ipvs: optimize checksums for apps

[mirror_ubuntu-zesty-kernel.git] / include / net / ip_vs.h

diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h
index 6e8a6192e5746f12db408c669f1e0a8b5e7f189e..adcdba9dd183bd74e57019f48ba75d17b90edf5c 100644 (file)
--- a/include/net/ip_vs.h
+++ b/include/net/ip_vs.h
@@ -597,11 +597,19 @@ struct ip_vs_app {
        __be16                  port;           /* port number in net order */
        atomic_t                usecnt;         /* usage counter */
 
-       /* output hook: return false if can't linearize. diff set for TCP.  */
+       /*
+        * output hook: Process packet in inout direction, diff set for TCP.
+        * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok,
+        *         2=Mangled but checksum was not updated
+        */
        int (*pkt_out)(struct ip_vs_app *, struct ip_vs_conn *,
                       struct sk_buff *, int *diff);
 
-       /* input hook: return false if can't linearize. diff set for TCP. */
+       /*
+        * input hook: Process packet in outin direction, diff set for TCP.
+        * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok,
+        *         2=Mangled but checksum was not updated
+        */
        int (*pkt_in)(struct ip_vs_app *, struct ip_vs_conn *,
                      struct sk_buff *, int *diff);