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.
10 #ifndef __INCORE_DOT_H__
11 #define __INCORE_DOT_H__
14 #include <linux/kobject.h>
15 #include <linux/workqueue.h>
16 #include <linux/dlm.h>
17 #include <linux/buffer_head.h>
18 #include <linux/rcupdate.h>
19 #include <linux/rculist_bl.h>
20 #include <linux/completion.h>
22 #define DIO_WAIT 0x00000010
23 #define DIO_METADATA 0x00000020
25 struct gfs2_log_operations;
26 struct gfs2_log_element;
29 struct gfs2_quota_data;
36 typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
38 struct gfs2_log_header_host {
39 u64 lh_sequence; /* Sequence number of this transaction */
40 u32 lh_flags; /* GFS2_LOG_HEAD_... */
41 u32 lh_tail; /* Block number of log tail */
47 * Structure of operations that are associated with each
48 * type of element in the log.
51 struct gfs2_log_operations {
52 void (*lo_add) (struct gfs2_sbd *sdp, struct gfs2_log_element *le);
53 void (*lo_before_commit) (struct gfs2_sbd *sdp);
54 void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_ail *ai);
55 void (*lo_before_scan) (struct gfs2_jdesc *jd,
56 struct gfs2_log_header_host *head, int pass);
57 int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start,
58 struct gfs2_log_descriptor *ld, __be64 *ptr,
60 void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass);
64 struct gfs2_log_element {
65 struct list_head le_list;
66 const struct gfs2_log_operations *le_ops;
72 struct buffer_head *bi_bh;
74 unsigned long bi_flags;
81 struct list_head rd_list; /* Link with superblock */
82 struct list_head rd_list_mru;
83 struct gfs2_glock *rd_gl; /* Glock for this rgrp */
84 u64 rd_addr; /* grp block disk address */
85 u64 rd_data0; /* first data location */
86 u32 rd_length; /* length of rgrp header in fs blocks */
87 u32 rd_data; /* num of data blocks in rgrp */
88 u32 rd_bitbytes; /* number of bytes in data bitmaps */
93 struct gfs2_bitmap *rd_bits;
94 struct mutex rd_mutex;
95 struct gfs2_log_element rd_le;
96 struct gfs2_sbd *rd_sbd;
97 unsigned int rd_bh_count;
100 #define GFS2_RDF_CHECK 0x10000000 /* check for unlinked inodes */
101 #define GFS2_RDF_UPTODATE 0x20000000 /* rg is up to date */
102 #define GFS2_RDF_ERROR 0x40000000 /* error in rg */
103 #define GFS2_RDF_MASK 0xf0000000 /* mask for internal flags */
106 enum gfs2_state_bits {
107 BH_Pinned = BH_PrivateStart,
108 BH_Escaped = BH_PrivateStart + 1,
111 BUFFER_FNS(Pinned, pinned)
112 TAS_BUFFER_FNS(Pinned, pinned)
113 BUFFER_FNS(Escaped, escaped)
114 TAS_BUFFER_FNS(Escaped, escaped)
116 struct gfs2_bufdata {
117 struct buffer_head *bd_bh;
118 struct gfs2_glock *bd_gl;
121 struct list_head list_tr;
124 #define bd_list_tr u.list_tr
125 #define bd_blkno u.blkno
127 struct gfs2_log_element bd_le;
129 struct gfs2_ail *bd_ail;
130 struct list_head bd_ail_st_list;
131 struct list_head bd_ail_gl_list;
135 * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
136 * prefix of lock_dlm_ gets awkward.
