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IfAPI: Add iterator to loop over all interfaces

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Summary:
Sometimes it's useful to iterate over all interfaces in the current
VNET, as the linuxulator does in several places.

Unlike other iterators in the IfAPI this propagates any error received
up to the caller, instead of returning a count.

Sponsored by:	Juniper Networks, Inc.
Reviewed by:	glebius, melifaro
Differential Revision: https://reviews.freebsd.org/D38348
This commit is contained in:
Justin Hibbits 2023-02-01 16:28:11 -05:00
parent a1f8a0c793
commit 2eeb808361
2 changed files with 22 additions and 0 deletions
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19
sys/net/if.c
View File

@ -4466,6 +4466,25 @@ if_lladdr_count(if_t ifp)
return (count);
}
int
if_foreach(if_foreach_cb_t cb, void *cb_arg)
{
if_t ifp;
int error;
NET_EPOCH_ASSERT();
MPASS(cb);
error = 0;
CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
error = cb(ifp, cb_arg);
if (error != 0)
break;
}
return (error);
}
u_int
if_foreach_lladdr(if_t ifp, iflladdr_cb_t cb, void *cb_arg)
{

3
sys/net/if_var.h
View File

@ -665,6 +665,9 @@ struct ifaddr * if_getifaddr(const if_t ifp);
typedef u_int if_addr_cb_t(void *, struct ifaddr *, u_int);
u_int if_foreach_addr_type(if_t ifp, int type, if_addr_cb_t cb, void *cb_arg);
typedef int (*if_foreach_cb_t)(if_t, void *);
int if_foreach(if_foreach_cb_t, void *);
/* Functions */
void if_setinitfn(if_t ifp, if_init_fn_t);
void if_setinputfn(if_t ifp, if_input_fn_t);