/[gli]/trunk/src/GLIStorageDevice.py
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1import commands, string, re, os, parted 1import commands, string, os, parted
2 2
3MEGABYTE = 1024 * 1024
4
5archinfo = { 'sparc': { 'fixedparts': [ { 'minor': 3, 'type': "wholedisk" } ], 'disklabel': 'sun', 'extended': False },
6 'hppa': { 'fixedparts': [ { 'minor': 1, 'type': "boot" } ], 'disklabel': 'msdos', 'extended': False },
7 'x86': { 'fixedparts': [], 'disklabel': 'msdos', 'extended': True },
8 'ppc': { 'fixedparts': [ { 'minor': 1, 'type': "metadata" } ], 'disklabel': 'mac', 'extended': False }
9 }
10
11##
12# This class provides a partitioning abstraction for the frontends
3class Device: 13class Device:
4 "Class representing a partitionable device." 14 "Class representing a partitionable device."
5 15
6 _device = None 16 _device = None
7 _partitions = None 17 _partitions = None
10 _total_sectors = 0 20 _total_sectors = 0
11 _cylinder_bytes = 0 21 _cylinder_bytes = 0
12 _sectors_in_cylinder = 0 22 _sectors_in_cylinder = 0
13 _parted_dev = None 23 _parted_dev = None
14 _parted_disk = None 24 _parted_disk = None
15 _fdiskcall = "fdisk -l " 25 _sector_bytes = 0
16 26 _total_mb = 0
27 _arch = None
28
29 ##
30 # Initialization function for GLIStorageDevice class
31 # @param device Device node (e.g. /dev/hda) of device being represented
32 # @param arch="x86" Architecture that we're partition for (defaults to 'x86' for now)
17 def __init__(self, device): 33 def __init__(self, device, arch="x86"):
18 self._device = device 34 self._device = device
19 self._partitions = {} 35 self._partitions = {}
20 self._geometry = {'cylinders': 0, 'heads': 0, 'sectors': 0, 'sectorsize': 512} 36 self._geometry = {'cylinders': 0, 'heads': 0, 'sectors': 0, 'sectorsize': 512}
21 self._total_bytes = 0 37 self._total_bytes = 0
22 self._cylinder_bytes = 0 38 self._cylinder_bytes = 0
39 self._arch = arch
23 self._parted_dev = parted.PedDevice.get(self._device) 40 self._parted_dev = parted.PedDevice.get(self._device)
24 self._parted_disk = parted.PedDisk.new(self._parted_dev) 41 self._parted_disk = parted.PedDisk.new(self._parted_dev)
25 self.set_disk_geometry_from_disk() 42 self.set_disk_geometry_from_disk()
26 43
44 ##
45 # Sets disk geometry info from disk. This function is used internally by __init__()
27 def set_disk_geometry_from_disk(self): 46 def set_disk_geometry_from_disk(self):
28 self._total_bytes = self._parted_dev.length * self._parted_dev.sector_size 47 self._total_bytes = self._parted_dev.length * self._parted_dev.sector_size
29 if string.strip(commands.getoutput("echo " + self._device + " | grep '/hd'")) == self._device: # IDE
30 proc_dir = "/proc/ide/" + commands.getoutput("echo " + self._device + " | cut -d '/' -f 3")
31 proc_dir = string.strip(proc_dir)
32 heads = commands.getoutput("cat " + proc_dir + "/geometry | grep logical | cut -d '/' -f 2")
33 sectors = commands.getoutput("cat " + proc_dir + "/geometry | grep logical | cut -d '/' -f 3")
34 total_sectors = commands.getoutput("cat " + proc_dir + "/capacity")
35 cylinders = int(total_sectors) / (int(heads) * int(sectors))
36 self._geometry['heads'], self._geometry['sectors'], self._geometry['cylinders'] = int(heads), int(sectors), int(cylinders)
37 else: #SCSI
38 self._geometry['heads'], self._geometry['sectors'], self._geometry['cylinders'] = self._parted_dev.heads, self._parted_dev.sectors, self._parted_dev.cylinders 48 self._geometry['heads'], self._geometry['sectors'], self._geometry['cylinders'] = self._parted_dev.heads, self._parted_dev.sectors, self._parted_dev.cylinders
49 self._sector_bytes = self._parted_dev.sector_size
39 self._cylinder_bytes = self._geometry['heads'] * self._geometry['sectors'] * self._parted_dev.sector_size 50 self._cylinder_bytes = self._geometry['heads'] * self._geometry['sectors'] * self._sector_bytes
40 self._total_sectors = self._geometry['cylinders'] * self._geometry['heads'] * self._geometry['sectors'] 51 self._total_sectors = self._parted_dev.length
41 self._sectors_in_cylinder = self._geometry['heads'] * self._geometry['sectors'] 52 self._sectors_in_cylinder = self._geometry['heads'] * self._geometry['sectors']
53 self._total_mb = int(self._total_bytes / MEGABYTE)
42 54
55 ##
56 # Sets partition info from disk.
