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2522fe45 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
e7fd4179 DT |
2 | /****************************************************************************** |
3 | ******************************************************************************* | |
4 | ** | |
5 | ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
60f98d18 | 6 | ** Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved. |
e7fd4179 | 7 | ** |
e7fd4179 DT |
8 | ** |
9 | ******************************************************************************* | |
10 | ******************************************************************************/ | |
11 | ||
12 | #ifndef __DLM_INTERNAL_DOT_H__ | |
13 | #define __DLM_INTERNAL_DOT_H__ | |
14 | ||
15 | /* | |
16 | * This is the main header file to be included in each DLM source file. | |
17 | */ | |
18 | ||
e7fd4179 DT |
19 | #include <linux/slab.h> |
20 | #include <linux/sched.h> | |
21 | #include <linux/types.h> | |
22 | #include <linux/ctype.h> | |
23 | #include <linux/spinlock.h> | |
24 | #include <linux/vmalloc.h> | |
25 | #include <linux/list.h> | |
26 | #include <linux/errno.h> | |
27 | #include <linux/random.h> | |
28 | #include <linux/delay.h> | |
29 | #include <linux/socket.h> | |
30 | #include <linux/kthread.h> | |
31 | #include <linux/kobject.h> | |
32 | #include <linux/kref.h> | |
33 | #include <linux/kernel.h> | |
34 | #include <linux/jhash.h> | |
597d0cae | 35 | #include <linux/miscdevice.h> |
90135925 | 36 | #include <linux/mutex.h> |
3d6aa675 | 37 | #include <linux/idr.h> |
d6e24788 | 38 | #include <linux/ratelimit.h> |
7c0f6ba6 | 39 | #include <linux/uaccess.h> |
e7fd4179 DT |
40 | |
41 | #include <linux/dlm.h> | |
99fc6487 | 42 | #include "config.h" |
e7fd4179 | 43 | |
e7fd4179 DT |
44 | /* Size of the temp buffer midcomms allocates on the stack. |
45 | We try to make this large enough so most messages fit. | |
46 | FIXME: should sctp make this unnecessary? */ | |
47 | ||
48 | #define DLM_INBUF_LEN 148 | |
49 | ||
50 | struct dlm_ls; | |
51 | struct dlm_lkb; | |
52 | struct dlm_rsb; | |
53 | struct dlm_member; | |
e7fd4179 | 54 | struct dlm_rsbtable; |
e7fd4179 DT |
55 | struct dlm_recover; |
56 | struct dlm_header; | |
57 | struct dlm_message; | |
58 | struct dlm_rcom; | |
59 | struct dlm_mhandle; | |
60 | ||
61 | #define log_print(fmt, args...) \ | |
62 | printk(KERN_ERR "dlm: "fmt"\n" , ##args) | |
63 | #define log_error(ls, fmt, args...) \ | |
64 | printk(KERN_ERR "dlm: %s: " fmt "\n", (ls)->ls_name , ##args) | |
505ee528 | 65 | |
075f0177 | 66 | #define log_rinfo(ls, fmt, args...) \ |
505ee528 ZL |
67 | do { \ |
68 | if (dlm_config.ci_log_info) \ | |
69 | printk(KERN_INFO "dlm: %s: " fmt "\n", \ | |
70 | (ls)->ls_name, ##args); \ | |
71 | else if (dlm_config.ci_log_debug) \ | |
72 | printk(KERN_DEBUG "dlm: %s: " fmt "\n", \ | |
73 | (ls)->ls_name , ##args); \ | |
74 | } while (0) | |
e7fd4179 | 75 | |
99fc6487 DT |
76 | #define log_debug(ls, fmt, args...) \ |
77 | do { \ | |
78 | if (dlm_config.ci_log_debug) \ | |
79 | printk(KERN_DEBUG "dlm: %s: " fmt "\n", \ | |
80 | (ls)->ls_name , ##args); \ | |
81 | } while (0) | |
e7fd4179 | 82 | |
d6e24788 DT |
83 | #define log_limit(ls, fmt, args...) \ |
