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3ebe7d2d73
Introduce the inode create log item type for logical inode create logging. Instead of logging the changes in buffers, pass the range to be initialised through the log by a new transaction type. This reduces the amount of log space required to record initialisation during allocation from about 128 bytes per inode to a small fixed amount per inode extent to be initialised. This requires a new log item type to track it through the log and the AIL. This is a relatively simple item - most callbacks are noops as this item has the same life cycle as the transaction. Signed-off-by: Dave Chinner <david@fromorbit.com> Reviewed-by: Mark Tinguely <tinguely@sgi.com> Signed-off-by: Ben Myers <bpm@sgi.com>
53 lines
1.8 KiB
C
53 lines
1.8 KiB
C
/*
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* Copyright (c) 2008-2010, Dave Chinner
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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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#ifndef XFS_ICREATE_ITEM_H
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#define XFS_ICREATE_ITEM_H 1
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/*
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* on disk log item structure
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*
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* Log recovery assumes the first two entries are the type and size and they fit
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* in 32 bits. Also in host order (ugh) so they have to be 32 bit aligned so
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* decoding can be done correctly.
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*/
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struct xfs_icreate_log {
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__uint16_t icl_type; /* type of log format structure */
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__uint16_t icl_size; /* size of log format structure */
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__be32 icl_ag; /* ag being allocated in */
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__be32 icl_agbno; /* start block of inode range */
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__be32 icl_count; /* number of inodes to initialise */
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__be32 icl_isize; /* size of inodes */
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__be32 icl_length; /* length of extent to initialise */
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__be32 icl_gen; /* inode generation number to use */
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};
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/* in memory log item structure */
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struct xfs_icreate_item {
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struct xfs_log_item ic_item;
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struct xfs_icreate_log ic_format;
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};
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extern kmem_zone_t *xfs_icreate_zone; /* inode create item zone */
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void xfs_icreate_log(struct xfs_trans *tp, xfs_agnumber_t agno,
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xfs_agblock_t agbno, unsigned int count,
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unsigned int inode_size, xfs_agblock_t length,
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unsigned int generation);
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#endif /* XFS_ICREATE_ITEM_H */
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