1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /******************************************************************************
3 *******************************************************************************
4 **
5 ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
6 ** Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved.
7 **
8 **
9 *******************************************************************************
10 ******************************************************************************/
11
12 #ifndef __DLM_INTERNAL_DOT_H__
13 #define __DLM_INTERNAL_DOT_H__
14
15 /*
16 * This is the main header file to be included in each DLM source file.
17 */
18
19 #include <linux/slab.h>
20 #include <linux/sched.h>
21 #include <linux/types.h>
22 #include <linux/ctype.h>
23 #include <linux/spinlock.h>
24 #include <linux/vmalloc.h>
25 #include <linux/list.h>
26 #include <linux/errno.h>
27 #include <linux/random.h>
28 #include <linux/delay.h>
29 #include <linux/socket.h>
30 #include <linux/kthread.h>
31 #include <linux/kobject.h>
32 #include <linux/kref.h>
33 #include <linux/kernel.h>
34 #include <linux/jhash.h>
35 #include <linux/miscdevice.h>
36 #include <linux/mutex.h>
37 #include <linux/idr.h>
38 #include <linux/ratelimit.h>
39 #include <linux/uaccess.h>
40
41 #include <linux/dlm.h>
42 #include "config.h"
43
44 struct dlm_ls;
45 struct dlm_lkb;
46 struct dlm_rsb;
47 struct dlm_member;
48 struct dlm_rsbtable;
49 struct dlm_recover;
50 struct dlm_header;
51 struct dlm_message;
52 struct dlm_rcom;
53 struct dlm_mhandle;
54 struct dlm_msg;
55
56 #define log_print(fmt, args...) \
57 printk(KERN_ERR "dlm: "fmt"\n" , ##args)
58 #define log_print_ratelimited(fmt, args...) \
59 printk_ratelimited(KERN_ERR "dlm: "fmt"\n", ##args)
60 #define log_error(ls, fmt, args...) \
61 printk(KERN_ERR "dlm: %s: " fmt "\n", (ls)->ls_name , ##args)
62
63 #define log_rinfo(ls, fmt, args...) \
64 do { \
65 if (dlm_config.ci_log_info) \
66 printk(KERN_INFO "dlm: %s: " fmt "\n", \
67 (ls)->ls_name, ##args); \
68 else if (dlm_config.ci_log_debug) \
69 printk(KERN_DEBUG "dlm: %s: " fmt "\n", \
70 (ls)->ls_name , ##args); \
71 } while (0)
72
73 #define log_debug(ls, fmt, args...) \
74 do { \
75 if (dlm_config.ci_log_debug) \
76 printk(KERN_DEBUG "dlm: %s: " fmt "\n", \
77 (ls)->ls_name , ##args); \
78 } while (0)
79
80 #define log_limit(ls, fmt, args...) \
81 do { \
82 if (dlm_config.ci_log_debug) \
83 printk_ratelimited(KERN_DEBUG "dlm: %s: " fmt "\n", \
84 (ls)->ls_name , ##args); \
85 } while (0)
86
87 #define DLM_ASSERT(x, do) \
88 { \
89 if (!(x)) \
90 { \
91 printk(KERN_ERR "\nDLM: Assertion failed on line %d of file %s\n" \
92 "DLM: assertion: \"%s\"\n" \
93 "DLM: time = %lu\n", \
94 __LINE__, __FILE__, #x, jiffies); \
95 {do} \
96 printk("\n"); \
97 panic("DLM: Record message above and reboot.\n"); \
98 } \
99 }
100
101
102 #define DLM_RTF_SHRINK 0x00000001
103
104 struct dlm_rsbtable {
105 struct rb_root keep;
106 struct rb_root toss;
107 spinlock_t lock;
108 uint32_t flags;
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 #ifdef CONFIG_DLM_DEPRECATED_API
149 unsigned long timeout;
150 #endif
151 };
152
153
154 /*
155 * Lock block
156 *
157 * A lock can be one of three types:
158 *
159 * local copy lock is mastered locally
160 * (lkb_nodeid is zero and DLM_LKF_MSTCPY is not set)
161 * process copy lock is mastered on a remote node
162 * (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is not set)
163 * master copy master node's copy of a lock owned by remote node
164 * (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is set)
165 *
166 * lkb_exflags: a copy of the most recent flags arg provided to dlm_lock or
167 * dlm_unlock. The dlm does not modify these or use any private flags in
168 * this field; it only contains DLM_LKF_ flags from dlm.h. These flags
169 * are sent as-is to the remote master when the lock is remote.