139 #define GDLM_STRNAME_BYTES 25
140 #define GDLM_LVB_SIZE 32
148 unsigned int ln_type;
151 #define lm_name_equal(name1, name2) \
152 (((name1)->ln_number == (name2)->ln_number) && \
153 ((name1)->ln_type == (name2)->ln_type))
156 struct gfs2_glock_operations {
157 void (*go_xmote_th) (struct gfs2_glock *gl);
158 int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);
159 void (*go_inval) (struct gfs2_glock *gl, int flags);
160 int (*go_demote_ok) (const struct gfs2_glock *gl);
161 int (*go_lock) (struct gfs2_holder *gh);
162 void (*go_unlock) (struct gfs2_holder *gh);
163 int (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl);
164 void (*go_callback) (struct gfs2_glock *gl);
166 const unsigned long go_min_hold_time;
167 const unsigned long go_flags;
168 #define GLOF_ASPACE 1
173 HIF_HOLDER = 6, /* Set for gh that "holds" the glock */
179 struct list_head gh_list;
181 struct gfs2_glock *gh_gl;
182 struct pid *gh_owner_pid;
183 unsigned int gh_state;
187 unsigned long gh_iflags; /* HIF_... */
194 GLF_PENDING_DEMOTE = 4,
195 GLF_DEMOTE_IN_PROGRESS = 5,
198 GLF_INVALIDATE_IN_PROGRESS = 8,
199 GLF_REPLY_PENDING = 9,
204 GLF_OBJECT = 14, /* Used only for tracing */
208 struct hlist_bl_node gl_list;
209 unsigned long gl_flags; /* GLF_... */
210 struct lm_lockname gl_name;
215 /* State fields protected by gl_spin */
216 unsigned int gl_state:2, /* Current state */
217 gl_target:2, /* Target state */
218 gl_demote_state:2, /* State requested by remote node */
219 gl_req:2, /* State in last dlm request */
220 gl_reply:8; /* Last reply from the dlm */
222 unsigned int gl_hash;
223 unsigned long gl_demote_time; /* time of first demote request */
224 struct list_head gl_holders;
226 const struct gfs2_glock_operations *gl_ops;
227 char gl_strname[GDLM_STRNAME_BYTES];
228 struct dlm_lksb gl_lksb;
230 unsigned long gl_tchange;
233 struct list_head gl_lru;
235 struct gfs2_sbd *gl_sbd;
237 struct list_head gl_ail_list;
238 atomic_t gl_ail_count;
240 struct delayed_work gl_work;
241 struct work_struct gl_delete;
242 struct rcu_head gl_rcu;
245 #define GFS2_MIN_LVB_SIZE 32 /* Min size of LVB that gfs2 supports */
250 struct gfs2_quota_data *al_qd[2*MAXQUOTAS];
251 struct gfs2_holder al_qd_ghs[2*MAXQUOTAS];
252 unsigned int al_qd_num;
254 u32 al_requested; /* Filled in by caller of gfs2_inplace_reserve() */
255 u32 al_alloced; /* Filled in by gfs2_alloc_*() */
257 /* Filled in by gfs2_inplace_reserve() */
259 unsigned int al_line;
261 struct gfs2_holder al_ri_gh;
262 struct gfs2_holder al_rgd_gh;
263 struct gfs2_rgrpd *al_rgd;
275 struct inode i_inode;
280 unsigned long i_flags; /* GIF_... */
281 struct gfs2_glock *i_gl; /* Move into i_gh? */
282 struct gfs2_holder i_iopen_gh;
283 struct gfs2_holder i_gh; /* for prepare/commit_write only */
284 struct gfs2_alloc *i_alloc;
285 u64 i_goal; /* goal block for allocations */
286 struct rw_semaphore i_rw_mutex;
287 struct list_head i_trunc_list;
295 * Since i_inode is the first element of struct gfs2_inode,
296 * this is effectively a cast.
298 static inline struct gfs2_inode *GFS2_I(struct inode *inode)
300 return container_of(inode, struct gfs2_inode, i_inode);
303 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
305 return inode->i_sb->s_fs_info;
309 struct mutex f_fl_mutex;
310 struct gfs2_holder f_fl_gh;
313 struct gfs2_revoke_replay {
314 struct list_head rr_list;
316 unsigned int rr_where;
326 struct gfs2_quota_data {
327 struct list_head qd_list;
328 struct list_head qd_reclaim;
333 unsigned long qd_flags; /* QDF_... */
338 unsigned int qd_slot;
339 unsigned int qd_slot_count;
341 struct buffer_head *qd_bh;
342 struct gfs2_quota_change *qd_bh_qc;
343 unsigned int qd_bh_count;
345 struct gfs2_glock *qd_gl;
346 struct gfs2_quota_lvb qd_qb;
349 unsigned long qd_last_warn;
355 unsigned int tr_blocks;
356 unsigned int tr_revokes;
357 unsigned int tr_reserved;
359 struct gfs2_holder tr_t_gh;
363 unsigned int tr_num_buf;
364 unsigned int tr_num_buf_new;
