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e7fd4179 DT |
1 | /****************************************************************************** |
2 | ******************************************************************************* | |
3 | ** | |
4 | ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
60f98d18 | 5 | ** Copyright (C) 2004-2011 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> |
d6e24788 | 41 | #include <linux/ratelimit.h> |
e7fd4179 DT |
42 | #include <asm/uaccess.h> |
43 | ||
44 | #include <linux/dlm.h> | |
99fc6487 | 45 | #include "config.h" |
e7fd4179 | 46 | |
e7fd4179 DT |
47 | /* 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 | ||
53 | struct dlm_ls; | |
54 | struct dlm_lkb; | |
55 | struct dlm_rsb; | |
56 | struct dlm_member; | |
e7fd4179 | 57 | struct dlm_rsbtable; |
e7fd4179 DT |
58 | struct dlm_recover; |
59 | struct dlm_header; | |
60 | struct dlm_message; | |
61 | struct dlm_rcom; | |
62 | struct 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) | |
505ee528 | 68 | |
075f0177 | 69 | #define log_rinfo(ls, fmt, args...) \ |
505ee528 ZL |
70 | do { \ |
71 | if (dlm_config.ci_log_info) \ | |
72 | printk(KERN_INFO "dlm: %s: " fmt "\n", \ | |
73 | (ls)->ls_name, ##args); \ | |
74 | else if (dlm_config.ci_log_debug) \ | |
75 | printk(KERN_DEBUG "dlm: %s: " fmt "\n", \ | |
76 | (ls)->ls_name , ##args); \ | |
77 | } while (0) | |
e7fd4179 | 78 | |
99fc6487 DT |
79 | #define log_debug(ls, fmt, args...) \ |
80 | do { \ | |
81 | if (dlm_config.ci_log_debug) \ | |
82 | printk(KERN_DEBUG "dlm: %s: " fmt "\n", \ | |
83 | (ls)->ls_name , ##args); \ | |
84 | } while (0) | |
e7fd4179 | 85 | |
d6e24788 DT |
86 | #define log_limit(ls, fmt, args...) \ |
87 | do { \ | |
88 | if (dlm_config.ci_log_debug) \ | |
89 | printk_ratelimited(KERN_DEBUG "dlm: %s: " fmt "\n", \ | |
90 | (ls)->ls_name , ##args); \ | |
91 | } while (0) | |
92 | ||
e7fd4179 DT |
93 | #define DLM_ASSERT(x, do) \ |
94 | { \ | |
95 | if (!(x)) \ | |
96 | { \ | |
97 | printk(KERN_ERR "\nDLM: Assertion failed on line %d of file %s\n" \ | |
98 | "DLM: assertion: \"%s\"\n" \ | |
99 | "DLM: time = %lu\n", \ | |
100 | __LINE__, __FILE__, #x, jiffies); \ | |
101 | {do} \ | |
102 | printk("\n"); \ | |
103 | BUG(); \ | |
104 | panic("DLM: Record message above and reboot.\n"); \ | |
105 | } \ | |
106 | } | |
107 | ||
108 | ||
f1172283 DT |
109 | #define DLM_RTF_SHRINK 0x00000001 |
110 | ||
e7fd4179 | 111 | struct dlm_rsbtable { |
9beb3bf5 BP |
112 | struct rb_root keep; |
113 | struct rb_root toss; | |
c7be761a | 114 | spinlock_t lock; |
f1172283 | 115 | uint32_t flags; |
e7fd4179 DT |
116 | }; |
117 | ||
e7fd4179 DT |
118 | |
119 | /* | |
120 | * Lockspace member (per node in a ls) | |
121 | */ | |
122 | ||
123 | struct dlm_member { | |
124 | struct list_head list; | |
125 | int nodeid; | |
126 | int weight; | |
757a4271 DT |
127 | int slot; |
128 | int slot_prev; | |
60f98d18 | 129 | int comm_seq; |
757a4271 DT |
130 | uint32_t generation; |
131 | }; | |
132 | ||
e7fd4179 DT |
133 | /* |
134 | * Save and manage recovery state for a lockspace. | |
135 | */ | |
136 | ||
137 | struct dlm_recover { | |
138 | struct list_head list; | |
60f98d18 DT |
139 | struct dlm_config_node *nodes; |
140 | int nodes_count; | |
e7fd4179 DT |
141 | uint64_t seq; |
142 | }; | |
143 | ||
144 | /* | |
145 | * Pass input args to second stage locking function. | |
