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 */
51 * Structure of operations that are associated with each
52 * type of element in the log.
55 struct gfs2_log_operations {
56 void (*lo_before_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr);
57 void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr);
58 void (*lo_before_scan) (struct gfs2_jdesc *jd,
59 struct gfs2_log_header_host *head, int pass);
60 int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start,
61 struct gfs2_log_descriptor *ld, __be64 *ptr,
63 void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass);
70 struct buffer_head *bi_bh;
72 unsigned long bi_flags;
80 struct rb_node rd_node; /* Link with superblock */
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 */
88 u32 rd_reserved; /* number of blocks reserved */
92 struct gfs2_bitmap *rd_bits;
93 struct gfs2_sbd *rd_sbd;
94 struct gfs2_rgrp_lvb *rd_rgl;
97 u32 rd_extfail_pt; /* extent failure point */
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_PREFERRED 0x80000000 /* This rgrp is preferred */
102 #define GFS2_RDF_MASK 0xf0000000 /* mask for internal flags */
103 spinlock_t rd_rsspin; /* protects reservation related vars */
104 struct rb_root rd_rstree; /* multi-block reservation tree */
108 struct gfs2_rgrpd *rgd;
109 u32 offset; /* The offset is bitmap relative */
110 int bii; /* Bitmap index */
113 static inline struct gfs2_bitmap *rbm_bi(const struct gfs2_rbm *rbm)
115 return rbm->rgd->rd_bits + rbm->bii;
118 static inline u64 gfs2_rbm_to_block(const struct gfs2_rbm *rbm)
120 return rbm->rgd->rd_data0 + (rbm_bi(rbm)->bi_start * GFS2_NBBY) +
124 static inline bool gfs2_rbm_eq(const struct gfs2_rbm *rbm1,
125 const struct gfs2_rbm *rbm2)
127 return (rbm1->rgd == rbm2->rgd) && (rbm1->bii == rbm2->bii) &&
128 (rbm1->offset == rbm2->offset);
131 enum gfs2_state_bits {
132 BH_Pinned = BH_PrivateStart,
133 BH_Escaped = BH_PrivateStart + 1,
134 BH_Zeronew = BH_PrivateStart + 2,
137 BUFFER_FNS(Pinned, pinned)
138 TAS_BUFFER_FNS(Pinned, pinned)
139 BUFFER_FNS(Escaped, escaped)
140 TAS_BUFFER_FNS(Escaped, escaped)
141 BUFFER_FNS(Zeronew, zeronew)
142 TAS_BUFFER_FNS(Zeronew, zeronew)
144 struct gfs2_bufdata {
145 struct buffer_head *bd_bh;
146 struct gfs2_glock *bd_gl;
149 struct list_head bd_list;
150 const struct gfs2_log_operations *bd_ops;
152 struct gfs2_trans *bd_tr;
153 struct list_head bd_ail_st_list;
154 struct list_head bd_ail_gl_list;
158 * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
159 * prefix of lock_dlm_ gets awkward.
162 #define GDLM_STRNAME_BYTES 25
163 #define GDLM_LVB_SIZE 32
168 * DFL_BLOCK_LOCKS: dlm is in recovery and will grant locks that had been
169 * held by failed nodes whose journals need recovery. Those locks should
170 * only be used for journal recovery until the journal recovery is done.
171 * This is set by the dlm recover_prep callback and cleared by the
172 * gfs2_control thread when journal recovery is complete. To avoid
173 * races between recover_prep setting and gfs2_control clearing, recover_spin
174 * is held while changing this bit and reading/writing recover_block
177 * DFL_NO_DLM_OPS: dlm lockspace ops/callbacks are not being used.
179 * DFL_FIRST_MOUNT: this node is the first to mount this fs and is doing
180 * recovery of all journals before allowing other nodes to mount the fs.
181 * This is cleared when FIRST_MOUNT_DONE is set.
