From 9eeaa7cce84b9fb4674d5e99fbc0c68cdff8c25a Mon Sep 17 00:00:00 2001 From: Yegor Yefremov Date: Tue, 1 Mar 2016 12:10:04 +0100 Subject: 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 Tested-by: Antony Pavlov Signed-off-by: Sascha Hauer --- fs/squashfs/file_cache.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 fs/squashfs/file_cache.c (limited to 'fs/squashfs/file_cache.c') diff --git a/fs/squashfs/file_cache.c b/fs/squashfs/file_cache.c new file mode 100644 index 0000000000..9443e4558d --- /dev/null +++ b/fs/squashfs/file_cache.c @@ -0,0 +1,35 @@ +/* + * Copyright (c) 2013 + * Phillip Lougher + * + * This work is licensed under the terms of the GNU GPL, version 2. See + * the COPYING file in the top-level directory. + */ + +#include +#include +#include +#include + +#include "squashfs_fs.h" +#include "squashfs_fs_sb.h" +#include "squashfs_fs_i.h" +#include "squashfs.h" + +/* Read separately compressed datablock and memcopy into page cache */ +int squashfs_readpage_block(struct page *page, u64 block, int bsize) +{ + struct inode *i = page->inode; + struct squashfs_cache_entry *buffer = squashfs_get_datablock(i->i_sb, + block, bsize); + int res = buffer->error; + + if (res) + ERROR("Unable to read page, block %llx, size %x\n", block, + bsize); + else + squashfs_copy_cache(page, buffer, buffer->length, 0); + + squashfs_cache_put(buffer); + return res; +} -- cgit v1.2.3