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e7fd4179 DT |
1 | /****************************************************************************** |
2 | ******************************************************************************* | |
3 | ** | |
4 | ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
ef0c2bb0 | 5 | ** Copyright (C) 2004-2007 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> |
e7fd4179 DT |
40 | #include <asm/uaccess.h> |
41 | ||
42 | #include <linux/dlm.h> | |
99fc6487 | 43 | #include "config.h" |
e7fd4179 | 44 | |
e7fd4179 DT |
45 | /* 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 | ||
51 | struct dlm_ls; | |
52 | struct dlm_lkb; | |
53 | struct dlm_rsb; | |
54 | struct dlm_member; | |
55 | struct dlm_lkbtable; | |
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; | |
102 | rwlock_t lock; | |
103 | }; | |
104 | ||
105 | struct dlm_rsbtable { | |
106 | struct list_head list; | |
107 | struct list_head toss; | |
108 | rwlock_t lock; | |
109 | }; | |
110 | ||
111 | struct 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 | ||
121 | struct 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 | ||
131 | struct dlm_recover { | |
132 | struct list_head list; | |
d44e0fc7 | 133 | int *nodeids; /* nodeids of all members */ |
e7fd4179 | 134 | int node_count; |
d44e0fc7 DT |
135 | int *new; /* nodeids of new members */ |
136 | int new_count; | |
e7fd4179 DT |
137 | uint64_t seq; |
138 | }; | |
139 | ||
140 | /* | |
141 | * Pass input args to second stage locking function. | |
142 | */ | |
143 | ||
144 | struct dlm_args { | |
145 | uint32_t flags; | |
e5dae548 DT |
146 | void (*astfn) (void *astparam); |
147 | void *astparam; | |
148 | void (*bastfn) (void *astparam, int mode); | |
e7fd4179 DT |
149 | int mode; |
150 | struct dlm_lksb *lksb; | |
d7db923e | 151 | unsigned long timeout; |
e7fd4179 DT |
152 | }; |
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 | ||
e7fd4179 DT |
200 | /* 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 | |
597d0cae | 210 | #define DLM_IFL_DEAD 0x00040000 |
ef0c2bb0 DT |
211 | #define DLM_IFL_OVERLAP_UNLOCK 0x00080000 |
212 | #define DLM_IFL_OVERLAP_CANCEL 0x00100000 | |
213 | #define DLM_IFL_ENDOFLIFE 0x00200000 | |
3ae1acf9 | 214 | #define DLM_IFL_WATCH_TIMEWARN 0x00400000 |
84d8cd69 | 215 | #define DLM_IFL_TIMEOUT_CANCEL 0x00800000 |
8b4021fa | 216 | #define DLM_IFL_DEADLOCK_CANCEL 0x01000000 |
597d0cae DT |
217 | #define DLM_IFL_USER 0x00000001 |
218 | #define DLM_IFL_ORPHAN 0x00000002 | |
e7fd4179 DT |
219 | |
220 | struct 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 */ | |
e7fd4179 | 237 | int8_t lkb_wait_type; /* type of reply waiting for */ |
ef0c2bb0 | 238 | int8_t lkb_wait_count; |
e7fd4179 DT |
239 | 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 */ | |
597d0cae | 246 | struct list_head lkb_ownqueue; /* list of locks for a process */ |
3ae1acf9 DT |
247 | struct list_head lkb_time_list; |
248 | unsigned long lkb_timestamp; | |
249 | unsigned long lkb_timeout_cs; | |
e7fd4179 | 250 | |
e7fd4179 DT |
251 | char *lkb_lvbptr; |
252 | struct dlm_lksb *lkb_lksb; /* caller's status block */ | |
e5dae548 DT |
253 | void (*lkb_astfn) (void *astparam); |
254 | void (*lkb_bastfn) (void *astparam, int mode); | |
d292c0cc DT |
255 | union { |
256 | void *lkb_astparam; /* caller's ast arg */ | |
