/[gli]/trunk/src/GLIStorageDevice.py
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1import commands, string, re, os, parted 1import commands, string, re, os, parted
2from decimal import Decimal
2 3
4MEGABYTE = 1024 * 1024
5
6archinfo = { '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##
13# This class provides a partitioning abstraction for the frontends
3class Device: 14class Device:
4 "Class representing a partitionable device." 15 "Class representing a partitionable device."
5 16
6 _device = None 17 _device = None
7 _partitions = None 18 _partitions = None
10 _total_sectors = 0 21 _total_sectors = 0
11 _cylinder_bytes = 0 22 _cylinder_bytes = 0
12 _sectors_in_cylinder = 0 23 _sectors_in_cylinder = 0
13 _parted_dev = None 24 _parted_dev = None
14 _parted_disk = None 25 _parted_disk = None
15 _fdiskcall = "fdisk -l " 26 _sector_bytes = 0
16 27 _total_mb = 0
28 _arch = None
29
30 ##
31 # 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)
17 def __init__(self, device): 34 def __init__(self, device, arch="x86"):
18 self._device = device 35 self._device = device
19 self._partitions = {} 36 self._partitions = {}
20 self._geometry = {'cylinders': 0, 'heads': 0, 'sectors': 0, 'sectorsize': 512} 37 self._geometry = {'cylinders': 0, 'heads': 0, 'sectors': 0, 'sectorsize': 512}
21 self._total_bytes = 0 38 self._total_bytes = 0
22 self._cylinder_bytes = 0 39 self._cylinder_bytes = 0
40 self._arch = arch
23 self._parted_dev = parted.PedDevice.get(self._device) 41 self._parted_dev = parted.PedDevice.get(self._device)
24 self._parted_disk = parted.PedDisk.new(self._parted_dev) 42 self._parted_disk = parted.PedDisk.new(self._parted_dev)
25 self.set_disk_geometry_from_disk() 43 self.set_disk_geometry_from_disk()
26 44
45 ##
46 # Sets disk geometry info from disk. This function is used internally by __init__()
27 def set_disk_geometry_from_disk(self): 47 def set_disk_geometry_from_disk(self):
28 self._total_bytes = self._parted_dev.length * self._parted_dev.sector_size 48 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 49 self._geometry['heads'], self._geometry['sectors'], self._geometry['cylinders'] = self._parted_dev.heads, self._parted_dev.sectors, self._parted_dev.cylinders
50 self._sector_bytes = self._parted_dev.sector_size
39 self._cylinder_bytes = self._geometry['heads'] * self._geometry['sectors'] * self._parted_dev.sector_size 51 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'] 52 self._total_sectors = self._parted_dev.length
41 self._sectors_in_cylinder = self._geometry['heads'] * self._geometry['sectors'] 53 self._sectors_in_cylinder = self._geometry['heads'] * self._geometry['sectors']
54 self._total_mb = int(self._total_bytes / MEGABYTE)
42 55
56 ##
57 # Sets partition info from disk.
