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 #include <linux/mutex.h>
24
25 #define DIO_WAIT 0x00000010
26 #define DIO_METADATA 0x00000020
27
28 struct gfs2_log_operations;
29 struct gfs2_bufdata;
30 struct gfs2_holder;
31 struct gfs2_glock;
32 struct gfs2_quota_data;
33 struct gfs2_trans;
34 struct gfs2_jdesc;
35 struct gfs2_sbd;
36 struct lm_lockops;
37
38 typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
39
40 struct gfs2_log_header_host {
41 u64 lh_sequence; /* Sequence number of this transaction */
42 u32 lh_flags; /* GFS2_LOG_HEAD_... */
43 u32 lh_tail; /* Block number of log tail */
44 u32 lh_blkno;
45
46 s64 lh_local_total;
47 s64 lh_local_free;
48 s64 lh_local_dinodes;
49 };
50
51 /*
52 * Structure of operations that are associated with each
53 * type of element in the log.
54 */
55
56 struct gfs2_log_operations {
57 void (*lo_before_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr);
58 void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr);
59 void (*lo_before_scan) (struct gfs2_jdesc *jd,
60 struct gfs2_log_header_host *head, int pass);
61 int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start,
62 struct gfs2_log_descriptor *ld, __be64 *ptr,
63 int pass);
64 void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass);
65 const char *lo_name;
66 };
67
68 #define GBF_FULL 1
69
70 /**
71 * Clone bitmaps (bi_clone):
72 *
73 * - When a block is freed, we remember the previous state of the block in the
74 * clone bitmap, and only mark the block as free in the real bitmap.
75 *
76 * - When looking for a block to allocate, we check for a free block in the
77 * clone bitmap, and if no clone bitmap exists, in the real bitmap.
78 *
79 * - For allocating a block, we mark it as allocated in the real bitmap, and if
80 * a clone bitmap exists, also in the clone bitmap.
81 *
82 * - At the end of a log_flush, we copy the real bitmap into the clone bitmap
83 * to make the clone bitmap reflect the current allocation state.
84 * (Alternatively, we could remove the clone bitmap.)
85 *
86 * The clone bitmaps are in-core only, and is never written to disk.
87 *
88 * These steps ensure that blocks which have been freed in a transaction cannot
89 * be reallocated in that same transaction.
90 */
91 struct gfs2_bitmap {
92 struct buffer_head *bi_bh;
93 char *bi_clone;
94 unsigned long bi_flags;
95 u32 bi_offset;
96 u32 bi_start;
97 u32 bi_bytes;
98 u32 bi_blocks;
99 };
100
101 struct gfs2_rgrpd {
102 struct rb_node rd_node; /* Link with superblock */
103 struct gfs2_glock *rd_gl; /* Glock for this rgrp */
104 u64 rd_addr; /* grp block disk address */
105 u64 rd_data0; /* first data location */
106 u32 rd_length; /* length of rgrp header in fs blocks */
107 u32 rd_data; /* num of data blocks in rgrp */
108 u32 rd_bitbytes; /* number of bytes in data bitmaps */
109 u32 rd_free;
110 u32 rd_requested; /* number of blocks in rd_rstree */
111 u32 rd_reserved; /* number of reserved blocks */
112 u32 rd_free_clone;
113 u32 rd_dinodes;
114 u64 rd_igeneration;
115 struct gfs2_bitmap *rd_bits;
116 struct gfs2_sbd *rd_sbd;
117 struct gfs2_rgrp_lvb *rd_rgl;
118 u32 rd_last_alloc;
119 u32 rd_flags;
120 u32 rd_extfail_pt; /* extent failure point */
121 #define GFS2_RDF_CHECK 0x10000000 /* check for unlinked inodes */
122 #define GFS2_RDF_ERROR 0x40000000 /* error in rg */
123 #define GFS2_RDF_PREFERRED 0x80000000 /* This rgrp is preferred */
124 #define GFS2_RDF_MASK 0xf0000000 /* mask for internal flags */
125 spinlock_t rd_rsspin; /* protects reservation related vars */
126 struct mutex rd_mutex;
127 struct rb_root rd_rstree; /* multi-block reservation tree */
128 };
129
130 enum gfs2_state_bits {
131 BH_Pinned = BH_PrivateStart,
132 BH_Escaped = BH_PrivateStart + 1,
133 };
134
135 BUFFER_FNS(Pinned, pinned)
136 TAS_BUFFER_FNS(Pinned, pinned)
137 BUFFER_FNS(Escaped, escaped)
138 TAS_BUFFER_FNS(Escaped, escaped)
139
140 struct gfs2_bufdata {
141 struct buffer_head *bd_bh;
142 struct gfs2_glock *bd_gl;
143 u64 bd_blkno;
144
145 struct list_head bd_list;
146
147 struct gfs2_trans *bd_tr;
148 struct list_head bd_ail_st_list;
149 struct list_head bd_ail_gl_list;
150 };
151
152 /*
153 * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
154 * prefix of lock_dlm_ gets awkward.
