1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
4 * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
5 */
6
7 #ifndef __INCORE_DOT_H__
8 #define __INCORE_DOT_H__
9
10 #include <linux/fs.h>
11 #include <linux/kobject.h>
12 #include <linux/workqueue.h>
13 #include <linux/dlm.h>
14 #include <linux/buffer_head.h>
15 #include <linux/rcupdate.h>
16 #include <linux/rculist_bl.h>
17 #include <linux/completion.h>
18 #include <linux/rbtree.h>
19 #include <linux/ktime.h>
20 #include <linux/percpu.h>
21 #include <linux/lockref.h>
22 #include <linux/rhashtable.h>
23
24 #define DIO_WAIT 0x00000010
25 #define DIO_METADATA 0x00000020
26
27 struct gfs2_log_operations;
28 struct gfs2_bufdata;
29 struct gfs2_holder;
30 struct gfs2_glock;
31 struct gfs2_quota_data;
32 struct gfs2_trans;
33 struct gfs2_jdesc;
34 struct gfs2_sbd;
35 struct lm_lockops;
36
37 typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
38
39 struct gfs2_log_header_host {
40 u64 lh_sequence; /* Sequence number of this transaction */
41 u32 lh_flags; /* GFS2_LOG_HEAD_... */
42 u32 lh_tail; /* Block number of log tail */
43 u32 lh_blkno;
44
45 s64 lh_local_total;
46 s64 lh_local_free;
47 s64 lh_local_dinodes;
48 };
49
50 /*
51 * Structure of operations that are associated with each
52 * type of element in the log.
53 */
54
55 struct gfs2_log_operations {
56 void (*lo_before_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr);
57 void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr);
58 void (*lo_before_scan) (struct gfs2_jdesc *jd,
59 struct gfs2_log_header_host *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);
64 const char *lo_name;
65 };
66
67 #define GBF_FULL 1
68
69 /**
70 * Clone bitmaps (bi_clone):
71 *
72 * - When a block is freed, we remember the previous state of the block in the
73 * clone bitmap, and only mark the block as free in the real bitmap.
74 *
75 * - When looking for a block to allocate, we check for a free block in the
76 * clone bitmap, and if no clone bitmap exists, in the real bitmap.
77 *
78 * - For allocating a block, we mark it as allocated in the real bitmap, and if
79 * a clone bitmap exists, also in the clone bitmap.
80 *
81 * - At the end of a log_flush, we copy the real bitmap into the clone bitmap
82 * to make the clone bitmap reflect the current allocation state.
83 * (Alternatively, we could remove the clone bitmap.)
84 *
85 * The clone bitmaps are in-core only, and is never written to disk.
86 *
87 * These steps ensure that blocks which have been freed in a transaction cannot
88 * be reallocated in that same transaction.
89 */
90 struct gfs2_bitmap {
91 struct buffer_head *bi_bh;
92 char *bi_clone;
93 unsigned long bi_flags;
94 u32 bi_offset;
95 u32 bi_start;
96 u32 bi_bytes;
97 u32 bi_blocks;
98 };
99
100 struct gfs2_rgrpd {
101 struct rb_node rd_node; /* Link with superblock */
102 struct gfs2_glock *rd_gl; /* Glock for this rgrp */
103 u64 rd_addr; /* grp block disk address */
104 u64 rd_data0; /* first data location */
105 u32 rd_length; /* length of rgrp header in fs blocks */
106 u32 rd_data; /* num of data blocks in rgrp */
107 u32 rd_bitbytes; /* number of bytes in data bitmaps */
108 u32 rd_free;
109 u32 rd_reserved; /* number of blocks reserved */
110 u32 rd_free_clone;
111 u32 rd_dinodes;
112 u64 rd_igeneration;
113 struct gfs2_bitmap *rd_bits;
114 struct gfs2_sbd *rd_sbd;
115 struct gfs2_rgrp_lvb *rd_rgl;
116 u32 rd_last_alloc;
117 u32 rd_flags;
118 u32 rd_extfail_pt; /* extent failure point */
119 #define GFS2_RDF_CHECK 0x10000000 /* check for unlinked inodes */
