710c5645af
does the copyin stuff and then calls the second part kern_sendit to do the hard work. Don't bother holding Giant during the copyin phase. The intent of this is to allow the Linux emulator to impliment send* syscalls without using the stackgap.
2079 lines
42 KiB
C
2079 lines
42 KiB
C
/*
|
|
* Copyright (c) 1982, 1986, 1989, 1990, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* sendfile(2) and related extensions:
|
|
* Copyright (c) 1998, David Greenman. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)uipc_syscalls.c 8.4 (Berkeley) 2/21/94
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include "opt_compat.h"
|
|
#include "opt_ktrace.h"
|
|
#include "opt_mac.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/mac.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/sysproto.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/filedesc.h>
|
|
#include <sys/event.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/fcntl.h>
|
|
#include <sys/file.h>
|
|
#include <sys/filio.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/protosw.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/socketvar.h>
|
|
#include <sys/signalvar.h>
|
|
#include <sys/syscallsubr.h>
|
|
#include <sys/uio.h>
|
|
#include <sys/vnode.h>
|
|
#ifdef KTRACE
|
|
#include <sys/ktrace.h>
|
|
#endif
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/vm_object.h>
|
|
#include <vm/vm_page.h>
|
|
#include <vm/vm_pageout.h>
|
|
#include <vm/vm_kern.h>
|
|
#include <vm/vm_extern.h>
|
|
|
|
static void sf_buf_init(void *arg);
|
|
SYSINIT(sock_sf, SI_SUB_MBUF, SI_ORDER_ANY, sf_buf_init, NULL)
|
|
|
|
static int sendit(struct thread *td, int s, struct msghdr *mp, int flags);
|
|
static int recvit(struct thread *td, int s, struct msghdr *mp, void *namelenp);
|
|
|
|
static int accept1(struct thread *td, struct accept_args *uap, int compat);
|
|
static int do_sendfile(struct thread *td, struct sendfile_args *uap, int compat);
|
|
static int getsockname1(struct thread *td, struct getsockname_args *uap,
|
|
int compat);
|
|
static int getpeername1(struct thread *td, struct getpeername_args *uap,
|
|
int compat);
|
|
|
|
/*
|
|
* Expanded sf_freelist head. Really an SLIST_HEAD() in disguise, with the
|
|
* sf_freelist head with the sf_lock mutex.
|
|
*/
|
|
static struct {
|
|
SLIST_HEAD(, sf_buf) sf_head;
|
|
struct mtx sf_lock;
|
|
} sf_freelist;
|
|
|
|
static u_int sf_buf_alloc_want;
|
|
|
|
/*
|
|
* System call interface to the socket abstraction.
|
|
*/
|
|
#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
|
|
#define COMPAT_OLDSOCK
|
|
#endif
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
socket(td, uap)
|
|
struct thread *td;
|
|
register struct socket_args /* {
|
|
int domain;
|
|
int type;
|
|
int protocol;
|
|
} */ *uap;
|
|
{
|
|
struct filedesc *fdp;
|
|
struct socket *so;
|
|
struct file *fp;
|
|
int fd, error;
|
|
|
|
mtx_lock(&Giant);
|
|
fdp = td->td_proc->p_fd;
|
|
error = falloc(td, &fp, &fd);
|
|
if (error)
|
|
goto done2;
|
|
fhold(fp);
|
|
error = socreate(uap->domain, &so, uap->type, uap->protocol,
|
|
td->td_ucred, td);
|
|
FILEDESC_LOCK(fdp);
|
|
if (error) {
|
|
if (fdp->fd_ofiles[fd] == fp) {
|
|
fdp->fd_ofiles[fd] = NULL;
|
|
FILEDESC_UNLOCK(fdp);
|
|
fdrop(fp, td);
|
|
} else
|
|
FILEDESC_UNLOCK(fdp);
|
|
} else {
|
|
fp->f_data = so; /* already has ref count */
|
|
fp->f_flag = FREAD|FWRITE;
|
|
fp->f_ops = &socketops;
|
|
fp->f_type = DTYPE_SOCKET;
|
|
FILEDESC_UNLOCK(fdp);
|
|
td->td_retval[0] = fd;
|
|
}
|
|
fdrop(fp, td);
|
|
done2:
|
|
mtx_unlock(&Giant);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
bind(td, uap)
|
|
struct thread *td;
|
|
register struct bind_args /* {
|
|
int s;
|
|
caddr_t name;
|
|
int namelen;
|
|
} */ *uap;
|
|
{
|
|
struct sockaddr *sa;
|
|
int error;
|
|
|
|
if ((error = getsockaddr(&sa, uap->name, uap->namelen)) != 0)
|
|
return (error);
|
|
|
|
return (kern_bind(td, uap->s, sa));
|
|
}
|
|
|
|
int
|
|
kern_bind(td, fd, sa)
|
|
struct thread *td;
|
|
int fd;
|
|
struct sockaddr *sa;
|
|
{
|
|
struct socket *so;
|
|
int error;
|
|
|
|
mtx_lock(&Giant);
|
|
if ((error = fgetsock(td, fd, &so, NULL)) != 0)
|
|
goto done2;
|
|
#ifdef MAC
|
|
error = mac_check_socket_bind(td->td_ucred, so, sa);
|
|
if (error)
|
|
goto done1;
|
|
#endif
|
|
error = sobind(so, sa, td);
|
|
#ifdef MAC
|
|
done1:
|
|
#endif
|
|
fputsock(so);
|
|
done2:
|
|
mtx_unlock(&Giant);
|
|
FREE(sa, M_SONAME);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
listen(td, uap)
|
|
struct thread *td;
|
|
register struct listen_args /* {
|
|
int s;
|
|
int backlog;
|
|
} */ *uap;
|
|
{
|
|
struct socket *so;
|
|
int error;
|
|
|
|
mtx_lock(&Giant);
|
|
if ((error = fgetsock(td, uap->s, &so, NULL)) == 0) {
|
|
#ifdef MAC
|
|
error = mac_check_socket_listen(td->td_ucred, so);
|
|
if (error)
|
|
goto done;
|
|
#endif
|
|
error = solisten(so, uap->backlog, td);
|
|
#ifdef MAC
|
|
done:
|
|
#endif
|
|
fputsock(so);
|
|
}
|
|
mtx_unlock(&Giant);
|
|
return(error);
|
|
}
|
|
|
|
/*
|
|
* accept1()
|
|
* MPSAFE
|
|
*/
|
|
static int
|
|
accept1(td, uap, compat)
|
|
struct thread *td;
|
|
register struct accept_args /* {
|
|
int s;
|
|
caddr_t name;
|
|
int *anamelen;
|
|
} */ *uap;
|
|
int compat;
|
|
{
|
|
struct filedesc *fdp;
|
|
struct file *nfp = NULL;
|
|
struct sockaddr *sa;
|
|
int namelen, error, s;
|
|
struct socket *head, *so;
|
|
int fd;
|
|
u_int fflag;
|
|
pid_t pgid;
|
|
int tmp;
|
|
|
|
mtx_lock(&Giant);
|
|
fdp = td->td_proc->p_fd;
|
|
if (uap->name) {
|
|
error = copyin(uap->anamelen, &namelen, sizeof (namelen));
|
|
if(error)
|
|
goto done2;
|
|
if (namelen < 0) {
|
|
error = EINVAL;
|
|
goto done2;
|
|
}
|
|
}
|
|
error = fgetsock(td, uap->s, &head, &fflag);
|
|
if (error)
|
|
goto done2;
|
|
s = splnet();
|
|
if ((head->so_options & SO_ACCEPTCONN) == 0) {
|
|
splx(s);
|
|
error = EINVAL;
|
|
goto done;
|
|
}
|
|
while (TAILQ_EMPTY(&head->so_comp) && head->so_error == 0) {
|
|
if (head->so_state & SS_CANTRCVMORE) {
|
|
head->so_error = ECONNABORTED;
|
|
break;
|
|
}
|
|
if ((head->so_state & SS_NBIO) != 0) {
|
|
head->so_error = EWOULDBLOCK;
|
|
break;
|
|
}
|
|
error = tsleep(&head->so_timeo, PSOCK | PCATCH,
|
|
"accept", 0);
|
|
if (error) {
|
|
splx(s);
|
|
goto done;
|
|
}
|
|
}
|
|
if (head->so_error) {
|
|
error = head->so_error;
|
|
head->so_error = 0;
|
|
splx(s);
|
|
goto done;
|
|
}
|
|
|
|
/*
|
|
* At this point we know that there is at least one connection
|
|
* ready to be accepted. Remove it from the queue prior to
|
|
* allocating the file descriptor for it since falloc() may
|
|
* block allowing another process to accept the connection
|
|
* instead.
