From nobody Sun Oct 5 17:36:07 2025 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.zohomail.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 1515193437436899.176217598725; Fri, 5 Jan 2018 15:03:57 -0800 (PST) Received: from localhost ([::1]:34617 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXb1o-00084C-IJ for importer@patchew.org; Fri, 05 Jan 2018 18:03:56 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47281) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXawF-0002oD-6L for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:15 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eXawD-0008SH-8Z for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:11 -0500 Received: from mx1.redhat.com ([209.132.183.28]:60052) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eXaw9-0008PH-6j; Fri, 05 Jan 2018 17:58:05 -0500 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 3CC7B5B2F7; Fri, 5 Jan 2018 22:58:04 +0000 (UTC) Received: from red.redhat.com (ovpn-124-124.rdu2.redhat.com [10.10.124.124]) by smtp.corp.redhat.com (Postfix) with ESMTP id 62B9360C90; Fri, 5 Jan 2018 22:58:00 +0000 (UTC) From: Eric Blake To: qemu-devel@nongnu.org Date: Fri, 5 Jan 2018 16:57:34 -0600 Message-Id: <20180105225753.30509-2-eblake@redhat.com> In-Reply-To: <20180105225753.30509-1-eblake@redhat.com> References: <20180105225753.30509-1-eblake@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.26]); Fri, 05 Jan 2018 22:58:04 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v7 01/20] block: Add .bdrv_co_block_status() callback 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: kwolf@redhat.com, vsementsov@virtuozzo.com, famz@redhat.com, qemu-block@nongnu.org, jcody@redhat.com, Max Reitz , Stefan Hajnoczi 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" We are gradually moving away from sector-based interfaces, towards byte-based. Now that the block layer exposes byte-based allocation, it's time to tackle the drivers. Add a new callback that operates on as small as byte boundaries. Subsequent patches will then update individual drivers, then finally remove .bdrv_co_get_block_status(). The new code also passes through the 'want_zero' hint, which will allow subsequent patches to further optimize callers that only care about how much of the image is allocated (want_zero is false), rather than full details about runs of zeroes and which offsets the allocation actually maps to (want_zero is true). As part of this effort, fix another part of the documentation: the claim in commit 4c41cb4 that BDRV_BLOCK_ALLOCATED is short for 'DATA || ZERO' is a lie at the block layer (see commit e88ae2264), even though it is how the bit is computed from the driver layer. After all, there are intentionally cases where we return ZERO but not ALLOCATED at the block layer, when we know that a read sees zero because the backing file is too short. Note that the driver interface is thus slightly different than the public interface with regards to which bits will be set, and what guarantees are provided on input. We also add an assertion that any driver using the new callback will make progress (the only time pnum will be 0 is if the block layer already handled an out-of-bounds request, or if there is an error); the old driver interface did not provide this guarantee, which could lead to some inf-loops in drastic corner-case failures. Signed-off-by: Eric Blake Reviewed-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Fam Zheng --- v7: add R-b v6: drop now-useless rounding of mid-sector end-of-file hole [Kevin], better documentation of 'want_zero' [Kevin] v5: rebase to master, typo fix, document more block layer guarantees v4: rebase to master v3: no change v2: improve alignment handling, ensure all iotests still pass --- include/block/block.h | 14 +++++++------- include/block/block_int.h | 20 +++++++++++++++----- block/io.c | 28 +++++++++++++++++++--------- 3 files changed, 41 insertions(+), 21 deletions(-) diff --git a/include/block/block.h b/include/block/block.h index 9b12774ddf..179901c9f4 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -128,19 +128,19 @@ typedef struct HDGeometry { * BDRV_BLOCK_ZERO: offset reads as zero * BDRV_BLOCK_OFFSET_VALID: an associated offset exists for accessing raw = data * BDRV_BLOCK_ALLOCATED: the content of the block is determined by this - * layer (short for DATA || ZERO), set by block layer - * BDRV_BLOCK_EOF: the returned pnum covers through end of file for this l= ayer + * layer rather than any backing, set by block layer + * BDRV_BLOCK_EOF: the returned pnum covers through end of file for this + * layer, set by block layer * * Internal flag: * BDRV_BLOCK_RAW: for use by passthrough drivers, such as raw, to request * that the block layer recompute the answer from the retu= rned * BDS; must be accompanied by just BDRV_BLOCK_OFFSET_VALI= D. * - * If BDRV_BLOCK_OFFSET_VALID is set, bits 9-62 (BDRV_BLOCK_OFFSET_MASK) of - * the return value (old interface) or the entire map parameter (new - * interface) represent the offset in the returned BDS that is allocated f= or - * the corresponding raw data. However, whether that offset actually - * contains data also depends on BDRV_BLOCK_DATA, as follows: + * If BDRV_BLOCK_OFFSET_VALID is set, the map parameter represents the + * host offset within the returned BDS that is allocated for the + * corresponding raw guest data. However, whether that offset + * actually contains data also depends on BDRV_BLOCK_DATA, as follows: * * DATA ZERO OFFSET_VALID * t t t sectors read as zero, returned file is zero at o= ffset diff --git a/include/block/block_int.h b/include/block/block_int.h index 29cafa4236..4c9777b55d 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -204,15 +204,25 @@ struct BlockDriver { /* * Building block for bdrv_block_status[_above] and * bdrv_is_allocated[_above]. The driver should answer only - * according to the current layer, and should not set - * BDRV_BLOCK_ALLOCATED, but may set BDRV_BLOCK_RAW. See block.h - * for the meaning of _DATA, _ZERO, and _OFFSET_VALID. The block - * layer guarantees input aligned to request_alignment, as well as - * non-NULL pnum and file. + * according to the current layer, and should only need to set + * BDRV_BLOCK_DATA, BDRV_BLOCK_ZERO, BDRV_BLOCK_OFFSET_VALID, + * and/or BDRV_BLOCK_RAW; if the current layer defers to a backing + * layer, the result should be 0 (and not BDRV_BLOCK_ZERO). See + * block.h for the overall meaning of the bits. As a hint, the + * flag want_zero is true if the caller cares more about precise + * mappings (favor accurate _OFFSET_VALID/_ZERO) or false for + * overall allocation (favor larger *pnum, perhaps by reporting + * _DATA instead of _ZERO). The block layer guarantees input + * clamped to bdrv_getlength() and aligned to request_alignment, + * as well as non-NULL pnum, map, and file; in turn, the driver + * must return an error or set pnum to an aligned non-zero value. */ int64_t coroutine_fn (*bdrv_co_get_block_status)(BlockDriverState *bs, int64_t sector_num, int nb_sectors, int *pnum, BlockDriverState **file); + int coroutine_fn (*bdrv_co_block_status)(BlockDriverState *bs, + bool want_zero, int64_t offset, int64_t bytes, int64_t *pnum, + int64_t *map, BlockDriverState **file); /* * Invalidate any cached meta-data. diff --git a/block/io.c b/block/io.c index 7ea402352e..9a697f3b20 100644 --- a/block/io.c +++ b/block/io.c @@ -1899,10 +1899,10 @@ int64_t coroutine_fn bdrv_co_get_block_status_from_= backing(BlockDriverState *bs, * Drivers not implementing the functionality are assumed to not support * backing files, hence all their sectors are reported as allocated. * - * If 'want_zero' is true, the caller is querying for mapping purposes, - * and the result should include BDRV_BLOCK_OFFSET_VALID and - * BDRV_BLOCK_ZERO where possible; otherwise, the result may omit those - * bits particularly if it allows for a larger value in 'pnum'. + * If 'want_zero' is true, the caller is querying for mapping + * purposes, with a focus on valid BDRV_BLOCK_OFFSET_VALID, _DATA, and + * _ZERO where possible; otherwise, the result favors larger 'pnum', + * with a focus on accurate BDRV_BLOCK_ALLOCATED. * * If 'offset' is beyond the end of the disk image the return value is * BDRV_BLOCK_EOF and 'pnum' is set to 0. @@ -1959,7 +1959,7 @@ static int coroutine_fn bdrv_co_block_status(BlockDri= verState *bs, /* Must be non-NULL or bdrv_getlength() would have failed */ assert(bs->drv); - if (!bs->drv->bdrv_co_get_block_status) { + if (!bs->drv->bdrv_co_get_block_status && !bs->drv->bdrv_co_block_stat= us) { *pnum =3D bytes; ret =3D BDRV_BLOCK_DATA | BDRV_BLOCK_ALLOCATED; if (offset + bytes =3D=3D total_size) { @@ -1976,13 +1976,14 @@ static int coroutine_fn bdrv_co_block_status(BlockD= riverState *bs, bdrv_inc_in_flight(bs); /* Round out to request_alignment boundaries */ - /* TODO: until we have a byte-based driver callback, we also have to - * round out to sectors, even if that is bigger than request_alignment= */ - align =3D MAX(bs->bl.request_alignment, BDRV_SECTOR_SIZE); + align =3D bs->bl.request_alignment; + if (bs->drv->bdrv_co_get_block_status && align < BDRV_SECTOR_SIZE) { + align =3D BDRV_SECTOR_SIZE; + } aligned_offset =3D QEMU_ALIGN_DOWN(offset, align); aligned_bytes =3D ROUND_UP(offset + bytes, align) - aligned_offset; - { + if (bs->drv->bdrv_co_get_block_status) { int count; /* sectors */ int64_t longret; @@ -2007,6 +2008,15 @@ static int coroutine_fn bdrv_co_block_status(BlockDr= iverState *bs, } ret =3D longret & ~BDRV_BLOCK_OFFSET_MASK; *pnum =3D count * BDRV_SECTOR_SIZE; + } else { + ret =3D bs->drv->bdrv_co_block_status(bs, want_zero, aligned_offse= t, + aligned_bytes, pnum, &local_ma= p, + &local_file); + if (ret < 0) { + *pnum =3D 0; + goto out; + } + assert(*pnum); /* The block driver must make progress */ } /* --=20 2.14.3 From nobody Sun Oct 5 17:36:07 2025 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.zohomail.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 1515193308113554.20662286789; Fri, 5 Jan 2018 15:01:48 -0800 (PST) Received: from localhost ([::1]:34598 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXazj-0005gC-72 for importer@patchew.org; Fri, 05 Jan 2018 18:01:47 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47339) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXawJ-0002sL-Dc for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:16 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eXawF-0008Tx-BA for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:15 -0500 Received: from mx1.redhat.com ([209.132.183.28]:39546) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eXawB-0008QF-01; Fri, 05 Jan 2018 17:58:07 -0500 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 13D79DF04; Fri, 5 Jan 2018 22:58:06 +0000 (UTC) Received: from red.redhat.com (ovpn-124-124.rdu2.redhat.com [10.10.124.124]) by smtp.corp.redhat.com (Postfix) with ESMTP id 844B260BE7; Fri, 5 Jan 2018 22:58:04 +0000 (UTC) From: Eric Blake To: qemu-devel@nongnu.org Date: Fri, 5 Jan 2018 16:57:35 -0600 Message-Id: <20180105225753.30509-3-eblake@redhat.com> In-Reply-To: <20180105225753.30509-1-eblake@redhat.com> References: <20180105225753.30509-1-eblake@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Fri, 05 Jan 2018 22:58:06 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v7 02/20] block: Switch passthrough drivers to .bdrv_co_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: kwolf@redhat.com, vsementsov@virtuozzo.com, famz@redhat.com, qemu-block@nongnu.org, jcody@redhat.com, Max Reitz , Stefan Hajnoczi 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" We are gradually moving away from sector-based interfaces, towards byte-based. Update the generic helpers, and all passthrough clients (blkdebug, commit, mirror, throttle) accordingly. Signed-off-by: Eric Blake Reviewed-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Fam Zheng --- v6-v7: no change v5: rebase to master v4: rebase to interface tweak v3: rebase to addition of throttle driver v2: rebase to master, retitle while merging blkdebug, commit, and mirror --- include/block/block_int.h | 28 ++++++++++++++++------------ block/io.c | 36 ++++++++++++++++++++---------------- block/blkdebug.c | 20 +++++++++++--------- block/commit.c | 2 +- block/mirror.c | 2 +- block/throttle.c | 2 +- 6 files changed, 50 insertions(+), 40 deletions(-) diff --git a/include/block/block_int.h b/include/block/block_int.h index 4c9777b55d..d4509a2711 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -1034,23 +1034,27 @@ void bdrv_format_default_perms(BlockDriverState *bs= , BdrvChild *c, uint64_t *nperm, uint64_t *nshared); /* - * Default implementation for drivers to pass bdrv_co_get_block_status() to + * Default implementation for drivers to pass bdrv_co_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 *= *file); +int coroutine_fn bdrv_co_block_status_from_file(BlockDriverState *bs, + bool want_zero, + int64_t offset, + int64_t bytes, + int64_t *pnum, + int64_t *map, + BlockDriverState **file); /* - * Default implementation for drivers to pass bdrv_co_get_block_status() to + * Default implementation for drivers to pass bdrv_co_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, - BlockDriverStat= e **file); +int coroutine_fn bdrv_co_block_status_from_backing(BlockDriverState *bs, + bool want_zero, + int64_t offset, + int64_t bytes, + int64_t *pnum, + int64_t *map, + BlockDriverState **file= ); 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); diff --git a/block/io.c b/block/io.c index 9a697f3b20..087cb89b86 100644 --- a/block/io.c +++ b/block/io.c @@ -1868,30 +1868,34 @@ typedef struct BdrvCoBlockStatusData { bool done; } BdrvCoBlockStatusData; -int64_t coroutine_fn bdrv_co_get_block_status_from_file(BlockDriverState *= bs, - int64_t sector_num, - int nb_sectors, - int *pnum, - BlockDriverState *= *file) +int coroutine_fn bdrv_co_block_status_from_file(BlockDriverState *bs, + bool want_zero, + int64_t offset, + int64_t bytes, + int64_t *pnum, + int64_t *map, + BlockDriverState **file) { assert(bs->file && bs->file->bs); - *pnum =3D nb_sectors; + *pnum =3D bytes; + *map =3D offset; *file =3D bs->file->bs; - return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID | - (sector_num << BDRV_SECTOR_BITS); + return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID; } -int64_t coroutine_fn bdrv_co_get_block_status_from_backing(BlockDriverStat= e *bs, - int64_t sector_= num, - int nb_sectors, - int *pnum, - BlockDriverStat= e **file) +int coroutine_fn bdrv_co_block_status_from_backing(BlockDriverState *bs, + bool want_zero, + int64_t offset, + int64_t bytes, + int64_t *pnum, + int64_t *map, + BlockDriverState **file) { assert(bs->backing && bs->backing->bs); - *pnum =3D nb_sectors; + *pnum =3D bytes; + *map =3D offset; *file =3D bs->backing->bs; - return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID | - (sector_num << BDRV_SECTOR_BITS); + return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID; } /* diff --git a/block/blkdebug.c b/block/blkdebug.c index e21669979d..82c30357f8 100644 --- a/block/blkdebug.c +++ b/block/blkdebug.c @@ -627,15 +627,17 @@ static int coroutine_fn blkdebug_co_pdiscard(BlockDri= verState *bs, return bdrv_co_pdiscard(bs->file->bs, offset, bytes); } -static int64_t coroutine_fn blkdebug_co_get_block_status( - BlockDriverState *bs, int64_t sector_num, int nb_sectors, int *pnum, - BlockDriverState **file) +static int coroutine_fn blkdebug_co_block_status(BlockDriverState *bs, + bool want_zero, + int64_t offset, + int64_t bytes, + int64_t *pnum, + int64_t *map, + BlockDriverState **file) { - assert(QEMU_IS_ALIGNED(sector_num | nb_sectors, - DIV_ROUND_UP(bs->bl.request_alignment, - BDRV_SECTOR_SIZE))); - return bdrv_co_get_block_status_from_file(bs, sector_num, nb_sectors, - pnum, file); + assert(QEMU_IS_ALIGNED(offset | bytes, bs->bl.request_alignment)); + return bdrv_co_block_status_from_file(bs, want_zero, offset, bytes, + pnum, map, file); } static void blkdebug_close(BlockDriverState *bs) @@ -907,7 +909,7 @@ 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_block_status =3D blkdebug_co_block_status, .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 bb6c904704..1943c9c3e1 100644 --- a/block/commit.c +++ b/block/commit.c @@ -265,7 +265,7 @@ 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_co_get_block_status_from_backing, + .bdrv_co_block_status =3D bdrv_co_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/mirror.c b/block/mirror.c index c9badc1203..f5bf620942 100644 --- a/block/mirror.c +++ b/block/mirror.c @@ -1094,7 +1094,7 @@ 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_co_get_block_status_from_backing, + .bdrv_co_block_status =3D bdrv_co_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/block/throttle.c b/block/throttle.c index 833175ac77..d1324e7a9f 100644 --- a/block/throttle.c +++ b/block/throttle.c @@ -239,7 +239,7 @@ static BlockDriver bdrv_throttle =3D { .bdrv_reopen_prepare =3D throttle_reopen_prepare, .bdrv_reopen_commit =3D throttle_reopen_commit, .bdrv_reopen_abort =3D throttle_reopen_abort, - .bdrv_co_get_block_status =3D bdrv_co_get_block_status_fro= m_file, + .bdrv_co_block_status =3D bdrv_co_block_status_from_fi= le, .bdrv_co_drain_begin =3D throttle_co_drain_begin, .bdrv_co_drain_end =3D throttle_co_drain_end, --=20 2.14.3 From nobody Sun Oct 5 17:36:07 2025 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.zohomail.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 1515193236664111.17981013918427; Fri, 5 Jan 2018 15:00:36 -0800 (PST) Received: from localhost ([::1]:34588 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXayS-0004N9-C1 for importer@patchew.org; Fri, 05 Jan 2018 18:00:28 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47337) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXawJ-0002sJ-DI for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:16 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eXawG-0008Uj-Aw for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:15 -0500 Received: from mx1.redhat.com ([209.132.183.28]:60072) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eXawC-0008RZ-KG; Fri, 05 Jan 2018 17:58:08 -0500 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id B18605B2FE; Fri, 5 Jan 2018 22:58:07 +0000 (UTC) Received: from red.redhat.com (ovpn-124-124.rdu2.redhat.com [10.10.124.124]) by smtp.corp.redhat.com (Postfix) with ESMTP id 55EA260BE7; Fri, 5 Jan 2018 22:58:06 +0000 (UTC) From: Eric Blake To: qemu-devel@nongnu.org Date: Fri, 5 Jan 2018 16:57:36 -0600 Message-Id: <20180105225753.30509-4-eblake@redhat.com> In-Reply-To: <20180105225753.30509-1-eblake@redhat.com> References: <20180105225753.30509-1-eblake@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.26]); Fri, 05 Jan 2018 22:58:07 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v7 03/20] file-posix: Switch to .bdrv_co_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: kwolf@redhat.com, vsementsov@virtuozzo.com, famz@redhat.com, qemu-block@nongnu.org, jcody@redhat.com, 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" We are gradually moving away from sector-based interfaces, towards byte-based. Update the file protocol driver accordingly. In want_zero mode, we continue to report fine-grained hole information (the caller wants as much mapping detail as possible); but when not in that mode, the caller prefers larger *pnum and merely cares about what offsets are allocated at this layer, rather than where the holes live. Since holes still read as zeroes at this layer (rather than deferring to a backing layer), we can take the shortcut of skipping lseek(), and merely state that all bytes are allocated. We can also drop redundant bounds checks that are already guaranteed by the block layer. Signed-off-by: Eric Blake Reviewed-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Fam Zheng --- v6-v7: no change v5: drop redundant code v4: tweak commit message [Fam], rebase to interface tweak v3: no change v2: tweak comment, add mapping support --- block/file-posix.c | 62 +++++++++++++++++++++++++-------------------------= ---- 1 file changed, 29 insertions(+), 33 deletions(-) diff --git a/block/file-posix.c b/block/file-posix.c index 36ee89e940..e847c7cdd9 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -2128,25 +2128,24 @@ static int find_allocation(BlockDriverState *bs, of= f_t start, } /* - * Returns the allocation status of the specified sectors. + * Returns the allocation status of the specified offset. * - * If 'sector_num' is beyond the end of the disk image the return value is= 0 - * and 'pnum' is set to 0. + * The block layer guarantees 'offset' and 'bytes' are within bounds. * - * 'pnum' is set to the number of sectors (including and immediately follo= wing - * the specified sector) that are known to be in the same + * 'pnum' is set to the number of bytes (including and immediately followi= ng + * the specified offset) that are known to be in the same * allocated/unallocated state. * - * 'nb_sectors' is the max value 'pnum' should be set to. If nb_sectors g= oes - * beyond the end of the disk image it will be clamped. + * 'bytes' is the max value 'pnum' should be set to. */ -static int64_t coroutine_fn raw_co_get_block_status(BlockDriverState *bs, - int64_t sector_num, - int nb_sectors, int *p= num, - BlockDriverState **fil= e) +static int coroutine_fn raw_co_block_status(BlockDriverState *bs, + bool want_zero, + int64_t offset, + int64_t bytes, int64_t *pnum, + int64_t *map, + BlockDriverState **file) { - off_t start, data =3D 0, hole =3D 0; - int64_t total_size; + off_t data =3D 0, hole =3D 0; int ret; ret =3D fd_open(bs); @@ -2154,39 +2153,36 @@ static int64_t coroutine_fn raw_co_get_block_status= (BlockDriverState *bs, return ret; } - start =3D sector_num * BDRV_SECTOR_SIZE; - total_size =3D bdrv_getlength(bs); - if (total_size < 0) { - return total_size; - } else if (start >=3D total_size) { - *pnum =3D 0; - return 0; - } else if (start + nb_sectors * BDRV_SECTOR_SIZE > total_size) { - nb_sectors =3D DIV_ROUND_UP(total_size - start, BDRV_SECTOR_SIZE); + if (!want_zero) { + *pnum =3D bytes; + *map =3D offset; + *file =3D bs; + return BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID; } - ret =3D find_allocation(bs, start, &data, &hole); + ret =3D find_allocation(bs, offset, &data, &hole); if (ret =3D=3D -ENXIO) { /* Trailing hole */ - *pnum =3D nb_sectors; + *pnum =3D bytes; ret =3D BDRV_BLOCK_ZERO; } else if (ret < 0) { /* No info available, so pretend there are no holes */ - *pnum =3D nb_sectors; + *pnum =3D bytes; ret =3D BDRV_BLOCK_DATA; - } else if (data =3D=3D start) { - /* On a data extent, compute sectors to the end of the extent, + } else if (data =3D=3D offset) { + /* On a data extent, compute bytes to the end of the extent, * possibly including a partial sector at EOF. */ - *pnum =3D MIN(nb_sectors, DIV_ROUND_UP(hole - start, BDRV_SECTOR_S= IZE)); + *pnum =3D MIN(bytes, hole - offset); ret =3D BDRV_BLOCK_DATA; } else { - /* On a hole, compute sectors to the beginning of the next extent.= */ - assert(hole =3D=3D start); - *pnum =3D MIN(nb_sectors, (data - start) / BDRV_SECTOR_SIZE); + /* On a hole, compute bytes to the beginning of the next extent. = */ + assert(hole =3D=3D offset); + *pnum =3D MIN(bytes, data - offset); ret =3D BDRV_BLOCK_ZERO; } + *map =3D offset; *file =3D bs; - return ret | BDRV_BLOCK_OFFSET_VALID | start; + return ret | BDRV_BLOCK_OFFSET_VALID; } static coroutine_fn BlockAIOCB *raw_aio_pdiscard(BlockDriverState *bs, @@ -2280,7 +2276,7 @@ BlockDriver bdrv_file =3D { .bdrv_close =3D raw_close, .bdrv_create =3D raw_create, .bdrv_has_zero_init =3D bdrv_has_zero_init_1, - .bdrv_co_get_block_status =3D raw_co_get_block_status, + .bdrv_co_block_status =3D raw_co_block_status, .bdrv_co_pwrite_zeroes =3D raw_co_pwrite_zeroes, .bdrv_co_preadv =3D raw_co_preadv, --=20 2.14.3 From nobody Sun Oct 5 17:36:07 2025 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.zohomail.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 151519351319644.21537216349839; Fri, 5 Jan 2018 15:05:13 -0800 (PST) Received: from localhost ([::1]:34620 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXb32-0000rg-B4 for importer@patchew.org; Fri, 05 Jan 2018 18:05:12 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47378) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXawL-0002ta-0a for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:18 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eXawJ-00004v-Ga for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:16 -0500 Received: from mx1.redhat.com ([209.132.183.28]:48680) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eXawE-0008Sh-A5; Fri, 05 Jan 2018 17:58:10 -0500 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 569ED130F; Fri, 5 Jan 2018 22:58:09 +0000 (UTC) Received: from red.redhat.com (ovpn-124-124.rdu2.redhat.com [10.10.124.124]) by smtp.corp.redhat.com (Postfix) with ESMTP id F00C360BE7; Fri, 5 Jan 2018 22:58:07 +0000 (UTC) From: Eric Blake To: qemu-devel@nongnu.org Date: Fri, 5 Jan 2018 16:57:37 -0600 Message-Id: <20180105225753.30509-5-eblake@redhat.com> In-Reply-To: <20180105225753.30509-1-eblake@redhat.com> References: <20180105225753.30509-1-eblake@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Fri, 05 Jan 2018 22:58:09 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v7 04/20] gluster: Switch to .bdrv_co_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: kwolf@redhat.com, vsementsov@virtuozzo.com, famz@redhat.com, qemu-block@nongnu.org, jcody@redhat.com, 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" We are gradually moving away from sector-based interfaces, towards byte-based. Update the gluster driver accordingly. In want_zero mode, we continue to report fine-grained hole information (the caller wants as much mapping detail as possible); but when not in that mode, the caller prefers larger *pnum and merely cares about what offsets are allocated at this layer, rather than where the holes live. Since holes still read as zeroes at this layer (rather than deferring to a backing layer), we can take the shortcut of skipping find_allocation(), and merely state that all bytes are allocated. We can also drop redundant bounds checks that are already guaranteed by the block layer. Signed-off-by: Eric Blake Reviewed-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Fam Zheng --- v6-v7: no change v5: drop redundant code v4: tweak commit message [Fam], rebase to interface tweak v3: no change v2: tweak comments [Prasanna], add mapping, drop R-b --- block/gluster.c | 70 ++++++++++++++++++++++++++++-------------------------= ---- 1 file changed, 34 insertions(+), 36 deletions(-) diff --git a/block/gluster.c b/block/gluster.c index 0f4265a3a4..6388ced82e 100644 --- a/block/gluster.c +++ b/block/gluster.c @@ -1349,68 +1349,66 @@ exit: } /* - * Returns the allocation status of the specified sectors. + * Returns the allocation status of the specified offset. * - * If 'sector_num' is beyond the end of the disk image the return value is= 0 - * and 'pnum' is set to 0. + * The block layer guarantees 'offset' and 'bytes' are within bounds. * - * 'pnum' is set to the number of sectors (including and immediately follo= wing - * the specified sector) that are known to be in the same + * 'pnum' is set to the number of bytes (including and immediately followi= ng + * the specified offset) that are known to be in the same * allocated/unallocated state. * - * 'nb_sectors' is the max value 'pnum' should be set to. If nb_sectors g= oes - * beyond the end of the disk image it will be clamped. + * 'bytes' is the max value 'pnum' should be set to. * - * (Based on raw_co_get_block_status() from file-posix.c.) + * (Based on raw_co_block_status() from file-posix.c.) */ -static int64_t coroutine_fn qemu_gluster_co_get_block_status( - BlockDriverState *bs, int64_t sector_num, int nb_sectors, int *pnu= m, - BlockDriverState **file) +static int coroutine_fn qemu_gluster_co_block_status(BlockDriverState *bs, + bool want_zero, + int64_t offset, + int64_t bytes, + int64_t *pnum, + int64_t *map, + BlockDriverState **fi= le) { BDRVGlusterState *s =3D bs->opaque; - off_t start, data =3D 0, hole =3D 0; - int64_t total_size; + off_t data =3D 0, hole =3D 0; int ret =3D -EINVAL; if (!s->fd) { return ret; } - start =3D sector_num * BDRV_SECTOR_SIZE; - total_size =3D bdrv_getlength(bs); - if (total_size < 0) { - return total_size; - } else if (start >=3D total_size) { - *pnum =3D 0; - return 0; - } else if (start + nb_sectors * BDRV_SECTOR_SIZE > total_size) { - nb_sectors =3D DIV_ROUND_UP(total_size - start, BDRV_SECTOR_SIZE); + if (!want_zero) { + *pnum =3D bytes; + *map =3D offset; + *file =3D bs; + return BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID; } - ret =3D find_allocation(bs, start, &data, &hole); + ret =3D find_allocation(bs, offset, &data, &hole); if (ret =3D=3D -ENXIO) { /* Trailing hole */ - *pnum =3D nb_sectors; + *pnum =3D bytes; ret =3D BDRV_BLOCK_ZERO; } else if (ret < 0) { /* No info available, so pretend there are no holes */ - *pnum =3D nb_sectors; + *pnum =3D bytes; ret =3D BDRV_BLOCK_DATA; - } else if (data =3D=3D start) { - /* On a data extent, compute sectors to the end of the extent, + } else if (data =3D=3D offset) { + /* On a data extent, compute bytes to the end of the extent, * possibly including a partial sector at EOF. */ - *pnum =3D MIN(nb_sectors, DIV_ROUND_UP(hole - start, BDRV_SECTOR_S= IZE)); + *pnum =3D MIN(bytes, hole - offset); ret =3D BDRV_BLOCK_DATA; } else { - /* On a hole, compute sectors to the beginning of the next extent.