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

/*
 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
 * Copyright (C) 2004-2008 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>
#include <linux/workqueue.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);

struct gfs2_log_header_host {
	u64 lh_sequence;	/* Sequence number of this transaction */
	u32 lh_flags;		/* GFS2_LOG_HEAD_... */
	u32 lh_tail;		/* Block number of log tail */
	u32 lh_blkno;
	u32 lh_hash;
};

/*
 * 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_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_rgrp_host {
	u32 rg_free;
	u32 rg_dinodes;
	u64 rg_igeneration;
};

struct gfs2_rgrpd {
	struct list_head rd_list;	/* Link with superblock */
	struct list_head rd_list_mru;
	struct gfs2_glock *rd_gl;	/* Glock for this rgrp */
	u64 rd_addr;			/* grp block disk address */
	u64 rd_data0;			/* first data location */
	u32 rd_length;			/* length of rgrp header in fs blocks */
	u32 rd_data;			/* num of data blocks in rgrp */
	u32 rd_bitbytes;		/* number of bytes in data bitmaps */
	struct gfs2_rgrp_host rd_rg;
	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;
	struct gfs2_sbd *rd_sbd;
	unsigned char rd_flags;
#define GFS2_RDF_CHECK        0x01      /* Need to check for unlinked inodes */
#define GFS2_RDF_NOALLOC      0x02      /* rg prohibits allocation */
#define GFS2_RDF_UPTODATE     0x04      /* rg is up to date */
};

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;

	union {
		struct list_head list_tr;
		u64 blkno;
	} u;
#define bd_list_tr u.list_tr
#define bd_blkno u.blkno

	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);
	int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);
	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);
	int (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl);
	const int go_type;
	const unsigned long go_min_hold_time;
};

enum {
	/* States */
	HIF_HOLDER		= 6,  /* Set for gh that "holds" the glock */
	HIF_FIRST		= 7,
	HIF_WAIT		= 10,
};

struct gfs2_holder {
	struct list_head gh_list;

	struct gfs2_glock *gh_gl;
	struct pid *gh_owner_pid;
	unsigned int gh_state;
	unsigned gh_flags;

	int gh_error;
	unsigned long gh_iflags; /* HIF_... */
	unsigned long gh_ip;
};

enum {
	GLF_LOCK			= 1,
	GLF_STICKY			= 2,
	GLF_DEMOTE			= 3,
	GLF_PENDING_DEMOTE		= 4,
	GLF_DEMOTE_IN_PROGRESS		= 5,
	GLF_DIRTY			= 6,
	GLF_LFLUSH			= 7,
	GLF_INVALIDATE_IN_PROGRESS	= 8,
	GLF_REPLY_PENDING		= 9,
};

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_target;
	unsigned int gl_reply;
	unsigned int gl_hash;
	unsigned int gl_demote_state; /* state requested by remote node */
	unsigned long gl_demote_time; /* time of first demote request */
	struct list_head gl_holders;

	const struct gfs2_glock_operations *gl_ops;
	void *gl_lock;
	char *gl_lvb;
	atomic_t gl_lvb_count;

	unsigned long gl_stamp;
	unsigned long gl_tchange;
	void *gl_object;

	struct list_head gl_reclaim;

	struct gfs2_sbd *gl_sbd;

	struct inode *gl_aspace;
	struct list_head gl_ail_list;
	atomic_t gl_ail_count;
	struct delayed_work gl_work;
};

#define GFS2_MIN_LVB_SIZE 32	/* Min size of LVB that gfs2 supports */

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_SW_PAGED		= 3,
	GIF_USER                = 4, /* user inode, not metadata addr space */
};


struct gfs2_inode {
	struct inode i_inode;
	u64 i_no_addr;
	u64 i_no_formal_ino;
	u64 i_generation;
	u64 i_eattr;
	loff_t i_disksize;
	unsigned long i_flags;		/* GIF_... */
	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_goal;	/* goal block for allocations */
	struct rw_semaphore i_rw_mutex;
	u32 i_entries;
	u32 i_diskflags;
	u8 i_height;
	u8 i_depth;
};

/*
 * 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);
}

static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
{
	return inode->i_sb->s_fs_info;
}

struct gfs2_file {
	struct mutex f_fl_mutex;
	struct gfs2_holder f_fl_gh;
};