183 * DFL_FIRST_MOUNT_DONE: this node was the first mounter, and has finished
184 * recovery of all journals, and now allows other nodes to mount the fs.
186 * DFL_MOUNT_DONE: gdlm_mount has completed successfully and cleared
187 * BLOCK_LOCKS for the first time. The gfs2_control thread should now
188 * control clearing BLOCK_LOCKS for further recoveries.
190 * DFL_UNMOUNT: gdlm_unmount sets to keep sdp off gfs2_control_wq.
192 * DFL_DLM_RECOVERY: set while dlm is in recovery, between recover_prep()
193 * and recover_done(), i.e. set while recover_block == recover_start.
200 DFL_FIRST_MOUNT_DONE = 3,
203 DFL_DLM_RECOVERY = 6,
207 struct gfs2_sbd *ln_sbd;
209 unsigned int ln_type;
212 #define lm_name_equal(name1, name2) \
213 (((name1)->ln_number == (name2)->ln_number) && \
214 ((name1)->ln_type == (name2)->ln_type) && \
215 ((name1)->ln_sbd == (name2)->ln_sbd))
218 struct gfs2_glock_operations {
219 void (*go_sync) (struct gfs2_glock *gl);
220 int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);
221 void (*go_inval) (struct gfs2_glock *gl, int flags);
222 int (*go_demote_ok) (const struct gfs2_glock *gl);
223 int (*go_lock) (struct gfs2_holder *gh);
224 void (*go_unlock) (struct gfs2_holder *gh);
225 void (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl);
226 void (*go_callback)(struct gfs2_glock *gl, bool remote);
228 const unsigned long go_flags;
229 #define GLOF_ASPACE 1
235 GFS2_LKS_SRTT = 0, /* Non blocking smoothed round trip time */
236 GFS2_LKS_SRTTVAR = 1, /* Non blocking smoothed variance */
237 GFS2_LKS_SRTTB = 2, /* Blocking smoothed round trip time */
238 GFS2_LKS_SRTTVARB = 3, /* Blocking smoothed variance */
239 GFS2_LKS_SIRT = 4, /* Smoothed Inter-request time */
240 GFS2_LKS_SIRTVAR = 5, /* Smoothed Inter-request variance */
241 GFS2_LKS_DCOUNT = 6, /* Count of dlm requests */
242 GFS2_LKS_QCOUNT = 7, /* Count of gfs2_holder queues */
246 struct gfs2_lkstats {
247 u64 stats[GFS2_NR_LKSTATS];
252 HIF_HOLDER = 6, /* Set for gh that "holds" the glock */
258 struct list_head gh_list;
260 struct gfs2_glock *gh_gl;
261 struct pid *gh_owner_pid;
266 unsigned long gh_iflags; /* HIF_... */
270 /* Number of quota types we support */
271 #define GFS2_MAXQUOTAS 2
273 struct gfs2_qadata { /* quota allocation data */
275 struct gfs2_quota_data *qa_qd[2 * GFS2_MAXQUOTAS];
276 struct gfs2_holder qa_qd_ghs[2 * GFS2_MAXQUOTAS];
277 unsigned int qa_qd_num;
280 /* Resource group multi-block reservation, in order of appearance:
282 Step 1. Function prepares to write, allocates a mb, sets the size hint.
283 Step 2. User calls inplace_reserve to target an rgrp, sets the rgrp info
284 Step 3. Function get_local_rgrp locks the rgrp, determines which bits to use
285 Step 4. Bits are assigned from the rgrp based on either the reservation
289 struct gfs2_blkreserv {
290 /* components used during write (step 1): */
291 atomic_t rs_sizehint; /* hint of the write size */
293 struct gfs2_holder rs_rgd_gh; /* Filled in by get_local_rgrp */
294 struct rb_node rs_node; /* link to other block reservations */
295 struct gfs2_rbm rs_rbm; /* Start of reservation */
296 u32 rs_free; /* how many blocks are still free */
297 u64 rs_inum; /* Inode number for reservation */
301 * Allocation parameters
302 * @target: The number of blocks we'd ideally like to allocate
303 * @aflags: The flags (e.g. Orlov flag)
305 * The intent is to gradually expand this structure over time in
306 * order to give more information, e.g. alignment, min extent size
307 * to the allocation code.
