Root/
1 | /****************************************************************************** |
2 | ******************************************************************************* |
3 | ** |
4 | ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
5 | ** Copyright (C) 2004-2010 Red Hat, Inc. All rights reserved. |
6 | ** |
7 | ** This copyrighted material is made available to anyone wishing to use, |
8 | ** modify, copy, or redistribute it subject to the terms and conditions |
9 | ** of the GNU General Public License v.2. |
10 | ** |
11 | ******************************************************************************* |
12 | ******************************************************************************/ |
13 | |
14 | #ifndef __DLM_INTERNAL_DOT_H__ |
15 | #define __DLM_INTERNAL_DOT_H__ |
16 | |
17 | /* |
18 | * This is the main header file to be included in each DLM source file. |
19 | */ |
20 | |
21 | #include <linux/module.h> |
22 | #include <linux/slab.h> |
23 | #include <linux/sched.h> |
24 | #include <linux/types.h> |
25 | #include <linux/ctype.h> |
26 | #include <linux/spinlock.h> |
27 | #include <linux/vmalloc.h> |
28 | #include <linux/list.h> |
29 | #include <linux/errno.h> |
30 | #include <linux/random.h> |
31 | #include <linux/delay.h> |
32 | #include <linux/socket.h> |
33 | #include <linux/kthread.h> |
34 | #include <linux/kobject.h> |
35 | #include <linux/kref.h> |
36 | #include <linux/kernel.h> |
37 | #include <linux/jhash.h> |
38 | #include <linux/miscdevice.h> |
39 | #include <linux/mutex.h> |
40 | #include <asm/uaccess.h> |
41 | |
42 | #include <linux/dlm.h> |
43 | #include "config.h" |
44 | |
45 | /* Size of the temp buffer midcomms allocates on the stack. |
46 | We try to make this large enough so most messages fit. |
47 | FIXME: should sctp make this unnecessary? */ |
48 | |
49 | #define DLM_INBUF_LEN 148 |
50 | |
51 | struct dlm_ls; |
52 | struct dlm_lkb; |
53 | struct dlm_rsb; |
54 | struct dlm_member; |
55 | struct dlm_lkbtable; |
56 | struct dlm_rsbtable; |
57 | struct dlm_dirtable; |
58 | struct dlm_direntry; |
59 | struct dlm_recover; |
60 | struct dlm_header; |
61 | struct dlm_message; |
62 | struct dlm_rcom; |
63 | struct dlm_mhandle; |
64 | |
65 | #define log_print(fmt, args...) \ |
66 | printk(KERN_ERR "dlm: "fmt"\n" , ##args) |
67 | #define log_error(ls, fmt, args...) \ |
68 | printk(KERN_ERR "dlm: %s: " fmt "\n", (ls)->ls_name , ##args) |
69 | |
70 | #define log_debug(ls, fmt, args...) \ |
71 | do { \ |
72 | if (dlm_config.ci_log_debug) \ |
73 | printk(KERN_DEBUG "dlm: %s: " fmt "\n", \ |
74 | (ls)->ls_name , ##args); \ |
75 | } while (0) |
76 | |
77 | #define DLM_ASSERT(x, do) \ |
78 | { \ |
79 | if (!(x)) \ |
80 | { \ |
81 | printk(KERN_ERR "\nDLM: Assertion failed on line %d of file %s\n" \ |
82 | "DLM: assertion: \"%s\"\n" \ |
83 | "DLM: time = %lu\n", \ |
84 | __LINE__, __FILE__, #x, jiffies); \ |
85 | {do} \ |
86 | printk("\n"); \ |
87 | BUG(); \ |
88 | panic("DLM: Record message above and reboot.\n"); \ |
89 | } \ |
90 | } |
91 | |