120 #define GFS2_RDF_UPTODATE 0x20000000 /* rg is up to date */
121 #define GFS2_RDF_ERROR 0x40000000 /* error in rg */
122 #define GFS2_RDF_PREFERRED 0x80000000 /* This rgrp is preferred */
123 #define GFS2_RDF_MASK 0xf0000000 /* mask for internal flags */
124 spinlock_t rd_rsspin; /* protects reservation related vars */
125 struct rb_root rd_rstree; /* multi-block reservation tree */
126 };
127
128 struct gfs2_rbm {
129 struct gfs2_rgrpd *rgd;
130 u32 offset; /* The offset is bitmap relative */
131 int bii; /* Bitmap index */
132 };
133
rbm_bi(const struct gfs2_rbm * rbm)134 static inline struct gfs2_bitmap *rbm_bi(const struct gfs2_rbm *rbm)
135 {
136 return rbm->rgd->rd_bits + rbm->bii;
137 }
138
gfs2_rbm_to_block(const struct gfs2_rbm * rbm)139 static inline u64 gfs2_rbm_to_block(const struct gfs2_rbm *rbm)
140 {
141 BUG_ON(rbm->offset >= rbm->rgd->rd_data);
142 return rbm->rgd->rd_data0 + (rbm_bi(rbm)->bi_start * GFS2_NBBY) +
143 rbm->offset;
144 }
145
gfs2_rbm_eq(const struct gfs2_rbm * rbm1,const struct gfs2_rbm * rbm2)146 static inline bool gfs2_rbm_eq(const struct gfs2_rbm *rbm1,
147 const struct gfs2_rbm *rbm2)
148 {
149 return (rbm1->rgd == rbm2->rgd) && (rbm1->bii == rbm2->bii) &&
150 (rbm1->offset == rbm2->offset);
151 }
152
153 enum gfs2_state_bits {
154 BH_Pinned = BH_PrivateStart,
155 BH_Escaped = BH_PrivateStart + 1,
156 };
157
158 BUFFER_FNS(Pinned, pinned)
159 TAS_BUFFER_FNS(Pinned, pinned)
160 BUFFER_FNS(Escaped, escaped)
161 TAS_BUFFER_FNS(Escaped, escaped)
162
163 struct gfs2_bufdata {
164 struct buffer_head *bd_bh;
165 struct gfs2_glock *bd_gl;
166 u64 bd_blkno;
167
168 struct list_head bd_list;
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 int (*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_dump)(struct seq_file *seq, struct gfs2_glock *gl,
247 const char *fs_id_buf);
248 void (*go_callback)(struct gfs2_glock *gl, bool remote);
249 void (*go_free)(struct gfs2_glock *gl);
250 const int go_subclass;
251 const int go_type;
252 const unsigned long go_flags;
253 #define GLOF_ASPACE 1 /* address space attached */
254 #define GLOF_LVB 2 /* Lock Value Block attached */
255 #define GLOF_LRU 4 /* LRU managed */
256 #define GLOF_NONDISK 8 /* not I/O related */
257 };
258
259 enum {
260 GFS2_LKS_SRTT = 0, /* Non blocking smoothed round trip time */
261 GFS2_LKS_SRTTVAR = 1, /* Non blocking smoothed variance */
262 GFS2_LKS_SRTTB = 2, /* Blocking smoothed round trip time */
263 GFS2_LKS_SRTTVARB = 3, /* Blocking smoothed variance */
264 GFS2_LKS_SIRT = 4, /* Smoothed Inter-request time */
265 GFS2_LKS_SIRTVAR = 5, /* Smoothed Inter-request variance */
266 GFS2_LKS_DCOUNT = 6, /* Count of dlm requests */
267 GFS2_LKS_QCOUNT = 7, /* Count of gfs2_holder queues */
268 GFS2_NR_LKSTATS
269 };
270
271 struct gfs2_lkstats {
272 u64 stats[GFS2_NR_LKSTATS];
273 };
274
275 enum {
276 /* States */
277 HIF_HOLDER = 6, /* Set for gh that "holds" the glock */
278 HIF_FIRST = 7,
279 HIF_WAIT = 10,
280 };
281
282 struct gfs2_holder {
283 struct list_head gh_list;
284
285 struct gfs2_glock *gh_gl;
286 struct pid *gh_owner_pid;
287 u16 gh_flags;
288 u16 gh_state;
289
290 int gh_error;
291 unsigned long gh_iflags; /* HIF_... */
292 unsigned long gh_ip;
293 };
294
295 /* Number of quota types we support */
296 #define GFS2_MAXQUOTAS 2
297
298 struct gfs2_qadata { /* quota allocation data */
299 /* Quota stuff */
300 struct gfs2_quota_data *qa_qd[2 * GFS2_MAXQUOTAS];
301 struct gfs2_holder qa_qd_ghs[2 * GFS2_MAXQUOTAS];
302 unsigned int qa_qd_num;
303 int qa_ref;
304 };
305
306 /* Resource group multi-block reservation, in order of appearance:
307
308 Step 1. Function prepares to write, allocates a mb, sets the size hint.
309 Step 2. User calls inplace_reserve to target an rgrp, sets the rgrp info
310 Step 3. Function get_local_rgrp locks the rgrp, determines which bits to use
311 Step 4. Bits are assigned from the rgrp based on either the reservation
312 or wherever it can.
313 */
314
315 struct gfs2_blkreserv {
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_LRU = 13,
349 GLF_OBJECT = 14, /* Used only for tracing */
350 GLF_BLOCKING = 15,
351 GLF_INODE_CREATING = 16, /* Inode creation occurring */
352 GLF_PENDING_DELETE = 17,
353 GLF_FREEING = 18, /* Wait for glock to be freed */
354 };
355
356 struct gfs2_glock {
357 unsigned long gl_flags; /* GLF_... */
358 struct lm_lockname gl_name;
359
360 struct lockref gl_lockref;
361
362 /* State fields protected by gl_lockref.lock */
363 unsigned int gl_state:2, /* Current state */
364 gl_target:2, /* Target state */
365 gl_demote_state:2, /* State requested by remote node */
366 gl_req:2, /* State in last dlm request */
367 gl_reply:8; /* Last reply from the dlm */
368
369 unsigned long gl_demote_time; /* time of first demote request */
370 long gl_hold_time;
371 struct list_head gl_holders;
372
373 const struct gfs2_glock_operations *gl_ops;
374 ktime_t gl_dstamp;
375 struct gfs2_lkstats gl_stats;
376 struct dlm_lksb gl_lksb;
377 unsigned long gl_tchange;
378 void *gl_object;
379
380 struct list_head gl_lru;
381 struct list_head gl_ail_list;
382 atomic_t gl_ail_count;
383 atomic_t gl_revokes;
384 struct delayed_work gl_work;
385 /* For iopen glocks only */
386 struct {
387 struct delayed_work gl_delete;
388 u64 gl_no_formal_ino;
389 };
390 struct rcu_head gl_rcu;
391 struct rhash_head gl_node;
392 };
393
394 enum {
395 GIF_INVALID = 0,
396 GIF_QD_LOCKED = 1,
397 GIF_ALLOC_FAILED = 2,
398 GIF_SW_PAGED = 3,
399 GIF_FREE_VFS_INODE = 5,
400 GIF_GLOP_PENDING = 6,
401 GIF_DEFERRED_DELETE = 7,
402 };
403
404 struct gfs2_inode {
405 struct inode i_inode;
406 u64 i_no_addr;
407 u64 i_no_formal_ino;
408 u64 i_generation;
409 u64 i_eattr;
410 unsigned long i_flags; /* GIF_... */
411 struct gfs2_glock *i_gl; /* Move into i_gh? */
412 struct gfs2_holder i_iopen_gh;
413 struct gfs2_holder i_gh; /* for prepare/commit_write only */
414 struct gfs2_qadata *i_qadata; /* quota allocation data */
415 struct gfs2_holder i_rgd_gh;
416 struct gfs2_blkreserv i_res; /* rgrp multi-block reservation */
417 u64 i_goal; /* goal block for allocations */
418 atomic_t i_sizehint; /* hint of the write size */
419 struct rw_semaphore i_rw_mutex;
420 struct list_head i_ordered;
421 struct list_head i_trunc_list;
422 __be64 *i_hash_cache;
423 u32 i_entries;
424 u32 i_diskflags;
425 u8 i_height;
426 u8 i_depth;
427 u16 i_rahead;
428 };
429
430 /*
431 * Since i_inode is the first element of struct gfs2_inode,
432 * this is effectively a cast.
