tequilaOS/platform_system_vold
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Move to modern utility methods from android::base.

Browse source 
Moves away from crufty char* operations to std::string utility
methods, including android::base methods for splitting/parsing.

Rewrite of how Process handles scanning procfs for filesystem
references; now uses fts(3) for more sane traversal.

Replace sscanf() with new FindValue() method, also has unit tests.

Remove some unused methods.  Switch almost everyone over to using
modern logging library.

Test: cts-tradefed run commandAndExit cts-dev -m CtsOsTestCases -t android.os.storage.cts.StorageManagerTest
Test: cts-tradefed run commandAndExit cts-dev --abi armeabi-v7a -m CtsAppSecurityHostTestCases -t android.appsecurity.cts.AdoptableHostTest
Bug: 67041047
Change-Id: I70dc512f21459d1e25b187f24289002b2c7bc7af
This commit is contained in:
Jeff Sharkey 2017-10-06 18:02:53 -06:00
parent 3b71fc5100
commit 3472e52fc2
23 changed files with 329 additions and 593 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

78
Devmapper.cpp
View file

@ -30,11 +30,8 @@
#include <linux/kdev_t.h>
#define LOG_TAG "Vold"
#include <cutils/log.h>
#include <android-base/logging.h>
#include <android-base/strings.h>
#include <android-base/stringprintf.h>
#include <utils/Trace.h>
@ -62,42 +59,6 @@ void Devmapper::ioctlInit(struct dm_ioctl *io, size_t dataSize,
}
}
int Devmapper::lookupActive(const char *name_raw, char *ubuffer, size_t len) {
auto name_string = StringPrintf("%s%s", kVoldPrefix, name_raw);
const char* name = name_string.c_str();
char *buffer = (char *) malloc(DEVMAPPER_BUFFER_SIZE);
if (!buffer) {
SLOGE("Error allocating memory (%s)", strerror(errno));
return -1;
}
int fd;
if ((fd = open("/dev/device-mapper", O_RDWR | O_CLOEXEC)) < 0) {
SLOGE("Error opening devmapper (%s)", strerror(errno));
free(buffer);
return -1;
}
struct dm_ioctl *io = (struct dm_ioctl *) buffer;
ioctlInit(io, DEVMAPPER_BUFFER_SIZE, name, 0);
if (ioctl(fd, DM_DEV_STATUS, io)) {
if (errno != ENXIO) {
SLOGE("DM_DEV_STATUS ioctl failed for lookup (%s)", strerror(errno));
}
free(buffer);
close(fd);
return -1;
}
close(fd);
unsigned minor = (io->dev & 0xff) | ((io->dev >> 12) & 0xfff00);
free(buffer);
snprintf(ubuffer, len, "/dev/block/dm-%u", minor);
return 0;
}
int Devmapper::create(const char *name_raw, const char *loopFile, const char *key,
unsigned long numSectors, char *ubuffer, size_t len) {
auto name_string = StringPrintf("%s%s", kVoldPrefix, name_raw);
@ -105,13 +66,13 @@ int Devmapper::create(const char *name_raw, const char *loopFile, const char *ke
char *buffer = (char *) malloc(DEVMAPPER_BUFFER_SIZE);
if (!buffer) {
SLOGE("Error allocating memory (%s)", strerror(errno));
PLOG(ERROR) << "Failed malloc";
return -1;
}
int fd;
if ((fd = open("/dev/device-mapper", O_RDWR | O_CLOEXEC)) < 0) {
SLOGE("Error opening devmapper (%s)", strerror(errno));
PLOG(ERROR) << "Failed open";
free(buffer);
return -1;
}
@ -122,7 +83,7 @@ int Devmapper::create(const char *name_raw, const char *loopFile, const char *ke
ioctlInit(io, DEVMAPPER_BUFFER_SIZE, name, 0);
if (ioctl(fd, DM_DEV_CREATE, io)) {
SLOGE("Error creating device mapping (%s)", strerror(errno));
PLOG(ERROR) << "Failed DM_DEV_CREATE";
free(buffer);
close(fd);
return -1;
@ -137,7 +98,7 @@ int Devmapper::create(const char *name_raw, const char *loopFile, const char *ke
geoParams += strlen(geoParams) + 1;
geoParams = (char *) _align(geoParams, 8);
if (ioctl(fd, DM_DEV_SET_GEOMETRY, io)) {
SLOGE("Error setting device geometry (%s)", strerror(errno));
PLOG(ERROR) << "Failed DM_DEV_SET_GEOMETRY";
free(buffer);
close(fd);
return -1;
@ -146,7 +107,7 @@ int Devmapper::create(const char *name_raw, const char *loopFile, const char *ke
// Retrieve the device number we were allocated
ioctlInit(io, DEVMAPPER_BUFFER_SIZE, name, 0);
if (ioctl(fd, DM_DEV_STATUS, io)) {
SLOGE("Error retrieving devmapper status (%s)", strerror(errno));
PLOG(ERROR) << "Failed DM_DEV_STATUS";
free(buffer);
close(fd);
return -1;
@ -177,7 +138,7 @@ int Devmapper::create(const char *name_raw, const char *loopFile, const char *ke
tgt->next = cryptParams - buffer;
if (ioctl(fd, DM_TABLE_LOAD, io)) {
SLOGE("Error loading mapping table (%s)", strerror(errno));
PLOG(ERROR) << "Failed DM_TABLE_LOAD";
free(buffer);
close(fd);
return -1;
@ -187,7 +148,7 @@ int Devmapper::create(const char *name_raw, const char *loopFile, const char *ke
ioctlInit(io, DEVMAPPER_BUFFER_SIZE, name, 0);
if (ioctl(fd, DM_DEV_SUSPEND, io)) {
SLOGE("Error Resuming (%s)", strerror(errno));
PLOG(ERROR) << "Failed DM_DEV_SUSPEND";
free(buffer);
close(fd);
return -1;
@ -205,13 +166,13 @@ int Devmapper::destroy(const char *name_raw) {
char *buffer = (char *) malloc(DEVMAPPER_BUFFER_SIZE);
if (!buffer) {
SLOGE("Error allocating memory (%s)", strerror(errno));
PLOG(ERROR) << "Failed malloc";
return -1;
}
int fd;
if ((fd = open("/dev/device-mapper", O_RDWR | O_CLOEXEC)) < 0) {
SLOGE("Error opening devmapper (%s)", strerror(errno));
PLOG(ERROR) << "Failed open";
free(buffer);
return -1;
}
@ -223,7 +184,7 @@ int Devmapper::destroy(const char *name_raw) {
if (ioctl(fd, DM_DEV_REMOVE, io)) {
if (errno != ENXIO) {
SLOGE("Error destroying device mapping (%s)", strerror(errno));
PLOG(ERROR) << "Failed DM_DEV_REMOVE";
}
free(buffer);
close(fd);
@ -239,21 +200,21 @@ int Devmapper::destroyAll() {
ATRACE_NAME("Devmapper::destroyAll");
char *buffer = (char *) malloc(1024 * 64);
if (!buffer) {
SLOGE("Error allocating memory (%s)", strerror(errno));
PLOG(ERROR) << "Failed malloc";
return -1;
}
memset(buffer, 0, (1024 * 64));
char *buffer2 = (char *) malloc(DEVMAPPER_BUFFER_SIZE);
if (!buffer2) {
SLOGE("Error allocating memory (%s)", strerror(errno));
PLOG(ERROR) << "Failed malloc";
free(buffer);
return -1;
}
int fd;
if ((fd = open("/dev/device-mapper", O_RDWR | O_CLOEXEC)) < 0) {
SLOGE("Error opening devmapper (%s)", strerror(errno));
PLOG(ERROR) << "Failed open";
free(buffer);
free(buffer2);
return -1;
@ -263,7 +224,7 @@ int Devmapper::destroyAll() {
ioctlInit(io, (1024 * 64), NULL, 0);
if (ioctl(fd, DM_LIST_DEVICES, io)) {
SLOGE("DM_LIST_DEVICES ioctl failed (%s)", strerror(errno));
PLOG(ERROR) << "Failed DM_LIST_DEVICES";
free(buffer);
free(buffer2);
close(fd);
@ -281,19 +242,20 @@ int Devmapper::destroyAll() {
unsigned nxt = 0;
do {
n = (struct dm_name_list *) (((char *) n) + nxt);
if (strncmp(n->name, kVoldPrefix, strlen(kVoldPrefix)) == 0) {
LOG(DEBUG) << "Tearing down stale dm device named " << n->name;
auto name = std::string(n->name);
if (android::base::StartsWith(name, kVoldPrefix)) {
LOG(DEBUG) << "Tearing down stale dm device named " << name;
memset(buffer2, 0, DEVMAPPER_BUFFER_SIZE);
struct dm_ioctl *io2 = (struct dm_ioctl *) buffer2;
ioctlInit(io2, DEVMAPPER_BUFFER_SIZE, n->name, 0);
if (ioctl(fd, DM_DEV_REMOVE, io2)) {
if (errno != ENXIO) {
PLOG(WARNING) << "Failed to destroy dm device named " << n->name;
PLOG(WARNING) << "Failed to destroy dm device named " << name;
}
}
} else {
LOG(VERBOSE) << "Found unmanaged dm device named " << n->name;
LOG(VERBOSE) << "Found unmanaged dm device named " << name;
}
nxt = n->next;
} while (nxt);

