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Add if_inc_counter(), a generic method to update ifnet(9) counter

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w/o dereferencing the struct.

Sponsored by:	Netflix
Sponsored by:	Nginx, Inc.
This commit is contained in:
Gleb Smirnoff 2014-09-18 09:54:57 +00:00
parent 6dfc9e44fa
commit 0b7b006c7f
2 changed files with 51 additions and 0 deletions
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50
sys/net/if.c
View File

@ -1421,6 +1421,56 @@ if_get_counter_compat(struct ifnet *ifp, ifnet_counter cnt)
panic("%s: unknown counter %d", __func__, cnt);
}
/*
* 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.
*/

1
sys/net/if_var.h
View File

@ -528,6 +528,7 @@ void if_register_com_alloc(u_char type, if_com_alloc_t *a, if_com_free_t *f);
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))