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GET /api/1.1/patches/2230298/?format=api
{ "id": 2230298, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2230298/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-ext4/patch/177747214327.4107228.3239123429130995999.stgit@frogsfrogsfrogs/", "project": { "id": 8, "url": "http://patchwork.ozlabs.org/api/1.1/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 }, "msgid": "<177747214327.4107228.3239123429130995999.stgit@frogsfrogsfrogs>", "date": "2026-04-29T14:52:37", "name": "[5/5] libext2fs: allow callers to disallow I/O to file data blocks", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "22c168078fe1c08587e2faa9c4c8dea26fb78f78", "submitter": { "id": 77032, "url": "http://patchwork.ozlabs.org/api/1.1/people/77032/?format=api", "name": "Darrick J. Wong", "email": "djwong@kernel.org" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-ext4/patch/177747214327.4107228.3239123429130995999.stgit@frogsfrogsfrogs/mbox/", "series": [ { "id": 502086, "url": "http://patchwork.ozlabs.org/api/1.1/series/502086/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-ext4/list/?series=502086", "date": "2026-04-29T14:51:35", "name": "[1/5] libext2fs: invalidate cached blocks when freeing them", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/502086/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2230298/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2230298/checks/", "tags": {}, "headers": { "Return-Path": "\n <SRS0=3GDI=C4=vger.kernel.org=linux-ext4+bounces-16189-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\tdkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=sYREVN6S;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=ozlabs.org\n (client-ip=150.107.74.76; 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a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1777474358; c=relaxed/simple;\n\tbh=d8YWgFo6RU7h+KnbJt1EGpteSqV25oyVcW8p2ugZDgo=;\n\th=Date:Subject:From:To:Cc:Message-ID:In-Reply-To:References:\n\t MIME-Version:Content-Type;\n b=C4XgNGLCUn/9vYJ4lZEjch6NkcmzirWTRZVly3fGml4+P0Yve+y8VuBXhJAJE4tUEsH8z8KiYRzeBSAkGejILTN4U5VyYqtqnKNLKk5U5mWaihfLOArwduHUE2cHOUqFc2WRjP/m+AI50lEjZrfQm4xbwbGiaBzFl7L6qglx/h8=" ], "ARC-Authentication-Results": [ "i=2; gandalf.ozlabs.org;\n dmarc=pass (p=quarantine dis=none) header.from=kernel.org;\n dkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=sYREVN6S; dkim-atps=neutral;\n spf=pass (client-ip=2600:3c09:e001:a7::12fc:5321; helo=sto.lore.kernel.org;\n envelope-from=linux-ext4+bounces-16189-patchwork-incoming=ozlabs.org@vger.kernel.org;\n receiver=ozlabs.org) smtp.mailfrom=vger.kernel.org", "i=1; smtp.subspace.kernel.org;\n dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org\n header.b=sYREVN6S; arc=none smtp.client-ip=10.30.226.201" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org;\n\ts=k20201202; t=1777474358;\n\tbh=d8YWgFo6RU7h+KnbJt1EGpteSqV25oyVcW8p2ugZDgo=;\n\th=Date:Subject:From:To:Cc:In-Reply-To:References:From;\n\tb=sYREVN6SyYuO7Lsqv3M0OlFkMXvPeXz2YP9bB3r7J0ltI+uBIPB2/ard6igC0/8VI\n\t /zxC/9Tj+Y3WUGvHRpBiath9f1LdqdlySi6FQLpAtcxoi8TYJwmGoOY+sHbEIl8c00\n\t 4+eVLsnF9bchhRCmds1eQA1X0XPvUim1jcfoIaZL3kzNZbOe/RE2xHGKYk55gYikbL\n\t qoS8WejX7KSGdoCtWQREORUbJ44ob9LrBoasZTsb15/kRBLTbUEqVEm6U966KbHwkR\n\t