eCryptfs: Print FNEK sig properly in /proc/mounts

The filename encryption key signature is not properly displayed in
/proc/mounts.  The "ecryptfs_sig=" mount option name is displayed for
all global authentication tokens, included those for filename keys.

This patch checks the global authentication token flags to determine if
the key is a FEKEK or FNEK and prints the appropriate mount option name
before the signature.

Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/fs/ecryptfs/super.c b/fs/ecryptfs/super.c
index c27ac2b358a1..b5003023f106 100644
--- a/fs/ecryptfs/super.c
+++ b/fs/ecryptfs/super.c
@@ -170,7 +170,10 @@ static int ecryptfs_show_options(struct seq_file *m, struct vfsmount *mnt)
         list_for_each_entry(walker,
                             &mount_crypt_stat->global_auth_tok_list,
                             mount_crypt_stat_list) {
-                seq_printf(m, ",ecryptfs_sig=%s", walker->sig);
+                if (walker->flags & ECRYPTFS_AUTH_TOK_FNEK)
+                        seq_printf(m, ",ecryptfs_fnek_sig=%s", walker->sig);
+                else
+                        seq_printf(m, ",ecryptfs_sig=%s", walker->sig);
         }
         mutex_unlock(&mount_crypt_stat->global_auth_tok_list_mutex);