[mirror_ubuntu-bionic-kernel.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>
#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_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_rgrp_host {
	u32 rg_flags;
	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 list_head rd_recent;	/* Recently used rgrps */
	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;
	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;
	unsigned long rd_flags;
#define GFS2_RDF_CHECK        0x0001          /* Need to check for unlinked inodes */
};

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);
	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;
	const unsigned long go_min_hold_time;
};

enum {
	/* States */
	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;
	pid_t gh_owner_pid;
	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_DEMOTE		= 3,
	GLF_PENDING_DEMOTE	= 4,
	GLF_DIRTY		= 5,
	GLF_DEMOTE_IN_PROGRESS	= 6,
	GLF_LFLUSH		= 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;
	unsigned int gl_demote_state; /* state requested by remote node */
	unsigned long gl_demote_time; /* time of first demote request */
	pid_t gl_owner_pid;
	unsigned long gl_ip;
	struct list_head gl_holders;
	struct list_head gl_waiters1;	/* HIF_MUTEX */
	struct list_head gl_waiters3;	/* HIF_PROMOTE */
	int gl_waiters2;		/* GIF_DEMOTE */

	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;
	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;
};

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,
};

struct gfs2_dinode_host {
	u64 di_size;		/* number of bytes in file */
	u64 di_blocks;		/* number of blocks in file */
	u64 di_goal_meta;	/* rgrp to alloc from next */
	u64 di_goal_data;	/* data block goal */
	u64 di_generation;	/* generation number for NFS */
	u32 di_flags;		/* GFS2_DIF_... */
	u16 di_height;		/* height of metadata */
	/* These only apply to directories  */
	u16 di_depth;		/* Number of bits in the table */
	u32 di_entries;		/* The number of entries in the directory */
	u64 di_eattr;		/* extended attribute block number */
};

struct gfs2_inode {
	struct inode i_inode;
	u64 i_no_addr;
	u64 i_no_formal_ino;
	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;
};

/*
 * 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_jdesc {
	struct list_head jd_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 */
	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_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_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_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_NOATIME		= 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 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_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;

	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;
	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_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_dir;    /* debugfs directory */
	struct dentry *debugfs_dentry_glocks; /* for debugfs */
};

#endif /* __INCORE_DOT_H__ */
Commit	Line	Data
	1	/*
	2	* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
	3	* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
	4	*
	5	* This copyrighted material is made available to anyone wishing to use,
	6	* modify, copy, or redistribute it subject to the terms and conditions
	7	* of the GNU General Public License version 2.
	8	*/
	9
	10	#ifndef __INCORE_DOT_H__
	11	#define __INCORE_DOT_H__
	12
	13	#include <linux/fs.h>
	14	#include <linux/workqueue.h>
