dumpstate: gsa: Add GSA logs to dumpstate

New Stuff:
* Add program to read the GSA logs

Evidence:
avc:  denied  { read } for  comm="dump_gsa" name="gsa-log1" dev="tmpfs" ino=1261 scontext=u:r:dump_gsa:s0 tcontext=u:object_r:gsa_log_device:s0 tclass=chr_file permissive=0
avc:  denied  { read } for  comm="dump_gsa" name="gsa-bl1-log2" dev="tmpfs" ino=1222 scontext=u:r:dump_gsa:s0 tcontext=u:object_r:gsa_log_device:s0 tclass=chr_file permissive=0

Bug: 360205716
Test: adb shell dumpstate and check the dumpstate_board.txt for GSA logs
Flag: EXEMPT debug only
Change-Id: I4ea35da7916273cf526570067f24145ef4fb14f1
Signed-off-by: Thomas Flucke <tflucke@google.com>

gsa/Android.bp

@@ -0,0 +1,20 @@
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+cc_binary {
+    name: "dump_gsa",
+    srcs: ["dump_gsa.cpp"],
+    init_rc: ["init.gsa.rc"],
+    cflags: [
+        "-Wall",
+        "-Wextra",
+        "-Werror",
+        "-pedantic",
+    ],
+    shared_libs: [
+        "libdump",
+    ],
+    vendor: true,
+    relative_install_path: "dump",
+}

gsa/dump_gsa.cpp

@@ -0,0 +1,31 @@
+/*
+ * Copyright 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include <dump/pixel_dump.h>
+#include <unistd.h>
+
+#define DIM(arr) (sizeof(arr) / sizeof(arr[0]))
+
+const char* paths[][2] = {{"GSA MAIN LOG", "/dev/gsa-log1"},
+                          {"GSA INTERMEDIATE LOG", "/dev/gsa-bl1-log2"}};
+
+int main() {
+  for (size_t i = 0; i < DIM(paths); i++) {
+    if (!access(paths[i][1], R_OK)) {
+      dumpFileContent(paths[i][0], paths[i][1]);
+    }
+  }
+  return 0;
+}

gsa/gsa.mk

@@ -0,0 +1,3 @@
+BOARD_VENDOR_SEPOLICY_DIRS += device/google/gs-common/gsa/sepolicy/gsa
+
+PRODUCT_PACKAGES += dump_gsa

gsa/init.gsa.rc

@@ -0,0 +1,6 @@
+on init
+    # Change GSA log group for dumpstate
+    chmod 660         /dev/gsa-log1
+    chmod 660         /dev/gsa-bl1-log2
+    chown root system /dev/gsa-log1
+    chown root system /dev/gsa-bl1-log2

gsa/sepolicy/gsa/dump_gsa.te

@@ -0,0 +1,6 @@
+# GSA
+pixel_bugreport(dump_gsa)
+
+userdebug_or_eng(`
+  allow dump_gsa gsa_log_device:chr_file r_file_perms;
+')

gsa/sepolicy/gsa/file.te

@@ -0,0 +1,2 @@
+# GSA
+type gsa_log_device, dev_type;

gsa/sepolicy/gsa/file_contexts

@@ -0,0 +1,4 @@
+# GSA
+/dev/gsa-log1                                                               u:object_r:gsa_log_device:s0
+/dev/gsa-bl1-log2                                                           u:object_r:gsa_log_device:s0
+/vendor/bin/dump/dump_gsa                                                   u:object_r:dump_gsa_exec:s0