1 /*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
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 version 2.
8 */
9
10 #ifndef __INCORE_DOT_H__
11 #define __INCORE_DOT_H__
12
13 #include <linux/fs.h>
14 #include <linux/kobject.h>
15 #include <linux/workqueue.h>
16 #include <linux/dlm.h>
17 #include <linux/buffer_head.h>
18 #include <linux/rcupdate.h>
19 #include <linux/rculist_bl.h>
20 #include <linux/completion.h>
21 #include <linux/rbtree.h>
22 #include <linux/ktime.h>
23 #include <linux/percpu.h>
24 #include <linux/lockref.h>
25 #include <linux/rhashtable.h>
26
27 #define DIO_WAIT 0x00000010
28 #define DIO_METADATA 0x00000020
29
30 struct gfs2_log_operations;
31 struct gfs2_bufdata;
32 struct gfs2_holder;
33 struct gfs2_glock;
34 struct gfs2_quota_data;
35 struct gfs2_trans;
36 struct gfs2_jdesc;
37 struct gfs2_sbd;
38 struct lm_lockops;
39
40 typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
41
42 struct gfs2_log_header_host {
43 u64 lh_sequence; /* Sequence number of this transaction */
44 u32 lh_flags; /* GFS2_LOG_HEAD_... */
45 u32 lh_tail; /* Block number of log tail */
46 u32 lh_blkno;
47 };
48
49 /*
50 * Structure of operations that are associated with each
51 * type of element in the log.
52 */
53
54 struct gfs2_log_operations {
55 void (*lo_before_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr);
56 void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr);
57 void (*lo_before_scan) (struct gfs2_jdesc *jd,
58 struct gfs2_log_header_host *head, int pass);
59 int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start,
60 struct gfs2_log_descriptor *ld, __be64 *ptr,
61 int pass);
62 void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass);
63 const char *lo_name;
64 };
65
66 #define GBF_FULL 1
67
68 /**
69 * Clone bitmaps (bi_clone):
70 *
71 * - When a block is freed, we remember the previous state of the block in the
72 * clone bitmap, and only mark the block as free in the real bitmap.
73 *
74 * - When looking for a block to allocate, we check for a free block in the
75 * clone bitmap, and if no clone bitmap exists, in the real bitmap.
76 *
77 * - For allocating a block, we mark it as allocated in the real bitmap, and if
78 * a clone bitmap exists, also in the clone bitmap.
79 *
80 * - At the end of a log_flush, we copy the real bitmap into the clone bitmap
81 * to make the clone bitmap reflect the current allocation state.
82 * (Alternatively, we could remove the clone bitmap.)
83 *
84 * The clone bitmaps are in-core only, and is never written to disk.
85 *
86 * These steps ensure that blocks which have been freed in a transaction cannot
87 * be reallocated in that same transaction.
88 */
89 struct gfs2_bitmap {
90 struct buffer_head *bi_bh;
91 char *bi_clone;
92 unsigned long bi_flags;
93 u32 bi_offset;
94 u32 bi_start;
95 u32 bi_len;
96 u32 bi_blocks;
97 };
98
99 struct gfs2_rgrpd {
100 struct rb_node rd_node; /* Link with superblock */
101 struct gfs2_glock *rd_gl; /* Glock for this rgrp */
102 u64 rd_addr; /* grp block disk address */
103 u64 rd_data0; /* first data location */
104 u32 rd_length; /* length of rgrp header in fs blocks */
105 u32 rd_data; /* num of data blocks in rgrp */
106 u32 rd_bitbytes; /* number of bytes in data bitmaps */
107 u32 rd_free;
108 u32 rd_reserved; /* number of blocks reserved */
109 u32 rd_free_clone;
110 u32 rd_dinodes;
111 u64 rd_igeneration;
112 struct gfs2_bitmap *rd_bits;
113 struct gfs2_sbd *rd_sbd;
114 struct gfs2_rgrp_lvb *rd_rgl;
