2005-04-16 18:20:36 -04:00
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/* $Id: socksys.c,v 1.21 2002/02/08 03:57:14 davem Exp $
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* socksys.c: /dev/inet/ stuff for Solaris emulation.
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*
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* Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
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* Copyright (C) 1997, 1998 Patrik Rak (prak3264@ss1000.ms.mff.cuni.cz)
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* Copyright (C) 1995, 1996 Mike Jagdis (jaggy@purplet.demon.co.uk)
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*/
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/*
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* Dave, _please_ give me specifications on this fscking mess so that I
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* could at least get it into the state when it wouldn't screw the rest of
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* the kernel over. socksys.c and timod.c _stink_ and we are not talking
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* H2S here, it's isopropilmercaptan in concentrations way over LD50. -- AV
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*/
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/smp.h>
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#include <linux/ioctl.h>
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#include <linux/fs.h>
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#include <linux/file.h>
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#include <linux/init.h>
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#include <linux/poll.h>
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#include <linux/slab.h>
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#include <linux/syscalls.h>
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#include <linux/in.h>
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#include <net/sock.h>
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#include <asm/uaccess.h>
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#include <asm/termios.h>
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#include "conv.h"
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#include "socksys.h"
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static int af_inet_protocols[] = {
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IPPROTO_ICMP, IPPROTO_ICMP, IPPROTO_IGMP, IPPROTO_IPIP, IPPROTO_TCP,
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IPPROTO_EGP, IPPROTO_PUP, IPPROTO_UDP, IPPROTO_IDP, IPPROTO_RAW,
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0, 0, 0, 0, 0, 0,
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};
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#ifndef DEBUG_SOLARIS_KMALLOC
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#define mykmalloc kmalloc
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#define mykfree kfree
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#else
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2005-10-21 03:22:24 -04:00
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extern void * mykmalloc(size_t s, gfp_t gfp);
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2005-04-16 18:20:36 -04:00
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extern void mykfree(void *);
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#endif
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static unsigned int (*sock_poll)(struct file *, poll_table *);
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static struct file_operations socksys_file_ops = {
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/* Currently empty */
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};
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static int socksys_open(struct inode * inode, struct file * filp)
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{
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int family, type, protocol, fd;
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struct dentry *dentry;
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int (*sys_socket)(int,int,int) =
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(int (*)(int,int,int))SUNOS(97);
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struct sol_socket_struct * sock;
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family = ((iminor(inode) >> 4) & 0xf);
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switch (family) {
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case AF_UNIX:
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type = SOCK_STREAM;
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protocol = 0;
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break;
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case AF_INET:
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protocol = af_inet_protocols[iminor(inode) & 0xf];
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switch (protocol) {
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case IPPROTO_TCP: type = SOCK_STREAM; break;
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case IPPROTO_UDP: type = SOCK_DGRAM; break;
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default: type = SOCK_RAW; break;
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}
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break;
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default:
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type = SOCK_RAW;
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protocol = 0;
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break;
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}
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fd = sys_socket(family, type, protocol);
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if (fd < 0)
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return fd;
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/*
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* N.B. The following operations are not legal!
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*
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* No shit. WTF is it supposed to do, anyway?
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*
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* Try instead:
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2006-12-08 05:37:41 -05:00
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* d_delete(filp->f_path.dentry), then d_instantiate with sock inode
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2005-04-16 18:20:36 -04:00
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*/
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2006-12-08 05:37:41 -05:00
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dentry = filp->f_path.dentry;
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filp->f_path.dentry = dget(fcheck(fd)->f_path.dentry);
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filp->f_path.dentry->d_inode->i_rdev = inode->i_rdev;
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filp->f_path.dentry->d_inode->i_flock = inode->i_flock;
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SOCKET_I(filp->f_path.dentry->d_inode)->file = filp;
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2005-04-16 18:20:36 -04:00
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filp->f_op = &socksys_file_ops;
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sock = (struct sol_socket_struct*)
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mykmalloc(sizeof(struct sol_socket_struct), GFP_KERNEL);
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if (!sock) return -ENOMEM;
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SOLDD(("sock=%016lx(%016lx)\n", sock, filp));
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sock->magic = SOLARIS_SOCKET_MAGIC;
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sock->modcount = 0;
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sock->state = TS_UNBND;
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sock->offset = 0;
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sock->pfirst = sock->plast = NULL;
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filp->private_data = sock;
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SOLDD(("filp->private_data %016lx\n", filp->private_data));
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sys_close(fd);
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dput(dentry);
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return 0;
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}
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static int socksys_release(struct inode * inode, struct file * filp)
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{
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struct sol_socket_struct * sock;
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struct T_primsg *it;
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/* XXX: check this */
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sock = (struct sol_socket_struct *)filp->private_data;
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SOLDD(("sock release %016lx(%016lx)\n", sock, filp));
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it = sock->pfirst;
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while (it) {
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struct T_primsg *next = it->next;
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SOLDD(("socksys_release %016lx->%016lx\n", it, next));
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mykfree((char*)it);
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it = next;
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}
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filp->private_data = NULL;
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SOLDD(("socksys_release %016lx\n", sock));
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mykfree((char*)sock);
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return 0;
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}
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static unsigned int socksys_poll(struct file * filp, poll_table * wait)
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{
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struct inode *ino;
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unsigned int mask = 0;
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2006-12-08 05:37:41 -05:00
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ino=filp->f_path.dentry->d_inode;
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2005-04-16 18:20:36 -04:00
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if (ino && S_ISSOCK(ino->i_mode)) {
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struct sol_socket_struct *sock;
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sock = (struct sol_socket_struct*)filp->private_data;
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if (sock && sock->pfirst) {
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mask |= POLLIN | POLLRDNORM;
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if (sock->pfirst->pri == MSG_HIPRI)
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mask |= POLLPRI;
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}
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}
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if (sock_poll)
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mask |= (*sock_poll)(filp, wait);
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return mask;
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}
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2007-02-12 03:55:31 -05:00
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static const struct file_operations socksys_fops = {
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2005-04-16 18:20:36 -04:00
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.open = socksys_open,
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.release = socksys_release,
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};
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2006-09-25 17:00:45 -04:00
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int __init init_socksys(void)
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2005-04-16 18:20:36 -04:00
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{
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int ret;
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struct file * file;
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int (*sys_socket)(int,int,int) =
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(int (*)(int,int,int))SUNOS(97);
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int (*sys_close)(unsigned int) =
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(int (*)(unsigned int))SYS(close);
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ret = register_chrdev (30, "socksys", &socksys_fops);
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if (ret < 0) {
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printk ("Couldn't register socksys character device\n");
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return ret;
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}
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ret = sys_socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
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if (ret < 0) {
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printk ("Couldn't create socket\n");
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return ret;
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}
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file = fcheck(ret);
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/* N.B. Is this valid? Suppose the f_ops are in a module ... */
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socksys_file_ops = *file->f_op;
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sys_close(ret);
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sock_poll = socksys_file_ops.poll;
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socksys_file_ops.poll = socksys_poll;
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socksys_file_ops.release = socksys_release;
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return 0;
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}
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2006-09-25 17:00:45 -04:00
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void __exit cleanup_socksys(void)
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2005-04-16 18:20:36 -04:00
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{
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if (unregister_chrdev(30, "socksys"))
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printk ("Couldn't unregister socksys character device\n");
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}
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