|
|
*/
|
|
so = TAILQ_FIRST(&head->so_comp);
|
|
TAILQ_REMOVE(&head->so_comp, so, so_list);
|
|
head->so_qlen--;
|
|
|
|
error = falloc(td, &nfp, &fd);
|
|
if (error) {
|
|
/*
|
|
* Probably ran out of file descriptors. Put the
|
|
* unaccepted connection back onto the queue and
|
|
* do another wakeup so some other process might
|
|
* have a chance at it.
|
|
*/
|
|
TAILQ_INSERT_HEAD(&head->so_comp, so, so_list);
|
|
head->so_qlen++;
|
|
wakeup_one(&head->so_timeo);
|
|
splx(s);
|
|
goto done;
|
|
}
|
|
fhold(nfp);
|
|
td->td_retval[0] = fd;
|
|
|
|
/* connection has been removed from the listen queue */
|
|
KNOTE(&head->so_rcv.sb_sel.si_note, 0);
|
|
|
|
so->so_state &= ~SS_COMP;
|
|
so->so_head = NULL;
|
|
pgid = fgetown(&head->so_sigio);
|
|
if (pgid != 0)
|
|
fsetown(pgid, &so->so_sigio);
|
|
|
|
FILE_LOCK(nfp);
|
|
soref(so); /* file descriptor reference */
|
|
nfp->f_data = so; /* nfp has ref count from falloc */
|
|
nfp->f_flag = fflag;
|
|
nfp->f_ops = &socketops;
|
|
nfp->f_type = DTYPE_SOCKET;
|
|
FILE_UNLOCK(nfp);
|
|
/* Sync socket nonblocking/async state with file flags */
|
|
tmp = fflag & FNONBLOCK;
|
|
(void) fo_ioctl(nfp, FIONBIO, &tmp, td->td_ucred, td);
|
|
tmp = fflag & FASYNC;
|
|
(void) fo_ioctl(nfp, FIOASYNC, &tmp, td->td_ucred, td);
|
|
sa = 0;
|
|
error = soaccept(so, &sa);
|
|
if (error) {
|
|
/*
|
|
* return a namelen of zero for older code which might
|
|
* ignore the return value from accept.
|
|
*/
|
|
if (uap->name != NULL) {
|
|
namelen = 0;
|
|
(void) copyout(&namelen,
|
|
uap->anamelen, sizeof(*uap->anamelen));
|
|
}
|
|
goto noconnection;
|
|
}
|
|
if (sa == NULL) {
|
|
namelen = 0;
|
|
if (uap->name)
|
|
goto gotnoname;
|
|
splx(s);
|
|
error = 0;
|
|
goto done;
|
|
}
|
|
if (uap->name) {
|
|
/* check sa_len before it is destroyed */
|
|
if (namelen > sa->sa_len)
|
|
namelen = sa->sa_len;
|
|
#ifdef COMPAT_OLDSOCK
|
|
if (compat)
|
|
((struct osockaddr *)sa)->sa_family =
|
|
sa->sa_family;
|
|
#endif
|
|
error = copyout(sa, uap->name, (u_int)namelen);
|
|
if (!error)
|
|
gotnoname:
|
|
error = copyout(&namelen,
|
|
uap->anamelen, sizeof (*uap->anamelen));
|
|
}
|
|
noconnection:
|
|
if (sa)
|
|
FREE(sa, M_SONAME);
|
|
|
|
/*
|
|
* close the new descriptor, assuming someone hasn't ripped it
|
|
* out from under us.
|
|
*/
|
|
if (error) {
|
|
FILEDESC_LOCK(fdp);
|
|
if (fdp->fd_ofiles[fd] == nfp) {
|
|
fdp->fd_ofiles[fd] = NULL;
|
|
FILEDESC_UNLOCK(fdp);
|
|
fdrop(nfp, td);
|
|
} else {
|
|
FILEDESC_UNLOCK(fdp);
|
|
}
|
|
}
|
|
splx(s);
|
|
|
|
/*
|
|
* Release explicitly held references before returning.
|
|
*/
|
|
done:
|
|
if (nfp != NULL)
|
|
fdrop(nfp, td);
|
|
fputsock(head);
|
|
done2:
|
|
mtx_unlock(&Giant);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* MPSAFE (accept1() is MPSAFE)
|
|
*/
|
|
int
|
|
accept(td, uap)
|
|
struct thread *td;
|
|
struct accept_args *uap;
|
|
{
|
|
|
|
return (accept1(td, uap, 0));
|
|
}
|
|
|
|
#ifdef COMPAT_OLDSOCK
|
|
/*
|
|
* MPSAFE (accept1() is MPSAFE)
|
|
*/
|
|
int
|
|
oaccept(td, uap)
|
|
struct thread *td;
|
|
struct accept_args *uap;
|
|
{
|
|
|
|
return (accept1(td, uap, 1));
|
|
}
|
|
#endif /* COMPAT_OLDSOCK */
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
connect(td, uap)
|
|
struct thread *td;
|
|
register struct connect_args /* {
|
|
int s;
|
|
caddr_t name;
|
|
int namelen;
|
|
} */ *uap;
|
|
{
|
|
struct sockaddr *sa;
|
|
int error;
|
|
|
|
error = getsockaddr(&sa, uap->name, uap->namelen);
|
|
if (error)
|
|
return error;
|
|
|
|
return (kern_connect(td, uap->s, sa));
|
|
}
|
|
|
|
|
|
int
|
|
kern_connect(td, fd, sa)
|
|
struct thread *td;
|
|
int fd;
|
|
struct sockaddr *sa;
|
|
{
|
|
struct socket *so;
|
|
int error, s;
|
|
|
|
mtx_lock(&Giant);
|
|
if ((error = fgetsock(td, fd, &so, NULL)) != 0)
|
|
goto done2;
|
|
if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) {
|
|
error = EALREADY;
|
|
goto done1;
|
|
}
|
|
#ifdef MAC
|
|
error = mac_check_socket_connect(td->td_ucred, so, sa);
|
|
if (error)
|
|
goto bad;
|
|
#endif
|
|
error = soconnect(so, sa, td);
|
|
if (error)
|
|
goto bad;
|
|
if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) {
|
|
error = EINPROGRESS;
|
|
goto done1;
|
|
}
|
|
s = splnet();
|
|
while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
|
|
error = tsleep(&so->so_timeo, PSOCK | PCATCH, "connec", 0);
|
|
if (error)
|
|
break;
|
|
}
|
|
if (error == 0) {
|
|
error = so->so_error;
|
|
so->so_error = 0;
|
|
}
|
|
splx(s);
|
|
bad:
|
|
so->so_state &= ~SS_ISCONNECTING;
|
|
if (error == ERESTART)
|
|
error = EINTR;
|
|
done1:
|
|
fputsock(so);
|
|
done2:
|
|
mtx_unlock(&Giant);
|
|
FREE(sa, M_SONAME);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
socketpair(td, uap)
|
|
struct thread *td;
|
|
register struct socketpair_args /* {
|
|
int domain;
|
|
int type;
|
|
int protocol;
|
|
int *rsv;
|
|
} */ *uap;
|
|
{
|
|
register struct filedesc *fdp = td->td_proc->p_fd;
|
|
struct file *fp1, *fp2;
|
|
struct socket *so1, *so2;
|
|
int fd, error, sv[2];
|
|
|
|
mtx_lock(&Giant);
|
|
error = socreate(uap->domain, &so1, uap->type, uap->protocol,
|
|
td->td_ucred, td);
|
|
if (error)
|
|
goto done2;
|
|
error = socreate(uap->domain, &so2, uap->type, uap->protocol,
|
|
td->td_ucred, td);
|
|
if (error)
|
|
goto free1;
|
|
error = falloc(td, &fp1, &fd);
|
|
if (error)
|
|
goto free2;
|
|
fhold(fp1);
|
|
sv[0] = fd;
|
|
fp1->f_data = so1; /* so1 already has ref count */
|
|
error = falloc(td, &fp2, &fd);
|
|
if (error)
|
|
goto free3;
|
|
fhold(fp2);
|
|
fp2->f_data = so2; /* so2 already has ref count */
|
|
sv[1] = fd;
|
|
error = soconnect2(so1, so2);
|
|
if (error)
|
|
goto free4;
|
|
if (uap->type == SOCK_DGRAM) {
|
|
/*
|
|
* Datagram socket connection is asymmetric.
