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([106.84.129.9]) by smtp.gmail.com with ESMTPSA id ke15-20020a170903340f00b0019a96d3b456sm1146930plb.44.2023.03.10.02.31.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 10 Mar 2023 02:31:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; t=1678444277; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=eASBV6a+3xRzDIo6K77PaLzMarbUsFxFX0l3oKWpYhc=; b=TU91raMGn/lL2L8KWwZBxHogS/Cs505iapKuhwo+Wqb39hv+z6INxuPBG6oPxTsDgi M4lYz21ESg0cYoN/RZYDx8+vK8H9irboWv56wyzSArd3BUPJ7sxfVnK+WEPTBEeHZVLr 3v8EecaJC3aFMmUmcgNYNO963unn0ZJjPv9mG8Q9qZibZALOL4h45fL65RLX3MYHPxUj dGJH3y8J3G+CaUripXGtqdnrgWNoQv50q3An/QiqajgMFhM1DS4+o3u9vLy/Ukuce9W9 Fxd0CcwD+7uIegu+vAPEfaDDY48acpKtQUIl15+c6cYZUCt5g/KABT+h91gII27UAlXH DVLw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1678444277; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=eASBV6a+3xRzDIo6K77PaLzMarbUsFxFX0l3oKWpYhc=; b=pTt6kYPt11qyEtJkr0keKFox3z+H9R3/qO940aVM3kD+FMburK/wlCvKxr8XcxTdqI pELZYZ3epdYegssnYED+bZdxRzH0RlllM5khkQJxWu6s1eZMFXMhNB/CAzGMdIwSUs01 GJFWdQWWlxAuQe+9hu7LFqN7DRvw4qsVNbsk0HAhJNrrTB7xfy5W2er2pNv4THp2RYzY 5kfxUZtErKn7w9fLHyd2DyY9kOvjjJEbs6+wCSxCrtUrf7egsWiYkvydGi8zzcFnUJAV bhiwdLJfF+52UT4om/WkuClOL+Ks4hs2EPmR2v9eYoiyL7/sLiiXhUYR3yMHuzUV9reI FHLg== X-Gm-Message-State: AO0yUKVcIPNKcjV8fo//Ud+4zykDrr5sTjkaNw+fZwWJtoMwORL3nSu3 seFnt0PI+uv2k5liQaj+qZsEktRFMCrvvGaym+A= X-Google-Smtp-Source: AK7set+cWk9Brsa9xAhZ6VBvdm49lky/WEYcvfdVL6O/NPm+39A/e/guus5tuyVFIef4hF70SZBkpQ== X-Received: by 2002:a17:902:f552:b0:19e:6966:cddc with SMTP id h18-20020a170902f55200b0019e6966cddcmr5401666plf.1.1678444276498; Fri, 10 Mar 2023 02:31:16 -0800 (PST) From: Sam Li To: qemu-devel@nongnu.org Cc: Kevin Wolf , Fam Zheng , dmitry.fomichev@wdc.com, qemu-block@nongnu.org, stefanha@redhat.com, hare@suse.de, Julia Suvorova , Stefano Garzarella , Hanna Reitz , damien.lemoal@opensource.wdc.com, Aarushi Mehta , Sam Li Subject: [PATCH v6 1/4] file-posix: add tracking of the zone write pointers Date: Fri, 10 Mar 2023 18:31:03 +0800 Message-Id: <20230310103106.62124-2-faithilikerun@gmail.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230310103106.62124-1-faithilikerun@gmail.com> References: <20230310103106.62124-1-faithilikerun@gmail.com> MIME-Version: 1.0 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=2607:f8b0:4864:20::62b; envelope-from=faithilikerun@gmail.com; helo=mail-pl1-x62b.google.com 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, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, 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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1678444402148100001 Content-Type: text/plain; charset="utf-8" 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 --- block/file-posix.c | 159 ++++++++++++++++++++++++++++++- include/block/block-common.h | 14 +++ include/block/block_int-common.h | 3 + 3 files changed, 172 insertions(+), 4 deletions(-) diff --git a/block/file-posix.c b/block/file-posix.c index 563acc76ae..61ed769ac8 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -1324,6 +1324,77 @@ static int hdev_get_max_segments(int fd, struct stat= *st) #endif } =20 +#if defined(CONFIG_BLKZONED) +static int get_zones_wp(int fd, BlockZoneWps *wps, int64_t offset, + unsigned int nrz) { + struct blk_zone *blkz; + size_t rep_size; + uint64_t sector =3D offset >> BDRV_SECTOR_BITS; + int ret, n =3D 0, i =3D 0; + rep_size =3D sizeof(struct blk_zone_report) + nrz * sizeof(struct blk_= zone); + g_autofree struct blk_zone_report *rep =3D NULL; + + rep =3D g_malloc(rep_size); + blkz =3D (struct blk_zone *)(rep + 1); + while (n < nrz) { + memset(rep, 0, rep_size); + rep->sector =3D sector; + rep->nr_zones =3D nrz - n; + + do { + ret =3D ioctl(fd, BLKREPORTZONE, rep); + } while (ret !