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GET /api/patches/2218300/?format=api
{ "id": 2218300, "url": "http://patchwork.ozlabs.org/api/patches/2218300/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-ext4/patch/20260331212827.2631020-10-aalbersh@kernel.org/", "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": "<20260331212827.2631020-10-aalbersh@kernel.org>", "list_archive_url": null, "date": "2026-03-31T21:28:10", "name": "[v6,09/22] xfs: introduce fsverity on-disk changes", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "86d5bbbce1ef17fc116bc4f28bae72a704cabca7", "submitter": { "id": 92821, "url": "http://patchwork.ozlabs.org/api/people/92821/?format=api", "name": "Andrey Albershteyn", "email": "aalbersh@kernel.org" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-ext4/patch/20260331212827.2631020-10-aalbersh@kernel.org/mbox/", "series": [ { "id": 498255, "url": "http://patchwork.ozlabs.org/api/series/498255/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-ext4/list/?series=498255", "date": "2026-03-31T21:28:01", "name": "fs-verity support for XFS with post EOF merkle tree", "version": 6, "mbox": "http://patchwork.ozlabs.org/series/498255/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2218300/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2218300/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <SRS0=/QRt=B7=vger.kernel.org=linux-ext4+bounces-15556-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=Q1OmVbaF;\n\tdkim-atps=neutral", "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=1774992542; c=relaxed/simple;\n\tbh=RZTePcZL49YR0MAouenDsHNhMRyMiw3LC4VY3V7qjps=;\n\th=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References:\n\t MIME-Version:Content-Type;\n b=h14vBmm7TFWd9opmGpHiHmaQ28R6imZzUk0MczoD/qqNNJLb7LsNJ93Umtqj2FSpxWJyQ184FAGQK7nwkHyU/e5VzTTnrrTHDZH/EOOpqmUxFDZlgogcq0ExvmDr11M9RRvLW50a6NYSL6xsTOL62uCFpctOPpxEZ2VbE3XgCcw=" ], "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=Q1OmVbaF; dkim-atps=neutral;\n spf=pass (client-ip=2600:3c15:e001:75::12fc:5321; helo=sin.lore.kernel.org;\n envelope-from=linux-ext4+bounces-15556-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=Q1OmVbaF; 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=1774992542;\n\tbh=RZTePcZL49YR0MAouenDsHNhMRyMiw3LC4VY3V7qjps=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=Q1OmVbaFpxwRjdOJ3uWlA13u3178h6Q0MjU9pQFB94RtfTgrloMh/SDxHeyt/cJ/e\n\t 7yviU78CVvZrDmd+z8/I+nCzxD7IYm+TGrhgzur+yyx4/GhACV9cHgI4iz3eT2iZnk\n\t SSNq0l1VklN9s7Dhfcxz+SZN7c23vqYUsgPkanmuCaqMbF2x2/VQnE/OLACnVgmfM0\n\t 4TqWrQ5oGnH+YDBVQuZdBDMj38L26HvXP/xN4CyO9aboirzIV/g9JhfepL//8Odfv1\n\t IXdo53+tLk3o8/6C9Ck4uSdOV5EPstZvZWgbOmritJtnaNj1rAr/+V2DaZ5q557FBH\n\t qSAcRTA2yyMYg==", "From": "Andrey Albershteyn <aalbersh@kernel.org>", "To": "linux-xfs@vger.kernel.org,\n\tfsverity@lists.linux.dev,\n\tlinux-fsdevel@vger.kernel.org,\n\tebiggers@kernel.org", "Cc": "Andrey Albershteyn <aalbersh@kernel.org>,\n\thch@lst.de,\n\tlinux-ext4@vger.kernel.org,\n\tlinux-f2fs-devel@lists.sourceforge.net,\n\tlinux-btrfs@vger.kernel.org,\n\tdjwong@kernel.org", "Subject": "[PATCH v6 09/22] xfs: introduce fsverity on-disk changes", "Date": "Tue, 31 Mar 2026 23:28:10 +0200", "Message-ID": "<20260331212827.2631020-10-aalbersh@kernel.org>", "X-Mailer": "git-send-email 2.51.2", "In-Reply-To": "<20260331212827.2631020-1-aalbersh@kernel.org>", "References": "<20260331212827.2631020-1-aalbersh@kernel.org>", "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": "8bit", "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": "Introduce XFS_DIFLAG2_VERITY for inodes with fsverity. This flag\nindicates that inode has fs-verity enabled (i.e. descriptor exist,\ntree is built and file is read-only).