/[gli]/trunk/src/GLIStorageDevice.py
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Revision 912 - (hide annotations) (download) (as text)
Sun Sep 18 02:28:13 2005 UTC (15 years, 1 month ago) by agaffney
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added do_recommended() function to automatically created 256M/1G/* layout

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 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 912 # Uses magic to apply the recommended partition layout
120     def do_recommended(self):
121     free_minor = 0
122     parts = self._partitions.keys()
123     parts.sort()
124     for part in parts:
125     if self._partitions[part].get_type() == "free" and self._partitions[part].get_mb() >= 4096:
126     free_minor = part
127     if not free_minor:
128     raise GLIException("RecommendedPartitionLayoutError", "notice", "do_recommended", "You do not have atleast 4GB of concurrent unallocated space. Please remove some partitions and try again.")
129     if not self._partitions[free_minor].is_logical() and archinfo[self._arch]['extended'] and free_minor > 2:
130     raise GLIException("RecommendedPartitionLayoutError", "notice", "do_recommended", "You have more than 1 existing primary partition defined. Please create an extended partition in the remaining unallocated space and try again.")
131     self.add_partition(free_minor, 256, 0, 0, "ext2")
132     self.add_partition(free_minor+1, 1024, 0, 0, "linux-swap")
133     self.add_partition(free_minor+2, self._partitions[free_minor+2].get_mb(), 0, 0, "ext3")
134     return True
135    
136     ##
137 agaffney 513 # Combines free space and closes gaps in minor numbers. This is used internally
138 agaffney 494 def tidy_partitions(self):
139     last_minor = 0
140     last_log_minor = 4
141     last_free = 0
142     last_log_free = 0
143     parts = self._partitions.keys()
144     parts.sort()
145     for part in parts:
146 agaffney 497 if archinfo[self._arch]['extended'] and part > 4: break
147 agaffney 494 tmppart = self._partitions[part]
148     if tmppart.get_type() == "extended":
149     for part_log in parts:
150 agaffney 639 if part_log < (4 + FREE_MINOR_FRAC_LOG): continue
151 agaffney 494 tmppart_log = self._partitions[part_log]
152     if tmppart_log.get_type() == "free":
153 agaffney 495 if last_log_minor < last_log_free:
154     self._partitions[last_log_free].set_mb(self._partitions[last_log_free].get_mb()+tmppart_log.get_mb())
155     del self._partitions[part_log]
156 agaffney 494 else:
157 agaffney 495 if not last_log_free:
158 agaffney 639 last_log_free = last_log_minor + FREE_MINOR_FRAC_LOG
159 agaffney 544 else:
160 agaffney 627 last_log_free = part_log
161 agaffney 495 tmppart_log.set_minor(last_log_free)
162     self._partitions[last_log_free] = tmppart_log
163     if part_log != last_log_free: del self._partitions[part_log]
164 agaffney 494 else:
165     if part_log > (last_log_minor + 1):
166     tmppart_log.set_minor(last_log_minor + 1)
167 agaffney 495 last_log_minor = last_log_minor + 1
168     self._partitions[last_log_minor] = tmppart_log
169     del self._partitions[part_log]
170 agaffney 544 else:
171     last_log_minor = part_log
172 agaffney 627 elif tmppart.get_type() == "free":
173 agaffney 495 if last_minor < last_free:
174     self._partitions[last_free].set_mb(self._partitions[last_free].get_mb()+tmppart.get_mb())
175     del self._partitions[part]
176 agaffney 494 else:
177 agaffney 495 if not last_free:
178 agaffney 639 last_free = last_minor + FREE_MINOR_FRAC_PRI
179 agaffney 544 else:
180     last_free = part
181 agaffney 495 tmppart.set_minor(last_free)
182     self._partitions[last_free] = tmppart
183     if part != last_free: del self._partitions[part]
184 agaffney 494 else:
185     if part > (last_minor + 1):
186     tmppart.set_minor(last_minor + 1)
187 agaffney 495 last_minor = last_minor + 1
188     self._partitions[last_minor] = tmppart
189     del self._partitions[part]
190 agaffney 544 else:
191     last_minor = part
192 agaffney 494
193 agaffney 509 ##
194 agaffney 513 # Adds a new partition to the partition info
195     # @param free_minor minor of unallocated space partition is being created in
196     # @param mb size of partition in MB
197     # @param start Start sector (only used for existing partitions)
198     # @param end End sector (only used for existing partitions)
199     # @param type Partition type (ext2, ext3, fat32, linux-swap, free, extended, etc.)
