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/workqueue.h>
15 #include <linux/slow-work.h>
16 #include <linux/dlm.h>
17 #include <linux/buffer_head.h>
19 #define DIO_WAIT 0x00000010
20 #define DIO_METADATA 0x00000020
21 #define DIO_ALL 0x00000100
23 struct gfs2_log_operations;
24 struct gfs2_log_element;
27 struct gfs2_quota_data;
34 typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
36 struct gfs2_log_header_host {
37 u64 lh_sequence; /* Sequence number of this transaction */
38 u32 lh_flags; /* GFS2_LOG_HEAD_... */
39 u32 lh_tail; /* Block number of log tail */
45 * Structure of operations that are associated with each
46 * type of element in the log.
49 struct gfs2_log_operations {
50 void (*lo_add) (struct gfs2_sbd *sdp, struct gfs2_log_element *le);
51 void (*lo_before_commit) (struct gfs2_sbd *sdp);
52 void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_ail *ai);
53 void (*lo_before_scan) (struct gfs2_jdesc *jd,
54 struct gfs2_log_header_host *head, int pass);
55 int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start,
56 struct gfs2_log_descriptor *ld, __be64 *ptr,
58 void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass);
62 struct gfs2_log_element {
63 struct list_head le_list;
64 const struct gfs2_log_operations *le_ops;
70 struct buffer_head *bi_bh;
72 unsigned long bi_flags;
79 struct list_head rd_list; /* Link with superblock */
80 struct list_head rd_list_mru;
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 */
91 struct gfs2_bitmap *rd_bits;
92 struct mutex rd_mutex;
93 struct gfs2_log_element rd_le;
94 struct gfs2_sbd *rd_sbd;
95 unsigned int rd_bh_count;
98 #define GFS2_RDF_CHECK 0x10000000 /* check for unlinked inodes */
99 #define GFS2_RDF_UPTODATE 0x20000000 /* rg is up to date */
100 #define GFS2_RDF_ERROR 0x40000000 /* error in rg */
101 #define GFS2_RDF_MASK 0xf0000000 /* mask for internal flags */
104 enum gfs2_state_bits {
105 BH_Pinned = BH_PrivateStart,
106 BH_Escaped = BH_PrivateStart + 1,
109 BUFFER_FNS(Pinned, pinned)
110 TAS_BUFFER_FNS(Pinned, pinned)
111 BUFFER_FNS(Escaped, escaped)
112 TAS_BUFFER_FNS(Escaped, escaped)
114 struct gfs2_bufdata {
115 struct buffer_head *bd_bh;
116 struct gfs2_glock *bd_gl;
119 struct list_head list_tr;
122 #define bd_list_tr u.list_tr
123 #define bd_blkno u.blkno
125 struct gfs2_log_element bd_le;
127 struct gfs2_ail *bd_ail;
128 struct list_head bd_ail_st_list;
129 struct list_head bd_ail_gl_list;
133 * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
134 * prefix of lock_dlm_ gets awkward.
