WAITING 0x00004000 |
6714d8e8 | 271 | |
44465a7d KH |
272 | /* max milliseconds to wait to sync up a network failure with a node death */ |
273 | #define DLM_NODE_DEATH_WAIT_MAX (5 * 1000) | |
274 | ||
6714d8e8 KH |
275 | #define DLM_PURGE_INTERVAL_MS (8 * 1000) |
276 | ||
277 | struct dlm_lock_resource | |
278 | { | |
279 | /* WARNING: Please see the comment in dlm_init_lockres before | |
280 | * adding fields here. */ | |
81f2094a | 281 | struct hlist_node hash_node; |
65c491d8 | 282 | struct qstr lockname; |
6714d8e8 KH |
283 | struct kref refs; |
284 | ||
6ff06a93 KH |
285 | /* |
286 | * Please keep granted, converting, and blocked in this order, | |
287 | * as some funcs want to iterate over all lists. | |
288 | * | |
289 | * All four lists are protected by the hash's reference. | |
290 | */ | |
6714d8e8 KH |
291 | struct list_head granted; |
292 | struct list_head converting; | |
293 | struct list_head blocked; | |
6ff06a93 | 294 | struct list_head purge; |
6714d8e8 | 295 | |
6ff06a93 KH |
296 | /* |
297 | * These two lists require you to hold an additional reference | |
298 | * while they are on the list. | |
299 | */ | |
6714d8e8 KH |
300 | struct list_head dirty; |
301 | struct list_head recovering; // dlm_recovery_ctxt.resources list | |
302 | ||
29576f8b SM |
303 | /* Added during init and removed during release */ |
304 | struct list_head tracking; /* dlm->tracking_list */ | |
305 | ||
6714d8e8 KH |
306 | /* unused lock resources have their last_used stamped and are |
307 | * put on a list for the dlm thread to run. */ | |
6714d8e8 KH |
308 | unsigned long last_used; |
309 | ||
b0d4f817 SM |
310 | struct dlm_ctxt *dlm; |
311 | ||
6714d8e8 KH |
312 | unsigned migration_pending:1; |
313 | atomic_t asts_reserved; | |
314 | spinlock_t spinlock; | |
315 | wait_queue_head_t wq; | |
316 | u8 owner; //node which owns the lock resource, or unknown | |
317 | u16 state; | |
6714d8e8 | 318 | char lvb[DLM_LVB_LEN]; |
ba2bf218 | 319 | unsigned int inflight_locks; |
ac4fef4d | 320 | unsigned int inflight_assert_workers; |
ba2bf218 | 321 | unsigned long refmap[BITS_TO_LONGS(O2NM_MAX_NODES)]; |
6714d8e8 KH |
322 | }; |
323 | ||
324 | struct dlm_migratable_lock | |
325 | { | |
326 | __be64 cookie; | |
327 | ||
328 | /* these 3 are just padding for the in-memory structure, but | |
329 | * list and flags are actually used when sent over the wire */ | |
330 | __be16 pad1; | |
331 | u8 list; // 0=granted, 1=converting, 2=blocked | |
332 | u8 flags; | |
333 | ||
334 | s8 type; | |
335 | s8 convert_type; | |
336 | s8 highest_blocked; | |
337 | u8 node; | |
338 | }; // 16 bytes | |
339 | ||
340 | struct dlm_lock | |
341 | { | |
342 | struct dlm_migratable_lock ml; | |
343 | ||
344 | struct list_head list; | |
345 | struct list_head ast_list; | |
346 | struct list_head bast_list; | |
347 | struct dlm_lock_resource *lockres; | |
348 | spinlock_t spinlock; | |
349 | struct kref lock_refs; | |
350 | ||
351 | // ast and bast must be callable while holding a spinlock! | |
352 | dlm_astlockfunc_t *ast; | |
353 | dlm_bastlockfunc_t *bast; | |
354 | void *astdata; | |
355 | struct dlm_lockstatus *lksb; | |
356 | unsigned ast_pending:1, | |
357 | bast_pending:1, | |
358 | convert_pending:1, | |
359 | lock_pending:1, | |
360 | cancel_pending:1, | |
361 | unlock_pending:1, | |
362 | lksb_kernel_allocated:1; | |
363 | }; | |
364 | ||
6714d8e8 KH |
365 | enum dlm_lockres_list { |
366 | DLM_GRANTED_LIST = 0, | |
079ffb74 SM |
367 | DLM_CONVERTING_LIST = 1, |
368 | DLM_BLOCKED_LIST = 2, | |
6714d8e8 KH |
369 | }; |
370 | ||
8bc674cb KH |
371 | static inline int dlm_lvb_is_empty(char *lvb) |
372 | { | |
373 | int i; | |
374 | for (i=0; i<DLM_LVB_LEN; i++) | |
375 | if (lvb[i]) | |
376 | return 0; | |
377 | return 1; | |
378 | } | |
379 | ||
9f62e960 SM |
380 | static inline char *dlm_list_in_text(enum dlm_lockres_list idx) |
