diff options
| -rw-r--r-- | drivers/net/tun.c | 8 | ||||
| -rw-r--r-- | include/linux/if_tun.h | 1 |
2 files changed, 9 insertions, 0 deletions
diff --git a/drivers/net/tun.c b/drivers/net/tun.c index 7ab94c825b5..3bb991fd2b5 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -640,6 +640,14 @@ static int tun_chr_ioctl(struct inode *inode, struct file *file, return 0; } + if (cmd == TUNGETFEATURES) { + /* Currently this just means: "what IFF flags are valid?". + * This is needed because we never checked for invalid flags on + * TUNSETIFF. */ + return put_user(IFF_TUN | IFF_TAP | IFF_NO_PI | IFF_ONE_QUEUE, + (unsigned int __user*)argp); + } + if (!tun) return -EBADFD; diff --git a/include/linux/if_tun.h b/include/linux/if_tun.h index 18f31b6187a..94f76a11230 100644 --- a/include/linux/if_tun.h +++ b/include/linux/if_tun.h @@ -40,6 +40,7 @@ #define TUNSETOWNER _IOW('T', 204, int) #define TUNSETLINK _IOW('T', 205, int) #define TUNSETGROUP _IOW('T', 206, int) +#define TUNGETFEATURES _IOR('T', 207, unsigned int) /* TUNSETIFF ifr flags */ #define IFF_TUN 0x0001 |