[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-block] [Qemu-devel] [PATCH v2 05/16] block: Convert bs->file t
|
From: |
Fam Zheng |
|
Subject: |
Re: [Qemu-block] [Qemu-devel] [PATCH v2 05/16] block: Convert bs->file to BdrvChild |
|
Date: |
Thu, 8 Oct 2015 18:23:01 +0800 |
|
User-agent: |
Mutt/1.5.24 (2015-08-30) |
On Thu, 10/01 15:13, Kevin Wolf wrote:
> @@ -1935,6 +1932,11 @@ void bdrv_close(BlockDriverState *bs)
> bdrv_unref(backing_hd);
> }
>
> + if (bs->file != NULL) {
> + bdrv_unref_child(bs, bs->file);
> + bs->file = NULL;
> + }
> +
> QLIST_FOREACH_SAFE(child, &bs->children, next, next) {
> /* TODO Remove bdrv_unref() from drivers' close function and use
> * bdrv_unref_child() here */
> @@ -1946,7 +1948,6 @@ void bdrv_close(BlockDriverState *bs)
>
> g_free(bs->opaque);
> bs->opaque = NULL;
> - bs->drv = NULL;
> bs->copy_on_read = 0;
> bs->backing_file[0] = '\0';
> bs->backing_format[0] = '\0';
> @@ -1959,11 +1960,6 @@ void bdrv_close(BlockDriverState *bs)
> bs->options = NULL;
> QDECREF(bs->full_open_options);
> bs->full_open_options = NULL;
> -
> - if (bs->file != NULL) {
> - bdrv_unref(bs->file);
> - bs->file = NULL;
> - }
Why do you need to move them up? Changing bdrv_unref to bdrv_unref_child is not
enough?
> }
>
> if (bs->blk) {
> @@ -2566,7 +2562,7 @@ int64_t bdrv_get_allocated_file_size(BlockDriverState
> *bs)
> return drv->bdrv_get_allocated_file_size(bs);
> }
> if (bs->file) {
> - return bdrv_get_allocated_file_size(bs->file);
> + return bdrv_get_allocated_file_size(bs->file->bs);
> }
> return -ENOTSUP;
> }
> @@ -3048,7 +3044,7 @@ int bdrv_debug_breakpoint(BlockDriverState *bs, const
> char *event,
> const char *tag)
> {
> while (bs && bs->drv && !bs->drv->bdrv_debug_breakpoint) {
> - bs = bs->file;
> + bs = bs->file ? bs->file->bs : NULL;
> }
>
> if (bs && bs->drv && bs->drv->bdrv_debug_breakpoint) {
> @@ -3061,7 +3057,7 @@ int bdrv_debug_breakpoint(BlockDriverState *bs, const
> char *event,
> int bdrv_debug_remove_breakpoint(BlockDriverState *bs, const char *tag)
> {
> while (bs && bs->drv && !bs->drv->bdrv_debug_remove_breakpoint) {
> - bs = bs->file;
> + bs = bs->file ? bs->file->bs : NULL;
> }
>
> if (bs && bs->drv && bs->drv->bdrv_debug_remove_breakpoint) {
> @@ -3074,7 +3070,7 @@ int bdrv_debug_remove_breakpoint(BlockDriverState *bs,
> const char *tag)
> int bdrv_debug_resume(BlockDriverState *bs, const char *tag)
> {
> while (bs && (!bs->drv || !bs->drv->bdrv_debug_resume)) {
> - bs = bs->file;
> + bs = bs->file ? bs->file->bs : NULL;
> }
>
> if (bs && bs->drv && bs->drv->bdrv_debug_resume) {
> @@ -3087,7 +3083,7 @@ int bdrv_debug_resume(BlockDriverState *bs, const char
> *tag)
> bool bdrv_debug_is_suspended(BlockDriverState *bs, const char *tag)
> {
> while (bs && bs->drv && !bs->drv->bdrv_debug_is_suspended) {
> - bs = bs->file;
> + bs = bs->file ? bs->file->bs : NULL;
> }
>
> if (bs && bs->drv && bs->drv->bdrv_debug_is_suspended) {
> @@ -3209,7 +3205,7 @@ void bdrv_invalidate_cache(BlockDriverState *bs, Error
> **errp)
> if (bs->drv->bdrv_invalidate_cache) {
> bs->drv->bdrv_invalidate_cache(bs, &local_err);
> } else if (bs->file) {
> - bdrv_invalidate_cache(bs->file, &local_err);
> + bdrv_invalidate_cache(bs->file->bs, &local_err);
> }
> if (local_err) {
> error_propagate(errp, local_err);
> @@ -3939,7 +3935,7 @@ void bdrv_detach_aio_context(BlockDriverState *bs)
> bs->drv->bdrv_detach_aio_context(bs);
> }
> if (bs->file) {
> - bdrv_detach_aio_context(bs->file);
> + bdrv_detach_aio_context(bs->file->bs);
> }
> if (bs->backing_hd) {
> bdrv_detach_aio_context(bs->backing_hd);
> @@ -3963,7 +3959,7 @@ void bdrv_attach_aio_context(BlockDriverState *bs,
> bdrv_attach_aio_context(bs->backing_hd, new_context);
> }
> if (bs->file) {
> - bdrv_attach_aio_context(bs->file, new_context);
> + bdrv_attach_aio_context(bs->file->bs, new_context);
> }
> if (bs->drv->bdrv_attach_aio_context) {
> bs->drv->bdrv_attach_aio_context(bs, new_context);
> @@ -4175,7 +4171,7 @@ void bdrv_refresh_filename(BlockDriverState *bs)
> /* This BDS's file name will most probably depend on its file's name, so
> * refresh that first */
> if (bs->file) {
> - bdrv_refresh_filename(bs->file);
> + bdrv_refresh_filename(bs->file->bs);
> }
>
> if (drv->bdrv_refresh_filename) {
> @@ -4203,19 +4199,20 @@ void bdrv_refresh_filename(BlockDriverState *bs)
>
> /* If no specific options have been given for this BDS, the filename
> of
> * the underlying file should suffice for this one as well */
> - if (bs->file->exact_filename[0] && !has_open_options) {
> - strcpy(bs->exact_filename, bs->file->exact_filename);
> + if (bs->file->bs->exact_filename[0] && !has_open_options) {
> + strcpy(bs->exact_filename, bs->file->bs->exact_filename);
> }
> /* Reconstructing the full options QDict is simple for most format
> block
> * drivers, as long as the full options are known for the underlying
> * file BDS. The full options QDict of that file BDS should somehow
> * contain a representation of the filename, therefore the following
> * suffices without querying the (exact_)filename of this BDS. */
> - if (bs->file->full_open_options) {
> + if (bs->file->bs->full_open_options) {
> qdict_put_obj(opts, "driver",
> QOBJECT(qstring_from_str(drv->format_name)));
> - QINCREF(bs->file->full_open_options);
> - qdict_put_obj(opts, "file",
> QOBJECT(bs->file->full_open_options));
> + QINCREF(bs->file->bs->full_open_options);
> + qdict_put_obj(opts, "file",
> + QOBJECT(bs->file->bs->full_open_options));
>
> bs->full_open_options = opts;
> } else {
> diff --git a/block/blkdebug.c b/block/blkdebug.c
> index bc247f4..117fce6 100644
> --- a/block/blkdebug.c
> +++ b/block/blkdebug.c
> @@ -427,10 +427,10 @@ static int blkdebug_open(BlockDriverState *bs, QDict
> *options, int flags,
> s->state = 1;
>
> /* Open the backing file */
Isn't "backing file" a confusing term for bs->file given that we have
bs->backing_hd? :)
> - assert(bs->file == NULL);
> - ret = bdrv_open_image(&bs->file, qemu_opt_get(opts, "x-image"), options,
> "image",
> - bs, &child_file, false, &local_err);
> - if (ret < 0) {
Should we keep the assertion?
> + bs->file = bdrv_open_child(qemu_opt_get(opts, "x-image"), options,
> "image",
> + bs, &child_file, false, &local_err);
> + if (local_err) {
> + ret = -EINVAL;
> error_propagate(errp, local_err);
> goto out;
> }
> @@ -449,7 +449,7 @@ static int blkdebug_open(BlockDriverState *bs, QDict
> *options, int flags,
> goto out;
>
> fail_unref:
> - bdrv_unref(bs->file);
> + bdrv_unref(bs->file->bs);
> out:
> qemu_opts_del(opts);
> return ret;
> @@ -510,7 +510,8 @@ static BlockAIOCB *blkdebug_aio_readv(BlockDriverState
> *bs,
> return inject_error(bs, cb, opaque, rule);
> }
>
> - return bdrv_aio_readv(bs->file, sector_num, qiov, nb_sectors, cb,
> opaque);
> + return bdrv_aio_readv(bs->file->bs, sector_num, qiov, nb_sectors,
> + cb, opaque);
> }
>
> static BlockAIOCB *blkdebug_aio_writev(BlockDriverState *bs,
> @@ -532,7 +533,8 @@ static BlockAIOCB *blkdebug_aio_writev(BlockDriverState
> *bs,
> return inject_error(bs, cb, opaque, rule);
> }
>
> - return bdrv_aio_writev(bs->file, sector_num, qiov, nb_sectors, cb,
> opaque);
> + return bdrv_aio_writev(bs->file->bs, sector_num, qiov, nb_sectors,
> + cb, opaque);
> }
>
> static BlockAIOCB *blkdebug_aio_flush(BlockDriverState *bs,
> @@ -551,7 +553,7 @@ static BlockAIOCB *blkdebug_aio_flush(BlockDriverState
> *bs,
> return inject_error(bs, cb, opaque, rule);
> }
>
> - return bdrv_aio_flush(bs->file, cb, opaque);
> + return bdrv_aio_flush(bs->file->bs, cb, opaque);
> }
>
>
> @@ -716,12 +718,12 @@ static bool
> blkdebug_debug_is_suspended(BlockDriverState *bs, const char *tag)
>
> static int64_t blkdebug_getlength(BlockDriverState *bs)
> {
> - return bdrv_getlength(bs->file);
> + return bdrv_getlength(bs->file->bs);
> }
>
> static int blkdebug_truncate(BlockDriverState *bs, int64_t offset)
> {
> - return bdrv_truncate(bs->file, offset);
> + return bdrv_truncate(bs->file->bs, offset);
> }
>
> static void blkdebug_refresh_filename(BlockDriverState *bs)
> @@ -741,24 +743,24 @@ static void blkdebug_refresh_filename(BlockDriverState
> *bs)
> }
> }
>
> - if (force_json && !bs->file->full_open_options) {
> + if (force_json && !bs->file->bs->full_open_options) {
> /* The config file cannot be recreated, so creating a plain filename
> * is impossible */
> return;
> }
>
> - if (!force_json && bs->file->exact_filename[0]) {
> + if (!force_json && bs->file->bs->exact_filename[0]) {
> snprintf(bs->exact_filename, sizeof(bs->exact_filename),
> "blkdebug:%s:%s",
> qdict_get_try_str(bs->options, "config") ?: "",
> - bs->file->exact_filename);
> + bs->file->bs->exact_filename);
> }
>
> opts = qdict_new();
> qdict_put_obj(opts, "driver", QOBJECT(qstring_from_str("blkdebug")));
>
> - QINCREF(bs->file->full_open_options);
> - qdict_put_obj(opts, "image", QOBJECT(bs->file->full_open_options));
> + QINCREF(bs->file->bs->full_open_options);
> + qdict_put_obj(opts, "image", QOBJECT(bs->file->bs->full_open_options));
>
> for (e = qdict_first(bs->options); e; e = qdict_next(bs->options, e)) {
> if (strcmp(qdict_entry_key(e), "x-image") &&
> diff --git a/block/blkverify.c b/block/blkverify.c
> index 6b71622..f8655ad 100644
> --- a/block/blkverify.c
> +++ b/block/blkverify.c
> @@ -123,10 +123,10 @@ static int blkverify_open(BlockDriverState *bs, QDict
> *options, int flags,
> }
>
> /* Open the raw file */
> - assert(bs->file == NULL);
> - ret = bdrv_open_image(&bs->file, qemu_opt_get(opts, "x-raw"), options,
> - "raw", bs, &child_file, false, &local_err);
> - if (ret < 0) {
Same as above, should we keep the assert?
