/[gli]/trunk/src/GLIStorageDevice.py
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Fri Sep 23 02:02:09 2005 UTC (15 years, 1 month ago) by agaffney
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add clear_partitions() function

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 agaffney 916 recommended_parts = [ { 'type': "ext2", 'size': 256, 'mountpoint': "/boot" },
123     { 'type': "linux-swap", 'size': 1024, 'mountpoint': "" },
124     { 'type': "ext3", 'size': "*", 'mountpoint': "/" } ]
125     to_create = []
126     parts = self.get_ordered_partition_list()
127 agaffney 912 for part in parts:
128     if self._partitions[part].get_type() == "free" and self._partitions[part].get_mb() >= 4096:
129     free_minor = part
130 agaffney 916 break
131 agaffney 912 if not free_minor:
132     raise GLIException("RecommendedPartitionLayoutError", "notice", "do_recommended", "You do not have atleast 4GB of concurrent unallocated space. Please remove some partitions and try again.")
133 agaffney 916 remaining_free = self._partitions[free_minor].get_mb()
134     for newpart in recommended_parts:
135 agaffney 923 if archinfo[self._arch]['extended'] and free_minor == (3 + FREE_MINOR_FRAC_PRI) and not newpart == recommended_parts[-1]:
136 agaffney 916 if self.get_extended_partition():
137     raise GLIException("RecommendedPartitionLayoutError", "notice", "do_recommended", "This code is not yet robust enough to handle automatic partitioning with your current layout.")
138     to_create.append({ 'type': "extended", 'size': remaining_free, 'mountpoint': "", 'free_minor': free_minor })
139     free_minor = 4 + FREE_MINOR_FRAC_LOG
140     newpart['free_minor'] = free_minor
141     to_create.append(newpart)
142     free_minor = free_minor + 1
143     if not newpart['size'] == "*":
144     remaining_free = remaining_free - newpart['size']
145     for newpart in to_create:
146     if newpart['size'] == "*":
147     newpart['size'] = self._partitions[newpart['free_minor']].get_mb()
148     self.add_partition(newpart['free_minor'], newpart['size'], 0, 0, newpart['type'], mountpoint=newpart['mountpoint'])
149 agaffney 912
150     ##
151 agaffney 513 # Combines free space and closes gaps in minor numbers. This is used internally
152 agaffney 494 def tidy_partitions(self):
153     last_minor = 0
154     last_log_minor = 4
155     last_free = 0
156     last_log_free = 0
157     parts = self._partitions.keys()
158     parts.sort()
159     for part in parts:
160 agaffney 497 if archinfo[self._arch]['extended'] and part > 4: break
161 agaffney 494 tmppart = self._partitions[part]
162     if tmppart.get_type() == "extended":
163     for part_log in parts:
164 agaffney 639 if part_log < (4 + FREE_MINOR_FRAC_LOG): continue
165 agaffney 494 tmppart_log = self._partitions[part_log]
166     if tmppart_log.get_type() == "free":
167 agaffney 495 if last_log_minor < last_log_free:
168     self._partitions[last_log_free].set_mb(self._partitions[last_log_free].get_mb()+tmppart_log.get_mb())
169     del self._partitions[part_log]
170 agaffney 494 else:
171 agaffney 495 if not last_log_free:
172 agaffney 639 last_log_free = last_log_minor + FREE_MINOR_FRAC_LOG
173 agaffney 544 else:
174 agaffney 627 last_log_free = part_log
175 agaffney 495 tmppart_log.set_minor(last_log_free)
176     self._partitions[last_log_free] = tmppart_log
177     if part_log != last_log_free: del self._partitions[part_log]
178 agaffney 494 else:
179     if part_log > (last_log_minor + 1):
180     tmppart_log.set_minor(last_log_minor + 1)
181 agaffney 495 last_log_minor = last_log_minor + 1
182     self._partitions[last_log_minor] = tmppart_log
183     del self._partitions[part_log]
184 agaffney 544 else:
185     last_log_minor = part_log