84 | do { \ | |
85 | if (dlm_config.ci_log_debug) \ | |
86 | printk_ratelimited(KERN_DEBUG "dlm: %s: " fmt "\n", \ | |
87 | (ls)->ls_name , ##args); \ | |
88 | } while (0) | |
89 | ||
e7fd4179 DT |
90 | #define DLM_ASSERT(x, do) \ |
91 | { \ | |
92 | if (!(x)) \ | |
93 | { \ | |
94 | printk(KERN_ERR "\nDLM: Assertion failed on line %d of file %s\n" \ | |
95 | "DLM: assertion: \"%s\"\n" \ | |
96 | "DLM: time = %lu\n", \ | |
97 | __LINE__, __FILE__, #x, jiffies); \ | |
98 | {do} \ | |
99 | printk("\n"); \ | |
e7fd4179 DT |
100 | panic("DLM: Record message above and reboot.\n"); \ |
101 | } \ | |
102 | } | |
103 | ||
104 | ||
f1172283 DT |
105 | #define DLM_RTF_SHRINK 0x00000001 |
106 | ||
e7fd4179 | 107 | struct dlm_rsbtable { |
9beb3bf5 BP |
108 | struct rb_root keep; |
109 | struct rb_root toss; | |
c7be761a | 110 | spinlock_t lock; |
f1172283 | 111 | uint32_t flags; |
e7fd4179 DT |
112 | }; |
113 | ||
e7fd4179 DT |
114 | |
115 | /* | |
116 | * Lockspace member (per node in a ls) | |
117 | */ | |
118 | ||
119 | struct dlm_member { | |
120 | struct list_head list; | |
121 | int nodeid; | |
122 | int weight; | |
757a4271 DT |
123 | int slot; |
124 | int slot_prev; | |
60f98d18 | 125 | int comm_seq; |
757a4271 DT |
126 | uint32_t generation; |
127 | }; | |
128 | ||
e7fd4179 DT |
129 | /* |
130 | * Save and manage recovery state for a lockspace. | |
131 | */ | |
132 | ||
133 | struct dlm_recover { | |
134 | struct list_head list; | |
60f98d18 DT |
135 | struct dlm_config_node *nodes; |
136 | int nodes_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 | ||
e7fd4179 DT |
195 | /* lkb_status */ |
196 | ||
197 | #define DLM_LKSTS_WAITING 1 | |
198 | #define DLM_LKSTS_GRANTED 2 | |
199 | #define DLM_LKSTS_CONVERT 3 | |
200 | ||
201 | /* lkb_flags */ | |
202 | ||
203 | #define DLM_IFL_MSTCPY 0x00010000 | |
204 | #define DLM_IFL_RESEND 0x00020000 | |
597d0cae | 205 | #define DLM_IFL_DEAD 0x00040000 |
ef0c2bb0 DT |
206 | #define DLM_IFL_OVERLAP_UNLOCK 0x00080000 |
207 | #define DLM_IFL_OVERLAP_CANCEL 0x00100000 | |
208 | #define DLM_IFL_ENDOFLIFE 0x00200000 | |
3ae1acf9 | 209 | #define DLM_IFL_WATCH_TIMEWARN 0x00400000 |
84d8cd69 | 210 | #define DLM_IFL_TIMEOUT_CANCEL 0x00800000 |
8b4021fa | 211 | #define DLM_IFL_DEADLOCK_CANCEL 0x01000000 |
2a7ce0ed | 212 | #define DLM_IFL_STUB_MS 0x02000000 /* magic number for m_flags */ |
597d0cae DT |
213 | #define DLM_IFL_USER 0x00000001 |
214 | #define DLM_IFL_ORPHAN 0x00000002 | |
e7fd4179 | 215 | |
8304d6f2 DT |
216 | #define DLM_CALLBACKS_SIZE 6 |
217 | ||
218 | #define DLM_CB_CAST 0x00000001 | |
219 | #define DLM_CB_BAST 0x00000002 | |
220 | #define DLM_CB_SKIP 0x00000004 | |
221 | ||
222 | struct dlm_callback { | |
223 | uint64_t seq; | |
224 | uint32_t flags; /* DLM_CBF_ */ | |
225 | int sb_status; /* copy to lksb status */ | |
226 | uint8_t sb_flags; /* copy to lksb flags */ | |
227 | int8_t mode; /* rq mode of bast, gr mode of cast */ | |
228 | }; | |
229 | ||
e7fd4179 DT |
230 | struct dlm_lkb { |
231 | struct dlm_rsb *lkb_resource; /* the rsb */ | |
232 | struct kref lkb_ref; | |
233 | int lkb_nodeid; /* copied from rsb */ | |
234 | int lkb_ownpid; /* pid of lock owner */ | |
235 | uint32_t lkb_id; /* our lock ID */ | |
