[DLM] force removal of user lockspace
[linux-2.6-block.git] / fs / gfs2 / incore.h
CommitLineData
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1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3a8a9a10 3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
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4 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License v.2.
8 */
9
10#ifndef __INCORE_DOT_H__
11#define __INCORE_DOT_H__
12
13#define DIO_FORCE 0x00000001
14#define DIO_CLEAN 0x00000002
15#define DIO_DIRTY 0x00000004
16#define DIO_START 0x00000008
17#define DIO_WAIT 0x00000010
18#define DIO_METADATA 0x00000020
19#define DIO_DATA 0x00000040
20#define DIO_RELEASE 0x00000080
21#define DIO_ALL 0x00000100
22
23struct gfs2_log_operations;
24struct gfs2_log_element;
25struct gfs2_bitmap;
26struct gfs2_rgrpd;
27struct gfs2_bufdata;
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28struct gfs2_glock_operations;
29struct gfs2_holder;
30struct gfs2_glock;
31struct gfs2_alloc;
32struct gfs2_inode;
33struct gfs2_file;
34struct gfs2_revoke;
35struct gfs2_revoke_replay;
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36struct gfs2_quota_data;
37struct gfs2_log_buf;
38struct gfs2_trans;
39struct gfs2_ail;
40struct gfs2_jdesc;
41struct gfs2_args;
42struct gfs2_tune;
43struct gfs2_gl_hash_bucket;
44struct gfs2_sbd;
45
46typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
47
48/*
49 * Structure of operations that are associated with each
50 * type of element in the log.
51 */
52
53struct gfs2_log_operations {
54 void (*lo_add) (struct gfs2_sbd *sdp, struct gfs2_log_element *le);
55 void (*lo_incore_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr);
56 void (*lo_before_commit) (struct gfs2_sbd *sdp);
57 void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_ail *ai);
58 void (*lo_before_scan) (struct gfs2_jdesc *jd,
59 struct gfs2_log_header *head, int pass);
60 int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start,
61 struct gfs2_log_descriptor *ld, __be64 *ptr,
62 int pass);
63 void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass);
b09e593d 64 const char *lo_name;
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65};
66
67struct gfs2_log_element {
68 struct list_head le_list;
b09e593d 69 const struct gfs2_log_operations *le_ops;
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70};
71
72struct gfs2_bitmap {
73 struct buffer_head *bi_bh;
74 char *bi_clone;
75 uint32_t bi_offset;
76 uint32_t bi_start;
77 uint32_t bi_len;
78};
79
80struct gfs2_rgrpd {
81 struct list_head rd_list; /* Link with superblock */
82 struct list_head rd_list_mru;
83 struct list_head rd_recent; /* Recently used rgrps */
84 struct gfs2_glock *rd_gl; /* Glock for this rgrp */
85 struct gfs2_rindex rd_ri;
86 struct gfs2_rgrp rd_rg;
87 uint64_t rd_rg_vn;
88 struct gfs2_bitmap *rd_bits;
89 unsigned int rd_bh_count;
f55ab26a 90 struct mutex rd_mutex;
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91 uint32_t rd_free_clone;
92 struct gfs2_log_element rd_le;
93 uint32_t rd_last_alloc_data;
94 uint32_t rd_last_alloc_meta;
95 struct gfs2_sbd *rd_sbd;
96};
97
98enum gfs2_state_bits {
99 BH_Pinned = BH_PrivateStart,
f42faf4f 100 BH_Escaped = BH_PrivateStart + 1,
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101};
102
103BUFFER_FNS(Pinned, pinned)
104TAS_BUFFER_FNS(Pinned, pinned)
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105BUFFER_FNS(Escaped, escaped)
106TAS_BUFFER_FNS(Escaped, escaped)
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107
108struct gfs2_bufdata {
109 struct buffer_head *bd_bh;
110 struct gfs2_glock *bd_gl;