|
|
*/
|
|
error = soconnect2(so2, so1);
|
|
if (error)
|
|
goto free4;
|
|
}
|
|
FILE_LOCK(fp1);
|
|
fp1->f_flag = FREAD|FWRITE;
|
|
fp1->f_ops = &socketops;
|
|
fp1->f_type = DTYPE_SOCKET;
|
|
FILE_UNLOCK(fp1);
|
|
FILE_LOCK(fp2);
|
|
fp2->f_flag = FREAD|FWRITE;
|
|
fp2->f_ops = &socketops;
|
|
fp2->f_type = DTYPE_SOCKET;
|
|
FILE_UNLOCK(fp2);
|
|
error = copyout(sv, uap->rsv, 2 * sizeof (int));
|
|
fdrop(fp1, td);
|
|
fdrop(fp2, td);
|
|
goto done2;
|
|
free4:
|
|
FILEDESC_LOCK(fdp);
|
|
if (fdp->fd_ofiles[sv[1]] == fp2) {
|
|
fdp->fd_ofiles[sv[1]] = NULL;
|
|
FILEDESC_UNLOCK(fdp);
|
|
fdrop(fp2, td);
|
|
} else
|
|
FILEDESC_UNLOCK(fdp);
|
|
fdrop(fp2, td);
|
|
free3:
|
|
FILEDESC_LOCK(fdp);
|
|
if (fdp->fd_ofiles[sv[0]] == fp1) {
|
|
fdp->fd_ofiles[sv[0]] = NULL;
|
|
FILEDESC_UNLOCK(fdp);
|
|
fdrop(fp1, td);
|
|
} else
|
|
FILEDESC_UNLOCK(fdp);
|
|
fdrop(fp1, td);
|
|
free2:
|
|
(void)soclose(so2);
|
|
free1:
|
|
(void)soclose(so1);
|
|
done2:
|
|
mtx_unlock(&Giant);
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
sendit(td, s, mp, flags)
|
|
register struct thread *td;
|
|
int s;
|
|
register struct msghdr *mp;
|
|
int flags;
|
|
{
|
|
struct mbuf *control;
|
|
struct sockaddr *to;
|
|
int error;
|
|
|
|
if (mp->msg_name != NULL) {
|
|
error = getsockaddr(&to, mp->msg_name, mp->msg_namelen);
|
|
if (error)
|
|
return error;
|
|
mp->msg_name = to;
|
|
} else
|
|
to = NULL;
|
|
|
|
if (mp->msg_control) {
|
|
if (mp->msg_controllen < sizeof(struct cmsghdr)
|
|
#ifdef COMPAT_OLDSOCK
|
|
&& mp->msg_flags != MSG_COMPAT
|
|
#endif
|
|
) {
|
|
error = EINVAL;
|
|
goto bad;
|
|
}
|
|
error = sockargs(&control, mp->msg_control,
|
|
mp->msg_controllen, MT_CONTROL);
|
|
if (error)
|
|
goto bad;
|
|
#ifdef COMPAT_OLDSOCK
|
|
if (mp->msg_flags == MSG_COMPAT) {
|
|
register struct cmsghdr *cm;
|
|
|
|
M_PREPEND(control, sizeof(*cm), M_TRYWAIT);
|
|
if (control == 0) {
|
|
error = ENOBUFS;
|
|
goto bad;
|
|
} else {
|
|
cm = mtod(control, struct cmsghdr *);
|
|
cm->cmsg_len = control->m_len;
|
|
cm->cmsg_level = SOL_SOCKET;
|
|
cm->cmsg_type = SCM_RIGHTS;
|
|
}
|
|
}
|
|
#endif
|
|
} else {
|
|
control = NULL;
|
|
}
|
|
|
|
error = kern_sendit(td, s, mp, flags, control);
|
|
|
|
bad:
|
|
if (to)
|
|
FREE(to, M_SONAME);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
kern_sendit(td, s, mp, flags, control)
|
|
struct thread *td;
|
|
int s;
|
|
struct msghdr *mp;
|
|
int flags;
|
|
struct mbuf *control;
|
|
{
|
|
struct uio auio;
|
|
struct iovec *iov;
|
|
struct socket *so;
|
|
int i;
|
|
int len, error;
|
|
#ifdef KTRACE
|
|
struct iovec *ktriov = NULL;
|
|
struct uio ktruio;
|
|
int iovlen;
|
|
#endif
|
|
|
|
mtx_lock(&Giant);
|
|
if ((error = fgetsock(td, s, &so, NULL)) != 0)
|
|
goto bad2;
|
|
|
|
#ifdef MAC
|
|
error = mac_check_socket_send(td->td_ucred, so);
|
|
if (error)
|
|
goto bad;
|
|
#endif
|
|
|
|
auio.uio_iov = mp->msg_iov;
|
|
auio.uio_iovcnt = mp->msg_iovlen;
|
|
auio.uio_segflg = UIO_USERSPACE;
|
|
auio.uio_rw = UIO_WRITE;
|
|
auio.uio_td = td;
|
|
auio.uio_offset = 0; /* XXX */
|
|
auio.uio_resid = 0;
|
|
iov = mp->msg_iov;
|
|
for (i = 0; i < mp->msg_iovlen; i++, iov++) {
|
|
if ((auio.uio_resid += iov->iov_len) < 0) {
|
|
error = EINVAL;
|
|
goto bad;
|
|
}
|
|
}
|
|
#ifdef KTRACE
|
|
if (KTRPOINT(td, KTR_GENIO)) {
|
|
iovlen = auio.uio_iovcnt * sizeof (struct iovec);
|
|
MALLOC(ktriov, struct iovec *, iovlen, M_TEMP, M_WAITOK);
|
|
bcopy(auio.uio_iov, ktriov, iovlen);
|
|
ktruio = auio;
|
|
}
|
|
#endif
|
|
len = auio.uio_resid;
|
|
error = so->so_proto->pr_usrreqs->pru_sosend(so, mp->msg_name, &auio,
|
|
0, control, flags, td);
|
|
if (error) {
|
|
if (auio.uio_resid != len && (error == ERESTART ||
|
|
error == EINTR || error == EWOULDBLOCK))
|
|
error = 0;
|
|
/* Generation of SIGPIPE can be controlled per socket */
|
|
if (error == EPIPE && !(so->so_options & SO_NOSIGPIPE)) {
|
|
PROC_LOCK(td->td_proc);
|
|
psignal(td->td_proc, SIGPIPE);
|
|
PROC_UNLOCK(td->td_proc);
|
|
}
|
|
}
|
|
if (error == 0)
|
|
td->td_retval[0] = len - auio.uio_resid;
|
|
#ifdef KTRACE
|
|
if (ktriov != NULL) {
|
|
if (error == 0) {
|
|
ktruio.uio_iov = ktriov;
|
|
ktruio.uio_resid = td->td_retval[0];
|
|
ktrgenio(s, UIO_WRITE, &ktruio, error);
|
|
}
|
|
FREE(ktriov, M_TEMP);
|
|
}
|
|
#endif
|
|
bad:
|
|
fputsock(so);
|
|
bad2:
|
|
mtx_unlock(&Giant);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
sendto(td, uap)
|
|
struct thread *td;
|
|
register struct sendto_args /* {
|
|
int s;
|
|
caddr_t buf;
|
|
size_t len;
|
|
int flags;
|
|
caddr_t to;
|
|
int tolen;
|
|
} */ *uap;
|
|
{
|
|
struct msghdr msg;
|
|
struct iovec aiov;
|
|
int error;
|
|
|
|
msg.msg_name = uap->to;
|
|
msg.msg_namelen = uap->tolen;
|
|
msg.msg_iov = &aiov;
|
|
msg.msg_iovlen = 1;
|
|
msg.msg_control = 0;
|
|
#ifdef COMPAT_OLDSOCK
|
|
msg.msg_flags = 0;
|
|
#endif
|
|
aiov.iov_base = uap->buf;
|
|
aiov.iov_len = uap->len;
|
|
error = sendit(td, uap->s, &msg, uap->flags);
|
|
return (error);
|
|
}
|
|
|
|
#ifdef COMPAT_OLDSOCK
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
osend(td, uap)
|
|
struct thread *td;
|
|
register struct osend_args /* {
|
|
int s;
|
|
caddr_t buf;
|
|
int len;
|
|
int flags;
|
|
} */ *uap;
|
|
{
|
|
struct msghdr msg;
|
|
