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

Contents of /trunk/src/GLIStorageDevice.py

Parent Directory Parent Directory | Revision Log Revision Log


Revision 595 - (hide annotations) (download) (as text)
Mon May 23 00:38:55 2005 UTC (15 years, 5 months ago) by agaffney
File MIME type: text/x-python
File size: 25663 byte(s)
  Missing colon in GLIClientConfiguration. Add fix to GLIStorageDevice to
  handle blank (no disklabel) disks.

1 agaffney 535 import commands, string, os, parted
2 agaffney 556 from GLIException import *
3 agaffney 595 import GLIUtility
4 agaffney 107
5 agaffney 492 MEGABYTE = 1024 * 1024
6    
7 agaffney 497 archinfo = { 'sparc': { 'fixedparts': [ { 'minor': 3, 'type': "wholedisk" } ], 'disklabel': 'sun', 'extended': False },
8     'hppa': { 'fixedparts': [ { 'minor': 1, 'type': "boot" } ], 'disklabel': 'msdos', 'extended': False },
9     'x86': { 'fixedparts': [], 'disklabel': 'msdos', 'extended': True },
10 agaffney 595 'amd64': { 'fixedparts': [], 'disklabel': 'msdos', 'extended': True },
11 agaffney 497 'ppc': { 'fixedparts': [ { 'minor': 1, 'type': "metadata" } ], 'disklabel': 'mac', 'extended': False }
12     }
13    
14 agaffney 513 ##
15     # This class provides a partitioning abstraction for the frontends
16 agaffney 107 class Device:
17     "Class representing a partitionable device."
18    
19     _device = None
20     _partitions = None
21     _geometry = None
22     _total_bytes = 0
23     _total_sectors = 0
24     _cylinder_bytes = 0
25     _sectors_in_cylinder = 0
26     _parted_dev = None
27     _parted_disk = None
28 agaffney 212 _sector_bytes = 0
29 agaffney 492 _total_mb = 0
30     _arch = None
31 agaffney 595 _disklabel = None
32 agaffney 492
33 agaffney 509 ##
34 agaffney 513 # Initialization function for GLIStorageDevice class
35     # @param device Device node (e.g. /dev/hda) of device being represented
36     # @param arch="x86" Architecture that we're partition for (defaults to 'x86' for now)
37 agaffney 492 def __init__(self, device, arch="x86"):
38 agaffney 107 self._device = device
39     self._partitions = {}
40     self._geometry = {'cylinders': 0, 'heads': 0, 'sectors': 0, 'sectorsize': 512}
41     self._total_bytes = 0
42     self._cylinder_bytes = 0
43 agaffney 492 self._arch = arch
44 agaffney 107 self._parted_dev = parted.PedDevice.get(self._device)
45 agaffney 595 try:
46     self._parted_disk = parted.PedDisk.new(self._parted_dev)
47     except:
48     self._parted_disk = self._parted_dev.disk_new_fresh(parted.disk_type_get(archinfo[self._arch]['disklabel']))
49     self._disklabel = self._parted_disk.type.name
50 agaffney 107 self.set_disk_geometry_from_disk()
51    
52 agaffney 509 ##
53 agaffney 513 # Sets disk geometry info from disk. This function is used internally by __init__()
54 agaffney 107 def set_disk_geometry_from_disk(self):
55     self._total_bytes = self._parted_dev.length * self._parted_dev.sector_size
56 agaffney 205 self._geometry['heads'], self._geometry['sectors'], self._geometry['cylinders'] = self._parted_dev.heads, self._parted_dev.sectors, self._parted_dev.cylinders
57 agaffney 212 self._sector_bytes = self._parted_dev.sector_size
58     self._cylinder_bytes = self._geometry['heads'] * self._geometry['sectors'] * self._sector_bytes
59     self._total_sectors = self._parted_dev.length
60 agaffney 107 self._sectors_in_cylinder = self._geometry['heads'] * self._geometry['sectors']
61 agaffney 492 self._total_mb = int(self._total_bytes / MEGABYTE)
62 agaffney 107
63 agaffney 509 ##
64 agaffney 513 # Sets partition info from disk.
