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/1024, cap%1024)
  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 " + self.devidex + "part1"
 160                 res = system(cmd)
 161                 return (res >> 8)
 162
 163         def mount(self):
 164                 cmd = "/bin/mount -t ext3 " + self.devidex + "part1"
 165                 res = system(cmd)
 166                 return (res >> 8)
 167
 168         def createMovieFolder(self):
 169                 try:
 170                         makedirs(resolveFilename(SCOPE_HDD))
 171                 except OSError:
 172                         return -1
 173                 return 0
 174
 175         def fsck(self):
 176                 # We autocorrect any failures
 177                 # TODO: we could check if the fs is actually ext3
 178                 cmd = "/sbin/fsck.ext3 -f -p " + self.devidex + "part1"
 179                 res = system(cmd)
 180                 return (res >> 8)
 181
 182         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")]
 183
 184         def initialize(self):
 185                 self.unmount()
 186
 187                 if self.createPartition() != 0:
 188                         return -1
 189
 190                 if self.mkfs() != 0:
 191                         return -2
 192
 193                 if self.mount() != 0:
 194                         return -3
 195
 196                 if self.createMovieFolder() != 0:
 197                         return -4
 198
 199                 return 0
 200
 201         def check(self):
 202                 self.unmount()
 203
 204                 res = self.fsck()
 205                 if res & 2 == 2:
 206                         return -6
 207
 208                 if res & 4 == 4:
 209                         return -7
 210
 211                 if res != 0 and res != 1:
 212                         # A sum containing 1 will also include a failure
 213                         return -5
 214
 215                 if self.mount() != 0:
 216                         return -3
 217
 218                 return 0
 219
 220         def getDeviceDir(self):
 221                 return self.devidex
 222
 223         def getDeviceName(self):
 224                 return self.getDeviceDir() + "disc"
 225
 226         # the HDD idle poll daemon.
 227         # as some harddrives have a buggy standby timer, we are doing this by hand here.
 228         # first, we disable the hardware timer. then, we check every now and then if
 229         # any access has been made to the disc. If there has been no access over a specifed time,
 230         # we set the hdd into standby.
 231         def readStats(self):
 232                 l = open("/sys/block/%s/stat" % self.device).read()
 233                 nr_read = int(l[:8].strip())
 234                 nr_write = int(l[4*9:4*9+8].strip())
 235                 return nr_read, nr_write
 236
 237         def startIdle(self):
 238                 self.last_access = time.time()
 239                 self.last_stat = 0
 240                 self.is_sleeping = False
 241                 from enigma import eTimer
 242
 243                 # disable HDD standby timer
 244                 Console().ePopen(("hdparm", "hdparm", "-S0", (self.devidex + "disc")))
 245                 self.timer = eTimer()
 246                 self.timer.callback.append(self.runIdle)
 247                 self.idle_running = True
 248                 self.setIdleTime(self.max_idle_time) # kick the idle polling loop
 249
 250         def runIdle(self):
 251                 if not self.max_idle_time:
 252                         return
 253                 t = time.time()
 254
 255                 idle_time = t - self.last_access
 256
 257                 stats = self.readStats()
 258                 print "nr_read", stats[0], "nr_write", stats[1]
 259                 l = sum(stats)
 260                 print "sum", l, "prev_sum", self.last_stat
 261
 262                 if l != self.last_stat: # access
 263                         print "hdd was accessed since previous check!"
 264                         self.last_stat = l
 265                         self.last_access = t
 266                         idle_time = 0
 267                         self.is_sleeping = False
 268                 else:
 269                         print "hdd IDLE!"
 270
 271                 print "[IDLE]", idle_time, self.max_idle_time, self.is_sleeping
 272                 if idle_time >= self.max_idle_time and not self.is_sleeping:
 273                         self.setSleep()
 274                         self.is_sleeping = True
 275
 276         def setSleep(self):
 277                 Console().ePopen(("hdparm", "hdparm", "-y", (self.devidex + "disc")))
 278
 279         def setIdleTime(self, idle):
 280                 self.max_idle_time = idle
 281                 if self.idle_running:
 282                         if not idle:
 283                                 self.timer.stop()
 284                         else:
 285                                 self.timer.start(idle * 100, False)  # poll 10 times per period.
 286
 287         def isSleeping(self):
 288                 return self.is_sleeping
 289
 290 class Partition:
 291         def __init__(self, mountpoint, device = None, description = "", force_mounted = False):
 292                 self.mountpoint = mountpoint
 293                 self.description = description
 294                 self.force_mounted = force_mounted
 295                 self.is_hotplug = force_mounted # so far; this might change.
