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

Diff of /trunk/src/GLIStorageDevice.py

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

Revision 386 Revision 924
1# Copyright 1999-2005 Gentoo Foundation
2# This source code is distributed under the terms of version 2 of the GNU
3# General Public License as published by the Free Software Foundation, a copy
4# of which can be found in the main directory of this project.
5
1import commands, string, re, os, parted 6import commands, string, os, parted
7from GLIException import *
8import GLIUtility
2 9
10MEGABYTE = 1024 * 1024
11
12# these are here so that we can change them easily in future
13# the values were chosen to represent perfect floating point representations
14FREE_MINOR_FRAC_PRI = 1.0/32.0
15FREE_MINOR_FRAC_LOG = 1.0/8.0
16
17archinfo = { 'sparc': { 'fixedparts': [ { 'minor': 3, 'type': "wholedisk" } ], 'disklabel': 'sun', 'extended': False },
18 'hppa': { 'fixedparts': [ { 'minor': 1, 'type': "palo" } ], 'disklabel': 'msdos', 'extended': True },
19 'x86': { 'fixedparts': [], 'disklabel': 'msdos', 'extended': True },
20 'amd64': { 'fixedparts': [], 'disklabel': 'msdos', 'extended': True },
21 'ppc': { 'fixedparts': [ { 'minor': 1, 'type': "metadata" } ], 'disklabel': 'mac', 'extended': False }
22 }
23
24##
25# This class provides a partitioning abstraction for the frontends
3class Device: 26class Device:
4 "Class representing a partitionable device." 27 "Class representing a partitionable device."
5 28
6 _device = None 29 _device = None
7 _partitions = None 30 _partitions = None
11 _cylinder_bytes = 0 34 _cylinder_bytes = 0
12 _sectors_in_cylinder = 0 35 _sectors_in_cylinder = 0
13 _parted_dev = None 36 _parted_dev = None
14 _parted_disk = None 37 _parted_disk = None
15 _sector_bytes = 0 38 _sector_bytes = 0
16 39 _total_mb = 0
17 def __init__(self, device): 40 _arch = None
41 _disklabel = None
42
43 ##
44 # Initialization function for GLIStorageDevice class
45 # @param device Device node (e.g. /dev/hda) of device being represented
46 # @param arch="x86" Architecture that we're partition for (defaults to 'x86' for now)
47 def __init__(self, device, arch="x86", set_geometry=True, virtual=False, size_known=False):
18 self._device = device 48 self._device = device
19 self._partitions = {} 49 self._partitions = {}
20 self._geometry = {'cylinders': 0, 'heads': 0, 'sectors': 0, 'sectorsize': 512} 50 self._geometry = {'cylinders': 0, 'heads': 0, 'sectors': 0, 'sectorsize': 512}
21 self._total_bytes = 0 51 self._total_bytes = 0
22 self._cylinder_bytes = 0 52 self._cylinder_bytes = 0
53 self._arch = arch
23 self._parted_dev = parted.PedDevice.get(self._device) 54 self._parted_dev = parted.PedDevice.get(self._device)
55 try:
24 self._parted_disk = parted.PedDisk.new(self._parted_dev) 56 self._parted_disk = parted.PedDisk.new(self._parted_dev)
57 except:
58 self._parted_disk = self._parted_dev.disk_new_fresh(parted.disk_type_get(archinfo[self._arch]['disklabel']))
59 self._disklabel = self._parted_disk.type.name
60 if set_geometry:
25 self.set_disk_geometry_from_disk() 61 self.set_disk_geometry_from_disk()
26 62
63 ##
64 # Sets disk geometry info from disk. This function is used internally by __init__()
27 def set_disk_geometry_from_disk(self): 65 def set_disk_geometry_from_disk(self):
28 self._total_bytes = self._parted_dev.length * self._parted_dev.sector_size 66 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 67 self._geometry['heads'], self._geometry['sectors'], self._geometry['cylinders'] = self._parted_dev.heads, self._parted_dev.sectors, self._parted_dev.cylinders
39
40 self._sector_bytes = self._parted_dev.sector_size 68 self._sector_bytes = self._parted_dev.sector_size
41 self._cylinder_bytes = self._geometry['heads'] * self._geometry['sectors'] * self._sector_bytes 69 self._cylinder_bytes = self._geometry['heads'] * self._geometry['sectors'] * self._sector_bytes
42# self._total_sectors = self._geometry['cylinders'] * self._geometry['heads'] * self._geometry['sectors']
43 self._total_sectors = self._parted_dev.length 70 self._total_sectors = self._parted_dev.length
44 self._sectors_in_cylinder = self._geometry['heads'] * self._geometry['sectors'] 71 self._sectors_in_cylinder = self._geometry['heads'] * self._geometry['sectors']
72 self._total_mb = long(self._total_bytes / MEGABYTE)
45 73
74 ##
75 # Sets partition info from disk.
