526d0bd547
Add the sysctl debug.iosize_max_clamp, enabled by default. Setting the sysctl to zero allows to perform the SSIZE_MAX-sized i/o requests from the usermode. Discussed with: bde, das (previous versions) MFC after: 1 month
2770 lines
59 KiB
C
2770 lines
59 KiB
C
/*-
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* Copyright (c) 1982, 1986, 1989, 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* sendfile(2) and related extensions:
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* Copyright (c) 1998, David Greenman. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)uipc_syscalls.c 8.4 (Berkeley) 2/21/94
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_capsicum.h"
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#include "opt_inet.h"
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#include "opt_inet6.h"
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#include "opt_sctp.h"
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#include "opt_compat.h"
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#include "opt_ktrace.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/capability.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/sysproto.h>
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#include <sys/malloc.h>
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#include <sys/filedesc.h>
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#include <sys/event.h>
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#include <sys/proc.h>
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#include <sys/fcntl.h>
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#include <sys/file.h>
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#include <sys/filio.h>
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#include <sys/jail.h>
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#include <sys/mount.h>
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#include <sys/mbuf.h>
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#include <sys/protosw.h>
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#include <sys/sf_buf.h>
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#include <sys/sysent.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/signalvar.h>
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#include <sys/syscallsubr.h>
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#include <sys/sysctl.h>
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#include <sys/uio.h>
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#include <sys/vnode.h>
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#ifdef KTRACE
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#include <sys/ktrace.h>
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#endif
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#ifdef COMPAT_FREEBSD32
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#include <compat/freebsd32/freebsd32_util.h>
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#endif
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#include <net/vnet.h>
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#include <security/audit/audit.h>
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#include <security/mac/mac_framework.h>
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#include <vm/vm.h>
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#include <vm/vm_object.h>
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#include <vm/vm_page.h>
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#include <vm/vm_pageout.h>
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#include <vm/vm_kern.h>
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#include <vm/vm_extern.h>
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#if defined(INET) || defined(INET6)
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#ifdef SCTP
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#include <netinet/sctp.h>
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#include <netinet/sctp_peeloff.h>
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#endif /* SCTP */
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#endif /* INET || INET6 */
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static int sendit(struct thread *td, int s, struct msghdr *mp, int flags);
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static int recvit(struct thread *td, int s, struct msghdr *mp, void *namelenp);
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static int accept1(struct thread *td, struct accept_args *uap, int compat);
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static int do_sendfile(struct thread *td, struct sendfile_args *uap, int compat);
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static int getsockname1(struct thread *td, struct getsockname_args *uap,
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int compat);
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static int getpeername1(struct thread *td, struct getpeername_args *uap,
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int compat);
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/*
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* NSFBUFS-related variables and associated sysctls
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*/
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int nsfbufs;
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int nsfbufspeak;
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int nsfbufsused;
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SYSCTL_INT(_kern_ipc, OID_AUTO, nsfbufs, CTLFLAG_RDTUN, &nsfbufs, 0,
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"Maximum number of sendfile(2) sf_bufs available");
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SYSCTL_INT(_kern_ipc, OID_AUTO, nsfbufspeak, CTLFLAG_RD, &nsfbufspeak, 0,
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"Number of sendfile(2) sf_bufs at peak usage");
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SYSCTL_INT(_kern_ipc, OID_AUTO, nsfbufsused, CTLFLAG_RD, &nsfbufsused, 0,
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"Number of sendfile(2) sf_bufs in use");
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/*
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* Convert a user file descriptor to a kernel file entry and check that, if
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* it is a capability, the right rights are present. A reference on the file
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* entry is held upon returning.
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*/
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static int
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getsock_cap(struct filedesc *fdp, int fd, cap_rights_t rights,
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struct file **fpp, u_int *fflagp)
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{
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struct file *fp;
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#ifdef CAPABILITIES
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struct file *fp_fromcap;
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int error;
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#endif
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fp = NULL;
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if ((fdp == NULL) || ((fp = fget_unlocked(fdp, fd)) == NULL))
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return (EBADF);
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#ifdef CAPABILITIES
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/*
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* If the file descriptor is for a capability, test rights and use
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* the file descriptor referenced by the capability.
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*/
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error = cap_funwrap(fp, rights, &fp_fromcap);
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if (error) {
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fdrop(fp, curthread);
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return (error);
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}
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if (fp != fp_fromcap) {
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fhold(fp_fromcap);
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fdrop(fp, curthread);
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fp = fp_fromcap;
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}
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#endif /* CAPABILITIES */
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if (fp->f_type != DTYPE_SOCKET) {
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fdrop(fp, curthread);
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return (ENOTSOCK);
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}
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if (fflagp != NULL)
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*fflagp = fp->f_flag;
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*fpp = fp;
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return (0);
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}
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/*
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* System call interface to the socket abstraction.
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*/
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#if defined(COMPAT_43)
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#define COMPAT_OLDSOCK
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#endif
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int
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sys_socket(td, uap)
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struct thread *td;
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struct socket_args /* {
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int domain;
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int type;
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int protocol;
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} */ *uap;
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{
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struct filedesc *fdp;
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struct socket *so;
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struct file *fp;
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int fd, error;
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AUDIT_ARG_SOCKET(uap->domain, uap->type, uap->protocol);
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#ifdef MAC
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error = mac_socket_check_create(td->td_ucred, uap->domain, uap->type,
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uap->protocol);
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if (error)
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return (error);
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#endif
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fdp = td->td_proc->p_fd;
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error = falloc(td, &fp, &fd, 0);
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if (error)
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return (error);
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/* An extra reference on `fp' has been held for us by falloc(). */
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error = socreate(uap->domain, &so, uap->type, uap->protocol,
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td->td_ucred, td);
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if (error) {
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fdclose(fdp, fp, fd, td);
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} else {
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finit(fp, FREAD | FWRITE, DTYPE_SOCKET, so, &socketops);
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td->td_retval[0] = fd;
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}
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fdrop(fp, td);
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return (error);
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}
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/* ARGSUSED */
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int
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sys_bind(td, uap)
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struct thread *td;
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struct bind_args /* {
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int s;
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caddr_t name;
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int namelen;
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} */ *uap;
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{
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struct sockaddr *sa;
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int error;
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if ((error = getsockaddr(&sa, uap->name, uap->namelen)) != 0)
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return (error);
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error = kern_bind(td, uap->s, sa);
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free(sa, M_SONAME);
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return (error);
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}
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int
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kern_bind(td, fd, sa)
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struct thread *td;
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int fd;
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struct sockaddr *sa;
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{
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struct socket *so;
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struct file *fp;
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int error;
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AUDIT_ARG_FD(fd);
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error = getsock_cap(td->td_proc->p_fd, fd, CAP_BIND, &fp, NULL);
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if (error)
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return (error);
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so = fp->f_data;
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#ifdef KTRACE
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if (KTRPOINT(td, KTR_STRUCT))
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ktrsockaddr(sa);
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#endif
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#ifdef MAC
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error = mac_socket_check_bind(td->td_ucred, so, sa);
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if (error == 0)
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#endif
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error = sobind(so, sa, td);
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fdrop(fp, td);
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return (error);
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}
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/* ARGSUSED */
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int
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sys_listen(td, uap)
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struct thread *td;
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struct listen_args /* {
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int s;
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int backlog;
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} */ *uap;
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{
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struct socket *so;
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struct file *fp;
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int error;
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AUDIT_ARG_FD(uap->s);
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error = getsock_cap(td->td_proc->p_fd, uap->s, CAP_LISTEN, &fp, NULL);
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if (error == 0) {
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so = fp->f_data;
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#ifdef MAC
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error = mac_socket_check_listen(td->td_ucred, so);
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if (error == 0)
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#endif
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error = solisten(so, uap->backlog, td);
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fdrop(fp, td);
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}
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return(error);
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}
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/*
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* accept1()
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*/
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static int
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accept1(td, uap, compat)
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struct thread *td;
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struct accept_args /* {
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int s;
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struct sockaddr * __restrict name;
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socklen_t * __restrict anamelen;
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} */ *uap;
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int compat;
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{
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struct sockaddr *name;
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socklen_t namelen;
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struct file *fp;
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int error;
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if (uap->name == NULL)
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return (kern_accept(td, uap->s, NULL, NULL, NULL));
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error = copyin(uap->anamelen, &namelen, sizeof (namelen));
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if (error)
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return (error);
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error = kern_accept(td, uap->s, &name, &namelen, &fp);
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/*
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* return a namelen of zero for older code which might
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* ignore the return value from accept.