1
Devmapper.h
View file

@ -26,7 +26,6 @@ public:
unsigned long numSectors, char *buffer, size_t len);
static int destroy(const char *name);
static int destroyAll();
static int lookupActive(const char *name, char *buffer, size_t len);
private:
static void *_align(void *ptr, unsigned int a);

181
Loop.cpp
View file

@ -31,11 +31,8 @@
#include <linux/kdev_t.h>
#define LOG_TAG "Vold"
#include <cutils/log.h>
#include <android-base/logging.h>
#include <android-base/strings.h>
#include <android-base/stringprintf.h>
#include <android-base/unique_fd.h>
#include <utils/Trace.h>
@ -49,161 +46,6 @@ using android::base::unique_fd;
static const char* kVoldPrefix = "vold:";
int Loop::lookupActive(const char *id_raw, char *buffer, size_t len) {
auto id_string = StringPrintf("%s%s", kVoldPrefix, id_raw);
const char* id = id_string.c_str();
int i;
int fd;
char filename[256];
memset(buffer, 0, len);
for (i = 0; i < LOOP_MAX; i++) {
struct loop_info64 li;
int rc;
snprintf(filename, sizeof(filename), "/dev/block/loop%d", i);
if ((fd = open(filename, O_RDWR | O_CLOEXEC)) < 0) {
if (errno != ENOENT) {
SLOGE("Unable to open %s (%s)", filename, strerror(errno));
} else {
continue;
}
return -1;
}
rc = ioctl(fd, LOOP_GET_STATUS64, &li);
if (rc < 0 && errno == ENXIO) {
close(fd);
continue;
}
close(fd);
if (rc < 0) {
SLOGE("Unable to get loop status for %s (%s)", filename,
strerror(errno));
return -1;
}
if (!strncmp((const char*) li.lo_crypt_name, id, LO_NAME_SIZE)) {
break;
}
}
if (i == LOOP_MAX) {
errno = ENOENT;
return -1;
}
strlcpy(buffer, filename, len);
return 0;
}
int Loop::create(const char *id_raw, const char *loopFile, char *loopDeviceBuffer, size_t len) {
auto id_string = StringPrintf("%s%s", kVoldPrefix, id_raw);
const char* id = id_string.c_str();
int i;
int fd;
char filename[256];
for (i = 0; i < LOOP_MAX; i++) {
struct loop_info64 li;
int rc;
char *secontext = NULL;
snprintf(filename, sizeof(filename), "/dev/block/loop%d", i);
/*
* The kernel starts us off with 8 loop nodes, but more
* are created on-demand if needed.
*/
mode_t mode = 0660 | S_IFBLK;
unsigned int dev = (0xff & i) | ((i << 12) & 0xfff00000) | (7 << 8);
if (sehandle) {
rc = selabel_lookup(sehandle, &secontext, filename, S_IFBLK);
if (rc == 0)
setfscreatecon(secontext);
}
if (mknod(filename, mode, dev) < 0) {
if (errno != EEXIST) {
int sverrno = errno;
SLOGE("Error creating loop device node (%s)", strerror(errno));
if (secontext) {
freecon(secontext);
setfscreatecon(NULL);
}
errno = sverrno;
return -1;
}
}
if (secontext) {
freecon(secontext);
setfscreatecon(NULL);
}
if ((fd = open(filename, O_RDWR | O_CLOEXEC)) < 0) {
SLOGE("Unable to open %s (%s)", filename, strerror(errno));
return -1;
}
rc = ioctl(fd, LOOP_GET_STATUS64, &li);
if (rc < 0 && errno == ENXIO)
break;
close(fd);
if (rc < 0) {
SLOGE("Unable to get loop status for %s (%s)", filename,
strerror(errno));
return -1;
}
}
if (i == LOOP_MAX) {
SLOGE("Exhausted all loop devices");
errno = ENOSPC;
return -1;
}
strlcpy(loopDeviceBuffer, filename, len);
int file_fd;
if ((file_fd = open(loopFile, O_RDWR | O_CLOEXEC)) < 0) {
SLOGE("Unable to open %s (%s)", loopFile, strerror(errno));
close(fd);
return -1;
}
if (ioctl(fd, LOOP_SET_FD, file_fd) < 0) {
SLOGE("Error setting up loopback interface (%s)", strerror(errno));
close(file_fd);
close(fd);
return -1;
}
struct loop_info64 li;
memset(&li, 0, sizeof(li));
strlcpy((char*) li.lo_crypt_name, id, LO_NAME_SIZE);
strlcpy((char*) li.lo_file_name, loopFile, LO_NAME_SIZE);
if (ioctl(fd, LOOP_SET_STATUS64, &li) < 0) {
SLOGE("Error setting loopback status (%s)", strerror(errno));
close(file_fd);
close(fd);
return -1;
}
close(fd);
close(file_fd);
return 0;
}
int Loop::create(const std::string& target, std::string& out_device) {
unique_fd ctl_fd(open("/dev/loop-control", O_RDWR | O_CLOEXEC));
if (ctl_fd.get() == -1) {
@ -251,12 +93,12 @@ int Loop::destroyByDevice(const char *loopDevice) {
device_fd = open(loopDevice, O_RDONLY | O_CLOEXEC);
if (device_fd < 0) {
SLOGE("Failed to open loop (%d)", errno);
PLOG(ERROR) << "Failed to open " << loopDevice;
return -1;
}
if (ioctl(device_fd, LOOP_CLR_FD, 0) < 0) {
SLOGE("Failed to destroy loop (%d)", errno);
PLOG(ERROR) << "Failed to destroy " << loopDevice;
close(device_fd);
return -1;
}
@ -279,7 +121,8 @@ int Loop::destroyAll() {
// Poke through all devices looking for loops
while ((de = readdir(dir))) {
if (strncmp(de->d_name, "loop", 4) != 0) continue;
auto test = std::string(de->d_name);
if (!android::base::StartsWith(test, "loop")) continue;
auto path = root + de->d_name;
unique_fd fd(open(path.c_str(), O_RDWR | O_CLOEXEC));
@ -296,8 +139,8 @@ int Loop::destroyAll() {
continue;
}
char* id = (char*) li.lo_crypt_name;
if (strncmp(id, kVoldPrefix, strlen(kVoldPrefix)) == 0) {
auto id = std::string((char*) li.lo_crypt_name);
if (android::base::StartsWith(id, kVoldPrefix)) {
LOG(DEBUG) << "Tearing down stale loop device at " << path << " named " << id;
if (ioctl(fd.get(), LOOP_CLR_FD, 0) < 0) {
@ -332,22 +175,22 @@ int Loop::resizeImageFile(const char *file, unsigned long numSectors) {
int fd;
if ((fd = open(file, O_RDWR | O_CLOEXEC)) < 0) {
SLOGE("Error opening imagefile (%s)", strerror(errno));
PLOG(ERROR) << "Failed to open " << file;
return -1;
}
SLOGD("Attempting to increase size of %s to %lu sectors.", file, numSectors);
LOG(DEBUG) << "Attempting to increase " << file << " to " << numSectors;
if (fallocate(fd, 0, 0, numSectors * 512)) {
if (errno == ENOSYS || errno == ENOTSUP) {
SLOGW("fallocate not found. Falling back to ftruncate.");
PLOG(WARNING) << "fallocate not found. Falling back to ftruncate.";
if (ftruncate(fd, numSectors * 512) < 0) {
SLOGE("Error truncating imagefile (%s)", strerror(errno));
PLOG(ERROR) << "Failed to ftruncate";
close(fd);
return -1;
}
} else {
SLOGE("Error allocating space (%s)", strerror(errno));
PLOG(ERROR) << "Failed to fallocate";
close(fd);
return -1;
}