\n\nIntroduce XFS_SB_FEAT_RO_COMPAT_VERITY for filesystems having\nfsverity inodes. As on-disk changes applies to fsverity inodes only, let\nolder kernels read-only access. This will be enabled in the further\npatch after full fsverity support.\n\nReviewed-by: Darrick J. Wong <djwong@kernel.org>\nReviewed-by: Christoph Hellwig <hch@lst.de>\nSigned-off-by: Andrey Albershteyn <aalbersh@kernel.org>\n---\n fs/xfs/libxfs/xfs_format.h | 30 +++++++++++++++++++++++++++++-\n fs/xfs/libxfs/xfs_inode_buf.c | 8 ++++++++\n fs/xfs/libxfs/xfs_inode_util.c | 2 ++\n fs/xfs/libxfs/xfs_sb.c | 2 ++\n fs/xfs/xfs_iops.c | 2 ++\n fs/xfs/xfs_mount.h | 2 ++\n 6 files changed, 45 insertions(+), 1 deletion(-)", "diff": "diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h\nindex 779dac59b1f3..4dff29659e40 100644\n--- a/fs/xfs/libxfs/xfs_format.h\n+++ b/fs/xfs/libxfs/xfs_format.h\n@@ -374,6 +374,7 @@ xfs_sb_has_compat_feature(\n #define XFS_SB_FEAT_RO_COMPAT_RMAPBT (1 << 1)\t\t/* reverse map btree */\n #define XFS_SB_FEAT_RO_COMPAT_REFLINK (1 << 2)\t\t/* reflinked files */\n #define XFS_SB_FEAT_RO_COMPAT_INOBTCNT (1 << 3)\t\t/* inobt block counts */\n+#define XFS_SB_FEAT_RO_COMPAT_VERITY (1 << 4)\t\t/* fs-verity */\n #define XFS_SB_FEAT_RO_COMPAT_ALL \\\n \t\t(XFS_SB_FEAT_RO_COMPAT_FINOBT | \\\n \t\t XFS_SB_FEAT_RO_COMPAT_RMAPBT | \\\n@@ -1230,16 +1231,21 @@ static inline void xfs_dinode_put_rdev(struct xfs_dinode *dip, xfs_dev_t rdev)\n */\n #define XFS_DIFLAG2_METADATA_BIT\t5\n \n+/* inodes sealed with fs-verity */\n+#define XFS_DIFLAG2_VERITY_BIT\t\t6\n+\n #define XFS_DIFLAG2_DAX\t\t(1ULL << XFS_DIFLAG2_DAX_BIT)\n #define XFS_DIFLAG2_REFLINK\t(1ULL << XFS_DIFLAG2_REFLINK_BIT)\n #define XFS_DIFLAG2_COWEXTSIZE\t(1ULL << XFS_DIFLAG2_COWEXTSIZE_BIT)\n #define XFS_DIFLAG2_BIGTIME\t(1ULL << XFS_DIFLAG2_BIGTIME_BIT)\n #define XFS_DIFLAG2_NREXT64\t(1ULL << XFS_DIFLAG2_NREXT64_BIT)\n #define XFS_DIFLAG2_METADATA\t(1ULL << XFS_DIFLAG2_METADATA_BIT)\n+#define XFS_DIFLAG2_VERITY\t(1ULL << XFS_DIFLAG2_VERITY_BIT)\n \n #define XFS_DIFLAG2_ANY \\\n \t(XFS_DIFLAG2_DAX | XFS_DIFLAG2_REFLINK | XFS_DIFLAG2_COWEXTSIZE | \\\n-\t XFS_DIFLAG2_BIGTIME | XFS_DIFLAG2_NREXT64 | XFS_DIFLAG2_METADATA)\n+\t XFS_DIFLAG2_BIGTIME | XFS_DIFLAG2_NREXT64 | XFS_DIFLAG2_METADATA | \\\n+\t XFS_DIFLAG2_VERITY)\n \n static inline bool xfs_dinode_has_bigtime(const struct xfs_dinode *dip)\n {\n@@ -2021,4 +2027,26 @@ struct xfs_acl {\n #define SGI_ACL_FILE_SIZE\t(sizeof(SGI_ACL_FILE)-1)\n #define SGI_ACL_DEFAULT_SIZE\t(sizeof(SGI_ACL_DEFAULT)-1)\n \n+/*\n+ * At maximum of 8 levels with 128 hashes per block (32 bytes SHA-256) maximum\n+ * tree size is ((128^8 − 1)/(128 − 1)) = 567*10^12 blocks. This should fit in\n+ * 53 bits address space.\n+ *\n+ * At this Merkle tree size we can cover 295EB large file. This is much larger\n+ * than the currently supported file size.\n+ *\n+ * For sha512 the largest file we can cover ends at 1 << 50 offset, this is also\n+ * good.\n+ */\n+#define XFS_FSVERITY_LARGEST_FILE\t((loff_t)1ULL << 53)\n+\n+/*\n+ * Alignment of the fsverity metadata placement. This is largest supported PAGE\n+ * SIZE for fsverity. This is used to space out data and metadata in page cache.