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>
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;
70 struct buffer_head *bi_bh;
72 unsigned long bi_flags;
79 struct list_head rd_list; /* Link with superblock */
80 struct list_head rd_list_mru;
81 struct gfs2_glock *rd_gl; /* Glock for this rgrp */
82 u64 rd_addr; /* grp block disk address */
83 u64 rd_data0; /* first data location */
84 u32 rd_length; /* length of rgrp header in fs blocks */
85 u32 rd_data; /* num of data blocks in rgrp */
86 u32 rd_bitbytes; /* number of bytes in data bitmaps */
91 struct gfs2_bitmap *rd_bits;
92 struct mutex rd_mutex;
93 struct gfs2_log_element rd_le;
94 struct gfs2_sbd *rd_sbd;
95 unsigned int rd_bh_count;
98 #define GFS2_RDF_CHECK 0x10000000 /* check for unlinked inodes */
99 #define GFS2_RDF_UPTODATE 0x20000000 /* rg is up to date */
100 #define GFS2_RDF_ERROR 0x40000000 /* error in rg */
101 #define GFS2_RDF_MASK 0xf0000000 /* mask for internal flags */
104 enum gfs2_state_bits {
105 BH_Pinned = BH_PrivateStart,
106 BH_Escaped = BH_PrivateStart + 1,
109 BUFFER_FNS(Pinned, pinned)
110 TAS_BUFFER_FNS(Pinned, pinned)
111 BUFFER_FNS(Escaped, escaped)
112 TAS_BUFFER_FNS(Escaped, escaped)
114 struct gfs2_bufdata {
115 struct buffer_head *bd_bh;
116 struct gfs2_glock *bd_gl;
119 struct list_head list_tr;
122 #define bd_list_tr u.list_tr
123 #define bd_blkno u.blkno
125 struct gfs2_log_element bd_le;
127 struct gfs2_ail *bd_ail;
128 struct list_head bd_ail_st_list;
129 struct list_head bd_ail_gl_list;
133 * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
134 * prefix of lock_dlm_ gets awkward.
137 #define GDLM_STRNAME_BYTES 25
138 #define GDLM_LVB_SIZE 32
146 unsigned int ln_type;
149 #define lm_name_equal(name1, name2) \
150 (((name1)->ln_number == (name2)->ln_number) && \
151 ((name1)->ln_type == (name2)->ln_type))
154 struct gfs2_glock_operations {
155 void (*go_xmote_th) (struct gfs2_glock *gl);
156 int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);
157 void (*go_inval) (struct gfs2_glock *gl, int flags);
158 int (*go_demote_ok) (const struct gfs2_glock *gl);
159 int (*go_lock) (struct gfs2_holder *gh);
160 void (*go_unlock) (struct gfs2_holder *gh);
161 int (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl);
162 void (*go_callback) (struct gfs2_glock *gl);
164 const unsigned long go_min_hold_time;
165 const unsigned long go_flags;
166 #define GLOF_ASPACE 1
171 HIF_HOLDER = 6, /* Set for gh that "holds" the glock */
177 struct list_head gh_list;
179 struct gfs2_glock *gh_gl;
180 struct pid *gh_owner_pid;
181 unsigned int gh_state;
185 unsigned long gh_iflags; /* HIF_... */
192 GLF_PENDING_DEMOTE = 4,
193 GLF_DEMOTE_IN_PROGRESS = 5,
196 GLF_INVALIDATE_IN_PROGRESS = 8,
197 GLF_REPLY_PENDING = 9,
204 struct hlist_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 */
220 struct list_head gl_holders;
222 const struct gfs2_glock_operations *gl_ops;
223 char gl_strname[GDLM_STRNAME_BYTES];
224 struct dlm_lksb gl_lksb;
226 unsigned long gl_tchange;
229 struct list_head gl_lru;
231 struct gfs2_sbd *gl_sbd;
233 struct list_head gl_ail_list;
234 atomic_t gl_ail_count;
235 struct delayed_work gl_work;
236 struct work_struct gl_delete;
239 #define GFS2_MIN_LVB_SIZE 32 /* Min size of LVB that gfs2 supports */
244 struct gfs2_quota_data *al_qd[2*MAXQUOTAS];
245 struct gfs2_holder al_qd_ghs[2*MAXQUOTAS];
246 unsigned int al_qd_num;
248 u32 al_requested; /* Filled in by caller of gfs2_inplace_reserve() */
249 u32 al_alloced; /* Filled in by gfs2_alloc_*() */
251 /* Filled in by gfs2_inplace_reserve() */
253 unsigned int al_line;
255 struct gfs2_holder al_ri_gh;
256 struct gfs2_holder al_rgd_gh;
257 struct gfs2_rgrpd *al_rgd;
269 struct inode i_inode;
274 unsigned long i_flags; /* GIF_... */
275 struct gfs2_glock *i_gl; /* Move into i_gh? */
276 struct gfs2_holder i_iopen_gh;
277 struct gfs2_holder i_gh; /* for prepare/commit_write only */
278 struct gfs2_alloc *i_alloc;
279 u64 i_goal; /* goal block for allocations */
280 struct rw_semaphore i_rw_mutex;
281 struct list_head i_trunc_list;
289 * Since i_inode is the first element of struct gfs2_inode,
290 * this is effectively a cast.
