mirror of
https://github.com/torvalds/linux
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8f66193c89
Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
894 lines
29 KiB
C
894 lines
29 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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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_sb.h"
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#include "xfs_ag.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_ialloc.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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#include "xfs_trace.h"
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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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* 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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* The free inode btree is a conditional feature and the log reservation
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* requirements differ slightly from that of the traditional inode allocation
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* btree. The finobt tracks records for inode chunks with at least one free
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* inode. A record can be removed from the tree for an inode allocation
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* or free and thus the finobt reservation is unconditional across:
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*
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* - inode allocation
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* - inode free
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* - inode chunk allocation
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*
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* The 'modify' param indicates to include the record modification scenario. The
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* 'alloc' param indicates to include the reservation for free space btree
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* modifications on behalf of finobt modifications. This is required only for
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* transactions that do not already account for free space btree modifications.
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*
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* the free inode btree: max depth * block size
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* the allocation btrees: 2 trees * (max depth - 1) * block size
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* the free inode btree entry: block size
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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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int alloc,
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int modify)
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{
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uint res;
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if (!xfs_sb_version_hasfinobt(&mp->m_sb))
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return 0;
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res = xfs_calc_buf_res(mp->m_in_maxlevels, XFS_FSB_TO_B(mp, 1));
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if (alloc)
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res += xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 1),
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XFS_FSB_TO_B(mp, 1));
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if (modify)
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res += (uint)XFS_FSB_TO_B(mp, 1);
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return res;
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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_bmap_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_bmap_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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* In a write transaction we can allocate a maximum of 2
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* extents. This gives:
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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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* And the bmap_finish transaction can free bmap blocks in a join:
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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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*/
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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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{
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return XFS_DQUOT_LOGRES(mp) +
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MAX((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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XFS_FSB_TO_B(mp, 1)) +
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xfs_calc_buf_res(3, mp->m_sb.sb_sectsize) +
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xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 2),
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XFS_FSB_TO_B(mp, 1))),
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(xfs_calc_buf_res(5, mp->m_sb.sb_sectsize) +
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xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 2),
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XFS_FSB_TO_B(mp, 1))));
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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:
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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:
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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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* 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_itruncate_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_inode_res(mp, 1) +
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xfs_calc_buf_res(XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) + 1,
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XFS_FSB_TO_B(mp, 1))),
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(xfs_calc_buf_res(9, mp->m_sb.sb_sectsize) +
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xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 4),
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XFS_FSB_TO_B(mp, 1)) +
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xfs_calc_buf_res(5, 0) +
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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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xfs_calc_buf_res(2 + mp->m_ialloc_blks +
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mp->m_in_maxlevels, 0)));
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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)
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{
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return XFS_DQUOT_LOGRES(mp) +
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MAX((xfs_calc_inode_res(mp, 4) +
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xfs_calc_buf_res(2 * XFS_DIROP_LOG_COUNT(mp),
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XFS_FSB_TO_B(mp, 1))),
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(xfs_calc_buf_res(7, mp->m_sb.sb_sectsize) +
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xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 3),
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XFS_FSB_TO_B(mp, 1))));
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}
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/*
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* For removing an inode from unlinked list at first, we can modify:
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* the agi hash list and counters: sector size
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* the on disk inode before ours in the agi hash list: inode cluster size
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*/
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STATIC uint
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xfs_calc_iunlink_remove_reservation(
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struct xfs_mount *mp)
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{
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return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) +
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max_t(uint, XFS_FSB_TO_B(mp, 1), mp->m_inode_cluster_size);
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}
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/*
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* For creating a link to an inode:
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* the parent directory inode: inode size
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* the linked inode: inode size
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* the directory btree could split: (max depth + v2) * dir block size
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* the directory bmap btree could join or split: (max depth + v2) * blocksize
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* And the bmap_finish transaction can free some bmap blocks giving:
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* the agf for the ag in which the blocks live: sector size
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* the agfl for the ag in which the blocks live: sector size