> + bs->file = bdrv_open_child(qemu_opt_get(opts, "x-raw"), options, "raw",
> + bs, &child_file, false, &local_err);
> + if (local_err) {
> + ret = -EINVAL;
> error_propagate(errp, local_err);
> goto fail;
> }
> @@ -238,13 +238,13 @@ static BlockAIOCB *blkverify_aio_readv(BlockDriverState
> *bs,
> nb_sectors, cb, opaque);
>
> acb->verify = blkverify_verify_readv;
> - acb->buf = qemu_blockalign(bs->file, qiov->size);
> + acb->buf = qemu_blockalign(bs->file->bs, qiov->size);
> qemu_iovec_init(&acb->raw_qiov, acb->qiov->niov);
> qemu_iovec_clone(&acb->raw_qiov, qiov, acb->buf);
>
> bdrv_aio_readv(s->test_file->bs, sector_num, qiov, nb_sectors,
> blkverify_aio_cb, acb);
> - bdrv_aio_readv(bs->file, sector_num, &acb->raw_qiov, nb_sectors,
> + bdrv_aio_readv(bs->file->bs, sector_num, &acb->raw_qiov, nb_sectors,
> blkverify_aio_cb, acb);
> return &acb->common;
> }
> @@ -259,7 +259,7 @@ static BlockAIOCB *blkverify_aio_writev(BlockDriverState
> *bs,
>
> bdrv_aio_writev(s->test_file->bs, sector_num, qiov, nb_sectors,
> blkverify_aio_cb, acb);
> - bdrv_aio_writev(bs->file, sector_num, qiov, nb_sectors,
> + bdrv_aio_writev(bs->file->bs, sector_num, qiov, nb_sectors,
> blkverify_aio_cb, acb);
> return &acb->common;
> }
> @@ -279,7 +279,7 @@ static bool
> blkverify_recurse_is_first_non_filter(BlockDriverState *bs,
> {
> BDRVBlkverifyState *s = bs->opaque;
>
> - bool perm = bdrv_recurse_is_first_non_filter(bs->file, candidate);
> + bool perm = bdrv_recurse_is_first_non_filter(bs->file->bs, candidate);
>
> if (perm) {
> return true;
> @@ -308,15 +308,17 @@ static void blkverify_refresh_filename(BlockDriverState
> *bs)
> {
> BDRVBlkverifyState *s = bs->opaque;
>
> - /* bs->file has already been refreshed */
> + /* bs->file->bs has already been refreshed */
> bdrv_refresh_filename(s->test_file->bs);
>
> - if (bs->file->full_open_options && s->test_file->bs->full_open_options) {
> + if (bs->file->bs->full_open_options
> + && s->test_file->bs->full_open_options)
> + {
> QDict *opts = qdict_new();
> qdict_put_obj(opts, "driver",
> QOBJECT(qstring_from_str("blkverify")));
>
> - QINCREF(bs->file->full_open_options);
> - qdict_put_obj(opts, "raw", QOBJECT(bs->file->full_open_options));
> + QINCREF(bs->file->bs->full_open_options);
> + qdict_put_obj(opts, "raw", QOBJECT(bs->file->bs->full_open_options));
> QINCREF(s->test_file->bs->full_open_options);
> qdict_put_obj(opts, "test",
> QOBJECT(s->test_file->bs->full_open_options));
> @@ -324,10 +326,13 @@ static void blkverify_refresh_filename(BlockDriverState
> *bs)
> bs->full_open_options = opts;
> }
>
> - if (bs->file->exact_filename[0] && s->test_file->bs->exact_filename[0]) {
> + if (bs->file->bs->exact_filename[0]
> + && s->test_file->bs->exact_filename[0])
> + {
> snprintf(bs->exact_filename, sizeof(bs->exact_filename),
> "blkverify:%s:%s",
> - bs->file->exact_filename, s->test_file->bs->exact_filename);
> + bs->file->bs->exact_filename,
> + s->test_file->bs->exact_filename);
> }
> }
>
> diff --git a/block/bochs.c b/block/bochs.c
> index 199ac2b..18949b9 100644
> --- a/block/bochs.c
> +++ b/block/bochs.c
> @@ -103,7 +103,7 @@ static int bochs_open(BlockDriverState *bs, QDict
> *options, int flags,
>
> bs->read_only = 1; // no write support yet
>
> - ret = bdrv_pread(bs->file, 0, &bochs, sizeof(bochs));
> + ret = bdrv_pread(bs->file->bs, 0, &bochs, sizeof(bochs));
> if (ret < 0) {
> return ret;
> }
> @@ -137,7 +137,7 @@ static int bochs_open(BlockDriverState *bs, QDict
> *options, int flags,
> return -ENOMEM;
> }
>
> - ret = bdrv_pread(bs->file, le32_to_cpu(bochs.header), s->catalog_bitmap,
> + ret = bdrv_pread(bs->file->bs, le32_to_cpu(bochs.header),
> s->catalog_bitmap,
> s->catalog_size * 4);
> if (ret < 0) {
> goto fail;
> @@ -206,7 +206,7 @@ static int64_t seek_to_sector(BlockDriverState *bs,
> int64_t sector_num)
> (s->extent_blocks + s->bitmap_blocks));
>
> /* read in bitmap for current extent */
> - ret = bdrv_pread(bs->file, bitmap_offset + (extent_offset / 8),
> + ret = bdrv_pread(bs->file->bs, bitmap_offset + (extent_offset / 8),
> &bitmap_entry, 1);
> if (ret < 0) {
> return ret;
> @@ -229,7 +229,7 @@ static int bochs_read(BlockDriverState *bs, int64_t
> sector_num,
> if (block_offset < 0) {
> return block_offset;
> } else if (block_offset > 0) {
> - ret = bdrv_pread(bs->file, block_offset, buf, 512);
> + ret = bdrv_pread(bs->file->bs, block_offset, buf, 512);
> if (ret < 0) {
> return ret;
> }
> diff --git a/block/cloop.c b/block/cloop.c
> index f328be0..4190ae0 100644
> --- a/block/cloop.c
> +++ b/block/cloop.c
> @@ -66,7 +66,7 @@ static int cloop_open(BlockDriverState *bs, QDict *options,
> int flags,
> bs->read_only = 1;
>
> /* read header */
> - ret = bdrv_pread(bs->file, 128, &s->block_size, 4);
> + ret = bdrv_pread(bs->file->bs, 128, &s->block_size, 4);
> if (ret < 0) {
> return ret;
> }
> @@ -92,7 +92,7 @@ static int cloop_open(BlockDriverState *bs, QDict *options,
> int flags,
> return -EINVAL;
> }
>
> - ret = bdrv_pread(bs->file, 128 + 4, &s->n_blocks, 4);
> + ret = bdrv_pread(bs->file->bs, 128 + 4, &s->n_blocks, 4);
> if (ret < 0) {
> return ret;
> }
> @@ -123,7 +123,7 @@ static int cloop_open(BlockDriverState *bs, QDict
> *options, int flags,
> return -ENOMEM;
> }
>
> - ret = bdrv_pread(bs->file, 128 + 4 + 4, s->offsets, offsets_size);
> + ret = bdrv_pread(bs->file->bs, 128 + 4 + 4, s->offsets, offsets_size);
> if (ret < 0) {
> goto fail;
> }
> @@ -203,8 +203,8 @@ static inline int cloop_read_block(BlockDriverState *bs,
> int block_num)
> int ret;
> uint32_t bytes = s->offsets[block_num + 1] - s->offsets[block_num];
>
> - ret = bdrv_pread(bs->file, s->offsets[block_num],
> s->compressed_block,
> - bytes);
> + ret = bdrv_pread(bs->file->bs, s->offsets[block_num],
> + s->compressed_block, bytes);
> if (ret != bytes) {
> return -1;
> }
> diff --git a/block/dmg.c b/block/dmg.c
> index 9f25281..546a6f5 100644
> --- a/block/dmg.c
> +++ b/block/dmg.c
> @@ -85,7 +85,7 @@ static int read_uint64(BlockDriverState *bs, int64_t
> offset, uint64_t *result)
> uint64_t buffer;
> int ret;
>
> - ret = bdrv_pread(bs->file, offset, &buffer, 8);
> + ret = bdrv_pread(bs->file->bs, offset, &buffer, 8);
> if (ret < 0) {
> return ret;
> }
> @@ -99,7 +99,7 @@ static int read_uint32(BlockDriverState *bs, int64_t
> offset, uint32_t *result)
> uint32_t buffer;
> int ret;
>
> - ret = bdrv_pread(bs->file, offset, &buffer, 4);
> + ret = bdrv_pread(bs->file->bs, offset, &buffer, 4);
> if (ret < 0) {
> return ret;
> }
> @@ -354,7 +354,7 @@ static int dmg_read_resource_fork(BlockDriverState *bs,
> DmgHeaderState *ds,
> offset += 4;
>
> buffer = g_realloc(buffer, count);
> - ret = bdrv_pread(bs->file, offset, buffer, count);
> + ret = bdrv_pread(bs->file->bs, offset, buffer, count);
> if (ret < 0) {
> goto fail;
> }
> @@ -391,7 +391,7 @@ static int dmg_read_plist_xml(BlockDriverState *bs,
> DmgHeaderState *ds,
>
> buffer = g_malloc(info_length + 1);
> buffer[info_length] = '\0';
> - ret = bdrv_pread(bs->file, info_begin, buffer, info_length);
> + ret = bdrv_pread(bs->file->bs, info_begin, buffer, info_length);
> if (ret != info_length) {
> ret = -EINVAL;
> goto fail;
> @@ -446,7 +446,7 @@ static int dmg_open(BlockDriverState *bs, QDict *options,
> int flags,
> ds.max_sectors_per_chunk = 1;
>
> /* locate the UDIF trailer */
> - offset = dmg_find_koly_offset(bs->file, errp);
> + offset = dmg_find_koly_offset(bs->file->bs, errp);
> if (offset < 0) {
> ret = offset;
> goto fail;
> @@ -514,9 +514,9 @@ static int dmg_open(BlockDriverState *bs, QDict *options,
> int flags,
> }
>
> /* initialize zlib engine */
> - s->compressed_chunk = qemu_try_blockalign(bs->file,
> + s->compressed_chunk = qemu_try_blockalign(bs->file->bs,
> ds.max_compressed_size + 1);
> - s->uncompressed_chunk = qemu_try_blockalign(bs->file,
> + s->uncompressed_chunk = qemu_try_blockalign(bs->file->bs,
> 512 *
> ds.max_sectors_per_chunk);
> if (s->compressed_chunk == NULL || s->uncompressed_chunk == NULL) {
> ret = -ENOMEM;
> @@ -592,7 +592,7 @@ static inline int dmg_read_chunk(BlockDriverState *bs,
> uint64_t sector_num)
> case 0x80000005: { /* zlib compressed */
> /* we need to buffer, because only the chunk as whole can be
> * inflated. */
> - ret = bdrv_pread(bs->file, s->offsets[chunk],
> + ret = bdrv_pread(bs->file->bs, s->offsets[chunk],
> s->compressed_chunk, s->lengths[chunk]);
> if (ret != s->lengths[chunk]) {
> return -1;
> @@ -616,7 +616,7 @@ static inline int dmg_read_chunk(BlockDriverState *bs,
> uint64_t sector_num)
> case 0x80000006: /* bzip2 compressed */
> /* we need to buffer, because only the chunk as whole can be
> * inflated. */
> - ret = bdrv_pread(bs->file, s->offsets[chunk],
> + ret = bdrv_pread(bs->file->bs, s->offsets[chunk],
> s->compressed_chunk, s->lengths[chunk]);
> if (ret != s->lengths[chunk]) {
> return -1;
> @@ -641,7 +641,7 @@ static inline int dmg_read_chunk(BlockDriverState *bs,
> uint64_t sector_num)
> break;
> #endif /* CONFIG_BZIP2 */
> case 1: /* copy */
> - ret = bdrv_pread(bs->file, s->offsets[chunk],
> + ret = bdrv_pread(bs->file->bs, s->offsets[chunk],
> s->uncompressed_chunk, s->lengths[chunk]);
> if (ret != s->lengths[chunk]) {
> return -1;
> diff --git a/block/io.c b/block/io.c
> index 94e18e6..15c676a 100644
> --- a/block/io.c
> +++ b/block/io.c
> @@ -156,15 +156,15 @@ void bdrv_refresh_limits(BlockDriverState *bs, Error
> **errp)
>
> /* Take some limits from the children as a default */
> if (bs->file) {
> - bdrv_refresh_limits(bs->file, &local_err);
> + bdrv_refresh_limits(bs->file->bs, &local_err);
> if (local_err) {
> error_propagate(errp, local_err);
> return;
> }
> - bs->bl.opt_transfer_length = bs->file->bl.opt_transfer_length;
> - bs->bl.max_transfer_length = bs->file->bl.max_transfer_length;
> - bs->bl.min_mem_alignment = bs->file->bl.min_mem_alignment;
> - bs->bl.opt_mem_alignment = bs->file->bl.opt_mem_alignment;
> + bs->bl.opt_transfer_length = bs->file->bs->bl.opt_transfer_length;
> + bs->bl.max_transfer_length = bs->file->bs->bl.max_transfer_length;
> + bs->bl.min_mem_alignment = bs->file->bs->bl.min_mem_alignment;
> + bs->bl.opt_mem_alignment = bs->file->bs->bl.opt_mem_alignment;
> } else {
> bs->bl.min_mem_alignment = 512;
> bs->bl.opt_mem_alignment = getpagesize();
> @@ -224,7 +224,7 @@ static bool bdrv_requests_pending(BlockDriverState *bs)
> if (!qemu_co_queue_empty(&bs->throttled_reqs[1])) {
> return true;
> }
> - if (bs->file && bdrv_requests_pending(bs->file)) {
> + if (bs->file && bdrv_requests_pending(bs->file->bs)) {
> return true;
> }
> if (bs->backing_hd && bdrv_requests_pending(bs->backing_hd)) {
> @@ -1137,13 +1137,13 @@ static int coroutine_fn
> bdrv_aligned_pwritev(BlockDriverState *bs,
> if (ret < 0) {
> /* Do nothing, write notifier decided to fail this request */
> } else if (flags & BDRV_REQ_ZERO_WRITE) {
> - BLKDBG_EVENT(bs, BLKDBG_PWRITEV_ZERO);
> + bdrv_debug_event(bs, BLKDBG_PWRITEV_ZERO);
> ret = bdrv_co_do_write_zeroes(bs, sector_num, nb_sectors, flags);
> } else {
> - BLKDBG_EVENT(bs, BLKDBG_PWRITEV);
> + bdrv_debug_event(bs, BLKDBG_PWRITEV);
> ret = drv->bdrv_co_writev(bs, sector_num, nb_sectors, qiov);
> }
> - BLKDBG_EVENT(bs, BLKDBG_PWRITEV_DONE);
> + bdrv_debug_event(bs, BLKDBG_PWRITEV_DONE);
>
> if (ret == 0 && !bs->enable_write_cache) {
> ret = bdrv_co_flush(bs);
> @@ -1192,13 +1192,13 @@ static int coroutine_fn
> bdrv_co_do_zero_pwritev(BlockDriverState *bs,
> /* RMW the unaligned part before head. */
> mark_request_serialising(req, align);
> wait_serialising_requests(req);
> - BLKDBG_EVENT(bs, BLKDBG_PWRITEV_RMW_HEAD);
> + bdrv_debug_event(bs, BLKDBG_PWRITEV_RMW_HEAD);
> ret = bdrv_aligned_preadv(bs, req, offset & ~(align - 1), align,
> align, &local_qiov, 0);
> if (ret < 0) {
> goto fail;
> }
> - BLKDBG_EVENT(bs, BLKDBG_PWRITEV_RMW_AFTER_HEAD);
> + bdrv_debug_event(bs, BLKDBG_PWRITEV_RMW_AFTER_HEAD);
>
> memset(buf + head_padding_bytes, 0, zero_bytes);
> ret = bdrv_aligned_pwritev(bs, req, offset & ~(align - 1), align,
> @@ -1230,13 +1230,13 @@ static int coroutine_fn
> bdrv_co_do_zero_pwritev(BlockDriverState *bs,
> /* RMW the unaligned part after tail. */
> mark_request_serialising(req, align);
> wait_serialising_requests(req);
> - BLKDBG_EVENT(bs, BLKDBG_PWRITEV_RMW_TAIL);
> + bdrv_debug_event(bs, BLKDBG_PWRITEV_RMW_TAIL);
> ret = bdrv_aligned_preadv(bs, req, offset, align,
> align, &local_qiov, 0);
> if (ret < 0) {
> goto fail;
> }
> - BLKDBG_EVENT(bs, BLKDBG_PWRITEV_RMW_AFTER_TAIL);
> + bdrv_debug_event(bs, BLKDBG_PWRITEV_RMW_AFTER_TAIL);
>
> memset(buf, 0, bytes);
> ret = bdrv_aligned_pwritev(bs, req, offset, align,
> @@ -1307,13 +1307,13 @@ static int coroutine_fn
> bdrv_co_do_pwritev(BlockDriverState *bs,
> };
> qemu_iovec_init_external(&head_qiov, &head_iov, 1);
>
> - BLKDBG_EVENT(bs, BLKDBG_PWRITEV_RMW_HEAD);
> + bdrv_debug_event(bs, BLKDBG_PWRITEV_RMW_HEAD);
> ret = bdrv_aligned_preadv(bs, &req, offset & ~(align - 1), align,
> align, &head_qiov, 0);
> if (ret < 0) {
> goto fail;
> }
> - BLKDBG_EVENT(bs, BLKDBG_PWRITEV_RMW_AFTER_HEAD);
> + bdrv_debug_event(bs, BLKDBG_PWRITEV_RMW_AFTER_HEAD);
>
> qemu_iovec_init(&local_qiov, qiov->niov + 2);
> qemu_iovec_add(&local_qiov, head_buf, offset & (align - 1));
> @@ -1341,13 +1341,13 @@ static int coroutine_fn
> bdrv_co_do_pwritev(BlockDriverState *bs,
> };
> qemu_iovec_init_external(&tail_qiov, &tail_iov, 1);
>
> - BLKDBG_EVENT(bs, BLKDBG_PWRITEV_RMW_TAIL);
> + bdrv_debug_event(bs, BLKDBG_PWRITEV_RMW_TAIL);
> ret = bdrv_aligned_preadv(bs, &req, (offset + bytes) & ~(align - 1),
> align,
> align, &tail_qiov, 0);
> if (ret < 0) {
> goto fail;
> }
> - BLKDBG_EVENT(bs, BLKDBG_PWRITEV_RMW_AFTER_TAIL);
> + bdrv_debug_event(bs, BLKDBG_PWRITEV_RMW_AFTER_TAIL);
>
> if (!use_local_qiov) {
> qemu_iovec_init(&local_qiov, qiov->niov + 1);
> @@ -1496,7 +1496,7 @@ static int64_t coroutine_fn
> bdrv_co_get_block_status(BlockDriverState *bs,
>
> if (ret & BDRV_BLOCK_RAW) {
> assert(ret & BDRV_BLOCK_OFFSET_VALID);
> - return bdrv_get_block_status(bs->file, ret >> BDRV_SECTOR_BITS,
> + return bdrv_get_block_status(bs->file->bs, ret >> BDRV_SECTOR_BITS,
> *pnum, pnum);
> }
>
> @@ -1519,7 +1519,7 @@ static int64_t coroutine_fn
> bdrv_co_get_block_status(BlockDriverState *bs,
> (ret & BDRV_BLOCK_OFFSET_VALID)) {
> int file_pnum;
>
> - ret2 = bdrv_co_get_block_status(bs->file, ret >> BDRV_SECTOR_BITS,
> + ret2 = bdrv_co_get_block_status(bs->file->bs, ret >>
> BDRV_SECTOR_BITS,
> *pnum, &file_pnum);
> if (ret2 >= 0) {
> /* Ignore errors. This is just providing extra information, it
> @@ -1723,7 +1723,7 @@ int bdrv_writev_vmstate(BlockDriverState *bs,
> QEMUIOVector *qiov, int64_t pos)
> } else if (drv->bdrv_save_vmstate) {
> return drv->bdrv_save_vmstate(bs, qiov, pos);
> } else if (bs->file) {
> - return bdrv_writev_vmstate(bs->file, qiov, pos);
> + return bdrv_writev_vmstate(bs->file->bs, qiov, pos);
> }
>
> return -ENOTSUP;
> @@ -1738,7 +1738,7 @@ int bdrv_load_vmstate(BlockDriverState *bs, uint8_t
> *buf,
> if (drv->bdrv_load_vmstate)
> return drv->bdrv_load_vmstate(bs, buf, pos, size);
> if (bs->file)
> - return bdrv_load_vmstate(bs->file, buf, pos, size);
> + return bdrv_load_vmstate(bs->file->bs, buf, pos, size);
> return -ENOTSUP;
> }
>
> @@ -2366,7 +2366,7 @@ int coroutine_fn bdrv_co_flush(BlockDriverState *bs)
> * in the case of cache=unsafe, so there are no useless flushes.
