mirror of https://gitee.com/openkylin/linux.git
944 lines
26 KiB
C
944 lines
26 KiB
C
/*
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* Copyright (c) 2018 Cumulus Networks. All rights reserved.
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* Copyright (c) 2018 David Ahern <dsa@cumulusnetworks.com>
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* Copyright (c) 2019 Mellanox Technologies. All rights reserved.
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*
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* This software is licensed under the GNU General License Version 2,
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* June 1991 as shown in the file COPYING in the top-level directory of this
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* source tree.
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*
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* THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS"
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* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE
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* OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
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* THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
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*/
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#include <linux/debugfs.h>
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#include <linux/device.h>
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#include <linux/etherdevice.h>
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#include <linux/inet.h>
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#include <linux/jiffies.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/mutex.h>
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#include <linux/random.h>
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#include <linux/rtnetlink.h>
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#include <linux/workqueue.h>
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#include <net/devlink.h>
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#include <net/ip.h>
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#include <uapi/linux/devlink.h>
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#include <uapi/linux/ip.h>
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#include <uapi/linux/udp.h>
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#include "netdevsim.h"
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static struct dentry *nsim_dev_ddir;
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#define NSIM_DEV_DUMMY_REGION_SIZE (1024 * 32)
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static ssize_t nsim_dev_take_snapshot_write(struct file *file,
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const char __user *data,
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size_t count, loff_t *ppos)
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{
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struct nsim_dev *nsim_dev = file->private_data;
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void *dummy_data;
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int err;
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u32 id;
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dummy_data = kmalloc(NSIM_DEV_DUMMY_REGION_SIZE, GFP_KERNEL);
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if (!dummy_data)
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return -ENOMEM;
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get_random_bytes(dummy_data, NSIM_DEV_DUMMY_REGION_SIZE);
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id = devlink_region_snapshot_id_get(priv_to_devlink(nsim_dev));
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err = devlink_region_snapshot_create(nsim_dev->dummy_region,
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dummy_data, id, kfree);
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if (err) {
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pr_err("Failed to create region snapshot\n");
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kfree(dummy_data);
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return err;
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}
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return count;
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}
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static const struct file_operations nsim_dev_take_snapshot_fops = {
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.open = simple_open,
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.write = nsim_dev_take_snapshot_write,
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.llseek = generic_file_llseek,
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};
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static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev)
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{
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char dev_ddir_name[sizeof(DRV_NAME) + 10];
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sprintf(dev_ddir_name, DRV_NAME "%u", nsim_dev->nsim_bus_dev->dev.id);
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nsim_dev->ddir = debugfs_create_dir(dev_ddir_name, nsim_dev_ddir);
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if (IS_ERR(nsim_dev->ddir))
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return PTR_ERR(nsim_dev->ddir);
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nsim_dev->ports_ddir = debugfs_create_dir("ports", nsim_dev->ddir);
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if (IS_ERR(nsim_dev->ports_ddir))
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return PTR_ERR(nsim_dev->ports_ddir);
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debugfs_create_bool("fw_update_status", 0600, nsim_dev->ddir,
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&nsim_dev->fw_update_status);
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debugfs_create_u32("max_macs", 0600, nsim_dev->ddir,
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&nsim_dev->max_macs);
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debugfs_create_bool("test1", 0600, nsim_dev->ddir,
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&nsim_dev->test1);
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nsim_dev->take_snapshot = debugfs_create_file("take_snapshot",
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0200,
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nsim_dev->ddir,
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nsim_dev,
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&nsim_dev_take_snapshot_fops);
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debugfs_create_bool("dont_allow_reload", 0600, nsim_dev->ddir,
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&nsim_dev->dont_allow_reload);
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debugfs_create_bool("fail_reload", 0600, nsim_dev->ddir,
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&nsim_dev->fail_reload);
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return 0;
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}
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static void nsim_dev_debugfs_exit(struct nsim_dev *nsim_dev)
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{
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debugfs_remove_recursive(nsim_dev->ports_ddir);
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debugfs_remove_recursive(nsim_dev->ddir);
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}
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static int nsim_dev_port_debugfs_init(struct nsim_dev *nsim_dev,
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struct nsim_dev_port *nsim_dev_port)
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{
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char port_ddir_name[16];
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char dev_link_name[32];
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sprintf(port_ddir_name, "%u", nsim_dev_port->port_index);
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nsim_dev_port->ddir = debugfs_create_dir(port_ddir_name,
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nsim_dev->ports_ddir);
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if (IS_ERR(nsim_dev_port->ddir))
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return PTR_ERR(nsim_dev_port->ddir);
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sprintf(dev_link_name, "../../../" DRV_NAME "%u",
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nsim_dev->nsim_bus_dev->dev.id);
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debugfs_create_symlink("dev", nsim_dev_port->ddir, dev_link_name);
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return 0;
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}
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static void nsim_dev_port_debugfs_exit(struct nsim_dev_port *nsim_dev_port)
