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_demote_ok) (const struct gfs2_glock *gl);
222 int (*go_instantiate) (struct gfs2_holder *gh);
223 void (*go_dump)(struct seq_file *seq, struct gfs2_glock *gl,
224 const char *fs_id_buf);
225 void (*go_callback)(struct gfs2_glock *gl, bool remote);
226 void (*go_free)(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_LRU 4 /* LRU managed */
233 #define GLOF_NONDISK 8 /* not I/O related */
234 };
235
236 enum {
237 GFS2_LKS_SRTT = 0, /* Non blocking smoothed round trip time */
238 GFS2_LKS_SRTTVAR = 1, /* Non blocking smoothed variance */
239 GFS2_LKS_SRTTB = 2, /* Blocking smoothed round trip time */
240 GFS2_LKS_SRTTVARB = 3, /* Blocking smoothed variance */
241 GFS2_LKS_SIRT = 4, /* Smoothed Inter-request time */
242 GFS2_LKS_SIRTVAR = 5, /* Smoothed Inter-request variance */
243 GFS2_LKS_DCOUNT = 6, /* Count of dlm requests */
244 GFS2_LKS_QCOUNT = 7, /* Count of gfs2_holder queues */
245 GFS2_NR_LKSTATS
246 };
247
248 struct gfs2_lkstats {
249 u64 stats[GFS2_NR_LKSTATS];
250 };
251
252 enum {
253 /* States */
254 HIF_MAY_DEMOTE = 1,
255 HIF_HOLDER = 6, /* Set for gh that "holds" the glock */
256 HIF_WAIT = 10,
257 };
258
259 struct gfs2_holder {
260 struct list_head gh_list;
261
262 struct gfs2_glock *gh_gl;
263 struct pid *gh_owner_pid;
264 u16 gh_flags;
265 u16 gh_state;
266
267 int gh_error;
268 unsigned long gh_iflags; /* HIF_... */
269 unsigned long gh_ip;
270 };
271
272 /* Number of quota types we support */
273 #define GFS2_MAXQUOTAS 2
274
275 struct gfs2_qadata { /* quota allocation data */
276 /* Quota stuff */
277 struct gfs2_quota_data *qa_qd[2 * GFS2_MAXQUOTAS];
278 struct gfs2_holder qa_qd_ghs[2 * GFS2_MAXQUOTAS];
279 unsigned int qa_qd_num;
280 int qa_ref;
281 };
282
283 /* Resource group multi-block reservation, in order of appearance:
284
285 Step 1. Function prepares to write, allocates a mb, sets the size hint.
286 Step 2. User calls inplace_reserve to target an rgrp, sets the rgrp info
287 Step 3. Function get_local_rgrp locks the rgrp, determines which bits to use
288 Step 4. Bits are assigned from the rgrp based on either the reservation
289 or wherever it can.
290 */
291
292 struct gfs2_blkreserv {
293 struct rb_node rs_node; /* node within rd_rstree */
294 struct gfs2_rgrpd *rs_rgd;
295 u64 rs_start;
296 u32 rs_requested;
297 u32 rs_reserved; /* number of reserved blocks */
298 };
299
300 /*
301 * Allocation parameters
302 * @target: The number of blocks we'd ideally like to allocate
303 * @aflags: The flags (e.g. Orlov flag)
304 *
305 * The intent is to gradually expand this structure over time in
306 * order to give more information, e.g. alignment, min extent size
307 * to the allocation code.