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*/
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if (error) {
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(void) copyout(&namelen,
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uap->anamelen, sizeof(*uap->anamelen));
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return (error);
|
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}
|
|
|
|
if (error == 0 && name != NULL) {
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#ifdef COMPAT_OLDSOCK
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if (compat)
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((struct osockaddr *)name)->sa_family =
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name->sa_family;
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#endif
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error = copyout(name, uap->name, namelen);
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}
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if (error == 0)
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error = copyout(&namelen, uap->anamelen,
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sizeof(namelen));
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if (error)
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fdclose(td->td_proc->p_fd, fp, td->td_retval[0], td);
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fdrop(fp, td);
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free(name, M_SONAME);
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return (error);
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}
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int
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kern_accept(struct thread *td, int s, struct sockaddr **name,
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socklen_t *namelen, struct file **fp)
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{
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struct filedesc *fdp;
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struct file *headfp, *nfp = NULL;
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struct sockaddr *sa = NULL;
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int error;
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struct socket *head, *so;
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int fd;
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u_int fflag;
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pid_t pgid;
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int tmp;
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if (name) {
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*name = NULL;
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if (*namelen < 0)
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return (EINVAL);
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}
|
|
|
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AUDIT_ARG_FD(s);
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fdp = td->td_proc->p_fd;
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error = getsock_cap(fdp, s, CAP_ACCEPT, &headfp, &fflag);
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if (error)
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return (error);
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head = headfp->f_data;
|
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if ((head->so_options & SO_ACCEPTCONN) == 0) {
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error = EINVAL;
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goto done;
|
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}
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#ifdef MAC
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error = mac_socket_check_accept(td->td_ucred, head);
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if (error != 0)
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goto done;
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#endif
|
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error = falloc(td, &nfp, &fd, 0);
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if (error)
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goto done;
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ACCEPT_LOCK();
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if ((head->so_state & SS_NBIO) && TAILQ_EMPTY(&head->so_comp)) {
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ACCEPT_UNLOCK();
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error = EWOULDBLOCK;
|
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goto noconnection;
|
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}
|
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while (TAILQ_EMPTY(&head->so_comp) && head->so_error == 0) {
|
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if (head->so_rcv.sb_state & SBS_CANTRCVMORE) {
|
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head->so_error = ECONNABORTED;
|
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break;
|
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}
|
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error = msleep(&head->so_timeo, &accept_mtx, PSOCK | PCATCH,
|
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"accept", 0);
|
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if (error) {
|
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ACCEPT_UNLOCK();
|
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goto noconnection;
|
|
}
|
|
}
|
|
if (head->so_error) {
|
|
error = head->so_error;
|
|
head->so_error = 0;
|
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ACCEPT_UNLOCK();
|
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goto noconnection;
|
|
}
|
|
so = TAILQ_FIRST(&head->so_comp);
|
|
KASSERT(!(so->so_qstate & SQ_INCOMP), ("accept1: so SQ_INCOMP"));
|
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KASSERT(so->so_qstate & SQ_COMP, ("accept1: so not SQ_COMP"));
|
|
|
|
/*
|
|
* Before changing the flags on the socket, we have to bump the
|
|
* reference count. Otherwise, if the protocol calls sofree(),
|
|
* the socket will be released due to a zero refcount.
|
|
*/
|
|
SOCK_LOCK(so); /* soref() and so_state update */
|
|
soref(so); /* file descriptor reference */
|
|
|
|
TAILQ_REMOVE(&head->so_comp, so, so_list);
|
|
head->so_qlen--;
|
|
so->so_state |= (head->so_state & SS_NBIO);
|
|
so->so_qstate &= ~SQ_COMP;
|
|
so->so_head = NULL;
|
|
|
|
SOCK_UNLOCK(so);
|
|
ACCEPT_UNLOCK();
|
|
|
|
/* An extra reference on `nfp' has been held for us by falloc(). */
|
|
td->td_retval[0] = fd;
|
|
|
|
/* connection has been removed from the listen queue */
|
|
KNOTE_UNLOCKED(&head->so_rcv.sb_sel.si_note, 0);
|
|
|
|
pgid = fgetown(&head->so_sigio);
|
|
if (pgid != 0)
|
|
fsetown(pgid, &so->so_sigio);
|
|
|
|
finit(nfp, fflag, DTYPE_SOCKET, so, &socketops);
|
|
/* 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 (name)
|
|
*namelen = 0;
|
|
goto noconnection;
|
|
}
|
|
if (sa == NULL) {
|
|
if (name)
|
|
*namelen = 0;
|
|
goto done;
|
|
}
|
|
if (name) {
|
|
/* check sa_len before it is destroyed */
|
|
if (*namelen > sa->sa_len)
|
|
*namelen = sa->sa_len;
|
|
#ifdef KTRACE
|
|
if (KTRPOINT(td, KTR_STRUCT))
|
|
ktrsockaddr(sa);
|
|
#endif
|
|
*name = sa;
|
|
sa = NULL;
|
|
}
|
|
noconnection:
|
|
if (sa)
|
|
free(sa, M_SONAME);
|
|
|
|
/*
|
|
* close the new descriptor, assuming someone hasn't ripped it
|
|
* out from under us.
|
|
*/
|
|
if (error)
|
|
fdclose(fdp, nfp, fd, td);
|
|
|
|
/*
|
|
* Release explicitly held references before returning. We return
|
|
* a reference on nfp to the caller on success if they request it.
|
|
*/
|
|
done:
|
|
if (fp != NULL) {
|
|
if (error == 0) {
|
|
*fp = nfp;
|
|
nfp = NULL;
|
|
} else
|
|
*fp = NULL;
|
|
}
|
|
if (nfp != NULL)
|
|
fdrop(nfp, td);
|
|
fdrop(headfp, td);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_accept(td, uap)
|
|
struct thread *td;
|
|
struct accept_args *uap;
|
|
{
|
|
|
|
return (accept1(td, uap, 0));
|
|
}
|
|
|
|
#ifdef COMPAT_OLDSOCK
|
|
int
|
|
oaccept(td, uap)
|
|
struct thread *td;
|
|
struct accept_args *uap;
|
|
{
|
|
|
|
return (accept1(td, uap, 1));
|
|
}
|
|
#endif /* COMPAT_OLDSOCK */
|
|
|
|
/* ARGSUSED */
|
|
int
|
|
sys_connect(td, uap)
|
|
struct thread *td;
|
|
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);
|
|
|
|
error = kern_connect(td, uap->s, sa);
|
|
free(sa, M_SONAME);
|
|
return (error);
|
|
}
|
|
|
|
|
|
int
|
|
kern_connect(td, fd, sa)
|
|
struct thread *td;
|
|
int fd;
|
|
struct sockaddr *sa;
|
|
{
|
|
struct socket *so;
|
|
struct file *fp;
|
|
int error;
|
|
int interrupted = 0;
|
|
|
|
AUDIT_ARG_FD(fd);
|
|
error = getsock_cap(td->td_proc->p_fd, fd, CAP_CONNECT, &fp, NULL);
|
|
if (error)
|
|
return (error);
|
|
so = fp->f_data;
|
|
if (so->so_state & SS_ISCONNECTING) {
|
|
error = EALREADY;
|
|
goto done1;
|
|
}
|
|
#ifdef KTRACE
|
|
if (KTRPOINT(td, KTR_STRUCT))
|
|
ktrsockaddr(sa);
|
|
#endif
|
|
#ifdef MAC
|
|
error = mac_socket_check_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;
|
|
}
|
|
SOCK_LOCK(so);
|
|
while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
|
|
error = msleep(&so->so_timeo, SOCK_MTX(so), PSOCK | PCATCH,
|
|
"connec", 0);
|
|
if (error) {
|
|
if (error == EINTR || error == ERESTART)
|
|
interrupted = 1;
|
|
break;
|
|
}
|
|
}
|
|
if (error == 0) {
|
|
error = so->so_error;
|
|
so->so_error = 0;
|
|
}
|
|
SOCK_UNLOCK(so);
|
|
bad:
|
|
if (!interrupted)
|
|
so->so_state &= ~SS_ISCONNECTING;
|
|
if (error == ERESTART)
|
|
error = EINTR;
|
|
done1:
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
kern_socketpair(struct thread *td, int domain, int type, int protocol,
|
|
int *rsv)
|
|
{
|
|
struct filedesc *fdp = td->td_proc->p_fd;
|
|
struct file *fp1, *fp2;
|
|
struct socket *so1, *so2;
|
|
int fd, error;
|
|
|
|
AUDIT_ARG_SOCKET(domain, type, protocol);
|
|
#ifdef MAC
|
|
/* We might want to have a separate check for socket pairs. */
|
|
error = mac_socket_check_create(td->td_ucred, domain, type,
|
|
protocol);
|
|
if (error)
|
|
return (error);
|
|
#endif
|
|
error = socreate(domain, &so1, type, protocol, td->td_ucred, td);
|
|
if (error)
|
|
return (error);
|
|
error = socreate(domain, &so2, type, protocol, td->td_ucred, td);
|
|
if (error)
|
|
goto free1;
|
|
/* On success extra reference to `fp1' and 'fp2' is set by falloc. */
|
|
error = falloc(td, &fp1, &fd, 0);
|
|
if (error)
|
|
goto free2;
|
|
rsv[0] = fd;
|
|
fp1->f_data = so1; /* so1 already has ref count */
|
|
error = falloc(td, &fp2, &fd, 0);
|
|
if (error)
|
|
goto free3;
|
|
fp2->f_data = so2; /* so2 already has ref count */
|
|
rsv[1] = fd;
|
|
error = soconnect2(so1, so2);
|
|
if (error)
|
|
goto free4;
|
|
if (type == SOCK_DGRAM) {
|
|
/*
|
|
* Datagram socket connection is asymmetric.