146 | */ | |
147 | ||
148 | struct dlm_args { | |
149 | uint32_t flags; | |
e5dae548 DT |
150 | void (*astfn) (void *astparam); |
151 | void *astparam; | |
152 | void (*bastfn) (void *astparam, int mode); | |
e7fd4179 DT |
153 | int mode; |
154 | struct dlm_lksb *lksb; | |
d7db923e | 155 | unsigned long timeout; |
e7fd4179 DT |
156 | }; |
157 | ||
158 | ||
159 | /* | |
160 | * Lock block | |
161 | * | |
162 | * A lock can be one of three types: | |
163 | * | |
164 | * local copy lock is mastered locally | |
165 | * (lkb_nodeid is zero and DLM_LKF_MSTCPY is not set) | |
166 | * process copy lock is mastered on a remote node | |
167 | * (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is not set) | |
168 | * master copy master node's copy of a lock owned by remote node | |
169 | * (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is set) | |
170 | * | |
171 | * lkb_exflags: a copy of the most recent flags arg provided to dlm_lock or | |
172 | * dlm_unlock. The dlm does not modify these or use any private flags in | |
173 | * this field; it only contains DLM_LKF_ flags from dlm.h. These flags | |
174 | * are sent as-is to the remote master when the lock is remote. | |
175 | * | |
176 | * lkb_flags: internal dlm flags (DLM_IFL_ prefix) from dlm_internal.h. | |
177 | * Some internal flags are shared between the master and process nodes; | |
178 | * these shared flags are kept in the lower two bytes. One of these | |
179 | * flags set on the master copy will be propagated to the process copy | |
180 | * and v.v. Other internal flags are private to the master or process | |
181 | * node (e.g. DLM_IFL_MSTCPY). These are kept in the high two bytes. | |
182 | * | |
183 | * lkb_sbflags: status block flags. These flags are copied directly into | |
184 | * the caller's lksb.sb_flags prior to the dlm_lock/dlm_unlock completion | |
185 | * ast. All defined in dlm.h with DLM_SBF_ prefix. | |
186 | * | |
187 | * lkb_status: the lock status indicates which rsb queue the lock is | |
188 | * on, grant, convert, or wait. DLM_LKSTS_ WAITING/GRANTED/CONVERT | |
189 | * | |
190 | * lkb_wait_type: the dlm message type (DLM_MSG_ prefix) for which a | |
191 | * reply is needed. Only set when the lkb is on the lockspace waiters | |
192 | * list awaiting a reply from a remote node. | |
193 | * | |
194 | * lkb_nodeid: when the lkb is a local copy, nodeid is 0; when the lkb | |
195 | * is a master copy, nodeid specifies the remote lock holder, when the | |
196 | * lkb is a process copy, the nodeid specifies the lock master. | |
197 | */ | |
198 | ||
e7fd4179 DT |
199 | /* lkb_status */ |
200 | ||
201 | #define DLM_LKSTS_WAITING 1 | |
202 | #define DLM_LKSTS_GRANTED 2 | |
203 | #define DLM_LKSTS_CONVERT 3 | |
204 | ||
205 | /* lkb_flags */ | |
206 | ||
207 | #define DLM_IFL_MSTCPY 0x00010000 | |
208 | #define DLM_IFL_RESEND 0x00020000 | |
597d0cae | 209 | #define DLM_IFL_DEAD 0x00040000 |
ef0c2bb0 DT |
210 | #define DLM_IFL_OVERLAP_UNLOCK 0x00080000 |
211 | #define DLM_IFL_OVERLAP_CANCEL 0x00100000 | |
212 | #define DLM_IFL_ENDOFLIFE 0x00200000 | |
3ae1acf9 | 213 | #define DLM_IFL_WATCH_TIMEWARN 0x00400000 |
84d8cd69 | 214 | #define DLM_IFL_TIMEOUT_CANCEL 0x00800000 |
8b4021fa | 215 | #define DLM_IFL_DEADLOCK_CANCEL 0x01000000 |
2a7ce0ed | 216 | #define DLM_IFL_STUB_MS 0x02000000 /* magic number for m_flags */ |
