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charset="utf-8" This commit adds Zoned Device Model as defined in T10 ZBC and T13 ZAC standards, along with some useful accessor functions. Since the default value of zero in the zoned model field corresponds to a regular (non-zoned) block device, there is no functionality change with this commit. Signed-off-by: Dmitry Fomichev --- block.c | 14 ++++++++++++++ block/block-backend.c | 20 ++++++++++++++++++++ include/block/block.h | 9 +++++++++ include/block/block_int.h | 4 ++++ include/sysemu/block-backend.h | 2 ++ 5 files changed, 49 insertions(+) diff --git a/block.c b/block.c index c139540f2b..396d999f00 100644 --- a/block.c +++ b/block.c @@ -4649,6 +4649,20 @@ void bdrv_get_geometry(BlockDriverState *bs, uint64_= t *nb_sectors_ptr) *nb_sectors_ptr =3D nb_sectors < 0 ? 0 : nb_sectors; } =20 +uint8_t bdrv_get_zoned_model(BlockDriverState *bs) +{ + if (bs->drv->bdrv_get_zoned_info) { + bs->drv->bdrv_get_zoned_info(bs); + } + + return bs->bl.zoned_model; +} + +uint8_t bdrv_is_zoned(BlockDriverState *bs) +{ + return bdrv_get_zoned_model(bs) !=3D BLK_ZONED_NONE; +} + bool bdrv_is_sg(BlockDriverState *bs) { return bs->sg; diff --git a/block/block-backend.c b/block/block-backend.c index a8d160fd5d..34723f3655 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -1438,6 +1438,15 @@ int64_t blk_nb_sectors(BlockBackend *blk) return bdrv_nb_sectors(blk_bs(blk)); } =20 +uint8_t blk_get_zoned_model(BlockBackend *blk) +{ + if (!blk_is_available(blk)) { + return BLK_ZONED_NONE; + } + + return bdrv_get_zoned_model(blk_bs(blk)); +} + BlockAIOCB *blk_aio_preadv(BlockBackend *blk, int64_t offset, QEMUIOVector *qiov, BdrvRequestFlags flags, BlockCompletionFunc *cb, void *opaque) @@ -1705,6 +1714,17 @@ bool blk_is_sg(BlockBackend *blk) return bdrv_is_sg(bs); } =20 +bool blk_is_zoned(BlockBackend *blk) +{ + BlockDriverState *bs =3D blk_bs(blk); + + if (!bs) { + return false; + } + + return bdrv_is_zoned(bs); +} + bool blk_enable_write_cache(BlockBackend *blk) { return blk->enable_write_cache; diff --git a/include/block/block.h b/include/block/block.h index 734c9d2f76..7aa096afcc 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -278,6 +278,13 @@ enum { =20 char *bdrv_perm_names(uint64_t perm); =20 +/* Known zoned device models */ +enum blk_zoned_model { + BLK_ZONED_NONE, /* Regular block device */ + BLK_ZONED_HA, /* Host-aware zoned block device */ + BLK_ZONED_HM, /* Host-managed zoned block device */ +}; + /* disk I/O throttling */ void bdrv_init(void); void bdrv_init_with_whitelist(void); @@ -354,6 +361,8 @@ int64_t bdrv_get_allocated_file_size(BlockDriverState *= bs); BlockMeasureInfo *bdrv_measure(BlockDriver *drv, QemuOpts *opts, BlockDriverState *in_bs, Error **errp); void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr); +uint8_t bdrv_get_zoned_model(BlockDriverState *bs); +uint8_t bdrv_is_zoned(BlockDriverState *bs); void bdrv_refresh_limits(BlockDriverState *bs, Error **errp); int bdrv_commit(BlockDriverState *bs); int bdrv_change_backing_file(BlockDriverState *bs, diff --git a/include/block/block_int.h b/include/block/block_int.h index d6415b53c1..8f35591803 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -416,6 +416,7 @@ struct BlockDriver { bool (*bdrv_debug_is_suspended)(BlockDriverState *bs, const char *tag); =20 void (*bdrv_refresh_limits)(BlockDriverState *bs, Error **errp); + void (*bdrv_get_zoned_info)(BlockDriverState *bs); =20 /* * Returns 1 if newly created images are guaranteed to contain only @@ -614,6 +615,9 @@ typedef struct BlockLimits { =20 /* maximum number of iovec elements */ int max_iov; + + /* Zoned device model. Zero value indicates a regular block device */ + uint8_t zoned_model; } BlockLimits; =20 typedef struct BdrvOpBlocker BdrvOpBlocker; diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h index 733c4957eb..65b6341218 100644 --- a/include/sysemu/block-backend.h +++ b/include/sysemu/block-backend.h @@ -156,6 +156,7 @@ int blk_pwrite(BlockBackend *blk, int64_t offset, const= void *buf, int bytes, int64_t blk_getlength(BlockBackend *blk); void blk_get_geometry(BlockBackend *blk, uint64_t *nb_sectors_ptr); int64_t blk_nb_sectors(BlockBackend *blk); +uint8_t blk_get_zoned_model(BlockBackend *blk); BlockAIOCB *blk_aio_preadv(BlockBackend *blk, int64_t offset, QEMUIOVector *qiov, BdrvRequestFlags flags, BlockCompletionFunc *cb, void *opaque); @@ -189,6 +190,7 @@ void blk_error_action(BlockBackend *blk, BlockErrorActi= on action, bool is_read, int error); bool blk_is_read_only(BlockBackend *blk); bool blk_is_sg(BlockBackend *blk); +bool blk_is_zoned(BlockBackend *blk); bool blk_enable_write_cache(BlockBackend *blk); void blk_set_enable_write_cache(BlockBackend *blk, bool wce); void blk_invalidate_cache(BlockBackend *blk, Error **errp); --=20 2.21.0 From nobody Fri May 17 19:37:54 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.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; Authentication-Results: mx.zohomail.com; dkim=fail header.i=@wdc.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=wdc.com ARC-Seal: i=1; a=rsa-sha256; t=1562705189; cv=none; d=zoho.com; s=zohoarc; b=FDH7qb8Pqq79wV0kEQrlqNX01RbS8V+gcZMLa3Tlq8XZYMPpxCgDBTnFbA1lsOQ3/8O3e+tWWbmq5FxPNplKBMYQPwDoGmt8IpsBZuOy6HmNP/rom0fWdXAxhRI9IyBsqjLjVOy7ekymMs2I7aQ8QQX59orfcpuch+jA0Od3Xcg= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; 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charset="utf-8" The purpose of this patch is to recognize a zoned block device (ZBD) when it is opened as a raw file. The new code initializes the zoned model propery introduced by the previous commit. This commit is Linux-specific and in essence it checks the Zoned Block Device Model (None/Host-managed/Host-aware) value in sysfs on the host. In order to avoid code duplication in file-posix.c, a common helper function is added to read value of a sysfs entry under /sys/block//queue. Now, the existing function that reads the "max_segments" value and the the new function that reads "zoned" value share the same helper code. Signed-off-by: Dmitry Fomichev --- block/file-posix.c | 69 ++++++++++++++++++++++++++++++++++++++-------- block/raw-format.c | 8 ++++++ 2 files changed, 66 insertions(+), 11 deletions(-) diff --git a/block/file-posix.c b/block/file-posix.c index ab05b51a66..dd81dc3301 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -1055,33 +1055,53 @@ static int hdev_get_max_transfer_length(BlockDriver= State *bs, int fd) #endif } =20 -static int hdev_get_max_segments(const struct stat *st) +static int hdev_read_blk_queue_entry(const struct stat *st, const char *ke= y, + char *buf, int buf_len) { #ifdef CONFIG_LINUX - char buf[32]; - const char *end; char *sysfspath; int ret; int fd =3D -1; - long max_segments; =20 - sysfspath =3D g_strdup_printf("/sys/dev/block/%u:%u/queue/max_segments= ", - major(st->st_rdev), minor(st->st_rdev)); + sysfspath =3D g_strdup_printf("/sys/dev/block/%u:%u/queue/%s", + major(st->st_rdev), minor(st->st_rdev), ke= y); fd =3D open(sysfspath, O_RDONLY); if (fd =3D=3D -1) { ret =3D -errno; goto out; } do { - ret =3D read(fd, buf, sizeof(buf) - 1); + ret =3D read(fd, buf, buf_len - 1); } while (ret =3D=3D -1 && errno =3D=3D EINTR); if (ret < 0) { ret =3D -errno; - goto out; } else if (ret =3D=3D 0) { ret =3D -EIO; + } +out: + if (fd !