blob: 74901e981e1089363bdc501fefc9c4ed106c70bb [file] [log] [blame]
David Teiglande7fd4172006-01-18 09:30:29 +00001/******************************************************************************
2*******************************************************************************
3**
4** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
David Teiglandef0c2bb2007-03-28 09:56:46 -05005** Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
David Teiglande7fd4172006-01-18 09:30:29 +00006**
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>
David Teigland597d0ca2006-07-12 16:44:04 -050038#include <linux/miscdevice.h>
David Teigland90135922006-01-20 08:47:07 +000039#include <linux/mutex.h>
David Teiglande7fd4172006-01-18 09:30:29 +000040#include <asm/semaphore.h>
41#include <asm/uaccess.h>
42
43#include <linux/dlm.h>
David Teigland99fc6482007-01-09 09:44:01 -060044#include "config.h"
David Teiglande7fd4172006-01-18 09:30:29 +000045
46#define DLM_LOCKSPACE_LEN 64
47
David Teiglande7fd4172006-01-18 09:30:29 +000048/* Size of the temp buffer midcomms allocates on the stack.
49 We try to make this large enough so most messages fit.
50 FIXME: should sctp make this unnecessary? */
51
52#define DLM_INBUF_LEN 148
53
54struct dlm_ls;
55struct dlm_lkb;
56struct dlm_rsb;
57struct dlm_member;
58struct dlm_lkbtable;
59struct dlm_rsbtable;
60struct dlm_dirtable;
61struct dlm_direntry;
62struct dlm_recover;
63struct dlm_header;
64struct dlm_message;
65struct dlm_rcom;
66struct dlm_mhandle;
67
68#define log_print(fmt, args...) \
69 printk(KERN_ERR "dlm: "fmt"\n" , ##args)
70#define log_error(ls, fmt, args...) \
71 printk(KERN_ERR "dlm: %s: " fmt "\n", (ls)->ls_name , ##args)
72
David Teigland99fc6482007-01-09 09:44:01 -060073#define log_debug(ls, fmt, args...) \
74do { \
75 if (dlm_config.ci_log_debug) \
76 printk(KERN_DEBUG "dlm: %s: " fmt "\n", \
77 (ls)->ls_name , ##args); \
78} while (0)
David Teiglande7fd4172006-01-18 09:30:29 +000079
80#define DLM_ASSERT(x, do) \
81{ \
82 if (!(x)) \
83 { \
84 printk(KERN_ERR "\nDLM: Assertion failed on line %d of file %s\n" \
85 "DLM: assertion: \"%s\"\n" \
86 "DLM: time = %lu\n", \
87 __LINE__, __FILE__, #x, jiffies); \
88 {do} \
89 printk("\n"); \
90 BUG(); \
91 panic("DLM: Record message above and reboot.\n"); \
92 } \
93}
94
David Teigland32f105a2006-08-23 16:07:31 -040095#define DLM_FAKE_USER_AST ERR_PTR(-EINVAL)
96
David Teiglande7fd4172006-01-18 09:30:29 +000097
98struct dlm_direntry {
99 struct list_head list;
100 uint32_t master_nodeid;
101 uint16_t length;
102 char name[1];
103};
104
105struct dlm_dirtable {
106 struct list_head list;
107 rwlock_t lock;
108};
109
110struct dlm_rsbtable {
111 struct list_head list;
112 struct list_head toss;
113 rwlock_t lock;
114};
115
116struct dlm_lkbtable {
117 struct list_head list;
118 rwlock_t lock;
119 uint16_t counter;
120};
121
122/*
123 * Lockspace member (per node in a ls)
124 */
125
126struct dlm_member {
127 struct list_head list;
128 int nodeid;
129 int weight;
130};
131
132/*
133 * Save and manage recovery state for a lockspace.
134 */
135
136struct dlm_recover {
137 struct list_head list;
138 int *nodeids;
139 int node_count;
140 uint64_t seq;
141};
142
143/*
144 * Pass input args to second stage locking function.
