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;
68 struct buffer_head *bi_bh;
76 struct list_head rd_list; /* Link with superblock */
77 struct list_head rd_list_mru;
78 struct gfs2_glock *rd_gl; /* Glock for this rgrp */
79 u64 rd_addr; /* grp block disk address */
80 u64 rd_data0; /* first data location */
81 u32 rd_length; /* length of rgrp header in fs blocks */
82 u32 rd_data; /* num of data blocks in rgrp */
83 u32 rd_bitbytes; /* number of bytes in data bitmaps */
88 struct gfs2_bitmap *rd_bits;
89 struct mutex rd_mutex;
90 struct gfs2_log_element rd_le;
91 struct gfs2_sbd *rd_sbd;
92 unsigned int rd_bh_count;
94 unsigned char rd_flags;
95 #define GFS2_RDF_CHECK 0x01 /* Need to check for unlinked inodes */
96 #define GFS2_RDF_NOALLOC 0x02 /* rg prohibits allocation */
97 #define GFS2_RDF_UPTODATE 0x04 /* rg is up to date */
100 enum gfs2_state_bits {
101 BH_Pinned = BH_PrivateStart,
102 BH_Escaped = BH_PrivateStart + 1,
105 BUFFER_FNS(Pinned, pinned)
106 TAS_BUFFER_FNS(Pinned, pinned)
107 BUFFER_FNS(Escaped, escaped)
108 TAS_BUFFER_FNS(Escaped, escaped)
110 struct gfs2_bufdata {
111 struct buffer_head *bd_bh;
112 struct gfs2_glock *bd_gl;
115 struct list_head list_tr;
118 #define bd_list_tr u.list_tr
119 #define bd_blkno u.blkno
121 struct gfs2_log_element bd_le;
123 struct gfs2_ail *bd_ail;
124 struct list_head bd_ail_st_list;
125 struct list_head bd_ail_gl_list;
129 * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
130 * prefix of lock_dlm_ gets awkward.
133 #define GDLM_STRNAME_BYTES 25
134 #define GDLM_LVB_SIZE 32
142 unsigned int ln_type;
145 #define lm_name_equal(name1, name2) \
146 (((name1)->ln_number == (name2)->ln_number) && \
147 ((name1)->ln_type == (name2)->ln_type))
150 struct gfs2_glock_operations {
151 void (*go_xmote_th) (struct gfs2_glock *gl);
152 int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);
153 void (*go_inval) (struct gfs2_glock *gl, int flags);
154 int (*go_demote_ok) (const struct gfs2_glock *gl);
155 int (*go_lock) (struct gfs2_holder *gh);
156 void (*go_unlock) (struct gfs2_holder *gh);
157 int (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl);
159 const unsigned long go_min_hold_time;
164 HIF_HOLDER = 6, /* Set for gh that "holds" the glock */
170 struct list_head gh_list;
172 struct gfs2_glock *gh_gl;
173 struct pid *gh_owner_pid;
174 unsigned int gh_state;
178 unsigned long gh_iflags; /* HIF_... */
185 GLF_PENDING_DEMOTE = 4,
186 GLF_DEMOTE_IN_PROGRESS = 5,
189 GLF_INVALIDATE_IN_PROGRESS = 8,
190 GLF_REPLY_PENDING = 9,
196 struct hlist_node gl_list;
197 unsigned long gl_flags; /* GLF_... */
198 struct lm_lockname gl_name;
203 unsigned int gl_state;
204 unsigned int gl_target;
205 unsigned int gl_reply;
206 unsigned int gl_hash;
208 unsigned int gl_demote_state; /* state requested by remote node */
209 unsigned long gl_demote_time; /* time of first demote request */
210 struct list_head gl_holders;
212 const struct gfs2_glock_operations *gl_ops;
213 char gl_strname[GDLM_STRNAME_BYTES];
214 struct dlm_lksb gl_lksb;
216 unsigned long gl_tchange;
219 struct list_head gl_lru;
221 struct gfs2_sbd *gl_sbd;
223 struct inode *gl_aspace;
224 struct list_head gl_ail_list;
225 atomic_t gl_ail_count;