186 agaffney 627 elif tmppart.get_type() == "free":
187 agaffney 495 if last_minor < last_free:
188     self._partitions[last_free].set_mb(self._partitions[last_free].get_mb()+tmppart.get_mb())
189     del self._partitions[part]
190 agaffney 494 else:
191 agaffney 495 if not last_free:
192 agaffney 639 last_free = last_minor + FREE_MINOR_FRAC_PRI
193 agaffney 544 else:
194     last_free = part
195 agaffney 495 tmppart.set_minor(last_free)
196     self._partitions[last_free] = tmppart
197     if part != last_free: del self._partitions[part]
198 agaffney 494 else:
199     if part > (last_minor + 1):
200     tmppart.set_minor(last_minor + 1)
201 agaffney 495 last_minor = last_minor + 1
202     self._partitions[last_minor] = tmppart
203     del self._partitions[part]
204 agaffney 544 else:
205     last_minor = part
206 agaffney 494
207 agaffney 509 ##
208 agaffney 513 # Adds a new partition to the partition info
209     # @param free_minor minor of unallocated space partition is being created in
210     # @param mb size of partition in MB
211     # @param start Start sector (only used for existing partitions)
212     # @param end End sector (only used for existing partitions)
213     # @param type Partition type (ext2, ext3, fat32, linux-swap, free, extended, etc.)
214     # @param mountpoint='' Partition mountpoint
215     # @param mountopts='' Partition mount options
216 agaffney 635 # @param mkfsopts='' Additional mkfs options
217     def add_partition(self, free_minor, mb, start, end, type, mountpoint='', mountopts='',mkfsopts=''):
218 agaffney 492 new_minor = int(free_minor) + 1
219     if self._partitions.has_key(new_minor):
220 agaffney 107 parts = self._partitions.keys()
221     parts.sort()
222     parts.reverse()
223     hole_at = 0
224     for i in range(1, parts[0]+1):
225 agaffney 492 if i <= new_minor: continue
226     if not self._partitions.has_key(i):
227 agaffney 107 hole_at = i
228     break
229     stopscooting = 0
230     for i in parts:
231     if stopscooting: break
232 agaffney 492 if i >= hole_at and hole_at: continue
233     if i >= new_minor:
234 agaffney 107 self._partitions[i].set_minor(i+1)
235     self._partitions[i+1] = self._partitions[i]
236 agaffney 492 if i == new_minor: stopscooting = 1
237 agaffney 494 if mb != self._partitions[free_minor].get_mb():
238     old_free_mb = self._partitions[free_minor].get_mb()
239     del self._partitions[free_minor]
240 agaffney 497 if archinfo[self._arch]['extended'] and new_minor >= 5:
241 agaffney 639 free_minor = new_minor + FREE_MINOR_FRAC_LOG
242 agaffney 494 else:
243 agaffney 639 free_minor = new_minor + FREE_MINOR_FRAC_PRI
244 agaffney 494 self._partitions[free_minor] = Partition(self, free_minor, old_free_mb-mb, 0, 0, "free")
245     else:
246     del self._partitions[free_minor]
247 agaffney 635 self._partitions[new_minor] = Partition(self, new_minor, mb, start, end, type, mountpoint=mountpoint, mountopts=mountopts,mkfsopts=mkfsopts)
248 agaffney 494 if type == "extended":
249 agaffney 639 self._partitions[4 + FREE_MINOR_FRAC_LOG] = Partition(self, (4 + FREE_MINOR_FRAC_LOG), mb, 0, 0, "free")
250 agaffney 494 self.tidy_partitions()
251 agaffney 107
252 agaffney 509 ##
253 agaffney 513 # Removes partition from partition info
254     # @param minor Minor of partition to remove
255 agaffney 107 def remove_partition(self, minor):
256 agaffney 492 tmppart = self._partitions[int(minor)]
257     free_minor = 0
258     if tmppart.is_logical():
259 agaffney 639 free_minor = int(minor-1)+FREE_MINOR_FRAC_LOG
260 agaffney 492 else:
261 agaffney 639 free_minor = int(minor-1)+FREE_MINOR_FRAC_PRI
262     if free_minor in self._partitions:
263     self._partitions[free_minor].set_mb(self._partitions[free_minor].get_mb() + tmppart.get_mb())
264     else:
265     self._partitions[free_minor] = Partition(self, free_minor, tmppart.get_mb(), 0, 0, "free", format=False, existing=False)
266 agaffney 107 del self._partitions[int(minor)]
267 agaffney 494 self.tidy_partitions()
268 agaffney 107
269 agaffney 509 ##
270 agaffney 923 # This function clears the partition table
271     def clear_partitions(self):
272     # parts = self._partitions.keys()
273     # parts.sort()
274     # parts.reverse()
275     # for part in parts:
276     # if not self._partitions[part].get_type() == "free":
277     # self.remove_partition(part)
278     self._partitions = { (0 + FREE_MINOR_FRAC_PRI): Partition(self, (0 + FREE_MINOR_FRAC_PRI), self.get_total_mb(), 0, 0, "free", format=False, existing=False) }
279    
280     ##
281 agaffney 513 # Returns an ordered list (disk order) of partition minors
282 agaffney 107 def get_ordered_partition_list(self):
283 codeman 625 parts = self._partitions.keys()
284     parts.sort()
285     partlist = []
286 agaffney 492 tmppart = None
287     for part in parts:
288 agaffney 639 if archinfo[self._arch]['extended'] and part > (4 + FREE_MINOR_FRAC_PRI): break
289 agaffney 107 tmppart = self._partitions[part]
290 agaffney 492 partlist.append(part)
291 agaffney 107 if tmppart.is_extended():
292     for part_log in parts:
293 agaffney 639 if part_log < (4 + FREE_MINOR_FRAC_LOG): continue
294 agaffney 492 partlist.append(part_log)
295 agaffney 107 return partlist
296    
297 agaffney 509 ##
298 agaffney 513 # Returns partition info in a format suitable for passing to install_profile.set_partition_tables()
299 agaffney 107 def get_install_profile_structure(self):
300     devdic = {}
301     for part in self._partitions:
302     tmppart = self._partitions[part]
303 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 }
304 agaffney 107 return devdic
305    
306 agaffney 509 ##
307 agaffney 513 # Returns the minor of the extended partition, if any
308 agaffney 183 def get_extended_partition(self):
309     for part in self._partitions:
310     tmppart = self._partitions[part]
311     if tmppart.is_extended():
312     return part
313 agaffney 184 return 0
314 agaffney 183
315 agaffney 509 ##
316 agaffney 624 # Returns the drive model
317     def get_model(self):
318     return self._parted_dev.model
319    
320     ##
321 agaffney 596 # Sets the disklabel type
322     def set_disklabel(self, disklabel):
323     self._disklabel = disklabel
324    
325     ##
326     # Returns the disklabel type
327     def get_disklabel(self):
328     return self._disklabel
329    
330     ##
331 agaffney 513 # Returns the number of sectors on the device
332 agaffney 107 def get_num_sectors(self):
333 agaffney 635 return long(self._total_sectors)
334 agaffney 107
335 agaffney 509 ##
336 agaffney 513 # Returns the size of a cylinder in bytes
337 agaffney 107 def get_cylinder_size(self):
338 agaffney 635 return long(self._cylinder_bytes)
339 agaffney 107
340 agaffney 509 ##
341 agaffney 513 # Returns the size of a sector in bytes
342 agaffney 212 def get_sector_size(self):
343 agaffney 635 return long(self._sector_bytes)
344 agaffney 212
345 agaffney 509 ##
346 agaffney 513 # Returns the number of cylinders
347 agaffney 107 def get_num_cylinders(self):
348 agaffney 635 return long(self._geometry['cylinders'])
349 agaffney 107
350 agaffney 509 ##
351 agaffney 513 # Returns the total number of bytes on the device
352 agaffney 107 def get_drive_bytes(self):
353 agaffney 635 return long(self._total_bytes)
354 agaffney 107
355 agaffney 509 ##
356 agaffney 513 # Returns the total number of MB on the device
357 agaffney 492 def get_total_mb(self):
358     return self._total_mb
359    
360 agaffney 509 ##
361 agaffney 513 # Returns partition info dictionary
362 agaffney 107 def get_partitions(self):
