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author | Gerard Garcia <ggarcia@deic.uab.cat> | 2017-04-21 10:10:45 +0100 |
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committer | David S. Miller <davem@davemloft.net> | 2017-04-24 12:35:56 -0400 |
commit | 0b2e66448ba20eb30ea62345d6beb9ee2a1ce06b (patch) | |
tree | 044d66fc95f06c1239208e1d2b4ec7559b693ab0 /include/uapi/linux/vsockmon.h | |
parent | 531b374834c891ae2abf800693074df35a7d1a36 (diff) | |
download | linux-stable-0b2e66448ba20eb30ea62345d6beb9ee2a1ce06b.tar.gz linux-stable-0b2e66448ba20eb30ea62345d6beb9ee2a1ce06b.tar.bz2 linux-stable-0b2e66448ba20eb30ea62345d6beb9ee2a1ce06b.zip |
VSOCK: Add vsockmon device
Add vsockmon virtual network device that receives packets from the vsock
transports and exposes them to user space.
Based on the nlmon device.
Signed-off-by: Gerard Garcia <ggarcia@deic.uab.cat>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/uapi/linux/vsockmon.h')
-rw-r--r-- | include/uapi/linux/vsockmon.h | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/include/uapi/linux/vsockmon.h b/include/uapi/linux/vsockmon.h new file mode 100644 index 000000000000..a08b522ef597 --- /dev/null +++ b/include/uapi/linux/vsockmon.h @@ -0,0 +1,60 @@ +#ifndef _UAPI_VSOCKMON_H +#define _UAPI_VSOCKMON_H + +#include <linux/virtio_vsock.h> + +/* + * vsockmon is the AF_VSOCK packet capture device. Packets captured have the + * following layout: + * + * +-----------------------------------+ + * | vsockmon header | + * | (struct af_vsockmon_hdr) | + * +-----------------------------------+ + * | transport header | + * | (af_vsockmon_hdr->len bytes long) | + * +-----------------------------------+ + * | payload | + * | (until end of packet) | + * +-----------------------------------+ + * + * The vsockmon header is a transport-independent description of the packet. + * It duplicates some of the information from the transport header so that + * no transport-specific knowledge is necessary to process packets. + * + * The transport header is useful for low-level transport-specific packet + * analysis. Transport type is given in af_vsockmon_hdr->transport and + * transport header length is given in af_vsockmon_hdr->len. + * + * If af_vsockmon_hdr->op is AF_VSOCK_OP_PAYLOAD then the payload follows the + * transport header. Other ops do not have a payload. + */ + +struct af_vsockmon_hdr { + __le64 src_cid; + __le64 dst_cid; + __le32 src_port; + __le32 dst_port; + __le16 op; /* enum af_vsockmon_op */ + __le16 transport; /* enum af_vsockmon_transport */ + __le16 len; /* Transport header length */ + __u8 reserved[2]; +}; + +enum af_vsockmon_op { + AF_VSOCK_OP_UNKNOWN = 0, + AF_VSOCK_OP_CONNECT = 1, + AF_VSOCK_OP_DISCONNECT = 2, + AF_VSOCK_OP_CONTROL = 3, + AF_VSOCK_OP_PAYLOAD = 4, +}; + +enum af_vsockmon_transport { + AF_VSOCK_TRANSPORT_UNKNOWN = 0, + AF_VSOCK_TRANSPORT_NO_INFO = 1, /* No transport information */ + + /* Transport header type: struct virtio_vsock_hdr */ + AF_VSOCK_TRANSPORT_VIRTIO = 2, +}; + +#endif |