[linux-2.6-block.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_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 */
	u32 rd_free;
	u32 rd_free_clone;
	u32 rd_dinodes;
	u64 rd_igeneration;
	struct gfs2_bitmap *rd_bits;
	struct mutex rd_mutex;
	struct gfs2_log_element rd_le;
	struct gfs2_sbd *rd_sbd;
	unsigned int rd_bh_count;
	u32 rd_last_alloc;
	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) (const 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_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_lru;

	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;
	struct list_head i_trunc_list;
	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_incore_log_blocks;
	unsigned int gt_log_flush_secs;

	unsigned int gt_recoverd_secs;
	unsigned int gt_logd_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 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;

	/* 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;

	/* Quota stuff */

	struct list_head sd_quota_list;
	atomic_t sd_quota_count;
	spinlock_t sd_quota_spin;
	struct mutex sd_quota_mutex;
	wait_queue_head_t sd_quota_wait;
	struct list_head sd_trunc_list;
	spinlock_t sd_trunc_lock;

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

	u64 sd_quota_sync_gen;

	/* 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;

	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	};
	70
	71	struct gfs2_rgrpd {
	72	struct list_head rd_list; /* Link with superblock */
	73	struct list_head rd_list_mru;
b3b94faa	74	struct gfs2_glock rd_gl; / Glock for this rgrp */
bb8d8a6f SW	75	u64 rd_addr; /* grp block disk address */
	76	u64 rd_data0; /* first data location */
	77	u32 rd_length; /* length of rgrp header in fs blocks */
	78	u32 rd_data; /* num of data blocks in rgrp */
	79	u32 rd_bitbytes; /* number of bytes in data bitmaps */
cfc8b549	80	u32 rd_free;
73f74948 SW	81	u32 rd_free_clone;
73f74948 SW	82	u32 rd_dinodes;
d8b71f73	83	u64 rd_igeneration;
b3b94faa	84	struct gfs2_bitmap *rd_bits;
f55ab26a	85	struct mutex rd_mutex;
b3b94faa	86	struct gfs2_log_element rd_le;
b3b94faa	87	struct gfs2_sbd *rd_sbd;
73f74948 SW	88	unsigned int rd_bh_count;
73f74948 SW	89	u32 rd_last_alloc;
42d52e38 BP	90	unsigned char rd_flags;
	91	#define GFS2_RDF_CHECK 0x01 /* Need to check for unlinked inodes */
	92	#define GFS2_RDF_NOALLOC 0x02 /* rg prohibits allocation */
cf45b752	93	#define GFS2_RDF_UPTODATE 0x04 /* rg is up to date */
b3b94faa DT	94	};
	95
	96	enum gfs2_state_bits {
	97	BH_Pinned = BH_PrivateStart,
f42faf4f	98	BH_Escaped = BH_PrivateStart + 1,
b3b94faa DT	99	};
	100
	101	BUFFER_FNS(Pinned, pinned)
	102	TAS_BUFFER_FNS(Pinned, pinned)
f42faf4f SW	103	BUFFER_FNS(Escaped, escaped)
f42faf4f SW	104	TAS_BUFFER_FNS(Escaped, escaped)
b3b94faa DT	105
	106	struct gfs2_bufdata {
	107	struct buffer_head *bd_bh;
	108	struct gfs2_glock *bd_gl;
	109
82e86087 SW	110	union {
	111	struct list_head list_tr;
	112	u64 blkno;
	113	} u;
	114	#define bd_list_tr u.list_tr
	115	#define bd_blkno u.blkno
	116
b3b94faa DT	117	struct gfs2_log_element bd_le;
	118
	119	struct gfs2_ail *bd_ail;
	120	struct list_head bd_ail_st_list;
	121	struct list_head bd_ail_gl_list;
	122	};
	123