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{
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debugfs_remove_recursive(nsim_dev_port->ddir);
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}
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static int nsim_dev_resources_register(struct devlink *devlink)
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{
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struct devlink_resource_size_params params = {
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.size_max = (u64)-1,
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.size_granularity = 1,
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.unit = DEVLINK_RESOURCE_UNIT_ENTRY
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};
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int err;
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/* Resources for IPv4 */
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err = devlink_resource_register(devlink, "IPv4", (u64)-1,
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NSIM_RESOURCE_IPV4,
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DEVLINK_RESOURCE_ID_PARENT_TOP,
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¶ms);
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if (err) {
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pr_err("Failed to register IPv4 top resource\n");
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goto out;
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}
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err = devlink_resource_register(devlink, "fib", (u64)-1,
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NSIM_RESOURCE_IPV4_FIB,
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NSIM_RESOURCE_IPV4, ¶ms);
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if (err) {
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pr_err("Failed to register IPv4 FIB resource\n");
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return err;
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}
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err = devlink_resource_register(devlink, "fib-rules", (u64)-1,
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NSIM_RESOURCE_IPV4_FIB_RULES,
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NSIM_RESOURCE_IPV4, ¶ms);
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if (err) {
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pr_err("Failed to register IPv4 FIB rules resource\n");
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return err;
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}
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/* Resources for IPv6 */
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err = devlink_resource_register(devlink, "IPv6", (u64)-1,
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NSIM_RESOURCE_IPV6,
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DEVLINK_RESOURCE_ID_PARENT_TOP,
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¶ms);
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if (err) {
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pr_err("Failed to register IPv6 top resource\n");
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goto out;
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}
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err = devlink_resource_register(devlink, "fib", (u64)-1,
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NSIM_RESOURCE_IPV6_FIB,
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NSIM_RESOURCE_IPV6, ¶ms);
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if (err) {
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pr_err("Failed to register IPv6 FIB resource\n");
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return err;
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}
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err = devlink_resource_register(devlink, "fib-rules", (u64)-1,
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NSIM_RESOURCE_IPV6_FIB_RULES,
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NSIM_RESOURCE_IPV6, ¶ms);
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if (err) {
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pr_err("Failed to register IPv6 FIB rules resource\n");
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return err;
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}
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out:
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return err;
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}
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enum nsim_devlink_param_id {
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NSIM_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
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NSIM_DEVLINK_PARAM_ID_TEST1,
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};
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static const struct devlink_param nsim_devlink_params[] = {
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DEVLINK_PARAM_GENERIC(MAX_MACS,
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BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
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NULL, NULL, NULL),
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DEVLINK_PARAM_DRIVER(NSIM_DEVLINK_PARAM_ID_TEST1,
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"test1", DEVLINK_PARAM_TYPE_BOOL,
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BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
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NULL, NULL, NULL),
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};
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static void nsim_devlink_set_params_init_values(struct nsim_dev *nsim_dev,
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struct devlink *devlink)
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{
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union devlink_param_value value;
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value.vu32 = nsim_dev->max_macs;
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devlink_param_driverinit_value_set(devlink,
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DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
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value);
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value.vbool = nsim_dev->test1;
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devlink_param_driverinit_value_set(devlink,
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NSIM_DEVLINK_PARAM_ID_TEST1,
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value);
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}
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static void nsim_devlink_param_load_driverinit_values(struct devlink *devlink)
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{
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struct nsim_dev *nsim_dev = devlink_priv(devlink);
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union devlink_param_value saved_value;
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int err;
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err = devlink_param_driverinit_value_get(devlink,
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DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
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&saved_value);
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if (!err)
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nsim_dev->max_macs = saved_value.vu32;
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err = devlink_param_driverinit_value_get(devlink,
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NSIM_DEVLINK_PARAM_ID_TEST1,
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&saved_value);
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if (!err)
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nsim_dev->test1 = saved_value.vbool;
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}
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#define NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX 16
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static int nsim_dev_dummy_region_init(struct nsim_dev *nsim_dev,
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struct devlink *devlink)
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{
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nsim_dev->dummy_region =
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devlink_region_create(devlink, "dummy",
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NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX,
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NSIM_DEV_DUMMY_REGION_SIZE);
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return PTR_ERR_OR_ZERO(nsim_dev->dummy_region);
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}
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static void nsim_dev_dummy_region_exit(struct nsim_dev *nsim_dev)
