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;
69 struct buffer_head *bi_bh;
71 unsigned long bi_flags;
78 struct list_head rd_list; /* Link with superblock */
79 struct list_head rd_list_mru;
80 struct gfs2_glock *rd_gl; /* Glock for this rgrp */
81 u64 rd_addr; /* grp block disk address */
82 u64 rd_data0; /* first data location */
83 u32 rd_length; /* length of rgrp header in fs blocks */
84 u32 rd_data; /* num of data blocks in rgrp */
85 u32 rd_bitbytes; /* number of bytes in data bitmaps */
90 struct gfs2_bitmap *rd_bits;
91 struct mutex rd_mutex;
92 struct gfs2_log_element rd_le;
93 struct gfs2_sbd *rd_sbd;
94 unsigned int rd_bh_count;
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_min_hold_time;
164 const unsigned long go_flags;
165 #define GLOF_ASPACE 1
170 HIF_HOLDER = 6, /* Set for gh that "holds" the glock */
176 struct list_head gh_list;
178 struct gfs2_glock *gh_gl;
179 struct pid *gh_owner_pid;
180 unsigned int gh_state;
184 unsigned long gh_iflags; /* HIF_... */
191 GLF_PENDING_DEMOTE = 4,
192 GLF_DEMOTE_IN_PROGRESS = 5,
195 GLF_INVALIDATE_IN_PROGRESS = 8,
196 GLF_REPLY_PENDING = 9,
203 struct hlist_node gl_list;
204 unsigned long gl_flags; /* GLF_... */
205 struct lm_lockname gl_name;
210 unsigned int gl_state;
211 unsigned int gl_target;
212 unsigned int gl_reply;
213 unsigned int gl_hash;
215 unsigned int gl_demote_state; /* state requested by remote node */
216 unsigned long gl_demote_time; /* time of first demote request */
217 struct list_head gl_holders;
219 const struct gfs2_glock_operations *gl_ops;
220 char gl_strname[GDLM_STRNAME_BYTES];
221 struct dlm_lksb gl_lksb;
223 unsigned long gl_tchange;
226 struct list_head gl_lru;
228 struct gfs2_sbd *gl_sbd;
230 struct list_head gl_ail_list;
231 atomic_t gl_ail_count;
232 struct delayed_work gl_work;
233 struct work_struct gl_delete;
236 #define GFS2_MIN_LVB_SIZE 32 /* Min size of LVB that gfs2 supports */
241 struct gfs2_quota_data *al_qd[2*MAXQUOTAS];
242 struct gfs2_holder al_qd_ghs[2*MAXQUOTAS];
243 unsigned int al_qd_num;
245 u32 al_requested; /* Filled in by caller of gfs2_inplace_reserve() */
246 u32 al_alloced; /* Filled in by gfs2_alloc_*() */
248 /* Filled in by gfs2_inplace_reserve() */
250 unsigned int al_line;
252 struct gfs2_holder al_ri_gh;
253 struct gfs2_holder al_rgd_gh;
254 struct gfs2_rgrpd *al_rgd;
266 struct inode i_inode;
271 unsigned long i_flags; /* GIF_... */
272 struct gfs2_glock *i_gl; /* Move into i_gh? */
273 struct gfs2_holder i_iopen_gh;
274 struct gfs2_holder i_gh; /* for prepare/commit_write only */
275 struct gfs2_alloc *i_alloc;
276 u64 i_goal; /* goal block for allocations */
277 struct rw_semaphore i_rw_mutex;
278 struct list_head i_trunc_list;
286 * Since i_inode is the first element of struct gfs2_inode,
287 * this is effectively a cast.