struct iovec aiov;
|
|
int error;
|
|
|
|
msg.msg_name = 0;
|
|
msg.msg_namelen = 0;
|
|
msg.msg_iov = &aiov;
|
|
msg.msg_iovlen = 1;
|
|
aiov.iov_base = uap->buf;
|
|
aiov.iov_len = uap->len;
|
|
msg.msg_control = 0;
|
|
msg.msg_flags = 0;
|
|
error = sendit(td, uap->s, &msg, uap->flags);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
osendmsg(td, uap)
|
|
struct thread *td;
|
|
register struct osendmsg_args /* {
|
|
int s;
|
|
caddr_t msg;
|
|
int flags;
|
|
} */ *uap;
|
|
{
|
|
struct msghdr msg;
|
|
struct iovec aiov[UIO_SMALLIOV], *iov;
|
|
int error;
|
|
|
|
error = copyin(uap->msg, &msg, sizeof (struct omsghdr));
|
|
if (error)
|
|
goto done2;
|
|
if ((u_int)msg.msg_iovlen >= UIO_SMALLIOV) {
|
|
if ((u_int)msg.msg_iovlen >= UIO_MAXIOV) {
|
|
error = EMSGSIZE;
|
|
goto done2;
|
|
}
|
|
MALLOC(iov, struct iovec *,
|
|
sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV,
|
|
M_WAITOK);
|
|
} else {
|
|
iov = aiov;
|
|
}
|
|
error = copyin(msg.msg_iov, iov,
|
|
(unsigned)(msg.msg_iovlen * sizeof (struct iovec)));
|
|
if (error)
|
|
goto done;
|
|
msg.msg_flags = MSG_COMPAT;
|
|
msg.msg_iov = iov;
|
|
error = sendit(td, uap->s, &msg, uap->flags);
|
|
done:
|
|
if (iov != aiov)
|
|
FREE(iov, M_IOV);
|
|
done2:
|
|
return (error);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
sendmsg(td, uap)
|
|
struct thread *td;
|
|
register struct sendmsg_args /* {
|
|
int s;
|
|
caddr_t msg;
|
|
int flags;
|
|
} */ *uap;
|
|
{
|
|
struct msghdr msg;
|
|
struct iovec aiov[UIO_SMALLIOV], *iov;
|
|
int error;
|
|
|
|
error = copyin(uap->msg, &msg, sizeof (msg));
|
|
if (error)
|
|
goto done2;
|
|
if ((u_int)msg.msg_iovlen >= UIO_SMALLIOV) {
|
|
if ((u_int)msg.msg_iovlen >= UIO_MAXIOV) {
|
|
error = EMSGSIZE;
|
|
goto done2;
|
|
}
|
|
MALLOC(iov, struct iovec *,
|
|
sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV,
|
|
M_WAITOK);
|
|
} else {
|
|
iov = aiov;
|
|
}
|
|
if (msg.msg_iovlen &&
|
|
(error = copyin(msg.msg_iov, iov,
|
|
(unsigned)(msg.msg_iovlen * sizeof (struct iovec)))))
|
|
goto done;
|
|
msg.msg_iov = iov;
|
|
#ifdef COMPAT_OLDSOCK
|
|
msg.msg_flags = 0;
|
|
#endif
|
|
error = sendit(td, uap->s, &msg, uap->flags);
|
|
done:
|
|
if (iov != aiov)
|
|
FREE(iov, M_IOV);
|
|
done2:
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
recvit(td, s, mp, namelenp)
|
|
register struct thread *td;
|
|
int s;
|
|
register struct msghdr *mp;
|
|
void *namelenp;
|
|
{
|
|
struct uio auio;
|
|
register struct iovec *iov;
|
|
register int i;
|
|
int len, error;
|
|
struct mbuf *m, *control = 0;
|
|
caddr_t ctlbuf;
|
|
struct socket *so;
|
|
struct sockaddr *fromsa = 0;
|
|
#ifdef KTRACE
|
|
struct iovec *ktriov = NULL;
|
|
struct uio ktruio;
|
|
int iovlen;
|
|
#endif
|
|
|
|
if ((error = fgetsock(td, s, &so, NULL)) != 0)
|
|
return (error);
|
|
|
|
#ifdef MAC
|
|
error = mac_check_socket_receive(td->td_ucred, so);
|
|
if (error) {
|
|
fputsock(so);
|
|
return (error);
|
|
}
|
|
#endif
|
|
|
|
auio.uio_iov = mp->msg_iov;
|
|
auio.uio_iovcnt = mp->msg_iovlen;
|
|
auio.uio_segflg = UIO_USERSPACE;
|
|
auio.uio_rw = UIO_READ;
|
|
auio.uio_td = td;
|
|
auio.uio_offset = 0; /* XXX */
|
|
auio.uio_resid = 0;
|
|
iov = mp->msg_iov;
|
|
for (i = 0; i < mp->msg_iovlen; i++, iov++) {
|
|
if ((auio.uio_resid += iov->iov_len) < 0) {
|
|
fputsock(so);
|
|
return (EINVAL);
|
|
}
|
|
}
|
|
#ifdef KTRACE
|
|
if (KTRPOINT(td, KTR_GENIO)) {
|
|
iovlen = auio.uio_iovcnt * sizeof (struct iovec);
|
|
MALLOC(ktriov, struct iovec *, iovlen, M_TEMP, M_WAITOK);
|
|
bcopy(auio.uio_iov, ktriov, iovlen);
|
|
ktruio = auio;
|
|
}
|
|
#endif
|
|
len = auio.uio_resid;
|
|
error = so->so_proto->pr_usrreqs->pru_soreceive(so, &fromsa, &auio,
|
|
(struct mbuf **)0, mp->msg_control ? &control : (struct mbuf **)0,
|
|
&mp->msg_flags);
|
|
if (error) {
|
|
if (auio.uio_resid != len && (error == ERESTART ||
|
|
error == EINTR || error == EWOULDBLOCK))
|
|
error = 0;
|
|
}
|
|
#ifdef KTRACE
|
|
if (ktriov != NULL) {
|
|
if (error == 0) {
|
|
ktruio.uio_iov = ktriov;
|
|
ktruio.uio_resid = len - auio.uio_resid;
|
|
ktrgenio(s, UIO_READ, &ktruio, error);
|
|
}
|
|
FREE(ktriov, M_TEMP);
|
|
}
|
|
#endif
|
|
if (error)
|
|
goto out;
|
|
td->td_retval[0] = len - auio.uio_resid;
|
|
if (mp->msg_name) {
|
|
len = mp->msg_namelen;
|
|
if (len <= 0 || fromsa == 0)
|
|
len = 0;
|
|
else {
|
|
/* save sa_len before it is destroyed by MSG_COMPAT */
|
|
len = MIN(len, fromsa->sa_len);
|
|
#ifdef COMPAT_OLDSOCK
|
|
if (mp->msg_flags & MSG_COMPAT)
|
|
((struct osockaddr *)fromsa)->sa_family =
|
|
fromsa->sa_family;
|
|
#endif
|
|
error = copyout(fromsa, mp->msg_name, (unsigned)len);
|
|
if (error)
|
|
goto out;
|
|
}
|
|
mp->msg_namelen = len;
|
|
if (namelenp &&
|
|
(error = copyout(&len, namelenp, sizeof (int)))) {
|
|
#ifdef COMPAT_OLDSOCK
|
|
if (mp->msg_flags & MSG_COMPAT)
|
|
error = 0; /* old recvfrom didn't check */
|
|
else
|
|
#endif
|
|
goto out;
|
|
}
|
|
}
|
|
if (mp->msg_control) {
|
|
#ifdef COMPAT_OLDSOCK
|
|
/*
|
|
* We assume that old recvmsg calls won't receive access
|
|
* rights and other control info, esp. as control info
|
|
* is always optional and those options didn't exist in 4.3.
|
|
* If we receive rights, trim the cmsghdr; anything else
|
|
* is tossed.