|
|
*/
|
|
error = soconnect2(so2, so1);
|
|
if (error)
|
|
goto free4;
|
|
}
|
|
finit(fp1, FREAD | FWRITE, DTYPE_SOCKET, fp1->f_data, &socketops);
|
|
finit(fp2, FREAD | FWRITE, DTYPE_SOCKET, fp2->f_data, &socketops);
|
|
fdrop(fp1, td);
|
|
fdrop(fp2, td);
|
|
return (0);
|
|
free4:
|
|
fdclose(fdp, fp2, rsv[1], td);
|
|
fdrop(fp2, td);
|
|
free3:
|
|
fdclose(fdp, fp1, rsv[0], td);
|
|
fdrop(fp1, td);
|
|
free2:
|
|
if (so2 != NULL)
|
|
(void)soclose(so2);
|
|
free1:
|
|
if (so1 != NULL)
|
|
(void)soclose(so1);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_socketpair(struct thread *td, struct socketpair_args *uap)
|
|
{
|
|
int error, sv[2];
|
|
|
|
error = kern_socketpair(td, uap->domain, uap->type,
|
|
uap->protocol, sv);
|
|
if (error)
|
|
return (error);
|
|
error = copyout(sv, uap->rsv, 2 * sizeof(int));
|
|
if (error) {
|
|
(void)kern_close(td, sv[0]);
|
|
(void)kern_close(td, sv[1]);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
sendit(td, s, mp, flags)
|
|
struct thread *td;
|
|
int s;
|
|
struct msghdr *mp;
|
|
int flags;
|
|
{
|
|
struct mbuf *control;
|
|
struct sockaddr *to;
|
|
int error;
|
|
|
|
#ifdef CAPABILITY_MODE
|
|
if (IN_CAPABILITY_MODE(td) && (mp->msg_name != NULL))
|
|
return (ECAPMODE);
|
|
#endif
|
|
|
|
if (mp->msg_name != NULL) {
|
|
error = getsockaddr(&to, mp->msg_name, mp->msg_namelen);
|
|
if (error) {
|
|
to = NULL;
|
|
goto bad;
|
|
}
|
|
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) {
|
|
struct cmsghdr *cm;
|
|
|
|
M_PREPEND(control, sizeof(*cm), M_WAIT);
|
|
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, UIO_USERSPACE);
|
|
|
|
bad:
|
|
if (to)
|
|
free(to, M_SONAME);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
kern_sendit(td, s, mp, flags, control, segflg)
|
|
struct thread *td;
|
|
int s;
|
|
struct msghdr *mp;
|
|
int flags;
|
|
struct mbuf *control;
|
|
enum uio_seg segflg;
|
|
{
|
|
struct file *fp;
|
|
struct uio auio;
|
|
struct iovec *iov;
|
|
struct socket *so;
|
|
int i, error;
|
|
ssize_t len;
|
|
cap_rights_t rights;
|
|
#ifdef KTRACE
|
|
struct uio *ktruio = NULL;
|
|
#endif
|
|
|
|
AUDIT_ARG_FD(s);
|
|
rights = CAP_WRITE;
|
|
if (mp->msg_name != NULL)
|
|
rights |= CAP_CONNECT;
|
|
error = getsock_cap(td->td_proc->p_fd, s, rights, &fp, NULL);
|
|
if (error)
|
|
return (error);
|
|
so = (struct socket *)fp->f_data;
|
|
|
|
#ifdef KTRACE
|
|
if (mp->msg_name != NULL && KTRPOINT(td, KTR_STRUCT))
|
|
ktrsockaddr(mp->msg_name);
|
|
#endif
|
|
#ifdef MAC
|
|
if (mp->msg_name != NULL) {
|
|
error = mac_socket_check_connect(td->td_ucred, so,
|
|
mp->msg_name);
|
|
if (error)
|
|
goto bad;
|
|
}
|
|
error = mac_socket_check_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 = segflg;
|
|
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))
|
|
ktruio = cloneuio(&auio);
|
|
#endif
|
|
len = auio.uio_resid;
|
|
error = 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) &&
|
|
!(flags & MSG_NOSIGNAL)) {
|
|
PROC_LOCK(td->td_proc);
|
|
tdsignal(td, SIGPIPE);
|
|
PROC_UNLOCK(td->td_proc);
|
|
}
|
|
}
|
|
if (error == 0)
|
|
td->td_retval[0] = len - auio.uio_resid;
|
|
#ifdef KTRACE
|
|
if (ktruio != NULL) {
|
|
ktruio->uio_resid = td->td_retval[0];
|
|
ktrgenio(s, UIO_WRITE, ktruio, error);
|
|
}
|
|
#endif
|
|
bad:
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_sendto(td, uap)
|
|
struct thread *td;
|
|
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
|
|
int
|
|
osend(td, uap)
|
|
struct thread *td;
|
|
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);
|
|
}
|
|
|
|
int
|
|
osendmsg(td, uap)
|
|
struct thread *td;
|
|
struct osendmsg_args /* {
|
|
int s;
|
|
caddr_t msg;
|
|
int flags;
|
|
} */ *uap;
|
|
{
|
|
struct msghdr msg;
|
|
struct iovec *iov;
|
|
int error;
|
|
|
|
error = copyin(uap->msg, &msg, sizeof (struct omsghdr));
|
|
if (error)
|
|
return (error);
|
|
error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
|
|
if (error)
|
|
return (error);
|
|
msg.msg_iov = iov;
|
|
msg.msg_flags = MSG_COMPAT;
|
|
error = sendit(td, uap->s, &msg, uap->flags);
|
|
free(iov, M_IOV);
|
|
return (error);
|
|
}
|
|
#endif
|
|
|
|
int
|
|
sys_sendmsg(td, uap)
|
|
struct thread *td;
|
|
struct sendmsg_args /* {
|
|
int s;
|
|
caddr_t msg;
|
|
int flags;
|
|
} */ *uap;
|
|
{
|
|
struct msghdr msg;
|
|
struct iovec *iov;
|
|
int error;
|
|
|
|
error = copyin(uap->msg, &msg, sizeof (msg));
|
|
if (error)
|
|
return (error);
|
|
error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
|
|
if (error)
|
|
return (error);
|
|
msg.msg_iov = iov;
|
|
#ifdef COMPAT_OLDSOCK
|
|
msg.msg_flags = 0;
|
|
#endif
|
|
error = sendit(td, uap->s, &msg, uap->flags);
|
|
free(iov, M_IOV);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
kern_recvit(td, s, mp, fromseg, controlp)
|
|
struct thread *td;
|
|
int s;
|
|
struct msghdr *mp;
|
|
enum uio_seg fromseg;
|
|
struct mbuf **controlp;
|
|
{
|
|
struct uio auio;
|
|
struct iovec *iov;
|
|
int i;
|
|
ssize_t len;
|
|
int error;
|
|
struct mbuf *m, *control = 0;
|
|
caddr_t ctlbuf;
|
|
struct file *fp;
|
|
struct socket *so;
|
|
struct sockaddr *fromsa = 0;
|
|
#ifdef KTRACE
|
|
struct uio *ktruio = NULL;
|
|
#endif
|
|
|
|
if (controlp != NULL)
|
|
*controlp = NULL;
|
|
|
|
AUDIT_ARG_FD(s);
|
|
error = getsock_cap(td->td_proc->p_fd, s, CAP_READ, &fp, NULL);
|
|
if (error)
|
|
return (error);
|
|
so = fp->f_data;
|
|
|
|
#ifdef MAC
|
|
error = mac_socket_check_receive(td->td_ucred, so);
|
|
if (error) {
|
|
fdrop(fp, td);
|
|
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) {
|
|
fdrop(fp, td);
|
|
return (EINVAL);
|
|
}
|
|
}
|
|
#ifdef KTRACE
|
|
if (KTRPOINT(td, KTR_GENIO))
|
|
ktruio = cloneuio(&auio);
|
|
#endif
|
|
len = auio.uio_resid;
|
|
error = soreceive(so, &fromsa, &auio, (struct mbuf **)0,
|
|
(mp->msg_control || controlp) ? &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 (ktruio != NULL) {
|
|
ktruio->uio_resid = len - auio.uio_resid;
|
|
ktrgenio(s, UIO_READ, ktruio, error);
|
|
}
|
|
#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
|
|
if (fromseg == UIO_USERSPACE) {
|
|
error = copyout(fromsa, mp->msg_name,
|
|
(unsigned)len);
|
|
if (error)
|
|
goto out;
|
|
} else
|
|
bcopy(fromsa, mp->msg_name, len);
|
|
}
|
|
mp->msg_namelen = len;
|
|
}
|
|
if (mp->msg_control && controlp == NULL) {
|
|
#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:
|
|
fdrop(fp, td);
|
|
#ifdef KTRACE
|
|
if (fromsa && KTRPOINT(td, KTR_STRUCT))
|
|
ktrsockaddr(fromsa);
|
|
#endif
|
|
if (fromsa)
|
|
free(fromsa, M_SONAME);
|
|
|
|
if (error == 0 && controlp != NULL)
|
|
*controlp = control;
|
|
else if (control)
|
|
m_freem(control);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
recvit(td, s, mp, namelenp)
|
|
struct thread *td;
|
|
int s;
|
|
struct msghdr *mp;
|
|
void *namelenp;
|
|
{
|
|
int error;
|
|
|
|
error = kern_recvit(td, s, mp, UIO_USERSPACE, NULL);
|
|
if (error)
|
|
return (error);
|
|
if (namelenp) {
|
|
error = copyout(&mp->msg_namelen, namelenp, sizeof (socklen_t));
|
|
#ifdef COMPAT_OLDSOCK
|
|
if (mp->msg_flags & MSG_COMPAT)
|
|
error = 0; /* old recvfrom didn't check */
|
|
#endif
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_recvfrom(td, uap)
|
|
struct thread *td;
|
|
struct recvfrom_args /* {
|
|
int s;
|
|
caddr_t buf;
|
|
size_t len;
|
|
int flags;
|
|
struct sockaddr * __restrict from;
|
|
socklen_t * __restrict fromlenaddr;
|
|
} */ *uap;
|
|
{
|
|
struct msghdr msg;
|
|
struct iovec aiov;
|
|
int error;
|
|
|
|
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:
|
|
return(error);
|
|
}
|
|
|
|
#ifdef COMPAT_OLDSOCK
|
|
int
|
|
orecvfrom(td, uap)
|
|
struct thread *td;
|
|
struct recvfrom_args *uap;
|
|
{
|
|
|
|
uap->flags |= MSG_COMPAT;
|
|
return (sys_recvfrom(td, uap));
|
|
}
|
|
#endif
|
|
|
|
#ifdef COMPAT_OLDSOCK
|
|
int
|
|
orecv(td, uap)
|
|
struct thread *td;
|
|
struct orecv_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 = uap->flags;
|
|
error = recvit(td, uap->s, &msg, NULL);
|
|
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.
