[mirror_ubuntu-artful-kernel.git] / fs / xfs / libxfs / xfs_shared.h

/*
 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
 * Copyright (c) 2013 Red Hat, Inc.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#ifndef __XFS_SHARED_H__
#define __XFS_SHARED_H__

/*
 * Definitions shared between kernel and userspace that don't fit into any other
 * header file that is shared with userspace.
 */
struct xfs_ifork;
struct xfs_buf;
struct xfs_buf_ops;
struct xfs_mount;
struct xfs_trans;
struct xfs_inode;

/*
 * Buffer verifier operations are widely used, including userspace tools
 */
extern const struct xfs_buf_ops xfs_agf_buf_ops;
extern const struct xfs_buf_ops xfs_agi_buf_ops;
extern const struct xfs_buf_ops xfs_agf_buf_ops;
extern const struct xfs_buf_ops xfs_agfl_buf_ops;
extern const struct xfs_buf_ops xfs_allocbt_buf_ops;
extern const struct xfs_buf_ops xfs_attr3_leaf_buf_ops;
extern const struct xfs_buf_ops xfs_attr3_rmt_buf_ops;
extern const struct xfs_buf_ops xfs_bmbt_buf_ops;
extern const struct xfs_buf_ops xfs_da3_node_buf_ops;
extern const struct xfs_buf_ops xfs_dquot_buf_ops;
extern const struct xfs_buf_ops xfs_symlink_buf_ops;
extern const struct xfs_buf_ops xfs_agi_buf_ops;
extern const struct xfs_buf_ops xfs_inobt_buf_ops;
extern const struct xfs_buf_ops xfs_inode_buf_ops;
extern const struct xfs_buf_ops xfs_inode_buf_ra_ops;
extern const struct xfs_buf_ops xfs_dquot_buf_ops;
extern const struct xfs_buf_ops xfs_sb_buf_ops;
extern const struct xfs_buf_ops xfs_sb_quiet_buf_ops;
extern const struct xfs_buf_ops xfs_symlink_buf_ops;

/*
 * Transaction types.  Used to distinguish types of buffers. These never reach
 * the log.
 */
#define XFS_TRANS_SETATTR_NOT_SIZE	1
#define XFS_TRANS_SETATTR_SIZE		2
#define XFS_TRANS_INACTIVE		3
#define XFS_TRANS_CREATE		4
#define XFS_TRANS_CREATE_TRUNC		5
#define XFS_TRANS_TRUNCATE_FILE		6
#define XFS_TRANS_REMOVE		7
#define XFS_TRANS_LINK			8
#define XFS_TRANS_RENAME		9
#define XFS_TRANS_MKDIR			10
#define XFS_TRANS_RMDIR			11
#define XFS_TRANS_SYMLINK		12
#define XFS_TRANS_SET_DMATTRS		13
#define XFS_TRANS_GROWFS		14
#define XFS_TRANS_STRAT_WRITE		15
#define XFS_TRANS_DIOSTRAT		16
/* 17 was XFS_TRANS_WRITE_SYNC */
#define	XFS_TRANS_WRITEID		18
#define	XFS_TRANS_ADDAFORK		19
#define	XFS_TRANS_ATTRINVAL		20
#define	XFS_TRANS_ATRUNCATE		21
#define	XFS_TRANS_ATTR_SET		22
#define	XFS_TRANS_ATTR_RM		23
#define	XFS_TRANS_ATTR_FLAG		24
#define	XFS_TRANS_CLEAR_AGI_BUCKET	25
#define XFS_TRANS_SB_CHANGE		26
/*
 * Dummy entries since we use the transaction type to index into the
 * trans_type[] in xlog_recover_print_trans_head()
 */
#define XFS_TRANS_DUMMY1		27
#define XFS_TRANS_DUMMY2		28
#define XFS_TRANS_QM_QUOTAOFF		29
#define XFS_TRANS_QM_DQALLOC		30
#define XFS_TRANS_QM_SETQLIM		31
#define XFS_TRANS_QM_DQCLUSTER		32
#define XFS_TRANS_QM_QINOCREATE		33
#define XFS_TRANS_QM_QUOTAOFF_END	34
#define XFS_TRANS_FSYNC_TS		35
#define	XFS_TRANS_GROWFSRT_ALLOC	36
#define	XFS_TRANS_GROWFSRT_ZERO		37
#define	XFS_TRANS_GROWFSRT_FREE		38
#define	XFS_TRANS_SWAPEXT		39
#define	XFS_TRANS_CHECKPOINT		40
#define	XFS_TRANS_ICREATE		41
#define	XFS_TRANS_CREATE_TMPFILE	42
#define	XFS_TRANS_TYPE_MAX		43
/* new transaction types need to be reflected in xfs_logprint(8) */