155 */
156
157 #define GDLM_STRNAME_BYTES 25
158 #define GDLM_LVB_SIZE 32
159
160 /*
161 * ls_recover_flags:
162 *
163 * DFL_BLOCK_LOCKS: dlm is in recovery and will grant locks that had been
164 * held by failed nodes whose journals need recovery. Those locks should
165 * only be used for journal recovery until the journal recovery is done.
166 * This is set by the dlm recover_prep callback and cleared by the
167 * gfs2_control thread when journal recovery is complete. To avoid
168 * races between recover_prep setting and gfs2_control clearing, recover_spin
169 * is held while changing this bit and reading/writing recover_block
170 * and recover_start.
171 *
172 * DFL_NO_DLM_OPS: dlm lockspace ops/callbacks are not being used.
173 *
174 * DFL_FIRST_MOUNT: this node is the first to mount this fs and is doing
175 * recovery of all journals before allowing other nodes to mount the fs.
176 * This is cleared when FIRST_MOUNT_DONE is set.
177 *
178 * DFL_FIRST_MOUNT_DONE: this node was the first mounter, and has finished
179 * recovery of all journals, and now allows other nodes to mount the fs.
180 *
181 * DFL_MOUNT_DONE: gdlm_mount has completed successfully and cleared
182 * BLOCK_LOCKS for the first time. The gfs2_control thread should now
183 * control clearing BLOCK_LOCKS for further recoveries.
184 *
185 * DFL_UNMOUNT: gdlm_unmount sets to keep sdp off gfs2_control_wq.
186 *
187 * DFL_DLM_RECOVERY: set while dlm is in recovery, between recover_prep()
188 * and recover_done(), i.e. set while recover_block == recover_start.
189 */
190
191 enum {
192 DFL_BLOCK_LOCKS = 0,
193 DFL_NO_DLM_OPS = 1,
194 DFL_FIRST_MOUNT = 2,
195 DFL_FIRST_MOUNT_DONE = 3,
196 DFL_MOUNT_DONE = 4,
197 DFL_UNMOUNT = 5,
198 DFL_DLM_RECOVERY = 6,
199 };
200
201 /*
202 * We are using struct lm_lockname as an rhashtable key. Avoid holes within
203 * the struct; padding at the end is fine.
