tequilaOS/platform_system_sepolicy
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Add better per-device sepolicy support.

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This is a rewrite of the existing implementation.
Three new variables are now needed to add/modify
the exisitng base policy. They are, BOARD_SEPOLICY_REPLACE
and BOARD_SEPOLICY_UNION which govern what files
are replaced and concatenated, and BOARD_SEPOLICY_DIRS
which lists the various directories that will contain
the BOARD_SEPOLICY_REPLACE and BOARD_SEPOLICY_UNION
policy files.

Change-Id: Id33381268cef03245c56bc5242fec7da9b6c6493
Signed-off-by: rpcraig <robertpcraig@gmail.com>
This commit is contained in:
rpcraig 2012-10-17 21:09:52 -04:00 committed by Gerrit Code Review
parent d8b122c7bb
commit 47cd396b11
1 changed files with 46 additions and 13 deletions
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59
Android.mk
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@ -12,16 +12,46 @@ POLICYVERS ?= 24
MLS_SENS=1
MLS_CATS=1024
LOCAL_POLICY_DIRS := $(SRC_TARGET_DIR)/board/$(TARGET_DEVICE)/ device/*/$(TARGET_DEVICE)/ vendor/*/$(TARGET_DEVICE)/
# Quick edge case error detection for BOARD_SEPOLICY_REPLACE.
# Builds the singular path for each replace file.
sepolicy_replace_paths :=
$(foreach pf, $(BOARD_SEPOLICY_REPLACE), \
$(if $(filter $(pf), $(BOARD_SEPOLICY_UNION)), \
$(error Ambiguous request for sepolicy $(pf). Appears in both \
BOARD_SEPOLICY_REPLACE and BOARD_SEPOLICY_UNION), \
) \
$(eval _paths := $(wildcard $(addsuffix /$(pf), $(BOARD_SEPOLICY_DIRS)))) \
$(eval _occurrences := $(words $(_paths))) \
$(if $(filter 0,$(_occurrences)), \
$(error No sepolicy file found for $(pf) in $(BOARD_SEPOLICY_DIRS)), \
) \
$(if $(filter 1, $(_occurrences)), \
$(eval sepolicy_replace_paths += $(_paths)), \
$(error Multiple occurrences of replace file $(pf) in $(_paths)) \
) \
$(if $(filter 0, $(words $(wildcard $(addsuffix /$(pf), $(LOCAL_PATH))))), \
$(error Specified the sepolicy file $(pf) in BOARD_SEPOLICY_REPLACE, \
but none found in $(LOCAL_PATH)), \
) \
)
LOCAL_POLICY_FC := $(wildcard $(addsuffix sepolicy.fc, $(LOCAL_POLICY_DIRS)))
LOCAL_POLICY_TE := $(wildcard $(addsuffix sepolicy.te, $(LOCAL_POLICY_DIRS)))
LOCAL_POLICY_PC := $(wildcard $(addsuffix sepolicy.pc, $(LOCAL_POLICY_DIRS)))
LOCAL_POLICY_FS_USE := $(wildcard $(addsuffix sepolicy.fs_use, $(LOCAL_POLICY_DIRS)))
LOCAL_POLICY_PORT_CONTEXTS := $(wildcard $(addsuffix sepolicy.port_contexts, $(LOCAL_POLICY_DIRS)))
LOCAL_POLICY_GENFS_CONTEXTS := $(wildcard $(addsuffix sepolicy.genfs_contexts, $(LOCAL_POLICY_DIRS)))
LOCAL_POLICY_INITIAL_SID_CONTEXTS := $(wildcard $(addsuffix sepolicy.initial_sid_contexts, $(LOCAL_POLICY_DIRS)))
LOCAL_POLICY_SC := $(wildcard $(addsuffix seapp_contexts, $(LOCAL_POLICY_DIRS)))
