2008-10-30 07:06:08 +01:00
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/*
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* Copyright (c) 2000-2005 Silicon Graphics, 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_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_sb.h"
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#include "xfs_ag.h"
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#include "xfs_dir2.h"
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#include "xfs_dmapi.h"
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#include "xfs_mount.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_btree.h"
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#include "xfs_dir2_sf.h"
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#include "xfs_attr_sf.h"
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#include "xfs_inode.h"
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#include "xfs_dinode.h"
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#include "xfs_error.h"
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#include "xfs_mru_cache.h"
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#include "xfs_filestream.h"
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#include "xfs_vnodeops.h"
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#include "xfs_utils.h"
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#include "xfs_buf_item.h"
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#include "xfs_inode_item.h"
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#include "xfs_rw.h"
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2009-06-08 15:33:32 +02:00
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#include "xfs_quota.h"
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2008-10-30 07:06:08 +01:00
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2008-10-30 07:06:18 +01:00
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#include <linux/kthread.h>
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#include <linux/freezer.h>
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2009-06-08 15:35:03 +02:00
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2009-06-08 15:35:07 +02:00
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/* must be called with pag_ici_lock held and releases it */
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STATIC int
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xfs_sync_inode_valid(
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struct xfs_inode *ip,
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struct xfs_perag *pag)
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{
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struct inode *inode = VFS_I(ip);
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/* nothing to sync during shutdown */
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if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
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read_unlock(&pag->pag_ici_lock);
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return EFSCORRUPTED;
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}
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/*
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* If we can't get a reference on the inode, it must be in reclaim.
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* Leave it for the reclaim code to flush. Also avoid inodes that
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* haven't been fully initialised.
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*/
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if (!igrab(inode)) {
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read_unlock(&pag->pag_ici_lock);
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return ENOENT;
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}
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read_unlock(&pag->pag_ici_lock);
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if (is_bad_inode(inode) || xfs_iflags_test(ip, XFS_INEW)) {
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IRELE(ip);
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return ENOENT;
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}
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return 0;
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}
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2009-06-08 15:35:03 +02:00
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STATIC int
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xfs_sync_inode_data(
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struct xfs_inode *ip,
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int flags)
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{
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struct inode *inode = VFS_I(ip);
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struct address_space *mapping = inode->i_mapping;
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int error = 0;
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if (!mapping_tagged(mapping, PAGECACHE_TAG_DIRTY))
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goto out_wait;
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if (!xfs_ilock_nowait(ip, XFS_IOLOCK_SHARED)) {
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if (flags & SYNC_TRYLOCK)
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goto out_wait;
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xfs_ilock(ip, XFS_IOLOCK_SHARED);
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}
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error = xfs_flush_pages(ip, 0, -1, (flags & SYNC_WAIT) ?
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0 : XFS_B_ASYNC, FI_NONE);
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xfs_iunlock(ip, XFS_IOLOCK_SHARED);
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out_wait:
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if (flags & SYNC_IOWAIT)
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xfs_ioend_wait(ip);
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return error;
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}
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2009-06-08 15:35:05 +02:00
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STATIC int
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xfs_sync_inode_attr(
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struct xfs_inode *ip,
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int flags)
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{
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int error = 0;
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xfs_ilock(ip, XFS_ILOCK_SHARED);
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if (xfs_inode_clean(ip))
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goto out_unlock;
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if (!xfs_iflock_nowait(ip)) {
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if (!(flags & SYNC_WAIT))
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goto out_unlock;
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xfs_iflock(ip);
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}
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if (xfs_inode_clean(ip)) {
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xfs_ifunlock(ip);
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goto out_unlock;
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}
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error = xfs_iflush(ip, (flags & SYNC_WAIT) ?
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XFS_IFLUSH_SYNC : XFS_IFLUSH_DELWRI);
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out_unlock:
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xfs_iunlock(ip, XFS_ILOCK_SHARED);
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return error;
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}
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2008-10-30 07:06:08 +01:00
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/*
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2008-10-30 07:07:29 +01:00
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* Sync all the inodes in the given AG according to the
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* direction given by the flags.