292 static inline struct gfs2_inode *GFS2_I(struct inode *inode)
294 return container_of(inode, struct gfs2_inode, i_inode);
297 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
299 return inode->i_sb->s_fs_info;
303 struct mutex f_fl_mutex;
304 struct gfs2_holder f_fl_gh;
307 struct gfs2_revoke_replay {
308 struct list_head rr_list;
310 unsigned int rr_where;
319 struct gfs2_quota_data {
320 struct list_head qd_list;
321 struct list_head qd_reclaim;
326 unsigned long qd_flags; /* QDF_... */
331 unsigned int qd_slot;
332 unsigned int qd_slot_count;
334 struct buffer_head *qd_bh;
335 struct gfs2_quota_change *qd_bh_qc;
336 unsigned int qd_bh_count;
338 struct gfs2_glock *qd_gl;
339 struct gfs2_quota_lvb qd_qb;
342 unsigned long qd_last_warn;
348 unsigned int tr_blocks;
349 unsigned int tr_revokes;
350 unsigned int tr_reserved;
352 struct gfs2_holder tr_t_gh;
356 unsigned int tr_num_buf;
357 unsigned int tr_num_buf_new;
358 unsigned int tr_num_databuf_new;
359 unsigned int tr_num_buf_rm;
360 unsigned int tr_num_databuf_rm;
361 struct list_head tr_list_buf;
363 unsigned int tr_num_revoke;
364 unsigned int tr_num_revoke_rm;
368 struct list_head ai_list;
370 unsigned int ai_first;
371 struct list_head ai_ail1_list;
372 struct list_head ai_ail2_list;
377 struct gfs2_journal_extent {
378 struct list_head extent_list;
380 unsigned int lblock; /* First logical block */
381 u64 dblock; /* First disk block */
386 struct list_head jd_list;
387 struct list_head extent_list;
388 struct work_struct jd_work;
389 struct inode *jd_inode;
390 unsigned long jd_flags;
391 #define JDF_RECOVERY 1
393 unsigned int jd_blocks;
396 struct gfs2_statfs_change_host {
402 #define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF
403 #define GFS2_QUOTA_OFF 0
404 #define GFS2_QUOTA_ACCOUNT 1
405 #define GFS2_QUOTA_ON 2
407 #define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED
408 #define GFS2_DATA_WRITEBACK 1
409 #define GFS2_DATA_ORDERED 2
411 #define GFS2_ERRORS_DEFAULT GFS2_ERRORS_WITHDRAW
412 #define GFS2_ERRORS_WITHDRAW 0
413 #define GFS2_ERRORS_CONTINUE 1 /* place holder for future feature */
414 #define GFS2_ERRORS_RO 2 /* place holder for future feature */
415 #define GFS2_ERRORS_PANIC 3
418 char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
419 char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
420 char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
421 unsigned int ar_spectator:1; /* Don't get a journal */
422 unsigned int ar_localflocks:1; /* Let the VFS do flock|fcntl */
423 unsigned int ar_debug:1; /* Oops on errors */
424 unsigned int ar_posix_acl:1; /* Enable posix acls */
425 unsigned int ar_quota:2; /* off/account/on */
426 unsigned int ar_suiddir:1; /* suiddir support */
427 unsigned int ar_data:2; /* ordered/writeback */
428 unsigned int ar_meta:1; /* mount metafs */
429 unsigned int ar_discard:1; /* discard requests */
430 unsigned int ar_errors:2; /* errors=withdraw | panic */
431 unsigned int ar_nobarrier:1; /* do not send barriers */
432 int ar_commit; /* Commit interval */
433 int ar_statfs_quantum; /* The fast statfs interval */
434 int ar_quota_quantum; /* The quota interval */
435 int ar_statfs_percent; /* The % change to force sync */
441 unsigned int gt_logd_secs;
