1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /******************************************************************************
3 *******************************************************************************
5 ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
6 ** Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved.
9 *******************************************************************************
10 ******************************************************************************/
12 #ifndef __DLM_INTERNAL_DOT_H__
13 #define __DLM_INTERNAL_DOT_H__
16 * This is the main header file to be included in each DLM source file.
19 #include <uapi/linux/dlm_device.h>
20 #include <linux/slab.h>
21 #include <linux/sched.h>
22 #include <linux/types.h>
23 #include <linux/ctype.h>
24 #include <linux/spinlock.h>
25 #include <linux/vmalloc.h>
26 #include <linux/list.h>
27 #include <linux/errno.h>
28 #include <linux/random.h>
29 #include <linux/delay.h>
30 #include <linux/socket.h>
31 #include <linux/kthread.h>
32 #include <linux/kobject.h>
33 #include <linux/kref.h>
34 #include <linux/kernel.h>
35 #include <linux/jhash.h>
36 #include <linux/miscdevice.h>
37 #include <linux/rhashtable.h>
38 #include <linux/mutex.h>
39 #include <linux/xarray.h>
40 #include <linux/ratelimit.h>
41 #include <linux/uaccess.h>
43 #include <linux/dlm.h>
58 #define log_print(fmt, args...) \
59 printk(KERN_ERR "dlm: "fmt"\n" , ##args)
60 #define log_print_ratelimited(fmt, args...) \
61 printk_ratelimited(KERN_ERR "dlm: "fmt"\n", ##args)
62 #define log_error(ls, fmt, args...) \
63 printk(KERN_ERR "dlm: %s: " fmt "\n", (ls)->ls_name , ##args)
65 #define log_rinfo(ls, fmt, args...) \
67 if (dlm_config.ci_log_info) \
68 printk(KERN_INFO "dlm: %s: " fmt "\n", \
69 (ls)->ls_name, ##args); \
70 else if (dlm_config.ci_log_debug) \
71 printk(KERN_DEBUG "dlm: %s: " fmt "\n", \
72 (ls)->ls_name , ##args); \
75 #define log_debug(ls, fmt, args...) \
77 if (dlm_config.ci_log_debug) \
78 printk(KERN_DEBUG "dlm: %s: " fmt "\n", \
79 (ls)->ls_name , ##args); \
82 #define log_limit(ls, fmt, args...) \
84 if (dlm_config.ci_log_debug) \
85 printk_ratelimited(KERN_DEBUG "dlm: %s: " fmt "\n", \
86 (ls)->ls_name , ##args); \
89 #define DLM_ASSERT(x, do) \
93 printk(KERN_ERR "\nDLM: Assertion failed on line %d of file %s\n" \
94 "DLM: assertion: \"%s\"\n" \
95 "DLM: time = %lu\n", \
96 __LINE__, __FILE__, #x, jiffies); \
99 panic("DLM: Record message above and reboot.\n"); \
104 * Lockspace member (per node in a ls)
108 struct list_head list;
118 * Save and manage recovery state for a lockspace.
122 struct list_head list;
123 struct dlm_config_node *nodes;
129 * Pass input args to second stage locking function.
134 void (*astfn) (void *astparam);
136 void (*bastfn) (void *astparam, int mode);
138 struct dlm_lksb *lksb;
145 * A lock can be one of three types:
147 * local copy lock is mastered locally
148 * (lkb_nodeid is zero and DLM_LKF_MSTCPY is not set)
149 * process copy lock is mastered on a remote node
150 * (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is not set)
151 * master copy master node's copy of a lock owned by remote node
152 * (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is set)
154 * lkb_exflags: a copy of the most recent flags arg provided to dlm_lock or
155 * dlm_unlock. The dlm does not modify these or use any private flags in
156 * this field; it only contains DLM_LKF_ flags from dlm.h. These flags
157 * are sent as-is to the remote master when the lock is remote.
159 * lkb_flags: internal dlm flags (DLM_IFL_ prefix) from dlm_internal.h.
160 * Some internal flags are shared between the master and process nodes;
161 * these shared flags are kept in the lower two bytes. One of these
162 * flags set on the master copy will be propagated to the process copy
163 * and v.v. Other internal flags are private to the master or process
164 * node (e.g. DLM_IFL_MSTCPY). These are kept in the high two bytes.
