bool processChangeNotify(const pollfd& pfd)
{
assert(pfd.fd != -1);
assert(pfd.revents & POLLIN);
bool importantChange = false;
int n = read(pfd.fd, &mNotifyBuffer[0], static_cast<int>(mNotifyBuffer.size()));
if (n == -1)
{
rtLogWarn("failed to read change notify buffer: %d", n);
return false;
}
else
{
inotify_event* e = reinterpret_cast<inotify_event *>(&mNotifyBuffer[0]);
if (e->len)
{
size_t n = strlen(e->name);
if ((n > 4) && (strncmp(e->name, "event", 5) == 0))
{
importantChange = true;
if (deviceExists(e->name))
{
rtLogInfo("%s added", e->name);
waitForDevice(kDevInputByPath);
}
else
{
rtLogInfo("device removed: %s", e->name);
}
}
}
}
return importantChange;
}
UMTSStickErr UMTSStick::getSerial(UsbSerial** ppUsbSerial)
{
m_host.init();
UMTSStickErr rc;
rc = waitForDevice();
if(rc)
return rc;
//Device is now enumerated, read table
uint16_t vid = m_pDev->getVid();
uint16_t pid = m_pDev->getPid();
DBG("Configuration set: vid:%04x pid:%04x\n", vid, pid);
bool handled = false;
bool cdfs = false;
const UMTSSwitchingInfo* pInfo;
for(int i = 0; i < UMTS_SWITCHING_COUNT; i++)
{
pInfo = &UMTSwitchingTable[i];
if( !checkDeviceState(pInfo, &cdfs) )
{
handled = true;
break;
}
} //for(int i = 0; i < UMTS_SWITCHING_COUNT; i++)
if(!handled)
{
DBG("Don't know this device!\n");
return UMTSERR_NOTIMPLEMENTED;
}
//Check if the device is in CDFS mode, in this case switch
if(cdfs)
{
DBG("Switching the device by sending a magic packet\n");
rc = switchMode(pInfo);
if(rc)
return rc;
DBG("Now wait for device to reconnect\n");
m_host.releaseDevice(m_pDev);
//Wait for device to reconnect
wait(3);
rc = waitForDevice();
if(rc)
return rc;
}
rc = findSerial(ppUsbSerial);
if(rc)
return rc;
return UMTSERR_OK;
}
void xenstore_parse_domain_config(int domid)
{
char **e = NULL;
char *buf = NULL, *path;
char *fpath = NULL, *bpath = NULL,
*dev = NULL, *params = NULL, *type = NULL, *drv = NULL;
int i, is_scsi, is_hdN = 0;
unsigned int len, num, hd_index;
BlockDriverState *bs;
for(i = 0; i < MAX_DISKS + MAX_SCSI_DISKS; i++)
media_filename[i] = NULL;
xsh = xs_daemon_open();
if (xsh == NULL) {
fprintf(logfile, "Could not contact xenstore for domain config\n");
return;
}
path = xs_get_domain_path(xsh, domid);
if (path == NULL) {
fprintf(logfile, "xs_get_domain_path() error\n");
goto out;
}
if (pasprintf(&buf, "%s/device/vbd", path) == -1)
goto out;
e = xs_directory(xsh, XBT_NULL, buf, &num);
if (e == NULL)
goto out;
for (i = 0; i < num; i++) {
/* read the backend path */
if (pasprintf(&buf, "%s/device/vbd/%s/backend", path, e[i]) == -1)
continue;
free(bpath);
bpath = xs_read(xsh, XBT_NULL, buf, &len);
if (bpath == NULL)
continue;
/* read the name of the device */
if (pasprintf(&buf, "%s/dev", bpath) == -1)
continue;
free(dev);
dev = xs_read(xsh, XBT_NULL, buf, &len);
if (dev == NULL)
continue;
if (!strncmp(dev, "hd", 2)) {
is_hdN = 1;
break;
}
}
for (i = 0; i < num; i++) {
/* read the backend path */
if (pasprintf(&buf, "%s/device/vbd/%s/backend", path, e[i]) == -1)
continue;
free(bpath);
bpath = xs_read(xsh, XBT_NULL, buf, &len);
if (bpath == NULL)
continue;
/* read the name of the device */
