lib/python/Components/Harddisk.py

   1 from os import system, listdir, statvfs, popen, makedirs, readlink, stat, major, minor
   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 tryOpen(filename):
   9         try:
  10                 procFile = open(filename)
  11         except IOError:
  12                 return ""
  13         return procFile
  14
  15 class Harddisk:
  16         def __init__(self, device):
  17                 self.device = device
  18                 procfile = tryOpen("/sys/block/"+self.device+"/dev")
  19                 tmp = procfile.readline().split(':')
  20                 s_major = int(tmp[0])
  21                 s_minor = int(tmp[1])
  22                 self.max_idle_time = 0
  23                 self.idle_running = False
  24                 self.timer = None
  25                 for disc in listdir("/dev/discs"):
  26                         path = readlink('/dev/discs/'+disc)
  27                         devidex = '/dev/discs/'+disc+'/'
  28                         devidex2 = '/dev'+path[2:]+'/'
  29                         disc = devidex2+'disc'
  30                         ret = stat(disc).st_rdev
  31                         if s_major == major(ret) and s_minor == minor(ret):
  32                                 self.devidex = devidex
  33                                 self.devidex2 = devidex2
  34                                 print "new Harddisk", device, '->', self.devidex, '->', self.devidex2
  35                                 self.startIdle()
  36                                 break
  37
  38         def __lt__(self, ob):
  39                 return self.device < ob.device
  40
  41         def stop(self):
  42                 if self.timer:
  43                         self.timer.stop()
  44                         self.timer.callback.remove(self.runIdle)
  45
  46         def bus(self):
  47                 ide_cf = self.device[:2] == "hd" and "host0" not in self.devidex2 # 7025 specific
  48                 internal = self.device[:2] == "hd"
  49                 if ide_cf:
  50                         ret = "External (CF)"
  51                 elif internal:
  52                         ret = "Internal"
  53                 else:
  54                         ret = "External"
  55                 return ret
  56
  57         def diskSize(self):
  58                 procfile = tryOpen("/sys/block/"+self.device+"/size")
  59                 if procfile == "":
  60                         return 0
  61                 line = procfile.readline()
  62                 procfile.close()
  63                 try:
  64                         cap = int(line)
  65                 except:
  66                         return 0;
  67                 return cap / 1000 * 512 / 1000
  68
  69         def capacity(self):
  70                 cap = self.diskSize()
  71                 if cap == 0:
  72                         return ""
  73                 return "%d.%03d GB" % (cap/1000, cap%1000)
  74
  75         def model(self):
  76                 if self.device[:2] == "hd":
  77                         procfile = tryOpen("/proc/ide/"+self.device+"/model")
  78                         if procfile == "":
  79                                 return ""
  80                         line = procfile.readline()
  81                         procfile.close()
  82                         return line.strip()
  83                 elif self.device[:2] == "sd":
  84                         procfile = tryOpen("/sys/block/"+self.device+"/device/vendor")
  85                         if procfile == "":
  86                                 return ""
  87                         vendor = procfile.readline().strip()
  88                         procfile.close()
  89                         procfile = tryOpen("/sys/block/"+self.device+"/device/model")
  90                         model = procfile.readline().strip()
  91                         return vendor+'('+model+')'
  92                 else:
  93                         assert False, "no hdX or sdX"
  94
  95         def free(self):
  96                 procfile = tryOpen("/proc/mounts")
  97
  98                 if procfile == "":
  99                         return -1
 100
 101                 free = -1
 102                 while 1:
 103                         line = procfile.readline()
 104                         if line == "":
 105                                 break
 106                         if line.startswith(self.devidex) or line.startswith(self.devidex2):
 107                                 parts = line.strip().split(" ")
 108                                 try:
 109                                         stat = statvfs(parts[1])
 110                                 except OSError:
 111                                         continue
 112                                 free = stat.f_bfree/1000 * stat.f_bsize/1000
 113                                 break
 114                 procfile.close()
 115                 return free
 116
 117         def numPartitions(self):
 118                 try:
 119                         idedir = listdir(self.devidex)
 120                 except OSError:
 121                         return -1
 122                 numPart = -1
 123                 for filename in idedir:
 124                         if filename.startswith("disc"):
 125                                 numPart += 1
 126                         if filename.startswith("part"):
 127                                 numPart += 1
 128                 return numPart
 129
 130         def unmount(self):
 131                 procfile = tryOpen("/proc/mounts")
 132
 133                 if procfile == "":
 134                         return -1
 135
 136                 cmd = "/bin/umount"
 137
 138                 for line in procfile:
 139                         if line.startswith(self.devidex) or line.startswith(self.devidex2):
 140                                 parts = line.split()
 141                                 cmd = ' '.join([cmd, parts[1]])
 142
 143                 procfile.close()
 144
 145                 res = system(cmd)
 146                 return (res >> 8)
 147
 148         def createPartition(self):
 149                 cmd = "/sbin/sfdisk -f " + self.devidex + "disc"
 150                 sfdisk = popen(cmd, "w")
 151                 sfdisk.write("0,\n;\n;\n;\ny\n")
 152                 sfdisk.close()
 153                 return 0
 154
 155         def mkfs(self):
 156                 cmd = "/sbin/mkfs.ext3 "
 157                 if self.diskSize() > 4 * 1024:
 158                         cmd += "-T largefile "
 159                 cmd += "-m0 -O dir_index " + self.devidex + "part1"
 160                 res = system(cmd)
 161                 return (res >> 8)
 162
 163         def mount(self):
 164                 res = -1
 165                 #we don't know which type of devicename is used in fstab, try both
 166                 for device in [self.devidex, self.devidex2]:
 167                         cmd = "/bin/mount -t ext3 " + device + "part1"
 168                         res = system(cmd)
 169                         res >>= 8
 170                         if not res:
 171                                 break
 172                 return res
 173
 174         def createMovieFolder(self):
 175                 try:
 176                         makedirs(resolveFilename(SCOPE_HDD))
 177                 except OSError:
 178                         return -1
 179                 return 0
 180
 181         def fsck(self):
 182                 # We autocorrect any failures
 183                 # TODO: we could check if the fs is actually ext3
 184                 cmd = "/sbin/fsck.ext3 -f -p " + self.devidex + "part1"
 185                 res = system(cmd)
 186                 return (res >> 8)
 187
 188         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")]
 189
 190         def initialize(self):
 191                 self.unmount()
 192
 193                 if self.createPartition() != 0:
 194                         return -1
 195
 196                 if self.mkfs() != 0:
 197                         return -2
 198
 199                 if self.mount() != 0:
 200                         return -3
 201
 202                 if self.createMovieFolder() != 0:
 203                         return -4
 204
 205                 return 0
 206
 207         def check(self):
 208                 self.unmount()
 209
 210                 res = self.fsck()
 211                 if res & 2 == 2:
 212                         return -6
 213
 214                 if res & 4 == 4:
 215                         return -7
 216
 217                 if res != 0 and res != 1:
 218                         # A sum containing 1 will also include a failure
 219                         return -5
 220
 221                 if self.mount() != 0:
 222                         return -3
 223
 224                 return 0
 225
 226         def getDeviceDir(self):
 227                 return self.devidex
 228
 229         def getDeviceName(self):
 230                 return self.getDeviceDir() + "disc"
 231
 232         # the HDD idle poll daemon.
 233         # as some harddrives have a buggy standby timer, we are doing this by hand here.
 234         # first, we disable the hardware timer. then, we check every now and then if
 235         # any access has been made to the disc. If there has been no access over a specifed time,
 236         # we set the hdd into standby.
