/[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
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 physical_memory = int(GLIUtility.spawn(r"free -m | egrep '^Mem:' | sed -e 's/^Mem: \+//' -e 's/ \+.\+$//'", return_output=True)[1].strip())
127 parts = self.get_ordered_partition_list()
128 for part in parts:
129 if self._partitions[part].get_type() == "free" and self._partitions[part].get_mb() >= 4096:
130 free_minor = part
131 break
132 if not free_minor:
133 raise GLIException("RecommendedPartitionLayoutError", "notice", "do_recommended", "You do not have atleast 4GB of concurrent unallocated space. Please remove some partitions and try again.")
134 remaining_free = self._partitions[free_minor].get_mb()
135 for newpart in recommended_parts:
136 if archinfo[self._arch]['extended'] and free_minor == (3 + FREE_MINOR_FRAC_PRI) and not newpart == recommended_parts[-1]:
137 if self.get_extended_partition():
138 raise GLIException("RecommendedPartitionLayoutError", "notice", "do_recommended", "This code is not yet robust enough to handle automatic partitioning with your current layout.")
139 to_create.append({ 'type': "extended", 'size': remaining_free, 'mountpoint': "", 'free_minor': free_minor })
140 free_minor = 4 + FREE_MINOR_FRAC_LOG
141 newpart['free_minor'] = free_minor
142 if newpart['type'] == "linux-swap" and physical_memory and physical_memory < 1024:
143 newpart['size'] = physical_memory * 2
144 to_create.append(newpart)
145 free_minor = free_minor + 1
146 if not newpart['size'] == "*":
147 remaining_free = remaining_free - newpart['size']
148 for newpart in to_create:
149 if newpart['size'] == "*":
150 newpart['size'] = self._partitions[newpart['free_minor']].get_mb()
151 self.add_partition(newpart['free_minor'], newpart['size'], 0, 0, newpart['type'], mountpoint=newpart['mountpoint'])
152
153 ##
154 # Combines free space and closes gaps in minor numbers. This is used internally
76 def clear_partitions(self): 155 def tidy_partitions(self):
77 self._partitions = {} 156 last_minor = 0
157 last_log_minor = 4
158 last_free = 0
159 last_log_free = 0
160 parts = self._partitions.keys()
161 parts.sort()
162 for part in parts:
163 if archinfo[self._arch]['extended'] and part > 4: break
164 tmppart = self._partitions[part]
165 if tmppart.get_type() == "extended":
166 for part_log in parts:
167 if part_log < (4 + FREE_MINOR_FRAC_LOG): continue
168 tmppart_log = self._partitions[part_log]
169 if tmppart_log.get_type() == "free":
170 if last_log_minor < last_log_free:
171 self._partitions[last_log_free].set_mb(self._partitions[last_log_free].get_mb()+tmppart_log.get_mb())
172 del self._partitions[part_log]
173 else:
174 if not last_log_free:
175 last_log_free = last_log_minor + FREE_MINOR_FRAC_LOG
176 else:
177 last_log_free = part_log
178 tmppart_log.set_minor(last_log_free)
179 self._partitions[last_log_free] = tmppart_log
180 if part_log != last_log_free: del self._partitions[part_log]
181 else:
182 if part_log > (last_log_minor + 1):
183 tmppart_log.set_minor(last_log_minor + 1)
184 last_log_minor = last_log_minor + 1
185 self._partitions[last_log_minor] = tmppart_log
186 del self._partitions[part_log]
187 else:
188 last_log_minor = part_log
189 elif tmppart.get_type() == "free":
190 if last_minor < last_free:
191 self._partitions[last_free].set_mb(self._partitions[last_free].get_mb()+tmppart.get_mb())
192 del self._partitions[part]
193 else:
194 if not last_free:
195 last_free = last_minor + FREE_MINOR_FRAC_PRI
196 else:
197 last_free = part
198 tmppart.set_minor(last_free)
199 self._partitions[last_free] = tmppart
200 if part != last_free: del self._partitions[part]
201 else:
202 if part > (last_minor + 1):
203 tmppart.set_minor(last_minor + 1)
204 last_minor = last_minor + 1
205 self._partitions[last_minor] = tmppart
206 del self._partitions[part]
207 else:
208 last_minor = part
78 209
210 ##
211 # Adds a new partition to the partition info
212 # @param free_minor minor of unallocated space partition is being created in
213 # @param mb size of partition in MB
214 # @param start Start sector (only used for existing partitions)
215 # @param end End sector (only used for existing partitions)
216 # @param type Partition type (ext2, ext3, fat32, linux-swap, free, extended, etc.)
