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Subject: [bug#51771] [PATCH 1/2] gnu: linux: Support numbers and strings in options.
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Hi,

this patch should add support for waydroid which requires certain options i=
n the kernel enabled.

In order to enable the features the lambda-match has to be extended to supp=
ort numbers and strings.

However, the kernel compiles and I can reconfigure the system, + reboot. Bu=
t I do not see /dev/binder device. Details are in the last mail.

Petr

* gnu/packages/linux.scm: Match numbers and strings in options.

diff --git a/gnu/packages/linux.scm b/gnu/packages/linux.scm
index f386139638..ffbaed0c57 100644
--- a/gnu/packages/linux.scm
+++ b/gnu/packages/linux.scm
@@ -729,7 +729,11 @@ (define (config->string options)
                       ((option . #t)
                        (string-append option "=3Dy"))
                       ((option . #f)
-                       (string-append option "=3Dn")))
+                       (string-append option "=3Dn"))
+                      ((option . number)
+                       (string-append option "=3D" number))
+                      ((option . string)
+                       (string-append option "=3D\"" string "\"")))
                     options)
                "\n"))

--
2.33.0

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To: phodina <phodina@HIDDEN>
Subject: bug#51771: Acknowledgement ([PATCH 1/2] gnu: linux: Support
 numbers and strings in options.)
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Date: Thu, 11 Nov 2021 19:03:02 +0000

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--=20
51771: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D51771
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Message sent to guix-patches@HIDDEN:

Subject: [bug#51771] [PATCH 2/2] gnu: Add linux-libre-with-waydroid.
References: <iOvT9g1d7_K-thdi2Zsdn4SxPyMuPrPFP6k121oLlG67EGRxi5tPyWOE8vb3jvCfsgZPQ13b7dKWRdVdAY6VCXV0goFY5AYOPBRV4nsvdRA=@protonmail.com>
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* gnu/packages/linux.scm (linux-libre-with-waydroid,
* waydroid-extra-linux-options): New variables.

diff --git a/gnu/packages/linux.scm b/gnu/packages/linux.scm
index ffbaed0c57..2ec9c88ecb 100644
--- a/gnu/packages/linux.scm
+++ b/gnu/packages/linux.scm
@@ -722,6 +722,14 @@ (define %bpf-extra-linux-options
     ;; kheaders module
     ("CONFIG_IKHEADERS" . #t)))

+(define %waydroid-extra-linux-options
+  `(;; Modules required for waydroid:
+   ("CONFIG_ASHMEM" . m)
+   ("CONFIG_ANDROID" . #t)
+   ("CONFIG_ANDROID_BINDER_IPC" . m)
+   ("CONFIG_ANDROID_BINDERFS" . #f)
+   ("CONFIG_ANDROID_BINDER_DEVICES" . "binder,hwbinder,vndbinder")))
+
 (define (config->string options)
   (string-join (map (match-lambda
                       ((option . 'm)
@@ -1147,6 +1155,24 @@ (define-public linux-libre-mips64el-fuloong2e
                       `(("CONFIG_OVERLAY_FS" . m))
                       %default-extra-linux-options)))

+(define-public linux-libre-with-waydroid
+  (let ((base-linux-libre
+         (make-linux-libre*
+          linux-libre-5.14-version
+          linux-libre-5.14-gnu-revision
+          linux-libre-5.14-source
+          '("x86_64-linux" "i686-linux" "armhf-linux"
+            "aarch64-linux" "riscv64-linux")
+          #:extra-version "linux"
+          #:configuration-file kernel-config
+          #:extra-options
+          (append %waydroid-extra-linux-options
+                  %default-extra-linux-options))))
+    (package
+      (inherit base-linux-libre)
+         (name "linux-libre-waydroid")
+      (inputs `(("cpio" ,cpio) ,@(package-inputs base-linux-libre))))))
+
 (define-public linux-libre-with-bpf
   (let ((base-linux-libre
          (make-linux-libre*
--
2.33.0

Message sent to guix-patches@HIDDEN:

Subject: [bug#51771] Binder kernel module missing
References: <iOvT9g1d7_K-thdi2Zsdn4SxPyMuPrPFP6k121oLlG67EGRxi5tPyWOE8vb3jvCfsgZPQ13b7dKWRdVdAY6VCXV0goFY5AYOPBRV4nsvdRA=@protonmail.com>
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Date: Thu, 11 Nov 2021 19:31:07 +0000
From: phodina <phodina@HIDDEN>
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Unfortunately, as stated above the binder interface is missing. I looked fo=
r the kernel module but couldn't find it. As the /proc/config.gz is not pre=
sent I can't verify it's enabled.

$ find /run/booted-system/kernel/lib/modules/5.14.17-gnu/kernel/ -iname "*b=
inder*"
$ cat /proc/cmdline
BOOT_IMAGE=3D/gnu/store/fr1cwmbn19hyrs3wxr5sqr7iy4cj674y-linux-libre-waydro=
id-5.14.17/bzImage --root=3D/dev/mapper/cryptsystem --system=3D/gnu/store/8=
g26gi6v9dni0cagc3l1ny8shyz8r38h-system --load=3D/gnu/store/8g26gi6v9dni0cag=
c3l1ny8shyz8r38h-system/boot modprobe.blacklist=3Dusbmouse,usbkbd quiet

Therefore the waydroid userspace manager also doesn't work:

# waydroid.py init
[19:40:05] Failed to load binder driver
[19:40:06] modprobe: FATAL: Module binder_linux not found in directory /run=
/booted-system/kernel/lib/modules/5.14.17-gnu
[19:40:06] ERROR: Binder node "binder" for waydroid not found
[19:40:06] See also: <https://github.com/waydroid>
Run 'waydroid log' for details.

