Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / fs / nfsd / blocklayoutxdr.h

diff --git a/kernel/fs/nfsd/blocklayoutxdr.h b/kernel/fs/nfsd/blocklayoutxdr.h
new file mode 100644 (file)
index 0000000..fdc7903
--- /dev/null
+++ b/kernel/fs/nfsd/blocklayoutxdr.h
@@ -0,0 +1,62 @@
+#ifndef _NFSD_BLOCKLAYOUTXDR_H
+#define _NFSD_BLOCKLAYOUTXDR_H 1
+
+#include <linux/blkdev.h>
+#include "xdr4.h"
+
+struct iomap;
+struct xdr_stream;
+
+enum pnfs_block_extent_state {
+       PNFS_BLOCK_READWRITE_DATA       = 0,
+       PNFS_BLOCK_READ_DATA            = 1,
+       PNFS_BLOCK_INVALID_DATA         = 2,
+       PNFS_BLOCK_NONE_DATA            = 3,
+};
+
+struct pnfs_block_extent {
+       struct nfsd4_deviceid           vol_id;
+       u64                             foff;
+       u64                             len;
+       u64                             soff;
+       enum pnfs_block_extent_state    es;
+};
+#define NFS4_BLOCK_EXTENT_SIZE         44
+
+enum pnfs_block_volume_type {
+       PNFS_BLOCK_VOLUME_SIMPLE        = 0,
+       PNFS_BLOCK_VOLUME_SLICE         = 1,
+       PNFS_BLOCK_VOLUME_CONCAT        = 2,
+       PNFS_BLOCK_VOLUME_STRIPE        = 3,
+};
+
+/*
+ * Random upper cap for the uuid length to avoid unbounded allocation.
+ * Not actually limited by the protocol.
+ */
+#define PNFS_BLOCK_UUID_LEN    128
+
+struct pnfs_block_volume {
+       enum pnfs_block_volume_type     type;
+       union {
+               struct {
+                       u64             offset;
+                       u32             sig_len;
+                       u8              sig[PNFS_BLOCK_UUID_LEN];
+               } simple;
+       };
+};
+
+struct pnfs_block_deviceaddr {
+       u32                             nr_volumes;
+       struct pnfs_block_volume        volumes[];
+};
+
+__be32 nfsd4_block_encode_getdeviceinfo(struct xdr_stream *xdr,
+               struct nfsd4_getdeviceinfo *gdp);
+__be32 nfsd4_block_encode_layoutget(struct xdr_stream *xdr,
+               struct nfsd4_layoutget *lgp);
+int nfsd4_block_decode_layoutupdate(__be32 *p, u32 len, struct iomap **iomapp,
+               u32 block_size);
+
+#endif /* _NFSD_BLOCKLAYOUTXDR_H */