597d0cae DT |
217 | #define DLM_IFL_USER 0x00000001 |
218 | #define DLM_IFL_ORPHAN 0x00000002 | |
e7fd4179 | 219 | |
8304d6f2 DT |
220 | #define DLM_CALLBACKS_SIZE 6 |
221 | ||
222 | #define DLM_CB_CAST 0x00000001 | |
223 | #define DLM_CB_BAST 0x00000002 | |
224 | #define DLM_CB_SKIP 0x00000004 | |
225 | ||
226 | struct dlm_callback { | |
227 | uint64_t seq; | |
228 | uint32_t flags; /* DLM_CBF_ */ | |
229 | int sb_status; /* copy to lksb status */ | |
230 | uint8_t sb_flags; /* copy to lksb flags */ | |
231 | int8_t mode; /* rq mode of bast, gr mode of cast */ | |
232 | }; | |
233 | ||
e7fd4179 DT |
234 | struct dlm_lkb { |
235 | struct dlm_rsb *lkb_resource; /* the rsb */ | |
236 | struct kref lkb_ref; | |
237 | int lkb_nodeid; /* copied from rsb */ | |
238 | int lkb_ownpid; /* pid of lock owner */ | |
239 | uint32_t lkb_id; /* our lock ID */ | |
240 | uint32_t lkb_remid; /* lock ID on remote partner */ | |
241 | uint32_t lkb_exflags; /* external flags from caller */ | |
242 | uint32_t lkb_sbflags; /* lksb flags */ | |
243 | uint32_t lkb_flags; /* internal flags */ | |
244 | uint32_t lkb_lvbseq; /* lvb sequence number */ | |
245 | ||
246 | int8_t lkb_status; /* granted, waiting, convert */ | |
247 | int8_t lkb_rqmode; /* requested lock mode */ | |
248 | int8_t lkb_grmode; /* granted lock mode */ | |
e7fd4179 | 249 | int8_t lkb_highbast; /* highest mode bast sent for */ |
7fe2b319 | 250 | |
e7fd4179 | 251 | int8_t lkb_wait_type; /* type of reply waiting for */ |
ef0c2bb0 | 252 | int8_t lkb_wait_count; |
c6ff669b | 253 | int lkb_wait_nodeid; /* for debugging */ |
e7fd4179 | 254 | |
e7fd4179 DT |
255 | struct list_head lkb_statequeue; /* rsb g/c/w list */ |
256 | struct list_head lkb_rsb_lookup; /* waiting for rsb lookup */ | |
257 | struct list_head lkb_wait_reply; /* waiting for remote reply */ | |
597d0cae | 258 | struct list_head lkb_ownqueue; /* list of locks for a process */ |
3ae1acf9 | 259 | struct list_head lkb_time_list; |
eeda418d | 260 | ktime_t lkb_timestamp; |
c6ff669b | 261 | ktime_t lkb_wait_time; |
3ae1acf9 | 262 | unsigned long lkb_timeout_cs; |
e7fd4179 | 263 | |
23e8e1aa DT |
264 | struct mutex lkb_cb_mutex; |
265 | struct work_struct lkb_cb_work; | |
266 | struct list_head lkb_cb_list; /* for ls_cb_delay or proc->asts */ | |
8304d6f2 DT |
267 | struct dlm_callback lkb_callbacks[DLM_CALLBACKS_SIZE]; |
268 | struct dlm_callback lkb_last_cast; | |
269 | struct dlm_callback lkb_last_bast; | |
270 | ktime_t lkb_last_cast_time; /* for debugging */ | |
271 | ktime_t lkb_last_bast_time; /* for debugging */ | |
272 | ||
4875647a DT |
273 | uint64_t lkb_recover_seq; /* from ls_recover_seq */ |
274 | ||
e7fd4179 DT |
275 | char *lkb_lvbptr; |
276 | struct dlm_lksb *lkb_lksb; /* caller's status block */ | |
e5dae548 DT |
277 | void (*lkb_astfn) (void *astparam); |
278 | void (*lkb_bastfn) (void *astparam, int mode); | |
d292c0cc DT |
279 | union { |
280 | void *lkb_astparam; /* caller's ast arg */ | |
281 | struct dlm_user_args *lkb_ua; | |
282 | }; | |
e7fd4179 DT |
283 | }; |
284 | ||
c04fecb4 DT |
285 | /* |
286 | * res_master_nodeid is "normal": 0 is unset/invalid, non-zero is the real | |
287 | * nodeid, even when nodeid is our_nodeid. | |
288 | * | |
289 | * res_nodeid is "odd": -1 is unset/invalid, zero means our_nodeid, | |
290 | * greater than zero when another nodeid. | |
291 | * | |