|
|
*/
|
|
if (control && mp->msg_flags & MSG_COMPAT) {
|
|
if (mtod(control, struct cmsghdr *)->cmsg_level !=
|
|
SOL_SOCKET ||
|
|
mtod(control, struct cmsghdr *)->cmsg_type !=
|
|
SCM_RIGHTS) {
|
|
mp->msg_controllen = 0;
|
|
goto out;
|
|
}
|
|
control->m_len -= sizeof (struct cmsghdr);
|
|
control->m_data += sizeof (struct cmsghdr);
|
|
}
|
|
#endif
|
|
len = mp->msg_controllen;
|
|
m = control;
|
|
mp->msg_controllen = 0;
|
|
ctlbuf = mp->msg_control;
|
|
|
|
while (m && len > 0) {
|
|
unsigned int tocopy;
|
|
|
|
if (len >= m->m_len)
|
|
tocopy = m->m_len;
|
|
else {
|
|
mp->msg_flags |= MSG_CTRUNC;
|
|
tocopy = len;
|
|
}
|
|
|
|
if ((error = copyout(mtod(m, caddr_t),
|
|
ctlbuf, tocopy)) != 0)
|
|
goto out;
|
|
|
|
ctlbuf += tocopy;
|
|
len -= tocopy;
|
|
m = m->m_next;
|
|
}
|
|
mp->msg_controllen = ctlbuf - (caddr_t)mp->msg_control;
|
|
}
|
|
out:
|
|
fputsock(so);
|
|
if (fromsa)
|
|
FREE(fromsa, M_SONAME);
|
|
if (control)
|
|
m_freem(control);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
recvfrom(td, uap)
|
|
struct thread *td;
|
|
register struct recvfrom_args /* {
|
|
int s;
|
|
caddr_t buf;
|
|
size_t len;
|
|
int flags;
|
|
caddr_t from;
|
|
int *fromlenaddr;
|
|
} */ *uap;
|
|
{
|
|
struct msghdr msg;
|
|
struct iovec aiov;
|
|
int error;
|
|
|
|
mtx_lock(&Giant);
|
|
if (uap->fromlenaddr) {
|
|
error = copyin(uap->fromlenaddr,
|
|
&msg.msg_namelen, sizeof (msg.msg_namelen));
|
|
if (error)
|
|
goto done2;
|
|
} else {
|
|
msg.msg_namelen = 0;
|
|
}
|
|
msg.msg_name = uap->from;
|
|
msg.msg_iov = &aiov;
|
|
msg.msg_iovlen = 1;
|
|
aiov.iov_base = uap->buf;
|
|
aiov.iov_len = uap->len;
|
|
msg.msg_control = 0;
|
|
msg.msg_flags = uap->flags;
|
|
error = recvit(td, uap->s, &msg, uap->fromlenaddr);
|
|
done2:
|
|
mtx_unlock(&Giant);
|
|
return(error);
|
|
}
|
|
|
|
#ifdef COMPAT_OLDSOCK
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
orecvfrom(td, uap)
|
|
struct thread *td;
|
|
struct recvfrom_args *uap;
|
|
{
|
|
|
|
uap->flags |= MSG_COMPAT;
|
|
return (recvfrom(td, uap));
|
|
}
|
|
#endif
|
|
|
|
|
|
#ifdef COMPAT_OLDSOCK
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
orecv(td, uap)
|
|
struct thread *td;
|
|
register struct orecv_args /* {
|
|
int s;
|
|
caddr_t buf;
|
|
int len;
|
|
int flags;
|
|
} */ *uap;
|
|
{
|
|
struct msghdr msg;
|
|
struct iovec aiov;
|
|
int error;
|
|
|
|
mtx_lock(&Giant);
|
|
msg.msg_name = 0;
|
|
msg.msg_namelen = 0;
|
|
msg.msg_iov = &aiov;
|
|
msg.msg_iovlen = 1;
|
|
aiov.iov_base = uap->buf;
|
|
aiov.iov_len = uap->len;
|
|
msg.msg_control = 0;
|
|
msg.msg_flags = uap->flags;
|
|
error = recvit(td, uap->s, &msg, NULL);
|
|
mtx_unlock(&Giant);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Old recvmsg. This code takes advantage of the fact that the old msghdr
|
|
* overlays the new one, missing only the flags, and with the (old) access
|
|
* rights where the control fields are now.
|
|
*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
orecvmsg(td, uap)
|
|
struct thread *td;
|
|
register struct orecvmsg_args /* {
|
|
int s;
|
|
struct omsghdr *msg;
|
|
int flags;
|
|
} */ *uap;
|
|
{
|
|
struct msghdr msg;
|
|
struct iovec aiov[UIO_SMALLIOV], *iov;
|
|
int error;
|
|
|
|
error = copyin(uap->msg, &msg, sizeof (struct omsghdr));
|
|
if (error)
|
|
return (error);
|
|
|
|
mtx_lock(&Giant);
|
|
if ((u_int)msg.msg_iovlen >= UIO_SMALLIOV) {
|
|
if ((u_int)msg.msg_iovlen >= UIO_MAXIOV) {
|
|
error = EMSGSIZE;
|
|
goto done2;
|
|
}
|
|
MALLOC(iov, struct iovec *,
|
|
sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV,
|
|
M_WAITOK);
|
|
} else {
|
|
iov = aiov;
|
|
}
|
|
msg.msg_flags = uap->flags | MSG_COMPAT;
|
|
error = copyin(msg.msg_iov, iov,
|
|
(unsigned)(msg.msg_iovlen * sizeof (struct iovec)));
|
|
if (error)
|
|
goto done;
|
|
msg.msg_iov = iov;
|
|
error = recvit(td, uap->s, &msg, &uap->msg->msg_namelen);
|
|
|
|
if (msg.msg_controllen && error == 0)
|
|
error = copyout(&msg.msg_controllen,
|
|
&uap->msg->msg_accrightslen, sizeof (int));
|
|
done:
|
|
if (iov != aiov)
|
|
FREE(iov, M_IOV);
|
|
done2:
|
|
mtx_unlock(&Giant);
|
|
return (error);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
recvmsg(td, uap)
|
|
struct thread *td;
|
|
register struct recvmsg_args /* {
|
|
int s;
|
|
struct msghdr *msg;
|
|
int flags;
|
|
} */ *uap;
|
|
{
|
|
struct msghdr msg;
|
|
struct iovec aiov[UIO_SMALLIOV], *uiov, *iov;
|
|
register int error;
|
|
|
|
mtx_lock(&Giant);
|
|
error = copyin(uap->msg, &msg, sizeof (msg));
|
|
if (error)
|
|
goto done2;
|
|
if ((u_int)msg.msg_iovlen >= UIO_SMALLIOV) {
|
|
if ((u_int)msg.msg_iovlen >= UIO_MAXIOV) {
|
|
error = EMSGSIZE;
|
|
goto done2;
|
|
}
|
|
MALLOC(iov, struct iovec *,
|
|
sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV,
|
|
M_WAITOK);
|
|
} else {
|
|
iov = aiov;
|
|
}
|
|
#ifdef COMPAT_OLDSOCK
|
|
msg.msg_flags = uap->flags &~ MSG_COMPAT;
|
|
#else
|
|
msg.msg_flags = uap->flags;
|
|
#endif
|
|
uiov = msg.msg_iov;
|
|
msg.msg_iov = iov;
|
|
error = copyin(uiov, iov,
|
|
(unsigned)(msg.msg_iovlen * sizeof (struct iovec)));
|
|
if (error)
|
|
goto done;
|
|
error = recvit(td, uap->s, &msg, NULL);
|
|
if (!error) {
|
|
msg.msg_iov = uiov;
|
|
error = copyout(&msg, uap->msg, sizeof(msg));
|
|
}
|
|
done:
|
|
if (iov != aiov)
|
|
FREE(iov, M_IOV);
|
|
done2:
|
|
mtx_unlock(&Giant);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
shutdown(td, uap)
|
|
struct thread *td;
|
|
register struct shutdown_args /* {
|
|
int s;
|
|
int how;
|
|
} */ *uap;
|
|
{
|
|
struct socket *so;
|
|
int error;
|
|
|
|
mtx_lock(&Giant);
|
|
if ((error = fgetsock(td, uap->s, &so, NULL)) == 0) {
|
|
error = soshutdown(so, uap->how);
|
|
fputsock(so);
|
|
}
|
|
mtx_unlock(&Giant);
|
|
return(error);
|
|
}
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
setsockopt(td, uap)
|
|
struct thread *td;
|
|
register struct setsockopt_args /* {
|
|
int s;
|
|
int level;
|
|
int name;
|
|
caddr_t val;
|
|
int valsize;
|
|
} */ *uap;
|
|
{
|
|
struct socket *so;
|
|
struct sockopt sopt;
|
|
int error;
|
|
|
|
if (uap->val == 0 && uap->valsize != 0)
|
|
return (EFAULT);
|
|
if (uap->valsize < 0)
|
|
return (EINVAL);
|
|
|
|
mtx_lock(&Giant);
|
|
if ((error = fgetsock(td, uap->s, &so, NULL)) == 0) {
|
|
sopt.sopt_dir = SOPT_SET;
|
|
sopt.sopt_level = uap->level;
|
|
sopt.sopt_name = uap->name;
|
|
sopt.sopt_val = uap->val;
|
|
sopt.sopt_valsize = uap->valsize;
|
|
sopt.sopt_td = td;
|
|
error = sosetopt(so, &sopt);
|
|
fputsock(so);
|
|
}
|
|
mtx_unlock(&Giant);
|
|
return(error);
|
|
}
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
getsockopt(td, uap)
|
|
struct thread *td;
|
|
register struct getsockopt_args /* {
|
|
int s;
|
|
int level;
|
|
int name;
|
|
caddr_t val;
|
|
int *avalsize;
|
|
} */ *uap;
|
|
{
|
|
int valsize, error;
|
|
struct socket *so;
|
|
struct sockopt sopt;
|
|
|
|
mtx_lock(&Giant);
|
|
if ((error = fgetsock(td, uap->s, &so, NULL)) != 0)
|
|
goto done2;
|
|
if (uap->val) {
|
|
error = copyin(uap->avalsize, &valsize, sizeof (valsize));
|
|
if (error)
|
|
goto done1;
|
|
if (valsize < 0) {
|
|
error = EINVAL;
|
|
goto done1;
|
|
}
|
|
} else {
|
|
valsize = 0;
|
|
}
|
|
|
|
sopt.sopt_dir = SOPT_GET;
|
|
sopt.sopt_level = uap->level;
|
|
sopt.sopt_name = uap->name;
|
|
sopt.sopt_val = uap->val;
|
|
sopt.sopt_valsize = (size_t)valsize; /* checked non-negative above */
|
|
sopt.sopt_td = td;
|
|
|
|
error = sogetopt(so, &sopt);
|
|
if (error == 0) {
|
|
valsize = sopt.sopt_valsize;
|
|
error = copyout(&valsize, uap->avalsize, sizeof (valsize));
|
|
}
|
|
done1:
|
|
fputsock(so);
|
|
done2:
|
|
mtx_unlock(&Giant);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* getsockname1() - Get socket name.
