platform_system_sepolicy/private/halserverdomain.te

###
### Rules for all domains which offer a HAL service over HwBinder
###

# Register the HAL service with hwservicemanager
hwbinder_use(halserverdomain)

# Find HAL implementations
allow halserverdomain system_file:dir r_dir_perms;

# Used to wait for hwservicemanager
get_prop(halserverdomain, hwservicemanager_prop)
Use _client and _server for Audio HAL policy This starts the switch for HAL policy to the approach where: * domains which are clients of Foo HAL are associated with hal_foo_client attribute, * domains which offer the Foo HAL service over HwBinder are associated with hal_foo_server attribute, * policy needed by the implementation of Foo HAL service is written against the hal_foo attribute. This policy is granted to domains which offer the Foo HAL service over HwBinder and, if Foo HAL runs in the so-called passthrough mode (inside the process of each client), also granted to all domains which are clients of Foo HAL. hal_foo is there to avoid duplicating the rules for hal_foo_client and hal_foo_server to cover the passthrough/in-process Foo HAL and binderized/out-of-process Foo HAL cases. A benefit of associating all domains which are clients of Foo HAL with hal_foo (when Foo HAL is in passthrough mode) is that this removes the need for device-specific policy to be able to reference these domains directly (in order to add device-specific allow rules). Instead, device-specific policy only needs to reference hal_foo and should no longer need to care which particular domains on the device are clients of Foo HAL. This can be seen in simplification of the rules for audioserver domain which is a client of Audio HAL whose policy is being restructured in this commit. This commit uses Audio HAL as an example to illustrate the approach. Once this commit lands, other HALs will also be switched to this approach. Test: Google Play Music plays back radios Test: Google Camera records video with sound and that video is then successfully played back with sound Test: YouTube app plays back clips with sound Test: YouTube in Chrome plays back clips with sound Bug: 34170079 Change-Id: I2597a046753edef06123f0476c2ee6889fc17f20 2017-02-13 23:40:49 +01:00			`###`
			`### Rules for all domains which offer a HAL service over HwBinder`
			`###`

			`# Register the HAL service with hwservicemanager`
			`hwbinder_use(halserverdomain)`

			`# Find HAL implementations`
			`allow halserverdomain system_file:dir r_dir_perms;`
Allow hals to read hwservicemanager prop. Test: no relevant denials on marlin while booting Test: no relevant denials on angler while booting Bug: 36278706 Change-Id: Ieba79e1c8fca4f74c63bc63e6dd0bdcf59204ca2 2017-03-22 17:16:49 +01:00
			`# Used to wait for hwservicemanager`
			`get_prop(halserverdomain, hwservicemanager_prop)`