65 agaffney 107 def set_partitions_from_disk(self):
66 agaffney 492 last_part = 0
67     last_log_part = 4
68 agaffney 107 parted_part = self._parted_disk.next_partition()
69 agaffney 492 while parted_part:
70     part_mb = int((parted_part.geom.end - parted_part.geom.start + 1) * self._sector_bytes / MEGABYTE)
71     if parted_part.num >= 1:
72 agaffney 113 fs_type = ""
73     if parted_part.fs_type != None: fs_type = parted_part.fs_type.name
74     if parted_part.type == 2: fs_type = "extended"
75 agaffney 501 if archinfo[self._arch]['extended'] and parted_part.num > 4:
76     last_log_part = parted_part.num
77     else:
78     last_part = parted_part.num
79 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)
80     elif parted_part.type_name == "free":
81     parent_part = self.get_partition_at(parted_part.geom.start, ignore_extended=0)
82     if parent_part:
83 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)
84 agaffney 492 last_log_part += 1
85     else:
86 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)
87 agaffney 492 last_part += 1
88     parted_part = self._parted_disk.next_partition(parted_part)
89 agaffney 107
90 agaffney 509 ##
91 agaffney 513 # Imports partition info from the install profile partition structure (currently does nothing)
92     # @param ips Parameter structure returned from install_profile.get_partition_tables()
93 agaffney 492 def set_partitions_from_install_profile_structure(self, ips):
94     pass
95     # for part in ips:
96     # tmppart = ips[part]
97     # existing = False
98     # parted_part = self._parted_disk.get_partition(part)
99     # if parted_part != None:
100     # start = parted_part.geom.start / self._sectors_in_cylinder
101     # end = parted_part.geom.end / self._sectors_in_cylinder
102     # fs_type = ""
103     # if parted_part.fs_type != None: fs_type = parted_part.fs_type.name
104     # if parted_part.type == 2: fs_type = "extended"
105     # if int(tmppart['start']) == int(start) and int(tmppart['end']) == int(end) and tmppart['type'] == fs_type and tmppart['format'] == False:
106     # existing = True
107     # 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']))
108    
109 agaffney 509 ##
110 agaffney 513 # Returns name of device (e.g. /dev/hda) being represented
111 agaffney 107 def get_device(self):
112     return self._device
113    
114 agaffney 509 ##
115 agaffney 513 # Combines free space and closes gaps in minor numbers. This is used internally
116 agaffney 494 def tidy_partitions(self):
117     last_minor = 0
118     last_log_minor = 4
119     last_free = 0
120     last_log_free = 0
121     parts = self._partitions.keys()
122     parts.sort()
123     for part in parts:
124 agaffney 497 if archinfo[self._arch]['extended'] and part > 4: break
125 agaffney 494 tmppart = self._partitions[part]
126     if tmppart.get_type() == "extended":
127     for part_log in parts:
128 agaffney 530 if part_log < 4.9: continue
129 agaffney 494 tmppart_log = self._partitions[part_log]
130     if tmppart_log.get_type() == "free":
131 agaffney 495 if last_log_minor < last_log_free:
132     self._partitions[last_log_free].set_mb(self._partitions[last_log_free].get_mb()+tmppart_log.get_mb())
133     del self._partitions[part_log]
134 agaffney 494 else:
135 agaffney 495 if not last_log_free:
136 agaffney 530 last_log_free = last_log_minor + 0.9
137 agaffney 544 else:
138     lost_log_free = part_log
139 agaffney 495 tmppart_log.set_minor(last_log_free)
140     self._partitions[last_log_free] = tmppart_log
141     if part_log != last_log_free: del self._partitions[part_log]
142     continue
143 agaffney 494 else:
144     if part_log > (last_log_minor + 1):
145     tmppart_log.set_minor(last_log_minor + 1)
146 agaffney 495 last_log_minor = last_log_minor + 1
147     self._partitions[last_log_minor] = tmppart_log
148     del self._partitions[part_log]
149     continue
150 agaffney 544 else:
151     last_log_minor = part_log
152 agaffney 494 if tmppart.get_type() == "free":
153 agaffney 495 if last_minor < last_free:
154     self._partitions[last_free].set_mb(self._partitions[last_free].get_mb()+tmppart.get_mb())
155     del self._partitions[part]
156 agaffney 494 else:
157 agaffney 495 if not last_free:
158 agaffney 530 last_free = last_minor + 0.1
159 agaffney 544 else:
160     last_free = part
161 agaffney 495 tmppart.set_minor(last_free)
162     self._partitions[last_free] = tmppart
163     if part != last_free: del self._partitions[part]
164     continue
165 agaffney 494 else:
166     if part > (last_minor + 1):
167     tmppart.set_minor(last_minor + 1)
168 agaffney 495 last_minor = last_minor + 1
169     self._partitions[last_minor] = tmppart
170     del self._partitions[part]
171     continue
172 agaffney 544 else:
173     last_minor = part
174 agaffney 494
175 agaffney 509 ##
176 agaffney 513 # Adds a new partition to the partition info
177     # @param free_minor minor of unallocated space partition is being created in
178     # @param mb size of partition in MB
179     # @param start Start sector (only used for existing partitions)
180     # @param end End sector (only used for existing partitions)
181     # @param type Partition type (ext2, ext3, fat32, linux-swap, free, extended, etc.)
