audit: set the name_len in audit_inode for parent lookups

[linux-beck.git] / kernel / auditfilter.c

diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c
index c4bcdbaf4d4de9bdc6f22de554c4bb18c8e9ca93..71bb13598df392ceac7bae731e211c6039ee87d2 100644 (file)
--- a/kernel/auditfilter.c
+++ b/kernel/auditfilter.c
@@ -1298,6 +1298,36 @@ int audit_gid_comparator(kgid_t left, u32 op, kgid_t right)
        }
 }
 
+/**
+ * parent_len - find the length of the parent portion of a pathname
+ * @path: pathname of which to determine length
+ */
+int parent_len(const char *path)
+{
+       int plen;
+       const char *p;
+
+       plen = strlen(path);
+
+       if (plen == 0)
+               return plen;
+
+       /* disregard trailing slashes */
+       p = path + plen - 1;
+       while ((*p == '/') && (p > path))
+               p--;
+
+       /* walk backward until we find the next slash or hit beginning */
+       while ((*p != '/') && (p > path))
+               p--;
+
+       /* did we find a slash? Then increment to include it in path */
+       if (*p == '/')
+               p++;
+
+       return p - path;
+}
+
 /* Compare given dentry name with last component in given path,
  * return of 0 indicates a match. */
 int audit_compare_dname_path(const char *dname, const char *path,