[net-next-2.6.git] / fs / gfs2 / incore.h

/*
 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
 * Copyright (C) 2004-2005 Red Hat, Inc.  All rights reserved.
 *
 * This copyrighted material is made available to anyone wishing to use,
 * modify, copy, or redistribute it subject to the terms and conditions
 * of the GNU General Public License v.2.
 */

#ifndef __INCORE_DOT_H__
#define __INCORE_DOT_H__

#define DIO_FORCE	0x00000001
#define DIO_CLEAN	0x00000002
#define DIO_DIRTY	0x00000004
#define DIO_START	0x00000008
#define DIO_WAIT	0x00000010
#define DIO_METADATA	0x00000020
#define DIO_DATA	0x00000040
#define DIO_RELEASE	0x00000080
#define DIO_ALL		0x00000100

struct gfs2_log_operations;
struct gfs2_log_element;
struct gfs2_bitmap;
struct gfs2_rgrpd;
struct gfs2_bufdata;
struct gfs2_glock_operations;
struct gfs2_holder;
struct gfs2_glock;
struct gfs2_alloc;
struct gfs2_inode;
struct gfs2_file;
struct gfs2_revoke;
struct gfs2_revoke_replay;
struct gfs2_unlinked;
struct gfs2_quota_data;
struct gfs2_log_buf;
struct gfs2_trans;
struct gfs2_ail;
struct gfs2_jdesc;
struct gfs2_args;
struct gfs2_tune;
struct gfs2_gl_hash_bucket;
struct gfs2_sbd;

typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);

/*
 * Structure of operations that are associated with each
 * type of element in the log.
 */

struct gfs2_log_operations {
	void (*lo_add) (struct gfs2_sbd *sdp, struct gfs2_log_element *le);
	void (*lo_incore_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr);
	void (*lo_before_commit) (struct gfs2_sbd *sdp);
	void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_ail *ai);
	void (*lo_before_scan) (struct gfs2_jdesc *jd,
				struct gfs2_log_header *head, int pass);
	int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start,
				 struct gfs2_log_descriptor *ld, __be64 *ptr,
				 int pass);
	void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass);
	char *lo_name;
};

struct gfs2_log_element {
	struct list_head le_list;
	struct gfs2_log_operations *le_ops;
};

struct gfs2_bitmap {
	struct buffer_head *bi_bh;
	char *bi_clone;
	uint32_t bi_offset;
	uint32_t bi_start;
	uint32_t bi_len;
};

struct gfs2_rgrpd {
	struct list_head rd_list;	/* Link with superblock */
	struct list_head rd_list_mru;
	struct list_head rd_recent;	/* Recently used rgrps */
	struct gfs2_glock *rd_gl;	/* Glock for this rgrp */
	struct gfs2_rindex rd_ri;
	struct gfs2_rgrp rd_rg;
	uint64_t rd_rg_vn;
	struct gfs2_bitmap *rd_bits;
	unsigned int rd_bh_count;
	struct semaphore rd_mutex;
	uint32_t rd_free_clone;
	struct gfs2_log_element rd_le;
	uint32_t rd_last_alloc_data;
	uint32_t rd_last_alloc_meta;
	struct gfs2_sbd *rd_sbd;
};

enum gfs2_state_bits {
	BH_Pinned = BH_PrivateStart,
};

BUFFER_FNS(Pinned, pinned)
TAS_BUFFER_FNS(Pinned, pinned)

struct gfs2_bufdata {
	struct buffer_head *bd_bh;
	struct gfs2_glock *bd_gl;

	struct list_head bd_list_tr;
	struct gfs2_log_element bd_le;

	struct gfs2_ail *bd_ail;
	struct list_head bd_ail_st_list;
	struct list_head bd_ail_gl_list;
};

struct gfs2_glock_operations {
	void (*go_xmote_th) (struct gfs2_glock * gl, unsigned int state,
			     int flags);
	void (*go_xmote_bh) (struct gfs2_glock * gl);
	void (*go_drop_th) (struct gfs2_glock * gl);
	void (*go_drop_bh) (struct gfs2_glock * gl);
	void (*go_sync) (struct gfs2_glock * gl, int flags);
	void (*go_inval) (struct gfs2_glock * gl, int flags);
	int (*go_demote_ok) (struct gfs2_glock * gl);
	int (*go_lock) (struct gfs2_holder * gh);
	void (*go_unlock) (struct gfs2_holder * gh);
	void (*go_callback) (struct gfs2_glock * gl, unsigned int state);
	void (*go_greedy) (struct gfs2_glock * gl);
	int go_type;
};

enum {
	/* Actions */
	HIF_MUTEX		= 0,
	HIF_PROMOTE		= 1,
	HIF_DEMOTE		= 2,
	HIF_GREEDY		= 3,

	/* States */
	HIF_ALLOCED		= 4,
	HIF_DEALLOC		= 5,
	HIF_HOLDER		= 6,
	HIF_FIRST		= 7,
	HIF_RECURSE		= 8,
	HIF_ABORTED		= 9,
};

struct gfs2_holder {
	struct list_head gh_list;

	struct gfs2_glock *gh_gl;
	struct task_struct *gh_owner;
	unsigned int gh_state;
	int gh_flags;

	int gh_error;
	unsigned long gh_iflags;
	struct completion gh_wait;
};

enum {
	GLF_PLUG		= 0,
	GLF_LOCK		= 1,
	GLF_STICKY		= 2,
	GLF_PREFETCH		= 3,
	GLF_SYNC		= 4,
	GLF_DIRTY		= 5,
	GLF_SKIP_WAITERS2	= 6,
	GLF_GREEDY		= 7,
};

struct gfs2_glock {
	struct list_head gl_list;
	unsigned long gl_flags;		/* GLF_... */
	struct lm_lockname gl_name;
	struct kref gl_ref;

	spinlock_t gl_spin;

	unsigned int gl_state;
	struct list_head gl_holders;
	struct list_head gl_waiters1;	/* HIF_MUTEX */
	struct list_head gl_waiters2;	/* HIF_DEMOTE, HIF_GREEDY */
	struct list_head gl_waiters3;	/* HIF_PROMOTE */