46 def set_partitions_from_disk(self): 76 def set_partitions_from_disk(self):
77 last_part = 0
78 last_log_part = 4
47 parted_part = self._parted_disk.next_partition() 79 parted_part = self._parted_disk.next_partition()
48 while parted_part != None: 80 while parted_part:
81 part_mb = long((parted_part.geom.end - parted_part.geom.start + 1) * self._sector_bytes / MEGABYTE)
49 if parted_part.num < 1: 82 if parted_part.num >= 1:
50 parted_part = self._parted_disk.next_partition(parted_part)
51 continue
52 fs_type = "" 83 fs_type = ""
53 if parted_part.fs_type != None: fs_type = parted_part.fs_type.name 84 if parted_part.fs_type != None: fs_type = parted_part.fs_type.name
54 if parted_part.type == 2: fs_type = "extended" 85 if parted_part.type == 2: fs_type = "extended"
86 if archinfo[self._arch]['extended'] and parted_part.num > 4:
87 last_log_part = parted_part.num
88 else:
89 last_part = parted_part.num
55 self._partitions[int(parted_part.num)] = Partition(self, parted_part.num, '', parted_part.geom.start, parted_part.geom.end, (parted_part.geom.end - parted_part.geom.start), fs_type, format=False, existing=True) 90 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)
91 elif parted_part.type_name == "free":
92# parent_part = self.get_partition_at(parted_part.geom.start, ignore_extended=0)
93# if parent_part:
94 if self.get_extended_partition() and parted_part.geom.start >= self._partitions[self.get_extended_partition()].get_start() and parted_part.geom.end <= self._partitions[self.get_extended_partition()].get_end():
95 self._partitions[last_log_part+FREE_MINOR_FRAC_LOG] = Partition(self, last_log_part+FREE_MINOR_FRAC_LOG, part_mb, parted_part.geom.start, parted_part.geom.end, "free", format=False, existing=False)
96 last_log_part += 1
97 else:
98 self._partitions[last_part+FREE_MINOR_FRAC_PRI] = Partition(self, last_part+FREE_MINOR_FRAC_PRI, part_mb, parted_part.geom.start, parted_part.geom.end, "free", format=False, existing=False)
99 last_part += 1
56 parted_part = self._parted_disk.next_partition(parted_part) 100 parted_part = self._parted_disk.next_partition(parted_part)
57 101
102 ##
103 # Imports partition info from the install profile partition structure
104 # @param ips Parameter structure returned from install_profile.get_partition_tables()
58 def set_partitions_from_install_profile_structure(self, ips): 105 def set_partitions_from_install_profile_structure(self, ips):
59 for part in ips: 106 for part in ips:
60 tmppart = ips[part] 107 tmppart = ips[part]
61 existing = False 108 existing = False
62 parted_part = self._parted_disk.get_partition(part) 109 if tmppart['origminor'] and not tmppart['format']:
63 if parted_part != None:
64 start = parted_part.geom.start / self._sectors_in_cylinder
65 end = parted_part.geom.end / self._sectors_in_cylinder
66 fs_type = ""
67 if parted_part.fs_type != None: fs_type = parted_part.fs_type.name
68 if parted_part.type == 2: fs_type = "extended"
69 if int(tmppart['start']) == int(start) and int(tmppart['end']) == int(end) and tmppart['type'] == fs_type and tmppart['format'] == False:
70 existing = True 110 existing = True
71 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'])) 111 self._partitions[tmppart['minor']] = Partition(self, tmppart['minor'], tmppart['mb'], tmppart['start'], tmppart['end'], tmppart['type'], format=tmppart['format'], origminor=tmppart['origminor'], existing=existing, mountpoint=tmppart['mountpoint'], mountopts=tmppart['mountopts'], mkfsopts=tmppart['mkfsopts'])
72 112
113 ##
114 # Returns name of device (e.g. /dev/hda) being represented
73 def get_device(self): 115 def get_device(self):
74 return self._device 116 return self._device
75 117
118 ##
119 # Uses magic to apply the recommended partition layout
120 def do_recommended(self):
121 free_minor = 0
122 recommended_parts = [ { 'type': "ext2", 'size': 100, 'mountpoint': "/boot" },
123 { 'type': "linux-swap", 'size': 512, 'mountpoint': "" },
124 { 'type': "ext3", 'size': "*", 'mountpoint': "/" } ]
125 to_create = []
126 parts = self.get_ordered_partition_list()
127 for part in parts:
128 if self._partitions[part].get_type() == "free" and self._partitions[part].get_mb() >= 4096:
129 free_minor = part
130 break
131 if not free_minor:
132 raise GLIException("RecommendedPartitionLayoutError", "notice", "do_recommended", "You do not have atleast 4GB of concurrent unallocated space. Please remove some partitions and try again.")
133 remaining_free = self._partitions[free_minor].get_mb()
134 for newpart in recommended_parts:
135 if archinfo[self._arch]['extended'] and free_minor == (3 + FREE_MINOR_FRAC_PRI) and not newpart == recommended_parts[-1]:
136 if self.get_extended_partition():
137 raise GLIException("RecommendedPartitionLayoutError", "notice", "do_recommended", "This code is not yet robust enough to handle automatic partitioning with your current layout.")
138 to_create.append({ 'type': "extended", 'size': remaining_free, 'mountpoint': "", 'free_minor': free_minor })
139 free_minor = 4 + FREE_MINOR_FRAC_LOG
140 newpart['free_minor'] = free_minor
141 to_create.append(newpart)
142 free_minor = free_minor + 1
143 if not newpart['size'] == "*":
144 remaining_free = remaining_free - newpart['size']
145 for newpart in to_create:
146 if newpart['size'] == "*":
147 newpart['size'] = self._partitions[newpart['free_minor']].get_mb()
148 self.add_partition(newpart['free_minor'], newpart['size'], 0, 0, newpart['type'], mountpoint=newpart['mountpoint'])
149
150 ##
151 # Combines free space and closes gaps in minor numbers. This is used internally
76 def clear_partitions(self): 152 def tidy_partitions(self):
77 self._partitions = {} 153 last_minor = 0
154 last_log_minor = 4
155 last_free = 0
156 last_log_free = 0
157 parts = self._partitions.keys()
158 parts.sort()
159 for part in parts:
160 if archinfo[self._arch]['extended'] and part > 4: break
161 tmppart = self._partitions[part]
162 if tmppart.get_type() == "extended":
163 for part_log in parts:
164 if part_log < (4 + FREE_MINOR_FRAC_LOG): continue
165 tmppart_log = self._partitions[part_log]
166 if tmppart_log.get_type() == "free":
167 if last_log_minor < last_log_free:
168 self._partitions[last_log_free].set_mb(self._partitions[last_log_free].get_mb()+tmppart_log.get_mb())
169 del self._partitions[part_log]
170 else:
171 if not last_log_free:
172 last_log_free = last_log_minor + FREE_MINOR_FRAC_LOG
173 else:
174 last_log_free = part_log
175 tmppart_log.set_minor(last_log_free)
176 self._partitions[last_log_free] = tmppart_log
177 if part_log != last_log_free: del self._partitions[part_log]
178 else:
179 if part_log > (last_log_minor + 1):
180 tmppart_log.set_minor(last_log_minor + 1)
181 last_log_minor = last_log_minor + 1
182 self._partitions[last_log_minor] = tmppart_log
183 del self._partitions[part_log]
184 else:
185 last_log_minor = part_log
186 elif tmppart.get_type() == "free":
187 if last_minor < last_free:
188 self._partitions[last_free].set_mb(self._partitions[last_free].get_mb()+tmppart.get_mb())
189 del self._partitions[part]
190 else:
191 if not last_free:
192 last_free = last_minor + FREE_MINOR_FRAC_PRI
193 else:
194 last_free = part
195 tmppart.set_minor(last_free)
196 self._partitions[last_free] = tmppart
197 if part != last_free: del self._partitions[part]
198 else:
199 if part > (last_minor + 1):
200 tmppart.set_minor(last_minor + 1)
201 last_minor = last_minor + 1
202 self._partitions[last_minor] = tmppart
203 del self._partitions[part]
204 else:
205 last_minor = part
78 206
207 ##
208 # Adds a new partition to the partition info
209 # @param free_minor minor of unallocated space partition is being created in
210 # @param mb size of partition in MB
211 # @param start Start sector (only used for existing partitions)
212 # @param end End sector (only used for existing partitions)
213 # @param type Partition type (ext2, ext3, fat32, linux-swap, free, extended, etc.)
