xfs: cleanup log reservation calculactions (025101dc) · Commits · 戴 / test

fs/xfs/xfs_trans.c

+400 −46

Original line number	Diff line number	Diff line
		@@ -48,134 +48,489 @@

		kmem_zone_t *xfs_trans_zone;


		/*
		* Various log reservation values.
		*
		* These are based on the size of the file system block because that is what
		* most transactions manipulate. Each adds in an additional 128 bytes per
		* item logged to try to account for the overhead of the transaction mechanism.
		*
		* Note: Most of the reservations underestimate the number of allocation
		* groups into which they could free extents in the xfs_bmap_finish() call.
		* This is because the number in the worst case is quite high and quite
		* unusual. In order to fix this we need to change xfs_bmap_finish() to free
		* extents in only a single AG at a time. This will require changes to the
		* EFI code as well, however, so that the EFI for the extents not freed is
		* logged again in each transaction. See SGI PV #261917.
		*
		* Reservation functions here avoid a huge stack in xfs_trans_init due to
		* register overflow from temporaries in the calculations.
		*/


		/*
		* Reservation functions here avoid a huge stack in xfs_trans_init
		* due to register overflow from temporaries in the calculations.
		* In a write transaction we can allocate a maximum of 2
		* extents. This gives:
		* the inode getting the new extents: inode size
		* the inode's bmap btree: max depth * block size
		* the agfs of the ags from which the extents are allocated: 2 * sector
		* the superblock free block counter: sector size
		* the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
		* And the bmap_finish transaction can free bmap blocks in a join:
		* the agfs of the ags containing the blocks: 2 * sector size
		* the agfls of the ags containing the blocks: 2 * sector size
		* the super block free block counter: sector size
		* the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
		*/
		STATIC uint
		xfs_calc_write_reservation(xfs_mount_t *mp)
		xfs_calc_write_reservation(
		struct xfs_mount *mp)
		{
		return XFS_CALC_WRITE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp);
		}

		return XFS_DQUOT_LOGRES(mp) +
		MAX((mp->m_sb.sb_inodesize +
		XFS_FSB_TO_B(mp, XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK)) +
		2 * mp->m_sb.sb_sectsize +
		mp->m_sb.sb_sectsize +
		XFS_ALLOCFREE_LOG_RES(mp, 2) +
		128 * (4 + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) +
		XFS_ALLOCFREE_LOG_COUNT(mp, 2))),
		(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))));
		}

		/*
		* In truncating a file we free up to two extents at once. We can modify:
		* the inode being truncated: inode size
		* the inode's bmap btree: (max depth + 1) * 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
		* the inode btree: max depth * blocksize
		* the allocation btrees: 2 trees * (max depth - 1) * block size
		*/
		STATIC uint
		xfs_calc_itruncate_reservation(xfs_mount_t *mp)
		xfs_calc_itruncate_reservation(
		struct xfs_mount *mp)
		{
		return XFS_CALC_ITRUNCATE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp);
		}

		return XFS_DQUOT_LOGRES(mp) +
		MAX((mp->m_sb.sb_inodesize +
		XFS_FSB_TO_B(mp, XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) + 1) +
		128 * (2 + XFS_BM_MAXLEVELS(mp, XFS_DATA_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)) +
		128 * 5 +
		XFS_ALLOCFREE_LOG_RES(mp, 1) +
		128 * (2 + XFS_IALLOC_BLOCKS(mp) + mp->m_in_maxlevels +
		XFS_ALLOCFREE_LOG_COUNT(mp, 1))));
		}

		/*
		* In renaming a files we can modify:
		* the four inodes involved: 4 * inode size
		* the two directory btrees: 2 * (max depth + v2) * dir block size
		* the two directory bmap btrees: 2 * max depth * block size
		* And the bmap_finish transaction can free dir and bmap blocks (two sets
		* of bmap blocks) giving:
		* the agf for the ags in which the blocks live: 3 * sector size
		* the agfl for the ags in which the blocks live: 3 * sector size
		* the superblock for the free block count: sector size
		* the allocation btrees: 3 exts * 2 trees * (2 * max depth - 1) * block size
		*/
		STATIC uint
		xfs_calc_rename_reservation(xfs_mount_t *mp)
		xfs_calc_rename_reservation(
		struct xfs_mount *mp)
		{
		return XFS_CALC_RENAME_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp);
		}

