From patchwork Fri Apr 28 12:39:46 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Hajnoczi X-Patchwork-Id: 13226418 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 96B45C77B61 for ; Fri, 28 Apr 2023 12:41:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346084AbjD1MlR (ORCPT ); Fri, 28 Apr 2023 08:41:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41680 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346039AbjD1MlO (ORCPT ); Fri, 28 Apr 2023 08:41:14 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AE2214497 for ; Fri, 28 Apr 2023 05:40:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1682685624; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=n9hx8swNthm3d9dHaInRN+HJ/JBUo8h7dHzzksYBthw=; b=eXWILgR9GIlrZSXQRmM9Urf69nSC02JOjjZT5WB2CsIMF/ziQCXpl4jLoeU/RiQlIPV03d ijvceBchNwASO9+ODZtW2QyzpEhxuBSfpuz0AJs6ePw1NVyIinbPXSmeYfBNO5ijZvTrmC x9/WRqiRl3JP3F1qQul2OgFAyVqYl5E= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-636-dN8BKPE_O1W573ABrpvVdw-1; Fri, 28 Apr 2023 08:40:21 -0400 X-MC-Unique: dN8BKPE_O1W573ABrpvVdw-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 159253C0E44F; Fri, 28 Apr 2023 12:40:21 +0000 (UTC) Received: from localhost (unknown [10.39.192.223]) by smtp.corp.redhat.com (Postfix) with ESMTP id 248EF2027043; Fri, 28 Apr 2023 12:40:19 +0000 (UTC) From: Stefan Hajnoczi To: qemu-devel@nongnu.org Cc: Thomas Huth , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , Raphael Norwitz , Julia Suvorova , Cornelia Huck , Eric Blake , Paolo Bonzini , Aarushi Mehta , Stefan Hajnoczi , Richard Henderson , Kevin Wolf , Markus Armbruster , Stefano Garzarella , qemu-block@nongnu.org, Hanna Reitz , Fam Zheng , =?utf-8?q?Marc?= =?utf-8?q?-Andr=C3=A9_Lureau?= , "Michael S. Tsirkin" , kvm@vger.kernel.org, =?utf-8?q?Phili?= =?utf-8?q?ppe_Mathieu-Daud=C3=A9?= , Sam Li Subject: [PULL 09/17] file-posix: add tracking of the zone write pointers Date: Fri, 28 Apr 2023 08:39:46 -0400 Message-Id: <20230428123954.179035-10-stefanha@redhat.com> In-Reply-To: <20230428123954.179035-1-stefanha@redhat.com> References: <20230428123954.179035-1-stefanha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.4 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Sam Li Since Linux doesn't have a user API to issue zone append operations to zoned devices from user space, the file-posix driver is modified to add zone append emulation using regular writes. To do this, the file-posix driver tracks the wp location of all zones of the device. It uses an array of uint64_t. The most significant bit of each wp location indicates if the zone type is conventional zones. The zones wp can be changed due to the following operations issued: - zone reset: change the wp to the start offset of that zone - zone finish: change to the end location of that zone - write to a zone - zone append Signed-off-by: Sam Li Message-id: 20230427172339.3709-2-faithilikerun@gmail.com [Fix errno propagation from handle_aiocb_zone_mgmt() --Stefan] Signed-off-by: Stefan Hajnoczi --- include/block/block-common.h | 14 +++ include/block/block_int-common.h | 5 + block/file-posix.c | 178 ++++++++++++++++++++++++++++++- 3 files changed, 193 insertions(+), 4 deletions(-) diff --git a/include/block/block-common.h b/include/block/block-common.h index 1576fcf2ed..93196229ac 100644 --- a/include/block/block-common.h +++ b/include/block/block-common.h @@ -118,6 +118,14 @@ typedef struct BlockZoneDescriptor { BlockZoneState state; } BlockZoneDescriptor; +/* + * Track write pointers of a zone in bytes. + */ +typedef struct BlockZoneWps { + CoMutex colock; + uint64_t wp[]; +} BlockZoneWps; + typedef struct BlockDriverInfo { /* in bytes, 0 if irrelevant */ int cluster_size; @@ -240,6 +248,12 @@ typedef enum { #define BDRV_SECTOR_BITS 9 #define BDRV_SECTOR_SIZE (1ULL << BDRV_SECTOR_BITS) +/* + * Get the first most significant bit of wp. If it is zero, then + * the zone type is SWR. + */ +#define BDRV_ZT_IS_CONV(wp) (wp & (1ULL << 63)) + #define BDRV_REQUEST_MAX_SECTORS MIN_CONST(SIZE_MAX >> BDRV_SECTOR_BITS, \ INT_MAX >> BDRV_SECTOR_BITS) #define BDRV_REQUEST_MAX_BYTES (BDRV_REQUEST_MAX_SECTORS << BDRV_SECTOR_BITS) diff --git a/include/block/block_int-common.h b/include/block/block_int-common.h index 3482cfa79e..d138a399c7 100644 --- a/include/block/block_int-common.h +++ b/include/block/block_int-common.h @@ -890,6 +890,8 @@ typedef struct BlockLimits { /* maximum number of active zones */ int64_t max_active_zones; + + int64_t write_granularity; } BlockLimits; typedef struct BdrvOpBlocker BdrvOpBlocker; @@ -1251,6 +1253,9 @@ struct BlockDriverState { CoMutex bsc_modify_lock; /* Always non-NULL, but must only be dereferenced under an RCU read guard */ BdrvBlockStatusCache *block_status_cache; + + /* array of write pointers' location of each zone in the zoned device. */ + BlockZoneWps *wps; }; struct BlockBackendRootState { diff --git a/block/file-posix.c b/block/file-posix.c index 701acddbca..e7ad6bb4e7 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -1327,9 +1327,93 @@ static int hdev_get_max_segments(int fd, struct stat *st) } #if defined(CONFIG_BLKZONED) +/* + * If the reset_all flag is true, then the wps of zone whose state is + * not readonly or offline should be all reset to the start sector. + * Else, take the real wp of the device. + */ +static int get_zones_wp(BlockDriverState *bs, int fd, int64_t offset, + unsigned int nrz, bool reset_all) +{ + struct blk_zone *blkz; + size_t rep_size; + uint64_t sector = offset >> BDRV_SECTOR_BITS; + BlockZoneWps *wps = bs->wps; + unsigned int j = offset / bs->bl.zone_size; + unsigned int n = 0, i = 0; + int ret; + rep_size = sizeof(struct blk_zone_report) + nrz * sizeof(struct blk_zone); + g_autofree struct blk_zone_report *rep = NULL; + + rep = g_malloc(rep_size); + blkz = (struct blk_zone *)(rep + 1); + while (n < nrz) { + memset(rep, 0, rep_size); + rep->sector = sector; + rep->nr_zones = nrz - n; + + do { + ret = ioctl(fd, BLKREPORTZONE, rep); + } while (ret != 0 && errno == EINTR); + if (ret != 0) { + error_report("%d: ioctl BLKREPORTZONE at %" PRId64 " failed %d", + fd, offset, errno); + return -errno; + } + + if (!rep->nr_zones) { + break; + } + + for (i = 0; i < rep->nr_zones; ++i, ++n, ++j) { + /* + * The wp tracking cares only about sequential writes required and + * sequential write preferred zones so that the wp can advance to + * the right location. + * Use the most significant bit of the wp location to indicate the + * zone type: 0 for SWR/SWP zones and 1 for conventional zones. + */ + if (blkz[i].type == BLK_ZONE_TYPE_CONVENTIONAL) { + wps->wp[j] |= 1ULL << 63; + } else { + switch(blkz[i].cond) { + case BLK_ZONE_COND_FULL: + case BLK_ZONE_COND_READONLY: + /* Zone not writable */ + wps->wp[j] = (blkz[i].start + blkz[i].len) << BDRV_SECTOR_BITS; + break; + case BLK_ZONE_COND_OFFLINE: + /* Zone not writable nor readable */ + wps->wp[j] = (blkz[i].start) << BDRV_SECTOR_BITS; + break; + default: + if (reset_all) { + wps->wp[j] = blkz[i].start << BDRV_SECTOR_BITS; + } else { + wps->wp[j] = blkz[i].wp << BDRV_SECTOR_BITS; + } + break; + } + } + } + sector = blkz[i - 1].start + blkz[i - 1].len; + } + + return 0; +} + +static void update_zones_wp(BlockDriverState *bs, int fd, int64_t offset, + unsigned int nrz) +{ + if (get_zones_wp(bs, fd, offset, nrz, 0) < 0) { + error_report("update zone wp failed"); + } +} + static void raw_refresh_zoned_limits(BlockDriverState *bs, struct stat *st, Error **errp) { + BDRVRawState *s = bs->opaque; BlockZoneModel zoned; int ret; @@ -1380,6 +1464,23 @@ static void raw_refresh_zoned_limits(BlockDriverState *bs, struct stat *st, if (ret > 0) { bs->bl.max_append_sectors = ret >> BDRV_SECTOR_BITS; } + + ret = get_sysfs_long_val(st, "physical_block_size"); + if (ret >= 0) { + bs->bl.write_granularity = ret; + } + + /* The refresh_limits() function can be called multiple times. */ + g_free(bs->wps); + bs->wps = g_malloc(sizeof(BlockZoneWps) + + sizeof(int64_t) * bs->bl.nr_zones); + ret = get_zones_wp(bs, s->fd, 0, bs->bl.nr_zones, 0); + if (ret < 0) { + error_setg_errno(errp, -ret, "report