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author | Yegor Yefremov <yegorslists@googlemail.com> | 2016-03-01 12:10:04 +0100 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2016-03-02 19:51:48 +0100 |
commit | 9eeaa7cce84b9fb4674d5e99fbc0c68cdff8c25a (patch) | |
tree | c5cd7a0914ed710db656e616a41624dad900bcd7 /fs/squashfs/page_actor.h | |
parent | 237abe7bb8c5083a1f23c5bd346c41483f15ed0d (diff) | |
download | barebox-9eeaa7cce84b9fb4674d5e99fbc0c68cdff8c25a.tar.gz barebox-9eeaa7cce84b9fb4674d5e99fbc0c68cdff8c25a.tar.xz |
fs: add support for SquashFS 4.0
The driver was imported from Linux 4.4.
Current implementation supports only XZ decompressor.
Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
Tested-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'fs/squashfs/page_actor.h')
-rw-r--r-- | fs/squashfs/page_actor.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/fs/squashfs/page_actor.h b/fs/squashfs/page_actor.h new file mode 100644 index 0000000000..c07f05f397 --- /dev/null +++ b/fs/squashfs/page_actor.h @@ -0,0 +1,53 @@ +#ifndef PAGE_ACTOR_H +#define PAGE_ACTOR_H +/* + * Copyright (c) 2013 + * Phillip Lougher <phillip@squashfs.org.uk> + * + * This work is licensed under the terms of the GNU GPL, version 2. See + * the COPYING file in the top-level directory. + */ + +#include <malloc.h> +#include <linux/barebox-wrapper.h> +#include <linux/pagemap.h> + +struct squashfs_page_actor { + void **page; + int pages; + int length; + int next_page; +}; + +static inline struct squashfs_page_actor *squashfs_page_actor_init(void **page, + int pages, int length) +{ + struct squashfs_page_actor *actor = kmalloc(sizeof(*actor), GFP_KERNEL); + + if (actor == NULL) + return NULL; + + actor->length = length ? : pages * PAGE_CACHE_SIZE; + actor->page = page; + actor->pages = pages; + actor->next_page = 0; + return actor; +} + +static inline void *squashfs_first_page(struct squashfs_page_actor *actor) +{ + actor->next_page = 1; + return actor->page[0]; +} + +static inline void *squashfs_next_page(struct squashfs_page_actor *actor) +{ + return actor->next_page == actor->pages ? NULL : + actor->page[actor->next_page++]; +} + +static inline void squashfs_finish_page(struct squashfs_page_actor *actor) +{ + /* empty */ +} +#endif |