= */ - assert(hole =3D=3D start); - *pnum =3D MIN(nb_sectors, (data - start) / BDRV_SECTOR_SIZE); + /* On a hole, compute bytes to the beginning of the next extent. = */ + assert(hole =3D=3D offset); + *pnum =3D MIN(bytes, data - offset); ret =3D BDRV_BLOCK_ZERO; } + *map =3D offset; *file =3D bs; - return ret | BDRV_BLOCK_OFFSET_VALID | start; + return ret | BDRV_BLOCK_OFFSET_VALID; } @@ -1438,7 +1436,7 @@ static BlockDriver bdrv_gluster =3D { #ifdef CONFIG_GLUSTERFS_ZEROFILL .bdrv_co_pwrite_zeroes =3D qemu_gluster_co_pwrite_zeroes, #endif - .bdrv_co_get_block_status =3D qemu_gluster_co_get_block_status, + .bdrv_co_block_status =3D qemu_gluster_co_block_status, .create_opts =3D &qemu_gluster_create_opts, }; @@ -1466,7 +1464,7 @@ static BlockDriver bdrv_gluster_tcp =3D { #ifdef CONFIG_GLUSTERFS_ZEROFILL .bdrv_co_pwrite_zeroes =3D qemu_gluster_co_pwrite_zeroes, #endif - .bdrv_co_get_block_status =3D qemu_gluster_co_get_block_status, + .bdrv_co_block_status =3D qemu_gluster_co_block_status, .create_opts =3D &qemu_gluster_create_opts, }; @@ -1494,7 +1492,7 @@ static BlockDriver bdrv_gluster_unix =3D { #ifdef CONFIG_GLUSTERFS_ZEROFILL .bdrv_co_pwrite_zeroes =3D qemu_gluster_co_pwrite_zeroes, #endif - .bdrv_co_get_block_status =3D qemu_gluster_co_get_block_status, + .bdrv_co_block_status =3D qemu_gluster_co_block_status, .create_opts =3D &qemu_gluster_create_opts, }; @@ -1528,7 +1526,7 @@ static BlockDriver bdrv_gluster_rdma =3D { #ifdef CONFIG_GLUSTERFS_ZEROFILL .bdrv_co_pwrite_zeroes =3D qemu_gluster_co_pwrite_zeroes, #endif - .bdrv_co_get_block_status =3D qemu_gluster_co_get_block_status, + .bdrv_co_block_status =3D qemu_gluster_co_block_status, .create_opts =3D &qemu_gluster_create_opts, }; --=20 2.14.3 From nobody Sun Oct 5 17:36:07 2025 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.zohomail.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 1515193445095383.05982127484276; Fri, 5 Jan 2018 15:04:05 -0800 (PST) Received: from localhost ([::1]:34618 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXb1w-00088l-5G for importer@patchew.org; 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Fri, 5 Jan 2018 22:58:09 +0000 (UTC) From: Eric Blake To: qemu-devel@nongnu.org Date: Fri, 5 Jan 2018 16:57:38 -0600 Message-Id: <20180105225753.30509-6-eblake@redhat.com> In-Reply-To: <20180105225753.30509-1-eblake@redhat.com> References: <20180105225753.30509-1-eblake@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.26]); Fri, 05 Jan 2018 22:58:11 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v7 05/20] iscsi: Switch cluster_sectors to byte-based 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: kwolf@redhat.com, vsementsov@virtuozzo.com, famz@redhat.com, qemu-block@nongnu.org, jcody@redhat.com, Peter Lieven , Max Reitz , Ronnie Sahlberg , Paolo Bonzini 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" We are gradually converting to byte-based interfaces, as they are easier to reason about than sector-based. Convert all uses of the cluster size in sectors, along with adding assertions that we are not dividing by zero. Improve some comment grammar while in the area. Signed-off-by: Eric Blake Acked-by: Paolo Bonzini Reviewed-by: Fam Zheng --- v2-v7: no change --- block/iscsi.c | 56 +++++++++++++++++++++++++++++++++++--------------------- 1 file changed, 35 insertions(+), 21 deletions(-) diff --git a/block/iscsi.c b/block/iscsi.c index 5c0a9e55b6..7b03da54ee 100644 --- a/block/iscsi.c +++ b/block/iscsi.c @@ -84,7 +84,7 @@ typedef struct IscsiLun { unsigned long *allocmap; unsigned long *allocmap_valid; long allocmap_size; - int cluster_sectors; + int cluster_size; bool use_16_for_rw; bool write_protected; bool lbpme; @@ -428,9 +428,10 @@ static int iscsi_allocmap_init(IscsiLun *iscsilun, int= open_flags) { iscsi_allocmap_free(iscsilun); + assert(iscsilun->cluster_size); iscsilun->allocmap_size =3D - DIV_ROUND_UP(sector_lun2qemu(iscsilun->num_blocks, iscsilun), - iscsilun->cluster_sectors); + DIV_ROUND_UP(iscsilun->num_blocks * iscsilun->block_size, + iscsilun->cluster_size); iscsilun->allocmap =3D bitmap_try_new(iscsilun->allocmap_size); if (!iscsilun->allocmap) { @@ -438,7 +439,7 @@ static int iscsi_allocmap_init(IscsiLun *iscsilun, int = open_flags) } if (open_flags & BDRV_O_NOCACHE) { - /* in case that cache.direct =3D on all allocmap entries are + /* when cache.direct =3D on all allocmap entries are * treated as invalid to force a relookup of the block * status on every read request */ return 0; @@ -459,17 +460,19 @@ iscsi_allocmap_update(IscsiLun *iscsilun, int64_t sec= tor_num, int nb_sectors, bool allocated, bool valid) { int64_t cl_num_expanded, nb_cls_expanded, cl_num_shrunk, nb_cls_shrunk; + int cluster_sectors =3D iscsilun->cluster_size >> BDRV_SECTOR_BITS; if (iscsilun->allocmap =3D=3D NULL) { return; } /* expand to entirely contain all affected clusters */ - cl_num_expanded =3D sector_num / iscsilun->cluster_sectors; + assert(cluster_sectors); + cl_num_expanded =3D sector_num / cluster_sectors; nb_cls_expanded =3D DIV_ROUND_UP(sector_num + nb_sectors, - iscsilun->cluster_sectors) - cl_num_exp= anded; + cluster_sectors) - cl_num_expanded; /* shrink to touch only completely contained clusters */ - cl_num_shrunk =3D DIV_ROUND_UP(sector_num, iscsilun->cluster_sectors); - nb_cls_shrunk =3D (sector_num + nb_sectors) / iscsilun->cluster_sectors + cl_num_shrunk =3D DIV_ROUND_UP(sector_num, cluster_sectors); + nb_cls_shrunk =3D (sector_num + nb_sectors) / cluster_sectors - cl_num_shrunk; if (allocated) { bitmap_set(iscsilun->allocmap, cl_num_expanded, nb_cls_expanded); @@ -533,9 +536,12 @@ iscsi_allocmap_is_allocated(IscsiLun *iscsilun, int64_= t sector_num, if (iscsilun->allocmap =3D=3D NULL) { return true; } - size =3D DIV_ROUND_UP(sector_num + nb_sectors, iscsilun->cluster_secto= rs); + assert(iscsilun->cluster_size); + size =3D DIV_ROUND_UP(sector_num + nb_sectors, + iscsilun->cluster_size >> BDRV_SECTOR_BITS); return !(find_next_bit(iscsilun->allocmap, size, - sector_num / iscsilun->cluster_sectors) =3D=3D = size); + sector_num * BDRV_SECTOR_SIZE / + iscsilun->cluster_size) =3D=3D size); } static inline bool iscsi_allocmap_is_valid(IscsiLun *iscsilun, @@ -545,9 +551,12 @@ static inline bool iscsi_allocmap_is_valid(IscsiLun *i= scsilun, if (iscsilun->allocmap_valid =3D=3D NULL) { return false; } - size =3D DIV_ROUND_UP(sector_num + nb_sectors, iscsilun->cluster_secto= rs); + assert(iscsilun->cluster_size); + size =3D DIV_ROUND_UP(sector_num + nb_sectors, + iscsilun->cluster_size >> BDRV_SECTOR_BITS); return (find_next_zero_bit(iscsilun->allocmap_valid, size, - sector_num / iscsilun->cluster_sectors) =3D= =3D size); + sector_num * BDRV_SECTOR_SIZE / + iscsilun->cluster_size) =3D=3D size); } static int coroutine_fn @@ -790,16 +799,21 @@ static int coroutine_fn iscsi_co_readv(BlockDriverSta= te *bs, BlockDriverState *file; /* check the block status from the beginning of the cluster * containing the start sector */ - int64_t ret =3D iscsi_co_get_block_status(bs, - sector_num - sector_num % iscsilun->cluster_sect= ors, - BDRV_REQUEST_MAX_SECTORS, &pnum, &file); + int cluster_sectors =3D iscsilun->cluster_size >> BDRV_SECTOR_BITS; + int head; + int64_t ret; + + assert(cluster_sectors); + head =3D sector_num % cluster_sectors; + ret =3D iscsi_co_get_block_status(bs, sector_num - head, + BDRV_REQUEST_MAX_SECTORS, &pnum, + &file); if (ret < 0) { return ret; } /* if the whole request falls into an unallocated area we can avoid - * to read and directly return zeroes instead */ - if (ret & BDRV_BLOCK_ZERO && - pnum >=3D nb_sectors + sector_num % iscsilun->cluster_sectors)= { + * reading and directly return zeroes instead */ + if (ret & BDRV_BLOCK_ZERO && pnum >=3D nb_sectors + head) { qemu_iovec_memset(iov, 0, 0x00, iov->size); return 0; } @@ -1951,8 +1965,8 @@ static int iscsi_open(BlockDriverState *bs, QDict *op= tions, int flags, * reasonable size */ if (iscsilun->bl.opt_unmap_gran * iscsilun->block_size >=3D 4 * 1024 && iscsilun->bl.opt_unmap_gran * iscsilun->block_size <=3D 16 * 1024 = * 1024) { - iscsilun->cluster_sectors =3D (iscsilun->bl.opt_unmap_gran * - iscsilun->block_size) >> BDRV_SECTOR_= BITS; + iscsilun->cluster_size =3D iscsilun->bl.opt_unmap_gran * + iscsilun->block_size; if (iscsilun->lbprz) { ret =3D iscsi_allocmap_init(iscsilun, bs->open_flags); } @@ -2158,7 +2172,7 @@ static int iscsi_get_info(BlockDriverState *bs, Block= DriverInfo *bdi) IscsiLun *iscsilun =3D bs->opaque; bdi->unallocated_blocks_are_zero =3D iscsilun->lbprz; bdi->can_write_zeroes_with_unmap =3D iscsilun->lbprz && iscsilun->lbp.= lbpws; - bdi->cluster_size =3D iscsilun->cluster_sectors * BDRV_SECTOR_SIZE; + bdi->cluster_size =3D iscsilun->cluster_size; return 0; } --=20 2.14.3 From nobody Sun Oct 5 17:36:07 2025 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.zohomail.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 1515193628934765.430216666227; Fri, 5 Jan 2018 15:07:08 -0800 (PST) Received: from localhost ([::1]:34646 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXb4r-0002YA-OT for importer@patchew.org; Fri, 05 Jan 2018 18:07:05 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47411) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXawM-0002w4-Uz for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:20 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eXawL-00006q-L7 for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:19 -0500 Received: from mx1.redhat.com ([209.132.183.28]:47966) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eXawI-0008Vd-5I; Fri, 05 Jan 2018 17:58:14 -0500 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 3655B4ACBB; Fri, 5 Jan 2018 22:58:13 +0000 (UTC) Received: from red.redhat.com (ovpn-124-124.rdu2.redhat.com [10.10.124.124]) by smtp.corp.redhat.com (Postfix) with ESMTP id A2F1B60C90; Fri, 5 Jan 2018 22:58:11 +0000 (UTC) From: Eric Blake To: qemu-devel@nongnu.org Date: Fri, 5 Jan 2018 16:57:39 -0600 Message-Id: <20180105225753.30509-7-eblake@redhat.com> In-Reply-To: <20180105225753.30509-1-eblake@redhat.com> References: <20180105225753.30509-1-eblake@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Fri, 05 Jan 2018 22:58:13 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v7 06/20] iscsi: Switch iscsi_allocmap_update() to byte-based 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: kwolf@redhat.com, vsementsov@virtuozzo.com, famz@redhat.com, qemu-block@nongnu.org, jcody@redhat.com, Peter Lieven , Max Reitz , Ronnie Sahlberg , Paolo Bonzini 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" We are gradually converting to byte-based interfaces, as they are easier to reason about than sector-based. Convert all uses of the allocmap (no semantic change). Callers that already had bytes available are simpler, and callers that now scale to bytes will be easier to switch to byte-based in the future. Signed-off-by: Eric Blake Acked-by: Paolo Bonzini Reviewed-by: Fam Zheng --- v7: rebase to master, simple enough to keep ack v3-v6: no change v2: rebase to count/bytes rename --- block/iscsi.c | 90 +++++++++++++++++++++++++++++--------------------------= ---- 1 file changed, 44 insertions(+), 46 deletions(-) diff --git a/block/iscsi.c b/block/iscsi.c index 7b03da54ee..a823cdcb0b 100644 --- a/block/iscsi.c +++ b/block/iscsi.c @@ -456,24 +456,22 @@ static int iscsi_allocmap_init(IscsiLun *iscsilun, in= t open_flags) } static void -iscsi_allocmap_update(IscsiLun *iscsilun, int64_t sector_num, - int nb_sectors, bool allocated, bool valid) +iscsi_allocmap_update(IscsiLun *iscsilun, int64_t offset, + int64_t bytes, bool allocated, bool valid) { int64_t cl_num_expanded, nb_cls_expanded, cl_num_shrunk, nb_cls_shrunk; - int cluster_sectors =3D iscsilun->cluster_size >> BDRV_SECTOR_BITS; if (iscsilun->allocmap =3D=3D NULL) { return; } /* expand to entirely contain all affected clusters */ - assert(cluster_sectors); - cl_num_expanded =3D sector_num / cluster_sectors; - nb_cls_expanded =3D DIV_ROUND_UP(sector_num + nb_sectors, - cluster_sectors) - cl_num_expanded; + assert(iscsilun->cluster_size); + cl_num_expanded =3D offset / iscsilun->cluster_size; + nb_cls_expanded =3D DIV_ROUND_UP(offset + bytes, + iscsilun->cluster_size) - cl_num_expand= ed; /* shrink to touch only completely contained clusters */ - cl_num_shrunk =3D DIV_ROUND_UP(sector_num, cluster_sectors); - nb_cls_shrunk =3D (sector_num + nb_sectors) / cluster_sectors - - cl_num_shrunk; + cl_num_shrunk =3D DIV_ROUND_UP(offset, iscsilun->cluster_size); + nb_cls_shrunk =3D (offset + bytes) / iscsilun->cluster_size - cl_num_s= hrunk; if (allocated) { bitmap_set(iscsilun->allocmap, cl_num_expanded, nb_cls_expanded); } else { @@ -496,26 +494,26 @@ iscsi_allocmap_update(IscsiLun *iscsilun, int64_t sec= tor_num, } static void -iscsi_allocmap_set_allocated(IscsiLun *iscsilun, int64_t sector_num, - int nb_sectors) +iscsi_allocmap_set_allocated(IscsiLun *iscsilun, int64_t offset, + int64_t bytes) { - iscsi_allocmap_update(iscsilun, sector_num, nb_sectors, true, true); + iscsi_allocmap_update(iscsilun, offset, bytes, true, true); } static void -iscsi_allocmap_set_unallocated(IscsiLun *iscsilun, int64_t sector_num, - int nb_sectors) +iscsi_allocmap_set_unallocated(IscsiLun *iscsilun, int64_t offset, + int64_t bytes) { /* Note: if cache.direct=3Don the fifth argument to iscsi_allocmap_upd= ate * is ignored, so this will in effect be an iscsi_allocmap_set_invalid. */ - iscsi_allocmap_update(iscsilun, sector_num, nb_sectors, false, true); + iscsi_allocmap_update(iscsilun, offset, bytes, false, true); } -static void iscsi_allocmap_set_invalid(IscsiLun *iscsilun, int64_t sector_= num, - int nb_sectors) +static void iscsi_allocmap_set_invalid(IscsiLun *iscsilun, int64_t offset, + int64_t bytes) { - iscsi_allocmap_update(iscsilun, sector_num, nb_sectors, false, false); + iscsi_allocmap_update(iscsilun, offset, bytes, false, false); } static void iscsi_allocmap_invalidate(IscsiLun *iscsilun) @@ -529,34 +527,30 @@ static void iscsi_allocmap_invalidate(IscsiLun *iscsi= lun) } static inline bool -iscsi_allocmap_is_allocated(IscsiLun *iscsilun, int64_t sector_num, - int nb_sectors) +iscsi_allocmap_is_allocated(IscsiLun *iscsilun, int64_t offset, + int64_t bytes) { unsigned long size; if (iscsilun->allocmap =3D=3D NULL) { return true; } assert(iscsilun->cluster_size); - size =3D DIV_ROUND_UP(sector_num + nb_sectors, - iscsilun->cluster_size >> BDRV_SECTOR_BITS); + size =3D DIV_ROUND_UP(offset + bytes, iscsilun->cluster_size); return !