292 | * (TODO: remove res_nodeid and only use res_master_nodeid) | |
293 | */ | |
e7fd4179 DT |
294 | |
295 | struct dlm_rsb { | |
296 | struct dlm_ls *res_ls; /* the lockspace */ | |
297 | struct kref res_ref; | |
90135925 | 298 | struct mutex res_mutex; |
e7fd4179 DT |
299 | unsigned long res_flags; |
300 | int res_length; /* length of rsb name */ | |
301 | int res_nodeid; | |
c04fecb4 DT |
302 | int res_master_nodeid; |
303 | int res_dir_nodeid; | |
1d7c484e | 304 | int res_id; /* for ls_recover_idr */ |
e7fd4179 DT |
305 | uint32_t res_lvbseq; |
306 | uint32_t res_hash; | |
307 | uint32_t res_bucket; /* rsbtbl */ | |
308 | unsigned long res_toss_time; | |
309 | uint32_t res_first_lkid; | |
310 | struct list_head res_lookup; /* lkbs waiting on first */ | |
9beb3bf5 BP |
311 | union { |
312 | struct list_head res_hashchain; | |
313 | struct rb_node res_hashnode; /* rsbtbl */ | |
314 | }; | |
e7fd4179 DT |
315 | struct list_head res_grantqueue; |
316 | struct list_head res_convertqueue; | |
317 | struct list_head res_waitqueue; | |
318 | ||
319 | struct list_head res_root_list; /* used for recovery */ | |
320 | struct list_head res_recover_list; /* used for recovery */ | |
321 | int res_recover_locks_count; | |
322 | ||
323 | char *res_lvbptr; | |
3881ac04 | 324 | char res_name[DLM_RESNAME_MAXLEN+1]; |
e7fd4179 DT |
325 | }; |
326 | ||
c04fecb4 DT |
327 | /* dlm_master_lookup() flags */ |
328 | ||
329 | #define DLM_LU_RECOVER_DIR 1 | |
330 | #define DLM_LU_RECOVER_MASTER 2 | |
331 | ||
332 | /* dlm_master_lookup() results */ | |
333 | ||
334 | #define DLM_LU_MATCH 1 | |
335 | #define DLM_LU_ADD 2 | |
336 | ||
e7fd4179 DT |
337 | /* find_rsb() flags */ |
338 | ||
c04fecb4 DT |
339 | #define R_REQUEST 0x00000001 |
340 | #define R_RECEIVE_REQUEST 0x00000002 | |
341 | #define R_RECEIVE_RECOVER 0x00000004 | |
e7fd4179 DT |
342 | |
343 | /* rsb_flags */ | |
344 | ||
345 | enum rsb_flags { | |
346 | RSB_MASTER_UNCERTAIN, | |
347 | RSB_VALNOTVALID, | |
348 | RSB_VALNOTVALID_PREV, | |
349 | RSB_NEW_MASTER, | |
350 | RSB_NEW_MASTER2, | |
351 | RSB_RECOVER_CONVERT, | |
4875647a | 352 | RSB_RECOVER_GRANT, |
da8c6663 | 353 | RSB_RECOVER_LVB_INVAL, |
e7fd4179 DT |
354 | }; |
355 | ||
356 | static inline void rsb_set_flag(struct dlm_rsb *r, enum rsb_flags flag) | |
357 | { | |
358 | __set_bit(flag, &r->res_flags); | |
359 | } | |
360 | ||
361 | static inline void rsb_clear_flag(struct dlm_rsb *r, enum rsb_flags flag) | |
362 | { | |
363 | __clear_bit(flag, &r->res_flags); | |
364 | } | |
365 | ||
366 | static inline int rsb_flag(struct dlm_rsb *r, enum rsb_flags flag) | |
367 | { | |
368 | return test_bit(flag, &r->res_flags); | |
369 | } | |
370 | ||
371 | ||
372 | /* dlm_header is first element of all structs sent between nodes */ | |
373 | ||
38aa8b0c | 374 | #define DLM_HEADER_MAJOR 0x00030000 |
757a4271 DT |
375 | #define DLM_HEADER_MINOR 0x00000001 |
376 | ||
377 | #define DLM_HEADER_SLOTS 0x00000001 | |
e7fd4179 DT |
378 | |
379 | #define DLM_MSG 1 | |
380 | #define DLM_RCOM 2 | |
381 | ||
382 | struct dlm_header { | |
383 | uint32_t h_version; | |
384 | uint32_t h_lockspace; | |
385 | uint32_t h_nodeid; /* nodeid of sender */ | |
386 | uint16_t h_length; | |
387 | uint8_t h_cmd; /* DLM_MSG, DLM_RCOM */ | |
388 | uint8_t h_pad; | |
389 | }; | |
390 | ||
391 | ||
392 | #define DLM_MSG_REQUEST 1 | |
