ia64/linux-2.6.18-xen.hg

view fs/proc/kmsg.c @ 524:7f8b544237bf

netfront: Allow netfront in domain 0.

This is useful if your physical network device is in a utility domain.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
author Keir Fraser <keir.fraser@citrix.com>
date Tue Apr 15 15:18:58 2008 +0100 (2008-04-15)
parents 831230e53067
children
line source
1 /*
2 * linux/fs/proc/kmsg.c
3 *
4 * Copyright (C) 1992 by Linus Torvalds
5 *
6 */
8 #include <linux/types.h>
9 #include <linux/errno.h>
10 #include <linux/time.h>
11 #include <linux/kernel.h>
12 #include <linux/poll.h>
13 #include <linux/fs.h>
15 #include <asm/uaccess.h>
16 #include <asm/io.h>
18 extern wait_queue_head_t log_wait;
20 extern int do_syslog(int type, char __user *bug, int count);
22 static int kmsg_open(struct inode * inode, struct file * file)
23 {
24 return do_syslog(1,NULL,0);
25 }
27 static int kmsg_release(struct inode * inode, struct file * file)
28 {
29 (void) do_syslog(0,NULL,0);
30 return 0;
31 }
33 static ssize_t kmsg_read(struct file *file, char __user *buf,
34 size_t count, loff_t *ppos)
35 {
36 if ((file->f_flags & O_NONBLOCK) && !do_syslog(9, NULL, 0))
37 return -EAGAIN;
38 return do_syslog(2, buf, count);
39 }
41 static unsigned int kmsg_poll(struct file *file, poll_table *wait)
42 {
43 poll_wait(file, &log_wait, wait);
44 if (do_syslog(9, NULL, 0))
45 return POLLIN | POLLRDNORM;
46 return 0;
47 }
50 const struct file_operations proc_kmsg_operations = {
51 .read = kmsg_read,
52 .poll = kmsg_poll,
53 .open = kmsg_open,
54 .release = kmsg_release,
55 };