1 files changed, 79 insertions, 0 deletions
diff --git a/fs/nfsd/lockd.c b/fs/nfsd/lockd.c
new file mode 100644
index 000000000000..7b889ff15ae6
--- /dev/null
+++ b/fs/nfsd/lockd.c
@@ -0,0 +1,79 @@
+/*
+ * linux/fs/nfsd/lockd.c
+ *
+ * This file contains all the stubs needed when communicating with lockd.
+ * This level of indirection is necessary so we can run nfsd+lockd without
+ * requiring the nfs client to be compiled in/loaded, and vice versa.
+ *
+ * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
+ */
+
+#include <linux/types.h>
+#include <linux/fs.h>
+#include <linux/file.h>
+#include <linux/mount.h>
+#include <linux/sunrpc/clnt.h>
+#include <linux/sunrpc/svc.h>
+#include <linux/nfsd/nfsd.h>
+#include <linux/lockd/bind.h>
+
+#define NFSDDBG_FACILITY		NFSDDBG_LOCKD
+
+/*
+ * Note: we hold the dentry use count while the file is open.
+ */
+static u32
+nlm_fopen(struct svc_rqst *rqstp, struct nfs_fh *f, struct file **filp)
+{
+	u32		nfserr;
+	struct svc_fh	fh;
+
+	/* must initialize before using! but maxsize doesn't matter */
+	fh_init(&fh,0);
+	fh.fh_handle.fh_size = f->size;
+	memcpy((char*)&fh.fh_handle.fh_base, f->data, f->size);
+	fh.fh_export = NULL;
+
+	exp_readlock();
+	nfserr = nfsd_open(rqstp, &fh, S_IFREG, MAY_LOCK, filp);
+	fh_put(&fh);
+	rqstp->rq_client = NULL;
+	exp_readunlock();
+ 	/* nlm and nfsd don't share error codes.
+	 * we invent: 0 = no error
+	 *            1 = stale file handle
+	 *	      2 = other error
+	 */
+	switch (nfserr) {
+	case nfs_ok:
+		return 0;
+	case nfserr_stale:
+		return 1;
+	default:
+		return 2;
+	}
+}
+
+static void
+nlm_fclose(struct file *filp)
+{
+	fput(filp);
+}
+
+static struct nlmsvc_binding	nfsd_nlm_ops = {
+	.fopen		= nlm_fopen,		/* open file for locking */
+	.fclose		= nlm_fclose,		/* close file */
+};
+
+void
+nfsd_lockd_init(void)
+{
+	dprintk("nfsd: initializing lockd\n");
+	nlmsvc_ops = &nfsd_nlm_ops;
+}
+
+void
+nfsd_lockd_shutdown(void)
+{
+	nlmsvc_ops = NULL;
+}