/[gli]/trunk/src/GLIStorageDevice.py
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Mon Jan 23 00:56:58 2006 UTC (14 years, 9 months ago) by agaffney
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  src/GLIStorageDevice.py:
  initial support for %
if this breaks partitioning, blame codeman...he wanted this :)

1 codeman 851 # 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 agaffney 535 import commands, string, os, parted
7 agaffney 556 from GLIException import *
8 agaffney 595 import GLIUtility
9 agaffney 107
10 agaffney 492 MEGABYTE = 1024 * 1024
11    
12 agaffney 639 # 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 agaffney 497 archinfo = { 'sparc': { 'fixedparts': [ { 'minor': 3, 'type': "wholedisk" } ], 'disklabel': 'sun', 'extended': False },
18 agaffney 912 'hppa': { 'fixedparts': [ { 'minor': 1, 'type': "palo" } ], 'disklabel': 'msdos', 'extended': True },
19 agaffney 497 'x86': { 'fixedparts': [], 'disklabel': 'msdos', 'extended': True },
20 agaffney 595 'amd64': { 'fixedparts': [], 'disklabel': 'msdos', 'extended': True },
21 agaffney 497 'ppc': { 'fixedparts': [ { 'minor': 1, 'type': "metadata" } ], 'disklabel': 'mac', 'extended': False }
22     }
23    
24 agaffney 513 ##
25     # This class provides a partitioning abstraction for the frontends
26 agaffney 107 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 agaffney 212 _sector_bytes = 0
39 agaffney 492 _total_mb = 0
40     _arch = None
41 agaffney 595 _disklabel = None
42 agaffney 492
43 agaffney 509 ##
44 agaffney 513 # 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 agaffney 1258 def __init__(self, device, arch="x86", set_geometry=True, local_device=True):
48 agaffney 107 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 agaffney 492 self._arch = arch
54 agaffney 1037 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 agaffney 1038 self._disklabel = self._parted_disk.type.name
62     else:
63     self._disklabel = archinfo[self._arch]['disklabel']
64 agaffney 596 if set_geometry:
65     self.set_disk_geometry_from_disk()
66 agaffney 107
67 agaffney 509 ##
68 agaffney 513 # Sets disk geometry info from disk. This function is used internally by __init__()
69 agaffney 107 def set_disk_geometry_from_disk(self):
70     self._total_bytes = self._parted_dev.length * self._parted_dev.sector_size
71 agaffney 205 self._geometry['heads'], self._geometry['sectors'], self._geometry['cylinders'] = self._parted_dev.heads, self._parted_dev.sectors, self._parted_dev.cylinders
72 agaffney 212 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 agaffney 107 self._sectors_in_cylinder = self._geometry['heads'] * self._geometry['sectors']
76 agaffney 635 self._total_mb = long(self._total_bytes / MEGABYTE)
77 agaffney 107
78 agaffney 509 ##
79 agaffney 513 # Sets partition info from disk.
