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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>
This commit is contained in:
Joel Becker 2006-02-28 17:58:36 -08:00 committed by Mark Fasheh
parent 93cc9ac455
commit 110ba90858
1 changed files with 36 additions and 2 deletions
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38
fs/ocfs2/extent_map.c
View File

@ -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