1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
3 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
4 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
10 /* Copy argument and remove trailing CR. Return the new length. */
11 static int sanitize_arg(const char *val, char *intf, int intf_len)
19 for (len = 0; len < intf_len - 1 && val[len] && val[len] != '\n'; len++)
23 if (len == 0 || (val[len] != 0 && val[len] != '\n'))
29 static int rxe_param_set_add(const char *val, const struct kernel_param *kp)
34 struct net_device *ndev;
35 struct rxe_dev *exists;
37 if (!rxe_initialized) {
38 pr_err("Module parameters are not supported, use rdma link add or rxe_cfg\n");
42 len = sanitize_arg(val, intf, sizeof(intf));
44 pr_err("add: invalid interface name\n");
48 ndev = dev_get_by_name(&init_net, intf);
50 pr_err("interface %s not found\n", intf);
54 if (is_vlan_dev(ndev)) {
55 pr_err("rxe creation allowed on top of a real device only\n");
60 exists = rxe_get_dev_from_net(ndev);
62 ib_device_put(&exists->ib_dev);
63 pr_err("already configured on %s\n", intf);
68 err = rxe_net_add("rxe%d", ndev);
70 pr_err("failed to add %s\n", intf);
79 static int rxe_param_set_remove(const char *val, const struct kernel_param *kp)
83 struct ib_device *ib_dev;
85 len = sanitize_arg(val, intf, sizeof(intf));
87 pr_err("add: invalid interface name\n");
91 if (strncmp("all", intf, len) == 0) {
92 pr_info("rxe_sys: remove all");
93 ib_unregister_driver(RDMA_DRIVER_RXE);
97 ib_dev = ib_device_get_by_name(intf, RDMA_DRIVER_RXE);
99 pr_err("not configured on %s\n", intf);
103 ib_unregister_device_and_put(ib_dev);
108 static const struct kernel_param_ops rxe_add_ops = {
109 .set = rxe_param_set_add,
112 static const struct kernel_param_ops rxe_remove_ops = {
113 .set = rxe_param_set_remove,
116 module_param_cb(add, &rxe_add_ops, NULL, 0200);
117 MODULE_PARM_DESC(add, "DEPRECATED. Create RXE device over network interface");
118 module_param_cb(remove, &rxe_remove_ops, NULL, 0200);
119 MODULE_PARM_DESC(remove, "DEPRECATED. Remove RXE device over network interface");