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2008-10-30 07:06:08 +01:00
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*/
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2008-10-30 07:07:29 +01:00
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STATIC int
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xfs_sync_inodes_ag(
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2008-10-30 07:06:08 +01:00
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xfs_mount_t *mp,
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2008-10-30 07:07:29 +01:00
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int ag,
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2008-10-30 07:15:12 +01:00
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int flags)
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2008-10-30 07:06:08 +01:00
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{
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2008-10-30 07:07:29 +01:00
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xfs_perag_t *pag = &mp->m_perag[ag];
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int nr_found;
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2008-10-30 07:38:00 +01:00
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uint32_t first_index = 0;
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2008-10-30 07:07:29 +01:00
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int error = 0;
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int last_error = 0;
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2008-10-30 07:06:08 +01:00
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do {
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2008-10-30 07:15:03 +01:00
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xfs_inode_t *ip = NULL;
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2008-10-30 07:06:08 +01:00
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/*
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2008-10-30 07:07:29 +01:00
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* use a gang lookup to find the next inode in the tree
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* as the tree is sparse and a gang lookup walks to find
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* the number of objects requested.
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2008-10-30 07:06:08 +01:00
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*/
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2008-10-30 07:07:29 +01:00
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read_lock(&pag->pag_ici_lock);
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nr_found = radix_tree_gang_lookup(&pag->pag_ici_root,
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(void**)&ip, first_index, 1);
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2008-10-30 07:06:08 +01:00
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2008-10-30 07:07:29 +01:00
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if (!nr_found) {
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read_unlock(&pag->pag_ici_lock);
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break;
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2008-10-30 07:06:08 +01:00
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}
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2008-10-30 07:38:00 +01:00
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/*
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* Update the index for the next lookup. Catch overflows
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* into the next AG range which can occur if we have inodes
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* in the last block of the AG and we are currently
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* pointing to the last inode.
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*/
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2008-10-30 07:07:29 +01:00
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first_index = XFS_INO_TO_AGINO(mp, ip->i_ino + 1);
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2008-10-30 07:38:00 +01:00
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if (first_index < XFS_INO_TO_AGINO(mp, ip->i_ino)) {
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read_unlock(&pag->pag_ici_lock);
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break;
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}
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2008-10-30 07:06:08 +01:00
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2009-06-08 15:35:07 +02:00
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error = xfs_sync_inode_valid(ip, pag);
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if (error) {
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if (error == EFSCORRUPTED)
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return 0;
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2008-10-30 08:03:14 +01:00
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continue;
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2008-10-30 07:06:08 +01:00
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}
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2008-10-30 07:15:03 +01:00
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2008-10-30 07:06:08 +01:00
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/*
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* If we have to flush data or wait for I/O completion
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2008-10-30 08:03:14 +01:00
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* we need to hold the iolock.
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2008-10-30 07:06:08 +01:00
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*/
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2009-06-08 15:35:03 +02:00
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if (flags & SYNC_DELWRI)
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error = xfs_sync_inode_data(ip, flags);
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2008-10-30 07:06:08 +01:00
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2009-06-08 15:35:05 +02:00
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if (flags & SYNC_ATTR)
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error = xfs_sync_inode_attr(ip, flags);
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IRELE(ip);
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2008-10-30 07:06:08 +01:00
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2008-10-30 07:07:29 +01:00
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if (error)
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2008-10-30 07:06:08 +01:00
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last_error = error;
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/*
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* bail out if the filesystem is corrupted.
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*/
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2008-10-30 07:07:29 +01:00
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if (error == EFSCORRUPTED)
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2008-10-30 07:06:08 +01:00
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return XFS_ERROR(error);
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2008-10-30 07:07:29 +01:00
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} while (nr_found);
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2008-10-30 07:06:08 +01:00
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2008-10-30 07:07:29 +01:00
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return last_error;
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}
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2008-10-30 07:06:08 +01:00
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2008-10-30 07:07:29 +01:00
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int
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xfs_sync_inodes(
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xfs_mount_t *mp,
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2008-10-30 07:15:12 +01:00
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int flags)
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2008-10-30 07:07:29 +01:00
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{
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int error;
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int last_error;
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int i;
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2008-10-30 07:15:50 +01:00
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int lflags = XFS_LOG_FORCE;
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2008-10-30 07:06:08 +01:00
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2008-10-30 07:07:29 +01:00
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if (mp->m_flags & XFS_MOUNT_RDONLY)
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return 0;
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error = 0;
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last_error = 0;
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2008-10-30 07:06:08 +01:00
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2008-10-30 07:15:50 +01:00
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if (flags & SYNC_WAIT)
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lflags |= XFS_LOG_SYNC;
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2008-10-30 07:07:29 +01:00
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for (i = 0; i < mp->m_sb.sb_agcount; i++) {
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if (!mp->m_perag[i].pag_ici_init)
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continue;
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2008-10-30 07:15:12 +01:00
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error = xfs_sync_inodes_ag(mp, i, flags);
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2008-10-30 07:07:29 +01:00
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if (error)
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last_error = error;
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if (error == EFSCORRUPTED)
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break;
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}
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2008-10-30 07:15:50 +01:00
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if (flags & SYNC_DELWRI)
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xfs_log_force(mp, 0, lflags);
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2008-10-30 07:06:08 +01:00
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return XFS_ERROR(last_error);
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}
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2008-10-30 07:14:53 +01:00
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STATIC int
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xfs_commit_dummy_trans(
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struct xfs_mount *mp,
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uint log_flags)
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{
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struct xfs_inode *ip = mp->m_rootip;
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struct xfs_trans *tp;
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int error;
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/*
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* Put a dummy transaction in the log to tell recovery
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* that all others are OK.