308 */
309 struct gfs2_alloc_parms {
310 u64 target;
311 u32 min_target;
312 u32 aflags;
313 u64 allowed;
314 };
315
316 enum {
317 GLF_LOCK = 1,
318 GLF_INSTANTIATE_NEEDED = 2, /* needs instantiate */
319 GLF_DEMOTE = 3,
320 GLF_PENDING_DEMOTE = 4,
321 GLF_DEMOTE_IN_PROGRESS = 5,
322 GLF_DIRTY = 6,
323 GLF_LFLUSH = 7,
324 GLF_INVALIDATE_IN_PROGRESS = 8,
325 GLF_REPLY_PENDING = 9,
326 GLF_INITIAL = 10,
327 GLF_FROZEN = 11,
328 GLF_INSTANTIATE_IN_PROG = 12, /* instantiate happening now */
329 GLF_LRU = 13,
330 GLF_OBJECT = 14, /* Used only for tracing */
331 GLF_BLOCKING = 15,
332 GLF_PENDING_DELETE = 17,
333 GLF_FREEING = 18, /* Wait for glock to be freed */
334 };
335
336 struct gfs2_glock {
337 unsigned long gl_flags; /* GLF_... */
338 struct lm_lockname gl_name;
339
340 struct lockref gl_lockref;
341
342 /* State fields protected by gl_lockref.lock */
343 unsigned int gl_state:2, /* Current state */
344 gl_target:2, /* Target state */
345 gl_demote_state:2, /* State requested by remote node */
346 gl_req:2, /* State in last dlm request */
347 gl_reply:8; /* Last reply from the dlm */
348
349 unsigned long gl_demote_time; /* time of first demote request */
350 long gl_hold_time;
351 struct list_head gl_holders;
352
353 const struct gfs2_glock_operations *gl_ops;
354 ktime_t gl_dstamp;
355 struct gfs2_lkstats gl_stats;
356 struct dlm_lksb gl_lksb;
357 unsigned long gl_tchange;
358 void *gl_object;
359
360 struct list_head gl_lru;
361 struct list_head gl_ail_list;
362 atomic_t gl_ail_count;
363 atomic_t gl_revokes;
364 struct delayed_work gl_work;
365 /* For iopen glocks only */
366 struct {
367 struct delayed_work gl_delete;
368 u64 gl_no_formal_ino;
369 };
370 struct rcu_head gl_rcu;
371 struct rhash_head gl_node;
372 };
373
374 enum {
375 GIF_QD_LOCKED = 1,
376 GIF_ALLOC_FAILED = 2,
377 GIF_SW_PAGED = 3,
378 GIF_FREE_VFS_INODE = 5,
379 GIF_GLOP_PENDING = 6,
380 GIF_DEFERRED_DELETE = 7,
381 };
382
383 struct gfs2_inode {
384 struct inode i_inode;
385 u64 i_no_addr;
386 u64 i_no_formal_ino;
387 u64 i_generation;
388 u64 i_eattr;
389 unsigned long i_flags; /* GIF_... */
390 struct gfs2_glock *i_gl;
391 struct gfs2_holder i_iopen_gh;
392 struct gfs2_qadata *i_qadata; /* quota allocation data */
393 struct gfs2_holder i_rgd_gh;
394 struct gfs2_blkreserv i_res; /* rgrp multi-block reservation */
395 u64 i_goal; /* goal block for allocations */
396 atomic_t i_sizehint; /* hint of the write size */
397 struct rw_semaphore i_rw_mutex;
398 struct list_head i_ordered;
399 struct list_head i_trunc_list;
400 __be64 *i_hash_cache;
401 u32 i_entries;
402 u32 i_diskflags;
403 u8 i_height;
404 u8 i_depth;
405 u16 i_rahead;
406 };
407
408 /*
409 * Since i_inode is the first element of struct gfs2_inode,
410 * this is effectively a cast.
