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