tequilaOS/platform_system_core
2
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity
platform_system_core/libcutils/fs_config.cpp
Mark Salyzyn b304f6d4e7 bootstat: introduce sys.boot.reason 
Adding functionality to bootstat --record_boot_complete and
--record_boot_reason to initialize sys.boot.reason, the canonical
system boot reason.

Filter out ro.boot.bootreason oem noise into sys.boot.reason.  Add
heuristics to determine what the boot reason is, when otherwise would
be defaulting to the blunt and relatively devoid of detail catch-all
reboot reasons ("reboot", "shutdown", "cold", "warm", "hard").

boot_reason_test.sh is also a compliance test.

Test: boot_reason_test.sh all
Bug: 63736262
Change-Id: Ic9a42cccbcfc89a5c0e081ba66d577a97c8c8c76
2017-09-12 09:28:25 -07:00

388 lines
17 KiB
C++
Raw Blame History

/*
* Copyright (C) 2007 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.
*/
// This file is used to define the properties of the filesystem
// images generated by build tools (mkbootfs and mkyaffs2image) and
// by the device side of adb.
#define LOG_TAG "fs_config"
#include <errno.h>
#include <fcntl.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <log/log.h>
#include <private/android_filesystem_config.h>
#include <private/fs_config.h>
#include <utils/Compat.h>
#ifndef O_BINARY
#define O_BINARY 0
#endif
// My kingdom for <endian.h>
static inline uint16_t get2LE(const uint8_t* src) {
return src[0] | (src[1] << 8);
}
static inline uint64_t get8LE(const uint8_t* src) {
uint32_t low, high;
low = src[0] | (src[1] << 8) | (src[2] << 16) | (src[3] << 24);
high = src[4] | (src[5] << 8) | (src[6] << 16) | (src[7] << 24);
return ((uint64_t)high << 32) | (uint64_t)low;
}
#define ALIGN(x, alignment) (((x) + ((alignment)-1)) & ~((alignment)-1))
// Rules for directories.
// These rules are applied based on "first match", so they
// should start with the most specific path and work their
// way up to the root.
static const struct fs_path_config android_dirs[] = {
// clang-format off
{ 00770, AID_SYSTEM, AID_CACHE, 0, "cache" },
{ 00500, AID_ROOT, AID_ROOT, 0, "config" },
{ 00771, AID_SYSTEM, AID_SYSTEM, 0, "data/app" },
{ 00771, AID_SYSTEM, AID_SYSTEM, 0, "data/app-private" },
{ 00771, AID_SYSTEM, AID_SYSTEM, 0, "data/app-ephemeral" },
{ 00771, AID_ROOT, AID_ROOT, 0, "data/dalvik-cache" },
{ 00771, AID_SYSTEM, AID_SYSTEM, 0, "data/data" },
{ 00771, AID_SHELL, AID_SHELL, 0, "data/local/tmp" },
{ 00771, AID_SHELL, AID_SHELL, 0, "data/local" },
{ 00770, AID_DHCP, AID_DHCP, 0, "data/misc/dhcp" },
{ 00771, AID_SHARED_RELRO, AID_SHARED_RELRO, 0, "data/misc/shared_relro" },
{ 01771, AID_SYSTEM, AID_MISC, 0, "data/misc" },
{ 00775, AID_MEDIA_RW, AID_MEDIA_RW, 0, "data/media/Music" },
{ 00775, AID_MEDIA_RW, AID_MEDIA_RW, 0, "data/media" },
{ 00750, AID_ROOT, AID_SHELL, 0, "data/nativetest" },
{ 00750, AID_ROOT, AID_SHELL, 0, "data/nativetest64" },
{ 00775, AID_ROOT, AID_ROOT, 0, "data/preloads" },
{ 00771, AID_SYSTEM, AID_SYSTEM, 0, "data" },
{ 00755, AID_ROOT, AID_SYSTEM, 0, "mnt" },
{ 00755, AID_ROOT, AID_ROOT, 0, "root" },
{ 00750, AID_ROOT, AID_SHELL, 0, "sbin" },
{ 00777, AID_ROOT, AID_ROOT, 0, "sdcard" },
{ 00751, AID_ROOT, AID_SDCARD_R, 0, "storage" },
{ 00755, AID_ROOT, AID_SHELL, 0, "system/bin" },
{ 00755, AID_ROOT, AID_ROOT, 0, "system/etc/ppp" },
{ 00755, AID_ROOT, AID_SHELL, 0, "system/vendor" },
{ 00755, AID_ROOT, AID_SHELL, 0, "system/xbin" },
{ 00755, AID_ROOT, AID_SHELL, 0, "vendor" },
{ 00755, AID_ROOT, AID_ROOT, 0, 0 },
// clang-format on
};
#ifndef __ANDROID_VNDK__
auto __for_testing_only__android_dirs = android_dirs;
#endif
// Rules for files.
