From 0b2e66448ba20eb30ea62345d6beb9ee2a1ce06b Mon Sep 17 00:00:00 2001 From: Gerard Garcia Date: Fri, 21 Apr 2017 10:10:45 +0100 Subject: 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 Signed-off-by: Stefan Hajnoczi Signed-off-by: David S. Miller --- include/uapi/linux/Kbuild | 1 + include/uapi/linux/vsockmon.h | 60 +++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 61 insertions(+) create mode 100644 include/uapi/linux/vsockmon.h (limited to 'include/uapi') diff --git a/include/uapi/linux/Kbuild b/include/uapi/linux/Kbuild index f8d9fed17ba9..6b0e2758585f 100644 --- a/include/uapi/linux/Kbuild +++ b/include/uapi/linux/Kbuild @@ -477,6 +477,7 @@ header-y += virtio_types.h header-y += virtio_vsock.h header-y += virtio_crypto.h header-y += vm_sockets.h +header-y += vsockmon.h header-y += vt.h header-y += vtpm_proxy.h header-y += wait.h 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 + +/* + * 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 -- cgit v1.2.3