{"id":33,"date":"2024-06-17T10:48:30","date_gmt":"2024-06-17T02:48:30","guid":{"rendered":"https:\/\/www.swreader.com\/?p=33"},"modified":"2024-06-17T10:53:21","modified_gmt":"2024-06-17T02:53:21","slug":"android-vendor-selinux-policy%e7%bc%96%e8%af%91%e8%bf%87%e7%a8%8b%e5%88%86%e6%9e%90","status":"publish","type":"post","link":"https:\/\/www.swreader.com\/index.php\/2024\/06\/17\/android-vendor-selinux-policy%e7%bc%96%e8%af%91%e8%bf%87%e7%a8%8b%e5%88%86%e6%9e%90\/","title":{"rendered":"Android Vendor SELinux Policy\u7f16\u8bd1\u8fc7\u7a0b\u5206\u6790"},"content":{"rendered":"

\u81ea\u4eceAndroid 8\u5f15\u5165Treble\u6846\u67b6\u540e\uff0cAndroid\u5c06System\u548cVendor\u5206\u4e3a\u4e24\u4e2a\u90e8\u5206\uff0c\u5141\u8bb8\u72ec\u7acb\u5347\u7ea7system\u548cvendor\uff0c\u968f\u540e\u5f15\u5165\u4e86Product\u3001ODM\u7b49\u5206\u533a\u3002\u5728\u8fd9\u6837\u7684\u80cc\u666f\u4e0b\uff0cSELinux\u89c4\u5219\u4e5f\u88ab\u5212\u5206\u4e3aplatform\uff08system\uff09\u3001system_ext\u3001product\u3001vendor\u548codm\u51e0\u4e2a\u90e8\u5206\u3002<\/p>\n

\u672c\u6587\u4ee5Vendor\u5206\u533a\u4e3a\u4f8b\uff0c\u8be6\u7ec6\u5206\u6790\u4e86\u5982\u4f55\u5c06sepolicy\u6587\u4ef6\u5305\u542b\u5230Android\u7f16\u8bd1\u7cfb\u7edf\u4e2d\uff0c\u4ee5\u53caAndroid.mk\u7684\u53d8\u91cf\u5982\u4f55\u4f20\u9012\u5230Soong\u7f16\u8bd1\u7cfb\u7edf\uff0c\u5e76\u6700\u7ec8\u5982\u4f55\u4e0eAndroid.bp\u4e2d\u7684\u6a21\u5757\u548c\u53d8\u91cf\u76f8\u5bf9\u5e94\u3002<\/p>\n

1. Android Makefile\u4e2d include SELinux policy\u6587\u4ef6<\/h2>\n

\u9996\u5148\uff0cVendor\u7684SELinux\u7b56\u7565\u6587\u4ef6\u901a\u8fc7 BOARD_VENDOR_SEPOLICY_DIRS<\/code> \u6216\u8005 BOARD_SEPOLICY_DIRS<\/code> \u53d8\u91cf\u6dfb\u52a0\u5230Android\u7684\u7f16\u8bd1\u7cfb\u7edf\u4e2d\u3002\u4f8b\u5982\uff1a<\/p>\n

BOARD_VENDOR_SEPOLICY_DIRS += vendor\/xx\/featureA\/sepolicy<\/code><\/pre>\n
2. Android Makefile\u53d8\u91cf\u4f20\u9012\u7ed9Soong<\/h2>\n
\u8fd9\u4e9bMakefile\u53d8\u91cf\u901a\u8fc7 soong_config.mk<\/code> \u88ab\u8f6c\u6362\u4e3aJSON\u683c\u5f0f\uff0c\u7136\u540e\u4f20\u9012\u7ed9Soong\u7f16\u8bd1\u7cfb\u7edf\uff0c\u6307\u5b9a\u76f8\u5e94\u7684Go\u8bed\u8a00\u53d8\u91cf\uff08\u4f8b\u5982 BoardVendorSepolicyDirs<\/code>\uff09\u3002<\/p>\n
.\/build\/make\/core\/soong_config.mk:203: $(call add_json_list, BoardVendorSepolicyDirs, $(BOARD_VENDOR_SEPOLICY_DIRS) $(BOARD_SEPOLICY_DIRS))<\/code><\/pre>\n
3. Soong\u4e2d\u53d8\u91cf\u7684\u58f0\u660e<\/h2>\n
\u5728Soong\u7684 variable.go<\/code> \u6587\u4ef6\u4e2d\uff0c\u5b9a\u4e49\u4e86\u5b58\u50a8Vendor SELinux\u7b56\u7565\u6587\u4ef6\u8def\u5f84\u7684\u53d8\u91cf\u3002<\/p>\n
.\/build\/soong\/android\/variable.go:355: BoardVendorSepolicyDirs []string `json:",omitempty"`<\/code><\/pre>\n
4. \u83b7\u53d6Vendor\u7b56\u7565\u8def\u5f84\u7684\u63a5\u53e3<\/h2>\n
