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Drobo.py
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"""
The Drobo module is used to get configuration data
from a Data Robotics Inc. "Drobo" storage unit.
The ways of querying the unit are derived mostly from:
DROBO Management Protocol Specification Rev. A.0 03/08
referred herein as 'DMP Spec'. Another source of data was the
droboprotocoldefs.h file (referred to as dmp.h). The last source
of information is what the device actually does. Many inconsistencies
were identified. ERRATA is used to identify when a conflict was apparent.
tested with firmware: 1.0.3 and later...
( Drobo is a trademark of Data Robotics Inc. )
copyright:
Drobo Utils Copyright (C) 2008,2009 Peter Silva ([email protected])
Drobo Utils comes with ABSOLUTELY NO WARRANTY; For details type see the file
named COPYING in the root of the source directory tree.
"""
import fcntl, struct, socket, array, subprocess, time
import exceptions
import os, sys, re
import types
#only for fw download...
import os.path
import urllib.request, urllib.error, urllib.parse
import zipfile,zlib
#only for simulation mode...
import random
# maximum transaction ID before wrapping...
MAX_TRANSACTION = 250
# obviously need to update this with every release.
VERSION = '9999'
# set to non-zero to increase verbosity of library functions.
DEBUG = 0
# It's a bit field,
DBG_Chatty = 0x01
DBG_HWDialog = 0x02
DBG_Instantiation= 0x04
DBG_RawReturn = 0x08
DBG_Detection = 0x10
DBG_General = 0x20
# This isn't entirely simulation mode. It is to aid development
# when no drobo is available. You can format random disks, including
# non-drobos. So do not activate unless you read what the code does first.
# in simulation mode, can run non-root, best for GUI work.
DBG_Simulation = 0x80
#for generic SCSI IO details...
import DroboIOctl
class DroboException(exceptions.Exception):
""" If there is a problem accessing the Drobo, this exception is raised.
"""
def __init__(self, msg="Unknown"):
self.msg = msg
def __str__(self):
print("Problem accessing a Drobo: " + self.msg)
def _ledstatus(n):
""" return colors decoded, given numeric slot status
goal: match what the lights are doing on the unit.
STATUS: working with ERRATA:
Developer Notes:
The spec says: status is high order 3 bits, and starting from 0, goes:
green, yellow, Red, ( Green Yellow )
dmp.h says:
forget the high order 3 bits, it's the whole byte.
off is supposed to be 0, but doesn't match when flashing red green..
off, red, yellow, green, yellow-green, red-green, red-off, red-yellow
my drobo says:
high order bits always 0. status seems to use whole byte.
green is 3,
flashing red-green is 4... which dmp.h says is yellow green
flashing red-black is 6... agrees with dmp.h
0x80 is indeed an empty slot, as per dmp.h
unknown-- yellow-green...
matches neither... hmm...
"""
colourstats=[ 'black', 'red', 'yellow', 'green', ['red', 'green'],
[ 'red', 'yellow' ], ['red', 'black'] ]
if DEBUG & DBG_General:
print('colourstats, argument n is: ', n)
if ( n == 0x80 ): # empty
return 'gray'
return colourstats[n & 0x0f ]
def _unitstatus(n):
""" return string, given numeric unit status
STATUS: working with ERRATA:
here is what the spec says should work (integers...):
ust = [ 'Normal', 'Red Threshold Exceeded', 'Yellow Threshold Exceeded',
'No Disks', 'Bad Disk', 'Multiple Disks Removed', 'No Redundancy',
'No Magic Hotspare', 'Unit Full', 'Relay Out in Progress',
'Format in Progress' ]
return ust[n]
the .h files says... no stupid... it's bit fields. I don't much care
as long as folks make up their mind. I have a higher regard for the .h
so that implementation is active.
