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In 'fs/xfs/libxfs/xfs_trans_resv.c', the comment for transaction of removing a directory entry writes: /* fs/xfs/libxfs/xfs_trans_resv.c begin */ /* * For removing a directory entry we can modify: * the parent directory inode: inode size * the removed inode: inode size ... xfs_calc_remove_reservation( struct xfs_mount *mp) { return XFS_DQUOT_LOGRES(mp) + xfs_calc_iunlink_add_reservation(mp) + max((xfs_calc_inode_res(mp, 1) + ... /* fs/xfs/libxfs/xfs_trans_resv.c end */ There has 2 inode size of space to be reserverd, but the actual code for inode reservation space writes. There only count for 1 inode size to be reserved in 'xfs_calc_inode_res(mp, 1)', rather than 2. Signed-off-by: hexiaole <hexiaole@kylinos.cn> Reviewed-by: Darrick J. Wong <djwong@kernel.org> [djwong: remove redundant code citations] Signed-off-by: Darrick J. Wong <djwong@kernel.org>
1029 lines
33 KiB
C
1029 lines
33 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
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* Copyright (C) 2010 Red Hat, Inc.
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* All Rights Reserved.
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*/
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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_shared.h"
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#include "xfs_format.h"
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#include "xfs_log_format.h"
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#include "xfs_trans_resv.h"
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#include "xfs_mount.h"
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#include "xfs_da_format.h"
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#include "xfs_da_btree.h"
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#include "xfs_inode.h"
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#include "xfs_bmap_btree.h"
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#include "xfs_quota.h"
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#include "xfs_trans.h"
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#include "xfs_qm.h"
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#include "xfs_trans_space.h"
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#define _ALLOC true
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#define _FREE false
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/*
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* A buffer has a format structure overhead in the log in addition
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* to the data, so we need to take this into account when reserving
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* space in a transaction for a buffer. Round the space required up
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* to a multiple of 128 bytes so that we don't change the historical
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* reservation that has been used for this overhead.
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*/
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STATIC uint
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xfs_buf_log_overhead(void)
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{
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return round_up(sizeof(struct xlog_op_header) +
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sizeof(struct xfs_buf_log_format), 128);
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}
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/*
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* Calculate out transaction log reservation per item in bytes.
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*
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* The nbufs argument is used to indicate the number of items that
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* will be changed in a transaction. size is used to tell how many
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* bytes should be reserved per item.
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*/
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STATIC uint
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xfs_calc_buf_res(
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uint nbufs,
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uint size)
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{
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return nbufs * (size + xfs_buf_log_overhead());
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}
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/*
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* Per-extent log reservation for the btree changes involved in freeing or
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* allocating an extent. In classic XFS there were two trees that will be
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* modified (bnobt + cntbt). With rmap enabled, there are three trees
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* (rmapbt). The number of blocks reserved is based on the formula:
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*
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* num trees * ((2 blocks/level * max depth) - 1)
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*
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* Keep in mind that max depth is calculated separately for each type of tree.
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*/
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uint
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xfs_allocfree_block_count(
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struct xfs_mount *mp,
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uint num_ops)
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{
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uint blocks;
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blocks = num_ops * 2 * (2 * mp->m_alloc_maxlevels - 1);
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if (xfs_has_rmapbt(mp))
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blocks += num_ops * (2 * mp->m_rmap_maxlevels - 1);
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return blocks;
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}
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/*
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* Per-extent log reservation for refcount btree changes. These are never done
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* in the same transaction as an allocation or a free, so we compute them
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* separately.
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*/
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static unsigned int
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xfs_refcountbt_block_count(
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struct xfs_mount *mp,
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unsigned int num_ops)
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{
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return num_ops * (2 * mp->m_refc_maxlevels - 1);
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}
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/*
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* Logging inodes is really tricksy. They are logged in memory format,
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* which means that what we write into the log doesn't directly translate into
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* the amount of space they use on disk.
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*
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* Case in point - btree format forks in memory format use more space than the
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* on-disk format. In memory, the buffer contains a normal btree block header so
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* the btree code can treat it as though it is just another generic buffer.
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* However, when we write it to the inode fork, we don't write all of this
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* header as it isn't needed. e.g. the root is only ever in the inode, so
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* there's no need for sibling pointers which would waste 16 bytes of space.
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*
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* Hence when we have an inode with a maximally sized btree format fork, then
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* amount of information we actually log is greater than the size of the inode
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* on disk. Hence we need an inode reservation function that calculates all this
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* correctly. So, we log:
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*
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* - 4 log op headers for object
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* - for the ilf, the inode core and 2 forks
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* - inode log format object
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* - the inode core
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* - two inode forks containing bmap btree root blocks.
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* - the btree data contained by both forks will fit into the inode size,
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* hence when combined with the inode core above, we have a total of the
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* actual inode size.
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* - the BMBT headers need to be accounted separately, as they are
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* additional to the records and pointers that fit inside the inode
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* forks.
