include/zfs_common.h

   1 /*
   2  * ZFS filesystem port for Uboot by
   3  * Jorgen Lundman <lundman at lundman.net>
   4  *
   5  * zfsfs support
   6  * made from existing GRUB Sources by Sun, GNU and others.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  */
  21
  22 #ifndef __ZFS_COMMON__
  23 #define __ZFS_COMMON__
  24
  25 #include <part.h>
  26
  27 #define SECTOR_SIZE                     0x200
  28 #define SECTOR_BITS                     9
  29
  30 typedef enum zfs_endian {
  31         UNKNOWN_ENDIAN = -2,
  32         LITTLE_ENDIAN = -1,
  33         BIG_ENDIAN = 0
  34 } zfs_endian_t;
  35
  36 /* Endian macros. */
  37 #define zfs_to_cpu16(x, a) (((a) == BIG_ENDIAN) ? be16_to_cpu(x) \
  38                                                                 : le16_to_cpu(x))
  39 #define cpu_to_zfs16(x, a) (((a) == BIG_ENDIAN) ? cpu_to_be16(x) \
  40                                                                 : cpu_to_le16(x))
  41
  42 #define zfs_to_cpu32(x, a) (((a) == BIG_ENDIAN) ? be32_to_cpu(x) \
  43                                                                 : le32_to_cpu(x))
  44 #define cpu_to_zfs32(x, a) (((a) == BIG_ENDIAN) ? cpu_to_be32(x) \
  45                                                                 : cpu_to_le32(x))
  46
  47 #define zfs_to_cpu64(x, a) (((a) == BIG_ENDIAN) ? be64_to_cpu(x) \
  48                                                                 : le64_to_cpu(x))
  49 #define cpu_to_zfs64(x, a) (((a) == BIG_ENDIAN) ? cpu_to_be64(x) \
  50                                                                 : cpu_to_le64(x))
  51
  52 enum zfs_errors {
  53         ZFS_ERR_NONE = 0,
  54         ZFS_ERR_NOT_IMPLEMENTED_YET = -1,
  55         ZFS_ERR_BAD_FS = -2,
  56         ZFS_ERR_OUT_OF_MEMORY = -3,
  57         ZFS_ERR_FILE_NOT_FOUND = -4,
  58         ZFS_ERR_BAD_FILE_TYPE = -5,
  59         ZFS_ERR_OUT_OF_RANGE = -6,
  60 };
  61
  62 struct zfs_filesystem {
  63
  64         /* Block Device Descriptor */
  65         struct blk_desc *dev_desc;
  66 };
  67
  68 struct device_s {
  69         uint64_t part_length;
  70 };
  71 typedef struct device_s *device_t;
  72
  73 struct zfs_file {
  74         device_t device;
  75         uint64_t size;
  76         void *data;
  77         uint64_t offset;
  78 };
  79
  80 typedef struct zfs_file *zfs_file_t;
  81
  82 struct zfs_dirhook_info {
  83         int dir;
  84         int mtimeset;
  85         time_t mtime;
  86         time_t mtime2;
  87 };
  88
  89 struct zfs_filesystem *zfsget_fs(void);
  90 int zfs_open(zfs_file_t, const char *filename);
  91 uint64_t zfs_read(zfs_file_t, char *buf, uint64_t len);
  92 struct zfs_data *zfs_mount(device_t);
  93 int zfs_close(zfs_file_t);
  94 int zfs_ls(device_t dev, const char *path,
  95                    int (*hook) (const char *, const struct zfs_dirhook_info *));
  96 int zfs_devread(int sector, int byte_offset, int byte_len, char *buf);
  97 void zfs_set_blk_dev(struct blk_desc *rbdd, struct disk_partition *info);
  98 void zfs_unmount(struct zfs_data *data);
  99 int lzjb_decompress(void *, void *, uint32_t, uint32_t);
 100 #endif