162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0-only */ 262306a36Sopenharmony_ci#ifndef PAGE_ACTOR_H 362306a36Sopenharmony_ci#define PAGE_ACTOR_H 462306a36Sopenharmony_ci/* 562306a36Sopenharmony_ci * Copyright (c) 2013 662306a36Sopenharmony_ci * Phillip Lougher <phillip@squashfs.org.uk> 762306a36Sopenharmony_ci */ 862306a36Sopenharmony_ci 962306a36Sopenharmony_cistruct squashfs_page_actor { 1062306a36Sopenharmony_ci union { 1162306a36Sopenharmony_ci void **buffer; 1262306a36Sopenharmony_ci struct page **page; 1362306a36Sopenharmony_ci }; 1462306a36Sopenharmony_ci void *pageaddr; 1562306a36Sopenharmony_ci void *tmp_buffer; 1662306a36Sopenharmony_ci void *(*squashfs_first_page)(struct squashfs_page_actor *); 1762306a36Sopenharmony_ci void *(*squashfs_next_page)(struct squashfs_page_actor *); 1862306a36Sopenharmony_ci void (*squashfs_finish_page)(struct squashfs_page_actor *); 1962306a36Sopenharmony_ci struct page *last_page; 2062306a36Sopenharmony_ci int pages; 2162306a36Sopenharmony_ci int length; 2262306a36Sopenharmony_ci int next_page; 2362306a36Sopenharmony_ci int alloc_buffer; 2462306a36Sopenharmony_ci int returned_pages; 2562306a36Sopenharmony_ci pgoff_t next_index; 2662306a36Sopenharmony_ci}; 2762306a36Sopenharmony_ci 2862306a36Sopenharmony_ciextern struct squashfs_page_actor *squashfs_page_actor_init(void **buffer, 2962306a36Sopenharmony_ci int pages, int length); 3062306a36Sopenharmony_ciextern struct squashfs_page_actor *squashfs_page_actor_init_special( 3162306a36Sopenharmony_ci struct squashfs_sb_info *msblk, 3262306a36Sopenharmony_ci struct page **page, int pages, int length); 3362306a36Sopenharmony_cistatic inline struct page *squashfs_page_actor_free(struct squashfs_page_actor *actor) 3462306a36Sopenharmony_ci{ 3562306a36Sopenharmony_ci struct page *last_page = actor->last_page; 3662306a36Sopenharmony_ci 3762306a36Sopenharmony_ci kfree(actor->tmp_buffer); 3862306a36Sopenharmony_ci kfree(actor); 3962306a36Sopenharmony_ci return last_page; 4062306a36Sopenharmony_ci} 4162306a36Sopenharmony_cistatic inline void *squashfs_first_page(struct squashfs_page_actor *actor) 4262306a36Sopenharmony_ci{ 4362306a36Sopenharmony_ci return actor->squashfs_first_page(actor); 4462306a36Sopenharmony_ci} 4562306a36Sopenharmony_cistatic inline void *squashfs_next_page(struct squashfs_page_actor *actor) 4662306a36Sopenharmony_ci{ 4762306a36Sopenharmony_ci return actor->squashfs_next_page(actor); 4862306a36Sopenharmony_ci} 4962306a36Sopenharmony_cistatic inline void squashfs_finish_page(struct squashfs_page_actor *actor) 5062306a36Sopenharmony_ci{ 5162306a36Sopenharmony_ci actor->squashfs_finish_page(actor); 5262306a36Sopenharmony_ci} 5362306a36Sopenharmony_cistatic inline void squashfs_actor_nobuff(struct squashfs_page_actor *actor) 5462306a36Sopenharmony_ci{ 5562306a36Sopenharmony_ci actor->alloc_buffer = 0; 5662306a36Sopenharmony_ci} 5762306a36Sopenharmony_ci#endif 58