111
112 struct list_head bd_list_tr;
113 struct gfs2_log_element bd_le;
114
115 struct gfs2_ail *bd_ail;
116 struct list_head bd_ail_st_list;
117 struct list_head bd_ail_gl_list;
118};
119
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120struct gfs2_glock_operations {
121 void (*go_xmote_th) (struct gfs2_glock * gl, unsigned int state,
122 int flags);
123 void (*go_xmote_bh) (struct gfs2_glock * gl);
124 void (*go_drop_th) (struct gfs2_glock * gl);
125 void (*go_drop_bh) (struct gfs2_glock * gl);
126 void (*go_sync) (struct gfs2_glock * gl, int flags);
127 void (*go_inval) (struct gfs2_glock * gl, int flags);
128 int (*go_demote_ok) (struct gfs2_glock * gl);
129 int (*go_lock) (struct gfs2_holder * gh);
130 void (*go_unlock) (struct gfs2_holder * gh);
131 void (*go_callback) (struct gfs2_glock * gl, unsigned int state);
132 void (*go_greedy) (struct gfs2_glock * gl);
8fb4b536 133 const int go_type;
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134};
135
136enum {
137 /* Actions */
138 HIF_MUTEX = 0,
139 HIF_PROMOTE = 1,
140 HIF_DEMOTE = 2,
141 HIF_GREEDY = 3,
142
143 /* States */
144 HIF_ALLOCED = 4,
145 HIF_DEALLOC = 5,
146 HIF_HOLDER = 6,
147 HIF_FIRST = 7,
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148 HIF_ABORTED = 9,
149};
150
151struct gfs2_holder {
152 struct list_head gh_list;
153
154 struct gfs2_glock *gh_gl;
155 struct task_struct *gh_owner;
156 unsigned int gh_state;
fe1bdedc 157 unsigned gh_flags;
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158
159 int gh_error;
695165df 160 unsigned long gh_iflags;
b3b94faa 161 struct completion gh_wait;
d0dc80db 162 unsigned long gh_ip;
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163};
164
165enum {
166 GLF_PLUG = 0,
167 GLF_LOCK = 1,
168 GLF_STICKY = 2,
169 GLF_PREFETCH = 3,
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170 GLF_DIRTY = 5,
171 GLF_SKIP_WAITERS2 = 6,
172 GLF_GREEDY = 7,
173};
174
175struct gfs2_glock {
176 struct list_head gl_list;
177 unsigned long gl_flags; /* GLF_... */
178 struct lm_lockname gl_name;
179 struct kref gl_ref;
180
181 spinlock_t gl_spin;
182
183 unsigned int gl_state;
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184 struct task_struct *gl_owner;
185 unsigned long gl_ip;
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186 struct list_head gl_holders;
187 struct list_head gl_waiters1; /* HIF_MUTEX */
188 struct list_head gl_waiters2; /* HIF_DEMOTE, HIF_GREEDY */
189 struct list_head gl_waiters3; /* HIF_PROMOTE */
190
8fb4b536 191 const struct gfs2_glock_operations *gl_ops;
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192
193 struct gfs2_holder *gl_req_gh;
194 gfs2_glop_bh_t gl_req_bh;
195
196 lm_lock_t *gl_lock;
197 char *gl_lvb;
198 atomic_t gl_lvb_count;
199
200 uint64_t gl_vn;
201 unsigned long gl_stamp;
202 void *gl_object;
203
204 struct gfs2_gl_hash_bucket *gl_bucket;
205 struct list_head gl_reclaim;
206
207 struct gfs2_sbd *gl_sbd;
208
209 struct inode *gl_aspace;
210 struct gfs2_log_element gl_le;
211 struct list_head gl_ail_list;
212 atomic_t gl_ail_count;
213};
214
215struct gfs2_alloc {
216 /* Quota stuff */
217
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218 struct gfs2_quota_data *al_qd[4];
219 struct gfs2_holder al_qd_ghs[4];
6b61b072 220 unsigned int al_qd_num;
b3b94faa 221
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222 u32 al_requested; /* Filled in by caller of gfs2_inplace_reserve() */
223 u32 al_alloced; /* Filled in by gfs2_alloc_*() */
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224
225 /* Filled in by gfs2_inplace_reserve() */
226
b3b94faa 227 unsigned int al_line;