b3b94faa	124	struct gfs2_glock_operations {
b5d32bea	125	void (go_xmote_th) (struct gfs2_glock gl);
6802e340	126	int (go_xmote_bh) (struct gfs2_glock gl, struct gfs2_holder *gh);
1a14d3a6	127	void (go_inval) (struct gfs2_glock gl, int flags);
97cc1025	128	int (go_demote_ok) (const struct gfs2_glock gl);
1a14d3a6 SW	129	int (go_lock) (struct gfs2_holder gh);
1a14d3a6 SW	130	void (go_unlock) (struct gfs2_holder gh);
6802e340	131	int (go_dump)(struct seq_file seq, const struct gfs2_glock *gl);
8fb4b536	132	const int go_type;
c4f68a13	133	const unsigned long go_min_hold_time;
b3b94faa DT	134	};
	135
	136	enum {
b3b94faa	137	/* States */
6802e340	138	HIF_HOLDER = 6, /* Set for gh that "holds" the glock */
b3b94faa	139	HIF_FIRST = 7,
fee852e3	140	HIF_WAIT = 10,
b3b94faa DT	141	};
	142
	143	struct gfs2_holder {
	144	struct list_head gh_list;
	145
	146	struct gfs2_glock *gh_gl;
b1e058da	147	struct pid *gh_owner_pid;
b3b94faa	148	unsigned int gh_state;
fe1bdedc	149	unsigned gh_flags;
b3b94faa DT	150
b3b94faa DT	151	int gh_error;
6802e340	152	unsigned long gh_iflags; /* HIF_... */
d0dc80db	153	unsigned long gh_ip;
b3b94faa DT	154	};
	155
	156	enum {
6802e340	157	GLF_LOCK = 1,
6802e340 SW	158	GLF_DEMOTE = 3,
	159	GLF_PENDING_DEMOTE = 4,
	160	GLF_DEMOTE_IN_PROGRESS = 5,
	161	GLF_DIRTY = 6,
	162	GLF_LFLUSH = 7,
	163	GLF_INVALIDATE_IN_PROGRESS = 8,
	164	GLF_REPLY_PENDING = 9,
b3b94faa DT	165	};
	166
	167	struct gfs2_glock {
b6397893	168	struct hlist_node gl_list;
b3b94faa DT	169	unsigned long gl_flags; /* GLF_... */
b3b94faa DT	170	struct lm_lockname gl_name;
16feb9fe	171	atomic_t gl_ref;
b3b94faa DT	172
	173	spinlock_t gl_spin;
	174
	175	unsigned int gl_state;
6802e340 SW	176	unsigned int gl_target;
6802e340 SW	177	unsigned int gl_reply;
37b2fa6a	178	unsigned int gl_hash;
3b8249f6 SW	179	unsigned int gl_demote_state; /* state requested by remote node */
3b8249f6 SW	180	unsigned long gl_demote_time; /* time of first demote request */
b3b94faa	181	struct list_head gl_holders;
b3b94faa	182
8fb4b536	183	const struct gfs2_glock_operations *gl_ops;
9b47c11d	184	void *gl_lock;
b3b94faa DT	185	char *gl_lvb;
	186	atomic_t gl_lvb_count;
	187
b3b94faa	188	unsigned long gl_stamp;
c4f68a13	189	unsigned long gl_tchange;
b3b94faa DT	190	void *gl_object;
b3b94faa DT	191
97cc1025	192	struct list_head gl_lru;
b3b94faa DT	193
	194	struct gfs2_sbd *gl_sbd;
	195
	196	struct inode *gl_aspace;
b3b94faa DT	197	struct list_head gl_ail_list;
b3b94faa DT	198	atomic_t gl_ail_count;
c4f68a13	199	struct delayed_work gl_work;
b3b94faa DT	200	};
b3b94faa DT	201
da755fdb SW	202	#define GFS2_MIN_LVB_SIZE 32 /* Min size of LVB that gfs2 supports */
da755fdb SW	203
b3b94faa DT	204	struct gfs2_alloc {
	205	/* Quota stuff */
	206
e9fc2aa0 SW	207	struct gfs2_quota_data al_qd[2MAXQUOTAS];
e9fc2aa0 SW	208	struct gfs2_holder al_qd_ghs[2*MAXQUOTAS];
6b61b072	209	unsigned int al_qd_num;
b3b94faa	210
6b61b072 SW	211	u32 al_requested; /* Filled in by caller of gfs2_inplace_reserve() */
6b61b072 SW	212	u32 al_alloced; /* Filled in by gfs2_alloc_() /
b3b94faa DT	213
	214	/* Filled in by gfs2_inplace_reserve() */
	215
b3b94faa	216	unsigned int al_line;
6b61b072	217	char *al_file;
