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/workqueue.h>
15
16 #define DIO_WAIT 0x00000010
17 #define DIO_METADATA 0x00000020
18 #define DIO_ALL 0x00000100
19
20 struct gfs2_log_operations;
21 struct gfs2_log_element;
22 struct gfs2_holder;
23 struct gfs2_glock;
24 struct gfs2_quota_data;
25 struct gfs2_trans;
26 struct gfs2_ail;
27 struct gfs2_jdesc;
28 struct gfs2_sbd;
29
30 typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
31
32 struct gfs2_log_header_host {
33 u64 lh_sequence; /* Sequence number of this transaction */
34 u32 lh_flags; /* GFS2_LOG_HEAD_... */
35 u32 lh_tail; /* Block number of log tail */
36 u32 lh_blkno;
37 u32 lh_hash;
38 };
39
40 /*
41 * Structure of operations that are associated with each
42 * type of element in the log.
43 */
44
45 struct gfs2_log_operations {
46 void (*lo_add) (struct gfs2_sbd *sdp, struct gfs2_log_element *le);
47 void (*lo_before_commit) (struct gfs2_sbd *sdp);
48 void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_ail *ai);
49 void (*lo_before_scan) (struct gfs2_jdesc *jd,
50 struct gfs2_log_header_host *head, int pass);
51 int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start,
52 struct gfs2_log_descriptor *ld, __be64 *ptr,
53 int pass);
54 void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass);
55 const char *lo_name;
56 };
57
58 struct gfs2_log_element {
59 struct list_head le_list;
60 const struct gfs2_log_operations *le_ops;
61 };
62
63 struct gfs2_bitmap {
64 struct buffer_head *bi_bh;
65 char *bi_clone;
66 u32 bi_offset;
67 u32 bi_start;
68 u32 bi_len;
69 };
70
71 struct gfs2_rgrpd {
72 struct list_head rd_list; /* Link with superblock */
73 struct list_head rd_list_mru;
74 struct gfs2_glock *rd_gl; /* Glock for this rgrp */
75 u64 rd_addr; /* grp block disk address */
76 u64 rd_data0; /* first data location */
77 u32 rd_length; /* length of rgrp header in fs blocks */
78 u32 rd_data; /* num of data blocks in rgrp */
79 u32 rd_bitbytes; /* number of bytes in data bitmaps */
80 u32 rd_free;
81 u32 rd_free_clone;
82 u32 rd_dinodes;
83 u64 rd_igeneration;
84 struct gfs2_bitmap *rd_bits;
85 struct mutex rd_mutex;
86 struct gfs2_log_element rd_le;
87 struct gfs2_sbd *rd_sbd;
88 unsigned int rd_bh_count;
89 u32 rd_last_alloc;
90 unsigned char rd_flags;
91 #define GFS2_RDF_CHECK 0x01 /* Need to check for unlinked inodes */
92 #define GFS2_RDF_NOALLOC 0x02 /* rg prohibits allocation */
93 #define GFS2_RDF_UPTODATE 0x04 /* rg is up to date */
94 };
95
96 enum gfs2_state_bits {
97 BH_Pinned = BH_PrivateStart,
98 BH_Escaped = BH_PrivateStart + 1,
99 };
100
101 BUFFER_FNS(Pinned, pinned)
102 TAS_BUFFER_FNS(Pinned, pinned)
103 BUFFER_FNS(Escaped, escaped)
104 TAS_BUFFER_FNS(Escaped, escaped)
105
106 struct gfs2_bufdata {
107 struct buffer_head *bd_bh;
108 struct gfs2_glock *bd_gl;
109
110 union {
111 struct list_head list_tr;
112 u64 blkno;
113 } u;
114 #define bd_list_tr u.list_tr
115 #define bd_blkno u.blkno
116
117 struct gfs2_log_element bd_le;
118
119 struct gfs2_ail *bd_ail;
120 struct list_head bd_ail_st_list;
121 struct list_head bd_ail_gl_list;
122 };
123
124 struct gfs2_glock_operations {
125 void (*go_xmote_th) (struct gfs2_glock *gl);
126 int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);
