• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 /******************************************************************************
2 *******************************************************************************
3 **
4 **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
5 **  Copyright (C) 2004-2011 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 <linux/idr.h>
41 #include <asm/uaccess.h>
42 
43 #include <linux/dlm.h>
44 #include "config.h"
45 
46 /* Size of the temp buffer midcomms allocates on the stack.
47    We try to make this large enough so most messages fit.
48    FIXME: should sctp make this unnecessary? */
49 
50 #define DLM_INBUF_LEN		148
51 
52 struct dlm_ls;
53 struct dlm_lkb;
54 struct dlm_rsb;
55 struct dlm_member;
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 rb_root		keep;
107 	struct rb_root		toss;
108 	spinlock_t		lock;
109 };
110 
111 
112 /*
113  * Lockspace member (per node in a ls)
114  */
115 
116 struct dlm_member {
117 	struct list_head	list;
118 	int			nodeid;
119 	int			weight;
120 	int			slot;
121 	int			slot_prev;
122 	int			comm_seq;
123 	uint32_t		generation;
124 };
125 
126 /*
127  * Save and manage recovery state for a lockspace.
128  */
129 
130 struct dlm_recover {
131 	struct list_head	list;
132 	struct dlm_config_node	*nodes;
133 	int			nodes_count;
134 	uint64_t		seq;
135 };
136 
137 /*
138  * Pass input args to second stage locking function.
139  */
140 
141 struct dlm_args {
142 	uint32_t		flags;
143 	void			(*astfn) (void *astparam);
144 	void			*astparam;
145 	void			(*bastfn) (void *astparam, int mode);
146 	int			mode;
147 	struct dlm_lksb		*lksb;
148 	unsigned long		timeout;
149 };
150 
151 
152 /*
153  * Lock block
154  *
155  * A lock can be one of three types:
156  *
157  * local copy      lock is mastered locally
158  *                 (lkb_nodeid is zero and DLM_LKF_MSTCPY is not set)
159  * process copy    lock is mastered on a remote node
160  *                 (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is not set)
161  * master copy     master node's copy of a lock owned by remote node
162  *                 (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is set)
163  *
164  * lkb_exflags: a copy of the most recent flags arg provided to dlm_lock or
165  * dlm_unlock.  The dlm does not modify these or use any private flags in
166  * this field; it only contains DLM_LKF_ flags from dlm.h.  These flags
167  * are sent as-is to the remote master when the lock is remote.
168  *
169  * lkb_flags: internal dlm flags (DLM_IFL_ prefix) from dlm_internal.h.
170  * Some internal flags are shared between the master and process nodes;
171  * these shared flags are kept in the lower two bytes.  One of these
172  * flags set on the master copy will be propagated to the process copy
173  * and v.v.  Other internal flags are private to the master or process
174  * node (e.g. DLM_IFL_MSTCPY).  These are kept in the high two bytes.
175  *
176  * lkb_sbflags: status block flags.  These flags are copied directly into
177  * the caller's lksb.sb_flags prior to the dlm_lock/dlm_unlock completion
178  * ast.  All defined in dlm.h with DLM_SBF_ prefix.
179  *
180  * lkb_status: the lock status indicates which rsb queue the lock is
181  * on, grant, convert, or wait.  DLM_LKSTS_ WAITING/GRANTED/CONVERT
182  *
183  * lkb_wait_type: the dlm message type (DLM_MSG_ prefix) for which a
184  * reply is needed.  Only set when the lkb is on the lockspace waiters
185  * list awaiting a reply from a remote node.
186  *
187  * lkb_nodeid: when the lkb is a local copy, nodeid is 0; when the lkb
188  * is a master copy, nodeid specifies the remote lock holder, when the
189  * lkb is a process copy, the nodeid specifies the lock master.
