284 lines
7.1 KiB
C
284 lines
7.1 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2019 Mellanox Technologies. All rights reserved */
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#include <linux/debugfs.h>
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#include <linux/err.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include "netdevsim.h"
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static int
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nsim_dev_empty_reporter_dump(struct devlink_health_reporter *reporter,
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struct devlink_fmsg *fmsg, void *priv_ctx,
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struct netlink_ext_ack *extack)
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{
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return 0;
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}
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static int
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nsim_dev_empty_reporter_diagnose(struct devlink_health_reporter *reporter,
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struct devlink_fmsg *fmsg,
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struct netlink_ext_ack *extack)
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{
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return 0;
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}
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static const
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struct devlink_health_reporter_ops nsim_dev_empty_reporter_ops = {
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.name = "empty",
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.dump = nsim_dev_empty_reporter_dump,
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.diagnose = nsim_dev_empty_reporter_diagnose,
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};
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struct nsim_dev_dummy_reporter_ctx {
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char *break_msg;
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};
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static int
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nsim_dev_dummy_reporter_recover(struct devlink_health_reporter *reporter,
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void *priv_ctx,
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struct netlink_ext_ack *extack)
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{
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struct nsim_dev_health *health = devlink_health_reporter_priv(reporter);
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struct nsim_dev_dummy_reporter_ctx *ctx = priv_ctx;
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if (health->fail_recover) {
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/* For testing purposes, user set debugfs fail_recover
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* value to true. Fail right away.
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*/
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NL_SET_ERR_MSG_MOD(extack, "User setup the recover to fail for testing purposes");
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return -EINVAL;
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}
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if (ctx) {
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kfree(health->recovered_break_msg);
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health->recovered_break_msg = kstrdup(ctx->break_msg,
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GFP_KERNEL);
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if (!health->recovered_break_msg)
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return -ENOMEM;
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}
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return 0;
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}
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static int nsim_dev_dummy_fmsg_put(struct devlink_fmsg *fmsg, u32 binary_len)
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{
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char *binary;
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int err;
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int i;
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err = devlink_fmsg_bool_pair_put(fmsg, "test_bool", true);
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if (err)
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return err;
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err = devlink_fmsg_u8_pair_put(fmsg, "test_u8", 1);
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if (err)
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return err;
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err = devlink_fmsg_u32_pair_put(fmsg, "test_u32", 3);
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if (err)
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return err;
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err = devlink_fmsg_u64_pair_put(fmsg, "test_u64", 4);
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if (err)
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return err;
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err = devlink_fmsg_string_pair_put(fmsg, "test_string", "somestring");
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if (err)
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return err;
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binary = kmalloc(binary_len, GFP_KERNEL | __GFP_NOWARN);
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if (!binary)
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return -ENOMEM;
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get_random_bytes(binary, binary_len);
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err = devlink_fmsg_binary_pair_put(fmsg, "test_binary", binary, binary_len);
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kfree(binary);
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if (err)
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return err;
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err = devlink_fmsg_pair_nest_start(fmsg, "test_nest");
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if (err)
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return err;
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err = devlink_fmsg_obj_nest_start(fmsg);
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if (err)
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return err;
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err = devlink_fmsg_bool_pair_put(fmsg, "nested_test_bool", false);
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if (err)
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return err;
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err = devlink_fmsg_u8_pair_put(fmsg, "nested_test_u8", false);
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if (err)
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return err;
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err = devlink_fmsg_obj_nest_end(fmsg);
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if (err)
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return err;
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err = devlink_fmsg_pair_nest_end(fmsg);
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if (err)
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return err;
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err = devlink_fmsg_arr_pair_nest_end(fmsg);
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if (err)
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return err;
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err = devlink_fmsg_arr_pair_nest_start(fmsg, "test_u32_array");
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if (err)
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return err;
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for (i = 0; i < 10; i++) {
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err = devlink_fmsg_u32_put(fmsg, i);
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if (err)
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return err;
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}
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err = devlink_fmsg_arr_pair_nest_end(fmsg);
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if (err)
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return err;
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err = devlink_fmsg_arr_pair_nest_start(fmsg, "test_array_of_objects");
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if (err)
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return err;
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for (i = 0; i < 10; i++) {
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err = devlink_fmsg_obj_nest_start(fmsg);
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if (err)
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return err;
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err = devlink_fmsg_bool_pair_put(fmsg,
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"in_array_nested_test_bool",
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false);
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if (err)
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return err;
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err = devlink_fmsg_u8_pair_put(fmsg,
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"in_array_nested_test_u8",