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*/
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STATIC uint
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xfs_calc_inode_res(
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struct xfs_mount *mp,
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uint ninodes)
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{
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return ninodes *
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(4 * sizeof(struct xlog_op_header) +
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sizeof(struct xfs_inode_log_format) +
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mp->m_sb.sb_inodesize +
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2 * XFS_BMBT_BLOCK_LEN(mp));
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}
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/*
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* Inode btree record insertion/removal modifies the inode btree and free space
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* btrees (since the inobt does not use the agfl). This requires the following
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* reservation:
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*
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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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* The caller must account for SB and AG header modifications, etc.
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*/
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STATIC uint
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xfs_calc_inobt_res(
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struct xfs_mount *mp)
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{
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return xfs_calc_buf_res(M_IGEO(mp)->inobt_maxlevels,
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XFS_FSB_TO_B(mp, 1)) +
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xfs_calc_buf_res(xfs_allocfree_block_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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* The free inode btree is a conditional feature. The behavior differs slightly
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* from that of the traditional inode btree in that the finobt tracks records
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* for inode chunks with at least one free inode. A record can be removed from
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* the tree during individual inode allocation. Therefore the finobt
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* reservation is unconditional for both the inode chunk allocation and
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* individual inode allocation (modify) cases.
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*
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* Behavior aside, the reservation for finobt modification is equivalent to the
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* traditional inobt: cover a full finobt shape change plus block allocation.
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*/
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STATIC uint
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xfs_calc_finobt_res(
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struct xfs_mount *mp)
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{
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if (!xfs_has_finobt(mp))
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return 0;
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return xfs_calc_inobt_res(mp);
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}
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/*
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* Calculate the reservation required to allocate or free an inode chunk. This
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* includes:
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*
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* the allocation btrees: 2 trees * (max depth - 1) * block size
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* the inode chunk: m_ino_geo.ialloc_blks * N
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*
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* The size N of the inode chunk reservation depends on whether it is for
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* allocation or free and which type of create transaction is in use. An inode
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* chunk free always invalidates the buffers and only requires reservation for
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* headers (N == 0). An inode chunk allocation requires a chunk sized
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* reservation on v4 and older superblocks to initialize the chunk. No chunk
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* reservation is required for allocation on v5 supers, which use ordered
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* buffers to initialize.
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*/
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STATIC uint
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xfs_calc_inode_chunk_res(
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struct xfs_mount *mp,
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bool alloc)
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{
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uint res, size = 0;
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res = xfs_calc_buf_res(xfs_allocfree_block_count(mp, 1),
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XFS_FSB_TO_B(mp, 1));
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if (alloc) {
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/* icreate tx uses ordered buffers */
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if (xfs_has_v3inodes(mp))
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return res;
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size = XFS_FSB_TO_B(mp, 1);
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}
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res += xfs_calc_buf_res(M_IGEO(mp)->ialloc_blks, size);
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return res;
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}
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/*
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* Per-extent log reservation for the btree changes involved in freeing or
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* allocating a realtime extent. We have to be able to log as many rtbitmap
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* blocks as needed to mark inuse XFS_BMBT_MAX_EXTLEN blocks' worth of realtime
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* extents, as well as the realtime summary block.
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*/
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static unsigned int
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xfs_rtalloc_block_count(
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struct xfs_mount *mp,
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unsigned int num_ops)
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{
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unsigned int blksz = XFS_FSB_TO_B(mp, 1);
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unsigned int rtbmp_bytes;
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rtbmp_bytes = (XFS_MAX_BMBT_EXTLEN / mp->m_sb.sb_rextsize) / NBBY;
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return (howmany(rtbmp_bytes, blksz) + 1) * num_ops;
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}
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/*
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* Various log reservation values.
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*
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* These are based on the size of the file system block because that is what
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* most transactions manipulate. Each adds in an additional 128 bytes per
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* item logged to try to account for the overhead of the transaction mechanism.
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*
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* Note: Most of the reservations underestimate the number of allocation
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* groups into which they could free extents in the xfs_defer_finish() call.
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* This is because the number in the worst case is quite high and quite
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* unusual. In order to fix this we need to change xfs_defer_finish() to free
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* extents in only a single AG at a time. This will require changes to the
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* EFI code as well, however, so that the EFI for the extents not freed is
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* logged again in each transaction. See SGI PV #261917.
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*
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* Reservation functions here avoid a huge stack in xfs_trans_init due to
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* register overflow from temporaries in the calculations.
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*/
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/*
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* Compute the log reservation required to handle the refcount update
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* transaction. Refcount updates are always done via deferred log items.
