From 42fe2b1f7fe788ed5304a7bfa0a0b0db81bc03a8 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Wed, 11 Jan 2006 15:35:17 +1100 Subject: [PATCH] [XFS] fix, speedup and simplify atime handling let the VFS handle atime 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 Signed-off-by: Nathan Scott --- fs/xfs/linux-2.6/xfs_iops.c | 58 +++++++++++++++--------------------- fs/xfs/linux-2.6/xfs_lrw.c | 6 ---- fs/xfs/linux-2.6/xfs_vnode.c | 1 - fs/xfs/xfs_inode.c | 5 ++++ fs/xfs/xfs_inode.h | 2 ++ fs/xfs/xfs_inode_item.c | 5 ++++ fs/xfs/xfs_itable.c | 7 +++-- fs/xfs/xfs_vnodeops.c | 19 +++++------- 8 files changed, 49 insertions(+), 54 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_iops.c b/fs/xfs/linux-2.6/xfs_iops.c index 97fb1470cf..8fd274fc26 100644 --- a/fs/xfs/linux-2.6/xfs_iops.c +++ b/fs/xfs/linux-2.6/xfs_iops.c @@ -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( @@ -141,20 +140,16 @@ xfs_ichgtime_fast( timespec_t *tvp; /* - * We're not supposed to change timestamps in readonly-mounted - * filesystems. Throw it away if anyone asks us. + * Atime updates for read() & friends are handled lazily now, and + * explicit updates must go through xfs_ichgtime() */ - if (unlikely(IS_RDONLY(inode))) - return; + ASSERT((flags & XFS_ICHGTIME_ACC) == 0); /* - * Don't update access timestamps on reads if mounted "noatime". - * Throw it away if anyone asks us. + * We're not supposed to change timestamps in readonly-mounted + * filesystems. 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))) + if (unlikely(IS_RDONLY(inode))) return; if (flags & XFS_ICHGTIME_MOD) { @@ -162,11 +157,6 @@ xfs_ichgtime_fast( 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; diff --git a/fs/xfs/linux-2.6/xfs_lrw.c b/fs/xfs/linux-2.6/xfs_lrw.c index c73d3c1888..563cb9e975 100644 --- a/fs/xfs/linux-2.6/xfs_lrw.c +++ b/fs/xfs/linux-2.6/xfs_lrw.c @@ -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; } diff --git a/fs/xfs/linux-2.6/xfs_vnode.c b/fs/xfs/linux-2.6/xfs_vnode.c index e9bbcb4d62..260dd8415d 100644 --- a/fs/xfs/linux-2.6/xfs_vnode.c +++ b/fs/xfs/linux-2.6/xfs_vnode.c @@ -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; diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index 0063437f29..6b7ac8bdca 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -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, diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h index 124d30e614..c4c1d9bce8 100644 --- a/fs/xfs/xfs_inode.h +++ b/fs/xfs/xfs_inode.h @@ -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 diff --git a/fs/xfs/xfs_inode_item.c b/fs/xfs/xfs_inode_item.c index 7f3363c621..9369010f3f 100644 --- a/fs/xfs/xfs_inode_item.c +++ b/fs/xfs/xfs_inode_item.c @@ -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); diff --git a/fs/xfs/xfs_itable.c b/fs/xfs/xfs_itable.c index f63646ead8..41f50e7d1c 100644 --- a/fs/xfs/xfs_itable.c +++ b/fs/xfs/xfs_itable.c @@ -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; diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c index 15734c5495..688fc2cb4b 100644 --- a/fs/xfs/xfs_vnodeops.c +++ b/fs/xfs/xfs_vnodeops.c @@ -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 -- 2.39.2