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i);
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if (err)
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return err;
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err = devlink_fmsg_obj_nest_end(fmsg);
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if (err)
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return err;
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}
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return devlink_fmsg_arr_pair_nest_end(fmsg);
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}
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static int
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nsim_dev_dummy_reporter_dump(struct devlink_health_reporter *reporter,
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struct devlink_fmsg *fmsg, void *priv_ctx,
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struct netlink_ext_ack *extack)
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{
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struct nsim_dev_health *health = devlink_health_reporter_priv(reporter);
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struct nsim_dev_dummy_reporter_ctx *ctx = priv_ctx;
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int err;
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if (ctx) {
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err = devlink_fmsg_string_pair_put(fmsg, "break_message",
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ctx->break_msg);
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if (err)
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return err;
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}
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return nsim_dev_dummy_fmsg_put(fmsg, health->binary_len);
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}
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static int
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nsim_dev_dummy_reporter_diagnose(struct devlink_health_reporter *reporter,
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struct devlink_fmsg *fmsg,
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struct netlink_ext_ack *extack)
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{
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struct nsim_dev_health *health = devlink_health_reporter_priv(reporter);
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int err;
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if (health->recovered_break_msg) {
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err = devlink_fmsg_string_pair_put(fmsg,
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"recovered_break_message",
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health->recovered_break_msg);
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if (err)
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return err;
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}
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return nsim_dev_dummy_fmsg_put(fmsg, health->binary_len);
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}
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static const
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struct devlink_health_reporter_ops nsim_dev_dummy_reporter_ops = {
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.name = "dummy",
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.recover = nsim_dev_dummy_reporter_recover,
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.dump = nsim_dev_dummy_reporter_dump,
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.diagnose = nsim_dev_dummy_reporter_diagnose,
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};
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static ssize_t nsim_dev_health_break_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_health *health = file->private_data;
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struct nsim_dev_dummy_reporter_ctx ctx;
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char *break_msg;
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int err;
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break_msg = memdup_user_nul(data, count);
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if (IS_ERR(break_msg))
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return PTR_ERR(break_msg);
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if (break_msg[count - 1] == '\n')
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break_msg[count - 1] = '\0';
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ctx.break_msg = break_msg;
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err = devlink_health_report(health->dummy_reporter, break_msg, &ctx);
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if (err)
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goto out;
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out:
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kfree(break_msg);
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return err ?: count;
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}
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static const struct file_operations nsim_dev_health_break_fops = {
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.open = simple_open,
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.write = nsim_dev_health_break_write,
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.llseek = generic_file_llseek,
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.owner = THIS_MODULE,
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};
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int nsim_dev_health_init(struct nsim_dev *nsim_dev, struct devlink *devlink)
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{
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struct nsim_dev_health *health = &nsim_dev->health;
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int err;
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health->empty_reporter =
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devlink_health_reporter_create(devlink,
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&nsim_dev_empty_reporter_ops,
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0, health);
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if (IS_ERR(health->empty_reporter))
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return PTR_ERR(health->empty_reporter);
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health->dummy_reporter =
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devlink_health_reporter_create(devlink,
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&nsim_dev_dummy_reporter_ops,
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0, health);
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if (IS_ERR(health->dummy_reporter)) {
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err = PTR_ERR(health->dummy_reporter);
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goto err_empty_reporter_destroy;
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}
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health->ddir = debugfs_create_dir("health", nsim_dev->ddir);
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if (IS_ERR(health->ddir)) {
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err = PTR_ERR(health->ddir);
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goto err_dummy_reporter_destroy;
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}
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health->recovered_break_msg = NULL;
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debugfs_create_file("break_health", 0200, health->ddir, health,
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&nsim_dev_health_break_fops);
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health->binary_len = 16;
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debugfs_create_u32("binary_len", 0600, health->ddir,
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&health->binary_len);
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health->fail_recover = false;
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debugfs_create_bool("fail_recover", 0600, health->ddir,
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&health->fail_recover);
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return 0;
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err_dummy_reporter_destroy:
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devlink_health_reporter_destroy(health->dummy_reporter);
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err_empty_reporter_destroy:
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devlink_health_reporter_destroy(health->empty_reporter);
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return err;
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}
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void nsim_dev_health_exit(struct nsim_dev *nsim_dev)
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{
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struct nsim_dev_health *health = &nsim_dev->health;
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debugfs_remove_recursive(health->ddir);
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kfree(health->recovered_break_msg);
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devlink_health_reporter_destroy(health->dummy_reporter);
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devlink_health_reporter_destroy(health->empty_reporter);
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}
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