* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
-#include "qemu-common.h"
+#include "qemu/osdep.h"
#include "block/block_int.h"
+#include "sysemu/block-backend.h"
#include "qemu/module.h"
#include <zlib.h>
#include "block/qcow2.h"
#include "qapi-event.h"
#include "trace.h"
#include "qemu/option_int.h"
+#include "qemu/cutils.h"
/*
Differences with QCOW:
}
}
-static void GCC_FMT_ATTR(3, 4) report_unsupported(BlockDriverState *bs,
- Error **errp, const char *fmt, ...)
-{
- char msg[64];
- va_list ap;
-
- va_start(ap, fmt);
- vsnprintf(msg, sizeof(msg), fmt, ap);
- va_end(ap);
-
- error_setg(errp, QERR_UNKNOWN_BLOCK_FORMAT_FEATURE,
- bdrv_get_device_or_node_name(bs), "qcow2", msg);
-}
-
-static void report_unsupported_feature(BlockDriverState *bs,
- Error **errp, Qcow2Feature *table, uint64_t mask)
+static void report_unsupported_feature(Error **errp, Qcow2Feature *table,
+ uint64_t mask)
{
char *features = g_strdup("");
char *old;
g_free(old);
}
- report_unsupported(bs, errp, "%s", features);
+ error_setg(errp, "Unsupported qcow2 feature(s): %s", features);
g_free(features);
}
goto fail;
}
if (header.version < 2 || header.version > 3) {
- report_unsupported(bs, errp, "QCOW version %" PRIu32, header.version);
+ error_setg(errp, "Unsupported qcow2 version %" PRIu32, header.version);
ret = -ENOTSUP;
goto fail;
}
void *feature_table = NULL;
qcow2_read_extensions(bs, header.header_length, ext_end,
&feature_table, NULL);
- report_unsupported_feature(bs, errp, feature_table,
+ report_unsupported_feature(errp, feature_table,
s->incompatible_features &
~QCOW2_INCOMPAT_MASK);
ret = -ENOTSUP;
}
s->crypt_method_header = header.crypt_method;
if (s->crypt_method_header) {
+ if (bdrv_uses_whitelist() &&
+ s->crypt_method_header == QCOW_CRYPT_AES) {
+ error_report("qcow2 built-in AES encryption is deprecated");
+ error_printf("Support for it will be removed in a future release.\n"
+ "You can use 'qemu-img convert' to switch to an\n"
+ "unencrypted qcow2 image, or a LUKS raw image.\n");
+ }
+
bs->encrypted = 1;
}
}
/* Clear unknown autoclear feature bits */
- if (!bs->read_only && !(flags & BDRV_O_INCOMING) && s->autoclear_features) {
+ if (!bs->read_only && !(flags & BDRV_O_INACTIVE) && s->autoclear_features) {
s->autoclear_features = 0;
ret = qcow2_update_header(bs);
if (ret < 0) {
qemu_co_mutex_init(&s->lock);
/* Repair image if dirty */
- if (!(flags & (BDRV_O_CHECK | BDRV_O_INCOMING)) && !bs->read_only &&
+ if (!(flags & (BDRV_O_CHECK | BDRV_O_INACTIVE)) && !bs->read_only &&
(s->incompatible_features & QCOW2_INCOMPAT_DIRTY)) {
BdrvCheckResult result = {0};
}
static int64_t coroutine_fn qcow2_co_get_block_status(BlockDriverState *bs,
- int64_t sector_num, int nb_sectors, int *pnum)
+ int64_t sector_num, int nb_sectors, int *pnum, BlockDriverState **file)
{
BDRVQcow2State *s = bs->opaque;
uint64_t cluster_offset;
!s->cipher) {
index_in_cluster = sector_num & (s->cluster_sectors - 1);
cluster_offset |= (index_in_cluster << BDRV_SECTOR_BITS);
+ *file = bs->file->bs;
status |= BDRV_BLOCK_OFFSET_VALID | cluster_offset;
}
if (ret == QCOW2_CLUSTER_ZERO) {
return ret;
}
+static int qcow2_inactivate(BlockDriverState *bs)
+{
+ BDRVQcow2State *s = bs->opaque;
+ int ret, result = 0;
+
+ ret = qcow2_cache_flush(bs, s->l2_table_cache);
