blob: 871c1abf6029869ba7157c2f0db032eaabe951f3 [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 Teigland60f98d12011-11-02 14:30:58 -05005** Copyright (C) 2004-2011 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 Teigland3d6aa672011-07-06 17:00:54 -050040#include <linux/idr.h>
David Teiglandd6e24782012-04-23 13:58:42 -050041#include <linux/ratelimit.h>
David Teiglande7fd4172006-01-18 09:30:29 +000042#include <asm/uaccess.h>
43
44#include <linux/dlm.h>
David Teigland99fc6482007-01-09 09:44:01 -060045#include "config.h"
David Teiglande7fd4172006-01-18 09:30:29 +000046
David Teiglande7fd4172006-01-18 09:30:29 +000047/* Size of the temp buffer midcomms allocates on the stack.
48 We try to make this large enough so most messages fit.
49 FIXME: should sctp make this unnecessary? */
50
51#define DLM_INBUF_LEN 148
52
53struct dlm_ls;
54struct dlm_lkb;
55struct dlm_rsb;
56struct dlm_member;
David Teiglande7fd4172006-01-18 09:30:29 +000057struct dlm_rsbtable;
David Teiglande7fd4172006-01-18 09:30:29 +000058struct dlm_recover;
59struct dlm_header;
60struct dlm_message;
61struct dlm_rcom;
62struct dlm_mhandle;
63
64#define log_print(fmt, args...) \
65 printk(KERN_ERR "dlm: "fmt"\n" , ##args)
66#define log_error(ls, fmt, args...) \
67 printk(KERN_ERR "dlm: %s: " fmt "\n", (ls)->ls_name , ##args)
68
David Teigland99fc6482007-01-09 09:44:01 -060069#define log_debug(ls, fmt, args...) \
70do { \
71 if (dlm_config.ci_log_debug) \
72 printk(KERN_DEBUG "dlm: %s: " fmt "\n", \
73 (ls)->ls_name , ##args); \
74} while (0)
David Teiglande7fd4172006-01-18 09:30:29 +000075
David Teiglandd6e24782012-04-23 13:58:42 -050076#define log_limit(ls, fmt, args...) \
77do { \
78 if (dlm_config.ci_log_debug) \
79 printk_ratelimited(KERN_DEBUG "dlm: %s: " fmt "\n", \
80 (ls)->ls_name , ##args); \
81} while (0)
82
David Teiglande7fd4172006-01-18 09:30:29 +000083#define DLM_ASSERT(x, do) \
84{ \
85 if (!(x)) \
86 { \
87 printk(KERN_ERR "\nDLM: Assertion failed on line %d of file %s\n" \
88 "DLM: assertion: \"%s\"\n" \
89 "DLM: time = %lu\n", \
90 __LINE__, __FILE__, #x, jiffies); \
91 {do} \
92 printk("\n"); \
93 BUG(); \
94 panic("DLM: Record message above and reboot.\n"); \
95 } \
96}
97
98
David Teiglande7fd4172006-01-18 09:30:29 +000099struct dlm_rsbtable {
Bob Peterson9beb3bf2011-10-26 15:24:55 -0500100 struct rb_root keep;
101 struct rb_root toss;
David Teiglandc7be7612009-01-07 16:50:41 -0600102 spinlock_t lock;
David Teiglande7fd4172006-01-18 09:30:29 +0000103};
104
David Teiglande7fd4172006-01-18 09:30:29 +0000105
106/*
107 * Lockspace member (per node in a ls)
108 */
109
110struct dlm_member {
111 struct list_head list;
112 int nodeid;
113 int weight;
David Teigland757a4272011-10-20 13:26:28 -0500114 int slot;
115 int slot_prev;
David Teigland60f98d12011-11-02 14:30:58 -0500116 int comm_seq;
David Teigland757a4272011-10-20 13:26:28 -0500117 uint32_t generation;
118};
119
120/*
David Teiglande7fd4172006-01-18 09:30:29 +0000121 * Save and manage recovery state for a lockspace.
122 */
123
124struct dlm_recover {
125 struct list_head list;
David Teigland60f98d12011-11-02 14:30:58 -0500126 struct dlm_config_node *nodes;
127 int nodes_count;
David Teiglande7fd4172006-01-18 09:30:29 +0000128 uint64_t seq;
129};
130
131/*
132 * Pass input args to second stage locking function.
