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/dlm.h>
16 #include <linux/buffer_head.h>
18 #define DIO_WAIT 0x00000010
19 #define DIO_METADATA 0x00000020
20 #define DIO_ALL 0x00000100
22 struct gfs2_log_operations;
23 struct gfs2_log_element;
26 struct gfs2_quota_data;
33 typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
35 struct gfs2_log_header_host {
36 u64 lh_sequence; /* Sequence number of this transaction */
37 u32 lh_flags; /* GFS2_LOG_HEAD_... */
38 u32 lh_tail; /* Block number of log tail */
44 * Structure of operations that are associated with each
45 * type of element in the log.
48 struct gfs2_log_operations {
49 void (*lo_add) (struct gfs2_sbd *sdp, struct gfs2_log_element *le);
50 void (*lo_before_commit) (struct gfs2_sbd *sdp);
51 void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_ail *ai);
52 void (*lo_before_scan) (struct gfs2_jdesc *jd,
53 struct gfs2_log_header_host *head, int pass);
54 int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start,
55 struct gfs2_log_descriptor *ld, __be64 *ptr,
57 void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass);
61 struct gfs2_log_element {
62 struct list_head le_list;
63 const struct gfs2_log_operations *le_ops;
67 struct buffer_head *bi_bh;
75 struct list_head rd_list; /* Link with superblock */
76 struct list_head rd_list_mru;
77 struct gfs2_glock *rd_gl; /* Glock for this rgrp */
78 u64 rd_addr; /* grp block disk address */
79 u64 rd_data0; /* first data location */
80 u32 rd_length; /* length of rgrp header in fs blocks */
81 u32 rd_data; /* num of data blocks in rgrp */
82 u32 rd_bitbytes; /* number of bytes in data bitmaps */
87 struct gfs2_bitmap *rd_bits;
88 struct mutex rd_mutex;
89 struct gfs2_log_element rd_le;
90 struct gfs2_sbd *rd_sbd;
91 unsigned int rd_bh_count;
93 unsigned char rd_flags;
94 #define GFS2_RDF_CHECK 0x01 /* Need to check for unlinked inodes */
95 #define GFS2_RDF_NOALLOC 0x02 /* rg prohibits allocation */
96 #define GFS2_RDF_UPTODATE 0x04 /* rg is up to date */
99 enum gfs2_state_bits {
100 BH_Pinned = BH_PrivateStart,
101 BH_Escaped = BH_PrivateStart + 1,
104 BUFFER_FNS(Pinned, pinned)
105 TAS_BUFFER_FNS(Pinned, pinned)
106 BUFFER_FNS(Escaped, escaped)
107 TAS_BUFFER_FNS(Escaped, escaped)
109 struct gfs2_bufdata {
110 struct buffer_head *bd_bh;
111 struct gfs2_glock *bd_gl;
114 struct list_head list_tr;
117 #define bd_list_tr u.list_tr
118 #define bd_blkno u.blkno
120 struct gfs2_log_element bd_le;
122 struct gfs2_ail *bd_ail;
123 struct list_head bd_ail_st_list;
124 struct list_head bd_ail_gl_list;
128 * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
129 * prefix of lock_dlm_ gets awkward.