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*
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* This is calculated as:
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* Data device refcount updates (t1):
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* the agfs of the ags containing the blocks: nr_ops * sector size
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* the refcount btrees: nr_ops * 1 trees * (2 * max depth - 1) * block size
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*/
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static unsigned int
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xfs_calc_refcountbt_reservation(
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struct xfs_mount *mp,
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unsigned int nr_ops)
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{
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unsigned int blksz = XFS_FSB_TO_B(mp, 1);
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if (!xfs_has_reflink(mp))
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return 0;
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return xfs_calc_buf_res(nr_ops, mp->m_sb.sb_sectsize) +
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xfs_calc_buf_res(xfs_refcountbt_block_count(mp, nr_ops), blksz);
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}
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/*
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* In a write transaction we can allocate a maximum of 2
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* extents. This gives (t1):
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* the inode getting the new extents: inode size
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* the inode's bmap btree: max depth * block size
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* the agfs of the ags from which the extents are allocated: 2 * sector
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* the superblock free block counter: sector size
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* the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
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* Or, if we're writing to a realtime file (t2):
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* the inode getting the new extents: inode size
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* the inode's bmap btree: max depth * block size
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* the agfs of the ags from which the extents are allocated: 2 * sector
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* the superblock free block counter: sector size
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* the realtime bitmap: ((XFS_BMBT_MAX_EXTLEN / rtextsize) / NBBY) bytes
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* the realtime summary: 1 block
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* the allocation btrees: 2 trees * (2 * max depth - 1) * block size
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* And the bmap_finish transaction can free bmap blocks in a join (t3):
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* the agfs of the ags containing the blocks: 2 * sector size
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* the agfls of the ags containing the blocks: 2 * sector size
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* the super block free block counter: sector size
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* the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
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* And any refcount updates that happen in a separate transaction (t4).
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*/
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STATIC uint
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xfs_calc_write_reservation(
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struct xfs_mount *mp,
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bool for_minlogsize)
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{
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unsigned int t1, t2, t3, t4;
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unsigned int blksz = XFS_FSB_TO_B(mp, 1);
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t1 = xfs_calc_inode_res(mp, 1) +
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xfs_calc_buf_res(XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK), blksz) +
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xfs_calc_buf_res(3, mp->m_sb.sb_sectsize) +
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xfs_calc_buf_res(xfs_allocfree_block_count(mp, 2), blksz);
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if (xfs_has_realtime(mp)) {
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t2 = xfs_calc_inode_res(mp, 1) +
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xfs_calc_buf_res(XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK),
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blksz) +
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xfs_calc_buf_res(3, mp->m_sb.sb_sectsize) +
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xfs_calc_buf_res(xfs_rtalloc_block_count(mp, 1), blksz) +
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xfs_calc_buf_res(xfs_allocfree_block_count(mp, 1), blksz);
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} else {
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t2 = 0;
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}
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t3 = xfs_calc_buf_res(5, mp->m_sb.sb_sectsize) +
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xfs_calc_buf_res(xfs_allocfree_block_count(mp, 2), blksz);
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/*
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* In the early days of reflink, we included enough reservation to log
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* two refcountbt splits for each transaction. The codebase runs
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* refcountbt updates in separate transactions now, so to compute the
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* minimum log size, add the refcountbtree splits back to t1 and t3 and
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* do not account them separately as t4. Reflink did not support
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* realtime when the reservations were established, so no adjustment to
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* t2 is needed.
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*/
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if (for_minlogsize) {
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unsigned int adj = 0;
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if (xfs_has_reflink(mp))
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adj = xfs_calc_buf_res(
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xfs_refcountbt_block_count(mp, 2),
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blksz);
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t1 += adj;
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t3 += adj;
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return XFS_DQUOT_LOGRES(mp) + max3(t1, t2, t3);
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}
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t4 = xfs_calc_refcountbt_reservation(mp, 1);
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return XFS_DQUOT_LOGRES(mp) + max(t4, max3(t1, t2, t3));
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}
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unsigned int
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xfs_calc_write_reservation_minlogsize(
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struct xfs_mount *mp)
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{
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return xfs_calc_write_reservation(mp, true);
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}
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/*
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* In truncating a file we free up to two extents at once. We can modify (t1):
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* the inode being truncated: inode size
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* the inode's bmap btree: (max depth + 1) * block size
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* And the bmap_finish transaction can free the blocks and bmap blocks (t2):
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* the agf for each of the ags: 4 * sector size
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* the agfl for each of the ags: 4 * sector size
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* the super block to reflect the freed blocks: sector size
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* worst case split in allocation btrees per extent assuming 4 extents:
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* 4 exts * 2 trees * (2 * max depth - 1) * block size
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* Or, if it's a realtime file (t3):
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* the agf for each of the ags: 2 * sector size
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* the agfl for each of the ags: 2 * sector size
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* the super block to reflect the freed blocks: sector size
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* the realtime bitmap:
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* 2 exts * ((XFS_BMBT_MAX_EXTLEN / rtextsize) / NBBY) bytes
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* the realtime summary: 2 exts * 1 block
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* worst case split in allocation btrees per extent assuming 2 extents:
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* 2 exts * 2 trees * (2 * max depth - 1) * block size
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* And any refcount updates that happen in a separate transaction (t4).
