ia64/kvm: compilation fix. export account_system_vtime.
[pv_ops_mirror.git] / fs / gfs2 / incore.h
blob9c2c0b90b22a2e1c041d745a7386752a0399529b
1 /*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
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 */
10 #ifndef __INCORE_DOT_H__
11 #define __INCORE_DOT_H__
13 #include <linux/fs.h>
14 #include <linux/workqueue.h>
16 #define DIO_WAIT 0x00000010
17 #define DIO_METADATA 0x00000020
18 #define DIO_ALL 0x00000100
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;
30 typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
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;
41 * Structure of operations that are associated with each
42 * type of element in the log.
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;
58 struct gfs2_log_element {
59 struct list_head le_list;
60 const struct gfs2_log_operations *le_ops;
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;
71 struct gfs2_rgrp_host {
72 u32 rg_free;
73 u32 rg_dinodes;
74 u64 rg_igeneration;
77 struct gfs2_rgrpd {
78 struct list_head rd_list; /* Link with superblock */
79 struct list_head rd_list_mru;
80 struct list_head rd_recent; /* Recently used rgrps */
81 struct gfs2_glock *rd_gl; /* Glock for this rgrp */
82 u64 rd_addr; /* grp block disk address */
83 u64 rd_data0; /* first data location */
84 u32 rd_length; /* length of rgrp header in fs blocks */
85 u32 rd_data; /* num of data blocks in rgrp */
86 u32 rd_bitbytes; /* number of bytes in data bitmaps */
87 struct gfs2_rgrp_host rd_rg;
88 struct gfs2_bitmap *rd_bits;
89 unsigned int rd_bh_count;
90 struct mutex rd_mutex;
91 u32 rd_free_clone;
92 struct gfs2_log_element rd_le;
93 u32 rd_last_alloc;
94 struct gfs2_sbd *rd_sbd;
95 unsigned char rd_flags;
96 #define GFS2_RDF_CHECK 0x01 /* Need to check for unlinked inodes */
97 #define GFS2_RDF_NOALLOC 0x02 /* rg prohibits allocation */
98 #define GFS2_RDF_UPTODATE 0x04 /* rg is up to date */
101 enum gfs2_state_bits {
102 BH_Pinned = BH_PrivateStart,
103 BH_Escaped = BH_PrivateStart + 1,
106 BUFFER_FNS(Pinned, pinned)
107 TAS_BUFFER_FNS(Pinned, pinned)
108 BUFFER_FNS(Escaped, escaped)
109 TAS_BUFFER_FNS(Escaped, escaped)
111 struct gfs2_bufdata {
112 struct buffer_head *bd_bh;
113 struct gfs2_glock *bd_gl;
115 union {
116 struct list_head list_tr;
117 u64 blkno;
118 } u;
119 #define bd_list_tr u.list_tr
120 #define bd_blkno u.blkno
122 struct gfs2_log_element bd_le;
124 struct gfs2_ail *bd_ail;
125 struct list_head bd_ail_st_list;
126 struct list_head bd_ail_gl_list;
129 struct gfs2_glock_operations {
130 void (*go_xmote_th) (struct gfs2_glock *gl);
131 void (*go_xmote_bh) (struct gfs2_glock *gl);
132 void (*go_inval) (struct gfs2_glock *gl, int flags);
133 int (*go_demote_ok) (struct gfs2_glock *gl);
134 int (*go_lock) (struct gfs2_holder *gh);
135 void (*go_unlock) (struct gfs2_holder *gh);
136 const int go_type;
137 const unsigned long go_min_hold_time;
140 enum {
141 /* States */
142 HIF_HOLDER = 6,
143 HIF_FIRST = 7,
144 HIF_ABORTED = 9,