411 */
GFS2_I(struct inode * inode)412 static inline struct gfs2_inode *GFS2_I(struct inode *inode)
413 {
414 return container_of(inode, struct gfs2_inode, i_inode);
415 }
416
GFS2_SB(const struct inode * inode)417 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
418 {
419 return inode->i_sb->s_fs_info;
420 }
421
422 struct gfs2_file {
423 struct mutex f_fl_mutex;
424 struct gfs2_holder f_fl_gh;
425 };
426
427 struct gfs2_revoke_replay {
428 struct list_head rr_list;
429 u64 rr_blkno;
430 unsigned int rr_where;
431 };
432
433 enum {
434 QDF_CHANGE = 1,
435 QDF_LOCKED = 2,
436 QDF_REFRESH = 3,
437 QDF_QMSG_QUIET = 4,
438 };
439
440 struct gfs2_quota_data {
441 struct hlist_bl_node qd_hlist;
442 struct list_head qd_list;
443 struct kqid qd_id;
444 struct gfs2_sbd *qd_sbd;
445 struct lockref qd_lockref;
446 struct list_head qd_lru;
447 unsigned qd_hash;
448
449 unsigned long qd_flags; /* QDF_... */
450
451 s64 qd_change;
452 s64 qd_change_sync;
453
454 unsigned int qd_slot;
455 unsigned int qd_slot_count;
456
457 struct buffer_head *qd_bh;
458 struct gfs2_quota_change *qd_bh_qc;
459 unsigned int qd_bh_count;
460
461 struct gfs2_glock *qd_gl;
462 struct gfs2_quota_lvb qd_qb;
463
464 u64 qd_sync_gen;
465 unsigned long qd_last_warn;
466 struct rcu_head qd_rcu;
467 };
468
469 enum {
470 TR_TOUCHED = 1,
471 TR_ATTACHED = 2,
472 TR_ONSTACK = 3,
473 };
474
475 struct gfs2_trans {
476 unsigned long tr_ip;
477
478 unsigned int tr_blocks;
479 unsigned int tr_revokes;
480 unsigned int tr_reserved;
481 unsigned long tr_flags;
482
483 unsigned int tr_num_buf_new;
484 unsigned int tr_num_databuf_new;
485 unsigned int tr_num_buf_rm;
486 unsigned int tr_num_databuf_rm;
487 unsigned int tr_num_revoke;
488
489 struct list_head tr_list;
490 struct list_head tr_databuf;
491 struct list_head tr_buf;
492
493 unsigned int tr_first;
494 struct list_head tr_ail1_list;
495 struct list_head tr_ail2_list;
496 };
497
498 struct gfs2_journal_extent {
499 struct list_head list;
500
501 unsigned int lblock; /* First logical block */
502 u64 dblock; /* First disk block */
503 u64 blocks;
504 };
505
506 struct gfs2_jdesc {
507 struct list_head jd_list;
508 struct list_head extent_list;
509 unsigned int nr_extents;
510 struct work_struct jd_work;
511 struct inode *jd_inode;
512 struct bio *jd_log_bio;
513 unsigned long jd_flags;
514 #define JDF_RECOVERY 1
515 unsigned int jd_jid;
516 u32 jd_blocks;
517 int jd_recover_error;
518 /* Replay stuff */
519
520 unsigned int jd_found_blocks;
521 unsigned int jd_found_revokes;
522 unsigned int jd_replayed_blocks;
523
524 struct list_head jd_revoke_list;
525 unsigned int jd_replay_tail;
526
527 u64 jd_no_addr;
528 };
529
530 struct gfs2_statfs_change_host {
531 s64 sc_total;
532 s64 sc_free;
533 s64 sc_dinodes;
534 };
535
536 #define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF
537 #define GFS2_QUOTA_OFF 0
538 #define GFS2_QUOTA_ACCOUNT 1
539 #define GFS2_QUOTA_ON 2
540
541 #define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED
542 #define GFS2_DATA_WRITEBACK 1
543 #define GFS2_DATA_ORDERED 2
544
545 #define GFS2_ERRORS_DEFAULT GFS2_ERRORS_WITHDRAW
546 #define GFS2_ERRORS_WITHDRAW 0
547 #define GFS2_ERRORS_CONTINUE 1 /* place holder for future feature */
548 #define GFS2_ERRORS_RO 2 /* place holder for future feature */
549 #define GFS2_ERRORS_PANIC 3
550
551 struct gfs2_args {
552 char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