2
Loop.h
View file

@ -25,8 +25,6 @@ class Loop {
public:
static const int LOOP_MAX = 4096;
public:
static int lookupActive(const char *id, char *buffer, size_t len);
static int create(const char *id, const char *loopFile, char *loopDeviceBuffer, size_t len);
static int create(const std::string& file, std::string& out_device);
static int destroyByDevice(const char *loopDevice);
static int destroyAll();

8
NetlinkHandler.cpp
View file

@ -19,9 +19,7 @@
#include <errno.h>
#include <string.h>
#define LOG_TAG "Vold"
#include <cutils/log.h>
#include <android-base/logging.h>
#include <sysutils/NetlinkEvent.h>
#include "NetlinkHandler.h"
@ -47,11 +45,11 @@ void NetlinkHandler::onEvent(NetlinkEvent *evt) {
const char *subsys = evt->getSubsystem();
if (!subsys) {
SLOGW("No subsystem found in netlink event");
LOG(WARNING) << "No subsystem found in netlink event";
return;
}
if (!strcmp(subsys, "block")) {
if (std::string(subsys) == "block") {
vm->handleBlockEvent(evt);
}
}

16
NetlinkManager.cpp
View file

@ -26,9 +26,7 @@
#include <linux/netlink.h>
#define LOG_TAG "Vold"
#include <cutils/log.h>
#include <android-base/logging.h>
#include "NetlinkManager.h"
#include "NetlinkHandler.h"
@ -60,7 +58,7 @@ int NetlinkManager::start() {
if ((mSock = socket(PF_NETLINK, SOCK_DGRAM | SOCK_CLOEXEC,
NETLINK_KOBJECT_UEVENT)) < 0) {
SLOGE("Unable to create uevent socket: %s", strerror(errno));
PLOG(ERROR) << "Unable to create uevent socket";
return -1;
}
@ -69,23 +67,23 @@ int NetlinkManager::start() {
// Try using SO_RCVBUF if that fails.
if ((setsockopt(mSock, SOL_SOCKET, SO_RCVBUFFORCE, &sz, sizeof(sz)) < 0) &&
(setsockopt(mSock, SOL_SOCKET, SO_RCVBUF, &sz, sizeof(sz)) < 0)) {
SLOGE("Unable to set uevent socket SO_RCVBUF/SO_RCVBUFFORCE option: %s", strerror(errno));
PLOG(ERROR) << "Unable to set uevent socket SO_RCVBUF/SO_RCVBUFFORCE option";
goto out;
}
if (setsockopt(mSock, SOL_SOCKET, SO_PASSCRED, &on, sizeof(on)) < 0) {
SLOGE("Unable to set uevent socket SO_PASSCRED option: %s", strerror(errno));
PLOG(ERROR) << "Unable to set uevent socket SO_PASSCRED option";
goto out;
}
if (bind(mSock, (struct sockaddr *) &nladdr, sizeof(nladdr)) < 0) {
SLOGE("Unable to bind uevent socket: %s", strerror(errno));
PLOG(ERROR) << "Unable to bind uevent socket";
goto out;
}
mHandler = new NetlinkHandler(mSock);
if (mHandler->start()) {
SLOGE("Unable to start NetlinkHandler: %s", strerror(errno));
PLOG(ERROR) << "Unable to start NetlinkHandler";
goto out;
}
@ -100,7 +98,7 @@ int NetlinkManager::stop() {
int status = 0;
if (mHandler->stop()) {
SLOGE("Unable to stop NetlinkHandler: %s", strerror(errno));
PLOG(ERROR) << "Unable to stop NetlinkHandler";
status = -1;
}
delete mHandler;

