kernel/fs/nfsd/blocklayoutxdr.h

   1 #ifndef _NFSD_BLOCKLAYOUTXDR_H
   2 #define _NFSD_BLOCKLAYOUTXDR_H 1
   3
   4 #include <linux/blkdev.h>
   5 #include "xdr4.h"
   6
   7 struct iomap;
   8 struct xdr_stream;
   9
  10 struct pnfs_block_extent {
  11         struct nfsd4_deviceid           vol_id;
  12         u64                             foff;
  13         u64                             len;
  14         u64                             soff;
  15         enum pnfs_block_extent_state    es;
  16 };
  17
  18 /*
  19  * Random upper cap for the uuid length to avoid unbounded allocation.
  20  * Not actually limited by the protocol.
  21  */
  22 #define PNFS_BLOCK_UUID_LEN     128
  23
  24 struct pnfs_block_volume {
  25         enum pnfs_block_volume_type     type;
  26         union {
  27                 struct {
  28                         u64             offset;
  29                         u32             sig_len;
  30                         u8              sig[PNFS_BLOCK_UUID_LEN];
  31                 } simple;
  32         };
  33 };
  34
  35 struct pnfs_block_deviceaddr {
  36         u32                             nr_volumes;
  37         struct pnfs_block_volume        volumes[];
  38 };
  39
  40 __be32 nfsd4_block_encode_getdeviceinfo(struct xdr_stream *xdr,
  41                 struct nfsd4_getdeviceinfo *gdp);
  42 __be32 nfsd4_block_encode_layoutget(struct xdr_stream *xdr,
  43                 struct nfsd4_layoutget *lgp);
  44 int nfsd4_block_decode_layoutupdate(__be32 *p, u32 len, struct iomap **iomapp,
  45                 u32 block_size);
  46
  47 #endif /* _NFSD_BLOCKLAYOUTXDR_H */