From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47916) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WGvyh-0008LO-8p for qemu-devel@nongnu.org; Fri, 21 Feb 2014 14:41:49 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WGvyb-0002OT-90 for qemu-devel@nongnu.org; Fri, 21 Feb 2014 14:41:43 -0500 Received: from mx1.redhat.com ([209.132.183.28]:37884) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WGvyb-0002OK-1C for qemu-devel@nongnu.org; Fri, 21 Feb 2014 14:41:37 -0500 From: Max Reitz Date: Fri, 21 Feb 2014 20:44:07 +0100 Message-Id: <1393011848-18742-2-git-send-email-mreitz@redhat.com> In-Reply-To: <1393011848-18742-1-git-send-email-mreitz@redhat.com> References: <1393011848-18742-1-git-send-email-mreitz@redhat.com> Subject: [Qemu-devel] [PATCH 1/2] quorum: Simplify quorum_open() List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Kevin Wolf , =?UTF-8?q?Beno=C3=AEt=20Canet?= , Stefan Hajnoczi , Max Reitz Although it may not look like it, this patch simplifies quorum_open(). qdict_array_split() is now able to return QLists with different objects than only QDicts, therefore it will now do all the work and quorum_open() does not have to handle reference strings by itself. This allows mixing full option dicts and reference strings for specifying the child block devices of quorum; furthermore, it improves handling of malformed specifications. Signed-off-by: Max Reitz --- block/quorum.c | 62 +++++++++++++++++++++++++++++++++++----------------------- 1 file changed, 38 insertions(+), 24 deletions(-) diff --git a/block/quorum.c b/block/quorum.c index 18721ba..8f5833d 100644 --- a/block/quorum.c +++ b/block/quorum.c @@ -720,7 +720,6 @@ static int quorum_open(BlockDriverState *bs, QDict *options, int flags, QDict *sub = NULL; QList *list = NULL; const QListEntry *lentry; - const QDictEntry *dentry; int i; int ret = 0; @@ -728,10 +727,17 @@ static int quorum_open(BlockDriverState *bs, QDict *options, int flags, qdict_extract_subqdict(options, &sub, "children."); qdict_array_split(sub, &list); + if (qdict_size(sub)) { + error_setg(&local_err, "Invalid option children.%s", + qdict_first(sub)->key); + ret = -EINVAL; + goto exit; + } + /* count how many different children are present and validate * qdict_size(sub) address the open by reference case */ - s->num_children = !qlist_size(list) ? qdict_size(sub) : qlist_size(list); + s->num_children = qlist_size(list); if (s->num_children < 2) { error_setg(&local_err, "Number of provided children must be greater than 1"); @@ -767,30 +773,38 @@ static int quorum_open(BlockDriverState *bs, QDict *options, int flags, s->bs = g_new0(BlockDriverState *, s->num_children); opened = g_new0(bool, s->num_children); - /* Open by file name or options dict (command line or QMP) */ - if (s->num_children == qlist_size(list)) { - for (i = 0, lentry = qlist_first(list); lentry; - lentry = qlist_next(lentry), i++) { - QDict *d = qobject_to_qdict(lentry->value); - QINCREF(d); - ret = bdrv_open(&s->bs[i], NULL, NULL, d, flags, NULL, &local_err); - if (ret < 0) { - goto close_exit; - } - opened[i] = true; + for (i = 0, lentry = qlist_first(list); lentry; + lentry = qlist_next(lentry), i++) { + QDict *d; + QString *string; + + switch (qobject_type(lentry->value)) + { + /* List of options */ + case QTYPE_QDICT: + d = qobject_to_qdict(lentry->value); + QINCREF(d); + ret = bdrv_open(&s->bs[i], NULL, NULL, d, flags, NULL, + &local_err); + break; + + /* QMP reference */ + case QTYPE_QSTRING: + string = qobject_to_qstring(lentry->value); + ret = bdrv_open(&s->bs[i], NULL, qstring_get_str(string), NULL, + flags, NULL, &local_err); + break; + + default: + error_setg(&local_err, "Specification of child block device %i " + "is invalid", i); + ret = -EINVAL; } - /* Open by QMP references */ - } else { - for (i = 0, dentry = qdict_first(sub); dentry; - dentry = qdict_next(sub, dentry), i++) { - QString *string = qobject_to_qstring(dentry->value); - ret = bdrv_open(&s->bs[i], NULL, qstring_get_str(string), NULL, - flags, NULL, &local_err); - if (ret < 0) { - goto close_exit; - } - opened[i] = true; + + if (ret < 0) { + goto close_exit; } + opened[i] = true; } g_free(opened); -- 1.9.0