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[87.11.6.234]) by smtp.gmail.com with ESMTPSA id y1-20020adfc7c1000000b0020ae65d2e91sm95612wrg.79.2022.04.28.08.12.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 28 Apr 2022 08:12:43 -0700 (PDT) From: Stefano Garzarella To: virtualization@lists.linux-foundation.org Cc: Jason Wang , linux-kernel@vger.kernel.org, "Michael S. Tsirkin" , Stefan Hajnoczi , Max Gurtovoy , Stefano Garzarella Subject: [PATCH] vdpa_sim_blk: add support for VIRTIO_BLK_T_FLUSH Date: Thu, 28 Apr 2022 17:12:42 +0200 Message-Id: <20220428151242.213824-1-sgarzare@redhat.com> X-Mailer: git-send-email 2.35.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The simulator behaves like a ramdisk, so we don't have to do anything when a VIRTIO_BLK_T_FLUSH request is received, but it could be useful to test driver behavior. Let's expose the VIRTIO_BLK_F_FLUSH feature to inform the driver that we support the flush command. Signed-off-by: Stefano Garzarella --- drivers/vdpa/vdpa_sim/vdpa_sim_blk.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c b/drivers/vdpa/vdpa_sim/v= dpa_sim_blk.c index 42d401d43911..a6dd1233797c 100644 --- a/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c +++ b/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c @@ -25,6 +25,7 @@ #define DRV_LICENSE "GPL v2" =20 #define VDPASIM_BLK_FEATURES (VDPASIM_FEATURES | \ + (1ULL << VIRTIO_BLK_F_FLUSH) | \ (1ULL << VIRTIO_BLK_F_SIZE_MAX) | \ (1ULL << VIRTIO_BLK_F_SEG_MAX) | \ (1ULL << VIRTIO_BLK_F_BLK_SIZE) | \ @@ -166,6 +167,17 @@ static bool vdpasim_blk_handle_req(struct vdpasim *vdp= asim, pushed +=3D bytes; break; =20 + case VIRTIO_BLK_T_FLUSH: + if (sector !=3D 0) { + dev_err(&vdpasim->vdpa.dev, + "A driver MUST set sector to 0 for a VIRTIO_BLK_T_FLUSH request - sect= or: 0x%llx\n", + sector); + status =3D VIRTIO_BLK_S_IOERR; + break; + } + + break; + default: dev_warn(&vdpasim->vdpa.dev, "Unsupported request type %d\n", type); --=20 2.35.1