aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--Makefile2
-rw-r--r--Makefile.target2
-rw-r--r--block-cloop.c167
-rw-r--r--block.c1
-rw-r--r--qemu-img.c4
-rw-r--r--vl.h1
6 files changed, 173 insertions, 4 deletions
diff --git a/Makefile b/Makefile
index 17ee449801..f80db8be9f 100644
--- a/Makefile
+++ b/Makefile
@@ -20,7 +20,7 @@ all: dyngen$(EXESUF) $(TOOLS) qemu-doc.html qemu-tech.html qemu.1
$(MAKE) -C $$d $@ || exit 1 ; \
done
-qemu-img: qemu-img.c block.c block-cow.c block-qcow.c aes.c block-vmdk.c
+qemu-img: qemu-img.c block.c block-cow.c block-qcow.c aes.c block-vmdk.c block-cloop.c
$(CC) -DQEMU_TOOL $(CFLAGS) $(LDFLAGS) $(DEFINES) -o $@ $^ -lz $(LIBS)
dyngen$(EXESUF): dyngen.c
diff --git a/Makefile.target b/Makefile.target
index 5ac50dc092..28585c7e94 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -241,7 +241,7 @@ endif
# must use static linking to avoid leaving stuff in virtual address space
VL_OBJS=vl.o osdep.o block.o readline.o monitor.o pci.o console.o
-VL_OBJS+=block-cow.o block-qcow.o aes.o block-vmdk.o
+VL_OBJS+=block-cow.o block-qcow.o aes.o block-vmdk.o block-cloop.o
ifeq ($(TARGET_ARCH), i386)
# Hardware support
diff --git a/block-cloop.c b/block-cloop.c
new file mode 100644
index 0000000000..f22253daaf
--- /dev/null
+++ b/block-cloop.c
@@ -0,0 +1,167 @@
+/*
+ * QEMU System Emulator block driver
+ *
+ * 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 "vl.h"
+#include "block_int.h"
+#include <zlib.h>
+
+typedef struct BDRVCloopState {
+ int fd;
+ uint32_t block_size;
+ uint32_t n_blocks;
+ uint64_t* offsets;
+ uint32_t sectors_per_block;
+ uint32_t current_block;
+ char* compressed_block;
+ char* uncompressed_block;
+ z_stream zstream;
+} BDRVCloopState;
+
+static int cloop_probe(const uint8_t *buf, int buf_size, const char *filename)
+{
+ const char* magic_version_2_0="#!/bin/sh\n"
+ "#V2.0 Format\n"
+ "modprobe cloop file=$0 && mount -r -t iso9660 /dev/cloop $1\n";
+ int length=strlen(magic_version_2_0);
+ if(length>buf_size)
+ length=buf_size;
+ if(!memcmp(magic_version_2_0,buf,length))
+ return 2;
+ return 0;
+}
+
+static int cloop_open(BlockDriverState *bs, const char *filename)
+{
+ BDRVCloopState *s = bs->opaque;
+ uint32_t offsets_size,max_compressed_block_size=1,i;
+
+ s->fd = open(filename, O_RDONLY | O_BINARY | O_LARGEFILE);
+ if (s->fd < 0)
+ return -1;
+ bs->read_only = 1;
+
+ /* read header */
+ if(lseek(s->fd,128,SEEK_SET)<0) {
+cloop_close:
+ close(s->fd);
+ return -1;
+ }
+ if(read(s->fd,&s->block_size,4)<4)
+ goto cloop_close;
+ s->block_size=be32_to_cpu(s->block_size);
+ if(read(s->fd,&s->n_blocks,4)<4)
+ goto cloop_close;
+ s->n_blocks=be32_to_cpu(s->n_blocks);
+
+ /* read offsets */
+ offsets_size=s->n_blocks*sizeof(uint64_t);
+ if(!(s->offsets=(uint64_t*)malloc(offsets_size)))
+ goto cloop_close;
+ if(read(s->fd,s->offsets,offsets_size)<offsets_size)
+ goto cloop_close;
+ for(i=0;i<s->n_blocks;i++) {
+ s->offsets[i]=be64_to_cpu(s->offsets[i]);
+ if(i>0) {
+ uint32_t size=s->offsets[i]-s->offsets[i-1];
+ if(size>max_compressed_block_size)
+ max_compressed_block_size=size;
+ }
+ }
+
+ /* initialize zlib engine */
+ if(!(s->compressed_block=(char*)malloc(max_compressed_block_size+1)))
