incore.h

  1/* SPDX-License-Identifier: GPL-2.0-only */
  2/*
  3 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  4 * Copyright (C) 2004-2008 Red Hat, Inc.  All rights reserved.
  5 */
  6
  7#ifndef __INCORE_DOT_H__
  8#define __INCORE_DOT_H__
  9
 10#include <linux/fs.h>
 11#include <linux/kobject.h>
 12#include <linux/workqueue.h>
 13#include <linux/dlm.h>
 14#include <linux/buffer_head.h>
 15#include <linux/rcupdate.h>
 16#include <linux/rculist_bl.h>
 17#include <linux/completion.h>
 18#include <linux/rbtree.h>
 19#include <linux/ktime.h>
 20#include <linux/percpu.h>
 21#include <linux/lockref.h>
 22#include <linux/rhashtable.h>
 23#include <linux/mutex.h>
 24
 25#define DIO_WAIT	0x00000010
 26#define DIO_METADATA	0x00000020
 27
 28struct gfs2_log_operations;
 29struct gfs2_bufdata;
 30struct gfs2_holder;
 31struct gfs2_glock;
 32struct gfs2_quota_data;
 33struct gfs2_trans;
 34struct gfs2_jdesc;
 35struct gfs2_sbd;
 36struct lm_lockops;
 37
 38typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
 39
 40struct gfs2_log_header_host {
 41	u64 lh_sequence;	/* Sequence number of this transaction */
 42	u32 lh_flags;		/* GFS2_LOG_HEAD_... */
 43	u32 lh_tail;		/* Block number of log tail */
 44	u32 lh_blkno;
 45
 46	s64 lh_local_total;
 47	s64 lh_local_free;
 48	s64 lh_local_dinodes;
 49};
 50
 51/*
 52 * Structure of operations that are associated with each
 53 * type of element in the log.
 54 */
 55
 56struct gfs2_log_operations {
 57	void (*lo_before_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr);
 58	void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr);
 59	void (*lo_before_scan) (struct gfs2_jdesc *jd,
 60				struct gfs2_log_header_host *head, int pass);
 61	int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start,
 62				 struct gfs2_log_descriptor *ld, __be64 *ptr,
 63				 int pass);
 64	void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass);
 65	const char *lo_name;
 66};
 67
 68#define GBF_FULL 1
 69
 70/**
 71 * Clone bitmaps (bi_clone):
 72 *
 73 * - When a block is freed, we remember the previous state of the block in the
 74 *   clone bitmap, and only mark the block as free in the real bitmap.
 75 *
 76 * - When looking for a block to allocate, we check for a free block in the
 77 *   clone bitmap, and if no clone bitmap exists, in the real bitmap.
 78 *
 79 * - For allocating a block, we mark it as allocated in the real bitmap, and if
 80 *   a clone bitmap exists, also in the clone bitmap.
 81 *
 82 * - At the end of a log_flush, we copy the real bitmap into the clone bitmap
 83 *   to make the clone bitmap reflect the current allocation state.
 84 *   (Alternatively, we could remove the clone bitmap.)
 85 *
 86 * The clone bitmaps are in-core only, and is never written to disk.
 87 *
 88 * These steps ensure that blocks which have been freed in a transaction cannot
 89 * be reallocated in that same transaction.
