redonkable/alistair23-linux
redonkable/alistair23-linux
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Merge branch 'vhost' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

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This commit is contained in:
David S. Miller 2010-05-06 00:26:49 -07:00
parent 2873957df0 55afbd0810
commit 58544feb67
3 changed files with 53 additions and 8 deletions
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27
drivers/net/macvtap.c
View file

@ -38,6 +38,7 @@ struct macvtap_queue {
struct sock sk;
struct socket sock;
struct socket_wq wq;
int vnet_hdr_sz;
struct macvlan_dev *vlan;
struct file *file;
unsigned int flags;
@ -285,6 +286,7 @@ static int macvtap_open(struct inode *inode, struct file *file)
sock_init_data(&q->sock, &q->sk);
q->sk.sk_write_space = macvtap_sock_write_space;
q->flags = IFF_VNET_HDR | IFF_NO_PI | IFF_TAP;
q->vnet_hdr_sz = sizeof(struct virtio_net_hdr);
err = macvtap_set_queue(dev, file, q);
if (err)
@ -445,14 +447,14 @@ static ssize_t macvtap_get_user(struct macvtap_queue *q,
int vnet_hdr_len = 0;
if (q->flags & IFF_VNET_HDR) {
vnet_hdr_len = sizeof(vnet_hdr);
vnet_hdr_len = q->vnet_hdr_sz;
err = -EINVAL;
if ((len -= vnet_hdr_len) < 0)
goto err;
err = memcpy_fromiovecend((void *)&vnet_hdr, iv, 0,
vnet_hdr_len);
sizeof(vnet_hdr));
if (err < 0)
goto err;
if ((vnet_hdr.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) &&
@ -534,7 +536,7 @@ static ssize_t macvtap_put_user(struct macvtap_queue *q,
if (q->flags & IFF_VNET_HDR) {
struct virtio_net_hdr vnet_hdr;
vnet_hdr_len = sizeof (vnet_hdr);
vnet_hdr_len = q->vnet_hdr_sz;
if ((len -= vnet_hdr_len) < 0)
return -EINVAL;
@ -542,7 +544,7 @@ static ssize_t macvtap_put_user(struct macvtap_queue *q,
if (ret)
return ret;
if (memcpy_toiovecend(iv, (void *)&vnet_hdr, 0, vnet_hdr_len))
if (memcpy_toiovecend(iv, (void *)&vnet_hdr, 0, sizeof(vnet_hdr)))
return -EFAULT;
}
@ -627,6 +629,8 @@ static long macvtap_ioctl(struct file *file, unsigned int cmd,
struct ifreq __user *ifr = argp;
unsigned int __user *up = argp;
unsigned int u;
int __user *sp = argp;
int s;
int ret;
switch (cmd) {
@ -672,6 +676,21 @@ static long macvtap_ioctl(struct file *file, unsigned int cmd,
q->sk.sk_sndbuf = u;
return 0;
case TUNGETVNETHDRSZ:
s = q->vnet_hdr_sz;
if (put_user(s, sp))
return -EFAULT;
return 0;
case TUNSETVNETHDRSZ:
if (get_user(s, sp))
return -EFAULT;
if (s < (int)sizeof(struct virtio_net_hdr))
return -EINVAL;
q->vnet_hdr_sz = s;
return 0;
case TUNSETOFFLOAD:
/* let the user check for future flags */
if (arg & ~(TUN_F_CSUM | TUN_F_TSO4 | TUN_F_TSO6 |

32
drivers/net/tun.c
View file

@ -110,6 +110,9 @@ struct tun_struct {
struct tap_filter txflt;
struct socket socket;
struct socket_wq wq;
int vnet_hdr_sz;
#ifdef TUN_DEBUG
int debug;
#endif
@ -563,7 +566,7 @@ static __inline__ ssize_t tun_get_user(struct tun_struct *tun,
}
if (tun->flags & TUN_VNET_HDR) {
if ((len -= sizeof(gso)) > count)
if ((len -= tun->vnet_hdr_sz) > count)
return -EINVAL;
if (memcpy_fromiovecend((void *)&gso, iv, offset, sizeof(gso)))
@ -575,7 +578,7 @@ static __inline__ ssize_t tun_get_user(struct tun_struct *tun,
if (gso.hdr_len > len)
return -EINVAL;
offset += sizeof(gso);
offset += tun->vnet_hdr_sz;
}
if ((tun->flags & TUN_TYPE_MASK) == TUN_TAP_DEV) {
@ -718,7 +721,7 @@ static __inline__ ssize_t tun_put_user(struct tun_struct *tun,
if (tun->flags & TUN_VNET_HDR) {
struct virtio_net_hdr gso = { 0 }; /* no info leak */
if ((len -= sizeof(gso)) < 0)
if ((len -= tun->vnet_hdr_sz) < 0)
return -EINVAL;
if (skb_is_gso(skb)) {
@ -749,7 +752,7 @@ static __inline__ ssize_t tun_put_user(struct tun_struct *tun,
if (unlikely(memcpy_toiovecend(iv, (void *)&gso, total,
sizeof(gso))))
return -EFAULT;
total += sizeof(gso);
total += tun->vnet_hdr_sz;
}
len = min_t(int, skb->len, len);
@ -1035,6 +1038,7 @@ static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr)
tun->dev = dev;
tun->flags = flags;
tun->txflt.count = 0;
tun->vnet_hdr_sz = sizeof(struct virtio_net_hdr);
err = -ENOMEM;
sk = sk_alloc(net, AF_UNSPEC, GFP_KERNEL, &tun_proto);
@ -1177,6 +1181,7 @@ static long __tun_chr_ioctl(struct file *file, unsigned int cmd,
struct sock_fprog fprog;
struct ifreq ifr;
int sndbuf;
int vnet_hdr_sz;
int ret;
if (cmd == TUNSETIFF || _IOC_TYPE(cmd) == 0x89)
@ -1322,6 +1327,25 @@ static long __tun_chr_ioctl(struct file *file, unsigned int cmd,
tun->socket.sk->sk_sndbuf = sndbuf;
break;
case TUNGETVNETHDRSZ:
vnet_hdr_sz = tun->vnet_hdr_sz;
if (copy_to_user(argp, &vnet_hdr_sz, sizeof(vnet_hdr_sz)))
ret = -EFAULT;
break;
case TUNSETVNETHDRSZ:
if (copy_from_user(&vnet_hdr_sz, argp, sizeof(vnet_hdr_sz))) {
ret = -EFAULT;
break;
}
if (vnet_hdr_sz < (int)sizeof(struct virtio_net_hdr)) {
ret = -EINVAL;
break;
}
tun->vnet_hdr_sz = vnet_hdr_sz;
break;
case TUNATTACHFILTER:
/* Can be set only for TAPs */
ret = -EINVAL;

2
include/linux/if_tun.h
View file

@ -51,6 +51,8 @@
#define TUNSETSNDBUF _IOW('T', 212, int)
#define TUNATTACHFILTER _IOW('T', 213, struct sock_fprog)
#define TUNDETACHFILTER _IOW('T', 214, struct sock_fprog)
#define TUNGETVNETHDRSZ _IOR('T', 215, int)
#define TUNSETVNETHDRSZ _IOW('T', 216, int)
/* TUNSETIFF ifr flags */
#define IFF_TUN 0x0001