STk2iL62d3hELIbYFPk/ibu6IbSR2oi3RX7/kABCcueUbZga0eAntgrEGdHf40D7VQ\n\t QSVEIuhG/FvBg==", "Date": "Wed, 29 Apr 2026 07:52:37 -0700", "Subject": "[PATCH 5/5] libext2fs: allow callers to disallow I/O to file data\n blocks", "From": "\"Darrick J. Wong\" <djwong@kernel.org>", "To": "tytso@mit.edu", "Cc": "bernd@bsbernd.com, miklos@szeredi.hu, linux-ext4@vger.kernel.org,\n neal@gompa.dev, linux-fsdevel@vger.kernel.org, fuse-devel@lists.linux.dev,\n joannelkoong@gmail.com", "Message-ID": "<177747214327.4107228.3239123429130995999.stgit@frogsfrogsfrogs>", "In-Reply-To": "<177747214224.4107228.16300103064218258692.stgit@frogsfrogsfrogs>", "References": "<177747214224.4107228.16300103064218258692.stgit@frogsfrogsfrogs>", "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-Type": "text/plain; charset=\"utf-8\"", "Content-Transfer-Encoding": "7bit", "X-Spam-Status": "No, score=-1.2 required=5.0 tests=ARC_SIGNED,ARC_VALID,\n\tDKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DMARC_PASS,\n\tMAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=disabled\n\tversion=4.0.1", "X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on gandalf.ozlabs.org" }, "content": "From: Darrick J. Wong <djwong@kernel.org>\n\nAdd a flag to ext2_file_t to disallow read and write I/O to file data\nblocks. This supports fuse2fs iomap support, which will keep all the\nfile data I/O inside the kerne.\n\nSigned-off-by: \"Darrick J. Wong\" <djwong@kernel.org>\n---\n lib/ext2fs/ext2fs.h | 3 +++\n lib/ext2fs/fileio.c | 12 +++++++++++-\n 2 files changed, 14 insertions(+), 1 deletion(-)", "diff": "diff --git a/lib/ext2fs/ext2fs.h b/lib/ext2fs/ext2fs.h\nindex 8fad4c4011dd5a..23b0695a32d150 100644\n--- a/lib/ext2fs/ext2fs.h\n+++ b/lib/ext2fs/ext2fs.h\n@@ -178,6 +178,9 @@ typedef struct ext2_struct_dblist *ext2_dblist;\n #define EXT2_FILE_WRITE\t\t0x0001\n #define EXT2_FILE_CREATE\t0x0002\n \n+/* no file I/O to disk blocks, only to inline data */\n+#define EXT2_FILE_NOBLOCKIO\t0x0004\n+\n #define EXT2_FILE_MASK\t\t0x00FF\n \n #define EXT2_FILE_BUF_DIRTY\t0x4000\ndiff --git a/lib/ext2fs/fileio.c b/lib/ext2fs/fileio.c\nindex 3a36e9e7fff43b..95ee45ec7371ae 100644\n--- a/lib/ext2fs/fileio.c\n+++ b/lib/ext2fs/fileio.c\n@@ -314,6 +314,11 @@ errcode_t ext2fs_file_read(ext2_file_t file, void *buf,\n \tif (file->inode.i_flags & EXT4_INLINE_DATA_FL)\n \t\treturn ext2fs_file_read_inline_data(file, buf, wanted, got);\n \n+\tif (file->flags & EXT2_FILE_NOBLOCKIO) {\n+\t\tretval = EXT2_ET_OP_NOT_SUPPORTED;\n+\t\tgoto fail;\n+\t}\n+\n \twhile ((file->pos < EXT2_I_SIZE(&file->inode)) && (wanted > 0)) {\n \t\tretval = sync_buffer_position(file);\n \t\tif (retval)\n@@ -441,6 +446,11 @@ errcode_t ext2fs_file_write(ext2_file_t file, const void *buf,\n \t\tretval = 0;\n \t}\n \n+\tif (file->flags & EXT2_FILE_NOBLOCKIO) {\n+\t\tretval = EXT2_ET_OP_NOT_SUPPORTED;\n+\t\tgoto fail;\n+\t}\n+\n \twhile (nbytes > 0) {\n \t\tretval = sync_buffer_position(file);\n \t\tif (retval)\n@@ -609,7 +619,7 @@ static errcode_t ext2fs_file_zero_past_offset(ext2_file_t file,\n \tint ret_flags;\n \terrcode_t retval;\n \n-\tif (off == 0)\n+\tif (off == 0 || (file->flags & EXT2_FILE_NOBLOCKIO))\n \t\treturn 0;\n \n \tretval = sync_buffer_position(file);\n", "prefixes": [ "5/5" ] }