289 static inline struct gfs2_inode *GFS2_I(struct inode *inode)
291 return container_of(inode, struct gfs2_inode, i_inode);
294 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
296 return inode->i_sb->s_fs_info;
300 struct mutex f_fl_mutex;
301 struct gfs2_holder f_fl_gh;
304 struct gfs2_revoke_replay {
305 struct list_head rr_list;
307 unsigned int rr_where;
316 struct gfs2_quota_data {
317 struct list_head qd_list;
318 struct list_head qd_reclaim;
323 unsigned long qd_flags; /* QDF_... */
328 unsigned int qd_slot;
329 unsigned int qd_slot_count;
331 struct buffer_head *qd_bh;
332 struct gfs2_quota_change *qd_bh_qc;
333 unsigned int qd_bh_count;
335 struct gfs2_glock *qd_gl;
336 struct gfs2_quota_lvb qd_qb;
339 unsigned long qd_last_warn;
345 unsigned int tr_blocks;
346 unsigned int tr_revokes;
347 unsigned int tr_reserved;
349 struct gfs2_holder tr_t_gh;
353 unsigned int tr_num_buf;
354 unsigned int tr_num_buf_new;
355 unsigned int tr_num_databuf_new;
356 unsigned int tr_num_buf_rm;
357 unsigned int tr_num_databuf_rm;
358 struct list_head tr_list_buf;
360 unsigned int tr_num_revoke;
361 unsigned int tr_num_revoke_rm;
365 struct list_head ai_list;
367 unsigned int ai_first;
368 struct list_head ai_ail1_list;
369 struct list_head ai_ail2_list;
374 struct gfs2_journal_extent {
375 struct list_head extent_list;
377 unsigned int lblock; /* First logical block */
378 u64 dblock; /* First disk block */
383 struct list_head jd_list;
384 struct list_head extent_list;
385 struct work_struct jd_work;
386 struct inode *jd_inode;
387 unsigned long jd_flags;
388 #define JDF_RECOVERY 1
390 unsigned int jd_blocks;
393 struct gfs2_statfs_change_host {
399 #define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF
400 #define GFS2_QUOTA_OFF 0
401 #define GFS2_QUOTA_ACCOUNT 1
402 #define GFS2_QUOTA_ON 2
404 #define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED
405 #define GFS2_DATA_WRITEBACK 1
406 #define GFS2_DATA_ORDERED 2
408 #define GFS2_ERRORS_DEFAULT GFS2_ERRORS_WITHDRAW
409 #define GFS2_ERRORS_WITHDRAW 0
410 #define GFS2_ERRORS_CONTINUE 1 /* place holder for future feature */
411 #define GFS2_ERRORS_RO 2 /* place holder for future feature */
412 #define GFS2_ERRORS_PANIC 3
415 char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
416 char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
417 char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
418 unsigned int ar_spectator:1; /* Don't get a journal */
419 unsigned int ar_localflocks:1; /* Let the VFS do flock|fcntl */
420 unsigned int ar_debug:1; /* Oops on errors */
421 unsigned int ar_posix_acl:1; /* Enable posix acls */
422 unsigned int ar_quota:2; /* off/account/on */
423 unsigned int ar_suiddir:1; /* suiddir support */
424 unsigned int ar_data:2; /* ordered/writeback */
425 unsigned int ar_meta:1; /* mount metafs */
426 unsigned int ar_discard:1; /* discard requests */
427 unsigned int ar_errors:2; /* errors=withdraw | panic */
428 unsigned int ar_nobarrier:1; /* do not send barriers */
429 int ar_commit; /* Commit interval */
430 int ar_statfs_quantum; /* The fast statfs interval */
431 int ar_quota_quantum; /* The quota interval */
432 int ar_statfs_percent; /* The % change to force sync */
438 unsigned int gt_logd_secs;
440 unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
441 unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
442 unsigned int gt_quota_scale_num; /* Numerator */
443 unsigned int gt_quota_scale_den; /* Denominator */
444 unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
445 unsigned int gt_new_files_jdata;
446 unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
447 unsigned int gt_complain_secs;
448 unsigned int gt_statfs_quantum;
449 unsigned int gt_statfs_slow;
453 SDF_JOURNAL_CHECKED = 0,
454 SDF_JOURNAL_LIVE = 1,
462 #define GFS2_FSNAME_LEN 256
464 struct gfs2_inum_host {
469 struct gfs2_sb_host {
475 u32 sb_multihost_format;
479 struct gfs2_inum_host sb_master_dir;
480 struct gfs2_inum_host sb_root_dir;
482 char sb_lockproto[GFS2_LOCKNAME_LEN];
483 char sb_locktable[GFS2_LOCKNAME_LEN];
488 * lm_mount() return values
490 * ls_jid - the journal ID this node should use
491 * ls_first - this node is the first to mount the file system
492 * ls_lockspace - lock module's context for this file system
493 * ls_ops - lock module's functions
496 struct lm_lockstruct {
498 unsigned int ls_first;
499 unsigned int ls_first_done;
