fix up security_socket_getpeersec_* documentation

Update the security_socket_peersec documentation in
include/linux/security.h.  security_socket_peersec has been split
into two functions - _stream and _dgram, with new capabilities.

Signed-off-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>

1 files changed, 15 insertions, 2 deletions

diff --git a/include/linux/security.h b/include/linux/security.h
index ff3f857f695..ac050830a87 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -832,9 +832,11 @@ struct request_sock;
  *      incoming sk_buff @skb has been associated with a particular socket, @sk.
  *      @sk contains the sock (not socket) associated with the incoming sk_buff.
  *      @skb contains the incoming network data.
- * @socket_getpeersec:
+ * @socket_getpeersec_stream:
  *      This hook allows the security module to provide peer socket security
- *      state to userspace via getsockopt SO_GETPEERSEC.
+ *      state for unix or connected tcp sockets to userspace via getsockopt
+ *      SO_GETPEERSEC.  For tcp sockets this can be meaningful if the
+ *      socket is associated with an ipsec SA.
  *      @sock is the local socket.
  *      @optval userspace memory where the security state is to be copied.
  *      @optlen userspace int where the module should copy the actual length
@@ -843,6 +845,17 @@ struct request_sock;
  *      by the caller.
  *      Return 0 if all is well, otherwise, typical getsockopt return
  *      values.
+ * @socket_getpeersec_dgram:
+ *      This hook allows the security module to provide peer socket security
+ *      state for udp sockets on a per-packet basis to userspace via
+ *      getsockopt SO_GETPEERSEC.  The application must first have indicated
+ *      the IP_PASSSEC option via getsockopt.  It can then retrieve the
+ *      security state returned by this hook for a packet via the SCM_SECURITY
+ *      ancillary message type.
+ *      @skb is the skbuff for the packet being queried
+ *      @secdata is a pointer to a buffer in which to copy the security data
+ *      @seclen is the maximum length for @secdata
+ *      Return 0 on success, error on failure.
  * @sk_alloc_security:
  *      Allocate and attach a security structure to the sk->sk_security field,
  *      which is used to copy security attributes between local stream sockets.