182     # @param mountpoint='' Partition mountpoint
183     # @param mountopts='' Partition mount options
184 agaffney 492 def add_partition(self, free_minor, mb, start, end, type, mountpoint='', mountopts=''):
185 agaffney 530 free_minor = free_minor
186 agaffney 492 new_minor = int(free_minor) + 1
187 agaffney 494 # print "add_partition(): free_minor=" + str(free_minor) + ", new_minor=" + str(new_minor)
188 agaffney 492 if self._partitions.has_key(new_minor):
189 agaffney 107 parts = self._partitions.keys()
190     parts.sort()
191     parts.reverse()
192     hole_at = 0
193     for i in range(1, parts[0]+1):
194 agaffney 492 if i <= new_minor: continue
195     if not self._partitions.has_key(i):
196 agaffney 107 hole_at = i
197     break
198     stopscooting = 0
199     for i in parts:
200     if stopscooting: break
201 agaffney 492 if i >= hole_at and hole_at: continue
202     if i >= new_minor:
203 agaffney 107 self._partitions[i].set_minor(i+1)
204     self._partitions[i+1] = self._partitions[i]
205 agaffney 492 if i == new_minor: stopscooting = 1
206 agaffney 494 if mb != self._partitions[free_minor].get_mb():
207     old_free_mb = self._partitions[free_minor].get_mb()
208     del self._partitions[free_minor]
209 agaffney 497 if archinfo[self._arch]['extended'] and new_minor >= 5:
210 agaffney 530 free_minor = new_minor + 0.9
211 agaffney 494 else:
212 agaffney 530 free_minor = new_minor + 0.1
213 agaffney 494 self._partitions[free_minor] = Partition(self, free_minor, old_free_mb-mb, 0, 0, "free")
214     # print "add_partition(): new part doesn't use all freespace. new free part is: minor=" + str(free_minor)
215     else:
216     del self._partitions[free_minor]
217 agaffney 492 self._partitions[new_minor] = Partition(self, new_minor, mb, start, end, type, mountpoint=mountpoint, mountopts=mountopts)
218 agaffney 494 if type == "extended":
219 agaffney 530 self._partitions[4.9] = Partition(self, 4.9, mb, 0, 0, "free")
220 agaffney 494 self.tidy_partitions()
221 agaffney 107
222 agaffney 509 ##
223 agaffney 513 # Removes partition from partition info
224     # @param minor Minor of partition to remove
225 agaffney 107 def remove_partition(self, minor):
226 agaffney 492 tmppart = self._partitions[int(minor)]
227     free_minor = 0
228     if tmppart.is_logical():
229 agaffney 530 free_minor = minor-0.1
230 agaffney 492 else:
231 agaffney 530 free_minor = minor-0.9
232 agaffney 492 self._partitions[free_minor] = Partition(self, free_minor, tmppart.get_mb(), 0, 0, "free", format=False, existing=False)
233 agaffney 107 del self._partitions[int(minor)]
234 agaffney 494 self.tidy_partitions()
235 agaffney 107
236 agaffney 509 ##
237 agaffney 513 # Returns free space (no longer used)
238     # @param start Start sector for search
239 agaffney 107 def get_free_space(self, start):
240 agaffney 207 GAP_SIZE = 100
241 agaffney 107 parts = self._partitions.keys()
242     parts.sort()
243     lastend_pri = 0
244     lastend_log = 0
245     free_start = -1
246     free_end = -1
247 agaffney 205 if start > self._total_sectors: return (-1, -1)
248 agaffney 107 for part in parts:
249     if part > 4: break
250     tmppart = self._partitions[part]
251 agaffney 207 if (tmppart.get_start() > (lastend_pri + GAP_SIZE)) and (lastend_pri >= start):
252 agaffney 107 free_start = lastend_pri
253     free_end = tmppart.get_start() - 1
254     break
255     if tmppart.is_extended() and start < tmppart.get_end():
256     lastend_log = tmppart.get_start()
257     for part_log in parts:
258     if part_log < 5: continue
259     tmppart_log = self._partitions[part_log]
260 agaffney 207 if (tmppart_log.get_start() > (lastend_log + GAP_SIZE)) and (lastend_log >= start):
261 agaffney 107 free_start = lastend_log
262     free_end = tmppart_log.get_start() - 1
263     break
264     lastend_log = tmppart_log.get_end() + 1
265     if free_start == -1 and lastend_log < tmppart.get_end():
266     free_start = lastend_log
267     free_end = tmppart.get_end()
268 agaffney 112 break
269 agaffney 107 lastend_pri = tmppart.get_end() + 1
270 agaffney 205 if free_start == -1 and lastend_pri < self._total_sectors:
271 agaffney 107 free_start = lastend_pri
272 agaffney 205 free_end = self._total_sectors
273 agaffney 107 return (free_start, free_end)
274    
275 agaffney 509 ##
276 agaffney 513 # Gets partition containing a certain sector (no longer used)
277     # @param sector Sector to look at
278     # @param ignore_extended=1 Ignore extended partitions
279 agaffney 205 def get_partition_at(self, sector, ignore_extended=1):
280 agaffney 107 parts = self._partitions.keys()
281     parts.sort()
282     for part in parts:
283     tmppart = self._partitions[part]
284     if ignore_extended and tmppart.is_extended(): continue
285 agaffney 205 if (sector >= tmppart.get_start()) and (sector <= tmppart.get_end()):
286 agaffney 107 return part
287     return 0
288    
289 agaffney 509 ##
290 agaffney 513 # Returns free minor (no longer used)
291 agaffney 509 # @param start Parameter description
292     # @param end Parameter description
293 agaffney 107 def get_free_minor_at(self, start, end):
294     parts = self._partitions.keys()
295     parts.sort()
296     minor = 1
297     lastpart = 0
298     for part in parts:
299     if part > 4: break
300     tmppart = self._partitions[part]
301     if end < tmppart.get_start():
302     minor = part
303     if (minor - 1) > lastpart: minor = lastpart + 1
304     break
305     if tmppart.is_extended() and start < tmppart.get_end():
306     minor = 5
307     lastpart = 4
308     for part_log in parts:
309     if part_log < 5: continue
310     tmppart_log = self._partitions[part_log]
311     if end < tmppart_log.get_start():
312     minor = part_log
313     if (minor - 1) > lastpart: minor = lastpart + 1
314     break
315     minor = part_log + 1
316     lastpart = part_log
317     break
318     minor = part + 1
319     lastpart = part
320     return minor
321    
322 agaffney 509 ##
323 agaffney 513 # Returns an ordered list (disk order) of partition minors
324 agaffney 107 def get_ordered_partition_list(self):
325     parts = self._partitions.keys()
326     parts.sort()
327     partlist = []
328 agaffney 492 tmppart = None
329     for part in parts:
330 agaffney 530 if archinfo[self._arch]['extended'] and part > 4.1: break
331 agaffney 107 tmppart = self._partitions[part]
332 agaffney 492 partlist.append(part)
333 agaffney 107 if tmppart.is_extended():
334     for part_log in parts:
335 agaffney 530 if part_log < 4.9: continue
336 agaffney 492 partlist.append(part_log)
337 agaffney 107 return partlist
338    
339 agaffney 509 ##
340 agaffney 513 # Returns partition info in a format suitable for passing to install_profile.set_partition_tables()
341 agaffney 107 def get_install_profile_structure(self):
342     devdic = {}
343     for part in self._partitions:
344     tmppart = self._partitions[part]
345 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() }
346 agaffney 107 return devdic
347    
