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

/*
 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
 * Copyright (C) 2004-2006 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 version 2.
 */

#ifndef __INCORE_DOT_H__
#define __INCORE_DOT_H__

#include <linux/fs.h>

#define DIO_WAIT	0x00000010
#define DIO_METADATA	0x00000020
#define DIO_ALL		0x00000100

struct gfs2_log_operations;
struct gfs2_log_element;
struct gfs2_holder;
struct gfs2_glock;
struct gfs2_quota_data;
struct gfs2_trans;
struct gfs2_ail;
struct gfs2_jdesc;
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_host *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);
	const char *lo_name;
};

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

struct gfs2_bitmap {
	struct buffer_head *bi_bh;
	char *bi_clone;
	u32 bi_offset;
	u32 bi_start;
	u32 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_host rd_ri;
	struct gfs2_rgrp_host rd_rg;
	u64 rd_rg_vn;
	struct gfs2_bitmap *rd_bits;
	unsigned int rd_bh_count;
	struct mutex rd_mutex;
	u32 rd_free_clone;
	struct gfs2_log_element rd_le;
	u32 rd_last_alloc_data;
	u32 rd_last_alloc_meta;
	struct gfs2_sbd *rd_sbd;
};

enum gfs2_state_bits {
	BH_Pinned = BH_PrivateStart,
	BH_Escaped = BH_PrivateStart + 1,
};

BUFFER_FNS(Pinned, pinned)
TAS_BUFFER_FNS(Pinned, pinned)
BUFFER_FNS(Escaped, escaped)
TAS_BUFFER_FNS(Escaped, escaped)

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);
	void (*go_xmote_bh) (struct gfs2_glock *gl);
	void (*go_drop_th) (struct gfs2_glock *gl);
	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);
	const int go_type;
};

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

	/* States */
	HIF_ALLOCED		= 4,
	HIF_DEALLOC		= 5,
	HIF_HOLDER		= 6,
	HIF_FIRST		= 7,
	HIF_ABORTED		= 9,
	HIF_WAIT		= 10,
};

struct gfs2_holder {
	struct list_head gh_list;

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

	int gh_error;
	unsigned long gh_iflags;
	unsigned long gh_ip;
};

enum {
	GLF_LOCK		= 1,
	GLF_STICKY		= 2,
	GLF_DIRTY		= 5,
	GLF_SKIP_WAITERS2	= 6,
};

struct gfs2_glock {
	struct hlist_node gl_list;
	unsigned long gl_flags;		/* GLF_... */
	struct lm_lockname gl_name;
	atomic_t gl_ref;

	spinlock_t gl_spin;

	unsigned int gl_state;
	unsigned int gl_hash;
	struct task_struct *gl_owner;
	unsigned long gl_ip;
	struct list_head gl_holders;
	struct list_head gl_waiters1;	/* HIF_MUTEX */
	struct list_head gl_waiters2;	/* HIF_DEMOTE */
	struct list_head gl_waiters3;	/* HIF_PROMOTE */

	const struct gfs2_glock_operations *gl_ops;

	struct gfs2_holder *gl_req_gh;
	gfs2_glop_bh_t gl_req_bh;

	void *gl_lock;
	char *gl_lvb;
	atomic_t gl_lvb_count;

	u64 gl_vn;
	unsigned long gl_stamp;
	void *gl_object;

	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 */

	struct gfs2_quota_data *al_qd[2*MAXQUOTAS];
	struct gfs2_holder al_qd_ghs[2*MAXQUOTAS];
	unsigned int al_qd_num;

	u32 al_requested; /* Filled in by caller of gfs2_inplace_reserve() */
	u32 al_alloced; /* Filled in by gfs2_alloc_*() */

	/* Filled in by gfs2_inplace_reserve() */

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

};

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

struct gfs2_inode {
	struct inode i_inode;
	struct gfs2_inum_host i_num;

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

	struct gfs2_dinode_host i_di; /* To be replaced by ref to block */

	struct gfs2_glock *i_gl; /* Move into i_gh? */
	struct gfs2_holder i_iopen_gh;
	struct gfs2_holder i_gh; /* for prepare/commit_write only */
	struct gfs2_alloc i_alloc;
	u64 i_last_rg_alloc;

	spinlock_t i_spin;
	struct rw_semaphore i_rw_mutex;
	unsigned long i_last_pfault;

	struct buffer_head *i_cache[GFS2_MAX_META_HEIGHT];
};