b3b94faa DT	218	struct gfs2_holder al_ri_gh;
	219	struct gfs2_holder al_rgd_gh;
	220	struct gfs2_rgrpd *al_rgd;
	221
b3b94faa DT	222	};
	223
	224	enum {
bfded27b	225	GIF_INVALID = 0,
b3b94faa	226	GIF_QD_LOCKED = 1,
b3b94faa	227	GIF_SW_PAGED = 3,
091806ed	228	GIF_USER = 4, /* user inode, not metadata addr space */
b3b94faa DT	229	};
b3b94faa DT	230
bb8d8a6f	231
b3b94faa	232	struct gfs2_inode {
320dd101	233	struct inode i_inode;
dbb7cae2 SW	234	u64 i_no_addr;
dbb7cae2 SW	235	u64 i_no_formal_ino;
bcf0b5b3	236	u64 i_generation;
3767ac21	237	u64 i_eattr;
c9e98886	238	loff_t i_disksize;
b3b94faa	239	unsigned long i_flags; /* GIF_... */
feaa7bba	240	struct gfs2_glock i_gl; / Move into i_gh? */
b3b94faa	241	struct gfs2_holder i_iopen_gh;
f42faf4f	242	struct gfs2_holder i_gh; /* for prepare/commit_write only */
6dbd8224	243	struct gfs2_alloc *i_alloc;
ce276b06	244	u64 i_goal; /* goal block for allocations */
b3b94faa	245	struct rw_semaphore i_rw_mutex;
813e0c46	246	struct list_head i_trunc_list;
ad6203f2	247	u32 i_entries;
383f01fb	248	u32 i_diskflags;
ecc30c79	249	u8 i_height;
9a004508	250	u8 i_depth;
b3b94faa DT	251	};
b3b94faa DT	252
feaa7bba SW	253	/*
	254	* Since i_inode is the first element of struct gfs2_inode,
	255	* this is effectively a cast.
	256	*/
320dd101 SW	257	static inline struct gfs2_inode GFS2_I(struct inode inode)
	258	{
	259	return container_of(inode, struct gfs2_inode, i_inode);
	260	}
	261
bf36a713	262	static inline struct gfs2_sbd GFS2_SB(const struct inode inode)
feaa7bba SW	263	{
	264	return inode->i_sb->s_fs_info;
	265	}
	266
b3b94faa	267	struct gfs2_file {
f55ab26a	268	struct mutex f_fl_mutex;
b3b94faa	269	struct gfs2_holder f_fl_gh;
b3b94faa DT	270	};
b3b94faa DT	271
b3b94faa DT	272	struct gfs2_revoke_replay {
b3b94faa DT	273	struct list_head rr_list;
cd915493	274	u64 rr_blkno;
b3b94faa DT	275	unsigned int rr_where;
	276	};
	277
b3b94faa DT	278	enum {
	279	QDF_USER = 0,
	280	QDF_CHANGE = 1,
	281	QDF_LOCKED = 2,
	282	};
	283
	284	struct gfs2_quota_data {
	285	struct list_head qd_list;
	286	unsigned int qd_count;
	287
cd915493	288	u32 qd_id;
b3b94faa DT	289	unsigned long qd_flags; /* QDF_... */
b3b94faa DT	290
cd915493 SW	291	s64 qd_change;
cd915493 SW	292	s64 qd_change_sync;
b3b94faa DT	293
	294	unsigned int qd_slot;
	295	unsigned int qd_slot_count;
	296
	297	struct buffer_head *qd_bh;
	298	struct gfs2_quota_change *qd_bh_qc;
	299	unsigned int qd_bh_count;
	300
	301	struct gfs2_glock *qd_gl;
	302	struct gfs2_quota_lvb qd_qb;
	303
cd915493	304	u64 qd_sync_gen;
b3b94faa DT	305	unsigned long qd_last_warn;
	306	unsigned long qd_last_touched;
	307	};
	308
b3b94faa	309	struct gfs2_trans {
d0dc80db	310	unsigned long tr_ip;
b3b94faa DT	311
	312	unsigned int tr_blocks;
	313	unsigned int tr_revokes;
	314	unsigned int tr_reserved;
	315
e317ffcb	316	struct gfs2_holder tr_t_gh;
b3b94faa DT	317
	318	int tr_touched;
	319
	320	unsigned int tr_num_buf;
	321	unsigned int tr_num_buf_new;
2332c443	322	unsigned int tr_num_databuf_new;
b3b94faa	323	unsigned int tr_num_buf_rm;
2332c443	324	unsigned int tr_num_databuf_rm;
b3b94faa DT	325	struct list_head tr_list_buf;
	326
	327	unsigned int tr_num_revoke;
	328	unsigned int tr_num_revoke_rm;