 90 */
 91struct gfs2_bitmap {
 92	struct buffer_head *bi_bh;
 93	char *bi_clone;
 94	unsigned long bi_flags;
 95	u32 bi_offset;
 96	u32 bi_start;
 97	u32 bi_bytes;
 98	u32 bi_blocks;
 99};
100
101struct gfs2_rgrpd {
102	struct rb_node rd_node;		/* Link with superblock */
103	struct gfs2_glock *rd_gl;	/* Glock for this rgrp */
104	u64 rd_addr;			/* grp block disk address */
105	u64 rd_data0;			/* first data location */
106	u32 rd_length;			/* length of rgrp header in fs blocks */
107	u32 rd_data;			/* num of data blocks in rgrp */
108	u32 rd_bitbytes;		/* number of bytes in data bitmaps */
109	u32 rd_free;
110	u32 rd_requested;		/* number of blocks in rd_rstree */
111	u32 rd_reserved;		/* number of reserved blocks */
112	u32 rd_free_clone;
113	u32 rd_dinodes;
114	u64 rd_igeneration;
115	struct gfs2_bitmap *rd_bits;
116	struct gfs2_sbd *rd_sbd;
117	struct gfs2_rgrp_lvb *rd_rgl;
118	u32 rd_last_alloc;
119	u32 rd_flags;
120	u32 rd_extfail_pt;		/* extent failure point */
121#define GFS2_RDF_CHECK		0x10000000 /* check for unlinked inodes */
122#define GFS2_RDF_ERROR		0x40000000 /* error in rg */
123#define GFS2_RDF_PREFERRED	0x80000000 /* This rgrp is preferred */
124#define GFS2_RDF_MASK		0xf0000000 /* mask for internal flags */
125	spinlock_t rd_rsspin;           /* protects reservation related vars */
126	struct mutex rd_mutex;
127	struct rb_root rd_rstree;       /* multi-block reservation tree */
128};
129
130enum gfs2_state_bits {
131	BH_Pinned = BH_PrivateStart,
132	BH_Escaped = BH_PrivateStart + 1,
133};
134
135BUFFER_FNS(Pinned, pinned)
136TAS_BUFFER_FNS(Pinned, pinned)
137BUFFER_FNS(Escaped, escaped)
138TAS_BUFFER_FNS(Escaped, escaped)
139
140struct gfs2_bufdata {
141	struct buffer_head *bd_bh;
142	struct gfs2_glock *bd_gl;
143	u64 bd_blkno;
144
145	struct list_head bd_list;
146
147	struct gfs2_trans *bd_tr;
148	struct list_head bd_ail_st_list;
149	struct list_head bd_ail_gl_list;
150};
151
152/*
153 * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
154 * prefix of lock_dlm_ gets awkward.
155 */
156
157#define GDLM_STRNAME_BYTES	25
158#define GDLM_LVB_SIZE		32
159
160/*
161 * ls_recover_flags:
162 *
163 * DFL_BLOCK_LOCKS: dlm is in recovery and will grant locks that had been
164 * held by failed nodes whose journals need recovery.  Those locks should
165 * only be used for journal recovery until the journal recovery is done.
166 * This is set by the dlm recover_prep callback and cleared by the
167 * gfs2_control thread when journal recovery is complete.  To avoid
168 * races between recover_prep setting and gfs2_control clearing, recover_spin
169 * is held while changing this bit and reading/writing recover_block
170 * and recover_start.
171 *
172 * DFL_NO_DLM_OPS: dlm lockspace ops/callbacks are not being used.
173 *
174 * DFL_FIRST_MOUNT: this node is the first to mount this fs and is doing
175 * recovery of all journals before allowing other nodes to mount the fs.
176 * This is cleared when FIRST_MOUNT_DONE is set.
177 *
178 * DFL_FIRST_MOUNT_DONE: this node was the first mounter, and has finished
179 * recovery of all journals, and now allows other nodes to mount the fs.
180 *
181 * DFL_MOUNT_DONE: gdlm_mount has completed successfully and cleared
182 * BLOCK_LOCKS for the first time.  The gfs2_control thread should now
183 * control clearing BLOCK_LOCKS for further recoveries.
184 *
185 * DFL_UNMOUNT: gdlm_unmount sets to keep sdp off gfs2_control_wq.
186 *
187 * DFL_DLM_RECOVERY: set while dlm is in recovery, between recover_prep()
188 * and recover_done(), i.e. set while recover_block == recover_start.
189 */
190
191enum {
192	DFL_BLOCK_LOCKS		= 0,
193	DFL_NO_DLM_OPS		= 1,
194	DFL_FIRST_MOUNT		= 2,
195	DFL_FIRST_MOUNT_DONE	= 3,
196	DFL_MOUNT_DONE		= 4,
197	DFL_UNMOUNT		= 5,
198	DFL_DLM_RECOVERY	= 6,
199};
200
201/*
202 * We are using struct lm_lockname as an rhashtable key.  Avoid holes within
203 * the struct; padding at the end is fine.