393 | #define DLM_MSG_CONVERT 2 | |
394 | #define DLM_MSG_UNLOCK 3 | |
395 | #define DLM_MSG_CANCEL 4 | |
396 | #define DLM_MSG_REQUEST_REPLY 5 | |
397 | #define DLM_MSG_CONVERT_REPLY 6 | |
398 | #define DLM_MSG_UNLOCK_REPLY 7 | |
399 | #define DLM_MSG_CANCEL_REPLY 8 | |
400 | #define DLM_MSG_GRANT 9 | |
401 | #define DLM_MSG_BAST 10 | |
402 | #define DLM_MSG_LOOKUP 11 | |
403 | #define DLM_MSG_REMOVE 12 | |
404 | #define DLM_MSG_LOOKUP_REPLY 13 | |
8499137d | 405 | #define DLM_MSG_PURGE 14 |
e7fd4179 DT |
406 | |
407 | struct dlm_message { | |
408 | struct dlm_header m_header; | |
409 | uint32_t m_type; /* DLM_MSG_ */ | |
410 | uint32_t m_nodeid; | |
411 | uint32_t m_pid; | |
412 | uint32_t m_lkid; /* lkid on sender */ | |
413 | uint32_t m_remid; /* lkid on receiver */ | |
414 | uint32_t m_parent_lkid; | |
415 | uint32_t m_parent_remid; | |
416 | uint32_t m_exflags; | |
417 | uint32_t m_sbflags; | |
418 | uint32_t m_flags; | |
419 | uint32_t m_lvbseq; | |
420 | uint32_t m_hash; | |
421 | int m_status; | |
422 | int m_grmode; | |
423 | int m_rqmode; | |
424 | int m_bastmode; | |
425 | int m_asts; | |
426 | int m_result; /* 0 or -EXXX */ | |
e7fd4179 DT |
427 | char m_extra[0]; /* name or lvb */ |
428 | }; | |
429 | ||
430 | ||
431 | #define DLM_RS_NODES 0x00000001 | |
432 | #define DLM_RS_NODES_ALL 0x00000002 | |
433 | #define DLM_RS_DIR 0x00000004 | |
434 | #define DLM_RS_DIR_ALL 0x00000008 | |
435 | #define DLM_RS_LOCKS 0x00000010 | |
436 | #define DLM_RS_LOCKS_ALL 0x00000020 | |
437 | #define DLM_RS_DONE 0x00000040 | |
438 | #define DLM_RS_DONE_ALL 0x00000080 | |
439 | ||
440 | #define DLM_RCOM_STATUS 1 | |
441 | #define DLM_RCOM_NAMES 2 | |
442 | #define DLM_RCOM_LOOKUP 3 | |
443 | #define DLM_RCOM_LOCK 4 | |
444 | #define DLM_RCOM_STATUS_REPLY 5 | |
445 | #define DLM_RCOM_NAMES_REPLY 6 | |
446 | #define DLM_RCOM_LOOKUP_REPLY 7 | |
447 | #define DLM_RCOM_LOCK_REPLY 8 | |
448 | ||
449 | struct dlm_rcom { | |
450 | struct dlm_header rc_header; | |
451 | uint32_t rc_type; /* DLM_RCOM_ */ | |
452 | int rc_result; /* multi-purpose */ | |
453 | uint64_t rc_id; /* match reply with request */ | |
38aa8b0c DT |
454 | uint64_t rc_seq; /* sender's ls_recover_seq */ |
455 | uint64_t rc_seq_reply; /* remote ls_recover_seq */ | |
e7fd4179 DT |
456 | char rc_buf[0]; |
457 | }; | |
458 | ||
eef7d739 AV |
459 | union dlm_packet { |
460 | struct dlm_header header; /* common to other two */ | |
461 | struct dlm_message message; | |
462 | struct dlm_rcom rcom; | |
463 | }; | |
464 | ||
757a4271 DT |
465 | #define DLM_RSF_NEED_SLOTS 0x00000001 |
466 | ||
467 | /* RCOM_STATUS data */ | |
468 | struct rcom_status { | |
469 | __le32 rs_flags; | |
470 | __le32 rs_unused1; | |
471 | __le64 rs_unused2; | |
472 | }; | |
473 | ||
474 | /* RCOM_STATUS_REPLY data */ | |
e7fd4179 | 475 | struct rcom_config { |
93ff2971 AV |
476 | __le32 rf_lvblen; |
477 | __le32 rf_lsflags; | |
757a4271 DT |
478 | |
479 | /* DLM_HEADER_SLOTS adds: */ | |
480 | __le32 rf_flags; | |
481 | __le16 rf_our_slot; | |
482 | __le16 rf_num_slots; | |
483 | __le32 rf_generation; | |
484 | __le32 rf_unused1; | |
485 | __le64 rf_unused2; | |
486 | }; | |
487 | ||
488 | struct rcom_slot { | |
489 | __le32 ro_nodeid; | |
490 | __le16 ro_slot; | |
491 | __le16 ro_unused1; | |
492 | __le64 ro_unused2; | |
e7fd4179 DT |
493 | }; |
494 | ||
495 | struct rcom_lock { | |
163a1859 AV |
