[PATCH 22/49] xfs: split out on-disk transaction definitions

[Mark Tinguely]

On 07/19/13 01:44, Dave Chinner wrote:
> From: Dave Chinner<dchinner at redhat.com>
>
> There's a bunch of definitions in xfs_trans.h that define on-disk
> formats - transaction headers taht get written into the log, log
> item type definitions, etc. Split out everything into a separate
> file so that all which remains in xfs_trans.h are kernel only
> definitions.
>
> Signed-off-by: Dave Chinner<dchinner at redhat.com>
> ---

There are a couple comments that now wrap because of new indentation, 
but they are fixed in a later patch.

The following entries deviates from kernel patch 07/49 in they are not 
moved from xfs_trans.h - never are:


/*
  * 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

/*
  * 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 */

/*
  * Values for call flags parameter.
  */
#define	XFS_TRANS_RELEASE_LOG_RES	0x4
#define	XFS_TRANS_ABORT			0x8

/*
  * 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 determine 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 */