		return XFS_DQUOT_LOGRES(mp) +
		MAX((4 * mp->m_sb.sb_inodesize +
		2 * XFS_DIROP_LOG_RES(mp) +
		128 * (4 + 2 * XFS_DIROP_LOG_COUNT(mp))),
		(3 * mp->m_sb.sb_sectsize +
		3 * mp->m_sb.sb_sectsize +
		mp->m_sb.sb_sectsize +
		XFS_ALLOCFREE_LOG_RES(mp, 3) +
		128 * (7 + XFS_ALLOCFREE_LOG_COUNT(mp, 3))));
		}

		/*
		* For creating a link to an inode:
		* the parent directory inode: inode size
		* the linked inode: inode size
		* the directory btree could split: (max depth + v2) * dir block size
		* the directory bmap btree could join or split: (max depth + v2) * blocksize
		* And the bmap_finish transaction can free some bmap blocks giving:
		* the agf for the ag in which the blocks live: sector size
		* the agfl for the ag in which the blocks live: sector size
		* the superblock for the free block count: sector size
		* the allocation btrees: 2 trees * (2 * max depth - 1) * block size
		*/
		STATIC uint
		xfs_calc_link_reservation(xfs_mount_t *mp)
		xfs_calc_link_reservation(
		struct xfs_mount *mp)
		{
		return XFS_CALC_LINK_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp);
		}

		return XFS_DQUOT_LOGRES(mp) +
		MAX((mp->m_sb.sb_inodesize +
		mp->m_sb.sb_inodesize +
		XFS_DIROP_LOG_RES(mp) +
		128 * (2 + XFS_DIROP_LOG_COUNT(mp))),
		(mp->m_sb.sb_sectsize +
		mp->m_sb.sb_sectsize +
		mp->m_sb.sb_sectsize +
		XFS_ALLOCFREE_LOG_RES(mp, 1) +
		128 * (3 + XFS_ALLOCFREE_LOG_COUNT(mp, 1))));
		}

		/*
		* For removing a directory entry we can modify:
		* the parent directory inode: inode size
		* the removed inode: inode size
		* the directory btree could join: (max depth + v2) * dir block size
		* the directory bmap btree could join or split: (max depth + v2) * blocksize
		* And the bmap_finish transaction can free the dir and bmap blocks 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
		*/
		STATIC uint
		xfs_calc_remove_reservation(xfs_mount_t *mp)
		xfs_calc_remove_reservation(
		struct xfs_mount *mp)
		{
		return XFS_CALC_REMOVE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp);
		}

		return XFS_DQUOT_LOGRES(mp) +
		MAX((mp->m_sb.sb_inodesize +
		mp->m_sb.sb_inodesize +
		XFS_DIROP_LOG_RES(mp) +
		128 * (2 + XFS_DIROP_LOG_COUNT(mp))),
		(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))));
		}

		/*
		* For symlink we can modify:
		* the parent directory inode: inode size
		* the new inode: inode size
		* the inode btree entry: 1 block
		* the directory btree: (max depth + v2) * dir block size
		* the directory inode's bmap btree: (max depth + v2) * block size
		* the blocks for the symlink: 1 kB
		* Or in the first xact we allocate some inodes giving:
		* the agi and agf of the ag getting the new inodes: 2 * sectorsize
		* the inode blocks allocated: XFS_IALLOC_BLOCKS * blocksize
		* the inode btree: max depth * blocksize
		* the allocation btrees: 2 trees * (2 * max depth - 1) * block size
		*/
		STATIC uint
		xfs_calc_symlink_reservation(xfs_mount_t *mp)
		xfs_calc_symlink_reservation(
		struct xfs_mount *mp)
		{
		return XFS_CALC_SYMLINK_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp);
		}

		return XFS_DQUOT_LOGRES(mp) +
		MAX((mp->m_sb.sb_inodesize +
		mp->m_sb.sb_inodesize +
		XFS_FSB_TO_B(mp, 1) +
		XFS_DIROP_LOG_RES(mp) +
		1024 +
		128 * (4 + XFS_DIROP_LOG_COUNT(mp))),
		(2 * mp->m_sb.sb_sectsize +
		XFS_FSB_TO_B(mp, XFS_IALLOC_BLOCKS(mp)) +
		XFS_FSB_TO_B(mp, mp->m_in_maxlevels) +
		XFS_ALLOCFREE_LOG_RES(mp, 1) +
		128 * (2 + XFS_IALLOC_BLOCKS(mp) + mp->m_in_maxlevels +
		XFS_ALLOCFREE_LOG_COUNT(mp, 1))));
		}