190  */
191 
192 /* lkb_status */
193 
194 #define DLM_LKSTS_WAITING	1
195 #define DLM_LKSTS_GRANTED	2
196 #define DLM_LKSTS_CONVERT	3
197 
198 /* lkb_flags */
199 
200 #define DLM_IFL_MSTCPY		0x00010000
201 #define DLM_IFL_RESEND		0x00020000
202 #define DLM_IFL_DEAD		0x00040000
203 #define DLM_IFL_OVERLAP_UNLOCK  0x00080000
204 #define DLM_IFL_OVERLAP_CANCEL  0x00100000
205 #define DLM_IFL_ENDOFLIFE	0x00200000
206 #define DLM_IFL_WATCH_TIMEWARN	0x00400000
207 #define DLM_IFL_TIMEOUT_CANCEL	0x00800000
208 #define DLM_IFL_DEADLOCK_CANCEL	0x01000000
209 #define DLM_IFL_STUB_MS		0x02000000 /* magic number for m_flags */
210 #define DLM_IFL_USER		0x00000001
211 #define DLM_IFL_ORPHAN		0x00000002
212 
213 #define DLM_CALLBACKS_SIZE	6
214 
215 #define DLM_CB_CAST		0x00000001
216 #define DLM_CB_BAST		0x00000002
217 #define DLM_CB_SKIP		0x00000004
218 
219 struct dlm_callback {
220 	uint64_t		seq;
221 	uint32_t		flags;		/* DLM_CBF_ */
222 	int			sb_status;	/* copy to lksb status */
223 	uint8_t			sb_flags;	/* copy to lksb flags */
224 	int8_t			mode; /* rq mode of bast, gr mode of cast */
225 };
226 
227 struct dlm_lkb {
228 	struct dlm_rsb		*lkb_resource;	/* the rsb */
229 	struct kref		lkb_ref;
230 	int			lkb_nodeid;	/* copied from rsb */
231 	int			lkb_ownpid;	/* pid of lock owner */
232 	uint32_t		lkb_id;		/* our lock ID */
233 	uint32_t		lkb_remid;	/* lock ID on remote partner */
234 	uint32_t		lkb_exflags;	/* external flags from caller */
235 	uint32_t		lkb_sbflags;	/* lksb flags */
236 	uint32_t		lkb_flags;	/* internal flags */
237 	uint32_t		lkb_lvbseq;	/* lvb sequence number */
238 
239 	int8_t			lkb_status;     /* granted, waiting, convert */
240 	int8_t			lkb_rqmode;	/* requested lock mode */
241 	int8_t			lkb_grmode;	/* granted lock mode */
242 	int8_t			lkb_highbast;	/* highest mode bast sent for */
243 
244 	int8_t			lkb_wait_type;	/* type of reply waiting for */
245 	int8_t			lkb_wait_count;
246 	int			lkb_wait_nodeid; /* for debugging */
247 
248 	struct list_head	lkb_statequeue;	/* rsb g/c/w list */
249 	struct list_head	lkb_rsb_lookup;	/* waiting for rsb lookup */
250 	struct list_head	lkb_wait_reply;	/* waiting for remote reply */
251 	struct list_head	lkb_ownqueue;	/* list of locks for a process */
252 	struct list_head	lkb_time_list;
253 	ktime_t			lkb_timestamp;
254 	ktime_t			lkb_wait_time;
255 	unsigned long		lkb_timeout_cs;
256 
257 	struct mutex		lkb_cb_mutex;
258 	struct work_struct	lkb_cb_work;
259 	struct list_head	lkb_cb_list; /* for ls_cb_delay or proc->asts */
260 	struct dlm_callback	lkb_callbacks[DLM_CALLBACKS_SIZE];
261 	struct dlm_callback	lkb_last_cast;
262 	struct dlm_callback	lkb_last_bast;
263 	ktime_t			lkb_last_cast_time;	/* for debugging */
264 	ktime_t			lkb_last_bast_time;	/* for debugging */
265 
266 	char			*lkb_lvbptr;
267 	struct dlm_lksb		*lkb_lksb;      /* caller's status block */
268 	void			(*lkb_astfn) (void *astparam);
269 	void			(*lkb_bastfn) (void *astparam, int mode);
270 	union {
