/[gli]/trunk/src/GLIStorageDevice.py
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Contents of /trunk/src/GLIStorageDevice.py

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Revision 530 - (hide annotations) (download) (as text)
Fri Apr 29 05:57:09 2005 UTC (15 years, 6 months ago) by agaffney
File MIME type: text/x-python
File size: 25698 byte(s)
Fixed missing int()s

1 agaffney 107 import commands, string, re, os, parted
2 agaffney 530 #from decimal import Decimal
3 agaffney 107
4 agaffney 492 MEGABYTE = 1024 * 1024
5    
6 agaffney 497 archinfo = { 'sparc': { 'fixedparts': [ { 'minor': 3, 'type': "wholedisk" } ], 'disklabel': 'sun', 'extended': False },
7     'hppa': { 'fixedparts': [ { 'minor': 1, 'type': "boot" } ], 'disklabel': 'msdos', 'extended': False },
8     'x86': { 'fixedparts': [], 'disklabel': 'msdos', 'extended': True },
9     'ppc': { 'fixedparts': [ { 'minor': 1, 'type': "metadata" } ], 'disklabel': 'mac', 'extended': False }
10     }
11    
12 agaffney 513 ##
13     # This class provides a partitioning abstraction for the frontends
14 agaffney 107 class Device:
15     "Class representing a partitionable device."
16    
17     _device = None
18     _partitions = None
19     _geometry = None
20     _total_bytes = 0
21     _total_sectors = 0
22     _cylinder_bytes = 0
23     _sectors_in_cylinder = 0
24     _parted_dev = None
25     _parted_disk = None
26 agaffney 212 _sector_bytes = 0
27 agaffney 492 _total_mb = 0
28     _arch = None
29    
30 agaffney 509 ##
31 agaffney 513 # Initialization function for GLIStorageDevice class
32     # @param device Device node (e.g. /dev/hda) of device being represented
33     # @param arch="x86" Architecture that we're partition for (defaults to 'x86' for now)
34 agaffney 492 def __init__(self, device, arch="x86"):
35 agaffney 107 self._device = device
36     self._partitions = {}
37     self._geometry = {'cylinders': 0, 'heads': 0, 'sectors': 0, 'sectorsize': 512}
38     self._total_bytes = 0
39     self._cylinder_bytes = 0
40 agaffney 492 self._arch = arch
41 agaffney 107 self._parted_dev = parted.PedDevice.get(self._device)
42     self._parted_disk = parted.PedDisk.new(self._parted_dev)
43     self.set_disk_geometry_from_disk()
44    
45 agaffney 509 ##
46 agaffney 513 # Sets disk geometry info from disk. This function is used internally by __init__()
47 agaffney 107 def set_disk_geometry_from_disk(self):
48     self._total_bytes = self._parted_dev.length * self._parted_dev.sector_size
49 agaffney 205 self._geometry['heads'], self._geometry['sectors'], self._geometry['cylinders'] = self._parted_dev.heads, self._parted_dev.sectors, self._parted_dev.cylinders
50 agaffney 212 self._sector_bytes = self._parted_dev.sector_size
51     self._cylinder_bytes = self._geometry['heads'] * self._geometry['sectors'] * self._sector_bytes
52     self._total_sectors = self._parted_dev.length
53 agaffney 107 self._sectors_in_cylinder = self._geometry['heads'] * self._geometry['sectors']
54 agaffney 492 self._total_mb = int(self._total_bytes / MEGABYTE)
55 agaffney 107
56 agaffney 509 ##
57 agaffney 513 # Sets partition info from disk.
