qemu/roms/SLOF/lib/libvirtio/p9.h

   1 /******************************************************************************
   2  * Copyright (c) 2011 IBM Corporation
   3  * All rights reserved.
   4  * This program and the accompanying materials
   5  * are made available under the terms of the BSD License
   6  * which accompanies this distribution, and is available at
   7  * http://www.opensource.org/licenses/bsd-license.php
   8  *
   9  * Contributors:
  10  *     IBM Corporation - initial implementation
  11  *****************************************************************************/
  12
  13 #ifndef P9_H
  14 #define P9_H
  15
  16 #include <stdint.h>
  17
  18
  19 #define P9_ERROR                        -1
  20 #define P9_UNKNOWN_VERSION              -2
  21 #define P9_R_ERROR                      -3
  22 #define P9_MSG_TOO_LONG                 -4
  23 #define P9_UNEXPECTED_MSG               -5
  24 #define P9_UNEXPECTED_TAG               -6
  25 #define P9_TRANSPORT_ERROR              -7
  26 #define P9_NO_TRANSPORT                 -8
  27 #define P9_NULL_PATH                    -9
  28 #define P9_PATH_ELEMENT_TOO_LONG        -10
  29 #define P9_READ_UNEXPECTED_DATA         -11
  30 #define P9_NO_BUFFER                    -12
  31 #define P9_MSG_SIZE_TOO_BIG             -13
  32
  33 #define P9_PARTIAL_WALK                 1
  34
  35 typedef int (*p9_transact_t)(void *opaque, uint8_t *tx, int tx_size,
  36                 uint8_t *rx, int *rx_size);
  37
  38 typedef struct {
  39         uint32_t message_size;
  40         char *uname;            /* User name. */
  41         char *aname;            /* Tree/mount name/path. */
  42         uint32_t fid;           /* Represents mount point. */
  43 } p9_connection_t;
  44
  45 typedef struct {
  46         uint32_t fid;           /* Identifies the file to P9 server. */
  47         uint32_t iounit;        /* Maximum read size in bytes. */
  48         uint8_t type;           /* Type of file. */
  49         uint64_t length;        /* Length of file. */
  50         p9_connection_t *connection;
  51 } p9_file_t;
  52
  53
  54 void reset_buffers(void);
  55 void p9_reg_transport(p9_transact_t transact_func, void *opaque,
  56                       uint8_t *tx_buffer, uint8_t *rx_buffer);
  57 int p9_transaction(p9_connection_t *connection);
  58 int p9_version(p9_connection_t *connection);
  59 int p9_attach(p9_connection_t *connection);
  60 int p9_clunk(p9_connection_t *connection, uint32_t fid);
  61 int p9_walk(p9_connection_t *connection, uint32_t fid, uint32_t new_fid,
  62                 uint8_t **pos);
  63 int p9_open(p9_file_t *file, uint8_t mode);
  64 int p9_read(p9_file_t *file, uint8_t *buffer,
  65                 uint32_t count, uint64_t offset);
  66 int p9_stat(p9_file_t *file);
  67
  68 #endif