/[gli]/trunk/src/GLIStorageDevice.py
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Revision 851 - (hide annotations) (download) (as text)
Mon Aug 22 18:35:52 2005 UTC (15 years, 2 months ago) by codeman
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updated all core files with new GPL notice and copyright statement.

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     'hppa': { 'fixedparts': [ { 'minor': 1, 'type': "boot" } ], 'disklabel': 'msdos', 'extended': False },
19     '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 731 def __init__(self, device, arch="x86", set_geometry=True, virtual=False, size_known=False):
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 107 self._parted_dev = parted.PedDevice.get(self._device)
55 agaffney 595 try:
56     self._parted_disk = parted.PedDisk.new(self._parted_dev)
57     except:
58     self._parted_disk = self._parted_dev.disk_new_fresh(parted.disk_type_get(archinfo[self._arch]['disklabel']))
59     self._disklabel = self._parted_disk.type.name
60 agaffney 596 if set_geometry:
61     self.set_disk_geometry_from_disk()
62 agaffney 107
63 agaffney 509 ##
64 agaffney 513 # Sets disk geometry info from disk. This function is used internally by __init__()
65 agaffney 107 def set_disk_geometry_from_disk(self):
66     self._total_bytes = self._parted_dev.length * self._parted_dev.sector_size
67 agaffney 205 self._geometry['heads'], self._geometry['sectors'], self._geometry['cylinders'] = self._parted_dev.heads, self._parted_dev.sectors, self._parted_dev.cylinders
68 agaffney 212 self._sector_bytes = self._parted_dev.sector_size
69     self._cylinder_bytes = self._geometry['heads'] * self._geometry['sectors'] * self._sector_bytes
70     self._total_sectors = self._parted_dev.length
71 agaffney 107 self._sectors_in_cylinder = self._geometry['heads'] * self._geometry['sectors']
72 agaffney 635 self._total_mb = long(self._total_bytes / MEGABYTE)
73 agaffney 107
74 agaffney 509 ##
75 agaffney 513 # Sets partition info from disk.
76 agaffney 107 def set_partitions_from_disk(self):
77 agaffney 492 last_part = 0
78     last_log_part = 4
79 agaffney 107 parted_part = self._parted_disk.next_partition()
80 agaffney 492 while parted_part:
81 agaffney 635 part_mb = long((parted_part.geom.end - parted_part.geom.start + 1) * self._sector_bytes / MEGABYTE)
82 agaffney 492 if parted_part.num >= 1:
83 agaffney 113 fs_type = ""
84     if parted_part.fs_type != None: fs_type = parted_part.fs_type.name
85     if parted_part.type == 2: fs_type = "extended"
86 agaffney 501 if archinfo[self._arch]['extended'] and parted_part.num > 4:
87     last_log_part = parted_part.num
88     else:
89     last_part = parted_part.num
90 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)
91     elif parted_part.type_name == "free":
92 agaffney 640 # parent_part = self.get_partition_at(parted_part.geom.start, ignore_extended=0)
93     # if parent_part:
94 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():
95 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)
96 agaffney 492 last_log_part += 1
97     else:
98 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)
99 agaffney 492 last_part += 1
100     parted_part = self._parted_disk.next_partition(parted_part)
101 agaffney 107
102 agaffney 509 ##
103 agaffney 639 # Imports partition info from the install profile partition structure
104 agaffney 513 # @param ips Parameter structure returned from install_profile.get_partition_tables()
105 agaffney 492 def set_partitions_from_install_profile_structure(self, ips):
106 agaffney 596 for part in ips:
107     tmppart = ips[part]
108     existing = False
109     if tmppart['origminor'] and not tmppart['format']:
110     existing = True
111 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'])
112 agaffney 492
113 agaffney 509 ##
114 agaffney 513 # Returns name of device (e.g. /dev/hda) being represented