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*/
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STATIC uint
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xfs_calc_itruncate_reservation(
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struct xfs_mount *mp,
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bool for_minlogsize)
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{
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unsigned int t1, t2, t3, t4;
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unsigned int blksz = XFS_FSB_TO_B(mp, 1);
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t1 = xfs_calc_inode_res(mp, 1) +
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xfs_calc_buf_res(XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) + 1, blksz);
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t2 = xfs_calc_buf_res(9, mp->m_sb.sb_sectsize) +
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xfs_calc_buf_res(xfs_allocfree_block_count(mp, 4), blksz);
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if (xfs_has_realtime(mp)) {
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t3 = xfs_calc_buf_res(5, mp->m_sb.sb_sectsize) +
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xfs_calc_buf_res(xfs_rtalloc_block_count(mp, 2), blksz) +
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xfs_calc_buf_res(xfs_allocfree_block_count(mp, 2), blksz);
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} else {
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t3 = 0;
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}
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/*
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* In the early days of reflink, we included enough reservation to log
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* four refcountbt splits in the same transaction as bnobt/cntbt
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* updates. The codebase runs refcountbt updates in separate
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* transactions now, so to compute the minimum log size, add the
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* refcount btree splits back here and do not compute them separately
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* as t4. Reflink did not support realtime when the reservations were
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* established, so do not adjust t3.
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*/
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if (for_minlogsize) {
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if (xfs_has_reflink(mp))
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t2 += xfs_calc_buf_res(
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xfs_refcountbt_block_count(mp, 4),
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blksz);
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return XFS_DQUOT_LOGRES(mp) + max3(t1, t2, t3);
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}
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t4 = xfs_calc_refcountbt_reservation(mp, 2);
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return XFS_DQUOT_LOGRES(mp) + max(t4, max3(t1, t2, t3));
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}
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unsigned int
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xfs_calc_itruncate_reservation_minlogsize(
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struct xfs_mount *mp)
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{
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return xfs_calc_itruncate_reservation(mp, true);
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}
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/*
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* In renaming a files we can modify:
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* the four inodes involved: 4 * inode size
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* the two directory btrees: 2 * (max depth + v2) * dir block size
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* the two directory bmap btrees: 2 * max depth * block size
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* And the bmap_finish transaction can free dir and bmap blocks (two sets
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* of bmap blocks) giving:
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* the agf for the ags in which the blocks live: 3 * sector size
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* the agfl for the ags in which the blocks live: 3 * sector size
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* the superblock for the free block count: sector size
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* the allocation btrees: 3 exts * 2 trees * (2 * max depth - 1) * block size
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*/
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STATIC uint