43 def set_partitions_from_disk(self): 58 def set_partitions_from_disk(self):
59 last_part = 0
60 last_log_part = 4
44 parted_part = self._parted_disk.next_partition() 61 parted_part = self._parted_disk.next_partition()
45 while parted_part != None: 62 while parted_part:
63 part_mb = int((parted_part.geom.end - parted_part.geom.start + 1) * self._sector_bytes / MEGABYTE)
46 if parted_part.num < 1: 64 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 = "" 65 fs_type = ""
64 if parted_part.fs_type != None: fs_type = parted_part.fs_type.name 66 if parted_part.fs_type != None: fs_type = parted_part.fs_type.name
65 if parted_part.type == 2: fs_type = "extended" 67 if parted_part.type == 2: fs_type = "extended"
68 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 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 self._partitions[Decimal(str(float(last_log_part+0.9)))] = Partition(self, Decimal(str(float(last_log_part+0.9))), part_mb, parted_part.geom.start, parted_part.geom.end, "free", format=False, existing=False)
77 last_log_part += 1
78 else:
79 self._partitions[Decimal(str(float(last_part+0.1)))] = Partition(self, Decimal(str(float(last_part+0.1))), part_mb, parted_part.geom.start, parted_part.geom.end, "free", format=False, existing=False)
80 last_part += 1
81 parted_part = self._parted_disk.next_partition(parted_part)
82
83 ##
84 # 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 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"
66 if int(tmppart['start']) == int(start) and int(tmppart['end']) == int(end) and tmppart['type'] == fs_type and tmppart['format'] == False: 98# if int(tmppart['start']) == int(start) and int(tmppart['end']) == int(end) and tmppart['type'] == fs_type and tmppart['format'] == False:
67 existing = True 99# 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'])) 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']))
69 101
102 ##
103 # Returns name of device (e.g. /dev/hda) being represented
70 def get_device(self): 104 def get_device(self):
71 return self._device 105 return self._device
72 106
107 ##
108 # Combines free space and closes gaps in minor numbers. This is used internally
73 def clear_partitions(self): 109 def tidy_partitions(self):
74 self._partitions = {} 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 if archinfo[self._arch]['extended'] and part > 4: break
118 tmppart = self._partitions[part]
119 if tmppart.get_type() == "extended":
120 for part_log in parts:
121 if part_log < Decimal("4.9"): continue
122 tmppart_log = self._partitions[part_log]
123 if tmppart_log.get_type() == "free":
124 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 else:
128 if not last_log_free:
129 last_log_free = Decimal(str(last_log_minor + 0.9))
130 tmppart_log.set_minor(last_log_free)
131 self._partitions[last_log_free] = tmppart_log
132 if part_log != last_log_free: del self._partitions[part_log]
133 continue
134 last_log_free = part_log
135 else:
136 if part_log > (last_log_minor + 1):
137 tmppart_log.set_minor(last_log_minor + 1)
138 last_log_minor = last_log_minor + 1
139 self._partitions[last_log_minor] = tmppart_log
140 del self._partitions[part_log]
141 continue
142 last_log_minor = part_log
143 if tmppart.get_type() == "free":
144 if last_minor < last_free:
145 self._partitions[last_free].set_mb(self._partitions[last_free].get_mb()+tmppart.get_mb())
146 del self._partitions[part]
147 else:
148 if not last_free:
149 last_free = Decimal(str(last_minor + 0.1))
150 tmppart.set_minor(last_free)
151 self._partitions[last_free] = tmppart
152 if part != last_free: del self._partitions[part]
153 continue
154 last_free = part
155 else:
156 if part > (last_minor + 1):
157 tmppart.set_minor(last_minor + 1)
158 last_minor = last_minor + 1
159 self._partitions[last_minor] = tmppart
160 del self._partitions[part]
161 continue
162 last_minor = part
75 163
76 def add_partition(self, minor, start, end, type): 164 ##
77 free_start, free_end = self.get_free_space(start) 165 # Adds a new partition to the partition info
166 # @param free_minor minor of unallocated space partition is being created in
167 # @param mb size of partition in MB
168 # @param start Start sector (only used for existing partitions)
169 # @param end End sector (only used for existing partitions)
170 # @param type Partition type (ext2, ext3, fat32, linux-swap, free, extended, etc.)