381 | { | |
382 | if (idx == DLM_GRANTED_LIST) | |
383 | return "granted"; | |
384 | else if (idx == DLM_CONVERTING_LIST) | |
385 | return "converting"; | |
386 | else if (idx == DLM_BLOCKED_LIST) | |
387 | return "blocked"; | |
388 | else | |
389 | return "unknown"; | |
390 | } | |
391 | ||
6714d8e8 KH |
392 | static inline struct list_head * |
393 | dlm_list_idx_to_ptr(struct dlm_lock_resource *res, enum dlm_lockres_list idx) | |
394 | { | |
395 | struct list_head *ret = NULL; | |
396 | if (idx == DLM_GRANTED_LIST) | |
397 | ret = &res->granted; | |
398 | else if (idx == DLM_CONVERTING_LIST) | |
399 | ret = &res->converting; | |
400 | else if (idx == DLM_BLOCKED_LIST) | |
401 | ret = &res->blocked; | |
402 | else | |
403 | BUG(); | |
404 | return ret; | |
405 | } | |
406 | ||
407 | ||
408 | ||
409 | ||
410 | struct dlm_node_iter | |
411 | { | |
412 | unsigned long node_map[BITS_TO_LONGS(O2NM_MAX_NODES)]; | |
413 | int curnode; | |
414 | }; | |
415 | ||
416 | ||
417 | enum { | |
079ffb74 SM |
418 | DLM_MASTER_REQUEST_MSG = 500, |
419 | DLM_UNUSED_MSG1 = 501, | |
420 | DLM_ASSERT_MASTER_MSG = 502, | |
421 | DLM_CREATE_LOCK_MSG = 503, | |
422 | DLM_CONVERT_LOCK_MSG = 504, | |
423 | DLM_PROXY_AST_MSG = 505, | |
424 | DLM_UNLOCK_LOCK_MSG = 506, | |
425 | DLM_DEREF_LOCKRES_MSG = 507, | |
426 | DLM_MIGRATE_REQUEST_MSG = 508, | |
427 | DLM_MIG_LOCKRES_MSG = 509, | |
428 | DLM_QUERY_JOIN_MSG = 510, | |
429 | DLM_ASSERT_JOINED_MSG = 511, | |
430 | DLM_CANCEL_JOIN_MSG = 512, | |
431 | DLM_EXIT_DOMAIN_MSG = 513, | |
432 | DLM_MASTER_REQUERY_MSG = 514, | |
433 | DLM_LOCK_REQUEST_MSG = 515, | |
434 | DLM_RECO_DATA_DONE_MSG = 516, | |
435 | DLM_BEGIN_RECO_MSG = 517, | |
436 | DLM_FINALIZE_RECO_MSG = 518, | |
437 | DLM_QUERY_REGION = 519, | |
438 | DLM_QUERY_NODEINFO = 520, | |
bddefdee | 439 | DLM_BEGIN_EXIT_DOMAIN_MSG = 521, |
60d663cb | 440 | DLM_DEREF_LOCKRES_DONE = 522, |
6714d8e8 KH |
441 | }; |
442 | ||
443 | struct dlm_reco_node_data | |
444 | { | |
445 | int state; | |
446 | u8 node_num; | |
447 | struct list_head list; | |
448 | }; | |
449 | ||
450 | enum { | |
451 | DLM_RECO_NODE_DATA_DEAD = -1, | |
452 | DLM_RECO_NODE_DATA_INIT = 0, | |
079ffb74 SM |
453 | DLM_RECO_NODE_DATA_REQUESTING = 1, |
454 | DLM_RECO_NODE_DATA_REQUESTED = 2, | |
455 | DLM_RECO_NODE_DATA_RECEIVING = 3, | |
456 | DLM_RECO_NODE_DATA_DONE = 4, | |
457 | DLM_RECO_NODE_DATA_FINALIZE_SENT = 5, | |
6714d8e8 KH |
458 | }; |
459 | ||
460 | ||
461 | enum { | |
462 | DLM_MASTER_RESP_NO = 0, | |
079ffb74 SM |
463 | DLM_MASTER_RESP_YES = 1, |
464 | DLM_MASTER_RESP_MAYBE = 2, | |
465 | DLM_MASTER_RESP_ERROR = 3, | |
6714d8e8 KH |
466 | }; |
467 | ||
468 | ||
469 | struct dlm_master_request | |
470 | { | |
471 | u8 node_idx; | |
472 | u8 namelen; | |
473 | __be16 pad1; | |
474 | __be32 flags; | |
475 | ||
476 | u8 name[O2NM_MAX_NAME_LEN]; | |
477 | }; | |
478 | ||
ba2bf218 KH |
479 | #define DLM_ASSERT_RESPONSE_REASSERT 0x00000001 |
480 | #define DLM_ASSERT_RESPONSE_MASTERY_REF 0x00000002 | |
481 | ||
6714d8e8 KH |
482 | #define DLM_ASSERT_MASTER_MLE_CLEANUP 0x00000001 |
483 | #define DLM_ASSERT_MASTER_REQUERY 0x00000002 | |
484 | #define DLM_ASSERT_MASTER_FINISH_MIGRATION 0x00000004 | |
485 | struct dlm_assert_master | |
486 | { | |
487 | u8 node_idx; | |
488 | u8 namelen; | |
489 | __be16 pad1; | |
490 | __be32 flags; | |
491 | ||
492 | u8 name[O2NM_MAX_NAME_LEN]; | |
493 | }; | |
494 | ||
ba2bf218 KH |
495 | #define DLM_MIGRATE_RESPONSE_MASTERY_REF 0x00000001 |
496 | ||
6714d8e8 KH |
497 | struct dlm_migrate_request |
498 | { | |
499 | u8 master; | |
500 | u8 new_master; | |
501 | u8 namelen; | |
502 | u8 pad1; | |
503 | __be32 pad2; | |
504 | u8 name[O2NM_MAX_NAME_LEN]; | |
505 | }; | |
506 | ||
507 | struct dlm_master_requery | |
508 | { | |
509 | u8 pad1; | |
510 | u8 pad2; | |