58 agaffney 107 def set_partitions_from_disk(self):
59 agaffney 492 last_part = 0
60     last_log_part = 4
61 agaffney 107 parted_part = self._parted_disk.next_partition()
62 agaffney 492 while parted_part:
63     part_mb = int((parted_part.geom.end - parted_part.geom.start + 1) * self._sector_bytes / MEGABYTE)
64     if parted_part.num >= 1:
65 agaffney 113 fs_type = ""
66     if parted_part.fs_type != None: fs_type = parted_part.fs_type.name
67     if parted_part.type == 2: fs_type = "extended"
68 agaffney 501 if archinfo[self._arch]['extended'] and parted_part.num > 4:
69     last_log_part = parted_part.num
70     else:
71     last_part = parted_part.num
72 agaffney 492 self._partitions[int(parted_part.num)] = Partition(self, parted_part.num, part_mb, parted_part.geom.start, parted_part.geom.end, fs_type, format=False, existing=True)
73     elif parted_part.type_name == "free":
74     parent_part = self.get_partition_at(parted_part.geom.start, ignore_extended=0)
75     if parent_part:
76 agaffney 530 self._partitions[last_log_part+0.9] = Partition(self, last_log_part+0.9, part_mb, parted_part.geom.start, parted_part.geom.end, "free", format=False, existing=False)
77 agaffney 492 last_log_part += 1
78     else:
79 agaffney 530 self._partitions[last_part+0.1] = Partition(self, last_part+0.1, part_mb, parted_part.geom.start, parted_part.geom.end, "free", format=False, existing=False)
80 agaffney 492 last_part += 1
81     parted_part = self._parted_disk.next_partition(parted_part)
82 agaffney 107
83 agaffney 509 ##
84 agaffney 513 # Imports partition info from the install profile partition structure (currently does nothing)
85     # @param ips Parameter structure returned from install_profile.get_partition_tables()
86 agaffney 492 def set_partitions_from_install_profile_structure(self, ips):
87     pass
88     # for part in ips:
89     # tmppart = ips[part]
90     # existing = False
91     # parted_part = self._parted_disk.get_partition(part)
92     # if parted_part != None:
93     # start = parted_part.geom.start / self._sectors_in_cylinder
94     # end = parted_part.geom.end / self._sectors_in_cylinder
95     # fs_type = ""
96     # if parted_part.fs_type != None: fs_type = parted_part.fs_type.name
97     # if parted_part.type == 2: fs_type = "extended"
98     # if int(tmppart['start']) == int(start) and int(tmppart['end']) == int(end) and tmppart['type'] == fs_type and tmppart['format'] == False:
99     # existing = True
100     # self._partitions[int(part)] = Partition(self, part, '', tmppart['start'], tmppart['end'], 0, tmppart['type'], mountopts=tmppart['mountopts'], mountpoint=tmppart['mountpoint'], format=tmppart['format'], existing=(not tmppart['format']))
101    
102 agaffney 509 ##
103 agaffney 513 # Returns name of device (e.g. /dev/hda) being represented
104 agaffney 107 def get_device(self):
105     return self._device
106    
107 agaffney 509 ##
108 agaffney 513 # Combines free space and closes gaps in minor numbers. This is used internally
109 agaffney 494 def tidy_partitions(self):
110     last_minor = 0
111     last_log_minor = 4
112     last_free = 0
113     last_log_free = 0
114     parts = self._partitions.keys()
115     parts.sort()
116     for part in parts:
117 agaffney 497 if archinfo[self._arch]['extended'] and part > 4: break
118 agaffney 494 tmppart = self._partitions[part]
119     if tmppart.get_type() == "extended":
120     for part_log in parts:
121 agaffney 530 if part_log < 4.9: continue
122 agaffney 494 tmppart_log = self._partitions[part_log]
123     if tmppart_log.get_type() == "free":
124 agaffney 495 if last_log_minor < last_log_free:
125     self._partitions[last_log_free].set_mb(self._partitions[last_log_free].get_mb()+tmppart_log.get_mb())
126     del self._partitions[part_log]
127 agaffney 494 else:
128 agaffney 495 if not last_log_free:
129 agaffney 530 last_log_free = last_log_minor + 0.9
130 agaffney 495 tmppart_log.set_minor(last_log_free)
131     self._partitions[last_log_free] = tmppart_log
132     if part_log != last_log_free: del self._partitions[part_log]
133     continue
134 agaffney 494 last_log_free = part_log
135     else:
136     if part_log > (last_log_minor + 1):
137     tmppart_log.set_minor(last_log_minor + 1)
138 agaffney 495 last_log_minor = last_log_minor + 1
139     self._partitions[last_log_minor] = tmppart_log
140     del self._partitions[part_log]
141     continue
142 agaffney 494 last_log_minor = part_log
143     if tmppart.get_type() == "free":
144 agaffney 495 if last_minor < last_free:
145     self._partitions[last_free].set_mb(self._partitions[last_free].get_mb()+tmppart.get_mb())
146     del self._partitions[part]
147 agaffney 494 else:
148 agaffney 495 if not last_free:
149 agaffney 530 last_free = last_minor + 0.1
150 agaffney 495 tmppart.set_minor(last_free)
151     self._partitions[last_free] = tmppart
152     if part != last_free: del self._partitions[part]
153     continue
154 agaffney 494 last_free = part
155     else:
156     if part > (last_minor + 1):
157     tmppart.set_minor(last_minor + 1)
158 agaffney 495 last_minor = last_minor + 1
159     self._partitions[last_minor] = tmppart
160     del self._partitions[part]
161     continue
162 agaffney 494 last_minor = part
163    
164 agaffney 509 ##
165 agaffney 513 # Adds a new partition to the partition info
166     # @param free_minor minor of unallocated space partition is being created in
167     # @param mb size of partition in MB
168     # @param start Start sector (only used for existing partitions)
169     # @param end End sector (only used for existing partitions)
170     # @param type Partition type (ext2, ext3, fat32, linux-swap, free, extended, etc.)