204 */
205 struct lm_lockname {
206 u64 ln_number;
207 struct gfs2_sbd *ln_sbd;
208 unsigned int ln_type;
209 };
210
211 #define lm_name_equal(name1, name2) \
212 (((name1)->ln_number == (name2)->ln_number) && \
213 ((name1)->ln_type == (name2)->ln_type) && \
214 ((name1)->ln_sbd == (name2)->ln_sbd))
215
216
217 struct gfs2_glock_operations {
218 int (*go_sync) (struct gfs2_glock *gl);
219 int (*go_xmote_bh)(struct gfs2_glock *gl);
220 void (*go_inval) (struct gfs2_glock *gl, int flags);
221 int (*go_instantiate) (struct gfs2_glock *gl);
222 int (*go_held)(struct gfs2_holder *gh);
223 void (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl,
224 const char *fs_id_buf);
225 void (*go_callback)(struct gfs2_glock *gl, bool remote);
226 void (*go_unlocked)(struct gfs2_glock *gl);
227 const int go_subclass;
228 const int go_type;
229 const unsigned long go_flags;
230 #define GLOF_ASPACE 1 /* address space attached */
231 #define GLOF_LVB 2 /* Lock Value Block attached */
232 #define GLOF_NONDISK 8 /* not I/O related */
233 };
234
235 enum {
236 GFS2_LKS_SRTT = 0, /* Non blocking smoothed round trip time */
237 GFS2_LKS_SRTTVAR = 1, /* Non blocking smoothed variance */
238 GFS2_LKS_SRTTB = 2, /* Blocking smoothed round trip time */
239 GFS2_LKS_SRTTVARB = 3, /* Blocking smoothed variance */
240 GFS2_LKS_SIRT = 4, /* Smoothed Inter-request time */
241 GFS2_LKS_SIRTVAR = 5, /* Smoothed Inter-request variance */
242 GFS2_LKS_DCOUNT = 6, /* Count of dlm requests */
243 GFS2_LKS_QCOUNT = 7, /* Count of gfs2_holder queues */
244 GFS2_NR_LKSTATS
245 };
246
247 struct gfs2_lkstats {
248 u64 stats[GFS2_NR_LKSTATS];
249 };
250
251 enum {
252 /* States */
253 HIF_HOLDER = 6, /* Set for gh that "holds" the glock */
254 HIF_WAIT = 10,
255 };
256
257 struct gfs2_holder {
258 struct list_head gh_list;
259
260 struct gfs2_glock *gh_gl;
261 struct pid *gh_owner_pid;
262 u16 gh_flags;
263 u16 gh_state;
264
265 int gh_error;
266 unsigned long gh_iflags; /* HIF_... */
267 unsigned long gh_ip;
268 };
269
270 /* Number of quota types we support */
271 #define GFS2_MAXQUOTAS 2
272
273 struct gfs2_qadata { /* quota allocation data */
274 /* Quota stuff */
275 struct gfs2_quota_data *qa_qd[2 * GFS2_MAXQUOTAS];
276 struct gfs2_holder qa_qd_ghs[2 * GFS2_MAXQUOTAS];
277 unsigned int qa_qd_num;
278 int qa_ref;
279 };
280
281 /* Resource group multi-block reservation, in order of appearance:
282
283 Step 1. Function prepares to write, allocates a mb, sets the size hint.
284 Step 2. User calls inplace_reserve to target an rgrp, sets the rgrp info
285 Step 3. Function get_local_rgrp locks the rgrp, determines which bits to use
286 Step 4. Bits are assigned from the rgrp based on either the reservation
287 or wherever it can.
288 */
289
290 struct gfs2_blkreserv {
291 struct rb_node rs_node; /* node within rd_rstree */
292 struct gfs2_rgrpd *rs_rgd;
293 u64 rs_start;
294 u32 rs_requested;
295 u32 rs_reserved; /* number of reserved blocks */
296 };
297
298 /*
299 * Allocation parameters
300 * @target: The number of blocks we'd ideally like to allocate
301 * @aflags: The flags (e.g. Orlov flag)
302 *
303 * The intent is to gradually expand this structure over time in
304 * order to give more information, e.g. alignment, min extent size
305 * to the allocation code.