"""
f = []
if ( n & 0x0002 ):
f.append( 'Red alert' )
if ( n & 0x0004 ):
f.append( 'Yellow alert' )
if ( n & 0x0008 ):
f.append( 'No disks' )
if ( n & 0x0010 ):
f.append( 'Bad disk' )
if ( n & 0x0020 ):
f.append( 'Too many missing disks' )
if ( n & 0x0040 ):
f.append( 'No redundancy' )
if ( n & 0x0080 ):
f.append( 'No magic hotspare' )
if ( n & 0x0100 ):
f.append( 'no space left' )
if ( n & 0x0200 ):
f.append( 'Relay out in progress' )
if ( n & 0x0400 ):
f.append( 'Format in progress' )
if ( n & 0x0800 ):
f.append( 'Mismatched disks' )
if ( n & 0x1000 ):
f.append( 'Unknown version' )
if ( n & 0x2000 ):
f.append( 'New firmware installed' )
if ( n & 0x4000 ):
f.append( 'New LUN available after reboot' )
if ( n & 0x10000000):# was going to say 'Let us pray...', but no need to alarm people.
f.append( 'Unknown error' )
return f
def _partformat(n):
""" return Drobo's idea of what the partition type is
STATUS: working
worrisome... when multiple partitions present of different types, the
bit field is set to: NO FORMAT.
"""
f = []
if ( n & 0x01 ):
f.append( 'NO FORMAT' )
if ( n & 0x02 ):
f.append( 'NTFS' )
if ( n & 0x04 ):
f.append( 'HFS' )
if ( n & 0x80 ): # on Peter's...
f.append( 'EXT3' )
if ( n & 0x08 ): # on Matthew Mastracci's
f.append( 'EXT3' )
if ( n & 0xFF ) == 0:
f.append( 'FAT32' )
if (len(f) != 1):
print('hoho! multiple partition types! Brave are we not?')
return f
def _partscheme(n):
""" return what drobo thinks the partition scheme is
STATUS: working, no issues.
Have set all of them on my drobo using parted, was detected correctly.
"""
if (n == 0):
return "No Partitions"
if (n == 1):
return "MBR"
if (n == 2):
return "APM"
if (n == 3):
return "GPT"
def _unitfeatures(norig):
""" return a list of features supported by a unit
STATUS: working.
this comes straight from dmp.h.. what they mean isn't documented.
stuff that looks wrong:
-- USED_CAPACITY... should be USE_CAPACITY ... no 'D'
-- all the 'SUPPORTS' texts are redundant. every bit is about
what is supported. It should be just LUNINFO2
etc...
feature x0800 and 0x2000 show up on my Drobo v1 running 1.3.0...
of course, do not know what they are...
"""
n=norig
feature_map = [
( 0x0001, 'NO_AUTO_REBOOT' ),
( 0x0002, 'NO_FAT32_FORMAT' ),
( 0x0004, 'USED_CAPACITY_FROM_HOST' ),
( 0x0008, 'DISKPACKSTATUS' ),
( 0x0010, 'ENCRYPT_NOHEADER' ),
( 0x0020, 'CMD_STATUS_QUERIABLE' ),
( 0x0040, 'VARIABLE_LUN_SIZE_1_16' ),
( 0x0080, 'PARTITION_LUN_GPT_MBR' ),
( 0x0100, 'FAT32_FORMAT_VOLNAME' ),
( 0x0200, 'SUPPORTS_DROBOSHARE' ),
( 0x0400, 'SUPPORTS_NEW_LUNINFO2' ),
( 0x0800, 'feature x0800' ),
( 0x1000, 'LUN_MANAGEMENT' ),
( 0x2000, 'feature x2000' ),
( 0x4000, 'SUPPORTS_OPTIONS2' ),
( 0x8000, 'SUPPORTS_SHUTDOWN' ),
( 0x10000, 'feature x10000' ),
( 0x20000, 'SUPPORTS_ISCSI' ),
( 0x40000, 'feature x40000' ),
( 0x80000, 'feature x80000' ),
( 0x40000000, 'SUPPORTS_VOLUME_RENAME' ),
( 0x80000000, 'SUPPORTS_SINGLE_LUN_FORMAT' )]
f = []
for feature in feature_map:
#print "checking for %s %04x in %04x: " % ( feature[1], feature[0], n )
if n & feature[0] :
n = n & ~ feature[0]
f.append( feature[1] )
if n != 0:
f.append( "leftovers (0x%04x)" % n )
return f
class Drobo:
"""
Drobo the class for data exchange with the storage units.
briefly, communicates using SCSI sub_page blocks.
