/[gli]/trunk/src/GLIStorageDevice.py
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  src/GLIStorageDevice.py:
  fix to unallocated space merging when last one is after part 4

1 # Copyright 1999-2005 Gentoo Foundation
2 # This source code is distributed under the terms of version 2 of the GNU
3 # General Public License as published by the Free Software Foundation, a copy
4 # of which can be found in the main directory of this project.
5
6 import commands, string, os, parted
7 from GLIException import *
8 import GLIUtility
9
10 MEGABYTE = 1024 * 1024
11
12 # these are here so that we can change them easily in future
13 # the values were chosen to represent perfect floating point representations
14 FREE_MINOR_FRAC_PRI = 1.0/32.0
15 FREE_MINOR_FRAC_LOG = 1.0/8.0
16
17 archinfo = { 'sparc': { 'fixedparts': [ { 'minor': 3, 'type': "wholedisk" } ], 'disklabel': 'sun', 'extended': False },
18 'hppa': { 'fixedparts': [ { 'minor': 1, 'type': "palo" } ], 'disklabel': 'msdos', 'extended': True },
19 'x86': { 'fixedparts': [], 'disklabel': 'msdos', 'extended': True },
20 'amd64': { 'fixedparts': [], 'disklabel': 'msdos', 'extended': True },
21 'ppc': { 'fixedparts': [ { 'minor': 1, 'type': "metadata" } ], 'disklabel': 'mac', 'extended': False }
22 }
23
24 ##
25 # This class provides a partitioning abstraction for the frontends
26 class Device:
27 "Class representing a partitionable device."
28
29 _device = None
30 _partitions = None
31 _geometry = None
32 _total_bytes = 0
33 _total_sectors = 0
34 _cylinder_bytes = 0
35 _sectors_in_cylinder = 0
36 _parted_dev = None
37 _parted_disk = None
38 _sector_bytes = 0
39 _total_mb = 0
40 _arch = None
41 _disklabel = None
42
43 ##
44 # Initialization function for GLIStorageDevice class
45 # @param device Device node (e.g. /dev/hda) of device being represented
46 # @param arch="x86" Architecture that we're partition for (defaults to 'x86' for now)
47 def __init__(self, device, arch="x86", set_geometry=True, virtual=False, local_device=True):
48 self._device = device
49 self._partitions = {}
50 self._geometry = {'cylinders': 0, 'heads': 0, 'sectors': 0, 'sectorsize': 512}
51 self._total_bytes = 0
52 self._cylinder_bytes = 0
53 self._arch = arch
54 self._local_device = local_device
55 if self._local_device:
56 self._parted_dev = parted.PedDevice.get(self._device)
57 try:
58 self._parted_disk = parted.PedDisk.new(self._parted_dev)
59 except:
60 self._parted_disk = self._parted_dev.disk_new_fresh(parted.disk_type_get(archinfo[self._arch]['disklabel']))
61 self._disklabel = self._parted_disk.type.name
62 else:
63 self._disklabel = archinfo[self._arch]['disklabel']
64 if set_geometry:
65 self.set_disk_geometry_from_disk()
66
67 ##
68 # Sets disk geometry info from disk. This function is used internally by __init__()
69 def set_disk_geometry_from_disk(self):
70 self._total_bytes = self._parted_dev.length * self._parted_dev.sector_size
71 self._geometry['heads'], self._geometry['sectors'], self._geometry['cylinders'] = self._parted_dev.heads, self._parted_dev.sectors, self._parted_dev.cylinders
72 self._sector_bytes = self._parted_dev.sector_size
73 self._cylinder_bytes = self._geometry['heads'] * self._geometry['sectors'] * self._sector_bytes
74 self._total_sectors = self._parted_dev.length
75 self._sectors_in_cylinder = self._geometry['heads'] * self._geometry['sectors']
76 self._total_mb = long(self._total_bytes / MEGABYTE)
77
78 ##
79 # Sets partition info from disk.