|
|
*
|
|
* MPSAFE
|
|
*/
|
|
/* ARGSUSED */
|
|
static int
|
|
getsockname1(td, uap, compat)
|
|
struct thread *td;
|
|
register struct getsockname_args /* {
|
|
int fdes;
|
|
caddr_t asa;
|
|
int *alen;
|
|
} */ *uap;
|
|
int compat;
|
|
{
|
|
struct socket *so;
|
|
struct sockaddr *sa;
|
|
int len, error;
|
|
|
|
mtx_lock(&Giant);
|
|
if ((error = fgetsock(td, uap->fdes, &so, NULL)) != 0)
|
|
goto done2;
|
|
error = copyin(uap->alen, &len, sizeof (len));
|
|
if (error)
|
|
goto done1;
|
|
if (len < 0) {
|
|
error = EINVAL;
|
|
goto done1;
|
|
}
|
|
sa = 0;
|
|
error = (*so->so_proto->pr_usrreqs->pru_sockaddr)(so, &sa);
|
|
if (error)
|
|
goto bad;
|
|
if (sa == 0) {
|
|
len = 0;
|
|
goto gotnothing;
|
|
}
|
|
|
|
len = MIN(len, sa->sa_len);
|
|
#ifdef COMPAT_OLDSOCK
|
|
if (compat)
|
|
((struct osockaddr *)sa)->sa_family = sa->sa_family;
|
|
#endif
|
|
error = copyout(sa, uap->asa, (u_int)len);
|
|
if (error == 0)
|
|
gotnothing:
|
|
error = copyout(&len, uap->alen, sizeof (len));
|
|
bad:
|
|
if (sa)
|
|
FREE(sa, M_SONAME);
|
|
done1:
|
|
fputsock(so);
|
|
done2:
|
|
mtx_unlock(&Giant);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
getsockname(td, uap)
|
|
struct thread *td;
|
|
struct getsockname_args *uap;
|
|
{
|
|
|
|
return (getsockname1(td, uap, 0));
|
|
}
|
|
|
|
#ifdef COMPAT_OLDSOCK
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
ogetsockname(td, uap)
|
|
struct thread *td;
|
|
struct getsockname_args *uap;
|
|
{
|
|
|
|
return (getsockname1(td, uap, 1));
|
|
}
|
|
#endif /* COMPAT_OLDSOCK */
|
|
|
|
/*
|
|
* getpeername1() - Get name of peer for connected socket.
|
|
*
|
|
* MPSAFE
|
|
*/
|
|
/* ARGSUSED */
|
|
static int
|
|
getpeername1(td, uap, compat)
|
|
struct thread *td;
|
|
register struct getpeername_args /* {
|
|
int fdes;
|
|
caddr_t asa;
|
|
int *alen;
|
|
} */ *uap;
|
|
int compat;
|
|
{
|
|
struct socket *so;
|
|
struct sockaddr *sa;
|
|
int len, error;
|
|
|
|
mtx_lock(&Giant);
|
|
if ((error = fgetsock(td, uap->fdes, &so, NULL)) != 0)
|
|
goto done2;
|
|
if ((so->so_state & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0) {
|
|
error = ENOTCONN;
|
|
goto done1;
|
|
}
|
|
error = copyin(uap->alen, &len, sizeof (len));
|
|
if (error)
|
|
goto done1;
|
|
if (len < 0) {
|
|
error = EINVAL;
|
|
goto done1;
|
|
}
|
|
sa = 0;
|
|
error = (*so->so_proto->pr_usrreqs->pru_peeraddr)(so, &sa);
|
|
if (error)
|
|
goto bad;
|
|
if (sa == 0) {
|
|
len = 0;
|
|
goto gotnothing;
|
|
}
|
|
len = MIN(len, sa->sa_len);
|
|
#ifdef COMPAT_OLDSOCK
|
|
if (compat)
|
|
((struct osockaddr *)sa)->sa_family =
|
|
sa->sa_family;
|
|
#endif
|
|
error = copyout(sa, uap->asa, (u_int)len);
|
|
if (error)
|
|
goto bad;
|
|
gotnothing:
|
|
error = copyout(&len, uap->alen, sizeof (len));
|
|
bad:
|
|
if (sa)
|
|
FREE(sa, M_SONAME);
|
|
done1:
|
|
fputsock(so);
|
|
done2:
|
|
mtx_unlock(&Giant);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
getpeername(td, uap)
|
|
struct thread *td;
|
|
struct getpeername_args *uap;
|
|
{
|
|
|
|
return (getpeername1(td, uap, 0));
|
|
}
|
|
|
|
#ifdef COMPAT_OLDSOCK
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
ogetpeername(td, uap)
|
|
struct thread *td;
|
|
struct ogetpeername_args *uap;
|
|
{
|
|
|
|
/* XXX uap should have type `getpeername_args *' to begin with. */
|
|
return (getpeername1(td, (struct getpeername_args *)uap, 1));
|
|
}
|
|
#endif /* COMPAT_OLDSOCK */
|
|
|
|
int
|
|
sockargs(mp, buf, buflen, type)
|
|
struct mbuf **mp;
|
|
caddr_t buf;
|
|
int buflen, type;
|
|
{
|
|
register struct sockaddr *sa;
|
|
register struct mbuf *m;
|
|
int error;
|
|
|
|
if ((u_int)buflen > MLEN) {
|
|
#ifdef COMPAT_OLDSOCK
|
|
if (type == MT_SONAME && (u_int)buflen <= 112)
|
|
buflen = MLEN; /* unix domain compat. hack */
|
|
else
|
|
#endif
|
|
return (EINVAL);
|
|
}
|
|
m = m_get(M_TRYWAIT, type);
|
|
if (m == NULL)
|
|
return (ENOBUFS);
|
|
m->m_len = buflen;
|
|
error = copyin(buf, mtod(m, caddr_t), (u_int)buflen);
|
|
if (error)
|
|
(void) m_free(m);
|
|
else {
|
|
*mp = m;
|
|
if (type == MT_SONAME) {
|
|
sa = mtod(m, struct sockaddr *);
|
|
|
|
#if defined(COMPAT_OLDSOCK) && BYTE_ORDER != BIG_ENDIAN
|
|
if (sa->sa_family == 0 && sa->sa_len < AF_MAX)
|
|
sa->sa_family = sa->sa_len;
|
|
#endif
|
|
sa->sa_len = buflen;
|
|
}
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
getsockaddr(namp, uaddr, len)
|
|
struct sockaddr **namp;
|
|
caddr_t uaddr;
|
|
size_t len;
|
|
{
|
|
struct sockaddr *sa;
|
|
int error;
|
|
|
|
if (len > SOCK_MAXADDRLEN)
|
|
return ENAMETOOLONG;
|
|
MALLOC(sa, struct sockaddr *, len, M_SONAME, M_WAITOK);
|
|
error = copyin(uaddr, sa, len);
|
|
if (error) {
|
|
FREE(sa, M_SONAME);
|
|
} else {
|
|
#if defined(COMPAT_OLDSOCK) && BYTE_ORDER != BIG_ENDIAN
|
|
if (sa->sa_family == 0 && sa->sa_len < AF_MAX)
|
|
sa->sa_family = sa->sa_len;
|
|
#endif
|
|
sa->sa_len = len;
|
|
*namp = sa;
|
|
}
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Allocate a pool of sf_bufs (sendfile(2) or "super-fast" if you prefer. :-))
|
|
*/
|
|
static void
|
|
sf_buf_init(void *arg)
|
|
{
|
|
struct sf_buf *sf_bufs;
|
|
vm_offset_t sf_base;
|
|
int i;
|
|
|
|
mtx_init(&sf_freelist.sf_lock, "sf_bufs list lock", NULL, MTX_DEF);
|
|
mtx_lock(&sf_freelist.sf_lock);
|
|
SLIST_INIT(&sf_freelist.sf_head);
|
|
sf_base = kmem_alloc_pageable(kernel_map, nsfbufs * PAGE_SIZE);
|
|
sf_bufs = malloc(nsfbufs * sizeof(struct sf_buf), M_TEMP,
|
|
M_NOWAIT | M_ZERO);
|
|
for (i = 0; i < nsfbufs; i++) {
|
|
sf_bufs[i].kva = sf_base + i * PAGE_SIZE;
|
|
SLIST_INSERT_HEAD(&sf_freelist.sf_head, &sf_bufs[i], free_list);
|
|
}
|
|
sf_buf_alloc_want = 0;
|
|
mtx_unlock(&sf_freelist.sf_lock);
|
|
}
|
|
|
|
/*
|
|
* Get an sf_buf from the freelist. Will block if none are available.
