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 0x10000000 /* check for unlinked inodes */
96 #define GFS2_RDF_UPTODATE 0x20000000 /* rg is up to date */
97 #define GFS2_RDF_ERROR 0x40000000 /* error in rg */
98 #define GFS2_RDF_MASK 0xf0000000 /* mask for internal flags */
101 enum gfs2_state_bits {
102 BH_Pinned = BH_PrivateStart,
103 BH_Escaped = BH_PrivateStart + 1,
106 BUFFER_FNS(Pinned, pinned)
107 TAS_BUFFER_FNS(Pinned, pinned)
108 BUFFER_FNS(Escaped, escaped)
109 TAS_BUFFER_FNS(Escaped, escaped)
111 struct gfs2_bufdata {
112 struct buffer_head *bd_bh;
113 struct gfs2_glock *bd_gl;
116 struct list_head list_tr;
119 #define bd_list_tr u.list_tr
120 #define bd_blkno u.blkno
122 struct gfs2_log_element bd_le;
124 struct gfs2_ail *bd_ail;
125 struct list_head bd_ail_st_list;
126 struct list_head bd_ail_gl_list;
130 * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
131 * prefix of lock_dlm_ gets awkward.
134 #define GDLM_STRNAME_BYTES 25
135 #define GDLM_LVB_SIZE 32
143 unsigned int ln_type;
146 #define lm_name_equal(name1, name2) \
147 (((name1)->ln_number == (name2)->ln_number) && \
148 ((name1)->ln_type == (name2)->ln_type))
151 struct gfs2_glock_operations {
152 void (*go_xmote_th) (struct gfs2_glock *gl);
153 int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);
154 void (*go_inval) (struct gfs2_glock *gl, int flags);
155 int (*go_demote_ok) (const struct gfs2_glock *gl);
156 int (*go_lock) (struct gfs2_holder *gh);
157 void (*go_unlock) (struct gfs2_holder *gh);
158 int (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl);
160 const unsigned long go_min_hold_time;
165 HIF_HOLDER = 6, /* Set for gh that "holds" the glock */
171 struct list_head gh_list;
173 struct gfs2_glock *gh_gl;
174 struct pid *gh_owner_pid;
175 unsigned int gh_state;
179 unsigned long gh_iflags; /* HIF_... */
186 GLF_PENDING_DEMOTE = 4,
187 GLF_DEMOTE_IN_PROGRESS = 5,
190 GLF_INVALIDATE_IN_PROGRESS = 8,
191 GLF_REPLY_PENDING = 9,
197 struct hlist_node gl_list;
198 unsigned long gl_flags; /* GLF_... */
199 struct lm_lockname gl_name;
204 unsigned int gl_state;
205 unsigned int gl_target;
206 unsigned int gl_reply;
207 unsigned int gl_hash;
209 unsigned int gl_demote_state; /* state requested by remote node */
210 unsigned long gl_demote_time; /* time of first demote request */
211 struct list_head gl_holders;
213 const struct gfs2_glock_operations *gl_ops;
214 char gl_strname[GDLM_STRNAME_BYTES];
215 struct dlm_lksb gl_lksb;
217 unsigned long gl_tchange;
220 struct list_head gl_lru;
222 struct gfs2_sbd *gl_sbd;
224 struct inode *gl_aspace;
225 struct list_head gl_ail_list;
226 atomic_t gl_ail_count;
227 struct delayed_work gl_work;
230 #define GFS2_MIN_LVB_SIZE 32 /* Min size of LVB that gfs2 supports */
235 struct gfs2_quota_data *al_qd[2*MAXQUOTAS];
236 struct gfs2_holder al_qd_ghs[2*MAXQUOTAS];
237 unsigned int al_qd_num;
239 u32 al_requested; /* Filled in by caller of gfs2_inplace_reserve() */
240 u32 al_alloced; /* Filled in by gfs2_alloc_*() */
242 /* Filled in by gfs2_inplace_reserve() */
244 unsigned int al_line;
246 struct gfs2_holder al_ri_gh;
247 struct gfs2_holder al_rgd_gh;
248 struct gfs2_rgrpd *al_rgd;
256 GIF_USER = 4, /* user inode, not metadata addr space */
261 struct inode i_inode;
267 unsigned long i_flags; /* GIF_... */
268 struct gfs2_glock *i_gl; /* Move into i_gh? */
269 struct gfs2_holder i_iopen_gh;
270 struct gfs2_holder i_gh; /* for prepare/commit_write only */
271 struct gfs2_alloc *i_alloc;
272 u64 i_goal; /* goal block for allocations */
273 struct rw_semaphore i_rw_mutex;
274 struct list_head i_trunc_list;
282 * Since i_inode is the first element of struct gfs2_inode,
283 * this is effectively a cast.
