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Message-ID: <176602332085.686273.7564676516217176769.stgit@frogsfrogsfrogs> Date: Wed, 17 Dec 2025 18:02:44 -0800 From: "Darrick J. Wong" <djwong@...nel.org> To: brauner@...nel.org, djwong@...nel.org Cc: linux-api@...r.kernel.org, hch@....de, linux-ext4@...r.kernel.org, jack@...e.cz, linux-xfs@...r.kernel.org, linux-fsdevel@...r.kernel.org, gabriel@...sman.be, hch@....de, amir73il@...il.com Subject: [PATCHSET V4 1/2] fs: generic file IO error reporting 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 V4 series which will come at a later time. 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 | 93 ++++++++++++++++ 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 | 168 ++++++++++++++++++++++++++++ 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, 365 insertions(+), 24 deletions(-) create mode 100644 include/linux/fserror.h create mode 100644 fs/fserror.c
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