Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / fs / zfs / dev.c

diff --git a/qemu/roms/u-boot/fs/zfs/dev.c b/qemu/roms/u-boot/fs/zfs/dev.c
new file mode 100644 (file)
index 0000000..3a1fa56
--- /dev/null
+++ b/qemu/roms/u-boot/fs/zfs/dev.c
@@ -0,0 +1,112 @@
+/*
+ *
+ *     based on code of fs/reiserfs/dev.c by
+ *
+ *     (C) Copyright 2003 - 2004
+ *     Sysgo AG, <www.elinos.com>, Pavel Bartusek <pba@sysgo.com>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+
+#include <common.h>
+#include <config.h>
+#include <zfs_common.h>
+
+static block_dev_desc_t *zfs_block_dev_desc;
+static disk_partition_t *part_info;
+
+void zfs_set_blk_dev(block_dev_desc_t *rbdd, disk_partition_t *info)
+{
+       zfs_block_dev_desc = rbdd;
+       part_info = info;
+}
+
+/* err */
+int zfs_devread(int sector, int byte_offset, int byte_len, char *buf)
+{
+       short sec_buffer[SECTOR_SIZE/sizeof(short)];
+       char *sec_buf = (char *)sec_buffer;
+       unsigned block_len;
+
+       /*
+        *      Check partition boundaries
+        */
+       if ((sector < 0) ||
+               ((sector + ((byte_offset + byte_len - 1) >> SECTOR_BITS)) >=
+                part_info->size)) {
+               /*              errnum = ERR_OUTSIDE_PART; */
+               printf(" ** zfs_devread() read outside partition sector %d\n", sector);
+               return 1;
+       }
+
+       /*
+        *      Get the read to the beginning of a partition.
+        */
+       sector += byte_offset >> SECTOR_BITS;
+       byte_offset &= SECTOR_SIZE - 1;
+
+       debug(" <%d, %d, %d>\n", sector, byte_offset, byte_len);
+
+       if (zfs_block_dev_desc == NULL) {
+               printf("** Invalid Block Device Descriptor (NULL)\n");
+               return 1;
+       }
+
+       if (byte_offset != 0) {
+               /* read first part which isn't aligned with start of sector */
+               if (zfs_block_dev_desc->block_read(zfs_block_dev_desc->dev,
+                       part_info->start + sector, 1,
+                       (unsigned long *)sec_buf) != 1) {
+                       printf(" ** zfs_devread() read error **\n");
+                       return 1;
+               }
+               memcpy(buf, sec_buf + byte_offset,
+                          min(SECTOR_SIZE - byte_offset, byte_len));
+               buf += min(SECTOR_SIZE - byte_offset, byte_len);
+               byte_len -= min(SECTOR_SIZE - byte_offset, byte_len);
+               sector++;
+       }
+
+       if (byte_len == 0)
+               return 0;
+
+       /*      read sector aligned part */
+       block_len = byte_len & ~(SECTOR_SIZE - 1);
+
+       if (block_len == 0) {
+               u8 p[SECTOR_SIZE];
+
+               block_len = SECTOR_SIZE;
+               zfs_block_dev_desc->block_read(zfs_block_dev_desc->dev,
+                       part_info->start + sector,
+                       1, (unsigned long *)p);
+               memcpy(buf, p, byte_len);
+               return 0;
+       }
+
+       if (zfs_block_dev_desc->block_read(zfs_block_dev_desc->dev,
+               part_info->start + sector, block_len / SECTOR_SIZE,
+               (unsigned long *) buf) != block_len / SECTOR_SIZE) {
+               printf(" ** zfs_devread() read error - block\n");
+               return 1;
+       }
+
+       block_len = byte_len & ~(SECTOR_SIZE - 1);
+       buf += block_len;
+       byte_len -= block_len;
+       sector += block_len / SECTOR_SIZE;
+
+       if (byte_len != 0) {
+               /* read rest of data which are not in whole sector */
+               if (zfs_block_dev_desc->
+                       block_read(zfs_block_dev_desc->dev,
+                                          part_info->start + sector, 1,
+                                          (unsigned long *) sec_buf) != 1) {
+                       printf(" ** zfs_devread() read error - last part\n");
+                       return 1;
+               }
+               memcpy(buf, sec_buf, byte_len);
+       }
+       return 0;
+}