From: Leon Romanovsky <leonro@xxxxxxxxxxxx> Provide an option to rename IB device name through RDMA netlink and limit it to users with ADMIN capability only. Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxxxx> --- drivers/infiniband/core/nldev.c | 33 +++++++++++++++++++++++++++++++++ include/uapi/rdma/rdma_netlink.h | 3 ++- 2 files changed, 35 insertions(+), 1 deletion(-) diff --git a/drivers/infiniband/core/nldev.c b/drivers/infiniband/core/nldev.c index 0385ab438320..64e1d12e9678 100644 --- a/drivers/infiniband/core/nldev.c +++ b/drivers/infiniband/core/nldev.c @@ -645,6 +645,35 @@ 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); + return ib_device_rename(device, name); + } + + return 0; +} + static int _nldev_get_dumpit(struct ib_device *device, struct sk_buff *skb, struct netlink_callback *cb, @@ -1077,6 +1106,10 @@ 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, diff --git a/include/uapi/rdma/rdma_netlink.h b/include/uapi/rdma/rdma_netlink.h index edba6351ac13..f9c41bf59efc 100644 --- a/include/uapi/rdma/rdma_netlink.h +++ b/include/uapi/rdma/rdma_netlink.h @@ -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 */ -- 2.14.4