348 agaffney 509 ##
349 agaffney 513 # Returns the minor of the extended partition, if any
350 agaffney 183 def get_extended_partition(self):
351     for part in self._partitions:
352     tmppart = self._partitions[part]
353     if tmppart.is_extended():
354     return part
355 agaffney 184 return 0
356 agaffney 183
357 agaffney 509 ##
358 agaffney 513 # Returns the number of sectors on the device
359 agaffney 107 def get_num_sectors(self):
360     return int(self._total_sectors)
361    
362 agaffney 509 ##
363 agaffney 513 # Returns the size of a cylinder in bytes
364 agaffney 107 def get_cylinder_size(self):
365     return int(self._cylinder_bytes)
366    
367 agaffney 509 ##
368 agaffney 513 # Returns the size of a sector in bytes
369 agaffney 212 def get_sector_size(self):
370     return int(self._sector_bytes)
371    
372 agaffney 509 ##
373 agaffney 513 # Returns the number of cylinders
374 agaffney 107 def get_num_cylinders(self):
375     return int(self._geometry['cylinders'])
376    
377 agaffney 509 ##
378 agaffney 513 # Returns the total number of bytes on the device
379 agaffney 107 def get_drive_bytes(self):
380     return int(self._total_bytes)
381    
382 agaffney 509 ##
383 agaffney 513 # Returns the total number of MB on the device
384 agaffney 492 def get_total_mb(self):
385     return self._total_mb
386    
387 agaffney 509 ##
388 agaffney 513 # Returns partition info dictionary
389 agaffney 107 def get_partitions(self):
390     return self._partitions
391    
392 agaffney 509 ##
393 agaffney 513 # Prints disk geometry to STDOUT (no longer used)
394 agaffney 107 def print_geometry(self):
395     print self._total_bytes, self._geometry
396    
397 agaffney 509 ##
398 agaffney 513 # Utility function for running a command and returning it's output as a list
399     # @param cmd Command to run
400 agaffney 107 def _run(self, cmd):
401     "Runs a command and returns the output"
402    
403     # Run command
404     output_string = commands.getoutput(cmd)
405    
406     # What we will return
407     output_list = []
408    
409     # As long as there is a new line in the output_string
410     while output_string.find("\n") != -1:
411    
412     # Find the \n in the string
413     index = output_string.find("\n") + 1
414    
415     # Add the line to the output and remove it from
416     # the output_string
417     output_list.append(output_string[:index])
418     output_string = output_string[index:]
419    
420     # return output
421     return output_list
422    
423 agaffney 513 ##
424     # This class represents a partition within a GLIStorageDevice object
425 agaffney 107 class Partition:
426     "Class representing a single partition within a Device object"
427    
428     _device = None
429 agaffney 492 _minor = 0
430     _orig_minor = 0
431     _start = 0
432     _end = 0
433 agaffney 107 _type = None
434     _mountpoint = None
435     _mountopts = None
436     _format = None
437     _resizeable = None
438 agaffney 523 _min_mb_for_resize = 0
439 agaffney 492 _mb = 0
440 agaffney 107
441 agaffney 509 ##
442 agaffney 514 # Initialization function for the Partition class
443     # @param device Parent GLIStorageDevice object
444     # @param minor Minor of partition
445     # @param mb Parameter Size of partition in MB
446     # @param start Parameter Start sector of partition
447     # @param end Parameter Start sector of partition
448     # @param type Parameter Type of partition (ext2, ext3, fat32, linux-swap, free, extended, etc.)
