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Fri, 15 May 2020 13:11:55 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=web.de; s=dbaedf251592; t=1589541115; bh=/BRR383xwz8e/cdtXOCGs/9bda64NE7CUbfcKKkSXtM=; h=X-UI-Sender-Class:Date:From:To:Cc:Subject:In-Reply-To:References; b=K6fFhFN8Asw3AJuU03sGHKyPqYXhFBF54uqC8Y33To6BJQW9aKfVITX7ri9z7/6TJ bZL3NGl+cdZcaswtBkMb37Jux3jZIJIncGcReB5boOlI7Dn+QNIVHomILfrBRMNtvi vtFDu8oX0v6AJUAfi6J0KbgGkxgfMhni2C2XIJS8= X-UI-Sender-Class: c548c8c5-30a9-4db5-a2e7-cb6cb037b8f9 Date: Fri, 15 May 2020 13:11:53 +0200 From: Lukas Straub To: qemu-devel Subject: [PATCH v5 5/6] net/colo-compare.c, softmmu/vl.c: Check that colo-compare is active Message-ID: In-Reply-To: References: MIME-Version: 1.0 Content-Type: multipart/signed; boundary="Sig_/tB//jzM3d.+_QoiJo3NznNz"; protocol="application/pgp-signature"; micalg=pgp-sha512 X-Provags-ID: V03:K1:zisGVcRHWVRf/jgsmBo3phHB4561wcsKRzPvPIek1z4aZ/W5q5G c+2lVHWMTMyaKNoa8sO3n3re/tYlnTH2EPvvc4Zp9vOS104+arD1ZEhPLWXbnN+zrpf5V6g vQIDHn5eQtBpJ1F3AAIy8vkQ2WCd2tayD31KOTLP6eRqfg53wi3swlruJpG6OtKi+Ovm2ef NMOGwN3EMb27LzydTtFMQ== X-UI-Out-Filterresults: notjunk:1;V03:K0:eBXHk8LzAHI=:4RuLsRscCmhekSUyogFh1o MduYPqZp/yd1PpDwN6P+Kmv4MAEGtbuE4nPL/LSh7z/ZlBZRzRoHvNLpl7r26slYjJHDQT/o0 ZCcj6jToD17pUbjxHBH2uP6ITLkdgskStElI2oSIqu8+IdX9UNnPvs/AntW/4AxFZRZI1HlyX k+z8VyyTPvRu87I53caNwIAITGas8k5CDVFASSsKTcJwytd4g7hoKvct5wHvgWy/8QUc45UVV 9j4U3uEmkw7yO2tjK6hMUGsZQLc3lVtBRmFFEVIuFxC6KEzJ6QbQ39Rxxa+YZwR1HROSyFZix 61GVYzOibSoq77wbtVcVXY0cuurwllqYN8bsSQxiDw1ZCpSG75Q5c0gS/hdAFPPmWieyypbM0 rUvEa9+greVAEQChp+vYfGlmbIuOYI7FNqzwUxtsPOgb7MABZPmBjxSERwWgvkQWW0D/QLhej DTRxj9u7l5/WmE44dkLMBtdyNg821tiU5eJTpxQIkqoXo4ZFj5i1pA/pI6o7dJr64jihESMbC +nZqVptIxz9LqAhUwGRFJHLIdPGfWHdMZYPUDYqysb2vXsyV1HKwBXrrS+w/iYR0Gg2cfsCMZ 9c/YJJU0Z2XJnjnjmQikIKCuJtJb69wIOHDBqWUz//lk5ZGHf4d3pm/AVeVG85VVzVwiDa28p 0ZwdvDsYfaUSEwTJa6JeZUKFxePw43aT1svvrOQyJZFLuRX2agQx2eOmoEsN/hxFK8+UTPxJB cPdNxSPggWDSvthSZ0x1Q4tfoWxiUvZiygK6wVBtKknyNI+VswCuq6Dgq79A+tXiypKfMf5ZF JIMFrkfJ4WHNRPwlZ3FokHmrfoRYnfSGJxkwPPyR3Nej3P3kOQ05xYoq1cGWGcprpBaioI42H 7S0qLZw/VXc88MpD85y/sx3rftTQ5iKr4ZL5sIe3IW4iVILHA8b9AMKOZNBShZ9wgPDs0wgAy nGzSj23KBS81TZCakUZ8dZcPQZ/jLVZn1aZjaGjWQgB2iG7wuMe7oGIqmc/FD9pSc6C8QHYCw cp6IKKcqTWIpqbKHuLV3bucqCWhJMab1z9KqEkCenovKTIU+v0qQYF/wjVyIzL2eRSF85P7iW ZZOTIXZ8vKV8arXQRYMDrds3oN6eWSU5EhedoKT/vTWSJ+7ljEvSOrWQqUC6heZpYzqAwVXUV GxwU//i7Fo9m0ovzHmJC0fZ7FOcChlVWAHIvgheneMjamqf/oAWqYx/PpBRVcPGGXFF9gtTqS /Js65jfKOm4a54yur Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=212.227.17.12; envelope-from=lukasstraub2@web.de; helo=mout.web.de X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/15 07:11:55 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] X-Spam_score_int: -24 X-Spam_score: -2.5 X-Spam_bar: -- X-Spam_report: (-2.5 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_PASS=-0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Zhang Chen , Jason Wang , Paolo Bonzini , Li Zhijian , =?UTF-8?B?TWFyYy1BbmRyw6k=?