365 unsigned int tr_num_databuf_new;
366 unsigned int tr_num_buf_rm;
367 unsigned int tr_num_databuf_rm;
368 struct list_head tr_list_buf;
370 unsigned int tr_num_revoke;
371 unsigned int tr_num_revoke_rm;
375 struct list_head ai_list;
377 unsigned int ai_first;
378 struct list_head ai_ail1_list;
379 struct list_head ai_ail2_list;
382 struct gfs2_journal_extent {
383 struct list_head extent_list;
385 unsigned int lblock; /* First logical block */
386 u64 dblock; /* First disk block */
391 struct list_head jd_list;
392 struct list_head extent_list;
393 struct work_struct jd_work;
394 struct inode *jd_inode;
395 unsigned long jd_flags;
396 #define JDF_RECOVERY 1
398 unsigned int jd_blocks;
401 struct gfs2_statfs_change_host {
407 #define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF
408 #define GFS2_QUOTA_OFF 0
409 #define GFS2_QUOTA_ACCOUNT 1
410 #define GFS2_QUOTA_ON 2
412 #define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED
413 #define GFS2_DATA_WRITEBACK 1
414 #define GFS2_DATA_ORDERED 2
416 #define GFS2_ERRORS_DEFAULT GFS2_ERRORS_WITHDRAW
417 #define GFS2_ERRORS_WITHDRAW 0
418 #define GFS2_ERRORS_CONTINUE 1 /* place holder for future feature */
419 #define GFS2_ERRORS_RO 2 /* place holder for future feature */
420 #define GFS2_ERRORS_PANIC 3
423 char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
424 char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
425 char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
426 unsigned int ar_spectator:1; /* Don't get a journal */
427 unsigned int ar_localflocks:1; /* Let the VFS do flock|fcntl */
428 unsigned int ar_debug:1; /* Oops on errors */
429 unsigned int ar_posix_acl:1; /* Enable posix acls */
430 unsigned int ar_quota:2; /* off/account/on */
431 unsigned int ar_suiddir:1; /* suiddir support */
432 unsigned int ar_data:2; /* ordered/writeback */
433 unsigned int ar_meta:1; /* mount metafs */
434 unsigned int ar_discard:1; /* discard requests */
435 unsigned int ar_errors:2; /* errors=withdraw | panic */
436 unsigned int ar_nobarrier:1; /* do not send barriers */
437 int ar_commit; /* Commit interval */
438 int ar_statfs_quantum; /* The fast statfs interval */
439 int ar_quota_quantum; /* The quota interval */
440 int ar_statfs_percent; /* The % change to force sync */
446 unsigned int gt_logd_secs;
448 unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
449 unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
450 unsigned int gt_quota_scale_num; /* Numerator */
451 unsigned int gt_quota_scale_den; /* Denominator */
452 unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
453 unsigned int gt_new_files_jdata;
454 unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
455 unsigned int gt_complain_secs;
456 unsigned int gt_statfs_quantum;
457 unsigned int gt_statfs_slow;
461 SDF_JOURNAL_CHECKED = 0,
462 SDF_JOURNAL_LIVE = 1,
470 #define GFS2_FSNAME_LEN 256
472 struct gfs2_inum_host {
477 struct gfs2_sb_host {
483 u32 sb_multihost_format;
487 struct gfs2_inum_host sb_master_dir;
488 struct gfs2_inum_host sb_root_dir;
490 char sb_lockproto[GFS2_LOCKNAME_LEN];
491 char sb_locktable[GFS2_LOCKNAME_LEN];
495 * lm_mount() return values
497 * ls_jid - the journal ID this node should use
498 * ls_first - this node is the first to mount the file system
499 * ls_lockspace - lock module's context for this file system
500 * ls_ops - lock module's functions
503 struct lm_lockstruct {
505 unsigned int ls_first;
506 unsigned int ls_first_done;
507 unsigned int ls_nodir;
508 const struct lm_lockops *ls_ops;
509 unsigned long ls_flags;
510 dlm_lockspace_t *ls_dlm;
512 int ls_recover_jid_done;
513 int ls_recover_jid_status;
517 struct super_block *sd_vfs;
518 struct kobject sd_kobj;
519 unsigned long sd_flags; /* SDF_... */
520 struct gfs2_sb_host sd_sb;
522 /* Constants computed on mount */
526 u32 sd_diptrs; /* Number of pointers in a dinode */
527 u32 sd_inptrs; /* Number of pointers in a indirect block */
528 u32 sd_jbsize; /* Size of a journaled data block */
