From nobody Wed May 1 23:18:15 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1498762054240838.3545553805898; Thu, 29 Jun 2017 11:47:34 -0700 (PDT) Received: from localhost ([::1]:40799 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dQeTT-0004m6-Ua for importer@patchew.org; Thu, 29 Jun 2017 14:47:31 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:45341) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dQeQQ-0002dN-Qc for qemu-devel@nongnu.org; Thu, 29 Jun 2017 14:44:23 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dQeQP-0005Qg-QD for qemu-devel@nongnu.org; Thu, 29 Jun 2017 14:44:22 -0400 Received: from smtp1.ntua.gr ([2001:648:2000:de::183]:38407) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dQeQM-0005OZ-3w; Thu, 29 Jun 2017 14:44:18 -0400 Received: from mail.ntua.gr (ppp005055127131.access.hol.gr [5.55.127.131]) (authenticated bits=0) by smtp1.ntua.gr (8.15.2/8.15.2) with ESMTPSA id v5TIhjY2022393 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 29 Jun 2017 21:43:45 +0300 (EEST) (envelope-from el13635@mail.ntua.gr) X-Authentication-Warning: smtp1.ntua.gr: Host ppp005055127131.access.hol.gr [5.55.127.131] claimed to be mail.ntua.gr From: Manos Pitsidianakis To: qemu-devel Date: Thu, 29 Jun 2017 21:43:18 +0300 Message-Id: <20170629184320.7151-2-el13635@mail.ntua.gr> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170629184320.7151-1-el13635@mail.ntua.gr> References: <20170629184320.7151-1-el13635@mail.ntua.gr> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2001:648:2000:de::183 Subject: [Qemu-devel] [PATCH v2 1/3] block: pass bdrv_* methods to bs->file by default X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , Alberto Garcia , Stefan Hajnoczi , qemu-block , Max Reitz Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" The following functions fail if bs->drv does not implement them: bdrv_probe_blocksizes bdrv_probe_geometry bdrv_truncate bdrv_has_zero_init bdrv_get_info bdrv_media_changed bdrv_eject bdrv_lock_medium bdrv_co_ioctl Instead, the call should be passed to bs->file if it exists, to allow filter drivers to support those methods without implementing them. Signed-off-by: Manos Pitsidianakis Reviewed-by: Eric Blake --- block.c | 27 +++++++++++++++++++++++++-- block/io.c | 5 +++++ 2 files changed, 30 insertions(+), 2 deletions(-) diff --git a/block.c b/block.c index 69439628..9e8d34ad 100644 --- a/block.c +++ b/block.c @@ -494,6 +494,8 @@ int bdrv_probe_blocksizes(BlockDriverState *bs, BlockSi= zes *bsz) =20 if (drv && drv->bdrv_probe_blocksizes) { return drv->bdrv_probe_blocksizes(bs, bsz); + } else if (drv && bs->file && bs->file->bs) { + return bdrv_probe_blocksizes(bs->file->bs, bsz); } =20 return -ENOTSUP; @@ -511,6 +513,8 @@ int bdrv_probe_geometry(BlockDriverState *bs, HDGeometr= y *geo) =20 if (drv && drv->bdrv_probe_geometry) { return drv->bdrv_probe_geometry(bs, geo); + } else if (drv && bs->file && bs->file->bs) { + return bdrv_probe_geometry(bs->file->bs, geo); } =20 return -ENOTSUP; @@ -3406,11 +3410,15 @@ int bdrv_truncate(BdrvChild *child, int64_t offset,= Error **errp) =20 assert(child->perm & BLK_PERM_RESIZE); =20 + /* if bs->drv =3D=3D NULL, bs is closed, so there's nothing to do here= */ if (!drv) { error_setg(errp, "No medium inserted"); return -ENOMEDIUM; } if (!drv->bdrv_truncate) { + if (bs->file && bs->file->bs) { + return bdrv_truncate(bs->file, offset, errp); + } error_setg(errp, "Image