496 | __le32 rl_ownpid; |
497 | __le32 rl_lkid; | |
498 | __le32 rl_remid; | |
499 | __le32 rl_parent_lkid; | |
500 | __le32 rl_parent_remid; | |
501 | __le32 rl_exflags; | |
502 | __le32 rl_flags; | |
503 | __le32 rl_lvbseq; | |
504 | __le32 rl_result; | |
e7fd4179 DT |
505 | int8_t rl_rqmode; |
506 | int8_t rl_grmode; | |
507 | int8_t rl_status; | |
508 | int8_t rl_asts; | |
163a1859 AV |
509 | __le16 rl_wait_type; |
510 | __le16 rl_namelen; | |
e7fd4179 DT |
511 | char rl_name[DLM_RESNAME_MAXLEN]; |
512 | char rl_lvb[0]; | |
513 | }; | |
514 | ||
05c32f47 DT |
515 | /* |
516 | * The max number of resources per rsbtbl bucket that shrink will attempt | |
517 | * to remove in each iteration. | |
518 | */ | |
519 | ||
520 | #define DLM_REMOVE_NAMES_MAX 8 | |
521 | ||
e7fd4179 DT |
522 | struct dlm_ls { |
523 | struct list_head ls_list; /* list of lockspaces */ | |
597d0cae | 524 | dlm_lockspace_t *ls_local_handle; |
e7fd4179 | 525 | uint32_t ls_global_id; /* global unique lockspace ID */ |
757a4271 | 526 | uint32_t ls_generation; |
e7fd4179 DT |
527 | uint32_t ls_exflags; |
528 | int ls_lvblen; | |
0f8e0d9a DT |
529 | int ls_count; /* refcount of processes in |
530 | the dlm using this ls */ | |
531 | int ls_create_count; /* create/release refcount */ | |
e7fd4179 | 532 | unsigned long ls_flags; /* LSFL_ */ |
c1dcf65f | 533 | unsigned long ls_scan_time; |
e7fd4179 DT |
534 | struct kobject ls_kobj; |
535 | ||
3d6aa675 DT |
536 | struct idr ls_lkbidr; |
537 | spinlock_t ls_lkbidr_spin; | |
538 | ||
e7fd4179 DT |
539 | struct dlm_rsbtable *ls_rsbtbl; |
540 | uint32_t ls_rsbtbl_size; | |
541 | ||
90135925 | 542 | struct mutex ls_waiters_mutex; |
e7fd4179 DT |
543 | struct list_head ls_waiters; /* lkbs needing a reply */ |
544 | ||
ef0c2bb0 DT |
545 | struct mutex ls_orphans_mutex; |
546 | struct list_head ls_orphans; | |
547 | ||
3ae1acf9 DT |
548 | struct mutex ls_timeout_mutex; |
549 | struct list_head ls_timeout; | |
550 | ||
3881ac04 DT |
551 | spinlock_t ls_new_rsb_spin; |
552 | int ls_new_rsb_count; | |
553 | struct list_head ls_new_rsb; /* new rsb structs */ | |
554 | ||
05c32f47 DT |
555 | spinlock_t ls_remove_spin; |
556 | char ls_remove_name[DLM_RESNAME_MAXLEN+1]; | |
557 | char *ls_remove_names[DLM_REMOVE_NAMES_MAX]; | |
558 | int ls_remove_len; | |
559 | int ls_remove_lens[DLM_REMOVE_NAMES_MAX]; | |
560 | ||
e7fd4179 DT |
561 | struct list_head ls_nodes; /* current nodes in ls */ |
562 | struct list_head ls_nodes_gone; /* dead node list, recovery */ | |
563 | int ls_num_nodes; /* number of nodes in ls */ | |
564 | int ls_low_nodeid; | |
565 | int ls_total_weight; | |
566 | int *ls_node_array; | |
567 | ||
757a4271 DT |
568 | int ls_slot; |
569 | int ls_num_slots; | |
570 | int ls_slots_size; | |
571 | struct dlm_slot *ls_slots; | |
572 | ||
e7fd4179 DT |
573 | struct dlm_rsb ls_stub_rsb; /* for returning errors */ |
574 | struct dlm_lkb ls_stub_lkb; /* for returning errors */ | |
575 | struct dlm_message ls_stub_ms; /* for faking a reply */ | |
576 | ||
5de6319b DT |
577 | struct dentry *ls_debug_rsb_dentry; /* debugfs */ |
578 | struct dentry *ls_debug_waiters_dentry; /* debugfs */ | |
ac90a255 | 579 | struct dentry *ls_debug_locks_dentry; /* debugfs */ |
d022509d | 580 | struct dentry *ls_debug_all_dentry; /* debugfs */ |
c04fecb4 | 581 | struct dentry *ls_debug_toss_dentry; /* debugfs */ |
