| /* SPDX-License-Identifier: GPL-2.0-only */ |
| #ifndef PAGE_ACTOR_H |
| #define PAGE_ACTOR_H |
| /* |
| * Copyright (c) 2013 |
| * Phillip Lougher <phillip@squashfs.org.uk> |
| */ |
| |
| struct squashfs_page_actor { |
| union { |
| void **buffer; |
| struct page **page; |
| }; |
| void *pageaddr; |
| void *tmp_buffer; |
| void *(*squashfs_first_page)(struct squashfs_page_actor *); |
| void *(*squashfs_next_page)(struct squashfs_page_actor *); |
| void (*squashfs_finish_page)(struct squashfs_page_actor *); |
| int pages; |
| int length; |
| int next_page; |
| int alloc_buffer; |
| int returned_pages; |
| pgoff_t next_index; |
| }; |
| |
| extern struct squashfs_page_actor *squashfs_page_actor_init(void **buffer, |
| int pages, int length); |
| extern struct squashfs_page_actor *squashfs_page_actor_init_special( |
| struct squashfs_sb_info *msblk, |
| struct page **page, int pages, int length); |
| static inline void *squashfs_first_page(struct squashfs_page_actor *actor) |
| { |
| return actor->squashfs_first_page(actor); |
| } |
| static inline void *squashfs_next_page(struct squashfs_page_actor *actor) |
| { |
| return actor->squashfs_next_page(actor); |
| } |
| static inline void squashfs_finish_page(struct squashfs_page_actor *actor) |
| { |
| actor->squashfs_finish_page(actor); |
| } |
| static inline void squashfs_actor_nobuff(struct squashfs_page_actor *actor) |
| { |
| actor->alloc_buffer = 0; |
| } |
| #endif |