171     # @param mountpoint='' Partition mountpoint
172     # @param mountopts='' Partition mount options
173 agaffney 492 def add_partition(self, free_minor, mb, start, end, type, mountpoint='', mountopts=''):
174 agaffney 530 free_minor = free_minor
175 agaffney 492 new_minor = int(free_minor) + 1
176 agaffney 494 # print "add_partition(): free_minor=" + str(free_minor) + ", new_minor=" + str(new_minor)
177 agaffney 492 if self._partitions.has_key(new_minor):
178 agaffney 107 parts = self._partitions.keys()
179     parts.sort()
180     parts.reverse()
181     hole_at = 0
182     for i in range(1, parts[0]+1):
183 agaffney 492 if i <= new_minor: continue
184     if not self._partitions.has_key(i):
185 agaffney 107 hole_at = i
186     break
187     stopscooting = 0
188     for i in parts:
189     if stopscooting: break
190 agaffney 492 if i >= hole_at and hole_at: continue
191     if i >= new_minor:
192 agaffney 107 self._partitions[i].set_minor(i+1)
193     self._partitions[i+1] = self._partitions[i]
194 agaffney 492 if i == new_minor: stopscooting = 1
195 agaffney 494 if mb != self._partitions[free_minor].get_mb():
196     old_free_mb = self._partitions[free_minor].get_mb()
197     del self._partitions[free_minor]
198 agaffney 497 if archinfo[self._arch]['extended'] and new_minor >= 5:
199 agaffney 530 free_minor = new_minor + 0.9
200 agaffney 494 else:
201 agaffney 530 free_minor = new_minor + 0.1
202 agaffney 494 self._partitions[free_minor] = Partition(self, free_minor, old_free_mb-mb, 0, 0, "free")
203     # print "add_partition(): new part doesn't use all freespace. new free part is: minor=" + str(free_minor)
204     else:
205     del self._partitions[free_minor]
206 agaffney 492 self._partitions[new_minor] = Partition(self, new_minor, mb, start, end, type, mountpoint=mountpoint, mountopts=mountopts)
207 agaffney 494 if type == "extended":
208 agaffney 530 self._partitions[4.9] = Partition(self, 4.9, mb, 0, 0, "free")
209 agaffney 494 self.tidy_partitions()
210 agaffney 107
211 agaffney 509 ##
212 agaffney 513 # Removes partition from partition info
213     # @param minor Minor of partition to remove
214 agaffney 107 def remove_partition(self, minor):
215 agaffney 492 tmppart = self._partitions[int(minor)]
216     free_minor = 0
217     if tmppart.is_logical():
218 agaffney 530 free_minor = minor-0.1
219 agaffney 492 else:
220 agaffney 530 free_minor = minor-0.9
221 agaffney 492 self._partitions[free_minor] = Partition(self, free_minor, tmppart.get_mb(), 0, 0, "free", format=False, existing=False)
222 agaffney 107 del self._partitions[int(minor)]
223 agaffney 494 self.tidy_partitions()
224 agaffney 107
225 agaffney 509 ##
226 agaffney 513 # Returns free space (no longer used)
227     # @param start Start sector for search
228 agaffney 107 def get_free_space(self, start):
229 agaffney 207 GAP_SIZE = 100
230 agaffney 107 parts = self._partitions.keys()
231     parts.sort()
232     lastend_pri = 0
233     lastend_log = 0
234     free_start = -1
235     free_end = -1
236 agaffney 205 if start > self._total_sectors: return (-1, -1)
237 agaffney 107 for part in parts:
238     if part > 4: break
239     tmppart = self._partitions[part]
240 agaffney 207 if (tmppart.get_start() > (lastend_pri + GAP_SIZE)) and (lastend_pri >= start):
241 agaffney 107 free_start = lastend_pri
242     free_end = tmppart.get_start() - 1
243     break
244     if tmppart.is_extended() and start < tmppart.get_end():
245     lastend_log = tmppart.get_start()
246     for part_log in parts:
247     if part_log < 5: continue
248     tmppart_log = self._partitions[part_log]
249 agaffney 207 if (tmppart_log.get_start() > (lastend_log + GAP_SIZE)) and (lastend_log >= start):
