/[gli]/trunk/src/GLIStorageDevice.py
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Tue Sep 20 23:55:49 2005 UTC (15 years, 1 month ago) by agaffney
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prevent do_recommended() from being run twice

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 914 _applied_recommended = False
43 agaffney 492
44 agaffney 509 ##
45 agaffney 513 # Initialization function for GLIStorageDevice class
46     # @param device Device node (e.g. /dev/hda) of device being represented
47     # @param arch="x86" Architecture that we're partition for (defaults to 'x86' for now)
48 agaffney 731 def __init__(self, device, arch="x86", set_geometry=True, virtual=False, size_known=False):
49 agaffney 107 self._device = device
50     self._partitions = {}
51     self._geometry = {'cylinders': 0, 'heads': 0, 'sectors': 0, 'sectorsize': 512}
52     self._total_bytes = 0
53     self._cylinder_bytes = 0
54 agaffney 492 self._arch = arch
55 agaffney 107 self._parted_dev = parted.PedDevice.get(self._device)
56 agaffney 595 try:
57     self._parted_disk = parted.PedDisk.new(self._parted_dev)
58     except:
59     self._parted_disk = self._parted_dev.disk_new_fresh(parted.disk_type_get(archinfo[self._arch]['disklabel']))
60     self._disklabel = self._parted_disk.type.name
61 agaffney 596 if set_geometry:
62     self.set_disk_geometry_from_disk()
63 agaffney 107
64 agaffney 509 ##
65 agaffney 513 # Sets disk geometry info from disk. This function is used internally by __init__()
66 agaffney 107 def set_disk_geometry_from_disk(self):
67     self._total_bytes = self._parted_dev.length * self._parted_dev.sector_size
68 agaffney 205 self._geometry['heads'], self._geometry['sectors'], self._geometry['cylinders'] = self._parted_dev.heads, self._parted_dev.sectors, self._parted_dev.cylinders
69 agaffney 212 self._sector_bytes = self._parted_dev.sector_size
70     self._cylinder_bytes = self._geometry['heads'] * self._geometry['sectors'] * self._sector_bytes
71     self._total_sectors = self._parted_dev.length
72 agaffney 107 self._sectors_in_cylinder = self._geometry['heads'] * self._geometry['sectors']
73 agaffney 635 self._total_mb = long(self._total_bytes / MEGABYTE)
74 agaffney 107
75 agaffney 509 ##
76 agaffney 513 # Sets partition info from disk.
77 agaffney 107 def set_partitions_from_disk(self):
78 agaffney 492 last_part = 0
79     last_log_part = 4
80 agaffney 107 parted_part = self._parted_disk.next_partition()
81 agaffney 492 while parted_part:
82 agaffney 635 part_mb = long((parted_part.geom.end - parted_part.geom.start + 1) * self._sector_bytes / MEGABYTE)
83 agaffney 492 if parted_part.num >= 1:
84 agaffney 113 fs_type = ""
85     if parted_part.fs_type != None: fs_type = parted_part.fs_type.name
86     if parted_part.type == 2: fs_type = "extended"
87 agaffney 501 if archinfo[self._arch]['extended'] and parted_part.num > 4:
88     last_log_part = parted_part.num
89     else:
90     last_part = parted_part.num
91 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)
92     elif parted_part.type_name == "free":
93 agaffney 640 # parent_part = self.get_partition_at(parted_part.geom.start, ignore_extended=0)
94     # if parent_part:
95 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():
96 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)
97 agaffney 492 last_log_part += 1
98     else:
99 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)
100 agaffney 492 last_part += 1
101     parted_part = self._parted_disk.next_partition(parted_part)
102 agaffney 107
103 agaffney 509 ##
104 agaffney 639 # Imports partition info from the install profile partition structure
105 agaffney 513 # @param ips Parameter structure returned from install_profile.get_partition_tables()
106 agaffney 492 def set_partitions_from_install_profile_structure(self, ips):
107 agaffney 596 for part in ips:
108     tmppart = ips[part]
109     existing = False
110     if tmppart['origminor'] and not tmppart['format']:
111     existing = True
112 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'])
113 agaffney 492
114 agaffney 509 ##
115 agaffney 513 # Returns name of device (e.g. /dev/hda) being represented
116 agaffney 107 def get_device(self):
117     return self._device
118    
119 agaffney 509 ##
120 agaffney 912 # Uses magic to apply the recommended partition layout
121     def do_recommended(self):
122     free_minor = 0
123 agaffney 914 if self._applied_recommended:
124     raise GLIException("RecommendedPartitionLayoutError", "notice", "do_recommended", "You have already applied the recommended partition layout.")
