/[gli]/trunk/src/GLIStorageDevice.py
Gentoo

Contents of /trunk/src/GLIStorageDevice.py

Parent Directory Parent Directory | Revision Log Revision Log


Revision 1037 - (hide annotations) (download) (as text)
Sun Nov 6 17:58:31 2005 UTC (14 years, 11 months ago) by agaffney
File MIME type: text/x-python
File size: 26694 byte(s)
  src/GLIStorageDevice.py:
  initial generic disk support

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

Properties

Name Value
svn:eol-style native

  ViewVC Help
Powered by ViewVC 1.1.20