 237         def readStats(self):
 238                 l = open("/sys/block/%s/stat" % self.device).read()
 239                 (nr_read, _, _, _, nr_write) = l.split()[:5]
 240                 return int(nr_read), int(nr_write)
 241
 242         def startIdle(self):
 243                 self.last_access = time.time()
 244                 self.last_stat = 0
 245                 self.is_sleeping = False
 246                 from enigma import eTimer
 247
 248                 # disable HDD standby timer
 249                 Console().ePopen(("hdparm", "hdparm", "-S0", (self.devidex + "disc")))
 250                 self.timer = eTimer()
 251                 self.timer.callback.append(self.runIdle)
 252                 self.idle_running = True
 253                 self.setIdleTime(self.max_idle_time) # kick the idle polling loop
 254
 255         def runIdle(self):
 256                 if not self.max_idle_time:
 257                         return
 258                 t = time.time()
 259
 260                 idle_time = t - self.last_access
 261
 262                 stats = self.readStats()
 263                 print "nr_read", stats[0], "nr_write", stats[1]
 264                 l = sum(stats)
 265                 print "sum", l, "prev_sum", self.last_stat
 266
 267                 if l != self.last_stat: # access
 268                         print "hdd was accessed since previous check!"
 269                         self.last_stat = l
 270                         self.last_access = t
 271                         idle_time = 0
 272                         self.is_sleeping = False
 273                 else:
 274                         print "hdd IDLE!"
 275
 276                 print "[IDLE]", idle_time, self.max_idle_time, self.is_sleeping
 277                 if idle_time >= self.max_idle_time and not self.is_sleeping:
 278                         self.setSleep()
 279                         self.is_sleeping = True
 280
 281         def setSleep(self):
 282                 Console().ePopen(("hdparm", "hdparm", "-y", (self.devidex + "disc")))
 283
 284         def setIdleTime(self, idle):
 285                 self.max_idle_time = idle
 286                 if self.idle_running:
 287                         if not idle:
 288                                 self.timer.stop()
 289                         else:
 290                                 self.timer.start(idle * 100, False)  # poll 10 times per period.
 291
 292         def isSleeping(self):
 293                 return self.is_sleeping
 294
 295 class Partition:
 296         def __init__(self, mountpoint, device = None, description = "", force_mounted = False):
 297                 self.mountpoint = mountpoint
 298                 self.description = description
 299                 self.force_mounted = force_mounted
 300                 self.is_hotplug = force_mounted # so far; this might change.
 301                 self.device = device
 302
 303         def stat(self):
 304                 return statvfs(self.mountpoint)
 305
 306         def free(self):
 307                 try:
 308                         s = self.stat()
 309                         return s.f_bavail * s.f_bsize
 310                 except OSError:
 311                         return None
 312
 313         def total(self):
 314                 try:
 315                         s = self.stat()
 316                         return s.f_blocks * s.f_bsize
 317                 except OSError:
 318                         return None
 319
 320         def mounted(self):
 321                 # THANK YOU PYTHON FOR STRIPPING AWAY f_fsid.
 322                 # TODO: can os.path.ismount be used?
 323                 if self.force_mounted:
 324                         return True
 325                 procfile = tryOpen("/proc/mounts")
 326                 for n in procfile.readlines():
 327                         if n.split(' ')[1] == self.mountpoint:
 328                                 return True
 329                 return False
 330
 331 DEVICEDB =  \
 332         {
 333                 # dm8000:
 334                 "/devices/platform/brcm-ehci.0/usb1/1-1/1-1.1/1-1.1:1.0": "Front USB Slot",
 335                 "/devices/platform/brcm-ehci.0/usb1/1-1/1-1.2/1-1.2:1.0": "Back, upper USB Slot",
 336                 "/devices/platform/brcm-ehci.0/usb1/1-1/1-1.3/1-1.3:1.0": "Back, lower USB Slot",
 337                 "/devices/platform/brcm-ehci-1.1/usb2/2-1/2-1:1.0/host1/target1:0:0/1:0:0:0": "DVD Drive",
 338         }
 339
 340 class HarddiskManager:
 341         def __init__(self):
 342                 self.hdd = [ ]
 343                 self.cd = ""
 344                 self.partitions = [ ]
 345
 346                 self.on_partition_list_change = CList()
 347
 348                 self.enumerateBlockDevices()
 349
 350                 # currently, this is just an enumeration of what's possible,
 351                 # this probably has to be changed to support automount stuff.
