diff options
Diffstat (limited to 'fs/xfs/xfs_trans.c')
| -rw-r--r-- | fs/xfs/xfs_trans.c | 118 |
1 files changed, 77 insertions, 41 deletions
diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c index 2fd7c1ff1d21..35a229981354 100644 --- a/fs/xfs/xfs_trans.c +++ b/fs/xfs/xfs_trans.c @@ -234,71 +234,93 @@ xfs_calc_remove_reservation( } /* - * For symlink we can modify: + * For create, break it in to the two cases that the transaction + * covers. We start with the modify case - allocation done by modification + * of the state of existing inodes - and the allocation case. + */ + +/* + * For create we can modify: * the parent directory inode: inode size * the new inode: inode size - * the inode btree entry: 1 block + * 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 - * the blocks for the symlink: 1 kB - * Or in the first xact we allocate some inodes giving: + */ +STATIC uint +xfs_calc_create_resv_modify( + struct xfs_mount *mp) +{ + return xfs_calc_buf_res(2, mp->m_sb.sb_inodesize) + + xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) + + (uint)XFS_FSB_TO_B(mp, 1) + + xfs_calc_buf_res(XFS_DIROP_LOG_COUNT(mp), XFS_FSB_TO_B(mp, 1)); +} + +/* + * For create we can 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 * (2 * max depth - 1) * block size + * the allocation btrees: 2 trees * (max depth - 1) * block size */ STATIC uint -xfs_calc_symlink_reservation( +xfs_calc_create_resv_alloc( + struct xfs_mount *mp) +{ + return xfs_calc_buf_res(2, mp->m_sb.sb_sectsize) + + mp->m_sb.sb_sectsize + + xfs_calc_buf_res(XFS_IALLOC_BLOCKS(mp), XFS_FSB_TO_B(mp, 1)) + + xfs_calc_buf_res(mp->m_in_maxlevels, XFS_FSB_TO_B(mp, 1)) + + xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 1), + XFS_FSB_TO_B(mp, 1)); +} + +STATIC uint +__xfs_calc_create_reservation( struct xfs_mount *mp) { return XFS_DQUOT_LOGRES(mp) + - MAX((xfs_calc_buf_res(2, mp->m_sb.sb_inodesize) + - xfs_calc_buf_res(1, XFS_FSB_TO_B(mp, 1)) + - xfs_calc_buf_res(XFS_DIROP_LOG_COUNT(mp), - XFS_FSB_TO_B(mp, 1)) + - xfs_calc_buf_res(1, 1024)), - (xfs_calc_buf_res(2, mp->m_sb.sb_sectsize) + - xfs_calc_buf_res(XFS_IALLOC_BLOCKS(mp), - XFS_FSB_TO_B(mp, 1)) + - xfs_calc_buf_res(mp->m_in_maxlevels, - XFS_FSB_TO_B(mp, 1)) + - xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 1), - XFS_FSB_TO_B(mp, 1)))); + MAX(xfs_calc_create_resv_alloc(mp), + xfs_calc_create_resv_modify(mp)); } /* - * 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: + * For icreate we can 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_calc_icreate_resv_alloc( struct xfs_mount *mp) { + return xfs_calc_buf_res(2, mp->m_sb.sb_sectsize) + + mp->m_sb.sb_sectsize + + xfs_calc_buf_res(mp->m_in_maxlevels, XFS_FSB_TO_B(mp, 1)) + + xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 1), + XFS_FSB_TO_B(mp, 1)); +} + +STATIC uint +xfs_calc_icreate_reservation(xfs_mount_t *mp) +{ return XFS_DQUOT_LOGRES(mp) + - MAX((xfs_calc_buf_res(2, mp->m_sb.sb_inodesize) + - xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) + - (uint)XFS_FSB_TO_B(mp, 1) + - xfs_calc_buf_res(XFS_DIROP_LOG_COUNT(mp), - XFS_FSB_TO_B(mp, 1))), - (xfs_calc_buf_res(2, mp->m_sb.sb_sectsize) + - mp->m_sb.sb_sectsize + - xfs_calc_buf_res(XFS_IALLOC_BLOCKS(mp), - XFS_FSB_TO_B(mp, 1)) + - xfs_calc_buf_res(mp->m_in_maxlevels, - XFS_FSB_TO_B(mp, 1)) + - xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 1), - XFS_FSB_TO_B(mp, 1)))); + MAX(xfs_calc_icreate_resv_alloc(mp), + xfs_calc_create_resv_modify(mp)); +} + +STATIC uint +xfs_calc_create_reservation( + struct xfs_mount *mp) +{ + if (xfs_sb_version_hascrc(&mp->m_sb)) + return xfs_calc_icreate_reservation(mp); + return __xfs_calc_create_reservation(mp); + } /* @@ -311,6 +333,20 @@ xfs_calc_mkdir_reservation( return xfs_calc_create_reservation(mp); } + +/* + * Making a new symplink is the same as creating a new file, but + * with the added blocks for remote symlink data which can be up to 1kB in + * length (MAXPATHLEN). + */ +STATIC uint +xfs_calc_symlink_reservation( + struct xfs_mount *mp) +{ + return xfs_calc_create_reservation(mp) + + xfs_calc_buf_res(1, MAXPATHLEN); +} + /* * In freeing an inode we can modify: * the inode being freed: inode size |