[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_DATA	0x00000040
#define DIO_RELEASE	0x00000080
#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 *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 rd_ri;
	struct gfs2_rgrp 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, 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);
	const 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_ABORTED		= 9,
};

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;
	struct completion gh_wait;
	unsigned long gh_ip;
};

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

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, HIF_GREEDY */
	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_QD_LOCKED		= 1,
	GIF_PAGED		= 2,
	GIF_SW_PAGED		= 3,
};

struct gfs2_inode {
	struct inode i_inode;
	struct gfs2_inum i_num;

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

	u64 i_vn;
	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 int i_greedy;
	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_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;
};

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 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 sd_statfs_master;
	struct gfs2_statfs_change 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;
};

#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
	16	#define DIO_METADATA 0x00000020
	17	#define DIO_DATA 0x00000040
	18	#define DIO_RELEASE 0x00000080
	19	#define DIO_ALL 0x00000100
	20
	21	struct gfs2_log_operations;
	22	struct gfs2_log_element;
b3b94faa DT	23	struct gfs2_holder;
b3b94faa DT	24	struct gfs2_glock;
b3b94faa	25	struct gfs2_quota_data;
b3b94faa DT	26	struct gfs2_trans;
	27	struct gfs2_ail;
	28	struct gfs2_jdesc;
b3b94faa DT	29	struct gfs2_sbd;
	30
	31	typedef void (gfs2_glop_bh_t) (struct gfs2_glock gl, unsigned int ret);
	32
	33	/*
	34	* Structure of operations that are associated with each
	35	* type of element in the log.
	36	*/
	37
	38	struct gfs2_log_operations {
	39	void (lo_add) (struct gfs2_sbd sdp, struct gfs2_log_element *le);
	40	void (lo_incore_commit) (struct gfs2_sbd sdp, struct gfs2_trans *tr);
	41	void (lo_before_commit) (struct gfs2_sbd sdp);
	42	void (lo_after_commit) (struct gfs2_sbd sdp, struct gfs2_ail *ai);
	43	void (lo_before_scan) (struct gfs2_jdesc jd,
	44	struct gfs2_log_header *head, int pass);
	45	int (lo_scan_elements) (struct gfs2_jdesc jd, unsigned int start,
	46	struct gfs2_log_descriptor ld, __be64 ptr,
	47	int pass);
	48	void (lo_after_scan) (struct gfs2_jdesc jd, int error, int pass);
b09e593d	49	const char *lo_name;
b3b94faa DT	50	};
	51
	52	struct gfs2_log_element {
	53	struct list_head le_list;
b09e593d	54	const struct gfs2_log_operations *le_ops;
b3b94faa DT	55	};
	56
	57	struct gfs2_bitmap {
	58	struct buffer_head *bi_bh;
