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