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{
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devlink_region_destroy(nsim_dev->dummy_region);
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}
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struct nsim_trap_item {
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void *trap_ctx;
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enum devlink_trap_action action;
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};
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struct nsim_trap_data {
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struct delayed_work trap_report_dw;
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struct nsim_trap_item *trap_items_arr;
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struct nsim_dev *nsim_dev;
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spinlock_t trap_lock; /* Protects trap_items_arr */
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};
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/* All driver-specific traps must be documented in
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* Documentation/networking/devlink/netdevsim.rst
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*/
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enum {
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NSIM_TRAP_ID_BASE = DEVLINK_TRAP_GENERIC_ID_MAX,
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NSIM_TRAP_ID_FID_MISS,
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};
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#define NSIM_TRAP_NAME_FID_MISS "fid_miss"
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#define NSIM_TRAP_METADATA DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT
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#define NSIM_TRAP_DROP(_id, _group_id) \
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DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \
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DEVLINK_TRAP_GROUP_GENERIC(_group_id), \
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NSIM_TRAP_METADATA)
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#define NSIM_TRAP_EXCEPTION(_id, _group_id) \
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DEVLINK_TRAP_GENERIC(EXCEPTION, TRAP, _id, \
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DEVLINK_TRAP_GROUP_GENERIC(_group_id), \
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NSIM_TRAP_METADATA)
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#define NSIM_TRAP_DRIVER_EXCEPTION(_id, _group_id) \
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DEVLINK_TRAP_DRIVER(EXCEPTION, TRAP, NSIM_TRAP_ID_##_id, \
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NSIM_TRAP_NAME_##_id, \
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DEVLINK_TRAP_GROUP_GENERIC(_group_id), \
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NSIM_TRAP_METADATA)
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static const struct devlink_trap nsim_traps_arr[] = {
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NSIM_TRAP_DROP(SMAC_MC, L2_DROPS),
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NSIM_TRAP_DROP(VLAN_TAG_MISMATCH, L2_DROPS),
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NSIM_TRAP_DROP(INGRESS_VLAN_FILTER, L2_DROPS),
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NSIM_TRAP_DROP(INGRESS_STP_FILTER, L2_DROPS),
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NSIM_TRAP_DROP(EMPTY_TX_LIST, L2_DROPS),
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NSIM_TRAP_DROP(PORT_LOOPBACK_FILTER, L2_DROPS),
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NSIM_TRAP_DRIVER_EXCEPTION(FID_MISS, L2_DROPS),
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NSIM_TRAP_DROP(BLACKHOLE_ROUTE, L3_DROPS),
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NSIM_TRAP_EXCEPTION(TTL_ERROR, L3_DROPS),
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NSIM_TRAP_DROP(TAIL_DROP, BUFFER_DROPS),
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};
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#define NSIM_TRAP_L4_DATA_LEN 100
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static struct sk_buff *nsim_dev_trap_skb_build(void)
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{
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int tot_len, data_len = NSIM_TRAP_L4_DATA_LEN;
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struct sk_buff *skb;
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struct udphdr *udph;
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struct ethhdr *eth;
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struct iphdr *iph;
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skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
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if (!skb)
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return NULL;
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tot_len = sizeof(struct iphdr) + sizeof(struct udphdr) + data_len;
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skb_reset_mac_header(skb);
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eth = skb_put(skb, sizeof(struct ethhdr));
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eth_random_addr(eth->h_dest);
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eth_random_addr(eth->h_source);
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eth->h_proto = htons(ETH_P_IP);
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skb->protocol = htons(ETH_P_IP);
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skb_set_network_header(skb, skb->len);
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iph = skb_put(skb, sizeof(struct iphdr));
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iph->protocol = IPPROTO_UDP;
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iph->saddr = in_aton("192.0.2.1");
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iph->daddr = in_aton("198.51.100.1");
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iph->version = 0x4;
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iph->frag_off = 0;
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iph->ihl = 0x5;
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iph->tot_len = htons(tot_len);
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iph->ttl = 100;
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iph->check = 0;
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iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
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skb_set_transport_header(skb, skb->len);
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udph = skb_put_zero(skb, sizeof(struct udphdr) + data_len);
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get_random_bytes(&udph->source, sizeof(u16));
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get_random_bytes(&udph->dest, sizeof(u16));
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udph->len = htons(sizeof(struct udphdr) + data_len);
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return skb;
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}
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static void nsim_dev_trap_report(struct nsim_dev_port *nsim_dev_port)
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{
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struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev;
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struct devlink *devlink = priv_to_devlink(nsim_dev);
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struct nsim_trap_data *nsim_trap_data;
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int i;
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nsim_trap_data = nsim_dev->trap_data;
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spin_lock(&nsim_trap_data->trap_lock);
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for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) {
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struct nsim_trap_item *nsim_trap_item;
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struct sk_buff *skb;
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nsim_trap_item = &nsim_trap_data->trap_items_arr[i];
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if (nsim_trap_item->action == DEVLINK_TRAP_ACTION_DROP)
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continue;
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skb = nsim_dev_trap_skb_build();
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if (!skb)
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continue;
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skb->dev = nsim_dev_port->ns->netdev;
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/* Trapped packets are usually passed to devlink in softIRQ,
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* but in this case they are generated in a workqueue. Disable
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* softIRQs to prevent lockdep from complaining about
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* "incosistent lock state".
