nfsd: Add a super simple flex file server
Have a simple flex file server where the mds (NFSv4.1 or NFSv4.2)
is also the ds (NFSv3). I.e., the metadata and the data file are
the exact same file.
This will allow testing of the flex file client.
Simply add the "pnfs" export option to your export
in /etc/exports and mount from a client that supports
flex files.
Signed-off-by: Tom Haynes <loghyr@primarydata.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/fs/nfsd/flexfilelayoutxdr.h b/fs/nfsd/flexfilelayoutxdr.h
new file mode 100644
index 0000000..467defd
--- /dev/null
+++ b/fs/nfsd/flexfilelayoutxdr.h
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2016 Tom Haynes <loghyr@primarydata.com>
+ */
+#ifndef _NFSD_FLEXFILELAYOUTXDR_H
+#define _NFSD_FLEXFILELAYOUTXDR_H 1
+
+#include <linux/inet.h>
+#include "xdr4.h"
+
+#define FF_FLAGS_NO_LAYOUTCOMMIT 1
+#define FF_FLAGS_NO_IO_THRU_MDS 2
+#define FF_FLAGS_NO_READ_IO 4
+
+struct xdr_stream;
+
+#define FF_NETID_LEN (4)
+#define FF_ADDR_LEN (INET6_ADDRSTRLEN + 8)
+struct pnfs_ff_netaddr {
+ char netid[FF_NETID_LEN + 1];
+ char addr[FF_ADDR_LEN + 1];
+ u32 netid_len;
+ u32 addr_len;
+};
+
+struct pnfs_ff_device_addr {
+ struct pnfs_ff_netaddr netaddr;
+ u32 version;
+ u32 minor_version;
+ u32 rsize;
+ u32 wsize;
+ bool tightly_coupled;
+};
+
+struct pnfs_ff_layout {
+ u32 flags;
+ u32 stats_collect_hint;
+ kuid_t uid;
+ kgid_t gid;
+ struct nfsd4_deviceid deviceid;
+ stateid_t stateid;
+ struct nfs_fh fh;
+};
+
+__be32 nfsd4_ff_encode_getdeviceinfo(struct xdr_stream *xdr,
+ struct nfsd4_getdeviceinfo *gdp);
+__be32 nfsd4_ff_encode_layoutget(struct xdr_stream *xdr,
+ struct nfsd4_layoutget *lgp);
+
+#endif /* _NFSD_FLEXFILELAYOUTXDR_H */