511 | u8 node_idx; | |
512 | u8 namelen; | |
513 | __be32 pad3; | |
514 | u8 name[O2NM_MAX_NAME_LEN]; | |
515 | }; | |
516 | ||
517 | #define DLM_MRES_RECOVERY 0x01 | |
518 | #define DLM_MRES_MIGRATION 0x02 | |
519 | #define DLM_MRES_ALL_DONE 0x04 | |
520 | ||
521 | /* | |
522 | * We would like to get one whole lockres into a single network | |
523 | * message whenever possible. Generally speaking, there will be | |
524 | * at most one dlm_lock on a lockres for each node in the cluster, | |
525 | * plus (infrequently) any additional locks coming in from userdlm. | |
526 | * | |
527 | * struct _dlm_lockres_page | |
528 | * { | |
529 | * dlm_migratable_lockres mres; | |
530 | * dlm_migratable_lock ml[DLM_MAX_MIGRATABLE_LOCKS]; | |
531 | * u8 pad[DLM_MIG_LOCKRES_RESERVED]; | |
532 | * }; | |
533 | * | |
534 | * from ../cluster/tcp.h | |
39b29af0 | 535 | * O2NET_MAX_PAYLOAD_BYTES (4096 - sizeof(net_msg)) |
6714d8e8 KH |
536 | * (roughly 4080 bytes) |
537 | * and sizeof(dlm_migratable_lockres) = 112 bytes | |
538 | * and sizeof(dlm_migratable_lock) = 16 bytes | |
539 | * | |
540 | * Choosing DLM_MAX_MIGRATABLE_LOCKS=240 and | |
541 | * DLM_MIG_LOCKRES_RESERVED=128 means we have this: | |
542 | * | |
543 | * (DLM_MAX_MIGRATABLE_LOCKS * sizeof(dlm_migratable_lock)) + | |
544 | * sizeof(dlm_migratable_lockres) + DLM_MIG_LOCKRES_RESERVED = | |
545 | * NET_MAX_PAYLOAD_BYTES | |
546 | * (240 * 16) + 112 + 128 = 4080 | |
547 | * | |
548 | * So a lockres would need more than 240 locks before it would | |
549 | * use more than one network packet to recover. Not too bad. | |
550 | */ | |
551 | #define DLM_MAX_MIGRATABLE_LOCKS 240 | |
552 | ||
553 | struct dlm_migratable_lockres | |
554 | { | |
555 | u8 master; | |
556 | u8 lockname_len; | |
557 | u8 num_locks; // locks sent in this structure | |
558 | u8 flags; | |
559 | __be32 total_locks; // locks to be sent for this migration cookie | |
560 | __be64 mig_cookie; // cookie for this lockres migration | |
561 | // or zero if not needed | |
562 | // 16 bytes | |
563 | u8 lockname[DLM_LOCKID_NAME_MAX]; | |
564 | // 48 bytes | |
565 | u8 lvb[DLM_LVB_LEN]; | |
566 | // 112 bytes | |
567 | struct dlm_migratable_lock ml[0]; // 16 bytes each, begins at byte 112 | |
568 | }; | |
569 | #define DLM_MIG_LOCKRES_MAX_LEN \ | |
570 | (sizeof(struct dlm_migratable_lockres) + \ | |
571 | (sizeof(struct dlm_migratable_lock) * \ | |
572 | DLM_MAX_MIGRATABLE_LOCKS) ) | |
573 | ||
574 | /* from above, 128 bytes | |
575 | * for some undetermined future use */ | |
39b29af0 | 576 | #define DLM_MIG_LOCKRES_RESERVED (O2NET_MAX_PAYLOAD_BYTES - \ |
6714d8e8 KH |
577 | DLM_MIG_LOCKRES_MAX_LEN) |
578 | ||
579 | struct dlm_create_lock | |
580 | { | |
581 | __be64 cookie; | |
582 | ||
583 | __be32 flags; | |
584 | u8 pad1; | |
585 | u8 node_idx; | |
586 | s8 requested_type; | |
587 | u8 namelen; | |
588 | ||
589 | u8 name[O2NM_MAX_NAME_LEN]; | |
590 | }; | |
591 | ||
592 | struct dlm_convert_lock | |
593 | { | |
594 | __be64 cookie; | |
595 | ||
596 | __be32 flags; | |
597 | u8 pad1; | |
598 | u8 node_idx; | |
599 | s8 requested_type; | |
600 | u8 namelen; | |
601 | ||
602 | u8 name[O2NM_MAX_NAME_LEN]; | |
603 | ||
604 | s8 lvb[0]; | |
605 | }; | |
606 | #define DLM_CONVERT_LOCK_MAX_LEN (sizeof(struct dlm_convert_lock)+DLM_LVB_LEN) | |
607 | ||
608 | struct dlm_unlock_lock | |
609 | { | |
610 | __be64 cookie; | |
611 | ||
612 | __be32 flags; | |
613 | __be16 pad1; | |
614 | u8 node_idx; | |
615 | u8 namelen; | |
616 | ||
617 | u8 name[O2NM_MAX_NAME_LEN]; | |
618 | ||
619 | s8 lvb[0]; | |
620 | }; | |
621 | #define DLM_UNLOCK_LOCK_MAX_LEN (sizeof(struct dlm_unlock_lock)+DLM_LVB_LEN) | |
622 | ||
623 | struct dlm_proxy_ast | |
624 | { | |
625 | __be64 cookie; | |
626 | ||
627 | __be32 flags; | |
628 | u8 node_idx; | |
629 | u8 type; | |
630 | u8 blocked_type; | |
631 | u8 namelen; | |