43 def set_partitions_from_disk(self): 57 def set_partitions_from_disk(self):
58 last_part = 0
59 last_log_part = 4
44 parted_part = self._parted_disk.next_partition() 60 parted_part = self._parted_disk.next_partition()
45 while parted_part != None: 61 while parted_part:
62 part_mb = int((parted_part.geom.end - parted_part.geom.start + 1) * self._sector_bytes / MEGABYTE)
46 if parted_part.num < 1: 63 if parted_part.num >= 1:
47 parted_part = self._parted_disk.next_partition(parted_part)
48 continue
49 fs_type = ""
50 if parted_part.fs_type != None: fs_type = parted_part.fs_type.name
51 if parted_part.type == 2: fs_type = "extended"
52 self._partitions[int(parted_part.num)] = Partition(self, parted_part.num, '', (parted_part.geom.start / self._sectors_in_cylinder), (parted_part.geom.end / self._sectors_in_cylinder), (parted_part.geom.end - parted_part.geom.start), fs_type, format=False, existing=True)
53 parted_part = self._parted_disk.next_partition(parted_part)
54
55 def set_partitions_from_install_profile_structure(self, ips):
56 for part in ips:
57 tmppart = ips[part]
58 existing = False
59 parted_part = self._parted_disk.get_partition(part)
60 if parted_part != None:
61 start = parted_part.geom.start / self._sectors_in_cylinder
62 end = parted_part.geom.end / self._sectors_in_cylinder
63 fs_type = "" 64 fs_type = ""
64 if parted_part.fs_type != None: fs_type = parted_part.fs_type.name 65 if parted_part.fs_type != None: fs_type = parted_part.fs_type.name
65 if parted_part.type == 2: fs_type = "extended" 66 if parted_part.type == 2: fs_type = "extended"
67 if archinfo[self._arch]['extended'] and parted_part.num > 4:
68 last_log_part = parted_part.num
69 else:
70 last_part = parted_part.num
71 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)
72 elif parted_part.type_name == "free":
73 parent_part = self.get_partition_at(parted_part.geom.start, ignore_extended=0)
74 if parent_part:
75 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)
76 last_log_part += 1
77 else:
78 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)
79 last_part += 1
80 parted_part = self._parted_disk.next_partition(parted_part)
81
82 ##
83 # Imports partition info from the install profile partition structure (currently does nothing)
84 # @param ips Parameter structure returned from install_profile.get_partition_tables()
85 def set_partitions_from_install_profile_structure(self, ips):
86 pass
87# for part in ips:
88# tmppart = ips[part]
89# existing = False
90# parted_part = self._parted_disk.get_partition(part)
91# if parted_part != None:
92# start = parted_part.geom.start / self._sectors_in_cylinder
93# end = parted_part.geom.end / self._sectors_in_cylinder
94# fs_type = ""
95# if parted_part.fs_type != None: fs_type = parted_part.fs_type.name
96# if parted_part.type == 2: fs_type = "extended"
66 if int(tmppart['start']) == int(start) and int(tmppart['end']) == int(end) and tmppart['type'] == fs_type and tmppart['format'] == False: 97# if int(tmppart['start']) == int(start) and int(tmppart['end']) == int(end) and tmppart['type'] == fs_type and tmppart['format'] == False:
67 existing = True 98# existing = True
68 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'])) 99# 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']))
69 100
101 ##
102 # Returns name of device (e.g. /dev/hda) being represented
70 def get_device(self): 103 def get_device(self):
71 return self._device 104 return self._device
72 105
106 ##
107 # Combines free space and closes gaps in minor numbers. This is used internally
73 def clear_partitions(self): 108 def tidy_partitions(self):
74 self._partitions = {} 109 last_minor = 0
110 last_log_minor = 4
111 last_free = 0
112 last_log_free = 0
113 parts = self._partitions.keys()
114 parts.sort()
115 for part in parts:
116 if archinfo[self._arch]['extended'] and part > 4: break
117 tmppart = self._partitions[part]
118 if tmppart.get_type() == "extended":
119 for part_log in parts:
120 if part_log < 4.9: continue
121 tmppart_log = self._partitions[part_log]
122 if tmppart_log.get_type() == "free":
123 if last_log_minor < last_log_free:
124 self._partitions[last_log_free].set_mb(self._partitions[last_log_free].get_mb()+tmppart_log.get_mb())
125 del self._partitions[part_log]
126 else:
127 if not last_log_free:
128 last_log_free = last_log_minor + 0.9
129 tmppart_log.set_minor(last_log_free)
130 self._partitions[last_log_free] = tmppart_log
131 if part_log != last_log_free: del self._partitions[part_log]
132 continue
133 last_log_free = part_log
134 else:
135 if part_log > (last_log_minor + 1):
136 tmppart_log.set_minor(last_log_minor + 1)
137 last_log_minor = last_log_minor + 1
138 self._partitions[last_log_minor] = tmppart_log
139 del self._partitions[part_log]
140 continue
141 last_log_minor = part_log
142 if tmppart.get_type() == "free":
143 if last_minor < last_free:
144 self._partitions[last_free].set_mb(self._partitions[last_free].get_mb()+tmppart.get_mb())
145 del self._partitions[part]
146 else:
147 if not last_free:
148 last_free = last_minor + 0.1
149 tmppart.set_minor(last_free)
150 self._partitions[last_free] = tmppart
151 if part != last_free: del self._partitions[part]
152 continue
153 last_free = part
154 else:
155 if part > (last_minor + 1):
156 tmppart.set_minor(last_minor + 1)
157 last_minor = last_minor + 1
158 self._partitions[last_minor] = tmppart
159 del self._partitions[part]
160 continue
161 last_minor = part
75 162
76 def add_partition(self, minor, start, end, type): 163 ##
77 free_start, free_end = self.get_free_space(start) 164 # Adds a new partition to the partition info
165 # @param free_minor minor of unallocated space partition is being created in
166 # @param mb size of partition in MB
167 # @param start Start sector (only used for existing partitions)
168 # @param end End sector (only used for existing partitions)
169 # @param type Partition type (ext2, ext3, fat32, linux-swap, free, extended, etc.)