137 #define GDLM_STRNAME_BYTES 25
138 #define GDLM_LVB_SIZE 32
146 unsigned int ln_type;
149 #define lm_name_equal(name1, name2) \
150 (((name1)->ln_number == (name2)->ln_number) && \
151 ((name1)->ln_type == (name2)->ln_type))
154 struct gfs2_glock_operations {
155 void (*go_xmote_th) (struct gfs2_glock *gl);
156 int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);
157 void (*go_inval) (struct gfs2_glock *gl, int flags);
158 int (*go_demote_ok) (const struct gfs2_glock *gl);
159 int (*go_lock) (struct gfs2_holder *gh);
160 void (*go_unlock) (struct gfs2_holder *gh);
161 int (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl);
163 const unsigned long go_min_hold_time;
168 HIF_HOLDER = 6, /* Set for gh that "holds" the glock */
174 struct list_head gh_list;
176 struct gfs2_glock *gh_gl;
177 struct pid *gh_owner_pid;
178 unsigned int gh_state;
182 unsigned long gh_iflags; /* HIF_... */
189 GLF_PENDING_DEMOTE = 4,
190 GLF_DEMOTE_IN_PROGRESS = 5,
193 GLF_INVALIDATE_IN_PROGRESS = 8,
194 GLF_REPLY_PENDING = 9,
200 struct hlist_node gl_list;
201 unsigned long gl_flags; /* GLF_... */
202 struct lm_lockname gl_name;
207 unsigned int gl_state;
208 unsigned int gl_target;
209 unsigned int gl_reply;
210 unsigned int gl_hash;
212 unsigned int gl_demote_state; /* state requested by remote node */
213 unsigned long gl_demote_time; /* time of first demote request */
214 struct list_head gl_holders;
216 const struct gfs2_glock_operations *gl_ops;
217 char gl_strname[GDLM_STRNAME_BYTES];
218 struct dlm_lksb gl_lksb;
220 unsigned long gl_tchange;
223 struct list_head gl_lru;
225 struct gfs2_sbd *gl_sbd;
227 struct inode *gl_aspace;
228 struct list_head gl_ail_list;
229 atomic_t gl_ail_count;
230 struct delayed_work gl_work;
233 #define GFS2_MIN_LVB_SIZE 32 /* Min size of LVB that gfs2 supports */
238 struct gfs2_quota_data *al_qd[2*MAXQUOTAS];
239 struct gfs2_holder al_qd_ghs[2*MAXQUOTAS];
240 unsigned int al_qd_num;
242 u32 al_requested; /* Filled in by caller of gfs2_inplace_reserve() */
243 u32 al_alloced; /* Filled in by gfs2_alloc_*() */
245 /* Filled in by gfs2_inplace_reserve() */
247 unsigned int al_line;
249 struct gfs2_holder al_ri_gh;
250 struct gfs2_holder al_rgd_gh;
251 struct gfs2_rgrpd *al_rgd;
259 GIF_USER = 4, /* user inode, not metadata addr space */
264 struct inode i_inode;
270 unsigned long i_flags; /* GIF_... */
271 struct gfs2_glock *i_gl; /* Move into i_gh? */
272 struct gfs2_holder i_iopen_gh;
273 struct gfs2_holder i_gh; /* for prepare/commit_write only */
274 struct gfs2_alloc *i_alloc;
275 u64 i_goal; /* goal block for allocations */
276 struct rw_semaphore i_rw_mutex;
277 struct list_head i_trunc_list;
285 * Since i_inode is the first element of struct gfs2_inode,
286 * this is effectively a cast.
288 static inline struct gfs2_inode *GFS2_I(struct inode *inode)
290 return container_of(inode, struct gfs2_inode, i_inode);
293 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
295 return inode->i_sb->s_fs_info;
299 struct mutex f_fl_mutex;
300 struct gfs2_holder f_fl_gh;
303 struct gfs2_revoke_replay {
304 struct list_head rr_list;
306 unsigned int rr_where;
315 struct gfs2_quota_data {
316 struct list_head qd_list;
317 struct list_head qd_reclaim;
322 unsigned long qd_flags; /* QDF_... */
327 unsigned int qd_slot;
328 unsigned int qd_slot_count;
330 struct buffer_head *qd_bh;
331 struct gfs2_quota_change *qd_bh_qc;
332 unsigned int qd_bh_count;
334 struct gfs2_glock *qd_gl;
335 struct gfs2_quota_lvb qd_qb;
338 unsigned long qd_last_warn;
344 unsigned int tr_blocks;
345 unsigned int tr_revokes;
346 unsigned int tr_reserved;
348 struct gfs2_holder tr_t_gh;
352 unsigned int tr_num_buf;
353 unsigned int tr_num_buf_new;
354 unsigned int tr_num_databuf_new;
355 unsigned int tr_num_buf_rm;
