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GET /api/patches/2215722/?format=api
{ "id": 2215722, "url": "http://patchwork.ozlabs.org/api/patches/2215722/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-ext4/patch/20260325072850.3997161-3-yi.zhang@huaweicloud.com/", "project": { "id": 8, "url": "http://patchwork.ozlabs.org/api/projects/8/?format=api", "name": "Linux ext4 filesystem development", "link_name": "linux-ext4", "list_id": "linux-ext4.vger.kernel.org", "list_email": "linux-ext4@vger.kernel.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260325072850.3997161-3-yi.zhang@huaweicloud.com>", "list_archive_url": null, "date": "2026-03-25T07:28:41", "name": "[v2,02/10] ext4: ext4_block_truncate_page() returns zeroed length on success", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": false, "hash": "2dd9edab9c055a9a951d983f3b490a8f8c476e1a", "submitter": { "id": 85428, "url": "http://patchwork.ozlabs.org/api/people/85428/?format=api", "name": "Zhang Yi", "email": "yi.zhang@huaweicloud.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-ext4/patch/20260325072850.3997161-3-yi.zhang@huaweicloud.com/mbox/", "series": [ { "id": 497391, "url": "http://patchwork.ozlabs.org/api/series/497391/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-ext4/list/?series=497391", "date": "2026-03-25T07:28:44", "name": "ext4: refactor partial block zero-out for iomap conversion", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/497391/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2215722/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2215722/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <SRS0=ue4y=BZ=vger.kernel.org=linux-ext4+bounces-15330-patchwork-incoming=ozlabs.org@ozlabs.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linux-ext4@vger.kernel.org" ], "Delivered-To": [ "patchwork-incoming@legolas.ozlabs.org", "patchwork-incoming@ozlabs.org" ], "Authentication-Results": [ "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=ozlabs.org\n (client-ip=2404:9400:2221:ea00::3; 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a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1774424028; c=relaxed/simple;\n\tbh=KKd39nSq2/Q+ECUd1egjak+o/qKi+d5in9fXewxY3bc=;\n\th=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References:\n\t MIME-Version;\n b=kQzHJrPcr/RSQpn7PgKZ1uF5Nbg2AT48RpTbP+BmvkrINhLxZMX3G95/RyLOnPMIhADVRfPopu9QXgSB1Hr5UQ+1C/qDVuR4oiLYWxeExyiMk3t3nIk2sy1gqtEbV5z9j2puaVxz3JmQJMJhb1jotvUDlVfNW9pht79b3Y6lqe0=" ], "ARC-Authentication-Results": [ "i=2; gandalf.ozlabs.org;\n dmarc=none (p=none dis=none) header.from=huaweicloud.com;\n spf=pass (client-ip=172.234.253.10; helo=sea.lore.kernel.org;\n envelope-from=linux-ext4+bounces-15330-patchwork-incoming=ozlabs.org@vger.kernel.org;\n receiver=ozlabs.org) smtp.mailfrom=vger.kernel.org", "i=1; smtp.subspace.kernel.org;\n dmarc=none (p=none dis=none) header.from=huaweicloud.com;\n spf=pass smtp.mailfrom=huaweicloud.com; arc=none smtp.client-ip=45.249.212.56" ], "From": "Zhang Yi <yi.zhang@huaweicloud.com>", "To": "linux-ext4@vger.kernel.org", "Cc": "linux-fsdevel@vger.kernel.org,\n\tlinux-kernel@vger.kernel.org,\n\ttytso@mit.edu,\n\tadilger.kernel@dilger.ca,\n\tjack@suse.cz,\n\tojaswin@linux.ibm.com,\n\tritesh.list@gmail.com,\n\tlibaokun@linux.alibaba.com,\n\tyi.zhang@huawei.com,\n\tyi.zhang@huaweicloud.com,\n\tyizhang089@gmail.com,\n\tyangerkun@huawei.com,\n\tyukuai@fnnas.com", "Subject": "[PATCH v2 02/10] ext4: ext4_block_truncate_page() returns zeroed\n length on success", "Date": "Wed, 25 Mar 2026 15:28:41 +0800", "Message-ID": "<20260325072850.3997161-3-yi.zhang@huaweicloud.com>", "X-Mailer": "git-send-email 