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SUNRPC: Add a /sys/kernel/debug/fail_sunrpc/ directory

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This directory will contain a set of administrative controls for
enabling error injection for kernel RPC consumers.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever 2021-08-03 15:45:18 -04:00
parent 729580ddc5
commit c782af2500
3 changed files with 42 additions and 0 deletions
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7
lib/Kconfig.debug
View File

@ -1971,6 +1971,13 @@ config FAIL_MMC_REQUEST
and to test how the mmc host driver handles retries from
the block device.
config FAIL_SUNRPC
bool "Fault-injection capability for SunRPC"
depends on FAULT_INJECTION_DEBUG_FS && SUNRPC_DEBUG
help
Provide fault-injection capability for SunRPC and
its consumers.
config FAULT_INJECTION_STACKTRACE_FILTER
bool "stacktrace filter for fault-injection capabilities"
depends on FAULT_INJECTION_DEBUG_FS && STACKTRACE_SUPPORT

14
net/sunrpc/debugfs.c
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@ -8,7 +8,9 @@
#include <linux/debugfs.h>
#include <linux/sunrpc/sched.h>
#include <linux/sunrpc/clnt.h>
#include "netns.h"
#include "fail.h"
static struct dentry *topdir;
static struct dentry *rpc_clnt_dir;
@ -297,6 +299,13 @@ static const struct file_operations fault_disconnect_fops = {
.release = fault_release,
};
#if IS_ENABLED(CONFIG_FAIL_SUNRPC)
struct fail_sunrpc_attr fail_sunrpc = {
.attr = FAULT_ATTR_INITIALIZER,
};
EXPORT_SYMBOL_GPL(fail_sunrpc);
#endif
void __exit
sunrpc_debugfs_exit(void)
{
@ -321,4 +330,9 @@ sunrpc_debugfs_init(void)
debugfs_create_file("disconnect", S_IFREG | 0400, rpc_fault_dir, NULL,
&fault_disconnect_fops);
#if IS_ENABLED(CONFIG_FAIL_SUNRPC)
fault_create_debugfs_attr("fail_sunrpc", NULL,
&fail_sunrpc.attr);
#endif
}

21
net/sunrpc/fail.h Normal file
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@ -0,0 +1,21 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2021, Oracle. All rights reserved.
*/
#ifndef _NET_SUNRPC_FAIL_H_
#define _NET_SUNRPC_FAIL_H_
#include <linux/fault-inject.h>
#if IS_ENABLED(CONFIG_FAULT_INJECTION)
struct fail_sunrpc_attr {
struct fault_attr attr;
};
extern struct fail_sunrpc_attr fail_sunrpc;
#endif /* CONFIG_FAULT_INJECTION */
#endif /* _NET_SUNRPC_FAIL_H_ */