553 char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
554 char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
555 unsigned int ar_spectator:1; /* Don't get a journal */
556 unsigned int ar_localflocks:1; /* Let the VFS do flock|fcntl */
557 unsigned int ar_debug:1; /* Oops on errors */
558 unsigned int ar_posix_acl:1; /* Enable posix acls */
559 unsigned int ar_quota:2; /* off/account/on */
560 unsigned int ar_suiddir:1; /* suiddir support */
561 unsigned int ar_data:2; /* ordered/writeback */
562 unsigned int ar_meta:1; /* mount metafs */
563 unsigned int ar_discard:1; /* discard requests */
564 unsigned int ar_errors:2; /* errors=withdraw | panic */
565 unsigned int ar_nobarrier:1; /* do not send barriers */
566 unsigned int ar_rgrplvb:1; /* use lvbs for rgrp info */
567 unsigned int ar_got_rgrplvb:1; /* Was the rgrplvb opt given? */
568 unsigned int ar_loccookie:1; /* use location based readdir
569 cookies */
570 s32 ar_commit; /* Commit interval */
571 s32 ar_statfs_quantum; /* The fast statfs interval */
572 s32 ar_quota_quantum; /* The quota interval */
573 s32 ar_statfs_percent; /* The % change to force sync */
574 };
575
576 struct gfs2_tune {
577 spinlock_t gt_spin;
578
579 unsigned int gt_logd_secs;
580
581 unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
582 unsigned int gt_quota_scale_num; /* Numerator */
583 unsigned int gt_quota_scale_den; /* Denominator */
584 unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
585 unsigned int gt_new_files_jdata;
586 unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
587 unsigned int gt_complain_secs;
588 unsigned int gt_statfs_quantum;
589 unsigned int gt_statfs_slow;
590 };
591
592 enum {
593 SDF_JOURNAL_CHECKED = 0,
594 SDF_JOURNAL_LIVE = 1,
595 SDF_WITHDRAWN = 2,
596 SDF_NOBARRIERS = 3,
597 SDF_NORECOVERY = 4,
598 SDF_DEMOTE = 5,
599 SDF_NOJOURNALID = 6,
600 SDF_RORECOVERY = 7, /* read only recovery */
601 SDF_SKIP_DLM_UNLOCK = 8,
602 SDF_FORCE_AIL_FLUSH = 9,
603 SDF_FS_FROZEN = 10,
604 SDF_WITHDRAWING = 11, /* Will withdraw eventually */
605 SDF_WITHDRAW_IN_PROG = 12, /* Withdraw is in progress */
606 SDF_REMOTE_WITHDRAW = 13, /* Performing remote recovery */
607 SDF_WITHDRAW_RECOVERY = 14, /* Wait for journal recovery when we are
608 withdrawing */
609 };
610
611 enum gfs2_freeze_state {
612 SFS_UNFROZEN = 0,
613 SFS_STARTING_FREEZE = 1,
614 SFS_FROZEN = 2,
615 };
616
617 #define GFS2_FSNAME_LEN 256
618
619 struct gfs2_inum_host {
620 u64 no_formal_ino;
621 u64 no_addr;
622 };
623
624 struct gfs2_sb_host {
625 u32 sb_magic;
626 u32 sb_type;
627
628 u32 sb_fs_format;
629 u32 sb_multihost_format;
630 u32 sb_bsize;
631 u32 sb_bsize_shift;
632
633 struct gfs2_inum_host sb_master_dir;
634 struct gfs2_inum_host sb_root_dir;
635
636 char sb_lockproto[GFS2_LOCKNAME_LEN];
637 char sb_locktable[GFS2_LOCKNAME_LEN];
638 };
639
640 /*
641 * lm_mount() return values
642 *
643 * ls_jid - the journal ID this node should use
644 * ls_first - this node is the first to mount the file system
645 * ls_lockspace - lock module's context for this file system
646 * ls_ops - lock module's functions
647 */
648
649 struct lm_lockstruct {
650 int ls_jid;
651 unsigned int ls_first;
652 const struct lm_lockops *ls_ops;
653 dlm_lockspace_t *ls_dlm;
654
655 int ls_recover_jid_done; /* These two are deprecated, */
656 int ls_recover_jid_status; /* used previously by gfs_controld */
657