# Builds paths for all requested policy files w.r.t
# both BOARD_SEPOLICY_REPLACE and BOARD_SEPOLICY_UNION
# product variables.
# $(1): the set of policy name paths to build
build_policy = $(foreach type, $(1), \
$(foreach expanded_type, $(notdir $(wildcard $(addsuffix /$(type), $(LOCAL_PATH)))), \
$(if $(filter $(expanded_type), $(BOARD_SEPOLICY_REPLACE)), \
$(wildcard $(addsuffix $(expanded_type), $(dir $(sepolicy_replace_paths)))), \
$(LOCAL_PATH)/$(expanded_type) \
) \
) \
$(foreach union_policy, $(wildcard $(addsuffix /$(type), $(BOARD_SEPOLICY_DIRS))), \
$(if $(filter $(notdir $(union_policy)), $(BOARD_SEPOLICY_UNION)), \
$(union_policy), \
) \
) \
)
##################################
include $(CLEAR_VARS)
@ -36,7 +66,7 @@ include $(BUILD_SYSTEM)/base_rules.mk
sepolicy_policy.conf := $(intermediates)/policy.conf
$(sepolicy_policy.conf): PRIVATE_MLS_SENS := $(MLS_SENS)
$(sepolicy_policy.conf): PRIVATE_MLS_CATS := $(MLS_CATS)
$(sepolicy_policy.conf) : $(wildcard $(addprefix $(LOCAL_PATH)/,security_classes initial_sids access_vectors global_macros mls_macros mls policy_capabilities te_macros attributes *.te) $(LOCAL_POLICY_TE) $(addprefix $(LOCAL_PATH)/, roles users initial_sid_contexts) $(LOCAL_POLICY_INITIAL_SID_CONTEXTS) $(addprefix $(LOCAL_PATH)/,fs_use) $(LOCAL_POLICY_FS_USE) $(addprefix $(LOCAL_PATH)/,genfs_contexts) $(LOCAL_POLICY_GENFS_CONTEXTS) $(addprefix $(LOCAL_PATH)/,port_contexts) $(LOCAL_POLICY_PORT_CONTEXTS))
$(sepolicy_policy.conf) : $(call build_policy, security_classes initial_sids access_vectors global_macros mls_macros mls policy_capabilities te_macros attributes *.te roles users initial_sid_contexts fs_use genfs_contexts port_contexts)
@mkdir -p $(dir $@)
$(hide) m4 -D mls_num_sens=$(PRIVATE_MLS_SENS) -D mls_num_cats=$(PRIVATE_MLS_CATS) -s $^ > $@
@ -69,7 +99,7 @@ LOCAL_MODULE_PATH := $(TARGET_ROOT_OUT)
include $(BUILD_SYSTEM)/base_rules.mk
ALL_FC_FILES := $(LOCAL_PATH)/file_contexts $(LOCAL_POLICY_FC)
ALL_FC_FILES := $(call build_policy, file_contexts)
$(LOCAL_BUILT_MODULE): PRIVATE_SEPOLICY := $(built_sepolicy)
$(LOCAL_BUILT_MODULE): $(ALL_FC_FILES) $(built_sepolicy) $(HOST_OUT_EXECUTABLES)/checkfc
@ -89,7 +119,7 @@ LOCAL_MODULE_PATH := $(TARGET_ROOT_OUT)
include $(BUILD_SYSTEM)/base_rules.mk
seapp_contexts.tmp := $(intermediates)/seapp_contexts.tmp
$(seapp_contexts.tmp): $(LOCAL_PATH)/seapp_contexts $(LOCAL_POLICY_SC)
$(seapp_contexts.tmp): $(call build_policy, seapp_contexts)
@mkdir -p $(dir $@)
$(hide) m4 -s $^ > $@
@ -111,7 +141,7 @@ LOCAL_MODULE_PATH := $(TARGET_ROOT_OUT)
include $(BUILD_SYSTEM)/base_rules.mk
property_contexts := $(intermediates)/property_contexts
$(property_contexts): $(LOCAL_PATH)/property_contexts $(LOCAL_POLICY_PC)
$(property_contexts): $(call build_policy, property_contexts)
@mkdir -p $(dir $@)
$(hide) m4 -s $^ > $@
@ -142,3 +172,6 @@ LOCAL_SRC_FILES := $(LOCAL_MODULE)
include $(BUILD_PREBUILT)
##################################
build_policy :=
sepolicy_replace_paths :=