diff options
author | Joel Becker <joel.becker@oracle.com> | 2006-02-28 17:58:36 -0800 |
---|---|---|
committer | Mark Fasheh <mark.fasheh@oracle.com> | 2006-03-01 11:44:50 -0800 |
commit | 110ba90858a7f619ff26c6b9b43c27b3c0872335 (patch) | |
tree | 2a28b91a66b7570b576a581f50e512f3f316a8af /fs/ocfs2 | |
parent | 93cc9ac4555a9b95c78b2f5dfe536fe8196002a7 (diff) | |
download | lwn-110ba90858a7f619ff26c6b9b43c27b3c0872335.tar.gz lwn-110ba90858a7f619ff26c6b9b43c27b3c0872335.zip |
ocfs2: Respond to on-disk corruption in the extent map code.
The extent map code has long noticed when the on-disk extent information
is corrupt. However, so far it has only returned an error. We should
take the filesystem read-only, as it is corrupt.
Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
Diffstat (limited to 'fs/ocfs2')
-rw-r--r-- | fs/ocfs2/extent_map.c | 38 |
1 files changed, 36 insertions, 2 deletions
diff --git a/fs/ocfs2/extent_map.c b/fs/ocfs2/extent_map.c index b6ba292e9544..e6f207eebab4 100644 --- a/fs/ocfs2/extent_map.c +++ b/fs/ocfs2/extent_map.c @@ -181,6 +181,12 @@ static int ocfs2_extent_map_find_leaf(struct inode *inode, ret = -EBADR; if (rec_end > OCFS2_I(inode)->ip_clusters) { mlog_errno(ret); + ocfs2_error(inode->i_sb, + "Extent %d at e_blkno %"MLFu64" of inode %"MLFu64" goes past ip_clusters of %u\n", + i, + le64_to_cpu(rec->e_blkno), + OCFS2_I(inode)->ip_blkno, + OCFS2_I(inode)->ip_clusters); goto out_free; } @@ -226,6 +232,12 @@ static int ocfs2_extent_map_find_leaf(struct inode *inode, ret = -EBADR; if (blkno) { mlog_errno(ret); + ocfs2_error(inode->i_sb, + "Multiple extents for (cpos = %u, clusters = %u) on inode %"MLFu64"; e_blkno %"MLFu64" and rec %d at e_blkno %"MLFu64"\n", + cpos, clusters, + OCFS2_I(inode)->ip_blkno, + blkno, i, + le64_to_cpu(rec->e_blkno)); goto out_free; } @@ -238,6 +250,10 @@ static int ocfs2_extent_map_find_leaf(struct inode *inode, */ ret = -EBADR; if (!blkno) { + ocfs2_error(inode->i_sb, + "No record found for (cpos = %u, clusters = %u) on inode %"MLFu64"\n", + cpos, clusters, + OCFS2_I(inode)->ip_blkno); mlog_errno(ret); goto out_free; } @@ -266,6 +282,20 @@ static int ocfs2_extent_map_find_leaf(struct inode *inode, for (i = 0; i < le16_to_cpu(el->l_next_free_rec); i++) { rec = &el->l_recs[i]; + + if ((le32_to_cpu(rec->e_cpos) + le32_to_cpu(rec->e_clusters)) > + OCFS2_I(inode)->ip_clusters) { + ret = -EBADR; + mlog_errno(ret); + ocfs2_error(inode->i_sb, + "Extent %d at e_blkno %"MLFu64" of inode %"MLFu64" goes past ip_clusters of %u\n", + i, + le64_to_cpu(rec->e_blkno), + OCFS2_I(inode)->ip_blkno, + OCFS2_I(inode)->ip_clusters); + return ret; + } + ret = ocfs2_extent_map_insert(inode, rec, le16_to_cpu(el->l_tree_depth)); if (ret) { @@ -526,6 +556,10 @@ static int ocfs2_extent_map_insert(struct inode *inode, OCFS2_I(inode)->ip_map.em_clusters) { ret = -EBADR; mlog_errno(ret); + ocfs2_error(inode->i_sb, + "Zero e_clusters on non-tail extent record at e_blkno %"MLFu64" on inode %"MLFu64"\n", + le64_to_cpu(rec->e_blkno), + OCFS2_I(inode)->ip_blkno); return ret; } @@ -588,12 +622,12 @@ static int ocfs2_extent_map_insert(struct inode *inode, * Existing record in the extent map: * * cpos = 10, len = 10 - * |---------| + * |---------| * * New Record: * * cpos = 10, len = 20 - * |------------------| + * |------------------| * * The passed record is the new on-disk record. The new_clusters value * is how many clusters were added to the file. If the append is a |