80 def set_partitions_from_disk(self):
81 last_part = 0
82 last_log_part = 4
83 parted_part = self._parted_disk.next_partition()
84 while parted_part:
85 part_mb = long((parted_part.geom.end - parted_part.geom.start + 1) * self._sector_bytes / MEGABYTE)
86 if parted_part.num >= 1:
87 fs_type = ""
88 if parted_part.fs_type != None: fs_type = parted_part.fs_type.name
89 if parted_part.type == 2: fs_type = "extended"
90 if archinfo[self._arch]['extended'] and parted_part.num > 4:
91 last_log_part = parted_part.num
92 else:
93 last_part = parted_part.num
94 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)
95 elif parted_part.type_name == "free":
96 # parent_part = self.get_partition_at(parted_part.geom.start, ignore_extended=0)
97 # if parent_part:
98 if self.get_extended_partition() and parted_part.geom.start >= self._partitions[self.get_extended_partition()].get_start() and parted_part.geom.end <= self._partitions[self.get_extended_partition()].get_end():
99 self._partitions[last_log_part+FREE_MINOR_FRAC_LOG] = Partition(self, last_log_part+FREE_MINOR_FRAC_LOG, part_mb, parted_part.geom.start, parted_part.geom.end, "free", format=False, existing=False)
100 last_log_part += 1
101 else:
102 self._partitions[last_part+FREE_MINOR_FRAC_PRI] = Partition(self, last_part+FREE_MINOR_FRAC_PRI, part_mb, parted_part.geom.start, parted_part.geom.end, "free", format=False, existing=False)
103 last_part += 1
104 parted_part = self._parted_disk.next_partition(parted_part)
105
106 ##
107 # Imports partition info from the install profile partition structure
108 # @param ips Parameter structure returned from install_profile.get_partition_tables()
109 def set_partitions_from_install_profile_structure(self, ips):
110 for part in ips:
111 tmppart = ips[part]
112 existing = False
113 if tmppart['origminor'] and not tmppart['format']:
114 existing = True
115 self._partitions[tmppart['minor']] = Partition(self, tmppart['minor'], tmppart['mb'], tmppart['start'], tmppart['end'], tmppart['type'], format=tmppart['format'], origminor=tmppart['origminor'], existing=existing, mountpoint=tmppart['mountpoint'], mountopts=tmppart['mountopts'], mkfsopts=tmppart['mkfsopts'])
116
117 ##
118 # Returns name of device (e.g. /dev/hda) being represented
119 def get_device(self):
120 return self._device
121
122 ##
123 # Uses magic to apply the recommended partition layout
124 def do_recommended(self):
125 free_minor = 0
126 recommended_parts = [ { 'type': "ext2", 'size': 100, 'mountpoint': "/boot" },
127 { 'type': "linux-swap", 'size': 512, 'mountpoint': "" },
128 { 'type': "ext3", 'size': "*", 'mountpoint': "/" } ]
129 to_create = []
130 physical_memory = int(GLIUtility.spawn(r"free -m | egrep '^Mem:' | sed -e 's/^Mem: \+//' -e 's/ \+.\+$//'", return_output=True)[1].strip())
131 parts = self.get_ordered_partition_list()
132 for part in parts:
133 if self._partitions[part].get_type() == "free" and self._partitions[part].get_mb() >= 4096:
134 free_minor = part
135 break
136 if not free_minor:
137 raise GLIException("RecommendedPartitionLayoutError", "notice", "do_recommended", "You do not have atleast 4GB of concurrent unallocated space. Please remove some partitions and try again.")
138 remaining_free = self._partitions[free_minor].get_mb()
139 for newpart in recommended_parts:
140 if archinfo[self._arch]['extended'] and free_minor == (3 + FREE_MINOR_FRAC_PRI) and not newpart == recommended_parts[-1]:
141 if self.get_extended_partition():
142 raise GLIException("RecommendedPartitionLayoutError", "notice", "do_recommended", "This code is not yet robust enough to handle automatic partitioning with your current layout.")