306 */
307 struct gfs2_alloc_parms {
308 u64 target;
309 u32 min_target;
310 u32 aflags;
311 u64 allowed;
312 };
313
314 enum {
315 GLF_LOCK = 1,
316 GLF_INSTANTIATE_NEEDED = 2, /* needs instantiate */
317 GLF_DEMOTE = 3,
318 GLF_PENDING_DEMOTE = 4,
319 GLF_DEMOTE_IN_PROGRESS = 5,
320 GLF_DIRTY = 6,
321 GLF_LFLUSH = 7,
322 GLF_INVALIDATE_IN_PROGRESS = 8,
323 GLF_HAVE_REPLY = 9,
324 GLF_INITIAL = 10,
325 GLF_HAVE_FROZEN_REPLY = 11,
326 GLF_INSTANTIATE_IN_PROG = 12, /* instantiate happening now */
327 GLF_LRU = 13,
328 GLF_OBJECT = 14, /* Used only for tracing */
329 GLF_BLOCKING = 15,
330 GLF_UNLOCKED = 16, /* Wait for glock to be unlocked */
331 GLF_TRY_TO_EVICT = 17, /* iopen glocks only */
332 GLF_VERIFY_EVICT = 18, /* iopen glocks only */
333 };
334
335 struct gfs2_glock {
336 unsigned long gl_flags; /* GLF_... */
337 struct lm_lockname gl_name;
338
339 struct lockref gl_lockref;
340
341 /* State fields protected by gl_lockref.lock */
342 unsigned int gl_state:2, /* Current state */
343 gl_target:2, /* Target state */
344 gl_demote_state:2, /* State requested by remote node */
345 gl_req:2, /* State in last dlm request */
346 gl_reply:8; /* Last reply from the dlm */
347
348 unsigned long gl_demote_time; /* time of first demote request */
349 long gl_hold_time;
350 struct list_head gl_holders;
351
352 const struct gfs2_glock_operations *gl_ops;
353 ktime_t gl_dstamp;
354 struct gfs2_lkstats gl_stats;
355 struct dlm_lksb gl_lksb;
356 unsigned long gl_tchange;
357 void *gl_object;
358
359 struct list_head gl_lru;
360 struct list_head gl_ail_list;
361 atomic_t gl_ail_count;
362 atomic_t gl_revokes;
363 struct delayed_work gl_work;
364 /* For iopen glocks only */
365 struct {
366 struct delayed_work gl_delete;
367 u64 gl_no_formal_ino;
368 };
369 struct rcu_head gl_rcu;
370 struct rhash_head gl_node;
371 };
372
373 enum {
374 GIF_QD_LOCKED = 1,
375 GIF_ALLOC_FAILED = 2,
376 GIF_SW_PAGED = 3,
377 GIF_FREE_VFS_INODE = 5,
378 GIF_GLOP_PENDING = 6,
379 GIF_DEFERRED_DELETE = 7,
380 };
381
382 struct gfs2_inode {
383 struct inode i_inode;
384 u64 i_no_addr;
385 u64 i_no_formal_ino;
386 u64 i_generation;
387 u64 i_eattr;
388 unsigned long i_flags; /* GIF_... */
389 struct gfs2_glock *i_gl;
390 struct gfs2_holder i_iopen_gh;
391 struct gfs2_qadata *i_qadata; /* quota allocation data */
392 struct gfs2_holder i_rgd_gh;
393 struct gfs2_blkreserv i_res; /* rgrp multi-block reservation */
394 u64 i_goal; /* goal block for allocations */
395 atomic_t i_sizehint; /* hint of the write size */
396 struct rw_semaphore i_rw_mutex;
397 struct list_head i_ordered;
398 __be64 *i_hash_cache;
399 u32 i_entries;
400 u32 i_diskflags;
401 u8 i_height;
402 u8 i_depth;
403 u16 i_rahead;
404 };
405
406 /*
407 * Since i_inode is the first element of struct gfs2_inode,
408 * this is effectively a cast.
