1、修改分区大小：
android/vendor/mediatek/proprietary/tools/ptgen/MTxxxx/partition_table_emmc_ab.csv
+carrier,EXT4,51200,,EMMC_USER,,N,N,NONE,N,N,Y,,Y,,AUTO
2、使用宏控控制分区是否增加，以增加carrier分区为例
2.1增加宏开关：
android/device/xxx/L400/ProjectConfig.mk
FEATURE_CARRIER_PARTITION_SUPPORT = yes
android/vendor/mediatek/proprietary/tools/ptgen/common/CommonArg.py
arg_name_list = [
# xxx BEGIN
'FEATURE_CARRIER_PARTITION_SUPPORT', 'xxx_PRJ_DIR',
# xxx END
android/vendor/mediatek/proprietary/tools/ptgen/ptgen.mk
MTK_PTGEN_COMMAND := \
FEATURE_CARRIER_PARTITION_SUPPORT=${FEATURE_CARRIER_PARTITION_SUPPORT}
--- a/mediatek/proprietary/tools/ptgen/common/DeleteRule.py
+++ b/mediatek/proprietary/tools/ptgen/common/DeleteRule.py
@@ -14,6 +14,11 @@ def initRule(ArgList, storage_type):
or (ArgList.argGet('MTK_EMMC_SUPPORT') != "yes" and ArgList.argGet('MTK_UFS_SUPPORT') != "yes" and ArgList.argGet('MTK_FAT_ON_NAND') != "yes")),
'^custom$' : (ArgList.argGet('MTK_CIP_SUPPORT') != "yes"),
'^persist$': ArgList.argGet('MTK_PERSIST_PARTITION_SUPPORT') != "yes",
+ # xxx BEGIN
+ '^carrier$': ArgList.argGet('FEATURE_CARRIER_PARTITION_SUPPORT') != "yes",
+ # xxx END
2.2 增加sepolicy 路径及对应selinux 权限：
这些规则是在添加新分区其它工作就绪后，抓取开机 uart log 中影响开机的 selinux 权限问题而添加的
android/device/xxx/L400/BoardConfig.mk
BOARD_SEPOLICY_DIRS += device/xxx/L400/sepolicy/non_plat
diff --git a/sepolicy/non_plat/device.te b/sepolicy/non_plat/device.te
new file mode 100644
index 0000000..e94af6b
--- /dev/null
+++ b/sepolicy/non_plat/device.te
@@ -0,0 +1,2 @@
+type carrier_block_device, dev_type;
diff --git a/sepolicy/non_plat/e2fs.te b/sepolicy/non_plat/e2fs.te
new file mode 100644
index 0000000..ac7231d
--- /dev/null
+++ b/sepolicy/non_plat/e2fs.te
@@ -0,0 +1,8 @@
+allow e2fs carrier_block_device:blk_file rw_file_perms;
+allowxperm e2fs carrier_block_device:blk_file ioctl {
+ BLKDISCARD BLKPBSZGET BLKDISCARDZEROES BLKROGET
+};
diff --git a/sepolicy/non_plat/file.te b/sepolicy/non_plat/file.te
new file mode 100644
index 0000000..71a714a
--- /dev/null
+++ b/sepolicy/non_plat/file.te
@@ -0,0 +1,3 @@
+type carrier_file, file_type;
+
diff --git a/sepolicy/non_plat/file_contexts b/sepolicy/non_plat/file_contexts
new file mode 100644
index 0000000..8a5ea3c
--- /dev/null
