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From 34f122742b3b75db66c9f2a022179136dbc534e4 Mon Sep 17 00:00:00 2001
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From: Orit Wasserman <owasserm@redhat.com>
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Date: Tue, 11 Feb 2014 15:20:47 +0100
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Subject: [PATCH 13/28] Add check for cache size smaller than page size
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RH-Author: Orit Wasserman <owasserm@redhat.com>
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Message-id: <1392132047-5103-1-git-send-email-owasserm@redhat.com>
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Patchwork-id: 57207
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O-Subject: [RHEL7 qemu-kvm PATCH] Add check for cache size smaller than page size
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Bugzilla: 1017096
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RH-Acked-by: Juan Quintela <quintela@redhat.com>
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RH-Acked-by: Dr. David Alan Gilbert (git) <dgilbert@redhat.com>
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RH-Acked-by: Markus Armbruster <armbru@redhat.com>
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Bugzilla: 1017096
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Upstream: merged
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Brew:http://brewweb.devel.redhat.com/brew/taskinfo?taskID=7028464
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Signed-off-by: Orit Wasserman <owasserm@redhat.com>
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Reviewed-by: Juan Quintela <quintela@redhat.com>
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Signed-off-by: Juan Quintela <quintela@redhat.com>
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(cherry picked from commit c91e681a558fc21073ffc491b5a022d5f340fa0b)
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---
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arch_init.c | 4 ++++
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migration.c | 10 +++++++++-
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2 files changed, 13 insertions(+), 1 deletion(-)
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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arch_init.c | 4 ++++
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migration.c | 10 +++++++++-
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2 files changed, 13 insertions(+), 1 deletions(-)
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diff --git a/arch_init.c b/arch_init.c
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index 31aac84..c3207bf 100644
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--- a/arch_init.c
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+++ b/arch_init.c
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@@ -178,6 +178,10 @@ static struct {
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int64_t xbzrle_cache_resize(int64_t new_size)
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{
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+ if (new_size < TARGET_PAGE_SIZE) {
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+ return -1;
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+ }
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+
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if (XBZRLE.cache != NULL) {
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return cache_resize(XBZRLE.cache, new_size / TARGET_PAGE_SIZE) *
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TARGET_PAGE_SIZE;
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diff --git a/migration.c b/migration.c
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index 21f7247..6487fe2 100644
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--- a/migration.c
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+++ b/migration.c
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@@ -474,6 +474,7 @@ void qmp_migrate_cancel(Error **errp)
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void qmp_migrate_set_cache_size(int64_t value, Error **errp)
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{
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MigrationState *s = migrate_get_current();
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+ int64_t new_size;
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/* Check for truncation */
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if (value != (size_t)value) {
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@@ -482,7 +483,14 @@ void qmp_migrate_set_cache_size(int64_t value, Error **errp)
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return;
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}
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- s->xbzrle_cache_size = xbzrle_cache_resize(value);
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+ new_size = xbzrle_cache_resize(value);
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+ if (new_size < 0) {
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+ error_set(errp, QERR_INVALID_PARAMETER_VALUE, "cache size",
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+ "is smaller than page size");
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+ return;
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+ }
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+
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+ s->xbzrle_cache_size = new_size;
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}
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int64_t qmp_query_migrate_cache_size(Error **errp)
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--
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1.7.1
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