145 HIF_WAIT = 10,
148 struct gfs2_holder {
149 struct list_head gh_list;
151 struct gfs2_glock *gh_gl;
152 struct pid *gh_owner_pid;
153 unsigned int gh_state;
154 unsigned gh_flags;
156 int gh_error;
157 unsigned long gh_iflags;
158 unsigned long gh_ip;
161 enum {
162 GLF_LOCK = 1,
163 GLF_STICKY = 2,
164 GLF_DEMOTE = 3,
165 GLF_PENDING_DEMOTE = 4,
166 GLF_DIRTY = 5,
167 GLF_DEMOTE_IN_PROGRESS = 6,
168 GLF_LFLUSH = 7,
169 GLF_WAITERS2 = 8,
170 GLF_CONV_DEADLK = 9,
173 struct gfs2_glock {
174 struct hlist_node gl_list;
175 unsigned long gl_flags; /* GLF_... */
176 struct lm_lockname gl_name;
177 atomic_t gl_ref;
179 spinlock_t gl_spin;
181 unsigned int gl_state;
182 unsigned int gl_hash;
183 unsigned int gl_demote_state; /* state requested by remote node */
184 unsigned long gl_demote_time; /* time of first demote request */
185 struct pid *gl_owner_pid;
186 unsigned long gl_ip;
187 struct list_head gl_holders;
188 struct list_head gl_waiters1; /* HIF_MUTEX */
189 struct list_head gl_waiters3; /* HIF_PROMOTE */
191 const struct gfs2_glock_operations *gl_ops;
193 struct gfs2_holder *gl_req_gh;
195 void *gl_lock;
196 char *gl_lvb;
197 atomic_t gl_lvb_count;
199 unsigned long gl_stamp;
200 unsigned long gl_tchange;
201 void *gl_object;
203 struct list_head gl_reclaim;
205 struct gfs2_sbd *gl_sbd;
207 struct inode *gl_aspace;
208 struct list_head gl_ail_list;
209 atomic_t gl_ail_count;
210 struct delayed_work gl_work;
213 #define GFS2_MIN_LVB_SIZE 32 /* Min size of LVB that gfs2 supports */
215 struct gfs2_alloc {
216 /* Quota stuff */
218 struct gfs2_quota_data *al_qd[2*MAXQUOTAS];
219 struct gfs2_holder al_qd_ghs[2*MAXQUOTAS];
220 unsigned int al_qd_num;
222 u32 al_requested; /* Filled in by caller of gfs2_inplace_reserve() */
223 u32 al_alloced; /* Filled in by gfs2_alloc_*() */
225 /* Filled in by gfs2_inplace_reserve() */
227 unsigned int al_line;
228 char *al_file;
229 struct gfs2_holder al_ri_gh;
230 struct gfs2_holder al_rgd_gh;
231 struct gfs2_rgrpd *al_rgd;
235 enum {
236 GIF_INVALID = 0,
237 GIF_QD_LOCKED = 1,
238 GIF_SW_PAGED = 3,
241 struct gfs2_dinode_host {
242 u64 di_size; /* number of bytes in file */
243 u64 di_generation; /* generation number for NFS */
244 u32 di_flags; /* GFS2_DIF_... */
245 /* These only apply to directories */
246 u32 di_entries; /* The number of entries in the directory */
247 u64 di_eattr; /* extended attribute block number */
250 struct gfs2_inode {
251 struct inode i_inode;
252 u64 i_no_addr;
253 u64 i_no_formal_ino;
254 unsigned long i_flags; /* GIF_... */
256 struct gfs2_dinode_host i_di; /* To be replaced by ref to block */
258 struct gfs2_glock *i_gl; /* Move into i_gh? */
259 struct gfs2_holder i_iopen_gh;
260 struct gfs2_holder i_gh; /* for prepare/commit_write only */
261 struct gfs2_alloc *i_alloc;
262 u64 i_goal; /* goal block for allocations */
263 struct rw_semaphore i_rw_mutex;
264 u8 i_height;
265 u8 i_depth;
269 * Since i_inode is the first element of struct gfs2_inode,
270 * this is effectively a cast.