285 static inline struct gfs2_inode *GFS2_I(struct inode *inode)
287 return container_of(inode, struct gfs2_inode, i_inode);
290 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
292 return inode->i_sb->s_fs_info;
296 struct mutex f_fl_mutex;
297 struct gfs2_holder f_fl_gh;
300 struct gfs2_revoke_replay {
301 struct list_head rr_list;
303 unsigned int rr_where;
312 struct gfs2_quota_data {
313 struct list_head qd_list;
314 struct list_head qd_reclaim;
319 unsigned long qd_flags; /* QDF_... */
324 unsigned int qd_slot;
325 unsigned int qd_slot_count;
327 struct buffer_head *qd_bh;
328 struct gfs2_quota_change *qd_bh_qc;
329 unsigned int qd_bh_count;
331 struct gfs2_glock *qd_gl;
332 struct gfs2_quota_lvb qd_qb;
335 unsigned long qd_last_warn;
341 unsigned int tr_blocks;
342 unsigned int tr_revokes;
343 unsigned int tr_reserved;
345 struct gfs2_holder tr_t_gh;
349 unsigned int tr_num_buf;
350 unsigned int tr_num_buf_new;
351 unsigned int tr_num_databuf_new;
352 unsigned int tr_num_buf_rm;
353 unsigned int tr_num_databuf_rm;
354 struct list_head tr_list_buf;
356 unsigned int tr_num_revoke;
357 unsigned int tr_num_revoke_rm;
361 struct list_head ai_list;
363 unsigned int ai_first;
364 struct list_head ai_ail1_list;
365 struct list_head ai_ail2_list;
370 struct gfs2_journal_extent {
371 struct list_head extent_list;
373 unsigned int lblock; /* First logical block */
374 u64 dblock; /* First disk block */
379 struct list_head jd_list;
380 struct list_head extent_list;
381 struct slow_work jd_work;
382 struct inode *jd_inode;
383 unsigned long jd_flags;
384 #define JDF_RECOVERY 1
386 unsigned int jd_blocks;
389 struct gfs2_statfs_change_host {
395 #define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF
396 #define GFS2_QUOTA_OFF 0
397 #define GFS2_QUOTA_ACCOUNT 1
398 #define GFS2_QUOTA_ON 2
400 #define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED
401 #define GFS2_DATA_WRITEBACK 1
402 #define GFS2_DATA_ORDERED 2
405 char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
406 char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
407 char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
408 unsigned int ar_spectator:1; /* Don't get a journal */
409 unsigned int ar_ignore_local_fs:1; /* Ignore optimisations */
410 unsigned int ar_localflocks:1; /* Let the VFS do flock|fcntl */
411 unsigned int ar_localcaching:1; /* Local caching */
412 unsigned int ar_debug:1; /* Oops on errors */
413 unsigned int ar_upgrade:1; /* Upgrade ondisk format */
414 unsigned int ar_posix_acl:1; /* Enable posix acls */
415 unsigned int ar_quota:2; /* off/account/on */
416 unsigned int ar_suiddir:1; /* suiddir support */
417 unsigned int ar_data:2; /* ordered/writeback */
418 unsigned int ar_meta:1; /* mount metafs */
419 unsigned int ar_discard:1; /* discard requests */
420 int ar_commit; /* Commit interval */
426 unsigned int gt_incore_log_blocks;
427 unsigned int gt_log_flush_secs;
429 unsigned int gt_logd_secs;
431 unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
432 unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
433 unsigned int gt_quota_scale_num; /* Numerator */
434 unsigned int gt_quota_scale_den; /* Denominator */
435 unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
436 unsigned int gt_new_files_jdata;
437 unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
438 unsigned int gt_stall_secs; /* Detects trouble! */
439 unsigned int gt_complain_secs;
440 unsigned int gt_statfs_quantum;
441 unsigned int gt_statfs_slow;
445 SDF_JOURNAL_CHECKED = 0,
446 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;
496 int ls_recover_jid_done;
497 int ls_recover_jid_status;
501 struct super_block *sd_vfs;
502 struct kobject sd_kobj;
503 unsigned long sd_flags; /* SDF_... */
504 struct gfs2_sb_host sd_sb;
506 /* Constants computed on mount */
510 u32 sd_diptrs; /* Number of pointers in a dinode */
511 u32 sd_inptrs; /* Number of pointers in a indirect block */
