Commit | Line | Data |
---|---|---|
65178db4 BS |
1 | /* |
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 | ||
15 | struct nfsd_fault_inject_op { | |
16 | char *file; | |
17 | void (*func)(u64); | |
18 | }; | |
19 | ||
20 | static 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 | ||
43 | static long int NUM_INJECT_OPS = sizeof(inject_ops) / sizeof(struct nfsd_fault_inject_op); | |
44 | static struct dentry *debug_dir; | |
45 | ||
46 | static 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 | ||
59 | static int nfsd_inject_get(void *data, u64 *val) | |
60 | { | |
61 | return 0; | |
62 | } | |
63 | ||
64 | DEFINE_SIMPLE_ATTRIBUTE(fops_nfsd, nfsd_inject_get, nfsd_inject_set, "%llu\n"); | |
65 | ||
66 | void nfsd_fault_inject_cleanup(void) | |
67 | { | |
68 | debugfs_remove_recursive(debug_dir); | |
69 | } | |
70 | ||
71 | int nfsd_fault_inject_init(void) | |
72 | { | |
73 | unsigned int i; | |
74 | struct nfsd_fault_inject_op *op; | |
75 | mode_t mode = S_IFREG | S_IRUSR | S_IWUSR; | |
76 | ||
77 | debug_dir = debugfs_create_dir("nfsd", NULL); | |
78 | if (!debug_dir) | |
79 | goto fail; | |
80 | ||
81 | for (i = 0; i < NUM_INJECT_OPS; i++) { | |
82 | op = &inject_ops[i]; | |
83 | if (!debugfs_create_file(op->file, mode, debug_dir, op, &fops_nfsd)) | |
84 | goto fail; | |
85 | } | |
86 | return 0; | |
87 | ||
88 | fail: | |
89 | nfsd_fault_inject_cleanup(); | |
90 | return -ENOMEM; | |
91 | } |