\n+ * The spacing is necessary for non-exposure of metadata to userspace and\n+ * correct merkle tree synethesis in the iomap.\n+ */\n+#define XFS_FSVERITY_START_ALIGN\t(65536)\n+\n+\n #endif /* __XFS_FORMAT_H__ */\ndiff --git a/fs/xfs/libxfs/xfs_inode_buf.c b/fs/xfs/libxfs/xfs_inode_buf.c\nindex 3794e5412eba..f2181c1bed54 100644\n--- a/fs/xfs/libxfs/xfs_inode_buf.c\n+++ b/fs/xfs/libxfs/xfs_inode_buf.c\n@@ -760,6 +760,14 @@ xfs_dinode_verify(\n \t !xfs_has_rtreflink(mp))\n \t\treturn __this_address;\n \n+\t/* only regular files can have fsverity */\n+\tif (flags2 & XFS_DIFLAG2_VERITY) {\n+\t\tif (!xfs_has_verity(mp))\n+\t\t\treturn __this_address;\n+\t\tif (!S_ISREG(mode))\n+\t\t\treturn __this_address;\n+\t}\n+\n \tif (xfs_has_zoned(mp) &&\n \t dip->di_metatype == cpu_to_be16(XFS_METAFILE_RTRMAP)) {\n \t\tif (be32_to_cpu(dip->di_used_blocks) > mp->m_sb.sb_rgextents)\ndiff --git a/fs/xfs/libxfs/xfs_inode_util.c b/fs/xfs/libxfs/xfs_inode_util.c\nindex 551fa51befb6..6b1e20a4bb9b 100644\n--- a/fs/xfs/libxfs/xfs_inode_util.c\n+++ b/fs/xfs/libxfs/xfs_inode_util.c\n@@ -126,6 +126,8 @@ xfs_ip2xflags(\n \t\t\tflags |= FS_XFLAG_DAX;\n \t\tif (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)\n \t\t\tflags |= FS_XFLAG_COWEXTSIZE;\n+\t\tif (ip->i_diflags2 & XFS_DIFLAG2_VERITY)\n+\t\t\tflags |= FS_XFLAG_VERITY;\n \t}\n \n \tif (xfs_inode_has_attr_fork(ip))\ndiff --git a/fs/xfs/libxfs/xfs_sb.c b/fs/xfs/libxfs/xfs_sb.c\nindex 47322adb7690..a15510ebd2f1 100644\n--- a/fs/xfs/libxfs/xfs_sb.c\n+++ b/fs/xfs/libxfs/xfs_sb.c\n@@ -165,6 +165,8 @@ xfs_sb_version_to_features(\n \t\tfeatures |= XFS_FEAT_REFLINK;\n \tif (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_INOBTCNT)\n \t\tfeatures |= XFS_FEAT_INOBTCNT;\n+\tif (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_VERITY)\n+\t\tfeatures |= XFS_FEAT_VERITY;\n \tif (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_FTYPE)\n \t\tfeatures |= XFS_FEAT_FTYPE;\n \tif (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_SPINODES)\ndiff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c\nindex 208543e57eda..ca369eb96561 100644\n--- a/fs/xfs/xfs_iops.c\n+++ b/fs/xfs/xfs_iops.c\n@@ -1415,6 +1415,8 @@ xfs_diflags_to_iflags(\n \t\tflags |= S_NOATIME;\n \tif (init && xfs_inode_should_enable_dax(ip))\n \t\tflags |= S_DAX;\n+\tif (xflags & FS_XFLAG_VERITY)\n+\t\tflags |= S_VERITY;\n \n \t/*\n \t * S_DAX can only be set during inode initialization and is never set by\ndiff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h\nindex ddd4028be8d6..07f6aa3c3f26 100644\n--- a/fs/xfs/xfs_mount.h\n+++ b/fs/xfs/xfs_mount.h\n@@ -385,6 +385,7 @@ typedef struct xfs_mount {\n #define XFS_FEAT_EXCHANGE_RANGE\t(1ULL << 27)\t/* exchange range */\n #define XFS_FEAT_METADIR\t(1ULL << 28)\t/* metadata directory tree */\n #define XFS_FEAT_ZONED\t\t(1ULL << 29)\t/* zoned RT device */\n+#define XFS_FEAT_VERITY\t\t(1ULL << 30)\t/* fs-verity */\n \n /* Mount features */\n #define XFS_FEAT_NOLIFETIME\t(1ULL << 47)\t/* disable lifetime hints */\n@@ -442,6 +443,7 @@ __XFS_HAS_FEAT(exchange_range, EXCHANGE_RANGE)\n __XFS_HAS_FEAT(metadir, METADIR)\n __XFS_HAS_FEAT(zoned, ZONED)\n __XFS_HAS_FEAT(nolifetime, NOLIFETIME)\n+__XFS_HAS_FEAT(verity, VERITY)\n \n static inline bool xfs_has_rtgroups(const struct xfs_mount *mp)\n {\n", "prefixes": [ "v6", "09/22" ] }