Commit d324a2ca authored by Alexandra Winter's avatar Alexandra Winter Committed by Paolo Abeni
Browse files

dibs: Register smc as dibs_client 



Formally register smc as dibs client. Functionality will be moved by
follow-on patches from ism_client to dibs_client until eventually
ism_client can be removed.
As DIBS is only a shim layer without any dependencies, we can depend SMC
on DIBS without adding indirect dependencies. A follow-on patch will
remove dependency of SMC on ISM.

Signed-off-by: default avatarAlexandra Winter <wintera@linux.ibm.com>
Reviewed-by: default avatarJulian Ruess <julianr@linux.ibm.com>
Link: https://patch.msgid.link/20250918110500.1731261-5-wintera@linux.ibm.com


Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
parent 35758b00

arch/s390/configs/debug_defconfig

+1 −0
Original line number Diff line number Diff line
@@ -120,6 +120,7 @@ CONFIG_UNIX=y 
CONFIG_UNIX_DIAG=m

CONFIG_XFRM_USER=m

CONFIG_NET_KEY=m

CONFIG_DIBS=y

CONFIG_SMC_DIAG=m

CONFIG_SMC_LO=y

CONFIG_INET=y

arch/s390/configs/defconfig

+1 −0
Original line number Diff line number Diff line
@@ -111,6 +111,7 @@ CONFIG_UNIX=y 
CONFIG_UNIX_DIAG=m

CONFIG_XFRM_USER=m

CONFIG_NET_KEY=m

CONFIG_DIBS=y

CONFIG_SMC_DIAG=m

CONFIG_SMC_LO=y

CONFIG_INET=y

drivers/dibs/dibs_main.c

+35 −0
Original line number Diff line number Diff line
@@ -20,6 +20,41 @@ MODULE_LICENSE("GPL"); 
/* use an array rather a list for fast mapping: */

static struct dibs_client *clients[MAX_DIBS_CLIENTS];

static u8 max_client;

static DEFINE_MUTEX(clients_lock);



int dibs_register_client(struct dibs_client *client)

{

	int i, rc = -ENOSPC;



	mutex_lock(&clients_lock);

	for (i = 0; i < MAX_DIBS_CLIENTS; ++i) {

		if (!clients[i]) {

			clients[i] = client;

			client->id = i;

			if (i == max_client)

				max_client++;

			rc = 0;

			break;

		}

	}

	mutex_unlock(&clients_lock);



	return rc;

}

EXPORT_SYMBOL_GPL(dibs_register_client);



int dibs_unregister_client(struct dibs_client *client)

{

	int rc = 0;



	mutex_lock(&clients_lock);

	clients[client->id] = NULL;

	if (client->id + 1 == max_client)

		max_client--;

	mutex_unlock(&clients_lock);

	return rc;

}

EXPORT_SYMBOL_GPL(dibs_unregister_client);



static int __init dibs_init(void)

{

include/linux/dibs.h

+23 −0
Original line number Diff line number Diff line
@@ -33,10 +33,33 @@ 
 * clients.

 */



/* DIBS client

 * -----------

 */

#define MAX_DIBS_CLIENTS	8



struct dibs_client {

	/* client name for logging and debugging purposes */

	const char *name;

	/* client index - provided and used by dibs layer */

	u8 id;

};



/* Functions to be called by dibs clients:

 */

/**

 * dibs_register_client() - register a client with dibs layer

 * @client: this client

 *

 * Return: zero on success.

 */

int dibs_register_client(struct dibs_client *client);

/**

 * dibs_unregister_client() - unregister a client with dibs layer

 * @client: this client

 *

 * Return: zero on success.

 */

int dibs_unregister_client(struct dibs_client *client);



#endif	/* _DIBS_H */

net/smc/Kconfig

+1 −1
Original line number Diff line number Diff line 
# SPDX-License-Identifier: GPL-2.0-only

config SMC

	tristate "SMC socket protocol family"

	depends on INET && INFINIBAND

	depends on INET && INFINIBAND && DIBS

	depends on m || ISM != m

	help

	  SMC-R provides a "sockets over RDMA" solution making use of