if (pasprintf(&buf, "%s/dev", bpath) == -1)
continue;
free(dev);
dev = xs_read(xsh, XBT_NULL, buf, &len);
if (dev == NULL)
continue;
/* Change xvdN to look like hdN */
if (!is_hdN && !strncmp(dev, "xvd", 3)) {
fprintf(logfile, "Change xvd%c to look like hd%c\n",
dev[3], dev[3]);
memmove(dev, dev+1, strlen(dev));
dev[0] = 'h';
dev[1] = 'd';
}
is_scsi = !strncmp(dev, "sd", 2);
if ((strncmp(dev, "hd", 2) && !is_scsi) || strlen(dev) != 3 )
continue;
hd_index = dev[2] - 'a';
if (hd_index >= (is_scsi ? MAX_SCSI_DISKS : MAX_DISKS))
continue;
/* read the type of the device */
if (pasprintf(&buf, "%s/device/vbd/%s/device-type", path, e[i]) == -1)
continue;
free(type);
type = xs_read(xsh, XBT_NULL, buf, &len);
if (pasprintf(&buf, "%s/params", bpath) == -1)
continue;
free(params);
params = xs_read(xsh, XBT_NULL, buf, &len);
if (params == NULL)
continue;
/* read the name of the device */
if (pasprintf(&buf, "%s/type", bpath) == -1)
continue;
free(drv);
drv = xs_read(xsh, XBT_NULL, buf, &len);
if (drv == NULL)
continue;
/* Strip off blktap sub-type prefix aio: - QEMU can autodetect this */
if (!strcmp(drv, "tap") && params[0]) {
char *offset = strchr(params, ':');
if (!offset)
continue ;
memmove(params, offset+1, strlen(offset+1)+1 );
fprintf(logfile, "Strip off blktap sub-type prefix to %s\n", params);
}
/* Prefix with /dev/ if needed */
if (!strcmp(drv, "phy") && params[0] != '/') {
char *newparams = malloc(5 + strlen(params) + 1);
sprintf(newparams, "/dev/%s", params);
free(params);
params = newparams;
}
/*
* check if device has a phantom vbd; the phantom is hooked
* to the frontend device (for ease of cleanup), so lookup
* the frontend device, and see if there is a phantom_vbd
* if there is, we will use resolution as the filename
*/
if (pasprintf(&buf, "%s/device/vbd/%s/phantom_vbd", path, e[i]) == -1)
continue;
free(fpath);
fpath = xs_read(xsh, XBT_NULL, buf, &len);
if (fpath) {
if (pasprintf(&buf, "%s/dev", fpath) == -1)
continue;
free(params);
params = xs_read(xsh, XBT_NULL, buf , &len);
if (params) {
/*
* wait for device, on timeout silently fail because we will
* fail to open below
*/
waitForDevice(params);
}
}
bs = bs_table[hd_index + (is_scsi ? MAX_DISKS : 0)] = bdrv_new(dev);
/* check if it is a cdrom */
if (type && !strcmp(type, "cdrom")) {
bdrv_set_type_hint(bs, BDRV_TYPE_CDROM);
if (pasprintf(&buf, "%s/params", bpath) != -1)
xs_watch(xsh, buf, dev);
}
/* open device now if media present */
if (params[0]) {
if (bdrv_open(bs, params, 0 /* snapshot */) < 0)
fprintf(stderr, "qemu: could not open hard disk image '%s'\n",
params);
}
}
/* Set a watch for log-dirty requests from the migration tools */
if (pasprintf(&buf, "/local/domain/0/device-model/%u/logdirty/next-active",
domid) != -1) {
xs_watch(xsh, buf, "logdirty");
fprintf(logfile, "Watching %s\n", buf);
}
/* Set a watch for suspend requests from the migration tools */
if (pasprintf(&buf,
"/local/domain/0/device-model/%u/command", domid) != -1) {
xs_watch(xsh, buf, "dm-command");
fprintf(logfile, "Watching %s\n", buf);
}
out:
free(type);
free(params);
free(dev);
free(bpath);
free(buf);
free(path);
free(e);
free(drv);
return;
}
