new helper: security_sb_eat_lsm_opts()

combination of alloc_secdata(), security_sb_copy_data(),
security_sb_parse_opt_str() and free_secdata().

Reviewed-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 12 insertions, 3 deletions

diff --git a/security/security.c b/security/security.c
index 3f50beb30fb1..02c656dd5c0c 100644
--- a/security/security.c
+++ b/security/security.c
@@ -384,11 +384,20 @@ void security_sb_free(struct super_block *sb)
         call_void_hook(sb_free_security, sb);
 }
 
-int security_sb_copy_data(char *orig, char *copy)
+int security_sb_eat_lsm_opts(char *options, struct security_mnt_opts *opts)
 {
-        return call_int_hook(sb_copy_data, 0, orig, copy);
+        char *s = (char *)get_zeroed_page(GFP_KERNEL);
+        int err;
+
+        if (!s)
+                return -ENOMEM;
+        err = call_int_hook(sb_copy_data, 0, options, s);
+        if (!err)
+                err = call_int_hook(sb_parse_opts_str, 0, s, opts);
+        free_page((unsigned long)s);
+        return err;
 }
-EXPORT_SYMBOL(security_sb_copy_data);
+EXPORT_SYMBOL(security_sb_eat_lsm_opts);
 
 int security_sb_remount(struct super_block *sb,
                         struct security_mnt_opts *opts)