|
|
*/
|
|
struct sf_buf *
|
|
sf_buf_alloc(struct vm_page *m)
|
|
{
|
|
struct sf_buf *sf;
|
|
int error;
|
|
|
|
mtx_lock(&sf_freelist.sf_lock);
|
|
while ((sf = SLIST_FIRST(&sf_freelist.sf_head)) == NULL) {
|
|
sf_buf_alloc_want++;
|
|
error = msleep(&sf_freelist, &sf_freelist.sf_lock, PVM|PCATCH,
|
|
"sfbufa", 0);
|
|
sf_buf_alloc_want--;
|
|
|
|
/*
|
|
* If we got a signal, don't risk going back to sleep.
|
|
*/
|
|
if (error)
|
|
break;
|
|
}
|
|
if (sf != NULL) {
|
|
SLIST_REMOVE_HEAD(&sf_freelist.sf_head, free_list);
|
|
sf->m = m;
|
|
pmap_qenter(sf->kva, &sf->m, 1);
|
|
}
|
|
mtx_unlock(&sf_freelist.sf_lock);
|
|
return (sf);
|
|
}
|
|
|
|
/*
|
|
* Detatch mapped page and release resources back to the system.
|
|
*/
|
|
void
|
|
sf_buf_free(void *addr, void *args)
|
|
{
|
|
struct sf_buf *sf;
|
|
struct vm_page *m;
|
|
|
|
sf = args;
|
|
pmap_qremove((vm_offset_t)addr, 1);
|
|
m = sf->m;
|
|
vm_page_lock_queues();
|
|
vm_page_unwire(m, 0);
|
|
/*
|
|
* Check for the object going away on us. This can
|
|
* happen since we don't hold a reference to it.
|
|
* If so, we're responsible for freeing the page.
|
|
*/
|
|
if (m->wire_count == 0 && m->object == NULL)
|
|
vm_page_free(m);
|
|
vm_page_unlock_queues();
|
|
sf->m = NULL;
|
|
mtx_lock(&sf_freelist.sf_lock);
|
|
SLIST_INSERT_HEAD(&sf_freelist.sf_head, sf, free_list);
|
|
if (sf_buf_alloc_want > 0)
|
|
wakeup_one(&sf_freelist);
|
|
mtx_unlock(&sf_freelist.sf_lock);
|
|
}
|
|
|
|
/*
|
|
* sendfile(2)
|
|
*
|
|
* MPSAFE
|
|
*
|
|
* int sendfile(int fd, int s, off_t offset, size_t nbytes,
|
|
* struct sf_hdtr *hdtr, off_t *sbytes, int flags)
|
|
*
|
|
* Send a file specified by 'fd' and starting at 'offset' to a socket
|
|
* specified by 's'. Send only 'nbytes' of the file or until EOF if
|
|
* nbytes == 0. Optionally add a header and/or trailer to the socket
|
|
* output. If specified, write the total number of bytes sent into *sbytes.
|
|
*
|
|
*/
|
|
int
|
|
sendfile(struct thread *td, struct sendfile_args *uap)
|
|
{
|
|
|
|
return (do_sendfile(td, uap, 0));
|
|
}
|
|
|
|
#ifdef COMPAT_FREEBSD4
|
|
int
|
|
freebsd4_sendfile(struct thread *td, struct freebsd4_sendfile_args *uap)
|
|
{
|
|
struct sendfile_args args;
|
|
|
|
args.fd = uap->fd;
|
|
args.s = uap->s;
|
|
args.offset = uap->offset;
|
|
args.nbytes = uap->nbytes;
|
|
args.hdtr = uap->hdtr;
|
|
args.sbytes = uap->sbytes;
|
|
args.flags = uap->flags;
|
|
|
|
return (do_sendfile(td, &args, 1));
|
|
}
|
|
#endif /* COMPAT_FREEBSD4 */
|
|
|
|
static int
|
|
do_sendfile(struct thread *td, struct sendfile_args *uap, int compat)
|
|
{
|
|
struct vnode *vp;
|
|
struct vm_object *obj;
|
|
struct socket *so = NULL;
|
|
struct mbuf *m;
|
|
struct sf_buf *sf;
|
|
struct vm_page *pg;
|
|
struct writev_args nuap;
|
|
struct sf_hdtr hdtr;
|
|
off_t off, xfsize, hdtr_size, sbytes = 0;
|
|
int error, s;
|
|
|
|
mtx_lock(&Giant);
|
|
|
|
hdtr_size = 0;
|
|
|
|
/*
|
|
* The descriptor must be a regular file and have a backing VM object.
|
|
*/
|
|
if ((error = fgetvp_read(td, uap->fd, &vp)) != 0)
|
|
goto done;
|
|
if (vp->v_type != VREG || VOP_GETVOBJECT(vp, &obj) != 0) {
|
|
error = EINVAL;
|
|
goto done;
|
|
}
|
|
if ((error = fgetsock(td, uap->s, &so, NULL)) != 0)
|
|
goto done;
|
|
if (so->so_type != SOCK_STREAM) {
|
|
error = EINVAL;
|
|
goto done;
|
|
}
|
|
if ((so->so_state & SS_ISCONNECTED) == 0) {
|
|
error = ENOTCONN;
|
|
goto done;
|
|
}
|
|
if (uap->offset < 0) {
|
|
error = EINVAL;
|
|
goto done;
|
|
}
|
|
|
|
#ifdef MAC
|
|
error = mac_check_socket_send(td->td_ucred, so);
|
|
if (error)
|
|
goto done;
|
|
#endif
|
|
|
|
/*
|
|
* If specified, get the pointer to the sf_hdtr struct for
|
|
* any headers/trailers.
|
|
*/
|
|
if (uap->hdtr != NULL) {
|
|
error = copyin(uap->hdtr, &hdtr, sizeof(hdtr));
|
|
if (error)
|
|
goto done;
|
|
/*
|
|
* Send any headers. Wimp out and use writev(2).
|
|
*/
|
|
if (hdtr.headers != NULL) {
|
|
nuap.fd = uap->s;
|
|
nuap.iovp = hdtr.headers;
|
|
nuap.iovcnt = hdtr.hdr_cnt;
|
|
error = writev(td, &nuap);
|
|
if (error)
|
|
goto done;
|
|
if (compat)
|
|
sbytes += td->td_retval[0];
|
|
else
|
|
hdtr_size += td->td_retval[0];
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Protect against multiple writers to the socket.
|
|
*/
|
|
(void) sblock(&so->so_snd, M_WAITOK);
|
|
|
|
/*
|
|
* Loop through the pages in the file, starting with the requested
|
|
* offset. Get a file page (do I/O if necessary), map the file page
|
|
* into an sf_buf, attach an mbuf header to the sf_buf, and queue
|
|
* it on the socket.
|
|
*/
|
|
for (off = uap->offset; ; off += xfsize, sbytes += xfsize) {
|
|
vm_pindex_t pindex;
|
|
vm_offset_t pgoff;
|
|
|
|
pindex = OFF_TO_IDX(off);
|
|
retry_lookup:
|
|
/*
|
|
* Calculate the amount to transfer. Not to exceed a page,
|
|
* the EOF, or the passed in nbytes.
|
|
*/
|
|
xfsize = obj->un_pager.vnp.vnp_size - off;
|
|
if (xfsize > PAGE_SIZE)
|
|
xfsize = PAGE_SIZE;
|
|
pgoff = (vm_offset_t)(off & PAGE_MASK);
|
|
if (PAGE_SIZE - pgoff < xfsize)
|
|
xfsize = PAGE_SIZE - pgoff;
|
|
if (uap->nbytes && xfsize > (uap->nbytes - sbytes))
|
|
xfsize = uap->nbytes - sbytes;
|
|
if (xfsize <= 0)
|
|
break;
|
|
/*
|
|
* Optimize the non-blocking case by looking at the socket space
|
|
* before going to the extra work of constituting the sf_buf.
