blob: 5a7ac33b629cf5db96d6546ee2b394809c4278d3 [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/uaccess.h>
41
42#include <linux/dlm.h>
David Teigland99fc6482007-01-09 09:44:01 -060043#include "config.h"
David Teiglande7fd4172006-01-18 09:30:29 +000044
David Teiglande7fd4172006-01-18 09:30:29 +000045/* 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
51struct dlm_ls;
52struct dlm_lkb;
53struct dlm_rsb;
54struct dlm_member;
55struct dlm_lkbtable;
56struct dlm_rsbtable;
57struct dlm_dirtable;
58struct dlm_direntry;
59struct dlm_recover;
60struct dlm_header;
61struct dlm_message;
62struct dlm_rcom;
63struct 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
David Teigland99fc6482007-01-09 09:44:01 -060070#define log_debug(ls, fmt, args...) \
71do { \
72 if (dlm_config.ci_log_debug) \
73 printk(KERN_DEBUG "dlm: %s: " fmt "\n", \
74 (ls)->ls_name , ##args); \
75} while (0)
David Teiglande7fd4172006-01-18 09:30:29 +000076
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
93struct dlm_direntry {
94 struct list_head list;
95 uint32_t master_nodeid;
96 uint16_t length;
97 char name[1];
98};
99
100struct dlm_dirtable {
101 struct list_head list;
102 rwlock_t lock;
103};
104
105struct dlm_rsbtable {
106 struct list_head list;
107 struct list_head toss;
108 rwlock_t lock;
109};
110
111struct 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
121struct 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
131struct dlm_recover {
132 struct list_head list;
David Teiglandd44e0fc2008-03-18 14:22:11 -0500133 int *nodeids; /* nodeids of all members */
David Teiglande7fd4172006-01-18 09:30:29 +0000134 int node_count;
David Teiglandd44e0fc2008-03-18 14:22:11 -0500135 int *new; /* nodeids of new members */
136 int new_count;
David Teiglande7fd4172006-01-18 09:30:29 +0000137 uint64_t seq;
138};
139
140/*
141 * Pass input args to second stage locking function.
142 */
143
144struct dlm_args {
145 uint32_t flags;
David Teiglande5dae542008-02-06 00:35:45 -0600146 void (*astfn) (void *astparam);
147 void *astparam;
148 void (*bastfn) (void *astparam, int mode);
David Teiglande7fd4172006-01-18 09:30:29 +0000149 int mode;
150 struct dlm_lksb *lksb;
David Teiglandd7db9232007-05-18 09:00:32 -0500151 unsigned long timeout;
David Teiglande7fd4172006-01-18 09:30:29 +0000152};
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_ast_type */
196
197#define AST_COMP 1
198#define AST_BAST 2
199
David Teiglande7fd4172006-01-18 09:30:29 +0000200/* lkb_status */
201
202#define DLM_LKSTS_WAITING 1
203#define DLM_LKSTS_GRANTED 2
204#define DLM_LKSTS_CONVERT 3
205
206/* lkb_flags */
207
208#define DLM_IFL_MSTCPY 0x00010000
209#define DLM_IFL_RESEND 0x00020000
David Teigland597d0ca2006-07-12 16:44:04 -0500210#define DLM_IFL_DEAD 0x00040000
David Teiglandef0c2bb2007-03-28 09:56:46 -0500211#define DLM_IFL_OVERLAP_UNLOCK 0x00080000
212#define DLM_IFL_OVERLAP_CANCEL 0x00100000
213#define DLM_IFL_ENDOFLIFE 0x00200000
David Teigland3ae1acf2007-05-18 08:59:31 -0500214#define DLM_IFL_WATCH_TIMEWARN 0x00400000
David Teigland84d8cd62007-05-29 08:44:23 -0500215#define DLM_IFL_TIMEOUT_CANCEL 0x00800000
David Teigland8b4021f2007-05-29 08:46:00 -0500216#define DLM_IFL_DEADLOCK_CANCEL 0x01000000
David Teigland597d0ca2006-07-12 16:44:04 -0500217#define DLM_IFL_USER 0x00000001
218#define DLM_IFL_ORPHAN 0x00000002
David Teiglande7fd4172006-01-18 09:30:29 +0000219
