blob: e6c38159622fe6bc337f3d24ada7db683838ceac [file] [log] [blame]
Bryan Schumaker65178db2011-11-01 13:35:21 -04001/*
2 * Copyright (c) 2011 Bryan Schumaker <bjschuma@netapp.com>
3 *
4 * Uses debugfs to create fault injection points for client testing
5 */
6
7#include <linux/types.h>
8#include <linux/fs.h>
9#include <linux/debugfs.h>
10#include <linux/module.h>
11
12#include "state.h"
13#include "fault_inject.h"
14
15struct nfsd_fault_inject_op {
16 char *file;
17 void (*func)(u64);
18};
19
20static struct nfsd_fault_inject_op inject_ops[] = {
21 {
22 .file = "forget_clients",
23 .func = nfsd_forget_clients,
24 },
25 {
26 .file = "forget_locks",
27 .func = nfsd_forget_locks,
28 },
29 {
30 .file = "forget_openowners",
31 .func = nfsd_forget_openowners,
32 },
33 {
34 .file = "forget_delegations",
35 .func = nfsd_forget_delegations,
36 },
37 {
38 .file = "recall_delegations",
39 .func = nfsd_recall_delegations,
40 },
41};
42
43static long int NUM_INJECT_OPS = sizeof(inject_ops) / sizeof(struct nfsd_fault_inject_op);
44static struct dentry *debug_dir;
45
46static int nfsd_inject_set(void *op_ptr, u64 val)
47{
48 struct nfsd_fault_inject_op *op = op_ptr;
49
50 if (val == 0)
51 printk(KERN_INFO "NFSD Fault Injection: %s (all)", op->file);
52 else
53 printk(KERN_INFO "NFSD Fault Injection: %s (n = %llu)", op->file, val);
54
55 op->func(val);
56 return 0;
57}
58
59static int nfsd_inject_get(void *data, u64 *val)
60{
Weston Andros Adamson5fb35a32012-05-10 15:31:10 -040061 *val = 0;
Bryan Schumaker65178db2011-11-01 13:35:21 -040062 return 0;
63}
64
65DEFINE_SIMPLE_ATTRIBUTE(fops_nfsd, nfsd_inject_get, nfsd_inject_set, "%llu\n");
66
67void nfsd_fault_inject_cleanup(void)
68{
69 debugfs_remove_recursive(debug_dir);
70}
71
72int nfsd_fault_inject_init(void)
73{
74 unsigned int i;
75 struct nfsd_fault_inject_op *op;
Al Viro88187392012-03-20 06:00:24 -040076 umode_t mode = S_IFREG | S_IRUSR | S_IWUSR;
Bryan Schumaker65178db2011-11-01 13:35:21 -040077
78 debug_dir = debugfs_create_dir("nfsd", NULL);
79 if (!debug_dir)
80 goto fail;
81
82 for (i = 0; i < NUM_INJECT_OPS; i++) {
83 op = &inject_ops[i];
84 if (!debugfs_create_file(op->file, mode, debug_dir, op, &fops_nfsd))
85 goto fail;
86 }
87 return 0;
88
89fail:
90 nfsd_fault_inject_cleanup();
91 return -ENOMEM;
92}