236 | uint32_t lkb_remid; /* lock ID on remote partner */ | |
237 | uint32_t lkb_exflags; /* external flags from caller */ | |
238 | uint32_t lkb_sbflags; /* lksb flags */ | |
239 | uint32_t lkb_flags; /* internal flags */ | |
240 | uint32_t lkb_lvbseq; /* lvb sequence number */ | |
241 | ||
242 | int8_t lkb_status; /* granted, waiting, convert */ | |
243 | int8_t lkb_rqmode; /* requested lock mode */ | |
244 | int8_t lkb_grmode; /* granted lock mode */ | |
e7fd4179 | 245 | int8_t lkb_highbast; /* highest mode bast sent for */ |
7fe2b319 | 246 | |
e7fd4179 | 247 | int8_t lkb_wait_type; /* type of reply waiting for */ |
ef0c2bb0 | 248 | int8_t lkb_wait_count; |
c6ff669b | 249 | int lkb_wait_nodeid; /* for debugging */ |
e7fd4179 | 250 | |
e7fd4179 DT |
251 | struct list_head lkb_statequeue; /* rsb g/c/w list */ |
252 | struct list_head lkb_rsb_lookup; /* waiting for rsb lookup */ | |
253 | struct list_head lkb_wait_reply; /* waiting for remote reply */ | |
597d0cae | 254 | struct list_head lkb_ownqueue; /* list of locks for a process */ |
3ae1acf9 | 255 | struct list_head lkb_time_list; |
eeda418d | 256 | ktime_t lkb_timestamp; |
c6ff669b | 257 | ktime_t lkb_wait_time; |
3ae1acf9 | 258 | unsigned long lkb_timeout_cs; |
e7fd4179 | 259 | |
23e8e1aa DT |
260 | struct mutex lkb_cb_mutex; |
261 | struct work_struct lkb_cb_work; | |
262 | struct list_head lkb_cb_list; /* for ls_cb_delay or proc->asts */ | |
8304d6f2 DT |
263 | struct dlm_callback lkb_callbacks[DLM_CALLBACKS_SIZE]; |
264 | struct dlm_callback lkb_last_cast; | |
265 | struct dlm_callback lkb_last_bast; | |
266 | ktime_t lkb_last_cast_time; /* for debugging */ | |
267 | ktime_t lkb_last_bast_time; /* for debugging */ | |
268 | ||
4875647a DT |
269 | uint64_t lkb_recover_seq; /* from ls_recover_seq */ |
270 | ||
e7fd4179 DT |
271 | char *lkb_lvbptr; |
272 | struct dlm_lksb *lkb_lksb; /* caller's status block */ | |
e5dae548 DT |
273 | void (*lkb_astfn) (void *astparam); |
274 | void (*lkb_bastfn) (void *astparam, int mode); | |
d292c0cc DT |
275 | union { |
276 | void *lkb_astparam; /* caller's ast arg */ | |
277 | struct dlm_user_args *lkb_ua; | |
278 | }; | |
e7fd4179 DT |
279 | }; |
280 | ||
c04fecb4 DT |
281 | /* |
282 | * res_master_nodeid is "normal": 0 is unset/invalid, non-zero is the real | |
283 | * nodeid, even when nodeid is our_nodeid. | |
284 | * | |
285 | * res_nodeid is "odd": -1 is unset/invalid, zero means our_nodeid, | |
286 | * greater than zero when another nodeid. | |
287 | * | |
288 | * (TODO: remove res_nodeid and only use res_master_nodeid) | |
289 | */ | |
e7fd4179 DT |
290 | |
291 | struct dlm_rsb { | |
292 | struct dlm_ls *res_ls; /* the lockspace */ | |
293 | struct kref res_ref; | |
90135925 | 294 | struct mutex res_mutex; |
e7fd4179 DT |
295 | unsigned long res_flags; |
296 | int res_length; /* length of rsb name */ | |
297 | int res_nodeid; | |
c04fecb4 DT |
298 | int res_master_nodeid; |
299 | int res_dir_nodeid; | |
1d7c484e | 300 | int res_id; /* for ls_recover_idr */ |
e7fd4179 DT |
301 | uint32_t res_lvbseq; |
302 | uint32_t res_hash; | |
303 | uint32_t res_bucket; /* rsbtbl */ | |
304 | unsigned long res_toss_time; | |
305 | uint32_t res_first_lkid; | |
306 | struct list_head res_lookup; /* lkbs waiting on first */ | |
