diff options
Diffstat (limited to 'net/netlink/netlink_dev.c')
| -rw-r--r-- | net/netlink/netlink_dev.c | 278 |
1 files changed, 0 insertions, 278 deletions
diff --git a/net/netlink/netlink_dev.c b/net/netlink/netlink_dev.c deleted file mode 100644 index 59f53de4b86b..000000000000 --- a/net/netlink/netlink_dev.c +++ /dev/null @@ -1,278 +0,0 @@ -/* - * NETLINK An implementation of a loadable kernel mode driver providing - * multiple kernel/user space bidirectional communications links. - * - * Author: Alan Cox <alan@redhat.com> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * - * Now netlink devices are emulated on the top of netlink sockets - * by compatibility reasons. Remove this file after a period. --ANK - * - */ - -#include <linux/module.h> - -#include <linux/errno.h> -#include <linux/kernel.h> -#include <linux/major.h> -#include <linux/sched.h> -#include <linux/slab.h> -#include <linux/skbuff.h> -#include <linux/netlink.h> -#include <linux/poll.h> -#include <linux/init.h> -#include <linux/devfs_fs_kernel.h> -#include <linux/smp_lock.h> -#include <linux/device.h> -#include <linux/bitops.h> - -#include <asm/system.h> -#include <asm/uaccess.h> - -static long open_map; -static struct socket *netlink_user[MAX_LINKS]; -static struct class_simple *netlink_class; - -/* - * Device operations - */ - -static unsigned int netlink_poll(struct file *file, poll_table * wait) -{ - struct socket *sock = netlink_user[iminor(file->f_dentry->d_inode)]; - - if (sock->ops->poll==NULL) - return 0; - return sock->ops->poll(file, sock, wait); -} - -/* - * Write a message to the kernel side of a communication link - */ - -static ssize_t netlink_write(struct file * file, const char __user * buf, - size_t count, loff_t *pos) -{ - struct inode *inode = file->f_dentry->d_inode; - struct socket *sock = netlink_user[iminor(inode)]; - struct msghdr msg; - struct iovec iov; - - iov.iov_base = (void __user*)buf; - iov.iov_len = count; - msg.msg_name=NULL; - msg.msg_namelen=0; - msg.msg_controllen=0; - msg.msg_flags=0; - msg.msg_iov=&iov; - msg.msg_iovlen=1; - - return sock_sendmsg(sock, &msg, count); -} - -/* - * Read a message from the kernel side of the communication link - */ - -static ssize_t netlink_read(struct file * file, char __user * buf, - size_t count, loff_t *pos) -{ - struct inode *inode = file->f_dentry->d_inode; - struct socket *sock = netlink_user[iminor(inode)]; - struct msghdr msg; - struct iovec iov; - - iov.iov_base = buf; - iov.iov_len = count; - msg.msg_name=NULL; - msg.msg_namelen=0; - msg.msg_controllen=0; - msg.msg_flags=0; - msg.msg_iov=&iov; - msg.msg_iovlen=1; - if (file->f_flags&O_NONBLOCK) - msg.msg_flags=MSG_DONTWAIT; - - return sock_recvmsg(sock, &msg, count, msg.msg_flags); -} - -static int netlink_open(struct inode * inode, struct file * file) -{ - unsigned int minor = iminor(inode); - struct socket *sock; - struct sockaddr_nl nladdr; - int err; - - if (minor>=MAX_LINKS) - return -ENODEV; - if (test_and_set_bit(minor, &open_map)) - return -EBUSY; - - err = sock_create_kern(PF_NETLINK, SOCK_RAW, minor, &sock); - if (err < 0) - goto out; - - memset(&nladdr, 0, sizeof(nladdr)); - nladdr.nl_family = AF_NETLINK; - nladdr.nl_groups = ~0; - if ((err = sock->ops->bind(sock, (struct sockaddr*)&nladdr, sizeof(nladdr))) < 