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block/qcow2: simplify qcow2_co_invalidate_cache()

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qcow2_do_open correctly sets errp on each failure path. So, we can
simplify code in qcow2_co_invalidate_cache() and drop explicit error
propagation.

Add ERRP_GUARD() as mandated by the documentation in
include/qapi/error.h so that error_prepend() is actually called even if
errp is &error_fatal.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
Message-Id: <20210202124956.63146-13-vsementsov@virtuozzo.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2021-02-02 15:49:54 +03:00 committed by Eric Blake
parent 772c4cad13
commit e6247c9c9f
1 changed files with 4 additions and 9 deletions
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13
block/qcow2.c
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@ -2716,11 +2716,11 @@ static void qcow2_close(BlockDriverState *bs)
static void coroutine_fn qcow2_co_invalidate_cache(BlockDriverState *bs,
Error **errp)
{
ERRP_GUARD();
BDRVQcow2State *s = bs->opaque;
int flags = s->flags;
QCryptoBlock *crypto = NULL;
QDict *options;
Error *local_err = NULL;
int ret;
/*
@ -2738,16 +2738,11 @@ static void coroutine_fn qcow2_co_invalidate_cache(BlockDriverState *bs,
flags &= ~BDRV_O_INACTIVE;
qemu_co_mutex_lock(&s->lock);
ret = qcow2_do_open(bs, options, flags, &local_err);
ret = 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 = 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 = NULL;
return;
}