Move block drivers into their own directory

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 0 insertions, 275 deletions

diff --git a/block-cow.c b/block-cow.c
deleted file mode 100644
index 94b3549389..0000000000
--- a/block-cow.c
+++ /dev/null
@@ -1,275 +0,0 @@
-/*
- * Block driver for the COW format
- *
- * Copyright (c) 2004 Fabrice Bellard
- *
- * 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.
- */
-#ifndef _WIN32
-#include "qemu-common.h"
-#include "block_int.h"
-#include "module.h"
-#include <sys/mman.h>
-
-/**************************************************************/
-/* COW block driver using file system holes */
-
-/* user mode linux compatible COW file */
-#define COW_MAGIC 0x4f4f4f4d  /* MOOO */
-#define COW_VERSION 2
-
-struct cow_header_v2 {
-    uint32_t magic;
-    uint32_t version;
-    char backing_file[1024];
-    int32_t mtime;
-    uint64_t size;
-    uint32_t sectorsize;
-};
-
-typedef struct BDRVCowState {
-    int fd;
-    uint8_t *cow_bitmap; /* if non NULL, COW mappings are used first */
-    uint8_t *cow_bitmap_addr; /* mmap address of cow_bitmap */
-    int cow_bitmap_size;
-    int64_t cow_sectors_offset;
-} BDRVCowState;
-
-static int cow_probe(const uint8_t *buf, int buf_size, const char *filename)
-{
-    const struct cow_header_v2 *cow_header = (const void *)buf;
-
-    if (buf_size >= sizeof(struct cow_header_v2) &&
-        be32_to_cpu(cow_header->magic) == COW_MAGIC &&
-        be32_to_cpu(cow_header->version) == COW_VERSION)
-        return 100;
-    else
-        return 0;
-}
-
-static int cow_open(BlockDriverState *bs, const char *filename, int flags)
-{
-    BDRVCowState *s = bs->opaque;
-    int fd;
-    struct cow_header_v2 cow_header;
-    int64_t size;
-
-    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;
-    }
-    s->fd = fd;
-    /* see if it is a cow image */
-    if (read(fd, &cow_header, sizeof(cow_header)) != sizeof(cow_header)) {
-        goto fail;
-    }
-
-    if (be32_to_cpu(cow_header.magic) != COW_MAGIC ||
-        be32_to_cpu(cow_header.version) != COW_VERSION) {
-        goto fail;
-    }
-
-    /* cow image found */
-    size = be64_to_cpu(cow_header.size);
-    bs->total_sectors = size / 512;
-
-    pstrcpy(bs->backing_file, sizeof(bs->backing_file),
-            cow_header.backing_file);
-
-    /* mmap the bitmap */
-    s->cow_bitmap_size = ((bs->total_sectors + 7) >> 3) + sizeof(cow_header);
-    s->cow_bitmap_addr = (void *)mmap(get_mmap_addr(s->cow_bitmap_size),
-                                      s->cow_bitmap_size,
-                                      PROT_READ | PROT_WRITE,
-                                      MAP_SHARED, s->fd, 0);
-    if (s->cow_bitmap_addr == MAP_FAILED)
-        goto fail;
-    s->cow_bitmap = s->cow_bitmap_addr + sizeof(cow_header);
-    s->cow_sectors_offset = (s->cow_bitmap_size + 511) & ~511;
-    return 0;
- fail:
-    close(fd);
-    return -1;
-}
-
-static inline void cow_set_bit(uint8_t *bitmap, int64_t bitnum)
-{
-    bitmap[bitnum / 8] |= (1 << (bitnum%8));
-}
-
-static inline int is_bit_set(const uint8_t *bitmap, int64_t bitnum)
-{
-    return !!(bitmap[bitnum / 8] & (1 << (bitnum%8)));
-}
-
-
-/* Return true if first block has been changed (ie. current version is
- * in COW file).  Set the number of continuous blocks for which that
- * is true. */
-static inline int is_changed(uint8_t *bitmap,
-                             int64_t sector_num, int nb_sectors,
-                             int *num_same)
-{
-    int changed;
-
-    if (!bitmap || nb_sectors == 0) {
-	*num_same = nb_sectors;
-	return 0;
-    }
-
-    changed = is_bit_set(bitmap, sector_num);
-    for (*num_same = 1; *num_same < nb_sectors; (*num_same)++) {
-	if (is_bit_set(bitmap, sector_num + *num_same) != changed)
-	    break;