145 */
146
147struct dlm_args {
148 uint32_t flags;
149 void *astaddr;
150 long astparam;
151 void *bastaddr;
152 int mode;
153 struct dlm_lksb *lksb;
David Teiglandd7db9232007-05-18 09:00:32 -0500154 unsigned long timeout;
David Teiglande7fd4172006-01-18 09:30:29 +0000155};
156
157
158/*
159 * Lock block
160 *
161 * A lock can be one of three types:
162 *
163 * local copy lock is mastered locally
164 * (lkb_nodeid is zero and DLM_LKF_MSTCPY is not set)
165 * process copy lock is mastered on a remote node
166 * (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is not set)
167 * master copy master node's copy of a lock owned by remote node
168 * (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is set)
169 *
170 * lkb_exflags: a copy of the most recent flags arg provided to dlm_lock or
171 * dlm_unlock. The dlm does not modify these or use any private flags in
172 * this field; it only contains DLM_LKF_ flags from dlm.h. These flags
173 * are sent as-is to the remote master when the lock is remote.
174 *
175 * lkb_flags: internal dlm flags (DLM_IFL_ prefix) from dlm_internal.h.
176 * Some internal flags are shared between the master and process nodes;
177 * these shared flags are kept in the lower two bytes. One of these
178 * flags set on the master copy will be propagated to the process copy
179 * and v.v. Other internal flags are private to the master or process
180 * node (e.g. DLM_IFL_MSTCPY). These are kept in the high two bytes.
181 *
182 * lkb_sbflags: status block flags. These flags are copied directly into
183 * the caller's lksb.sb_flags prior to the dlm_lock/dlm_unlock completion
184 * ast. All defined in dlm.h with DLM_SBF_ prefix.
185 *
186 * lkb_status: the lock status indicates which rsb queue the lock is
187 * on, grant, convert, or wait. DLM_LKSTS_ WAITING/GRANTED/CONVERT
188 *
189 * lkb_wait_type: the dlm message type (DLM_MSG_ prefix) for which a
190 * reply is needed. Only set when the lkb is on the lockspace waiters
191 * list awaiting a reply from a remote node.
192 *
193 * lkb_nodeid: when the lkb is a local copy, nodeid is 0; when the lkb
194 * is a master copy, nodeid specifies the remote lock holder, when the
195 * lkb is a process copy, the nodeid specifies the lock master.
196 */
197
198/* lkb_ast_type */
199
200#define AST_COMP 1
201#define AST_BAST 2
202
David Teiglande7fd4172006-01-18 09:30:29 +0000203/* lkb_status */
204
205#define DLM_LKSTS_WAITING 1
206#define DLM_LKSTS_GRANTED 2
207#define DLM_LKSTS_CONVERT 3
208
209/* lkb_flags */
210
211#define DLM_IFL_MSTCPY 0x00010000
212#define DLM_IFL_RESEND 0x00020000
David Teigland597d0ca2006-07-12 16:44:04 -0500213#define DLM_IFL_DEAD 0x00040000
David Teiglandef0c2bb2007-03-28 09:56:46 -0500214#define DLM_IFL_OVERLAP_UNLOCK 0x00080000
215#define DLM_IFL_OVERLAP_CANCEL 0x00100000
216#define DLM_IFL_ENDOFLIFE 0x00200000
David Teigland3ae1acf2007-05-18 08:59:31 -0500217#define DLM_IFL_WATCH_TIMEWARN 0x00400000
David Teigland84d8cd62007-05-29 08:44:23 -0500218#define DLM_IFL_TIMEOUT_CANCEL 0x00800000
David Teigland8b4021f2007-05-29 08:46:00 -0500219#define DLM_IFL_DEADLOCK_CANCEL 0x01000000
David Teigland597d0ca2006-07-12 16:44:04 -0500220#define DLM_IFL_USER 0x00000001
221#define DLM_IFL_ORPHAN 0x00000002