309 struct gfs2_alloc_parms {
319 GLF_PENDING_DEMOTE = 4,
320 GLF_DEMOTE_IN_PROGRESS = 5,
323 GLF_INVALIDATE_IN_PROGRESS = 8,
324 GLF_REPLY_PENDING = 9,
329 GLF_OBJECT = 14, /* Used only for tracing */
331 GLF_INODE_CREATING = 16, /* Inode creation occurring */
335 struct hlist_bl_node gl_list;
336 unsigned long gl_flags; /* GLF_... */
337 struct lm_lockname gl_name;
339 struct lockref gl_lockref;
341 /* State fields protected by gl_lockref.lock */
342 unsigned int gl_state:2, /* Current state */
343 gl_target:2, /* Target state */
344 gl_demote_state:2, /* State requested by remote node */
345 gl_req:2, /* State in last dlm request */
346 gl_reply:8; /* Last reply from the dlm */
348 unsigned long gl_demote_time; /* time of first demote request */
350 struct list_head gl_holders;
352 const struct gfs2_glock_operations *gl_ops;
354 struct gfs2_lkstats gl_stats;
355 struct dlm_lksb gl_lksb;
356 unsigned long gl_tchange;
359 struct list_head gl_lru;
360 struct list_head gl_ail_list;
361 atomic_t gl_ail_count;
363 struct delayed_work gl_work;
365 /* For inode and iopen glocks only */
366 struct work_struct gl_delete;
367 /* For rgrp glocks only */
373 struct rhash_head gl_node;
376 #define GFS2_MIN_LVB_SIZE 32 /* Min size of LVB that gfs2 supports */
381 GIF_ALLOC_FAILED = 2,
384 GIF_FREE_VFS_INODE = 5,
388 struct inode i_inode;
393 unsigned long i_flags; /* GIF_... */
394 struct gfs2_glock *i_gl; /* Move into i_gh? */
395 struct gfs2_holder i_iopen_gh;
396 struct gfs2_holder i_gh; /* for prepare/commit_write only */
397 struct gfs2_qadata *i_qadata; /* quota allocation data */
398 struct gfs2_blkreserv i_res; /* rgrp multi-block reservation */
399 struct gfs2_rgrpd *i_rgd;
400 u64 i_goal; /* goal block for allocations */
401 struct rw_semaphore i_rw_mutex;
402 struct list_head i_ordered;
403 struct list_head i_trunc_list;
404 __be64 *i_hash_cache;
413 * Since i_inode is the first element of struct gfs2_inode,
414 * this is effectively a cast.