449     # @param mountpoint='' Mountpoint of partition
450     # @param mountopts='' Mount options of partition
451     # @param format=True Format partition
452     # @param existing=False This partition exists on disk
453 agaffney 492 def __init__(self, device, minor, mb, start, end, type, mountpoint='', mountopts='', format=True, existing=False):
454 agaffney 107 self._device = device
455 agaffney 492 self._minor = float(minor)
456 agaffney 386 if existing: self._orig_minor = int(minor)
457 agaffney 107 self._start = int(start)
458     self._end = int(end)
459 agaffney 492 self._type = type or "unknown"
460 agaffney 107 self._mountpoint = mountpoint
461     self._mountopts = mountopts
462     self._format = format
463 agaffney 492 self._mb = mb
464 agaffney 231 if existing:
465 agaffney 492 self._orig_minor = self._minor
466 agaffney 231 parted_part = device._parted_disk.get_partition(minor)
467 agaffney 463 label_type = device._parted_disk.type.name
468     if label_type == "loop":
469 agaffney 466 dev_node = device._device
470     else:
471 agaffney 463 dev_node = device._device + str(minor)
472 agaffney 231 if type == "ntfs":
473 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 .\+//'"))
474 agaffney 523 self._min_mb_for_resize = int(min_bytes / MEGABYTE) + 1
475 agaffney 529 self._resizeable = True
476 agaffney 231 elif type == "ext2" or type == "ext3":
477 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\+//'")))
478     free_blocks = int(string.strip(commands.getoutput("dumpe2fs -h " + dev_node + r" 2>&1 | grep -e '^Free blocks:' | sed -e 's/^Free blocks:\s\+//'")))
479 agaffney 523 free_bytes = int(block_size * free_blocks)
480     # can't hurt to pad (the +50) it a bit since this is really just a guess
481     self._min_mb_for_resize = self._mb - int(free_bytes / MEGABYTE) + 50
482 agaffney 529 self._resizeable = True
483 agaffney 231 else:
484 agaffney 492 parted_part = self._device._parted_disk.get_partition(int(self._minor))
485 agaffney 301 try:
486     parted_fs = parted_part.geom.file_system_open()
487     except:
488     self._resizeable = False
489     return
490 agaffney 231 resize_constraint = parted_fs.get_resize_constraint()
491 agaffney 523 min_bytes = resize_constraint.min_size * self._device._sector_bytes
492     self._min_mb_for_resize = int(min_bytes / MEGABYTE) + 1
493 agaffney 231 self._resizeable = True
494 agaffney 107
495 agaffney 509 ##
496 agaffney 514 # Returns whether or not the partition is extended
497 agaffney 107 def is_extended(self):
498     if self._type == "extended":
499     return True
500     else:
501     return False
502    
503 agaffney 509 ##
504 agaffney 514 # Returns whether or not the partition is logical
505 agaffney 107 def is_logical(self):
506 agaffney 492 if self._type == "free":
507 agaffney 530 if int(self._minor) + 0.9 == self._minor:
508 agaffney 492 return True
509     else:
510     return False
511 agaffney 497 elif archinfo[self._device._arch]['extended'] and self._minor > 4:
512 agaffney 107 return True
513 agaffney 492 else:
514     return False
515 agaffney 107
516 agaffney 509 ##
517 agaffney 514 # Returns a list of logical partitions if this is an extended partition
518 agaffney 107 def get_logicals(self):
519 agaffney 184 if not self.is_extended():
520     return None
521 agaffney 107 logicals = []
522 agaffney 184 parts = self._device._partitions.keys()
523     parts.sort()
524     for part in parts:
525     if part < 5: continue
526 agaffney 107 logicals.append(part)
527     logicals.sort()
528     return logicals
529    
530 agaffney 509 ##
531 agaffney 514 # Returns the extened parent partition if this is a logical partition (no longer used)
532 agaffney 107 def get_extended_parent(self):
533 agaffney 184 if not self.is_logical():
534     return None
535     else:
536     return self._device.get_partition_at(self._start, ignore_extended=0)
537 agaffney 107
538 agaffney 509 ##
539 agaffney 514 # Sets the start sector for the partition
540     # @param start Start sector
541 agaffney 107 def set_start(self, start):
542     self._start = int(start)
543    
544 agaffney 509 ##
545 agaffney 514 # Returns the start sector for the partition
546 agaffney 107 def get_start(self):
547     return int(self._start)
548    
549 agaffney 509 ##