115 agaffney 107 def get_device(self):
116     return self._device
117    
118 agaffney 509 ##
119 agaffney 513 # Combines free space and closes gaps in minor numbers. This is used internally
120 agaffney 494 def tidy_partitions(self):
121     last_minor = 0
122     last_log_minor = 4
123     last_free = 0
124     last_log_free = 0
125     parts = self._partitions.keys()
126     parts.sort()
127     for part in parts:
128 agaffney 497 if archinfo[self._arch]['extended'] and part > 4: break
129 agaffney 494 tmppart = self._partitions[part]
130     if tmppart.get_type() == "extended":
131     for part_log in parts:
132 agaffney 639 if part_log < (4 + FREE_MINOR_FRAC_LOG): continue
133 agaffney 494 tmppart_log = self._partitions[part_log]
134     if tmppart_log.get_type() == "free":
135 agaffney 495 if last_log_minor < last_log_free:
136     self._partitions[last_log_free].set_mb(self._partitions[last_log_free].get_mb()+tmppart_log.get_mb())
137     del self._partitions[part_log]
138 agaffney 494 else:
139 agaffney 495 if not last_log_free:
140 agaffney 639 last_log_free = last_log_minor + FREE_MINOR_FRAC_LOG
141 agaffney 544 else:
142 agaffney 627 last_log_free = part_log
143 agaffney 495 tmppart_log.set_minor(last_log_free)
144     self._partitions[last_log_free] = tmppart_log
145     if part_log != last_log_free: del self._partitions[part_log]
146 agaffney 494 else:
147     if part_log > (last_log_minor + 1):
148     tmppart_log.set_minor(last_log_minor + 1)
149 agaffney 495 last_log_minor = last_log_minor + 1
150     self._partitions[last_log_minor] = tmppart_log
151     del self._partitions[part_log]
152 agaffney 544 else:
153     last_log_minor = part_log
154 agaffney 627 elif tmppart.get_type() == "free":
155 agaffney 495 if last_minor < last_free:
156     self._partitions[last_free].set_mb(self._partitions[last_free].get_mb()+tmppart.get_mb())
157     del self._partitions[part]
158 agaffney 494 else:
159 agaffney 495 if not last_free:
160 agaffney 639 last_free = last_minor + FREE_MINOR_FRAC_PRI
161 agaffney 544 else:
162     last_free = part
163 agaffney 495 tmppart.set_minor(last_free)
164     self._partitions[last_free] = tmppart
165     if part != last_free: del self._partitions[part]
166 agaffney 494 else:
167     if part > (last_minor + 1):
168     tmppart.set_minor(last_minor + 1)
169 agaffney 495 last_minor = last_minor + 1
170     self._partitions[last_minor] = tmppart
171     del self._partitions[part]
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 635 # @param mkfsopts='' Additional mkfs options
185     def add_partition(self, free_minor, mb, start, end, type, mountpoint='', mountopts='',mkfsopts=''):
186 agaffney 492 new_minor = int(free_minor) + 1
187     if self._partitions.has_key(new_minor):
188 agaffney 107 parts = self._partitions.keys()
189     parts.sort()
190     parts.reverse()
191     hole_at = 0
192     for i in range(1, parts[0]+1):
193 agaffney 492 if i <= new_minor: continue
194     if not self._partitions.has_key(i):
195 agaffney 107 hole_at = i
196     break
197     stopscooting = 0
198     for i in parts:
199     if stopscooting: break
200 agaffney 492 if i >= hole_at and hole_at: continue
201     if i >= new_minor:
202 agaffney 107 self._partitions[i].set_minor(i+1)
203     self._partitions[i+1] = self._partitions[i]
204 agaffney 492 if i == new_minor: stopscooting = 1
205 agaffney 494 if mb != self._partitions[free_minor].get_mb():
206     old_free_mb = self._partitions[free_minor].get_mb()
207     del self._partitions[free_minor]
208 agaffney 497 if archinfo[self._arch]['extended'] and new_minor >= 5:
209 agaffney 639 free_minor = new_minor + FREE_MINOR_FRAC_LOG
210 agaffney 494 else:
211 agaffney 639 free_minor = new_minor + FREE_MINOR_FRAC_PRI
212 agaffney 494 self._partitions[free_minor] = Partition(self, free_minor, old_free_mb-mb, 0, 0, "free")
