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 struct buffer_head *bi_bh;
71 unsigned long bi_flags;
79 struct rb_node rd_node; /* Link with superblock */
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 */
87 u32 rd_reserved; /* number of blocks reserved */
91 struct gfs2_bitmap *rd_bits;
92 struct gfs2_sbd *rd_sbd;
93 struct gfs2_rgrp_lvb *rd_rgl;
96 u32 rd_extfail_pt; /* extent failure point */
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_PREFERRED 0x80000000 /* This rgrp is preferred */
101 #define GFS2_RDF_MASK 0xf0000000 /* mask for internal flags */
102 spinlock_t rd_rsspin; /* protects reservation related vars */
103 struct rb_root rd_rstree; /* multi-block reservation tree */
107 struct gfs2_rgrpd *rgd;
108 u32 offset; /* The offset is bitmap relative */
109 int bii; /* Bitmap index */
112 static inline struct gfs2_bitmap *rbm_bi(const struct gfs2_rbm *rbm)
114 return rbm->rgd->rd_bits + rbm->bii;
117 static inline u64 gfs2_rbm_to_block(const struct gfs2_rbm *rbm)
119 BUG_ON(rbm->offset >= rbm->rgd->rd_data);
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,
136 BUFFER_FNS(Pinned, pinned)
137 TAS_BUFFER_FNS(Pinned, pinned)
138 BUFFER_FNS(Escaped, escaped)
139 TAS_BUFFER_FNS(Escaped, escaped)
141 struct gfs2_bufdata {
142 struct buffer_head *bd_bh;
143 struct gfs2_glock *bd_gl;
146 struct list_head bd_list;
147 const struct gfs2_log_operations *bd_ops;
149 struct gfs2_trans *bd_tr;
150 struct list_head bd_ail_st_list;
151 struct list_head bd_ail_gl_list;
155 * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
156 * prefix of lock_dlm_ gets awkward.
159 #define GDLM_STRNAME_BYTES 25
160 #define GDLM_LVB_SIZE 32
165 * DFL_BLOCK_LOCKS: dlm is in recovery and will grant locks that had been
166 * held by failed nodes whose journals need recovery. Those locks should
167 * only be used for journal recovery until the journal recovery is done.
168 * This is set by the dlm recover_prep callback and cleared by the
169 * gfs2_control thread when journal recovery is complete. To avoid
170 * races between recover_prep setting and gfs2_control clearing, recover_spin
171 * is held while changing this bit and reading/writing recover_block
174 * DFL_NO_DLM_OPS: dlm lockspace ops/callbacks are not being used.
176 * DFL_FIRST_MOUNT: this node is the first to mount this fs and is doing
177 * recovery of all journals before allowing other nodes to mount the fs.
178 * This is cleared when FIRST_MOUNT_DONE is set.
180 * DFL_FIRST_MOUNT_DONE: this node was the first mounter, and has finished
181 * recovery of all journals, and now allows other nodes to mount the fs.
183 * DFL_MOUNT_DONE: gdlm_mount has completed successfully and cleared
184 * BLOCK_LOCKS for the first time. The gfs2_control thread should now
185 * control clearing BLOCK_LOCKS for further recoveries.
187 * DFL_UNMOUNT: gdlm_unmount sets to keep sdp off gfs2_control_wq.
189 * DFL_DLM_RECOVERY: set while dlm is in recovery, between recover_prep()
190 * and recover_done(), i.e. set while recover_block == recover_start.
197 DFL_FIRST_MOUNT_DONE = 3,
200 DFL_DLM_RECOVERY = 6,
204 * We are using struct lm_lockname as an rhashtable key. Avoid holes within
205 * the struct; padding at the end is fine.
