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Commit 05d940d3 authored by Leon Romanovsky's avatar Leon Romanovsky Committed by Doug Ledford
Browse files

RDMA/nldev: Allow IB device rename through RDMA netlink 



Provide an option to rename IB device name through RDMA netlink and
limit it to users with ADMIN capability only.

Signed-off-by: default avatarLeon Romanovsky <leonro@mellanox.com>
Reviewed-by: default avatarParav Pandit <parav@mellanox.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent d21943dd

drivers/infiniband/core/nldev.c

+34 −0
Original line number Diff line number Diff line
@@ -646,6 +646,36 @@ static int nldev_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh, 
	return err;

}



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

			  struct netlink_ext_ack *extack)

{

	struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];

	struct ib_device *device;

	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;



	if (tb[RDMA_NLDEV_ATTR_DEV_NAME]) {

		char name[IB_DEVICE_NAME_MAX] = {};



		nla_strlcpy(name, tb[RDMA_NLDEV_ATTR_DEV_NAME],

			    IB_DEVICE_NAME_MAX);

		err = ib_device_rename(device, name);

	}



	put_device(&device->dev);

	return err;

}



static int _nldev_get_dumpit(struct ib_device *device,

			     struct sk_buff *skb,

			     struct netlink_callback *cb,
@@ -1078,6 +1108,10 @@ static const struct rdma_nl_cbs nldev_cb_table[RDMA_NLDEV_NUM_OPS] = { 
		.doit = nldev_get_doit,

		.dump = nldev_get_dumpit,

	},

	[RDMA_NLDEV_CMD_SET] = {

		.doit = nldev_set_doit,

		.flags = RDMA_NL_ADMIN_PERM,

	},

	[RDMA_NLDEV_CMD_PORT_GET] = {

		.doit = nldev_port_get_doit,

		.dump = nldev_port_get_dumpit,

include/uapi/rdma/rdma_netlink.h

+2 −1
Original line number Diff line number Diff line
@@ -227,8 +227,9 @@ enum rdma_nldev_command { 
	RDMA_NLDEV_CMD_UNSPEC,



	RDMA_NLDEV_CMD_GET, /* can dump */

	RDMA_NLDEV_CMD_SET,



	/* 2 - 4 are free to use */

	/* 3 - 4 are free to use */



	RDMA_NLDEV_CMD_PORT_GET = 5, /* can dump */