/[gli]/trunk/src/GLIStorageDevice.py
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Tue Nov 8 01:50:08 2005 UTC (14 years, 11 months ago) by agaffney
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'Recommended layout' and 'Clear drive' functions

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 1037 def __init__(self, device, arch="x86", set_geometry=True, virtual=False, local_device=True):
48 agaffney 107 self._device = device
49     self._partitions = {}
50     self._geometry = {'cylinders': 0, 'heads': 0, 'sectors': 0, 'sectorsize': 512}
51     self._total_bytes = 0
52     self._cylinder_bytes = 0
53 agaffney 492 self._arch = arch
54 agaffney 1037 self._local_device = local_device
55     if self._local_device:
56     self._parted_dev = parted.PedDevice.get(self._device)
57     try:
58     self._parted_disk = parted.PedDisk.new(self._parted_dev)
59     except:
60     self._parted_disk = self._parted_dev.disk_new_fresh(parted.disk_type_get(archinfo[self._arch]['disklabel']))
61 agaffney 1038 self._disklabel = self._parted_disk.type.name
62     else:
63     self._disklabel = archinfo[self._arch]['disklabel']
64 agaffney 596 if set_geometry:
65     self.set_disk_geometry_from_disk()
66 agaffney 107
67 agaffney 509 ##
68 agaffney 513 # Sets disk geometry info from disk. This function is used internally by __init__()
69 agaffney 107 def set_disk_geometry_from_disk(self):
70     self._total_bytes = self._parted_dev.length * self._parted_dev.sector_size
71 agaffney 205 self._geometry['heads'], self._geometry['sectors'], self._geometry['cylinders'] = self._parted_dev.heads, self._parted_dev.sectors, self._parted_dev.cylinders
72 agaffney 212 self._sector_bytes = self._parted_dev.sector_size
73     self._cylinder_bytes = self._geometry['heads'] * self._geometry['sectors'] * self._sector_bytes
74     self._total_sectors = self._parted_dev.length
75 agaffney 107 self._sectors_in_cylinder = self._geometry['heads'] * self._geometry['sectors']
76 agaffney 635 self._total_mb = long(self._total_bytes / MEGABYTE)
77 agaffney 107
78 agaffney 509 ##
79 agaffney 513 # Sets partition info from disk.
80 agaffney 107 def set_partitions_from_disk(self):
81 agaffney 492 last_part = 0
82     last_log_part = 4
83 agaffney 107 parted_part = self._parted_disk.next_partition()
84 agaffney 492 while parted_part:
85 agaffney 635 part_mb = long((parted_part.geom.end - parted_part.geom.start + 1) * self._sector_bytes / MEGABYTE)
86 agaffney 492 if parted_part.num >= 1:
87 agaffney 113 fs_type = ""
88     if parted_part.fs_type != None: fs_type = parted_part.fs_type.name
89     if parted_part.type == 2: fs_type = "extended"
90 agaffney 501 if archinfo[self._arch]['extended'] and parted_part.num > 4:
91     last_log_part = parted_part.num
92     else:
93     last_part = parted_part.num
94 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)
95     elif parted_part.type_name == "free":
96 agaffney 640 # parent_part = self.get_partition_at(parted_part.geom.start, ignore_extended=0)
97     # if parent_part:
98 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():
99 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)
100 agaffney 492 last_log_part += 1
101     else:
102 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)
103 agaffney 492 last_part += 1
104     parted_part = self._parted_disk.next_partition(parted_part)
105 agaffney 107
106 agaffney 509 ##
107 agaffney 639 # Imports partition info from the install profile partition structure
108 agaffney 513 # @param ips Parameter structure returned from install_profile.get_partition_tables()
109 agaffney 492 def set_partitions_from_install_profile_structure(self, ips):
110 agaffney 596 for part in ips:
111     tmppart = ips[part]
112     existing = False
113     if tmppart['origminor'] and not tmppart['format']:
114     existing = True
115 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'])
116 agaffney 492
117 agaffney 509 ##
118 agaffney 513 # Returns name of device (e.g. /dev/hda) being represented
119 agaffney 107 def get_device(self):
120     return self._device
121    
122 agaffney 509 ##
123 agaffney 912 # Uses magic to apply the recommended partition layout
124     def do_recommended(self):
125     free_minor = 0
126 agaffney 924 recommended_parts = [ { 'type': "ext2", 'size': 100, 'mountpoint': "/boot" },
127     { 'type': "linux-swap", 'size': 512, 'mountpoint': "" },
128 agaffney 916 { 'type': "ext3", 'size': "*", 'mountpoint': "/" } ]
129     to_create = []
130 agaffney 925 physical_memory = int(GLIUtility.spawn(r"free -m | egrep '^Mem:' | sed -e 's/^Mem: \+//' -e 's/ \+.\+$//'", return_output=True)[1].strip())
131 agaffney 916 parts = self.get_ordered_partition_list()
132 agaffney 912 for part in parts:
133     if self._partitions[part].get_type() == "free" and self._partitions[part].get_mb() >= 4096:
134     free_minor = part
135 agaffney 916 break
136 agaffney 912 if not free_minor:
137     raise GLIException("RecommendedPartitionLayoutError", "notice", "do_recommended", "You do not have atleast 4GB of concurrent unallocated space. Please remove some partitions and try again.")