171 # @param mountpoint='' Partition mountpoint
172 # @param mountopts='' Partition mount options
173 def add_partition(self, free_minor, mb, start, end, type, mountpoint='', mountopts=''):
174 free_minor = Decimal(str(free_minor))
78 minor = int(minor) 175 new_minor = int(free_minor) + 1
79 if not free_end: 176# print "add_partition(): free_minor=" + str(free_minor) + ", new_minor=" + str(new_minor)
80 return False
81 if self._partitions.has_key(minor): 177 if self._partitions.has_key(new_minor):
82 parts = self._partitions.keys() 178 parts = self._partitions.keys()
83 parts.sort() 179 parts.sort()
84 parts.reverse() 180 parts.reverse()
85 hole_at = 0 181 hole_at = 0
86 for i in range(1, parts[0]+1): 182 for i in range(1, parts[0]+1):
87 if i <= minor: continue 183 if i <= new_minor: continue
88 if not self._partitions.has_key(int(i)): 184 if not self._partitions.has_key(i):
89 hole_at = i 185 hole_at = i
90 break 186 break
91 stopscooting = 0 187 stopscooting = 0
92 for i in parts: 188 for i in parts:
93 if stopscooting: break 189 if stopscooting: break
94 if (i >= hole_at) and (hole_at): continue 190 if i >= hole_at and hole_at: continue
95 if i >= minor: 191 if i >= new_minor:
96 self._partitions[i].set_minor(i+1) 192 self._partitions[i].set_minor(i+1)
97 self._partitions[i+1] = self._partitions[i] 193 self._partitions[i+1] = self._partitions[i]
98 if i == minor: stopscooting = 1 194 if i == new_minor: stopscooting = 1
99 self._partitions[minor] = Partition(self, minor, '', start, end, 0, type) 195 if mb != self._partitions[free_minor].get_mb():
196 old_free_mb = self._partitions[free_minor].get_mb()
197 del self._partitions[free_minor]
198 if archinfo[self._arch]['extended'] and new_minor >= 5:
199 free_minor = Decimal(str(new_minor + 0.9))
200 else:
201 free_minor = Decimal(str(new_minor + 0.1))
202 self._partitions[free_minor] = Partition(self, free_minor, old_free_mb-mb, 0, 0, "free")
203# print "add_partition(): new part doesn't use all freespace. new free part is: minor=" + str(free_minor)
204 else:
205 del self._partitions[free_minor]
206 self._partitions[new_minor] = Partition(self, new_minor, mb, start, end, type, mountpoint=mountpoint, mountopts=mountopts)
207 if type == "extended":
208 self._partitions[Decimal("4.9")] = Partition(self, Decimal("4.9"), mb, 0, 0, "free")
209 self.tidy_partitions()
100 210
211 ##
212 # Removes partition from partition info
213 # @param minor Minor of partition to remove
101 def remove_partition(self, minor): 214 def remove_partition(self, minor):
215 tmppart = self._partitions[int(minor)]
216 free_minor = 0
217 if tmppart.is_logical():
218 free_minor = Decimal(str(float(minor)-0.1))
219 else:
220 free_minor = Decimal(str(float(minor)-0.9))
221 self._partitions[free_minor] = Partition(self, free_minor, tmppart.get_mb(), 0, 0, "free", format=False, existing=False)
102 del self._partitions[int(minor)] 222 del self._partitions[int(minor)]
223 self.tidy_partitions()
103 224
225 ##
226 # Returns free space (no longer used)
227 # @param start Start sector for search
104 def get_free_space(self, start): 228 def get_free_space(self, start):
229 GAP_SIZE = 100
105 parts = self._partitions.keys() 230 parts = self._partitions.keys()
106 parts.sort() 231 parts.sort()
107 lastend_pri = 0 232 lastend_pri = 0
108 lastend_log = 0 233 lastend_log = 0
109 free_start = -1 234 free_start = -1
110 free_end = -1 235 free_end = -1
111 if start > self.get_num_cylinders(): return (-1, -1) 236 if start > self._total_sectors: return (-1, -1)
112 for part in parts: 237 for part in parts:
113 if part > 4: break 238 if part > 4: break
114 tmppart = self._partitions[part] 239 tmppart = self._partitions[part]
115 if (tmppart.get_start() > lastend_pri) and (lastend_pri >= start): 240 if (tmppart.get_start() > (lastend_pri + GAP_SIZE)) and (lastend_pri >= start):
116 free_start = lastend_pri 241 free_start = lastend_pri
117 free_end = tmppart.get_start() - 1 242 free_end = tmppart.get_start() - 1
118 break 243 break
119 if tmppart.is_extended() and start < tmppart.get_end(): 244 if tmppart.is_extended() and start < tmppart.get_end():
