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>
21 #include <linux/rbtree.h>
23 #define DIO_WAIT 0x00000010
24 #define DIO_METADATA 0x00000020
26 struct gfs2_log_operations
;
27 struct gfs2_log_element
;
30 struct gfs2_quota_data
;
37 typedef void (*gfs2_glop_bh_t
) (struct gfs2_glock
*gl
, unsigned int ret
);
39 struct gfs2_log_header_host
{
40 u64 lh_sequence
; /* Sequence number of this transaction */
41 u32 lh_flags
; /* GFS2_LOG_HEAD_... */
42 u32 lh_tail
; /* Block number of log tail */
48 * Structure of operations that are associated with each
49 * type of element in the log.
52 struct gfs2_log_operations
{
53 void (*lo_add
) (struct gfs2_sbd
*sdp
, struct gfs2_log_element
*le
);
54 void (*lo_before_commit
) (struct gfs2_sbd
*sdp
);
55 void (*lo_after_commit
) (struct gfs2_sbd
*sdp
, struct gfs2_ail
*ai
);
56 void (*lo_before_scan
) (struct gfs2_jdesc
*jd
,
57 struct gfs2_log_header_host
*head
, int pass
);
58 int (*lo_scan_elements
) (struct gfs2_jdesc
*jd
, unsigned int start
,
59 struct gfs2_log_descriptor
*ld
, __be64
*ptr
,
61 void (*lo_after_scan
) (struct gfs2_jdesc
*jd
, int error
, int pass
);
65 struct gfs2_log_element
{
66 struct list_head le_list
;
67 const struct gfs2_log_operations
*le_ops
;
73 struct buffer_head
*bi_bh
;
75 unsigned long bi_flags
;
82 struct rb_node rd_node
; /* Link with superblock */
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 gfs2_sbd
*rd_sbd
;
97 #define GFS2_RDF_CHECK 0x10000000 /* check for unlinked inodes */
98 #define GFS2_RDF_UPTODATE 0x20000000 /* rg is up to date */
99 #define GFS2_RDF_ERROR 0x40000000 /* error in rg */
100 #define GFS2_RDF_MASK 0xf0000000 /* mask for internal flags */
103 enum gfs2_state_bits
{
104 BH_Pinned
= BH_PrivateStart
,
105 BH_Escaped
= BH_PrivateStart
+ 1,
108 BUFFER_FNS(Pinned
, pinned
)
109 TAS_BUFFER_FNS(Pinned
, pinned
)
110 BUFFER_FNS(Escaped
, escaped
)
111 TAS_BUFFER_FNS(Escaped
, escaped
)
113 struct gfs2_bufdata
{
114 struct buffer_head
*bd_bh
;
115 struct gfs2_glock
*bd_gl
;
118 struct list_head list_tr
;
121 #define bd_list_tr u.list_tr
122 #define bd_blkno u.blkno
124 struct gfs2_log_element bd_le
;
126 struct gfs2_ail
*bd_ail
;
127 struct list_head bd_ail_st_list
;
128 struct list_head bd_ail_gl_list
;
132 * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
133 * prefix of lock_dlm_ gets awkward.
