mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-23 11:18:54 +00:00
183 lines
5.4 KiB
C
183 lines
5.4 KiB
C
/*-
|
|
* Copyright (c) 1998 Mark Newton
|
|
* Copyright (c) 1996 Christos Zoulas.
|
|
* 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 Christos Zoulas.
|
|
* 4. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
|
|
*/
|
|
|
|
/*
|
|
* In SVR4 unix domain sockets are referenced sometimes
|
|
* (in putmsg(2) for example) as a [device, inode] pair instead of a pathname.
|
|
* Since there is no iname() routine in the kernel, and we need access to
|
|
* a mapping from inode to pathname, we keep our own table. This is a simple
|
|
* linked list that contains the pathname, the [device, inode] pair, the
|
|
* file corresponding to that socket and the process. When the
|
|
* socket gets closed we remove the item from the list. The list gets loaded
|
|
* every time a stat(2) call finds a socket.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/queue.h>
|
|
#include <sys/file.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/socketvar.h>
|
|
#include <sys/sysproto.h>
|
|
#include <sys/un.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/malloc.h>
|
|
|
|
#include <compat/svr4/svr4.h>
|
|
#include <compat/svr4/svr4_types.h>
|
|
#include <compat/svr4/svr4_util.h>
|
|
#include <compat/svr4/svr4_socket.h>
|
|
#include <compat/svr4/svr4_signal.h>
|
|
#include <compat/svr4/svr4_sockmod.h>
|
|
#include <compat/svr4/svr4_proto.h>
|
|
|
|
struct sockaddr_un *
|
|
svr4_find_socket(td, fp, dev, ino)
|
|
struct thread *td;
|
|
struct file *fp;
|
|
dev_t dev;
|
|
ino_t ino;
|
|
{
|
|
struct svr4_sockcache_entry *e;
|
|
void *cookie = ((struct socket *)fp->f_data)->so_emuldata;
|
|
|
|
if (svr4_str_initialized != 2) {
|
|
if (atomic_cmpset_acq_int(&svr4_str_initialized, 0, 1)) {
|
|
DPRINTF(("svr4_find_socket: uninitialized [%p,%d,%d]\n",
|
|
td, dev, ino));
|
|
TAILQ_INIT(&svr4_head);
|
|
atomic_store_rel_int(&svr4_str_initialized, 2);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
|
|
DPRINTF(("svr4_find_socket: [%p,%d,%d]: ", td, dev, ino));
|
|
TAILQ_FOREACH(e, &svr4_head, entries)
|
|
if (e->p == td->td_proc && e->dev == dev && e->ino == ino) {
|
|
#ifdef DIAGNOSTIC
|
|
if (e->cookie != NULL && e->cookie != cookie)
|
|
panic("svr4 socket cookie mismatch");
|
|
#endif
|
|
e->cookie = cookie;
|
|
DPRINTF(("%s\n", e->sock.sun_path));
|
|
return &e->sock;
|
|
}
|
|
|
|
DPRINTF(("not found\n"));
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/*
|
|
* svr4_delete_socket() is in sys/dev/streams.c (because it's called by
|
|
* the streams "soo_close()" routine).
|
|
*/
|
|
int
|
|
svr4_add_socket(td, path, st)
|
|
struct thread *td;
|
|
const char *path;
|
|
struct stat *st;
|
|
{
|
|
struct svr4_sockcache_entry *e;
|
|
int len, error;
|
|
|
|
/*
|
|
* Wait for the TAILQ to be initialized. Only the very first CPU
|
|
* will succeed on the atomic_cmpset(). The other CPU's will spin
|
|
* until the first one finishes the initialization. Once the
|
|
* initialization is complete, the condition will always fail
|
|
* avoiding expensive atomic operations in the common case.
|
|
*/
|
|
while (svr4_str_initialized != 2)
|
|
if (atomic_cmpset_acq_int(&svr4_str_initialized, 0, 1)) {
|
|
TAILQ_INIT(&svr4_head);
|
|
atomic_store_rel_int(&svr4_str_initialized, 2);
|
|
}
|
|
|
|
e = malloc(sizeof(*e), M_TEMP, M_WAITOK);
|
|
e->cookie = NULL;
|
|
e->dev = st->st_dev;
|
|
e->ino = st->st_ino;
|
|
e->p = td->td_proc;
|
|
|
|
if ((error = copyinstr(path, e->sock.sun_path,
|
|
sizeof(e->sock.sun_path), &len)) != 0) {
|
|
DPRINTF(("svr4_add_socket: copyinstr failed %d\n", error));
|
|
free(e, M_TEMP);
|
|
return error;
|
|
}
|
|
|
|
e->sock.sun_family = AF_LOCAL;
|
|
e->sock.sun_len = len;
|
|
|
|
TAILQ_INSERT_HEAD(&svr4_head, e, entries);
|
|
DPRINTF(("svr4_add_socket: %s [%p,%d,%d]\n", e->sock.sun_path,
|
|
td->td_proc, e->dev, e->ino));
|
|
return 0;
|
|
}
|
|
|
|
|
|
int
|
|
svr4_sys_socket(td, uap)
|
|
struct thread *td;
|
|
struct svr4_sys_socket_args *uap;
|
|
{
|
|
switch (uap->type) {
|
|
case SVR4_SOCK_DGRAM:
|
|
uap->type = SOCK_DGRAM;
|
|
break;
|
|
|
|
case SVR4_SOCK_STREAM:
|
|
uap->type = SOCK_STREAM;
|
|
break;
|
|
|
|
case SVR4_SOCK_RAW:
|
|
uap->type = SOCK_RAW;
|
|
break;
|
|
|
|
case SVR4_SOCK_RDM:
|
|
uap->type = SOCK_RDM;
|
|
break;
|
|
|
|
case SVR4_SOCK_SEQPACKET:
|
|
uap->type = SOCK_SEQPACKET;
|
|
break;
|
|
default:
|
|
return EINVAL;
|
|
}
|
|
return socket(td, (struct socket_args *)uap);
|
|
}
|