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_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_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_databuf_new;
	unsigned int tr_num_buf_rm;
	unsigned int tr_num_databuf_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_journal_extent {
	struct list_head extent_list;

	unsigned int lblock; /* First logical block */
	u64 dblock; /* First disk block */
	u64 blocks;
};

struct gfs2_jdesc {
	struct list_head jd_list;
	struct list_head extent_list;

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

	unsigned int jd_blocks;
};

struct gfs2_statfs_change_host {
	s64 sc_total;
	s64 sc_free;
	s64 sc_dinodes;
};

#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 */
	unsigned int ar_spectator:1;		/* Don't get a journal */
	unsigned int ar_ignore_local_fs:1;	/* Ignore optimisations */
	unsigned int ar_localflocks:1;		/* Let the VFS do flock|fcntl */
	unsigned int ar_localcaching:1;		/* Local caching */
	unsigned int ar_debug:1;		/* Oops on errors */
	unsigned int ar_upgrade:1;		/* Upgrade ondisk format */
	unsigned int ar_posix_acl:1;		/* Enable posix acls */
	unsigned int ar_quota:2;		/* off/account/on */
	unsigned int ar_suiddir:1;		/* suiddir support */
	unsigned int ar_data:2;			/* ordered/writeback */
	unsigned int ar_meta:1;			/* mount metafs */
	unsigned int ar_num_glockd;		/* Number of glockd threads */
};

struct gfs2_tune {
	spinlock_t gt_spin;

	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_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_new_files_jdata;
	unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
	unsigned int gt_stall_secs; /* Detects trouble! */
	unsigned int gt_complain_secs;
	unsigned int gt_statfs_quantum;
	unsigned int gt_statfs_slow;
};

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

#define GFS2_FSNAME_LEN		256

struct gfs2_inum_host {
	u64 no_formal_ino;
	u64 no_addr;
};

struct gfs2_sb_host {
	u32 sb_magic;
	u32 sb_type;
	u32 sb_format;

	u32 sb_fs_format;
	u32 sb_multihost_format;
	u32 sb_bsize;
	u32 sb_bsize_shift;

	struct gfs2_inum_host sb_master_dir;
	struct gfs2_inum_host sb_root_dir;

	char sb_lockproto[GFS2_LOCKNAME_LEN];
	char sb_locktable[GFS2_LOCKNAME_LEN];
};

struct gfs2_sbd {
	struct super_block *sd_vfs;
	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 + 1];
	u32 sd_max_jheight; /* Max height of journaled file's meta tree */
	u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1];

	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 dentry *sd_master_dir;
	struct dentry *sd_root_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 gfs2_statfs_change_host sd_statfs_master;
	struct gfs2_statfs_change_host sd_statfs_local;
	unsigned long sd_statfs_sync_time;

	/* Resource group stuff */

	int sd_rindex_uptodate;
	spinlock_t sd_rindex_spin;
	struct mutex sd_rindex_mutex;
	struct list_head sd_rindex_list;
	struct list_head sd_rindex_mru_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_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_databuf;
	unsigned int sd_log_commited_revoke;

	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_buf;
	struct list_head sd_log_le_revoke;
	struct list_head sd_log_le_rg;
	struct list_head sd_log_le_databuf;
	struct list_head sd_log_le_ordered;

	atomic_t 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;
	atomic_t sd_log_in_flight;
	wait_queue_head_t sd_log_flush_wait;

	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_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 dentry *debugfs_dir;    /* debugfs directory */
	struct dentry *debugfs_dentry_glocks; /* 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.
29d38cd1	3	* Copyright (C) 2004-2008 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	13	#include <linux/fs.h>
c4f68a13	14	#include <linux/workqueue.h>
f2f7ba52	15
b3b94faa DT	16	#define DIO_WAIT 0x00000010
b3b94faa DT	17	#define DIO_METADATA 0x00000020
b3b94faa DT	18	#define DIO_ALL 0x00000100
	19
	20	struct gfs2_log_operations;
	21	struct gfs2_log_element;
b3b94faa DT	22	struct gfs2_holder;
b3b94faa DT	23	struct gfs2_glock;
b3b94faa	24	struct gfs2_quota_data;
b3b94faa DT	25	struct gfs2_trans;
	26	struct gfs2_ail;
	27	struct gfs2_jdesc;
b3b94faa DT	28	struct gfs2_sbd;
	29
	30	typedef void (gfs2_glop_bh_t) (struct gfs2_glock gl, unsigned int ret);
	31
bb8d8a6f SW	32	struct gfs2_log_header_host {
	33	u64 lh_sequence; /* Sequence number of this transaction */
	34	u32 lh_flags; /* GFS2_LOG_HEAD_... */
	35	u32 lh_tail; /* Block number of log tail */
	36	u32 lh_blkno;
	37	u32 lh_hash;
	38	};
	39
b3b94faa DT	40	/*
	41	* Structure of operations that are associated with each
	42	* type of element in the log.
	43	*/
	44
	45	struct gfs2_log_operations {
	46	void (lo_add) (struct gfs2_sbd sdp, struct gfs2_log_element *le);
b3b94faa DT	47	void (lo_before_commit) (struct gfs2_sbd sdp);
	48	void (lo_after_commit) (struct gfs2_sbd sdp, struct gfs2_ail *ai);
	49	void (lo_before_scan) (struct gfs2_jdesc jd,
55167622	50	struct gfs2_log_header_host *head, int pass);
b3b94faa DT	51	int (lo_scan_elements) (struct gfs2_jdesc jd, unsigned int start,
	52	struct gfs2_log_descriptor ld, __be64 ptr,
	53	int pass);
	54	void (lo_after_scan) (struct gfs2_jdesc jd, int error, int pass);
b09e593d	55	const char *lo_name;
b3b94faa DT	56	};
	57
	58	struct gfs2_log_element {
	59	struct list_head le_list;
b09e593d	60	const struct gfs2_log_operations *le_ops;
b3b94faa DT	61	};
	62
	63	struct gfs2_bitmap {
	64	struct buffer_head *bi_bh;
	65	char *bi_clone;
cd915493 SW	66	u32 bi_offset;
	67	u32 bi_start;
	68	u32 bi_len;
b3b94faa DT	69	};
b3b94faa DT	70
bb8d8a6f	71	struct gfs2_rgrp_host {
bb8d8a6f SW	72	u32 rg_free;
	73	u32 rg_dinodes;
	74	u64 rg_igeneration;
	75	};
	76
b3b94faa DT	77	struct gfs2_rgrpd {
	78	struct list_head rd_list; /* Link with superblock */
	79	struct list_head rd_list_mru;
b3b94faa	80	struct gfs2_glock rd_gl; / Glock for this rgrp */
bb8d8a6f SW	81	u64 rd_addr; /* grp block disk address */
	82	u64 rd_data0; /* first data location */
	83	u32 rd_length; /* length of rgrp header in fs blocks */
	84	u32 rd_data; /* num of data blocks in rgrp */
	85	u32 rd_bitbytes; /* number of bytes in data bitmaps */
68826664	86	struct gfs2_rgrp_host rd_rg;
b3b94faa DT	87	struct gfs2_bitmap *rd_bits;
b3b94faa DT	88	unsigned int rd_bh_count;
f55ab26a	89	struct mutex rd_mutex;
cd915493	90	u32 rd_free_clone;
b3b94faa	91	struct gfs2_log_element rd_le;
ac576cc5	92	u32 rd_last_alloc;
b3b94faa	93	struct gfs2_sbd *rd_sbd;
42d52e38 BP	94	unsigned char rd_flags;
	95	#define GFS2_RDF_CHECK 0x01 /* Need to check for unlinked inodes */