204 */
205struct lm_lockname {
206	u64 ln_number;
207	struct gfs2_sbd *ln_sbd;
208	unsigned int ln_type;
209};
210
211#define lm_name_equal(name1, name2) \
212        (((name1)->ln_number == (name2)->ln_number) &&	\
213	 ((name1)->ln_type == (name2)->ln_type) &&	\
214	 ((name1)->ln_sbd == (name2)->ln_sbd))
215
216
217struct gfs2_glock_operations {
218	int (*go_sync) (struct gfs2_glock *gl);
219	int (*go_xmote_bh)(struct gfs2_glock *gl);
220	void (*go_inval) (struct gfs2_glock *gl, int flags);
221	int (*go_instantiate) (struct gfs2_glock *gl);
222	int (*go_held)(struct gfs2_holder *gh);
223	void (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl,
224			const char *fs_id_buf);
225	void (*go_callback)(struct gfs2_glock *gl, bool remote);
226	const int go_subclass;
227	const int go_type;
228	const unsigned long go_flags;
229#define GLOF_ASPACE 1 /* address space attached */
230#define GLOF_LVB    2 /* Lock Value Block attached */
231};
232
233enum {
234	GFS2_LKS_SRTT = 0,	/* Non blocking smoothed round trip time */
235	GFS2_LKS_SRTTVAR = 1,	/* Non blocking smoothed variance */
236	GFS2_LKS_SRTTB = 2,	/* Blocking smoothed round trip time */
237	GFS2_LKS_SRTTVARB = 3,	/* Blocking smoothed variance */
238	GFS2_LKS_SIRT = 4,	/* Smoothed Inter-request time */
239	GFS2_LKS_SIRTVAR = 5,	/* Smoothed Inter-request variance */
240	GFS2_LKS_DCOUNT = 6,	/* Count of dlm requests */
241	GFS2_LKS_QCOUNT = 7,	/* Count of gfs2_holder queues */
242	GFS2_NR_LKSTATS
243};
244
245struct gfs2_lkstats {
246	u64 stats[GFS2_NR_LKSTATS];
247};
248
249enum {
250	/* States */
251	HIF_HOLDER		= 6,  /* Set for gh that "holds" the glock */
252	HIF_WAIT		= 10,
253};
254
255struct gfs2_holder {
256	struct list_head gh_list;
257
258	struct gfs2_glock *gh_gl;
259	struct pid *gh_owner_pid;
260	u16 gh_flags;
261	u16 gh_state;
262
263	int gh_error;
264	unsigned long gh_iflags; /* HIF_... */
265	unsigned long gh_ip;
266};
267
268/* Number of quota types we support */
269#define GFS2_MAXQUOTAS 2
270
271struct gfs2_qadata { /* quota allocation data */
272	/* Quota stuff */
273	struct gfs2_quota_data *qa_qd[2 * GFS2_MAXQUOTAS];
274	struct gfs2_holder qa_qd_ghs[2 * GFS2_MAXQUOTAS];
275	unsigned int qa_qd_num;
276	int qa_ref;
277};
278
279/* Resource group multi-block reservation, in order of appearance:
280
281   Step 1. Function prepares to write, allocates a mb, sets the size hint.
282   Step 2. User calls inplace_reserve to target an rgrp, sets the rgrp info
283   Step 3. Function get_local_rgrp locks the rgrp, determines which bits to use
284   Step 4. Bits are assigned from the rgrp based on either the reservation
285           or wherever it can.
286*/
287
288struct gfs2_blkreserv {
289	struct rb_node rs_node;       /* node within rd_rstree */
290	struct gfs2_rgrpd *rs_rgd;
291	u64 rs_start;
292	u32 rs_requested;
293	u32 rs_reserved;              /* number of reserved blocks */
294};
295
296/*
297 * Allocation parameters
298 * @target: The number of blocks we'd ideally like to allocate
299 * @aflags: The flags (e.g. Orlov flag)
300 *
301 * The intent is to gradually expand this structure over time in
302 * order to give more information, e.g. alignment, min extent size
303 * to the allocation code.