80 agaffney 107 def set_partitions_from_disk(self):
81 agaffney 492 last_part = 0
82     last_log_part = 4
83 agaffney 107 parted_part = self._parted_disk.next_partition()
84 agaffney 492 while parted_part:
85 agaffney 635 part_mb = long((parted_part.geom.end - parted_part.geom.start + 1) * self._sector_bytes / MEGABYTE)
86 agaffney 1258 # Ignore metadata "partitions"...this will need to be changed for non-x86
87 agaffney 492 if parted_part.num >= 1:
88 agaffney 113 fs_type = ""
89     if parted_part.fs_type != None: fs_type = parted_part.fs_type.name
90     if parted_part.type == 2: fs_type = "extended"
91 agaffney 501 if archinfo[self._arch]['extended'] and parted_part.num > 4:
92     last_log_part = parted_part.num
93     else:
94     last_part = parted_part.num
95 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)
96     elif parted_part.type_name == "free":
97 agaffney 668 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():
98 agaffney 639 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)
99 agaffney 492 last_log_part += 1
100     else:
101 agaffney 639 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)
102 agaffney 492 last_part += 1
103     parted_part = self._parted_disk.next_partition(parted_part)
104 agaffney 107
105 agaffney 509 ##
106 agaffney 639 # Imports partition info from the install profile partition structure
107 agaffney 513 # @param ips Parameter structure returned from install_profile.get_partition_tables()
108 agaffney 492 def set_partitions_from_install_profile_structure(self, ips):
109 agaffney 596 for part in ips:
110     tmppart = ips[part]
111     existing = False
112     if tmppart['origminor'] and not tmppart['format']:
113     existing = True
114 agaffney 632 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'])
115 agaffney 492
116 agaffney 509 ##
117 agaffney 513 # Returns name of device (e.g. /dev/hda) being represented
118 agaffney 107 def get_device(self):
119     return self._device
120    
121 agaffney 509 ##
122 agaffney 1258 # Returns whether the device is local or not
123     def is_local(self):
124     return self._local_device
125    
126     ##
127 agaffney 912 # Uses magic to apply the recommended partition layout
128     def do_recommended(self):
129     free_minor = 0
130 agaffney 924 recommended_parts = [ { 'type': "ext2", 'size': 100, 'mountpoint': "/boot" },
131     { 'type': "linux-swap", 'size': 512, 'mountpoint': "" },
132 agaffney 916 { 'type': "ext3", 'size': "*", 'mountpoint': "/" } ]
133     to_create = []
134 agaffney 925 physical_memory = int(GLIUtility.spawn(r"free -m | egrep '^Mem:' | sed -e 's/^Mem: \+//' -e 's/ \+.\+$//'", return_output=True)[1].strip())
135 agaffney 916 parts = self.get_ordered_partition_list()
136 agaffney 1258 # Search for concurrent unallocated space >=4GB
137 agaffney 912 for part in parts:
138     if self._partitions[part].get_type() == "free" and self._partitions[part].get_mb() >= 4096:
139     free_minor = part
140 agaffney 916 break
141 agaffney 912 if not free_minor:
142     raise GLIException("RecommendedPartitionLayoutError", "notice", "do_recommended", "You do not have atleast 4GB of concurrent unallocated space. Please remove some partitions and try again.")
143 agaffney 916 remaining_free = self._partitions[free_minor].get_mb()
144     for newpart in recommended_parts:
145 agaffney 1258 # extended/logical partitions suck like a hoover
146 agaffney 923 if archinfo[self._arch]['extended'] and free_minor == (3 + FREE_MINOR_FRAC_PRI) and not newpart == recommended_parts[-1]:
147 agaffney 916 if self.get_extended_partition():
148     raise GLIException("RecommendedPartitionLayoutError", "notice", "do_recommended", "This code is not yet robust enough to handle automatic partitioning with your current layout.")
149     to_create.append({ 'type': "extended", 'size': remaining_free, 'mountpoint': "", 'free_minor': free_minor })
150     free_minor = 4 + FREE_MINOR_FRAC_LOG
151     newpart['free_minor'] = free_minor
152 agaffney 1258 # Small hack to calculate optimal swap partition size
153 agaffney 926 if newpart['type'] == "linux-swap" and physical_memory and physical_memory < 1024:
154 agaffney 925 newpart['size'] = physical_memory * 2
155 agaffney 916 to_create.append(newpart)
156     free_minor = free_minor + 1
157     if not newpart['size'] == "*":
158     remaining_free = remaining_free - newpart['size']
159     for newpart in to_create:
160     if newpart['size'] == "*":
161 agaffney 1258 # This doesn't seem quite right...it should probably be set to remaining_free
162 agaffney 916 newpart['size'] = self._partitions[newpart['free_minor']].get_mb()
163     self.add_partition(newpart['free_minor'], newpart['size'], 0, 0, newpart['type'], mountpoint=newpart['mountpoint'])
164 agaffney 912
165     ##