|
|
*/
|
|
int
|
|
orecvmsg(td, uap)
|
|
struct thread *td;
|
|
struct orecvmsg_args /* {
|
|
int s;
|
|
struct omsghdr *msg;
|
|
int flags;
|
|
} */ *uap;
|
|
{
|
|
struct msghdr msg;
|
|
struct iovec *iov;
|
|
int error;
|
|
|
|
error = copyin(uap->msg, &msg, sizeof (struct omsghdr));
|
|
if (error)
|
|
return (error);
|
|
error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
|
|
if (error)
|
|
return (error);
|
|
msg.msg_flags = uap->flags | MSG_COMPAT;
|
|
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));
|
|
free(iov, M_IOV);
|
|
return (error);
|
|
}
|
|
#endif
|
|
|
|
int
|
|
sys_recvmsg(td, uap)
|
|
struct thread *td;
|
|
struct recvmsg_args /* {
|
|
int s;
|
|
struct msghdr *msg;
|
|
int flags;
|
|
} */ *uap;
|
|
{
|
|
struct msghdr msg;
|
|
struct iovec *uiov, *iov;
|
|
int error;
|
|
|
|
error = copyin(uap->msg, &msg, sizeof (msg));
|
|
if (error)
|
|
return (error);
|
|
error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
|
|
if (error)
|
|
return (error);
|
|
msg.msg_flags = uap->flags;
|
|
#ifdef COMPAT_OLDSOCK
|
|
msg.msg_flags &= ~MSG_COMPAT;
|
|
#endif
|
|
uiov = msg.msg_iov;
|
|
msg.msg_iov = iov;
|
|
error = recvit(td, uap->s, &msg, NULL);
|
|
if (error == 0) {
|
|
msg.msg_iov = uiov;
|
|
error = copyout(&msg, uap->msg, sizeof(msg));
|
|
}
|
|
free(iov, M_IOV);
|
|
return (error);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
int
|
|
sys_shutdown(td, uap)
|
|
struct thread *td;
|
|
struct shutdown_args /* {
|
|
int s;
|
|
int how;
|
|
} */ *uap;
|
|
{
|
|
struct socket *so;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
AUDIT_ARG_FD(uap->s);
|
|
error = getsock_cap(td->td_proc->p_fd, uap->s, CAP_SHUTDOWN, &fp,
|
|
NULL);
|
|
if (error == 0) {
|
|
so = fp->f_data;
|
|
error = soshutdown(so, uap->how);
|
|
fdrop(fp, td);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
int
|
|
sys_setsockopt(td, uap)
|
|
struct thread *td;
|
|
struct setsockopt_args /* {
|
|
int s;
|
|
int level;
|
|
int name;
|
|
caddr_t val;
|
|
int valsize;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_setsockopt(td, uap->s, uap->level, uap->name,
|
|
uap->val, UIO_USERSPACE, uap->valsize));
|
|
}
|
|
|
|
int
|
|
kern_setsockopt(td, s, level, name, val, valseg, valsize)
|
|
struct thread *td;
|
|
int s;
|
|
int level;
|
|
int name;
|
|
void *val;
|
|
enum uio_seg valseg;
|
|
socklen_t valsize;
|
|
{
|
|
int error;
|
|
struct socket *so;
|
|
struct file *fp;
|
|
struct sockopt sopt;
|
|
|
|
if (val == NULL && valsize != 0)
|
|
return (EFAULT);
|
|
if ((int)valsize < 0)
|
|
return (EINVAL);
|
|
|
|
sopt.sopt_dir = SOPT_SET;
|
|
sopt.sopt_level = level;
|
|
sopt.sopt_name = name;
|
|
sopt.sopt_val = val;
|
|
sopt.sopt_valsize = valsize;
|
|
switch (valseg) {
|
|
case UIO_USERSPACE:
|
|
sopt.sopt_td = td;
|
|
break;
|
|
case UIO_SYSSPACE:
|
|
sopt.sopt_td = NULL;
|
|
break;
|
|
default:
|
|
panic("kern_setsockopt called with bad valseg");
|
|
}
|
|
|
|
AUDIT_ARG_FD(s);
|
|
error = getsock_cap(td->td_proc->p_fd, s, CAP_SETSOCKOPT, &fp, NULL);
|
|
if (error == 0) {
|
|
so = fp->f_data;
|
|
error = sosetopt(so, &sopt);
|
|
fdrop(fp, td);
|
|
}
|
|
return(error);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
int
|
|
sys_getsockopt(td, uap)
|
|
struct thread *td;
|
|
struct getsockopt_args /* {
|
|
int s;
|
|
int level;
|
|
int name;
|
|
void * __restrict val;
|
|
socklen_t * __restrict avalsize;
|
|
} */ *uap;
|
|
{
|
|
socklen_t valsize;
|
|
int error;
|
|
|
|
if (uap->val) {
|
|
error = copyin(uap->avalsize, &valsize, sizeof (valsize));
|
|
if (error)
|
|
return (error);
|
|
}
|
|
|
|
error = kern_getsockopt(td, uap->s, uap->level, uap->name,
|
|
uap->val, UIO_USERSPACE, &valsize);
|
|
|
|
if (error == 0)
|
|
error = copyout(&valsize, uap->avalsize, sizeof (valsize));
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Kernel version of getsockopt.
|
|
* optval can be a userland or userspace. optlen is always a kernel pointer.
|
|
*/
|
|
int
|
|
kern_getsockopt(td, s, level, name, val, valseg, valsize)
|
|
struct thread *td;
|
|
int s;
|
|
int level;
|
|
int name;
|
|
void *val;
|
|
enum uio_seg valseg;
|
|
socklen_t *valsize;
|
|
{
|
|
int error;
|
|
struct socket *so;
|
|
struct file *fp;
|
|
struct sockopt sopt;
|
|
|
|
if (val == NULL)
|
|
*valsize = 0;
|
|
if ((int)*valsize < 0)
|
|
return (EINVAL);
|
|
|
|
sopt.sopt_dir = SOPT_GET;
|
|
sopt.sopt_level = level;
|
|
sopt.sopt_name = name;
|
|
sopt.sopt_val = val;
|
|
sopt.sopt_valsize = (size_t)*valsize; /* checked non-negative above */
|
|
switch (valseg) {
|
|
case UIO_USERSPACE:
|
|
sopt.sopt_td = td;
|
|
break;
|
|
case UIO_SYSSPACE:
|
|
sopt.sopt_td = NULL;
|
|
break;
|
|
default:
|
|
panic("kern_getsockopt called with bad valseg");
|
|
}
|
|
|
|
AUDIT_ARG_FD(s);
|
|
error = getsock_cap(td->td_proc->p_fd, s, CAP_GETSOCKOPT, &fp, NULL);
|
|
if (error == 0) {
|
|
so = fp->f_data;
|
|
error = sogetopt(so, &sopt);
|
|
*valsize = sopt.sopt_valsize;
|
|
fdrop(fp, td);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* getsockname1() - Get socket name.
|
|
*/
|
|
/* ARGSUSED */
|
|
static int
|
|
getsockname1(td, uap, compat)
|
|
struct thread *td;
|
|
struct getsockname_args /* {
|
|
int fdes;
|
|
struct sockaddr * __restrict asa;
|
|
socklen_t * __restrict alen;
|
|
} */ *uap;
|
|
int compat;
|
|
{
|
|
struct sockaddr *sa;
|
|
socklen_t len;
|
|
int error;
|
|
|
|
error = copyin(uap->alen, &len, sizeof(len));
|
|
if (error)
|
|
return (error);
|
|
|
|
error = kern_getsockname(td, uap->fdes, &sa, &len);
|
|
if (error)
|
|
return (error);
|
|
|
|
if (len != 0) {
|
|
#ifdef COMPAT_OLDSOCK
|
|
if (compat)
|
|
((struct osockaddr *)sa)->sa_family = sa->sa_family;
|
|
#endif
|
|
error = copyout(sa, uap->asa, (u_int)len);
|
|
}
|
|
free(sa, M_SONAME);
|
|
if (error == 0)
|
|
error = copyout(&len, uap->alen, sizeof(len));
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
kern_getsockname(struct thread *td, int fd, struct sockaddr **sa,
|
|
socklen_t *alen)
|
|
{
|
|
struct socket *so;
|
|
struct file *fp;
|
|
socklen_t len;
|
|
int error;
|
|
|
|
if (*alen < 0)
|
|
return (EINVAL);
|
|
|
|
AUDIT_ARG_FD(fd);
|
|
error = getsock_cap(td->td_proc->p_fd, fd, CAP_GETSOCKNAME, &fp, NULL);
|
|
if (error)
|
|
return (error);
|
|
so = fp->f_data;
|
|
*sa = NULL;
|
|
CURVNET_SET(so->so_vnet);
|
|
error = (*so->so_proto->pr_usrreqs->pru_sockaddr)(so, sa);
|
|
CURVNET_RESTORE();
|
|
if (error)
|
|
goto bad;
|
|
if (*sa == NULL)
|
|
len = 0;
|
|
else
|
|
len = MIN(*alen, (*sa)->sa_len);
|
|
*alen = len;
|
|
#ifdef KTRACE
|
|
if (KTRPOINT(td, KTR_STRUCT))
|
|
ktrsockaddr(*sa);
|
|
#endif
|
|
bad:
|
|
fdrop(fp, td);
|
|
if (error && *sa) {
|
|
free(*sa, M_SONAME);
|
|
*sa = NULL;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_getsockname(td, uap)
|
|
struct thread *td;
|
|
struct getsockname_args *uap;
|
|
{
|
|
|
|
return (getsockname1(td, uap, 0));
|
|
}
|
|
|
|
#ifdef COMPAT_OLDSOCK
|
|
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.