433 */
GFS2_I(struct inode * inode)434 static inline struct gfs2_inode *GFS2_I(struct inode *inode)
435 {
436 return container_of(inode, struct gfs2_inode, i_inode);
437 }
438
GFS2_SB(const struct inode * inode)439 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
440 {
441 return inode->i_sb->s_fs_info;
442 }
443
444 struct gfs2_file {
445 struct mutex f_fl_mutex;
446 struct gfs2_holder f_fl_gh;
447 };
448
449 struct gfs2_revoke_replay {
450 struct list_head rr_list;
451 u64 rr_blkno;
452 unsigned int rr_where;
453 };
454
455 enum {
456 QDF_CHANGE = 1,
457 QDF_LOCKED = 2,
458 QDF_REFRESH = 3,
459 QDF_QMSG_QUIET = 4,
460 };
461
462 struct gfs2_quota_data {
463 struct hlist_bl_node qd_hlist;
464 struct list_head qd_list;
465 struct kqid qd_id;
466 struct gfs2_sbd *qd_sbd;
467 struct lockref qd_lockref;
468 struct list_head qd_lru;
469 unsigned qd_hash;
470
471 unsigned long qd_flags; /* QDF_... */
472
473 s64 qd_change;
474 s64 qd_change_sync;
475
476 unsigned int qd_slot;
477 unsigned int qd_slot_count;
478
479 struct buffer_head *qd_bh;
480 struct gfs2_quota_change *qd_bh_qc;
481 unsigned int qd_bh_count;
482
483 struct gfs2_glock *qd_gl;
484 struct gfs2_quota_lvb qd_qb;
485
486 u64 qd_sync_gen;
487 unsigned long qd_last_warn;
488 struct rcu_head qd_rcu;
489 };
490
491 enum {
492 TR_TOUCHED = 1,
493 TR_ATTACHED = 2,
494 TR_ALLOCED = 3,
495 };
496
497 struct gfs2_trans {
498 unsigned long tr_ip;
499
500 unsigned int tr_blocks;
501 unsigned int tr_revokes;
502 unsigned int tr_reserved;
503 unsigned long tr_flags;
504
505 unsigned int tr_num_buf_new;
506 unsigned int tr_num_databuf_new;
507 unsigned int tr_num_buf_rm;
508 unsigned int tr_num_databuf_rm;
509 unsigned int tr_num_revoke;
510 unsigned int tr_num_revoke_rm;
511
512 struct list_head tr_list;
513 struct list_head tr_databuf;
514 struct list_head tr_buf;
515
516 unsigned int tr_first;
517 struct list_head tr_ail1_list;
518 struct list_head tr_ail2_list;
519 };
520
521 struct gfs2_journal_extent {
522 struct list_head list;
523
524 unsigned int lblock; /* First logical block */
525 u64 dblock; /* First disk block */
526 u64 blocks;
527 };
528
529 struct gfs2_jdesc {
530 struct list_head jd_list;
531 struct list_head extent_list;
532 unsigned int nr_extents;
533 struct work_struct jd_work;
534 struct inode *jd_inode;
535 unsigned long jd_flags;
536 #define JDF_RECOVERY 1
537 unsigned int jd_jid;
538 u32 jd_blocks;
539 int jd_recover_error;
540 /* Replay stuff */
541
542 unsigned int jd_found_blocks;
543 unsigned int jd_found_revokes;
544 unsigned int jd_replayed_blocks;
545
546 struct list_head jd_revoke_list;
547 unsigned int jd_replay_tail;
548
549 u64 jd_no_addr;
550 };
551
552 struct gfs2_statfs_change_host {
553 s64 sc_total;
554 s64 sc_free;
555 s64 sc_dinodes;
556 };
557
558 #define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF
559 #define GFS2_QUOTA_OFF 0
560 #define GFS2_QUOTA_ACCOUNT 1
561 #define GFS2_QUOTA_ON 2
562
563 #define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED
564 #define GFS2_DATA_WRITEBACK 1
565 #define GFS2_DATA_ORDERED 2
566
567 #define GFS2_ERRORS_DEFAULT GFS2_ERRORS_WITHDRAW
568 #define GFS2_ERRORS_WITHDRAW 0
569 #define GFS2_ERRORS_CONTINUE 1 /* place holder for future feature */
570 #define GFS2_ERRORS_RO 2 /* place holder for future feature */
571 #define GFS2_ERRORS_PANIC 3
572
573 struct gfs2_args {
574 char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