170 # @param mountpoint='' Partition mountpoint
171 # @param mountopts='' Partition mount options
172 def add_partition(self, free_minor, mb, start, end, type, mountpoint='', mountopts=''):
173 free_minor = free_minor
78 minor = int(minor) 174 new_minor = int(free_minor) + 1
79 if not free_end: 175# print "add_partition(): free_minor=" + str(free_minor) + ", new_minor=" + str(new_minor)
80 return False
81 if self._partitions.has_key(minor): 176 if self._partitions.has_key(new_minor):
82 parts = self._partitions.keys() 177 parts = self._partitions.keys()
83 parts.sort() 178 parts.sort()
84 parts.reverse() 179 parts.reverse()
85 hole_at = 0 180 hole_at = 0
86 for i in range(1, parts[0]+1): 181 for i in range(1, parts[0]+1):
87 if i <= minor: continue 182 if i <= new_minor: continue
88 if not self._partitions.has_key(int(i)): 183 if not self._partitions.has_key(i):
89 hole_at = i 184 hole_at = i
90 break 185 break
91 stopscooting = 0 186 stopscooting = 0
92 for i in parts: 187 for i in parts:
93 if stopscooting: break 188 if stopscooting: break
94 if (i >= hole_at) and (hole_at): continue 189 if i >= hole_at and hole_at: continue
95 if i >= minor: 190 if i >= new_minor:
96 self._partitions[i].set_minor(i+1) 191 self._partitions[i].set_minor(i+1)
97 self._partitions[i+1] = self._partitions[i] 192 self._partitions[i+1] = self._partitions[i]
98 if i == minor: stopscooting = 1 193 if i == new_minor: stopscooting = 1
99 self._partitions[minor] = Partition(self, minor, '', start, end, 0, type) 194 if mb != self._partitions[free_minor].get_mb():
195 old_free_mb = self._partitions[free_minor].get_mb()
196 del self._partitions[free_minor]
197 if archinfo[self._arch]['extended'] and new_minor >= 5:
198 free_minor = new_minor + 0.9
199 else:
200 free_minor = new_minor + 0.1
201 self._partitions[free_minor] = Partition(self, free_minor, old_free_mb-mb, 0, 0, "free")
202# print "add_partition(): new part doesn't use all freespace. new free part is: minor=" + str(free_minor)
203 else:
204 del self._partitions[free_minor]
205 self._partitions[new_minor] = Partition(self, new_minor, mb, start, end, type, mountpoint=mountpoint, mountopts=mountopts)
206 if type == "extended":
207 self._partitions[4.9] = Partition(self, 4.9, mb, 0, 0, "free")
208 self.tidy_partitions()
100 209
210 ##
211 # Removes partition from partition info
212 # @param minor Minor of partition to remove
101 def remove_partition(self, minor): 213 def remove_partition(self, minor):
214 tmppart = self._partitions[int(minor)]
215 free_minor = 0
216 if tmppart.is_logical():
217 free_minor = minor-0.1
218 else:
219 free_minor = minor-0.9
220 self._partitions[free_minor] = Partition(self, free_minor, tmppart.get_mb(), 0, 0, "free", format=False, existing=False)
102 del self._partitions[int(minor)] 221 del self._partitions[int(minor)]
222 self.tidy_partitions()
103 223
224 ##
225 # Returns free space (no longer used)
226 # @param start Start sector for search
104 def get_free_space(self, start): 227 def get_free_space(self, start):
228 GAP_SIZE = 100
105 parts = self._partitions.keys() 229 parts = self._partitions.keys()
106 parts.sort() 230 parts.sort()
107 lastend_pri = 0 231 lastend_pri = 0
108 lastend_log = 0 232 lastend_log = 0
109 free_start = -1 233 free_start = -1
110 free_end = -1 234 free_end = -1
111 if start > self.get_num_cylinders(): return (-1, -1) 235 if start > self._total_sectors: return (-1, -1)
112 for part in parts: 236 for part in parts:
113 if part > 4: break 237 if part > 4: break
114 tmppart = self._partitions[part] 238 tmppart = self._partitions[part]
115 if (tmppart.get_start() > lastend_pri) and (lastend_pri >= start): 239 if (tmppart.get_start() > (lastend_pri + GAP_SIZE)) and (lastend_pri >= start):
116 free_start = lastend_pri 240 free_start = lastend_pri
117 free_end = tmppart.get_start() - 1 241 free_end = tmppart.get_start() - 1
118 break 242 break
119 if tmppart.is_extended() and start < tmppart.get_end(): 243 if tmppart.is_extended() and start < tmppart.get_end():
120 lastend_log = tmppart.get_start() 244 lastend_log = tmppart.get_start()
121 for part_log in parts: 245 for part_log in parts:
122 if part_log < 5: continue 246 if part_log < 5: continue
123 tmppart_log = self._partitions[part_log] 247 tmppart_log = self._partitions[part_log]
124 if (tmppart_log.get_start() > lastend_log) and (lastend_log >= start): 248 if (tmppart_log.get_start() > (lastend_log + GAP_SIZE)) and (lastend_log >= start):