136 #define GDLM_STRNAME_BYTES 25
137 #define GDLM_LVB_SIZE 32
145 unsigned int ln_type
;
148 #define lm_name_equal(name1, name2) \
149 (((name1)->ln_number == (name2)->ln_number) && \
150 ((name1)->ln_type == (name2)->ln_type))
153 struct gfs2_glock_operations
{
154 void (*go_xmote_th
) (struct gfs2_glock
*gl
);
155 int (*go_xmote_bh
) (struct gfs2_glock
*gl
, struct gfs2_holder
*gh
);
156 void (*go_inval
) (struct gfs2_glock
*gl
, int flags
);
157 int (*go_demote_ok
) (const struct gfs2_glock
*gl
);
158 int (*go_lock
) (struct gfs2_holder
*gh
);
159 void (*go_unlock
) (struct gfs2_holder
*gh
);
160 int (*go_dump
)(struct seq_file
*seq
, const struct gfs2_glock
*gl
);
161 void (*go_callback
) (struct gfs2_glock
*gl
);
163 const unsigned long go_flags
;
164 #define GLOF_ASPACE 1
169 HIF_HOLDER
= 6, /* Set for gh that "holds" the glock */
175 struct list_head gh_list
;
177 struct gfs2_glock
*gh_gl
;
178 struct pid
*gh_owner_pid
;
179 unsigned int gh_state
;
183 unsigned long gh_iflags
; /* HIF_... */
190 GLF_PENDING_DEMOTE
= 4,
191 GLF_DEMOTE_IN_PROGRESS
= 5,
194 GLF_INVALIDATE_IN_PROGRESS
= 8,
195 GLF_REPLY_PENDING
= 9,
200 GLF_OBJECT
= 14, /* Used only for tracing */
204 struct hlist_bl_node gl_list
;
205 unsigned long gl_flags
; /* GLF_... */
206 struct lm_lockname gl_name
;
211 /* State fields protected by gl_spin */
212 unsigned int gl_state
:2, /* Current state */
213 gl_target
:2, /* Target state */
214 gl_demote_state
:2, /* State requested by remote node */
215 gl_req
:2, /* State in last dlm request */
216 gl_reply
:8; /* Last reply from the dlm */
218 unsigned int gl_hash
;
219 unsigned long gl_demote_time
; /* time of first demote request */
221 struct list_head gl_holders
;
223 const struct gfs2_glock_operations
*gl_ops
;
224 char gl_strname
[GDLM_STRNAME_BYTES
];
225 struct dlm_lksb gl_lksb
;
227 unsigned long gl_tchange
;
230 struct list_head gl_lru
;
232 struct gfs2_sbd
*gl_sbd
;
234 struct list_head gl_ail_list
;
235 atomic_t gl_ail_count
;
237 struct delayed_work gl_work
;
238 struct work_struct gl_delete
;
239 struct rcu_head gl_rcu
;
242 #define GFS2_MIN_LVB_SIZE 32 /* Min size of LVB that gfs2 supports */
247 struct gfs2_quota_data
*al_qd
[2*MAXQUOTAS
];
248 struct gfs2_holder al_qd_ghs
[2*MAXQUOTAS
];
249 unsigned int al_qd_num
;
251 u32 al_requested
; /* Filled in by caller of gfs2_inplace_reserve() */
252 u32 al_alloced
; /* Filled in by gfs2_alloc_*() */
254 /* Filled in by gfs2_inplace_reserve() */
256 unsigned int al_line
;
258 struct gfs2_holder al_rgd_gh
;
264 GIF_ALLOC_FAILED
= 2,
270 struct inode i_inode
;
275 unsigned long i_flags
; /* GIF_... */
276 struct gfs2_glock
*i_gl
; /* Move into i_gh? */
277 struct gfs2_holder i_iopen_gh
;
278 struct gfs2_holder i_gh
; /* for prepare/commit_write only */
279 struct gfs2_alloc
*i_alloc
;
280 struct gfs2_rgrpd
*i_rgd
;
281 u64 i_goal
; /* goal block for allocations */
282 struct rw_semaphore i_rw_mutex
;
283 struct list_head i_trunc_list
;
284 __be64
*i_hash_cache
;
292 * Since i_inode is the first element of struct gfs2_inode,
293 * this is effectively a cast.