250 agaffney 107 free_start = lastend_log
251     free_end = tmppart_log.get_start() - 1
252     break
253     lastend_log = tmppart_log.get_end() + 1
254     if free_start == -1 and lastend_log < tmppart.get_end():
255     free_start = lastend_log
256     free_end = tmppart.get_end()
257 agaffney 112 break
258 agaffney 107 lastend_pri = tmppart.get_end() + 1
259 agaffney 205 if free_start == -1 and lastend_pri < self._total_sectors:
260 agaffney 107 free_start = lastend_pri
261 agaffney 205 free_end = self._total_sectors
262 agaffney 107 return (free_start, free_end)
263    
264 agaffney 509 ##
265 agaffney 513 # Gets partition containing a certain sector (no longer used)
266     # @param sector Sector to look at
267     # @param ignore_extended=1 Ignore extended partitions
268 agaffney 205 def get_partition_at(self, sector, ignore_extended=1):
269 agaffney 107 parts = self._partitions.keys()
270     parts.sort()
271     for part in parts:
272     tmppart = self._partitions[part]
273     if ignore_extended and tmppart.is_extended(): continue
274 agaffney 205 if (sector >= tmppart.get_start()) and (sector <= tmppart.get_end()):
275 agaffney 107 return part
276     return 0
277    
278 agaffney 509 ##
279 agaffney 513 # Returns free minor (no longer used)
280 agaffney 509 # @param start Parameter description
281     # @param end Parameter description
282 agaffney 107 def get_free_minor_at(self, start, end):
283     parts = self._partitions.keys()
284     parts.sort()
285     minor = 1
286     lastpart = 0
287     for part in parts:
288     if part > 4: break
289     tmppart = self._partitions[part]
290     if end < tmppart.get_start():
291     minor = part
292     if (minor - 1) > lastpart: minor = lastpart + 1
293     break
294     if tmppart.is_extended() and start < tmppart.get_end():
295     minor = 5
296     lastpart = 4
297     for part_log in parts:
298     if part_log < 5: continue
299     tmppart_log = self._partitions[part_log]
300     if end < tmppart_log.get_start():
301     minor = part_log
302     if (minor - 1) > lastpart: minor = lastpart + 1
303     break
304     minor = part_log + 1
305     lastpart = part_log
306     break
307     minor = part + 1
308     lastpart = part
309     return minor
310    
311 agaffney 509 ##
312 agaffney 513 # Returns an ordered list (disk order) of partition minors
313 agaffney 107 def get_ordered_partition_list(self):
314     parts = self._partitions.keys()
315     parts.sort()
316     partlist = []
317 agaffney 492 tmppart = None
318     for part in parts:
319 agaffney 530 if archinfo[self._arch]['extended'] and part > 4.1: break
320 agaffney 107 tmppart = self._partitions[part]
321 agaffney 492 partlist.append(part)
322 agaffney 107 if tmppart.is_extended():
323     for part_log in parts:
324 agaffney 530 if part_log < 4.9: continue
325 agaffney 107 tmppart_log = self._partitions[part_log]
326 agaffney 492 partlist.append(part_log)
327 agaffney 107 return partlist
328    
329 agaffney 509 ##
330 agaffney 513 # Returns partition info in a format suitable for passing to install_profile.set_partition_tables()
331 agaffney 107 def get_install_profile_structure(self):
332     devdic = {}
333     for part in self._partitions:
334     tmppart = self._partitions[part]
335 agaffney 492 devdic[part] = { 'mb': tmppart.get_mb(), 'minor': float(part), 'origminor': tmppart.get_orig_minor(), 'start': tmppart.get_start(), 'end': tmppart.get_end(), 'type': tmppart.get_type(), 'mountpoint': tmppart.get_mountpoint(), 'mountopts': tmppart.get_mountopts(), 'format': tmppart.get_format() }
336 agaffney 107 return devdic
337    
338 agaffney 509 ##
339 agaffney 513 # Returns the minor of the extended partition, if any