356 unsigned int tr_num_databuf_rm;
357 struct list_head tr_list_buf;
359 unsigned int tr_num_revoke;
360 unsigned int tr_num_revoke_rm;
364 struct list_head ai_list;
366 unsigned int ai_first;
367 struct list_head ai_ail1_list;
368 struct list_head ai_ail2_list;
373 struct gfs2_journal_extent {
374 struct list_head extent_list;
376 unsigned int lblock; /* First logical block */
377 u64 dblock; /* First disk block */
382 struct list_head jd_list;
383 struct list_head extent_list;
384 struct slow_work jd_work;
385 struct inode *jd_inode;
386 unsigned long jd_flags;
387 #define JDF_RECOVERY 1
389 unsigned int jd_blocks;
392 struct gfs2_statfs_change_host {
398 #define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF
399 #define GFS2_QUOTA_OFF 0
400 #define GFS2_QUOTA_ACCOUNT 1
401 #define GFS2_QUOTA_ON 2
403 #define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED
404 #define GFS2_DATA_WRITEBACK 1
405 #define GFS2_DATA_ORDERED 2
408 char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
409 char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
410 char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
411 unsigned int ar_spectator:1; /* Don't get a journal */
412 unsigned int ar_ignore_local_fs:1; /* Ignore optimisations */
413 unsigned int ar_localflocks:1; /* Let the VFS do flock|fcntl */
414 unsigned int ar_localcaching:1; /* Local caching */
415 unsigned int ar_debug:1; /* Oops on errors */
416 unsigned int ar_upgrade:1; /* Upgrade ondisk format */
417 unsigned int ar_posix_acl:1; /* Enable posix acls */
418 unsigned int ar_quota:2; /* off/account/on */
419 unsigned int ar_suiddir:1; /* suiddir support */
420 unsigned int ar_data:2; /* ordered/writeback */
421 unsigned int ar_meta:1; /* mount metafs */
422 unsigned int ar_discard:1; /* discard requests */
423 int ar_commit; /* Commit interval */
429 unsigned int gt_incore_log_blocks;
430 unsigned int gt_log_flush_secs;
432 unsigned int gt_logd_secs;
434 unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
435 unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
436 unsigned int gt_quota_scale_num; /* Numerator */
437 unsigned int gt_quota_scale_den; /* Denominator */
438 unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
439 unsigned int gt_new_files_jdata;
440 unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
441 unsigned int gt_stall_secs; /* Detects trouble! */
442 unsigned int gt_complain_secs;
443 unsigned int gt_statfs_quantum;
444 unsigned int gt_statfs_slow;
448 SDF_JOURNAL_CHECKED = 0,
449 SDF_JOURNAL_LIVE = 1,
455 #define GFS2_FSNAME_LEN 256
457 struct gfs2_inum_host {
462 struct gfs2_sb_host {
468 u32 sb_multihost_format;
472 struct gfs2_inum_host sb_master_dir;
473 struct gfs2_inum_host sb_root_dir;
475 char sb_lockproto[GFS2_LOCKNAME_LEN];
476 char sb_locktable[GFS2_LOCKNAME_LEN];
481 * lm_mount() return values
483 * ls_jid - the journal ID this node should use
484 * ls_first - this node is the first to mount the file system
485 * ls_lockspace - lock module's context for this file system
486 * ls_ops - lock module's functions
489 struct lm_lockstruct {
492 unsigned int ls_first;
493 unsigned int ls_first_done;
494 unsigned int ls_nodir;
495 const struct lm_lockops *ls_ops;
496 unsigned long ls_flags;
497 dlm_lockspace_t *ls_dlm;
499 int ls_recover_jid_done;
500 int ls_recover_jid_status;
504 struct super_block *sd_vfs;
505 struct kobject sd_kobj;
506 unsigned long sd_flags; /* SDF_... */
507 struct gfs2_sb_host sd_sb;
509 /* Constants computed on mount */
513 u32 sd_diptrs; /* Number of pointers in a dinode */
514 u32 sd_inptrs; /* Number of pointers in a indirect block */
515 u32 sd_jbsize; /* Size of a journaled data block */
516 u32 sd_hash_bsize; /* sizeof(exhash block) */
517 u32 sd_hash_bsize_shift;
