/[gli]/trunk/src/GLIStorageDevice.py
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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 _applied_recommended = False
43
44 ##
45 # Initialization function for GLIStorageDevice class
46 # @param device Device node (e.g. /dev/hda) of device being represented
47 # @param arch="x86" Architecture that we're partition for (defaults to 'x86' for now)
48 def __init__(self, device, arch="x86", set_geometry=True, virtual=False, size_known=False):
18 self._device = device 49 self._device = device
19 self._partitions = {} 50 self._partitions = {}
20 self._geometry = {'cylinders': 0, 'heads': 0, 'sectors': 0, 'sectorsize': 512} 51 self._geometry = {'cylinders': 0, 'heads': 0, 'sectors': 0, 'sectorsize': 512}
21 self._total_bytes = 0 52 self._total_bytes = 0
22 self._cylinder_bytes = 0 53 self._cylinder_bytes = 0
54 self._arch = arch
23 self._parted_dev = parted.PedDevice.get(self._device) 55 self._parted_dev = parted.PedDevice.get(self._device)
56 try:
24 self._parted_disk = parted.PedDisk.new(self._parted_dev) 57 self._parted_disk = parted.PedDisk.new(self._parted_dev)
58 except:
59 self._parted_disk = self._parted_dev.disk_new_fresh(parted.disk_type_get(archinfo[self._arch]['disklabel']))
60 self._disklabel = self._parted_disk.type.name
61 if set_geometry:
25 self.set_disk_geometry_from_disk() 62 self.set_disk_geometry_from_disk()
26 63
64 ##
65 # Sets disk geometry info from disk. This function is used internally by __init__()
27 def set_disk_geometry_from_disk(self): 66 def set_disk_geometry_from_disk(self):
28 self._total_bytes = self._parted_dev.length * self._parted_dev.sector_size 67 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 68 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 69 self._sector_bytes = self._parted_dev.sector_size
41 self._cylinder_bytes = self._geometry['heads'] * self._geometry['sectors'] * self._sector_bytes 70 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 71 self._total_sectors = self._parted_dev.length
44 self._sectors_in_cylinder = self._geometry['heads'] * self._geometry['sectors'] 72 self._sectors_in_cylinder = self._geometry['heads'] * self._geometry['sectors']
73 self._total_mb = long(self._total_bytes / MEGABYTE)
45 74
75 ##
76 # Sets partition info from disk.
46 def set_partitions_from_disk(self): 77 def set_partitions_from_disk(self):
78 last_part = 0
79 last_log_part = 4
47 parted_part = self._parted_disk.next_partition() 80 parted_part = self._parted_disk.next_partition()
48 while parted_part != None: 81 while parted_part:
82 part_mb = long((parted_part.geom.end - parted_part.geom.start + 1) * self._sector_bytes / MEGABYTE)
49 if parted_part.num < 1: 83 if parted_part.num >= 1:
50 parted_part = self._parted_disk.next_partition(parted_part)
51 continue
52 fs_type = "" 84 fs_type = ""
53 if parted_part.fs_type != None: fs_type = parted_part.fs_type.name 85 if parted_part.fs_type != None: fs_type = parted_part.fs_type.name
54 if parted_part.type == 2: fs_type = "extended" 86 if parted_part.type == 2: fs_type = "extended"
87 if archinfo[self._arch]['extended'] and parted_part.num > 4:
88 last_log_part = parted_part.num
89 else:
90 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) 91 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)
92 elif parted_part.type_name == "free":
93# parent_part = self.get_partition_at(parted_part.geom.start, ignore_extended=0)
94# if parent_part:
95 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():
96 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)
97 last_log_part += 1
98 else:
99 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)
100 last_part += 1
56 parted_part = self._parted_disk.next_partition(parted_part) 101 parted_part = self._parted_disk.next_partition(parted_part)
57 102
103 ##
104 # Imports partition info from the install profile partition structure
105 # @param ips Parameter structure returned from install_profile.get_partition_tables()
58 def set_partitions_from_install_profile_structure(self, ips): 106 def set_partitions_from_install_profile_structure(self, ips):
59 for part in ips: 107 for part in ips:
60 tmppart = ips[part] 108 tmppart = ips[part]
61 existing = False 109 existing = False
62 parted_part = self._parted_disk.get_partition(part) 110 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 111 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'])) 112 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'])
72 113
114 ##
115 # Returns name of device (e.g. /dev/hda) being represented
73 def get_device(self): 116 def get_device(self):
74 return self._device 117 return self._device
75 118
119 ##
120 # Uses magic to apply the recommended partition layout
121 def do_recommended(self):
122 free_minor = 0
123 if self._applied_recommended:
124 raise GLIException("RecommendedPartitionLayoutError", "notice", "do_recommended", "You have already applied the recommended partition layout.")