257 | struct dlm_user_args *lkb_ua; | |
258 | }; | |
e7fd4179 DT |
259 | }; |
260 | ||
261 | ||
262 | struct dlm_rsb { | |
263 | struct dlm_ls *res_ls; /* the lockspace */ | |
264 | struct kref res_ref; | |
90135925 | 265 | struct mutex res_mutex; |
e7fd4179 DT |
266 | 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 | ||
295 | enum 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, | |
97a35d1e | 302 | RSB_LOCKS_PURGED, |
e7fd4179 DT |
303 | }; |
304 | ||
305 | static inline void rsb_set_flag(struct dlm_rsb *r, enum rsb_flags flag) | |
306 | { | |
307 | __set_bit(flag, &r->res_flags); | |
308 | } | |
309 | ||
310 | static inline void rsb_clear_flag(struct dlm_rsb *r, enum rsb_flags flag) | |
311 | { | |
312 | __clear_bit(flag, &r->res_flags); | |
313 | } | |
314 | ||
315 | static 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 | ||
38aa8b0c DT |
323 | #define DLM_HEADER_MAJOR 0x00030000 |
324 | #define DLM_HEADER_MINOR 0x00000000 | |
e7fd4179 DT |
325 | |
326 | #define DLM_MSG 1 | |
327 | #define DLM_RCOM 2 | |
328 | ||
329 | struct 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 | |
8499137d | 352 | #define DLM_MSG_PURGE 14 |
e7fd4179 DT |
353 | |
354 | struct 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 */ | |
e7fd4179 DT |
374 | 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 | ||
396 | struct 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 */ | |
38aa8b0c DT |
401 | uint64_t rc_seq; /* sender's ls_recover_seq */ |
402 | uint64_t rc_seq_reply; /* remote ls_recover_seq */ | |
e7fd4179 DT |
403 | char rc_buf[0]; |
404 | }; | |
405 | ||
eef7d739 AV |
406 | union dlm_packet { |
407 | struct dlm_header header; /* common to other two */ | |
408 | struct dlm_message message; | |
409 | struct dlm_rcom rcom; | |
410 | }; | |
411 | ||
e7fd4179 | 412 | struct rcom_config { |
93ff2971 AV |
413 | __le32 rf_lvblen; |
414 | __le32 rf_lsflags; | |
415 | __le64 rf_unused; | |
e7fd4179 DT |
416 | }; |
417 | ||
418 | struct rcom_lock { | |
163a1859 AV |
419 | __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; | |
e7fd4179 DT |
428 | int8_t rl_rqmode; |
429 | int8_t rl_grmode; | |
430 | int8_t rl_status; | |
431 | int8_t rl_asts; | |
163a1859 AV |
432 | __le16 rl_wait_type; |
433 | __le16 rl_namelen; | |
e7fd4179 DT |
434 | char rl_name[DLM_RESNAME_MAXLEN]; |
435 | char rl_lvb[0]; | |
436 | }; | |
437 | ||
438 | struct dlm_ls { | |
439 | struct list_head ls_list; /* list of lockspaces */ | |
597d0cae | 440 | dlm_lockspace_t *ls_local_handle; |
e7fd4179 DT |
441 | 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 | ||
90135925 | 457 | struct mutex ls_waiters_mutex; |
e7fd4179 DT |
458 | struct list_head ls_waiters; /* lkbs needing a reply */ |
459 | ||
ef0c2bb0 DT |
460 | struct mutex ls_orphans_mutex; |
461 | struct list_head ls_orphans; | |
462 | ||
3ae1acf9 DT |
463 | struct mutex ls_timeout_mutex; |
464 | struct list_head ls_timeout; | |
465 | ||
e7fd4179 DT |
466 | 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; | |
44f487a5 | 472 | gfp_t ls_allocation; |
e7fd4179 DT |
473 | |
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 | ||
5de6319b DT |
478 | struct dentry *ls_debug_rsb_dentry; /* debugfs */ |
479 | struct dentry *ls_debug_waiters_dentry; /* debugfs */ | |
