Move block drivers into their own directory

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

1 files changed, 0 insertions, 301 deletions

diff --git a/block-dmg.c b/block-dmg.c
deleted file mode 100644
index 262560ffd3..0000000000
--- a/block-dmg.c
+++ /dev/null
@@ -1,301 +0,0 @@
-/*
- * QEMU Block driver for DMG images
- *
- * Copyright (c) 2004 Johannes E. Schindelin
- *
- * 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 "bswap.h"
-#include "module.h"
-#include <zlib.h>
-
-typedef struct BDRVDMGState {
-    int fd;
-
-    /* each chunk contains a certain number of sectors,
-     * offsets[i] is the offset in the .dmg file,
-     * lengths[i] is the length of the compressed chunk,
-     * sectors[i] is the sector beginning at offsets[i],
-     * sectorcounts[i] is the number of sectors in that chunk,
-     * the sectors array is ordered
-     * 0<=i<n_chunks */
-
-    uint32_t n_chunks;
-    uint32_t* types;
-    uint64_t* offsets;
-    uint64_t* lengths;
-    uint64_t* sectors;
-    uint64_t* sectorcounts;
-    uint32_t current_chunk;
-    uint8_t *compressed_chunk;
-    uint8_t *uncompressed_chunk;
-    z_stream zstream;
-} BDRVDMGState;
-
-static int dmg_probe(const uint8_t *buf, int buf_size, const char *filename)
-{
-    int len=strlen(filename);
-    if(len>4 && !strcmp(filename+len-4,".dmg"))
-	return 2;
-    return 0;
-}
-
-static off_t read_off(int fd)
-{
-	uint64_t buffer;
-	if(read(fd,&buffer,8)<8)
-		return 0;
-	return be64_to_cpu(buffer);
-}
-
-static off_t read_uint32(int fd)
-{
-	uint32_t buffer;
-	if(read(fd,&buffer,4)<4)
-		return 0;
-	return be32_to_cpu(buffer);
-}
-
-static int dmg_open(BlockDriverState *bs, const char *filename, int flags)
-{
-    BDRVDMGState *s = bs->opaque;
-    off_t info_begin,info_end,last_in_offset,last_out_offset;
-    uint32_t count;
-    uint32_t max_compressed_size=1,max_sectors_per_chunk=1,i;
-
-    s->fd = open(filename, O_RDONLY | O_BINARY);
-    if (s->fd < 0)
-        return -errno;
-    bs->read_only = 1;
-    s->n_chunks = 0;
-    s->offsets = s->lengths = s->sectors = s->sectorcounts = NULL;
-
-    /* read offset of info blocks */
-    if(lseek(s->fd,-0x1d8,SEEK_END)<0) {
-dmg_close:
-	close(s->fd);
-	/* open raw instead */
-	bs->drv=bdrv_find_format("raw");
-	return bs->drv->bdrv_open(bs, filename, flags);
-    }
-    info_begin=read_off(s->fd);
-    if(info_begin==0)
-	goto dmg_close;
-    if(lseek(s->fd,info_begin,SEEK_SET)<0)
-	goto dmg_close;
-    if(read_uint32(s->fd)!=0x100)
-	goto dmg_close;
-    if((count = read_uint32(s->fd))==0)
-	goto dmg_close;
-    info_end = info_begin+count;
-    if(lseek(s->fd,0xf8,SEEK_CUR)<0)
-	goto dmg_close;
-
-    /* read offsets */
-    last_in_offset = last_out_offset = 0;
-    while(lseek(s->fd,0,SEEK_CUR)<info_end) {
-        uint32_t type;
-
-	count = read_uint32(s->fd);
-	if(count==0)
-	    goto dmg_close;
-	type = read_uint32(s->fd);
-	if(type!=0x6d697368 || count<244)
-	    lseek(s->fd,count-4,SEEK_CUR);
-	else {
-	    int new_size, chunk_count;
-	    if(lseek(s->fd,200,SEEK_CUR)<0)
-	        goto dmg_close;
-	    chunk_count = (count-204)/40;
-	    new_size = sizeof(uint64_t) * (s->n_chunks + chunk_count);
-	    s->types = qemu_realloc(s->types, new_size/2);
-	    s->offsets = qemu_realloc(s->offsets, new_size);
-	    s->lengths = qemu_realloc(s->lengths, new_size);
-	    s->sectors = qemu_realloc(s->sectors, new_size);
-	    s->sectorcounts = qemu_realloc(s->sectorcounts, new_size);
-
-	    for(i=s->n_chunks;i<s->n_chunks+chunk_count;i++) {
-		s->types[i] = read_uint32(s->fd);
-		if(s->types[i]!=0x80000005 && s->types[i]!=1 && s->types[i]!=2) {
-		    if(s->types[i]==0xffffffff) {
-			last_in_offset = s->offsets[i-1]+s->lengths[i-1];
-			last_out_offset = s->sectors[i-1]+s->sectorcounts[i-1];
-		    }
-		    chunk_count--;
-		    i--;
-		    if(lseek(s->fd,36,SEEK_CUR)<0)
-			goto dmg_close;
-		    continue;
-		}
-		read_uint32(s->fd);
-		s->sectors[i] = last_out_offset+read_off(s->fd);