125 parts = self._partitions.keys()
126 parts.sort()
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 if not free_minor:
131 raise GLIException("RecommendedPartitionLayoutError", "notice", "do_recommended", "You do not have atleast 4GB of concurrent unallocated space. Please remove some partitions and try again.")
132 if not self._partitions[free_minor].is_logical() and archinfo[self._arch]['extended'] and free_minor > 2:
133 raise GLIException("RecommendedPartitionLayoutError", "notice", "do_recommended", "You have more than 1 existing primary partition defined. Please create an extended partition in the remaining unallocated space and try again.")
134 self.add_partition(free_minor, 256, 0, 0, "ext2")
135 self.add_partition(free_minor+1, 1024, 0, 0, "linux-swap")
136 self.add_partition(free_minor+2, self._partitions[free_minor+2].get_mb(), 0, 0, "ext3")
137 self._applied_recommended = True
138 return True
139
140 ##
141 # Combines free space and closes gaps in minor numbers. This is used internally
76 def clear_partitions(self): 142 def tidy_partitions(self):
77 self._partitions = {} 143 last_minor = 0
144 last_log_minor = 4
145 last_free = 0
146 last_log_free = 0
147 parts = self._partitions.keys()
148 parts.sort()
149 for part in parts:
150 if archinfo[self._arch]['extended'] and part > 4: break
151 tmppart = self._partitions[part]
152 if tmppart.get_type() == "extended":
153 for part_log in parts:
154 if part_log < (4 + FREE_MINOR_FRAC_LOG): continue
155 tmppart_log = self._partitions[part_log]
156 if tmppart_log.get_type() == "free":
157 if last_log_minor < last_log_free:
158 self._partitions[last_log_free].set_mb(self._partitions[last_log_free].get_mb()+tmppart_log.get_mb())
159 del self._partitions[part_log]
160 else:
161 if not last_log_free:
162 last_log_free = last_log_minor + FREE_MINOR_FRAC_LOG
163 else:
164 last_log_free = part_log
165 tmppart_log.set_minor(last_log_free)
166 self._partitions[last_log_free] = tmppart_log
167 if part_log != last_log_free: del self._partitions[part_log]
168 else:
169 if part_log > (last_log_minor + 1):
170 tmppart_log.set_minor(last_log_minor + 1)
171 last_log_minor = last_log_minor + 1
172 self._partitions[last_log_minor] = tmppart_log
173 del self._partitions[part_log]
174 else:
175 last_log_minor = part_log
176 elif tmppart.get_type() == "free":
177 if last_minor < last_free:
178 self._partitions[last_free].set_mb(self._partitions[last_free].get_mb()+tmppart.get_mb())
179 del self._partitions[part]
180 else:
181 if not last_free:
182 last_free = last_minor + FREE_MINOR_FRAC_PRI
183 else:
184 last_free = part
185 tmppart.set_minor(last_free)
186 self._partitions[last_free] = tmppart
187 if part != last_free: del self._partitions[part]
188 else:
189 if part > (last_minor + 1):
190 tmppart.set_minor(last_minor + 1)
191 last_minor = last_minor + 1
192 self._partitions[last_minor] = tmppart
193 del self._partitions[part]
194 else:
195 last_minor = part
78 196
197 ##
198 # Adds a new partition to the partition info
199 # @param free_minor minor of unallocated space partition is being created in
200 # @param mb size of partition in MB
201 # @param start Start sector (only used for existing partitions)
202 # @param end End sector (only used for existing partitions)
203 # @param type Partition type (ext2, ext3, fat32, linux-swap, free, extended, etc.)