#define XFS_TRANS_TYPES \
	{ XFS_TRANS_SETATTR_NOT_SIZE,	"SETATTR_NOT_SIZE" }, \
	{ XFS_TRANS_SETATTR_SIZE,	"SETATTR_SIZE" }, \
	{ XFS_TRANS_INACTIVE,		"INACTIVE" }, \
	{ XFS_TRANS_CREATE,		"CREATE" }, \
	{ XFS_TRANS_CREATE_TRUNC,	"CREATE_TRUNC" }, \
	{ XFS_TRANS_TRUNCATE_FILE,	"TRUNCATE_FILE" }, \
	{ XFS_TRANS_REMOVE,		"REMOVE" }, \
	{ XFS_TRANS_LINK,		"LINK" }, \
	{ XFS_TRANS_RENAME,		"RENAME" }, \
	{ XFS_TRANS_MKDIR,		"MKDIR" }, \
	{ XFS_TRANS_RMDIR,		"RMDIR" }, \
	{ XFS_TRANS_SYMLINK,		"SYMLINK" }, \
	{ XFS_TRANS_SET_DMATTRS,	"SET_DMATTRS" }, \
	{ XFS_TRANS_GROWFS,		"GROWFS" }, \
	{ XFS_TRANS_STRAT_WRITE,	"STRAT_WRITE" }, \
	{ XFS_TRANS_DIOSTRAT,		"DIOSTRAT" }, \
	{ XFS_TRANS_WRITEID,		"WRITEID" }, \
	{ XFS_TRANS_ADDAFORK,		"ADDAFORK" }, \
	{ XFS_TRANS_ATTRINVAL,		"ATTRINVAL" }, \
	{ XFS_TRANS_ATRUNCATE,		"ATRUNCATE" }, \
	{ XFS_TRANS_ATTR_SET,		"ATTR_SET" }, \
	{ XFS_TRANS_ATTR_RM,		"ATTR_RM" }, \
	{ XFS_TRANS_ATTR_FLAG,		"ATTR_FLAG" }, \
	{ XFS_TRANS_CLEAR_AGI_BUCKET,	"CLEAR_AGI_BUCKET" }, \
	{ XFS_TRANS_SB_CHANGE,		"SBCHANGE" }, \
	{ XFS_TRANS_DUMMY1,		"DUMMY1" }, \
	{ XFS_TRANS_DUMMY2,		"DUMMY2" }, \
	{ XFS_TRANS_QM_QUOTAOFF,	"QM_QUOTAOFF" }, \
	{ XFS_TRANS_QM_DQALLOC,		"QM_DQALLOC" }, \
	{ XFS_TRANS_QM_SETQLIM,		"QM_SETQLIM" }, \
	{ XFS_TRANS_QM_DQCLUSTER,	"QM_DQCLUSTER" }, \
	{ XFS_TRANS_QM_QINOCREATE,	"QM_QINOCREATE" }, \
	{ XFS_TRANS_QM_QUOTAOFF_END,	"QM_QOFF_END" }, \
	{ XFS_TRANS_FSYNC_TS,		"FSYNC_TS" }, \
	{ XFS_TRANS_GROWFSRT_ALLOC,	"GROWFSRT_ALLOC" }, \
	{ XFS_TRANS_GROWFSRT_ZERO,	"GROWFSRT_ZERO" }, \
	{ XFS_TRANS_GROWFSRT_FREE,	"GROWFSRT_FREE" }, \
	{ XFS_TRANS_SWAPEXT,		"SWAPEXT" }, \
	{ XFS_TRANS_CHECKPOINT,		"CHECKPOINT" }, \
	{ XFS_TRANS_ICREATE,		"ICREATE" }, \
	{ XFS_TRANS_CREATE_TMPFILE,	"CREATE_TMPFILE" }, \
	{ XLOG_UNMOUNT_REC_TYPE,	"UNMOUNT" }