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*/
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local_bh_disable();
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devlink_trap_report(devlink, skb, nsim_trap_item->trap_ctx,
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&nsim_dev_port->devlink_port);
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local_bh_enable();
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consume_skb(skb);
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}
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spin_unlock(&nsim_trap_data->trap_lock);
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}
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|
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#define NSIM_TRAP_REPORT_INTERVAL_MS 100
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static void nsim_dev_trap_report_work(struct work_struct *work)
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{
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struct nsim_trap_data *nsim_trap_data;
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struct nsim_dev_port *nsim_dev_port;
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struct nsim_dev *nsim_dev;
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nsim_trap_data = container_of(work, struct nsim_trap_data,
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trap_report_dw.work);
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nsim_dev = nsim_trap_data->nsim_dev;
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|
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/* For each running port and enabled packet trap, generate a UDP
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* packet with a random 5-tuple and report it.
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*/
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mutex_lock(&nsim_dev->port_list_lock);
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list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) {
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if (!netif_running(nsim_dev_port->ns->netdev))
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continue;
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nsim_dev_trap_report(nsim_dev_port);
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}
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mutex_unlock(&nsim_dev->port_list_lock);
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schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw,
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msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
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}
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|
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static int nsim_dev_traps_init(struct devlink *devlink)
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{
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struct nsim_dev *nsim_dev = devlink_priv(devlink);
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struct nsim_trap_data *nsim_trap_data;
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int err;
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nsim_trap_data = kzalloc(sizeof(*nsim_trap_data), GFP_KERNEL);
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if (!nsim_trap_data)
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return -ENOMEM;
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|
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nsim_trap_data->trap_items_arr = kcalloc(ARRAY_SIZE(nsim_traps_arr),
|
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sizeof(struct nsim_trap_item),
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GFP_KERNEL);
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if (!nsim_trap_data->trap_items_arr) {
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err = -ENOMEM;
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goto err_trap_data_free;
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}
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|
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/* The lock is used to protect the action state of the registered
|
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* traps. The value is written by user and read in delayed work when
|
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* iterating over all the traps.
|
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*/
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spin_lock_init(&nsim_trap_data->trap_lock);
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nsim_trap_data->nsim_dev = nsim_dev;
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nsim_dev->trap_data = nsim_trap_data;
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|
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err = devlink_traps_register(devlink, nsim_traps_arr,
|
|
ARRAY_SIZE(nsim_traps_arr), NULL);
|
|
if (err)
|
|
goto err_trap_items_free;
|
|
|
|
INIT_DELAYED_WORK(&nsim_dev->trap_data->trap_report_dw,
|
|
nsim_dev_trap_report_work);
|
|
schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw,
|
|
msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
|
|
|
|
return 0;
|
|
|
|
err_trap_items_free:
|
|
kfree(nsim_trap_data->trap_items_arr);
|
|
err_trap_data_free:
|
|
kfree(nsim_trap_data);
|
|
return err;
|
|
}
|
|
|
|
static void nsim_dev_traps_exit(struct devlink *devlink)
|
|
{
|
|
struct nsim_dev *nsim_dev = devlink_priv(devlink);
|
|
|
|
cancel_delayed_work_sync(&nsim_dev->trap_data->trap_report_dw);
|
|
devlink_traps_unregister(devlink, nsim_traps_arr,
|
|
ARRAY_SIZE(nsim_traps_arr));
|
|
kfree(nsim_dev->trap_data->trap_items_arr);
|
|
kfree(nsim_dev->trap_data);
|
|
}
|
|
|
|
static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
|
|
struct netlink_ext_ack *extack);
|
|
static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev);
|
|
|
|
static int nsim_dev_reload_down(struct devlink *devlink, bool netns_change,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct nsim_dev *nsim_dev = devlink_priv(devlink);
|
|
|
|
if (nsim_dev->dont_allow_reload) {
|
|
/* For testing purposes, user set debugfs dont_allow_reload
|
|
* value to true. So forbid it.
