zfs: Add ZFS filesystem support

U-Boot port is based on sources forked from GRUB-0.97 by Sun in 2004,
which can be found here:
http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/grub/grub-0.97/stage2/zfs-include/zfs.h

Released by Sun for GRUB under the license:
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.

GRUB official releases include ZFS in version:
ftp://alpha.gnu.org/gnu/grub/grub-1.99~rc1.tar.gz

And patched against GRUB Bazaar repository for ashift fixes (4KB HDDs)
more conveniently found at github:
https://github.com/pendor/grub-zfs/commit/e7b6ef3ac3b9685ac4c394c897b1d4221b7381f1

Signed-off-by: Jorgen Lundman <lundman@lundman.net>

1 files changed, 109 insertions, 0 deletions

diff --git a/include/zfs_common.h b/include/zfs_common.h
new file mode 100644
index 0000000000..04e73d0cd2
--- /dev/null
+++ b/include/zfs_common.h
@@ -0,0 +1,109 @@
+/*
+ * ZFS filesystem port for Uboot by
+ * Jorgen Lundman <lundman at lundman.net>
+ *
+ * zfsfs support
+ * made from existing GRUB Sources by Sun, GNU and others.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef __ZFS_COMMON__
+#define __ZFS_COMMON__
+
+#define SECTOR_SIZE			0x200
+#define SECTOR_BITS			9
+
+
+typedef enum zfs_endian {
+	UNKNOWN_ENDIAN = -2,
+	LITTLE_ENDIAN = -1,
+	BIG_ENDIAN = 0
+} zfs_endian_t;
+
+
+/* Endian macros. */
+#define zfs_to_cpu16(x, a) (((a) == BIG_ENDIAN) ? be16_to_cpu(x) \
+								: le16_to_cpu(x))
+#define cpu_to_zfs16(x, a) (((a) == BIG_ENDIAN) ? cpu_to_be16(x) \
+								: cpu_to_le16(x))
+
+#define zfs_to_cpu32(x, a) (((a) == BIG_ENDIAN) ? be32_to_cpu(x) \
+								: le32_to_cpu(x))
+#define cpu_to_zfs32(x, a) (((a) == BIG_ENDIAN) ? cpu_to_be32(x) \
+								: cpu_to_le32(x))
+
+#define zfs_to_cpu64(x, a) (((a) == BIG_ENDIAN) ? be64_to_cpu(x) \
+								: le64_to_cpu(x))
+#define cpu_to_zfs64(x, a) (((a) == BIG_ENDIAN) ? cpu_to_be64(x) \
+								: cpu_to_le64(x))
+
+
+enum zfs_errors {
+	ZFS_ERR_NONE = 0,
+	ZFS_ERR_NOT_IMPLEMENTED_YET = -1,
+	ZFS_ERR_BAD_FS = -2,
+	ZFS_ERR_OUT_OF_MEMORY = -3,
+	ZFS_ERR_FILE_NOT_FOUND = -4,
+	ZFS_ERR_BAD_FILE_TYPE = -5,
+	ZFS_ERR_OUT_OF_RANGE = -6,
+};
+
+struct zfs_filesystem {
+
+	/* Block Device Descriptor */
+	block_dev_desc_t *dev_desc;
+};
+
+
+extern block_dev_desc_t *zfs_dev_desc;
+
+struct device_s {
+	uint64_t part_length;
+};
+typedef struct device_s *device_t;
+
+struct zfs_file {
+	device_t device;
+	uint64_t size;
+	void *data;
+	uint64_t offset;
+};
+
+typedef struct zfs_file *zfs_file_t;
+
+struct zfs_dirhook_info {
+	int dir;
+	int mtimeset;
+	time_t mtime;
+	time_t mtime2;
+};
+
+
+
+
+struct zfs_filesystem *zfsget_fs(void);
+int init_fs(block_dev_desc_t *dev_desc);
+void deinit_fs(block_dev_desc_t *dev_desc);
+int zfs_open(zfs_file_t, const char *filename);
+uint64_t zfs_read(zfs_file_t, char *buf, uint64_t len);
+struct zfs_data *zfs_mount(device_t);
+int zfs_close(zfs_file_t);
+int zfs_ls(device_t dev, const char *path,
+		   int (*hook) (const char *, const struct zfs_dirhook_info *));
+int zfs_devread(int sector, int byte_offset, int byte_len, char *buf);
+int zfs_set_blk_dev(block_dev_desc_t *rbdd, int part);
+void zfs_unmount(struct zfs_data *data);
+int lzjb_decompress(void *, void *, uint32_t, uint32_t);
+#endif