	15
	16	#define DIO_WAIT 0x00000010
	17	#define DIO_METADATA 0x00000020
	18	#define DIO_ALL 0x00000100
	19
	20	struct gfs2_log_operations;
	21	struct gfs2_log_element;
	22	struct gfs2_holder;
	23	struct gfs2_glock;
	24	struct gfs2_quota_data;
	25	struct gfs2_trans;
	26	struct gfs2_ail;
	27	struct gfs2_jdesc;
	28	struct gfs2_sbd;
	29
	30	typedef void (gfs2_glop_bh_t) (struct gfs2_glock gl, unsigned int ret);
	31
	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
	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);
	47	void (lo_incore_commit) (struct gfs2_sbd sdp, struct gfs2_trans *tr);
	48	void (lo_before_commit) (struct gfs2_sbd sdp);
	49	void (lo_after_commit) (struct gfs2_sbd sdp, struct gfs2_ail *ai);
	50	void (lo_before_scan) (struct gfs2_jdesc jd,
	51	struct gfs2_log_header_host *head, int pass);
	52	int (lo_scan_elements) (struct gfs2_jdesc jd, unsigned int start,
	53	struct gfs2_log_descriptor ld, __be64 ptr,
	54	int pass);
	55	void (lo_after_scan) (struct gfs2_jdesc jd, int error, int pass);
	56	const char *lo_name;
	57	};
	58
	59	struct gfs2_log_element {
	60	struct list_head le_list;
	61	const struct gfs2_log_operations *le_ops;
	62	};
	63
	64	struct gfs2_bitmap {
	65	struct buffer_head *bi_bh;
	66	char *bi_clone;
	67	u32 bi_offset;
	68	u32 bi_start;
	69	u32 bi_len;
	70	};
	71
	72	struct gfs2_rgrp_host {
	73	u32 rg_flags;
	74	u32 rg_free;
	75	u32 rg_dinodes;
	76	u64 rg_igeneration;
	77	};
	78
	79	struct gfs2_rgrpd {
	80	struct list_head rd_list; /* Link with superblock */
	81	struct list_head rd_list_mru;
	82	struct list_head rd_recent; /* Recently used rgrps */
	83	struct gfs2_glock rd_gl; / Glock for this rgrp */
	84	u64 rd_addr; /* grp block disk address */
	85	u64 rd_data0; /* first data location */
	86	u32 rd_length; /* length of rgrp header in fs blocks */
	87	u32 rd_data; /* num of data blocks in rgrp */
	88	u32 rd_bitbytes; /* number of bytes in data bitmaps */
	89	struct gfs2_rgrp_host rd_rg;
	90	u64 rd_rg_vn;
	91	struct gfs2_bitmap *rd_bits;
	92	unsigned int rd_bh_count;
	93	struct mutex rd_mutex;
	94	u32 rd_free_clone;
	95	struct gfs2_log_element rd_le;
	96	u32 rd_last_alloc_data;
	97	u32 rd_last_alloc_meta;
	98	struct gfs2_sbd *rd_sbd;
	99	unsigned long rd_flags;
	100	#define GFS2_RDF_CHECK 0x0001 /* Need to check for unlinked inodes */
	101	};
	102
	103	enum gfs2_state_bits {
	104	BH_Pinned = BH_PrivateStart,
	105	BH_Escaped = BH_PrivateStart + 1,
	106	};
	107
	108	BUFFER_FNS(Pinned, pinned)
	109	TAS_BUFFER_FNS(Pinned, pinned)
	110	BUFFER_FNS(Escaped, escaped)
	111	TAS_BUFFER_FNS(Escaped, escaped)
	112
	113	struct gfs2_bufdata {
	114	struct buffer_head *bd_bh;
	115	struct gfs2_glock *bd_gl;
	116
	117	union {
	118	struct list_head list_tr;
	119	u64 blkno;
	120	} u;
	121	#define bd_list_tr u.list_tr
	122	#define bd_blkno u.blkno
	123
	124	struct gfs2_log_element bd_le;
	125
	126	struct gfs2_ail *bd_ail;
	127	struct list_head bd_ail_st_list;
	128	struct list_head bd_ail_gl_list;
	129	};
	130
	131	struct gfs2_glock_operations {
	132	void (go_xmote_th) (struct gfs2_glock gl);
	133	void (go_xmote_bh) (struct gfs2_glock gl);
	134	void (go_drop_th) (struct gfs2_glock gl);
	135	void (go_inval) (struct gfs2_glock gl, int flags);
	136	int (go_demote_ok) (struct gfs2_glock gl);
	137	int (go_lock) (struct gfs2_holder gh);
	138	void (go_unlock) (struct gfs2_holder gh);
	139	const int go_type;
	140	const unsigned long go_min_hold_time;
	141	};
	142
	143	enum {
	144	/* States */
	145	HIF_HOLDER = 6,