295 static inline struct gfs2_inode
*GFS2_I(struct inode
*inode
)
297 return container_of(inode
, struct gfs2_inode
, i_inode
);
300 static inline struct gfs2_sbd
*GFS2_SB(const struct inode
*inode
)
302 return inode
->i_sb
->s_fs_info
;
306 struct mutex f_fl_mutex
;
307 struct gfs2_holder f_fl_gh
;
310 struct gfs2_revoke_replay
{
311 struct list_head rr_list
;
313 unsigned int rr_where
;
323 struct gfs2_quota_data
{
324 struct list_head qd_list
;
325 struct list_head qd_reclaim
;
330 unsigned long qd_flags
; /* QDF_... */
335 unsigned int qd_slot
;
336 unsigned int qd_slot_count
;
338 struct buffer_head
*qd_bh
;
339 struct gfs2_quota_change
*qd_bh_qc
;
340 unsigned int qd_bh_count
;
342 struct gfs2_glock
*qd_gl
;
343 struct gfs2_quota_lvb qd_qb
;
346 unsigned long qd_last_warn
;
352 unsigned int tr_blocks
;
353 unsigned int tr_revokes
;
354 unsigned int tr_reserved
;
356 struct gfs2_holder tr_t_gh
;
360 unsigned int tr_num_buf
;
361 unsigned int tr_num_buf_new
;
362 unsigned int tr_num_databuf_new
;
363 unsigned int tr_num_buf_rm
;
364 unsigned int tr_num_databuf_rm
;
365 struct list_head tr_list_buf
;
367 unsigned int tr_num_revoke
;
368 unsigned int tr_num_revoke_rm
;
372 struct list_head ai_list
;
374 unsigned int ai_first
;
375 struct list_head ai_ail1_list
;
376 struct list_head ai_ail2_list
;
379 struct gfs2_journal_extent
{
380 struct list_head extent_list
;
382 unsigned int lblock
; /* First logical block */
383 u64 dblock
; /* First disk block */
388 struct list_head jd_list
;
389 struct list_head extent_list
;
390 struct work_struct jd_work
;
391 struct inode
*jd_inode
;
392 unsigned long jd_flags
;
393 #define JDF_RECOVERY 1
395 unsigned int jd_blocks
;
398 struct gfs2_statfs_change_host
{
404 #define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF
405 #define GFS2_QUOTA_OFF 0
406 #define GFS2_QUOTA_ACCOUNT 1
407 #define GFS2_QUOTA_ON 2
409 #define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED
410 #define GFS2_DATA_WRITEBACK 1
411 #define GFS2_DATA_ORDERED 2
413 #define GFS2_ERRORS_DEFAULT GFS2_ERRORS_WITHDRAW
414 #define GFS2_ERRORS_WITHDRAW 0
415 #define GFS2_ERRORS_CONTINUE 1 /* place holder for future feature */
416 #define GFS2_ERRORS_RO 2 /* place holder for future feature */
417 #define GFS2_ERRORS_PANIC 3
420 char ar_lockproto
[GFS2_LOCKNAME_LEN
]; /* Name of the Lock Protocol */
421 char ar_locktable
[GFS2_LOCKNAME_LEN
]; /* Name of the Lock Table */
422 char ar_hostdata
[GFS2_LOCKNAME_LEN
]; /* Host specific data */
423 unsigned int ar_spectator
:1; /* Don't get a journal */
424 unsigned int ar_localflocks
:1; /* Let the VFS do flock|fcntl */
425 unsigned int ar_debug
:1; /* Oops on errors */
426 unsigned int ar_posix_acl
:1; /* Enable posix acls */
427 unsigned int ar_quota
:2; /* off/account/on */
428 unsigned int ar_suiddir
:1; /* suiddir support */
429 unsigned int ar_data
:2; /* ordered/writeback */
430 unsigned int ar_meta
:1; /* mount metafs */
431 unsigned int ar_discard
:1; /* discard requests */
432 unsigned int ar_errors
