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e7fd4179 DT |
1 | /****************************************************************************** |
2 | ******************************************************************************* | |
3 | ** | |
4 | ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
7fe2b319 | 5 | ** Copyright (C) 2004-2010 Red Hat, Inc. All rights reserved. |
e7fd4179 DT |
6 | ** |
7 | ** This copyrighted material is made available to anyone wishing to use, | |
8 | ** modify, copy, or redistribute it subject to the terms and conditions | |
9 | ** of the GNU General Public License v.2. | |
10 | ** | |
11 | ******************************************************************************* | |
12 | ******************************************************************************/ | |
13 | ||
14 | #ifndef __DLM_INTERNAL_DOT_H__ | |
15 | #define __DLM_INTERNAL_DOT_H__ | |
16 | ||
17 | /* | |
18 | * This is the main header file to be included in each DLM source file. | |
19 | */ | |
20 | ||
21 | #include <linux/module.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/sched.h> | |
24 | #include <linux/types.h> | |
25 | #include <linux/ctype.h> | |
26 | #include <linux/spinlock.h> | |
27 | #include <linux/vmalloc.h> | |
28 | #include <linux/list.h> | |
29 | #include <linux/errno.h> | |
30 | #include <linux/random.h> | |
31 | #include <linux/delay.h> | |
32 | #include <linux/socket.h> | |
33 | #include <linux/kthread.h> | |
34 | #include <linux/kobject.h> | |
35 | #include <linux/kref.h> | |
36 | #include <linux/kernel.h> | |
37 | #include <linux/jhash.h> | |
597d0cae | 38 | #include <linux/miscdevice.h> |
90135925 | 39 | #include <linux/mutex.h> |
3d6aa675 | 40 | #include <linux/idr.h> |
e7fd4179 DT |
41 | #include <asm/uaccess.h> |
42 | ||
43 | #include <linux/dlm.h> | |
99fc6487 | 44 | #include "config.h" |
e7fd4179 | 45 | |
e7fd4179 DT |
46 | /* Size of the temp buffer midcomms allocates on the stack. |
47 | We try to make this large enough so most messages fit. | |
48 | FIXME: should sctp make this unnecessary? */ | |
49 | ||
50 | #define DLM_INBUF_LEN 148 | |
51 | ||
52 | struct dlm_ls; | |
53 | struct dlm_lkb; | |
54 | struct dlm_rsb; | |
55 | struct dlm_member; | |
e7fd4179 DT |
56 | struct dlm_rsbtable; |
57 | struct dlm_dirtable; | |
58 | struct dlm_direntry; | |
59 | struct dlm_recover; | |
60 | struct dlm_header; | |
61 | struct dlm_message; | |
62 | struct dlm_rcom; | |
63 | struct dlm_mhandle; | |
64 | ||
65 | #define log_print(fmt, args...) \ | |
66 | printk(KERN_ERR "dlm: "fmt"\n" , ##args) | |
67 | #define log_error(ls, fmt, args...) \ | |
68 | printk(KERN_ERR "dlm: %s: " fmt "\n", (ls)->ls_name , ##args) | |
69 | ||
99fc6487 DT |
70 | #define log_debug(ls, fmt, args...) \ |
71 | do { \ | |
72 | if (dlm_config.ci_log_debug) \ | |
73 | printk(KERN_DEBUG "dlm: %s: " fmt "\n", \ | |
74 | (ls)->ls_name , ##args); \ | |
75 | } while (0) | |
e7fd4179 DT |
76 | |