143 to_create.append({ 'type': "extended", 'size': remaining_free, 'mountpoint': "", 'free_minor': free_minor })
144 free_minor = 4 + FREE_MINOR_FRAC_LOG
145 newpart['free_minor'] = free_minor
146 if newpart['type'] == "linux-swap" and physical_memory and physical_memory < 1024:
147 newpart['size'] = physical_memory * 2
148 to_create.append(newpart)
149 free_minor = free_minor + 1
150 if not newpart['size'] == "*":
151 remaining_free = remaining_free - newpart['size']
152 for newpart in to_create:
153 if newpart['size'] == "*":
154 newpart['size'] = self._partitions[newpart['free_minor']].get_mb()
155 self.add_partition(newpart['free_minor'], newpart['size'], 0, 0, newpart['type'], mountpoint=newpart['mountpoint'])
156
157 ##
158 # Combines free space and closes gaps in minor numbers. This is used internally
159 def tidy_partitions(self):
160 last_minor = 0
161 last_log_minor = 4
162 last_free = 0
163 last_log_free = 0
164 parts = self._partitions.keys()
165 parts.sort()
166 for part in parts:
167 if archinfo[self._arch]['extended'] and part > (4 + FREE_MINOR_FRAC_PRI): break
168 tmppart = self._partitions[part]
169 if tmppart.get_type() == "extended":
170 for part_log in parts:
171 if part_log < (4 + FREE_MINOR_FRAC_LOG): continue
172 tmppart_log = self._partitions[part_log]
173 if tmppart_log.get_type() == "free":
174 if last_log_minor < last_log_free:
175 self._partitions[last_log_free].set_mb(self._partitions[last_log_free].get_mb()+tmppart_log.get_mb())
176 del self._partitions[part_log]
177 else:
178 if not last_log_free:
179 last_log_free = last_log_minor + FREE_MINOR_FRAC_LOG
180 else:
181 last_log_free = part_log
182 tmppart_log.set_minor(last_log_free)
183 self._partitions[last_log_free] = tmppart_log
184 if part_log != last_log_free: del self._partitions[part_log]
185 else:
186 if part_log > (last_log_minor + 1):
187 tmppart_log.set_minor(last_log_minor + 1)
188 last_log_minor = last_log_minor + 1
189 self._partitions[last_log_minor] = tmppart_log
190 del self._partitions[part_log]
191 else:
192 last_log_minor = part_log
193 elif tmppart.get_type() == "free":
194 if last_minor < last_free:
195 self._partitions[last_free].set_mb(self._partitions[last_free].get_mb()+tmppart.get_mb())
196 del self._partitions[part]
197 else:
198 if not last_free:
199 last_free = last_minor + FREE_MINOR_FRAC_PRI
200 else:
201 last_free = part
202 tmppart.set_minor(last_free)
203 self._partitions[last_free] = tmppart
204 if part != last_free: del self._partitions[part]
205 else:
206 if part > (last_minor + 1):
207 tmppart.set_minor(last_minor + 1)
208 last_minor = last_minor + 1
209 self._partitions[last_minor] = tmppart
210 del self._partitions[part]
211 else:
212 last_minor = part
213
214 ##
215 # Adds a new partition to the partition info
216 # @param free_minor minor of unallocated space partition is being created in
217 # @param mb size of partition in MB
218 # @param start Start sector (only used for existing partitions)
219 # @param end End sector (only used for existing partitions)
220 # @param type Partition type (ext2, ext3, fat32, linux-swap, free, extended, etc.)