213     else:
214     del self._partitions[free_minor]
215 agaffney 635 self._partitions[new_minor] = Partition(self, new_minor, mb, start, end, type, mountpoint=mountpoint, mountopts=mountopts,mkfsopts=mkfsopts)
216 agaffney 494 if type == "extended":
217 agaffney 639 self._partitions[4 + FREE_MINOR_FRAC_LOG] = Partition(self, (4 + FREE_MINOR_FRAC_LOG), mb, 0, 0, "free")
218 agaffney 494 self.tidy_partitions()
219 agaffney 107
220 agaffney 509 ##
221 agaffney 513 # Removes partition from partition info
222     # @param minor Minor of partition to remove
223 agaffney 107 def remove_partition(self, minor):
224 agaffney 492 tmppart = self._partitions[int(minor)]
225     free_minor = 0
226     if tmppart.is_logical():
227 agaffney 639 free_minor = int(minor-1)+FREE_MINOR_FRAC_LOG
228 agaffney 492 else:
229 agaffney 639 free_minor = int(minor-1)+FREE_MINOR_FRAC_PRI
230     if free_minor in self._partitions:
231     self._partitions[free_minor].set_mb(self._partitions[free_minor].get_mb() + tmppart.get_mb())
232     else:
233     self._partitions[free_minor] = Partition(self, free_minor, tmppart.get_mb(), 0, 0, "free", format=False, existing=False)
234 agaffney 107 del self._partitions[int(minor)]
235 agaffney 494 self.tidy_partitions()
236 agaffney 107
237 agaffney 509 ##
238 agaffney 513 # Returns an ordered list (disk order) of partition minors
239 agaffney 107 def get_ordered_partition_list(self):
240 codeman 625 parts = self._partitions.keys()
241     parts.sort()
242     partlist = []
243 agaffney 492 tmppart = None
244     for part in parts:
245 agaffney 639 if archinfo[self._arch]['extended'] and part > (4 + FREE_MINOR_FRAC_PRI): break
246 agaffney 107 tmppart = self._partitions[part]
247 agaffney 492 partlist.append(part)
248 agaffney 107 if tmppart.is_extended():
249     for part_log in parts:
250 agaffney 639 if part_log < (4 + FREE_MINOR_FRAC_LOG): continue
251 agaffney 492 partlist.append(part_log)
252 agaffney 107 return partlist
253    
254 agaffney 509 ##
255 agaffney 513 # Returns partition info in a format suitable for passing to install_profile.set_partition_tables()
256 agaffney 107 def get_install_profile_structure(self):
257     devdic = {}
258     for part in self._partitions:
259     tmppart = self._partitions[part]
260 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 }
261 agaffney 107 return devdic
262    
263 agaffney 509 ##
264 agaffney 513 # Returns the minor of the extended partition, if any
265 agaffney 183 def get_extended_partition(self):
266     for part in self._partitions:
267     tmppart = self._partitions[part]
268     if tmppart.is_extended():
269     return part
270 agaffney 184 return 0
271 agaffney 183
272 agaffney 509 ##
273 agaffney 624 # Returns the drive model
274     def get_model(self):
275     return self._parted_dev.model
276    
277     ##
278 agaffney 596 # Sets the disklabel type
279     def set_disklabel(self, disklabel):
280     self._disklabel = disklabel
281    
282     ##
283     # Returns the disklabel type
284     def get_disklabel(self):
285     return self._disklabel
286    
287     ##
288 agaffney 513 # Returns the number of sectors on the device
289 agaffney 107 def get_num_sectors(self):
290 agaffney 635 return long(self._total_sectors)
291 agaffney 107
292 agaffney 509 ##
293 agaffney 513 # Returns the size of a cylinder in bytes
294 agaffney 107 def get_cylinder_size(self):
295 agaffney 635 return long(self._cylinder_bytes)
296 agaffney 107
297 agaffney 509 ##
298 agaffney 513 # Returns the size of a sector in bytes
299 agaffney 212 def get_sector_size(self):
300 agaffney 635 return long(self._sector_bytes)
301 agaffney 212
302 agaffney 509 ##
303 agaffney 513 # Returns the number of cylinders
304 agaffney 107 def get_num_cylinders(self):
305 agaffney 635 return long(self._geometry['cylinders'])
306 agaffney 107
307 agaffney 509 ##