	59	char *bi_clone;
cd915493 SW	60	u32 bi_offset;
	61	u32 bi_start;
	62	u32 bi_len;
b3b94faa DT	63	};
	64
	65	struct gfs2_rgrpd {
	66	struct list_head rd_list; /* Link with superblock */
	67	struct list_head rd_list_mru;
	68	struct list_head rd_recent; /* Recently used rgrps */
	69	struct gfs2_glock rd_gl; / Glock for this rgrp */
	70	struct gfs2_rindex rd_ri;
	71	struct gfs2_rgrp rd_rg;
cd915493	72	u64 rd_rg_vn;
b3b94faa DT	73	struct gfs2_bitmap *rd_bits;
b3b94faa DT	74	unsigned int rd_bh_count;
f55ab26a	75	struct mutex rd_mutex;
cd915493	76	u32 rd_free_clone;
b3b94faa	77	struct gfs2_log_element rd_le;
cd915493 SW	78	u32 rd_last_alloc_data;
cd915493 SW	79	u32 rd_last_alloc_meta;
b3b94faa DT	80	struct gfs2_sbd *rd_sbd;
	81	};
	82
	83	enum gfs2_state_bits {
	84	BH_Pinned = BH_PrivateStart,
f42faf4f	85	BH_Escaped = BH_PrivateStart + 1,
b3b94faa DT	86	};
	87
	88	BUFFER_FNS(Pinned, pinned)
	89	TAS_BUFFER_FNS(Pinned, pinned)
f42faf4f SW	90	BUFFER_FNS(Escaped, escaped)
f42faf4f SW	91	TAS_BUFFER_FNS(Escaped, escaped)
b3b94faa DT	92
	93	struct gfs2_bufdata {
	94	struct buffer_head *bd_bh;
	95	struct gfs2_glock *bd_gl;
	96
	97	struct list_head bd_list_tr;
	98	struct gfs2_log_element bd_le;
	99
	100	struct gfs2_ail *bd_ail;
	101	struct list_head bd_ail_st_list;
	102	struct list_head bd_ail_gl_list;
	103	};
	104
b3b94faa DT	105	struct gfs2_glock_operations {
	106	void (go_xmote_th) (struct gfs2_glock gl, unsigned int state,
	107	int flags);
	108	void (go_xmote_bh) (struct gfs2_glock gl);
	109	void (go_drop_th) (struct gfs2_glock gl);
	110	void (go_drop_bh) (struct gfs2_glock gl);
	111	void (go_sync) (struct gfs2_glock gl, int flags);
	112	void (go_inval) (struct gfs2_glock gl, int flags);
	113	int (go_demote_ok) (struct gfs2_glock gl);
	114	int (go_lock) (struct gfs2_holder gh);
	115	void (go_unlock) (struct gfs2_holder gh);
	116	void (go_callback) (struct gfs2_glock gl, unsigned int state);
	117	void (go_greedy) (struct gfs2_glock gl);
8fb4b536	118	const int go_type;
b3b94faa DT	119	};
	120
	121	enum {
	122	/* Actions */
	123	HIF_MUTEX = 0,
	124	HIF_PROMOTE = 1,
	125	HIF_DEMOTE = 2,
	126	HIF_GREEDY = 3,
	127
	128	/* States */
	129	HIF_ALLOCED = 4,
	130	HIF_DEALLOC = 5,
	131	HIF_HOLDER = 6,
	132	HIF_FIRST = 7,
b3b94faa DT	133	HIF_ABORTED = 9,
	134	};
	135
	136	struct gfs2_holder {
	137	struct list_head gh_list;
	138
	139	struct gfs2_glock *gh_gl;
	140	struct task_struct *gh_owner;
	141	unsigned int gh_state;
fe1bdedc	142	unsigned gh_flags;
b3b94faa DT	143
b3b94faa DT	144	int gh_error;
695165df	145	unsigned long gh_iflags;
b3b94faa	146	struct completion gh_wait;
d0dc80db	147	unsigned long gh_ip;
b3b94faa DT	148	};
	149
	150	enum {
b3b94faa DT	151	GLF_LOCK = 1,
	152	GLF_STICKY = 2,
	153	GLF_PREFETCH = 3,
b3b94faa DT	154	GLF_DIRTY = 5,
	155	GLF_SKIP_WAITERS2 = 6,
	156	GLF_GREEDY = 7,
