xfs_trans.h

linux 内核源代码

 *    the inode being freed: inode size
 *    the super block free inode counter: sector size
 *    the agi hash list and counters: sector size
 *    the inode btree entry: block size
 *    the on disk inode before ours in the agi hash list: inode cluster size
 *    the inode btree: max depth * blocksize
 *    the allocation btrees: 2 trees * (max depth - 1) * block size
 */
#define	XFS_CALC_IFREE_LOG_RES(mp) \
	((mp)->m_sb.sb_inodesize + \
	 (mp)->m_sb.sb_sectsize + \
	 (mp)->m_sb.sb_sectsize + \
	 XFS_FSB_TO_B((mp), 1) + \
	 MAX((__uint16_t)XFS_FSB_TO_B((mp), 1), XFS_INODE_CLUSTER_SIZE(mp)) + \
	 (128 * 5) + \
	  XFS_ALLOCFREE_LOG_RES(mp, 1) + \
	  (128 * (2 + XFS_IALLOC_BLOCKS(mp) + XFS_IN_MAXLEVELS(mp) + \
	   XFS_ALLOCFREE_LOG_COUNT(mp, 1))))


#define	XFS_IFREE_LOG_RES(mp)	((mp)->m_reservations.tr_ifree)

/*
 * When only changing the inode we log the inode and possibly the superblock
 * We also add a bit of slop for the transaction stuff.
 */
#define	XFS_CALC_ICHANGE_LOG_RES(mp)	((mp)->m_sb.sb_inodesize + \
					 (mp)->m_sb.sb_sectsize + 512)

#define	XFS_ICHANGE_LOG_RES(mp)	((mp)->m_reservations.tr_ichange)

/*
 * Growing the data section of the filesystem.
 *	superblock
 *	agi and agf
 *	allocation btrees
 */
#define	XFS_CALC_GROWDATA_LOG_RES(mp) \
	((mp)->m_sb.sb_sectsize * 3 + \
	 XFS_ALLOCFREE_LOG_RES(mp, 1) + \
	 (128 * (3 + XFS_ALLOCFREE_LOG_COUNT(mp, 1))))

#define	XFS_GROWDATA_LOG_RES(mp)    ((mp)->m_reservations.tr_growdata)

/*
 * Growing the rt section of the filesystem.
 * In the first set of transactions (ALLOC) we allocate space to the
 * bitmap or summary files.
 *	superblock: sector size
 *	agf of the ag from which the extent is allocated: sector size
 *	bmap btree for bitmap/summary inode: max depth * blocksize
 *	bitmap/summary inode: inode size
 *	allocation btrees for 1 block alloc: 2 * (2 * maxdepth - 1) * blocksize
 */
#define	XFS_CALC_GROWRTALLOC_LOG_RES(mp) \
	(2 * (mp)->m_sb.sb_sectsize + \
	 XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK)) + \
	 (mp)->m_sb.sb_inodesize + \
	 XFS_ALLOCFREE_LOG_RES(mp, 1) + \
	 (128 * \
	  (3 + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) + \
	   XFS_ALLOCFREE_LOG_COUNT(mp, 1))))

#define	XFS_GROWRTALLOC_LOG_RES(mp)	((mp)->m_reservations.tr_growrtalloc)

/*
 * Growing the rt section of the filesystem.
 * In the second set of transactions (ZERO) we zero the new metadata blocks.
 *	one bitmap/summary block: blocksize
 */
#define	XFS_CALC_GROWRTZERO_LOG_RES(mp) \
	((mp)->m_sb.sb_blocksize + 128)

#define	XFS_GROWRTZERO_LOG_RES(mp)	((mp)->m_reservations.tr_growrtzero)