/*
 * Since i_inode is the first element of struct gfs2_inode,
 * this is effectively a cast.
 */
static inline struct gfs2_inode *GFS2_I(struct inode *inode)
{
	return container_of(inode, struct gfs2_inode, i_inode);
}

/* To be removed? */
static inline struct gfs2_sbd *GFS2_SB(struct inode *inode)
{
	return inode->i_sb->s_fs_info;
}

enum {
	GFF_DID_DIRECT_ALLOC	= 0,
	GFF_EXLOCK = 1,
};

struct gfs2_file {
	unsigned long f_flags;		/* GFF_... */
	struct mutex f_fl_mutex;
	struct gfs2_holder f_fl_gh;
};

struct gfs2_revoke {
	struct gfs2_log_element rv_le;
	u64 rv_blkno;
};

struct gfs2_revoke_replay {
	struct list_head rr_list;
	u64 rr_blkno;
	unsigned int rr_where;
};

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

struct gfs2_quota_lvb {
        __be32 qb_magic;
        u32 __pad;
        __be64 qb_limit;      /* Hard limit of # blocks to alloc */
        __be64 qb_warn;       /* Warn user when alloc is above this # */
        __be64 qb_value;       /* Current # blocks allocated */
};

struct gfs2_quota_data {
	struct list_head qd_list;
	unsigned int qd_count;

	u32 qd_id;
	unsigned long qd_flags;		/* QDF_... */

	s64 qd_change;
	s64 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;

	u64 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 {
	unsigned long tr_ip;

	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;

	u64 ai_sync_gen;
};

struct gfs2_jdesc {
	struct list_head jd_list;

	struct 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_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_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_statfs_quantum;
	unsigned int gt_statfs_slow;
};

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

#define GFS2_FSNAME_LEN		256

struct gfs2_sbd {
	struct super_block *sd_vfs;
	struct super_block *sd_vfs_meta;
	struct kobject sd_kobj;
	unsigned long sd_flags;	/* SDF_... */
	struct gfs2_sb_host sd_sb;

	/* Constants computed on mount */

	u32 sd_fsb2bb;
	u32 sd_fsb2bb_shift;
	u32 sd_diptrs;	/* Number of pointers in a dinode */
	u32 sd_inptrs;	/* Number of pointers in a indirect block */
	u32 sd_jbsize;	/* Size of a journaled data block */
	u32 sd_hash_bsize;	/* sizeof(exhash block) */
	u32 sd_hash_bsize_shift;
	u32 sd_hash_ptrs;	/* Number of pointers in a hash block */
	u32 sd_qc_per_block;
	u32 sd_max_dirres;	/* Max blocks needed to add a directory entry */
	u32 sd_max_height;	/* Max height of a file's metadata tree */
	u64 sd_heightsize[GFS2_MAX_META_HEIGHT];
	u32 sd_max_jheight; /* Max height of journaled file's meta tree */
	u64 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 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;

	/* Inode Stuff */

	struct inode *sd_master_dir;
	struct inode *sd_jindex;
	struct inode *sd_inum_inode;
	struct inode *sd_statfs_inode;
	struct inode *sd_ir_inode;
	struct inode *sd_sc_inode;
	struct inode *sd_qc_inode;
	struct inode *sd_rindex;
	struct inode *sd_quota_inode;

	/* Inum stuff */

	struct mutex sd_inum_mutex;

	/* StatFS stuff */

	spinlock_t sd_statfs_spin;
	struct mutex sd_statfs_mutex;
	struct gfs2_statfs_change_host sd_statfs_master;
	struct gfs2_statfs_change_host sd_statfs_local;
	unsigned long sd_statfs_sync_time;

	/* Resource group stuff */

	u64 sd_rindex_vn;
	spinlock_t sd_rindex_spin;
	struct mutex 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 mutex 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_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_glockd_process[GFS2_GLOCKD_MAX];
	unsigned int sd_glockd_num;

	/* Quota stuff */

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

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

	u64 sd_quota_sync_gen;
	unsigned long sd_quota_sync_time;

	/* Log stuff */

	spinlock_t sd_log_lock;

	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;
	unsigned int sd_log_num_jdata;
	unsigned int sd_log_num_hdrs;

	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 mutex sd_log_reserve_mutex;

	u64 sd_log_sequence;
	unsigned int sd_log_head;
	unsigned int sd_log_tail;
	int sd_log_idle;

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

	unsigned int sd_log_flush_head;
	u64 sd_log_flush_wrapped;

	struct list_head sd_ail1_list;
	struct list_head sd_ail2_list;
	u64 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 mutex 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_reclaimed;