6b61b072 228 char *al_file;
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229 struct gfs2_holder al_ri_gh;
230 struct gfs2_holder al_rgd_gh;
231 struct gfs2_rgrpd *al_rgd;
232
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233};
234
235enum {
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236 GIF_QD_LOCKED = 1,
237 GIF_PAGED = 2,
238 GIF_SW_PAGED = 3,
239};
240
241struct gfs2_inode {
320dd101 242 struct inode i_inode;
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243 struct gfs2_inum i_num;
244
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245 unsigned long i_flags; /* GIF_... */
246
247 uint64_t i_vn;
feaa7bba 248 struct gfs2_dinode i_di; /* To be replaced by ref to block */
b3b94faa 249
feaa7bba 250 struct gfs2_glock *i_gl; /* Move into i_gh? */
b3b94faa 251 struct gfs2_holder i_iopen_gh;
f42faf4f 252 struct gfs2_holder i_gh; /* for prepare/commit_write only */
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253 struct gfs2_alloc i_alloc;
254 uint64_t i_last_rg_alloc;
255
256 spinlock_t i_spin;
257 struct rw_semaphore i_rw_mutex;
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258 unsigned int i_greedy;
259 unsigned long i_last_pfault;
260
261 struct buffer_head *i_cache[GFS2_MAX_META_HEIGHT];
262};
263
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264/*
265 * Since i_inode is the first element of struct gfs2_inode,
266 * this is effectively a cast.
267 */
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268static inline struct gfs2_inode *GFS2_I(struct inode *inode)
269{
270 return container_of(inode, struct gfs2_inode, i_inode);
271}
272
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273/* To be removed? */
274static inline struct gfs2_sbd *GFS2_SB(struct inode *inode)
275{
276 return inode->i_sb->s_fs_info;
277}
278
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279enum {
280 GFF_DID_DIRECT_ALLOC = 0,
59a1cc6b 281 GFF_EXLOCK = 1,
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282};
283
284struct gfs2_file {
285 unsigned long f_flags; /* GFF_... */
f55ab26a 286 struct mutex f_fl_mutex;
b3b94faa 287 struct gfs2_holder f_fl_gh;
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288};
289
290struct gfs2_revoke {
291 struct gfs2_log_element rv_le;
292 uint64_t rv_blkno;
293};
294
295struct gfs2_revoke_replay {
296 struct list_head rr_list;
297 uint64_t rr_blkno;
298 unsigned int rr_where;
299};
300
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301enum {
302 QDF_USER = 0,
303 QDF_CHANGE = 1,
304 QDF_LOCKED = 2,
305};
306
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307struct gfs2_quota_lvb {
308 uint32_t qb_magic;
309 uint32_t __pad;
310 uint64_t qb_limit; /* Hard limit of # blocks to alloc */
311 uint64_t qb_warn; /* Warn user when alloc is above this # */
312 int64_t qb_value; /* Current # blocks allocated */
313};
314
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315struct gfs2_quota_data {
316 struct list_head qd_list;
317 unsigned int qd_count;
318
319 uint32_t qd_id;
320 unsigned long qd_flags; /* QDF_... */
321
322 int64_t qd_change;
323 int64_t qd_change_sync;
324
325 unsigned int qd_slot;
326 unsigned int qd_slot_count;
327
328 struct buffer_head *qd_bh;
329 struct gfs2_quota_change *qd_bh_qc;
330 unsigned int qd_bh_count;
331
332 struct gfs2_glock *qd_gl;
333 struct gfs2_quota_lvb qd_qb;
334
335 uint64_t qd_sync_gen;
336 unsigned long qd_last_warn;
337 unsigned long qd_last_touched;
338};
339
340struct gfs2_log_buf {
341 struct list_head lb_list;
342 struct buffer_head *lb_bh;
343 struct buffer_head *lb_real;
344};
345
346struct gfs2_trans {
