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>
22 #include <linux/ktime.h>
23 #include <linux/percpu.h>
24 #include <linux/lockref.h>
25 #include <linux/rhashtable.h>
27 #define DIO_WAIT 0x00000010
28 #define DIO_METADATA 0x00000020
30 struct gfs2_log_operations;
34 struct gfs2_quota_data;
40 typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
42 struct gfs2_log_header_host {
43 u64 lh_sequence; /* Sequence number of this transaction */
44 u32 lh_flags; /* GFS2_LOG_HEAD_... */
45 u32 lh_tail; /* Block number of log tail */
50 * Structure of operations that are associated with each
51 * type of element in the log.
54 struct gfs2_log_operations {
55 void (*lo_before_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr);
56 void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr);
57 void (*lo_before_scan) (struct gfs2_jdesc *jd,
58 struct gfs2_log_header_host *head, int pass);
59 int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start,
60 struct gfs2_log_descriptor *ld, __be64 *ptr,
62 void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass);
69 * Clone bitmaps (bi_clone):
71 * - When a block is freed, we remember the previous state of the block in the
72 * clone bitmap, and only mark the block as free in the real bitmap.
74 * - When looking for a block to allocate, we check for a free block in the
75 * clone bitmap, and if no clone bitmap exists, in the real bitmap.
77 * - For allocating a block, we mark it as allocated in the real bitmap, and if
78 * a clone bitmap exists, also in the clone bitmap.
80 * - At the end of a log_flush, we copy the real bitmap into the clone bitmap
81 * to make the clone bitmap reflect the current allocation state.
82 * (Alternatively, we could remove the clone bitmap.)
84 * The clone bitmaps are in-core only, and is never written to disk.
86 * These steps ensure that blocks which have been freed in a transaction cannot
87 * be reallocated in that same transaction.
90 struct buffer_head *bi_bh;
92 unsigned long bi_flags;
100 struct rb_node rd_node; /* Link with superblock */
101 struct gfs2_glock *rd_gl; /* Glock for this rgrp */
102 u64 rd_addr; /* grp block disk address */
103 u64 rd_data0; /* first data location */
104 u32 rd_length; /* length of rgrp header in fs blocks */
105 u32 rd_data; /* num of data blocks in rgrp */
106 u32 rd_bitbytes; /* number of bytes in data bitmaps */
108 u32 rd_reserved; /* number of blocks reserved */
112 struct gfs2_bitmap *rd_bits;
113 struct gfs2_sbd *rd_sbd;
114 struct gfs2_rgrp_lvb *rd_rgl;
117 u32 rd_extfail_pt; /* extent failure point */
118 #define GFS2_RDF_CHECK 0x10000000 /* check for unlinked inodes */
119 #define GFS2_RDF_UPTODATE 0x20000000 /* rg is up to date */
120 #define GFS2_RDF_ERROR 0x40000000 /* error in rg */
121 #define GFS2_RDF_PREFERRED 0x80000000 /* This rgrp is preferred */
122 #define GFS2_RDF_MASK 0xf0000000 /* mask for internal flags */
123 spinlock_t rd_rsspin; /* protects reservation related vars */
124 struct rb_root rd_rstree; /* multi-block reservation tree */
128 struct gfs2_rgrpd *rgd;
129 u32 offset; /* The offset is bitmap relative */
130 int bii; /* Bitmap index */
133 static inline struct gfs2_bitmap *rbm_bi(const struct gfs2_rbm *rbm)
135 return rbm->rgd->rd_bits + rbm->bii;
138 static inline u64 gfs2_rbm_to_block(const struct gfs2_rbm *rbm)
140 BUG_ON(rbm->offset >= rbm->rgd->rd_data);
141 return rbm->rgd->rd_data0 + (rbm_bi(rbm)->bi_start * GFS2_NBBY) +
145 static inline bool gfs2_rbm_eq(const struct gfs2_rbm *rbm1,
146 const struct gfs2_rbm *rbm2)
148 return (rbm1->rgd == rbm2->rgd) && (rbm1->bii == rbm2->bii) &&
149 (rbm1->offset == rbm2->offset);
152 enum gfs2_state_bits {
153 BH_Pinned = BH_PrivateStart,
154 BH_Escaped = BH_PrivateStart + 1,
157 BUFFER_FNS(Pinned, pinned)
158 TAS_BUFFER_FNS(Pinned, pinned)
159 BUFFER_FNS(Escaped, escaped)
160 TAS_BUFFER_FNS(Escaped, escaped)
162 struct gfs2_bufdata {
163 struct buffer_head *bd_bh;
164 struct gfs2_glock *bd_gl;
167 struct list_head bd_list;
168 const struct gfs2_log_operations *bd_ops;
170 struct gfs2_trans *bd_tr;
171 struct list_head bd_ail_st_list;
172 struct list_head bd_ail_gl_list;
176 * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
177 * prefix of lock_dlm_ gets awkward.
