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vfs: check file ranges before cloning files

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Move the file range checks from vfs_clone_file_prep into a separate
generic_remap_checks function so that all the checks are collected in a
central location.  This forms the basis for adding more checks from
generic_write_checks that will make cloning's input checking more
consistent with write input checking.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Darrick J. Wong
2018-10-30 10:40:31 +11:00
committed by Dave Chinner
parent 5b49f64db2
commit 1383a7ed67
5 changed files with 90 additions and 47 deletions
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2
fs/ocfs2/refcounttree.c
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@@ -4850,7 +4850,7 @@ int ocfs2_reflink_remap_range(struct file *file_in,
(OCFS2_I(inode_out)->ip_flags & OCFS2_INODE_SYSTEM_FILE))
goto out_unlock;
ret = vfs_clone_file_prep_inodes(inode_in, pos_in, inode_out, pos_out,
ret = vfs_clone_file_prep(file_in, pos_in, file_out, pos_out,
&len, is_dedupe);
if (ret <= 0)
goto out_unlock;