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[XFS] fix, speedup and simplify atime handling let the VFS handle atime

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updates and only sync back to the xfs inode when nessecary

SGI-PV: 946679
SGI-Modid: xfs-linux-melb:xfs-kern:203362a

Signed-off-by: Christoph Hellwig <hch@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>
This commit is contained in:
Christoph Hellwig 2006-01-11 15:35:17 +11:00 committed by Nathan Scott
parent dd954c69d1
commit 42fe2b1f7f
8 changed files with 49 additions and 54 deletions
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58
fs/xfs/linux-2.6/xfs_iops.c
View File

@ -57,6 +57,24 @@
#define IS_NOATIME(inode) ((inode->i_sb->s_flags & MS_NOATIME) || \
(S_ISDIR(inode->i_mode) && inode->i_sb->s_flags & MS_NODIRATIME))
/*
* Bring the atime in the XFS inode uptodate.
* Used before logging the inode to disk or when the Linux inode goes away.
*/
void
xfs_synchronize_atime(
xfs_inode_t *ip)
{
vnode_t *vp;
vp = XFS_ITOV_NULL(ip);
if (vp) {
struct inode *inode = &vp->v_inode;
ip->i_d.di_atime.t_sec = (__int32_t)inode->i_atime.tv_sec;
ip->i_d.di_atime.t_nsec = (__int32_t)inode->i_atime.tv_nsec;
}
}
/*
* Change the requested timestamp in the given inode.
* We don't lock across timestamp updates, and we don't log them but
@ -76,23 +94,6 @@ xfs_ichgtime(
struct inode *inode = LINVFS_GET_IP(XFS_ITOV(ip));
timespec_t tv;
/*
* We're not supposed to change timestamps in readonly-mounted
* filesystems. Throw it away if anyone asks us.
*/
if (unlikely(IS_RDONLY(inode)))
return;
/*
* Don't update access timestamps on reads if mounted "noatime".
* Throw it away if anyone asks us.
*/
if (unlikely(
(ip->i_mount->m_flags & XFS_MOUNT_NOATIME || IS_NOATIME(inode)) &&
(flags & (XFS_ICHGTIME_ACC|XFS_ICHGTIME_MOD|XFS_ICHGTIME_CHG)) ==
XFS_ICHGTIME_ACC))
return;
nanotime(&tv);
if (flags & XFS_ICHGTIME_MOD) {
inode->i_mtime = tv;
@ -129,8 +130,6 @@ xfs_ichgtime(
* Variant on the above which avoids querying the system clock
* in situations where we know the Linux inode timestamps have
* just been updated (and so we can update our inode cheaply).
* We also skip the readonly and noatime checks here, they are
* also catered for already.
*/
void
xfs_ichgtime_fast(
@ -140,6 +139,12 @@ xfs_ichgtime_fast(
{
timespec_t *tvp;
/*
* Atime updates for read() & friends are handled lazily now, and
* explicit updates must go through xfs_ichgtime()
*/
ASSERT((flags & XFS_ICHGTIME_ACC) == 0);
/*
* We're not supposed to change timestamps in readonly-mounted
* filesystems. Throw it away if anyone asks us.
@ -147,26 +152,11 @@ xfs_ichgtime_fast(
if (unlikely(IS_RDONLY(inode)))
return;
/*
* Don't update access timestamps on reads if mounted "noatime".
* Throw it away if anyone asks us.
*/
if (unlikely(
(ip->i_mount->m_flags & XFS_MOUNT_NOATIME || IS_NOATIME(inode)) &&
((flags & (XFS_ICHGTIME_ACC|XFS_ICHGTIME_MOD|XFS_ICHGTIME_CHG)) ==
XFS_ICHGTIME_ACC)))
return;
if (flags & XFS_ICHGTIME_MOD) {
tvp = &inode->i_mtime;
ip->i_d.di_mtime.t_sec = (__int32_t)tvp->tv_sec;
ip->i_d.di_mtime.t_nsec = (__int32_t)tvp->tv_nsec;
}
if (flags & XFS_ICHGTIME_ACC) {
tvp = &inode->i_atime;
ip->i_d.di_atime.t_sec = (__int32_t)tvp->tv_sec;
ip->i_d.di_atime.t_nsec = (__int32_t)tvp->tv_nsec;
}
if (flags & XFS_ICHGTIME_CHG) {
tvp = &inode->i_ctime;
ip->i_d.di_ctime.t_sec = (__int32_t)tvp->tv_sec;

6
fs/xfs/linux-2.6/xfs_lrw.c
View File

@ -281,9 +281,6 @@ xfs_read(
xfs_iunlock(ip, XFS_IOLOCK_SHARED);
if (likely(!(ioflags & IO_INVIS)))
xfs_ichgtime_fast(ip, inode, XFS_ICHGTIME_ACC);
unlock_isem:
if (unlikely(ioflags & IO_ISDIRECT))
mutex_unlock(&inode->i_mutex);
@ -346,9 +343,6 @@ xfs_sendfile(
if (ret > 0)
XFS_STATS_ADD(xs_read_bytes, ret);
if (likely(!(ioflags & IO_INVIS)))
xfs_ichgtime_fast(ip, LINVFS_GET_IP(vp), XFS_ICHGTIME_ACC);
return ret;
}