217 # @param mountpoint='' Partition mountpoint
218 # @param mountopts='' Partition mount options
219 # @param mkfsopts='' Additional mkfs options
79 def add_partition(self, minor, start, end, type, mountpoint='', mountopts=''): 220 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) 221 new_minor = int(free_minor) + 1
82 if not free_end:
83 return False
84 if self._partitions.has_key(minor): 222 if self._partitions.has_key(new_minor):
85 parts = self._partitions.keys() 223 parts = self._partitions.keys()
86 parts.sort() 224 parts.sort()
87 parts.reverse() 225 parts.reverse()
88 hole_at = 0 226 hole_at = 0
89 for i in range(1, parts[0]+1): 227 for i in range(1, parts[0]+1):
90 if i <= minor: continue 228 if i <= new_minor: continue
91 if not self._partitions.has_key(int(i)): 229 if not self._partitions.has_key(i):
92 hole_at = i 230 hole_at = i
93 break 231 break
94 stopscooting = 0 232 stopscooting = 0
95 for i in parts: 233 for i in parts:
96 if stopscooting: break 234 if stopscooting: break
97 if (i >= hole_at) and (hole_at): continue 235 if i >= hole_at and hole_at: continue
98 if i >= minor: 236 if i >= new_minor:
99 self._partitions[i].set_minor(i+1) 237 self._partitions[i].set_minor(i+1)
100 self._partitions[i+1] = self._partitions[i] 238 self._partitions[i+1] = self._partitions[i]
101 if i == minor: stopscooting = 1 239 if i == new_minor: stopscooting = 1
240 if mb != self._partitions[free_minor].get_mb():
241 old_free_mb = self._partitions[free_minor].get_mb()
242 del self._partitions[free_minor]
243 if archinfo[self._arch]['extended'] and new_minor >= 5:
244 free_minor = new_minor + FREE_MINOR_FRAC_LOG
245 else:
246 free_minor = new_minor + FREE_MINOR_FRAC_PRI
247 self._partitions[free_minor] = Partition(self, free_minor, old_free_mb-mb, 0, 0, "free")
248 else:
249 del self._partitions[free_minor]
102 self._partitions[minor] = Partition(self, minor, '', start, end, 0, type, mountpoint=mountpoint, mountopts=mountopts) 250 self._partitions[new_minor] = Partition(self, new_minor, mb, start, end, type, mountpoint=mountpoint, mountopts=mountopts,mkfsopts=mkfsopts)
251 if type == "extended":
252 self._partitions[4 + FREE_MINOR_FRAC_LOG] = Partition(self, (4 + FREE_MINOR_FRAC_LOG), mb, 0, 0, "free")
253 self.tidy_partitions()
103 254
255 ##
256 # Removes partition from partition info
257 # @param minor Minor of partition to remove
104 def remove_partition(self, minor): 258 def remove_partition(self, minor):
259 tmppart = self._partitions[int(minor)]
260 free_minor = 0
261 if tmppart.is_logical():
262 free_minor = int(minor-1)+FREE_MINOR_FRAC_LOG
263 else:
264 free_minor = int(minor-1)+FREE_MINOR_FRAC_PRI
265 if free_minor in self._partitions:
266 self._partitions[free_minor].set_mb(self._partitions[free_minor].get_mb() + tmppart.get_mb())
267 else:
268 self._partitions[free_minor] = Partition(self, free_minor, tmppart.get_mb(), 0, 0, "free", format=False, existing=False)
105 del self._partitions[int(minor)] 269 del self._partitions[int(minor)]
270 self.tidy_partitions()
106 271
107 def get_free_space(self, start): 272 ##
108 GAP_SIZE = 100 273 # This function clears the partition table
274 def clear_partitions(self):
275# parts = self._partitions.keys()
276# parts.sort()
277# parts.reverse()
278# for part in parts:
279# if not self._partitions[part].get_type() == "free":
280# self.remove_partition(part)
281 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) }
282
283 ##
284 # Returns an ordered list (disk order) of partition minors
285 def get_ordered_partition_list(self):
109 parts = self._partitions.keys() 286 parts = self._partitions.keys()
110 parts.sort() 287 parts.sort()