170 *
171 * lkb_flags: internal dlm flags (DLM_IFL_ prefix) from dlm_internal.h.
172 * Some internal flags are shared between the master and process nodes;
173 * these shared flags are kept in the lower two bytes. One of these
174 * flags set on the master copy will be propagated to the process copy
175 * and v.v. Other internal flags are private to the master or process
176 * node (e.g. DLM_IFL_MSTCPY). These are kept in the high two bytes.
177 *
178 * lkb_sbflags: status block flags. These flags are copied directly into
179 * the caller's lksb.sb_flags prior to the dlm_lock/dlm_unlock completion
180 * ast. All defined in dlm.h with DLM_SBF_ prefix.
181 *
182 * lkb_status: the lock status indicates which rsb queue the lock is
183 * on, grant, convert, or wait. DLM_LKSTS_ WAITING/GRANTED/CONVERT
184 *
185 * lkb_wait_type: the dlm message type (DLM_MSG_ prefix) for which a
186 * reply is needed. Only set when the lkb is on the lockspace waiters
187 * list awaiting a reply from a remote node.
188 *
189 * lkb_nodeid: when the lkb is a local copy, nodeid is 0; when the lkb
190 * is a master copy, nodeid specifies the remote lock holder, when the
191 * lkb is a process copy, the nodeid specifies the lock master.
192 */
193
194 /* lkb_status */
195
196 #define DLM_LKSTS_WAITING 1
197 #define DLM_LKSTS_GRANTED 2
198 #define DLM_LKSTS_CONVERT 3
199
200 /* lkb_flags */
201
202 #define DLM_IFL_MSTCPY 0x00010000
203 #define DLM_IFL_RESEND 0x00020000
204 #define DLM_IFL_DEAD 0x00040000
205 #define DLM_IFL_OVERLAP_UNLOCK 0x00080000
206 #define DLM_IFL_OVERLAP_CANCEL 0x00100000
207 #define DLM_IFL_ENDOFLIFE 0x00200000
208 #ifdef CONFIG_DLM_DEPRECATED_API
209 #define DLM_IFL_WATCH_TIMEWARN 0x00400000
210 #define DLM_IFL_TIMEOUT_CANCEL 0x00800000
211 #endif
212 #define DLM_IFL_DEADLOCK_CANCEL 0x01000000
213 #define DLM_IFL_STUB_MS 0x02000000 /* magic number for m_flags */
214 #define DLM_IFL_CB_PENDING 0x04000000
215 /* least significant 2 bytes are message changed, they are full transmitted
216 * but at receive side only the 2 bytes LSB will be set.
217 *
218 * Even wireshark dlm dissector does only evaluate the lower bytes and note
219 * that they may not be used on transceiver side, we assume the higher bytes
220 * are for internal use or reserved so long they are not parsed on receiver
221 * side.
222 */
223 #define DLM_IFL_USER 0x00000001
224 #define DLM_IFL_ORPHAN 0x00000002
225
226 #define DLM_CB_CAST 0x00000001
227 #define DLM_CB_BAST 0x00000002
228
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 */
234
235 struct list_head list;
236 struct kref ref;
237 };
238
239 struct dlm_lkb {
240 struct dlm_rsb *lkb_resource; /* the rsb */
241 struct kref lkb_ref;
242 int lkb_nodeid; /* copied from rsb */
243 int lkb_ownpid; /* pid of lock owner */
244 uint32_t lkb_id; /* our lock ID */
245 uint32_t lkb_remid; /* lock ID on remote partner */
246 uint32_t lkb_exflags; /* external flags from caller */
247 uint32_t lkb_sbflags; /* lksb flags */
248 uint32_t lkb_flags; /* internal flags */
249 uint32_t lkb_lvbseq; /* lvb sequence number */
250
251 int8_t lkb_status; /* granted, waiting, convert */
252 int8_t lkb_rqmode; /* requested lock mode */
253 int8_t lkb_grmode; /* granted lock mode */
