Especially now that property_service is a thread, there may be some
delay between when init sets sys.powerctl and when the main thread of
init receives this and triggers shutdown. It's possible that
outstanding init commands are run during this gap and that is not
desirable.
Instead, have builtins call TriggerShutdown() directly, so we can be
sure that the next action that init runs will be to shutdown the
device.
Test: reboot works
Test: reboot into recovery due to bad /data works
Change-Id: I26fb9f4f57f46c7451b8b58187138cfedd6fd9eb
This replaces the recently added `exec_reboot_on_failure` builtin, since
it'll be cleaner to extend service definitions than extending `exec`.
This is in line with what we decided when adding `exec_start` instead
of extending `exec` to add parameters for priority.
Test: `exec_start` a service with a reboot_on_failure option and watch
the system reboot appropriately when the service is not found and when
the service terminates with a non-zero exit code.
Change-Id: I332bf9839fa94840d159a810c4a6ba2522189d0b
It's been a long standing issue that init cannot respond to property
set messages when it is running a builtin command. This is
particularly problematic when the commands involve IPC to vold or
other daemons, as it prevents them from being able to set properties.
This change has init run property service in a thread, which
eliminates the above issue.
This change may also serve as a starting block to running property
service in an entirely different process to better isolate init from
handling property requests.
Reland: during reboot, init stops processing property_changed messages
from property service, since it will not act on these anyway. This
had an unexpected effect of causing future property_set calls to block
indefinitely, since the buffer between init and property_service was
filling up and the send() call from property_service would then
block. This change has init tell property_service to stop sending it
property_changed messages once reboot begins.
Test: CF boots, walleye boots, properties are set appropriately
Change-Id: I26902708e8be788caa6dbcf4b6d2968d90962785
Add exec_reboot_on_failure builtin and refactor the VDC commands that
had similar functionality. These will now also reboot in the case
that the program cannot be found or run for any reason.
Test: boots normally, reboots if command is not found or if command
returns status '1'
Change-Id: I1c99498c2b741512a50188e1a325c25e9ec8fba0
It's been a long standing issue that init cannot respond to property
set messages when it is running a builtin command. This is
particularly problematic when the commands involve IPC to vold or
other daemons, as it prevents them from being able to set properties.
This change has init run property service in a thread, which
eliminates the above issue.
This change may also serve as a starting block to running property
service in an entirely different process to better isolate init from
handling property requests.
Test: CF boots, walleye boots, properties are set appropriately
Change-Id: I13b8bf240c9fcb1d2d5890a8be2f0ef74efd4adf
Use lstat(), and then make only the system calls needed to fix the
directory up.
Bug: 140027478
Test: boots twice, no worrying log messages.
Change-Id: I1c1445baae3ec1c1ce17626ede388aa04d5f7781
It's been a long standing issue that init cannot respond to property
set messages when it is running a builtin command. This is
particularly problematic when the commands involve IPC to vold or
other daemons, as it prevents them from being able to set properties.
This change has init run property service in a thread, which
eliminates the above issue.
This change may also serve as a starting block to running property
service in an entirely different process to better isolate init from
handling property requests.
Test: CF boots, walleye boots, properties are set appropriately
Change-Id: Id9534a5916abb2f7d2a49cda54e33c1b69c50c2f
Host init verifier already checks that the names and number of
arguments for builtins are correct, but it can check more. This
change ensures that property expansions are well formed, and that
arguments that can be parsed on the host are correct. For example it
checks that UIDs and GIDs exist, that numerical values can be parsed,
and that rlimit strings are correct.
Test: build
Change-Id: Ied8882498a88a9f8324db6b8d1020aeeccc8177b
Previously we were ignoring ENOENT from all builtins as
rootdir/init.rc has many legacy commands that we need to keep for
backwards compatibility, but are otherwise no longer relevant.
However, this wasn't catching actual issues, for example chown failing
due to not finding the user or group name. This change therefore
reduces the scope of ignoring ENOENT to the only the extraneous errors
in builtins.
Test: boot CF and walleye without seeing errors from init.rc
Test: see errors from invalid users/groups in chown
Change-Id: Ia8e14fa2591e083cb1736c313a3e55515bc5d15e
I've heard that keyword_map is too complex, in particular the tuple
and the pair in BuiltinFunctionMap, so this change removes a lot of
that complexity and, more importantly, better documents how all of
this works.
Test: boot, init unit tests
Change-Id: I74e5f9de7f2ec524cb6127bb9da2956b5f307f56
For devices that use FDE and don't support updatable APEXes, don't
stop and restart all processes - there is no need and it only increases
boot time for these devices.
Additionally, some daemons have never been restarted in the past, and
restarting them exposes certain issues.
Bug: 137251597
Bug: 136777273
Bug: 135627804
Test: verified manually w/ ro.updatable.apex=false
Change-Id: I9590f2c2cdfab0a49f39846896460305d44221ee
android-base:
* Add NOLINT for expanding namespace std for std::string* ostream
overload
libdm:
* Fix missing parentesis around macro parameters
init:
* Fix missing CLOEXEC usage and add NOLINT for the intended
usages.