	96	#define GFS2_RDF_NOALLOC 0x02 /* rg prohibits allocation */
cf45b752	97	#define GFS2_RDF_UPTODATE 0x04 /* rg is up to date */
b3b94faa DT	98	};
	99
	100	enum gfs2_state_bits {
	101	BH_Pinned = BH_PrivateStart,
f42faf4f	102	BH_Escaped = BH_PrivateStart + 1,
b3b94faa DT	103	};
	104
	105	BUFFER_FNS(Pinned, pinned)
	106	TAS_BUFFER_FNS(Pinned, pinned)
f42faf4f SW	107	BUFFER_FNS(Escaped, escaped)
f42faf4f SW	108	TAS_BUFFER_FNS(Escaped, escaped)
b3b94faa DT	109
	110	struct gfs2_bufdata {
	111	struct buffer_head *bd_bh;
	112	struct gfs2_glock *bd_gl;
	113
82e86087 SW	114	union {
	115	struct list_head list_tr;
	116	u64 blkno;
	117	} u;
	118	#define bd_list_tr u.list_tr
	119	#define bd_blkno u.blkno
	120
b3b94faa DT	121	struct gfs2_log_element bd_le;
	122
	123	struct gfs2_ail *bd_ail;
	124	struct list_head bd_ail_st_list;
	125	struct list_head bd_ail_gl_list;
	126	};
	127
b3b94faa	128	struct gfs2_glock_operations {
b5d32bea	129	void (go_xmote_th) (struct gfs2_glock gl);
6802e340	130	int (go_xmote_bh) (struct gfs2_glock gl, struct gfs2_holder *gh);
1a14d3a6 SW	131	void (go_inval) (struct gfs2_glock gl, int flags);
	132	int (go_demote_ok) (struct gfs2_glock gl);
	133	int (go_lock) (struct gfs2_holder gh);
	134	void (go_unlock) (struct gfs2_holder gh);
6802e340	135	int (go_dump)(struct seq_file seq, const struct gfs2_glock *gl);
8fb4b536	136	const int go_type;
c4f68a13	137	const unsigned long go_min_hold_time;
b3b94faa DT	138	};
	139
	140	enum {
b3b94faa	141	/* States */
6802e340	142	HIF_HOLDER = 6, /* Set for gh that "holds" the glock */
b3b94faa	143	HIF_FIRST = 7,
fee852e3	144	HIF_WAIT = 10,
b3b94faa DT	145	};
	146
	147	struct gfs2_holder {
	148	struct list_head gh_list;
	149
	150	struct gfs2_glock *gh_gl;
b1e058da	151	struct pid *gh_owner_pid;
b3b94faa	152	unsigned int gh_state;
fe1bdedc	153	unsigned gh_flags;
b3b94faa DT	154
b3b94faa DT	155	int gh_error;
6802e340	156	unsigned long gh_iflags; /* HIF_... */
d0dc80db	157	unsigned long gh_ip;
b3b94faa DT	158	};
	159
	160	enum {
6802e340 SW	161	GLF_LOCK = 1,
	162	GLF_STICKY = 2,
	163	GLF_DEMOTE = 3,
	164	GLF_PENDING_DEMOTE = 4,
	165	GLF_DEMOTE_IN_PROGRESS = 5,
	166	GLF_DIRTY = 6,
	167	GLF_LFLUSH = 7,
	168	GLF_INVALIDATE_IN_PROGRESS = 8,
	169	GLF_REPLY_PENDING = 9,
b3b94faa DT	170	};
	171
	172	struct gfs2_glock {
b6397893	173	struct hlist_node gl_list;
b3b94faa DT	174	unsigned long gl_flags; /* GLF_... */
b3b94faa DT	175	struct lm_lockname gl_name;
16feb9fe	176	atomic_t gl_ref;
b3b94faa DT	177
	178	spinlock_t gl_spin;
	179
	180	unsigned int gl_state;
6802e340 SW	181	unsigned int gl_target;
6802e340 SW	182	unsigned int gl_reply;
37b2fa6a	183	unsigned int gl_hash;
3b8249f6 SW	184	unsigned int gl_demote_state; /* state requested by remote node */
3b8249f6 SW	185	unsigned long gl_demote_time; /* time of first demote request */
b3b94faa	186	struct list_head gl_holders;
b3b94faa	187
8fb4b536	188	const struct gfs2_glock_operations *gl_ops;
9b47c11d	189	void *gl_lock;
b3b94faa DT	190	char *gl_lvb;
	191	atomic_t gl_lvb_count;
	192
b3b94faa	193	unsigned long gl_stamp;
c4f68a13	194	unsigned long gl_tchange;
b3b94faa DT	195	void *gl_object;
b3b94faa DT	196
b3b94faa DT	197	struct list_head gl_reclaim;
