Android TV : 系统分区配置及增加私有分区

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一、系统分区配置及解析流程

  android系统开发时,经常会遇到添加或者调整系统分区大小的问题,下面以mstar的一款产品(M8386)为例进行分析。

(1)mount指令可以查看到板子中挂载的分区,主要关注ext4类型分区,例如tvservice,tvconfig,tvconfig,tvcustomer :

sugarcane:/ # mount
rootfs on / type rootfs (ro,seclabel)
tmpfs on /dev type tmpfs (rw,seclabel,nosuid,relatime,mode=755)
devpts on /dev/pts type devpts (rw,seclabel,relatime,mode=600,ptmxmode=000)
proc on /proc type proc (rw,relatime)
sysfs on /sys type sysfs (rw,seclabel,relatime)
selinuxfs on /sys/fs/selinux type selinuxfs (rw,relatime)
/dev/block/mmcblk0p11 on /system type ext4 (rw,seclabel,relatime,data=ordered)
/dev/block/mmcblk0p13 on /vendor type ext4 (rw,seclabel,relatime,data=ordered)
debugfs on /sys/kernel/debug type debugfs (rw,seclabel,relatime)
none on /acct type cgroup (rw,relatime,cpuacct)
none on /dev/stune type cgroup (rw,relatime,schedtune)
tmpfs on /mnt type tmpfs (rw,seclabel,relatime,mode=755,gid=1000)
none on /config type configfs (rw,relatime)
none on /dev/cpuctl type cgroup (rw,relatime,cpu)
none on /dev/cpuset type cgroup (rw,relatime,cpuset,noprefix,release_agent=/sbin/cpuset_release_agent)
pstore on /sys/fs/pstore type pstore (rw,seclabel,relatime)
tmpfs on /var type tmpfs (rw,seclabel,relatime,mode=775,gid=1000)
/dev/block/mmcblk0p23 on /data type ext4 (rw,seclabel,nosuid,nodev,noatime,data=ordered)
/dev/block/mmcblk0p12 on /cache type ext4 (rw,seclabel,nosuid,nodev,noatime,data=ordered)
/dev/block/mmcblk0p14 on /tvservice type ext4 (ro,seclabel,relatime,data=ordered)
/dev/block/mmcblk0p15 on /tvconfig type ext4 (ro,seclabel,relatime,data=ordered)
/dev/block/mmcblk0p16 on /tvdatabase type ext4 (rw,seclabel,nosuid,nodev,noatime,data=ordered)
/dev/block/mmcblk0p17 on /tvcustomer type ext4 (rw,seclabel,nosuid,nodev,noatime,data=ordered)
/dev/block/mmcblk0p22 on /tvcertificate type ext4 (rw,seclabel,nosuid,nodev,noatime,data=ordered)
/dev/block/mmcblk0p18 on /cusswap type ext4 (rw,seclabel,nosuid,nodev,noatime,data=ordered)
/dev/block/mmcblk0p19 on /cusdata type ext4 (rw,seclabel,nosuid,nodev,noatime,data=ordered)
/dev/block/mmcblk0p21 on /cusparam type ext4 (rw,seclabel,nosuid,nodev,noatime,data=ordered)
tmpfs on /storage type tmpfs (rw,seclabel,relatime,mode=755,gid=1000)
tracefs on /sys/kernel/debug/tracing type tracefs (rw,seclabel,relatime)
/data/media on /mnt/runtime/default/emulated type sdcardfs (rw,nosuid,nodev,noexec,noatime,fsuid=1023,fsgid=1023,gid=1015,multiuser,mask=6,reserved=50MB)
/data/media on /storage/emulated type sdcardfs (rw,nosuid,nodev,noexec,noatime,fsuid=1023,fsgid=1023,gid=1015,multiuser,mask=6,reserved=50MB)
/data/media on /mnt/runtime/read/emulated type sdcardfs (rw,nosuid,nodev,noexec,noatime,fsuid=1023,fsgid=1023,gid=9997,multiuser,mask=23,reserved=50MB)
/data/media on /mnt/runtime/write/emulated type sdcardfs (rw,nosuid,nodev,noexec,noatime,fsuid=1023,fsgid=1023,gid=9997,multiuser,mask=7,reserved=50MB)