|
|
*/
|
|
if ((so->so_state & SS_NBIO) && sbspace(&so->so_snd) <= 0) {
|
|
if (so->so_state & SS_CANTSENDMORE)
|
|
error = EPIPE;
|
|
else
|
|
error = EAGAIN;
|
|
sbunlock(&so->so_snd);
|
|
goto done;
|
|
}
|
|
/*
|
|
* Attempt to look up the page.
|
|
*
|
|
* Allocate if not found
|
|
*
|
|
* Wait and loop if busy.
|
|
*/
|
|
pg = vm_page_lookup(obj, pindex);
|
|
|
|
if (pg == NULL) {
|
|
pg = vm_page_alloc(obj, pindex,
|
|
VM_ALLOC_NORMAL | VM_ALLOC_WIRED);
|
|
if (pg == NULL) {
|
|
VM_WAIT;
|
|
goto retry_lookup;
|
|
}
|
|
vm_page_lock_queues();
|
|
vm_page_wakeup(pg);
|
|
} else {
|
|
vm_page_lock_queues();
|
|
if (vm_page_sleep_if_busy(pg, TRUE, "sfpbsy"))
|
|
goto retry_lookup;
|
|
/*
|
|
* Wire the page so it does not get ripped out from
|
|
* under us.
|
|
*/
|
|
vm_page_wire(pg);
|
|
}
|
|
|
|
/*
|
|
* If page is not valid for what we need, initiate I/O
|
|
*/
|
|
|
|
if (!pg->valid || !vm_page_is_valid(pg, pgoff, xfsize)) {
|
|
int bsize, resid;
|
|
|
|
/*
|
|
* Ensure that our page is still around when the I/O
|
|
* completes.
|
|
*/
|
|
vm_page_io_start(pg);
|
|
vm_page_unlock_queues();
|
|
|
|
/*
|
|
* Get the page from backing store.
|
|
*/
|
|
bsize = vp->v_mount->mnt_stat.f_iosize;
|
|
vn_lock(vp, LK_SHARED | LK_NOPAUSE | LK_RETRY, td);
|
|
/*
|
|
* XXXMAC: Because we don't have fp->f_cred here,
|
|
* we pass in NOCRED. This is probably wrong, but
|
|
* is consistent with our original implementation.
|
|
*/
|
|
error = vn_rdwr(UIO_READ, vp, NULL, MAXBSIZE,
|
|
trunc_page(off), UIO_NOCOPY, IO_NODELOCKED |
|
|
IO_VMIO | ((MAXBSIZE / bsize) << 16),
|
|
td->td_ucred, NOCRED, &resid, td);
|
|
VOP_UNLOCK(vp, 0, td);
|
|
vm_page_lock_queues();
|
|
vm_page_flag_clear(pg, PG_ZERO);
|
|
vm_page_io_finish(pg);
|
|
if (error) {
|
|
vm_page_unwire(pg, 0);
|
|
/*
|
|
* See if anyone else might know about this page.
|
|
* If not and it is not valid, then free it.
|
|
*/
|
|
if (pg->wire_count == 0 && pg->valid == 0 &&
|
|
pg->busy == 0 && !(pg->flags & PG_BUSY) &&
|
|
pg->hold_count == 0) {
|
|
vm_page_busy(pg);
|
|
vm_page_free(pg);
|
|
}
|
|
vm_page_unlock_queues();
|
|
sbunlock(&so->so_snd);
|
|
goto done;
|
|
}
|
|
}
|
|
vm_page_unlock_queues();
|
|
|
|
/*
|
|
* Get a sendfile buf. We usually wait as long as necessary,
|
|
* but this wait can be interrupted.
|
|
*/
|
|
if ((sf = sf_buf_alloc(pg)) == NULL) {
|
|
vm_page_lock_queues();
|
|
vm_page_unwire(pg, 0);
|
|
if (pg->wire_count == 0 && pg->object == NULL)
|
|
vm_page_free(pg);
|
|
vm_page_unlock_queues();
|
|
sbunlock(&so->so_snd);
|
|
error = EINTR;
|
|
goto done;
|
|
}
|
|
|
|
/*
|
|
* Get an mbuf header and set it up as having external storage.
|
|
*/
|
|
MGETHDR(m, M_TRYWAIT, MT_DATA);
|
|
if (m == NULL) {
|
|
error = ENOBUFS;
|
|
sf_buf_free((void *)sf->kva, sf);
|
|
sbunlock(&so->so_snd);
|
|
goto done;
|
|
}
|
|
/*
|
|
* Setup external storage for mbuf.
|
|
*/
|
|
MEXTADD(m, sf->kva, PAGE_SIZE, sf_buf_free, sf, M_RDONLY,
|
|
EXT_SFBUF);
|
|
m->m_data = (char *) sf->kva + pgoff;
|
|
m->m_pkthdr.len = m->m_len = xfsize;
|
|
/*
|
|
* Add the buffer to the socket buffer chain.
|
|
*/
|
|
s = splnet();
|
|
retry_space:
|
|
/*
|
|
* Make sure that the socket is still able to take more data.
|
|
* CANTSENDMORE being true usually means that the connection
|
|
* was closed. so_error is true when an error was sensed after
|
|
* a previous send.
|
|
* The state is checked after the page mapping and buffer
|
|
* allocation above since those operations may block and make
|
|
* any socket checks stale. From this point forward, nothing
|
|
* blocks before the pru_send (or more accurately, any blocking
|
|
* results in a loop back to here to re-check).
|
|
*/
|
|
if ((so->so_state & SS_CANTSENDMORE) || so->so_error) {
|
|
if (so->so_state & SS_CANTSENDMORE) {
|
|
error = EPIPE;
|
|
} else {
|
|
error = so->so_error;
|
|
so->so_error = 0;
|
|
}
|
|
m_freem(m);
|
|
sbunlock(&so->so_snd);
|
|
splx(s);
|
|
goto done;
|
|
}
|
|
/*
|
|
* Wait for socket space to become available. We do this just
|
|
* after checking the connection state above in order to avoid
|
|
* a race condition with sbwait().
|
|
*/
|
|
if (sbspace(&so->so_snd) < so->so_snd.sb_lowat) {
|
|
if (so->so_state & SS_NBIO) {
|
|
m_freem(m);
|
|
sbunlock(&so->so_snd);
|
|
splx(s);
|
|
error = EAGAIN;
|
|
goto done;
|
|
}
|
|
error = sbwait(&so->so_snd);
|
|
/*
|
|
* An error from sbwait usually indicates that we've
|
|
* been interrupted by a signal. If we've sent anything
|
|
* then return bytes sent, otherwise return the error.
|
|
*/
|
|
if (error) {
|
|
m_freem(m);
|
|
sbunlock(&so->so_snd);
|
|
splx(s);
|
|
goto done;
|
|
}
|
|
goto retry_space;
|
|
}
|
|
error = (*so->so_proto->pr_usrreqs->pru_send)(so, 0, m, 0, 0, td);
|
|
splx(s);
|
|
if (error) {
|
|
sbunlock(&so->so_snd);
|
|
goto done;
|
|
}
|
|
}
|
|
sbunlock(&so->so_snd);
|
|
|
|
/*
|
|
* Send trailers. Wimp out and use writev(2).
|
|
*/
|
|
if (uap->hdtr != NULL && hdtr.trailers != NULL) {
|
|
nuap.fd = uap->s;
|
|
nuap.iovp = hdtr.trailers;
|
|
nuap.iovcnt = hdtr.trl_cnt;
|
|
error = writev(td, &nuap);
|
|
if (error)
|
|
goto done;
|
|
if (compat)
|
|
sbytes += td->td_retval[0];
|
|
else
|
|
hdtr_size += td->td_retval[0];
|
|
}
|
|
|
|
done:
|
|
/*
|
|
* If there was no error we have to clear td->td_retval[0]
|
|
* because it may have been set by writev.
|
|
*/
|
|
if (error == 0) {
|
|
td->td_retval[0] = 0;
|
|
}
|
|
if (uap->sbytes != NULL) {
|
|
if (!compat)
|
|
sbytes += hdtr_size;
|
|
copyout(&sbytes, uap->sbytes, sizeof(off_t));
|
|
}
|
|
if (vp)
|
|
vrele(vp);
|
|
if (so)
|
|
fputsock(so);
|
|
mtx_unlock(&Giant);
|
|
return (error);
|
|
}
|