254 int8_t lkb_highbast; /* highest mode bast sent for */
255
256 int8_t lkb_wait_type; /* type of reply waiting for */
257 int8_t lkb_wait_count;
258 int lkb_wait_nodeid; /* for debugging */
259
260 struct list_head lkb_statequeue; /* rsb g/c/w list */
261 struct list_head lkb_rsb_lookup; /* waiting for rsb lookup */
262 struct list_head lkb_wait_reply; /* waiting for remote reply */
263 struct list_head lkb_ownqueue; /* list of locks for a process */
264 ktime_t lkb_timestamp;
265
266 #ifdef CONFIG_DLM_DEPRECATED_API
267 struct list_head lkb_time_list;
268 unsigned long lkb_timeout_cs;
269 #endif
270
271 spinlock_t lkb_cb_lock;
272 struct work_struct lkb_cb_work;
273 struct list_head lkb_cb_list; /* for ls_cb_delay or proc->asts */
274 struct list_head lkb_callbacks;
275 struct dlm_callback *lkb_last_cast;
276 struct dlm_callback *lkb_last_cb;
277 int lkb_last_bast_mode;
278 ktime_t lkb_last_cast_time; /* for debugging */
279 ktime_t lkb_last_bast_time; /* for debugging */
280
281 uint64_t lkb_recover_seq; /* from ls_recover_seq */
282
283 char *lkb_lvbptr;
284 struct dlm_lksb *lkb_lksb; /* caller's status block */
285 void (*lkb_astfn) (void *astparam);
286 void (*lkb_bastfn) (void *astparam, int mode);
287 union {
288 void *lkb_astparam; /* caller's ast arg */
289 struct dlm_user_args *lkb_ua;
290 };
291 };
292
293 /*
294 * res_master_nodeid is "normal": 0 is unset/invalid, non-zero is the real
295 * nodeid, even when nodeid is our_nodeid.
296 *
297 * res_nodeid is "odd": -1 is unset/invalid, zero means our_nodeid,
298 * greater than zero when another nodeid.
299 *
300 * (TODO: remove res_nodeid and only use res_master_nodeid)
301 */
302
303 struct dlm_rsb {
304 struct dlm_ls *res_ls; /* the lockspace */
305 struct kref res_ref;
306 struct mutex res_mutex;
307 unsigned long res_flags;
308 int res_length; /* length of rsb name */
309 int res_nodeid;
310 int res_master_nodeid;
311 int res_dir_nodeid;
312 int res_id; /* for ls_recover_idr */
313 uint32_t res_lvbseq;
314 uint32_t res_hash;
315 uint32_t res_bucket; /* rsbtbl */
316 unsigned long res_toss_time;
317 uint32_t res_first_lkid;
318 struct list_head res_lookup; /* lkbs waiting on first */
319 union {
320 struct list_head res_hashchain;
321 struct rb_node res_hashnode; /* rsbtbl */
322 };
323 struct list_head res_grantqueue;
324 struct list_head res_convertqueue;
325 struct list_head res_waitqueue;
326
327 struct list_head res_root_list; /* used for recovery */
328 struct list_head res_recover_list; /* used for recovery */
329 int res_recover_locks_count;
330
331 char *res_lvbptr;
332 char res_name[DLM_RESNAME_MAXLEN+1];
333 };
334
335 /* dlm_master_lookup() flags */
336
337 #define DLM_LU_RECOVER_DIR 1
338 #define DLM_LU_RECOVER_MASTER 2
339
340 /* dlm_master_lookup() results */
341
342 #define DLM_LU_MATCH 1
343 #define DLM_LU_ADD 2
344
345 /* find_rsb() flags */
346
347 #define R_REQUEST 0x00000001
348 #define R_RECEIVE_REQUEST 0x00000002
349 #define R_RECEIVE_RECOVER 0x00000004
350
351 /* rsb_flags */
352
353 enum rsb_flags {
354 RSB_MASTER_UNCERTAIN,
355 RSB_VALNOTVALID,
356 RSB_VALNOTVALID_PREV,
357 RSB_NEW_MASTER,
358 RSB_NEW_MASTER2,
359 RSB_RECOVER_CONVERT,
360 RSB_RECOVER_GRANT,
361 RSB_RECOVER_LVB_INVAL,
362 };
363