 (2)查看分区文件 /device/mstar/sugarcane/fstab.m7221 (android平台不同厂商可能名称不一样,但是都是fstab.xxx的形式) ,截取部分信息如下:

/dev/block/platform/mstar_mci.0/by-name/system          /system             ext4      ro                                                    wait,recoveryonly
/dev/block/platform/mstar_mci.0/by-name/userdata        /data               ext4      noatime,nosuid,nodev                                  wait,check
/dev/block/platform/mstar_mci.0/by-name/cache           /cache              ext4      noatime,nosuid,nodev                                  wait,check
/dev/block/platform/mstar_mci.0/by-name/vendor          /vendor             ext4      ro                                                    wait,recoveryonly
/dev/block/platform/mstar_mci.0/by-name/tvservice       /tvservice          ext4      ro                                                    wait
/dev/block/platform/mstar_mci.0/by-name/tvconfig        /tvconfig           ext4      ro                                                    wait
/dev/block/platform/mstar_mci.0/by-name/tvdatabase      /tvdatabase         ext4      noatime,nosuid,nodev                                  wait,check
/dev/block/platform/mstar_mci.0/by-name/tvcustomer      /tvcustomer         ext4      noatime,nosuid,nodev                                  wait,check
/dev/block/platform/mstar_mci.0/by-name/tvcertificate   /tvcertificate      ext4      noatime,nosuid,nodev                                  wait,check

 (3)指定各个分区的大小,device/mstar/sugarcane/BoardConfig.mk 文件指定各自大小可以根据需要进行修改

# mmc part
# :  type name      (size)
#1.  recovery       (30M)
#2.  boot           (20M)
#3.  tee            (6M)
#4.  rtpm           (256K)
#5.  dtb            (1M)
#6.  frc            (1M)
#7.  optee          (6M)
#8.  armfw          (64K)
#9.  system         (1200M)
#10. userdata       (4400M)
#11. cache          (1G)
#12. vendor         (300M)
#13. tvservice      (160M)
#14. tvconfig       (19M)
#15. tvdatabase     (8M)
#16. tvcustomer     (16M)
#17. tvcertificate  (8M)
#18. cm4            (512K)
#19. cusswap        (5M)
#20. cusdata        (5M)
#21. cusparam       (512M)
BOARD_RECOVERYIMAGE_PARTITION_SIZE      := 0x02000000
BOARD_BOOTIMAGE_PARTITION_SIZE          := 0x01400000
BOARD_OPTEEIMAGE_PARTITION_SIZE         := 0x00600000
BOARD_ARMFWIMAGE_PARTITION_SIZE         := 0x00010000
BOARD_TEEIMAGE_PARTITION_SIZE           := 0x00600000
BOARD_RTPMIMAGE_PARTITION_SIZE          := 0x00040000
BOARD_DTBIMAGE_PARTITION_SIZE           := 0x00100000
BOARD_FRCIMAGE_PARTITION_SIZE           := 0x00100000
BOARD_CACHEIMAGE_PARTITION_SIZE         := 1073741824
ifeq ($(BOARD_EMMC_FLASH_SIZE),16G)
    BOARD_SYSTEMIMAGE_PARTITION_SIZE    := 2147483648
    BOARD_VENDORIMAGE_PARTITION_SIZE    := 3221225472
else
    BOARD_SYSTEMIMAGE_PARTITION_SIZE    := 1992294400 
    BOARD_VENDORIMAGE_PARTITION_SIZE    := 419430400 
endif
BOARD_TVSERVICEIMAGE_PARTITION_SIZE     := 0x0A000000
BOARD_TVCONFIGIMAGE_PARTITION_SIZE      := 0x01000000
BOARD_TVDATABASEIMAGE_PARTITION_SIZE    := 0x00800000
BOARD_TVCUSTOMERIMAGE_PARTITION_SIZE    := 0x01000000
BOARD_TVCERTIFICATEIMAGE_PARTITION_SIZE := 0x00800000
BOARD_CM4IMAGE_PARTITION_SIZE           := 0x00080000
BOARD_CUSSWAP_PARTITION_SIZE            := 5242880
BOARD_CUSDATA_PARTITION_SIZE            := 5242880
ifeq ($(BOARD_EMMC_ENLARGE_PARAM),Y)
    BOARD_CUSPARAM_PARTITION_SIZE       := 536870912
else
    BOARD_CUSPARAM_PARTITION_SIZE       := 5242880
endif
BOARD_USERDATAIMAGE_PARTITION_SIZE      := 817889280