127 void (*go_inval) (struct gfs2_glock *gl, int flags);
128 int (*go_demote_ok) (const struct gfs2_glock *gl);
129 int (*go_lock) (struct gfs2_holder *gh);
130 void (*go_unlock) (struct gfs2_holder *gh);
131 int (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl);
132 const int go_type;
133 const unsigned long go_min_hold_time;
134 };
135
136 enum {
137 /* States */
138 HIF_HOLDER = 6, /* Set for gh that "holds" the glock */
139 HIF_FIRST = 7,
140 HIF_WAIT = 10,
141 };
142
143 struct gfs2_holder {
144 struct list_head gh_list;
145
146 struct gfs2_glock *gh_gl;
147 struct pid *gh_owner_pid;
148 unsigned int gh_state;
149 unsigned gh_flags;
150
151 int gh_error;
152 unsigned long gh_iflags; /* HIF_... */
153 unsigned long gh_ip;
154 };
155
156 enum {
157 GLF_LOCK = 1,
158 GLF_DEMOTE = 3,
159 GLF_PENDING_DEMOTE = 4,
160 GLF_DEMOTE_IN_PROGRESS = 5,
161 GLF_DIRTY = 6,
162 GLF_LFLUSH = 7,
163 GLF_INVALIDATE_IN_PROGRESS = 8,
164 GLF_REPLY_PENDING = 9,
165 };
166
167 struct gfs2_glock {
168 struct hlist_node gl_list;
169 unsigned long gl_flags; /* GLF_... */
170 struct lm_lockname gl_name;
171 atomic_t gl_ref;
172
173 spinlock_t gl_spin;
174
175 unsigned int gl_state;
176 unsigned int gl_target;
177 unsigned int gl_reply;
178 unsigned int gl_hash;
179 unsigned int gl_demote_state; /* state requested by remote node */
180 unsigned long gl_demote_time; /* time of first demote request */
181 struct list_head gl_holders;
182
183 const struct gfs2_glock_operations *gl_ops;
184 void *gl_lock;
185 char *gl_lvb;
186 atomic_t gl_lvb_count;
187
188 unsigned long gl_stamp;
189 unsigned long gl_tchange;
190 void *gl_object;
191
192 struct list_head gl_lru;
193
194 struct gfs2_sbd *gl_sbd;
195
196 struct inode *gl_aspace;
197 struct list_head gl_ail_list;
198 atomic_t gl_ail_count;
199 struct delayed_work gl_work;
200 };
201
202 #define GFS2_MIN_LVB_SIZE 32 /* Min size of LVB that gfs2 supports */
203
204 struct gfs2_alloc {
205 /* Quota stuff */
206
207 struct gfs2_quota_data *al_qd[2*MAXQUOTAS];
208 struct gfs2_holder al_qd_ghs[2*MAXQUOTAS];
209 unsigned int al_qd_num;
210
211 u32 al_requested; /* Filled in by caller of gfs2_inplace_reserve() */
212 u32 al_alloced; /* Filled in by gfs2_alloc_*() */
213
214 /* Filled in by gfs2_inplace_reserve() */
215
216 unsigned int al_line;
217 char *al_file;
218 struct gfs2_holder al_ri_gh;
219 struct gfs2_holder al_rgd_gh;
220 struct gfs2_rgrpd *al_rgd;
221
222 };
223
224 enum {
225 GIF_INVALID = 0,
226 GIF_QD_LOCKED = 1,
227 GIF_SW_PAGED = 3,
228 GIF_USER = 4, /* user inode, not metadata addr space */
229 };
230
231
232 struct gfs2_inode {
233 struct inode i_inode;
234 u64 i_no_addr;
235 u64 i_no_formal_ino;
236 u64 i_generation;
237 u64 i_eattr;
238 loff_t i_disksize;
239 unsigned long i_flags; /* GIF_... */
240 struct gfs2_glock *i_gl; /* Move into i_gh? */
241 struct gfs2_holder i_iopen_gh;
242 struct gfs2_holder i_gh; /* for prepare/commit_write only */
243 struct gfs2_alloc *i_alloc;
244 u64 i_goal; /* goal block for allocations */
245 struct rw_semaphore i_rw_mutex;
246 struct list_head i_trunc_list;
247 u32 i_entries;
248 u32 i_diskflags;
249 u8 i_height;
250 u8 i_depth;
251 };
252
253 /*
254 * Since i_inode is the first element of struct gfs2_inode,
255 * this is effectively a cast.