166 * lkb_sbflags: status block flags. These flags are copied directly into
167 * the caller's lksb.sb_flags prior to the dlm_lock/dlm_unlock completion
168 * ast. All defined in dlm.h with DLM_SBF_ prefix.
170 * lkb_status: the lock status indicates which rsb queue the lock is
171 * on, grant, convert, or wait. DLM_LKSTS_ WAITING/GRANTED/CONVERT
173 * lkb_wait_type: the dlm message type (DLM_MSG_ prefix) for which a
174 * reply is needed. Only set when the lkb is on the lockspace waiters
175 * list awaiting a reply from a remote node.
177 * lkb_nodeid: when the lkb is a local copy, nodeid is 0; when the lkb
178 * is a master copy, nodeid specifies the remote lock holder, when the
179 * lkb is a process copy, the nodeid specifies the lock master.
184 #define DLM_LKSTS_WAITING 1
185 #define DLM_LKSTS_GRANTED 2
186 #define DLM_LKSTS_CONVERT 3
190 #define DLM_IFL_MSTCPY_BIT 16
191 #define __DLM_IFL_MIN_BIT DLM_IFL_MSTCPY_BIT
192 #define DLM_IFL_RESEND_BIT 17
193 #define DLM_IFL_DEAD_BIT 18
194 #define DLM_IFL_OVERLAP_UNLOCK_BIT 19
195 #define DLM_IFL_OVERLAP_CANCEL_BIT 20
196 #define DLM_IFL_ENDOFLIFE_BIT 21
197 #define DLM_IFL_DEADLOCK_CANCEL_BIT 24
198 #define __DLM_IFL_MAX_BIT DLM_IFL_DEADLOCK_CANCEL_BIT
202 #define DLM_DFL_USER_BIT 0
203 #define __DLM_DFL_MIN_BIT DLM_DFL_USER_BIT
204 #define DLM_DFL_ORPHAN_BIT 1
205 #define __DLM_DFL_MAX_BIT DLM_DFL_ORPHAN_BIT
207 #define DLM_CB_CAST 0x00000001
208 #define DLM_CB_BAST 0x00000002
210 /* much of this is just saving user space pointers associated with the
211 * lock that we pass back to the user lib with an ast
214 struct dlm_user_args {
215 struct dlm_user_proc *proc; /* each process that opens the lockspace
216 * device has private data
217 * (dlm_user_proc) on the struct file,
218 * the process's locks point back to it
220 struct dlm_lksb lksb;
221 struct dlm_lksb __user *user_lksb;
222 void __user *castparam;
223 void __user *castaddr;
224 void __user *bastparam;
225 void __user *bastaddr;
229 struct dlm_callback {
230 uint32_t flags; /* DLM_CBF_ */
231 int sb_status; /* copy to lksb status */
232 uint8_t sb_flags; /* copy to lksb flags */
233 int8_t mode; /* rq mode of bast, gr mode of cast */
235 struct dlm_lksb *lkb_lksb;
236 unsigned char lvbptr[DLM_USER_LVB_LEN];
239 void *astparam; /* caller's ast arg */
240 struct dlm_user_args ua;
242 struct work_struct work;
243 void (*bastfn)(void *astparam, int mode);
244 void (*astfn)(void *astparam);
245 char res_name[DLM_RESNAME_MAXLEN];
250 struct list_head list;
254 struct dlm_rsb *lkb_resource; /* the rsb */
256 int lkb_nodeid; /* copied from rsb */
257 int lkb_ownpid; /* pid of lock owner */
258 uint32_t lkb_id; /* our lock ID */
259 uint32_t lkb_remid; /* lock ID on remote partner */
260 uint32_t lkb_exflags; /* external flags from caller */
261 unsigned long lkb_sbflags; /* lksb flags */
262 unsigned long lkb_dflags; /* distributed flags */
263 unsigned long lkb_iflags; /* internal flags */
264 uint32_t lkb_lvbseq; /* lvb sequence number */
266 int8_t lkb_status; /* granted, waiting, convert */
267 int8_t lkb_rqmode; /* requested lock mode */
268 int8_t lkb_grmode; /* granted lock mode */
269 int8_t lkb_highbast; /* highest mode bast sent for */
271 int8_t lkb_wait_type; /* type of reply waiting for */
272 int8_t lkb_wait_count;
273 int lkb_wait_nodeid; /* for debugging */
275 struct list_head lkb_statequeue; /* rsb g/c/w list */
276 struct list_head lkb_rsb_lookup; /* waiting for rsb lookup */
277 struct list_head lkb_wait_reply; /* waiting for remote reply */
278 struct list_head lkb_ownqueue; /* list of locks for a process */
279 ktime_t lkb_timestamp;
281 int8_t lkb_last_cast_cb_mode;
282 int8_t lkb_last_bast_cb_mode;
283 int8_t lkb_last_cb_mode;
284 uint8_t lkb_last_cb_flags;
285 ktime_t lkb_last_cast_time; /* for debugging */
286 ktime_t lkb_last_bast_time; /* for debugging */
288 uint64_t lkb_recover_seq; /* from ls_recover_seq */
291 struct dlm_lksb *lkb_lksb; /* caller's status block */
292 void (*lkb_astfn) (void *astparam);
293 void (*lkb_bastfn) (void *astparam, int mode);
295 void *lkb_astparam; /* caller's ast arg */
296 struct dlm_user_args *lkb_ua;
302 * res_master_nodeid is "normal": 0 is unset/invalid, non-zero is the real
303 * nodeid, even when nodeid is our_nodeid.