271 		void			*lkb_astparam;	/* caller's ast arg */
272 		struct dlm_user_args	*lkb_ua;
273 	};
274 };
275 
276 
277 struct dlm_rsb {
278 	struct dlm_ls		*res_ls;	/* the lockspace */
279 	struct kref		res_ref;
280 	struct mutex		res_mutex;
281 	unsigned long		res_flags;
282 	int			res_length;	/* length of rsb name */
283 	int			res_nodeid;
284 	uint32_t                res_lvbseq;
285 	uint32_t		res_hash;
286 	uint32_t		res_bucket;	/* rsbtbl */
287 	unsigned long		res_toss_time;
288 	uint32_t		res_first_lkid;
289 	struct list_head	res_lookup;	/* lkbs waiting on first */
290 	union {
291 		struct list_head	res_hashchain;
292 		struct rb_node		res_hashnode;	/* rsbtbl */
293 	};
294 	struct list_head	res_grantqueue;
295 	struct list_head	res_convertqueue;
296 	struct list_head	res_waitqueue;
297 
298 	struct list_head	res_root_list;	    /* used for recovery */
299 	struct list_head	res_recover_list;   /* used for recovery */
300 	int			res_recover_locks_count;
301 
302 	char			*res_lvbptr;
303 	char			res_name[DLM_RESNAME_MAXLEN+1];
304 };
305 
306 /* find_rsb() flags */
307 
308 #define R_MASTER		1	/* only return rsb if it's a master */
309 #define R_CREATE		2	/* create/add rsb if not found */
310 
311 /* rsb_flags */
312 
313 enum rsb_flags {
314 	RSB_MASTER_UNCERTAIN,
315 	RSB_VALNOTVALID,
316 	RSB_VALNOTVALID_PREV,
317 	RSB_NEW_MASTER,
318 	RSB_NEW_MASTER2,
319 	RSB_RECOVER_CONVERT,
320 	RSB_LOCKS_PURGED,
321 };
322 
rsb_set_flag(struct dlm_rsb * r,enum rsb_flags flag)323 static inline void rsb_set_flag(struct dlm_rsb *r, enum rsb_flags flag)
324 {
325 	__set_bit(flag, &r->res_flags);
326 }
327 
rsb_clear_flag(struct dlm_rsb * r,enum rsb_flags flag)328 static inline void rsb_clear_flag(struct dlm_rsb *r, enum rsb_flags flag)
329 {
330 	__clear_bit(flag, &r->res_flags);
331 }
332 
rsb_flag(struct dlm_rsb * r,enum rsb_flags flag)333 static inline int rsb_flag(struct dlm_rsb *r, enum rsb_flags flag)
334 {
335 	return test_bit(flag, &r->res_flags);
336 }
337 
338 
339 /* dlm_header is first element of all structs sent between nodes */
340 
341 #define DLM_HEADER_MAJOR	0x00030000
342 #define DLM_HEADER_MINOR	0x00000001
343 
344 #define DLM_HEADER_SLOTS	0x00000001
345 
346 #define DLM_MSG			1
347 #define DLM_RCOM		2
348 
349 struct dlm_header {
350 	uint32_t		h_version;
351 	uint32_t		h_lockspace;
352 	uint32_t		h_nodeid;	/* nodeid of sender */
353 	uint16_t		h_length;
354 	uint8_t			h_cmd;		/* DLM_MSG, DLM_RCOM */
355 	uint8_t			h_pad;
356 };
357 
358 
359 #define DLM_MSG_REQUEST		1
360 #define DLM_MSG_CONVERT		2
361 #define DLM_MSG_UNLOCK		3
362 #define DLM_MSG_CANCEL		4
363 #define DLM_MSG_REQUEST_REPLY	5
364 #define DLM_MSG_CONVERT_REPLY	6
365 #define DLM_MSG_UNLOCK_REPLY	7
366 #define DLM_MSG_CANCEL_REPLY	8
367 #define DLM_MSG_GRANT		9
368 #define DLM_MSG_BAST		10
369 #define DLM_MSG_LOOKUP		11
370 #define DLM_MSG_REMOVE		12
371 #define DLM_MSG_LOOKUP_REPLY	13
372 #define DLM_MSG_PURGE		14
373 
374 struct dlm_message {
375 	struct dlm_header	m_header;
