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