e7fd4179 DT |
582 | |
583 | wait_queue_head_t ls_uevent_wait; /* user part of join/leave */ | |
584 | int ls_uevent_result; | |
8b0e7b2c DT |
585 | struct completion ls_members_done; |
586 | int ls_members_result; | |
e7fd4179 | 587 | |
597d0cae DT |
588 | struct miscdevice ls_device; |
589 | ||
23e8e1aa DT |
590 | struct workqueue_struct *ls_callback_wq; |
591 | ||
e7fd4179 DT |
592 | /* recovery related */ |
593 | ||
23e8e1aa DT |
594 | struct mutex ls_cb_mutex; |
595 | struct list_head ls_cb_delay; /* save for queue_work later */ | |
e7fd4179 DT |
596 | struct timer_list ls_timer; |
597 | struct task_struct *ls_recoverd_task; | |
90135925 | 598 | struct mutex ls_recoverd_active; |
e7fd4179 | 599 | spinlock_t ls_recover_lock; |
3ae1acf9 | 600 | unsigned long ls_recover_begin; /* jiffies timestamp */ |
e7fd4179 DT |
601 | uint32_t ls_recover_status; /* DLM_RS_ */ |
602 | uint64_t ls_recover_seq; | |
603 | struct dlm_recover *ls_recover_args; | |
604 | struct rw_semaphore ls_in_recovery; /* block local requests */ | |
c36258b5 | 605 | struct rw_semaphore ls_recv_active; /* block dlm_recv */ |
e7fd4179 | 606 | struct list_head ls_requestqueue;/* queue remote requests */ |
90135925 | 607 | struct mutex ls_requestqueue_mutex; |
4007685c | 608 | struct dlm_rcom *ls_recover_buf; |
faa0f267 | 609 | int ls_recover_nodeid; /* for debugging */ |
c04fecb4 DT |
610 | unsigned int ls_recover_dir_sent_res; /* for log info */ |
611 | unsigned int ls_recover_dir_sent_msg; /* for log info */ | |
4875647a | 612 | unsigned int ls_recover_locks_in; /* for log info */ |
4a99c3d9 | 613 | uint64_t ls_rcom_seq; |
98f176fb | 614 | spinlock_t ls_rcom_spin; |
e7fd4179 DT |
615 | struct list_head ls_recover_list; |
616 | spinlock_t ls_recover_list_lock; | |
617 | int ls_recover_list_count; | |
1d7c484e DT |
618 | struct idr ls_recover_idr; |
619 | spinlock_t ls_recover_idr_lock; | |
e7fd4179 | 620 | wait_queue_head_t ls_wait_general; |
475f230c | 621 | wait_queue_head_t ls_recover_lock_wait; |
597d0cae | 622 | struct mutex ls_clear_proc_locks; |
e7fd4179 DT |
623 | |
624 | struct list_head ls_root_list; /* root resources */ | |
625 | struct rw_semaphore ls_root_sem; /* protect root_list */ | |
626 | ||
60f98d18 DT |
627 | const struct dlm_lockspace_ops *ls_ops; |
628 | void *ls_ops_arg; | |
629 | ||
e7fd4179 DT |
630 | int ls_namelen; |
631 | char ls_name[1]; | |
632 | }; | |
633 | ||
475f230c DT |
634 | /* |
635 | * LSFL_RECOVER_STOP - dlm_ls_stop() sets this to tell dlm recovery routines | |
636 | * that they should abort what they're doing so new recovery can be started. | |
637 | * | |
638 | * LSFL_RECOVER_DOWN - dlm_ls_stop() sets this to tell dlm_recoverd that it | |
639 | * should do down_write() on the in_recovery rw_semaphore. (doing down_write | |
640 | * within dlm_ls_stop causes complaints about the lock acquired/released | |
641 | * in different contexts.) | |
642 | * | |
643 | * LSFL_RECOVER_LOCK - dlm_recoverd holds the in_recovery rw_semaphore. | |
644 | * It sets this after it is done with down_write() on the in_recovery | |
645 | * rw_semaphore and clears it after it has released the rw_semaphore. | |
646 | * | |
647 | * LSFL_RECOVER_WORK - dlm_ls_start() sets this to tell dlm_recoverd that it | |
648 | * should begin recovery of the lockspace. | |
649 | * | |
650 | * LSFL_RUNNING - set when normal locking activity is enabled. | |