111 lastend_pri = 0 288 partlist = []
112 lastend_log = 0 289 tmppart = None
113 free_start = -1
114 free_end = -1
115 if start > self._total_sectors: return (-1, -1)
116 for part in parts: 290 for part in parts:
117 if part > 4: break 291 if archinfo[self._arch]['extended'] and part > (4 + FREE_MINOR_FRAC_PRI): break
118 tmppart = self._partitions[part] 292 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) 293 partlist.append(part)
198 if tmppart.is_extended(): 294 if tmppart.is_extended():
199 for part_log in parts: 295 for part_log in parts:
200 if part_log < 5: continue 296 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) 297 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 298 return partlist
213 299
300 ##
301 # Returns partition info in a format suitable for passing to install_profile.set_partition_tables()
214 def get_install_profile_structure(self): 302 def get_install_profile_structure(self):
215 devdic = {} 303 devdic = {}
216 for part in self._partitions: 304 for part in self._partitions:
217 tmppart = self._partitions[part] 305 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() } 306 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 307 return devdic
220 308
309 ##
310 # Returns the minor of the extended partition, if any
221 def get_extended_partition(self): 311 def get_extended_partition(self):
222 for part in self._partitions: 312 for part in self._partitions:
223 tmppart = self._partitions[part] 313 tmppart = self._partitions[part]
224 if tmppart.is_extended(): 314 if tmppart.is_extended():
225 return part 315 return part
226 return 0 316 return 0
227 317
318 ##
319 # Returns the drive model
320 def get_model(self):
321 return self._parted_dev.model
322
323 ##
324 # Sets the disklabel type
325 def set_disklabel(self, disklabel):
326 self._disklabel = disklabel
327
328 ##
329 # Returns the disklabel type
330 def get_disklabel(self):
331 return self._disklabel
332
333 ##
334 # Returns the number of sectors on the device
228 def get_num_sectors(self): 335 def get_num_sectors(self):
229 return int(self._total_sectors) 336 return long(self._total_sectors)
230 337
338 ##
339 # Returns the size of a cylinder in bytes
231 def get_cylinder_size(self): 340 def get_cylinder_size(self):
232 return int(self._cylinder_bytes) 341 return long(self._cylinder_bytes)
233 342
343 ##
344 # Returns the size of a sector in bytes
234 def get_sector_size(self): 345 def get_sector_size(self):
235 return int(self._sector_bytes) 346 return long(self._sector_bytes)
236 347
348 ##
349 # Returns the number of cylinders
237 def get_num_cylinders(self): 350 def get_num_cylinders(self):
238 return int(self._geometry['cylinders']) 351 return long(self._geometry['cylinders'])
239 352
353 ##
354 # Returns the total number of bytes on the device
240 def get_drive_bytes(self): 355 def get_drive_bytes(self):
241 return int(self._total_bytes) 356 return long(self._total_bytes)
242 357
358 ##
359 # Returns the total number of MB on the device
360 def get_total_mb(self):
361 return self._total_mb
362
363 ##
364 # Returns partition info dictionary
243 def get_partitions(self): 365 def get_partitions(self):
244 return self._partitions 366 return self._partitions
245 367
246 def print_partitions(self): 368 ##
247 for part in self._partitions.keys(): 369 # Prints disk geometry to STDOUT (no longer used)
248 print self._partitions[part].return_info()
249
250 def print_geometry(self): 370 def print_geometry(self):
251 print self._total_bytes, self._geometry 371 print self._total_bytes, self._geometry
252 372
253 def _error(self, message): 373##