256 */
GFS2_I(struct inode * inode)257 static inline struct gfs2_inode *GFS2_I(struct inode *inode)
258 {
259 return container_of(inode, struct gfs2_inode, i_inode);
260 }
261
GFS2_SB(const struct inode * inode)262 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
263 {
264 return inode->i_sb->s_fs_info;
265 }
266
267 struct gfs2_file {
268 struct mutex f_fl_mutex;
269 struct gfs2_holder f_fl_gh;
270 };
271
272 struct gfs2_revoke_replay {
273 struct list_head rr_list;
274 u64 rr_blkno;
275 unsigned int rr_where;
276 };
277
278 enum {
279 QDF_USER = 0,
280 QDF_CHANGE = 1,
281 QDF_LOCKED = 2,
282 };
283
284 struct gfs2_quota_data {
285 struct list_head qd_list;
286 unsigned int qd_count;
287
288 u32 qd_id;
289 unsigned long qd_flags; /* QDF_... */
290
291 s64 qd_change;
292 s64 qd_change_sync;
293
294 unsigned int qd_slot;
295 unsigned int qd_slot_count;
296
297 struct buffer_head *qd_bh;
298 struct gfs2_quota_change *qd_bh_qc;
299 unsigned int qd_bh_count;
300
301 struct gfs2_glock *qd_gl;
302 struct gfs2_quota_lvb qd_qb;
303
304 u64 qd_sync_gen;
305 unsigned long qd_last_warn;
306 unsigned long qd_last_touched;
307 };
308
309 struct gfs2_trans {
310 unsigned long tr_ip;
311
312 unsigned int tr_blocks;
313 unsigned int tr_revokes;
314 unsigned int tr_reserved;
315
316 struct gfs2_holder tr_t_gh;
317
318 int tr_touched;
319
320 unsigned int tr_num_buf;
321 unsigned int tr_num_buf_new;
322 unsigned int tr_num_databuf_new;
323 unsigned int tr_num_buf_rm;
324 unsigned int tr_num_databuf_rm;
325 struct list_head tr_list_buf;
326
327 unsigned int tr_num_revoke;
328 unsigned int tr_num_revoke_rm;
329 };
330
331 struct gfs2_ail {
332 struct list_head ai_list;
333
334 unsigned int ai_first;
335 struct list_head ai_ail1_list;
336 struct list_head ai_ail2_list;
337
338 u64 ai_sync_gen;
339 };
340
341 struct gfs2_journal_extent {
342 struct list_head extent_list;
343
344 unsigned int lblock; /* First logical block */
345 u64 dblock; /* First disk block */
346 u64 blocks;
347 };
348
349 struct gfs2_jdesc {
350 struct list_head jd_list;
351 struct list_head extent_list;
352
353 struct inode *jd_inode;
354 unsigned int jd_jid;
355 int jd_dirty;
356
357 unsigned int jd_blocks;
358 };
359
360 struct gfs2_statfs_change_host {
361 s64 sc_total;
362 s64 sc_free;
363 s64 sc_dinodes;
364 };
365
366 #define GFS2_GLOCKD_DEFAULT 1
367 #define GFS2_GLOCKD_MAX 16
368
369 #define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF
370 #define GFS2_QUOTA_OFF 0
371 #define GFS2_QUOTA_ACCOUNT 1
372 #define GFS2_QUOTA_ON 2
373
374 #define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED
375 #define GFS2_DATA_WRITEBACK 1
376 #define GFS2_DATA_ORDERED 2
377
378 struct gfs2_args {
379 char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
380 char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
381 char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
382 unsigned int ar_spectator:1; /* Don't get a journal */
383 unsigned int ar_ignore_local_fs:1; /* Ignore optimisations */
384 unsigned int ar_localflocks:1; /* Let the VFS do flock|fcntl */
385 unsigned int ar_localcaching:1; /* Local caching */
386 unsigned int ar_debug:1; /* Oops on errors */
387 unsigned int ar_upgrade:1; /* Upgrade ondisk format */
