btrfs: Set file size correctly in file clone
Set src_offset = 0, src_length = 20K, dest_offset = 20K. And the original filesize of the dest file 'file2' is 30K: # ls -l /mnt/file2 -rw-r--r-- 1 root root 30720 Nov 18 16:42 /mnt/file2 Now clone file1 to file2, the dest file should be 40K, but it still shows 30K: # ls -l /mnt/file2 -rw-r--r-- 1 root root 30720 Nov 18 16:42 /mnt/file2 Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
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@ -1873,8 +1873,8 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
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* but shouldn't round up the file size
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*/
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endoff = new_key.offset + datal;
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if (endoff > off+olen)
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endoff = off+olen;
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if (endoff > destoff+olen)
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endoff = destoff+olen;
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if (endoff > inode->i_size)
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btrfs_i_size_write(inode, endoff);
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