120 lastend_log = tmppart.get_start() 245 lastend_log = tmppart.get_start()
121 for part_log in parts: 246 for part_log in parts:
122 if part_log < 5: continue 247 if part_log < 5: continue
123 tmppart_log = self._partitions[part_log] 248 tmppart_log = self._partitions[part_log]
124 if (tmppart_log.get_start() > lastend_log) and (lastend_log >= start): 249 if (tmppart_log.get_start() > (lastend_log + GAP_SIZE)) and (lastend_log >= start):
125 free_start = lastend_log 250 free_start = lastend_log
126 free_end = tmppart_log.get_start() - 1 251 free_end = tmppart_log.get_start() - 1
127 break 252 break
128 lastend_log = tmppart_log.get_end() + 1 253 lastend_log = tmppart_log.get_end() + 1
129 if free_start == -1 and lastend_log < tmppart.get_end(): 254 if free_start == -1 and lastend_log < tmppart.get_end():
130 free_start = lastend_log 255 free_start = lastend_log
131 free_end = tmppart.get_end() 256 free_end = tmppart.get_end()
132 break 257 break
133 lastend_pri = tmppart.get_end() + 1 258 lastend_pri = tmppart.get_end() + 1
134 if free_start == -1 and lastend_pri < self.get_num_cylinders(): 259 if free_start == -1 and lastend_pri < self._total_sectors:
135 free_start = lastend_pri 260 free_start = lastend_pri
136 free_end = self.get_num_cylinders() 261 free_end = self._total_sectors
137 return (free_start, free_end) 262 return (free_start, free_end)
138 263
264 ##
265 # Gets partition containing a certain sector (no longer used)
266 # @param sector Sector to look at
267 # @param ignore_extended=1 Ignore extended partitions
139 def get_partition_at(self, cylinder, ignore_extended=1): 268 def get_partition_at(self, sector, ignore_extended=1):
140 parts = self._partitions.keys() 269 parts = self._partitions.keys()
141 parts.sort() 270 parts.sort()
142 for part in parts: 271 for part in parts:
143 tmppart = self._partitions[part] 272 tmppart = self._partitions[part]
144 if ignore_extended and tmppart.is_extended(): continue 273 if ignore_extended and tmppart.is_extended(): continue
145 if (cylinder >= tmppart.get_start()) and (cylinder <= tmppart.get_end()): 274 if (sector >= tmppart.get_start()) and (sector <= tmppart.get_end()):
146 return part 275 return part
147 return 0 276 return 0
148 277
278 ##
279 # Returns free minor (no longer used)
280 # @param start Parameter description
281 # @param end Parameter description
149 def get_free_minor_at(self, start, end): 282 def get_free_minor_at(self, start, end):
150 parts = self._partitions.keys() 283 parts = self._partitions.keys()
151 parts.sort() 284 parts.sort()
152 minor = 1 285 minor = 1
153 lastpart = 0 286 lastpart = 0
173 break 306 break
174 minor = part + 1 307 minor = part + 1
175 lastpart = part 308 lastpart = part
176 return minor 309 return minor
177 310
311 ##
312 # Returns an ordered list (disk order) of partition minors
178 def get_ordered_partition_list(self): 313 def get_ordered_partition_list(self):
179 parts = self._partitions.keys() 314 parts = self._partitions.keys()
180 parts.sort() 315 parts.sort()
181 partlist = [] 316 partlist = []
182 free_start, free_end = self.get_free_space(0) 317 tmppart = None
183 tmppart = None
184 tmppart_log = None 318 tmppart_log = None
185 for part in parts: 319 for part in parts:
186 if part > 4: break 320 if archinfo[self._arch]['extended'] and part > Decimal("4.1"): break
187 tmppart = self._partitions[part] 321 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) 322 partlist.append(part)
194 if tmppart.is_extended(): 323 if tmppart.is_extended():
195 for part_log in parts: 324 for part_log in parts:
196 if part_log < 5: continue 325 if part_log < Decimal("4.9"): continue
197 tmppart_log = self._partitions[part_log] 326 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) 327 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 328 return partlist
209 329
330 ##
331 # Returns partition info in a format suitable for passing to install_profile.set_partition_tables()
210 def get_install_profile_structure(self): 332 def get_install_profile_structure(self):