409 */
410 static inline struct gfs2_inode *GFS2_I(struct inode *inode)
411 {
412 return container_of(inode, struct gfs2_inode, i_inode);
413 }
414
415 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
416 {
417 return inode->i_sb->s_fs_info;
418 }
419
420 struct gfs2_file {
421 struct mutex f_fl_mutex;
422 struct gfs2_holder f_fl_gh;
423 };
424
425 struct gfs2_revoke_replay {
426 struct list_head rr_list;
427 u64 rr_blkno;
428 unsigned int rr_where;
429 };
430
431 enum {
432 QDF_CHANGE = 1,
433 QDF_LOCKED = 2,
434 QDF_REFRESH = 3,
435 QDF_QMSG_QUIET = 4,
436 };
437
438 struct gfs2_quota_data {
439 struct hlist_bl_node qd_hlist;
440 struct list_head qd_list;
441 struct kqid qd_id;
442 struct gfs2_sbd *qd_sbd;
443 struct lockref qd_lockref;
444 struct list_head qd_lru;
445 unsigned qd_hash;
446
447 unsigned long qd_flags; /* QDF_... */
448
449 s64 qd_change;
450 s64 qd_change_sync;
451
452 unsigned int qd_slot;
453 unsigned int qd_slot_ref;
454
455 struct buffer_head *qd_bh;
456 struct gfs2_quota_change *qd_bh_qc;
457 unsigned int qd_bh_count;
458
459 struct gfs2_glock *qd_gl;
460 struct gfs2_quota_lvb qd_qb;
461
462 u64 qd_sync_gen;
463 unsigned long qd_last_warn;
464 struct rcu_head qd_rcu;
465 };
466
467 enum {
468 TR_TOUCHED = 1,
469 TR_ATTACHED = 2,
470 TR_ONSTACK = 3,
471 };
472
473 struct gfs2_trans {
474 unsigned long tr_ip;
475
476 unsigned int tr_blocks;
477 unsigned int tr_revokes;
478 unsigned int tr_reserved;
479 unsigned long tr_flags;
480
481 unsigned int tr_num_buf_new;
482 unsigned int tr_num_databuf_new;
483 unsigned int tr_num_buf_rm;
484 unsigned int tr_num_databuf_rm;
485 unsigned int tr_num_revoke;
486
487 struct list_head tr_list;
488 struct list_head tr_databuf;
489 struct list_head tr_buf;
490
491 unsigned int tr_first;
492 struct list_head tr_ail1_list;
493 struct list_head tr_ail2_list;
494 };
495
496 struct gfs2_journal_extent {
497 struct list_head list;
498
499 unsigned int lblock; /* First logical block */
500 u64 dblock; /* First disk block */
501 u64 blocks;
502 };
503
504 struct gfs2_jdesc {
505 struct list_head jd_list;
506 struct list_head extent_list;
507 unsigned int nr_extents;
508 struct work_struct jd_work;
509 struct inode *jd_inode;
510 struct bio *jd_log_bio;
511 unsigned long jd_flags;
512 #define JDF_RECOVERY 1
513 unsigned int jd_jid;
514 u32 jd_blocks;
515 int jd_recover_error;
516 /* Replay stuff */
517
518 unsigned int jd_found_blocks;
519 unsigned int jd_found_revokes;
520 unsigned int jd_replayed_blocks;
521
522 struct list_head jd_revoke_list;
523 unsigned int jd_replay_tail;
524
525 u64 jd_no_addr;
526 };
527
528 struct gfs2_statfs_change_host {
529 s64 sc_total;
530 s64 sc_free;
531 s64 sc_dinodes;
532 };
533
534 #define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF
535 #define GFS2_QUOTA_OFF 0
536 #define GFS2_QUOTA_ACCOUNT 1
537 #define GFS2_QUOTA_ON 2
538 #define GFS2_QUOTA_QUIET 3 /* on but not complaining */
539
540 #define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED
541 #define GFS2_DATA_WRITEBACK 1
542 #define GFS2_DATA_ORDERED 2
543
544 #define GFS2_ERRORS_DEFAULT GFS2_ERRORS_WITHDRAW
545 #define GFS2_ERRORS_WITHDRAW 0
546 #define GFS2_ERRORS_CONTINUE 1 /* place holder for future feature */
547 #define GFS2_ERRORS_RO 2 /* place holder for future feature */
548 #define GFS2_ERRORS_PANIC 3
549
550 struct gfs2_args {
