root / image_creator / image.py @ bf3a282c
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1 | f5174d2c | Nikos Skalkotos | # Copyright 2013 GRNET S.A. All rights reserved.
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2 | f5174d2c | Nikos Skalkotos | #
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3 | f5174d2c | Nikos Skalkotos | # Redistribution and use in source and binary forms, with or
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4 | f5174d2c | Nikos Skalkotos | # without modification, are permitted provided that the following
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5 | f5174d2c | Nikos Skalkotos | # conditions are met:
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6 | f5174d2c | Nikos Skalkotos | #
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7 | f5174d2c | Nikos Skalkotos | # 1. Redistributions of source code must retain the above
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8 | f5174d2c | Nikos Skalkotos | # copyright notice, this list of conditions and the following
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9 | f5174d2c | Nikos Skalkotos | # disclaimer.
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10 | f5174d2c | Nikos Skalkotos | #
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11 | f5174d2c | Nikos Skalkotos | # 2. Redistributions in binary form must reproduce the above
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12 | f5174d2c | Nikos Skalkotos | # copyright notice, this list of conditions and the following
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13 | f5174d2c | Nikos Skalkotos | # disclaimer in the documentation and/or other materials
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14 | f5174d2c | Nikos Skalkotos | # provided with the distribution.
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15 | f5174d2c | Nikos Skalkotos | #
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16 | f5174d2c | Nikos Skalkotos | # THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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17 | f5174d2c | Nikos Skalkotos | # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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18 | f5174d2c | Nikos Skalkotos | # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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19 | f5174d2c | Nikos Skalkotos | # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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20 | f5174d2c | Nikos Skalkotos | # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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21 | f5174d2c | Nikos Skalkotos | # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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22 | f5174d2c | Nikos Skalkotos | # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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23 | f5174d2c | Nikos Skalkotos | # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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24 | f5174d2c | Nikos Skalkotos | # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | f5174d2c | Nikos Skalkotos | # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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26 | f5174d2c | Nikos Skalkotos | # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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27 | f5174d2c | Nikos Skalkotos | # POSSIBILITY OF SUCH DAMAGE.
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28 | f5174d2c | Nikos Skalkotos | #
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29 | f5174d2c | Nikos Skalkotos | # The views and conclusions contained in the software and
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30 | f5174d2c | Nikos Skalkotos | # documentation are those of the authors and should not be
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31 | f5174d2c | Nikos Skalkotos | # interpreted as representing official policies, either expressed
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32 | f5174d2c | Nikos Skalkotos | # or implied, of GRNET S.A.
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33 | f5174d2c | Nikos Skalkotos | |
34 | f5174d2c | Nikos Skalkotos | from image_creator.util import FatalError |
35 | f5174d2c | Nikos Skalkotos | from image_creator.gpt import GPTPartitionTable |
36 | f5174d2c | Nikos Skalkotos | from image_creator.os_type import os_cls |
37 | f5174d2c | Nikos Skalkotos | |
38 | f5174d2c | Nikos Skalkotos | import re |
39 | f5174d2c | Nikos Skalkotos | import guestfs |
40 | f5174d2c | Nikos Skalkotos | from sendfile import sendfile |
41 | f5174d2c | Nikos Skalkotos | |
42 | f5174d2c | Nikos Skalkotos | |
43 | f5174d2c | Nikos Skalkotos | class Image(object): |
44 | f5174d2c | Nikos Skalkotos | """The instances of this class can create images out of block devices."""
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45 | f5174d2c | Nikos Skalkotos | |
46 | f5174d2c | Nikos Skalkotos | def __init__(self, device, output, bootable=True, meta={}): |
47 | 88f83027 | Nikos Skalkotos | """Create a new Image instance"""
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48 | f5174d2c | Nikos Skalkotos | |
49 | f5174d2c | Nikos Skalkotos | self.device = device
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50 | f5174d2c | Nikos Skalkotos | self.out = output
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51 | f5174d2c | Nikos Skalkotos | self.bootable = bootable
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52 | f5174d2c | Nikos Skalkotos | self.meta = meta
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53 | f5174d2c | Nikos Skalkotos | self.progress_bar = None |
54 | f5174d2c | Nikos Skalkotos | self.guestfs_device = None |
55 | f5174d2c | Nikos Skalkotos | self.size = 0 |
56 | f5174d2c | Nikos Skalkotos | self.mounted = False |
57 | 29fd973e | Nikos Skalkotos | self.mounted_ro = False |
58 | f5174d2c | Nikos Skalkotos | |
59 | f5174d2c | Nikos Skalkotos | self.g = guestfs.GuestFS()
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60 | f5174d2c | Nikos Skalkotos | self.g.add_drive_opts(self.device, readonly=0, format="raw") |
61 | f5174d2c | Nikos Skalkotos | |
62 | f5174d2c | Nikos Skalkotos | # Before version 1.17.14 the recovery process, which is a fork of the
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63 | f5174d2c | Nikos Skalkotos | # original process that called libguestfs, did not close its inherited
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64 | f5174d2c | Nikos Skalkotos | # file descriptors. This can cause problems especially if the parent
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65 | f5174d2c | Nikos Skalkotos | # process has opened pipes. Since the recovery process is an optional
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66 | f5174d2c | Nikos Skalkotos | # feature of libguestfs, it's better to disable it.
