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dkim=none (message not signed) header.d=none;nongnu.org; dmarc=none action=none header.from=virtuozzo.com; From: Vladimir Sementsov-Ogievskiy To: qemu-block@nongnu.org Cc: qemu-devel@nongnu.org, armbru@redhat.com, berto@igalia.com, vsementsov@virtuozzo.com, eblake@redhat.com, jsnow@redhat.com, stefanha@redhat.com, pbonzini@redhat.com, pavel.dovgaluk@ispras.ru, ari@tuxera.com, mreitz@redhat.com, kwolf@redhat.com, groug@kaod.org Subject: [PATCH 01/14] block: return status from bdrv_append and friends Date: Wed, 9 Sep 2020 21:59:17 +0300 Message-Id: <20200909185930.26524-2-vsementsov@virtuozzo.com> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20200909185930.26524-1-vsementsov@virtuozzo.com> References: <20200909185930.26524-1-vsementsov@virtuozzo.com> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: AM3PR07CA0054.eurprd07.prod.outlook.com (2603:10a6:207:4::12) To AM7PR08MB5494.eurprd08.prod.outlook.com (2603:10a6:20b:dc::15) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-Mailer: git-send-email 2.21.3 X-Originating-IP: [185.215.60.136] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 2fe1c2ad-2769-450e-a221-08d854f28818 X-MS-TrafficTypeDiagnostic: AM6PR08MB3445: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:343; 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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=40.107.7.118; envelope-from=vsementsov@virtuozzo.com; helo=EUR04-HE1-obe.outbound.protection.outlook.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/09 14:59:58 X-ACL-Warn: Detected OS = Windows NT kernel [generic] [fuzzy] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, MSGID_FROM_MTA_HEADER=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @virtuozzo.com) Content-Type: text/plain; charset="utf-8" The recommended use of qemu error api assumes returning status together with setting errp and avoid void functions with errp parameter. Let's improve bdrv_append and some friends to reduce error-propagation overhead in further patches. Choose int return status, because bdrv_replace_node() has call to bdrv_check_update_perm(), which reports int status, which seems correct to propagate. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Alberto Garcia Reviewed-by: Greg Kurz --- include/block/block.h | 12 ++++++------ block.c | 39 ++++++++++++++++++++++++--------------- 2 files changed, 30 insertions(+), 21 deletions(-) diff --git a/include/block/block.h b/include/block/block.h index 6e36154061..03b3cee8f8 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -336,10 +336,10 @@ int bdrv_create(BlockDriver *drv, const char* filenam= e, int bdrv_create_file(const char *filename, QemuOpts *opts, Error **errp); =20 BlockDriverState *bdrv_new(void); -void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top, - Error **errp); -void bdrv_replace_node(BlockDriverState *from, BlockDriverState *to, - Error **errp); +int bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top, + Error **errp); +int bdrv_replace_node(BlockDriverState *from, BlockDriverState *to, + Error **errp); =20 int bdrv_parse_aio(const char *mode, int *flags); int bdrv_parse_cache_mode(const char *mode, int *flags, bool *writethrough= ); @@ -351,8 +351,8 @@ BdrvChild *bdrv_open_child(const char *filename, BdrvChildRole child_role, bool allow_none, Error **errp); BlockDriverState *bdrv_open_blockdev_ref(BlockdevRef *ref, Error **errp); -void bdrv_set_backing_hd(BlockDriverState *bs, BlockDriverState *backing_h= d, - Error **errp); +int bdrv_set_backing_hd(BlockDriverState *bs, BlockDriverState *backing_hd, + Error **errp); int bdrv_open_backing_file(BlockDriverState *bs, QDict *parent_options, const char *bdref_key, Error **errp); BlockDriverState *bdrv_open(const char *filename, const char *reference, diff --git a/block.c b/block.c index 2ba76b2c36..6d35449027 100644 --- a/block.c +++ b/block.c @@ -2866,14 +2866,15 @@ static BdrvChildRole bdrv_backing_role(BlockDriverS= tate *bs) * Sets the backing file link of a BDS. A new reference is created; callers * which don't need their own reference any more must call bdrv_unref(). */ -void bdrv_set_backing_hd(BlockDriverState *bs, BlockDriverState *backing_h= d, +int bdrv_set_backing_hd(BlockDriverState *bs, BlockDriverState *backing_hd, Error **errp) { + int ret =3D 0; bool update_inherits_from =3D bdrv_chain_contains(bs, backing_hd) && bdrv_inherits_from_recursive(backing_hd, bs); =20 if (bdrv_is_backing_chain_frozen(bs, backing_bs(bs), errp)) { - return; + return -EPERM; } =20 if (backing_hd) { @@ -2891,15 +2892,22 @@ void bdrv_set_backing_hd(BlockDriverState *bs, Bloc= kDriverState *backing_hd, =20 bs->backing =3D bdrv_attach_child(bs, backing_hd, "backing", &child_of= _bds, bdrv_backing_role(bs), errp); + if (!bs->backing) { + ret =3D -EINVAL; + goto out; + } + /* If backing_hd was already part of bs's backing chain, and * inherits_from pointed recursively to bs then let's update it to * point directly to bs (else it will become NULL). */ - if (bs->backing && update_inherits_from) { + if (update_inherits_from) { backing_hd->inherits_from =3D bs; } =20 out: bdrv_refresh_limits(bs, NULL); + + return ret; } =20 /* @@ -4517,8 +4525,8 @@ static bool should_update_child(BdrvChild *c, BlockDr= iverState *to) return ret; } =20 -void bdrv_replace_node(BlockDriverState *from, BlockDriverState *to, - Error **errp) +int bdrv_replace_node(BlockDriverState *from, BlockDriverState *to, + Error **errp) { BdrvChild *c, *next; GSList *list =3D NULL, *p; @@ -4540,6 +4548,7 @@ void bdrv_replace_node(BlockDriverState *from, BlockD= riverState *to, continue; } if (c->frozen) { + ret =3D -EPERM; error_setg(errp, "Cannot change '%s' link to '%s'", c->name, from->node_name); goto out; @@ -4575,6 +4584,8 @@ out: g_slist_free(list); bdrv_drained_end(from); bdrv_unref(from); + + return ret; } =20 /* @@ -4593,20 +4604,16 @@ out: * parents of bs_top after bdrv_append() returns. If the caller needs to k= eep a * reference of its own, it must call bdrv_ref(). */ -void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top, - Error **errp) +int bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top, + Error **errp) { - Error *local_err =3D NULL; - - bdrv_set_backing_hd(bs_new, bs_top, &local_err); - if (local_err) { - error_propagate(errp, local_err); + int ret =3D bdrv_set_backing_hd(bs_new, bs_top, errp); + if (ret < 0) { goto out; } =20 - bdrv_replace_node(bs_top, bs_new, &local_err); - if (local_err) { - error_propagate(errp, local_err); + ret =3D bdrv_replace_node(bs_top, bs_new, errp); + if (ret < 0) { bdrv_set_backing_hd(bs_new, NULL, &error_abort); goto out; } @@ -4615,6 +4622,8 @@ void bdrv_append(BlockDriverState *bs_new, BlockDrive= rState *bs_top, * additional reference any more. */ out: bdrv_unref(bs_new); + + return ret; } =20 static void bdrv_delete(BlockDriverState *bs) --=20 2.21.3 From nobody Sun May 5 02:41:46 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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dkim=none (message not signed) header.d=none;nongnu.org; dmarc=none