|
|
*/
|
|
NL_SET_ERR_MSG_MOD(extack, "User forbid the reload for testing purposes");
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
nsim_dev_reload_destroy(nsim_dev);
|
|
return 0;
|
|
}
|
|
|
|
static int nsim_dev_reload_up(struct devlink *devlink,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct nsim_dev *nsim_dev = devlink_priv(devlink);
|
|
|
|
if (nsim_dev->fail_reload) {
|
|
/* For testing purposes, user set debugfs fail_reload
|
|
* value to true. Fail right away.
|
|
*/
|
|
NL_SET_ERR_MSG_MOD(extack, "User setup the reload to fail for testing purposes");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return nsim_dev_reload_create(nsim_dev, extack);
|
|
}
|
|
|
|
static int nsim_dev_info_get(struct devlink *devlink,
|
|
struct devlink_info_req *req,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
return devlink_info_driver_name_put(req, DRV_NAME);
|
|
}
|
|
|
|
#define NSIM_DEV_FLASH_SIZE 500000
|
|
#define NSIM_DEV_FLASH_CHUNK_SIZE 1000
|
|
#define NSIM_DEV_FLASH_CHUNK_TIME_MS 10
|
|
|
|
static int nsim_dev_flash_update(struct devlink *devlink, const char *file_name,
|
|
const char *component,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct nsim_dev *nsim_dev = devlink_priv(devlink);
|
|
int i;
|
|
|
|
if (nsim_dev->fw_update_status) {
|
|
devlink_flash_update_begin_notify(devlink);
|
|
devlink_flash_update_status_notify(devlink,
|
|
"Preparing to flash",
|
|
component, 0, 0);
|
|
}
|
|
|
|
for (i = 0; i < NSIM_DEV_FLASH_SIZE / NSIM_DEV_FLASH_CHUNK_SIZE; i++) {
|
|
if (nsim_dev->fw_update_status)
|
|
devlink_flash_update_status_notify(devlink, "Flashing",
|
|
component,
|
|
i * NSIM_DEV_FLASH_CHUNK_SIZE,
|
|
NSIM_DEV_FLASH_SIZE);
|
|
msleep(NSIM_DEV_FLASH_CHUNK_TIME_MS);
|
|
}
|
|
|
|
if (nsim_dev->fw_update_status) {
|
|
devlink_flash_update_status_notify(devlink, "Flashing",
|
|
component,
|
|
NSIM_DEV_FLASH_SIZE,
|
|
NSIM_DEV_FLASH_SIZE);
|
|
devlink_flash_update_status_notify(devlink, "Flashing done",
|
|
component, 0, 0);
|
|
devlink_flash_update_end_notify(devlink);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct nsim_trap_item *
|
|
nsim_dev_trap_item_lookup(struct nsim_dev *nsim_dev, u16 trap_id)
|
|
{
|
|
struct nsim_trap_data *nsim_trap_data = nsim_dev->trap_data;
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) {
|
|
if (nsim_traps_arr[i].id == trap_id)
|
|
return &nsim_trap_data->trap_items_arr[i];
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int nsim_dev_devlink_trap_init(struct devlink *devlink,
|
|
const struct devlink_trap *trap,
|
|
void *trap_ctx)
|
|
{
|
|
struct nsim_dev *nsim_dev = devlink_priv(devlink);
|
|
struct nsim_trap_item *nsim_trap_item;
|
|
|
|
nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id);
|
|
if (WARN_ON(!nsim_trap_item))
|
|
return -ENOENT;
|
|
|
|
nsim_trap_item->trap_ctx = trap_ctx;
|
|
nsim_trap_item->action = trap->init_action;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
nsim_dev_devlink_trap_action_set(struct devlink *devlink,
|
|
const struct devlink_trap *trap,
|
|
enum devlink_trap_action action)
|
|
{
|
|
struct nsim_dev *nsim_dev = devlink_priv(devlink);
|
|
struct nsim_trap_item *nsim_trap_item;
|
|
|
|
nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id);