220struct dlm_lkb {
221 struct dlm_rsb *lkb_resource; /* the rsb */
222 struct kref lkb_ref;
223 int lkb_nodeid; /* copied from rsb */
224 int lkb_ownpid; /* pid of lock owner */
225 uint32_t lkb_id; /* our lock ID */
226 uint32_t lkb_remid; /* lock ID on remote partner */
227 uint32_t lkb_exflags; /* external flags from caller */
228 uint32_t lkb_sbflags; /* lksb flags */
229 uint32_t lkb_flags; /* internal flags */
230 uint32_t lkb_lvbseq; /* lvb sequence number */
231
232 int8_t lkb_status; /* granted, waiting, convert */
233 int8_t lkb_rqmode; /* requested lock mode */
234 int8_t lkb_grmode; /* granted lock mode */
235 int8_t lkb_bastmode; /* requested mode */
236 int8_t lkb_highbast; /* highest mode bast sent for */
David Teiglande7fd4172006-01-18 09:30:29 +0000237 int8_t lkb_wait_type; /* type of reply waiting for */
David Teiglandef0c2bb2007-03-28 09:56:46 -0500238 int8_t lkb_wait_count;
David Teiglande7fd4172006-01-18 09:30:29 +0000239 int8_t lkb_ast_type; /* type of ast queued for */
240
241 struct list_head lkb_idtbl_list; /* lockspace lkbtbl */
242 struct list_head lkb_statequeue; /* rsb g/c/w list */
243 struct list_head lkb_rsb_lookup; /* waiting for rsb lookup */
244 struct list_head lkb_wait_reply; /* waiting for remote reply */
245 struct list_head lkb_astqueue; /* need ast to be sent */
David Teigland597d0ca2006-07-12 16:44:04 -0500246 struct list_head lkb_ownqueue; /* list of locks for a process */
David Teigland3ae1acf2007-05-18 08:59:31 -0500247 struct list_head lkb_time_list;
248 unsigned long lkb_timestamp;
249 unsigned long lkb_timeout_cs;
David Teiglande7fd4172006-01-18 09:30:29 +0000250
David Teiglande7fd4172006-01-18 09:30:29 +0000251 char *lkb_lvbptr;
252 struct dlm_lksb *lkb_lksb; /* caller's status block */
David Teiglande5dae542008-02-06 00:35:45 -0600253 void (*lkb_astfn) (void *astparam);
254 void (*lkb_bastfn) (void *astparam, int mode);
David Teiglandd292c0c2008-02-06 23:27:04 -0600255 union {
256 void *lkb_astparam; /* caller's ast arg */
257 struct dlm_user_args *lkb_ua;
258 };
David Teiglande7fd4172006-01-18 09:30:29 +0000259};
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
Al Viroeef7d732008-01-25 00:58:46 -0500406union dlm_packet {
407 struct dlm_header header; /* common to other two */
408 struct dlm_message message;
409 struct dlm_rcom rcom;
410};
411
David Teiglande7fd4172006-01-18 09:30:29 +0000412struct rcom_config {
Al Viro93ff2972008-01-25 02:34:00 -0500413 __le32 rf_lvblen;
414 __le32 rf_lsflags;
415 __le64 rf_unused;
David Teiglande7fd4172006-01-18 09:30:29 +0000416};
417
418struct rcom_lock {
Al Viro163a1852008-01-25 02:08:26 -0500419 __le32 rl_ownpid;
420 __le32 rl_lkid;
421 __le32 rl_remid;
422 __le32 rl_parent_lkid;
423 __le32 rl_parent_remid;
424 __le32 rl_exflags;
425 __le32 rl_flags;
426 __le32 rl_lvbseq;
427 __le32 rl_result;
David Teiglande7fd4172006-01-18 09:30:29 +0000428 int8_t rl_rqmode;
429 int8_t rl_grmode;
430 int8_t rl_status;
431 int8_t rl_asts;
Al Viro163a1852008-01-25 02:08:26 -0500432 __le16 rl_wait_type;
433 __le16 rl_namelen;
David Teiglande7fd4172006-01-18 09:30:29 +0000434 char rl_name[DLM_RESNAME_MAXLEN];
435 char rl_lvb[0];
436};
437
438struct dlm_ls {
439 struct list_head ls_list; /* list of lockspaces */
David Teigland597d0ca2006-07-12 16:44:04 -0500440 dlm_lockspace_t *ls_local_handle;
David Teiglande7fd4172006-01-18 09:30:29 +0000441 uint32_t ls_global_id; /* global unique lockspace ID */