	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;
	struct vfsmount *sd_gfs2mnt;
	struct dentry *debugfs_dentry; /* for debugfs */
};

#endif /* __INCORE_DOT_H__ */
Commit	Line	Data
b3b94faa DT	1	/*
b3b94faa DT	2	* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3a8a9a10	3	* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
b3b94faa DT	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
e9fc2aa0	7	* of the GNU General Public License version 2.
b3b94faa DT	8	*/
	9
	10	#ifndef __INCORE_DOT_H__
	11	#define __INCORE_DOT_H__
	12
f2f7ba52 SW	13	#include <linux/fs.h>
f2f7ba52 SW	14
b3b94faa DT	15	#define DIO_WAIT 0x00000010
b3b94faa DT	16	#define DIO_METADATA 0x00000020
b3b94faa DT	17	#define DIO_ALL 0x00000100
	18
	19	struct gfs2_log_operations;
	20	struct gfs2_log_element;
b3b94faa DT	21	struct gfs2_holder;
b3b94faa DT	22	struct gfs2_glock;
b3b94faa	23	struct gfs2_quota_data;
b3b94faa DT	24	struct gfs2_trans;
	25	struct gfs2_ail;
	26	struct gfs2_jdesc;
b3b94faa DT	27	struct gfs2_sbd;
	28
	29	typedef void (gfs2_glop_bh_t) (struct gfs2_glock gl, unsigned int ret);
	30
	31	/*
	32	* Structure of operations that are associated with each
	33	* type of element in the log.
	34	*/
	35
	36	struct gfs2_log_operations {
	37	void (lo_add) (struct gfs2_sbd sdp, struct gfs2_log_element *le);
	38	void (lo_incore_commit) (struct gfs2_sbd sdp, struct gfs2_trans *tr);
	39	void (lo_before_commit) (struct gfs2_sbd sdp);
	40	void (lo_after_commit) (struct gfs2_sbd sdp, struct gfs2_ail *ai);
	41	void (lo_before_scan) (struct gfs2_jdesc jd,
55167622	42	struct gfs2_log_header_host *head, int pass);
b3b94faa DT	43	int (lo_scan_elements) (struct gfs2_jdesc jd, unsigned int start,
	44	struct gfs2_log_descriptor ld, __be64 ptr,
	45	int pass);
	46	void (lo_after_scan) (struct gfs2_jdesc jd, int error, int pass);
b09e593d	47	const char *lo_name;
b3b94faa DT	48	};
	49
	50	struct gfs2_log_element {
	51	struct list_head le_list;
b09e593d	52	const struct gfs2_log_operations *le_ops;
b3b94faa DT	53	};
	54
	55	struct gfs2_bitmap {
	56	struct buffer_head *bi_bh;
	57	char *bi_clone;
cd915493 SW	58	u32 bi_offset;
	59	u32 bi_start;
	60	u32 bi_len;
b3b94faa DT	61	};
	62
	63	struct gfs2_rgrpd {
	64	struct list_head rd_list; /* Link with superblock */
	65	struct list_head rd_list_mru;
	66	struct list_head rd_recent; /* Recently used rgrps */
	67	struct gfs2_glock rd_gl; / Glock for this rgrp */
1e81c4c3	68	struct gfs2_rindex_host rd_ri;
68826664	69	struct gfs2_rgrp_host rd_rg;
cd915493	70	u64 rd_rg_vn;
b3b94faa DT	71	struct gfs2_bitmap *rd_bits;
b3b94faa DT	72	unsigned int rd_bh_count;
f55ab26a	73	struct mutex rd_mutex;
cd915493	74	u32 rd_free_clone;
b3b94faa	75	struct gfs2_log_element rd_le;
cd915493 SW	76	u32 rd_last_alloc_data;
cd915493 SW	77	u32 rd_last_alloc_meta;
b3b94faa DT	78	struct gfs2_sbd *rd_sbd;
	79	};
	80
	81	enum gfs2_state_bits {
	82	BH_Pinned = BH_PrivateStart,
f42faf4f	83	BH_Escaped = BH_PrivateStart + 1,
b3b94faa DT	84	};
	85
	86	BUFFER_FNS(Pinned, pinned)
	87	TAS_BUFFER_FNS(Pinned, pinned)
f42faf4f SW	88	BUFFER_FNS(Escaped, escaped)
f42faf4f SW	89	TAS_BUFFER_FNS(Escaped, escaped)
b3b94faa DT	90
	91	struct gfs2_bufdata {
	92	struct buffer_head *bd_bh;
	93	struct gfs2_glock *bd_gl;