-		s->sectorcounts[i] = read_off(s->fd);
-		s->offsets[i] = last_in_offset+read_off(s->fd);
-		s->lengths[i] = read_off(s->fd);
-		if(s->lengths[i]>max_compressed_size)
-		    max_compressed_size = s->lengths[i];
-		if(s->sectorcounts[i]>max_sectors_per_chunk)
-		    max_sectors_per_chunk = s->sectorcounts[i];
-	    }
-	    s->n_chunks+=chunk_count;
-	}
-    }
-
-    /* initialize zlib engine */
-    s->compressed_chunk = qemu_malloc(max_compressed_size+1);
-    s->uncompressed_chunk = qemu_malloc(512*max_sectors_per_chunk);
-    if(inflateInit(&s->zstream) != Z_OK)
-	goto dmg_close;
-
-    s->current_chunk = s->n_chunks;
-
-    return 0;
-}
-
-static inline int is_sector_in_chunk(BDRVDMGState* s,
-		uint32_t chunk_num,int sector_num)
-{
-    if(chunk_num>=s->n_chunks || s->sectors[chunk_num]>sector_num ||
-	    s->sectors[chunk_num]+s->sectorcounts[chunk_num]<=sector_num)
-	return 0;
-    else
-	return -1;
-}
-
-static inline uint32_t search_chunk(BDRVDMGState* s,int sector_num)
-{
-    /* binary search */
-    uint32_t chunk1=0,chunk2=s->n_chunks,chunk3;
-    while(chunk1!=chunk2) {
-	chunk3 = (chunk1+chunk2)/2;
-	if(s->sectors[chunk3]>sector_num)
-	    chunk2 = chunk3;
-	else if(s->sectors[chunk3]+s->sectorcounts[chunk3]>sector_num)
-	    return chunk3;
-	else
-	    chunk1 = chunk3;
-    }
-    return s->n_chunks; /* error */
-}
-
-static inline int dmg_read_chunk(BDRVDMGState *s,int sector_num)
-{
-    if(!is_sector_in_chunk(s,s->current_chunk,sector_num)) {
-	int ret;
-	uint32_t chunk = search_chunk(s,sector_num);
-
-	if(chunk>=s->n_chunks)
-	    return -1;
-
-	s->current_chunk = s->n_chunks;
-	switch(s->types[chunk]) {
-	case 0x80000005: { /* zlib compressed */
-	    int i;
-
-	    ret = lseek(s->fd, s->offsets[chunk], SEEK_SET);
-	    if(ret<0)
-		return -1;
-
-	    /* we need to buffer, because only the chunk as whole can be
-	     * inflated. */
-	    i=0;
-	    do {
-		ret = read(s->fd, s->compressed_chunk+i, s->lengths[chunk]-i);
-		if(ret<0 && errno==EINTR)
-		    ret=0;
-		i+=ret;
-	    } while(ret>=0 && ret+i<s->lengths[chunk]);
-
-	    if (ret != s->lengths[chunk])
-		return -1;
-
-	    s->zstream.next_in = s->compressed_chunk;
-	    s->zstream.avail_in = s->lengths[chunk];
-	    s->zstream.next_out = s->uncompressed_chunk;
-	    s->zstream.avail_out = 512*s->sectorcounts[chunk];
-	    ret = inflateReset(&s->zstream);
-	    if(ret != Z_OK)
-		return -1;
-	    ret = inflate(&s->zstream, Z_FINISH);
-	    if(ret != Z_STREAM_END || s->zstream.total_out != 512*s->sectorcounts[chunk])
-		return -1;
-	    break; }
-	case 1: /* copy */
-	    ret = read(s->fd, s->uncompressed_chunk, s->lengths[chunk]);
-	    if (ret != s->lengths[chunk])
-		return -1;
-	    break;
-	case 2: /* zero */
-	    memset(s->uncompressed_chunk, 0, 512*s->sectorcounts[chunk]);
-	    break;
-	}
-	s->current_chunk = chunk;
-    }
-    return 0;
-}
-
-static int dmg_read(BlockDriverState *bs, int64_t sector_num,
-                    uint8_t *buf, int nb_sectors)
-{
-    BDRVDMGState *s = bs->opaque;
-    int i;
-
-    for(i=0;i<nb_sectors;i++) {
-	uint32_t sector_offset_in_chunk;
-	if(dmg_read_chunk(s, sector_num+i) != 0)
-	    return -1;
-	sector_offset_in_chunk = sector_num+i-s->sectors[s->current_chunk];
-	memcpy(buf+i*512,s->uncompressed_chunk+sector_offset_in_chunk*512,512);
-    }
-    return 0;
-}
-
-static void dmg_close(BlockDriverState *bs)
-{
-    BDRVDMGState *s = bs->opaque;
-    close(s->fd);
-    if(s->n_chunks>0) {
-	free(s->types);
-	free(s->offsets);
-	free(s->lengths);
-	free(s->sectors);
-	free(s->sectorcounts);
-    }
-    free(s->compressed_chunk);
-    free(s->uncompressed_chunk);
-    inflateEnd(&s->zstream);
-}
-
-static BlockDriver bdrv_dmg = {
-    .format_name	= "dmg",
-    .instance_size	= sizeof(BDRVDMGState),
-    .bdrv_probe		= dmg_probe,
-    .bdrv_open		= dmg_open,
-    .bdrv_read		= dmg_read,
-    .bdrv_close		= dmg_close,
-};
-
-static void bdrv_dmg_init(void)
-{
-    bdrv_register(&bdrv_dmg);
-}
-
-block_init(bdrv_dmg_init);