lib/python/Components/Harddisk.py

   1 from os import system, listdir, statvfs, popen, makedirs, stat, major, minor, path, access
   2 from Tools.Directories import SCOPE_HDD, resolveFilename
   3 from Tools.CList import CList
   4 from SystemInfo import SystemInfo
   5 import time
   6 from Components.Console import Console
   7
   8 def readFile(filename):
   9         file = open(filename)
  10         data = file.read().strip()
  11         file.close()
  12         return data
  13
  14 class Harddisk:
  15         DEVTYPE_UDEV = 0
  16         DEVTYPE_DEVFS = 1
  17
  18         def __init__(self, device):
  19                 self.device = device
  20
  21                 if access("/dev/.udev", 0):
  22                         self.type = self.DEVTYPE_UDEV
  23                 elif access("/dev/.devfsd", 0):
  24                         self.type = self.DEVTYPE_DEVFS
  25                 else:
  26                         print "Unable to determine structure of /dev"
  27
  28                 self.max_idle_time = 0
  29                 self.idle_running = False
  30                 self.timer = None
  31
  32                 self.dev_path = ''
  33                 self.disk_path = ''
  34                 self.phys_path = path.realpath(self.sysfsPath('device'))
  35
  36                 if self.type == self.DEVTYPE_UDEV:
  37                         self.dev_path = '/dev/' + self.device
  38                         self.disk_path = self.dev_path
  39
  40                 elif self.type == self.DEVTYPE_DEVFS:
  41                         tmp = readFile(self.sysfsPath('dev')).split(':')
  42                         s_major = int(tmp[0])
  43                         s_minor = int(tmp[1])
  44                         for disc in listdir("/dev/discs"):
  45                                 dev_path = path.realpath('/dev/discs/' + disc)
  46                                 disk_path = dev_path + '/disc'
  47                                 try:
  48                                         rdev = stat(disk_path).st_rdev
  49                                 except OSError:
  50                                         continue
  51                                 if s_major == major(rdev) and s_minor == minor(rdev):
  52                                         self.dev_path = dev_path
  53                                         self.disk_path = disk_path
  54                                         break
  55
  56                 print "new Harddisk", self.device, '->', self.dev_path, '->', self.disk_path
  57                 self.startIdle()
  58
  59         def __lt__(self, ob):
  60                 return self.device < ob.device
  61
  62         def partitionPath(self, n):
  63                 if self.type == self.DEVTYPE_UDEV:
  64                         return self.dev_path + n
  65                 elif self.type == self.DEVTYPE_DEVFS:
  66                         return self.dev_path + '/part' + n
  67
  68         def sysfsPath(self, filename):
  69                 return path.realpath('/sys/block/' + self.device + '/' + filename)
  70
  71         def stop(self):
  72                 if self.timer:
  73                         self.timer.stop()
  74                         self.timer.callback.remove(self.runIdle)
  75
  76         def bus(self):
  77                 # CF (7025 specific)
  78                 if self.type == self.DEVTYPE_UDEV:
  79                         ide_cf = False  # FIXME
  80                 elif self.type == self.DEVTYPE_DEVFS:
  81                         ide_cf = self.device[:2] == "hd" and "host0" not in self.dev_path
  82
  83                 internal = "pci" in self.phys_path
  84
  85                 if ide_cf:
  86                         ret = "External (CF)"
  87                 elif internal:
  88                         ret = "Internal"
  89                 else:
  90                         ret = "External"
  91                 return ret
  92
  93         def diskSize(self):
  94                 line = readFile(self.sysfsPath('size'))
  95                 try:
  96                         cap = int(line)
  97                 except:
  98                         return 0;
  99                 return cap / 1000 * 512 / 1000
 100
 101         def capacity(self):
 102                 cap = self.diskSize()
 103                 if cap == 0:
 104                         return ""
 105                 return "%d.%03d GB" % (cap/1000, cap%1000)
 106
 107         def model(self):
 108                 if self.device[:2] == "hd":
 109                         return readFile('/proc/ide/' + self.device + '/model')
 110                 elif self.device[:2] == "sd":
 111                         vendor = readFile(self.sysfsPath('device/vendor'))
 112                         model = readFile(self.sysfsPath('device/model'))
 113                         return vendor + '(' + model + ')'
 114                 else:
 115                         assert False, "no hdX or sdX"
 116
 117         def free(self):
 118                 try:
 119                         mounts = open("/proc/mounts")
 120                 except IOError:
 121                         return -1
 122
 123                 lines = mounts.readlines()
 124                 mounts.close()
 125
 126                 for line in lines:
 127                         parts = line.strip().split(" ")
 128                         if path.realpath(parts[0]).startswith(self.dev_path):
 129                                 try:
 130                                         stat = statvfs(parts[1])
 131                                 except OSError:
 132                                         continue
 133                                 return stat.f_bfree/1000 * stat.f_bsize/1000
 134
 135                 return -1
 136
 137         def numPartitions(self):
 138                 numPart = -1
 139                 if self.type == self.DEVTYPE_UDEV:
 140                         try:
 141                                 devdir = listdir('/dev')
 142                         except OSError:
 143                                 return -1
 144                         for filename in devdir:
 145                                 if filename.startswith(self.device):
 146                                         numPart += 1
 147
 148                 elif self.type == self.DEVTYPE_DEVFS:
 149                         try:
 150                                 idedir = listdir(self.dev_path)
 151                         except OSError:
 152                                 return -1
 153                         for filename in idedir:
 154                                 if filename.startswith("disc"):
 155                                         numPart += 1
 156                                 if filename.startswith("part"):
 157                                         numPart += 1
 158                 return numPart
 159
 160         def unmount(self):
 161                 try:
 162                         mounts = open("/proc/mounts")
 163                 except IOError:
 164                         return -1
 165
 166                 lines = mounts.readlines()
 167                 mounts.close()
 168
 169                 cmd = "umount"
 170
 171                 for line in lines:
 172                         parts = line.strip().split(" ")
 173                         if path.realpath(parts[0]).startswith(self.dev_path):
 174                                 cmd = ' ' . join([cmd, parts[1]])
 175
 176                 res = system(cmd)
 177                 return (res >> 8)
 178
 179         def createPartition(self):
 180                 cmd = 'printf "0,\n;\n;\n;\ny\n" | sfdisk -f ' + self.disk_path
 181                 res = system(cmd)
 182                 return (res >> 8)
 183
 184         def mkfs(self):
 185                 cmd = "mkfs.ext3 "
 186                 if self.diskSize() > 4 * 1024:
 187                         cmd += "-T largefile "
 188                 cmd += "-m0 -O dir_index " + self.partitionPath("1")
 189                 res = system(cmd)
 190                 return (res >> 8)
 191
 192         def mount(self):
 193                 try:
 194                         fstab = open("/etc/fstab")
 195                 except IOError:
 196                         return -1
 197
 198                 lines = fstab.readlines()
 199                 fstab.close()
 200
 201                 res = -1
 202                 for line in lines:
 203                         parts = line.strip().split(" ")
 204                         if path.realpath(parts[0]) == self.partitionPath("1"):
 205                                 cmd = "mount -t ext3 " + parts[0]
 206                                 res = system(cmd)
 207                                 break
 208
 209                 return (res >> 8)
 210
 211         def createMovieFolder(self):
 212                 try:
 213                         makedirs(resolveFilename(SCOPE_HDD))
 214                 except OSError:
 215                         return -1
 216                 return 0
 217
 218         def fsck(self):
 219                 # We autocorrect any failures
 220                 # TODO: we could check if the fs is actually ext3
 221                 cmd = "fsck.ext3 -f -p " + self.partitionPath("1")
 222                 res = system(cmd)
 223                 return (res >> 8)
 224
 225         def killPartition(self, n):
 226                 part = self.partitionPath(n)
 227
 228                 if access(part, 0):
 229                         cmd = 'dd bs=512 count=3 if=/dev/zero of=' + part
 230                         res = system(cmd)
 231                 else:
 232                         res = 0
 233
 234                 return (res >> 8)
 235
 236         errorList = [ _("Everything is fine"), _("Creating partition failed"), _("Mkfs failed"), _("Mount failed"), _("Create movie folder failed"), _("Fsck failed"), _("Please Reboot"), _("Filesystem contains uncorrectable errors"), _("Unmount failed")]
 237
 238         def initialize(self):
 239                 self.unmount()
 240
 241                 # Udev tries to mount the partition immediately if there is an
 242                 # old filesystem on it when fdisk reloads the partition table.