77 | #define DLM_ASSERT(x, do) \ | |
78 | { \ | |
79 | if (!(x)) \ | |
80 | { \ | |
81 | printk(KERN_ERR "\nDLM: Assertion failed on line %d of file %s\n" \ | |
82 | "DLM: assertion: \"%s\"\n" \ | |
83 | "DLM: time = %lu\n", \ | |
84 | __LINE__, __FILE__, #x, jiffies); \ | |
85 | {do} \ | |
86 | printk("\n"); \ | |
87 | BUG(); \ | |
88 | panic("DLM: Record message above and reboot.\n"); \ | |
89 | } \ | |
90 | } | |
91 | ||
92 | ||
93 | struct dlm_direntry { | |
94 | struct list_head list; | |
95 | uint32_t master_nodeid; | |
96 | uint16_t length; | |
97 | char name[1]; | |
98 | }; | |
99 | ||
100 | struct dlm_dirtable { | |
101 | struct list_head list; | |
305a47b1 | 102 | spinlock_t lock; |
e7fd4179 DT |
103 | }; |
104 | ||
105 | struct dlm_rsbtable { | |
106 | struct list_head list; | |
107 | struct list_head toss; | |
c7be761a | 108 | spinlock_t lock; |
e7fd4179 DT |
109 | }; |
110 | ||
e7fd4179 DT |
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 | }; | |
121 | ||
122 | /* | |
123 | * Save and manage recovery state for a lockspace. | |
124 | */ | |
125 | ||
126 | struct dlm_recover { | |
127 | struct list_head list; | |
d44e0fc7 | 128 | int *nodeids; /* nodeids of all members */ |
e7fd4179 | 129 | int node_count; |
d44e0fc7 DT |
130 | int *new; /* nodeids of new members */ |
131 | int new_count; | |
e7fd4179 DT |
132 | uint64_t seq; |
133 | }; | |
134 | ||
135 | /* | |
136 | * Pass input args to second stage locking function. | |
137 | */ | |
138 | ||
139 | struct dlm_args { | |
140 | uint32_t flags; | |
e5dae548 DT |
141 | void (*astfn) (void *astparam); |
142 | void *astparam; | |
143 | void (*bastfn) (void *astparam, int mode); | |
e7fd4179 DT |
144 | int mode; |
145 | struct dlm_lksb *lksb; | |
d7db923e | 146 | unsigned long timeout; |
e7fd4179 DT |
147 | }; |
148 | ||
149 | ||
150 | /* | |
151 | * Lock block | |
152 | * | |
153 | * A lock can be one of three types: | |
154 | * | |
155 | * local copy lock is mastered locally | |
156 | * (lkb_nodeid is zero and DLM_LKF_MSTCPY is not set) | |
157 | * process copy lock is mastered on a remote node | |
158 | * (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is not set) | |
159 | * master copy master node's copy of a lock owned by remote node | |
160 | * (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is set) | |
161 | * | |
162 | * lkb_exflags: a copy of the most recent flags arg provided to dlm_lock or | |
163 | * dlm_unlock. The dlm does not modify these or use any private flags in | |
164 | * this field; it only contains DLM_LKF_ flags from dlm.h. These flags | |
165 | * are sent as-is to the remote master when the lock is remote. | |
166 | * | |
167 | * lkb_flags: internal dlm flags (DLM_IFL_ prefix) from dlm_internal.h. | |
168 | * Some internal flags are shared between the master and process nodes; | |
169 | * these shared flags are kept in the lower two bytes. One of these | |
170 | * flags set on the master copy will be propagated to the process copy | |