132 #define GDLM_STRNAME_BYTES 25
133 #define GDLM_LVB_SIZE 32
141 unsigned int ln_type;
144 #define lm_name_equal(name1, name2) \
145 (((name1)->ln_number == (name2)->ln_number) && \
146 ((name1)->ln_type == (name2)->ln_type))
149 struct gfs2_glock_operations {
150 void (*go_xmote_th) (struct gfs2_glock *gl);
151 int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);
152 void (*go_inval) (struct gfs2_glock *gl, int flags);
153 int (*go_demote_ok) (const struct gfs2_glock *gl);
154 int (*go_lock) (struct gfs2_holder *gh);
155 void (*go_unlock) (struct gfs2_holder *gh);
156 int (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl);
158 const unsigned long go_min_hold_time;
163 HIF_HOLDER = 6, /* Set for gh that "holds" the glock */
169 struct list_head gh_list;
171 struct gfs2_glock *gh_gl;
172 struct pid *gh_owner_pid;
173 unsigned int gh_state;
177 unsigned long gh_iflags; /* HIF_... */
184 GLF_PENDING_DEMOTE = 4,
185 GLF_DEMOTE_IN_PROGRESS = 5,
188 GLF_INVALIDATE_IN_PROGRESS = 8,
189 GLF_REPLY_PENDING = 9,
195 struct hlist_node gl_list;
196 unsigned long gl_flags; /* GLF_... */
197 struct lm_lockname gl_name;
202 unsigned int gl_state;
203 unsigned int gl_target;
204 unsigned int gl_reply;
205 unsigned int gl_hash;
207 unsigned int gl_demote_state; /* state requested by remote node */
208 unsigned long gl_demote_time; /* time of first demote request */
209 struct list_head gl_holders;
211 const struct gfs2_glock_operations *gl_ops;
212 char gl_strname[GDLM_STRNAME_BYTES];
213 struct dlm_lksb gl_lksb;
215 unsigned long gl_tchange;
218 struct list_head gl_lru;
220 struct gfs2_sbd *gl_sbd;
222 struct inode *gl_aspace;
223 struct list_head gl_ail_list;
224 atomic_t gl_ail_count;
225 struct delayed_work gl_work;
228 #define GFS2_MIN_LVB_SIZE 32 /* Min size of LVB that gfs2 supports */
233 struct gfs2_quota_data *al_qd[2*MAXQUOTAS];
234 struct gfs2_holder al_qd_ghs[2*MAXQUOTAS];
235 unsigned int al_qd_num;
237 u32 al_requested; /* Filled in by caller of gfs2_inplace_reserve() */
238 u32 al_alloced; /* Filled in by gfs2_alloc_*() */
240 /* Filled in by gfs2_inplace_reserve() */
242 unsigned int al_line;
244 struct gfs2_holder al_ri_gh;
245 struct gfs2_holder al_rgd_gh;
246 struct gfs2_rgrpd *al_rgd;
254 GIF_USER = 4, /* user inode, not metadata addr space */
259 struct inode i_inode;
265 unsigned long i_flags; /* GIF_... */
266 struct gfs2_glock *i_gl; /* Move into i_gh? */
267 struct gfs2_holder i_iopen_gh;
268 struct gfs2_holder i_gh; /* for prepare/commit_write only */
269 struct gfs2_alloc *i_alloc;
270 u64 i_goal; /* goal block for allocations */
271 struct rw_semaphore i_rw_mutex;
272 struct list_head i_trunc_list;
280 * Since i_inode is the first element of struct gfs2_inode,
281 * this is effectively a cast.
283 static inline struct gfs2_inode *GFS2_I(struct inode *inode)
285 return container_of(inode, struct gfs2_inode, i_inode);
288 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
290 return inode->i_sb->s_fs_info;
294 struct mutex f_fl_mutex;
295 struct gfs2_holder f_fl_gh;
298 struct gfs2_revoke_replay {
299 struct list_head rr_list;
301 unsigned int rr_where;
310 struct gfs2_quota_data {
311 struct list_head qd_list;
312 struct list_head qd_reclaim;
317 unsigned long qd_flags; /* QDF_... */
322 unsigned int qd_slot;
323 unsigned int qd_slot_count;
325 struct buffer_head *qd_bh;
326 struct gfs2_quota_change *qd_bh_qc;
327 unsigned int qd_bh_count;
329 struct gfs2_glock *qd_gl;
330 struct gfs2_quota_lvb qd_qb;
333 unsigned long qd_last_warn;
339 unsigned int tr_blocks;
340 unsigned int tr_revokes;
341 unsigned int tr_reserved;
343 struct gfs2_holder tr_t_gh;
347 unsigned int tr_num_buf;
348 unsigned int tr_num_buf_new;
349 unsigned int tr_num_databuf_new;
350 unsigned int tr_num_buf_rm;
