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/* $Id: socksys.c,v 1.21 2002/02/08 03:57:14 davem Exp $
* socksys.c: /dev/inet/ stuff for Solaris emulation.
*
* Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
* Copyright (C) 1997, 1998 Patrik Rak (prak3264@ss1000.ms.mff.cuni.cz)
* Copyright (C) 1995, 1996 Mike Jagdis (jaggy@purplet.demon.co.uk)
*/
/*
* Dave, _please_ give me specifications on this fscking mess so that I
* could at least get it into the state when it wouldn't screw the rest of
* the kernel over. socksys.c and timod.c _stink_ and we are not talking
* H2S here, it's isopropilmercaptan in concentrations way over LD50. -- AV
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/ioctl.h>
#include <linux/fs.h>
#include <linux/file.h>
#include <linux/init.h>
#include <linux/poll.h>
#include <linux/slab.h>
#include <linux/syscalls.h>
#include <linux/in.h>
#include <net/sock.h>
#include <asm/uaccess.h>
#include <asm/termios.h>
#include "conv.h"
#include "socksys.h"
static int af_inet_protocols[] = {
IPPROTO_ICMP, IPPROTO_ICMP, IPPROTO_IGMP, IPPROTO_IPIP, IPPROTO_TCP,
IPPROTO_EGP, IPPROTO_PUP, IPPROTO_UDP, IPPROTO_IDP, IPPROTO_RAW,
0, 0, 0, 0, 0, 0,
};
#ifndef DEBUG_SOLARIS_KMALLOC
#define mykmalloc kmalloc
#define mykfree kfree
#else
extern void * mykmalloc(size_t s, gfp_t gfp);
extern void mykfree(void *);
#endif
static unsigned int (*sock_poll)(struct file *, poll_table *);
static struct file_operations socksys_file_ops = {
/* Currently empty */
};
static int socksys_open(struct inode * inode, struct file * filp)
{
int family, type, protocol, fd;
struct dentry *dentry;
int (*sys_socket)(int,int,int) =
(int (*)(int,int,int))SUNOS(97);
struct sol_socket_struct * sock;
family = ((iminor(inode) >> 4) & 0xf);
switch (family) {
case AF_UNIX:
type = SOCK_STREAM;
protocol = 0;
break;
case AF_INET:
protocol = af_inet_protocols[iminor(inode) & 0xf];
switch (protocol) {
case IPPROTO_TCP: type = SOCK_STREAM; break;
case IPPROTO_UDP: type = SOCK_DGRAM; break;
default: type = SOCK_RAW; break;
}
break;
default:
type = SOCK_RAW;
protocol = 0;
break;
}
fd = sys_socket(family, type, protocol);
if (fd < 0)
return fd;
/*
* N.B. The following operations are not legal!
*
* No shit. WTF is it supposed to do, anyway?
*
* Try instead:
* d_delete(filp->f_path.dentry), then d_instantiate with sock inode
*/
dentry = filp->f_path.dentry;
filp->f_path.dentry = dget(fcheck(fd)->f_path.dentry);
filp->f_path.dentry->d_inode->i_rdev = inode->i_rdev;
filp->f_path.dentry->d_inode->i_flock = inode->i_flock;
SOCKET_I(filp->f_path.dentry->d_inode)->file = filp;
filp->f_op = &socksys_file_ops;
sock = (struct sol_socket_struct*)
mykmalloc(sizeof(struct sol_socket_struct), GFP_KERNEL);
if (!sock) return -ENOMEM;
SOLDD(("sock=%016lx(%016lx)\n", sock, filp));
sock->magic = SOLARIS_SOCKET_MAGIC;
sock->modcount = 0;
sock->state = TS_UNBND;
sock->offset = 0;
sock->pfirst = sock->plast = NULL;
filp->private_data = sock;
SOLDD(("filp->private_data %016lx\n", filp->private_data));
sys_close(fd);
dput(dentry);
return 0;
}
static int socksys_release(struct inode * inode, struct file * filp)
{
struct sol_socket_struct * sock;
struct T_primsg *it;
/* XXX: check this */
sock = (struct sol_socket_struct *)filp->private_data;
SOLDD(("sock release %016lx(%016lx)\n", sock, filp));
it = sock->pfirst;
while (it) {
struct T_primsg *next = it->next;
SOLDD(("socksys_release %016lx->%016lx\n", it, next));
mykfree((char*)it);
it = next;
}
filp->private_data = NULL;
SOLDD(("socksys_release %016lx\n", sock));
mykfree((char*)sock);
return 0;
}
static unsigned int socksys_poll(struct file * filp, poll_table * wait)
{
struct inode *ino;
unsigned int mask = 0;
ino=filp->f_path.dentry->d_inode;
if (ino && S_ISSOCK(ino->i_mode)) {
struct sol_socket_struct *sock;
sock = (struct sol_socket_struct*)filp->private_data;
if (sock && sock->pfirst) {
mask |= POLLIN | POLLRDNORM;
if (sock->pfirst->pri == MSG_HIPRI)
mask |= POLLPRI;
}
}
if (sock_poll)
mask |= (*sock_poll)(filp, wait);
return mask;
}
static struct file_operations socksys_fops = {
.open = socksys_open,
.release = socksys_release,
};
int __init init_socksys(void)
{
int ret;
struct file * file;
int (*sys_socket)(int,int,int) =
(int (*)(int,int,int))SUNOS(97);
int (*sys_close)(unsigned int) =
(int (*)(unsigned int))SYS(close);
ret = register_chrdev (30, "socksys", &socksys_fops);
if (ret < 0) {
printk ("Couldn't register socksys character device\n");
return ret;
}
ret = sys_socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (ret < 0) {
printk ("Couldn't create socket\n");
return ret;
}
file = fcheck(ret);
/* N.B. Is this valid? Suppose the f_ops are in a module ... */
socksys_file_ops = *file->f_op;
sys_close(ret);
sock_poll = socksys_file_ops.poll;
socksys_file_ops.poll = socksys_poll;
socksys_file_ops.release = socksys_release;
return 0;
}
void __exit cleanup_socksys(void)
{
if (unregister_chrdev(30, "socksys"))
printk ("Couldn't unregister socksys character device\n");
}
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