200     # @param mountpoint='' Partition mountpoint
201     # @param mountopts='' Partition mount options
202 agaffney 635 # @param mkfsopts='' Additional mkfs options
203     def add_partition(self, free_minor, mb, start, end, type, mountpoint='', mountopts='',mkfsopts=''):
204 agaffney 492 new_minor = int(free_minor) + 1
205     if self._partitions.has_key(new_minor):
206 agaffney 107 parts = self._partitions.keys()
207     parts.sort()
208     parts.reverse()
209     hole_at = 0
210     for i in range(1, parts[0]+1):
211 agaffney 492 if i <= new_minor: continue
212     if not self._partitions.has_key(i):
213 agaffney 107 hole_at = i
214     break
215     stopscooting = 0
216     for i in parts:
217     if stopscooting: break
218 agaffney 492 if i >= hole_at and hole_at: continue
219     if i >= new_minor:
220 agaffney 107 self._partitions[i].set_minor(i+1)
221     self._partitions[i+1] = self._partitions[i]
222 agaffney 492 if i == new_minor: stopscooting = 1
223 agaffney 494 if mb != self._partitions[free_minor].get_mb():
224     old_free_mb = self._partitions[free_minor].get_mb()
225     del self._partitions[free_minor]
226 agaffney 497 if archinfo[self._arch]['extended'] and new_minor >= 5:
227 agaffney 639 free_minor = new_minor + FREE_MINOR_FRAC_LOG
228 agaffney 494 else:
229 agaffney 639 free_minor = new_minor + FREE_MINOR_FRAC_PRI
230 agaffney 494 self._partitions[free_minor] = Partition(self, free_minor, old_free_mb-mb, 0, 0, "free")
231     else:
232     del self._partitions[free_minor]
233 agaffney 635 self._partitions[new_minor] = Partition(self, new_minor, mb, start, end, type, mountpoint=mountpoint, mountopts=mountopts,mkfsopts=mkfsopts)
234 agaffney 494 if type == "extended":
235 agaffney 639 self._partitions[4 + FREE_MINOR_FRAC_LOG] = Partition(self, (4 + FREE_MINOR_FRAC_LOG), mb, 0, 0, "free")
236 agaffney 494 self.tidy_partitions()
237 agaffney 107
238 agaffney 509 ##
239 agaffney 513 # Removes partition from partition info
240     # @param minor Minor of partition to remove
241 agaffney 107 def remove_partition(self, minor):
242 agaffney 492 tmppart = self._partitions[int(minor)]
243     free_minor = 0
244     if tmppart.is_logical():
245 agaffney 639 free_minor = int(minor-1)+FREE_MINOR_FRAC_LOG
246 agaffney 492 else:
247 agaffney 639 free_minor = int(minor-1)+FREE_MINOR_FRAC_PRI
248     if free_minor in self._partitions:
249     self._partitions[free_minor].set_mb(self._partitions[free_minor].get_mb() + tmppart.get_mb())
250     else:
251     self._partitions[free_minor] = Partition(self, free_minor, tmppart.get_mb(), 0, 0, "free", format=False, existing=False)
252 agaffney 107 del self._partitions[int(minor)]
253 agaffney 494 self.tidy_partitions()
254 agaffney 107
255 agaffney 509 ##
256 agaffney 513 # Returns an ordered list (disk order) of partition minors
257 agaffney 107 def get_ordered_partition_list(self):
258 codeman 625 parts = self._partitions.keys()
259     parts.sort()
260     partlist = []
261 agaffney 492 tmppart = None
262     for part in parts:
263 agaffney 639 if archinfo[self._arch]['extended'] and part > (4 + FREE_MINOR_FRAC_PRI): break
264 agaffney 107 tmppart = self._partitions[part]
265 agaffney 492 partlist.append(part)
266 agaffney 107 if tmppart.is_extended():
267     for part_log in parts:
268 agaffney 639 if part_log < (4 + FREE_MINOR_FRAC_LOG): continue
269 agaffney 492 partlist.append(part_log)
270 agaffney 107 return partlist
271    
272 agaffney 509 ##