	198
	199	struct gfs2_sbd *gl_sbd;
	200
	201	struct inode *gl_aspace;
b3b94faa DT	202	struct list_head gl_ail_list;
b3b94faa DT	203	atomic_t gl_ail_count;
c4f68a13	204	struct delayed_work gl_work;
b3b94faa DT	205	};
b3b94faa DT	206
da755fdb SW	207	#define GFS2_MIN_LVB_SIZE 32 /* Min size of LVB that gfs2 supports */
da755fdb SW	208
b3b94faa DT	209	struct gfs2_alloc {
	210	/* Quota stuff */
	211
e9fc2aa0 SW	212	struct gfs2_quota_data al_qd[2MAXQUOTAS];
e9fc2aa0 SW	213	struct gfs2_holder al_qd_ghs[2*MAXQUOTAS];
6b61b072	214	unsigned int al_qd_num;
b3b94faa	215
6b61b072 SW	216	u32 al_requested; /* Filled in by caller of gfs2_inplace_reserve() */
6b61b072 SW	217	u32 al_alloced; /* Filled in by gfs2_alloc_() /
b3b94faa DT	218
	219	/* Filled in by gfs2_inplace_reserve() */
	220
b3b94faa	221	unsigned int al_line;
6b61b072	222	char *al_file;
b3b94faa DT	223	struct gfs2_holder al_ri_gh;
	224	struct gfs2_holder al_rgd_gh;
	225	struct gfs2_rgrpd *al_rgd;
	226
b3b94faa DT	227	};
	228
	229	enum {
bfded27b	230	GIF_INVALID = 0,
b3b94faa	231	GIF_QD_LOCKED = 1,
b3b94faa	232	GIF_SW_PAGED = 3,
091806ed	233	GIF_USER = 4, /* user inode, not metadata addr space */
b3b94faa DT	234	};
b3b94faa DT	235
bb8d8a6f	236
b3b94faa	237	struct gfs2_inode {
320dd101	238	struct inode i_inode;
dbb7cae2 SW	239	u64 i_no_addr;
dbb7cae2 SW	240	u64 i_no_formal_ino;
bcf0b5b3	241	u64 i_generation;
3767ac21	242	u64 i_eattr;
c9e98886	243	loff_t i_disksize;
b3b94faa	244	unsigned long i_flags; /* GIF_... */
feaa7bba	245	struct gfs2_glock i_gl; / Move into i_gh? */
b3b94faa	246	struct gfs2_holder i_iopen_gh;
f42faf4f	247	struct gfs2_holder i_gh; /* for prepare/commit_write only */
6dbd8224	248	struct gfs2_alloc *i_alloc;
ce276b06	249	u64 i_goal; /* goal block for allocations */
b3b94faa	250	struct rw_semaphore i_rw_mutex;
ad6203f2	251	u32 i_entries;
383f01fb	252	u32 i_diskflags;
ecc30c79	253	u8 i_height;
9a004508	254	u8 i_depth;
b3b94faa DT	255	};
b3b94faa DT	256
feaa7bba SW	257	/*
	258	* Since i_inode is the first element of struct gfs2_inode,
	259	* this is effectively a cast.
	260	*/
320dd101 SW	261	static inline struct gfs2_inode GFS2_I(struct inode inode)
	262	{
	263	return container_of(inode, struct gfs2_inode, i_inode);
	264	}
	265
bf36a713	266	static inline struct gfs2_sbd GFS2_SB(const struct inode inode)
feaa7bba SW	267	{
	268	return inode->i_sb->s_fs_info;
	269	}
	270
b3b94faa	271	struct gfs2_file {
f55ab26a	272	struct mutex f_fl_mutex;
b3b94faa	273	struct gfs2_holder f_fl_gh;
b3b94faa DT	274	};
b3b94faa DT	275
b3b94faa DT	276	struct gfs2_revoke_replay {
b3b94faa DT	277	struct list_head rr_list;
cd915493	278	u64 rr_blkno;
b3b94faa DT	279	unsigned int rr_where;
	280	};
	281
b3b94faa DT	282	enum {
	283	QDF_USER = 0,
	284	QDF_CHANGE = 1,
	285	QDF_LOCKED = 2,
	286	};
	287
	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
b3b94faa	313	struct gfs2_trans {
d0dc80db	314	unsigned long tr_ip;
b3b94faa DT	315
	316	unsigned int tr_blocks;
	317	unsigned int tr_revokes;
	318	unsigned int tr_reserved;
	319
e317ffcb	320	struct gfs2_holder tr_t_gh;
b3b94faa DT	321
	322	int tr_touched;
	323
	324	unsigned int tr_num_buf;
	325	unsigned int tr_num_buf_new;
2332c443	326	unsigned int tr_num_databuf_new;