166 agaffney 513 # Combines free space and closes gaps in minor numbers. This is used internally
167 agaffney 494 def tidy_partitions(self):
168     last_minor = 0
169     last_log_minor = 4
170     last_free = 0
171     last_log_free = 0
172     parts = self._partitions.keys()
173     parts.sort()
174     for part in parts:
175 agaffney 1095 if archinfo[self._arch]['extended'] and part > (4 + FREE_MINOR_FRAC_PRI): break
176 agaffney 494 tmppart = self._partitions[part]
177     if tmppart.get_type() == "extended":
178     for part_log in parts:
179 agaffney 639 if part_log < (4 + FREE_MINOR_FRAC_LOG): continue
180 agaffney 494 tmppart_log = self._partitions[part_log]
181     if tmppart_log.get_type() == "free":
182 agaffney 495 if last_log_minor < last_log_free:
183     self._partitions[last_log_free].set_mb(self._partitions[last_log_free].get_mb()+tmppart_log.get_mb())
184     del self._partitions[part_log]
185 agaffney 494 else:
186 agaffney 495 if not last_log_free:
187 agaffney 639 last_log_free = last_log_minor + FREE_MINOR_FRAC_LOG
188 agaffney 544 else:
189 agaffney 627 last_log_free = part_log
190 agaffney 495 tmppart_log.set_minor(last_log_free)
191     self._partitions[last_log_free] = tmppart_log
192     if part_log != last_log_free: del self._partitions[part_log]
193 agaffney 494 else:
194     if part_log > (last_log_minor + 1):
195     tmppart_log.set_minor(last_log_minor + 1)
196 agaffney 495 last_log_minor = last_log_minor + 1
197     self._partitions[last_log_minor] = tmppart_log
198     del self._partitions[part_log]
199 agaffney 544 else:
200     last_log_minor = part_log
201 agaffney 627 elif tmppart.get_type() == "free":
202 agaffney 495 if last_minor < last_free:
203     self._partitions[last_free].set_mb(self._partitions[last_free].get_mb()+tmppart.get_mb())
204     del self._partitions[part]
205 agaffney 494 else:
206 agaffney 495 if not last_free:
207 agaffney 639 last_free = last_minor + FREE_MINOR_FRAC_PRI
208 agaffney 544 else:
209     last_free = part
210 agaffney 495 tmppart.set_minor(last_free)
211     self._partitions[last_free] = tmppart
212     if part != last_free: del self._partitions[part]
213 agaffney 494 else:
214     if part > (last_minor + 1):
215     tmppart.set_minor(last_minor + 1)
216 agaffney 495 last_minor = last_minor + 1
217     self._partitions[last_minor] = tmppart
218     del self._partitions[part]
219 agaffney 544 else:
220     last_minor = part
221 agaffney 494
222 agaffney 509 ##
223 agaffney 513 # Adds a new partition to the partition info
224     # @param free_minor minor of unallocated space partition is being created in
225     # @param mb size of partition in MB
226     # @param start Start sector (only used for existing partitions)
227     # @param end End sector (only used for existing partitions)
228     # @param type Partition type (ext2, ext3, fat32, linux-swap, free, extended, etc.)
229     # @param mountpoint='' Partition mountpoint
230     # @param mountopts='' Partition mount options
231 agaffney 635 # @param mkfsopts='' Additional mkfs options
232     def add_partition(self, free_minor, mb, start, end, type, mountpoint='', mountopts='',mkfsopts=''):
233 agaffney 1258 # Automatically pick the first unused minor if not a local device
234     if not self._local_device or free_minor == -1:
235 agaffney 1037 tmpparts = self._partitions.keys()
236     tmpparts.sort()
237 agaffney 1040 tmpminor = 0
238     if len(tmpparts):
239     tmpminor = tmpparts[-1]
240 agaffney 1037 if archinfo[self._arch]['extended'] and tmpminor >= 5:
241 agaffney 1040 free_minor = tmpminor + FREE_MINOR_FRAC_LOG
242 agaffney 1037 else:
243 agaffney 1040 free_minor = tmpminor + FREE_MINOR_FRAC_PRI
244 agaffney 1037 self._partitions[free_minor] = Partition(self, free_minor, mb, 0, 0, "free")
245 agaffney 492 new_minor = int(free_minor) + 1
246 agaffney 1258 if self._local_device:
247     # Check to see if the new minor we picked already exists. If it does, scoot all partitions from
248     # that one on down a minor
249     if self._partitions.has_key(new_minor):
250     parts = self._partitions.keys()
251     parts.sort()
252     parts.reverse()
253     hole_at = 0
254     for i in range(1, parts[0]+1):
255     if i <= new_minor: continue
256     if not self._partitions.has_key(i):
257     hole_at = i
258     break
259     stopscooting = 0
260     for i in parts:
261     if stopscooting: break
262     if i >= hole_at and hole_at: continue
263     if i >= new_minor:
264     self._partitions[i].set_minor(i+1)
265     self._partitions[i+1] = self._partitions[i]
266     if i == new_minor: stopscooting = 1
267     # If the size specified for the new partition is less than the size of the unallocated space that it
268     # is getting placed into, a new partition to represent the remaining unallocated space needs to be
269     # created.