/*
 * Growing the rt section of the filesystem.
 * In the third set of transactions (FREE) we update metadata without
 * allocating any new blocks.
 *	superblock: sector size
 *	bitmap inode: inode size
 *	summary inode: inode size
 *	one bitmap block: blocksize
 *	summary blocks: new summary size
 */
#define	XFS_CALC_GROWRTFREE_LOG_RES(mp) \
	((mp)->m_sb.sb_sectsize + \
	 2 * (mp)->m_sb.sb_inodesize + \
	 (mp)->m_sb.sb_blocksize + \
	 (mp)->m_rsumsize + \
	 (128 * 5))

#define	XFS_GROWRTFREE_LOG_RES(mp)	((mp)->m_reservations.tr_growrtfree)

/*
 * Logging the inode modification timestamp on a synchronous write.
 *	inode
 */
#define	XFS_CALC_SWRITE_LOG_RES(mp) \
	((mp)->m_sb.sb_inodesize + 128)

#define	XFS_SWRITE_LOG_RES(mp)	((mp)->m_reservations.tr_swrite)

/*
 * Logging the inode timestamps on an fsync -- same as SWRITE
 * as long as SWRITE logs the entire inode core
 */
#define XFS_FSYNC_TS_LOG_RES(mp)        ((mp)->m_reservations.tr_swrite)

/*
 * Logging the inode mode bits when writing a setuid/setgid file
 *	inode
 */
#define	XFS_CALC_WRITEID_LOG_RES(mp) \
	((mp)->m_sb.sb_inodesize + 128)

#define	XFS_WRITEID_LOG_RES(mp)	((mp)->m_reservations.tr_swrite)

/*
 * Converting the inode from non-attributed to attributed.
 *	the inode being converted: inode size
 *	agf block and superblock (for block allocation)
 *	the new block (directory sized)
 *	bmap blocks for the new directory block
 *	allocation btrees
 */
#define	XFS_CALC_ADDAFORK_LOG_RES(mp)	\
	((mp)->m_sb.sb_inodesize + \
	 (mp)->m_sb.sb_sectsize * 2 + \
	 (mp)->m_dirblksize + \
	 XFS_FSB_TO_B(mp, (XFS_DAENTER_BMAP1B(mp, XFS_DATA_FORK) + 1)) + \
	 XFS_ALLOCFREE_LOG_RES(mp, 1) + \
	 (128 * (4 + (XFS_DAENTER_BMAP1B(mp, XFS_DATA_FORK) + 1) + \
		 XFS_ALLOCFREE_LOG_COUNT(mp, 1))))

#define	XFS_ADDAFORK_LOG_RES(mp)	((mp)->m_reservations.tr_addafork)

/*
 * Removing the attribute fork of a file
 *    the inode being truncated: inode size
 *    the inode\'s bmap btree: max depth * block size
 * And the bmap_finish transaction can free the blocks and bmap blocks:
 *    the agf for each of the ags: 4 * sector size
 *    the agfl for each of the ags: 4 * sector size
 *    the super block to reflect the freed blocks: sector size
 *    worst case split in allocation btrees per extent assuming 4 extents:
 *		4 exts * 2 trees * (2 * max depth - 1) * block size
 */
#define	XFS_CALC_ATTRINVAL_LOG_RES(mp)	\
	(MAX( \
	 ((mp)->m_sb.sb_inodesize + \
	  XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)) + \
	  (128 * (1 + XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)))), \
	 ((4 * (mp)->m_sb.sb_sectsize) + \
	  (4 * (mp)->m_sb.sb_sectsize) + \
	  (mp)->m_sb.sb_sectsize + \
	  XFS_ALLOCFREE_LOG_RES(mp, 4) + \
	  (128 * (9 + XFS_ALLOCFREE_LOG_COUNT(mp, 4))))))

#define	XFS_ATTRINVAL_LOG_RES(mp)	((mp)->m_reservations.tr_attrinval)