115 u32 rd_last_alloc;
116 u32 rd_flags;
117 u32 rd_extfail_pt; /* extent failure point */
118 #define GFS2_RDF_CHECK 0x10000000 /* check for unlinked inodes */
119 #define GFS2_RDF_UPTODATE 0x20000000 /* rg is up to date */
120 #define GFS2_RDF_ERROR 0x40000000 /* error in rg */
121 #define GFS2_RDF_PREFERRED 0x80000000 /* This rgrp is preferred */
122 #define GFS2_RDF_MASK 0xf0000000 /* mask for internal flags */
123 spinlock_t rd_rsspin; /* protects reservation related vars */
124 struct rb_root rd_rstree; /* multi-block reservation tree */
125 };
126
127 struct gfs2_rbm {
128 struct gfs2_rgrpd *rgd;
129 u32 offset; /* The offset is bitmap relative */
130 int bii; /* Bitmap index */
131 };
132
rbm_bi(const struct gfs2_rbm * rbm)133 static inline struct gfs2_bitmap *rbm_bi(const struct gfs2_rbm *rbm)
134 {
135 return rbm->rgd->rd_bits + rbm->bii;
136 }
137
gfs2_rbm_to_block(const struct gfs2_rbm * rbm)138 static inline u64 gfs2_rbm_to_block(const struct gfs2_rbm *rbm)
139 {
140 BUG_ON(rbm->offset >= rbm->rgd->rd_data);
141 return rbm->rgd->rd_data0 + (rbm_bi(rbm)->bi_start * GFS2_NBBY) +
142 rbm->offset;
143 }
144
gfs2_rbm_eq(const struct gfs2_rbm * rbm1,const struct gfs2_rbm * rbm2)145 static inline bool gfs2_rbm_eq(const struct gfs2_rbm *rbm1,
146 const struct gfs2_rbm *rbm2)
147 {
148 return (rbm1->rgd == rbm2->rgd) && (rbm1->bii == rbm2->bii) &&
149 (rbm1->offset == rbm2->offset);
150 }
151
152 enum gfs2_state_bits {
153 BH_Pinned = BH_PrivateStart,
154 BH_Escaped = BH_PrivateStart + 1,
155 };
156
157 BUFFER_FNS(Pinned, pinned)
158 TAS_BUFFER_FNS(Pinned, pinned)
159 BUFFER_FNS(Escaped, escaped)
160 TAS_BUFFER_FNS(Escaped, escaped)
161
162 struct gfs2_bufdata {
163 struct buffer_head *bd_bh;
164 struct gfs2_glock *bd_gl;
165 u64 bd_blkno;
166
167 struct list_head bd_list;
168 const struct gfs2_log_operations *bd_ops;
169
170 struct gfs2_trans *bd_tr;
171 struct list_head bd_ail_st_list;
172 struct list_head bd_ail_gl_list;
173 };
174
175 /*
176 * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
177 * prefix of lock_dlm_ gets awkward.
178 */
179
180 #define GDLM_STRNAME_BYTES 25
181 #define GDLM_LVB_SIZE 32
182
183 /*
184 * ls_recover_flags:
185 *
186 * DFL_BLOCK_LOCKS: dlm is in recovery and will grant locks that had been
187 * held by failed nodes whose journals need recovery. Those locks should
188 * only be used for journal recovery until the journal recovery is done.
189 * This is set by the dlm recover_prep callback and cleared by the
190 * gfs2_control thread when journal recovery is complete. To avoid
191 * races between recover_prep setting and gfs2_control clearing, recover_spin
192 * is held while changing this bit and reading/writing recover_block
193 * and recover_start.
194 *
195 * DFL_NO_DLM_OPS: dlm lockspace ops/callbacks are not being used.
196 *
197 * DFL_FIRST_MOUNT: this node is the first to mount this fs and is doing
198 * recovery of all journals before allowing other nodes to mount the fs.
199 * This is cleared when FIRST_MOUNT_DONE is set.
200 *
201 * DFL_FIRST_MOUNT_DONE: this node was the first mounter, and has finished
202 * recovery of all journals, and now allows other nodes to mount the fs.
203 *
204 * DFL_MOUNT_DONE: gdlm_mount has completed successfully and cleared
205 * BLOCK_LOCKS for the first time. The gfs2_control thread should now
206 * control clearing BLOCK_LOCKS for further recoveries.
207 *
208 * DFL_UNMOUNT: gdlm_unmount sets to keep sdp off gfs2_control_wq.