|
|
*/
|
|
/* ARGSUSED */
|
|
static int
|
|
getpeername1(td, uap, compat)
|
|
struct thread *td;
|
|
struct getpeername_args /* {
|
|
int fdes;
|
|
struct sockaddr * __restrict asa;
|
|
socklen_t * __restrict alen;
|
|
} */ *uap;
|
|
int compat;
|
|
{
|
|
struct sockaddr *sa;
|
|
socklen_t len;
|
|
int error;
|
|
|
|
error = copyin(uap->alen, &len, sizeof (len));
|
|
if (error)
|
|
return (error);
|
|
|
|
error = kern_getpeername(td, uap->fdes, &sa, &len);
|
|
if (error)
|
|
return (error);
|
|
|
|
if (len != 0) {
|
|
#ifdef COMPAT_OLDSOCK
|
|
if (compat)
|
|
((struct osockaddr *)sa)->sa_family = sa->sa_family;
|
|
#endif
|
|
error = copyout(sa, uap->asa, (u_int)len);
|
|
}
|
|
free(sa, M_SONAME);
|
|
if (error == 0)
|
|
error = copyout(&len, uap->alen, sizeof(len));
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
kern_getpeername(struct thread *td, int fd, struct sockaddr **sa,
|
|
socklen_t *alen)
|
|
{
|
|
struct socket *so;
|
|
struct file *fp;
|
|
socklen_t len;
|
|
int error;
|
|
|
|
if (*alen < 0)
|
|
return (EINVAL);
|
|
|
|
AUDIT_ARG_FD(fd);
|
|
error = getsock_cap(td->td_proc->p_fd, fd, CAP_GETPEERNAME, &fp, NULL);
|
|
if (error)
|
|
return (error);
|
|
so = fp->f_data;
|
|
if ((so->so_state & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0) {
|
|
error = ENOTCONN;
|
|
goto done;
|
|
}
|
|
*sa = NULL;
|
|
CURVNET_SET(so->so_vnet);
|
|
error = (*so->so_proto->pr_usrreqs->pru_peeraddr)(so, sa);
|
|
CURVNET_RESTORE();
|
|
if (error)
|
|
goto bad;
|
|
if (*sa == NULL)
|
|
len = 0;
|
|
else
|
|
len = MIN(*alen, (*sa)->sa_len);
|
|
*alen = len;
|
|
#ifdef KTRACE
|
|
if (KTRPOINT(td, KTR_STRUCT))
|
|
ktrsockaddr(*sa);
|
|
#endif
|
|
bad:
|
|
if (error && *sa) {
|
|
free(*sa, M_SONAME);
|
|
*sa = NULL;
|
|
}
|
|
done:
|
|
fdrop(fp, td);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_getpeername(td, uap)
|
|
struct thread *td;
|
|
struct getpeername_args *uap;
|
|
{
|
|
|
|
return (getpeername1(td, uap, 0));
|
|
}
|
|
|
|
#ifdef COMPAT_OLDSOCK
|
|
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;
|
|
{
|
|
struct sockaddr *sa;
|
|
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
|
|
if ((u_int)buflen > MCLBYTES)
|
|
return (EINVAL);
|
|
}
|
|
m = m_get(M_WAIT, type);
|
|
if ((u_int)buflen > MLEN)
|
|
MCLGET(m, M_WAIT);
|
|
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);
|
|
if (len < offsetof(struct sockaddr, sa_data[0]))
|
|
return (EINVAL);
|
|
sa = malloc(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);
|
|
}
|
|
|
|
#include <sys/condvar.h>
|
|
|
|
struct sendfile_sync {
|
|
struct mtx mtx;
|
|
struct cv cv;
|
|
unsigned count;
|
|
};
|
|
|
|
/*
|
|
* Detach mapped page and release resources back to the system.
|
|
*/
|
|
void
|
|
sf_buf_mext(void *addr, void *args)
|
|
{
|
|
vm_page_t m;
|
|
struct sendfile_sync *sfs;
|
|
|
|
m = sf_buf_page(args);
|
|
sf_buf_free(args);
|
|
vm_page_lock(m);
|
|
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(m);
|
|
if (addr == NULL)
|
|
return;
|
|
sfs = addr;
|
|
mtx_lock(&sfs->mtx);
|
|
KASSERT(sfs->count> 0, ("Sendfile sync botchup count == 0"));
|
|
if (--sfs->count == 0)
|
|
cv_signal(&sfs->cv);
|
|
mtx_unlock(&sfs->mtx);
|
|
}
|
|
|
|
/*
|
|
* sendfile(2)
|
|
*
|
|
* 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
|
|
sys_sendfile(struct thread *td, struct sendfile_args *uap)
|
|
{
|
|
|
|
return (do_sendfile(td, uap, 0));
|
|
}
|
|
|
|
static int
|
|
do_sendfile(struct thread *td, struct sendfile_args *uap, int compat)
|
|
{
|
|
struct sf_hdtr hdtr;
|
|
struct uio *hdr_uio, *trl_uio;
|
|
int error;
|
|
|
|
hdr_uio = trl_uio = NULL;
|
|
|
|
if (uap->hdtr != NULL) {
|
|
error = copyin(uap->hdtr, &hdtr, sizeof(hdtr));
|
|
if (error)
|
|
goto out;
|
|
if (hdtr.headers != NULL) {
|
|
error = copyinuio(hdtr.headers, hdtr.hdr_cnt, &hdr_uio);
|
|
if (error)
|
|
goto out;
|
|
}
|
|
if (hdtr.trailers != NULL) {
|
|
error = copyinuio(hdtr.trailers, hdtr.trl_cnt, &trl_uio);
|
|
if (error)
|
|
goto out;
|
|
|
|
}
|
|
}
|
|
|
|
error = kern_sendfile(td, uap, hdr_uio, trl_uio, compat);
|
|
out:
|
|
if (hdr_uio)
|
|
free(hdr_uio, M_IOV);
|
|
if (trl_uio)
|
|
free(trl_uio, M_IOV);
|
|
return (error);
|
|
}
|
|
|
|
#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 */
|
|
|
|
int
|
|
kern_sendfile(struct thread *td, struct sendfile_args *uap,
|
|
struct uio *hdr_uio, struct uio *trl_uio, int compat)
|
|
{
|
|
struct file *sock_fp;
|
|
struct vnode *vp;
|
|
struct vm_object *obj = NULL;
|
|
struct socket *so = NULL;
|
|
struct mbuf *m = NULL;
|
|
struct sf_buf *sf;
|
|
struct vm_page *pg;
|
|
off_t off, xfsize, fsbytes = 0, sbytes = 0, rem = 0;
|
|
int error, hdrlen = 0, mnw = 0;
|
|
int vfslocked;
|
|
struct sendfile_sync *sfs = NULL;
|
|
|
|
/*
|
|
* The file descriptor must be a regular file and have a
|
|
* backing VM object.
|
|
* File offset must be positive. If it goes beyond EOF
|
|
* we send only the header/trailer and no payload data.
|
|
*/
|
|
AUDIT_ARG_FD(uap->fd);
|
|
if ((error = fgetvp_read(td, uap->fd, CAP_READ, &vp)) != 0)
|
|
goto out;
|
|
vfslocked = VFS_LOCK_GIANT(vp->v_mount);
|
|
vn_lock(vp, LK_SHARED | LK_RETRY);
|
|
if (vp->v_type == VREG) {
|
|
obj = vp->v_object;
|
|
if (obj != NULL) {
|
|
/*
|
|
* Temporarily increase the backing VM
|
|
* object's reference count so that a forced
|
|
* reclamation of its vnode does not
|
|
* immediately destroy it.
|
|
*/
|
|
VM_OBJECT_LOCK(obj);
|
|
if ((obj->flags & OBJ_DEAD) == 0) {
|
|
vm_object_reference_locked(obj);
|
|
VM_OBJECT_UNLOCK(obj);
|
|
} else {
|
|
VM_OBJECT_UNLOCK(obj);
|
|
obj = NULL;
|
|
}
|
|
}
|
|
}
|
|
VOP_UNLOCK(vp, 0);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
if (obj == NULL) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
if (uap->offset < 0) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* The socket must be a stream socket and connected.
|
|
* Remember if it a blocking or non-blocking socket.
|
|
*/
|
|
if ((error = getsock_cap(td->td_proc->p_fd, uap->s, CAP_WRITE,
|
|
&sock_fp, NULL)) != 0)
|
|
goto out;
|
|
so = sock_fp->f_data;
|
|
if (so->so_type != SOCK_STREAM) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
if ((so->so_state & SS_ISCONNECTED) == 0) {
|
|
error = ENOTCONN;
|
|
goto out;
|
|
}
|
|
/*
|
|
* Do not wait on memory allocations but return ENOMEM for
|
|
* caller to retry later.
|
|
* XXX: Experimental.
|
|
*/
|
|
if (uap->flags & SF_MNOWAIT)
|
|
mnw = 1;
|
|
|
|
if (uap->flags & SF_SYNC) {
|
|
sfs = malloc(sizeof *sfs, M_TEMP, M_WAITOK | M_ZERO);
|
|
mtx_init(&sfs->mtx, "sendfile", NULL, MTX_DEF);
|
|
cv_init(&sfs->cv, "sendfile");
|
|
}
|
|
|
|
#ifdef MAC
|
|
error = mac_socket_check_send(td->td_ucred, so);
|
|
if (error)
|
|
goto out;
|
|
#endif
|
|
|
|
/* If headers are specified copy them into mbufs. */
|
|
if (hdr_uio != NULL) {
|
|
hdr_uio->uio_td = td;
|
|
hdr_uio->uio_rw = UIO_WRITE;
|
|
if (hdr_uio->uio_resid > 0) {
|
|
/*
|
|
* In FBSD < 5.0 the nbytes to send also included
|
|
* the header. If compat is specified subtract the
|
|
* header size from nbytes.
|
|
*/
|
|
if (compat) {
|
|
if (uap->nbytes > hdr_uio->uio_resid)
|
|
uap->nbytes -= hdr_uio->uio_resid;
|
|
else
|
|
uap->nbytes = 0;
|
|
}
|
|
m = m_uiotombuf(hdr_uio, (mnw ? M_NOWAIT : M_WAITOK),
|
|
0, 0, 0);
|
|
if (m == NULL) {
|
|
error = mnw ? EAGAIN : ENOBUFS;
|
|
goto out;
|
|
}
|
|
hdrlen = m_length(m, NULL);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Protect against multiple writers to the socket.
|
|
*
|
|
* XXXRW: Historically this has assumed non-interruptibility, so now
|
|
* we implement that, but possibly shouldn't.
|
|
*/
|
|
(void)sblock(&so->so_snd, SBL_WAIT | SBL_NOINTR);
|
|
|
|
/*
|
|
* Loop through the pages of 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.