125 agaffney 912 parts = self._partitions.keys()
126     parts.sort()
127     for part in parts:
128     if self._partitions[part].get_type() == "free" and self._partitions[part].get_mb() >= 4096:
129     free_minor = part
130     if not free_minor:
131     raise GLIException("RecommendedPartitionLayoutError", "notice", "do_recommended", "You do not have atleast 4GB of concurrent unallocated space. Please remove some partitions and try again.")
132     if not self._partitions[free_minor].is_logical() and archinfo[self._arch]['extended'] and free_minor > 2:
133     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.")
134     self.add_partition(free_minor, 256, 0, 0, "ext2")
135     self.add_partition(free_minor+1, 1024, 0, 0, "linux-swap")
136     self.add_partition(free_minor+2, self._partitions[free_minor+2].get_mb(), 0, 0, "ext3")
137 agaffney 914 self._applied_recommended = True
138 agaffney 912 return True
139    
140     ##
141 agaffney 513 # Combines free space and closes gaps in minor numbers. This is used internally
142 agaffney 494 def tidy_partitions(self):
143     last_minor = 0
144     last_log_minor = 4
145     last_free = 0
146     last_log_free = 0
147     parts = self._partitions.keys()
148     parts.sort()
149     for part in parts:
150 agaffney 497 if archinfo[self._arch]['extended'] and part > 4: break
151 agaffney 494 tmppart = self._partitions[part]
152     if tmppart.get_type() == "extended":
153     for part_log in parts:
154 agaffney 639 if part_log < (4 + FREE_MINOR_FRAC_LOG): continue
155 agaffney 494 tmppart_log = self._partitions[part_log]
156     if tmppart_log.get_type() == "free":
157 agaffney 495 if last_log_minor < last_log_free:
158     self._partitions[last_log_free].set_mb(self._partitions[last_log_free].get_mb()+tmppart_log.get_mb())
159     del self._partitions[part_log]
160 agaffney 494 else:
161 agaffney 495 if not last_log_free:
162 agaffney 639 last_log_free = last_log_minor + FREE_MINOR_FRAC_LOG
163 agaffney 544 else:
164 agaffney 627 last_log_free = part_log
165 agaffney 495 tmppart_log.set_minor(last_log_free)
166     self._partitions[last_log_free] = tmppart_log
167     if part_log != last_log_free: del self._partitions[part_log]
168 agaffney 494 else:
169     if part_log > (last_log_minor + 1):
170     tmppart_log.set_minor(last_log_minor + 1)
171 agaffney 495 last_log_minor = last_log_minor + 1
172     self._partitions[last_log_minor] = tmppart_log
173     del self._partitions[part_log]
174 agaffney 544 else:
175     last_log_minor = part_log
176 agaffney 627 elif tmppart.get_type() == "free":
177 agaffney 495 if last_minor < last_free:
178     self._partitions[last_free].set_mb(self._partitions[last_free].get_mb()+tmppart.get_mb())
179     del self._partitions[part]
180 agaffney 494 else:
181 agaffney 495 if not last_free:
182 agaffney 639 last_free = last_minor + FREE_MINOR_FRAC_PRI
183 agaffney 544 else:
184     last_free = part
185 agaffney 495 tmppart.set_minor(last_free)
186     self._partitions[last_free] = tmppart
187     if part != last_free: del self._partitions[part]
188 agaffney 494 else:
189     if part > (last_minor + 1):
190     tmppart.set_minor(last_minor + 1)
191 agaffney 495 last_minor = last_minor + 1
192     self._partitions[last_minor] = tmppart
193     del self._partitions[part]
194 agaffney 544 else:
195     last_minor = part
196 agaffney 494
197 agaffney 509 ##
198 agaffney 513 # Adds a new partition to the partition info
199     # @param free_minor minor of unallocated space partition is being created in
200     # @param mb size of partition in MB
201     # @param start Start sector (only used for existing partitions)
202     # @param end End sector (only used for existing partitions)
203     # @param type Partition type (ext2, ext3, fat32, linux-swap, free, extended, etc.)
