[PATCH 11/11] fuse: convert fuse_notify_store to use folios

[Josef Bacik <josef@toxicpanda.com>]

This function creates pages in an inode and copies data into them,
update the function to use a folio instead of a page, and use the
appropriate folio helpers.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
---
 fs/fuse/dev.c | 30 +++++++++++++++++-------------
 1 file changed, 17 insertions(+), 13 deletions(-)

diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index bcce75e07678..eeb5cea4b7e4 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -1607,24 +1607,28 @@ static int fuse_notify_store(struct fuse_conn *fc, unsigned int size,
 
 	num = outarg.size;
 	while (num) {
+		struct folio *folio;
 		struct page *page;
 		unsigned int this_num;
 
-		err = -ENOMEM;
-		page = find_or_create_page(mapping, index,
-					   mapping_gfp_mask(mapping));
-		if (!page)
+		folio = __filemap_get_folio(mapping, index,
+					    FGP_LOCK|FGP_ACCESSED|FGP_CREAT,
+					    mapping_gfp_mask(mapping));
+		if (IS_ERR(folio)) {
+			err = PTR_ERR(folio);
 			goto out_iput;
-
-		this_num = min_t(unsigned, num, PAGE_SIZE - offset);
-		err = fuse_copy_page(cs, &page, offset, this_num, 0);
-		if (!PageUptodate(page) && !err && offset == 0 &&
-		    (this_num == PAGE_SIZE || file_size == end)) {
-			zero_user_segment(page, this_num, PAGE_SIZE);
-			SetPageUptodate(page);
 		}
-		unlock_page(page);
-		put_page(page);
+
+		page = &folio->page;
+		this_num = min_t(unsigned, num, folio_size(folio) - offset);
+		err = fuse_copy_page(cs, &page, offset, this_num, 0);
+		if (!folio_test_uptodate(folio) && !err && offset == 0 &&
+		    (this_num == folio_size(folio) || file_size == end)) {
+			folio_zero_range(folio, this_num, folio_size(folio));
+			folio_mark_uptodate(folio);
+		}
+		folio_unlock(folio);
+		folio_put(folio);
 
 		if (err)
 			goto out_iput;
-- 
2.43.0