226 struct delayed_work gl_work;
229 #define GFS2_MIN_LVB_SIZE 32 /* Min size of LVB that gfs2 supports */
234 struct gfs2_quota_data *al_qd[2*MAXQUOTAS];
235 struct gfs2_holder al_qd_ghs[2*MAXQUOTAS];
236 unsigned int al_qd_num;
238 u32 al_requested; /* Filled in by caller of gfs2_inplace_reserve() */
239 u32 al_alloced; /* Filled in by gfs2_alloc_*() */
241 /* Filled in by gfs2_inplace_reserve() */
243 unsigned int al_line;
245 struct gfs2_holder al_ri_gh;
246 struct gfs2_holder al_rgd_gh;
247 struct gfs2_rgrpd *al_rgd;
255 GIF_USER = 4, /* user inode, not metadata addr space */
260 struct inode i_inode;
266 unsigned long i_flags; /* GIF_... */
267 struct gfs2_glock *i_gl; /* Move into i_gh? */
268 struct gfs2_holder i_iopen_gh;
269 struct gfs2_holder i_gh; /* for prepare/commit_write only */
270 struct gfs2_alloc *i_alloc;
271 u64 i_goal; /* goal block for allocations */
272 struct rw_semaphore i_rw_mutex;
273 struct list_head i_trunc_list;
281 * Since i_inode is the first element of struct gfs2_inode,
282 * this is effectively a cast.
284 static inline struct gfs2_inode *GFS2_I(struct inode *inode)
286 return container_of(inode, struct gfs2_inode, i_inode);
289 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
291 return inode->i_sb->s_fs_info;
295 struct mutex f_fl_mutex;
296 struct gfs2_holder f_fl_gh;
299 struct gfs2_revoke_replay {
300 struct list_head rr_list;
302 unsigned int rr_where;
311 struct gfs2_quota_data {
312 struct list_head qd_list;
313 struct list_head qd_reclaim;
318 unsigned long qd_flags; /* QDF_... */
323 unsigned int qd_slot;
324 unsigned int qd_slot_count;
326 struct buffer_head *qd_bh;
327 struct gfs2_quota_change *qd_bh_qc;
328 unsigned int qd_bh_count;
330 struct gfs2_glock *qd_gl;
331 struct gfs2_quota_lvb qd_qb;
334 unsigned long qd_last_warn;
340 unsigned int tr_blocks;
341 unsigned int tr_revokes;
342 unsigned int tr_reserved;
344 struct gfs2_holder tr_t_gh;
348 unsigned int tr_num_buf;
349 unsigned int tr_num_buf_new;
350 unsigned int tr_num_databuf_new;
351 unsigned int tr_num_buf_rm;
352 unsigned int tr_num_databuf_rm;
353 struct list_head tr_list_buf;
355 unsigned int tr_num_revoke;
356 unsigned int tr_num_revoke_rm;
360 struct list_head ai_list;
362 unsigned int ai_first;
363 struct list_head ai_ail1_list;
364 struct list_head ai_ail2_list;
369 struct gfs2_journal_extent {
370 struct list_head extent_list;
372 unsigned int lblock; /* First logical block */
373 u64 dblock; /* First disk block */
378 struct list_head jd_list;
379 struct list_head extent_list;
380 struct slow_work jd_work;
381 struct inode *jd_inode;
382 unsigned long jd_flags;
383 #define JDF_RECOVERY 1
385 unsigned int jd_blocks;
388 struct gfs2_statfs_change_host {
394 #define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF
395 #define GFS2_QUOTA_OFF 0
396 #define GFS2_QUOTA_ACCOUNT 1
397 #define GFS2_QUOTA_ON 2
399 #define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED
400 #define GFS2_DATA_WRITEBACK 1
401 #define GFS2_DATA_ORDERED 2
404 char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
405 char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
406 char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