133 */
134
135struct dlm_args {
136 uint32_t flags;
David Teiglande5dae542008-02-06 00:35:45 -0600137 void (*astfn) (void *astparam);
138 void *astparam;
139 void (*bastfn) (void *astparam, int mode);
David Teiglande7fd4172006-01-18 09:30:29 +0000140 int mode;
141 struct dlm_lksb *lksb;
David Teiglandd7db9232007-05-18 09:00:32 -0500142 unsigned long timeout;
David Teiglande7fd4172006-01-18 09:30:29 +0000143};
144
145
146/*
147 * Lock block
148 *
149 * A lock can be one of three types:
150 *
151 * local copy lock is mastered locally
152 * (lkb_nodeid is zero and DLM_LKF_MSTCPY is not set)
153 * process copy lock is mastered on a remote node
154 * (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is not set)
155 * master copy master node's copy of a lock owned by remote node
156 * (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is set)
157 *
158 * lkb_exflags: a copy of the most recent flags arg provided to dlm_lock or
159 * dlm_unlock. The dlm does not modify these or use any private flags in
160 * this field; it only contains DLM_LKF_ flags from dlm.h. These flags
161 * are sent as-is to the remote master when the lock is remote.
162 *
163 * lkb_flags: internal dlm flags (DLM_IFL_ prefix) from dlm_internal.h.
164 * Some internal flags are shared between the master and process nodes;
165 * these shared flags are kept in the lower two bytes. One of these
166 * flags set on the master copy will be propagated to the process copy
167 * and v.v. Other internal flags are private to the master or process
168 * node (e.g. DLM_IFL_MSTCPY). These are kept in the high two bytes.
169 *
170 * lkb_sbflags: status block flags. These flags are copied directly into
171 * the caller's lksb.sb_flags prior to the dlm_lock/dlm_unlock completion
172 * ast. All defined in dlm.h with DLM_SBF_ prefix.
173 *
174 * lkb_status: the lock status indicates which rsb queue the lock is
175 * on, grant, convert, or wait. DLM_LKSTS_ WAITING/GRANTED/CONVERT
176 *
177 * lkb_wait_type: the dlm message type (DLM_MSG_ prefix) for which a
178 * reply is needed. Only set when the lkb is on the lockspace waiters
179 * list awaiting a reply from a remote node.
180 *
181 * lkb_nodeid: when the lkb is a local copy, nodeid is 0; when the lkb
182 * is a master copy, nodeid specifies the remote lock holder, when the
183 * lkb is a process copy, the nodeid specifies the lock master.
184 */
185
David Teiglande7fd4172006-01-18 09:30:29 +0000186/* lkb_status */
187
188#define DLM_LKSTS_WAITING 1
189#define DLM_LKSTS_GRANTED 2
190#define DLM_LKSTS_CONVERT 3
191
192/* lkb_flags */
193
194#define DLM_IFL_MSTCPY 0x00010000
195#define DLM_IFL_RESEND 0x00020000
David Teigland597d0ca2006-07-12 16:44:04 -0500196#define DLM_IFL_DEAD 0x00040000
David Teiglandef0c2bb2007-03-28 09:56:46 -0500197#define DLM_IFL_OVERLAP_UNLOCK 0x00080000
198#define DLM_IFL_OVERLAP_CANCEL 0x00100000
199#define DLM_IFL_ENDOFLIFE 0x00200000
David Teigland3ae1acf2007-05-18 08:59:31 -0500200#define DLM_IFL_WATCH_TIMEWARN 0x00400000
David Teigland84d8cd62007-05-29 08:44:23 -0500201#define DLM_IFL_TIMEOUT_CANCEL 0x00800000
David Teigland8b4021f2007-05-29 08:46:00 -0500202#define DLM_IFL_DEADLOCK_CANCEL 0x01000000
David Teigland2a7ce0e2011-04-04 15:19:59 -0500203#define DLM_IFL_STUB_MS 0x02000000 /* magic number for m_flags */
David Teigland597d0ca2006-07-12 16:44:04 -0500204#define DLM_IFL_USER 0x00000001
205#define DLM_IFL_ORPHAN 0x00000002
David Teiglande7fd4172006-01-18 09:30:29 +0000206
