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