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xfs_calc_rename_reservation(
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struct xfs_mount *mp)
|
|
{
|
|
return XFS_DQUOT_LOGRES(mp) +
|
|
max((xfs_calc_inode_res(mp, 4) +
|
|
xfs_calc_buf_res(2 * XFS_DIROP_LOG_COUNT(mp),
|
|
XFS_FSB_TO_B(mp, 1))),
|
|
(xfs_calc_buf_res(7, mp->m_sb.sb_sectsize) +
|
|
xfs_calc_buf_res(xfs_allocfree_block_count(mp, 3),
|
|
XFS_FSB_TO_B(mp, 1))));
|
|
}
|
|
|
|
/*
|
|
* For removing an inode from unlinked list at first, we can modify:
|
|
* the agi hash list and counters: sector size
|
|
* the on disk inode before ours in the agi hash list: inode cluster size
|
|
* the on disk inode in the agi hash list: inode cluster size
|
|
*/
|
|
STATIC uint
|
|
xfs_calc_iunlink_remove_reservation(
|
|
struct xfs_mount *mp)
|
|
{
|
|
return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) +
|
|
2 * M_IGEO(mp)->inode_cluster_size;
|
|
}
|
|
|
|
/*
|
|
* 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(
|
|
struct xfs_mount *mp)
|
|
{
|
|
return XFS_DQUOT_LOGRES(mp) +
|
|
xfs_calc_iunlink_remove_reservation(mp) +
|
|
max((xfs_calc_inode_res(mp, 2) +
|
|
xfs_calc_buf_res(XFS_DIROP_LOG_COUNT(mp),
|
|
XFS_FSB_TO_B(mp, 1))),
|
|
(xfs_calc_buf_res(3, mp->m_sb.sb_sectsize) +
|
|
xfs_calc_buf_res(xfs_allocfree_block_count(mp, 1),
|
|
XFS_FSB_TO_B(mp, 1))));
|
|
}
|
|
|
|
/*
|
|
* For adding an inode to unlinked list we can modify:
|
|
* the agi hash list: sector size
|
|
* the on disk inode: inode cluster size
|
|
*/
|
|
STATIC uint
|
|
xfs_calc_iunlink_add_reservation(xfs_mount_t *mp)
|
|
{
|
|
return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) +
|
|
M_IGEO(mp)->inode_cluster_size;
|
|
}
|
|
|
|
/*
|
|
* 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(
|
|
struct xfs_mount *mp)
|
|
{
|
|
return XFS_DQUOT_LOGRES(mp) +
|
|
xfs_calc_iunlink_add_reservation(mp) +
|
|
max((xfs_calc_inode_res(mp, 2) +
|
|
xfs_calc_buf_res(XFS_DIROP_LOG_COUNT(mp),
|
|
XFS_FSB_TO_B(mp, 1))),
|
|
(xfs_calc_buf_res(4, mp->m_sb.sb_sectsize) +
|
|
xfs_calc_buf_res(xfs_allocfree_block_count(mp, 2),
|
|
XFS_FSB_TO_B(mp, 1))));
|
|
}
|
|
|
|
/*
|
|
* 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: 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 finobt (record modification and allocation btrees)
|
|
*/
|
|
STATIC uint
|
|
xfs_calc_create_resv_modify(
|
|
struct xfs_mount *mp)
|
|
{
|
|
return xfs_calc_inode_res(mp, 2) +
|
|
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);
|
|
}
|
|
|
|
/*
|
|
* 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 chunk (allocation, optional init)
|
|
* the inobt (record insertion)
|
|
* the finobt (optional, record insertion)
|
|
*/
|
|
STATIC uint
|
|
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_inode_chunk_res(mp, _ALLOC) +
|
|
xfs_calc_inobt_res(mp) +
|
|
xfs_calc_finobt_res(mp);
|
|
}
|
|
|
|
STATIC uint
|
|
xfs_calc_icreate_reservation(xfs_mount_t *mp)
|
|
{
|
|
return XFS_DQUOT_LOGRES(mp) +
|
|
max(xfs_calc_icreate_resv_alloc(mp),
|
|
xfs_calc_create_resv_modify(mp));
|
|
}
|
|
|
|
STATIC uint
|
|
xfs_calc_create_tmpfile_reservation(
|
|
struct xfs_mount *mp)
|
|
{
|
|
uint res = XFS_DQUOT_LOGRES(mp);
|
|
|
|
res += xfs_calc_icreate_resv_alloc(mp);
|
|
return res + xfs_calc_iunlink_add_reservation(mp);
|
|
}
|
|
|
|
/*
|
|
* Making a new directory is the same as creating a new file.
|
|
*/
|
|
STATIC uint
|
|
xfs_calc_mkdir_reservation(
|
|
struct xfs_mount *mp)
|
|
{
|
|
return xfs_calc_icreate_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 (XFS_SYMLINK_MAXLEN).
|
|
*/
|
|
STATIC uint
|
|
xfs_calc_symlink_reservation(
|
|
struct xfs_mount *mp)
|
|
{
|
|
return xfs_calc_icreate_reservation(mp) +
|
|
xfs_calc_buf_res(1, XFS_SYMLINK_MAXLEN);
|
|
}
|
|
|
|
/*
|
|
* In freeing an inode we can modify:
|
|
* the inode being freed: inode size
|
|
* the super block free inode counter, AGF and AGFL: sector size
|
|
* the on disk inode (agi unlinked list removal)
|
|
* the inode chunk (invalidated, headers only)
|
|
* the inode btree
|
|
* the finobt (record insertion, removal or modification)
|
|
*
|
|
* Note that the inode chunk res. includes an allocfree res. for freeing of the
|
|
* inode chunk. This is technically extraneous because the inode chunk free is
|
|
* deferred (it occurs after a transaction roll). Include the extra reservation
|
|
* anyways since we've had reports of ifree transaction overruns due to too many
|
|
* agfl fixups during inode chunk frees.
|
|
*/
|
|
STATIC uint
|
|
xfs_calc_ifree_reservation(
|
|
struct xfs_mount *mp)
|
|
{
|
|
return XFS_DQUOT_LOGRES(mp) +
|
|
xfs_calc_inode_res(mp, 1) +
|
|
xfs_calc_buf_res(3, mp->m_sb.sb_sectsize) +
|
|
xfs_calc_iunlink_remove_reservation(mp) +
|
|
xfs_calc_inode_chunk_res(mp, _FREE) +
|
|
xfs_calc_inobt_res(mp) +
|
|
xfs_calc_finobt_res(mp);
|
|
}
|
|
|
|
/*
|
|
* 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(
|
|
struct xfs_mount *mp)
|
|
{
|
|
return XFS_DQUOT_LOGRES(mp) +
|
|
xfs_calc_inode_res(mp, 1) +
|
|
xfs_calc_buf_res(1, mp->m_sb.sb_sectsize);
|
|
|
|
}
|
|
|
|
/*
|
|
* Growing the data section of the filesystem.