9beb3bf5 BP |
307 | union { |
308 | struct list_head res_hashchain; | |
309 | struct rb_node res_hashnode; /* rsbtbl */ | |
310 | }; | |
e7fd4179 DT |
311 | struct list_head res_grantqueue; |
312 | struct list_head res_convertqueue; | |
313 | struct list_head res_waitqueue; | |
314 | ||
315 | struct list_head res_root_list; /* used for recovery */ | |
316 | struct list_head res_recover_list; /* used for recovery */ | |
317 | int res_recover_locks_count; | |
318 | ||
319 | char *res_lvbptr; | |
3881ac04 | 320 | char res_name[DLM_RESNAME_MAXLEN+1]; |
e7fd4179 DT |
321 | }; |
322 | ||
c04fecb4 DT |
323 | /* dlm_master_lookup() flags */ |
324 | ||
325 | #define DLM_LU_RECOVER_DIR 1 | |
326 | #define DLM_LU_RECOVER_MASTER 2 | |
327 | ||
328 | /* dlm_master_lookup() results */ | |
329 | ||
330 | #define DLM_LU_MATCH 1 | |
331 | #define DLM_LU_ADD 2 | |
332 | ||
e7fd4179 DT |
333 | /* find_rsb() flags */ |
334 | ||
c04fecb4 DT |
335 | #define R_REQUEST 0x00000001 |
336 | #define R_RECEIVE_REQUEST 0x00000002 | |
337 | #define R_RECEIVE_RECOVER 0x00000004 | |
e7fd4179 DT |
338 | |
339 | /* rsb_flags */ | |
340 | ||
341 | enum rsb_flags { | |
342 | RSB_MASTER_UNCERTAIN, | |
343 | RSB_VALNOTVALID, | |
344 | RSB_VALNOTVALID_PREV, | |
345 | RSB_NEW_MASTER, | |
346 | RSB_NEW_MASTER2, | |
347 | RSB_RECOVER_CONVERT, | |
4875647a | 348 | RSB_RECOVER_GRANT, |
da8c6663 | 349 | RSB_RECOVER_LVB_INVAL, |
e7fd4179 DT |
350 | }; |
351 | ||
352 | static inline void rsb_set_flag(struct dlm_rsb *r, enum rsb_flags flag) | |
353 | { | |
354 | __set_bit(flag, &r->res_flags); | |
355 | } | |
356 | ||
357 | static inline void rsb_clear_flag(struct dlm_rsb *r, enum rsb_flags flag) | |
358 | { | |
359 | __clear_bit(flag, &r->res_flags); | |
360 | } | |
361 | ||
362 | static inline int rsb_flag(struct dlm_rsb *r, enum rsb_flags flag) | |
363 | { | |
364 | return test_bit(flag, &r->res_flags); | |
365 | } | |
366 | ||
367 | ||
368 | /* dlm_header is first element of all structs sent between nodes */ | |
369 | ||
38aa8b0c | 370 | #define DLM_HEADER_MAJOR 0x00030000 |
757a4271 DT |
371 | #define DLM_HEADER_MINOR 0x00000001 |
372 | ||
373 | #define DLM_HEADER_SLOTS 0x00000001 | |
e7fd4179 DT |
374 | |
375 | #define DLM_MSG 1 | |
376 | #define DLM_RCOM 2 | |
377 | ||
378 | struct dlm_header { | |
379 | uint32_t h_version; | |
380 | uint32_t h_lockspace; | |
381 | uint32_t h_nodeid; /* nodeid of sender */ | |
382 | uint16_t h_length; | |
383 | uint8_t h_cmd; /* DLM_MSG, DLM_RCOM */ | |
384 | uint8_t h_pad; | |
385 | }; | |
386 | ||
387 | ||
388 | #define DLM_MSG_REQUEST 1 | |
389 | #define DLM_MSG_CONVERT 2 | |
390 | #define DLM_MSG_UNLOCK 3 | |
391 | #define DLM_MSG_CANCEL 4 | |
392 | #define DLM_MSG_REQUEST_REPLY 5 | |
393 | #define DLM_MSG_CONVERT_REPLY 6 | |
394 | #define DLM_MSG_UNLOCK_REPLY 7 | |
395 | #define DLM_MSG_CANCEL_REPLY 8 | |
396 | #define DLM_MSG_GRANT 9 | |
397 | #define DLM_MSG_BAST 10 | |
398 | #define DLM_MSG_LOOKUP 11 | |
399 | #define DLM_MSG_REMOVE 12 | |
400 | #define DLM_MSG_LOOKUP_REPLY 13 | |
8499137d | 401 | #define DLM_MSG_PURGE 14 |
e7fd4179 DT |
402 | |
403 | struct dlm_message { | |
404 | struct dlm_header m_header; | |
405 | uint32_t m_type; /* DLM_MSG_ */ | |
