From 6d3117b41295150d4ac70622055dd8f5529d86b2 Mon Sep 17 00:00:00 2001 From: Steven Whitehouse Date: Sat, 21 May 2011 14:05:58 +0100 Subject: GFS2: Wipe directory hash table metadata when deallocating a directory The deallocation code for directories in GFS2 is largely divided into two parts. The first part deallocates any directory leaf blocks and marks the directory as being a regular file when that is complete. The second stage was identical to deallocating regular files. Regular files have their data blocks in a different address space to directories, and thus what would have been normal data blocks in a regular file (the hash table in a GFS2 directory) were deallocated correctly. However, a reference to these blocks was left in the journal (assuming of course that some previous activity had resulted in those blocks being in the journal or ail list). This patch uses the i_depth as a test of whether the inode is an exhash directory (we cannot test the inode type as that has already been changed to a regular file at this stage in deallocation) The original issue was reported by Chris Hertel as an issue he encountered running bonnie++ Reported-by: Christopher R. Hertel Cc: Abhijith Das Signed-off-by: Steven Whitehouse --- fs/gfs2/bmap.c | 2 ++ fs/gfs2/rgrp.c | 4 ++++ 2 files changed, 6 insertions(+) (limited to 'fs/gfs2') diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c index 74add2ddcc3f..e65493a8ac00 100644 --- a/fs/gfs2/bmap.c +++ b/fs/gfs2/bmap.c @@ -780,6 +780,8 @@ static int do_strip(struct gfs2_inode *ip, struct buffer_head *dibh, metadata = (height != ip->i_height - 1); if (metadata) revokes = (height) ? sdp->sd_inptrs : sdp->sd_diptrs; + else if (ip->i_depth) + revokes = sdp->sd_inptrs; if (ip != GFS2_I(sdp->sd_rindex)) error = gfs2_rindex_hold(sdp, &ip->i_alloc->al_ri_gh); diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c index 7273ad3c85ba..9b780df3fd54 100644 --- a/fs/gfs2/rgrp.c +++ b/fs/gfs2/rgrp.c @@ -1629,6 +1629,10 @@ void __gfs2_free_data(struct gfs2_inode *ip, u64 bstart, u32 blen) gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data); gfs2_trans_add_rg(rgd); + + /* Directories keep their data in the metadata address space */ + if (ip->i_depth) + gfs2_meta_wipe(ip, bstart, blen); } /** -- cgit v1.2.3