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>
196 lines
5 KiB
C
196 lines
5 KiB
C
/*
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* Copyright (c) 2008-2010, 2013 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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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_types.h"
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#include "xfs_bit.h"
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#include "xfs_log.h"
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#include "xfs_inum.h"
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#include "xfs_trans.h"
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#include "xfs_buf_item.h"
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#include "xfs_sb.h"
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#include "xfs_ag.h"
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#include "xfs_dir2.h"
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#include "xfs_mount.h"
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#include "xfs_trans_priv.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_attr_sf.h"
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#include "xfs_dinode.h"
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#include "xfs_inode.h"
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#include "xfs_inode_item.h"
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#include "xfs_btree.h"
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#include "xfs_ialloc.h"
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#include "xfs_error.h"
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#include "xfs_icreate_item.h"
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kmem_zone_t *xfs_icreate_zone; /* inode create item zone */
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static inline struct xfs_icreate_item *ICR_ITEM(struct xfs_log_item *lip)
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{
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return container_of(lip, struct xfs_icreate_item, ic_item);
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}
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/*
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* This returns the number of iovecs needed to log the given inode item.
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*
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* We only need one iovec for the icreate log structure.
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*/
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STATIC uint
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xfs_icreate_item_size(
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struct xfs_log_item *lip)
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{
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return 1;
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}
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/*
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* This is called to fill in the vector of log iovecs for the
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* given inode create log item.
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*/
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STATIC void
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xfs_icreate_item_format(
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struct xfs_log_item *lip,
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struct xfs_log_iovec *log_vector)
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{
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struct xfs_icreate_item *icp = ICR_ITEM(lip);
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log_vector->i_addr = (xfs_caddr_t)&icp->ic_format;
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log_vector->i_len = sizeof(struct xfs_icreate_log);
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log_vector->i_type = XLOG_REG_TYPE_ICREATE;
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}
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/* Pinning has no meaning for the create item, so just return. */
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STATIC void
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xfs_icreate_item_pin(
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struct xfs_log_item *lip)
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{
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}
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/* pinning has no meaning for the create item, so just return. */
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STATIC void
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xfs_icreate_item_unpin(
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struct xfs_log_item *lip,
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int remove)
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{
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}
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STATIC void
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xfs_icreate_item_unlock(
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struct xfs_log_item *lip)
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{
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struct xfs_icreate_item *icp = ICR_ITEM(lip);
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if (icp->ic_item.li_flags & XFS_LI_ABORTED)
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kmem_zone_free(xfs_icreate_zone, icp);
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return;
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}
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/*
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* Because we have ordered buffers being tracked in the AIL for the inode
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* creation, we don't need the create item after this. Hence we can free
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* the log item and return -1 to tell the caller we're done with the item.
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*/
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STATIC xfs_lsn_t
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xfs_icreate_item_committed(
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struct xfs_log_item *lip,
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xfs_lsn_t lsn)
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{
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struct xfs_icreate_item *icp = ICR_ITEM(lip);
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kmem_zone_free(xfs_icreate_zone, icp);
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return (xfs_lsn_t)-1;
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}
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/* item can never get into the AIL */
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STATIC uint
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xfs_icreate_item_push(
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struct xfs_log_item *lip,
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struct list_head *buffer_list)
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{
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ASSERT(0);
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return XFS_ITEM_SUCCESS;
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}
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/* Ordered buffers do the dependency tracking here, so this does nothing. */
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STATIC void
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xfs_icreate_item_committing(
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struct xfs_log_item *lip,
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xfs_lsn_t lsn)
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{
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}
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/*
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* This is the ops vector shared by all buf log items.
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*/
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static struct xfs_item_ops xfs_icreate_item_ops = {
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.iop_size = xfs_icreate_item_size,
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.iop_format = xfs_icreate_item_format,
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.iop_pin = xfs_icreate_item_pin,
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.iop_unpin = xfs_icreate_item_unpin,
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.iop_push = xfs_icreate_item_push,
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.iop_unlock = xfs_icreate_item_unlock,
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.iop_committed = xfs_icreate_item_committed,
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.iop_committing = xfs_icreate_item_committing,
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};
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/*
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* Initialize the inode log item for a newly allocated (in-core) inode.
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*
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* Inode extents can only reside within an AG. Hence specify the starting
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* block for the inode chunk by offset within an AG as well as the
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* length of the allocated extent.
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*
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* This joins the item to the transaction and marks it dirty so
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* that we don't need a separate call to do this, nor does the
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* caller need to know anything about the icreate item.
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*/
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void
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xfs_icreate_log(
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struct xfs_trans *tp,
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xfs_agnumber_t agno,
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xfs_agblock_t agbno,
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unsigned int count,
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unsigned int inode_size,
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xfs_agblock_t length,
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unsigned int generation)
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{
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struct xfs_icreate_item *icp;
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icp = kmem_zone_zalloc(xfs_icreate_zone, KM_SLEEP);
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xfs_log_item_init(tp->t_mountp, &icp->ic_item, XFS_LI_ICREATE,
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&xfs_icreate_item_ops);
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icp->ic_format.icl_type = XFS_LI_ICREATE;
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icp->ic_format.icl_size = 1; /* single vector */
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icp->ic_format.icl_ag = cpu_to_be32(agno);
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icp->ic_format.icl_agbno = cpu_to_be32(agbno);
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icp->ic_format.icl_count = cpu_to_be32(count);
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icp->ic_format.icl_isize = cpu_to_be32(inode_size);
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icp->ic_format.icl_length = cpu_to_be32(length);
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icp->ic_format.icl_gen = cpu_to_be32(generation);
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xfs_trans_add_item(tp, &icp->ic_item);
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tp->t_flags |= XFS_TRANS_DIRTY;
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icp->ic_item.li_desc->lid_flags |= XFS_LID_DIRTY;
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}
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