304 */
305struct gfs2_alloc_parms {
306	u64 target;
307	u32 min_target;
308	u32 aflags;
309	u64 allowed;
310};
311
312enum {
313	GLF_LOCK			= 1,
314	GLF_INSTANTIATE_NEEDED		= 2, /* needs instantiate */
315	GLF_DEMOTE			= 3,
316	GLF_PENDING_DEMOTE		= 4,
317	GLF_DEMOTE_IN_PROGRESS		= 5,
318	GLF_DIRTY			= 6,
319	GLF_LFLUSH			= 7,
320	GLF_HAVE_REPLY			= 9,
321	GLF_INITIAL			= 10,
322	GLF_HAVE_FROZEN_REPLY		= 11,
323	GLF_INSTANTIATE_IN_PROG		= 12, /* instantiate happening now */
324	GLF_LRU				= 13,
325	GLF_OBJECT			= 14, /* Used only for tracing */
326	GLF_BLOCKING			= 15,
327	GLF_TRY_TO_EVICT		= 17, /* iopen glocks only */
328	GLF_VERIFY_DELETE		= 18, /* iopen glocks only */
329	GLF_PENDING_REPLY		= 19,
330	GLF_DEFER_DELETE		= 20, /* iopen glocks only */
331	GLF_CANCELING			= 21,
332};
333
334struct gfs2_glock {
335	unsigned long gl_flags;		/* GLF_... */
336	struct lm_lockname gl_name;
337
338	struct lockref gl_lockref;
339
340	/* State fields protected by gl_lockref.lock */
341	unsigned int gl_state:2,	/* Current state */
342		     gl_target:2,	/* Target state */
343		     gl_demote_state:2,	/* State requested by remote node */
344		     gl_req:2,		/* State in last dlm request */
345		     gl_reply:8;	/* Last reply from the dlm */
346
347	unsigned long gl_demote_time; /* time of first demote request */
348	long gl_hold_time;
349	struct list_head gl_holders;
350
351	const struct gfs2_glock_operations *gl_ops;
352	ktime_t gl_dstamp;
353	struct gfs2_lkstats gl_stats;
354	struct dlm_lksb gl_lksb;
355	unsigned long gl_tchange;
356	void *gl_object;
357
358	struct list_head gl_lru;
359	struct list_head gl_ail_list;
360	atomic_t gl_ail_count;
361	atomic_t gl_revokes;
362	struct delayed_work gl_work;
363	/* For iopen glocks only */
364	struct {
365		struct delayed_work gl_delete;
366		u64 gl_no_formal_ino;
367	};
368	struct rcu_head gl_rcu;
369	struct rhash_head gl_node;
370};
371
372enum {
373	GIF_QD_LOCKED		= 1,
374	GIF_SW_PAGED		= 3,
375	GIF_GLOP_PENDING	= 6,
376};
377
378struct gfs2_inode {
379	struct inode i_inode;
380	u64 i_no_addr;
381	u64 i_no_formal_ino;
382	u64 i_generation;
383	u64 i_eattr;
384	unsigned long i_flags;		/* GIF_... */
385	struct gfs2_glock *i_gl;
386	struct gfs2_holder i_iopen_gh;
387	struct gfs2_qadata *i_qadata; /* quota allocation data */
388	struct gfs2_holder i_rgd_gh;
389	struct gfs2_blkreserv i_res; /* rgrp multi-block reservation */
390	u64 i_goal;	/* goal block for allocations */
391	atomic_t i_sizehint;  /* hint of the write size */
392	struct rw_semaphore i_rw_mutex;
393	struct list_head i_ordered;
394	__be64 *i_hash_cache;
395	u32 i_entries;
396	u32 i_diskflags;
397	u8 i_height;
398	u8 i_depth;
399	u16 i_rahead;
400};
401
402/*
403 * Since i_inode is the first element of struct gfs2_inode,
404 * this is effectively a cast.
