fs/gfs2/incore.h - kernel/msm-4.19 - Gitiles

 /*
  * 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_dinode_host {
 	u64 di_size;		/* number of bytes in file */
 	u64 di_generation;	/* generation number for NFS */
 	u32 di_flags;		/* GFS2_DIF_... */
 	/* These only apply to directories  */
 	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_goal;	/* goal block for allocations */
 	struct rw_semaphore i_rw_mutex;
 	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,
 };

 #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__ */
	/*
	* 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[2MAXQUOTAS];
	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_dinode_host {
	u64 di_size; /* number of bytes in file */
	u64 di_generation; /* generation number for NFS */
	u32 di_flags; /* GFS2_DIF_... */
	/* These only apply to directories */
	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_goal; /* goal block for allocations */
	struct rw_semaphore i_rw_mutex;
	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,
	};

	#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__ */