nfsd41: split out share_access want and signal flags while decoding
[linux-2.6.git] / fs / nfsd / fault_inject.c
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 }