221 # @param mountpoint='' Partition mountpoint
222 # @param mountopts='' Partition mount options
223 # @param mkfsopts='' Additional mkfs options
224 def add_partition(self, free_minor, mb, start, end, type, mountpoint='', mountopts='',mkfsopts=''):
225 if free_minor == -1:
226 tmpparts = self._partitions.keys()
227 tmpparts.sort()
228 tmpminor = 0
229 if len(tmpparts):
230 tmpminor = tmpparts[-1]
231 if archinfo[self._arch]['extended'] and tmpminor >= 5:
232 free_minor = tmpminor + FREE_MINOR_FRAC_LOG
233 else:
234 free_minor = tmpminor + FREE_MINOR_FRAC_PRI
235 self._partitions[free_minor] = Partition(self, free_minor, mb, 0, 0, "free")
236 new_minor = int(free_minor) + 1
237 if self._partitions.has_key(new_minor):
238 parts = self._partitions.keys()
239 parts.sort()
240 parts.reverse()
241 hole_at = 0
242 for i in range(1, parts[0]+1):
243 if i <= new_minor: continue
244 if not self._partitions.has_key(i):
245 hole_at = i
246 break
247 stopscooting = 0
248 for i in parts:
249 if stopscooting: break
250 if i >= hole_at and hole_at: continue
251 if i >= new_minor:
252 self._partitions[i].set_minor(i+1)
253 self._partitions[i+1] = self._partitions[i]
254 if i == new_minor: stopscooting = 1
255 if mb != self._partitions[free_minor].get_mb():
256 old_free_mb = self._partitions[free_minor].get_mb()
257 del self._partitions[free_minor]
258 if archinfo[self._arch]['extended'] and new_minor >= 5:
259 free_minor = new_minor + FREE_MINOR_FRAC_LOG
260 else:
261 free_minor = new_minor + FREE_MINOR_FRAC_PRI
262 self._partitions[free_minor] = Partition(self, free_minor, old_free_mb-mb, 0, 0, "free")
263 else:
264 del self._partitions[free_minor]
265 self._partitions[new_minor] = Partition(self, new_minor, mb, start, end, type, mountpoint=mountpoint, mountopts=mountopts,mkfsopts=mkfsopts)
266 if type == "extended":
267 self._partitions[4 + FREE_MINOR_FRAC_LOG] = Partition(self, (4 + FREE_MINOR_FRAC_LOG), mb, 0, 0, "free")
268 self.tidy_partitions()
269 return new_minor
270
271 ##
272 # Removes partition from partition info
273 # @param minor Minor of partition to remove
274 def remove_partition(self, minor):
275 tmppart = self._partitions[int(minor)]
276 free_minor = 0
277 if tmppart.is_logical():
278 free_minor = int(minor-1)+FREE_MINOR_FRAC_LOG
279 else:
280 free_minor = int(minor-1)+FREE_MINOR_FRAC_PRI
281 if free_minor in self._partitions:
282 self._partitions[free_minor].set_mb(self._partitions[free_minor].get_mb() + tmppart.get_mb())
283 else:
284 self._partitions[free_minor] = Partition(self, free_minor, tmppart.get_mb(), 0, 0, "free", format=False, existing=False)
285 del self._partitions[int(minor)]
286 self.tidy_partitions()
287
288 ##
289 # This function clears the partition table
290 def clear_partitions(self):
291 # parts = self._partitions.keys()
292 # parts.sort()
293 # parts.reverse()
294 # for part in parts:
295 # if not self._partitions[part].get_type() == "free":
296 # self.remove_partition(part)
297 self._partitions = { (0 + FREE_MINOR_FRAC_PRI): Partition(self, (0 + FREE_MINOR_FRAC_PRI), self.get_total_mb(), 0, 0, "free", format=False, existing=False) }
298
299 ##
300 # Returns an ordered list (disk order) of partition minors
301 def get_ordered_partition_list(self):
302 parts = self._partitions.keys()
303 parts.sort()
304 partlist = []
305 tmppart = None
306 for part in parts:
307 if archinfo[self._arch]['extended'] and part > (4 + FREE_MINOR_FRAC_PRI): break