171 | * and v.v. Other internal flags are private to the master or process | |
172 | * node (e.g. DLM_IFL_MSTCPY). These are kept in the high two bytes. | |
173 | * | |
174 | * lkb_sbflags: status block flags. These flags are copied directly into | |
175 | * the caller's lksb.sb_flags prior to the dlm_lock/dlm_unlock completion | |
176 | * ast. All defined in dlm.h with DLM_SBF_ prefix. | |
177 | * | |
178 | * lkb_status: the lock status indicates which rsb queue the lock is | |
179 | * on, grant, convert, or wait. DLM_LKSTS_ WAITING/GRANTED/CONVERT | |
180 | * | |
181 | * lkb_wait_type: the dlm message type (DLM_MSG_ prefix) for which a | |
182 | * reply is needed. Only set when the lkb is on the lockspace waiters | |
183 | * list awaiting a reply from a remote node. | |
184 | * | |
185 | * lkb_nodeid: when the lkb is a local copy, nodeid is 0; when the lkb | |
186 | * is a master copy, nodeid specifies the remote lock holder, when the | |
187 | * lkb is a process copy, the nodeid specifies the lock master. | |
188 | */ | |
189 | ||
e7fd4179 DT |
190 | /* lkb_status */ |
191 | ||
192 | #define DLM_LKSTS_WAITING 1 | |
193 | #define DLM_LKSTS_GRANTED 2 | |
194 | #define DLM_LKSTS_CONVERT 3 | |
195 | ||
196 | /* lkb_flags */ | |
197 | ||
198 | #define DLM_IFL_MSTCPY 0x00010000 | |
199 | #define DLM_IFL_RESEND 0x00020000 | |
597d0cae | 200 | #define DLM_IFL_DEAD 0x00040000 |
ef0c2bb0 DT |
201 | #define DLM_IFL_OVERLAP_UNLOCK 0x00080000 |
202 | #define DLM_IFL_OVERLAP_CANCEL 0x00100000 | |
203 | #define DLM_IFL_ENDOFLIFE 0x00200000 | |
3ae1acf9 | 204 | #define DLM_IFL_WATCH_TIMEWARN 0x00400000 |
84d8cd69 | 205 | #define DLM_IFL_TIMEOUT_CANCEL 0x00800000 |
8b4021fa | 206 | #define DLM_IFL_DEADLOCK_CANCEL 0x01000000 |
2a7ce0ed | 207 | #define DLM_IFL_STUB_MS 0x02000000 /* magic number for m_flags */ |
597d0cae DT |
208 | #define DLM_IFL_USER 0x00000001 |
209 | #define DLM_IFL_ORPHAN 0x00000002 | |
e7fd4179 | 210 | |
8304d6f2 DT |
211 | #define DLM_CALLBACKS_SIZE 6 |
212 | ||
213 | #define DLM_CB_CAST 0x00000001 | |
214 | #define DLM_CB_BAST 0x00000002 | |
215 | #define DLM_CB_SKIP 0x00000004 | |
216 | ||
217 | struct dlm_callback { | |
218 | uint64_t seq; | |
219 | uint32_t flags; /* DLM_CBF_ */ | |
220 | int sb_status; /* copy to lksb status */ | |
221 | uint8_t sb_flags; /* copy to lksb flags */ | |
222 | int8_t mode; /* rq mode of bast, gr mode of cast */ | |
223 | }; | |
224 | ||
e7fd4179 DT |
225 | struct dlm_lkb { |
226 | struct dlm_rsb *lkb_resource; /* the rsb */ | |
227 | struct kref lkb_ref; | |
228 | int lkb_nodeid; /* copied from rsb */ | |
229 | int lkb_ownpid; /* pid of lock owner */ | |
230 | uint32_t lkb_id; /* our lock ID */ | |
231 | uint32_t lkb_remid; /* lock ID on remote partner */ | |
232 | uint32_t lkb_exflags; /* external flags from caller */ | |
233 | uint32_t lkb_sbflags; /* lksb flags */ | |
234 | uint32_t lkb_flags; /* internal flags */ | |
235 | uint32_t lkb_lvbseq; /* lvb sequence number */ | |