 243                 # To prevent that, we overwrite the first 3 sectors of the
 244                 # partition, if the partition existed before. That's enough for
 245                 # ext3 at least.
 246                 self.killPartition("1")
 247
 248                 if self.createPartition() != 0:
 249                         return -1
 250
 251                 if self.mkfs() != 0:
 252                         return -2
 253
 254                 if self.mount() != 0:
 255                         return -3
 256
 257                 if self.createMovieFolder() != 0:
 258                         return -4
 259
 260                 return 0
 261
 262         def check(self):
 263                 self.unmount()
 264
 265                 res = self.fsck()
 266                 if res & 2 == 2:
 267                         return -6
 268
 269                 if res & 4 == 4:
 270                         return -7
 271
 272                 if res != 0 and res != 1:
 273                         # A sum containing 1 will also include a failure
 274                         return -5
 275
 276                 if self.mount() != 0:
 277                         return -3
 278
 279                 return 0
 280
 281         def getDeviceDir(self):
 282                 return self.dev_path
 283
 284         def getDeviceName(self):
 285                 return self.disk_path
 286
 287         # the HDD idle poll daemon.
 288         # as some harddrives have a buggy standby timer, we are doing this by hand here.
 289         # first, we disable the hardware timer. then, we check every now and then if
 290         # any access has been made to the disc. If there has been no access over a specifed time,
 291         # we set the hdd into standby.
 292         def readStats(self):
 293                 try:
 294                         l = open("/sys/block/%s/stat" % self.device).read()
 295                 except IOError:
 296                         return -1,-1
 297                 (nr_read, _, _, _, nr_write) = l.split()[:5]
 298                 return int(nr_read), int(nr_write)
 299
 300         def startIdle(self):
 301                 self.last_access = time.time()
 302                 self.last_stat = 0
 303                 self.is_sleeping = False
 304                 from enigma import eTimer
 305
 306                 # disable HDD standby timer
 307                 Console().ePopen(("hdparm", "hdparm", "-S0", self.disk_path))
 308                 self.timer = eTimer()
 309                 self.timer.callback.append(self.runIdle)
 310                 self.idle_running = True
 311                 self.setIdleTime(self.max_idle_time) # kick the idle polling loop
 312
 313         def runIdle(self):
 314                 if not self.max_idle_time:
 315                         return
 316                 t = time.time()
 317
 318                 idle_time = t - self.last_access
 319
 320                 stats = self.readStats()
 321                 print "nr_read", stats[0], "nr_write", stats[1]
 322                 l = sum(stats)
 323                 print "sum", l, "prev_sum", self.last_stat
 324
 325                 if l != self.last_stat and l >= 0: # access
 326                         print "hdd was accessed since previous check!"
 327                         self.last_stat = l
 328                         self.last_access = t
 329                         idle_time = 0
 330                         self.is_sleeping = False
 331                 else:
 332                         print "hdd IDLE!"