209 *
210 * DFL_DLM_RECOVERY: set while dlm is in recovery, between recover_prep()
211 * and recover_done(), i.e. set while recover_block == recover_start.
212 */
213
214 enum {
215 DFL_BLOCK_LOCKS = 0,
216 DFL_NO_DLM_OPS = 1,
217 DFL_FIRST_MOUNT = 2,
218 DFL_FIRST_MOUNT_DONE = 3,
219 DFL_MOUNT_DONE = 4,
220 DFL_UNMOUNT = 5,
221 DFL_DLM_RECOVERY = 6,
222 };
223
224 /*
225 * We are using struct lm_lockname as an rhashtable key. Avoid holes within
226 * the struct; padding at the end is fine.
227 */
228 struct lm_lockname {
229 u64 ln_number;
230 struct gfs2_sbd *ln_sbd;
231 unsigned int ln_type;
232 };
233
234 #define lm_name_equal(name1, name2) \
235 (((name1)->ln_number == (name2)->ln_number) && \
236 ((name1)->ln_type == (name2)->ln_type) && \
237 ((name1)->ln_sbd == (name2)->ln_sbd))
238
239
240 struct gfs2_glock_operations {
241 void (*go_sync) (struct gfs2_glock *gl);
242 int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);
243 void (*go_inval) (struct gfs2_glock *gl, int flags);
244 int (*go_demote_ok) (const struct gfs2_glock *gl);
245 int (*go_lock) (struct gfs2_holder *gh);
246 void (*go_unlock) (struct gfs2_holder *gh);
247 void (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl);
248 void (*go_callback)(struct gfs2_glock *gl, bool remote);
249 const int go_type;
250 const unsigned long go_flags;
251 #define GLOF_ASPACE 1
252 #define GLOF_LVB 2
253 #define GLOF_LRU 4
254 };
255
256 enum {
257 GFS2_LKS_SRTT = 0, /* Non blocking smoothed round trip time */
258 GFS2_LKS_SRTTVAR = 1, /* Non blocking smoothed variance */
259 GFS2_LKS_SRTTB = 2, /* Blocking smoothed round trip time */
260 GFS2_LKS_SRTTVARB = 3, /* Blocking smoothed variance */
261 GFS2_LKS_SIRT = 4, /* Smoothed Inter-request time */
262 GFS2_LKS_SIRTVAR = 5, /* Smoothed Inter-request variance */
263 GFS2_LKS_DCOUNT = 6, /* Count of dlm requests */
264 GFS2_LKS_QCOUNT = 7, /* Count of gfs2_holder queues */
265 GFS2_NR_LKSTATS
266 };
267
268 struct gfs2_lkstats {
269 u64 stats[GFS2_NR_LKSTATS];
270 };
271
272 enum {
273 /* States */
274 HIF_HOLDER = 6, /* Set for gh that "holds" the glock */
275 HIF_FIRST = 7,
276 HIF_WAIT = 10,
277 };
278
279 struct gfs2_holder {
280 struct list_head gh_list;
281
282 struct gfs2_glock *gh_gl;
283 struct pid *gh_owner_pid;
284 u16 gh_flags;
285 u16 gh_state;
286
287 int gh_error;
288 unsigned long gh_iflags; /* HIF_... */
289 unsigned long gh_ip;
290 };
291
292 /* Number of quota types we support */
293 #define GFS2_MAXQUOTAS 2
294
295 struct gfs2_qadata { /* quota allocation data */
296 /* Quota stuff */
297 struct gfs2_quota_data *qa_qd[2 * GFS2_MAXQUOTAS];
298 struct gfs2_holder qa_qd_ghs[2 * GFS2_MAXQUOTAS];
299 unsigned int qa_qd_num;
300 };
301
302 /* Resource group multi-block reservation, in order of appearance:
303
304 Step 1. Function prepares to write, allocates a mb, sets the size hint.
305 Step 2. User calls inplace_reserve to target an rgrp, sets the rgrp info
306 Step 3. Function get_local_rgrp locks the rgrp, determines which bits to use
307 Step 4. Bits are assigned from the rgrp based on either the reservation
308 or wherever it can.
