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Commit e5c9469e authored by Leon Romanovsky's avatar Leon Romanovsky
Browse files

RDMA/netlink: Add nldev device doit implementation 



Provide ability to query specific device.

Signed-off-by: default avatarLeon Romanovsky <leonro@mellanox.com>
Reviewed-by: default avatarSteve Wise <swise@opengridcomputing.com>
parent b4c598a6

drivers/infiniband/core/nldev.c

+40 −0
Original line number Diff line number Diff line
@@ -53,6 +53,45 @@ static int fill_dev_info(struct sk_buff *msg, struct ib_device *device) 
	return 0;

}



static int nldev_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh,

			  struct netlink_ext_ack *extack)

{

	struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];

	struct ib_device *device;

	struct sk_buff *msg;

	u32 index;

	int err;



	err = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,

			  nldev_policy, extack);

	if (err || !tb[RDMA_NLDEV_ATTR_DEV_INDEX])

		return -EINVAL;



	index = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);



	device = __ib_device_get_by_index(index);

	if (!device)

		return -EINVAL;



	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);

	if (!msg)

		return -ENOMEM;



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

			RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_GET),

			0, 0);



	err = fill_dev_info(msg, device);

	if (err) {

		nlmsg_free(msg);

		return err;

	}



	nlmsg_end(msg, nlh);



	return rdma_nl_unicast(msg, NETLINK_CB(skb).portid);

}



static int _nldev_get_dumpit(struct ib_device *device,

			     struct sk_buff *skb,

			     struct netlink_callback *cb,
@@ -92,6 +131,7 @@ static int nldev_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb) 


static const struct rdma_nl_cbs nldev_cb_table[] = {

	[RDMA_NLDEV_CMD_GET] = {

		.doit = nldev_get_doit,

		.dump = nldev_get_dumpit,

	},

};