(find_next_bit(iscsilun->allocmap, size, - sector_num * BDRV_SECTOR_SIZE / - iscsilun->cluster_size) =3D=3D size); + offset / iscsilun->cluster_size) =3D=3D size); } static inline bool iscsi_allocmap_is_valid(IscsiLun *iscsilun, - int64_t sector_num, int nb_sect= ors) + int64_t offset, int64_t bytes) { unsigned long size; if (iscsilun->allocmap_valid =3D=3D NULL) { return false; } assert(iscsilun->cluster_size); - size =3D DIV_ROUND_UP(sector_num + nb_sectors, - iscsilun->cluster_size >> BDRV_SECTOR_BITS); + size =3D DIV_ROUND_UP(offset + bytes, iscsilun->cluster_size); return (find_next_zero_bit(iscsilun->allocmap_valid, size, - sector_num * BDRV_SECTOR_SIZE / - iscsilun->cluster_size) =3D=3D size); + offset / iscsilun->cluster_size) =3D=3D siz= e); } static int coroutine_fn @@ -638,14 +632,16 @@ retry: } if (iTask.status !=3D SCSI_STATUS_GOOD) { - iscsi_allocmap_set_invalid(iscsilun, sector_num, nb_sectors); + iscsi_allocmap_set_invalid(iscsilun, sector_num * BDRV_SECTOR_SIZE, + nb_sectors * BDRV_SECTOR_SIZE); error_report("iSCSI WRITE10/16 failed at lba %" PRIu64 ": %s", lba, iTask.err_str); r =3D iTask.err_code; goto out_unlock; } - iscsi_allocmap_set_allocated(iscsilun, sector_num, nb_sectors); + iscsi_allocmap_set_allocated(iscsilun, sector_num * BDRV_SECTOR_SIZE, + nb_sectors * BDRV_SECTOR_SIZE); out_unlock: qemu_mutex_unlock(&iscsilun->mutex); @@ -744,9 +740,11 @@ retry: } if (ret & BDRV_BLOCK_ZERO) { - iscsi_allocmap_set_unallocated(iscsilun, sector_num, *pnum); + iscsi_allocmap_set_unallocated(iscsilun, sector_num * BDRV_SECTOR_= SIZE, + *pnum * BDRV_SECTOR_SIZE); } else { - iscsi_allocmap_set_allocated(iscsilun, sector_num, *pnum); + iscsi_allocmap_set_allocated(iscsilun, sector_num * BDRV_SECTOR_SI= ZE, + *pnum * BDRV_SECTOR_SIZE); } if (*pnum > nb_sectors) { @@ -786,15 +784,19 @@ static int coroutine_fn iscsi_co_readv(BlockDriverSta= te *bs, /* if cache.direct is off and we have a valid entry in our allocation = map * we can skip checking the block status and directly return zeroes if * the request falls within an unallocated area */ - if (iscsi_allocmap_is_valid(iscsilun, sector_num, nb_sectors) && - !iscsi_allocmap_is_allocated(iscsilun, sector_num, nb_sectors)) { + if (iscsi_allocmap_is_valid(iscsilun, sector_num * BDRV_SECTOR_SIZE, + nb_sectors * BDRV_SECTOR_SIZE) && + !iscsi_allocmap_is_allocated(iscsilun, sector_num * BDRV_SECTOR_SI= ZE, + nb_sectors * BDRV_SECTOR_SIZE)) { qemu_iovec_memset(iov, 0, 0x00, iov->size); return 0; } if (nb_sectors >=3D ISCSI_CHECKALLOC_THRES && - !iscsi_allocmap_is_valid(iscsilun, sector_num, nb_sectors) && - !iscsi_allocmap_is_allocated(iscsilun, sector_num, nb_sectors)) { + !iscsi_allocmap_is_valid(iscsilun, sector_num * BDRV_SECTOR_SIZE, + nb_sectors * BDRV_SECTOR_SIZE) && + !iscsi_allocmap_is_allocated(iscsilun, sector_num * BDRV_SECTOR_SI= ZE, + nb_sectors * BDRV_SECTOR_SIZE)) { int pnum; BlockDriverState *file; /* check the block status from the beginning of the cluster @@ -1157,8 +1159,7 @@ retry: goto retry; } - iscsi_allocmap_set_invalid(iscsilun, offset >> BDRV_SECTOR_BITS, - bytes >> BDRV_SECTOR_BITS); + iscsi_allocmap_set_invalid(iscsilun, offset, bytes); if (iTask.status =3D=3D SCSI_STATUS_CHECK_CONDITION) { /* the target might fail with a check condition if it @@ -1271,8 +1272,7 @@ retry: } if (iTask.status !=3D SCSI_STATUS_GOOD) { - iscsi_allocmap_set_invalid(iscsilun, offset >> BDRV_SECTOR_BITS, - bytes >> BDRV_SECTOR_BITS); + iscsi_allocmap_set_invalid(iscsilun, offset, bytes); error_report("iSCSI WRITESAME10/16 failed at lba %" PRIu64 ": %s", lba, iTask.err_str); r =3D iTask.err_code; @@ -1280,11 +1280,9 @@ retry: } if (flags & BDRV_REQ_MAY_UNMAP) { - iscsi_allocmap_set_invalid(iscsilun, offset >> BDRV_SECTOR_BITS, - bytes >> BDRV_SECTOR_BITS); + iscsi_allocmap_set_invalid(iscsilun, offset, bytes); } else { - iscsi_allocmap_set_allocated(iscsilun, offset >> BDRV_SECTOR_BITS, - bytes >> BDRV_SECTOR_BITS); + iscsi_allocmap_set_allocated(iscsilun, offset, bytes); } out_unlock: --=20 2.14.3 From nobody Sun Oct 5 17:36:07 2025 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.zohomail.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 1515193268604722.7136240393804; Fri, 5 Jan 2018 15:01:08 -0800 (PST) Received: from localhost ([::1]:34595 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXaz5-0005Gq-Ir for importer@patchew.org; Fri, 05 Jan 2018 18:01:07 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47509) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXawU-000337-IG for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:27 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eXawQ-0000AZ-4y for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:26 -0500 Received: from mx1.redhat.com ([209.132.183.28]:60156) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eXawM-000074-HP; Fri, 05 Jan 2018 17:58:18 -0500 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 7E1717CB8B; Fri, 5 Jan 2018 22:58:17 +0000 (UTC) Received: from red.redhat.com (ovpn-124-124.rdu2.redhat.com [10.10.124.124]) by smtp.corp.redhat.com (Postfix) with ESMTP id 75F0760BE7; Fri, 5 Jan 2018 22:58:13 +0000 (UTC) From: Eric Blake To: qemu-devel@nongnu.org Date: Fri, 5 Jan 2018 16:57:40 -0600 Message-Id: <20180105225753.30509-8-eblake@redhat.com> In-Reply-To: <20180105225753.30509-1-eblake@redhat.com> References: <20180105225753.30509-1-eblake@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.26]); Fri, 05 Jan 2018 22:58:17 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v7 07/20] iscsi: Switch to .bdrv_co_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: kwolf@redhat.com, vsementsov@virtuozzo.com, famz@redhat.com, qemu-block@nongnu.org, jcody@redhat.com, Peter Lieven , Max Reitz , Ronnie Sahlberg , Paolo Bonzini 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" We are gradually moving away from sector-based interfaces, towards byte-based. Update the iscsi driver accordingly. In this case, it is handy to teach iscsi_co_block_status() to handle a NULL map and file parameter, even though the block layer passes non-NULL values, because we also call the function directly. For now, there are no optimizations done based on the want_zero flag. We can also make the simplification of asserting that the block layer passed in aligned values. Signed-off-by: Eric Blake Reviewed-by: Fam Zheng --- v7: rebase to master v6: no change v5: assert rather than check for alignment v4: rebase to interface tweaks v3: no change v2: rebase to mapping parameter --- block/iscsi.c | 67 ++++++++++++++++++++++++++++---------------------------= ---- 1 file changed, 32 insertions(+), 35 deletions(-) diff --git a/block/iscsi.c b/block/iscsi.c index a823cdcb0b..ea4cc08b0c 100644 --- a/block/iscsi.c +++ b/block/iscsi.c @@ -651,34 +651,34 @@ out_unlock: -static int64_t coroutine_fn iscsi_co_get_block_status(BlockDriverState *bs, - int64_t sector_num, - int nb_sectors, int *pnu= m, - BlockDriverState **file) +static int coroutine_fn iscsi_co_block_status(BlockDriverState *bs, + bool want_zero, int64_t offs= et, + int64_t bytes, int64_t *pnum, + int64_t *map, + BlockDriverState **file) { IscsiLun *iscsilun =3D bs->opaque; struct scsi_get_lba_status *lbas =3D NULL; struct scsi_lba_status_descriptor *lbasd =3D NULL; struct IscsiTask iTask; uint64_t lba; - int64_t ret; + int ret; - if (!is_sector_request_lun_aligned(sector_num, nb_sectors, iscsilun)) { - ret =3D -EINVAL; - goto out; - } + assert(QEMU_IS_ALIGNED(offset | bytes, iscsilun->block_size)); /* default to all sectors allocated */ - ret =3D BDRV_BLOCK_DATA; - ret |=3D (sector_num << BDRV_SECTOR_BITS) | BDRV_BLOCK_OFFSET_VALID; - *pnum =3D nb_sectors; + ret =3D BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID; + if (map) { + *map =3D offset; + } + *pnum =3D bytes; /* LUN does not support logical block provisioning */ if (!iscsilun->lbpme) { goto out; } - lba =3D sector_qemu2lun(sector_num, iscsilun); + lba =3D offset / iscsilun->block_size; iscsi_co_init_iscsitask(iscsilun, &iTask); qemu_mutex_lock(&iscsilun->mutex); @@ -724,12 +724,12 @@ retry: lbasd =3D &lbas->descriptors[0]; - if (sector_qemu2lun(sector_num, iscsilun) !=3D lbasd->lba) { + if (lba !=3D lbasd->lba) { ret =3D -EIO; goto out_unlock; } - *pnum =3D sector_lun2qemu(lbasd->num_blocks, iscsilun); + *pnum =3D lbasd->num_blocks * iscsilun->block_size; if (lbasd->provisioning =3D=3D SCSI_PROVISIONING_TYPE_DEALLOCATED || lbasd->provisioning =3D=3D SCSI_PROVISIONING_TYPE_ANCHORED) { @@ -740,15 +740,13 @@ retry: } if (ret & BDRV_BLOCK_ZERO) { - iscsi_allocmap_set_unallocated(iscsilun, sector_num * BDRV_SECTOR_= SIZE, - *pnum * BDRV_SECTOR_SIZE); + iscsi_allocmap_set_unallocated(iscsilun, offset, *pnum); } else { - iscsi_allocmap_set_allocated(iscsilun, sector_num * BDRV_SECTOR_SI= ZE, - *pnum * BDRV_SECTOR_SIZE); + iscsi_allocmap_set_allocated(iscsilun, offset, *pnum); } - if (*pnum > nb_sectors) { - *pnum =3D nb_sectors; + if (*pnum > bytes) { + *pnum =3D bytes; } out_unlock: qemu_mutex_unlock(&iscsilun->mutex); @@ -757,7 +755,7 @@ out: if (iTask.task !=3D NULL) { scsi_free_scsi_task(iTask.task); } - if (ret > 0 && ret & BDRV_BLOCK_OFFSET_VALID) { + if (ret > 0 && ret & BDRV_BLOCK_OFFSET_VALID && file) { *file =3D bs; } return ret; @@ -797,25 +795,24 @@ static int coroutine_fn iscsi_co_readv(BlockDriverSta= te *bs, nb_sectors * BDRV_SECTOR_SIZE) && !iscsi_allocmap_is_allocated(iscsilun, sector_num * BDRV_SECTOR_SI= ZE, nb_sectors * BDRV_SECTOR_SIZE)) { - int pnum; - BlockDriverState *file; + int64_t pnum; /* check the block status from the beginning of the cluster * containing the start sector */ - int cluster_sectors =3D iscsilun->cluster_size >> BDRV_SECTOR_BITS; - int head; - int64_t ret; + int64_t head; + int ret; - assert(cluster_sectors); - head =3D sector_num % cluster_sectors; - ret =3D iscsi_co_get_block_status(bs, sector_num - head, - BDRV_REQUEST_MAX_SECTORS, &pnum, - &file); + assert(iscsilun->cluster_size); + head =3D (sector_num * BDRV_SECTOR_SIZE) % iscsilun->cluster_size; + ret =3D iscsi_co_block_status(bs, false, + sector_num * BDRV_SECTOR_SIZE - head, + BDRV_REQUEST_MAX_BYTES, &pnum, NULL, N= ULL); if (ret < 0) { return ret; } /* if the whole request falls into an unallocated area we can avoid * reading and directly return zeroes instead */ - if (ret & BDRV_BLOCK_ZERO && pnum >=3D nb_sectors + head) { + if (ret & BDRV_BLOCK_ZERO && + pnum >=3D nb_sectors * BDRV_SECTOR_SIZE + head) { qemu_iovec_memset(iov, 0, 0x00, iov->size); return 0; } @@ -2213,7 +2210,7 @@ static BlockDriver bdrv_iscsi =3D { .bdrv_truncate =3D iscsi_truncate, .bdrv_refresh_limits =3D iscsi_refresh_limits, - .bdrv_co_get_block_status =3D iscsi_co_get_block_status, + .bdrv_co_block_status =3D iscsi_co_block_status, .bdrv_co_pdiscard =3D iscsi_co_pdiscard, .bdrv_co_pwrite_zeroes =3D iscsi_co_pwrite_zeroes, .bdrv_co_readv =3D iscsi_co_readv, @@ -2248,7 +2245,7 @@ static BlockDriver bdrv_iser =3D { .bdrv_truncate =3D iscsi_truncate, .bdrv_refresh_limits =3D iscsi_refresh_limits, - .bdrv_co_get_block_status =3D iscsi_co_get_block_status, + .bdrv_co_block_status =3D iscsi_co_block_status, .bdrv_co_pdiscard =3D iscsi_co_pdiscard, .bdrv_co_pwrite_zeroes =3D iscsi_co_pwrite_zeroes, .bdrv_co_readv =3D iscsi_co_readv, --=20 2.14.3 From nobody Sun Oct 5 17:36:07 2025 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.zohomail.