236 | ||
237 | int8_t lkb_status; /* granted, waiting, convert */ | |
238 | int8_t lkb_rqmode; /* requested lock mode */ | |
239 | int8_t lkb_grmode; /* granted lock mode */ | |
e7fd4179 | 240 | int8_t lkb_highbast; /* highest mode bast sent for */ |
7fe2b319 | 241 | |
e7fd4179 | 242 | int8_t lkb_wait_type; /* type of reply waiting for */ |
ef0c2bb0 | 243 | int8_t lkb_wait_count; |
c6ff669b | 244 | int lkb_wait_nodeid; /* for debugging */ |
e7fd4179 | 245 | |
e7fd4179 DT |
246 | struct list_head lkb_statequeue; /* rsb g/c/w list */ |
247 | struct list_head lkb_rsb_lookup; /* waiting for rsb lookup */ | |
248 | struct list_head lkb_wait_reply; /* waiting for remote reply */ | |
597d0cae | 249 | struct list_head lkb_ownqueue; /* list of locks for a process */ |
3ae1acf9 | 250 | struct list_head lkb_time_list; |
eeda418d | 251 | ktime_t lkb_timestamp; |
c6ff669b | 252 | ktime_t lkb_wait_time; |
3ae1acf9 | 253 | unsigned long lkb_timeout_cs; |
e7fd4179 | 254 | |
23e8e1aa DT |
255 | struct mutex lkb_cb_mutex; |
256 | struct work_struct lkb_cb_work; | |
257 | struct list_head lkb_cb_list; /* for ls_cb_delay or proc->asts */ | |
8304d6f2 DT |
258 | struct dlm_callback lkb_callbacks[DLM_CALLBACKS_SIZE]; |
259 | struct dlm_callback lkb_last_cast; | |
260 | struct dlm_callback lkb_last_bast; | |
261 | ktime_t lkb_last_cast_time; /* for debugging */ | |
262 | ktime_t lkb_last_bast_time; /* for debugging */ | |
263 | ||
e7fd4179 DT |
264 | char *lkb_lvbptr; |
265 | struct dlm_lksb *lkb_lksb; /* caller's status block */ | |
e5dae548 DT |
266 | void (*lkb_astfn) (void *astparam); |
267 | void (*lkb_bastfn) (void *astparam, int mode); | |
d292c0cc DT |
268 | union { |
269 | void *lkb_astparam; /* caller's ast arg */ | |
270 | struct dlm_user_args *lkb_ua; | |
271 | }; | |
e7fd4179 DT |
272 | }; |
273 | ||
274 | ||
275 | struct dlm_rsb { | |
276 | struct dlm_ls *res_ls; /* the lockspace */ | |
277 | struct kref res_ref; | |
90135925 | 278 | struct mutex res_mutex; |
e7fd4179 DT |
279 | unsigned long res_flags; |
280 | int res_length; /* length of rsb name */ | |
281 | int res_nodeid; | |
282 | uint32_t res_lvbseq; | |
283 | uint32_t res_hash; | |
284 | uint32_t res_bucket; /* rsbtbl */ | |
285 | unsigned long res_toss_time; | |
286 | uint32_t res_first_lkid; | |
287 | struct list_head res_lookup; /* lkbs waiting on first */ | |
288 | struct list_head res_hashchain; /* rsbtbl */ | |
289 | struct list_head res_grantqueue; | |
290 | struct list_head res_convertqueue; | |
291 | struct list_head res_waitqueue; | |
292 | ||
293 | struct list_head res_root_list; /* used for recovery */ | |
294 | struct list_head res_recover_list; /* used for recovery */ | |
295 | int res_recover_locks_count; | |
296 | ||
297 | char *res_lvbptr; | |
3881ac04 | 298 | char res_name[DLM_RESNAME_MAXLEN+1]; |
e7fd4179 DT |
299 | }; |
300 | ||
301 | /* find_rsb() flags */ | |
302 | ||
303 | #define R_MASTER 1 /* only return rsb if it's a master */ | |