125 free_start = lastend_log 249 free_start = lastend_log
126 free_end = tmppart_log.get_start() - 1 250 free_end = tmppart_log.get_start() - 1
127 break 251 break
128 lastend_log = tmppart_log.get_end() + 1 252 lastend_log = tmppart_log.get_end() + 1
129 if free_start == -1 and lastend_log < tmppart.get_end(): 253 if free_start == -1 and lastend_log < tmppart.get_end():
130 free_start = lastend_log 254 free_start = lastend_log
131 free_end = tmppart.get_end() 255 free_end = tmppart.get_end()
132 break 256 break
133 lastend_pri = tmppart.get_end() + 1 257 lastend_pri = tmppart.get_end() + 1
134 if free_start == -1 and lastend_pri < self.get_num_cylinders(): 258 if free_start == -1 and lastend_pri < self._total_sectors:
135 free_start = lastend_pri 259 free_start = lastend_pri
136 free_end = self.get_num_cylinders() 260 free_end = self._total_sectors
137 return (free_start, free_end) 261 return (free_start, free_end)
138 262
263 ##
264 # Gets partition containing a certain sector (no longer used)
265 # @param sector Sector to look at
266 # @param ignore_extended=1 Ignore extended partitions
139 def get_partition_at(self, cylinder, ignore_extended=1): 267 def get_partition_at(self, sector, ignore_extended=1):
140 parts = self._partitions.keys() 268 parts = self._partitions.keys()
141 parts.sort() 269 parts.sort()
142 for part in parts: 270 for part in parts:
143 tmppart = self._partitions[part] 271 tmppart = self._partitions[part]
144 if ignore_extended and tmppart.is_extended(): continue 272 if ignore_extended and tmppart.is_extended(): continue
145 if (cylinder >= tmppart.get_start()) and (cylinder <= tmppart.get_end()): 273 if (sector >= tmppart.get_start()) and (sector <= tmppart.get_end()):
146 return part 274 return part
147 return 0 275 return 0
148 276
277 ##
278 # Returns free minor (no longer used)
279 # @param start Parameter description
280 # @param end Parameter description
149 def get_free_minor_at(self, start, end): 281 def get_free_minor_at(self, start, end):
150 parts = self._partitions.keys() 282 parts = self._partitions.keys()
151 parts.sort() 283 parts.sort()
152 minor = 1 284 minor = 1
153 lastpart = 0 285 lastpart = 0
173 break 305 break
174 minor = part + 1 306 minor = part + 1
175 lastpart = part 307 lastpart = part
176 return minor 308 return minor
177 309
310 ##
311 # Returns an ordered list (disk order) of partition minors
178 def get_ordered_partition_list(self): 312 def get_ordered_partition_list(self):
179 parts = self._partitions.keys() 313 parts = self._partitions.keys()
180 parts.sort() 314 parts.sort()
181 partlist = [] 315 partlist = []
182 free_start, free_end = self.get_free_space(0)
183 tmppart = None
184 tmppart_log = None 316 tmppart = None
185 for part in parts: 317 for part in parts:
186 if part > 4: break 318 if archinfo[self._arch]['extended'] and part > 4.1: break
187 tmppart = self._partitions[part] 319 tmppart = self._partitions[part]
188 if free_end < tmppart.get_start() and not free_start == -1:
189 partlist.append("Free Space (" + str(free_start) + "-" + str(free_end) + ")")
190 free_start, free_end = self.get_free_space(free_end)
191 newitem = self._device + str(part) + ": " + str(tmppart.get_start()) + "-" + str(tmppart.get_end())
192 if tmppart.is_extended(): newitem = newitem + " extended"
193 partlist.append(newitem) 320 partlist.append(part)
194 if tmppart.is_extended(): 321 if tmppart.is_extended():
195 for part_log in parts: 322 for part_log in parts:
196 if part_log < 5: continue 323 if part_log < 4.9: continue
197 tmppart_log = self._partitions[part_log]
198 if free_end < tmppart_log.get_start() and free_end <= tmppart.get_end() and not free_start == -1:
199 partlist.append("Free Space (" + str(free_start) + "-" + str(free_end) + ")")
200 free_start, free_end = self.get_free_space(free_end)
201 newitem = self._device + str(part_log) + ": " + str(tmppart_log.get_start()) + "-" + str(tmppart_log.get_end()) + " logical"
202 partlist.append(newitem) 324 partlist.append(part_log)
203 if ((tmppart_log == None) or (free_start > tmppart_log.get_end())) and free_start < tmppart.get_end():
204 partlist.append("Free Space (" + str(free_start) + "-" + str(free_end) + ") logical")
205 free_start, free_end = self.get_free_space(free_end)
206 if (tmppart == None) or (free_start > tmppart.get_end()):
207 partlist.append("Free Space (" + str(free_start) + "-" + str(free_end) + ")")
208 return partlist 325 return partlist
209 326
327 ##
328 # Returns partition info in a format suitable for passing to install_profile.set_partition_tables()