363     return self._partitions
364    
365 agaffney 509 ##
366 agaffney 513 # Prints disk geometry to STDOUT (no longer used)
367 agaffney 107 def print_geometry(self):
368     print self._total_bytes, self._geometry
369    
370 agaffney 513 ##
371     # This class represents a partition within a GLIStorageDevice object
372 agaffney 107 class Partition:
373     "Class representing a single partition within a Device object"
374    
375     _device = None
376 agaffney 492 _minor = 0
377     _orig_minor = 0
378     _start = 0
379     _end = 0
380 agaffney 107 _type = None
381     _mountpoint = None
382     _mountopts = None
383     _format = None
384     _resizeable = None
385 agaffney 523 _min_mb_for_resize = 0
386 agaffney 492 _mb = 0
387 agaffney 631 _mkfsopts = None
388 agaffney 107
389 agaffney 509 ##
390 agaffney 514 # Initialization function for the Partition class
391     # @param device Parent GLIStorageDevice object
392     # @param minor Minor of partition
393     # @param mb Parameter Size of partition in MB
394     # @param start Parameter Start sector of partition
395     # @param end Parameter Start sector of partition
396     # @param type Parameter Type of partition (ext2, ext3, fat32, linux-swap, free, extended, etc.)
397     # @param mountpoint='' Mountpoint of partition
398     # @param mountopts='' Mount options of partition
399 agaffney 635 # @param mkfsopts='' Additional mkfs options
400 agaffney 514 # @param format=True Format partition
401     # @param existing=False This partition exists on disk
402 agaffney 631 def __init__(self, device, minor, mb, start, end, type, mountpoint='', mountopts='', format=True, existing=False, origminor=0, mkfsopts=''):
403 agaffney 107 self._device = device
404 agaffney 492 self._minor = float(minor)
405 agaffney 635 self._start = long(start)
406     self._end = long(end)
407 agaffney 492 self._type = type or "unknown"
408 agaffney 107 self._mountpoint = mountpoint
409     self._mountopts = mountopts
410     self._format = format
411 agaffney 492 self._mb = mb
412 agaffney 596 self._orig_minor = origminor
413 agaffney 631 self._mkfsopts = mkfsopts
414 agaffney 596 if type != "free":
415     if existing and not origminor:
416     self._orig_minor = self._minor
417     self._minor = int(self._minor)
418     self._orig_minor = int(self._orig_minor)
419 agaffney 231 if existing:
420 agaffney 826 try:
421     parted_part = device._parted_disk.get_partition(self._orig_minor)
422     label_type = device._parted_disk.type.name
423     if label_type == "loop":
424     dev_node = device._device
425     else:
426     dev_node = device._device + str(self._orig_minor)
427     # print "dev_node = " + dev_node
428     if type == "ntfs":
429     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 .\+//'"))
430     self._min_mb_for_resize = long(min_bytes / MEGABYTE) + 1
431     self._resizeable = True
432     elif type == "ext2" or type == "ext3":
433     block_size = long(string.strip(commands.getoutput("dumpe2fs -h " + dev_node + r" 2>&1 | grep -e '^Block size:' | sed -e 's/^Block size:\s\+//'")))
434     free_blocks = long(string.strip(commands.getoutput("dumpe2fs -h " + dev_node + r" 2>&1 | grep -e '^Free blocks:' | sed -e 's/^Free blocks:\s\+//'")))
435     free_bytes = long(block_size * free_blocks)
436     # can't hurt to pad (the +50) it a bit since this is really just a guess
437     self._min_mb_for_resize = self._mb - long(free_bytes / MEGABYTE) + 50
438     self._resizeable = True
439     else:
440     parted_part = self._device._parted_disk.get_partition(int(self._orig_minor))
441 agaffney 301 parted_fs = parted_part.geom.file_system_open()
442 agaffney 826 resize_constraint = parted_fs.get_resize_constraint()
443     min_bytes = resize_constraint.min_size * self._device._sector_bytes