138 agaffney 916 remaining_free = self._partitions[free_minor].get_mb()
139     for newpart in recommended_parts:
140 agaffney 923 if archinfo[self._arch]['extended'] and free_minor == (3 + FREE_MINOR_FRAC_PRI) and not newpart == recommended_parts[-1]:
141 agaffney 916 if self.get_extended_partition():
142     raise GLIException("RecommendedPartitionLayoutError", "notice", "do_recommended", "This code is not yet robust enough to handle automatic partitioning with your current layout.")
143     to_create.append({ 'type': "extended", 'size': remaining_free, 'mountpoint': "", 'free_minor': free_minor })
144     free_minor = 4 + FREE_MINOR_FRAC_LOG
145     newpart['free_minor'] = free_minor
146 agaffney 926 if newpart['type'] == "linux-swap" and physical_memory and physical_memory < 1024:
147 agaffney 925 newpart['size'] = physical_memory * 2
148 agaffney 916 to_create.append(newpart)
149     free_minor = free_minor + 1
150     if not newpart['size'] == "*":
151     remaining_free = remaining_free - newpart['size']
152     for newpart in to_create:
153     if newpart['size'] == "*":
154     newpart['size'] = self._partitions[newpart['free_minor']].get_mb()
155     self.add_partition(newpart['free_minor'], newpart['size'], 0, 0, newpart['type'], mountpoint=newpart['mountpoint'])
156 agaffney 912
157     ##
158 agaffney 513 # Combines free space and closes gaps in minor numbers. This is used internally
159 agaffney 494 def tidy_partitions(self):
160     last_minor = 0
161     last_log_minor = 4
162     last_free = 0
163     last_log_free = 0
164     parts = self._partitions.keys()
165     parts.sort()
166     for part in parts:
167 agaffney 497 if archinfo[self._arch]['extended'] and part > 4: break
168 agaffney 494 tmppart = self._partitions[part]
169     if tmppart.get_type() == "extended":
170     for part_log in parts:
171 agaffney 639 if part_log < (4 + FREE_MINOR_FRAC_LOG): continue
172 agaffney 494 tmppart_log = self._partitions[part_log]
173     if tmppart_log.get_type() == "free":
174 agaffney 495 if last_log_minor < last_log_free:
175     self._partitions[last_log_free].set_mb(self._partitions[last_log_free].get_mb()+tmppart_log.get_mb())
176     del self._partitions[part_log]
177 agaffney 494 else:
178 agaffney 495 if not last_log_free:
179 agaffney 639 last_log_free = last_log_minor + FREE_MINOR_FRAC_LOG
180 agaffney 544 else:
181 agaffney 627 last_log_free = part_log
182 agaffney 495 tmppart_log.set_minor(last_log_free)
183     self._partitions[last_log_free] = tmppart_log
184     if part_log != last_log_free: del self._partitions[part_log]
185 agaffney 494 else:
186     if part_log > (last_log_minor + 1):
187     tmppart_log.set_minor(last_log_minor + 1)
188 agaffney 495 last_log_minor = last_log_minor + 1
189     self._partitions[last_log_minor] = tmppart_log
190     del self._partitions[part_log]
191 agaffney 544 else:
192     last_log_minor = part_log
193 agaffney 627 elif tmppart.get_type() == "free":
194 agaffney 495 if last_minor < last_free:
195     self._partitions[last_free].set_mb(self._partitions[last_free].get_mb()+tmppart.get_mb())
196     del self._partitions[part]
197 agaffney 494 else:
198 agaffney 495 if not last_free:
199 agaffney 639 last_free = last_minor + FREE_MINOR_FRAC_PRI
200 agaffney 544 else:
201     last_free = part
202 agaffney 495 tmppart.set_minor(last_free)
203     self._partitions[last_free] = tmppart
204     if part != last_free: del self._partitions[part]
205 agaffney 494 else:
206     if part > (last_minor + 1):
207     tmppart.set_minor(last_minor + 1)
208 agaffney 495 last_minor = last_minor + 1
209     self._partitions[last_minor] = tmppart
210     del self._partitions[part]
211 agaffney 544 else:
212     last_minor = part
213 agaffney 494
214 agaffney 509 ##
