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From e32c0091dd23e91cdaa64929e417fa86770849b8 Mon Sep 17 00:00:00 2001
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Message-Id: <e32c0091dd23e91cdaa64929e417fa86770849b8@dist-git>
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From: Jiri Denemark <jdenemar@redhat.com>
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Date: Mon, 18 Jul 2016 13:17:28 +0200
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Subject: [PATCH] qemu: Fix migration from old libvirt
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Older libvirt versions send persistent XML in a migration cookie even
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when VIR_MIGRATE_PERSIST_DEST flag is not used, but current libvirt
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properly fails if the cookie contains unexpected flags. Thus migration
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from old libvirt fails with
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    internal error: Unsupported migration cookie feature persistent
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unless VIR_MIGRATE_PERSIST_DEST flag is set.
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https://bugzilla.redhat.com/show_bug.cgi?id=1320500
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Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
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(cherry picked from commit 338f772e923ce07148abe6dcaf3d62b744e7baf5)
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Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
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---
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 src/qemu/qemu_migration.c | 5 +++--
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 1 file changed, 3 insertions(+), 2 deletions(-)
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diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c
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index 0b1770b..463e624 100644
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--- a/src/qemu/qemu_migration.c
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+++ b/src/qemu/qemu_migration.c
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@@ -6183,8 +6183,9 @@ qemuMigrationFinish(virQEMUDriverPtr driver,
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     cookie_flags = QEMU_MIGRATION_COOKIE_NETWORK |
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                    QEMU_MIGRATION_COOKIE_STATS |
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                    QEMU_MIGRATION_COOKIE_NBD;
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-    if (flags & VIR_MIGRATE_PERSIST_DEST)
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-        cookie_flags |= QEMU_MIGRATION_COOKIE_PERSISTENT;
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+    /* Some older versions of libvirt always send persistent XML in the cookie
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+     * even though VIR_MIGRATE_PERSIST_DEST was not used. */
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+    cookie_flags |= QEMU_MIGRATION_COOKIE_PERSISTENT;
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     if (!(mig = qemuMigrationEatCookie(driver, vm, cookiein,
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                                        cookieinlen, cookie_flags)))
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-- 
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2.9.2
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