 352                 # still, if stuff is mounted into the correct mountpoints by
 353                 # external tools, everything is fine (until somebody inserts
 354                 # a second usb stick.)
 355                 p = [
 356                                         ("/media/hdd", _("Harddisk")),
 357                                         ("/media/card", _("Card")),
 358                                         ("/media/cf", _("Compact Flash")),
 359                                         ("/media/mmc1", _("MMC Card")),
 360                                         ("/media/net", _("Network Mount")),
 361                                         ("/media/ram", _("Ram Disk")),
 362                                         ("/media/usb", _("USB Stick")),
 363                                         ("/", _("Internal Flash"))
 364                                 ]
 365
 366                 self.partitions.extend([ Partition(mountpoint = x[0], description = x[1]) for x in p ])
 367
 368         def getBlockDevInfo(self, blockdev):
 369                 devpath = "/sys/block/" + blockdev
 370                 error = False
 371                 removable = False
 372                 blacklisted = False
 373                 is_cdrom = False
 374                 partitions = []
 375                 try:
 376                         removable = bool(int(open(devpath + "/removable").read()))
 377                         dev = int(open(devpath + "/dev").read().split(':')[0])
 378                         if dev in (7, 31): # loop, mtdblock
 379                                 blacklisted = True
 380                         if blockdev[0:2] == 'sr':
 381                                 is_cdrom = True
 382                         if blockdev[0:2] == 'hd':
 383                                 try:
 384                                         media = open("/proc/ide/%s/media" % blockdev).read()
 385                                         if "cdrom" in media:
 386                                                 is_cdrom = True
 387                                 except IOError:
 388                                         error = True
 389                         # check for partitions
 390                         if not is_cdrom:
 391                                 for partition in listdir(devpath):
 392                                         if partition[0:len(blockdev)] != blockdev:
 393                                                 continue
 394                                         partitions.append(partition)
 395                         else:
 396                                 self.cd = blockdev
 397                 except IOError:
 398                         error = True
 399                 # check for medium
 400                 medium_found = True
 401                 try:
 402                         open("/dev/" + blockdev).close()
 403                 except IOError, err:
 404                         if err.errno == 159: # no medium present
 405                                 medium_found = False
 406
 407                 return error, blacklisted, removable, is_cdrom, partitions, medium_found
 408
 409         def enumerateBlockDevices(self):
 410                 print "enumerating block devices..."
 411                 for blockdev in listdir("/sys/block"):
 412                         error, blacklisted, removable, is_cdrom, partitions, medium_found = self.getBlockDevInfo(blockdev)
 413                         print "found block device '%s':" % blockdev,
 414                         if error:
 415                                 print "error querying properties"
 416                         elif blacklisted:
 417                                 print "blacklisted"
 418                         elif not medium_found:
 419                                 print "no medium"
 420                         else:
 421                                 print "ok, removable=%s, cdrom=%s, partitions=%s, device=%s" % (removable, is_cdrom, partitions, blockdev)
 422
 423                                 self.addHotplugPartition(blockdev)
 424                                 for part in partitions:
 425                                         self.addHotplugPartition(part)
 426
 427         def getAutofsMountpoint(self, device):
 428                 return "/autofs/%s/" % (device)
 429
 430         def addHotplugPartition(self, device, physdev = None):
 431                 if not physdev:
 432                         dev, part = self.splitDeviceName(device)
 433                         try:
 434                                 physdev = readlink("/sys/block/" + dev + "/device")[5:]
 435                         except OSError:
 436                                 physdev = dev
 437                                 print "couldn't determine blockdev physdev for device", device
 438
 439                 # device is the device name, without /dev
 440                 # physdev is the physical device path, which we (might) use to determine the userfriendly name
 441                 description = self.getUserfriendlyDeviceName(device, physdev)