	329	};
	330
	331	struct gfs2_ail {
	332	struct list_head ai_list;
	333
	334	unsigned int ai_first;
	335	struct list_head ai_ail1_list;
	336	struct list_head ai_ail2_list;
	337
cd915493	338	u64 ai_sync_gen;
b3b94faa DT	339	};
b3b94faa DT	340
da6dd40d BP	341	struct gfs2_journal_extent {
	342	struct list_head extent_list;
	343
	344	unsigned int lblock; /* First logical block */
	345	u64 dblock; /* First disk block */
	346	u64 blocks;
	347	};
	348
b3b94faa DT	349	struct gfs2_jdesc {
b3b94faa DT	350	struct list_head jd_list;
da6dd40d	351	struct list_head extent_list;
b3b94faa	352
7359a19c	353	struct inode *jd_inode;
b3b94faa DT	354	unsigned int jd_jid;
	355	int jd_dirty;
	356
	357	unsigned int jd_blocks;
	358	};
	359
bb8d8a6f SW	360	struct gfs2_statfs_change_host {
	361	s64 sc_total;
	362	s64 sc_free;
	363	s64 sc_dinodes;
	364	};
	365
b3b94faa DT	366	#define GFS2_GLOCKD_DEFAULT 1
	367	#define GFS2_GLOCKD_MAX 16
	368
	369	#define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF
	370	#define GFS2_QUOTA_OFF 0
	371	#define GFS2_QUOTA_ACCOUNT 1
	372	#define GFS2_QUOTA_ON 2
	373
	374	#define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED
	375	#define GFS2_DATA_WRITEBACK 1
	376	#define GFS2_DATA_ORDERED 2
	377
	378	struct gfs2_args {
37ec89e8 SW	379	char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
	380	char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
	381	char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
	382	unsigned int ar_spectator:1; /* Don't get a journal */
	383	unsigned int ar_ignore_local_fs:1; /* Ignore optimisations */
	384	unsigned int ar_localflocks:1; /* Let the VFS do flock\|fcntl */
	385	unsigned int ar_localcaching:1; /* Local caching */
	386	unsigned int ar_debug:1; /* Oops on errors */
	387	unsigned int ar_upgrade:1; /* Upgrade ondisk format */
	388	unsigned int ar_posix_acl:1; /* Enable posix acls */
	389	unsigned int ar_quota:2; /* off/account/on */
	390	unsigned int ar_suiddir:1; /* suiddir support */
	391	unsigned int ar_data:2; /* ordered/writeback */
	392	unsigned int ar_meta:1; /* mount metafs */
	393	unsigned int ar_num_glockd; /* Number of glockd threads */
b3b94faa DT	394	};
	395
	396	struct gfs2_tune {
	397	spinlock_t gt_spin;
	398
b3b94faa DT	399	unsigned int gt_incore_log_blocks;
b3b94faa DT	400	unsigned int gt_log_flush_secs;
b3b94faa	401
b3b94faa DT	402	unsigned int gt_recoverd_secs;
b3b94faa DT	403	unsigned int gt_logd_secs;
b3b94faa DT	404
	405	unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
	406	unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
	407	unsigned int gt_quota_scale_num; /* Numerator */
	408	unsigned int gt_quota_scale_den; /* Denominator */
	409	unsigned int gt_quota_cache_secs;
	410	unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
b3b94faa	411	unsigned int gt_new_files_jdata;
b3b94faa	412	unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
b3b94faa DT	413	unsigned int gt_stall_secs; /* Detects trouble! */
b3b94faa DT	414	unsigned int gt_complain_secs;
b3b94faa DT	415	unsigned int gt_statfs_quantum;
	416	unsigned int gt_statfs_slow;
	417	};
	418
b3b94faa DT	419	enum {
	420	SDF_JOURNAL_CHECKED = 0,