 333
 334                 print "[IDLE]", idle_time, self.max_idle_time, self.is_sleeping
 335                 if idle_time >= self.max_idle_time and not self.is_sleeping:
 336                         self.setSleep()
 337                         self.is_sleeping = True
 338
 339         def setSleep(self):
 340                 Console().ePopen(("hdparm", "hdparm", "-y", self.disk_path))
 341
 342         def setIdleTime(self, idle):
 343                 self.max_idle_time = idle
 344                 if self.idle_running:
 345                         if not idle:
 346                                 self.timer.stop()
 347                         else:
 348                                 self.timer.start(idle * 100, False)  # poll 10 times per period.
 349
 350         def isSleeping(self):
 351                 return self.is_sleeping
 352
 353 class Partition:
 354         def __init__(self, mountpoint, device = None, description = "", force_mounted = False):
 355                 self.mountpoint = mountpoint
 356                 self.description = description
 357                 self.force_mounted = force_mounted
 358                 self.is_hotplug = force_mounted # so far; this might change.
 359                 self.device = device
 360
 361         def stat(self):
 362                 return statvfs(self.mountpoint)
 363
 364         def free(self):
 365                 try:
 366                         s = self.stat()
 367                         return s.f_bavail * s.f_bsize
 368                 except OSError:
 369                         return None
 370
 371         def total(self):
 372                 try:
 373                         s = self.stat()
 374                         return s.f_blocks * s.f_bsize
 375                 except OSError:
 376                         return None
 377
 378         def mounted(self):
 379                 # THANK YOU PYTHON FOR STRIPPING AWAY f_fsid.
 380                 # TODO: can os.path.ismount be used?
 381                 if self.force_mounted:
 382                         return True
 383
 384                 try:
 385                         mounts = open("/proc/mounts")
 386                 except IOError:
 387                         return False
 388
 389                 lines = mounts.readlines()
 390                 mounts.close()
 391
 392                 for line in lines:
 393                         if line.split(' ')[1] == self.mountpoint:
 394                                 return True
 395                 return False
 396
 397 DEVICEDB =  \
 398         {"dm8000":
 399                 {
 400                         # dm8000:
 401                         "/devices/platform/brcm-ehci.0/usb1/1-1/1-1.1/1-1.1:1.0": "Front USB Slot",
 402                         "/devices/platform/brcm-ehci.0/usb1/1-1/1-1.2/1-1.2:1.0": "Back, upper USB Slot",
 403                         "/devices/platform/brcm-ehci.0/usb1/1-1/1-1.3/1-1.3:1.0": "Back, lower USB Slot",
 404                         "/devices/platform/brcm-ehci-1.1/usb2/2-1/2-1:1.0/host1/target1:0:0/1:0:0:0": "DVD Drive",
 405                 },
 406         "dm800":
 407         {
 408                 # dm800:
 409                 "/devices/platform/brcm-ehci.0/usb1/1-2/1-2:1.0": "Upper USB Slot",
 410                 "/devices/platform/brcm-ehci.0/usb1/1-1/1-1:1.0": "Lower USB Slot",
 411         },
 412         "dm7025":
 413         {
 414                 # dm7025:
 415                 "/devices/pci0000:00/0000:00:14.1/ide1/1.0": "CF Card Slot", #hdc
 416                 "/devices/pci0000:00/0000:00:14.1/ide0/0.0": "Internal Harddisk"
 417         }
 418         }
 419
 420 class HarddiskManager:
 421         def __init__(self):
 422                 self.hdd = [ ]
 423                 self.cd = ""
 424                 self.partitions = [ ]
 425
 426                 self.on_partition_list_change = CList()
 427
 428                 self.enumerateBlockDevices()
 429
 430                 # currently, this is just an enumeration of what's possible,
 431                 # this probably has to be changed to support automount stuff.
 432                 # still, if stuff is mounted into the correct mountpoints by
 433                 # external tools, everything is fine (until somebody inserts
 434                 # a second usb stick.)