575 char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
576 char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
577 unsigned int ar_spectator:1; /* Don't get a journal */
578 unsigned int ar_localflocks:1; /* Let the VFS do flock|fcntl */
579 unsigned int ar_debug:1; /* Oops on errors */
580 unsigned int ar_posix_acl:1; /* Enable posix acls */
581 unsigned int ar_quota:2; /* off/account/on */
582 unsigned int ar_suiddir:1; /* suiddir support */
583 unsigned int ar_data:2; /* ordered/writeback */
584 unsigned int ar_meta:1; /* mount metafs */
585 unsigned int ar_discard:1; /* discard requests */
586 unsigned int ar_errors:2; /* errors=withdraw | panic */
587 unsigned int ar_nobarrier:1; /* do not send barriers */
588 unsigned int ar_rgrplvb:1; /* use lvbs for rgrp info */
589 unsigned int ar_loccookie:1; /* use location based readdir
590 cookies */
591 s32 ar_commit; /* Commit interval */
592 s32 ar_statfs_quantum; /* The fast statfs interval */
593 s32 ar_quota_quantum; /* The quota interval */
594 s32 ar_statfs_percent; /* The % change to force sync */
595 };
596
597 struct gfs2_tune {
598 spinlock_t gt_spin;
599
600 unsigned int gt_logd_secs;
601
602 unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
603 unsigned int gt_quota_scale_num; /* Numerator */
604 unsigned int gt_quota_scale_den; /* Denominator */
605 unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
606 unsigned int gt_new_files_jdata;
607 unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
608 unsigned int gt_complain_secs;
609 unsigned int gt_statfs_quantum;
610 unsigned int gt_statfs_slow;
611 };
612
613 enum {
614 SDF_JOURNAL_CHECKED = 0,
615 SDF_JOURNAL_LIVE = 1,
616 SDF_WITHDRAWN = 2,
617 SDF_NOBARRIERS = 3,
618 SDF_NORECOVERY = 4,
619 SDF_DEMOTE = 5,
620 SDF_NOJOURNALID = 6,
621 SDF_RORECOVERY = 7, /* read only recovery */
622 SDF_SKIP_DLM_UNLOCK = 8,
623 SDF_FORCE_AIL_FLUSH = 9,
624 SDF_FS_FROZEN = 10,
625 SDF_WITHDRAWING = 11, /* Will withdraw eventually */
626 SDF_WITHDRAW_IN_PROG = 12, /* Withdraw is in progress */
627 SDF_REMOTE_WITHDRAW = 13, /* Performing remote recovery */
628 SDF_WITHDRAW_RECOVERY = 14, /* Wait for journal recovery when we are
629 withdrawing */
630 };
631
632 enum gfs2_freeze_state {
633 SFS_UNFROZEN = 0,
634 SFS_STARTING_FREEZE = 1,
635 SFS_FROZEN = 2,
636 };
637
638 #define GFS2_FSNAME_LEN 256
639
640 struct gfs2_inum_host {
641 u64 no_formal_ino;
642 u64 no_addr;
643 };
644
645 struct gfs2_sb_host {
646 u32 sb_magic;
647 u32 sb_type;
648 u32 sb_format;
649
650 u32 sb_fs_format;
651 u32 sb_multihost_format;
652 u32 sb_bsize;
653 u32 sb_bsize_shift;
654
655 struct gfs2_inum_host sb_master_dir;
656 struct gfs2_inum_host sb_root_dir;
657
658 char sb_lockproto[GFS2_LOCKNAME_LEN];
659 char sb_locktable[GFS2_LOCKNAME_LEN];
660 };
661
662 /*
663 * lm_mount() return values
664 *
665 * ls_jid - the journal ID this node should use
666 * ls_first - this node is the first to mount the file system
667 * ls_lockspace - lock module's context for this file system
668 * ls_ops - lock module's functions
669 */
670
671 struct lm_lockstruct {
672 int ls_jid;
673 unsigned int ls_first;
674 const struct lm_lockops *ls_ops;
675 dlm_lockspace_t *ls_dlm;
676
677 int ls_recover_jid_done; /* These two are deprecated, */
678 int ls_recover_jid_status; /* used previously by gfs_controld */
679
680 struct dlm_lksb ls_mounted_lksb; /* mounted_lock */