305 * res_nodeid is "odd": -1 is unset/invalid, zero means our_nodeid,
306 * greater than zero when another nodeid.
308 * (TODO: remove res_nodeid and only use res_master_nodeid)
312 struct dlm_ls *res_ls; /* the lockspace */
315 unsigned long res_flags;
316 int res_length; /* length of rsb name */
318 int res_master_nodeid;
320 unsigned long res_id; /* for ls_recover_xa */
323 unsigned long res_toss_time;
324 uint32_t res_first_lkid;
325 struct list_head res_lookup; /* lkbs waiting on first */
326 struct rhash_head res_node; /* rsbtbl */
327 struct list_head res_grantqueue;
328 struct list_head res_convertqueue;
329 struct list_head res_waitqueue;
331 struct list_head res_slow_list; /* ls_slow_* */
332 struct list_head res_scan_list;
333 struct list_head res_root_list; /* used for recovery */
334 struct list_head res_masters_list; /* used for recovery */
335 struct list_head res_recover_list; /* used for recovery */
336 int res_recover_locks_count;
340 char res_name[DLM_RESNAME_MAXLEN+1];
343 /* dlm_master_lookup() flags */
345 #define DLM_LU_RECOVER_DIR 1
346 #define DLM_LU_RECOVER_MASTER 2
348 /* dlm_master_lookup() results */
350 #define DLM_LU_MATCH 1
353 /* find_rsb() flags */
355 #define R_REQUEST 0x00000001
356 #define R_RECEIVE_REQUEST 0x00000002
357 #define R_RECEIVE_RECOVER 0x00000004
362 RSB_MASTER_UNCERTAIN,
364 RSB_VALNOTVALID_PREV,
369 RSB_RECOVER_LVB_INVAL,
371 RSB_HASHED, /* set while rsb is on ls_rsbtbl */
374 static inline void rsb_set_flag(struct dlm_rsb *r, enum rsb_flags flag)
376 __set_bit(flag, &r->res_flags);
379 static inline void rsb_clear_flag(struct dlm_rsb *r, enum rsb_flags flag)
381 __clear_bit(flag, &r->res_flags);
384 static inline int rsb_flag(struct dlm_rsb *r, enum rsb_flags flag)
386 return test_bit(flag, &r->res_flags);
390 /* dlm_header is first element of all structs sent between nodes */
392 #define DLM_HEADER_MAJOR 0x00030000
393 #define DLM_HEADER_MINOR 0x00000002
395 #define DLM_VERSION_3_1 0x00030001
396 #define DLM_VERSION_3_2 0x00030002
398 #define DLM_HEADER_SLOTS 0x00000001
409 /* for DLM_MSG and DLM_RCOM */
411 /* for DLM_ACK and DLM_OPTS */
414 __le32 h_nodeid; /* nodeid of sender */
416 uint8_t h_cmd; /* DLM_MSG, DLM_RCOM */
420 #define DLM_MSG_REQUEST 1
421 #define DLM_MSG_CONVERT 2
422 #define DLM_MSG_UNLOCK 3
423 #define DLM_MSG_CANCEL 4
424 #define DLM_MSG_REQUEST_REPLY 5
425 #define DLM_MSG_CONVERT_REPLY 6
426 #define DLM_MSG_UNLOCK_REPLY 7
427 #define DLM_MSG_CANCEL_REPLY 8
428 #define DLM_MSG_GRANT 9
429 #define DLM_MSG_BAST 10
430 #define DLM_MSG_LOOKUP 11
431 #define DLM_MSG_REMOVE 12
432 #define DLM_MSG_LOOKUP_REPLY 13
433 #define DLM_MSG_PURGE 14
436 struct dlm_header m_header;
437 __le32 m_type; /* DLM_MSG_ */
440 __le32 m_lkid; /* lkid on sender */
441 __le32 m_remid; /* lkid on receiver */
442 __le32 m_parent_lkid;
443 __le32 m_parent_remid;
454 __le32 m_result; /* 0 or -EXXX */
455 char m_extra[]; /* name or lvb */