|
|
* This is done in two loops. The inner loop turns as many pages
|
|
* as it can, up to available socket buffer space, without blocking
|
|
* into mbufs to have it bulk delivered into the socket send buffer.
|
|
* The outer loop checks the state and available space of the socket
|
|
* and takes care of the overall progress.
|
|
*/
|
|
for (off = uap->offset, rem = uap->nbytes; ; ) {
|
|
int loopbytes = 0;
|
|
int space = 0;
|
|
int done = 0;
|
|
|
|
/*
|
|
* Check the socket state for ongoing connection,
|
|
* no errors and space in socket buffer.
|
|
* If space is low allow for the remainder of the
|
|
* file to be processed if it fits the socket buffer.
|
|
* Otherwise block in waiting for sufficient space
|
|
* to proceed, or if the socket is nonblocking, return
|
|
* to userland with EAGAIN while reporting how far
|
|
* we've come.
|
|
* We wait until the socket buffer has significant free
|
|
* space to do bulk sends. This makes good use of file
|
|
* system read ahead and allows packet segmentation
|
|
* offloading hardware to take over lots of work. If
|
|
* we were not careful here we would send off only one
|
|
* sfbuf at a time.
|
|
*/
|
|
SOCKBUF_LOCK(&so->so_snd);
|
|
if (so->so_snd.sb_lowat < so->so_snd.sb_hiwat / 2)
|
|
so->so_snd.sb_lowat = so->so_snd.sb_hiwat / 2;
|
|
retry_space:
|
|
if (so->so_snd.sb_state & SBS_CANTSENDMORE) {
|
|
error = EPIPE;
|
|
SOCKBUF_UNLOCK(&so->so_snd);
|
|
goto done;
|
|
} else if (so->so_error) {
|
|
error = so->so_error;
|
|
so->so_error = 0;
|
|
SOCKBUF_UNLOCK(&so->so_snd);
|
|
goto done;
|
|
}
|
|
space = sbspace(&so->so_snd);
|
|
if (space < rem &&
|
|
(space <= 0 ||
|
|
space < so->so_snd.sb_lowat)) {
|
|
if (so->so_state & SS_NBIO) {
|
|
SOCKBUF_UNLOCK(&so->so_snd);
|
|
error = EAGAIN;
|
|
goto done;
|
|
}
|
|
/*
|
|
* sbwait drops the lock while sleeping.
|
|
* When we loop back to retry_space the
|
|
* state may have changed and we retest
|
|
* for it.
|
|
*/
|
|
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) {
|
|
SOCKBUF_UNLOCK(&so->so_snd);
|
|
goto done;
|
|
}
|
|
goto retry_space;
|
|
}
|
|
SOCKBUF_UNLOCK(&so->so_snd);
|
|
|
|
/*
|
|
* Reduce space in the socket buffer by the size of
|
|
* the header mbuf chain.
|
|
* hdrlen is set to 0 after the first loop.
|
|
*/
|
|
space -= hdrlen;
|
|
|
|
/*
|
|
* Loop and construct maximum sized mbuf chain to be bulk
|
|
* dumped into socket buffer.
|
|
*/
|
|
while (space > loopbytes) {
|
|
vm_pindex_t pindex;
|
|
vm_offset_t pgoff;
|
|
struct mbuf *m0;
|
|
|
|
VM_OBJECT_LOCK(obj);
|
|
/*
|
|
* Calculate the amount to transfer.
|
|
* Not to exceed a page, the EOF,
|
|
* or the passed in nbytes.
|
|
*/
|
|
pgoff = (vm_offset_t)(off & PAGE_MASK);
|
|
xfsize = omin(PAGE_SIZE - pgoff,
|
|
obj->un_pager.vnp.vnp_size - uap->offset -
|
|
fsbytes - loopbytes);
|
|
if (uap->nbytes)
|
|
rem = (uap->nbytes - fsbytes - loopbytes);
|
|
else
|
|
rem = obj->un_pager.vnp.vnp_size -
|
|
uap->offset - fsbytes - loopbytes;
|
|
xfsize = omin(rem, xfsize);
|
|
xfsize = omin(space - loopbytes, xfsize);
|
|
if (xfsize <= 0) {
|
|
VM_OBJECT_UNLOCK(obj);
|
|
done = 1; /* all data sent */
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Attempt to look up the page. Allocate
|
|
* if not found or wait and loop if busy.
|
|
*/
|
|
pindex = OFF_TO_IDX(off);
|
|
pg = vm_page_grab(obj, pindex, VM_ALLOC_NOBUSY |
|
|
VM_ALLOC_NORMAL | VM_ALLOC_WIRED | VM_ALLOC_RETRY);
|
|
|
|
/*
|
|
* Check if page is valid for what we need,
|
|
* otherwise initiate I/O.
|
|
* If we already turned some pages into mbufs,
|
|
* send them off before we come here again and
|
|
* block.
|
|
*/
|
|
if (pg->valid && vm_page_is_valid(pg, pgoff, xfsize))
|
|
VM_OBJECT_UNLOCK(obj);
|
|
else if (m != NULL)
|
|
error = EAGAIN; /* send what we already got */
|
|
else if (uap->flags & SF_NODISKIO)
|
|
error = EBUSY;
|
|
else {
|
|
int bsize;
|
|
ssize_t resid;
|
|
|
|
/*
|
|
* Ensure that our page is still around
|
|
* when the I/O completes.
|
|
*/
|
|
vm_page_io_start(pg);
|
|
VM_OBJECT_UNLOCK(obj);
|
|
|
|
/*
|
|
* Get the page from backing store.
|
|
*/
|
|
vfslocked = VFS_LOCK_GIANT(vp->v_mount);
|
|
error = vn_lock(vp, LK_SHARED);
|
|
if (error != 0)
|
|
goto after_read;
|
|
bsize = vp->v_mount->mnt_stat.f_iosize;
|
|
|
|
/*
|
|
* 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) << IO_SEQSHIFT),
|
|
td->td_ucred, NOCRED, &resid, td);
|
|
VOP_UNLOCK(vp, 0);
|
|
after_read:
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
VM_OBJECT_LOCK(obj);
|
|
vm_page_io_finish(pg);
|
|
if (!error)
|
|
VM_OBJECT_UNLOCK(obj);
|
|
mbstat.sf_iocnt++;
|
|
}
|
|
if (error) {
|
|
vm_page_lock(pg);
|
|
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->oflags & VPO_BUSY))
|
|
vm_page_free(pg);
|
|
vm_page_unlock(pg);
|
|
VM_OBJECT_UNLOCK(obj);
|
|
if (error == EAGAIN)
|
|
error = 0; /* not a real error */
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Get a sendfile buf. When allocating the
|
|
* first buffer for mbuf chain, we usually
|
|
* wait as long as necessary, but this wait
|
|
* can be interrupted. For consequent
|
|
* buffers, do not sleep, since several
|
|
* threads might exhaust the buffers and then
|
|
* deadlock.
|
|
*/
|
|
sf = sf_buf_alloc(pg, (mnw || m != NULL) ? SFB_NOWAIT :
|
|
SFB_CATCH);
|
|
if (sf == NULL) {
|
|
mbstat.sf_allocfail++;
|
|
vm_page_lock(pg);
|
|
vm_page_unwire(pg, 0);
|
|
KASSERT(pg->object != NULL,
|
|
("kern_sendfile: object disappeared"));
|
|
vm_page_unlock(pg);
|
|
if (m == NULL)
|
|
error = (mnw ? EAGAIN : EINTR);
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Get an mbuf and set it up as having
|
|
* external storage.
|
|
*/
|
|
m0 = m_get((mnw ? M_NOWAIT : M_WAITOK), MT_DATA);
|
|
if (m0 == NULL) {
|
|
error = (mnw ? EAGAIN : ENOBUFS);
|
|
sf_buf_mext((void *)sf_buf_kva(sf), sf);
|
|
break;
|
|
}
|
|
MEXTADD(m0, sf_buf_kva(sf), PAGE_SIZE, sf_buf_mext,
|
|
sfs, sf, M_RDONLY, EXT_SFBUF);
|
|
m0->m_data = (char *)sf_buf_kva(sf) + pgoff;
|
|
m0->m_len = xfsize;
|
|
|
|
/* Append to mbuf chain. */
|
|
if (m != NULL)
|
|
m_cat(m, m0);
|
|
else
|
|
m = m0;
|
|
|
|
/* Keep track of bits processed. */
|
|
loopbytes += xfsize;
|
|
off += xfsize;
|
|
|
|
if (sfs != NULL) {
|
|
mtx_lock(&sfs->mtx);
|
|
sfs->count++;
|
|
mtx_unlock(&sfs->mtx);
|
|
}
|
|
}
|
|
|
|
/* Add the buffer chain to the socket buffer. */
|
|
if (m != NULL) {
|
|
int mlen, err;
|
|
|
|
mlen = m_length(m, NULL);
|
|
SOCKBUF_LOCK(&so->so_snd);
|
|
if (so->so_snd.sb_state & SBS_CANTSENDMORE) {
|
|
error = EPIPE;
|
|
SOCKBUF_UNLOCK(&so->so_snd);
|
|
goto done;
|
|
}
|
|
SOCKBUF_UNLOCK(&so->so_snd);
|
|
CURVNET_SET(so->so_vnet);
|
|
/* Avoid error aliasing. */
|
|
err = (*so->so_proto->pr_usrreqs->pru_send)
|
|
(so, 0, m, NULL, NULL, td);
|
|
CURVNET_RESTORE();
|
|
if (err == 0) {
|
|
/*
|
|
* We need two counters to get the
|
|
* file offset and nbytes to send
|
|
* right:
|
|
* - sbytes contains the total amount
|
|
* of bytes sent, including headers.
|
|
* - fsbytes contains the total amount
|
|
* of bytes sent from the file.