> */
> flush_parent:
> - return bdrv_co_flush(bs->file);
> + return bs->file ? bdrv_co_flush(bs->file->bs) : 0;
> }
>
> int bdrv_flush(BlockDriverState *bs)
> @@ -2594,7 +2594,7 @@ void bdrv_io_plug(BlockDriverState *bs)
> if (drv && drv->bdrv_io_plug) {
> drv->bdrv_io_plug(bs);
> } else if (bs->file) {
> - bdrv_io_plug(bs->file);
> + bdrv_io_plug(bs->file->bs);
> }
> }
>
> @@ -2604,7 +2604,7 @@ void bdrv_io_unplug(BlockDriverState *bs)
> if (drv && drv->bdrv_io_unplug) {
> drv->bdrv_io_unplug(bs);
> } else if (bs->file) {
> - bdrv_io_unplug(bs->file);
> + bdrv_io_unplug(bs->file->bs);
> }
> }
>
> @@ -2614,7 +2614,7 @@ void bdrv_flush_io_queue(BlockDriverState *bs)
> if (drv && drv->bdrv_flush_io_queue) {
> drv->bdrv_flush_io_queue(bs);
> } else if (bs->file) {
> - bdrv_flush_io_queue(bs->file);
> + bdrv_flush_io_queue(bs->file->bs);
> }
> bdrv_start_throttled_reqs(bs);
> }
> diff --git a/block/parallels.c b/block/parallels.c
> index 5cd6ec3..4f79293 100644
> --- a/block/parallels.c
> +++ b/block/parallels.c
> @@ -202,13 +202,13 @@ static int64_t allocate_clusters(BlockDriverState *bs,
> int64_t sector_num,
>
> to_allocate = (sector_num + *pnum + s->tracks - 1) / s->tracks - idx;
> space = to_allocate * s->tracks;
> - if (s->data_end + space > bdrv_getlength(bs->file) >> BDRV_SECTOR_BITS) {
> + if (s->data_end + space > bdrv_getlength(bs->file->bs) >>
> BDRV_SECTOR_BITS) {
> int ret;
> space += s->prealloc_size;
> if (s->prealloc_mode == PRL_PREALLOC_MODE_FALLOCATE) {
> - ret = bdrv_write_zeroes(bs->file, s->data_end, space, 0);
> + ret = bdrv_write_zeroes(bs->file->bs, s->data_end, space, 0);
> } else {
> - ret = bdrv_truncate(bs->file,
> + ret = bdrv_truncate(bs->file->bs,
> (s->data_end + space) << BDRV_SECTOR_BITS);
> }
> if (ret < 0) {
> @@ -244,7 +244,8 @@ static coroutine_fn int
> parallels_co_flush_to_os(BlockDriverState *bs)
> if (off + to_write > s->header_size) {
> to_write = s->header_size - off;
> }
> - ret = bdrv_pwrite(bs->file, off, (uint8_t *)s->header + off,
> to_write);
> + ret = bdrv_pwrite(bs->file->bs, off, (uint8_t *)s->header + off,
> + to_write);
> if (ret < 0) {
> qemu_co_mutex_unlock(&s->lock);
> return ret;
> @@ -303,7 +304,7 @@ static coroutine_fn int
> parallels_co_writev(BlockDriverState *bs,
> qemu_iovec_reset(&hd_qiov);
> qemu_iovec_concat(&hd_qiov, qiov, bytes_done, nbytes);
>
> - ret = bdrv_co_writev(bs->file, position, n, &hd_qiov);
> + ret = bdrv_co_writev(bs->file->bs, position, n, &hd_qiov);
> if (ret < 0) {
> break;
> }
> @@ -343,7 +344,7 @@ static coroutine_fn int
> parallels_co_readv(BlockDriverState *bs,
> qemu_iovec_reset(&hd_qiov);
> qemu_iovec_concat(&hd_qiov, qiov, bytes_done, nbytes);
>
> - ret = bdrv_co_readv(bs->file, position, n, &hd_qiov);
> + ret = bdrv_co_readv(bs->file->bs, position, n, &hd_qiov);
> if (ret < 0) {
> break;
> }
> @@ -369,7 +370,7 @@ static int parallels_check(BlockDriverState *bs,
> BdrvCheckResult *res,
> bool flush_bat = false;
> int cluster_size = s->tracks << BDRV_SECTOR_BITS;
>
> - size = bdrv_getlength(bs->file);
> + size = bdrv_getlength(bs->file->bs);
> if (size < 0) {
> res->check_errors++;
> return size;
> @@ -424,7 +425,7 @@ static int parallels_check(BlockDriverState *bs,
> BdrvCheckResult *res,
> }
>
> if (flush_bat) {
> - ret = bdrv_pwrite_sync(bs->file, 0, s->header, s->header_size);
> + ret = bdrv_pwrite_sync(bs->file->bs, 0, s->header, s->header_size);
> if (ret < 0) {
> res->check_errors++;
> return ret;
> @@ -440,7 +441,7 @@ static int parallels_check(BlockDriverState *bs,
> BdrvCheckResult *res,
> size - res->image_end_offset);
> res->leaks += count;
> if (fix & BDRV_FIX_LEAKS) {
> - ret = bdrv_truncate(bs->file, res->image_end_offset);
> + ret = bdrv_truncate(bs->file->bs, res->image_end_offset);
> if (ret < 0) {
> res->check_errors++;
> return ret;
> @@ -546,12 +547,13 @@ static int parallels_probe(const uint8_t *buf, int
> buf_size,
> static int parallels_update_header(BlockDriverState *bs)
> {
> BDRVParallelsState *s = bs->opaque;
> - unsigned size = MAX(bdrv_opt_mem_align(bs->file),
> sizeof(ParallelsHeader));
> + unsigned size = MAX(bdrv_opt_mem_align(bs->file->bs),
> + sizeof(ParallelsHeader));
>
> if (size > s->header_size) {
> size = s->header_size;
> }
> - return bdrv_pwrite_sync(bs->file, 0, s->header, size);
> + return bdrv_pwrite_sync(bs->file->bs, 0, s->header, size);
> }
>
> static int parallels_open(BlockDriverState *bs, QDict *options, int flags,
> @@ -564,7 +566,7 @@ static int parallels_open(BlockDriverState *bs, QDict
> *options, int flags,
> Error *local_err = NULL;
> char *buf;
>
> - ret = bdrv_pread(bs->file, 0, &ph, sizeof(ph));
> + ret = bdrv_pread(bs->file->bs, 0, &ph, sizeof(ph));
> if (ret < 0) {
> goto fail;
> }
> @@ -603,8 +605,8 @@ static int parallels_open(BlockDriverState *bs, QDict
> *options, int flags,
> }
>
> size = bat_entry_off(s->bat_size);
> - s->header_size = ROUND_UP(size, bdrv_opt_mem_align(bs->file));
> - s->header = qemu_try_blockalign(bs->file, s->header_size);
> + s->header_size = ROUND_UP(size, bdrv_opt_mem_align(bs->file->bs));
> + s->header = qemu_try_blockalign(bs->file->bs, s->header_size);
> if (s->header == NULL) {
> ret = -ENOMEM;
> goto fail;
> @@ -619,7 +621,7 @@ static int parallels_open(BlockDriverState *bs, QDict
> *options, int flags,
> s->header_size = size;
> }
>
> - ret = bdrv_pread(bs->file, 0, s->header, s->header_size);
> + ret = bdrv_pread(bs->file->bs, 0, s->header, s->header_size);
> if (ret < 0) {
> goto fail;
> }
> @@ -663,8 +665,8 @@ static int parallels_open(BlockDriverState *bs, QDict
> *options, int flags,
> if (local_err != NULL) {
> goto fail_options;
> }
> - if (!bdrv_has_zero_init(bs->file) ||
> - bdrv_truncate(bs->file, bdrv_getlength(bs->file)) != 0) {
> + if (!bdrv_has_zero_init(bs->file->bs) ||
> + bdrv_truncate(bs->file->bs, bdrv_getlength(bs->file->bs)) != 0) {
> s->prealloc_mode = PRL_PREALLOC_MODE_FALLOCATE;
> }
>
> @@ -707,7 +709,7 @@ static void parallels_close(BlockDriverState *bs)
> }
>
> if (bs->open_flags & BDRV_O_RDWR) {
> - bdrv_truncate(bs->file, s->data_end << BDRV_SECTOR_BITS);
> + bdrv_truncate(bs->file->bs, s->data_end << BDRV_SECTOR_BITS);
> }
>
> g_free(s->bat_dirty_bmap);
> diff --git a/block/qapi.c b/block/qapi.c
> index 2ce5097..0c4654e 100644
> --- a/block/qapi.c
> +++ b/block/qapi.c
> @@ -359,7 +359,7 @@ static BlockStats *bdrv_query_stats(const
> BlockDriverState *bs,
>
> if (bs->file) {
> s->has_parent = true;
> - s->parent = bdrv_query_stats(bs->file, query_backing);
> + s->parent = bdrv_query_stats(bs->file->bs, query_backing);
> }
>
> if (query_backing && bs->backing_hd) {
> diff --git a/block/qcow.c b/block/qcow.c
> index 6e35db1..4d20cd5 100644
> --- a/block/qcow.c
> +++ b/block/qcow.c
> @@ -100,7 +100,7 @@ static int qcow_open(BlockDriverState *bs, QDict
> *options, int flags,
> int ret;
> QCowHeader header;
>
> - ret = bdrv_pread(bs->file, 0, &header, sizeof(header));
> + ret = bdrv_pread(bs->file->bs, 0, &header, sizeof(header));
> if (ret < 0) {
> goto fail;
> }
> @@ -193,7 +193,7 @@ static int qcow_open(BlockDriverState *bs, QDict
> *options, int flags,
> goto fail;
> }
>
> - ret = bdrv_pread(bs->file, s->l1_table_offset, s->l1_table,
> + ret = bdrv_pread(bs->file->bs, s->l1_table_offset, s->l1_table,
> s->l1_size * sizeof(uint64_t));
> if (ret < 0) {
> goto fail;
> @@ -205,7 +205,7 @@ static int qcow_open(BlockDriverState *bs, QDict
> *options, int flags,
>
> /* alloc L2 cache (max. 64k * 16 * 8 = 8 MB) */
> s->l2_cache =
> - qemu_try_blockalign(bs->file,
> + qemu_try_blockalign(bs->file->bs,
> s->l2_size * L2_CACHE_SIZE * sizeof(uint64_t));
> if (s->l2_cache == NULL) {
> error_setg(errp, "Could not allocate L2 table cache");
> @@ -224,7 +224,7 @@ static int qcow_open(BlockDriverState *bs, QDict
> *options, int flags,
> ret = -EINVAL;
> goto fail;
> }
> - ret = bdrv_pread(bs->file, header.backing_file_offset,
> + ret = bdrv_pread(bs->file->bs, header.backing_file_offset,
> bs->backing_file, len);
> if (ret < 0) {
> goto fail;
> @@ -369,13 +369,13 @@ static uint64_t get_cluster_offset(BlockDriverState *bs,
> if (!allocate)
> return 0;
> /* allocate a new l2 entry */
> - l2_offset = bdrv_getlength(bs->file);
> + l2_offset = bdrv_getlength(bs->file->bs);
> /* round to cluster size */
> l2_offset = (l2_offset + s->cluster_size - 1) & ~(s->cluster_size -
> 1);
> /* update the L1 entry */
> s->l1_table[l1_index] = l2_offset;
> tmp = cpu_to_be64(l2_offset);
> - if (bdrv_pwrite_sync(bs->file,
> + if (bdrv_pwrite_sync(bs->file->bs,
> s->l1_table_offset + l1_index * sizeof(tmp),
> &tmp, sizeof(tmp)) < 0)
> return 0;
> @@ -405,11 +405,12 @@ static uint64_t get_cluster_offset(BlockDriverState *bs,
> l2_table = s->l2_cache + (min_index << s->l2_bits);
> if (new_l2_table) {
> memset(l2_table, 0, s->l2_size * sizeof(uint64_t));
> - if (bdrv_pwrite_sync(bs->file, l2_offset, l2_table,
> + if (bdrv_pwrite_sync(bs->file->bs, l2_offset, l2_table,
> s->l2_size * sizeof(uint64_t)) < 0)
> return 0;
> } else {
> - if (bdrv_pread(bs->file, l2_offset, l2_table, s->l2_size *
> sizeof(uint64_t)) !=
> + if (bdrv_pread(bs->file->bs, l2_offset, l2_table,
> + s->l2_size * sizeof(uint64_t)) !=
> s->l2_size * sizeof(uint64_t))
> return 0;
> }
> @@ -430,20 +431,21 @@ static uint64_t get_cluster_offset(BlockDriverState *bs,
> overwritten */
> if (decompress_cluster(bs, cluster_offset) < 0)
> return 0;
> - cluster_offset = bdrv_getlength(bs->file);
> + cluster_offset = bdrv_getlength(bs->file->bs);
> cluster_offset = (cluster_offset + s->cluster_size - 1) &
> ~(s->cluster_size - 1);
> /* write the cluster content */
> - if (bdrv_pwrite(bs->file, cluster_offset, s->cluster_cache,
> s->cluster_size) !=
> + if (bdrv_pwrite(bs->file->bs, cluster_offset, s->cluster_cache,
> + s->cluster_size) !=
> s->cluster_size)
> return -1;
> } else {
> - cluster_offset = bdrv_getlength(bs->file);
> + cluster_offset = bdrv_getlength(bs->file->bs);
> if (allocate == 1) {
> /* round to cluster size */
> cluster_offset = (cluster_offset + s->cluster_size - 1) &
> ~(s->cluster_size - 1);
> - bdrv_truncate(bs->file, cluster_offset + s->cluster_size);
> + bdrv_truncate(bs->file->bs, cluster_offset +
> s->cluster_size);
> /* if encrypted, we must initialize the cluster
> content which won't be written */
> if (bs->encrypted &&
> @@ -463,7 +465,7 @@ static uint64_t get_cluster_offset(BlockDriverState *bs,
> errno = EIO;
> return -1;
> }
> - if (bdrv_pwrite(bs->file, cluster_offset + i *
> 512,
> + if (bdrv_pwrite(bs->file->bs, cluster_offset + i
> * 512,
> s->cluster_data, 512) != 512)
> return -1;
> }
> @@ -477,7 +479,7 @@ static uint64_t get_cluster_offset(BlockDriverState *bs,
> /* update L2 table */
> tmp = cpu_to_be64(cluster_offset);
> l2_table[l2_index] = tmp;
> - if (bdrv_pwrite_sync(bs->file, l2_offset + l2_index * sizeof(tmp),
> + if (bdrv_pwrite_sync(bs->file->bs, l2_offset + l2_index *
> sizeof(tmp),
> &tmp, sizeof(tmp)) < 0)
> return 0;
> }
> @@ -546,7 +548,7 @@ static int decompress_cluster(BlockDriverState *bs,
> uint64_t cluster_offset)
> if (s->cluster_cache_offset != coffset) {
> csize = cluster_offset >> (63 - s->cluster_bits);
> csize &= (s->cluster_size - 1);
> - ret = bdrv_pread(bs->file, coffset, s->cluster_data, csize);
> + ret = bdrv_pread(bs->file->bs, coffset, s->cluster_data, csize);
> if (ret != csize)
> return -1;
> if (decompress_buffer(s->cluster_cache, s->cluster_size,
> @@ -625,7 +627,7 @@ static coroutine_fn int qcow_co_readv(BlockDriverState
> *bs, int64_t sector_num,
> hd_iov.iov_len = n * 512;
> qemu_iovec_init_external(&hd_qiov, &hd_iov, 1);
> qemu_co_mutex_unlock(&s->lock);
> - ret = bdrv_co_readv(bs->file,
> + ret = bdrv_co_readv(bs->file->bs,
> (cluster_offset >> 9) + index_in_cluster,
> n, &hd_qiov);
> qemu_co_mutex_lock(&s->lock);
> @@ -727,7 +729,7 @@ static coroutine_fn int qcow_co_writev(BlockDriverState
> *bs, int64_t sector_num,
> hd_iov.iov_len = n * 512;
> qemu_iovec_init_external(&hd_qiov, &hd_iov, 1);
> qemu_co_mutex_unlock(&s->lock);
> - ret = bdrv_co_writev(bs->file,
> + ret = bdrv_co_writev(bs->file->bs,
> (cluster_offset >> 9) + index_in_cluster,
> n, &hd_qiov);
> qemu_co_mutex_lock(&s->lock);
> @@ -879,10 +881,10 @@ static int qcow_make_empty(BlockDriverState *bs)
> int ret;
>
> memset(s->l1_table, 0, l1_length);
> - if (bdrv_pwrite_sync(bs->file, s->l1_table_offset, s->l1_table,
> + if (bdrv_pwrite_sync(bs->file->bs, s->l1_table_offset, s->l1_table,
> l1_length) < 0)
> return -1;
> - ret = bdrv_truncate(bs->file, s->l1_table_offset + l1_length);
> + ret = bdrv_truncate(bs->file->bs, s->l1_table_offset + l1_length);
> if (ret < 0)
> return ret;
>
> @@ -962,7 +964,7 @@ static int qcow_write_compressed(BlockDriverState *bs,
> int64_t sector_num,
> }
>
> cluster_offset &= s->cluster_offset_mask;
> - ret = bdrv_pwrite(bs->file, cluster_offset, out_buf, out_len);
> + ret = bdrv_pwrite(bs->file->bs, cluster_offset, out_buf, out_len);
> if (ret < 0) {
> goto fail;
> }
> diff --git a/block/qcow2-cache.c b/block/qcow2-cache.c
> index 7b14c5c..86dd7f2 100644
> --- a/block/qcow2-cache.c
> +++ b/block/qcow2-cache.c
> @@ -127,7 +127,7 @@ Qcow2Cache *qcow2_cache_create(BlockDriverState *bs, int
> num_tables)
> c = g_new0(Qcow2Cache, 1);
> c->size = num_tables;
> c->entries = g_try_new0(Qcow2CachedTable, num_tables);
> - c->table_array = qemu_try_blockalign(bs->file,
> + c->table_array = qemu_try_blockalign(bs->file->bs,
> (size_t) num_tables *
> s->cluster_size);
>
> if (!c->entries || !c->table_array) {
> @@ -185,7 +185,7 @@ static int qcow2_cache_entry_flush(BlockDriverState *bs,
> Qcow2Cache *c, int i)
> if (c->depends) {
> ret = qcow2_cache_flush_dependency(bs, c);
> } else if (c->depends_on_flush) {
> - ret = bdrv_flush(bs->file);
> + ret = bdrv_flush(bs->file->bs);
> if (ret >= 0) {
> c->depends_on_flush = false;
> }
> @@ -216,7 +216,7 @@ static int qcow2_cache_entry_flush(BlockDriverState *bs,
> Qcow2Cache *c, int i)
> BLKDBG_EVENT(bs->file, BLKDBG_L2_UPDATE);
> }
>
> - ret = bdrv_pwrite(bs->file, c->entries[i].offset,
> + ret = bdrv_pwrite(bs->file->bs, c->entries[i].offset,
> qcow2_cache_get_table_addr(bs, c, i), s->cluster_size);
> if (ret < 0) {
> return ret;
> @@ -244,7 +244,7 @@ int qcow2_cache_flush(BlockDriverState *bs, Qcow2Cache *c)
> }
>
> if (result == 0) {
> - ret = bdrv_flush(bs->file);
> + ret = bdrv_flush(bs->file->bs);
> if (ret < 0) {
> result = ret;
> }
> @@ -356,7 +356,8 @@ static int qcow2_cache_do_get(BlockDriverState *bs,
> Qcow2Cache *c,
> BLKDBG_EVENT(bs->file, BLKDBG_L2_LOAD);
> }
>
> - ret = bdrv_pread(bs->file, offset, qcow2_cache_get_table_addr(bs, c,
> i),
> + ret = bdrv_pread(bs->file->bs, offset,
> + qcow2_cache_get_table_addr(bs, c, i),
> s->cluster_size);
> if (ret < 0) {
> return ret;
> diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c
> index 6ede629..7844f8e 100644
> --- a/block/qcow2-cluster.c
> +++ b/block/qcow2-cluster.c
> @@ -72,7 +72,7 @@ int qcow2_grow_l1_table(BlockDriverState *bs, uint64_t
> min_size,
> #endif
>
> new_l1_size2 = sizeof(uint64_t) * new_l1_size;
> - new_l1_table = qemu_try_blockalign(bs->file,
> + new_l1_table = qemu_try_blockalign(bs->file->bs,
> align_offset(new_l1_size2, 512));
> if (new_l1_table == NULL) {
> return -ENOMEM;
> @@ -105,7 +105,8 @@ int qcow2_grow_l1_table(BlockDriverState *bs, uint64_t
> min_size,
> BLKDBG_EVENT(bs->file, BLKDBG_L1_GROW_WRITE_TABLE);
> for(i = 0; i < s->l1_size; i++)
> new_l1_table[i] = cpu_to_be64(new_l1_table[i]);
> - ret = bdrv_pwrite_sync(bs->file, new_l1_table_offset, new_l1_table,
> new_l1_size2);
> + ret = bdrv_pwrite_sync(bs->file->bs, new_l1_table_offset,
> + new_l1_table, new_l1_size2);
> if (ret < 0)
> goto fail;
> for(i = 0; i < s->l1_size; i++)
> @@ -115,7 +116,8 @@ int qcow2_grow_l1_table(BlockDriverState *bs, uint64_t
> min_size,
> BLKDBG_EVENT(bs->file, BLKDBG_L1_GROW_ACTIVATE_TABLE);
> cpu_to_be32w((uint32_t*)data, new_l1_size);
> stq_be_p(data + 4, new_l1_table_offset);
> - ret = bdrv_pwrite_sync(bs->file, offsetof(QCowHeader, l1_size),
> data,sizeof(data));
> + ret = bdrv_pwrite_sync(bs->file->bs, offsetof(QCowHeader, l1_size),
> + data, sizeof(data));
> if (ret < 0) {
> goto fail;
> }
> @@ -182,8 +184,9 @@ int qcow2_write_l1_entry(BlockDriverState *bs, int
> l1_index)
> }
>
> BLKDBG_EVENT(bs->file, BLKDBG_L1_UPDATE);
> - ret = bdrv_pwrite_sync(bs->file, s->l1_table_offset + 8 * l1_start_index,
> - buf, sizeof(buf));
> + ret = bdrv_pwrite_sync(bs->file->bs,
> + s->l1_table_offset + 8 * l1_start_index,
> + buf, sizeof(buf));
> if (ret < 0) {
> return ret;
> }
> @@ -440,7 +443,8 @@ static int coroutine_fn copy_sectors(BlockDriverState *bs,
> }
>
> BLKDBG_EVENT(bs->file, BLKDBG_COW_WRITE);
> - ret = bdrv_co_writev(bs->file, (cluster_offset >> 9) + n_start, n,
> &qiov);
> + ret = bdrv_co_writev(bs->file->bs, (cluster_offset >> 9) + n_start, n,
> + &qiov);
> if (ret < 0) {
> goto out;
> }
> @@ -817,7 +821,7 @@ int qcow2_alloc_cluster_link_l2(BlockDriverState *bs,
> QCowL2Meta *m)
>
> /*
> * If this was a COW, we need to decrease the refcount of the old
> cluster.
