mirror of https://gitee.com/openkylin/linux.git
xfs: Inode create transaction reservations
Define the log and space transaction sizes. Factor the current create log reservation macro into the two logical halves and reuse one half for the new icreate transactions. The icreate transaction is transparent to all the high level create code - the pre-calculated reservations will correctly set the reservations dependent on whether the filesystem supports the icreate transaction. Signed-off-by: Dave Chinner <david@fromorbit.com> Reviewed-by: Mark Tinguely <tinguely@sgi.com> Signed-off-by: Ben Myers <bpm@sgi.com>
This commit is contained in:
Dave Chinner
Ben Myers
parent
3ebe7d2d73
commit
b8402b4729
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@ -234,37 +234,10 @@ xfs_calc_remove_reservation(
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}
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/*
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* For symlink we can modify:
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* the parent directory inode: inode size
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* the new inode: inode size
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* the inode btree entry: 1 block
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* the directory btree: (max depth + v2) * dir block size
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* the directory inode's bmap btree: (max depth + v2) * block size
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* the blocks for the symlink: 1 kB
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* Or in the first xact we allocate some inodes giving:
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* the agi and agf of the ag getting the new inodes: 2 * sectorsize
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* the inode blocks allocated: XFS_IALLOC_BLOCKS * blocksize
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* the inode btree: max depth * blocksize
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* the allocation btrees: 2 trees * (2 * max depth - 1) * block size
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* For create, break it in to the two cases that the transaction
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* covers. We start with the modify case - allocation done by modification
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* of the state of existing inodes - and the allocation case.
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*/
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STATIC uint
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xfs_calc_symlink_reservation(
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struct xfs_mount *mp)
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{
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return XFS_DQUOT_LOGRES(mp) +
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MAX((xfs_calc_buf_res(2, mp->m_sb.sb_inodesize) +
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xfs_calc_buf_res(1, XFS_FSB_TO_B(mp, 1)) +
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xfs_calc_buf_res(XFS_DIROP_LOG_COUNT(mp),
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XFS_FSB_TO_B(mp, 1)) +
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xfs_calc_buf_res(1, 1024)),
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(xfs_calc_buf_res(2, mp->m_sb.sb_sectsize) +
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xfs_calc_buf_res(XFS_IALLOC_BLOCKS(mp),
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XFS_FSB_TO_B(mp, 1)) +
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xfs_calc_buf_res(mp->m_in_maxlevels,
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XFS_FSB_TO_B(mp, 1)) +
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xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 1),
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XFS_FSB_TO_B(mp, 1))));
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}
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/*
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* For create we can modify:
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@ -274,7 +247,19 @@ xfs_calc_symlink_reservation(
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* the superblock for the nlink flag: sector size
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* the directory btree: (max depth + v2) * dir block size
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* the directory inode's bmap btree: (max depth + v2) * block size
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* Or in the first xact we allocate some inodes giving:
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*/
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STATIC uint
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xfs_calc_create_resv_modify(
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struct xfs_mount *mp)
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{
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return xfs_calc_buf_res(2, mp->m_sb.sb_inodesize) +
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xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) +
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(uint)XFS_FSB_TO_B(mp, 1) +
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xfs_calc_buf_res(XFS_DIROP_LOG_COUNT(mp), XFS_FSB_TO_B(mp, 1));
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}
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/*
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* For create we can allocate some inodes giving:
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* the agi and agf of the ag getting the new inodes: 2 * sectorsize
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* the superblock for the nlink flag: sector size
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* the inode blocks allocated: XFS_IALLOC_BLOCKS * blocksize
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@ -282,23 +267,60 @@ xfs_calc_symlink_reservation(
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* the allocation btrees: 2 trees * (max depth - 1) * block size
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*/
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STATIC uint
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xfs_calc_create_reservation(
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xfs_calc_create_resv_alloc(
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struct xfs_mount *mp)
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{
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return xfs_calc_buf_res(2, mp->m_sb.sb_sectsize) +
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mp->m_sb.sb_sectsize +
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xfs_calc_buf_res(XFS_IALLOC_BLOCKS(mp), XFS_FSB_TO_B(mp, 1)) +
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xfs_calc_buf_res(mp->m_in_maxlevels, XFS_FSB_TO_B(mp, 1)) +
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xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 1),
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XFS_FSB_TO_B(mp, 1));
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}
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STATIC uint
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__xfs_calc_create_reservation(
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struct xfs_mount *mp)
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{
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return XFS_DQUOT_LOGRES(mp) +
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MAX((xfs_calc_buf_res(2, mp->m_sb.sb_inodesize) +
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xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) +
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(uint)XFS_FSB_TO_B(mp, 1) +
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xfs_calc_buf_res(XFS_DIROP_LOG_COUNT(mp),
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XFS_FSB_TO_B(mp, 1))),
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(xfs_calc_buf_res(2, mp->m_sb.sb_sectsize) +
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mp->m_sb.sb_sectsize +
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xfs_calc_buf_res(XFS_IALLOC_BLOCKS(mp),
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XFS_FSB_TO_B(mp, 1)) +
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xfs_calc_buf_res(mp->m_in_maxlevels,
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XFS_FSB_TO_B(mp, 1)) +
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xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 1),
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XFS_FSB_TO_B(mp, 1))));
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MAX(xfs_calc_create_resv_alloc(mp),
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xfs_calc_create_resv_modify(mp));
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}
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/*
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* For icreate we can allocate some inodes giving:
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* the agi and agf of the ag getting the new inodes: 2 * sectorsize
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* the superblock for the nlink flag: sector size
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* the inode btree: max depth * blocksize
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* the allocation btrees: 2 trees * (max depth - 1) * block size
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*/
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STATIC uint
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xfs_calc_icreate_resv_alloc(
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struct xfs_mount *mp)
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{
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return xfs_calc_buf_res(2, mp->m_sb.sb_sectsize) +
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mp->m_sb.sb_sectsize +
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xfs_calc_buf_res(mp->m_in_maxlevels, XFS_FSB_TO_B(mp, 1)) +
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xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 1),
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XFS_FSB_TO_B(mp, 1));
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}
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STATIC uint
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xfs_calc_icreate_reservation(xfs_mount_t *mp)
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{
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return XFS_DQUOT_LOGRES(mp) +
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MAX(xfs_calc_icreate_resv_alloc(mp),
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xfs_calc_create_resv_modify(mp));
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}
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STATIC uint
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xfs_calc_create_reservation(
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struct xfs_mount *mp)
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{
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if (xfs_sb_version_hascrc(&mp->m_sb))
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return xfs_calc_icreate_reservation(mp);
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return __xfs_calc_create_reservation(mp);
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}
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/*
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@ -311,6 +333,20 @@ xfs_calc_mkdir_reservation(
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return xfs_calc_create_reservation(mp);
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}
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/*
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* Making a new symplink is the same as creating a new file, but
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* with the added blocks for remote symlink data which can be up to 1kB in
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* length (MAXPATHLEN).
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*/
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STATIC uint
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xfs_calc_symlink_reservation(
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struct xfs_mount *mp)
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{
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return xfs_calc_create_reservation(mp) +
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xfs_calc_buf_res(1, MAXPATHLEN);
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}
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/*
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* In freeing an inode we can modify:
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* the inode being freed: inode size
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