651 | * dlm_ls_stop() clears this to tell dlm locking routines that they should | |
652 | * quit what they are doing so recovery can run. dlm_recoverd sets | |
653 | * this after recovery is finished. | |
654 | */ | |
655 | ||
656 | #define LSFL_RECOVER_STOP 0 | |
657 | #define LSFL_RECOVER_DOWN 1 | |
658 | #define LSFL_RECOVER_LOCK 2 | |
659 | #define LSFL_RECOVER_WORK 3 | |
660 | #define LSFL_RUNNING 4 | |
661 | ||
662 | #define LSFL_RCOM_READY 5 | |
663 | #define LSFL_RCOM_WAIT 6 | |
664 | #define LSFL_UEVENT_WAIT 7 | |
665 | #define LSFL_TIMEWARN 8 | |
666 | #define LSFL_CB_DELAY 9 | |
667 | #define LSFL_NODIR 10 | |
e7fd4179 | 668 | |
597d0cae DT |
669 | /* much of this is just saving user space pointers associated with the |
670 | lock that we pass back to the user lib with an ast */ | |
671 | ||
672 | struct dlm_user_args { | |
673 | struct dlm_user_proc *proc; /* each process that opens the lockspace | |
674 | device has private data | |
675 | (dlm_user_proc) on the struct file, | |
676 | the process's locks point back to it*/ | |
677 | struct dlm_lksb lksb; | |
597d0cae DT |
678 | struct dlm_lksb __user *user_lksb; |
679 | void __user *castparam; | |
680 | void __user *castaddr; | |
681 | void __user *bastparam; | |
682 | void __user *bastaddr; | |
d7db923e | 683 | uint64_t xid; |
597d0cae DT |
684 | }; |
685 | ||
686 | #define DLM_PROC_FLAGS_CLOSING 1 | |
687 | #define DLM_PROC_FLAGS_COMPAT 2 | |
688 | ||
689 | /* locks list is kept so we can remove all a process's locks when it | |
690 | exits (or orphan those that are persistent) */ | |
691 | ||
692 | struct dlm_user_proc { | |
693 | dlm_lockspace_t *lockspace; | |
694 | unsigned long flags; /* DLM_PROC_FLAGS */ | |
695 | struct list_head asts; | |
696 | spinlock_t asts_spin; | |
697 | struct list_head locks; | |
698 | spinlock_t locks_spin; | |
a1bc86e6 | 699 | struct list_head unlocking; |
597d0cae DT |
700 | wait_queue_head_t wait; |
701 | }; | |
702 | ||
e7fd4179 DT |
703 | static inline int dlm_locking_stopped(struct dlm_ls *ls) |
704 | { | |
705 | return !test_bit(LSFL_RUNNING, &ls->ls_flags); | |
706 | } | |
707 | ||
708 | static inline int dlm_recovery_stopped(struct dlm_ls *ls) | |
709 | { | |
475f230c | 710 | return test_bit(LSFL_RECOVER_STOP, &ls->ls_flags); |
e7fd4179 DT |
711 | } |
712 | ||
713 | static inline int dlm_no_directory(struct dlm_ls *ls) | |
714 | { | |
4875647a | 715 | return test_bit(LSFL_NODIR, &ls->ls_flags); |
e7fd4179 DT |
716 | } |
717 | ||
e028398d AB |
718 | int dlm_netlink_init(void); |
719 | void dlm_netlink_exit(void); | |
720 | void dlm_timeout_warn(struct dlm_lkb *lkb); | |
2402211a DT |
721 | int dlm_plock_init(void); |
722 | void dlm_plock_exit(void); | |
e028398d AB |
723 | |
724 | #ifdef CONFIG_DLM_DEBUG | |
725 | int dlm_register_debugfs(void); | |
726 | void dlm_unregister_debugfs(void); | |
727 | int dlm_create_debug_file(struct dlm_ls *ls); | |
728 | void dlm_delete_debug_file(struct dlm_ls *ls); | |
729 | #else | |
730 | static inline int dlm_register_debugfs(void) { return 0; } | |
731 | static inline void dlm_unregister_debugfs(void) { } | |
732 | static inline int dlm_create_debug_file(struct dlm_ls *ls) { return 0; } | |
733 | static inline void dlm_delete_debug_file(struct dlm_ls *ls) { } | |
734 | #endif | |
735 | ||
e7fd4179 DT |
736 | #endif /* __DLM_INTERNAL_DOT_H__ */ |
737 |