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xfs: implement the lazytime mount option

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Use the VFS dirty inode tracking for lazytime inodes only, and just
log them in ->dirty_inode.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Christoph Hellwig 2018-03-06 17:04:00 -08:00 committed by Darrick J. Wong
parent 0d07e5573f
commit c3b1b13190
3 changed files with 49 additions and 1 deletions
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13
fs/xfs/xfs_iops.c
View File

@ -46,6 +46,7 @@
#include <linux/security.h>
#include <linux/iomap.h>
#include <linux/slab.h>
#include <linux/iversion.h>
/*
* Directories have different lock order w.r.t. mmap_sem compared to regular
@ -1052,11 +1053,21 @@ xfs_vn_update_time(
{
struct xfs_inode *ip = XFS_I(inode);
struct xfs_mount *mp = ip->i_mount;
int log_flags = XFS_ILOG_TIMESTAMP;
struct xfs_trans *tp;
int error;
trace_xfs_update_time(ip);
if (inode->i_sb->s_flags & SB_LAZYTIME) {
if (!((flags & S_VERSION) &&
inode_maybe_inc_iversion(inode, false)))
return generic_update_time(inode, now, flags);
/* Capture the iversion update that just occurred */
log_flags |= XFS_ILOG_CORE;
}
error = xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp);
if (error)
return error;
@ -1070,7 +1081,7 @@ xfs_vn_update_time(
inode->i_atime = *now;
xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP);
xfs_trans_log_inode(tp, ip, log_flags);
return xfs_trans_commit(tp);
}

23
fs/xfs/xfs_super.c
View File

@ -1009,6 +1009,28 @@ xfs_fs_destroy_inode(
xfs_inode_set_reclaim_tag(ip);
}
static void
xfs_fs_dirty_inode(
struct inode *inode,
int flag)
{
struct xfs_inode *ip = XFS_I(inode);
struct xfs_mount *mp = ip->i_mount;
struct xfs_trans *tp;
if (!(inode->i_sb->s_flags & SB_LAZYTIME))
return;
if (flag != I_DIRTY_SYNC || !(inode->i_state & I_DIRTY_TIME))
return;
if (xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp))
return;
xfs_ilock(ip, XFS_ILOCK_EXCL);
xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP);
xfs_trans_commit(tp);
}
/*
* Slab object creation initialisation for the XFS inode.
* This covers only the idempotent fields in the XFS inode;
@ -1789,6 +1811,7 @@ xfs_fs_free_cached_objects(
static const struct super_operations xfs_super_operations = {
.alloc_inode = xfs_fs_alloc_inode,
.destroy_inode = xfs_fs_destroy_inode,
.dirty_inode = xfs_fs_dirty_inode,
.drop_inode = xfs_fs_drop_inode,
.put_super = xfs_fs_put_super,
.sync_fs = xfs_fs_sync_fs,

14
fs/xfs/xfs_trans_inode.c
View File

@ -98,9 +98,23 @@ xfs_trans_log_inode(
xfs_inode_t *ip,
uint flags)
{
struct inode *inode = VFS_I(ip);
ASSERT(ip->i_itemp != NULL);
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
/*
* Don't bother with i_lock for the I_DIRTY_TIME check here, as races
* don't matter - we either will need an extra transaction in 24 hours
* to log the timestamps, or will clear already cleared fields in the
* worst case.
*/
if (inode->i_state & (I_DIRTY_TIME | I_DIRTY_TIME_EXPIRED)) {
spin_lock(&inode->i_lock);
inode->i_state &= ~(I_DIRTY_TIME | I_DIRTY_TIME_EXPIRED);
spin_unlock(&inode->i_lock);
}
/*
* Record the specific change for fdatasync optimisation. This
* allows fdatasync to skip log forces for inodes that are only