|
|
if (WARN_ON(!nsim_trap_item))
|
|
return -ENOENT;
|
|
|
|
spin_lock(&nsim_dev->trap_data->trap_lock);
|
|
nsim_trap_item->action = action;
|
|
spin_unlock(&nsim_dev->trap_data->trap_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct devlink_ops nsim_dev_devlink_ops = {
|
|
.reload_down = nsim_dev_reload_down,
|
|
.reload_up = nsim_dev_reload_up,
|
|
.info_get = nsim_dev_info_get,
|
|
.flash_update = nsim_dev_flash_update,
|
|
.trap_init = nsim_dev_devlink_trap_init,
|
|
.trap_action_set = nsim_dev_devlink_trap_action_set,
|
|
};
|
|
|
|
#define NSIM_DEV_MAX_MACS_DEFAULT 32
|
|
#define NSIM_DEV_TEST1_DEFAULT true
|
|
|
|
static int __nsim_dev_port_add(struct nsim_dev *nsim_dev,
|
|
unsigned int port_index)
|
|
{
|
|
struct nsim_dev_port *nsim_dev_port;
|
|
struct devlink_port *devlink_port;
|
|
int err;
|
|
|
|
nsim_dev_port = kzalloc(sizeof(*nsim_dev_port), GFP_KERNEL);
|
|
if (!nsim_dev_port)
|
|
return -ENOMEM;
|
|
nsim_dev_port->port_index = port_index;
|
|
|
|
devlink_port = &nsim_dev_port->devlink_port;
|
|
devlink_port_attrs_set(devlink_port, DEVLINK_PORT_FLAVOUR_PHYSICAL,
|
|
port_index + 1, 0, 0,
|
|
nsim_dev->switch_id.id,
|
|
nsim_dev->switch_id.id_len);
|
|
err = devlink_port_register(priv_to_devlink(nsim_dev), devlink_port,
|
|
port_index);
|
|
if (err)
|
|
goto err_port_free;
|
|
|
|
err = nsim_dev_port_debugfs_init(nsim_dev, nsim_dev_port);
|
|
if (err)
|
|
goto err_dl_port_unregister;
|
|
|
|
nsim_dev_port->ns = nsim_create(nsim_dev, nsim_dev_port);
|
|
if (IS_ERR(nsim_dev_port->ns)) {
|
|
err = PTR_ERR(nsim_dev_port->ns);
|
|
goto err_port_debugfs_exit;
|
|
}
|
|
|
|
devlink_port_type_eth_set(devlink_port, nsim_dev_port->ns->netdev);
|
|
list_add(&nsim_dev_port->list, &nsim_dev->port_list);
|
|
|
|
return 0;
|
|
|
|
err_port_debugfs_exit:
|
|
nsim_dev_port_debugfs_exit(nsim_dev_port);
|
|
err_dl_port_unregister:
|
|
devlink_port_unregister(devlink_port);
|
|
err_port_free:
|
|
kfree(nsim_dev_port);
|
|
return err;
|
|
}
|
|
|
|
static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port)
|
|
{
|
|
struct devlink_port *devlink_port = &nsim_dev_port->devlink_port;
|
|
|
|
list_del(&nsim_dev_port->list);
|
|
devlink_port_type_clear(devlink_port);
|
|
nsim_destroy(nsim_dev_port->ns);
|
|
nsim_dev_port_debugfs_exit(nsim_dev_port);
|
|
devlink_port_unregister(devlink_port);
|
|
kfree(nsim_dev_port);
|
|
}
|
|
|
|
static void nsim_dev_port_del_all(struct nsim_dev *nsim_dev)
|
|
{
|
|
struct nsim_dev_port *nsim_dev_port, *tmp;
|
|
|
|
mutex_lock(&nsim_dev->port_list_lock);
|
|
list_for_each_entry_safe(nsim_dev_port, tmp,
|
|
&nsim_dev->port_list, list)
|
|
__nsim_dev_port_del(nsim_dev_port);
|
|
mutex_unlock(&nsim_dev->port_list_lock);
|
|
}
|
|
|
|
static int nsim_dev_port_add_all(struct nsim_dev *nsim_dev,
|
|
unsigned int port_count)
|
|
{
|
|
int i, err;
|
|
|
|
for (i = 0; i < port_count; i++) {
|
|
err = __nsim_dev_port_add(nsim_dev, i);
|
|
if (err)
|
|
goto err_port_del_all;
|
|
}
|
|
return 0;
|
|
|
|
err_port_del_all:
|
|
nsim_dev_port_del_all(nsim_dev);
|
|
return err;
|
|
}
|
|
|
|
static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev;
|
|
struct devlink *devlink;
|
|
int err;
|
|
|
|
devlink = priv_to_devlink(nsim_dev);
|
|