wps failed"); + bs->wps = NULL; + return; + } + qemu_co_mutex_init(&bs->wps->colock); } #else /* !defined(CONFIG_BLKZONED) */ static void raw_refresh_zoned_limits(BlockDriverState *bs, struct stat *st, @@ -2065,7 +2166,7 @@ static int handle_aiocb_zone_mgmt(void *opaque) ret = ioctl(fd, aiocb->zone_mgmt.op, &range); } while (ret != 0 && errno == EINTR); - return ret; + return ret < 0 ? -errno : ret; } #endif @@ -2351,9 +2452,15 @@ static int coroutine_fn raw_co_prw(BlockDriverState *bs, uint64_t offset, { BDRVRawState *s = bs->opaque; RawPosixAIOData acb; + int ret; if (fd_open(bs) < 0) return -EIO; +#if defined(CONFIG_BLKZONED) + if (type & QEMU_AIO_WRITE && bs->wps) { + qemu_co_mutex_lock(&bs->wps->colock); + } +#endif /* * When using O_DIRECT, the request must be aligned to be able to use @@ -2366,12 +2473,15 @@ static int coroutine_fn raw_co_prw(BlockDriverState *bs, uint64_t offset, #ifdef CONFIG_LINUX_IO_URING } else if (s->use_linux_io_uring) { assert(qiov->size == bytes); - return luring_co_submit(bs, s->fd, offset, qiov, type); + ret = luring_co_submit(bs, s->fd, offset, qiov, type); + goto out; #endif #ifdef CONFIG_LINUX_AIO } else if (s->use_linux_aio) { assert(qiov->size == bytes); - return laio_co_submit(s->fd, offset, qiov, type, s->aio_max_batch); + ret = laio_co_submit(s->fd, offset, qiov, type, + s->aio_max_batch); + goto out; #endif } @@ -2388,7 +2498,35 @@ static int coroutine_fn raw_co_prw(BlockDriverState *bs, uint64_t offset, }; assert(qiov->size == bytes); - return raw_thread_pool_submit(handle_aiocb_rw, &acb); + ret = raw_thread_pool_submit(handle_aiocb_rw, &acb); + goto out; /* Avoid the compiler err of unused label */ + +out: +#if defined(CONFIG_BLKZONED) +{ + BlockZoneWps *wps = bs->wps; + if (ret == 0) { + if (type & QEMU_AIO_WRITE && wps && bs->bl.zone_size) { + uint64_t *wp = &wps->wp[offset / bs->bl.zone_size]; + if (!BDRV_ZT_IS_CONV(*wp)) { + /* Advance the wp if needed */ + if (offset + bytes > *wp) { + *wp = offset + bytes; + } + } + } + } else { + if (type & QEMU_AIO_WRITE) { + update_zones_wp(bs, s->fd, 0, 1); + } + } + + if (type & QEMU_AIO_WRITE && wps) { + qemu_co_mutex_unlock(&wps->colock); + } +} +#endif + return ret; } static int coroutine_fn raw_co_preadv(BlockDriverState *bs, int64_t offset, @@ -2491,6 +2629,9 @@ static void raw_close(BlockDriverState *bs) BDRVRawState *s = bs->opaque; if (s->fd >= 0) { +#if defined(CONFIG_BLKZONED) + g_free(bs->wps); +#endif qemu_close(s->fd); s->fd = -1; } @@ -3288,6 +3429,7 @@ static int coroutine_fn raw_co_zone_mgmt(BlockDriverState *bs, BlockZoneOp op, const char *op_name; unsigned long zo; int ret; + BlockZoneWps *wps = bs->wps; int64_t capacity = bs->total_sectors << BDRV_SECTOR_BITS; zone_size = bs->bl.zone_size; @@ -3305,6 +3447,14 @@ static int coroutine_fn raw_co_zone_mgmt(BlockDriverState *bs, BlockZoneOp op, return -EINVAL; } + uint32_t i = offset / bs->bl.zone_size; + uint32_t nrz = len / bs->bl.zone_size; + uint64_t *wp = &wps->wp[i]; + if (BDRV_ZT_IS_CONV(*wp) && len != capacity) { + error_report("zone mgmt operations are not allowed for conventional zones"); + return -EIO; + } + switch (op) { case BLK_ZO_OPEN: op_name = "BLKOPENZONE"; @@ -3342,7 +3492,27 @@ static int coroutine_fn raw_co_zone_mgmt(BlockDriverState *bs, BlockZoneOp op, len >> BDRV_SECTOR_BITS); ret = raw_thread_pool_submit(handle_aiocb_zone_mgmt, &acb); if (ret != 0) { + update_zones_wp(bs, s->fd, offset, i); error_report("ioctl %s failed %d", op_name, ret); + return ret; + } + + if (zo == BLKRESETZONE && len == capacity) { + ret = get_zones_wp(bs, s->fd, 0, bs->bl.nr_zones, 1); + if (ret < 0) { + error_report("reporting single wp failed"); + return ret; + } + } else if (zo == BLKRESETZONE) { + for (unsigned int j = 0; j < nrz; ++j) { + wp[j] = offset + j * zone_size; + } + } else if (zo == BLKFINISHZONE) { + for (unsigned int j = 0; j < nrz; ++j) { + /* The zoned device allows the last zone smaller that the + * zone size. */ + wp[j] = MIN(offset + (j + 1) * zone_size, offset + len); + } } return ret;