210 def get_install_profile_structure(self): 329 def get_install_profile_structure(self):
211 devdic = {} 330 devdic = {}
212 for part in self._partitions: 331 for part in self._partitions:
213 tmppart = self._partitions[part] 332 tmppart = self._partitions[part]
214 devdic[part] = { 'mb': 0, 'start': tmppart.get_start(), 'end': tmppart.get_end(), 'type': tmppart.get_type(), 'mountpoint': tmppart.get_mountpoint(), 'mountopts': tmppart.get_mountopts(), 'format': tmppart.get_format() } 333 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() }
215 return devdic 334 return devdic
216 335
336 ##
337 # Returns the minor of the extended partition, if any
338 def get_extended_partition(self):
339 for part in self._partitions:
340 tmppart = self._partitions[part]
341 if tmppart.is_extended():
342 return part
343 return 0
344
345 ##
346 # Returns the number of sectors on the device
217 def get_num_sectors(self): 347 def get_num_sectors(self):
218 return int(self._total_sectors) 348 return int(self._total_sectors)
219 349
350 ##
351 # Returns the size of a cylinder in bytes
220 def get_cylinder_size(self): 352 def get_cylinder_size(self):
221 return int(self._cylinder_bytes) 353 return int(self._cylinder_bytes)
222 354
355 ##
356 # Returns the size of a sector in bytes
357 def get_sector_size(self):
358 return int(self._sector_bytes)
359
360 ##
361 # Returns the number of cylinders
223 def get_num_cylinders(self): 362 def get_num_cylinders(self):
224 return int(self._geometry['cylinders']) 363 return int(self._geometry['cylinders'])
225 364
365 ##
366 # Returns the total number of bytes on the device
226 def get_drive_bytes(self): 367 def get_drive_bytes(self):
227 return int(self._total_bytes) 368 return int(self._total_bytes)
228 369
370 ##
371 # Returns the total number of MB on the device
372 def get_total_mb(self):
373 return self._total_mb
374
375 ##
376 # Returns partition info dictionary
229 def get_partitions(self): 377 def get_partitions(self):
230 return self._partitions 378 return self._partitions
231 379
232 def print_partitions(self): 380 ##
233 for part in self._partitions.keys(): 381 # Prints disk geometry to STDOUT (no longer used)
234 print self._partitions[part].return_info()
235
236 def print_geometry(self): 382 def print_geometry(self):
237 print self._total_bytes, self._geometry 383 print self._total_bytes, self._geometry
238 384
385 ##
386 # Utility function for raising an exception
387 # @param message Error message
239 def _error(self, message): 388 def _error(self, message):
240 "Raises an exception" 389 "Raises an exception"
241 raise "DeviceObjectError", message 390 raise GLIException("DeviceObjectError", 'fatal', 'Device', message)
242 391
392 ##
393 # Utility function for running a command and returning it's output as a list
394 # @param cmd Command to run
243 def _run(self, cmd): 395 def _run(self, cmd):
244 "Runs a command and returns the output" 396 "Runs a command and returns the output"
245 397
246 # Run command 398 # Run command
247 output_string = commands.getoutput(cmd) 399 output_string = commands.getoutput(cmd)
261 output_string = output_string[index:] 413 output_string = output_string[index:]
262 414
263 # return output 415 # return output
264 return output_list 416 return output_list
265 417
266 418##
419# This class represents a partition within a GLIStorageDevice object
267class Partition: 420class Partition:
268 "Class representing a single partition within a Device object" 421 "Class representing a single partition within a Device object"
269 422
270 _device = None 423 _device = None
271 _minor = None 424 _minor = 0
272 _bootflag = None 425 _orig_minor = 0
273 _start = None 426 _start = 0
274 _end = None 427 _end = 0
275 _blocks = None
276 _type = None 428 _type = None
277 _mountpoint = None 429 _mountpoint = None
278 _mountopts = None 430 _mountopts = None
279 _format = None 431 _format = None
280 _resizeable = None 432 _resizeable = None
281 _min_cylinders_for_resize = 0 433 _min_mb_for_resize = 0
434 _mb = 0
282 435
436 ##
437 # Initialization function for the Partition class
438 # @param device Parent GLIStorageDevice object
439 # @param minor Minor of partition
440 # @param mb Parameter Size of partition in MB
441 # @param start Parameter Start sector of partition
442 # @param end Parameter Start sector of partition
443 # @param type Parameter Type of partition (ext2, ext3, fat32, linux-swap, free, extended, etc.)
