diff options
author | Anthony Liguori <aliguori@us.ibm.com> | 2009-05-09 17:14:19 -0500 |
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committer | Anthony Liguori <aliguori@us.ibm.com> | 2009-05-14 16:13:46 -0500 |
commit | 019d6b8ff0d495ded6977f24a4e8fd1c7fec09e0 (patch) | |
tree | ffaf507f7440b5c7d8ed8a4de193b1df41e4a2d8 /block-parallels.c | |
parent | 5efa9d5a8b18841c9c62208a494d7f519238979a (diff) |
Move block drivers into their own directory
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'block-parallels.c')
-rw-r--r-- | block-parallels.c | 181 |
1 files changed, 0 insertions, 181 deletions
diff --git a/block-parallels.c b/block-parallels.c deleted file mode 100644 index 0b64a5c625..0000000000 --- a/block-parallels.c +++ /dev/null @@ -1,181 +0,0 @@ -/* - * Block driver for Parallels disk image format - * - * Copyright (c) 2007 Alex Beregszaszi - * - * This code is based on comparing different disk images created by Parallels. - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ -#include "qemu-common.h" -#include "block_int.h" -#include "module.h" - -/**************************************************************/ - -#define HEADER_MAGIC "WithoutFreeSpace" -#define HEADER_VERSION 2 -#define HEADER_SIZE 64 - -// always little-endian -struct parallels_header { - char magic[16]; // "WithoutFreeSpace" - uint32_t version; - uint32_t heads; - uint32_t cylinders; - uint32_t tracks; - uint32_t catalog_entries; - uint32_t nb_sectors; - char padding[24]; -} __attribute__((packed)); - -typedef struct BDRVParallelsState { - int fd; - - uint32_t *catalog_bitmap; - int catalog_size; - - int tracks; -} BDRVParallelsState; - -static int parallels_probe(const uint8_t *buf, int buf_size, const char *filename) -{ - const struct parallels_header *ph = (const void *)buf; - - if (buf_size < HEADER_SIZE) - return 0; - - if (!memcmp(ph->magic, HEADER_MAGIC, 16) && - (le32_to_cpu(ph->version) == HEADER_VERSION)) - return 100; - - return 0; -} - -static int parallels_open(BlockDriverState *bs, const char *filename, int flags) -{ - BDRVParallelsState *s = bs->opaque; - int fd, i; - struct parallels_header ph; - - fd = open(filename, O_RDWR | O_BINARY | O_LARGEFILE); - if (fd < 0) { - fd = open(filename, O_RDONLY | O_BINARY | O_LARGEFILE); - if (fd < 0) - return -1; - } - - bs->read_only = 1; // no write support yet - - s->fd = fd; - - if (read(fd, &ph, sizeof(ph)) != sizeof(ph)) - goto fail; - - if (memcmp(ph.magic, HEADER_MAGIC, 16) || - (le32_to_cpu(ph.version) != HEADER_VERSION)) { - goto fail; - } - - bs->total_sectors = le32_to_cpu(ph.nb_sectors); - - if (lseek(s->fd, 64, SEEK_SET) != 64) - goto fail; - - s->tracks = le32_to_cpu(ph.tracks); - - s->catalog_size = le32_to_cpu(ph.catalog_entries); - s->catalog_bitmap = qemu_malloc(s->catalog_size * 4); - if (read(s->fd, s->catalog_bitmap, s->catalog_size * 4) != - s->catalog_size * 4) - goto fail; - for (i = 0; i < s->catalog_size; i++) - le32_to_cpus(&s->catalog_bitmap[i]); - - return 0; -fail: - if (s->catalog_bitmap) - qemu_free(s->catalog_bitmap); - close(fd); - return -1; -} - -static inline int seek_to_sector(BlockDriverState *bs, int64_t sector_num) -{ - BDRVParallelsState *s = bs->opaque; - uint32_t index, offset, position; - - index = sector_num / s->tracks; - offset = sector_num % s->tracks; - - // not allocated - if ((index > s->catalog_size) || (s->catalog_bitmap[index] == 0)) - return -1; - - position = (s->catalog_bitmap[index] + offset) * 512; - -// fprintf(stderr, "sector: %llx index=%x offset=%x pointer=%x position=%x\n", -// sector_num, index, offset, s->catalog_bitmap[index], position); - - if (lseek(s->fd, position, SEEK_SET) != position) - return -1; - - return 0; -} - -static int parallels_read(BlockDriverState *bs, int64_t sector_num, - uint8_t *buf, int nb_sectors) -{ - BDRVParallelsState *s = bs->opaque; - - while (nb_sectors > 0) { - if (!seek_to_sector(bs, sector_num)) { - if (read(s->fd, buf, 512) != 512) - return -1; - } else - memset(buf, 0, 512); - nb_sectors--; - sector_num++; - buf += 512; - } - return 0; -} - -static void parallels_close(BlockDriverState *bs) -{ - BDRVParallelsState *s = bs->opaque; - qemu_free(s->catalog_bitmap); - close(s->fd); -} - -static BlockDriver bdrv_parallels = { - .format_name = "parallels", - .instance_size = sizeof(BDRVParallelsState), - .bdrv_probe = parallels_probe, - .bdrv_open = parallels_open, - .bdrv_read = parallels_read, - .bdrv_close = parallels_close, -}; - -static void bdrv_parallels_init(void) -{ - bdrv_register(&bdrv_parallels); -} - -block_init(bdrv_parallels_init); |