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*/
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tp = xfs_trans_alloc(mp, XFS_TRANS_DUMMY1);
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error = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
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if (error) {
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xfs_trans_cancel(tp, 0);
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return error;
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}
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xfs_ilock(ip, XFS_ILOCK_EXCL);
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xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
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xfs_trans_ihold(tp, ip);
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xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
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/* XXX(hch): ignoring the error here.. */
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error = xfs_trans_commit(tp, 0);
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xfs_iunlock(ip, XFS_ILOCK_EXCL);
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xfs_log_force(mp, 0, log_flags);
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return 0;
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}
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|
2008-10-30 07:15:50 +01:00
|
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int
|
2008-10-30 07:14:53 +01:00
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xfs_sync_fsdata(
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struct xfs_mount *mp,
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int flags)
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{
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struct xfs_buf *bp;
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struct xfs_buf_log_item *bip;
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int error = 0;
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/*
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* If this is xfssyncd() then only sync the superblock if we can
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* lock it without sleeping and it is not pinned.
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*/
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if (flags & SYNC_BDFLUSH) {
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ASSERT(!(flags & SYNC_WAIT));
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bp = xfs_getsb(mp, XFS_BUF_TRYLOCK);
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if (!bp)
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goto out;
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bip = XFS_BUF_FSPRIVATE(bp, struct xfs_buf_log_item *);
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if (!bip || !xfs_buf_item_dirty(bip) || XFS_BUF_ISPINNED(bp))
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goto out_brelse;
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} else {
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bp = xfs_getsb(mp, 0);
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/*
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* If the buffer is pinned then push on the log so we won't
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* get stuck waiting in the write for someone, maybe
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* ourselves, to flush the log.
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*
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* Even though we just pushed the log above, we did not have
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* the superblock buffer locked at that point so it can
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* become pinned in between there and here.
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*/
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if (XFS_BUF_ISPINNED(bp))
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xfs_log_force(mp, 0, XFS_LOG_FORCE);
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}
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if (flags & SYNC_WAIT)
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XFS_BUF_UNASYNC(bp);
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else
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XFS_BUF_ASYNC(bp);
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return xfs_bwrite(mp, bp);
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out_brelse:
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|
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xfs_buf_relse(bp);
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out:
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|
|
return error;
|
2008-10-30 07:15:50 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2008-10-30 07:16:11 +01:00
|
|
|
* When remounting a filesystem read-only or freezing the filesystem, we have
|
|
|
|
* two phases to execute. This first phase is syncing the data before we
|
|
|
|
* quiesce the filesystem, and the second is flushing all the inodes out after
|
|
|
|
* we've waited for all the transactions created by the first phase to
|
|
|
|
* complete. The second phase ensures that the inodes are written to their
|
|
|
|
* location on disk rather than just existing in transactions in the log. This
|
|
|
|
* means after a quiesce there is no log replay required to write the inodes to
|
|
|
|
* disk (this is the main difference between a sync and a quiesce).
|
|
|
|
*/
|
|
|
|
/*
|
|
|
|
* First stage of freeze - no writers will make progress now we are here,
|
2008-10-30 07:15:50 +01:00
|
|
|
* so we flush delwri and delalloc buffers here, then wait for all I/O to
|
|
|
|
* complete. Data is frozen at that point. Metadata is not frozen,
|
2008-10-30 07:16:11 +01:00
|
|
|
* transactions can still occur here so don't bother flushing the buftarg
|
|
|
|
* because it'll just get dirty again.