215 agaffney 513 # Adds a new partition to the partition info
216     # @param free_minor minor of unallocated space partition is being created in
217     # @param mb size of partition in MB
218     # @param start Start sector (only used for existing partitions)
219     # @param end End sector (only used for existing partitions)
220     # @param type Partition type (ext2, ext3, fat32, linux-swap, free, extended, etc.)
221     # @param mountpoint='' Partition mountpoint
222     # @param mountopts='' Partition mount options
223 agaffney 635 # @param mkfsopts='' Additional mkfs options
224     def add_partition(self, free_minor, mb, start, end, type, mountpoint='', mountopts='',mkfsopts=''):
225 agaffney 1037 if free_minor == -1:
226     tmpparts = self._partitions.keys()
227     tmpparts.sort()
228 agaffney 1040 tmpminor = 0
229     if len(tmpparts):
230     tmpminor = tmpparts[-1]
231 agaffney 1037 if archinfo[self._arch]['extended'] and tmpminor >= 5:
232 agaffney 1040 free_minor = tmpminor + FREE_MINOR_FRAC_LOG
233 agaffney 1037 else:
234 agaffney 1040 free_minor = tmpminor + FREE_MINOR_FRAC_PRI
235 agaffney 1037 self._partitions[free_minor] = Partition(self, free_minor, mb, 0, 0, "free")
236 agaffney 492 new_minor = int(free_minor) + 1
237     if self._partitions.has_key(new_minor):
238 agaffney 107 parts = self._partitions.keys()
239     parts.sort()
240     parts.reverse()
241     hole_at = 0
242     for i in range(1, parts[0]+1):
243 agaffney 492 if i <= new_minor: continue
244     if not self._partitions.has_key(i):
245 agaffney 107 hole_at = i
246     break
247     stopscooting = 0
248     for i in parts:
249     if stopscooting: break
250 agaffney 492 if i >= hole_at and hole_at: continue
251     if i >= new_minor:
252 agaffney 107 self._partitions[i].set_minor(i+1)
253     self._partitions[i+1] = self._partitions[i]
254 agaffney 492 if i == new_minor: stopscooting = 1
255 agaffney 494 if mb != self._partitions[free_minor].get_mb():
256     old_free_mb = self._partitions[free_minor].get_mb()
257     del self._partitions[free_minor]
258 agaffney 497 if archinfo[self._arch]['extended'] and new_minor >= 5:
259 agaffney 639 free_minor = new_minor + FREE_MINOR_FRAC_LOG
260 agaffney 494 else:
261 agaffney 639 free_minor = new_minor + FREE_MINOR_FRAC_PRI
262 agaffney 494 self._partitions[free_minor] = Partition(self, free_minor, old_free_mb-mb, 0, 0, "free")
263     else:
264     del self._partitions[free_minor]
265 agaffney 635 self._partitions[new_minor] = Partition(self, new_minor, mb, start, end, type, mountpoint=mountpoint, mountopts=mountopts,mkfsopts=mkfsopts)
266 agaffney 494 if type == "extended":
267 agaffney 639 self._partitions[4 + FREE_MINOR_FRAC_LOG] = Partition(self, (4 + FREE_MINOR_FRAC_LOG), mb, 0, 0, "free")
268 agaffney 494 self.tidy_partitions()
269 agaffney 1040 return new_minor
270 agaffney 107
271 agaffney 509 ##
272 agaffney 513 # Removes partition from partition info
273     # @param minor Minor of partition to remove
274 agaffney 107 def remove_partition(self, minor):
275 agaffney 492 tmppart = self._partitions[int(minor)]
276     free_minor = 0
277     if tmppart.is_logical():
278 agaffney 639 free_minor = int(minor-1)+FREE_MINOR_FRAC_LOG
279 agaffney 492 else:
280 agaffney 639 free_minor = int(minor-1)+FREE_MINOR_FRAC_PRI
281     if free_minor in self._partitions:
282     self._partitions[free_minor].set_mb(self._partitions[free_minor].get_mb() + tmppart.get_mb())
283     else:
284     self._partitions[free_minor] = Partition(self, free_minor, tmppart.get_mb(), 0, 0, "free", format=False, existing=False)
285 agaffney 107 del self._partitions[int(minor)]
286 agaffney 494 self.tidy_partitions()
287 agaffney 107
288 agaffney 509 ##
289 agaffney 923 # This function clears the partition table