rsb_set_flag(struct dlm_rsb * r,enum rsb_flags flag)364 static inline void rsb_set_flag(struct dlm_rsb *r, enum rsb_flags flag)
365 {
366 __set_bit(flag, &r->res_flags);
367 }
368
rsb_clear_flag(struct dlm_rsb * r,enum rsb_flags flag)369 static inline void rsb_clear_flag(struct dlm_rsb *r, enum rsb_flags flag)
370 {
371 __clear_bit(flag, &r->res_flags);
372 }
373
rsb_flag(struct dlm_rsb * r,enum rsb_flags flag)374 static inline int rsb_flag(struct dlm_rsb *r, enum rsb_flags flag)
375 {
376 return test_bit(flag, &r->res_flags);
377 }
378
379
380 /* dlm_header is first element of all structs sent between nodes */
381
382 #define DLM_HEADER_MAJOR 0x00030000
383 #define DLM_HEADER_MINOR 0x00000002
384
385 #define DLM_VERSION_3_1 0x00030001
386 #define DLM_VERSION_3_2 0x00030002
387
388 #define DLM_HEADER_SLOTS 0x00000001
389
390 #define DLM_MSG 1
391 #define DLM_RCOM 2
392 #define DLM_OPTS 3
393 #define DLM_ACK 4
394 #define DLM_FIN 5
395
396 struct dlm_header {
397 __le32 h_version;
398 union {
399 /* for DLM_MSG and DLM_RCOM */
400 __le32 h_lockspace;
401 /* for DLM_ACK and DLM_OPTS */
402 __le32 h_seq;
403 } u;
404 __le32 h_nodeid; /* nodeid of sender */
405 __le16 h_length;
406 uint8_t h_cmd; /* DLM_MSG, DLM_RCOM */
407 uint8_t h_pad;
408 };
409
410 #define DLM_MSG_REQUEST 1
411 #define DLM_MSG_CONVERT 2
412 #define DLM_MSG_UNLOCK 3
413 #define DLM_MSG_CANCEL 4
414 #define DLM_MSG_REQUEST_REPLY 5
415 #define DLM_MSG_CONVERT_REPLY 6
416 #define DLM_MSG_UNLOCK_REPLY 7
417 #define DLM_MSG_CANCEL_REPLY 8
418 #define DLM_MSG_GRANT 9
419 #define DLM_MSG_BAST 10
420 #define DLM_MSG_LOOKUP 11
421 #define DLM_MSG_REMOVE 12
422 #define DLM_MSG_LOOKUP_REPLY 13
423 #define DLM_MSG_PURGE 14
424
425 struct dlm_message {
426 struct dlm_header m_header;
427 __le32 m_type; /* DLM_MSG_ */
428 __le32 m_nodeid;
429 __le32 m_pid;
430 __le32 m_lkid; /* lkid on sender */
431 __le32 m_remid; /* lkid on receiver */
432 __le32 m_parent_lkid;
433 __le32 m_parent_remid;
434 __le32 m_exflags;
435 __le32 m_sbflags;
436 __le32 m_flags;
437 __le32 m_lvbseq;
438 __le32 m_hash;
439 __le32 m_status;
440 __le32 m_grmode;
441 __le32 m_rqmode;
442 __le32 m_bastmode;
443 __le32 m_asts;
444 __le32 m_result; /* 0 or -EXXX */
445 char m_extra[]; /* name or lvb */
446 };
447
448
449 #define DLM_RS_NODES 0x00000001
450 #define DLM_RS_NODES_ALL 0x00000002
451 #define DLM_RS_DIR 0x00000004
452 #define DLM_RS_DIR_ALL 0x00000008
453 #define DLM_RS_LOCKS 0x00000010
454 #define DLM_RS_LOCKS_ALL 0x00000020
455 #define DLM_RS_DONE 0x00000040
456 #define DLM_RS_DONE_ALL 0x00000080
457
458 #define DLM_RCOM_STATUS 1
459 #define DLM_RCOM_NAMES 2
460 #define DLM_RCOM_LOOKUP 3
461 #define DLM_RCOM_LOCK 4
462 #define DLM_RCOM_STATUS_REPLY 5
463 #define DLM_RCOM_NAMES_REPLY 6
464 #define DLM_RCOM_LOOKUP_REPLY 7
465 #define DLM_RCOM_LOCK_REPLY 8
466
467 struct dlm_rcom {
468 struct dlm_header rc_header;
469 __le32 rc_type; /* DLM_RCOM_ */
470 __le32 rc_result; /* multi-purpose */
471 __le64 rc_id; /* match reply with request */
472 __le64 rc_seq; /* sender's ls_recover_seq */
473 __le64 rc_seq_reply; /* remote ls_recover_seq */
474 char rc_buf[];
475 };
476
477 struct dlm_opt_header {
478 __le16 t_type;
479 __le16 t_length;
480 __le32 t_pad;
481 /* need to be 8 byte aligned */
