diff options
| -rw-r--r-- | fs/xfs/libxfs/xfs_trans_resv.c | 84 |
1 files changed, 43 insertions, 41 deletions
diff --git a/fs/xfs/libxfs/xfs_trans_resv.c b/fs/xfs/libxfs/xfs_trans_resv.c index 037a1295d289..19f3a226a357 100644 --- a/fs/xfs/libxfs/xfs_trans_resv.c +++ b/fs/xfs/libxfs/xfs_trans_resv.c @@ -132,44 +132,43 @@ xfs_calc_inode_res( } /* - * The free inode btree is a conditional feature and the log reservation - * requirements differ slightly from that of the traditional inode allocation - * btree. The finobt tracks records for inode chunks with at least one free - * inode. A record can be removed from the tree for an inode allocation - * or free and thus the finobt reservation is unconditional across: + * Inode btree record insertion/removal modifies the inode btree and free space + * btrees (since the inobt does not use the agfl). This requires the following + * reservation: * - * - inode allocation - * - inode free - * - inode chunk allocation + * the inode btree: max depth * blocksize + * the allocation btrees: 2 trees * (max depth - 1) * block size * - * The 'modify' param indicates to include the record modification scenario. The - * 'alloc' param indicates to include the reservation for free space btree - * modifications on behalf of finobt modifications. This is required only for - * transactions that do not already account for free space btree modifications. + * The caller must account for SB and AG header modifications, etc. + */ +STATIC uint +xfs_calc_inobt_res( + struct xfs_mount *mp) +{ + return 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)); +} + +/* + * The free inode btree is a conditional feature. The behavior differs slightly + * from that of the traditional inode btree in that the finobt tracks records + * for inode chunks with at least one free inode. A record can be removed from + * the tree during individual inode allocation. Therefore the finobt + * reservation is unconditional for both the inode chunk allocation and + * individual inode allocation (modify) cases. * - * the free inode btree: max depth * block size - * the allocation btrees: 2 trees * (max depth - 1) * block size - * the free inode btree entry: block size + * Behavior aside, the reservation for finobt modification is equivalent to the + * traditional inobt: cover a full finobt shape change plus block allocation. */ STATIC uint xfs_calc_finobt_res( - struct xfs_mount *mp, - int alloc, - int modify) + struct xfs_mount *mp) { - uint res; - if (!xfs_sb_version_hasfinobt(&mp->m_sb)) return 0; - res = xfs_calc_buf_res(mp->m_in_maxlevels, XFS_FSB_TO_B(mp, 1)); - if (alloc) - res += xfs_calc_buf_res(xfs_allocfree_log_count(mp, 1), - XFS_FSB_TO_B(mp, 1)); - if (modify) - res += (uint)XFS_FSB_TO_B(mp, 1); - - return res; + return xfs_calc_inobt_res(mp); } /* @@ -373,7 +372,7 @@ xfs_calc_create_resv_modify( 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_finobt_res(mp, 1, 1); + xfs_calc_finobt_res(mp); } /* @@ -381,8 +380,8 @@ xfs_calc_create_resv_modify( * 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: mp->m_ialloc_blks * blocksize - * the inode btree: max depth * blocksize * the allocation btrees: 2 trees * (max depth - 1) * block size + * the inode btree (record insertion) */ STATIC uint xfs_calc_create_resv_alloc( @@ -391,9 +390,9 @@ xfs_calc_create_resv_alloc( return xfs_calc_buf_res(2, mp->m_sb.sb_sectsize) + mp->m_sb.sb_sectsize + xfs_calc_buf_res(mp->m_ialloc_blks, 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)); + XFS_FSB_TO_B(mp, 1)) + + xfs_calc_inobt_res(mp); } STATIC uint @@ -409,8 +408,8 @@ __xfs_calc_create_reservation( * 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 btree: max depth * blocksize * the allocation btrees: 2 trees * (max depth - 1) * block size + * the inobt (record insertion) * the finobt (record insertion) */ STATIC uint @@ -419,10 +418,10 @@ xfs_calc_icreate_resv_alloc( { 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)) + - xfs_calc_finobt_res(mp, 0, 0); + xfs_calc_inobt_res(mp) + + xfs_calc_finobt_res(mp); } STATIC uint @@ -487,9 +486,14 @@ xfs_calc_symlink_reservation( * the super block free inode counter, AGF and AGFL: sector size * the on disk inode (agi unlinked list removal) * the inode chunk is marked stale (headers only) - * the inode btree: max depth * blocksize - * the allocation btrees: 2 trees * (max depth - 1) * block size + * the inode btree * the finobt (record insertion, removal or modification) + * + * Note that the allocfree res. for the inode chunk itself is not included + * because the extent free occurs after a transaction roll. We could take the + * maximum of the pre/post roll operations, but the pre-roll reservation already + * includes at least one allocfree res. for the inobt and is thus guaranteed to + * be larger. */ STATIC uint xfs_calc_ifree_reservation( @@ -500,10 +504,8 @@ xfs_calc_ifree_reservation( xfs_calc_buf_res(3, mp->m_sb.sb_sectsize) + xfs_calc_iunlink_remove_reservation(mp) + xfs_calc_buf_res(mp->m_ialloc_blks, 0) + - 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)) + - xfs_calc_finobt_res(mp, 0, 1); + xfs_calc_inobt_res(mp) + + xfs_calc_finobt_res(mp); } /* |