204     # @param mountpoint='' Partition mountpoint
205     # @param mountopts='' Partition mount options
206 agaffney 635 # @param mkfsopts='' Additional mkfs options
207     def add_partition(self, free_minor, mb, start, end, type, mountpoint='', mountopts='',mkfsopts=''):
208 agaffney 492 new_minor = int(free_minor) + 1
209     if self._partitions.has_key(new_minor):
210 agaffney 107 parts = self._partitions.keys()
211     parts.sort()
212     parts.reverse()
213     hole_at = 0
214     for i in range(1, parts[0]+1):
215 agaffney 492 if i <= new_minor: continue
216     if not self._partitions.has_key(i):
217 agaffney 107 hole_at = i
218     break
219     stopscooting = 0
220     for i in parts:
221     if stopscooting: break
222 agaffney 492 if i >= hole_at and hole_at: continue
223     if i >= new_minor:
224 agaffney 107 self._partitions[i].set_minor(i+1)
225     self._partitions[i+1] = self._partitions[i]
226 agaffney 492 if i == new_minor: stopscooting = 1
227 agaffney 494 if mb != self._partitions[free_minor].get_mb():
228     old_free_mb = self._partitions[free_minor].get_mb()
229     del self._partitions[free_minor]
230 agaffney 497 if archinfo[self._arch]['extended'] and new_minor >= 5:
231 agaffney 639 free_minor = new_minor + FREE_MINOR_FRAC_LOG
232 agaffney 494 else:
233 agaffney 639 free_minor = new_minor + FREE_MINOR_FRAC_PRI
234 agaffney 494 self._partitions[free_minor] = Partition(self, free_minor, old_free_mb-mb, 0, 0, "free")
235     else:
236     del self._partitions[free_minor]
237 agaffney 635 self._partitions[new_minor] = Partition(self, new_minor, mb, start, end, type, mountpoint=mountpoint, mountopts=mountopts,mkfsopts=mkfsopts)
238 agaffney 494 if type == "extended":
239 agaffney 639 self._partitions[4 + FREE_MINOR_FRAC_LOG] = Partition(self, (4 + FREE_MINOR_FRAC_LOG), mb, 0, 0, "free")
240 agaffney 494 self.tidy_partitions()
241 agaffney 107
242 agaffney 509 ##
243 agaffney 513 # Removes partition from partition info
244     # @param minor Minor of partition to remove
245 agaffney 107 def remove_partition(self, minor):
246 agaffney 492 tmppart = self._partitions[int(minor)]
247     free_minor = 0
248     if tmppart.is_logical():
249 agaffney 639 free_minor = int(minor-1)+FREE_MINOR_FRAC_LOG
250 agaffney 492 else:
251 agaffney 639 free_minor = int(minor-1)+FREE_MINOR_FRAC_PRI
252     if free_minor in self._partitions:
253     self._partitions[free_minor].set_mb(self._partitions[free_minor].get_mb() + tmppart.get_mb())
254     else:
255     self._partitions[free_minor] = Partition(self, free_minor, tmppart.get_mb(), 0, 0, "free", format=False, existing=False)
256 agaffney 107 del self._partitions[int(minor)]
257 agaffney 494 self.tidy_partitions()
258 agaffney 107
259 agaffney 509 ##
260 agaffney 513 # Returns an ordered list (disk order) of partition minors
261 agaffney 107 def get_ordered_partition_list(self):
262 codeman 625 parts = self._partitions.keys()
263     parts.sort()
264     partlist = []
265 agaffney 492 tmppart = None
266     for part in parts:
267 agaffney 639 if archinfo[self._arch]['extended'] and part > (4 + FREE_MINOR_FRAC_PRI): break
268 agaffney 107 tmppart = self._partitions[part]
269 agaffney 492 partlist.append(part)
270 agaffney 107 if tmppart.is_extended():
271     for part_log in parts:
272 agaffney 639 if part_log < (4 + FREE_MINOR_FRAC_LOG): continue
273 agaffney 492 partlist.append(part_log)
274 agaffney 107 return partlist
275    
276 agaffney 509 ##