|
2008-10-30 07:15:50 +01:00
|
|
|
*/
|
|
|
|
int
|
|
|
|
xfs_quiesce_data(
|
|
|
|
struct xfs_mount *mp)
|
|
|
|
{
|
|
|
|
int error;
|
|
|
|
|
|
|
|
/* push non-blocking */
|
|
|
|
xfs_sync_inodes(mp, SYNC_DELWRI|SYNC_BDFLUSH);
|
2009-06-08 15:33:32 +02:00
|
|
|
xfs_qm_sync(mp, SYNC_BDFLUSH);
|
2008-10-30 07:15:50 +01:00
|
|
|
xfs_filestream_flush(mp);
|
|
|
|
|
|
|
|
/* push and block */
|
|
|
|
xfs_sync_inodes(mp, SYNC_DELWRI|SYNC_WAIT|SYNC_IOWAIT);
|
2009-06-08 15:33:32 +02:00
|
|
|
xfs_qm_sync(mp, SYNC_WAIT);
|
2008-10-30 07:15:50 +01:00
|
|
|
|
2008-10-30 07:16:11 +01:00
|
|
|
/* write superblock and hoover up shutdown errors */
|
2008-10-30 07:15:50 +01:00
|
|
|
error = xfs_sync_fsdata(mp, 0);
|
|
|
|
|
2008-10-30 07:16:11 +01:00
|
|
|
/* flush data-only devices */
|
2008-10-30 07:15:50 +01:00
|
|
|
if (mp->m_rtdev_targp)
|
|
|
|
XFS_bflush(mp->m_rtdev_targp);
|
|
|
|
|
|
|
|
return error;
|
2008-10-30 07:14:53 +01:00
|
|
|
}
|
|
|
|
|
2008-10-30 07:16:21 +01:00
|
|
|
STATIC void
|
|
|
|
xfs_quiesce_fs(
|
|
|
|
struct xfs_mount *mp)
|
|
|
|
{
|
|
|
|
int count = 0, pincount;
|
|
|
|
|
|
|
|
xfs_flush_buftarg(mp->m_ddev_targp, 0);
|
2009-06-08 15:35:12 +02:00
|
|
|
xfs_reclaim_inodes(mp, XFS_IFLUSH_DELWRI_ELSE_ASYNC);
|
2008-10-30 07:16:21 +01:00
|
|
|
|
|
|
|
/*
|
|
|
|
* This loop must run at least twice. The first instance of the loop
|
|
|
|
* will flush most meta data but that will generate more meta data
|
|
|
|
* (typically directory updates). Which then must be flushed and
|
|
|
|
* logged before we can write the unmount record.
|
|
|
|
*/
|
|
|
|
do {
|
|
|
|
xfs_sync_inodes(mp, SYNC_ATTR|SYNC_WAIT);
|
|
|
|
pincount = xfs_flush_buftarg(mp->m_ddev_targp, 1);
|
|
|
|
if (!pincount) {
|
|
|
|
delay(50);
|
|
|
|
count++;
|
|
|
|
}
|
|
|
|
} while (count < 2);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Second stage of a quiesce. The data is already synced, now we have to take
|
|
|
|
* care of the metadata. New transactions are already blocked, so we need to
|
|
|
|
* wait for any remaining transactions to drain out before proceding.
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
xfs_quiesce_attr(
|
|
|
|
struct xfs_mount *mp)
|
|
|
|
{
|
|
|
|
int error = 0;
|
|
|
|
|
|
|
|
/* wait for all modifications to complete */
|
|
|
|
while (atomic_read(&mp->m_active_trans) > 0)
|
|
|
|
delay(100);
|
|
|
|
|
|
|
|
/* flush inodes and push all remaining buffers out to disk */
|
|
|
|
xfs_quiesce_fs(mp);
|
|
|
|
|
2009-01-23 04:34:05 +01:00
|
|
|
/*
|
|
|
|
* Just warn here till VFS can correctly support
|
|
|
|
* read-only remount without racing.
|
|
|
|
*/
|
|
|
|
WARN_ON(atomic_read(&mp->m_active_trans) != 0);
|
2008-10-30 07:16:21 +01:00
|
|
|
|
|
|
|
/* Push the superblock and write an unmount record */
|
|
|
|
error = xfs_log_sbcount(mp, 1);
|
|
|
|
if (error)
|
|
|
|
xfs_fs_cmn_err(CE_WARN, mp,
|
|
|
|
"xfs_attr_quiesce: failed to log sb changes. "
|
|
|
|
"Frozen image may not be consistent.");
|
|
|
|
xfs_log_unmount_write(mp);
|
|
|
|
xfs_unmountfs_writesb(mp);
|
|
|
|
}
|
|
|
|
|
2008-10-30 07:06:18 +01:00
|
|
|
/*
|
|
|
|
* Enqueue a work item to be picked up by the vfs xfssyncd thread.
|
|
|
|
* Doing this has two advantages:
|
|
|
|
* - It saves on stack space, which is tight in certain situations
|
|
|
|
* - It can be used (with care) as a mechanism to avoid deadlocks.