406 | uint32_t m_nodeid; | |
407 | uint32_t m_pid; | |
408 | uint32_t m_lkid; /* lkid on sender */ | |
409 | uint32_t m_remid; /* lkid on receiver */ | |
410 | uint32_t m_parent_lkid; | |
411 | uint32_t m_parent_remid; | |
412 | uint32_t m_exflags; | |
413 | uint32_t m_sbflags; | |
414 | uint32_t m_flags; | |
415 | uint32_t m_lvbseq; | |
416 | uint32_t m_hash; | |
417 | int m_status; | |
418 | int m_grmode; | |
419 | int m_rqmode; | |
420 | int m_bastmode; | |
421 | int m_asts; | |
422 | int m_result; /* 0 or -EXXX */ | |
a4e439a6 | 423 | char m_extra[]; /* name or lvb */ |
e7fd4179 DT |
424 | }; |
425 | ||
426 | ||
427 | #define DLM_RS_NODES 0x00000001 | |
428 | #define DLM_RS_NODES_ALL 0x00000002 | |
429 | #define DLM_RS_DIR 0x00000004 | |
430 | #define DLM_RS_DIR_ALL 0x00000008 | |
431 | #define DLM_RS_LOCKS 0x00000010 | |
432 | #define DLM_RS_LOCKS_ALL 0x00000020 | |
433 | #define DLM_RS_DONE 0x00000040 | |
434 | #define DLM_RS_DONE_ALL 0x00000080 | |
435 | ||
436 | #define DLM_RCOM_STATUS 1 | |
437 | #define DLM_RCOM_NAMES 2 | |
438 | #define DLM_RCOM_LOOKUP 3 | |
439 | #define DLM_RCOM_LOCK 4 | |
440 | #define DLM_RCOM_STATUS_REPLY 5 | |
441 | #define DLM_RCOM_NAMES_REPLY 6 | |
442 | #define DLM_RCOM_LOOKUP_REPLY 7 | |
443 | #define DLM_RCOM_LOCK_REPLY 8 | |
444 | ||
445 | struct dlm_rcom { | |
446 | struct dlm_header rc_header; | |
447 | uint32_t rc_type; /* DLM_RCOM_ */ | |
448 | int rc_result; /* multi-purpose */ | |
449 | uint64_t rc_id; /* match reply with request */ | |
38aa8b0c DT |
450 | uint64_t rc_seq; /* sender's ls_recover_seq */ |
451 | uint64_t rc_seq_reply; /* remote ls_recover_seq */ | |
a4e439a6 | 452 | char rc_buf[]; |
e7fd4179 DT |
453 | }; |
454 | ||
eef7d739 AV |
455 | union dlm_packet { |
456 | struct dlm_header header; /* common to other two */ | |
457 | struct dlm_message message; | |
458 | struct dlm_rcom rcom; | |
459 | }; | |
460 | ||
757a4271 DT |
461 | #define DLM_RSF_NEED_SLOTS 0x00000001 |
462 | ||
463 | /* RCOM_STATUS data */ | |
464 | struct rcom_status { | |
465 | __le32 rs_flags; | |
466 | __le32 rs_unused1; | |
467 | __le64 rs_unused2; | |
468 | }; | |
469 | ||
470 | /* RCOM_STATUS_REPLY data */ | |
e7fd4179 | 471 | struct rcom_config { |
93ff2971 AV |
472 | __le32 rf_lvblen; |
473 | __le32 rf_lsflags; | |
757a4271 DT |
474 | |
475 | /* DLM_HEADER_SLOTS adds: */ | |
476 | __le32 rf_flags; | |
477 | __le16 rf_our_slot; | |
478 | __le16 rf_num_slots; | |
479 | __le32 rf_generation; | |
480 | __le32 rf_unused1; | |
481 | __le64 rf_unused2; | |
482 | }; | |
483 | ||
484 | struct rcom_slot { | |
485 | __le32 ro_nodeid; | |
486 | __le16 ro_slot; | |
487 | __le16 ro_unused1; | |
488 | __le64 ro_unused2; | |
e7fd4179 DT |
489 | }; |
490 | ||
491 | struct rcom_lock { | |
163a1859 AV |
492 | __le32 rl_ownpid; |
493 | __le32 rl_lkid; | |
494 | __le32 rl_remid; | |
495 | __le32 rl_parent_lkid; | |
496 | __le32 rl_parent_remid; | |
497 | __le32 rl_exflags; | |
498 | __le32 rl_flags; | |
499 | __le32 rl_lvbseq; | |
500 | __le32 rl_result; | |
e7fd4179 DT |
501 | int8_t rl_rqmode; |
502 | int8_t rl_grmode; | |
503 | int8_t rl_status; | |
504 | int8_t rl_asts; | |
163a1859 AV |
505 | __le16 rl_wait_type; |
506 | __le16 rl_namelen; | |