277 agaffney 513 # Returns partition info in a format suitable for passing to install_profile.set_partition_tables()
278 agaffney 107 def get_install_profile_structure(self):
279     devdic = {}
280     for part in self._partitions:
281     tmppart = self._partitions[part]
282 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 }
283 agaffney 107 return devdic
284    
285 agaffney 509 ##
286 agaffney 513 # Returns the minor of the extended partition, if any
287 agaffney 183 def get_extended_partition(self):
288     for part in self._partitions:
289     tmppart = self._partitions[part]
290     if tmppart.is_extended():
291     return part
292 agaffney 184 return 0
293 agaffney 183
294 agaffney 509 ##
295 agaffney 624 # Returns the drive model
296     def get_model(self):
297     return self._parted_dev.model
298    
299     ##
300 agaffney 596 # Sets the disklabel type
301     def set_disklabel(self, disklabel):
302     self._disklabel = disklabel
303    
304     ##
305     # Returns the disklabel type
306     def get_disklabel(self):
307     return self._disklabel
308    
309     ##
310 agaffney 513 # Returns the number of sectors on the device
311 agaffney 107 def get_num_sectors(self):
312 agaffney 635 return long(self._total_sectors)
313 agaffney 107
314 agaffney 509 ##
315 agaffney 513 # Returns the size of a cylinder in bytes
316 agaffney 107 def get_cylinder_size(self):
317 agaffney 635 return long(self._cylinder_bytes)
318 agaffney 107
319 agaffney 509 ##
320 agaffney 513 # Returns the size of a sector in bytes
321 agaffney 212 def get_sector_size(self):
322 agaffney 635 return long(self._sector_bytes)
323 agaffney 212
324 agaffney 509 ##
325 agaffney 513 # Returns the number of cylinders
326 agaffney 107 def get_num_cylinders(self):
327 agaffney 635 return long(self._geometry['cylinders'])
328 agaffney 107
329 agaffney 509 ##
330 agaffney 513 # Returns the total number of bytes on the device
331 agaffney 107 def get_drive_bytes(self):
332 agaffney 635 return long(self._total_bytes)
333 agaffney 107
334 agaffney 509 ##
335 agaffney 513 # Returns the total number of MB on the device
336 agaffney 492 def get_total_mb(self):
337     return self._total_mb
338    
339 agaffney 509 ##
340 agaffney 513 # Returns partition info dictionary
341 agaffney 107 def get_partitions(self):
342     return self._partitions
343    
344 agaffney 509 ##
345 agaffney 513 # Prints disk geometry to STDOUT (no longer used)
346 agaffney 107 def print_geometry(self):
347     print self._total_bytes, self._geometry
348    
349 agaffney 513 ##
350     # This class represents a partition within a GLIStorageDevice object
351 agaffney 107 class Partition:
352     "Class representing a single partition within a Device object"
353    
354     _device = None
355 agaffney 492 _minor = 0
356     _orig_minor = 0
357     _start = 0
358     _end = 0
359 agaffney 107 _type = None
360     _mountpoint = None
361     _mountopts = None
362     _format = None
363     _resizeable = None
364 agaffney 523 _min_mb_for_resize = 0
365 agaffney 492 _mb = 0
366 agaffney 631 _mkfsopts = None
367 agaffney 107
368 agaffney 509 ##
369 agaffney 514 # Initialization function for the Partition class
370     # @param device Parent GLIStorageDevice object
371     # @param minor Minor of partition
372     # @param mb Parameter Size of partition in MB
373     # @param start Parameter Start sector of partition
374     # @param end Parameter Start sector of partition
375     # @param type Parameter Type of partition (ext2, ext3, fat32, linux-swap, free, extended, etc.)
