From 1ac74e01df959e3e91baded7c83399372af945a2 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 22 Apr 2008 17:34:12 +1000 Subject: [XFS] kill usesless IHOLD calls in xfs_rename Similar to to the previous patch for remove and rmdir only grab a reference to inodes when we join them to transaction to balance the decrement on transaction completion. Everything else it taken care of by the VFS. Note that the old case had leaks of inode count when src == target or src or target == one of the parent inodes, but these cases are fortunately already rejected by the VFS. SGI-PV: 976035 SGI-Modid: xfs-linux-melb:xfs-kern:30904a Signed-off-by: Christoph Hellwig Signed-off-by: Lachlan McIlroy --- fs/xfs/xfs_rename.c | 75 +++++++---------------------------------------------- 1 file changed, 10 insertions(+), 65 deletions(-) (limited to 'fs/xfs') diff --git a/fs/xfs/xfs_rename.c b/fs/xfs/xfs_rename.c index 6a141427f68..d8063e1ad29 100644 --- a/fs/xfs/xfs_rename.c +++ b/fs/xfs/xfs_rename.c @@ -137,9 +137,7 @@ xfs_rename( int cancel_flags; int committed; xfs_inode_t *inodes[4]; - int target_ip_dropped = 0; /* dropped target_ip link? */ int spaceres; - int target_link_zero = 0; int num_inodes; xfs_itrace_entry(src_dp); @@ -174,10 +172,6 @@ xfs_rename( xfs_sort_for_rename(src_dp, target_dp, src_ip, target_ip, inodes, &num_inodes); - IHOLD(src_ip); - if (target_ip) - IHOLD(target_ip); - XFS_BMAP_INIT(&free_list, &first_block); tp = xfs_trans_alloc(mp, XFS_TRANS_RENAME); cancel_flags = XFS_TRANS_RELEASE_LOG_RES; @@ -191,7 +185,7 @@ xfs_rename( } if (error) { xfs_trans_cancel(tp, 0); - goto rele_return; + goto std_return; } /* @@ -199,7 +193,7 @@ xfs_rename( */ if ((error = XFS_QM_DQVOPRENAME(mp, inodes))) { xfs_trans_cancel(tp, cancel_flags); - goto rele_return; + goto std_return; } /* @@ -220,7 +214,7 @@ xfs_rename( error = XFS_ERROR(EXDEV); xfs_rename_unlock4(inodes, XFS_ILOCK_SHARED); xfs_trans_cancel(tp, cancel_flags); - goto rele_return; + goto std_return; } /* @@ -233,17 +227,17 @@ xfs_rename( */ IHOLD(src_dp); xfs_trans_ijoin(tp, src_dp, XFS_ILOCK_EXCL); + if (new_parent) { IHOLD(target_dp); xfs_trans_ijoin(tp, target_dp, XFS_ILOCK_EXCL); } - if ((src_ip != src_dp) && (src_ip != target_dp)) { - xfs_trans_ijoin(tp, src_ip, XFS_ILOCK_EXCL); - } - if ((target_ip != NULL) && - (target_ip != src_ip) && - (target_ip != src_dp) && - (target_ip != target_dp)) { + + IHOLD(src_ip); + xfs_trans_ijoin(tp, src_ip, XFS_ILOCK_EXCL); + + if (target_ip) { + IHOLD(target_ip); xfs_trans_ijoin(tp, target_ip, XFS_ILOCK_EXCL); } @@ -317,7 +311,6 @@ xfs_rename( error = xfs_droplink(tp, target_ip); if (error) goto abort_return; - target_ip_dropped = 1; if (src_is_directory) { /* @@ -327,10 +320,6 @@ xfs_rename( if (error) goto abort_return; } - - /* Do this test while we still hold the locks */ - target_link_zero = (target_ip)->i_d.di_nlink==0; - } /* target_ip != NULL */ /* @@ -396,15 +385,6 @@ xfs_rename( xfs_trans_log_inode(tp, target_dp, XFS_ILOG_CORE); } - /* - * If there was a target inode, take an extra reference on - * it here so that it doesn't go to xfs_inactive() from - * within the commit. - */ - if (target_ip != NULL) { - IHOLD(target_ip); - } - /* * If this is a synchronous mount, make sure that the * rename transaction goes to disk before returning to @@ -414,30 +394,11 @@ xfs_rename( xfs_trans_set_sync(tp); } - /* - * Take refs. for vop_link_removed calls below. No need to worry - * about directory refs. because the caller holds them. - * - * Do holds before the xfs_bmap_finish since it might rele them down - * to zero. - */ - - if (target_ip_dropped) - IHOLD(target_ip); - IHOLD(src_ip); - error = xfs_bmap_finish(&tp, &free_list, &committed); if (error) { xfs_bmap_cancel(&free_list); xfs_trans_cancel(tp, (XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT)); - if (target_ip != NULL) { - IRELE(target_ip); - } - if (target_ip_dropped) { - IRELE(target_ip); - } - IRELE(src_ip); goto std_return; } @@ -446,15 +407,6 @@ xfs_rename( * the vnode references. */ error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); - if (target_ip != NULL) - IRELE(target_ip); - /* - * Let interposed file systems know about removed links. - */ - if (target_ip_dropped) - IRELE(target_ip); - - IRELE(src_ip); /* Fall through to std_return with error = 0 or errno from * xfs_trans_commit */ @@ -476,11 +428,4 @@ std_return: xfs_bmap_cancel(&free_list); xfs_trans_cancel(tp, cancel_flags); goto std_return; - - rele_return: - IRELE(src_ip); - if (target_ip != NULL) { - IRELE(target_ip); - } - goto std_return; } -- cgit v1.2.3-18-g5258