/*
 * This structure is used to track log items associated with
 * a transaction.  It points to the log item and keeps some
 * flags to track the state of the log item.  It also tracks
 * the amount of space needed to log the item it describes
 * once we get to commit processing (see xfs_trans_commit()).
 */
struct xfs_log_item_desc {
	struct xfs_log_item	*lid_item;
	struct list_head	lid_trans;
	unsigned char		lid_flags;
};

#define XFS_LID_DIRTY		0x1

/* log size calculation functions */
int	xfs_log_calc_unit_res(struct xfs_mount *mp, int unit_bytes);
int	xfs_log_calc_minimum_size(struct xfs_mount *);


/*
 * Values for t_flags.
 */
#define	XFS_TRANS_DIRTY		0x01	/* something needs to be logged */
#define	XFS_TRANS_SB_DIRTY	0x02	/* superblock is modified */
#define	XFS_TRANS_PERM_LOG_RES	0x04	/* xact took a permanent log res */
#define	XFS_TRANS_SYNC		0x08	/* make commit synchronous */
#define XFS_TRANS_DQ_DIRTY	0x10	/* at least one dquot in trx dirty */
#define XFS_TRANS_RESERVE	0x20    /* OK to use reserved data blocks */
#define XFS_TRANS_FREEZE_PROT	0x40	/* Transaction has elevated writer
					   count in superblock */
/*
 * Field values for xfs_trans_mod_sb.
 */
#define	XFS_TRANS_SB_ICOUNT		0x00000001
#define	XFS_TRANS_SB_IFREE		0x00000002
#define	XFS_TRANS_SB_FDBLOCKS		0x00000004
#define	XFS_TRANS_SB_RES_FDBLOCKS	0x00000008
#define	XFS_TRANS_SB_FREXTENTS		0x00000010
#define	XFS_TRANS_SB_RES_FREXTENTS	0x00000020
#define	XFS_TRANS_SB_DBLOCKS		0x00000040
#define	XFS_TRANS_SB_AGCOUNT		0x00000080
#define	XFS_TRANS_SB_IMAXPCT		0x00000100
#define	XFS_TRANS_SB_REXTSIZE		0x00000200
#define	XFS_TRANS_SB_RBMBLOCKS		0x00000400
#define	XFS_TRANS_SB_RBLOCKS		0x00000800
#define	XFS_TRANS_SB_REXTENTS		0x00001000
#define	XFS_TRANS_SB_REXTSLOG		0x00002000

/*
 * Here we centralize the specification of XFS meta-data buffer reference count
 * values.  This determines how hard the buffer cache tries to hold onto the
 * buffer.
 */
#define	XFS_AGF_REF		4
#define	XFS_AGI_REF		4
#define	XFS_AGFL_REF		3
#define	XFS_INO_BTREE_REF	3
#define	XFS_ALLOC_BTREE_REF	2
#define	XFS_BMAP_BTREE_REF	2
#define	XFS_DIR_BTREE_REF	2
#define	XFS_INO_REF		2
#define	XFS_ATTR_BTREE_REF	1
#define	XFS_DQUOT_REF		1