340 agaffney 183 def get_extended_partition(self):
341     for part in self._partitions:
342     tmppart = self._partitions[part]
343     if tmppart.is_extended():
344     return part
345 agaffney 184 return 0
346 agaffney 183
347 agaffney 509 ##
348 agaffney 513 # Returns the number of sectors on the device
349 agaffney 107 def get_num_sectors(self):
350     return int(self._total_sectors)
351    
352 agaffney 509 ##
353 agaffney 513 # Returns the size of a cylinder in bytes
354 agaffney 107 def get_cylinder_size(self):
355     return int(self._cylinder_bytes)
356    
357 agaffney 509 ##
358 agaffney 513 # Returns the size of a sector in bytes
359 agaffney 212 def get_sector_size(self):
360     return int(self._sector_bytes)
361    
362 agaffney 509 ##
363 agaffney 513 # Returns the number of cylinders
364 agaffney 107 def get_num_cylinders(self):
365     return int(self._geometry['cylinders'])
366    
367 agaffney 509 ##
368 agaffney 513 # Returns the total number of bytes on the device
369 agaffney 107 def get_drive_bytes(self):
370     return int(self._total_bytes)
371    
372 agaffney 509 ##
373 agaffney 513 # Returns the total number of MB on the device
374 agaffney 492 def get_total_mb(self):
375     return self._total_mb
376    
377 agaffney 509 ##
378 agaffney 513 # Returns partition info dictionary
379 agaffney 107 def get_partitions(self):
380     return self._partitions
381    
382 agaffney 509 ##
383 agaffney 513 # Prints disk geometry to STDOUT (no longer used)
384 agaffney 107 def print_geometry(self):
385     print self._total_bytes, self._geometry
386    
387 agaffney 509 ##
388 agaffney 513 # Utility function for raising an exception
389     # @param message Error message
390 agaffney 107 def _error(self, message):
391     "Raises an exception"
392     raise "DeviceObjectError", message
393    
394 agaffney 509 ##
395 agaffney 513 # Utility function for running a command and returning it's output as a list
396     # @param cmd Command to run
397 agaffney 107 def _run(self, cmd):
398     "Runs a command and returns the output"
399    
400     # Run command
401     output_string = commands.getoutput(cmd)
402    
403     # What we will return
404     output_list = []
405    
406     # As long as there is a new line in the output_string
407     while output_string.find("\n") != -1:
408    
409     # Find the \n in the string
410     index = output_string.find("\n") + 1
411    
412     # Add the line to the output and remove it from
413     # the output_string
414     output_list.append(output_string[:index])
415     output_string = output_string[index:]
416    
417     # return output
418     return output_list
419    
420 agaffney 513 ##
421     # This class represents a partition within a GLIStorageDevice object
422 agaffney 107 class Partition:
423     "Class representing a single partition within a Device object"
424    
425     _device = None
426 agaffney 492 _minor = 0
427     _orig_minor = 0
428     _start = 0
429     _end = 0
430 agaffney 107 _type = None
431     _mountpoint = None
432     _mountopts = None
433     _format = None
434     _resizeable = None
435 agaffney 523 _min_mb_for_resize = 0
436 agaffney 492 _mb = 0
437 agaffney 107
438 agaffney 509 ##
439 agaffney 514 # Initialization function for the Partition class
440     # @param device Parent GLIStorageDevice object
441     # @param minor Minor of partition
442     # @param mb Parameter Size of partition in MB
443     # @param start Parameter Start sector of partition
444     # @param end Parameter Start sector of partition
445     # @param type Parameter Type of partition (ext2, ext3, fat32, linux-swap, free, extended, etc.)