	157	};
	158
	159	struct gfs2_glock {
b6397893	160	struct hlist_node gl_list;
b3b94faa DT	161	unsigned long gl_flags; /* GLF_... */
b3b94faa DT	162	struct lm_lockname gl_name;
16feb9fe	163	atomic_t gl_ref;
b3b94faa DT	164
	165	spinlock_t gl_spin;
	166
	167	unsigned int gl_state;
37b2fa6a	168	unsigned int gl_hash;
320dd101 SW	169	struct task_struct *gl_owner;
320dd101 SW	170	unsigned long gl_ip;
b3b94faa DT	171	struct list_head gl_holders;
	172	struct list_head gl_waiters1; /* HIF_MUTEX */
	173	struct list_head gl_waiters2; /* HIF_DEMOTE, HIF_GREEDY */
	174	struct list_head gl_waiters3; /* HIF_PROMOTE */
	175
8fb4b536	176	const struct gfs2_glock_operations *gl_ops;
b3b94faa DT	177
	178	struct gfs2_holder *gl_req_gh;
	179	gfs2_glop_bh_t gl_req_bh;
	180
9b47c11d	181	void *gl_lock;
b3b94faa DT	182	char *gl_lvb;
	183	atomic_t gl_lvb_count;
	184
cd915493	185	u64 gl_vn;
b3b94faa DT	186	unsigned long gl_stamp;
	187	void *gl_object;
	188
b3b94faa DT	189	struct list_head gl_reclaim;
	190
	191	struct gfs2_sbd *gl_sbd;
	192
	193	struct inode *gl_aspace;
	194	struct gfs2_log_element gl_le;
	195	struct list_head gl_ail_list;
	196	atomic_t gl_ail_count;
	197	};
	198
	199	struct gfs2_alloc {
	200	/* Quota stuff */
	201
e9fc2aa0 SW	202	struct gfs2_quota_data al_qd[2MAXQUOTAS];
e9fc2aa0 SW	203	struct gfs2_holder al_qd_ghs[2*MAXQUOTAS];
6b61b072	204	unsigned int al_qd_num;
b3b94faa	205
6b61b072 SW	206	u32 al_requested; /* Filled in by caller of gfs2_inplace_reserve() */
6b61b072 SW	207	u32 al_alloced; /* Filled in by gfs2_alloc_() /
b3b94faa DT	208
	209	/* Filled in by gfs2_inplace_reserve() */
	210
b3b94faa	211	unsigned int al_line;
6b61b072	212	char *al_file;
b3b94faa DT	213	struct gfs2_holder al_ri_gh;
	214	struct gfs2_holder al_rgd_gh;
	215	struct gfs2_rgrpd *al_rgd;
	216
b3b94faa DT	217	};
	218
	219	enum {
b3b94faa DT	220	GIF_QD_LOCKED = 1,
	221	GIF_PAGED = 2,
	222	GIF_SW_PAGED = 3,
	223	};
	224
	225	struct gfs2_inode {
320dd101	226	struct inode i_inode;
b3b94faa DT	227	struct gfs2_inum i_num;
b3b94faa DT	228
b3b94faa DT	229	unsigned long i_flags; /* GIF_... */
b3b94faa DT	230
cd915493	231	u64 i_vn;
5c6edb57	232	struct gfs2_dinode_host i_di; /* To be replaced by ref to block */
b3b94faa	233
feaa7bba	234	struct gfs2_glock i_gl; / Move into i_gh? */
b3b94faa	235	struct gfs2_holder i_iopen_gh;
f42faf4f	236	struct gfs2_holder i_gh; /* for prepare/commit_write only */
b3b94faa	237	struct gfs2_alloc i_alloc;
cd915493	238	u64 i_last_rg_alloc;
b3b94faa DT	239
	240	spinlock_t i_spin;
	241	struct rw_semaphore i_rw_mutex;
b3b94faa DT	242	unsigned int i_greedy;
	243	unsigned long i_last_pfault;
	244
	245	struct buffer_head *i_cache[GFS2_MAX_META_HEIGHT];
	246	};
	247
feaa7bba SW	248	/*
	249	* Since i_inode is the first element of struct gfs2_inode,
	250	* this is effectively a cast.