/*
 * Flags for xfs_trans_ichgtime().
 */
#define	XFS_ICHGTIME_MOD	0x1	/* data fork modification timestamp */
#define	XFS_ICHGTIME_CHG	0x2	/* inode field change timestamp */
#define	XFS_ICHGTIME_CREATE	0x4	/* inode create timestamp */


/*
 * Symlink decoding/encoding functions
 */
int xfs_symlink_blocks(struct xfs_mount *mp, int pathlen);
int xfs_symlink_hdr_set(struct xfs_mount *mp, xfs_ino_t ino, uint32_t offset,
			uint32_t size, struct xfs_buf *bp);
bool xfs_symlink_hdr_ok(xfs_ino_t ino, uint32_t offset,
			uint32_t size, struct xfs_buf *bp);
void xfs_symlink_local_to_remote(struct xfs_trans *tp, struct xfs_buf *bp,
				 struct xfs_inode *ip, struct xfs_ifork *ifp);

#endif /* __XFS_SHARED_H__ */
Commit	Line	Data
70a9883c DC	1	/*
	2	* Copyright (c) 2000-2005 Silicon Graphics, Inc.
	3	* Copyright (c) 2013 Red Hat, Inc.
	4	* All Rights Reserved.
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License as
	8	* published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it would be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program; if not, write the Free Software Foundation,
	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	18	*/
	19	#ifndef __XFS_SHARED_H__
	20	#define __XFS_SHARED_H__
	21
	22	/*
	23	* Definitions shared between kernel and userspace that don't fit into any other
	24	* header file that is shared with userspace.
	25	*/
	26	struct xfs_ifork;
	27	struct xfs_buf;
	28	struct xfs_buf_ops;
	29	struct xfs_mount;
	30	struct xfs_trans;
	31	struct xfs_inode;
	32
	33	/*
	34	* Buffer verifier operations are widely used, including userspace tools
	35	*/
	36	extern const struct xfs_buf_ops xfs_agf_buf_ops;
	37	extern const struct xfs_buf_ops xfs_agi_buf_ops;
	38	extern const struct xfs_buf_ops xfs_agf_buf_ops;
	39	extern const struct xfs_buf_ops xfs_agfl_buf_ops;
	40	extern const struct xfs_buf_ops xfs_allocbt_buf_ops;
	41	extern const struct xfs_buf_ops xfs_attr3_leaf_buf_ops;
	42	extern const struct xfs_buf_ops xfs_attr3_rmt_buf_ops;
	43	extern const struct xfs_buf_ops xfs_bmbt_buf_ops;
	44	extern const struct xfs_buf_ops xfs_da3_node_buf_ops;
	45	extern const struct xfs_buf_ops xfs_dquot_buf_ops;
	46	extern const struct xfs_buf_ops xfs_symlink_buf_ops;
	47	extern const struct xfs_buf_ops xfs_agi_buf_ops;
	48	extern const struct xfs_buf_ops xfs_inobt_buf_ops;
	49	extern const struct xfs_buf_ops xfs_inode_buf_ops;
	50	extern const struct xfs_buf_ops xfs_inode_buf_ra_ops;