92 | |
93 | struct dlm_direntry { |
94 | struct list_head list; |
95 | uint32_t master_nodeid; |
96 | uint16_t length; |
97 | char name[1]; |
98 | }; |
99 | |
100 | struct dlm_dirtable { |
101 | struct list_head list; |
102 | spinlock_t lock; |
103 | }; |
104 | |
105 | struct dlm_rsbtable { |
106 | struct list_head list; |
107 | struct list_head toss; |
108 | spinlock_t lock; |
109 | }; |
110 | |
111 | struct dlm_lkbtable { |
112 | struct list_head list; |
113 | rwlock_t lock; |
114 | uint16_t counter; |
115 | }; |
116 | |
117 | /* |
118 | * Lockspace member (per node in a ls) |
119 | */ |
120 | |
121 | struct dlm_member { |
122 | struct list_head list; |
123 | int nodeid; |
124 | int weight; |
125 | }; |
126 | |
127 | /* |
128 | * Save and manage recovery state for a lockspace. |
129 | */ |
130 | |
131 | struct dlm_recover { |
132 | struct list_head list; |
133 | int *nodeids; /* nodeids of all members */ |
134 | int node_count; |
135 | int *new; /* nodeids of new members */ |
136 | int new_count; |
137 | uint64_t seq; |
138 | }; |
139 | |
140 | /* |
141 | * Pass input args to second stage locking function. |
142 | */ |
143 | |
144 | struct dlm_args { |
145 | uint32_t flags; |
146 | void (*astfn) (void *astparam); |
147 | void *astparam; |
148 | void (*bastfn) (void *astparam, int mode); |
149 | int mode; |
150 | struct dlm_lksb *lksb; |
151 | unsigned long timeout; |
152 | }; |
153 | |
154 | |
155 | /* |
156 | * Lock block |
157 | * |
158 | * A lock can be one of three types: |
159 | * |
160 | * local copy lock is mastered locally |
161 | * (lkb_nodeid is zero and DLM_LKF_MSTCPY is not set) |
162 | * process copy lock is mastered on a remote node |
163 | * (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is not set) |
164 | * master copy master node's copy of a lock owned by remote node |
165 | * (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is set) |
166 | * |
167 | * lkb_exflags: a copy of the most recent flags arg provided to dlm_lock or |
168 | * dlm_unlock. The dlm does not modify these or use any private flags in |
169 | * this field; it only contains DLM_LKF_ flags from dlm.h. These flags |
170 | * are sent as-is to the remote master when the lock is remote. |
171 | * |
172 | * lkb_flags: internal dlm flags (DLM_IFL_ prefix) from dlm_internal.h. |
173 | * Some internal flags are shared between the master and process nodes; |
174 | * these shared flags are kept in the lower two bytes. One of these |
175 | * flags set on the master copy will be propagated to the process copy |
176 | * and v.v. Other internal flags are private to the master or process |
177 | * node (e.g. DLM_IFL_MSTCPY). These are kept in the high two bytes. |
178 | * |
179 | * lkb_sbflags: status block flags. These flags are copied directly into |
180 | * the caller's lksb.sb_flags prior to the dlm_lock/dlm_unlock completion |
181 | * ast. All defined in dlm.h with DLM_SBF_ prefix. |
182 | * |
183 | * lkb_status: the lock status indicates which rsb queue the lock is |
