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bh=8YSFq7bBskQsu6wtk6d78JeioHb6gBPhp3TAtAYXYsk=; b=CqZPauItEoeEjtYmG0cNaFg36p4RKp258PP6Ih/p5ISjmMGc/EL5RnZUHISnXS1OHkgtlz nsv3pNR59Izn0+9BRcKNSJlNR1RISRO1oZHyCWNz+qe6w0epkSOAD0aGD3uojGpsRfZuCV Ub3ElXgAn+utv5hTATDH1wnn6BVsJrI= X-MC-Unique: LC9zIhAhNAGEfqRDvESI_Q-1 From: "Dr. David Alan Gilbert (git)" To: qemu-devel@nongnu.org Subject: [PULL 3/5] virtiofsd: Add a helper to send element on virtqueue Date: Tue, 26 Oct 2021 11:29:31 +0100 Message-Id: <20211026102933.103139-4-dgilbert@redhat.com> In-Reply-To: <20211026102933.103139-1-dgilbert@redhat.com> References: <20211026102933.103139-1-dgilbert@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dgilbert@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable 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=170.10.129.124; envelope-from=dgilbert@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no 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: vgoyal@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1635244796625100001 Content-Type: text/plain; charset="utf-8" From: Vivek Goyal We have open coded logic to take locks and push element on virtqueue at three places. Add a helper and use it everywhere. Code is easier to read and less number of lines of code. Signed-off-by: Vivek Goyal Message-Id: <20210930153037.1194279-5-vgoyal@redhat.com> Reviewed-by: Stefan Hajnoczi Signed-off-by: Dr. David Alan Gilbert --- tools/virtiofsd/fuse_virtio.c | 45 ++++++++++++++--------------------- 1 file changed, 18 insertions(+), 27 deletions(-) diff --git a/tools/virtiofsd/fuse_virtio.c b/tools/virtiofsd/fuse_virtio.c index da7b6a76bf..fcf12db9cd 100644 --- a/tools/virtiofsd/fuse_virtio.c +++ b/tools/virtiofsd/fuse_virtio.c @@ -243,6 +243,21 @@ static void vu_dispatch_unlock(struct fv_VuDev *vud) assert(ret =3D=3D 0); } =20 +static void vq_send_element(struct fv_QueueInfo *qi, VuVirtqElement *elem, + ssize_t len) +{ + struct fuse_session *se =3D qi->virtio_dev->se; + VuDev *dev =3D &se->virtio_dev->dev; + VuVirtq *q =3D vu_get_queue(dev, qi->qidx); + + vu_dispatch_rdlock(qi->virtio_dev); + pthread_mutex_lock(&qi->vq_lock); + vu_queue_push(dev, q, elem, len); + vu_queue_notify(dev, q); + pthread_mutex_unlock(&qi->vq_lock); + vu_dispatch_unlock(qi->virtio_dev); +} + /* * Called back by ll whenever it wants to send a reply/message back * The 1st element of the iov starts with the fuse_out_header @@ -253,8 +268,6 @@ int virtio_send_msg(struct fuse_session *se, struct fus= e_chan *ch, { FVRequest *req =3D container_of(ch, FVRequest, ch); struct fv_QueueInfo *qi =3D ch->qi; - VuDev *dev =3D &se->virtio_dev->dev; - VuVirtq *q =3D vu_get_queue(dev, qi->qidx); VuVirtqElement *elem =3D &req->elem; int ret =3D 0; =20 @@ -296,13 +309,7 @@ int virtio_send_msg(struct fuse_session *se, struct fu= se_chan *ch, =20 copy_iov(iov, count, in_sg, in_num, tosend_len); =20 - vu_dispatch_rdlock(qi->virtio_dev); - pthread_mutex_lock(&qi->vq_lock); - vu_queue_push(dev, q, elem, tosend_len); - vu_queue_notify(dev, q); - pthread_mutex_unlock(&qi->vq_lock); - vu_dispatch_unlock(qi->virtio_dev); - + vq_send_element(qi, elem, tosend_len); req->reply_sent =3D true; =20 err: @@ -321,8 +328,6 @@ int virtio_send_data_iov(struct fuse_session *se, struc= t fuse_chan *ch, { FVRequest *req =3D container_of(ch, FVRequest, ch); struct fv_QueueInfo *qi =3D ch->qi; - VuDev *dev =3D &se->virtio_dev->dev; - VuVirtq *q =3D vu_get_queue(dev, qi->qidx); VuVirtqElement *elem =3D &req->elem; int ret =3D 0; g_autofree struct iovec *in_sg_cpy =3D NULL; @@ -430,12 +435,7 @@ int virtio_send_data_iov(struct fuse_session *se, stru= ct fuse_chan *ch, out_sg->len =3D tosend_len; } =20 - vu_dispatch_rdlock(qi->virtio_dev); - pthread_mutex_lock(&qi->vq_lock); - vu_queue_push(dev, q, elem, tosend_len); - vu_queue_notify(dev, q); - pthread_mutex_unlock(&qi->vq_lock); - vu_dispatch_unlock(qi->virtio_dev); + vq_send_element(qi, elem, tosend_len); req->reply_sent =3D true; return 0; } @@ -447,7 +447,6 @@ static void fv_queue_worker(gpointer data, gpointer use= r_data) { struct fv_QueueInfo *qi =3D user_data; struct fuse_session *se =3D qi->virtio_dev->se; - struct VuDev *dev =3D &qi->virtio_dev->dev; FVRequest *req =3D data; VuVirtqElement *elem =3D &req->elem; struct fuse_buf fbuf =3D {}; @@ -589,17 +588,9 @@ out: =20 /* If the request has no reply, still recycle the virtqueue element */ if (!req->reply_sent) { - struct VuVirtq *q =3D vu_get_queue(dev, qi->qidx); - fuse_log(FUSE_LOG_DEBUG, "%s: elem %d no reply sent\n", __func__, elem->index); - - vu_dispatch_rdlock(qi->virtio_dev); - pthread_mutex_lock(&qi->vq_lock); - vu_queue_push(dev, q, elem, 0); - vu_queue_notify(dev, q); - pthread_mutex_unlock(&qi->vq_lock); - vu_dispatch_unlock(qi->virtio_dev); + vq_send_element(qi, elem, 0); } =20 pthread_mutex_destroy(&req->ch.lock); --=20 2.31.1