388 unsigned int ar_posix_acl:1; /* Enable posix acls */
389 unsigned int ar_quota:2; /* off/account/on */
390 unsigned int ar_suiddir:1; /* suiddir support */
391 unsigned int ar_data:2; /* ordered/writeback */
392 unsigned int ar_meta:1; /* mount metafs */
393 unsigned int ar_num_glockd; /* Number of glockd threads */
394 };
395
396 struct gfs2_tune {
397 spinlock_t gt_spin;
398
399 unsigned int gt_incore_log_blocks;
400 unsigned int gt_log_flush_secs;
401
402 unsigned int gt_recoverd_secs;
403 unsigned int gt_logd_secs;
404
405 unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
406 unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
407 unsigned int gt_quota_scale_num; /* Numerator */
408 unsigned int gt_quota_scale_den; /* Denominator */
409 unsigned int gt_quota_cache_secs;
410 unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
411 unsigned int gt_new_files_jdata;
412 unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
413 unsigned int gt_stall_secs; /* Detects trouble! */
414 unsigned int gt_complain_secs;
415 unsigned int gt_statfs_quantum;
416 unsigned int gt_statfs_slow;
417 };
418
419 enum {
420 SDF_JOURNAL_CHECKED = 0,
421 SDF_JOURNAL_LIVE = 1,
422 SDF_SHUTDOWN = 2,
423 SDF_NOBARRIERS = 3,
424 };
425
426 #define GFS2_FSNAME_LEN 256
427
428 struct gfs2_inum_host {
429 u64 no_formal_ino;
430 u64 no_addr;
431 };
432
433 struct gfs2_sb_host {
434 u32 sb_magic;
435 u32 sb_type;
436 u32 sb_format;
437
438 u32 sb_fs_format;
439 u32 sb_multihost_format;
440 u32 sb_bsize;
441 u32 sb_bsize_shift;
442
443 struct gfs2_inum_host sb_master_dir;
444 struct gfs2_inum_host sb_root_dir;
445
446 char sb_lockproto[GFS2_LOCKNAME_LEN];
447 char sb_locktable[GFS2_LOCKNAME_LEN];
448 };
449
450 struct gfs2_sbd {
451 struct super_block *sd_vfs;
452 struct kobject sd_kobj;
453 unsigned long sd_flags; /* SDF_... */
454 struct gfs2_sb_host sd_sb;
455
456 /* Constants computed on mount */
457
458 u32 sd_fsb2bb;
459 u32 sd_fsb2bb_shift;
460 u32 sd_diptrs; /* Number of pointers in a dinode */
461 u32 sd_inptrs; /* Number of pointers in a indirect block */
462 u32 sd_jbsize; /* Size of a journaled data block */
463 u32 sd_hash_bsize; /* sizeof(exhash block) */
464 u32 sd_hash_bsize_shift;
465 u32 sd_hash_ptrs; /* Number of pointers in a hash block */
466 u32 sd_qc_per_block;
467 u32 sd_max_dirres; /* Max blocks needed to add a directory entry */
468 u32 sd_max_height; /* Max height of a file's metadata tree */
469 u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
470 u32 sd_max_jheight; /* Max height of journaled file's meta tree */
471 u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1];
472
473 struct gfs2_args sd_args; /* Mount arguments */
474 struct gfs2_tune sd_tune; /* Filesystem tuning structure */
475
476 /* Lock Stuff */
477
478 struct lm_lockstruct sd_lockstruct;
479 struct gfs2_holder sd_live_gh;
480 struct gfs2_glock *sd_rename_gl;
481 struct gfs2_glock *sd_trans_gl;
482
483 /* Inode Stuff */
484
485 struct dentry *sd_master_dir;
486 struct dentry *sd_root_dir;
487
488 struct inode *sd_jindex;
489 struct inode *sd_inum_inode;
490 struct inode *sd_statfs_inode;
491 struct inode *sd_ir_inode;
492 struct inode *sd_sc_inode;
493 struct inode *sd_qc_inode;
494 struct inode *sd_rindex;
495 struct inode *sd_quota_inode;
496