There are member functions for each page type...
See the DMP Spec for details.
All capacity returned are in bytes.
the rest of this comment is destined only for Drobo.py developers, not users:
DMP Spec ERRATA, by subpage:
- in config, last Q is capacity, manual says bytes, sample code
says *512, which works better... so actual quantity is 512 byte blocks.
- in slotinfo,
'managed capacity' is always 0, is that OK?
- in version, seems to want an extra byte. BB fails, but BBB works... returns
- in settings, the 32 byte name starts with a null byte before
'TRUSTED DATA', is that normal?
"""
def __init__(self,chardevs,debugflags=0):
""" chardev is /dev/sdX...
the character device associated with the drobo unit
"""
global DEBUG
DEBUG=debugflags
if DEBUG & DBG_Instantiation :
print('__init__ ')
self.fd=None
if type(chardevs) is list:
self.char_dev_file = chardevs[0]
self.char_devs = chardevs
else:
self.char_dev_file = chardevs
self.char_devs = [ chardevs ]
self.features = []
self.transactionID=random.randint(1,MAX_TRANSACTION)
self.relaystart=0
if DEBUG & DBG_Simulation:
self.GetSubPageFirmware() \
#for the side effect, self.fw & self.features get set
else:
self.fd=DroboIOctl.DroboIOctl(self.char_dev_file,0,debugflags)
if self.fd == None :
raise DroboException
# more thorough checks for Drobohood...
# for some reason under ubuntu intrepid, start getting responses of all bits set.
# need some ways to spot a real drobo.
cfg = self.GetSubPageConfig()
#Side effect: Config, sets self.slot_count...
self.inquiry=self.inquire()
if DEBUG & DBG_Detection:
print("cfg: ", cfg)
if ( len(cfg) != 3 ): # We ask this page to return three fields...
if DEBUG & DBG_Detection:
print("%s length of cfg is: %d, should be 3" % (self.char_dev_file, len(cfg)))
raise DroboException
if ( self.slot_count < 4 ):
if DEBUG & DBG_Detection:
print("%s cfg[0] = %s, should >= 4. All Drobos have at least 4 slots" % (self.char_dev_file, cfg[0]))
raise DroboException # Assert: All Drobo have 4 slots.
set=self.GetSubPageSettings()
if DEBUG & DBG_Detection:
print("settings: ", set)
self.GetSubPageFirmware()
if ( len(self.fw) < 8 ) and (len(self.fw[7]) < 5):
if DEBUG & DBG_Detection:
print("%s length of fw query: is %d, should be < 8." % (self.char_dev_file, len(self.fw)))
print("%s len(fw[7]) query: is %d, should be < 5." % (self.char_dev_file, len(self.fw[7])))
raise DroboException
if ( self.fw[6].lower() != 'armmarvell' ):
print("interesting, %s fw[6] is: %s" % (self.char_dev_file,self.fw[6]))
#if ( self.fw[6].lower() != 'armmarvell' ):
# if DEBUG & DBG_Detection:
# print "%s fw[6] is not armmarvell." % self.char_dev_file
# raise DroboException
def __del__(self):
if DEBUG & DBG_Instantiation :
print('__del__ ')
if self.fd != None :
self.fd.closefd()
self.fd=None
def format_script(self,fstype='ext3'):
""" return a shell script giving the code to commands required to
format the single LUN represented by a given drobo...
pscheme is one of: mbr, apt, gpt,
gpt - >= 2 TB, linux or windows...
mbr <= 2 TB good for FAT32
fstype is one of: fat32, ext3, ntfs (HPS+ is not supported on linux)
sizes in terabytes
not implemented yet...
each lun is formatted as a single primary partition.
partitions are never marked bootable.
need to detect each lun...
algorithm:
do discoverLUNs()
figure out which LUNs belong to the current Drobo... How?
-- do not want to partition LUNS on another Drobo!
That would be bad!
for l in LUN:
parted /dev/sd?? mklabel gpt mkpart pri ext3 0 -1
mke2fs -j ... /dev/sd??