214 # @param mountpoint='' Partition mountpoint
215 # @param mountopts='' Partition mount options
216 # @param mkfsopts='' Additional mkfs options
79 def add_partition(self, minor, start, end, type, mountpoint='', mountopts=''): 217 def add_partition(self, free_minor, mb, start, end, type, mountpoint='', mountopts='',mkfsopts=''):
80 free_start, free_end = self.get_free_space(start)
81 minor = int(minor) 218 new_minor = int(free_minor) + 1
82 if not free_end:
83 return False
84 if self._partitions.has_key(minor): 219 if self._partitions.has_key(new_minor):
85 parts = self._partitions.keys() 220 parts = self._partitions.keys()
86 parts.sort() 221 parts.sort()
87 parts.reverse() 222 parts.reverse()
88 hole_at = 0 223 hole_at = 0
89 for i in range(1, parts[0]+1): 224 for i in range(1, parts[0]+1):
90 if i <= minor: continue 225 if i <= new_minor: continue
91 if not self._partitions.has_key(int(i)): 226 if not self._partitions.has_key(i):
92 hole_at = i 227 hole_at = i
93 break 228 break
94 stopscooting = 0 229 stopscooting = 0
95 for i in parts: 230 for i in parts:
96 if stopscooting: break 231 if stopscooting: break
97 if (i >= hole_at) and (hole_at): continue 232 if i >= hole_at and hole_at: continue
98 if i >= minor: 233 if i >= new_minor:
99 self._partitions[i].set_minor(i+1) 234 self._partitions[i].set_minor(i+1)
100 self._partitions[i+1] = self._partitions[i] 235 self._partitions[i+1] = self._partitions[i]
101 if i == minor: stopscooting = 1 236 if i == new_minor: stopscooting = 1
237 if mb != self._partitions[free_minor].get_mb():
238 old_free_mb = self._partitions[free_minor].get_mb()
239 del self._partitions[free_minor]
240 if archinfo[self._arch]['extended'] and new_minor >= 5:
241 free_minor = new_minor + FREE_MINOR_FRAC_LOG
242 else:
243 free_minor = new_minor + FREE_MINOR_FRAC_PRI
244 self._partitions[free_minor] = Partition(self, free_minor, old_free_mb-mb, 0, 0, "free")
245 else:
246 del self._partitions[free_minor]
102 self._partitions[minor] = Partition(self, minor, '', start, end, 0, type, mountpoint=mountpoint, mountopts=mountopts) 247 self._partitions[new_minor] = Partition(self, new_minor, mb, start, end, type, mountpoint=mountpoint, mountopts=mountopts,mkfsopts=mkfsopts)
248 if type == "extended":
249 self._partitions[4 + FREE_MINOR_FRAC_LOG] = Partition(self, (4 + FREE_MINOR_FRAC_LOG), mb, 0, 0, "free")
250 self.tidy_partitions()
103 251
252 ##
253 # Removes partition from partition info
254 # @param minor Minor of partition to remove
104 def remove_partition(self, minor): 255 def remove_partition(self, minor):
256 tmppart = self._partitions[int(minor)]
257 free_minor = 0
258 if tmppart.is_logical():
259 free_minor = int(minor-1)+FREE_MINOR_FRAC_LOG
260 else:
261 free_minor = int(minor-1)+FREE_MINOR_FRAC_PRI
262 if free_minor in self._partitions:
263 self._partitions[free_minor].set_mb(self._partitions[free_minor].get_mb() + tmppart.get_mb())
264 else:
265 self._partitions[free_minor] = Partition(self, free_minor, tmppart.get_mb(), 0, 0, "free", format=False, existing=False)
105 del self._partitions[int(minor)] 266 del self._partitions[int(minor)]
267 self.tidy_partitions()
106 268
107 def get_free_space(self, start): 269 ##
108 GAP_SIZE = 100 270 # This function clears the partition table
271 def clear_partitions(self):
272# parts = self._partitions.keys()
273# parts.sort()
274# parts.reverse()
275# for part in parts:
276# if not self._partitions[part].get_type() == "free":
277# self.remove_partition(part)
278 self._partitions = { (0 + FREE_MINOR_FRAC_PRI): Partition(self, (0 + FREE_MINOR_FRAC_PRI), self.get_total_mb(), 0, 0, "free", format=False, existing=False) }
279
280 ##
281 # Returns an ordered list (disk order) of partition minors
282 def get_ordered_partition_list(self):
109 parts = self._partitions.keys() 283 parts = self._partitions.keys()
110 parts.sort() 284 parts.sort()
111 lastend_pri = 0 285 partlist = []
112 lastend_log = 0 286 tmppart = None
113 free_start = -1
114 free_end = -1
115 if start > self._total_sectors: return (-1, -1)
116 for part in parts: 287 for part in parts:
117 if part > 4: break 288 if archinfo[self._arch]['extended'] and part > (4 + FREE_MINOR_FRAC_PRI): break
118 tmppart = self._partitions[part] 289 tmppart = self._partitions[part]
119 if (tmppart.get_start() > (lastend_pri + GAP_SIZE)) and (lastend_pri >= start):
120 free_start = lastend_pri
121 free_end = tmppart.get_start() - 1
122 break
123 if tmppart.is_extended() and start < tmppart.get_end():
124 lastend_log = tmppart.get_start()
125 for part_log in parts:
126 if part_log < 5: continue
127 tmppart_log = self._partitions[part_log]
128 if (tmppart_log.get_start() > (lastend_log + GAP_SIZE)) and (lastend_log >= start):
129 free_start = lastend_log
130 free_end = tmppart_log.get_start() - 1
131 break
132 lastend_log = tmppart_log.get_end() + 1
133 if free_start == -1 and lastend_log < tmppart.get_end():
134 free_start = lastend_log
135 free_end = tmppart.get_end()
136 break
137 lastend_pri = tmppart.get_end() + 1
138 if free_start == -1 and lastend_pri < self._total_sectors:
139 free_start = lastend_pri
140 free_end = self._total_sectors
141 return (free_start, free_end)
142
143 def get_partition_at(self, sector, ignore_extended=1):
144 parts = self._partitions.keys()
145 parts.sort()
146 for part in parts:
147 tmppart = self._partitions[part]
148 if ignore_extended and tmppart.is_extended(): continue
149 if (sector >= tmppart.get_start()) and (sector <= tmppart.get_end()):
150 return part
151 return 0
152
153 def get_free_minor_at(self, start, end):
154 parts = self._partitions.keys()
155 parts.sort()
156 minor = 1
