#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/domain.h>
#include <sys/fcntl.h>
#include <sys/malloc.h>
#include <sys/file.h>
#include <sys/filedesc.h>
#include <sys/lock.h>
#include <sys/mbuf.h>
#include <sys/namei.h>
#include <sys/proc.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/stat.h>
#include <sys/sysctl.h>
#include <sys/un.h>
#include <sys/unpcb.h>
#include <sys/vnode.h>
#include <kern/zalloc.h>
struct zone *unp_zone;
static unp_gen_t unp_gencnt;
static u_int unp_count;
static struct unp_head unp_shead, unp_dhead;
static struct sockaddr sun_noname = { sizeof(sun_noname), AF_LOCAL };
static ino_t unp_ino;
static int unp_attach __P((struct socket *));
static void unp_detach __P((struct unpcb *));
static int unp_bind __P((struct unpcb *,struct sockaddr *, struct proc *));
static int unp_connect __P((struct socket *,struct sockaddr *,
struct proc *));
static void unp_disconnect __P((struct unpcb *));
static void unp_shutdown __P((struct unpcb *));
static void unp_drop __P((struct unpcb *, int));
static void unp_gc __P((void));
static void unp_scan __P((struct mbuf *, void (*)(struct file *)));
static void unp_mark __P((struct file *));
static void unp_discard __P((struct file *));
static int unp_internalize __P((struct mbuf *, struct proc *));
static int
uipc_abort(struct socket *so)
{
struct unpcb *unp = sotounpcb(so);
if (unp == 0)
return EINVAL;
unp_drop(unp, ECONNABORTED);
return 0;
}
static int
uipc_accept(struct socket *so, struct sockaddr **nam)
{
struct unpcb *unp = sotounpcb(so);
if (unp == 0)
return EINVAL;
if (unp->unp_conn && unp->unp_conn->unp_addr) {
*nam = dup_sockaddr((struct sockaddr *)unp->unp_conn->unp_addr,
1);
} else {
*nam = dup_sockaddr((struct sockaddr *)&sun_noname, 1);
}
return 0;
}
static int
uipc_attach(struct socket *so, int proto, struct proc *p)
{
struct unpcb *unp = sotounpcb(so);
if (unp != 0)
return EISCONN;
return unp_attach(so);
}
static int
uipc_bind(struct socket *so, struct sockaddr *nam, struct proc *p)
{
struct unpcb *unp = sotounpcb(so);
if (unp == 0)
return EINVAL;
return unp_bind(unp, nam, p);
}
static int
uipc_connect(struct socket *so, struct sockaddr *nam, struct proc *p)
{
struct unpcb *unp = sotounpcb(so);
if (unp == 0)
return EINVAL;
return unp_connect(so, nam, p);
}
static int
uipc_connect2(struct socket *so1, struct socket *so2)
{
struct unpcb *unp = sotounpcb(so1);
if (unp == 0)
return EINVAL;
return unp_connect2(so1, so2);
}
static int
uipc_detach(struct socket *so)
{
struct unpcb *unp = sotounpcb(so);
if (unp == 0)
return EINVAL;
unp_detach(unp);
return 0;
}
static int
uipc_disconnect(struct socket *so)
{
struct unpcb *unp = sotounpcb(so);
if (unp == 0)
return EINVAL;
unp_disconnect(unp);
return 0;
}
static int
uipc_listen(struct socket *so, struct proc *p)
{
struct unpcb *unp = sotounpcb(so);
if (unp == 0 || unp->unp_vnode == 0)
return EINVAL;
return 0;
}
static int
uipc_peeraddr(struct socket *so, struct sockaddr **nam)
{
struct unpcb *unp = sotounpcb(so);
if (unp == 0)
return EINVAL;
if (unp->unp_conn && unp->unp_conn->unp_addr)
*nam = dup_sockaddr((struct sockaddr *)unp->unp_conn->unp_addr,
1);
return 0;
}
static int
uipc_rcvd(struct socket *so, int flags)
{
struct unpcb *unp = sotounpcb(so);
struct socket *so2;
if (unp == 0)
return EINVAL;
switch (so->so_type) {