376     # @param mountpoint='' Mountpoint of partition
377     # @param mountopts='' Mount options of partition
378 agaffney 635 # @param mkfsopts='' Additional mkfs options
379 agaffney 514 # @param format=True Format partition
380     # @param existing=False This partition exists on disk
381 agaffney 631 def __init__(self, device, minor, mb, start, end, type, mountpoint='', mountopts='', format=True, existing=False, origminor=0, mkfsopts=''):
382 agaffney 107 self._device = device
383 agaffney 492 self._minor = float(minor)
384 agaffney 635 self._start = long(start)
385     self._end = long(end)
386 agaffney 492 self._type = type or "unknown"
387 agaffney 107 self._mountpoint = mountpoint
388     self._mountopts = mountopts
389     self._format = format
390 agaffney 492 self._mb = mb
391 agaffney 596 self._orig_minor = origminor
392 agaffney 631 self._mkfsopts = mkfsopts
393 agaffney 596 if type != "free":
394     if existing and not origminor:
395     self._orig_minor = self._minor
396     self._minor = int(self._minor)
397     self._orig_minor = int(self._orig_minor)
398 agaffney 231 if existing:
399 agaffney 826 try:
400     parted_part = device._parted_disk.get_partition(self._orig_minor)
401     label_type = device._parted_disk.type.name
402     if label_type == "loop":
403     dev_node = device._device
404     else:
405     dev_node = device._device + str(self._orig_minor)
406     # print "dev_node = " + dev_node
407     if type == "ntfs":
408     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 .\+//'"))
409     self._min_mb_for_resize = long(min_bytes / MEGABYTE) + 1
410     self._resizeable = True
411     elif type == "ext2" or type == "ext3":
412     block_size = long(string.strip(commands.getoutput("dumpe2fs -h " + dev_node + r" 2>&1 | grep -e '^Block size:' | sed -e 's/^Block size:\s\+//'")))
413     free_blocks = long(string.strip(commands.getoutput("dumpe2fs -h " + dev_node + r" 2>&1 | grep -e '^Free blocks:' | sed -e 's/^Free blocks:\s\+//'")))
414     free_bytes = long(block_size * free_blocks)
415     # can't hurt to pad (the +50) it a bit since this is really just a guess
416     self._min_mb_for_resize = self._mb - long(free_bytes / MEGABYTE) + 50
417     self._resizeable = True
418     else:
419     parted_part = self._device._parted_disk.get_partition(int(self._orig_minor))
420 agaffney 301 parted_fs = parted_part.geom.file_system_open()
421 agaffney 826 resize_constraint = parted_fs.get_resize_constraint()
422     min_bytes = resize_constraint.min_size * self._device._sector_bytes
423     self._min_mb_for_resize = long(min_bytes / MEGABYTE) + 1
424     self._resizeable = True
425     except:
426     self._resizeable = False
427 agaffney 107
428 agaffney 509 ##
429 agaffney 514 # Returns whether or not the partition is extended
430 agaffney 107 def is_extended(self):
431     if self._type == "extended":
432     return True
433     else:
434     return False
435    
436 agaffney 509 ##
437 agaffney 514 # Returns whether or not the partition is logical
438 agaffney 107 def is_logical(self):
439 agaffney 492 if self._type == "free":
440 agaffney 639 if int(self._minor) + FREE_MINOR_FRAC_LOG == self._minor:
441 agaffney 492 return True
442     else:
443     return False
444 agaffney 497 elif archinfo[self._device._arch]['extended'] and self._minor > 4:
445 agaffney 107 return True
446 agaffney 492 else:
447     return False
448 agaffney 107
449 agaffney 509 ##
450 agaffney 514 # Returns a list of logical partitions if this is an extended partition
451 agaffney 107 def get_logicals(self):
452 agaffney 184 if not self.is_extended():
453     return None
454 agaffney 107 logicals = []