180 #define GDLM_STRNAME_BYTES 25
181 #define GDLM_LVB_SIZE 32
186 * DFL_BLOCK_LOCKS: dlm is in recovery and will grant locks that had been
187 * held by failed nodes whose journals need recovery. Those locks should
188 * only be used for journal recovery until the journal recovery is done.
189 * This is set by the dlm recover_prep callback and cleared by the
190 * gfs2_control thread when journal recovery is complete. To avoid
191 * races between recover_prep setting and gfs2_control clearing, recover_spin
192 * is held while changing this bit and reading/writing recover_block
195 * DFL_NO_DLM_OPS: dlm lockspace ops/callbacks are not being used.
197 * DFL_FIRST_MOUNT: this node is the first to mount this fs and is doing
198 * recovery of all journals before allowing other nodes to mount the fs.
199 * This is cleared when FIRST_MOUNT_DONE is set.
201 * DFL_FIRST_MOUNT_DONE: this node was the first mounter, and has finished
202 * recovery of all journals, and now allows other nodes to mount the fs.
204 * DFL_MOUNT_DONE: gdlm_mount has completed successfully and cleared
205 * BLOCK_LOCKS for the first time. The gfs2_control thread should now
206 * control clearing BLOCK_LOCKS for further recoveries.
208 * DFL_UNMOUNT: gdlm_unmount sets to keep sdp off gfs2_control_wq.
210 * DFL_DLM_RECOVERY: set while dlm is in recovery, between recover_prep()
211 * and recover_done(), i.e. set while recover_block == recover_start.
218 DFL_FIRST_MOUNT_DONE = 3,
221 DFL_DLM_RECOVERY = 6,
225 * We are using struct lm_lockname as an rhashtable key. Avoid holes within
226 * the struct; padding at the end is fine.
230 struct gfs2_sbd *ln_sbd;
231 unsigned int ln_type;
234 #define lm_name_equal(name1, name2) \
235 (((name1)->ln_number == (name2)->ln_number) && \
236 ((name1)->ln_type == (name2)->ln_type) && \
237 ((name1)->ln_sbd == (name2)->ln_sbd))
240 struct gfs2_glock_operations {
241 void (*go_sync) (struct gfs2_glock *gl);
242 int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);
243 void (*go_inval) (struct gfs2_glock *gl, int flags);
244 int (*go_demote_ok) (const struct gfs2_glock *gl);
245 int (*go_lock) (struct gfs2_holder *gh);
246 void (*go_unlock) (struct gfs2_holder *gh);
247 void (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl);
248 void (*go_callback)(struct gfs2_glock *gl, bool remote);
250 const unsigned long go_flags;
251 #define GLOF_ASPACE 1
257 GFS2_LKS_SRTT = 0, /* Non blocking smoothed round trip time */
258 GFS2_LKS_SRTTVAR = 1, /* Non blocking smoothed variance */
259 GFS2_LKS_SRTTB = 2, /* Blocking smoothed round trip time */
260 GFS2_LKS_SRTTVARB = 3, /* Blocking smoothed variance */
261 GFS2_LKS_SIRT = 4, /* Smoothed Inter-request time */
262 GFS2_LKS_SIRTVAR = 5, /* Smoothed Inter-request variance */
263 GFS2_LKS_DCOUNT = 6, /* Count of dlm requests */
264 GFS2_LKS_QCOUNT = 7, /* Count of gfs2_holder queues */
268 struct gfs2_lkstats {
269 u64 stats[GFS2_NR_LKSTATS];
274 HIF_HOLDER = 6, /* Set for gh that "holds" the glock */
280 struct list_head gh_list;
282 struct gfs2_glock *gh_gl;
283 struct pid *gh_owner_pid;
288 unsigned long gh_iflags; /* HIF_... */
292 /* Number of quota types we support */
293 #define GFS2_MAXQUOTAS 2
295 struct gfs2_qadata { /* quota allocation data */
297 struct gfs2_quota_data *qa_qd[2 * GFS2_MAXQUOTAS];
298 struct gfs2_holder qa_qd_ghs[2 * GFS2_MAXQUOTAS];
299 unsigned int qa_qd_num;
302 /* Resource group multi-block reservation, in order of appearance:
304 Step 1. Function prepares to write, allocates a mb, sets the size hint.
305 Step 2. User calls inplace_reserve to target an rgrp, sets the rgrp info
306 Step 3. Function get_local_rgrp locks the rgrp, determines which bits to use
307 Step 4. Bits are assigned from the rgrp based on either the reservation
311 struct gfs2_blkreserv {
312 struct rb_node rs_node; /* link to other block reservations */
313 struct gfs2_rbm rs_rbm; /* Start of reservation */
314 u32 rs_free; /* how many blocks are still free */
318 * Allocation parameters
319 * @target: The number of blocks we'd ideally like to allocate
320 * @aflags: The flags (e.g. Orlov flag)
322 * The intent is to gradually expand this structure over time in
323 * order to give more information, e.g. alignment, min extent size
324 * to the allocation code.
326 struct gfs2_alloc_parms {
336 GLF_PENDING_DEMOTE = 4,
337 GLF_DEMOTE_IN_PROGRESS = 5,
340 GLF_INVALIDATE_IN_PROGRESS = 8,
341 GLF_REPLY_PENDING = 9,
346 GLF_OBJECT = 14, /* Used only for tracing */
348 GLF_INODE_CREATING = 16, /* Inode creation occurring */
352 unsigned long gl_flags; /* GLF_... */
353 struct lm_lockname gl_name;
355 struct lockref gl_lockref;
357 /* State fields protected by gl_lockref.lock */
358 unsigned int gl_state:2, /* Current state */
359 gl_target:2, /* Target state */
360 gl_demote_state:2, /* State requested by remote node */
361 gl_req:2, /* State in last dlm request */
362 gl_reply:8; /* Last reply from the dlm */
364 unsigned long gl_demote_time; /* time of first demote request */
366 struct list_head gl_holders;
368 const struct gfs2_glock_operations *gl_ops;
370 struct gfs2_lkstats gl_stats;
371 struct dlm_lksb gl_lksb;
372 unsigned long gl_tchange;
375 struct list_head gl_lru;
376 struct list_head gl_ail_list;
377 atomic_t gl_ail_count;
379 struct delayed_work gl_work;
381 /* For inode and iopen glocks only */
382 struct work_struct gl_delete;
383 /* For rgrp glocks only */
389 struct rcu_head gl_rcu;
390 struct rhash_head gl_node;
393 #define GFS2_MIN_LVB_SIZE 32 /* Min size of LVB that gfs2 supports */
398 GIF_ALLOC_FAILED = 2,
401 GIF_FREE_VFS_INODE = 5,
402 GIF_GLOP_PENDING = 6,
406 struct inode i_inode;
411 unsigned long i_flags; /* GIF_... */
412 struct gfs2_glock *i_gl; /* Move into i_gh? */
413 struct gfs2_holder i_iopen_gh;
414 struct gfs2_holder i_gh; /* for prepare/commit_write only */
415 struct gfs2_qadata *i_qadata; /* quota allocation data */
416 struct gfs2_holder i_rgd_gh;
417 struct gfs2_blkreserv i_res; /* rgrp multi-block reservation */
418 u64 i_goal; /* goal block for allocations */
419 atomic_t i_sizehint; /* hint of the write size */
420 struct rw_semaphore i_rw_mutex;
421 struct list_head i_ordered;
422 struct list_head i_trunc_list;
423 __be64 *i_hash_cache;
432 * Since i_inode is the first element of struct gfs2_inode,
433 * this is effectively a cast.
