Move file labeling to genfs_contexts.

This should improve performance, as file_contexts is slower than
genfs_contexts.

Bug: 62413700
Test: Built, flashed, and booted Sailfish.  Verified that the
files have the correct context and that wifi, web, and atrace work.

Merged-In: Ia28707ec565a0792bc882fbffe9e8ab9968535f5
Change-Id: I9546f3af3c95e3443684ae4764881b69987611ef

private/file_contexts

@@ -419,60 +419,6 @@
 # LocalTransport (backup) uses this subtree
 /data/cache/backup(/.*)?	u:object_r:cache_private_backup_file:s0
 
-#############################
-# sysfs files
-#
-/sys/class/leds(/.*)?                        u:object_r:sysfs_leds:s0
-/sys/devices/platform/nfc-power/nfc_power -- u:object_r:sysfs_nfc_power_writable:s0
-/sys/devices/system/cpu(/.*)?    u:object_r:sysfs_devices_system_cpu:s0
-/sys/devices/virtual/block/zram\d+(/.*)?     u:object_r:sysfs_zram:s0
-/sys/devices/virtual/block/zram\d+/uevent    u:object_r:sysfs_zram_uevent:s0
-/sys/devices/virtual/misc/hw_random(/.*)?    u:object_r:sysfs_hwrandom:s0
-/sys/power/wake_lock -- u:object_r:sysfs_wake_lock:s0
-/sys/power/wake_unlock -- u:object_r:sysfs_wake_lock:s0
-/sys/kernel/uevent_helper --	u:object_r:usermodehelper:s0
-/sys/module/lowmemorykiller(/.*)? -- u:object_r:sysfs_lowmemorykiller:s0
-/sys/module/wlan/parameters/fwpath u:object_r:sysfs_wlan_fwpath:s0
-/sys/devices/virtual/timed_output/vibrator/enable u:object_r:sysfs_vibrator:s0
-
-#############################
-# debugfs files
-#
-/sys/kernel/debug/mmc0(/.*)?                            u:object_r:debugfs_mmc:s0
-
-#############################
-# tracefs files
-#
-/sys/kernel(/debug)?/tracing/buffer_size_kb                                         u:object_r:tracing_shell_writable:s0
-/sys/kernel(/debug)?/tracing/events/binder/binder_locked/enable                     u:object_r:tracing_shell_writable:s0
-/sys/kernel(/debug)?/tracing/events/binder/binder_lock/enable                       u:object_r:tracing_shell_writable:s0
-/sys/kernel(/debug)?/tracing/events/binder/binder_transaction/enable                u:object_r:tracing_shell_writable:s0
-/sys/kernel(/debug)?/tracing/events/binder/binder_transaction_received/enable       u:object_r:tracing_shell_writable:s0
-/sys/kernel(/debug)?/tracing/events/binder/binder_unlock/enable                     u:object_r:tracing_shell_writable:s0
-/sys/kernel(/debug)?/tracing/events/cpufreq_interactive/enable                      u:object_r:tracing_shell_writable:s0
-/sys/kernel(/debug)?/tracing/events/power/clock_set_rate/enable                     u:object_r:tracing_shell_writable:s0
-/sys/kernel(/debug)?/tracing/events/power/cpu_frequency/enable                      u:object_r:tracing_shell_writable:s0
-/sys/kernel(/debug)?/tracing/events/power/cpu_frequency_limits/enable               u:object_r:tracing_shell_writable:s0
-/sys/kernel(/debug)?/tracing/events/power/cpu_idle/enable                           u:object_r:tracing_shell_writable:s0
-/sys/kernel(/debug)?/tracing/events/sched/sched_blocked_reason/enable               u:object_r:tracing_shell_writable:s0
-/sys/kernel(/debug)?/tracing/events/sched/sched_cpu_hotplug/enable                  u:object_r:tracing_shell_writable:s0
-/sys/kernel(/debug)?/tracing/events/sched/sched_switch/enable                       u:object_r:tracing_shell_writable:s0
-/sys/kernel(/debug)?/tracing/events/sched/sched_wakeup/enable                       u:object_r:tracing_shell_writable:s0
-/sys/kernel(/debug)?/tracing/events/vmscan/mm_vmscan_direct_reclaim_begin/enable    u:object_r:tracing_shell_writable:s0
-/sys/kernel(/debug)?/tracing/events/vmscan/mm_vmscan_direct_reclaim_end/enable      u:object_r:tracing_shell_writable:s0
-/sys/kernel(/debug)?/tracing/events/vmscan/mm_vmscan_kswapd_sleep/enable            u:object_r:tracing_shell_writable:s0
-/sys/kernel(/debug)?/tracing/events/vmscan/mm_vmscan_kswapd_wake/enable             u:object_r:tracing_shell_writable:s0
-/sys/kernel(/debug)?/tracing/instances(/.*)?                                        u:object_r:debugfs_tracing_instances:s0
-/sys/kernel(/debug)?/tracing/instances/wifi/free_buffer                             u:object_r:debugfs_wifi_tracing:s0
-/sys/kernel(/debug)?/tracing/instances/wifi/trace                                   u:object_r:debugfs_wifi_tracing:s0
-/sys/kernel(/debug)?/tracing/instances/wifi/tracing_on                              u:object_r:debugfs_wifi_tracing:s0
-/sys/kernel(/debug)?/tracing/options/overwrite                                      u:object_r:tracing_shell_writable:s0
-/sys/kernel(/debug)?/tracing/options/print-tgid                                     u:object_r:tracing_shell_writable:s0
-/sys/kernel(/debug)?/tracing/trace                                                  u:object_r:tracing_shell_writable:s0
-/sys/kernel(/debug)?/tracing/trace_clock                                            u:object_r:tracing_shell_writable:s0
-/sys/kernel(/debug)?/tracing/trace_marker                                           u:object_r:debugfs_trace_marker:s0
-/sys/kernel(/debug)?/tracing/tracing_on                                             u:object_r:tracing_shell_writable:s0
-
 #############################
 # asec containers
 /mnt/asec(/.*)?             u:object_r:asec_apk_file:s0

private/genfs_contexts

@@ -48,6 +48,66 @@ genfscon selinuxfs / u:object_r:selinuxfs:s0
 genfscon cgroup / u:object_r:cgroup:s0
 # sysfs labels can be set by userspace.
 genfscon sysfs / u:object_r:sysfs:s0
+genfscon sysfs /devices/system/cpu u:object_r:sysfs_devices_system_cpu:s0
+genfscon sysfs /class/leds                        u:object_r:sysfs_leds:s0
+genfscon sysfs /devices/platform/nfc-power/nfc_power u:object_r:sysfs_nfc_power_writable:s0
+genfscon sysfs /devices/virtual/block/zram0     u:object_r:sysfs_zram:s0
+genfscon sysfs /devices/virtual/block/zram1     u:object_r:sysfs_zram:s0
+genfscon sysfs /devices/virtual/block/zram0/uevent    u:object_r:sysfs_zram_uevent:s0
+genfscon sysfs /devices/virtual/block/zram1/uevent    u:object_r:sysfs_zram_uevent:s0
+genfscon sysfs /devices/virtual/misc/hw_random    u:object_r:sysfs_hwrandom:s0
+genfscon sysfs /power/wake_lock u:object_r:sysfs_wake_lock:s0
+genfscon sysfs /power/wake_unlock u:object_r:sysfs_wake_lock:s0
+genfscon sysfs /kernel/uevent_helper u:object_r:usermodehelper:s0
+genfscon sysfs /module/lowmemorykiller u:object_r:sysfs_lowmemorykiller:s0
+genfscon sysfs /module/wlan/parameters/fwpath u:object_r:sysfs_wlan_fwpath:s0
+genfscon sysfs /devices/virtual/timed_output/vibrator/enable u:object_r:sysfs_vibrator:s0
+
+genfscon debugfs /mmc0                                u:object_r:debugfs_mmc:s0
+genfscon debugfs /tracing                             u:object_r:debugfs_tracing:s0
+genfscon debugfs /tracing/instances                   u:object_r:debugfs_tracing_instances:s0
+genfscon tracefs /instances                           u:object_r:debugfs_tracing_instances:s0
+genfscon debugfs /tracing/instances/wifi              u:object_r:debugfs_wifi_tracing:s0
+genfscon tracefs /instances/wifi                      u:object_r:debugfs_wifi_tracing:s0
+genfscon debugfs /tracing/trace_marker                u:object_r:debugfs_trace_marker:s0
+genfscon tracefs /trace_marker                        u:object_r:debugfs_trace_marker:s0
+
+genfscon debugfs /tracing/events/sync/enable                         u:object_r:debugfs_tracing_debug:s0
+genfscon debugfs /tracing/events/workqueue/enable                    u:object_r:debugfs_tracing_debug:s0
+genfscon debugfs /tracing/events/regulator/enable                    u:object_r:debugfs_tracing_debug:s0
+genfscon debugfs /tracing/events/pagecache/enable                    u:object_r:debugfs_tracing_debug:s0
+genfscon debugfs /tracing/events/irq/enable                          u:object_r:debugfs_tracing_debug:s0
+genfscon debugfs /tracing/events/ipi/enable                          u:object_r:debugfs_tracing_debug:s0
+genfscon debugfs /tracing/events/f2fs/f2fs_sync_file_enter/enable    u:object_r:debugfs_tracing_debug:s0
+genfscon debugfs /tracing/events/f2fs/f2fs_sync_file_exit/enable     u:object_r:debugfs_tracing_debug:s0
+genfscon debugfs /tracing/events/f2fs/f2fs_write_begin/enable        u:object_r:debugfs_tracing_debug:s0
+genfscon debugfs /tracing/events/f2fs/f2fs_write_end/enable          u:object_r:debugfs_tracing_debug:s0
+genfscon debugfs /tracing/events/ext4/ext4_da_write_begin/enable     u:object_r:debugfs_tracing_debug:s0
+genfscon debugfs /tracing/events/ext4/ext4_da_write_end/enable       u:object_r:debugfs_tracing_debug:s0
+genfscon debugfs /tracing/events/ext4/ext4_sync_file_enter/enable    u:object_r:debugfs_tracing_debug:s0
+genfscon debugfs /tracing/events/ext4/ext4_sync_file_exit/enable     u:object_r:debugfs_tracing_debug:s0
+genfscon debugfs /tracing/events/block/block_rq_issue/enable         u:object_r:debugfs_tracing_debug:s0
+genfscon debugfs /tracing/events/block/block_rq_complete/enable      u:object_r:debugfs_tracing_debug:s0
+genfscon debugfs /tracing/saved_cmdlines_size                        u:object_r:debugfs_tracing_debug:s0
+
+genfscon tracefs /events/sync/enable                         u:object_r:debugfs_tracing_debug:s0
+genfscon tracefs /events/workqueue/enable                    u:object_r:debugfs_tracing_debug:s0
+genfscon tracefs /events/regulator/enable                    u:object_r:debugfs_tracing_debug:s0
+genfscon tracefs /events/pagecache/enable                    u:object_r:debugfs_tracing_debug:s0
+genfscon tracefs /events/irq/enable                          u:object_r:debugfs_tracing_debug:s0
+genfscon tracefs /events/ipi/enable                          u:object_r:debugfs_tracing_debug:s0
+genfscon tracefs /events/f2fs/f2fs_sync_file_enter/enable    u:object_r:debugfs_tracing_debug:s0
+genfscon tracefs /events/f2fs/f2fs_sync_file_exit/enable     u:object_r:debugfs_tracing_debug:s0
+genfscon tracefs /events/f2fs/f2fs_write_begin/enable        u:object_r:debugfs_tracing_debug:s0
+genfscon tracefs /events/f2fs/f2fs_write_end/enable          u:object_r:debugfs_tracing_debug:s0
+genfscon tracefs /events/ext4/ext4_da_write_begin/enable     u:object_r:debugfs_tracing_debug:s0
+genfscon tracefs /events/ext4/ext4_da_write_end/enable       u:object_r:debugfs_tracing_debug:s0
+genfscon tracefs /events/ext4/ext4_sync_file_enter/enable    u:object_r:debugfs_tracing_debug:s0
+genfscon tracefs /events/ext4/ext4_sync_file_exit/enable     u:object_r:debugfs_tracing_debug:s0
+genfscon tracefs /events/block/block_rq_issue/enable         u:object_r:debugfs_tracing_debug:s0
+genfscon tracefs /events/block/block_rq_complete/enable      u:object_r:debugfs_tracing_debug:s0
+genfscon tracefs /saved_cmdlines_size                        u:object_r:debugfs_tracing_debug:s0
+
 genfscon inotifyfs / u:object_r:inotify:s0
 genfscon vfat / u:object_r:vfat:s0
 genfscon debugfs / u:object_r:debugfs:s0

private/shell.te

@@ -5,8 +5,8 @@ allow shell uhid_device:chr_file rw_file_perms;
 
 # systrace support - allow atrace to run
 allow shell debugfs_tracing:dir r_dir_perms;
-allow shell debugfs_tracing:file r_file_perms;
-allow shell tracing_shell_writable:file rw_file_perms;
+allow shell debugfs_tracing:file rw_file_perms;
+
 allow shell debugfs_trace_marker:file getattr;
 allow shell atrace_exec:file rx_file_perms;
 

private/system_server.te

@@ -656,6 +656,7 @@ allow system_server sysfs_leds:dir r_dir_perms;
 
 # Allow WifiService to start, stop, and read wifi-specific trace events.
 allow system_server debugfs_tracing_instances:dir search;
+allow system_server debugfs_wifi_tracing:dir search;
 allow system_server debugfs_wifi_tracing:file rw_file_perms;
 
 # allow system_server to exec shell on ASAN builds. Needed to run

public/file.te

@@ -67,9 +67,9 @@ type debugfs, fs_type;
 type debugfs_mmc, fs_type, debugfs_type;
 type debugfs_trace_marker, fs_type, debugfs_type, mlstrustedobject;
 type debugfs_tracing, fs_type, debugfs_type;
+type debugfs_tracing_debug, fs_type, debugfs_type;
 type debugfs_tracing_instances, fs_type, debugfs_type;
 type debugfs_wifi_tracing, fs_type, debugfs_type;
-type tracing_shell_writable, fs_type, debugfs_type;
 type pstorefs, fs_type;
 type functionfs, fs_type, mlstrustedobject;
 type oemfs, fs_type, contextmount_type;

public/init.te

@@ -188,7 +188,7 @@ allow init dev_type:dir create_dir_perms;
 allow init dev_type:lnk_file create;
 
 # Disable tracing by writing to /sys/kernel/debug/tracing/tracing_on
-allow init tracing_shell_writable:file w_file_perms;
+allow init debugfs_tracing:file w_file_perms;
 
 # Setup and control wifi event tracing (see wifi-events.rc)
 allow init debugfs_tracing_instances:dir create_dir_perms;