	146	HIF_FIRST = 7,
	147	HIF_ABORTED = 9,
	148	HIF_WAIT = 10,
	149	};
	150
	151	struct gfs2_holder {
	152	struct list_head gh_list;
	153
	154	struct gfs2_glock *gh_gl;
	155	pid_t gh_owner_pid;
	156	unsigned int gh_state;
	157	unsigned gh_flags;
	158
	159	int gh_error;
	160	unsigned long gh_iflags;
	161	unsigned long gh_ip;
	162	};
	163
	164	enum {
	165	GLF_LOCK = 1,
	166	GLF_STICKY = 2,
	167	GLF_DEMOTE = 3,
	168	GLF_PENDING_DEMOTE = 4,
	169	GLF_DIRTY = 5,
	170	GLF_DEMOTE_IN_PROGRESS = 6,
	171	GLF_LFLUSH = 7,
	172	};
	173
	174	struct gfs2_glock {
	175	struct hlist_node gl_list;
	176	unsigned long gl_flags; /* GLF_... */
	177	struct lm_lockname gl_name;
	178	atomic_t gl_ref;
	179
	180	spinlock_t gl_spin;
	181
	182	unsigned int gl_state;
	183	unsigned int gl_hash;
	184	unsigned int gl_demote_state; /* state requested by remote node */
	185	unsigned long gl_demote_time; /* time of first demote request */
	186	pid_t gl_owner_pid;
	187	unsigned long gl_ip;
	188	struct list_head gl_holders;
	189	struct list_head gl_waiters1; /* HIF_MUTEX */
	190	struct list_head gl_waiters3; /* HIF_PROMOTE */
	191	int gl_waiters2; /* GIF_DEMOTE */
	192
	193	const struct gfs2_glock_operations *gl_ops;
	194
	195	struct gfs2_holder *gl_req_gh;
	196	gfs2_glop_bh_t gl_req_bh;
	197
	198	void *gl_lock;
	199	char *gl_lvb;
	200	atomic_t gl_lvb_count;
	201
	202	u64 gl_vn;
	203	unsigned long gl_stamp;
	204	unsigned long gl_tchange;
	205	void *gl_object;
	206
	207	struct list_head gl_reclaim;
	208
	209	struct gfs2_sbd *gl_sbd;
	210
	211	struct inode *gl_aspace;
	212	struct list_head gl_ail_list;
	213	atomic_t gl_ail_count;
	214	struct delayed_work gl_work;
	215	};
	216
	217	struct gfs2_alloc {
	218	/* Quota stuff */
	219
	220	struct gfs2_quota_data al_qd[2MAXQUOTAS];
	221	struct gfs2_holder al_qd_ghs[2*MAXQUOTAS];
	222	unsigned int al_qd_num;
	223
	224	u32 al_requested; /* Filled in by caller of gfs2_inplace_reserve() */
	225	u32 al_alloced; /* Filled in by gfs2_alloc_() /
	226
	227	/* Filled in by gfs2_inplace_reserve() */
	228
	229	unsigned int al_line;
	230	char *al_file;
	231	struct gfs2_holder al_ri_gh;
	232	struct gfs2_holder al_rgd_gh;
	233	struct gfs2_rgrpd *al_rgd;
	234
	235	};
	236
	237	enum {
	238	GIF_INVALID = 0,
	239	GIF_QD_LOCKED = 1,
	240	GIF_SW_PAGED = 3,
	241	};
	242
	243	struct gfs2_dinode_host {
	244	u64 di_size; /* number of bytes in file */
	245	u64 di_blocks; /* number of blocks in file */
	246	u64 di_goal_meta; /* rgrp to alloc from next */
	247	u64 di_goal_data; /* data block goal */
	248	u64 di_generation; /* generation number for NFS */
	249	u32 di_flags; /* GFS2_DIF_... */
	250	u16 di_height; /* height of metadata */
	251	/* These only apply to directories */
	252	u16 di_depth; /* Number of bits in the table */
	253	u32 di_entries; /* The number of entries in the directory */
	254	u64 di_eattr; /* extended attribute block number */
	255	};
	256
	257	struct gfs2_inode {
	258	struct inode i_inode;
	259	u64 i_no_addr;
	260	u64 i_no_formal_ino;
	261	unsigned long i_flags; /* GIF_... */
	262
	263	struct gfs2_dinode_host i_di; /* To be replaced by ref to block */
	264
	265	struct gfs2_glock i_gl; / Move into i_gh? */
	266	struct gfs2_holder i_iopen_gh;
	267	struct gfs2_holder i_gh; /* for prepare/commit_write only */
	268	struct gfs2_alloc i_alloc;
	269	u64 i_last_rg_alloc;
	270
	271	spinlock_t i_spin;
	272	struct rw_semaphore i_rw_mutex;
	273	};
	274
	275	/*
	276	* Since i_inode is the first element of struct gfs2_inode,
	277	* this is effectively a cast.