211 devdic = {} 333 devdic = {}
212 for part in self._partitions: 334 for part in self._partitions:
213 tmppart = self._partitions[part] 335 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() } 336 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 337 return devdic
216 338
339 ##
340 # Returns the minor of the extended partition, if any
341 def get_extended_partition(self):
342 for part in self._partitions:
343 tmppart = self._partitions[part]
344 if tmppart.is_extended():
345 return part
346 return 0
347
348 ##
349 # Returns the number of sectors on the device
217 def get_num_sectors(self): 350 def get_num_sectors(self):
218 return int(self._total_sectors) 351 return int(self._total_sectors)
219 352
353 ##
354 # Returns the size of a cylinder in bytes
220 def get_cylinder_size(self): 355 def get_cylinder_size(self):
221 return int(self._cylinder_bytes) 356 return int(self._cylinder_bytes)
222 357
358 ##
359 # Returns the size of a sector in bytes
360 def get_sector_size(self):
361 return int(self._sector_bytes)
362
363 ##
364 # Returns the number of cylinders
223 def get_num_cylinders(self): 365 def get_num_cylinders(self):
224 return int(self._geometry['cylinders']) 366 return int(self._geometry['cylinders'])
225 367
368 ##
369 # Returns the total number of bytes on the device
226 def get_drive_bytes(self): 370 def get_drive_bytes(self):
227 return int(self._total_bytes) 371 return int(self._total_bytes)
228 372
373 ##
374 # Returns the total number of MB on the device
375 def get_total_mb(self):
376 return self._total_mb
377
378 ##
379 # Returns partition info dictionary
229 def get_partitions(self): 380 def get_partitions(self):
230 return self._partitions 381 return self._partitions
231 382
232 def print_partitions(self): 383 ##
233 for part in self._partitions.keys(): 384 # Prints disk geometry to STDOUT (no longer used)
234 print self._partitions[part].return_info()
235
236 def print_geometry(self): 385 def print_geometry(self):
237 print self._total_bytes, self._geometry 386 print self._total_bytes, self._geometry
238 387
388 ##
389 # Utility function for raising an exception
390 # @param message Error message
239 def _error(self, message): 391 def _error(self, message):
240 "Raises an exception" 392 "Raises an exception"
241 raise "DeviceObjectError", message 393 raise "DeviceObjectError", message
242 394
395 ##
396 # Utility function for running a command and returning it's output as a list
397 # @param cmd Command to run
243 def _run(self, cmd): 398 def _run(self, cmd):
244 "Runs a command and returns the output" 399 "Runs a command and returns the output"
245 400
246 # Run command 401 # Run command
247 output_string = commands.getoutput(cmd) 402 output_string = commands.getoutput(cmd)
261 output_string = output_string[index:] 416 output_string = output_string[index:]
262 417
263 # return output 418 # return output
264 return output_list 419 return output_list
265 420
266 421##
422# This class represents a partition within a GLIStorageDevice object
267class Partition: 423class Partition:
268 "Class representing a single partition within a Device object" 424 "Class representing a single partition within a Device object"
269 425
270 _device = None 426 _device = None
271 _minor = None 427 _minor = 0
272 _bootflag = None 428 _orig_minor = 0
273 _start = None 429 _start = 0
274 _end = None 430 _end = 0
275 _blocks = None
276 _type = None 431 _type = None
277 _mountpoint = None 432 _mountpoint = None
278 _mountopts = None 433 _mountopts = None
279 _format = None 434 _format = None
280 _resizeable = None 435 _resizeable = None
281 _min_cylinders_for_resize = 0 436 _min_mb_for_resize = 0
437 _mb = 0
282 438
439 ##
440 # Initialization function for the Partition class
441 # @param device Parent GLIStorageDevice object
442 # @param minor Minor of partition
443 # @param mb Parameter Size of partition in MB
444 # @param start Parameter Start sector of partition
445 # @param end Parameter Start sector of partition
446 # @param type Parameter Type of partition (ext2, ext3, fat32, linux-swap, free, extended, etc.)
