blob: 6926d77f66ce3ee805fc8d68f31c7bf199d5d045 [file] [log] [blame]
/*
* Copyright (C) 2008 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 <stdlib.h>
#include <string.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <sys/mount.h>
#include <linux/kdev_t.h>
#include <cutils/properties.h>
#include "diskmbr.h"
#define LOG_TAG "Vold"
#include <cutils/log.h>
#include "Volume.h"
#include "VolumeManager.h"
#include "ResponseCode.h"
#include "Fat.h"
extern "C" void KillProcessesWithOpenFiles(const char *, int, int, int);
extern "C" void dos_partition_dec(void const *pp, struct dos_partition *d);
extern "C" void dos_partition_enc(void *pp, struct dos_partition *d);
static const char *stateToStr(int state) {
if (state == Volume::State_Init)
return "Initializing";
else if (state == Volume::State_NoMedia)
return "No-Media";
else if (state == Volume::State_Idle)
return "Idle-Unmounted";
else if (state == Volume::State_Pending)
return "Pending";
else if (state == Volume::State_Mounted)
return "Mounted";
else if (state == Volume::State_Unmounting)
return "Unmounting";
else if (state == Volume::State_Checking)
return "Checking";
else if (state == Volume::State_Formatting)
return "Formatting";
else if (state == Volume::State_Shared)
return "Shared-Unmounted";
else if (state == Volume::State_SharedMnt)
return "Shared-Mounted";
else
return "Unknown-Error";
}
Volume::Volume(VolumeManager *vm, const char *label, const char *mount_point) {
mVm = vm;
mLabel = strdup(label);
mMountpoint = strdup(mount_point);
mState = Volume::State_Init;
mCurrentlyMountedKdev = -1;
}
Volume::~Volume() {
free(mLabel);
free(mMountpoint);
}
dev_t Volume::getDiskDevice() {
return MKDEV(0, 0);
};
void Volume::handleVolumeShared() {
}
void Volume::handleVolumeUnshared() {
}
int Volume::handleBlockEvent(NetlinkEvent *evt) {
errno = ENOSYS;
return -1;
}
void Volume::setState(int state) {
char msg[255];
int oldState = mState;
if (oldState == state) {
LOGW("Duplicate state (%d)\n", state);
return;
}
mState = state;
LOGD("Volume %s state changing %d (%s) -> %d (%s)", mLabel,
oldState, stateToStr(oldState), mState, stateToStr(mState));
snprintf(msg, sizeof(msg),
"Volume %s %s state changed from %d (%s) to %d (%s)", getLabel(),
getMountpoint(), oldState, stateToStr(oldState), mState,
stateToStr(mState));
mVm->getBroadcaster()->sendBroadcast(ResponseCode::VolumeStateChange,
msg, false);
}
int Volume::createDeviceNode(const char *path, int major, int minor) {
mode_t mode = 0660 | S_IFBLK;
dev_t dev = (major << 8) | minor;
if (mknod(path, mode, dev) < 0) {
if (errno != EEXIST) {
return -1;
}
}
return 0;
}
int Volume::formatVol() {
if (getState() == Volume::State_NoMedia) {
errno = ENODEV;
return -1;
} else if (getState() != Volume::State_Idle) {
errno = EBUSY;
return -1;
}
if (isMountpointMounted(getMountpoint())) {
LOGW("Volume is idle but appears to be mounted - fixing");
setState(Volume::State_Mounted);
// mCurrentlyMountedKdev = XXX
errno = EBUSY;
return -1;
}
char devicePath[255];
dev_t diskNode = getDiskDevice();
dev_t partNode = MKDEV(MAJOR(diskNode), 1); // XXX: Hmmm
sprintf(devicePath, "/dev/block/vold/%d:%d",
MAJOR(diskNode), MINOR(diskNode));
LOGI("Volume %s (%s) MBR being initialized", getLabel(), devicePath);
if (initializeMbr(devicePath)) {
LOGE("Failed to initialize MBR (%s)", strerror(errno));
goto err;
}
sprintf(devicePath, "/dev/block/vold/%d:%d",
MAJOR(partNode), MINOR(partNode));
LOGI("Volume %s (%s) being formatted", getLabel(), devicePath);
if (Fat::format(devicePath)) {
LOGE("Failed to format (%s)", strerror(errno));
goto err;
}
LOGI("Volume %s (%s) formatted sucessfully", getLabel(), devicePath);
return 0;
err:
return -1;
}
bool Volume::isMountpointMounted(const char *path) {
char device[256];
char mount_path[256];
char rest[256];
FILE *fp;
char line[1024];
if (!(fp = fopen("/proc/mounts", "r"))) {
LOGE("Error opening /proc/mounts (%s)", strerror(errno));
return false;
}
while(fgets(line, sizeof(line), fp)) {
line[strlen(line)-1] = '\0';
sscanf(line, "%255s %255s %255s\n", device, mount_path, rest);
if (!strcmp(mount_path, path)) {
