92 строки
1.8 KiB
C
92 строки
1.8 KiB
C
/*
|
|
* Copyright (c) 2011 Bryan Schumaker <bjschuma@netapp.com>
|
|
*
|
|
* Uses debugfs to create fault injection points for client testing
|
|
*/
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/debugfs.h>
|
|
#include <linux/module.h>
|
|
|
|
#include "state.h"
|
|
#include "fault_inject.h"
|
|
|
|
struct nfsd_fault_inject_op {
|
|
char *file;
|
|
void (*func)(u64);
|
|
};
|
|
|
|
static struct nfsd_fault_inject_op inject_ops[] = {
|
|
{
|
|
.file = "forget_clients",
|
|
.func = nfsd_forget_clients,
|
|
},
|
|
{
|
|
.file = "forget_locks",
|
|
.func = nfsd_forget_locks,
|
|
},
|
|
{
|
|
.file = "forget_openowners",
|
|
.func = nfsd_forget_openowners,
|
|
},
|
|
{
|
|
.file = "forget_delegations",
|
|
.func = nfsd_forget_delegations,
|
|
},
|
|
{
|
|
.file = "recall_delegations",
|
|
.func = nfsd_recall_delegations,
|
|
},
|
|
};
|
|
|
|
static long int NUM_INJECT_OPS = sizeof(inject_ops) / sizeof(struct nfsd_fault_inject_op);
|
|
static struct dentry *debug_dir;
|
|
|
|
static int nfsd_inject_set(void *op_ptr, u64 val)
|
|
{
|
|
struct nfsd_fault_inject_op *op = op_ptr;
|
|
|
|
if (val == 0)
|
|
printk(KERN_INFO "NFSD Fault Injection: %s (all)", op->file);
|
|
else
|
|
printk(KERN_INFO "NFSD Fault Injection: %s (n = %llu)", op->file, val);
|
|
|
|
op->func(val);
|
|
return 0;
|
|
}
|
|
|
|
static int nfsd_inject_get(void *data, u64 *val)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
DEFINE_SIMPLE_ATTRIBUTE(fops_nfsd, nfsd_inject_get, nfsd_inject_set, "%llu\n");
|
|
|
|
void nfsd_fault_inject_cleanup(void)
|
|
{
|
|
debugfs_remove_recursive(debug_dir);
|
|
}
|
|
|
|
int nfsd_fault_inject_init(void)
|
|
{
|
|
unsigned int i;
|
|
struct nfsd_fault_inject_op *op;
|
|
mode_t mode = S_IFREG | S_IRUSR | S_IWUSR;
|
|
|
|
debug_dir = debugfs_create_dir("nfsd", NULL);
|
|
if (!debug_dir)
|
|
goto fail;
|
|
|
|
for (i = 0; i < NUM_INJECT_OPS; i++) {
|
|
op = &inject_ops[i];
|
|
if (!debugfs_create_file(op->file, mode, debug_dir, op, &fops_nfsd))
|
|
goto fail;
|
|
}
|
|
return 0;
|
|
|
|
fail:
|
|
nfsd_fault_inject_cleanup();
|
|
return -ENOMEM;
|
|
}
|