$ waydroid.py log
(006323) [19:40:05] % modprobe binder_linux devices=3D"anbox-binder,anbox-v=
ndbinder,anbox-hwbinder"
modprobe: FATAL: Module binder_linux not found in directory /run/booted-sys=
tem/kernel/lib/modules/5.14.17-gnu
(006323) [19:40:05] Failed to load binder driver
(006323) [19:40:06] modprobe: FATAL: Module binder_linux not found in direc=
tory /run/booted-system/kernel/lib/modules/5.14.17-gnu
(006323) [19:40:06] ERROR: Binder node "binder" for waydroid not found
(006323) [19:40:06] See also: <https://github.com/waydroid>
(006323) [19:40:06] Traceback (most recent call last):
  File "/gnu/store/iprc2yqsx5zi8nc2g3nqvlmlqzbw7nrf-waydroid-1.2.0/lib/wayd=
roid/tools/__init__.py", line 54, in main

My conclusion is the module is not enabled and built. It could be do the th=
e extended match-lambda expression as I'm not Guile guru.

The patch related to waydroid can be find here [1].

[1]=C2=A0https://issues.guix.gnu.org/51737

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[PATCH v2 1/2] gnu: linux: Support numbers and strings in options.

* gnu/packages/linux.scm: Match numbers and strings in options.

diff --git a/gnu/packages/linux.scm b/gnu/packages/linux.scm
index f386139638..cfc09580a3 100644
--- a/gnu/packages/linux.scm
+++ b/gnu/packages/linux.scm
@@ -724,12 +724,16 @@ (define %bpf-extra-linux-options

 (define (config->string options)
   (string-join (map (match-lambda
-                      ((option . 'm)
-                       (string-append option "=3Dm"))
-                      ((option . #t)
-                       (string-append option "=3Dy"))
                       ((option . #f)
-                       (string-append option "=3Dn")))
+                       (format #f "# ~a is not set" option))
+                      ((option . #t)
+                       (format #f "~a=3Dy" option))
+                      ((option . 'm)
+                       (format #f "~a=3Dm" option))
+                      ((option . (? number? value))
+                       (format #f "~a=3D~a" option value))
+                      ((option . (? string? value))
+                       (format #f "~a=3D\"~a\"" option value)))
                     options)
                "\n"))

--
2.33.0

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* gnu/packages/linux.scm (linux-libre-with-waydroid,
* waydroid-extra-linux-options): New variables.

diff --git a/gnu/packages/linux.scm b/gnu/packages/linux.scm
index cfc09580a3..a5d95bf5d4 100644
--- a/gnu/packages/linux.scm
+++ b/gnu/packages/linux.scm
@@ -722,6 +722,14 @@ (define %bpf-extra-linux-options
     ;; kheaders module
     ("CONFIG_IKHEADERS" . #t)))

+(define %waydroid-extra-linux-options
+  `(;; Modules required for waydroid:
+   ("CONFIG_ASHMEM" . #t)
+   ("CONFIG_ANDROID" . #t)
+   ("CONFIG_ANDROID_BINDER_IPC" . #t)
+   ("CONFIG_ANDROID_BINDERFS" . #t)
+   ("CONFIG_ANDROID_BINDER_DEVICES" . "binder,hwbinder,vndbinder")))
+
 (define (config->string options)
   (string-join (map (match-lambda
                       ((option . #f)
@@ -1147,6 +1155,24 @@ (define-public linux-libre-mips64el-fuloong2e
                       `(("CONFIG_OVERLAY_FS" . m))
                       %default-extra-linux-options)))

+(define-public linux-libre-waydroid
+  (let ((base-linux-libre
+         (make-linux-libre*
+          linux-libre-5.14-version
+          linux-libre-5.14-gnu-revision
+          linux-libre-5.14-source
+          '("x86_64-linux" "i686-linux" "armhf-linux"
+            "aarch64-linux" "riscv64-linux")
+          #:extra-version "linux"
+          #:configuration-file kernel-config
+          #:extra-options
+          (append %waydroid-extra-linux-options
+                  %default-extra-linux-options))))
+    (package
+      (inherit base-linux-libre)
+         (name "linux-libre-waydroid")
+      (inputs `(("cpio" ,cpio) ,@(package-inputs base-linux-libre))))))
+
 (define-public linux-libre-with-bpf
   (let ((base-linux-libre
          (make-linux-libre*
--
2.33.0

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Hi,

here are the updated patches that:

- enable to set numbers and strings as options in kernel config
- define a new linux kernel which has support for waydroid

$ grep -E "ANDROID|ASHMEM" /run/current-system/kernel/.config
CONFIG_ASHMEM=3Dy
CONFIG_ANDROID=3Dy
CONFIG_ANDROID_BINDER_IPC=3Dy
CONFIG_ANDROID_BINDERFS=3Dy
CONFIG_ANDROID_BINDER_DEVICES=3D"binder,hwbinder,vndbinder"
# CONFIG_ANDROID_BINDER_IPC_SELFTEST is not set

Huge thanks to Tobias Geerinckx-Rice for help with the parsing issue!

Petr

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Hi,

would it be possible to just review the first patch which adds support for =
strings in kernel options?

Unfortunately, there is no way to build just the kernel modules with suppor=
t for ASHMEM as the coded misused the `kallsyms_lookup_name` [1].

Therefore the only way to have working waydroid is to build a kernel with t=
he options enabled.

I'll leave the second patch for the other open issue [2].

[1] https://github.com/anbox/anbox-modules/issues/49#issuecomment-737091629
[2] https://issues.guix.gnu.org/51737

----
Petr

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Hi,

could you please share your thoughts on the parsing of the config and possi=
bly also on waydroid?

Petr

Last modified: Thu, 14 Apr 2022 08:15:02 UTC

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