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 | |
9 | struct 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 | struct page *last_page; |
20 | int pages; |
21 | int length; |
22 | int next_page; |
23 | int alloc_buffer; |
24 | int returned_pages; |
25 | pgoff_t next_index; |
26 | }; |
27 | |
28 | extern struct squashfs_page_actor *squashfs_page_actor_init(void **buffer, |
29 | int pages, int length); |
30 | extern struct squashfs_page_actor *squashfs_page_actor_init_special( |
31 | struct squashfs_sb_info *msblk, |
32 | struct page **page, int pages, int length); |
33 | static inline struct page *squashfs_page_actor_free(struct squashfs_page_actor *actor) |
34 | { |
35 | struct page *last_page = actor->last_page; |
36 | |
37 | kfree(objp: actor->tmp_buffer); |
38 | kfree(objp: actor); |
39 | return last_page; |
40 | } |
41 | static inline void *squashfs_first_page(struct squashfs_page_actor *actor) |
42 | { |
43 | return actor->squashfs_first_page(actor); |
44 | } |
45 | static inline void *squashfs_next_page(struct squashfs_page_actor *actor) |
46 | { |
47 | return actor->squashfs_next_page(actor); |
48 | } |
49 | static inline void squashfs_finish_page(struct squashfs_page_actor *actor) |
50 | { |
51 | actor->squashfs_finish_page(actor); |
52 | } |
53 | static inline void squashfs_actor_nobuff(struct squashfs_page_actor *actor) |
54 | { |
55 | actor->alloc_buffer = 0; |
56 | } |
57 | #endif |
58 |