	251	*/
320dd101 SW	252	static inline struct gfs2_inode GFS2_I(struct inode inode)
	253	{
	254	return container_of(inode, struct gfs2_inode, i_inode);
	255	}
	256
feaa7bba SW	257	/* To be removed? */
	258	static inline struct gfs2_sbd GFS2_SB(struct inode inode)
	259	{
	260	return inode->i_sb->s_fs_info;
	261	}
	262
b3b94faa DT	263	enum {
b3b94faa DT	264	GFF_DID_DIRECT_ALLOC = 0,
59a1cc6b	265	GFF_EXLOCK = 1,
b3b94faa DT	266	};
	267
	268	struct gfs2_file {
	269	unsigned long f_flags; /* GFF_... */
f55ab26a	270	struct mutex f_fl_mutex;
b3b94faa	271	struct gfs2_holder f_fl_gh;
b3b94faa DT	272	};
	273
	274	struct gfs2_revoke {
	275	struct gfs2_log_element rv_le;
cd915493	276	u64 rv_blkno;
b3b94faa DT	277	};
	278
	279	struct gfs2_revoke_replay {
	280	struct list_head rr_list;
cd915493	281	u64 rr_blkno;
b3b94faa DT	282	unsigned int rr_where;
	283	};
	284
b3b94faa DT	285	enum {
	286	QDF_USER = 0,
	287	QDF_CHANGE = 1,
	288	QDF_LOCKED = 2,
	289	};
	290
5c676f6d	291	struct gfs2_quota_lvb {
e9fc2aa0 SW	292	__be32 qb_magic;
	293	u32 __pad;
	294	__be64 qb_limit; /* Hard limit of # blocks to alloc */
	295	__be64 qb_warn; /* Warn user when alloc is above this # */
	296	__be64 qb_value; /* Current # blocks allocated */
5c676f6d SW	297	};
5c676f6d SW	298
b3b94faa DT	299	struct gfs2_quota_data {
	300	struct list_head qd_list;
	301	unsigned int qd_count;
	302
cd915493	303	u32 qd_id;
b3b94faa DT	304	unsigned long qd_flags; /* QDF_... */
b3b94faa DT	305
cd915493 SW	306	s64 qd_change;
cd915493 SW	307	s64 qd_change_sync;
b3b94faa DT	308
	309	unsigned int qd_slot;
	310	unsigned int qd_slot_count;
	311
	312	struct buffer_head *qd_bh;
	313	struct gfs2_quota_change *qd_bh_qc;
	314	unsigned int qd_bh_count;
	315
	316	struct gfs2_glock *qd_gl;
	317	struct gfs2_quota_lvb qd_qb;
	318
cd915493	319	u64 qd_sync_gen;
b3b94faa DT	320	unsigned long qd_last_warn;
	321	unsigned long qd_last_touched;
	322	};
	323
	324	struct gfs2_log_buf {
	325	struct list_head lb_list;
	326	struct buffer_head *lb_bh;
	327	struct buffer_head *lb_real;
	328	};
	329
	330	struct gfs2_trans {
d0dc80db	331	unsigned long tr_ip;
b3b94faa DT	332
	333	unsigned int tr_blocks;
	334	unsigned int tr_revokes;
	335	unsigned int tr_reserved;
	336
e317ffcb	337	struct gfs2_holder tr_t_gh;
b3b94faa DT	338
	339	int tr_touched;
	340
	341	unsigned int tr_num_buf;
	342	unsigned int tr_num_buf_new;
	343	unsigned int tr_num_buf_rm;
	344	struct list_head tr_list_buf;
	345
	346	unsigned int tr_num_revoke;
	347	unsigned int tr_num_revoke_rm;
	348	};
	349
	350	struct gfs2_ail {
	351	struct list_head ai_list;
	352
	353	unsigned int ai_first;
	354	struct list_head ai_ail1_list;
	355	struct list_head ai_ail2_list;
	356
cd915493	357	u64 ai_sync_gen;
b3b94faa DT	358	};
	359
	360	struct gfs2_jdesc {
	361	struct list_head jd_list;
	362
7359a19c	363	struct inode *jd_inode;
b3b94faa DT	364	unsigned int jd_jid;
	365	int jd_dirty;
	366
	367	unsigned int jd_blocks;
	368	};
	369
	370	#define GFS2_GLOCKD_DEFAULT 1