 435                 p = [
 436                                         ("/media/hdd", _("Harddisk")),
 437                                         ("/media/card", _("Card")),
 438                                         ("/media/cf", _("Compact Flash")),
 439                                         ("/media/mmc1", _("MMC Card")),
 440                                         ("/media/net", _("Network Mount")),
 441                                         ("/media/ram", _("Ram Disk")),
 442                                         ("/media/usb", _("USB Stick")),
 443                                         ("/", _("Internal Flash"))
 444                                 ]
 445
 446                 self.partitions.extend([ Partition(mountpoint = x[0], description = x[1]) for x in p ])
 447
 448         def getBlockDevInfo(self, blockdev):
 449                 devpath = "/sys/block/" + blockdev
 450                 error = False
 451                 removable = False
 452                 blacklisted = False
 453                 is_cdrom = False
 454                 partitions = []
 455                 try:
 456                         removable = bool(int(readFile(devpath + "/removable")))
 457                         dev = int(readFile(devpath + "/dev").split(':')[0])
 458                         if dev in (7, 31): # loop, mtdblock
 459                                 blacklisted = True
 460                         if blockdev[0:2] == 'sr':
 461                                 is_cdrom = True
 462                         if blockdev[0:2] == 'hd':
 463                                 try:
 464                                         media = readFile("/proc/ide/%s/media" % blockdev)
 465                                         if "cdrom" in media:
 466                                                 is_cdrom = True
 467                                 except IOError:
 468                                         error = True
 469                         # check for partitions
 470                         if not is_cdrom:
 471                                 for partition in listdir(devpath):
 472                                         if partition[0:len(blockdev)] != blockdev:
 473                                                 continue
 474                                         partitions.append(partition)
 475                         else:
 476                                 self.cd = blockdev
 477                 except IOError:
 478                         error = True
 479                 # check for medium
 480                 medium_found = True
 481                 try:
 482                         open("/dev/" + blockdev).close()
 483                 except IOError, err:
 484                         if err.errno == 159: # no medium present
 485                                 medium_found = False
 486
 487                 return error, blacklisted, removable, is_cdrom, partitions, medium_found
 488
 489         def enumerateBlockDevices(self):
 490                 print "enumerating block devices..."
 491                 for blockdev in listdir("/sys/block"):
 492                         error, blacklisted, removable, is_cdrom, partitions, medium_found = self.getBlockDevInfo(blockdev)
 493                         print "found block device '%s':" % blockdev,
 494                         if error:
 495                                 print "error querying properties"
 496                         elif blacklisted:
 497                                 print "blacklisted"
 498                         elif not medium_found:
 499                                 print "no medium"
 500                         else:
 501                                 print "ok, removable=%s, cdrom=%s, partitions=%s, device=%s" % (removable, is_cdrom, partitions, blockdev)
 502
 503                                 self.addHotplugPartition(blockdev)
 504                                 for part in partitions:
 505                                         self.addHotplugPartition(part)
 506
 507         def getAutofsMountpoint(self, device):
 508                 return "/autofs/%s/" % (device)
 509
 510         def addHotplugPartition(self, device, physdev = None):
 511                 if not physdev:
 512                         dev, part = self.splitDeviceName(device)
 513                         try:
 514                                 physdev = path.realpath('/sys/block/' + dev + '/device')[4:]
 515                         except OSError:
 516                                 physdev = dev
 517                                 print "couldn't determine blockdev physdev for device", device
 518
 519                 # device is the device name, without /dev
 520                 # physdev is the physical device path, which we (might) use to determine the userfriendly name
 521                 description = self.getUserfriendlyDeviceName(device, physdev)
 522
 523                 p = Partition(mountpoint = self.getAutofsMountpoint(device), description = description, force_mounted = True, device = device)
