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Tue, 26 Jan 2021 12:25:44 +0100 Received: (qmail 32749 invoked from network); 26 Jan 2021 11:25:48 -0000 Received: from lieven-pc.kamp-intra.net (HELO lieven-pc) (relay@kamp.de@::ffff:172.21.12.60) by submission.kamp.de with ESMTPS (DHE-RSA-AES256-GCM-SHA384 encrypted) ESMTPA; 26 Jan 2021 11:25:48 -0000 Received: by lieven-pc (Postfix, from userid 1060) id DB32613DC8C; Tue, 26 Jan 2021 12:25:47 +0100 (CET) From: Peter Lieven To: qemu-block@nongnu.org Subject: [PATCH V2 6/7] block/rbd: add write zeroes support Date: Tue, 26 Jan 2021 12:25:39 +0100 Message-Id: <20210126112540.11880-7-pl@kamp.de> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210126112540.11880-1-pl@kamp.de> References: <20210126112540.11880-1-pl@kamp.de> Received-SPF: pass client-ip=195.62.97.192; envelope-from=pl@kamp.de; helo=kerio.kamp.de X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, 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: kwolf@redhat.com, Peter Lieven , qemu-devel@nongnu.org, ct@flyingcircus.io, pbonzini@redhat.com, mreitz@redhat.com, dillaman@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: Peter Lieven --- block/rbd.c | 36 +++++++++++++++++++++++++++++++++++- 1 file changed, 35 insertions(+), 1 deletion(-) diff --git a/block/rbd.c b/block/rbd.c index d11a3c6dd1..35dc1dc90e 100644 --- a/block/rbd.c +++ b/block/rbd.c @@ -63,7 +63,8 @@ typedef enum { RBD_AIO_READ, RBD_AIO_WRITE, RBD_AIO_DISCARD, - RBD_AIO_FLUSH + RBD_AIO_FLUSH, + RBD_AIO_WRITE_ZEROES } RBDAIOCmd; typedef struct BDRVRBDState { @@ -695,6 +696,9 @@ static int qemu_rbd_open(BlockDriverState *bs, QDict *options, int flags, } s->aio_context = bdrv_get_aio_context(bs); +#ifdef LIBRBD_SUPPORTS_WRITE_ZEROES + bs->supported_zero_flags = BDRV_REQ_MAY_UNMAP; +#endif /* When extending regular files, we get zeros from the OS */ bs->supported_truncate_flags = BDRV_REQ_ZERO_WRITE; @@ -808,6 +812,18 @@ static int coroutine_fn qemu_rbd_start_co(BlockDriverState *bs, case RBD_AIO_FLUSH: r = rbd_aio_flush(s->image, c); break; +#ifdef LIBRBD_SUPPORTS_WRITE_ZEROES + case RBD_AIO_WRITE_ZEROES: { + int zero_flags = 0; +#ifdef RBD_WRITE_ZEROES_FLAG_THICK_PROVISION + if (!(flags & BDRV_REQ_MAY_UNMAP)) { + zero_flags = RBD_WRITE_ZEROES_FLAG_THICK_PROVISION; + } +#endif + r = rbd_aio_write_zeroes(s->image, offset, bytes, c, zero_flags, 0); + break; + } +#endif default: r = -EINVAL; } @@ -878,6 +894,21 @@ static int coroutine_fn qemu_rbd_co_pdiscard(BlockDriverState *bs, return qemu_rbd_start_co(bs, offset, count, NULL, 0, RBD_AIO_DISCARD); } +#ifdef LIBRBD_SUPPORTS_WRITE_ZEROES +static int +coroutine_fn qemu_rbd_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset, + int count, BdrvRequestFlags flags) +{ +#ifndef RBD_WRITE_ZEROES_FLAG_THICK_PROVISION + if (!(flags & BDRV_REQ_MAY_UNMAP)) { + return -ENOTSUP; + } +#endif + return qemu_rbd_start_co(bs, offset, count, NULL, flags, + RBD_AIO_WRITE_ZEROES); +} +#endif + static int qemu_rbd_getinfo(BlockDriverState *bs, BlockDriverInfo *bdi) { BDRVRBDState *s = bs->opaque; @@ -1110,6 +1141,9 @@ static BlockDriver bdrv_rbd = { .bdrv_co_pwritev = qemu_rbd_co_pwritev, .bdrv_co_flush_to_disk = qemu_rbd_co_flush, .bdrv_co_pdiscard = qemu_rbd_co_pdiscard, +#ifdef LIBRBD_SUPPORTS_WRITE_ZEROES + .bdrv_co_pwrite_zeroes = qemu_rbd_co_pwrite_zeroes, +#endif .bdrv_snapshot_create = qemu_rbd_snap_create, .bdrv_snapshot_delete = qemu_rbd_snap_remove,