ac90a255 | 480 | struct dentry *ls_debug_locks_dentry; /* debugfs */ |
e7fd4179 DT |
481 | |
482 | wait_queue_head_t ls_uevent_wait; /* user part of join/leave */ | |
483 | int ls_uevent_result; | |
8b0e7b2c DT |
484 | struct completion ls_members_done; |
485 | int ls_members_result; | |
e7fd4179 | 486 | |
597d0cae DT |
487 | struct miscdevice ls_device; |
488 | ||
e7fd4179 DT |
489 | /* recovery related */ |
490 | ||
491 | struct timer_list ls_timer; | |
492 | struct task_struct *ls_recoverd_task; | |
90135925 | 493 | struct mutex ls_recoverd_active; |
e7fd4179 | 494 | spinlock_t ls_recover_lock; |
3ae1acf9 | 495 | unsigned long ls_recover_begin; /* jiffies timestamp */ |
e7fd4179 DT |
496 | 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 */ | |
c36258b5 | 500 | struct rw_semaphore ls_recv_active; /* block dlm_recv */ |
e7fd4179 | 501 | struct list_head ls_requestqueue;/* queue remote requests */ |
90135925 | 502 | struct mutex ls_requestqueue_mutex; |
4007685c | 503 | struct dlm_rcom *ls_recover_buf; |
faa0f267 | 504 | int ls_recover_nodeid; /* for debugging */ |
4a99c3d9 | 505 | uint64_t ls_rcom_seq; |
98f176fb | 506 | spinlock_t ls_rcom_spin; |
e7fd4179 DT |
507 | 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; | |
597d0cae | 511 | struct mutex ls_clear_proc_locks; |
e7fd4179 DT |
512 | |
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 | |
98f176fb DT |
524 | #define LSFL_RCOM_WAIT 4 |
525 | #define LSFL_UEVENT_WAIT 5 | |
3ae1acf9 | 526 | #define LSFL_TIMEWARN 6 |
e7fd4179 | 527 | |
597d0cae DT |
528 | /* 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 | ||
531 | struct 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; | |
d7db923e | 544 | uint64_t xid; |
597d0cae DT |
545 | }; |
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 | ||
553 | struct 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; | |
a1bc86e6 | 560 | struct list_head unlocking; |
597d0cae DT |
561 | wait_queue_head_t wait; |
562 | }; | |
563 | ||
e7fd4179 DT |
564 | static inline int dlm_locking_stopped(struct dlm_ls *ls) |
565 | { | |
566 | return !test_bit(LSFL_RUNNING, &ls->ls_flags); | |
567 | } | |
568 | ||
569 | static inline int dlm_recovery_stopped(struct dlm_ls *ls) | |
570 | { | |
571 | return test_bit(LSFL_RECOVERY_STOP, &ls->ls_flags); | |
572 | } | |
573 | ||
574 | static inline int dlm_no_directory(struct dlm_ls *ls) | |
575 | { | |
576 | return (ls->ls_exflags & DLM_LSFL_NODIR) ? 1 : 0; | |
577 | } | |
578 | ||
e028398d AB |
579 | int dlm_netlink_init(void); |
580 | void dlm_netlink_exit(void); | |
581 | void dlm_timeout_warn(struct dlm_lkb *lkb); | |
2402211a DT |
582 | int dlm_plock_init(void); |
583 | void dlm_plock_exit(void); | |
e028398d AB |
584 | |
585 | #ifdef CONFIG_DLM_DEBUG | |
586 | int dlm_register_debugfs(void); | |
587 | void dlm_unregister_debugfs(void); | |
588 | int dlm_create_debug_file(struct dlm_ls *ls); | |
589 | void dlm_delete_debug_file(struct dlm_ls *ls); | |
590 | #else | |
591 | static inline int dlm_register_debugfs(void) { return 0; } | |
592 | static inline void dlm_unregister_debugfs(void) { } | |
593 | static inline int dlm_create_debug_file(struct dlm_ls *ls) { return 0; } | |
594 | static inline void dlm_delete_debug_file(struct dlm_ls *ls) { } | |
595 | #endif | |
596 | ||
e7fd4179 DT |
597 | #endif /* __DLM_INTERNAL_DOT_H__ */ |
598 |