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__ */