157 lastpart = 0
158 for part in parts:
159 if part > 4: break
160 tmppart = self._partitions[part]
161 if end < tmppart.get_start():
162 minor = part
163 if (minor - 1) > lastpart: minor = lastpart + 1
164 break
165 if tmppart.is_extended() and start < tmppart.get_end():
166 minor = 5
167 lastpart = 4
168 for part_log in parts:
169 if part_log < 5: continue
170 tmppart_log = self._partitions[part_log]
171 if end < tmppart_log.get_start():
172 minor = part_log
173 if (minor - 1) > lastpart: minor = lastpart + 1
174 break
175 minor = part_log + 1
176 lastpart = part_log
177 break
178 minor = part + 1
179 lastpart = part
180 return minor
181
182 def get_ordered_partition_list(self):
183 parts = self._partitions.keys()
184 parts.sort()
185 partlist = []
186 free_start, free_end = self.get_free_space(0)
187 tmppart = None
188 tmppart_log = None
189 for part in parts:
190 if part > 4: break
191 tmppart = self._partitions[part]
192 if free_end < tmppart.get_start() and not free_start == -1:
193 partlist.append("Free Space (" + str(free_start) + "-" + str(free_end) + ")")
194 free_start, free_end = self.get_free_space(free_end)
195 newitem = self._device + str(part) + ": " + str(tmppart.get_start()) + "-" + str(tmppart.get_end())
196 if tmppart.is_extended(): newitem = newitem + " extended"
197 partlist.append(newitem) 290 partlist.append(part)
198 if tmppart.is_extended(): 291 if tmppart.is_extended():
199 for part_log in parts: 292 for part_log in parts:
200 if part_log < 5: continue 293 if part_log < (4 + FREE_MINOR_FRAC_LOG): continue
201 tmppart_log = self._partitions[part_log]
202 if free_end < tmppart_log.get_start() and free_end <= tmppart.get_end() and not free_start == -1:
203 partlist.append("Free Space (" + str(free_start) + "-" + str(free_end) + ")")
204 free_start, free_end = self.get_free_space(free_end)
205 newitem = self._device + str(part_log) + ": " + str(tmppart_log.get_start()) + "-" + str(tmppart_log.get_end()) + " logical"
206 partlist.append(newitem) 294 partlist.append(part_log)
207 if ((tmppart_log == None) or (free_start > tmppart_log.get_end())) and free_start < tmppart.get_end():
208 partlist.append("Free Space (" + str(free_start) + "-" + str(free_end) + ") logical")
209 free_start, free_end = self.get_free_space(free_end)
210 if (tmppart == None) or (free_start > tmppart.get_end()):
211 partlist.append("Free Space (" + str(free_start) + "-" + str(free_end) + ")")
212 return partlist 295 return partlist
213 296
297 ##
298 # Returns partition info in a format suitable for passing to install_profile.set_partition_tables()
214 def get_install_profile_structure(self): 299 def get_install_profile_structure(self):
215 devdic = {} 300 devdic = {}
216 for part in self._partitions: 301 for part in self._partitions:
217 tmppart = self._partitions[part] 302 tmppart = self._partitions[part]
218 devdic[part] = { 'mb': 0, 'minor': int(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() } 303 devdic[part] = { 'mb': tmppart.get_mb(), 'minor': float(part), 'origminor': tmppart.get_orig_minor(), 'type': tmppart.get_type(), 'mountpoint': tmppart.get_mountpoint(), 'mountopts': tmppart.get_mountopts(), 'format': tmppart.get_format(), 'mkfsopts': tmppart.get_mkfsopts(), 'start': 0, 'end': 0 }
219 return devdic 304 return devdic
220 305
306 ##
307 # Returns the minor of the extended partition, if any
221 def get_extended_partition(self): 308 def get_extended_partition(self):
222 for part in self._partitions: 309 for part in self._partitions:
223 tmppart = self._partitions[part] 310 tmppart = self._partitions[part]
224 if tmppart.is_extended(): 311 if tmppart.is_extended():
225 return part 312 return part
226 return 0 313 return 0
227 314
315 ##
316 # Returns the drive model
317 def get_model(self):
318 return self._parted_dev.model
319
320 ##
321 # Sets the disklabel type
322 def set_disklabel(self, disklabel):
323 self._disklabel = disklabel
324
325 ##
326 # Returns the disklabel type
327 def get_disklabel(self):
328 return self._disklabel
329
330 ##
331 # Returns the number of sectors on the device
228 def get_num_sectors(self): 332 def get_num_sectors(self):
229 return int(self._total_sectors) 333 return long(self._total_sectors)
230 334
335 ##
336 # Returns the size of a cylinder in bytes
231 def get_cylinder_size(self): 337 def get_cylinder_size(self):
232 return int(self._cylinder_bytes) 338 return long(self._cylinder_bytes)
233 339
340 ##
341 # Returns the size of a sector in bytes
234 def get_sector_size(self): 342 def get_sector_size(self):
235 return int(self._sector_bytes) 343 return long(self._sector_bytes)
236 344
345 ##
346 # Returns the number of cylinders
237 def get_num_cylinders(self): 347 def get_num_cylinders(self):
238 return int(self._geometry['cylinders']) 348 return long(self._geometry['cylinders'])
239 349
350 ##
351 # Returns the total number of bytes on the device
240 def get_drive_bytes(self): 352 def get_drive_bytes(self):
241 return int(self._total_bytes) 353 return long(self._total_bytes)
242 354
355 ##
356 # Returns the total number of MB on the device
357 def get_total_mb(self):
358 return self._total_mb
359
360 ##
361 # Returns partition info dictionary
243 def get_partitions(self): 362 def get_partitions(self):
244 return self._partitions 363 return self._partitions
245 364
246 def print_partitions(self): 365 ##
247 for part in self._partitions.keys(): 366 # Prints disk geometry to STDOUT (no longer used)
248 print self._partitions[part].return_info()
249
250 def print_geometry(self): 367 def print_geometry(self):
251 print self._total_bytes, self._geometry 368 print self._total_bytes, self._geometry