518 u32 sd_hash_ptrs; /* Number of pointers in a hash block */
520 u32 sd_max_dirres; /* Max blocks needed to add a directory entry */
521 u32 sd_max_height; /* Max height of a file's metadata tree */
522 u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
523 u32 sd_max_jheight; /* Max height of journaled file's meta tree */
524 u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1];
526 struct gfs2_args sd_args; /* Mount arguments */
527 struct gfs2_tune sd_tune; /* Filesystem tuning structure */
531 struct lm_lockstruct sd_lockstruct;
532 struct gfs2_holder sd_live_gh;
533 struct gfs2_glock *sd_rename_gl;
534 struct gfs2_glock *sd_trans_gl;
538 struct dentry *sd_master_dir;
539 struct dentry *sd_root_dir;
541 struct inode *sd_jindex;
542 struct inode *sd_inum_inode;
543 struct inode *sd_statfs_inode;
544 struct inode *sd_ir_inode;
545 struct inode *sd_sc_inode;
546 struct inode *sd_qc_inode;
547 struct inode *sd_rindex;
548 struct inode *sd_quota_inode;
552 struct mutex sd_inum_mutex;
556 spinlock_t sd_statfs_spin;
557 struct gfs2_statfs_change_host sd_statfs_master;
558 struct gfs2_statfs_change_host sd_statfs_local;
560 /* Resource group stuff */
562 int sd_rindex_uptodate;
563 spinlock_t sd_rindex_spin;
564 struct mutex sd_rindex_mutex;
565 struct list_head sd_rindex_list;
566 struct list_head sd_rindex_mru_list;
567 struct gfs2_rgrpd *sd_rindex_forward;
568 unsigned int sd_rgrps;
570 /* Journal index stuff */
572 struct list_head sd_jindex_list;
573 spinlock_t sd_jindex_spin;
574 struct mutex sd_jindex_mutex;
575 unsigned int sd_journals;
577 struct gfs2_jdesc *sd_jdesc;
578 struct gfs2_holder sd_journal_gh;
579 struct gfs2_holder sd_jinode_gh;
581 struct gfs2_holder sd_ir_gh;
582 struct gfs2_holder sd_sc_gh;
583 struct gfs2_holder sd_qc_gh;
587 struct task_struct *sd_logd_process;
588 struct task_struct *sd_quotad_process;
592 struct list_head sd_quota_list;
593 atomic_t sd_quota_count;
594 struct mutex sd_quota_mutex;
595 wait_queue_head_t sd_quota_wait;
596 struct list_head sd_trunc_list;
597 spinlock_t sd_trunc_lock;
599 unsigned int sd_quota_slots;
600 unsigned int sd_quota_chunks;
601 unsigned char **sd_quota_bitmap;
603 u64 sd_quota_sync_gen;
607 spinlock_t sd_log_lock;
609 unsigned int sd_log_blks_reserved;
610 unsigned int sd_log_commited_buf;
611 unsigned int sd_log_commited_databuf;
612 unsigned int sd_log_commited_revoke;
614 unsigned int sd_log_num_buf;
615 unsigned int sd_log_num_revoke;
616 unsigned int sd_log_num_rg;
617 unsigned int sd_log_num_databuf;
619 struct list_head sd_log_le_buf;
620 struct list_head sd_log_le_revoke;
621 struct list_head sd_log_le_rg;
622 struct list_head sd_log_le_databuf;
623 struct list_head sd_log_le_ordered;
625 atomic_t sd_log_blks_free;
626 struct mutex sd_log_reserve_mutex;
629 unsigned int sd_log_head;
630 unsigned int sd_log_tail;
633 unsigned long sd_log_flush_time;
634 struct rw_semaphore sd_log_flush_lock;
635 atomic_t sd_log_in_flight;
636 wait_queue_head_t sd_log_flush_wait;
638 unsigned int sd_log_flush_head;
639 u64 sd_log_flush_wrapped;
641 struct list_head sd_ail1_list;
642 struct list_head sd_ail2_list;
647 struct list_head sd_revoke_list;
648 unsigned int sd_replay_tail;
650 unsigned int sd_found_blocks;
651 unsigned int sd_found_revokes;
652 unsigned int sd_replayed_blocks;
654 /* For quiescing the filesystem */
656 struct gfs2_holder sd_freeze_gh;
657 struct mutex sd_freeze_lock;
658 unsigned int sd_freeze_count;
660 char sd_fsname[GFS2_FSNAME_LEN];
661 char sd_table_name[GFS2_FSNAME_LEN];
662 char sd_proto_name[GFS2_FSNAME_LEN];
666 unsigned long sd_last_warning;
667 struct dentry *debugfs_dir; /* debugfs directory */
668 struct dentry *debugfs_dentry_glocks; /* for debugfs */
671 #endif /* __INCORE_DOT_H__ */