* Fix missing parentesis around macro parameters
* Fix erase() / remove_if() idiom
* Correctly specific unsigned char when intended
* 'namespace flags' should be signed, since 'flags' it signed for
clone()
* Add clear to property restore vector<string> to empty after move
* Explicit comparison against 0 for strcmp
Test: build
Change-Id: I8c31dafda2c43ebc5aa50124cbbd6e23ed2c4101
In retrospect, these always should have been header only. We don't
need setgroups() anymore either, since we have the right symbols now.
Test: build
Change-Id: If6fbf6f8ee288ed261576207d90a7ec5674853f9
By moving it into builtins.cpp..., but that's less bad than it is
now, especially since this is defunct in code targeting Q+. Remove
the guards that init.h isn't being included by other files too as it's
not useful anymore.
Test: build
Change-Id: Ic564fcff9e8716ec924098b07a8c9d94ca25f960
It's been a long standing problem that init calls fs_mgr functions
synchronously and therefore stops handling properties, which causes
deadlocks if either fs_mgr, or vdc, or vold attempt to set
properties.
Previous work, b/21904461, shows that there is a large performance
penalty for adding any amount of locking to properties, so moving
property service into its own thread generically is not a viable
option. However, we can be sure that init is not setting properties
while the fs_mgr functions are running, so we can poll the property
socket in a thread while we call these functions.
The other alternative would have been to separate the fs_mgr functions
into smaller pieces and revisit the main init loop between each
piece. Unfortunately, this would be difficult, since
fs_mgr_mount_all() calls out to different processes via logwrapper,
which synchronously polls on a logging FD from the child, among other
complexities that would make this strategy much more difficult than it
would be worth.
Bug: 21904461
Test: device boots, including when setting property in
fs_mgr_mount_all()
Change-Id: Ib0b7123024035884f9d90f9b489c1e2f5a2e1707
Now that Result<T> is actually expected<T, ...>, and the expected
proposal states expected<void, ...> as the way to indicate an expected
object that returns either successfully with no object or an error,
let's move init's Result<Success> to the preferred Result<void>.
Bug: 132145659
Test: boot, init unit tests
Change-Id: Ib2f98396d8e6e274f95a496fcdfd8341f77585ee
This change fixes a bug that *.rc files in APEXes are not read when the
APEXes are flattened. This was because init used "/apex/*@*/etc/*.rc"
glob pattern to find the files, which gives 0 result with flattened
APEXes; with flattend APEXes /system/apex is just bind-mounted to /apex,
and therefore, the name@version directories don't exist.
Fixing the issue by globing /apex/*/etc/*.rc and filter-out the paths
with @ to avoid double parsing the *.rc files in case of non-flattend
APEXes.
Bug: 134067086
Test: revert I75ec6b69cca1cef071b50fac9a4cf8b8ceddb142
build sdk_gphone_x86_64 and record a video in the camera app.
The recording works. `ps -A | grep media.swcodec` shows media.swcodec process.
`atest CtsStatsdHostTestCases:android.cts.statsd.atom.UidAtomTests#testAudioState` passes
Test: build sdk_phone_x86_64 and do the same.
Change-Id: I00af1910a8e8a330addc4c6903e5f3695aeb6865
This change factors out functions that handle selabels from
selinux.h/cpp into selabel.h/cpp. This allows util.cpp to be used by
the upcoming native zygote without a bunch of define flags that are
required for selinux.cpp.
Bug: 133443795
Test: Build and boot cuttlefish.
Change-Id: Ie238a96c6407c6698a605dd8803c1727abfaae7b
Importing rc files during mount_all was at best a stop gap until
Treble's first stage mount and at worst a bad idea. It doesn't have a
reason to exist now that first stage mount exists and is required, and
always had edge cases where init could not handle loading some aspects
of scripts after it had started processing actions.
This change removes this functionality for devices launching after Q.
Test: devices boot
Change-Id: I3181289572968637b884e150d36651f453d40362
This keyword was introduced to support restarting services on devices
using APEX and FDE. The current implementation is not a restart, but
rather a 'reset' followed by a 'start', because the real /data must be
mounted in-between those two actions. But we effectively want this to be
a restart, which means that we also want to start 'disabled' services
that were running at the time we called 'class_reset_post_data'.
To implement this, keep track of whether a service was running when its
class was reset at post-data, and start all those services.
Bug: 132592548
Test: manual testing on FDE Taimen
Change-Id: I1e81e2c8e0ab2782150073d74e50e4cd734af7b9
Merged-In: I1e81e2c8e0ab2782150073d74e50e4cd734af7b9
On devices that use FDE and APEX at the same time, we need to bring up a
minimal framework to be able to mount the /data partition. During this
period, a tmpfs /data filesystem is created, which doesn't contain any
of the updated APEXEs. As a consequence, all those processes will be
using the APEXes from the /system partition.
