From: Steven Whitehouse Date: Sat, 21 May 2011 13:05:58 +0000 (+0100) Subject: GFS2: Wipe directory hash table metadata when deallocating a directory X-Git-Tag: upstream/snapshot3+hdmi~10362^2~1 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6d3117b41295150d4ac70622055dd8f5529d86b2;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git 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 --- diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c index 74add2d..e65493a 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 7273ad3..9b780df 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); } /**