632 | ||
633 | u8 name[O2NM_MAX_NAME_LEN]; | |
634 | ||
635 | s8 lvb[0]; | |
636 | }; | |
637 | #define DLM_PROXY_AST_MAX_LEN (sizeof(struct dlm_proxy_ast)+DLM_LVB_LEN) | |
638 | ||
639 | #define DLM_MOD_KEY (0x666c6172) | |
d24fbcda | 640 | enum dlm_query_join_response_code { |
6714d8e8 | 641 | JOIN_DISALLOW = 0, |
079ffb74 SM |
642 | JOIN_OK = 1, |
643 | JOIN_OK_NO_MAP = 2, | |
644 | JOIN_PROTOCOL_MISMATCH = 3, | |
d24fbcda JB |
645 | }; |
646 | ||
0f71b7b4 JB |
647 | struct dlm_query_join_packet { |
648 | u8 code; /* Response code. dlm_minor and fs_minor | |
649 | are only valid if this is JOIN_OK */ | |
650 | u8 dlm_minor; /* The minor version of the protocol the | |
651 | dlm is speaking. */ | |
652 | u8 fs_minor; /* The minor version of the protocol the | |
653 | filesystem is speaking. */ | |
654 | u8 reserved; | |
655 | }; | |
656 | ||
d24fbcda | 657 | union dlm_query_join_response { |
85158410 | 658 | __be32 intval; |
0f71b7b4 | 659 | struct dlm_query_join_packet packet; |
6714d8e8 KH |
660 | }; |
661 | ||
662 | struct dlm_lock_request | |
663 | { | |
664 | u8 node_idx; | |
665 | u8 dead_node; | |
666 | __be16 pad1; | |
667 | __be32 pad2; | |
668 | }; | |
669 | ||
670 | struct dlm_reco_data_done | |
671 | { | |
672 | u8 node_idx; | |
673 | u8 dead_node; | |
674 | __be16 pad1; | |
675 | __be32 pad2; | |
676 | ||
677 | /* unused for now */ | |
678 | /* eventually we can use this to attempt | |
679 | * lvb recovery based on each node's info */ | |
680 | u8 reco_lvb[DLM_LVB_LEN]; | |
681 | }; | |
682 | ||
683 | struct dlm_begin_reco | |
684 | { | |
685 | u8 node_idx; | |
686 | u8 dead_node; | |
687 | __be16 pad1; | |
688 | __be32 pad2; | |
689 | }; | |
690 | ||
691 | ||
1faf2894 SE |
692 | #define BITS_PER_BYTE 8 |
693 | #define BITS_TO_BYTES(bits) (((bits)+BITS_PER_BYTE-1)/BITS_PER_BYTE) | |
694 | ||
6714d8e8 KH |
695 | struct dlm_query_join_request |
696 | { | |
697 | u8 node_idx; | |
698 | u8 pad1[2]; | |
699 | u8 name_len; | |
d24fbcda JB |
700 | struct dlm_protocol_version dlm_proto; |
701 | struct dlm_protocol_version fs_proto; | |
6714d8e8 | 702 | u8 domain[O2NM_MAX_NAME_LEN]; |
1faf2894 | 703 | u8 node_map[BITS_TO_BYTES(O2NM_MAX_NODES)]; |
6714d8e8 KH |
704 | }; |
705 | ||
706 | struct dlm_assert_joined | |
707 | { | |
708 | u8 node_idx; | |
709 | u8 pad1[2]; | |
710 | u8 name_len; | |
711 | u8 domain[O2NM_MAX_NAME_LEN]; | |
712 | }; | |
713 | ||
714 | struct dlm_cancel_join | |
715 | { | |
716 | u8 node_idx; | |
717 | u8 pad1[2]; | |
718 | u8 name_len; | |
719 | u8 domain[O2NM_MAX_NAME_LEN]; | |
720 | }; | |
721 | ||
ea203441 SM |
722 | struct dlm_query_region { |
723 | u8 qr_node; | |
724 | u8 qr_numregions; | |
725 | u8 qr_namelen; | |
726 | u8 pad1; | |
727 | u8 qr_domain[O2NM_MAX_NAME_LEN]; | |
728 | u8 qr_regions[O2HB_MAX_REGION_NAME_LEN * O2NM_MAX_REGIONS]; | |
729 | }; | |
730 | ||
18cfdf1b SM |
731 | struct dlm_node_info { |
732 | u8 ni_nodenum; | |
733 | u8 pad1; | |
85158410 AV |
734 | __be16 ni_ipv4_port; |
735 | __be32 ni_ipv4_address; | |
18cfdf1b SM |
736 | }; |
737 | ||
738 | struct dlm_query_nodeinfo { | |
739 | u8 qn_nodenum; | |
740 | u8 qn_numnodes; | |
741 | u8 qn_namelen; | |
742 | u8 pad1; | |
743 | u8 qn_domain[O2NM_MAX_NAME_LEN]; | |
744 | struct dlm_node_info qn_nodes[O2NM_MAX_NODES]; | |
745 | }; | |
746 | ||
6714d8e8 KH |
747 | struct dlm_exit_domain |
748 | { | |
749 | u8 node_idx; | |
750 | u8 pad1[3]; | |
751 | }; | |
752 | ||
753 | struct dlm_finalize_reco | |
754 | { | |
755 | u8 node_idx; | |
756 | u8 dead_node; | |
466d1a45 KH |
757 | u8 flags; |
758 | u8 pad1; | |
6714d8e8 KH |
759 | __be32 pad2; |
760 | }; | |
761 | ||
ba2bf218 KH |
762 | struct dlm_deref_lockres |
763 | { | |
764 | u32 pad1; | |
765 | u16 pad2; | |
766 | u8 node_idx; | |
767 | u8 namelen; | |
768 | ||
769 | u8 name[O2NM_MAX_NAME_LEN]; | |
