8451d0dd78
patch modifies makesyscalls.sh to prefix all of the non-compatibility calls (e.g. not linux_, freebsd32_) with sys_ and updates the kernel entry points and all places in the code that use them. It also fixes an additional name space collision between the kernel function psignal and the libc function of the same name by renaming the kernel psignal kern_psignal(). By introducing this change now we will ease future MFCs that change syscalls. Reviewed by: rwatson Approved by: re (bz)
243 lines
6.9 KiB
C
243 lines
6.9 KiB
C
/*-
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* Copyright (c) 1998 Mark Newton
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* Copyright (c) 1996 Christos Zoulas.
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* 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Christos Zoulas.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* In SVR4 unix domain sockets are referenced sometimes
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* (in putmsg(2) for example) as a [device, inode] pair instead of a pathname.
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* Since there is no iname() routine in the kernel, and we need access to
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* a mapping from inode to pathname, we keep our own table. This is a simple
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* linked list that contains the pathname, the [device, inode] pair, the
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* file corresponding to that socket and the process. When the
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* socket gets closed we remove the item from the list. The list gets loaded
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* every time a stat(2) call finds a socket.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/queue.h>
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#include <sys/eventhandler.h>
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#include <sys/file.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/socket.h>
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#include <sys/socketvar.h>
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#include <sys/sysproto.h>
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#include <sys/un.h>
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#include <sys/stat.h>
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#include <sys/proc.h>
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#include <sys/malloc.h>
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#include <compat/svr4/svr4.h>
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#include <compat/svr4/svr4_types.h>
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#include <compat/svr4/svr4_util.h>
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#include <compat/svr4/svr4_socket.h>
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#include <compat/svr4/svr4_signal.h>
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#include <compat/svr4/svr4_sockmod.h>
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#include <compat/svr4/svr4_proto.h>
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struct svr4_sockcache_entry {
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struct proc *p; /* Process for the socket */
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void *cookie; /* Internal cookie used for matching */
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struct sockaddr_un sock;/* Pathname for the socket */
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dev_t dev; /* Device where the socket lives on */
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ino_t ino; /* Inode where the socket lives on */
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TAILQ_ENTRY(svr4_sockcache_entry) entries;
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};
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static TAILQ_HEAD(, svr4_sockcache_entry) svr4_head;
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static struct mtx svr4_sockcache_lock;
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static eventhandler_tag svr4_sockcache_exit_tag, svr4_sockcache_exec_tag;
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static void svr4_purge_sockcache(void *arg, struct proc *p);
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int
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svr4_find_socket(td, fp, dev, ino, saun)
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struct thread *td;
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struct file *fp;
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dev_t dev;
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ino_t ino;
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struct sockaddr_un *saun;
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{
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struct svr4_sockcache_entry *e;
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void *cookie = ((struct socket *)fp->f_data)->so_emuldata;
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DPRINTF(("svr4_find_socket: [%p,%d,%d]: ", td, dev, ino));
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mtx_lock(&svr4_sockcache_lock);
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TAILQ_FOREACH(e, &svr4_head, entries)
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if (e->p == td->td_proc && e->dev == dev && e->ino == ino) {
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#ifdef DIAGNOSTIC
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if (e->cookie != NULL && e->cookie != cookie)
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panic("svr4 socket cookie mismatch");
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#endif
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e->cookie = cookie;
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DPRINTF(("%s\n", e->sock.sun_path));
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*saun = e->sock;
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mtx_unlock(&svr4_sockcache_lock);
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return (0);
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}
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mtx_unlock(&svr4_sockcache_lock);
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DPRINTF(("not found\n"));
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return (ENOENT);
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}
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int
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svr4_add_socket(td, path, st)
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struct thread *td;
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const char *path;
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struct stat *st;
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{
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struct svr4_sockcache_entry *e;
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size_t len;
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int error;
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e = malloc(sizeof(*e), M_TEMP, M_WAITOK);
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e->cookie = NULL;
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e->dev = st->st_dev;
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e->ino = st->st_ino;
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e->p = td->td_proc;