|
|
*/
|
|
sbytes += mlen;
|
|
fsbytes += mlen;
|
|
if (hdrlen) {
|
|
fsbytes -= hdrlen;
|
|
hdrlen = 0;
|
|
}
|
|
} else if (error == 0)
|
|
error = err;
|
|
m = NULL; /* pru_send always consumes */
|
|
}
|
|
|
|
/* Quit outer loop on error or when we're done. */
|
|
if (done)
|
|
break;
|
|
if (error)
|
|
goto done;
|
|
}
|
|
|
|
/*
|
|
* Send trailers. Wimp out and use writev(2).
|
|
*/
|
|
if (trl_uio != NULL) {
|
|
sbunlock(&so->so_snd);
|
|
error = kern_writev(td, uap->s, trl_uio);
|
|
if (error == 0)
|
|
sbytes += td->td_retval[0];
|
|
goto out;
|
|
}
|
|
|
|
done:
|
|
sbunlock(&so->so_snd);
|
|
out:
|
|
/*
|
|
* 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) {
|
|
copyout(&sbytes, uap->sbytes, sizeof(off_t));
|
|
}
|
|
if (obj != NULL)
|
|
vm_object_deallocate(obj);
|
|
if (vp != NULL) {
|
|
vfslocked = VFS_LOCK_GIANT(vp->v_mount);
|
|
vrele(vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
}
|
|
if (so)
|
|
fdrop(sock_fp, td);
|
|
if (m)
|
|
m_freem(m);
|
|
|
|
if (sfs != NULL) {
|
|
mtx_lock(&sfs->mtx);
|
|
if (sfs->count != 0)
|
|
cv_wait(&sfs->cv, &sfs->mtx);
|
|
KASSERT(sfs->count == 0, ("sendfile sync still busy"));
|
|
cv_destroy(&sfs->cv);
|
|
mtx_destroy(&sfs->mtx);
|
|
free(sfs, M_TEMP);
|
|
}
|
|
|
|
if (error == ERESTART)
|
|
error = EINTR;
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* SCTP syscalls.
|
|
* Functionality only compiled in if SCTP is defined in the kernel Makefile,
|
|
* otherwise all return EOPNOTSUPP.
|
|
* XXX: We should make this loadable one day.
|
|
*/
|
|
int
|
|
sys_sctp_peeloff(td, uap)
|
|
struct thread *td;
|
|
struct sctp_peeloff_args /* {
|
|
int sd;
|
|
caddr_t name;
|
|
} */ *uap;
|
|
{
|
|
#if (defined(INET) || defined(INET6)) && defined(SCTP)
|
|
struct filedesc *fdp;
|
|
struct file *nfp = NULL;
|
|
int error;
|
|
struct socket *head, *so;
|
|
int fd;
|
|
u_int fflag;
|
|
|
|
fdp = td->td_proc->p_fd;
|
|
AUDIT_ARG_FD(uap->sd);
|
|
error = fgetsock(td, uap->sd, CAP_PEELOFF, &head, &fflag);
|
|
if (error)
|
|
goto done2;
|
|
error = sctp_can_peel_off(head, (sctp_assoc_t)uap->name);
|
|
if (error)
|
|
goto done2;
|
|
/*
|
|
* At this point we know we do have a assoc to pull
|
|
* we proceed to get the fd setup. This may block
|
|
* but that is ok.
|
|
*/
|
|
|
|
error = falloc(td, &nfp, &fd, 0);
|
|
if (error)
|
|
goto done;
|
|
td->td_retval[0] = fd;
|
|
|
|
CURVNET_SET(head->so_vnet);
|
|
so = sonewconn(head, SS_ISCONNECTED);
|
|
if (so == NULL)
|
|
goto noconnection;
|
|
/*
|
|
* Before changing the flags on the socket, we have to bump the
|
|
* reference count. Otherwise, if the protocol calls sofree(),
|
|
* the socket will be released due to a zero refcount.
|
|
*/
|
|
SOCK_LOCK(so);
|
|
soref(so); /* file descriptor reference */
|
|
SOCK_UNLOCK(so);
|
|
|
|
ACCEPT_LOCK();
|
|
|
|
TAILQ_REMOVE(&head->so_comp, so, so_list);
|
|
head->so_qlen--;
|
|
so->so_state |= (head->so_state & SS_NBIO);
|
|
so->so_state &= ~SS_NOFDREF;
|
|
so->so_qstate &= ~SQ_COMP;
|
|
so->so_head = NULL;
|
|
ACCEPT_UNLOCK();
|
|
finit(nfp, fflag, DTYPE_SOCKET, so, &socketops);
|
|
error = sctp_do_peeloff(head, so, (sctp_assoc_t)uap->name);
|
|
if (error)
|
|
goto noconnection;
|
|
if (head->so_sigio != NULL)
|
|
fsetown(fgetown(&head->so_sigio), &so->so_sigio);
|
|
|
|
noconnection:
|
|
/*
|
|
* close the new descriptor, assuming someone hasn't ripped it
|
|
* out from under us.
|
|
*/
|
|
if (error)
|
|
fdclose(fdp, nfp, fd, td);
|
|
|
|
/*
|
|
* Release explicitly held references before returning.
|
|
*/
|
|
CURVNET_RESTORE();
|
|
done:
|
|
if (nfp != NULL)
|
|
fdrop(nfp, td);
|
|
fputsock(head);
|
|
done2:
|
|
return (error);
|
|
#else /* SCTP */
|
|
return (EOPNOTSUPP);
|
|
#endif /* SCTP */
|
|
}
|
|
|
|
int
|
|
sys_sctp_generic_sendmsg (td, uap)
|
|
struct thread *td;
|
|
struct sctp_generic_sendmsg_args /* {
|
|
int sd,
|
|
caddr_t msg,
|
|
int mlen,
|
|
caddr_t to,
|
|
__socklen_t tolen,
|
|
struct sctp_sndrcvinfo *sinfo,
|
|
int flags
|
|
} */ *uap;
|
|
{
|
|
#if (defined(INET) || defined(INET6)) && defined(SCTP)
|
|
struct sctp_sndrcvinfo sinfo, *u_sinfo = NULL;
|
|
struct socket *so;
|
|
struct file *fp = NULL;
|
|
int error = 0, len;
|
|
struct sockaddr *to = NULL;
|
|
#ifdef KTRACE
|
|
struct uio *ktruio = NULL;
|
|
#endif
|
|
struct uio auio;
|
|
struct iovec iov[1];
|
|
cap_rights_t rights;
|
|
|
|
if (uap->sinfo) {
|
|
error = copyin(uap->sinfo, &sinfo, sizeof (sinfo));
|
|
if (error)
|
|
return (error);
|
|
u_sinfo = &sinfo;
|
|
}
|
|
|
|
rights = CAP_WRITE;
|
|
if (uap->tolen) {
|
|
error = getsockaddr(&to, uap->to, uap->tolen);
|
|
if (error) {
|
|
to = NULL;
|
|
goto sctp_bad2;
|
|
}
|
|
rights |= CAP_CONNECT;
|
|
}
|
|
|
|
AUDIT_ARG_FD(uap->sd);
|
|
error = getsock_cap(td->td_proc->p_fd, uap->sd, rights, &fp, NULL);
|
|
if (error)
|
|
goto sctp_bad;
|
|
#ifdef KTRACE
|
|
if (to && (KTRPOINT(td, KTR_STRUCT)))
|
|
ktrsockaddr(to);
|
|
#endif
|
|
|
|
iov[0].iov_base = uap->msg;
|
|
iov[0].iov_len = uap->mlen;
|
|
|
|
so = (struct socket *)fp->f_data;
|
|
#ifdef MAC
|
|
error = mac_socket_check_send(td->td_ucred, so);
|
|
if (error)
|
|
goto sctp_bad;
|
|
#endif /* MAC */
|
|
|
|
auio.uio_iov = iov;
|
|
auio.uio_iovcnt = 1;
|
|
auio.uio_segflg = UIO_USERSPACE;
|
|
auio.uio_rw = UIO_WRITE;
|
|
auio.uio_td = td;
|
|
auio.uio_offset = 0; /* XXX */
|
|
auio.uio_resid = 0;
|
|
len = auio.uio_resid = uap->mlen;
|
|
CURVNET_SET(so->so_vnet);
|
|
error = sctp_lower_sosend(so, to, &auio,
|
|
(struct mbuf *)NULL, (struct mbuf *)NULL,
|
|
uap->flags, u_sinfo, td);
|
|
CURVNET_RESTORE();
|
|
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) &&
|
|
!(uap->flags & MSG_NOSIGNAL)) {
|
|
PROC_LOCK(td->td_proc);
|
|
tdsignal(td, SIGPIPE);
|
|
PROC_UNLOCK(td->td_proc);
|
|
}
|
|
}
|
|
if (error == 0)
|
|
td->td_retval[0] = len - auio.uio_resid;
|
|
#ifdef KTRACE
|
|
if (ktruio != NULL) {
|
|
ktruio->uio_resid = td->td_retval[0];
|
|
ktrgenio(uap->sd, UIO_WRITE, ktruio, error);
|
|
}
|
|
#endif /* KTRACE */
|
|
sctp_bad:
|
|
if (fp)
|
|
fdrop(fp, td);
|
|
sctp_bad2:
|
|
if (to)
|
|
free(to, M_SONAME);
|
|
return (error);
|
|
#else /* SCTP */
|
|
return (EOPNOTSUPP);
|
|
#endif /* SCTP */
|
|
}
|
|
|
|
int
|
|
sys_sctp_generic_sendmsg_iov(td, uap)
|
|
struct thread *td;
|
|
struct sctp_generic_sendmsg_iov_args /* {
|
|
int sd,
|
|
struct iovec *iov,