351 unsigned int tr_num_databuf_rm;
352 struct list_head tr_list_buf;
354 unsigned int tr_num_revoke;
355 unsigned int tr_num_revoke_rm;
359 struct list_head ai_list;
361 unsigned int ai_first;
362 struct list_head ai_ail1_list;
363 struct list_head ai_ail2_list;
368 struct gfs2_journal_extent {
369 struct list_head extent_list;
371 unsigned int lblock; /* First logical block */
372 u64 dblock; /* First disk block */
377 struct list_head jd_list;
378 struct list_head extent_list;
380 struct inode *jd_inode;
384 unsigned int jd_blocks;
387 struct gfs2_statfs_change_host {
393 #define GFS2_GLOCKD_DEFAULT 1
394 #define GFS2_GLOCKD_MAX 16
396 #define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF
397 #define GFS2_QUOTA_OFF 0
398 #define GFS2_QUOTA_ACCOUNT 1
399 #define GFS2_QUOTA_ON 2
401 #define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED
402 #define GFS2_DATA_WRITEBACK 1
403 #define GFS2_DATA_ORDERED 2
406 char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
407 char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
408 char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
409 unsigned int ar_spectator:1; /* Don't get a journal */
410 unsigned int ar_ignore_local_fs:1; /* Ignore optimisations */
411 unsigned int ar_localflocks:1; /* Let the VFS do flock|fcntl */
412 unsigned int ar_localcaching:1; /* Local caching */
413 unsigned int ar_debug:1; /* Oops on errors */
414 unsigned int ar_upgrade:1; /* Upgrade ondisk format */
415 unsigned int ar_posix_acl:1; /* Enable posix acls */
416 unsigned int ar_quota:2; /* off/account/on */
417 unsigned int ar_suiddir:1; /* suiddir support */
418 unsigned int ar_data:2; /* ordered/writeback */
419 unsigned int ar_meta:1; /* mount metafs */
420 unsigned int ar_discard:1; /* discard requests */
426 unsigned int gt_incore_log_blocks;
427 unsigned int gt_log_flush_secs;
429 unsigned int gt_recoverd_secs;
430 unsigned int gt_logd_secs;
432 unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
433 unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
434 unsigned int gt_quota_scale_num; /* Numerator */
435 unsigned int gt_quota_scale_den; /* Denominator */
436 unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
437 unsigned int gt_new_files_jdata;
438 unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
439 unsigned int gt_stall_secs; /* Detects trouble! */
440 unsigned int gt_complain_secs;
441 unsigned int gt_statfs_quantum;
442 unsigned int gt_statfs_slow;
446 SDF_JOURNAL_CHECKED = 0,
447 SDF_JOURNAL_LIVE = 1,
452 #define GFS2_FSNAME_LEN 256
454 struct gfs2_inum_host {
459 struct gfs2_sb_host {
465 u32 sb_multihost_format;
469 struct gfs2_inum_host sb_master_dir;
470 struct gfs2_inum_host sb_root_dir;
472 char sb_lockproto[GFS2_LOCKNAME_LEN];
473 char sb_locktable[GFS2_LOCKNAME_LEN];
478 * lm_mount() return values
480 * ls_jid - the journal ID this node should use
481 * ls_first - this node is the first to mount the file system
482 * ls_lockspace - lock module's context for this file system
483 * ls_ops - lock module's functions
486 struct lm_lockstruct {
489 unsigned int ls_first;
490 unsigned int ls_first_done;
491 unsigned int ls_nodir;
492 const struct lm_lockops *ls_ops;
493 unsigned long ls_flags;
494 dlm_lockspace_t *ls_dlm;
497 int ls_recover_jid_done;
498 int ls_recover_jid_status;
502 struct super_block *sd_vfs;
503 struct kobject sd_kobj;
504 unsigned long sd_flags; /* SDF_... */
505 struct gfs2_sb_host sd_sb;
507 /* Constants computed on mount */
511 u32 sd_diptrs; /* Number of pointers in a dinode */
512 u32 sd_inptrs; /* Number of pointers in a indirect block */
513 u32 sd_jbsize; /* Size of a journaled data block */
514 u32 sd_hash_bsize; /* sizeof(exhash block) */
515 u32 sd_hash_bsize_shift;