// These rules are applied based on "first match", so they
// should start with the most specific path and work their
// way up to the root. Prefixes ending in * denotes wildcard
// and will allow partial matches.
static const char sys_conf_dir[] = "/system/etc/fs_config_dirs";
static const char sys_conf_file[] = "/system/etc/fs_config_files";
// No restrictions are placed on the vendor and oem file-system config files,
// although the developer is advised to restrict the scope to the /vendor or
// oem/ file-system since the intent is to provide support for customized
// portions of a separate vendor.img or oem.img. Has to remain open so that
// customization can also land on /system/vendor, /system/oem or /system/odm.
// We expect build-time checking or filtering when constructing the associated
// fs_config_* files (see build/tools/fs_config/fs_config_generate.c)
static const char ven_conf_dir[] = "/vendor/etc/fs_config_dirs";
static const char ven_conf_file[] = "/vendor/etc/fs_config_files";
static const char oem_conf_dir[] = "/oem/etc/fs_config_dirs";
static const char oem_conf_file[] = "/oem/etc/fs_config_files";
static const char odm_conf_dir[] = "/odm/etc/fs_config_dirs";
static const char odm_conf_file[] = "/odm/etc/fs_config_files";
static const char* conf[][2] = {
{sys_conf_file, sys_conf_dir},
{ven_conf_file, ven_conf_dir},
{oem_conf_file, oem_conf_dir},
{odm_conf_file, odm_conf_dir},
};
static const struct fs_path_config android_files[] = {
// clang-format off
{ 00644, AID_SYSTEM, AID_SYSTEM, 0, "data/app/*" },
{ 00644, AID_SYSTEM, AID_SYSTEM, 0, "data/app-ephemeral/*" },
{ 00644, AID_SYSTEM, AID_SYSTEM, 0, "data/app-private/*" },
{ 00644, AID_APP, AID_APP, 0, "data/data/*" },
{ 00644, AID_MEDIA_RW, AID_MEDIA_RW, 0, "data/media/*" },
{ 00640, AID_ROOT, AID_SHELL, 0, "data/nativetest/tests.txt" },
{ 00640, AID_ROOT, AID_SHELL, 0, "data/nativetest64/tests.txt" },
{ 00750, AID_ROOT, AID_SHELL, 0, "data/nativetest/*" },
{ 00750, AID_ROOT, AID_SHELL, 0, "data/nativetest64/*" },
{ 00600, AID_ROOT, AID_ROOT, 0, "default.prop" },
{ 00600, AID_ROOT, AID_ROOT, 0, "odm/build.prop" },
{ 00600, AID_ROOT, AID_ROOT, 0, "odm/default.prop" },
{ 00444, AID_ROOT, AID_ROOT, 0, odm_conf_dir + 1 },
{ 00444, AID_ROOT, AID_ROOT, 0, odm_conf_file + 1 },
{ 00444, AID_ROOT, AID_ROOT, 0, oem_conf_dir + 1 },
{ 00444, AID_ROOT, AID_ROOT, 0, oem_conf_file + 1 },
{ 00750, AID_ROOT, AID_SHELL, 0, "sbin/fs_mgr" },