+ if (ret) {
+ result = ret;
+ error_report("Failed to flush the L2 table cache: %s",
+ strerror(-ret));
+ }
+
+ ret = qcow2_cache_flush(bs, s->refcount_block_cache);
+ if (ret) {
+ result = ret;
+ error_report("Failed to flush the refcount block cache: %s",
+ strerror(-ret));
+ }
+
+ if (result == 0) {
+ qcow2_mark_clean(bs);
+ }
+
+ return result;
+}
+
static void qcow2_close(BlockDriverState *bs)
{
BDRVQcow2State *s = bs->opaque;
/* else pre-write overlap checks in cache_destroy may crash */
s->l1_table = NULL;
- if (!(bs->open_flags & BDRV_O_INCOMING)) {
- int ret1, ret2;
-
- ret1 = qcow2_cache_flush(bs, s->l2_table_cache);
- ret2 = qcow2_cache_flush(bs, s->refcount_block_cache);
-
- if (ret1) {
- error_report("Failed to flush the L2 table cache: %s",
- strerror(-ret1));
- }
- if (ret2) {
- error_report("Failed to flush the refcount block cache: %s",
- strerror(-ret2));
- }
-
- if (!ret1 && !ret2) {
- qcow2_mark_clean(bs);
- }
+ if (!(s->flags & BDRV_O_INACTIVE)) {
+ qcow2_inactivate(bs);
}
cache_clean_timer_del(bs);
bdrv_invalidate_cache(bs->file->bs, &local_err);
if (local_err) {
error_propagate(errp, local_err);
+ bs->drv = NULL;
return;
}
memset(s, 0, sizeof(BDRVQcow2State));
options = qdict_clone_shallow(bs->options);
+ flags &= ~BDRV_O_INACTIVE;
ret = qcow2_open(bs, options, flags, &local_err);
QDECREF(options);
if (local_err) {
- error_setg(errp, "Could not reopen qcow2 layer: %s",
- error_get_pretty(local_err));
- error_free(local_err);
+ error_propagate(errp, local_err);
+ error_prepend(errp, "Could not reopen qcow2 layer: ");
+ bs->drv = NULL;
return;
} else if (ret < 0) {
error_setg_errno(errp, -ret, "Could not reopen qcow2 layer");
+ bs->drv = NULL;
return;
}
}
/* Feature table */
- Qcow2Feature features[] = {
- {
- .type = QCOW2_FEAT_TYPE_INCOMPATIBLE,
- .bit = QCOW2_INCOMPAT_DIRTY_BITNR,
- .name = "dirty bit",
- },
- {
- .type = QCOW2_FEAT_TYPE_INCOMPATIBLE,
- .bit = QCOW2_INCOMPAT_CORRUPT_BITNR,
- .name = "corrupt bit",
- },
- {
- .type = QCOW2_FEAT_TYPE_COMPATIBLE,
- .bit = QCOW2_COMPAT_LAZY_REFCOUNTS_BITNR,
- .name = "lazy refcounts",
- },
- };
+ if (s->qcow_version >= 3) {
+ Qcow2Feature features[] = {
+ {
+ .type = QCOW2_FEAT_TYPE_INCOMPATIBLE,
+ .bit = QCOW2_INCOMPAT_DIRTY_BITNR,
+ .name = "dirty bit",
+ },
+ {
+ .type = QCOW2_FEAT_TYPE_INCOMPATIBLE,
+ .bit = QCOW2_INCOMPAT_CORRUPT_BITNR,
+ .name = "corrupt bit",
+ },
+ {
+ .type = QCOW2_FEAT_TYPE_COMPATIBLE,
+ .bit = QCOW2_COMPAT_LAZY_REFCOUNTS_BITNR,
+ .name = "lazy refcounts",
+ },
+ };
- ret = header_ext_add(buf, QCOW2_EXT_MAGIC_FEATURE_TABLE,
- features, sizeof(features), buflen);
- if (ret < 0) {
- goto fail;
+ ret = header_ext_add(buf, QCOW2_EXT_MAGIC_FEATURE_TABLE,
+ features, sizeof(features), buflen);
+ if (ret < 0) {
+ goto fail;
+ }
+ buf += ret;
+ buflen -= ret;
}
- buf += ret;
- buflen -= ret;
/* Keep unknown header extensions */
QLIST_FOREACH(uext, &s->unknown_header_ext, next) {
{
BDRVQcow2State *s = bs->opaque;
+ if (backing_file && strlen(backing_file) > 1023) {
+ return -EINVAL;
+ }
+
pstrcpy(bs->backing_file, sizeof(bs->backing_file), backing_file ?: "");
pstrcpy(bs->backing_format, sizeof(bs->backing_format), backing_fmt ?: "");
* 2 GB for 64k clusters, and we don't want to have a 2 GB initial file
* size for any qcow2 image.