229
Process.cpp
View file

@ -19,6 +19,7 @@
#include <errno.h>
#include <string.h>
#include <fcntl.h>
#include <fts.h>
#include <dirent.h>
#include <ctype.h>
#include <pwd.h>
@ -27,196 +28,98 @@
#include <sys/stat.h>
#include <signal.h>
#define LOG_TAG "ProcessKiller"
#include <fstream>
#include <unordered_set>
#include <android-base/file.h>
#include <android-base/parseint.h>
#include <android-base/strings.h>
#include <android-base/stringprintf.h>
#include <android-base/logging.h>
#include <cutils/log.h>
#include "Process.h"
using android::base::ReadFileToString;
using android::base::StringPrintf;
int Process::readSymLink(const char *path, char *link, size_t max) {
struct stat s;
int length;
namespace android {
namespace vold {
if (lstat(path, &s) < 0)
return 0;
if ((s.st_mode & S_IFMT) != S_IFLNK)
return 0;
// we have a symlink
length = readlink(path, link, max- 1);
if (length <= 0)
return 0;
link[length] = 0;
return 1;
}
int Process::pathMatchesMountPoint(const char* path, const char* mountPoint) {
int length = strlen(mountPoint);
if (length > 1 && strncmp(path, mountPoint, length) == 0) {
// we need to do extra checking if mountPoint does not end in a '/'
if (mountPoint[length - 1] == '/')
return 1;
// if mountPoint does not have a trailing slash, we need to make sure
// there is one in the path to avoid partial matches.
return (path[length] == 0 || path[length] == '/');
}
return 0;
}
void Process::getProcessName(int pid, std::string& out_name) {
if (!ReadFileToString(StringPrintf("/proc/%d/cmdline", pid), &out_name)) {
out_name = "???";
}
}
int Process::checkFileDescriptorSymLinks(int pid, const char *mountPoint) {
return checkFileDescriptorSymLinks(pid, mountPoint, NULL, 0);
}
int Process::checkFileDescriptorSymLinks(int pid, const char *mountPoint, char *openFilename, size_t max) {
// compute path to process's directory of open files
char path[PATH_MAX];
snprintf(path, sizeof(path), "/proc/%d/fd", pid);
DIR *dir = opendir(path);
if (!dir)
return 0;
// remember length of the path
int parent_length = strlen(path);
// append a trailing '/'
path[parent_length++] = '/';
struct dirent* de;
while ((de = readdir(dir))) {
if (!strcmp(de->d_name, ".") || !strcmp(de->d_name, "..")
|| strlen(de->d_name) + parent_length + 1 >= PATH_MAX)
continue;
// append the file name, after truncating to parent directory
path[parent_length] = 0;
strlcat(path, de->d_name, PATH_MAX);
char link[PATH_MAX];
if (readSymLink(path, link, sizeof(link)) && pathMatchesMountPoint(link, mountPoint)) {
if (openFilename) {
memset(openFilename, 0, max);
strlcpy(openFilename, link, max);
static bool checkMaps(const std::string& path, const std::string& prefix) {
bool found = false;
std::ifstream infile(path);
std::string line;
while (std::getline(infile, line)) {
std::string::size_type pos = line.find('/');
if (pos != std::string::npos) {
line = line.substr(pos);
if (android::base::StartsWith(line, prefix.c_str())) {
LOG(WARNING) << "Found map " << path << " referencing " << line;
found = true;
}
closedir(dir);
return 1;
}
}
closedir(dir);
return 0;
return found;
}
int Process::checkFileMaps(int pid, const char *mountPoint) {
return checkFileMaps(pid, mountPoint, NULL, 0);
}
int Process::checkFileMaps(int pid, const char *mountPoint, char *openFilename, size_t max) {
FILE *file;
char buffer[PATH_MAX + 100];
snprintf(buffer, sizeof(buffer), "/proc/%d/maps", pid);
file = fopen(buffer, "re");
if (!file)
return 0;
while (fgets(buffer, sizeof(buffer), file)) {
// skip to the path
const char* path = strchr(buffer, '/');
if (path && pathMatchesMountPoint(path, mountPoint)) {
if (openFilename) {
memset(openFilename, 0, max);
strlcpy(openFilename, path, max);
}
fclose(file);
return 1;
static bool checkSymlink(const std::string& path, const std::string& prefix) {
std::string res;
if (android::base::Readlink(path, &res)) {
if (android::base::StartsWith(res, prefix.c_str())) {
LOG(WARNING) << "Found symlink " << path << " referencing " << res;
return true;
}
}
fclose(file);
return 0;
return false;
}
int Process::checkSymLink(int pid, const char *mountPoint, const char *name) {
char path[PATH_MAX];
char link[PATH_MAX];
int KillProcessesWithOpenFiles(const std::string& prefix, int signal) {
std::unordered_set<pid_t> pids;
snprintf(path, sizeof(path), "/proc/%d/%s", pid, name);
if (readSymLink(path, link, sizeof(link)) && pathMatchesMountPoint(link, mountPoint))
return 1;
return 0;
}
int Process::getPid(const char *s) {
int result = 0;
while (*s) {
if (!isdigit(*s)) return -1;
result = 10 * result + (*s++ - '0');
}
return result;
}
extern "C" void vold_killProcessesWithOpenFiles(const char *path, int signal) {
Process::killProcessesWithOpenFiles(path, signal);
}
/*
* Hunt down processes that have files open at the given mount point.
*/
int Process::killProcessesWithOpenFiles(const char *path, int signal) {
int count = 0;
DIR* dir;
struct dirent* de;
if (!(dir = opendir("/proc"))) {
SLOGE("opendir failed (%s)", strerror(errno));
return count;
auto proc_d = std::unique_ptr<DIR, int (*)(DIR*)>(opendir("/proc"), closedir);
if (!proc_d) {
PLOG(ERROR) << "Failed to open proc";
return -1;
}
while ((de = readdir(dir))) {
int pid = getPid(de->d_name);
if (pid == -1)
continue;
struct dirent* proc_de;
while ((proc_de = readdir(proc_d.get())) != nullptr) {
// We only care about valid PIDs
pid_t pid;
if (proc_de->d_type != DT_DIR) continue;
if (!android::base::ParseInt(proc_de->d_name, &pid)) continue;
std::string name;
getProcessName(pid, name);
// Look for references to prefix
bool found = false;
auto path = StringPrintf("/proc/%d", pid);
found |= checkMaps(path + "/maps", prefix);
found |= checkSymlink(path + "/cwd", prefix);
found |= checkSymlink(path + "/root", prefix);
found |= checkSymlink(path + "/exe", prefix);
char openfile[PATH_MAX];
if (checkFileDescriptorSymLinks(pid, path, openfile, sizeof(openfile))) {
SLOGE("Process %s (%d) has open file %s", name.c_str(), pid, openfile);
} else if (checkFileMaps(pid, path, openfile, sizeof(openfile))) {
SLOGE("Process %s (%d) has open filemap for %s", name.c_str(), pid, openfile);
} else if (checkSymLink(pid, path, "cwd")) {
SLOGE("Process %s (%d) has cwd within %s", name.c_str(), pid, path);
} else if (checkSymLink(pid, path, "root")) {
SLOGE("Process %s (%d) has chroot within %s", name.c_str(), pid, path);
} else if (checkSymLink(pid, path, "exe")) {
SLOGE("Process %s (%d) has executable path within %s", name.c_str(), pid, path);
auto fd_path = path + "/fd";
auto fd_d = std::unique_ptr<DIR, int (*)(DIR*)>(opendir(fd_path.c_str()), closedir);
if (!fd_d) {
PLOG(WARNING) << "Failed to open " << fd_path;
} else {
continue;
struct dirent* fd_de;
while ((fd_de = readdir(fd_d.get())) != nullptr) {
if (fd_de->d_type != DT_LNK) continue;
found |= checkSymlink(fd_path + "/" + fd_de->d_name, prefix);
}
}
if (signal != 0) {
SLOGW("Sending %s to process %d", strsignal(signal), pid);
kill(pid, signal);
count++;
if (found) {
pids.insert(pid);
}
}
closedir(dir);
return count;
if (signal != 0) {
for (const auto& pid : pids) {
LOG(WARNING) << "Sending " << strsignal(signal) << " to " << pid;
kill(pid, signal);
}
}
return pids.size();
}
} // namespace vold
} // namespace android

26
Process.h
View file

@ -17,28 +17,12 @@
#ifndef _PROCESS_H
#define _PROCESS_H
#ifdef __cplusplus
namespace android {
namespace vold {
class Process {
public:
static int killProcessesWithOpenFiles(const char *path, int signal);
static int getPid(const char *s);
static int checkSymLink(int pid, const char *path, const char *name);
static int checkFileMaps(int pid, const char *path);
static int checkFileMaps(int pid, const char *path, char *openFilename, size_t max);
static int checkFileDescriptorSymLinks(int pid, const char *mountPoint);
static int checkFileDescriptorSymLinks(int pid, const char *mountPoint, char *openFilename, size_t max);
static void getProcessName(int pid, std::string& out_name);
private:
static int readSymLink(const char *path, char *link, size_t max);
static int pathMatchesMountPoint(const char *path, const char *mountPoint);
};
int KillProcessesWithOpenFiles(const std::string& path, int signal);
extern "C" {
#endif /* __cplusplus */
void vold_killProcessesWithOpenFiles(const char *path, int signal);
#ifdef __cplusplus
}
#endif
} // namespace vold
} // namespace android
#endif

5
TrimTask.cpp
View file

@ -20,7 +20,6 @@
#include <android-base/stringprintf.h>
#include <android-base/logging.h>
#include <cutils/properties.h>
#include <fs_mgr.h>
#include <private/android_filesystem_config.h>
#include <hardware_legacy/power.h>
@ -67,9 +66,9 @@ void TrimTask::addFromFstab() {
struct fstab_rec *prev_rec = NULL;
for (int i = 0; i < fstab->num_entries; i++) {
auto fs_type = std::string(fstab->recs[i].fs_type);
/* Skip raw partitions */
if (!strcmp(fstab->recs[i].fs_type, "emmc") ||
!strcmp(fstab->recs[i].fs_type, "mtd")) {
if (fs_type == "emmc" || fs_type == "mtd") {
continue;
}
/* Skip read-only filesystems */

