Hi Joanne,
On Fri, Aug 29, 2025 at 04:56:24PM -0700, Joanne Koong wrote:
> Add a void *private arg for read and readahead which filesystems that
> pass in custom read callbacks can use. Stash this in the existing
> private field in the iomap_iter.
>
> Signed-off-by: Joanne Koong <joannelkoong@xxxxxxxxx>
> ---
> block/fops.c | 4 ++--
> fs/erofs/data.c | 4 ++--
> fs/gfs2/aops.c | 4 ++--
> fs/iomap/buffered-io.c | 8 ++++++--
> fs/xfs/xfs_aops.c | 4 ++--
> fs/zonefs/file.c | 4 ++--
> include/linux/iomap.h | 4 ++--
> 7 files changed, 18 insertions(+), 14 deletions(-)
>
...
> int iomap_read_folio(struct folio *folio, const struct iomap_ops *ops,
> - const struct iomap_read_ops *read_ops)
> + const struct iomap_read_ops *read_ops, void *private)
> {
> struct iomap_iter iter = {
> .inode = folio->mapping->host,
> .pos = folio_pos(folio),
> .len = folio_size(folio),
> + .private = private,
> };
Will this whole work be landed for v6.18?
If not, may I ask if this patch can be shifted advance in this
patchset for applying separately (I tried but no luck).
Because I also need some similar approach for EROFS iomap page
cache sharing feature since EROFS uncompressed I/Os go through
iomap and extra information needs a proper way to pass down to
iomap_{begin,end} with extra pointer `.private` too.
Thanks,
Gao Xiang