497 /* Inum stuff */
498
499 struct mutex sd_inum_mutex;
500
501 /* StatFS stuff */
502
503 spinlock_t sd_statfs_spin;
504 struct gfs2_statfs_change_host sd_statfs_master;
505 struct gfs2_statfs_change_host sd_statfs_local;
506
507 /* Resource group stuff */
508
509 int sd_rindex_uptodate;
510 spinlock_t sd_rindex_spin;
511 struct mutex sd_rindex_mutex;
512 struct list_head sd_rindex_list;
513 struct list_head sd_rindex_mru_list;
514 struct gfs2_rgrpd *sd_rindex_forward;
515 unsigned int sd_rgrps;
516
517 /* Journal index stuff */
518
519 struct list_head sd_jindex_list;
520 spinlock_t sd_jindex_spin;
521 struct mutex sd_jindex_mutex;
522 unsigned int sd_journals;
523 unsigned long sd_jindex_refresh_time;
524
525 struct gfs2_jdesc *sd_jdesc;
526 struct gfs2_holder sd_journal_gh;
527 struct gfs2_holder sd_jinode_gh;
528
529 struct gfs2_holder sd_ir_gh;
530 struct gfs2_holder sd_sc_gh;
531 struct gfs2_holder sd_qc_gh;
532
533 /* Daemon stuff */
534
535 struct task_struct *sd_recoverd_process;
536 struct task_struct *sd_logd_process;
537 struct task_struct *sd_quotad_process;
538
539 /* Quota stuff */
540
541 struct list_head sd_quota_list;
542 atomic_t sd_quota_count;
543 spinlock_t sd_quota_spin;
544 struct mutex sd_quota_mutex;
545 wait_queue_head_t sd_quota_wait;
546 struct list_head sd_trunc_list;
547 spinlock_t sd_trunc_lock;
548
549 unsigned int sd_quota_slots;
550 unsigned int sd_quota_chunks;
551 unsigned char **sd_quota_bitmap;
552
553 u64 sd_quota_sync_gen;
554
555 /* Log stuff */
556
557 spinlock_t sd_log_lock;
558
559 unsigned int sd_log_blks_reserved;
560 unsigned int sd_log_commited_buf;
561 unsigned int sd_log_commited_databuf;
562 unsigned int sd_log_commited_revoke;
563
564 unsigned int sd_log_num_buf;
565 unsigned int sd_log_num_revoke;
566 unsigned int sd_log_num_rg;
567 unsigned int sd_log_num_databuf;
568
569 struct list_head sd_log_le_buf;
570 struct list_head sd_log_le_revoke;
571 struct list_head sd_log_le_rg;
572 struct list_head sd_log_le_databuf;
573 struct list_head sd_log_le_ordered;
574
575 atomic_t sd_log_blks_free;
576 struct mutex sd_log_reserve_mutex;
577
578 u64 sd_log_sequence;
579 unsigned int sd_log_head;
580 unsigned int sd_log_tail;
581 int sd_log_idle;
582
583 unsigned long sd_log_flush_time;
584 struct rw_semaphore sd_log_flush_lock;
585 atomic_t sd_log_in_flight;
586 wait_queue_head_t sd_log_flush_wait;
587
588 unsigned int sd_log_flush_head;
589 u64 sd_log_flush_wrapped;
590
591 struct list_head sd_ail1_list;
592 struct list_head sd_ail2_list;
593 u64 sd_ail_sync_gen;
594
595 /* Replay stuff */
596
597 struct list_head sd_revoke_list;
598 unsigned int sd_replay_tail;
599
600 unsigned int sd_found_blocks;
601 unsigned int sd_found_revokes;
602 unsigned int sd_replayed_blocks;
603
604 /* For quiescing the filesystem */
605
606 struct gfs2_holder sd_freeze_gh;
607 struct mutex sd_freeze_lock;
608 unsigned int sd_freeze_count;
609
610 char sd_fsname[GFS2_FSNAME_LEN];
611 char sd_table_name[GFS2_FSNAME_LEN];
612 char sd_proto_name[GFS2_FSNAME_LEN];
613
614 /* Debugging crud */
615
616 unsigned long sd_last_warning;
617 struct dentry *debugfs_dir; /* debugfs directory */
618 struct dentry *debugfs_dentry_glocks; /* for debugfs */
619 };
620
621 #endif /* __INCORE_DOT_H__ */
622
623