|
|
|
|
* Flushing while allocating in a full filesystem requires both.
|
|
|
|
*/
|
|
|
|
STATIC void
|
|
|
|
xfs_syncd_queue_work(
|
|
|
|
struct xfs_mount *mp,
|
|
|
|
void *data,
|
2009-04-06 18:47:27 +02:00
|
|
|
void (*syncer)(struct xfs_mount *, void *),
|
|
|
|
struct completion *completion)
|
2008-10-30 07:06:18 +01:00
|
|
|
{
|
2009-04-06 18:44:54 +02:00
|
|
|
struct xfs_sync_work *work;
|
2008-10-30 07:06:18 +01:00
|
|
|
|
2009-04-06 18:44:54 +02:00
|
|
|
work = kmem_alloc(sizeof(struct xfs_sync_work), KM_SLEEP);
|
2008-10-30 07:06:18 +01:00
|
|
|
INIT_LIST_HEAD(&work->w_list);
|
|
|
|
work->w_syncer = syncer;
|
|
|
|
work->w_data = data;
|
|
|
|
work->w_mount = mp;
|
2009-04-06 18:47:27 +02:00
|
|
|
work->w_completion = completion;
|
2008-10-30 07:06:18 +01:00
|
|
|
spin_lock(&mp->m_sync_lock);
|
|
|
|
list_add_tail(&work->w_list, &mp->m_sync_list);
|
|
|
|
spin_unlock(&mp->m_sync_lock);
|
|
|
|
wake_up_process(mp->m_sync_task);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Flush delayed allocate data, attempting to free up reserved space
|
|
|
|
* from existing allocations. At this point a new allocation attempt
|
|
|
|
* has failed with ENOSPC and we are in the process of scratching our
|
|
|
|
* heads, looking about for more room...
|
|
|
|
*/
|
|
|
|
STATIC void
|
2009-04-06 18:44:54 +02:00
|
|
|
xfs_flush_inodes_work(
|
2008-10-30 07:06:18 +01:00
|
|
|
struct xfs_mount *mp,
|
|
|
|
void *arg)
|
|
|
|
{
|
|
|
|
struct inode *inode = arg;
|
2009-04-06 18:44:54 +02:00
|
|
|
xfs_sync_inodes(mp, SYNC_DELWRI | SYNC_TRYLOCK);
|
|
|
|
xfs_sync_inodes(mp, SYNC_DELWRI | SYNC_TRYLOCK | SYNC_IOWAIT);
|
2008-10-30 07:06:18 +01:00
|
|
|
iput(inode);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
2009-04-06 18:44:54 +02:00
|
|
|
xfs_flush_inodes(
|
2008-10-30 07:06:18 +01:00
|
|
|
xfs_inode_t *ip)
|
|
|
|
{
|
|
|
|
struct inode *inode = VFS_I(ip);
|
2009-04-06 18:47:27 +02:00
|
|
|
DECLARE_COMPLETION_ONSTACK(completion);
|
2008-10-30 07:06:18 +01:00
|
|
|
|
|
|
|
igrab(inode);
|
2009-04-06 18:47:27 +02:00
|
|
|
xfs_syncd_queue_work(ip->i_mount, inode, xfs_flush_inodes_work, &completion);
|
|
|
|
wait_for_completion(&completion);
|
2008-10-30 07:06:18 +01:00
|
|
|
xfs_log_force(ip->i_mount, (xfs_lsn_t)0, XFS_LOG_FORCE|XFS_LOG_SYNC);
|
|
|
|
}
|
|
|
|
|
2008-10-30 07:15:29 +01:00
|
|
|
/*
|
|
|
|
* Every sync period we need to unpin all items, reclaim inodes, sync
|
|
|
|
* quota and write out the superblock. We might need to cover the log
|
|
|
|
* to indicate it is idle.