2.52.0", "In-Reply-To": "<20260325072850.3997161-1-yi.zhang@huaweicloud.com>", "References": "<20260325072850.3997161-1-yi.zhang@huaweicloud.com>", "Precedence": "bulk", "X-Mailing-List": "linux-ext4@vger.kernel.org", "List-Id": "<linux-ext4.vger.kernel.org>", "List-Subscribe": "<mailto:linux-ext4+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:linux-ext4+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-CM-TRANSID": "cCh0CgAHC9vFj8NpuR6cCA--.49898S6", "X-Coremail-Antispam": "1UD129KBjvJXoWxJrWrXFW3Jw4xWFyUWF1xZrb_yoW8AFykpr\n\t98K3yrGr4Dua4q9an29F1aqr1ak3WfGFW8Way7K34Y934fXF1xKF93KF1Fva1jqrWxXayj\n\tqF45tFWa9w17A3DanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2\n\t9KBjDU0xBIdaVrnRJUUUm014x267AKxVWrJVCq3wAFc2x0x2IEx4CE42xK8VAvwI8IcIk0\n\trVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_Jryl82xGYIkIc2\n\tx26xkF7I0E14v26ryj6s0DM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2z4x0\n\tY4vE2Ix0cI8IcVAFwI0_tr0E3s1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F4UJw\n\tA2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oVCq3wAS\n\t0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7IYx2\n\tIY67AKxVWUGVWUXwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0\n\tY48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwACI402YVCY1x02628vn2kIc2\n\txKxwCY1x0262kKe7AKxVWUtVW8ZwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWU\n\tJVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67\n\tkF1VAFwI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY\n\t6xIIjxv20xvEc7CjxVAFwI0_Gr0_Cr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0x\n\tvEx4A2jsIE14v26r1j6r4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVj\n\tvjDU0xZFpf9x0JUADGOUUUUU=", "X-CM-SenderInfo": "d1lo6xhdqjqx5xdzvxpfor3voofrz/", "X-Spam-Status": "No, score=-1.1 required=5.0 tests=ARC_SIGNED,ARC_VALID,\n\tDMARC_MISSING,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,\n\tSPF_HELO_NONE,SPF_PASS autolearn=disabled version=4.0.1", "X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on gandalf.ozlabs.org" }, "content": "From: Zhang Yi <yi.zhang@huawei.com>\n\nReturn the actual zeroed length instead of 0 on success. This prepares\nfor the upcoming iomap buffered I/O conversion by exposing zeroed length\ninformation to callers.\n\nSigned-off-by: Zhang Yi <yi.zhang@huawei.com>\nReviewed-by: Jan Kara <jack@suse.cz>\n---\n fs/ext4/inode.c | 10 +++++++++-\n 1 file changed, 9 insertions(+), 1 deletion(-)", "diff": "diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c\nindex 1c9474d5d11d..f21be26b4642 100644\n--- a/fs/ext4/inode.c\n+++ b/fs/ext4/inode.c\n@@ -4136,6 +4136,7 @@ static int ext4_block_zero_page_range(handle_t *handle,\n * up to the end of the block which corresponds to `from'.\n * This required during truncate. We need to physically zero the tail end\n * of that block so it doesn't yield old data if the file is later grown.\n+ * Return the zeroed length on success.\n */\n static int ext4_block_truncate_page(handle_t *handle,\n \t\tstruct address_space *mapping, loff_t from)\n@@ -4143,6 +4144,8 @@ static int ext4_block_truncate_page(handle_t *handle,\n \tunsigned length;\n \tunsigned blocksize;\n \tstruct inode *inode = mapping->host;\n+\tbool did_zero = false;\n+\tint err;\n \n \t/* If we are processing an encrypted inode during orphan list handling */\n \tif (IS_ENCRYPTED(inode) && !fscrypt_has_encryption_key(inode))\n@@ -4151,7 +4154,12 @@ static int ext4_block_truncate_page(handle_t *handle,\n \tblocksize = i_blocksize(inode);\n \tlength = blocksize - (from & (blocksize - 1));\n \n-\treturn ext4_block_zero_page_range(handle, mapping, from, length, NULL);\n+\terr = ext4_block_zero_page_range(handle, mapping, from, length,\n+\t\t\t\t\t &did_zero);\n+\tif (err)\n+\t\treturn err;\n+\n+\treturn did_zero ? length : 0;\n }\n \n int ext4_zero_partial_blocks(handle_t *handle, struct inode *inode,\n", "prefixes": [ "v2", "02/10" ] }