405 */
406static inline struct gfs2_inode *GFS2_I(struct inode *inode)
407{
408	return container_of(inode, struct gfs2_inode, i_inode);
409}
410
411static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
412{
413	return inode->i_sb->s_fs_info;
414}
415
416struct gfs2_file {
417	struct mutex f_fl_mutex;
418	struct gfs2_holder f_fl_gh;
419};
420
421struct gfs2_revoke_replay {
422	struct list_head rr_list;
423	u64 rr_blkno;
424	unsigned int rr_where;
425};
426
427enum {
428	QDF_CHANGE		= 1,
429	QDF_LOCKED		= 2,
430	QDF_REFRESH		= 3,
431	QDF_QMSG_QUIET          = 4,
432};
433
434struct gfs2_quota_data {
435	struct hlist_bl_node qd_hlist;
436	struct list_head qd_list;
437	struct kqid qd_id;
438	struct gfs2_sbd *qd_sbd;
439	struct lockref qd_lockref;
440	struct list_head qd_lru;
441	unsigned qd_hash;
442
443	unsigned long qd_flags;		/* QDF_... */
444
445	s64 qd_change;
446	s64 qd_change_sync;
447
448	unsigned int qd_slot;
449	unsigned int qd_slot_ref;
450
451	struct buffer_head *qd_bh;
452	struct gfs2_quota_change *qd_bh_qc;
453	unsigned int qd_bh_count;
454
455	struct gfs2_glock *qd_gl;
456	struct gfs2_quota_lvb qd_qb;
457
458	u64 qd_sync_gen;
459	unsigned long qd_last_warn;
460	struct rcu_head qd_rcu;
461};
462
463enum {
464	TR_TOUCHED = 1,
465	TR_ATTACHED = 2,
466	TR_ONSTACK = 3,
467};
468
469struct gfs2_trans {
470	unsigned long tr_ip;
471
472	unsigned int tr_blocks;
473	unsigned int tr_revokes;
474	unsigned int tr_reserved;
475	unsigned long tr_flags;
476
477	unsigned int tr_num_buf_new;
478	unsigned int tr_num_databuf_new;
479	unsigned int tr_num_buf_rm;
480	unsigned int tr_num_databuf_rm;
481	unsigned int tr_num_revoke;
482
483	struct list_head tr_list;
484	struct list_head tr_databuf;
485	struct list_head tr_buf;
486
487	unsigned int tr_first;
488	struct list_head tr_ail1_list;
489	struct list_head tr_ail2_list;
490};
491
492struct gfs2_journal_extent {
493	struct list_head list;
494
495	unsigned int lblock; /* First logical block */
496	u64 dblock; /* First disk block */
497	u64 blocks;
498};
499
500struct gfs2_jdesc {
501	struct list_head jd_list;
502	struct list_head extent_list;
503	unsigned int nr_extents;
504	struct work_struct jd_work;
505	struct inode *jd_inode;
506	struct bio *jd_log_bio;
507	unsigned long jd_flags;
508#define JDF_RECOVERY 1
509	unsigned int jd_jid;
510	u32 jd_blocks;
511	int jd_recover_error;
512	/* Replay stuff */
513
514	unsigned int jd_found_blocks;
515	unsigned int jd_found_revokes;
516	unsigned int jd_replayed_blocks;
517
518	struct list_head jd_revoke_list;
519	unsigned int jd_replay_tail;
520};
521
522struct gfs2_statfs_change_host {
523	s64 sc_total;
524	s64 sc_free;
525	s64 sc_dinodes;
526};
527
528#define GFS2_QUOTA_DEFAULT	GFS2_QUOTA_OFF
529#define GFS2_QUOTA_OFF		0
530#define GFS2_QUOTA_ACCOUNT	1
531#define GFS2_QUOTA_ON		2
532#define GFS2_QUOTA_QUIET	3 /* on but not complaining */
533
534#define GFS2_DATA_DEFAULT	GFS2_DATA_ORDERED
535#define GFS2_DATA_WRITEBACK	1
536#define GFS2_DATA_ORDERED	2
537
538#define GFS2_ERRORS_DEFAULT     GFS2_ERRORS_WITHDRAW
539#define GFS2_ERRORS_WITHDRAW    0
540#define GFS2_ERRORS_DEACTIVATE  1
541#define GFS2_ERRORS_PANIC       3
542
543struct gfs2_args {
544	char ar_lockproto[GFS2_LOCKNAME_LEN];	/* Name of the Lock Protocol */
545	char ar_locktable[GFS2_LOCKNAME_LEN];	/* Name of the Lock Table */