	421	SDF_JOURNAL_LIVE = 1,
	422	SDF_SHUTDOWN = 2,
254db57f	423	SDF_NOBARRIERS = 3,
b3b94faa DT	424	};
b3b94faa DT	425
b3b94faa DT	426	#define GFS2_FSNAME_LEN 256
b3b94faa DT	427
bb8d8a6f SW	428	struct gfs2_inum_host {
	429	u64 no_formal_ino;
	430	u64 no_addr;
	431	};
	432
	433	struct gfs2_sb_host {
	434	u32 sb_magic;
	435	u32 sb_type;
	436	u32 sb_format;
	437
	438	u32 sb_fs_format;
	439	u32 sb_multihost_format;
	440	u32 sb_bsize;
	441	u32 sb_bsize_shift;
	442
	443	struct gfs2_inum_host sb_master_dir;
	444	struct gfs2_inum_host sb_root_dir;
	445
	446	char sb_lockproto[GFS2_LOCKNAME_LEN];
	447	char sb_locktable[GFS2_LOCKNAME_LEN];
	448	};
	449
b3b94faa DT	450	struct gfs2_sbd {
	451	struct super_block *sd_vfs;
	452	struct kobject sd_kobj;
	453	unsigned long sd_flags; /* SDF_... */
f50dfaf7	454	struct gfs2_sb_host sd_sb;
b3b94faa DT	455
	456	/* Constants computed on mount */
	457
cd915493 SW	458	u32 sd_fsb2bb;
	459	u32 sd_fsb2bb_shift;
	460	u32 sd_diptrs; /* Number of pointers in a dinode */
	461	u32 sd_inptrs; /* Number of pointers in a indirect block */
	462	u32 sd_jbsize; /* Size of a journaled data block */
	463	u32 sd_hash_bsize; /* sizeof(exhash block) */
	464	u32 sd_hash_bsize_shift;
	465	u32 sd_hash_ptrs; /* Number of pointers in a hash block */
	466	u32 sd_qc_per_block;
	467	u32 sd_max_dirres; /* Max blocks needed to add a directory entry */
	468	u32 sd_max_height; /* Max height of a file's metadata tree */
ecc30c79	469	u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
cd915493	470	u32 sd_max_jheight; /* Max height of journaled file's meta tree */
ecc30c79	471	u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1];
b3b94faa DT	472
	473	struct gfs2_args sd_args; /* Mount arguments */
	474	struct gfs2_tune sd_tune; /* Filesystem tuning structure */
	475
	476	/* Lock Stuff */
	477
	478	struct lm_lockstruct sd_lockstruct;
b3b94faa DT	479	struct gfs2_holder sd_live_gh;
	480	struct gfs2_glock *sd_rename_gl;
	481	struct gfs2_glock *sd_trans_gl;
b3b94faa DT	482
	483	/* Inode Stuff */
	484
9b8df98f SW	485	struct dentry *sd_master_dir;
	486	struct dentry *sd_root_dir;
	487
f42faf4f SW	488	struct inode *sd_jindex;
	489	struct inode *sd_inum_inode;
	490	struct inode *sd_statfs_inode;
	491	struct inode *sd_ir_inode;
	492	struct inode *sd_sc_inode;
f42faf4f SW	493	struct inode *sd_qc_inode;
	494	struct inode *sd_rindex;
	495	struct inode *sd_quota_inode;
b3b94faa DT	496
	497	/* Inum stuff */
	498
f55ab26a	499	struct mutex sd_inum_mutex;
b3b94faa DT	500
	501	/* StatFS stuff */
	502
	503	spinlock_t sd_statfs_spin;
bd209cc0 AV	504	struct gfs2_statfs_change_host sd_statfs_master;
bd209cc0 AV	505	struct gfs2_statfs_change_host sd_statfs_local;
b3b94faa DT	506
	507	/* Resource group stuff */
	508
cf45b752	509	int sd_rindex_uptodate;
b3b94faa	510	spinlock_t sd_rindex_spin;
f55ab26a	511	struct mutex sd_rindex_mutex;
b3b94faa DT	512	struct list_head sd_rindex_list;
b3b94faa DT	513	struct list_head sd_rindex_mru_list;
b3b94faa DT	514	struct gfs2_rgrpd *sd_rindex_forward;
	515	unsigned int sd_rgrps;
	516
	517	/* Journal index stuff */
	518
	519	struct list_head sd_jindex_list;
	520	spinlock_t sd_jindex_spin;
f55ab26a	521	struct mutex sd_jindex_mutex;