272 static inline struct gfs2_inode *GFS2_I(struct inode *inode)
274 return container_of(inode, struct gfs2_inode, i_inode);
277 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
279 return inode->i_sb->s_fs_info;
282 struct gfs2_file {
283 struct mutex f_fl_mutex;
284 struct gfs2_holder f_fl_gh;
287 struct gfs2_revoke_replay {
288 struct list_head rr_list;
289 u64 rr_blkno;
290 unsigned int rr_where;
293 enum {
294 QDF_USER = 0,
295 QDF_CHANGE = 1,
296 QDF_LOCKED = 2,
299 struct gfs2_quota_data {
300 struct list_head qd_list;
301 unsigned int qd_count;
303 u32 qd_id;
304 unsigned long qd_flags; /* QDF_... */
306 s64 qd_change;
307 s64 qd_change_sync;
309 unsigned int qd_slot;
310 unsigned int qd_slot_count;
312 struct buffer_head *qd_bh;
313 struct gfs2_quota_change *qd_bh_qc;
314 unsigned int qd_bh_count;
316 struct gfs2_glock *qd_gl;
317 struct gfs2_quota_lvb qd_qb;
319 u64 qd_sync_gen;
320 unsigned long qd_last_warn;
321 unsigned long qd_last_touched;
324 struct gfs2_trans {
325 unsigned long tr_ip;
327 unsigned int tr_blocks;
328 unsigned int tr_revokes;
329 unsigned int tr_reserved;
331 struct gfs2_holder tr_t_gh;
333 int tr_touched;
335 unsigned int tr_num_buf;
336 unsigned int tr_num_buf_new;
337 unsigned int tr_num_databuf_new;
338 unsigned int tr_num_buf_rm;
339 unsigned int tr_num_databuf_rm;
340 struct list_head tr_list_buf;
342 unsigned int tr_num_revoke;
343 unsigned int tr_num_revoke_rm;
346 struct gfs2_ail {
347 struct list_head ai_list;
349 unsigned int ai_first;
350 struct list_head ai_ail1_list;
351 struct list_head ai_ail2_list;
353 u64 ai_sync_gen;
356 struct gfs2_journal_extent {
357 struct list_head extent_list;
359 unsigned int lblock; /* First logical block */
360 u64 dblock; /* First disk block */
361 u64 blocks;
364 struct gfs2_jdesc {
365 struct list_head jd_list;
366 struct list_head extent_list;
368 struct inode *jd_inode;
369 unsigned int jd_jid;
370 int jd_dirty;
372 unsigned int jd_blocks;
375 struct gfs2_statfs_change_host {
376 s64 sc_total;
377 s64 sc_free;
378 s64 sc_dinodes;
381 #define GFS2_GLOCKD_DEFAULT 1
382 #define GFS2_GLOCKD_MAX 16
384 #define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF
385 #define GFS2_QUOTA_OFF 0
386 #define GFS2_QUOTA_ACCOUNT 1
387 #define GFS2_QUOTA_ON 2
389 #define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED
390 #define GFS2_DATA_WRITEBACK 1
391 #define GFS2_DATA_ORDERED 2
393 struct gfs2_args {
394 char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
395 char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
396 char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
397 int ar_spectator; /* Don't get a journal because we're always RO */
398 int ar_ignore_local_fs; /* Don't optimize even if local_fs is 1 */
399 int ar_localflocks; /* Let the VFS do flock|fcntl locks for us */
400 int ar_localcaching; /* Local-style caching (dangerous on multihost) */
401 int ar_debug; /* Oops on errors instead of trying to be graceful */
402 int ar_upgrade; /* Upgrade ondisk/multihost format */
403 unsigned int ar_num_glockd; /* Number of glockd threads */
404 int ar_posix_acl; /* Enable posix acls */
405 int ar_quota; /* off/account/on */
406 int ar_suiddir; /* suiddir support */
407 int ar_data; /* ordered/writeback */
