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-rw-r--r--fs/nfsd/lockd.c79
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;
+}