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bh=eMV28D7x38tNYyvnMyu9QYQABUuYx8lvBARxdG3PmWc=; b=eqdhvF+qjaxqbMpj6W7pbD9ag8Oxv7HgHFCPKm+BYV82yVpsT39s1AwtF4H390BDopnWCp +Lhb53Pp2wspbfyL7fpmq30gTP2HaUz/KIH36zCJGs2RNNbY/y0FP4fIefuER+eQfZjWny U8DSRTs3WIj8coJGwpcfE6t1JvloL34= X-MC-Unique: fToO9inxP_uUd7X4sHO2pw-1 From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PULL 26/30] sheepdog: Support BDRV_REQ_ZERO_WRITE for truncate Date: Fri, 8 May 2020 14:41:31 +0200 Message-Id: <20200508124135.252565-27-kwolf@redhat.com> In-Reply-To: <20200508124135.252565-1-kwolf@redhat.com> References: <20200508124135.252565-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 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=207.211.31.81; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/08 01:34:54 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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_NONE=-0.0001, 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: kwolf@redhat.com, peter.maydell@linaro.org, qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) Content-Type: text/plain; charset="utf-8" From: Eric Blake Our .bdrv_has_zero_init_truncate always returns 1 because sheepdog always 0-fills; we can use that same knowledge to implement BDRV_REQ_ZERO_WRITE by ignoring it. Signed-off-by: Eric Blake Message-Id: <20200428202905.770727-6-eblake@redhat.com> Signed-off-by: Kevin Wolf --- block/sheepdog.c | 1 + 1 file changed, 1 insertion(+) diff --git a/block/sheepdog.c b/block/sheepdog.c index 2eb61938ff..739e6dee30 100644 --- a/block/sheepdog.c +++ b/block/sheepdog.c @@ -1654,6 +1654,7 @@ static int sd_open(BlockDriverState *bs, QDict *optio= ns, int flags, memcpy(&s->inode, buf, sizeof(s->inode)); =20 bs->total_sectors =3D s->inode.vdi_size / BDRV_SECTOR_SIZE; + bs->supported_truncate_flags =3D BDRV_REQ_ZERO_WRITE; pstrcpy(s->name, sizeof(s->name), vdi); qemu_co_mutex_init(&s->lock); qemu_co_mutex_init(&s->queue_lock); --=20 2.25.3