209 struct gfs2_sbd *ln_sbd;
210 unsigned int ln_type;
213 #define lm_name_equal(name1, name2) \
214 (((name1)->ln_number == (name2)->ln_number) && \
215 ((name1)->ln_type == (name2)->ln_type) && \
216 ((name1)->ln_sbd == (name2)->ln_sbd))
219 struct gfs2_glock_operations {
220 void (*go_sync) (struct gfs2_glock *gl);
221 int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);
222 void (*go_inval) (struct gfs2_glock *gl, int flags);
223 int (*go_demote_ok) (const struct gfs2_glock *gl);
224 int (*go_lock) (struct gfs2_holder *gh);
225 void (*go_unlock) (struct gfs2_holder *gh);
226 void (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl);
227 void (*go_callback)(struct gfs2_glock *gl, bool remote);
229 const unsigned long go_flags;
230 #define GLOF_ASPACE 1
236 GFS2_LKS_SRTT = 0, /* Non blocking smoothed round trip time */
237 GFS2_LKS_SRTTVAR = 1, /* Non blocking smoothed variance */
238 GFS2_LKS_SRTTB = 2, /* Blocking smoothed round trip time */
239 GFS2_LKS_SRTTVARB = 3, /* Blocking smoothed variance */
240 GFS2_LKS_SIRT = 4, /* Smoothed Inter-request time */
241 GFS2_LKS_SIRTVAR = 5, /* Smoothed Inter-request variance */
242 GFS2_LKS_DCOUNT = 6, /* Count of dlm requests */
243 GFS2_LKS_QCOUNT = 7, /* Count of gfs2_holder queues */
247 struct gfs2_lkstats {
248 u64 stats[GFS2_NR_LKSTATS];
253 HIF_HOLDER = 6, /* Set for gh that "holds" the glock */
259 struct list_head gh_list;
261 struct gfs2_glock *gh_gl;
262 struct pid *gh_owner_pid;
267 unsigned long gh_iflags; /* HIF_... */
271 /* Number of quota types we support */
272 #define GFS2_MAXQUOTAS 2
274 struct gfs2_qadata { /* quota allocation data */
276 struct gfs2_quota_data *qa_qd[2 * GFS2_MAXQUOTAS];
277 struct gfs2_holder qa_qd_ghs[2 * GFS2_MAXQUOTAS];
278 unsigned int qa_qd_num;
281 /* Resource group multi-block reservation, in order of appearance:
283 Step 1. Function prepares to write, allocates a mb, sets the size hint.
284 Step 2. User calls inplace_reserve to target an rgrp, sets the rgrp info
285 Step 3. Function get_local_rgrp locks the rgrp, determines which bits to use
286 Step 4. Bits are assigned from the rgrp based on either the reservation
290 struct gfs2_blkreserv {
291 /* components used during write (step 1): */
292 atomic_t rs_sizehint; /* hint of the write size */
294 struct gfs2_holder rs_rgd_gh; /* Filled in by get_local_rgrp */
295 struct rb_node rs_node; /* link to other block reservations */
296 struct gfs2_rbm rs_rbm; /* Start of reservation */
297 u32 rs_free; /* how many blocks are still free */
298 u64 rs_inum; /* Inode number for reservation */
302 * Allocation parameters
303 * @target: The number of blocks we'd ideally like to allocate
304 * @aflags: The flags (e.g. Orlov flag)
306 * The intent is to gradually expand this structure over time in
307 * order to give more information, e.g. alignment, min extent size
308 * to the allocation code.
310 struct gfs2_alloc_parms {
320 GLF_PENDING_DEMOTE = 4,
321 GLF_DEMOTE_IN_PROGRESS = 5,
324 GLF_INVALIDATE_IN_PROGRESS = 8,
325 GLF_REPLY_PENDING = 9,
330 GLF_OBJECT = 14, /* Used only for tracing */
332 GLF_INODE_CREATING = 16, /* Inode creation occurring */
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 rcu_head gl_rcu;
374 struct rhash_head gl_node;
377 #define GFS2_MIN_LVB_SIZE 32 /* Min size of LVB that gfs2 supports */
382 GIF_ALLOC_FAILED = 2,
385 GIF_FREE_VFS_INODE = 5,
386 GIF_GLOP_PENDING = 6,
390 struct inode i_inode;
395 unsigned long i_flags; /* GIF_... */
396 struct gfs2_glock *i_gl; /* Move into i_gh? */
397 struct gfs2_holder i_iopen_gh;
398 struct gfs2_holder i_gh; /* for prepare/commit_write only */
399 struct gfs2_qadata *i_qadata; /* quota allocation data */
400 struct gfs2_blkreserv i_res; /* rgrp multi-block reservation */
401 struct gfs2_rgrpd *i_rgd;
402 u64 i_goal; /* goal block for allocations */
403 struct rw_semaphore i_rw_mutex;
404 struct list_head i_ordered;
405 struct list_head i_trunc_list;
406 __be64 *i_hash_cache;
415 * Since i_inode is the first element of struct gfs2_inode,
416 * this is effectively a cast.