254 "Raises an exception" 374# 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: 375class Partition:
282 "Class representing a single partition within a Device object" 376 "Class representing a single partition within a Device object"
283 377
284 _device = None 378 _device = None
285 _minor = None 379 _minor = 0
286 _bootflag = None 380 _orig_minor = 0
287 _start = None 381 _start = 0
288 _end = None 382 _end = 0
289 _blocks = None
290 _type = None 383 _type = None
291 _mountpoint = None 384 _mountpoint = None
292 _mountopts = None 385 _mountopts = None
293 _format = None 386 _format = None
294 _resizeable = None 387 _resizeable = None
295 _min_sectors_for_resize = 0 388 _min_mb_for_resize = 0
389 _mb = 0
390 _mkfsopts = None
296 391
392 ##
393 # Initialization function for the Partition class
394 # @param device Parent GLIStorageDevice object
395 # @param minor Minor of partition
396 # @param mb Parameter Size of partition in MB
397 # @param start Parameter Start sector of partition
398 # @param end Parameter Start sector of partition
399 # @param type Parameter Type of partition (ext2, ext3, fat32, linux-swap, free, extended, etc.)
400 # @param mountpoint='' Mountpoint of partition
401 # @param mountopts='' Mount options of partition
402 # @param mkfsopts='' Additional mkfs options
403 # @param format=True Format partition
404 # @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): 405 def __init__(self, device, minor, mb, start, end, type, mountpoint='', mountopts='', format=True, existing=False, origminor=0, mkfsopts=''):
298 self._device = device 406 self._device = device
299 self._minor = int(minor) 407 self._minor = float(minor)
300 self._bootflag = bootflag
301 self._start = int(start) 408 self._start = long(start)
302 self._end = int(end) 409 self._end = long(end)
303 self._blocks = int(blocks)
304 if type == "": type = "unknown" 410 self._type = type or "unknown"
305 self._type = type
306 self._mountpoint = mountpoint 411 self._mountpoint = mountpoint
307 self._mountopts = mountopts 412 self._mountopts = mountopts
308 self._format = format 413 self._format = format
309 if blocks == 0: 414 self._mb = mb
310 self._blocks = ((self._end - self._start) * self._device.get_cylinder_size()) / 512 415 self._orig_minor = origminor
416 self._mkfsopts = mkfsopts
417 if type != "free":
418 if existing and not origminor:
419 self._orig_minor = self._minor
420 self._minor = int(self._minor)
421 self._orig_minor = int(self._orig_minor)
311 if existing: 422 if existing:
423 try:
312 parted_part = device._parted_disk.get_partition(minor) 424 parted_part = device._parted_disk.get_partition(self._orig_minor)
425 label_type = device._parted_disk.type.name
426 if label_type == "loop":
427 dev_node = device._device
428 else:
429 dev_node = device._device + str(self._orig_minor)
430# print "dev_node = " + dev_node
313 if type == "ntfs": 431 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 .\+//'")) 432 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) + 1 433 self._min_mb_for_resize = long(min_bytes / MEGABYTE) + 1
316 self._resizeable == True 434 self._resizeable = True
317 elif type == "ext2" or type == "ext3": 435 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\+//'")) 436 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\+//'")) 437 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) 438 free_bytes = long(block_size * free_blocks)
321 free_sec = free_sec - 2000 # just to be safe 439 # 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 440 self._min_mb_for_resize = self._mb - long(free_bytes / MEGABYTE) + 50
323 self._resizeable == True 441 self._resizeable = True
