This CL fixes the design problem of the previous mechanism for providing
the bootstrap bionic and the runtime bionic to the same path.
Previously, bootstrap bionic was self-bind-mounted; i.e.
/system/bin/libc.so is bind-mounted to itself. And the runtime bionic
was bind-mounted on top of the bootstrap bionic. This has not only caused
problems like `adb sync` not working(b/122737045), but also is quite
difficult to understand due to the double-and-self mounting.
This is the new design:
Most importantly, these four are all distinct:
1) bootstrap bionic (/system/lib/bootstrap/libc.so)
2) runtime bionic (/apex/com.android.runtime/lib/bionic/libc.so)
3) mount point for 1) and 2) (/bionic/lib/libc.so)
4) symlink for 3) (/system/lib/libc.so -> /bionic/lib/libc.so)
Inside the mount namespace of the pre-apexd processes, 1) is
bind-mounted to 3). Likewise, inside the mount namespace of the
post-apexd processes, 2) is bind-mounted to 3). In other words, there is
no self-mount, and no double-mount.
Another change is that mount points are under /bionic and the legacy
paths become symlinks to the mount points. This is to make sure that
there is no bind mounts under /system, which is breaking some apps.
Finally, code for creating mount namespaces, mounting bionic, etc are
refactored to mount_namespace.cpp
Bug: 120266448
Bug: 123275379
Test: m, device boots, adb sync/push/pull works,
especially with following paths:
/bionic/lib64/libc.so
/bionic/bin/linker64
/system/lib64/bootstrap/libc.so
/system/bin/bootstrap/linker64
Change-Id: Icdfbdcc1efca540ac854d4df79e07ee61fca559f
This will be used for system internals to access
secondary volumes without having to bypass sdcardfs.
This reverts commit 54b8844b13
Bug: 121277410
Test: manual
Change-Id: Id5b995dc5899b5999f1dea662ba1c3ee475a0e46
This reverts commit 2599088ff6.
Reason: Breaks some 3p apps.
Bug: 122920047
Test: run the app, login.
Change-Id: Idea332b1f91e9d2ac6ebd3879da7820c8ba2284f
System server needs to be able to write to idle and
writeback nodes in the zram sysfs directory.
Bug: 117682284
Bug: 122674343
Test: Test writeback on go ref device
Change-Id: I1cd663b73a7ebb255fe7e459601e720961bbd69e
*/build.prop files are now loaded much earlier than before; from 'on
post-fs' to the time when the property service is started which is
before init starts the action loop.
This ensures that all processes that are launched by init have a
consistent view of system properties. Previously, the processes that
started before 'on post-fs' were initially with the small number of
sysprops loaded from */default.prop and then suddenly get additional
sysprops from */build.prop while they are executing.
Bug: 122714998
Test: device boots
Change-Id: Ic07528421dfbe8d4f43673cea41175d33cfbf298
This will be used for system internals to access
secondary volumes without having to bypass sdcardfs.
Bug: 121277410
Test: manual
Change-Id: I6546fa8df419157b3c2adcf5ff3faa4db4458cff
This change makes the bionic libs and the dynamic linker from the
runtime APEX (com.android.runtime) available to all processes started
after apexd finishes activating APEXes.
Specifically, the device has two sets of bionic libs and the dynamic
linker: one in the system partition for pre-apexd processes and another
in the runtime APEX for post-apexd processes. The former is referred as
the 'bootstrap' bionic and are located at
/system/lib/{libc|libdl|libm}.so and /system/bin/linker. The latter is
referred as the 'runtime' bionic and are located at
/apex/com.android.runtime/lib/bionic/{libc|libdl|libm}.so and
/apex/com.android.runtime/bin/linker.
Although the two sets are located in different directories, at runtime,
they are accessed via the same path: /system/lib/* and
/system/bin/linker ... for both pre/post-apexd processes. This is done
by bind-mounting the bootstrap or the runtime bionic to the same path.
Keeping the same path is necessary because there are many modules and
apps that explicitly or implicitly depend on the fact that bionic libs
are located in /system/lib and are loaded into the default linker
namespace (which has /system/lib in its search paths).
Before the apexd is started, init executes a built-in action
'prepare_bootstrap_bionic' that bind-mounts the bootstrap bionic to the
mount points. Processes started during this time are provided with the
bootstrap bionic. Then after the apexd is finished, init executes
another built-in action 'setup_runtime_bionic' which again mounts the
runtime bionic to the same mount points, thus hiding the previous mounts
that target the bootstrap bionic. The mounting of the runtime bionic
(which is only for post-apexd processes) is hidden from pre-apexd
processes by changing propagation type of the mount points to 'private'
and execute the pre-apexd processes with a new mount namespace using
unshare(2). If a pre-apexd process crashes and re-launched after the
apexd is on, the process still gets the bootstrap bionic by unmounting
the runtime bionic which effectively un-hides the previous bind-mounts
targeting the bootstrap bionic.
Bug: 120266448
Test: device boots
Test: cat /proc/`pidof zygote`/mountinfo shows that
/system/lib/{libc|libdl|libm}.so and /system/bin/linker are from the
runtime APEX
Test: cat /proc/'pidof vold`/mountinfo shows that the same mount points
are from system partition.
Change-Id: I7ca67755dc0656c0f0c834ba94bf23ba9b1aca68
For consistency with APKs, signature verification is performed
in the system_server. This includes checking that the signature of
an updated install matches the signature of the active package that
it updates. For this, it requires search access to /data/apex and
read access to the files under that directory.