{ 00755, AID_ROOT, AID_SHELL, 0, "system/bin/crash_dump32" },
{ 00755, AID_ROOT, AID_SHELL, 0, "system/bin/crash_dump64" },
{ 00755, AID_ROOT, AID_SHELL, 0, "system/bin/debuggerd" },
{ 00750, AID_ROOT, AID_ROOT, 0, "system/bin/install-recovery.sh" },
{ 00700, AID_ROOT, AID_ROOT, 0, "system/bin/secilc" },
{ 00750, AID_ROOT, AID_ROOT, 0, "system/bin/uncrypt" },
{ 00600, AID_ROOT, AID_ROOT, 0, "system/build.prop" },
{ 00444, AID_ROOT, AID_ROOT, 0, sys_conf_dir + 1 },
{ 00444, AID_ROOT, AID_ROOT, 0, sys_conf_file + 1 },
{ 00440, AID_ROOT, AID_SHELL, 0, "system/etc/init.goldfish.rc" },
{ 00550, AID_ROOT, AID_SHELL, 0, "system/etc/init.goldfish.sh" },
{ 00550, AID_ROOT, AID_SHELL, 0, "system/etc/init.ril" },
{ 00555, AID_ROOT, AID_ROOT, 0, "system/etc/ppp/*" },
{ 00555, AID_ROOT, AID_ROOT, 0, "system/etc/rc.*" },
{ 00440, AID_ROOT, AID_ROOT, 0, "system/etc/recovery.img" },
{ 00600, AID_ROOT, AID_ROOT, 0, "vendor/build.prop" },
{ 00600, AID_ROOT, AID_ROOT, 0, "vendor/default.prop" },
{ 00444, AID_ROOT, AID_ROOT, 0, ven_conf_dir + 1 },
{ 00444, AID_ROOT, AID_ROOT, 0, ven_conf_file + 1 },
// the following two files are INTENTIONALLY set-uid, but they
// are NOT included on user builds.
{ 06755, AID_ROOT, AID_ROOT, 0, "system/xbin/procmem" },
{ 04750, AID_ROOT, AID_SHELL, 0, "system/xbin/su" },
// the following files have enhanced capabilities and ARE included
// in user builds.
{ 00700, AID_SYSTEM, AID_SHELL, CAP_MASK_LONG(CAP_BLOCK_SUSPEND),
"system/bin/inputflinger" },
{ 00550, AID_LOGD, AID_LOGD, CAP_MASK_LONG(CAP_SYSLOG) |
CAP_MASK_LONG(CAP_AUDIT_CONTROL) |
CAP_MASK_LONG(CAP_SETGID),
"system/bin/logd" },
{ 00550, AID_SYSTEM, AID_LOG, CAP_MASK_LONG(CAP_SYSLOG),
"system/bin/bootstat" },
{ 00750, AID_ROOT, AID_SHELL, CAP_MASK_LONG(CAP_SETUID) |
CAP_MASK_LONG(CAP_SETGID),
"system/bin/run-as" },
// Support FIFO scheduling mode in SurfaceFlinger.
{ 00755, AID_SYSTEM, AID_GRAPHICS, CAP_MASK_LONG(CAP_SYS_NICE),
"system/bin/surfaceflinger" },
// Support hostapd administering a network interface.
{ 00755, AID_WIFI, AID_WIFI, CAP_MASK_LONG(CAP_NET_ADMIN) |
CAP_MASK_LONG(CAP_NET_RAW),
"vendor/bin/hostapd" },
// Support Bluetooth legacy hal accessing /sys/class/rfkill
// Support RT scheduling in Bluetooth
{ 00700, AID_BLUETOOTH, AID_BLUETOOTH, CAP_MASK_LONG(CAP_NET_ADMIN) |
CAP_MASK_LONG(CAP_SYS_NICE),
"vendor/bin/hw/android.hardware.bluetooth@1.0-service" },
// Support wifi_hal_legacy administering a network interface.
