/[gli]/trunk/src/GLIStorageDevice.py
Gentoo

Contents of /trunk/src/GLIStorageDevice.py

Parent Directory Parent Directory | Revision Log Revision Log


Revision 544 - (hide annotations) (download) (as text)
Mon May 2 14:33:21 2005 UTC (15 years, 6 months ago) by agaffney
File MIME type: text/x-python
File size: 25418 byte(s)
Readded resizing support.

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

Properties

Name Value
svn:eol-style native

  ViewVC Help
Powered by ViewVC 1.1.20