Test: m
Change-Id: I8795b26b9a40ba7126c2a548fbec82ff322a1453
Staging Manager is a high-level service (yet to be committed) that
manages multi-package sessions requiring a reboot to be applied, for
example if one of the packages is an APEX file. This directory will
contain the session data and the temporary copies of the packages.
Bug: 118865310
Test: N/A
Change-Id: I8aceefab849cf5af17086cb6868b801d1c2615e9
The main "base" copy of time zone data is now found in
the runtime module. The system files will likely be deleted.
Test: CTS: run cts -m CtsHostTzDataTests
Test: PTS (cp'd to internal master): run pts -m PtsTimeZoneTestCases
Bug: 116191025
Bug: 119293618
Bug: 113373927
Test: build / boot with logcat inspection
Change-Id: I8dc8ff0d17aac124262d9c7c54abce61d97397e5
This change adds a command to init.rc to write cpu variant information to a file under dev/
Test: sync to device and make sure corresponding files are created.
Change-Id: Ibf90967f13f72af925c82ff79bd973ef4cdc4068
Init now parses *.rc files from the APEXs when the apexd notifies the
mount event via apexd.status sysprop.
Bug: 117403679
Test: m apex.test; adb root; adb push <builtfile> /data/apex; adb reboot
adb root; adb shell setprop ctl.start apex.test; dmesg shows that init
tries to start the service which doesn't exist.
[ 47.979657] init: Could not ctl.start for 'apex.test': Cannot find '/apex/com.android.example.apex/bin/test': No such file or directory
Change-Id: I3f12355346eeb212eca4de85b6b73257283fa054
This directory is used for preloads that are typically placed in
the system_other image and copied to /data on first boot if the
cppreopts script is installed.
Bug: 80508492
Test: make
Change-Id: I4121b07ee2fc96d533075d1907557de7e4be4ee0
Now that we mount partitions early, services can be started before the
'fs' trigger. We therefore start the service managers as early as
possible to ensure their transports are online, without device
specific rc files needing to handle that. We also start logd even
one step earlier to ensure that we capture all possible logd.
Bug: 89689596
Test: logging works for early services, include the servicemanagers
Change-Id: I75dbfcd26eb6fa77f002de10afd00f085c93aa07
This causes adds a call the fucntion to decrement the
checkpoint's retry count as soon as service manager is
available.
Test: vdc setCheckpoint 2 then reboot 3 times checking state
Bug: 112901762
Change-Id: Ie0a78b1eb05b340718e76175509d1ebefae68017
APEX filesystem images will now be mounted in /apex.
Also, make sure /data/apex is created with the right ACL.
Bug: 112455435
Test: flash and wipe, /apex is mounted as tmpfs, /data/apex is created
Change-Id: Ie27775e9f40a27b510272f212762624a04e94f1d
Currently zygote is started before loading persistent properties which
stops ART honor experiment flags planned landed as persistent
properties.
The original motivation is we would like zygote be started as early as
possible and loading persistent properties taking time, but after fix of
b/64392887 loading persist properties is now only taking 3ms on P18, 6ms
on P16 respectively.
Bug: 114044733
Test: Boot
Change-Id: Ibc118966e975c741ee8ea47091b14d691692bf2c
Because the original modification (restart SF which is added
for display bootanimation) from O to P causes bootanimation NPE,
we remove the part of restart SF and add other flow to show
bootanimation.
Test: manual, ran the test 10 times and it cause no NPE and
display BootAnimation after decrypt
Test: boot aosp_sailfish
Bug: 79547653
Change-Id: I355ccdbb2e2f27d897e2e0ee00f9300ef38ede03
In the future, systems with dm-linear will require a ramdisk to set up
the mount for system. In this world, first stage init will be a part
of this ramdisk and handle setting up dm-linear, mounting the
necessary partitions, then pivoting to the system image, which will
become the root partition.
This also enables previous devices without system-as-root, to be
unified with system-as-root devices for all aspects of boot after the
pivot_root.
Bug: 79758715
Test: boot hikey
Test: boot sailfish, boot sailfish into recovery
Change-Id: Iefa88a3ec5994e7989aa9f26f2de0351ffa5468b
This change adds a `chmod 0555 /acct` just after mounting the cgroup fs
on it. This makes it such that even on systems where the rootdir+system
partitions are shared, the permissions allow for the system user to open
files within /acct, which in turn makes libprocessgroup not complain
that it can never do anything with those files.
Bug: 111996377
Test: adb shell 'ls -ldZ /acct' # Before and after, on an aosp_sailfish
dr-xr-xr-x 48 root root u:object_r:cgroup:s0 0 1971-12-29 17:41 /acct
Change-Id: Iee6531126c6e81aa7794e44500555bd3c1cdf7b8
/ should not have any character/block devices, so might as well pass in
the nodev flag.
Bug: 73255020
Test: aosp_sailfish still boots
Test: sailfish:/ # find / -xdev -a \( -type b -o -type c -o -type p -o -type s \)
sailfish:/ #
Test: rootfs on / type rootfs (rw,seclabel)
/dev/root on / type ext4 (ro,seclabel,nodevrelatime)
Change-Id: Ia73e04b53a47506892d9d3cb61b471b81bb72dc3
When security.perf_harden is disabled through adb, use some debug
system properties to set profiling limits in the kernel, including
cpu percentage, memory, and max sample rate.
Bug: 110706031
Test: boot hikey960 and manually set system properties to make
Test: sure it works.
Change-Id: I44c0adf3a000bb393905233f2a097c97b5fe91ec
downloaded apns-conf.xml will be stored in the folder
/data/misc/apns/ to make sure TelephonyProvider gets
access.
Bug: 79948106
Test: Manual
Change-Id: I4ba0596fa6523c0eb96328dbe46ead02587bd9b8