	278	*/
	279	static inline struct gfs2_inode GFS2_I(struct inode inode)
	280	{
	281	return container_of(inode, struct gfs2_inode, i_inode);
	282	}
	283
	284	static inline struct gfs2_sbd GFS2_SB(const struct inode inode)
	285	{
	286	return inode->i_sb->s_fs_info;
	287	}
	288
	289	struct gfs2_file {
	290	struct mutex f_fl_mutex;
	291	struct gfs2_holder f_fl_gh;
	292	};
	293
	294	struct gfs2_revoke_replay {
	295	struct list_head rr_list;
	296	u64 rr_blkno;
	297	unsigned int rr_where;
	298	};
	299
	300	enum {
	301	QDF_USER = 0,
	302	QDF_CHANGE = 1,
	303	QDF_LOCKED = 2,
	304	};
	305
	306	struct gfs2_quota_data {
	307	struct list_head qd_list;
	308	unsigned int qd_count;
	309
	310	u32 qd_id;
	311	unsigned long qd_flags; /* QDF_... */
	312
	313	s64 qd_change;
	314	s64 qd_change_sync;
	315
	316	unsigned int qd_slot;
	317	unsigned int qd_slot_count;
	318
	319	struct buffer_head *qd_bh;
	320	struct gfs2_quota_change *qd_bh_qc;
	321	unsigned int qd_bh_count;
	322
	323	struct gfs2_glock *qd_gl;
	324	struct gfs2_quota_lvb qd_qb;
	325
	326	u64 qd_sync_gen;
	327	unsigned long qd_last_warn;
	328	unsigned long qd_last_touched;
	329	};
	330
	331	struct gfs2_trans {
	332	unsigned long tr_ip;
	333
	334	unsigned int tr_blocks;
	335	unsigned int tr_revokes;
	336	unsigned int tr_reserved;
	337
	338	struct gfs2_holder tr_t_gh;
	339
	340	int tr_touched;
	341
	342	unsigned int tr_num_buf;
	343	unsigned int tr_num_buf_new;
	344	unsigned int tr_num_databuf_new;
	345	unsigned int tr_num_buf_rm;
	346	unsigned int tr_num_databuf_rm;
	347	struct list_head tr_list_buf;
	348
	349	unsigned int tr_num_revoke;
	350	unsigned int tr_num_revoke_rm;
	351	};
	352
	353	struct gfs2_ail {
	354	struct list_head ai_list;
	355
	356	unsigned int ai_first;
	357	struct list_head ai_ail1_list;
	358	struct list_head ai_ail2_list;
	359
	360	u64 ai_sync_gen;
	361	};
	362
	363	struct gfs2_jdesc {
	364	struct list_head jd_list;
	365
	366	struct inode *jd_inode;
	367	unsigned int jd_jid;
	368	int jd_dirty;
	369
	370	unsigned int jd_blocks;
	371	};
	372
	373	struct gfs2_statfs_change_host {
	374	s64 sc_total;
	375	s64 sc_free;
	376	s64 sc_dinodes;
	377	};
	378
	379	#define GFS2_GLOCKD_DEFAULT 1
	380	#define GFS2_GLOCKD_MAX 16
	381
	382	#define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF
	383	#define GFS2_QUOTA_OFF 0
	384	#define GFS2_QUOTA_ACCOUNT 1
	385	#define GFS2_QUOTA_ON 2
	386
	387	#define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED
	388	#define GFS2_DATA_WRITEBACK 1
	389	#define GFS2_DATA_ORDERED 2
	390
	391	struct gfs2_args {
	392	char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
	393	char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
	394	char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
	395	int ar_spectator; /* Don't get a journal because we're always RO */
	396	int ar_ignore_local_fs; /* Don't optimize even if local_fs is 1 */
	397	int ar_localflocks; /* Let the VFS do flock\|fcntl locks for us */
	398	int ar_localcaching; /* Local-style caching (dangerous on multihost) */
	399	int ar_debug; /* Oops on errors instead of trying to be graceful */
	400	int ar_upgrade; /* Upgrade ondisk/multihost format */
	401	unsigned int ar_num_glockd; /* Number of glockd threads */
	402	int ar_posix_acl; /* Enable posix acls */
	403	int ar_quota; /* off/account/on */
	404	int ar_suiddir; /* suiddir support */
	405	int ar_data; /* ordered/writeback */
	406	};
	407
	408	struct gfs2_tune {
	409	spinlock_t gt_spin;
	410
	411	unsigned int gt_demote_secs; /* Cache retention for unheld glock */