447 # @param mountpoint='' Mountpoint of partition
448 # @param mountopts='' Mount options of partition
449 # @param format=True Format partition
450 # @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): 451 def __init__(self, device, minor, mb, start, end, type, mountpoint='', mountopts='', format=True, existing=False):
284 self._device = device 452 self._device = device
285 self._minor = int(minor) 453 self._minor = float(minor)
286 self._bootflag = bootflag 454 if existing: self._orig_minor = int(minor)
287 self._start = int(start) 455 self._start = int(start)
288 self._end = int(end) 456 self._end = int(end)
289 self._blocks = int(blocks) 457 self._type = type or "unknown"
290 self._type = type
291 self._mountpoint = mountpoint 458 self._mountpoint = mountpoint
292 self._mountopts = mountopts 459 self._mountopts = mountopts
293 self._format = format 460 self._format = format
294 if blocks == 0: 461 self._mb = mb
295 self._blocks = ((self._end - self._start) * self._device.get_cylinder_size()) / 512
296 if existing: 462 if existing:
463 self._orig_minor = self._minor
297 parted_part = device._parted_disk.get_partition(minor) 464 parted_part = device._parted_disk.get_partition(minor)
465 label_type = device._parted_disk.type.name
466 if label_type == "loop":
467 dev_node = device._device
468 else:
469 dev_node = device._device + str(minor)
298 if type == "ntfs": 470 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 .\+//'")) 471 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) + 1 472 self._min_mb_for_resize = int(min_bytes / MEGABYTE) + 1
301 self._resizeable == True 473 self._resizeable == True
302 elif type == "ext2" or type == "ext3": 474 elif type == "ext2" or type == "ext3":
303 commands.system("mkdir /mnt/freespace; mount " + device._device + str(minor) + " /mnt/freespace") 475 block_size = 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 476 free_blocks = 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") 477 free_bytes = int(block_size * free_blocks)
306 min_bytes = min_bytes + (100 * 1024 * 1024) # Add 100M just to be safe 478 # 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) + 1 479 self._min_mb_for_resize = self._mb - int(free_bytes / MEGABYTE) + 50
308 self._resizeable == True 480 self._resizeable == True
309 elif type == "fat16" or type == "fat32": 481 else:
310 parted_part = self._device._parted_disk.get_partition(self._minor) 482 parted_part = self._device._parted_disk.get_partition(int(self._minor))
483 try:
311 parted_fs = parted_part.geom.file_system_open() 484 parted_fs = parted_part.geom.file_system_open()
485 except:
486 self._resizeable = False
487 return
312 resize_constraint = parted_fs.get_resize_constraint() 488 resize_constraint = parted_fs.get_resize_constraint()
313 min_size = float(resize_constraint.min_size / self._device._sectors_in_cylinder) 489 min_bytes = resize_constraint.min_size * self._device._sector_bytes
314 if int(min_size) != min_size: min_size = int(min_size) + 1 490 self._min_mb_for_resize = int(min_bytes / MEGABYTE) + 1
315 self._min_cylinders_for_resize = min_size
316 self._resizeable = True 491 self._resizeable = True
317 elif type == "":
318 self._min_cylinders_for_resize = 1
319 self._resizeable = True
320 else:
321 self._resizeable = True
322 492
493 ##
494 # Returns whether or not the partition is extended
323 def is_extended(self): 495 def is_extended(self):
324 if self._type == "extended": 496 if self._type == "extended":
325 return True 497 return True
326 else: 498 else:
327 return False 499 return False
328 500
501 ##
502 # Returns whether or not the partition is logical
329 def is_logical(self): 503 def is_logical(self):
330 part = self._device.get_partition_at(self._start, ignore_extended=0) 504 if self._type == "free":
331 if part and self._device._partitions[part].is_extended() and not part == self._minor: 505 if int(self._minor) + Decimal("0.9") == Decimal(str(self._minor)):