	371	#define GFS2_GLOCKD_MAX 16
	372
	373	#define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF
	374	#define GFS2_QUOTA_OFF 0
	375	#define GFS2_QUOTA_ACCOUNT 1
	376	#define GFS2_QUOTA_ON 2
	377
	378	#define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED
	379	#define GFS2_DATA_WRITEBACK 1
	380	#define GFS2_DATA_ORDERED 2
	381
	382	struct gfs2_args {
	383	char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
	384	char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
	385	char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
	386	int ar_spectator; /* Don't get a journal because we're always RO */
	387	int ar_ignore_local_fs; /* Don't optimize even if local_fs is 1 */
	388	int ar_localflocks; /* Let the VFS do flock\|fcntl locks for us */
	389	int ar_localcaching; /* Local-style caching (dangerous on multihost) */
	390	int ar_debug; /* Oops on errors instead of trying to be graceful */
	391	int ar_upgrade; /* Upgrade ondisk/multihost format */
	392	unsigned int ar_num_glockd; /* Number of glockd threads */
	393	int ar_posix_acl; /* Enable posix acls */
	394	int ar_quota; /* off/account/on */
	395	int ar_suiddir; /* suiddir support */
	396	int ar_data; /* ordered/writeback */
	397	};
	398
	399	struct gfs2_tune {
	400	spinlock_t gt_spin;
	401
	402	unsigned int gt_ilimit;
	403	unsigned int gt_ilimit_tries;
	404	unsigned int gt_ilimit_min;
	405	unsigned int gt_demote_secs; /* Cache retention for unheld glock */
	406	unsigned int gt_incore_log_blocks;
	407	unsigned int gt_log_flush_secs;
	408	unsigned int gt_jindex_refresh_secs; /* Check for new journal index */
	409
	410	unsigned int gt_scand_secs;
	411	unsigned int gt_recoverd_secs;
	412	unsigned int gt_logd_secs;
	413	unsigned int gt_quotad_secs;
b3b94faa DT	414
	415	unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
	416	unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
	417	unsigned int gt_quota_scale_num; /* Numerator */
	418	unsigned int gt_quota_scale_den; /* Denominator */
	419	unsigned int gt_quota_cache_secs;
	420	unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
	421	unsigned int gt_atime_quantum; /* Min secs between atime updates */
	422	unsigned int gt_new_files_jdata;
	423	unsigned int gt_new_files_directio;
	424	unsigned int gt_max_atomic_write; /* Split big writes into this size */
	425	unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
	426	unsigned int gt_lockdump_size;
	427	unsigned int gt_stall_secs; /* Detects trouble! */
	428	unsigned int gt_complain_secs;
	429	unsigned int gt_reclaim_limit; /* Max num of glocks in reclaim list */
	430	unsigned int gt_entries_per_readdir;
	431	unsigned int gt_prefetch_secs; /* Usage window for prefetched glocks */
	432	unsigned int gt_greedy_default;
	433	unsigned int gt_greedy_quantum;
	434	unsigned int gt_greedy_max;
	435	unsigned int gt_statfs_quantum;
	436	unsigned int gt_statfs_slow;
	437	};
	438
b3b94faa DT	439	enum {
	440	SDF_JOURNAL_CHECKED = 0,
	441	SDF_JOURNAL_LIVE = 1,
	442	SDF_SHUTDOWN = 2,