nsim_dev = devlink_priv(devlink);
|
|
INIT_LIST_HEAD(&nsim_dev->port_list);
|
|
mutex_init(&nsim_dev->port_list_lock);
|
|
nsim_dev->fw_update_status = true;
|
|
|
|
nsim_dev->fib_data = nsim_fib_create(devlink, extack);
|
|
if (IS_ERR(nsim_dev->fib_data))
|
|
return PTR_ERR(nsim_dev->fib_data);
|
|
|
|
nsim_devlink_param_load_driverinit_values(devlink);
|
|
|
|
err = nsim_dev_dummy_region_init(nsim_dev, devlink);
|
|
if (err)
|
|
goto err_fib_destroy;
|
|
|
|
err = nsim_dev_traps_init(devlink);
|
|
if (err)
|
|
goto err_dummy_region_exit;
|
|
|
|
err = nsim_dev_health_init(nsim_dev, devlink);
|
|
if (err)
|
|
goto err_traps_exit;
|
|
|
|
err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count);
|
|
if (err)
|
|
goto err_health_exit;
|
|
|
|
nsim_dev->take_snapshot = debugfs_create_file("take_snapshot",
|
|
0200,
|
|
nsim_dev->ddir,
|
|
nsim_dev,
|
|
&nsim_dev_take_snapshot_fops);
|
|
return 0;
|
|
|
|
err_health_exit:
|
|
nsim_dev_health_exit(nsim_dev);
|
|
err_traps_exit:
|
|
nsim_dev_traps_exit(devlink);
|
|
err_dummy_region_exit:
|
|
nsim_dev_dummy_region_exit(nsim_dev);
|
|
err_fib_destroy:
|
|
nsim_fib_destroy(devlink, nsim_dev->fib_data);
|
|
return err;
|
|
}
|
|
|
|
int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev)
|
|
{
|
|
struct nsim_dev *nsim_dev;
|
|
struct devlink *devlink;
|
|
int err;
|
|
|
|
devlink = devlink_alloc(&nsim_dev_devlink_ops, sizeof(*nsim_dev));
|
|
if (!devlink)
|
|
return -ENOMEM;
|
|
devlink_net_set(devlink, nsim_bus_dev->initial_net);
|
|
nsim_dev = devlink_priv(devlink);
|
|
nsim_dev->nsim_bus_dev = nsim_bus_dev;
|
|
nsim_dev->switch_id.id_len = sizeof(nsim_dev->switch_id.id);
|
|
get_random_bytes(nsim_dev->switch_id.id, nsim_dev->switch_id.id_len);
|
|
INIT_LIST_HEAD(&nsim_dev->port_list);
|
|
mutex_init(&nsim_dev->port_list_lock);
|
|
nsim_dev->fw_update_status = true;
|
|
nsim_dev->max_macs = NSIM_DEV_MAX_MACS_DEFAULT;
|
|
nsim_dev->test1 = NSIM_DEV_TEST1_DEFAULT;
|
|
|
|
dev_set_drvdata(&nsim_bus_dev->dev, nsim_dev);
|
|
|
|
err = nsim_dev_resources_register(devlink);
|
|
if (err)
|
|
goto err_devlink_free;
|
|
|
|
nsim_dev->fib_data = nsim_fib_create(devlink, NULL);
|
|
if (IS_ERR(nsim_dev->fib_data)) {
|
|
err = PTR_ERR(nsim_dev->fib_data);
|
|
goto err_resources_unregister;
|
|
}
|
|
|
|
err = devlink_register(devlink, &nsim_bus_dev->dev);
|
|
if (err)
|
|
goto err_fib_destroy;
|
|
|
|
err = devlink_params_register(devlink, nsim_devlink_params,
|
|
ARRAY_SIZE(nsim_devlink_params));
|
|
if (err)
|
|
goto err_dl_unregister;
|
|
nsim_devlink_set_params_init_values(nsim_dev, devlink);
|
|
|
|
err = nsim_dev_dummy_region_init(nsim_dev, devlink);
|
|
if (err)
|
|
goto err_params_unregister;
|
|
|
|
err = nsim_dev_traps_init(devlink);
|
|
if (err)
|
|
goto err_dummy_region_exit;
|
|
|
|
err = nsim_dev_debugfs_init(nsim_dev);
|
|
if (err)
|
|
goto err_traps_exit;
|
|
|
|
err = nsim_dev_health_init(nsim_dev, devlink);
|
|
if (err)
|
|
goto err_debugfs_exit;
|
|
|
|
err = nsim_bpf_dev_init(nsim_dev);
|
|
if (err)
|
|
goto err_health_exit;
|
|
|
|
err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count);
|
|
if (err)
|
|
goto err_bpf_dev_exit;
|
|
|
|
devlink_params_publish(devlink);
|
|
devlink_reload_enable(devlink);
|
|
return 0;