		/*
		* For create we can modify:
		* the parent directory inode: inode size
		* the new inode: inode size
		* the inode btree entry: block size
		* the superblock for the nlink flag: sector size
		* the directory btree: (max depth + v2) * dir block size
		* the directory inode's bmap btree: (max depth + v2) * block size
		* Or in the first xact we allocate some inodes giving:
		* the agi and agf of the ag getting the new inodes: 2 * sectorsize
		* the superblock for the nlink flag: sector size
		* the inode blocks allocated: XFS_IALLOC_BLOCKS * blocksize
		* the inode btree: max depth * blocksize
		* the allocation btrees: 2 trees * (max depth - 1) * block size
		*/
		STATIC uint
		xfs_calc_create_reservation(xfs_mount_t *mp)
		xfs_calc_create_reservation(
		struct xfs_mount *mp)
		{
		return XFS_CALC_CREATE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp);
		return XFS_DQUOT_LOGRES(mp) +
		MAX((mp->m_sb.sb_inodesize +
		mp->m_sb.sb_inodesize +
		mp->m_sb.sb_sectsize +
		XFS_FSB_TO_B(mp, 1) +
		XFS_DIROP_LOG_RES(mp) +
		128 * (3 + XFS_DIROP_LOG_COUNT(mp))),
		(3 * mp->m_sb.sb_sectsize +
		XFS_FSB_TO_B(mp, XFS_IALLOC_BLOCKS(mp)) +
		XFS_FSB_TO_B(mp, mp->m_in_maxlevels) +
		XFS_ALLOCFREE_LOG_RES(mp, 1) +
		128 * (2 + XFS_IALLOC_BLOCKS(mp) + mp->m_in_maxlevels +
		XFS_ALLOCFREE_LOG_COUNT(mp, 1))));
		}

		/*
		* Making a new directory is the same as creating a new file.
		*/
		STATIC uint
		xfs_calc_mkdir_reservation(xfs_mount_t *mp)
		xfs_calc_mkdir_reservation(
		struct xfs_mount *mp)
		{
		return XFS_CALC_MKDIR_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp);
		return xfs_calc_create_reservation(mp);
		}

		/*
		* In freeing an inode we can modify:
		* 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
		*/
		STATIC uint
		xfs_calc_ifree_reservation(xfs_mount_t *mp)
		xfs_calc_ifree_reservation(
		struct xfs_mount *mp)
		{
		return XFS_CALC_IFREE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp);
		return XFS_DQUOT_LOGRES(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) + mp->m_in_maxlevels +
		XFS_ALLOCFREE_LOG_COUNT(mp, 1));
		}

		/*
		* When only changing the inode we log the inode and possibly the superblock
		* We also add a bit of slop for the transaction stuff.
		*/
		STATIC uint
		xfs_calc_ichange_reservation(xfs_mount_t *mp)
		xfs_calc_ichange_reservation(
		struct xfs_mount *mp)
		{
		return XFS_CALC_ICHANGE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp);
		return XFS_DQUOT_LOGRES(mp) +
		mp->m_sb.sb_inodesize +
		mp->m_sb.sb_sectsize +
		512;

		}

		/*
		* Growing the data section of the filesystem.
		* superblock
		* agi and agf
		* allocation btrees
		*/
		STATIC uint
		xfs_calc_growdata_reservation(xfs_mount_t *mp)
		xfs_calc_growdata_reservation(
		struct xfs_mount *mp)
		{
		return XFS_CALC_GROWDATA_LOG_RES(mp);
		return mp->m_sb.sb_sectsize * 3 +
		XFS_ALLOCFREE_LOG_RES(mp, 1) +
		128 * (3 + XFS_ALLOCFREE_LOG_COUNT(mp, 1));
		}

