Contributors: 11
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Branden Bonaby |
691 |
93.76% |
1 |
5.26% |
| Hank Janssen |
11 |
1.49% |
1 |
5.26% |
| Dexuan Cui |
9 |
1.22% |
2 |
10.53% |
| K. Y. Srinivasan |
9 |
1.22% |
5 |
26.32% |
| Greg Kroah-Hartman |
6 |
0.81% |
3 |
15.79% |
| Stephen Hemminger |
3 |
0.41% |
2 |
10.53% |
| Vitaly Kuznetsov |
3 |
0.41% |
1 |
5.26% |
| Nick Meier |
2 |
0.27% |
1 |
5.26% |
| Kimberly Brown |
1 |
0.14% |
1 |
5.26% |
| Thomas Gleixner |
1 |
0.14% |
1 |
5.26% |
| Yue haibing |
1 |
0.14% |
1 |
5.26% |
| Total |
737 |
|
19 |
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Authors:
* Branden Bonaby <brandonbonaby94@gmail.com>
*/
#include <linux/hyperv.h>
#include <linux/debugfs.h>
#include <linux/delay.h>
#include <linux/err.h>
#include "hyperv_vmbus.h"
static struct dentry *hv_debug_root;
static int hv_debugfs_delay_get(void *data, u64 *val)
{
*val = *(u32 *)data;
return 0;
}
static int hv_debugfs_delay_set(void *data, u64 val)
{
if (val > 1000)
return -EINVAL;
*(u32 *)data = val;
return 0;
}
DEFINE_DEBUGFS_ATTRIBUTE(hv_debugfs_delay_fops, hv_debugfs_delay_get,
hv_debugfs_delay_set, "%llu\n");
static int hv_debugfs_state_get(void *data, u64 *val)
{
*val = *(bool *)data;
return 0;
}
static int hv_debugfs_state_set(void *data, u64 val)
{
if (val == 1)
*(bool *)data = true;
else if (val == 0)
*(bool *)data = false;
else
return -EINVAL;
return 0;
}
DEFINE_DEBUGFS_ATTRIBUTE(hv_debugfs_state_fops, hv_debugfs_state_get,
hv_debugfs_state_set, "%llu\n");
/* Setup delay files to store test values */
static int hv_debug_delay_files(struct hv_device *dev, struct dentry *root)
{
struct vmbus_channel *channel = dev->channel;
char *buffer = "fuzz_test_buffer_interrupt_delay";
char *message = "fuzz_test_message_delay";
int *buffer_val = &channel->fuzz_testing_interrupt_delay;
int *message_val = &channel->fuzz_testing_message_delay;
struct dentry *buffer_file, *message_file;
buffer_file = debugfs_create_file(buffer, 0644, root,
buffer_val,
&hv_debugfs_delay_fops);
if (IS_ERR(buffer_file)) {
pr_debug("debugfs_hyperv: file %s not created\n", buffer);
return PTR_ERR(buffer_file);
}
message_file = debugfs_create_file(message, 0644, root,
message_val,
&hv_debugfs_delay_fops);
if (IS_ERR(message_file)) {
pr_debug("debugfs_hyperv: file %s not created\n", message);
return PTR_ERR(message_file);
}
return 0;
}
/* Setup test state value for vmbus device */
static int hv_debug_set_test_state(struct hv_device *dev, struct dentry *root)
{
struct vmbus_channel *channel = dev->channel;
bool *state = &channel->fuzz_testing_state;
char *status = "fuzz_test_state";
struct dentry *test_state;
test_state = debugfs_create_file(status, 0644, root,
state,
&hv_debugfs_state_fops);
if (IS_ERR(test_state)) {
pr_debug("debugfs_hyperv: file %s not created\n", status);
return PTR_ERR(test_state);
}
return 0;
}
/* Bind hv device to a dentry for debugfs */
static void hv_debug_set_dir_dentry(struct hv_device *dev, struct dentry *root)
{
if (hv_debug_root)
dev->debug_dir = root;
}
/* Create all test dentry's and names for fuzz testing */
int hv_debug_add_dev_dir(struct hv_device *dev)
{
const char *device = dev_name(&dev->device);
char *delay_name = "delay";
struct dentry *delay, *dev_root;
int ret;
if (!IS_ERR(hv_debug_root)) {
dev_root = debugfs_create_dir(device, hv_debug_root);
if (IS_ERR(dev_root)) {
pr_debug("debugfs_hyperv: hyperv/%s/ not created\n",
device);
return PTR_ERR(dev_root);
}
hv_debug_set_test_state(dev, dev_root);
hv_debug_set_dir_dentry(dev, dev_root);
delay = debugfs_create_dir(delay_name, dev_root);
if (IS_ERR(delay)) {
pr_debug("debugfs_hyperv: hyperv/%s/%s/ not created\n",
device, delay_name);
return PTR_ERR(delay);
}
ret = hv_debug_delay_files(dev, delay);
return ret;
}
pr_debug("debugfs_hyperv: hyperv/ not in root debugfs path\n");
return PTR_ERR(hv_debug_root);
}
/* Remove dentry associated with released hv device */
void hv_debug_rm_dev_dir(struct hv_device *dev)
{
if (!IS_ERR(hv_debug_root))
debugfs_remove_recursive(dev->debug_dir);
}
/* Remove all dentrys associated with vmbus testing */
void hv_debug_rm_all_dir(void)
{
debugfs_remove_recursive(hv_debug_root);
}
/* Delay buffer/message reads on a vmbus channel */
void hv_debug_delay_test(struct vmbus_channel *channel, enum delay delay_type)
{
struct vmbus_channel *test_channel = channel->primary_channel ?
channel->primary_channel :
channel;
bool state = test_channel->fuzz_testing_state;
if (state) {
if (delay_type == 0)
udelay(test_channel->fuzz_testing_interrupt_delay);
else
udelay(test_channel->fuzz_testing_message_delay);
}
}
/* Initialize top dentry for vmbus testing */
int hv_debug_init(void)
{
hv_debug_root = debugfs_create_dir("hyperv", NULL);
if (IS_ERR(hv_debug_root)) {
pr_debug("debugfs_hyperv: hyperv/ not created\n");
return PTR_ERR(hv_debug_root);
}
return 0;
}