252 369
253 def _error(self, message): 370##
254 "Raises an exception" 371# This class represents a partition within a GLIStorageDevice object
255 raise "DeviceObjectError", message
256
257 def _run(self, cmd):
258 "Runs a command and returns the output"
259
260 # Run command
261 output_string = commands.getoutput(cmd)
262
263 # What we will return
264 output_list = []
265
266 # As long as there is a new line in the output_string
267 while output_string.find("\n") != -1:
268
269 # Find the \n in the string
270 index = output_string.find("\n") + 1
271
272 # Add the line to the output and remove it from
273 # the output_string
274 output_list.append(output_string[:index])
275 output_string = output_string[index:]
276
277 # return output
278 return output_list
279
280
281class Partition: 372class Partition:
282 "Class representing a single partition within a Device object" 373 "Class representing a single partition within a Device object"
283 374
284 _device = None 375 _device = None
285 _minor = None 376 _minor = 0
286 _orig_minor = "" 377 _orig_minor = 0
287 _bootflag = None
288 _start = None 378 _start = 0
289 _end = None 379 _end = 0
290 _blocks = None
291 _type = None 380 _type = None
292 _mountpoint = None 381 _mountpoint = None
293 _mountopts = None 382 _mountopts = None
294 _format = None 383 _format = None
295 _resizeable = None 384 _resizeable = None
296 _min_sectors_for_resize = 0 385 _min_mb_for_resize = 0
386 _mb = 0
387 _mkfsopts = None
297 388
389 ##
390 # Initialization function for the Partition class
391 # @param device Parent GLIStorageDevice object
392 # @param minor Minor of partition
393 # @param mb Parameter Size of partition in MB
394 # @param start Parameter Start sector of partition
395 # @param end Parameter Start sector of partition
396 # @param type Parameter Type of partition (ext2, ext3, fat32, linux-swap, free, extended, etc.)
397 # @param mountpoint='' Mountpoint of partition
398 # @param mountopts='' Mount options of partition
399 # @param mkfsopts='' Additional mkfs options
400 # @param format=True Format partition
401 # @param existing=False This partition exists on disk
298 def __init__(self, device, minor, bootflag, start, end, blocks, type, mountpoint='', mountopts='', format=True, existing=False): 402 def __init__(self, device, minor, mb, start, end, type, mountpoint='', mountopts='', format=True, existing=False, origminor=0, mkfsopts=''):
299 self._device = device 403 self._device = device
300 self._minor = int(minor) 404 self._minor = float(minor)
301 if existing: self._orig_minor = int(minor)
302 self._bootflag = bootflag
303 self._start = int(start) 405 self._start = long(start)
304 self._end = int(end) 406 self._end = long(end)
305 self._blocks = int(blocks)
306 if type == "": type = "unknown" 407 self._type = type or "unknown"
307 self._type = type
308 self._mountpoint = mountpoint 408 self._mountpoint = mountpoint
309 self._mountopts = mountopts 409 self._mountopts = mountopts
310 self._format = format 410 self._format = format
311 if blocks == 0: 411 self._mb = mb
312 self._blocks = ((self._end - self._start) * self._device.get_cylinder_size()) / 512 412 self._orig_minor = origminor
413 self._mkfsopts = mkfsopts
414 if type != "free":
415 if existing and not origminor:
416 self._orig_minor = self._minor
417 self._minor = int(self._minor)
418 self._orig_minor = int(self._orig_minor)
313 if existing: 419 if existing:
420 try:
314 parted_part = device._parted_disk.get_partition(minor) 421 parted_part = device._parted_disk.get_partition(self._orig_minor)
422 label_type = device._parted_disk.type.name
423 if label_type == "loop":
424 dev_node = device._device
425 else:
426 dev_node = device._device + str(self._orig_minor)
427# print "dev_node = " + dev_node
315 if type == "ntfs": 428 if type == "ntfs":
316 min_bytes = int(commands.getoutput("ntfsresize -f --info " + device._device + str(minor) + " | grep -e '^You might resize' | sed -e 's/You might resize at //' -e 's/ bytes or .\+//'")) 429 min_bytes = long(commands.getoutput("ntfsresize -f --info " + dev_node + " | grep -e '^You might resize' | sed -e 's/You might resize at //' -e 's/ bytes or .\+//'"))
317 self._min_cylinders_for_resize = int(min_bytes / self._device._cylinder_bytes) + 1 430 self._min_mb_for_resize = long(min_bytes / MEGABYTE) + 1
318 self._resizeable == True 431 self._resizeable = True
319 elif type == "ext2" or type == "ext3": 432 elif type == "ext2" or type == "ext3":
320 block_size = string.strip(commands.getoutput("dumpe2fs -h " + device._device + str(minor) + r" 2>&1 | grep -e '^Block size:' | sed -e 's/^Block size:\s\+//'")) 433 block_size = long(string.strip(commands.getoutput("dumpe2fs -h " + dev_node + r" 2>&1 | grep -e '^Block size:' | sed -e 's/^Block size:\s\+//'")))
321 free_blocks = string.strip(commands.getoutput("dumpe2fs -h " + device._device + str(minor) + r" 2>&1 | grep -e '^Free blocks:' | sed -e 's/^Free blocks:\s\+//'")) 434 free_blocks = long(string.strip(commands.getoutput("dumpe2fs -h " + dev_node + r" 2>&1 | grep -e '^Free blocks:' | sed -e 's/^Free blocks:\s\+//'")))
322 free_sec = int(int(block_size) * int(free_blocks) / self._device._sector_bytes) 435 free_bytes = long(block_size * free_blocks)
323 free_sec = free_sec - 2000 # just to be safe 436 # can't hurt to pad (the +50) it a bit since this is really just a guess
324 self._min_sectors_for_resize = (self._end - self._start + 1) - free_sec 437 self._min_mb_for_resize = self._mb - long(free_bytes / MEGABYTE) + 50
325 self._resizeable == True 438 self._resizeable = True
326 else: 439 else:
327 parted_part = self._device._parted_disk.get_partition(self._minor) 440 parted_part = self._device._parted_disk.get_partition(int(self._orig_minor))
328 try:
329 parted_fs = parted_part.geom.file_system_open() 441 parted_fs = parted_part.geom.file_system_open()
330 except:
331 self._resizeable = False
332 return
333 resize_constraint = parted_fs.get_resize_constraint() 442 resize_constraint = parted_fs.get_resize_constraint()
334 min_size = resize_constraint.min_size 443 min_bytes = resize_constraint.min_size * self._device._sector_bytes
335 if int(min_size) != min_size: min_size = int(min_size) + 1 444 self._min_mb_for_resize = long(min_bytes / MEGABYTE) + 1
336 self._min_sectors_for_resize = min_size
337 self._resizeable = True 445 self._resizeable = True
446 except:
447 self._resizeable = False
338 448
449 ##
450 # Returns whether or not the partition is extended
339 def is_extended(self): 451 def is_extended(self):
340 if self._type == "extended": 452 if self._type == "extended":
341 return True 453 return True
342 else: 454 else:
343 return False 455 return False
344 456
457 ##
458 # Returns whether or not the partition is logical
345 def is_logical(self): 459 def is_logical(self):
346 part = self._device.get_partition_at(self._start, ignore_extended=0) 460 if self._type == "free":
347 if part and self._device._partitions[part].is_extended() and not part == self._minor: 461 if int(self._minor) + FREE_MINOR_FRAC_LOG == self._minor:
462 return True
463 else:
464 return False
465 elif archinfo[self._device._arch]['extended'] and self._minor > 4:
348 return True 466 return True
467 else:
349 return False 468 return False
350 469
470 ##
471 # Returns a list of logical partitions if this is an extended partition
351 def get_logicals(self): 472 def get_logicals(self):
352 if not self.is_extended(): 473 if not self.is_extended():
353 return None 474 return None
354 logicals = [] 475 logicals = []
355 start = self._start
356 parts = self._device._partitions.keys() 476 parts = self._device._partitions.keys()
357 parts.sort() 477 parts.sort()
358 for part in parts: 478 for part in parts:
359 if part < 5: continue 479 if part < 5: continue
360 logicals.append(part) 480 logicals.append(part)
361 logicals.sort() 481 logicals.sort()
362 return logicals 482 return logicals
363 483
484 ##
485 # Returns the extened parent partition if this is a logical partition (no longer used)
364 def get_extended_parent(self): 486 def get_extended_parent(self):
365 if not self.is_logical(): 487 if not self.is_logical():
366 return None 488 return None
367 else: 489 else:
368 return self._device.get_partition_at(self._start, ignore_extended=0) 490 return self._device.get_partition_at(self._start, ignore_extended=0)
369 491
492 ##
493 # Sets the options passed to mkfs
494 # @param mkfsopts Options passed to mkfs
495 def set_mkfsopts(self, mkfsopts):
496 self._mkfsopts = mkfsopts
497
498 ##
499 # Returns the options passes to mkfs
500 def get_mkfsopts(self):
501 return self._mkfsopts
502
503 ##
504 # Sets the start sector for the partition
505 # @param start Start sector
370 def set_start(self, start): 506 def set_start(self, start):
371 self._start = int(start) 507 self._start = long(start)
372 self._blocks = ((self._end - self._start) * self._device.get_cylinder_size()) / 512
373 508
509 ##
510 # Returns the start sector for the partition
374 def get_start(self): 511 def get_start(self):
375 return int(self._start) 512 return long(self._start)
376 513
514 ##
515 # Sets the end sector of the partition
516 # @param end End sector
377 def set_end(self, end): 517 def set_end(self, end):
378 self._end = int(end) 518 self._end = long(end)
379 self._blocks = ((self._end - self._start) * self._device.get_cylinder_size()) / 512
380 519
520 ##
521 # Returns end sector for the partition
381 def get_end(self): 522 def get_end(self):
382 return int(self._end) 523 return long(self._end)
383 524
525 ##
526 # Returns size of partition in MB
527 def get_mb(self):
528 return long(self._mb)
529
530 ##
531 # Sets size of partition in MB
532 # @param mb Parameter description
533 def set_mb(self, mb):
534 self._mb = long(mb)
535
536 ##
537 # Sets type of partition
538 # @param type Parameter description
384 def set_type(self, type): 539 def set_type(self, type):
385 self._type = type 540 self._type = type
386 541
542 ##
543 # Returns type of partition
387 def get_type(self): 544 def get_type(self):
388 return self._type 545 return self._type
389 546
547 ##
548 # Returns parent GLIStorageDevice object
390 def get_device(self): 549 def get_device(self):
391 return self._device 550 return self._device
392 551
552 ##
553 # Sets minor of partition
554 # @param minor New minor
393 def set_minor(self, minor): 555 def set_minor(self, minor):
394 self._minor = int(minor) 556 self._minor = float(minor)
395 557
558 ##
559 # Returns minor of partition
396 def get_minor(self): 560 def get_minor(self):
397 return int(self._minor) 561 return float(self._minor)
398 562
563 ##
564 # Sets the original minor of the partition
565 # @param orig_minor Parameter description
399 def set_orig_minor(self, orig_minor): 566 def set_orig_minor(self, orig_minor):
400 self._orig_minor = int(orig_minor) 567 self._orig_minor = int(orig_minor)
401 568
569 ##
570 # Returns the original minor of the partition
402 def get_orig_minor(self): 571 def get_orig_minor(self):
403 return self._orig_minor 572 return self._orig_minor
404 573
574 ##
575 # Sets the mountpoint for the partition
576 # @param mountpoint Mountpoint
405 def set_mountpoint(self, mountpoint): 577 def set_mountpoint(self, mountpoint):
406 self._mountpoint = mountpoint 578 self._mountpoint = mountpoint