BOARD_FLASH_BLOCK_SIZE := 512

 (4)分区调整后在device/mstar/sugarcane/ 下的 fstab.m7221 中指定挂载节点及其他属性,由nit.m7221.rc脚本中on fs 模块启动:

on fs
    write /proc/sys/vm/page-cluster 0
    mount_all /fstab.m7221
    swapon_all /fstab.m7221

(5)init进程解析fstab.monet文件,keywords.h文件中注册mount_all操作方法 :

enum {
    K_UNKNOWN,
#endif
    KEYWORD(capability,  OPTION,  0, 0)
    KEYWORD(chdir,       COMMAND, 1, do_chdir)
    KEYWORD(chroot,      COMMAND, 1, do_chroot)
    KEYWORD(class,       OPTION,  0, 0)
    KEYWORD(class_start, COMMAND, 1, do_class_start)
    KEYWORD(class_stop,  COMMAND, 1, do_class_stop)
    KEYWORD(class_reset, COMMAND, 1, do_class_reset)
    KEYWORD(console,     OPTION,  0, 0)
    KEYWORD(critical,    OPTION,  0, 0)
    KEYWORD(disabled,    OPTION,  0, 0)
    KEYWORD(domainname,  COMMAND, 1, do_domainname)
    KEYWORD(enable,      COMMAND, 1, do_enable)
    KEYWORD(exec,        COMMAND, 1, do_exec)
    KEYWORD(export,      COMMAND, 2, do_export)
    KEYWORD(group,       OPTION,  0, 0)
    KEYWORD(hostname,    COMMAND, 1, do_hostname)
    KEYWORD(ifup,        COMMAND, 1, do_ifup)
    KEYWORD(insmod,      COMMAND, 1, do_insmod)
    KEYWORD(import,      SECTION, 1, 0)
    KEYWORD(keycodes,    OPTION,  0, 0)
    KEYWORD(mkdir,       COMMAND, 1, do_mkdir)
    KEYWORD(mount_all,   COMMAND, 1, do_mount_all)
    KEYWORD(mount,       COMMAND, 3, do_mount)
    KEYWORD(on,          SECTION, 0, 0)
    KEYWORD(oneshot,     OPTION,  0, 0)
    KEYWORD(onrestart,   OPTION,  0, 0)
    KEYWORD(powerctl,    COMMAND, 1, do_powerctl)
    KEYWORD(restart,     COMMAND, 1, do_restart)
    KEYWORD(restorecon,  COMMAND, 1, do_restorecon)
    KEYWORD(restorecon_recursive,  COMMAND, 1, do_restorecon_recursive)
    KEYWORD(rm,          COMMAND, 1, do_rm)
    KEYWORD(rmdir,       COMMAND, 1, do_rmdir)
    KEYWORD(seclabel,    OPTION,  0, 0)
    KEYWORD(service,     SECTION, 0, 0)
    KEYWORD(setcon,      COMMAND, 1, do_setcon)
    KEYWORD(setenforce,  COMMAND, 1, do_setenforce)
    KEYWORD(setenv,      OPTION,  2, 0)
    KEYWORD(setkey,      COMMAND, 0, do_setkey)
    KEYWORD(setprop,     COMMAND, 2, do_setprop)
    KEYWORD(setrlimit,   COMMAND, 3, do_setrlimit)
    KEYWORD(setsebool,   COMMAND, 2, do_setsebool)
    KEYWORD(socket,      OPTION,  0, 0)
    KEYWORD(start,       COMMAND, 1, do_start)
    KEYWORD(stop,        COMMAND, 1, do_stop)
    KEYWORD(swapon_all,  COMMAND, 1, do_swapon_all)
    KEYWORD(trigger,     COMMAND, 1, do_trigger)
    KEYWORD(symlink,     COMMAND, 1, do_symlink)
    KEYWORD(sysclktz,    COMMAND, 1, do_sysclktz)
    KEYWORD(user,        OPTION,  0, 0)
    KEYWORD(wait,        COMMAND, 1, do_wait)
    KEYWORD(write,       COMMAND, 2, do_write)
    KEYWORD(copy,        COMMAND, 2, do_copy)
    KEYWORD(chown,       COMMAND, 2, do_chown)
    KEYWORD(chmod,       COMMAND, 2, do_chmod)
    KEYWORD(loglevel,    COMMAND, 1, do_loglevel)
    KEYWORD(load_persist_props,    COMMAND, 0, do_load_persist_props)
    KEYWORD(load_all_props,        COMMAND, 0, do_load_all_props)
    KEYWORD(ioprio,      OPTION,  0, 0)
#ifdef __MAKE_KEYWORD_ENUM__
    KEYWORD_COUNT,
}