{ 00755, AID_WIFI, AID_WIFI, CAP_MASK_LONG(CAP_NET_ADMIN) |
CAP_MASK_LONG(CAP_NET_RAW),
"vendor/bin/hw/android.hardware.wifi@1.0-service" },
// A non-privileged zygote that spawns isolated processes for web rendering.
{ 0750, AID_ROOT, AID_ROOT, CAP_MASK_LONG(CAP_SETUID) |
CAP_MASK_LONG(CAP_SETGID) |
CAP_MASK_LONG(CAP_SETPCAP),
"system/bin/webview_zygote32" },
{ 0750, AID_ROOT, AID_ROOT, CAP_MASK_LONG(CAP_SETUID) |
CAP_MASK_LONG(CAP_SETGID) |
CAP_MASK_LONG(CAP_SETPCAP),
"system/bin/webview_zygote64" },
// generic defaults
{ 00755, AID_ROOT, AID_ROOT, 0, "bin/*" },
{ 00640, AID_ROOT, AID_SHELL, 0, "fstab.*" },
{ 00750, AID_ROOT, AID_SHELL, 0, "init*" },
{ 00750, AID_ROOT, AID_SHELL, 0, "sbin/*" },
{ 00755, AID_ROOT, AID_SHELL, 0, "system/bin/*" },
{ 00755, AID_ROOT, AID_ROOT, 0, "system/lib/valgrind/*" },
{ 00755, AID_ROOT, AID_ROOT, 0, "system/lib64/valgrind/*" },
{ 00755, AID_ROOT, AID_SHELL, 0, "system/xbin/*" },
{ 00755, AID_ROOT, AID_SHELL, 0, "vendor/bin/*" },
{ 00755, AID_ROOT, AID_SHELL, 0, "vendor/xbin/*" },
{ 00644, AID_ROOT, AID_ROOT, 0, 0 },
// clang-format on
};
#ifndef __ANDROID_VNDK__
auto __for_testing_only__android_files = android_files;
#endif
static size_t strip(const char* path, size_t len, const char suffix[]) {
if (len < strlen(suffix)) return len;
if (strncmp(path + len - strlen(suffix), suffix, strlen(suffix))) return len;
return len - strlen(suffix);
}
static int fs_config_open(int dir, int which, const char* target_out_path) {
int fd = -1;
if (target_out_path && *target_out_path) {
// target_out_path is the path to the directory holding content of
// system partition but as we cannot guarantee it ends with '/system'
// or with or without a trailing slash, need to strip them carefully.
char* name = NULL;
size_t len = strlen(target_out_path);
len = strip(target_out_path, len, "/");
len = strip(target_out_path, len, "/system");
if (asprintf(&name, "%.*s%s", (int)len, target_out_path, conf[which][dir]) != -1) {
fd = TEMP_FAILURE_RETRY(open(name, O_RDONLY | O_BINARY));
free(name);
}
}
if (fd < 0) {
fd = TEMP_FAILURE_RETRY(open(conf[which][dir], O_RDONLY | O_BINARY));
}
return fd;
}
// if path is "vendor/<stuff>", "oem/<stuff>" or "odm/<stuff>"
static bool is_partition(const char* path, size_t len) {
static const char* partitions[] = {"vendor/", "oem/", "odm/"};
for (size_t i = 0; i < (sizeof(partitions) / sizeof(partitions[0])); ++i) {
size_t plen = strlen(partitions[i]);
if (len <= plen) continue;
if (!strncmp(path, partitions[i], plen)) return true;
}
return false;
}
static inline bool prefix_cmp(bool partial, const char* prefix, size_t len, const char* path,
size_t plen) {
return ((partial && plen >= len) || (plen == len)) && !strncmp(prefix, path, len);
}
// alias prefixes of "<partition>/<stuff>" to "system/<partition>/<stuff>" or
// "system/<partition>/<stuff>" to "<partition>/<stuff>"
static bool fs_config_cmp(bool partial, const char* prefix, size_t len, const char* path,
size_t plen) {
// If name ends in * then allow partial matches.