459 #define DLM_RS_NODES 0x00000001
460 #define DLM_RS_NODES_ALL 0x00000002
461 #define DLM_RS_DIR 0x00000004
462 #define DLM_RS_DIR_ALL 0x00000008
463 #define DLM_RS_LOCKS 0x00000010
464 #define DLM_RS_LOCKS_ALL 0x00000020
465 #define DLM_RS_DONE 0x00000040
466 #define DLM_RS_DONE_ALL 0x00000080
468 #define DLM_RCOM_STATUS 1
469 #define DLM_RCOM_NAMES 2
470 #define DLM_RCOM_LOOKUP 3
471 #define DLM_RCOM_LOCK 4
472 #define DLM_RCOM_STATUS_REPLY 5
473 #define DLM_RCOM_NAMES_REPLY 6
474 #define DLM_RCOM_LOOKUP_REPLY 7
475 #define DLM_RCOM_LOCK_REPLY 8
478 struct dlm_header rc_header;
479 __le32 rc_type; /* DLM_RCOM_ */
480 __le32 rc_result; /* multi-purpose */
481 __le64 rc_id; /* match reply with request */
482 __le64 rc_seq; /* sender's ls_recover_seq */
483 __le64 rc_seq_reply; /* remote ls_recover_seq */
487 struct dlm_opt_header {
491 /* need to be 8 byte aligned */
495 /* encapsulation header */
497 struct dlm_header o_header;
506 struct dlm_header header; /* common to other two */
507 struct dlm_message message;
508 struct dlm_rcom rcom;
509 struct dlm_opts opts;
512 #define DLM_RSF_NEED_SLOTS 0x00000001
514 /* RCOM_STATUS data */
521 /* RCOM_STATUS_REPLY data */
526 /* DLM_HEADER_SLOTS adds: */
530 __le32 rf_generation;
546 __le32 rl_parent_lkid;
547 __le32 rl_parent_remid;
558 char rl_name[DLM_RESNAME_MAXLEN];
563 struct list_head ls_list; /* list of lockspaces */
564 uint32_t ls_global_id; /* global unique lockspace ID */
565 uint32_t ls_generation;
568 atomic_t ls_count; /* refcount of processes in
569 the dlm using this ls */
570 wait_queue_head_t ls_count_wait;
571 int ls_create_count; /* create/release refcount */
572 unsigned long ls_flags; /* LSFL_ */
573 struct kobject ls_kobj;
575 struct xarray ls_lkbxa;
576 rwlock_t ls_lkbxa_lock;
578 /* an rsb is on rsbtl for primary locking functions,
579 and on a slow list for recovery/dump iteration */
580 struct rhashtable ls_rsbtbl;
581 rwlock_t ls_rsbtbl_lock; /* for ls_rsbtbl and ls_slow */
582 struct list_head ls_slow_inactive; /* to iterate rsbtbl */
583 struct list_head ls_slow_active; /* to iterate rsbtbl */
585 struct timer_list ls_scan_timer; /* based on first scan_list rsb toss_time */
586 struct list_head ls_scan_list; /* rsbs ordered by res_toss_time */
587 spinlock_t ls_scan_lock;
589 spinlock_t ls_waiters_lock;
590 struct list_head ls_waiters; /* lkbs needing a reply */
592 spinlock_t ls_orphans_lock;
593 struct list_head ls_orphans;
595 struct list_head ls_nodes; /* current nodes in ls */
596 struct list_head ls_nodes_gone; /* dead node list, recovery */
597 int ls_num_nodes; /* number of nodes in ls */
605 struct dlm_slot *ls_slots;
607 struct dlm_rsb ls_local_rsb; /* for returning errors */
608 struct dlm_lkb ls_local_lkb; /* for returning errors */
609 struct dlm_message ls_local_ms; /* for faking a reply */
611 struct dentry *ls_debug_rsb_dentry; /* debugfs */
612 struct dentry *ls_debug_waiters_dentry; /* debugfs */