204 # @param mountpoint='' Partition mountpoint
205 # @param mountopts='' Partition mount options
206 # @param mkfsopts='' Additional mkfs options
79 def add_partition(self, minor, start, end, type, mountpoint='', mountopts=''): 207 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) 208 new_minor = int(free_minor) + 1
82 if not free_end:
83 return False
84 if self._partitions.has_key(minor): 209 if self._partitions.has_key(new_minor):
85 parts = self._partitions.keys() 210 parts = self._partitions.keys()
86 parts.sort() 211 parts.sort()
87 parts.reverse() 212 parts.reverse()
88 hole_at = 0 213 hole_at = 0
89 for i in range(1, parts[0]+1): 214 for i in range(1, parts[0]+1):
90 if i <= minor: continue 215 if i <= new_minor: continue
91 if not self._partitions.has_key(int(i)): 216 if not self._partitions.has_key(i):
92 hole_at = i 217 hole_at = i
93 break 218 break
94 stopscooting = 0 219 stopscooting = 0
95 for i in parts: 220 for i in parts:
96 if stopscooting: break 221 if stopscooting: break
97 if (i >= hole_at) and (hole_at): continue 222 if i >= hole_at and hole_at: continue
98 if i >= minor: 223 if i >= new_minor:
99 self._partitions[i].set_minor(i+1) 224 self._partitions[i].set_minor(i+1)
100 self._partitions[i+1] = self._partitions[i] 225 self._partitions[i+1] = self._partitions[i]
101 if i == minor: stopscooting = 1 226 if i == new_minor: stopscooting = 1
227 if mb != self._partitions[free_minor].get_mb():
228 old_free_mb = self._partitions[free_minor].get_mb()
229 del self._partitions[free_minor]
230 if archinfo[self._arch]['extended'] and new_minor >= 5:
231 free_minor = new_minor + FREE_MINOR_FRAC_LOG
232 else:
233 free_minor = new_minor + FREE_MINOR_FRAC_PRI
234 self._partitions[free_minor] = Partition(self, free_minor, old_free_mb-mb, 0, 0, "free")
235 else:
236 del self._partitions[free_minor]
102 self._partitions[minor] = Partition(self, minor, '', start, end, 0, type, mountpoint=mountpoint, mountopts=mountopts) 237 self._partitions[new_minor] = Partition(self, new_minor, mb, start, end, type, mountpoint=mountpoint, mountopts=mountopts,mkfsopts=mkfsopts)
238 if type == "extended":
239 self._partitions[4 + FREE_MINOR_FRAC_LOG] = Partition(self, (4 + FREE_MINOR_FRAC_LOG), mb, 0, 0, "free")
240 self.tidy_partitions()
103 241
242 ##
243 # Removes partition from partition info
244 # @param minor Minor of partition to remove
104 def remove_partition(self, minor): 245 def remove_partition(self, minor):
246 tmppart = self._partitions[int(minor)]
247 free_minor = 0
248 if tmppart.is_logical():
249 free_minor = int(minor-1)+FREE_MINOR_FRAC_LOG
250 else:
251 free_minor = int(minor-1)+FREE_MINOR_FRAC_PRI
252 if free_minor in self._partitions:
253 self._partitions[free_minor].set_mb(self._partitions[free_minor].get_mb() + tmppart.get_mb())
254 else:
255 self._partitions[free_minor] = Partition(self, free_minor, tmppart.get_mb(), 0, 0, "free", format=False, existing=False)
105 del self._partitions[int(minor)] 256 del self._partitions[int(minor)]
257 self.tidy_partitions()
106 258
107 def get_free_space(self, start): 259 ##
108 GAP_SIZE = 100 260 # Returns an ordered list (disk order) of partition minors
261 def get_ordered_partition_list(self):
109 parts = self._partitions.keys() 262 parts = self._partitions.keys()
110 parts.sort() 263 parts.sort()
111 lastend_pri = 0 264 partlist = []
112 lastend_log = 0 265 tmppart = None
113 free_start = -1
114 free_end = -1
115 if start > self._total_sectors: return (-1, -1)
116 for part in parts: 266 for part in parts:
117 if part > 4: break 267 if archinfo[self._arch]['extended'] and part > (4 + FREE_MINOR_FRAC_PRI): break
118 tmppart = self._partitions[part] 268 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) 269 partlist.append(part)
198 if tmppart.is_extended(): 270 if tmppart.is_extended():
199 for part_log in parts: 271 for part_log in parts:
200 if part_log < 5: continue 272 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) 273 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 274 return partlist
213 275
276 ##
277 # Returns partition info in a format suitable for passing to install_profile.set_partition_tables()
