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93e72b3c61
ll_rw_block() function has been deprecated in favor of BIO which appears to come with large performance improvements. This patch decreases boot time by close to 40% when using squashfs for the root file-system. This is observed at least in the context of starting an Android VM on Chrome OS using crosvm. The patch was tested on 4.19 as well as master. This patch is largely based on Adrien Schildknecht's patch that was originally sent as https://lkml.org/lkml/2017/9/22/814 though with some significant changes and simplifications while also taking Phillip Lougher's feedback into account, around preserving support for FILE_CACHE in particular. [akpm@linux-foundation.org: fix build error reported by Randy] Link: http://lkml.kernel.org/r/319997c2-5fc8-f889-2ea3-d913308a7c1f@infradead.org Signed-off-by: Philippe Liard <pliard@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: Adrien Schildknecht <adrien+dev@schischi.me> Cc: Phillip Lougher <phillip@squashfs.org.uk> Cc: Guenter Roeck <groeck@chromium.org> Cc: Daniel Rosenberg <drosen@google.com> Link: https://chromium.googlesource.com/chromiumos/platform/crosvm Link: http://lkml.kernel.org/r/20191106074238.186023-1-pliard@google.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
54 lines
1.3 KiB
C
54 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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#ifndef DECOMPRESSOR_H
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#define DECOMPRESSOR_H
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/*
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* Squashfs - a compressed read only filesystem for Linux
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*
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* Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
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* Phillip Lougher <phillip@squashfs.org.uk>
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*
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* decompressor.h
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*/
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#include <linux/bio.h>
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struct squashfs_decompressor {
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void *(*init)(struct squashfs_sb_info *, void *);
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void *(*comp_opts)(struct squashfs_sb_info *, void *, int);
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void (*free)(void *);
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int (*decompress)(struct squashfs_sb_info *, void *,
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struct bio *, int, int, struct squashfs_page_actor *);
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int id;
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char *name;
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int supported;
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};
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static inline void *squashfs_comp_opts(struct squashfs_sb_info *msblk,
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void *buff, int length)
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{
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return msblk->decompressor->comp_opts ?
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msblk->decompressor->comp_opts(msblk, buff, length) : NULL;
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}
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#ifdef CONFIG_SQUASHFS_XZ
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extern const struct squashfs_decompressor squashfs_xz_comp_ops;
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#endif
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#ifdef CONFIG_SQUASHFS_LZ4
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extern const struct squashfs_decompressor squashfs_lz4_comp_ops;
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#endif
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#ifdef CONFIG_SQUASHFS_LZO
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extern const struct squashfs_decompressor squashfs_lzo_comp_ops;
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#endif
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#ifdef CONFIG_SQUASHFS_ZLIB
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extern const struct squashfs_decompressor squashfs_zlib_comp_ops;
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#endif
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#ifdef CONFIG_SQUASHFS_ZSTD
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extern const struct squashfs_decompressor squashfs_zstd_comp_ops;
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#endif
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#endif
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