444 # @param mountpoint='' Mountpoint of partition
445 # @param mountopts='' Mount options of partition
446 # @param format=True Format partition
447 # @param existing=False This partition exists on disk
283 def __init__(self, device, minor, bootflag, start, end, blocks, type, mountpoint='', mountopts='', format=True, existing=False): 448 def __init__(self, device, minor, mb, start, end, type, mountpoint='', mountopts='', format=True, existing=False):
284 self._device = device 449 self._device = device
285 self._minor = int(minor) 450 self._minor = float(minor)
286 self._bootflag = bootflag 451 if existing: self._orig_minor = int(minor)
287 self._start = int(start) 452 self._start = int(start)
288 self._end = int(end) 453 self._end = int(end)
289 self._blocks = int(blocks) 454 self._type = type or "unknown"
290 self._type = type
291 self._mountpoint = mountpoint 455 self._mountpoint = mountpoint
292 self._mountopts = mountopts 456 self._mountopts = mountopts
293 self._format = format 457 self._format = format
294 if blocks == 0: 458 self._mb = mb
295 self._blocks = ((self._end - self._start) * self._device.get_cylinder_size()) / 512
296 if existing: 459 if existing:
460 self._orig_minor = self._minor
297 parted_part = device._parted_disk.get_partition(minor) 461 parted_part = device._parted_disk.get_partition(minor)
462 label_type = device._parted_disk.type.name
463 if label_type == "loop":
464 dev_node = device._device
465 else:
466 dev_node = device._device + str(minor)
298 if type == "ntfs": 467 if type == "ntfs":
299 min_bytes = int(commands.getoutput("ntfsresize --info " + device._device + str(minor) + " | grep -e '^You might resize' | sed -e 's/You might resize at //' -e 's/ bytes or .\+//'")) 468 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 .\+//'"))
300 self._min_cylinders_for_resize = int(min_bytes / self._device._cylinder_bytes) + 1 469 self._min_mb_for_resize = int(min_bytes / MEGABYTE) + 1
301 self._resizeable == True 470 self._resizeable = True
302 elif type == "ext2" or type == "ext3": 471 elif type == "ext2" or type == "ext3":
303 commands.system("mkdir /mnt/freespace; mount " + device._device + str(minor) + " /mnt/freespace") 472 block_size = int(string.strip(commands.getoutput("dumpe2fs -h " + dev_node + r" 2>&1 | grep -e '^Block size:' | sed -e 's/^Block size:\s\+//'")))
304 min_bytes = int(commands.getoutput("df -B kB " + device._device + str(minor) + " | tail -n 1 | sed -e 's:^" + device._device + str(minor) + "\s\+[0-9]\+kB\s\+::' -e 's:kB\s.\+::'")) * 1000 473 free_blocks = int(string.strip(commands.getoutput("dumpe2fs -h " + dev_node + r" 2>&1 | grep -e '^Free blocks:' | sed -e 's/^Free blocks:\s\+//'")))
305 commands.system("umount /mnt/freespace; rm -rf /mnt/freespace") 474 free_bytes = int(block_size * free_blocks)
306 min_bytes = min_bytes + (100 * 1024 * 1024) # Add 100M just to be safe 475 # can't hurt to pad (the +50) it a bit since this is really just a guess
307 self._min_cylinders_for_resize = int(min_bytes / self._device._cylinder_bytes) + 1 476 self._min_mb_for_resize = self._mb - int(free_bytes / MEGABYTE) + 50
308 self._resizeable == True 477 self._resizeable = True
309 elif type == "fat16" or type == "fat32": 478 else:
310 parted_part = self._device._parted_disk.get_partition(self._minor) 479 parted_part = self._device._parted_disk.get_partition(int(self._minor))
480 try:
311 parted_fs = parted_part.geom.file_system_open() 481 parted_fs = parted_part.geom.file_system_open()
482 except:
483 self._resizeable = False
484 return
312 resize_constraint = parted_fs.get_resize_constraint() 485 resize_constraint = parted_fs.get_resize_constraint()
313 min_size = float(resize_constraint.min_size / self._device._sectors_in_cylinder) 486 min_bytes = resize_constraint.min_size * self._device._sector_bytes
314 if int(min_size) != min_size: min_size = int(min_size) + 1 487 self._min_mb_for_resize = int(min_bytes / MEGABYTE) + 1
315 self._min_cylinders_for_resize = min_size
316 self._resizeable = True 488 self._resizeable = True
317 elif type == "":
318 self._min_cylinders_for_resize = 1
319 self._resizeable = True
320 else:
321 self._resizeable = True
322 489
490 ##
491 # Returns whether or not the partition is extended
323 def is_extended(self): 492 def is_extended(self):
324 if self._type == "extended": 493 if self._type == "extended":
325 return True 494 return True
326 else: 495 else:
327 return False 496 return False
328 497
498 ##
499 # Returns whether or not the partition is logical
329 def is_logical(self): 500 def is_logical(self):
330 part = self._device.get_partition_at(self._start, ignore_extended=0) 501 if self._type == "free":