482 char t_value[];
483 };
484
485 /* encapsulation header */
486 struct dlm_opts {
487 struct dlm_header o_header;
488 uint8_t o_nextcmd;
489 uint8_t o_pad;
490 __le16 o_optlen;
491 __le32 o_pad2;
492 char o_opts[];
493 };
494
495 union dlm_packet {
496 struct dlm_header header; /* common to other two */
497 struct dlm_message message;
498 struct dlm_rcom rcom;
499 struct dlm_opts opts;
500 };
501
502 #define DLM_RSF_NEED_SLOTS 0x00000001
503
504 /* RCOM_STATUS data */
505 struct rcom_status {
506 __le32 rs_flags;
507 __le32 rs_unused1;
508 __le64 rs_unused2;
509 };
510
511 /* RCOM_STATUS_REPLY data */
512 struct rcom_config {
513 __le32 rf_lvblen;
514 __le32 rf_lsflags;
515
516 /* DLM_HEADER_SLOTS adds: */
517 __le32 rf_flags;
518 __le16 rf_our_slot;
519 __le16 rf_num_slots;
520 __le32 rf_generation;
521 __le32 rf_unused1;
522 __le64 rf_unused2;
523 };
524
525 struct rcom_slot {
526 __le32 ro_nodeid;
527 __le16 ro_slot;
528 __le16 ro_unused1;
529 __le64 ro_unused2;
530 };
531
532 struct rcom_lock {
533 __le32 rl_ownpid;
534 __le32 rl_lkid;
535 __le32 rl_remid;
536 __le32 rl_parent_lkid;
537 __le32 rl_parent_remid;
538 __le32 rl_exflags;
539 __le32 rl_flags;
540 __le32 rl_lvbseq;
541 __le32 rl_result;
542 int8_t rl_rqmode;
543 int8_t rl_grmode;
544 int8_t rl_status;
545 int8_t rl_asts;
546 __le16 rl_wait_type;
547 __le16 rl_namelen;
548 char rl_name[DLM_RESNAME_MAXLEN];
549 char rl_lvb[];
550 };
551
552 /*
553 * The max number of resources per rsbtbl bucket that shrink will attempt
554 * to remove in each iteration.
555 */
556
557 #define DLM_REMOVE_NAMES_MAX 8
558
559 struct dlm_ls {
560 struct list_head ls_list; /* list of lockspaces */
561 dlm_lockspace_t *ls_local_handle;
562 uint32_t ls_global_id; /* global unique lockspace ID */
563 uint32_t ls_generation;
564 uint32_t ls_exflags;
565 int ls_lvblen;
566 atomic_t ls_count; /* refcount of processes in
567 the dlm using this ls */
568 wait_queue_head_t ls_count_wait;
569 int ls_create_count; /* create/release refcount */
570 unsigned long ls_flags; /* LSFL_ */
571 unsigned long ls_scan_time;
572 struct kobject ls_kobj;
573
574 struct idr ls_lkbidr;
575 spinlock_t ls_lkbidr_spin;
576
577 struct dlm_rsbtable *ls_rsbtbl;
578 uint32_t ls_rsbtbl_size;
579
580 struct mutex ls_waiters_mutex;
581 struct list_head ls_waiters; /* lkbs needing a reply */
582
583 struct mutex ls_orphans_mutex;
584 struct list_head ls_orphans;
585
586 #ifdef CONFIG_DLM_DEPRECATED_API
587 struct mutex ls_timeout_mutex;
588 struct list_head ls_timeout;
589 #endif
590
591 spinlock_t ls_new_rsb_spin;
592 int ls_new_rsb_count;
593 struct list_head ls_new_rsb; /* new rsb structs */
594
595 char *ls_remove_names[DLM_REMOVE_NAMES_MAX];
596 int ls_remove_lens[DLM_REMOVE_NAMES_MAX];
597
598 struct list_head ls_nodes; /* current nodes in ls */
599 struct list_head ls_nodes_gone; /* dead node list, recovery */
600 int ls_num_nodes; /* number of nodes in ls */
601 int ls_low_nodeid;
602 int ls_total_weight;
603 int *ls_node_array;
604
605 int ls_slot;
606 int ls_num_slots;
607 int ls_slots_size;
608 struct dlm_slot *ls_slots;
609
610 struct dlm_rsb ls_stub_rsb; /* for returning errors */
611 struct dlm_lkb ls_stub_lkb; /* for returning errors */
612 struct dlm_message ls_stub_ms; /* for faking a reply */