308 agaffney 513 # Returns the total number of bytes on the device
309 agaffney 107 def get_drive_bytes(self):
310 agaffney 635 return long(self._total_bytes)
311 agaffney 107
312 agaffney 509 ##
313 agaffney 513 # Returns the total number of MB on the device
314 agaffney 492 def get_total_mb(self):
315     return self._total_mb
316    
317 agaffney 509 ##
318 agaffney 513 # Returns partition info dictionary
319 agaffney 107 def get_partitions(self):
320     return self._partitions
321    
322 agaffney 509 ##
323 agaffney 513 # Prints disk geometry to STDOUT (no longer used)
324 agaffney 107 def print_geometry(self):
325     print self._total_bytes, self._geometry
326    
327 agaffney 513 ##
328     # This class represents a partition within a GLIStorageDevice object
329 agaffney 107 class Partition:
330     "Class representing a single partition within a Device object"
331    
332     _device = None
333 agaffney 492 _minor = 0
334     _orig_minor = 0
335     _start = 0
336     _end = 0
337 agaffney 107 _type = None
338     _mountpoint = None
339     _mountopts = None
340     _format = None
341     _resizeable = None
342 agaffney 523 _min_mb_for_resize = 0
343 agaffney 492 _mb = 0
344 agaffney 631 _mkfsopts = None
345 agaffney 107
346 agaffney 509 ##
347 agaffney 514 # Initialization function for the Partition class
348     # @param device Parent GLIStorageDevice object
349     # @param minor Minor of partition
350     # @param mb Parameter Size of partition in MB
351     # @param start Parameter Start sector of partition
352     # @param end Parameter Start sector of partition
353     # @param type Parameter Type of partition (ext2, ext3, fat32, linux-swap, free, extended, etc.)
354     # @param mountpoint='' Mountpoint of partition
355     # @param mountopts='' Mount options of partition
356 agaffney 635 # @param mkfsopts='' Additional mkfs options
357 agaffney 514 # @param format=True Format partition
358     # @param existing=False This partition exists on disk
359 agaffney 631 def __init__(self, device, minor, mb, start, end, type, mountpoint='', mountopts='', format=True, existing=False, origminor=0, mkfsopts=''):
360 agaffney 107 self._device = device
361 agaffney 492 self._minor = float(minor)
362 agaffney 635 self._start = long(start)
363     self._end = long(end)
364 agaffney 492 self._type = type or "unknown"
365 agaffney 107 self._mountpoint = mountpoint
366     self._mountopts = mountopts
367     self._format = format
368 agaffney 492 self._mb = mb
369 agaffney 596 self._orig_minor = origminor
370 agaffney 631 self._mkfsopts = mkfsopts
371 agaffney 596 if type != "free":
372     if existing and not origminor:
373     self._orig_minor = self._minor
374     self._minor = int(self._minor)
375     self._orig_minor = int(self._orig_minor)
376 agaffney 231 if existing:
377 agaffney 826 try:
378     parted_part = device._parted_disk.get_partition(self._orig_minor)
379     label_type = device._parted_disk.type.name
380     if label_type == "loop":
381     dev_node = device._device
382     else:
383     dev_node = device._device + str(self._orig_minor)
384     # print "dev_node = " + dev_node
385     if type == "ntfs":
386     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 .\+//'"))
387     self._min_mb_for_resize = long(min_bytes / MEGABYTE) + 1
388     self._resizeable = True
389     elif type == "ext2" or type == "ext3":
390     block_size = long(string.strip(commands.getoutput("dumpe2fs -h " + dev_node + r" 2>&1 | grep -e '^Block size:' | sed -e 's/^Block size:\s\+//'")))
391     free_blocks = long(string.strip(commands.getoutput("dumpe2fs -h " + dev_node + r" 2>&1 | grep -e '^Free blocks:' | sed -e 's/^Free blocks:\s\+//'")))
392     free_bytes = long(block_size * free_blocks)
393     # can't hurt to pad (the +50) it a bit since this is really just a guess
394     self._min_mb_for_resize = self._mb - long(free_bytes / MEGABYTE) + 50
