proc->thread stage 4: rework the VFS and DEVICE subsystems to take thread
[dragonfly.git] / sys / emulation / svr4 / svr4_socket.c
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1/*
2 * Copyright (c) 1998 Mark Newton
3 * Copyright (c) 1996 Christos Zoulas.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by Christos Zoulas.
17 * 4. The name of the author may not be used to endorse or promote products
18 * derived from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 *
31 * $FreeBSD: src/sys/svr4/svr4_socket.c,v 1.7 1999/12/08 12:00:48 newton Exp $
dadab5e9 32 * $DragonFly: src/sys/emulation/svr4/Attic/svr4_socket.c,v 1.4 2003/06/25 03:56:10 dillon Exp $
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33 */
34
35/*
36 * In SVR4 unix domain sockets are referenced sometimes
37 * (in putmsg(2) for example) as a [device, inode] pair instead of a pathname.
38 * Since there is no iname() routine in the kernel, and we need access to
39 * a mapping from inode to pathname, we keep our own table. This is a simple
40 * linked list that contains the pathname, the [device, inode] pair, the
41 * file corresponding to that socket and the process. When the
42 * socket gets closed we remove the item from the list. The list gets loaded
43 * every time a stat(2) call finds a socket.
44 */
45
46#include <sys/param.h>
47#include <sys/systm.h>
48#include <sys/queue.h>
49#include <sys/file.h>
50#include <sys/socket.h>
51#include <sys/socketvar.h>
52#include <sys/sysproto.h>
53#include <sys/un.h>
54#include <sys/stat.h>
55#include <sys/proc.h>
56#include <sys/malloc.h>
57
58#include <svr4/svr4.h>
59#include <svr4/svr4_types.h>
60#include <svr4/svr4_util.h>
61#include <svr4/svr4_socket.h>
62#include <svr4/svr4_signal.h>
63#include <svr4/svr4_sockmod.h>
64#include <svr4/svr4_proto.h>
65
66struct svr4_sockcache_entry {
dadab5e9 67 struct thread *td; /* Process for the socket */
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68 void *cookie; /* Internal cookie used for matching */
69 struct sockaddr_un sock;/* Pathname for the socket */
70 udev_t dev; /* Device where the socket lives on */
71 ino_t ino; /* Inode where the socket lives on */
72 TAILQ_ENTRY(svr4_sockcache_entry) entries;
73};
74
75extern TAILQ_HEAD(svr4_sockcache_head, svr4_sockcache_entry) svr4_head;
76extern int svr4_str_initialized;
77
78struct sockaddr_un *
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79svr4_find_socket(td, fp, dev, ino)
80 struct thread *td;
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81 struct file *fp;
82 udev_t dev;
83 ino_t ino;
84{
85 struct svr4_sockcache_entry *e;
86 void *cookie = ((struct socket *) fp->f_data)->so_emuldata;
87
88 if (!svr4_str_initialized) {
89 DPRINTF(("svr4_find_socket: uninitialized [%p,%d,%d]\n",
dadab5e9 90 td, dev, ino));
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91 TAILQ_INIT(&svr4_head);
92 svr4_str_initialized = 1;
93 return NULL;
94 }
95
96
dadab5e9 97 DPRINTF(("svr4_find_socket: [%p,%d,%d]: ", td, dev, ino));
984263bc 98 for (e = svr4_head.tqh_first; e != NULL; e = e->entries.tqe_next)
dadab5e9 99 if (e->td == td && e->dev == dev && e->ino == ino) {
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100#ifdef DIAGNOSTIC
101 if (e->cookie != NULL && e->cookie != cookie)
102 panic("svr4 socket cookie mismatch");
103#endif
104 e->cookie = cookie;
105 DPRINTF(("%s\n", e->sock.sun_path));
106 return &e->sock;
107 }
108
109 DPRINTF(("not found\n"));
110 return NULL;
111}
112
113
114/*
115 * svr4_delete_socket() is in sys/dev/streams.c (because it's called by
116 * the streams "soo_close()" routine).
117 */
118int
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119svr4_add_socket(td, path, st)
120 struct thread *td;
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121 const char *path;
122 struct stat *st;
123{
124 struct svr4_sockcache_entry *e;
125 int len, error;
126
127 if (!svr4_str_initialized) {
128 TAILQ_INIT(&svr4_head);
129 svr4_str_initialized = 1;
130 }
131
132 e = malloc(sizeof(*e), M_TEMP, M_WAITOK);
133 e->cookie = NULL;
134 e->dev = st->st_dev;
135 e->ino = st->st_ino;
dadab5e9 136 e->td = td;
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137
138 if ((error = copyinstr(path, e->sock.sun_path,
139 sizeof(e->sock.sun_path), &len)) != 0) {
140 DPRINTF(("svr4_add_socket: copyinstr failed %d\n", error));
141 free(e, M_TEMP);
142 return error;
143 }
144
145 e->sock.sun_family = AF_LOCAL;
146 e->sock.sun_len = len;
147
148 TAILQ_INSERT_HEAD(&svr4_head, e, entries);
149 DPRINTF(("svr4_add_socket: %s [%p,%d,%d]\n", e->sock.sun_path,
dadab5e9 150 td, e->dev, e->ino));
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151 return 0;
152}
153
154
155int
41c20dac 156svr4_sys_socket(struct svr4_sys_socket_args *uap)
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157{
158 switch (SCARG(uap, type)) {
159 case SVR4_SOCK_DGRAM:
160 SCARG(uap, type) = SOCK_DGRAM;
161 break;
162
163 case SVR4_SOCK_STREAM:
164 SCARG(uap, type) = SOCK_STREAM;
165 break;
166
167 case SVR4_SOCK_RAW:
168 SCARG(uap, type) = SOCK_RAW;
169 break;
170
171 case SVR4_SOCK_RDM:
172 SCARG(uap, type) = SOCK_RDM;
173 break;
174
175 case SVR4_SOCK_SEQPACKET:
176 SCARG(uap, type) = SOCK_SEQPACKET;
177 break;
178 default:
179 return EINVAL;
180 }
41c20dac 181 return socket((struct socket_args *)uap);
984263bc 182}