270     if mb != self._partitions[free_minor].get_mb():
271     old_free_mb = self._partitions[free_minor].get_mb()
272     del self._partitions[free_minor]
273     if archinfo[self._arch]['extended'] and new_minor >= 5:
274     free_minor = new_minor + FREE_MINOR_FRAC_LOG
275     else:
276     free_minor = new_minor + FREE_MINOR_FRAC_PRI
277     self._partitions[free_minor] = Partition(self, free_minor, old_free_mb-mb, 0, 0, "free")
278 agaffney 494 else:
279 agaffney 1258 del self._partitions[free_minor]
280 agaffney 635 self._partitions[new_minor] = Partition(self, new_minor, mb, start, end, type, mountpoint=mountpoint, mountopts=mountopts,mkfsopts=mkfsopts)
281 agaffney 1258 # When we create an extended partition, we have to create the partition to represent the unallocated
282     # space inside of the extended partition
283 agaffney 494 if type == "extended":
284 agaffney 639 self._partitions[4 + FREE_MINOR_FRAC_LOG] = Partition(self, (4 + FREE_MINOR_FRAC_LOG), mb, 0, 0, "free")
285 agaffney 494 self.tidy_partitions()
286 agaffney 1040 return new_minor
287 agaffney 107
288 agaffney 509 ##
289 agaffney 513 # Removes partition from partition info
290     # @param minor Minor of partition to remove
291 agaffney 107 def remove_partition(self, minor):
292 agaffney 492 tmppart = self._partitions[int(minor)]
293     free_minor = 0
294     if tmppart.is_logical():
295 agaffney 639 free_minor = int(minor-1)+FREE_MINOR_FRAC_LOG
296 agaffney 492 else:
297 agaffney 639 free_minor = int(minor-1)+FREE_MINOR_FRAC_PRI
298     if free_minor in self._partitions:
299     self._partitions[free_minor].set_mb(self._partitions[free_minor].get_mb() + tmppart.get_mb())
300     else:
301     self._partitions[free_minor] = Partition(self, free_minor, tmppart.get_mb(), 0, 0, "free", format=False, existing=False)
302 agaffney 107 del self._partitions[int(minor)]
303 agaffney 494 self.tidy_partitions()
304 agaffney 107
305 agaffney 509 ##
306 agaffney 923 # This function clears the partition table
307     def clear_partitions(self):
308     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) }
309    
310     ##
311 agaffney 513 # Returns an ordered list (disk order) of partition minors
312 agaffney 107 def get_ordered_partition_list(self):
313 codeman 625 parts = self._partitions.keys()
314     parts.sort()
315     partlist = []
316 agaffney 492 tmppart = None
317     for part in parts:
318 agaffney 639 if archinfo[self._arch]['extended'] and part > (4 + FREE_MINOR_FRAC_PRI): break
319 agaffney 107 tmppart = self._partitions[part]
320 agaffney 492 partlist.append(part)
321 agaffney 107 if tmppart.is_extended():
322     for part_log in parts:
323 agaffney 639 if part_log < (4 + FREE_MINOR_FRAC_LOG): continue
324 agaffney 492 partlist.append(part_log)
325 agaffney 107 return partlist
326    
327 agaffney 509 ##
328 agaffney 513 # Returns partition info in a format suitable for passing to install_profile.set_partition_tables()
329 agaffney 107 def get_install_profile_structure(self):
330     devdic = {}
331     for part in self._partitions:
332     tmppart = self._partitions[part]
333 agaffney 635 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 }
334 agaffney 107 return devdic
335    
336 agaffney 509 ##
337 agaffney 513 # Returns the minor of the extended partition, if any
338 agaffney 183 def get_extended_partition(self):