  builtins.c文件中do_mount_all,启动一个进程调用fs_mgr_read_fstab,fs_mgr_mount_all启动解析,其中systemcorefs_mgr又被vold,adb等模块用来解析fstab.xxx等分区文件。

(6)根据第三步中指定的分区大小,进行打包对应分区的img文件

    releaseimage.sh, mkimage.sh, build_image.sh, make_usb_upgrade.sh等脚本(vendormstarcommonscripts目录下),会根据第三步设置的大小来制作img文件

         mkimage.sh           

...
function make-images()
{
    mkdir -p $RELEASE_OUT
    mkdir -p $RELEASE_OUT/scripts

    gernerate-script-start

    # Raw partition must be first.
    make-raw-partition
    make-split-fs-partition system $BOARD_SYSTEMIMAGE_PARTITION_SIZE true
    make-fs-partition userdata $BOARD_USERDATAIMAGE_PARTITION_SIZE true
    make-fs-partition cache $BOARD_CACHEIMAGE_PARTITION_SIZE true
    make-split-fs-partition vendor $BOARD_VENDORIMAGE_PARTITION_SIZE true
    make-fs-partition tvservice $BOARD_TVSERVICEIMAGE_PARTITION_SIZE false
    make-fs-partition tvconfig $BOARD_TVCONFIGIMAGE_PARTITION_SIZE false
    make-fs-partition tvdatabase $BOARD_TVDATABASEIMAGE_PARTITION_SIZE false
    make-fs-partition tvcustomer $BOARD_TVCUSTOMERIMAGE_PARTITION_SIZE false
    make-fs-partition tvcertificate $BOARD_TVCERTIFICATEIMAGE_PARTITION_SIZE false
    if [ "$BOARD_SYSTEMBACKUP" == "true" ]; then
        split-fs-partition systembackup $BOARD_SYSTEMBACKUPIMAGE_PARTITION_SIZE true
    fi
    if [ "$BOARD_CERTIFICATIONIMAGE" == "true" ]; then
        make-fs-partition certificate $BOARD_CERTIFICATEIMAGE_PARTITION_SIZE false
    fi
    # You can make-fs-partition() or make-split-fs-partition() here...

  ......

}

   buiild_image.sh

......
#make-fs-partition $PARTITION_NAME $PARTITION_SIZE $PARTITION_ANDROID
function make-fs-partition()
{
    echo -e "33[31mMake fs $1 partition...33[0m"
    local PARTITION_NAME=$1
    local PARTITION_SIZE=$2
    local PARTITION_ANDROID=$3

    # Generate image
    gernerate-fs-image $PARTITION_NAME $PARTITION_SIZE $PARTITION_ANDROID

    release-fs-partition $PARTITION_NAME $PARTITION_SIZE $PARTITION_ANDROID
}
.......