331 if part and self._device._partitions[part].is_extended() and not part == self._minor: 502 if int(self._minor) + 0.9 == self._minor:
503 return True
504 else:
505 return False
506 elif archinfo[self._device._arch]['extended'] and self._minor > 4:
332 return True 507 return True
508 else:
333 return False 509 return False
334 510
511 ##
512 # Returns a list of logical partitions if this is an extended partition
335 def get_logicals(self): 513 def get_logicals(self):
514 if not self.is_extended():
515 return None
336 logicals = [] 516 logicals = []
337 start = self._start
338 while not start > self._end:
339 part = self._device.get_partition_at(start) 517 parts = self._device._partitions.keys()
340 if not part: break 518 parts.sort()
519 for part in parts:
520 if part < 5: continue
341 logicals.append(part) 521 logicals.append(part)
342 start = self._device._partitions[part].get_end() + 1
343 logicals.sort() 522 logicals.sort()
344 return logicals 523 return logicals
345 524
525 ##
526 # Returns the extened parent partition if this is a logical partition (no longer used)
346 def get_extended_parent(self): 527 def get_extended_parent(self):
528 if not self.is_logical():
529 return None
530 else:
347 return self._device.get_partition_at(self._start, ignore_extended=0) 531 return self._device.get_partition_at(self._start, ignore_extended=0)
348 532
533 ##
534 # Sets the start sector for the partition
535 # @param start Start sector
349 def set_start(self, start): 536 def set_start(self, start):
350 self._start = int(start) 537 self._start = int(start)
351 self._blocks = ((self._end - self._start) * self._device.get_cylinder_size()) / 512
352 538
539 ##
540 # Returns the start sector for the partition
353 def get_start(self): 541 def get_start(self):
354 return int(self._start) 542 return int(self._start)
355 543
544 ##
545 # Sets the end sector of the partition
546 # @param end End sector
356 def set_end(self, end): 547 def set_end(self, end):
357 self._end = int(end) 548 self._end = int(end)
358 self._blocks = ((self._end - self._start) * self._device.get_cylinder_size()) / 512
359 549
550 ##
551 # Returns end sector for the partition
360 def get_end(self): 552 def get_end(self):
361 return int(self._end) 553 return int(self._end)
362 554
555 ##
556 # Returns size of partition in MB
557 def get_mb(self):
558 return int(self._mb)
559
560 ##
561 # Sets size of partition in MB
562 # @param mb Parameter description
563 def set_mb(self, mb):
564 self._mb = int(mb)
565
566 ##
567 # Sets type of partition
568 # @param type Parameter description
363 def set_type(self, type): 569 def set_type(self, type):
364 self._type = type 570 self._type = type
365 571
572 ##
573 # Returns type of partition
366 def get_type(self): 574 def get_type(self):
367 return self._type 575 return self._type
368 576
577 ##
578 # Returns parent GLIStorageDevice object
369 def get_device(self): 579 def get_device(self):
370 return self._device 580 return self._device
371 581
582 ##
583 # Sets minor of partition
584 # @param minor New minor
372 def set_minor(self, minor): 585 def set_minor(self, minor):
373 self._minor = int(minor) 586 self._minor = float(minor)
374 587
588 ##
589 # Returns minor of partition
375 def get_minor(self): 590 def get_minor(self):
376 return int(self._minor) 591 return float(self._minor)
377 592
593 ##
594 # Sets the original minor of the partition
595 # @param orig_minor Parameter description
596 def set_orig_minor(self, orig_minor):
597 self._orig_minor = int(orig_minor)
598
599 ##
600 # Returns the original minor of the partition
601 def get_orig_minor(self):
602 return self._orig_minor
603
604 ##
605 # Sets the mountpoint for the partition
606 # @param mountpoint Mountpoint
378 def set_mountpoint(self, mountpoint): 607 def set_mountpoint(self, mountpoint):
379 self._mountpoint = mountpoint 608 self._mountpoint = mountpoint
380 609
610 ##
611 # Returns the mountpoint for the partition
381 def get_mountpoint(self): 612 def get_mountpoint(self):
382 return self._mountpoint 613 return self._mountpoint
383 614
615 ##
616 # Sets the mount options for the partition
617 # @param mountopts Mount options
384 def set_mountopts(self, mountopts): 618 def set_mountopts(self, mountopts):
385 self._mountopts = mountopts 619 self._mountopts = mountopts
386 620
621 ##
622 # Returns the mount options for the partition
387 def get_mountopts(self): 623 def get_mountopts(self):
388 return self._mountopts 624 return self._mountopts
389 625
626 ##
627 # Set whether to format the partition
628 # @param format Format this partition (True/False)