546	char ar_hostdata[GFS2_LOCKNAME_LEN];	/* Host specific data */
547	unsigned int ar_spectator:1;		/* Don't get a journal */
548	unsigned int ar_localflocks:1;		/* Let the VFS do flock|fcntl */
549	unsigned int ar_debug:1;		/* Oops on errors */
550	unsigned int ar_posix_acl:1;		/* Enable posix acls */
551	unsigned int ar_quota:2;		/* off/account/on */
552	unsigned int ar_suiddir:1;		/* suiddir support */
553	unsigned int ar_data:2;			/* ordered/writeback */
554	unsigned int ar_meta:1;			/* mount metafs */
555	unsigned int ar_discard:1;		/* discard requests */
556	unsigned int ar_errors:2;               /* errors=withdraw | deactivate | panic */
557	unsigned int ar_nobarrier:1;            /* do not send barriers */
558	unsigned int ar_rgrplvb:1;		/* use lvbs for rgrp info */
559	unsigned int ar_got_rgrplvb:1;		/* Was the rgrplvb opt given? */
560	unsigned int ar_loccookie:1;		/* use location based readdir
561						   cookies */
562	s32 ar_commit;				/* Commit interval */
563	s32 ar_statfs_quantum;			/* The fast statfs interval */
564	s32 ar_quota_quantum;			/* The quota interval */
565	s32 ar_statfs_percent;			/* The % change to force sync */
566};
567
568struct gfs2_tune {
569	spinlock_t gt_spin;
570
571	unsigned int gt_logd_secs;
572
573	unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
574	unsigned int gt_quota_scale_num; /* Numerator */
575	unsigned int gt_quota_scale_den; /* Denominator */
576	unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
577	unsigned int gt_new_files_jdata;
578	unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
579	unsigned int gt_complain_secs;
580	unsigned int gt_statfs_quantum;
581	unsigned int gt_statfs_slow;
582	unsigned int gt_withdraw_helper_timeout;
583};
584
585enum {
586	SDF_JOURNAL_CHECKED	= 0,
587	SDF_JOURNAL_LIVE	= 1,
588	SDF_WITHDRAWN		= 2,
589	SDF_NOBARRIERS		= 3,
590	SDF_NORECOVERY		= 4,
591	SDF_DEMOTE		= 5,
592	SDF_NOJOURNALID		= 6,
593	SDF_RORECOVERY		= 7, /* read only recovery */
594	SDF_SKIP_DLM_UNLOCK	= 8,
595	SDF_FORCE_AIL_FLUSH     = 9,
596	SDF_FREEZE_INITIATOR	= 10,
597	SDF_KILL		= 15,
598	SDF_EVICTING		= 16,
599	SDF_FROZEN		= 17,
600};
601
602#define GFS2_FSNAME_LEN		256
603
604struct gfs2_inum_host {
605	u64 no_formal_ino;
606	u64 no_addr;
607};
608
609struct gfs2_sb_host {
610	u32 sb_magic;
611	u32 sb_type;
612
613	u32 sb_fs_format;
614	u32 sb_multihost_format;
615	u32 sb_bsize;
616	u32 sb_bsize_shift;
617
618	struct gfs2_inum_host sb_master_dir;
619	struct gfs2_inum_host sb_root_dir;
620
621	char sb_lockproto[GFS2_LOCKNAME_LEN];
622	char sb_locktable[GFS2_LOCKNAME_LEN];
623};
624
625/*
626 * lm_mount() return values
627 *
628 * ls_jid - the journal ID this node should use
629 * ls_first - this node is the first to mount the file system
630 * ls_lockspace - lock module's context for this file system
631 * ls_ops - lock module's functions
632 */
633
634struct lm_lockstruct {
635	int ls_jid;
636	unsigned int ls_first;
637	const struct lm_lockops *ls_ops;
638	dlm_lockspace_t *ls_dlm;
639
640	int ls_recover_jid_done;   /* These two are deprecated, */
641	int ls_recover_jid_status; /* used previously by gfs_controld */
642
643	struct dlm_lksb ls_mounted_lksb; /* mounted_lock */
644	struct dlm_lksb ls_control_lksb; /* control_lock */
645	char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */
646	struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */
647	char *ls_lvb_bits;
648
649	struct rw_semaphore ls_sem;
650
651	spinlock_t ls_recover_spin; /* protects following fields */
652	unsigned long ls_recover_flags; /* DFL_ */
653	uint32_t ls_recover_mount; /* gen in first recover_done cb */
654	uint32_t ls_recover_start; /* gen in last recover_done cb */
655	uint32_t ls_recover_block; /* copy recover_start in last recover_prep */
656	uint32_t ls_recover_size; /* size of recover_submit, recover_result */
657	uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */
658	uint32_t *ls_recover_result; /* result of last jid recovery */
659};
660
661struct gfs2_pcpu_lkstats {
662	/* One struct for each glock type */
663	struct gfs2_lkstats lkstats[10];
664};
665
666/* List of local (per node) statfs inodes */
667struct local_statfs_inode {
668	struct list_head si_list;
669	struct inode *si_sc_inode;
670	unsigned int si_jid; /* journal id this statfs inode corresponds to */
671};
672
673struct gfs2_sbd {
674	struct super_block *sd_vfs;
675	struct gfs2_pcpu_lkstats __percpu *sd_lkstats;
676	struct kobject sd_kobj;
677	struct completion sd_kobj_unregister;
678	unsigned long sd_flags;	/* SDF_... */
679	struct gfs2_sb_host sd_sb;
680
681	/* Constants computed on mount */
682
683	u32 sd_fsb2bb;
684	u32 sd_fsb2bb_shift;
685	u32 sd_diptrs;	/* Number of pointers in a dinode */
686	u32 sd_inptrs;	/* Number of pointers in a indirect block */
687	u32 sd_ldptrs;  /* Number of pointers in a log descriptor block */
688	u32 sd_jbsize;	/* Size of a journaled data block */
689	u32 sd_hash_bsize;	/* sizeof(exhash block) */
690	u32 sd_hash_bsize_shift;
691	u32 sd_hash_ptrs;	/* Number of pointers in a hash block */
692	u32 sd_qc_per_block;
693	u32 sd_blocks_per_bitmap;
694	u32 sd_max_dirres;	/* Max blocks needed to add a directory entry */
695	u32 sd_max_height;	/* Max height of a file's metadata tree */
696	u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
697	u32 sd_max_dents_per_leaf; /* Max number of dirents in a leaf block */
698
699	struct gfs2_args sd_args;	/* Mount arguments */
700	struct gfs2_tune sd_tune;	/* Filesystem tuning structure */
701
702	/* Lock Stuff */
703
704	struct lm_lockstruct sd_lockstruct;
705	struct gfs2_holder sd_live_gh;
706	struct gfs2_glock *sd_rename_gl;
707	struct gfs2_glock *sd_freeze_gl;
708	struct work_struct sd_freeze_work;
709	struct work_struct sd_withdraw_work;
710	wait_queue_head_t sd_kill_wait;
711	wait_queue_head_t sd_async_glock_wait;
712	atomic_t sd_glock_disposal;
713	struct completion sd_locking_init;
714	struct completion sd_withdraw_helper;
715	int sd_withdraw_helper_status;
716	struct delayed_work sd_control_work;
717
718	/* Inode Stuff */
719
720	struct dentry *sd_master_dir;
721	struct dentry *sd_root_dir;
722
723	struct inode *sd_jindex;
724	struct inode *sd_statfs_inode;
725	struct inode *sd_sc_inode;
726	struct list_head sd_sc_inodes_list;
727	struct inode *sd_qc_inode;
728	struct inode *sd_rindex;
729	struct inode *sd_quota_inode;
730
731	/* StatFS stuff */
732
733	spinlock_t sd_statfs_spin;
734	struct gfs2_statfs_change_host sd_statfs_master;
735	struct gfs2_statfs_change_host sd_statfs_local;
736	int sd_statfs_force_sync;
737
738	/* Resource group stuff */
739
740	int sd_rindex_uptodate;
741	spinlock_t sd_rindex_spin;
742	struct rb_root sd_rindex_tree;