550 agaffney 514 # Sets the end sector of the partition
551     # @param end End sector
552 agaffney 107 def set_end(self, end):
553     self._end = int(end)
554    
555 agaffney 509 ##
556 agaffney 514 # Returns end sector for the partition
557 agaffney 107 def get_end(self):
558     return int(self._end)
559    
560 agaffney 509 ##
561 agaffney 514 # Returns size of partition in MB
562 agaffney 492 def get_mb(self):
563     return int(self._mb)
564    
565 agaffney 509 ##
566 agaffney 514 # Sets size of partition in MB
567 agaffney 509 # @param mb Parameter description
568 agaffney 494 def set_mb(self, mb):
569     self._mb = int(mb)
570    
571 agaffney 509 ##
572 agaffney 514 # Sets type of partition
573 agaffney 509 # @param type Parameter description
574 agaffney 107 def set_type(self, type):
575     self._type = type
576    
577 agaffney 509 ##
578 agaffney 514 # Returns type of partition
579 agaffney 107 def get_type(self):
580     return self._type
581    
582 agaffney 509 ##
583 agaffney 514 # Returns parent GLIStorageDevice object
584 agaffney 107 def get_device(self):
585     return self._device
586    
587 agaffney 509 ##
588 agaffney 514 # Sets minor of partition
589     # @param minor New minor
590 agaffney 107 def set_minor(self, minor):
591 agaffney 492 self._minor = float(minor)
592 agaffney 107
593 agaffney 509 ##
594 agaffney 514 # Returns minor of partition
595 agaffney 107 def get_minor(self):
596 agaffney 492 return float(self._minor)
597 agaffney 107
598 agaffney 509 ##
599 agaffney 514 # Sets the original minor of the partition
600 agaffney 509 # @param orig_minor Parameter description
601 agaffney 386 def set_orig_minor(self, orig_minor):
602     self._orig_minor = int(orig_minor)
603    
604 agaffney 509 ##
605 agaffney 514 # Returns the original minor of the partition
606 agaffney 386 def get_orig_minor(self):
607     return self._orig_minor
608    
609 agaffney 509 ##
610 agaffney 514 # Sets the mountpoint for the partition
611     # @param mountpoint Mountpoint
612 agaffney 107 def set_mountpoint(self, mountpoint):
613     self._mountpoint = mountpoint
614    
615 agaffney 509 ##
616 agaffney 514 # Returns the mountpoint for the partition
617 agaffney 107 def get_mountpoint(self):
618     return self._mountpoint
619    
620 agaffney 509 ##
621 agaffney 514 # Sets the mount options for the partition
622     # @param mountopts Mount options
623 agaffney 107 def set_mountopts(self, mountopts):
624     self._mountopts = mountopts
625    
626 agaffney 509 ##
627 agaffney 514 # Returns the mount options for the partition
628 agaffney 107 def get_mountopts(self):
629     return self._mountopts
630    
631 agaffney 509 ##
632 agaffney 514 # Set whether to format the partition
633 agaffney 523 # @param format Format this partition (True/False)
634 agaffney 107 def set_format(self, format):
635     self._format = format
636    
637 agaffney 509 ##
638 agaffney 514 # Returns whether to format the partition
639 agaffney 107 def get_format(self):
640     return self._format
641    
642 agaffney 509 ##
643 agaffney 523 # Returns whether the partition is resizeable
644     def is_resizeable(self):
645     return self._resizeable
646    
647     ##
648     # Returns minimum MB for resize
649     def get_min_mb_for_resize(self):
650     # if self.is_extended():
651     # min_size = self._start
652     # for part in self._device._partitions:
653     # if part < 5: continue
654     # if part.get_end > min_size: min_size = part.get_end()
655     # return min_size
656     # else:
657     if self._resizeable:
658     return self._min_mb_for_resize
659 agaffney 107 else:
660 agaffney 523 return -1
661 agaffney 107
662 agaffney 509 ##
663 agaffney 523 # Returns maximum MB for resize
664     def get_max_mb_for_resize(self):
665 agaffney 544 if self._resizeable:
666     free_minor = 0
667     if self.is_logical():
668     free_minor = self._minor + 0.9
669     else:
670     free_minor = self._minor + 0.1
671     if free_minor in self._device._partitions:
672     return self._mb + self._device._partitions[free_minor]._mb
673     else:
674     return self._mb
675 agaffney 523 else:
676 agaffney 544 return -1
677 agaffney 107
678 agaffney 509 ##
679 agaffney 544 # Resizes the partition
680     # @param mb New size in MB