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if ((error = copyinstr(path, e->sock.sun_path,
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sizeof(e->sock.sun_path), &len)) != 0) {
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DPRINTF(("svr4_add_socket: copyinstr failed %d\n", error));
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free(e, M_TEMP);
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return error;
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}
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e->sock.sun_family = AF_LOCAL;
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e->sock.sun_len = len;
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mtx_lock(&svr4_sockcache_lock);
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TAILQ_INSERT_HEAD(&svr4_head, e, entries);
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mtx_unlock(&svr4_sockcache_lock);
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DPRINTF(("svr4_add_socket: %s [%p,%d,%d]\n", e->sock.sun_path,
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td->td_proc, e->dev, e->ino));
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return 0;
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}
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void
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svr4_delete_socket(p, fp)
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struct proc *p;
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struct file *fp;
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{
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struct svr4_sockcache_entry *e;
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void *cookie = ((struct socket *)fp->f_data)->so_emuldata;
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mtx_lock(&svr4_sockcache_lock);
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TAILQ_FOREACH(e, &svr4_head, entries)
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if (e->p == p && e->cookie == cookie) {
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TAILQ_REMOVE(&svr4_head, e, entries);
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mtx_unlock(&svr4_sockcache_lock);
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DPRINTF(("svr4_delete_socket: %s [%p,%d,%d]\n",
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e->sock.sun_path, p, (int)e->dev, e->ino));
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free(e, M_TEMP);
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return;
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}
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mtx_unlock(&svr4_sockcache_lock);
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}
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void
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svr4_purge_sockcache(arg, p)
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void *arg;
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struct proc *p;
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{
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struct svr4_sockcache_entry *e, *ne;
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mtx_lock(&svr4_sockcache_lock);
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TAILQ_FOREACH_SAFE(e, &svr4_head, entries, ne) {
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if (e->p == p) {
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TAILQ_REMOVE(&svr4_head, e, entries);
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DPRINTF(("svr4_purge_sockcache: %s [%p,%d,%d]\n",
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e->sock.sun_path, p, (int)e->dev, e->ino));
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free(e, M_TEMP);
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}
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}
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mtx_unlock(&svr4_sockcache_lock);
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}
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void
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svr4_sockcache_init(void)
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{
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TAILQ_INIT(&svr4_head);
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mtx_init(&svr4_sockcache_lock, "svr4 socket cache", NULL, MTX_DEF);
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svr4_sockcache_exit_tag = EVENTHANDLER_REGISTER(process_exit,
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svr4_purge_sockcache, NULL, EVENTHANDLER_PRI_ANY);
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svr4_sockcache_exec_tag = EVENTHANDLER_REGISTER(process_exec,
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svr4_purge_sockcache, NULL, EVENTHANDLER_PRI_ANY);
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}
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void
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svr4_sockcache_destroy(void)
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{
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KASSERT(TAILQ_EMPTY(&svr4_head),
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("%s: sockcache entries still around", __func__));
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EVENTHANDLER_DEREGISTER(process_exec, svr4_sockcache_exec_tag);
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EVENTHANDLER_DEREGISTER(process_exit, svr4_sockcache_exit_tag);
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mtx_destroy(&svr4_sockcache_lock);
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}
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int
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svr4_sys_socket(td, uap)
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struct thread *td;
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struct svr4_sys_socket_args *uap;
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{
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switch (uap->type) {
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case SVR4_SOCK_DGRAM:
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uap->type = SOCK_DGRAM;
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break;
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case SVR4_SOCK_STREAM:
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uap->type = SOCK_STREAM;
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break;
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case SVR4_SOCK_RAW:
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uap->type = SOCK_RAW;
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break;
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case SVR4_SOCK_RDM:
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uap->type = SOCK_RDM;
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break;
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case SVR4_SOCK_SEQPACKET:
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uap->type = SOCK_SEQPACKET;
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break;
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default:
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return EINVAL;
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}
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return sys_socket(td, (struct socket_args *)uap);
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}
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