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([106.84.130.185]) by smtp.gmail.com with ESMTPSA id u4-20020a170902b28400b001a06b33923bsm13722350plr.164.2023.03.24.02.06.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 24 Mar 2023 02:06:47 -0700 (PDT) From: Sam Li To: qemu-devel@nongnu.org Cc: stefanha@redhat.com, =?utf-8?q?Marc-Andr=C3=A9_Lureau?= , Kevin Wolf , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Fam Zheng , Hanna Reitz , Thomas Huth , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , Paolo Bonzini , hare@suse.de, damien.lemoal@opensource.wdc.com, dmitry.fomichev@wdc.com, qemu-block@nongnu.org, Sam Li Subject: [PATCH v18 5/8] config: add check to block layer Date: Fri, 24 Mar 2023 17:06:02 +0800 Message-Id: <20230324090605.28361-6-faithilikerun@gmail.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230324090605.28361-1-faithilikerun@gmail.com> References: <20230324090605.28361-1-faithilikerun@gmail.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::e31; envelope-from=faithilikerun@gmail.com; helo=mail-vs1-xe31.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+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Putting zoned/non-zoned BlockDrivers on top of each other is not allowed. Signed-off-by: Sam Li Reviewed-by: Stefan Hajnoczi Reviewed-by: Hannes Reinecke Reviewed-by: Dmitry Fomichev --- block.c | 19 +++++++++++++++++++ block/file-posix.c | 12 ++++++++++++ block/raw-format.c | 1 + include/block/block_int-common.h | 5 +++++ 4 files changed, 37 insertions(+) diff --git a/block.c b/block.c index 0dd604d0f6..4ebf7bbc90 100644 --- a/block.c +++ b/block.c @@ -7953,6 +7953,25 @@ void bdrv_add_child(BlockDriverState *parent_bs, BlockDriverState *child_bs, return; } + /* + * Non-zoned block drivers do not follow zoned storage constraints + * (i.e. sequential writes to zones). Refuse mixing zoned and non-zoned + * drivers in a graph. + */ + if (!parent_bs->drv->supports_zoned_children && + child_bs->bl.zoned == BLK_Z_HM) { + /* + * The host-aware model allows zoned storage constraints and random + * write. Allow mixing host-aware and non-zoned drivers. Using + * host-aware device as a regular device. + */ + error_setg(errp, "Cannot add a %s child to a %s parent", + child_bs->bl.zoned == BLK_Z_HM ? "zoned" : "non-zoned", + parent_bs->drv->supports_zoned_children ? + "support zoned children" : "not support zoned children"); + return; + } + if (!QLIST_EMPTY(&child_bs->parents)) { error_setg(errp, "The node %s already has a parent", child_bs->node_name); diff --git a/block/file-posix.c b/block/file-posix.c index 0c19cfb5cc..5fa80933c9 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -776,6 +776,18 @@ static int raw_open_common(BlockDriverState *bs, QDict *options, goto fail; } } +#ifdef CONFIG_BLKZONED + /* + * The kernel page cache does not reliably work for writes to SWR zones + * of zoned block device because it can not guarantee the order of writes. + */ + if ((bs->bl.zoned != BLK_Z_NONE) && + (!(s->open_flags & O_DIRECT))) { + error_setg(errp, "The driver supports zoned devices, and it requires " + "cache.direct=on, which was not specified."); + return -EINVAL; /* No host kernel page cache */ + } +#endif if (S_ISBLK(st.st_mode)) { #ifdef __linux__ diff --git a/block/raw-format.c b/block/raw-format.c index 6e1b9394c8..72e23e7b55 100644 --- a/block/raw-format.c +++ b/block/raw-format.c @@ -621,6 +621,7 @@ static void raw_child_perm(BlockDriverState *bs, BdrvChild *c, BlockDriver bdrv_raw = { .format_name = "raw", .instance_size = sizeof(BDRVRawState), + .supports_zoned_children = true, .bdrv_probe = &raw_probe, .bdrv_reopen_prepare = &raw_reopen_prepare, .bdrv_reopen_commit = &raw_reopen_commit, diff --git a/include/block/block_int-common.h b/include/block/block_int-common.h index a3efb385e0..1bd2aef4d5 100644 --- a/include/block/block_int-common.h +++ b/include/block/block_int-common.h @@ -137,6 +137,11 @@ struct BlockDriver { */ bool is_format; + /* + * Set to true if the BlockDriver supports zoned children. + */ + bool supports_zoned_children; + /* * Drivers not implementing bdrv_parse_filename nor bdrv_open should have * this field set to true, except ones that are defined only by their