David Teigland8304d6f2011-02-21 14:58:21 -0600207#define DLM_CALLBACKS_SIZE 6
208
209#define DLM_CB_CAST 0x00000001
210#define DLM_CB_BAST 0x00000002
211#define DLM_CB_SKIP 0x00000004
212
213struct dlm_callback {
214 uint64_t seq;
215 uint32_t flags; /* DLM_CBF_ */
216 int sb_status; /* copy to lksb status */
217 uint8_t sb_flags; /* copy to lksb flags */
218 int8_t mode; /* rq mode of bast, gr mode of cast */
219};
220
David Teiglande7fd4172006-01-18 09:30:29 +0000221struct dlm_lkb {
222 struct dlm_rsb *lkb_resource; /* the rsb */
223 struct kref lkb_ref;
224 int lkb_nodeid; /* copied from rsb */
225 int lkb_ownpid; /* pid of lock owner */
226 uint32_t lkb_id; /* our lock ID */
227 uint32_t lkb_remid; /* lock ID on remote partner */
228 uint32_t lkb_exflags; /* external flags from caller */
229 uint32_t lkb_sbflags; /* lksb flags */
230 uint32_t lkb_flags; /* internal flags */
231 uint32_t lkb_lvbseq; /* lvb sequence number */
232
233 int8_t lkb_status; /* granted, waiting, convert */
234 int8_t lkb_rqmode; /* requested lock mode */
235 int8_t lkb_grmode; /* granted lock mode */
David Teiglande7fd4172006-01-18 09:30:29 +0000236 int8_t lkb_highbast; /* highest mode bast sent for */
David Teigland7fe2b312010-02-24 11:08:18 -0600237
David Teiglande7fd4172006-01-18 09:30:29 +0000238 int8_t lkb_wait_type; /* type of reply waiting for */
David Teiglandef0c2bb2007-03-28 09:56:46 -0500239 int8_t lkb_wait_count;
David Teiglandc6ff6692011-03-28 14:17:26 -0500240 int lkb_wait_nodeid; /* for debugging */
David Teiglande7fd4172006-01-18 09:30:29 +0000241
David Teiglande7fd4172006-01-18 09:30:29 +0000242 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 */
David Teigland597d0ca2006-07-12 16:44:04 -0500245 struct list_head lkb_ownqueue; /* list of locks for a process */
David Teigland3ae1acf2007-05-18 08:59:31 -0500246 struct list_head lkb_time_list;
David Teiglandeeda4182008-12-09 14:12:21 -0600247 ktime_t lkb_timestamp;
David Teiglandc6ff6692011-03-28 14:17:26 -0500248 ktime_t lkb_wait_time;
David Teigland3ae1acf2007-05-18 08:59:31 -0500249 unsigned long lkb_timeout_cs;
David Teiglande7fd4172006-01-18 09:30:29 +0000250
David Teigland23e8e1a2011-04-05 13:16:24 -0500251 struct mutex lkb_cb_mutex;
252 struct work_struct lkb_cb_work;
253 struct list_head lkb_cb_list; /* for ls_cb_delay or proc->asts */
David Teigland8304d6f2011-02-21 14:58:21 -0600254 struct dlm_callback lkb_callbacks[DLM_CALLBACKS_SIZE];
255 struct dlm_callback lkb_last_cast;
256 struct dlm_callback lkb_last_bast;
257 ktime_t lkb_last_cast_time; /* for debugging */
258 ktime_t lkb_last_bast_time; /* for debugging */
259
David Teigland48756472012-04-26 15:54:29 -0500260 uint64_t lkb_recover_seq; /* from ls_recover_seq */
261
David Teiglande7fd4172006-01-18 09:30:29 +0000262 char *lkb_lvbptr;
263 struct dlm_lksb *lkb_lksb; /* caller's status block */
David Teiglande5dae542008-02-06 00:35:45 -0600264 void (*lkb_astfn) (void *astparam);
265 void (*lkb_bastfn) (void *astparam, int mode);
David Teiglandd292c0c2008-02-06 23:27:04 -0600266 union {
267 void *lkb_astparam; /* caller's ast arg */
268 struct dlm_user_args *lkb_ua;
269 };
David Teiglande7fd4172006-01-18 09:30:29 +0000270};
271
David Teiglandc04fecb2012-05-10 10:18:07 -0500272/*
273 * res_master_nodeid is "normal": 0 is unset/invalid, non-zero is the real
274 * nodeid, even when nodeid is our_nodeid.
275 *
276 * res_nodeid is "odd": -1 is unset/invalid, zero means our_nodeid,
277 * greater than zero when another nodeid.
