diff options
Diffstat (limited to 'fs/squashfs/page_actor.h')
| -rw-r--r-- | fs/squashfs/page_actor.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/fs/squashfs/page_actor.h b/fs/squashfs/page_actor.h new file mode 100644 index 0000000000..97d4983559 --- /dev/null +++ b/fs/squashfs/page_actor.h @@ -0,0 +1,57 @@ +/* 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 *); + struct page *last_page; + 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 struct page *squashfs_page_actor_free(struct squashfs_page_actor *actor) +{ + struct page *last_page = actor->last_page; + + kfree(actor->tmp_buffer); + kfree(actor); + return last_page; +} +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 |