=3D -1) { + close(fd); + } + g_free(sysfspath); + return ret; +#else + return -ENOTSUP; +#endif +} + +static int hdev_get_max_segments(const struct stat *st) +{ +#ifdef CONFIG_LINUX + char buf[32]; + const char *end; + int ret; + long max_segments; + + ret =3D hdev_read_blk_queue_entry(st, "max_segments", buf, sizeof(buf)= ); + if (ret < 0) { goto out; } + buf[ret] =3D 0; /* The file is ended with '\n', pass 'end' to accept that. */ ret =3D qemu_strtol(buf, &end, 10, &max_segments); @@ -1090,10 +1110,33 @@ static int hdev_get_max_segments(const struct stat = *st) } =20 out: - if (fd !=3D -1) { - close(fd); + return ret; +#else + return -ENOTSUP; +#endif +} + +static int hdev_get_zoned_model(const struct stat *st) +{ +#ifdef CONFIG_LINUX + char buf[32]; + int ret; + + ret =3D hdev_read_blk_queue_entry(st, "zoned", buf, sizeof(buf)); + if (ret < 0) { + ret =3D BLK_ZONED_NONE; + goto out; } - g_free(sysfspath); + + buf[ret - 1] =3D 0; + ret =3D BLK_ZONED_NONE; + if (strcmp(buf, "host-managed") =3D=3D 0) { + ret =3D BLK_ZONED_HM; + } else if (strcmp(buf, "host-aware") =3D=3D 0) { + ret =3D BLK_ZONED_HA; + } + +out: return ret; #else return -ENOTSUP; @@ -1116,6 +1159,10 @@ static void raw_refresh_limits(BlockDriverState *bs,= Error **errp) bs->bl.max_transfer =3D MIN(bs->bl.max_transfer, ret * getpagesize()); } + ret =3D hdev_get_zoned_model(&st); + if (ret >=3D 0) { + bs->bl.zoned_model =3D ret; + } } } =20 diff --git a/block/raw-format.c b/block/raw-format.c index bffd424dd0..12c2a3f95d 100644 --- a/block/raw-format.c +++ b/block/raw-format.c @@ -369,6 +369,13 @@ static void raw_refresh_limits(BlockDriverState *bs, E= rror **errp) } } =20 +static void raw_get_zoned_info(BlockDriverState *bs) +{ + if (!bs->probed) { + bs->bl.zoned_model =3D bs->file->bs->bl.zoned_model; + } +} + static int coroutine_fn raw_co_truncate(BlockDriverState *bs, int64_t offs= et, PreallocMode prealloc, Error **err= p) { @@ -572,6 +579,7 @@ BlockDriver bdrv_raw =3D { .bdrv_co_ioctl =3D &raw_co_ioctl, .create_opts =3D &raw_create_opts, .bdrv_has_zero_init =3D &raw_has_zero_init, + .bdrv_get_zoned_info =3D &raw_get_zoned_info, .strong_runtime_opts =3D raw_strong_runtime_opts, .mutable_opts =3D mutable_opts, }; --=20 2.21.0 From nobody Fri May 17 19:37:54 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.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; Authentication-Results: mx.zohomail.com; dkim=fail header.i=@wdc.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=wdc.com ARC-Seal: i=1; a=rsa-sha256; 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charset="utf-8" Prevent virtio-blk code from attaching a zoned block device because it will otherwise appear as a reqular block device at the guest and that will most certainly cause problems. The functionality to support ZBDs via virtio-blk should be pretty useful and there are some attempts underway to get it implemented, but such work will inevitably lead to some modifications in virtio protocol spec. Therefore, this activity is considered a more long-term effort. So for now, we just don't allow zoned block devices to work via virtio-blk. Signed-off-by: Dmitry Fomichev --- hw/block/virtio-blk.