David Teiglande7fd4172006-01-18 09:30:29 +0000222
223struct dlm_lkb {
224 struct dlm_rsb *lkb_resource; /* the rsb */
225 struct kref lkb_ref;
226 int lkb_nodeid; /* copied from rsb */
227 int lkb_ownpid; /* pid of lock owner */
228 uint32_t lkb_id; /* our lock ID */
229 uint32_t lkb_remid; /* lock ID on remote partner */
230 uint32_t lkb_exflags; /* external flags from caller */
231 uint32_t lkb_sbflags; /* lksb flags */
232 uint32_t lkb_flags; /* internal flags */
233 uint32_t lkb_lvbseq; /* lvb sequence number */
234
235 int8_t lkb_status; /* granted, waiting, convert */
236 int8_t lkb_rqmode; /* requested lock mode */
237 int8_t lkb_grmode; /* granted lock mode */
238 int8_t lkb_bastmode; /* requested mode */
239 int8_t lkb_highbast; /* highest mode bast sent for */
David Teiglande7fd4172006-01-18 09:30:29 +0000240 int8_t lkb_wait_type; /* type of reply waiting for */
David Teiglandef0c2bb2007-03-28 09:56:46 -0500241 int8_t lkb_wait_count;
David Teiglande7fd4172006-01-18 09:30:29 +0000242 int8_t lkb_ast_type; /* type of ast queued for */
243
244 struct list_head lkb_idtbl_list; /* lockspace lkbtbl */
245 struct list_head lkb_statequeue; /* rsb g/c/w list */
246 struct list_head lkb_rsb_lookup; /* waiting for rsb lookup */
247 struct list_head lkb_wait_reply; /* waiting for remote reply */
248 struct list_head lkb_astqueue; /* need ast to be sent */
David Teigland597d0ca2006-07-12 16:44:04 -0500249 struct list_head lkb_ownqueue; /* list of locks for a process */
David Teigland3ae1acf2007-05-18 08:59:31 -0500250 struct list_head lkb_time_list;
251 unsigned long lkb_timestamp;
252 unsigned long lkb_timeout_cs;
David Teiglande7fd4172006-01-18 09:30:29 +0000253
David Teiglande7fd4172006-01-18 09:30:29 +0000254 char *lkb_lvbptr;
255 struct dlm_lksb *lkb_lksb; /* caller's status block */
256 void *lkb_astaddr; /* caller's ast function */
257 void *lkb_bastaddr; /* caller's bast function */
258 long lkb_astparam; /* caller's ast arg */
259};
260
261
262struct dlm_rsb {
263 struct dlm_ls *res_ls; /* the lockspace */
264 struct kref res_ref;
David Teigland90135922006-01-20 08:47:07 +0000265 struct mutex res_mutex;
David Teiglande7fd4172006-01-18 09:30:29 +0000266 unsigned long res_flags;
267 int res_length; /* length of rsb name */
268 int res_nodeid;
269 uint32_t res_lvbseq;
270 uint32_t res_hash;
271 uint32_t res_bucket; /* rsbtbl */
272 unsigned long res_toss_time;
273 uint32_t res_first_lkid;
274 struct list_head res_lookup; /* lkbs waiting on first */
275 struct list_head res_hashchain; /* rsbtbl */
276 struct list_head res_grantqueue;
277 struct list_head res_convertqueue;
278 struct list_head res_waitqueue;
279
280 struct list_head res_root_list; /* used for recovery */
281 struct list_head res_recover_list; /* used for recovery */
282 int res_recover_locks_count;
283
284 char *res_lvbptr;
285 char res_name[1];
286};
287
288/* find_rsb() flags */
289
290#define R_MASTER 1 /* only return rsb if it's a master */
291#define R_CREATE 2 /* create/add rsb if not found */
292
293/* rsb_flags */
294
295enum rsb_flags {
296 RSB_MASTER_UNCERTAIN,
297 RSB_VALNOTVALID,
298 RSB_VALNOTVALID_PREV,
299 RSB_NEW_MASTER,
300 RSB_NEW_MASTER2,
301 RSB_RECOVER_CONVERT,