529 u32 sd_hash_bsize; /* sizeof(exhash block) */
530 u32 sd_hash_bsize_shift;
531 u32 sd_hash_ptrs; /* Number of pointers in a hash block */
533 u32 sd_max_dirres; /* Max blocks needed to add a directory entry */
534 u32 sd_max_height; /* Max height of a file's metadata tree */
535 u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
536 u32 sd_max_jheight; /* Max height of journaled file's meta tree */
537 u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1];
539 struct gfs2_args sd_args; /* Mount arguments */
540 struct gfs2_tune sd_tune; /* Filesystem tuning structure */
544 struct lm_lockstruct sd_lockstruct;
545 struct gfs2_holder sd_live_gh;
546 struct gfs2_glock *sd_rename_gl;
547 struct gfs2_glock *sd_trans_gl;
548 wait_queue_head_t sd_glock_wait;
549 atomic_t sd_glock_disposal;
550 struct completion sd_locking_init;
554 struct dentry *sd_master_dir;
555 struct dentry *sd_root_dir;
557 struct inode *sd_jindex;
558 struct inode *sd_statfs_inode;
559 struct inode *sd_sc_inode;
560 struct inode *sd_qc_inode;
561 struct inode *sd_rindex;
562 struct inode *sd_quota_inode;
566 spinlock_t sd_statfs_spin;
567 struct gfs2_statfs_change_host sd_statfs_master;
568 struct gfs2_statfs_change_host sd_statfs_local;
569 int sd_statfs_force_sync;
571 /* Resource group stuff */
573 int sd_rindex_uptodate;
574 spinlock_t sd_rindex_spin;
575 struct mutex sd_rindex_mutex;
576 struct list_head sd_rindex_list;
577 struct list_head sd_rindex_mru_list;
578 struct gfs2_rgrpd *sd_rindex_forward;
579 unsigned int sd_rgrps;
580 unsigned int sd_max_rg_data;
582 /* Journal index stuff */
584 struct list_head sd_jindex_list;
585 spinlock_t sd_jindex_spin;
586 struct mutex sd_jindex_mutex;
587 unsigned int sd_journals;
589 struct gfs2_jdesc *sd_jdesc;
590 struct gfs2_holder sd_journal_gh;
591 struct gfs2_holder sd_jinode_gh;
593 struct gfs2_holder sd_sc_gh;
594 struct gfs2_holder sd_qc_gh;
598 struct task_struct *sd_logd_process;
599 struct task_struct *sd_quotad_process;
603 struct list_head sd_quota_list;
604 atomic_t sd_quota_count;
605 struct mutex sd_quota_mutex;
606 wait_queue_head_t sd_quota_wait;
607 struct list_head sd_trunc_list;
608 spinlock_t sd_trunc_lock;
610 unsigned int sd_quota_slots;
611 unsigned int sd_quota_chunks;
612 unsigned char **sd_quota_bitmap;
614 u64 sd_quota_sync_gen;
618 spinlock_t sd_log_lock;
620 unsigned int sd_log_blks_reserved;
621 unsigned int sd_log_commited_buf;
622 unsigned int sd_log_commited_databuf;
623 int sd_log_commited_revoke;
625 atomic_t sd_log_pinned;
626 unsigned int sd_log_num_buf;
627 unsigned int sd_log_num_revoke;
628 unsigned int sd_log_num_rg;
629 unsigned int sd_log_num_databuf;
631 struct list_head sd_log_le_buf;
632 struct list_head sd_log_le_revoke;
633 struct list_head sd_log_le_rg;
634 struct list_head sd_log_le_databuf;
635 struct list_head sd_log_le_ordered;
637 atomic_t sd_log_thresh1;
638 atomic_t sd_log_thresh2;
639 atomic_t sd_log_blks_free;
640 wait_queue_head_t sd_log_waitq;
641 wait_queue_head_t sd_logd_waitq;
644 unsigned int sd_log_head;
645 unsigned int sd_log_tail;
648 struct rw_semaphore sd_log_flush_lock;
649 atomic_t sd_log_in_flight;
650 wait_queue_head_t sd_log_flush_wait;
652 unsigned int sd_log_flush_head;
653 u64 sd_log_flush_wrapped;
655 spinlock_t sd_ail_lock;
656 struct list_head sd_ail1_list;
657 struct list_head sd_ail2_list;
661 struct list_head sd_revoke_list;
662 unsigned int sd_replay_tail;
664 unsigned int sd_found_blocks;
665 unsigned int sd_found_revokes;
666 unsigned int sd_replayed_blocks;
668 /* For quiescing the filesystem */
670 struct gfs2_holder sd_freeze_gh;
671 struct mutex sd_freeze_lock;
672 unsigned int sd_freeze_count;
674 char sd_fsname[GFS2_FSNAME_LEN];
675 char sd_table_name[GFS2_FSNAME_LEN];
676 char sd_proto_name[GFS2_FSNAME_LEN];
680 unsigned long sd_last_warning;
681 struct dentry *debugfs_dir; /* debugfs directory */
682 struct dentry *debugfs_dentry_glocks; /* for debugfs */
685 #endif /* __INCORE_DOT_H__ */