 296                 self.device = device
 297
 298         def stat(self):
 299                 return statvfs(self.mountpoint)
 300
 301         def free(self):
 302                 try:
 303                         s = self.stat()
 304                         return s.f_bavail * s.f_bsize
 305                 except OSError:
 306                         return None
 307
 308         def total(self):
 309                 try:
 310                         s = self.stat()
 311                         return s.f_blocks * s.f_bsize
 312                 except OSError:
 313                         return None
 314
 315         def mounted(self):
 316                 # THANK YOU PYTHON FOR STRIPPING AWAY f_fsid.
 317                 # TODO: can os.path.ismount be used?
 318                 if self.force_mounted:
 319                         return True
 320                 procfile = tryOpen("/proc/mounts")
 321                 for n in procfile.readlines():
 322                         if n.split(' ')[1] == self.mountpoint:
 323                                 return True
 324                 return False
 325
 326 DEVICEDB =  \
 327         {
 328                 # dm8000:
 329                 "/devices/platform/brcm-ehci.0/usb1/1-1/1-1.1/1-1.1:1.0": "Front USB Slot",
 330                 "/devices/platform/brcm-ehci.0/usb1/1-1/1-1.2/1-1.2:1.0": "Back, upper USB Slot",
 331                 "/devices/platform/brcm-ehci.0/usb1/1-1/1-1.3/1-1.3:1.0": "Back, lower USB Slot",
 332                 "/devices/platform/brcm-ehci-1.1/usb2/2-1/2-1:1.0/host1/target1:0:0/1:0:0:0": "DVD Drive",
 333         }
 334
 335 class HarddiskManager:
 336         def __init__(self):
 337                 self.hdd = [ ]
 338                 self.cd = ""
 339                 self.partitions = [ ]
 340
 341                 self.on_partition_list_change = CList()
 342
 343                 self.enumerateBlockDevices()
 344
 345                 # currently, this is just an enumeration of what's possible,
 346                 # this probably has to be changed to support automount stuff.
 347                 # still, if stuff is mounted into the correct mountpoints by
 348                 # external tools, everything is fine (until somebody inserts
 349                 # a second usb stick.)
 350                 p = [
 351                                         ("/media/hdd", _("Harddisk")),
 352                                         ("/media/card", _("Card")),
 353                                         ("/media/cf", _("Compact Flash")),
 354                                         ("/media/mmc1", _("MMC Card")),
 355                                         ("/media/net", _("Network Mount")),
 356                                         ("/media/ram", _("Ram Disk")),
 357                                         ("/media/usb", _("USB Stick")),
 358                                         ("/", _("Internal Flash"))
 359                                 ]
 360
 361                 self.partitions.extend([ Partition(mountpoint = x[0], description = x[1]) for x in p ])
 362
 363         def getBlockDevInfo(self, blockdev):
 364                 devpath = "/sys/block/" + blockdev
 365                 error = False
 366                 removable = False
 367                 blacklisted = False
 368                 is_cdrom = False
 369                 partitions = []
 370                 try:
 371                         removable = bool(int(open(devpath + "/removable").read()))
 372                         dev = int(open(devpath + "/dev").read().split(':')[0])
 373                         if dev in (7, 31): # loop, mtdblock
 374                                 blacklisted = True
 375                         if blockdev[0:2] == 'sr':
 376                                 is_cdrom = True
 377                         if blockdev[0:2] == 'hd':
 378                                 try:
 379                                         media = open("/proc/ide/%s/media" % blockdev).read()
 380                                         if "cdrom" in media:
 381                                                 is_cdrom = True
 382                                 except IOError:
 383                                         error = True
 384                         # check for partitions
 385                         if not is_cdrom:
 386                                 for partition in listdir(devpath):
 387                                         if partition[0:len(blockdev)] != blockdev:
 388                                                 continue
 389                                         partitions.append(partition)
 390                         else:
 391                                 self.cd = blockdev
 392                 except IOError:
 393                         error = True
 394                 # check for medium
 395                 medium_found = True
 396                 try:
 397                         open("/dev/" + blockdev).close()
 398                 except IOError, err:
 399                         if err.errno == 159: # no medium present
 400                                 medium_found = False
 401
 402                 return error, blacklisted, removable, is_cdrom, partitions, medium_found
 403
 404         def enumerateBlockDevices(self):
 405                 print "enumerating block devices..."