Soong\u63d0\u4f9b\u4e86\u63a5\u53e3\u6765\u83b7\u53d6Vendor\u7b56\u7565\u6587\u4ef6\u7684\u8def\u5f84\u5217\u8868\u3002<\/p>\n
func (c *deviceConfig) VendorSepolicyDirs() []string {\n    return c.config.productVariables.BoardVendorSepolicyDirs\n}<\/code><\/pre>\n
5. Android.bp\u4e2d\u53d8\u91cf\u4e0eMakefile\u4e2dSELinux\u53d8\u91cf\u7684\u5bf9\u5e94\u5173\u7cfb<\/h2>\n
\u5728Android\u7f16\u8bd1\u7cfb\u7edf\u7684 build\/soong\/build_files.go<\/code> \u6587\u4ef6\u4e2d\uff0c\u5b9e\u73b0\u4e86Android.bp\u4e2d\u53d8\u91cf\u4e0eMakefile\u4e2dSELinux\u53d8\u91cf\u7684\u6620\u5c04\u5173\u7cfb\u3002<\/p>\n
func (b *buildFiles) GenerateAndroidBuildActions(ctx android.ModuleContext) {\n    b.srcs = make(map[string]android.Paths)\n    b.srcs[".reqd_mask"] = b.findSrcsInDirs(ctx, filepath.Join(ctx.ModuleDir(), "reqd_mask"))\n    b.srcs[".plat_public"] = b.findSrcsInDirs(ctx, filepath.Join(ctx.ModuleDir(), "public"))\n    b.srcs[".plat_private"] = b.findSrcsInDirs(ctx, filepath.Join(ctx.ModuleDir(), "private"))\n    b.srcs[".plat_vendor"] = b.findSrcsInDirs(ctx, filepath.Join(ctx.ModuleDir(), "vendor"))\n    b.srcs[".system_ext_public"] = b.findSrcsInDirs(ctx, ctx.DeviceConfig().SystemExtPublicSepolicyDirs()...)\n    b.srcs[".system_ext_private"] = b.findSrcsInDirs(ctx, ctx.DeviceConfig().SystemExtPrivateSepolicyDirs()...)\n    b.srcs[".product_public"] = b.findSrcsInDirs(ctx, ctx.Config().ProductPublicSepolicyDirs()...)\n    b.srcs[".product_private"] = b.findSrcsInDirs(ctx, ctx.Config().ProductPrivateSepolicyDirs()...)\n    b.srcs[".vendor"] = b.findSrcsInDirs(ctx, ctx.DeviceConfig().VendorSepolicyDirs()...)\n    b.srcs[".odm"] = b.findSrcsInDirs(ctx, ctx.DeviceConfig().OdmSepolicyDirs()...)\n\n    if ctx.DeviceConfig().PlatformSepolicyVersion() == ctx.DeviceConfig().BoardSepolicyVers() {\n        \/\/ vendor uses the same source with plat policy\n        b.srcs[".reqd_mask_for_vendor"] = b.srcs[".reqd_mask"]\n        b.srcs[".plat_vendor_for_vendor"] = b.srcs[".plat_vendor"]\n        b.srcs[".plat_public_for_vendor"] = b.srcs[".plat_public"]\n        b.srcs[".plat_private_for_vendor"] = b.srcs[".plat_private"]\n        b.srcs[".system_ext_public_for_vendor"] = b.srcs[".system_ext_public"]\n        b.srcs[".system_ext_private_for_vendor"] = b.srcs[".system_ext_private"]\n        b.srcs[".product_public_for_vendor"] = b.srcs[".product_public"]\n        b.srcs[".product_private_for_vendor"] = b.srcs[".product_private"]\n    } else {\n        \/\/ use vendor-supplied plat prebuilts\n        b.srcs[".reqd_mask_for_vendor"] = b.findSrcsInDirs(ctx, ctx.DeviceConfig().BoardReqdMaskPolicy()...)\n        b.srcs[".plat_vendor_for_vendor"] = b.findSrcsInDirs(ctx, ctx.DeviceConfig().BoardPlatVendorPolicy()...)