506 return True
507 else:
508 return False
509 elif archinfo[self._device._arch]['extended'] and self._minor > 4:
332 return True 510 return True
511 else:
333 return False 512 return False
334 513
514 ##
515 # Returns a list of logical partitions if this is an extended partition
335 def get_logicals(self): 516 def get_logicals(self):
517 if not self.is_extended():
518 return None
336 logicals = [] 519 logicals = []
337 start = self._start 520 start = self._start
338 while not start > self._end:
339 part = self._device.get_partition_at(start) 521 parts = self._device._partitions.keys()
340 if not part: break 522 parts.sort()
523 for part in parts:
524 if part < 5: continue
341 logicals.append(part) 525 logicals.append(part)
342 start = self._device._partitions[part].get_end() + 1
343 logicals.sort() 526 logicals.sort()
344 return logicals 527 return logicals
345 528
529 ##
530 # Returns the extened parent partition if this is a logical partition (no longer used)
346 def get_extended_parent(self): 531 def get_extended_parent(self):
532 if not self.is_logical():
533 return None
534 else:
347 return self._device.get_partition_at(self._start, ignore_extended=0) 535 return self._device.get_partition_at(self._start, ignore_extended=0)
348 536
537 ##
538 # Sets the start sector for the partition
539 # @param start Start sector
349 def set_start(self, start): 540 def set_start(self, start):
350 self._start = int(start) 541 self._start = int(start)
351 self._blocks = ((self._end - self._start) * self._device.get_cylinder_size()) / 512
352 542
543 ##
544 # Returns the start sector for the partition
353 def get_start(self): 545 def get_start(self):
354 return int(self._start) 546 return int(self._start)
355 547
548 ##
549 # Sets the end sector of the partition
550 # @param end End sector
356 def set_end(self, end): 551 def set_end(self, end):
357 self._end = int(end) 552 self._end = int(end)
358 self._blocks = ((self._end - self._start) * self._device.get_cylinder_size()) / 512
359 553
554 ##
555 # Returns end sector for the partition
360 def get_end(self): 556 def get_end(self):
361 return int(self._end) 557 return int(self._end)
362 558
559 ##
560 # Returns size of partition in MB
561 def get_mb(self):
562 return int(self._mb)
563
564 ##
565 # Sets size of partition in MB
566 # @param mb Parameter description
567 def set_mb(self, mb):
568 self._mb = int(mb)
569
570 ##
571 # Sets type of partition
572 # @param type Parameter description
363 def set_type(self, type): 573 def set_type(self, type):
364 self._type = type 574 self._type = type
365 575
576 ##
577 # Returns type of partition
366 def get_type(self): 578 def get_type(self):
367 return self._type 579 return self._type
368 580
581 ##
582 # Returns parent GLIStorageDevice object
369 def get_device(self): 583 def get_device(self):
370 return self._device 584 return self._device
371 585
586 ##
587 # Sets minor of partition
588 # @param minor New minor
372 def set_minor(self, minor): 589 def set_minor(self, minor):
373 self._minor = int(minor) 590 self._minor = float(minor)
374 591
592 ##
593 # Returns minor of partition
375 def get_minor(self): 594 def get_minor(self):
376 return int(self._minor) 595 return float(self._minor)
377 596
597 ##
598 # Sets the original minor of the partition
599 # @param orig_minor Parameter description
600 def set_orig_minor(self, orig_minor):
601 self._orig_minor = int(orig_minor)
602
603 ##
604 # Returns the original minor of the partition
605 def get_orig_minor(self):
606 return self._orig_minor
607
608 ##
609 # Sets the mountpoint for the partition
610 # @param mountpoint Mountpoint
378 def set_mountpoint(self, mountpoint): 611 def set_mountpoint(self, mountpoint):
379 self._mountpoint = mountpoint 612 self._mountpoint = mountpoint
380 613
614 ##
615 # Returns the mountpoint for the partition
381 def get_mountpoint(self): 616 def get_mountpoint(self):
