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