407 unsigned int ar_spectator:1; /* Don't get a journal */
408 unsigned int ar_ignore_local_fs:1; /* Ignore optimisations */
409 unsigned int ar_localflocks:1; /* Let the VFS do flock|fcntl */
410 unsigned int ar_localcaching:1; /* Local caching */
411 unsigned int ar_debug:1; /* Oops on errors */
412 unsigned int ar_upgrade:1; /* Upgrade ondisk format */
413 unsigned int ar_posix_acl:1; /* Enable posix acls */
414 unsigned int ar_quota:2; /* off/account/on */
415 unsigned int ar_suiddir:1; /* suiddir support */
416 unsigned int ar_data:2; /* ordered/writeback */
417 unsigned int ar_meta:1; /* mount metafs */
418 unsigned int ar_discard:1; /* discard requests */
419 int ar_commit; /* Commit interval */
425 unsigned int gt_incore_log_blocks;
426 unsigned int gt_log_flush_secs;
428 unsigned int gt_logd_secs;
430 unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
431 unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
432 unsigned int gt_quota_scale_num; /* Numerator */
433 unsigned int gt_quota_scale_den; /* Denominator */
434 unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
435 unsigned int gt_new_files_jdata;
436 unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
437 unsigned int gt_stall_secs; /* Detects trouble! */
438 unsigned int gt_complain_secs;
439 unsigned int gt_statfs_quantum;
440 unsigned int gt_statfs_slow;
444 SDF_JOURNAL_CHECKED = 0,
445 SDF_JOURNAL_LIVE = 1,
451 #define GFS2_FSNAME_LEN 256
453 struct gfs2_inum_host {
458 struct gfs2_sb_host {
464 u32 sb_multihost_format;
468 struct gfs2_inum_host sb_master_dir;
469 struct gfs2_inum_host sb_root_dir;
471 char sb_lockproto[GFS2_LOCKNAME_LEN];
472 char sb_locktable[GFS2_LOCKNAME_LEN];
477 * lm_mount() return values
479 * ls_jid - the journal ID this node should use
480 * ls_first - this node is the first to mount the file system
481 * ls_lockspace - lock module's context for this file system
482 * ls_ops - lock module's functions
485 struct lm_lockstruct {
488 unsigned int ls_first;
489 unsigned int ls_first_done;
490 unsigned int ls_nodir;
491 const struct lm_lockops *ls_ops;
492 unsigned long ls_flags;
493 dlm_lockspace_t *ls_dlm;
495 int ls_recover_jid_done;
496 int ls_recover_jid_status;
500 struct super_block *sd_vfs;
501 struct kobject sd_kobj;
502 unsigned long sd_flags; /* SDF_... */
503 struct gfs2_sb_host sd_sb;
505 /* Constants computed on mount */
509 u32 sd_diptrs; /* Number of pointers in a dinode */
510 u32 sd_inptrs; /* Number of pointers in a indirect block */
511 u32 sd_jbsize; /* Size of a journaled data block */
512 u32 sd_hash_bsize; /* sizeof(exhash block) */
513 u32 sd_hash_bsize_shift;
514 u32 sd_hash_ptrs; /* Number of pointers in a hash block */
516 u32 sd_max_dirres; /* Max blocks needed to add a directory entry */
517 u32 sd_max_height; /* Max height of a file's metadata tree */
518 u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
519 u32 sd_max_jheight; /* Max height of journaled file's meta tree */
520 u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1];
522 struct gfs2_args sd_args; /* Mount arguments */
523 struct gfs2_tune sd_tune; /* Filesystem tuning structure */
527 struct lm_lockstruct sd_lockstruct;