273 agaffney 513 # Returns partition info in a format suitable for passing to install_profile.set_partition_tables()
274 agaffney 107 def get_install_profile_structure(self):
275     devdic = {}
276     for part in self._partitions:
277     tmppart = self._partitions[part]
278 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 }
279 agaffney 107 return devdic
280    
281 agaffney 509 ##
282 agaffney 513 # Returns the minor of the extended partition, if any
283 agaffney 183 def get_extended_partition(self):
284     for part in self._partitions:
285     tmppart = self._partitions[part]
286     if tmppart.is_extended():
287     return part
288 agaffney 184 return 0
289 agaffney 183
290 agaffney 509 ##
291 agaffney 624 # Returns the drive model
292     def get_model(self):
293     return self._parted_dev.model
294    
295     ##
296 agaffney 596 # Sets the disklabel type
297     def set_disklabel(self, disklabel):
298     self._disklabel = disklabel
299    
300     ##
301     # Returns the disklabel type
302     def get_disklabel(self):
303     return self._disklabel
304    
305     ##
306 agaffney 513 # Returns the number of sectors on the device
307 agaffney 107 def get_num_sectors(self):
308 agaffney 635 return long(self._total_sectors)
309 agaffney 107
310 agaffney 509 ##
311 agaffney 513 # Returns the size of a cylinder in bytes
312 agaffney 107 def get_cylinder_size(self):
313 agaffney 635 return long(self._cylinder_bytes)
314 agaffney 107
315 agaffney 509 ##
316 agaffney 513 # Returns the size of a sector in bytes
317 agaffney 212 def get_sector_size(self):
318 agaffney 635 return long(self._sector_bytes)
319 agaffney 212
320 agaffney 509 ##
321 agaffney 513 # Returns the number of cylinders
322 agaffney 107 def get_num_cylinders(self):
323 agaffney 635 return long(self._geometry['cylinders'])
324 agaffney 107
325 agaffney 509 ##
326 agaffney 513 # Returns the total number of bytes on the device
327 agaffney 107 def get_drive_bytes(self):
328 agaffney 635 return long(self._total_bytes)
329 agaffney 107
330 agaffney 509 ##
331 agaffney 513 # Returns the total number of MB on the device
332 agaffney 492 def get_total_mb(self):
333     return self._total_mb
334    
335 agaffney 509 ##
336 agaffney 513 # Returns partition info dictionary
337 agaffney 107 def get_partitions(self):
338     return self._partitions
339    
340 agaffney 509 ##
341 agaffney 513 # Prints disk geometry to STDOUT (no longer used)
342 agaffney 107 def print_geometry(self):
343     print self._total_bytes, self._geometry
344    
345 agaffney 513 ##
346     # This class represents a partition within a GLIStorageDevice object
347 agaffney 107 class Partition:
348     "Class representing a single partition within a Device object"
349    
350     _device = None
351 agaffney 492 _minor = 0
352     _orig_minor = 0
353     _start = 0
354     _end = 0
355 agaffney 107 _type = None
356     _mountpoint = None
357     _mountopts = None
358     _format = None
359     _resizeable = None
360 agaffney 523 _min_mb_for_resize = 0
361 agaffney 492 _mb = 0
362 agaffney 631 _mkfsopts = None
363 agaffney 107
364 agaffney 509 ##
365 agaffney 514 # Initialization function for the Partition class
366     # @param device Parent GLIStorageDevice object
367     # @param minor Minor of partition
368     # @param mb Parameter Size of partition in MB
369     # @param start Parameter Start sector of partition
370     # @param end Parameter Start sector of partition
371     # @param type Parameter Type of partition (ext2, ext3, fat32, linux-swap, free, extended, etc.)