278 *
279 * (TODO: remove res_nodeid and only use res_master_nodeid)
280 */
David Teiglande7fd4172006-01-18 09:30:29 +0000281
282struct dlm_rsb {
283 struct dlm_ls *res_ls; /* the lockspace */
284 struct kref res_ref;
David Teigland90135922006-01-20 08:47:07 +0000285 struct mutex res_mutex;
David Teiglande7fd4172006-01-18 09:30:29 +0000286 unsigned long res_flags;
287 int res_length; /* length of rsb name */
288 int res_nodeid;
David Teiglandc04fecb2012-05-10 10:18:07 -0500289 int res_master_nodeid;
290 int res_dir_nodeid;
David Teigland1d7c4842012-05-15 16:07:49 -0500291 int res_id; /* for ls_recover_idr */
David Teiglande7fd4172006-01-18 09:30:29 +0000292 uint32_t res_lvbseq;
293 uint32_t res_hash;
294 uint32_t res_bucket; /* rsbtbl */
295 unsigned long res_toss_time;
296 uint32_t res_first_lkid;
297 struct list_head res_lookup; /* lkbs waiting on first */
Bob Peterson9beb3bf2011-10-26 15:24:55 -0500298 union {
299 struct list_head res_hashchain;
300 struct rb_node res_hashnode; /* rsbtbl */
301 };
David Teiglande7fd4172006-01-18 09:30:29 +0000302 struct list_head res_grantqueue;
303 struct list_head res_convertqueue;
304 struct list_head res_waitqueue;
305
306 struct list_head res_root_list; /* used for recovery */
307 struct list_head res_recover_list; /* used for recovery */
308 int res_recover_locks_count;
309
310 char *res_lvbptr;
David Teigland3881ac02011-07-07 14:05:03 -0500311 char res_name[DLM_RESNAME_MAXLEN+1];
David Teiglande7fd4172006-01-18 09:30:29 +0000312};
313
David Teiglandc04fecb2012-05-10 10:18:07 -0500314/* dlm_master_lookup() flags */
315
316#define DLM_LU_RECOVER_DIR 1
317#define DLM_LU_RECOVER_MASTER 2
318
319/* dlm_master_lookup() results */
320
321#define DLM_LU_MATCH 1
322#define DLM_LU_ADD 2
323
David Teiglande7fd4172006-01-18 09:30:29 +0000324/* find_rsb() flags */
325
David Teiglandc04fecb2012-05-10 10:18:07 -0500326#define R_REQUEST 0x00000001
327#define R_RECEIVE_REQUEST 0x00000002
328#define R_RECEIVE_RECOVER 0x00000004
David Teiglande7fd4172006-01-18 09:30:29 +0000329
330/* rsb_flags */
331
332enum rsb_flags {
333 RSB_MASTER_UNCERTAIN,
334 RSB_VALNOTVALID,
335 RSB_VALNOTVALID_PREV,
336 RSB_NEW_MASTER,
337 RSB_NEW_MASTER2,
338 RSB_RECOVER_CONVERT,
David Teigland48756472012-04-26 15:54:29 -0500339 RSB_RECOVER_GRANT,
David Teiglande7fd4172006-01-18 09:30:29 +0000340};
341
342static inline void rsb_set_flag(struct dlm_rsb *r, enum rsb_flags flag)
343{
344 __set_bit(flag, &r->res_flags);
345}
346
347static inline void rsb_clear_flag(struct dlm_rsb *r, enum rsb_flags flag)
348{
349 __clear_bit(flag, &r->res_flags);
350}
351
352static inline int rsb_flag(struct dlm_rsb *r, enum rsb_flags flag)
353{
354 return test_bit(flag, &r->res_flags);
355}
356
357
358/* dlm_header is first element of all structs sent between nodes */
359
David Teigland38aa8b02006-12-13 10:37:16 -0600360#define DLM_HEADER_MAJOR 0x00030000
David Teigland757a4272011-10-20 13:26:28 -0500361#define DLM_HEADER_MINOR 0x00000001
362
363#define DLM_HEADER_SLOTS 0x00000001
David Teiglande7fd4172006-01-18 09:30:29 +0000364
365#define DLM_MSG 1
366#define DLM_RCOM 2
367
368struct dlm_header {
369 uint32_t h_version;
370 uint32_t h_lockspace;
371 uint32_t h_nodeid; /* nodeid of sender */
372 uint16_t h_length;
373 uint8_t h_cmd; /* DLM_MSG, DLM_RCOM */
374 uint8_t h_pad;
375};
376
377
378#define DLM_MSG_REQUEST 1
379#define DLM_MSG_CONVERT 2
380#define DLM_MSG_UNLOCK 3
381#define DLM_MSG_CANCEL 4
382#define DLM_MSG_REQUEST_REPLY 5
383#define DLM_MSG_CONVERT_REPLY 6
384#define DLM_MSG_UNLOCK_REPLY 7
385#define DLM_MSG_CANCEL_REPLY 8
