Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit f16a7dd5 authored by Ursula Braun's avatar Ursula Braun Committed by David S. Miller
Browse files

smc: netlink interface for SMC sockets 



Support for SMC socket monitoring via netlink sockets of protocol
NETLINK_SOCK_DIAG.

Signed-off-by: default avatarUrsula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent b38d7324

include/net/smc.h

0 → 100644
+20 −0
Original line number Diff line number Diff line 
/*

 *  Shared Memory Communications over RDMA (SMC-R) and RoCE

 *

 *  Definitions for the SMC module (socket related)

 *

 *  Copyright IBM Corp. 2016

 *

 *  Author(s):  Ursula Braun <ubraun@linux.vnet.ibm.com>

 */

#ifndef _SMC_H

#define _SMC_H



struct smc_hashinfo {

	rwlock_t lock;

	struct hlist_head ht;

};



int smc_hash_sk(struct sock *sk);

void smc_unhash_sk(struct sock *sk);

#endif	/* _SMC_H */

include/net/sock.h

+3 −0
Original line number Diff line number Diff line
@@ -70,6 +70,7 @@ 
#include <net/checksum.h>

#include <net/tcp_states.h>

#include <linux/net_tstamp.h>

#include <net/smc.h>



/*

 * This structure really needs to be cleaned up.
@@ -986,6 +987,7 @@ struct request_sock_ops; 
struct timewait_sock_ops;

struct inet_hashinfo;

struct raw_hashinfo;

struct smc_hashinfo;

struct module;



/*
@@ -1094,6 +1096,7 @@ struct proto { 
		struct inet_hashinfo	*hashinfo;

		struct udp_table	*udp_table;

		struct raw_hashinfo	*raw_hash;

		struct smc_hashinfo	*smc_hash;

	} h;



	struct module		*owner;

include/uapi/linux/netlink.h

+1 −0
Original line number Diff line number Diff line
@@ -27,6 +27,7 @@ 
#define NETLINK_ECRYPTFS	19

#define NETLINK_RDMA		20

#define NETLINK_CRYPTO		21	/* Crypto layer */

#define NETLINK_SMC		22	/* SMC monitoring */



#define NETLINK_INET_DIAG	NETLINK_SOCK_DIAG

include/uapi/linux/smc_diag.h

0 → 100644
+85 −0
Original line number Diff line number Diff line 
#ifndef _UAPI_SMC_DIAG_H_

#define _UAPI_SMC_DIAG_H_



#include <linux/types.h>

#include <linux/inet_diag.h>

#include <rdma/ib_verbs.h>



/* Request structure */

struct smc_diag_req {

	__u8	diag_family;

	__u8	pad[2];

	__u8	diag_ext;		/* Query extended information */

	struct inet_diag_sockid	id;

};



/* Base info structure. It contains socket identity (addrs/ports/cookie) based

 * on the internal clcsock, and more SMC-related socket data

 */

struct smc_diag_msg {

	__u8	diag_family;

	__u8	diag_state;

	__u8	diag_fallback;

	__u8	diag_shutdown;

	struct inet_diag_sockid id;



	__u32	diag_uid;

	__u64	diag_inode;

};



/* Extensions */



enum {

	SMC_DIAG_NONE,

	SMC_DIAG_CONNINFO,

	SMC_DIAG_LGRINFO,

	SMC_DIAG_SHUTDOWN,

	__SMC_DIAG_MAX,

};



#define SMC_DIAG_MAX (__SMC_DIAG_MAX - 1)



/* SMC_DIAG_CONNINFO */



struct smc_diag_cursor {

	__u16	reserved;

	__u16	wrap;

	__u32	count;

};



struct smc_diag_conninfo {

	__u32			token;		/* unique connection id */

	__u32			sndbuf_size;	/* size of send buffer */

	__u32			rmbe_size;	/* size of RMB element */

	__u32			peer_rmbe_size;	/* size of peer RMB element */

	/* local RMB element cursors */

	struct smc_diag_cursor	rx_prod;	/* received producer cursor */

	struct smc_diag_cursor	rx_cons;	/* received consumer cursor */

	/* peer RMB element cursors */

	struct smc_diag_cursor	tx_prod;	/* sent producer cursor */

	struct smc_diag_cursor	tx_cons;	/* sent consumer cursor */

	__u8			rx_prod_flags;	/* received producer flags */

	__u8			rx_conn_state_flags; /* recvd connection flags*/

	__u8			tx_prod_flags;	/* sent producer flags */

	__u8			tx_conn_state_flags; /* sent connection flags*/

	/* send buffer cursors */

	struct smc_diag_cursor	tx_prep;	/* prepared to be sent cursor */

	struct smc_diag_cursor	tx_sent;	/* sent cursor */

	struct smc_diag_cursor	tx_fin;		/* confirmed sent cursor */

};



/* SMC_DIAG_LINKINFO */



struct smc_diag_linkinfo {

	__u8 link_id;			/* link identifier */

	__u8 ibname[IB_DEVICE_NAME_MAX]; /* name of the RDMA device */

	__u8 ibport;			/* RDMA device port number */

	__u8 gid[40];			/* local GID */

	__u8 peer_gid[40];		/* peer GID */

};



struct smc_diag_lgrinfo {

	struct smc_diag_linkinfo	lnk[1];

	__u8				role;

};

#endif /* _UAPI_SMC_DIAG_H_ */

net/smc/Kconfig

+9 −0
Original line number Diff line number Diff line
@@ -9,3 +9,12 @@ config SMC 
	  a separate socket family SMC.



	  Select this option if you want to run SMC socket applications



config SMC_DIAG

	tristate "SMC: socket monitoring interface"

	depends on SMC

	---help---

	  Support for SMC socket monitoring interface used by tools such as

	  smcss.



	  if unsure, say Y.