|
|
|
|
*/
|
2008-10-30 07:06:18 +01:00
|
|
|
STATIC void
|
|
|
|
xfs_sync_worker(
|
|
|
|
struct xfs_mount *mp,
|
|
|
|
void *unused)
|
|
|
|
{
|
|
|
|
int error;
|
|
|
|
|
2008-10-30 07:15:29 +01:00
|
|
|
if (!(mp->m_flags & XFS_MOUNT_RDONLY)) {
|
|
|
|
xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE);
|
2009-06-08 15:35:12 +02:00
|
|
|
xfs_reclaim_inodes(mp, XFS_IFLUSH_DELWRI_ELSE_ASYNC);
|
2008-10-30 07:15:29 +01:00
|
|
|
/* dgc: errors ignored here */
|
2009-06-08 15:33:32 +02:00
|
|
|
error = xfs_qm_sync(mp, SYNC_BDFLUSH);
|
2008-10-30 07:15:29 +01:00
|
|
|
error = xfs_sync_fsdata(mp, SYNC_BDFLUSH);
|
|
|
|
if (xfs_log_need_covered(mp))
|
|
|
|
error = xfs_commit_dummy_trans(mp, XFS_LOG_FORCE);
|
|
|
|
}
|
2008-10-30 07:06:18 +01:00
|
|
|
mp->m_sync_seq++;
|
|
|
|
wake_up(&mp->m_wait_single_sync_task);
|
|
|
|
}
|
|
|
|
|
|
|
|
STATIC int
|
|
|
|
xfssyncd(
|
|
|
|
void *arg)
|
|
|
|
{
|
|
|
|
struct xfs_mount *mp = arg;
|
|
|
|
long timeleft;
|
2009-04-06 18:44:54 +02:00
|
|
|
xfs_sync_work_t *work, *n;
|
2008-10-30 07:06:18 +01:00
|
|
|
LIST_HEAD (tmp);
|
|
|
|
|
|
|
|
set_freezable();
|
|
|
|
timeleft = xfs_syncd_centisecs * msecs_to_jiffies(10);
|
|
|
|
for (;;) {
|
|
|
|
timeleft = schedule_timeout_interruptible(timeleft);
|
|
|
|
/* swsusp */
|
|
|
|
try_to_freeze();
|
|
|
|
if (kthread_should_stop() && list_empty(&mp->m_sync_list))
|
|
|
|
break;
|
|
|
|
|
|
|
|
spin_lock(&mp->m_sync_lock);
|
|
|
|
/*
|
|
|
|
* We can get woken by laptop mode, to do a sync -
|
|
|
|
* that's the (only!) case where the list would be
|
|
|
|
* empty with time remaining.
|
|
|
|
*/
|
|
|
|
if (!timeleft || list_empty(&mp->m_sync_list)) {
|
|
|
|
if (!timeleft)
|
|
|
|
timeleft = xfs_syncd_centisecs *
|
|
|
|
msecs_to_jiffies(10);
|
|
|
|
INIT_LIST_HEAD(&mp->m_sync_work.w_list);
|
|
|
|
list_add_tail(&mp->m_sync_work.w_list,
|
|
|
|
&mp->m_sync_list);
|
|
|
|
}
|
|
|
|
list_for_each_entry_safe(work, n, &mp->m_sync_list, w_list)
|
|
|
|
list_move(&work->w_list, &tmp);
|
|
|
|
spin_unlock(&mp->m_sync_lock);
|
|
|
|
|
|
|
|
list_for_each_entry_safe(work, n, &tmp, w_list) {
|
|
|
|
(*work->w_syncer)(mp, work->w_data);
|
|
|
|
list_del(&work->w_list);
|
|
|
|
if (work == &mp->m_sync_work)
|
|
|
|
continue;
|
2009-04-06 18:47:27 +02:00
|
|
|
if (work->w_completion)
|
|
|
|
complete(work->w_completion);
|
2008-10-30 07:06:18 +01:00
|
|
|
kmem_free(work);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
xfs_syncd_init(
|
|
|
|
struct xfs_mount *mp)
|
|
|
|
{
|
|
|
|
mp->m_sync_work.w_syncer = xfs_sync_worker;
|
|
|
|
mp->m_sync_work.w_mount = mp;
|
2009-04-06 18:47:27 +02:00
|
|
|
mp->m_sync_work.w_completion = NULL;
|
2008-10-30 07:06:18 +01:00
|
|
|
mp->m_sync_task = kthread_run(xfssyncd, mp, "xfssyncd");
|
|
|
|
if (IS_ERR(mp->m_sync_task))
|
|
|
|
return -PTR_ERR(mp->m_sync_task);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
xfs_syncd_stop(
|
|
|
|
struct xfs_mount *mp)
|
|
|
|
{
|
|
|
|
kthread_stop(mp->m_sync_task);
|
|
|
|
}
|
|
|
|
|
2008-10-30 07:37:03 +01:00
|
|
|
int
|
2008-10-30 07:37:15 +01:00
|
|
|
xfs_reclaim_inode(
|
2008-10-30 07:37:03 +01:00
|
|
|
xfs_inode_t *ip,
|
|
|
|
int locked,
|
|
|
|
int sync_mode)
|
|
|
|
{
|
|
|
|
xfs_perag_t *pag = xfs_get_perag(ip->i_mount, ip->i_ino);
|
|
|
|
|
|
|
|
/* The hash lock here protects a thread in xfs_iget_core from
|
|
|
|
* racing with us on linking the inode back with a vnode.