-    }
-
-    return changed;
-}
-
-static int cow_is_allocated(BlockDriverState *bs, int64_t sector_num,
-                            int nb_sectors, int *pnum)
-{
-    BDRVCowState *s = bs->opaque;
-    return is_changed(s->cow_bitmap, sector_num, nb_sectors, pnum);
-}
-
-static int cow_read(BlockDriverState *bs, int64_t sector_num,
-                    uint8_t *buf, int nb_sectors)
-{
-    BDRVCowState *s = bs->opaque;
-    int ret, n;
-
-    while (nb_sectors > 0) {
-        if (is_changed(s->cow_bitmap, sector_num, nb_sectors, &n)) {
-            lseek(s->fd, s->cow_sectors_offset + sector_num * 512, SEEK_SET);
-            ret = read(s->fd, buf, n * 512);
-            if (ret != n * 512)
-                return -1;
-        } else {
-            if (bs->backing_hd) {
-                /* read from the base image */
-                ret = bdrv_read(bs->backing_hd, sector_num, buf, n);
-                if (ret < 0)
-                    return -1;
-            } else {
-            memset(buf, 0, n * 512);
-        }
-        }
-        nb_sectors -= n;
-        sector_num += n;
-        buf += n * 512;
-    }
-    return 0;
-}
-
-static int cow_write(BlockDriverState *bs, int64_t sector_num,
-                     const uint8_t *buf, int nb_sectors)
-{
-    BDRVCowState *s = bs->opaque;
-    int ret, i;
-
-    lseek(s->fd, s->cow_sectors_offset + sector_num * 512, SEEK_SET);
-    ret = write(s->fd, buf, nb_sectors * 512);
-    if (ret != nb_sectors * 512)
-        return -1;
-    for (i = 0; i < nb_sectors; i++)
-        cow_set_bit(s->cow_bitmap, sector_num + i);
-    return 0;
-}
-
-static void cow_close(BlockDriverState *bs)
-{
-    BDRVCowState *s = bs->opaque;
-    munmap((void *)s->cow_bitmap_addr, s->cow_bitmap_size);
-    close(s->fd);
-}
-
-static int cow_create(const char *filename, int64_t image_sectors,
-                      const char *image_filename, int flags)
-{
-    int fd, cow_fd;
-    struct cow_header_v2 cow_header;
-    struct stat st;
-
-    if (flags)
-        return -ENOTSUP;
-
-    cow_fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
-              0644);
-    if (cow_fd < 0)
-        return -1;
-    memset(&cow_header, 0, sizeof(cow_header));
-    cow_header.magic = cpu_to_be32(COW_MAGIC);
-    cow_header.version = cpu_to_be32(COW_VERSION);
-    if (image_filename) {
-        /* Note: if no file, we put a dummy mtime */
-        cow_header.mtime = cpu_to_be32(0);
-
-        fd = open(image_filename, O_RDONLY | O_BINARY);
-        if (fd < 0) {
-            close(cow_fd);
-            goto mtime_fail;
-        }
-        if (fstat(fd, &st) != 0) {
-            close(fd);
-            goto mtime_fail;
-        }
-        close(fd);
-        cow_header.mtime = cpu_to_be32(st.st_mtime);
-    mtime_fail:
-        pstrcpy(cow_header.backing_file, sizeof(cow_header.backing_file),
-                image_filename);
-    }
-    cow_header.sectorsize = cpu_to_be32(512);
-    cow_header.size = cpu_to_be64(image_sectors * 512);
-    write(cow_fd, &cow_header, sizeof(cow_header));
-    /* resize to include at least all the bitmap */
-    ftruncate(cow_fd, sizeof(cow_header) + ((image_sectors + 7) >> 3));
-    close(cow_fd);
-    return 0;
-}
-
-static void cow_flush(BlockDriverState *bs)
-{
-    BDRVCowState *s = bs->opaque;
-    fsync(s->fd);
-}
-
-static BlockDriver bdrv_cow = {
-    .format_name	= "cow",
-    .instance_size	= sizeof(BDRVCowState),
-    .bdrv_probe		= cow_probe,
-    .bdrv_open		= cow_open,
-    .bdrv_read		= cow_read,
-    .bdrv_write		= cow_write,
-    .bdrv_close		= cow_close,
-    .bdrv_create	= cow_create,
-    .bdrv_flush		= cow_flush,
-    .bdrv_is_allocated	= cow_is_allocated,
-};
-
-static void bdrv_cow_init(void)
-{
-    bdrv_register(&bdrv_cow);
-}
-
-block_init(bdrv_cow_init);
-#endif