e7fd4179 | 507 | char rl_name[DLM_RESNAME_MAXLEN]; |
a4e439a6 | 508 | char rl_lvb[]; |
e7fd4179 DT |
509 | }; |
510 | ||
05c32f47 DT |
511 | /* |
512 | * The max number of resources per rsbtbl bucket that shrink will attempt | |
513 | * to remove in each iteration. | |
514 | */ | |
515 | ||
516 | #define DLM_REMOVE_NAMES_MAX 8 | |
517 | ||
e7fd4179 DT |
518 | struct dlm_ls { |
519 | struct list_head ls_list; /* list of lockspaces */ | |
597d0cae | 520 | dlm_lockspace_t *ls_local_handle; |
e7fd4179 | 521 | uint32_t ls_global_id; /* global unique lockspace ID */ |
757a4271 | 522 | uint32_t ls_generation; |
e7fd4179 DT |
523 | uint32_t ls_exflags; |
524 | int ls_lvblen; | |
0f8e0d9a DT |
525 | int ls_count; /* refcount of processes in |
526 | the dlm using this ls */ | |
527 | int ls_create_count; /* create/release refcount */ | |
e7fd4179 | 528 | unsigned long ls_flags; /* LSFL_ */ |
c1dcf65f | 529 | unsigned long ls_scan_time; |
e7fd4179 DT |
530 | struct kobject ls_kobj; |
531 | ||
3d6aa675 DT |
532 | struct idr ls_lkbidr; |
533 | spinlock_t ls_lkbidr_spin; | |
534 | ||
e7fd4179 DT |
535 | struct dlm_rsbtable *ls_rsbtbl; |
536 | uint32_t ls_rsbtbl_size; | |
537 | ||
90135925 | 538 | struct mutex ls_waiters_mutex; |
e7fd4179 DT |
539 | struct list_head ls_waiters; /* lkbs needing a reply */ |
540 | ||
ef0c2bb0 DT |
541 | struct mutex ls_orphans_mutex; |
542 | struct list_head ls_orphans; | |
543 | ||
3ae1acf9 DT |
544 | struct mutex ls_timeout_mutex; |
545 | struct list_head ls_timeout; | |
546 | ||
3881ac04 DT |
547 | spinlock_t ls_new_rsb_spin; |
548 | int ls_new_rsb_count; | |
549 | struct list_head ls_new_rsb; /* new rsb structs */ | |
550 | ||
05c32f47 DT |
551 | spinlock_t ls_remove_spin; |
552 | char ls_remove_name[DLM_RESNAME_MAXLEN+1]; | |
553 | char *ls_remove_names[DLM_REMOVE_NAMES_MAX]; | |
554 | int ls_remove_len; | |
555 | int ls_remove_lens[DLM_REMOVE_NAMES_MAX]; | |
556 | ||
e7fd4179 DT |
557 | struct list_head ls_nodes; /* current nodes in ls */ |
558 | struct list_head ls_nodes_gone; /* dead node list, recovery */ | |
559 | int ls_num_nodes; /* number of nodes in ls */ | |
560 | int ls_low_nodeid; | |
561 | int ls_total_weight; | |
562 | int *ls_node_array; | |
563 | ||
757a4271 DT |
564 | int ls_slot; |
565 | int ls_num_slots; | |
566 | int ls_slots_size; | |
567 | struct dlm_slot *ls_slots; | |
568 | ||
e7fd4179 DT |
569 | struct dlm_rsb ls_stub_rsb; /* for returning errors */ |
570 | struct dlm_lkb ls_stub_lkb; /* for returning errors */ | |
571 | struct dlm_message ls_stub_ms; /* for faking a reply */ | |
572 | ||
5de6319b DT |
573 | struct dentry *ls_debug_rsb_dentry; /* debugfs */ |
574 | struct dentry *ls_debug_waiters_dentry; /* debugfs */ | |
ac90a255 | 575 | struct dentry *ls_debug_locks_dentry; /* debugfs */ |
d022509d | 576 | struct dentry *ls_debug_all_dentry; /* debugfs */ |
c04fecb4 | 577 | struct dentry *ls_debug_toss_dentry; /* debugfs */ |
e7fd4179 DT |
578 | |
579 | wait_queue_head_t ls_uevent_wait; /* user part of join/leave */ | |
580 | int ls_uevent_result; | |
8b0e7b2c DT |
581 | struct completion ls_members_done; |
582 | int ls_members_result; | |
e7fd4179 | 583 | |
597d0cae DT |
584 | struct miscdevice ls_device; |
585 | ||
23e8e1aa DT |