658 struct dlm_lksb ls_mounted_lksb; /* mounted_lock */
659 struct dlm_lksb ls_control_lksb; /* control_lock */
660 char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */
661 struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */
662 char *ls_lvb_bits;
663
664 spinlock_t ls_recover_spin; /* protects following fields */
665 unsigned long ls_recover_flags; /* DFL_ */
666 uint32_t ls_recover_mount; /* gen in first recover_done cb */
667 uint32_t ls_recover_start; /* gen in last recover_done cb */
668 uint32_t ls_recover_block; /* copy recover_start in last recover_prep */
669 uint32_t ls_recover_size; /* size of recover_submit, recover_result */
670 uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */
671 uint32_t *ls_recover_result; /* result of last jid recovery */
672 };
673
674 struct gfs2_pcpu_lkstats {
675 /* One struct for each glock type */
676 struct gfs2_lkstats lkstats[10];
677 };
678
679 /* List of local (per node) statfs inodes */
680 struct local_statfs_inode {
681 struct list_head si_list;
682 struct inode *si_sc_inode;
683 unsigned int si_jid; /* journal id this statfs inode corresponds to */
684 };
685
686 struct gfs2_sbd {
687 struct super_block *sd_vfs;
688 struct gfs2_pcpu_lkstats __percpu *sd_lkstats;
689 struct kobject sd_kobj;
690 struct completion sd_kobj_unregister;
691 unsigned long sd_flags; /* SDF_... */
692 struct gfs2_sb_host sd_sb;
693
694 /* Constants computed on mount */
695
696 u32 sd_fsb2bb;
697 u32 sd_fsb2bb_shift;
698 u32 sd_diptrs; /* Number of pointers in a dinode */
699 u32 sd_inptrs; /* Number of pointers in a indirect block */
700 u32 sd_ldptrs; /* Number of pointers in a log descriptor block */
701 u32 sd_jbsize; /* Size of a journaled data block */
702 u32 sd_hash_bsize; /* sizeof(exhash block) */
703 u32 sd_hash_bsize_shift;
704 u32 sd_hash_ptrs; /* Number of pointers in a hash block */
705 u32 sd_qc_per_block;
706 u32 sd_blocks_per_bitmap;
707 u32 sd_max_dirres; /* Max blocks needed to add a directory entry */
708 u32 sd_max_height; /* Max height of a file's metadata tree */
709 u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
710 u32 sd_max_dents_per_leaf; /* Max number of dirents in a leaf block */
711
712 struct gfs2_args sd_args; /* Mount arguments */
713 struct gfs2_tune sd_tune; /* Filesystem tuning structure */
714
715 /* Lock Stuff */
716
717 struct lm_lockstruct sd_lockstruct;
718 struct gfs2_holder sd_live_gh;
719 struct gfs2_glock *sd_rename_gl;
720 struct gfs2_glock *sd_freeze_gl;
721 struct work_struct sd_freeze_work;
722 wait_queue_head_t sd_glock_wait;
723 wait_queue_head_t sd_async_glock_wait;
724 atomic_t sd_glock_disposal;
725 struct completion sd_locking_init;
726 struct completion sd_wdack;
727 struct delayed_work sd_control_work;
728
729 /* Inode Stuff */
730
731 struct dentry *sd_master_dir;
732 struct dentry *sd_root_dir;
733
734 struct inode *sd_jindex;
735 struct inode *sd_statfs_inode;
736 struct inode *sd_sc_inode;
737 struct list_head sd_sc_inodes_list;
738 struct inode *sd_qc_inode;
739 struct inode *sd_rindex;
740 struct inode *sd_quota_inode;
741
742 /* StatFS stuff */
743
744 spinlock_t sd_statfs_spin;
745 struct gfs2_statfs_change_host sd_statfs_master;
746 struct gfs2_statfs_change_host sd_statfs_local;
747 int sd_statfs_force_sync;
748
749 /* Resource group stuff */
750
751 int sd_rindex_uptodate;
752 spinlock_t sd_rindex_spin;
753 struct rb_root sd_rindex_tree;
754 unsigned int sd_rgrps;