		/*
		* 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
		*/
		STATIC uint
		xfs_calc_growrtalloc_reservation(xfs_mount_t *mp)
		xfs_calc_growrtalloc_reservation(
		struct xfs_mount *mp)
		{
		return XFS_CALC_GROWRTALLOC_LOG_RES(mp);
		return 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));
		}

		/*
		* 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
		*/
		STATIC uint
		xfs_calc_growrtzero_reservation(xfs_mount_t *mp)
		xfs_calc_growrtzero_reservation(
		struct xfs_mount *mp)
		{
		return XFS_CALC_GROWRTZERO_LOG_RES(mp);
		return mp->m_sb.sb_blocksize + 128;
		}

		/*
		* 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
		*/
		STATIC uint
		xfs_calc_growrtfree_reservation(xfs_mount_t *mp)
		xfs_calc_growrtfree_reservation(
		struct xfs_mount *mp)
		{
		return XFS_CALC_GROWRTFREE_LOG_RES(mp);
		return mp->m_sb.sb_sectsize +
		2 * mp->m_sb.sb_inodesize +
		mp->m_sb.sb_blocksize +
		mp->m_rsumsize +
		128 * 5;
		}

		/*
		* Logging the inode modification timestamp on a synchronous write.
		* inode
		*/
		STATIC uint
		xfs_calc_swrite_reservation(xfs_mount_t *mp)
		xfs_calc_swrite_reservation(
		struct xfs_mount *mp)
		{
		return XFS_CALC_SWRITE_LOG_RES(mp);
		return mp->m_sb.sb_inodesize + 128;
		}

		/*
		* Logging the inode mode bits when writing a setuid/setgid file
		* inode
		*/
		STATIC uint
		xfs_calc_writeid_reservation(xfs_mount_t *mp)
		{
		return XFS_CALC_WRITEID_LOG_RES(mp);
		return mp->m_sb.sb_inodesize + 128;
		}

		/*
		* 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
		*/
		STATIC uint
		xfs_calc_addafork_reservation(xfs_mount_t *mp)
		xfs_calc_addafork_reservation(
		struct xfs_mount *mp)
		{
		return XFS_CALC_ADDAFORK_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp);
		}

		return XFS_DQUOT_LOGRES(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));
		}

		/*
		* 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
		*/
		STATIC uint
		xfs_calc_attrinval_reservation(xfs_mount_t *mp)
		xfs_calc_attrinval_reservation(
		struct xfs_mount *mp)
		{
		return XFS_CALC_ATTRINVAL_LOG_RES(mp);
		}

		return 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))));
		}

		/*
		* 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.
		*/
		STATIC uint
		xfs_calc_attrset_reservation(xfs_mount_t *mp)
		xfs_calc_attrset_reservation(
		struct xfs_mount *mp)
		{
		return XFS_CALC_ATTRSET_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp);
		return XFS_DQUOT_LOGRES(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);
		}

		/*
		* 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
		*/
		STATIC uint
		xfs_calc_attrrm_reservation(xfs_mount_t *mp)
		xfs_calc_attrrm_reservation(
		struct xfs_mount *mp)
		{
		return XFS_CALC_ATTRRM_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp);
		return XFS_DQUOT_LOGRES(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))));
		}

		/*
		* Clearing a bad agino number in an agi hash bucket.
		*/
		STATIC uint
		xfs_calc_clear_agi_bucket_reservation(xfs_mount_t *mp)
		xfs_calc_clear_agi_bucket_reservation(
		struct xfs_mount *mp)
		{
		return XFS_CALC_CLEAR_AGI_BUCKET_LOG_RES(mp);
		return mp->m_sb.sb_sectsize + 128;
		}

		/*
		@@ -184,11 +539,10 @@ xfs_calc_clear_agi_bucket_reservation(xfs_mount_t *mp)
		*/
		void
		xfs_trans_init(
		xfs_mount_t *mp)
		struct xfs_mount *mp)
		{
		xfs_trans_reservations_t *resp;
		struct xfs_trans_reservations *resp = &mp->m_reservations;

		resp = &(mp->m_reservations);
		resp->tr_write = xfs_calc_write_reservation(mp);
		resp->tr_itruncate = xfs_calc_itruncate_reservation(mp);
		resp->tr_rename = xfs_calc_rename_reservation(mp);

fs/xfs/xfs_trans.h

+0 −411

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