770 | }; | |
771 | ||
842b90b6 | 772 | enum { |
773 | DLM_DEREF_RESPONSE_DONE = 0, | |
774 | DLM_DEREF_RESPONSE_INPROG = 1, | |
775 | }; | |
776 | ||
60d663cb | 777 | struct dlm_deref_lockres_done { |
778 | u32 pad1; | |
779 | u16 pad2; | |
780 | u8 node_idx; | |
781 | u8 namelen; | |
782 | ||
783 | u8 name[O2NM_MAX_NAME_LEN]; | |
784 | }; | |
785 | ||
6714d8e8 KH |
786 | static inline enum dlm_status |
787 | __dlm_lockres_state_to_status(struct dlm_lock_resource *res) | |
788 | { | |
789 | enum dlm_status status = DLM_NORMAL; | |
790 | ||
791 | assert_spin_locked(&res->spinlock); | |
792 | ||
814ce694 JX |
793 | if (res->state & (DLM_LOCK_RES_RECOVERING| |
794 | DLM_LOCK_RES_RECOVERY_WAITING)) | |
6714d8e8 KH |
795 | status = DLM_RECOVERING; |
796 | else if (res->state & DLM_LOCK_RES_MIGRATING) | |
797 | status = DLM_MIGRATING; | |
798 | else if (res->state & DLM_LOCK_RES_IN_PROGRESS) | |
799 | status = DLM_FORWARD; | |
800 | ||
801 | return status; | |
802 | } | |
803 | ||
29004858 KH |
804 | static inline u8 dlm_get_lock_cookie_node(u64 cookie) |
805 | { | |
806 | u8 ret; | |
807 | cookie >>= 56; | |
808 | ret = (u8)(cookie & 0xffULL); | |
809 | return ret; | |
810 | } | |
811 | ||
812 | static inline unsigned long long dlm_get_lock_cookie_seq(u64 cookie) | |
813 | { | |
814 | unsigned long long ret; | |
815 | ret = ((unsigned long long)cookie) & 0x00ffffffffffffffULL; | |
816 | return ret; | |
817 | } | |
818 | ||
6714d8e8 KH |
819 | struct dlm_lock * dlm_new_lock(int type, u8 node, u64 cookie, |
820 | struct dlm_lockstatus *lksb); | |
821 | void dlm_lock_get(struct dlm_lock *lock); | |
822 | void dlm_lock_put(struct dlm_lock *lock); | |
823 | ||
824 | void dlm_lock_attach_lockres(struct dlm_lock *lock, | |
825 | struct dlm_lock_resource *res); | |
826 | ||
d74c9803 KH |
827 | int dlm_create_lock_handler(struct o2net_msg *msg, u32 len, void *data, |
828 | void **ret_data); | |
829 | int dlm_convert_lock_handler(struct o2net_msg *msg, u32 len, void *data, | |
830 | void **ret_data); | |
831 | int dlm_proxy_ast_handler(struct o2net_msg *msg, u32 len, void *data, | |
832 | void **ret_data); | |
6714d8e8 KH |
833 | |
834 | void dlm_revert_pending_convert(struct dlm_lock_resource *res, | |
835 | struct dlm_lock *lock); | |
836 | void dlm_revert_pending_lock(struct dlm_lock_resource *res, | |
837 | struct dlm_lock *lock); | |
838 | ||
d74c9803 KH |
839 | int dlm_unlock_lock_handler(struct o2net_msg *msg, u32 len, void *data, |
840 | void **ret_data); | |
6714d8e8 KH |
841 | void dlm_commit_pending_cancel(struct dlm_lock_resource *res, |
842 | struct dlm_lock *lock); | |
843 | void dlm_commit_pending_unlock(struct dlm_lock_resource *res, | |
844 | struct dlm_lock *lock); | |
845 | ||
846 | int dlm_launch_thread(struct dlm_ctxt *dlm); | |
847 | void dlm_complete_thread(struct dlm_ctxt *dlm); | |
848 | int dlm_launch_recovery_thread(struct dlm_ctxt *dlm); | |
849 | void dlm_complete_recovery_thread(struct dlm_ctxt *dlm); | |
850 | void dlm_wait_for_recovery(struct dlm_ctxt *dlm); | |
c03872f5 | 851 | void dlm_kick_recovery_thread(struct dlm_ctxt *dlm); |
e2faea4c | 852 | int dlm_is_node_dead(struct dlm_ctxt *dlm, u8 node); |
ed8625c6 SM |
853 | void dlm_wait_for_node_death(struct dlm_ctxt *dlm, u8 node, int timeout); |
854 | void dlm_wait_for_node_recovery(struct dlm_ctxt *dlm, u8 node, int timeout); | |
6714d8e8 KH |
855 | |
856 | void dlm_put(struct dlm_ctxt *dlm); | |
857 | struct dlm_ctxt *dlm_grab(struct dlm_ctxt *dlm); | |
858 | int dlm_domain_fully_joined(struct dlm_ctxt *dlm); | |
859 | ||
860 | void __dlm_lockres_calc_usage(struct dlm_ctxt *dlm, | |
861 | struct dlm_lock_resource *res); | |
862 | void dlm_lockres_calc_usage(struct dlm_ctxt *dlm, | |
863 | struct dlm_lock_resource *res); | |
95c4f581 MF |
864 | static inline void dlm_lockres_get(struct dlm_lock_resource *res) |