	51	extern const struct xfs_buf_ops xfs_dquot_buf_ops;
	52	extern const struct xfs_buf_ops xfs_sb_buf_ops;
	53	extern const struct xfs_buf_ops xfs_sb_quiet_buf_ops;
	54	extern const struct xfs_buf_ops xfs_symlink_buf_ops;
	55
	56	/*
	57	* Transaction types. Used to distinguish types of buffers. These never reach
	58	* the log.
	59	*/
	60	#define XFS_TRANS_SETATTR_NOT_SIZE 1
	61	#define XFS_TRANS_SETATTR_SIZE 2
	62	#define XFS_TRANS_INACTIVE 3
	63	#define XFS_TRANS_CREATE 4
	64	#define XFS_TRANS_CREATE_TRUNC 5
65	#define XFS_TRANS_TRUNCATE_FILE 6
66	#define XFS_TRANS_REMOVE 7
67	#define XFS_TRANS_LINK 8
68	#define XFS_TRANS_RENAME 9
69	#define XFS_TRANS_MKDIR 10
70	#define XFS_TRANS_RMDIR 11
71	#define XFS_TRANS_SYMLINK 12
72	#define XFS_TRANS_SET_DMATTRS 13
73	#define XFS_TRANS_GROWFS 14
74	#define XFS_TRANS_STRAT_WRITE 15
75	#define XFS_TRANS_DIOSTRAT 16
76	/* 17 was XFS_TRANS_WRITE_SYNC */
77	#define XFS_TRANS_WRITEID 18
78	#define XFS_TRANS_ADDAFORK 19
79	#define XFS_TRANS_ATTRINVAL 20
80	#define XFS_TRANS_ATRUNCATE 21
81	#define XFS_TRANS_ATTR_SET 22
82	#define XFS_TRANS_ATTR_RM 23
83	#define XFS_TRANS_ATTR_FLAG 24
84	#define XFS_TRANS_CLEAR_AGI_BUCKET 25
61e63ecb	85	#define XFS_TRANS_SB_CHANGE 26
70a9883c DC	86	/*
	87	* Dummy entries since we use the transaction type to index into the
	88	* trans_type[] in xlog_recover_print_trans_head()
	89	*/
	90	#define XFS_TRANS_DUMMY1 27
	91	#define XFS_TRANS_DUMMY2 28
	92	#define XFS_TRANS_QM_QUOTAOFF 29
	93	#define XFS_TRANS_QM_DQALLOC 30
	94	#define XFS_TRANS_QM_SETQLIM 31
	95	#define XFS_TRANS_QM_DQCLUSTER 32
	96	#define XFS_TRANS_QM_QINOCREATE 33
	97	#define XFS_TRANS_QM_QUOTAOFF_END 34
61e63ecb DC	98	#define XFS_TRANS_FSYNC_TS 35
	99	#define XFS_TRANS_GROWFSRT_ALLOC 36
	100	#define XFS_TRANS_GROWFSRT_ZERO 37
	101	#define XFS_TRANS_GROWFSRT_FREE 38
	102	#define XFS_TRANS_SWAPEXT 39
	103	#define XFS_TRANS_CHECKPOINT 40
	104	#define XFS_TRANS_ICREATE 41
	105	#define XFS_TRANS_CREATE_TMPFILE 42
	106	#define XFS_TRANS_TYPE_MAX 43
70a9883c DC	107	/* new transaction types need to be reflected in xfs_logprint(8) */
	108
	109	#define XFS_TRANS_TYPES \
	110	{ XFS_TRANS_SETATTR_NOT_SIZE, "SETATTR_NOT_SIZE" }, \
	111	{ XFS_TRANS_SETATTR_SIZE, "SETATTR_SIZE" }, \
	112	{ XFS_TRANS_INACTIVE, "INACTIVE" }, \
	113	{ XFS_TRANS_CREATE, "CREATE" }, \
	114	{ XFS_TRANS_CREATE_TRUNC, "CREATE_TRUNC" }, \
	115	{ XFS_TRANS_TRUNCATE_FILE, "TRUNCATE_FILE" }, \
	116	{ XFS_TRANS_REMOVE, "REMOVE" }, \
	117	{ XFS_TRANS_LINK, "LINK" }, \