444     self._min_mb_for_resize = long(min_bytes / MEGABYTE) + 1
445     self._resizeable = True
446     except:
447     self._resizeable = False
448 agaffney 107
449 agaffney 509 ##
450 agaffney 514 # Returns whether or not the partition is extended
451 agaffney 107 def is_extended(self):
452     if self._type == "extended":
453     return True
454     else:
455     return False
456    
457 agaffney 509 ##
458 agaffney 514 # Returns whether or not the partition is logical
459 agaffney 107 def is_logical(self):
460 agaffney 492 if self._type == "free":
461 agaffney 639 if int(self._minor) + FREE_MINOR_FRAC_LOG == self._minor:
462 agaffney 492 return True
463     else:
464     return False
465 agaffney 497 elif archinfo[self._device._arch]['extended'] and self._minor > 4:
466 agaffney 107 return True
467 agaffney 492 else:
468     return False
469 agaffney 107
470 agaffney 509 ##
471 agaffney 514 # Returns a list of logical partitions if this is an extended partition
472 agaffney 107 def get_logicals(self):
473 agaffney 184 if not self.is_extended():
474     return None
475 agaffney 107 logicals = []
476 agaffney 184 parts = self._device._partitions.keys()
477     parts.sort()
478     for part in parts:
479     if part < 5: continue
480 agaffney 107 logicals.append(part)
481     logicals.sort()
482     return logicals
483    
484 agaffney 509 ##
485 agaffney 514 # Returns the extened parent partition if this is a logical partition (no longer used)
486 agaffney 107 def get_extended_parent(self):
487 agaffney 184 if not self.is_logical():
488     return None
489     else:
490     return self._device.get_partition_at(self._start, ignore_extended=0)
491 agaffney 107
492 agaffney 509 ##
493 agaffney 631 # Sets the options passed to mkfs
494     # @param mkfsopts Options passed to mkfs
495     def set_mkfsopts(self, mkfsopts):
496     self._mkfsopts = mkfsopts
497    
498     ##
499     # Returns the options passes to mkfs
500     def get_mkfsopts(self):
501     return self._mkfsopts
502    
503     ##
504 agaffney 514 # Sets the start sector for the partition
505     # @param start Start sector
506 agaffney 107 def set_start(self, start):
507 agaffney 635 self._start = long(start)
508 agaffney 107
509 agaffney 509 ##
510 agaffney 514 # Returns the start sector for the partition
511 agaffney 107 def get_start(self):
512 agaffney 635 return long(self._start)
513 agaffney 107
514 agaffney 509 ##
515 agaffney 514 # Sets the end sector of the partition
516     # @param end End sector
517 agaffney 107 def set_end(self, end):
518 agaffney 635 self._end = long(end)
519 agaffney 107
520 agaffney 509 ##
521 agaffney 514 # Returns end sector for the partition
522 agaffney 107 def get_end(self):
523 agaffney 635 return long(self._end)
524 agaffney 107
525 agaffney 509 ##
526 agaffney 514 # Returns size of partition in MB
527 agaffney 492 def get_mb(self):
528 agaffney 635 return long(self._mb)
529 agaffney 492
530 agaffney 509 ##
531 agaffney 514 # Sets size of partition in MB
532 agaffney 509 # @param mb Parameter description
533 agaffney 494 def set_mb(self, mb):
534 agaffney 635 self._mb = long(mb)
535 agaffney 494
536 agaffney 509 ##
537 agaffney 514 # Sets type of partition
538 agaffney 509 # @param type Parameter description
539 agaffney 107 def set_type(self, type):
540     self._type = type
541    
542 agaffney 509 ##
543 agaffney 514 # Returns type of partition
544 agaffney 107 def get_type(self):
545     return self._type
546    
547 agaffney 509 ##
548 agaffney 514 # Returns parent GLIStorageDevice object
549 agaffney 107 def get_device(self):
550     return self._device
551    
552 agaffney 509 ##
553 agaffney 514 # Sets minor of partition
554     # @param minor New minor