David Teigland97a35d12006-05-02 13:34:03 -0400302 RSB_LOCKS_PURGED,
David Teiglande7fd4172006-01-18 09:30:29 +0000303};
304
305static inline void rsb_set_flag(struct dlm_rsb *r, enum rsb_flags flag)
306{
307 __set_bit(flag, &r->res_flags);
308}
309
310static inline void rsb_clear_flag(struct dlm_rsb *r, enum rsb_flags flag)
311{
312 __clear_bit(flag, &r->res_flags);
313}
314
315static inline int rsb_flag(struct dlm_rsb *r, enum rsb_flags flag)
316{
317 return test_bit(flag, &r->res_flags);
318}
319
320
321/* dlm_header is first element of all structs sent between nodes */
322
David Teigland38aa8b02006-12-13 10:37:16 -0600323#define DLM_HEADER_MAJOR 0x00030000
324#define DLM_HEADER_MINOR 0x00000000
David Teiglande7fd4172006-01-18 09:30:29 +0000325
326#define DLM_MSG 1
327#define DLM_RCOM 2
328
329struct dlm_header {
330 uint32_t h_version;
331 uint32_t h_lockspace;
332 uint32_t h_nodeid; /* nodeid of sender */
333 uint16_t h_length;
334 uint8_t h_cmd; /* DLM_MSG, DLM_RCOM */
335 uint8_t h_pad;
336};
337
338
339#define DLM_MSG_REQUEST 1
340#define DLM_MSG_CONVERT 2
341#define DLM_MSG_UNLOCK 3
342#define DLM_MSG_CANCEL 4
343#define DLM_MSG_REQUEST_REPLY 5
344#define DLM_MSG_CONVERT_REPLY 6
345#define DLM_MSG_UNLOCK_REPLY 7
346#define DLM_MSG_CANCEL_REPLY 8
347#define DLM_MSG_GRANT 9
348#define DLM_MSG_BAST 10
349#define DLM_MSG_LOOKUP 11
350#define DLM_MSG_REMOVE 12
351#define DLM_MSG_LOOKUP_REPLY 13
David Teigland84991372007-03-30 15:02:40 -0500352#define DLM_MSG_PURGE 14
David Teiglande7fd4172006-01-18 09:30:29 +0000353
354struct dlm_message {
355 struct dlm_header m_header;
356 uint32_t m_type; /* DLM_MSG_ */
357 uint32_t m_nodeid;
358 uint32_t m_pid;
359 uint32_t m_lkid; /* lkid on sender */
360 uint32_t m_remid; /* lkid on receiver */
361 uint32_t m_parent_lkid;
362 uint32_t m_parent_remid;
363 uint32_t m_exflags;
364 uint32_t m_sbflags;
365 uint32_t m_flags;
366 uint32_t m_lvbseq;
367 uint32_t m_hash;
368 int m_status;
369 int m_grmode;
370 int m_rqmode;
371 int m_bastmode;
372 int m_asts;
373 int m_result; /* 0 or -EXXX */
David Teiglande7fd4172006-01-18 09:30:29 +0000374 char m_extra[0]; /* name or lvb */
375};
376
377
378#define DLM_RS_NODES 0x00000001
379#define DLM_RS_NODES_ALL 0x00000002
380#define DLM_RS_DIR 0x00000004
381#define DLM_RS_DIR_ALL 0x00000008
382#define DLM_RS_LOCKS 0x00000010
383#define DLM_RS_LOCKS_ALL 0x00000020
384#define DLM_RS_DONE 0x00000040
385#define DLM_RS_DONE_ALL 0x00000080
386
387#define DLM_RCOM_STATUS 1
388#define DLM_RCOM_NAMES 2
389#define DLM_RCOM_LOOKUP 3
390#define DLM_RCOM_LOCK 4
391#define DLM_RCOM_STATUS_REPLY 5
392#define DLM_RCOM_NAMES_REPLY 6
393#define DLM_RCOM_LOOKUP_REPLY 7
394#define DLM_RCOM_LOCK_REPLY 8
395
396struct dlm_rcom {
397 struct dlm_header rc_header;
398 uint32_t rc_type; /* DLM_RCOM_ */
399 int rc_result; /* multi-purpose */
400 uint64_t rc_id; /* match reply with request */
David Teigland38aa8b02006-12-13 10:37:16 -0600401 uint64_t rc_seq; /* sender's ls_recover_seq */
402 uint64_t rc_seq_reply; /* remote ls_recover_seq */
David Teiglande7fd4172006-01-18 09:30:29 +0000403 char rc_buf[0];
404};
405
406struct rcom_config {
407 uint32_t rf_lvblen;
408 uint32_t rf_lsflags;
409 uint64_t rf_unused;
410};
411
412struct rcom_lock {
413 uint32_t rl_ownpid;