"""
format_script='/tmp/fmtscript'
fd=open(format_script, 'w')
fd.write( "#!/bin/sh\n" )
if fstype == 'FAT32' or fstype == 'msdos':
ptype='msdos'
else:
ptype='gpt'
for cd in self.char_devs:
fd.write( "parted -s %s mklabel %s\n" % (cd, ptype) )
# there is a bit of a race condition creating the partition special file.
# the parted print gives a little time before starting the mkfs, to ensure
# file is there...
if fstype == 'ext3':
# -m 0 -- Drobo takes care of complaining when near the size limit.
# little point in complaining early, pretending you have less space.
# ^resize_inode -- Drobo makes the file system much bigger than the actual space
# available ( >= 2TB ) , so it doesn't make sense to allow space for future
# inode expansion beyond that. only makes sense in LVM, that's why this
# option is 'off' (the '^' at the beginning.)
# sparse_super -- there are lots too many superblock copies made by default.
# safe enough with fewer.
fd.write( "parted -s %s mkpart primary ext3 0 100%%\n" % cd )
fd.write( "parted -s %s print; sleep 5\n" % cd )
fd.write( 'mke2fs -j -i 262144 -L Drobo01 -m 0 -O sparse_super,^resize_inode %s1\n' % cd )
elif fstype == 'ntfs':
fd.write( "parted -s %s mkpart primary ntfs 0 100%%\n" % cd )
fd.write( "parted -s %s print; sleep 5\n" % cd )
fd.write( 'mkntfs -f -L Drobo01 %s1\n' % cd )
elif fstype == 'FAT32' or fstype == 'msdos':
fd.write( "parted -s %s mkpart primary fat32 0 100%%\n" % cd )
fd.write( "parted -s %s print; sleep 5\n" % cd )
fd.write( 'mkdosfs -v -v -F 32 -S 4096 -n Drobo01 %s1\n' % cd )
else:
print('unsupported partition type %s, sorry...' % fstype)
fd.close()
os.chmod(format_script,0o700)
return format_script
def __getsubpage(self,sub_page,pack):
"""Retrieve Sub page from drobo block device.
Uses DroboIOctl class to run the raw ioctl.
sub_page: selection code from DMP Spec...
pack: the pattern of fields in the subpage...
returns: a list unpacked according to the structure
Each sub_page has a standard header:
pack is prepended with a standard header '>BBH'
Drobo is bigendian.
first byte has some flags and a vendor code.
second byte is the sub-page code.
following two bytes have the length of the record (max: 65535)
"""
if DEBUG & DBG_HWDialog:
print('getsubpage')
if DEBUG & DBG_Simulation:
return ()
mypack = '>BBH' + pack
paklen=struct.calcsize(mypack)
if DEBUG & DBG_RawReturn :
print('DMIP sub_page query:0x%02x pattern: %s ' % (sub_page,mypack))
modepageblock=struct.pack( ">BBBBBBBHB",
0x5a, 0, 0x3a, sub_page, 0, 0, 0, paklen, 0 )
cmdout = self.fd.get_sub_page(paklen, modepageblock,0, DEBUG)
if len(cmdout) != paklen:
print('expected %d, got %d bytes' %( len(cmdout), paklen ))
raise DroboException("cmdout is unexpected length")
# print 'Pack: ' + mypack
result = struct.unpack(mypack, cmdout)
if DEBUG & DBG_HWDialog :
print('4 byte returned sense buffer header: 0x%x, 0x%x, 0x%x' % result[:3])
if DEBUG & DBG_RawReturn :
print('DMIP response sub_page:0x%02x returned: %s ' % (sub_page,str(result[3:])))
return result[3:]
def __transactionNext(self):
""" Increment the transaction member for some modeSelect pages.
"""
if (self.transactionID > MAX_TRANSACTION):
self.transactionID=0
self.transactionID=self.transactionID+1
def __issueCommand(self,command):
""" issue a command to a Drobo...
0x06 - blink.
0x0d - Standby
returns nothing, look at the drobo to see if it worked.
note: command is asynchronous, returns before operation is complete.