339     for part in self._partitions:
340     tmppart = self._partitions[part]
341     if tmppart.is_extended():
342     return part
343 agaffney 184 return 0
344 agaffney 183
345 agaffney 509 ##
346 agaffney 624 # Returns the drive model
347     def get_model(self):
348 agaffney 1038 if self._local_device:
349     return self._parted_dev.model
350     else:
351     return "Generic disk"
352 agaffney 624
353     ##
354 agaffney 596 # Sets the disklabel type
355     def set_disklabel(self, disklabel):
356     self._disklabel = disklabel
357    
358     ##
359     # Returns the disklabel type
360     def get_disklabel(self):
361     return self._disklabel
362    
363     ##
364 agaffney 513 # Returns the number of sectors on the device
365 agaffney 107 def get_num_sectors(self):
366 agaffney 635 return long(self._total_sectors)
367 agaffney 107
368 agaffney 509 ##
369 agaffney 513 # Returns the size of a cylinder in bytes
370 agaffney 107 def get_cylinder_size(self):
371 agaffney 635 return long(self._cylinder_bytes)
372 agaffney 107
373 agaffney 509 ##
374 agaffney 513 # Returns the size of a sector in bytes
375 agaffney 212 def get_sector_size(self):
376 agaffney 635 return long(self._sector_bytes)
377 agaffney 212
378 agaffney 509 ##
379 agaffney 513 # Returns the number of cylinders
380 agaffney 107 def get_num_cylinders(self):
381 agaffney 635 return long(self._geometry['cylinders'])
382 agaffney 107
383 agaffney 509 ##
384 agaffney 513 # Returns the total number of bytes on the device
385 agaffney 107 def get_drive_bytes(self):
386 agaffney 635 return long(self._total_bytes)
387 agaffney 107
388 agaffney 509 ##
389 agaffney 513 # Returns the total number of MB on the device
390 agaffney 492 def get_total_mb(self):
391 agaffney 1037 if self._local_device:
392     return self._total_mb
393     else:
394     total_mb = 0
395     for tmppart in self._partitions:
396 agaffney 1046 total_mb += self._partitions[tmppart].get_mb()
397 agaffney 1037 return total_mb
398 agaffney 492
399 agaffney 509 ##
400 agaffney 513 # Returns partition info dictionary
401 agaffney 107 def get_partitions(self):
402     return self._partitions
403    
404 agaffney 509 ##
405 agaffney 513 # Prints disk geometry to STDOUT (no longer used)
406 agaffney 107 def print_geometry(self):
407     print self._total_bytes, self._geometry
408    
409 agaffney 513 ##
410     # This class represents a partition within a GLIStorageDevice object
411 agaffney 107 class Partition:
412     "Class representing a single partition within a Device object"
413    
414     _device = None
415 agaffney 492 _minor = 0
416     _orig_minor = 0
417     _start = 0
418     _end = 0
419 agaffney 107 _type = None
420     _mountpoint = None
421     _mountopts = None
422     _format = None
423     _resizeable = None
424 agaffney 523 _min_mb_for_resize = 0
425 agaffney 1258 _mb = ""
426 agaffney 631 _mkfsopts = None
427 agaffney 107
428 agaffney 509 ##
429 agaffney 514 # Initialization function for the Partition class
430     # @param device Parent GLIStorageDevice object
431     # @param minor Minor of partition
432     # @param mb Parameter Size of partition in MB
433     # @param start Parameter Start sector of partition
434     # @param end Parameter Start sector of partition
435     # @param type Parameter Type of partition (ext2, ext3, fat32, linux-swap, free, extended, etc.)