324 else: 442 else:
325 parted_part = self._device._parted_disk.get_partition(self._minor) 443 parted_part = self._device._parted_disk.get_partition(int(self._orig_minor))
326 try:
327 parted_fs = parted_part.geom.file_system_open() 444 parted_fs = parted_part.geom.file_system_open()
328 except:
329 self._resizeable = False
330 return
331 resize_constraint = parted_fs.get_resize_constraint() 445 resize_constraint = parted_fs.get_resize_constraint()
332 min_size = resize_constraint.min_size 446 min_bytes = resize_constraint.min_size * self._device._sector_bytes
333 if int(min_size) != min_size: min_size = int(min_size) + 1 447 self._min_mb_for_resize = long(min_bytes / MEGABYTE) + 1
334 self._min_sectors_for_resize = min_size
335 self._resizeable = True 448 self._resizeable = True
449 except:
450 self._resizeable = False
336 451
452 ##
453 # Returns whether or not the partition is extended
337 def is_extended(self): 454 def is_extended(self):
338 if self._type == "extended": 455 if self._type == "extended":
339 return True 456 return True
340 else: 457 else:
341 return False 458 return False
342 459
460 ##
461 # Returns whether or not the partition is logical
343 def is_logical(self): 462 def is_logical(self):
344 part = self._device.get_partition_at(self._start, ignore_extended=0) 463 if self._type == "free":
345 if part and self._device._partitions[part].is_extended() and not part == self._minor: 464 if int(self._minor) + FREE_MINOR_FRAC_LOG == self._minor:
465 return True
466 else:
467 return False
468 elif archinfo[self._device._arch]['extended'] and self._minor > 4:
346 return True 469 return True
470 else:
347 return False 471 return False
348 472
473 ##
474 # Returns a list of logical partitions if this is an extended partition
349 def get_logicals(self): 475 def get_logicals(self):
350 if not self.is_extended(): 476 if not self.is_extended():
351 return None 477 return None
352 logicals = [] 478 logicals = []
353 start = self._start
354 parts = self._device._partitions.keys() 479 parts = self._device._partitions.keys()
355 parts.sort() 480 parts.sort()
356 for part in parts: 481 for part in parts:
357 if part < 5: continue 482 if part < 5: continue
358 logicals.append(part) 483 logicals.append(part)
359 logicals.sort() 484 logicals.sort()
360 return logicals 485 return logicals
361 486
487 ##
488 # Returns the extened parent partition if this is a logical partition (no longer used)
362 def get_extended_parent(self): 489 def get_extended_parent(self):
363 if not self.is_logical(): 490 if not self.is_logical():
364 return None 491 return None
365 else: 492 else:
366 return self._device.get_partition_at(self._start, ignore_extended=0) 493 return self._device.get_partition_at(self._start, ignore_extended=0)
367 494
495 ##
496 # Sets the options passed to mkfs
497 # @param mkfsopts Options passed to mkfs
498 def set_mkfsopts(self, mkfsopts):
499 self._mkfsopts = mkfsopts
500
501 ##
502 # Returns the options passes to mkfs
503 def get_mkfsopts(self):
504 return self._mkfsopts
505
506 ##
507 # Sets the start sector for the partition
508 # @param start Start sector
368 def set_start(self, start): 509 def set_start(self, start):
369 self._start = int(start) 510 self._start = long(start)
370 self._blocks = ((self._end - self._start) * self._device.get_cylinder_size()) / 512
371 511
512 ##
513 # Returns the start sector for the partition
372 def get_start(self): 514 def get_start(self):
373 return int(self._start) 515 return long(self._start)
374 516
517 ##
518 # Sets the end sector of the partition
519 # @param end End sector
375 def set_end(self, end): 520 def set_end(self, end):