fclose(fp);
return true;
}
}
fclose(fp);
return false;
}
int Volume::mountVol() {
dev_t deviceNodes[4];
int n, i, rc = 0;
char errmsg[255];
if (getState() == Volume::State_NoMedia) {
snprintf(errmsg, sizeof(errmsg),
"Volume %s %s mount failed - no media",
getLabel(), getMountpoint());
mVm->getBroadcaster()->sendBroadcast(
ResponseCode::VolumeMountFailedNoMedia,
errmsg, false);
errno = ENODEV;
return -1;
} else if (getState() != Volume::State_Idle) {
errno = EBUSY;
return -1;
}
if (isMountpointMounted(getMountpoint())) {
LOGW("Volume is idle but appears to be mounted - fixing");
setState(Volume::State_Mounted);
// mCurrentlyMountedKdev = XXX
return 0;
}
n = getDeviceNodes((dev_t *) &deviceNodes, 4);
if (!n) {
LOGE("Failed to get device nodes (%s)\n", strerror(errno));
return -1;
}
for (i = 0; i < n; i++) {
char devicePath[255];
sprintf(devicePath, "/dev/block/vold/%d:%d", MAJOR(deviceNodes[i]),
MINOR(deviceNodes[i]));
LOGI("%s being considered for volume %s\n", devicePath, getLabel());
errno = 0;
setState(Volume::State_Checking);
if ((rc = Fat::check(devicePath))) {
if (errno == ENODATA) {
LOGW("%s does not contain a FAT filesystem\n", devicePath);
continue;
} else {
/* Badness - abort the mount */
LOGE("%s failed FS checks (%s)", devicePath, strerror(errno));
snprintf(errmsg, sizeof(errmsg),
"Volume %s %s mount failed - filesystem check failed",
getLabel(), getMountpoint());
mVm->getBroadcaster()->sendBroadcast(
ResponseCode::VolumeMountFailedDamaged,
errmsg, false);
setState(Volume::State_Idle);
goto out;
}
}
LOGI("%s checks out - attempting to mount\n", devicePath);
errno = 0;
if (!(rc = Fat::doMount(devicePath, getMountpoint(), false, false,
1000, 1015, 0702, true))) {
LOGI("%s sucessfully mounted for volume %s\n", devicePath,
getLabel());
setState(Volume::State_Mounted);
mCurrentlyMountedKdev = deviceNodes[i];
goto out;
}
LOGW("%s failed to mount via VFAT (%s)\n", devicePath, strerror(errno));
}
// XXX: Doesn't handle multiple partitions properly
if (errno == ENODATA) {
snprintf(errmsg, sizeof(errmsg),
"Volume %s %s mount failed - no supported file-systems",
getLabel(), getMountpoint());
mVm->getBroadcaster()->sendBroadcast(
ResponseCode::VolumeMountFailedBlank,
errmsg, false);
}
LOGE("Volume %s found no suitable devices for mounting :(\n", getLabel());
setState(Volume::State_Idle);
out:
return rc;
}
int Volume::unmountVol() {
int i, rc;
if (getState() != Volume::State_Mounted) {
LOGE("Volume %s unmount request when not mounted", getLabel());
errno = EINVAL;
return -1;
}
setState(Volume::State_Unmounting);
for (i = 0; i < 10; i++) {
rc = umount(getMountpoint());
if (!rc)
break;
if (rc && (errno == EINVAL || errno == ENOENT)) {
rc = 0;
break;
}
LOGW("Volume %s unmount attempt %d failed (%s)",
getLabel(), i + 1, strerror(errno));
if (i < 5) {
usleep(1000 * 250);
} else {
KillProcessesWithOpenFiles(getMountpoint(),
(i < 7 ? 0 : 1),
NULL, 0);
usleep(1000 * 250);
}
}
if (!rc) {
LOGI("Volume %s unmounted sucessfully", getLabel());
setState(Volume::State_Idle);
mCurrentlyMountedKdev = -1;
return 0;
}
LOGE("Volume %s failed to unmount (%s)\n", getLabel(), strerror(errno));
setState(Volume::State_Mounted);
return -1;
}
int Volume::initializeMbr(const char *deviceNode) {
int fd, rc;
unsigned char block[512];
struct dos_partition part;
unsigned int nr_sec;
if ((fd = open(deviceNode, O_RDWR)) < 0) {
LOGE("Error opening disk file (%s)", strerror(errno));
return -1;
}
if (ioctl(fd, BLKGETSIZE, &nr_sec)) {
LOGE("Unable to get device size (%s)", strerror(errno));
close(fd);
return -1;
}
memset(&part, 0, sizeof(part));
part.dp_flag = 0x80;
part.dp_typ = 0xc;
part.dp_start = ((1024 * 64) / 512) + 1;
part.dp_size = nr_sec - part.dp_start;
memset(block, 0, sizeof(block));
block[0x1fe] = 0x55;
block[0x1ff] = 0xaa;
dos_partition_enc(block + DOSPARTOFF, &part);
if (write(fd, block, sizeof(block)) < 0) {
LOGE("Error writing MBR (%s)", strerror(errno));
close(fd);
return -1;
}
if (ioctl(fd, BLKRRPART, NULL) < 0) {
LOGE("Error re-reading partition table (%s)", strerror(errno));
close(fd);
return -1;
}
close(fd);
return 0;
}