613 struct dentry *ls_debug_locks_dentry; /* debugfs */
614 struct dentry *ls_debug_all_dentry; /* debugfs */
615 struct dentry *ls_debug_toss_dentry; /* debugfs */
616 struct dentry *ls_debug_queued_asts_dentry; /* debugfs */
618 wait_queue_head_t ls_uevent_wait; /* user part of join/leave */
619 int ls_uevent_result;
620 struct completion ls_recovery_done;
621 int ls_recovery_result;
623 struct miscdevice ls_device;
625 struct workqueue_struct *ls_callback_wq;
627 /* recovery related */
629 spinlock_t ls_cb_lock;
630 struct list_head ls_cb_delay; /* save for queue_work later */
631 struct task_struct *ls_recoverd_task;
632 struct mutex ls_recoverd_active;
633 spinlock_t ls_recover_lock;
634 unsigned long ls_recover_begin; /* jiffies timestamp */
635 uint32_t ls_recover_status; /* DLM_RS_ */
636 uint64_t ls_recover_seq;
637 struct dlm_recover *ls_recover_args;
638 struct rw_semaphore ls_in_recovery; /* block local requests */
639 rwlock_t ls_recv_active; /* block dlm_recv */
640 struct list_head ls_requestqueue;/* queue remote requests */
641 rwlock_t ls_requestqueue_lock;
642 struct dlm_rcom *ls_recover_buf;
643 int ls_recover_nodeid; /* for debugging */
644 unsigned int ls_recover_locks_in; /* for log info */
645 uint64_t ls_rcom_seq;
646 spinlock_t ls_rcom_spin;
647 struct list_head ls_recover_list;
648 spinlock_t ls_recover_list_lock;
649 int ls_recover_list_count;
650 struct xarray ls_recover_xa;
651 spinlock_t ls_recover_xa_lock;
652 wait_queue_head_t ls_wait_general;
653 wait_queue_head_t ls_recover_lock_wait;
654 spinlock_t ls_clear_proc_locks;
656 struct list_head ls_masters_list; /* root resources */
657 rwlock_t ls_masters_lock; /* protect root_list */
658 struct list_head ls_dir_dump_list; /* root resources */
659 rwlock_t ls_dir_dump_lock; /* protect root_list */
661 const struct dlm_lockspace_ops *ls_ops;
664 struct work_struct ls_free_work;
667 char ls_name[DLM_LOCKSPACE_LEN + 1];
671 * LSFL_RECOVER_STOP - dlm_ls_stop() sets this to tell dlm recovery routines
672 * that they should abort what they're doing so new recovery can be started.
674 * LSFL_RECOVER_DOWN - dlm_ls_stop() sets this to tell dlm_recoverd that it
675 * should do down_write() on the in_recovery rw_semaphore. (doing down_write
676 * within dlm_ls_stop causes complaints about the lock acquired/released
677 * in different contexts.)
679 * LSFL_RECOVER_LOCK - dlm_recoverd holds the in_recovery rw_semaphore.
680 * It sets this after it is done with down_write() on the in_recovery
681 * rw_semaphore and clears it after it has released the rw_semaphore.
683 * LSFL_RECOVER_WORK - dlm_ls_start() sets this to tell dlm_recoverd that it
684 * should begin recovery of the lockspace.
686 * LSFL_RUNNING - set when normal locking activity is enabled.
687 * dlm_ls_stop() clears this to tell dlm locking routines that they should
688 * quit what they are doing so recovery can run. dlm_recoverd sets
689 * this after recovery is finished.