/*
 * Setting an attribute.
 *	the inode getting the attribute
 *	the superblock for allocations
 *	the agfs extents are allocated from
 *	the attribute btree * max depth
 *	the inode allocation btree
 * Since attribute transaction space is dependent on the size of the attribute,
 * the calculation is done partially at mount time and partially at runtime.
 */
#define	XFS_CALC_ATTRSET_LOG_RES(mp)	\
	((mp)->m_sb.sb_inodesize + \
	 (mp)->m_sb.sb_sectsize + \
	  XFS_FSB_TO_B((mp), XFS_DA_NODE_MAXDEPTH) + \
	  (128 * (2 + XFS_DA_NODE_MAXDEPTH)))

#define	XFS_ATTRSET_LOG_RES(mp, ext)	\
	((mp)->m_reservations.tr_attrset + \
	 (ext * (mp)->m_sb.sb_sectsize) + \
	 (ext * XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK))) + \
	 (128 * (ext + (ext * XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)))))

/*
 * Removing an attribute.
 *    the inode: inode size
 *    the attribute btree could join: max depth * block size
 *    the inode bmap btree could join or split: max depth * block size
 * And the bmap_finish transaction can free the attr blocks freed giving:
 *    the agf for the ag in which the blocks live: 2 * sector size
 *    the agfl for the ag in which the blocks live: 2 * sector size
 *    the superblock for the free block count: sector size
 *    the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
 */
#define	XFS_CALC_ATTRRM_LOG_RES(mp)	\
	(MAX( \
	  ((mp)->m_sb.sb_inodesize + \
	  XFS_FSB_TO_B((mp), XFS_DA_NODE_MAXDEPTH) + \
	  XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)) + \
	  (128 * (1 + XFS_DA_NODE_MAXDEPTH + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK)))), \
	 ((2 * (mp)->m_sb.sb_sectsize) + \
	  (2 * (mp)->m_sb.sb_sectsize) + \
	  (mp)->m_sb.sb_sectsize + \
	  XFS_ALLOCFREE_LOG_RES(mp, 2) + \
	  (128 * (5 + XFS_ALLOCFREE_LOG_COUNT(mp, 2))))))

#define	XFS_ATTRRM_LOG_RES(mp)	((mp)->m_reservations.tr_attrrm)

/*
 * Clearing a bad agino number in an agi hash bucket.
 */
#define	XFS_CALC_CLEAR_AGI_BUCKET_LOG_RES(mp) \
	((mp)->m_sb.sb_sectsize + 128)

#define	XFS_CLEAR_AGI_BUCKET_LOG_RES(mp)  ((mp)->m_reservations.tr_clearagi)


/*
 * Various log count values.
 */
#define	XFS_DEFAULT_LOG_COUNT		1
#define	XFS_DEFAULT_PERM_LOG_COUNT	2
#define	XFS_ITRUNCATE_LOG_COUNT		2
#define XFS_INACTIVE_LOG_COUNT		2
#define	XFS_CREATE_LOG_COUNT		2
#define	XFS_MKDIR_LOG_COUNT		3
#define	XFS_SYMLINK_LOG_COUNT		3
#define	XFS_REMOVE_LOG_COUNT		2
#define	XFS_LINK_LOG_COUNT		2
#define	XFS_RENAME_LOG_COUNT		2
#define	XFS_WRITE_LOG_COUNT		2
#define	XFS_ADDAFORK_LOG_COUNT		2
#define	XFS_ATTRINVAL_LOG_COUNT		1
#define	XFS_ATTRSET_LOG_COUNT		3
#define	XFS_ATTRRM_LOG_COUNT		3

/*
 * 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_ATTR_BTREE_REF	1
#define	XFS_INO_REF		1
#define	XFS_DQUOT_REF		1

#ifdef __KERNEL__
/*
 * XFS transaction mechanism exported interfaces that are
 * actually macros.
 */
#define	xfs_trans_get_log_res(tp)	((tp)->t_log_res)
#define	xfs_trans_get_log_count(tp)	((tp)->t_log_count)
#define	xfs_trans_get_block_res(tp)	((tp)->t_blk_res)
#define	xfs_trans_set_sync(tp)		((tp)->t_flags |= XFS_TRANS_SYNC)

