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From 32f7f67152cf7ffe36917a2c436eb89871dcee92 Mon Sep 17 00:00:00 2001
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From: Kevin Wolf <kwolf@redhat.com>
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Date: Mon, 4 Dec 2017 12:10:04 +0100
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Subject: [PATCH 33/36] block: reopen: Queue children after their parents
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RH-Author: Kevin Wolf <kwolf@redhat.com>
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Message-id: <20171204121007.12964-6-kwolf@redhat.com>
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Patchwork-id: 78107
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O-Subject: [RHV-7.5 qemu-kvm-rhev PATCH v2 5/8] block: reopen: Queue children after their parents
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Bugzilla: 1492178
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RH-Acked-by: Fam Zheng <famz@redhat.com>
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RH-Acked-by: Max Reitz <mreitz@redhat.com>
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RH-Acked-by: Jeffrey Cody <jcody@redhat.com>
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We will calculate the required new permissions in the prepare stage of a
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reopen. Required permissions of children can be influenced by the
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changes made to their parents, but parents are independent from their
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children. This means that permissions need to be calculated top-down. In
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order to achieve this, queue parents before their children rather than
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queuing the children first.
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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Reviewed-by: Eric Blake <eblake@redhat.com>
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(cherry picked from commit 1857c97b76af02537b954c86dab066503950a4fd)
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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block.c | 26 +++++++++++++-------------
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1 file changed, 13 insertions(+), 13 deletions(-)
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diff --git a/block.c b/block.c
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index 5cce274..0a7e2c6 100644
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--- a/block.c
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+++ b/block.c
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@@ -2767,6 +2767,19 @@ static BlockReopenQueue *bdrv_reopen_queue_child(BlockReopenQueue *bs_queue,
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flags |= BDRV_O_ALLOW_RDWR;
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}
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+ if (!bs_entry) {
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+ bs_entry = g_new0(BlockReopenQueueEntry, 1);
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+ QSIMPLEQ_INSERT_TAIL(bs_queue, bs_entry, entry);
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+ } else {
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+ QDECREF(bs_entry->state.options);
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+ QDECREF(bs_entry->state.explicit_options);
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+ }
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+
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+ bs_entry->state.bs = bs;
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+ bs_entry->state.options = options;
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+ bs_entry->state.explicit_options = explicit_options;
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+ bs_entry->state.flags = flags;
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+
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QLIST_FOREACH(child, &bs->children, next) {
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QDict *new_child_options;
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char *child_key_dot;
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@@ -2786,19 +2799,6 @@ static BlockReopenQueue *bdrv_reopen_queue_child(BlockReopenQueue *bs_queue,
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child->role, options, flags);
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}
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- if (!bs_entry) {
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- bs_entry = g_new0(BlockReopenQueueEntry, 1);
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- QSIMPLEQ_INSERT_TAIL(bs_queue, bs_entry, entry);
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- } else {
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- QDECREF(bs_entry->state.options);
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- QDECREF(bs_entry->state.explicit_options);
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- }
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-
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- bs_entry->state.bs = bs;
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- bs_entry->state.options = options;
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- bs_entry->state.explicit_options = explicit_options;
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- bs_entry->state.flags = flags;
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-
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return bs_queue;
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}
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--
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1.8.3.1
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