184 | * on, grant, convert, or wait. DLM_LKSTS_ WAITING/GRANTED/CONVERT |
185 | * |
186 | * lkb_wait_type: the dlm message type (DLM_MSG_ prefix) for which a |
187 | * reply is needed. Only set when the lkb is on the lockspace waiters |
188 | * list awaiting a reply from a remote node. |
189 | * |
190 | * lkb_nodeid: when the lkb is a local copy, nodeid is 0; when the lkb |
191 | * is a master copy, nodeid specifies the remote lock holder, when the |
192 | * lkb is a process copy, the nodeid specifies the lock master. |
193 | */ |
194 | |
195 | /* lkb_status */ |
196 | |
197 | #define DLM_LKSTS_WAITING 1 |
198 | #define DLM_LKSTS_GRANTED 2 |
199 | #define DLM_LKSTS_CONVERT 3 |
200 | |
201 | /* lkb_flags */ |
202 | |
203 | #define DLM_IFL_MSTCPY 0x00010000 |
204 | #define DLM_IFL_RESEND 0x00020000 |
205 | #define DLM_IFL_DEAD 0x00040000 |
206 | #define DLM_IFL_OVERLAP_UNLOCK 0x00080000 |
207 | #define DLM_IFL_OVERLAP_CANCEL 0x00100000 |
208 | #define DLM_IFL_ENDOFLIFE 0x00200000 |
209 | #define DLM_IFL_WATCH_TIMEWARN 0x00400000 |
210 | #define DLM_IFL_TIMEOUT_CANCEL 0x00800000 |
211 | #define DLM_IFL_DEADLOCK_CANCEL 0x01000000 |
212 | #define DLM_IFL_STUB_MS 0x02000000 /* magic number for m_flags */ |
213 | #define DLM_IFL_USER 0x00000001 |
214 | #define DLM_IFL_ORPHAN 0x00000002 |
215 | |
216 | #define DLM_CALLBACKS_SIZE 6 |
217 | |
218 | #define DLM_CB_CAST 0x00000001 |
219 | #define DLM_CB_BAST 0x00000002 |
220 | #define DLM_CB_SKIP 0x00000004 |
221 | |
222 | struct dlm_callback { |
223 | uint64_t seq; |
224 | uint32_t flags; /* DLM_CBF_ */ |
225 | int sb_status; /* copy to lksb status */ |
226 | uint8_t sb_flags; /* copy to lksb flags */ |
227 | int8_t mode; /* rq mode of bast, gr mode of cast */ |
228 | }; |
229 | |
230 | struct dlm_lkb { |
231 | struct dlm_rsb *lkb_resource; /* the rsb */ |
232 | struct kref lkb_ref; |
233 | int lkb_nodeid; /* copied from rsb */ |
234 | int lkb_ownpid; /* pid of lock owner */ |
235 | uint32_t lkb_id; /* our lock ID */ |
236 | uint32_t lkb_remid; /* lock ID on remote partner */ |
237 | uint32_t lkb_exflags; /* external flags from caller */ |
238 | uint32_t lkb_sbflags; /* lksb flags */ |
239 | uint32_t lkb_flags; /* internal flags */ |
240 | uint32_t lkb_lvbseq; /* lvb sequence number */ |
241 | |
242 | int8_t lkb_status; /* granted, waiting, convert */ |
243 | int8_t lkb_rqmode; /* requested lock mode */ |
244 | int8_t lkb_grmode; /* granted lock mode */ |
245 | int8_t lkb_highbast; /* highest mode bast sent for */ |
246 | |
247 | int8_t lkb_wait_type; /* type of reply waiting for */ |
248 | int8_t lkb_wait_count; |
249 | int lkb_wait_nodeid; /* for debugging */ |
250 | |
251 | struct list_head lkb_idtbl_list; /* lockspace lkbtbl */ |
252 | struct list_head lkb_statequeue; /* rsb g/c/w list */ |
253 | struct list_head lkb_rsb_lookup; /* waiting for rsb lookup */ |
254 | struct list_head lkb_wait_reply; /* waiting for remote reply */ |
255 | struct list_head lkb_astqueue; /* need ast to be sent */ |
256 | struct list_head lkb_ownqueue; /* list of locks for a process */ |