692 #define LSFL_RECOVER_STOP 0
693 #define LSFL_RECOVER_DOWN 1
694 #define LSFL_RECOVER_LOCK 2
695 #define LSFL_RECOVER_WORK 3
696 #define LSFL_RUNNING 4
698 #define LSFL_RCOM_READY 5
699 #define LSFL_RCOM_WAIT 6
700 #define LSFL_UEVENT_WAIT 7
701 #define LSFL_CB_DELAY 9
702 #define LSFL_NODIR 10
703 #define LSFL_RECV_MSG_BLOCKED 11
705 #define LSFL_SOFTIRQ 13
707 #define DLM_PROC_FLAGS_CLOSING 1
708 #define DLM_PROC_FLAGS_COMPAT 2
710 /* locks list is kept so we can remove all a process's locks when it
711 exits (or orphan those that are persistent) */
713 struct dlm_user_proc {
714 dlm_lockspace_t *lockspace;
715 unsigned long flags; /* DLM_PROC_FLAGS */
716 struct list_head asts;
717 spinlock_t asts_spin;
718 struct list_head locks;
719 spinlock_t locks_spin;
720 struct list_head unlocking;
721 wait_queue_head_t wait;
724 static inline int dlm_locking_stopped(struct dlm_ls *ls)
726 return !test_bit(LSFL_RUNNING, &ls->ls_flags);
729 static inline int dlm_recovery_stopped(struct dlm_ls *ls)
731 return test_bit(LSFL_RECOVER_STOP, &ls->ls_flags);
734 static inline int dlm_no_directory(struct dlm_ls *ls)
736 return test_bit(LSFL_NODIR, &ls->ls_flags);
739 /* takes a snapshot from dlm atomic flags */
740 static inline uint32_t dlm_flags_val(const unsigned long *addr,
741 uint32_t min, uint32_t max)
743 uint32_t bit = min, val = 0;
745 for_each_set_bit_from(bit, addr, max + 1) {
752 static inline uint32_t dlm_iflags_val(const struct dlm_lkb *lkb)
754 return dlm_flags_val(&lkb->lkb_iflags, __DLM_IFL_MIN_BIT,
758 static inline uint32_t dlm_dflags_val(const struct dlm_lkb *lkb)
760 return dlm_flags_val(&lkb->lkb_dflags, __DLM_DFL_MIN_BIT,
764 /* coming from UAPI header
767 * Move this to UAPI header and let other values point to them and use BIT()
769 #define DLM_SBF_DEMOTED_BIT 0
770 #define __DLM_SBF_MIN_BIT DLM_SBF_DEMOTED_BIT
771 #define DLM_SBF_VALNOTVALID_BIT 1
772 #define DLM_SBF_ALTMODE_BIT 2
773 #define __DLM_SBF_MAX_BIT DLM_SBF_ALTMODE_BIT
775 static inline uint32_t dlm_sbflags_val(const struct dlm_lkb *lkb)
777 /* be sure the next person updates this */
778 BUILD_BUG_ON(BIT(__DLM_SBF_MAX_BIT) != DLM_SBF_ALTMODE);
780 return dlm_flags_val(&lkb->lkb_sbflags, __DLM_SBF_MIN_BIT,
784 static inline void dlm_set_flags_val(unsigned long *addr, uint32_t val,
785 uint32_t min, uint32_t max)
789 for (bit = min; bit < (max + 1); bit++) {
793 clear_bit(bit, addr);
797 static inline void dlm_set_dflags_val(struct dlm_lkb *lkb, uint32_t val)
799 dlm_set_flags_val(&lkb->lkb_dflags, val, __DLM_DFL_MIN_BIT,
803 static inline void dlm_set_sbflags_val(struct dlm_lkb *lkb, uint32_t val)
805 dlm_set_flags_val(&lkb->lkb_sbflags, val, __DLM_SBF_MIN_BIT,
809 extern struct workqueue_struct *dlm_wq;
811 int dlm_plock_init(void);
812 void dlm_plock_exit(void);
814 #ifdef CONFIG_DLM_DEBUG
815 void dlm_register_debugfs(void);
816 void dlm_unregister_debugfs(void);
817 void dlm_create_debug_file(struct dlm_ls *ls);
818 void dlm_delete_debug_file(struct dlm_ls *ls);
819 void *dlm_create_debug_comms_file(int nodeid, void *data);
820 void dlm_delete_debug_comms_file(void *ctx);
822 static inline void dlm_register_debugfs(void) { }
823 static inline void dlm_unregister_debugfs(void) { }
824 static inline void dlm_create_debug_file(struct dlm_ls *ls) { }
825 static inline void dlm_delete_debug_file(struct dlm_ls *ls) { }
826 static inline void *dlm_create_debug_comms_file(int nodeid, void *data) { return NULL; }
827 static inline void dlm_delete_debug_comms_file(void *ctx) { }
830 #endif /* __DLM_INTERNAL_DOT_H__ */