555 agaffney 107 def set_minor(self, minor):
556 agaffney 492 self._minor = float(minor)
557 agaffney 107
558 agaffney 509 ##
559 agaffney 514 # Returns minor of partition
560 agaffney 107 def get_minor(self):
561 agaffney 492 return float(self._minor)
562 agaffney 107
563 agaffney 509 ##
564 agaffney 514 # Sets the original minor of the partition
565 agaffney 509 # @param orig_minor Parameter description
566 agaffney 386 def set_orig_minor(self, orig_minor):
567     self._orig_minor = int(orig_minor)
568    
569 agaffney 509 ##
570 agaffney 514 # Returns the original minor of the partition
571 agaffney 386 def get_orig_minor(self):
572     return self._orig_minor
573    
574 agaffney 509 ##
575 agaffney 514 # Sets the mountpoint for the partition
576     # @param mountpoint Mountpoint
577 agaffney 107 def set_mountpoint(self, mountpoint):
578     self._mountpoint = mountpoint
579    
580 agaffney 509 ##
581 agaffney 514 # Returns the mountpoint for the partition
582 agaffney 107 def get_mountpoint(self):
583     return self._mountpoint
584    
585 agaffney 509 ##
586 agaffney 514 # Sets the mount options for the partition
587     # @param mountopts Mount options
588 agaffney 107 def set_mountopts(self, mountopts):
589     self._mountopts = mountopts
590    
591 agaffney 509 ##
592 agaffney 514 # Returns the mount options for the partition
593 agaffney 107 def get_mountopts(self):
594     return self._mountopts
595    
596 agaffney 509 ##
597 agaffney 514 # Set whether to format the partition
598 agaffney 523 # @param format Format this partition (True/False)
599 agaffney 107 def set_format(self, format):
600     self._format = format
601    
602 agaffney 509 ##
603 agaffney 514 # Returns whether to format the partition
604 agaffney 107 def get_format(self):
605     return self._format
606    
607 agaffney 509 ##
608 agaffney 523 # Returns whether the partition is resizeable
609     def is_resizeable(self):
610     return self._resizeable
611    
612     ##
613     # Returns minimum MB for resize
614     def get_min_mb_for_resize(self):
615     # if self.is_extended():
616     # min_size = self._start
617     # for part in self._device._partitions:
618     # if part < 5: continue
619     # if part.get_end > min_size: min_size = part.get_end()
620     # return min_size
621     # else:
622     if self._resizeable:
623     return self._min_mb_for_resize
624 agaffney 107 else:
625 agaffney 523 return -1
626 agaffney 107
627 agaffney 509 ##
628 agaffney 523 # Returns maximum MB for resize
629     def get_max_mb_for_resize(self):
630 agaffney 544 if self._resizeable:
631     free_minor = 0
632     if self.is_logical():
633 agaffney 639 free_minor = self._minor + FREE_MINOR_FRAC_LOG
634 agaffney 544 else:
635 agaffney 639 free_minor = self._minor + FREE_MINOR_FRAC_PRI
636 agaffney 544 if free_minor in self._device._partitions:
637     return self._mb + self._device._partitions[free_minor]._mb
638     else:
639     return self._mb
640 agaffney 523 else:
641 agaffney 544 return -1
642 agaffney 107
643 agaffney 509 ##
644 agaffney 544 # Resizes the partition
645     # @param mb New size in MB
646     def resize(self, mb):
647     free_minor = self._minor
648 agaffney 107 if self.is_logical():
649 agaffney 639 free_minor += FREE_MINOR_FRAC_LOG
650 agaffney 544 else:
651 agaffney 639 free_minor += FREE_MINOR_FRAC_PRI
652 agaffney 544 if mb < self._mb:
653     # Shrinking
654     if not free_minor in self._device._partitions:
655     self._device._partitions[free_minor] = Partition(self._device, free_minor, 0, 0, 0, "free", format=False, existing=False)
656     self._device._partitions[free_minor]._mb += self._mb - mb
657     self._mb = mb
658     elif mb == self._mb + self._device._partitions[free_minor]._mb:
659     # Using all available unallocated space
660     del self._device._partitions[free_minor]
661     self._mb = mb
662     elif mb > self._mb:
663     # Growing
664     self._device._partitions[free_minor]._mb = mb - self._mb
665     self._mb = mb
666 agaffney 107
667 agaffney 514 ##
668     # Returns a list of detected partitionable devices
669 agaffney 107 def detect_devices():
670     devices = []
671    
672     # Make sure sysfs exists
673 robbat2 687 # TODO: rewrite for 2.4 support
674 agaffney 107 if not os.path.exists("/sys/bus"):
675 agaffney 556 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "no sysfs found (you MUST use a kernel >2.6)")
676 agaffney 107 # Make sure /proc/partitions exists
677     if not os.path.exists("/proc/partitions"):
678 agaffney 556 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "/proc/partitions does not exist! Please make sure procfs is in your kernel and mounted!")
679 agaffney 107
680     # Load /proc/partitions into the variable 'partitions'
681     partitions = []
682     for line in open("/proc/partitions"):
683 agaffney 556 if len(line.split()) < 4 or not line.split()[0].isdigit() or not line.split()[1].isdigit():
684 agaffney 107 continue
685    
686     # Get the major, minor and device name
687     major = line.split()[0]
688     minor = line.split()[1]
689     device = "/dev/" + line.split()[3]
690    
691     if not major.isdigit() or not minor.isdigit():
692     continue
693    
694     major = int(major)
695     minor = int(minor)
696    
697     # If there is no /dev/'device_name', then scan
698     # all the devices in /dev to try and find a
699     # devices with the same major and minor
700     if not os.path.exists(device):
701     device = None
702     for path, dirs, files in os.walk("/dev"):
703 agaffney 535 for d_file in files:
704     full_file = os.path.join(path, d_file)
705 agaffney 107 if not os.path.exists(full_file):
706     continue
707     statres = os.stat(full_file)
708     fmaj = os.major(statres.st_rdev)
709     fmin = os.minor(statres.st_rdev)
710     if fmaj == major and fmin == minor:
711     device = full_file
712     break
713     if not device:
714     continue
715    
716     partitions.append(( major, minor, device ))
717    
718     # Scan sysfs for the devices of type 'x'
719     # 'x' being a member of the list below:
720 robbat2 687 # TODO: rewrite for 2.4 support
721 agaffney 107 for dev_type in [ "ide", "scsi" ]: # Other device types? usb? fw?
722     if os.path.exists("/sys/bus/" + dev_type):
723     sysfs_devices = os.listdir("/sys/bus/"+dev_type+"/devices")
724    
725     # For each device in the devices on that bus
726     for sysfs_device in sysfs_devices:
727 agaffney 556 dev_file = "/sys/bus/" + dev_type + "/devices/" + sysfs_device + "/block/dev"
728 agaffney 107
729     # If the file is not a block device, loop
730     if not os.path.exists(dev_file):
731     continue
732    
733     # Get the major and minor info
734     try:
735     major, minor = open(dev_file).read().split(":")
736     major = int(major)
737     minor = int(minor)
738     except:
739 agaffney 556 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "invalid major minor in " + dev_file)
740 agaffney 107
741     # Find a device listed in /proc/partitions
742     # that has the same minor and major as our
743     # current block device.
744     for record in partitions:
745     if major == record[0] and minor == record[1]:
746     devices.append(record[2])
747 agaffney 595
748     # For testing the partitioning code
749     if GLIUtility.is_file("/tmp/disk.img"):
750     devices.append("/tmp/disk.img")
751    
752 agaffney 107 # We have assembled the list of devices, so return it
753     return devices

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