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Commit cb7c1ddc authored by Venkata Rao Kakani's avatar Venkata Rao Kakani Committed by Gerrit - the friendly Code Review server
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init: early_userspace: Mount Early Services partition early 



Early Services needs early services partition to be mounted
early and launching of early init should happen early.

Change-Id: I2f2a79b9be00b48eb293d0f22a92f80474a32c03
Signed-off-by: default avatarVenkata Rao Kakani <vkakani@codeaurora.org>
parent 4d044fea

Makefile

+8 −0
Original line number Diff line number Diff line
@@ -430,6 +430,14 @@ KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 
		   -Werror-implicit-function-declaration \

		   -Wno-format-security \

		   -std=gnu89

ifeq ($(TARGET_BOARD_TYPE),auto)

KBUILD_CFLAGS    += -DCONFIG_PLATFORM_AUTO

endif



ifeq ($(CONFIG_EARLY_INIT),true)

KBUILD_CFLAGS    += -DCONFIG_EARLY_SERVICES

endif



KBUILD_CPPFLAGS := -D__KERNEL__

KBUILD_AFLAGS_KERNEL :=

KBUILD_CFLAGS_KERNEL :=

include/linux/init.h

+1 −0
Original line number Diff line number Diff line
@@ -133,6 +133,7 @@ extern unsigned int reset_devices; 
/* used by init/main.c */

void setup_arch(char **);

void prepare_namespace(void);

void __init launch_early_services(void);

void __init load_default_modules(void);

int __init init_rootfs(void);

init/do_mounts.c

+79 −1
Original line number Diff line number Diff line
@@ -42,7 +42,13 @@ int root_mountflags = MS_RDONLY | MS_SILENT; 
static char * __initdata root_device_name;

static char __initdata saved_root_name[64];

static int root_wait;



#ifdef CONFIG_EARLY_SERVICES

static char saved_modem_name[64] __initdata;

static char saved_early_userspace[64] __initdata;

static char init_prog[128] = "/early_services/init_early";

static char *init_prog_argv[2] = { init_prog, NULL };

#define EARLY_SERVICES_MOUNT_POINT "/early_services"

#endif

dev_t ROOT_DEV;



static int __init load_ramdisk(char *str)
@@ -299,6 +305,22 @@ static int __init root_dev_setup(char *line) 


__setup("root=", root_dev_setup);



#ifdef CONFIG_EARLY_SERVICES

static int __init modem_dev_setup(char *line)

{

	strlcpy(saved_modem_name, line, sizeof(saved_modem_name));

	return 1;

}



__setup("modem=", modem_dev_setup);

static int __init early_userspace_setup(char *line)

{

	strlcpy(saved_early_userspace, line, sizeof(saved_early_userspace));

	return 1;

}



__setup("early_userspace=", early_userspace_setup);

#endif

static int __init rootwait_setup(char *str)

{

	if (*str)
@@ -387,7 +409,22 @@ static int __init do_mount_root(char *name, char *fs, int flags, void *data) 


	return 0;

}

#ifdef CONFIG_EARLY_SERVICES

static int __init do_mount_part(char *name, char *fs, int flags,

				void *data, char *mnt_point)

{

	int err;



	err = sys_mount((char __user *)name, (char __user *)mnt_point,

			(char __user *)fs, (unsigned long)flags,

						(void __user *)data);

	if (err) {

		pr_err("Mount Partition [%s] failed[%d]\n", name, err);

		return err;

	}

	return 0;

}

#endif

void __init mount_block_root(char *name, int flags)

{

	struct page *page = alloc_page(GFP_KERNEL);
@@ -552,6 +589,47 @@ void __init mount_root(void) 
#endif

}



#ifdef CONFIG_EARLY_SERVICES

static int __init mount_partition(char *part_name, char *mnt_point)

{

	struct page *page = alloc_page(GFP_KERNEL);

	char *fs_names = page_address(page);

	char *p;

	int err = -EPERM;



	get_fs_names(fs_names);

	for (p = fs_names; *p; p += strlen(p)+1) {

		err = do_mount_part(part_name, p, root_mountflags,

					NULL, mnt_point);

		switch (err) {

		case 0:

			return err;

		case -EACCES:

		case -EINVAL:

			continue;

		}

		printk_all_partitions();

		return err;

	}

	return err;

}

void __init launch_early_services(void)

{

	int rc = 0;



	rc = mount_partition(saved_early_userspace, EARLY_SERVICES_MOUNT_POINT);

	place_marker("Early Services Partition ready");

	if (!rc) {

		rc = call_usermodehelper(init_prog, init_prog_argv, NULL, 0);

		if (!rc)

			pr_info("early_init launched\n");

		else

			pr_err("early_init failed\n");

	}

}

#else

void __init launch_early_services(void) { }

#endif

/*

 * Prepare the namespace - decide what/where to mount, load ramdisks, etc.

 */

init/main.c

+1 −0
Original line number Diff line number Diff line
@@ -1092,6 +1092,7 @@ static noinline void __init kernel_init_freeable(void) 
	if (sys_access((const char __user *) ramdisk_execute_command, 0) != 0) {

		ramdisk_execute_command = NULL;

		prepare_namespace();

		launch_early_services();

	}



	/*