390 def set_format(self, format): 629 def set_format(self, format):
391 self._format = format 630 self._format = format
392 631
632 ##
633 # Returns whether to format the partition
393 def get_format(self): 634 def get_format(self):
394 return self._format 635 return self._format
395 636
396 def get_blocks(self): 637 ##
397 return int(self._blocks) 638 # Returns whether the partition is resizeable
639 def is_resizeable(self):
640 return self._resizeable
398 641
642 ##
643 # Returns minimum MB for resize
399 def get_min_cylinders_for_resize(self): 644 def get_min_mb_for_resize(self):
400# min_size = self._start + 1
401# if not self._format:
402# parted_part = self._device._parted_disk.get_partition(self._minor)
403# parted_fs = parted_part.geom.file_system_open()
404# resize_constraint = parted_fs.get_resize_constraint()
405# min_size = float(resize_constraint.min_size / self._device._sectors_in_cylinder)
406# if int(min_size) != min_size: min_size = int(min_size) + 1
407# min_size = min_size + self._start
408#################################################
409 if self.is_extended(): 645# if self.is_extended():
410 min_size = self._start 646# min_size = self._start
411 for part in self._device._partitions: 647# for part in self._device._partitions:
412 if part < 5: continue 648# if part < 5: continue
413 min_size = part.get_end() 649# if part.get_end > min_size: min_size = part.get_end()
650# return min_size
651# else:
652 if self._resizeable:
653 return self._min_mb_for_resize
414 else: 654 else:
415 return self._min_cylinders_for_resize 655 return -1
416 656
657 ##
658 # Returns maximum MB for resize
417 def get_max_cylinders_for_resize(self): 659 def get_max_mb_for_resize(self):
418 free_start, free_end = self._device.get_free_space(self._end) 660 free_minor = 0
419 if free_end == -1: return self._end
420 if free_start - 1 == self._end:
421 if self.is_logical(): 661 if self.is_logical():
422 if free_end <= self._device._partitions[self.get_extended_parent()]._end: 662 free_minor = self._minor + 0.9
423 return free_end
424 else:
425 return self._end
426 else: 663 else:
427 return free_end 664 free_minor = self._minor + 0.1
665 if free_minor in self._device._partitions:
666 return self._mb + self._device._partitions[free_minor]._mb
667 else:
668 return self._mb
428 669
670 ##
671 # Resizes the partition (ignore)
672 # @param start New start sector
673 # @param end New end sector
429 def resize(self, start, end): 674 def resize(self, start, end):
430 part_at_start = self._device.get_partition_at(int(start)) 675 part_at_start = self._device.get_partition_at(int(start))
431 part_at_end = self._device.get_partition_at(int(end)) 676 part_at_end = self._device.get_partition_at(int(end))
432 logicals = None 677 logicals = None
433 if self.is_logical(): 678 if self.is_logical():
447 return 0 692 return 0
448 self.set_start(start) 693 self.set_start(start)
449 self.set_end(end) 694 self.set_end(end)
450 return 1 695 return 1
451 696
697 ##
698 # Utility function to raise an exception
699 # @param message Error message
452 def _error(self, message): 700 def _error(self, message):
453 "Raises an exception" 701 raise GLIException("PartitionObjectError", 'fatal', 'Partition', message)
454 raise "PartitionObjectError", message
455
456 702
703##
704# Returns a list of detected partitionable devices
457def detect_devices(): 705def detect_devices():
458 "Returns a list of partitionable devices on the system"
459
460 devices = [] 706 devices = []
461 707
462 # Make sure sysfs exists 708 # Make sure sysfs exists
463 if not os.path.exists("/sys/bus"): 709 if not os.path.exists("/sys/bus"):
464 raise Exception, "no sysfs found (you MUST use a kernel >2.6)" 710 raise Exception, "no sysfs found (you MUST use a kernel >2.6)"
488 # all the devices in /dev to try and find a 734 # all the devices in /dev to try and find a
489 # devices with the same major and minor 735 # devices with the same major and minor
490 if not os.path.exists(device): 736 if not os.path.exists(device):
491 device = None 737 device = None
492 for path, dirs, files in os.walk("/dev"): 738 for path, dirs, files in os.walk("/dev"):
493 for file in files: 739 for d_file in files:
494 full_file = os.path.join(path, file) 740 full_file = os.path.join(path, d_file)
495 if not os.path.exists(full_file): 741 if not os.path.exists(full_file):
496 continue 742 continue
497 statres = os.stat(full_file) 743 statres = os.stat(full_file)
498 fmaj = os.major(statres.st_rdev) 744 fmaj = os.major(statres.st_rdev)
499 fmin = os.minor(statres.st_rdev) 745 fmin = os.minor(statres.st_rdev)

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