b3b94faa	327	unsigned int tr_num_buf_rm;
2332c443	328	unsigned int tr_num_databuf_rm;
b3b94faa DT	329	struct list_head tr_list_buf;
	330
	331	unsigned int tr_num_revoke;
	332	unsigned int tr_num_revoke_rm;
	333	};
	334
	335	struct gfs2_ail {
	336	struct list_head ai_list;
	337
	338	unsigned int ai_first;
	339	struct list_head ai_ail1_list;
	340	struct list_head ai_ail2_list;
	341
cd915493	342	u64 ai_sync_gen;
b3b94faa DT	343	};
b3b94faa DT	344
da6dd40d BP	345	struct gfs2_journal_extent {
	346	struct list_head extent_list;
	347
	348	unsigned int lblock; /* First logical block */
	349	u64 dblock; /* First disk block */
	350	u64 blocks;
	351	};
	352
b3b94faa DT	353	struct gfs2_jdesc {
b3b94faa DT	354	struct list_head jd_list;
da6dd40d	355	struct list_head extent_list;
b3b94faa	356
7359a19c	357	struct inode *jd_inode;
b3b94faa DT	358	unsigned int jd_jid;
	359	int jd_dirty;
	360
	361	unsigned int jd_blocks;
	362	};
	363
bb8d8a6f SW	364	struct gfs2_statfs_change_host {
	365	s64 sc_total;
	366	s64 sc_free;
	367	s64 sc_dinodes;
	368	};
	369
b3b94faa DT	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 {
37ec89e8 SW	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	unsigned int ar_spectator:1; /* Don't get a journal */
	387	unsigned int ar_ignore_local_fs:1; /* Ignore optimisations */
	388	unsigned int ar_localflocks:1; /* Let the VFS do flock\|fcntl */
	389	unsigned int ar_localcaching:1; /* Local caching */
	390	unsigned int ar_debug:1; /* Oops on errors */
	391	unsigned int ar_upgrade:1; /* Upgrade ondisk format */
	392	unsigned int ar_posix_acl:1; /* Enable posix acls */
	393	unsigned int ar_quota:2; /* off/account/on */
	394	unsigned int ar_suiddir:1; /* suiddir support */
	395	unsigned int ar_data:2; /* ordered/writeback */
	396	unsigned int ar_meta:1; /* mount metafs */
	397	unsigned int ar_num_glockd; /* Number of glockd threads */
b3b94faa DT	398	};
	399
	400	struct gfs2_tune {
	401	spinlock_t gt_spin;
	402
b3b94faa DT	403	unsigned int gt_demote_secs; /* Cache retention for unheld glock */
	404	unsigned int gt_incore_log_blocks;
	405	unsigned int gt_log_flush_secs;
b3b94faa	406
b3b94faa DT	407	unsigned int gt_recoverd_secs;
	408	unsigned int gt_logd_secs;
	409	unsigned int gt_quotad_secs;
b3b94faa DT	410
	411	unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
	412	unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
	413	unsigned int gt_quota_scale_num; /* Numerator */
	414	unsigned int gt_quota_scale_den; /* Denominator */
	415	unsigned int gt_quota_cache_secs;
	416	unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
b3b94faa	417	unsigned int gt_new_files_jdata;
b3b94faa	418	unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
b3b94faa DT	419	unsigned int gt_stall_secs; /* Detects trouble! */
b3b94faa DT	420	unsigned int gt_complain_secs;
b3b94faa DT	421	unsigned int gt_statfs_quantum;
	422	unsigned int gt_statfs_slow;
	423	};
	424
b3b94faa DT	425	enum {
	426	SDF_JOURNAL_CHECKED = 0,
	427	SDF_JOURNAL_LIVE = 1,
	428	SDF_SHUTDOWN = 2,
254db57f	429	SDF_NOBARRIERS = 3,
b3b94faa DT	430	};
b3b94faa DT	431
b3b94faa DT	432	#define GFS2_FSNAME_LEN 256
b3b94faa DT	433
bb8d8a6f SW	434	struct gfs2_inum_host {