case SOCK_DGRAM:
panic("uipc_rcvd DGRAM?");
case SOCK_STREAM:
#define rcv (&so->so_rcv)
#define snd (&so2->so_snd)
if (unp->unp_conn == 0)
break;
so2 = unp->unp_conn->unp_socket;
snd->sb_mbmax += unp->unp_mbcnt - rcv->sb_mbcnt;
unp->unp_mbcnt = rcv->sb_mbcnt;
snd->sb_hiwat += unp->unp_cc - rcv->sb_cc;
unp->unp_cc = rcv->sb_cc;
sowwakeup(so2);
#undef snd
#undef rcv
break;
default:
panic("uipc_rcvd unknown socktype");
}
return 0;
}
static int
uipc_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
struct mbuf *control, struct proc *p)
{
int error = 0;
struct unpcb *unp = sotounpcb(so);
struct socket *so2;
if (unp == 0) {
error = EINVAL;
goto release;
}
if (flags & PRUS_OOB) {
error = EOPNOTSUPP;
goto release;
}
if (control && (error = unp_internalize(control, p)))
goto release;
switch (so->so_type) {
case SOCK_DGRAM:
{
struct sockaddr *from;
if (nam) {
if (unp->unp_conn) {
error = EISCONN;
break;
}
error = unp_connect(so, nam, p);
if (error)
break;
} else {
if (unp->unp_conn == 0) {
error = ENOTCONN;
break;
}
}
so2 = unp->unp_conn->unp_socket;
if (unp->unp_addr)
from = (struct sockaddr *)unp->unp_addr;
else
from = &sun_noname;
if (sbappendaddr(&so2->so_rcv, from, m, control)) {
sorwakeup(so2);
m = 0;
control = 0;
} else
error = ENOBUFS;
if (nam)
unp_disconnect(unp);
break;
}
case SOCK_STREAM:
#define rcv (&so2->so_rcv)
#define snd (&so->so_snd)
if ((so->so_state & SS_ISCONNECTED) == 0) {
if (nam) {
error = unp_connect(so, nam, p);
if (error)
break;
} else {
error = ENOTCONN;
break;
}
}
if (so->so_state & SS_CANTSENDMORE) {
error = EPIPE;
break;
}
if (unp->unp_conn == 0)
panic("uipc_send connected but no connection?");
so2 = unp->unp_conn->unp_socket;
if (control) {
if (sbappendcontrol(rcv, m, control))
control = 0;
} else
sbappend(rcv, m);
snd->sb_mbmax -=
rcv->sb_mbcnt - unp->unp_conn->unp_mbcnt;
unp->unp_conn->unp_mbcnt = rcv->sb_mbcnt;
snd->sb_hiwat -= rcv->sb_cc - unp->unp_conn->unp_cc;
unp->unp_conn->unp_cc = rcv->sb_cc;
sorwakeup(so2);
m = 0;
#undef snd
#undef rcv
break;
default:
panic("uipc_send unknown socktype");
}
if (flags & PRUS_EOF) {
socantsendmore(so);
unp_shutdown(unp);
}
release:
if (control)
m_freem(control);
if (m)
m_freem(m);
return error;
}
static int
uipc_sense(struct socket *so, struct stat *sb)
{
struct unpcb *unp = sotounpcb(so);
struct socket *so2;
if (unp == 0)
return EINVAL;
sb->st_blksize = so->so_snd.sb_hiwat;
if (so->so_type == SOCK_STREAM && unp->unp_conn != 0) {
so2 = unp->unp_conn->unp_socket;
sb->st_blksize += so2->so_rcv.sb_cc;
}
sb->st_dev = NODEV;
if (unp->unp_ino == 0)
unp->unp_ino = unp_ino++;
sb->st_ino = unp->unp_ino;
return (0);
}
static int
uipc_shutdown(struct socket *so)
{
struct unpcb *unp = sotounpcb(so);
if (unp == 0)
return EINVAL;
socantsendmore(so);
unp_shutdown(unp);
return 0;
}
static int
uipc_sockaddr(struct socket *so, struct sockaddr **nam)
{
struct unpcb *unp = sotounpcb(so);
if (unp == 0)
return EINVAL;
if (unp->unp_addr)
*nam = dup_sockaddr((struct sockaddr *)unp->unp_addr, 1);
return 0;
}
struct pr_usrreqs uipc_usrreqs = {
uipc_abort, uipc_accept, uipc_attach, uipc_bind, uipc_connect,
uipc_connect2, pru_control_notsupp, uipc_detach, uipc_disconnect,
uipc_listen, uipc_peeraddr, uipc_rcvd, pru_rcvoob_notsupp,
uipc_send, uipc_sense, uipc_shutdown, uipc_sockaddr,
sosend, soreceive, sopoll