	94
	95	struct list_head bd_list_tr;
	96	struct gfs2_log_element bd_le;
	97
	98	struct gfs2_ail *bd_ail;
	99	struct list_head bd_ail_st_list;
	100	struct list_head bd_ail_gl_list;
	101	};
	102
b3b94faa	103	struct gfs2_glock_operations {
b5d32bea	104	void (go_xmote_th) (struct gfs2_glock gl);
1a14d3a6 SW	105	void (go_xmote_bh) (struct gfs2_glock gl);
1a14d3a6 SW	106	void (go_drop_th) (struct gfs2_glock gl);
1a14d3a6 SW	107	void (go_inval) (struct gfs2_glock gl, int flags);
	108	int (go_demote_ok) (struct gfs2_glock gl);
	109	int (go_lock) (struct gfs2_holder gh);
	110	void (go_unlock) (struct gfs2_holder gh);
8fb4b536	111	const int go_type;
b3b94faa DT	112	};
	113
	114	enum {
	115	/* Actions */
	116	HIF_MUTEX = 0,
	117	HIF_PROMOTE = 1,
	118	HIF_DEMOTE = 2,
b3b94faa DT	119
	120	/* States */
	121	HIF_ALLOCED = 4,
	122	HIF_DEALLOC = 5,
	123	HIF_HOLDER = 6,
	124	HIF_FIRST = 7,
b3b94faa	125	HIF_ABORTED = 9,
fee852e3	126	HIF_WAIT = 10,
b3b94faa DT	127	};
	128
	129	struct gfs2_holder {
	130	struct list_head gh_list;
	131
	132	struct gfs2_glock *gh_gl;
	133	struct task_struct *gh_owner;
	134	unsigned int gh_state;
fe1bdedc	135	unsigned gh_flags;
b3b94faa DT	136
b3b94faa DT	137	int gh_error;
695165df	138	unsigned long gh_iflags;
d0dc80db	139	unsigned long gh_ip;
b3b94faa DT	140	};
	141
	142	enum {
b3b94faa DT	143	GLF_LOCK = 1,
b3b94faa DT	144	GLF_STICKY = 2,
b3b94faa DT	145	GLF_DIRTY = 5,
b3b94faa DT	146	GLF_SKIP_WAITERS2 = 6,
b3b94faa DT	147	};
	148
	149	struct gfs2_glock {
b6397893	150	struct hlist_node gl_list;
b3b94faa DT	151	unsigned long gl_flags; /* GLF_... */
b3b94faa DT	152	struct lm_lockname gl_name;
16feb9fe	153	atomic_t gl_ref;
b3b94faa DT	154
	155	spinlock_t gl_spin;
	156
	157	unsigned int gl_state;
37b2fa6a	158	unsigned int gl_hash;
320dd101 SW	159	struct task_struct *gl_owner;
320dd101 SW	160	unsigned long gl_ip;
b3b94faa DT	161	struct list_head gl_holders;
b3b94faa DT	162	struct list_head gl_waiters1; /* HIF_MUTEX */
e5dab552	163	struct list_head gl_waiters2; /* HIF_DEMOTE */
b3b94faa DT	164	struct list_head gl_waiters3; /* HIF_PROMOTE */
b3b94faa DT	165
8fb4b536	166	const struct gfs2_glock_operations *gl_ops;
b3b94faa DT	167
	168	struct gfs2_holder *gl_req_gh;
	169	gfs2_glop_bh_t gl_req_bh;
	170
9b47c11d	171	void *gl_lock;
b3b94faa DT	172	char *gl_lvb;
	173	atomic_t gl_lvb_count;
	174
cd915493	175	u64 gl_vn;
b3b94faa DT	176	unsigned long gl_stamp;
	177	void *gl_object;
	178
b3b94faa DT	179	struct list_head gl_reclaim;
	180
	181	struct gfs2_sbd *gl_sbd;
	182
	183	struct inode *gl_aspace;
	184	struct gfs2_log_element gl_le;
	185	struct list_head gl_ail_list;
	186	atomic_t gl_ail_count;
	187	};
	188
	189	struct gfs2_alloc {
	190	/* Quota stuff */
	191
e9fc2aa0 SW	192	struct gfs2_quota_data al_qd[2MAXQUOTAS];
e9fc2aa0 SW	193	struct gfs2_holder al_qd_ghs[2*MAXQUOTAS];
6b61b072	194	unsigned int al_qd_num;
b3b94faa	195
6b61b072 SW	196	u32 al_requested; /* Filled in by caller of gfs2_inplace_reserve() */
6b61b072 SW	197	u32 al_alloced; /* Filled in by gfs2_alloc_() /
b3b94faa DT	198
	199	/* Filled in by gfs2_inplace_reserve() */
	200
b3b94faa	201	unsigned int al_line;
6b61b072	202	char *al_file;
b3b94faa DT	203	struct gfs2_holder al_ri_gh;