516 u32 sd_hash_ptrs; /* Number of pointers in a hash block */
518 u32 sd_max_dirres; /* Max blocks needed to add a directory entry */
519 u32 sd_max_height; /* Max height of a file's metadata tree */
520 u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
521 u32 sd_max_jheight; /* Max height of journaled file's meta tree */
522 u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1];
524 struct gfs2_args sd_args; /* Mount arguments */
525 struct gfs2_tune sd_tune; /* Filesystem tuning structure */
529 struct lm_lockstruct sd_lockstruct;
530 struct gfs2_holder sd_live_gh;
531 struct gfs2_glock *sd_rename_gl;
532 struct gfs2_glock *sd_trans_gl;
536 struct dentry *sd_master_dir;
537 struct dentry *sd_root_dir;
539 struct inode *sd_jindex;
540 struct inode *sd_inum_inode;
541 struct inode *sd_statfs_inode;
542 struct inode *sd_ir_inode;
543 struct inode *sd_sc_inode;
544 struct inode *sd_qc_inode;
545 struct inode *sd_rindex;
546 struct inode *sd_quota_inode;
550 struct mutex sd_inum_mutex;
554 spinlock_t sd_statfs_spin;
555 struct gfs2_statfs_change_host sd_statfs_master;
556 struct gfs2_statfs_change_host sd_statfs_local;
558 /* Resource group stuff */
560 int sd_rindex_uptodate;
561 spinlock_t sd_rindex_spin;
562 struct mutex sd_rindex_mutex;
563 struct list_head sd_rindex_list;
564 struct list_head sd_rindex_mru_list;
565 struct gfs2_rgrpd *sd_rindex_forward;
566 unsigned int sd_rgrps;
568 /* Journal index stuff */
570 struct list_head sd_jindex_list;
571 spinlock_t sd_jindex_spin;
572 struct mutex sd_jindex_mutex;
573 unsigned int sd_journals;
575 struct gfs2_jdesc *sd_jdesc;
576 struct gfs2_holder sd_journal_gh;
577 struct gfs2_holder sd_jinode_gh;
579 struct gfs2_holder sd_ir_gh;
580 struct gfs2_holder sd_sc_gh;
581 struct gfs2_holder sd_qc_gh;
585 struct task_struct *sd_recoverd_process;
586 struct task_struct *sd_logd_process;
587 struct task_struct *sd_quotad_process;
591 struct list_head sd_quota_list;
592 atomic_t sd_quota_count;
593 struct mutex sd_quota_mutex;
594 wait_queue_head_t sd_quota_wait;
595 struct list_head sd_trunc_list;
596 spinlock_t sd_trunc_lock;
598 unsigned int sd_quota_slots;
599 unsigned int sd_quota_chunks;
600 unsigned char **sd_quota_bitmap;
602 u64 sd_quota_sync_gen;
606 spinlock_t sd_log_lock;
608 unsigned int sd_log_blks_reserved;
609 unsigned int sd_log_commited_buf;
610 unsigned int sd_log_commited_databuf;
611 unsigned int sd_log_commited_revoke;
613 unsigned int sd_log_num_buf;
614 unsigned int sd_log_num_revoke;
615 unsigned int sd_log_num_rg;
616 unsigned int sd_log_num_databuf;
618 struct list_head sd_log_le_buf;
619 struct list_head sd_log_le_revoke;
620 struct list_head sd_log_le_rg;
621 struct list_head sd_log_le_databuf;
622 struct list_head sd_log_le_ordered;
624 atomic_t sd_log_blks_free;
625 struct mutex sd_log_reserve_mutex;
628 unsigned int sd_log_head;
629 unsigned int sd_log_tail;
632 unsigned long sd_log_flush_time;
633 struct rw_semaphore sd_log_flush_lock;
634 atomic_t sd_log_in_flight;
635 wait_queue_head_t sd_log_flush_wait;
637 unsigned int sd_log_flush_head;
638 u64 sd_log_flush_wrapped;
640 struct list_head sd_ail1_list;
641 struct list_head sd_ail2_list;
646 struct list_head sd_revoke_list;
647 unsigned int sd_replay_tail;
649 unsigned int sd_found_blocks;
650 unsigned int sd_found_revokes;
651 unsigned int sd_replayed_blocks;
653 /* For quiescing the filesystem */
655 struct gfs2_holder sd_freeze_gh;
656 struct mutex sd_freeze_lock;
657 unsigned int sd_freeze_count;
659 char sd_fsname[GFS2_FSNAME_LEN];
660 char sd_table_name[GFS2_FSNAME_LEN];
661 char sd_proto_name[GFS2_FSNAME_LEN];
665 unsigned long sd_last_warning;
666 struct dentry *debugfs_dir; /* debugfs directory */
667 struct dentry *debugfs_dentry_glocks; /* for debugfs */
670 #endif /* __INCORE_DOT_H__ */