410 struct gfs2_tune {
411 spinlock_t gt_spin;
413 unsigned int gt_demote_secs; /* Cache retention for unheld glock */
414 unsigned int gt_incore_log_blocks;
415 unsigned int gt_log_flush_secs;
417 unsigned int gt_recoverd_secs;
418 unsigned int gt_logd_secs;
419 unsigned int gt_quotad_secs;
421 unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
422 unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
423 unsigned int gt_quota_scale_num; /* Numerator */
424 unsigned int gt_quota_scale_den; /* Denominator */
425 unsigned int gt_quota_cache_secs;
426 unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
427 unsigned int gt_atime_quantum; /* Min secs between atime updates */
428 unsigned int gt_new_files_jdata;
429 unsigned int gt_new_files_directio;
430 unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
431 unsigned int gt_stall_secs; /* Detects trouble! */
432 unsigned int gt_complain_secs;
433 unsigned int gt_statfs_quantum;
434 unsigned int gt_statfs_slow;
437 enum {
438 SDF_JOURNAL_CHECKED = 0,
439 SDF_JOURNAL_LIVE = 1,
440 SDF_SHUTDOWN = 2,
441 SDF_NOATIME = 3,
444 #define GFS2_FSNAME_LEN 256
446 struct gfs2_inum_host {
447 u64 no_formal_ino;
448 u64 no_addr;
451 struct gfs2_sb_host {
452 u32 sb_magic;
453 u32 sb_type;
454 u32 sb_format;
456 u32 sb_fs_format;
457 u32 sb_multihost_format;
458 u32 sb_bsize;
459 u32 sb_bsize_shift;
461 struct gfs2_inum_host sb_master_dir;
462 struct gfs2_inum_host sb_root_dir;
464 char sb_lockproto[GFS2_LOCKNAME_LEN];
465 char sb_locktable[GFS2_LOCKNAME_LEN];
468 struct gfs2_sbd {
469 struct super_block *sd_vfs;
470 struct super_block *sd_vfs_meta;
471 struct kobject sd_kobj;
472 unsigned long sd_flags; /* SDF_... */
473 struct gfs2_sb_host sd_sb;
475 /* Constants computed on mount */
477 u32 sd_fsb2bb;
478 u32 sd_fsb2bb_shift;
479 u32 sd_diptrs; /* Number of pointers in a dinode */
480 u32 sd_inptrs; /* Number of pointers in a indirect block */
481 u32 sd_jbsize; /* Size of a journaled data block */
482 u32 sd_hash_bsize; /* sizeof(exhash block) */
483 u32 sd_hash_bsize_shift;
484 u32 sd_hash_ptrs; /* Number of pointers in a hash block */
485 u32 sd_qc_per_block;
486 u32 sd_max_dirres; /* Max blocks needed to add a directory entry */
487 u32 sd_max_height; /* Max height of a file's metadata tree */
488 u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
489 u32 sd_max_jheight; /* Max height of journaled file's meta tree */
490 u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1];
492 struct gfs2_args sd_args; /* Mount arguments */
493 struct gfs2_tune sd_tune; /* Filesystem tuning structure */
495 /* Lock Stuff */
497 struct lm_lockstruct sd_lockstruct;
498 struct list_head sd_reclaim_list;
499 spinlock_t sd_reclaim_lock;
500 wait_queue_head_t sd_reclaim_wq;
501 atomic_t sd_reclaim_count;
502 struct gfs2_holder sd_live_gh;
503 struct gfs2_glock *sd_rename_gl;
504 struct gfs2_glock *sd_trans_gl;
506 /* Inode Stuff */
508 struct inode *sd_master_dir;
509 struct inode *sd_jindex;
510 struct inode *sd_inum_inode;
511 struct inode *sd_statfs_inode;
512 struct inode *sd_ir_inode;
513 struct inode *sd_sc_inode;
514 struct inode *sd_qc_inode;
515 struct inode *sd_rindex;
516 struct inode *sd_quota_inode;
518 /* Inum stuff */
520 struct mutex sd_inum_mutex;