+++ b/sepolicy/non_plat/file_contexts
@@ -0,0 +1,6 @@
+/dev/block/by-name/carrier u:object_r:carrier_block_device:s0
+/carrier(/.*)? u:object_r:carrier_file:s0
+/mnt/carrier(/.*)? u:object_r:carrier_file:s0
diff --git a/sepolicy/non_plat/fsck.te b/sepolicy/non_plat/fsck.te
new file mode 100644
index 0000000..72e6420
--- /dev/null
+++ b/sepolicy/non_plat/fsck.te
@@ -0,0 +1,2 @@
+allow fsck carrier_block_device:blk_file rw_file_perms;
diff --git a/sepolicy/non_plat/init.te b/sepolicy/non_plat/init.te
new file mode 100644
index 0000000..f5ebc8a
--- /dev/null
+++ b/sepolicy/non_plat/init.te
@@ -0,0 +1,2 @@
+allow init carrier_file:dir mounton;
diff --git a/sepolicy/non_plat/vold.te b/sepolicy/non_plat/vold.te
new file mode 100644
index 0000000..fea5dd4
--- /dev/null
+++ b/sepolicy/non_plat/vold.te
@@ -0,0 +1,3 @@
+allow vold carrier_file:dir r_dir_perms;
+
2.3 修改文件节点owner和group
android/device/xxx/L400/init.project.rc
# xxx BEGIN
wait /dev/block/by-name/carrier
chown system system /mnt/carrier
chmod 0771 /mnt/carrier
restorecon_recursive /mnt/carrier
# xxx END
3、mount 设备
android/vendor/mediatek/proprietary/hardware/fstab/Android.mk
ifeq ($(strip $(FEATURE_CARRIER_PARTITION_SUPPORT)),yes)
__CFLAGS += -D__CARRIER_PARTITION_SUPPORT
endif
android/vendor/mediatek/proprietary/hardware/fstab/mtxxxx/fstab.in
#ifdef __CARRIER_PARTITION_SUPPORT
DEVPATH(carrier) /mnt/carrier ext4 FS_FLAG_DISCARD FSMGR_FLAG_FMT
#endif
4、创建软连接
android/system/core/rootdir/Android.mk
# xxx BEGIN
ifeq ($(FEATURE_CARRIER_PARTITION_SUPPORT), yes)
LOCAL_POST_INSTALL_CMD += ; ln -sf /mnt/carrier $(TARGET_ROOT_OUT)/carrier
endif
# xxx END
注意点：
1、修改分区lk大小 一定要保证lk_a lk_b大小都修改，否则会在ota升级时报错：
03-27 06:15:00.581 1192 1192 I update_engine: [INFO:partition_writer.cc(181)] Applying 3 operations to partition "lk"
03-27 06:15:00.657 1192 1192 E update_engine: [ERROR:cached_file_descriptor.cc(90)] Failed to flush cached data!: No space left on device (28)
03-27 06:15:00.659 1192 1192 E update_engine: [ERROR:extent_writer.cc(51)] fd_->Seek(offset, SEEK_SET) != static_cast<off64_t>(-1) failed: No space left on device
03-27 06:15:00.661 1192 1192 E update_engine: [ERROR:file_descriptor_utils.cc(66)] writer->Write(buf.data(), read_blocks * block_size) failed.