214 def get_install_profile_structure(self): 278 def get_install_profile_structure(self):
215 devdic = {} 279 devdic = {}
216 for part in self._partitions: 280 for part in self._partitions:
217 tmppart = self._partitions[part] 281 tmppart = self._partitions[part]
218 devdic[part] = { 'mb': 0, 'minor': int(part), 'start': tmppart.get_start(), 'end': tmppart.get_end(), 'type': tmppart.get_type(), 'mountpoint': tmppart.get_mountpoint(), 'mountopts': tmppart.get_mountopts(), 'format': tmppart.get_format() } 282 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 283 return devdic
220 284
285 ##
286 # Returns the minor of the extended partition, if any
221 def get_extended_partition(self): 287 def get_extended_partition(self):
222 for part in self._partitions: 288 for part in self._partitions:
223 tmppart = self._partitions[part] 289 tmppart = self._partitions[part]
224 if tmppart.is_extended(): 290 if tmppart.is_extended():
225 return part 291 return part
226 return 0 292 return 0
227 293
294 ##
295 # Returns the drive model
296 def get_model(self):
297 return self._parted_dev.model
298
299 ##
300 # Sets the disklabel type
301 def set_disklabel(self, disklabel):
302 self._disklabel = disklabel
303
304 ##
305 # Returns the disklabel type
306 def get_disklabel(self):
307 return self._disklabel
308
309 ##
310 # Returns the number of sectors on the device
228 def get_num_sectors(self): 311 def get_num_sectors(self):
229 return int(self._total_sectors) 312 return long(self._total_sectors)
230 313
314 ##
315 # Returns the size of a cylinder in bytes
231 def get_cylinder_size(self): 316 def get_cylinder_size(self):
232 return int(self._cylinder_bytes) 317 return long(self._cylinder_bytes)
233 318
319 ##
320 # Returns the size of a sector in bytes
234 def get_sector_size(self): 321 def get_sector_size(self):
235 return int(self._sector_bytes) 322 return long(self._sector_bytes)
236 323
324 ##
325 # Returns the number of cylinders
237 def get_num_cylinders(self): 326 def get_num_cylinders(self):
238 return int(self._geometry['cylinders']) 327 return long(self._geometry['cylinders'])
239 328
329 ##
330 # Returns the total number of bytes on the device
240 def get_drive_bytes(self): 331 def get_drive_bytes(self):
241 return int(self._total_bytes) 332 return long(self._total_bytes)
242 333
334 ##
335 # Returns the total number of MB on the device
336 def get_total_mb(self):
337 return self._total_mb
338
339 ##
340 # Returns partition info dictionary
243 def get_partitions(self): 341 def get_partitions(self):
244 return self._partitions 342 return self._partitions
245 343
246 def print_partitions(self): 344 ##
247 for part in self._partitions.keys(): 345 # Prints disk geometry to STDOUT (no longer used)
248 print self._partitions[part].return_info()
249
250 def print_geometry(self): 346 def print_geometry(self):
251 print self._total_bytes, self._geometry 347 print self._total_bytes, self._geometry
252 348
253 def _error(self, message): 349##
254 "Raises an exception" 350# 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: 351class Partition:
282 "Class representing a single partition within a Device object" 352 "Class representing a single partition within a Device object"
283 353
284 _device = None 354 _device = None
285 _minor = None 355 _minor = 0
286 _bootflag = None 356 _orig_minor = 0
287 _start = None 357 _start = 0
288 _end = None 358 _end = 0
289 _blocks = None
290 _type = None 359 _type = None
291 _mountpoint = None 360 _mountpoint = None
292 _mountopts = None 361 _mountopts = None
293 _format = None 362 _format = None
294 _resizeable = None 363 _resizeable = None
295 _min_sectors_for_resize = 0 364 _min_mb_for_resize = 0
365 _mb = 0
366 _mkfsopts = None
296 367
368 ##
369 # Initialization function for the Partition class
370 # @param device Parent GLIStorageDevice object
371 # @param minor Minor of partition
372 # @param mb Parameter Size of partition in MB
373 # @param start Parameter Start sector of partition
374 # @param end Parameter Start sector of partition
375 # @param type Parameter Type of partition (ext2, ext3, fat32, linux-swap, free, extended, etc.)