290     def clear_partitions(self):
291     # parts = self._partitions.keys()
292     # parts.sort()
293     # parts.reverse()
294     # for part in parts:
295     # if not self._partitions[part].get_type() == "free":
296     # self.remove_partition(part)
297     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) }
298    
299     ##
300 agaffney 513 # Returns an ordered list (disk order) of partition minors
301 agaffney 107 def get_ordered_partition_list(self):
302 codeman 625 parts = self._partitions.keys()
303     parts.sort()
304     partlist = []
305 agaffney 492 tmppart = None
306     for part in parts:
307 agaffney 639 if archinfo[self._arch]['extended'] and part > (4 + FREE_MINOR_FRAC_PRI): break
308 agaffney 107 tmppart = self._partitions[part]
309 agaffney 492 partlist.append(part)
310 agaffney 107 if tmppart.is_extended():
311     for part_log in parts:
312 agaffney 639 if part_log < (4 + FREE_MINOR_FRAC_LOG): continue
313 agaffney 492 partlist.append(part_log)
314 agaffney 107 return partlist
315    
316 agaffney 509 ##
317 agaffney 513 # Returns partition info in a format suitable for passing to install_profile.set_partition_tables()
318 agaffney 107 def get_install_profile_structure(self):
319     devdic = {}
320     for part in self._partitions:
321     tmppart = self._partitions[part]
322 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 }
323 agaffney 107 return devdic
324    
325 agaffney 509 ##
326 agaffney 513 # Returns the minor of the extended partition, if any
327 agaffney 183 def get_extended_partition(self):
328     for part in self._partitions:
329     tmppart = self._partitions[part]
330     if tmppart.is_extended():
331     return part
332 agaffney 184 return 0
333 agaffney 183
334 agaffney 509 ##
335 agaffney 624 # Returns the drive model
336     def get_model(self):
337 agaffney 1038 if self._local_device:
338     return self._parted_dev.model
339     else:
340     return "Generic disk"
341 agaffney 624
342     ##
343 agaffney 596 # Sets the disklabel type
344     def set_disklabel(self, disklabel):
345     self._disklabel = disklabel
346    
347     ##
348     # Returns the disklabel type
349     def get_disklabel(self):
350     return self._disklabel
351    
352     ##
353 agaffney 513 # Returns the number of sectors on the device
354 agaffney 107 def get_num_sectors(self):
355 agaffney 635 return long(self._total_sectors)
356 agaffney 107
357 agaffney 509 ##
358 agaffney 513 # Returns the size of a cylinder in bytes
359 agaffney 107 def get_cylinder_size(self):
360 agaffney 635 return long(self._cylinder_bytes)
361 agaffney 107
362 agaffney 509 ##
363 agaffney 513 # Returns the size of a sector in bytes
364 agaffney 212 def get_sector_size(self):
365 agaffney 635 return long(self._sector_bytes)
366 agaffney 212
367 agaffney 509 ##
368 agaffney 513 # Returns the number of cylinders
369 agaffney 107 def get_num_cylinders(self):
370 agaffney 635 return long(self._geometry['cylinders'])
371 agaffney 107
372 agaffney 509 ##
373 agaffney 513 # Returns the total number of bytes on the device
374 agaffney 107 def get_drive_bytes(self):
375 agaffney 635 return long(self._total_bytes)
376 agaffney 107
377 agaffney 509 ##
378 agaffney 513 # Returns the total number of MB on the device
379 agaffney 492 def get_total_mb(self):
380 agaffney 1037 if self._local_device:
381     return self._total_mb
382     else:
383     total_mb = 0
384     for tmppart in self._partitions:
385 agaffney 1046 total_mb += self._partitions[tmppart].get_mb()
386 agaffney 1037 return total_mb
387 agaffney 492
388 agaffney 509 ##
389 agaffney 513 # Returns partition info dictionary
390 agaffney 107 def get_partitions(self):
391     return self._partitions
392    
