> Subject: iomap: Support tail packing
I can't say I like this "tail packing" language here when we have the
perfectly fine inline wording. Same for various comments in the actual
code.
> + /* inline and tail-packed data must start page aligned in the file */
> + if (WARN_ON_ONCE(offset_in_page(iomap->offset)))
> + return -EIO;
> + if (WARN_ON_ONCE(size > PAGE_SIZE - offset_in_page(iomap->inline_data)))
> + return -EIO;
Why can't we use iomap_inline_data_size_valid here? That is how can
size be different from iomap->legth?
Shouldn't the offset_in_page also go into iomap_inline_data_size_valid,
which should probably be called iomap_inline_data_valid then?
> if (iomap->type == IOMAP_INLINE) {
> + int ret = iomap_read_inline_data(inode, page, iomap);
> + return ret ?: PAGE_SIZE;
The ?: expression without the first leg is really confuing. Especially
if a good old if is much more readable here.
int ret = iomap_read_inline_data(inode, page, iomap);
if (ret)
return ret;
return PAGE_SIZE;
> + copied = copy_from_iter(iomap_inline_data(iomap, pos), length, iter);
> + copied = copy_to_iter(iomap_inline_data(iomap, pos), length, iter);
Pleae avoid the overly long lines.