|
|
* superblock
|
|
* agi and agf
|
|
* allocation btrees
|
|
*/
|
|
STATIC uint
|
|
xfs_calc_growdata_reservation(
|
|
struct xfs_mount *mp)
|
|
{
|
|
return xfs_calc_buf_res(3, mp->m_sb.sb_sectsize) +
|
|
xfs_calc_buf_res(xfs_allocfree_block_count(mp, 1),
|
|
XFS_FSB_TO_B(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(
|
|
struct xfs_mount *mp)
|
|
{
|
|
return xfs_calc_buf_res(2, mp->m_sb.sb_sectsize) +
|
|
xfs_calc_buf_res(XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK),
|
|
XFS_FSB_TO_B(mp, 1)) +
|
|
xfs_calc_inode_res(mp, 1) +
|
|
xfs_calc_buf_res(xfs_allocfree_block_count(mp, 1),
|
|
XFS_FSB_TO_B(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(
|
|
struct xfs_mount *mp)
|
|
{
|
|
return xfs_calc_buf_res(1, mp->m_sb.sb_blocksize);
|
|
}
|
|
|
|
/*
|
|
* 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(
|
|
struct xfs_mount *mp)
|
|
{
|
|
return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) +
|
|
xfs_calc_inode_res(mp, 2) +
|
|
xfs_calc_buf_res(1, mp->m_sb.sb_blocksize) +
|
|
xfs_calc_buf_res(1, mp->m_rsumsize);
|
|
}
|
|
|
|
/*
|
|
* Logging the inode modification timestamp on a synchronous write.
|
|
* inode
|
|
*/
|
|
STATIC uint
|
|
xfs_calc_swrite_reservation(
|
|
struct xfs_mount *mp)
|
|
{
|
|
return xfs_calc_inode_res(mp, 1);
|
|
}
|
|
|
|
/*
|
|
* Logging the inode mode bits when writing a setuid/setgid file
|
|
* inode
|
|
*/
|
|
STATIC uint
|
|
xfs_calc_writeid_reservation(
|
|
struct xfs_mount *mp)
|
|
{
|
|
return xfs_calc_inode_res(mp, 1);
|
|
}
|
|
|
|
/*
|
|
* 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(
|
|
struct xfs_mount *mp)
|
|
{
|
|
return XFS_DQUOT_LOGRES(mp) +
|
|
xfs_calc_inode_res(mp, 1) +
|
|
xfs_calc_buf_res(2, mp->m_sb.sb_sectsize) +
|
|
xfs_calc_buf_res(1, mp->m_dir_geo->blksize) +
|
|
xfs_calc_buf_res(XFS_DAENTER_BMAP1B(mp, XFS_DATA_FORK) + 1,
|
|
XFS_FSB_TO_B(mp, 1)) +
|
|
xfs_calc_buf_res(xfs_allocfree_block_count(mp, 1),
|
|
XFS_FSB_TO_B(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(
|
|
struct xfs_mount *mp)
|
|
{
|
|
return max((xfs_calc_inode_res(mp, 1) +
|
|
xfs_calc_buf_res(XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK),
|
|
XFS_FSB_TO_B(mp, 1))),
|
|
(xfs_calc_buf_res(9, mp->m_sb.sb_sectsize) +
|
|
xfs_calc_buf_res(xfs_allocfree_block_count(mp, 4),
|
|
XFS_FSB_TO_B(mp, 1))));
|
|
}
|
|
|
|
/*
|
|
* Setting an attribute at mount time.
|
|
* 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(see
|
|
* below).
|
|
*/
|
|
STATIC uint
|
|
xfs_calc_attrsetm_reservation(
|
|
struct xfs_mount *mp)
|
|
{
|
|
return XFS_DQUOT_LOGRES(mp) +
|
|
xfs_calc_inode_res(mp, 1) +
|
|
xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) +
|
|
xfs_calc_buf_res(XFS_DA_NODE_MAXDEPTH, XFS_FSB_TO_B(mp, 1));
|
|
}
|
|
|
|
/*
|
|
* Setting an attribute at runtime, transaction space unit per block.
|
|
* the superblock for allocations: sector size
|
|
* the inode bmap btree could join or split: max depth * block size
|
|
* Since the runtime attribute transaction space is dependent on the total
|
|
* blocks needed for the 1st bmap, here we calculate out the space unit for
|
|
* one block so that the caller could figure out the total space according
|
|
* to the attibute extent length in blocks by:
|
|
* ext * M_RES(mp)->tr_attrsetrt.tr_logres
|
|
*/
|
|
STATIC uint
|
|
xfs_calc_attrsetrt_reservation(
|
|
struct xfs_mount *mp)
|
|
{
|
|
return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) +
|
|
xfs_calc_buf_res(XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK),
|
|
XFS_FSB_TO_B(mp, 1));
|
|
}
|
|
|
|
/*
|
|
* 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(
|
|
struct xfs_mount *mp)
|
|
{
|
|
return XFS_DQUOT_LOGRES(mp) +
|
|
max((xfs_calc_inode_res(mp, 1) +
|
|
xfs_calc_buf_res(XFS_DA_NODE_MAXDEPTH,
|
|
XFS_FSB_TO_B(mp, 1)) +
|
|
(uint)XFS_FSB_TO_B(mp,
|
|
XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)) +
|
|
xfs_calc_buf_res(XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK), 0)),
|
|
(xfs_calc_buf_res(5, mp->m_sb.sb_sectsize) +
|
|
xfs_calc_buf_res(xfs_allocfree_block_count(mp, 2),
|
|
XFS_FSB_TO_B(mp, 1))));
|
|
}
|
|
|
|
/*
|
|
* Clearing a bad agino number in an agi hash bucket.