100
Utils.cpp
View file

@ -22,6 +22,7 @@
#include <android-base/file.h>
#include <android-base/logging.h>
#include <android-base/properties.h>
#include <android-base/strings.h>
#include <android-base/stringprintf.h>
#include <cutils/fs.h>
#include <logwrap/logwrap.h>
@ -129,19 +130,19 @@ status_t ForceUnmount(const std::string& path) {
// we start sending signals
if (!VolumeManager::shutting_down) sleep(5);
Process::killProcessesWithOpenFiles(cpath, SIGINT);
KillProcessesWithOpenFiles(path, SIGINT);
if (!VolumeManager::shutting_down) sleep(5);
if (!umount2(cpath, UMOUNT_NOFOLLOW) || errno == EINVAL || errno == ENOENT) {
return OK;
}
Process::killProcessesWithOpenFiles(cpath, SIGTERM);
KillProcessesWithOpenFiles(path, SIGTERM);
if (!VolumeManager::shutting_down) sleep(5);
if (!umount2(cpath, UMOUNT_NOFOLLOW) || errno == EINVAL || errno == ENOENT) {
return OK;
}
Process::killProcessesWithOpenFiles(cpath, SIGKILL);
KillProcessesWithOpenFiles(path, SIGKILL);
if (!VolumeManager::shutting_down) sleep(5);
if (!umount2(cpath, UMOUNT_NOFOLLOW) || errno == EINVAL || errno == ENOENT) {
return OK;
@ -151,25 +152,24 @@ status_t ForceUnmount(const std::string& path) {
}
status_t KillProcessesUsingPath(const std::string& path) {
const char* cpath = path.c_str();
if (Process::killProcessesWithOpenFiles(cpath, SIGINT) == 0) {
if (KillProcessesWithOpenFiles(path, SIGINT) == 0) {
return OK;
}
if (!VolumeManager::shutting_down) sleep(5);
if (Process::killProcessesWithOpenFiles(cpath, SIGTERM) == 0) {
if (KillProcessesWithOpenFiles(path, SIGTERM) == 0) {
return OK;
}
if (!VolumeManager::shutting_down) sleep(5);
if (Process::killProcessesWithOpenFiles(cpath, SIGKILL) == 0) {
if (KillProcessesWithOpenFiles(path, SIGKILL) == 0) {
return OK;
}
if (!VolumeManager::shutting_down) sleep(5);
// Send SIGKILL a second time to determine if we've
// actually killed everyone with open files
if (Process::killProcessesWithOpenFiles(cpath, SIGKILL) == 0) {
if (KillProcessesWithOpenFiles(path, SIGKILL) == 0) {
return OK;
}
PLOG(ERROR) << "Failed to kill processes using " << path;
@ -184,11 +184,28 @@ status_t BindMount(const std::string& source, const std::string& target) {
return OK;
}
static status_t readMetadata(const std::string& path, std::string& fsType,
std::string& fsUuid, std::string& fsLabel, bool untrusted) {
fsType.clear();
fsUuid.clear();
fsLabel.clear();
bool FindValue(const std::string& raw, const std::string& key, std::string* value) {
auto qual = key + "=\"";
auto start = raw.find(qual);
if (start > 0 && raw[start - 1] != ' ') {
start = raw.find(qual, start + 1);
}
if (start == std::string::npos) return false;
start += qual.length();
auto end = raw.find("\"", start);
if (end == std::string::npos) return false;
*value = raw.substr(start, end - start);
return true;
}
static status_t readMetadata(const std::string& path, std::string* fsType,
std::string* fsUuid, std::string* fsLabel, bool untrusted) {
fsType->clear();
fsUuid->clear();
fsLabel->clear();
std::vector<std::string> cmd;
cmd.push_back(kBlkidPath);
@ -209,36 +226,23 @@ static status_t readMetadata(const std::string& path, std::string& fsType,
return res;
}
char value[128];
for (const auto& line : output) {
// Extract values from blkid output, if defined
const char* cline = line.c_str();
const char* start = strstr(cline, "TYPE=");
if (start != nullptr && sscanf(start + 5, "\"%127[^\"]\"", value) == 1) {
fsType = value;
}
start = strstr(cline, "UUID=");
if (start != nullptr && sscanf(start + 5, "\"%127[^\"]\"", value) == 1) {
fsUuid = value;
}
start = strstr(cline, "LABEL=");
if (start != nullptr && sscanf(start + 6, "\"%127[^\"]\"", value) == 1) {
fsLabel = value;
}
FindValue(line, "TYPE", fsType);
FindValue(line, "UUID", fsUuid);
FindValue(line, "LABEL", fsLabel);
}
return OK;
}
status_t ReadMetadata(const std::string& path, std::string& fsType,
std::string& fsUuid, std::string& fsLabel) {
status_t ReadMetadata(const std::string& path, std::string* fsType,
std::string* fsUuid, std::string* fsLabel) {
return readMetadata(path, fsType, fsUuid, fsLabel, false);
}
status_t ReadMetadataUntrusted(const std::string& path, std::string& fsType,
std::string& fsUuid, std::string& fsLabel) {
status_t ReadMetadataUntrusted(const std::string& path, std::string* fsType,
std::string* fsUuid, std::string* fsLabel) {
return readMetadata(path, fsType, fsUuid, fsLabel, true);
}
@ -673,15 +677,27 @@ status_t RestoreconRecursive(const std::string& path) {
return OK;
}
status_t SaneReadLinkAt(int dirfd, const char* path, char* buf, size_t bufsiz) {
ssize_t len = readlinkat(dirfd, path, buf, bufsiz);
if (len < 0) {
return -1;
} else if (len == (ssize_t) bufsiz) {
return -1;
} else {
buf[len] = '\0';
return 0;
bool Readlinkat(int dirfd, const std::string& path, std::string* result) {
// Shamelessly borrowed from android::base::Readlink()
result->clear();
// Most Linux file systems (ext2 and ext4, say) limit symbolic links to
// 4095 bytes. Since we'll copy out into the string anyway, it doesn't
// waste memory to just start there. We add 1 so that we can recognize
// whether it actually fit (rather than being truncated to 4095).
std::vector<char> buf(4095 + 1);
while (true) {
ssize_t size = readlinkat(dirfd, path.c_str(), &buf[0], buf.size());
// Unrecoverable error?
if (size == -1)
return false;
// It fit! (If size == buf.size(), it may have been truncated.)
if (static_cast<size_t>(size) < buf.size()) {
result->assign(&buf[0], size);
return true;
}
// Double our buffer and try again.
buf.resize(buf.size() * 2);
}
}

13
Utils.h
View file

@ -53,13 +53,15 @@ status_t KillProcessesUsingPath(const std::string& path);
/* Creates bind mount from source to target */
status_t BindMount(const std::string& source, const std::string& target);
bool FindValue(const std::string& raw, const std::string& key, std::string* value);
/* Reads filesystem metadata from device at path */
status_t ReadMetadata(const std::string& path, std::string& fsType,
std::string& fsUuid, std::string& fsLabel);
status_t ReadMetadata(const std::string& path, std::string* fsType,
std::string* fsUuid, std::string* fsLabel);
/* Reads filesystem metadata from untrusted device at path */
status_t ReadMetadataUntrusted(const std::string& path, std::string& fsType,
std::string& fsUuid, std::string& fsLabel);
status_t ReadMetadataUntrusted(const std::string& path, std::string* fsType,
std::string* fsUuid, std::string* fsLabel);
/* Returns either WEXITSTATUS() status, or a negative errno */
status_t ForkExecvp(const std::vector<std::string>& args);
@ -112,7 +114,8 @@ dev_t GetDevice(const std::string& path);
status_t RestoreconRecursive(const std::string& path);
status_t SaneReadLinkAt(int dirfd, const char* path, char* buf, size_t bufsiz);
// TODO: promote to android::base
bool Readlinkat(int dirfd, const std::string& path, std::string* result);
/* Checks if Android is running in QEMU */
bool IsRunningInEmulator();