435 static inline struct gfs2_inode *GFS2_I(struct inode *inode)
437 return container_of(inode, struct gfs2_inode, i_inode);
440 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
442 return inode->i_sb->s_fs_info;
446 struct mutex f_fl_mutex;
447 struct gfs2_holder f_fl_gh;
450 struct gfs2_revoke_replay {
451 struct list_head rr_list;
453 unsigned int rr_where;
463 struct gfs2_quota_data {
464 struct hlist_bl_node qd_hlist;
465 struct list_head qd_list;
467 struct gfs2_sbd *qd_sbd;
468 struct lockref qd_lockref;
469 struct list_head qd_lru;
472 unsigned long qd_flags; /* QDF_... */
477 unsigned int qd_slot;
478 unsigned int qd_slot_count;
480 struct buffer_head *qd_bh;
481 struct gfs2_quota_change *qd_bh_qc;
482 unsigned int qd_bh_count;
484 struct gfs2_glock *qd_gl;
485 struct gfs2_quota_lvb qd_qb;
488 unsigned long qd_last_warn;
489 struct rcu_head qd_rcu;
501 unsigned int tr_blocks;
502 unsigned int tr_revokes;
503 unsigned int tr_reserved;
504 unsigned long tr_flags;
506 unsigned int tr_num_buf_new;
507 unsigned int tr_num_databuf_new;
508 unsigned int tr_num_buf_rm;
509 unsigned int tr_num_databuf_rm;
510 unsigned int tr_num_revoke;
511 unsigned int tr_num_revoke_rm;
513 struct list_head tr_list;
514 struct list_head tr_databuf;
515 struct list_head tr_buf;
517 unsigned int tr_first;
518 struct list_head tr_ail1_list;
519 struct list_head tr_ail2_list;
522 struct gfs2_journal_extent {
523 struct list_head list;
525 unsigned int lblock; /* First logical block */
526 u64 dblock; /* First disk block */
531 struct list_head jd_list;
532 struct list_head extent_list;
533 unsigned int nr_extents;
534 struct work_struct jd_work;
535 struct inode *jd_inode;
536 unsigned long jd_flags;
537 #define JDF_RECOVERY 1
539 unsigned int jd_blocks;
540 int jd_recover_error;
543 unsigned int jd_found_blocks;
544 unsigned int jd_found_revokes;
545 unsigned int jd_replayed_blocks;
547 struct list_head jd_revoke_list;
548 unsigned int jd_replay_tail;
552 struct gfs2_statfs_change_host {
558 #define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF
559 #define GFS2_QUOTA_OFF 0
560 #define GFS2_QUOTA_ACCOUNT 1
561 #define GFS2_QUOTA_ON 2
563 #define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED
564 #define GFS2_DATA_WRITEBACK 1
565 #define GFS2_DATA_ORDERED 2
567 #define GFS2_ERRORS_DEFAULT GFS2_ERRORS_WITHDRAW
568 #define GFS2_ERRORS_WITHDRAW 0
569 #define GFS2_ERRORS_CONTINUE 1 /* place holder for future feature */
570 #define GFS2_ERRORS_RO 2 /* place holder for future feature */
571 #define GFS2_ERRORS_PANIC 3
574 char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
575 char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
576 char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
577 unsigned int ar_spectator:1; /* Don't get a journal */
578 unsigned int ar_localflocks:1; /* Let the VFS do flock|fcntl */
579 unsigned int ar_debug:1; /* Oops on errors */
580 unsigned int ar_posix_acl:1; /* Enable posix acls */
581 unsigned int ar_quota:2; /* off/account/on */
582 unsigned int ar_suiddir:1; /* suiddir support */
583 unsigned int ar_data:2; /* ordered/writeback */
584 unsigned int ar_meta:1; /* mount metafs */
585 unsigned int ar_discard:1; /* discard requests */
586 unsigned int ar_errors:2; /* errors=withdraw | panic */
587 unsigned int ar_nobarrier:1; /* do not send barriers */
588 unsigned int ar_rgrplvb:1; /* use lvbs for rgrp info */
589 unsigned int ar_loccookie:1; /* use location based readdir
591 int ar_commit; /* Commit interval */
592 int ar_statfs_quantum; /* The fast statfs interval */
593 int ar_quota_quantum; /* The quota interval */