372     # @param mountpoint='' Mountpoint of partition
373     # @param mountopts='' Mount options of partition
374 agaffney 635 # @param mkfsopts='' Additional mkfs options
375 agaffney 514 # @param format=True Format partition
376     # @param existing=False This partition exists on disk
377 agaffney 631 def __init__(self, device, minor, mb, start, end, type, mountpoint='', mountopts='', format=True, existing=False, origminor=0, mkfsopts=''):
378 agaffney 107 self._device = device
379 agaffney 492 self._minor = float(minor)
380 agaffney 635 self._start = long(start)
381     self._end = long(end)
382 agaffney 492 self._type = type or "unknown"
383 agaffney 107 self._mountpoint = mountpoint
384     self._mountopts = mountopts
385     self._format = format
386 agaffney 492 self._mb = mb
387 agaffney 596 self._orig_minor = origminor
388 agaffney 631 self._mkfsopts = mkfsopts
389 agaffney 596 if type != "free":
390     if existing and not origminor:
391     self._orig_minor = self._minor
392     self._minor = int(self._minor)
393     self._orig_minor = int(self._orig_minor)
394 agaffney 231 if existing:
395 agaffney 826 try:
396     parted_part = device._parted_disk.get_partition(self._orig_minor)
397     label_type = device._parted_disk.type.name
398     if label_type == "loop":
399     dev_node = device._device
400     else:
401     dev_node = device._device + str(self._orig_minor)
402     # print "dev_node = " + dev_node
403     if type == "ntfs":
404     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 .\+//'"))
405     self._min_mb_for_resize = long(min_bytes / MEGABYTE) + 1
406     self._resizeable = True
407     elif type == "ext2" or type == "ext3":
408     block_size = long(string.strip(commands.getoutput("dumpe2fs -h " + dev_node + r" 2>&1 | grep -e '^Block size:' | sed -e 's/^Block size:\s\+//'")))
409     free_blocks = long(string.strip(commands.getoutput("dumpe2fs -h " + dev_node + r" 2>&1 | grep -e '^Free blocks:' | sed -e 's/^Free blocks:\s\+//'")))
410     free_bytes = long(block_size * free_blocks)
411     # can't hurt to pad (the +50) it a bit since this is really just a guess
412     self._min_mb_for_resize = self._mb - long(free_bytes / MEGABYTE) + 50
413     self._resizeable = True
414     else:
415     parted_part = self._device._parted_disk.get_partition(int(self._orig_minor))
416 agaffney 301 parted_fs = parted_part.geom.file_system_open()
417 agaffney 826 resize_constraint = parted_fs.get_resize_constraint()
418     min_bytes = resize_constraint.min_size * self._device._sector_bytes
419     self._min_mb_for_resize = long(min_bytes / MEGABYTE) + 1
420     self._resizeable = True
421     except:
422     self._resizeable = False
423 agaffney 107
424 agaffney 509 ##
425 agaffney 514 # Returns whether or not the partition is extended
426 agaffney 107 def is_extended(self):
427     if self._type == "extended":
428     return True
429     else:
430     return False
431    
432 agaffney 509 ##
433 agaffney 514 # Returns whether or not the partition is logical
434 agaffney 107 def is_logical(self):
435 agaffney 492 if self._type == "free":
436 agaffney 639 if int(self._minor) + FREE_MINOR_FRAC_LOG == self._minor:
437 agaffney 492 return True
438     else:
439     return False
440 agaffney 497 elif archinfo[self._device._arch]['extended'] and self._minor > 4:
441 agaffney 107 return True
442 agaffney 492 else:
443     return False
444 agaffney 107
445 agaffney 509 ##
446 agaffney 514 # Returns a list of logical partitions if this is an extended partition
447 agaffney 107 def get_logicals(self):
448 agaffney 184 if not self.is_extended():
449     return None
450 agaffney 107 logicals = []
451 agaffney 184 parts = self._device._partitions.keys()
452     parts.sort()
453     for part in parts:
454     if part < 5: continue
455 agaffney 107 logicals.append(part)
456     logicals.sort()
457     return logicals
458    
459 agaffney 509 ##
460 agaffney 514 # Returns the extened parent partition if this is a logical partition (no longer used)
461 agaffney 107 def get_extended_parent(self):
462 agaffney 184 if not self.is_logical():
463     return None
464     else:
465     return self._device.get_partition_at(self._start, ignore_extended=0)
466 agaffney 107
467 agaffney 509 ##
468 agaffney 631 # Sets the options passed to mkfs
469     # @param mkfsopts Options passed to mkfs
470     def set_mkfsopts(self, mkfsopts):
471     self._mkfsopts = mkfsopts
472    
473     ##
474     # Returns the options passes to mkfs
475     def get_mkfsopts(self):
476     return self._mkfsopts
477    
478     ##
479 agaffney 514 # Sets the start sector for the partition