+ goto cloop_close;
+ if(!(s->uncompressed_block=(char*)malloc(s->block_size)))
+ goto cloop_close;
+ if(inflateInit(&s->zstream) != Z_OK)
+ goto cloop_close;
+ s->current_block=s->n_blocks;
+
+ s->sectors_per_block = s->block_size/512;
+ bs->total_sectors = s->n_blocks*s->sectors_per_block;
+ return 0;
+}
+
+static inline int cloop_read_block(BDRVCloopState *s,int block_num)
+{
+ if(s->current_block != block_num) {
+ int ret;
+ uint32_t bytes = s->offsets[block_num+1]-s->offsets[block_num];
+
+ lseek(s->fd, s->offsets[block_num], SEEK_SET);
+ ret = read(s->fd, s->compressed_block, bytes);
+ if (ret != bytes)
+ return -1;
+
+ s->zstream.next_in = s->compressed_block;
+ s->zstream.avail_in = bytes;
+ s->zstream.next_out = s->uncompressed_block;
+ s->zstream.avail_out = s->block_size;
+ 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 != s->block_size)
+ return -1;
+
+ s->current_block = block_num;
+ }
+ return 0;
+}
+
+static int cloop_read(BlockDriverState *bs, int64_t sector_num,
+ uint8_t *buf, int nb_sectors)
+{
+ BDRVCloopState *s = bs->opaque;
+ int i;
+
+ for(i=0;i<nb_sectors;i++) {
+ uint32_t sector_offset_in_block=((sector_num+i)%s->sectors_per_block),
+ block_num=(sector_num+i)/s->sectors_per_block;
+ if(cloop_read_block(s, block_num) != 0)
+ return -1;
+ memcpy(buf+i*512,s->uncompressed_block+sector_offset_in_block*512,512);
+ }
+ return 0;
+}
+
+static void cloop_close(BlockDriverState *bs)
+{
+ BDRVCloopState *s = bs->opaque;
+ close(s->fd);
+ free(s->compressed_block);
+ free(s->uncompressed_block);
+ inflateEnd(&s->zstream);
+}
+
+BlockDriver bdrv_cloop = {
+ "cloop",
+ sizeof(BDRVCloopState),
+ cloop_probe,
+ cloop_open,
+ cloop_read,
+ NULL,
+ cloop_close,
+};
+
+
diff --git a/block.c b/block.c
index 389617cb4b..0e42b5e0d6 100644
--- a/block.c
+++ b/block.c
@@ -596,4 +596,5 @@ void bdrv_init(void)
#endif
bdrv_register(&bdrv_qcow);
bdrv_register(&bdrv_vmdk);
+ bdrv_register(&bdrv_cloop);
}
diff --git a/qemu-img.c b/qemu-img.c
index 5f83622358..196e0287f2 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -374,7 +374,7 @@ static int img_create(int argc, char **argv)
ret = bdrv_create(drv, filename, size / 512, base_filename, encrypted);
if (ret < 0) {
if (ret == -ENOTSUP) {
- error("Formatting or formatting option not suppored for file format '%s'", fmt);
+ error("Formatting or formatting option not supported for file format '%s'", fmt);
} else {
error("Error while formatting");
}
@@ -534,7 +534,7 @@ static int img_convert(int argc, char **argv)
ret = bdrv_create(drv, out_filename, total_sectors, NULL, encrypt);
if (ret < 0) {
if (ret == -ENOTSUP) {
- error("Formatting not suppored for file format '%s'", fmt);
+ error("Formatting not supported for file format '%s'", fmt);
} else {
error("Error while formatting '%s'", out_filename);
}
diff --git a/vl.h b/vl.h
index a8a70af5d4..4cfe9c0053 100644
--- a/vl.h
+++ b/vl.h
@@ -354,6 +354,7 @@ extern BlockDriver bdrv_raw;
extern BlockDriver bdrv_cow;
extern BlockDriver bdrv_qcow;
extern BlockDriver bdrv_vmdk;
+extern BlockDriver bdrv_cloop;
void bdrv_init(void);
BlockDriver *bdrv_find_format(const char *format_name);