446     # @param mountpoint='' Mountpoint of partition
447     # @param mountopts='' Mount options of partition
448     # @param format=True Format partition
449     # @param existing=False This partition exists on disk
450 agaffney 492 def __init__(self, device, minor, mb, start, end, type, mountpoint='', mountopts='', format=True, existing=False):
451 agaffney 107 self._device = device
452 agaffney 492 self._minor = float(minor)
453 agaffney 386 if existing: self._orig_minor = int(minor)
454 agaffney 107 self._start = int(start)
455     self._end = int(end)
456 agaffney 492 self._type = type or "unknown"
457 agaffney 107 self._mountpoint = mountpoint
458     self._mountopts = mountopts
459     self._format = format
460 agaffney 492 self._mb = mb
461 agaffney 231 if existing:
462 agaffney 492 self._orig_minor = self._minor
463 agaffney 231 parted_part = device._parted_disk.get_partition(minor)
464 agaffney 463 label_type = device._parted_disk.type.name
465     if label_type == "loop":
466 agaffney 466 dev_node = device._device
467     else:
468 agaffney 463 dev_node = device._device + str(minor)
469 agaffney 231 if type == "ntfs":
470 agaffney 463 min_bytes = int(commands.getoutput("ntfsresize -f --info " + dev_node + " | grep -e '^You might resize' | sed -e 's/You might resize at //' -e 's/ bytes or .\+//'"))
471 agaffney 523 self._min_mb_for_resize = int(min_bytes / MEGABYTE) + 1
472 agaffney 529 self._resizeable = True
473 agaffney 231 elif type == "ext2" or type == "ext3":
474 agaffney 530 block_size = int(string.strip(commands.getoutput("dumpe2fs -h " + dev_node + r" 2>&1 | grep -e '^Block size:' | sed -e 's/^Block size:\s\+//'")))
475     free_blocks = int(string.strip(commands.getoutput("dumpe2fs -h " + dev_node + r" 2>&1 | grep -e '^Free blocks:' | sed -e 's/^Free blocks:\s\+//'")))
476 agaffney 523 free_bytes = int(block_size * free_blocks)
477     # can't hurt to pad (the +50) it a bit since this is really just a guess
478     self._min_mb_for_resize = self._mb - int(free_bytes / MEGABYTE) + 50
479 agaffney 529 self._resizeable = True
480 agaffney 231 else:
481 agaffney 492 parted_part = self._device._parted_disk.get_partition(int(self._minor))
482 agaffney 301 try:
483     parted_fs = parted_part.geom.file_system_open()
484     except:
485     self._resizeable = False
486     return
487 agaffney 231 resize_constraint = parted_fs.get_resize_constraint()
488 agaffney 523 min_bytes = resize_constraint.min_size * self._device._sector_bytes
489     self._min_mb_for_resize = int(min_bytes / MEGABYTE) + 1
490 agaffney 231 self._resizeable = True
491 agaffney 107
492 agaffney 509 ##
493 agaffney 514 # Returns whether or not the partition is extended
494 agaffney 107 def is_extended(self):
495     if self._type == "extended":
496     return True
497     else:
498     return False
499    
500 agaffney 509 ##
501 agaffney 514 # Returns whether or not the partition is logical
502 agaffney 107 def is_logical(self):
503 agaffney 492 if self._type == "free":
504 agaffney 530 if int(self._minor) + 0.9 == self._minor:
505 agaffney 492 return True
506     else:
507     return False
508 agaffney 497 elif archinfo[self._device._arch]['extended'] and self._minor > 4:
509 agaffney 107 return True
510 agaffney 492 else:
511     return False
512 agaffney 107
513 agaffney 509 ##
514 agaffney 514 # Returns a list of logical partitions if this is an extended partition
515 agaffney 107 def get_logicals(self):
516 agaffney 184 if not self.is_extended():
517     return None
518 agaffney 107 logicals = []
519     start = self._start
520 agaffney 184 parts = self._device._partitions.keys()
521     parts.sort()
522     for part in parts:
523     if part < 5: continue
524 agaffney 107 logicals.append(part)
525     logicals.sort()
526     return logicals
527    
528 agaffney 509 ##
529 agaffney 514 # Returns the extened parent partition if this is a logical partition (no longer used)
530 agaffney 107 def get_extended_parent(self):
531 agaffney 184 if not self.is_logical():
532     return None
533     else:
534     return self._device.get_partition_at(self._start, ignore_extended=0)
535 agaffney 107
536 agaffney 509 ##
537 agaffney 514 # Sets the start sector for the partition
538     # @param start Start sector
539 agaffney 107 def set_start(self, start):
540     self._start = int(start)
541    
542 agaffney 509 ##