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 1515193804385460.63962691993936; Fri, 5 Jan 2018 15:10:04 -0800 (PST) Received: from localhost ([::1]:34667 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXb7j-0005K8-HO for importer@patchew.org; Fri, 05 Jan 2018 18:10:03 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47600) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXawZ-00037u-NU for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:32 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eXawV-0000ET-Ql for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:31 -0500 Received: from mx1.redhat.com ([209.132.183.28]:39632) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eXawQ-0000AK-IN; Fri, 05 Jan 2018 17:58:22 -0500 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 97298356C3; Fri, 5 Jan 2018 22:58:21 +0000 (UTC) Received: from red.redhat.com (ovpn-124-124.rdu2.redhat.com [10.10.124.124]) by smtp.corp.redhat.com (Postfix) with ESMTP id B85B160BE7; Fri, 5 Jan 2018 22:58:17 +0000 (UTC) From: Eric Blake To: qemu-devel@nongnu.org Date: Fri, 5 Jan 2018 16:57:41 -0600 Message-Id: <20180105225753.30509-9-eblake@redhat.com> In-Reply-To: <20180105225753.30509-1-eblake@redhat.com> References: <20180105225753.30509-1-eblake@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Fri, 05 Jan 2018 22:58:21 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v7 08/20] null: Switch to .bdrv_co_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: kwolf@redhat.com, vsementsov@virtuozzo.com, famz@redhat.com, qemu-block@nongnu.org, jcody@redhat.com, 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" We are gradually moving away from sector-based interfaces, towards byte-based. Update the null driver accordingly. Signed-off-by: Eric Blake Reviewed-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Fam Zheng --- v6-v7: no change v5: minor fix to type of 'ret' v4: rebase to interface tweak v3: no change v2: rebase to mapping parameter --- block/null.c | 23 ++++++++++++----------- 1 file changed, 12 insertions(+), 11 deletions(-) diff --git a/block/null.c b/block/null.c index 0cdabaa440..2c16935f3c 100644 --- a/block/null.c +++ b/block/null.c @@ -222,22 +222,23 @@ static int null_reopen_prepare(BDRVReopenState *reope= n_state, return 0; } -static int64_t coroutine_fn null_co_get_block_status(BlockDriverState *bs, - int64_t sector_num, - int nb_sectors, int *= pnum, - BlockDriverState **fi= le) +static int coroutine_fn null_co_block_status(BlockDriverState *bs, + bool want_zero, int64_t offse= t, + int64_t bytes, int64_t *pnum, + int64_t *map, + BlockDriverState **file) { BDRVNullState *s =3D bs->opaque; - off_t start =3D sector_num * BDRV_SECTOR_SIZE; + int ret =3D BDRV_BLOCK_OFFSET_VALID; - *pnum =3D nb_sectors; + *pnum =3D bytes; + *map =3D offset; *file =3D bs; if (s->read_zeroes) { - return BDRV_BLOCK_OFFSET_VALID | start | BDRV_BLOCK_ZERO; - } else { - return BDRV_BLOCK_OFFSET_VALID | start; + ret |=3D BDRV_BLOCK_ZERO; } + return ret; } static void null_refresh_filename(BlockDriverState *bs, QDict *opts) @@ -269,7 +270,7 @@ static BlockDriver bdrv_null_co =3D { .bdrv_co_flush_to_disk =3D null_co_flush, .bdrv_reopen_prepare =3D null_reopen_prepare, - .bdrv_co_get_block_status =3D null_co_get_block_status, + .bdrv_co_block_status =3D null_co_block_status, .bdrv_refresh_filename =3D null_refresh_filename, }; @@ -289,7 +290,7 @@ static BlockDriver bdrv_null_aio =3D { .bdrv_aio_flush =3D null_aio_flush, .bdrv_reopen_prepare =3D null_reopen_prepare, - .bdrv_co_get_block_status =3D null_co_get_block_status, + .bdrv_co_block_status =3D null_co_block_status, .bdrv_refresh_filename =3D null_refresh_filename, }; --=20 2.14.3 From nobody Sun Oct 5 17:36:07 2025 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.zohomail.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 1515193712155485.0558933097466; Fri, 5 Jan 2018 15:08:32 -0800 (PST) Received: from localhost ([::1]:34649 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXb6A-0003lA-75 for importer@patchew.org; Fri, 05 Jan 2018 18:08:26 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47583) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXawZ-00037G-4x for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:32 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eXawY-0000GV-Bb for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:31 -0500 Received: from mx1.redhat.com ([209.132.183.28]:39666) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eXawU-0000DT-Rr; Fri, 05 Jan 2018 17:58:27 -0500 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id EAC2FDF24; Fri, 5 Jan 2018 22:58:25 +0000 (UTC) Received: from red.redhat.com (ovpn-124-124.rdu2.redhat.com [10.10.124.124]) by smtp.corp.redhat.com (Postfix) with ESMTP id D850C60BE7; Fri, 5 Jan 2018 22:58:21 +0000 (UTC) From: Eric Blake To: qemu-devel@nongnu.org Date: Fri, 5 Jan 2018 16:57:42 -0600 Message-Id: <20180105225753.30509-10-eblake@redhat.com> In-Reply-To: <20180105225753.30509-1-eblake@redhat.com> References: <20180105225753.30509-1-eblake@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Fri, 05 Jan 2018 22:58:25 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v7 09/20] parallels: Switch to .bdrv_co_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: kwolf@redhat.com, vsementsov@virtuozzo.com, famz@redhat.com, qemu-block@nongnu.org, jcody@redhat.com, Max Reitz , Stefan Hajnoczi , "Denis V. Lunev" 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" We are gradually moving away from sector-based interfaces, towards byte-based. Update the parallels driver accordingly. Note that the internal function block_status() is still sector-based, because it is still in use by other sector-based functions; but that's okay because request_alignment is 512 as a result of those functions. For now, no optimizations are added based on the mapping hint. Signed-off-by: Eric Blake Reviewed-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Fam Zheng --- v7: fix bug in *map [Vladimir] v6: no change v5: fix pnum when return is 0 v4: rebase to interface tweak, R-b dropped v3: no change v2: rebase to mapping parameter; it is ignored, so R-b kept --- block/parallels.c | 22 +++++++++++++++------- 1 file changed, 15 insertions(+), 7 deletions(-) diff --git a/block/parallels.c b/block/parallels.c index 9545761f49..64e80874a4 100644 --- a/block/parallels.c +++ b/block/parallels.c @@ -280,23 +280,31 @@ static coroutine_fn int parallels_co_flush_to_os(Bloc= kDriverState *bs) } -static int64_t coroutine_fn parallels_co_get_block_status(BlockDriverState= *bs, - int64_t sector_num, int nb_sectors, int *pnum, BlockDriverState **= file) +static int coroutine_fn parallels_co_block_status(BlockDriverState *bs, + bool want_zero, + int64_t offset, + int64_t bytes, + int64_t *pnum, + int64_t *map, + BlockDriverState **file) { BDRVParallelsState *s =3D bs->opaque; - int64_t offset; + int count; + assert(QEMU_IS_ALIGNED(offset | bytes, BDRV_SECTOR_SIZE)); qemu_co_mutex_lock(&s->lock); - offset =3D block_status(s, sector_num, nb_sectors, pnum); + offset =3D block_status(s, offset >> BDRV_SECTOR_BITS, + bytes >> BDRV_SECTOR_BITS, &count); qemu_co_mutex_unlock(&s->lock); + *pnum =3D count * BDRV_SECTOR_SIZE; if (offset < 0) { return 0; } + *map =3D offset * BDRV_SECTOR_SIZE; *file =3D bs->file->bs; - return (offset << BDRV_SECTOR_BITS) | - BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID; + return BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID; } static coroutine_fn int parallels_co_writev(BlockDriverState *bs, @@ -793,7 +801,7 @@ static BlockDriver bdrv_parallels =3D { .bdrv_open =3D parallels_open, .bdrv_close =3D parallels_close, .bdrv_child_perm =3D bdrv_format_default_perms, - .bdrv_co_get_block_status =3D parallels_co_get_block_status, + .bdrv_co_block_status =3D parallels_co_block_status, .bdrv_has_zero_init =3D bdrv_has_zero_init_1, .bdrv_co_flush_to_os =3D parallels_co_flush_to_os, .bdrv_co_readv =3D parallels_co_readv, --=20 2.14.3 From nobody Sun Oct 5 17:36:07 2025 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.zohomail.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 1515193981268879.7194341116294; Fri, 5 Jan 2018 15:13:01 -0800 (PST) Received: from localhost ([::1]:34688 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXbAT-00081h-Ah for importer@patchew.org; Fri, 05 Jan 2018 18:12:53 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47624) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXawa-00038Y-Jr for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:36 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eXawZ-0000HU-HU for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:32 -0500 Received: from mx1.redhat.com ([209.132.183.28]:40998) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eXawW-0000EX-E7; Fri, 05 Jan 2018 17:58:28 -0500 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 812487EA90; Fri, 5 Jan 2018 22:58:27 +0000 (UTC) Received: from red.redhat.com (ovpn-124-124.rdu2.redhat.com [10.10.124.124]) by smtp.corp.redhat.com (Postfix) with ESMTP id 3549B60BE7; Fri, 5 Jan 2018 22:58:26 +0000 (UTC) From: Eric Blake To: qemu-devel@nongnu.org Date: Fri, 5 Jan 2018 16:57:43 -0600 Message-Id: <20180105225753.30509-11-eblake@redhat.com> In-Reply-To: <20180105225753.30509-1-eblake@redhat.com> References: <20180105225753.30509-1-eblake@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Fri, 05 Jan 2018 22:58:27 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v7 10/20] qcow: Switch to .bdrv_co_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: kwolf@redhat.com, vsementsov@virtuozzo.com, famz@redhat.com, qemu-block@nongnu.org, jcody@redhat.com, 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" We are gradually moving away from sector-based interfaces, towards byte-based. Update the qcow driver accordingly. There is no intent to optimize based on the want_zero flag for this format. Signed-off-by: Eric Blake Reviewed-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Fam Zheng --- v5-v7: no change v4: rebase to interface tweak v3: rebase to master v2: rebase to mapping flag --- block/qcow.c | 27 ++++++++++++++++----------- 1 file changed, 16 insertions(+), 11 deletions(-) diff --git a/block/qcow.c b/block/qcow.c index 9569deeaf0..f09661dc0c 100644 --- a/block/qcow.c +++ b/block/qcow.c @@ -513,23 +513,28 @@ static int get_cluster_offset(BlockDriverState *bs, return 1; } -static int64_t coroutine_fn qcow_co_get_block_status(BlockDriverState *bs, - int64_t sector_num, int nb_sectors, int *pnum, BlockDriverState **= file) +static int coroutine_fn qcow_co_block_status(BlockDriverState *bs, + bool want_zero, + int64_t offset, int64_t bytes, + int64_t *pnum, int64_t *map, + BlockDriverState **file) { BDRVQcowState *s =3D bs->opaque; - int index_in_cluster, n, ret; + int index_in_cluster, ret; + int64_t n; uint64_t cluster_offset; qemu_co_mutex_lock(&s->lock); - ret =3D get_cluster_offset(bs, sector_num << 9, 0, 0, 0, 0, &cluster_o= ffset); + ret =3D get_cluster_offset(bs, offset, 0, 0, 0, 0, &cluster_offset); qemu_co_mutex_unlock(&s->lock); if (ret < 0) { return ret; } - index_in_cluster =3D sector_num & (s->cluster_sectors - 1); - n =3D s->cluster_sectors - index_in_cluster; - if (n > nb_sectors) - n =3D nb_sectors; + index_in_cluster =3D offset & (s->cluster_size - 1); + n =3D s->cluster_size - index_in_cluster; + if (n > bytes) { + n =3D bytes; + } *pnum =3D n; if (!cluster_offset) { return 0; @@ -537,9 +542,9 @@ static int64_t coroutine_fn qcow_co_get_block_status(Bl= ockDriverState *bs, if ((cluster_offset & QCOW_OFLAG_COMPRESSED) || s->crypto) { return BDRV_BLOCK_DATA; } - cluster_offset |=3D (index_in_cluster << BDRV_SECTOR_BITS); + *map =3D cluster_offset | index_in_cluster; *file =3D bs->file->bs; - return BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID | cluster_offset; + return BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID; } static int decompress_buffer(uint8_t *out_buf, int out_buf_size, @@ -1111,7 +1116,7 @@ static BlockDriver bdrv_qcow =3D { .bdrv_co_readv =3D qcow_co_readv, .bdrv_co_writev =3D qcow_co_writev, - .bdrv_co_get_block_status =3D qcow_co_get_block_status, + .bdrv_co_block_status =3D qcow_co_block_status, .bdrv_make_empty =3D qcow_make_empty, .bdrv_co_pwritev_compressed =3D qcow_co_pwritev_compressed, --=20 2.14.3 From nobody Sun Oct 5 17:36:07 2025 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.zohomail.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 1515193484720684.1227545915947; Fri, 5 Jan 2018 15:04:44 -0800 (PST) Received: from localhost ([::1]:34619 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXb2Z-0000UT-Nc for importer@patchew.org; Fri, 05 Jan 2018 18:04:43 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47690) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXawf-0003Do-My for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:38 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eXawe-0000L0-J3 for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:37 -0500 Received: from mx1.redhat.com ([209.132.183.28]:38572) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eXawY-0000Fq-Bi; Fri, 05 Jan 2018 17:58:30 -0500 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 5B6C678EC1; Fri, 5 Jan 2018 22:58:29 +0000 (UTC) Received: from red.redhat.com (ovpn-124-124.rdu2.redhat.com [10.10.124.124]) by smtp.corp.redhat.com (Postfix) with ESMTP id C0BF360BE7; Fri, 5 Jan 2018 22:58:27 +0000 (UTC) From: Eric Blake To: qemu-devel@nongnu.org Date: Fri, 5 Jan 2018 16:57:44 -0600 Message-Id: <20180105225753.30509-12-eblake@redhat.com> In-Reply-To: <20180105225753.30509-1-eblake@redhat.com> References: <20180105225753.30509-1-eblake@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Fri, 05 Jan 2018 22:58:29 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v7 11/20] qcow2: Switch to .bdrv_co_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: kwolf@redhat.com, vsementsov@virtuozzo.com, famz@redhat.com, qemu-block@nongnu.org, jcody@redhat.com, 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" We are gradually moving away from sector-based interfaces, towards byte-based. Update the qcow2 driver accordingly. For now, we are ignoring the 'want_zero' hint. However, it should be relatively straightforward to honor the hint as a way to return larger *pnum values when we have consecutive clusters with the same data/zero status but which differ only in having non-consecutive mappings. Signed-off-by: Eric Blake Reviewed-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Fam Zheng --- v5-v7: no change v4: update to interface tweak v3: no change v2: rebase to mapping flag --- block/qcow2.c | 24 +++++++++++++----------- 1 file changed, 13 insertions(+), 11 deletions(-) diff --git a/block/qcow2.c b/block/qcow2.c index 4348b2c0c5..d0b4c38110 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -1637,32 +1637,34 @@ static void qcow2_join_options(QDict *options, QDic= t *old_options) } } -static int64_t coroutine_fn qcow2_co_get_block_status(BlockDriverState *bs, - int64_t sector_num, int nb_sectors, int *pnum, BlockDriverState **= file) +static int coroutine_fn qcow2_co_block_status(BlockDriverState *bs, + bool want_zero, + int64_t offset, int64_t coun= t, + int64_t *pnum, int64_t *map, + BlockDriverState **file) { BDRVQcow2State *s =3D bs->opaque; uint64_t cluster_offset; int index_in_cluster, ret; unsigned int bytes; - int64_t status =3D 0; + int status =3D 0; - bytes =3D MIN(INT_MAX, nb_sectors * BDRV_SECTOR_SIZE); + bytes =3D MIN(INT_MAX, count); qemu_co_mutex_lock(&s->lock); - ret =3D qcow2_get_cluster_offset(bs, sector_num << BDRV_SECTOR_BITS, &= bytes, - &cluster_offset); + ret =3D qcow2_get_cluster_offset(bs, offset, &bytes, &cluster_offset); qemu_co_mutex_unlock(&s->lock); if (ret < 0) { return ret; } - *pnum =3D bytes >> BDRV_SECTOR_BITS; + *pnum =3D bytes; if (cluster_offset !