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Tue, 23 Jun 2020 16:42:57 +0200 Date: Tue, 23 Jun 2020 16:42:56 +0200 From: Lukas Straub To: qemu-devel Subject: [PATCH v5 5/7] io/channel-tls.c: make qio_channel_tls_shutdown thread-safe Message-ID: In-Reply-To: References: MIME-Version: 1.0 X-Provags-ID: V03:K1:JzrpfeIQ8CpPCekPtyoLxLgUJ8CGMRtgW549i29qab60bCywFjm 122WEpOsT2JxpOCqxgK6vdcYTgWc60nOv11PFrdVBXQ68W6F2CNiu9rofsTnnQgLmzM6ikD 7kTqTJADaFBbAutAJ57S92Mbrrf68iJns03WJuDYyXYeH51oLKBnofdQ2FhGMPoPim8ruP8 wmRH0c7wyLWBsCC/+H2Kg== X-UI-Out-Filterresults: notjunk:1;V03:K0:HFXjYqe2qpQ=:H4ukt0c+cIKFGhGH7gbjyA LB+KnKtF+5A3bzPBTMnCeib2LyBQXyP21pUwBm3Asz8y5aGuGZoZOfVDiBwXDCqcLD9LVk4LR J2d0LiGtNMJh4qmjRvQjoIWCNOniji4xOMTGjbaNP0T7yFTBbkrW0pQp8gj5FvrZtolSznqTU B58ld1xexmCcg4rs/QkMLzraOo0XdeNYFBNniAt/tpV9pc+aUu0hEha86nMH9V9i8wtjbvERx sLt4VUig0mdPnE8SvAJLLqNYOau9BY0W2i5bTNvnBf52GTD8gq6AF4wuqTIk9puHKutjaYPvn T5iohzxNaSm2SfjixsjaEKH6K3Ow+C6niLlIPUwAb+H+rnrORKmIdzG7+zmSLyIbcWm3pp68b C7Cj0ctTnJE30taMzHehkTZBrSZup6nvjv46MRb44Qwqxd1246mhwMcptacz79SmnJSYOWTez 6LZQNaYxnSBNp/FqGlIzJkNCoWEZjOPpxoWWAuv+ZkMt8DuRyhJx9L6rdhh1Xz1SHYcoLHOgo 71hdgTCcb043Knf3id+Nl8uZnPJ0JcOhmScckwZStDYKnUOh/9E7mQ+tGYLvroAUdQAandXJY i3idI0AH5H/rS4Jp0cBE8Leh2hjVcVaagasVtzcwItwOu33yakw5SVlI9URXCZ/YS0aezzGsj c2DaD7BprfAqBfYTbMpbeXiSo4oZCk6DiUdS3uduEUpcY7yA+25mNHZBPz9XemFpR9zMm4tBs c3MaIGjYHaQhTJjzsfPQ/dyZReNyzg9fI5Y7bb/64Xwc9g9GDWLfGWnqGqbC/cP1YXoLf8B6O pRNEaywm2cHtg68oTwVMFW5JEooVH6AuJjiH14FcRHUffjzDXvRPJucYLPluy6lAw8jixhNfS c2bgDpJTuS6emEwGU/sYLZ4AT5wQJlZjdt8ggplQ+EgQQtA8lpr+gC3QvB03dvWYU+o8EbFe8 aogOrNpytG+ezJFiEMtly9z2nrnBO/DyEGmQ2Oq3r2AT2CHe2Zn52rFJXvz8rKC1rDP39GOkN h6H2dQmwZ8xBcJftoXm6+WNE1zRqrJpbNVnkJ3VwprH0I4GysykWtwdImM592bCE4jA3Ki5Ih uDPUpxU0vttYmxuRGytHtTQj6wUVmVnytVqUwyiioo1HeX/x3wY/zRe55Lf7ZLWRlFlVJV0NP 2LlDIRcI8bOHpNTV25R5Dj1RUFJG9jYeQ8pvSJcz8bsfZr/QqcmSM5bxZ75/6TQ8wkT+BGVIz NMLMW3YHiilemEWvY Received-SPF: pass client-ip=212.227.15.3; envelope-from=lukasstraub2@web.de; helo=mout.web.de X-detected-operating-system: by eggs.gnu.org: First seen = 2020/06/23 10:42:47 X-ACL-Warn: Detected OS = Linux 3.11 and newer X-Spam_score_int: -25 X-Spam_score: -2.6 X-Spam_bar: -- X-Spam_report: (-2.6 / 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=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=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: Kevin Wolf , "Daniel P. =?utf-8?b?QmVycmFuZ8Op?= " , qemu-block , Juan Quintela , "Dr. David Alan Gilbert" , Max Reitz , Paolo Bonzini , =?utf-8?q?Marc-Andr=C3=A9?= Lureau Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Make qio_channel_tls_shutdown thread-safe by using atomics when accessing tioc->shutdown. Signed-off-by: Lukas Straub Reviewed-by: Daniel P. Berrangé --- io/channel-tls.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) -- 2.20.1 diff --git a/io/channel-tls.c b/io/channel-tls.c index 7ec8ceff2f..b350c84640 100644 --- a/io/channel-tls.c +++ b/io/channel-tls.c @@ -23,6 +23,7 @@ #include "qemu/module.h" #include "io/channel-tls.h" #include "trace.h" +#include "qemu/atomic.h" static ssize_t qio_channel_tls_write_handler(const char *buf, @@ -277,7 +278,8 @@ static ssize_t qio_channel_tls_readv(QIOChannel *ioc, return QIO_CHANNEL_ERR_BLOCK; } } else if (errno == ECONNABORTED && - (tioc->shutdown & QIO_CHANNEL_SHUTDOWN_READ)) { + (atomic_load_acquire(&tioc->shutdown) & + QIO_CHANNEL_SHUTDOWN_READ)) { return 0; } @@ -361,7 +363,7 @@ static int qio_channel_tls_shutdown(QIOChannel *ioc, { QIOChannelTLS *tioc = QIO_CHANNEL_TLS(ioc); - tioc->shutdown |= how; + atomic_or(&tioc->shutdown, how); return qio_channel_shutdown(tioc->master, how, errp); }