416 static inline struct gfs2_inode *GFS2_I(struct inode *inode)
418 return container_of(inode, struct gfs2_inode, i_inode);
421 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
423 return inode->i_sb->s_fs_info;
427 struct mutex f_fl_mutex;
428 struct gfs2_holder f_fl_gh;
431 struct gfs2_revoke_replay {
432 struct list_head rr_list;
434 unsigned int rr_where;
444 struct gfs2_quota_data {
445 struct hlist_bl_node qd_hlist;
446 struct list_head qd_list;
448 struct gfs2_sbd *qd_sbd;
449 struct lockref qd_lockref;
450 struct list_head qd_lru;
453 unsigned long qd_flags; /* QDF_... */
458 unsigned int qd_slot;
459 unsigned int qd_slot_count;
461 struct buffer_head *qd_bh;
462 struct gfs2_quota_change *qd_bh_qc;
463 unsigned int qd_bh_count;
465 struct gfs2_glock *qd_gl;
466 struct gfs2_quota_lvb qd_qb;
469 unsigned long qd_last_warn;
470 struct rcu_head qd_rcu;
476 unsigned int tr_blocks;
477 unsigned int tr_revokes;
478 unsigned int tr_reserved;
479 unsigned int tr_touched:1;
480 unsigned int tr_attached:1;
481 unsigned int tr_alloced:1;
483 unsigned int tr_num_buf_new;
484 unsigned int tr_num_databuf_new;
485 unsigned int tr_num_buf_rm;
486 unsigned int tr_num_databuf_rm;
487 unsigned int tr_num_revoke;
488 unsigned int tr_num_revoke_rm;
490 struct list_head tr_list;
491 struct list_head tr_databuf;
492 struct list_head tr_buf;
494 unsigned int tr_first;
495 struct list_head tr_ail1_list;
496 struct list_head tr_ail2_list;
499 struct gfs2_journal_extent {
500 struct list_head list;
502 unsigned int lblock; /* First logical block */
503 u64 dblock; /* First disk block */
508 struct list_head jd_list;
509 struct list_head extent_list;
510 unsigned int nr_extents;
511 struct work_struct jd_work;
512 struct inode *jd_inode;
513 unsigned long jd_flags;
514 #define JDF_RECOVERY 1
516 unsigned int jd_blocks;
517 int jd_recover_error;
520 unsigned int jd_found_blocks;
521 unsigned int jd_found_revokes;
522 unsigned int jd_replayed_blocks;
524 struct list_head jd_revoke_list;
525 unsigned int jd_replay_tail;
529 struct gfs2_statfs_change_host {
535 #define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF
536 #define GFS2_QUOTA_OFF 0
537 #define GFS2_QUOTA_ACCOUNT 1
538 #define GFS2_QUOTA_ON 2
540 #define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED
541 #define GFS2_DATA_WRITEBACK 1
542 #define GFS2_DATA_ORDERED 2
544 #define GFS2_ERRORS_DEFAULT GFS2_ERRORS_WITHDRAW
545 #define GFS2_ERRORS_WITHDRAW 0
546 #define GFS2_ERRORS_CONTINUE 1 /* place holder for future feature */
547 #define GFS2_ERRORS_RO 2 /* place holder for future feature */
548 #define GFS2_ERRORS_PANIC 3
551 char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
552 char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
553 char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
554 unsigned int ar_spectator:1; /* Don't get a journal */
555 unsigned int ar_localflocks:1; /* Let the VFS do flock|fcntl */
556 unsigned int ar_debug:1; /* Oops on errors */
557 unsigned int ar_posix_acl:1; /* Enable posix acls */
558 unsigned int ar_quota:2; /* off/account/on */
559 unsigned int ar_suiddir:1; /* suiddir support */
560 unsigned int ar_data:2; /* ordered/writeback */
561 unsigned int ar_meta:1; /* mount metafs */
562 unsigned int ar_discard:1; /* discard requests */
563 unsigned int ar_errors:2; /* errors=withdraw | panic */
564 unsigned int ar_nobarrier:1; /* do not send barriers */
565 unsigned int ar_rgrplvb:1; /* use lvbs for rgrp info */
566 unsigned int ar_loccookie:1; /* use location based readdir
568 int ar_commit; /* Commit interval */