304 | #define R_CREATE 2 /* create/add rsb if not found */ | |
305 | ||
306 | /* rsb_flags */ | |
307 | ||
308 | enum rsb_flags { | |
309 | RSB_MASTER_UNCERTAIN, | |
310 | RSB_VALNOTVALID, | |
311 | RSB_VALNOTVALID_PREV, | |
312 | RSB_NEW_MASTER, | |
313 | RSB_NEW_MASTER2, | |
314 | RSB_RECOVER_CONVERT, | |
97a35d1e | 315 | RSB_LOCKS_PURGED, |
e7fd4179 DT |
316 | }; |
317 | ||
318 | static inline void rsb_set_flag(struct dlm_rsb *r, enum rsb_flags flag) | |
319 | { | |
320 | __set_bit(flag, &r->res_flags); | |
321 | } | |
322 | ||
323 | static inline void rsb_clear_flag(struct dlm_rsb *r, enum rsb_flags flag) | |
324 | { | |
325 | __clear_bit(flag, &r->res_flags); | |
326 | } | |
327 | ||
328 | static inline int rsb_flag(struct dlm_rsb *r, enum rsb_flags flag) | |
329 | { | |
330 | return test_bit(flag, &r->res_flags); | |
331 | } | |
332 | ||
333 | ||
334 | /* dlm_header is first element of all structs sent between nodes */ | |
335 | ||
38aa8b0c DT |
336 | #define DLM_HEADER_MAJOR 0x00030000 |
337 | #define DLM_HEADER_MINOR 0x00000000 | |
e7fd4179 DT |
338 | |
339 | #define DLM_MSG 1 | |
340 | #define DLM_RCOM 2 | |
341 | ||
342 | struct dlm_header { | |
343 | uint32_t h_version; | |
344 | uint32_t h_lockspace; | |
345 | uint32_t h_nodeid; /* nodeid of sender */ | |
346 | uint16_t h_length; | |
347 | uint8_t h_cmd; /* DLM_MSG, DLM_RCOM */ | |
348 | uint8_t h_pad; | |
349 | }; | |
350 | ||
351 | ||
352 | #define DLM_MSG_REQUEST 1 | |
353 | #define DLM_MSG_CONVERT 2 | |
354 | #define DLM_MSG_UNLOCK 3 | |
355 | #define DLM_MSG_CANCEL 4 | |
356 | #define DLM_MSG_REQUEST_REPLY 5 | |
357 | #define DLM_MSG_CONVERT_REPLY 6 | |
358 | #define DLM_MSG_UNLOCK_REPLY 7 | |
359 | #define DLM_MSG_CANCEL_REPLY 8 | |
360 | #define DLM_MSG_GRANT 9 | |
361 | #define DLM_MSG_BAST 10 | |
362 | #define DLM_MSG_LOOKUP 11 | |
363 | #define DLM_MSG_REMOVE 12 | |
364 | #define DLM_MSG_LOOKUP_REPLY 13 | |
8499137d | 365 | #define DLM_MSG_PURGE 14 |
e7fd4179 DT |
366 | |
367 | struct dlm_message { | |
368 | struct dlm_header m_header; | |
369 | uint32_t m_type; /* DLM_MSG_ */ | |
370 | uint32_t m_nodeid; | |
371 | uint32_t m_pid; | |
372 | uint32_t m_lkid; /* lkid on sender */ | |
373 | uint32_t m_remid; /* lkid on receiver */ | |
374 | uint32_t m_parent_lkid; | |
375 | uint32_t m_parent_remid; | |
376 | uint32_t m_exflags; | |
377 | uint32_t m_sbflags; | |
378 | uint32_t m_flags; | |
379 | uint32_t m_lvbseq; | |
380 | uint32_t m_hash; | |
381 | int m_status; | |
382 | int m_grmode; | |
383 | int m_rqmode; | |
384 | int m_bastmode; | |
385 | int m_asts; | |
386 | int m_result; /* 0 or -EXXX */ | |
e7fd4179 DT |
387 | char m_extra[0]; /* name or lvb */ |
388 | }; | |
389 | ||
390 | ||
391 | #define DLM_RS_NODES 0x00000001 | |
392 | #define DLM_RS_NODES_ALL 0x00000002 | |
393 | #define DLM_RS_DIR 0x00000004 | |
394 | #define DLM_RS_DIR_ALL 0x00000008 | |
395 | #define DLM_RS_LOCKS 0x00000010 | |
