int ntfs_attr_set (ntfs_inode * ni, const s64 ofs, const s64 cnt, const u8 val);
Fill cnt bytes of the attribute described by the ntfs inode ni starting at byte offset ofs inside the attribute with the constant byte val.
This function is effectively like memset applied to an ntfs attribute. Note thie function actually only operates on the page cache pages belonging to the ntfs attribute and it marks them dirty after doing the memset. Thus it relies on the vm dirty page write code paths to cause the modified pages to be written to the mft record/disk.
Return 0 on success and -errno on error. An error code of -ESPIPE means that ofs + cnt were outside the end of the attribute and no write was performed.