LSM: Add flags field to security_sb_set_mnt_opts for in kernel mount data.

There is no way to differentiate if a text mount option is passed from user
space or the kernel. A flags field is being added to the
security_sb_set_mnt_opts hook to allow for in kernel security flags to be sent
to the LSM for processing in addition to the text options received from mount.
This patch also updated existing code to fix compilation errors.

Acked-by: Eric Paris <eparis@redhat.com>
Acked-by: James Morris <james.l.morris@oracle.com>
Signed-off-by: David P. Quigley <dpquigl@tycho.nsa.gov>
Signed-off-by: Miguel Rodel Felipe <Rodel_FM@dsi.a-star.edu.sg>
Signed-off-by: Phua Eu Gene <PHUA_Eu_Gene@dsi.a-star.edu.sg>
Signed-off-by: Khin Mi Mi Aung <Mi_Mi_AUNG@dsi.a-star.edu.sg>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/security/security.c b/security/security.c
index c3ceb754e705..8d0b9a79611a 100644
--- a/security/security.c
+++ b/security/security.c
@@ -294,9 +294,12 @@ int security_sb_pivotroot(struct path *old_path, struct path *new_path)
 }
 
 int security_sb_set_mnt_opts(struct super_block *sb,
-                                struct security_mnt_opts *opts)
+                                struct security_mnt_opts *opts,
+                                unsigned long kern_flags,
+                                unsigned long *set_kern_flags)
 {
-        return security_ops->sb_set_mnt_opts(sb, opts);
+        return security_ops->sb_set_mnt_opts(sb, opts, kern_flags,
+                                                set_kern_flags);
 }
 EXPORT_SYMBOL(security_sb_set_mnt_opts);