551 char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
552 char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
553 char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
554 unsigned int ar_spectator:1; /* Don't get a journal */
555 unsigned int ar_localflocks:1; /* Let the VFS do flock|fcntl */
556 unsigned int ar_debug:1; /* Oops on errors */
557 unsigned int ar_posix_acl:1; /* Enable posix acls */
558 unsigned int ar_quota:2; /* off/account/on */
559 unsigned int ar_suiddir:1; /* suiddir support */
560 unsigned int ar_data:2; /* ordered/writeback */
561 unsigned int ar_meta:1; /* mount metafs */
562 unsigned int ar_discard:1; /* discard requests */
563 unsigned int ar_errors:2; /* errors=withdraw | panic */
564 unsigned int ar_nobarrier:1; /* do not send barriers */
565 unsigned int ar_rgrplvb:1; /* use lvbs for rgrp info */
566 unsigned int ar_got_rgrplvb:1; /* Was the rgrplvb opt given? */
567 unsigned int ar_loccookie:1; /* use location based readdir
568 cookies */
569 s32 ar_commit; /* Commit interval */
570 s32 ar_statfs_quantum; /* The fast statfs interval */
571 s32 ar_quota_quantum; /* The quota interval */
572 s32 ar_statfs_percent; /* The % change to force sync */
573 };
574
575 struct gfs2_tune {
576 spinlock_t gt_spin;
577
578 unsigned int gt_logd_secs;
579
580 unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
581 unsigned int gt_quota_scale_num; /* Numerator */
582 unsigned int gt_quota_scale_den; /* Denominator */
583 unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
584 unsigned int gt_new_files_jdata;
585 unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
586 unsigned int gt_complain_secs;
587 unsigned int gt_statfs_quantum;
588 unsigned int gt_statfs_slow;
589 };
590
591 enum {
592 SDF_JOURNAL_CHECKED = 0,
593 SDF_JOURNAL_LIVE = 1,
594 SDF_WITHDRAWN = 2,
595 SDF_NOBARRIERS = 3,
596 SDF_NORECOVERY = 4,
597 SDF_DEMOTE = 5,
598 SDF_NOJOURNALID = 6,
599 SDF_RORECOVERY = 7, /* read only recovery */
600 SDF_SKIP_DLM_UNLOCK = 8,
601 SDF_FORCE_AIL_FLUSH = 9,
602 SDF_FREEZE_INITIATOR = 10,
603 SDF_WITHDRAWING = 11, /* Will withdraw eventually */
604 SDF_WITHDRAW_IN_PROG = 12, /* Withdraw is in progress */
605 SDF_REMOTE_WITHDRAW = 13, /* Performing remote recovery */
606 SDF_WITHDRAW_RECOVERY = 14, /* Wait for journal recovery when we are
607 withdrawing */
608 SDF_KILL = 15,
609 SDF_EVICTING = 16,
610 SDF_FROZEN = 17,
611 };
612
613 #define GFS2_FSNAME_LEN 256
614
615 struct gfs2_inum_host {
616 u64 no_formal_ino;
617 u64 no_addr;
618 };
619
620 struct gfs2_sb_host {
621 u32 sb_magic;
622 u32 sb_type;
623
624 u32 sb_fs_format;
625 u32 sb_multihost_format;
626 u32 sb_bsize;
627 u32 sb_bsize_shift;
628
629 struct gfs2_inum_host sb_master_dir;
630 struct gfs2_inum_host sb_root_dir;
631
632 char sb_lockproto[GFS2_LOCKNAME_LEN];
633 char sb_locktable[GFS2_LOCKNAME_LEN];
634 };
635
636 /*
637 * lm_mount() return values
638 *
639 * ls_jid - the journal ID this node should use
640 * ls_first - this node is the first to mount the file system
641 * ls_lockspace - lock module's context for this file system
642 * ls_ops - lock module's functions
643 */
644
645 struct lm_lockstruct {
646 int ls_jid;
647 unsigned int ls_first;
648 const struct lm_lockops *ls_ops;
649 dlm_lockspace_t *ls_dlm;
650
651 int ls_recover_jid_done; /* These two are deprecated, */
652 int ls_recover_jid_status; /* used previously by gfs_controld */
653