|
|
|
|
* Once we have the XFS_IRECLAIM flag set it will not touch
|
|
|
|
* us.
|
|
|
|
*/
|
|
|
|
write_lock(&pag->pag_ici_lock);
|
|
|
|
spin_lock(&ip->i_flags_lock);
|
|
|
|
if (__xfs_iflags_test(ip, XFS_IRECLAIM) ||
|
|
|
|
!__xfs_iflags_test(ip, XFS_IRECLAIMABLE)) {
|
|
|
|
spin_unlock(&ip->i_flags_lock);
|
|
|
|
write_unlock(&pag->pag_ici_lock);
|
|
|
|
if (locked) {
|
|
|
|
xfs_ifunlock(ip);
|
|
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
|
|
}
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
__xfs_iflags_set(ip, XFS_IRECLAIM);
|
|
|
|
spin_unlock(&ip->i_flags_lock);
|
|
|
|
write_unlock(&pag->pag_ici_lock);
|
|
|
|
xfs_put_perag(ip->i_mount, pag);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If the inode is still dirty, then flush it out. If the inode
|
|
|
|
* is not in the AIL, then it will be OK to flush it delwri as
|
|
|
|
* long as xfs_iflush() does not keep any references to the inode.
|
|
|
|
* We leave that decision up to xfs_iflush() since it has the
|
|
|
|
* knowledge of whether it's OK to simply do a delwri flush of
|
|
|
|
* the inode or whether we need to wait until the inode is
|
|
|
|
* pulled from the AIL.
|
|
|
|
* We get the flush lock regardless, though, just to make sure
|
|
|
|
* we don't free it while it is being flushed.
|
|
|
|
*/
|
|
|
|
if (!locked) {
|
|
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL);
|
|
|
|
xfs_iflock(ip);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* In the case of a forced shutdown we rely on xfs_iflush() to
|
|
|
|
* wait for the inode to be unpinned before returning an error.
|
|
|
|
*/
|
|
|
|
if (!is_bad_inode(VFS_I(ip)) && xfs_iflush(ip, sync_mode) == 0) {
|
|
|
|
/* synchronize with xfs_iflush_done */
|
|
|
|
xfs_iflock(ip);
|
|
|
|
xfs_ifunlock(ip);
|
|
|
|
}
|
|
|
|
|
|
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
|
|
xfs_ireclaim(ip);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2008-10-30 07:37:49 +01:00
|
|
|
/*
|
|
|
|
* We set the inode flag atomically with the radix tree tag.
|
|
|
|
* Once we get tag lookups on the radix tree, this inode flag
|
|
|
|
* can go away.
|
|
|
|
*/
|
2008-10-30 07:37:26 +01:00
|
|
|
void
|
|
|
|
xfs_inode_set_reclaim_tag(
|
|
|
|
xfs_inode_t *ip)
|
|
|
|
{
|
|
|
|
xfs_mount_t *mp = ip->i_mount;
|
|
|
|
xfs_perag_t *pag = xfs_get_perag(mp, ip->i_ino);
|
|
|
|
|
|
|
|
read_lock(&pag->pag_ici_lock);
|
|
|
|
spin_lock(&ip->i_flags_lock);
|
|
|
|
radix_tree_tag_set(&pag->pag_ici_root,
|
|
|
|
XFS_INO_TO_AGINO(mp, ip->i_ino), XFS_ICI_RECLAIM_TAG);
|
2008-10-30 07:37:49 +01:00
|
|
|
__xfs_iflags_set(ip, XFS_IRECLAIMABLE);
|
2008-10-30 07:37:26 +01:00
|
|
|
spin_unlock(&ip->i_flags_lock);
|
|
|
|
read_unlock(&pag->pag_ici_lock);
|
|
|
|
xfs_put_perag(mp, pag);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
__xfs_inode_clear_reclaim_tag(
|
|
|
|
xfs_mount_t *mp,
|
|
|
|
xfs_perag_t *pag,
|
|
|
|
xfs_inode_t *ip)
|
|
|
|
{
|
|
|
|
radix_tree_tag_clear(&pag->pag_ici_root,
|
|
|
|
XFS_INO_TO_AGINO(mp, ip->i_ino), XFS_ICI_RECLAIM_TAG);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
xfs_inode_clear_reclaim_tag(
|
|
|
|
xfs_inode_t *ip)