|
|
*/
|
|
STATIC uint
|
|
xfs_calc_clear_agi_bucket_reservation(
|
|
struct xfs_mount *mp)
|
|
{
|
|
return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize);
|
|
}
|
|
|
|
/*
|
|
* Adjusting quota limits.
|
|
* the disk quota buffer: sizeof(struct xfs_disk_dquot)
|
|
*/
|
|
STATIC uint
|
|
xfs_calc_qm_setqlim_reservation(void)
|
|
{
|
|
return xfs_calc_buf_res(1, sizeof(struct xfs_disk_dquot));
|
|
}
|
|
|
|
/*
|
|
* Allocating quota on disk if needed.
|
|
* the write transaction log space for quota file extent allocation
|
|
* the unit of quota allocation: one system block size
|
|
*/
|
|
STATIC uint
|
|
xfs_calc_qm_dqalloc_reservation(
|
|
struct xfs_mount *mp,
|
|
bool for_minlogsize)
|
|
{
|
|
return xfs_calc_write_reservation(mp, for_minlogsize) +
|
|
xfs_calc_buf_res(1,
|
|
XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB) - 1);
|
|
}
|
|
|
|
unsigned int
|
|
xfs_calc_qm_dqalloc_reservation_minlogsize(
|
|
struct xfs_mount *mp)
|
|
{
|
|
return xfs_calc_qm_dqalloc_reservation(mp, true);
|
|
}
|
|
|
|
/*
|
|
* Syncing the incore super block changes to disk.
|
|
* the super block to reflect the changes: sector size
|
|
*/
|
|
STATIC uint
|
|
xfs_calc_sb_reservation(
|
|
struct xfs_mount *mp)
|
|
{
|
|
return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize);
|
|
}
|
|
|
|
void
|
|
xfs_trans_resv_calc(
|
|
struct xfs_mount *mp,
|
|
struct xfs_trans_resv *resp)
|
|
{
|
|
int logcount_adj = 0;
|
|
|
|
/*
|
|
* The following transactions are logged in physical format and
|
|
* require a permanent reservation on space.
|
|
*/
|
|
resp->tr_write.tr_logres = xfs_calc_write_reservation(mp, false);
|
|
resp->tr_write.tr_logcount = XFS_WRITE_LOG_COUNT;
|
|
resp->tr_write.tr_logflags |= XFS_TRANS_PERM_LOG_RES;
|
|
|
|
resp->tr_itruncate.tr_logres = xfs_calc_itruncate_reservation(mp, false);
|
|
resp->tr_itruncate.tr_logcount = XFS_ITRUNCATE_LOG_COUNT;
|
|
resp->tr_itruncate.tr_logflags |= XFS_TRANS_PERM_LOG_RES;
|
|
|
|
resp->tr_rename.tr_logres = xfs_calc_rename_reservation(mp);
|
|
resp->tr_rename.tr_logcount = XFS_RENAME_LOG_COUNT;
|
|
resp->tr_rename.tr_logflags |= XFS_TRANS_PERM_LOG_RES;
|
|
|
|
resp->tr_link.tr_logres = xfs_calc_link_reservation(mp);
|
|
resp->tr_link.tr_logcount = XFS_LINK_LOG_COUNT;
|
|
resp->tr_link.tr_logflags |= XFS_TRANS_PERM_LOG_RES;
|
|
|
|
resp->tr_remove.tr_logres = xfs_calc_remove_reservation(mp);
|
|
resp->tr_remove.tr_logcount = XFS_REMOVE_LOG_COUNT;
|
|
resp->tr_remove.tr_logflags |= XFS_TRANS_PERM_LOG_RES;
|
|
|
|
resp->tr_symlink.tr_logres = xfs_calc_symlink_reservation(mp);
|
|
resp->tr_symlink.tr_logcount = XFS_SYMLINK_LOG_COUNT;
|
|
resp->tr_symlink.tr_logflags |= XFS_TRANS_PERM_LOG_RES;
|
|
|
|
resp->tr_create.tr_logres = xfs_calc_icreate_reservation(mp);
|
|
resp->tr_create.tr_logcount = XFS_CREATE_LOG_COUNT;
|
|
resp->tr_create.tr_logflags |= XFS_TRANS_PERM_LOG_RES;
|
|
|
|
resp->tr_create_tmpfile.tr_logres =
|
|
xfs_calc_create_tmpfile_reservation(mp);
|
|
resp->tr_create_tmpfile.tr_logcount = XFS_CREATE_TMPFILE_LOG_COUNT;
|
|
resp->tr_create_tmpfile.tr_logflags |= XFS_TRANS_PERM_LOG_RES;
|
|
|
|
resp->tr_mkdir.tr_logres = xfs_calc_mkdir_reservation(mp);
|
|