654 struct dlm_lksb ls_mounted_lksb; /* mounted_lock */
655 struct dlm_lksb ls_control_lksb; /* control_lock */
656 char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */
657 struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */
658 char *ls_lvb_bits;
659
660 spinlock_t ls_recover_spin; /* protects following fields */
661 unsigned long ls_recover_flags; /* DFL_ */
662 uint32_t ls_recover_mount; /* gen in first recover_done cb */
663 uint32_t ls_recover_start; /* gen in last recover_done cb */
664 uint32_t ls_recover_block; /* copy recover_start in last recover_prep */
665 uint32_t ls_recover_size; /* size of recover_submit, recover_result */
666 uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */
667 uint32_t *ls_recover_result; /* result of last jid recovery */
668 };
669
670 struct gfs2_pcpu_lkstats {
671 /* One struct for each glock type */
672 struct gfs2_lkstats lkstats[10];
673 };
674
675 /* List of local (per node) statfs inodes */
676 struct local_statfs_inode {
677 struct list_head si_list;
678 struct inode *si_sc_inode;
679 unsigned int si_jid; /* journal id this statfs inode corresponds to */
680 };
681
682 struct gfs2_sbd {
683 struct super_block *sd_vfs;
684 struct gfs2_pcpu_lkstats __percpu *sd_lkstats;
685 struct kobject sd_kobj;
686 struct completion sd_kobj_unregister;
687 unsigned long sd_flags; /* SDF_... */
688 struct gfs2_sb_host sd_sb;
689
690 /* Constants computed on mount */
691
692 u32 sd_fsb2bb;
693 u32 sd_fsb2bb_shift;
694 u32 sd_diptrs; /* Number of pointers in a dinode */
695 u32 sd_inptrs; /* Number of pointers in a indirect block */
696 u32 sd_ldptrs; /* Number of pointers in a log descriptor block */
697 u32 sd_jbsize; /* Size of a journaled data block */
698 u32 sd_hash_bsize; /* sizeof(exhash block) */
699 u32 sd_hash_bsize_shift;
700 u32 sd_hash_ptrs; /* Number of pointers in a hash block */
701 u32 sd_qc_per_block;
702 u32 sd_blocks_per_bitmap;
703 u32 sd_max_dirres; /* Max blocks needed to add a directory entry */
704 u32 sd_max_height; /* Max height of a file's metadata tree */
705 u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
706 u32 sd_max_dents_per_leaf; /* Max number of dirents in a leaf block */
707
708 struct gfs2_args sd_args; /* Mount arguments */
709 struct gfs2_tune sd_tune; /* Filesystem tuning structure */
710
711 /* Lock Stuff */
712
713 struct lm_lockstruct sd_lockstruct;
714 struct gfs2_holder sd_live_gh;
715 struct gfs2_glock *sd_rename_gl;
716 struct gfs2_glock *sd_freeze_gl;
717 struct work_struct sd_freeze_work;
718 wait_queue_head_t sd_kill_wait;
719 wait_queue_head_t sd_async_glock_wait;
720 atomic_t sd_glock_disposal;
721 struct completion sd_locking_init;
722 struct completion sd_wdack;
723 struct delayed_work sd_control_work;
724
725 /* Inode Stuff */
726
727 struct dentry *sd_master_dir;
728 struct dentry *sd_root_dir;
729
730 struct inode *sd_jindex;
731 struct inode *sd_statfs_inode;
732 struct inode *sd_sc_inode;
733 struct list_head sd_sc_inodes_list;
734 struct inode *sd_qc_inode;
735 struct inode *sd_rindex;
736 struct inode *sd_quota_inode;
737
738 /* StatFS stuff */
739
740 spinlock_t sd_statfs_spin;
741 struct gfs2_statfs_change_host sd_statfs_master;
742 struct gfs2_statfs_change_host sd_statfs_local;
743 int sd_statfs_force_sync;
744
745 /* Resource group stuff */
746
747 int sd_rindex_uptodate;
748 spinlock_t sd_rindex_spin;