|
|
|
|
{
|
|
|
|
xfs_mount_t *mp = ip->i_mount;
|
|
|
|
xfs_perag_t *pag = xfs_get_perag(mp, ip->i_ino);
|
|
|
|
|
|
|
|
read_lock(&pag->pag_ici_lock);
|
|
|
|
spin_lock(&ip->i_flags_lock);
|
|
|
|
__xfs_inode_clear_reclaim_tag(mp, pag, ip);
|
|
|
|
spin_unlock(&ip->i_flags_lock);
|
|
|
|
read_unlock(&pag->pag_ici_lock);
|
|
|
|
xfs_put_perag(mp, pag);
|
|
|
|
}
|
|
|
|
|
2008-10-30 07:37:37 +01:00
|
|
|
|
|
|
|
STATIC void
|
|
|
|
xfs_reclaim_inodes_ag(
|
2008-10-30 07:37:03 +01:00
|
|
|
xfs_mount_t *mp,
|
2008-10-30 07:37:37 +01:00
|
|
|
int ag,
|
2008-10-30 07:37:03 +01:00
|
|
|
int mode)
|
|
|
|
{
|
2008-10-30 07:37:37 +01:00
|
|
|
xfs_inode_t *ip = NULL;
|
|
|
|
xfs_perag_t *pag = &mp->m_perag[ag];
|
|
|
|
int nr_found;
|
2008-10-30 07:38:00 +01:00
|
|
|
uint32_t first_index;
|
2008-10-30 07:37:37 +01:00
|
|
|
int skipped;
|
2008-10-30 07:37:03 +01:00
|
|
|
|
|
|
|
restart:
|
2008-10-30 07:37:37 +01:00
|
|
|
first_index = 0;
|
|
|
|
skipped = 0;
|
|
|
|
do {
|
|
|
|
/*
|
|
|
|
* use a gang lookup to find the next inode in the tree
|
|
|
|
* as the tree is sparse and a gang lookup walks to find
|
|
|
|
* the number of objects requested.
|
|
|
|
*/
|
|
|
|
read_lock(&pag->pag_ici_lock);
|
|
|
|
nr_found = radix_tree_gang_lookup_tag(&pag->pag_ici_root,
|
|
|
|
(void**)&ip, first_index, 1,
|
|
|
|
XFS_ICI_RECLAIM_TAG);
|
|
|
|
|
|
|
|
if (!nr_found) {
|
|
|
|
read_unlock(&pag->pag_ici_lock);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2008-10-30 07:38:00 +01:00
|
|
|
/*
|
|
|
|
* Update the index for the next lookup. Catch overflows
|
|
|
|
* into the next AG range which can occur if we have inodes
|
|
|
|
* in the last block of the AG and we are currently
|
|
|
|
* pointing to the last inode.
|
|
|
|
*/
|
2008-10-30 07:37:37 +01:00
|
|
|
first_index = XFS_INO_TO_AGINO(mp, ip->i_ino + 1);
|
2008-10-30 07:38:00 +01:00
|
|
|
if (first_index < XFS_INO_TO_AGINO(mp, ip->i_ino)) {
|
|
|
|
read_unlock(&pag->pag_ici_lock);
|
|
|
|
break;
|
|
|
|
}
|
2008-10-30 07:37:37 +01:00
|
|
|
|
|
|
|
/* ignore if already under reclaim */
|
|
|
|
if (xfs_iflags_test(ip, XFS_IRECLAIM)) {
|
|
|
|
read_unlock(&pag->pag_ici_lock);
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
read_unlock(&pag->pag_ici_lock);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* hmmm - this is an inode already in reclaim. Do
|
|
|
|
* we even bother catching it here?
|
|
|
|
*/
|
2009-06-08 15:35:12 +02:00
|
|
|
if (xfs_reclaim_inode(ip, 0, mode))
|
2008-10-30 07:37:37 +01:00
|
|
|
skipped++;
|
|
|
|
} while (nr_found);
|
|
|
|
|
|
|
|
if (skipped) {
|
|
|
|
delay(1);
|
2008-10-30 07:37:03 +01:00
|
|
|
goto restart;
|
|
|
|
}
|
2008-10-30 07:37:37 +01:00
|
|
|
return;
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
xfs_reclaim_inodes(
|
|
|
|
xfs_mount_t *mp,
|
|
|
|
int mode)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < mp->m_sb.sb_agcount; i++) {
|
|
|
|
if (!mp->m_perag[i].pag_ici_init)
|
|
|
|
continue;
|
2009-06-08 15:35:12 +02:00
|
|
|
xfs_reclaim_inodes_ag(mp, i, mode);
|
2008-10-30 07:37:37 +01:00
|
|
|
}
|
2008-10-30 07:37:03 +01:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|