1 files changed, 91 insertions, 0 deletions

diff --git a/fs/nfsd/fault_inject.c b/fs/nfsd/fault_inject.c
new file mode 100644
index 000000000000..ce7f0758d84c
--- /dev/null
+++ b/fs/nfsd/fault_inject.c
@@ -0,0 +1,91 @@
+/*
+ * 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;
+}