681     def resize(self, mb):
682     free_minor = self._minor
683 agaffney 107 if self.is_logical():
684 agaffney 544 free_minor += 0.9
685     else:
686     free_minor += 0.1
687     if mb < self._mb:
688     # Shrinking
689     if not free_minor in self._device._partitions:
690     self._device._partitions[free_minor] = Partition(self._device, free_minor, 0, 0, 0, "free", format=False, existing=False)
691     self._device._partitions[free_minor]._mb += self._mb - mb
692     self._mb = mb
693     elif mb == self._mb + self._device._partitions[free_minor]._mb:
694     # Using all available unallocated space
695     del self._device._partitions[free_minor]
696     self._mb = mb
697     elif mb > self._mb:
698     # Growing
699     self._device._partitions[free_minor]._mb = mb - self._mb
700     self._mb = mb
701 agaffney 107
702 agaffney 514 ##
703     # Returns a list of detected partitionable devices
704 agaffney 107 def detect_devices():
705     devices = []
706    
707     # Make sure sysfs exists
708     if not os.path.exists("/sys/bus"):
709 agaffney 556 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "no sysfs found (you MUST use a kernel >2.6)")
710 agaffney 107 # Make sure /proc/partitions exists
711     if not os.path.exists("/proc/partitions"):
712 agaffney 556 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "/proc/partitions does not exist! Please make sure procfs is in your kernel and mounted!")
713 agaffney 107
714     # Load /proc/partitions into the variable 'partitions'
715     partitions = []
716     for line in open("/proc/partitions"):
717 agaffney 556 if len(line.split()) < 4 or not line.split()[0].isdigit() or not line.split()[1].isdigit():
718 agaffney 107 continue
719    
720     # Get the major, minor and device name
721     major = line.split()[0]
722     minor = line.split()[1]
723     device = "/dev/" + line.split()[3]
724    
725     if not major.isdigit() or not minor.isdigit():
726     continue
727    
728     major = int(major)
729     minor = int(minor)
730    
731     # If there is no /dev/'device_name', then scan
732     # all the devices in /dev to try and find a
733     # devices with the same major and minor
734     if not os.path.exists(device):
735     device = None
736     for path, dirs, files in os.walk("/dev"):
737 agaffney 535 for d_file in files:
738     full_file = os.path.join(path, d_file)
739 agaffney 107 if not os.path.exists(full_file):
740     continue
741     statres = os.stat(full_file)
742     fmaj = os.major(statres.st_rdev)
743     fmin = os.minor(statres.st_rdev)
744     if fmaj == major and fmin == minor:
745     device = full_file
746     break
747     if not device:
748     continue
749    
750     partitions.append(( major, minor, device ))
751    
752     # Scan sysfs for the devices of type 'x'
753     # 'x' being a member of the list below:
754     for dev_type in [ "ide", "scsi" ]: # Other device types? usb? fw?
755     if os.path.exists("/sys/bus/" + dev_type):
756     sysfs_devices = os.listdir("/sys/bus/"+dev_type+"/devices")
757    
758     # For each device in the devices on that bus
759     for sysfs_device in sysfs_devices:
760 agaffney 556 dev_file = "/sys/bus/" + dev_type + "/devices/" + sysfs_device + "/block/dev"
761 agaffney 107
762     # If the file is not a block device, loop
763     if not os.path.exists(dev_file):
764     continue
765    
766     # Get the major and minor info
767     try:
768     major, minor = open(dev_file).read().split(":")
769     major = int(major)
770     minor = int(minor)
771     except:
772 agaffney 556 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "invalid major minor in " + dev_file)
773 agaffney 107
774     # Find a device listed in /proc/partitions
775     # that has the same minor and major as our
776     # current block device.
777     for record in partitions:
778     if major == record[0] and minor == record[1]:
779     devices.append(record[2])
780 agaffney 595
781     # For testing the partitioning code
782     if GLIUtility.is_file("/tmp/disk.img"):
783     devices.append("/tmp/disk.img")
784    
785 agaffney 107 # We have assembled the list of devices, so return it
786     return devices

Properties

Name Value
svn:eol-style native

  ViewVC Help
Powered by ViewVC 1.1.20