	412	unsigned int gt_incore_log_blocks;
	413	unsigned int gt_log_flush_secs;
	414	unsigned int gt_jindex_refresh_secs; /* Check for new journal index */
	415
	416	unsigned int gt_recoverd_secs;
	417	unsigned int gt_logd_secs;
	418	unsigned int gt_quotad_secs;
	419
	420	unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
	421	unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
	422	unsigned int gt_quota_scale_num; /* Numerator */
	423	unsigned int gt_quota_scale_den; /* Denominator */
	424	unsigned int gt_quota_cache_secs;
	425	unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
	426	unsigned int gt_atime_quantum; /* Min secs between atime updates */
	427	unsigned int gt_new_files_jdata;
	428	unsigned int gt_new_files_directio;
	429	unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
	430	unsigned int gt_stall_secs; /* Detects trouble! */
	431	unsigned int gt_complain_secs;
	432	unsigned int gt_statfs_quantum;
	433	unsigned int gt_statfs_slow;
	434	};
	435
	436	enum {
	437	SDF_JOURNAL_CHECKED = 0,
	438	SDF_JOURNAL_LIVE = 1,
	439	SDF_SHUTDOWN = 2,
	440	SDF_NOATIME = 3,
	441	};
	442
	443	#define GFS2_FSNAME_LEN 256
	444
	445	struct gfs2_inum_host {
	446	u64 no_formal_ino;
	447	u64 no_addr;
	448	};
	449
	450	struct gfs2_sb_host {
	451	u32 sb_magic;
	452	u32 sb_type;
	453	u32 sb_format;
	454
	455	u32 sb_fs_format;
	456	u32 sb_multihost_format;
	457	u32 sb_bsize;
	458	u32 sb_bsize_shift;
	459
	460	struct gfs2_inum_host sb_master_dir;
	461	struct gfs2_inum_host sb_root_dir;
	462
	463	char sb_lockproto[GFS2_LOCKNAME_LEN];
	464	char sb_locktable[GFS2_LOCKNAME_LEN];
	465	};
	466
	467	struct gfs2_sbd {
	468	struct super_block *sd_vfs;
	469	struct super_block *sd_vfs_meta;
	470	struct kobject sd_kobj;
	471	unsigned long sd_flags; /* SDF_... */
	472	struct gfs2_sb_host sd_sb;
	473
	474	/* Constants computed on mount */
	475
	476	u32 sd_fsb2bb;
	477	u32 sd_fsb2bb_shift;
	478	u32 sd_diptrs; /* Number of pointers in a dinode */
	479	u32 sd_inptrs; /* Number of pointers in a indirect block */
	480	u32 sd_jbsize; /* Size of a journaled data block */
	481	u32 sd_hash_bsize; /* sizeof(exhash block) */
	482	u32 sd_hash_bsize_shift;
	483	u32 sd_hash_ptrs; /* Number of pointers in a hash block */
	484	u32 sd_qc_per_block;
	485	u32 sd_max_dirres; /* Max blocks needed to add a directory entry */
	486	u32 sd_max_height; /* Max height of a file's metadata tree */
	487	u64 sd_heightsize[GFS2_MAX_META_HEIGHT];
	488	u32 sd_max_jheight; /* Max height of journaled file's meta tree */
	489	u64 sd_jheightsize[GFS2_MAX_META_HEIGHT];
	490
	491	struct gfs2_args sd_args; /* Mount arguments */
	492	struct gfs2_tune sd_tune; /* Filesystem tuning structure */
	493
	494	/* Lock Stuff */
	495
	496	struct lm_lockstruct sd_lockstruct;
	497	struct list_head sd_reclaim_list;
	498	spinlock_t sd_reclaim_lock;
	499	wait_queue_head_t sd_reclaim_wq;
	500	atomic_t sd_reclaim_count;
	501	struct gfs2_holder sd_live_gh;
	502	struct gfs2_glock *sd_rename_gl;
	503	struct gfs2_glock *sd_trans_gl;
	504
	505	/* Inode Stuff */
	506
	507	struct inode *sd_master_dir;
	508	struct inode *sd_jindex;
	509	struct inode *sd_inum_inode;
	510	struct inode *sd_statfs_inode;
	511	struct inode *sd_ir_inode;
	512	struct inode *sd_sc_inode;
	513	struct inode *sd_qc_inode;
	514	struct inode *sd_rindex;
	515	struct inode *sd_quota_inode;
	516
	517	/* Inum stuff */
	518
	519	struct mutex sd_inum_mutex;
	520
	521	/* StatFS stuff */
	522
	523	spinlock_t sd_statfs_spin;
	524	struct mutex sd_statfs_mutex;
	525	struct gfs2_statfs_change_host sd_statfs_master;