};
#ifndef PIPSIZ
#define PIPSIZ 8192
#endif
static u_long unpst_sendspace = PIPSIZ;
static u_long unpst_recvspace = PIPSIZ;
static u_long unpdg_sendspace = 2*1024;
static u_long unpdg_recvspace = 4*1024;
static int unp_rights;
SYSCTL_DECL(_net_local_stream);
SYSCTL_INT(_net_local_stream, OID_AUTO, sendspace, CTLFLAG_RW,
&unpst_sendspace, 0, "");
SYSCTL_INT(_net_local_stream, OID_AUTO, recvspace, CTLFLAG_RW,
&unpst_recvspace, 0, "");
SYSCTL_DECL(_net_local_dgram);
SYSCTL_INT(_net_local_dgram, OID_AUTO, maxdgram, CTLFLAG_RW,
&unpdg_sendspace, 0, "");
SYSCTL_INT(_net_local_dgram, OID_AUTO, recvspace, CTLFLAG_RW,
&unpdg_recvspace, 0, "");
SYSCTL_DECL(_net_local);
SYSCTL_INT(_net_local, OID_AUTO, inflight, CTLFLAG_RD, &unp_rights, 0, "");
static int
unp_attach(so)
struct socket *so;
{
register struct unpcb *unp;
int error;
if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
switch (so->so_type) {
case SOCK_STREAM:
error = soreserve(so, unpst_sendspace, unpst_recvspace);
break;
case SOCK_DGRAM:
error = soreserve(so, unpdg_sendspace, unpdg_recvspace);
break;
default:
panic("unp_attach");
}
if (error)
return (error);
}
unp = (struct unpcb*)zalloc(unp_zone);
if (unp == NULL)
return (ENOBUFS);
bzero(unp, sizeof *unp);
unp->unp_gencnt = ++unp_gencnt;
unp_count++;
LIST_INIT(&unp->unp_refs);
unp->unp_socket = so;
LIST_INSERT_HEAD(so->so_type == SOCK_DGRAM ? &unp_dhead
: &unp_shead, unp, unp_link);
so->so_pcb = (caddr_t)unp;
return (0);
}
static void
unp_detach(unp)
register struct unpcb *unp;
{
LIST_REMOVE(unp, unp_link);
unp->unp_gencnt = ++unp_gencnt;
--unp_count;
if (unp->unp_vnode) {
struct vnode *tvp = unp->unp_vnode;
unp->unp_vnode->v_socket = 0;
unp->unp_vnode = 0;
thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
vrele(tvp);
thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
}
if (unp->unp_conn)
unp_disconnect(unp);
while (unp->unp_refs.lh_first)
unp_drop(unp->unp_refs.lh_first, ECONNRESET);
soisdisconnected(unp->unp_socket);
unp->unp_socket->so_pcb = 0;
if (unp_rights) {
sorflush(unp->unp_socket);
unp_gc();
}
if (unp->unp_addr)
FREE(unp->unp_addr, M_SONAME);
zfree(unp_zone, (vm_offset_t)unp);
}
static int
unp_bind(unp, nam, p)
struct unpcb *unp;
struct sockaddr *nam;
struct proc *p;
{
struct sockaddr_un *soun = (struct sockaddr_un *)nam;
register struct vnode *vp;
struct vattr vattr;
int error, namelen;
struct nameidata nd;
char buf[SOCK_MAXADDRLEN];
if (unp->unp_vnode != NULL)
return (EINVAL);
namelen = soun->sun_len - offsetof(struct sockaddr_un, sun_path);
if (namelen <= 0)
return EINVAL;
strncpy(buf, soun->sun_path, namelen);
buf[namelen] = 0;
thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
NDINIT(&nd, CREATE, FOLLOW | LOCKPARENT, UIO_SYSSPACE,
buf, p);
error = namei(&nd);
if (error) {
thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
return (error);
}
vp = nd.ni_vp;
if (vp != NULL) {
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
if (nd.ni_dvp == vp)
vrele(nd.ni_dvp);
else
vput(nd.ni_dvp);
vrele(vp);
thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
return (EADDRINUSE);
}
VATTR_NULL(&vattr);
vattr.va_type = VSOCK;
vattr.va_mode = (ACCESSPERMS & ~p->p_fd->fd_cmask);
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr);
#if 0
vput(nd.ni_dvp);
#endif
if (error) {
thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