395     self._resizeable = True
396     else:
397     parted_part = self._device._parted_disk.get_partition(int(self._orig_minor))
398 agaffney 301 parted_fs = parted_part.geom.file_system_open()
399 agaffney 826 resize_constraint = parted_fs.get_resize_constraint()
400     min_bytes = resize_constraint.min_size * self._device._sector_bytes
401     self._min_mb_for_resize = long(min_bytes / MEGABYTE) + 1
402     self._resizeable = True
403     except:
404     self._resizeable = False
405 agaffney 107
406 agaffney 509 ##
407 agaffney 514 # Returns whether or not the partition is extended
408 agaffney 107 def is_extended(self):
409     if self._type == "extended":
410     return True
411     else:
412     return False
413    
414 agaffney 509 ##
415 agaffney 514 # Returns whether or not the partition is logical
416 agaffney 107 def is_logical(self):
417 agaffney 492 if self._type == "free":
418 agaffney 639 if int(self._minor) + FREE_MINOR_FRAC_LOG == self._minor:
419 agaffney 492 return True
420     else:
421     return False
422 agaffney 497 elif archinfo[self._device._arch]['extended'] and self._minor > 4:
423 agaffney 107 return True
424 agaffney 492 else:
425     return False
426 agaffney 107
427 agaffney 509 ##
428 agaffney 514 # Returns a list of logical partitions if this is an extended partition
429 agaffney 107 def get_logicals(self):
430 agaffney 184 if not self.is_extended():
431     return None
432 agaffney 107 logicals = []
433 agaffney 184 parts = self._device._partitions.keys()
434     parts.sort()
435     for part in parts:
436     if part < 5: continue
437 agaffney 107 logicals.append(part)
438     logicals.sort()
439     return logicals
440    
441 agaffney 509 ##
442 agaffney 514 # Returns the extened parent partition if this is a logical partition (no longer used)
443 agaffney 107 def get_extended_parent(self):
444 agaffney 184 if not self.is_logical():
445     return None
446     else:
447     return self._device.get_partition_at(self._start, ignore_extended=0)
448 agaffney 107
449 agaffney 509 ##
450 agaffney 631 # Sets the options passed to mkfs
451     # @param mkfsopts Options passed to mkfs
452     def set_mkfsopts(self, mkfsopts):
453     self._mkfsopts = mkfsopts
454    
455     ##
456     # Returns the options passes to mkfs
457     def get_mkfsopts(self):
458     return self._mkfsopts
459    
460     ##
461 agaffney 514 # Sets the start sector for the partition
462     # @param start Start sector
463 agaffney 107 def set_start(self, start):
464 agaffney 635 self._start = long(start)
465 agaffney 107
466 agaffney 509 ##
467 agaffney 514 # Returns the start sector for the partition
468 agaffney 107 def get_start(self):
469 agaffney 635 return long(self._start)
470 agaffney 107
471 agaffney 509 ##
472 agaffney 514 # Sets the end sector of the partition
473     # @param end End sector
474 agaffney 107 def set_end(self, end):
475 agaffney 635 self._end = long(end)
476 agaffney 107
477 agaffney 509 ##
478 agaffney 514 # Returns end sector for the partition
479 agaffney 107 def get_end(self):
480 agaffney 635 return long(self._end)
481 agaffney 107
482 agaffney 509 ##
483 agaffney 514 # Returns size of partition in MB
484 agaffney 492 def get_mb(self):
485 agaffney 635 return long(self._mb)
486 agaffney 492
487 agaffney 509 ##
488 agaffney 514 # Sets size of partition in MB
489 agaffney 509 # @param mb Parameter description
490 agaffney 494 def set_mb(self, mb):
491 agaffney 635 self._mb = long(mb)
492 agaffney 494
493 agaffney 509 ##
494 agaffney 514 # Sets type of partition
495 agaffney 509 # @param type Parameter description
496 agaffney 107 def set_type(self, type):
497     self._type = type
498    
499 agaffney 509 ##
500 agaffney 514 # Returns type of partition
501 agaffney 107 def get_type(self):
502     return self._type
503    
504 agaffney 509 ##
