diff options
| author | Andreas Gruenbacher <agruenba@redhat.com> | 2022-11-02 17:06:58 +0100 |
|---|---|---|
| committer | Andreas Gruenbacher <agruenba@redhat.com> | 2022-12-02 15:58:00 +0100 |
| commit | 38552ff676f072e7d15c5e0a877fda613e57ed2d (patch) | |
| tree | 3bf3437ad5d143178b2348dbbabdc0cd6f3f486c /fs/gfs2/xattr.c | |
| parent | 3d0258bc11185ccb21f922332eca731e1928c5a4 (diff) | |
gfs2: Fix and clean up create / evict interaction
When gfs2_create_inode() fails after creating a new inode, it uses the
GIF_FREE_VFS_INODE and GIF_ALLOC_FAILED inode flags to communicate to
gfs2_evict_inode() which parts of the inode need to be deallocated and
destroyed. In some error cases, the inode ends up being allocated on
disk and then accidentally left behind. In others, the inode is
partially constructed and then not properly destroyed. Clean this up by
completely handling the inode deallocation and destruction in
gfs2_evict_inode().
This means that gfs2_evict_inode() may now be faced with partially
constructed inodes, so add the necessary checks to cope with that. In
particular, make sure that for incompletely constructed inodes, we're
not accessing the buffers backing the on-disk blocks; the contents may
be undefined.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Diffstat (limited to 'fs/gfs2/xattr.c')
| -rw-r--r-- | fs/gfs2/xattr.c | 26 |
1 files changed, 15 insertions, 11 deletions
diff --git a/fs/gfs2/xattr.c b/fs/gfs2/xattr.c index f6a66050380e..518c0677e12a 100644 --- a/fs/gfs2/xattr.c +++ b/fs/gfs2/xattr.c @@ -1412,11 +1412,13 @@ static int ea_dealloc_block(struct gfs2_inode *ip) ip->i_eattr = 0; gfs2_add_inode_blocks(&ip->i_inode, -1); - error = gfs2_meta_inode_buffer(ip, &dibh); - if (!error) { - gfs2_trans_add_meta(ip->i_gl, dibh); - gfs2_dinode_out(ip, dibh->b_data); - brelse(dibh); + if (likely(!test_bit(GIF_ALLOC_FAILED, &ip->i_flags))) { + error = gfs2_meta_inode_buffer(ip, &dibh); + if (!error) { + gfs2_trans_add_meta(ip->i_gl, dibh); + gfs2_dinode_out(ip, dibh->b_data); + brelse(dibh); + } } gfs2_trans_end(sdp); @@ -1445,14 +1447,16 @@ int gfs2_ea_dealloc(struct gfs2_inode *ip) if (error) return error; - error = ea_foreach(ip, ea_dealloc_unstuffed, NULL); - if (error) - goto out_quota; - - if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) { - error = ea_dealloc_indirect(ip); + if (likely(!test_bit(GIF_ALLOC_FAILED, &ip->i_flags))) { + error = ea_foreach(ip, ea_dealloc_unstuffed, NULL); if (error) goto out_quota; + + if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) { + error = ea_dealloc_indirect(ip); + if (error) + goto out_quota; + } } error = ea_dealloc_block(ip); |