308 tmppart = self._partitions[part]
309 partlist.append(part)
310 if tmppart.is_extended():
311 for part_log in parts:
312 if part_log < (4 + FREE_MINOR_FRAC_LOG): continue
313 partlist.append(part_log)
314 return partlist
315
316 ##
317 # Returns partition info in a format suitable for passing to install_profile.set_partition_tables()
318 def get_install_profile_structure(self):
319 devdic = {}
320 for part in self._partitions:
321 tmppart = self._partitions[part]
322 devdic[part] = { 'mb': tmppart.get_mb(), 'minor': float(part), 'origminor': tmppart.get_orig_minor(), 'type': tmppart.get_type(), 'mountpoint': tmppart.get_mountpoint(), 'mountopts': tmppart.get_mountopts(), 'format': tmppart.get_format(), 'mkfsopts': tmppart.get_mkfsopts(), 'start': 0, 'end': 0 }
323 return devdic
324
325 ##
326 # Returns the minor of the extended partition, if any
327 def get_extended_partition(self):
328 for part in self._partitions:
329 tmppart = self._partitions[part]
330 if tmppart.is_extended():
331 return part
332 return 0
333
334 ##
335 # Returns the drive model
336 def get_model(self):
337 if self._local_device:
338 return self._parted_dev.model
339 else:
340 return "Generic disk"
341
342 ##
343 # Sets the disklabel type
344 def set_disklabel(self, disklabel):
345 self._disklabel = disklabel
346
347 ##
348 # Returns the disklabel type
349 def get_disklabel(self):
350 return self._disklabel
351
352 ##
353 # Returns the number of sectors on the device
354 def get_num_sectors(self):
355 return long(self._total_sectors)
356
357 ##
358 # Returns the size of a cylinder in bytes
359 def get_cylinder_size(self):
360 return long(self._cylinder_bytes)
361
362 ##
363 # Returns the size of a sector in bytes
364 def get_sector_size(self):
365 return long(self._sector_bytes)
366
367 ##
368 # Returns the number of cylinders
369 def get_num_cylinders(self):
370 return long(self._geometry['cylinders'])
371
372 ##
373 # Returns the total number of bytes on the device
374 def get_drive_bytes(self):
375 return long(self._total_bytes)
376
377 ##
378 # Returns the total number of MB on the device
379 def get_total_mb(self):
380 if self._local_device:
381 return self._total_mb
382 else:
383 total_mb = 0
384 for tmppart in self._partitions:
385 total_mb += self._partitions[tmppart].get_mb()
386 return total_mb
387
388 ##
389 # Returns partition info dictionary
390 def get_partitions(self):
391 return self._partitions
392
393 ##
394 # Prints disk geometry to STDOUT (no longer used)
395 def print_geometry(self):
396 print self._total_bytes, self._geometry
397
398 ##
399 # This class represents a partition within a GLIStorageDevice object
400 class Partition:
401 "Class representing a single partition within a Device object"
402
403 _device = None
404 _minor = 0
405 _orig_minor = 0
406 _start = 0
407 _end = 0
408 _type = None
409 _mountpoint = None
410 _mountopts = None
411 _format = None
412 _resizeable = None
413 _min_mb_for_resize = 0
414 _mb = 0
415 _mkfsopts = None
416
417 ##
418 # Initialization function for the Partition class
419 # @param device Parent GLIStorageDevice object
420 # @param minor Minor of partition
421 # @param mb Parameter Size of partition in MB
422 # @param start Parameter Start sector of partition
423 # @param end Parameter Start sector of partition
424 # @param type Parameter Type of partition (ext2, ext3, fat32, linux-swap, free, extended, etc.)