543 agaffney 514 # Returns the start sector for the partition
544 agaffney 107 def get_start(self):
545     return int(self._start)
546    
547 agaffney 509 ##
548 agaffney 514 # Sets the end sector of the partition
549     # @param end End sector
550 agaffney 107 def set_end(self, end):
551     self._end = int(end)
552    
553 agaffney 509 ##
554 agaffney 514 # Returns end sector for the partition
555 agaffney 107 def get_end(self):
556     return int(self._end)
557    
558 agaffney 509 ##
559 agaffney 514 # Returns size of partition in MB
560 agaffney 492 def get_mb(self):
561     return int(self._mb)
562    
563 agaffney 509 ##
564 agaffney 514 # Sets size of partition in MB
565 agaffney 509 # @param mb Parameter description
566 agaffney 494 def set_mb(self, mb):
567     self._mb = int(mb)
568    
569 agaffney 509 ##
570 agaffney 514 # Sets type of partition
571 agaffney 509 # @param type Parameter description
572 agaffney 107 def set_type(self, type):
573     self._type = type
574    
575 agaffney 509 ##
576 agaffney 514 # Returns type of partition
577 agaffney 107 def get_type(self):
578     return self._type
579    
580 agaffney 509 ##
581 agaffney 514 # Returns parent GLIStorageDevice object
582 agaffney 107 def get_device(self):
583     return self._device
584    
585 agaffney 509 ##
586 agaffney 514 # Sets minor of partition
587     # @param minor New minor
588 agaffney 107 def set_minor(self, minor):
589 agaffney 492 self._minor = float(minor)
590 agaffney 107
591 agaffney 509 ##
592 agaffney 514 # Returns minor of partition
593 agaffney 107 def get_minor(self):
594 agaffney 492 return float(self._minor)
595 agaffney 107
596 agaffney 509 ##
597 agaffney 514 # Sets the original minor of the partition
598 agaffney 509 # @param orig_minor Parameter description
599 agaffney 386 def set_orig_minor(self, orig_minor):
600     self._orig_minor = int(orig_minor)
601    
602 agaffney 509 ##
603 agaffney 514 # Returns the original minor of the partition
604 agaffney 386 def get_orig_minor(self):
605     return self._orig_minor
606    
607 agaffney 509 ##
608 agaffney 514 # Sets the mountpoint for the partition
609     # @param mountpoint Mountpoint
610 agaffney 107 def set_mountpoint(self, mountpoint):
611     self._mountpoint = mountpoint
612    
613 agaffney 509 ##
614 agaffney 514 # Returns the mountpoint for the partition
615 agaffney 107 def get_mountpoint(self):
616     return self._mountpoint
617    
618 agaffney 509 ##
619 agaffney 514 # Sets the mount options for the partition
620     # @param mountopts Mount options
621 agaffney 107 def set_mountopts(self, mountopts):
622     self._mountopts = mountopts
623    
624 agaffney 509 ##
625 agaffney 514 # Returns the mount options for the partition
626 agaffney 107 def get_mountopts(self):
627     return self._mountopts
628    
629 agaffney 509 ##
630 agaffney 514 # Set whether to format the partition
631 agaffney 523 # @param format Format this partition (True/False)
632 agaffney 107 def set_format(self, format):
633     self._format = format
634    
635 agaffney 509 ##
636 agaffney 514 # Returns whether to format the partition
637 agaffney 107 def get_format(self):
638     return self._format
639    
640 agaffney 509 ##
641 agaffney 523 # Returns whether the partition is resizeable
642     def is_resizeable(self):
643     return self._resizeable
644    
645     ##
646     # Returns minimum MB for resize
647     def get_min_mb_for_resize(self):
648     # if self.is_extended():
649     # min_size = self._start
650     # for part in self._device._partitions:
651     # if part < 5: continue
652     # if part.get_end > min_size: min_size = part.get_end()
653     # return min_size
654     # else:
655     if self._resizeable:
656     return self._min_mb_for_resize
657 agaffney 107 else:
658 agaffney 523 return -1
659 agaffney 107
660 agaffney 509 ##
661 agaffney 523 # Returns maximum MB for resize
662     def get_max_mb_for_resize(self):
663     free_minor = 0
664     if self.is_logical():
665 agaffney 530 free_minor = self._minor + 0.9
666 agaffney 523 else:
667 agaffney 530 free_minor = self._minor + 0.1
668 agaffney 523 if free_minor in self._device._partitions:
669     return self._mb + self._device._partitions[free_minor]._mb
670     else:
671     return self._mb
672 agaffney 107
673 agaffney 509 ##
674 agaffney 523 # Resizes the partition (ignore)
675 agaffney 514 # @param start New start sector