action=none header.from=virtuozzo.com; From: Vladimir Sementsov-Ogievskiy To: qemu-block@nongnu.org Cc: qemu-devel@nongnu.org, armbru@redhat.com, berto@igalia.com, vsementsov@virtuozzo.com, eblake@redhat.com, jsnow@redhat.com, stefanha@redhat.com, pbonzini@redhat.com, pavel.dovgaluk@ispras.ru, ari@tuxera.com, mreitz@redhat.com, kwolf@redhat.com, groug@kaod.org Subject: [PATCH 02/14] block: use return status of bdrv_append() Date: Wed, 9 Sep 2020 21:59:18 +0300 Message-Id: <20200909185930.26524-3-vsementsov@virtuozzo.com> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20200909185930.26524-1-vsementsov@virtuozzo.com> References: <20200909185930.26524-1-vsementsov@virtuozzo.com> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: AM3PR07CA0054.eurprd07.prod.outlook.com (2603:10a6:207:4::12) To AM7PR08MB5494.eurprd08.prod.outlook.com (2603:10a6:20b:dc::15) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-Mailer: git-send-email 2.21.3 X-Originating-IP: [185.215.60.136] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 36c3b513-a351-4676-8567-08d854f288d1 X-MS-TrafficTypeDiagnostic: AM6PR08MB3445: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:40; 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charset="utf-8" Now bdrv_append returns status and we can drop all the local_err things around it. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Alberto Garcia Reviewed-by: Greg Kurz --- block.c | 5 +---- block/backup-top.c | 20 ++++++++------------ block/commit.c | 5 +---- block/mirror.c | 6 ++---- blockdev.c | 4 +--- tests/test-bdrv-graph-mod.c | 6 +++--- 6 files changed, 16 insertions(+), 30 deletions(-) diff --git a/block.c b/block.c index 6d35449027..9b624b2535 100644 --- a/block.c +++ b/block.c @@ -3156,7 +3156,6 @@ static BlockDriverState *bdrv_append_temp_snapshot(Bl= ockDriverState *bs, int64_t total_size; QemuOpts *opts =3D NULL; BlockDriverState *bs_snapshot =3D NULL; - Error *local_err =3D NULL; int ret; =20 /* if snapshot, we create a temporary backing file and open it @@ -3203,9 +3202,7 @@ static BlockDriverState *bdrv_append_temp_snapshot(Bl= ockDriverState *bs, * order to be able to return one, we have to increase * bs_snapshot's refcount here */ bdrv_ref(bs_snapshot); - bdrv_append(bs_snapshot, bs, &local_err); - if (local_err) { - error_propagate(errp, local_err); + if (bdrv_append(bs_snapshot, bs, errp) < 0) { bs_snapshot =3D NULL; goto out; } diff --git a/block/backup-top.c b/block/backup-top.c index af2f20f346..de9d5e1634 100644 --- a/block/backup-top.c +++ b/block/backup-top.c @@ -192,7 +192,7 @@ BlockDriverState *bdrv_backup_top_append(BlockDriverSta= te *source, BlockCopyState **bcs, Error **errp) { - Error *local_err =3D NULL; + ERRP_GUARD(); BDRVBackupTopState *state; BlockDriverState *top; bool appended =3D false; @@ -225,9 +225,8 @@ BlockDriverState *bdrv_backup_top_append(BlockDriverSta= te *source, bdrv_drained_begin(source); =20 bdrv_ref(top); - bdrv_append(top, source, &local_err); - if (local_err) { - error_prepend(&local_err, "Cannot append backup-top filter: "); + if (bdrv_append(top, source, errp) < 0) { + error_prepend(errp, "Cannot append backup-top filter: "); goto fail; } appended =3D true; @@ -237,18 +236,16 @@ BlockDriverState *bdrv_backup_top_append(BlockDriverS= tate *source, * we want. */ state->active =3D true; - bdrv_child_refresh_perms(top, top->backing, &local_err); - if (local_err) { - error_prepend(&local_err, - "Cannot set permissions for backup-top filter: "); + if (bdrv_child_refresh_perms(top, top->backing, errp) < 0) { + error_prepend(errp, "Cannot set permissions for backup-top filter:= "); goto fail; } =20 state->cluster_size =3D cluster_size; state->bcs =3D block_copy_state_new(top->backing, state->target, - cluster_size, write_flags, &local_er= r); - if (local_err) { - error_prepend(&local_err, "Cannot create block-copy-state: "); + cluster_size, write_flags, errp); + if (!state->bcs) { + error_prepend(errp, "Cannot create block-copy-state: "); goto fail; } *bcs =3D state->bcs; @@ -266,7 +263,6 @@ fail: } =20 bdrv_drained_end(source); - error_propagate(errp, local_err); =20 return NULL; } diff --git a/block/commit.c b/block/commit.c index 7732d02dfe..7720d4729b 100644 --- a/block/commit.c +++ b/block/commit.c @@ -253,7 +253,6 @@ void commit_start(const char *job_id, BlockDriverState = *bs, CommitBlockJob *s; BlockDriverState *iter; BlockDriverState *commit_top_bs =3D NULL; - Error *local_err =3D NULL; int ret; =20 assert(top !=3D bs); @@ -292,10 +291,8 @@ void commit_start(const char *job_id, BlockDriverState= *bs, =20 commit_top_bs->total_sectors =3D top->total_sectors; =20 - bdrv_append(commit_top_bs, top, &local_err); - if (local_err) { + if (bdrv_append(commit_top_bs, top, errp) < 0) { commit_top_bs =3D NULL; - error_propagate(errp, local_err); goto fail; } =20 diff --git a/block/mirror.c b/block/mirror.c index e8e8844afc..ca250f765d 100644 --- a/block/mirror.c +++ b/block/mirror.c @@ -1557,7 +1557,6 @@ static BlockJob *mirror_start_job( BlockDriverState *mirror_top_bs; bool target_graph_mod; bool target_is_backing; - Error *local_err =3D NULL; int ret; =20 if (granularity =3D=3D 0) { @@ -1606,12 +1605,11 @@ static BlockJob *mirror_start_job( * it alive until block_job_create() succeeds even if bs has no parent= . */ bdrv_ref(mirror_top_bs); bdrv_drained_begin(bs); - bdrv_append(mirror_top_bs, bs, &local_err); + ret =3D bdrv_append(mirror_top_bs, bs, errp); bdrv_drained_end(bs); =20 - if (local_err) { + if (ret < 0) { bdrv_unref(mirror_top_bs); - error_propagate(errp, local_err); return NULL; } =20 diff --git a/blockdev.c b/blockdev.c index 3848a9c8ab..36bef6b188 100644 --- a/blockdev.c +++ b/blockdev.c @@ -1576,9 +1576,7 @@ static void external_snapshot_prepare(BlkActionState = *common, * can fail, so we need to do it in .prepare; undoing it for abort is * always possible. */ bdrv_ref(state->new_bs); - bdrv_append(state->new_bs, state->old_bs, &local_err); - if (local_err) { - error_propagate(errp, local_err); + if (bdrv_append(state->new_bs, state->old_bs, errp) < 0) { goto out; } state->overlay_appended =3D true; diff --git a/tests/test-bdrv-graph-mod.c b/tests/test-bdrv-graph-mod.c index 8cff13830e..2b71601c24 100644 --- a/tests/test-bdrv-graph-mod.c +++ b/tests/test-bdrv-graph-mod.c @@ -101,7 +101,7 @@ static BlockDriverState *pass_through_node(const char *= name) */ static void test_update_perm_tree(void) { - Error *local_err =3D NULL; + int ret; =20 BlockBackend *root =3D blk_new(qemu_get_aio_context(), BLK_PERM_WRITE | BLK_PERM_CONSISTENT_READ, @@ -114,8 +114,8 @@ static void test_update_perm_tree(void) bdrv_attach_child(filter, bs, "child", &child_of_bds, BDRV_CHILD_FILTERED | BDRV_CHILD_PRIMARY, &error_abo= rt); =20 - bdrv_append(filter, bs, &local_err); - error_free_or_abort(&local_err); + ret =3D bdrv_append(filter, bs, NULL); + assert(ret < 0); =20 blk_unref(root); } --=20 2.21.3 From nobody Sun May 5 02:41:46 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; arc=pass (i=1dmarc=pass fromdomain=virtuozzo.com); dmarc=pass(p=quarantine dis=none) header.from=virtuozzo.com ARC-Seal: i=2; a=rsa-sha256; t=1599678277; cv=pass; d=zohomail.com; s=zohoarc; b=l1vT93J6e3CxFTesiWvmjwLrLmUTkqDC28Iq0H3kbCkHC3h2SYiscvGjXHwVeeeHpmFTbHlV6Ob2291+ooSX0bTAoL5RL4sAtAz2dU9oRHtU5F3HM6f6MFVJ7/6Ft4ItxbN9rr9pFoYeWV1b0V/t4Oq0P73jIDFx/aI1sHNDIac= ARC-Message-Signature: i=2; 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charset="utf-8" This patch is generated by cocci script: @@ symbol bdrv_open_child, errp, local_err; expression file; @@ file =3D bdrv_open_child(..., - &local_err + errp ); - if (local_err) + if (!file) { ... - error_propagate(errp, local_err); ... } with command spatch --sp-file x.cocci --macro-file scripts/cocci-macro-file.h \ --in-place --no-show-diff --max-width 80 --use-gitgrep block Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Alberto Garcia Reviewed-by: Greg Kurz --- block/blkdebug.c | 6 ++---- block/blklogwrites.c | 10 ++++------ block/blkreplay.c | 6 ++---- block/blkverify.c | 11 ++++------- block/qcow2.c | 5 ++--- block/quorum.c | 6 ++---- 6 files changed, 16 insertions(+), 28 deletions(-) diff --git a/block/blkdebug.c b/block/blkdebug.c index 9c08d8a005..61aaee9879 100644 --- a/block/blkdebug.c +++ b/block/blkdebug.c @@ -464,7 +464,6 @@ static int blkdebug_open(BlockDriverState *bs, QDict *o= ptions, int flags, { BDRVBlkdebugState *s =3D bs->opaque; QemuOpts *opts; - Error *local_err =3D NULL; int ret; uint64_t align; =20 @@ -494,10 +493,9 @@ static int blkdebug_open(BlockDriverState *bs, QDict *= options, int flags, bs->file =3D bdrv_open_child(qemu_opt_get(opts, "x-image"), options, "= image", bs, &child_of_bds, BDRV_CHILD_FILTERED | BDRV_CHILD_PRIMARY, - false, &local_err); - if (local_err) { + false, errp); + if (!bs->file) { ret =3D -EINVAL; - error_propagate(errp, local_err); goto out; } =20 diff --git a/block/blklogwrites.c b/block/blklogwrites.c index 57315f56b4..7ef046cee9 100644 --- a/block/blklogwrites.c +++ b/block/blklogwrites.c @@ -157,19 +157,17 @@ static int blk_log_writes_open(BlockDriverState *bs, = QDict *options, int flags, /* Open the file */ bs->file =3D bdrv_open_child(NULL, options, "file", bs, &child_of_bds, BDRV_CHILD_FILTERED | BDRV_CHILD_PRIMARY, f= alse, - &local_err); - if (local_err) { + errp); + if (!bs->file) { ret =3D -EINVAL; - error_propagate(errp, local_err); goto fail; } =20 /* Open the log file */ s->log_file =3D bdrv_open_child(NULL, options, "log", bs, &child_of_bd= s, - BDRV_CHILD_METADATA, false, &local_err); - if (local_err) { + BDRV_CHILD_METADATA, false, errp); + if (!s->log_file) { ret =3D -EINVAL; - error_propagate(errp, local_err); goto fail; } =20 diff --git a/block/blkreplay.c b/block/blkreplay.c index 30a0f5d57a..4a247752fd 100644 --- a/block/blkreplay.c +++ b/block/blkreplay.c @@ -23,16 +23,14 @@ typedef struct Request { static int blkreplay_open(BlockDriverState *bs, QDict *options, int flags, Error **errp) { - Error *local_err =3D NULL; int ret; =20 /* Open the image file */ bs->file =3D bdrv_open_child(NULL, options, "image", bs, &child_of_bds, BDRV_CHILD_FILTERED | BDRV_CHILD_PRIMARY, - false, &local_err); - if (local_err) { + false, errp); + if (!bs->file) { ret =3D -EINVAL; - error_propagate(errp, local_err); goto fail; } =20 diff --git a/block/blkverify.c b/block/blkverify.c index 4aed53ab59..95ae73e2aa 100644 --- a/block/blkverify.c +++ b/block/blkverify.c @@ -112,7 +112,6 @@ static int blkverify_open(BlockDriverState *bs, QDict *= options, int flags, { BDRVBlkverifyState *s =3D bs->opaque; QemuOpts *opts; - Error *local_err =3D NULL; int ret; =20 opts =3D qemu_opts_create(&runtime_opts, NULL, 0, &error_abort); @@ -125,20 +124,18 @@ static int blkverify_open(BlockDriverState *bs, QDict= *options, int flags, bs->file =3D bdrv_open_child(qemu_opt_get(opts, "x-raw"), options, "ra= w", bs, &child_of_bds, BDRV_CHILD_FILTERED | BDRV_CHILD_PRIMARY, - false, &local_err); - if (local_err) { + false, errp); + if (!bs->file) { ret =3D -EINVAL; - error_propagate(errp, local_err); goto fail; } =20 /* Open the test file */ s->test_file =3D bdrv_open_child(qemu_opt_get(opts, "x-image"), option= s, "test", bs, &child_of_bds, BDRV_CHILD_D= ATA, - false, &local_err); - if (local_err) { + false, errp); + if (!s->test_file) { ret =3D -EINVAL; - error_propagate(errp, local_err); goto fail; } =20 diff --git a/block/qcow2.c b/block/qcow2.c index da56b1a4df..10175fa399 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -1613,9 +1613,8 @@ static int coroutine_fn qcow2_do_open(BlockDriverStat= e *bs, QDict *options, /* Open external data file */ s->data_file =3D bdrv_open_child(NULL, options, "data-file", bs, &child_of_bds, BDRV_CHILD_DATA, - true, &local_err); - if (local_err) { - error_propagate(errp, local_err); + true, errp); + if (!s->data_file) { ret =3D -EINVAL; goto fail; } diff --git a/block/quorum.c b/block/quorum.c index 6df9449fc2..672b09e13d 100644 --- a/block/quorum.c +++ b/block/quorum.c @@ -898,7 +898,6 @@ static int quorum_open(BlockDriverState *bs, QDict *opt= ions, int flags, Error **errp) { BDRVQuorumState *s =3D bs->opaque; - Error *local_err =3D NULL; QemuOpts *opts =3D NULL; const char *pattern_str; bool *opened; @@ -976,9 +975,8 @@ static int quorum_open(BlockDriverState *bs, QDict *opt= ions, int flags, =20 s->children[i] =3D bdrv_open_child(NULL, options, indexstr, bs, &child_of_bds, BDRV_CHILD_DATA, f= alse, - &local_err); - if (local_err) { - error_propagate(errp, local_err); + errp); + if (!s->children[i]) { ret =3D -EINVAL; goto close_exit; } --=20 2.21.3 From nobody Sun May 5 02:41:46 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; 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charset="utf-8" We leak local_err and don't report failure to the caller. It's definitely wrong, let's fix. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Alberto Garcia Reviewed-by: Greg Kurz --- blockdev.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/blockdev.c b/blockdev.c index 36bef6b188..74259527c1 100644 --- a/blockdev.c +++ b/blockdev.c @@ -1797,8 +1797,7 @@ static void drive_backup_prepare(BlkActionState *comm= on, Error **errp) aio_context_acquire(aio_context); =20 if (set_backing_hd) { - bdrv_set_backing_hd(target_bs, source, &local_err); - if (local_err) { + if (bdrv_set_backing_hd(target_bs, source, errp) < 0) { goto unref; } } --=20 2.21.3 From nobody Sun May 5 02:41:46 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; arc=pass (i=1dmarc=pass fromdomain=virtuozzo.com); dmarc=pass(p=quarantine dis=none) header.from=virtuozzo.com ARC-Seal: i=2; a=rsa-sha256; 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dkim=none (message not signed) header.d=none;nongnu.org; dmarc=none action=none header.from=virtuozzo.com; From: Vladimir Sementsov-Ogievskiy To: qemu-block@nongnu.org Cc: qemu-devel@nongnu.org, armbru@redhat.com, berto@igalia.com, vsementsov@virtuozzo.com, eblake@redhat.com, jsnow@redhat.com, stefanha@redhat.com, pbonzini@redhat.com, pavel.dovgaluk@ispras.ru, ari@tuxera.com, mreitz@redhat.com, kwolf@redhat.com, groug@kaod.org Subject: [PATCH 05/14] block: drop extra error propagation for bdrv_set_backing_hd Date: Wed, 9 Sep 2020 21:59:21 +0300 Message-Id: <20200909185930.26524-6-vsementsov@virtuozzo.com> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20200909185930.26524-1-vsementsov@virtuozzo.com> References: <20200909185930.26524-1-vsementsov@virtuozzo.com> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: AM3PR07CA0054.eurprd07.prod.outlook.com (2603:10a6:207:4::12) To AM7PR08MB5494.eurprd08.prod.outlook.com (2603:10a6:20b:dc::15) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-Mailer: git-send-email 2.21.3 X-Originating-IP: [185.215.60.136] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 953baf30-4bb4-41ed-26f1-08d854f28ace X-MS-TrafficTypeDiagnostic: AM6PR08MB3445: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:765; 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charset="utf-8" bdrv_set_backing_hd now returns status, let's use it. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Alberto Garcia Reviewed-by: Greg Kurz --- block.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/block.c b/block.c index 9b624b2535..c5e3a1927e 100644 --- a/block.c +++ b/block.c @@ -3011,11 +3011,9 @@ int bdrv_open_backing_file(BlockDriverState *bs, QDi= ct *parent_options, =20 /* Hook up the backing file link; drop our reference, bs owns the * backing_hd reference now */ - bdrv_set_backing_hd(bs, backing_hd, &local_err); + ret =3D bdrv_set_backing_hd(bs, backing_hd, errp); bdrv_unref(backing_hd); - if (local_err) { - error_propagate(errp, local_err); - ret =3D -EINVAL; + if (ret < 0) { goto free_exit; } =20 --=20 2.21.3 From nobody Sun May 5 02:41:46 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; arc=pass (i=1dmarc=pass fromdomain=virtuozzo.com); 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dkim=none (message not signed) header.d=none;nongnu.org; dmarc=none action=none header.from=virtuozzo.com; From: Vladimir Sementsov-Ogievskiy To: qemu-block@nongnu.org Cc: qemu-devel@nongnu.org, armbru@redhat.com, berto@igalia.com, vsementsov@virtuozzo.com, eblake@redhat.com, jsnow@redhat.com, stefanha@redhat.com, pbonzini@redhat.com, pavel.dovgaluk@ispras.ru, ari@tuxera.com, mreitz@redhat.com, kwolf@redhat.com, groug@kaod.org Subject: [PATCH 06/14] block/mirror: drop extra error propagation in commit_active_start() Date: Wed, 9 Sep 2020 21:59:22 +0300 Message-Id: <20200909185930.26524-7-vsementsov@virtuozzo.com> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20200909185930.26524-1-vsementsov@virtuozzo.com> References: <20200909185930.26524-1-vsementsov@virtuozzo.com> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: AM3PR07CA0054.eurprd07.prod.outlook.com (2603:10a6:207:4::12) To AM7PR08MB5494.eurprd08.prod.outlook.com (2603:10a6:20b:dc::15) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-Mailer: git-send-email 2.21.3 X-Originating-IP: [185.215.60.136] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: b79b850c-6da4-4af6-b88f-08d854f28b75 X-MS-TrafficTypeDiagnostic: AM6PR08MB3445: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:268; 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charset="utf-8" Let's check return value of mirror_start_job to check for failure instead of local_err. Rename ret to job, as ret is usually integer variable. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Alberto Garcia Reviewed-by: Greg Kurz --- block/mirror.c | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-) diff --git a/block/mirror.c b/block/mirror.c index ca250f765d..529ba12b2a 100644 --- a/block/mirror.c +++ b/block/mirror.c @@ -1788,8 +1788,7 @@ BlockJob *commit_active_start(const char *job_id, Blo= ckDriverState *bs, bool auto_complete, Error **errp) { bool base_read_only; - Error *local_err =3D NULL; - BlockJob *ret; + BlockJob *job; =20 base_read_only =3D bdrv_is_read_only(base); =20 @@ -1799,19 +1798,18 @@ BlockJob *commit_active_start(const char *job_id, B= lockDriverState *bs, } } =20 - ret =3D mirror_start_job( + job =3D mirror_start_job( job_id, bs, creation_flags, base, NULL, speed, 0, 0, MIRROR_LEAVE_BACKING_CHAIN, false, on_error, on_error, true, cb, opaque, &commit_active_job_driver, false, base, auto_complete, filter_node_name, false, MIRROR_COPY_MODE_BACKGROUND, - &local_err); - if (local_err) { - error_propagate(errp, local_err); + errp); + if (!job) { goto error_restore_flags; } =20 - return ret; + return job; =20 error_restore_flags: /* ignore error and errp for bdrv_reopen, because we want to propagate --=20 2.21.3 From nobody Sun May 5 02:41:46 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; arc=pass (i=1dmarc=pass fromdomain=virtuozzo.com); dmarc=pass(p=quarantine dis=none) header.from=virtuozzo.com ARC-Seal: i=2; a=rsa-sha256; t=1599678208; cv=pass; d=zohomail.com; s=zohoarc; b=cgtPq0Yu8FUzx+cIe4AWrFYUhBP7xYtSbOVBdDB1pka1dB/f5W4DELpw2IMncK2T6J6atdsem1FgL7WNRXg+jlZEzrP0OCoPn/6M/2t5rqiJQkRdjrLlr8eX/8UCjDukZLLnYyq22UxyhC+5pZR18Tos5t7diYnz5BLT2mUY0JM= ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1599678208; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; 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charset="utf-8" It's simple to avoid error propagation in blk_log_writes_open(), we just need to refactor blk_log_writes_find_cur_log_sector() a bit. Signed-off-by: Vladimir Sementsov-Ogievskiy --- block/blklogwrites.c | 23 +++++++++++------------ 1 file changed, 11 insertions(+), 12 deletions(-) diff --git a/block/blklogwrites.c b/block/blklogwrites.c index 7ef046cee9..c7da507b2d 100644 --- a/block/blklogwrites.c +++ b/block/blklogwrites.c @@ -96,10 +96,10 @@ static inline bool blk_log_writes_sector_size_valid(uin= t32_t sector_size) sector_size < (1ull << 24); } =20 -static uint64_t blk_log_writes_find_cur_log_sector(BdrvChild *log, - uint32_t sector_size, - uint64_t nr_entries, - Error **errp) +static int64_t blk_log_writes_find_cur_log_sector(BdrvChild *log, + uint32_t sector_size, + uint64_t nr_entries, + Error **errp) { uint64_t cur_sector =3D 1; uint64_t cur_idx =3D 0; @@ -112,13 +112,13 @@ static uint64_t blk_log_writes_find_cur_log_sector(Bd= rvChild *log, if (read_ret < 0) { error_setg_errno(errp, -read_ret, "Failed to read log entry %"PRIu64, cur_idx); - return (uint64_t)-1ull; + return read_ret; } =20 if (cur_entry.flags & ~cpu_to_le64(LOG_FLAG_MASK)) { error_setg(errp, "Invalid flags 0x%"PRIx64" in log entry %"PRI= u64, le64_to_cpu(cur_entry.flags), cur_idx); - return (uint64_t)-1ull; + return -EINVAL; } =20 /* Account for the sector of the entry itself */ @@ -143,7 +143,6 @@ static int blk_log_writes_open(BlockDriverState *bs, QD= ict *options, int flags, { BDRVBlkLogWritesState *s =3D bs->opaque; QemuOpts *opts; - Error *local_err =3D NULL; int ret; uint64_t log_sector_size; bool log_append; @@ -215,15 +214,15 @@ static int blk_log_writes_open(BlockDriverState *bs, = QDict *options, int flags, s->nr_entries =3D 0; =20 if (blk_log_writes_sector_size_valid(log_sector_size)) { - s->cur_log_sector =3D + int64_t cur_log_sector =3D blk_log_writes_find_cur_log_sector(s->log_file, log_sector= _size, - le64_to_cpu(log_sb.nr_entries), &local= _err); - if (local_err) { - ret =3D -EINVAL; - error_propagate(errp, local_err); + le64_to_cpu(log_sb.nr_entries), errp); + if (cur_log_sector < 0) { + ret =3D cur_log_sector; goto fail_log; } =20 + s->cur_log_sector =3D cur_log_sector; s->nr_entries =3D le64_to_cpu(log_sb.nr_entries); } } else { --=20 2.21.3 From nobody Sun May 5 02:41:46 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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dkim=none (message not signed) header.d=none;nongnu.org; dmarc=none action=none header.from=virtuozzo.com; From: Vladimir Sementsov-Ogievskiy To: qemu-block@nongnu.org Cc: qemu-devel@nongnu.org, armbru@redhat.com, berto@igalia.com, vsementsov@virtuozzo.com, eblake@redhat.com, jsnow@redhat.com, stefanha@redhat.com, pbonzini@redhat.com, pavel.dovgaluk@ispras.ru, ari@tuxera.com, mreitz@redhat.com, kwolf@redhat.com, groug@kaod.org Subject: [PATCH 08/14] blockjob: return status from block_job_set_speed() Date: Wed, 9 Sep 2020 21:59:24 +0300 Message-Id: <20200909185930.26524-9-vsementsov@virtuozzo.com> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20200909185930.26524-1-vsementsov@virtuozzo.com> References: <20200909185930.26524-1-vsementsov@virtuozzo.com> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: AM3PR07CA0054.eurprd07.prod.outlook.com (2603:10a6:207:4::12) To AM7PR08MB5494.eurprd08.prod.outlook.com (2603:10a6:20b:dc::15) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-Mailer: git-send-email 2.21.3 X-Originating-IP: [185.215.60.136] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: cf8e86d3-063c-43c0-22ad-08d854f28cbb X-MS-TrafficTypeDiagnostic: AM6PR08MB3445: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:4303; 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charset="utf-8" Better to return status together with setting errp. It allows to avoid error propagation in the caller. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Alberto Garcia Reviewed-by: Greg Kurz --- include/block/blockjob.h | 2 +- blockjob.c | 18 ++++++++---------- 2 files changed, 9 insertions(+), 11 deletions(-) diff --git a/include/block/blockjob.h b/include/block/blockjob.h index 35faa3aa26..d200f33c10 100644 --- a/include/block/blockjob.h +++ b/include/block/blockjob.h @@ -139,7 +139,7 @@ bool block_job_has_bdrv(BlockJob *job, BlockDriverState= *bs); * Set a rate-limiting parameter for the job; the actual meaning may * vary depending on the job type. */ -void block_job_set_speed(BlockJob *job, int64_t speed, Error **errp); +bool block_job_set_speed(BlockJob *job, int64_t speed, Error **errp); =20 /** * block_job_query: diff --git a/blockjob.c b/blockjob.c index 470facfd47..afddf7a1fb 100644 --- a/blockjob.c +++ b/blockjob.c @@ -254,28 +254,30 @@ static bool job_timer_pending(Job *job) return timer_pending(&job->sleep_timer); } =20 -void block_job_set_speed(BlockJob *job, int64_t speed, Error **errp) +bool block_job_set_speed(BlockJob *job, int64_t speed, Error **errp) { int64_t old_speed =3D job->speed; =20 - if (job_apply_verb(&job->job, JOB_VERB_SET_SPEED, errp)) { - return; + if (job_apply_verb(&job->job, JOB_VERB_SET_SPEED, errp) < 0) { + return false; } if (speed < 0) { error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "speed", "a non-negative value"); - return; + return false; } =20 ratelimit_set_speed(&job->limit, speed, BLOCK_JOB_SLICE_TIME); =20 job->speed =3D speed; if (speed && speed <=3D old_speed) { - return; + return true; } =20 /* kick only if a timer is pending */ job_enter_cond(&job->job, job_timer_pending); + + return true; } =20 int64_t block_job_ratelimit_get_delay(BlockJob *job, uint64_t n) @@ -448,12 +450,8 @@ void *block_job_create(const char *job_id, const Block= JobDriver *driver, =20 /* Only set speed when necessary to avoid NotSupported error */ if (speed !=3D 0) { - Error *local_err =3D NULL; - - block_job_set_speed(job, speed, &local_err); - if (local_err) { + if (!block_job_set_speed(job, speed, errp)) { job_early_fail(&job->job); - error_propagate(errp, local_err); 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charset="utf-8" Don't use error propagation in qcow2_get_specific_info(). For this refactor qcow2_get_bitmap_info_list, its current interface rather weird. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Greg Kurz --- block/qcow2.h | 4 ++-- block/qcow2-bitmap.c | 27 +++++++++++++-------------- block/qcow2.c | 10 +++------- 3 files changed, 18 insertions(+), 23 deletions(-) diff --git a/block/qcow2.h b/block/qcow2.h index 065ec3df0b..ac6a2d3e2a 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -967,8 +967,8 @@ int qcow2_check_bitmaps_refcounts(BlockDriverState *bs,= BdrvCheckResult *res, void **refcount_table, int64_t *refcount_table_size); bool qcow2_load_dirty_bitmaps(BlockDriverState *bs, Error **errp); -Qcow2BitmapInfoList *qcow2_get_bitmap_info_list(BlockDriverState *bs, - Error **errp); +bool qcow2_get_bitmap_info_list(BlockDriverState *bs, + Qcow2BitmapInfoList **info_list, Error **e= rrp); int qcow2_reopen_bitmaps_rw(BlockDriverState *bs, Error **errp); int qcow2_truncate_bitmaps_check(BlockDriverState *bs, Error **errp); void qcow2_store_persistent_dirty_bitmaps(BlockDriverState *bs, diff --git a/block/qcow2-bitmap.c b/block/qcow2-bitmap.c index 8c34b2aef7..9b14c0791f 100644 --- a/block/qcow2-bitmap.c +++ b/block/qcow2-bitmap.c @@ -1090,30 +1090,29 @@ static Qcow2BitmapInfoFlagsList *get_bitmap_info_fl= ags(uint32_t flags) /* * qcow2_get_bitmap_info_list() * Returns a list of QCOW2 bitmap details. - * In case of no bitmaps, the function returns NULL and - * the @errp parameter is not set. - * When bitmap information can not be obtained, the function returns - * NULL and the @errp parameter is set. + * On success return true with bm_list set (probably to NULL, if no bitmap= s), + * on failure return false with errp set. */ -Qcow2BitmapInfoList *qcow2_get_bitmap_info_list(BlockDriverState *bs, - Error **errp) +bool qcow2_get_bitmap_info_list(BlockDriverState *bs, + Qcow2BitmapInfoList **info_list, Error **e= rrp) { BDRVQcow2State *s =3D bs->opaque; Qcow2BitmapList *bm_list; Qcow2Bitmap *bm; - Qcow2BitmapInfoList *list =3D NULL; - Qcow2BitmapInfoList **plist =3D &list; =20 if (s->nb_bitmaps =3D=3D 0) { - return NULL; + *info_list =3D NULL; + return true; } =20 bm_list =3D bitmap_list_load(bs, s->bitmap_directory_offset, s->bitmap_directory_size, errp); - if (bm_list =3D=3D NULL) { - return NULL; + if (!bm_list) { + return false; } =20 + *info_list =3D NULL; + QSIMPLEQ_FOREACH(bm, bm_list, entry) { Qcow2BitmapInfo *info =3D g_new0(Qcow2BitmapInfo, 1); Qcow2BitmapInfoList *obj =3D g_new0(Qcow2BitmapInfoList, 1); @@ -1121,13 +1120,13 @@ Qcow2BitmapInfoList *qcow2_get_bitmap_info_list(Blo= ckDriverState *bs, info->name =3D g_strdup(bm->name); info->flags =3D get_bitmap_info_flags(bm->flags & ~BME_RESERVED_FL= AGS); obj->value =3D info; - *plist =3D obj; - plist =3D &obj->next; + *info_list =3D obj; + info_list =3D &obj->next; } =20 bitmap_list_free(bm_list); =20 - return list; + return true; } =20 int qcow2_reopen_bitmaps_rw(BlockDriverState *bs, Error **errp) diff --git a/block/qcow2.c b/block/qcow2.c index 10175fa399..eb7c82120c 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -5056,12 +5056,10 @@ static ImageInfoSpecific *qcow2_get_specific_info(B= lockDriverState *bs, BDRVQcow2State *s =3D bs->opaque; ImageInfoSpecific *spec_info; QCryptoBlockInfo *encrypt_info =3D NULL; - Error *local_err =3D NULL; =20 if (s->crypto !