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 struct pnfs_block_range {
  19         u64                             foff;
  20         u64                             len;
  21 };
  22
  23 /*
  24  * Random upper cap for the uuid length to avoid unbounded allocation.
  25  * Not actually limited by the protocol.
  26  */
  27 #define PNFS_BLOCK_UUID_LEN     128
  28
  29 struct pnfs_block_volume {
  30         enum pnfs_block_volume_type     type;
  31         union {
  32                 struct {
  33                         u64             offset;
  34                         u32             sig_len;
  35                         u8              sig[PNFS_BLOCK_UUID_LEN];
  36                 } simple;
  37                 struct {
  38                         enum scsi_code_set              code_set;
  39                         enum scsi_designator_type       designator_type;
  40                         int                             designator_len;
  41                         u8                              designator[256];
  42                         u64                             pr_key;
  43                 } scsi;
  44         };
  45 };
  46
  47 struct pnfs_block_deviceaddr {
  48         u32                             nr_volumes;
  49         struct pnfs_block_volume        volumes[];
  50 };
  51
  52 __be32 nfsd4_block_encode_getdeviceinfo(struct xdr_stream *xdr,
  53                 struct nfsd4_getdeviceinfo *gdp);
  54 __be32 nfsd4_block_encode_layoutget(struct xdr_stream *xdr,
  55                 struct nfsd4_layoutget *lgp);
  56 int nfsd4_block_decode_layoutupdate(__be32 *p, u32 len, struct iomap **iomapp,
  57                 u32 block_size);
  58 int nfsd4_scsi_decode_layoutupdate(__be32 *p, u32 len, struct iomap **iomapp,
  59                 u32 block_size);
  60
  61 #endif /* _NFSD_BLOCKLAYOUTXDR_H */