505 agaffney 514 # Returns parent GLIStorageDevice object
506 agaffney 107 def get_device(self):
507     return self._device
508    
509 agaffney 509 ##
510 agaffney 514 # Sets minor of partition
511     # @param minor New minor
512 agaffney 107 def set_minor(self, minor):
513 agaffney 492 self._minor = float(minor)
514 agaffney 107
515 agaffney 509 ##
516 agaffney 514 # Returns minor of partition
517 agaffney 107 def get_minor(self):
518 agaffney 492 return float(self._minor)
519 agaffney 107
520 agaffney 509 ##
521 agaffney 514 # Sets the original minor of the partition
522 agaffney 509 # @param orig_minor Parameter description
523 agaffney 386 def set_orig_minor(self, orig_minor):
524     self._orig_minor = int(orig_minor)
525    
526 agaffney 509 ##
527 agaffney 514 # Returns the original minor of the partition
528 agaffney 386 def get_orig_minor(self):
529     return self._orig_minor
530    
531 agaffney 509 ##
532 agaffney 514 # Sets the mountpoint for the partition
533     # @param mountpoint Mountpoint
534 agaffney 107 def set_mountpoint(self, mountpoint):
535     self._mountpoint = mountpoint
536    
537 agaffney 509 ##
538 agaffney 514 # Returns the mountpoint for the partition
539 agaffney 107 def get_mountpoint(self):
540     return self._mountpoint
541    
542 agaffney 509 ##
543 agaffney 514 # Sets the mount options for the partition
544     # @param mountopts Mount options
545 agaffney 107 def set_mountopts(self, mountopts):
546     self._mountopts = mountopts
547    
548 agaffney 509 ##
549 agaffney 514 # Returns the mount options for the partition
550 agaffney 107 def get_mountopts(self):
551     return self._mountopts
552    
553 agaffney 509 ##
554 agaffney 514 # Set whether to format the partition
555 agaffney 523 # @param format Format this partition (True/False)
556 agaffney 107 def set_format(self, format):
557     self._format = format
558    
559 agaffney 509 ##
560 agaffney 514 # Returns whether to format the partition
561 agaffney 107 def get_format(self):
562     return self._format
563    
564 agaffney 509 ##
565 agaffney 523 # Returns whether the partition is resizeable
566     def is_resizeable(self):
567     return self._resizeable
568    
569     ##
570     # Returns minimum MB for resize
571     def get_min_mb_for_resize(self):
572     # if self.is_extended():
573     # min_size = self._start
574     # for part in self._device._partitions:
575     # if part < 5: continue
576     # if part.get_end > min_size: min_size = part.get_end()
577     # return min_size
578     # else:
579     if self._resizeable:
580     return self._min_mb_for_resize
581 agaffney 107 else:
582 agaffney 523 return -1
583 agaffney 107
584 agaffney 509 ##
585 agaffney 523 # Returns maximum MB for resize
586     def get_max_mb_for_resize(self):
587 agaffney 544 if self._resizeable:
588     free_minor = 0
589     if self.is_logical():
590 agaffney 639 free_minor = self._minor + FREE_MINOR_FRAC_LOG
591 agaffney 544 else:
592 agaffney 639 free_minor = self._minor + FREE_MINOR_FRAC_PRI
593 agaffney 544 if free_minor in self._device._partitions:
594     return self._mb + self._device._partitions[free_minor]._mb
595     else:
596     return self._mb
597 agaffney 523 else:
598 agaffney 544 return -1
599 agaffney 107
600 agaffney 509 ##
601 agaffney 544 # Resizes the partition
602     # @param mb New size in MB
603     def resize(self, mb):
604     free_minor = self._minor
605 agaffney 107 if self.is_logical():
606 agaffney 639 free_minor += FREE_MINOR_FRAC_LOG
607 agaffney 544 else:
608 agaffney 639 free_minor += FREE_MINOR_FRAC_PRI
609 agaffney 544 if mb < self._mb:
610     # Shrinking
611     if not free_minor in self._device._partitions:
612     self._device._partitions[free_minor] = Partition(self._device, free_minor, 0, 0, 0, "free", format=False, existing=False)
613     self._device._partitions[free_minor]._mb += self._mb - mb