309 */
310
311 struct gfs2_blkreserv {
312 /* components used during write (step 1): */
313 atomic_t rs_sizehint; /* hint of the write size */
314
315 struct gfs2_holder rs_rgd_gh; /* Filled in by get_local_rgrp */
316 struct rb_node rs_node; /* link to other block reservations */
317 struct gfs2_rbm rs_rbm; /* Start of reservation */
318 u32 rs_free; /* how many blocks are still free */
319 };
320
321 /*
322 * Allocation parameters
323 * @target: The number of blocks we'd ideally like to allocate
324 * @aflags: The flags (e.g. Orlov flag)
325 *
326 * The intent is to gradually expand this structure over time in
327 * order to give more information, e.g. alignment, min extent size
328 * to the allocation code.
329 */
330 struct gfs2_alloc_parms {
331 u64 target;
332 u32 min_target;
333 u32 aflags;
334 u64 allowed;
335 };
336
337 enum {
338 GLF_LOCK = 1,
339 GLF_DEMOTE = 3,
340 GLF_PENDING_DEMOTE = 4,
341 GLF_DEMOTE_IN_PROGRESS = 5,
342 GLF_DIRTY = 6,
343 GLF_LFLUSH = 7,
344 GLF_INVALIDATE_IN_PROGRESS = 8,
345 GLF_REPLY_PENDING = 9,
346 GLF_INITIAL = 10,
347 GLF_FROZEN = 11,
348 GLF_QUEUED = 12,
349 GLF_LRU = 13,
350 GLF_OBJECT = 14, /* Used only for tracing */
351 GLF_BLOCKING = 15,
352 GLF_INODE_CREATING = 16, /* Inode creation occurring */
353 };
354
355 struct gfs2_glock {
356 unsigned long gl_flags; /* GLF_... */
357 struct lm_lockname gl_name;
358
359 struct lockref gl_lockref;
360
361 /* State fields protected by gl_lockref.lock */
362 unsigned int gl_state:2, /* Current state */
363 gl_target:2, /* Target state */
364 gl_demote_state:2, /* State requested by remote node */
365 gl_req:2, /* State in last dlm request */
366 gl_reply:8; /* Last reply from the dlm */
367
368 unsigned long gl_demote_time; /* time of first demote request */
369 long gl_hold_time;
370 struct list_head gl_holders;
371
372 const struct gfs2_glock_operations *gl_ops;
373 ktime_t gl_dstamp;
374 struct gfs2_lkstats gl_stats;
375 struct dlm_lksb gl_lksb;
376 unsigned long gl_tchange;
377 void *gl_object;
378
379 struct list_head gl_lru;
380 struct list_head gl_ail_list;
381 atomic_t gl_ail_count;
382 atomic_t gl_revokes;
383 struct delayed_work gl_work;
384 union {
385 /* For inode and iopen glocks only */
386 struct work_struct gl_delete;
387 /* For rgrp glocks only */
388 struct {
389 loff_t start;
390 loff_t end;
391 } gl_vm;
392 };
393 struct rcu_head gl_rcu;
394 struct rhash_head gl_node;
395 };
396
397 #define GFS2_MIN_LVB_SIZE 32 /* Min size of LVB that gfs2 supports */
398
399 enum {
400 GIF_INVALID = 0,
401 GIF_QD_LOCKED = 1,
402 GIF_ALLOC_FAILED = 2,
403 GIF_SW_PAGED = 3,
404 GIF_ORDERED = 4,
405 GIF_FREE_VFS_INODE = 5,
406 GIF_GLOP_PENDING = 6,
407 };
408
409 struct gfs2_inode {
410 struct inode i_inode;
411 u64 i_no_addr;
412 u64 i_no_formal_ino;
413 u64 i_generation;
414 u64 i_eattr;
415 unsigned long i_flags; /* GIF_... */
416 struct gfs2_glock *i_gl; /* Move into i_gh? */
417 struct gfs2_holder i_iopen_gh;
418 struct gfs2_holder i_gh; /* for prepare/commit_write only */
419 struct gfs2_qadata *i_qadata; /* quota allocation data */
420 struct gfs2_blkreserv i_res; /* rgrp multi-block reservation */
421 u64 i_goal; /* goal block for allocations */
422 struct rw_semaphore i_rw_mutex;
423 struct list_head i_ordered;
424 struct list_head i_trunc_list;
425 __be64 *i_hash_cache;
426 u32 i_entries;
427 u32 i_diskflags;
428 u8 i_height;
429 u8 i_depth;
430 u16 i_rahead;
431 };
432
433 /*
434 * Since i_inode is the first element of struct gfs2_inode,
435 * this is effectively a cast.