425 # @param mountpoint='' Mountpoint of partition
426 # @param mountopts='' Mount options of partition
427 # @param mkfsopts='' Additional mkfs options
428 # @param format=True Format partition
429 # @param existing=False This partition exists on disk
430 def __init__(self, device, minor, mb, start, end, type, mountpoint='', mountopts='', format=True, existing=False, origminor=0, mkfsopts=''):
431 self._device = device
432 self._minor = float(minor)
433 self._start = long(start)
434 self._end = long(end)
435 self._type = type or "unknown"
436 self._mountpoint = mountpoint
437 self._mountopts = mountopts
438 self._format = format
439 self._mb = mb
440 self._orig_minor = origminor
441 self._mkfsopts = mkfsopts
442 self._resizeable = False
443 if type != "free":
444 if existing and not origminor:
445 self._orig_minor = self._minor
446 self._minor = int(self._minor)
447 self._orig_minor = int(self._orig_minor)
448 if existing:
449 try:
450 parted_part = device._parted_disk.get_partition(self._orig_minor)
451 label_type = device._parted_disk.type.name
452 if label_type == "loop":
453 dev_node = device._device
454 else:
455 dev_node = device._device + str(self._orig_minor)
456 # print "dev_node = " + dev_node
457 if type == "ntfs":
458 min_bytes = long(commands.getoutput("ntfsresize -f --info " + dev_node + " | grep -e '^You might resize' | sed -e 's/You might resize at //' -e 's/ bytes or .\+//'"))
459 self._min_mb_for_resize = long(min_bytes / MEGABYTE) + 1
460 self._resizeable = True
461 elif type == "ext2" or type == "ext3":
462 block_size = long(string.strip(commands.getoutput("dumpe2fs -h " + dev_node + r" 2>&1 | grep -e '^Block size:' | sed -e 's/^Block size:\s\+//'")))
463 free_blocks = long(string.strip(commands.getoutput("dumpe2fs -h " + dev_node + r" 2>&1 | grep -e '^Free blocks:' | sed -e 's/^Free blocks:\s\+//'")))
464 free_bytes = long(block_size * free_blocks)
465 # can't hurt to pad (the +50) it a bit since this is really just a guess
466 self._min_mb_for_resize = self._mb - long(free_bytes / MEGABYTE) + 50
467 self._resizeable = True
468 else:
469 parted_part = self._device._parted_disk.get_partition(int(self._orig_minor))
470 parted_fs = parted_part.geom.file_system_open()
471 resize_constraint = parted_fs.get_resize_constraint()
472 min_bytes = resize_constraint.min_size * self._device._sector_bytes
473 self._min_mb_for_resize = long(min_bytes / MEGABYTE) + 1
474 self._resizeable = True
475 except:
476 self._resizeable = False
477
478 ##
479 # Returns whether or not the partition is extended
480 def is_extended(self):
481 if self._type == "extended":
482 return True
483 else:
484 return False
485
486 ##
487 # Returns whether or not the partition is logical
488 def is_logical(self):
489 if self._type == "free":
490 if int(self._minor) + FREE_MINOR_FRAC_LOG == self._minor:
491 return True
492 else:
493 return False
494 elif archinfo[self._device._arch]['extended'] and self._minor > 4:
495 return True
496 else:
497 return False
498
499 ##
500 # Returns a list of logical partitions if this is an extended partition
501 def get_logicals(self):
502 if not self.is_extended():
503 return None
504 logicals = []
505 parts = self._device._partitions.keys()
506 parts.sort()
507 for part in parts:
508 if part < 5: continue
509 logicals.append(part)
510 logicals.sort()
511 return logicals
512
513 ##
514 # Returns the extened parent partition if this is a logical partition (no longer used)
515 def get_extended_parent(self):
516 if not self.is_logical():
517 return None
518 else:
519 return self._device.get_partition_at(self._start, ignore_extended=0)
520
521 ##
522 # Sets the options passed to mkfs
523 # @param mkfsopts Options passed to mkfs