376 # @param mountpoint='' Mountpoint of partition
377 # @param mountopts='' Mount options of partition
378 # @param mkfsopts='' Additional mkfs options
379 # @param format=True Format partition
380 # @param existing=False This partition exists on disk
297 def __init__(self, device, minor, bootflag, start, end, blocks, type, mountpoint='', mountopts='', format=True, existing=False): 381 def __init__(self, device, minor, mb, start, end, type, mountpoint='', mountopts='', format=True, existing=False, origminor=0, mkfsopts=''):
298 self._device = device 382 self._device = device
299 self._minor = int(minor) 383 self._minor = float(minor)
300 self._bootflag = bootflag
301 self._start = int(start) 384 self._start = long(start)
302 self._end = int(end) 385 self._end = long(end)
303 self._blocks = int(blocks)
304 if type == "": type = "unknown" 386 self._type = type or "unknown"
305 self._type = type
306 self._mountpoint = mountpoint 387 self._mountpoint = mountpoint
307 self._mountopts = mountopts 388 self._mountopts = mountopts
308 self._format = format 389 self._format = format
309 if blocks == 0: 390 self._mb = mb
310 self._blocks = ((self._end - self._start) * self._device.get_cylinder_size()) / 512 391 self._orig_minor = origminor
392 self._mkfsopts = mkfsopts
393 if type != "free":
394 if existing and not origminor:
395 self._orig_minor = self._minor
396 self._minor = int(self._minor)
397 self._orig_minor = int(self._orig_minor)
311 if existing: 398 if existing:
399 try:
312 parted_part = device._parted_disk.get_partition(minor) 400 parted_part = device._parted_disk.get_partition(self._orig_minor)
401 label_type = device._parted_disk.type.name
402 if label_type == "loop":
403 dev_node = device._device
404 else:
405 dev_node = device._device + str(self._orig_minor)
406# print "dev_node = " + dev_node
313 if type == "ntfs": 407 if type == "ntfs":
314 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 .\+//'")) 408 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 .\+//'"))
315 self._min_cylinders_for_resize = int(min_bytes / self._device._cylinder_bytes) + 1 409 self._min_mb_for_resize = long(min_bytes / MEGABYTE) + 1
316 self._resizeable == True 410 self._resizeable = True
317 elif type == "ext2" or type == "ext3": 411 elif type == "ext2" or type == "ext3":
318 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\+//'")) 412 block_size = long(string.strip(commands.getoutput("dumpe2fs -h " + dev_node + r" 2>&1 | grep -e '^Block size:' | sed -e 's/^Block size:\s\+//'")))
319 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\+//'")) 413 free_blocks = long(string.strip(commands.getoutput("dumpe2fs -h " + dev_node + r" 2>&1 | grep -e '^Free blocks:' | sed -e 's/^Free blocks:\s\+//'")))
320 free_sec = int(int(block_size) * int(free_blocks) / self._device._sector_bytes) 414 free_bytes = long(block_size * free_blocks)
321 free_sec = free_sec - 2000 # just to be safe 415 # can't hurt to pad (the +50) it a bit since this is really just a guess
322 self._min_sectors_for_resize = (self._end - self._start + 1) - free_sec 416 self._min_mb_for_resize = self._mb - long(free_bytes / MEGABYTE) + 50
323 self._resizeable == True 417 self._resizeable = True
324 else: 418 else:
325 parted_part = self._device._parted_disk.get_partition(self._minor) 419 parted_part = self._device._parted_disk.get_partition(int(self._orig_minor))
326 try:
327 parted_fs = parted_part.geom.file_system_open() 420 parted_fs = parted_part.geom.file_system_open()
328 except:
329 self._resizeable = False
330 return
331 resize_constraint = parted_fs.get_resize_constraint() 421 resize_constraint = parted_fs.get_resize_constraint()
332 min_size = resize_constraint.min_size 422 min_bytes = resize_constraint.min_size * self._device._sector_bytes
333 if int(min_size) != min_size: min_size = int(min_size) + 1 423 self._min_mb_for_resize = long(min_bytes / MEGABYTE) + 1
334 self._min_sectors_for_resize = min_size
335 self._resizeable = True 424 self._resizeable = True
425 except:
426 self._resizeable = False
336 427
428 ##
429 # Returns whether or not the partition is extended
337 def is_extended(self): 430 def is_extended(self):
338 if self._type == "extended": 431 if self._type == "extended":
339 return True 432 return True
340 else: 433 else:
341 return False 434 return False
342 435
436 ##
437 # Returns whether or not the partition is logical
343 def is_logical(self): 438 def is_logical(self):
344 part = self._device.get_partition_at(self._start, ignore_extended=0) 439 if self._type == "free":
345 if part and self._device._partitions[part].is_extended() and not part == self._minor: 440 if int(self._minor) + FREE_MINOR_FRAC_LOG == self._minor:
441 return True
442 else:
443 return False
444 elif archinfo[self._device._arch]['extended'] and self._minor > 4:
346 return True 445 return True
446 else:
347 return False 447 return False
348 448
449 ##
450 # Returns a list of logical partitions if this is an extended partition
349 def get_logicals(self): 451 def get_logicals(self):
350 if not self.is_extended(): 452 if not self.is_extended():
351 return None 453 return None
352 logicals = [] 454 logicals = []
353 start = self._start
354 parts = self._device._partitions.keys() 455 parts = self._device._partitions.keys()
355 parts.sort() 456 parts.sort()
356 for part in parts: 457 for part in parts:
357 if part < 5: continue 458 if part < 5: continue
358 logicals.append(part) 459 logicals.append(part)
359 logicals.sort() 460 logicals.sort()
360 return logicals 461 return logicals
361 462
463 ##
464 # Returns the extened parent partition if this is a logical partition (no longer used)
362 def get_extended_parent(self): 465 def get_extended_parent(self):
363 if not self.is_logical(): 466 if not self.is_logical():
364 return None 467 return None
365 else: 468 else:
366 return self._device.get_partition_at(self._start, ignore_extended=0) 469 return self._device.get_partition_at(self._start, ignore_extended=0)
367 470
471 ##
472 # Sets the options passed to mkfs
473 # @param mkfsopts Options passed to mkfs
474 def set_mkfsopts(self, mkfsopts):
475 self._mkfsopts = mkfsopts
476
477 ##
478 # Returns the options passes to mkfs
479 def get_mkfsopts(self):
480 return self._mkfsopts
481
482 ##
483 # Sets the start sector for the partition
484 # @param start Start sector
368 def set_start(self, start): 485 def set_start(self, start):
369 self._start = int(start) 486 self._start = long(start)
370 self._blocks = ((self._end - self._start) * self._device.get_cylinder_size()) / 512
371 487
488 ##
489 # Returns the start sector for the partition
372 def get_start(self): 490 def get_start(self):
373 return int(self._start) 491 return long(self._start)
374 492
493 ##
494 # Sets the end sector of the partition
495 # @param end End sector
375 def set_end(self, end): 496 def set_end(self, end):
376 self._end = int(end) 497 self._end = long(end)
377 self._blocks = ((self._end - self._start) * self._device.get_cylinder_size()) / 512
378 498
499 ##
500 # Returns end sector for the partition
379 def get_end(self): 501 def get_end(self):
380 return int(self._end) 502 return long(self._end)
381 503
504 ##
505 # Returns size of partition in MB
506 def get_mb(self):
507 return long(self._mb)
508
509 ##
510 # Sets size of partition in MB
511 # @param mb Parameter description
512 def set_mb(self, mb):
513 self._mb = long(mb)
514
515 ##
516 # Sets type of partition
517 # @param type Parameter description
382 def set_type(self, type): 518 def set_type(self, type):
383 self._type = type 519 self._type = type
384 520
521 ##
522 # Returns type of partition
385 def get_type(self): 523 def get_type(self):
386 return self._type 524 return self._type
387 525
526 ##
527 # Returns parent GLIStorageDevice object
388 def get_device(self): 528 def get_device(self):
389 return self._device 529 return self._device
390 530
531 ##
532 # Sets minor of partition
533 # @param minor New minor
391 def set_minor(self, minor): 534 def set_minor(self, minor):
392 self._minor = int(minor) 535 self._minor = float(minor)
393 536
537 ##
538 # Returns minor of partition
394 def get_minor(self): 539 def get_minor(self):
395 return int(self._minor) 540 return float(self._minor)
396 541
542 ##
543 # Sets the original minor of the partition
544 # @param orig_minor Parameter description
545 def set_orig_minor(self, orig_minor):
546 self._orig_minor = int(orig_minor)
547
548 ##
549 # Returns the original minor of the partition
550 def get_orig_minor(self):
551 return self._orig_minor
552
553 ##
554 # Sets the mountpoint for the partition
555 # @param mountpoint Mountpoint
397 def set_mountpoint(self, mountpoint): 556 def set_mountpoint(self, mountpoint):
398 self._mountpoint = mountpoint 557 self._mountpoint = mountpoint
399 558
559 ##
560 # Returns the mountpoint for the partition
400 def get_mountpoint(self): 561 def get_mountpoint(self):
401 return self._mountpoint 562 return self._mountpoint
402 563
564 ##
565 # Sets the mount options for the partition
566 # @param mountopts Mount options
403 def set_mountopts(self, mountopts): 567 def set_mountopts(self, mountopts):
404 self._mountopts = mountopts 568 self._mountopts = mountopts
405 569
570 ##
571 # Returns the mount options for the partition
406 def get_mountopts(self): 572 def get_mountopts(self):
407 return self._mountopts 573 return self._mountopts
408 574
575 ##
576 # Set whether to format the partition
577 # @param format Format this partition (True/False)
409 def set_format(self, format): 578 def set_format(self, format):
410 self._format = format 579 self._format = format
