Author: glebius
Date: Thu Sep 18 09:54:57 2014
New Revision: 271751
URL: http://svnweb.freebsd.org/changeset/base/271751
Log:
Add if_inc_counter(), a generic method to update ifnet(9) counter
w/o dereferencing the struct.
Sponsored by: Netflix
Sponsored by: Nginx, Inc.
Modified:
head/sys/net/if.c
head/sys/net/if_var.h
Modified: head/sys/net/if.c
==============================================================================
--- head/sys/net/if.c Thu Sep 18 09:49:49 2014 (r271750)
+++ head/sys/net/if.c Thu Sep 18 09:54:57 2014 (r271751)
@@ -1422,6 +1422,56 @@ if_get_counter_compat(struct ifnet *ifp,
}
/*
+ * Increase an ifnet counter. Usually used for counters shared
+ * between the stack and a driver, but function supports them all.
+ */
+void
+if_inc_counter(struct ifnet *ifp, ifnet_counter cnt, int64_t inc)
+{
+
+ switch (cnt) {
+ case IFCOUNTER_IPACKETS:
+ ifp->if_ipackets += inc;
+ break;
+ case IFCOUNTER_IERRORS:
+ ifp->if_ierrors += inc;
+ break;
+ case IFCOUNTER_OPACKETS:
+ ifp->if_opackets += inc;
+ break;
+ case IFCOUNTER_OERRORS:
+ ifp->if_oerrors += inc;
+ break;
+ case IFCOUNTER_COLLISIONS:
+ ifp->if_collisions += inc;
+ break;
+ case IFCOUNTER_IBYTES:
+ ifp->if_ibytes += inc;
+ break;
+ case IFCOUNTER_OBYTES:
+ ifp->if_obytes += inc;
+ break;
+ case IFCOUNTER_IMCASTS:
+ ifp->if_imcasts += inc;
+ break;
+ case IFCOUNTER_OMCASTS:
+ ifp->if_omcasts += inc;
+ break;
+ case IFCOUNTER_IQDROPS:
+ ifp->if_iqdrops += inc;
+ break;
+ case IFCOUNTER_OQDROPS:
+ ifp->if_oqdrops += inc;
+ break;
+ case IFCOUNTER_NOPROTO:
+ ifp->if_noproto += inc;
+ break;
+ default:
+ panic("%s: unknown counter %d", __func__, cnt);
+ }
+}
+
+/*
* Copy data from ifnet to userland API structure if_data.
*/
void
Modified: head/sys/net/if_var.h
==============================================================================
--- head/sys/net/if_var.h Thu Sep 18 09:49:49 2014 (r271750)
+++ head/sys/net/if_var.h Thu Sep 18 09:54:57 2014 (r271751)
@@ -528,6 +528,7 @@ void if_register_com_alloc(u_char type,
void if_deregister_com_alloc(u_char type);
void if_data_copy(struct ifnet *, struct if_data *);
uint64_t if_get_counter_compat(struct ifnet *, ifnet_counter);
+void if_inc_counter(struct ifnet *, ifnet_counter, int64_t);
#define IF_LLADDR(ifp) \
LLADDR((struct sockaddr_dl *)((ifp)->if_addr->ifa_addr))
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