=3D 0 && ret !=3D QCOW2_CLUSTER_COMPRESSED && !s->crypto) { - index_in_cluster =3D sector_num & (s->cluster_sectors - 1); - cluster_offset |=3D (index_in_cluster << BDRV_SECTOR_BITS); + index_in_cluster =3D offset & (s->cluster_size - 1); + *map =3D cluster_offset | index_in_cluster; *file =3D bs->file->bs; - status |=3D BDRV_BLOCK_OFFSET_VALID | cluster_offset; + status |=3D BDRV_BLOCK_OFFSET_VALID; } if (ret =3D=3D QCOW2_CLUSTER_ZERO_PLAIN || ret =3D=3D QCOW2_CLUSTER_ZE= RO_ALLOC) { status |=3D BDRV_BLOCK_ZERO; @@ -4320,7 +4322,7 @@ BlockDriver bdrv_qcow2 =3D { .bdrv_child_perm =3D bdrv_format_default_perms, .bdrv_create =3D qcow2_create, .bdrv_has_zero_init =3D bdrv_has_zero_init_1, - .bdrv_co_get_block_status =3D qcow2_co_get_block_status, + .bdrv_co_block_status =3D qcow2_co_block_status, .bdrv_co_preadv =3D qcow2_co_preadv, .bdrv_co_pwritev =3D qcow2_co_pwritev, --=20 2.14.3 From nobody Sun Oct 5 17:36:07 2025 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.zohomail.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 1515193897245800.3310047247895; Fri, 5 Jan 2018 15:11:37 -0800 (PST) Received: from localhost ([::1]:34685 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXb9A-0006jf-Gf for importer@patchew.org; Fri, 05 Jan 2018 18:11:32 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47736) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXawh-0003Fg-GE for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:40 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eXawg-0000MB-5y for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:39 -0500 Received: from mx1.redhat.com ([209.132.183.28]:48088) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eXawa-0000HM-0Q; Fri, 05 Jan 2018 17:58:32 -0500 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 1184697DCC; Fri, 5 Jan 2018 22:58:31 +0000 (UTC) Received: from red.redhat.com (ovpn-124-124.rdu2.redhat.com [10.10.124.124]) by smtp.corp.redhat.com (Postfix) with ESMTP id 96ADC60BE7; Fri, 5 Jan 2018 22:58:29 +0000 (UTC) From: Eric Blake To: qemu-devel@nongnu.org Date: Fri, 5 Jan 2018 16:57:45 -0600 Message-Id: <20180105225753.30509-13-eblake@redhat.com> In-Reply-To: <20180105225753.30509-1-eblake@redhat.com> References: <20180105225753.30509-1-eblake@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Fri, 05 Jan 2018 22:58:31 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v7 12/20] qed: Switch to .bdrv_co_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: kwolf@redhat.com, vsementsov@virtuozzo.com, famz@redhat.com, qemu-block@nongnu.org, jcody@redhat.com, Max Reitz , Stefan Hajnoczi 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" We are gradually moving away from sector-based interfaces, towards byte-based. Update the qed driver accordingly, taking the opportunity to inline qed_is_allocated_cb() into its lone caller (the callback used to be important, until we switched qed to coroutines). There is no intent to optimize based on the want_zero flag for this format. Signed-off-by: Eric Blake Reviewed-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Fam Zheng --- v6-v7: no change v5: initialize len before qed_find_cluster() [Vladimir] v4: rebase to interface change, inline pointless callback v3: no change v2: rebase to mapping flag, fix mask in qed_is_allocated_cb --- block/qed.c | 84 +++++++++++++++++++++------------------------------------= ---- 1 file changed, 28 insertions(+), 56 deletions(-) diff --git a/block/qed.c b/block/qed.c index 821dcaa055..13fbc3e2f1 100644 --- a/block/qed.c +++ b/block/qed.c @@ -688,74 +688,46 @@ finish: return ret; } -typedef struct { - BlockDriverState *bs; - Coroutine *co; - uint64_t pos; - int64_t status; - int *pnum; - BlockDriverState **file; -} QEDIsAllocatedCB; - -/* Called with table_lock held. */ -static void qed_is_allocated_cb(void *opaque, int ret, uint64_t offset, si= ze_t len) -{ - QEDIsAllocatedCB *cb =3D opaque; - BDRVQEDState *s =3D cb->bs->opaque; - *cb->pnum =3D len / BDRV_SECTOR_SIZE; - switch (ret) { - case QED_CLUSTER_FOUND: - offset |=3D qed_offset_into_cluster(s, cb->pos); - cb->status =3D BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID | offset; - *cb->file =3D cb->bs->file->bs; - break; - case QED_CLUSTER_ZERO: - cb->status =3D BDRV_BLOCK_ZERO; - break; - case QED_CLUSTER_L2: - case QED_CLUSTER_L1: - cb->status =3D 0; - break; - default: - assert(ret < 0); - cb->status =3D ret; - break; - } - - if (cb->co) { - aio_co_wake(cb->co); - } -} - -static int64_t coroutine_fn bdrv_qed_co_get_block_status(BlockDriverState = *bs, - int64_t sector_num, - int nb_sectors, int *pnum, +static int coroutine_fn bdrv_qed_co_block_status(BlockDriverState *bs, + bool want_zero, + int64_t pos, int64_t byte= s, + int64_t *pnum, int64_t *m= ap, BlockDriverState **file) { BDRVQEDState *s =3D bs->opaque; - size_t len =3D (size_t)nb_sectors * BDRV_SECTOR_SIZE; - QEDIsAllocatedCB cb =3D { - .bs =3D bs, - .pos =3D (uint64_t)sector_num * BDRV_SECTOR_SIZE, - .status =3D BDRV_BLOCK_OFFSET_MASK, - .pnum =3D pnum, - .file =3D file, - }; + size_t len =3D MIN(bytes, SIZE_MAX); + int status; QEDRequest request =3D { .l2_table =3D NULL }; uint64_t offset; int ret; qemu_co_mutex_lock(&s->table_lock); - ret =3D qed_find_cluster(s, &request, cb.pos, &len, &offset); - qed_is_allocated_cb(&cb, ret, offset, len); + ret =3D qed_find_cluster(s, &request, pos, &len, &offset); - /* The callback was invoked immediately */ - assert(cb.status !=3D BDRV_BLOCK_OFFSET_MASK); + *pnum =3D len; + switch (ret) { + case QED_CLUSTER_FOUND: + *map =3D offset | qed_offset_into_cluster(s, pos); + status =3D BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID; + *file =3D bs->file->bs; + break; + case QED_CLUSTER_ZERO: + status =3D BDRV_BLOCK_ZERO; + break; + case QED_CLUSTER_L2: + case QED_CLUSTER_L1: + status =3D 0; + break; + default: + assert(ret < 0); + status =3D ret; + break; + } qed_unref_l2_cache_entry(request.l2_table); qemu_co_mutex_unlock(&s->table_lock); - return cb.status; + return status; } static BDRVQEDState *acb_to_s(QEDAIOCB *acb) @@ -1595,7 +1567,7 @@ static BlockDriver bdrv_qed =3D { .bdrv_child_perm =3D bdrv_format_default_perms, .bdrv_create =3D bdrv_qed_create, .bdrv_has_zero_init =3D bdrv_has_zero_init_1, - .bdrv_co_get_block_status =3D bdrv_qed_co_get_block_status, + .bdrv_co_block_status =3D bdrv_qed_co_block_status, .bdrv_co_readv =3D bdrv_qed_co_readv, .bdrv_co_writev =3D bdrv_qed_co_writev, .bdrv_co_pwrite_zeroes =3D bdrv_qed_co_pwrite_zeroes, --=20 2.14.3 From nobody Sun Oct 5 17:36:07 2025 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.zohomail.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 1515193667004621.9069038176438; Fri, 5 Jan 2018 15:07:47 -0800 (PST) Received: from localhost ([::1]:34648 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXb5V-0003A4-UA for importer@patchew.org; Fri, 05 Jan 2018 18:07:46 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47714) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXawg-0003Er-Kj for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:39 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eXawf-0000Lj-Op for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:38 -0500 Received: from mx1.redhat.com ([209.132.183.28]:37350) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eXawb-0000Ip-RV; Fri, 05 Jan 2018 17:58:33 -0500 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id E374BC049E39; Fri, 5 Jan 2018 22:58:32 +0000 (UTC) Received: from red.redhat.com (ovpn-124-124.rdu2.redhat.com [10.10.124.124]) by smtp.corp.redhat.com (Postfix) with ESMTP id 500CD60BE7; Fri, 5 Jan 2018 22:58:31 +0000 (UTC) From: Eric Blake To: qemu-devel@nongnu.org Date: Fri, 5 Jan 2018 16:57:46 -0600 Message-Id: <20180105225753.30509-14-eblake@redhat.com> In-Reply-To: <20180105225753.30509-1-eblake@redhat.com> References: <20180105225753.30509-1-eblake@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Fri, 05 Jan 2018 22:58:32 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v7 13/20] raw: Switch to .bdrv_co_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: kwolf@redhat.com, vsementsov@virtuozzo.com, famz@redhat.com, qemu-block@nongnu.org, jcody@redhat.com, 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" We are gradually moving away from sector-based interfaces, towards byte-based. Update the raw driver accordingly. Signed-off-by: Eric Blake Reviewed-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Fam Zheng --- v5-v7: no change v4: rebase to interface tweak v3: no change v2: rebase to mapping --- block/raw-format.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/block/raw-format.c b/block/raw-format.c index ab552c0954..830243a8e4 100644 --- a/block/raw-format.c +++ b/block/raw-format.c @@ -250,17 +250,17 @@ fail: return ret; } -static int64_t coroutine_fn raw_co_get_block_status(BlockDriverState *bs, - int64_t sector_num, - int nb_sectors, int *pnum, +static int coroutine_fn raw_co_block_status(BlockDriverState *bs, + bool want_zero, int64_t offset, + int64_t bytes, int64_t *pnum, + int64_t *map, BlockDriverState **file) { BDRVRawState *s =3D bs->opaque; - *pnum =3D nb_sectors; + *pnum =3D bytes; *file =3D bs->file->bs; - sector_num +=3D s->offset / BDRV_SECTOR_SIZE; - return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID | - (sector_num << BDRV_SECTOR_BITS); + *map =3D offset + s->offset; + return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID; } static int coroutine_fn raw_co_pwrite_zeroes(BlockDriverState *bs, @@ -496,7 +496,7 @@ BlockDriver bdrv_raw =3D { .bdrv_co_pwritev =3D &raw_co_pwritev, .bdrv_co_pwrite_zeroes =3D &raw_co_pwrite_zeroes, .bdrv_co_pdiscard =3D &raw_co_pdiscard, - .bdrv_co_get_block_status =3D &raw_co_get_block_status, + .bdrv_co_block_status =3D &raw_co_block_status, .bdrv_truncate =3D &raw_truncate, .bdrv_getlength =3D &raw_getlength, .has_variable_length =3D true, --=20 2.14.3 From nobody Sun Oct 5 17:36:07 2025 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.zohomail.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 1515193727355752.1238247169208; Fri, 5 Jan 2018 15:08:47 -0800 (PST) Received: from localhost ([::1]:34656 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXb6U-00043U-Gu for importer@patchew.org; Fri, 05 Jan 2018 18:08:46 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47786) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXawj-0003Hd-TJ for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:45 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eXawi-0000OI-In for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:41 -0500 Received: from mx1.redhat.com ([209.132.183.28]:47264) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eXawe-0000KO-Dd; Fri, 05 Jan 2018 17:58:36 -0500 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 5750681DE1; Fri, 5 Jan 2018 22:58:35 +0000 (UTC) Received: from red.redhat.com (ovpn-124-124.rdu2.redhat.com [10.10.124.124]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2FCBC60BE7; Fri, 5 Jan 2018 22:58:33 +0000 (UTC) From: Eric Blake To: qemu-devel@nongnu.org Date: Fri, 5 Jan 2018 16:57:47 -0600 Message-Id: <20180105225753.30509-15-eblake@redhat.com> In-Reply-To: <20180105225753.30509-1-eblake@redhat.com> References: <20180105225753.30509-1-eblake@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Fri, 05 Jan 2018 22:58:35 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v7 14/20] sheepdog: Switch to .bdrv_co_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: kwolf@redhat.com, vsementsov@virtuozzo.com, famz@redhat.com, qemu-block@nongnu.org, Hitoshi Mitake , jcody@redhat.com, Max Reitz , "open list:Sheepdog" , Liu Yuan 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" We are gradually moving away from sector-based interfaces, towards byte-based. Update the sheepdog driver accordingly. Signed-off-by: Eric Blake Reviewed-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Fam Zheng Reviewed-by: Jeff Cody --- v7: rebase to minor spacing changes in master v5-v6: no change v4: update to interface tweak v3: no change v2: rebase to mapping flag --- block/sheepdog.c | 26 +++++++++++++------------- 1 file changed, 13 insertions(+), 13 deletions(-) diff --git a/block/sheepdog.c b/block/sheepdog.c index f684477328..8a7b688ece 100644 --- a/block/sheepdog.c +++ b/block/sheepdog.c @@ -2987,19 +2987,19 @@ static coroutine_fn int sd_co_pdiscard(BlockDriverS= tate *bs, int64_t offset, return acb.ret; } -static coroutine_fn int64_t -sd_co_get_block_status(BlockDriverState *bs, int64_t sector_num, int nb_se= ctors, - int *pnum, BlockDriverState **file) +static coroutine_fn int +sd_co_block_status(BlockDriverState *bs, bool want_zero, int64_t offset, + int64_t bytes, int64_t *pnum, int64_t *map, + BlockDriverState **file) { BDRVSheepdogState *s =3D bs->opaque; SheepdogInode *inode =3D &s->inode; uint32_t object_size =3D (UINT32_C(1) << inode->block_size_shift); - uint64_t offset =3D sector_num * BDRV_SECTOR_SIZE; unsigned long start =3D offset / object_size, - end =3D DIV_ROUND_UP((sector_num + nb_sectors) * - BDRV_SECTOR_SIZE, object_size); + end =3D DIV_ROUND_UP(offset + bytes, object_size); unsigned long idx; - int64_t ret =3D BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID | offset; + *map =3D offset; + int ret =3D BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID; for (idx =3D start; idx < end; idx++) { if (inode->data_vdi_id[idx] =3D=3D 0) { @@ -3016,9 +3016,9 @@ sd_co_get_block_status(BlockDriverState *bs, int64_t = sector_num, int nb_sectors, } } - *pnum =3D (idx - start) * object_size / BDRV_SECTOR_SIZE; - if (*pnum > nb_sectors) { - *pnum =3D nb_sectors; + *pnum =3D (idx - start) * object_size; + if (*pnum > bytes) { + *pnum =3D bytes; } if (ret > 0 && ret & BDRV_BLOCK_OFFSET_VALID) { *file =3D bs; @@ -3096,7 +3096,7 @@ static BlockDriver bdrv_sheepdog =3D { .bdrv_co_writev =3D sd_co_writev, .bdrv_co_flush_to_disk =3D sd_co_flush_to_disk, .bdrv_co_pdiscard =3D sd_co_pdiscard, - .bdrv_co_get_block_status =3D sd_co_get_block_status, + .bdrv_co_block_status =3D sd_co_block_status, .bdrv_snapshot_create =3D sd_snapshot_create, .bdrv_snapshot_goto =3D sd_snapshot_goto, @@ -3132,7 +3132,7 @@ static BlockDriver bdrv_sheepdog_tcp =3D { .bdrv_co_writev =3D sd_co_writev, .bdrv_co_flush_to_disk =3D sd_co_flush_to_disk, .bdrv_co_pdiscard =3D sd_co_pdiscard, - .bdrv_co_get_block_status =3D sd_co_get_block_status, + .bdrv_co_block_status =3D sd_co_block_status, .bdrv_snapshot_create =3D sd_snapshot_create, .bdrv_snapshot_goto =3D sd_snapshot_goto, @@ -3168,7 +3168,7 @@ static BlockDriver bdrv_sheepdog_unix =3D { .bdrv_co_writev =3D sd_co_writev, .bdrv_co_flush_to_disk =3D sd_co_flush_to_disk, .bdrv_co_pdiscard =3D sd_co_pdiscard, - .bdrv_co_get_block_status =3D sd_co_get_block_status, + .bdrv_co_block_status =3D sd_co_block_status, .bdrv_snapshot_create =3D sd_snapshot_create, .bdrv_snapshot_goto =3D sd_snapshot_goto, --=20 2.14.3 From nobody Sun Oct 5 17:36:07 2025 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.zohomail.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 1515194120990536.5305207552854; Fri, 5 Jan 2018 15:15:20 -0800 (PST) Received: from localhost ([::1]:34868 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXbCq-00023d-67 for importer@patchew.org; Fri, 05 Jan 2018 18:15:20 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47900) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXawp-0003NN-7H for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:48 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eXawo-0000UV-9j for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:47 -0500 Received: from mx1.redhat.com ([209.132.183.28]:41048) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eXawi-0000O5-Pw; Fri, 05 Jan 2018 17:58:41 -0500 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id E03248B111; Fri, 5 Jan 2018 22:58:39 +0000 (UTC) Received: from red.redhat.com (ovpn-124-124.rdu2.redhat.com [10.10.124.124]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9701360BE7; Fri, 5 Jan 2018 22:58:35 +0000 (UTC) From: Eric Blake To: qemu-devel@nongnu.org Date: Fri, 5 Jan 2018 16:57:48 -0600 Message-Id: <20180105225753.30509-16-eblake@redhat.com> In-Reply-To: <20180105225753.30509-1-eblake@redhat.com> References: <20180105225753.30509-1-eblake@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Fri, 05 Jan 2018 22:58:39 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v7 15/20] vdi: Avoid bitrot of debugging code 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: kwolf@redhat.com, vsementsov@virtuozzo.com, famz@redhat.com, qemu-block@nongnu.org, Stefan Weil , jcody@redhat.com, Max Reitz Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" Rework the debug define so that we always get -Wformat checking, even when debugging is disabled. Signed-off-by: Eric Blake Reviewed-by: Stefan Weil Reviewed-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Fam Zheng --- v2-v7: no change --- block/vdi.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/block/vdi.c b/block/vdi.c index 8da5dfc897..6f83221ddc 100644 --- a/block/vdi.c +++ b/block/vdi.c @@ -86,12 +86,18 @@ #define DEFAULT_CLUSTER_SIZE (1 * MiB) #if defined(CONFIG_VDI_DEBUG) -#define logout(fmt, ...) \ - fprintf(stderr, "vdi\t%-24s" fmt, __func__, ##__VA_ARGS__) +#define VDI_DEBUG 1 #else -#define logout(fmt, ...) ((void)0) +#define VDI_DEBUG 0 #endif +#define logout(fmt, ...) \ + do { \ + if (VDI_DEBUG) { \ + fprintf(stderr, "vdi\t%-24s" fmt, __func__, ##__VA_ARGS__); \ + } \ + } while (0) + /* Image signature. */ #define VDI_SIGNATURE 0xbeda107f --=20 2.14.3 From nobody Sun Oct 5 17:36:07 2025 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.zohomail.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 1515194233708832.7466795783806; Fri, 5 Jan 2018 15:17:13 -0800 (PST) Received: from localhost ([::1]:35251 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXbEV-0003re-2J for importer@patchew.org; Fri, 05 Jan 2018 18:17:03 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47937) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXawq-0003P9-RN for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:49 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eXawp-0000Vl-JQ for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:48 -0500 Received: from mx1.redhat.com ([209.132.183.28]:48130) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eXawk-0000Q6-DC; Fri, 05 Jan 2018 17:58:42 -0500 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 7692C4ACBB; Fri, 5 Jan 2018 22:58:41 +0000 (UTC) Received: from red.redhat.com (ovpn-124-124.rdu2.redhat.com [10.10.124.124]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2C32E60BE7; Fri, 5 Jan 2018 22:58:40 +0000 (UTC) From: Eric Blake To: qemu-devel@nongnu.org Date: Fri, 5 Jan 2018 16:57:49 -0600 Message-Id: <20180105225753.30509-17-eblake@redhat.com> In-Reply-To: <20180105225753.30509-1-eblake@redhat.com> References: <20180105225753.30509-1-eblake@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Fri, 05 Jan 2018 22:58:41 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v7 16/20] vdi: Switch to .bdrv_co_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: kwolf@redhat.com, vsementsov@virtuozzo.com, famz@redhat.com, qemu-block@nongnu.org, Stefan Weil , jcody@redhat.com, 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" We are gradually moving away from sector-based interfaces, towards byte-based. Update the vdi driver accordingly. Note that the TODO is already covered (the block layer guarantees bounds of its requests), and that we can remove the now-unused s->block_sectors. Signed-off-by: Eric Blake Reviewed-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Fam Zheng --- v6-v7: no change v5: fix pnum when offset rounded down to block_size [Vladimir] v4: rebase to interface tweak v3: no change v2: rebase to mapping flag --- block/vdi.c | 33 +++++++++++++-------------------- 1 file changed, 13 insertions(+), 20 deletions(-) diff --git a/block/vdi.c b/block/vdi.c index 6f83221ddc..f309562d36 100644 --- a/block/vdi.c +++ b/block/vdi.c @@ -171,8 +171,6 @@ typedef struct { uint32_t *bmap; /* Size of block (bytes). */ uint32_t block_size; - /* Size of block (sectors). */ - uint32_t block_sectors; /* First sector of block map. */ uint32_t bmap_sector; /* VDI header (converted to host endianness). */ @@ -462,7 +460,6 @@ static int vdi_open(BlockDriverState *bs, QDict *option= s, int flags, bs->total_sectors =3D header.disk_size / SECTOR_SIZE; s->block_size =3D header.block_size; - s->block_sectors =3D header.block_size / SECTOR_SIZE; s->bmap_sector =3D header.offset_bmap / SECTOR_SIZE; s->header =3D header; @@ -508,33 +505,29 @@ static int vdi_reopen_prepare(BDRVReopenState *state, return 0; } -static int64_t coroutine_fn vdi_co_get_block_status(BlockDriverState *bs, - int64_t sector_num, int nb_sectors, int *pnum, BlockDriverState **= file) +static int coroutine_fn vdi_co_block_status(BlockDriverState *bs, + bool want_zero, + int64_t offset, int64_t bytes, + int64_t *pnum, int64_t *map, + BlockDriverState **file) { - /* TODO: Check for too large sector_num (in bdrv_is_allocated or here)= . */ BDRVVdiState *s =3D (BDRVVdiState *)bs->opaque; - size_t bmap_index =3D sector_num / s->block_sectors; - size_t sector_in_block =3D sector_num % s->block_sectors; - int n_sectors =3D s->block_sectors - sector_in_block; + size_t bmap_index =3D offset / s->block_size; + size_t index_in_block =3D offset % s->block_size; uint32_t bmap_entry =3D le32_to_cpu(s->bmap[bmap_index]); - uint64_t offset; int result; - logout("%p, %" PRId64 ", %d, %p\n", bs, sector_num, nb_sectors, pnum); - if (n_sectors > nb_sectors) { - n_sectors =3D nb_sectors; - } - *pnum =3D n_sectors; + logout("%p, %" PRId64 ", %" PRId64 ", %p\n", bs, offset, bytes, pnum); + *pnum =3D MIN(s->block_size - index_in_block, bytes); result =3D VDI_IS_ALLOCATED(bmap_entry); if (!result) { return 0; } - offset =3D s->header.offset_data + - (uint64_t)bmap_entry * s->block_size + - sector_in_block * SECTOR_SIZE; + *map =3D s->header.offset_data + (uint64_t)bmap_entry * s->block_size + + index_in_block; *file =3D bs->file->bs; - return BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID | offset; + return BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID; } static int coroutine_fn @@ -902,7 +895,7 @@ static BlockDriver bdrv_vdi =3D { .bdrv_child_perm =3D bdrv_format_default_perms, .bdrv_create =3D vdi_create, .bdrv_has_zero_init =3D bdrv_has_zero_init_1, - .bdrv_co_get_block_status =3D vdi_co_get_block_status, + .bdrv_co_block_status =3D vdi_co_block_status, .bdrv_make_empty =3D vdi_make_empty, .bdrv_co_preadv =3D vdi_co_preadv, --=20 2.14.3 From nobody Sun Oct 5 17:36:07 2025 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.zohomail.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 (208.118.235.17 [208.118.235.17]) by mx.zohomail.com with SMTPS id 1515193919675547.733528298978; Fri, 5 Jan 2018 15:11:59 -0800 (PST) Received: from localhost ([::1]:34686 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXb9Q-00073N-CF for importer@patchew.org; Fri, 05 Jan 2018 18:11:48 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47935) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXawq-0003P7-QL for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:49 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eXawp-0000Vs-Kw for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:48 -0500 Received: from mx1.redhat.com ([209.132.183.28]:39754) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eXawm-0000SD-0T; Fri, 05 Jan 2018 17:58:44 -0500 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 16BF4356C1; Fri, 5 Jan 2018 22:58:43 +0000 (UTC) Received: from red.redhat.com (ovpn-124-124.rdu2.redhat.com [10.10.124.124]) by smtp.corp.redhat.com (Postfix) with ESMTP id B5D4960BE7; Fri, 5 Jan 2018 22:58:41 +0000 (UTC) From: Eric Blake To: qemu-devel@nongnu.org Date: Fri, 5 Jan 2018 16:57:50 -0600 Message-Id: <20180105225753.30509-18-eblake@redhat.com> In-Reply-To: <20180105225753.30509-1-eblake@redhat.com> References: <20180105225753.30509-1-eblake@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Fri, 05 Jan 2018 22:58:43 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v7 17/20] vmdk: Switch to .bdrv_co_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: kwolf@redhat.com, vsementsov@virtuozzo.com, famz@redhat.com, qemu-block@nongnu.org, jcody@redhat.com, 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" We are gradually moving away from sector-based interfaces, towards byte-based. Update the vmdk driver accordingly. Drop the now-unused vmdk_find_index_in_cluster(). Also, fix a pre-existing bug: if find_extent() fails (unlikely, since the block layer did a bounds check), then we must return a failure, rather than 0. Signed-off-by: Eric Blake Reviewed-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Fam Zheng --- v6-v7: no change v5: drop dead code [Vladimir], return error on find_extent() failure v4: rebase to interface tweak v3: no change v2: rebase to mapping flag --- block/vmdk.c | 38 ++++++++++++++------------------------ 1 file changed, 14 insertions(+), 24 deletions(-) diff --git a/block/vmdk.c b/block/vmdk.c index c665bcc977..8ae36e7a45 100644 --- a/block/vmdk.c +++ b/block/vmdk.c @@ -1295,33 +1295,27 @@ static inline uint64_t vmdk_find_offset_in_cluster(= VmdkExtent *extent, return extent_relative_offset % cluster_size; } -static inline uint64_t vmdk_find_index_in_cluster(VmdkExtent *extent, - int64_t sector_num) -{ - uint64_t offset; - offset =3D vmdk_find_offset_in_cluster(extent, sector_num * BDRV_SECTO= R_SIZE); - return offset / BDRV_SECTOR_SIZE; -} - -static int64_t coroutine_fn vmdk_co_get_block_status(BlockDriverState *bs, - int64_t sector_num, int nb_sectors, int *pnum, BlockDriverState **= file) +static int coroutine_fn vmdk_co_block_status(BlockDriverState *bs, + bool want_zero, + int64_t offset, int64_t bytes, + int64_t *pnum, int64_t *map, + BlockDriverState **file) { BDRVVmdkState *s =3D bs->opaque; int64_t index_in_cluster, n, ret; - uint64_t offset; + uint64_t cluster_offset; VmdkExtent *extent; - extent =3D find_extent(s, sector_num, NULL); + extent =3D find_extent(s, offset >> BDRV_SECTOR_BITS, NULL); if (!extent) { - return 0; + return -EIO; } qemu_co_mutex_lock(&s->lock); - ret =3D get_cluster_offset(bs, extent, NULL, - sector_num * 512, false, &offset, + ret =3D get_cluster_offset(bs, extent, NULL, offset, false, &cluster_o= ffset, 0, 0); qemu_co_mutex_unlock(&s->lock); - index_in_cluster =3D vmdk_find_index_in_cluster(extent, sector_num); + index_in_cluster =3D vmdk_find_offset_in_cluster(extent, offset); switch (ret) { case VMDK_ERROR: ret =3D -EIO; @@ -1336,18 +1330,14 @@ static int64_t coroutine_fn vmdk_co_get_block_statu= s(BlockDriverState *bs, ret =3D BDRV_BLOCK_DATA; if (!extent->compressed) { ret |=3D BDRV_BLOCK_OFFSET_VALID; - ret |=3D (offset + (index_in_cluster << BDRV_SECTOR_BITS)) - & BDRV_BLOCK_OFFSET_MASK; + *map =3D cluster_offset + index_in_cluster; } *file =3D extent->file->bs; break; } - n =3D extent->cluster_sectors - index_in_cluster; - if (n > nb_sectors) { - n =3D nb_sectors; - } - *pnum =3D n; + n =3D extent->cluster_sectors * BDRV_SECTOR_SIZE - index_in_cluster; + *pnum =3D MIN(n, bytes); return ret; } @@ -2393,7 +2383,7 @@ static BlockDriver bdrv_vmdk =3D { .bdrv_close =3D vmdk_close, .bdrv_create =3D vmdk_create, .bdrv_co_flush_to_disk =3D vmdk_co_flush, - .bdrv_co_get_block_status =3D vmdk_co_get_block_status, + .bdrv_co_block_status =3D vmdk_co_block_status, .bdrv_get_allocated_file_size =3D vmdk_get_allocated_file_size, .bdrv_has_zero_init =3D vmdk_has_zero_init, .bdrv_get_specific_info =3D vmdk_get_specific_info, --=20 2.14.3 From nobody Sun Oct 5 17:36:07 2025 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.zohomail.