376 self._end = int(end) 521 self._end = long(end)
377 self._blocks = ((self._end - self._start) * self._device.get_cylinder_size()) / 512
378 522
523 ##
524 # Returns end sector for the partition
379 def get_end(self): 525 def get_end(self):
380 return int(self._end) 526 return long(self._end)
381 527
528 ##
529 # Returns size of partition in MB
530 def get_mb(self):
531 return long(self._mb)
532
533 ##
534 # Sets size of partition in MB
535 # @param mb Parameter description
536 def set_mb(self, mb):
537 self._mb = long(mb)
538
539 ##
540 # Sets type of partition
541 # @param type Parameter description
382 def set_type(self, type): 542 def set_type(self, type):
383 self._type = type 543 self._type = type
384 544
545 ##
546 # Returns type of partition
385 def get_type(self): 547 def get_type(self):
386 return self._type 548 return self._type
387 549
550 ##
551 # Returns parent GLIStorageDevice object
388 def get_device(self): 552 def get_device(self):
389 return self._device 553 return self._device
390 554
555 ##
556 # Sets minor of partition
557 # @param minor New minor
391 def set_minor(self, minor): 558 def set_minor(self, minor):
392 self._minor = int(minor) 559 self._minor = float(minor)
393 560
561 ##
562 # Returns minor of partition
394 def get_minor(self): 563 def get_minor(self):
395 return int(self._minor) 564 return float(self._minor)
396 565
566 ##
567 # Sets the original minor of the partition
568 # @param orig_minor Parameter description
569 def set_orig_minor(self, orig_minor):
570 self._orig_minor = int(orig_minor)
571
572 ##
573 # Returns the original minor of the partition
574 def get_orig_minor(self):
575 return self._orig_minor
576
577 ##
578 # Sets the mountpoint for the partition
579 # @param mountpoint Mountpoint
397 def set_mountpoint(self, mountpoint): 580 def set_mountpoint(self, mountpoint):
398 self._mountpoint = mountpoint 581 self._mountpoint = mountpoint
399 582
583 ##
584 # Returns the mountpoint for the partition
400 def get_mountpoint(self): 585 def get_mountpoint(self):
401 return self._mountpoint 586 return self._mountpoint
402 587
588 ##
589 # Sets the mount options for the partition
590 # @param mountopts Mount options
403 def set_mountopts(self, mountopts): 591 def set_mountopts(self, mountopts):
404 self._mountopts = mountopts 592 self._mountopts = mountopts
405 593
594 ##
595 # Returns the mount options for the partition
406 def get_mountopts(self): 596 def get_mountopts(self):
407 return self._mountopts 597 return self._mountopts
408 598
599 ##
600 # Set whether to format the partition
601 # @param format Format this partition (True/False)
409 def set_format(self, format): 602 def set_format(self, format):
410 self._format = format 603 self._format = format
411 604
605 ##
606 # Returns whether to format the partition
412 def get_format(self): 607 def get_format(self):
413 return self._format 608 return self._format
414 609
415 def get_blocks(self): 610 ##
416 return int(self._blocks) 611 # Returns whether the partition is resizeable
612 def is_resizeable(self):
613 return self._resizeable
417 614
615 ##
616 # Returns minimum MB for resize
418 def get_min_sectors_for_resize(self): 617 def get_min_mb_for_resize(self):
419 if self.is_extended(): 618# if self.is_extended():
420 min_size = self._start 619# min_size = self._start
421 for part in self._device._partitions: 620# for part in self._device._partitions:
422 if part < 5: continue 621# if part < 5: continue
423 if part.get_end > min_size: min_size = part.get_end() 622# if part.get_end > min_size: min_size = part.get_end()
424 return min_size 623# return min_size
425 else: 624# else:
625 if self._resizeable:
426 return self._min_sectors_for_resize 626 return self._min_mb_for_resize
627 else:
628 return -1
427 629
630 ##
631 # Returns maximum MB for resize
428 def get_max_sectors_for_resize(self): 632 def get_max_mb_for_resize(self):
429 free_start, free_end = self._device.get_free_space(self._end) 633 if self._resizeable:
430 if free_end == -1: return self._end 634 free_minor = 0
431 if free_start - 1 == self._end:
432 if self.is_logical(): 635 if self.is_logical():
433 if free_end <= self._device._partitions[self.get_extended_parent()]._end: 636 free_minor = self._minor + FREE_MINOR_FRAC_LOG
434 return free_end - self._start
435 else:
436 return self._end - self._start
437 else: 637 else:
438 return free_end - self._start 638 free_minor = self._minor + FREE_MINOR_FRAC_PRI
639 if free_minor in self._device._partitions:
640 return self._mb + self._device._partitions[free_minor]._mb
641 else:
642 return self._mb
643 else:
644 return -1
439 645
646 ##
647 # Resizes the partition
648 # @param mb New size in MB
440 def resize(self, start, end): 649 def resize(self, mb):
441 part_at_start = self._device.get_partition_at(int(start)) 650 free_minor = self._minor
442 part_at_end = self._device.get_partition_at(int(end))
443 logicals = None
444 if self.is_logical(): 651 if self.is_logical():
445 parent = self.get_extended_parent() 652 free_minor += FREE_MINOR_FRAC_LOG
446 parentstart = int(self._device._partitions[parent].get_start()) 653 else:
447 parentend = int(self._device._partitions[parent].get_end()) 654 free_minor += FREE_MINOR_FRAC_PRI
448 if (start < parentstart) or (end > parentend): return 0 655 if mb < self._mb:
449 if self.is_extended(): 656 # Shrinking
450 logicals = self.get_logicals() 657 if not free_minor in self._device._partitions:
451 if len(logicals): 658 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() 659 self._device._partitions[free_minor]._mb += self._mb - mb
453 logicals_end = self._device._partitions[logicals[len(logicals)-1]].get_end() 660 self._mb = mb
454 if (start > logicals_start) or (end < logicals_end): return 0 661 elif mb == self._mb + self._device._partitions[free_minor]._mb:
455 if part_at_start in logicals: part_at_start = 0 662 # Using all available unallocated space
456 if part_at_end in logicals: part_at_end = 0 663 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)): 664 self._mb = mb
458 return 0 665 elif mb > self._mb:
459 self.set_start(start) 666 # Growing
460 self.set_end(end) 667 self._device._partitions[free_minor]._mb = mb - self._mb
461 return 1 668 self._mb = mb
462 669
463 def _error(self, message): 670##
464 "Raises an exception" 671# Returns a list of detected partitionable devices
465 raise "PartitionObjectError", message
466
467
468def detect_devices(): 672def detect_devices():
469 "Returns a list of partitionable devices on the system"
470
471 devices = [] 673 devices = []
472 674
473 # Make sure sysfs exists 675 # Make sure sysfs exists
676 # TODO: rewrite for 2.4 support
474 if not os.path.exists("/sys/bus"): 677 if not os.path.exists("/sys/bus"):
475 raise Exception, "no sysfs found (you MUST use a kernel >2.6)" 678 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "no sysfs found (you MUST use a kernel >2.6)")
476 # Make sure /proc/partitions exists 679 # Make sure /proc/partitions exists
477 if not os.path.exists("/proc/partitions"): 680 if not os.path.exists("/proc/partitions"):
478 raise Exception, "/proc/partitions does not exist!" 681 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "/proc/partitions does not exist! Please make sure procfs is in your kernel and mounted!")