386#define DLM_MSG_GRANT 9
387#define DLM_MSG_BAST 10
388#define DLM_MSG_LOOKUP 11
389#define DLM_MSG_REMOVE 12
390#define DLM_MSG_LOOKUP_REPLY 13
David Teigland84991372007-03-30 15:02:40 -0500391#define DLM_MSG_PURGE 14
David Teiglande7fd4172006-01-18 09:30:29 +0000392
393struct dlm_message {
394 struct dlm_header m_header;
395 uint32_t m_type; /* DLM_MSG_ */
396 uint32_t m_nodeid;
397 uint32_t m_pid;
398 uint32_t m_lkid; /* lkid on sender */
399 uint32_t m_remid; /* lkid on receiver */
400 uint32_t m_parent_lkid;
401 uint32_t m_parent_remid;
402 uint32_t m_exflags;
403 uint32_t m_sbflags;
404 uint32_t m_flags;
405 uint32_t m_lvbseq;
406 uint32_t m_hash;
407 int m_status;
408 int m_grmode;
409 int m_rqmode;
410 int m_bastmode;
411 int m_asts;
412 int m_result; /* 0 or -EXXX */
David Teiglande7fd4172006-01-18 09:30:29 +0000413 char m_extra[0]; /* name or lvb */
414};
415
416
417#define DLM_RS_NODES 0x00000001
418#define DLM_RS_NODES_ALL 0x00000002
419#define DLM_RS_DIR 0x00000004
420#define DLM_RS_DIR_ALL 0x00000008
421#define DLM_RS_LOCKS 0x00000010
422#define DLM_RS_LOCKS_ALL 0x00000020
423#define DLM_RS_DONE 0x00000040
424#define DLM_RS_DONE_ALL 0x00000080
425
426#define DLM_RCOM_STATUS 1
427#define DLM_RCOM_NAMES 2
428#define DLM_RCOM_LOOKUP 3
429#define DLM_RCOM_LOCK 4
430#define DLM_RCOM_STATUS_REPLY 5
431#define DLM_RCOM_NAMES_REPLY 6
432#define DLM_RCOM_LOOKUP_REPLY 7
433#define DLM_RCOM_LOCK_REPLY 8
434
435struct dlm_rcom {
436 struct dlm_header rc_header;
437 uint32_t rc_type; /* DLM_RCOM_ */
438 int rc_result; /* multi-purpose */
439 uint64_t rc_id; /* match reply with request */
David Teigland38aa8b02006-12-13 10:37:16 -0600440 uint64_t rc_seq; /* sender's ls_recover_seq */
441 uint64_t rc_seq_reply; /* remote ls_recover_seq */
David Teiglande7fd4172006-01-18 09:30:29 +0000442 char rc_buf[0];
443};
444
Al Viroeef7d732008-01-25 00:58:46 -0500445union dlm_packet {
446 struct dlm_header header; /* common to other two */
447 struct dlm_message message;
448 struct dlm_rcom rcom;
449};
450
David Teigland757a4272011-10-20 13:26:28 -0500451#define DLM_RSF_NEED_SLOTS 0x00000001
452
453/* RCOM_STATUS data */
454struct rcom_status {
455 __le32 rs_flags;
456 __le32 rs_unused1;
457 __le64 rs_unused2;
458};
459
460/* RCOM_STATUS_REPLY data */
David Teiglande7fd4172006-01-18 09:30:29 +0000461struct rcom_config {
Al Viro93ff2972008-01-25 02:34:00 -0500462 __le32 rf_lvblen;
463 __le32 rf_lsflags;
David Teigland757a4272011-10-20 13:26:28 -0500464
465 /* DLM_HEADER_SLOTS adds: */
466 __le32 rf_flags;
467 __le16 rf_our_slot;
468 __le16 rf_num_slots;
469 __le32 rf_generation;
470 __le32 rf_unused1;
471 __le64 rf_unused2;
472};
473
474struct rcom_slot {
475 __le32 ro_nodeid;
476 __le16 ro_slot;
477 __le16 ro_unused1;
478 __le64 ro_unused2;
David Teiglande7fd4172006-01-18 09:30:29 +0000479};
480
481struct rcom_lock {
Al Viro163a1852008-01-25 02:08:26 -0500482 __le32 rl_ownpid;
483 __le32 rl_lkid;
484 __le32 rl_remid;
485 __le32 rl_parent_lkid;
486 __le32 rl_parent_remid;
487 __le32 rl_exflags;
488 __le32 rl_flags;
489 __le32 rl_lvbseq;
490 __le32 rl_result;
David Teiglande7fd4172006-01-18 09:30:29 +0000491 int8_t rl_rqmode;
492 int8_t rl_grmode;
493 int8_t rl_status;
494 int8_t rl_asts;
Al Viro163a1852008-01-25 02:08:26 -0500495 __le16 rl_wait_type;
496 __le16 rl_namelen;
David Teiglande7fd4172006-01-18 09:30:29 +0000497 char rl_name[DLM_RESNAME_MAXLEN];
498 char rl_lvb[0];
499};
500
David Teigland05c32f42012-06-14 12:17:32 -0500501/*
502 * The max number of resources per rsbtbl bucket that shrink will attempt
503 * to remove in each iteration.
