// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
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/*
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* Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
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* Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
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*/
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#include "rxe.h"
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#include "rxe_net.h"
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/* Copy argument and remove trailing CR. Return the new length. */
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static int sanitize_arg(const char *val, char *intf, int intf_len)
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{
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int len;
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if (!val)
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return 0;
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/* Remove newline. */
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for (len = 0; len < intf_len - 1 && val[len] && val[len] != '\n'; len++)
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intf[len] = val[len];
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intf[len] = 0;
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if (len == 0 || (val[len] != 0 && val[len] != '\n'))
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return 0;
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return len;
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}
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static int rxe_param_set_add(const char *val, const struct kernel_param *kp)
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{
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int len;
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int err = 0;
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char intf[32];
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struct net_device *ndev;
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struct rxe_dev *exists;
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if (!rxe_initialized) {
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pr_err("Module parameters are not supported, use rdma link add or rxe_cfg\n");
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return -EAGAIN;
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}
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len = sanitize_arg(val, intf, sizeof(intf));
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if (!len) {
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pr_err("add: invalid interface name\n");
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return -EINVAL;
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}
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ndev = dev_get_by_name(&init_net, intf);
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if (!ndev) {
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pr_err("interface %s not found\n", intf);
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return -EINVAL;
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}
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if (is_vlan_dev(ndev)) {
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pr_err("rxe creation allowed on top of a real device only\n");
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err = -EPERM;
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goto err;
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}
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exists = rxe_get_dev_from_net(ndev);
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if (exists) {
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ib_device_put(&exists->ib_dev);
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pr_err("already configured on %s\n", intf);
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err = -EINVAL;
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goto err;
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}
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err = rxe_net_add("rxe%d", ndev);
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if (err) {
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pr_err("failed to add %s\n", intf);
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goto err;
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}
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err:
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dev_put(ndev);
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return err;
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}
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static int rxe_param_set_remove(const char *val, const struct kernel_param *kp)
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{
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int len;
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char intf[32];
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struct ib_device *ib_dev;
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len = sanitize_arg(val, intf, sizeof(intf));
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if (!len) {
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pr_err("add: invalid interface name\n");
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return -EINVAL;
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}
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if (strncmp("all", intf, len) == 0) {
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pr_info("rxe_sys: remove all");
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ib_unregister_driver(RDMA_DRIVER_RXE);
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return 0;
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}
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ib_dev = ib_device_get_by_name(intf, RDMA_DRIVER_RXE);
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if (!ib_dev) {
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pr_err("not configured on %s\n", intf);
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return -EINVAL;
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}
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ib_unregister_device_and_put(ib_dev);
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return 0;
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}
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static const struct kernel_param_ops rxe_add_ops = {
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.set = rxe_param_set_add,
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};
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static const struct kernel_param_ops rxe_remove_ops = {
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.set = rxe_param_set_remove,
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};
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module_param_cb(add, &rxe_add_ops, NULL, 0200);
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MODULE_PARM_DESC(add, "DEPRECATED. Create RXE device over network interface");
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module_param_cb(remove, &rxe_remove_ops, NULL, 0200);
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MODULE_PARM_DESC(remove, "DEPRECATED. Remove RXE device over network interface");
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