return (error);
}
vp = nd.ni_vp;
vp->v_socket = unp->unp_socket;
unp->unp_vnode = vp;
unp->unp_addr = (struct sockaddr_un *)dup_sockaddr(nam, 1);
VOP_UNLOCK(vp, 0, p);
thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
return (0);
}
static int
unp_connect(so, nam, p)
struct socket *so;
struct sockaddr *nam;
struct proc *p;
{
register struct sockaddr_un *soun = (struct sockaddr_un *)nam;
register struct vnode *vp;
register struct socket *so2, *so3;
struct unpcb *unp2, *unp3;
int error, len;
struct nameidata nd;
char buf[SOCK_MAXADDRLEN];
len = nam->sa_len - offsetof(struct sockaddr_un, sun_path);
if (len <= 0)
return EINVAL;
strncpy(buf, soun->sun_path, len);
buf[len] = 0;
thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, buf, p);
error = namei(&nd);
if (error) {
thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
return (error);
}
vp = nd.ni_vp;
if (vp->v_type != VSOCK) {
error = ENOTSOCK;
goto bad;
}
error = VOP_ACCESS(vp, VWRITE, p->p_ucred, p);
if (error)
goto bad;
so2 = vp->v_socket;
if (so2 == 0) {
error = ECONNREFUSED;
goto bad;
}
if (so->so_type != so2->so_type) {
error = EPROTOTYPE;
goto bad;
}
thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
if (so->so_proto->pr_flags & PR_CONNREQUIRED) {
if ((so2->so_options & SO_ACCEPTCONN) == 0 ||
(so3 = sonewconn(so2, 0)) == 0) {
error = ECONNREFUSED;
thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
goto bad;
}
unp2 = sotounpcb(so2);
unp3 = sotounpcb(so3);
if (unp2->unp_addr)
unp3->unp_addr = (struct sockaddr_un *)
dup_sockaddr((struct sockaddr *)
unp2->unp_addr, 1);
so2 = so3;
}
error = unp_connect2(so, so2);
thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
bad:
vput(vp);
thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
return (error);
}
int
unp_connect2(so, so2)
register struct socket *so;
register struct socket *so2;
{
register struct unpcb *unp = sotounpcb(so);
register struct unpcb *unp2;
if (so2->so_type != so->so_type)
return (EPROTOTYPE);
unp2 = sotounpcb(so2);
if (unp == 0 || unp2 == 0)
return (EINVAL);
unp->unp_conn = unp2;
switch (so->so_type) {
case SOCK_DGRAM:
LIST_INSERT_HEAD(&unp2->unp_refs, unp, unp_reflink);
soisconnected(so);
break;
case SOCK_STREAM:
unp2->unp_conn = unp;
soisconnected(so);
soisconnected(so2);
break;
default:
panic("unp_connect2");
}
return (0);
}
static void
unp_disconnect(unp)
struct unpcb *unp;
{
register struct unpcb *unp2 = unp->unp_conn;
if (unp2 == 0)
return;
unp->unp_conn = 0;
switch (unp->unp_socket->so_type) {
case SOCK_DGRAM:
LIST_REMOVE(unp, unp_reflink);
unp->unp_socket->so_state &= ~SS_ISCONNECTED;
break;
case SOCK_STREAM:
soisdisconnected(unp->unp_socket);
unp2->unp_conn = 0;
soisdisconnected(unp2->unp_socket);
break;
}
}
#ifdef notdef
void
unp_abort(unp)
struct unpcb *unp;
{
unp_detach(unp);
}
#endif
static int
unp_pcblist SYSCTL_HANDLER_ARGS
{
int error, i, n;
struct unpcb *unp, **unp_list;
unp_gen_t gencnt;
struct xunpgen xug;
struct unp_head *head;
head = ((intptr_t)arg1 == SOCK_DGRAM ? &unp_dhead : &unp_shead);
if (req->oldptr == 0) {
n = unp_count;
req->oldidx = 2 * (sizeof xug)
+ (n + n/8) * sizeof(struct xunpcb);
return 0;
}
if (req->newptr != 0)
return EPERM;
gencnt = unp_gencnt;
n = unp_count;
xug.xug_len = sizeof xug;
xug.xug_count = n;
xug.xug_gen = gencnt;
xug.xug_sogen = so_gencnt;