504 */
505
506#define DLM_REMOVE_NAMES_MAX 8
507
David Teiglande7fd4172006-01-18 09:30:29 +0000508struct dlm_ls {
509 struct list_head ls_list; /* list of lockspaces */
David Teigland597d0ca2006-07-12 16:44:04 -0500510 dlm_lockspace_t *ls_local_handle;
David Teiglande7fd4172006-01-18 09:30:29 +0000511 uint32_t ls_global_id; /* global unique lockspace ID */
David Teigland757a4272011-10-20 13:26:28 -0500512 uint32_t ls_generation;
David Teiglande7fd4172006-01-18 09:30:29 +0000513 uint32_t ls_exflags;
514 int ls_lvblen;
David Teigland0f8e0d92008-08-06 13:30:24 -0500515 int ls_count; /* refcount of processes in
516 the dlm using this ls */
517 int ls_create_count; /* create/release refcount */
David Teiglande7fd4172006-01-18 09:30:29 +0000518 unsigned long ls_flags; /* LSFL_ */
David Teiglandc1dcf652008-08-18 14:03:25 -0500519 unsigned long ls_scan_time;
David Teiglande7fd4172006-01-18 09:30:29 +0000520 struct kobject ls_kobj;
521
David Teigland3d6aa672011-07-06 17:00:54 -0500522 struct idr ls_lkbidr;
523 spinlock_t ls_lkbidr_spin;
524
David Teiglande7fd4172006-01-18 09:30:29 +0000525 struct dlm_rsbtable *ls_rsbtbl;
526 uint32_t ls_rsbtbl_size;
527
David Teigland90135922006-01-20 08:47:07 +0000528 struct mutex ls_waiters_mutex;
David Teiglande7fd4172006-01-18 09:30:29 +0000529 struct list_head ls_waiters; /* lkbs needing a reply */
530
David Teiglandef0c2bb2007-03-28 09:56:46 -0500531 struct mutex ls_orphans_mutex;
532 struct list_head ls_orphans;
533
David Teigland3ae1acf2007-05-18 08:59:31 -0500534 struct mutex ls_timeout_mutex;
535 struct list_head ls_timeout;
536
David Teigland3881ac02011-07-07 14:05:03 -0500537 spinlock_t ls_new_rsb_spin;
538 int ls_new_rsb_count;
539 struct list_head ls_new_rsb; /* new rsb structs */
540
David Teigland05c32f42012-06-14 12:17:32 -0500541 spinlock_t ls_remove_spin;
542 char ls_remove_name[DLM_RESNAME_MAXLEN+1];
543 char *ls_remove_names[DLM_REMOVE_NAMES_MAX];
544 int ls_remove_len;
545 int ls_remove_lens[DLM_REMOVE_NAMES_MAX];
546
David Teiglande7fd4172006-01-18 09:30:29 +0000547 struct list_head ls_nodes; /* current nodes in ls */
548 struct list_head ls_nodes_gone; /* dead node list, recovery */
549 int ls_num_nodes; /* number of nodes in ls */
550 int ls_low_nodeid;
551 int ls_total_weight;
552 int *ls_node_array;
553
David Teigland757a4272011-10-20 13:26:28 -0500554 int ls_slot;
555 int ls_num_slots;
556 int ls_slots_size;
557 struct dlm_slot *ls_slots;
558
David Teiglande7fd4172006-01-18 09:30:29 +0000559 struct dlm_rsb ls_stub_rsb; /* for returning errors */
560 struct dlm_lkb ls_stub_lkb; /* for returning errors */
561 struct dlm_message ls_stub_ms; /* for faking a reply */
562
David Teigland5de63192006-07-25 13:44:31 -0500563 struct dentry *ls_debug_rsb_dentry; /* debugfs */
564 struct dentry *ls_debug_waiters_dentry; /* debugfs */
David Teiglandac90a252007-07-06 09:47:08 -0500565 struct dentry *ls_debug_locks_dentry; /* debugfs */
David Teiglandd0225092008-12-16 14:53:23 -0600566 struct dentry *ls_debug_all_dentry; /* debugfs */
David Teiglandc04fecb2012-05-10 10:18:07 -0500567 struct dentry *ls_debug_toss_dentry; /* debugfs */
David Teiglande7fd4172006-01-18 09:30:29 +0000568
569 wait_queue_head_t ls_uevent_wait; /* user part of join/leave */
570 int ls_uevent_result;
David Teigland8b0e7b22007-05-18 09:03:35 -0500571 struct completion ls_members_done;
572 int ls_members_result;