format driver does not support resize"); return -ENOTSUP; } @@ -3778,6 +3786,9 @@ int bdrv_has_zero_init(BlockDriverState *bs) if (bs->drv->bdrv_has_zero_init) { return bs->drv->bdrv_has_zero_init(bs); } + if (bs->file && bs->file->bs) { + return bdrv_has_zero_init(bs->file->bs); + } =20 /* safe default */ return 0; @@ -3832,10 +3843,16 @@ void bdrv_get_backing_filename(BlockDriverState *bs, int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) { BlockDriver *drv =3D bs->drv; - if (!drv) + /* if bs->drv =3D=3D NULL, bs is closed, so there's nothing to do here= */ + if (!drv) { return -ENOMEDIUM; - if (!drv->bdrv_get_info) + } + if (!drv->bdrv_get_info) { + if (bs->file && bs->file->bs) { + return bdrv_get_info(bs->file->bs, bdi); + } return -ENOTSUP; + } memset(bdi, 0, sizeof(*bdi)); return drv->bdrv_get_info(bs, bdi); } @@ -4205,6 +4222,8 @@ int bdrv_media_changed(BlockDriverState *bs) =20 if (drv && drv->bdrv_media_changed) { return drv->bdrv_media_changed(bs); + } else if (drv && bs->file && bs->file->bs) { + bdrv_media_changed(bs->file->bs); } return -ENOTSUP; } @@ -4218,6 +4237,8 @@ void bdrv_eject(BlockDriverState *bs, bool eject_flag) =20 if (drv && drv->bdrv_eject) { drv->bdrv_eject(bs, eject_flag); + } else if (drv && bs->file && bs->file->bs) { + bdrv_eject(bs->file->bs, eject_flag); } } =20 @@ -4233,6 +4254,8 @@ void bdrv_lock_medium(BlockDriverState *bs, bool lock= ed) =20 if (drv && drv->bdrv_lock_medium) { drv->bdrv_lock_medium(bs, locked); + } else if (drv && bs->file && bs->file->bs) { + bdrv_lock_medium(bs->file->bs, locked); } } =20 diff --git a/block/io.c b/block/io.c index c72d7015..a1aee01d 100644 --- a/block/io.c +++ b/block/io.c @@ -2401,6 +2401,11 @@ int bdrv_co_ioctl(BlockDriverState *bs, int req, voi= d *buf) }; BlockAIOCB *acb; =20 + if (drv && !drv->bdrv_aio_ioctl && !drv->bdrv_co_ioctl && + bs->file && bs->file->bs) { + return bdrv_co_ioctl(bs->file->bs, req, buf); + } + bdrv_inc_in_flight(bs); if (!drv || (!drv->bdrv_aio_ioctl && !drv->bdrv_co_ioctl)) { co.ret =3D -ENOTSUP; --=20 2.11.0 From nobody Wed May 1 23:18:15 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1498762038733846.3195041279461; Thu, 29 Jun 2017 11:47:18 -0700 (PDT) Received: from localhost ([::1]:40797 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dQeTE-0004Yt-BT for importer@patchew.org; Thu, 29 Jun 2017 14:47:16 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:45384) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dQeQX-0002kh-DM for qemu-devel@nongnu.org; Thu, 29 Jun 2017 14:44:30 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dQeQW-0005Ta-Jy for qemu-devel@nongnu.org; Thu, 29 Jun 2017 14:44:29 -0400 Received: from smtp1.ntua.gr ([2001:648:2000:de::183]:38423) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dQeQR-0005R7-2p; Thu, 29 Jun 2017 14:44:23 -0400 Received: from mail.ntua.gr (ppp005055127131.access.hol.gr [5.55.127.131]) (authenticated bits=0) by smtp1.ntua.gr (8.15.2/8.15.2) with ESMTPSA id v5TIhlr2022423 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 29 Jun 2017 21:43:47 +0300 (EEST) (envelope-from el13635@mail.ntua.gr) X-Authentication-Warning: smtp1.ntua.gr: Host ppp005055127131.access.hol.gr [5.55.127.131] claimed to be mail.ntua.gr From: Manos Pitsidianakis To: qemu-devel Date: Thu, 29 Jun 2017 21:43:19 +0300 Message-Id: <20170629184320.7151-3-el13635@mail.ntua.gr> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170629184320.7151-1-el13635@mail.ntua.gr> References: <20170629184320.7151-1-el13635@mail.ntua.gr> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2001:648:2000:de::183 Subject: [Qemu-devel] [PATCH v2 2/3] block: use defaults of bdrv_* callbacks in raw X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , Alberto Garcia , Stefan Hajnoczi , qemu-block , Max Reitz Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Now that passing the call to bs->file is the default for some bdrv_* callbacks, remove the duplicate implementations in block/raw-format.c Signed-off-by: Manos Pitsidianakis Reviewed-by: Eric Blake Reviewed-by: Stefan Hajnoczi --- block/raw-format.c | 32 +------------------------------- 1 file changed, 1 insertion(+), 31 deletions(-) diff --git a/block/raw-format.c b/block/raw-format.c index 1ea8c2d7..ff9b4359 100644 --- a/block/raw-format.c +++ b/block/raw-format.c @@ -312,11 +312,6 @@ static int64_t raw_getlength(BlockDriverState *bs) return s->size; } =20 -static int raw_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) -{ - return bdrv_get_info(bs->file->bs, bdi); -} - static void raw_refresh_limits(BlockDriverState *bs, Error **errp) { if (bs->probed) { @@ -346,21 +341,6 @@ static int raw_truncate(BlockDriverState *bs, int64_t = offset, Error **errp) return bdrv_truncate(bs->file, offset, errp); } =20 -static int raw_media_changed(BlockDriverState *bs) -{ - return bdrv_media_changed(bs->file->bs); -} - -static void raw_eject(BlockDriverState *bs, bool eject_flag) -{ - bdrv_eject(bs->file->bs, eject_flag); -} - -static void raw_lock_medium(BlockDriverState *bs, bool locked) -{ - bdrv_lock_medium(bs->file->bs, locked); -} - static int raw_co_ioctl(BlockDriverState *bs, unsigned long int req, void = *buf) { BDRVRawState *s =3D bs->opaque; @@ -370,11 +350,6 @@ static int raw_co_ioctl(BlockDriverState *bs, unsigned= long int req, void *buf) return bdrv_co_ioctl(bs->file->bs, req, buf); } =20 -static int raw_has_zero_init(BlockDriverState *bs) -{ - return bdrv_has_zero_init(bs->file->bs); -} - static int raw_create(const char *filename, QemuOpts *opts, Error **errp) { return bdrv_create_file(filename, opts, errp); @@ -479,16 +454,11 @@ BlockDriver bdrv_raw =3D { .bdrv_truncate =3D &raw_truncate, .bdrv_getlength =3D &raw_getlength, .has_variable_length =3D true, - .bdrv_get_info =3D &raw_get_info, .bdrv_refresh_limits =3D &raw_refresh_limits, .bdrv_probe_blocksizes =3D &raw_probe_blocksizes, .bdrv_probe_geometry =3D &raw_probe_geometry, - .bdrv_media_changed =3D &raw_media_changed, - .bdrv_eject =3D &raw_eject, - .bdrv_lock_medium =3D &raw_lock_medium, .bdrv_co_ioctl =3D &raw_co_ioctl, - .create_opts =3D &raw_create_opts, - .bdrv_has_zero_init =3D &raw_has_zero_init + .create_opts =3D &raw_create_opts }; =20 static void bdrv_raw_init(void) --=20 2.11.0 From nobody Wed May 1 23:18:15 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; 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Thu, 29 Jun 2017 14:44:23 -0400 Received: from mail.ntua.gr (ppp005055127131.access.hol.gr [5.55.127.131]) (authenticated bits=0) by smtp1.ntua.gr (8.15.2/8.15.2) with ESMTPSA id v5TIho2b022445 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 29 Jun 2017 21:43:50 +0300 (EEST) (envelope-from el13635@mail.ntua.gr) X-Authentication-Warning: smtp1.ntua.gr: Host ppp005055127131.access.hol.gr [5.55.127.131] claimed to be mail.ntua.gr From: Manos Pitsidianakis To: qemu-devel Date: Thu, 29 Jun 2017 21:43:20 +0300 Message-Id: <20170629184320.7151-4-el13635@mail.ntua.gr> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170629184320.7151-1-el13635@mail.ntua.gr> References: <20170629184320.7151-1-el13635@mail.ntua.gr> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2001:648:2000:de::183 Subject: [Qemu-devel] [PATCH v2 3/3] block: add default implementations for bdrv_co_get_block_status() X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , Alberto Garcia , Stefan Hajnoczi , qemu-block , Max Reitz Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" bdrv_co_get_block_status_from_file() and bdrv_co_get_block_status_from_backing() set *file to bs->file and bs->backing respectively, so that bdrv_co_get_block_status() can recurse to them. Future block drivers won't have to duplicate code to implement this. Reviewed-by: Stefan Hajnoczi Signed-off-by: Manos Pitsidianakis Reviewed-by: Eric Blake --- block/blkdebug.c | 12 +----------- block/commit.c | 12 +----------- block/io.c | 24 ++++++++++++++++++++++++ block/mirror.c | 12 +----------- include/block/block_int.h | 16 ++++++++++++++++ 5 files changed, 43 insertions(+), 33 deletions(-) diff --git a/block/blkdebug.c b/block/blkdebug.c index b25856c4..f1539db6 100644 --- a/block/blkdebug.c +++ b/block/blkdebug.c @@ -641,16 +641,6 @@ static int coroutine_fn blkdebug_co_pdiscard(BlockDriv= erState *bs, return bdrv_co_pdiscard(bs->file->bs, offset, bytes); } =20 -static int64_t coroutine_fn blkdebug_co_get_block_status( - BlockDriverState *bs, int64_t sector_num, int nb_sectors, int *pnum, - BlockDriverState **file) -{ - *pnum =3D nb_sectors; - *file =3D bs->file->bs; - return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID | - (sector_num << BDRV_SECTOR_BITS); -} - static void blkdebug_close(BlockDriverState *bs) { BDRVBlkdebugState *s =3D bs->opaque; @@ -925,7 +915,7 @@ static BlockDriver bdrv_blkdebug =3D { .bdrv_co_flush_to_disk =3D blkdebug_co_flush, .bdrv_co_pwrite_zeroes =3D blkdebug_co_pwrite_zeroes, .bdrv_co_pdiscard =3D blkdebug_co_pdiscard, - .bdrv_co_get_block_status =3D blkdebug_co_get_block_status, + .bdrv_co_get_block_status =3D bdrv_co_get_block_status_from_file, =20 .bdrv_debug_event =3D blkdebug_debug_event, .bdrv_debug_breakpoint =3D blkdebug_debug_breakpoint, diff --git a/block/commit.c b/block/commit.c index 524bd549..5b04f832 100644 --- a/block/commit.c +++ b/block/commit.c @@ -247,16 +247,6 @@ static int coroutine_fn bdrv_commit_top_preadv(BlockDr= iverState *bs, return bdrv_co_preadv(bs->backing, offset, bytes, qiov, flags); } =20 -static int64_t coroutine_fn bdrv_commit_top_get_block_status( - BlockDriverState *bs, int64_t sector_num, int nb_sectors, int *pnum, - BlockDriverState **file) -{ - *pnum =3D nb_sectors; - *file =3D bs->backing->bs; - return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID | - (sector_num << BDRV_SECTOR_BITS); -} - static void bdrv_commit_top_refresh_filename(BlockDriverState *bs, QDict *= opts) { bdrv_refresh_filename(bs->backing->bs); @@ -282,7 +272,7 @@ static void bdrv_commit_top_child_perm(BlockDriverState= *bs, BdrvChild *c, static BlockDriver bdrv_commit_top =3D { .format_name =3D "commit_top", .bdrv_co_preadv =3D bdrv_commit_top_preadv, - .bdrv_co_get_block_status =3D bdrv_commit_top_get_block_status, + .bdrv_co_get_block_status =3D bdrv_co_get_block_status_from_backing, .bdrv_refresh_filename =3D