522 /* StatFS stuff */
524 spinlock_t sd_statfs_spin;
525 struct gfs2_statfs_change_host sd_statfs_master;
526 struct gfs2_statfs_change_host sd_statfs_local;
527 unsigned long sd_statfs_sync_time;
529 /* Resource group stuff */
531 int sd_rindex_uptodate;
532 spinlock_t sd_rindex_spin;
533 struct mutex sd_rindex_mutex;
534 struct list_head sd_rindex_list;
535 struct list_head sd_rindex_mru_list;
536 struct list_head sd_rindex_recent_list;
537 struct gfs2_rgrpd *sd_rindex_forward;
538 unsigned int sd_rgrps;
540 /* Journal index stuff */
542 struct list_head sd_jindex_list;
543 spinlock_t sd_jindex_spin;
544 struct mutex sd_jindex_mutex;
545 unsigned int sd_journals;
546 unsigned long sd_jindex_refresh_time;
548 struct gfs2_jdesc *sd_jdesc;
549 struct gfs2_holder sd_journal_gh;
550 struct gfs2_holder sd_jinode_gh;
552 struct gfs2_holder sd_ir_gh;
553 struct gfs2_holder sd_sc_gh;
554 struct gfs2_holder sd_qc_gh;
556 /* Daemon stuff */
558 struct task_struct *sd_recoverd_process;
559 struct task_struct *sd_logd_process;
560 struct task_struct *sd_quotad_process;
561 struct task_struct *sd_glockd_process[GFS2_GLOCKD_MAX];
562 unsigned int sd_glockd_num;
564 /* Quota stuff */
566 struct list_head sd_quota_list;
567 atomic_t sd_quota_count;
568 spinlock_t sd_quota_spin;
569 struct mutex sd_quota_mutex;
571 unsigned int sd_quota_slots;
572 unsigned int sd_quota_chunks;
573 unsigned char **sd_quota_bitmap;
575 u64 sd_quota_sync_gen;
576 unsigned long sd_quota_sync_time;
578 /* Log stuff */
580 spinlock_t sd_log_lock;
582 unsigned int sd_log_blks_reserved;
583 unsigned int sd_log_commited_buf;
584 unsigned int sd_log_commited_databuf;
585 unsigned int sd_log_commited_revoke;
587 unsigned int sd_log_num_buf;
588 unsigned int sd_log_num_revoke;
589 unsigned int sd_log_num_rg;
590 unsigned int sd_log_num_databuf;
592 struct list_head sd_log_le_buf;
593 struct list_head sd_log_le_revoke;
594 struct list_head sd_log_le_rg;
595 struct list_head sd_log_le_databuf;
596 struct list_head sd_log_le_ordered;
598 atomic_t sd_log_blks_free;
599 struct mutex sd_log_reserve_mutex;
601 u64 sd_log_sequence;
602 unsigned int sd_log_head;
603 unsigned int sd_log_tail;
604 int sd_log_idle;
606 unsigned long sd_log_flush_time;
607 struct rw_semaphore sd_log_flush_lock;
608 atomic_t sd_log_in_flight;
609 wait_queue_head_t sd_log_flush_wait;
611 unsigned int sd_log_flush_head;
612 u64 sd_log_flush_wrapped;
614 struct list_head sd_ail1_list;
615 struct list_head sd_ail2_list;
616 u64 sd_ail_sync_gen;
618 /* Replay stuff */
620 struct list_head sd_revoke_list;
621 unsigned int sd_replay_tail;
623 unsigned int sd_found_blocks;
624 unsigned int sd_found_revokes;
625 unsigned int sd_replayed_blocks;
627 /* For quiescing the filesystem */
629 struct gfs2_holder sd_freeze_gh;
630 struct mutex sd_freeze_lock;
631 unsigned int sd_freeze_count;
633 /* Counters */
635 atomic_t sd_reclaimed;
637 char sd_fsname[GFS2_FSNAME_LEN];
638 char sd_table_name[GFS2_FSNAME_LEN];
639 char sd_proto_name[GFS2_FSNAME_LEN];
641 /* Debugging crud */
643 unsigned long sd_last_warning;
644 struct vfsmount *sd_gfs2mnt;
645 struct dentry *debugfs_dir; /* debugfs directory */
646 struct dentry *debugfs_dentry_glocks; /* for debugfs */
649 #endif /* __INCORE_DOT_H__ */