396 | #define DLM_RS_LOCKS_ALL 0x00000020 | |
397 | #define DLM_RS_DONE 0x00000040 | |
398 | #define DLM_RS_DONE_ALL 0x00000080 | |
399 | ||
400 | #define DLM_RCOM_STATUS 1 | |
401 | #define DLM_RCOM_NAMES 2 | |
402 | #define DLM_RCOM_LOOKUP 3 | |
403 | #define DLM_RCOM_LOCK 4 | |
404 | #define DLM_RCOM_STATUS_REPLY 5 | |
405 | #define DLM_RCOM_NAMES_REPLY 6 | |
406 | #define DLM_RCOM_LOOKUP_REPLY 7 | |
407 | #define DLM_RCOM_LOCK_REPLY 8 | |
408 | ||
409 | struct dlm_rcom { | |
410 | struct dlm_header rc_header; | |
411 | uint32_t rc_type; /* DLM_RCOM_ */ | |
412 | int rc_result; /* multi-purpose */ | |
413 | uint64_t rc_id; /* match reply with request */ | |
38aa8b0c DT |
414 | uint64_t rc_seq; /* sender's ls_recover_seq */ |
415 | uint64_t rc_seq_reply; /* remote ls_recover_seq */ | |
e7fd4179 DT |
416 | char rc_buf[0]; |
417 | }; | |
418 | ||
eef7d739 AV |
419 | union dlm_packet { |
420 | struct dlm_header header; /* common to other two */ | |
421 | struct dlm_message message; | |
422 | struct dlm_rcom rcom; | |
423 | }; | |
424 | ||
e7fd4179 | 425 | struct rcom_config { |
93ff2971 AV |
426 | __le32 rf_lvblen; |
427 | __le32 rf_lsflags; | |
428 | __le64 rf_unused; | |
e7fd4179 DT |
429 | }; |
430 | ||
431 | struct rcom_lock { | |
163a1859 AV |
432 | __le32 rl_ownpid; |
433 | __le32 rl_lkid; | |
434 | __le32 rl_remid; | |
435 | __le32 rl_parent_lkid; | |
436 | __le32 rl_parent_remid; | |
437 | __le32 rl_exflags; | |
438 | __le32 rl_flags; | |
439 | __le32 rl_lvbseq; | |
440 | __le32 rl_result; | |
e7fd4179 DT |
441 | int8_t rl_rqmode; |
442 | int8_t rl_grmode; | |
443 | int8_t rl_status; | |
444 | int8_t rl_asts; | |
163a1859 AV |
445 | __le16 rl_wait_type; |
446 | __le16 rl_namelen; | |
e7fd4179 DT |
447 | char rl_name[DLM_RESNAME_MAXLEN]; |
448 | char rl_lvb[0]; | |
449 | }; | |
450 | ||
451 | struct dlm_ls { | |
452 | struct list_head ls_list; /* list of lockspaces */ | |
597d0cae | 453 | dlm_lockspace_t *ls_local_handle; |
e7fd4179 DT |
454 | uint32_t ls_global_id; /* global unique lockspace ID */ |
455 | uint32_t ls_exflags; | |
456 | int ls_lvblen; | |
0f8e0d9a DT |
457 | int ls_count; /* refcount of processes in |
458 | the dlm using this ls */ | |
459 | int ls_create_count; /* create/release refcount */ | |
e7fd4179 | 460 | unsigned long ls_flags; /* LSFL_ */ |
c1dcf65f | 461 | unsigned long ls_scan_time; |
e7fd4179 DT |
462 | struct kobject ls_kobj; |
463 | ||
3d6aa675 DT |
464 | struct idr ls_lkbidr; |
465 | spinlock_t ls_lkbidr_spin; | |
466 | ||
e7fd4179 DT |
467 | struct dlm_rsbtable *ls_rsbtbl; |
468 | uint32_t ls_rsbtbl_size; | |
469 | ||
e7fd4179 DT |
470 | struct dlm_dirtable *ls_dirtbl; |
471 | uint32_t ls_dirtbl_size; | |
472 | ||
90135925 | 473 | struct mutex ls_waiters_mutex; |
e7fd4179 DT |
474 | struct list_head ls_waiters; /* lkbs needing a reply */ |
475 | ||
ef0c2bb0 DT |
476 | struct mutex ls_orphans_mutex; |
477 | struct list_head ls_orphans; | |
478 | ||
3ae1acf9 DT |