	struct gfs2_glock_operations *gl_ops;

	struct gfs2_holder *gl_req_gh;
	gfs2_glop_bh_t gl_req_bh;

	lm_lock_t *gl_lock;
	char *gl_lvb;
	atomic_t gl_lvb_count;

	uint64_t gl_vn;
	unsigned long gl_stamp;
	void *gl_object;

	struct gfs2_gl_hash_bucket *gl_bucket;
	struct list_head gl_reclaim;

	struct gfs2_sbd *gl_sbd;

	struct inode *gl_aspace;
	struct gfs2_log_element gl_le;
	struct list_head gl_ail_list;
	atomic_t gl_ail_count;
};

struct gfs2_alloc {
	/* Quota stuff */

	unsigned int al_qd_num;
	struct gfs2_quota_data *al_qd[4];
	struct gfs2_holder al_qd_ghs[4];

	/* Filled in by the caller to gfs2_inplace_reserve() */

	uint32_t al_requested;

	/* Filled in by gfs2_inplace_reserve() */

	char *al_file;
	unsigned int al_line;
	struct gfs2_holder al_ri_gh;
	struct gfs2_holder al_rgd_gh;
	struct gfs2_rgrpd *al_rgd;

	/* Filled in by gfs2_alloc_*() */

	uint32_t al_alloced;
};

enum {
	GIF_MIN_INIT		= 0,
	GIF_QD_LOCKED		= 1,
	GIF_PAGED		= 2,
	GIF_SW_PAGED		= 3,
};

struct gfs2_inode {
	struct gfs2_inum i_num;

	atomic_t i_count;
	unsigned long i_flags;		/* GIF_... */

	uint64_t i_vn;
	struct gfs2_dinode i_di;

	struct gfs2_glock *i_gl;
	struct gfs2_sbd *i_sbd;
	struct inode *i_vnode;

	struct gfs2_holder i_iopen_gh;

	struct gfs2_alloc i_alloc;
	uint64_t i_last_rg_alloc;

	spinlock_t i_spin;
	struct rw_semaphore i_rw_mutex;

	unsigned int i_greedy;
	unsigned long i_last_pfault;

	struct buffer_head *i_cache[GFS2_MAX_META_HEIGHT];
};

enum {
	GFF_DID_DIRECT_ALLOC	= 0,
};

struct gfs2_file {
	unsigned long f_flags;		/* GFF_... */

	struct semaphore f_fl_mutex;
	struct gfs2_holder f_fl_gh;

	struct gfs2_inode *f_inode;
	struct file *f_vfile;
};

struct gfs2_revoke {
	struct gfs2_log_element rv_le;
	uint64_t rv_blkno;
};

struct gfs2_revoke_replay {
	struct list_head rr_list;
	uint64_t rr_blkno;
	unsigned int rr_where;
};

enum {
	ULF_LOCKED		= 0,
};

struct gfs2_unlinked {
	struct list_head ul_list;
	unsigned int ul_count;
	struct gfs2_unlinked_tag ul_ut;
	unsigned long ul_flags;		/* ULF_... */
	unsigned int ul_slot;
};

enum {
	QDF_USER		= 0,
	QDF_CHANGE		= 1,
	QDF_LOCKED		= 2,
};

struct gfs2_quota_data {
	struct list_head qd_list;
	unsigned int qd_count;

	uint32_t qd_id;
	unsigned long qd_flags;		/* QDF_... */

	int64_t qd_change;
	int64_t qd_change_sync;

	unsigned int qd_slot;
	unsigned int qd_slot_count;

	struct buffer_head *qd_bh;
	struct gfs2_quota_change *qd_bh_qc;
	unsigned int qd_bh_count;

	struct gfs2_glock *qd_gl;
	struct gfs2_quota_lvb qd_qb;

	uint64_t qd_sync_gen;
	unsigned long qd_last_warn;
	unsigned long qd_last_touched;
};

struct gfs2_log_buf {
	struct list_head lb_list;
	struct buffer_head *lb_bh;
	struct buffer_head *lb_real;
};

struct gfs2_trans {
	char *tr_file;
	unsigned int tr_line;

	unsigned int tr_blocks;
	unsigned int tr_revokes;
	unsigned int tr_reserved;

	struct gfs2_holder *tr_t_gh;

	int tr_touched;

	unsigned int tr_num_buf;
	unsigned int tr_num_buf_new;
	unsigned int tr_num_buf_rm;
	struct list_head tr_list_buf;

	unsigned int tr_num_revoke;
	unsigned int tr_num_revoke_rm;
};

struct gfs2_ail {
	struct list_head ai_list;

	unsigned int ai_first;
	struct list_head ai_ail1_list;
	struct list_head ai_ail2_list;

	uint64_t ai_sync_gen;
};

struct gfs2_jdesc {
	struct list_head jd_list;

	struct gfs2_inode *jd_inode;
	unsigned int jd_jid;
	int jd_dirty;

	unsigned int jd_blocks;
};

#define GFS2_GLOCKD_DEFAULT	1
#define GFS2_GLOCKD_MAX		16

#define GFS2_QUOTA_DEFAULT	GFS2_QUOTA_OFF
#define GFS2_QUOTA_OFF		0
#define GFS2_QUOTA_ACCOUNT	1
#define GFS2_QUOTA_ON		2