455 agaffney 184 parts = self._device._partitions.keys()
456     parts.sort()
457     for part in parts:
458     if part < 5: continue
459 agaffney 107 logicals.append(part)
460     logicals.sort()
461     return logicals
462    
463 agaffney 509 ##
464 agaffney 514 # Returns the extened parent partition if this is a logical partition (no longer used)
465 agaffney 107 def get_extended_parent(self):
466 agaffney 184 if not self.is_logical():
467     return None
468     else:
469     return self._device.get_partition_at(self._start, ignore_extended=0)
470 agaffney 107
471 agaffney 509 ##
472 agaffney 631 # Sets the options passed to mkfs
473     # @param mkfsopts Options passed to mkfs
474     def set_mkfsopts(self, mkfsopts):
475     self._mkfsopts = mkfsopts
476    
477     ##
478     # Returns the options passes to mkfs
479     def get_mkfsopts(self):
480     return self._mkfsopts
481    
482     ##
483 agaffney 514 # Sets the start sector for the partition
484     # @param start Start sector
485 agaffney 107 def set_start(self, start):
486 agaffney 635 self._start = long(start)
487 agaffney 107
488 agaffney 509 ##
489 agaffney 514 # Returns the start sector for the partition
490 agaffney 107 def get_start(self):
491 agaffney 635 return long(self._start)
492 agaffney 107
493 agaffney 509 ##
494 agaffney 514 # Sets the end sector of the partition
495     # @param end End sector
496 agaffney 107 def set_end(self, end):
497 agaffney 635 self._end = long(end)
498 agaffney 107
499 agaffney 509 ##
500 agaffney 514 # Returns end sector for the partition
501 agaffney 107 def get_end(self):
502 agaffney 635 return long(self._end)
503 agaffney 107
504 agaffney 509 ##
505 agaffney 514 # Returns size of partition in MB
506 agaffney 492 def get_mb(self):
507 agaffney 635 return long(self._mb)
508 agaffney 492
509 agaffney 509 ##
510 agaffney 514 # Sets size of partition in MB
511 agaffney 509 # @param mb Parameter description
512 agaffney 494 def set_mb(self, mb):
513 agaffney 635 self._mb = long(mb)
514 agaffney 494
515 agaffney 509 ##
516 agaffney 514 # Sets type of partition
517 agaffney 509 # @param type Parameter description
518 agaffney 107 def set_type(self, type):
519     self._type = type
520    
521 agaffney 509 ##
522 agaffney 514 # Returns type of partition
523 agaffney 107 def get_type(self):
524     return self._type
525    
526 agaffney 509 ##
527 agaffney 514 # Returns parent GLIStorageDevice object
528 agaffney 107 def get_device(self):
529     return self._device
530    
531 agaffney 509 ##
532 agaffney 514 # Sets minor of partition
533     # @param minor New minor
534 agaffney 107 def set_minor(self, minor):
535 agaffney 492 self._minor = float(minor)
536 agaffney 107
537 agaffney 509 ##
538 agaffney 514 # Returns minor of partition
539 agaffney 107 def get_minor(self):
540 agaffney 492 return float(self._minor)
541 agaffney 107
542 agaffney 509 ##
543 agaffney 514 # Sets the original minor of the partition
544 agaffney 509 # @param orig_minor Parameter description
545 agaffney 386 def set_orig_minor(self, orig_minor):
546     self._orig_minor = int(orig_minor)
547    
548 agaffney 509 ##
549 agaffney 514 # Returns the original minor of the partition
550 agaffney 386 def get_orig_minor(self):
551     return self._orig_minor
552    
553 agaffney 509 ##
554 agaffney 514 # Sets the mountpoint for the partition
555     # @param mountpoint Mountpoint
556 agaffney 107 def set_mountpoint(self, mountpoint):
557     self._mountpoint = mountpoint
558    
559 agaffney 509 ##
560 agaffney 514 # Returns the mountpoint for the partition
561 agaffney 107 def get_mountpoint(self):