"""
if DEBUG & DBG_HWDialog:
print('issuecommand...')
if DEBUG & DBG_Simulation:
self.__transactionNext()
return
modepageblock=struct.pack( ">BBBBBBBHB",
0xea, 0x10, 0x00, command, 0x00, self.transactionID, 0x01 <<5, 0x01, 0x00 )
try:
cmdout = self.fd.get_sub_page(1, modepageblock,1,DEBUG)
except:
print('IF you see, "bad address", it is because you need to be the super user...')
print(" try sudo or su ... ")
sys.exit()
self.__transactionNext()
if ( len(cmdout) != 1 ):
raise DroboException
# only way to verify success is to look at the Drobo...
def Sync(self,NewName=None):
""" Set the Drobo's current time to the host's time,
and the name to selected value.
STATUS: works, maybe...
DRI claims Drobos are all in California time. afaict, it ignores TZ completely.
I feed it UTC, and when I read the time, normal routines convert to local time.
so it looks perfect. but diagnostics might not agree.
"""
if DEBUG & DBG_Simulation:
return
now=int(time.time())
payload="LH32s"
payloadlen=struct.calcsize(payload)
if NewName==None:
NewName=self.GetSubPageSettings()[2]
buffer=struct.pack( ">BBH" + payload , 0x7a, 0x05, payloadlen, now, 0 , NewName )
sblen=len(buffer)
# mode select CDB.
modepageblock=struct.pack( ">BBBBBBBHB", 0x55, 0x01, 0x7a, 0x05, 0, 0, 0, sblen, 0)
self.fd.put_sub_page( modepageblock, buffer, DEBUG )
def SetOptions(self,options):
""" Set Options.
accepts a set of options as returned by GetOptions
STATUS: working.
basic thresholds work on Drobo v1.
OPTIONS2 tested by folks on the internet. Seem OK.
"""
# v1 Options first...
fmt = 'BBBLBB'
payloadlen=struct.calcsize(fmt)
buffer = struct.pack(">BBH" + fmt, 0x7a, 0x30, payloadlen, options["YellowThreshold"], options["RedThreshold"], 0, 0, 0, 0 )
sblen=len(buffer)
modepageblock=struct.pack( ">BBBBBBBHB", 0x55, 0x01, 0x7a, 0x30, 0, 0, 0, sblen, 0)
self.fd.put_sub_page( modepageblock, buffer, DEBUG )
if ( 'SUPPORTS_OPTIONS2' in self.features ):
ip = struct.unpack('I', socket.inet_aton(options['IPAddress']))[0]
nm = struct.unpack('I',socket.inet_aton(options['NetMask']))[0]
rawip = socket.htonl(ip)
rawnm = socket.htonl(nm)
flags=0
if (options["DualDiskRedundancy"]):
flags |= 0x0001
if (options["SpinDownDelayMinutes"] > 0):
flags |= 0x0002
if (options["UseManualVolumeManagement"]):
flags |= 0x0004
if (options["UseStaticIPAddress"]):
flags |= 0x0008
fmt = 'QHLLB'
payloadlen=struct.calcsize(fmt)
# the ffff mask is there to suppress python 2.5 warning:
# DeprecationWarning: struct integer overflow masking is deprecated
# which is quite strange because not a problem in 2.6.
buffer = struct.pack(">BBH" + fmt, 0x7a, 0x31, payloadlen, \
flags, options["SpinDownDelayMinutes"], \
0xffffffff&rawip, 0xffffffff&rawnm, 0 )
sblen=len(buffer)
modepageblock=struct.pack( ">BBBBBBBHB", 0x55, 0x01, 0x7a, \
0x31, 0, 0, 0, sblen, 0)
self.fd.put_sub_page( modepageblock, buffer, DEBUG )
return
def SetLunSize(self,tb):
"""
SetLunSize - Sets the maximum LUN size to 'tb' terabytes
status: works with no issues!