442 uint32_t ls_exflags;
443 int ls_lvblen;
444 int ls_count; /* reference count */
445 unsigned long ls_flags; /* LSFL_ */
446 struct kobject ls_kobj;
447
448 struct dlm_rsbtable *ls_rsbtbl;
449 uint32_t ls_rsbtbl_size;
450
451 struct dlm_lkbtable *ls_lkbtbl;
452 uint32_t ls_lkbtbl_size;
453
454 struct dlm_dirtable *ls_dirtbl;
455 uint32_t ls_dirtbl_size;
456
David Teigland90135922006-01-20 08:47:07 +0000457 struct mutex ls_waiters_mutex;
David Teiglande7fd4172006-01-18 09:30:29 +0000458 struct list_head ls_waiters; /* lkbs needing a reply */
459
David Teiglandef0c2bb2007-03-28 09:56:46 -0500460 struct mutex ls_orphans_mutex;
461 struct list_head ls_orphans;
462
David Teigland3ae1acf2007-05-18 08:59:31 -0500463 struct mutex ls_timeout_mutex;
464 struct list_head ls_timeout;
465
David Teiglande7fd4172006-01-18 09:30:29 +0000466 struct list_head ls_nodes; /* current nodes in ls */
467 struct list_head ls_nodes_gone; /* dead node list, recovery */
468 int ls_num_nodes; /* number of nodes in ls */
469 int ls_low_nodeid;
470 int ls_total_weight;
471 int *ls_node_array;
Patrick Caulfield44f487a2007-06-06 09:21:22 -0500472 gfp_t ls_allocation;
David Teiglande7fd4172006-01-18 09:30:29 +0000473
474 struct dlm_rsb ls_stub_rsb; /* for returning errors */
475 struct dlm_lkb ls_stub_lkb; /* for returning errors */
476 struct dlm_message ls_stub_ms; /* for faking a reply */
477
David Teigland5de63192006-07-25 13:44:31 -0500478 struct dentry *ls_debug_rsb_dentry; /* debugfs */
479 struct dentry *ls_debug_waiters_dentry; /* debugfs */
David Teiglandac90a252007-07-06 09:47:08 -0500480 struct dentry *ls_debug_locks_dentry; /* debugfs */
David Teiglande7fd4172006-01-18 09:30:29 +0000481
482 wait_queue_head_t ls_uevent_wait; /* user part of join/leave */
483 int ls_uevent_result;
David Teigland8b0e7b22007-05-18 09:03:35 -0500484 struct completion ls_members_done;
485 int ls_members_result;
David Teiglande7fd4172006-01-18 09:30:29 +0000486
David Teigland597d0ca2006-07-12 16:44:04 -0500487 struct miscdevice ls_device;
488
David Teiglande7fd4172006-01-18 09:30:29 +0000489 /* recovery related */
490
491 struct timer_list ls_timer;
492 struct task_struct *ls_recoverd_task;
David Teigland90135922006-01-20 08:47:07 +0000493 struct mutex ls_recoverd_active;
David Teiglande7fd4172006-01-18 09:30:29 +0000494 spinlock_t ls_recover_lock;
David Teigland3ae1acf2007-05-18 08:59:31 -0500495 unsigned long ls_recover_begin; /* jiffies timestamp */
David Teiglande7fd4172006-01-18 09:30:29 +0000496 uint32_t ls_recover_status; /* DLM_RS_ */
497 uint64_t ls_recover_seq;
498 struct dlm_recover *ls_recover_args;
499 struct rw_semaphore ls_in_recovery; /* block local requests */
David Teiglandc36258b2007-09-27 15:53:38 -0500500 struct rw_semaphore ls_recv_active; /* block dlm_recv */
David Teiglande7fd4172006-01-18 09:30:29 +0000501 struct list_head ls_requestqueue;/* queue remote requests */
David Teigland90135922006-01-20 08:47:07 +0000502 struct mutex ls_requestqueue_mutex;
Al Viro40076852008-01-25 03:01:51 -0500503 struct dlm_rcom *ls_recover_buf;
David Teiglandfaa0f262006-08-08 17:08:42 -0500504 int ls_recover_nodeid; /* for debugging */
David Teigland4a99c3d2006-08-09 11:20:15 -0500505 uint64_t ls_rcom_seq;
David Teigland98f176f2006-11-27 13:19:28 -0600506 spinlock_t ls_rcom_spin;
David Teiglande7fd4172006-01-18 09:30:29 +0000507 struct list_head ls_recover_list;