393 agaffney 509 ##
394 agaffney 513 # Prints disk geometry to STDOUT (no longer used)
395 agaffney 107 def print_geometry(self):
396     print self._total_bytes, self._geometry
397    
398 agaffney 513 ##
399     # This class represents a partition within a GLIStorageDevice object
400 agaffney 107 class Partition:
401     "Class representing a single partition within a Device object"
402    
403     _device = None
404 agaffney 492 _minor = 0
405     _orig_minor = 0
406     _start = 0
407     _end = 0
408 agaffney 107 _type = None
409     _mountpoint = None
410     _mountopts = None
411     _format = None
412     _resizeable = None
413 agaffney 523 _min_mb_for_resize = 0
414 agaffney 492 _mb = 0
415 agaffney 631 _mkfsopts = None
416 agaffney 107
417 agaffney 509 ##
418 agaffney 514 # Initialization function for the Partition class
419     # @param device Parent GLIStorageDevice object
420     # @param minor Minor of partition
421     # @param mb Parameter Size of partition in MB
422     # @param start Parameter Start sector of partition
423     # @param end Parameter Start sector of partition
424     # @param type Parameter Type of partition (ext2, ext3, fat32, linux-swap, free, extended, etc.)
425     # @param mountpoint='' Mountpoint of partition
426     # @param mountopts='' Mount options of partition
427 agaffney 635 # @param mkfsopts='' Additional mkfs options
428 agaffney 514 # @param format=True Format partition
429     # @param existing=False This partition exists on disk
430 agaffney 631 def __init__(self, device, minor, mb, start, end, type, mountpoint='', mountopts='', format=True, existing=False, origminor=0, mkfsopts=''):
431 agaffney 107 self._device = device
432 agaffney 492 self._minor = float(minor)
433 agaffney 635 self._start = long(start)
434     self._end = long(end)
435 agaffney 492 self._type = type or "unknown"
436 agaffney 107 self._mountpoint = mountpoint
437     self._mountopts = mountopts
438     self._format = format
439 agaffney 492 self._mb = mb
440 agaffney 596 self._orig_minor = origminor
441 agaffney 631 self._mkfsopts = mkfsopts
442 agaffney 596 if type != "free":
443     if existing and not origminor:
444     self._orig_minor = self._minor
445     self._minor = int(self._minor)
446     self._orig_minor = int(self._orig_minor)
447 agaffney 231 if existing:
448 agaffney 826 try:
449     parted_part = device._parted_disk.get_partition(self._orig_minor)
450     label_type = device._parted_disk.type.name
451     if label_type == "loop":
452     dev_node = device._device
453     else:
454     dev_node = device._device + str(self._orig_minor)
455     # print "dev_node = " + dev_node
456     if type == "ntfs":
457     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 .\+//'"))
458     self._min_mb_for_resize = long(min_bytes / MEGABYTE) + 1
459     self._resizeable = True
460     elif type == "ext2" or type == "ext3":
461     block_size = long(string.strip(commands.getoutput("dumpe2fs -h " + dev_node + r" 2>&1 | grep -e '^Block size:' | sed -e 's/^Block size:\s\+//'")))
462     free_blocks = long(string.strip(commands.getoutput("dumpe2fs -h " + dev_node + r" 2>&1 | grep -e '^Free blocks:' | sed -e 's/^Free blocks:\s\+//'")))
463     free_bytes = long(block_size * free_blocks)
464     # can't hurt to pad (the +50) it a bit since this is really just a guess
465     self._min_mb_for_resize = self._mb - long(free_bytes / MEGABYTE) + 50
466     self._resizeable = True
467     else:
468     parted_part = self._device._parted_disk.get_partition(int(self._orig_minor))
469 agaffney 301 parted_fs = parted_part.geom.file_system_open()
470 agaffney 826 resize_constraint = parted_fs.get_resize_constraint()
471     min_bytes = resize_constraint.min_size * self._device._sector_bytes