error = SYSCTL_OUT(req, &xug, sizeof xug);
if (error)
return error;
if (n == 0)
return 0;
unp_list = _MALLOC(n * sizeof *unp_list, M_TEMP, M_WAITOK);
if (unp_list == 0)
return ENOMEM;
for (unp = head->lh_first, i = 0; unp && i < n;
unp = unp->unp_link.le_next) {
if (unp->unp_gencnt <= gencnt)
unp_list[i++] = unp;
}
n = i;
error = 0;
for (i = 0; i < n; i++) {
unp = unp_list[i];
if (unp->unp_gencnt <= gencnt) {
struct xunpcb xu;
xu.xu_len = sizeof xu;
xu.xu_unpp = unp;
if (unp->unp_addr)
bcopy(unp->unp_addr, &xu.xu_addr,
unp->unp_addr->sun_len);
if (unp->unp_conn && unp->unp_conn->unp_addr)
bcopy(unp->unp_conn->unp_addr,
&xu.xu_caddr,
unp->unp_conn->unp_addr->sun_len);
bcopy(unp, &xu.xu_unp, sizeof *unp);
sotoxsocket(unp->unp_socket, &xu.xu_socket);
error = SYSCTL_OUT(req, &xu, sizeof xu);
}
}
if (!error) {
xug.xug_gen = unp_gencnt;
xug.xug_sogen = so_gencnt;
xug.xug_count = unp_count;
error = SYSCTL_OUT(req, &xug, sizeof xug);
}
FREE(unp_list, M_TEMP);
return error;
}
SYSCTL_PROC(_net_local_dgram, OID_AUTO, pcblist, CTLFLAG_RD,
(caddr_t)(long)SOCK_DGRAM, 0, unp_pcblist, "S,xunpcb",
"List of active local datagram sockets");
SYSCTL_PROC(_net_local_stream, OID_AUTO, pcblist, CTLFLAG_RD,
(caddr_t)(long)SOCK_STREAM, 0, unp_pcblist, "S,xunpcb",
"List of active local stream sockets");
static void
unp_shutdown(unp)
struct unpcb *unp;
{
struct socket *so;
if (unp->unp_socket->so_type == SOCK_STREAM && unp->unp_conn &&
(so = unp->unp_conn->unp_socket))
socantrcvmore(so);
}
static void
unp_drop(unp, errno)
struct unpcb *unp;
int errno;
{
struct socket *so = unp->unp_socket;
so->so_error = errno;
unp_disconnect(unp);
if (so->so_head) {
LIST_REMOVE(unp, unp_link);
unp->unp_gencnt = ++unp_gencnt;
unp_count--;
so->so_pcb = (caddr_t) 0;
if (unp->unp_addr)
FREE(unp->unp_addr, M_SONAME);
zfree(unp_zone, (vm_offset_t)unp);
sofree(so);
}
}
#ifdef notdef
void
unp_drain()
{
}
#endif
int
unp_externalize(rights)
struct mbuf *rights;
{
struct proc *p = current_proc();
register int i;
register struct cmsghdr *cm = mtod(rights, struct cmsghdr *);
register struct file **rp = (struct file **)(cm + 1);
register struct file *fp;
int newfds = (cm->cmsg_len - sizeof(*cm)) / sizeof (int);
int f;
thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
if (!fdavail(p, newfds)) {
for (i = 0; i < newfds; i++) {
fp = *rp;
unp_discard(fp);
*rp++ = 0;
}
thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
return (EMSGSIZE);
}
for (i = 0; i < newfds; i++) {
if (fdalloc(p, 0, &f))
panic("unp_externalize");
fp = *rp;
p->p_fd->fd_ofiles[f] = fp;
*fdflags(p, f) &= ~UF_RESERVED;
fp->f_msgcount--;
unp_rights--;
*(int *)rp++ = f;
}
thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
return (0);
}
void
unp_init(void)
{
unp_zone = zinit(sizeof(struct unpcb),
(nmbclusters * sizeof(struct unpcb)),
4096, "unpzone");
if (unp_zone == 0)
panic("unp_init");
LIST_INIT(&unp_dhead);
LIST_INIT(&unp_shead);
}
#ifndef MIN
#define MIN(a,b) (((a)<(b))?(a):(b))
#endif
static int
unp_internalize(control, p)
struct mbuf *control;
struct proc *p;
{
register struct cmsghdr *cm = mtod(control, struct cmsghdr *);
register struct file **rp;
struct file *fp;
register int i, error;
int oldfds;
thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
if (cm->cmsg_type != SCM_RIGHTS || cm->cmsg_level != SOL_SOCKET ||