865 | { | |
866 | /* This is called on every lookup, so it might be worth | |
867 | * inlining. */ | |
868 | kref_get(&res->refs); | |
869 | } | |
6714d8e8 | 870 | void dlm_lockres_put(struct dlm_lock_resource *res); |
e9f0b6a6 SM |
871 | void __dlm_unhash_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res); |
872 | void __dlm_insert_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res); | |
ba2bf218 KH |
873 | struct dlm_lock_resource * __dlm_lookup_lockres_full(struct dlm_ctxt *dlm, |
874 | const char *name, | |
875 | unsigned int len, | |
876 | unsigned int hash); | |
6714d8e8 KH |
877 | struct dlm_lock_resource * __dlm_lookup_lockres(struct dlm_ctxt *dlm, |
878 | const char *name, | |
a3d33291 MF |
879 | unsigned int len, |
880 | unsigned int hash); | |
6714d8e8 KH |
881 | struct dlm_lock_resource * dlm_lookup_lockres(struct dlm_ctxt *dlm, |
882 | const char *name, | |
883 | unsigned int len); | |
884 | ||
885 | int dlm_is_host_down(int errno); | |
7d62a978 | 886 | |
6714d8e8 KH |
887 | struct dlm_lock_resource * dlm_get_lock_resource(struct dlm_ctxt *dlm, |
888 | const char *lockid, | |
3384f3df | 889 | int namelen, |
6714d8e8 KH |
890 | int flags); |
891 | struct dlm_lock_resource *dlm_new_lockres(struct dlm_ctxt *dlm, | |
892 | const char *name, | |
893 | unsigned int namelen); | |
894 | ||
8d400b81 SM |
895 | void dlm_lockres_set_refmap_bit(struct dlm_ctxt *dlm, |
896 | struct dlm_lock_resource *res, int bit); | |
897 | void dlm_lockres_clear_refmap_bit(struct dlm_ctxt *dlm, | |
898 | struct dlm_lock_resource *res, int bit); | |
899 | ||
900 | void dlm_lockres_drop_inflight_ref(struct dlm_ctxt *dlm, | |
901 | struct dlm_lock_resource *res); | |
902 | void dlm_lockres_grab_inflight_ref(struct dlm_ctxt *dlm, | |
903 | struct dlm_lock_resource *res); | |
ba2bf218 | 904 | |
ac4fef4d X |
905 | void __dlm_lockres_grab_inflight_worker(struct dlm_ctxt *dlm, |
906 | struct dlm_lock_resource *res); | |
907 | ||
6714d8e8 KH |
908 | void dlm_queue_ast(struct dlm_ctxt *dlm, struct dlm_lock *lock); |
909 | void dlm_queue_bast(struct dlm_ctxt *dlm, struct dlm_lock *lock); | |
d9ef7522 WW |
910 | void __dlm_queue_ast(struct dlm_ctxt *dlm, struct dlm_lock *lock); |
911 | void __dlm_queue_bast(struct dlm_ctxt *dlm, struct dlm_lock *lock); | |
6714d8e8 KH |
912 | void dlm_do_local_ast(struct dlm_ctxt *dlm, |
913 | struct dlm_lock_resource *res, | |
914 | struct dlm_lock *lock); | |
915 | int dlm_do_remote_ast(struct dlm_ctxt *dlm, | |
916 | struct dlm_lock_resource *res, | |
917 | struct dlm_lock *lock); | |
918 | void dlm_do_local_bast(struct dlm_ctxt *dlm, | |
919 | struct dlm_lock_resource *res, | |
920 | struct dlm_lock *lock, | |
921 | int blocked_type); | |
922 | int dlm_send_proxy_ast_msg(struct dlm_ctxt *dlm, | |
923 | struct dlm_lock_resource *res, | |
924 | struct dlm_lock *lock, | |
925 | int msg_type, | |
926 | int blocked_type, int flags); | |
927 | static inline int dlm_send_proxy_bast(struct dlm_ctxt *dlm, | |
928 | struct dlm_lock_resource *res, | |
929 | struct dlm_lock *lock, | |
930 | int blocked_type) | |
931 | { | |
932 | return dlm_send_proxy_ast_msg(dlm, res, lock, DLM_BAST, | |
933 | blocked_type, 0); | |
934 | } | |
935 | ||
936 | static inline int dlm_send_proxy_ast(struct dlm_ctxt *dlm, | |
937 | struct dlm_lock_resource *res, | |
938 | struct dlm_lock *lock, | |
939 | int flags) | |
940 | { | |
941 | return dlm_send_proxy_ast_msg(dlm, res, lock, DLM_AST, | |
942 | 0, flags); | |
943 | } | |
944 | ||
945 | void dlm_print_one_lock_resource(struct dlm_lock_resource *res); | |
946 | void __dlm_print_one_lock_resource(struct dlm_lock_resource *res); | |
947 | ||
6714d8e8 KH |
948 | void dlm_kick_thread(struct dlm_ctxt *dlm, struct dlm_lock_resource *res); |
949 | void __dlm_dirty_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res); | |
