[MLSXFRM]: Add security sid to flowi
authorVenkat Yekkirala <vyekkirala@TrustedCS.com>
Tue, 25 Jul 2006 06:28:37 +0000 (23:28 -0700)
committerDavid S. Miller <davem@sunset.davemloft.net>
Fri, 22 Sep 2006 21:53:23 +0000 (14:53 -0700)
This adds security to flow key for labeling of flows as also to allow
for making flow cache lookups based on the security label seemless.

Signed-off-by: Venkat Yekkirala <vyekkirala@TrustedCS.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Documentation/networking/secid.txt [new file with mode: 0644]
include/net/flow.h

diff --git a/Documentation/networking/secid.txt b/Documentation/networking/secid.txt
new file mode 100644 (file)
index 0000000..95ea067
--- /dev/null
@@ -0,0 +1,14 @@
+flowi structure:
+
+The secid member in the flow structure is used in LSMs (e.g. SELinux) to indicate
+the label of the flow. This label of the flow is currently used in selecting
+matching labeled xfrm(s).
+
+If this is an outbound flow, the label is derived from the socket, if any, or
+the incoming packet this flow is being generated as a response to (e.g. tcp
+resets, timewait ack, etc.). It is also conceivable that the label could be
+derived from other sources such as process context, device, etc., in special
+cases, as may be appropriate.
+
+If this is an inbound flow, the label is derived from the IPSec security
+associations, if any, used by the packet.
index 04d89f7634516170d88e6d3f47f20bec477b55dc..1cee5a83433abc7b071dceb1892074fdfd50ba30 100644 (file)
@@ -78,6 +78,7 @@ struct flowi {
 #define fl_icmp_type   uli_u.icmpt.type
 #define fl_icmp_code   uli_u.icmpt.code
 #define fl_ipsec_spi   uli_u.spi
+       __u32           secid;  /* used by xfrm; see secid.txt */
 } __attribute__((__aligned__(BITS_PER_LONG/8)));
 
 #define FLOW_DIR_IN    0