/[gli]/trunk/src/GLIStorageDevice.py
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Sat May 7 05:00:15 2005 UTC (15 years, 5 months ago) by agaffney
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GLIStorageDevice cleanup patch from bug #91761

1 agaffney 535 import commands, string, os, parted
2 agaffney 556 from GLIException import *
3 agaffney 107
4 agaffney 492 MEGABYTE = 1024 * 1024
5    
6 agaffney 497 archinfo = { 'sparc': { 'fixedparts': [ { 'minor': 3, 'type': "wholedisk" } ], 'disklabel': 'sun', 'extended': False },
7     'hppa': { 'fixedparts': [ { 'minor': 1, 'type': "boot" } ], 'disklabel': 'msdos', 'extended': False },
8     'x86': { 'fixedparts': [], 'disklabel': 'msdos', 'extended': True },
9     'ppc': { 'fixedparts': [ { 'minor': 1, 'type': "metadata" } ], 'disklabel': 'mac', 'extended': False }
10     }
11    
12 agaffney 513 ##
13     # This class provides a partitioning abstraction for the frontends
14 agaffney 107 class Device:
15     "Class representing a partitionable device."
16    
17     _device = None
18     _partitions = None
19     _geometry = None
20     _total_bytes = 0
21     _total_sectors = 0
22     _cylinder_bytes = 0
23     _sectors_in_cylinder = 0
24     _parted_dev = None
25     _parted_disk = None
26 agaffney 212 _sector_bytes = 0
27 agaffney 492 _total_mb = 0
28     _arch = None
29    
30 agaffney 509 ##
31 agaffney 513 # Initialization function for GLIStorageDevice class
32     # @param device Device node (e.g. /dev/hda) of device being represented
33     # @param arch="x86" Architecture that we're partition for (defaults to 'x86' for now)
34 agaffney 492 def __init__(self, device, arch="x86"):
35 agaffney 107 self._device = device
36     self._partitions = {}
37     self._geometry = {'cylinders': 0, 'heads': 0, 'sectors': 0, 'sectorsize': 512}
38     self._total_bytes = 0
39     self._cylinder_bytes = 0
40 agaffney 492 self._arch = arch
41 agaffney 107 self._parted_dev = parted.PedDevice.get(self._device)
42     self._parted_disk = parted.PedDisk.new(self._parted_dev)
43     self.set_disk_geometry_from_disk()
44    
45 agaffney 509 ##
46 agaffney 513 # Sets disk geometry info from disk. This function is used internally by __init__()
47 agaffney 107 def set_disk_geometry_from_disk(self):
48     self._total_bytes = self._parted_dev.length * self._parted_dev.sector_size
49 agaffney 205 self._geometry['heads'], self._geometry['sectors'], self._geometry['cylinders'] = self._parted_dev.heads, self._parted_dev.sectors, self._parted_dev.cylinders
50 agaffney 212 self._sector_bytes = self._parted_dev.sector_size
51     self._cylinder_bytes = self._geometry['heads'] * self._geometry['sectors'] * self._sector_bytes
52     self._total_sectors = self._parted_dev.length
53 agaffney 107 self._sectors_in_cylinder = self._geometry['heads'] * self._geometry['sectors']
54 agaffney 492 self._total_mb = int(self._total_bytes / MEGABYTE)
55 agaffney 107
56 agaffney 509 ##
57 agaffney 513 # Sets partition info from disk.
58 agaffney 107 def set_partitions_from_disk(self):
59 agaffney 492 last_part = 0
60     last_log_part = 4
61 agaffney 107 parted_part = self._parted_disk.next_partition()
62 agaffney 492 while parted_part:
63     part_mb = int((parted_part.geom.end - parted_part.geom.start + 1) * self._sector_bytes / MEGABYTE)
64     if parted_part.num >= 1:
65 agaffney 113 fs_type = ""
66     if parted_part.fs_type != None: fs_type = parted_part.fs_type.name
67     if parted_part.type == 2: fs_type = "extended"
68 agaffney 501 if archinfo[self._arch]['extended'] and parted_part.num > 4:
69     last_log_part = parted_part.num
70     else:
71     last_part = parted_part.num
72 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)
73     elif parted_part.type_name == "free":
74     parent_part = self.get_partition_at(parted_part.geom.start, ignore_extended=0)
75     if parent_part:
76 agaffney 530 self._partitions[last_log_part+0.9] = Partition(self, last_log_part+0.9, part_mb, parted_part.geom.start, parted_part.geom.end, "free", format=False, existing=False)
77 agaffney 492 last_log_part += 1
78     else:
79 agaffney 530 self._partitions[last_part+0.1] = Partition(self, last_part+0.1, part_mb, parted_part.geom.start, parted_part.geom.end, "free", format=False, existing=False)
80 agaffney 492 last_part += 1
81     parted_part = self._parted_disk.next_partition(parted_part)
82 agaffney 107
83 agaffney 509 ##
84 agaffney 513 # Imports partition info from the install profile partition structure (currently does nothing)
85     # @param ips Parameter structure returned from install_profile.get_partition_tables()
86 agaffney 492 def set_partitions_from_install_profile_structure(self, ips):
87     pass
88     # for part in ips:
89     # tmppart = ips[part]
90     # existing = False
91     # parted_part = self._parted_disk.get_partition(part)
92     # if parted_part != None:
93     # start = parted_part.geom.start / self._sectors_in_cylinder
94     # end = parted_part.geom.end / self._sectors_in_cylinder
95     # fs_type = ""
96     # if parted_part.fs_type != None: fs_type = parted_part.fs_type.name
97     # if parted_part.type == 2: fs_type = "extended"
98     # if int(tmppart['start']) == int(start) and int(tmppart['end']) == int(end) and tmppart['type'] == fs_type and tmppart['format'] == False:
99     # existing = True
100     # self._partitions[int(part)] = Partition(self, part, '', tmppart['start'], tmppart['end'], 0, tmppart['type'], mountopts=tmppart['mountopts'], mountpoint=tmppart['mountpoint'], format=tmppart['format'], existing=(not tmppart['format']))
101    
102 agaffney 509 ##
103 agaffney 513 # Returns name of device (e.g. /dev/hda) being represented
104 agaffney 107 def get_device(self):
105     return self._device
106    
107 agaffney 509 ##
108 agaffney 513 # Combines free space and closes gaps in minor numbers. This is used internally
109 agaffney 494 def tidy_partitions(self):
110     last_minor = 0
111     last_log_minor = 4
112     last_free = 0
113     last_log_free = 0
114     parts = self._partitions.keys()
115     parts.sort()
116     for part in parts:
117 agaffney 497 if archinfo[self._arch]['extended'] and part > 4: break
118 agaffney 494 tmppart = self._partitions[part]
119     if tmppart.get_type() == "extended":
120     for part_log in parts:
121 agaffney 530 if part_log < 4.9: continue
122 agaffney 494 tmppart_log = self._partitions[part_log]
123     if tmppart_log.get_type() == "free":
124 agaffney 495 if last_log_minor < last_log_free:
125     self._partitions[last_log_free].set_mb(self._partitions[last_log_free].get_mb()+tmppart_log.get_mb())
126     del self._partitions[part_log]
127 agaffney 494 else:
128 agaffney 495 if not last_log_free:
129 agaffney 530 last_log_free = last_log_minor + 0.9
130 agaffney 544 else:
131     lost_log_free = part_log
132 agaffney 495 tmppart_log.set_minor(last_log_free)
133     self._partitions[last_log_free] = tmppart_log
134     if part_log != last_log_free: del self._partitions[part_log]
135     continue
136 agaffney 494 else:
137     if part_log > (last_log_minor + 1):
138     tmppart_log.set_minor(last_log_minor + 1)
139 agaffney 495 last_log_minor = last_log_minor + 1
140     self._partitions[last_log_minor] = tmppart_log
141     del self._partitions[part_log]
142     continue
143 agaffney 544 else:
144     last_log_minor = part_log
145 agaffney 494 if tmppart.get_type() == "free":
146 agaffney 495 if last_minor < last_free:
147     self._partitions[last_free].set_mb(self._partitions[last_free].get_mb()+tmppart.get_mb())
148     del self._partitions[part]
149 agaffney 494 else:
150 agaffney 495 if not last_free:
151 agaffney 530 last_free = last_minor + 0.1
152 agaffney 544 else:
153     last_free = part
154 agaffney 495 tmppart.set_minor(last_free)
155     self._partitions[last_free] = tmppart
156     if part != last_free: del self._partitions[part]
157     continue
158 agaffney 494 else:
159     if part > (last_minor + 1):
160     tmppart.set_minor(last_minor + 1)
161 agaffney 495 last_minor = last_minor + 1
162     self._partitions[last_minor] = tmppart
163     del self._partitions[part]
164     continue
165 agaffney 544 else:
166     last_minor = part
167 agaffney 494
168 agaffney 509 ##
169 agaffney 513 # Adds a new partition to the partition info
170     # @param free_minor minor of unallocated space partition is being created in
171     # @param mb size of partition in MB
172     # @param start Start sector (only used for existing partitions)
173     # @param end End sector (only used for existing partitions)
174     # @param type Partition type (ext2, ext3, fat32, linux-swap, free, extended, etc.)
175     # @param mountpoint='' Partition mountpoint
176     # @param mountopts='' Partition mount options
177 agaffney 492 def add_partition(self, free_minor, mb, start, end, type, mountpoint='', mountopts=''):
178 agaffney 530 free_minor = free_minor
179 agaffney 492 new_minor = int(free_minor) + 1
180 agaffney 494 # print "add_partition(): free_minor=" + str(free_minor) + ", new_minor=" + str(new_minor)
181 agaffney 492 if self._partitions.has_key(new_minor):
182 agaffney 107 parts = self._partitions.keys()
183     parts.sort()
184     parts.reverse()
185     hole_at = 0
186     for i in range(1, parts[0]+1):
187 agaffney 492 if i <= new_minor: continue
188     if not self._partitions.has_key(i):
189 agaffney 107 hole_at = i
190     break
191     stopscooting = 0
192     for i in parts:
193     if stopscooting: break
194 agaffney 492 if i >= hole_at and hole_at: continue
195     if i >= new_minor:
196 agaffney 107 self._partitions[i].set_minor(i+1)
197     self._partitions[i+1] = self._partitions[i]
198 agaffney 492 if i == new_minor: stopscooting = 1
199 agaffney 494 if mb != self._partitions[free_minor].get_mb():
200     old_free_mb = self._partitions[free_minor].get_mb()
201     del self._partitions[free_minor]
202 agaffney 497 if archinfo[self._arch]['extended'] and new_minor >= 5:
203 agaffney 530 free_minor = new_minor + 0.9
204 agaffney 494 else:
205 agaffney 530 free_minor = new_minor + 0.1
206 agaffney 494 self._partitions[free_minor] = Partition(self, free_minor, old_free_mb-mb, 0, 0, "free")
207     # print "add_partition(): new part doesn't use all freespace. new free part is: minor=" + str(free_minor)
208     else:
209     del self._partitions[free_minor]
210 agaffney 492 self._partitions[new_minor] = Partition(self, new_minor, mb, start, end, type, mountpoint=mountpoint, mountopts=mountopts)
211 agaffney 494 if type == "extended":
212 agaffney 530 self._partitions[4.9] = Partition(self, 4.9, mb, 0, 0, "free")
213 agaffney 494 self.tidy_partitions()
214 agaffney 107
215 agaffney 509 ##
216 agaffney 513 # Removes partition from partition info
217     # @param minor Minor of partition to remove
218 agaffney 107 def remove_partition(self, minor):
219 agaffney 492 tmppart = self._partitions[int(minor)]
220     free_minor = 0
221     if tmppart.is_logical():
222 agaffney 530 free_minor = minor-0.1
223 agaffney 492 else:
224 agaffney 530 free_minor = minor-0.9
225 agaffney 492 self._partitions[free_minor] = Partition(self, free_minor, tmppart.get_mb(), 0, 0, "free", format=False, existing=False)
226 agaffney 107 del self._partitions[int(minor)]
227 agaffney 494 self.tidy_partitions()
228 agaffney 107
229 agaffney 509 ##
230 agaffney 513 # Returns free space (no longer used)
231     # @param start Start sector for search
232 agaffney 107 def get_free_space(self, start):
233 agaffney 207 GAP_SIZE = 100
234 agaffney 107 parts = self._partitions.keys()
235     parts.sort()
236     lastend_pri = 0
237     lastend_log = 0
238     free_start = -1
239     free_end = -1
240 agaffney 205 if start > self._total_sectors: return (-1, -1)
241 agaffney 107 for part in parts:
242     if part > 4: break
243     tmppart = self._partitions[part]
244 agaffney 207 if (tmppart.get_start() > (lastend_pri + GAP_SIZE)) and (lastend_pri >= start):
245 agaffney 107 free_start = lastend_pri
246     free_end = tmppart.get_start() - 1
247     break
248     if tmppart.is_extended() and start < tmppart.get_end():
249     lastend_log = tmppart.get_start()
250     for part_log in parts:
251     if part_log < 5: continue
252     tmppart_log = self._partitions[part_log]
253 agaffney 207 if (tmppart_log.get_start() > (lastend_log + GAP_SIZE)) and (lastend_log >= start):
254 agaffney 107 free_start = lastend_log
255     free_end = tmppart_log.get_start() - 1
256     break
257     lastend_log = tmppart_log.get_end() + 1
258     if free_start == -1 and lastend_log < tmppart.get_end():
259     free_start = lastend_log
260     free_end = tmppart.get_end()
261 agaffney 112 break
262 agaffney 107 lastend_pri = tmppart.get_end() + 1
263 agaffney 205 if free_start == -1 and lastend_pri < self._total_sectors:
264 agaffney 107 free_start = lastend_pri
265 agaffney 205 free_end = self._total_sectors
266 agaffney 107 return (free_start, free_end)
267    
268 agaffney 509 ##
269 agaffney 513 # Gets partition containing a certain sector (no longer used)
270     # @param sector Sector to look at
271     # @param ignore_extended=1 Ignore extended partitions
272 agaffney 205 def get_partition_at(self, sector, ignore_extended=1):
273 agaffney 107 parts = self._partitions.keys()
274     parts.sort()
275     for part in parts:
276     tmppart = self._partitions[part]
277     if ignore_extended and tmppart.is_extended(): continue
278 agaffney 205 if (sector >= tmppart.get_start()) and (sector <= tmppart.get_end()):
279 agaffney 107 return part
280     return 0
281    
282 agaffney 509 ##
283 agaffney 513 # Returns free minor (no longer used)
284 agaffney 509 # @param start Parameter description
285     # @param end Parameter description
286 agaffney 107 def get_free_minor_at(self, start, end):
287     parts = self._partitions.keys()
288     parts.sort()
289     minor = 1
290     lastpart = 0
291     for part in parts:
292     if part > 4: break
293     tmppart = self._partitions[part]
294     if end < tmppart.get_start():
295     minor = part
296     if (minor - 1) > lastpart: minor = lastpart + 1
297     break
298     if tmppart.is_extended() and start < tmppart.get_end():
299     minor = 5
300     lastpart = 4
301     for part_log in parts:
302     if part_log < 5: continue
303     tmppart_log = self._partitions[part_log]
304     if end < tmppart_log.get_start():
305     minor = part_log
306     if (minor - 1) > lastpart: minor = lastpart + 1
307     break
308     minor = part_log + 1
309     lastpart = part_log
310     break
311     minor = part + 1
312     lastpart = part
313     return minor
314    
315 agaffney 509 ##
316 agaffney 513 # Returns an ordered list (disk order) of partition minors
317 agaffney 107 def get_ordered_partition_list(self):
318     parts = self._partitions.keys()
319     parts.sort()
320     partlist = []
321 agaffney 492 tmppart = None
322     for part in parts:
323 agaffney 530 if archinfo[self._arch]['extended'] and part > 4.1: break
324 agaffney 107 tmppart = self._partitions[part]
325 agaffney 492 partlist.append(part)
326 agaffney 107 if tmppart.is_extended():
327     for part_log in parts:
328 agaffney 530 if part_log < 4.9: continue
329 agaffney 492 partlist.append(part_log)
330 agaffney 107 return partlist
331    
332 agaffney 509 ##
333 agaffney 513 # Returns partition info in a format suitable for passing to install_profile.set_partition_tables()
334 agaffney 107 def get_install_profile_structure(self):
335     devdic = {}
336     for part in self._partitions:
337     tmppart = self._partitions[part]
338 agaffney 492 devdic[part] = { 'mb': tmppart.get_mb(), 'minor': float(part), 'origminor': tmppart.get_orig_minor(), 'start': tmppart.get_start(), 'end': tmppart.get_end(), 'type': tmppart.get_type(), 'mountpoint': tmppart.get_mountpoint(), 'mountopts': tmppart.get_mountopts(), 'format': tmppart.get_format() }
339 agaffney 107 return devdic
340    
341 agaffney 509 ##
342 agaffney 513 # Returns the minor of the extended partition, if any
343 agaffney 183 def get_extended_partition(self):
344     for part in self._partitions:
345     tmppart = self._partitions[part]
346     if tmppart.is_extended():
347     return part
348 agaffney 184 return 0
349 agaffney 183
350 agaffney 509 ##
351 agaffney 513 # Returns the number of sectors on the device
352 agaffney 107 def get_num_sectors(self):
353     return int(self._total_sectors)
354    
355 agaffney 509 ##
356 agaffney 513 # Returns the size of a cylinder in bytes
357 agaffney 107 def get_cylinder_size(self):
358     return int(self._cylinder_bytes)
359    
360 agaffney 509 ##
361 agaffney 513 # Returns the size of a sector in bytes
362 agaffney 212 def get_sector_size(self):
363     return int(self._sector_bytes)
364    
365 agaffney 509 ##
366 agaffney 513 # Returns the number of cylinders
367 agaffney 107 def get_num_cylinders(self):
368     return int(self._geometry['cylinders'])
369    
370 agaffney 509 ##
371 agaffney 513 # Returns the total number of bytes on the device
372 agaffney 107 def get_drive_bytes(self):
373     return int(self._total_bytes)
374    
375 agaffney 509 ##
376 agaffney 513 # Returns the total number of MB on the device
377 agaffney 492 def get_total_mb(self):
378     return self._total_mb
379    
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 509 ##
391 agaffney 513 # Utility function for running a command and returning it's output as a list
392     # @param cmd Command to run
393 agaffney 107 def _run(self, cmd):
394     "Runs a command and returns the output"
395    
396     # Run command
397     output_string = commands.getoutput(cmd)
398    
399     # What we will return
400     output_list = []
401    
402     # As long as there is a new line in the output_string
403     while output_string.find("\n") != -1:
404    
405     # Find the \n in the string
406     index = output_string.find("\n") + 1
407    
408     # Add the line to the output and remove it from
409     # the output_string
410     output_list.append(output_string[:index])
411     output_string = output_string[index:]
412    
413     # return output
414     return output_list
415    
416 agaffney 513 ##
417     # This class represents a partition within a GLIStorageDevice object
418 agaffney 107 class Partition:
419     "Class representing a single partition within a Device object"
420    
421     _device = None
422 agaffney 492 _minor = 0
423     _orig_minor = 0
424     _start = 0
425     _end = 0
426 agaffney 107 _type = None
427     _mountpoint = None
428     _mountopts = None
429     _format = None
430     _resizeable = None
431 agaffney 523 _min_mb_for_resize = 0
432 agaffney 492 _mb = 0
433 agaffney 107
434 agaffney 509 ##
435 agaffney 514 # Initialization function for the Partition class
436     # @param device Parent GLIStorageDevice object
437     # @param minor Minor of partition
438     # @param mb Parameter Size of partition in MB
439     # @param start Parameter Start sector of partition
440     # @param end Parameter Start sector of partition
441     # @param type Parameter Type of partition (ext2, ext3, fat32, linux-swap, free, extended, etc.)
442     # @param mountpoint='' Mountpoint of partition
443     # @param mountopts='' Mount options of partition
444     # @param format=True Format partition
445     # @param existing=False This partition exists on disk
446 agaffney 492 def __init__(self, device, minor, mb, start, end, type, mountpoint='', mountopts='', format=True, existing=False):
447 agaffney 107 self._device = device
448 agaffney 492 self._minor = float(minor)
449 agaffney 386 if existing: self._orig_minor = int(minor)
450 agaffney 107 self._start = int(start)
451     self._end = int(end)
452 agaffney 492 self._type = type or "unknown"
453 agaffney 107 self._mountpoint = mountpoint
454     self._mountopts = mountopts
455     self._format = format
456 agaffney 492 self._mb = mb
457 agaffney 231 if existing:
458 agaffney 492 self._orig_minor = self._minor
459 agaffney 231 parted_part = device._parted_disk.get_partition(minor)
460 agaffney 463 label_type = device._parted_disk.type.name
461     if label_type == "loop":
462 agaffney 466 dev_node = device._device
463     else:
464 agaffney 463 dev_node = device._device + str(minor)
465 agaffney 231 if type == "ntfs":
466 agaffney 463 min_bytes = int(commands.getoutput("ntfsresize -f --info " + dev_node + " | grep -e '^You might resize' | sed -e 's/You might resize at //' -e 's/ bytes or .\+//'"))
467 agaffney 523 self._min_mb_for_resize = int(min_bytes / MEGABYTE) + 1
468 agaffney 529 self._resizeable = True
469 agaffney 231 elif type == "ext2" or type == "ext3":
470 agaffney 530 block_size = int(string.strip(commands.getoutput("dumpe2fs -h " + dev_node + r" 2>&1 | grep -e '^Block size:' | sed -e 's/^Block size:\s\+//'")))
471     free_blocks = int(string.strip(commands.getoutput("dumpe2fs -h " + dev_node + r" 2>&1 | grep -e '^Free blocks:' | sed -e 's/^Free blocks:\s\+//'")))
472 agaffney 523 free_bytes = int(block_size * free_blocks)
473     # can't hurt to pad (the +50) it a bit since this is really just a guess
474     self._min_mb_for_resize = self._mb - int(free_bytes / MEGABYTE) + 50
475 agaffney 529 self._resizeable = True
476 agaffney 231 else:
477 agaffney 492 parted_part = self._device._parted_disk.get_partition(int(self._minor))
478 agaffney 301 try:
479     parted_fs = parted_part.geom.file_system_open()
480     except:
481     self._resizeable = False
482     return
483 agaffney 231 resize_constraint = parted_fs.get_resize_constraint()
484 agaffney 523 min_bytes = resize_constraint.min_size * self._device._sector_bytes
485     self._min_mb_for_resize = int(min_bytes / MEGABYTE) + 1
486 agaffney 231 self._resizeable = True
487 agaffney 107
488 agaffney 509 ##
489 agaffney 514 # Returns whether or not the partition is extended
490 agaffney 107 def is_extended(self):
491     if self._type == "extended":
492     return True
493     else:
494     return False
495    
496 agaffney 509 ##
497 agaffney 514 # Returns whether or not the partition is logical
498 agaffney 107 def is_logical(self):
499 agaffney 492 if self._type == "free":
500 agaffney 530 if int(self._minor) + 0.9 == self._minor:
501 agaffney 492 return True
502     else:
503     return False
504 agaffney 497 elif archinfo[self._device._arch]['extended'] and self._minor > 4:
505 agaffney 107 return True
506 agaffney 492 else:
507     return False
508 agaffney 107
509 agaffney 509 ##
510 agaffney 514 # Returns a list of logical partitions if this is an extended partition
511 agaffney 107 def get_logicals(self):
512 agaffney 184 if not self.is_extended():
513     return None
514 agaffney 107 logicals = []
515 agaffney 184 parts = self._device._partitions.keys()
516     parts.sort()
517     for part in parts:
518     if part < 5: continue
519 agaffney 107 logicals.append(part)
520     logicals.sort()
521     return logicals
522    
523 agaffney 509 ##
524 agaffney 514 # Returns the extened parent partition if this is a logical partition (no longer used)
525 agaffney 107 def get_extended_parent(self):
526 agaffney 184 if not self.is_logical():
527     return None
528     else:
529     return self._device.get_partition_at(self._start, ignore_extended=0)
530 agaffney 107
531 agaffney 509 ##
532 agaffney 514 # Sets the start sector for the partition
533     # @param start Start sector
534 agaffney 107 def set_start(self, start):
535     self._start = int(start)
536    
537 agaffney 509 ##
538 agaffney 514 # Returns the start sector for the partition
539 agaffney 107 def get_start(self):
540     return int(self._start)
541    
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     self._end = int(end)
547    
548 agaffney 509 ##
549 agaffney 514 # Returns end sector for the partition
550 agaffney 107 def get_end(self):
551     return int(self._end)
552    
553 agaffney 509 ##
554 agaffney 514 # Returns size of partition in MB
555 agaffney 492 def get_mb(self):
556     return int(self._mb)
557    
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     self._mb = int(mb)
563    
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     free_minor = self._minor + 0.9
662     else:
663     free_minor = self._minor + 0.1
664     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 544 free_minor += 0.9
678     else:
679     free_minor += 0.1
680     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     if not os.path.exists("/sys/bus"):
702 agaffney 556 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "no sysfs found (you MUST use a kernel >2.6)")
703 agaffney 107 # Make sure /proc/partitions exists
704     if not os.path.exists("/proc/partitions"):
705 agaffney 556 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "/proc/partitions does not exist! Please make sure procfs is in your kernel and mounted!")
706 agaffney 107
707     # Load /proc/partitions into the variable 'partitions'
708     partitions = []
709     for line in open("/proc/partitions"):
710 agaffney 556 if len(line.split()) < 4 or not line.split()[0].isdigit() or not line.split()[1].isdigit():
711 agaffney 107 continue
712    
713     # Get the major, minor and device name
714     major = line.split()[0]
715     minor = line.split()[1]
716     device = "/dev/" + line.split()[3]
717    
718     if not major.isdigit() or not minor.isdigit():
719     continue
720    
721     major = int(major)
722     minor = int(minor)
723    
724     # If there is no /dev/'device_name', then scan
725     # all the devices in /dev to try and find a
726     # devices with the same major and minor
727     if not os.path.exists(device):
728     device = None
729     for path, dirs, files in os.walk("/dev"):
730 agaffney 535 for d_file in files:
731     full_file = os.path.join(path, d_file)
732 agaffney 107 if not os.path.exists(full_file):
733     continue
734     statres = os.stat(full_file)
735     fmaj = os.major(statres.st_rdev)
736     fmin = os.minor(statres.st_rdev)
737     if fmaj == major and fmin == minor:
738     device = full_file
739     break
740     if not device:
741     continue
742    
743     partitions.append(( major, minor, device ))
744    
745     # Scan sysfs for the devices of type 'x'
746     # 'x' being a member of the list below:
747     for dev_type in [ "ide", "scsi" ]: # Other device types? usb? fw?
748     if os.path.exists("/sys/bus/" + dev_type):
749     sysfs_devices = os.listdir("/sys/bus/"+dev_type+"/devices")
750    
751     # For each device in the devices on that bus
752     for sysfs_device in sysfs_devices:
753 agaffney 556 dev_file = "/sys/bus/" + dev_type + "/devices/" + sysfs_device + "/block/dev"
754 agaffney 107
755     # If the file is not a block device, loop
756     if not os.path.exists(dev_file):
757     continue
758    
759     # Get the major and minor info
760     try:
761     major, minor = open(dev_file).read().split(":")
762     major = int(major)
763     minor = int(minor)
764     except:
765 agaffney 556 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "invalid major minor in " + dev_file)
766 agaffney 107
767     # Find a device listed in /proc/partitions
768     # that has the same minor and major as our
769     # current block device.
770     for record in partitions:
771     if major == record[0] and minor == record[1]:
772     devices.append(record[2])
773    
774     # We have assembled the list of devices, so return it
775     return devices

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