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| author | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2012-05-21 21:39:42 +0200 |
|---|---|---|
| committer | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2012-05-21 21:39:42 +0200 |
| commit | 0ad8c6a22d03a1598f7cc6585c65354dadca62ad (patch) | |
| tree | 1507deef3d55d5f3c71b2f76924fe1f6c6211905 /drivers/net/macvtap.c | |
| parent | 8527f8e2934683e53405fbe876a4e6f4a0c46eb8 (diff) | |
| parent | 76e10d158efb6d4516018846f60c2ab5501900bc (diff) | |
Merge tag 'v3.4' with SCSI updates, needed for subsequent firewire-sbp2 changes
Linux 3.4
Diffstat (limited to 'drivers/net/macvtap.c')
| -rw-r--r-- | drivers/net/macvtap.c | 43 |
1 files changed, 38 insertions, 5 deletions
diff --git a/drivers/net/macvtap.c b/drivers/net/macvtap.c index 0427c6561c8..cb8fd5069db 100644 --- a/drivers/net/macvtap.c +++ b/drivers/net/macvtap.c @@ -1,5 +1,6 @@ #include <linux/etherdevice.h> #include <linux/if_macvlan.h> +#include <linux/if_vlan.h> #include <linux/interrupt.h> #include <linux/nsproxy.h> #include <linux/compat.h> @@ -759,6 +760,8 @@ static ssize_t macvtap_put_user(struct macvtap_queue *q, struct macvlan_dev *vlan; int ret; int vnet_hdr_len = 0; + int vlan_offset = 0; + int copied; if (q->flags & IFF_VNET_HDR) { struct virtio_net_hdr vnet_hdr; @@ -773,18 +776,48 @@ static ssize_t macvtap_put_user(struct macvtap_queue *q, if (memcpy_toiovecend(iv, (void *)&vnet_hdr, 0, sizeof(vnet_hdr))) return -EFAULT; } + copied = vnet_hdr_len; + + if (!vlan_tx_tag_present(skb)) + len = min_t(int, skb->len, len); + else { + int copy; + struct { + __be16 h_vlan_proto; + __be16 h_vlan_TCI; + } veth; + veth.h_vlan_proto = htons(ETH_P_8021Q); + veth.h_vlan_TCI = htons(vlan_tx_tag_get(skb)); + + vlan_offset = offsetof(struct vlan_ethhdr, h_vlan_proto); + len = min_t(int, skb->len + VLAN_HLEN, len); + + copy = min_t(int, vlan_offset, len); + ret = skb_copy_datagram_const_iovec(skb, 0, iv, copied, copy); + len -= copy; + copied += copy; + if (ret || !len) + goto done; + + copy = min_t(int, sizeof(veth), len); + ret = memcpy_toiovecend(iv, (void *)&veth, copied, copy); + len -= copy; + copied += copy; + if (ret || !len) + goto done; + } - len = min_t(int, skb->len, len); - - ret = skb_copy_datagram_const_iovec(skb, 0, iv, vnet_hdr_len, len); + ret = skb_copy_datagram_const_iovec(skb, vlan_offset, iv, copied, len); + copied += len; +done: rcu_read_lock_bh(); vlan = rcu_dereference_bh(q->vlan); if (vlan) - macvlan_count_rx(vlan, len, ret == 0, 0); + macvlan_count_rx(vlan, copied - vnet_hdr_len, ret == 0, 0); rcu_read_unlock_bh(); - return ret ? ret : (len + vnet_hdr_len); + return ret ? ret : copied; } static ssize_t macvtap_do_read(struct macvtap_queue *q, struct kiocb *iocb, |