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 1515193921818256.37203206303604; 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Fri, 5 Jan 2018 22:58:46 +0000 (UTC) Received: from red.redhat.com (ovpn-124-124.rdu2.redhat.com [10.10.124.124]) by smtp.corp.redhat.com (Postfix) with ESMTP id 5525660BE7; Fri, 5 Jan 2018 22:58:43 +0000 (UTC) From: Eric Blake To: qemu-devel@nongnu.org Date: Fri, 5 Jan 2018 16:57:51 -0600 Message-Id: <20180105225753.30509-19-eblake@redhat.com> In-Reply-To: <20180105225753.30509-1-eblake@redhat.com> References: <20180105225753.30509-1-eblake@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Fri, 05 Jan 2018 22:58:46 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v7 18/20] vpc: Switch to .bdrv_co_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: kwolf@redhat.com, vsementsov@virtuozzo.com, famz@redhat.com, qemu-block@nongnu.org, jcody@redhat.com, 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" We are gradually moving away from sector-based interfaces, towards byte-based. Update the vpc driver accordingly. Signed-off-by: Eric Blake Reviewed-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Fam Zheng --- v7: tweak commit message and type of 'n' [Fam] v6: no change v5: fix incorrect rounding in 'map' and bad loop condition [Vladimir] v4: rebase to interface tweak v3: rebase to master v2: drop get_sector_offset() [Kevin], rebase to mapping flag --- block/vpc.c | 45 +++++++++++++++++++++++---------------------- 1 file changed, 23 insertions(+), 22 deletions(-) diff --git a/block/vpc.c b/block/vpc.c index 1576d7b595..97011febd3 100644 --- a/block/vpc.c +++ b/block/vpc.c @@ -705,53 +705,54 @@ fail: return ret; } -static int64_t coroutine_fn vpc_co_get_block_status(BlockDriverState *bs, - int64_t sector_num, int nb_sectors, int *pnum, BlockDriverState **= file) +static int coroutine_fn vpc_co_block_status(BlockDriverState *bs, + bool want_zero, + int64_t offset, int64_t bytes, + int64_t *pnum, int64_t *map, + BlockDriverState **file) { BDRVVPCState *s =3D bs->opaque; VHDFooter *footer =3D (VHDFooter*) s->footer_buf; - int64_t start, offset; + int64_t image_offset; bool allocated; - int64_t ret; - int n; + int ret; + int64_t n; if (be32_to_cpu(footer->type) =3D=3D VHD_FIXED) { - *pnum =3D nb_sectors; + *pnum =3D bytes; + *map =3D offset; *file =3D bs->file->bs; - return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID | - (sector_num << BDRV_SECTOR_BITS); + return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID; } qemu_co_mutex_lock(&s->lock); - offset =3D get_image_offset(bs, sector_num << BDRV_SECTOR_BITS, false,= NULL); - start =3D offset; - allocated =3D (offset !=3D -1); + image_offset =3D get_image_offset(bs, offset, false, NULL); + allocated =3D (image_offset !=3D -1); *pnum =3D 0; ret =3D 0; do { /* All sectors in a block are contiguous (without using the bitmap= ) */ - n =3D ROUND_UP(sector_num + 1, s->block_size / BDRV_SECTOR_SIZE) - - sector_num; - n =3D MIN(n, nb_sectors); + n =3D ROUND_UP(offset + 1, s->block_size) - offset; + n =3D MIN(n, bytes); *pnum +=3D n; - sector_num +=3D n; - nb_sectors -=3D n; + offset +=3D n; + bytes -=3D n; /* *pnum can't be greater than one block for allocated * sectors since there is always a bitmap in between. */ if (allocated) { *file =3D bs->file->bs; - ret =3D BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID | start; + *map =3D image_offset; + ret =3D BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID; break; } - if (nb_sectors =3D=3D 0) { + if (bytes =3D=3D 0) { break; } - offset =3D get_image_offset(bs, sector_num << BDRV_SECTOR_BITS, fa= lse, - NULL); - } while (offset =3D=3D -1); + image_offset =3D get_image_offset(bs, offset, false, NULL); + } while (image_offset =3D=3D -1); qemu_co_mutex_unlock(&s->lock); return ret; @@ -1097,7 +1098,7 @@ static BlockDriver bdrv_vpc =3D { .bdrv_co_preadv =3D vpc_co_preadv, .bdrv_co_pwritev =3D vpc_co_pwritev, - .bdrv_co_get_block_status =3D vpc_co_get_block_status, + .bdrv_co_block_status =3D vpc_co_block_status, .bdrv_get_info =3D vpc_get_info, --=20 2.14.3 From nobody Sun Oct 5 17:36:07 2025 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.zohomail.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 1515194077144843.4170308152741; Fri, 5 Jan 2018 15:14:37 -0800 (PST) Received: from localhost ([::1]:34862 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXbC8-0001Q5-Al for importer@patchew.org; Fri, 05 Jan 2018 18:14:36 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48043) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXawz-0003WU-3A for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:58 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eXawy-0000br-8M for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:58:57 -0500 Received: from mx1.redhat.com ([209.132.183.28]:36608) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eXaws-0000YB-T2; Fri, 05 Jan 2018 17:58:51 -0500 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id CD52561D0D; Fri, 5 Jan 2018 22:58:49 +0000 (UTC) Received: from red.redhat.com (ovpn-124-124.rdu2.redhat.com [10.10.124.124]) by smtp.corp.redhat.com (Postfix) with ESMTP id 04FB260BE7; Fri, 5 Jan 2018 22:58:46 +0000 (UTC) From: Eric Blake To: qemu-devel@nongnu.org Date: Fri, 5 Jan 2018 16:57:52 -0600 Message-Id: <20180105225753.30509-20-eblake@redhat.com> In-Reply-To: <20180105225753.30509-1-eblake@redhat.com> References: <20180105225753.30509-1-eblake@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.39]); Fri, 05 Jan 2018 22:58:49 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v7 19/20] vvfat: Switch to .bdrv_co_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: kwolf@redhat.com, vsementsov@virtuozzo.com, famz@redhat.com, qemu-block@nongnu.org, jcody@redhat.com, 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" We are gradually moving away from sector-based interfaces, towards byte-based. Update the vvfat driver accordingly. Note that we can rely on the block driver having already clamped limits to our block size, and simplify accordingly. Signed-off-by: Eric Blake Reviewed-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Fam Zheng --- v5-v7: no change v4: rebase to interface tweak v3: no change v2: rebase to earlier changes, simplify --- block/vvfat.c | 16 +++++++--------- 1 file changed, 7 insertions(+), 9 deletions(-) diff --git a/block/vvfat.c b/block/vvfat.c index a690595f2c..37d85a389f 100644 --- a/block/vvfat.c +++ b/block/vvfat.c @@ -3086,15 +3086,13 @@ vvfat_co_pwritev(BlockDriverState *bs, uint64_t off= set, uint64_t bytes, return ret; } -static int64_t coroutine_fn vvfat_co_get_block_status(BlockDriverState *bs, - int64_t sector_num, int nb_sectors, int *n, BlockDriverState **fil= e) +static int coroutine_fn vvfat_co_block_status(BlockDriverState *bs, + bool want_zero, int64_t offs= et, + int64_t bytes, int64_t *n, + int64_t *map, + BlockDriverState **file) { - *n =3D bs->total_sectors - sector_num; - if (*n > nb_sectors) { - *n =3D nb_sectors; - } else if (*n < 0) { - return 0; - } + *n =3D bytes; return BDRV_BLOCK_DATA; } @@ -3255,7 +3253,7 @@ static BlockDriver bdrv_vvfat =3D { .bdrv_co_preadv =3D vvfat_co_preadv, .bdrv_co_pwritev =3D vvfat_co_pwritev, - .bdrv_co_get_block_status =3D vvfat_co_get_block_status, + .bdrv_co_block_status =3D vvfat_co_block_status, }; static void bdrv_vvfat_init(void) --=20 2.14.3 From nobody Sun Oct 5 17:36:07 2025 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.zohomail.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 1515194069565795.6165316708158; Fri, 5 Jan 2018 15:14:29 -0800 (PST) Received: from localhost ([::1]:34859 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXbC0-0001KL-Ou for importer@patchew.org; Fri, 05 Jan 2018 18:14:28 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48078) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eXax2-0003be-8Q for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:59:01 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eXax0-0000dl-Ty for qemu-devel@nongnu.org; Fri, 05 Jan 2018 17:59:00 -0500 Received: from mx1.redhat.com ([209.132.183.28]:48966) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eXawx-0000b0-IC; Fri, 05 Jan 2018 17:58:55 -0500 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id A3D2619C32F; Fri, 5 Jan 2018 22:58:54 +0000 (UTC) Received: from red.redhat.com (ovpn-124-124.rdu2.redhat.com [10.10.124.124]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1A58860BE7; Fri, 5 Jan 2018 22:58:49 +0000 (UTC) From: Eric Blake To: qemu-devel@nongnu.org Date: Fri, 5 Jan 2018 16:57:53 -0600 Message-Id: <20180105225753.30509-21-eblake@redhat.com> In-Reply-To: <20180105225753.30509-1-eblake@redhat.com> References: <20180105225753.30509-1-eblake@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Fri, 05 Jan 2018 22:58:54 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v7 20/20] block: Drop unused .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: kwolf@redhat.com, vsementsov@virtuozzo.com, famz@redhat.com, qemu-block@nongnu.org, jcody@redhat.com, Max Reitz , Stefan Hajnoczi 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" We are gradually moving away from sector-based interfaces, towards byte-based. Now that all drivers have been updated to provide the byte-based .bdrv_co_block_status(), we can delete the sector-based interface. Signed-off-by: Eric Blake Reviewed-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Fam Zheng --- v7: no change v6: rebase to changes in patch 1, drop R-b v5: rebase to master v4: rebase to interface tweak v3: no change v2: rebase to earlier changes --- include/block/block_int.h | 3 --- block/io.c | 50 ++++++++++---------------------------------= ---- 2 files changed, 10 insertions(+), 43 deletions(-) diff --git a/include/block/block_int.h b/include/block/block_int.h index d4509a2711..f019af7dbc 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -217,9 +217,6 @@ struct BlockDriver { * as well as non-NULL pnum, map, and file; in turn, the driver * must return an error or set pnum to an aligned non-zero value. */ - int64_t coroutine_fn (*bdrv_co_get_block_status)(BlockDriverState *bs, - int64_t sector_num, int nb_sectors, int *pnum, - BlockDriverState **file); int coroutine_fn (*bdrv_co_block_status)(BlockDriverState *bs, bool want_zero, int64_t offset, int64_t bytes, int64_t *pnum, int64_t *map, BlockDriverState **file); diff --git a/block/io.c b/block/io.c index 087cb89b86..23af7eff20 100644 --- a/block/io.c +++ b/block/io.c @@ -1963,7 +1963,7 @@ static int coroutine_fn bdrv_co_block_status(BlockDri= verState *bs, /* Must be non-NULL or bdrv_getlength() would have failed */ assert(bs->drv); - if (!bs->drv->bdrv_co_get_block_status && !bs->drv->bdrv_co_block_stat= us) { + if (!bs->drv->bdrv_co_block_status) { *pnum =3D bytes; ret =3D BDRV_BLOCK_DATA | BDRV_BLOCK_ALLOCATED; if (offset + bytes =3D=3D total_size) { @@ -1981,53 +1981,23 @@ static int coroutine_fn bdrv_co_block_status(BlockD= riverState *bs, /* Round out to request_alignment boundaries */ align =3D bs->bl.request_alignment; - if (bs->drv->bdrv_co_get_block_status && align < BDRV_SECTOR_SIZE) { - align =3D BDRV_SECTOR_SIZE; - } aligned_offset =3D QEMU_ALIGN_DOWN(offset, align); aligned_bytes =3D ROUND_UP(offset + bytes, align) - aligned_offset; - if (bs->drv->bdrv_co_get_block_status) { - int count; /* sectors */ - int64_t longret; - - assert(QEMU_IS_ALIGNED(aligned_offset | aligned_bytes, - BDRV_SECTOR_SIZE)); - /* - * The contract allows us to return pnum smaller than bytes, even - * if the next query would see the same status; we truncate the - * request to avoid overflowing the driver's 32-bit interface. - */ - longret =3D bs->drv->bdrv_co_get_block_status( - bs, aligned_offset >> BDRV_SECTOR_BITS, - MIN(INT_MAX, aligned_bytes) >> BDRV_SECTOR_BITS, &count, - &local_file); - if (longret < 0) { - assert(INT_MIN <=3D longret); - ret =3D longret; - goto out; - } - if (longret & BDRV_BLOCK_OFFSET_VALID) { - local_map =3D longret & BDRV_BLOCK_OFFSET_MASK; - } - ret =3D longret & ~BDRV_BLOCK_OFFSET_MASK; - *pnum =3D count * BDRV_SECTOR_SIZE; - } else { - ret =3D bs->drv->bdrv_co_block_status(bs, want_zero, aligned_offse= t, - aligned_bytes, pnum, &local_ma= p, - &local_file); - if (ret < 0) { - *pnum =3D 0; - goto out; - } - assert(*pnum); /* The block driver must make progress */ + ret =3D bs->drv->bdrv_co_block_status(bs, want_zero, aligned_offset, + aligned_bytes, pnum, &local_map, + &local_file); + if (ret < 0) { + *pnum =3D 0; + goto out; } /* - * The driver's result must be a multiple of request_alignment. + * The driver's result must be a non-zero multiple of request_alignmen= t. * Clamp pnum and adjust map to original request. */ - assert(QEMU_IS_ALIGNED(*pnum, align) && align > offset - aligned_offse= t); + assert(*pnum && QEMU_IS_ALIGNED(*pnum, align) && + align > offset - aligned_offset); *pnum -=3D offset - aligned_offset; if (*pnum > bytes) { *pnum =3D bytes; --=20 2.14.3