	204	struct gfs2_holder al_rgd_gh;
	205	struct gfs2_rgrpd *al_rgd;
	206
b3b94faa DT	207	};
	208
	209	enum {
bfded27b	210	GIF_INVALID = 0,
b3b94faa DT	211	GIF_QD_LOCKED = 1,
	212	GIF_PAGED = 2,
	213	GIF_SW_PAGED = 3,
	214	};
	215
	216	struct gfs2_inode {
320dd101	217	struct inode i_inode;
629a21e7	218	struct gfs2_inum_host i_num;
b3b94faa	219
b3b94faa DT	220	unsigned long i_flags; /* GIF_... */
b3b94faa DT	221
5c6edb57	222	struct gfs2_dinode_host i_di; /* To be replaced by ref to block */
b3b94faa	223
feaa7bba	224	struct gfs2_glock i_gl; / Move into i_gh? */
b3b94faa	225	struct gfs2_holder i_iopen_gh;
f42faf4f	226	struct gfs2_holder i_gh; /* for prepare/commit_write only */
b3b94faa	227	struct gfs2_alloc i_alloc;
cd915493	228	u64 i_last_rg_alloc;
b3b94faa DT	229
	230	spinlock_t i_spin;
	231	struct rw_semaphore i_rw_mutex;
b3b94faa DT	232	unsigned long i_last_pfault;
	233
	234	struct buffer_head *i_cache[GFS2_MAX_META_HEIGHT];
	235	};
	236
feaa7bba SW	237	/*
	238	* Since i_inode is the first element of struct gfs2_inode,
	239	* this is effectively a cast.
	240	*/
320dd101 SW	241	static inline struct gfs2_inode GFS2_I(struct inode inode)
	242	{
	243	return container_of(inode, struct gfs2_inode, i_inode);
	244	}
	245
feaa7bba SW	246	/* To be removed? */
	247	static inline struct gfs2_sbd GFS2_SB(struct inode inode)
	248	{
	249	return inode->i_sb->s_fs_info;
	250	}
	251
b3b94faa DT	252	enum {
b3b94faa DT	253	GFF_DID_DIRECT_ALLOC = 0,
59a1cc6b	254	GFF_EXLOCK = 1,
b3b94faa DT	255	};
	256
	257	struct gfs2_file {
	258	unsigned long f_flags; /* GFF_... */
f55ab26a	259	struct mutex f_fl_mutex;
b3b94faa	260	struct gfs2_holder f_fl_gh;
b3b94faa DT	261	};
	262
	263	struct gfs2_revoke {
	264	struct gfs2_log_element rv_le;
cd915493	265	u64 rv_blkno;
b3b94faa DT	266	};
	267
	268	struct gfs2_revoke_replay {
	269	struct list_head rr_list;
cd915493	270	u64 rr_blkno;
b3b94faa DT	271	unsigned int rr_where;
	272	};
	273
b3b94faa DT	274	enum {
	275	QDF_USER = 0,
	276	QDF_CHANGE = 1,
	277	QDF_LOCKED = 2,
	278	};
	279
5c676f6d	280	struct gfs2_quota_lvb {
e9fc2aa0 SW	281	__be32 qb_magic;
	282	u32 __pad;
	283	__be64 qb_limit; /* Hard limit of # blocks to alloc */
	284	__be64 qb_warn; /* Warn user when alloc is above this # */
	285	__be64 qb_value; /* Current # blocks allocated */
5c676f6d SW	286	};
5c676f6d SW	287
b3b94faa DT	288	struct gfs2_quota_data {
	289	struct list_head qd_list;
	290	unsigned int qd_count;
	291
cd915493	292	u32 qd_id;
b3b94faa DT	293	unsigned long qd_flags; /* QDF_... */
b3b94faa DT	294
cd915493 SW	295	s64 qd_change;
cd915493 SW	296	s64 qd_change_sync;
b3b94faa DT	297
	298	unsigned int qd_slot;
	299	unsigned int qd_slot_count;
	300
	301	struct buffer_head *qd_bh;
	302	struct gfs2_quota_change *qd_bh_qc;
	303	unsigned int qd_bh_count;
	304
	305	struct gfs2_glock *qd_gl;
	306	struct gfs2_quota_lvb qd_qb;
	307
cd915493	308	u64 qd_sync_gen;
b3b94faa DT	309	unsigned long qd_last_warn;
	310	unsigned long qd_last_touched;
	311	};
	312
	313	struct gfs2_log_buf {
	314	struct list_head lb_list;
	315	struct buffer_head *lb_bh;
	316	struct buffer_head *lb_real;
	317	};
	318
	319	struct gfs2_trans {
d0dc80db	320	unsigned long tr_ip;
b3b94faa DT	321
	322	unsigned int tr_blocks;
