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ocfs2: Reset xattr value size after xa_cleanup_value_truncate().

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In ocfs2_prepare_xattr_entry, if we fail to grow an existing value,
xa_cleanup_value_truncate() will leave the old entry in place.  Thus, we
reset its value size.  However, if we were allocating a new value, we
must not reset the value size or we will BUG().  This resolves
oss.oracle.com bug 1247.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
This commit is contained in:
Tao Ma 2010-05-10 18:09:47 +08:00 committed by Joel Becker
parent 41841b0bce
commit d5a7df0649
1 changed files with 10 additions and 7 deletions
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17
fs/ocfs2/xattr.c
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@ -2135,15 +2135,18 @@ alloc_value:
orig_clusters = ocfs2_xa_value_clusters(loc);
rc = ocfs2_xa_value_truncate(loc, xi->xi_value_len, ctxt);
if (rc < 0) {
/*
* If we tried to grow an existing external value,
* ocfs2_xa_cleanuP-value_truncate() is going to
* let it stand. We have to restore its original
* value size.
*/
loc->xl_entry->xe_value_size = orig_value_size;
ocfs2_xa_cleanup_value_truncate(loc, "growing",
orig_clusters);
/*
* If we were growing an existing value,
* ocfs2_xa_cleanup_value_truncate() won't remove
* the entry. We need to restore the original value
* size.
*/
if (loc->xl_entry) {
BUG_ON(!orig_value_size);
loc->xl_entry->xe_value_size = orig_value_size;
}
mlog_errno(rc);
}
}