	435	u64 no_formal_ino;
	436	u64 no_addr;
	437	};
	438
	439	struct gfs2_sb_host {
	440	u32 sb_magic;
	441	u32 sb_type;
	442	u32 sb_format;
	443
	444	u32 sb_fs_format;
	445	u32 sb_multihost_format;
	446	u32 sb_bsize;
	447	u32 sb_bsize_shift;
	448
	449	struct gfs2_inum_host sb_master_dir;
	450	struct gfs2_inum_host sb_root_dir;
	451
	452	char sb_lockproto[GFS2_LOCKNAME_LEN];
	453	char sb_locktable[GFS2_LOCKNAME_LEN];
	454	};
	455
b3b94faa DT	456	struct gfs2_sbd {
	457	struct super_block *sd_vfs;
	458	struct kobject sd_kobj;
	459	unsigned long sd_flags; /* SDF_... */
f50dfaf7	460	struct gfs2_sb_host sd_sb;
b3b94faa DT	461
	462	/* Constants computed on mount */
	463
cd915493 SW	464	u32 sd_fsb2bb;
	465	u32 sd_fsb2bb_shift;
	466	u32 sd_diptrs; /* Number of pointers in a dinode */
	467	u32 sd_inptrs; /* Number of pointers in a indirect block */
	468	u32 sd_jbsize; /* Size of a journaled data block */
	469	u32 sd_hash_bsize; /* sizeof(exhash block) */
	470	u32 sd_hash_bsize_shift;
	471	u32 sd_hash_ptrs; /* Number of pointers in a hash block */
	472	u32 sd_qc_per_block;
	473	u32 sd_max_dirres; /* Max blocks needed to add a directory entry */
	474	u32 sd_max_height; /* Max height of a file's metadata tree */
ecc30c79	475	u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
cd915493	476	u32 sd_max_jheight; /* Max height of journaled file's meta tree */
ecc30c79	477	u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1];
b3b94faa DT	478
	479	struct gfs2_args sd_args; /* Mount arguments */
	480	struct gfs2_tune sd_tune; /* Filesystem tuning structure */
	481
	482	/* Lock Stuff */
	483
	484	struct lm_lockstruct sd_lockstruct;
b3b94faa DT	485	struct list_head sd_reclaim_list;
	486	spinlock_t sd_reclaim_lock;
	487	wait_queue_head_t sd_reclaim_wq;
	488	atomic_t sd_reclaim_count;
	489	struct gfs2_holder sd_live_gh;
	490	struct gfs2_glock *sd_rename_gl;
	491	struct gfs2_glock *sd_trans_gl;
b3b94faa DT	492
	493	/* Inode Stuff */
	494
9b8df98f SW	495	struct dentry *sd_master_dir;
	496	struct dentry *sd_root_dir;
	497
f42faf4f SW	498	struct inode *sd_jindex;
	499	struct inode *sd_inum_inode;
	500	struct inode *sd_statfs_inode;
	501	struct inode *sd_ir_inode;
	502	struct inode *sd_sc_inode;
f42faf4f SW	503	struct inode *sd_qc_inode;
	504	struct inode *sd_rindex;
	505	struct inode *sd_quota_inode;
b3b94faa DT	506
	507	/* Inum stuff */
	508
f55ab26a	509	struct mutex sd_inum_mutex;
b3b94faa DT	510
	511	/* StatFS stuff */
	512
	513	spinlock_t sd_statfs_spin;
bd209cc0 AV	514	struct gfs2_statfs_change_host sd_statfs_master;
bd209cc0 AV	515	struct gfs2_statfs_change_host sd_statfs_local;
b3b94faa DT	516	unsigned long sd_statfs_sync_time;
	517
	518	/* Resource group stuff */
	519
cf45b752	520	int sd_rindex_uptodate;
b3b94faa	521	spinlock_t sd_rindex_spin;
f55ab26a	522	struct mutex sd_rindex_mutex;
b3b94faa DT	523	struct list_head sd_rindex_list;
b3b94faa DT	524	struct list_head sd_rindex_mru_list;
b3b94faa DT	525	struct gfs2_rgrpd *sd_rindex_forward;
	526	unsigned int sd_rgrps;
	527
	528	/* Journal index stuff */
	529
	530	struct list_head sd_jindex_list;
	531	spinlock_t sd_jindex_spin;
f55ab26a	532	struct mutex sd_jindex_mutex;
b3b94faa DT	533	unsigned int sd_journals;