David Teiglande7fd4172006-01-18 09:30:29 +0000573
David Teigland597d0ca2006-07-12 16:44:04 -0500574 struct miscdevice ls_device;
575
David Teigland23e8e1a2011-04-05 13:16:24 -0500576 struct workqueue_struct *ls_callback_wq;
577
David Teiglande7fd4172006-01-18 09:30:29 +0000578 /* recovery related */
579
David Teigland23e8e1a2011-04-05 13:16:24 -0500580 struct mutex ls_cb_mutex;
581 struct list_head ls_cb_delay; /* save for queue_work later */
David Teiglande7fd4172006-01-18 09:30:29 +0000582 struct timer_list ls_timer;
583 struct task_struct *ls_recoverd_task;
David Teigland90135922006-01-20 08:47:07 +0000584 struct mutex ls_recoverd_active;
David Teiglande7fd4172006-01-18 09:30:29 +0000585 spinlock_t ls_recover_lock;
David Teigland3ae1acf2007-05-18 08:59:31 -0500586 unsigned long ls_recover_begin; /* jiffies timestamp */
David Teiglande7fd4172006-01-18 09:30:29 +0000587 uint32_t ls_recover_status; /* DLM_RS_ */
588 uint64_t ls_recover_seq;
589 struct dlm_recover *ls_recover_args;
590 struct rw_semaphore ls_in_recovery; /* block local requests */
David Teiglandc36258b2007-09-27 15:53:38 -0500591 struct rw_semaphore ls_recv_active; /* block dlm_recv */
David Teiglande7fd4172006-01-18 09:30:29 +0000592 struct list_head ls_requestqueue;/* queue remote requests */
David Teigland90135922006-01-20 08:47:07 +0000593 struct mutex ls_requestqueue_mutex;
Al Viro40076852008-01-25 03:01:51 -0500594 struct dlm_rcom *ls_recover_buf;
David Teiglandfaa0f262006-08-08 17:08:42 -0500595 int ls_recover_nodeid; /* for debugging */
David Teiglandc04fecb2012-05-10 10:18:07 -0500596 unsigned int ls_recover_dir_sent_res; /* for log info */
597 unsigned int ls_recover_dir_sent_msg; /* for log info */
David Teigland48756472012-04-26 15:54:29 -0500598 unsigned int ls_recover_locks_in; /* for log info */
David Teigland4a99c3d2006-08-09 11:20:15 -0500599 uint64_t ls_rcom_seq;
David Teigland98f176f2006-11-27 13:19:28 -0600600 spinlock_t ls_rcom_spin;
David Teiglande7fd4172006-01-18 09:30:29 +0000601 struct list_head ls_recover_list;
602 spinlock_t ls_recover_list_lock;
603 int ls_recover_list_count;
David Teigland1d7c4842012-05-15 16:07:49 -0500604 struct idr ls_recover_idr;
605 spinlock_t ls_recover_idr_lock;
David Teiglande7fd4172006-01-18 09:30:29 +0000606 wait_queue_head_t ls_wait_general;
David Teigland475f2302012-08-02 11:08:21 -0500607 wait_queue_head_t ls_recover_lock_wait;
David Teigland597d0ca2006-07-12 16:44:04 -0500608 struct mutex ls_clear_proc_locks;
David Teiglande7fd4172006-01-18 09:30:29 +0000609
610 struct list_head ls_root_list; /* root resources */
611 struct rw_semaphore ls_root_sem; /* protect root_list */
612
David Teigland60f98d12011-11-02 14:30:58 -0500613 const struct dlm_lockspace_ops *ls_ops;
614 void *ls_ops_arg;
615
David Teiglande7fd4172006-01-18 09:30:29 +0000616 int ls_namelen;
617 char ls_name[1];
618};
619
David Teigland475f2302012-08-02 11:08:21 -0500620/*
621 * LSFL_RECOVER_STOP - dlm_ls_stop() sets this to tell dlm recovery routines
622 * that they should abort what they're doing so new recovery can be started.
623 *
624 * LSFL_RECOVER_DOWN - dlm_ls_stop() sets this to tell dlm_recoverd that it
625 * should do down_write() on the in_recovery rw_semaphore. (doing down_write
626 * within dlm_ls_stop causes complaints about the lock acquired/released
627 * in different contexts.)
628 *
629 * LSFL_RECOVER_LOCK - dlm_recoverd holds the in_recovery rw_semaphore.