:2; /* errors=withdraw | panic */
433 unsigned int ar_nobarrier
:1; /* do not send barriers */
434 int ar_commit
; /* Commit interval */
435 int ar_statfs_quantum
; /* The fast statfs interval */
436 int ar_quota_quantum
; /* The quota interval */
437 int ar_statfs_percent
; /* The % change to force sync */
443 unsigned int gt_logd_secs
;
445 unsigned int gt_quota_simul_sync
; /* Max quotavals to sync at once */
446 unsigned int gt_quota_warn_period
; /* Secs between quota warn msgs */
447 unsigned int gt_quota_scale_num
; /* Numerator */
448 unsigned int gt_quota_scale_den
; /* Denominator */
449 unsigned int gt_quota_quantum
; /* Secs between syncs to quota file */
450 unsigned int gt_new_files_jdata
;
451 unsigned int gt_max_readahead
; /* Max bytes to read-ahead from disk */
452 unsigned int gt_complain_secs
;
453 unsigned int gt_statfs_quantum
;
454 unsigned int gt_statfs_slow
;
458 SDF_JOURNAL_CHECKED
= 0,
459 SDF_JOURNAL_LIVE
= 1,
467 #define GFS2_FSNAME_LEN 256
469 struct gfs2_inum_host
{
474 struct gfs2_sb_host
{
480 u32 sb_multihost_format
;
484 struct gfs2_inum_host sb_master_dir
;
485 struct gfs2_inum_host sb_root_dir
;
487 char sb_lockproto
[GFS2_LOCKNAME_LEN
];
488 char sb_locktable
[GFS2_LOCKNAME_LEN
];
492 * lm_mount() return values
494 * ls_jid - the journal ID this node should use
495 * ls_first - this node is the first to mount the file system
496 * ls_lockspace - lock module's context for this file system
497 * ls_ops - lock module's functions
500 struct lm_lockstruct
{
502 unsigned int ls_first
;
503 unsigned int ls_first_done
;
504 unsigned int ls_nodir
;
505 const struct lm_lockops
*ls_ops
;
506 unsigned long ls_flags
;
507 dlm_lockspace_t
*ls_dlm
;
509 int ls_recover_jid_done
;
510 int ls_recover_jid_status
;
514 struct super_block
*sd_vfs
;
515 struct kobject sd_kobj
;
516 unsigned long sd_flags
; /* SDF_... */
517 struct gfs2_sb_host sd_sb
;
519 /* Constants computed on mount */
523 u32 sd_diptrs
; /* Number of pointers in a dinode */
524 u32 sd_inptrs
; /* Number of pointers in a indirect block */
525 u32 sd_jbsize
; /* Size of a journaled data block */
526 u32 sd_hash_bsize
; /* sizeof(exhash block) */
527 u32 sd_hash_bsize_shift
;
528 u32 sd_hash_ptrs
; /* Number of pointers in a hash block */
530 u32 sd_max_dirres
; /* Max blocks needed to add a directory entry */
531 u32 sd_max_height
; /* Max height of a file's metadata tree */
532 u64 sd_heightsize
[GFS2_MAX_META_HEIGHT
+ 1];
533 u32 sd_max_jheight
; /* Max height of journaled file's meta tree */
534 u64 sd_jheightsize
[GFS2_MAX_META_HEIGHT
+ 1];
536 struct gfs2_args sd_args
; /* Mount arguments */
537 struct gfs2_tune sd_tune
; /* Filesystem tuning structure */
541 struct lm_lockstruct sd_lockstruct
;
542 struct gfs2_holder sd_live_gh
;
543 struct gfs2_glock
*sd_rename_gl
;
544 struct gfs2_glock
*sd_trans_gl
;
545 wait_queue_head_t sd_glock_wait
;
546 atomic_t sd_glock_disposal
;
547 struct completion sd_locking_init
;
551 struct dentry
*sd_master_dir
;
552 struct dentry
*sd_root_dir
;
554 struct inode
*sd_jindex
;