436 */
GFS2_I(struct inode * inode)437 static inline struct gfs2_inode *GFS2_I(struct inode *inode)
438 {
439 return container_of(inode, struct gfs2_inode, i_inode);
440 }
441
GFS2_SB(const struct inode * inode)442 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
443 {
444 return inode->i_sb->s_fs_info;
445 }
446
447 struct gfs2_file {
448 struct mutex f_fl_mutex;
449 struct gfs2_holder f_fl_gh;
450 };
451
452 struct gfs2_revoke_replay {
453 struct list_head rr_list;
454 u64 rr_blkno;
455 unsigned int rr_where;
456 };
457
458 enum {
459 QDF_CHANGE = 1,
460 QDF_LOCKED = 2,
461 QDF_REFRESH = 3,
462 QDF_QMSG_QUIET = 4,
463 };
464
465 struct gfs2_quota_data {
466 struct hlist_bl_node qd_hlist;
467 struct list_head qd_list;
468 struct kqid qd_id;
469 struct gfs2_sbd *qd_sbd;
470 struct lockref qd_lockref;
471 struct list_head qd_lru;
472 unsigned qd_hash;
473
474 unsigned long qd_flags; /* QDF_... */
475
476 s64 qd_change;
477 s64 qd_change_sync;
478
479 unsigned int qd_slot;
480 unsigned int qd_slot_count;
481
482 struct buffer_head *qd_bh;
483 struct gfs2_quota_change *qd_bh_qc;
484 unsigned int qd_bh_count;
485
486 struct gfs2_glock *qd_gl;
487 struct gfs2_quota_lvb qd_qb;
488
489 u64 qd_sync_gen;
490 unsigned long qd_last_warn;
491 struct rcu_head qd_rcu;
492 };
493
494 enum {
495 TR_TOUCHED = 1,
496 TR_ATTACHED = 2,
497 TR_ALLOCED = 3,
498 };
499
500 struct gfs2_trans {
501 unsigned long tr_ip;
502
503 unsigned int tr_blocks;
504 unsigned int tr_revokes;
505 unsigned int tr_reserved;
506 unsigned long tr_flags;
507
508 unsigned int tr_num_buf_new;
509 unsigned int tr_num_databuf_new;
510 unsigned int tr_num_buf_rm;
511 unsigned int tr_num_databuf_rm;
512 unsigned int tr_num_revoke;
513 unsigned int tr_num_revoke_rm;
514
515 struct list_head tr_list;
516 struct list_head tr_databuf;
517 struct list_head tr_buf;
518
519 unsigned int tr_first;
520 struct list_head tr_ail1_list;
521 struct list_head tr_ail2_list;
522 };
523
524 struct gfs2_journal_extent {
525 struct list_head list;
526
527 unsigned int lblock; /* First logical block */
528 u64 dblock; /* First disk block */
529 u64 blocks;
530 };
531
532 struct gfs2_jdesc {
533 struct list_head jd_list;
534 struct list_head extent_list;
535 unsigned int nr_extents;
536 struct work_struct jd_work;
537 struct inode *jd_inode;
538 unsigned long jd_flags;
539 #define JDF_RECOVERY 1
540 unsigned int jd_jid;
541 unsigned int jd_blocks;
542 int jd_recover_error;
543 /* Replay stuff */
544
545 unsigned int jd_found_blocks;
546 unsigned int jd_found_revokes;
547 unsigned int jd_replayed_blocks;
548
549 struct list_head jd_revoke_list;
550 unsigned int jd_replay_tail;
551
552 };
553
554 struct gfs2_statfs_change_host {
555 s64 sc_total;
556 s64 sc_free;
557 s64 sc_dinodes;
558 };
559
560 #define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF
561 #define GFS2_QUOTA_OFF 0
562 #define GFS2_QUOTA_ACCOUNT 1
563 #define GFS2_QUOTA_ON 2
564
565 #define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED
566 #define GFS2_DATA_WRITEBACK 1
567 #define GFS2_DATA_ORDERED 2
568
569 #define GFS2_ERRORS_DEFAULT GFS2_ERRORS_WITHDRAW
570 #define GFS2_ERRORS_WITHDRAW 0
571 #define GFS2_ERRORS_CONTINUE 1 /* place holder for future feature */