"""
if (DEBUG & DBG_Chatty):
print('set lunsize to %d TiB' % tb)
if not self.umount():
if (DEBUG & DBG_Chatty):
print('cannot free up Drobo to set lunsize')
return
buffer=struct.pack( ">l", tb )
sblen=len(buffer)
# mode select CDB.
modepageblock=struct.pack( ">BBBBBBBHB",
0xea, 0x10, 0x0, 0x0f, 0, self.transactionID, (0x01 <<5)|0x01, sblen, 0x00 )
self.fd.put_sub_page( modepageblock, buffer, DEBUG )
self.__transactionNext()
def SlotCount(self):
self.GetSubPageConfig()
return self.slot_count
def Blink(self):
""" asks the Drobo nicely to blink it's lights. aka. Identification
If you happen to have five in a row (drool), you can know which is which.
STATUS: works, no issues.
"""
self.__issueCommand(6)
def Standby(self):
""" asks the Drobo nicely to shutdown, flushing all manner of caches.
STATUS: command itself works, no issues.... only light tests so far.
still testing umount code.
"""
if self.umount():
self.__issueCommand(0x0d)
def GetDiagRecord(self,diagcode,decrypt=0):
""" returns diagnostics as a string...
diagcodes are either 4 or 7 for the two different Records available.
STATUS: works fine.
decryption done in drobom (look at diagprint)
"""
if DEBUG & DBG_Chatty:
print("Dumping Diagnostics...")
# tried 32000 ... it only returned 5K, so try something small.
buflen=4096
modepageblock=struct.pack( ">BBBBBBBHB",
0xea, 0x10, 0x80, diagcode, 0x00, self.transactionID, (0x01 <<5)|0x01, buflen, 0x00 )
todev=0
if DEBUG & DBG_General:
print("Page 0...")
cmdout = self.fd.get_sub_page( buflen, modepageblock, todev, DEBUG )
diags=cmdout
i=0
while len(cmdout) == buflen:
modepageblock=struct.pack( ">BBBBBBBHB",
0xea, 0x10, 0x80, diagcode, 0x00, self.transactionID, 0x01, buflen, 0x00 )
cmdout = self.fd.get_sub_page( buflen, modepageblock, todev, DEBUG )
i=i+1
diags=diags+cmdout
if DEBUG & DBG_General:
print("diags ", i, ", cmdlen=", len(cmdout), " diagslen=", len(diags))
return diags
def dumpDiagnostics(self):
n=time.gmtime()
dfname="/tmp/DroboDiag_%d_%02d%02d_%02d%02d%02d.log" % ( n[0:6] )
df=open(dfname, "w")
d=self.GetDiagRecord(4)
df.write(d)
d=self.GetDiagRecord(7)
self.__transactionNext()
df.write(d)
df.close()
return dfname
def decodeDiagnostics(self,diagfilename):
try:
f=open( diagfilename )
data = f.read()
f.close()
except:
return ''
key = ord(data[0]) ^ 0x2d
datam = ''.join([chr(ord(x)^key) for x in data])
return datam
#
# constants for use with firmware operations
#
fwsite="ftp://updates.drobo.com/"
localfwrepository= os.path.expanduser("~") + "/.drobo-utils"
def localFirmwareRepository(self):
return Drobo.localfwrepository
def PickFirmware(self,name):
"""
read in a given firmware from disk.
sets self.fwdata
"""
if (DEBUG & DBG_Chatty):
print('Reading Firmware from = %s' % name)
if ( name[-1] == 'z' ): # data is zipped...
inqw=self.inquiry
hwlevel=inqw[10]
z=zipfile.ZipFile(name,'r')
for f in z.namelist():
if (DEBUG & DBG_General):
print(f , ' ? ')
print('firmware for hw rev ', f[-5] , ' this drobo is rev ', hwlevel[0])
if f[-5] == hwlevel[0]:
self.fwdata = z.read(f)
else: # old file...
f = open(name,'r')
self.fwdata = f.read()
f.close()
good = self.validateFirmware()
return good
def inquire(self):
"""
issue a standard SCSI INQUIRY command, return standard response as tuple.
STATUS: works.
trying to understand how to send an INQUIRY:
SCSI version 2 protocol INQUIRY...
protocol : T10/1236-D Revision 20
byte: 0 - descriptor code. 0x12 -- INQUIRY
1 - 00 peripheral dev. type code 0x0, 4, 5, 7, e ..
2 - reserved
3 - reserved.