418 static inline struct gfs2_inode *GFS2_I(struct inode *inode)
420 return container_of(inode, struct gfs2_inode, i_inode);
423 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
425 return inode->i_sb->s_fs_info;
429 struct mutex f_fl_mutex;
430 struct gfs2_holder f_fl_gh;
433 struct gfs2_revoke_replay {
434 struct list_head rr_list;
436 unsigned int rr_where;
446 struct gfs2_quota_data {
447 struct hlist_bl_node qd_hlist;
448 struct list_head qd_list;
450 struct gfs2_sbd *qd_sbd;
451 struct lockref qd_lockref;
452 struct list_head qd_lru;
455 unsigned long qd_flags; /* QDF_... */
460 unsigned int qd_slot;
461 unsigned int qd_slot_count;
463 struct buffer_head *qd_bh;
464 struct gfs2_quota_change *qd_bh_qc;
465 unsigned int qd_bh_count;
467 struct gfs2_glock *qd_gl;
468 struct gfs2_quota_lvb qd_qb;
471 unsigned long qd_last_warn;
472 struct rcu_head qd_rcu;
484 unsigned int tr_blocks;
485 unsigned int tr_revokes;
486 unsigned int tr_reserved;
487 unsigned long tr_flags;
489 unsigned int tr_num_buf_new;
490 unsigned int tr_num_databuf_new;
491 unsigned int tr_num_buf_rm;
492 unsigned int tr_num_databuf_rm;
493 unsigned int tr_num_revoke;
494 unsigned int tr_num_revoke_rm;
496 struct list_head tr_list;
497 struct list_head tr_databuf;
498 struct list_head tr_buf;
500 unsigned int tr_first;
501 struct list_head tr_ail1_list;
502 struct list_head tr_ail2_list;
505 struct gfs2_journal_extent {
506 struct list_head list;
508 unsigned int lblock; /* First logical block */
509 u64 dblock; /* First disk block */
514 struct list_head jd_list;
515 struct list_head extent_list;
516 unsigned int nr_extents;
517 struct work_struct jd_work;
518 struct inode *jd_inode;
519 unsigned long jd_flags;
520 #define JDF_RECOVERY 1
522 unsigned int jd_blocks;
523 int jd_recover_error;
526 unsigned int jd_found_blocks;
527 unsigned int jd_found_revokes;
528 unsigned int jd_replayed_blocks;
530 struct list_head jd_revoke_list;
531 unsigned int jd_replay_tail;
535 struct gfs2_statfs_change_host {
541 #define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF
542 #define GFS2_QUOTA_OFF 0
543 #define GFS2_QUOTA_ACCOUNT 1
544 #define GFS2_QUOTA_ON 2
546 #define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED
547 #define GFS2_DATA_WRITEBACK 1
548 #define GFS2_DATA_ORDERED 2
550 #define GFS2_ERRORS_DEFAULT GFS2_ERRORS_WITHDRAW
551 #define GFS2_ERRORS_WITHDRAW 0
552 #define GFS2_ERRORS_CONTINUE 1 /* place holder for future feature */
553 #define GFS2_ERRORS_RO 2 /* place holder for future feature */
554 #define GFS2_ERRORS_PANIC 3
557 char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
558 char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
559 char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
560 unsigned int ar_spectator:1; /* Don't get a journal */
561 unsigned int ar_localflocks:1; /* Let the VFS do flock|fcntl */
562 unsigned int ar_debug:1; /* Oops on errors */
563 unsigned int ar_posix_acl:1; /* Enable posix acls */
564 unsigned int ar_quota:2; /* off/account/on */
565 unsigned int ar_suiddir:1; /* suiddir support */
566 unsigned int ar_data:2; /* ordered/writeback */
567 unsigned int ar_meta:1; /* mount metafs */
568 unsigned int ar_discard:1; /* discard requests */
569 unsigned int ar_errors:2; /* errors=withdraw | panic */
570 unsigned int ar_nobarrier:1; /* do not send barriers */
571 unsigned int ar_rgrplvb:1; /* use lvbs for rgrp info */
572 unsigned int ar_loccookie:1; /* use location based readdir
574 int ar_commit; /* Commit interval */
575 int ar_statfs_quantum; /* The fast statfs interval */
576 int ar_quota_quantum; /* The quota interval */