479 | struct mutex ls_timeout_mutex; |
480 | struct list_head ls_timeout; | |
481 | ||
3881ac04 DT |
482 | spinlock_t ls_new_rsb_spin; |
483 | int ls_new_rsb_count; | |
484 | struct list_head ls_new_rsb; /* new rsb structs */ | |
485 | ||
e7fd4179 DT |
486 | struct list_head ls_nodes; /* current nodes in ls */ |
487 | struct list_head ls_nodes_gone; /* dead node list, recovery */ | |
488 | int ls_num_nodes; /* number of nodes in ls */ | |
489 | int ls_low_nodeid; | |
490 | int ls_total_weight; | |
491 | int *ls_node_array; | |
492 | ||
493 | struct dlm_rsb ls_stub_rsb; /* for returning errors */ | |
494 | struct dlm_lkb ls_stub_lkb; /* for returning errors */ | |
495 | struct dlm_message ls_stub_ms; /* for faking a reply */ | |
496 | ||
5de6319b DT |
497 | struct dentry *ls_debug_rsb_dentry; /* debugfs */ |
498 | struct dentry *ls_debug_waiters_dentry; /* debugfs */ | |
ac90a255 | 499 | struct dentry *ls_debug_locks_dentry; /* debugfs */ |
d022509d | 500 | struct dentry *ls_debug_all_dentry; /* debugfs */ |
e7fd4179 DT |
501 | |
502 | wait_queue_head_t ls_uevent_wait; /* user part of join/leave */ | |
503 | int ls_uevent_result; | |
8b0e7b2c DT |
504 | struct completion ls_members_done; |
505 | int ls_members_result; | |
e7fd4179 | 506 | |
597d0cae DT |
507 | struct miscdevice ls_device; |
508 | ||
23e8e1aa DT |
509 | struct workqueue_struct *ls_callback_wq; |
510 | ||
e7fd4179 DT |
511 | /* recovery related */ |
512 | ||
23e8e1aa DT |
513 | struct mutex ls_cb_mutex; |
514 | struct list_head ls_cb_delay; /* save for queue_work later */ | |
e7fd4179 DT |
515 | struct timer_list ls_timer; |
516 | struct task_struct *ls_recoverd_task; | |
90135925 | 517 | struct mutex ls_recoverd_active; |
e7fd4179 | 518 | spinlock_t ls_recover_lock; |
3ae1acf9 | 519 | unsigned long ls_recover_begin; /* jiffies timestamp */ |
e7fd4179 DT |
520 | uint32_t ls_recover_status; /* DLM_RS_ */ |
521 | uint64_t ls_recover_seq; | |
522 | struct dlm_recover *ls_recover_args; | |
523 | struct rw_semaphore ls_in_recovery; /* block local requests */ | |
c36258b5 | 524 | struct rw_semaphore ls_recv_active; /* block dlm_recv */ |
e7fd4179 | 525 | struct list_head ls_requestqueue;/* queue remote requests */ |
90135925 | 526 | struct mutex ls_requestqueue_mutex; |
4007685c | 527 | struct dlm_rcom *ls_recover_buf; |
faa0f267 | 528 | int ls_recover_nodeid; /* for debugging */ |
4a99c3d9 | 529 | uint64_t ls_rcom_seq; |
98f176fb | 530 | spinlock_t ls_rcom_spin; |
e7fd4179 DT |
531 | struct list_head ls_recover_list; |
532 | spinlock_t ls_recover_list_lock; | |
533 | int ls_recover_list_count; | |
534 | wait_queue_head_t ls_wait_general; | |
597d0cae | 535 | struct mutex ls_clear_proc_locks; |
e7fd4179 DT |
536 | |
537 | struct list_head ls_root_list; /* root resources */ | |
538 | struct rw_semaphore ls_root_sem; /* protect root_list */ | |
539 | ||
540 | int ls_namelen; | |
541 | char ls_name[1]; | |
542 | }; | |
543 | ||
544 | #define LSFL_WORK 0 | |