257 | struct list_head lkb_time_list; |
258 | ktime_t lkb_timestamp; |
259 | ktime_t lkb_wait_time; |
260 | unsigned long lkb_timeout_cs; |
261 | |
262 | struct dlm_callback lkb_callbacks[DLM_CALLBACKS_SIZE]; |
263 | struct dlm_callback lkb_last_cast; |
264 | struct dlm_callback lkb_last_bast; |
265 | ktime_t lkb_last_cast_time; /* for debugging */ |
266 | ktime_t lkb_last_bast_time; /* for debugging */ |
267 | |
268 | char *lkb_lvbptr; |
269 | struct dlm_lksb *lkb_lksb; /* caller's status block */ |
270 | void (*lkb_astfn) (void *astparam); |
271 | void (*lkb_bastfn) (void *astparam, int mode); |
272 | union { |
273 | void *lkb_astparam; /* caller's ast arg */ |
274 | struct dlm_user_args *lkb_ua; |
275 | }; |
276 | }; |
277 | |
278 | |
279 | struct dlm_rsb { |
280 | struct dlm_ls *res_ls; /* the lockspace */ |
281 | struct kref res_ref; |
282 | struct mutex res_mutex; |
283 | unsigned long res_flags; |
284 | int res_length; /* length of rsb name */ |
285 | int res_nodeid; |
286 | uint32_t res_lvbseq; |
287 | uint32_t res_hash; |
288 | uint32_t res_bucket; /* rsbtbl */ |
289 | unsigned long res_toss_time; |
290 | uint32_t res_first_lkid; |
291 | struct list_head res_lookup; /* lkbs waiting on first */ |
292 | struct list_head res_hashchain; /* rsbtbl */ |
293 | struct list_head res_grantqueue; |
294 | struct list_head res_convertqueue; |
295 | struct list_head res_waitqueue; |
296 | |
297 | struct list_head res_root_list; /* used for recovery */ |
298 | struct list_head res_recover_list; /* used for recovery */ |
299 | int res_recover_locks_count; |
300 | |
301 | char *res_lvbptr; |
302 | char res_name[1]; |
303 | }; |
304 | |
305 | /* find_rsb() flags */ |
306 | |
307 | #define R_MASTER 1 /* only return rsb if it's a master */ |
308 | #define R_CREATE 2 /* create/add rsb if not found */ |
309 | |
310 | /* rsb_flags */ |
311 | |
312 | enum rsb_flags { |
313 | RSB_MASTER_UNCERTAIN, |
314 | RSB_VALNOTVALID, |
315 | RSB_VALNOTVALID_PREV, |
316 | RSB_NEW_MASTER, |
317 | RSB_NEW_MASTER2, |
318 | RSB_RECOVER_CONVERT, |
319 | RSB_LOCKS_PURGED, |
320 | }; |
321 | |
322 | static inline void rsb_set_flag(struct dlm_rsb *r, enum rsb_flags flag) |
323 | { |
324 | __set_bit(flag, &r->res_flags); |
325 | } |
326 | |
327 | static inline void rsb_clear_flag(struct dlm_rsb *r, enum rsb_flags flag) |
328 | { |
329 | __clear_bit(flag, &r->res_flags); |
330 | } |
331 | |
332 | static inline int rsb_flag(struct dlm_rsb *r, enum rsb_flags flag) |
333 | { |
334 | return test_bit(flag, &r->res_flags); |
335 | } |
336 | |
337 | |
338 | /* dlm_header is first element of all structs sent between nodes */ |
339 | |
340 | #define DLM_HEADER_MAJOR 0x00030000 |
341 | #define DLM_HEADER_MINOR 0x00000000 |
342 | |
343 | #define DLM_MSG 1 |
344 | #define DLM_RCOM 2 |
345 | |
346 | struct dlm_header { |
347 | uint32_t h_version; |
348 | uint32_t h_lockspace; |
349 | uint32_t h_nodeid; /* nodeid of sender */ |
350 | uint16_t h_length; |
351 | uint8_t h_cmd; /* DLM_MSG, DLM_RCOM */ |
