From 5df78e73d328e870a1cd8a9e0f39bf094e42ce9d Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 22 Apr 2008 17:34:24 +1000 Subject: [XFS] kill usesless IHOLD calls in xfs_remove and xfs_rmdir The VFS always has an inode reference when we call these functions. So we only need to grab a signle reference to each inode that's joined to a transaction - all the other bumping and dropping is as useless as the comments describing the IRIX semantics. SGI-PV: 976035 SGI-Modid: xfs-linux-melb:xfs-kern:30912a Signed-off-by: Christoph Hellwig Signed-off-by: Lachlan McIlroy --- fs/xfs/xfs_vnodeops.c | 63 ++++----------------------------------------------- 1 file changed, 4 insertions(+), 59 deletions(-) (limited to 'fs/xfs') diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c index 2ebfc60097d1..70702a60b4bb 100644 --- a/fs/xfs/xfs_vnodeops.c +++ b/fs/xfs/xfs_vnodeops.c @@ -2162,20 +2162,6 @@ xfs_remove( return error; } - /* - * We need to get a reference to ip before we get our log - * reservation. The reason for this is that we cannot call - * xfs_iget for an inode for which we do not have a reference - * once we've acquired a log reservation. This is because the - * inode we are trying to get might be in xfs_inactive going - * for a log reservation. Since we'll have to wait for the - * inactive code to complete before returning from xfs_iget, - * we need to make sure that we don't have log space reserved - * when we call xfs_iget. Instead we get an unlocked reference - * to the inode before getting our log reservation. - */ - IHOLD(ip); - xfs_itrace_entry(ip); xfs_itrace_ref(ip); @@ -2184,7 +2170,6 @@ xfs_remove( error = XFS_QM_DQATTACH(mp, ip, 0); if (error) { REMOVE_DEBUG_TRACE(__LINE__); - IRELE(ip); goto std_return; } @@ -2211,7 +2196,6 @@ xfs_remove( ASSERT(error != ENOSPC); REMOVE_DEBUG_TRACE(__LINE__); xfs_trans_cancel(tp, 0); - IRELE(ip); return error; } @@ -2219,7 +2203,6 @@ xfs_remove( if (error) { REMOVE_DEBUG_TRACE(__LINE__); xfs_trans_cancel(tp, cancel_flags); - IRELE(ip); goto std_return; } @@ -2227,6 +2210,7 @@ xfs_remove( * At this point, we've gotten both the directory and the entry * inodes locked. */ + IHOLD(ip); xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); IHOLD(dp); @@ -2259,12 +2243,6 @@ xfs_remove( */ link_zero = (ip)->i_d.di_nlink==0; - /* - * Take an extra ref on the inode so that it doesn't - * go to xfs_inactive() from within the commit. - */ - IHOLD(ip); - /* * If this is a synchronous mount, make sure that the * remove transaction goes to disk before returning to @@ -2281,10 +2259,8 @@ xfs_remove( } error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); - if (error) { - IRELE(ip); + if (error) goto std_return; - } /* * If we are using filestreams, kill the stream association. @@ -2296,7 +2272,6 @@ xfs_remove( xfs_filestream_deassociate(ip); xfs_itrace_exit(ip); - IRELE(ip); /* Fall through to std_return with error = 0 */ std_return: @@ -2325,8 +2300,6 @@ xfs_remove( cancel_flags |= XFS_TRANS_ABORT; xfs_trans_cancel(tp, cancel_flags); - IRELE(ip); - goto std_return; } @@ -2698,7 +2671,6 @@ xfs_rmdir( struct xfs_name *name, xfs_inode_t *cdp) { - bhv_vnode_t *dir_vp = XFS_ITOV(dp); xfs_mount_t *mp = dp->i_mount; xfs_trans_t *tp; int error; @@ -2723,20 +2695,6 @@ xfs_rmdir( return XFS_ERROR(error); } - /* - * We need to get a reference to cdp before we get our log - * reservation. The reason for this is that we cannot call - * xfs_iget for an inode for which we do not have a reference - * once we've acquired a log reservation. This is because the - * inode we are trying to get might be in xfs_inactive going - * for a log reservation. Since we'll have to wait for the - * inactive code to complete before returning from xfs_iget, - * we need to make sure that we don't have log space reserved - * when we call xfs_iget. Instead we get an unlocked reference - * to the inode before getting our log reservation. - */ - IHOLD(cdp); - /* * Get the dquots for the inodes. */ @@ -2744,7 +2702,6 @@ xfs_rmdir( if (!error) error = XFS_QM_DQATTACH(mp, cdp, 0); if (error) { - IRELE(cdp); REMOVE_DEBUG_TRACE(__LINE__); goto std_return; } @@ -2771,7 +2728,6 @@ xfs_rmdir( if (error) { ASSERT(error != ENOSPC); cancel_flags = 0; - IRELE(cdp); goto error_return; } XFS_BMAP_INIT(&free_list, &first_block); @@ -2785,14 +2741,13 @@ xfs_rmdir( error = xfs_lock_dir_and_entry(dp, cdp); if (error) { xfs_trans_cancel(tp, cancel_flags); - IRELE(cdp); goto std_return; } + IHOLD(dp); xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); - VN_HOLD(dir_vp); - xfs_itrace_ref(cdp); + IHOLD(cdp); xfs_trans_ijoin(tp, cdp, XFS_ILOCK_EXCL); ASSERT(cdp->i_d.di_nlink >= 2); @@ -2845,12 +2800,6 @@ xfs_rmdir( /* Determine these before committing transaction */ last_cdp_link = (cdp)->i_d.di_nlink==0; - /* - * Take an extra ref on the child vnode so that it - * does not go to xfs_inactive() from within the commit. - */ - IHOLD(cdp); - /* * If this is a synchronous mount, make sure that the * rmdir transaction goes to disk before returning to @@ -2865,19 +2814,15 @@ xfs_rmdir( xfs_bmap_cancel(&free_list); xfs_trans_cancel(tp, (XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT)); - IRELE(cdp); goto std_return; } error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); if (error) { - IRELE(cdp); goto std_return; } - IRELE(cdp); - /* Fall through to std_return with error = 0 or the errno * from xfs_trans_commit. */ std_return: -- cgit v1.2.3