572 #define GFS2_ERRORS_RO 2 /* place holder for future feature */
573 #define GFS2_ERRORS_PANIC 3
574
575 struct gfs2_args {
576 char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
577 char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
578 char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
579 unsigned int ar_spectator:1; /* Don't get a journal */
580 unsigned int ar_localflocks:1; /* Let the VFS do flock|fcntl */
581 unsigned int ar_debug:1; /* Oops on errors */
582 unsigned int ar_posix_acl:1; /* Enable posix acls */
583 unsigned int ar_quota:2; /* off/account/on */
584 unsigned int ar_suiddir:1; /* suiddir support */
585 unsigned int ar_data:2; /* ordered/writeback */
586 unsigned int ar_meta:1; /* mount metafs */
587 unsigned int ar_discard:1; /* discard requests */
588 unsigned int ar_errors:2; /* errors=withdraw | panic */
589 unsigned int ar_nobarrier:1; /* do not send barriers */
590 unsigned int ar_rgrplvb:1; /* use lvbs for rgrp info */
591 unsigned int ar_loccookie:1; /* use location based readdir
592 cookies */
593 int ar_commit; /* Commit interval */
594 int ar_statfs_quantum; /* The fast statfs interval */
595 int ar_quota_quantum; /* The quota interval */
596 int ar_statfs_percent; /* The % change to force sync */
597 };
598
599 struct gfs2_tune {
600 spinlock_t gt_spin;
601
602 unsigned int gt_logd_secs;
603
604 unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
605 unsigned int gt_quota_scale_num; /* Numerator */
606 unsigned int gt_quota_scale_den; /* Denominator */
607 unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
608 unsigned int gt_new_files_jdata;
609 unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
610 unsigned int gt_complain_secs;
611 unsigned int gt_statfs_quantum;
612 unsigned int gt_statfs_slow;
613 };
614
615 enum {
616 SDF_JOURNAL_CHECKED = 0,
617 SDF_JOURNAL_LIVE = 1,
618 SDF_SHUTDOWN = 2,
619 SDF_NOBARRIERS = 3,
620 SDF_NORECOVERY = 4,
621 SDF_DEMOTE = 5,
622 SDF_NOJOURNALID = 6,
623 SDF_RORECOVERY = 7, /* read only recovery */
624 SDF_SKIP_DLM_UNLOCK = 8,
625 SDF_FORCE_AIL_FLUSH = 9,
626 SDF_AIL1_IO_ERROR = 10,
627 };
628
629 enum gfs2_freeze_state {
630 SFS_UNFROZEN = 0,
631 SFS_STARTING_FREEZE = 1,
632 SFS_FROZEN = 2,
633 };
634
635 #define GFS2_FSNAME_LEN 256
636
637 struct gfs2_inum_host {
638 u64 no_formal_ino;
639 u64 no_addr;
640 };
641
642 struct gfs2_sb_host {
643 u32 sb_magic;
644 u32 sb_type;
645 u32 sb_format;
646
647 u32 sb_fs_format;
648 u32 sb_multihost_format;
649 u32 sb_bsize;
650 u32 sb_bsize_shift;
651
652 struct gfs2_inum_host sb_master_dir;
653 struct gfs2_inum_host sb_root_dir;
654
655 char sb_lockproto[GFS2_LOCKNAME_LEN];
656 char sb_locktable[GFS2_LOCKNAME_LEN];
657 };
658
659 /*
660 * lm_mount() return values
661 *
662 * ls_jid - the journal ID this node should use
663 * ls_first - this node is the first to mount the file system
664 * ls_lockspace - lock module's context for this file system
665 * ls_ops - lock module's functions
666 */
667
668 struct lm_lockstruct {
669 int ls_jid;
670 unsigned int ls_first;
671 const struct lm_lockops *ls_ops;
672 dlm_lockspace_t *ls_dlm;
673
674 int ls_recover_jid_done; /* These two are deprecated, */
675 int ls_recover_jid_status; /* used previously by gfs_controld */
