xfs/libxfs/xfs_trans_resv.c

82  * in the same transaction as an allocation or a free, so we compute them
140  * the allocation btrees: 2 trees * (max depth - 1) * block size
158  * the tree during individual inode allocation. Therefore the finobt
159  * reservation is unconditional for both the inode chunk allocation and
160  * individual inode allocation (modify) cases.
163  * traditional inobt: cover a full finobt shape change plus block allocation.
179  * the allocation btrees: 2 trees * (max depth - 1) * block size
183  * allocation or free and which type of create transaction is in use. An inode
185  * headers (N == 0). An inode chunk allocation requires a chunk sized
187  * reservation is required for allocation on v5 supers, which use ordered
236  * Note:  Most of the reservations underestimate the number of allocation
278  *    the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
286  *    the allocation btrees: 2 trees * (2 * max depth - 1) * block size
291  *    the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
361  *    worst case split in allocation btrees per extent assuming 4 extents:
370  *    worst case split in allocation btrees per extent assuming 2 extents:
435  *    the allocation btrees: 3 exts * 2 trees * (2 * max depth - 1) * block size
474  *    the allocation btrees: 2 trees * (2 * max depth - 1) * block size
512  *    the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
530  * covers. We start with the modify case - allocation done by modification
531  * of the state of existing inodes - and the allocation case.
542  *    the finobt (record modification and allocation btrees)
559  *    the inode chunk (allocation, optional init)
662  *	allocation btrees
681  *	allocation btrees for 1 block alloc: 2 * (2 * maxdepth - 1) * blocksize
752  *	agf block and superblock (for block allocation)
755  *	allocation btrees
779  *    worst case split in allocation btrees per extent assuming 4 extents:
800  *	the inode allocation btree
843  *    the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
883  *	the write transaction log space for quota file extent allocation
884  *	the unit of quota allocation: one system block size