b3b94faa DT	522	unsigned int sd_journals;
	523	unsigned long sd_jindex_refresh_time;
	524
	525	struct gfs2_jdesc *sd_jdesc;
	526	struct gfs2_holder sd_journal_gh;
	527	struct gfs2_holder sd_jinode_gh;
	528
	529	struct gfs2_holder sd_ir_gh;
	530	struct gfs2_holder sd_sc_gh;
b3b94faa DT	531	struct gfs2_holder sd_qc_gh;
	532
	533	/* Daemon stuff */
	534
b3b94faa DT	535	struct task_struct *sd_recoverd_process;
	536	struct task_struct *sd_logd_process;
	537	struct task_struct *sd_quotad_process;
b3b94faa	538
b3b94faa DT	539	/* Quota stuff */
	540
	541	struct list_head sd_quota_list;
	542	atomic_t sd_quota_count;
	543	spinlock_t sd_quota_spin;
f55ab26a	544	struct mutex sd_quota_mutex;
37b2c837	545	wait_queue_head_t sd_quota_wait;
813e0c46 SW	546	struct list_head sd_trunc_list;
813e0c46 SW	547	spinlock_t sd_trunc_lock;
b3b94faa DT	548
	549	unsigned int sd_quota_slots;
	550	unsigned int sd_quota_chunks;
	551	unsigned char **sd_quota_bitmap;
	552
cd915493	553	u64 sd_quota_sync_gen;
b3b94faa DT	554
	555	/* Log stuff */
	556
	557	spinlock_t sd_log_lock;
b3b94faa DT	558
	559	unsigned int sd_log_blks_reserved;
	560	unsigned int sd_log_commited_buf;
2332c443	561	unsigned int sd_log_commited_databuf;
b3b94faa DT	562	unsigned int sd_log_commited_revoke;
b3b94faa DT	563
b3b94faa DT	564	unsigned int sd_log_num_buf;
	565	unsigned int sd_log_num_revoke;
	566	unsigned int sd_log_num_rg;
	567	unsigned int sd_log_num_databuf;
f42faf4f	568
b3b94faa DT	569	struct list_head sd_log_le_buf;
	570	struct list_head sd_log_le_revoke;
	571	struct list_head sd_log_le_rg;
	572	struct list_head sd_log_le_databuf;
d7b616e2	573	struct list_head sd_log_le_ordered;
b3b94faa	574
fd041f0b	575	atomic_t sd_log_blks_free;
71b86f56	576	struct mutex sd_log_reserve_mutex;
b3b94faa	577
cd915493	578	u64 sd_log_sequence;
b3b94faa DT	579	unsigned int sd_log_head;
b3b94faa DT	580	unsigned int sd_log_tail;
b3b94faa DT	581	int sd_log_idle;
	582
	583	unsigned long sd_log_flush_time;
484adff8	584	struct rw_semaphore sd_log_flush_lock;
16615be1 SW	585	atomic_t sd_log_in_flight;
16615be1 SW	586	wait_queue_head_t sd_log_flush_wait;
b3b94faa DT	587
b3b94faa DT	588	unsigned int sd_log_flush_head;
cd915493	589	u64 sd_log_flush_wrapped;
b3b94faa DT	590
	591	struct list_head sd_ail1_list;
	592	struct list_head sd_ail2_list;
cd915493	593	u64 sd_ail_sync_gen;
b3b94faa DT	594
	595	/* Replay stuff */
	596
	597	struct list_head sd_revoke_list;
	598	unsigned int sd_replay_tail;
	599
	600	unsigned int sd_found_blocks;
	601	unsigned int sd_found_revokes;
	602	unsigned int sd_replayed_blocks;
	603
	604	/* For quiescing the filesystem */
	605
	606	struct gfs2_holder sd_freeze_gh;
f55ab26a	607	struct mutex sd_freeze_lock;
b3b94faa DT	608	unsigned int sd_freeze_count;
b3b94faa DT	609
b3b94faa DT	610	char sd_fsname[GFS2_FSNAME_LEN];
	611	char sd_table_name[GFS2_FSNAME_LEN];
	612	char sd_proto_name[GFS2_FSNAME_LEN];
	613
	614	/* Debugging crud */
	615
	616	unsigned long sd_last_warning;
5f882096 RP	617	struct dentry debugfs_dir; / debugfs directory */
5f882096 RP	618	struct dentry debugfs_dentry_glocks; / for debugfs */
b3b94faa DT	619	};
	620
	621	#endif /* __INCORE_DOT_H__ */
	622