562     return self._mountpoint
563    
564 agaffney 509 ##
565 agaffney 514 # Sets the mount options for the partition
566     # @param mountopts Mount options
567 agaffney 107 def set_mountopts(self, mountopts):
568     self._mountopts = mountopts
569    
570 agaffney 509 ##
571 agaffney 514 # Returns the mount options for the partition
572 agaffney 107 def get_mountopts(self):
573     return self._mountopts
574    
575 agaffney 509 ##
576 agaffney 514 # Set whether to format the partition
577 agaffney 523 # @param format Format this partition (True/False)
578 agaffney 107 def set_format(self, format):
579     self._format = format
580    
581 agaffney 509 ##
582 agaffney 514 # Returns whether to format the partition
583 agaffney 107 def get_format(self):
584     return self._format
585    
586 agaffney 509 ##
587 agaffney 523 # Returns whether the partition is resizeable
588     def is_resizeable(self):
589     return self._resizeable
590    
591     ##
592     # Returns minimum MB for resize
593     def get_min_mb_for_resize(self):
594     # if self.is_extended():
595     # min_size = self._start
596     # for part in self._device._partitions:
597     # if part < 5: continue
598     # if part.get_end > min_size: min_size = part.get_end()
599     # return min_size
600     # else:
601     if self._resizeable:
602     return self._min_mb_for_resize
603 agaffney 107 else:
604 agaffney 523 return -1
605 agaffney 107
606 agaffney 509 ##
607 agaffney 523 # Returns maximum MB for resize
608     def get_max_mb_for_resize(self):
609 agaffney 544 if self._resizeable:
610     free_minor = 0
611     if self.is_logical():
612 agaffney 639 free_minor = self._minor + FREE_MINOR_FRAC_LOG
613 agaffney 544 else:
614 agaffney 639 free_minor = self._minor + FREE_MINOR_FRAC_PRI
615 agaffney 544 if free_minor in self._device._partitions:
616     return self._mb + self._device._partitions[free_minor]._mb
617     else:
618     return self._mb
619 agaffney 523 else:
620 agaffney 544 return -1
621 agaffney 107
622 agaffney 509 ##
623 agaffney 544 # Resizes the partition
624     # @param mb New size in MB
625     def resize(self, mb):
626     free_minor = self._minor
627 agaffney 107 if self.is_logical():
628 agaffney 639 free_minor += FREE_MINOR_FRAC_LOG
629 agaffney 544 else:
630 agaffney 639 free_minor += FREE_MINOR_FRAC_PRI
631 agaffney 544 if mb < self._mb:
632     # Shrinking
633     if not free_minor in self._device._partitions:
634     self._device._partitions[free_minor] = Partition(self._device, free_minor, 0, 0, 0, "free", format=False, existing=False)
635     self._device._partitions[free_minor]._mb += self._mb - mb
636     self._mb = mb
637     elif mb == self._mb + self._device._partitions[free_minor]._mb:
638     # Using all available unallocated space
639     del self._device._partitions[free_minor]
640     self._mb = mb
641     elif mb > self._mb:
642     # Growing
643     self._device._partitions[free_minor]._mb = mb - self._mb
644     self._mb = mb
645 agaffney 107
646 agaffney 514 ##
647     # Returns a list of detected partitionable devices
648 agaffney 107 def detect_devices():
649     devices = []
650    
651     # Make sure sysfs exists
652 robbat2 687 # TODO: rewrite for 2.4 support
653 agaffney 107 if not os.path.exists("/sys/bus"):
654 agaffney 556 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "no sysfs found (you MUST use a kernel >2.6)")
655 agaffney 107 # Make sure /proc/partitions exists
656     if not os.path.exists("/proc/partitions"):
657 agaffney 556 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "/proc/partitions does not exist! Please make sure procfs is in your kernel and mounted!")