#define GFS2_DATA_DEFAULT	GFS2_DATA_ORDERED
#define GFS2_DATA_WRITEBACK	1
#define GFS2_DATA_ORDERED	2

struct gfs2_args {
	char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
	char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
	char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
	int ar_spectator; /* Don't get a journal because we're always RO */
	int ar_ignore_local_fs; /* Don't optimize even if local_fs is 1 */
	int ar_localflocks; /* Let the VFS do flock|fcntl locks for us */
	int ar_localcaching; /* Local-style caching (dangerous on multihost) */
	int ar_debug; /* Oops on errors instead of trying to be graceful */
	int ar_upgrade; /* Upgrade ondisk/multihost format */
	unsigned int ar_num_glockd; /* Number of glockd threads */
	int ar_posix_acl; /* Enable posix acls */
	int ar_quota; /* off/account/on */
	int ar_suiddir; /* suiddir support */
	int ar_data; /* ordered/writeback */
};

struct gfs2_tune {
	spinlock_t gt_spin;

	unsigned int gt_ilimit;
	unsigned int gt_ilimit_tries;
	unsigned int gt_ilimit_min;
	unsigned int gt_demote_secs; /* Cache retention for unheld glock */
	unsigned int gt_incore_log_blocks;
	unsigned int gt_log_flush_secs;
	unsigned int gt_jindex_refresh_secs; /* Check for new journal index */

	unsigned int gt_scand_secs;
	unsigned int gt_recoverd_secs;
	unsigned int gt_logd_secs;
	unsigned int gt_quotad_secs;
	unsigned int gt_inoded_secs;

	unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
	unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
	unsigned int gt_quota_scale_num; /* Numerator */
	unsigned int gt_quota_scale_den; /* Denominator */
	unsigned int gt_quota_cache_secs;
	unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
	unsigned int gt_atime_quantum; /* Min secs between atime updates */
	unsigned int gt_new_files_jdata;
	unsigned int gt_new_files_directio;
	unsigned int gt_max_atomic_write; /* Split big writes into this size */
	unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
	unsigned int gt_lockdump_size;
	unsigned int gt_stall_secs; /* Detects trouble! */
	unsigned int gt_complain_secs;
	unsigned int gt_reclaim_limit; /* Max num of glocks in reclaim list */
	unsigned int gt_entries_per_readdir;
	unsigned int gt_prefetch_secs; /* Usage window for prefetched glocks */
	unsigned int gt_greedy_default;
	unsigned int gt_greedy_quantum;
	unsigned int gt_greedy_max;
	unsigned int gt_statfs_quantum;
	unsigned int gt_statfs_slow;
};

struct gfs2_gl_hash_bucket {
	rwlock_t hb_lock;
	struct list_head hb_list;
};

enum {
	SDF_JOURNAL_CHECKED	= 0,
	SDF_JOURNAL_LIVE	= 1,
	SDF_SHUTDOWN		= 2,
	SDF_NOATIME		= 3,
};

#define GFS2_GL_HASH_SHIFT	13
#define GFS2_GL_HASH_SIZE	(1 << GFS2_GL_HASH_SHIFT)
#define GFS2_GL_HASH_MASK	(GFS2_GL_HASH_SIZE - 1)
#define GFS2_FSNAME_LEN		256

struct gfs2_sbd {
	struct super_block *sd_vfs;
	struct kobject sd_kobj;
	unsigned long sd_flags;	/* SDF_... */
	struct gfs2_sb sd_sb;

	/* Constants computed on mount */

	uint32_t sd_fsb2bb;
	uint32_t sd_fsb2bb_shift;
	uint32_t sd_diptrs;	/* Number of pointers in a dinode */
	uint32_t sd_inptrs;	/* Number of pointers in a indirect block */
	uint32_t sd_jbsize;	/* Size of a journaled data block */
	uint32_t sd_hash_bsize;	/* sizeof(exhash block) */
	uint32_t sd_hash_bsize_shift;
	uint32_t sd_hash_ptrs;	/* Number of pointers in a hash block */
	uint32_t sd_ut_per_block;
	uint32_t sd_qc_per_block;
	uint32_t sd_max_dirres;	/* Max blocks needed to add a directory entry */
	uint32_t sd_max_height;	/* Max height of a file's metadata tree */
	uint64_t sd_heightsize[GFS2_MAX_META_HEIGHT];
	uint32_t sd_max_jheight; /* Max height of journaled file's meta tree */
	uint64_t sd_jheightsize[GFS2_MAX_META_HEIGHT];

	struct gfs2_args sd_args;	/* Mount arguments */
	struct gfs2_tune sd_tune;	/* Filesystem tuning structure */

	/* Lock Stuff */

	struct lm_lockstruct sd_lockstruct;
	struct gfs2_gl_hash_bucket sd_gl_hash[GFS2_GL_HASH_SIZE];
	struct list_head sd_reclaim_list;
	spinlock_t sd_reclaim_lock;
	wait_queue_head_t sd_reclaim_wq;
	atomic_t sd_reclaim_count;
	struct gfs2_holder sd_live_gh;
	struct gfs2_glock *sd_rename_gl;
	struct gfs2_glock *sd_trans_gl;
	struct semaphore sd_invalidate_inodes_mutex;

	/* Inode Stuff */

	struct gfs2_inode *sd_master_dir;
	struct gfs2_inode *sd_jindex;
	struct gfs2_inode *sd_inum_inode;
	struct gfs2_inode *sd_statfs_inode;
	struct gfs2_inode *sd_ir_inode;
	struct gfs2_inode *sd_sc_inode;
	struct gfs2_inode *sd_ut_inode;
	struct gfs2_inode *sd_qc_inode;
	struct gfs2_inode *sd_rindex;
	struct gfs2_inode *sd_quota_inode;
	struct gfs2_inode *sd_root_dir;

	/* Inum stuff */

	struct semaphore sd_inum_mutex;

	/* StatFS stuff */

	spinlock_t sd_statfs_spin;
	struct semaphore sd_statfs_mutex;
	struct gfs2_statfs_change sd_statfs_master;
	struct gfs2_statfs_change sd_statfs_local;
	unsigned long sd_statfs_sync_time;

	/* Resource group stuff */

	uint64_t sd_rindex_vn;
	spinlock_t sd_rindex_spin;
	struct semaphore sd_rindex_mutex;
	struct list_head sd_rindex_list;
	struct list_head sd_rindex_mru_list;
	struct list_head sd_rindex_recent_list;
	struct gfs2_rgrpd *sd_rindex_forward;
	unsigned int sd_rgrps;