=3D 0 && errno =3D=3D EINTR); + if (ret !=3D 0) { + error_report("%d: ioctl BLKREPORTZONE at %" PRId64 " failed %d= ", + fd, offset, errno); + return -errno; + } + + if (!rep->nr_zones) { + break; + } + + for (i =3D 0; i < rep->nr_zones; i++, n++) { + /* + * 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 =3D=3D BLK_ZONE_TYPE_CONVENTIONAL) { + wps->wp[i] =3D 1ULL << 63; + } else { + switch(blkz[i].cond) { + case BLK_ZONE_COND_FULL: + case BLK_ZONE_COND_READONLY: + /* Zone not writable */ + wps->wp[i] =3D (blkz[i].start + blkz[i].len) << BDRV_S= ECTOR_BITS; + break; + case BLK_ZONE_COND_OFFLINE: + /* Zone not writable nor readable */ + wps->wp[i] =3D (blkz[i].start) << BDRV_SECTOR_BITS; + break; + default: + wps->wp[i] =3D blkz[i].wp << BDRV_SECTOR_BITS; + break; + } + } + } + sector =3D blkz[i - 1].start + blkz[i - 1].len; + } + + return 0; +} + +static void update_zones_wp(int fd, BlockZoneWps *wps, int64_t offset, + unsigned int nrz) { + if (get_zones_wp(fd, wps, offset, nrz) < 0) { + error_report("update zone wp failed"); + } +} +#endif + static void raw_refresh_limits(BlockDriverState *bs, Error **errp) { BDRVRawState *s =3D bs->opaque; @@ -1413,6 +1484,21 @@ static void raw_refresh_limits(BlockDriverState *bs,= Error **errp) if (ret >=3D 0) { bs->bl.max_active_zones =3D ret; } + + ret =3D get_sysfs_long_val(&st, "physical_block_size"); + if (ret >=3D 0) { + bs->bl.write_granularity =3D ret; + } + + bs->bl.wps =3D g_malloc(sizeof(BlockZoneWps) + + sizeof(int64_t) * bs->bl.nr_zones); + ret =3D get_zones_wp(s->fd, bs->bl.wps, 0, bs->bl.nr_zones); + if (ret < 0) { + error_setg_errno(errp, -ret, "report wps failed"); + g_free(bs->bl.wps); + return; + } + qemu_co_mutex_init(&bs->bl.wps->colock); return; } out: @@ -2338,9 +2424,15 @@ static int coroutine_fn raw_co_prw(BlockDriverState = *bs, uint64_t offset, { BDRVRawState *s =3D bs->opaque; RawPosixAIOData acb; + int ret; =20 if (fd_open(bs) < 0) return -EIO; +#if defined(CONFIG_BLKZONED) + if (bs->bl.wps) { + qemu_co_mutex_lock(&bs->bl.wps->colock); + } +#endif =20 /* * When using O_DIRECT, the request must be aligned to be able to use @@ -2354,14 +2446,16 @@ static int coroutine_fn raw_co_prw(BlockDriverState= *bs, uint64_t offset, } else if (s->use_linux_io_uring) { LuringState *aio =3D aio_get_linux_io_uring(bdrv_get_aio_context(b= s)); assert(qiov->size =3D=3D bytes); - return luring_co_submit(bs, aio, s->fd, offset, qiov, type); + ret =3D luring_co_submit(bs, aio, s->fd, offset, qiov, type); + goto out; #endif #ifdef CONFIG_LINUX_AIO } else if (s->use_linux_aio) { LinuxAioState *aio =3D aio_get_linux_aio(bdrv_get_aio_context(bs)); assert(qiov->size =3D=3D bytes); - return laio_co_submit(bs, aio, s->fd, offset, qiov, type, + ret =3D laio_co_submit(bs, aio, s->fd, offset, qiov, type, s->aio_max_batch); + goto out; #endif } =20 @@ -2378,7 +2472,32 @@ static int coroutine_fn raw_co_prw(BlockDriverState = *bs, uint64_t offset, }; =20 assert(qiov->size =3D=3D bytes); - return raw_thread_pool_submit(bs, handle_aiocb_rw, &acb); + ret =3D raw_thread_pool_submit(bs, handle_aiocb_rw, &acb); + +out: +#if defined(CONFIG_BLKZONED) + BlockZoneWps *wps =3D bs->bl.wps; + if (ret =3D=3D 0) { + if (type & QEMU_AIO_WRITE && wps && bs->bl.zone_size) { + int index =3D offset / bs->bl.zone_size; + if (!BDRV_ZT_IS_CONV(wps->wp[index])) { + /* Advance the wp if needed */ + if (offset + bytes > wps->wp[index]) { + wps->wp[index] =3D offset + bytes; + } + } + } + } else { + if (type & QEMU_AIO_WRITE) { + update_zones_wp(s->fd, bs->bl.wps, 0, 1); + } + } + + if (wps) { + qemu_co_mutex_unlock(&wps->colock); + } +#endif + return ret; } =20 static int coroutine_fn raw_co_preadv(BlockDriverState *bs, int64_t offset, @@ -2486,6 +2605,11 @@ static void raw_close(BlockDriverState *bs) BDRVRawState *s =3D bs->opaque; =20 if (s->fd >=3D 0) { +#if defined(CONFIG_BLKZONED) + if (bs->bl.wps) { + g_free(bs->bl.wps); + } +#endif qemu_close(s->fd); s->fd =3D -1; } @@ -3285,6 +3409,7 @@ static int coroutine_fn raw_co_zone_mgmt(BlockDriverS= tate *bs, BlockZoneOp op, const char *op_name; unsigned long zo; int ret; + BlockZoneWps *wps =3D bs->bl.wps; int64_t capacity =3D bs->total_sectors << BDRV_SECTOR_BITS; =20 zone_size =3D bs->bl.zone_size; @@ -3302,6 +3427,14 @@ static int coroutine_fn raw_co_zone_mgmt(BlockDriver= State *bs, BlockZoneOp op, return -EINVAL; } =20 + qemu_co_mutex_lock(&wps->colock); + uint32_t index =3D offset / bs->bl.zone_size; + if (BDRV_ZT_IS_CONV(wps->wp[index]) && len !=3D capacity) { + error_report("zone mgmt operations are not allowed for conventiona= l zones"); + ret =3D -EIO; + goto out; + } + switch (op) { case BLK_ZO_OPEN: op_name =3D "BLKOPENZONE"; @@ -3321,7 +3454,8 @@ static int coroutine_fn raw_co_zone_mgmt(BlockDriverS= tate *bs, BlockZoneOp op, break; default: error_report("Unsupported zone op: 0x%x", op); - return -ENOTSUP; + ret =3D -ENOTSUP; + goto out; } =20 acb =3D (RawPosixAIOData) { @@ -3339,10 +3473,27 @@ static int coroutine_fn raw_co_zone_mgmt(BlockDrive= rState *bs, BlockZoneOp op, len >> BDRV_SECTOR_BITS); ret =3D raw_thread_pool_submit(bs, handle_aiocb_zone_mgmt, &acb); if (ret !=3D 0) { + update_zones_wp(s->fd, wps, offset, index); ret =3D -errno; error_report("ioctl %s failed %d", op_name, ret); + goto out; } =20 + if (zo =3D=3D BLKRESETZONE && len =3D=3D capacity) { + for (int i =3D 0; i < bs->bl.nr_zones; ++i) { + if (!BDRV_ZT_IS_CONV(wps->wp[i])) { + wps->wp[i] =3D i * bs->bl.zone_size; + } + } + } else if (zo =3D=3D BLKRESETZONE) { + wps->wp[index] =3D offset; + } else if (zo =3D=3D BLKFINISHZONE) { + /* The zoned device allows the last zone smaller that the zone siz= e. */ + wps->wp[index] =3D offset + len; + } + +out: + qemu_co_mutex_unlock(&wps->colock); return ret; } #endif 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; =20 +/* + * 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) =20 +/* + * 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_BI= TS) diff --git a/include/block/block_int-common.h b/include/block/block_int-com= mon.h index 1bd2aef4d5..19915b34af 100644 --- a/include/block/block_int-common.h +++ b/include/block/block_int-common.h @@ -884,6 +884,9 @@ typedef struct BlockLimits { =20 /* maximum number of active zones */ int64_t max_active_zones; + + /* array of write pointers' location of each zone in the zoned device.= */ + BlockZoneWps *wps; } BlockLimits; =20 typedef struct BdrvOpBlocker BdrvOpBlocker; --=20 2.39.2