\n        b.srcs[".plat_public_for_vendor"] = b.findSrcsInDirs(ctx, filepath.Join(ctx.ModuleDir(), "prebuilts", "api", ctx.DeviceConfig().BoardSepolicyVers(), "public"))\n        b.srcs[".plat_private_for_vendor"] = b.findSrcsInDirs(ctx, filepath.Join(ctx.ModuleDir(), "prebuilts", "api", ctx.DeviceConfig().BoardSepolicyVers(), "private"))\n        b.srcs[".system_ext_public_for_vendor"] = b.findSrcsInDirs(ctx, ctx.DeviceConfig().BoardSystemExtPublicPrebuiltDirs()...)\n        b.srcs[".system_ext_private_for_vendor"] = b.findSrcsInDirs(ctx, ctx.DeviceConfig().BoardSystemExtPrivatePrebuiltDirs()...)\n        b.srcs[".product_public_for_vendor"] = b.findSrcsInDirs(ctx, ctx.DeviceConfig().BoardProductPublicPrebuiltDirs()...)\n        b.srcs[".product_private_for_vendor"] = b.findSrcsInDirs(ctx, ctx.DeviceConfig().BoardProductPrivatePrebuiltDirs()...)\n    }\n}<\/code><\/pre>\n
\u5728\u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0c b.srcs[xxx]<\/code> \u4e2d\u7684 xxx<\/code> \u662fAndroid.bp\u4e2d\u7684\u53d8\u91cf\uff0c\u53ef\u4ee5\u76f4\u63a5\u5728Android.bp\u6587\u4ef6\u4e2d\u4f7f\u7528\u3002\u56e0\u6b64\uff0c\u603b\u7ed3\u5982\u4e0b\u8868\u6240\u793a\uff0c\u5176\u4e2d\u524d\u56db\u4e2a\u53d8\u91cf\u662fAndroid\u5e73\u53f0\u9ed8\u8ba4\u63d0\u4f9b\u7684\uff0cVendor\u5382\u5546\u65e0\u6cd5\u5b9a\u5236\u3002<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Android.bp<\/th>\n\u5bf9\u5e94\u7684Android.mk\u53d8\u91cf\u6216\u4ee3\u7801\u76ee\u5f55<\/th>\n<\/tr>\n<\/thead>\n
.reqd_mask<\/td>\nsystem\/sepolicy\/reqd_mask<\/td>\n<\/tr>\n
.plat_public<\/td>\nsystem\/sepolicy\/public<\/td>\n<\/tr>\n
.plat_private<\/td>\nsystem\/sepolicy\/private<\/td>\n<\/tr>\n
.plat_vendor<\/td>\nsystem\/sepolicy\/vendor<\/td>\n<\/tr>\n
.system_ext_public<\/td>\n$(SYSTEM_EXT_PUBLIC_SEPOLICY_DIRS) $(BOARD_PLAT_PUBLIC_SEPOLICY_DIR)<\/td>\n<\/tr>\n
.system_ext_private<\/td>\n$(SYSTEM_EXT_PRIVATE_SEPOLICY_DIRS) $(BOARD_PLAT_PRIVATE_SEPOLICY_DIR)<\/td>\n<\/tr>\n
.product_public<\/td>\n$(PRODUCT_PUBLIC_SEPOLICY_DIRS)<\/td>\n<\/tr>\n
.product_private<\/td>\n$(PRODUCT_PRIVATE_SEPOLICY_DIRS)<\/td>\n<\/tr>\n
.vendor<\/td>\n$(BOARD_VENDOR_SEPOLICY_DIRS) $(BOARD_SEPOLICY_DIRS)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\u5982\u679c BOARD_SEPOLICY_VERS<\/code> \u548c PLATFORM_SEPOLICY_VERSION<\/code> \u76f8\u7b49\uff0c\u8868\u793aVendor\u4f7f\u7528\u5f53\u524d\u5e73\u53f0\u7684SELinux\u89c4\u5219\uff1b\u5426\u5219\u4f7f\u7528 BOARD_SEPOLICY_VERS<\/code> \u6307\u5b9a\u7684SELinux\u89c4\u5219\u3002\u5728\u76f8\u7b49\u60c5\u51b5\u4e0b\uff0c\u76f8\u5173Android.bp\u4e2d\u7684SELinux\u7b56\u7565\u53d8\u91cf\u53ef\u4ee5\u7b80\u5316\u4e3a\u4ee5\u4e0b\u5f62\u5f0f\uff1a<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
Android.bp<\/th>\n\u53d6\u503c<\/th>\n<\/tr>\n<\/thead>\n
.reqd_mask_for_vendor<\/td>\n.reqd_mask<\/td>\n<\/tr>\n