414 uint32_t rl_lkid;
415 uint32_t rl_remid;
416 uint32_t rl_parent_lkid;
417 uint32_t rl_parent_remid;
418 uint32_t rl_exflags;
419 uint32_t rl_flags;
420 uint32_t rl_lvbseq;
421 int rl_result;
422 int8_t rl_rqmode;
423 int8_t rl_grmode;
424 int8_t rl_status;
425 int8_t rl_asts;
426 uint16_t rl_wait_type;
427 uint16_t rl_namelen;
David Teiglande7fd4172006-01-18 09:30:29 +0000428 char rl_name[DLM_RESNAME_MAXLEN];
429 char rl_lvb[0];
430};
431
432struct dlm_ls {
433 struct list_head ls_list; /* list of lockspaces */
David Teigland597d0ca2006-07-12 16:44:04 -0500434 dlm_lockspace_t *ls_local_handle;
David Teiglande7fd4172006-01-18 09:30:29 +0000435 uint32_t ls_global_id; /* global unique lockspace ID */
436 uint32_t ls_exflags;
437 int ls_lvblen;
438 int ls_count; /* reference count */
439 unsigned long ls_flags; /* LSFL_ */
440 struct kobject ls_kobj;
441
442 struct dlm_rsbtable *ls_rsbtbl;
443 uint32_t ls_rsbtbl_size;
444
445 struct dlm_lkbtable *ls_lkbtbl;
446 uint32_t ls_lkbtbl_size;
447
448 struct dlm_dirtable *ls_dirtbl;
449 uint32_t ls_dirtbl_size;
450
David Teigland90135922006-01-20 08:47:07 +0000451 struct mutex ls_waiters_mutex;
David Teiglande7fd4172006-01-18 09:30:29 +0000452 struct list_head ls_waiters; /* lkbs needing a reply */
453
David Teiglandef0c2bb2007-03-28 09:56:46 -0500454 struct mutex ls_orphans_mutex;
455 struct list_head ls_orphans;
456
David Teigland3ae1acf2007-05-18 08:59:31 -0500457 struct mutex ls_timeout_mutex;
458 struct list_head ls_timeout;
459
David Teiglande7fd4172006-01-18 09:30:29 +0000460 struct list_head ls_nodes; /* current nodes in ls */
461 struct list_head ls_nodes_gone; /* dead node list, recovery */
462 int ls_num_nodes; /* number of nodes in ls */
463 int ls_low_nodeid;
464 int ls_total_weight;
465 int *ls_node_array;
Patrick Caulfield44f487a2007-06-06 09:21:22 -0500466 gfp_t ls_allocation;
David Teiglande7fd4172006-01-18 09:30:29 +0000467
468 struct dlm_rsb ls_stub_rsb; /* for returning errors */
469 struct dlm_lkb ls_stub_lkb; /* for returning errors */
470 struct dlm_message ls_stub_ms; /* for faking a reply */
471
David Teigland5de63192006-07-25 13:44:31 -0500472 struct dentry *ls_debug_rsb_dentry; /* debugfs */
473 struct dentry *ls_debug_waiters_dentry; /* debugfs */
David Teiglandac90a252007-07-06 09:47:08 -0500474 struct dentry *ls_debug_locks_dentry; /* debugfs */
David Teiglande7fd4172006-01-18 09:30:29 +0000475
476 wait_queue_head_t ls_uevent_wait; /* user part of join/leave */
477 int ls_uevent_result;
David Teigland8b0e7b22007-05-18 09:03:35 -0500478 struct completion ls_members_done;
479 int ls_members_result;
David Teiglande7fd4172006-01-18 09:30:29 +0000480
David Teigland597d0ca2006-07-12 16:44:04 -0500481 struct miscdevice ls_device;
482
David Teiglande7fd4172006-01-18 09:30:29 +0000483 /* recovery related */
484
485 struct timer_list ls_timer;
486 struct task_struct *ls_recoverd_task;
David Teigland90135922006-01-20 08:47:07 +0000487 struct mutex ls_recoverd_active;
David Teiglande7fd4172006-01-18 09:30:29 +0000488 spinlock_t ls_recover_lock;
David Teigland3ae1acf2007-05-18 08:59:31 -0500489 unsigned long ls_recover_begin; /* jiffies timestamp */
David Teiglande7fd4172006-01-18 09:30:29 +0000490 uint32_t ls_recover_status; /* DLM_RS_ */
