On 2025/11/14 17:55, Hongbo Li wrote:
It's useful to get filesystem-specific information using the
existing private field in the @iomap_iter passed to iomap_{begin,end}
for advanced usage for iomap buffered reads, which is much like the
current iomap DIO.
For example, EROFS needs it to:
- implement an efficient page cache sharing feature, since iomap
needs to apply to anon inode page cache but we'd like to get the
backing inode/fs instead, so filesystem-specific private data is
needed to keep such information;
- pass in both struct page * and void * for inline data to avoid
kmap_to_page() usage (which is bogus).
Signed-off-by: Hongbo Li <[email protected]>
LGTM, and I think the case 2) is useful even without
the main feature:
Reviewed-by: Gao Xiang <[email protected]>
Thanks,
Gao Xiang