743	unsigned int sd_rgrps;
744	unsigned int sd_max_rg_data;
745
746	/* Journal index stuff */
747
748	struct list_head sd_jindex_list;
749	spinlock_t sd_jindex_spin;
750	struct mutex sd_jindex_mutex;
751	unsigned int sd_journals;
752
753	struct gfs2_jdesc *sd_jdesc;
754	struct gfs2_holder sd_journal_gh;
755	struct gfs2_holder sd_jinode_gh;
756
757	struct gfs2_holder sd_sc_gh;
758	struct buffer_head *sd_sc_bh;
759	struct gfs2_holder sd_qc_gh;
760
761	struct completion sd_journal_ready;
762
763	/* Workqueue stuff */
764
765	struct workqueue_struct *sd_glock_wq;
766	struct workqueue_struct *sd_delete_wq;
767
768	/* Daemon stuff */
769
770	struct task_struct *sd_logd_process;
771	struct task_struct *sd_quotad_process;
772
773	/* Quota stuff */
774
775	struct list_head sd_quota_list;
776	atomic_t sd_quota_count;
777	struct mutex sd_quota_sync_mutex;
778	wait_queue_head_t sd_quota_wait;
779
780	unsigned int sd_quota_slots;
781	unsigned long *sd_quota_bitmap;
782	spinlock_t sd_bitmap_lock;
783
784	u64 sd_quota_sync_gen;
785
786	/* Log stuff */
787
788	struct inode *sd_inode;
789
790	spinlock_t sd_log_lock;
791
792	struct gfs2_trans *sd_log_tr;
793	unsigned int sd_log_blks_reserved;
794
795	atomic_t sd_log_pinned;
796	unsigned int sd_log_num_revoke;
797
798	struct list_head sd_log_revokes;
799	struct list_head sd_log_ordered;
800	spinlock_t sd_ordered_lock;
801
802	atomic_t sd_log_thresh1;
803	atomic_t sd_log_thresh2;
804	atomic_t sd_log_blks_free;
805	atomic_t sd_log_blks_needed;
806	atomic_t sd_log_revokes_available;
807	wait_queue_head_t sd_log_waitq;
808	wait_queue_head_t sd_logd_waitq;
809
810	u64 sd_log_sequence;
811	int sd_log_idle;
812
813	struct rw_semaphore sd_log_flush_lock;
814	atomic_t sd_log_in_flight;
815	wait_queue_head_t sd_log_flush_wait;
816	int sd_log_error; /* First log error */
817
818	unsigned int sd_log_tail;
819	unsigned int sd_log_flush_tail;
820	unsigned int sd_log_head;
821	unsigned int sd_log_flush_head;
822
823	spinlock_t sd_ail_lock;
824	struct list_head sd_ail1_list;
825	struct list_head sd_ail2_list;
826
827	/* For quiescing the filesystem */
828	struct gfs2_holder sd_freeze_gh;
829	struct mutex sd_freeze_mutex;
830	struct list_head sd_dead_glocks;
831
832	char sd_fsname[GFS2_FSNAME_LEN + 3 * sizeof(int) + 2];
833	char sd_table_name[GFS2_FSNAME_LEN];
834	char sd_proto_name[GFS2_FSNAME_LEN];
835
836	/* Debugging crud */
837
838	unsigned long sd_last_warning;
839	struct dentry *debugfs_dir;    /* debugfs directory */
840};
841
842#define GFS2_BAD_INO 1
843
844static inline struct address_space *gfs2_aspace(struct gfs2_sbd *sdp)
845{
846	return sdp->sd_inode->i_mapping;
847}
848
849static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which)
850{
851	gl->gl_stats.stats[which]++;
852}
853
854static inline void gfs2_sbstats_inc(const struct gfs2_glock *gl, int which)
855{
856	const struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
857	preempt_disable();
858	this_cpu_ptr(sdp->sd_lkstats)->lkstats[gl->gl_name.ln_type].stats[which]++;
859	preempt_enable();
860}
861
862struct gfs2_rgrpd *gfs2_glock2rgrp(struct gfs2_glock *gl);
863
864static inline unsigned gfs2_max_stuffed_size(const struct gfs2_inode *ip)
865{
866	return GFS2_SB(&ip->i_inode)->sd_sb.sb_bsize - sizeof(struct gfs2_dinode);
867}
868
869#endif /* __INCORE_DOT_H__ */
870