d0dc80db 347 unsigned long tr_ip;
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348
349 unsigned int tr_blocks;
350 unsigned int tr_revokes;
351 unsigned int tr_reserved;
352
e317ffcb 353 struct gfs2_holder tr_t_gh;
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354
355 int tr_touched;
356
357 unsigned int tr_num_buf;
358 unsigned int tr_num_buf_new;
359 unsigned int tr_num_buf_rm;
360 struct list_head tr_list_buf;
361
362 unsigned int tr_num_revoke;
363 unsigned int tr_num_revoke_rm;
364};
365
366struct gfs2_ail {
367 struct list_head ai_list;
368
369 unsigned int ai_first;
370 struct list_head ai_ail1_list;
371 struct list_head ai_ail2_list;
372
373 uint64_t ai_sync_gen;
374};
375
376struct gfs2_jdesc {
377 struct list_head jd_list;
378
7359a19c 379 struct inode *jd_inode;
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380 unsigned int jd_jid;
381 int jd_dirty;
382
383 unsigned int jd_blocks;
384};
385
386#define GFS2_GLOCKD_DEFAULT 1
387#define GFS2_GLOCKD_MAX 16
388
389#define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF
390#define GFS2_QUOTA_OFF 0
391#define GFS2_QUOTA_ACCOUNT 1
392#define GFS2_QUOTA_ON 2
393
394#define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED
395#define GFS2_DATA_WRITEBACK 1
396#define GFS2_DATA_ORDERED 2
397
398struct gfs2_args {
399 char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
400 char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
401 char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
402 int ar_spectator; /* Don't get a journal because we're always RO */
403 int ar_ignore_local_fs; /* Don't optimize even if local_fs is 1 */
404 int ar_localflocks; /* Let the VFS do flock|fcntl locks for us */
405 int ar_localcaching; /* Local-style caching (dangerous on multihost) */
406 int ar_debug; /* Oops on errors instead of trying to be graceful */
407 int ar_upgrade; /* Upgrade ondisk/multihost format */
408 unsigned int ar_num_glockd; /* Number of glockd threads */
409 int ar_posix_acl; /* Enable posix acls */
410 int ar_quota; /* off/account/on */
411 int ar_suiddir; /* suiddir support */
412 int ar_data; /* ordered/writeback */
413};
414
415struct gfs2_tune {
416 spinlock_t gt_spin;
417
418 unsigned int gt_ilimit;
419 unsigned int gt_ilimit_tries;
420 unsigned int gt_ilimit_min;
421 unsigned int gt_demote_secs; /* Cache retention for unheld glock */
422 unsigned int gt_incore_log_blocks;
423 unsigned int gt_log_flush_secs;
424 unsigned int gt_jindex_refresh_secs; /* Check for new journal index */
425
426 unsigned int gt_scand_secs;
427 unsigned int gt_recoverd_secs;
428 unsigned int gt_logd_secs;
429 unsigned int gt_quotad_secs;
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430
431 unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
432 unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
433 unsigned int gt_quota_scale_num; /* Numerator */
434 unsigned int gt_quota_scale_den; /* Denominator */
435 unsigned int gt_quota_cache_secs;
436 unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
437 unsigned int gt_atime_quantum; /* Min secs between atime updates */
438 unsigned int gt_new_files_jdata;
439 unsigned int gt_new_files_directio;
440 unsigned int gt_max_atomic_write; /* Split big writes into this size */
441 unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
442 unsigned int gt_lockdump_size;
443 unsigned int gt_stall_secs; /* Detects trouble! */
444 unsigned int gt_complain_secs;
445 unsigned int gt_reclaim_limit; /* Max num of glocks in reclaim list */
446 unsigned int gt_entries_per_readdir;
447 unsigned int gt_prefetch_secs; /* Usage window for prefetched glocks */