03-27 06:15:00.664 1192 1192 E update_engine: [ERROR:delta_performer.cc(195)] Failed to perform SOURCE_COPY operation 28, which is the operation 1 in partition "lk"
03-27 06:15:00.666 1192 1192 E update_engine: [ERROR:download_action.cc(226)] Error ErrorCode::kDownloadOperationExecutionError (28) in DeltaPerformer's Write method when processing the received payload -- Terminating processing
03-27 06:15:00.695 1192 1192 E update_engine: [ERROR:cached_file_descriptor.cc(90)] Failed to flush cached data!: No space left on device (28)
03-27 06:15:00.701 1192 1192 E update_engine: [ERROR:cached_file_descriptor.cc(90)] Failed to flush cached data!: No space left on device (28)
03-27 06:15:00.703 1192 1192 E update_engine: [ERROR:partition_writer.cc(280)] Error closing target partition: No space left on device (28)
2、 6879 6835 平台注意mrdump分区 在user版本会去除，此时要注意：
mrdump,Raw data,33554432,,EMMC_USER,UFS_LU2,,Y,N,NONE,N,N,N,,N,,RESERVED,,"eq(TARGET_BUILD_VARIANT,user)"
3、需注意mrdump分区大小 33554432K = 32G
4、分区实际 size 跟分区表中 Size_KB 不同：
1).请仔细确认是否某个路径下的 BoardConfig.mk 有重新定义分区 size；
2).或者由于对齐需要，对 Size_KB 有做调整。如：8M 对齐。
添加分区注意事项（checklist）：
1、xxx定制所增加的carrier分区是否在最终的软件包scat/rawprogram文件中
2、对于a/b系统，所修改的分区是否全部都有修改到，比如修改了lk_a的大小，对应的lk_b的大小也一定要有修改到
3、对应分区的selinux label是否有修改过来，命令：ls -alZ /mnt
drwxrwx--x 2 system system u:object_r:tmpfs:s0 40 2024-04-07 04:07 carrier
要确认把tmpfs改成需要的值：
drwxrwx--x 3 system system u:object_r:carrier_file:s0 4096 2010-01-01 08:00 carrier
4、lpdump 查看super分区layout，确认总大小是自己的期望值并计算剩余空间确保剩余super剩余空间在500M左右（注意要先导入gms包）
用如下命令计算的：
adb shell pm list packages -f | grep "google" | awk -F ":" '{print $2}' | awk -F "=" '{print $1}' | xargs -i adb shell dirname {} | grep -v "overlay" | xargs -i adb shell du -s -k {}
5、 进入设置->存储查看总大小是否符合项目定义
6、 userdata分区 75%以上
7、 查看根目录下的软链接是否生效
LOCAL_POST_INSTALL_CMD += ; ln -sf /mnt/carrier $(TARGET_ROOT_OUT)/carrier
8、 MTK 异常分区mrdump 检查：
1）、MTK默认user版本去除此分区，userdebug版本升级到user版本时提示要formate，user版本也要保留此分区
2）、MTK默认此分区大小是32G 并且会占用存储总空间，导致设置->存储显示异常
9、更改super分区大小后fota升级问题：（分区由6G改为4.5G后出现的问题）
05-05 16:27:51.382 1756 1756 E update_engine: [ERROR:builder.cpp(1047)] [liblp] Device size does not match (got 4831838208, expected 6442450944)
05-05 16:27:51.389 1756 1756 E update_engine: [ERROR:builder.cpp(1047)] [liblp] Device size does not match (got 4831838208, expected 6442450944)
需要更改配置文件：
BOARD_SUPER_PARTITION_SIZE := 6442450944
BOARD_QTI_DYNAMIC_PARTITIONS_SIZE := 6438256640
动态分区super 分区计算剩余空间
# lpdump
Slot 0:
Metadata version: 10.2
Metadata size: 976 bytes
Metadata max size: 65536 bytes
Metadata slot count: 3
Header flags: virtual_ab_device
Partition table:
------------------------
Name: product_a
Group: main_a
Attributes: readonly
Extents:
0 .. 4902207 linear super 2048
------------------------
Name: product_b
Group: main_b
Attributes: readonly
Extents:
------------------------
Name: system_a
Group: main_a
Attributes: readonly
Extents:
0 .. 4117463 linear super 4904960
------------------------
Name: system_b
Group: main_b
Attributes: readonly
Extents:
------------------------
Name: system_ext_a
Group: main_a
Attributes: readonly
Extents:
0 .. 1536831 linear super 9023488
------------------------
Name: system_ext_b
Group: main_b
Attributes: readonly
Extents:
------------------------
Name: vendor_a
Group: main_a
Attributes: readonly
Extents:
0 .. 946263 linear super 10561536
------------------------
Name: vendor_b
Group: main_b
Attributes: readonly
Extents:
------------------------
Super partition layout:
------------------------
super: 2048 .. 4904256: product_a (4902208 sectors)
super: 4904960 .. 9022424: system_a (4117464 sectors)
super: 9023488 .. 10560320: system_ext_a (1536832 sectors)
super: 10561536 .. 11507800: vendor_a (946264 sectors)
------------------------
Block device table:
------------------------
Partition name: super
First sector: 2048
Size: 8792064000 bytes
Flags: none
------------------------
Group table:
------------------------
Name: default
Maximum size: 0 bytes
Flags: none
------------------------
Name: main_a
Maximum size: 8789966848 bytes
Flags: none
------------------------
Name: main_b
Maximum size: 8789966848 bytes
Flags: none
------------------------
super left space ： (8792064000 - (4902208 + 4117464 + 1536832 + 946264)*512 )/1024/1024/1024.0 = 2.703125 G
如何查看分区大小（block数目，需*512 ）：
adb shell cat sys/class/mmc_host/mmc0/mmc0:0001/block/mmcblk0/size
附 ptgen 编译过程log：
[FAQ28494] ptgen 脚本 与 scatter.txt 生成
https://online.mediatek.com/FAQ#/SW/FAQ28494
首先 打开的是 分区表的 目录 ：
从 R 版本 开始 ： vendor/mediatek/proprietary/tools/ptgen
Q版本及之前： device/mediatek/build/build/tools/ptgen
这个目录下 很多的platform ，common , utils,并且包含着一些与 OTA 相关的脚本文件。
1. 先找到 项目中如何找到对应的分区表：project 找到了对应的 ptgen.mk
2. 了解 common 下 的 ptgen.mk
包含了 storage 的类型支持， feature 对应的 partition 是否开关，这些都会读取 ProjectConfig.mk 的设定来进行选择，也可以确定使用哪个 Platform 中的分区表。
在ptgen.mk 还有一个关键信息：default_ptgen.py ，程序会根据 ProjectConfig.mk的配置来进行生成ptgen。
进入default_ptgen.py 首先看 main 函数123...Com
a. 开始走默认的flow ,选择 EMMC 或 UFS 是否support 来生成对应的
function name Desciptor path(vendor/mediatek/proprietary/tool/ptgen)
DefaultFlow
定义EMMC 或 UFS 是否support，来生成对应的 scatter.txt 依据AlignPartList ，分区是否进行对齐
common/deafult_ptgen.py run_flow
计算 AlignPartList 对齐 下载文件提取 生成scatter文件
生成 GPT 文件 common/deafult_ptgen.py
从log 的角度看，在编译的初期，就会根据BoardConfig.mk 和 ProjectConfig.mk 中的信息，进行生成scatter.txt文件。
以下log是 编译过程中log：
开始ptgen脚本
[ptgen-py] !!!!!!!!!!!!!!!!!!! start !!!!!!!!!!!!!!!!!!!