555 struct inode
*sd_statfs_inode
;
556 struct inode
*sd_sc_inode
;
557 struct inode
*sd_qc_inode
;
558 struct inode
*sd_rindex
;
559 struct inode
*sd_quota_inode
;
563 spinlock_t sd_statfs_spin
;
564 struct gfs2_statfs_change_host sd_statfs_master
;
565 struct gfs2_statfs_change_host sd_statfs_local
;
566 int sd_statfs_force_sync
;
568 /* Resource group stuff */
570 int sd_rindex_uptodate
;
571 spinlock_t sd_rindex_spin
;
572 struct mutex sd_rindex_mutex
;
573 struct rb_root sd_rindex_tree
;
574 unsigned int sd_rgrps
;
575 unsigned int sd_max_rg_data
;
577 /* Journal index stuff */
579 struct list_head sd_jindex_list
;
580 spinlock_t sd_jindex_spin
;
581 struct mutex sd_jindex_mutex
;
582 unsigned int sd_journals
;
584 struct gfs2_jdesc
*sd_jdesc
;
585 struct gfs2_holder sd_journal_gh
;
586 struct gfs2_holder sd_jinode_gh
;
588 struct gfs2_holder sd_sc_gh
;
589 struct gfs2_holder sd_qc_gh
;
593 struct task_struct
*sd_logd_process
;
594 struct task_struct
*sd_quotad_process
;
598 struct list_head sd_quota_list
;
599 atomic_t sd_quota_count
;
600 struct mutex sd_quota_mutex
;
601 wait_queue_head_t sd_quota_wait
;
602 struct list_head sd_trunc_list
;
603 spinlock_t sd_trunc_lock
;
605 unsigned int sd_quota_slots
;
606 unsigned int sd_quota_chunks
;
607 unsigned char **sd_quota_bitmap
;
609 u64 sd_quota_sync_gen
;
613 spinlock_t sd_log_lock
;
615 unsigned int sd_log_blks_reserved
;
616 unsigned int sd_log_commited_buf
;
617 unsigned int sd_log_commited_databuf
;
618 int sd_log_commited_revoke
;
620 atomic_t sd_log_pinned
;
621 unsigned int sd_log_num_buf
;
622 unsigned int sd_log_num_revoke
;
623 unsigned int sd_log_num_rg
;
624 unsigned int sd_log_num_databuf
;
626 struct list_head sd_log_le_buf
;
627 struct list_head sd_log_le_revoke
;
628 struct list_head sd_log_le_rg
;
629 struct list_head sd_log_le_databuf
;
630 struct list_head sd_log_le_ordered
;
632 atomic_t sd_log_thresh1
;
633 atomic_t sd_log_thresh2
;
634 atomic_t sd_log_blks_free
;
635 wait_queue_head_t sd_log_waitq
;
636 wait_queue_head_t sd_logd_waitq
;
639 unsigned int sd_log_head
;
640 unsigned int sd_log_tail
;
643 struct rw_semaphore sd_log_flush_lock
;
644 atomic_t sd_log_in_flight
;
645 wait_queue_head_t sd_log_flush_wait
;
647 unsigned int sd_log_flush_head
;
648 u64 sd_log_flush_wrapped
;
650 spinlock_t sd_ail_lock
;
651 struct list_head sd_ail1_list
;
652 struct list_head sd_ail2_list
;
656 struct list_head sd_revoke_list
;
657 unsigned int sd_replay_tail
;
659 unsigned int sd_found_blocks
;
660 unsigned int sd_found_revokes
;
661 unsigned int sd_replayed_blocks
;
663 /* For quiescing the filesystem */
665 struct gfs2_holder sd_freeze_gh
;
666 struct mutex sd_freeze_lock
;
667 unsigned int sd_freeze_count
;
669 char sd_fsname
[GFS2_FSNAME_LEN
];
670 char sd_table_name
[GFS2_FSNAME_LEN
];
671 char sd_proto_name
[GFS2_FSNAME_LEN
];
675 unsigned long sd_last_warning
;
676 struct dentry
*debugfs_dir
; /* debugfs directory */
677 struct dentry
*debugfs_dentry_glocks
; /* for debugfs */
680 #endif /* __INCORE_DOT_H__ */