	323	unsigned int tr_revokes;
	324	unsigned int tr_reserved;
	325
e317ffcb	326	struct gfs2_holder tr_t_gh;
b3b94faa DT	327
	328	int tr_touched;
	329
	330	unsigned int tr_num_buf;
	331	unsigned int tr_num_buf_new;
	332	unsigned int tr_num_buf_rm;
	333	struct list_head tr_list_buf;
	334
	335	unsigned int tr_num_revoke;
	336	unsigned int tr_num_revoke_rm;
	337	};
	338
	339	struct gfs2_ail {
	340	struct list_head ai_list;
	341
	342	unsigned int ai_first;
	343	struct list_head ai_ail1_list;
	344	struct list_head ai_ail2_list;
	345
cd915493	346	u64 ai_sync_gen;
b3b94faa DT	347	};
	348
	349	struct gfs2_jdesc {
	350	struct list_head jd_list;
	351
7359a19c	352	struct inode *jd_inode;
b3b94faa DT	353	unsigned int jd_jid;
	354	int jd_dirty;
	355
	356	unsigned int jd_blocks;
	357	};
	358
	359	#define GFS2_GLOCKD_DEFAULT 1
	360	#define GFS2_GLOCKD_MAX 16
	361
	362	#define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF
	363	#define GFS2_QUOTA_OFF 0
	364	#define GFS2_QUOTA_ACCOUNT 1
	365	#define GFS2_QUOTA_ON 2
	366
	367	#define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED
	368	#define GFS2_DATA_WRITEBACK 1
	369	#define GFS2_DATA_ORDERED 2
	370
	371	struct gfs2_args {
	372	char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
	373	char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
	374	char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
	375	int ar_spectator; /* Don't get a journal because we're always RO */
	376	int ar_ignore_local_fs; /* Don't optimize even if local_fs is 1 */
	377	int ar_localflocks; /* Let the VFS do flock\|fcntl locks for us */
	378	int ar_localcaching; /* Local-style caching (dangerous on multihost) */
	379	int ar_debug; /* Oops on errors instead of trying to be graceful */
	380	int ar_upgrade; /* Upgrade ondisk/multihost format */
	381	unsigned int ar_num_glockd; /* Number of glockd threads */
	382	int ar_posix_acl; /* Enable posix acls */
	383	int ar_quota; /* off/account/on */
	384	int ar_suiddir; /* suiddir support */
	385	int ar_data; /* ordered/writeback */
	386	};
	387
	388	struct gfs2_tune {
	389	spinlock_t gt_spin;
	390
	391	unsigned int gt_ilimit;
	392	unsigned int gt_ilimit_tries;
	393	unsigned int gt_ilimit_min;
	394	unsigned int gt_demote_secs; /* Cache retention for unheld glock */
	395	unsigned int gt_incore_log_blocks;
	396	unsigned int gt_log_flush_secs;
	397	unsigned int gt_jindex_refresh_secs; /* Check for new journal index */
	398
	399	unsigned int gt_scand_secs;
	400	unsigned int gt_recoverd_secs;
	401	unsigned int gt_logd_secs;
	402	unsigned int gt_quotad_secs;
b3b94faa DT	403
	404	unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
	405	unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
	406	unsigned int gt_quota_scale_num; /* Numerator */
	407	unsigned int gt_quota_scale_den; /* Denominator */
	408	unsigned int gt_quota_cache_secs;
	409	unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
	410	unsigned int gt_atime_quantum; /* Min secs between atime updates */
	411	unsigned int gt_new_files_jdata;
	412	unsigned int gt_new_files_directio;
b3b94faa DT	413	unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
	414	unsigned int gt_lockdump_size;