528 struct gfs2_holder sd_live_gh;
529 struct gfs2_glock *sd_rename_gl;
530 struct gfs2_glock *sd_trans_gl;
534 struct dentry *sd_master_dir;
535 struct dentry *sd_root_dir;
537 struct inode *sd_jindex;
538 struct inode *sd_inum_inode;
539 struct inode *sd_statfs_inode;
540 struct inode *sd_ir_inode;
541 struct inode *sd_sc_inode;
542 struct inode *sd_qc_inode;
543 struct inode *sd_rindex;
544 struct inode *sd_quota_inode;
548 struct mutex sd_inum_mutex;
552 spinlock_t sd_statfs_spin;
553 struct gfs2_statfs_change_host sd_statfs_master;
554 struct gfs2_statfs_change_host sd_statfs_local;
556 /* Resource group stuff */
558 int sd_rindex_uptodate;
559 spinlock_t sd_rindex_spin;
560 struct mutex sd_rindex_mutex;
561 struct list_head sd_rindex_list;
562 struct list_head sd_rindex_mru_list;
563 struct gfs2_rgrpd *sd_rindex_forward;
564 unsigned int sd_rgrps;
566 /* Journal index stuff */
568 struct list_head sd_jindex_list;
569 spinlock_t sd_jindex_spin;
570 struct mutex sd_jindex_mutex;
571 unsigned int sd_journals;
573 struct gfs2_jdesc *sd_jdesc;
574 struct gfs2_holder sd_journal_gh;
575 struct gfs2_holder sd_jinode_gh;
577 struct gfs2_holder sd_ir_gh;
578 struct gfs2_holder sd_sc_gh;
579 struct gfs2_holder sd_qc_gh;
583 struct task_struct *sd_logd_process;
584 struct task_struct *sd_quotad_process;
588 struct list_head sd_quota_list;
589 atomic_t sd_quota_count;
590 struct mutex sd_quota_mutex;
591 wait_queue_head_t sd_quota_wait;
592 struct list_head sd_trunc_list;
593 spinlock_t sd_trunc_lock;
595 unsigned int sd_quota_slots;
596 unsigned int sd_quota_chunks;
597 unsigned char **sd_quota_bitmap;
599 u64 sd_quota_sync_gen;
603 spinlock_t sd_log_lock;
605 unsigned int sd_log_blks_reserved;
606 unsigned int sd_log_commited_buf;
607 unsigned int sd_log_commited_databuf;
608 unsigned int sd_log_commited_revoke;
610 unsigned int sd_log_num_buf;
611 unsigned int sd_log_num_revoke;
612 unsigned int sd_log_num_rg;
613 unsigned int sd_log_num_databuf;
615 struct list_head sd_log_le_buf;
616 struct list_head sd_log_le_revoke;
617 struct list_head sd_log_le_rg;
618 struct list_head sd_log_le_databuf;
619 struct list_head sd_log_le_ordered;
621 atomic_t sd_log_blks_free;
622 struct mutex sd_log_reserve_mutex;
625 unsigned int sd_log_head;
626 unsigned int sd_log_tail;
629 unsigned long sd_log_flush_time;
630 struct rw_semaphore sd_log_flush_lock;
631 atomic_t sd_log_in_flight;
632 wait_queue_head_t sd_log_flush_wait;
634 unsigned int sd_log_flush_head;
635 u64 sd_log_flush_wrapped;
637 struct list_head sd_ail1_list;
638 struct list_head sd_ail2_list;
643 struct list_head sd_revoke_list;
644 unsigned int sd_replay_tail;
646 unsigned int sd_found_blocks;
647 unsigned int sd_found_revokes;
648 unsigned int sd_replayed_blocks;
650 /* For quiescing the filesystem */
652 struct gfs2_holder sd_freeze_gh;
653 struct mutex sd_freeze_lock;
654 unsigned int sd_freeze_count;
656 char sd_fsname[GFS2_FSNAME_LEN];
657 char sd_table_name[GFS2_FSNAME_LEN];
658 char sd_proto_name[GFS2_FSNAME_LEN];
662 unsigned long sd_last_warning;
663 struct dentry *debugfs_dir; /* debugfs directory */
664 struct dentry *debugfs_dentry_glocks; /* for debugfs */
667 #endif /* __INCORE_DOT_H__ */