	/* Journal index stuff */

	struct list_head sd_jindex_list;
	spinlock_t sd_jindex_spin;
	struct semaphore sd_jindex_mutex;
	unsigned int sd_journals;
	unsigned long sd_jindex_refresh_time;

	struct gfs2_jdesc *sd_jdesc;
	struct gfs2_holder sd_journal_gh;
	struct gfs2_holder sd_jinode_gh;

	struct gfs2_holder sd_ir_gh;
	struct gfs2_holder sd_sc_gh;
	struct gfs2_holder sd_ut_gh;
	struct gfs2_holder sd_qc_gh;

	/* Daemon stuff */

	struct task_struct *sd_scand_process;
	struct task_struct *sd_recoverd_process;
	struct task_struct *sd_logd_process;
	struct task_struct *sd_quotad_process;
	struct task_struct *sd_inoded_process;
	struct task_struct *sd_glockd_process[GFS2_GLOCKD_MAX];
	unsigned int sd_glockd_num;

	/* Unlinked inode stuff */

	struct list_head sd_unlinked_list;
	atomic_t sd_unlinked_count;
	spinlock_t sd_unlinked_spin;
	struct semaphore sd_unlinked_mutex;

	unsigned int sd_unlinked_slots;
	unsigned int sd_unlinked_chunks;
	unsigned char **sd_unlinked_bitmap;

	/* Quota stuff */

	struct list_head sd_quota_list;
	atomic_t sd_quota_count;
	spinlock_t sd_quota_spin;
	struct semaphore sd_quota_mutex;

	unsigned int sd_quota_slots;
	unsigned int sd_quota_chunks;
	unsigned char **sd_quota_bitmap;

	uint64_t sd_quota_sync_gen;
	unsigned long sd_quota_sync_time;

	/* Log stuff */

	spinlock_t sd_log_lock;
	atomic_t sd_log_trans_count;
	wait_queue_head_t sd_log_trans_wq;
	atomic_t sd_log_flush_count;
	wait_queue_head_t sd_log_flush_wq;

	unsigned int sd_log_blks_reserved;
	unsigned int sd_log_commited_buf;
	unsigned int sd_log_commited_revoke;

	unsigned int sd_log_num_gl;
	unsigned int sd_log_num_buf;
	unsigned int sd_log_num_revoke;
	unsigned int sd_log_num_rg;
	unsigned int sd_log_num_databuf;
	struct list_head sd_log_le_gl;
	struct list_head sd_log_le_buf;
	struct list_head sd_log_le_revoke;
	struct list_head sd_log_le_rg;
	struct list_head sd_log_le_databuf;

	unsigned int sd_log_blks_free;
	struct list_head sd_log_blks_list;
	wait_queue_head_t sd_log_blks_wait;

	uint64_t sd_log_sequence;
	unsigned int sd_log_head;
	unsigned int sd_log_tail;
	uint64_t sd_log_wraps;
	int sd_log_idle;

	unsigned long sd_log_flush_time;
	struct semaphore sd_log_flush_lock;
	struct list_head sd_log_flush_list;

	unsigned int sd_log_flush_head;
	uint64_t sd_log_flush_wrapped;

	struct list_head sd_ail1_list;
	struct list_head sd_ail2_list;
	uint64_t sd_ail_sync_gen;

	/* Replay stuff */

	struct list_head sd_revoke_list;
	unsigned int sd_replay_tail;

	unsigned int sd_found_blocks;
	unsigned int sd_found_revokes;
	unsigned int sd_replayed_blocks;

	/* For quiescing the filesystem */

	struct gfs2_holder sd_freeze_gh;
	struct semaphore sd_freeze_lock;
	unsigned int sd_freeze_count;

	/* Counters */

	atomic_t sd_glock_count;
	atomic_t sd_glock_held_count;
	atomic_t sd_inode_count;
	atomic_t sd_bufdata_count;

	atomic_t sd_fh2dentry_misses;
	atomic_t sd_reclaimed;
	atomic_t sd_log_flush_incore;
	atomic_t sd_log_flush_ondisk;

	atomic_t sd_glock_nq_calls;
	atomic_t sd_glock_dq_calls;
	atomic_t sd_glock_prefetch_calls;
	atomic_t sd_lm_lock_calls;
	atomic_t sd_lm_unlock_calls;
	atomic_t sd_lm_callbacks;

	atomic_t sd_ops_address;
	atomic_t sd_ops_dentry;
	atomic_t sd_ops_export;
	atomic_t sd_ops_file;
	atomic_t sd_ops_inode;
	atomic_t sd_ops_super;
	atomic_t sd_ops_vm;

	char sd_fsname[GFS2_FSNAME_LEN];
	char sd_table_name[GFS2_FSNAME_LEN];
	char sd_proto_name[GFS2_FSNAME_LEN];

	/* Debugging crud */

	unsigned long sd_last_warning;
};