1
fs/xfs/linux-2.6/xfs_vnode.c
View File

@ -106,7 +106,6 @@ vn_revalidate_core(
inode->i_blocks = vap->va_nblocks;
inode->i_mtime = vap->va_mtime;
inode->i_ctime = vap->va_ctime;
inode->i_atime = vap->va_atime;
inode->i_blksize = vap->va_blocksize;
if (vap->va_xflags & XFS_XFLAG_IMMUTABLE)
inode->i_flags |= S_IMMUTABLE;

5
fs/xfs/xfs_inode.c
View File

@ -3364,6 +3364,11 @@ xfs_iflush_int(
ip->i_update_core = 0;
SYNCHRONIZE();
/*
* Make sure to get the latest atime from the Linux inode.
*/
xfs_synchronize_atime(ip);
if (XFS_TEST_ERROR(INT_GET(dip->di_core.di_magic,ARCH_CONVERT) != XFS_DINODE_MAGIC,
mp, XFS_ERRTAG_IFLUSH_1, XFS_RANDOM_IFLUSH_1)) {
xfs_cmn_err(XFS_PTAG_IFLUSH, CE_ALERT, mp,

2
fs/xfs/xfs_inode.h
View File

@ -436,6 +436,8 @@ void xfs_ichgtime(xfs_inode_t *, int);
xfs_fsize_t xfs_file_last_byte(xfs_inode_t *);
void xfs_lock_inodes(xfs_inode_t **, int, int, uint);
void xfs_synchronize_atime(xfs_inode_t *);
#define xfs_ipincount(ip) ((unsigned int) atomic_read(&ip->i_pincount))
#ifdef DEBUG

5
fs/xfs/xfs_inode_item.c
View File

@ -271,6 +271,11 @@ xfs_inode_item_format(
if (ip->i_update_size)
ip->i_update_size = 0;
/*
* Make sure to get the latest atime from the Linux inode.
*/
xfs_synchronize_atime(ip);
vecp->i_addr = (xfs_caddr_t)&ip->i_d;
vecp->i_len = sizeof(xfs_dinode_core_t);
XLOG_VEC_SET_TYPE(vecp, XLOG_REG_TYPE_ICORE);

7
fs/xfs/xfs_itable.c
View File

@ -56,6 +56,7 @@ xfs_bulkstat_one_iget(
{
xfs_dinode_core_t *dic; /* dinode core info pointer */
xfs_inode_t *ip; /* incore inode pointer */
vnode_t *vp;
int error;
error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, bno);
@ -72,6 +73,7 @@ xfs_bulkstat_one_iget(
goto out_iput;
}
vp = XFS_ITOV(ip);
dic = &ip->i_d;
/* xfs_iget returns the following without needing
@ -84,8 +86,9 @@ xfs_bulkstat_one_iget(
buf->bs_uid = dic->di_uid;
buf->bs_gid = dic->di_gid;
buf->bs_size = dic->di_size;
buf->bs_atime.tv_sec = dic->di_atime.t_sec;
buf->bs_atime.tv_nsec = dic->di_atime.t_nsec;
/* atime is only kept uptodate in the Linux inode */
buf->bs_atime.tv_sec = vp->v_inode.i_atime.tv_sec;
buf->bs_atime.tv_nsec = vp->v_inode.i_atime.tv_nsec;
buf->bs_mtime.tv_sec = dic->di_mtime.t_sec;
buf->bs_mtime.tv_nsec = dic->di_mtime.t_nsec;
buf->bs_ctime.tv_sec = dic->di_ctime.t_sec;

19
fs/xfs/xfs_vnodeops.c
View File

@ -182,8 +182,8 @@ xfs_getattr(
break;
}
vap->va_atime.tv_sec = ip->i_d.di_atime.t_sec;
vap->va_atime.tv_nsec = ip->i_d.di_atime.t_nsec;
/* atime is only kept uptodate in the Linux inode */
vap->va_atime = vp->v_inode.i_atime;
vap->va_mtime.tv_sec = ip->i_d.di_mtime.t_sec;
vap->va_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec;
vap->va_ctime.tv_sec = ip->i_d.di_ctime.t_sec;
@ -982,10 +982,6 @@ xfs_readlink(
goto error_return;
}
if (!(ioflags & IO_INVIS)) {
xfs_ichgtime(ip, XFS_ICHGTIME_ACC);
}
/*
* See if the symlink is stored inline.
*/
@ -3226,7 +3222,6 @@ xfs_readdir(
xfs_trans_t *tp = NULL;
int error = 0;
uint lock_mode;
xfs_off_t start_offset;
vn_trace_entry(BHV_TO_VNODE(dir_bdp), __FUNCTION__,
(inst_t *)__return_address);
@ -3237,11 +3232,7 @@ xfs_readdir(
}
lock_mode = xfs_ilock_map_shared(dp);
start_offset = uiop->uio_offset;
error = XFS_DIR_GETDENTS(dp->i_mount, tp, dp, uiop, eofp);
if (start_offset != uiop->uio_offset) {
xfs_ichgtime(dp, XFS_ICHGTIME_ACC);
}
xfs_iunlock_map_shared(dp, lock_mode);
return error;
}
@ -3819,6 +3810,12 @@ xfs_reclaim(
ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0);
/*
* Make sure the atime in the XFS inode is correct before freeing the
* Linux inode.
*/
xfs_synchronize_atime(ip);
/* If we have nothing to flush with this inode then complete the
* teardown now, otherwise break the link between the xfs inode
* and the linux inode and clean up the xfs inode later. This