569 int ar_statfs_quantum; /* The fast statfs interval */
570 int ar_quota_quantum; /* The quota interval */
571 int ar_statfs_percent; /* The % change to force sync */
577 unsigned int gt_logd_secs;
579 unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
580 unsigned int gt_quota_scale_num; /* Numerator */
581 unsigned int gt_quota_scale_den; /* Denominator */
582 unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
583 unsigned int gt_new_files_jdata;
584 unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
585 unsigned int gt_complain_secs;
586 unsigned int gt_statfs_quantum;
587 unsigned int gt_statfs_slow;
591 SDF_JOURNAL_CHECKED = 0,
592 SDF_JOURNAL_LIVE = 1,
598 SDF_RORECOVERY = 7, /* read only recovery */
599 SDF_SKIP_DLM_UNLOCK = 8,
602 enum gfs2_freeze_state {
604 SFS_STARTING_FREEZE = 1,
608 #define GFS2_FSNAME_LEN 256
610 struct gfs2_inum_host {
615 struct gfs2_sb_host {
621 u32 sb_multihost_format;
625 struct gfs2_inum_host sb_master_dir;
626 struct gfs2_inum_host sb_root_dir;
628 char sb_lockproto[GFS2_LOCKNAME_LEN];
629 char sb_locktable[GFS2_LOCKNAME_LEN];
633 * lm_mount() return values
635 * ls_jid - the journal ID this node should use
636 * ls_first - this node is the first to mount the file system
637 * ls_lockspace - lock module's context for this file system
638 * ls_ops - lock module's functions
641 struct lm_lockstruct {
643 unsigned int ls_first;
644 const struct lm_lockops *ls_ops;
645 dlm_lockspace_t *ls_dlm;
647 int ls_recover_jid_done; /* These two are deprecated, */
648 int ls_recover_jid_status; /* used previously by gfs_controld */
650 struct dlm_lksb ls_mounted_lksb; /* mounted_lock */
651 struct dlm_lksb ls_control_lksb; /* control_lock */
652 char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */
653 struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */
656 spinlock_t ls_recover_spin; /* protects following fields */
657 unsigned long ls_recover_flags; /* DFL_ */
658 uint32_t ls_recover_mount; /* gen in first recover_done cb */
659 uint32_t ls_recover_start; /* gen in last recover_done cb */
660 uint32_t ls_recover_block; /* copy recover_start in last recover_prep */
661 uint32_t ls_recover_size; /* size of recover_submit, recover_result */
662 uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */
663 uint32_t *ls_recover_result; /* result of last jid recovery */
666 struct gfs2_pcpu_lkstats {
667 /* One struct for each glock type */
668 struct gfs2_lkstats lkstats[10];
672 struct super_block *sd_vfs;
673 struct gfs2_pcpu_lkstats __percpu *sd_lkstats;
674 struct kobject sd_kobj;
675 unsigned long sd_flags; /* SDF_... */
676 struct gfs2_sb_host sd_sb;
678 /* Constants computed on mount */
682 u32 sd_diptrs; /* Number of pointers in a dinode */
683 u32 sd_inptrs; /* Number of pointers in a indirect block */
684 u32 sd_jbsize; /* Size of a journaled data block */
685 u32 sd_hash_bsize; /* sizeof(exhash block) */
686 u32 sd_hash_bsize_shift;
687 u32 sd_hash_ptrs; /* Number of pointers in a hash block */
689 u32 sd_blocks_per_bitmap;
690 u32 sd_max_dirres; /* Max blocks needed to add a directory entry */
691 u32 sd_max_height; /* Max height of a file's metadata tree */
692 u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
693 u32 sd_max_jheight; /* Max height of journaled file's meta tree */
694 u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1];
695 u32 sd_max_dents_per_leaf; /* Max number of dirents in a leaf block */
697 struct gfs2_args sd_args; /* Mount arguments */
698 struct gfs2_tune sd_tune; /* Filesystem tuning structure */