#endif /* __INCORE_DOT_H__ */
Commit	Line	Data
b3b94faa DT	1	/*
	2	* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
	3	* Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
	4	*
	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 v.2.
	8	*/
	9
	10	#ifndef __INCORE_DOT_H__
	11	#define __INCORE_DOT_H__
	12
	13	#define DIO_FORCE 0x00000001
	14	#define DIO_CLEAN 0x00000002
	15	#define DIO_DIRTY 0x00000004
	16	#define DIO_START 0x00000008
	17	#define DIO_WAIT 0x00000010
	18	#define DIO_METADATA 0x00000020
	19	#define DIO_DATA 0x00000040
	20	#define DIO_RELEASE 0x00000080
	21	#define DIO_ALL 0x00000100
	22
	23	struct gfs2_log_operations;
	24	struct gfs2_log_element;
	25	struct gfs2_bitmap;
	26	struct gfs2_rgrpd;
	27	struct gfs2_bufdata;
b3b94faa DT	28	struct gfs2_glock_operations;
	29	struct gfs2_holder;
	30	struct gfs2_glock;
	31	struct gfs2_alloc;
	32	struct gfs2_inode;
	33	struct gfs2_file;
	34	struct gfs2_revoke;
	35	struct gfs2_revoke_replay;
	36	struct gfs2_unlinked;
	37	struct gfs2_quota_data;
	38	struct gfs2_log_buf;
	39	struct gfs2_trans;
	40	struct gfs2_ail;
	41	struct gfs2_jdesc;
	42	struct gfs2_args;
	43	struct gfs2_tune;
	44	struct gfs2_gl_hash_bucket;
	45	struct gfs2_sbd;
	46
	47	typedef void (gfs2_glop_bh_t) (struct gfs2_glock gl, unsigned int ret);
	48
	49	/*
	50	* Structure of operations that are associated with each
	51	* type of element in the log.
	52	*/
	53
	54	struct gfs2_log_operations {
	55	void (lo_add) (struct gfs2_sbd sdp, struct gfs2_log_element *le);
	56	void (lo_incore_commit) (struct gfs2_sbd sdp, struct gfs2_trans *tr);
	57	void (lo_before_commit) (struct gfs2_sbd sdp);
	58	void (lo_after_commit) (struct gfs2_sbd sdp, struct gfs2_ail *ai);
	59	void (lo_before_scan) (struct gfs2_jdesc jd,
	60	struct gfs2_log_header *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	char *lo_name;
	66	};
	67
	68	struct gfs2_log_element {
	69	struct list_head le_list;
	70	struct gfs2_log_operations *le_ops;
	71	};
	72
	73	struct gfs2_bitmap {
	74	struct buffer_head *bi_bh;
	75	char *bi_clone;
	76	uint32_t bi_offset;
	77	uint32_t bi_start;
	78	uint32_t bi_len;
	79	};
	80
	81	struct gfs2_rgrpd {
	82	struct list_head rd_list; /* Link with superblock */
	83	struct list_head rd_list_mru;
	84	struct list_head rd_recent; /* Recently used rgrps */
	85	struct gfs2_glock rd_gl; / Glock for this rgrp */
	86	struct gfs2_rindex rd_ri;
	87	struct gfs2_rgrp rd_rg;
	88	uint64_t rd_rg_vn;
	89	struct gfs2_bitmap *rd_bits;
	90	unsigned int rd_bh_count;
	91	struct semaphore rd_mutex;
92	uint32_t rd_free_clone;
93	struct gfs2_log_element rd_le;
94	uint32_t rd_last_alloc_data;
95	uint32_t rd_last_alloc_meta;
96	struct gfs2_sbd *rd_sbd;
97	};
98
99	enum gfs2_state_bits {
100	BH_Pinned = BH_PrivateStart,
101	};
102
103	BUFFER_FNS(Pinned, pinned)
104	TAS_BUFFER_FNS(Pinned, pinned)
105
106	struct gfs2_bufdata {
107	struct buffer_head *bd_bh;
108	struct gfs2_glock *bd_gl;
109
110	struct list_head bd_list_tr;
111	struct gfs2_log_element bd_le;
112
113	struct gfs2_ail *bd_ail;
114	struct list_head bd_ail_st_list;
115	struct list_head bd_ail_gl_list;
116	};
117
b3b94faa DT	118	struct gfs2_glock_operations {
	119	void (go_xmote_th) (struct gfs2_glock gl, unsigned int state,
	120	int flags);
	121	void (go_xmote_bh) (struct gfs2_glock gl);
	122	void (go_drop_th) (struct gfs2_glock gl);
	123	void (go_drop_bh) (struct gfs2_glock gl);
	124	void (go_sync) (struct gfs2_glock gl, int flags);
	125	void (go_inval) (struct gfs2_glock gl, int flags);
	126	int (go_demote_ok) (struct gfs2_glock gl);
	127	int (go_lock) (struct gfs2_holder gh);
	128	void (go_unlock) (struct gfs2_holder gh);
	129	void (go_callback) (struct gfs2_glock gl, unsigned int state);
	130	void (go_greedy) (struct gfs2_glock gl);
	131	int go_type;
	132	};
	133
	134	enum {
	135	/* Actions */
	136	HIF_MUTEX = 0,
	137	HIF_PROMOTE = 1,
	138	HIF_DEMOTE = 2,
	139	HIF_GREEDY = 3,
	140
	141	/* States */
	142	HIF_ALLOCED = 4,
	143	HIF_DEALLOC = 5,
	144	HIF_HOLDER = 6,
	145	HIF_FIRST = 7,
	146	HIF_RECURSE = 8,
	147	HIF_ABORTED = 9,
	148	};
	149
	150	struct gfs2_holder {
	151	struct list_head gh_list;
	152
	153	struct gfs2_glock *gh_gl;
	154	struct task_struct *gh_owner;
	155	unsigned int gh_state;
	156	int gh_flags;
	157
	158	int gh_error;
	159	unsigned long gh_iflags;
	160	struct completion gh_wait;
	161	};
	162
	163	enum {
	164	GLF_PLUG = 0,
	165	GLF_LOCK = 1,
	166	GLF_STICKY = 2,
	167	GLF_PREFETCH = 3,
	168	GLF_SYNC = 4,
	169	GLF_DIRTY = 5,
	170	GLF_SKIP_WAITERS2 = 6,
	171	GLF_GREEDY = 7,
	172	};
	173
	174	struct gfs2_glock {
	175	struct list_head gl_list;
	176	unsigned long gl_flags; /* GLF_... */
	177	struct lm_lockname gl_name;
	178	struct kref gl_ref;
	179