436     # @param mountpoint='' Mountpoint of partition
437     # @param mountopts='' Mount options of partition
438 agaffney 635 # @param mkfsopts='' Additional mkfs options
439 agaffney 514 # @param format=True Format partition
440     # @param existing=False This partition exists on disk
441 agaffney 631 def __init__(self, device, minor, mb, start, end, type, mountpoint='', mountopts='', format=True, existing=False, origminor=0, mkfsopts=''):
442 agaffney 107 self._device = device
443 agaffney 492 self._minor = float(minor)
444 agaffney 635 self._start = long(start)
445     self._end = long(end)
446 agaffney 492 self._type = type or "unknown"
447 agaffney 107 self._mountpoint = mountpoint
448     self._mountopts = mountopts
449     self._format = format
450 agaffney 492 self._mb = mb
451 agaffney 596 self._orig_minor = origminor
452 agaffney 631 self._mkfsopts = mkfsopts
453 agaffney 1093 self._resizeable = False
454 agaffney 596 if type != "free":
455     if existing and not origminor:
456     self._orig_minor = self._minor
457     self._minor = int(self._minor)
458     self._orig_minor = int(self._orig_minor)
459 agaffney 231 if existing:
460 agaffney 826 try:
461     parted_part = device._parted_disk.get_partition(self._orig_minor)
462     label_type = device._parted_disk.type.name
463     if label_type == "loop":
464     dev_node = device._device
465     else:
466     dev_node = device._device + str(self._orig_minor)
467     # print "dev_node = " + dev_node
468     if type == "ntfs":
469     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 .\+//'"))
470     self._min_mb_for_resize = long(min_bytes / MEGABYTE) + 1
471     self._resizeable = True
472     elif type == "ext2" or type == "ext3":
473     block_size = long(string.strip(commands.getoutput("dumpe2fs -h " + dev_node + r" 2>&1 | grep -e '^Block size:' | sed -e 's/^Block size:\s\+//'")))
474     free_blocks = long(string.strip(commands.getoutput("dumpe2fs -h " + dev_node + r" 2>&1 | grep -e '^Free blocks:' | sed -e 's/^Free blocks:\s\+//'")))
475     free_bytes = long(block_size * free_blocks)
476     # can't hurt to pad (the +50) it a bit since this is really just a guess
477     self._min_mb_for_resize = self._mb - long(free_bytes / MEGABYTE) + 50
478     self._resizeable = True
479     else:
480     parted_part = self._device._parted_disk.get_partition(int(self._orig_minor))
481 agaffney 301 parted_fs = parted_part.geom.file_system_open()
482 agaffney 826 resize_constraint = parted_fs.get_resize_constraint()
483     min_bytes = resize_constraint.min_size * self._device._sector_bytes
484     self._min_mb_for_resize = long(min_bytes / MEGABYTE) + 1
485     self._resizeable = True
486     except:
487     self._resizeable = False
488 agaffney 107
489 agaffney 509 ##
490 agaffney 514 # Returns whether or not the partition is extended
491 agaffney 107 def is_extended(self):
492     if self._type == "extended":
493     return True
494     else:
495     return False
496    
497 agaffney 509 ##
498 agaffney 514 # Returns whether or not the partition is logical
499 agaffney 107 def is_logical(self):
500 agaffney 492 if self._type == "free":
501 agaffney 639 if int(self._minor) + FREE_MINOR_FRAC_LOG == self._minor:
502 agaffney 492 return True
503     else:
504     return False
505 agaffney 497 elif archinfo[self._device._arch]['extended'] and self._minor > 4:
506 agaffney 107 return True
507 agaffney 492 else:
508     return False
509 agaffney 107
510 agaffney 509 ##
511 agaffney 514 # Returns a list of logical partitions if this is an extended partition
512 agaffney 107 def get_logicals(self):
513 agaffney 184 if not self.is_extended():
514     return None
515 agaffney 107 logicals = []
516 agaffney 184 parts = self._device._partitions.keys()
517     parts.sort()
518     for part in parts:
519     if part < 5: continue
520 agaffney 107 logicals.append(part)
521     logicals.sort()
522     return logicals
523    
524 agaffney 509 ##
525 agaffney 514 # Returns the extened parent partition if this is a logical partition (no longer used)
526 agaffney 107 def get_extended_parent(self):