> - * Also flush bs->file to get the right order for L2 and refcount update.
> + * Also flush bs->file->bs to get the right order for L2 and refcount
> update.
> *
> * Don't discard clusters that reach a refcount of 0 (e.g. compressed
> * clusters), the next write will reuse them anyway.
> @@ -1412,7 +1416,8 @@ int qcow2_decompress_cluster(BlockDriverState *bs,
> uint64_t cluster_offset)
> sector_offset = coffset & 511;
> csize = nb_csectors * 512 - sector_offset;
> BLKDBG_EVENT(bs->file, BLKDBG_READ_COMPRESSED);
> - ret = bdrv_read(bs->file, coffset >> 9, s->cluster_data,
> nb_csectors);
> + ret = bdrv_read(bs->file->bs, coffset >> 9, s->cluster_data,
> + nb_csectors);
> if (ret < 0) {
> return ret;
> }
> @@ -1645,7 +1650,7 @@ static int expand_zero_clusters_in_l1(BlockDriverState
> *bs, uint64_t *l1_table,
> if (!is_active_l1) {
> /* inactive L2 tables require a buffer to be stored in when loading
> * them from disk */
> - l2_table = qemu_try_blockalign(bs->file, s->cluster_size);
> + l2_table = qemu_try_blockalign(bs->file->bs, s->cluster_size);
> if (l2_table == NULL) {
> return -ENOMEM;
> }
> @@ -1679,8 +1684,8 @@ static int expand_zero_clusters_in_l1(BlockDriverState
> *bs, uint64_t *l1_table,
> (void **)&l2_table);
> } else {
> /* load inactive L2 tables from disk */
> - ret = bdrv_read(bs->file, l2_offset / BDRV_SECTOR_SIZE,
> - (void *)l2_table, s->cluster_sectors);
> + ret = bdrv_read(bs->file->bs, l2_offset / BDRV_SECTOR_SIZE,
> + (void *)l2_table, s->cluster_sectors);
> }
> if (ret < 0) {
> goto fail;
> @@ -1754,7 +1759,7 @@ static int expand_zero_clusters_in_l1(BlockDriverState
> *bs, uint64_t *l1_table,
> goto fail;
> }
>
> - ret = bdrv_write_zeroes(bs->file, offset / BDRV_SECTOR_SIZE,
> + ret = bdrv_write_zeroes(bs->file->bs, offset / BDRV_SECTOR_SIZE,
> s->cluster_sectors, 0);
> if (ret < 0) {
> if (!preallocated) {
> @@ -1787,8 +1792,8 @@ static int expand_zero_clusters_in_l1(BlockDriverState
> *bs, uint64_t *l1_table,
> goto fail;
> }
>
> - ret = bdrv_write(bs->file, l2_offset / BDRV_SECTOR_SIZE,
> - (void *)l2_table, s->cluster_sectors);
> + ret = bdrv_write(bs->file->bs, l2_offset / BDRV_SECTOR_SIZE,
> + (void *)l2_table, s->cluster_sectors);
> if (ret < 0) {
> goto fail;
> }
> @@ -1861,8 +1866,9 @@ int qcow2_expand_zero_clusters(BlockDriverState *bs,
>
> l1_table = g_realloc(l1_table, l1_sectors * BDRV_SECTOR_SIZE);
>
> - ret = bdrv_read(bs->file, s->snapshots[i].l1_table_offset /
> - BDRV_SECTOR_SIZE, (void *)l1_table, l1_sectors);
> + ret = bdrv_read(bs->file->bs,
> + s->snapshots[i].l1_table_offset / BDRV_SECTOR_SIZE,
> + (void *)l1_table, l1_sectors);
> if (ret < 0) {
> goto fail;
> }
> diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c
> index 2110839..4b81c8d 100644
> --- a/block/qcow2-refcount.c
> +++ b/block/qcow2-refcount.c
> @@ -101,7 +101,7 @@ int qcow2_refcount_init(BlockDriverState *bs)
> goto fail;
> }
> BLKDBG_EVENT(bs->file, BLKDBG_REFTABLE_LOAD);
> - ret = bdrv_pread(bs->file, s->refcount_table_offset,
> + ret = bdrv_pread(bs->file->bs, s->refcount_table_offset,
> s->refcount_table, refcount_table_size2);
> if (ret < 0) {
> goto fail;
> @@ -431,7 +431,7 @@ static int alloc_refcount_block(BlockDriverState *bs,
> if (refcount_table_index < s->refcount_table_size) {
> uint64_t data64 = cpu_to_be64(new_block);
> BLKDBG_EVENT(bs->file, BLKDBG_REFBLOCK_ALLOC_HOOKUP);
> - ret = bdrv_pwrite_sync(bs->file,
> + ret = bdrv_pwrite_sync(bs->file->bs,
> s->refcount_table_offset + refcount_table_index *
> sizeof(uint64_t),
> &data64, sizeof(data64));
> if (ret < 0) {
> @@ -535,7 +535,7 @@ static int alloc_refcount_block(BlockDriverState *bs,
>
> /* Write refcount blocks to disk */
> BLKDBG_EVENT(bs->file, BLKDBG_REFBLOCK_ALLOC_WRITE_BLOCKS);
> - ret = bdrv_pwrite_sync(bs->file, meta_offset, new_blocks,
> + ret = bdrv_pwrite_sync(bs->file->bs, meta_offset, new_blocks,
> blocks_clusters * s->cluster_size);
> g_free(new_blocks);
> new_blocks = NULL;
> @@ -549,7 +549,7 @@ static int alloc_refcount_block(BlockDriverState *bs,
> }
>
> BLKDBG_EVENT(bs->file, BLKDBG_REFBLOCK_ALLOC_WRITE_TABLE);
> - ret = bdrv_pwrite_sync(bs->file, table_offset, new_table,
> + ret = bdrv_pwrite_sync(bs->file->bs, table_offset, new_table,
> table_size * sizeof(uint64_t));
> if (ret < 0) {
> goto fail_table;
> @@ -564,8 +564,9 @@ static int alloc_refcount_block(BlockDriverState *bs,
> cpu_to_be64w((uint64_t*)data, table_offset);
> cpu_to_be32w((uint32_t*)(data + 8), table_clusters);
> BLKDBG_EVENT(bs->file, BLKDBG_REFBLOCK_ALLOC_SWITCH_TABLE);
> - ret = bdrv_pwrite_sync(bs->file, offsetof(QCowHeader,
> refcount_table_offset),
> - data, sizeof(data));
> + ret = bdrv_pwrite_sync(bs->file->bs,
> + offsetof(QCowHeader, refcount_table_offset),
> + data, sizeof(data));
> if (ret < 0) {
> goto fail_table;
> }
> @@ -613,7 +614,7 @@ void qcow2_process_discards(BlockDriverState *bs, int ret)
>
> /* Discard is optional, ignore the return value */
> if (ret >= 0) {
> - bdrv_discard(bs->file,
> + bdrv_discard(bs->file->bs,
> d->offset >> BDRV_SECTOR_BITS,
> d->bytes >> BDRV_SECTOR_BITS);
> }
> @@ -1068,7 +1069,7 @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs,
> }
> l1_allocated = true;
>
> - ret = bdrv_pread(bs->file, l1_table_offset, l1_table, l1_size2);
> + ret = bdrv_pread(bs->file->bs, l1_table_offset, l1_table, l1_size2);
> if (ret < 0) {
> goto fail;
> }
> @@ -1221,7 +1222,8 @@ fail:
> cpu_to_be64s(&l1_table[i]);
> }
>
> - ret = bdrv_pwrite_sync(bs->file, l1_table_offset, l1_table,
> l1_size2);
> + ret = bdrv_pwrite_sync(bs->file->bs, l1_table_offset,
> + l1_table, l1_size2);
>
> for (i = 0; i < l1_size; i++) {
> be64_to_cpus(&l1_table[i]);
> @@ -1376,7 +1378,7 @@ static int check_refcounts_l2(BlockDriverState *bs,
> BdrvCheckResult *res,
> l2_size = s->l2_size * sizeof(uint64_t);
> l2_table = g_malloc(l2_size);
>
> - ret = bdrv_pread(bs->file, l2_offset, l2_table, l2_size);
> + ret = bdrv_pread(bs->file->bs, l2_offset, l2_table, l2_size);
> if (ret < 0) {
> fprintf(stderr, "ERROR: I/O error in check_refcounts_l2\n");
> res->check_errors++;
> @@ -1508,7 +1510,7 @@ static int check_refcounts_l1(BlockDriverState *bs,
> res->check_errors++;
> goto fail;
> }
> - ret = bdrv_pread(bs->file, l1_table_offset, l1_table, l1_size2);
> + ret = bdrv_pread(bs->file->bs, l1_table_offset, l1_table, l1_size2);
> if (ret < 0) {
> fprintf(stderr, "ERROR: I/O error in check_refcounts_l1\n");
> res->check_errors++;
> @@ -1606,7 +1608,7 @@ static int check_oflag_copied(BlockDriverState *bs,
> BdrvCheckResult *res,
> }
> }
>
> - ret = bdrv_pread(bs->file, l2_offset, l2_table,
> + ret = bdrv_pread(bs->file->bs, l2_offset, l2_table,
> s->l2_size * sizeof(uint64_t));
> if (ret < 0) {
> fprintf(stderr, "ERROR: Could not read L2 table: %s\n",
> @@ -1658,7 +1660,8 @@ static int check_oflag_copied(BlockDriverState *bs,
> BdrvCheckResult *res,
> goto fail;
> }
>
> - ret = bdrv_pwrite(bs->file, l2_offset, l2_table,
> s->cluster_size);
> + ret = bdrv_pwrite(bs->file->bs, l2_offset, l2_table,
> + s->cluster_size);
> if (ret < 0) {
> fprintf(stderr, "ERROR: Could not write L2 table: %s\n",
> strerror(-ret));
> @@ -1713,11 +1716,11 @@ static int check_refblocks(BlockDriverState *bs,
> BdrvCheckResult *res,
> goto resize_fail;
> }
>
> - ret = bdrv_truncate(bs->file, offset + s->cluster_size);
> + ret = bdrv_truncate(bs->file->bs, offset + s->cluster_size);
> if (ret < 0) {
> goto resize_fail;
> }
> - size = bdrv_getlength(bs->file);
> + size = bdrv_getlength(bs->file->bs);
> if (size < 0) {
> ret = size;
> goto resize_fail;
> @@ -2091,7 +2094,7 @@ write_refblocks:
> on_disk_refblock = (void *)((char *) *refcount_table +
> refblock_index * s->cluster_size);
>
> - ret = bdrv_write(bs->file, refblock_offset / BDRV_SECTOR_SIZE,
> + ret = bdrv_write(bs->file->bs, refblock_offset / BDRV_SECTOR_SIZE,
> on_disk_refblock, s->cluster_sectors);
> if (ret < 0) {
> fprintf(stderr, "ERROR writing refblock: %s\n", strerror(-ret));
> @@ -2140,7 +2143,7 @@ write_refblocks:
> }
>
> assert(reftable_size < INT_MAX / sizeof(uint64_t));
> - ret = bdrv_pwrite(bs->file, reftable_offset, on_disk_reftable,
> + ret = bdrv_pwrite(bs->file->bs, reftable_offset, on_disk_reftable,
> reftable_size * sizeof(uint64_t));
> if (ret < 0) {
> fprintf(stderr, "ERROR writing reftable: %s\n", strerror(-ret));
> @@ -2152,8 +2155,8 @@ write_refblocks:
> reftable_offset);
> cpu_to_be32w(&reftable_offset_and_clusters.reftable_clusters,
> size_to_clusters(s, reftable_size * sizeof(uint64_t)));
> - ret = bdrv_pwrite_sync(bs->file, offsetof(QCowHeader,
> - refcount_table_offset),
> + ret = bdrv_pwrite_sync(bs->file->bs, offsetof(QCowHeader,
> + refcount_table_offset),
> &reftable_offset_and_clusters,
> sizeof(reftable_offset_and_clusters));
> if (ret < 0) {
> @@ -2191,7 +2194,7 @@ int qcow2_check_refcounts(BlockDriverState *bs,
> BdrvCheckResult *res,
> bool rebuild = false;
> int ret;
>
> - size = bdrv_getlength(bs->file);
> + size = bdrv_getlength(bs->file->bs);
> if (size < 0) {
> res->check_errors++;
> return size;
> @@ -2400,7 +2403,7 @@ int qcow2_check_metadata_overlap(BlockDriverState *bs,
> int ign, int64_t offset,
> return -ENOMEM;
> }
>
> - ret = bdrv_pread(bs->file, l1_ofs, l1, l1_sz2);
> + ret = bdrv_pread(bs->file->bs, l1_ofs, l1, l1_sz2);
> if (ret < 0) {
> g_free(l1);
> return ret;
> diff --git a/block/qcow2-snapshot.c b/block/qcow2-snapshot.c
> index 92f4dfc..def7201 100644
> --- a/block/qcow2-snapshot.c
> +++ b/block/qcow2-snapshot.c
> @@ -64,7 +64,7 @@ int qcow2_read_snapshots(BlockDriverState *bs)
> for(i = 0; i < s->nb_snapshots; i++) {
> /* Read statically sized part of the snapshot header */
> offset = align_offset(offset, 8);
> - ret = bdrv_pread(bs->file, offset, &h, sizeof(h));
> + ret = bdrv_pread(bs->file->bs, offset, &h, sizeof(h));
> if (ret < 0) {
> goto fail;
> }
> @@ -83,7 +83,7 @@ int qcow2_read_snapshots(BlockDriverState *bs)
> name_size = be16_to_cpu(h.name_size);
>
> /* Read extra data */
> - ret = bdrv_pread(bs->file, offset, &extra,
> + ret = bdrv_pread(bs->file->bs, offset, &extra,
> MIN(sizeof(extra), extra_data_size));
> if (ret < 0) {
> goto fail;
> @@ -102,7 +102,7 @@ int qcow2_read_snapshots(BlockDriverState *bs)
>
> /* Read snapshot ID */
> sn->id_str = g_malloc(id_str_size + 1);
> - ret = bdrv_pread(bs->file, offset, sn->id_str, id_str_size);
> + ret = bdrv_pread(bs->file->bs, offset, sn->id_str, id_str_size);
> if (ret < 0) {
> goto fail;
> }
> @@ -111,7 +111,7 @@ int qcow2_read_snapshots(BlockDriverState *bs)
>
> /* Read snapshot name */
> sn->name = g_malloc(name_size + 1);
> - ret = bdrv_pread(bs->file, offset, sn->name, name_size);
> + ret = bdrv_pread(bs->file->bs, offset, sn->name, name_size);
> if (ret < 0) {
> goto fail;
> }
> @@ -214,25 +214,25 @@ static int qcow2_write_snapshots(BlockDriverState *bs)
> h.name_size = cpu_to_be16(name_size);
> offset = align_offset(offset, 8);
>
> - ret = bdrv_pwrite(bs->file, offset, &h, sizeof(h));
> + ret = bdrv_pwrite(bs->file->bs, offset, &h, sizeof(h));
> if (ret < 0) {
> goto fail;
> }
> offset += sizeof(h);
>
> - ret = bdrv_pwrite(bs->file, offset, &extra, sizeof(extra));
> + ret = bdrv_pwrite(bs->file->bs, offset, &extra, sizeof(extra));
> if (ret < 0) {
> goto fail;
> }
> offset += sizeof(extra);
>
> - ret = bdrv_pwrite(bs->file, offset, sn->id_str, id_str_size);
> + ret = bdrv_pwrite(bs->file->bs, offset, sn->id_str, id_str_size);
> if (ret < 0) {
> goto fail;
> }
> offset += id_str_size;
>
> - ret = bdrv_pwrite(bs->file, offset, sn->name, name_size);
> + ret = bdrv_pwrite(bs->file->bs, offset, sn->name, name_size);
> if (ret < 0) {
> goto fail;
> }
> @@ -254,7 +254,7 @@ static int qcow2_write_snapshots(BlockDriverState *bs)
> header_data.nb_snapshots = cpu_to_be32(s->nb_snapshots);
> header_data.snapshots_offset = cpu_to_be64(snapshots_offset);
>
> - ret = bdrv_pwrite_sync(bs->file, offsetof(QCowHeader, nb_snapshots),
> + ret = bdrv_pwrite_sync(bs->file->bs, offsetof(QCowHeader, nb_snapshots),
> &header_data, sizeof(header_data));
> if (ret < 0) {
> goto fail;
> @@ -396,7 +396,7 @@ int qcow2_snapshot_create(BlockDriverState *bs,
> QEMUSnapshotInfo *sn_info)
> goto fail;
> }
>
> - ret = bdrv_pwrite(bs->file, sn->l1_table_offset, l1_table,
