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authorJoel Becker <joel.becker@oracle.com>2008-11-14 01:49:12 +0300
committerMark Fasheh <mfasheh@suse.com>2009-01-05 19:36:52 +0300
commit10995aa2451afa20b721cc7de856cae1a13dba57 (patch)
tree63129e7d752fb018dc76aa42de136baa4a8a4232 /fs/ocfs2/resize.c
parentb657c95c11088d77fc1bfc9c84d940f778bf9d12 (diff)
downloadlinux-10995aa2451afa20b721cc7de856cae1a13dba57.tar.xz
ocfs2: Morph the haphazard OCFS2_IS_VALID_DINODE() checks.
Random places in the code would check a dinode bh to see if it was valid. Not only did they do different levels of validation, they handled errors in different ways. The previous commit unified inode block reads, validating all block reads in the same place. Thus, these haphazard checks are no longer necessary. Rather than eliminate them, however, we change them to BUG_ON() checks. This ensures the assumptions remain true. All of the code paths to these checks have been audited to ensure they come from a validated inode read. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Diffstat (limited to 'fs/ocfs2/resize.c')
-rw-r--r--fs/ocfs2/resize.c10
1 files changed, 4 insertions, 6 deletions
diff --git a/fs/ocfs2/resize.c b/fs/ocfs2/resize.c
index ffd48db229a7..739d452f6174 100644
--- a/fs/ocfs2/resize.c
+++ b/fs/ocfs2/resize.c
@@ -314,6 +314,10 @@ int ocfs2_group_extend(struct inode * inode, int new_clusters)
fe = (struct ocfs2_dinode *)main_bm_bh->b_data;
+ /* main_bm_bh is validated by inode read inside ocfs2_inode_lock(),
+ * so any corruption is a code bug. */
+ BUG_ON(!OCFS2_IS_VALID_DINODE(fe));
+
if (le16_to_cpu(fe->id2.i_chain.cl_cpg) !=
ocfs2_group_bitmap_size(osb->sb) * 8) {
mlog(ML_ERROR, "The disk is too old and small. "
@@ -322,12 +326,6 @@ int ocfs2_group_extend(struct inode * inode, int new_clusters)
goto out_unlock;
}
- if (!OCFS2_IS_VALID_DINODE(fe)) {
- OCFS2_RO_ON_INVALID_DINODE(main_bm_inode->i_sb, fe);
- ret = -EIO;
- goto out_unlock;
- }
-
first_new_cluster = le32_to_cpu(fe->i_clusters);
lgd_blkno = ocfs2_which_cluster_group(main_bm_inode,
first_new_cluster - 1);