950 | ||
951 | ||
6714d8e8 KH |
952 | void dlm_hb_node_down_cb(struct o2nm_node *node, int idx, void *data); |
953 | void dlm_hb_node_up_cb(struct o2nm_node *node, int idx, void *data); | |
954 | ||
ba2bf218 | 955 | int dlm_empty_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res); |
6714d8e8 KH |
956 | int dlm_finish_migration(struct dlm_ctxt *dlm, |
957 | struct dlm_lock_resource *res, | |
958 | u8 old_master); | |
959 | void dlm_lockres_release_ast(struct dlm_ctxt *dlm, | |
960 | struct dlm_lock_resource *res); | |
961 | void __dlm_lockres_reserve_ast(struct dlm_lock_resource *res); | |
962 | ||
d74c9803 KH |
963 | int dlm_master_request_handler(struct o2net_msg *msg, u32 len, void *data, |
964 | void **ret_data); | |
965 | int dlm_assert_master_handler(struct o2net_msg *msg, u32 len, void *data, | |
966 | void **ret_data); | |
3b8118cf | 967 | void dlm_assert_master_post_handler(int status, void *data, void *ret_data); |
d74c9803 KH |
968 | int dlm_deref_lockres_handler(struct o2net_msg *msg, u32 len, void *data, |
969 | void **ret_data); | |
60d663cb | 970 | int dlm_deref_lockres_done_handler(struct o2net_msg *msg, u32 len, void *data, |
971 | void **ret_data); | |
d74c9803 KH |
972 | int dlm_migrate_request_handler(struct o2net_msg *msg, u32 len, void *data, |
973 | void **ret_data); | |
974 | int dlm_mig_lockres_handler(struct o2net_msg *msg, u32 len, void *data, | |
975 | void **ret_data); | |
976 | int dlm_master_requery_handler(struct o2net_msg *msg, u32 len, void *data, | |
977 | void **ret_data); | |
978 | int dlm_request_all_locks_handler(struct o2net_msg *msg, u32 len, void *data, | |
979 | void **ret_data); | |
980 | int dlm_reco_data_done_handler(struct o2net_msg *msg, u32 len, void *data, | |
981 | void **ret_data); | |
982 | int dlm_begin_reco_handler(struct o2net_msg *msg, u32 len, void *data, | |
983 | void **ret_data); | |
984 | int dlm_finalize_reco_handler(struct o2net_msg *msg, u32 len, void *data, | |
985 | void **ret_data); | |
c03872f5 KH |
986 | int dlm_do_master_requery(struct dlm_ctxt *dlm, struct dlm_lock_resource *res, |
987 | u8 nodenum, u8 *real_master); | |
c03872f5 | 988 | |
ee8f7fcb | 989 | void __dlm_do_purge_lockres(struct dlm_ctxt *dlm, |
990 | struct dlm_lock_resource *res); | |
6714d8e8 KH |
991 | |
992 | int dlm_dispatch_assert_master(struct dlm_ctxt *dlm, | |
993 | struct dlm_lock_resource *res, | |
994 | int ignore_higher, | |
995 | u8 request_from, | |
996 | u32 flags); | |
997 | ||
998 | ||
999 | int dlm_send_one_lockres(struct dlm_ctxt *dlm, | |
1000 | struct dlm_lock_resource *res, | |
1001 | struct dlm_migratable_lockres *mres, | |
1002 | u8 send_to, | |
1003 | u8 flags); | |
1004 | void dlm_move_lockres_to_recovery_list(struct dlm_ctxt *dlm, | |
1005 | struct dlm_lock_resource *res); | |
1006 | ||
1007 | /* will exit holding res->spinlock, but may drop in function */ | |
1008 | void __dlm_wait_on_lockres_flags(struct dlm_lock_resource *res, int flags); | |
6714d8e8 KH |
1009 | |
1010 | /* will exit holding res->spinlock, but may drop in function */ | |
1011 | static inline void __dlm_wait_on_lockres(struct dlm_lock_resource *res) | |
1012 | { | |
1013 | __dlm_wait_on_lockres_flags(res, (DLM_LOCK_RES_IN_PROGRESS| | |
1014 | DLM_LOCK_RES_RECOVERING| | |
814ce694 | 1015 | DLM_LOCK_RES_RECOVERY_WAITING| |
6714d8e8 KH |
1016 | DLM_LOCK_RES_MIGRATING)); |
1017 | } | |
1018 | ||
1c084577 SM |
1019 | void __dlm_unlink_mle(struct dlm_ctxt *dlm, struct dlm_master_list_entry *mle); |
1020 | void __dlm_insert_mle(struct dlm_ctxt *dlm, struct dlm_master_list_entry *mle); | |
1021 | ||
724bdca9 SM |
1022 | /* create/destroy slab caches */ |
1023 | int dlm_init_master_caches(void); | |
1024 | void dlm_destroy_master_caches(void); | |
1025 | ||
1026 | int dlm_init_lock_cache(void); | |
1027 | void dlm_destroy_lock_cache(void); | |