> + ret = bdrv_pwrite(bs->file->bs, sn->l1_table_offset, l1_table,
> s->l1_size * sizeof(uint64_t));
> if (ret < 0) {
> goto fail;
> @@ -509,7 +509,8 @@ int qcow2_snapshot_goto(BlockDriverState *bs, const char
> *snapshot_id)
> goto fail;
> }
>
> - ret = bdrv_pread(bs->file, sn->l1_table_offset, sn_l1_table,
> sn_l1_bytes);
> + ret = bdrv_pread(bs->file->bs, sn->l1_table_offset,
> + sn_l1_table, sn_l1_bytes);
> if (ret < 0) {
> goto fail;
> }
> @@ -526,7 +527,7 @@ int qcow2_snapshot_goto(BlockDriverState *bs, const char
> *snapshot_id)
> goto fail;
> }
>
> - ret = bdrv_pwrite_sync(bs->file, s->l1_table_offset, sn_l1_table,
> + ret = bdrv_pwrite_sync(bs->file->bs, s->l1_table_offset, sn_l1_table,
> cur_l1_bytes);
> if (ret < 0) {
> goto fail;
> @@ -706,13 +707,14 @@ int qcow2_snapshot_load_tmp(BlockDriverState *bs,
> return -EFBIG;
> }
> new_l1_bytes = sn->l1_size * sizeof(uint64_t);
> - new_l1_table = qemu_try_blockalign(bs->file,
> + new_l1_table = qemu_try_blockalign(bs->file->bs,
> align_offset(new_l1_bytes, 512));
> if (new_l1_table == NULL) {
> return -ENOMEM;
> }
>
> - ret = bdrv_pread(bs->file, sn->l1_table_offset, new_l1_table,
> new_l1_bytes);
> + ret = bdrv_pread(bs->file->bs, sn->l1_table_offset,
> + new_l1_table, new_l1_bytes);
> if (ret < 0) {
> error_setg(errp, "Failed to read l1 table for snapshot");
> qemu_vfree(new_l1_table);
> diff --git a/block/qcow2.c b/block/qcow2.c
> index 56ad808..38b2797 100644
> --- a/block/qcow2.c
> +++ b/block/qcow2.c
> @@ -104,7 +104,7 @@ static int qcow2_read_extensions(BlockDriverState *bs,
> uint64_t start_offset,
> printf("attempting to read extended header in offset %lu\n", offset);
> #endif
>
> - ret = bdrv_pread(bs->file, offset, &ext, sizeof(ext));
> + ret = bdrv_pread(bs->file->bs, offset, &ext, sizeof(ext));
> if (ret < 0) {
> error_setg_errno(errp, -ret, "qcow2_read_extension: ERROR: "
> "pread fail from offset %" PRIu64, offset);
> @@ -132,7 +132,7 @@ static int qcow2_read_extensions(BlockDriverState *bs,
> uint64_t start_offset,
> sizeof(bs->backing_format));
> return 2;
> }
> - ret = bdrv_pread(bs->file, offset, bs->backing_format, ext.len);
> + ret = bdrv_pread(bs->file->bs, offset, bs->backing_format,
> ext.len);
> if (ret < 0) {
> error_setg_errno(errp, -ret, "ERROR: ext_backing_format: "
> "Could not read format name");
> @@ -148,7 +148,7 @@ static int qcow2_read_extensions(BlockDriverState *bs,
> uint64_t start_offset,
> case QCOW2_EXT_MAGIC_FEATURE_TABLE:
> if (p_feature_table != NULL) {
> void* feature_table = g_malloc0(ext.len + 2 *
> sizeof(Qcow2Feature));
> - ret = bdrv_pread(bs->file, offset , feature_table, ext.len);
> + ret = bdrv_pread(bs->file->bs, offset , feature_table,
> ext.len);
> if (ret < 0) {
> error_setg_errno(errp, -ret, "ERROR: ext_feature_table: "
> "Could not read table");
> @@ -169,7 +169,7 @@ static int qcow2_read_extensions(BlockDriverState *bs,
> uint64_t start_offset,
> uext->len = ext.len;
> QLIST_INSERT_HEAD(&s->unknown_header_ext, uext, next);
>
> - ret = bdrv_pread(bs->file, offset , uext->data, uext->len);
> + ret = bdrv_pread(bs->file->bs, offset , uext->data,
> uext->len);
> if (ret < 0) {
> error_setg_errno(errp, -ret, "ERROR: unknown extension: "
> "Could not read data");
> @@ -260,12 +260,12 @@ int qcow2_mark_dirty(BlockDriverState *bs)
> }
>
> val = cpu_to_be64(s->incompatible_features | QCOW2_INCOMPAT_DIRTY);
> - ret = bdrv_pwrite(bs->file, offsetof(QCowHeader, incompatible_features),
> + ret = bdrv_pwrite(bs->file->bs, offsetof(QCowHeader,
> incompatible_features),
> &val, sizeof(val));
> if (ret < 0) {
> return ret;
> }
> - ret = bdrv_flush(bs->file);
> + ret = bdrv_flush(bs->file->bs);
> if (ret < 0) {
> return ret;
> }
> @@ -828,7 +828,7 @@ static int qcow2_open(BlockDriverState *bs, QDict
> *options, int flags,
> uint64_t ext_end;
> uint64_t l1_vm_state_index;
>
> - ret = bdrv_pread(bs->file, 0, &header, sizeof(header));
> + ret = bdrv_pread(bs->file->bs, 0, &header, sizeof(header));
> if (ret < 0) {
> error_setg_errno(errp, -ret, "Could not read qcow2 header");
> goto fail;
> @@ -903,7 +903,7 @@ static int qcow2_open(BlockDriverState *bs, QDict
> *options, int flags,
> if (header.header_length > sizeof(header)) {
> s->unknown_header_fields_size = header.header_length -
> sizeof(header);
> s->unknown_header_fields = g_malloc(s->unknown_header_fields_size);
> - ret = bdrv_pread(bs->file, sizeof(header), s->unknown_header_fields,
> + ret = bdrv_pread(bs->file->bs, sizeof(header),
> s->unknown_header_fields,
> s->unknown_header_fields_size);
> if (ret < 0) {
> error_setg_errno(errp, -ret, "Could not read unknown qcow2
> header "
> @@ -1056,14 +1056,14 @@ static int qcow2_open(BlockDriverState *bs, QDict
> *options, int flags,
>
>
> if (s->l1_size > 0) {
> - s->l1_table = qemu_try_blockalign(bs->file,
> + s->l1_table = qemu_try_blockalign(bs->file->bs,
> align_offset(s->l1_size * sizeof(uint64_t), 512));
> if (s->l1_table == NULL) {
> error_setg(errp, "Could not allocate L1 table");
> ret = -ENOMEM;
> goto fail;
> }
> - ret = bdrv_pread(bs->file, s->l1_table_offset, s->l1_table,
> + ret = bdrv_pread(bs->file->bs, s->l1_table_offset, s->l1_table,
> s->l1_size * sizeof(uint64_t));
> if (ret < 0) {
> error_setg_errno(errp, -ret, "Could not read L1 table");
> @@ -1082,7 +1082,7 @@ static int qcow2_open(BlockDriverState *bs, QDict
> *options, int flags,
>
> s->cluster_cache = g_malloc(s->cluster_size);
> /* one more sector for decompressed data alignment */
> - s->cluster_data = qemu_try_blockalign(bs->file, QCOW_MAX_CRYPT_CLUSTERS
> + s->cluster_data = qemu_try_blockalign(bs->file->bs,
> QCOW_MAX_CRYPT_CLUSTERS
> * s->cluster_size + 512);
> if (s->cluster_data == NULL) {
> error_setg(errp, "Could not allocate temporary cluster buffer");
> @@ -1119,7 +1119,7 @@ static int qcow2_open(BlockDriverState *bs, QDict
> *options, int flags,
> ret = -EINVAL;
> goto fail;
> }
> - ret = bdrv_pread(bs->file, header.backing_file_offset,
> + ret = bdrv_pread(bs->file->bs, header.backing_file_offset,
> bs->backing_file, len);
> if (ret < 0) {
> error_setg_errno(errp, -ret, "Could not read backing file name");
> @@ -1429,8 +1429,9 @@ static coroutine_fn int qcow2_co_readv(BlockDriverState
> *bs, int64_t sector_num,
> */
> if (!cluster_data) {
> cluster_data =
> - qemu_try_blockalign(bs->file, QCOW_MAX_CRYPT_CLUSTERS
> - * s->cluster_size);
> + qemu_try_blockalign(bs->file->bs,
> + QCOW_MAX_CRYPT_CLUSTERS
> + * s->cluster_size);
> if (cluster_data == NULL) {
> ret = -ENOMEM;
> goto fail;
> @@ -1446,7 +1447,7 @@ static coroutine_fn int qcow2_co_readv(BlockDriverState
> *bs, int64_t sector_num,
>
> BLKDBG_EVENT(bs->file, BLKDBG_READ_AIO);
> qemu_co_mutex_unlock(&s->lock);
> - ret = bdrv_co_readv(bs->file,
> + ret = bdrv_co_readv(bs->file->bs,
> (cluster_offset >> 9) + index_in_cluster,
> cur_nr_sectors, &hd_qiov);
> qemu_co_mutex_lock(&s->lock);
> @@ -1543,7 +1544,7 @@ static coroutine_fn int
> qcow2_co_writev(BlockDriverState *bs,
> Error *err = NULL;
> assert(s->cipher);
> if (!cluster_data) {
> - cluster_data = qemu_try_blockalign(bs->file,
> + cluster_data = qemu_try_blockalign(bs->file->bs,
> QCOW_MAX_CRYPT_CLUSTERS
> * s->cluster_size);
> if (cluster_data == NULL) {
> @@ -1580,7 +1581,7 @@ static coroutine_fn int
> qcow2_co_writev(BlockDriverState *bs,
> BLKDBG_EVENT(bs->file, BLKDBG_WRITE_AIO);
> trace_qcow2_writev_data(qemu_coroutine_self(),
> (cluster_offset >> 9) + index_in_cluster);
> - ret = bdrv_co_writev(bs->file,
> + ret = bdrv_co_writev(bs->file->bs,
> (cluster_offset >> 9) + index_in_cluster,
> cur_nr_sectors, &hd_qiov);
> qemu_co_mutex_lock(&s->lock);
> @@ -1703,7 +1704,7 @@ static void qcow2_invalidate_cache(BlockDriverState
> *bs, Error **errp)
>
> qcow2_close(bs);
>
> - bdrv_invalidate_cache(bs->file, &local_err);
> + bdrv_invalidate_cache(bs->file->bs, &local_err);
> if (local_err) {
> error_propagate(errp, local_err);
> return;
> @@ -1911,7 +1912,7 @@ int qcow2_update_header(BlockDriverState *bs)
> }
>
> /* Write the new header */
> - ret = bdrv_pwrite(bs->file, 0, header, s->cluster_size);
> + ret = bdrv_pwrite(bs->file->bs, 0, header, s->cluster_size);
> if (ret < 0) {
> goto fail;
> }
> @@ -1991,7 +1992,8 @@ static int preallocate(BlockDriverState *bs)
> if (host_offset != 0) {
> uint8_t buf[BDRV_SECTOR_SIZE];
> memset(buf, 0, BDRV_SECTOR_SIZE);
> - ret = bdrv_write(bs->file, (host_offset >> BDRV_SECTOR_BITS) + num -
> 1,
> + ret = bdrv_write(bs->file->bs,
> + (host_offset >> BDRV_SECTOR_BITS) + num - 1,
> buf, 1);
> if (ret < 0) {
> return ret;
> @@ -2403,7 +2405,7 @@ static int qcow2_truncate(BlockDriverState *bs, int64_t
> offset)
>
> /* write updated header.size */
> offset = cpu_to_be64(offset);
> - ret = bdrv_pwrite_sync(bs->file, offsetof(QCowHeader, size),
> + ret = bdrv_pwrite_sync(bs->file->bs, offsetof(QCowHeader, size),
> &offset, sizeof(uint64_t));
> if (ret < 0) {
> return ret;
> @@ -2427,8 +2429,8 @@ static int qcow2_write_compressed(BlockDriverState *bs,
> int64_t sector_num,
> if (nb_sectors == 0) {
> /* align end of file to a sector boundary to ease reading with
> sector based I/Os */
> - cluster_offset = bdrv_getlength(bs->file);
> - return bdrv_truncate(bs->file, cluster_offset);
> + cluster_offset = bdrv_getlength(bs->file->bs);
> + return bdrv_truncate(bs->file->bs, cluster_offset);
> }
>
> if (nb_sectors != s->cluster_sectors) {
> @@ -2495,7 +2497,7 @@ static int qcow2_write_compressed(BlockDriverState *bs,
> int64_t sector_num,
> }
>
> BLKDBG_EVENT(bs->file, BLKDBG_WRITE_COMPRESSED);
> - ret = bdrv_pwrite(bs->file, cluster_offset, out_buf, out_len);
> + ret = bdrv_pwrite(bs->file->bs, cluster_offset, out_buf, out_len);
> if (ret < 0) {
> goto fail;
> }
> @@ -2544,7 +2546,7 @@ static int make_completely_empty(BlockDriverState *bs)
> /* After this call, neither the in-memory nor the on-disk refcount
> * information accurately describe the actual references */
>
> - ret = bdrv_write_zeroes(bs->file, s->l1_table_offset / BDRV_SECTOR_SIZE,
> + ret = bdrv_write_zeroes(bs->file->bs, s->l1_table_offset /
> BDRV_SECTOR_SIZE,
> l1_clusters * s->cluster_sectors, 0);
> if (ret < 0) {
> goto fail_broken_refcounts;
> @@ -2558,7 +2560,7 @@ static int make_completely_empty(BlockDriverState *bs)
> * overwrite parts of the existing refcount and L1 table, which is not
> * an issue because the dirty flag is set, complete data loss is in fact
> * desired and partial data loss is consequently fine as well */
> - ret = bdrv_write_zeroes(bs->file, s->cluster_size / BDRV_SECTOR_SIZE,
> + ret = bdrv_write_zeroes(bs->file->bs, s->cluster_size / BDRV_SECTOR_SIZE,
> (2 + l1_clusters) * s->cluster_size /
> BDRV_SECTOR_SIZE, 0);
> /* This call (even if it failed overall) may have overwritten on-disk
> @@ -2578,7 +2580,7 @@ static int make_completely_empty(BlockDriverState *bs)
> cpu_to_be64w(&l1_ofs_rt_ofs_cls.l1_offset, 3 * s->cluster_size);
> cpu_to_be64w(&l1_ofs_rt_ofs_cls.reftable_offset, s->cluster_size);
> cpu_to_be32w(&l1_ofs_rt_ofs_cls.reftable_clusters, 1);
> - ret = bdrv_pwrite_sync(bs->file, offsetof(QCowHeader, l1_table_offset),
> + ret = bdrv_pwrite_sync(bs->file->bs, offsetof(QCowHeader,
> l1_table_offset),
> &l1_ofs_rt_ofs_cls, sizeof(l1_ofs_rt_ofs_cls));
> if (ret < 0) {
> goto fail_broken_refcounts;
> @@ -2609,7 +2611,7 @@ static int make_completely_empty(BlockDriverState *bs)
>
> /* Enter the first refblock into the reftable */
> rt_entry = cpu_to_be64(2 * s->cluster_size);
> - ret = bdrv_pwrite_sync(bs->file, s->cluster_size,
> + ret = bdrv_pwrite_sync(bs->file->bs, s->cluster_size,
> &rt_entry, sizeof(rt_entry));
> if (ret < 0) {
> goto fail_broken_refcounts;
> @@ -2634,7 +2636,7 @@ static int make_completely_empty(BlockDriverState *bs)
> goto fail;
> }
>
> - ret = bdrv_truncate(bs->file, (3 + l1_clusters) * s->cluster_size);
> + ret = bdrv_truncate(bs->file->bs, (3 + l1_clusters) * s->cluster_size);
> if (ret < 0) {
> goto fail;
> }
> @@ -2769,7 +2771,7 @@ static void dump_refcounts(BlockDriverState *bs)
> int64_t nb_clusters, k, k1, size;
> int refcount;
>
> - size = bdrv_getlength(bs->file);
> + size = bdrv_getlength(bs->file->bs);
> nb_clusters = size_to_clusters(s, size);
> for(k = 0; k < nb_clusters;) {
> k1 = k;
> diff --git a/block/qed-table.c b/block/qed-table.c
> index 513aa87..f4219b8 100644
> --- a/block/qed-table.c
> +++ b/block/qed-table.c
> @@ -63,7 +63,7 @@ static void qed_read_table(BDRVQEDState *s, uint64_t
> offset, QEDTable *table,
> read_table_cb->iov.iov_len = s->header.cluster_size *
> s->header.table_size,
>
> qemu_iovec_init_external(qiov, &read_table_cb->iov, 1);
> - bdrv_aio_readv(s->bs->file, offset / BDRV_SECTOR_SIZE, qiov,
> + bdrv_aio_readv(s->bs->file->bs, offset / BDRV_SECTOR_SIZE, qiov,
> qiov->size / BDRV_SECTOR_SIZE,
> qed_read_table_cb, read_table_cb);
> }
> @@ -152,7 +152,7 @@ static void qed_write_table(BDRVQEDState *s, uint64_t
> offset, QEDTable *table,
> /* Adjust for offset into table */
> offset += start * sizeof(uint64_t);
>
> - bdrv_aio_writev(s->bs->file, offset / BDRV_SECTOR_SIZE,
> + bdrv_aio_writev(s->bs->file->bs, offset / BDRV_SECTOR_SIZE,
> &write_table_cb->qiov,
> write_table_cb->qiov.size / BDRV_SECTOR_SIZE,
> qed_write_table_cb, write_table_cb);
> diff --git a/block/qed.c b/block/qed.c
> index a7ff1d9..d953f8c 100644
> --- a/block/qed.c
> +++ b/block/qed.c
> @@ -82,7 +82,7 @@ int qed_write_header_sync(BDRVQEDState *s)
> int ret;
>
> qed_header_cpu_to_le(&s->header, &le);
> - ret = bdrv_pwrite(s->bs->file, 0, &le, sizeof(le));
> + ret = bdrv_pwrite(s->bs->file->bs, 0, &le, sizeof(le));
> if (ret != sizeof(le)) {
> return ret;
> }
> @@ -119,7 +119,7 @@ static void qed_write_header_read_cb(void *opaque, int
> ret)
> /* Update header */
> qed_header_cpu_to_le(&s->header, (QEDHeader *)write_header_cb->buf);
>
> - bdrv_aio_writev(s->bs->file, 0, &write_header_cb->qiov,
> + bdrv_aio_writev(s->bs->file->bs, 0, &write_header_cb->qiov,
> write_header_cb->nsectors, qed_write_header_cb,
> write_header_cb);
> }
> @@ -152,7 +152,7 @@ static void qed_write_header(BDRVQEDState *s,
> BlockCompletionFunc cb,
> write_header_cb->iov.iov_len = len;
> qemu_iovec_init_external(&write_header_cb->qiov, &write_header_cb->iov,
> 1);
>
> - bdrv_aio_readv(s->bs->file, 0, &write_header_cb->qiov, nsectors,
> + bdrv_aio_readv(s->bs->file->bs, 0, &write_header_cb->qiov, nsectors,
> qed_write_header_read_cb, write_header_cb);
> }
>
> @@ -392,7 +392,7 @@ static int bdrv_qed_open(BlockDriverState *bs, QDict
> *options, int flags,
> s->bs = bs;
> QSIMPLEQ_INIT(&s->allocating_write_reqs);
>
> - ret = bdrv_pread(bs->file, 0, &le_header, sizeof(le_header));
> + ret = bdrv_pread(bs->file->bs, 0, &le_header, sizeof(le_header));
> if (ret < 0) {
> return ret;
> }
> @@ -416,7 +416,7 @@ static int bdrv_qed_open(BlockDriverState *bs, QDict
> *options, int flags,
> }
>
> /* Round down file size to the last cluster */
> - file_size = bdrv_getlength(bs->file);
> + file_size = bdrv_getlength(bs->file->bs);
> if (file_size < 0) {
> return file_size;
> }
> @@ -452,7 +452,7 @@ static int bdrv_qed_open(BlockDriverState *bs, QDict
> *options, int flags,
> return -EINVAL;
> }
>
> - ret = qed_read_string(bs->file, s->header.backing_filename_offset,
> + ret = qed_read_string(bs->file->bs,
> s->header.backing_filename_offset,
> s->header.backing_filename_size,
> bs->backing_file,
> sizeof(bs->backing_file));
> if (ret < 0) {
> @@ -471,7 +471,7 @@ static int bdrv_qed_open(BlockDriverState *bs, QDict
> *options, int flags,
> * feature is no longer valid.
> */
> if ((s->header.autoclear_features & ~QED_AUTOCLEAR_FEATURE_MASK) != 0 &&
> - !bdrv_is_read_only(bs->file) && !(flags & BDRV_O_INCOMING)) {
> + !bdrv_is_read_only(bs->file->bs) && !(flags & BDRV_O_INCOMING)) {
> s->header.autoclear_features &= QED_AUTOCLEAR_FEATURE_MASK;
>
> ret = qed_write_header_sync(s);
> @@ -480,7 +480,7 @@ static int bdrv_qed_open(BlockDriverState *bs, QDict
> *options, int flags,
> }
>
> /* From here on only known autoclear feature bits are valid */
> - bdrv_flush(bs->file);
> + bdrv_flush(bs->file->bs);
> }
>
> s->l1_table = qed_alloc_table(s);
> @@ -498,7 +498,7 @@ static int bdrv_qed_open(BlockDriverState *bs, QDict
> *options, int flags,
> * potentially inconsistent images to be opened read-only. This can
> * aid data recovery from an otherwise inconsistent image.
> */
> - if (!bdrv_is_read_only(bs->file) &&
> + if (!bdrv_is_read_only(bs->file->bs) &&
> !(flags & BDRV_O_INCOMING)) {
> BdrvCheckResult result = {0};
>
> @@ -541,7 +541,7 @@ static void bdrv_qed_close(BlockDriverState *bs)
> bdrv_qed_detach_aio_context(bs);
>
> /* Ensure writes reach stable storage */
> - bdrv_flush(bs->file);
> + bdrv_flush(bs->file->bs);
>
> /* Clean shutdown, no check required on next open */
> if (s->header.features & QED_F_NEED_CHECK) {
> @@ -839,7 +839,7 @@ static void qed_copy_from_backing_file_write(void
> *opaque, int ret)
> }
>
> BLKDBG_EVENT(s->bs->file, BLKDBG_COW_WRITE);
> - bdrv_aio_writev(s->bs->file, copy_cb->offset / BDRV_SECTOR_SIZE,
> + bdrv_aio_writev(s->bs->file->bs, copy_cb->offset / BDRV_SECTOR_SIZE,
> ©_cb->qiov, copy_cb->qiov.size / BDRV_SECTOR_SIZE,
> qed_copy_from_backing_file_cb, copy_cb);
> }
> @@ -1055,7 +1055,7 @@ static void qed_aio_write_flush_before_l2_update(void
> *opaque, int ret)
> QEDAIOCB *acb = opaque;
> BDRVQEDState *s = acb_to_s(acb);
>
> - if (!bdrv_aio_flush(s->bs->file, qed_aio_write_l2_update_cb, opaque)) {
> + if (!bdrv_aio_flush(s->bs->file->bs, qed_aio_write_l2_update_cb,
> opaque)) {
> qed_aio_complete(acb, -EIO);
> }
> }
> @@ -1089,7 +1089,7 @@ static void qed_aio_write_main(void *opaque, int ret)
> }
>
> BLKDBG_EVENT(s->bs->file, BLKDBG_WRITE_AIO);
> - bdrv_aio_writev(s->bs->file, offset / BDRV_SECTOR_SIZE,
> + bdrv_aio_writev(s->bs->file->bs, offset / BDRV_SECTOR_SIZE,
> &acb->cur_qiov, acb->cur_qiov.size / BDRV_SECTOR_SIZE,
> next_fn, acb);
> }
> @@ -1321,7 +1321,7 @@ static void qed_aio_read_data(void *opaque, int ret,
> }
>
> BLKDBG_EVENT(bs->file, BLKDBG_READ_AIO);
> - bdrv_aio_readv(bs->file, offset / BDRV_SECTOR_SIZE,
> + bdrv_aio_readv(bs->file->bs, offset / BDRV_SECTOR_SIZE,
> &acb->cur_qiov, acb->cur_qiov.size / BDRV_SECTOR_SIZE,
> qed_aio_next_io, acb);
> return;
> @@ -1580,7 +1580,7 @@ static int
> bdrv_qed_change_backing_file(BlockDriverState *bs,
> }
>
> /* Write new header */
> - ret = bdrv_pwrite_sync(bs->file, 0, buffer, buffer_len);
> + ret = bdrv_pwrite_sync(bs->file->bs, 0, buffer, buffer_len);
> g_free(buffer);
> if (ret == 0) {
> memcpy(&s->header, &new_header, sizeof(new_header));
> @@ -1596,7 +1596,7 @@ static void bdrv_qed_invalidate_cache(BlockDriverState
> *bs, Error **errp)
>
> bdrv_qed_close(bs);
>
> - bdrv_invalidate_cache(bs->file, &local_err);
> + bdrv_invalidate_cache(bs->file->bs, &local_err);
> if (local_err) {
> error_propagate(errp, local_err);
> return;
> diff --git a/block/raw_bsd.c b/block/raw_bsd.c
> index e3d2d04..63ee911 100644
> --- a/block/raw_bsd.c
> +++ b/block/raw_bsd.c
> @@ -52,7 +52,7 @@ static int coroutine_fn raw_co_readv(BlockDriverState *bs,
> int64_t sector_num,
> int nb_sectors, QEMUIOVector *qiov)
> {
> BLKDBG_EVENT(bs->file, BLKDBG_READ_AIO);
> - return bdrv_co_readv(bs->file, sector_num, nb_sectors, qiov);
> + return bdrv_co_readv(bs->file->bs, sector_num, nb_sectors, qiov);
> }
>
> static int coroutine_fn raw_co_writev(BlockDriverState *bs, int64_t
> sector_num,
> @@ -75,7 +75,7 @@ static int coroutine_fn raw_co_writev(BlockDriverState *bs,
> int64_t sector_num,
> return 0;
> }
>
> - buf = qemu_try_blockalign(bs->file, 512);
> + buf = qemu_try_blockalign(bs->file->bs, 512);
> if (!buf) {
> ret = -ENOMEM;
> goto fail;
> @@ -102,7 +102,7 @@ static int coroutine_fn raw_co_writev(BlockDriverState
> *bs, int64_t sector_num,
> }
>
> BLKDBG_EVENT(bs->file, BLKDBG_WRITE_AIO);
> - ret = bdrv_co_writev(bs->file, sector_num, nb_sectors, qiov);
> + ret = bdrv_co_writev(bs->file->bs, sector_num, nb_sectors, qiov);
>
> fail:
> if (qiov == &local_qiov) {
> @@ -125,58 +125,58 @@ static int coroutine_fn
> raw_co_write_zeroes(BlockDriverState *bs,
> int64_t sector_num, int
> nb_sectors,
> BdrvRequestFlags flags)
> {
> - return bdrv_co_write_zeroes(bs->file, sector_num, nb_sectors, flags);
> + return bdrv_co_write_zeroes(bs->file->bs, sector_num, nb_sectors, flags);
> }
>
> static int coroutine_fn raw_co_discard(BlockDriverState *bs,
> int64_t sector_num, int nb_sectors)
> {
> - return bdrv_co_discard(bs->file, sector_num, nb_sectors);
> + return bdrv_co_discard(bs->file->bs, sector_num, nb_sectors);
> }
>
> static int64_t raw_getlength(BlockDriverState *bs)
> {
> - return bdrv_getlength(bs->file);
> + return bdrv_getlength(bs->file->bs);
> }
>
> static int raw_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
> {
> - return bdrv_get_info(bs->file, bdi);
> + return bdrv_get_info(bs->file->bs, bdi);
> }
>
> static void raw_refresh_limits(BlockDriverState *bs, Error **errp)
> {
> - bs->bl = bs->file->bl;
> + bs->bl = bs->file->bs->bl;
> }
>
> static int raw_truncate(BlockDriverState *bs, int64_t offset)
> {
> - return bdrv_truncate(bs->file, offset);
> + return bdrv_truncate(bs->file->bs, offset);
> }
>
> static int raw_is_inserted(BlockDriverState *bs)
> {
> - return bdrv_is_inserted(bs->file);
> + return bdrv_is_inserted(bs->file->bs);
> }
>
> static int raw_media_changed(BlockDriverState *bs)
> {
> - return bdrv_media_changed(bs->file);
> + return bdrv_media_changed(bs->file->bs);
> }
>
> static void raw_eject(BlockDriverState *bs, bool eject_flag)
> {
> - bdrv_eject(bs->file, eject_flag);
> + bdrv_eject(bs->file->bs, eject_flag);
> }
>
> static void raw_lock_medium(BlockDriverState *bs, bool locked)
> {
> - bdrv_lock_medium(bs->file, locked);
> + bdrv_lock_medium(bs->file->bs, locked);
> }
>
> static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
> {
> - return bdrv_ioctl(bs->file, req, buf);
> + return bdrv_ioctl(bs->file->bs, req, buf);
> }
>
> static BlockAIOCB *raw_aio_ioctl(BlockDriverState *bs,
> @@ -184,12 +184,12 @@ static BlockAIOCB *raw_aio_ioctl(BlockDriverState *bs,
> BlockCompletionFunc *cb,
> void *opaque)
> {
> - return bdrv_aio_ioctl(bs->file, req, buf, cb, opaque);
> + return bdrv_aio_ioctl(bs->file->bs, req, buf, cb, opaque);
> }
>
> static int raw_has_zero_init(BlockDriverState *bs)
> {
> - return bdrv_has_zero_init(bs->file);
> + return bdrv_has_zero_init(bs->file->bs);
> }
>
> static int raw_create(const char *filename, QemuOpts *opts, Error **errp)
> @@ -207,7 +207,7 @@ static int raw_create(const char *filename, QemuOpts
> *opts, Error **errp)
> static int raw_open(BlockDriverState *bs, QDict *options, int flags,
> Error **errp)
> {
> - bs->sg = bs->file->sg;
> + bs->sg = bs->file->bs->sg;
>
> if (bs->probed && !bdrv_is_read_only(bs)) {
> fprintf(stderr,
> @@ -217,7 +217,7 @@ static int raw_open(BlockDriverState *bs, QDict *options,
> int flags,
> "raw images, write operations on block 0 will be
> restricted.\n"
> " Specify the 'raw' format explicitly to remove the "
> "restrictions.\n",
> - bs->file->filename);
> + bs->file->bs->filename);
> }
>
> return 0;
> @@ -237,12 +237,12 @@ static int raw_probe(const uint8_t *buf, int buf_size,
> const char *filename)
>
> static int raw_probe_blocksizes(BlockDriverState *bs, BlockSizes *bsz)
> {
> - return bdrv_probe_blocksizes(bs->file, bsz);
> + return bdrv_probe_blocksizes(bs->file->bs, bsz);
> }
>
> static int raw_probe_geometry(BlockDriverState *bs, HDGeometry *geo)
> {
> - return bdrv_probe_geometry(bs->file, geo);
> + return bdrv_probe_geometry(bs->file->bs, geo);
> }
>
> BlockDriver bdrv_raw = {
> diff --git a/block/snapshot.c b/block/snapshot.c
> index 49e143e..89500f2 100644
> --- a/block/snapshot.c
> +++ b/block/snapshot.c
> @@ -149,7 +149,7 @@ int bdrv_can_snapshot(BlockDriverState *bs)
>
> if (!drv->bdrv_snapshot_create) {
> if (bs->file != NULL) {
> - return bdrv_can_snapshot(bs->file);
> + return bdrv_can_snapshot(bs->file->bs);
> }
> return 0;
> }
> @@ -168,7 +168,7 @@ int bdrv_snapshot_create(BlockDriverState *bs,
> return drv->bdrv_snapshot_create(bs, sn_info);
> }
> if (bs->file) {
> - return bdrv_snapshot_create(bs->file, sn_info);
> + return bdrv_snapshot_create(bs->file->bs, sn_info);
> }
> return -ENOTSUP;
> }
> @@ -188,10 +188,10 @@ int bdrv_snapshot_goto(BlockDriverState *bs,
>
> if (bs->file) {
> drv->bdrv_close(bs);
> - ret = bdrv_snapshot_goto(bs->file, snapshot_id);
> + ret = bdrv_snapshot_goto(bs->file->bs, snapshot_id);