508 spinlock_t ls_recover_list_lock;
509 int ls_recover_list_count;
510 wait_queue_head_t ls_wait_general;
David Teigland597d0ca2006-07-12 16:44:04 -0500511 struct mutex ls_clear_proc_locks;
David Teiglande7fd4172006-01-18 09:30:29 +0000512
513 struct list_head ls_root_list; /* root resources */
514 struct rw_semaphore ls_root_sem; /* protect root_list */
515
516 int ls_namelen;
517 char ls_name[1];
518};
519
520#define LSFL_WORK 0
521#define LSFL_RUNNING 1
522#define LSFL_RECOVERY_STOP 2
523#define LSFL_RCOM_READY 3
David Teigland98f176f2006-11-27 13:19:28 -0600524#define LSFL_RCOM_WAIT 4
525#define LSFL_UEVENT_WAIT 5
David Teigland3ae1acf2007-05-18 08:59:31 -0500526#define LSFL_TIMEWARN 6
David Teiglande7fd4172006-01-18 09:30:29 +0000527
David Teigland597d0ca2006-07-12 16:44:04 -0500528/* much of this is just saving user space pointers associated with the
529 lock that we pass back to the user lib with an ast */
530
531struct dlm_user_args {
532 struct dlm_user_proc *proc; /* each process that opens the lockspace
533 device has private data
534 (dlm_user_proc) on the struct file,
535 the process's locks point back to it*/
536 struct dlm_lksb lksb;
537 int old_mode;
538 int update_user_lvb;
539 struct dlm_lksb __user *user_lksb;
540 void __user *castparam;
541 void __user *castaddr;
542 void __user *bastparam;
543 void __user *bastaddr;
David Teiglandd7db9232007-05-18 09:00:32 -0500544 uint64_t xid;
David Teigland597d0ca2006-07-12 16:44:04 -0500545};
546
547#define DLM_PROC_FLAGS_CLOSING 1
548#define DLM_PROC_FLAGS_COMPAT 2
549
550/* locks list is kept so we can remove all a process's locks when it
551 exits (or orphan those that are persistent) */
552
553struct dlm_user_proc {
554 dlm_lockspace_t *lockspace;
555 unsigned long flags; /* DLM_PROC_FLAGS */
556 struct list_head asts;
557 spinlock_t asts_spin;
558 struct list_head locks;
559 spinlock_t locks_spin;
David Teiglanda1bc86e2007-01-15 10:34:52 -0600560 struct list_head unlocking;
David Teigland597d0ca2006-07-12 16:44:04 -0500561 wait_queue_head_t wait;
562};
563
David Teiglande7fd4172006-01-18 09:30:29 +0000564static inline int dlm_locking_stopped(struct dlm_ls *ls)
565{
566 return !test_bit(LSFL_RUNNING, &ls->ls_flags);
567}
568
569static inline int dlm_recovery_stopped(struct dlm_ls *ls)
570{
571 return test_bit(LSFL_RECOVERY_STOP, &ls->ls_flags);
572}
573
574static inline int dlm_no_directory(struct dlm_ls *ls)
575{
576 return (ls->ls_exflags & DLM_LSFL_NODIR) ? 1 : 0;
577}
578
Adrian Bunke0283982007-11-03 01:04:30 +0100579int dlm_netlink_init(void);
580void dlm_netlink_exit(void);
581void dlm_timeout_warn(struct dlm_lkb *lkb);
David Teigland24022112008-03-14 15:09:15 -0500582int dlm_plock_init(void);
583void dlm_plock_exit(void);
Adrian Bunke0283982007-11-03 01:04:30 +0100584
585#ifdef CONFIG_DLM_DEBUG
586int dlm_register_debugfs(void);
587void dlm_unregister_debugfs(void);
588int dlm_create_debug_file(struct dlm_ls *ls);
589void dlm_delete_debug_file(struct dlm_ls *ls);
590#else
591static inline int dlm_register_debugfs(void) { return 0; }
592static inline void dlm_unregister_debugfs(void) { }
593static inline int dlm_create_debug_file(struct dlm_ls *ls) { return 0; }
594static inline void dlm_delete_debug_file(struct dlm_ls *ls) { }
595#endif
596
David Teiglande7fd4172006-01-18 09:30:29 +0000597#endif /* __DLM_INTERNAL_DOT_H__ */
598