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tipc: implement socket diagnostics for AF_TIPC

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This commit adds socket diagnostics capability for AF_TIPC in netlink
family NETLINK_SOCK_DIAG in a new kernel module (diag.ko).

The following are key design considerations:
- config TIPC_DIAG has default y, like INET_DIAG.
- only requests with flag NLM_F_DUMP is supported (dump all).
- tipc_sock_diag_req message is introduced to send filter parameters.
- the response attributes are of TLV, some nested.

To avoid exposing data structures between diag and tipc modules and
avoid code duplication, the following additions are required:
- export tipc_nl_sk_walk function to reuse socket iterator.
- export tipc_sk_fill_sock_diag to fill the tipc diag attributes.
- create a sock_diag response message in __tipc_add_sock_diag defined
  in diag.c and use the above exported tipc_sk_fill_sock_diag
  to fill response.

Acked-by: Jon Maloy <jon.maloy@ericsson.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: GhantaKrishnamurthy MohanKrishna <mohan.krishna.ghanta.krishnamurthy@ericsson.com>
Signed-off-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
GhantaKrishnamurthy MohanKrishna 2018-03-21 14:37:44 +01:00 • committed by David S. Miller
commit c30b70deb5
7 changed files with 238 additions and 6 deletions
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18
include/uapi/linux/tipc_netlink.h
View file

@ -114,6 +114,13 @@ enum {
TIPC_NLA_SOCK_REF, /* u32 */
TIPC_NLA_SOCK_CON, /* nest */
TIPC_NLA_SOCK_HAS_PUBL, /* flag */
TIPC_NLA_SOCK_STAT, /* nest */
TIPC_NLA_SOCK_TYPE, /* u32 */
TIPC_NLA_SOCK_INO, /* u32 */
TIPC_NLA_SOCK_UID, /* u32 */
TIPC_NLA_SOCK_TIPC_STATE, /* u32 */
TIPC_NLA_SOCK_COOKIE, /* u64 */
TIPC_NLA_SOCK_PAD, /* flag */
__TIPC_NLA_SOCK_MAX,
TIPC_NLA_SOCK_MAX = __TIPC_NLA_SOCK_MAX - 1
@ -238,6 +245,17 @@ enum {
TIPC_NLA_CON_MAX = __TIPC_NLA_CON_MAX - 1
};
/* Nest, socket statistics info */
enum {
TIPC_NLA_SOCK_STAT_RCVQ, /* u32 */
TIPC_NLA_SOCK_STAT_SENDQ, /* u32 */
TIPC_NLA_SOCK_STAT_LINK_CONG, /* flag */
TIPC_NLA_SOCK_STAT_CONN_CONG, /* flag */
__TIPC_NLA_SOCK_STAT_MAX,
TIPC_NLA_SOCK_STAT_MAX = __TIPC_NLA_SOCK_STAT_MAX - 1
};
/* Nest, link propreties. Valid for link, media and bearer */
enum {
TIPC_NLA_PROP_UNSPEC,

17
include/uapi/linux/tipc_sockets_diag.h Normal file
View file

@ -0,0 +1,17 @@
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/* AF_TIPC sock_diag interface for querying open sockets */
#ifndef _UAPI__TIPC_SOCKETS_DIAG_H__
#define _UAPI__TIPC_SOCKETS_DIAG_H__
#include <linux/types.h>
#include <linux/sock_diag.h>
/* Request */
struct tipc_sock_diag_req {
__u8 sdiag_family; /* must be AF_TIPC */
__u8 sdiag_protocol; /* must be 0 */
__u16 pad; /* must be 0 */
__u32 tidiag_states; /* query*/
};
#endif /* _UAPI__TIPC_SOCKETS_DIAG_H__ */