fix broken code when a hotplug partition was removed
[enigma2.git] / lib / python / Components / Harddisk.py
old mode 100644 (file)
new mode 100755 (executable)
index d739e98..ad6c1a3
@@ -2,7 +2,8 @@ from os import system, listdir, statvfs, popen, makedirs, readlink, stat, major,
 from Tools.Directories import SCOPE_HDD, resolveFilename
 from Tools.CList import CList
 from SystemInfo import SystemInfo
-import string
+import time
+from Components.Console import Console
 
 def tryOpen(filename):
        try:
@@ -18,6 +19,9 @@ class Harddisk:
                tmp = procfile.readline().split(':')
                s_major = int(tmp[0])
                s_minor = int(tmp[1])
+               self.max_idle_time = 0
+               self.idle_running = False
+               self.timer = None
                for disc in listdir("/dev/discs"):
                        path = readlink('/dev/discs/'+disc)
                        devidex = '/dev/discs/'+disc+'/'
@@ -28,14 +32,20 @@ class Harddisk:
                                self.devidex = devidex
                                self.devidex2 = devidex2
                                print "new Harddisk", device, '->', self.devidex, '->', self.devidex2
+                               self.startIdle()
                                break
 
        def __lt__(self, ob):
                return self.device < ob.device
 
+       def stop(self):
+               if self.timer:
+                       self.timer.stop()
+                       self.timer.callback.remove(self.runIdle)
+
        def bus(self):
-               ide_cf = self.device.find("hd") == 0 and self.devidex2.find("host0") == -1 # 7025 specific
-               internal = self.device.find("hd") == 0
+               ide_cf = self.device[:2] == "hd" and "host0" not in self.devidex2 # 7025 specific
+               internal = self.device[:2] == "hd"
                if ide_cf:
                        ret = "External (CF)"
                elif internal:
@@ -63,14 +73,14 @@ class Harddisk:
                return "%d.%03d GB" % (cap/1024, cap%1024)
 
        def model(self):
-               if self.device.find("hd") == 0:
+               if self.device[:2] == "hd":
                        procfile = tryOpen("/proc/ide/"+self.device+"/model")
                        if procfile == "":
                                return ""
                        line = procfile.readline()
                        procfile.close()
                        return line.strip()
-               elif self.device.find("sd") == 0:
+               elif self.device[:2] == "sd":
                        procfile = tryOpen("/sys/block/"+self.device+"/device/vendor")
                        if procfile == "":
                                return ""
@@ -93,7 +103,7 @@ class Harddisk:
                        line = procfile.readline()
                        if line == "":
                                break
-                       if line.startswith(self.devidex):
+                       if line.startswith(self.devidex) or line.startswith(self.devidex2):
                                parts = line.strip().split(" ")
                                try:
                                        stat = statvfs(parts[1])
@@ -126,7 +136,7 @@ class Harddisk:
                cmd = "/bin/umount"
 
                for line in procfile:
-                       if line.startswith(self.devidex):
+                       if line.startswith(self.devidex) or line.startswith(self.devidex2):
                                parts = line.split()
                                cmd = ' '.join([cmd, parts[1]])
 
@@ -213,6 +223,69 @@ class Harddisk:
        def getDeviceName(self):
                return self.getDeviceDir() + "disc"
 
+       # the HDD idle poll daemon.
+       # as some harddrives have a buggy standby timer, we are doing this by hand here.
+       # first, we disable the hardware timer. then, we check every now and then if
+       # any access has been made to the disc. If there has been no access over a specifed time,
+       # we set the hdd into standby.
+       def readStats(self):
+               l = open("/sys/block/%s/stat" % self.device).read()
+               (nr_read, _, _, _, nr_write) = l.split()[:5]
+               return int(nr_read), int(nr_write)
+
+       def startIdle(self):
+               self.last_access = time.time()
+               self.last_stat = 0
+               self.is_sleeping = False
+               from enigma import eTimer
+
+               # disable HDD standby timer
+               Console().ePopen(("hdparm", "hdparm", "-S0", (self.devidex + "disc")))
+               self.timer = eTimer()
+               self.timer.callback.append(self.runIdle)
+               self.idle_running = True
+               self.setIdleTime(self.max_idle_time) # kick the idle polling loop
+
+       def runIdle(self):
+               if not self.max_idle_time:
+                       return
+               t = time.time()
+
+               idle_time = t - self.last_access
+
+               stats = self.readStats()
+               print "nr_read", stats[0], "nr_write", stats[1]
+               l = sum(stats)
+               print "sum", l, "prev_sum", self.last_stat
+
+               if l != self.last_stat: # access
+                       print "hdd was accessed since previous check!"
+                       self.last_stat = l
+                       self.last_access = t
+                       idle_time = 0
+                       self.is_sleeping = False
+               else:
+                       print "hdd IDLE!"
+
+               print "[IDLE]", idle_time, self.max_idle_time, self.is_sleeping
+               if idle_time >= self.max_idle_time and not self.is_sleeping:
+                       self.setSleep()
+                       self.is_sleeping = True
+
+       def setSleep(self):
+               Console().ePopen(("hdparm", "hdparm", "-y", (self.devidex + "disc")))
+
+       def setIdleTime(self, idle):
+               self.max_idle_time = idle
+               if self.idle_running:
+                       if not idle:
+                               self.timer.stop()
+                       else:
+                               self.timer.start(idle * 100, False)  # poll 10 times per period.
+
+       def isSleeping(self):
+               return self.is_sleeping
+
 class Partition:
        def __init__(self, mountpoint, device = None, description = "", force_mounted = False):
                self.mountpoint = mountpoint
@@ -252,9 +325,10 @@ class Partition:
 DEVICEDB =  \
        {
                # dm8000:
-               "devices/platform/brcm-ehci.0/usb1/1-1/1-1.1/1-1.1:1.0": "Front USB Slot",
-               "devices/platform/brcm-ehci.0/usb1/1-1/1-1.2/1-1.2:1.0": "Back, upper USB Slot",
-               "devices/platform/brcm-ehci.0/usb1/1-1/1-1.3/1-1.3:1.0": "Back, lower USB Slot",
+               "/devices/platform/brcm-ehci.0/usb1/1-1/1-1.1/1-1.1:1.0": "Front USB Slot",
+               "/devices/platform/brcm-ehci.0/usb1/1-1/1-1.2/1-1.2:1.0": "Back, upper USB Slot",
+               "/devices/platform/brcm-ehci.0/usb1/1-1/1-1.3/1-1.3:1.0": "Back, lower USB Slot",
+               "/devices/platform/brcm-ehci-1.1/usb2/2-1/2-1:1.0/host1/target1:0:0/1:0:0:0": "DVD Drive",
        }
 