> open_ret = drv->bdrv_open(bs, NULL, bs->open_flags, NULL);
> if (open_ret < 0) {
> - bdrv_unref(bs->file);
> + bdrv_unref(bs->file->bs);
> bs->drv = NULL;
> return open_ret;
> }
> @@ -245,7 +245,7 @@ int bdrv_snapshot_delete(BlockDriverState *bs,
> return drv->bdrv_snapshot_delete(bs, snapshot_id, name, errp);
> }
> if (bs->file) {
> - return bdrv_snapshot_delete(bs->file, snapshot_id, name, errp);
> + return bdrv_snapshot_delete(bs->file->bs, snapshot_id, name, errp);
> }
> error_setg(errp, "Block format '%s' used by device '%s' "
> "does not support internal snapshot deletion",
> @@ -283,7 +283,7 @@ int bdrv_snapshot_list(BlockDriverState *bs,
> return drv->bdrv_snapshot_list(bs, psn_info);
> }
> if (bs->file) {
> - return bdrv_snapshot_list(bs->file, psn_info);
> + return bdrv_snapshot_list(bs->file->bs, psn_info);
> }
> return -ENOTSUP;
> }
> diff --git a/block/vdi.c b/block/vdi.c
> index 062a654..17626d4 100644
> --- a/block/vdi.c
> +++ b/block/vdi.c
> @@ -399,7 +399,7 @@ static int vdi_open(BlockDriverState *bs, QDict *options,
> int flags,
>
> logout("\n");
>
> - ret = bdrv_read(bs->file, 0, (uint8_t *)&header, 1);
> + ret = bdrv_read(bs->file->bs, 0, (uint8_t *)&header, 1);
> if (ret < 0) {
> goto fail;
> }
> @@ -490,13 +490,14 @@ static int vdi_open(BlockDriverState *bs, QDict
> *options, int flags,
>
> bmap_size = header.blocks_in_image * sizeof(uint32_t);
> bmap_size = DIV_ROUND_UP(bmap_size, SECTOR_SIZE);
> - s->bmap = qemu_try_blockalign(bs->file, bmap_size * SECTOR_SIZE);
> + s->bmap = qemu_try_blockalign(bs->file->bs, bmap_size * SECTOR_SIZE);
> if (s->bmap == NULL) {
> ret = -ENOMEM;
> goto fail;
> }
>
> - ret = bdrv_read(bs->file, s->bmap_sector, (uint8_t *)s->bmap, bmap_size);
> + ret = bdrv_read(bs->file->bs, s->bmap_sector, (uint8_t *)s->bmap,
> + bmap_size);
> if (ret < 0) {
> goto fail_free_bmap;
> }
> @@ -585,7 +586,7 @@ static int vdi_co_read(BlockDriverState *bs,
> uint64_t offset = s->header.offset_data / SECTOR_SIZE +
> (uint64_t)bmap_entry * s->block_sectors +
> sector_in_block;
> - ret = bdrv_read(bs->file, offset, buf, n_sectors);
> + ret = bdrv_read(bs->file->bs, offset, buf, n_sectors);
> }
> logout("%u sectors read\n", n_sectors);
>
> @@ -653,7 +654,7 @@ static int vdi_co_write(BlockDriverState *bs,
> * acquire the lock and thus the padded cluster is written before
> * the other coroutines can write to the affected area. */
> qemu_co_mutex_lock(&s->write_lock);
> - ret = bdrv_write(bs->file, offset, block, s->block_sectors);
> + ret = bdrv_write(bs->file->bs, offset, block, s->block_sectors);
> qemu_co_mutex_unlock(&s->write_lock);
> } else {
> uint64_t offset = s->header.offset_data / SECTOR_SIZE +
> @@ -669,7 +670,7 @@ static int vdi_co_write(BlockDriverState *bs,
> * that that write operation has returned (there may be other
> writes
> * in flight, but they do not concern this very operation). */
> qemu_co_mutex_unlock(&s->write_lock);
> - ret = bdrv_write(bs->file, offset, buf, n_sectors);
> + ret = bdrv_write(bs->file->bs, offset, buf, n_sectors);
> }
>
> nb_sectors -= n_sectors;
> @@ -694,7 +695,7 @@ static int vdi_co_write(BlockDriverState *bs,
> assert(VDI_IS_ALLOCATED(bmap_first));
> *header = s->header;
> vdi_header_to_le(header);
> - ret = bdrv_write(bs->file, 0, block, 1);
> + ret = bdrv_write(bs->file->bs, 0, block, 1);
> g_free(block);
> block = NULL;
>
> @@ -712,7 +713,7 @@ static int vdi_co_write(BlockDriverState *bs,
> base = ((uint8_t *)&s->bmap[0]) + bmap_first * SECTOR_SIZE;
> logout("will write %u block map sectors starting from entry %u\n",
> n_sectors, bmap_first);
> - ret = bdrv_write(bs->file, offset, base, n_sectors);
> + ret = bdrv_write(bs->file->bs, offset, base, n_sectors);
> }
>
> return ret;
> diff --git a/block/vhdx-log.c b/block/vhdx-log.c
> index 47fec63..47ae4b1 100644
> --- a/block/vhdx-log.c
> +++ b/block/vhdx-log.c
> @@ -81,7 +81,7 @@ static int vhdx_log_peek_hdr(BlockDriverState *bs,
> VHDXLogEntries *log,
>
> offset = log->offset + read;
>
> - ret = bdrv_pread(bs->file, offset, hdr, sizeof(VHDXLogEntryHeader));
> + ret = bdrv_pread(bs->file->bs, offset, hdr, sizeof(VHDXLogEntryHeader));
> if (ret < 0) {
> goto exit;
> }
> @@ -141,7 +141,7 @@ static int vhdx_log_read_sectors(BlockDriverState *bs,
> VHDXLogEntries *log,
> }
> offset = log->offset + read;
>
> - ret = bdrv_pread(bs->file, offset, buffer, VHDX_LOG_SECTOR_SIZE);
> + ret = bdrv_pread(bs->file->bs, offset, buffer, VHDX_LOG_SECTOR_SIZE);
> if (ret < 0) {
> goto exit;
> }
> @@ -191,7 +191,8 @@ static int vhdx_log_write_sectors(BlockDriverState *bs,
> VHDXLogEntries *log,
> /* full */
> break;
> }
> - ret = bdrv_pwrite(bs->file, offset, buffer_tmp,
> VHDX_LOG_SECTOR_SIZE);
> + ret = bdrv_pwrite(bs->file->bs, offset, buffer_tmp,
> + VHDX_LOG_SECTOR_SIZE);
> if (ret < 0) {
> goto exit;
> }
> @@ -353,7 +354,7 @@ static int vhdx_log_read_desc(BlockDriverState *bs,
> BDRVVHDXState *s,
> }
>
> desc_sectors = vhdx_compute_desc_sectors(hdr.descriptor_count);
> - desc_entries = qemu_try_blockalign(bs->file,
> + desc_entries = qemu_try_blockalign(bs->file->bs,
> desc_sectors * VHDX_LOG_SECTOR_SIZE);
> if (desc_entries == NULL) {
> ret = -ENOMEM;
> @@ -462,7 +463,7 @@ static int vhdx_log_flush_desc(BlockDriverState *bs,
> VHDXLogDescriptor *desc,
>
> /* count is only > 1 if we are writing zeroes */
> for (i = 0; i < count; i++) {
> - ret = bdrv_pwrite_sync(bs->file, file_offset, buffer,
> + ret = bdrv_pwrite_sync(bs->file->bs, file_offset, buffer,
> VHDX_LOG_SECTOR_SIZE);
> if (ret < 0) {
> goto exit;
> @@ -509,7 +510,7 @@ static int vhdx_log_flush(BlockDriverState *bs,
> BDRVVHDXState *s,
> /* if the log shows a FlushedFileOffset larger than our current file
> * size, then that means the file has been truncated / corrupted, and
> * we must refused to open it / use it */
> - if (hdr_tmp.flushed_file_offset > bdrv_getlength(bs->file)) {
> + if (hdr_tmp.flushed_file_offset > bdrv_getlength(bs->file->bs)) {
> ret = -EINVAL;
> goto exit;
> }
> @@ -539,12 +540,12 @@ static int vhdx_log_flush(BlockDriverState *bs,
> BDRVVHDXState *s,
> goto exit;
> }
> }
> - if (bdrv_getlength(bs->file) < desc_entries->hdr.last_file_offset) {
> + if (bdrv_getlength(bs->file->bs) <
> desc_entries->hdr.last_file_offset) {
> new_file_size = desc_entries->hdr.last_file_offset;
> if (new_file_size % (1024*1024)) {
> /* round up to nearest 1MB boundary */
> new_file_size = ((new_file_size >> 20) + 1) << 20;
> - bdrv_truncate(bs->file, new_file_size);
> + bdrv_truncate(bs->file->bs, new_file_size);
> }
> }
> qemu_vfree(desc_entries);
> @@ -908,8 +909,8 @@ static int vhdx_log_write(BlockDriverState *bs,
> BDRVVHDXState *s,
> .sequence_number = s->log.sequence,
> .descriptor_count = sectors,
> .reserved = 0,
> - .flushed_file_offset = bdrv_getlength(bs->file),
> - .last_file_offset = bdrv_getlength(bs->file),
> + .flushed_file_offset = bdrv_getlength(bs->file->bs),
> + .last_file_offset = bdrv_getlength(bs->file->bs),
> };
>
> new_hdr.log_guid = header->log_guid;
> @@ -940,7 +941,7 @@ static int vhdx_log_write(BlockDriverState *bs,
> BDRVVHDXState *s,
>
> if (i == 0 && leading_length) {
> /* partial sector at the front of the buffer */
> - ret = bdrv_pread(bs->file, file_offset, merged_sector,
> + ret = bdrv_pread(bs->file->bs, file_offset, merged_sector,
> VHDX_LOG_SECTOR_SIZE);
> if (ret < 0) {
> goto exit;
> @@ -950,7 +951,7 @@ static int vhdx_log_write(BlockDriverState *bs,
> BDRVVHDXState *s,
> sector_write = merged_sector;
> } else if (i == sectors - 1 && trailing_length) {
> /* partial sector at the end of the buffer */
> - ret = bdrv_pread(bs->file,
> + ret = bdrv_pread(bs->file->bs,
> file_offset,
> merged_sector + trailing_length,
> VHDX_LOG_SECTOR_SIZE - trailing_length);
> diff --git a/block/vhdx.c b/block/vhdx.c
> index d3bb1bd..2fe9a5e 100644
> --- a/block/vhdx.c
> +++ b/block/vhdx.c
> @@ -375,7 +375,7 @@ static int vhdx_update_header(BlockDriverState *bs,
> BDRVVHDXState *s,
> inactive_header->log_guid = *log_guid;
> }
>
> - ret = vhdx_write_header(bs->file, inactive_header, header_offset, true);
> + ret = vhdx_write_header(bs->file->bs, inactive_header, header_offset,
> true);
> if (ret < 0) {
> goto exit;
> }
> @@ -427,7 +427,8 @@ static void vhdx_parse_header(BlockDriverState *bs,
> BDRVVHDXState *s,
> /* We have to read the whole VHDX_HEADER_SIZE instead of
> * sizeof(VHDXHeader), because the checksum is over the whole
> * region */
> - ret = bdrv_pread(bs->file, VHDX_HEADER1_OFFSET, buffer,
> VHDX_HEADER_SIZE);
> + ret = bdrv_pread(bs->file->bs, VHDX_HEADER1_OFFSET, buffer,
> + VHDX_HEADER_SIZE);
> if (ret < 0) {
> goto fail;
> }
> @@ -443,7 +444,8 @@ static void vhdx_parse_header(BlockDriverState *bs,
> BDRVVHDXState *s,
> }
> }
>
> - ret = bdrv_pread(bs->file, VHDX_HEADER2_OFFSET, buffer,
> VHDX_HEADER_SIZE);
> + ret = bdrv_pread(bs->file->bs, VHDX_HEADER2_OFFSET, buffer,
> + VHDX_HEADER_SIZE);
> if (ret < 0) {
> goto fail;
> }
> @@ -516,7 +518,7 @@ static int vhdx_open_region_tables(BlockDriverState *bs,
> BDRVVHDXState *s)
> * whole block */
> buffer = qemu_blockalign(bs, VHDX_HEADER_BLOCK_SIZE);
>
> - ret = bdrv_pread(bs->file, VHDX_REGION_TABLE_OFFSET, buffer,
> + ret = bdrv_pread(bs->file->bs, VHDX_REGION_TABLE_OFFSET, buffer,
> VHDX_HEADER_BLOCK_SIZE);
> if (ret < 0) {
> goto fail;
> @@ -629,7 +631,7 @@ static int vhdx_parse_metadata(BlockDriverState *bs,
> BDRVVHDXState *s)
>
> buffer = qemu_blockalign(bs, VHDX_METADATA_TABLE_MAX_SIZE);
>
> - ret = bdrv_pread(bs->file, s->metadata_rt.file_offset, buffer,
> + ret = bdrv_pread(bs->file->bs, s->metadata_rt.file_offset, buffer,
> VHDX_METADATA_TABLE_MAX_SIZE);
> if (ret < 0) {
> goto exit;
> @@ -732,7 +734,7 @@ static int vhdx_parse_metadata(BlockDriverState *bs,
> BDRVVHDXState *s)
> goto exit;
> }
>
> - ret = bdrv_pread(bs->file,
> + ret = bdrv_pread(bs->file->bs,
> s->metadata_entries.file_parameters_entry.offset
> + s->metadata_rt.file_offset,
> &s->params,
> @@ -767,7 +769,7 @@ static int vhdx_parse_metadata(BlockDriverState *bs,
> BDRVVHDXState *s)
> /* determine virtual disk size, logical sector size,
> * and phys sector size */
>
> - ret = bdrv_pread(bs->file,
> + ret = bdrv_pread(bs->file->bs,
> s->metadata_entries.virtual_disk_size_entry.offset
> + s->metadata_rt.file_offset,
> &s->virtual_disk_size,
> @@ -775,7 +777,7 @@ static int vhdx_parse_metadata(BlockDriverState *bs,
> BDRVVHDXState *s)
> if (ret < 0) {
> goto exit;
> }
> - ret = bdrv_pread(bs->file,
> + ret = bdrv_pread(bs->file->bs,
> s->metadata_entries.logical_sector_size_entry.offset
> + s->metadata_rt.file_offset,
> &s->logical_sector_size,
> @@ -783,7 +785,7 @@ static int vhdx_parse_metadata(BlockDriverState *bs,
> BDRVVHDXState *s)
> if (ret < 0) {
> goto exit;
> }
> - ret = bdrv_pread(bs->file,
> + ret = bdrv_pread(bs->file->bs,
> s->metadata_entries.phys_sector_size_entry.offset
> + s->metadata_rt.file_offset,
> &s->physical_sector_size,
> @@ -906,7 +908,7 @@ static int vhdx_open(BlockDriverState *bs, QDict
> *options, int flags,
> QLIST_INIT(&s->regions);
>
> /* validate the file signature */
> - ret = bdrv_pread(bs->file, 0, &signature, sizeof(uint64_t));
> + ret = bdrv_pread(bs->file->bs, 0, &signature, sizeof(uint64_t));
> if (ret < 0) {
> goto fail;
> }
> @@ -959,13 +961,13 @@ static int vhdx_open(BlockDriverState *bs, QDict
> *options, int flags,
> }
>
> /* s->bat is freed in vhdx_close() */
> - s->bat = qemu_try_blockalign(bs->file, s->bat_rt.length);
> + s->bat = qemu_try_blockalign(bs->file->bs, s->bat_rt.length);
> if (s->bat == NULL) {
> ret = -ENOMEM;
> goto fail;
> }
>
> - ret = bdrv_pread(bs->file, s->bat_offset, s->bat, s->bat_rt.length);
> + ret = bdrv_pread(bs->file->bs, s->bat_offset, s->bat, s->bat_rt.length);
> if (ret < 0) {
> goto fail;
> }
> @@ -1118,7 +1120,7 @@ static coroutine_fn int vhdx_co_readv(BlockDriverState
> *bs, int64_t sector_num,
> break;
> case PAYLOAD_BLOCK_FULLY_PRESENT:
> qemu_co_mutex_unlock(&s->lock);
> - ret = bdrv_co_readv(bs->file,
> + ret = bdrv_co_readv(bs->file->bs,
> sinfo.file_offset >> BDRV_SECTOR_BITS,
> sinfo.sectors_avail, &hd_qiov);
> qemu_co_mutex_lock(&s->lock);
> @@ -1156,12 +1158,12 @@ exit:
> static int vhdx_allocate_block(BlockDriverState *bs, BDRVVHDXState *s,
> uint64_t *new_offset)