382 return self._mountpoint 617 return self._mountpoint
383 618
619 ##
620 # Sets the mount options for the partition
621 # @param mountopts Mount options
384 def set_mountopts(self, mountopts): 622 def set_mountopts(self, mountopts):
385 self._mountopts = mountopts 623 self._mountopts = mountopts
386 624
625 ##
626 # Returns the mount options for the partition
387 def get_mountopts(self): 627 def get_mountopts(self):
388 return self._mountopts 628 return self._mountopts
389 629
630 ##
631 # Set whether to format the partition
632 # @param format Format this partition (True/False)
390 def set_format(self, format): 633 def set_format(self, format):
391 self._format = format 634 self._format = format
392 635
636 ##
637 # Returns whether to format the partition
393 def get_format(self): 638 def get_format(self):
394 return self._format 639 return self._format
395 640
396 def get_blocks(self): 641 ##
397 return int(self._blocks) 642 # Returns whether the partition is resizeable
643 def is_resizeable(self):
644 return self._resizeable
398 645
646 ##
647 # Returns minimum MB for resize
399 def get_min_cylinders_for_resize(self): 648 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(): 649# if self.is_extended():
410 min_size = self._start 650# min_size = self._start
411 for part in self._device._partitions: 651# for part in self._device._partitions:
412 if part < 5: continue 652# if part < 5: continue
413 min_size = part.get_end() 653# if part.get_end > min_size: min_size = part.get_end()
654# return min_size
655# else:
656 if self._resizeable:
657 return self._min_mb_for_resize
414 else: 658 else:
415 return self._min_cylinders_for_resize 659 return -1
416 660
661 ##
662 # Returns maximum MB for resize
417 def get_max_cylinders_for_resize(self): 663 def get_max_mb_for_resize(self):
418 free_start, free_end = self._device.get_free_space(self._end) 664 free_minor = 0
419 if free_end == -1: return self._end
420 if free_start - 1 == self._end:
421 if self.is_logical(): 665 if self.is_logical():
422 if free_end <= self._device._partitions[self.get_extended_parent()]._end: 666 free_minor = Decimal(str(self._minor + 0.9))
423 return free_end
424 else:
425 return self._end
426 else: 667 else:
427 return free_end 668 free_minor = Decimal(str(self._minor + 0.1))
669 if free_minor in self._device._partitions:
670 return self._mb + self._device._partitions[free_minor]._mb
671 else:
672 return self._mb
428 673
674 ##
675 # Resizes the partition (ignore)
676 # @param start New start sector
677 # @param end New end sector
429 def resize(self, start, end): 678 def resize(self, start, end):
430 part_at_start = self._device.get_partition_at(int(start)) 679 part_at_start = self._device.get_partition_at(int(start))
431 part_at_end = self._device.get_partition_at(int(end)) 680 part_at_end = self._device.get_partition_at(int(end))
432 logicals = None 681 logicals = None
433 if self.is_logical(): 682 if self.is_logical():
447 return 0 696 return 0
448 self.set_start(start) 697 self.set_start(start)
449 self.set_end(end) 698 self.set_end(end)
450 return 1 699 return 1
451 700
701 ##
702 # Utility function to raise an exception
703 # @param message Error message
452 def _error(self, message): 704 def _error(self, message):
453 "Raises an exception"
454 raise "PartitionObjectError", message 705 raise "PartitionObjectError", message
455
456 706
707##
708# Returns a list of detected partitionable devices
457def detect_devices(): 709def detect_devices():
458 "Returns a list of partitionable devices on the system"
459
460 devices = [] 710 devices = []
461 711
462 # Make sure sysfs exists 712 # Make sure sysfs exists
463 if not os.path.exists("/sys/bus"): 713 if not os.path.exists("/sys/bus"):
464 raise Exception, "no sysfs found (you MUST use a kernel >2.6)" 714 raise Exception, "no sysfs found (you MUST use a kernel >2.6)"

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