	118	{ XFS_TRANS_RENAME, "RENAME" }, \
	119	{ XFS_TRANS_MKDIR, "MKDIR" }, \
	120	{ XFS_TRANS_RMDIR, "RMDIR" }, \
	121	{ XFS_TRANS_SYMLINK, "SYMLINK" }, \
	122	{ XFS_TRANS_SET_DMATTRS, "SET_DMATTRS" }, \
	123	{ XFS_TRANS_GROWFS, "GROWFS" }, \
	124	{ XFS_TRANS_STRAT_WRITE, "STRAT_WRITE" }, \
	125	{ XFS_TRANS_DIOSTRAT, "DIOSTRAT" }, \
	126	{ XFS_TRANS_WRITEID, "WRITEID" }, \
	127	{ XFS_TRANS_ADDAFORK, "ADDAFORK" }, \
	128	{ XFS_TRANS_ATTRINVAL, "ATTRINVAL" }, \
	129	{ XFS_TRANS_ATRUNCATE, "ATRUNCATE" }, \
	130	{ XFS_TRANS_ATTR_SET, "ATTR_SET" }, \
	131	{ XFS_TRANS_ATTR_RM, "ATTR_RM" }, \
	132	{ XFS_TRANS_ATTR_FLAG, "ATTR_FLAG" }, \
	133	{ XFS_TRANS_CLEAR_AGI_BUCKET, "CLEAR_AGI_BUCKET" }, \
61e63ecb DC	134	{ XFS_TRANS_SB_CHANGE, "SBCHANGE" }, \
	135	{ XFS_TRANS_DUMMY1, "DUMMY1" }, \
	136	{ XFS_TRANS_DUMMY2, "DUMMY2" }, \
70a9883c DC	137	{ XFS_TRANS_QM_QUOTAOFF, "QM_QUOTAOFF" }, \
	138	{ XFS_TRANS_QM_DQALLOC, "QM_DQALLOC" }, \
	139	{ XFS_TRANS_QM_SETQLIM, "QM_SETQLIM" }, \
	140	{ XFS_TRANS_QM_DQCLUSTER, "QM_DQCLUSTER" }, \
	141	{ XFS_TRANS_QM_QINOCREATE, "QM_QINOCREATE" }, \
	142	{ XFS_TRANS_QM_QUOTAOFF_END, "QM_QOFF_END" }, \
70a9883c DC	143	{ XFS_TRANS_FSYNC_TS, "FSYNC_TS" }, \
	144	{ XFS_TRANS_GROWFSRT_ALLOC, "GROWFSRT_ALLOC" }, \
	145	{ XFS_TRANS_GROWFSRT_ZERO, "GROWFSRT_ZERO" }, \
	146	{ XFS_TRANS_GROWFSRT_FREE, "GROWFSRT_FREE" }, \
	147	{ XFS_TRANS_SWAPEXT, "SWAPEXT" }, \
70a9883c	148	{ XFS_TRANS_CHECKPOINT, "CHECKPOINT" }, \
61e63ecb DC	149	{ XFS_TRANS_ICREATE, "ICREATE" }, \
61e63ecb DC	150	{ XFS_TRANS_CREATE_TMPFILE, "CREATE_TMPFILE" }, \
70a9883c DC	151	{ XLOG_UNMOUNT_REC_TYPE, "UNMOUNT" }
	152
	153	/*
	154	* This structure is used to track log items associated with
	155	* a transaction. It points to the log item and keeps some
	156	* flags to track the state of the log item. It also tracks
	157	* the amount of space needed to log the item it describes
	158	* once we get to commit processing (see xfs_trans_commit()).
	159	*/
	160	struct xfs_log_item_desc {
	161	struct xfs_log_item *lid_item;
	162	struct list_head lid_trans;
	163	unsigned char lid_flags;
	164	};
	165
	166	#define XFS_LID_DIRTY 0x1
	167
	168	/* log size calculation functions */
	169	int xfs_log_calc_unit_res(struct xfs_mount *mp, int unit_bytes);
	170	int xfs_log_calc_minimum_size(struct xfs_mount *);
	171
	172
	173	/*
	174	* Values for t_flags.
	175	*/
	176	#define XFS_TRANS_DIRTY 0x01 /* something needs to be logged */
