From: Joanne Koong <joannelkoong@gmail.com> Add support for folios larger than one page size for stores. Also change variable naming from "this_num" to "nr_bytes". Signed-off-by: Joanne Koong <joannelkoong@gmail.com> Reviewed-by: Josef Bacik <josef@toxicpanda.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> --- fs/fuse/dev.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c index a535e954f1ae..69033de18c90 100644 --- a/fs/fuse/dev.c +++ b/fs/fuse/dev.c @@ -1611,18 +1611,23 @@ static int fuse_notify_store(struct fuse_conn *fc, unsigned int size, num = outarg.size; while (num) { struct folio *folio; - unsigned int this_num; + unsigned int folio_offset; + unsigned int nr_bytes; + unsigned int nr_pages; folio = filemap_grab_folio(mapping, index); err = PTR_ERR(folio); if (IS_ERR(folio)) goto out_iput; - this_num = min_t(unsigned, num, folio_size(folio) - offset); - err = fuse_copy_folio(cs, &folio, offset, this_num, 0); + folio_offset = ((index - folio->index) << PAGE_SHIFT) + offset; + nr_bytes = min_t(unsigned, num, folio_size(folio) - folio_offset); + nr_pages = (offset + nr_bytes + PAGE_SIZE - 1) >> PAGE_SHIFT; + + err = fuse_copy_folio(cs, &folio, folio_offset, nr_bytes, 0); if (!folio_test_uptodate(folio) && !err && offset == 0 && - (this_num == folio_size(folio) || file_size == end)) { - folio_zero_segment(folio, this_num, folio_size(folio)); + (nr_bytes == folio_size(folio) || file_size == end)) { + folio_zero_segment(folio, nr_bytes, folio_size(folio)); folio_mark_uptodate(folio); } folio_unlock(folio); @@ -1631,9 +1636,9 @@ static int fuse_notify_store(struct fuse_conn *fc, unsigned int size, if (err) goto out_iput; - num -= this_num; + num -= nr_bytes; offset = 0; - index++; + index += nr_pages; } err = 0; -- 2.46.1