> {
> - *new_offset = bdrv_getlength(bs->file);
> + *new_offset = bdrv_getlength(bs->file->bs);
>
> /* per the spec, the address for a block is in units of 1MB */
> *new_offset = ROUND_UP(*new_offset, 1024 * 1024);
>
> - return bdrv_truncate(bs->file, *new_offset + s->block_size);
> + return bdrv_truncate(bs->file->bs, *new_offset + s->block_size);
> }
>
> /*
> @@ -1260,7 +1262,7 @@ static coroutine_fn int vhdx_co_writev(BlockDriverState
> *bs, int64_t sector_num,
> /* Queue another write of zero buffers if the underlying file
> * does not zero-fill on file extension */
>
> - if (bdrv_has_zero_init(bs->file) == 0) {
> + if (bdrv_has_zero_init(bs->file->bs) == 0) {
> use_zero_buffers = true;
>
> /* zero fill the front, if any */
> @@ -1327,7 +1329,7 @@ static coroutine_fn int vhdx_co_writev(BlockDriverState
> *bs, int64_t sector_num,
> }
> /* block exists, so we can just overwrite it */
> qemu_co_mutex_unlock(&s->lock);
> - ret = bdrv_co_writev(bs->file,
> + ret = bdrv_co_writev(bs->file->bs,
> sinfo.file_offset >> BDRV_SECTOR_BITS,
> sectors_to_write, &hd_qiov);
> qemu_co_mutex_lock(&s->lock);
> diff --git a/block/vmdk.c b/block/vmdk.c
> index 9702132..9f7e7db 100644
> --- a/block/vmdk.c
> +++ b/block/vmdk.c
> @@ -221,7 +221,7 @@ static void vmdk_free_extents(BlockDriverState *bs)
> g_free(e->l2_cache);
> g_free(e->l1_backup_table);
> g_free(e->type);
> - if (e->file != bs->file_child) {
> + if (e->file != bs->file) {
> bdrv_unref_child(bs, e->file);
> }
> }
> @@ -248,7 +248,7 @@ static uint32_t vmdk_read_cid(BlockDriverState *bs, int
> parent)
> BDRVVmdkState *s = bs->opaque;
> int ret;
>
> - ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE);
> + ret = bdrv_pread(bs->file->bs, s->desc_offset, desc, DESC_SIZE);
> if (ret < 0) {
> return 0;
> }
> @@ -278,7 +278,7 @@ static int vmdk_write_cid(BlockDriverState *bs, uint32_t
> cid)
> BDRVVmdkState *s = bs->opaque;
> int ret;
>
> - ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE);
> + ret = bdrv_pread(bs->file->bs, s->desc_offset, desc, DESC_SIZE);
> if (ret < 0) {
> return ret;
> }
> @@ -297,7 +297,7 @@ static int vmdk_write_cid(BlockDriverState *bs, uint32_t
> cid)
> pstrcat(desc, sizeof(desc), tmp_desc);
> }
>
> - ret = bdrv_pwrite_sync(bs->file, s->desc_offset, desc, DESC_SIZE);
> + ret = bdrv_pwrite_sync(bs->file->bs, s->desc_offset, desc, DESC_SIZE);
> if (ret < 0) {
> return ret;
> }
> @@ -340,7 +340,7 @@ static int vmdk_parent_open(BlockDriverState *bs)
> int ret;
>
> desc[DESC_SIZE] = '\0';
> - ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE);
> + ret = bdrv_pread(bs->file->bs, s->desc_offset, desc, DESC_SIZE);
> if (ret < 0) {
> return ret;
> }
> @@ -621,7 +621,7 @@ static int vmdk_open_vmdk4(BlockDriverState *bs,
> } QEMU_PACKED footer;
>
> ret = bdrv_pread(file->bs,
> - bs->file->total_sectors * 512 - 1536,
> + bs->file->bs->total_sectors * 512 - 1536,
> &footer, sizeof(footer));
> if (ret < 0) {
> error_setg_errno(errp, -ret, "Failed to read footer");
> @@ -819,7 +819,7 @@ static int vmdk_parse_extents(const char *desc,
> BlockDriverState *bs,
> !desc_file_path[0])
> {
> error_setg(errp, "Cannot use relative extent paths with VMDK "
> - "descriptor file '%s'", bs->file->filename);
> + "descriptor file '%s'", bs->file->bs->filename);
> return -EINVAL;
> }
>
> @@ -905,7 +905,8 @@ static int vmdk_open_desc_file(BlockDriverState *bs, int
> flags, char *buf,
> }
> s->create_type = g_strdup(ct);
> s->desc_offset = 0;
> - ret = vmdk_parse_extents(buf, bs, bs->file->exact_filename, options,
> errp);
> + ret = vmdk_parse_extents(buf, bs, bs->file->bs->exact_filename, options,
> + errp);
> exit:
> return ret;
> }
> @@ -918,7 +919,7 @@ static int vmdk_open(BlockDriverState *bs, QDict
> *options, int flags,
> BDRVVmdkState *s = bs->opaque;
> uint32_t magic;
>
> - buf = vmdk_read_desc(bs->file, 0, errp);
> + buf = vmdk_read_desc(bs->file->bs, 0, errp);
> if (!buf) {
> return -EINVAL;
> }
> @@ -927,7 +928,7 @@ static int vmdk_open(BlockDriverState *bs, QDict
> *options, int flags,
> switch (magic) {
> case VMDK3_MAGIC:
> case VMDK4_MAGIC:
> - ret = vmdk_open_sparse(bs, bs->file_child, flags, buf, options,
> + ret = vmdk_open_sparse(bs, bs->file, flags, buf, options,
> errp);
> s->desc_offset = 0x200;
> break;
> @@ -1275,7 +1276,7 @@ static int64_t coroutine_fn
> vmdk_co_get_block_status(BlockDriverState *bs,
> break;
> case VMDK_OK:
> ret = BDRV_BLOCK_DATA;
> - if (extent->file == bs->file_child && !extent->compressed) {
> + if (extent->file == bs->file && !extent->compressed) {
> ret |= BDRV_BLOCK_OFFSET_VALID | offset;
> }
>
> @@ -2051,12 +2052,12 @@ static int64_t
> vmdk_get_allocated_file_size(BlockDriverState *bs)
> int64_t r;
> BDRVVmdkState *s = bs->opaque;
>
> - ret = bdrv_get_allocated_file_size(bs->file);
> + ret = bdrv_get_allocated_file_size(bs->file->bs);
> if (ret < 0) {
> return ret;
> }
> for (i = 0; i < s->num_extents; i++) {
> - if (s->extents[i].file == bs->file_child) {
> + if (s->extents[i].file == bs->file) {
> continue;
> }
> r = bdrv_get_allocated_file_size(s->extents[i].file->bs);
> diff --git a/block/vpc.c b/block/vpc.c
> index 2b3b518..299d373 100644
> --- a/block/vpc.c
> +++ b/block/vpc.c
> @@ -172,14 +172,14 @@ static int vpc_open(BlockDriverState *bs, QDict
> *options, int flags,
> int disk_type = VHD_DYNAMIC;
> int ret;
>
> - ret = bdrv_pread(bs->file, 0, s->footer_buf, HEADER_SIZE);
> + ret = bdrv_pread(bs->file->bs, 0, s->footer_buf, HEADER_SIZE);
> if (ret < 0) {
> goto fail;
> }
>
> footer = (VHDFooter *) s->footer_buf;
> if (strncmp(footer->creator, "conectix", 8)) {
> - int64_t offset = bdrv_getlength(bs->file);
> + int64_t offset = bdrv_getlength(bs->file->bs);
> if (offset < 0) {
> ret = offset;
> goto fail;
> @@ -189,7 +189,7 @@ static int vpc_open(BlockDriverState *bs, QDict *options,
> int flags,
> }
>
> /* If a fixed disk, the footer is found only at the end of the file
> */
> - ret = bdrv_pread(bs->file, offset-HEADER_SIZE, s->footer_buf,
> + ret = bdrv_pread(bs->file->bs, offset-HEADER_SIZE, s->footer_buf,
> HEADER_SIZE);
> if (ret < 0) {
> goto fail;
> @@ -232,7 +232,7 @@ static int vpc_open(BlockDriverState *bs, QDict *options,
> int flags,
> }
>
> if (disk_type == VHD_DYNAMIC) {
> - ret = bdrv_pread(bs->file, be64_to_cpu(footer->data_offset), buf,
> + ret = bdrv_pread(bs->file->bs, be64_to_cpu(footer->data_offset), buf,
> HEADER_SIZE);
> if (ret < 0) {
> goto fail;
> @@ -280,7 +280,7 @@ static int vpc_open(BlockDriverState *bs, QDict *options,
> int flags,
>
> pagetable_size = (uint64_t) s->max_table_entries * 4;
>
> - s->pagetable = qemu_try_blockalign(bs->file, pagetable_size);
> + s->pagetable = qemu_try_blockalign(bs->file->bs, pagetable_size);
> if (s->pagetable == NULL) {
> ret = -ENOMEM;
> goto fail;
> @@ -288,7 +288,8 @@ static int vpc_open(BlockDriverState *bs, QDict *options,
> int flags,
>
> s->bat_offset = be64_to_cpu(dyndisk_header->table_offset);
>
> - ret = bdrv_pread(bs->file, s->bat_offset, s->pagetable,
> pagetable_size);
> + ret = bdrv_pread(bs->file->bs, s->bat_offset, s->pagetable,
> + pagetable_size);
> if (ret < 0) {
> goto fail;
> }
> @@ -308,7 +309,7 @@ static int vpc_open(BlockDriverState *bs, QDict *options,
> int flags,
> }
> }
>
> - if (s->free_data_block_offset > bdrv_getlength(bs->file)) {
> + if (s->free_data_block_offset > bdrv_getlength(bs->file->bs)) {
> error_setg(errp, "block-vpc: free_data_block_offset points after
> "
> "the end of file. The image has been
> truncated.");
> ret = -EINVAL;
> @@ -383,7 +384,7 @@ static inline int64_t get_sector_offset(BlockDriverState
> *bs,
>
> s->last_bitmap_offset = bitmap_offset;
> memset(bitmap, 0xff, s->bitmap_size);
> - bdrv_pwrite_sync(bs->file, bitmap_offset, bitmap, s->bitmap_size);
> + bdrv_pwrite_sync(bs->file->bs, bitmap_offset, bitmap,
> s->bitmap_size);
> }
>
> return block_offset;
> @@ -401,7 +402,7 @@ static int rewrite_footer(BlockDriverState* bs)
> BDRVVPCState *s = bs->opaque;
> int64_t offset = s->free_data_block_offset;
>
> - ret = bdrv_pwrite_sync(bs->file, offset, s->footer_buf, HEADER_SIZE);
> + ret = bdrv_pwrite_sync(bs->file->bs, offset, s->footer_buf, HEADER_SIZE);
> if (ret < 0)
> return ret;
>
> @@ -436,7 +437,7 @@ static int64_t alloc_block(BlockDriverState* bs, int64_t
> sector_num)
>
> // Initialize the block's bitmap
> memset(bitmap, 0xff, s->bitmap_size);
> - ret = bdrv_pwrite_sync(bs->file, s->free_data_block_offset, bitmap,
> + ret = bdrv_pwrite_sync(bs->file->bs, s->free_data_block_offset, bitmap,
> s->bitmap_size);
> if (ret < 0) {
> return ret;
> @@ -451,7 +452,7 @@ static int64_t alloc_block(BlockDriverState* bs, int64_t
> sector_num)
> // Write BAT entry to disk
> bat_offset = s->bat_offset + (4 * index);
> bat_value = cpu_to_be32(s->pagetable[index]);
> - ret = bdrv_pwrite_sync(bs->file, bat_offset, &bat_value, 4);
> + ret = bdrv_pwrite_sync(bs->file->bs, bat_offset, &bat_value, 4);
> if (ret < 0)
> goto fail;
>
> @@ -485,7 +486,7 @@ static int vpc_read(BlockDriverState *bs, int64_t
> sector_num,
> VHDFooter *footer = (VHDFooter *) s->footer_buf;
>
> if (be32_to_cpu(footer->type) == VHD_FIXED) {
> - return bdrv_read(bs->file, sector_num, buf, nb_sectors);
> + return bdrv_read(bs->file->bs, sector_num, buf, nb_sectors);
> }
> while (nb_sectors > 0) {
> offset = get_sector_offset(bs, sector_num, 0);
> @@ -499,7 +500,7 @@ static int vpc_read(BlockDriverState *bs, int64_t
> sector_num,
> if (offset == -1) {
> memset(buf, 0, sectors * BDRV_SECTOR_SIZE);
> } else {
> - ret = bdrv_pread(bs->file, offset, buf,
> + ret = bdrv_pread(bs->file->bs, offset, buf,
> sectors * BDRV_SECTOR_SIZE);
> if (ret != sectors * BDRV_SECTOR_SIZE) {
> return -1;
> @@ -534,7 +535,7 @@ static int vpc_write(BlockDriverState *bs, int64_t
> sector_num,
> VHDFooter *footer = (VHDFooter *) s->footer_buf;
>
> if (be32_to_cpu(footer->type) == VHD_FIXED) {
> - return bdrv_write(bs->file, sector_num, buf, nb_sectors);
> + return bdrv_write(bs->file->bs, sector_num, buf, nb_sectors);
> }
> while (nb_sectors > 0) {
> offset = get_sector_offset(bs, sector_num, 1);
> @@ -551,7 +552,8 @@ static int vpc_write(BlockDriverState *bs, int64_t
> sector_num,
> return -1;
> }
>
> - ret = bdrv_pwrite(bs->file, offset, buf, sectors * BDRV_SECTOR_SIZE);
> + ret = bdrv_pwrite(bs->file->bs, offset, buf,
> + sectors * BDRV_SECTOR_SIZE);
> if (ret != sectors * BDRV_SECTOR_SIZE) {
> return -1;
> }
> @@ -878,7 +880,7 @@ static int vpc_has_zero_init(BlockDriverState *bs)
> VHDFooter *footer = (VHDFooter *) s->footer_buf;
>
> if (be32_to_cpu(footer->type) == VHD_FIXED) {
> - return bdrv_has_zero_init(bs->file);
> + return bdrv_has_zero_init(bs->file->bs);
> } else {
> return 1;
> }
> diff --git a/include/block/block.h b/include/block/block.h
> index 2dd6630..7ebb35d 100644
> --- a/include/block/block.h
> +++ b/include/block/block.h
> @@ -585,7 +585,13 @@ typedef enum {
> BLKDBG_EVENT_MAX,
> } BlkDebugEvent;
>
> -#define BLKDBG_EVENT(bs, evt) bdrv_debug_event(bs, evt)
> +#define BLKDBG_EVENT(child, evt) \
> + do { \
> + if (child) { \
> + bdrv_debug_event(child->bs, evt); \
> + } \
> + } while(0)
> +
I'm a bit surprised you changed the argument type to BdrvChild, since adding a
BLKDBG_EVENT_CHILD is more natural to me. But that probably doesn't hurt much:
Reviewed-by: Fam Zheng <address@hidden>
- [Qemu-block] [PATCH v2 00/16] block: Get rid of bdrv_swap(), Kevin Wolf, 2015/10/08
- [Qemu-block] [PATCH v2 04/16] quorum: Convert to BdrvChild, Kevin Wolf, 2015/10/08
- [Qemu-block] [PATCH v2 06/16] block: Remove bdrv_open_image(), Kevin Wolf, 2015/10/08
- [Qemu-block] [PATCH v2 16/16] block: Remove bdrv_swap(), Kevin Wolf, 2015/10/08
- [Qemu-block] [PATCH v2 15/16] block: Add and use bdrv_replace_in_backing_chain(), Kevin Wolf, 2015/10/08
- [Qemu-block] [PATCH v2 05/16] block: Convert bs->file to BdrvChild, Kevin Wolf, 2015/10/08
- [Qemu-block] [PATCH v2 11/16] block-backend: Add blk_set_bs(), Kevin Wolf, 2015/10/08
- [Qemu-block] [PATCH v2 14/16] blockjob: Store device name at job creation, Kevin Wolf, 2015/10/08
- [Qemu-block] [PATCH v2 03/16] blkverify: Convert s->test_file to BdrvChild, Kevin Wolf, 2015/10/08
- [Qemu-block] [PATCH v2 09/16] block: Split bdrv_move_feature_fields(), Kevin Wolf, 2015/10/08