676
677 struct dlm_lksb ls_mounted_lksb; /* mounted_lock */
678 struct dlm_lksb ls_control_lksb; /* control_lock */
679 char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */
680 struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */
681 char *ls_lvb_bits;
682
683 spinlock_t ls_recover_spin; /* protects following fields */
684 unsigned long ls_recover_flags; /* DFL_ */
685 uint32_t ls_recover_mount; /* gen in first recover_done cb */
686 uint32_t ls_recover_start; /* gen in last recover_done cb */
687 uint32_t ls_recover_block; /* copy recover_start in last recover_prep */
688 uint32_t ls_recover_size; /* size of recover_submit, recover_result */
689 uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */
690 uint32_t *ls_recover_result; /* result of last jid recovery */
691 };
692
693 struct gfs2_pcpu_lkstats {
694 /* One struct for each glock type */
695 struct gfs2_lkstats lkstats[10];
696 };
697
698 struct gfs2_sbd {
699 struct super_block *sd_vfs;
700 struct gfs2_pcpu_lkstats __percpu *sd_lkstats;
701 struct kobject sd_kobj;
702 unsigned long sd_flags; /* SDF_... */
703 struct gfs2_sb_host sd_sb;
704
705 /* Constants computed on mount */
706
707 u32 sd_fsb2bb;
708 u32 sd_fsb2bb_shift;
709 u32 sd_diptrs; /* Number of pointers in a dinode */
710 u32 sd_inptrs; /* Number of pointers in a indirect block */
711 u32 sd_jbsize; /* Size of a journaled data block */
712 u32 sd_hash_bsize; /* sizeof(exhash block) */
713 u32 sd_hash_bsize_shift;
714 u32 sd_hash_ptrs; /* Number of pointers in a hash block */
715 u32 sd_qc_per_block;
716 u32 sd_blocks_per_bitmap;
717 u32 sd_max_dirres; /* Max blocks needed to add a directory entry */
718 u32 sd_max_height; /* Max height of a file's metadata tree */
719 u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
720 u32 sd_max_dents_per_leaf; /* Max number of dirents in a leaf block */
721
722 struct gfs2_args sd_args; /* Mount arguments */
723 struct gfs2_tune sd_tune; /* Filesystem tuning structure */
724
725 /* Lock Stuff */
726
727 struct lm_lockstruct sd_lockstruct;
728 struct gfs2_holder sd_live_gh;
729 struct gfs2_glock *sd_rename_gl;
730 struct gfs2_glock *sd_freeze_gl;
731 struct work_struct sd_freeze_work;
732 wait_queue_head_t sd_glock_wait;
733 atomic_t sd_glock_disposal;
734 struct completion sd_locking_init;
735 struct completion sd_wdack;
736 struct delayed_work sd_control_work;
737
738 /* Inode Stuff */
739
740 struct dentry *sd_master_dir;
741 struct dentry *sd_root_dir;
742
743 struct inode *sd_jindex;
744 struct inode *sd_statfs_inode;
745 struct inode *sd_sc_inode;
746 struct inode *sd_qc_inode;
747 struct inode *sd_rindex;
748 struct inode *sd_quota_inode;
749
750 /* StatFS stuff */
751
752 spinlock_t sd_statfs_spin;
753 struct gfs2_statfs_change_host sd_statfs_master;
754 struct gfs2_statfs_change_host sd_statfs_local;
755 int sd_statfs_force_sync;
756
757 /* Resource group stuff */
758
759 int sd_rindex_uptodate;
760 spinlock_t sd_rindex_spin;
761 struct rb_root sd_rindex_tree;
762 unsigned int sd_rgrps;
763 unsigned int sd_max_rg_data;
764
765 /* Journal index stuff */
766
767 struct list_head sd_jindex_list;
768 spinlock_t sd_jindex_spin;
769 struct mutex sd_jindex_mutex;
770 unsigned int sd_journals;
