120 lines
2.6 KiB
C
120 lines
2.6 KiB
C
// 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");
|