407 579
580 ##
581 # Returns the mountpoint for the partition
408 def get_mountpoint(self): 582 def get_mountpoint(self):
409 return self._mountpoint 583 return self._mountpoint
410 584
585 ##
586 # Sets the mount options for the partition
587 # @param mountopts Mount options
411 def set_mountopts(self, mountopts): 588 def set_mountopts(self, mountopts):
412 self._mountopts = mountopts 589 self._mountopts = mountopts
413 590
591 ##
592 # Returns the mount options for the partition
414 def get_mountopts(self): 593 def get_mountopts(self):
415 return self._mountopts 594 return self._mountopts
416 595
596 ##
597 # Set whether to format the partition
598 # @param format Format this partition (True/False)
417 def set_format(self, format): 599 def set_format(self, format):
418 self._format = format 600 self._format = format
419 601
602 ##
603 # Returns whether to format the partition
420 def get_format(self): 604 def get_format(self):
421 return self._format 605 return self._format
422 606
423 def get_blocks(self): 607 ##
424 return int(self._blocks) 608 # Returns whether the partition is resizeable
609 def is_resizeable(self):
610 return self._resizeable
425 611
612 ##
613 # Returns minimum MB for resize
426 def get_min_sectors_for_resize(self): 614 def get_min_mb_for_resize(self):
427 if self.is_extended(): 615# if self.is_extended():
428 min_size = self._start 616# min_size = self._start
429 for part in self._device._partitions: 617# for part in self._device._partitions:
430 if part < 5: continue 618# if part < 5: continue
431 if part.get_end > min_size: min_size = part.get_end() 619# if part.get_end > min_size: min_size = part.get_end()
432 return min_size 620# return min_size
433 else: 621# else:
622 if self._resizeable:
434 return self._min_sectors_for_resize 623 return self._min_mb_for_resize
624 else:
625 return -1
435 626
627 ##
628 # Returns maximum MB for resize
436 def get_max_sectors_for_resize(self): 629 def get_max_mb_for_resize(self):
437 free_start, free_end = self._device.get_free_space(self._end) 630 if self._resizeable:
438 if free_end == -1: return self._end 631 free_minor = 0
439 if free_start - 1 == self._end:
440 if self.is_logical(): 632 if self.is_logical():
441 if free_end <= self._device._partitions[self.get_extended_parent()]._end: 633 free_minor = self._minor + FREE_MINOR_FRAC_LOG
442 return free_end - self._start
443 else:
444 return self._end - self._start
445 else: 634 else:
446 return free_end - self._start 635 free_minor = self._minor + FREE_MINOR_FRAC_PRI
636 if free_minor in self._device._partitions:
637 return self._mb + self._device._partitions[free_minor]._mb
638 else:
639 return self._mb
640 else:
641 return -1
447 642
643 ##
644 # Resizes the partition
645 # @param mb New size in MB
448 def resize(self, start, end): 646 def resize(self, mb):
449 part_at_start = self._device.get_partition_at(int(start)) 647 free_minor = self._minor
450 part_at_end = self._device.get_partition_at(int(end))
451 logicals = None
452 if self.is_logical(): 648 if self.is_logical():
453 parent = self.get_extended_parent() 649 free_minor += FREE_MINOR_FRAC_LOG
454 parentstart = int(self._device._partitions[parent].get_start()) 650 else:
455 parentend = int(self._device._partitions[parent].get_end()) 651 free_minor += FREE_MINOR_FRAC_PRI
456 if (start < parentstart) or (end > parentend): return 0 652 if mb < self._mb:
457 if self.is_extended(): 653 # Shrinking
458 logicals = self.get_logicals() 654 if not free_minor in self._device._partitions:
459 if len(logicals): 655 self._device._partitions[free_minor] = Partition(self._device, free_minor, 0, 0, 0, "free", format=False, existing=False)
460 logicals_start = self._device._partitions[logicals[0]].get_start() 656 self._device._partitions[free_minor]._mb += self._mb - mb
461 logicals_end = self._device._partitions[logicals[len(logicals)-1]].get_end() 657 self._mb = mb
462 if (start > logicals_start) or (end < logicals_end): return 0 658 elif mb == self._mb + self._device._partitions[free_minor]._mb:
463 if part_at_start in logicals: part_at_start = 0 659 # Using all available unallocated space
464 if part_at_end in logicals: part_at_end = 0 660 del self._device._partitions[free_minor]
465 if ((not part_at_start == 0) and (part_at_start != self._minor)) or ((not part_at_end == 0) and (part_at_end != self._minor)): 661 self._mb = mb
466 return 0 662 elif mb > self._mb:
467 self.set_start(start) 663 # Growing
468 self.set_end(end) 664 self._device._partitions[free_minor]._mb = mb - self._mb
469 return 1 665 self._mb = mb
470 666
471 def _error(self, message): 667##
472 "Raises an exception" 668# Returns a list of detected partitionable devices
473 raise "PartitionObjectError", message
474
475
476def detect_devices(): 669def detect_devices():
477 "Returns a list of partitionable devices on the system"
478
479 devices = [] 670 devices = []
480 671
481 # Make sure sysfs exists 672 # Make sure sysfs exists
673 # TODO: rewrite for 2.4 support
482 if not os.path.exists("/sys/bus"): 674 if not os.path.exists("/sys/bus"):
483 raise Exception, "no sysfs found (you MUST use a kernel >2.6)" 675 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "no sysfs found (you MUST use a kernel >2.6)")
484 # Make sure /proc/partitions exists 676 # Make sure /proc/partitions exists
485 if not os.path.exists("/proc/partitions"): 677 if not os.path.exists("/proc/partitions"):
486 raise Exception, "/proc/partitions does not exist!" 678 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "/proc/partitions does not exist! Please make sure procfs is in your kernel and mounted!")
