Now bdrv_append returns status and we can drop all the local_err things
around it.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
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(BlockDriverState *bs,
int64_t total_size;
QemuOpts *opts = NULL;
BlockDriverState *bs_snapshot = NULL;
- Error *local_err = NULL;
int ret;
/* if snapshot, we create a temporary backing file and open it
@@ -3203,9 +3202,7 @@ static BlockDriverState *bdrv_append_temp_snapshot(BlockDriverState *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 = 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(BlockDriverState *source,
BlockCopyState **bcs,
Error **errp)
{
- Error *local_err = NULL;
+ ERRP_GUARD();
BDRVBackupTopState *state;
BlockDriverState *top;
bool appended = false;
@@ -225,9 +225,8 @@ BlockDriverState *bdrv_backup_top_append(BlockDriverState *source,
bdrv_drained_begin(source);
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 = true;
@@ -237,18 +236,16 @@ BlockDriverState *bdrv_backup_top_append(BlockDriverState *source,
* we want.
*/
state->active = 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;
}
state->cluster_size = cluster_size;
state->bcs = block_copy_state_new(top->backing, state->target,
- cluster_size, write_flags, &local_err);
- 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 = state->bcs;
@@ -266,7 +263,6 @@ fail:
}
bdrv_drained_end(source);
- error_propagate(errp, local_err);
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 = NULL;
- Error *local_err = NULL;
int ret;
assert(top != bs);
@@ -292,10 +291,8 @@ void commit_start(const char *job_id, BlockDriverState *bs,
commit_top_bs->total_sectors = top->total_sectors;
- bdrv_append(commit_top_bs, top, &local_err);
- if (local_err) {
+ if (bdrv_append(commit_top_bs, top, errp) < 0) {
commit_top_bs = NULL;
- error_propagate(errp, local_err);
goto fail;
}
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 = NULL;
int ret;
if (granularity == 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 = bdrv_append(mirror_top_bs, bs, errp);
bdrv_drained_end(bs);
- if (local_err) {
+ if (ret < 0) {
bdrv_unref(mirror_top_bs);
- error_propagate(errp, local_err);
return NULL;
}
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 = 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 = NULL;
+ int ret;
BlockBackend *root = 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_abort);
- bdrv_append(filter, bs, &local_err);
- error_free_or_abort(&local_err);
+ ret = bdrv_append(filter, bs, NULL);
+ assert(ret < 0);
blk_unref(root);
}
--
2.21.3
On Wed, 9 Sep 2020 21:59:18 +0300
Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> wrote:
> Now bdrv_append returns status and we can drop all the local_err things
> around it.
>
> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
> ---
Reviewed-by: Greg Kurz <groug@kaod.org>
Just one suggestion for a follow-up below...
> 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(BlockDriverState *bs,
> int64_t total_size;
> QemuOpts *opts = NULL;
> BlockDriverState *bs_snapshot = NULL;
> - Error *local_err = NULL;
> int ret;
>
> /* if snapshot, we create a temporary backing file and open it
> @@ -3203,9 +3202,7 @@ static BlockDriverState *bdrv_append_temp_snapshot(BlockDriverState *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 = 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(BlockDriverState *source,
> BlockCopyState **bcs,
> Error **errp)
> {
> - Error *local_err = NULL;
> + ERRP_GUARD();
> BDRVBackupTopState *state;
> BlockDriverState *top;
> bool appended = false;
> @@ -225,9 +225,8 @@ BlockDriverState *bdrv_backup_top_append(BlockDriverState *source,
> bdrv_drained_begin(source);
>
> 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 = true;
> @@ -237,18 +236,16 @@ BlockDriverState *bdrv_backup_top_append(BlockDriverState *source,
> * we want.
> */
> state->active = 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;
> }
>
> state->cluster_size = cluster_size;
> state->bcs = block_copy_state_new(top->backing, state->target,
> - cluster_size, write_flags, &local_err);
> - 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 = state->bcs;
> @@ -266,7 +263,6 @@ fail:
> }
>
> bdrv_drained_end(source);
> - error_propagate(errp, local_err);
>
> 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 = NULL;
> - Error *local_err = NULL;
> int ret;
>
... this is unrelated but while reviewing I've noticed that the ret
variable isn't really needed.
> assert(top != bs);
> @@ -292,10 +291,8 @@ void commit_start(const char *job_id, BlockDriverState *bs,
>
> commit_top_bs->total_sectors = top->total_sectors;
>
> - bdrv_append(commit_top_bs, top, &local_err);
> - if (local_err) {
> + if (bdrv_append(commit_top_bs, top, errp) < 0) {
> commit_top_bs = NULL;
> - error_propagate(errp, local_err);
> goto fail;
> }
>
> 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 = NULL;
> int ret;
>
> if (granularity == 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 = bdrv_append(mirror_top_bs, bs, errp);
> bdrv_drained_end(bs);
>
> - if (local_err) {
> + if (ret < 0) {
> bdrv_unref(mirror_top_bs);
> - error_propagate(errp, local_err);
> return NULL;
> }
>
> 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 = 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 = NULL;
> + int ret;
>
> BlockBackend *root = 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_abort);
>
> - bdrv_append(filter, bs, &local_err);
> - error_free_or_abort(&local_err);
> + ret = bdrv_append(filter, bs, NULL);
> + assert(ret < 0);
>
> blk_unref(root);
> }
10.09.2020 19:10, Greg Kurz wrote: > On Wed, 9 Sep 2020 21:59:18 +0300 > Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> wrote: > >> Now bdrv_append returns status and we can drop all the local_err things >> around it. >> >> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> >> --- > > Reviewed-by: Greg Kurz <groug@kaod.org> > > Just one suggestion for a follow-up below... > >> block.c | 5 +---- >> block/backup-top.c | 20 ++++++++------------ [..] >> @@ -253,7 +253,6 @@ void commit_start(const char *job_id, BlockDriverState *bs, >> CommitBlockJob *s; >> BlockDriverState *iter; >> BlockDriverState *commit_top_bs = NULL; >> - Error *local_err = NULL; >> int ret; >> > > ... this is unrelated but while reviewing I've noticed that the ret > variable isn't really needed. > Looking at this now, I'm not quite agreed. I think that avoiding multi-line if conditions is a good reason for additional variables, like this ret. A kind of taste of course, so if you want you may post a patch, but I don't want do it :) -- Best regards, Vladimir
On Wed 09 Sep 2020 08:59:18 PM CEST, Vladimir Sementsov-Ogievskiy wrote: > Now bdrv_append returns status and we can drop all the local_err things > around it. > > Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Berto
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