 

# Generate system/userdate/cache/... image
function gernerate-fs-image()
{
    local PARTITION_NAME=$1
    local PARTITION_SIZE=$2
    local PARTITION_ANDROID=$3

    if [ "$PARTITION_NAME" == "userdata" ]; then
        local MOUNT_POINT=data
    else
        local MOUNT_POINT=$PARTITION_NAME
    fi

    local TARGET_OUT=$PRODUCT_OUT/$MOUNT_POINT
    if [ ! -d "$TARGET_OUT" ]; then
        echo "No $TARGET_OUT directory to gernerate image."
        return
    fi

    if [ "$PARTITION_NAME" == "system" -o "$PARTITION_NAME" == "userdata" -o "$PARTITION_NAME" == "cache" -o "$PARTITION_NAME" == "vendor" -o "$PARTITION_NAME" == "systembackup" ]; then
        if [  $PARTITION_NAME == "system" ]; then
            local IMAGE_INFO=$PRODUCT_OUT/obj/PACKAGING/systemimage_intermediates/system_image_info.txt
        else
            local IMAGE_INFO=$PRODUCT_OUT/obj/PACKAGING/"$PARTITION_NAME"_intermediates/"$PARTITION_NAME"_image_info.txt
        fi

        generate-userimage-prop-dictionary $IMAGE_INFO
        ./build/tools/releasetools/build_image.py $TARGET_OUT $IMAGE_INFO $PRODUCT_OUT/$PARTITION_NAME.img $PRODUCT_OUT/system
    else
        make_ext4fs -S $SELINUX_FC -l $PARTITION_SIZE -a $MOUNT_POINT $PRODUCT_OUT/$PARTITION_NAME.img $TARGET_OUT
    fi
}

  最后make_use_upgrade.sh打包,发布整体软件。  

 

二、M8386平台新增cusdata、cusparam分区

(1)device

    device/mstar/sugarcane/BoardConfigCommon.mk

 #18. cm4            (512K)
+#19. cusdata        (5M)
+#20. cusparam       (512M)
 BOARD_CM4IMAGE_PARTITION_SIZE           := 0x00080000
+BOARD_CUSDATA_PARTITION_SIZE            := 0x00500000
+BOARD_CUSPARAM_PARTITION_SIZE       := 0x20000000

    device/mstar/sugarcane/fstab.m7221

 /dev/block/platform/mstar_mci.0/by-name/tvcertificate   /tvcertificate      ext4      noatime,nosuid,nodev                                  wait,check
+/dev/block/platform/mstar_mci.0/by-name/cusdata         /cusdata            ext4      noatime,nosuid,nodev                                  wait,check
+/dev/block/platform/mstar_mci.0/by-name/cusparam        /cusparam           ext4      noatime,nosuid,nodev                                  wait,check

(2)vendor

    vendor/mstar/common/scripts/build_image.sh

   BOARD_TVCERTIFICATEIMAGE_PARTITION_SIZE=$(get_build_var BOARD_TVCERTIFICATEIMAGE_PARTITION_SIZE)
  +BOARD_CUSDATA_PARTITION_SIZE=$(get_build_var BOARD_CUSDATA_PARTITION_SIZE)
+BOARD_CUSPARAM_PARTITION_SIZE=$(get_build_var BOARD_CUSPARAM_PARTITION_SIZE)

    vendor/mstar/common/scripts/make_usb_upgrade.sh

     fullUpgrade=$1
     if [ "$fullUpgrade" == "Y" ]  || [ "$fullUpgrade" == "y" ] ; then
         mainScript=$(grep -Ev "^$|#|%" $AUTO_UPDATE_SCRIPT)
+    elif [ "$fullUpgrade" == "M" ]  || [ "$fullUpgrade" == "m" ] ; then
+       #confirm each image is upgrade or not.
+        mainScript=""
+        tmp2="
+"
+        tmpScript=$(grep "^mstar" $AUTO_UPDATE_SCRIPT | grep "[[")
+        for mainContent in $tmpScript
+        do
+            imageName=$(echo $mainContent | awk {print $2} | cut -d / -f 2)
+            if [ "$imageName" != "[[cusdata" ]; then
+                mainScript=$mainScript$mainContent$tmp2
+            fi
+        done
+        #pad set_config to usb script
+        tmpScript=$(grep "set_config" $AUTO_UPDATE_SCRIPT)
+        mainScript=$mainScript$tmpScript
     else
     if [ "$FullUpgrade" == "Y" ];then
         tmp=$FullUpgrade
+    elif [ "$FullUpgrade" == "M" ];then
+        tmp=$FullUpgrade

