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udp: embed inpcb into udpcb

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See similar change to TCP e68b379244 for more context.  For UDP the
change is much simplier, though.
This commit is contained in:
Gleb Smirnoff 2022-12-07 11:51:42 -08:00
parent c24a6b32bb
commit 483fe96511
3 changed files with 11 additions and 54 deletions
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48
sys/netinet/udp_usrreq.c
View File

@ -149,8 +149,6 @@ SYSCTL_ULONG(_net_inet_udp, UDPCTL_RECVSPACE, recvspace, CTLFLAG_RW,
VNET_DEFINE(struct inpcbinfo, udbinfo);
VNET_DEFINE(struct inpcbinfo, ulitecbinfo);
VNET_DEFINE_STATIC(uma_zone_t, udpcb_zone);
#define V_udpcb_zone VNET(udpcb_zone)
#ifndef UDBHASHSIZE
#define UDBHASHSIZE 128
@ -170,8 +168,8 @@ static int udp_output(struct inpcb *, struct mbuf *, struct sockaddr *,
struct mbuf *, struct thread *, int);
#endif
INPCBSTORAGE_DEFINE(udpcbstor, inpcb, "udpinp", "udp_inpcb", "udp", "udphash");
INPCBSTORAGE_DEFINE(udplitecbstor, inpcb, "udpliteinp", "udplite_inpcb",
INPCBSTORAGE_DEFINE(udpcbstor, udpcb, "udpinp", "udp_inpcb", "udp", "udphash");
INPCBSTORAGE_DEFINE(udplitecbstor, udpcb, "udpliteinp", "udplite_inpcb",
"udplite", "udplitehash");
static void
@ -186,11 +184,6 @@ udp_vnet_init(void *arg __unused)
* a 4-tuple, flip this to 4-tuple.
*/
in_pcbinfo_init(&V_udbinfo, &udpcbstor, UDBHASHSIZE, UDBHASHSIZE);
V_udpcb_zone = uma_zcreate("udpcb", sizeof(struct udpcb),
NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0);
uma_zone_set_max(V_udpcb_zone, maxsockets);
uma_zone_set_warning(V_udpcb_zone, "kern.ipc.maxsockets limit reached");
/* Additional pcbinfo for UDP-Lite */
in_pcbinfo_init(&V_ulitecbinfo, &udplitecbstor, UDBHASHSIZE,
UDBHASHSIZE);
@ -212,25 +205,6 @@ kmod_udpstat_inc(int statnum)
counter_u64_add(VNET(udpstat)[statnum], 1);
}
int
udp_newudpcb(struct inpcb *inp)
{
struct udpcb *up;
up = uma_zalloc(V_udpcb_zone, M_NOWAIT | M_ZERO);
if (up == NULL)
return (ENOBUFS);
inp->inp_ppcb = up;
return (0);
}
void
udp_discardcb(struct udpcb *up)
{
uma_zfree(V_udpcb_zone, up);
}
#ifdef VIMAGE
static void
udp_destroy(void *unused __unused)
@ -238,7 +212,6 @@ udp_destroy(void *unused __unused)
in_pcbinfo_destroy(&V_udbinfo);
in_pcbinfo_destroy(&V_ulitecbinfo);
uma_zdestroy(V_udpcb_zone);
}
VNET_SYSUNINIT(udp, SI_SUB_PROTO_DOMAIN, SI_ORDER_FOURTH, udp_destroy, NULL);
#endif
@ -1482,8 +1455,9 @@ static int
udp_attach(struct socket *so, int proto, struct thread *td)
{
static uint32_t udp_flowid;
struct inpcb *inp;
struct inpcbinfo *pcbinfo;
struct inpcb *inp;
struct udpcb *up;
int error;
pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
@ -1500,13 +1474,8 @@ udp_attach(struct socket *so, int proto, struct thread *td)
inp->inp_ip_ttl = V_ip_defttl;
inp->inp_flowid = atomic_fetchadd_int(&udp_flowid, 1);
inp->inp_flowtype = M_HASHTYPE_OPAQUE;
error = udp_newudpcb(inp);
if (error) {
in_pcbdetach(inp);
in_pcbfree(inp);
return (error);
}
up = intoudpcb(inp);
bzero(&up->u_start_zero, u_zero_size);
INP_WUNLOCK(inp);
return (0);
@ -1636,19 +1605,14 @@ static void
udp_detach(struct socket *so)
{
struct inpcb *inp;
struct udpcb *up;
inp = sotoinpcb(so);
KASSERT(inp != NULL, ("udp_detach: inp == NULL"));
KASSERT(inp->inp_faddr.s_addr == INADDR_ANY,
("udp_detach: not disconnected"));
INP_WLOCK(inp);
up = intoudpcb(inp);
KASSERT(up != NULL, ("%s: up == NULL", __func__));
inp->inp_ppcb = NULL;
in_pcbdetach(inp);
in_pcbfree(inp);
udp_discardcb(up);
}
pr_disconnect_t udp_disconnect; /* shared with udp6_usrreq.c */

9
sys/netinet/udp_var.h
View File

@ -110,6 +110,10 @@ typedef void udp_tun_icmp_t(udp_tun_icmp_param_t);
* UDP control block; one per udp.
*/
struct udpcb {
struct inpcb u_inpcb;
#define u_start_zero u_tun_func
#define u_zero_size (sizeof(struct udpcb) - \
offsetof(struct udpcb, u_start_zero))
udp_tun_func_t *u_tun_func; /* UDP kernel tunneling callback. */
udp_tun_icmp_t *u_icmp_func; /* UDP kernel tunneling icmp callback */
u_int u_flags; /* Generic UDP flags. */
@ -118,7 +122,7 @@ struct udpcb {
void *u_tun_ctx; /* Tunneling callback context. */
};
#define intoudpcb(ip) ((struct udpcb *)(ip)->inp_ppcb)
#define intoudpcb(ip) __containerof((inp), struct udpcb, u_inpcb)
#define sotoudpcb(so) (intoudpcb(sotoinpcb(so)))
VNET_PCPUSTAT_DECLARE(struct udpstat, udpstat);
@ -164,9 +168,6 @@ udp_get_inpcbinfo(int protocol)
return (protocol == IPPROTO_UDP) ? &V_udbinfo : &V_ulitecbinfo;
}
int udp_newudpcb(struct inpcb *);
void udp_discardcb(struct udpcb *);
int udp_ctloutput(struct socket *, struct sockopt *);
void udplite_input(struct mbuf *, int);
struct inpcb *udp_notify(struct inpcb *inp, int errno);

8
sys/netinet6/udp6_usrreq.c
View File

@ -1005,13 +1005,6 @@ udp6_attach(struct socket *so, int proto, struct thread *td)
* which may match an IPv4-mapped IPv6 address.
*/
inp->inp_ip_ttl = V_ip_defttl;
error = udp_newudpcb(inp);
if (error) {
in_pcbdetach(inp);
in_pcbfree(inp);
return (error);
}
INP_WUNLOCK(inp);
return (0);
}
@ -1213,7 +1206,6 @@ udp6_detach(struct socket *so)
KASSERT(up != NULL, ("%s: up == NULL", __func__));
in_pcbdetach(inp);
in_pcbfree(inp);
udp_discardcb(up);
}
static int