|
|
int iovlen,
|
|
caddr_t to,
|
|
__socklen_t tolen,
|
|
struct sctp_sndrcvinfo *sinfo,
|
|
int flags
|
|
} */ *uap;
|
|
{
|
|
#if (defined(INET) || defined(INET6)) && defined(SCTP)
|
|
struct sctp_sndrcvinfo sinfo, *u_sinfo = NULL;
|
|
struct socket *so;
|
|
struct file *fp = NULL;
|
|
int error=0, i;
|
|
ssize_t len;
|
|
struct sockaddr *to = NULL;
|
|
#ifdef KTRACE
|
|
struct uio *ktruio = NULL;
|
|
#endif
|
|
struct uio auio;
|
|
struct iovec *iov, *tiov;
|
|
cap_rights_t rights;
|
|
|
|
if (uap->sinfo) {
|
|
error = copyin(uap->sinfo, &sinfo, sizeof (sinfo));
|
|
if (error)
|
|
return (error);
|
|
u_sinfo = &sinfo;
|
|
}
|
|
rights = CAP_WRITE;
|
|
if (uap->tolen) {
|
|
error = getsockaddr(&to, uap->to, uap->tolen);
|
|
if (error) {
|
|
to = NULL;
|
|
goto sctp_bad2;
|
|
}
|
|
rights |= CAP_CONNECT;
|
|
}
|
|
|
|
AUDIT_ARG_FD(uap->sd);
|
|
error = getsock_cap(td->td_proc->p_fd, uap->sd, rights, &fp, NULL);
|
|
if (error)
|
|
goto sctp_bad1;
|
|
|
|
#ifdef COMPAT_FREEBSD32
|
|
if (SV_CURPROC_FLAG(SV_ILP32))
|
|
error = freebsd32_copyiniov((struct iovec32 *)uap->iov,
|
|
uap->iovlen, &iov, EMSGSIZE);
|
|
else
|
|
#endif
|
|
error = copyiniov(uap->iov, uap->iovlen, &iov, EMSGSIZE);
|
|
if (error)
|
|
goto sctp_bad1;
|
|
#ifdef KTRACE
|
|
if (to && (KTRPOINT(td, KTR_STRUCT)))
|
|
ktrsockaddr(to);
|
|
#endif
|
|
|
|
so = (struct socket *)fp->f_data;
|
|
#ifdef MAC
|
|
error = mac_socket_check_send(td->td_ucred, so);
|
|
if (error)
|
|
goto sctp_bad;
|
|
#endif /* MAC */
|
|
|
|
auio.uio_iov = iov;
|
|
auio.uio_iovcnt = uap->iovlen;
|
|
auio.uio_segflg = UIO_USERSPACE;
|
|
auio.uio_rw = UIO_WRITE;
|
|
auio.uio_td = td;
|
|
auio.uio_offset = 0; /* XXX */
|
|
auio.uio_resid = 0;
|
|
tiov = iov;
|
|
for (i = 0; i <uap->iovlen; i++, tiov++) {
|
|
if ((auio.uio_resid += tiov->iov_len) < 0) {
|
|
error = EINVAL;
|
|
goto sctp_bad;
|
|
}
|
|
}
|
|
len = auio.uio_resid;
|
|
CURVNET_SET(so->so_vnet);
|
|
error = sctp_lower_sosend(so, to, &auio,
|
|
(struct mbuf *)NULL, (struct mbuf *)NULL,
|
|
uap->flags, u_sinfo, td);
|
|
CURVNET_RESTORE();
|
|
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) &&
|
|
!(uap->flags & MSG_NOSIGNAL)) {
|
|
PROC_LOCK(td->td_proc);
|
|
tdsignal(td, SIGPIPE);
|
|
PROC_UNLOCK(td->td_proc);
|
|
}
|
|
}
|
|
if (error == 0)
|
|
td->td_retval[0] = len - auio.uio_resid;
|
|
#ifdef KTRACE
|
|
if (ktruio != NULL) {
|
|
ktruio->uio_resid = td->td_retval[0];
|
|
ktrgenio(uap->sd, UIO_WRITE, ktruio, error);
|
|
}
|
|
#endif /* KTRACE */
|
|
sctp_bad:
|
|
free(iov, M_IOV);
|
|
sctp_bad1:
|
|
if (fp)
|
|
fdrop(fp, td);
|
|
sctp_bad2:
|
|
if (to)
|
|
free(to, M_SONAME);
|
|
return (error);
|
|
#else /* SCTP */
|
|
return (EOPNOTSUPP);
|
|
#endif /* SCTP */
|
|
}
|
|
|
|
int
|
|
sys_sctp_generic_recvmsg(td, uap)
|
|
struct thread *td;
|
|
struct sctp_generic_recvmsg_args /* {
|
|
int sd,
|
|
struct iovec *iov,
|
|
int iovlen,
|
|
struct sockaddr *from,
|
|
__socklen_t *fromlenaddr,
|
|
struct sctp_sndrcvinfo *sinfo,
|
|
int *msg_flags
|
|
} */ *uap;
|
|
{
|
|
#if (defined(INET) || defined(INET6)) && defined(SCTP)
|
|
uint8_t sockbufstore[256];
|
|
struct uio auio;
|
|
struct iovec *iov, *tiov;
|
|
struct sctp_sndrcvinfo sinfo;
|
|
struct socket *so;
|
|
struct file *fp = NULL;
|
|
struct sockaddr *fromsa;
|
|
int fromlen;
|
|
ssize_t len;
|
|
int i, msg_flags;
|
|
int error = 0;
|
|
#ifdef KTRACE
|
|
struct uio *ktruio = NULL;
|
|
#endif
|
|
|
|
AUDIT_ARG_FD(uap->sd);
|
|
error = getsock_cap(td->td_proc->p_fd, uap->sd, CAP_READ, &fp, NULL);
|
|
if (error) {
|
|
return (error);
|
|
}
|
|
#ifdef COMPAT_FREEBSD32
|
|
if (SV_CURPROC_FLAG(SV_ILP32))
|
|
error = freebsd32_copyiniov((struct iovec32 *)uap->iov,
|
|
uap->iovlen, &iov, EMSGSIZE);
|
|
else
|
|
#endif
|
|
error = copyiniov(uap->iov, uap->iovlen, &iov, EMSGSIZE);
|
|
if (error)
|
|
goto out1;
|
|
|
|
so = fp->f_data;
|
|
#ifdef MAC
|
|
error = mac_socket_check_receive(td->td_ucred, so);
|
|
if (error) {
|
|
goto out;
|
|
}
|
|
#endif /* MAC */
|
|
|
|
if (uap->fromlenaddr) {
|
|
error = copyin(uap->fromlenaddr,
|
|
&fromlen, sizeof (fromlen));
|
|
if (error) {
|
|
goto out;
|
|
}
|
|
} else {
|
|
fromlen = 0;
|
|
}
|
|
if (uap->msg_flags) {
|
|
error = copyin(uap->msg_flags, &msg_flags, sizeof (int));
|
|
if (error) {
|
|
goto out;
|
|
}
|
|
} else {
|
|
msg_flags = 0;
|
|
}
|
|
auio.uio_iov = iov;
|
|
auio.uio_iovcnt = uap->iovlen;
|
|
auio.uio_segflg = UIO_USERSPACE;
|
|
auio.uio_rw = UIO_READ;
|
|
auio.uio_td = td;
|
|
auio.uio_offset = 0; /* XXX */
|
|
auio.uio_resid = 0;
|
|
tiov = iov;
|
|
for (i = 0; i <uap->iovlen; i++, tiov++) {
|
|
if ((auio.uio_resid += tiov->iov_len) < 0) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
}
|
|
len = auio.uio_resid;
|
|
fromsa = (struct sockaddr *)sockbufstore;
|
|
|
|
#ifdef KTRACE
|
|
if (KTRPOINT(td, KTR_GENIO))
|
|
ktruio = cloneuio(&auio);
|
|
#endif /* KTRACE */
|
|
memset(&sinfo, 0, sizeof(struct sctp_sndrcvinfo));
|
|
CURVNET_SET(so->so_vnet);
|
|
error = sctp_sorecvmsg(so, &auio, (struct mbuf **)NULL,
|
|
fromsa, fromlen, &msg_flags,
|
|
(struct sctp_sndrcvinfo *)&sinfo, 1);
|
|
CURVNET_RESTORE();
|
|
if (error) {
|
|
if (auio.uio_resid != len && (error == ERESTART ||
|
|
error == EINTR || error == EWOULDBLOCK))
|
|
error = 0;
|
|
} else {
|
|
if (uap->sinfo)
|
|
error = copyout(&sinfo, uap->sinfo, sizeof (sinfo));
|
|
}
|
|
#ifdef KTRACE
|
|
if (ktruio != NULL) {
|
|
ktruio->uio_resid = len - auio.uio_resid;
|
|
ktrgenio(uap->sd, UIO_READ, ktruio, error);
|
|
}
|
|
#endif /* KTRACE */
|
|
if (error)
|
|
goto out;
|
|
td->td_retval[0] = len - auio.uio_resid;
|
|
|
|
if (fromlen && uap->from) {
|
|
len = fromlen;
|
|
if (len <= 0 || fromsa == 0)
|
|
len = 0;
|
|
else {
|
|
len = MIN(len, fromsa->sa_len);
|
|
error = copyout(fromsa, uap->from, (size_t)len);
|
|
if (error)
|
|
goto out;
|
|
}
|
|
error = copyout(&len, uap->fromlenaddr, sizeof (socklen_t));
|
|
if (error) {
|
|
goto out;
|
|
}
|
|
}
|
|
#ifdef KTRACE
|
|
if (KTRPOINT(td, KTR_STRUCT))
|
|
ktrsockaddr(fromsa);
|
|
#endif
|
|
if (uap->msg_flags) {
|
|
error = copyout(&msg_flags, uap->msg_flags, sizeof (int));
|
|
if (error) {
|
|
goto out;
|
|
}
|
|
}
|
|
out:
|
|
free(iov, M_IOV);
|
|
out1:
|
|
if (fp)
|
|
fdrop(fp, td);
|
|
|
|
return (error);
|
|
#else /* SCTP */
|
|
return (EOPNOTSUPP);
|
|
#endif /* SCTP */
|
|
}
|