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Commit 040942fc authored by Eugene Zemtsov's avatar Eugene Zemtsov Committed by Paul Lawrence
Browse files

ANDROID: Initial commit of Incremental FS 



Fully working incremental fs filesystem

Signed-off-by: default avatarEugene Zemtsov <ezemtsov@google.com>
Signed-off-by: default avatarPaul Lawrence <paullawrence@google.com>

Bug: 133435829
Change-Id: I14741a61ce7891a0f9054e70f026917712cbef78
parent c98264c0

fs/Kconfig

+1 −0
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@@ -114,6 +114,7 @@ source "fs/quota/Kconfig" 
source "fs/autofs/Kconfig"

source "fs/fuse/Kconfig"

source "fs/overlayfs/Kconfig"

source "fs/incfs/Kconfig"



menu "Caches"

fs/Makefile

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@@ -110,6 +110,7 @@ obj-$(CONFIG_ADFS_FS) += adfs/ 
obj-$(CONFIG_FUSE_FS)		+= fuse/

obj-$(CONFIG_OVERLAY_FS)	+= overlayfs/

obj-$(CONFIG_ORANGEFS_FS)       += orangefs/

obj-$(CONFIG_INCREMENTAL_FS)	+= incfs/

obj-$(CONFIG_UDF_FS)		+= udf/

obj-$(CONFIG_SUN_OPENPROMFS)	+= openpromfs/

obj-$(CONFIG_OMFS_FS)		+= omfs/

fs/incfs/Kconfig

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config INCREMENTAL_FS

	tristate "Incremental file system support"

	depends on BLOCK

	select DECOMPRESS_LZ4

	select CRC32

	select CRYPTO

	select CRYPTO_SHA256

	select X509_CERTIFICATE_PARSER

	select ASYMMETRIC_KEY_TYPE

	select ASYMMETRIC_PUBLIC_KEY_SUBTYPE

	select PKCS7_MESSAGE_PARSER

	help

	  Incremental FS is a read-only virtual file system that facilitates execution

	  of programs while their binaries are still being lazily downloaded over the

	  network, USB or pigeon post.



	  To compile this file system support as a module, choose M here: the

	  module will be called incrementalfs.

fs/incfs/Makefile

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# SPDX-License-Identifier: GPL-2.0

obj-$(CONFIG_INCREMENTAL_FS)	+= incrementalfs.o



incrementalfs-y := \

	data_mgmt.o \

	format.o \

	integrity.o \

	main.o \

	vfs.o

fs/incfs/compat.h

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/* SPDX-License-Identifier: GPL-2.0 */

/*

 * Copyright 2019 Google LLC

 */

#ifndef _INCFS_COMPAT_H

#define _INCFS_COMPAT_H



#include <linux/lz4.h>

#include <linux/version.h>



typedef unsigned int __poll_t;



#ifndef u64_to_user_ptr

#define u64_to_user_ptr(x) (		\

{					\

	typecheck(u64, x);		\

	(void __user *)(uintptr_t)x;	\

}					\

)

#endif



#ifndef lru_to_page

#define lru_to_page(head) (list_entry((head)->prev, struct page, lru))

#endif



#define readahead_gfp_mask(x)	\

	(mapping_gfp_mask(x) | __GFP_NORETRY | __GFP_NOWARN)



#ifndef SB_ACTIVE

#define SB_ACTIVE MS_ACTIVE

#endif



#endif /* _INCFS_COMPAT_H */