8
VoldNativeService.cpp
View file

@ -37,10 +37,6 @@
#include <private/android_filesystem_config.h>
#include <utils/Trace.h>
#ifndef LOG_TAG
#define LOG_TAG "vold"
#endif
using android::base::StringPrintf;
using std::endl;
@ -423,7 +419,7 @@ binder::Status VoldNativeService::mkdirs(const std::string& path) {
CHECK_ARGUMENT_PATH(path);
ACQUIRE_LOCK;
return translate(VolumeManager::Instance()->mkdirs(path.c_str()));
return translate(VolumeManager::Instance()->mkdirs(path));
}
binder::Status VoldNativeService::createObb(const std::string& sourcePath,
@ -519,7 +515,7 @@ static int fdeEnableInternal(int32_t passwordType, const std::string& password,
if (rc == 0) {
return 0;
} else if (tries == 0) {
Process::killProcessesWithOpenFiles(DATA_MNT_POINT, SIGKILL);
KillProcessesWithOpenFiles(DATA_MNT_POINT, SIGKILL);
}
}

78
VolumeManager.cpp
View file

@ -19,7 +19,6 @@
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <fts.h>
#include <mntent.h>
#include <stdio.h>
#include <stdlib.h>
@ -34,14 +33,11 @@
#include <linux/kdev_t.h>
#define LOG_TAG "Vold"
#include <openssl/md5.h>
#include <android-base/logging.h>
#include <android-base/properties.h>
#include <android-base/strings.h>
#include <android-base/stringprintf.h>
#include <cutils/fs.h>
#include <cutils/log.h>
#include <utils/Trace.h>
#include <selinux/android.h>
@ -98,7 +94,7 @@ VolumeManager::~VolumeManager() {
int VolumeManager::updateVirtualDisk() {
ATRACE_NAME("VolumeManager::updateVirtualDisk");
if (property_get_bool(kPropVirtualDisk, false)) {
if (android::base::GetBoolProperty(kPropVirtualDisk, false)) {
if (access(kPathVirtualDisk, F_OK) != 0) {
Loop::createImageFile(kPathVirtualDisk, kSizeVirtualDisk / 512);
}
@ -323,13 +319,12 @@ int VolumeManager::linkPrimary(userid_t userId) {
std::string target(StringPrintf("/mnt/user/%d/primary", userId));
if (TEMP_FAILURE_RETRY(unlink(target.c_str()))) {
if (errno != ENOENT) {
SLOGW("Failed to unlink %s: %s", target.c_str(), strerror(errno));
PLOG(WARNING) << "Failed to unlink " << target;
}
}
LOG(DEBUG) << "Linking " << source << " to " << target;
if (TEMP_FAILURE_RETRY(symlink(source.c_str(), target.c_str()))) {
SLOGW("Failed to link %s to %s: %s", source.c_str(), target.c_str(),
strerror(errno));
PLOG(WARNING) << "Failed to link";
return -errno;
}
return 0;
@ -372,12 +367,10 @@ int VolumeManager::setPrimary(const std::shared_ptr<android::vold::VolumeBase>&
return 0;
}
static int unmount_tree(const char* path) {
size_t path_len = strlen(path);
static int unmount_tree(const std::string& prefix) {
FILE* fp = setmntent("/proc/mounts", "r");
if (fp == NULL) {
ALOGE("Error opening /proc/mounts: %s", strerror(errno));
PLOG(ERROR) << "Failed to open /proc/mounts";
return -errno;
}
@ -386,15 +379,16 @@ static int unmount_tree(const char* path) {
std::list<std::string> toUnmount;
mntent* mentry;
while ((mentry = getmntent(fp)) != NULL) {
if (strncmp(mentry->mnt_dir, path, path_len) == 0) {
toUnmount.push_front(std::string(mentry->mnt_dir));
auto test = std::string(mentry->mnt_dir) + "/";
if (android::base::StartsWith(test, prefix.c_str())) {
toUnmount.push_front(test);
}
}
endmntent(fp);
for (const auto& path : toUnmount) {
if (umount2(path.c_str(), MNT_DETACH)) {
ALOGW("Failed to unmount %s: %s", path.c_str(), strerror(errno));
PLOG(ERROR) << "Failed to unmount " << path;
}
}
return 0;
@ -405,8 +399,8 @@ int VolumeManager::remountUid(uid_t uid, const std::string& mode) {
DIR* dir;
struct dirent* de;
char rootName[PATH_MAX];
char pidName[PATH_MAX];
std::string rootName;
std::string pidName;
int pidFd;
int nsFd;
struct stat sb;
@ -418,8 +412,8 @@ int VolumeManager::remountUid(uid_t uid, const std::string& mode) {
}
// Figure out root namespace to compare against below
if (android::vold::SaneReadLinkAt(dirfd(dir), "1/ns/mnt", rootName, PATH_MAX) == -1) {
PLOG(ERROR) << "Failed to readlink";
if (!android::vold::Readlinkat(dirfd(dir), "1/ns/mnt", &rootName)) {
PLOG(ERROR) << "Failed to read root namespace";
closedir(dir);
return -1;
}
@ -443,11 +437,11 @@ int VolumeManager::remountUid(uid_t uid, const std::string& mode) {
// Matches so far, but refuse to touch if in root namespace
LOG(DEBUG) << "Found matching PID " << de->d_name;
if (android::vold::SaneReadLinkAt(pidFd, "ns/mnt", pidName, PATH_MAX) == -1) {
if (!android::vold::Readlinkat(pidFd, "ns/mnt", &pidName)) {
PLOG(WARNING) << "Failed to read namespace for " << de->d_name;
goto next;
}
if (!strcmp(rootName, pidName)) {
if (rootName == pidName) {
LOG(WARNING) << "Skipping due to root namespace";
goto next;
}
@ -465,7 +459,7 @@ int VolumeManager::remountUid(uid_t uid, const std::string& mode) {
_exit(1);
}
unmount_tree("/storage");
unmount_tree("/storage/");
std::string storageSource;
if (mode == "default") {
@ -568,7 +562,7 @@ int VolumeManager::unmountAll() {
// force unmount those just to be safe.
FILE* fp = setmntent("/proc/mounts", "r");
if (fp == NULL) {
SLOGE("Error opening /proc/mounts: %s", strerror(errno));
PLOG(ERROR) << "Failed to open /proc/mounts";
return -errno;
}
@ -577,9 +571,10 @@ int VolumeManager::unmountAll() {
std::list<std::string> toUnmount;
mntent* mentry;
while ((mentry = getmntent(fp)) != NULL) {
if (strncmp(mentry->mnt_dir, "/mnt/", 5) == 0
|| strncmp(mentry->mnt_dir, "/storage/", 9) == 0) {
toUnmount.push_front(std::string(mentry->mnt_dir));
auto test = std::string(mentry->mnt_dir);
if (android::base::StartsWith(test, "/mnt/")
|| android::base::StartsWith(test, "/storage/")) {
toUnmount.push_front(test);
}
}
endmntent(fp);
@ -597,13 +592,13 @@ extern "C" int vold_unmountAll(void) {
return vm->unmountAll();
}
int VolumeManager::mkdirs(const char* path) {
int VolumeManager::mkdirs(const std::string& path) {
// Only offer to create directories for paths managed by vold
if (strncmp(path, "/storage/", 9) == 0) {
if (android::base::StartsWith(path, "/storage/")) {
// fs_mkdirs() does symlink checking and relative path enforcement
return fs_mkdirs(path, 0700);
return fs_mkdirs(path.c_str(), 0700);
} else {
SLOGE("Failed to find mounted volume for %s", path);
LOG(ERROR) << "Failed to find mounted volume for " << path;
return -EINVAL;
}
}
@ -694,21 +689,14 @@ static android::status_t runCommandInNamespace(const std::string& command,
// Matches so far, but refuse to touch if in root namespace
{
char rootName[PATH_MAX];
char pidName[PATH_MAX];
const int root_result =
android::vold::SaneReadLinkAt(dir.get(), "1/ns/mnt", rootName, PATH_MAX);
const int pid_result =
android::vold::SaneReadLinkAt(pid_fd.get(), "ns/mnt", pidName, PATH_MAX);
if (root_result == -1) {
LOG(ERROR) << "Failed to readlink for /proc/1/ns/mnt";
std::string rootName;
std::string pidName;
if (!android::vold::Readlinkat(dir.get(), "1/ns/mnt", &rootName)
|| !android::vold::Readlinkat(pid_fd.get(), "ns/mnt", &pidName)) {
PLOG(ERROR) << "Failed to read namespaces";
return -EPERM;
}
if (pid_result == -1) {
LOG(ERROR) << "Failed to readlink for /proc/" << pid << "/ns/mnt";
return -EPERM;
}
if (!strcmp(rootName, pidName)) {
if (rootName == pidName) {
LOG(ERROR) << "Don't mount appfuse in root namespace";
return -EPERM;
}