	180	spinlock_t gl_spin;
	181
182	unsigned int gl_state;
183	struct list_head gl_holders;
184	struct list_head gl_waiters1; /* HIF_MUTEX */
185	struct list_head gl_waiters2; /* HIF_DEMOTE, HIF_GREEDY */
186	struct list_head gl_waiters3; /* HIF_PROMOTE */
187
188	struct gfs2_glock_operations *gl_ops;
189
190	struct gfs2_holder *gl_req_gh;
191	gfs2_glop_bh_t gl_req_bh;
192
193	lm_lock_t *gl_lock;
194	char *gl_lvb;
195	atomic_t gl_lvb_count;
196
197	uint64_t gl_vn;
198	unsigned long gl_stamp;
199	void *gl_object;
200
201	struct gfs2_gl_hash_bucket *gl_bucket;
202	struct list_head gl_reclaim;
203
204	struct gfs2_sbd *gl_sbd;
205
206	struct inode *gl_aspace;
207	struct gfs2_log_element gl_le;
208	struct list_head gl_ail_list;
209	atomic_t gl_ail_count;
210	};
211
212	struct gfs2_alloc {
213	/* Quota stuff */
214
215	unsigned int al_qd_num;
216	struct gfs2_quota_data *al_qd[4];
217	struct gfs2_holder al_qd_ghs[4];
218
219	/* Filled in by the caller to gfs2_inplace_reserve() */
220
221	uint32_t al_requested;
222
223	/* Filled in by gfs2_inplace_reserve() */
224
225	char *al_file;
226	unsigned int al_line;
227	struct gfs2_holder al_ri_gh;
228	struct gfs2_holder al_rgd_gh;
229	struct gfs2_rgrpd *al_rgd;
230
231	/* Filled in by gfs2_alloc_() /
232
233	uint32_t al_alloced;
234	};
235
236	enum {
237	GIF_MIN_INIT = 0,
238	GIF_QD_LOCKED = 1,
239	GIF_PAGED = 2,
240	GIF_SW_PAGED = 3,
241	};
242
243	struct gfs2_inode {
244	struct gfs2_inum i_num;
245
246	atomic_t i_count;
247	unsigned long i_flags; /* GIF_... */
248
249	uint64_t i_vn;
250	struct gfs2_dinode i_di;
251
252	struct gfs2_glock *i_gl;
253	struct gfs2_sbd *i_sbd;
254	struct inode *i_vnode;
255
256	struct gfs2_holder i_iopen_gh;
257
258	struct gfs2_alloc i_alloc;
259	uint64_t i_last_rg_alloc;
260
261	spinlock_t i_spin;
262	struct rw_semaphore i_rw_mutex;
263
264	unsigned int i_greedy;
265	unsigned long i_last_pfault;
266
267	struct buffer_head *i_cache[GFS2_MAX_META_HEIGHT];
268	};
269
270	enum {
271	GFF_DID_DIRECT_ALLOC = 0,
272	};
273
274	struct gfs2_file {
275	unsigned long f_flags; /* GFF_... */
276
277	struct semaphore f_fl_mutex;
278	struct gfs2_holder f_fl_gh;
279
280	struct gfs2_inode *f_inode;
281	struct file *f_vfile;
282	};
283
284	struct gfs2_revoke {
285	struct gfs2_log_element rv_le;
286	uint64_t rv_blkno;
287	};
288
289	struct gfs2_revoke_replay {
290	struct list_head rr_list;
291	uint64_t rr_blkno;
292	unsigned int rr_where;
293	};
294
295	enum {
296	ULF_LOCKED = 0,
297	};
298
299	struct gfs2_unlinked {
300	struct list_head ul_list;
301	unsigned int ul_count;
302	struct gfs2_unlinked_tag ul_ut;
303	unsigned long ul_flags; /* ULF_... */
304	unsigned int ul_slot;
305	};
306
307	enum {
308	QDF_USER = 0,
309	QDF_CHANGE = 1,
310	QDF_LOCKED = 2,
311	};
312
313	struct gfs2_quota_data {
314	struct list_head qd_list;
315	unsigned int qd_count;
316
317	uint32_t qd_id;
318	unsigned long qd_flags; /* QDF_... */
319
320	int64_t qd_change;
321	int64_t qd_change_sync;
322
323	unsigned int qd_slot;
324	unsigned int qd_slot_count;
325
326	struct buffer_head *qd_bh;
327	struct gfs2_quota_change *qd_bh_qc;
328	unsigned int qd_bh_count;
329
330	struct gfs2_glock *qd_gl;
331	struct gfs2_quota_lvb qd_qb;
332
333	uint64_t qd_sync_gen;
334	unsigned long qd_last_warn;
335	unsigned long qd_last_touched;
336	};
337
338	struct gfs2_log_buf {
339	struct list_head lb_list;
340	struct buffer_head *lb_bh;
341	struct buffer_head *lb_real;
342	};
343
344	struct gfs2_trans {
345	char *tr_file;
346	unsigned int tr_line;
347
348	unsigned int tr_blocks;
349	unsigned int tr_revokes;
350	unsigned int tr_reserved;
351
352	struct gfs2_holder *tr_t_gh;
353
354	int tr_touched;
355
356	unsigned int tr_num_buf;
357	unsigned int tr_num_buf_new;
358	unsigned int tr_num_buf_rm;
359	struct list_head tr_list_buf;
360
361	unsigned int tr_num_revoke;
362	unsigned int tr_num_revoke_rm;
363	};
364
365	struct gfs2_ail {
366	struct list_head ai_list;
367
368	unsigned int ai_first;
369	struct list_head ai_ail1_list;
370	struct list_head ai_ail2_list;
371
372	uint64_t ai_sync_gen;
373	};
374
375	struct gfs2_jdesc {
376	struct list_head jd_list;
377
378	struct gfs2_inode *jd_inode;
379	unsigned int jd_jid;
380	int jd_dirty;
381
382	unsigned int jd_blocks;
383	};
384
385	#define GFS2_GLOCKD_DEFAULT 1
386	#define GFS2_GLOCKD_MAX 16
387
388	#define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF
389	#define GFS2_QUOTA_OFF 0
390	#define GFS2_QUOTA_ACCOUNT 1
391	#define GFS2_QUOTA_ON 2
392
393	#define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED
394	#define GFS2_DATA_WRITEBACK 1
395	#define GFS2_DATA_ORDERED 2
396
397	struct gfs2_args {
398	char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