352 | uint8_t h_pad; |
353 | }; |
354 | |
355 | |
356 | #define DLM_MSG_REQUEST 1 |
357 | #define DLM_MSG_CONVERT 2 |
358 | #define DLM_MSG_UNLOCK 3 |
359 | #define DLM_MSG_CANCEL 4 |
360 | #define DLM_MSG_REQUEST_REPLY 5 |
361 | #define DLM_MSG_CONVERT_REPLY 6 |
362 | #define DLM_MSG_UNLOCK_REPLY 7 |
363 | #define DLM_MSG_CANCEL_REPLY 8 |
364 | #define DLM_MSG_GRANT 9 |
365 | #define DLM_MSG_BAST 10 |
366 | #define DLM_MSG_LOOKUP 11 |
367 | #define DLM_MSG_REMOVE 12 |
368 | #define DLM_MSG_LOOKUP_REPLY 13 |
369 | #define DLM_MSG_PURGE 14 |
370 | |
371 | struct dlm_message { |
372 | struct dlm_header m_header; |
373 | uint32_t m_type; /* DLM_MSG_ */ |
374 | uint32_t m_nodeid; |
375 | uint32_t m_pid; |
376 | uint32_t m_lkid; /* lkid on sender */ |
377 | uint32_t m_remid; /* lkid on receiver */ |
378 | uint32_t m_parent_lkid; |
379 | uint32_t m_parent_remid; |
380 | uint32_t m_exflags; |
381 | uint32_t m_sbflags; |
382 | uint32_t m_flags; |
383 | uint32_t m_lvbseq; |
384 | uint32_t m_hash; |
385 | int m_status; |
386 | int m_grmode; |
387 | int m_rqmode; |
388 | int m_bastmode; |
389 | int m_asts; |
390 | int m_result; /* 0 or -EXXX */ |
391 | char m_extra[0]; /* name or lvb */ |
392 | }; |
393 | |
394 | |
395 | #define DLM_RS_NODES 0x00000001 |
396 | #define DLM_RS_NODES_ALL 0x00000002 |
397 | #define DLM_RS_DIR 0x00000004 |
398 | #define DLM_RS_DIR_ALL 0x00000008 |
399 | #define DLM_RS_LOCKS 0x00000010 |
400 | #define DLM_RS_LOCKS_ALL 0x00000020 |
401 | #define DLM_RS_DONE 0x00000040 |
402 | #define DLM_RS_DONE_ALL 0x00000080 |
403 | |
404 | #define DLM_RCOM_STATUS 1 |
405 | #define DLM_RCOM_NAMES 2 |
406 | #define DLM_RCOM_LOOKUP 3 |
407 | #define DLM_RCOM_LOCK 4 |
408 | #define DLM_RCOM_STATUS_REPLY 5 |
409 | #define DLM_RCOM_NAMES_REPLY 6 |
410 | #define DLM_RCOM_LOOKUP_REPLY 7 |
411 | #define DLM_RCOM_LOCK_REPLY 8 |
412 | |
413 | struct dlm_rcom { |
414 | struct dlm_header rc_header; |
415 | uint32_t rc_type; /* DLM_RCOM_ */ |
416 | int rc_result; /* multi-purpose */ |
417 | uint64_t rc_id; /* match reply with request */ |
418 | uint64_t rc_seq; /* sender's ls_recover_seq */ |
419 | uint64_t rc_seq_reply; /* remote ls_recover_seq */ |
420 | char rc_buf[0]; |
421 | }; |
422 | |
423 | union dlm_packet { |
424 | struct dlm_header header; /* common to other two */ |
425 | struct dlm_message message; |
426 | struct dlm_rcom rcom; |
427 | }; |
428 | |
429 | struct rcom_config { |
430 | __le32 rf_lvblen; |
431 | __le32 rf_lsflags; |
432 | __le64 rf_unused; |
433 | }; |
434 | |
435 | struct rcom_lock { |
436 | __le32 rl_ownpid; |
437 | __le32 rl_lkid; |
438 | __le32 rl_remid; |
439 | __le32 rl_parent_lkid; |
440 | __le32 rl_parent_remid; |
441 | __le32 rl_exflags; |
442 | __le32 rl_flags; |
443 | __le32 rl_lvbseq; |
444 | __le32 rl_result; |
445 | int8_t rl_rqmode; |
446 | int8_t rl_grmode; |
447 | int8_t rl_status; |
448 | int8_t rl_asts; |
449 | __le16 rl_wait_type; |
450 | __le16 rl_namelen; |
451 | char rl_name[DLM_RESNAME_MAXLEN]; |
452 | char rl_lvb[0]; |