527 agaffney 184 if not self.is_logical():
528     return None
529     else:
530     return self._device.get_partition_at(self._start, ignore_extended=0)
531 agaffney 107
532 agaffney 509 ##
533 agaffney 631 # Sets the options passed to mkfs
534     # @param mkfsopts Options passed to mkfs
535     def set_mkfsopts(self, mkfsopts):
536     self._mkfsopts = mkfsopts
537    
538     ##
539     # Returns the options passes to mkfs
540     def get_mkfsopts(self):
541     return self._mkfsopts
542    
543     ##
544 agaffney 514 # Sets the start sector for the partition
545     # @param start Start sector
546 agaffney 107 def set_start(self, start):
547 agaffney 635 self._start = long(start)
548 agaffney 107
549 agaffney 509 ##
550 agaffney 514 # Returns the start sector for the partition
551 agaffney 107 def get_start(self):
552 agaffney 635 return long(self._start)
553 agaffney 107
554 agaffney 509 ##
555 agaffney 514 # Sets the end sector of the partition
556     # @param end End sector
557 agaffney 107 def set_end(self, end):
558 agaffney 635 self._end = long(end)
559 agaffney 107
560 agaffney 509 ##
561 agaffney 514 # Returns end sector for the partition
562 agaffney 107 def get_end(self):
563 agaffney 635 return long(self._end)
564 agaffney 107
565 agaffney 509 ##
566 agaffney 514 # Returns size of partition in MB
567 agaffney 492 def get_mb(self):
568 agaffney 1258 return self._mb
569 agaffney 492
570 agaffney 509 ##
571 agaffney 514 # Sets size of partition in MB
572 agaffney 509 # @param mb Parameter description
573 agaffney 494 def set_mb(self, mb):
574 agaffney 1258 self._mb = mb
575 agaffney 494
576 agaffney 509 ##
577 agaffney 514 # Sets type of partition
578 agaffney 509 # @param type Parameter description
579 agaffney 107 def set_type(self, type):
580     self._type = type
581    
582 agaffney 509 ##
583 agaffney 514 # Returns type of partition
584 agaffney 107 def get_type(self):
585     return self._type
586    
587 agaffney 509 ##
588 agaffney 514 # Returns parent GLIStorageDevice object
589 agaffney 107 def get_device(self):
590     return self._device
591    
592 agaffney 509 ##
593 agaffney 514 # Sets minor of partition
594     # @param minor New minor
595 agaffney 107 def set_minor(self, minor):
596 agaffney 492 self._minor = float(minor)
597 agaffney 107
598 agaffney 509 ##
599 agaffney 514 # Returns minor of partition
600 agaffney 107 def get_minor(self):
601 agaffney 492 return float(self._minor)
602 agaffney 107
603 agaffney 509 ##
604 agaffney 514 # Sets the original minor of the partition
605 agaffney 509 # @param orig_minor Parameter description
606 agaffney 386 def set_orig_minor(self, orig_minor):
607     self._orig_minor = int(orig_minor)
608    
609 agaffney 509 ##
610 agaffney 514 # Returns the original minor of the partition
611 agaffney 386 def get_orig_minor(self):
612     return self._orig_minor
613    
614 agaffney 509 ##
615 agaffney 514 # Sets the mountpoint for the partition
616     # @param mountpoint Mountpoint
617 agaffney 107 def set_mountpoint(self, mountpoint):
618     self._mountpoint = mountpoint
619    
620 agaffney 509 ##
621 agaffney 514 # Returns the mountpoint for the partition
622 agaffney 107 def get_mountpoint(self):
623     return self._mountpoint
624    
625 agaffney 509 ##
626 agaffney 514 # Sets the mount options for the partition
627     # @param mountopts Mount options
628 agaffney 107 def set_mountopts(self, mountopts):
629     self._mountopts = mountopts
630    
631 agaffney 509 ##
632 agaffney 514 # Returns the mount options for the partition
633 agaffney 107 def get_mountopts(self):
634     return self._mountopts
635    
636 agaffney 509 ##
637 agaffney 514 # Set whether to format the partition
638 agaffney 523 # @param format Format this partition (True/False)
639 agaffney 107 def set_format(self, format):
640     self._format = format
641    
642 agaffney 509 ##
643 agaffney 514 # Returns whether to format the partition
644 agaffney 107 def get_format(self):
645     return self._format
646    
647 agaffney 509 ##
648 agaffney 523 # Returns whether the partition is resizeable
649     def is_resizeable(self):
