13405468f4
Passing O_CREAT (00000100) to open means we should also pass file
mode as the third parameter. Creating /dev/console as a regular
file may not be helpful anyway, so simply drop the flag when
opening debug_fd.
Fixes: d2ba09c17a ("net: add skeleton of bpfilter kernel module")
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
63 lines
1.1 KiB
C
63 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#define _GNU_SOURCE
|
|
#include <sys/uio.h>
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <sys/socket.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
#include "include/uapi/linux/bpf.h"
|
|
#include <asm/unistd.h>
|
|
#include "msgfmt.h"
|
|
|
|
int debug_fd;
|
|
|
|
static int handle_get_cmd(struct mbox_request *cmd)
|
|
{
|
|
switch (cmd->cmd) {
|
|
case 0:
|
|
return 0;
|
|
default:
|
|
break;
|
|
}
|
|
return -ENOPROTOOPT;
|
|
}
|
|
|
|
static int handle_set_cmd(struct mbox_request *cmd)
|
|
{
|
|
return -ENOPROTOOPT;
|
|
}
|
|
|
|
static void loop(void)
|
|
{
|
|
while (1) {
|
|
struct mbox_request req;
|
|
struct mbox_reply reply;
|
|
int n;
|
|
|
|
n = read(0, &req, sizeof(req));
|
|
if (n != sizeof(req)) {
|
|
dprintf(debug_fd, "invalid request %d\n", n);
|
|
return;
|
|
}
|
|
|
|
reply.status = req.is_set ?
|
|
handle_set_cmd(&req) :
|
|
handle_get_cmd(&req);
|
|
|
|
n = write(1, &reply, sizeof(reply));
|
|
if (n != sizeof(reply)) {
|
|
dprintf(debug_fd, "reply failed %d\n", n);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
int main(void)
|
|
{
|
|
debug_fd = open("/dev/console", 00000002);
|
|
dprintf(debug_fd, "Started bpfilter\n");
|
|
loop();
|
|
close(debug_fd);
|
|
return 0;
|
|
}
|