    else

    vendor/mstar/common/scripts/releaseimage.sh

     release-fs-partition tvcustomer $BOARD_TVCUSTOMERIMAGE_PARTITION_SIZE false
+    make_ext4fs -l $BOARD_CUSDATA_PARTITION_SIZE  $PRODUCT_OUT/cusdata.img $TARGET_OUT
+    release-fs-partition cusdata $BOARD_CUSDATA_PARTITION_SIZE false
+    make-split-fs-partition cusparam $BOARD_CUSPARAM_PARTITION_SIZE false
     if [ -n "$BOARD_TVCERTIFICATEIMAGE_PARTITION_SIZE" ]; then
         release-fs-partition tvcertificate $BOARD_TVCERTIFICATEIMAGE_PARTITION_SIZE false
     fi

    vendor/mstar/common/sepolicy/device.te

 type mstar_tvservice_block_device, dev_type;
+type mstar_cusdata_block_device, dev_type;
+type mstar_cusparam_block_device, dev_type;

    vendor/mstar/common/sepolicy/file.te

 type tv_service_file, exec_type, vendor_file_type, file_type;
+type cusdata_file, file_type;
+type cusparam_file, file_type;

    vendor/mstar/common/sepolicy/file_contexts

 /tvservice(/.*)?                                       u:object_r:tv_service_file:s0
+/cusdata(/.*)?                                         u:object_r:cusdata_file:s0
+/cusparam(/.*)?                                        u:object_r:cusparam_file:s0
 /dev/block/platform/mstar_mci.0/by-name/tvservice       u:object_r:mstar_tvservice_block_device:s0
+/dev/block/platform/mstar_mci.0/by-name/cusdata       u:object_r:mstar_cusdata_block_device:s0
+/dev/block/platform/mstar_mci.0/by-name/cusparam       u:object_r:mstar_cusparam_block_device:s0

    vendor/mstar/common/sepolicy_non_treble/device.te

 type mstar_tvservice_block_device, dev_type;
+type mstar_cusdata_block_device, dev_type;
+type mstar_cusparam_block_device, dev_type;

    vendor/mstar/common/sepolicy_non_treble/file.te

 type tv_service_file, exec_type, vendor_file_type, file_type;
+type cusdata_file, file_type;
+type cusparam_file, file_type;

    vendor/mstar/common/sepolicy_non_treble/file_contexts

 /tvservice(/.*)?                                        u:object_r:tv_service_file:s0
+/cusdata(/.*)?                                        u:object_r:cusdata_file:s0
+/cusparam(/.*)?                                        u:object_r:cusparam_file:s0
 /dev/block/platform/mstar_mci.0/by-name/tvservice       u:object_r:mstar_tvservice_block_device:s0
+/dev/block/platform/mstar_mci.0/by-name/cusdata       u:object_r:mstar_cusdata_block_device:s0
+/dev/block/platform/mstar_mci.0/by-name/cusparam       u:object_r:mstar_cusparam_block_device:s0

(3)supernova

     vendor/mstar/supernova/projects/board/m7221/target/dvb/customized.mk

 # define ext4 image size need to less than partition size
 TVSERV_EXT4_SIZE = 0x9D00000
-TVCFG_EXT4_SIZE = 0xC00000
+TVCFG_EXT4_SIZE = 0x1000000
 TVCTFC_EXT4_SIZE = 0x800000
 TVCUS_EXT4_SIZE  = 0x1000000
 TVDB_EXT4_SIZE  = 0x800000

  注:如果修改mstar 的supernova 分区的大小,需要在supernova 的 customized.mk 和 BoardConfig.mk 中同时修改大小。

BOARD_TVSERVICEIMAGE_PARTITION_SIZE     := 0x9D000000
BOARD_TVCONFIGIMAGE_PARTITION_SIZE      := 0x01000000
BOARD_TVDATABASEIMAGE_PARTITION_SIZE    := 0x00800000
BOARD_TVCUSTOMERIMAGE_PARTITION_SIZE    := 0x01000000
BOARD_TVCERTIFICATEIMAGE_PARTITION_SIZE := 0x00800000
BOARD_CM4IMAGE_PARTITION_SIZE           := 0x00080000

 

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