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c index cbb3729158..c11e028308 100644 --- a/hw/block/virtio-blk.c +++ b/hw/block/virtio-blk.c @@ -1140,6 +1140,11 @@ static void virtio_blk_device_realize(DeviceState *d= ev, Error **errp) return; } =20 + if (blk_is_zoned(conf->conf.blk)) { + error_setg(errp, "zoned block devices are not supported"); + return; + } + if (virtio_has_feature(s->host_features, VIRTIO_BLK_F_DISCARD) && (!conf->max_discard_sectors || conf->max_discard_sectors > BDRV_REQUEST_MAX_SECTORS)) { --=20 2.21.0 From nobody Fri May 17 19:37:54 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.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; Authentication-Results: mx.zohomail.com; dkim=fail header.i=@wdc.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; 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d="scan'208";a="212488455" IronPort-SDR: YnjMF3amshJBXEm7cdBbDV8BK40nA14C4ZWpIbby4ErTrB1spYm861siMDElG/3yf4An06xhBy eqv9+vKFB9xgey6836ILelnvQb6Xa4cmCo1FKWki5oXkmLo/yNdfKXRend/PrquwUrFVtYCUGf io0rkdziP5LYW73yBgGIUYihOOlMJPfDN3quau3+tlo0DCjNlEgS3rjuHytlImX5UZ0+e4RPGC +RAi23i0XCTrw7h+B/L0vH9q8Fs/pzB0Aqf9o+gqyR7v6geVjXuPh4uzx4kB+PbBRJs7fNxZH/ pwM822F6aN+bPxLGlnZCD5vF IronPort-SDR: LMEA0a0Q09Wv3PN7GtMAPOAKDzRUwdngM/IgoSNM9Rxii8d4dNumYVkxdW72JNti7G/xP0/s0a ZI9z2/JO1ioMXRkLR3XlrTJqtlzDzs8LjkDuY1wgyZyRRjzJ0L27iMQgBUFIwNppaDpczBGqhA EaWp5RJGcrtYzVCY4YNJPTFLP0ZlqlQGhgIXmP98aIsrcwxQAWk/4mfDjzKlSkGc4TNrDAmdm5 3J3uKOd7U4HFAr9kgXRCBZbwbMNLHaqUPoN4bfVcXy278rZHJIH1LKXaNpYXupE/AUOIen2cNe WH0= From: Dmitry Fomichev To: kwolf@redhat.com, mreitz@redhat.com, mst@redhat.com, stefanha@redhat.com, pbonzini@redhat.com, fam@euphon.net, qemu-block@nongnu.org, qemu-devel@nongnu.org Date: Tue, 9 Jul 2019 16:38:06 -0400 Message-Id: <20190709203806.17550-5-dmitry.fomichev@wdc.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190709203806.17550-1-dmitry.fomichev@wdc.com> References: <20190709203806.17550-1-dmitry.fomichev@wdc.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: FreeBSD 9.x X-Received-From: 68.232.143.124 Subject: [Qemu-devel] [PATCH 4/4] hw/scsi: Don't realize zoned block devices for virtio-scsi legacy drivers 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: Shin'ichiro Kawasaki Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" From: Shin'ichiro Kawasaki Prevent scsi-hd and scsi-disk drivers from attaching a zoned block device because it will appear as a regular block device at the guest and will most certainly cause problems. The functionality to support ZBDs is not planned for scsi-hd and scsi-disk legacy drivers. It is supported via scsi-generic driver already and discussion is ongoing for scsi-block driver. Signed-off-by: Shin'ichiro Kawasaki --- hw/scsi/scsi-disk.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c index ed7295bfd7..80682a61fb 100644 --- a/hw/scsi/scsi-disk.c +++ b/hw/scsi/scsi-disk.c @@ -2401,6 +2401,11 @@ static void scsi_hd_realize(SCSIDevice *dev, Error *= *errp) * backend will be issued in scsi_realize */ if (s->qdev.conf.blk) { + if (blk_is_zoned(s->qdev.conf.blk)) { + error_setg(errp, "zoned block devices are not supported"); + return; + } + ctx =3D blk_get_aio_context(s->qdev.conf.blk); aio_context_acquire(ctx); blkconf_blocksizes(&s->qdev.conf); --=20 2.21.0