From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 94ED322D4C3; Tue, 13 Jan 2026 00:31:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768264264; cv=none; b=XzoTefZTxPqsiSay9zywqJGFHOcHFk8W7osQolnUJObpjLrBuzirSZLqzfBbW3D25So6c7fURPKnKiGv3LlZ3Tod7b4F+Qewo+s1DY959rzZj/8efqWDjl2Ejj4NfDUfj+YX0GOU6MAltkB38UiXETVtT1NaeL7H3o3KHc/44pk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768264264; c=relaxed/simple; bh=DoVnohM3KBF8iAxZ57g2+ikEUZiTeD/SvaJUOQDGUb0=; h=Date:Subject:From:To:Cc:Message-ID:MIME-Version:Content-Type; b=r+H/VRzzInPfwhN4mBBT+dmvIEaQRc35dpTr3Ody86V9l3QkaU8cjjVGC7Q4H+xlSxmOGYN+N+MmetpxcB0HkVNEGtCpYU7LG+uvWurppKYRF+mt8g3P569M+A+hjMHaToMHwh4riyN5UjBIaHkEBJwRyKVdYeaN7gNavLL2Ujc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=hqNzNFuM; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="hqNzNFuM" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6D196C19421; Tue, 13 Jan 2026 00:31:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768264264; bh=DoVnohM3KBF8iAxZ57g2+ikEUZiTeD/SvaJUOQDGUb0=; h=Date:Subject:From:To:Cc:From; b=hqNzNFuMthw4J+yzmREuEB3Gwe2OlW3IN5iINtmqtdwl2zGwmu4UPvB85KVzPty6S pqTDsuxyxNTRg9nixgpOm212BlTPwON0o4SLqm0nLkLiHwGHXQrP0YV80gMzPZjlDm i900BBAew1SrCI/hPT2WotSWIcZuNnVNDGfgS4mRRvGGjP5BlDXf+KOL4m0TQzRzM1 adGcyi+BasBoDNiiSsss5+4xZOZwM9aPTik8QZ19kRXEeXbssPHoCeBmIzksGfuPNZ ldzbGUmf2rNu1bJp1I9g2w7raKnfXBouVD4jk5c6Oum0ItoVwJR8mAcbDPDJwVwOlB iwZgbbQsiUTiA== Date: Mon, 12 Jan 2026 16:31:03 -0800 Subject: [PATCHSET v5] fs: generic file IO error reporting From: "Darrick J. Wong" To: djwong@kernel.org, brauner@kernel.org Cc: linux-api@vger.kernel.org, jack@suse.cz, hch@lst.de, hsiangkao@linux.alibaba.com, linux-xfs@vger.kernel.org, jack@suse.cz, linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org, gabriel@krisman.be, hch@lst.de, amir73il@gmail.com Message-ID: <176826402528.3490369.2415315475116356277.stgit@frogsfrogsfrogs> Precedence: bulk X-Mailing-List: linux-api@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Hi all, This patchset adds some generic helpers so that filesystems can report errors to fsnotify in a standard way. Then it adapts iomap to use the generic helpers so that any iomap-enabled filesystem can report I/O errors through this mechanism as well. Finally, it makes XFS report metadata errors through this mechanism in much the same way that ext4 does now. These are a prerequisite for the XFS self-healing series which will come at a later time. v5: tidy comments, un-inline the unmount function v4: drag out of RFC status, finalize the sign of errnos that we accept If you're going to start using this code, I strongly recommend pulling from my git trees, which are linked below. This has been running on the djcloud for months with no problems. Enjoy! Comments and questions are, as always, welcome. --D kernel git tree: https://git.kernel.org/cgit/linux/kernel/git/djwong/xfs-linux.git/log/?h=filesystem-error-reporting fstests git tree: https://git.kernel.org/cgit/linux/kernel/git/djwong/xfstests-dev.git/log/?h=filesystem-error-reporting --- Commits in this patchset: * uapi: promote EFSCORRUPTED and EUCLEAN to errno.h * fs: report filesystem and file I/O errors to fsnotify * iomap: report file I/O errors to the VFS * xfs: report fs metadata errors via fsnotify * xfs: translate fsdax media errors into file "data lost" errors when convenient * ext4: convert to new fserror helpers --- arch/alpha/include/uapi/asm/errno.h | 2 arch/mips/include/uapi/asm/errno.h | 2 arch/parisc/include/uapi/asm/errno.h | 2 arch/sparc/include/uapi/asm/errno.h | 2 fs/erofs/internal.h | 2 fs/ext2/ext2.h | 1 fs/ext4/ext4.h | 3 fs/f2fs/f2fs.h | 3 fs/minix/minix.h | 2 fs/udf/udf_sb.h | 2 fs/xfs/xfs_linux.h | 2 include/linux/fs/super_types.h | 7 + include/linux/fserror.h | 75 +++++++++++ include/linux/jbd2.h | 3 include/uapi/asm-generic/errno.h | 2 tools/arch/alpha/include/uapi/asm/errno.h | 2 tools/arch/mips/include/uapi/asm/errno.h | 2 tools/arch/parisc/include/uapi/asm/errno.h | 2 tools/arch/sparc/include/uapi/asm/errno.h | 2 tools/include/uapi/asm-generic/errno.h | 2 fs/Makefile | 2 fs/ext4/ioctl.c | 2 fs/ext4/super.c | 13 +- fs/fserror.c | 194 ++++++++++++++++++++++++++++ fs/iomap/buffered-io.c | 23 +++ fs/iomap/direct-io.c | 12 ++ fs/iomap/ioend.c | 6 + fs/super.c | 3 fs/xfs/xfs_fsops.c | 4 + fs/xfs/xfs_health.c | 14 ++ fs/xfs/xfs_notify_failure.c | 4 + 31 files changed, 373 insertions(+), 24 deletions(-) create mode 100644 include/linux/fserror.h create mode 100644 fs/fserror.c