int
so_pru_attach_fast(struct socket *so, int proto, struct pru_attach_info *ai)
{
struct netmsg_pru_attach *msg;
int error;
error = so->so_proto->pr_usrreqs->pru_preattach(so, proto, ai);
if (error)
return error;
msg = kmalloc(sizeof(*msg), M_LWKTMSG, M_WAITOK | M_NULLOK);
if (msg == NULL) {
/*
* Fail to allocate message; fallback to
* synchronized pru_attach.
*/
return so_pru_attach(so, proto, NULL /* postattach */);
}
netmsg_init(&msg->base, so, &netisr_afree_rport, 0,
so->so_proto->pr_usrreqs->pru_attach);
msg->nm_proto = proto;
msg->nm_ai = NULL; /* postattach */
lwkt_sendmsg(so->so_port, &msg->base.lmsg);
return 0;
}
int
socreate(int dom, struct socket **aso, int type,
int proto, struct thread *td)
{
struct proc *p = td->td_proc;
struct protosw *prp;
struct socket *so;
struct pru_attach_info ai;
int error;
if (proto)
prp = pffindproto(dom, proto, type);
else
prp = pffindtype(dom, type);
if (prp == 0 || prp->pr_usrreqs->pru_attach == 0)
return (EPROTONOSUPPORT);
if (p->p_ucred->cr_prison && jail_socket_unixiproute_only &&
prp->pr_domain->dom_family != PF_LOCAL &&
prp->pr_domain->dom_family != PF_INET &&
prp->pr_domain->dom_family != PF_INET6 &&
prp->pr_domain->dom_family != PF_ROUTE) {
return (EPROTONOSUPPORT);
}
if (prp->pr_type != type)
return (EPROTOTYPE);
so = soalloc(p != 0);
if (so == NULL)
return (ENOBUFS);
/*
* Callers of socreate() presumably will connect up a descriptor
* and call soclose() if they cannot. This represents our so_refs
* (which should be 1) from soalloc().
*/
soclrstate(so, SS_NOFDREF);
/*
* Set a default port for protocol processing. No action will occur
* on the socket on this port until an inpcb is attached to it and
* is able to match incoming packets, or until the socket becomes
* available to userland.
*
* We normally default the socket to the protocol thread on cpu 0.
* If PR_SYNC_PORT is set (unix domain sockets) there is no protocol
* thread and all pr_*()/pru_*() calls are executed synchronously.
*/
if (prp->pr_flags & PR_SYNC_PORT)
so->so_port = &netisr_sync_port;
else
so->so_port = cpu_portfn(0);
TAILQ_INIT(&so->so_incomp);
TAILQ_INIT(&so->so_comp);
so->so_type = type;
so->so_cred = crhold(p->p_ucred);
so->so_proto = prp;
ai.sb_rlimit = &p->p_rlimit[RLIMIT_SBSIZE];
ai.p_ucred = p->p_ucred;
ai.fd_rdir = p->p_fd->fd_rdir;
/*
* Auto-sizing of socket buffers is managed by the protocols and
* the appropriate flags must be set in the pru_attach function.
*/
error = so_pru_attach(so, proto, &ai);
if (error) {
sosetstate(so, SS_NOFDREF);
sofree(so); /* from soalloc */
return error;
}
/*
* NOTE: Returns referenced socket.
*/
*aso = so;
return (0);
}