453 | }; |
454 | |
455 | struct dlm_ls { |
456 | struct list_head ls_list; /* list of lockspaces */ |
457 | dlm_lockspace_t *ls_local_handle; |
458 | uint32_t ls_global_id; /* global unique lockspace ID */ |
459 | uint32_t ls_exflags; |
460 | int ls_lvblen; |
461 | int ls_count; /* refcount of processes in |
462 | the dlm using this ls */ |
463 | int ls_create_count; /* create/release refcount */ |
464 | unsigned long ls_flags; /* LSFL_ */ |
465 | unsigned long ls_scan_time; |
466 | struct kobject ls_kobj; |
467 | |
468 | struct dlm_rsbtable *ls_rsbtbl; |
469 | uint32_t ls_rsbtbl_size; |
470 | |
471 | struct dlm_lkbtable *ls_lkbtbl; |
472 | uint32_t ls_lkbtbl_size; |
473 | |
474 | struct dlm_dirtable *ls_dirtbl; |
475 | uint32_t ls_dirtbl_size; |
476 | |
477 | struct mutex ls_waiters_mutex; |
478 | struct list_head ls_waiters; /* lkbs needing a reply */ |
479 | |
480 | struct mutex ls_orphans_mutex; |
481 | struct list_head ls_orphans; |
482 | |
483 | struct mutex ls_timeout_mutex; |
484 | struct list_head ls_timeout; |
485 | |
486 | struct list_head ls_nodes; /* current nodes in ls */ |
487 | struct list_head ls_nodes_gone; /* dead node list, recovery */ |
488 | int ls_num_nodes; /* number of nodes in ls */ |
489 | int ls_low_nodeid; |
490 | int ls_total_weight; |
491 | int *ls_node_array; |
492 | |
493 | struct dlm_rsb ls_stub_rsb; /* for returning errors */ |
494 | struct dlm_lkb ls_stub_lkb; /* for returning errors */ |
495 | struct dlm_message ls_stub_ms; /* for faking a reply */ |
496 | |
497 | struct dentry *ls_debug_rsb_dentry; /* debugfs */ |
498 | struct dentry *ls_debug_waiters_dentry; /* debugfs */ |
499 | struct dentry *ls_debug_locks_dentry; /* debugfs */ |
500 | struct dentry *ls_debug_all_dentry; /* debugfs */ |
501 | |
502 | wait_queue_head_t ls_uevent_wait; /* user part of join/leave */ |
503 | int ls_uevent_result; |
504 | struct completion ls_members_done; |
505 | int ls_members_result; |
506 | |
507 | struct miscdevice ls_device; |
508 | |
509 | /* recovery related */ |
510 | |
511 | struct timer_list ls_timer; |
512 | struct task_struct *ls_recoverd_task; |
513 | struct mutex ls_recoverd_active; |
514 | spinlock_t ls_recover_lock; |
515 | unsigned long ls_recover_begin; /* jiffies timestamp */ |
516 | uint32_t ls_recover_status; /* DLM_RS_ */ |
517 | uint64_t ls_recover_seq; |
518 | struct dlm_recover *ls_recover_args; |
519 | struct rw_semaphore ls_in_recovery; /* block local requests */ |
520 | struct rw_semaphore ls_recv_active; /* block dlm_recv */ |
521 | struct list_head ls_requestqueue;/* queue remote requests */ |
522 | struct mutex ls_requestqueue_mutex; |
523 | struct dlm_rcom *ls_recover_buf; |
524 | int ls_recover_nodeid; /* for debugging */ |
525 | uint64_t ls_rcom_seq; |
526 | spinlock_t ls_rcom_spin; |
527 | struct list_head ls_recover_list; |
528 | spinlock_t ls_recover_list_lock; |
529 | int ls_recover_list_count; |
530 | wait_queue_head_t ls_wait_general; |
531 | struct mutex ls_clear_proc_locks; |
532 | |