*/
- BlockDriverState* bs;
+ BlockBackend *blk;
QCowHeader *header;
uint64_t* refcount_table;
Error *local_err = NULL;
return ret;
}
- bs = NULL;
- ret = bdrv_open(&bs, filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_PROTOCOL,
- &local_err);
- if (ret < 0) {
+ blk = blk_new_open(filename, NULL, NULL,
+ BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
+ if (blk == NULL) {
error_propagate(errp, local_err);
- return ret;
+ return -EIO;
}
+ blk_set_allow_write_beyond_eof(blk, true);
+
/* Write the header */
QEMU_BUILD_BUG_ON((1 << MIN_CLUSTER_BITS) < sizeof(*header));
header = g_malloc0(cluster_size);
cpu_to_be64(QCOW2_COMPAT_LAZY_REFCOUNTS);
}
- ret = bdrv_pwrite(bs, 0, header, cluster_size);
+ ret = blk_pwrite(blk, 0, header, cluster_size);
g_free(header);
if (ret < 0) {
error_setg_errno(errp, -ret, "Could not write qcow2 header");
/* Write a refcount table with one refcount block */
refcount_table = g_malloc0(2 * cluster_size);
refcount_table[0] = cpu_to_be64(2 * cluster_size);
- ret = bdrv_pwrite(bs, cluster_size, refcount_table, 2 * cluster_size);
+ ret = blk_pwrite(blk, cluster_size, refcount_table, 2 * cluster_size);
g_free(refcount_table);
if (ret < 0) {
goto out;
}
- bdrv_unref(bs);
- bs = NULL;
+ blk_unref(blk);
+ blk = NULL;
/*
* And now open the image and make it consistent first (i.e. increase the
*/
options = qdict_new();
qdict_put(options, "driver", qstring_from_str("qcow2"));
- ret = bdrv_open(&bs, filename, NULL, options,
- BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH,
- &local_err);
- if (ret < 0) {
+ blk = blk_new_open(filename, NULL, options,
+ BDRV_O_RDWR | BDRV_O_NO_FLUSH, &local_err);
+ if (blk == NULL) {
error_propagate(errp, local_err);
+ ret = -EIO;
goto out;
}
- ret = qcow2_alloc_clusters(bs, 3 * cluster_size);
+ ret = qcow2_alloc_clusters(blk_bs(blk), 3 * cluster_size);
if (ret < 0) {
error_setg_errno(errp, -ret, "Could not allocate clusters for qcow2 "
"header and refcount table");
abort();
}
+ /* Create a full header (including things like feature table) */
+ ret = qcow2_update_header(blk_bs(blk));
+ if (ret < 0) {
+ error_setg_errno(errp, -ret, "Could not update qcow2 header");
+ goto out;
+ }
+
/* Okay, now that we have a valid image, let's give it the right size */
- ret = bdrv_truncate(bs, total_size);
+ ret = blk_truncate(blk, total_size);
if (ret < 0) {
error_setg_errno(errp, -ret, "Could not resize image");
goto out;
/* Want a backing file? There you go.*/
if (backing_file) {
- ret = bdrv_change_backing_file(bs, backing_file, backing_format);
+ ret = bdrv_change_backing_file(blk_bs(blk), backing_file, backing_format);
if (ret < 0) {
error_setg_errno(errp, -ret, "Could not assign backing file '%s' "
"with format '%s'", backing_file, backing_format);
/* And if we're supposed to preallocate metadata, do that now */
if (prealloc != PREALLOC_MODE_OFF) {
- BDRVQcow2State *s = bs->opaque;
+ BDRVQcow2State *s = blk_bs(blk)->opaque;
qemu_co_mutex_lock(&s->lock);
- ret = preallocate(bs);
+ ret = preallocate(blk_bs(blk));
qemu_co_mutex_unlock(&s->lock);
if (ret < 0) {
error_setg_errno(errp, -ret, "Could not preallocate metadata");
}
}
- bdrv_unref(bs);
- bs = NULL;
+ blk_unref(blk);
+ blk = NULL;
/* Reopen the image without BDRV_O_NO_FLUSH to flush it before returning */
options = qdict_new();
qdict_put(options, "driver", qstring_from_str("qcow2"));
- ret = bdrv_open(&bs, filename, NULL, options,
- BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_NO_BACKING,
- &local_err);
- if (local_err) {
+ blk = blk_new_open(filename, NULL, options,
+ BDRV_O_RDWR | BDRV_O_NO_BACKING, &local_err);
+ if (blk == NULL) {
error_propagate(errp, local_err);
+ ret = -EIO;
goto out;
}
ret = 0;
out:
- if (bs) {
- bdrv_unref(bs);
+ if (blk) {
+ blk_unref(blk);
}
return ret;
}
*spec_info = (ImageInfoSpecific){
.type = IMAGE_INFO_SPECIFIC_KIND_QCOW2,
- .u.qcow2 = g_new(ImageInfoSpecificQCow2, 1),
+ .u.qcow2.data = g_new(ImageInfoSpecificQCow2, 1),
};
if (s->qcow_version == 2) {
- *spec_info->u.qcow2 = (ImageInfoSpecificQCow2){
+ *spec_info->u.qcow2.data = (ImageInfoSpecificQCow2){
.compat = g_strdup("0.10"),
.refcount_bits = s->refcount_bits,
};
} else if (s->qcow_version == 3) {
- *spec_info->u.qcow2 = (ImageInfoSpecificQCow2){
+ *spec_info->u.qcow2.data = (ImageInfoSpecificQCow2){
.compat = g_strdup("1.1"),
.lazy_refcounts = s->compatible_features &
QCOW2_COMPAT_LAZY_REFCOUNTS,
.bdrv_refresh_limits = qcow2_refresh_limits,
.bdrv_invalidate_cache = qcow2_invalidate_cache,
+ .bdrv_inactivate = qcow2_inactivate,
.create_opts = &qcow2_create_opts,
.bdrv_check = qcow2_check,
projects / mirror_qemu.git / blobdiff