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* the superblock for the free block count: sector size
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* the allocation btrees: 2 trees * (2 * max depth - 1) * block size
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*/
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STATIC uint
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xfs_calc_link_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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xfs_calc_iunlink_remove_reservation(mp) +
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MAX((xfs_calc_inode_res(mp, 2) +
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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(3, mp->m_sb.sb_sectsize) +
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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 adding an inode to unlinked list we can modify:
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* the agi hash list: sector size
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* the unlinked inode: inode size
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*/
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STATIC uint
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xfs_calc_iunlink_add_reservation(xfs_mount_t *mp)
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{
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return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) +
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xfs_calc_inode_res(mp, 1);
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}
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/*
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* For removing a directory entry we can modify:
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* the parent directory inode: inode size
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* the removed inode: inode size
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* the directory btree could join: (max depth + v2) * dir block size
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* the directory bmap btree could join or split: (max depth + v2) * blocksize
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* And the bmap_finish transaction can free the dir and bmap blocks giving:
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* the agf for the ag in which the blocks live: 2 * sector size
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* the agfl for the ag in which the blocks live: 2 * sector size
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* the superblock for the free block count: sector size
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* the allocation btrees: 2 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_remove_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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xfs_calc_iunlink_add_reservation(mp) +
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MAX((xfs_calc_inode_res(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(4, mp->m_sb.sb_sectsize) +
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xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 2),
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XFS_FSB_TO_B(mp, 1))));
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}
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/*
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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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/*
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* For create 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: block size
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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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* the finobt (record modification and allocation btrees)
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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_inode_res(mp, 2) +
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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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xfs_calc_finobt_res(mp, 1, 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: mp->m_ialloc_blks * blocksize
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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_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(mp->m_ialloc_blks, 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_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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* the finobt (record insertion)
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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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xfs_calc_finobt_res(mp, 0, 0);
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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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STATIC uint
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xfs_calc_create_tmpfile_reservation(
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struct xfs_mount *mp)
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{
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uint res = XFS_DQUOT_LOGRES(mp);
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if (xfs_sb_version_hascrc(&mp->m_sb))
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res += xfs_calc_icreate_resv_alloc(mp);
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else
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res += xfs_calc_create_resv_alloc(mp);
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return res + xfs_calc_iunlink_add_reservation(mp);
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}
|
|
|
|
/*
|
|
* 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_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
|
|
* the super block free inode counter: sector size
|
|
* the agi hash list and counters: sector size
|
|
* the inode btree entry: block size
|
|
* the on disk inode before ours in the agi hash list: inode cluster size
|
|
* the inode btree: max depth * blocksize
|
|
* the allocation btrees: 2 trees * (max depth - 1) * block size
|
|
* the finobt (record insertion, removal or modification)
|
|
*/
|
|
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(1, mp->m_sb.sb_sectsize) +
|
|
xfs_calc_buf_res(1, XFS_FSB_TO_B(mp, 1)) +
|
|
xfs_calc_iunlink_remove_reservation(mp) +
|
|
xfs_calc_buf_res(1, 0) +
|
|
xfs_calc_buf_res(2 + mp->m_ialloc_blks +
|
|
mp->m_in_maxlevels, 0) +
|
|
xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 1),
|
|
XFS_FSB_TO_B(mp, 1)) +
|
|
xfs_calc_finobt_res(mp, 0, 1);
|
|
}
|
|
|
|
/*
|
|
* 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_LOG_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_LOG_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_LOG_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_LOG_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_LOG_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);
|
|
}
|
|
|
|
/*
|
|
* Clearing the quotaflags in the superblock.
|
|
* the super block for changing quota flags: sector size
|
|
*/
|
|
STATIC uint
|
|
xfs_calc_qm_sbchange_reservation(
|
|
struct xfs_mount *mp)
|
|
{
|
|
return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize);
|
|
}
|
|
|
|
/*
|
|
* Adjusting quota limits.
|
|
* the xfs_disk_dquot_t: sizeof(struct xfs_disk_dquot)
|
|
*/
|
|
STATIC uint
|
|
xfs_calc_qm_setqlim_reservation(
|
|
struct xfs_mount *mp)
|
|
{
|
|
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)
|
|
{
|
|
return xfs_calc_write_reservation(mp) +
|
|
xfs_calc_buf_res(1,
|
|
XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB) - 1);
|
|
}
|
|
|
|
/*
|
|
* Turning off quotas.
|
|
* the xfs_qoff_logitem_t: sizeof(struct xfs_qoff_logitem) * 2
|
|
* the superblock for the quota flags: sector size
|
|
*/
|
|
STATIC uint
|
|
xfs_calc_qm_quotaoff_reservation(
|
|
struct xfs_mount *mp)
|
|
{
|
|
return sizeof(struct xfs_qoff_logitem) * 2 +
|
|
xfs_calc_buf_res(1, mp->m_sb.sb_sectsize);
|
|
}
|
|
|
|
/*
|
|
* End of turning off quotas.
|
|
* the xfs_qoff_logitem_t: sizeof(struct xfs_qoff_logitem) * 2
|
|
*/
|
|
STATIC uint
|
|
xfs_calc_qm_quotaoff_end_reservation(
|
|
struct xfs_mount *mp)
|
|
{
|
|
return sizeof(struct xfs_qoff_logitem) * 2;
|
|
}
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
/*
|
|
* 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);
|
|
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);
|
|
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_create_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);
|
|
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_sbchange.tr_logres = xfs_calc_qm_sbchange_reservation(mp);
|
|
resp->tr_qm_sbchange.tr_logcount = XFS_DEFAULT_LOG_COUNT;
|
|
|
|
resp->tr_qm_setqlim.tr_logres = xfs_calc_qm_setqlim_reservation(mp);
|
|
resp->tr_qm_setqlim.tr_logcount = XFS_DEFAULT_LOG_COUNT;
|
|
|
|
resp->tr_qm_quotaoff.tr_logres = xfs_calc_qm_quotaoff_reservation(mp);
|
|
resp->tr_qm_quotaoff.tr_logcount = XFS_DEFAULT_LOG_COUNT;
|
|
|
|
resp->tr_qm_equotaoff.tr_logres =
|
|
xfs_calc_qm_quotaoff_end_reservation(mp);
|
|
resp->tr_qm_equotaoff.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;
|
|
|
|
/* The following transaction are logged in logical format */
|
|
resp->tr_ichange.tr_logres = xfs_calc_ichange_reservation(mp);
|
|
resp->tr_growdata.tr_logres = xfs_calc_growdata_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);
|
|
}
|