resp->tr_mkdir.tr_logcount = XFS_MKDIR_LOG_COUNT;
|
|
resp->tr_mkdir.tr_logflags |= XFS_TRANS_PERM_LOG_RES;
|
|
|
|
resp->tr_ifree.tr_logres = xfs_calc_ifree_reservation(mp);
|
|
resp->tr_ifree.tr_logcount = XFS_INACTIVE_LOG_COUNT;
|
|
resp->tr_ifree.tr_logflags |= XFS_TRANS_PERM_LOG_RES;
|
|
|
|
resp->tr_addafork.tr_logres = xfs_calc_addafork_reservation(mp);
|
|
resp->tr_addafork.tr_logcount = XFS_ADDAFORK_LOG_COUNT;
|
|
resp->tr_addafork.tr_logflags |= XFS_TRANS_PERM_LOG_RES;
|
|
|
|
resp->tr_attrinval.tr_logres = xfs_calc_attrinval_reservation(mp);
|
|
resp->tr_attrinval.tr_logcount = XFS_ATTRINVAL_LOG_COUNT;
|
|
resp->tr_attrinval.tr_logflags |= XFS_TRANS_PERM_LOG_RES;
|
|
|
|
resp->tr_attrsetm.tr_logres = xfs_calc_attrsetm_reservation(mp);
|
|
resp->tr_attrsetm.tr_logcount = XFS_ATTRSET_LOG_COUNT;
|
|
resp->tr_attrsetm.tr_logflags |= XFS_TRANS_PERM_LOG_RES;
|
|
|
|
resp->tr_attrrm.tr_logres = xfs_calc_attrrm_reservation(mp);
|
|
resp->tr_attrrm.tr_logcount = XFS_ATTRRM_LOG_COUNT;
|
|
resp->tr_attrrm.tr_logflags |= XFS_TRANS_PERM_LOG_RES;
|
|
|
|
resp->tr_growrtalloc.tr_logres = xfs_calc_growrtalloc_reservation(mp);
|
|
resp->tr_growrtalloc.tr_logcount = XFS_DEFAULT_PERM_LOG_COUNT;
|
|
resp->tr_growrtalloc.tr_logflags |= XFS_TRANS_PERM_LOG_RES;
|
|
|
|
resp->tr_qm_dqalloc.tr_logres = xfs_calc_qm_dqalloc_reservation(mp,
|
|
false);
|
|
resp->tr_qm_dqalloc.tr_logcount = XFS_WRITE_LOG_COUNT;
|
|
resp->tr_qm_dqalloc.tr_logflags |= XFS_TRANS_PERM_LOG_RES;
|
|
|
|
/*
|
|
* The following transactions are logged in logical format with
|
|
* a default log count.
|
|
*/
|
|
resp->tr_qm_setqlim.tr_logres = xfs_calc_qm_setqlim_reservation();
|
|
resp->tr_qm_setqlim.tr_logcount = XFS_DEFAULT_LOG_COUNT;
|
|
|
|
resp->tr_sb.tr_logres = xfs_calc_sb_reservation(mp);
|
|
resp->tr_sb.tr_logcount = XFS_DEFAULT_LOG_COUNT;
|
|
|
|
/* growdata requires permanent res; it can free space to the last AG */
|
|
resp->tr_growdata.tr_logres = xfs_calc_growdata_reservation(mp);
|
|
resp->tr_growdata.tr_logcount = XFS_DEFAULT_PERM_LOG_COUNT;
|
|
resp->tr_growdata.tr_logflags |= XFS_TRANS_PERM_LOG_RES;
|
|
|
|
/* The following transaction are logged in logical format */
|
|
resp->tr_ichange.tr_logres = xfs_calc_ichange_reservation(mp);
|
|
resp->tr_fsyncts.tr_logres = xfs_calc_swrite_reservation(mp);
|
|
resp->tr_writeid.tr_logres = xfs_calc_writeid_reservation(mp);
|
|
resp->tr_attrsetrt.tr_logres = xfs_calc_attrsetrt_reservation(mp);
|
|
resp->tr_clearagi.tr_logres = xfs_calc_clear_agi_bucket_reservation(mp);
|
|
resp->tr_growrtzero.tr_logres = xfs_calc_growrtzero_reservation(mp);
|
|
resp->tr_growrtfree.tr_logres = xfs_calc_growrtfree_reservation(mp);
|
|
|
|
/*
|
|
* Add one logcount for BUI items that appear with rmap or reflink,
|
|
* one logcount for refcount intent items, and one logcount for rmap
|
|
* intent items.
|
|
*/
|
|
if (xfs_has_reflink(mp) || xfs_has_rmapbt(mp))
|
|
logcount_adj++;
|
|
if (xfs_has_reflink(mp))
|
|
logcount_adj++;
|
|
if (xfs_has_rmapbt(mp))
|
|
logcount_adj++;
|
|
|
|
resp->tr_itruncate.tr_logcount += logcount_adj;
|
|
resp->tr_write.tr_logcount += logcount_adj;
|
|
resp->tr_qm_dqalloc.tr_logcount += logcount_adj;
|
|
}
|