	443	SDF_NOATIME = 3,
	444	};
	445
b3b94faa DT	446	#define GFS2_FSNAME_LEN 256
	447
	448	struct gfs2_sbd {
	449	struct super_block *sd_vfs;
86384605	450	struct super_block *sd_vfs_meta;
b3b94faa DT	451	struct kobject sd_kobj;
	452	unsigned long sd_flags; /* SDF_... */
	453	struct gfs2_sb sd_sb;
	454
	455	/* Constants computed on mount */
	456
cd915493 SW	457	u32 sd_fsb2bb;
	458	u32 sd_fsb2bb_shift;
	459	u32 sd_diptrs; /* Number of pointers in a dinode */
	460	u32 sd_inptrs; /* Number of pointers in a indirect block */
	461	u32 sd_jbsize; /* Size of a journaled data block */
	462	u32 sd_hash_bsize; /* sizeof(exhash block) */
	463	u32 sd_hash_bsize_shift;
	464	u32 sd_hash_ptrs; /* Number of pointers in a hash block */
	465	u32 sd_qc_per_block;
	466	u32 sd_max_dirres; /* Max blocks needed to add a directory entry */
	467	u32 sd_max_height; /* Max height of a file's metadata tree */
	468	u64 sd_heightsize[GFS2_MAX_META_HEIGHT];
	469	u32 sd_max_jheight; /* Max height of journaled file's meta tree */
	470	u64 sd_jheightsize[GFS2_MAX_META_HEIGHT];
b3b94faa DT	471
	472	struct gfs2_args sd_args; /* Mount arguments */
	473	struct gfs2_tune sd_tune; /* Filesystem tuning structure */
	474
	475	/* Lock Stuff */
	476
	477	struct lm_lockstruct sd_lockstruct;
b3b94faa DT	478	struct list_head sd_reclaim_list;
	479	spinlock_t sd_reclaim_lock;
	480	wait_queue_head_t sd_reclaim_wq;
	481	atomic_t sd_reclaim_count;
	482	struct gfs2_holder sd_live_gh;
	483	struct gfs2_glock *sd_rename_gl;
	484	struct gfs2_glock *sd_trans_gl;
b3b94faa DT	485
	486	/* Inode Stuff */
	487
f42faf4f SW	488	struct inode *sd_master_dir;
	489	struct inode *sd_jindex;
	490	struct inode *sd_inum_inode;
	491	struct inode *sd_statfs_inode;
	492	struct inode *sd_ir_inode;
	493	struct inode *sd_sc_inode;
f42faf4f SW	494	struct inode *sd_qc_inode;
	495	struct inode *sd_rindex;
	496	struct inode *sd_quota_inode;
b3b94faa DT	497
	498	/* Inum stuff */
	499
f55ab26a	500	struct mutex sd_inum_mutex;
b3b94faa DT	501
	502	/* StatFS stuff */
	503
	504	spinlock_t sd_statfs_spin;
f55ab26a	505	struct mutex sd_statfs_mutex;
b3b94faa DT	506	struct gfs2_statfs_change sd_statfs_master;
	507	struct gfs2_statfs_change sd_statfs_local;
	508	unsigned long sd_statfs_sync_time;
	509
	510	/* Resource group stuff */
	511
cd915493	512	u64 sd_rindex_vn;
b3b94faa	513	spinlock_t sd_rindex_spin;
f55ab26a	514	struct mutex sd_rindex_mutex;
b3b94faa DT	515	struct list_head sd_rindex_list;
	516	struct list_head sd_rindex_mru_list;
	517	struct list_head sd_rindex_recent_list;
	518	struct gfs2_rgrpd *sd_rindex_forward;
	519	unsigned int sd_rgrps;
	520
	521	/* Journal index stuff */
	522
	523	struct list_head sd_jindex_list;
	524	spinlock_t sd_jindex_spin;
f55ab26a	525	struct mutex sd_jindex_mutex;
b3b94faa DT	526	unsigned int sd_journals;
	527	unsigned long sd_jindex_refresh_time;
	528
	529	struct gfs2_jdesc *sd_jdesc;
	530	struct gfs2_holder sd_journal_gh;
	531	struct gfs2_holder sd_jinode_gh;
	532
