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@@ -0,0 +1,701 @@
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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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+ * 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_format.h"
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+#include "xfs_log.h"
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+#include "xfs_trans_resv.h"
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+#include "xfs_trans.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_error.h"
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+#include "xfs_da_btree.h"
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+#include "xfs_bmap_btree.h"
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+#include "xfs_alloc_btree.h"
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+#include "xfs_ialloc_btree.h"
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+#include "xfs_dinode.h"
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+#include "xfs_inode.h"
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+#include "xfs_btree.h"
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+#include "xfs_ialloc.h"
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+#include "xfs_alloc.h"
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+#include "xfs_extent_busy.h"
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+#include "xfs_bmap.h"
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+#include "xfs_quota.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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+/*
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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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+/*
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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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+/*
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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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+
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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_buf_res(1, mp->m_sb.sb_inodesize) +
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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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+/*
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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_buf_res(1, mp->m_sb.sb_inodesize) +
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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 + XFS_IALLOC_BLOCKS(mp) +
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+ mp->m_in_maxlevels, 0)));
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+}
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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_buf_res(4, mp->m_sb.sb_inodesize) +
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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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+/*
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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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+ MAX((xfs_calc_buf_res(2, mp->m_sb.sb_inodesize) +
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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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+/*
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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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+ MAX((xfs_calc_buf_res(2, mp->m_sb.sb_inodesize) +
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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(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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+/*
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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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+/*
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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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+ */
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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_buf_res(2, mp->m_sb.sb_inodesize) +
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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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+}
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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: XFS_IALLOC_BLOCKS * 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(XFS_IALLOC_BLOCKS(mp), 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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+
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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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+/*
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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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+ */
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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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+}
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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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+
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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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+}
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+
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+/*
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+ * Making a new directory is the same as creating a new file.
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+ */
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+STATIC uint
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+xfs_calc_mkdir_reservation(
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+ struct xfs_mount *mp)
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+{
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+ return xfs_calc_create_reservation(mp);
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+}
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+
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+
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+/*
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+ * Making a new symplink is the same as creating a new file, but
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+ * with the added blocks for remote symlink data which can be up to 1kB in
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+ * length (MAXPATHLEN).
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+ */
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+STATIC uint
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+xfs_calc_symlink_reservation(
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+ struct xfs_mount *mp)
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+{
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+ return xfs_calc_create_reservation(mp) +
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+ xfs_calc_buf_res(1, MAXPATHLEN);
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+}
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+
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+/*
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+ * In freeing an inode we can modify:
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+ * the inode being freed: inode size
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+ * the super block free inode counter: sector size
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+ * the agi hash list and counters: sector size
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+ * the inode btree entry: block size
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+ * the on disk inode before ours in the agi hash list: inode cluster 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_ifree_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_buf_res(1, mp->m_sb.sb_inodesize) +
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+ xfs_calc_buf_res(2, mp->m_sb.sb_sectsize) +
|
|
|
+ xfs_calc_buf_res(1, XFS_FSB_TO_B(mp, 1)) +
|
|
|
+ MAX((__uint16_t)XFS_FSB_TO_B(mp, 1),
|
|
|
+ XFS_INODE_CLUSTER_SIZE(mp)) +
|
|
|
+ xfs_calc_buf_res(1, 0) +
|
|
|
+ xfs_calc_buf_res(2 + XFS_IALLOC_BLOCKS(mp) +
|
|
|
+ mp->m_in_maxlevels, 0) +
|
|
|
+ xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 1),
|
|
|
+ XFS_FSB_TO_B(mp, 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) +
|
|
|
+ mp->m_sb.sb_inodesize +
|
|
|
+ mp->m_sb.sb_sectsize +
|
|
|
+ 512;
|
|
|
+
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * 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_buf_res(1, mp->m_sb.sb_inodesize) +
|
|
|
+ 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_buf_res(2, mp->m_sb.sb_inodesize) +
|
|
|
+ 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_buf_res(1, mp->m_sb.sb_inodesize);
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * Logging the inode mode bits when writing a setuid/setgid file
|
|
|
+ * inode
|
|
|
+ */
|
|
|
+STATIC uint
|
|
|
+xfs_calc_writeid_reservation(xfs_mount_t *mp)
|
|
|
+{
|
|
|
+ return xfs_calc_buf_res(1, mp->m_sb.sb_inodesize);
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * 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_buf_res(1, mp->m_sb.sb_inodesize) +
|
|
|
+ xfs_calc_buf_res(2, mp->m_sb.sb_sectsize) +
|
|
|
+ xfs_calc_buf_res(1, mp->m_dirblksize) +
|
|
|
+ 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_buf_res(1, mp->m_sb.sb_inodesize) +
|
|
|
+ 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_buf_res(1, mp->m_sb.sb_inodesize) +
|
|
|
+ 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 * XFS_ATTRSETRT_LOG_RES(mp).