|
|
|
|
err_bpf_dev_exit:
|
|
nsim_bpf_dev_exit(nsim_dev);
|
|
err_health_exit:
|
|
nsim_dev_health_exit(nsim_dev);
|
|
err_debugfs_exit:
|
|
nsim_dev_debugfs_exit(nsim_dev);
|
|
err_traps_exit:
|
|
nsim_dev_traps_exit(devlink);
|
|
err_dummy_region_exit:
|
|
nsim_dev_dummy_region_exit(nsim_dev);
|
|
err_params_unregister:
|
|
devlink_params_unregister(devlink, nsim_devlink_params,
|
|
ARRAY_SIZE(nsim_devlink_params));
|
|
err_dl_unregister:
|
|
devlink_unregister(devlink);
|
|
err_fib_destroy:
|
|
nsim_fib_destroy(devlink, nsim_dev->fib_data);
|
|
err_resources_unregister:
|
|
devlink_resources_unregister(devlink, NULL);
|
|
err_devlink_free:
|
|
devlink_free(devlink);
|
|
return err;
|
|
}
|
|
|
|
static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev)
|
|
{
|
|
struct devlink *devlink = priv_to_devlink(nsim_dev);
|
|
|
|
if (devlink_is_reload_failed(devlink))
|
|
return;
|
|
debugfs_remove(nsim_dev->take_snapshot);
|
|
nsim_dev_port_del_all(nsim_dev);
|
|
nsim_dev_health_exit(nsim_dev);
|
|
nsim_dev_traps_exit(devlink);
|
|
nsim_dev_dummy_region_exit(nsim_dev);
|
|
mutex_destroy(&nsim_dev->port_list_lock);
|
|
nsim_fib_destroy(devlink, nsim_dev->fib_data);
|
|
}
|
|
|
|
void nsim_dev_remove(struct nsim_bus_dev *nsim_bus_dev)
|
|
{
|
|
struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
|
|
struct devlink *devlink = priv_to_devlink(nsim_dev);
|
|
|
|
devlink_reload_disable(devlink);
|
|
|
|
nsim_dev_reload_destroy(nsim_dev);
|
|
|
|
nsim_bpf_dev_exit(nsim_dev);
|
|
nsim_dev_debugfs_exit(nsim_dev);
|
|
devlink_params_unregister(devlink, nsim_devlink_params,
|
|
ARRAY_SIZE(nsim_devlink_params));
|
|
devlink_unregister(devlink);
|
|
devlink_resources_unregister(devlink, NULL);
|
|
devlink_free(devlink);
|
|
}
|
|
|
|
static struct nsim_dev_port *
|
|
__nsim_dev_port_lookup(struct nsim_dev *nsim_dev, unsigned int port_index)
|
|
{
|
|
struct nsim_dev_port *nsim_dev_port;
|
|
|
|
list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list)
|
|
if (nsim_dev_port->port_index == port_index)
|
|
return nsim_dev_port;
|
|
return NULL;
|
|
}
|
|
|
|
int nsim_dev_port_add(struct nsim_bus_dev *nsim_bus_dev,
|
|
unsigned int port_index)
|
|
{
|
|
struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
|
|
int err;
|
|
|
|
mutex_lock(&nsim_dev->port_list_lock);
|
|
if (__nsim_dev_port_lookup(nsim_dev, port_index))
|
|
err = -EEXIST;
|
|
else
|
|
err = __nsim_dev_port_add(nsim_dev, port_index);
|
|
mutex_unlock(&nsim_dev->port_list_lock);
|
|
return err;
|
|
}
|
|
|
|
int nsim_dev_port_del(struct nsim_bus_dev *nsim_bus_dev,
|
|
unsigned int port_index)
|
|
{
|
|
struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
|
|
struct nsim_dev_port *nsim_dev_port;
|
|
int err = 0;
|
|
|
|
mutex_lock(&nsim_dev->port_list_lock);
|
|
nsim_dev_port = __nsim_dev_port_lookup(nsim_dev, port_index);
|
|
if (!nsim_dev_port)
|
|
err = -ENOENT;
|
|
else
|
|
__nsim_dev_port_del(nsim_dev_port);
|
|
mutex_unlock(&nsim_dev->port_list_lock);
|
|
return err;
|
|
}
|
|
|
|
int nsim_dev_init(void)
|
|
{
|
|
nsim_dev_ddir = debugfs_create_dir(DRV_NAME, NULL);
|
|
return PTR_ERR_OR_ZERO(nsim_dev_ddir);
|
|
}
|
|
|
|
void nsim_dev_exit(void)
|
|
{
|
|
debugfs_remove_recursive(nsim_dev_ddir);
|
|
}
|