472     self._min_mb_for_resize = long(min_bytes / MEGABYTE) + 1
473     self._resizeable = True
474     except:
475     self._resizeable = False
476 agaffney 107
477 agaffney 509 ##
478 agaffney 514 # Returns whether or not the partition is extended
479 agaffney 107 def is_extended(self):
480     if self._type == "extended":
481     return True
482     else:
483     return False
484    
485 agaffney 509 ##
486 agaffney 514 # Returns whether or not the partition is logical
487 agaffney 107 def is_logical(self):
488 agaffney 492 if self._type == "free":
489 agaffney 639 if int(self._minor) + FREE_MINOR_FRAC_LOG == self._minor:
490 agaffney 492 return True
491     else:
492     return False
493 agaffney 497 elif archinfo[self._device._arch]['extended'] and self._minor > 4:
494 agaffney 107 return True
495 agaffney 492 else:
496     return False
497 agaffney 107
498 agaffney 509 ##
499 agaffney 514 # Returns a list of logical partitions if this is an extended partition
500 agaffney 107 def get_logicals(self):
501 agaffney 184 if not self.is_extended():
502     return None
503 agaffney 107 logicals = []
504 agaffney 184 parts = self._device._partitions.keys()
505     parts.sort()
506     for part in parts:
507     if part < 5: continue
508 agaffney 107 logicals.append(part)
509     logicals.sort()
510     return logicals
511    
512 agaffney 509 ##
513 agaffney 514 # Returns the extened parent partition if this is a logical partition (no longer used)
514 agaffney 107 def get_extended_parent(self):
515 agaffney 184 if not self.is_logical():
516     return None
517     else:
518     return self._device.get_partition_at(self._start, ignore_extended=0)
519 agaffney 107
520 agaffney 509 ##
521 agaffney 631 # Sets the options passed to mkfs
522     # @param mkfsopts Options passed to mkfs
523     def set_mkfsopts(self, mkfsopts):
524     self._mkfsopts = mkfsopts
525    
526     ##
527     # Returns the options passes to mkfs
528     def get_mkfsopts(self):
529     return self._mkfsopts
530    
531     ##
532 agaffney 514 # Sets the start sector for the partition
533     # @param start Start sector
534 agaffney 107 def set_start(self, start):
535 agaffney 635 self._start = long(start)
536 agaffney 107
537 agaffney 509 ##
538 agaffney 514 # Returns the start sector for the partition
539 agaffney 107 def get_start(self):
540 agaffney 635 return long(self._start)
541 agaffney 107
542 agaffney 509 ##
543 agaffney 514 # Sets the end sector of the partition
544     # @param end End sector
545 agaffney 107 def set_end(self, end):
546 agaffney 635 self._end = long(end)
547 agaffney 107
548 agaffney 509 ##
549 agaffney 514 # Returns end sector for the partition
550 agaffney 107 def get_end(self):
551 agaffney 635 return long(self._end)
552 agaffney 107
553 agaffney 509 ##
554 agaffney 514 # Returns size of partition in MB
555 agaffney 492 def get_mb(self):
556 agaffney 635 return long(self._mb)
557 agaffney 492
558 agaffney 509 ##
559 agaffney 514 # Sets size of partition in MB
560 agaffney 509 # @param mb Parameter description
561 agaffney 494 def set_mb(self, mb):
562 agaffney 635 self._mb = long(mb)
563 agaffney 494
564 agaffney 509 ##
565 agaffney 514 # Sets type of partition
566 agaffney 509 # @param type Parameter description
567 agaffney 107 def set_type(self, type):
568     self._type = type
569    
570 agaffney 509 ##
571 agaffney 514 # Returns type of partition
572 agaffney 107 def get_type(self):
573     return self._type
574    
575 agaffney 509 ##
576 agaffney 514 # Returns parent GLIStorageDevice object
577 agaffney 107 def get_device(self):
578     return self._device
579    
580 agaffney 509 ##
581 agaffney 514 # Sets minor of partition
582     # @param minor New minor
583 agaffney 107 def set_minor(self, minor):