2
VolumeManager.h
View file

@ -123,7 +123,7 @@ public:
* is treated as filename and ignored, unless the path ends with "/". Also
* ensures that path belongs to a volume managed by vold.
*/
int mkdirs(const char* path);
int mkdirs(const std::string& path);
int createObb(const std::string& path, const std::string& key, int32_t ownerGid,
std::string* outVolId);

6
cryptfs.cpp
View file

@ -1277,10 +1277,10 @@ int wait_and_unmount(const char *mountpoint, bool kill)
if (kill) {
if (i == (WAIT_UNMOUNT_COUNT - 3)) {
SLOGW("sending SIGHUP to processes with open files\n");
vold_killProcessesWithOpenFiles(mountpoint, SIGTERM);
android::vold::KillProcessesWithOpenFiles(mountpoint, SIGTERM);
} else if (i == (WAIT_UNMOUNT_COUNT - 2)) {
SLOGW("sending SIGKILL to processes with open files\n");
vold_killProcessesWithOpenFiles(mountpoint, SIGKILL);
android::vold::KillProcessesWithOpenFiles(mountpoint, SIGKILL);
}
}
@ -1291,7 +1291,7 @@ int wait_and_unmount(const char *mountpoint, bool kill)
SLOGD("unmounting %s succeeded\n", mountpoint);
rc = 0;
} else {
vold_killProcessesWithOpenFiles(mountpoint, 0);
android::vold::KillProcessesWithOpenFiles(mountpoint, 0);
SLOGE("unmounting %s failed: %s\n", mountpoint, strerror(err));
rc = -1;
}

2
fs/Ext4.cpp
View file

@ -146,7 +146,7 @@ status_t Mount(const std::string& source, const std::string& target, bool ro,
rc = mount(c_source, c_target, "ext4", flags, NULL);
if (rc && errno == EROFS) {
SLOGE("%s appears to be a read only filesystem - retrying mount RO", c_source);
LOG(ERROR) << source << " appears to be a read only filesystem - retrying mount RO";
flags |= MS_RDONLY;
rc = mount(c_source, c_target, "ext4", flags, NULL);
}

49
fs/Vfat.cpp
View file

@ -35,12 +35,8 @@
#include <linux/kdev_t.h>
#define LOG_TAG "Vold"
#include <android-base/logging.h>
#include <android-base/stringprintf.h>
#include <cutils/log.h>
#include <cutils/properties.h>
#include <selinux/selinux.h>
#include <logwrap/logwrap.h>
@ -65,11 +61,6 @@ bool IsSupported() {
}
status_t Check(const std::string& source) {
if (access(kFsckPath, X_OK)) {
SLOGW("Skipping fs checks\n");
return 0;
}
int pass = 1;
int rc = 0;
do {
@ -83,38 +74,37 @@ status_t Check(const std::string& source) {
rc = ForkExecvp(cmd, sFsckUntrustedContext);
if (rc < 0) {
SLOGE("Filesystem check failed due to logwrap error");
LOG(ERROR) << "Filesystem check failed due to logwrap error";
errno = EIO;
return -1;
}
switch(rc) {
case 0:
SLOGI("Filesystem check completed OK");
LOG(INFO) << "Filesystem check completed OK";
return 0;
case 2:
SLOGE("Filesystem check failed (not a FAT filesystem)");
LOG(ERROR) << "Filesystem check failed (not a FAT filesystem)";
errno = ENODATA;
return -1;
case 4:
if (pass++ <= 3) {
SLOGW("Filesystem modified - rechecking (pass %d)",
pass);
LOG(WARNING) << "Filesystem modified - rechecking (pass " << pass << ")";
continue;
}
SLOGE("Failing check after too many rechecks");
LOG(ERROR) << "Failing check after too many rechecks";
errno = EIO;
return -1;
case 8:
SLOGE("Filesystem check failed (no filesystem)");
LOG(ERROR) << "Filesystem check failed (no filesystem)";
errno = ENODATA;
return -1;
default:
SLOGE("Filesystem check failed (unknown exit code %d)", rc);
LOG(ERROR) << "Filesystem check failed (unknown exit code " << rc << ")";
errno = EIO;
return -1;
}
@ -128,7 +118,6 @@ status_t Mount(const std::string& source, const std::string& target, bool ro,
bool createLost) {
int rc;
unsigned long flags;
char mountData[255];
const char* c_source = source.c_str();
const char* c_target = target.c_str();
@ -139,31 +128,29 @@ status_t Mount(const std::string& source, const std::string& target, bool ro,
flags |= (ro ? MS_RDONLY : 0);
flags |= (remount ? MS_REMOUNT : 0);
snprintf(mountData, sizeof(mountData),
auto mountData = android::base::StringPrintf(
"utf8,uid=%d,gid=%d,fmask=%o,dmask=%o,shortname=mixed",
ownerUid, ownerGid, permMask, permMask);
rc = mount(c_source, c_target, "vfat", flags, mountData);
rc = mount(c_source, c_target, "vfat", flags, mountData.c_str());
if (rc && errno == EROFS) {
SLOGE("%s appears to be a read only filesystem - retrying mount RO", c_source);
LOG(ERROR) << source << " appears to be a read only filesystem - retrying mount RO";
flags |= MS_RDONLY;
rc = mount(c_source, c_target, "vfat", flags, mountData);
rc = mount(c_source, c_target, "vfat", flags, mountData.c_str());
}
if (rc == 0 && createLost) {
char *lost_path;
asprintf(&lost_path, "%s/LOST.DIR", c_target);
if (access(lost_path, F_OK)) {
auto lost_path = android::base::StringPrintf("%s/LOST.DIR", target.c_str());
if (access(lost_path.c_str(), F_OK)) {
/*
* Create a LOST.DIR in the root so we have somewhere to put
* lost cluster chains (fsck_msdos doesn't currently do this)
*/
if (mkdir(lost_path, 0755)) {
SLOGE("Unable to create LOST.DIR (%s)", strerror(errno));
if (mkdir(lost_path.c_str(), 0755)) {
PLOG(ERROR) << "Unable to create LOST.DIR";
}
}
free(lost_path);
}
return rc;
@ -189,16 +176,16 @@ status_t Format(const std::string& source, unsigned long numSectors) {
int rc = ForkExecvp(cmd);
if (rc < 0) {
SLOGE("Filesystem format failed due to logwrap error");
LOG(ERROR) << "Filesystem format failed due to logwrap error";
errno = EIO;
return -1;
}
if (rc == 0) {
SLOGI("Filesystem formatted OK");
LOG(INFO) << "Filesystem formatted OK";
return 0;
} else {
SLOGE("Format failed (unknown exit code %d)", rc);
LOG(ERROR) << "Format failed (unknown exit code " << rc << ")";
errno = EIO;
return -1;
}

