summaryrefslogtreecommitdiff
path: root/fs/erofs/compress.h
diff options
context:
space:
mode:
Diffstat (limited to 'fs/erofs/compress.h')
-rw-r--r--fs/erofs/compress.h28
1 files changed, 19 insertions, 9 deletions
diff --git a/fs/erofs/compress.h b/fs/erofs/compress.h
index 3701c72bacb2..579406504919 100644
--- a/fs/erofs/compress.h
+++ b/fs/erofs/compress.h
@@ -8,11 +8,6 @@
#include "internal.h"
-enum {
- Z_EROFS_COMPRESSION_SHIFTED = Z_EROFS_COMPRESSION_MAX,
- Z_EROFS_COMPRESSION_RUNTIME_MAX
-};
-
struct z_erofs_decompress_req {
struct super_block *sb;
struct page **in, **out;
@@ -25,6 +20,12 @@ struct z_erofs_decompress_req {
bool inplace_io, partial_decoding;
};
+struct z_erofs_decompressor {
+ int (*decompress)(struct z_erofs_decompress_req *rq,
+ struct page **pagepool);
+ char *name;
+};
+
/* some special page->private (unsigned long, see below) */
#define Z_EROFS_SHORTLIVED_PAGE (-1UL << 2)
#define Z_EROFS_PREALLOCATED_PAGE (-2UL << 2)
@@ -63,7 +64,7 @@ static inline bool z_erofs_is_shortlived_page(struct page *page)
return true;
}
-static inline bool z_erofs_put_shortlivedpage(struct list_head *pagepool,
+static inline bool z_erofs_put_shortlivedpage(struct page **pagepool,
struct page *page)
{
if (!z_erofs_is_shortlived_page(page))
@@ -74,13 +75,22 @@ static inline bool z_erofs_put_shortlivedpage(struct list_head *pagepool,
put_page(page);
} else {
/* follow the pcluster rule above. */
- set_page_private(page, 0);
- list_add(&page->lru, pagepool);
+ erofs_pagepool_add(pagepool, page);
}
return true;
}
+#define MNGD_MAPPING(sbi) ((sbi)->managed_cache->i_mapping)
+static inline bool erofs_page_is_managed(const struct erofs_sb_info *sbi,
+ struct page *page)
+{
+ return page->mapping == MNGD_MAPPING(sbi);
+}
+
int z_erofs_decompress(struct z_erofs_decompress_req *rq,
- struct list_head *pagepool);
+ struct page **pagepool);
+/* prototypes for specific algorithms */
+int z_erofs_lzma_decompress(struct z_erofs_decompress_req *rq,
+ struct page **pagepool);
#endif