755 unsigned int sd_max_rg_data;
756
757 /* Journal index stuff */
758
759 struct list_head sd_jindex_list;
760 spinlock_t sd_jindex_spin;
761 struct mutex sd_jindex_mutex;
762 unsigned int sd_journals;
763
764 struct gfs2_jdesc *sd_jdesc;
765 struct gfs2_holder sd_journal_gh;
766 struct gfs2_holder sd_jinode_gh;
767 struct gfs2_glock *sd_jinode_gl;
768
769 struct gfs2_holder sd_sc_gh;
770 struct buffer_head *sd_sc_bh;
771 struct gfs2_holder sd_qc_gh;
772
773 struct completion sd_journal_ready;
774
775 /* Daemon stuff */
776
777 struct task_struct *sd_logd_process;
778 struct task_struct *sd_quotad_process;
779
780 /* Quota stuff */
781
782 struct list_head sd_quota_list;
783 atomic_t sd_quota_count;
784 struct mutex sd_quota_mutex;
785 struct mutex sd_quota_sync_mutex;
786 wait_queue_head_t sd_quota_wait;
787 struct list_head sd_trunc_list;
788 spinlock_t sd_trunc_lock;
789
790 unsigned int sd_quota_slots;
791 unsigned long *sd_quota_bitmap;
792 spinlock_t sd_bitmap_lock;
793
794 u64 sd_quota_sync_gen;
795
796 /* Log stuff */
797
798 struct address_space sd_aspace;
799
800 spinlock_t sd_log_lock;
801
802 struct gfs2_trans *sd_log_tr;
803 unsigned int sd_log_blks_reserved;
804
805 atomic_t sd_log_pinned;
806 unsigned int sd_log_num_revoke;
807
808 struct list_head sd_log_revokes;
809 struct list_head sd_log_ordered;
810 spinlock_t sd_ordered_lock;
811
812 atomic_t sd_log_thresh1;
813 atomic_t sd_log_thresh2;
814 atomic_t sd_log_blks_free;
815 atomic_t sd_log_blks_needed;
816 atomic_t sd_log_revokes_available;
817 wait_queue_head_t sd_log_waitq;
818 wait_queue_head_t sd_logd_waitq;
819
820 u64 sd_log_sequence;
821 int sd_log_idle;
822
823 struct rw_semaphore sd_log_flush_lock;
824 atomic_t sd_log_in_flight;
825 wait_queue_head_t sd_log_flush_wait;
826 int sd_log_error; /* First log error */
827 wait_queue_head_t sd_withdraw_wait;
828
829 unsigned int sd_log_tail;
830 unsigned int sd_log_flush_tail;
831 unsigned int sd_log_head;
832 unsigned int sd_log_flush_head;
833
834 spinlock_t sd_ail_lock;
835 struct list_head sd_ail1_list;
836 struct list_head sd_ail2_list;
837
838 /* For quiescing the filesystem */
839 struct gfs2_holder sd_freeze_gh;
840 atomic_t sd_freeze_state;
841 struct mutex sd_freeze_mutex;
842
843 char sd_fsname[GFS2_FSNAME_LEN + 3 * sizeof(int) + 2];
844 char sd_table_name[GFS2_FSNAME_LEN];
845 char sd_proto_name[GFS2_FSNAME_LEN];
846
847 /* Debugging crud */
848
849 unsigned long sd_last_warning;
850 struct dentry *debugfs_dir; /* debugfs directory */
851 unsigned long sd_glock_dqs_held;
852 };
853
gfs2_glstats_inc(struct gfs2_glock * gl,int which)854 static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which)
855 {
856 gl->gl_stats.stats[which]++;
857 }
858
gfs2_sbstats_inc(const struct gfs2_glock * gl,int which)859 static inline void gfs2_sbstats_inc(const struct gfs2_glock *gl, int which)
860 {
861 const struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
862 preempt_disable();
863 this_cpu_ptr(sdp->sd_lkstats)->lkstats[gl->gl_name.ln_type].stats[which]++;
864 preempt_enable();
865 }
866
867 extern struct gfs2_rgrpd *gfs2_glock2rgrp(struct gfs2_glock *gl);
868
gfs2_max_stuffed_size(const struct gfs2_inode * ip)869 static inline unsigned gfs2_max_stuffed_size(const struct gfs2_inode *ip)
870 {
871 return GFS2_SB(&ip->i_inode)->sd_sb.sb_bsize - sizeof(struct gfs2_dinode);
872 }
873
874 #endif /* __INCORE_DOT_H__ */
875
876