594 int ar_statfs_percent; /* The % change to force sync */
600 unsigned int gt_logd_secs;
602 unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
603 unsigned int gt_quota_scale_num; /* Numerator */
604 unsigned int gt_quota_scale_den; /* Denominator */
605 unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
606 unsigned int gt_new_files_jdata;
607 unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
608 unsigned int gt_complain_secs;
609 unsigned int gt_statfs_quantum;
610 unsigned int gt_statfs_slow;
614 SDF_JOURNAL_CHECKED = 0,
615 SDF_JOURNAL_LIVE = 1,
621 SDF_RORECOVERY = 7, /* read only recovery */
622 SDF_SKIP_DLM_UNLOCK = 8,
623 SDF_FORCE_AIL_FLUSH = 9,
624 SDF_AIL1_IO_ERROR = 10,
627 enum gfs2_freeze_state {
629 SFS_STARTING_FREEZE = 1,
633 #define GFS2_FSNAME_LEN 256
635 struct gfs2_inum_host {
640 struct gfs2_sb_host {
646 u32 sb_multihost_format;
650 struct gfs2_inum_host sb_master_dir;
651 struct gfs2_inum_host sb_root_dir;
653 char sb_lockproto[GFS2_LOCKNAME_LEN];
654 char sb_locktable[GFS2_LOCKNAME_LEN];
658 * lm_mount() return values
660 * ls_jid - the journal ID this node should use
661 * ls_first - this node is the first to mount the file system
662 * ls_lockspace - lock module's context for this file system
663 * ls_ops - lock module's functions
666 struct lm_lockstruct {
668 unsigned int ls_first;
669 const struct lm_lockops *ls_ops;
670 dlm_lockspace_t *ls_dlm;
672 int ls_recover_jid_done; /* These two are deprecated, */
673 int ls_recover_jid_status; /* used previously by gfs_controld */
675 struct dlm_lksb ls_mounted_lksb; /* mounted_lock */
676 struct dlm_lksb ls_control_lksb; /* control_lock */
677 char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */
678 struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */
681 spinlock_t ls_recover_spin; /* protects following fields */
682 unsigned long ls_recover_flags; /* DFL_ */
683 uint32_t ls_recover_mount; /* gen in first recover_done cb */
684 uint32_t ls_recover_start; /* gen in last recover_done cb */
685 uint32_t ls_recover_block; /* copy recover_start in last recover_prep */
686 uint32_t ls_recover_size; /* size of recover_submit, recover_result */
687 uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */
688 uint32_t *ls_recover_result; /* result of last jid recovery */
691 struct gfs2_pcpu_lkstats {
692 /* One struct for each glock type */
693 struct gfs2_lkstats lkstats[10];
697 struct super_block *sd_vfs;
698 struct gfs2_pcpu_lkstats __percpu *sd_lkstats;
699 struct kobject sd_kobj;
700 unsigned long sd_flags; /* SDF_... */
701 struct gfs2_sb_host sd_sb;
703 /* Constants computed on mount */
707 u32 sd_diptrs; /* Number of pointers in a dinode */
708 u32 sd_inptrs; /* Number of pointers in a indirect block */
709 u32 sd_jbsize; /* Size of a journaled data block */
710 u32 sd_hash_bsize; /* sizeof(exhash block) */
711 u32 sd_hash_bsize_shift;
712 u32 sd_hash_ptrs; /* Number of pointers in a hash block */
714 u32 sd_blocks_per_bitmap;
715 u32 sd_max_dirres; /* Max blocks needed to add a directory entry */
716 u32 sd_max_height; /* Max height of a file's metadata tree */
717 u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
718 u32 sd_max_dents_per_leaf; /* Max number of dirents in a leaf block */
720 struct gfs2_args sd_args; /* Mount arguments */
721 struct gfs2_tune sd_tune; /* Filesystem tuning structure */
725 struct lm_lockstruct sd_lockstruct;
726 struct gfs2_holder sd_live_gh;
727 struct gfs2_glock *sd_rename_gl;
728 struct gfs2_glock *sd_freeze_gl;
729 struct work_struct sd_freeze_work;
730 wait_queue_head_t sd_glock_wait;