480     # @param start Start sector
481 agaffney 107 def set_start(self, start):
482 agaffney 635 self._start = long(start)
483 agaffney 107
484 agaffney 509 ##
485 agaffney 514 # Returns the start sector for the partition
486 agaffney 107 def get_start(self):
487 agaffney 635 return long(self._start)
488 agaffney 107
489 agaffney 509 ##
490 agaffney 514 # Sets the end sector of the partition
491     # @param end End sector
492 agaffney 107 def set_end(self, end):
493 agaffney 635 self._end = long(end)
494 agaffney 107
495 agaffney 509 ##
496 agaffney 514 # Returns end sector for the partition
497 agaffney 107 def get_end(self):
498 agaffney 635 return long(self._end)
499 agaffney 107
500 agaffney 509 ##
501 agaffney 514 # Returns size of partition in MB
502 agaffney 492 def get_mb(self):
503 agaffney 635 return long(self._mb)
504 agaffney 492
505 agaffney 509 ##
506 agaffney 514 # Sets size of partition in MB
507 agaffney 509 # @param mb Parameter description
508 agaffney 494 def set_mb(self, mb):
509 agaffney 635 self._mb = long(mb)
510 agaffney 494
511 agaffney 509 ##
512 agaffney 514 # Sets type of partition
513 agaffney 509 # @param type Parameter description
514 agaffney 107 def set_type(self, type):
515     self._type = type
516    
517 agaffney 509 ##
518 agaffney 514 # Returns type of partition
519 agaffney 107 def get_type(self):
520     return self._type
521    
522 agaffney 509 ##
523 agaffney 514 # Returns parent GLIStorageDevice object
524 agaffney 107 def get_device(self):
525     return self._device
526    
527 agaffney 509 ##
528 agaffney 514 # Sets minor of partition
529     # @param minor New minor
530 agaffney 107 def set_minor(self, minor):
531 agaffney 492 self._minor = float(minor)
532 agaffney 107
533 agaffney 509 ##
534 agaffney 514 # Returns minor of partition
535 agaffney 107 def get_minor(self):
536 agaffney 492 return float(self._minor)
537 agaffney 107
538 agaffney 509 ##
539 agaffney 514 # Sets the original minor of the partition
540 agaffney 509 # @param orig_minor Parameter description
541 agaffney 386 def set_orig_minor(self, orig_minor):
542     self._orig_minor = int(orig_minor)
543    
544 agaffney 509 ##
545 agaffney 514 # Returns the original minor of the partition
546 agaffney 386 def get_orig_minor(self):
547     return self._orig_minor
548    
549 agaffney 509 ##
550 agaffney 514 # Sets the mountpoint for the partition
551     # @param mountpoint Mountpoint
552 agaffney 107 def set_mountpoint(self, mountpoint):
553     self._mountpoint = mountpoint
554    
555 agaffney 509 ##
556 agaffney 514 # Returns the mountpoint for the partition
557 agaffney 107 def get_mountpoint(self):
558     return self._mountpoint
559    
560 agaffney 509 ##
561 agaffney 514 # Sets the mount options for the partition
562     # @param mountopts Mount options
563 agaffney 107 def set_mountopts(self, mountopts):
564     self._mountopts = mountopts
565    
566 agaffney 509 ##
567 agaffney 514 # Returns the mount options for the partition
568 agaffney 107 def get_mountopts(self):
569     return self._mountopts
570    
571 agaffney 509 ##
572 agaffney 514 # Set whether to format the partition
573 agaffney 523 # @param format Format this partition (True/False)
574 agaffney 107 def set_format(self, format):
575     self._format = format
576    
577 agaffney 509 ##
578 agaffney 514 # Returns whether to format the partition
579 agaffney 107 def get_format(self):
580     return self._format
581    
582 agaffney 509 ##
583 agaffney 523 # Returns whether the partition is resizeable
584     def is_resizeable(self):
585     return self._resizeable
586    
587     ##
588     # Returns minimum MB for resize
589     def get_min_mb_for_resize(self):
590     # if self.is_extended():
591     # min_size = self._start
592     # for part in self._device._partitions:
593     # if part < 5: continue
594     # if part.get_end > min_size: min_size = part.get_end()
595     # return min_size
596     # else:
597     if self._resizeable:
598     return self._min_mb_for_resize
599 agaffney 107 else:
600 agaffney 523 return -1
601 agaffney 107
602 agaffney 509 ##
603 agaffney 523 # Returns maximum MB for resize
604     def get_max_mb_for_resize(self):
605 agaffney 544 if self._resizeable:
606     free_minor = 0
607     if self.is_logical():
608 agaffney 639 free_minor = self._minor + FREE_MINOR_FRAC_LOG
609 agaffney 544 else:
610 agaffney 639 free_minor = self._minor + FREE_MINOR_FRAC_PRI
611 agaffney 544 if free_minor in self._device._partitions:
612     return self._mb + self._device._partitions[free_minor]._mb
613     else:
614     return self._mb
615 agaffney 523 else:
616 agaffney 544 return -1
617 agaffney 107
618 agaffney 509 ##
619 agaffney 544 # Resizes the partition
620     # @param mb New size in MB
621     def resize(self, mb):
622     free_minor = self._minor
623 agaffney 107 if self.is_logical():
624 agaffney 639 free_minor += FREE_MINOR_FRAC_LOG
625 agaffney 544 else:
626 agaffney 639 free_minor += FREE_MINOR_FRAC_PRI
627 agaffney 544 if mb < self._mb:
628     # Shrinking
629     if not free_minor in self._device._partitions:
630     self._device._partitions[free_minor] = Partition(self._device, free_minor, 0, 0, 0, "free", format=False, existing=False)
631     self._device._partitions[free_minor]._mb += self._mb - mb
632     self._mb = mb
633     elif mb == self._mb + self._device._partitions[free_minor]._mb:
634     # Using all available unallocated space
635     del self._device._partitions[free_minor]
636     self._mb = mb
637     elif mb > self._mb:
638     # Growing
639     self._device._partitions[free_minor]._mb = mb - self._mb
640     self._mb = mb
641 agaffney 107
642 agaffney 514 ##
643     # Returns a list of detected partitionable devices
644 agaffney 107 def detect_devices():
645     devices = []
646    
647     # Make sure sysfs exists
648 robbat2 687 # TODO: rewrite for 2.4 support
649 agaffney 107 if not os.path.exists("/sys/bus"):
650 agaffney 556 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "no sysfs found (you MUST use a kernel >2.6)")
651 agaffney 107 # Make sure /proc/partitions exists
652     if not os.path.exists("/proc/partitions"):
653 agaffney 556 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "/proc/partitions does not exist! Please make sure procfs is in your kernel and mounted!")
654 agaffney 107
655     # Load /proc/partitions into the variable 'partitions'
656     partitions = []
657     for line in open("/proc/partitions"):
658 agaffney 556 if len(line.split()) < 4 or not line.split()[0].isdigit() or not line.split()[1].isdigit():
659 agaffney 107 continue
660    
661     # Get the major, minor and device name
662     major = line.split()[0]
663     minor = line.split()[1]
664     device = "/dev/" + line.split()[3]
665    
666     if not major.isdigit() or not minor.isdigit():
667     continue
668    
669     major = int(major)
670     minor = int(minor)
671    
672     # If there is no /dev/'device_name', then scan
673     # all the devices in /dev to try and find a
674     # devices with the same major and minor
675     if not os.path.exists(device):
676     device = None
677     for path, dirs, files in os.walk("/dev"):
678 agaffney 535 for d_file in files:
679     full_file = os.path.join(path, d_file)
680 agaffney 107 if not os.path.exists(full_file):
681     continue
682     statres = os.stat(full_file)
683     fmaj = os.major(statres.st_rdev)
684     fmin = os.minor(statres.st_rdev)
685     if fmaj == major and fmin == minor:
686     device = full_file
687     break
688     if not device:
689     continue
690    
691     partitions.append(( major, minor, device ))
692    
693     # Scan sysfs for the devices of type 'x'
694     # 'x' being a member of the list below:
695 robbat2 687 # TODO: rewrite for 2.4 support
696 agaffney 107 for dev_type in [ "ide", "scsi" ]: # Other device types? usb? fw?
697     if os.path.exists("/sys/bus/" + dev_type):
698     sysfs_devices = os.listdir("/sys/bus/"+dev_type+"/devices")
699    
700     # For each device in the devices on that bus
701     for sysfs_device in sysfs_devices:
702 agaffney 556 dev_file = "/sys/bus/" + dev_type + "/devices/" + sysfs_device + "/block/dev"
703 agaffney 107
704     # If the file is not a block device, loop
705     if not os.path.exists(dev_file):
706     continue
707    
708     # Get the major and minor info
709     try:
710     major, minor = open(dev_file).read().split(":")
711     major = int(major)
712     minor = int(minor)
713     except:
714 agaffney 556 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "invalid major minor in " + dev_file)
715 agaffney 107
716     # Find a device listed in /proc/partitions
717     # that has the same minor and major as our
718     # current block device.
719     for record in partitions:
720     if major == record[0] and minor == record[1]:
721     devices.append(record[2])
722 agaffney 595
723     # For testing the partitioning code
724     if GLIUtility.is_file("/tmp/disk.img"):
725     devices.append("/tmp/disk.img")
726    
727 agaffney 107 # We have assembled the list of devices, so return it
728     return devices

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