6714d8e8 KH |
1028 | |
1029 | int dlm_init_mle_cache(void); | |
1030 | void dlm_destroy_mle_cache(void); | |
724bdca9 | 1031 | |
6714d8e8 | 1032 | void dlm_hb_event_notify_attached(struct dlm_ctxt *dlm, int idx, int node_up); |
ba2bf218 KH |
1033 | int dlm_drop_lockres_ref(struct dlm_ctxt *dlm, |
1034 | struct dlm_lock_resource *res); | |
6714d8e8 KH |
1035 | void dlm_clean_master_list(struct dlm_ctxt *dlm, |
1036 | u8 dead_node); | |
5dad6c39 | 1037 | void dlm_force_free_mles(struct dlm_ctxt *dlm); |
6714d8e8 | 1038 | int dlm_lock_basts_flushed(struct dlm_ctxt *dlm, struct dlm_lock *lock); |
ba2bf218 | 1039 | int __dlm_lockres_has_locks(struct dlm_lock_resource *res); |
69d72b06 | 1040 | int __dlm_lockres_unused(struct dlm_lock_resource *res); |
6714d8e8 KH |
1041 | |
1042 | static inline const char * dlm_lock_mode_name(int mode) | |
1043 | { | |
1044 | switch (mode) { | |
1045 | case LKM_EXMODE: | |
1046 | return "EX"; | |
1047 | case LKM_PRMODE: | |
1048 | return "PR"; | |
1049 | case LKM_NLMODE: | |
1050 | return "NL"; | |
1051 | } | |
1052 | return "UNKNOWN"; | |
1053 | } | |
1054 | ||
1055 | ||
1056 | static inline int dlm_lock_compatible(int existing, int request) | |
1057 | { | |
1058 | /* NO_LOCK compatible with all */ | |
1059 | if (request == LKM_NLMODE || | |
1060 | existing == LKM_NLMODE) | |
1061 | return 1; | |
1062 | ||
1063 | /* EX incompatible with all non-NO_LOCK */ | |
1064 | if (request == LKM_EXMODE) | |
1065 | return 0; | |
1066 | ||
1067 | /* request must be PR, which is compatible with PR */ | |
1068 | if (existing == LKM_PRMODE) | |
1069 | return 1; | |
1070 | ||
1071 | return 0; | |
1072 | } | |
1073 | ||
1074 | static inline int dlm_lock_on_list(struct list_head *head, | |
1075 | struct dlm_lock *lock) | |
1076 | { | |
6714d8e8 KH |
1077 | struct dlm_lock *tmplock; |
1078 | ||
df53cd3b | 1079 | list_for_each_entry(tmplock, head, list) { |
6714d8e8 KH |
1080 | if (tmplock == lock) |
1081 | return 1; | |
1082 | } | |
1083 | return 0; | |
1084 | } | |
1085 | ||
1086 | ||
1087 | static inline enum dlm_status dlm_err_to_dlm_status(int err) | |
1088 | { | |
1089 | enum dlm_status ret; | |
1090 | if (err == -ENOMEM) | |
1091 | ret = DLM_SYSERR; | |
1092 | else if (err == -ETIMEDOUT || o2net_link_down(err, NULL)) | |
1093 | ret = DLM_NOLOCKMGR; | |
1094 | else if (err == -EINVAL) | |
1095 | ret = DLM_BADPARAM; | |
1096 | else if (err == -ENAMETOOLONG) | |
1097 | ret = DLM_IVBUFLEN; | |
1098 | else | |
1099 | ret = DLM_BADARGS; | |
1100 | return ret; | |
1101 | } | |
1102 | ||
1103 | ||
1104 | static inline void dlm_node_iter_init(unsigned long *map, | |
1105 | struct dlm_node_iter *iter) | |
1106 | { | |
1107 | memcpy(iter->node_map, map, sizeof(iter->node_map)); | |
1108 | iter->curnode = -1; | |
1109 | } | |
1110 | ||
1111 | static inline int dlm_node_iter_next(struct dlm_node_iter *iter) | |
1112 | { | |
1113 | int bit; | |
1114 | bit = find_next_bit(iter->node_map, O2NM_MAX_NODES, iter->curnode+1); | |
1115 | if (bit >= O2NM_MAX_NODES) { | |
1116 | iter->curnode = O2NM_MAX_NODES; | |
1117 | return -ENOENT; | |
1118 | } | |
1119 | iter->curnode = bit; | |
1120 | return bit; | |
1121 | } | |
1122 | ||
7d62a978 SM |
1123 | static inline void dlm_set_lockres_owner(struct dlm_ctxt *dlm, |
1124 | struct dlm_lock_resource *res, | |
1125 | u8 owner) | |
1126 | { | |
1127 | assert_spin_locked(&res->spinlock); | |
1128 | ||
1129 | res->owner = owner; | |
1130 | } | |
6714d8e8 | 1131 | |
7d62a978 SM |
1132 | static inline void dlm_change_lockres_owner(struct dlm_ctxt *dlm, |
1133 | struct dlm_lock_resource *res, | |
1134 | u8 owner) | |
1135 | { | |
1136 | assert_spin_locked(&res->spinlock); | |
1137 | ||
1138 | if (owner != res->owner) | |
1139 | dlm_set_lockres_owner(dlm, res, owner); | |
1140 | } | |
6714d8e8 KH |
1141 | |
1142 | #endif /* DLMCOMMON_H */ |