577 int ar_statfs_percent; /* The % change to force sync */
583 unsigned int gt_logd_secs;
585 unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
586 unsigned int gt_quota_scale_num; /* Numerator */
587 unsigned int gt_quota_scale_den; /* Denominator */
588 unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
589 unsigned int gt_new_files_jdata;
590 unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
591 unsigned int gt_complain_secs;
592 unsigned int gt_statfs_quantum;
593 unsigned int gt_statfs_slow;
597 SDF_JOURNAL_CHECKED = 0,
598 SDF_JOURNAL_LIVE = 1,
604 SDF_RORECOVERY = 7, /* read only recovery */
605 SDF_SKIP_DLM_UNLOCK = 8,
606 SDF_FORCE_AIL_FLUSH = 9,
609 enum gfs2_freeze_state {
611 SFS_STARTING_FREEZE = 1,
615 #define GFS2_FSNAME_LEN 256
617 struct gfs2_inum_host {
622 struct gfs2_sb_host {
628 u32 sb_multihost_format;
632 struct gfs2_inum_host sb_master_dir;
633 struct gfs2_inum_host sb_root_dir;
635 char sb_lockproto[GFS2_LOCKNAME_LEN];
636 char sb_locktable[GFS2_LOCKNAME_LEN];
640 * lm_mount() return values
642 * ls_jid - the journal ID this node should use
643 * ls_first - this node is the first to mount the file system
644 * ls_lockspace - lock module's context for this file system
645 * ls_ops - lock module's functions
648 struct lm_lockstruct {
650 unsigned int ls_first;
651 const struct lm_lockops *ls_ops;
652 dlm_lockspace_t *ls_dlm;
654 int ls_recover_jid_done; /* These two are deprecated, */
655 int ls_recover_jid_status; /* used previously by gfs_controld */
657 struct dlm_lksb ls_mounted_lksb; /* mounted_lock */
658 struct dlm_lksb ls_control_lksb; /* control_lock */
659 char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */
660 struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */
663 spinlock_t ls_recover_spin; /* protects following fields */
664 unsigned long ls_recover_flags; /* DFL_ */
665 uint32_t ls_recover_mount; /* gen in first recover_done cb */
666 uint32_t ls_recover_start; /* gen in last recover_done cb */
667 uint32_t ls_recover_block; /* copy recover_start in last recover_prep */
668 uint32_t ls_recover_size; /* size of recover_submit, recover_result */
669 uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */
670 uint32_t *ls_recover_result; /* result of last jid recovery */
673 struct gfs2_pcpu_lkstats {
674 /* One struct for each glock type */
675 struct gfs2_lkstats lkstats[10];
679 struct super_block *sd_vfs;
680 struct gfs2_pcpu_lkstats __percpu *sd_lkstats;
681 struct kobject sd_kobj;
682 unsigned long sd_flags; /* SDF_... */
683 struct gfs2_sb_host sd_sb;
685 /* Constants computed on mount */
689 u32 sd_diptrs; /* Number of pointers in a dinode */
690 u32 sd_inptrs; /* Number of pointers in a indirect block */
691 u32 sd_jbsize; /* Size of a journaled data block */
692 u32 sd_hash_bsize; /* sizeof(exhash block) */
693 u32 sd_hash_bsize_shift;
694 u32 sd_hash_ptrs; /* Number of pointers in a hash block */
696 u32 sd_blocks_per_bitmap;
697 u32 sd_max_dirres; /* Max blocks needed to add a directory entry */
698 u32 sd_max_height; /* Max height of a file's metadata tree */
699 u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
700 u32 sd_max_dents_per_leaf; /* Max number of dirents in a leaf block */
702 struct gfs2_args sd_args; /* Mount arguments */
703 struct gfs2_tune sd_tune; /* Filesystem tuning structure */
707 struct lm_lockstruct sd_lockstruct;
708 struct gfs2_holder sd_live_gh;
709 struct gfs2_glock *sd_rename_gl;
710 struct gfs2_glock *sd_freeze_gl;
711 struct work_struct sd_freeze_work;
712 wait_queue_head_t sd_glock_wait;
