3 # Copyright (c) 2003 Intel Corporation
6 # Copyright (c) 2004-2006 The Trustees of Princeton University
8 # expected /proc/partitions format
11 #----------------------------------------------------
12 #major minor #blocks name
19 #----------------------------------------------------
30 from Exceptions import *
33 a utility class for finding and returning information about
34 block devices, memory, and other hardware on the system
37 PROC_MEMINFO_PATH= "/proc/meminfo"
38 PROC_PARTITIONS_PATH= "/proc/partitions"
40 # set when the sfdisk -l <dev> trick has been done to make
42 DEVICES_SCANNED_FLAG= "/tmp/devices_scanned"
44 # a /proc/partitions block is 1024 bytes
45 # a GB to a HDD manufacturer is 10^9 bytes
46 BLOCKS_PER_GB = pow(10, 9) / 1024.0;
49 MODULE_CLASS_NETWORK= "network"
50 MODULE_CLASS_SCSI= "scsi"
52 #PCI_* is now defined in the pypci modules
53 #PCI_BASE_CLASS_NETWORK=0x02L
54 #PCI_BASE_CLASS_STORAGE=0x01L
56 def get_total_phsyical_mem(vars = {}, log = sys.stderr):
58 return the total physical memory of the machine, in kilobytes.
60 Return None if /proc/meminfo not readable.
64 meminfo_file= file(PROC_MEMINFO_PATH,"r")
70 for line in meminfo_file:
73 (fieldname,value)= string.split(line,":")
75 # this will happen for lines that don't have two values
76 # (like the first line on 2.4 kernels)
79 fieldname= string.strip(fieldname)
80 value= string.strip(value)
82 if fieldname == "MemTotal":
84 (total_memory,units)= string.split(value)
88 if total_memory == "" or total_memory == None or \
89 units == "" or units == None:
92 if string.lower(units) != "kb":
96 total_memory= int(total_memory)
105 def get_block_device_list(vars = {}, log = sys.stderr):
107 get a list of block devices from this system.
108 return an associative array, where the device name
109 (full /dev/device path) is the key, and the value
110 is a tuple of (major,minor,numblocks,gb_size,readonly)
113 # make sure we can access to the files/directories in /proc
114 if not os.access(PROC_PARTITIONS_PATH, os.F_OK):
117 # table with valid scsi/sata/ide/raid block device names
119 # add in valid sd and hd block device names
120 # also check for vd (virtio devices used with kvm)
121 for blk_prefix in ('sd','hd','vd'):
122 for blk_num in map ( \
123 lambda x: chr(x), range(ord('a'),ord('z')+1)):
124 devicename="%s%c" % (blk_prefix, blk_num)
125 valid_blk_names[devicename]=None
127 # add in valid scsi raid block device names
128 for M in range(0,1+1):
129 for N in range(0,7+1):
130 devicename = "cciss/c%dd%d" % (M,N)
131 valid_blk_names[devicename]=None
133 for devicename in valid_blk_names.keys():
134 # devfs under 2.4 (old boot cds) used to list partitions
135 # in a format such as scsi/host0/bus0/target0/lun0/disc
136 # and /dev/sda, etc. were just symlinks
138 devfsname= os.readlink( "/dev/%s" % devicename )
139 valid_blk_names[devfsname]=None
143 # only do this once every system boot
144 if not os.access(DEVICES_SCANNED_FLAG, os.R_OK):
146 # this is ugly. under devfs, device
147 # entries in /dev/scsi/.. and /dev/ide/...
148 # don't show up until you attempt to read
149 # from the associated device at /dev (/dev/sda).
150 # so, lets run sfdisk -l (list partitions) against
151 # most possible block devices, that way they show
152 # up when it comes time to do the install.
154 # 27.6.2012 - Using parted instead of sfdisk, assuming
155 # that doing so respects the behavior mentioned above.
157 devicenames = valid_blk_names.keys()
159 for devicename in devicenames:
160 os.system( "parted --script --list /dev/%s > /dev/null 2>&1" % devicename )
163 fb = open(DEVICES_SCANNED_FLAG,"w")
168 partitions_file= file(PROC_PARTITIONS_PATH,"r")
170 for line in partitions_file:
171 line_count= line_count + 1
173 # skip the first two lines always
177 parts= string.split(line)
184 # skip and ignore any partitions
185 if not valid_blk_names.has_key(device):
191 blocks= int(parts[2])
192 except ValueError, err:
195 gb_size= blocks/BLOCKS_PER_GB
197 # check to see if the blk device is readonly
199 # can we write to it?
200 dev_name= "/dev/%s" % device
201 fb = open(dev_name,"w")
205 # check if EROFS errno
206 if errno.errorcode.get(e.errno,None) == 'EROFS':
209 # got some other errno, pretend device is readonly
212 devicelist[dev_name]= (major,minor,blocks,gb_size,readonly)
217 def get_system_modules( vars = {}, log = sys.stderr):
219 Return a list of kernel modules that this system requires.
220 This requires access to the installed system's root
221 directory, as the following file must exist and is used:
222 <install_root>/lib/modules/(first entry if kernel_version unspecified)/modules.pcimap
224 If there are more than one kernels installed, and the kernel
225 version is not specified, then only the first one in
226 /lib/modules is used.