bdrv_commit_top_refresh_filename, .bdrv_close =3D bdrv_commit_top_close, .bdrv_child_perm =3D bdrv_commit_top_child_perm, diff --git a/block/io.c b/block/io.c index a1aee01d..2487cc03 100644 --- a/block/io.c +++ b/block/io.c @@ -1706,6 +1706,30 @@ typedef struct BdrvCoGetBlockStatusData { bool done; } BdrvCoGetBlockStatusData; =20 +int64_t coroutine_fn bdrv_co_get_block_status_from_file(BlockDriverState *= bs, + int64_t sector_num, + int nb_sectors, int *= pnum, + BlockDriverState **fi= le) +{ + assert(bs->file && bs->file->bs); + *pnum =3D nb_sectors; + *file =3D bs->file->bs; + return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID | + (sector_num << BDRV_SECTOR_BITS); +} + +int64_t coroutine_fn bdrv_co_get_block_status_from_backing(BlockDriverStat= e *bs, + int64_t sector_num, + int nb_sectors, int *= pnum, + BlockDriverState **fi= le) +{ + assert(bs->backing && bs->backing->bs); + *pnum =3D nb_sectors; + *file =3D bs->backing->bs; + return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID | + (sector_num << BDRV_SECTOR_BITS); +} + /* * Returns the allocation status of the specified sectors. * Drivers not implementing the functionality are assumed to not support diff --git a/block/mirror.c b/block/mirror.c index 61a862dc..e8bf5f40 100644 --- a/block/mirror.c +++ b/block/mirror.c @@ -1052,16 +1052,6 @@ static int coroutine_fn bdrv_mirror_top_flush(BlockD= riverState *bs) return bdrv_co_flush(bs->backing->bs); } =20 -static int64_t coroutine_fn bdrv_mirror_top_get_block_status( - BlockDriverState *bs, int64_t sector_num, int nb_sectors, int *pnum, - BlockDriverState **file) -{ - *pnum =3D nb_sectors; - *file =3D bs->backing->bs; - return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID | - (sector_num << BDRV_SECTOR_BITS); -} - static int coroutine_fn bdrv_mirror_top_pwrite_zeroes(BlockDriverState *bs, int64_t offset, int bytes, BdrvRequestFlags flags) { @@ -1108,7 +1098,7 @@ static BlockDriver bdrv_mirror_top =3D { .bdrv_co_pwrite_zeroes =3D bdrv_mirror_top_pwrite_zeroes, .bdrv_co_pdiscard =3D bdrv_mirror_top_pdiscard, .bdrv_co_flush =3D bdrv_mirror_top_flush, - .bdrv_co_get_block_status =3D bdrv_mirror_top_get_block_status, + .bdrv_co_get_block_status =3D bdrv_co_get_block_status_from_backing, .bdrv_refresh_filename =3D bdrv_mirror_top_refresh_filename, .bdrv_close =3D bdrv_mirror_top_close, .bdrv_child_perm =3D bdrv_mirror_top_child_perm, diff --git a/include/block/block_int.h b/include/block/block_int.h index 15fa6021..a42c2a6f 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -945,6 +945,22 @@ void bdrv_format_default_perms(BlockDriverState *bs, B= drvChild *c, uint64_t perm, uint64_t shared, uint64_t *nperm, uint64_t *nshared); =20 +/* + * Default implementation for drivers to pass bdrv_co_get_block_status() to + * their file + * */ +int64_t coroutine_fn bdrv_co_get_block_status_from_file(BlockDriverState *= bs, + int64_t sector_num, + int nb_sectors, int *= pnum, + BlockDriverState **fi= le); +/* + * Default implementation for drivers to pass bdrv_co_get_block_status() to + * their backing file + * */ +int64_t coroutine_fn bdrv_co_get_block_status_from_backing(BlockDriverStat= e *bs, + int64_t sector_num, + int nb_sectors, int *= pnum, + BlockDriverState **fi= le); const char *bdrv_get_parent_name(const BlockDriverState *bs); void blk_dev_change_media_cb(BlockBackend *blk, bool load, Error **errp); bool blk_dev_has_removable_media(BlockBackend *blk); --=20 2.11.0