.plat_public_for_vendor<\/td>\n.plat_public<\/td>\n<\/tr>\n
.plat_private_for_vendor<\/td>\n.plat_private<\/td>\n<\/tr>\n
.plat_vendor_for_vendor<\/td>\n.plat_vendor<\/td>\n<\/tr>\n
.system_ext_public_for_vendor<\/td>\n.system_ext_public<\/td>\n<\/tr>\n
.system_ext_private_for_vendor<\/td>\n.system_ext_private<\/td>\n<\/tr>\n
.product_public_for_vendor<\/td>\n.product_public<\/td>\n<\/tr>\n
.product_private_for_vendor<\/td>\n.product_private<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
6. plat_policy_for_vendor \u6a21\u5757\u7684\u7f16\u8bd1<\/h2>\n
plat_policy_for_vendor\u7684\u6700\u7ec8\u7f16\u8bd1\u751f\u6210\u662fplat_policy_for_vendor.cli\u6587\u4ef6\uff0cplat_policy_for_vendor.cli\u6587\u4ef6\u4f9d\u8d56plat_policy_for_vendor.conf\u6587\u4ef6\uff0c plat_policy_for_vendor.conf\u7684\u7f16\u8bd1\u8fc7\u7a0b\u5982\u4e0b\uff1a<\/p>\n
se_policy_conf {\n    name: "plat_policy_for_vendor.conf",\n    srcs: plat_policies_for_vendor,\n    installable: false,\n}<\/code><\/pre>\n
plat_policies_for_vendor\u5982\u4e0b\uff1a<\/p>\n
plat_policies_for_vendor = [\n    ":se_build_files{.plat_public_for_vendor}",\n    ":se_build_files{.plat_private_for_vendor}",\n    ":se_build_files{.system_ext_public_for_vendor}",\n    ":se_build_files{.system_ext_private_for_vendor}",\n    ":se_build_files{.product_public_for_vendor}",\n    ":se_build_files{.product_private_for_vendor}",\n]<\/code><\/pre>\n
\u53ef\u4ee5\u770b\u5230\uff0cplat_policy_for_vendor\u7684\u7f16\u8bd1\u8fc7\u7a0b\u4e0d\u4f1a\u4f7f\u7528plat_vendor_for_vendor\u4e2d\u5b9a\u4e49\u7684sepolicy\u6587\u4ef6\uff0c\u6240\u4ee5\u5982\u679c\u5728system_ext_public_for_vendor\u4e2d\u589e\u52a0\u4e86\u4e00\u4e2a\u89c4\u5219\uff0c\u4f46\u662f\u65b0\u589e\u7684\u89c4\u5219\u4f9d\u8d56plat_vendor_for_vendor\u4e2d\u7684type\uff0c\u80af\u5b9a\u4f1a\u7f16\u8bd1\u51fa\u9519\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u81ea\u4eceAndroid 8\u5f15\u5165Treble\u6846\u67b6\u540e\uff0cAndroid\u5c06System\u548cVendor\u5206\u4e3a\u4e24\u4e2a\u90e8\u5206\uff0c\u5141\u8bb8\u72ec\u7acb\u5347\u7ea7system\u548cvendor\uff0c\u968f\u540e\u5f15\u5165\u4e86Product\u3001ODM\u7b49\u5206\u533a\u3002\u5728\u8fd9\u6837\u7684\u80cc\u666f\u4e0b\uff0cSELinux\u89c4\u5219\u4e5f\u88ab\u5212\u5206\u4e3aplatform\uff08system\uff09\u3001system_ext\u3001product\u3001vendor\u548codm\u51e0\u4e2a\u90e8\u5206\u3002 \u672c\u6587\u4ee5Vendor\u5206\u533a\u4e3a\u4f8b\uff0c\u8be6\u7ec6\u5206\u6790\u4e86\u5982\u4f55\u5c06sepolicy\u6587\u4ef6\u5305\u542b\u5230Android\u7f16\u8bd1\u7cfb\u7edf\u4e2d\uff0c\u4ee5\u53caAndroid.mk\u7684\u53d8\u91cf\u5982\u4f55\u4f20\u9012\u5230Soong\u7f16\u8bd1\u7cfb\u7edf\uff0c\u5e76\u6700\u7ec8\u5982\u4f55\u4e0eAndroid.bp\u4e2d\u7684\u6a21\u5757\u548c\u53d8\u91cf\u76f8\u5bf9\u5e94\u3002 1. Android Makefile\u4e2d include SELinux policy\u6587\u4ef6 \u9996\u5148\uff0cVendor\u7684SELinux\u7b56\u7565\u6587\u4ef6\u901a\u8fc7 BOARD_VENDOR_SEPOLICY_DIRS \u6216\u8005 BOARD_SEPOLICY_DIRS \u53d8\u91cf\u6dfb\u52a0\u5230Android\u7684\u7f16\u8bd1\u7cfb\u7edf\u4e2d\u3002\u4f8b\u5982\uff1a BOARD_VENDOR_SEPOLICY_DIRS += vendor\/xx\/featureA\/sepolicy 2. Android Makefile\u53d8\u91cf\u4f20\u9012\u7ed9Soong \u8fd9\u4e9bMakefile\u53d8\u91cf\u901a\u8fc7 soong_config.mk \u88ab\u8f6c\u6362\u4e3aJSON\u683c\u5f0f\uff0c\u7136\u540e\u4f20\u9012\u7ed9Soong\u7f16\u8bd1\u7cfb\u7edf\uff0c\u6307\u5b9a\u76f8\u5e94\u7684Go\u8bed\u8a00\u53d8\u91cf\uff08\u4f8b\u5982 BoardVendorSepolicyDirs\uff09\u3002 .\/build\/make\/core\/soong_config.mk:203: $(call add_json_list, BoardVendorSepolicyDirs, $(BOARD_VENDOR_SEPOLICY_DIRS) $(BOARD_SEPOLICY_DIRS)) 3. Soong\u4e2d\u53d8\u91cf\u7684\u58f0\u660e \u5728Soong\u7684 variable.go \u6587\u4ef6\u4e2d\uff0c\u5b9a\u4e49\u4e86\u5b58\u50a8Vendor SELinux\u7b56\u7565\u6587\u4ef6\u8def\u5f84\u7684\u53d8\u91cf\u3002 .\/build\/soong\/android\/variable.go:355: BoardVendorSepolicyDirs []string `json:",omitempty"` 4. \u83b7\u53d6Vendor\u7b56\u7565\u8def\u5f84\u7684\u63a5\u53e3 Soong\u63d0\u4f9b\u4e86\u63a5\u53e3\u6765\u83b7\u53d6Vendor\u7b56\u7565\u6587\u4ef6\u7684\u8def\u5f84\u5217\u8868\u3002 func (c *deviceConfig) VendorSepolicyDirs() []string { return c.config.productVariables.BoardVendorSepolicyDirs } 5. Android.bp\u4e2d\u53d8\u91cf\u4e0eMakefile\u4e2dSELinux\u53d8\u91cf\u7684\u5bf9\u5e94\u5173\u7cfb \u5728Android\u7f16\u8bd1\u7cfb\u7edf\u7684 build\/soong\/build_files.go \u6587\u4ef6\u4e2d\uff0c\u5b9e\u73b0\u4e86Android.bp\u4e2d\u53d8\u91cf\u4e0eMakefile\u4e2dSELinux\u53d8\u91cf\u7684\u6620\u5c04\u5173\u7cfb\u3002 func (b *buildFiles) GenerateAndroidBuildActions(ctx android.ModuleContext) { b.srcs = make(map[string]android.Paths) b.srcs[".reqd_mask"] = b.findSrcsInDirs(ctx, filepath.Join(ctx.ModuleDir(), "reqd_mask")) b.srcs[".plat_public"] = b.findSrcsInDirs(ctx, filepath.Join(ctx.ModuleDir(), "public")) b.srcs[".plat_private"] = b.findSrcsInDirs(ctx, filepath.Join(ctx.ModuleDir(), "private")) b.srcs[".plat_vendor"] = b.findSrcsInDirs(ctx, filepath.Join(ctx.ModuleDir(), "vendor")) b.srcs[".system_ext_public"] = b.findSrcsInDirs(ctx, ctx.DeviceConfig().SystemExtPublicSepolicyDirs()…) b.srcs[".system_ext_private"] = b.findSrcsInDirs(ctx, ctx.DeviceConfig().SystemExtPrivateSepolicyDirs()…) b.srcs[…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[3,13],"tags":[14,15,5,11,12,16],"class_list":["post-33","post","type-post","status-publish","format-standard","hentry","category-android","category-selinux","tag-android","tag-android-build","tag-linux","tag-selinux","tag-sepolicy","tag-soong"],"yoast_head":"\nAndroid Vendor SELinux Policy\u7f16\u8bd1\u8fc7\u7a0b\u5206\u6790 - 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