= Lureau Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-Zoho-Virus-Status: 1 X-ZohoMail-DKIM: fail (Header signature does not verify) --Sig_/tB//jzM3d.+_QoiJo3NznNz Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" If the colo-compare object is removed before failover and a checkpoint happens, qemu crashes because it tries to lock the destroyed event_mtx in colo_notify_compares_event. Fix this by checking if everything is initialized by introducing a new variable colo_compare_active which is protected by a new mutex colo_compare_mutex. The new mutex also protects against concurrent access of the net_compares list and makes sure that colo_notify_compares_event isn't active while we destroy event_mtx and event_complete_cond. With this it also is again possible to use colo without colo-compare (periodic mode) and to use multiple colo-compare for multiple network interfaces. Signed-off-by: Lukas Straub --- net/colo-compare.c | 35 +++++++++++++++++++++++++++++------ net/colo-compare.h | 1 + softmmu/vl.c | 2 ++ 3 files changed, 32 insertions(+), 6 deletions(-) diff --git a/net/colo-compare.c b/net/colo-compare.c index 7886444cdf..7205fdac29 100644 --- a/net/colo-compare.c +++ b/net/colo-compare.c @@ -54,6 +54,8 @@ static NotifierList colo_compare_notifiers =3D #define REGULAR_PACKET_CHECK_MS 3000 #define DEFAULT_TIME_OUT_MS 3000 =20 +static QemuMutex colo_compare_mutex; +static bool colo_compare_active; static QemuMutex event_mtx; static QemuCond event_complete_cond; static int event_unhandled_count; @@ -906,6 +908,12 @@ static void check_old_packet_regular(void *opaque) void colo_notify_compares_event(void *opaque, int event, Error **errp) { CompareState *s; + qemu_mutex_lock(&colo_compare_mutex); + + if (!colo_compare_active) { + qemu_mutex_unlock(&colo_compare_mutex); + return; + } =20 qemu_mutex_lock(&event_mtx); QTAILQ_FOREACH(s, &net_compares, next) { @@ -919,6 +927,7 @@ void colo_notify_compares_event(void *opaque, int event= , Error **errp) } =20 qemu_mutex_unlock(&event_mtx); + qemu_mutex_unlock(&colo_compare_mutex); } =20 static void colo_compare_timer_init(CompareState *s) @@ -1274,7 +1283,14 @@ static void colo_compare_complete(UserCreatable *uc,= Error **errp) s->vnet_hdr); } =20 + qemu_mutex_lock(&colo_compare_mutex); + if (!colo_compare_active) { + qemu_mutex_init(&event_mtx); + qemu_cond_init(&event_complete_cond); + colo_compare_active =3D true; + } QTAILQ_INSERT_TAIL(&net_compares, s, next); + qemu_mutex_unlock(&colo_compare_mutex); =20 s->out_sendco.s =3D s; s->out_sendco.chr =3D &s->chr_out; @@ -1292,9 +1308,6 @@ static void colo_compare_complete(UserCreatable *uc, = Error **errp) =20 g_queue_init(&s->conn_list); =20 - qemu_mutex_init(&event_mtx); - qemu_cond_init(&event_complete_cond); - s->connection_track_table =3D g_hash_table_new_full(connection_key_has= h, connection_key_equal, g_free, @@ -1386,12 +1399,19 @@ static void