614     self._mb = mb
615     elif mb == self._mb + self._device._partitions[free_minor]._mb:
616     # Using all available unallocated space
617     del self._device._partitions[free_minor]
618     self._mb = mb
619     elif mb > self._mb:
620     # Growing
621     self._device._partitions[free_minor]._mb = mb - self._mb
622     self._mb = mb
623 agaffney 107
624 agaffney 514 ##
625     # Returns a list of detected partitionable devices
626 agaffney 107 def detect_devices():
627     devices = []
628    
629     # Make sure sysfs exists
630 robbat2 687 # TODO: rewrite for 2.4 support
631 agaffney 107 if not os.path.exists("/sys/bus"):
632 agaffney 556 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "no sysfs found (you MUST use a kernel >2.6)")
633 agaffney 107 # Make sure /proc/partitions exists
634     if not os.path.exists("/proc/partitions"):
635 agaffney 556 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "/proc/partitions does not exist! Please make sure procfs is in your kernel and mounted!")
636 agaffney 107
637     # Load /proc/partitions into the variable 'partitions'
638     partitions = []
639     for line in open("/proc/partitions"):
640 agaffney 556 if len(line.split()) < 4 or not line.split()[0].isdigit() or not line.split()[1].isdigit():
641 agaffney 107 continue
642    
643     # Get the major, minor and device name
644     major = line.split()[0]
645     minor = line.split()[1]
646     device = "/dev/" + line.split()[3]
647    
648     if not major.isdigit() or not minor.isdigit():
649     continue
650    
651     major = int(major)
652     minor = int(minor)
653    
654     # If there is no /dev/'device_name', then scan
655     # all the devices in /dev to try and find a
656     # devices with the same major and minor
657     if not os.path.exists(device):
658     device = None
659     for path, dirs, files in os.walk("/dev"):
660 agaffney 535 for d_file in files:
661     full_file = os.path.join(path, d_file)
662 agaffney 107 if not os.path.exists(full_file):
663     continue
664     statres = os.stat(full_file)
665     fmaj = os.major(statres.st_rdev)
666     fmin = os.minor(statres.st_rdev)
667     if fmaj == major and fmin == minor:
668     device = full_file
669     break
670     if not device:
671     continue
672    
673     partitions.append(( major, minor, device ))
674    
675     # Scan sysfs for the devices of type 'x'
676     # 'x' being a member of the list below:
677 robbat2 687 # TODO: rewrite for 2.4 support
678 agaffney 107 for dev_type in [ "ide", "scsi" ]: # Other device types? usb? fw?
679     if os.path.exists("/sys/bus/" + dev_type):
680     sysfs_devices = os.listdir("/sys/bus/"+dev_type+"/devices")
681    
682     # For each device in the devices on that bus
683     for sysfs_device in sysfs_devices:
684 agaffney 556 dev_file = "/sys/bus/" + dev_type + "/devices/" + sysfs_device + "/block/dev"
685 agaffney 107
686     # If the file is not a block device, loop
687     if not os.path.exists(dev_file):
688     continue
689    
690     # Get the major and minor info
691     try:
692     major, minor = open(dev_file).read().split(":")
693     major = int(major)
694     minor = int(minor)
695     except:
696 agaffney 556 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "invalid major minor in " + dev_file)
697 agaffney 107
698     # Find a device listed in /proc/partitions
699     # that has the same minor and major as our
700     # current block device.
701     for record in partitions:
702     if major == record[0] and minor == record[1]:
703     devices.append(record[2])
704 agaffney 595
705     # For testing the partitioning code
706     if GLIUtility.is_file("/tmp/disk.img"):
707     devices.append("/tmp/disk.img")
708    
709 agaffney 107 # We have assembled the list of devices, so return it
710     return devices

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