479 682
480 # Load /proc/partitions into the variable 'partitions' 683 # Load /proc/partitions into the variable 'partitions'
481 partitions = [] 684 partitions = []
482 for line in open("/proc/partitions"): 685 for line in open("/proc/partitions"):
483 if len(line.split()) < 4 or not line.split()[0].isdigit() or \ 686 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 687 continue
486 688
487 # Get the major, minor and device name 689 # Get the major, minor and device name
488 major = line.split()[0] 690 major = line.split()[0]
489 minor = line.split()[1] 691 minor = line.split()[1]
499 # all the devices in /dev to try and find a 701 # all the devices in /dev to try and find a
500 # devices with the same major and minor 702 # devices with the same major and minor
501 if not os.path.exists(device): 703 if not os.path.exists(device):
502 device = None 704 device = None
503 for path, dirs, files in os.walk("/dev"): 705 for path, dirs, files in os.walk("/dev"):
504 for file in files: 706 for d_file in files:
505 full_file = os.path.join(path, file) 707 full_file = os.path.join(path, d_file)
506 if not os.path.exists(full_file): 708 if not os.path.exists(full_file):
507 continue 709 continue
508 statres = os.stat(full_file) 710 statres = os.stat(full_file)
509 fmaj = os.major(statres.st_rdev) 711 fmaj = os.major(statres.st_rdev)
510 fmin = os.minor(statres.st_rdev) 712 fmin = os.minor(statres.st_rdev)
516 718
517 partitions.append(( major, minor, device )) 719 partitions.append(( major, minor, device ))
518 720
519 # Scan sysfs for the devices of type 'x' 721 # Scan sysfs for the devices of type 'x'
520 # 'x' being a member of the list below: 722 # 'x' being a member of the list below:
723 # TODO: rewrite for 2.4 support
521 for dev_type in [ "ide", "scsi" ]: # Other device types? usb? fw? 724 for dev_type in [ "ide", "scsi" ]: # Other device types? usb? fw?
522 if os.path.exists("/sys/bus/" + dev_type): 725 if os.path.exists("/sys/bus/" + dev_type):
523 sysfs_devices = os.listdir("/sys/bus/"+dev_type+"/devices") 726 sysfs_devices = os.listdir("/sys/bus/"+dev_type+"/devices")
524 727
525 # For each device in the devices on that bus 728 # For each device in the devices on that bus
526 for sysfs_device in sysfs_devices: 729 for sysfs_device in sysfs_devices:
527 dev_file = "/sys/bus/" + dev_type + "/devices/"\ 730 dev_file = "/sys/bus/" + dev_type + "/devices/" + sysfs_device + "/block/dev"
528 + sysfs_device + "/block/dev"
529 731
530 # If the file is not a block device, loop 732 # If the file is not a block device, loop
531 if not os.path.exists(dev_file): 733 if not os.path.exists(dev_file):
532 continue 734 continue
533 735
535 try: 737 try:
536 major, minor = open(dev_file).read().split(":") 738 major, minor = open(dev_file).read().split(":")
537 major = int(major) 739 major = int(major)
538 minor = int(minor) 740 minor = int(minor)
539 except: 741 except:
540 raise Exception, "invalid major minor in "\ 742 raise GLIException("GLIStorageDeviceError", 'fatal', 'detect_devices', "invalid major minor in " + dev_file)
541 + dev_file
542 743
543 # Find a device listed in /proc/partitions 744 # Find a device listed in /proc/partitions
544 # that has the same minor and major as our 745 # that has the same minor and major as our
545 # current block device. 746 # current block device.
546 for record in partitions: 747 for record in partitions:
547 if major == record[0] and minor == record[1]: 748 if major == record[0] and minor == record[1]:
548 devices.append(record[2]) 749 devices.append(record[2])
549 750
751 # For testing the partitioning code
752 if GLIUtility.is_file("/tmp/disk.img"):
753 devices.append("/tmp/disk.img")
754
550 # We have assembled the list of devices, so return it 755 # We have assembled the list of devices, so return it
551 return devices 756 return devices

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