|
|
|
+ */
|
|
|
+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_buf_res(1, mp->m_sb.sb_inodesize) +
|
|
|
+ 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: XFS_WRITE_LOG_RES(mp)
|
|
|
+ * the unit of quota allocation: one system block size
|
|
|
+ */
|
|
|
+STATIC uint
|
|
|
+xfs_calc_qm_dqalloc_reservation(
|
|
|
+ struct xfs_mount *mp)
|
|
|
+{
|
|
|
+ return XFS_WRITE_LOG_RES(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)
|
|
|
+{
|
|
|
+ resp->tr_write = xfs_calc_write_reservation(mp);
|
|
|
+ resp->tr_itruncate = xfs_calc_itruncate_reservation(mp);
|
|
|
+ resp->tr_rename = xfs_calc_rename_reservation(mp);
|
|
|
+ resp->tr_link = xfs_calc_link_reservation(mp);
|
|
|
+ resp->tr_remove = xfs_calc_remove_reservation(mp);
|
|
|
+ resp->tr_symlink = xfs_calc_symlink_reservation(mp);
|
|
|
+ resp->tr_create = xfs_calc_create_reservation(mp);
|
|
|
+ resp->tr_mkdir = xfs_calc_mkdir_reservation(mp);
|
|
|
+ resp->tr_ifree = xfs_calc_ifree_reservation(mp);
|
|
|
+ resp->tr_ichange = xfs_calc_ichange_reservation(mp);
|
|
|
+ resp->tr_growdata = xfs_calc_growdata_reservation(mp);
|
|
|
+ resp->tr_swrite = xfs_calc_swrite_reservation(mp);
|
|
|
+ resp->tr_writeid = xfs_calc_writeid_reservation(mp);
|
|
|
+ resp->tr_addafork = xfs_calc_addafork_reservation(mp);
|
|
|
+ resp->tr_attrinval = xfs_calc_attrinval_reservation(mp);
|
|
|
+ resp->tr_attrsetm = xfs_calc_attrsetm_reservation(mp);
|
|
|
+ resp->tr_attrsetrt = xfs_calc_attrsetrt_reservation(mp);
|
|
|
+ resp->tr_attrrm = xfs_calc_attrrm_reservation(mp);
|
|
|
+ resp->tr_clearagi = xfs_calc_clear_agi_bucket_reservation(mp);
|
|
|
+ resp->tr_growrtalloc = xfs_calc_growrtalloc_reservation(mp);
|
|
|
+ resp->tr_growrtzero = xfs_calc_growrtzero_reservation(mp);
|
|
|
+ resp->tr_growrtfree = xfs_calc_growrtfree_reservation(mp);
|
|
|
+ resp->tr_qm_sbchange = xfs_calc_qm_sbchange_reservation(mp);
|
|
|
+ resp->tr_qm_setqlim = xfs_calc_qm_setqlim_reservation(mp);
|
|
|
+ resp->tr_qm_dqalloc = xfs_calc_qm_dqalloc_reservation(mp);
|
|
|
+ resp->tr_qm_quotaoff = xfs_calc_qm_quotaoff_reservation(mp);
|
|
|
+ resp->tr_qm_equotaoff = xfs_calc_qm_quotaoff_end_reservation(mp);
|
|
|
+ resp->tr_sb = xfs_calc_sb_reservation(mp);
|
|
|
+}
|
Dave Chinner