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linux-next/fs/erofs/compress.h
Alexander A. Klimov 592e7cd00b erofs: Replace HTTP links with HTTPS ones
Rationale:
Reduces attack surface on kernel devs opening the links for MITM
as HTTPS traffic is much harder to manipulate.

Deterministic algorithm:
For each file:
  If not .svg:
    For each line:
      If doesn't contain `\bxmlns\b`:
        For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`:
	  If neither `\bgnu\.org/license`, nor `\bmozilla\.org/MPL\b`:
            If both the HTTP and HTTPS versions
            return 200 OK and serve the same content:
              Replace HTTP with HTTPS.

Reviewed-by: Gao Xiang <hsiangkao@redhat.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Alexander A. Klimov <grandmaster@al2klimov.de>
Link: https://lore.kernel.org/r/20200713130944.34419-1-grandmaster@al2klimov.de
Signed-off-by: Gao Xiang <hsiangkao@redhat.com>
2020-08-03 21:04:29 +08:00

61 lines
1.4 KiB
C

/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2019 HUAWEI, Inc.
* https://www.huawei.com/
* Created by Gao Xiang <gaoxiang25@huawei.com>
*/
#ifndef __EROFS_FS_COMPRESS_H
#define __EROFS_FS_COMPRESS_H
#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;
unsigned short pageofs_out;
unsigned int inputsize, outputsize;
/* indicate the algorithm will be used for decompression */
unsigned int alg;
bool inplace_io, partial_decoding;
};
/*
* - 0x5A110C8D ('sallocated', Z_EROFS_MAPPING_STAGING) -
* used to mark temporary allocated pages from other
* file/cached pages and NULL mapping pages.
*/
#define Z_EROFS_MAPPING_STAGING ((void *)0x5A110C8D)
/* check if a page is marked as staging */
static inline bool z_erofs_page_is_staging(struct page *page)
{
return page->mapping == Z_EROFS_MAPPING_STAGING;
}
static inline bool z_erofs_put_stagingpage(struct list_head *pagepool,
struct page *page)
{
if (!z_erofs_page_is_staging(page))
return false;
/* staging pages should not be used by others at the same time */
if (page_ref_count(page) > 1)
put_page(page);
else
list_add(&page->lru, pagepool);
return true;
}
int z_erofs_decompress(struct z_erofs_decompress_req *rq,
struct list_head *pagepool);
#endif