#ifdef DEBUG
#define	xfs_trans_agblocks_delta(tp, d)	((tp)->t_ag_freeblks_delta += (int64_t)d)
#define	xfs_trans_agflist_delta(tp, d)	((tp)->t_ag_flist_delta += (int64_t)d)
#define	xfs_trans_agbtree_delta(tp, d)	((tp)->t_ag_btree_delta += (int64_t)d)
#else
#define	xfs_trans_agblocks_delta(tp, d)
#define	xfs_trans_agflist_delta(tp, d)
#define	xfs_trans_agbtree_delta(tp, d)
#endif

/*
 * XFS transaction mechanism exported interfaces.
 */
void		xfs_trans_init(struct xfs_mount *);
xfs_trans_t	*xfs_trans_alloc(struct xfs_mount *, uint);
xfs_trans_t	*_xfs_trans_alloc(struct xfs_mount *, uint);
xfs_trans_t	*xfs_trans_dup(xfs_trans_t *);
int		xfs_trans_reserve(xfs_trans_t *, uint, uint, uint,
				  uint, uint);
void		xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t);
struct xfs_buf	*xfs_trans_get_buf(xfs_trans_t *, struct xfs_buftarg *, xfs_daddr_t,
				   int, uint);
int		xfs_trans_read_buf(struct xfs_mount *, xfs_trans_t *,
				   struct xfs_buftarg *, xfs_daddr_t, int, uint,
				   struct xfs_buf **);
struct xfs_buf	*xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *, int);

void		xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *);
void		xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *);
void		xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *);
void		xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *);
void		xfs_trans_binval(xfs_trans_t *, struct xfs_buf *);
void		xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);
void		xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *);
void		xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint);
void		xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *);
int		xfs_trans_iget(struct xfs_mount *, xfs_trans_t *,
			       xfs_ino_t , uint, uint, struct xfs_inode **);
void		xfs_trans_ijoin(xfs_trans_t *, struct xfs_inode *, uint);
void		xfs_trans_ihold(xfs_trans_t *, struct xfs_inode *);
void		xfs_trans_log_buf(xfs_trans_t *, struct xfs_buf *, uint, uint);
void		xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);
struct xfs_efi_log_item	*xfs_trans_get_efi(xfs_trans_t *, uint);
void		xfs_efi_release(struct xfs_efi_log_item *, uint);
void		xfs_trans_log_efi_extent(xfs_trans_t *,
					 struct xfs_efi_log_item *,
					 xfs_fsblock_t,
					 xfs_extlen_t);
struct xfs_efd_log_item	*xfs_trans_get_efd(xfs_trans_t *,
				  struct xfs_efi_log_item *,
				  uint);
void		xfs_trans_log_efd_extent(xfs_trans_t *,
					 struct xfs_efd_log_item *,
					 xfs_fsblock_t,
					 xfs_extlen_t);
int		_xfs_trans_commit(xfs_trans_t *,
				  uint flags,
				  int *);
#define xfs_trans_commit(tp, flags)	_xfs_trans_commit(tp, flags, NULL)
void		xfs_trans_cancel(xfs_trans_t *, int);
void		xfs_trans_ail_init(struct xfs_mount *);
xfs_lsn_t	xfs_trans_push_ail(struct xfs_mount *, xfs_lsn_t);
xfs_lsn_t	xfs_trans_tail_ail(struct xfs_mount *);
void		xfs_trans_unlocked_item(struct xfs_mount *,
					xfs_log_item_t *);
xfs_log_busy_slot_t *xfs_trans_add_busy(xfs_trans_t *tp,
					xfs_agnumber_t ag,
					xfs_extlen_t idx);

#endif	/* __KERNEL__ */

#endif	/* __XFS_TRANS_H__ */