	415	unsigned int gt_stall_secs; /* Detects trouble! */
	416	unsigned int gt_complain_secs;
	417	unsigned int gt_reclaim_limit; /* Max num of glocks in reclaim list */
b3b94faa DT	418	unsigned int gt_statfs_quantum;
	419	unsigned int gt_statfs_slow;
	420	};
	421
b3b94faa DT	422	enum {
	423	SDF_JOURNAL_CHECKED = 0,
	424	SDF_JOURNAL_LIVE = 1,
	425	SDF_SHUTDOWN = 2,
	426	SDF_NOATIME = 3,
	427	};
	428
b3b94faa DT	429	#define GFS2_FSNAME_LEN 256
	430
	431	struct gfs2_sbd {
	432	struct super_block *sd_vfs;
86384605	433	struct super_block *sd_vfs_meta;
b3b94faa DT	434	struct kobject sd_kobj;
b3b94faa DT	435	unsigned long sd_flags; /* SDF_... */
f50dfaf7	436	struct gfs2_sb_host sd_sb;
b3b94faa DT	437
	438	/* Constants computed on mount */
	439
cd915493 SW	440	u32 sd_fsb2bb;
	441	u32 sd_fsb2bb_shift;
	442	u32 sd_diptrs; /* Number of pointers in a dinode */
	443	u32 sd_inptrs; /* Number of pointers in a indirect block */
	444	u32 sd_jbsize; /* Size of a journaled data block */
	445	u32 sd_hash_bsize; /* sizeof(exhash block) */
	446	u32 sd_hash_bsize_shift;
	447	u32 sd_hash_ptrs; /* Number of pointers in a hash block */
	448	u32 sd_qc_per_block;
	449	u32 sd_max_dirres; /* Max blocks needed to add a directory entry */
	450	u32 sd_max_height; /* Max height of a file's metadata tree */
	451	u64 sd_heightsize[GFS2_MAX_META_HEIGHT];
	452	u32 sd_max_jheight; /* Max height of journaled file's meta tree */
	453	u64 sd_jheightsize[GFS2_MAX_META_HEIGHT];
b3b94faa DT	454
	455	struct gfs2_args sd_args; /* Mount arguments */
	456	struct gfs2_tune sd_tune; /* Filesystem tuning structure */
	457
	458	/* Lock Stuff */
	459
	460	struct lm_lockstruct sd_lockstruct;
b3b94faa DT	461	struct list_head sd_reclaim_list;
	462	spinlock_t sd_reclaim_lock;
	463	wait_queue_head_t sd_reclaim_wq;
	464	atomic_t sd_reclaim_count;
	465	struct gfs2_holder sd_live_gh;
	466	struct gfs2_glock *sd_rename_gl;
	467	struct gfs2_glock *sd_trans_gl;
b3b94faa DT	468
	469	/* Inode Stuff */
	470
f42faf4f SW	471	struct inode *sd_master_dir;
	472	struct inode *sd_jindex;
	473	struct inode *sd_inum_inode;
	474	struct inode *sd_statfs_inode;
	475	struct inode *sd_ir_inode;
	476	struct inode *sd_sc_inode;
f42faf4f SW	477	struct inode *sd_qc_inode;
	478	struct inode *sd_rindex;
	479	struct inode *sd_quota_inode;
b3b94faa DT	480
	481	/* Inum stuff */
	482
f55ab26a	483	struct mutex sd_inum_mutex;
b3b94faa DT	484
	485	/* StatFS stuff */
	486
	487	spinlock_t sd_statfs_spin;
f55ab26a	488	struct mutex sd_statfs_mutex;
bd209cc0 AV	489	struct gfs2_statfs_change_host sd_statfs_master;
bd209cc0 AV	490	struct gfs2_statfs_change_host sd_statfs_local;
b3b94faa DT	491	unsigned long sd_statfs_sync_time;
	492
	493	/* Resource group stuff */
	494
cd915493	495	u64 sd_rindex_vn;
b3b94faa	496	spinlock_t sd_rindex_spin;
f55ab26a	497	struct mutex sd_rindex_mutex;
b3b94faa DT	498	struct list_head sd_rindex_list;
	499	struct list_head sd_rindex_mru_list;
	500	struct list_head sd_rindex_recent_list;
	501	struct gfs2_rgrpd *sd_rindex_forward;
	502	unsigned int sd_rgrps;
	503
	504	/* Journal index stuff */
	505
	506	struct list_head sd_jindex_list;
	507	spinlock_t sd_jindex_spin;
f55ab26a	508	struct mutex sd_jindex_mutex;
b3b94faa DT	509	unsigned int sd_journals;