584 agaffney 492 self._minor = float(minor)
585 agaffney 107
586 agaffney 509 ##
587 agaffney 514 # Returns minor of partition
588 agaffney 107 def get_minor(self):
589 agaffney 492 return float(self._minor)
590 agaffney 107
591 agaffney 509 ##
592 agaffney 514 # Sets the original minor of the partition
593 agaffney 509 # @param orig_minor Parameter description
594 agaffney 386 def set_orig_minor(self, orig_minor):
595     self._orig_minor = int(orig_minor)
596    
597 agaffney 509 ##
598 agaffney 514 # Returns the original minor of the partition
599 agaffney 386 def get_orig_minor(self):
600     return self._orig_minor
601    
602 agaffney 509 ##
603 agaffney 514 # Sets the mountpoint for the partition
604     # @param mountpoint Mountpoint
605 agaffney 107 def set_mountpoint(self, mountpoint):
606     self._mountpoint = mountpoint
607    
608 agaffney 509 ##
609 agaffney 514 # Returns the mountpoint for the partition
610 agaffney 107 def get_mountpoint(self):
611     return self._mountpoint
612    
613 agaffney 509 ##
614 agaffney 514 # Sets the mount options for the partition
615     # @param mountopts Mount options
616 agaffney 107 def set_mountopts(self, mountopts):
617     self._mountopts = mountopts
618    
619 agaffney 509 ##
620 agaffney 514 # Returns the mount options for the partition
621 agaffney 107 def get_mountopts(self):
622     return self._mountopts
623    
624 agaffney 509 ##
625 agaffney 514 # Set whether to format the partition
626 agaffney 523 # @param format Format this partition (True/False)
627 agaffney 107 def set_format(self, format):
628     self._format = format
629    
630 agaffney 509 ##
631 agaffney 514 # Returns whether to format the partition
632 agaffney 107 def get_format(self):
633     return self._format
634    
635 agaffney 509 ##
636 agaffney 523 # Returns whether the partition is resizeable
637     def is_resizeable(self):
638     return self._resizeable
639    
640     ##
641     # Returns minimum MB for resize
642     def get_min_mb_for_resize(self):
643     # if self.is_extended():
644     # min_size = self._start
645     # for part in self._device._partitions:
646     # if part < 5: continue
647     # if part.get_end > min_size: min_size = part.get_end()
648     # return min_size
649     # else:
650     if self._resizeable:
651     return self._min_mb_for_resize
652 agaffney 107 else:
653 agaffney 523 return -1
654 agaffney 107
655 agaffney 509 ##
656 agaffney 523 # Returns maximum MB for resize
657     def get_max_mb_for_resize(self):
658 agaffney 544 if self._resizeable:
659     free_minor = 0
660     if self.is_logical():
661 agaffney 639 free_minor = self._minor + FREE_MINOR_FRAC_LOG
662 agaffney 544 else:
663 agaffney 639 free_minor = self._minor + FREE_MINOR_FRAC_PRI
664 agaffney 544 if free_minor in self._device._partitions:
665     return self._mb + self._device._partitions[free_minor]._mb
666     else:
667     return self._mb
668 agaffney 523 else:
669 agaffney 544 return -1
670 agaffney 107
671 agaffney 509 ##
672 agaffney 544 # Resizes the partition
673     # @param mb New size in MB
674     def resize(self, mb):
675     free_minor = self._minor
676 agaffney 107 if self.is_logical():
677 agaffney 639 free_minor += FREE_MINOR_FRAC_LOG
678 agaffney 544 else:
679 agaffney 639 free_minor += FREE_MINOR_FRAC_PRI
680 agaffney 544 if mb < self._mb:
681     # Shrinking
682     if not free_minor in self._device._partitions:
683     self._device._partitions[free_minor] = Partition(self._device, free_minor, 0, 0, 0, "free", format=False, existing=False)
684     self._device._partitions[free_minor]._mb += self._mb - mb
685     self._mb = mb
686     elif mb == self._mb + self._device._partitions[free_minor]._mb:
687     # Using all available unallocated space