500 unsigned int ls_nodir;
501 const struct lm_lockops *ls_ops;
502 unsigned long ls_flags;
503 dlm_lockspace_t *ls_dlm;
505 int ls_recover_jid_done;
506 int ls_recover_jid_status;
510 struct super_block *sd_vfs;
511 struct kobject sd_kobj;
512 unsigned long sd_flags; /* SDF_... */
513 struct gfs2_sb_host sd_sb;
515 /* Constants computed on mount */
519 u32 sd_diptrs; /* Number of pointers in a dinode */
520 u32 sd_inptrs; /* Number of pointers in a indirect block */
521 u32 sd_jbsize; /* Size of a journaled data block */
522 u32 sd_hash_bsize; /* sizeof(exhash block) */
523 u32 sd_hash_bsize_shift;
524 u32 sd_hash_ptrs; /* Number of pointers in a hash block */
526 u32 sd_max_dirres; /* Max blocks needed to add a directory entry */
527 u32 sd_max_height; /* Max height of a file's metadata tree */
528 u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
529 u32 sd_max_jheight; /* Max height of journaled file's meta tree */
530 u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1];
532 struct gfs2_args sd_args; /* Mount arguments */
533 struct gfs2_tune sd_tune; /* Filesystem tuning structure */
537 struct lm_lockstruct sd_lockstruct;
538 struct gfs2_holder sd_live_gh;
539 struct gfs2_glock *sd_rename_gl;
540 struct gfs2_glock *sd_trans_gl;
541 wait_queue_head_t sd_glock_wait;
542 atomic_t sd_glock_disposal;
546 struct dentry *sd_master_dir;
547 struct dentry *sd_root_dir;
549 struct inode *sd_jindex;
550 struct inode *sd_statfs_inode;
551 struct inode *sd_sc_inode;
552 struct inode *sd_qc_inode;
553 struct inode *sd_rindex;
554 struct inode *sd_quota_inode;
558 spinlock_t sd_statfs_spin;
559 struct gfs2_statfs_change_host sd_statfs_master;
560 struct gfs2_statfs_change_host sd_statfs_local;
561 int sd_statfs_force_sync;
563 /* Resource group stuff */
565 int sd_rindex_uptodate;
566 spinlock_t sd_rindex_spin;
567 struct mutex sd_rindex_mutex;
568 struct list_head sd_rindex_list;
569 struct list_head sd_rindex_mru_list;
570 struct gfs2_rgrpd *sd_rindex_forward;
571 unsigned int sd_rgrps;
572 unsigned int sd_max_rg_data;
574 /* Journal index stuff */
576 struct list_head sd_jindex_list;
577 spinlock_t sd_jindex_spin;
578 struct mutex sd_jindex_mutex;
579 unsigned int sd_journals;
581 struct gfs2_jdesc *sd_jdesc;
582 struct gfs2_holder sd_journal_gh;
583 struct gfs2_holder sd_jinode_gh;
585 struct gfs2_holder sd_sc_gh;
586 struct gfs2_holder sd_qc_gh;
590 struct task_struct *sd_logd_process;
591 struct task_struct *sd_quotad_process;
595 struct list_head sd_quota_list;
596 atomic_t sd_quota_count;
597 struct mutex sd_quota_mutex;
598 wait_queue_head_t sd_quota_wait;
599 struct list_head sd_trunc_list;
600 spinlock_t sd_trunc_lock;
602 unsigned int sd_quota_slots;
603 unsigned int sd_quota_chunks;
604 unsigned char **sd_quota_bitmap;
606 u64 sd_quota_sync_gen;
610 spinlock_t sd_log_lock;
612 unsigned int sd_log_blks_reserved;
613 unsigned int sd_log_commited_buf;
614 unsigned int sd_log_commited_databuf;
615 int sd_log_commited_revoke;
617 atomic_t sd_log_pinned;
618 unsigned int sd_log_num_buf;
619 unsigned int sd_log_num_revoke;
620 unsigned int sd_log_num_rg;
621 unsigned int sd_log_num_databuf;
623 struct list_head sd_log_le_buf;
624 struct list_head sd_log_le_revoke;
625 struct list_head sd_log_le_rg;
626 struct list_head sd_log_le_databuf;
627 struct list_head sd_log_le_ordered;
629 atomic_t sd_log_thresh1;
630 atomic_t sd_log_thresh2;
631 atomic_t sd_log_blks_free;
632 wait_queue_head_t sd_log_waitq;
633 wait_queue_head_t sd_logd_waitq;
636 unsigned int sd_log_head;
637 unsigned int sd_log_tail;
640 struct rw_semaphore sd_log_flush_lock;
641 atomic_t sd_log_in_flight;
642 wait_queue_head_t sd_log_flush_wait;
644 unsigned int sd_log_flush_head;
645 u64 sd_log_flush_wrapped;
647 struct list_head sd_ail1_list;
648 struct list_head sd_ail2_list;
653 struct list_head sd_revoke_list;
654 unsigned int sd_replay_tail;
656 unsigned int sd_found_blocks;
657 unsigned int sd_found_revokes;
658 unsigned int sd_replayed_blocks;
660 /* For quiescing the filesystem */
662 struct gfs2_holder sd_freeze_gh;
663 struct mutex sd_freeze_lock;
664 unsigned int sd_freeze_count;
666 char sd_fsname[GFS2_FSNAME_LEN];
667 char sd_table_name[GFS2_FSNAME_LEN];
668 char sd_proto_name[GFS2_FSNAME_LEN];
672 unsigned long sd_last_warning;
673 struct dentry *debugfs_dir; /* debugfs directory */
674 struct dentry *debugfs_dentry_glocks; /* for debugfs */
677 #endif /* __INCORE_DOT_H__ */