This is obviously not desired, as APEXes in /system may be old and/or
contain security issues. Additionally, it would create a difference
between FBE and FDE devices at runtime.
Ideally, we restart all processes that have started after we created the
tmpfs /data. We can't (re)start based on class names alone, because some
classes (eg 'hal') contain services that are required to start apexd
itself and that shouldn't be killed (eg the graphics HAL).
To address this, keep track of which processes are started after /data
is mounted, with a new 'mark_post_data' keyword. Additionally, create
'class_reset_post_data', which resets all services in the class that
were created after the initial /data mount, and 'class_start_post_data',
which starts all services in the class that were started after /data was
mounted.
On a device with FBE, these keywords wouldn't be used; on a device with
FDE, we'd use them to bring down the right processes after the user has
entered the correct secret, and restart them.
Bug: 118485723
Test: manually verified process list
Change-Id: I16adb776dacf1dd1feeaff9e60639b99899905eb
The code to read verity state in userspace is deprecated in favor of
having the bootloader read and report the state, so this change
removes this now unused code.
Bug: 73456517
Test: boot
Change-Id: Ib626fd61850bce3016179ca92a9831c2ac29c032
A fork() was historically added in case of fs_mgr crashing or leaking
memory, but this should not be the case with fs_mgr, and a fork() only
hides any such problem, instead of allowing us to address it
directly.
Test: boot
Change-Id: If7ee4807757048258a6ea9a79a24cebbacc530cc
umount_all is the cleanup step for mount_all.
In particular, the mount_all builtin creates a verity device,
'postinstall-verity', for the following line:
system /postinstall ... ... slotselect_other,logical,avb_keys=...
cppreopt umounts /postinstall but doesn't destroy the postinstall-verity
device, causing OTA to fail (because it cannot destroy the
system_[other] device). umount_all also destroy the verity device.
Note that mount_all does not map system_[other]; it is mapped by
first stage init. Hence, umount_all doesn't destroy it either. The OTA
client is reponsible for unmapping the device itself.
Bug: 129988285
Test: flash, boot, then check `dmctl list devices`, then OTA
Change-Id: Id3ab65b3860b6ea6cfec310ab13652009c81f415
Merged-In: Id3ab65b3860b6ea6cfec310ab13652009c81f415
Bind-mounting of the bionic files on /bionic/* paths no longer required
as there are direct symlinks from bionic files in /system partition to
the corresponding bionic files in the runtime APEX. e.g.,
/system/lib/libc.so -> /apex/com.android.runtime/lib/bionic/libc.so
Bug: 125549215
Test: m; devices boots
Change-Id: I4a43101c3e3e2e14a81001d6d65a8a4b727df385
Summary: Boot sequence around apexd is changed to make it possible for
pre-apexd processes to use libraries from APEXes. They no longer need to
wait for the apexd to finish activating APEXes, which again can be
done only after /data/ is mounted. This improves overall boot
performance.
Detail: This change fixes the problem that processes that are started
before apexd (so called pre-apexd processes) can't access libraries
that are provided only by the APEXes but are not found in the system
partition (e.g. libdexfile_external.so, etc.). Main idea is to activate
system APEXes (/system/apex/*.apex) before /data is mounted and then
activate the updated APEXes (/data/apex/*.apex) after the /data mount.
Detailed boot sequence is as follows.
1) init prepares the bootstrap and default mount namespaces. A tmpfs is
mounted on /apex and the propagation type of the mountpoint is set to
private.
2) before any other process is started, apexd is started in bootstrap
mode. When executed in the mode, apexd only activates APEXes under
/system/apex. Note that APEXes activated in this phase are mounted in
the bootstrap mount namespace only.
3) other pre-apexd processes are started. They are in the bootstrap
mount namespace and thus are provided with the libraries from the system
APEXes.
4) /data is mounted. init switches into the default mount namespace and
starts apexd as a daemon as usual.
5) apexd scans both /data/apex and /system/apex, and activate latest
APEXes from the directories. Note that APEXes activated in this phase
are mounted in the default namespaces only and thus are not visible to
the pre-apexd processes.
Bug: 125549215
Test: m; device boots
Change-Id: I21c60d0ebe188fa4f24d6e6861f85ca204843069
fs_mgr_update_verity_state() has two callers with generally different
intentions. One caller loops through all entries in the default fstab
to set partition.<mount_point>.verified properties. The other caller
is only interested in whether or a specific mount point has verity
enabled.
Given this, we refactor fs_mgr_update_verity_state() to
fs_mgr_get_verity_mount_point() which takes a single FstabEntry and
returns the mount point used for the dm-verity device or an empty
option if verity is not enabled on that mount point.
Test: adb-remount-test.sh test on blueline
Change-Id: Ic7dd8390509e95b2931b21e544c919a544138864
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 reverts commit 2599088ff6.
Reason: Breaks some 3p apps.
Bug: 122920047
Test: run the app, login.
Change-Id: Idea332b1f91e9d2ac6ebd3879da7820c8ba2284f
*/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 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