	177	#define XFS_TRANS_SB_DIRTY 0x02 /* superblock is modified */
	178	#define XFS_TRANS_PERM_LOG_RES 0x04 /* xact took a permanent log res */
	179	#define XFS_TRANS_SYNC 0x08 /* make commit synchronous */
	180	#define XFS_TRANS_DQ_DIRTY 0x10 /* at least one dquot in trx dirty */
	181	#define XFS_TRANS_RESERVE 0x20 /* OK to use reserved data blocks */
	182	#define XFS_TRANS_FREEZE_PROT 0x40 /* Transaction has elevated writer
	183	count in superblock */
70a9883c DC	184	/*
	185	* Field values for xfs_trans_mod_sb.
	186	*/
	187	#define XFS_TRANS_SB_ICOUNT 0x00000001
	188	#define XFS_TRANS_SB_IFREE 0x00000002
	189	#define XFS_TRANS_SB_FDBLOCKS 0x00000004
	190	#define XFS_TRANS_SB_RES_FDBLOCKS 0x00000008
	191	#define XFS_TRANS_SB_FREXTENTS 0x00000010
	192	#define XFS_TRANS_SB_RES_FREXTENTS 0x00000020
	193	#define XFS_TRANS_SB_DBLOCKS 0x00000040
	194	#define XFS_TRANS_SB_AGCOUNT 0x00000080
	195	#define XFS_TRANS_SB_IMAXPCT 0x00000100
	196	#define XFS_TRANS_SB_REXTSIZE 0x00000200
	197	#define XFS_TRANS_SB_RBMBLOCKS 0x00000400
	198	#define XFS_TRANS_SB_RBLOCKS 0x00000800
	199	#define XFS_TRANS_SB_REXTENTS 0x00001000
	200	#define XFS_TRANS_SB_REXTSLOG 0x00002000
	201
	202	/*
	203	* Here we centralize the specification of XFS meta-data buffer reference count
	204	* values. This determines how hard the buffer cache tries to hold onto the
	205	* buffer.
	206	*/
	207	#define XFS_AGF_REF 4
	208	#define XFS_AGI_REF 4
	209	#define XFS_AGFL_REF 3
	210	#define XFS_INO_BTREE_REF 3
	211	#define XFS_ALLOC_BTREE_REF 2
	212	#define XFS_BMAP_BTREE_REF 2
	213	#define XFS_DIR_BTREE_REF 2
	214	#define XFS_INO_REF 2
	215	#define XFS_ATTR_BTREE_REF 1
	216	#define XFS_DQUOT_REF 1
	217
	218	/*
	219	* Flags for xfs_trans_ichgtime().
	220	*/
	221	#define XFS_ICHGTIME_MOD 0x1 /* data fork modification timestamp */
	222	#define XFS_ICHGTIME_CHG 0x2 /* inode field change timestamp */
	223	#define XFS_ICHGTIME_CREATE 0x4 /* inode create timestamp */
	224
	225
	226	/*
	227	* Symlink decoding/encoding functions
	228	*/
	229	int xfs_symlink_blocks(struct xfs_mount *mp, int pathlen);
	230	int xfs_symlink_hdr_set(struct xfs_mount *mp, xfs_ino_t ino, uint32_t offset,
	231	uint32_t size, struct xfs_buf *bp);
bda65ef8	232	bool xfs_symlink_hdr_ok(xfs_ino_t ino, uint32_t offset,
70a9883c DC	233	uint32_t size, struct xfs_buf *bp);
	234	void xfs_symlink_local_to_remote(struct xfs_trans tp, struct xfs_buf bp,
	235	struct xfs_inode ip, struct xfs_ifork ifp);
	236
	237	#endif /* __XFS_SHARED_H__ */