	526	struct gfs2_statfs_change_host sd_statfs_local;
	527	unsigned long sd_statfs_sync_time;
	528
	529	/* Resource group stuff */
	530
	531	u64 sd_rindex_vn;
	532	spinlock_t sd_rindex_spin;
	533	struct mutex sd_rindex_mutex;
	534	struct list_head sd_rindex_list;
	535	struct list_head sd_rindex_mru_list;
	536	struct list_head sd_rindex_recent_list;
	537	struct gfs2_rgrpd *sd_rindex_forward;
	538	unsigned int sd_rgrps;
	539
	540	/* Journal index stuff */
	541
	542	struct list_head sd_jindex_list;
	543	spinlock_t sd_jindex_spin;
	544	struct mutex sd_jindex_mutex;
	545	unsigned int sd_journals;
	546	unsigned long sd_jindex_refresh_time;
	547
	548	struct gfs2_jdesc *sd_jdesc;
	549	struct gfs2_holder sd_journal_gh;
	550	struct gfs2_holder sd_jinode_gh;
	551
	552	struct gfs2_holder sd_ir_gh;
	553	struct gfs2_holder sd_sc_gh;
	554	struct gfs2_holder sd_qc_gh;
	555
	556	/* Daemon stuff */
	557
	558	struct task_struct *sd_recoverd_process;
	559	struct task_struct *sd_logd_process;
	560	struct task_struct *sd_quotad_process;
	561	struct task_struct *sd_glockd_process[GFS2_GLOCKD_MAX];
	562	unsigned int sd_glockd_num;
	563
	564	/* Quota stuff */
	565
	566	struct list_head sd_quota_list;
	567	atomic_t sd_quota_count;
	568	spinlock_t sd_quota_spin;
	569	struct mutex sd_quota_mutex;
	570
	571	unsigned int sd_quota_slots;
	572	unsigned int sd_quota_chunks;
	573	unsigned char **sd_quota_bitmap;
	574
	575	u64 sd_quota_sync_gen;
	576	unsigned long sd_quota_sync_time;
	577
	578	/* Log stuff */
	579
	580	spinlock_t sd_log_lock;
	581
	582	unsigned int sd_log_blks_reserved;
	583	unsigned int sd_log_commited_buf;
	584	unsigned int sd_log_commited_databuf;
	585	unsigned int sd_log_commited_revoke;
	586
	587	unsigned int sd_log_num_buf;
	588	unsigned int sd_log_num_revoke;
	589	unsigned int sd_log_num_rg;
	590	unsigned int sd_log_num_databuf;
	591
	592	struct list_head sd_log_le_buf;
	593	struct list_head sd_log_le_revoke;
	594	struct list_head sd_log_le_rg;
	595	struct list_head sd_log_le_databuf;
	596	struct list_head sd_log_le_ordered;
	597
	598	unsigned int sd_log_blks_free;
	599	struct mutex sd_log_reserve_mutex;
	600
	601	u64 sd_log_sequence;
	602	unsigned int sd_log_head;
	603	unsigned int sd_log_tail;
	604	int sd_log_idle;
	605
	606	unsigned long sd_log_flush_time;
	607	struct rw_semaphore sd_log_flush_lock;
	608	atomic_t sd_log_in_flight;
	609	wait_queue_head_t sd_log_flush_wait;
	610
	611	unsigned int sd_log_flush_head;
	612	u64 sd_log_flush_wrapped;
	613
	614	struct list_head sd_ail1_list;
	615	struct list_head sd_ail2_list;
	616	u64 sd_ail_sync_gen;
	617
	618	/* Replay stuff */
	619
	620	struct list_head sd_revoke_list;
	621	unsigned int sd_replay_tail;
	622
	623	unsigned int sd_found_blocks;
	624	unsigned int sd_found_revokes;
	625	unsigned int sd_replayed_blocks;
	626
	627	/* For quiescing the filesystem */
	628
	629	struct gfs2_holder sd_freeze_gh;
	630	struct mutex sd_freeze_lock;
	631	unsigned int sd_freeze_count;
	632
	633	/* Counters */
	634
	635	atomic_t sd_glock_count;
	636	atomic_t sd_glock_held_count;
	637	atomic_t sd_inode_count;
	638	atomic_t sd_reclaimed;
	639
	640	char sd_fsname[GFS2_FSNAME_LEN];
	641	char sd_table_name[GFS2_FSNAME_LEN];
	642	char sd_proto_name[GFS2_FSNAME_LEN];
	643
	644	/* Debugging crud */
	645
	646	unsigned long sd_last_warning;
	647	struct vfsmount *sd_gfs2mnt;
	648	struct dentry debugfs_dir; / debugfs directory */
	649	struct dentry debugfs_dentry_glocks; / for debugfs */
	650	};
	651
	652	#endif /* __INCORE_DOT_H__ */
	653