X25: Enable setting of cause and diagnostic fields

Adds SIOCX25SCAUSEDIAG, allowing X.25 programs to set the cause and
diagnostic fields.

Normally used to indicate status upon closing connections.

Signed-off-by: Andrew Hendry <andrew.hendry@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 12 insertions, 0 deletions

diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c
index 39ce03e07d18..ac7dba46fa33 100644
--- a/net/x25/af_x25.c
+++ b/net/x25/af_x25.c
@@ -1471,6 +1471,17 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
                         break;
                 }
 
+                case SIOCX25SCAUSEDIAG: {
+                        struct x25_causediag causediag;
+                        rc = -EFAULT;
+                        if (copy_from_user(&causediag, argp, sizeof(causediag)))
+                                break;
+                        x25->causediag = causediag;
+                        rc = 0;
+                        break;
+
+                }
+
                 case SIOCX25SCUDMATCHLEN: {
                         struct x25_subaddr sub_addr;
                         rc = -EINVAL;
@@ -1639,6 +1650,7 @@ static int compat_x25_ioctl(struct socket *sock, unsigned int cmd,
         case SIOCX25GCALLUSERDATA:
         case SIOCX25SCALLUSERDATA:
         case SIOCX25GCAUSEDIAG:
+        case SIOCX25SCAUSEDIAG:
         case SIOCX25SCUDMATCHLEN:
         case SIOCX25CALLACCPTAPPRV:
         case SIOCX25SENDCALLACCPT: