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      1 # Domain for the otapreopt executable, running under postinstall_dexopt
      2 #
      3 # Note: otapreopt is a driver for dex2oat, and reuses parts of installd. As such,
      4 # this is derived and adapted from installd.te.
      5 
      6 type postinstall_dexopt, domain;
      7 
      8 allow postinstall_dexopt self:capability { chown dac_override fowner setgid setuid };
      9 
     10 allow postinstall_dexopt postinstall_file:filesystem getattr;
     11 allow postinstall_dexopt postinstall_file:dir { getattr search };
     12 allow postinstall_dexopt postinstall_file:lnk_file read;
     13 allow postinstall_dexopt proc:file { getattr open read };
     14 allow postinstall_dexopt tmpfs:file read;
     15 
     16 # Note: /data/ota is created by init (see system/core/rootdir/init.rc) to avoid giving access
     17 # here and having to relabel the directory.
     18 
     19 # Read app data (APKs) as input to dex2oat.
     20 r_dir_file(postinstall_dexopt, apk_data_file)
     21 # Read vendor app data (APKs) as input to dex2oat.
     22 r_dir_file(postinstall_dexopt, vendor_app_file)
     23 # Access to app oat directory.
     24 r_dir_file(postinstall_dexopt, dalvikcache_data_file)
     25 
     26 # Read profile data.
     27 allow postinstall_dexopt user_profile_data_file:dir { getattr search };
     28 allow postinstall_dexopt user_profile_data_file:file r_file_perms;
     29 
     30 # Write to /data/ota(/*). Create symlinks in /data/ota(/*)
     31 allow postinstall_dexopt ota_data_file:dir create_dir_perms;
     32 allow postinstall_dexopt ota_data_file:file create_file_perms;
     33 allow postinstall_dexopt ota_data_file:lnk_file create_file_perms;
     34 
     35 # Need to write .b files, which are dalvikcache_data_file, not ota_data_file.
     36 # TODO: See whether we can apply ota_data_file?
     37 allow postinstall_dexopt dalvikcache_data_file:dir rw_dir_perms;
     38 allow postinstall_dexopt dalvikcache_data_file:file create_file_perms;
     39 
     40 # Allow labeling of files under /data/app/com.example/oat/
     41 # TODO: Restrict to .b suffix?
     42 allow postinstall_dexopt dalvikcache_data_file:dir relabelto;
     43 allow postinstall_dexopt dalvikcache_data_file:file { relabelto link };
     44 
     45 # Check validity of SELinux context before use.
     46 selinux_check_context(postinstall_dexopt)
     47 selinux_check_access(postinstall_dexopt)
     48 
     49 
     50 # Postinstall wants to know about our child.
     51 allow postinstall_dexopt postinstall:process sigchld;
     52 
     53 # Allow otapreopt to use file descriptors from otapreopt_chroot.
     54 # TODO: Probably we can actually close file descriptors...
     55 allow postinstall_dexopt otapreopt_chroot:fd use;
     56 
     57 allow postinstall_dexopt cpuctl_device:dir search;
     58