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0c1d9e4a61
XFS only supports the unwritten extent bit in the data fork, and only if the file system has a version 5 superblock or the unwritten extent feature bit. We currently have two routines that validate the invariant: xfs_check_nostate_extents which return -EFSCORRUPTED when it's not met, and xfs_validate_extent that triggers and assert in debug build. Both of them iterate over all extents of an inode fork when called, which isn't very efficient. This patch instead adds a new helper that verifies the invariant one extent at a time, and calls it from the places where we iterate over all extents to converted them from or two the in-memory format. The callers then return -EFSCORRUPTED when reading invalid extents from disk, or trigger an assert when writing them to disk. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.