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Commit b4c598a6 authored by Leon Romanovsky's avatar Leon Romanovsky
Browse files

RDMA/netlink: Implement nldev device dumpit calback 



This patch adds the ability to return all available devices
together with their properties.

Signed-off-by: default avatarLeon Romanovsky <leonro@mellanox.com>
Reviewed-by: default avatarSteve Wise <swise@opengridcomputing.com>
parent 6c80b41a

drivers/infiniband/core/nldev.c

+63 −1
Original line number Original line Diff line number Diff line
@@ -30,13 +30,75 @@ 
 * POSSIBILITY OF SUCH DAMAGE.

 * POSSIBILITY OF SUCH DAMAGE.

 */

 */





#include <net/netlink.h>

#include <rdma/rdma_netlink.h>

#include <rdma/rdma_netlink.h>





#include "core_priv.h"

#include "core_priv.h"





static const struct nla_policy nldev_policy[RDMA_NLDEV_ATTR_MAX] = {

	[RDMA_NLDEV_ATTR_DEV_INDEX]     = { .type = NLA_U32 },

	[RDMA_NLDEV_ATTR_DEV_NAME]	= { .type = NLA_NUL_STRING,

					    .len = IB_DEVICE_NAME_MAX - 1},

	[RDMA_NLDEV_ATTR_PORT_INDEX]	= { .type = NLA_U32 },

};



static int fill_dev_info(struct sk_buff *msg, struct ib_device *device)

{

	if (nla_put_u32(msg, RDMA_NLDEV_ATTR_DEV_INDEX, device->index))

		return -EMSGSIZE;

	if (nla_put_string(msg, RDMA_NLDEV_ATTR_DEV_NAME, device->name))

		return -EMSGSIZE;

	if (nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, rdma_end_port(device)))

		return -EMSGSIZE;

	return 0;

}



static int _nldev_get_dumpit(struct ib_device *device,

			     struct sk_buff *skb,

			     struct netlink_callback *cb,

			     unsigned int idx)

{

	int start = cb->args[0];

	struct nlmsghdr *nlh;



	if (idx < start)

		return 0;



	nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,

			RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_GET),

			0, NLM_F_MULTI);



	if (fill_dev_info(skb, device)) {

		nlmsg_cancel(skb, nlh);

		goto out;

	}



	nlmsg_end(skb, nlh);



	idx++;



out:	cb->args[0] = idx;

	return skb->len;

}



static int nldev_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb)

{

	/*

	 * There is no need to take lock, because

	 * we are relying on ib_core's lists_rwsem

	 */

	return ib_enum_all_devs(_nldev_get_dumpit, skb, cb);

}



static const struct rdma_nl_cbs nldev_cb_table[] = {

	[RDMA_NLDEV_CMD_GET] = {

		.dump = nldev_get_dumpit,

	},

};



void __init nldev_init(void)

void __init nldev_init(void)

{

{

	rdma_nl_register(RDMA_NL_NLDEV, NULL);

	rdma_nl_register(RDMA_NL_NLDEV, nldev_cb_table);

}

}





void __exit nldev_exit(void)

void __exit nldev_exit(void)