688     del self._device._partitions[free_minor]
689     self._mb = mb
690     elif mb > self._mb:
691     # Growing
692     self._device._partitions[free_minor]._mb = mb - self._mb
693     self._mb = mb
694 agaffney 107
695 agaffney 514 ##
696     # Returns a list of detected partitionable devices
697 agaffney 107 def detect_devices():
698     devices = []
699    
700     # Make sure sysfs exists
701 robbat2 687 # TODO: rewrite for 2.4 support
702 agaffney 107 if not os.path.exists("/sys/bus"):
703 agaffney 556 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "no sysfs found (you MUST use a kernel >2.6)")
704 agaffney 107 # Make sure /proc/partitions exists
705     if not os.path.exists("/proc/partitions"):
706 agaffney 556 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "/proc/partitions does not exist! Please make sure procfs is in your kernel and mounted!")
707 agaffney 107
708     # Load /proc/partitions into the variable 'partitions'
709     partitions = []
710     for line in open("/proc/partitions"):
711 agaffney 556 if len(line.split()) < 4 or not line.split()[0].isdigit() or not line.split()[1].isdigit():
712 agaffney 107 continue
713    
714     # Get the major, minor and device name
715     major = line.split()[0]
716     minor = line.split()[1]
717     device = "/dev/" + line.split()[3]
718    
719     if not major.isdigit() or not minor.isdigit():
720     continue
721    
722     major = int(major)
723     minor = int(minor)
724    
725     # If there is no /dev/'device_name', then scan
726     # all the devices in /dev to try and find a
727     # devices with the same major and minor
728     if not os.path.exists(device):
729     device = None
730     for path, dirs, files in os.walk("/dev"):
731 agaffney 535 for d_file in files:
732     full_file = os.path.join(path, d_file)
733 agaffney 107 if not os.path.exists(full_file):
734     continue
735     statres = os.stat(full_file)
736     fmaj = os.major(statres.st_rdev)
737     fmin = os.minor(statres.st_rdev)
738     if fmaj == major and fmin == minor:
739     device = full_file
740     break
741     if not device:
742     continue
743    
744     partitions.append(( major, minor, device ))
745    
746     # Scan sysfs for the devices of type 'x'
747     # 'x' being a member of the list below:
748 robbat2 687 # TODO: rewrite for 2.4 support
749 agaffney 107 for dev_type in [ "ide", "scsi" ]: # Other device types? usb? fw?
750     if os.path.exists("/sys/bus/" + dev_type):
751     sysfs_devices = os.listdir("/sys/bus/"+dev_type+"/devices")
752    
753     # For each device in the devices on that bus
754     for sysfs_device in sysfs_devices:
755 agaffney 556 dev_file = "/sys/bus/" + dev_type + "/devices/" + sysfs_device + "/block/dev"
756 agaffney 107
757     # If the file is not a block device, loop
758     if not os.path.exists(dev_file):
759     continue
760    
761     # Get the major and minor info
762     try:
763     major, minor = open(dev_file).read().split(":")
764     major = int(major)
765     minor = int(minor)
766     except:
767 agaffney 556 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "invalid major minor in " + dev_file)
768 agaffney 107
769     # Find a device listed in /proc/partitions
770     # that has the same minor and major as our
771     # current block device.
772     for record in partitions:
773     if major == record[0] and minor == record[1]:
774     devices.append(record[2])
775 agaffney 595
776     # For testing the partitioning code
777     if GLIUtility.is_file("/tmp/disk.img"):
778     devices.append("/tmp/disk.img")
779    
780 agaffney 107 # We have assembled the list of devices, so return it
781     return devices

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