399	char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
400	char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
401	int ar_spectator; /* Don't get a journal because we're always RO */
402	int ar_ignore_local_fs; /* Don't optimize even if local_fs is 1 */
403	int ar_localflocks; /* Let the VFS do flock\|fcntl locks for us */
404	int ar_localcaching; /* Local-style caching (dangerous on multihost) */
405	int ar_debug; /* Oops on errors instead of trying to be graceful */
406	int ar_upgrade; /* Upgrade ondisk/multihost format */
407	unsigned int ar_num_glockd; /* Number of glockd threads */
408	int ar_posix_acl; /* Enable posix acls */
409	int ar_quota; /* off/account/on */
410	int ar_suiddir; /* suiddir support */
411	int ar_data; /* ordered/writeback */
412	};
413
414	struct gfs2_tune {
415	spinlock_t gt_spin;
416
417	unsigned int gt_ilimit;
418	unsigned int gt_ilimit_tries;
419	unsigned int gt_ilimit_min;
420	unsigned int gt_demote_secs; /* Cache retention for unheld glock */
421	unsigned int gt_incore_log_blocks;
422	unsigned int gt_log_flush_secs;
423	unsigned int gt_jindex_refresh_secs; /* Check for new journal index */
424
425	unsigned int gt_scand_secs;
426	unsigned int gt_recoverd_secs;
427	unsigned int gt_logd_secs;
428	unsigned int gt_quotad_secs;
429	unsigned int gt_inoded_secs;
430
431	unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
432	unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
433	unsigned int gt_quota_scale_num; /* Numerator */
434	unsigned int gt_quota_scale_den; /* Denominator */
435	unsigned int gt_quota_cache_secs;
436	unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
437	unsigned int gt_atime_quantum; /* Min secs between atime updates */
438	unsigned int gt_new_files_jdata;
439	unsigned int gt_new_files_directio;
440	unsigned int gt_max_atomic_write; /* Split big writes into this size */
441	unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
442	unsigned int gt_lockdump_size;
443	unsigned int gt_stall_secs; /* Detects trouble! */
444	unsigned int gt_complain_secs;
445	unsigned int gt_reclaim_limit; /* Max num of glocks in reclaim list */
446	unsigned int gt_entries_per_readdir;
447	unsigned int gt_prefetch_secs; /* Usage window for prefetched glocks */
448	unsigned int gt_greedy_default;
449	unsigned int gt_greedy_quantum;
450	unsigned int gt_greedy_max;
451	unsigned int gt_statfs_quantum;
452	unsigned int gt_statfs_slow;
453	};
454
455	struct gfs2_gl_hash_bucket {
456	rwlock_t hb_lock;
457	struct list_head hb_list;
458	};
459
460	enum {
461	SDF_JOURNAL_CHECKED = 0,
462	SDF_JOURNAL_LIVE = 1,
463	SDF_SHUTDOWN = 2,
464	SDF_NOATIME = 3,
465	};
466
467	#define GFS2_GL_HASH_SHIFT 13
468	#define GFS2_GL_HASH_SIZE (1 << GFS2_GL_HASH_SHIFT)
469	#define GFS2_GL_HASH_MASK (GFS2_GL_HASH_SIZE - 1)
470	#define GFS2_FSNAME_LEN 256
471
472	struct gfs2_sbd {
473	struct super_block *sd_vfs;
474	struct kobject sd_kobj;
475	unsigned long sd_flags; /* SDF_... */
476	struct gfs2_sb sd_sb;
477
478	/* Constants computed on mount */
479
480	uint32_t sd_fsb2bb;
481	uint32_t sd_fsb2bb_shift;
482	uint32_t sd_diptrs; /* Number of pointers in a dinode */
483	uint32_t sd_inptrs; /* Number of pointers in a indirect block */
484	uint32_t sd_jbsize; /* Size of a journaled data block */
485	uint32_t sd_hash_bsize; /* sizeof(exhash block) */
486	uint32_t sd_hash_bsize_shift;
487	uint32_t sd_hash_ptrs; /* Number of pointers in a hash block */
488	uint32_t sd_ut_per_block;
489	uint32_t sd_qc_per_block;
490	uint32_t sd_max_dirres; /* Max blocks needed to add a directory entry */
491	uint32_t sd_max_height; /* Max height of a file's metadata tree */
492	uint64_t sd_heightsize[GFS2_MAX_META_HEIGHT];
493	uint32_t sd_max_jheight; /* Max height of journaled file's meta tree */
494	uint64_t sd_jheightsize[GFS2_MAX_META_HEIGHT];
495
496	struct gfs2_args sd_args; /* Mount arguments */
497	struct gfs2_tune sd_tune; /* Filesystem tuning structure */
498
499	/* Lock Stuff */
500
501	struct lm_lockstruct sd_lockstruct;
502	struct gfs2_gl_hash_bucket sd_gl_hash[GFS2_GL_HASH_SIZE];
503	struct list_head sd_reclaim_list;
504	spinlock_t sd_reclaim_lock;
505	wait_queue_head_t sd_reclaim_wq;
506	atomic_t sd_reclaim_count;
507	struct gfs2_holder sd_live_gh;
508	struct gfs2_glock *sd_rename_gl;
509	struct gfs2_glock *sd_trans_gl;
510	struct semaphore sd_invalidate_inodes_mutex;
511
512	/* Inode Stuff */
513
514	struct gfs2_inode *sd_master_dir;
515	struct gfs2_inode *sd_jindex;
516	struct gfs2_inode *sd_inum_inode;
517	struct gfs2_inode *sd_statfs_inode;
518	struct gfs2_inode *sd_ir_inode;
519	struct gfs2_inode *sd_sc_inode;
520	struct gfs2_inode *sd_ut_inode;
521	struct gfs2_inode *sd_qc_inode;