376 	uint32_t		m_type;		/* DLM_MSG_ */
377 	uint32_t		m_nodeid;
378 	uint32_t		m_pid;
379 	uint32_t		m_lkid;		/* lkid on sender */
380 	uint32_t		m_remid;	/* lkid on receiver */
381 	uint32_t		m_parent_lkid;
382 	uint32_t		m_parent_remid;
383 	uint32_t		m_exflags;
384 	uint32_t		m_sbflags;
385 	uint32_t		m_flags;
386 	uint32_t		m_lvbseq;
387 	uint32_t		m_hash;
388 	int			m_status;
389 	int			m_grmode;
390 	int			m_rqmode;
391 	int			m_bastmode;
392 	int			m_asts;
393 	int			m_result;	/* 0 or -EXXX */
394 	char			m_extra[0];	/* name or lvb */
395 };
396 
397 
398 #define DLM_RS_NODES		0x00000001
399 #define DLM_RS_NODES_ALL	0x00000002
400 #define DLM_RS_DIR		0x00000004
401 #define DLM_RS_DIR_ALL		0x00000008
402 #define DLM_RS_LOCKS		0x00000010
403 #define DLM_RS_LOCKS_ALL	0x00000020
404 #define DLM_RS_DONE		0x00000040
405 #define DLM_RS_DONE_ALL		0x00000080
406 
407 #define DLM_RCOM_STATUS		1
408 #define DLM_RCOM_NAMES		2
409 #define DLM_RCOM_LOOKUP		3
410 #define DLM_RCOM_LOCK		4
411 #define DLM_RCOM_STATUS_REPLY	5
412 #define DLM_RCOM_NAMES_REPLY	6
413 #define DLM_RCOM_LOOKUP_REPLY	7
414 #define DLM_RCOM_LOCK_REPLY	8
415 
416 struct dlm_rcom {
417 	struct dlm_header	rc_header;
418 	uint32_t		rc_type;	/* DLM_RCOM_ */
419 	int			rc_result;	/* multi-purpose */
420 	uint64_t		rc_id;		/* match reply with request */
421 	uint64_t		rc_seq;		/* sender's ls_recover_seq */
422 	uint64_t		rc_seq_reply;	/* remote ls_recover_seq */
423 	char			rc_buf[0];
424 };
425 
426 union dlm_packet {
427 	struct dlm_header	header;		/* common to other two */
428 	struct dlm_message	message;
429 	struct dlm_rcom		rcom;
430 };
431 
432 #define DLM_RSF_NEED_SLOTS	0x00000001
433 
434 /* RCOM_STATUS data */
435 struct rcom_status {
436 	__le32			rs_flags;
437 	__le32			rs_unused1;
438 	__le64			rs_unused2;
439 };
440 
441 /* RCOM_STATUS_REPLY data */
442 struct rcom_config {
443 	__le32			rf_lvblen;
444 	__le32			rf_lsflags;
445 
446 	/* DLM_HEADER_SLOTS adds: */
447 	__le32			rf_flags;
448 	__le16			rf_our_slot;
449 	__le16			rf_num_slots;
450 	__le32			rf_generation;
451 	__le32			rf_unused1;
452 	__le64			rf_unused2;
453 };
454 
455 struct rcom_slot {
456 	__le32			ro_nodeid;
457 	__le16			ro_slot;
458 	__le16			ro_unused1;
459 	__le64			ro_unused2;
460 };
461 
462 struct rcom_lock {
463 	__le32			rl_ownpid;
464 	__le32			rl_lkid;
465 	__le32			rl_remid;
466 	__le32			rl_parent_lkid;
467 	__le32			rl_parent_remid;
468 	__le32			rl_exflags;
469 	__le32			rl_flags;
470 	__le32			rl_lvbseq;
471 	__le32			rl_result;
472 	int8_t			rl_rqmode;
473 	int8_t			rl_grmode;
474 	int8_t			rl_status;
475 	int8_t			rl_asts;
476 	__le16			rl_wait_type;
477 	__le16			rl_namelen;
478 	char			rl_name[DLM_RESNAME_MAXLEN];
479 	char			rl_lvb[0];
480 };
481 
482 struct dlm_ls {
483 	struct list_head	ls_list;	/* list of lockspaces */
484 	dlm_lockspace_t		*ls_local_handle;
485 	uint32_t		ls_global_id;	/* global unique lockspace ID */
486 	uint32_t		ls_generation;