512 u32 sd_jbsize; /* Size of a journaled data block */
513 u32 sd_hash_bsize; /* sizeof(exhash block) */
514 u32 sd_hash_bsize_shift;
515 u32 sd_hash_ptrs; /* Number of pointers in a hash block */
517 u32 sd_max_dirres; /* Max blocks needed to add a directory entry */
518 u32 sd_max_height; /* Max height of a file's metadata tree */
519 u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
520 u32 sd_max_jheight; /* Max height of journaled file's meta tree */
521 u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1];
523 struct gfs2_args sd_args; /* Mount arguments */
524 struct gfs2_tune sd_tune; /* Filesystem tuning structure */
528 struct lm_lockstruct sd_lockstruct;
529 struct gfs2_holder sd_live_gh;
530 struct gfs2_glock *sd_rename_gl;
531 struct gfs2_glock *sd_trans_gl;
535 struct dentry *sd_master_dir;
536 struct dentry *sd_root_dir;
538 struct inode *sd_jindex;
539 struct inode *sd_inum_inode;
540 struct inode *sd_statfs_inode;
541 struct inode *sd_ir_inode;
542 struct inode *sd_sc_inode;
543 struct inode *sd_qc_inode;
544 struct inode *sd_rindex;
545 struct inode *sd_quota_inode;
549 struct mutex sd_inum_mutex;
553 spinlock_t sd_statfs_spin;
554 struct gfs2_statfs_change_host sd_statfs_master;
555 struct gfs2_statfs_change_host sd_statfs_local;
557 /* Resource group stuff */
559 int sd_rindex_uptodate;
560 spinlock_t sd_rindex_spin;
561 struct mutex sd_rindex_mutex;
562 struct list_head sd_rindex_list;
563 struct list_head sd_rindex_mru_list;
564 struct gfs2_rgrpd *sd_rindex_forward;
565 unsigned int sd_rgrps;
567 /* Journal index stuff */
569 struct list_head sd_jindex_list;
570 spinlock_t sd_jindex_spin;
571 struct mutex sd_jindex_mutex;
572 unsigned int sd_journals;
574 struct gfs2_jdesc *sd_jdesc;
575 struct gfs2_holder sd_journal_gh;
576 struct gfs2_holder sd_jinode_gh;
578 struct gfs2_holder sd_ir_gh;
579 struct gfs2_holder sd_sc_gh;
580 struct gfs2_holder sd_qc_gh;
584 struct task_struct *sd_logd_process;
585 struct task_struct *sd_quotad_process;
589 struct list_head sd_quota_list;
590 atomic_t sd_quota_count;
591 struct mutex sd_quota_mutex;
592 wait_queue_head_t sd_quota_wait;
593 struct list_head sd_trunc_list;
594 spinlock_t sd_trunc_lock;
596 unsigned int sd_quota_slots;
597 unsigned int sd_quota_chunks;
598 unsigned char **sd_quota_bitmap;
600 u64 sd_quota_sync_gen;
604 spinlock_t sd_log_lock;
606 unsigned int sd_log_blks_reserved;
607 unsigned int sd_log_commited_buf;
608 unsigned int sd_log_commited_databuf;
609 unsigned int sd_log_commited_revoke;
611 unsigned int sd_log_num_buf;
612 unsigned int sd_log_num_revoke;
613 unsigned int sd_log_num_rg;
614 unsigned int sd_log_num_databuf;
616 struct list_head sd_log_le_buf;
617 struct list_head sd_log_le_revoke;
618 struct list_head sd_log_le_rg;
619 struct list_head sd_log_le_databuf;
620 struct list_head sd_log_le_ordered;
622 atomic_t sd_log_blks_free;
623 struct mutex sd_log_reserve_mutex;
626 unsigned int sd_log_head;
627 unsigned int sd_log_tail;
630 unsigned long sd_log_flush_time;
631 struct rw_semaphore sd_log_flush_lock;
632 atomic_t sd_log_in_flight;
633 wait_queue_head_t sd_log_flush_wait;
635 unsigned int sd_log_flush_head;
636 u64 sd_log_flush_wrapped;
638 struct list_head sd_ail1_list;
639 struct list_head sd_ail2_list;
644 struct list_head sd_revoke_list;
645 unsigned int sd_replay_tail;
647 unsigned int sd_found_blocks;
648 unsigned int sd_found_revokes;
649 unsigned int sd_replayed_blocks;
651 /* For quiescing the filesystem */
653 struct gfs2_holder sd_freeze_gh;
654 struct mutex sd_freeze_lock;
655 unsigned int sd_freeze_count;
657 char sd_fsname[GFS2_FSNAME_LEN];
658 char sd_table_name[GFS2_FSNAME_LEN];
659 char sd_proto_name[GFS2_FSNAME_LEN];
663 unsigned long sd_last_warning;
664 struct dentry *debugfs_dir; /* debugfs directory */
665 struct dentry *debugfs_dentry_glocks; /* for debugfs */
668 #endif /* __INCORE_DOT_H__ */