524 def set_mkfsopts(self, mkfsopts):
525 self._mkfsopts = mkfsopts
526
527 ##
528 # Returns the options passes to mkfs
529 def get_mkfsopts(self):
530 return self._mkfsopts
531
532 ##
533 # Sets the start sector for the partition
534 # @param start Start sector
535 def set_start(self, start):
536 self._start = long(start)
537
538 ##
539 # Returns the start sector for the partition
540 def get_start(self):
541 return long(self._start)
542
543 ##
544 # Sets the end sector of the partition
545 # @param end End sector
546 def set_end(self, end):
547 self._end = long(end)
548
549 ##
550 # Returns end sector for the partition
551 def get_end(self):
552 return long(self._end)
553
554 ##
555 # Returns size of partition in MB
556 def get_mb(self):
557 return long(self._mb)
558
559 ##
560 # Sets size of partition in MB
561 # @param mb Parameter description
562 def set_mb(self, mb):
563 self._mb = long(mb)
564
565 ##
566 # Sets type of partition
567 # @param type Parameter description
568 def set_type(self, type):
569 self._type = type
570
571 ##
572 # Returns type of partition
573 def get_type(self):
574 return self._type
575
576 ##
577 # Returns parent GLIStorageDevice object
578 def get_device(self):
579 return self._device
580
581 ##
582 # Sets minor of partition
583 # @param minor New minor
584 def set_minor(self, minor):
585 self._minor = float(minor)
586
587 ##
588 # Returns minor of partition
589 def get_minor(self):
590 return float(self._minor)
591
592 ##
593 # Sets the original minor of the partition
594 # @param orig_minor Parameter description
595 def set_orig_minor(self, orig_minor):
596 self._orig_minor = int(orig_minor)
597
598 ##
599 # Returns the original minor of the partition
600 def get_orig_minor(self):
601 return self._orig_minor
602
603 ##
604 # Sets the mountpoint for the partition
605 # @param mountpoint Mountpoint
606 def set_mountpoint(self, mountpoint):
607 self._mountpoint = mountpoint
608
609 ##
610 # Returns the mountpoint for the partition
611 def get_mountpoint(self):
612 return self._mountpoint
613
614 ##
615 # Sets the mount options for the partition
616 # @param mountopts Mount options
617 def set_mountopts(self, mountopts):
618 self._mountopts = mountopts
619
620 ##
621 # Returns the mount options for the partition
622 def get_mountopts(self):
623 return self._mountopts
624
625 ##
626 # Set whether to format the partition
627 # @param format Format this partition (True/False)
628 def set_format(self, format):
629 self._format = format
630
631 ##
632 # Returns whether to format the partition
633 def get_format(self):
634 return self._format
635
636 ##
637 # Returns whether the partition is resizeable
638 def is_resizeable(self):
639 return self._resizeable
640
641 ##
642 # Returns minimum MB for resize
643 def get_min_mb_for_resize(self):
644 # if self.is_extended():
645 # min_size = self._start
646 # for part in self._device._partitions:
647 # if part < 5: continue
648 # if part.get_end > min_size: min_size = part.get_end()
649 # return min_size
650 # else:
651 if self._resizeable:
652 return self._min_mb_for_resize
653 else:
654 return -1
655
656 ##
657 # Returns maximum MB for resize
658 def get_max_mb_for_resize(self):
659 if self._resizeable:
660 free_minor = 0
661 if self.is_logical():
662 free_minor = self._minor + FREE_MINOR_FRAC_LOG
663 else:
664 free_minor = self._minor + FREE_MINOR_FRAC_PRI
665 if free_minor in self._device._partitions:
666 return self._mb + self._device._partitions[free_minor]._mb
667 else:
668 return self._mb
669 else:
670 return -1
671
672 ##
673 # Resizes the partition
674 # @param mb New size in MB
675 def resize(self, mb):
676 free_minor = self._minor