443 unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
444 unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
445 unsigned int gt_quota_scale_num; /* Numerator */
446 unsigned int gt_quota_scale_den; /* Denominator */
447 unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
448 unsigned int gt_new_files_jdata;
449 unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
450 unsigned int gt_complain_secs;
451 unsigned int gt_statfs_quantum;
452 unsigned int gt_statfs_slow;
456 SDF_JOURNAL_CHECKED = 0,
457 SDF_JOURNAL_LIVE = 1,
465 #define GFS2_FSNAME_LEN 256
467 struct gfs2_inum_host {
472 struct gfs2_sb_host {
478 u32 sb_multihost_format;
482 struct gfs2_inum_host sb_master_dir;
483 struct gfs2_inum_host sb_root_dir;
485 char sb_lockproto[GFS2_LOCKNAME_LEN];
486 char sb_locktable[GFS2_LOCKNAME_LEN];
491 * lm_mount() return values
493 * ls_jid - the journal ID this node should use
494 * ls_first - this node is the first to mount the file system
495 * ls_lockspace - lock module's context for this file system
496 * ls_ops - lock module's functions
499 struct lm_lockstruct {
501 unsigned int ls_first;
502 unsigned int ls_first_done;
503 unsigned int ls_nodir;
504 const struct lm_lockops *ls_ops;
505 unsigned long ls_flags;
506 dlm_lockspace_t *ls_dlm;
508 int ls_recover_jid_done;
509 int ls_recover_jid_status;
513 struct super_block *sd_vfs;
514 struct kobject sd_kobj;
515 unsigned long sd_flags; /* SDF_... */
516 struct gfs2_sb_host sd_sb;
518 /* Constants computed on mount */
522 u32 sd_diptrs; /* Number of pointers in a dinode */
523 u32 sd_inptrs; /* Number of pointers in a indirect block */
524 u32 sd_jbsize; /* Size of a journaled data block */
525 u32 sd_hash_bsize; /* sizeof(exhash block) */
526 u32 sd_hash_bsize_shift;
527 u32 sd_hash_ptrs; /* Number of pointers in a hash block */
529 u32 sd_max_dirres; /* Max blocks needed to add a directory entry */
530 u32 sd_max_height; /* Max height of a file's metadata tree */
531 u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
532 u32 sd_max_jheight; /* Max height of journaled file's meta tree */
533 u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1];
535 struct gfs2_args sd_args; /* Mount arguments */
536 struct gfs2_tune sd_tune; /* Filesystem tuning structure */
540 struct lm_lockstruct sd_lockstruct;
541 struct gfs2_holder sd_live_gh;
542 struct gfs2_glock *sd_rename_gl;
543 struct gfs2_glock *sd_trans_gl;
544 wait_queue_head_t sd_glock_wait;
545 atomic_t sd_glock_disposal;
549 struct dentry *sd_master_dir;
550 struct dentry *sd_root_dir;
552 struct inode *sd_jindex;
553 struct inode *sd_statfs_inode;
554 struct inode *sd_sc_inode;
555 struct inode *sd_qc_inode;
556 struct inode *sd_rindex;
557 struct inode *sd_quota_inode;
561 spinlock_t sd_statfs_spin;
562 struct gfs2_statfs_change_host sd_statfs_master;
563 struct gfs2_statfs_change_host sd_statfs_local;
564 int sd_statfs_force_sync;
566 /* Resource group stuff */
568 int sd_rindex_uptodate;
569 spinlock_t sd_rindex_spin;
570 struct mutex sd_rindex_mutex;
571 struct list_head sd_rindex_list;
572 struct list_head sd_rindex_mru_list;
573 struct gfs2_rgrpd *sd_rindex_forward;
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 struct list_head sd_ail1_list;
651 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__ */