731 atomic_t sd_glock_disposal;
732 struct completion sd_locking_init;
733 struct completion sd_wdack;
734 struct delayed_work sd_control_work;
738 struct dentry *sd_master_dir;
739 struct dentry *sd_root_dir;
741 struct inode *sd_jindex;
742 struct inode *sd_statfs_inode;
743 struct inode *sd_sc_inode;
744 struct inode *sd_qc_inode;
745 struct inode *sd_rindex;
746 struct inode *sd_quota_inode;
750 spinlock_t sd_statfs_spin;
751 struct gfs2_statfs_change_host sd_statfs_master;
752 struct gfs2_statfs_change_host sd_statfs_local;
753 int sd_statfs_force_sync;
755 /* Resource group stuff */
757 int sd_rindex_uptodate;
758 spinlock_t sd_rindex_spin;
759 struct rb_root sd_rindex_tree;
760 unsigned int sd_rgrps;
761 unsigned int sd_max_rg_data;
763 /* Journal index stuff */
765 struct list_head sd_jindex_list;
766 spinlock_t sd_jindex_spin;
767 struct mutex sd_jindex_mutex;
768 unsigned int sd_journals;
770 struct gfs2_jdesc *sd_jdesc;
771 struct gfs2_holder sd_journal_gh;
772 struct gfs2_holder sd_jinode_gh;
774 struct gfs2_holder sd_sc_gh;
775 struct gfs2_holder sd_qc_gh;
777 struct completion sd_journal_ready;
781 struct task_struct *sd_logd_process;
782 struct task_struct *sd_quotad_process;
786 struct list_head sd_quota_list;
787 atomic_t sd_quota_count;
788 struct mutex sd_quota_mutex;
789 struct mutex sd_quota_sync_mutex;
790 wait_queue_head_t sd_quota_wait;
791 struct list_head sd_trunc_list;
792 spinlock_t sd_trunc_lock;
794 unsigned int sd_quota_slots;
795 unsigned long *sd_quota_bitmap;
796 spinlock_t sd_bitmap_lock;
798 u64 sd_quota_sync_gen;
802 struct address_space sd_aspace;
804 spinlock_t sd_log_lock;
806 struct gfs2_trans *sd_log_tr;
807 unsigned int sd_log_blks_reserved;
808 int sd_log_commited_revoke;
810 atomic_t sd_log_pinned;
811 unsigned int sd_log_num_revoke;
813 struct list_head sd_log_le_revoke;
814 struct list_head sd_log_le_ordered;
815 spinlock_t sd_ordered_lock;
817 atomic_t sd_log_thresh1;
818 atomic_t sd_log_thresh2;
819 atomic_t sd_log_blks_free;
820 atomic_t sd_log_blks_needed;
821 wait_queue_head_t sd_log_waitq;
822 wait_queue_head_t sd_logd_waitq;
825 unsigned int sd_log_head;
826 unsigned int sd_log_tail;
829 struct rw_semaphore sd_log_flush_lock;
830 atomic_t sd_log_in_flight;
831 struct bio *sd_log_bio;
832 wait_queue_head_t sd_log_flush_wait;
835 atomic_t sd_reserving_log;
836 wait_queue_head_t sd_reserving_log_wait;
838 unsigned int sd_log_flush_head;
840 spinlock_t sd_ail_lock;
841 struct list_head sd_ail1_list;
842 struct list_head sd_ail2_list;
844 /* For quiescing the filesystem */
845 struct gfs2_holder sd_freeze_gh;
846 atomic_t sd_freeze_state;
847 struct mutex sd_freeze_mutex;
849 char sd_fsname[GFS2_FSNAME_LEN + 3 * sizeof(int) + 2];
850 char sd_table_name[GFS2_FSNAME_LEN];
851 char sd_proto_name[GFS2_FSNAME_LEN];
855 unsigned long sd_last_warning;
856 struct dentry *debugfs_dir; /* debugfs directory */
857 struct dentry *debugfs_dentry_glocks;
858 struct dentry *debugfs_dentry_glstats;
859 struct dentry *debugfs_dentry_sbstats;
862 static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which)
864 gl->gl_stats.stats[which]++;
867 static inline void gfs2_sbstats_inc(const struct gfs2_glock *gl, int which)
869 const struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
871 this_cpu_ptr(sdp->sd_lkstats)->lkstats[gl->gl_name.ln_type].stats[which]++;
875 extern struct gfs2_rgrpd *gfs2_glock2rgrp(struct gfs2_glock *gl);
877 static inline unsigned gfs2_max_stuffed_size(const struct gfs2_inode *ip)
879 return GFS2_SB(&ip->i_inode)->sd_sb.sb_bsize - sizeof(struct gfs2_dinode);
882 #endif /* __INCORE_DOT_H__ */