cddf8a2c4a
Replace fiemap_check_flags with a fiemap_prep helper that also takes the inode and mapped range, and performs the sanity check and truncation previously done in fiemap_check_range. This way the validation is inside the file system itself and thus properly works for the stacked overlayfs case as well. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Amir Goldstein <amir73il@gmail.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Link: https://lore.kernel.org/r/20200523073016.2944131-7-hch@lst.de Signed-off-by: Theodore Ts'o <tytso@mit.edu>
26 lines
845 B
C
26 lines
845 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_FIEMAP_H
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#define _LINUX_FIEMAP_H 1
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#include <uapi/linux/fiemap.h>
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#include <linux/fs.h>
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struct fiemap_extent_info {
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unsigned int fi_flags; /* Flags as passed from user */
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unsigned int fi_extents_mapped; /* Number of mapped extents */
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unsigned int fi_extents_max; /* Size of fiemap_extent array */
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struct fiemap_extent __user *fi_extents_start; /* Start of
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fiemap_extent array */
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};
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int fiemap_prep(struct inode *inode, struct fiemap_extent_info *fieinfo,
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u64 start, u64 *len, u32 supported_flags);
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int fiemap_fill_next_extent(struct fiemap_extent_info *info, u64 logical,
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u64 phys, u64 len, u32 flags);
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int generic_block_fiemap(struct inode *inode,
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struct fiemap_extent_info *fieinfo, u64 start, u64 len,
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get_block_t *get_block);
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#endif /* _LINUX_FIEMAP_H 1 */
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