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Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0-only */
2#ifndef PAGE_ACTOR_H
3#define PAGE_ACTOR_H
4/*
5 * Copyright (c) 2013
6 * Phillip Lougher <phillip@squashfs.org.uk>
7 */
8
9struct squashfs_page_actor {
10 union {
11 void **buffer;
12 struct page **page;
13 };
14 void *pageaddr;
15 void *tmp_buffer;
16 void *(*squashfs_first_page)(struct squashfs_page_actor *);
17 void *(*squashfs_next_page)(struct squashfs_page_actor *);
18 void (*squashfs_finish_page)(struct squashfs_page_actor *);
19 int pages;
20 int length;
21 int next_page;
22 int alloc_buffer;
23 int returned_pages;
24 pgoff_t next_index;
25};
26
27extern struct squashfs_page_actor *squashfs_page_actor_init(void **buffer,
28 int pages, int length);
29extern struct squashfs_page_actor *squashfs_page_actor_init_special(
30 struct squashfs_sb_info *msblk,
31 struct page **page, int pages, int length);
32static inline void squashfs_page_actor_free(struct squashfs_page_actor *actor)
33{
34 kfree(actor->tmp_buffer);
35 kfree(actor);
36}
37static inline void *squashfs_first_page(struct squashfs_page_actor *actor)
38{
39 return actor->squashfs_first_page(actor);
40}
41static inline void *squashfs_next_page(struct squashfs_page_actor *actor)
42{
43 return actor->squashfs_next_page(actor);
44}
45static inline void squashfs_finish_page(struct squashfs_page_actor *actor)
46{
47 actor->squashfs_finish_page(actor);
48}
49static inline void squashfs_actor_nobuff(struct squashfs_page_actor *actor)
50{
51 actor->alloc_buffer = 0;
52}
53#endif