cm->cmsg_len != control->m_len) {
thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
return (EINVAL);
}
oldfds = (cm->cmsg_len - sizeof (*cm)) / sizeof (int);
rp = (struct file **)(cm + 1);
for (i = 0; i < oldfds; i++)
if (error = fdgetf(p, *(int *)rp++, 0)) {
thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
return (error);
}
rp = (struct file **)(cm + 1);
for (i = 0; i < oldfds; i++) {
(void) fdgetf(p, *(int *)rp, &fp);
*rp++ = fp;
fref(fp);
fp->f_msgcount++;
unp_rights++;
}
thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
return (0);
}
static int unp_defer, unp_gcing;
static void
unp_gc()
{
register struct file *fp, *nextfp;
register struct socket *so;
struct file **extra_ref, **fpp;
int nunref, i;
if (unp_gcing)
return;
unp_gcing = 1;
unp_defer = 0;
thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next)
fp->f_flag &= ~(FMARK|FDEFER);
do {
for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next) {
if (fcount(fp) == 0)
continue;
if (fp->f_flag & FDEFER) {
fp->f_flag &= ~FDEFER;
unp_defer--;
} else {
if (fp->f_flag & FMARK)
continue;
if (fcount(fp) == fp->f_msgcount)
continue;
fp->f_flag |= FMARK;
}
if (fp->f_type != DTYPE_SOCKET ||
(so = (struct socket *)fp->f_data) == 0)
continue;
if (so->so_proto->pr_domain != &localdomain ||
(so->so_proto->pr_flags&PR_RIGHTS) == 0)
continue;
#ifdef notdef
if (so->so_rcv.sb_flags & SB_LOCK) {
(void) sbwait(&so->so_rcv);
goto restart;
}
#endif
unp_scan(so->so_rcv.sb_mb, unp_mark);
}
} while (unp_defer);
extra_ref = _MALLOC(nfiles * sizeof(struct file *), M_FILE, M_WAITOK);
for (nunref = 0, fp = filehead.lh_first, fpp = extra_ref; fp != 0;
fp = nextfp) {
nextfp = fp->f_list.le_next;
if (fcount(fp) == 0)
continue;
if (fcount(fp) == fp->f_msgcount && !(fp->f_flag & FMARK)) {
*fpp++ = fp;
nunref++;
fref(fp);
}
}
for (i = nunref, fpp = extra_ref; --i >= 0; ++fpp) {
struct file *tfp = *fpp;
if (tfp->f_type == DTYPE_SOCKET && tfp->f_data != NULL) {
thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
sorflush((struct socket *)(tfp->f_data));
thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
}
}
for (i = nunref, fpp = extra_ref; --i >= 0; ++fpp)
closef(*fpp, (struct proc *) NULL);
FREE((caddr_t)extra_ref, M_FILE);
thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
unp_gcing = 0;
}
void
unp_dispose(m)
struct mbuf *m;
{
if (m) {
thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
unp_scan(m, unp_discard);
thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
}
}
static void
unp_scan(m0, op)
register struct mbuf *m0;
void (*op) __P((struct file *));
{
register struct mbuf *m;
register struct file **rp;
register struct cmsghdr *cm;
register int i;
int qfds;
while (m0) {
for (m = m0; m; m = m->m_next)
if (m->m_type == MT_CONTROL &&
m->m_len >= sizeof(*cm)) {
cm = mtod(m, struct cmsghdr *);
if (cm->cmsg_level != SOL_SOCKET ||
cm->cmsg_type != SCM_RIGHTS)
continue;
qfds = (cm->cmsg_len - sizeof *cm)
/ sizeof (struct file *);
rp = (struct file **)(cm + 1);
for (i = 0; i < qfds; i++)
(*op)(*rp++);
break;
}
m0 = m0->m_act;
}
}
static void
unp_mark(fp)
struct file *fp;
{
if (fp->f_flag & FMARK)
return;
unp_defer++;
fp->f_flag |= (FMARK|FDEFER);
}
static void
unp_discard(fp)
struct file *fp;
{
fp->f_msgcount--;
unp_rights--;
(void) closef(fp, (struct proc *)NULL);
}