681 struct dlm_lksb ls_control_lksb; /* control_lock */
682 char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */
683 struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */
684 char *ls_lvb_bits;
685
686 spinlock_t ls_recover_spin; /* protects following fields */
687 unsigned long ls_recover_flags; /* DFL_ */
688 uint32_t ls_recover_mount; /* gen in first recover_done cb */
689 uint32_t ls_recover_start; /* gen in last recover_done cb */
690 uint32_t ls_recover_block; /* copy recover_start in last recover_prep */
691 uint32_t ls_recover_size; /* size of recover_submit, recover_result */
692 uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */
693 uint32_t *ls_recover_result; /* result of last jid recovery */
694 };
695
696 struct gfs2_pcpu_lkstats {
697 /* One struct for each glock type */
698 struct gfs2_lkstats lkstats[10];
699 };
700
701 /* List of local (per node) statfs inodes */
702 struct local_statfs_inode {
703 struct list_head si_list;
704 struct inode *si_sc_inode;
705 unsigned int si_jid; /* journal id this statfs inode corresponds to */
706 };
707
708 struct gfs2_sbd {
709 struct super_block *sd_vfs;
710 struct gfs2_pcpu_lkstats __percpu *sd_lkstats;
711 struct kobject sd_kobj;
712 struct completion sd_kobj_unregister;
713 unsigned long sd_flags; /* SDF_... */
714 struct gfs2_sb_host sd_sb;
715
716 /* Constants computed on mount */
717
718 u32 sd_fsb2bb;
719 u32 sd_fsb2bb_shift;
720 u32 sd_diptrs; /* Number of pointers in a dinode */
721 u32 sd_inptrs; /* Number of pointers in a indirect block */
722 u32 sd_ldptrs; /* Number of pointers in a log descriptor block */
723 u32 sd_jbsize; /* Size of a journaled data block */
724 u32 sd_hash_bsize; /* sizeof(exhash block) */
725 u32 sd_hash_bsize_shift;
726 u32 sd_hash_ptrs; /* Number of pointers in a hash block */
727 u32 sd_qc_per_block;
728 u32 sd_blocks_per_bitmap;
729 u32 sd_max_dirres; /* Max blocks needed to add a directory entry */
730 u32 sd_max_height; /* Max height of a file's metadata tree */
731 u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
732 u32 sd_max_dents_per_leaf; /* Max number of dirents in a leaf block */
733
734 struct gfs2_args sd_args; /* Mount arguments */
735 struct gfs2_tune sd_tune; /* Filesystem tuning structure */
736
737 /* Lock Stuff */
738
739 struct lm_lockstruct sd_lockstruct;
740 struct gfs2_holder sd_live_gh;
741 struct gfs2_glock *sd_rename_gl;
742 struct gfs2_glock *sd_freeze_gl;
743 struct work_struct sd_freeze_work;
744 wait_queue_head_t sd_glock_wait;
745 wait_queue_head_t sd_async_glock_wait;
746 atomic_t sd_glock_disposal;
747 struct completion sd_locking_init;
748 struct completion sd_wdack;
749 struct delayed_work sd_control_work;
750
751 /* Inode Stuff */
752
753 struct dentry *sd_master_dir;
754 struct dentry *sd_root_dir;
755
756 struct inode *sd_jindex;
757 struct inode *sd_statfs_inode;
758 struct inode *sd_sc_inode;
759 struct list_head sd_sc_inodes_list;
760 struct inode *sd_qc_inode;
761 struct inode *sd_rindex;
762 struct inode *sd_quota_inode;
763
764 /* StatFS stuff */
765
766 spinlock_t sd_statfs_spin;
767 struct gfs2_statfs_change_host sd_statfs_master;
768 struct gfs2_statfs_change_host sd_statfs_local;
769 int sd_statfs_force_sync;
770
771 /* Resource group stuff */
772
773 int sd_rindex_uptodate;
774 spinlock_t sd_rindex_spin;
775 struct rb_root sd_rindex_tree;
776 unsigned int sd_rgrps;
777 unsigned int sd_max_rg_data;