613
614 struct dentry *ls_debug_rsb_dentry; /* debugfs */
615 struct dentry *ls_debug_waiters_dentry; /* debugfs */
616 struct dentry *ls_debug_locks_dentry; /* debugfs */
617 struct dentry *ls_debug_all_dentry; /* debugfs */
618 struct dentry *ls_debug_toss_dentry; /* debugfs */
619
620 wait_queue_head_t ls_uevent_wait; /* user part of join/leave */
621 int ls_uevent_result;
622 struct completion ls_recovery_done;
623 int ls_recovery_result;
624
625 struct miscdevice ls_device;
626
627 struct workqueue_struct *ls_callback_wq;
628
629 /* recovery related */
630
631 spinlock_t ls_cb_lock;
632 struct list_head ls_cb_delay; /* save for queue_work later */
633 struct timer_list ls_timer;
634 struct task_struct *ls_recoverd_task;
635 struct mutex ls_recoverd_active;
636 spinlock_t ls_recover_lock;
637 unsigned long ls_recover_begin; /* jiffies timestamp */
638 uint32_t ls_recover_status; /* DLM_RS_ */
639 uint64_t ls_recover_seq;
640 struct dlm_recover *ls_recover_args;
641 struct rw_semaphore ls_in_recovery; /* block local requests */
642 struct rw_semaphore ls_recv_active; /* block dlm_recv */
643 struct list_head ls_requestqueue;/* queue remote requests */
644 atomic_t ls_requestqueue_cnt;
645 wait_queue_head_t ls_requestqueue_wait;
646 struct mutex ls_requestqueue_mutex;
647 struct dlm_rcom *ls_recover_buf;
648 int ls_recover_nodeid; /* for debugging */
649 unsigned int ls_recover_dir_sent_res; /* for log info */
650 unsigned int ls_recover_dir_sent_msg; /* for log info */
651 unsigned int ls_recover_locks_in; /* for log info */
652 uint64_t ls_rcom_seq;
653 spinlock_t ls_rcom_spin;
654 struct list_head ls_recover_list;
655 spinlock_t ls_recover_list_lock;
656 int ls_recover_list_count;
657 struct idr ls_recover_idr;
658 spinlock_t ls_recover_idr_lock;
659 wait_queue_head_t ls_wait_general;
660 wait_queue_head_t ls_recover_lock_wait;
661 spinlock_t ls_clear_proc_locks;
662
663 struct list_head ls_root_list; /* root resources */
664 struct rw_semaphore ls_root_sem; /* protect root_list */
665
666 const struct dlm_lockspace_ops *ls_ops;
667 void *ls_ops_arg;
668
669 int ls_namelen;
670 char ls_name[DLM_LOCKSPACE_LEN + 1];
671 };
672
673 /*
674 * LSFL_RECOVER_STOP - dlm_ls_stop() sets this to tell dlm recovery routines
675 * that they should abort what they're doing so new recovery can be started.
676 *
677 * LSFL_RECOVER_DOWN - dlm_ls_stop() sets this to tell dlm_recoverd that it
678 * should do down_write() on the in_recovery rw_semaphore. (doing down_write
679 * within dlm_ls_stop causes complaints about the lock acquired/released
680 * in different contexts.)
681 *
682 * LSFL_RECOVER_LOCK - dlm_recoverd holds the in_recovery rw_semaphore.
683 * It sets this after it is done with down_write() on the in_recovery
684 * rw_semaphore and clears it after it has released the rw_semaphore.
685 *
686 * LSFL_RECOVER_WORK - dlm_ls_start() sets this to tell dlm_recoverd that it
687 * should begin recovery of the lockspace.
688 *
689 * LSFL_RUNNING - set when normal locking activity is enabled.
690 * dlm_ls_stop() clears this to tell dlm locking routines that they should
691 * quit what they are doing so recovery can run. dlm_recoverd sets
692 * this after recovery is finished.