658 agaffney 107
659     # Load /proc/partitions into the variable 'partitions'
660     partitions = []
661     for line in open("/proc/partitions"):
662 agaffney 556 if len(line.split()) < 4 or not line.split()[0].isdigit() or not line.split()[1].isdigit():
663 agaffney 107 continue
664    
665     # Get the major, minor and device name
666     major = line.split()[0]
667     minor = line.split()[1]
668     device = "/dev/" + line.split()[3]
669    
670     if not major.isdigit() or not minor.isdigit():
671     continue
672    
673     major = int(major)
674     minor = int(minor)
675    
676     # If there is no /dev/'device_name', then scan
677     # all the devices in /dev to try and find a
678     # devices with the same major and minor
679     if not os.path.exists(device):
680     device = None
681     for path, dirs, files in os.walk("/dev"):
682 agaffney 535 for d_file in files:
683     full_file = os.path.join(path, d_file)
684 agaffney 107 if not os.path.exists(full_file):
685     continue
686     statres = os.stat(full_file)
687     fmaj = os.major(statres.st_rdev)
688     fmin = os.minor(statres.st_rdev)
689     if fmaj == major and fmin == minor:
690     device = full_file
691     break
692     if not device:
693     continue
694    
695     partitions.append(( major, minor, device ))
696    
697     # Scan sysfs for the devices of type 'x'
698     # 'x' being a member of the list below:
699 robbat2 687 # TODO: rewrite for 2.4 support
700 agaffney 107 for dev_type in [ "ide", "scsi" ]: # Other device types? usb? fw?
701     if os.path.exists("/sys/bus/" + dev_type):
702     sysfs_devices = os.listdir("/sys/bus/"+dev_type+"/devices")
703    
704     # For each device in the devices on that bus
705     for sysfs_device in sysfs_devices:
706 agaffney 556 dev_file = "/sys/bus/" + dev_type + "/devices/" + sysfs_device + "/block/dev"
707 agaffney 107
708     # If the file is not a block device, loop
709     if not os.path.exists(dev_file):
710     continue
711    
712     # Get the major and minor info
713     try:
714     major, minor = open(dev_file).read().split(":")
715     major = int(major)
716     minor = int(minor)
717     except:
718 agaffney 556 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "invalid major minor in " + dev_file)
719 agaffney 107
720     # Find a device listed in /proc/partitions
721     # that has the same minor and major as our
722     # current block device.
723     for record in partitions:
724     if major == record[0] and minor == record[1]:
725     devices.append(record[2])
726 agaffney 595
727     # For testing the partitioning code
728     if GLIUtility.is_file("/tmp/disk.img"):
729     devices.append("/tmp/disk.img")
730    
731 agaffney 107 # We have assembled the list of devices, so return it
732     return devices

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