1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2019 Mellanox Technologies. All rights reserved */
4 #include <linux/debugfs.h>
6 #include <linux/kernel.h>
7 #include <linux/slab.h>
12 nsim_dev_empty_reporter_dump(struct devlink_health_reporter *reporter,
13 struct devlink_fmsg *fmsg, void *priv_ctx,
14 struct netlink_ext_ack *extack)
20 nsim_dev_empty_reporter_diagnose(struct devlink_health_reporter *reporter,
21 struct devlink_fmsg *fmsg,
22 struct netlink_ext_ack *extack)
28 struct devlink_health_reporter_ops nsim_dev_empty_reporter_ops = {
30 .dump = nsim_dev_empty_reporter_dump,
31 .diagnose = nsim_dev_empty_reporter_diagnose,
34 struct nsim_dev_dummy_reporter_ctx {
39 nsim_dev_dummy_reporter_recover(struct devlink_health_reporter *reporter,
41 struct netlink_ext_ack *extack)
43 struct nsim_dev_health *health = devlink_health_reporter_priv(reporter);
44 struct nsim_dev_dummy_reporter_ctx *ctx = priv_ctx;
46 if (health->fail_recover) {
47 /* For testing purposes, user set debugfs fail_recover
48 * value to true. Fail right away.
50 NL_SET_ERR_MSG_MOD(extack, "User setup the recover to fail for testing purposes");
54 kfree(health->recovered_break_msg);
55 health->recovered_break_msg = kstrdup(ctx->break_msg,
57 if (!health->recovered_break_msg)
63 static int nsim_dev_dummy_fmsg_put(struct devlink_fmsg *fmsg, u32 binary_len)
68 devlink_fmsg_bool_pair_put(fmsg, "test_bool", true);
69 devlink_fmsg_u8_pair_put(fmsg, "test_u8", 1);
70 devlink_fmsg_u32_pair_put(fmsg, "test_u32", 3);
71 devlink_fmsg_u64_pair_put(fmsg, "test_u64", 4);
72 devlink_fmsg_string_pair_put(fmsg, "test_string", "somestring");
74 binary = kmalloc(binary_len, GFP_KERNEL | __GFP_NOWARN);
77 get_random_bytes(binary, binary_len);
78 devlink_fmsg_binary_pair_put(fmsg, "test_binary", binary, binary_len);
81 devlink_fmsg_pair_nest_start(fmsg, "test_nest");
82 devlink_fmsg_obj_nest_start(fmsg);
83 devlink_fmsg_bool_pair_put(fmsg, "nested_test_bool", false);
84 devlink_fmsg_u8_pair_put(fmsg, "nested_test_u8", false);
85 devlink_fmsg_obj_nest_end(fmsg);
86 devlink_fmsg_pair_nest_end(fmsg);
87 devlink_fmsg_arr_pair_nest_end(fmsg);
88 devlink_fmsg_arr_pair_nest_start(fmsg, "test_u32_array");
90 for (i = 0; i < 10; i++)
91 devlink_fmsg_u32_put(fmsg, i);
92 devlink_fmsg_arr_pair_nest_end(fmsg);
93 devlink_fmsg_arr_pair_nest_start(fmsg, "test_array_of_objects");
95 for (i = 0; i < 10; i++) {
96 devlink_fmsg_obj_nest_start(fmsg);
97 devlink_fmsg_bool_pair_put(fmsg, "in_array_nested_test_bool",
99 devlink_fmsg_u8_pair_put(fmsg, "in_array_nested_test_u8", i);
100 devlink_fmsg_obj_nest_end(fmsg);
102 devlink_fmsg_arr_pair_nest_end(fmsg);
108 nsim_dev_dummy_reporter_dump(struct devlink_health_reporter *reporter,
109 struct devlink_fmsg *fmsg, void *priv_ctx,
110 struct netlink_ext_ack *extack)
112 struct nsim_dev_health *health = devlink_health_reporter_priv(reporter);
113 struct nsim_dev_dummy_reporter_ctx *ctx = priv_ctx;
116 devlink_fmsg_string_pair_put(fmsg, "break_message", ctx->break_msg);