4-27 target descriptor parameters.
0 - target descriptor type code: 0x04 - Identification.
28-31 dev. type params.
"""
dpropack = '>BBBBBBBB8s16s4s'
mypack= dpropack + '20sBB8HH'
paklen=struct.calcsize(mypack)
modepageblock=struct.pack( "BBBBBB", 0x12 , 0, 0, 0, paklen, 0 )
cmdout = self.fd.get_sub_page(paklen, modepageblock,0, DEBUG)
if ( len(cmdout) == paklen ):
ret = struct.unpack(mypack, cmdout)
else:
if ( len(cmdout) == 36 ): # we have a PRO...
ret = struct.unpack(dpropack, cmdout)
else:
print('warning: scsi inquire returned %d, bytes instead of %d expected.' % ( len(cmdout), paklen))
raise DroboException
if DEBUG & DBG_RawReturn :
print("inquiry response: ", str(ret))
return ret
def PickLatestFirmware(self):
"""
fetch firmware from web site. ... should be a .tdf or .tdz file.
validate firmware from header...
sets self.fwdata
go to fwsite
download index.txt
figure out which one to download.
return arch and version of firmware running, and the download file name.
SCSI INQUIRY is supposed to respond with 'VERSION' 1.0 or 2.0 to tell which to use.
tdz support: zip file containing two .tdf's. one for rev1, another for rev2.
status: works
"""
if DEBUG & DBG_Simulation:
return ('fwarch', 'fwv', 'hwlevel', 'value')
inqw=self.inquiry
hwlevel=inqw[10]
fwv= str(self.fw[0]) + '.' + str(self.fw[1]) + '.' + str(self.fw[2])
#FIXME ugly hack to force v1 to get onto the v2 firmware stream
# current dri index.txt file says v1's should run 1.1.2, but win/Mac dashboards upgrade
# to 1.2.4 anyways... so I guess linux should too.
# if a v1 is running 1.1.2, then just claim to be an early v2 firmware, all should work.
#if fwv == "1.200.11177":
# fwv="1.201.12942"
fwarch = self.fw[6].lower()
if (DEBUG & DBG_Chatty):
print('looking for firmware for:', fwarch, fwv, 'hw version:', hwlevel)
listing_file=urllib.request.urlopen( Drobo.fwsite + "index.txt")
list_of_firmware_string=listing_file.read().strip("\t\r")
list_of_firmware=list_of_firmware_string.split("|")
i=1
p = re.compile('\[(.*)\]')
while i < len(list_of_firmware):
key=list_of_firmware[i-1].split()[1]
value=list_of_firmware[i].split()[1]
k=key.split('/')
# profits oblige...
if k[2] == "licensed" :
k = k[0:2] + k[3:]
#print k
# these If's are now nested for ease of debugging, insert a print to taste...
# the algorithm is wrong wrt, other platforms...
if k[2] == "firmware" :
#print ' match firmware'
if k[3] == fwarch :
#print ' match k[3] = ', fwarch
#if we are on a line that lists the fwversion in [] fixup k[4]
m=p.search(list_of_firmware[i-1])
if m :
k[4]=m.group(1);
if k[4] == fwv:
if len(k) > 4:
if (DEBUG & DBG_Chatty):
print('This Drobo should be running: ', value)
return (fwarch, fwv, hwlevel, value)
i=i+2
if (DEBUG & DBG_Chatty):
print('no matching firmware found, must be the latest and greatest!')
return ( '','','','' )
def downloadFirmware( self, fwname, localfw ):
"""
download given fw file from network repository.
load self.fwdata with the data from it
STATUS: works.