448 unsigned int gt_greedy_default;
449 unsigned int gt_greedy_quantum;
450 unsigned int gt_greedy_max;
451 unsigned int gt_statfs_quantum;
452 unsigned int gt_statfs_slow;
453};
454
455struct gfs2_gl_hash_bucket {
456 rwlock_t hb_lock;
457 struct list_head hb_list;
458};
459
460enum {
461 SDF_JOURNAL_CHECKED = 0,
462 SDF_JOURNAL_LIVE = 1,
463 SDF_SHUTDOWN = 2,
464 SDF_NOATIME = 3,
465};
466
467#define GFS2_GL_HASH_SHIFT 13
468#define GFS2_GL_HASH_SIZE (1 << GFS2_GL_HASH_SHIFT)
469#define GFS2_GL_HASH_MASK (GFS2_GL_HASH_SIZE - 1)
470#define GFS2_FSNAME_LEN 256
471
472struct gfs2_sbd {
473 struct super_block *sd_vfs;
86384605 474 struct super_block *sd_vfs_meta;
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475 struct kobject sd_kobj;
476 unsigned long sd_flags; /* SDF_... */
477 struct gfs2_sb sd_sb;
478
479 /* Constants computed on mount */
480
481 uint32_t sd_fsb2bb;
482 uint32_t sd_fsb2bb_shift;
483 uint32_t sd_diptrs; /* Number of pointers in a dinode */
484 uint32_t sd_inptrs; /* Number of pointers in a indirect block */
485 uint32_t sd_jbsize; /* Size of a journaled data block */
486 uint32_t sd_hash_bsize; /* sizeof(exhash block) */
487 uint32_t sd_hash_bsize_shift;
488 uint32_t sd_hash_ptrs; /* Number of pointers in a hash block */
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489 uint32_t sd_qc_per_block;
490 uint32_t sd_max_dirres; /* Max blocks needed to add a directory entry */
491 uint32_t sd_max_height; /* Max height of a file's metadata tree */
492 uint64_t sd_heightsize[GFS2_MAX_META_HEIGHT];
493 uint32_t sd_max_jheight; /* Max height of journaled file's meta tree */
494 uint64_t sd_jheightsize[GFS2_MAX_META_HEIGHT];
495
496 struct gfs2_args sd_args; /* Mount arguments */
497 struct gfs2_tune sd_tune; /* Filesystem tuning structure */
498
499 /* Lock Stuff */
500
501 struct lm_lockstruct sd_lockstruct;
502 struct gfs2_gl_hash_bucket sd_gl_hash[GFS2_GL_HASH_SIZE];
503 struct list_head sd_reclaim_list;
504 spinlock_t sd_reclaim_lock;
505 wait_queue_head_t sd_reclaim_wq;
506 atomic_t sd_reclaim_count;
507 struct gfs2_holder sd_live_gh;
508 struct gfs2_glock *sd_rename_gl;
509 struct gfs2_glock *sd_trans_gl;
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DT
510
511 /* Inode Stuff */
512
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513 struct inode *sd_master_dir;
514 struct inode *sd_jindex;
515 struct inode *sd_inum_inode;
516 struct inode *sd_statfs_inode;
517 struct inode *sd_ir_inode;
518 struct inode *sd_sc_inode;
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519 struct inode *sd_qc_inode;
520 struct inode *sd_rindex;
521 struct inode *sd_quota_inode;
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522
523 /* Inum stuff */
524
f55ab26a 525 struct mutex sd_inum_mutex;
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526
527 /* StatFS stuff */
528
529 spinlock_t sd_statfs_spin;
f55ab26a 530 struct mutex sd_statfs_mutex;
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531 struct gfs2_statfs_change sd_statfs_master;
532 struct gfs2_statfs_change sd_statfs_local;
533 unsigned long sd_statfs_sync_time;
534
535 /* Resource group stuff */
536
537 uint64_t sd_rindex_vn;
538 spinlock_t sd_rindex_spin;
f55ab26a 539 struct mutex sd_rindex_mutex;
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DT
540 struct list_head sd_rindex_list;
541 struct list_head sd_rindex_mru_list;
542 struct list_head sd_rindex_recent_list;
543 struct gfs2_rgrpd *sd_rindex_forward;
544 unsigned int sd_rgrps;
545
546 /* Journal index stuff */
547
548 struct list_head sd_jindex_list;
549 spinlock_t sd_jindex_spin;