778
779 /* Journal index stuff */
780
781 struct list_head sd_jindex_list;
782 spinlock_t sd_jindex_spin;
783 struct mutex sd_jindex_mutex;
784 unsigned int sd_journals;
785
786 struct gfs2_jdesc *sd_jdesc;
787 struct gfs2_holder sd_journal_gh;
788 struct gfs2_holder sd_jinode_gh;
789 struct gfs2_glock *sd_jinode_gl;
790
791 struct gfs2_holder sd_sc_gh;
792 struct gfs2_holder sd_qc_gh;
793
794 struct completion sd_journal_ready;
795
796 /* Daemon stuff */
797
798 struct task_struct *sd_logd_process;
799 struct task_struct *sd_quotad_process;
800
801 /* Quota stuff */
802
803 struct list_head sd_quota_list;
804 atomic_t sd_quota_count;
805 struct mutex sd_quota_mutex;
806 struct mutex sd_quota_sync_mutex;
807 wait_queue_head_t sd_quota_wait;
808 struct list_head sd_trunc_list;
809 spinlock_t sd_trunc_lock;
810
811 unsigned int sd_quota_slots;
812 unsigned long *sd_quota_bitmap;
813 spinlock_t sd_bitmap_lock;
814
815 u64 sd_quota_sync_gen;
816
817 /* Log stuff */
818
819 struct address_space sd_aspace;
820
821 spinlock_t sd_log_lock;
822
823 struct gfs2_trans *sd_log_tr;
824 unsigned int sd_log_blks_reserved;
825 int sd_log_committed_revoke;
826
827 atomic_t sd_log_pinned;
828 unsigned int sd_log_num_revoke;
829
830 struct list_head sd_log_revokes;
831 struct list_head sd_log_ordered;
832 spinlock_t sd_ordered_lock;
833
834 atomic_t sd_log_thresh1;
835 atomic_t sd_log_thresh2;
836 atomic_t sd_log_blks_free;
837 atomic_t sd_log_blks_needed;
838 wait_queue_head_t sd_log_waitq;
839 wait_queue_head_t sd_logd_waitq;
840
841 u64 sd_log_sequence;
842 unsigned int sd_log_head;
843 unsigned int sd_log_tail;
844 int sd_log_idle;
845
846 struct rw_semaphore sd_log_flush_lock;
847 atomic_t sd_log_in_flight;
848 struct bio *sd_log_bio;
849 wait_queue_head_t sd_log_flush_wait;
850 int sd_log_error; /* First log error */
851 wait_queue_head_t sd_withdraw_wait;
852
853 atomic_t sd_reserving_log;
854 wait_queue_head_t sd_reserving_log_wait;
855
856 unsigned int sd_log_flush_head;
857
858 spinlock_t sd_ail_lock;
859 struct list_head sd_ail1_list;
860 struct list_head sd_ail2_list;
861
862 /* For quiescing the filesystem */
863 struct gfs2_holder sd_freeze_gh;
864 atomic_t sd_freeze_state;
865 struct mutex sd_freeze_mutex;
866
867 char sd_fsname[GFS2_FSNAME_LEN + 3 * sizeof(int) + 2];
868 char sd_table_name[GFS2_FSNAME_LEN];
869 char sd_proto_name[GFS2_FSNAME_LEN];
870
871 /* Debugging crud */
872
873 unsigned long sd_last_warning;
874 struct dentry *debugfs_dir; /* debugfs directory */
875 unsigned long sd_glock_dqs_held;
876 };
877
gfs2_glstats_inc(struct gfs2_glock * gl,int which)878 static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which)
879 {
880 gl->gl_stats.stats[which]++;
881 }
882
gfs2_sbstats_inc(const struct gfs2_glock * gl,int which)883 static inline void gfs2_sbstats_inc(const struct gfs2_glock *gl, int which)
884 {
885 const struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
886 preempt_disable();
887 this_cpu_ptr(sdp->sd_lkstats)->lkstats[gl->gl_name.ln_type].stats[which]++;
888 preempt_enable();
889 }
890
891 extern struct gfs2_rgrpd *gfs2_glock2rgrp(struct gfs2_glock *gl);
892
gfs2_max_stuffed_size(const struct gfs2_inode * ip)893 static inline unsigned gfs2_max_stuffed_size(const struct gfs2_inode *ip)
894 {
895 return GFS2_SB(&ip->i_inode)->sd_sb.sb_bsize - sizeof(struct gfs2_dinode);
896 }
897
898 #endif /* __INCORE_DOT_H__ */
899
900