0) { - sock_release(sock); - goto out; - } - - netlink_user[minor] = sock; - return 0; - -out: - clear_bit(minor, &open_map); - return err; -} - -static int netlink_release(struct inode * inode, struct file * file) -{ - unsigned int minor = iminor(inode); - struct socket *sock; - - sock = netlink_user[minor]; - netlink_user[minor] = NULL; - clear_bit(minor, &open_map); - sock_release(sock); - return 0; -} - - -static int netlink_ioctl(struct inode *inode, struct file *file, - unsigned int cmd, unsigned long arg) -{ - unsigned int minor = iminor(inode); - int retval = 0; - - if (minor >= MAX_LINKS) - return -ENODEV; - switch ( cmd ) { - default: - retval = -EINVAL; - } - return retval; -} - - -static struct file_operations netlink_fops = { - .owner = THIS_MODULE, - .llseek = no_llseek, - .read = netlink_read, - .write = netlink_write, - .poll = netlink_poll, - .ioctl = netlink_ioctl, - .open = netlink_open, - .release = netlink_release, -}; - -static struct { - char *name; - int minor; -} entries[] = { - { - .name = "route", - .minor = NETLINK_ROUTE, - }, - { - .name = "skip", - .minor = NETLINK_SKIP, - }, - { - .name = "usersock", - .minor = NETLINK_USERSOCK, - }, - { - .name = "fwmonitor", - .minor = NETLINK_FIREWALL, - }, - { - .name = "tcpdiag", - .minor = NETLINK_TCPDIAG, - }, - { - .name = "nflog", - .minor = NETLINK_NFLOG, - }, - { - .name = "xfrm", - .minor = NETLINK_XFRM, - }, - { - .name = "arpd", - .minor = NETLINK_ARPD, - }, - { - .name = "route6", - .minor = NETLINK_ROUTE6, - }, - { - .name = "ip6_fw", - .minor = NETLINK_IP6_FW, - }, - { - .name = "dnrtmsg", - .minor = NETLINK_DNRTMSG, - }, -}; - -static int __init init_netlink(void) -{ - int i; - - if (register_chrdev(NETLINK_MAJOR,"netlink", &netlink_fops)) { - printk(KERN_ERR "netlink: unable to get major %d\n", NETLINK_MAJOR); - return -EIO; - } - - netlink_class = class_simple_create(THIS_MODULE, "netlink"); - if (IS_ERR(netlink_class)) { - printk (KERN_ERR "Error creating netlink class.\n"); - unregister_chrdev(NETLINK_MAJOR, "netlink"); - return PTR_ERR(netlink_class); - } - - devfs_mk_dir("netlink"); - - /* Someone tell me the official names for the uppercase ones */ - for (i = 0; i < ARRAY_SIZE(entries); i++) { - devfs_mk_cdev(MKDEV(NETLINK_MAJOR, entries[i].minor), - S_IFCHR|S_IRUSR|S_IWUSR, "netlink/%s", entries[i].name); - class_simple_device_add(netlink_class, MKDEV(NETLINK_MAJOR, entries[i].minor), NULL, "%s", entries[i].name); - } - - for (i = 0; i < 16; i++) { - devfs_mk_cdev(MKDEV(NETLINK_MAJOR, i + 16), - S_IFCHR|S_IRUSR|S_IWUSR, "netlink/tap%d", i); - class_simple_device_add(netlink_class, MKDEV(NETLINK_MAJOR, i + 16), NULL, "tap%d", i); - } - - return 0; -} - -static void __exit cleanup_netlink(void) -{ - int i; - - for (i = 0; i < ARRAY_SIZE(entries); i++) { - devfs_remove("netlink/%s", entries[i].name); - class_simple_device_remove(MKDEV(NETLINK_MAJOR, entries[i].minor)); - } - for (i = 0; i < 16; i++) { - devfs_remove("netlink/tap%d", i); - class_simple_device_remove(MKDEV(NETLINK_MAJOR, i + 16)); - } - devfs_remove("netlink"); - class_simple_destroy(netlink_class); - unregister_chrdev(NETLINK_MAJOR, "netlink"); -} - -MODULE_LICENSE("GPL"); -module_init(init_netlink); -module_exit(cleanup_netlink); |