533 | struct list_head ls_root_list; /* root resources */ |
534 | struct rw_semaphore ls_root_sem; /* protect root_list */ |
535 | |
536 | int ls_namelen; |
537 | char ls_name[1]; |
538 | }; |
539 | |
540 | #define LSFL_WORK 0 |
541 | #define LSFL_RUNNING 1 |
542 | #define LSFL_RECOVERY_STOP 2 |
543 | #define LSFL_RCOM_READY 3 |
544 | #define LSFL_RCOM_WAIT 4 |
545 | #define LSFL_UEVENT_WAIT 5 |
546 | #define LSFL_TIMEWARN 6 |
547 | |
548 | /* much of this is just saving user space pointers associated with the |
549 | lock that we pass back to the user lib with an ast */ |
550 | |
551 | struct dlm_user_args { |
552 | struct dlm_user_proc *proc; /* each process that opens the lockspace |
553 | device has private data |
554 | (dlm_user_proc) on the struct file, |
555 | the process's locks point back to it*/ |
556 | struct dlm_lksb lksb; |
557 | struct dlm_lksb __user *user_lksb; |
558 | void __user *castparam; |
559 | void __user *castaddr; |
560 | void __user *bastparam; |
561 | void __user *bastaddr; |
562 | uint64_t xid; |
563 | }; |
564 | |
565 | #define DLM_PROC_FLAGS_CLOSING 1 |
566 | #define DLM_PROC_FLAGS_COMPAT 2 |
567 | |
568 | /* locks list is kept so we can remove all a process's locks when it |
569 | exits (or orphan those that are persistent) */ |
570 | |
571 | struct dlm_user_proc { |
572 | dlm_lockspace_t *lockspace; |
573 | unsigned long flags; /* DLM_PROC_FLAGS */ |
574 | struct list_head asts; |
575 | spinlock_t asts_spin; |
576 | struct list_head locks; |
577 | spinlock_t locks_spin; |
578 | struct list_head unlocking; |
579 | wait_queue_head_t wait; |
580 | }; |
581 | |
582 | static inline int dlm_locking_stopped(struct dlm_ls *ls) |
583 | { |
584 | return !test_bit(LSFL_RUNNING, &ls->ls_flags); |
585 | } |
586 | |
587 | static inline int dlm_recovery_stopped(struct dlm_ls *ls) |
588 | { |
589 | return test_bit(LSFL_RECOVERY_STOP, &ls->ls_flags); |
590 | } |
591 | |
592 | static inline int dlm_no_directory(struct dlm_ls *ls) |
593 | { |
594 | return (ls->ls_exflags & DLM_LSFL_NODIR) ? 1 : 0; |
595 | } |
596 | |
597 | int dlm_netlink_init(void); |
598 | void dlm_netlink_exit(void); |
599 | void dlm_timeout_warn(struct dlm_lkb *lkb); |
600 | int dlm_plock_init(void); |
601 | void dlm_plock_exit(void); |
602 | |
603 | #ifdef CONFIG_DLM_DEBUG |
604 | int dlm_register_debugfs(void); |
605 | void dlm_unregister_debugfs(void); |
606 | int dlm_create_debug_file(struct dlm_ls *ls); |
607 | void dlm_delete_debug_file(struct dlm_ls *ls); |
608 | #else |
609 | static inline int dlm_register_debugfs(void) { return 0; } |
610 | static inline void dlm_unregister_debugfs(void) { } |
611 | static inline int dlm_create_debug_file(struct dlm_ls *ls) { return 0; } |
612 | static inline void dlm_delete_debug_file(struct dlm_ls *ls) { } |
613 | #endif |
614 | |
615 | #endif /* __DLM_INTERNAL_DOT_H__ */ |
616 | |
617 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
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jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9