if (!partial && prefix[len - 1] == '*') {
len--;
partial = true;
}
if (prefix_cmp(partial, prefix, len, path, plen)) return true;
static const char system[] = "system/";
if (!strncmp(path, system, strlen(system))) {
path += strlen(system);
plen -= strlen(system);
} else if (len <= strlen(system)) {
return false;
} else if (strncmp(prefix, system, strlen(system))) {
return false;
} else {
prefix += strlen(system);
len -= strlen(system);
}
return is_partition(prefix, len) && prefix_cmp(partial, prefix, len, path, plen);
}
#ifndef __ANDROID_VNDK__
auto __for_testing_only__fs_config_cmp = fs_config_cmp;
#endif
void fs_config(const char* path, int dir, const char* target_out_path, unsigned* uid, unsigned* gid,
unsigned* mode, uint64_t* capabilities) {
const struct fs_path_config* pc;
size_t which, plen;
if (path[0] == '/') {
path++;
}
plen = strlen(path);
for (which = 0; which < (sizeof(conf) / sizeof(conf[0])); ++which) {
struct fs_path_config_from_file header;
int fd = fs_config_open(dir, which, target_out_path);
if (fd < 0) continue;
while (TEMP_FAILURE_RETRY(read(fd, &header, sizeof(header))) == sizeof(header)) {
char* prefix;
uint16_t host_len = get2LE((const uint8_t*)&header.len);
ssize_t len, remainder = host_len - sizeof(header);
if (remainder <= 0) {
ALOGE("%s len is corrupted", conf[which][dir]);
break;
}
prefix = static_cast<char*>(calloc(1, remainder));
if (!prefix) {
ALOGE("%s out of memory", conf[which][dir]);
break;
}
if (TEMP_FAILURE_RETRY(read(fd, prefix, remainder)) != remainder) {
free(prefix);
ALOGE("%s prefix is truncated", conf[which][dir]);
break;
}
len = strnlen(prefix, remainder);
if (len >= remainder) { // missing a terminating null
free(prefix);
ALOGE("%s is corrupted", conf[which][dir]);
break;
}
if (fs_config_cmp(dir, prefix, len, path, plen)) {
free(prefix);
close(fd);
*uid = get2LE((const uint8_t*)&(header.uid));
*gid = get2LE((const uint8_t*)&(header.gid));
*mode = (*mode & (~07777)) | get2LE((const uint8_t*)&(header.mode));
*capabilities = get8LE((const uint8_t*)&(header.capabilities));
return;
}
free(prefix);
}
close(fd);
}
for (pc = dir ? android_dirs : android_files; pc->prefix; pc++) {
if (fs_config_cmp(dir, pc->prefix, strlen(pc->prefix), path, plen)) {
break;
}
}
*uid = pc->uid;
*gid = pc->gid;
*mode = (*mode & (~07777)) | pc->mode;
*capabilities = pc->capabilities;
}
ssize_t fs_config_generate(char* buffer, size_t length, const struct fs_path_config* pc) {
struct fs_path_config_from_file* p = (struct fs_path_config_from_file*)buffer;
size_t len = ALIGN(sizeof(*p) + strlen(pc->prefix) + 1, sizeof(uint64_t));
if ((length < len) || (len > UINT16_MAX)) {
return -ENOSPC;
}
memset(p, 0, len);
uint16_t host_len = len;
p->len = get2LE((const uint8_t*)&host_len);
p->mode = get2LE((const uint8_t*)&(pc->mode));
p->uid = get2LE((const uint8_t*)&(pc->uid));
p->gid = get2LE((const uint8_t*)&(pc->gid));
p->capabilities = get8LE((const uint8_t*)&(pc->capabilities));
strcpy(p->prefix, pc->prefix);
return len;
}
Reference in a new issue View git blame Copy permalink