"""
if (DEBUG & DBG_Chatty):
print('downloading firmware ', fwname, '...')
self.fwdata=None
firmware_url=urllib.request.urlopen( Drobo.fwsite + fwname )
filedata = firmware_url.read()
f = open(localfw,'w+')
f.write(filedata)
f.close()
if (DEBUG & DBG_Chatty ) :
print('local copy written')
if ( fwname[-1] == 'z' ): # data is zipped...
self.PickFirmware(localfw)
else:
self.fwdata=filedata
if (DEBUG & DBG_Chatty ) :
print('downloading done ')
return self.fwdata
def validateFirmware(self):
"""
requires self.fwdata to be initialized before calling.
read in the header of the firmware from self.fwdata.
check the information in the header to confirm that it is a valid firmware image.
status:
works for length, and body CRC. something wrong with header CRC.
according to dpd.h:
(hdrlength, hdrVersion, magic, imageVersion, targetName, sequenceNum, bootFailureCount, imageFlashAddress, imageLength, imageCrc32, about, hdrCrc32 ) = struct.unpack('llll16slllll256sl', self.fwdata[0:304])
& 0xffffffffL is a kludge to work around CRC32 returning different values on 32 vs. 64 bit platforms.
can remove once py3k arrives. (see: http://bugs.python.org/issue1202)
STATUS: working.
"""
if (DEBUG & DBG_Chatty):
print('validateFirmware start...')
self.fwhdr = struct.unpack('>ll4sl16slllll256sl', self.fwdata[0:312])
if len(self.fwdata) != ( self.fwhdr[0] + self.fwhdr[8] ) :
print('header corrupt... Length does not validate.')
return 0
if (DEBUG & DBG_Chatty):
print('header+body lengths validated. Good.')
#print self.fwhdr
if self.fwhdr[2] != 'TDIH' :
print('bad Magic, not a valid firmware')
return 0
if (DEBUG & DBG_Chatty):
print('Magic number validated. Good.')
print('%d + %d = %d length validated. Good.' % ( self.fwhdr[0], self.fwhdr[8], len(self.fwdata) ))
# http://bugs.python.org/issue1202
# doesn't work on 64 bit, only on 32bit... weird...
blank = struct.pack('i',0)
hdrcrc = zlib.crc32( self.fwdata[0:308] + blank + self.fwdata[312:self.fwhdr[0]] ) & 0xffffffff
r = self.fwhdr[11] & 0xffffffff
if (DEBUG & DBG_Chatty):
print('CRC from header: %d, calculated using python zlib crc32: %d ' % ( r, hdrcrc))
if r != hdrcrc :
print('file corrupt, header checksum wrong')
return 0
bodycrc = zlib.crc32( self.fwdata[self.fwhdr[0]:] ) & 0xffffffff
q = self.fwhdr[9] & 0xffffffff
if (DEBUG & DBG_Chatty):
print('CRC for body from header: %d, calculated: %d ' % ( q, bodycrc))
if q != bodycrc :
print('file corrupt, payload checksum wrong')
return 0
if (DEBUG & DBG_Chatty):
print('32 bit Cyclic Redundancy Check correct. Good.')
print('validateFirmware successful...')
return 1
def updateFirmwareRepository(self):
"""
put the best firmware in self.fwdata.
return 1 if successful, 0 if not.
determine currently running firmware and most current from web site.
check if the most current one has already been downloaded.
if not, then download it into a local repository.
Compare the current running firmware against the appropriate file
in the local repository
STATUS: working.
"""
(fwarch, fwversion, hwlevel, fwpath ) = self.PickLatestFirmware()
if fwarch == '' : # already at latest version...
return 0
if not os.path.exists(Drobo.localfwrepository) :
os.mkdir(Drobo.localfwrepository)
fwname = fwpath.split('/')
localfw = Drobo.localfwrepository + '/' + fwarch + '_' + hwlevel + '_' + fwname[-1]
if (DEBUG & DBG_Chatty):
print('looking for: %s' % localfw)
if not os.path.exists(localfw):
if (DEBUG & DBG_Chatty):
print('not present, fetching from drobo.com')
self.fwdata = self.downloadFirmware(fwpath,localfw)
good = self.validateFirmware()
if not good:
print('downloaded firmware did not validate.')
return 0
else:
if (DEBUG & DBG_Chatty):
print('local copy already present:', localfw)
good = self.PickFirmware(localfw)
if good:
if (DEBUG & DBG_Chatty):
print('correct fw available')
return 1
print('no valid firmware found')
return 0
def writeFirmware(self,function):
"""
given good firmware data, upload it to the Drobo...
1_README_*.txt from the resource kit is followed here.