586 | struct workqueue_struct *ls_callback_wq; |
587 | ||
e7fd4179 DT |
588 | /* recovery related */ |
589 | ||
23e8e1aa DT |
590 | struct mutex ls_cb_mutex; |
591 | struct list_head ls_cb_delay; /* save for queue_work later */ | |
e7fd4179 DT |
592 | struct timer_list ls_timer; |
593 | struct task_struct *ls_recoverd_task; | |
90135925 | 594 | struct mutex ls_recoverd_active; |
e7fd4179 | 595 | spinlock_t ls_recover_lock; |
3ae1acf9 | 596 | unsigned long ls_recover_begin; /* jiffies timestamp */ |
e7fd4179 DT |
597 | uint32_t ls_recover_status; /* DLM_RS_ */ |
598 | uint64_t ls_recover_seq; | |
599 | struct dlm_recover *ls_recover_args; | |
600 | struct rw_semaphore ls_in_recovery; /* block local requests */ | |
c36258b5 | 601 | struct rw_semaphore ls_recv_active; /* block dlm_recv */ |
e7fd4179 | 602 | struct list_head ls_requestqueue;/* queue remote requests */ |
90135925 | 603 | struct mutex ls_requestqueue_mutex; |
4007685c | 604 | struct dlm_rcom *ls_recover_buf; |
faa0f267 | 605 | int ls_recover_nodeid; /* for debugging */ |
c04fecb4 DT |
606 | unsigned int ls_recover_dir_sent_res; /* for log info */ |
607 | unsigned int ls_recover_dir_sent_msg; /* for log info */ | |
4875647a | 608 | unsigned int ls_recover_locks_in; /* for log info */ |
4a99c3d9 | 609 | uint64_t ls_rcom_seq; |
98f176fb | 610 | spinlock_t ls_rcom_spin; |
e7fd4179 DT |
611 | struct list_head ls_recover_list; |
612 | spinlock_t ls_recover_list_lock; | |
613 | int ls_recover_list_count; | |
1d7c484e DT |
614 | struct idr ls_recover_idr; |
615 | spinlock_t ls_recover_idr_lock; | |
e7fd4179 | 616 | wait_queue_head_t ls_wait_general; |
475f230c | 617 | wait_queue_head_t ls_recover_lock_wait; |
597d0cae | 618 | struct mutex ls_clear_proc_locks; |
e7fd4179 DT |
619 | |
620 | struct list_head ls_root_list; /* root resources */ | |
621 | struct rw_semaphore ls_root_sem; /* protect root_list */ | |
622 | ||
60f98d18 DT |
623 | const struct dlm_lockspace_ops *ls_ops; |
624 | void *ls_ops_arg; | |
625 | ||
e7fd4179 DT |
626 | int ls_namelen; |
627 | char ls_name[1]; | |
628 | }; | |
629 | ||
475f230c DT |
630 | /* |
631 | * LSFL_RECOVER_STOP - dlm_ls_stop() sets this to tell dlm recovery routines | |
632 | * that they should abort what they're doing so new recovery can be started. | |
633 | * | |
634 | * LSFL_RECOVER_DOWN - dlm_ls_stop() sets this to tell dlm_recoverd that it | |
635 | * should do down_write() on the in_recovery rw_semaphore. (doing down_write | |
636 | * within dlm_ls_stop causes complaints about the lock acquired/released | |
637 | * in different contexts.) | |
638 | * | |
639 | * LSFL_RECOVER_LOCK - dlm_recoverd holds the in_recovery rw_semaphore. | |
640 | * It sets this after it is done with down_write() on the in_recovery | |
641 | * rw_semaphore and clears it after it has released the rw_semaphore. | |
642 | * | |
643 | * LSFL_RECOVER_WORK - dlm_ls_start() sets this to tell dlm_recoverd that it | |
644 | * should begin recovery of the lockspace. | |
645 | * | |
646 | * LSFL_RUNNING - set when normal locking activity is enabled. | |
647 | * dlm_ls_stop() clears this to tell dlm locking routines that they should | |
648 | * quit what they are doing so recovery can run. dlm_recoverd sets | |
