fuse: convert readlink to use folios

Convert readlink requests to use a folio instead of a page.

No functional changes.

Signed-off-by: Joanne Koong <[email protected]>
Reviewed-by: Josef Bacik <[email protected]>
Signed-off-by: Miklos Szeredi <[email protected]>

Author: joannekoong

fs/fuse/dir.c

@@ -1585,14 +1585,15 @@ static int fuse_permission(struct mnt_idmap *idmap,
 	return err;
 }
 
-static int fuse_readlink_page(struct inode *inode, struct page *page)
+static int fuse_readlink_page(struct inode *inode, struct folio *folio)
 {
 	struct fuse_mount *fm = get_fuse_mount(inode);
-	struct fuse_page_desc desc = { .length = PAGE_SIZE - 1 };
+	struct fuse_folio_desc desc = { .length = PAGE_SIZE - 1 };
 	struct fuse_args_pages ap = {
-		.num_pages = 1,
-		.pages = &page,
-		.descs = &desc,
+		.uses_folios = true,
+		.num_folios = 1,
+		.folios = &folio,
+		.folio_descs = &desc,
 	};
 	char *link;
 	ssize_t res;
@@ -1614,7 +1615,7 @@ static int fuse_readlink_page(struct inode *inode, struct page *page)
 	if (WARN_ON(res >= PAGE_SIZE))
 		return -EIO;
 
-	link = page_address(page);
+	link = folio_address(folio);
 	link[res] = '\0';
 
 	return 0;
@@ -1624,7 +1625,7 @@ static const char *fuse_get_link(struct dentry *dentry, struct inode *inode,
 				 struct delayed_call *callback)
 {
 	struct fuse_conn *fc = get_fuse_conn(inode);
-	struct page *page;
+	struct folio *folio;
 	int err;
 
 	err = -EIO;
@@ -1638,20 +1639,20 @@ static const char *fuse_get_link(struct dentry *dentry, struct inode *inode,
 	if (!dentry)
 		goto out_err;
 
-	page = alloc_page(GFP_KERNEL);
+	folio = folio_alloc(GFP_KERNEL, 0);
 	err = -ENOMEM;
-	if (!page)
+	if (!folio)
 		goto out_err;
 
-	err = fuse_readlink_page(inode, page);
+	err = fuse_readlink_page(inode, folio);
 	if (err) {
-		__free_page(page);
+		folio_put(folio);
 		goto out_err;
 	}
 
-	set_delayed_call(callback, page_put_link, page);
+	set_delayed_call(callback, page_put_link, &folio->page);
 
-	return page_address(page);
+	return folio_address(folio);
 
 out_err:
 	return ERR_PTR(err);
@@ -2231,7 +2232,7 @@ void fuse_init_dir(struct inode *inode)
 
 static int fuse_symlink_read_folio(struct file *null, struct folio *folio)
 {
-	int err = fuse_readlink_page(folio->mapping->host, &folio->page);
+	int err = fuse_readlink_page(folio->mapping->host, folio);
 
 	if (!err)
 		folio_mark_uptodate(folio);