f55ab26a 550 struct mutex sd_jindex_mutex;
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551 unsigned int sd_journals;
552 unsigned long sd_jindex_refresh_time;
553
554 struct gfs2_jdesc *sd_jdesc;
555 struct gfs2_holder sd_journal_gh;
556 struct gfs2_holder sd_jinode_gh;
557
558 struct gfs2_holder sd_ir_gh;
559 struct gfs2_holder sd_sc_gh;
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560 struct gfs2_holder sd_qc_gh;
561
562 /* Daemon stuff */
563
564 struct task_struct *sd_scand_process;
565 struct task_struct *sd_recoverd_process;
566 struct task_struct *sd_logd_process;
567 struct task_struct *sd_quotad_process;
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568 struct task_struct *sd_glockd_process[GFS2_GLOCKD_MAX];
569 unsigned int sd_glockd_num;
570
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571 /* Quota stuff */
572
573 struct list_head sd_quota_list;
574 atomic_t sd_quota_count;
575 spinlock_t sd_quota_spin;
f55ab26a 576 struct mutex sd_quota_mutex;
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577
578 unsigned int sd_quota_slots;
579 unsigned int sd_quota_chunks;
580 unsigned char **sd_quota_bitmap;
581
582 uint64_t sd_quota_sync_gen;
583 unsigned long sd_quota_sync_time;
584
585 /* Log stuff */
586
587 spinlock_t sd_log_lock;
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588
589 unsigned int sd_log_blks_reserved;
590 unsigned int sd_log_commited_buf;
591 unsigned int sd_log_commited_revoke;
592
593 unsigned int sd_log_num_gl;
594 unsigned int sd_log_num_buf;
595 unsigned int sd_log_num_revoke;
596 unsigned int sd_log_num_rg;
597 unsigned int sd_log_num_databuf;
f42faf4f 598 unsigned int sd_log_num_jdata;
b09e593d 599 unsigned int sd_log_num_hdrs;
f42faf4f 600
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601 struct list_head sd_log_le_gl;
602 struct list_head sd_log_le_buf;
603 struct list_head sd_log_le_revoke;
604 struct list_head sd_log_le_rg;
605 struct list_head sd_log_le_databuf;
606
607 unsigned int sd_log_blks_free;
71b86f56 608 struct mutex sd_log_reserve_mutex;
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609
610 uint64_t sd_log_sequence;
611 unsigned int sd_log_head;
612 unsigned int sd_log_tail;
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613 int sd_log_idle;
614
615 unsigned long sd_log_flush_time;
484adff8 616 struct rw_semaphore sd_log_flush_lock;
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617 struct list_head sd_log_flush_list;
618
619 unsigned int sd_log_flush_head;
620 uint64_t sd_log_flush_wrapped;
621
622 struct list_head sd_ail1_list;
623 struct list_head sd_ail2_list;
624 uint64_t sd_ail_sync_gen;
625
626 /* Replay stuff */
627
628 struct list_head sd_revoke_list;
629 unsigned int sd_replay_tail;
630
631 unsigned int sd_found_blocks;
632 unsigned int sd_found_revokes;
633 unsigned int sd_replayed_blocks;
634
635 /* For quiescing the filesystem */
636
637 struct gfs2_holder sd_freeze_gh;
f55ab26a 638 struct mutex sd_freeze_lock;
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639 unsigned int sd_freeze_count;
640
641 /* Counters */
642
643 atomic_t sd_glock_count;
644 atomic_t sd_glock_held_count;
645 atomic_t sd_inode_count;
b3b94faa 646 atomic_t sd_reclaimed;
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647
648 char sd_fsname[GFS2_FSNAME_LEN];
649 char sd_table_name[GFS2_FSNAME_LEN];
650 char sd_proto_name[GFS2_FSNAME_LEN];
651
652 /* Debugging crud */
653
654 unsigned long sd_last_warning;
86384605 655 struct vfsmount *sd_gfs2mnt;
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656};
657
658#endif /* __INCORE_DOT_H__ */
659