 406                 for blockdev in listdir("/sys/block"):
 407                         error, blacklisted, removable, is_cdrom, partitions, medium_found = self.getBlockDevInfo(blockdev)
 408                         print "found block device '%s':" % blockdev,
 409                         if error:
 410                                 print "error querying properties"
 411                         elif blacklisted:
 412                                 print "blacklisted"
 413                         elif not medium_found:
 414                                 print "no medium"
 415                         else:
 416                                 print "ok, removable=%s, cdrom=%s, partitions=%s, device=%s" % (removable, is_cdrom, partitions, blockdev)
 417
 418                                 self.addHotplugPartition(blockdev)
 419                                 for part in partitions:
 420                                         self.addHotplugPartition(part)
 421
 422         def getAutofsMountpoint(self, device):
 423                 return "/autofs/%s/" % (device)
 424
 425         def addHotplugPartition(self, device, physdev = None):
 426                 if not physdev:
 427                         dev, part = self.splitDeviceName(device)
 428                         try:
 429                                 physdev = readlink("/sys/block/" + dev + "/device")[5:]
 430                         except OSError:
 431                                 physdev = dev
 432                                 print "couldn't determine blockdev physdev for device", device
 433
 434                 # device is the device name, without /dev
 435                 # physdev is the physical device path, which we (might) use to determine the userfriendly name
 436                 description = self.getUserfriendlyDeviceName(device, physdev)
 437
 438                 p = Partition(mountpoint = self.getAutofsMountpoint(device), description = description, force_mounted = True, device = device)
 439                 self.partitions.append(p)
 440                 self.on_partition_list_change("add", p)
 441
 442                 # see if this is a harddrive
 443                 l = len(device)
 444                 if l and not device[l-1].isdigit():
 445                         error, blacklisted, removable, is_cdrom, partitions, medium_found = self.getBlockDevInfo(device)
 446                         if not blacklisted and not removable and not is_cdrom and medium_found:
 447                                 self.hdd.append(Harddisk(device))
 448                                 self.hdd.sort()
 449                                 SystemInfo["Harddisk"] = len(self.hdd) > 0
 450
 451         def removeHotplugPartition(self, device):
 452                 mountpoint = self.getAutofsMountpoint(device)
 453                 for x in self.partitions[:]:
 454                         if x.mountpoint == mountpoint:
 455                                 self.partitions.remove(x)
 456                                 self.on_partition_list_change("remove", x)
 457                 l = len(device)
 458                 if l and not device[l-1].isdigit():
 459                         idx = 0
 460                         for hdd in self.hdd:
 461                                 if hdd.device == device:
 462                                         self.hdd[x].stop()
 463                                         del self.hdd[idx]
 464                                         break
 465                         SystemInfo["Harddisk"] = len(self.hdd) > 0
 466
 467         def HDDCount(self):
 468                 return len(self.hdd)
 469
 470         def HDDList(self):
 471                 list = [ ]
 472                 for hd in self.hdd:
 473                         hdd = hd.model() + " - " + hd.bus()
 474                         cap = hd.capacity()
 475                         if cap != "":
 476                                 hdd += " (" + cap + ")"
 477                         list.append((hdd, hd))
 478                 return list
 479
 480         def getCD(self):
 481                 return self.cd
 482
 483         def getMountedPartitions(self, onlyhotplug = False):
 484                 parts = [x for x in self.partitions if (x.is_hotplug or not onlyhotplug) and x.mounted()]
 485                 devs = set([x.device for x in parts])
 486                 for devname in devs.copy():
 487                         if not devname:
 488                                 continue
 489                         dev, part = self.splitDeviceName(devname)
 490                         if part and dev in devs: # if this is a partition and we still have the wholedisk, remove wholedisk
 491                                 devs.remove(dev)
 492
 493                 # return all devices which are not removed due to being a wholedisk when a partition exists
 494                 return [x for x in parts if not x.device or x.device in devs]
 495
 496         def splitDeviceName(self, devname):
 497                 # 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.
 498                 dev = devname[:3]
 499                 part = devname[3:]
 500                 for p in part:
 501                         if not p.isdigit():
 502                                 return devname, 0
 503                 return dev, part and int(part) or 0
 504
 505         def getUserfriendlyDeviceName(self, dev, phys):
 506                 dev, part = self.splitDeviceName(dev)
 507                 description = "External Storage %s" % dev
 508                 try:
 509                         description = open("/sys" + phys + "/model").read().strip()
 510                 except IOError, s:
 511                         print "couldn't read model: ", s
 512                 for physdevprefix, pdescription in DEVICEDB.items():
 513                         if phys.startswith(physdevprefix):
 514                                 description = pdescription
 515
 516                 # not wholedisk and not partition 1
 517                 if part and part != 1:
 518                         description += " (Partition %d)" % part
 519                 return description
 520
 521         def addMountedPartition(self, device, desc):
 522                 already_mounted = False
 523                 for x in self.partitions[:]:
 524                         if x.mountpoint == device:
 525                                 already_mounted = True
 526                 if not already_mounted:
 527                         self.partitions.append(Partition(mountpoint = device, description = desc))
 528
 529         def removeMountedPartition(self, mountpoint):
 530                 for x in self.partitions[:]:
 531                         if x.mountpoint == mountpoint:
 532                                 self.partitions.remove(x)
 533                                 self.on_partition_list_change("remove", x)
 534
 535 harddiskmanager = HarddiskManager()