[ptgen-py] *******************Arguments*********************
针对MTK_PTGEN_COMMAND中的配置进行赋值（ProjectConfig.mk）
[ptgen-py] MTK_PLATFORM = MT6765
[ptgen-py] TARGET_COPY_OUT_ODM_DLKM = ||ODM_DLKM-PATH-PH||
[ptgen-py] MTK_COMBO_NAND_SUPPORT =
[ptgen-py] TARGET_BUILD_VARIANT = userdebug
[ptgen-py] MTK_DPM_SUPPORT =
[ptgen-py] MTK_TINYSYS_SCP_SUPPORT = yes
[ptgen-py] MTK_AUDIODSP_SUPPORT =
分区表的路径打印（根据MTK_AB_OTA_UPDATER 选择 AB 分区的分区表）
[ptgen-py] MTK_AB_OTA_UPDATER = yes
[ptgen-py] layout_path = vendor/mediatek/proprietary/tools/ptgen/MT6765/partition_table_emmc_ab.csv
[ptgen-py] SHEET_NAME = emmc_ab
[ptgen-py] *******************Arguments*********************
[ptgen-py] partition layout file path : vendor/mediatek/proprietary/tools/ptgen/MT6765/partition_table_emmc_ab.csv
根据deleteRule 来确定是否用该分区（runDelRule）
[ptgen-py] frp has deleteRule: ne(MTK_FACTORY_RESET_PROTECTION_SUPPORT,yes) is False
[ptgen-py] md_udc has deleteRule: ne(MTK_BOARD_USES_METADATA_PARTITION,true) is False
[ptgen-py] persist has deleteRule: ne(MTK_PERSIST_PARTITION_SUPPORT,yes) is True
[ptgen-py] efuse has deleteRule: ne(MTK_EFUSE_WRITER_SUPPORT,yes) is True
[ptgen-py] md1dsp_a has deleteRule: eq(MTK_SINGLE_BIN_MODEM_SUPPORT,yes) is True
[ptgen-py] spmfw_a has deleteRule: ne(SPM_FW_USE_PARTITION,yes) is False
[ptgen-py] scp_a has deleteRule: ne(MTK_TINYSYS_SCP_SUPPORT,yes) is False
[ptgen-py] sspm_a has deleteRule: ne(MTK_TINYSYS_SSPM_SUPPORT,yes) is False
[ptgen-py] vendor_boot_a has deleteRule: le(PRODUCT_SHIPPING_API_LEVEL,30) is False
[ptgen-py] tee_a has deleteRule: ne(MTK_ATF_SUPPORT,yes) and ne(MTK_TEE_SUPPORT,yes) is False
[ptgen-py] odm_a has deleteRule: ne(TARGET_COPY_OUT_ODM,odm) is True
[ptgen-py] vbmeta_a has deleteRule: ne(MTK_BOARD_AVB_ENABLE,true) is False
....
计算需要对齐的分区地址（runCalAddr）
ptgen-py] BoardConfig File exists: /worktmp/cas_personal/mtk27529/alps-mp-s0.mp1--2022_02_24_02_00/alps-mp-s0_mp1--2022_02_24_02_00/merged/device/mediateksample/k62v1_64_bsp/BoardConfig.mk
[ptgen-py] Need adjust start address for seccfg, because it is 0x522000 now.pad size is 0x2de000, and pre part [protect2]size is 0xade000
[ptgen-py] Need adjust start address for sec1, because it is 0x80000 now.pad size is 0x780000, and pre part [seccfg]size is 0x800000
[ptgen-py] Need adjust start address for md1img_a, because it is 0x500000 now.pad size is 0x300000, and pre part [logo]size is 0xb00000
[ptgen-py] Need adjust start address for md1img_b, because it is 0x500000 now.pad size is 0x300000, and pre part [vbmeta_vendor_a]size is 0xb00000
[ptgen-py] Need adjust start address for super, because it is 0x500000 now.pad size is 0x300000, and pre part [tee_b]size is 0x800000
生成分区表（genfile_scatter）
[ptgen-py] Gen ymal file in Path out/target/product/k62v1_64_bsp/obj/PTGEN/../../MT6765_Android_scatter.txt
[ptgen-py] Gen xml file in Path out/target/product/k62v1_64_bsp/obj/PTGEN/../../MT6765_Android_scatter.xml
[ptgen-py] Gen partition_size.mk file in Path out/target/product/k62v1_64_bsp/obj/PTGEN/partition_size.mk
根据super分区设定的大小，对动态分区进行设置大小
[ptgen-py] main group size candi:
[ptgen-py] parts_sum := 4328521728
[ptgen-py] group_limit := 4292870144
[ptgen-py] final selected 4292870144
完成分区表设定，进行编译
[ptgen-py] Gen PGPT in Path out/target/product/k62v1_64_bsp/obj/PTGEN/../../PGPT_EMMC
[ptgen-py] !!!!!!!!!!!!!!!!!!! end !!!!!!!!!!!!!!!!!!!