676     # @param end New end sector
677 agaffney 107 def resize(self, start, end):
678     part_at_start = self._device.get_partition_at(int(start))
679     part_at_end = self._device.get_partition_at(int(end))
680     logicals = None
681     if self.is_logical():
682     parent = self.get_extended_parent()
683     parentstart = int(self._device._partitions[parent].get_start())
684     parentend = int(self._device._partitions[parent].get_end())
685     if (start < parentstart) or (end > parentend): return 0
686     if self.is_extended():
687     logicals = self.get_logicals()
688     if len(logicals):
689     logicals_start = self._device._partitions[logicals[0]].get_start()
690     logicals_end = self._device._partitions[logicals[len(logicals)-1]].get_end()
691     if (start > logicals_start) or (end < logicals_end): return 0
692     if part_at_start in logicals: part_at_start = 0
693     if part_at_end in logicals: part_at_end = 0
694     if ((not part_at_start == 0) and (part_at_start != self._minor)) or ((not part_at_end == 0) and (part_at_end != self._minor)):
695     return 0
696     self.set_start(start)
697     self.set_end(end)
698     return 1
699    
700 agaffney 509 ##
701 agaffney 514 # Utility function to raise an exception
702     # @param message Error message
703 agaffney 107 def _error(self, message):
704     raise "PartitionObjectError", message
705    
706 agaffney 514 ##
707     # Returns a list of detected partitionable devices
708 agaffney 107 def detect_devices():
709     devices = []
710    
711     # Make sure sysfs exists
712     if not os.path.exists("/sys/bus"):
713     raise Exception, "no sysfs found (you MUST use a kernel >2.6)"
714     # Make sure /proc/partitions exists
715     if not os.path.exists("/proc/partitions"):
716     raise Exception, "/proc/partitions does not exist!"
717    
718     # Load /proc/partitions into the variable 'partitions'
719     partitions = []
720     for line in open("/proc/partitions"):
721     if len(line.split()) < 4 or not line.split()[0].isdigit() or \
722     not line.split()[1].isdigit():
723     continue
724    
725     # Get the major, minor and device name
726     major = line.split()[0]
727     minor = line.split()[1]
728     device = "/dev/" + line.split()[3]
729    
730     if not major.isdigit() or not minor.isdigit():
731     continue
732    
733     major = int(major)
734     minor = int(minor)
735    
736     # If there is no /dev/'device_name', then scan
737     # all the devices in /dev to try and find a
738     # devices with the same major and minor
739     if not os.path.exists(device):
740     device = None
741     for path, dirs, files in os.walk("/dev"):
742     for file in files:
743     full_file = os.path.join(path, file)
744     if not os.path.exists(full_file):
745     continue
746     statres = os.stat(full_file)
747     fmaj = os.major(statres.st_rdev)
748     fmin = os.minor(statres.st_rdev)
749     if fmaj == major and fmin == minor:
750     device = full_file
751     break
752     if not device:
753     continue
754    
755     partitions.append(( major, minor, device ))
756    
757     # Scan sysfs for the devices of type 'x'
758     # 'x' being a member of the list below:
759     for dev_type in [ "ide", "scsi" ]: # Other device types? usb? fw?
760     if os.path.exists("/sys/bus/" + dev_type):
761     sysfs_devices = os.listdir("/sys/bus/"+dev_type+"/devices")
762    
763     # For each device in the devices on that bus
764     for sysfs_device in sysfs_devices:
765     dev_file = "/sys/bus/" + dev_type + "/devices/"\
766     + sysfs_device + "/block/dev"
767    
768     # If the file is not a block device, loop
769     if not os.path.exists(dev_file):
770     continue
771    
772     # Get the major and minor info
773     try:
774     major, minor = open(dev_file).read().split(":")
775     major = int(major)
776     minor = int(minor)
777     except:
778     raise Exception, "invalid major minor in "\
779     + dev_file
780    
781     # Find a device listed in /proc/partitions
782     # that has the same minor and major as our
783     # current block device.
784     for record in partitions:
785     if major == record[0] and minor == record[1]:
786     devices.append(record[2])
787    
788     # We have assembled the list of devices, so return it
789     return devices

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