10
main.cpp
View file

@ -25,9 +25,9 @@
#include "sehandle.h"
#include <android-base/logging.h>
#include <android-base/properties.h>
#include <android-base/stringprintf.h>
#include <cutils/klog.h>
#include <cutils/properties.h>
#include <utils/Trace.h>
#include <stdio.h>
@ -88,7 +88,7 @@ int main(int argc, char** argv) {
exit(1);
}
if (property_get_bool("vold.debug", false)) {
if (android::base::GetBoolProperty("vold.debug", false)) {
vm->setDebug(true);
}
@ -120,8 +120,8 @@ int main(int argc, char** argv) {
// This call should go after listeners are started to avoid
// a deadlock between vold and init (see b/34278978 for details)
property_set("vold.has_adoptable", has_adoptable ? "1" : "0");
property_set("vold.has_quota", has_quota ? "1" : "0");
android::base::SetProperty("vold.has_adoptable", has_adoptable ? "1" : "0");
android::base::SetProperty("vold.has_quota", has_quota ? "1" : "0");
// Do coldboot here so it won't block booting,
// also the cold boot is needed in case we have flash drive
@ -240,7 +240,7 @@ static int process_config(VolumeManager *vm, bool* has_adoptable, bool* has_quot
*has_adoptable = true;
}
if (fs_mgr_is_noemulatedsd(rec)
|| property_get_bool("vold.debug.default_primary", false)) {
|| android::base::GetBoolProperty("vold.debug.default_primary", false)) {
flags |= android::vold::Disk::Flags::kDefaultPrimary;
}

59
model/Disk.cpp
View file

@ -26,6 +26,8 @@
#include <android-base/logging.h>
#include <android-base/properties.h>
#include <android-base/stringprintf.h>
#include <android-base/strings.h>
#include <android-base/parseint.h>
#include <diskconfig/diskconfig.h>
#include <ext4_utils/ext4_crypt.h>
@ -263,7 +265,11 @@ status_t Disk::readMetadata() {
PLOG(WARNING) << "Failed to read manufacturer from " << path;
return -errno;
}
uint64_t manfid = strtoll(tmp.c_str(), nullptr, 16);
int64_t manfid;
if (!android::base::ParseInt(tmp, &manfid)) {
PLOG(WARNING) << "Failed to parse manufacturer " << tmp;
return -EINVAL;
}
// Our goal here is to give the user a meaningful label, ideally
// matching whatever is silk-screened on the card. To reduce
// user confusion, this list doesn't contain white-label manfid.
@ -295,7 +301,7 @@ status_t Disk::readMetadata() {
}
status_t Disk::readPartitions() {
int8_t maxMinors = getMaxMinors();
int maxMinors = getMaxMinors();
if (maxMinors < 0) {
return -ENOTSUP;
}
@ -324,31 +330,40 @@ status_t Disk::readPartitions() {
Table table = Table::kUnknown;
bool foundParts = false;
for (const auto& line : output) {
char* cline = (char*) line.c_str();
char* token = strtok(cline, kSgdiskToken);
if (token == nullptr) continue;
auto split = android::base::Split(line, kSgdiskToken);
auto it = split.begin();
if (it == split.end()) continue;
if (!strcmp(token, "DISK")) {
const char* type = strtok(nullptr, kSgdiskToken);
if (!strcmp(type, "mbr")) {
if (*it == "DISK") {
if (++it == split.end()) continue;
if (*it == "mbr") {
table = Table::kMbr;
} else if (!strcmp(type, "gpt")) {
} else if (*it == "gpt") {
table = Table::kGpt;
} else {
LOG(WARNING) << "Invalid partition table " << *it;
continue;
}
} else if (!strcmp(token, "PART")) {
} else if (*it == "PART") {
foundParts = true;
int i = strtol(strtok(nullptr, kSgdiskToken), nullptr, 10);
if (i <= 0 || i > maxMinors) {
LOG(WARNING) << mId << " is ignoring partition " << i
<< " beyond max supported devices";
if (++it == split.end()) continue;
int i = 0;
if (!android::base::ParseInt(*it, &i, 1, maxMinors)) {
LOG(WARNING) << "Invalid partition number " << *it;
continue;
}
dev_t partDevice = makedev(major(mDevice), minor(mDevice) + i);
if (table == Table::kMbr) {
const char* type = strtok(nullptr, kSgdiskToken);
if (++it == split.end()) continue;
int type = 0;
if (!android::base::ParseInt("0x" + *it, &type)) {
LOG(WARNING) << "Invalid partition type " << *it;
continue;
}
switch (strtol(type, nullptr, 16)) {
switch (type) {
case 0x06: // FAT16
case 0x0b: // W95 FAT32 (LBA)
case 0x0c: // W95 FAT32 (LBA)
@ -357,12 +372,14 @@ status_t Disk::readPartitions() {
break;
}
} else if (table == Table::kGpt) {
const char* typeGuid = strtok(nullptr, kSgdiskToken);
const char* partGuid = strtok(nullptr, kSgdiskToken);
if (++it == split.end()) continue;
auto typeGuid = *it;
if (++it == split.end()) continue;
auto partGuid = *it;
if (!strcasecmp(typeGuid, kGptBasicData)) {
if (android::base::EqualsIgnoreCase(typeGuid, kGptBasicData)) {
createPublicVolume(partDevice);
} else if (!strcasecmp(typeGuid, kGptAndroidExpand)) {
} else if (android::base::EqualsIgnoreCase(typeGuid, kGptAndroidExpand)) {
createPrivateVolume(partDevice, partGuid);
}
}
@ -375,7 +392,7 @@ status_t Disk::readPartitions() {
std::string fsType;
std::string unused;
if (ReadMetadataUntrusted(mDevPath, fsType, unused, unused) == OK) {
if (ReadMetadataUntrusted(mDevPath, &fsType, &unused, &unused) == OK) {
createPublicVolume(mDevice);
} else {
LOG(WARNING) << mId << " failed to identify, giving up";

2
model/PrivateVolume.cpp
View file

@ -53,7 +53,7 @@ PrivateVolume::~PrivateVolume() {
}
status_t PrivateVolume::readMetadata() {
status_t res = ReadMetadata(mDmDevPath, mFsType, mFsUuid, mFsLabel);
status_t res = ReadMetadata(mDmDevPath, &mFsType, &mFsUuid, &mFsLabel);
auto listener = getListener();
if (listener) listener->onVolumeMetadataChanged(getId(), mFsType, mFsUuid, mFsLabel);

2
model/PublicVolume.cpp
View file

@ -52,7 +52,7 @@ PublicVolume::~PublicVolume() {
}
status_t PublicVolume::readMetadata() {
status_t res = ReadMetadataUntrusted(mDevPath, mFsType, mFsUuid, mFsLabel);
status_t res = ReadMetadataUntrusted(mDevPath, &mFsType, &mFsUuid, &mFsLabel);
auto listener = getListener();
if (listener) listener->onVolumeMetadataChanged(getId(), mFsType, mFsUuid, mFsLabel);

1
tests/Android.mk
View file

@ -12,6 +12,7 @@ LOCAL_STATIC_LIBRARIES := libbase libselinux libvold liblog libcrypto
LOCAL_SRC_FILES := \
cryptfs_test.cpp \
Utils_test.cpp \
VolumeManager_test.cpp \
LOCAL_MODULE := vold_tests

44
tests/Utils_test.cpp Normal file
View file

@ -0,0 +1,44 @@
/*
* Copyright (C) 2017 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 <gtest/gtest.h>
#include "../Utils.h"
namespace android {
namespace vold {
class UtilsTest : public testing::Test {
};
TEST_F(UtilsTest, FindValueTest) {
std::string tmp;
ASSERT_FALSE(FindValue("", "KEY", &tmp));
ASSERT_FALSE(FindValue("BADKEY=\"VALUE\"", "KEY", &tmp));
ASSERT_TRUE(FindValue("KEY=\"VALUE\"", "KEY", &tmp));
ASSERT_EQ("VALUE", tmp);
ASSERT_TRUE(FindValue("FOO=\"BAR\" KEY=\"VALUE VALUE\" BAR=\"BAZ\"", "KEY", &tmp));
ASSERT_EQ("VALUE VALUE", tmp);
ASSERT_TRUE(FindValue("BADKEY=\"VALUE\" KEY=\"BAZ\"", "KEY", &tmp));
ASSERT_EQ("BAZ", tmp);
}
}
}