487 679
488 # Load /proc/partitions into the variable 'partitions' 680 # Load /proc/partitions into the variable 'partitions'
489 partitions = [] 681 partitions = []
490 for line in open("/proc/partitions"): 682 for line in open("/proc/partitions"):
491 if len(line.split()) < 4 or not line.split()[0].isdigit() or \ 683 if len(line.split()) < 4 or not line.split()[0].isdigit() or not line.split()[1].isdigit():
492 not line.split()[1].isdigit():
493 continue 684 continue
494 685
495 # Get the major, minor and device name 686 # Get the major, minor and device name
496 major = line.split()[0] 687 major = line.split()[0]
497 minor = line.split()[1] 688 minor = line.split()[1]
507 # all the devices in /dev to try and find a 698 # all the devices in /dev to try and find a
508 # devices with the same major and minor 699 # devices with the same major and minor
509 if not os.path.exists(device): 700 if not os.path.exists(device):
510 device = None 701 device = None
511 for path, dirs, files in os.walk("/dev"): 702 for path, dirs, files in os.walk("/dev"):
512 for file in files: 703 for d_file in files:
513 full_file = os.path.join(path, file) 704 full_file = os.path.join(path, d_file)
514 if not os.path.exists(full_file): 705 if not os.path.exists(full_file):
515 continue 706 continue
516 statres = os.stat(full_file) 707 statres = os.stat(full_file)
517 fmaj = os.major(statres.st_rdev) 708 fmaj = os.major(statres.st_rdev)
518 fmin = os.minor(statres.st_rdev) 709 fmin = os.minor(statres.st_rdev)
524 715
525 partitions.append(( major, minor, device )) 716 partitions.append(( major, minor, device ))
526 717
527 # Scan sysfs for the devices of type 'x' 718 # Scan sysfs for the devices of type 'x'
528 # 'x' being a member of the list below: 719 # 'x' being a member of the list below:
720 # TODO: rewrite for 2.4 support
529 for dev_type in [ "ide", "scsi" ]: # Other device types? usb? fw? 721 for dev_type in [ "ide", "scsi" ]: # Other device types? usb? fw?
530 if os.path.exists("/sys/bus/" + dev_type): 722 if os.path.exists("/sys/bus/" + dev_type):
531 sysfs_devices = os.listdir("/sys/bus/"+dev_type+"/devices") 723 sysfs_devices = os.listdir("/sys/bus/"+dev_type+"/devices")
532 724
533 # For each device in the devices on that bus 725 # For each device in the devices on that bus
534 for sysfs_device in sysfs_devices: 726 for sysfs_device in sysfs_devices:
535 dev_file = "/sys/bus/" + dev_type + "/devices/"\ 727 dev_file = "/sys/bus/" + dev_type + "/devices/" + sysfs_device + "/block/dev"
536 + sysfs_device + "/block/dev"
537 728
538 # If the file is not a block device, loop 729 # If the file is not a block device, loop
539 if not os.path.exists(dev_file): 730 if not os.path.exists(dev_file):
540 continue 731 continue
541 732
543 try: 734 try:
544 major, minor = open(dev_file).read().split(":") 735 major, minor = open(dev_file).read().split(":")
545 major = int(major) 736 major = int(major)
546 minor = int(minor) 737 minor = int(minor)
547 except: 738 except:
548 raise Exception, "invalid major minor in "\ 739 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "invalid major minor in " + dev_file)
549 + dev_file
550 740
551 # Find a device listed in /proc/partitions 741 # Find a device listed in /proc/partitions
552 # that has the same minor and major as our 742 # that has the same minor and major as our
553 # current block device. 743 # current block device.
554 for record in partitions: 744 for record in partitions:
555 if major == record[0] and minor == record[1]: 745 if major == record[0] and minor == record[1]:
556 devices.append(record[2]) 746 devices.append(record[2])
557 747
748 # For testing the partitioning code
749 if GLIUtility.is_file("/tmp/disk.img"):
750 devices.append("/tmp/disk.img")
751
558 # We have assembled the list of devices, so return it 752 # We have assembled the list of devices, so return it
559 return devices 753 return devices

Legend:
Removed from v.386  
changed lines
  Added in v.924

  ViewVC Help
Powered by ViewVC 1.1.20