 class HarddiskManager:
@@ -283,8 +357,7 @@ class HarddiskManager:
                                        ("/", _("Internal Flash"))
                                ]
                
-               for x in p:
-                       self.partitions.append(Partition(mountpoint = x[0], description = x[1]))
+               self.partitions.extend([ Partition(mountpoint = x[0], description = x[1]) for x in p ])
 
        def getBlockDevInfo(self, blockdev):
                devpath = "/sys/block/" + blockdev
@@ -296,14 +369,14 @@ class HarddiskManager:
                try:
                        removable = bool(int(open(devpath + "/removable").read()))
                        dev = int(open(devpath + "/dev").read().split(':')[0])
-                       if dev in [7, 31]: # loop, mtdblock
+                       if dev in (7, 31): # loop, mtdblock
                                blacklisted = True
                        if blockdev[0:2] == 'sr':
                                is_cdrom = True
                        if blockdev[0:2] == 'hd':
                                try:
                                        media = open("/proc/ide/%s/media" % blockdev).read()
-                                       if media.find("cdrom") != -1:
+                                       if "cdrom" in media:
                                                is_cdrom = True
                                except IOError:
                                        error = True
@@ -352,14 +425,10 @@ class HarddiskManager:
                if not physdev:
                        dev, part = self.splitDeviceName(device)
                        try:
-                               physdev = readlink("/sys/block/" + dev + "/device")[6:]
+                               physdev = readlink("/sys/block/" + dev + "/device")[5:]
                        except OSError:
-                               print "couldn't determine blockdev physdev for device", dev, "try", device, "now"
-                               try:
-                                       physdev = readlink("/sys/block/" + device + "/device")[6:]
-                               except OSError:
-                                       physdev = dev
-                                       print "couldn't determine blockdev physdev for device", device
+                               physdev = dev
+                               print "couldn't determine blockdev physdev for device", device
 
                # device is the device name, without /dev 
                # physdev is the physical device path, which we (might) use to determine the userfriendly name
@@ -371,7 +440,7 @@ class HarddiskManager:
 
                # see if this is a harddrive
                l = len(device)
-               if l and device[l-1] not in string.digits:
+               if l and not device[l-1].isdigit():
                        error, blacklisted, removable, is_cdrom, partitions, medium_found = self.getBlockDevInfo(device)
                        if not blacklisted and not removable and not is_cdrom and medium_found:
                                self.hdd.append(Harddisk(device))
@@ -385,11 +454,11 @@ class HarddiskManager:
                                self.partitions.remove(x)
                                self.on_partition_list_change("remove", x)
                l = len(device)
-               if l and device[l-1] not in string.digits:
-                       idx = 0
+               if l and not device[l-1].isdigit():
                        for hdd in self.hdd:
                                if hdd.device == device:
-                                       del self.hdd[idx]
+                                       hdd.stop()
+                                       self.hdd.remove(hdd)
                                        break
                        SystemInfo["Harddisk"] = len(self.hdd) > 0
 
@@ -423,22 +492,21 @@ class HarddiskManager:
                return [x for x in parts if not x.device or x.device in devs]
 
        def splitDeviceName(self, devname):
-               dev = ""
-               part = ""
-               for i in devname:
-                       if i in string.digits:
-                               part += i
-                       else:
-                               dev += i
+               # 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.
+               dev = devname[:3]
+               part = devname[3:]
+               for p in part:
+                       if not p.isdigit():
+                               return devname, 0
                return dev, part and int(part) or 0
 
        def getUserfriendlyDeviceName(self, dev, phys):
                dev, part = self.splitDeviceName(dev)
                description = "External Storage %s" % dev
                try:
-                       description = open("/sys/" + phys + "/model").read().strip()
+                       description = open("/sys" + phys + "/model").read().strip()
                except IOError, s:
-                       print "couldn't read model (from /sys/" + phys + "/model): ", s
+                       print "couldn't read model: ", s
                for physdevprefix, pdescription in DEVICEDB.items():
                        if phys.startswith(physdevprefix):
                                description = pdescription
@@ -448,4 +516,18 @@ class HarddiskManager:
                        description += " (Partition %d)" % part
                return description
 
+       def addMountedPartition(self, device, desc):
+               already_mounted = False
+               for x in self.partitions[:]:
+                       if x.mountpoint == device:
+                               already_mounted = True
+               if not already_mounted:
+                       self.partitions.append(Partition(mountpoint = device, description = desc))
+               
+       def removeMountedPartition(self, mountpoint):
+               for x in self.partitions[:]:
+                       if x.mountpoint == mountpoint:
+                               self.partitions.remove(x)
+                               self.on_partition_list_change("remove", x)
+
 harddiskmanager = HarddiskManager()