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Tue, 25 Jan 2022 05:18:25 -0800 (PST) Received: from localhost ([139.177.225.253]) by smtp.gmail.com with ESMTPSA id gt19sm440978pjb.50.2022.01.25.05.18.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 25 Jan 2022 05:18:25 -0800 (PST) From: Xie Yongji To: mst@redhat.com, jasowang@redhat.com, stefanha@redhat.com, sgarzare@redhat.com, kwolf@redhat.com, mreitz@redhat.com, mlureau@redhat.com Subject: [PATCH 0/5] Support exporting BDSs via VDUSE Date: Tue, 25 Jan 2022 21:17:55 +0800 Message-Id: <20220125131800.91-1-xieyongji@bytedance.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Host-Lookup-Failed: Reverse DNS lookup failed for 2607:f8b0:4864:20::435 (failed) Received-SPF: pass client-ip=2607:f8b0:4864:20::435; envelope-from=xieyongji@bytedance.com; helo=mail-pf1-x435.google.com X-Spam_score_int: -10 X-Spam_score: -1.1 X-Spam_bar: - X-Spam_report: (-1.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, PDS_HP_HELO_NORDNS=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-devel@nongnu.org, qemu-block@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Hi all, Last few months ago, VDUSE (vDPA Device in Userspace) [1] has been merged into Linux kernel as a framework that make it possible to emulate a vDPA device in userspace. This series aimed at implementing a VDUSE block backend based on the qemu-storage-daemon infrastructure. To support that, we firstly introduce a VDUSE library as a subproject (like what libvhost-user does) to help implementing VDUSE backends in QEMU. Then a VDUSE block export is implemented based on this library. At last, we add resize and reconnect support to the VDUSE block export and VDUSE library. Since we don't support vdpa-blk in QEMU currently, the VM case is tested with my previous patchset [2]. [1] https://www.kernel.org/doc/html/latest/userspace-api/vduse.html [2] https://www.mail-archive.com/qemu-devel@nongnu.org/msg797569.html Please review, thanks! Xie Yongji (5): headers: Add vduse.h libvduse: Add VDUSE (vDPA Device in Userspace) library vduse-blk: implements vduse-blk export vduse-blk: Add vduse-blk resize support libvduse: Add support for reconnecting block/export/export.c | 6 + block/export/meson.build | 5 + block/export/vduse-blk.c | 448 +++++++ block/export/vduse-blk.h | 20 + include/standard-headers/linux/vduse.h | 306 +++++ meson.build | 28 + meson_options.txt | 4 + qapi/block-export.json | 24 +- scripts/meson-buildoptions.sh | 7 + scripts/update-linux-headers.sh | 1 + subprojects/libvduse/include/atomic.h | 1 + subprojects/libvduse/libvduse.c | 1267 +++++++++++++++++++ subprojects/libvduse/libvduse.h | 195 +++ subprojects/libvduse/meson.build | 10 + subprojects/libvduse/standard-headers/linux | 1 + 15 files changed, 2321 insertions(+), 2 deletions(-) create mode 100644 block/export/vduse-blk.c create mode 100644 block/export/vduse-blk.h create mode 100644 include/standard-headers/linux/vduse.h create mode 120000 subprojects/libvduse/include/atomic.h create mode 100644 subprojects/libvduse/libvduse.c create mode 100644 subprojects/libvduse/libvduse.h create mode 100644 subprojects/libvduse/meson.build create mode 120000 subprojects/libvduse/standard-headers/linux