545 | #define LSFL_RUNNING 1 | |
546 | #define LSFL_RECOVERY_STOP 2 | |
547 | #define LSFL_RCOM_READY 3 | |
98f176fb DT |
548 | #define LSFL_RCOM_WAIT 4 |
549 | #define LSFL_UEVENT_WAIT 5 | |
3ae1acf9 | 550 | #define LSFL_TIMEWARN 6 |
23e8e1aa | 551 | #define LSFL_CB_DELAY 7 |
e7fd4179 | 552 | |
597d0cae DT |
553 | /* much of this is just saving user space pointers associated with the |
554 | lock that we pass back to the user lib with an ast */ | |
555 | ||
556 | struct dlm_user_args { | |
557 | struct dlm_user_proc *proc; /* each process that opens the lockspace | |
558 | device has private data | |
559 | (dlm_user_proc) on the struct file, | |
560 | the process's locks point back to it*/ | |
561 | struct dlm_lksb lksb; | |
597d0cae DT |
562 | struct dlm_lksb __user *user_lksb; |
563 | void __user *castparam; | |
564 | void __user *castaddr; | |
565 | void __user *bastparam; | |
566 | void __user *bastaddr; | |
d7db923e | 567 | uint64_t xid; |
597d0cae DT |
568 | }; |
569 | ||
570 | #define DLM_PROC_FLAGS_CLOSING 1 | |
571 | #define DLM_PROC_FLAGS_COMPAT 2 | |
572 | ||
573 | /* locks list is kept so we can remove all a process's locks when it | |
574 | exits (or orphan those that are persistent) */ | |
575 | ||
576 | struct dlm_user_proc { | |
577 | dlm_lockspace_t *lockspace; | |
578 | unsigned long flags; /* DLM_PROC_FLAGS */ | |
579 | struct list_head asts; | |
580 | spinlock_t asts_spin; | |
581 | struct list_head locks; | |
582 | spinlock_t locks_spin; | |
a1bc86e6 | 583 | struct list_head unlocking; |
597d0cae DT |
584 | wait_queue_head_t wait; |
585 | }; | |
586 | ||
e7fd4179 DT |
587 | static inline int dlm_locking_stopped(struct dlm_ls *ls) |
588 | { | |
589 | return !test_bit(LSFL_RUNNING, &ls->ls_flags); | |
590 | } | |
591 | ||
592 | static inline int dlm_recovery_stopped(struct dlm_ls *ls) | |
593 | { | |
594 | return test_bit(LSFL_RECOVERY_STOP, &ls->ls_flags); | |
595 | } | |
596 | ||
597 | static inline int dlm_no_directory(struct dlm_ls *ls) | |
598 | { | |
599 | return (ls->ls_exflags & DLM_LSFL_NODIR) ? 1 : 0; | |
600 | } | |
601 | ||
e028398d AB |
602 | int dlm_netlink_init(void); |
603 | void dlm_netlink_exit(void); | |
604 | void dlm_timeout_warn(struct dlm_lkb *lkb); | |
2402211a DT |
605 | int dlm_plock_init(void); |
606 | void dlm_plock_exit(void); | |
e028398d AB |
607 | |
608 | #ifdef CONFIG_DLM_DEBUG | |
609 | int dlm_register_debugfs(void); | |
610 | void dlm_unregister_debugfs(void); | |
611 | int dlm_create_debug_file(struct dlm_ls *ls); | |
612 | void dlm_delete_debug_file(struct dlm_ls *ls); | |
613 | #else | |
614 | static inline int dlm_register_debugfs(void) { return 0; } | |
615 | static inline void dlm_unregister_debugfs(void) { } | |
616 | static inline int dlm_create_debug_file(struct dlm_ls *ls) { return 0; } | |
617 | static inline void dlm_delete_debug_file(struct dlm_ls *ls) { } | |
618 | #endif | |
619 | ||
e7fd4179 DT |
620 | #endif /* __DLM_INTERNAL_DOT_H__ */ |
621 |