650     return self._resizeable
651    
652     ##
653     # Returns minimum MB for resize
654     def get_min_mb_for_resize(self):
655     # if self.is_extended():
656     # min_size = self._start
657     # for part in self._device._partitions:
658     # if part < 5: continue
659     # if part.get_end > min_size: min_size = part.get_end()
660     # return min_size
661     # else:
662     if self._resizeable:
663     return self._min_mb_for_resize
664 agaffney 107 else:
665 agaffney 523 return -1
666 agaffney 107
667 agaffney 509 ##
668 agaffney 523 # Returns maximum MB for resize
669     def get_max_mb_for_resize(self):
670 agaffney 544 if self._resizeable:
671     free_minor = 0
672     if self.is_logical():
673 agaffney 639 free_minor = self._minor + FREE_MINOR_FRAC_LOG
674 agaffney 544 else:
675 agaffney 639 free_minor = self._minor + FREE_MINOR_FRAC_PRI
676 agaffney 544 if free_minor in self._device._partitions:
677     return self._mb + self._device._partitions[free_minor]._mb
678     else:
679     return self._mb
680 agaffney 523 else:
681 agaffney 544 return -1
682 agaffney 107
683 agaffney 509 ##
684 agaffney 544 # Resizes the partition
685     # @param mb New size in MB
686     def resize(self, mb):
687     free_minor = self._minor
688 agaffney 107 if self.is_logical():
689 agaffney 639 free_minor += FREE_MINOR_FRAC_LOG
690 agaffney 544 else:
691 agaffney 639 free_minor += FREE_MINOR_FRAC_PRI
692 agaffney 544 if mb < self._mb:
693     # Shrinking
694     if not free_minor in self._device._partitions:
695     self._device._partitions[free_minor] = Partition(self._device, free_minor, 0, 0, 0, "free", format=False, existing=False)
696     self._device._partitions[free_minor]._mb += self._mb - mb
697     self._mb = mb
698     elif mb == self._mb + self._device._partitions[free_minor]._mb:
699     # Using all available unallocated space
700     del self._device._partitions[free_minor]
701     self._mb = mb
702     elif mb > self._mb:
703     # Growing
704     self._device._partitions[free_minor]._mb = mb - self._mb
705     self._mb = mb
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 robbat2 687 # TODO: rewrite for 2.4 support
714 agaffney 107 if not os.path.exists("/sys/bus"):
715 agaffney 556 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "no sysfs found (you MUST use a kernel >2.6)")
716 agaffney 107 # Make sure /proc/partitions exists
717     if not os.path.exists("/proc/partitions"):
718 agaffney 556 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "/proc/partitions does not exist! Please make sure procfs is in your kernel and mounted!")
719 agaffney 107
720     # Load /proc/partitions into the variable 'partitions'
721     partitions = []
722     for line in open("/proc/partitions"):
723 agaffney 556 if len(line.split()) < 4 or not line.split()[0].isdigit() or not line.split()[1].isdigit():
724 agaffney 107 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 robbat2 687 # TODO: rewrite for 2.4 support
761 agaffney 107 for dev_type in [ "ide", "scsi" ]: # Other device types? usb? fw?
762     if os.path.exists("/sys/bus/" + dev_type):
763     sysfs_devices = os.listdir("/sys/bus/"+dev_type+"/devices")
764    
765     # For each device in the devices on that bus
766     for sysfs_device in sysfs_devices:
767 agaffney 556 dev_file = "/sys/bus/" + dev_type + "/devices/" + sysfs_device + "/block/dev"
768 agaffney 107
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 agaffney 556 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "invalid major minor in " + dev_file)
780 agaffney 107
781     # Find a device listed in /proc/partitions
782     # that has the same minor and major as our
783     # current block device.
784     for record in partitions:
785     if major == record[0] and minor == record[1]:
786     devices.append(record[2])
787 agaffney 595
788     # For testing the partitioning code
789     if GLIUtility.is_file("/tmp/disk.img"):
790     devices.append("/tmp/disk.img")
791    
792 agaffney 107 # We have assembled the list of devices, so return it
793     return devices

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