487 	uint32_t		ls_exflags;
488 	int			ls_lvblen;
489 	int			ls_count;	/* refcount of processes in
490 						   the dlm using this ls */
491 	int			ls_create_count; /* create/release refcount */
492 	unsigned long		ls_flags;	/* LSFL_ */
493 	unsigned long		ls_scan_time;
494 	struct kobject		ls_kobj;
495 
496 	struct idr		ls_lkbidr;
497 	spinlock_t		ls_lkbidr_spin;
498 
499 	struct dlm_rsbtable	*ls_rsbtbl;
500 	uint32_t		ls_rsbtbl_size;
501 
502 	struct dlm_dirtable	*ls_dirtbl;
503 	uint32_t		ls_dirtbl_size;
504 
505 	struct mutex		ls_waiters_mutex;
506 	struct list_head	ls_waiters;	/* lkbs needing a reply */
507 
508 	struct mutex		ls_orphans_mutex;
509 	struct list_head	ls_orphans;
510 
511 	struct mutex		ls_timeout_mutex;
512 	struct list_head	ls_timeout;
513 
514 	spinlock_t		ls_new_rsb_spin;
515 	int			ls_new_rsb_count;
516 	struct list_head	ls_new_rsb;	/* new rsb structs */
517 
518 	struct list_head	ls_nodes;	/* current nodes in ls */
519 	struct list_head	ls_nodes_gone;	/* dead node list, recovery */
520 	int			ls_num_nodes;	/* number of nodes in ls */
521 	int			ls_low_nodeid;
522 	int			ls_total_weight;
523 	int			*ls_node_array;
524 
525 	int			ls_slot;
526 	int			ls_num_slots;
527 	int			ls_slots_size;
528 	struct dlm_slot		*ls_slots;
529 
530 	struct dlm_rsb		ls_stub_rsb;	/* for returning errors */
531 	struct dlm_lkb		ls_stub_lkb;	/* for returning errors */
532 	struct dlm_message	ls_stub_ms;	/* for faking a reply */
533 
534 	struct dentry		*ls_debug_rsb_dentry; /* debugfs */
535 	struct dentry		*ls_debug_waiters_dentry; /* debugfs */
536 	struct dentry		*ls_debug_locks_dentry; /* debugfs */
537 	struct dentry		*ls_debug_all_dentry; /* debugfs */
538 
539 	wait_queue_head_t	ls_uevent_wait;	/* user part of join/leave */
540 	int			ls_uevent_result;
541 	struct completion	ls_members_done;
542 	int			ls_members_result;
543 
544 	struct miscdevice       ls_device;
545 
546 	struct workqueue_struct	*ls_callback_wq;
547 
548 	/* recovery related */
549 
550 	struct mutex		ls_cb_mutex;
551 	struct list_head	ls_cb_delay; /* save for queue_work later */
552 	struct timer_list	ls_timer;
553 	struct task_struct	*ls_recoverd_task;
554 	struct mutex		ls_recoverd_active;
555 	spinlock_t		ls_recover_lock;
556 	unsigned long		ls_recover_begin; /* jiffies timestamp */
557 	uint32_t		ls_recover_status; /* DLM_RS_ */
558 	uint64_t		ls_recover_seq;
559 	struct dlm_recover	*ls_recover_args;
560 	struct rw_semaphore	ls_in_recovery;	/* block local requests */
561 	struct rw_semaphore	ls_recv_active;	/* block dlm_recv */
562 	struct list_head	ls_requestqueue;/* queue remote requests */
563 	struct mutex		ls_requestqueue_mutex;
564 	struct dlm_rcom		*ls_recover_buf;
565 	int			ls_recover_nodeid; /* for debugging */
566 	uint64_t		ls_rcom_seq;
567 	spinlock_t		ls_rcom_spin;
568 	struct list_head	ls_recover_list;
569 	spinlock_t		ls_recover_list_lock;
570 	int			ls_recover_list_count;
571 	wait_queue_head_t	ls_wait_general;
572 	struct mutex		ls_clear_proc_locks;