228 Returns a dictionary, keys being the type of module:
229 - scsi MODULE_CLASS_SCSI
230 - network MODULE_CLASS_NETWORK
231 The value being the kernel module name to load.
233 Some sata devices show up under an IDE device class,
234 hence the reason for checking for ide devices as well.
235 If there actually is a match in the pci -> module lookup
236 table, and its an ide device, its most likely sata,
237 as ide modules are built in to the kernel.
240 if not vars.has_key("SYSIMG_PATH"):
241 vars["SYSIMG_PATH"]="/"
242 SYSIMG_PATH=vars["SYSIMG_PATH"]
244 if not vars.has_key("NODE_MODEL_OPTIONS"):
245 vars["NODE_MODEL_OPTIONS"] = 0;
247 initrd, kernel_version = getKernelVersion(vars, log)
249 # get the kernel version we are assuming
250 if kernel_version is None:
252 kernel_version= os.listdir( "%s/lib/modules/" % SYSIMG_PATH )
256 if len(kernel_version) == 0:
259 if len(kernel_version) > 1:
260 print( "WARNING: We may be returning modules for the wrong kernel." )
262 kernel_version= kernel_version[0]
264 print( "Using kernel version %s" % kernel_version )
266 # test to make sure the file we need is present
267 modules_pcimap_path = "%s/lib/modules/%s/modules.pcimap" % \
268 (SYSIMG_PATH,kernel_version)
269 if not os.access(modules_pcimap_path,os.R_OK):
270 print( "WARNING: Unable to read %s" % modules_pcimap_path )
273 pcimap = pypcimap.PCIMap(modules_pcimap_path)
275 # this is the actual data structure we return
278 # these are the lists that will be in system_mods
282 # XXX: this is really similar to what BootCD/conf_files/pl_hwinit does. merge?
283 pcidevs = get_devices()
285 devlist=pcidevs.keys()
289 base = (dev[4] & 0xff0000) >> 16
290 modules = pcimap.get(dev)
291 if base not in (PCI_BASE_CLASS_STORAGE,
292 PCI_BASE_CLASS_NETWORK):
293 # special exception for forcedeth NICs whose base id
294 # claims to be a Bridge, even though it is clearly a
296 if "forcedeth" in modules:
297 base=PCI_BASE_CLASS_NETWORK
302 if base == PCI_BASE_CLASS_NETWORK:
303 network_mods += modules
304 elif base == PCI_BASE_CLASS_STORAGE:
307 system_mods[MODULE_CLASS_SCSI]= scsi_mods
308 system_mods[MODULE_CLASS_NETWORK]= network_mods
313 def getKernelVersion( vars = {} , log = sys.stderr):
314 # make sure we have the variables we need
316 SYSIMG_PATH= vars["SYSIMG_PATH"]
317 if SYSIMG_PATH == "":
318 raise ValueError, "SYSIMG_PATH"
320 NODE_MODEL_OPTIONS=vars["NODE_MODEL_OPTIONS"]
321 except KeyError, var:
322 raise BootManagerException, "Missing variable in vars: %s\n" % var
323 except ValueError, var:
324 raise BootManagerException, "Variable in vars, shouldn't be: %s\n" % var
327 if NODE_MODEL_OPTIONS & ModelOptions.SMP:
330 os.stat("%s/boot/kernel-boot%s" % (SYSIMG_PATH,option))
331 os.stat("%s/boot/initrd-boot%s" % (SYSIMG_PATH,option))
333 # smp kernel is not there; remove option from modeloptions
334 # such that the rest of the code base thinks we are just
335 # using the base kernel.
336 NODE_MODEL_OPTIONS = NODE_MODEL_OPTIONS & ~ModelOptions.SMP
337 vars["NODE_MODEL_OPTIONS"] = NODE_MODEL_OPTIONS
338 log.write( "WARNING: Couldn't locate smp kernel.\n")
341 initrd= os.readlink( "%s/boot/initrd-boot%s" % (SYSIMG_PATH,option) )
342 kernel_version= initrd.replace("initrd-", "").replace(".img", "")
345 kernel_version = None
347 return (initrd, kernel_version)
350 if __name__ == "__main__":
351 devices= get_block_device_list()
352 print "block devices detected:"
354 print "no devices found!"
356 for dev in devices.keys():
357 print "%s %s" % (dev, repr(devices[dev]))
361 memory= get_total_phsyical_mem()
363 print "unable to read /proc/meminfo for memory"
365 print "total physical memory: %d kb" % memory
370 kernel_version = None
371 if len(sys.argv) > 2:
372 kernel_version = sys.argv[1]
374 modules= get_system_modules()
376 print "unable to list system modules"
378 for module_class in (MODULE_CLASS_SCSI,MODULE_CLASS_NETWORK):
379 if len(modules[module_class]) > 0:
381 for a_mod in modules[module_class]:
382 module_list = module_list + "%s " % a_mod
383 print "all %s modules: %s" % (module_class, module_list)