sepolicy: Add policy for sdcardfs and configfs

Change-Id: I4c318efba76e61b6ab0be9491c352f281b1c2bff
Bug: 19160983

app.te

@@ -161,6 +161,8 @@ allow appdomain mnt_user_file:lnk_file r_file_perms;
 # Read/write visible storage
 allow appdomain fuse:dir create_dir_perms;
 allow appdomain fuse:file create_file_perms;
+allow appdomain sdcardfs:dir create_dir_perms;
+allow appdomain sdcardfs:file create_file_perms;
 
 # Access OBBs (vfat images) mounted by vold (b/17633509)
 # File write access allowed for FDs returned through Storage Access Framework

file.te

@@ -29,6 +29,7 @@ type sysfs_hwrandom, fs_type, sysfs_type;
 type sysfs_nfc_power_writable, fs_type, sysfs_type, mlstrustedobject;
 type sysfs_wake_lock, fs_type, sysfs_type;
 type sysfs_mac_address, fs_type, sysfs_type;
+type configfs, fs_type;
 # /sys/devices/system/cpu
 type sysfs_devices_system_cpu, fs_type, sysfs_type;
 # /sys/module/lowmemorykiller
@@ -44,6 +45,7 @@ type tmpfs, fs_type;
 type shm, fs_type;
 type mqueue, fs_type;
 type fuse, sdcard_type, fs_type, mlstrustedobject;
+type sdcardfs, sdcard_type, fs_type, mlstrustedobject;
 type vfat, sdcard_type, fs_type, mlstrustedobject;
 typealias fuse alias sdcard_internal;
 typealias vfat alias sdcard_external;

genfs_contexts

@@ -37,6 +37,8 @@ genfscon vfat / u:object_r:vfat:s0
 genfscon debugfs / u:object_r:debugfs:s0
 genfscon tracefs / u:object_r:debugfs_tracing:s0
 genfscon fuse / u:object_r:fuse:s0
+genfscon configfs / u:object_r:configfs:s0
+genfscon sdcardfs / u:object_r:sdcardfs:s0
 genfscon pstore / u:object_r:pstorefs:s0
 genfscon functionfs / u:object_r:functionfs:s0
 genfscon usbfs / u:object_r:usbfs:s0

init.te

@@ -61,6 +61,10 @@ allow init tmpfs:dir mounton;
 allow init cgroup:dir create_dir_perms;
 allow init cpuctl_device:dir { create mounton };
 
+# /config
+allow init configfs:dir mounton;
+allow init configfs:dir create_dir_perms;
+
 # Use tmpfs as /data, used for booting when /data is encrypted
 allow init tmpfs:dir relabelfrom;
 

system_server.te

@@ -440,6 +440,10 @@ userdebug_or_eng(`
 allow system_server vold:fd use;
 allow system_server fuse_device:chr_file { read write ioctl getattr };
 
+# For configuring sdcardfs
+allow system_server configfs:dir { create_dir_perms };
+allow system_server configfs:file { getattr open unlink write };
+
 # Connect to adbd and use a socket transferred from it.
 # Used for e.g. jdwp.
 allow system_server adbd:unix_stream_socket connectto;

untrusted_app.te

@@ -150,6 +150,7 @@ neverallow untrusted_app { cache_file cache_recovery_file }:file ~{ read getattr
 neverallow untrusted_app {
   fs_type
   -fuse                     # sdcard
+  -sdcardfs                 # sdcard
   file_type
   -app_data_file            # The apps sandbox itself
   -media_rw_data_file       # Internal storage. Known that apps can

zygote.te

@@ -52,6 +52,7 @@ allow zygote proc_cpuinfo:file mounton;
 allow zygote rootfs:dir mounton;
 allow zygote tmpfs:filesystem { mount unmount };
 allow zygote fuse:filesystem { unmount };
+allow zygote sdcardfs:filesystem { unmount };
 
 # Allowed to create user-specific storage source if started before vold
 allow zygote mnt_user_file:dir create_dir_perms;