 524                 self.partitions.append(p)
 525                 self.on_partition_list_change("add", p)
 526
 527                 # see if this is a harddrive
 528                 l = len(device)
 529                 if l and not device[l-1].isdigit():
 530                         error, blacklisted, removable, is_cdrom, partitions, medium_found = self.getBlockDevInfo(device)
 531                         if not blacklisted and not removable and not is_cdrom and medium_found:
 532                                 self.hdd.append(Harddisk(device))
 533                                 self.hdd.sort()
 534                                 SystemInfo["Harddisk"] = len(self.hdd) > 0
 535
 536         def removeHotplugPartition(self, device):
 537                 mountpoint = self.getAutofsMountpoint(device)
 538                 for x in self.partitions[:]:
 539                         if x.mountpoint == mountpoint:
 540                                 self.partitions.remove(x)
 541                                 self.on_partition_list_change("remove", x)
 542                 l = len(device)
 543                 if l and not device[l-1].isdigit():
 544                         for hdd in self.hdd:
 545                                 if hdd.device == device:
 546                                         hdd.stop()
 547                                         self.hdd.remove(hdd)
 548                                         break
 549                         SystemInfo["Harddisk"] = len(self.hdd) > 0
 550
 551         def HDDCount(self):
 552                 return len(self.hdd)
 553
 554         def HDDList(self):
 555                 list = [ ]
 556                 for hd in self.hdd:
 557                         hdd = hd.model() + " - " + hd.bus()
 558                         cap = hd.capacity()
 559                         if cap != "":
 560                                 hdd += " (" + cap + ")"
 561                         list.append((hdd, hd))
 562                 return list
 563
 564         def getCD(self):
 565                 return self.cd
 566
 567         def getMountedPartitions(self, onlyhotplug = False):
 568                 parts = [x for x in self.partitions if (x.is_hotplug or not onlyhotplug) and x.mounted()]
 569                 devs = set([x.device for x in parts])
 570                 for devname in devs.copy():
 571                         if not devname:
 572                                 continue
 573                         dev, part = self.splitDeviceName(devname)
 574                         if part and dev in devs: # if this is a partition and we still have the wholedisk, remove wholedisk
 575                                 devs.remove(dev)
 576
 577                 # return all devices which are not removed due to being a wholedisk when a partition exists
 578                 return [x for x in parts if not x.device or x.device in devs]
 579
 580         def splitDeviceName(self, devname):
 581                 # this works for: sdaX, hdaX, sr0 (which is in fact dev="sr0", part=""). It doesn't work for other names like mtdblock3, but they are blacklisted anyway.
 582                 dev = devname[:3]
 583                 part = devname[3:]
 584                 for p in part:
 585                         if not p.isdigit():
 586                                 return devname, 0
 587                 return dev, part and int(part) or 0
 588
 589         def getUserfriendlyDeviceName(self, dev, phys):
 590                 dev, part = self.splitDeviceName(dev)
 591                 description = "External Storage %s" % dev
 592                 try:
 593                         description = readFile("/sys" + phys + "/model")
 594                 except IOError, s:
 595                         print "couldn't read model: ", s
 596                 from Tools.HardwareInfo import HardwareInfo
 597                 for physdevprefix, pdescription in DEVICEDB.get(HardwareInfo().device_name,{}).items():
 598                         if phys.startswith(physdevprefix):
 599                                 description = pdescription
 600
 601                 # not wholedisk and not partition 1
 602                 if part and part != 1:
 603                         description += " (Partition %d)" % part
 604                 return description
 605
 606         def addMountedPartition(self, device, desc):
 607                 already_mounted = False
 608                 for x in self.partitions[:]:
 609                         if x.mountpoint == device:
 610                                 already_mounted = True
 611                 if not already_mounted:
 612                         self.partitions.append(Partition(mountpoint = device, description = desc))
 613
 614         def removeMountedPartition(self, mountpoint):
 615                 for x in self.partitions[:]:
 616                         if x.mountpoint == mountpoint:
 617                                 self.partitions.remove(x)
 618                                 self.on_partition_list_change("remove", x)
 619
 620 harddiskmanager = HarddiskManager()