649 | * this after recovery is finished. | |
650 | */ | |
651 | ||
652 | #define LSFL_RECOVER_STOP 0 | |
653 | #define LSFL_RECOVER_DOWN 1 | |
654 | #define LSFL_RECOVER_LOCK 2 | |
655 | #define LSFL_RECOVER_WORK 3 | |
656 | #define LSFL_RUNNING 4 | |
657 | ||
658 | #define LSFL_RCOM_READY 5 | |
659 | #define LSFL_RCOM_WAIT 6 | |
660 | #define LSFL_UEVENT_WAIT 7 | |
661 | #define LSFL_TIMEWARN 8 | |
662 | #define LSFL_CB_DELAY 9 | |
663 | #define LSFL_NODIR 10 | |
e7fd4179 | 664 | |
597d0cae DT |
665 | /* much of this is just saving user space pointers associated with the |
666 | lock that we pass back to the user lib with an ast */ | |
667 | ||
668 | struct dlm_user_args { | |
669 | struct dlm_user_proc *proc; /* each process that opens the lockspace | |
670 | device has private data | |
671 | (dlm_user_proc) on the struct file, | |
672 | the process's locks point back to it*/ | |
673 | struct dlm_lksb lksb; | |
597d0cae DT |
674 | struct dlm_lksb __user *user_lksb; |
675 | void __user *castparam; | |
676 | void __user *castaddr; | |
677 | void __user *bastparam; | |
678 | void __user *bastaddr; | |
d7db923e | 679 | uint64_t xid; |
597d0cae DT |
680 | }; |
681 | ||
682 | #define DLM_PROC_FLAGS_CLOSING 1 | |
683 | #define DLM_PROC_FLAGS_COMPAT 2 | |
684 | ||
685 | /* locks list is kept so we can remove all a process's locks when it | |
686 | exits (or orphan those that are persistent) */ | |
687 | ||
688 | struct dlm_user_proc { | |
689 | dlm_lockspace_t *lockspace; | |
690 | unsigned long flags; /* DLM_PROC_FLAGS */ | |
691 | struct list_head asts; | |
692 | spinlock_t asts_spin; | |
693 | struct list_head locks; | |
694 | spinlock_t locks_spin; | |
a1bc86e6 | 695 | struct list_head unlocking; |
597d0cae DT |
696 | wait_queue_head_t wait; |
697 | }; | |
698 | ||
e7fd4179 DT |
699 | static inline int dlm_locking_stopped(struct dlm_ls *ls) |
700 | { | |
701 | return !test_bit(LSFL_RUNNING, &ls->ls_flags); | |
702 | } | |
703 | ||
704 | static inline int dlm_recovery_stopped(struct dlm_ls *ls) | |
705 | { | |
475f230c | 706 | return test_bit(LSFL_RECOVER_STOP, &ls->ls_flags); |
e7fd4179 DT |
707 | } |
708 | ||
709 | static inline int dlm_no_directory(struct dlm_ls *ls) | |
710 | { | |
4875647a | 711 | return test_bit(LSFL_NODIR, &ls->ls_flags); |
e7fd4179 DT |
712 | } |
713 | ||
e028398d AB |
714 | int dlm_netlink_init(void); |
715 | void dlm_netlink_exit(void); | |
716 | void dlm_timeout_warn(struct dlm_lkb *lkb); | |
2402211a DT |
717 | int dlm_plock_init(void); |
718 | void dlm_plock_exit(void); | |
e028398d AB |
719 | |
720 | #ifdef CONFIG_DLM_DEBUG | |
a48f9721 | 721 | void dlm_register_debugfs(void); |
e028398d | 722 | void dlm_unregister_debugfs(void); |
a48f9721 | 723 | void dlm_create_debug_file(struct dlm_ls *ls); |
e028398d AB |
724 | void dlm_delete_debug_file(struct dlm_ls *ls); |
725 | #else | |
a48f9721 | 726 | static inline void dlm_register_debugfs(void) { } |
e028398d | 727 | static inline void dlm_unregister_debugfs(void) { } |
a48f9721 | 728 | static inline void dlm_create_debug_file(struct dlm_ls *ls) { } |
e028398d AB |
729 | static inline void dlm_delete_debug_file(struct dlm_ls *ls) { } |
730 | #endif | |
731 | ||
e7fd4179 DT |
732 | #endif /* __DLM_INTERNAL_DOT_H__ */ |
733 |