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Commit 5820299a authored by David S. Miller's avatar David S. Miller
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Merge branch 'VSOCK-sock_diag' 



Stefan Hajnoczi says:

====================
VSOCK: add sock_diag interface

v3:
 * Rebased onto net-next/master and resolved Hyper-V transport conflict

v2:
 * Moved tests to tools/testing/vsock/.  I was unable to put them in selftests/
   because they require manual setup of a VMware/KVM guest.
 * Moved to __vsock_in_bound/connected_table() to af_vsock.h
 * Fixed local variable ordering in Patch 4

There is currently no way for userspace to query open AF_VSOCK sockets.  This
means ss(8), netstat(8), and other utilities cannot display AF_VSOCK sockets.

This patch series adds the netlink sock_diag interface for AF_VSOCK.  Userspace
programs sent a DUMP request including an sk_state bitmap to filter sockets
based on their state (connected, listening, etc).  The vsock_diag.ko module
replies with information about matching sockets.  This userspace ABI is defined
in <linux/vm_sockets_diag.h>.

The final patch adds a test suite that exercises the basic cases.

Jorgen and Dexuan: I have only tested the virtio transport but this should also
work for VMCI and Hyper-V.  Please give it a shot if you have time.
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents 53954cf8 0b025033

MAINTAINERS

+3 −0
Original line number Diff line number Diff line
@@ -14286,12 +14286,15 @@ S: Maintained 
F:	include/linux/virtio_vsock.h

F:	include/uapi/linux/virtio_vsock.h

F:	include/uapi/linux/vsockmon.h

F:	include/uapi/linux/vm_sockets_diag.h

F:	net/vmw_vsock/diag.c

F:	net/vmw_vsock/af_vsock_tap.c

F:	net/vmw_vsock/virtio_transport_common.c

F:	net/vmw_vsock/virtio_transport.c

F:	drivers/net/vsockmon.c

F:	drivers/vhost/vsock.c

F:	drivers/vhost/vsock.h

F:	tools/testing/vsock/



VIRTIO CONSOLE DRIVER

M:	Amit Shah <amit@kernel.org>

include/net/af_vsock.h

+17 −3
Original line number Diff line number Diff line
@@ -22,11 +22,13 @@ 


#include "vsock_addr.h"



/* vsock-specific sock->sk_state constants */

#define VSOCK_SS_LISTEN 255



#define LAST_RESERVED_PORT 1023



#define VSOCK_HASH_SIZE         251

extern struct list_head vsock_bind_table[VSOCK_HASH_SIZE + 1];

extern struct list_head vsock_connected_table[VSOCK_HASH_SIZE];

extern spinlock_t vsock_table_lock;



#define vsock_sk(__sk)    ((struct vsock_sock *)__sk)

#define sk_vsock(__vsk)   (&(__vsk)->sk)
@@ -175,6 +177,18 @@ const struct vsock_transport *vsock_core_get_transport(void); 


/**** UTILS ****/



/* vsock_table_lock must be held */

static inline bool __vsock_in_bound_table(struct vsock_sock *vsk)

{

	return !list_empty(&vsk->bound_table);

}



/* vsock_table_lock must be held */

static inline bool __vsock_in_connected_table(struct vsock_sock *vsk)

{

	return !list_empty(&vsk->connected_table);

}



void vsock_release_pending(struct sock *pending);

void vsock_add_pending(struct sock *listener, struct sock *pending);

void vsock_remove_pending(struct sock *listener, struct sock *pending);

include/uapi/linux/vm_sockets_diag.h

0 → 100644
+33 −0
Original line number Diff line number Diff line 
/* AF_VSOCK sock_diag(7) interface for querying open sockets */



#ifndef _UAPI__VM_SOCKETS_DIAG_H__

#define _UAPI__VM_SOCKETS_DIAG_H__



#include <linux/types.h>



/* Request */

struct vsock_diag_req {

	__u8	sdiag_family;	/* must be AF_VSOCK */

	__u8	sdiag_protocol;	/* must be 0 */

	__u16	pad;		/* must be 0 */

	__u32	vdiag_states;	/* query bitmap (e.g. 1 << TCP_LISTEN) */

	__u32	vdiag_ino;	/* must be 0 (reserved) */

	__u32	vdiag_show;	/* must be 0 (reserved) */

	__u32	vdiag_cookie[2];

};



/* Response */

struct vsock_diag_msg {

	__u8	vdiag_family;	/* AF_VSOCK */

	__u8	vdiag_type;	/* SOCK_STREAM or SOCK_DGRAM */

	__u8	vdiag_state;	/* sk_state (e.g. TCP_LISTEN) */

	__u8	vdiag_shutdown; /* local RCV_SHUTDOWN | SEND_SHUTDOWN */

	__u32   vdiag_src_cid;

	__u32   vdiag_src_port;

	__u32   vdiag_dst_cid;

	__u32   vdiag_dst_port;

	__u32	vdiag_ino;

	__u32	vdiag_cookie[2];

};



#endif /* _UAPI__VM_SOCKETS_DIAG_H__ */

net/vmw_vsock/Kconfig

+10 −0
Original line number Diff line number Diff line
@@ -15,6 +15,16 @@ config VSOCKETS 
	  To compile this driver as a module, choose M here: the module

	  will be called vsock. If unsure, say N.



config VSOCKETS_DIAG

	tristate "Virtual Sockets monitoring interface"

	depends on VSOCKETS

	default y

	help

	  Support for PF_VSOCK sockets monitoring interface used by the ss tool.

	  If unsure, say Y.



	  Enable this module so userspace applications can query open sockets.



config VMWARE_VMCI_VSOCKETS

	tristate "VMware VMCI transport for Virtual Sockets"

	depends on VSOCKETS && VMWARE_VMCI

net/vmw_vsock/Makefile

+3 −0
Original line number Diff line number Diff line 
obj-$(CONFIG_VSOCKETS) += vsock.o

obj-$(CONFIG_VSOCKETS_DIAG) += vsock_diag.o

obj-$(CONFIG_VMWARE_VMCI_VSOCKETS) += vmw_vsock_vmci_transport.o

obj-$(CONFIG_VIRTIO_VSOCKETS) += vmw_vsock_virtio_transport.o

obj-$(CONFIG_VIRTIO_VSOCKETS_COMMON) += vmw_vsock_virtio_transport_common.o
@@ -6,6 +7,8 @@ obj-$(CONFIG_HYPERV_VSOCKETS) += hv_sock.o 


vsock-y += af_vsock.o af_vsock_tap.o vsock_addr.o



vsock_diag-y += diag.o



vmw_vsock_vmci_transport-y += vmci_transport.o vmci_transport_notify.o \

	vmci_transport_notify_qstate.o