693 */
694
695 #define LSFL_RECOVER_STOP 0
696 #define LSFL_RECOVER_DOWN 1
697 #define LSFL_RECOVER_LOCK 2
698 #define LSFL_RECOVER_WORK 3
699 #define LSFL_RUNNING 4
700
701 #define LSFL_RCOM_READY 5
702 #define LSFL_RCOM_WAIT 6
703 #define LSFL_UEVENT_WAIT 7
704 #ifdef CONFIG_DLM_DEPRECATED_API
705 #define LSFL_TIMEWARN 8
706 #endif
707 #define LSFL_CB_DELAY 9
708 #define LSFL_NODIR 10
709
710 /* much of this is just saving user space pointers associated with the
711 lock that we pass back to the user lib with an ast */
712
713 struct dlm_user_args {
714 struct dlm_user_proc *proc; /* each process that opens the lockspace
715 device has private data
716 (dlm_user_proc) on the struct file,
717 the process's locks point back to it*/
718 struct dlm_lksb lksb;
719 struct dlm_lksb __user *user_lksb;
720 void __user *castparam;
721 void __user *castaddr;
722 void __user *bastparam;
723 void __user *bastaddr;
724 uint64_t xid;
725 };
726
727 #define DLM_PROC_FLAGS_CLOSING 1
728 #define DLM_PROC_FLAGS_COMPAT 2
729
730 /* locks list is kept so we can remove all a process's locks when it
731 exits (or orphan those that are persistent) */
732
733 struct dlm_user_proc {
734 dlm_lockspace_t *lockspace;
735 unsigned long flags; /* DLM_PROC_FLAGS */
736 struct list_head asts;
737 spinlock_t asts_spin;
738 struct list_head locks;
739 spinlock_t locks_spin;
740 struct list_head unlocking;
741 wait_queue_head_t wait;
742 };
743
dlm_locking_stopped(struct dlm_ls * ls)744 static inline int dlm_locking_stopped(struct dlm_ls *ls)
745 {
746 return !test_bit(LSFL_RUNNING, &ls->ls_flags);
747 }
748
dlm_recovery_stopped(struct dlm_ls * ls)749 static inline int dlm_recovery_stopped(struct dlm_ls *ls)
750 {
751 return test_bit(LSFL_RECOVER_STOP, &ls->ls_flags);
752 }
753
dlm_no_directory(struct dlm_ls * ls)754 static inline int dlm_no_directory(struct dlm_ls *ls)
755 {
756 return test_bit(LSFL_NODIR, &ls->ls_flags);
757 }
758
759 #ifdef CONFIG_DLM_DEPRECATED_API
760 int dlm_netlink_init(void);
761 void dlm_netlink_exit(void);
762 void dlm_timeout_warn(struct dlm_lkb *lkb);
763 #else
dlm_netlink_init(void)764 static inline int dlm_netlink_init(void) { return 0; }
dlm_netlink_exit(void)765 static inline void dlm_netlink_exit(void) { };
dlm_timeout_warn(struct dlm_lkb * lkb)766 static inline void dlm_timeout_warn(struct dlm_lkb *lkb) { };
767 #endif
768 int dlm_plock_init(void);
769 void dlm_plock_exit(void);
770
771 #ifdef CONFIG_DLM_DEBUG
772 void dlm_register_debugfs(void);
773 void dlm_unregister_debugfs(void);
774 void dlm_create_debug_file(struct dlm_ls *ls);
775 void dlm_delete_debug_file(struct dlm_ls *ls);
776 void *dlm_create_debug_comms_file(int nodeid, void *data);
777 void dlm_delete_debug_comms_file(void *ctx);
778 #else
dlm_register_debugfs(void)779 static inline void dlm_register_debugfs(void) { }
dlm_unregister_debugfs(void)780 static inline void dlm_unregister_debugfs(void) { }
dlm_create_debug_file(struct dlm_ls * ls)781 static inline void dlm_create_debug_file(struct dlm_ls *ls) { }
dlm_delete_debug_file(struct dlm_ls * ls)782 static inline void dlm_delete_debug_file(struct dlm_ls *ls) { }
dlm_create_debug_comms_file(int nodeid,void * data)783 static inline void *dlm_create_debug_comms_file(int nodeid, void *data) { return NULL; }
dlm_delete_debug_comms_file(void * ctx)784 static inline void dlm_delete_debug_comms_file(void *ctx) { }
785 #endif
786
787 #endif /* __DLM_INTERNAL_DOT_H__ */
788
789