118 return nsim_dev_dummy_fmsg_put(fmsg, health->binary_len);
122 nsim_dev_dummy_reporter_diagnose(struct devlink_health_reporter *reporter,
123 struct devlink_fmsg *fmsg,
124 struct netlink_ext_ack *extack)
126 struct nsim_dev_health *health = devlink_health_reporter_priv(reporter);
128 if (health->recovered_break_msg)
129 devlink_fmsg_string_pair_put(fmsg, "recovered_break_message",
130 health->recovered_break_msg);
132 return nsim_dev_dummy_fmsg_put(fmsg, health->binary_len);
136 struct devlink_health_reporter_ops nsim_dev_dummy_reporter_ops = {
138 .recover = nsim_dev_dummy_reporter_recover,
139 .dump = nsim_dev_dummy_reporter_dump,
140 .diagnose = nsim_dev_dummy_reporter_diagnose,
143 static ssize_t nsim_dev_health_break_write(struct file *file,
144 const char __user *data,
145 size_t count, loff_t *ppos)
147 struct nsim_dev_health *health = file->private_data;
148 struct nsim_dev_dummy_reporter_ctx ctx;
152 break_msg = memdup_user_nul(data, count);
153 if (IS_ERR(break_msg))
154 return PTR_ERR(break_msg);
156 if (break_msg[count - 1] == '\n')
157 break_msg[count - 1] = '\0';
159 ctx.break_msg = break_msg;
160 err = devlink_health_report(health->dummy_reporter, break_msg, &ctx);
169 static const struct file_operations nsim_dev_health_break_fops = {
171 .write = nsim_dev_health_break_write,
172 .llseek = generic_file_llseek,
173 .owner = THIS_MODULE,
176 int nsim_dev_health_init(struct nsim_dev *nsim_dev, struct devlink *devlink)
178 struct nsim_dev_health *health = &nsim_dev->health;
181 health->empty_reporter =
182 devl_health_reporter_create(devlink,
183 &nsim_dev_empty_reporter_ops,
185 if (IS_ERR(health->empty_reporter))
186 return PTR_ERR(health->empty_reporter);
188 health->dummy_reporter =
189 devl_health_reporter_create(devlink,
190 &nsim_dev_dummy_reporter_ops,
192 if (IS_ERR(health->dummy_reporter)) {
193 err = PTR_ERR(health->dummy_reporter);
194 goto err_empty_reporter_destroy;
197 health->ddir = debugfs_create_dir("health", nsim_dev->ddir);
198 if (IS_ERR(health->ddir)) {
199 err = PTR_ERR(health->ddir);
200 goto err_dummy_reporter_destroy;
203 health->recovered_break_msg = NULL;
204 debugfs_create_file("break_health", 0200, health->ddir, health,
205 &nsim_dev_health_break_fops);
206 health->binary_len = 16;
207 debugfs_create_u32("binary_len", 0600, health->ddir,
208 &health->binary_len);
209 health->fail_recover = false;
210 debugfs_create_bool("fail_recover", 0600, health->ddir,
211 &health->fail_recover);
214 err_dummy_reporter_destroy:
215 devl_health_reporter_destroy(health->dummy_reporter);
216 err_empty_reporter_destroy:
217 devl_health_reporter_destroy(health->empty_reporter);
221 void nsim_dev_health_exit(struct nsim_dev *nsim_dev)
223 struct nsim_dev_health *health = &nsim_dev->health;
225 debugfs_remove_recursive(health->ddir);
226 kfree(health->recovered_break_msg);
227 devl_health_reporter_destroy(health->dummy_reporter);
228 devl_health_reporter_destroy(health->empty_reporter);