749 struct rb_root sd_rindex_tree;
750 unsigned int sd_rgrps;
751 unsigned int sd_max_rg_data;
752
753 /* Journal index stuff */
754
755 struct list_head sd_jindex_list;
756 spinlock_t sd_jindex_spin;
757 struct mutex sd_jindex_mutex;
758 unsigned int sd_journals;
759
760 struct gfs2_jdesc *sd_jdesc;
761 struct gfs2_holder sd_journal_gh;
762 struct gfs2_holder sd_jinode_gh;
763 struct gfs2_glock *sd_jinode_gl;
764
765 struct gfs2_holder sd_sc_gh;
766 struct buffer_head *sd_sc_bh;
767 struct gfs2_holder sd_qc_gh;
768
769 struct completion sd_journal_ready;
770
771 /* Workqueue stuff */
772
773 struct workqueue_struct *sd_glock_wq;
774 struct workqueue_struct *sd_delete_wq;
775
776 /* Daemon stuff */
777
778 struct task_struct *sd_logd_process;
779 struct task_struct *sd_quotad_process;
780
781 /* Quota stuff */
782
783 struct list_head sd_quota_list;
784 atomic_t sd_quota_count;
785 struct mutex sd_quota_sync_mutex;
786 wait_queue_head_t sd_quota_wait;
787
788 unsigned int sd_quota_slots;
789 unsigned long *sd_quota_bitmap;
790 spinlock_t sd_bitmap_lock;
791
792 u64 sd_quota_sync_gen;
793
794 /* Log stuff */
795
796 struct address_space sd_aspace;
797
798 spinlock_t sd_log_lock;
799
800 struct gfs2_trans *sd_log_tr;
801 unsigned int sd_log_blks_reserved;
802
803 atomic_t sd_log_pinned;
804 unsigned int sd_log_num_revoke;
805
806 struct list_head sd_log_revokes;
807 struct list_head sd_log_ordered;
808 spinlock_t sd_ordered_lock;
809
810 atomic_t sd_log_thresh1;
811 atomic_t sd_log_thresh2;
812 atomic_t sd_log_blks_free;
813 atomic_t sd_log_blks_needed;
814 atomic_t sd_log_revokes_available;
815 wait_queue_head_t sd_log_waitq;
816 wait_queue_head_t sd_logd_waitq;
817
818 u64 sd_log_sequence;
819 int sd_log_idle;
820
821 struct rw_semaphore sd_log_flush_lock;
822 atomic_t sd_log_in_flight;
823 wait_queue_head_t sd_log_flush_wait;
824 int sd_log_error; /* First log error */
825 wait_queue_head_t sd_withdraw_wait;
826
827 unsigned int sd_log_tail;
828 unsigned int sd_log_flush_tail;
829 unsigned int sd_log_head;
830 unsigned int sd_log_flush_head;
831
832 spinlock_t sd_ail_lock;
833 struct list_head sd_ail1_list;
834 struct list_head sd_ail2_list;
835
836 /* For quiescing the filesystem */
837 struct gfs2_holder sd_freeze_gh;
838 struct mutex sd_freeze_mutex;
839 struct list_head sd_dead_glocks;
840
841 char sd_fsname[GFS2_FSNAME_LEN + 3 * sizeof(int) + 2];
842 char sd_table_name[GFS2_FSNAME_LEN];
843 char sd_proto_name[GFS2_FSNAME_LEN];
844
845 /* Debugging crud */
846
847 unsigned long sd_last_warning;
848 struct dentry *debugfs_dir; /* debugfs directory */
849 unsigned long sd_glock_dqs_held;
850 };
851
852 static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which)
853 {
854 gl->gl_stats.stats[which]++;
855 }
856
857 static inline void gfs2_sbstats_inc(const struct gfs2_glock *gl, int which)
858 {
859 const struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
860 preempt_disable();
861 this_cpu_ptr(sdp->sd_lkstats)->lkstats[gl->gl_name.ln_type].stats[which]++;
862 preempt_enable();
863 }
864
865 struct gfs2_rgrpd *gfs2_glock2rgrp(struct gfs2_glock *gl);
866
867 static inline unsigned gfs2_max_stuffed_size(const struct gfs2_inode *ip)
868 {
869 return GFS2_SB(&ip->i_inode)->sd_sb.sb_bsize - sizeof(struct gfs2_dinode);
870 }
871
872 #endif /* __INCORE_DOT_H__ */
873
874
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