522	struct gfs2_inode *sd_rindex;
523	struct gfs2_inode *sd_quota_inode;
524	struct gfs2_inode *sd_root_dir;
525
526	/* Inum stuff */
527
528	struct semaphore sd_inum_mutex;
529
530	/* StatFS stuff */
531
532	spinlock_t sd_statfs_spin;
533	struct semaphore sd_statfs_mutex;
534	struct gfs2_statfs_change sd_statfs_master;
535	struct gfs2_statfs_change sd_statfs_local;
536	unsigned long sd_statfs_sync_time;
537
538	/* Resource group stuff */
539
540	uint64_t sd_rindex_vn;
541	spinlock_t sd_rindex_spin;
542	struct semaphore sd_rindex_mutex;
543	struct list_head sd_rindex_list;
544	struct list_head sd_rindex_mru_list;
545	struct list_head sd_rindex_recent_list;
546	struct gfs2_rgrpd *sd_rindex_forward;
547	unsigned int sd_rgrps;
548
549	/* Journal index stuff */
550
551	struct list_head sd_jindex_list;
552	spinlock_t sd_jindex_spin;
553	struct semaphore sd_jindex_mutex;
554	unsigned int sd_journals;
555	unsigned long sd_jindex_refresh_time;
556
557	struct gfs2_jdesc *sd_jdesc;
558	struct gfs2_holder sd_journal_gh;
559	struct gfs2_holder sd_jinode_gh;
560
561	struct gfs2_holder sd_ir_gh;
562	struct gfs2_holder sd_sc_gh;
563	struct gfs2_holder sd_ut_gh;
564	struct gfs2_holder sd_qc_gh;
565
566	/* Daemon stuff */
567
568	struct task_struct *sd_scand_process;
569	struct task_struct *sd_recoverd_process;
570	struct task_struct *sd_logd_process;
571	struct task_struct *sd_quotad_process;
572	struct task_struct *sd_inoded_process;
573	struct task_struct *sd_glockd_process[GFS2_GLOCKD_MAX];
574	unsigned int sd_glockd_num;
575
576	/* Unlinked inode stuff */
577
578	struct list_head sd_unlinked_list;
579	atomic_t sd_unlinked_count;
580	spinlock_t sd_unlinked_spin;
581	struct semaphore sd_unlinked_mutex;
582
583	unsigned int sd_unlinked_slots;
584	unsigned int sd_unlinked_chunks;
585	unsigned char **sd_unlinked_bitmap;
586
587	/* Quota stuff */
588
589	struct list_head sd_quota_list;
590	atomic_t sd_quota_count;
591	spinlock_t sd_quota_spin;
592	struct semaphore sd_quota_mutex;
593
594	unsigned int sd_quota_slots;
595	unsigned int sd_quota_chunks;
596	unsigned char **sd_quota_bitmap;
597
598	uint64_t sd_quota_sync_gen;
599	unsigned long sd_quota_sync_time;
600
601	/* Log stuff */
602
603	spinlock_t sd_log_lock;
604	atomic_t sd_log_trans_count;
605	wait_queue_head_t sd_log_trans_wq;
606	atomic_t sd_log_flush_count;
607	wait_queue_head_t sd_log_flush_wq;
608
609	unsigned int sd_log_blks_reserved;
610	unsigned int sd_log_commited_buf;
611	unsigned int sd_log_commited_revoke;
612
613	unsigned int sd_log_num_gl;
614	unsigned int sd_log_num_buf;
615	unsigned int sd_log_num_revoke;
616	unsigned int sd_log_num_rg;
617	unsigned int sd_log_num_databuf;
618	struct list_head sd_log_le_gl;
619	struct list_head sd_log_le_buf;
620	struct list_head sd_log_le_revoke;
621	struct list_head sd_log_le_rg;
622	struct list_head sd_log_le_databuf;
623
624	unsigned int sd_log_blks_free;
625	struct list_head sd_log_blks_list;
626	wait_queue_head_t sd_log_blks_wait;
627
628	uint64_t sd_log_sequence;
629	unsigned int sd_log_head;
630	unsigned int sd_log_tail;
631	uint64_t sd_log_wraps;
632	int sd_log_idle;
633
634	unsigned long sd_log_flush_time;
635	struct semaphore sd_log_flush_lock;
636	struct list_head sd_log_flush_list;
637
638	unsigned int sd_log_flush_head;
639	uint64_t sd_log_flush_wrapped;
640
641	struct list_head sd_ail1_list;
642	struct list_head sd_ail2_list;
643	uint64_t sd_ail_sync_gen;
644
645	/* Replay stuff */
646
647	struct list_head sd_revoke_list;
648	unsigned int sd_replay_tail;
649
650	unsigned int sd_found_blocks;
651	unsigned int sd_found_revokes;
652	unsigned int sd_replayed_blocks;
653
654	/* For quiescing the filesystem */
655
656	struct gfs2_holder sd_freeze_gh;
657	struct semaphore sd_freeze_lock;
658	unsigned int sd_freeze_count;
659
660	/* Counters */
661
662	atomic_t sd_glock_count;
663	atomic_t sd_glock_held_count;
664	atomic_t sd_inode_count;
665	atomic_t sd_bufdata_count;
666
667	atomic_t sd_fh2dentry_misses;
668	atomic_t sd_reclaimed;
669	atomic_t sd_log_flush_incore;
670	atomic_t sd_log_flush_ondisk;
671
672	atomic_t sd_glock_nq_calls;
673	atomic_t sd_glock_dq_calls;
674	atomic_t sd_glock_prefetch_calls;
675	atomic_t sd_lm_lock_calls;
676	atomic_t sd_lm_unlock_calls;
677	atomic_t sd_lm_callbacks;
678
679	atomic_t sd_ops_address;
680	atomic_t sd_ops_dentry;
681	atomic_t sd_ops_export;
682	atomic_t sd_ops_file;
683	atomic_t sd_ops_inode;
684	atomic_t sd_ops_super;
685	atomic_t sd_ops_vm;
686
687	char sd_fsname[GFS2_FSNAME_LEN];
688	char sd_table_name[GFS2_FSNAME_LEN];
689	char sd_proto_name[GFS2_FSNAME_LEN];
690
691	/* Debugging crud */
692
693	unsigned long sd_last_warning;
694	};
695
696	#endif /* __INCORE_DOT_H__ */
697