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util: sock_l4() determine protocol from epoll type rather than the reverse

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sock_l4() creates a socket of the given IP protocol number, and adds it to
the epoll state.  Currently it determines the correct tag for the epoll
data based on the protocol.  However, we have some future cases where we
might want different semantics, and therefore epoll types, for sockets of
the same protocol.  So, change sock_l4() to take the epoll type as an
explicit parameter, and determine the protocol from that.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
David Gibson 2024-07-05 20:43:59 +10:00 • committed by Stefano Brivio
parent b625ed5fee
commit 74c1c5efcf
7 changed files with 81 additions and 67 deletions

12
udp.c
View file

@ -917,7 +917,7 @@ int udp_tap_handler(struct ctx *c, uint8_t pif,
if (!IN4_IS_ADDR_LOOPBACK(&s_in.sin_addr))
bind_addr = c->ip4.addr_out;
s = sock_l4(c, AF_INET, IPPROTO_UDP, &bind_addr,
s = sock_l4(c, AF_INET, EPOLL_TYPE_UDP, &bind_addr,
bind_if, src, uref.u32);
if (s < 0)
return p->count - idx;
@ -972,7 +972,7 @@ int udp_tap_handler(struct ctx *c, uint8_t pif,
!IN6_IS_ADDR_LINKLOCAL(&s_in6.sin6_addr))
bind_addr = &c->ip6.addr_out;
s = sock_l4(c, AF_INET6, IPPROTO_UDP, bind_addr,
s = sock_l4(c, AF_INET6, EPOLL_TYPE_UDP, bind_addr,
bind_if, src, uref.u32);
if (s < 0)
return p->count - idx;
@ -1047,13 +1047,13 @@ int udp_sock_init(const struct ctx *c, int ns, sa_family_t af,
uref.v6 = 0;
if (!ns) {
r4 = s = sock_l4(c, AF_INET, IPPROTO_UDP, addr,
r4 = s = sock_l4(c, AF_INET, EPOLL_TYPE_UDP, addr,
ifname, port, uref.u32);
udp_tap_map[V4][port].sock = s < 0 ? -1 : s;
udp_splice_init[V4][port].sock = s < 0 ? -1 : s;
} else {
r4 = s = sock_l4(c, AF_INET, IPPROTO_UDP,
r4 = s = sock_l4(c, AF_INET, EPOLL_TYPE_UDP,
&in4addr_loopback,
ifname, port, uref.u32);
udp_splice_ns[V4][port].sock = s < 0 ? -1 : s;
@ -1064,13 +1064,13 @@ int udp_sock_init(const struct ctx *c, int ns, sa_family_t af,
uref.v6 = 1;
if (!ns) {
r6 = s = sock_l4(c, AF_INET6, IPPROTO_UDP, addr,
r6 = s = sock_l4(c, AF_INET6, EPOLL_TYPE_UDP, addr,
ifname, port, uref.u32);
udp_tap_map[V6][port].sock = s < 0 ? -1 : s;
udp_splice_init[V6][port].sock = s < 0 ? -1 : s;
} else {
r6 = s = sock_l4(c, AF_INET6, IPPROTO_UDP,
r6 = s = sock_l4(c, AF_INET6, EPOLL_TYPE_UDP,
&in6addr_loopback,
ifname, port, uref.u32);
udp_splice_ns[V6][port].sock = s < 0 ? -1 : s;