713 atomic_t sd_glock_disposal;
714 struct completion sd_locking_init;
715 struct completion sd_wdack;
716 struct delayed_work sd_control_work;
720 struct dentry *sd_master_dir;
721 struct dentry *sd_root_dir;
723 struct inode *sd_jindex;
724 struct inode *sd_statfs_inode;
725 struct inode *sd_sc_inode;
726 struct inode *sd_qc_inode;
727 struct inode *sd_rindex;
728 struct inode *sd_quota_inode;
732 spinlock_t sd_statfs_spin;
733 struct gfs2_statfs_change_host sd_statfs_master;
734 struct gfs2_statfs_change_host sd_statfs_local;
735 int sd_statfs_force_sync;
737 /* Resource group stuff */
739 int sd_rindex_uptodate;
740 spinlock_t sd_rindex_spin;
741 struct rb_root sd_rindex_tree;
742 unsigned int sd_rgrps;
743 unsigned int sd_max_rg_data;
745 /* Journal index stuff */
747 struct list_head sd_jindex_list;
748 spinlock_t sd_jindex_spin;
749 struct mutex sd_jindex_mutex;
750 unsigned int sd_journals;
752 struct gfs2_jdesc *sd_jdesc;
753 struct gfs2_holder sd_journal_gh;
754 struct gfs2_holder sd_jinode_gh;
756 struct gfs2_holder sd_sc_gh;
757 struct gfs2_holder sd_qc_gh;
759 struct completion sd_journal_ready;
763 struct task_struct *sd_logd_process;
764 struct task_struct *sd_quotad_process;
768 struct list_head sd_quota_list;
769 atomic_t sd_quota_count;
770 struct mutex sd_quota_mutex;
771 struct mutex sd_quota_sync_mutex;
772 wait_queue_head_t sd_quota_wait;
773 struct list_head sd_trunc_list;
774 spinlock_t sd_trunc_lock;
776 unsigned int sd_quota_slots;
777 unsigned long *sd_quota_bitmap;
778 spinlock_t sd_bitmap_lock;
780 u64 sd_quota_sync_gen;
784 struct address_space sd_aspace;
786 spinlock_t sd_log_lock;
788 struct gfs2_trans *sd_log_tr;
789 unsigned int sd_log_blks_reserved;
790 int sd_log_commited_revoke;
792 atomic_t sd_log_pinned;
793 unsigned int sd_log_num_revoke;
795 struct list_head sd_log_le_revoke;
796 struct list_head sd_log_le_ordered;
797 spinlock_t sd_ordered_lock;
799 atomic_t sd_log_thresh1;
800 atomic_t sd_log_thresh2;
801 atomic_t sd_log_blks_free;
802 atomic_t sd_log_blks_needed;
803 wait_queue_head_t sd_log_waitq;
804 wait_queue_head_t sd_logd_waitq;
807 unsigned int sd_log_head;
808 unsigned int sd_log_tail;
811 struct rw_semaphore sd_log_flush_lock;
812 atomic_t sd_log_in_flight;
813 struct bio *sd_log_bio;
814 wait_queue_head_t sd_log_flush_wait;
817 atomic_t sd_reserving_log;
818 wait_queue_head_t sd_reserving_log_wait;
820 unsigned int sd_log_flush_head;
822 spinlock_t sd_ail_lock;
823 struct list_head sd_ail1_list;
824 struct list_head sd_ail2_list;
826 /* For quiescing the filesystem */
827 struct gfs2_holder sd_freeze_gh;
828 atomic_t sd_freeze_state;
829 struct mutex sd_freeze_mutex;
831 char sd_fsname[GFS2_FSNAME_LEN + 3 * sizeof(int) + 2];
832 char sd_table_name[GFS2_FSNAME_LEN];
833 char sd_proto_name[GFS2_FSNAME_LEN];
837 unsigned long sd_last_warning;
838 struct dentry *debugfs_dir; /* debugfs directory */
839 struct dentry *debugfs_dentry_glocks;
840 struct dentry *debugfs_dentry_glstats;
841 struct dentry *debugfs_dentry_sbstats;
844 static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which)
846 gl->gl_stats.stats[which]++;
849 static inline void gfs2_sbstats_inc(const struct gfs2_glock *gl, int which)
851 const struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
853 this_cpu_ptr(sdp->sd_lkstats)->lkstats[gl->gl_name.ln_type].stats[which]++;
857 extern struct gfs2_rgrpd *gfs2_glock2rgrp(struct gfs2_glock *gl);
859 static inline unsigned gfs2_max_stuffed_size(const struct gfs2_inode *ip)
861 return GFS2_SB(&ip->i_inode)->sd_sb.sb_bsize - sizeof(struct gfs2_dinode);
864 #endif /* __INCORE_DOT_H__ */