491 uint64_t ls_recover_seq;
492 struct dlm_recover *ls_recover_args;
493 struct rw_semaphore ls_in_recovery; /* block local requests */
494 struct list_head ls_requestqueue;/* queue remote requests */
David Teigland90135922006-01-20 08:47:07 +0000495 struct mutex ls_requestqueue_mutex;
David Teiglande7fd4172006-01-18 09:30:29 +0000496 char *ls_recover_buf;
David Teiglandfaa0f262006-08-08 17:08:42 -0500497 int ls_recover_nodeid; /* for debugging */
David Teigland4a99c3d2006-08-09 11:20:15 -0500498 uint64_t ls_rcom_seq;
David Teigland98f176f2006-11-27 13:19:28 -0600499 spinlock_t ls_rcom_spin;
David Teiglande7fd4172006-01-18 09:30:29 +0000500 struct list_head ls_recover_list;
501 spinlock_t ls_recover_list_lock;
502 int ls_recover_list_count;
503 wait_queue_head_t ls_wait_general;
David Teigland597d0ca2006-07-12 16:44:04 -0500504 struct mutex ls_clear_proc_locks;
David Teiglande7fd4172006-01-18 09:30:29 +0000505
506 struct list_head ls_root_list; /* root resources */
507 struct rw_semaphore ls_root_sem; /* protect root_list */
508
509 int ls_namelen;
510 char ls_name[1];
511};
512
513#define LSFL_WORK 0
514#define LSFL_RUNNING 1
515#define LSFL_RECOVERY_STOP 2
516#define LSFL_RCOM_READY 3
David Teigland98f176f2006-11-27 13:19:28 -0600517#define LSFL_RCOM_WAIT 4
518#define LSFL_UEVENT_WAIT 5
David Teigland3ae1acf2007-05-18 08:59:31 -0500519#define LSFL_TIMEWARN 6
David Teiglande7fd4172006-01-18 09:30:29 +0000520
David Teigland597d0ca2006-07-12 16:44:04 -0500521/* much of this is just saving user space pointers associated with the
522 lock that we pass back to the user lib with an ast */
523
524struct dlm_user_args {
525 struct dlm_user_proc *proc; /* each process that opens the lockspace
526 device has private data
527 (dlm_user_proc) on the struct file,
528 the process's locks point back to it*/
529 struct dlm_lksb lksb;
530 int old_mode;
531 int update_user_lvb;
532 struct dlm_lksb __user *user_lksb;
533 void __user *castparam;
534 void __user *castaddr;
535 void __user *bastparam;
536 void __user *bastaddr;
David Teiglandd7db9232007-05-18 09:00:32 -0500537 uint64_t xid;
David Teigland597d0ca2006-07-12 16:44:04 -0500538};
539
540#define DLM_PROC_FLAGS_CLOSING 1
541#define DLM_PROC_FLAGS_COMPAT 2
542
543/* locks list is kept so we can remove all a process's locks when it
544 exits (or orphan those that are persistent) */
545
546struct dlm_user_proc {
547 dlm_lockspace_t *lockspace;
548 unsigned long flags; /* DLM_PROC_FLAGS */
549 struct list_head asts;
550 spinlock_t asts_spin;
551 struct list_head locks;
552 spinlock_t locks_spin;
David Teiglanda1bc86e2007-01-15 10:34:52 -0600553 struct list_head unlocking;
David Teigland597d0ca2006-07-12 16:44:04 -0500554 wait_queue_head_t wait;
555};
556
David Teiglande7fd4172006-01-18 09:30:29 +0000557static inline int dlm_locking_stopped(struct dlm_ls *ls)
558{
559 return !test_bit(LSFL_RUNNING, &ls->ls_flags);
560}
561
562static inline int dlm_recovery_stopped(struct dlm_ls *ls)
563{
564 return test_bit(LSFL_RECOVERY_STOP, &ls->ls_flags);
565}
566
567static inline int dlm_no_directory(struct dlm_ls *ls)
568{
569 return (ls->ls_exflags & DLM_LSFL_NODIR) ? 1 : 0;
570}
571
572#endif /* __DLM_INTERNAL_DOT_H__ */
573