771
772 struct gfs2_jdesc *sd_jdesc;
773 struct gfs2_holder sd_journal_gh;
774 struct gfs2_holder sd_jinode_gh;
775
776 struct gfs2_holder sd_sc_gh;
777 struct gfs2_holder sd_qc_gh;
778
779 struct completion sd_journal_ready;
780
781 /* Daemon stuff */
782
783 struct task_struct *sd_logd_process;
784 struct task_struct *sd_quotad_process;
785
786 /* Quota stuff */
787
788 struct list_head sd_quota_list;
789 atomic_t sd_quota_count;
790 struct mutex sd_quota_mutex;
791 struct mutex sd_quota_sync_mutex;
792 wait_queue_head_t sd_quota_wait;
793 struct list_head sd_trunc_list;
794 spinlock_t sd_trunc_lock;
795
796 unsigned int sd_quota_slots;
797 unsigned long *sd_quota_bitmap;
798 spinlock_t sd_bitmap_lock;
799
800 u64 sd_quota_sync_gen;
801
802 /* Log stuff */
803
804 struct address_space sd_aspace;
805
806 spinlock_t sd_log_lock;
807
808 struct gfs2_trans *sd_log_tr;
809 unsigned int sd_log_blks_reserved;
810 int sd_log_commited_revoke;
811
812 atomic_t sd_log_pinned;
813 unsigned int sd_log_num_revoke;
814
815 struct list_head sd_log_le_revoke;
816 struct list_head sd_log_le_ordered;
817 spinlock_t sd_ordered_lock;
818
819 atomic_t sd_log_thresh1;
820 atomic_t sd_log_thresh2;
821 atomic_t sd_log_blks_free;
822 atomic_t sd_log_blks_needed;
823 wait_queue_head_t sd_log_waitq;
824 wait_queue_head_t sd_logd_waitq;
825
826 u64 sd_log_sequence;
827 unsigned int sd_log_head;
828 unsigned int sd_log_tail;
829 int sd_log_idle;
830
831 struct rw_semaphore sd_log_flush_lock;
832 atomic_t sd_log_in_flight;
833 struct bio *sd_log_bio;
834 wait_queue_head_t sd_log_flush_wait;
835 int sd_log_error;
836
837 atomic_t sd_reserving_log;
838 wait_queue_head_t sd_reserving_log_wait;
839
840 unsigned int sd_log_flush_head;
841
842 spinlock_t sd_ail_lock;
843 struct list_head sd_ail1_list;
844 struct list_head sd_ail2_list;
845
846 /* For quiescing the filesystem */
847 struct gfs2_holder sd_freeze_gh;
848 atomic_t sd_freeze_state;
849 struct mutex sd_freeze_mutex;
850
851 char sd_fsname[GFS2_FSNAME_LEN + 3 * sizeof(int) + 2];
852 char sd_table_name[GFS2_FSNAME_LEN];
853 char sd_proto_name[GFS2_FSNAME_LEN];
854
855 /* Debugging crud */
856
857 unsigned long sd_last_warning;
858 struct dentry *debugfs_dir; /* debugfs directory */
859 struct dentry *debugfs_dentry_glocks;
860 struct dentry *debugfs_dentry_glstats;
861 struct dentry *debugfs_dentry_sbstats;
862 };
863
gfs2_glstats_inc(struct gfs2_glock * gl,int which)864 static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which)
865 {
866 gl->gl_stats.stats[which]++;
867 }
868
gfs2_sbstats_inc(const struct gfs2_glock * gl,int which)869 static inline void gfs2_sbstats_inc(const struct gfs2_glock *gl, int which)
870 {
871 const struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
872 preempt_disable();
873 this_cpu_ptr(sdp->sd_lkstats)->lkstats[gl->gl_name.ln_type].stats[which]++;
874 preempt_enable();
875 }
876
877 extern struct gfs2_rgrpd *gfs2_glock2rgrp(struct gfs2_glock *gl);
878
gfs2_max_stuffed_size(const struct gfs2_inode * ip)879 static inline unsigned gfs2_max_stuffed_size(const struct gfs2_inode *ip)
880 {
881 return GFS2_SB(&ip->i_inode)->sd_sb.sb_bsize - sizeof(struct gfs2_dinode);
882 }
883
884 #endif /* __INCORE_DOT_H__ */
885
886