630 * It sets this after it is done with down_write() on the in_recovery
631 * rw_semaphore and clears it after it has released the rw_semaphore.
632 *
633 * LSFL_RECOVER_WORK - dlm_ls_start() sets this to tell dlm_recoverd that it
634 * should begin recovery of the lockspace.
635 *
636 * LSFL_RUNNING - set when normal locking activity is enabled.
637 * dlm_ls_stop() clears this to tell dlm locking routines that they should
638 * quit what they are doing so recovery can run. dlm_recoverd sets
639 * this after recovery is finished.
640 */
641
642#define LSFL_RECOVER_STOP 0
643#define LSFL_RECOVER_DOWN 1
644#define LSFL_RECOVER_LOCK 2
645#define LSFL_RECOVER_WORK 3
646#define LSFL_RUNNING 4
647
648#define LSFL_RCOM_READY 5
649#define LSFL_RCOM_WAIT 6
650#define LSFL_UEVENT_WAIT 7
651#define LSFL_TIMEWARN 8
652#define LSFL_CB_DELAY 9
653#define LSFL_NODIR 10
David Teiglande7fd4172006-01-18 09:30:29 +0000654
David Teigland597d0ca2006-07-12 16:44:04 -0500655/* much of this is just saving user space pointers associated with the
656 lock that we pass back to the user lib with an ast */
657
658struct dlm_user_args {
659 struct dlm_user_proc *proc; /* each process that opens the lockspace
660 device has private data
661 (dlm_user_proc) on the struct file,
662 the process's locks point back to it*/
663 struct dlm_lksb lksb;
David Teigland597d0ca2006-07-12 16:44:04 -0500664 struct dlm_lksb __user *user_lksb;
665 void __user *castparam;
666 void __user *castaddr;
667 void __user *bastparam;
668 void __user *bastaddr;
David Teiglandd7db9232007-05-18 09:00:32 -0500669 uint64_t xid;
David Teigland597d0ca2006-07-12 16:44:04 -0500670};
671
672#define DLM_PROC_FLAGS_CLOSING 1
673#define DLM_PROC_FLAGS_COMPAT 2
674
675/* locks list is kept so we can remove all a process's locks when it
676 exits (or orphan those that are persistent) */
677
678struct dlm_user_proc {
679 dlm_lockspace_t *lockspace;
680 unsigned long flags; /* DLM_PROC_FLAGS */
681 struct list_head asts;
682 spinlock_t asts_spin;
683 struct list_head locks;
684 spinlock_t locks_spin;
David Teiglanda1bc86e2007-01-15 10:34:52 -0600685 struct list_head unlocking;
David Teigland597d0ca2006-07-12 16:44:04 -0500686 wait_queue_head_t wait;
687};
688
David Teiglande7fd4172006-01-18 09:30:29 +0000689static inline int dlm_locking_stopped(struct dlm_ls *ls)
690{
691 return !test_bit(LSFL_RUNNING, &ls->ls_flags);
692}
693
694static inline int dlm_recovery_stopped(struct dlm_ls *ls)
695{
David Teigland475f2302012-08-02 11:08:21 -0500696 return test_bit(LSFL_RECOVER_STOP, &ls->ls_flags);
David Teiglande7fd4172006-01-18 09:30:29 +0000697}
698
699static inline int dlm_no_directory(struct dlm_ls *ls)
700{
David Teigland48756472012-04-26 15:54:29 -0500701 return test_bit(LSFL_NODIR, &ls->ls_flags);
David Teiglande7fd4172006-01-18 09:30:29 +0000702}
703
Adrian Bunke0283982007-11-03 01:04:30 +0100704int dlm_netlink_init(void);
705void dlm_netlink_exit(void);
706void dlm_timeout_warn(struct dlm_lkb *lkb);
David Teigland24022112008-03-14 15:09:15 -0500707int dlm_plock_init(void);
708void dlm_plock_exit(void);
Adrian Bunke0283982007-11-03 01:04:30 +0100709
710#ifdef CONFIG_DLM_DEBUG
711int dlm_register_debugfs(void);
712void dlm_unregister_debugfs(void);
713int dlm_create_debug_file(struct dlm_ls *ls);
714void dlm_delete_debug_file(struct dlm_ls *ls);
715#else
716static inline int dlm_register_debugfs(void) { return 0; }
717static inline void dlm_unregister_debugfs(void) { }
718static inline int dlm_create_debug_file(struct dlm_ls *ls) { return 0; }
719static inline void dlm_delete_debug_file(struct dlm_ls *ls) { }
720#endif
721
David Teiglande7fd4172006-01-18 09:30:29 +0000722#endif /* __DLM_INTERNAL_DOT_H__ */
723