702 struct lm_lockstruct sd_lockstruct;
703 struct gfs2_holder sd_live_gh;
704 struct gfs2_glock *sd_rename_gl;
705 struct gfs2_glock *sd_freeze_gl;
706 struct work_struct sd_freeze_work;
707 wait_queue_head_t sd_glock_wait;
708 atomic_t sd_glock_disposal;
709 struct completion sd_locking_init;
710 struct completion sd_wdack;
711 struct delayed_work sd_control_work;
715 struct dentry *sd_master_dir;
716 struct dentry *sd_root_dir;
718 struct inode *sd_jindex;
719 struct inode *sd_statfs_inode;
720 struct inode *sd_sc_inode;
721 struct inode *sd_qc_inode;
722 struct inode *sd_rindex;
723 struct inode *sd_quota_inode;
727 spinlock_t sd_statfs_spin;
728 struct gfs2_statfs_change_host sd_statfs_master;
729 struct gfs2_statfs_change_host sd_statfs_local;
730 int sd_statfs_force_sync;
732 /* Resource group stuff */
734 int sd_rindex_uptodate;
735 spinlock_t sd_rindex_spin;
736 struct rb_root sd_rindex_tree;
737 unsigned int sd_rgrps;
738 unsigned int sd_max_rg_data;
740 /* Journal index stuff */
742 struct list_head sd_jindex_list;
743 spinlock_t sd_jindex_spin;
744 struct mutex sd_jindex_mutex;
745 unsigned int sd_journals;
747 struct gfs2_jdesc *sd_jdesc;
748 struct gfs2_holder sd_journal_gh;
749 struct gfs2_holder sd_jinode_gh;
751 struct gfs2_holder sd_sc_gh;
752 struct gfs2_holder sd_qc_gh;
754 struct completion sd_journal_ready;
758 struct task_struct *sd_logd_process;
759 struct task_struct *sd_quotad_process;
763 struct list_head sd_quota_list;
764 atomic_t sd_quota_count;
765 struct mutex sd_quota_mutex;
766 struct mutex sd_quota_sync_mutex;
767 wait_queue_head_t sd_quota_wait;
768 struct list_head sd_trunc_list;
769 spinlock_t sd_trunc_lock;
771 unsigned int sd_quota_slots;
772 unsigned long *sd_quota_bitmap;
773 spinlock_t sd_bitmap_lock;
775 u64 sd_quota_sync_gen;
779 struct address_space sd_aspace;
781 spinlock_t sd_log_lock;
783 struct gfs2_trans *sd_log_tr;
784 unsigned int sd_log_blks_reserved;
785 int sd_log_commited_revoke;
787 atomic_t sd_log_pinned;
788 unsigned int sd_log_num_revoke;
790 struct list_head sd_log_le_revoke;
791 struct list_head sd_log_le_ordered;
792 spinlock_t sd_ordered_lock;
794 atomic_t sd_log_thresh1;
795 atomic_t sd_log_thresh2;
796 atomic_t sd_log_blks_free;
797 wait_queue_head_t sd_log_waitq;
798 wait_queue_head_t sd_logd_waitq;
801 unsigned int sd_log_head;
802 unsigned int sd_log_tail;
805 struct rw_semaphore sd_log_flush_lock;
806 atomic_t sd_log_in_flight;
807 struct bio *sd_log_bio;
808 wait_queue_head_t sd_log_flush_wait;
811 atomic_t sd_reserving_log;
812 wait_queue_head_t sd_reserving_log_wait;
814 unsigned int sd_log_flush_head;
815 u64 sd_log_flush_wrapped;
817 spinlock_t sd_ail_lock;
818 struct list_head sd_ail1_list;
819 struct list_head sd_ail2_list;
821 /* For quiescing the filesystem */
822 struct gfs2_holder sd_freeze_gh;
823 atomic_t sd_freeze_state;
824 struct mutex sd_freeze_mutex;
826 char sd_fsname[GFS2_FSNAME_LEN];
827 char sd_table_name[GFS2_FSNAME_LEN];
828 char sd_proto_name[GFS2_FSNAME_LEN];
832 unsigned long sd_last_warning;
833 struct dentry *debugfs_dir; /* debugfs directory */
834 struct dentry *debugfs_dentry_glocks;
835 struct dentry *debugfs_dentry_glstats;
836 struct dentry *debugfs_dentry_sbstats;
839 static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which)
841 gl->gl_stats.stats[which]++;
844 static inline void gfs2_sbstats_inc(const struct gfs2_glock *gl, int which)
846 const struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
848 this_cpu_ptr(sdp->sd_lkstats)->lkstats[gl->gl_name.ln_type].stats[which]++;
852 #endif /* __INCORE_DOT_H__ */