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413a4317ac
This patch adds the sock_diag interface for querying sockets from userspace. Tools like ss(8) and netstat(8) can use this interface to list open sockets. The userspace ABI is defined in <linux/vm_sockets_diag.h> and includes netlink request and response structs. The request can query sockets based on their sk_state (e.g. listening sockets only) and the response contains socket information fields including the local/remote addresses, inode number, etc. This patch does not dump VMCI pending sockets because I have only tested the virtio transport, which does not use pending sockets. Support can be added later by extending vsock_diag_dump() if needed by VMCI users. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
34 lines
915 B
C
34 lines
915 B
C
/* AF_VSOCK sock_diag(7) interface for querying open sockets */
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#ifndef _UAPI__VM_SOCKETS_DIAG_H__
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#define _UAPI__VM_SOCKETS_DIAG_H__
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#include <linux/types.h>
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/* Request */
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struct vsock_diag_req {
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__u8 sdiag_family; /* must be AF_VSOCK */
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__u8 sdiag_protocol; /* must be 0 */
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__u16 pad; /* must be 0 */
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__u32 vdiag_states; /* query bitmap (e.g. 1 << TCP_LISTEN) */
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__u32 vdiag_ino; /* must be 0 (reserved) */
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__u32 vdiag_show; /* must be 0 (reserved) */
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__u32 vdiag_cookie[2];
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};
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/* Response */
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struct vsock_diag_msg {
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__u8 vdiag_family; /* AF_VSOCK */
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__u8 vdiag_type; /* SOCK_STREAM or SOCK_DGRAM */
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__u8 vdiag_state; /* sk_state (e.g. TCP_LISTEN) */
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__u8 vdiag_shutdown; /* local RCV_SHUTDOWN | SEND_SHUTDOWN */
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__u32 vdiag_src_cid;
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__u32 vdiag_src_port;
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__u32 vdiag_dst_cid;
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__u32 vdiag_dst_port;
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__u32 vdiag_ino;
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__u32 vdiag_cookie[2];
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};
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#endif /* _UAPI__VM_SOCKETS_DIAG_H__ */
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