677 if self.is_logical():
678 free_minor += FREE_MINOR_FRAC_LOG
679 else:
680 free_minor += FREE_MINOR_FRAC_PRI
681 if mb < self._mb:
682 # Shrinking
683 if not free_minor in self._device._partitions:
684 self._device._partitions[free_minor] = Partition(self._device, free_minor, 0, 0, 0, "free", format=False, existing=False)
685 self._device._partitions[free_minor]._mb += self._mb - mb
686 self._mb = mb
687 elif mb == self._mb + self._device._partitions[free_minor]._mb:
688 # Using all available unallocated space
689 del self._device._partitions[free_minor]
690 self._mb = mb
691 elif mb > self._mb:
692 # Growing
693 self._device._partitions[free_minor]._mb = mb - self._mb
694 self._mb = mb
695
696 ##
697 # Returns a list of detected partitionable devices
698 def detect_devices():
699 devices = []
700
701 # Make sure sysfs exists
702 # TODO: rewrite for 2.4 support
703 if not os.path.exists("/sys/bus"):
704 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "no sysfs found (you MUST use a kernel >2.6)")
705 # Make sure /proc/partitions exists
706 if not os.path.exists("/proc/partitions"):
707 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "/proc/partitions does not exist! Please make sure procfs is in your kernel and mounted!")
708
709 # Load /proc/partitions into the variable 'partitions'
710 partitions = []
711 for line in open("/proc/partitions"):
712 if len(line.split()) < 4 or not line.split()[0].isdigit() or not line.split()[1].isdigit():
713 continue
714
715 # Get the major, minor and device name
716 major = line.split()[0]
717 minor = line.split()[1]
718 device = "/dev/" + line.split()[3]
719
720 if not major.isdigit() or not minor.isdigit():
721 continue
722
723 major = int(major)
724 minor = int(minor)
725
726 # If there is no /dev/'device_name', then scan
727 # all the devices in /dev to try and find a
728 # devices with the same major and minor
729 if not os.path.exists(device):
730 device = None
731 for path, dirs, files in os.walk("/dev"):
732 for d_file in files:
733 full_file = os.path.join(path, d_file)
734 if not os.path.exists(full_file):
735 continue
736 statres = os.stat(full_file)
737 fmaj = os.major(statres.st_rdev)
738 fmin = os.minor(statres.st_rdev)
739 if fmaj == major and fmin == minor:
740 device = full_file
741 break
742 if not device:
743 continue
744
745 partitions.append(( major, minor, device ))
746
747 # Scan sysfs for the devices of type 'x'
748 # 'x' being a member of the list below:
749 # TODO: rewrite for 2.4 support
750 for dev_type in [ "ide", "scsi" ]: # Other device types? usb? fw?
751 if os.path.exists("/sys/bus/" + dev_type):
752 sysfs_devices = os.listdir("/sys/bus/"+dev_type+"/devices")
753
754 # For each device in the devices on that bus
755 for sysfs_device in sysfs_devices:
756 dev_file = "/sys/bus/" + dev_type + "/devices/" + sysfs_device + "/block/dev"
757
758 # If the file is not a block device, loop
759 if not os.path.exists(dev_file):
760 continue
761
762 # Get the major and minor info
763 try:
764 major, minor = open(dev_file).read().split(":")
765 major = int(major)
766 minor = int(minor)
767 except:
768 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "invalid major minor in " + dev_file)
769
770 # Find a device listed in /proc/partitions
771 # that has the same minor and major as our
772 # current block device.
773 for record in partitions:
774 if major == record[0] and minor == record[1]:
775 devices.append(record[2])
776
777 # For testing the partitioning code
778 if GLIUtility.is_file("/tmp/disk.img"):
779 devices.append("/tmp/disk.img")
780
781 # We have assembled the list of devices, so return it
782 return devices

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