	533	struct gfs2_holder sd_ir_gh;
	534	struct gfs2_holder sd_sc_gh;
b3b94faa DT	535	struct gfs2_holder sd_qc_gh;
	536
	537	/* Daemon stuff */
	538
	539	struct task_struct *sd_scand_process;
	540	struct task_struct *sd_recoverd_process;
	541	struct task_struct *sd_logd_process;
	542	struct task_struct *sd_quotad_process;
b3b94faa DT	543	struct task_struct *sd_glockd_process[GFS2_GLOCKD_MAX];
	544	unsigned int sd_glockd_num;
	545
b3b94faa DT	546	/* Quota stuff */
	547
	548	struct list_head sd_quota_list;
	549	atomic_t sd_quota_count;
	550	spinlock_t sd_quota_spin;
f55ab26a	551	struct mutex sd_quota_mutex;
b3b94faa DT	552
	553	unsigned int sd_quota_slots;
	554	unsigned int sd_quota_chunks;
	555	unsigned char **sd_quota_bitmap;
	556
cd915493	557	u64 sd_quota_sync_gen;
b3b94faa DT	558	unsigned long sd_quota_sync_time;
	559
	560	/* Log stuff */
	561
	562	spinlock_t sd_log_lock;
b3b94faa DT	563
	564	unsigned int sd_log_blks_reserved;
	565	unsigned int sd_log_commited_buf;
	566	unsigned int sd_log_commited_revoke;
	567
	568	unsigned int sd_log_num_gl;
	569	unsigned int sd_log_num_buf;
	570	unsigned int sd_log_num_revoke;
	571	unsigned int sd_log_num_rg;
	572	unsigned int sd_log_num_databuf;
f42faf4f	573	unsigned int sd_log_num_jdata;
b09e593d	574	unsigned int sd_log_num_hdrs;
f42faf4f	575
b3b94faa DT	576	struct list_head sd_log_le_gl;
	577	struct list_head sd_log_le_buf;
	578	struct list_head sd_log_le_revoke;
	579	struct list_head sd_log_le_rg;
	580	struct list_head sd_log_le_databuf;
	581
	582	unsigned int sd_log_blks_free;
71b86f56	583	struct mutex sd_log_reserve_mutex;
b3b94faa	584
cd915493	585	u64 sd_log_sequence;
b3b94faa DT	586	unsigned int sd_log_head;
b3b94faa DT	587	unsigned int sd_log_tail;
b3b94faa DT	588	int sd_log_idle;
	589
	590	unsigned long sd_log_flush_time;
484adff8	591	struct rw_semaphore sd_log_flush_lock;
b3b94faa DT	592	struct list_head sd_log_flush_list;
	593
	594	unsigned int sd_log_flush_head;
cd915493	595	u64 sd_log_flush_wrapped;
b3b94faa DT	596
	597	struct list_head sd_ail1_list;
	598	struct list_head sd_ail2_list;
cd915493	599	u64 sd_ail_sync_gen;
b3b94faa DT	600
	601	/* Replay stuff */
	602
	603	struct list_head sd_revoke_list;
	604	unsigned int sd_replay_tail;
	605
	606	unsigned int sd_found_blocks;
	607	unsigned int sd_found_revokes;
	608	unsigned int sd_replayed_blocks;
	609
	610	/* For quiescing the filesystem */
	611
	612	struct gfs2_holder sd_freeze_gh;
f55ab26a	613	struct mutex sd_freeze_lock;
b3b94faa DT	614	unsigned int sd_freeze_count;
	615
	616	/* Counters */
	617
	618	atomic_t sd_glock_count;
	619	atomic_t sd_glock_held_count;
	620	atomic_t sd_inode_count;
b3b94faa	621	atomic_t sd_reclaimed;
b3b94faa DT	622
	623	char sd_fsname[GFS2_FSNAME_LEN];
	624	char sd_table_name[GFS2_FSNAME_LEN];
	625	char sd_proto_name[GFS2_FSNAME_LEN];
	626
	627	/* Debugging crud */
	628
	629	unsigned long sd_last_warning;
86384605	630	struct vfsmount *sd_gfs2mnt;
b3b94faa DT	631	};
	632
	633	#endif /* __INCORE_DOT_H__ */
	634