573 
574 	struct list_head	ls_root_list;	/* root resources */
575 	struct rw_semaphore	ls_root_sem;	/* protect root_list */
576 
577 	const struct dlm_lockspace_ops *ls_ops;
578 	void			*ls_ops_arg;
579 
580 	int			ls_namelen;
581 	char			ls_name[1];
582 };
583 
584 #define LSFL_WORK		0
585 #define LSFL_RUNNING		1
586 #define LSFL_RECOVERY_STOP	2
587 #define LSFL_RCOM_READY		3
588 #define LSFL_RCOM_WAIT		4
589 #define LSFL_UEVENT_WAIT	5
590 #define LSFL_TIMEWARN		6
591 #define LSFL_CB_DELAY		7
592 
593 /* much of this is just saving user space pointers associated with the
594    lock that we pass back to the user lib with an ast */
595 
596 struct dlm_user_args {
597 	struct dlm_user_proc	*proc; /* each process that opens the lockspace
598 					  device has private data
599 					  (dlm_user_proc) on the struct file,
600 					  the process's locks point back to it*/
601 	struct dlm_lksb		lksb;
602 	struct dlm_lksb __user	*user_lksb;
603 	void __user		*castparam;
604 	void __user		*castaddr;
605 	void __user		*bastparam;
606 	void __user		*bastaddr;
607 	uint64_t		xid;
608 };
609 
610 #define DLM_PROC_FLAGS_CLOSING 1
611 #define DLM_PROC_FLAGS_COMPAT  2
612 
613 /* locks list is kept so we can remove all a process's locks when it
614    exits (or orphan those that are persistent) */
615 
616 struct dlm_user_proc {
617 	dlm_lockspace_t		*lockspace;
618 	unsigned long		flags; /* DLM_PROC_FLAGS */
619 	struct list_head	asts;
620 	spinlock_t		asts_spin;
621 	struct list_head	locks;
622 	spinlock_t		locks_spin;
623 	struct list_head	unlocking;
624 	wait_queue_head_t	wait;
625 };
626 
dlm_locking_stopped(struct dlm_ls * ls)627 static inline int dlm_locking_stopped(struct dlm_ls *ls)
628 {
629 	return !test_bit(LSFL_RUNNING, &ls->ls_flags);
630 }
631 
dlm_recovery_stopped(struct dlm_ls * ls)632 static inline int dlm_recovery_stopped(struct dlm_ls *ls)
633 {
634 	return test_bit(LSFL_RECOVERY_STOP, &ls->ls_flags);
635 }
636 
dlm_no_directory(struct dlm_ls * ls)637 static inline int dlm_no_directory(struct dlm_ls *ls)
638 {
639 	return (ls->ls_exflags & DLM_LSFL_NODIR) ? 1 : 0;
640 }
641 
642 int dlm_netlink_init(void);
643 void dlm_netlink_exit(void);
644 void dlm_timeout_warn(struct dlm_lkb *lkb);
645 int dlm_plock_init(void);
646 void dlm_plock_exit(void);
647 
648 #ifdef CONFIG_DLM_DEBUG
649 int dlm_register_debugfs(void);
650 void dlm_unregister_debugfs(void);
651 int dlm_create_debug_file(struct dlm_ls *ls);
652 void dlm_delete_debug_file(struct dlm_ls *ls);
653 #else
dlm_register_debugfs(void)654 static inline int dlm_register_debugfs(void) { return 0; }
dlm_unregister_debugfs(void)655 static inline void dlm_unregister_debugfs(void) { }
dlm_create_debug_file(struct dlm_ls * ls)656 static inline int dlm_create_debug_file(struct dlm_ls *ls) { return 0; }
dlm_delete_debug_file(struct dlm_ls * ls)657 static inline void dlm_delete_debug_file(struct dlm_ls *ls) { }
658 #endif
659 
660 #endif				/* __DLM_INTERNAL_DOT_H__ */
661 
662