	510	unsigned long sd_jindex_refresh_time;
	511
	512	struct gfs2_jdesc *sd_jdesc;
	513	struct gfs2_holder sd_journal_gh;
	514	struct gfs2_holder sd_jinode_gh;
	515
	516	struct gfs2_holder sd_ir_gh;
	517	struct gfs2_holder sd_sc_gh;
b3b94faa DT	518	struct gfs2_holder sd_qc_gh;
	519
	520	/* Daemon stuff */
	521
	522	struct task_struct *sd_scand_process;
	523	struct task_struct *sd_recoverd_process;
	524	struct task_struct *sd_logd_process;
	525	struct task_struct *sd_quotad_process;
b3b94faa DT	526	struct task_struct *sd_glockd_process[GFS2_GLOCKD_MAX];
	527	unsigned int sd_glockd_num;
	528
b3b94faa DT	529	/* Quota stuff */
	530
	531	struct list_head sd_quota_list;
	532	atomic_t sd_quota_count;
	533	spinlock_t sd_quota_spin;
f55ab26a	534	struct mutex sd_quota_mutex;
b3b94faa DT	535
	536	unsigned int sd_quota_slots;
	537	unsigned int sd_quota_chunks;
	538	unsigned char **sd_quota_bitmap;
	539
cd915493	540	u64 sd_quota_sync_gen;
b3b94faa DT	541	unsigned long sd_quota_sync_time;
	542
	543	/* Log stuff */
	544
	545	spinlock_t sd_log_lock;
b3b94faa DT	546
	547	unsigned int sd_log_blks_reserved;
	548	unsigned int sd_log_commited_buf;
	549	unsigned int sd_log_commited_revoke;
	550
	551	unsigned int sd_log_num_gl;
	552	unsigned int sd_log_num_buf;
	553	unsigned int sd_log_num_revoke;
	554	unsigned int sd_log_num_rg;
	555	unsigned int sd_log_num_databuf;
f42faf4f	556	unsigned int sd_log_num_jdata;
b09e593d	557	unsigned int sd_log_num_hdrs;
f42faf4f	558
b3b94faa DT	559	struct list_head sd_log_le_gl;
	560	struct list_head sd_log_le_buf;
	561	struct list_head sd_log_le_revoke;
	562	struct list_head sd_log_le_rg;
	563	struct list_head sd_log_le_databuf;
	564
	565	unsigned int sd_log_blks_free;
71b86f56	566	struct mutex sd_log_reserve_mutex;
b3b94faa	567
cd915493	568	u64 sd_log_sequence;
b3b94faa DT	569	unsigned int sd_log_head;
b3b94faa DT	570	unsigned int sd_log_tail;
b3b94faa DT	571	int sd_log_idle;
	572
	573	unsigned long sd_log_flush_time;
484adff8	574	struct rw_semaphore sd_log_flush_lock;
b3b94faa DT	575	struct list_head sd_log_flush_list;
	576
	577	unsigned int sd_log_flush_head;
cd915493	578	u64 sd_log_flush_wrapped;
b3b94faa DT	579
	580	struct list_head sd_ail1_list;
	581	struct list_head sd_ail2_list;
cd915493	582	u64 sd_ail_sync_gen;
b3b94faa DT	583
	584	/* Replay stuff */
	585
	586	struct list_head sd_revoke_list;
	587	unsigned int sd_replay_tail;
	588
	589	unsigned int sd_found_blocks;
	590	unsigned int sd_found_revokes;
	591	unsigned int sd_replayed_blocks;
	592
	593	/* For quiescing the filesystem */
	594
	595	struct gfs2_holder sd_freeze_gh;
f55ab26a	596	struct mutex sd_freeze_lock;
b3b94faa DT	597	unsigned int sd_freeze_count;
	598
	599	/* Counters */
	600
	601	atomic_t sd_glock_count;
	602	atomic_t sd_glock_held_count;
	603	atomic_t sd_inode_count;
b3b94faa	604	atomic_t sd_reclaimed;
b3b94faa DT	605
	606	char sd_fsname[GFS2_FSNAME_LEN];
	607	char sd_table_name[GFS2_FSNAME_LEN];
	608	char sd_proto_name[GFS2_FSNAME_LEN];
	609
	610	/* Debugging crud */
	611
	612	unsigned long sd_last_warning;
86384605	613	struct vfsmount *sd_gfs2mnt;
7c52b166	614	struct dentry debugfs_dentry; / for debugfs */
b3b94faa DT	615	};
	616
	617	#endif /* __INCORE_DOT_H__ */
	618