	534	unsigned long sd_jindex_refresh_time;
	535
	536	struct gfs2_jdesc *sd_jdesc;
	537	struct gfs2_holder sd_journal_gh;
	538	struct gfs2_holder sd_jinode_gh;
	539
	540	struct gfs2_holder sd_ir_gh;
	541	struct gfs2_holder sd_sc_gh;
b3b94faa DT	542	struct gfs2_holder sd_qc_gh;
	543
	544	/* Daemon stuff */
	545
b3b94faa DT	546	struct task_struct *sd_recoverd_process;
	547	struct task_struct *sd_logd_process;
	548	struct task_struct *sd_quotad_process;
b3b94faa DT	549	struct task_struct *sd_glockd_process[GFS2_GLOCKD_MAX];
	550	unsigned int sd_glockd_num;
	551
b3b94faa DT	552	/* Quota stuff */
	553
	554	struct list_head sd_quota_list;
	555	atomic_t sd_quota_count;
	556	spinlock_t sd_quota_spin;
f55ab26a	557	struct mutex sd_quota_mutex;
b3b94faa DT	558
	559	unsigned int sd_quota_slots;
	560	unsigned int sd_quota_chunks;
	561	unsigned char **sd_quota_bitmap;
	562
cd915493	563	u64 sd_quota_sync_gen;
b3b94faa DT	564	unsigned long sd_quota_sync_time;
	565
	566	/* Log stuff */
	567
	568	spinlock_t sd_log_lock;
b3b94faa DT	569
	570	unsigned int sd_log_blks_reserved;
	571	unsigned int sd_log_commited_buf;
2332c443	572	unsigned int sd_log_commited_databuf;
b3b94faa DT	573	unsigned int sd_log_commited_revoke;
b3b94faa DT	574
b3b94faa DT	575	unsigned int sd_log_num_buf;
	576	unsigned int sd_log_num_revoke;
	577	unsigned int sd_log_num_rg;
	578	unsigned int sd_log_num_databuf;
f42faf4f	579
b3b94faa DT	580	struct list_head sd_log_le_buf;
	581	struct list_head sd_log_le_revoke;
	582	struct list_head sd_log_le_rg;
	583	struct list_head sd_log_le_databuf;
d7b616e2	584	struct list_head sd_log_le_ordered;
b3b94faa	585
fd041f0b	586	atomic_t sd_log_blks_free;
71b86f56	587	struct mutex sd_log_reserve_mutex;
b3b94faa	588
cd915493	589	u64 sd_log_sequence;
b3b94faa DT	590	unsigned int sd_log_head;
b3b94faa DT	591	unsigned int sd_log_tail;
b3b94faa DT	592	int sd_log_idle;
	593
	594	unsigned long sd_log_flush_time;
484adff8	595	struct rw_semaphore sd_log_flush_lock;
16615be1 SW	596	atomic_t sd_log_in_flight;
16615be1 SW	597	wait_queue_head_t sd_log_flush_wait;
b3b94faa DT	598
b3b94faa DT	599	unsigned int sd_log_flush_head;
cd915493	600	u64 sd_log_flush_wrapped;
b3b94faa DT	601
	602	struct list_head sd_ail1_list;
	603	struct list_head sd_ail2_list;
cd915493	604	u64 sd_ail_sync_gen;
b3b94faa DT	605
	606	/* Replay stuff */
	607
	608	struct list_head sd_revoke_list;
	609	unsigned int sd_replay_tail;
	610
	611	unsigned int sd_found_blocks;
	612	unsigned int sd_found_revokes;
	613	unsigned int sd_replayed_blocks;
	614
	615	/* For quiescing the filesystem */
	616
	617	struct gfs2_holder sd_freeze_gh;
f55ab26a	618	struct mutex sd_freeze_lock;
b3b94faa DT	619	unsigned int sd_freeze_count;
	620
	621	/* Counters */
	622
b3b94faa	623	atomic_t sd_reclaimed;
b3b94faa DT	624
	625	char sd_fsname[GFS2_FSNAME_LEN];
	626	char sd_table_name[GFS2_FSNAME_LEN];
	627	char sd_proto_name[GFS2_FSNAME_LEN];
	628
	629	/* Debugging crud */
	630
	631	unsigned long sd_last_warning;
5f882096 RP	632	struct dentry debugfs_dir; / debugfs directory */
5f882096 RP	633	struct dentry debugfs_dentry_glocks; / for debugfs */
b3b94faa DT	634	};
	635
	636	#endif /* __INCORE_DOT_H__ */
	637