=3D NULL) { - encrypt_info =3D qcrypto_block_get_info(s->crypto, &local_err); - if (local_err) { - error_propagate(errp, local_err); + encrypt_info =3D qcrypto_block_get_info(s->crypto, errp); + if (!encrypt_info) { return NULL; } } @@ -5078,9 +5076,7 @@ static ImageInfoSpecific *qcow2_get_specific_info(Blo= ckDriverState *bs, }; } else if (s->qcow_version =3D=3D 3) { Qcow2BitmapInfoList *bitmaps; - bitmaps =3D qcow2_get_bitmap_info_list(bs, &local_err); - if (local_err) { - error_propagate(errp, local_err); + if (!qcow2_get_bitmap_info_list(bs, &bitmaps, errp)) { qapi_free_ImageInfoSpecific(spec_info); qapi_free_QCryptoBlockInfo(encrypt_info); return NULL; --=20 2.21.3 From nobody Sun May 5 02:41:46 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; 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dkim=none (message not signed) header.d=none;nongnu.org; dmarc=none action=none header.from=virtuozzo.com; From: Vladimir Sementsov-Ogievskiy To: qemu-block@nongnu.org Cc: qemu-devel@nongnu.org, armbru@redhat.com, berto@igalia.com, vsementsov@virtuozzo.com, eblake@redhat.com, jsnow@redhat.com, stefanha@redhat.com, pbonzini@redhat.com, pavel.dovgaluk@ispras.ru, ari@tuxera.com, mreitz@redhat.com, kwolf@redhat.com, groug@kaod.org Subject: [PATCH 10/14] block/qcow2-bitmap: improve qcow2_load_dirty_bitmaps() interface Date: Wed, 9 Sep 2020 21:59:26 +0300 Message-Id: <20200909185930.26524-11-vsementsov@virtuozzo.com> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20200909185930.26524-1-vsementsov@virtuozzo.com> References: <20200909185930.26524-1-vsementsov@virtuozzo.com> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: AM3PR07CA0054.eurprd07.prod.outlook.com (2603:10a6:207:4::12) To AM7PR08MB5494.eurprd08.prod.outlook.com (2603:10a6:20b:dc::15) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-Mailer: git-send-email 2.21.3 X-Originating-IP: [185.215.60.136] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: dc078539-b22a-40fb-c764-08d854f28e06 X-MS-TrafficTypeDiagnostic: AM6PR08MB4070: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:949; 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charset="utf-8" It's recommended for bool functions with errp to return true on success and false on failure. Non-standard interfaces don't help to understand the code. The change is also needed to reduce error propagation. Signed-off-by: Vladimir Sementsov-Ogievskiy --- block/qcow2.h | 3 ++- block/qcow2-bitmap.c | 22 +++++++++------------- block/qcow2.c | 6 ++---- 3 files changed, 13 insertions(+), 18 deletions(-) diff --git a/block/qcow2.h b/block/qcow2.h index ac6a2d3e2a..e7e662533b 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -966,7 +966,8 @@ void qcow2_cache_discard(Qcow2Cache *c, void *table); int qcow2_check_bitmaps_refcounts(BlockDriverState *bs, BdrvCheckResult *r= es, void **refcount_table, int64_t *refcount_table_size); -bool qcow2_load_dirty_bitmaps(BlockDriverState *bs, Error **errp); +bool qcow2_load_dirty_bitmaps(BlockDriverState *bs, bool *header_updated, + Error **errp); bool qcow2_get_bitmap_info_list(BlockDriverState *bs, Qcow2BitmapInfoList **info_list, Error **e= rrp); int qcow2_reopen_bitmaps_rw(BlockDriverState *bs, Error **errp); diff --git a/block/qcow2-bitmap.c b/block/qcow2-bitmap.c index 9b14c0791f..f58923fce3 100644 --- a/block/qcow2-bitmap.c +++ b/block/qcow2-bitmap.c @@ -959,30 +959,24 @@ static void set_readonly_helper(gpointer bitmap, gpoi= nter value) bdrv_dirty_bitmap_set_readonly(bitmap, (bool)value); } =20 -/* qcow2_load_dirty_bitmaps() - * Return value is a hint for caller: true means that the Qcow2 header was - * updated. (false doesn't mean that the header should be updated by the - * caller, it just means that updating was not needed or the image cannot = be - * written to). - * On failure the function returns false. - */ -bool qcow2_load_dirty_bitmaps(BlockDriverState *bs, Error **errp) +/* Return true on success, false on failure. */ +bool qcow2_load_dirty_bitmaps(BlockDriverState *bs, bool *header_updated, + Error **errp) { BDRVQcow2State *s =3D bs->opaque; Qcow2BitmapList *bm_list; Qcow2Bitmap *bm; GSList *created_dirty_bitmaps =3D NULL; - bool header_updated =3D false; bool needs_update =3D false; =20 if (s->nb_bitmaps =3D=3D 0) { /* No bitmaps - nothing to do */ - return false; + return true; } =20 bm_list =3D bitmap_list_load(bs, s->bitmap_directory_offset, s->bitmap_directory_size, errp); - if (bm_list =3D=3D NULL) { + if (!bm_list) { return false; } =20 @@ -1033,7 +1027,9 @@ bool qcow2_load_dirty_bitmaps(BlockDriverState *bs, E= rror **errp) error_setg_errno(errp, -ret, "Can't update bitmap directory"); goto fail; } - header_updated =3D true; + if (header_updated) { + *header_updated =3D true; + } } =20 if (!can_write(bs)) { @@ -1044,7 +1040,7 @@ bool qcow2_load_dirty_bitmaps(BlockDriverState *bs, E= rror **errp) g_slist_free(created_dirty_bitmaps); bitmap_list_free(bm_list); =20 - return header_updated; + return true; =20 fail: g_slist_foreach(created_dirty_bitmaps, release_dirty_bitmap_helper, bs= ); diff --git a/block/qcow2.c b/block/qcow2.c index eb7c82120c..c2cd9434cc 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -1297,7 +1297,6 @@ static int coroutine_fn qcow2_do_open(BlockDriverStat= e *bs, QDict *options, unsigned int len, i; int ret =3D 0; QCowHeader header; - Error *local_err =3D NULL; uint64_t ext_end; uint64_t l1_vm_state_index; bool update_header =3D false; @@ -1786,9 +1785,8 @@ static int coroutine_fn qcow2_do_open(BlockDriverStat= e *bs, QDict *options, =20 if (!(bdrv_get_flags(bs) & BDRV_O_INACTIVE)) { /* It's case 1, 2 or 3.2. Or 3.1 which is BUG in management layer.= */ - bool header_updated =3D qcow2_load_dirty_bitmaps(bs, &local_err); - if (local_err !=3D NULL) { - error_propagate(errp, local_err); + bool header_updated; + if (!qcow2_load_dirty_bitmaps(bs, &header_updated, errp)) { ret =3D -EINVAL; goto fail; } --=20 2.21.3 From nobody Sun May 5 02:41:46 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; arc=pass (i=1dmarc=pass fromdomain=virtuozzo.com); dmarc=pass(p=quarantine dis=none) header.from=virtuozzo.com ARC-Seal: i=2; a=rsa-sha256; t=1599678374; cv=pass; d=zohomail.com; s=zohoarc; b=j8b0acPKA5Tz/lzq1Kli4zDdXITWwVFmLoeyZ97x5fdopSpn/c73rPX24nGtLVD9dn1XjuVMZFT6zzbA0d0+fnmV5vpuWjmmODTAIQTsyZ1Dc1KK6XFgTTyJHiOUnd2gfPzwseA11FfxsEIRCOAhXWK+F93+N/n1ctrSw/mHhMA= ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; 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charset="utf-8" It's better to return status together with setting errp. It makes possible to avoid error propagation. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Greg Kurz --- block/qcow2.h | 2 +- block/qcow2-bitmap.c | 13 ++++++------- 2 files changed, 7 insertions(+), 8 deletions(-) diff --git a/block/qcow2.h b/block/qcow2.h index e7e662533b..49824be5c6 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -972,7 +972,7 @@ bool qcow2_get_bitmap_info_list(BlockDriverState *bs, Qcow2BitmapInfoList **info_list, Error **e= rrp); int qcow2_reopen_bitmaps_rw(BlockDriverState *bs, Error **errp); int qcow2_truncate_bitmaps_check(BlockDriverState *bs, Error **errp); -void qcow2_store_persistent_dirty_bitmaps(BlockDriverState *bs, +bool qcow2_store_persistent_dirty_bitmaps(BlockDriverState *bs, bool release_stored, Error **err= p); int qcow2_reopen_bitmaps_ro(BlockDriverState *bs, Error **errp); bool qcow2_co_can_store_new_dirty_bitmap(BlockDriverState *bs, diff --git a/block/qcow2-bitmap.c b/block/qcow2-bitmap.c index f58923fce3..5eeff1cb1c 100644 --- a/block/qcow2-bitmap.c +++ b/block/qcow2-bitmap.c @@ -1524,9 +1524,10 @@ out: * readonly to begin with, and whether we opened directly or reopened to t= hat * state shouldn't matter for the state we get afterward. */ -void qcow2_store_persistent_dirty_bitmaps(BlockDriverState *bs, +bool qcow2_store_persistent_dirty_bitmaps(BlockDriverState *bs, bool release_stored, Error **err= p) { + ERRP_GUARD(); BdrvDirtyBitmap *bitmap; BDRVQcow2State *s =3D bs->opaque; uint32_t new_nb_bitmaps =3D s->nb_bitmaps; @@ -1546,7 +1547,7 @@ void qcow2_store_persistent_dirty_bitmaps(BlockDriver= State *bs, bm_list =3D bitmap_list_load(bs, s->bitmap_directory_offset, s->bitmap_directory_size, errp); if (bm_list =3D=3D NULL) { - return; + return false; } } =20 @@ -1661,7 +1662,7 @@ success: } =20 bitmap_list_free(bm_list); - return; + return true; =20 fail: QSIMPLEQ_FOREACH(bm, bm_list, entry) { @@ -1679,16 +1680,14 @@ fail: } =20 bitmap_list_free(bm_list); + return false; } =20 int qcow2_reopen_bitmaps_ro(BlockDriverState *bs, Error **errp) { BdrvDirtyBitmap *bitmap; - Error *local_err =3D NULL; =20 - qcow2_store_persistent_dirty_bitmaps(bs, false, &local_err); - if (local_err !=3D NULL) { - error_propagate(errp, local_err); + if (!qcow2_store_persistent_dirty_bitmaps(bs, false, errp)) { return -EINVAL; } =20 --=20 2.21.3 From nobody Sun May 5 02:41:46 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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dkim=none (message not signed) header.d=none;nongnu.org; dmarc=none action=none header.from=virtuozzo.com; From: Vladimir Sementsov-Ogievskiy To: qemu-block@nongnu.org Cc: qemu-devel@nongnu.org, armbru@redhat.com, berto@igalia.com, vsementsov@virtuozzo.com, eblake@redhat.com, jsnow@redhat.com, stefanha@redhat.com, pbonzini@redhat.com, pavel.dovgaluk@ispras.ru, ari@tuxera.com, mreitz@redhat.com, kwolf@redhat.com, groug@kaod.org Subject: [PATCH 12/14] block/qcow2: read_cache_sizes: return status value Date: Wed, 9 Sep 2020 21:59:28 +0300 Message-Id: <20200909185930.26524-13-vsementsov@virtuozzo.com> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20200909185930.26524-1-vsementsov@virtuozzo.com> References: <20200909185930.26524-1-vsementsov@virtuozzo.com> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: AM3PR07CA0054.eurprd07.prod.outlook.com (2603:10a6:207:4::12) To AM7PR08MB5494.eurprd08.prod.outlook.com (2603:10a6:20b:dc::15) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-Mailer: git-send-email 2.21.3 X-Originating-IP: [185.215.60.136] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 033bc96c-50c3-45b4-c3b5-08d854f28f55 X-MS-TrafficTypeDiagnostic: AM6PR08MB4070: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:3826; 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charset="utf-8" It's better to return status together with setting errp. It allows to reduce error propagation. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Alberto Garcia Reviewed-by: Greg Kurz --- block/qcow2.c | 19 +++++++++---------- 1 file changed, 9 insertions(+), 10 deletions(-) diff --git a/block/qcow2.c b/block/qcow2.c index c2cd9434cc..31dd28d19e 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -869,7 +869,7 @@ static void qcow2_attach_aio_context(BlockDriverState *= bs, cache_clean_timer_init(bs, new_context); } =20 -static void read_cache_sizes(BlockDriverState *bs, QemuOpts *opts, +static bool read_cache_sizes(BlockDriverState *bs, QemuOpts *opts, uint64_t *l2_cache_size, uint64_t *l2_cache_entry_size, uint64_t *refcount_cache_size, Error **errp) @@ -907,16 +907,16 @@ static void read_cache_sizes(BlockDriverState *bs, Qe= muOpts *opts, error_setg(errp, QCOW2_OPT_CACHE_SIZE ", " QCOW2_OPT_L2_CACHE_= SIZE " and " QCOW2_OPT_REFCOUNT_CACHE_SIZE " may not be = set " "at the same time"); - return; + return false; } else if (l2_cache_size_set && (l2_cache_max_setting > combined_cache_size)) { error_setg(errp, QCOW2_OPT_L2_CACHE_SIZE " may not exceed " QCOW2_OPT_CACHE_SIZE); - return; + return false; } else if (*refcount_cache_size > combined_cache_size) { error_setg(errp, QCOW2_OPT_REFCOUNT_CACHE_SIZE " may not excee= d " QCOW2_OPT_CACHE_SIZE); - return; + return false; } =20 if (l2_cache_size_set) { @@ -955,8 +955,10 @@ static void read_cache_sizes(BlockDriverState *bs, Qem= uOpts *opts, error_setg(errp, "L2 cache entry size must be a power of two " "between %d and the cluster size (%d)", 1 << MIN_CLUSTER_BITS, s->cluster_size); - return; + return false; } + + return true; } =20 typedef struct Qcow2ReopenState { @@ -983,7 +985,6 @@ static int qcow2_update_options_prepare(BlockDriverStat= e *bs, int i; const char *encryptfmt; QDict *encryptopts =3D NULL; - Error *local_err =3D NULL; int ret; =20 qdict_extract_subqdict(options, &encryptopts, "encrypt."); @@ -996,10 +997,8 @@ static int qcow2_update_options_prepare(BlockDriverSta= te *bs, } =20 /* get L2 table/refcount block cache size from command line options */ - read_cache_sizes(bs, opts, &l2_cache_size, &l2_cache_entry_size, - &refcount_cache_size, &local_err); - if (local_err) { - error_propagate(errp, local_err); + if (!read_cache_sizes(bs, opts, &l2_cache_size, &l2_cache_entry_size, + &refcount_cache_size, errp)) { ret =3D -EINVAL; goto fail; } --=20 2.21.3 From nobody Sun May 5 02:41:46 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; arc=pass (i=1dmarc=pass fromdomain=virtuozzo.com); dmarc=pass(p=quarantine dis=none) header.from=virtuozzo.com ARC-Seal: i=2; a=rsa-sha256; t=1599678473; cv=pass; d=zohomail.com; s=zohoarc; b=Tgu9tkvvaIdaWSSIhPtctUilejlrw2e/Jgm/qVfV2yCaQMQte2AHdMXsqRLXEFyFOpVHA5BK1emtJMn2lMO6ak3vjfj3pUz0ZIF4IeUHyjjE3vx/d2N7YhMqwuWzDd9nFWCJ547L/cBlPauQeSfa7v0IcWgAjwvjJVN5fAbW8Kg= ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1599678473; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; 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charset="utf-8" 1. Drop extra error propagation 2. Set errp always on failure. Generic bdrv_open_driver supports driver functions which can return negative value and forget to set errp. That's a strange thing.. Let's improve qcow2_do_open to not behave this way. This allows to simplify code in qcow2_co_invalidate_cache(). Signed-off-by: Vladimir Sementsov-Ogievskiy --- block/qcow2.c | 16 +++++++--------- 1 file changed, 7 insertions(+), 9 deletions(-) diff --git a/block/qcow2.c b/block/qcow2.c index 31dd28d19e..cc4e7dd461 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -1292,6 +1292,7 @@ static int validate_compression_type(BDRVQcow2State *= s, Error **errp) static int coroutine_fn qcow2_do_open(BlockDriverState *bs, QDict *options, int flags, Error **errp) { + ERRP_GUARD(); BDRVQcow2State *s =3D bs->opaque; unsigned int len, i; int ret =3D 0; @@ -1426,6 +1427,8 @@ static int coroutine_fn qcow2_do_open(BlockDriverStat= e *bs, QDict *options, report_unsupported_feature(errp, feature_table, s->incompatible_features & ~QCOW2_INCOMPAT_MASK); + error_setg(errp, + "qcow2 header contains unknown incompatible_feature bit= s"); ret =3D -ENOTSUP; g_free(feature_table); goto fail; @@ -2709,11 +2712,11 @@ static void qcow2_close(BlockDriverState *bs) static void coroutine_fn qcow2_co_invalidate_cache(BlockDriverState *bs, Error **errp) { + ERRP_GUARD(); BDRVQcow2State *s =3D bs->opaque; int flags =3D s->flags; QCryptoBlock *crypto =3D NULL; QDict *options; - Error *local_err =3D NULL; int ret; =20 /* @@ -2731,16 +2734,11 @@ static void coroutine_fn qcow2_co_invalidate_cache(= BlockDriverState *bs, =20 flags &=3D ~BDRV_O_INACTIVE; qemu_co_mutex_lock(&s->lock); - ret =3D qcow2_do_open(bs, options, flags, &local_err); + ret =3D qcow2_do_open(bs, options, flags, errp); qemu_co_mutex_unlock(&s->lock); qobject_unref(options); - if (local_err) { - error_propagate_prepend(errp, local_err, - "Could not reopen qcow2 layer: "); - bs->drv =3D NULL; - return; - } else if (ret < 0) { - error_setg_errno(errp, -ret, "Could not reopen qcow2 layer"); + if (ret < 0) { + error_prepend(errp, "Could not reopen qcow2 layer: "); bs->drv =3D NULL; return; } --=20 2.21.3 From nobody Sun May 5 02:41:46 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; 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dkim=none (message not signed) header.d=none;nongnu.org; dmarc=none action=none header.from=virtuozzo.com; From: Vladimir Sementsov-Ogievskiy To: qemu-block@nongnu.org Cc: qemu-devel@nongnu.org, armbru@redhat.com, berto@igalia.com, vsementsov@virtuozzo.com, eblake@redhat.com, jsnow@redhat.com, stefanha@redhat.com, pbonzini@redhat.com, pavel.dovgaluk@ispras.ru, ari@tuxera.com, mreitz@redhat.com, kwolf@redhat.com, groug@kaod.org Subject: [PATCH 14/14] block/qed: bdrv_qed_do_open: deal with errp Date: Wed, 9 Sep 2020 21:59:30 +0300 Message-Id: <20200909185930.26524-15-vsementsov@virtuozzo.com> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20200909185930.26524-1-vsementsov@virtuozzo.com> References: <20200909185930.26524-1-vsementsov@virtuozzo.com> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: AM3PR07CA0054.eurprd07.prod.outlook.com (2603:10a6:207:4::12) To AM7PR08MB5494.eurprd08.prod.outlook.com (2603:10a6:20b:dc::15) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-Mailer: git-send-email 2.21.3 X-Originating-IP: [185.215.60.136] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 15dd97a0-b510-44d7-113c-08d854f290aa X-MS-TrafficTypeDiagnostic: AM6PR08MB4070: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:826; 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charset="utf-8" Set errp always on failure. Generic bdrv_open_driver supports driver functions which can return negative value and forget to set errp. That's a strange thing.. Let's improve bdrv_qed_do_open to not behave this way. This allows to simplify code in bdrv_qed_co_invalidate_cache(). Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Alberto Garcia --- block/qed.c | 24 +++++++++++++++--------- 1 file changed, 15 insertions(+), 9 deletions(-) diff --git a/block/qed.c b/block/qed.c index b27e7546ca..f45c640513 100644 --- a/block/qed.c +++ b/block/qed.c @@ -393,6 +393,7 @@ static int coroutine_fn bdrv_qed_do_open(BlockDriverSta= te *bs, QDict *options, =20 ret =3D bdrv_pread(bs->file, 0, &le_header, sizeof(le_header)); if (ret < 0) { + error_setg(errp, "Failed to read QED header"); return ret; } qed_header_le_to_cpu(&le_header, &s->header); @@ -408,25 +409,30 @@ static int coroutine_fn bdrv_qed_do_open(BlockDriverS= tate *bs, QDict *options, return -ENOTSUP; } if (!qed_is_cluster_size_valid(s->header.cluster_size)) { + error_setg(errp, "QED cluster size is invalid"); return -EINVAL; } =20 /* Round down file size to the last cluster */ file_size =3D bdrv_getlength(bs->file->bs); if (file_size < 0) { + error_setg(errp, "Failed to get file length"); return file_size; } s->file_size =3D qed_start_of_cluster(s, file_size); =20 if (!qed_is_table_size_valid(s->header.table_size)) { + error_setg(errp, "QED table size is invalid"); return -EINVAL; } if (!qed_is_image_size_valid(s->header.image_size, s->header.cluster_size, s->header.table_size)) { + error_setg(errp, "QED image size is invalid"); return -EINVAL; } if (!qed_check_table_offset(s, s->header.l1_table_offset)) { + error_setg(errp, "QED table offset is invalid"); return -EINVAL; } =20 @@ -438,6 +444,7 @@ static int coroutine_fn bdrv_qed_do_open(BlockDriverSta= te *bs, QDict *options, =20 /* Header size calculation must not overflow uint32_t */ if (s->header.header_size > UINT32_MAX / s->header.cluster_size) { + error_setg(errp, "QED header size is too large"); return -EINVAL; } =20 @@ -445,6 +452,7 @@ static int coroutine_fn bdrv_qed_do_open(BlockDriverSta= te *bs, QDict *options, if ((uint64_t)s->header.backing_filename_offset + s->header.backing_filename_size > s->header.cluster_size * s->header.header_size) { + error_setg(errp, "QED backing filename offset is invalid"); return -EINVAL; } =20 @@ -453,6 +461,7 @@ static int coroutine_fn bdrv_qed_do_open(BlockDriverSta= te *bs, QDict *options, bs->auto_backing_file, sizeof(bs->auto_backing_file)); if (ret < 0) { + error_setg(errp, "Failed to read backing filename"); return ret; } pstrcpy(bs->backing_file, sizeof(bs->backing_file), @@ -475,6 +484,7 @@ static int coroutine_fn bdrv_qed_do_open(BlockDriverSta= te *bs, QDict *options, =20 ret =3D qed_write_header_sync(s); if (ret) { + error_setg(errp, "Failed to update header"); return ret; } =20 @@ -487,6 +497,7 @@ static int coroutine_fn bdrv_qed_do_open(BlockDriverSta= te *bs, QDict *options, =20 ret =3D qed_read_l1_table_sync(s); if (ret) { + error_setg(errp, "Failed to read L1 table"); goto out; } =20 @@ -503,6 +514,7 @@ static int coroutine_fn bdrv_qed_do_open(BlockDriverSta= te *bs, QDict *options, =20 ret =3D qed_check(s, &result, true); if (ret) { + error_setg(errp, "Image corrupted"); goto out; } } @@ -1537,22 +1549,16 @@ static void coroutine_fn bdrv_qed_co_invalidate_cac= he(BlockDriverState *bs, Error **errp) { BDRVQEDState *s =3D bs->opaque; - Error *local_err =3D NULL; int ret; =20 bdrv_qed_close(bs); =20 bdrv_qed_init_state(bs); qemu_co_mutex_lock(&s->table_lock); - ret =3D bdrv_qed_do_open(bs, NULL, bs->open_flags, &local_err); + ret =3D bdrv_qed_do_open(bs, NULL, bs->open_flags, errp); qemu_co_mutex_unlock(&s->table_lock); - if (local_err) { - error_propagate_prepend(errp, local_err, - "Could not reopen qed layer: "); - return; - } else if (ret < 0) { - error_setg_errno(errp, -ret, "Could not reopen qed layer"); - return; + if (ret < 0) { + error_prepend(errp, "Could not reopen qed layer: "); } } =20 --=20 2.21.3