411 580
581 ##
582 # Returns whether to format the partition
412 def get_format(self): 583 def get_format(self):
413 return self._format 584 return self._format
414 585
415 def get_blocks(self): 586 ##
416 return int(self._blocks) 587 # Returns whether the partition is resizeable
588 def is_resizeable(self):
589 return self._resizeable
417 590
591 ##
592 # Returns minimum MB for resize
418 def get_min_sectors_for_resize(self): 593 def get_min_mb_for_resize(self):
419 if self.is_extended(): 594# if self.is_extended():
420 min_size = self._start 595# min_size = self._start
421 for part in self._device._partitions: 596# for part in self._device._partitions:
422 if part < 5: continue 597# if part < 5: continue
423 if part.get_end > min_size: min_size = part.get_end() 598# if part.get_end > min_size: min_size = part.get_end()
424 return min_size 599# return min_size
425 else: 600# else:
601 if self._resizeable:
426 return self._min_sectors_for_resize 602 return self._min_mb_for_resize
603 else:
604 return -1
427 605
606 ##
607 # Returns maximum MB for resize
428 def get_max_sectors_for_resize(self): 608 def get_max_mb_for_resize(self):
429 free_start, free_end = self._device.get_free_space(self._end) 609 if self._resizeable:
430 if free_end == -1: return self._end 610 free_minor = 0
431 if free_start - 1 == self._end:
432 if self.is_logical(): 611 if self.is_logical():
433 if free_end <= self._device._partitions[self.get_extended_parent()]._end: 612 free_minor = self._minor + FREE_MINOR_FRAC_LOG
434 return free_end - self._start
435 else:
436 return self._end - self._start
437 else: 613 else:
438 return free_end - self._start 614 free_minor = self._minor + FREE_MINOR_FRAC_PRI
615 if free_minor in self._device._partitions:
616 return self._mb + self._device._partitions[free_minor]._mb
617 else:
618 return self._mb
619 else:
620 return -1
439 621
622 ##
623 # Resizes the partition
624 # @param mb New size in MB
440 def resize(self, start, end): 625 def resize(self, mb):
441 part_at_start = self._device.get_partition_at(int(start)) 626 free_minor = self._minor
442 part_at_end = self._device.get_partition_at(int(end))
443 logicals = None
444 if self.is_logical(): 627 if self.is_logical():
445 parent = self.get_extended_parent() 628 free_minor += FREE_MINOR_FRAC_LOG
446 parentstart = int(self._device._partitions[parent].get_start()) 629 else:
447 parentend = int(self._device._partitions[parent].get_end()) 630 free_minor += FREE_MINOR_FRAC_PRI
448 if (start < parentstart) or (end > parentend): return 0 631 if mb < self._mb:
449 if self.is_extended(): 632 # Shrinking
450 logicals = self.get_logicals() 633 if not free_minor in self._device._partitions:
451 if len(logicals): 634 self._device._partitions[free_minor] = Partition(self._device, free_minor, 0, 0, 0, "free", format=False, existing=False)
452 logicals_start = self._device._partitions[logicals[0]].get_start() 635 self._device._partitions[free_minor]._mb += self._mb - mb
453 logicals_end = self._device._partitions[logicals[len(logicals)-1]].get_end() 636 self._mb = mb
454 if (start > logicals_start) or (end < logicals_end): return 0 637 elif mb == self._mb + self._device._partitions[free_minor]._mb:
455 if part_at_start in logicals: part_at_start = 0 638 # Using all available unallocated space
456 if part_at_end in logicals: part_at_end = 0 639 del self._device._partitions[free_minor]
457 if ((not part_at_start == 0) and (part_at_start != self._minor)) or ((not part_at_end == 0) and (part_at_end != self._minor)): 640 self._mb = mb
458 return 0 641 elif mb > self._mb:
459 self.set_start(start) 642 # Growing
460 self.set_end(end) 643 self._device._partitions[free_minor]._mb = mb - self._mb
461 return 1 644 self._mb = mb
462 645
463 def _error(self, message): 646##
464 "Raises an exception" 647# Returns a list of detected partitionable devices
465 raise "PartitionObjectError", message
466
467
468def detect_devices(): 648def detect_devices():
469 "Returns a list of partitionable devices on the system"
470
471 devices = [] 649 devices = []
472 650
473 # Make sure sysfs exists 651 # Make sure sysfs exists
652 # TODO: rewrite for 2.4 support
474 if not os.path.exists("/sys/bus"): 653 if not os.path.exists("/sys/bus"):
475 raise Exception, "no sysfs found (you MUST use a kernel >2.6)" 654 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "no sysfs found (you MUST use a kernel >2.6)")
476 # Make sure /proc/partitions exists 655 # Make sure /proc/partitions exists
477 if not os.path.exists("/proc/partitions"): 656 if not os.path.exists("/proc/partitions"):
478 raise Exception, "/proc/partitions does not exist!" 657 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "/proc/partitions does not exist! Please make sure procfs is in your kernel and mounted!")