 442
 443                 p = Partition(mountpoint = self.getAutofsMountpoint(device), description = description, force_mounted = True, device = device)
 444                 self.partitions.append(p)
 445                 self.on_partition_list_change("add", p)
 446
 447                 # see if this is a harddrive
 448                 l = len(device)
 449                 if l and not device[l-1].isdigit():
 450                         error, blacklisted, removable, is_cdrom, partitions, medium_found = self.getBlockDevInfo(device)
 451                         if not blacklisted and not removable and not is_cdrom and medium_found:
 452                                 self.hdd.append(Harddisk(device))
 453                                 self.hdd.sort()
 454                                 SystemInfo["Harddisk"] = len(self.hdd) > 0
 455
 456         def removeHotplugPartition(self, device):
 457                 mountpoint = self.getAutofsMountpoint(device)
 458                 for x in self.partitions[:]:
 459                         if x.mountpoint == mountpoint:
 460                                 self.partitions.remove(x)
 461                                 self.on_partition_list_change("remove", x)
 462                 l = len(device)
 463                 if l and not device[l-1].isdigit():
 464                         for hdd in self.hdd:
 465                                 if hdd.device == device:
 466                                         hdd.stop()
 467                                         self.hdd.remove(hdd)
 468                                         break
 469                         SystemInfo["Harddisk"] = len(self.hdd) > 0
 470
 471         def HDDCount(self):
 472                 return len(self.hdd)
 473
 474         def HDDList(self):
 475                 list = [ ]
 476                 for hd in self.hdd:
 477                         hdd = hd.model() + " - " + hd.bus()
 478                         cap = hd.capacity()
 479                         if cap != "":
 480                                 hdd += " (" + cap + ")"
 481                         list.append((hdd, hd))
 482                 return list
 483
 484         def getCD(self):
 485                 return self.cd
 486
 487         def getMountedPartitions(self, onlyhotplug = False):
 488                 parts = [x for x in self.partitions if (x.is_hotplug or not onlyhotplug) and x.mounted()]
 489                 devs = set([x.device for x in parts])
 490                 for devname in devs.copy():
 491                         if not devname:
 492                                 continue
 493                         dev, part = self.splitDeviceName(devname)
 494                         if part and dev in devs: # if this is a partition and we still have the wholedisk, remove wholedisk
 495                                 devs.remove(dev)
 496
 497                 # return all devices which are not removed due to being a wholedisk when a partition exists
 498                 return [x for x in parts if not x.device or x.device in devs]
 499
 500         def splitDeviceName(self, devname):
 501                 # 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.
 502                 dev = devname[:3]
 503                 part = devname[3:]
 504                 for p in part:
 505                         if not p.isdigit():
 506                                 return devname, 0
 507                 return dev, part and int(part) or 0
 508
 509         def getUserfriendlyDeviceName(self, dev, phys):
 510                 dev, part = self.splitDeviceName(dev)
 511                 description = "External Storage %s" % dev
 512                 try:
 513                         description = open("/sys" + phys + "/model").read().strip()
 514                 except IOError, s:
 515                         print "couldn't read model: ", s
 516                 for physdevprefix, pdescription in DEVICEDB.items():
 517                         if phys.startswith(physdevprefix):
 518                                 description = pdescription
 519
 520                 # not wholedisk and not partition 1
 521                 if part and part != 1:
 522                         description += " (Partition %d)" % part
 523                 return description
 524
 525         def addMountedPartition(self, device, desc):
 526                 already_mounted = False
 527                 for x in self.partitions[:]:
 528                         if x.mountpoint == device:
 529                                 already_mounted = True
 530                 if not already_mounted:
 531                         self.partitions.append(Partition(mountpoint = device, description = desc))
 532
 533         def removeMountedPartition(self, mountpoint):
 534                 for x in self.partitions[:]:
 535                         if x.mountpoint == mountpoint:
 536                                 self.partitions.remove(x)
 537                                 self.on_partition_list_change("remove", x)
 538
 539 harddiskmanager = HarddiskManager()