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Commit 96d63337 authored by Shumin Qiu's avatar Shumin Qiu Committed by Gerrit - the friendly Code Review server
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Dm: init: Enable rootfs mount as dm-verity during boot without ramdisk 



If the rootfs image has HASH tree appended, we need mount the
rootfs as dm-verity in boot phase. This commit make rootfs mount
as dm-verity without ramdisk.

Change-Id: I10329ba09d57b832482cd9b5f668acc88bddf548
Signed-off-by: default avatarShumin Qiu <shuminq@codeaurora.org>
parent 8d0fbc83

arch/arm64/boot/dts/qcom/dm-verity-boot.dtsi

0 → 100644
+28 −0
Original line number Diff line number Diff line 
/* Copyright (c) 2019, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and

 * only version 2 as published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */

dm_verity {

	dmname="disabled";

	version="1";

	data_device="/dev/sda6";

	hash_device="/dev/sda6";

	data_block_size="4096";

	hash_block_size="4096";

	number_of_data_blocks="262144";

	hash_start_block="262145";

	algorithm="sha256";

	// root hash: 64 bytes long

	digest=

	"b0fe12d7da6e23a1e19b5a69252c7aaf7b249191eb13bba3f566d630b3f2828a";

	salt="a2df040e00f02c3b2a19e90e5aa76fe1a303f4e08584aaf40e87f088a32b7709";

	// restart_on_corruption ignore_corruption ignore_zero_blocks

	opt="restart_on_corruption";

};

arch/arm64/boot/dts/qcom/sa8155.dtsi

+2 −0
Original line number Diff line number Diff line
@@ -598,6 +598,8 @@ 
		read-only;

		ranges;

	};



	/include/ "dm-verity-boot.dtsi"

};



&ipa_hw {

drivers/md/dm-ioctl.c

+35 −0
Original line number Diff line number Diff line
@@ -6,6 +6,7 @@ 
 */



#include "dm-core.h"

#include "dm-ioctrl.h"



#include <linux/module.h>

#include <linux/vmalloc.h>
@@ -2056,3 +2057,37 @@ int dm_copy_name_and_uuid(struct mapped_device *md, char *name, char *uuid) 


	return r;

}



int __init dm_ioctrl(uint cmd, struct dm_ioctl *param)

{

	int r = 0;

	int ioctl_flags;

	ioctl_fn fn = NULL;

	size_t input_param_size;



	/*

	 * Nothing more to do for the version command.

	 */

	if (cmd == DM_VERSION_CMD)

		return 0;



	DMDEBUG("dm_ctl_ioctl: command 0x%x", cmd);



	fn = lookup_ioctl(cmd, &ioctl_flags);

	if (!fn) {

		DMWARN("dm_ctl_ioctl: unknown command 0x%x", cmd);

		return -ENOTTY;

	}



	input_param_size = param->data_size;

	param->data_size = sizeof(*param);



	r = fn(NULL, param, input_param_size);



	if (unlikely(param->flags & DM_BUFFER_FULL_FLAG) &&

		unlikely(ioctl_flags & IOCTL_FLAGS_NO_PARAMS))

		DMERR("ioctl %d  but has IOCTL_FLAGS_NO_PARAMS set", cmd);



	return r;

}

EXPORT_SYMBOL(dm_ioctrl);

drivers/md/dm-ioctrl.h

0 → 100644
+20 −0
Original line number Diff line number Diff line 
/* Copyright (c) 2019, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and

 * only version 2 as published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */



#ifndef DM_IOCTRL_INTERNAL_H

#define DM_IOCTRL_INTERNAL_H



#include <linux/dm-ioctl.h>



int dm_ioctrl(uint cmd, struct dm_ioctl *param);



#endif

init/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ mounts-$(CONFIG_BLK_DEV_RAM) += do_mounts_rd.o 
mounts-$(CONFIG_BLK_DEV_INITRD)	+= do_mounts_initrd.o

mounts-$(CONFIG_BLK_DEV_MD)	+= do_mounts_md.o

mounts-$(CONFIG_BLK_DEV_DM)	+= do_mounts_dm.o

mounts-$(CONFIG_BLK_DEV_DM)	+= do_mounts_verity.o



# dependencies on generated files need to be listed explicitly

$(obj)/version.o: include/generated/compile.h