f2fs: compress: add .{init,destroy}_decompress_ctx callback

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Add below two callback interfaces in struct f2fs_compress_ops:

	int (*init_decompress_ctx)(struct decompress_io_ctx *dic);
	void (*destroy_decompress_ctx)(struct decompress_io_ctx *dic);

Which will be used by zstd compress algorithm later.

In addition, this patch adds callback function pointer check, so that
specified algorithm can avoid defining unneeded functions.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

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Chao Yu 2020-03-03 16:57:07 +08:00 • committed by Jaegeuk Kim

parent 09ff48011e

commit 23b1faaade

1 changed files with 21 additions and 6 deletions

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fs/f2fs/compress.c

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