479 658
480 # Load /proc/partitions into the variable 'partitions' 659 # Load /proc/partitions into the variable 'partitions'
481 partitions = [] 660 partitions = []
482 for line in open("/proc/partitions"): 661 for line in open("/proc/partitions"):
483 if len(line.split()) < 4 or not line.split()[0].isdigit() or \ 662 if len(line.split()) < 4 or not line.split()[0].isdigit() or not line.split()[1].isdigit():
484 not line.split()[1].isdigit():
485 continue 663 continue
486 664
487 # Get the major, minor and device name 665 # Get the major, minor and device name
488 major = line.split()[0] 666 major = line.split()[0]
489 minor = line.split()[1] 667 minor = line.split()[1]
499 # all the devices in /dev to try and find a 677 # all the devices in /dev to try and find a
500 # devices with the same major and minor 678 # devices with the same major and minor
501 if not os.path.exists(device): 679 if not os.path.exists(device):
502 device = None 680 device = None
503 for path, dirs, files in os.walk("/dev"): 681 for path, dirs, files in os.walk("/dev"):
504 for file in files: 682 for d_file in files:
505 full_file = os.path.join(path, file) 683 full_file = os.path.join(path, d_file)
506 if not os.path.exists(full_file): 684 if not os.path.exists(full_file):
507 continue 685 continue
508 statres = os.stat(full_file) 686 statres = os.stat(full_file)
509 fmaj = os.major(statres.st_rdev) 687 fmaj = os.major(statres.st_rdev)
510 fmin = os.minor(statres.st_rdev) 688 fmin = os.minor(statres.st_rdev)
516 694
517 partitions.append(( major, minor, device )) 695 partitions.append(( major, minor, device ))
518 696
519 # Scan sysfs for the devices of type 'x' 697 # Scan sysfs for the devices of type 'x'
520 # 'x' being a member of the list below: 698 # 'x' being a member of the list below:
699 # TODO: rewrite for 2.4 support
521 for dev_type in [ "ide", "scsi" ]: # Other device types? usb? fw? 700 for dev_type in [ "ide", "scsi" ]: # Other device types? usb? fw?
522 if os.path.exists("/sys/bus/" + dev_type): 701 if os.path.exists("/sys/bus/" + dev_type):
523 sysfs_devices = os.listdir("/sys/bus/"+dev_type+"/devices") 702 sysfs_devices = os.listdir("/sys/bus/"+dev_type+"/devices")
524 703
525 # For each device in the devices on that bus 704 # For each device in the devices on that bus
526 for sysfs_device in sysfs_devices: 705 for sysfs_device in sysfs_devices:
527 dev_file = "/sys/bus/" + dev_type + "/devices/"\ 706 dev_file = "/sys/bus/" + dev_type + "/devices/" + sysfs_device + "/block/dev"
528 + sysfs_device + "/block/dev"
529 707
530 # If the file is not a block device, loop 708 # If the file is not a block device, loop
531 if not os.path.exists(dev_file): 709 if not os.path.exists(dev_file):
532 continue 710 continue
533 711
535 try: 713 try:
536 major, minor = open(dev_file).read().split(":") 714 major, minor = open(dev_file).read().split(":")
537 major = int(major) 715 major = int(major)
538 minor = int(minor) 716 minor = int(minor)
539 except: 717 except:
540 raise Exception, "invalid major minor in "\ 718 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "invalid major minor in " + dev_file)
541 + dev_file
542 719
543 # Find a device listed in /proc/partitions 720 # Find a device listed in /proc/partitions
544 # that has the same minor and major as our 721 # that has the same minor and major as our
545 # current block device. 722 # current block device.
546 for record in partitions: 723 for record in partitions:
547 if major == record[0] and minor == record[1]: 724 if major == record[0] and minor == record[1]:
548 devices.append(record[2]) 725 devices.append(record[2])
549 726
727 # For testing the partitioning code
728 if GLIUtility.is_file("/tmp/disk.img"):
729 devices.append("/tmp/disk.img")
730
550 # We have assembled the list of devices, so return it 731 # We have assembled the list of devices, so return it
551 return devices 732 return devices

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