colo_compare_finalize(Object *obj) =20 qemu_bh_delete(s->event_bh); =20 + qemu_mutex_lock(&colo_compare_mutex); QTAILQ_FOREACH(tmp, &net_compares, next) { if (tmp =3D=3D s) { QTAILQ_REMOVE(&net_compares, s, next); break; } } + if (QTAILQ_EMPTY(&net_compares)) { + colo_compare_active =3D false; + qemu_mutex_destroy(&event_mtx); + qemu_cond_destroy(&event_complete_cond); + } + qemu_mutex_unlock(&colo_compare_mutex); =20 AioContext *ctx =3D iothread_get_aio_context(s->iothread); aio_context_acquire(ctx); @@ -1419,15 +1439,18 @@ static void colo_compare_finalize(Object *obj) object_unref(OBJECT(s->iothread)); } =20 - qemu_mutex_destroy(&event_mtx); - qemu_cond_destroy(&event_complete_cond); - g_free(s->pri_indev); g_free(s->sec_indev); g_free(s->outdev); g_free(s->notify_dev); } =20 +void colo_compare_init_globals(void) +{ + colo_compare_active =3D false; + qemu_mutex_init(&colo_compare_mutex); +} + static const TypeInfo colo_compare_info =3D { .name =3D TYPE_COLO_COMPARE, .parent =3D TYPE_OBJECT, diff --git a/net/colo-compare.h b/net/colo-compare.h index 22ddd512e2..eb483ac586 100644 --- a/net/colo-compare.h +++ b/net/colo-compare.h @@ -17,6 +17,7 @@ #ifndef QEMU_COLO_COMPARE_H #define QEMU_COLO_COMPARE_H =20 +void colo_compare_init_globals(void); void colo_notify_compares_event(void *opaque, int event, Error **errp); void colo_compare_register_notifier(Notifier *notify); void colo_compare_unregister_notifier(Notifier *notify); diff --git a/softmmu/vl.c b/softmmu/vl.c index 32c0047889..a913ed5469 100644 --- a/softmmu/vl.c +++ b/softmmu/vl.c @@ -112,6 +112,7 @@ #include "qapi/qmp/qerror.h" #include "sysemu/iothread.h" #include "qemu/guest-random.h" +#include "net/colo-compare.h" =20 #define MAX_VIRTIO_CONSOLES 1 =20 @@ -2906,6 +2907,7 @@ void qemu_init(int argc, char **argv, char **envp) precopy_infrastructure_init(); postcopy_infrastructure_init(); monitor_init_globals(); + colo_compare_init_globals(); =20 if (qcrypto_init(&err) < 0) { error_reportf_err(err, "cannot initialize crypto: "); --=20 2.20.1 --Sig_/tB//jzM3d.+_QoiJo3NznNz Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEEg/qxWKDZuPtyYo+kNasLKJxdslgFAl6+ePkACgkQNasLKJxd sljUdw/+J7KTnaCsuC0tjkud4CdBFu3EbLmarorsCYP1OFkgu5fM6bdxTNxiJPas K6IQMP4PZGYSgHfygkpP1fZjUsgkMVwwOLhqe4JT/A+3rB7NAE5+ll6pe/cf/D9l vIHRPBJU+8AgIQACBcLlNTFuE/vc6cmb5yrBGtQilrE/2HNSjEujziQ+bz49UyvU dea+Ie+3bByYuIE4PiZlJxMUlKmX+C191D6V0ocUb7tqJdbQ94Gx5S7d3An079TE B5WcjHLzDh9atqyXrEQBn0D7d7Mz5WFQLEJgByMIqpTNOhnqH7gMsk5DOpFo4NL/ b1qEJjkph4J4DYFBztijHclsP++cdrgKpgmo+ycdA9KrYNFIyzv6Q3ZrlpAZDlVu /mWMnIwovEBBQ13fBZmFeb3VTQc5mBEFblOMhwCbdFagFTL57ED03XAAUwIchZdm QrlP1UIU7rhR5atiu9Z0H9f4psukYF2vQ2Oge7QHUxIrXwwOujrhCWGHlCnVBvvv /xv7dZ4KhG85hN0qV/3ReYc7gftaQuyNuXY9g8rd9W/SBXBWvx7dvYLQAQdUjJ4H 01yk8bukQJdvHT+XCz3i1RChh5OyypnKbRJG0LuxYGt6oANRGrioMuZeluFDBmf3 YFBNRasgkeq0H5FlJmu7Jiw+HNlG174t7Rh/SpZ6LBdCi88kyQU= =YtT/ -----END PGP SIGNATURE----- --Sig_/tB//jzM3d.+_QoiJo3NznNz--