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67 | f5174d2c | Nikos Skalkotos | self.g.set_recovery_proc(0) |
68 | f5174d2c | Nikos Skalkotos | version = self.g.version()
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69 | f5174d2c | Nikos Skalkotos | if version['major'] > 1 or \ |
70 | f5174d2c | Nikos Skalkotos | (version['major'] == 1 and (version['minor'] >= 18 or |
71 | f5174d2c | Nikos Skalkotos | (version['minor'] == 17 and |
72 | f5174d2c | Nikos Skalkotos | version['release'] >= 14))): |
73 | f5174d2c | Nikos Skalkotos | self.g.set_recovery_proc(1) |
74 | f5174d2c | Nikos Skalkotos | self.out.output("Enabling recovery proc") |
75 | f5174d2c | Nikos Skalkotos | |
76 | f5174d2c | Nikos Skalkotos | #self.g.set_trace(1)
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77 | f5174d2c | Nikos Skalkotos | #self.g.set_verbose(1)
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78 | f5174d2c | Nikos Skalkotos | |
79 | f5174d2c | Nikos Skalkotos | self.guestfs_enabled = False |
80 | f5174d2c | Nikos Skalkotos | |
81 | f5174d2c | Nikos Skalkotos | def enable(self): |
82 | 88f83027 | Nikos Skalkotos | """Enable a newly created Image instance"""
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83 | f5174d2c | Nikos Skalkotos | |
84 | f5174d2c | Nikos Skalkotos | self.out.output('Launching helper VM (may take a while) ...', False) |
85 | f5174d2c | Nikos Skalkotos | # self.progressbar = self.out.Progress(100, "Launching helper VM",
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86 | f5174d2c | Nikos Skalkotos | # "percent")
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87 | f5174d2c | Nikos Skalkotos | # eh = self.g.set_event_callback(self.progress_callback,
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88 | f5174d2c | Nikos Skalkotos | # guestfs.EVENT_PROGRESS)
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89 | f5174d2c | Nikos Skalkotos | self.g.launch()
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90 | f5174d2c | Nikos Skalkotos | self.guestfs_enabled = True |
91 | f5174d2c | Nikos Skalkotos | # self.g.delete_event_callback(eh)
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92 | f5174d2c | Nikos Skalkotos | # self.progressbar.success('done')
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93 | f5174d2c | Nikos Skalkotos | # self.progressbar = None
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94 | f5174d2c | Nikos Skalkotos | self.out.success('done') |
95 | f5174d2c | Nikos Skalkotos | |
96 | f5174d2c | Nikos Skalkotos | self.out.output('Inspecting Operating System ...', False) |
97 | f5174d2c | Nikos Skalkotos | roots = self.g.inspect_os()
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98 | f5174d2c | Nikos Skalkotos | if len(roots) == 0: |
99 | f5174d2c | Nikos Skalkotos | raise FatalError("No operating system found") |
100 | f5174d2c | Nikos Skalkotos | if len(roots) > 1: |
101 | f5174d2c | Nikos Skalkotos | raise FatalError("Multiple operating systems found." |
102 | f5174d2c | Nikos Skalkotos | "We only support images with one OS.")
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103 | f5174d2c | Nikos Skalkotos | self.root = roots[0] |
104 | f5174d2c | Nikos Skalkotos | self.guestfs_device = self.g.part_to_dev(self.root) |
105 | f5174d2c | Nikos Skalkotos | self.size = self.g.blockdev_getsize64(self.guestfs_device) |
106 | f5174d2c | Nikos Skalkotos | self.meta['PARTITION_TABLE'] = \ |
107 | f5174d2c | Nikos Skalkotos | self.g.part_get_parttype(self.guestfs_device) |
108 | f5174d2c | Nikos Skalkotos | |
109 | f5174d2c | Nikos Skalkotos | self.ostype = self.g.inspect_get_type(self.root) |
110 | f5174d2c | Nikos Skalkotos | self.distro = self.g.inspect_get_distro(self.root) |
111 | 80411610 | Nikos Skalkotos | self.out.success(
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112 | 80411610 | Nikos Skalkotos | 'found a(n) %s system' %
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113 | 80411610 | Nikos Skalkotos | self.ostype if self.distro == "unknown" else self.distro) |
114 | f5174d2c | Nikos Skalkotos | |
115 | f5174d2c | Nikos Skalkotos | def _get_os(self): |
116 | 88f83027 | Nikos Skalkotos | """Return an OS class instance for this image"""
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117 | f5174d2c | Nikos Skalkotos | if hasattr(self, "_os"): |
118 | f5174d2c | Nikos Skalkotos | return self._os |
119 | f5174d2c | Nikos Skalkotos | |
120 | f5174d2c | Nikos Skalkotos | if not self.guestfs_enabled: |
121 | f5174d2c | Nikos Skalkotos | self.enable()
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122 | f5174d2c | Nikos Skalkotos | |
123 | f5174d2c | Nikos Skalkotos | if not self.mounted: |
124 | f5174d2c | Nikos Skalkotos | do_unmount = True
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125 | f5174d2c | Nikos Skalkotos | self.mount(readonly=True) |
126 | f5174d2c | Nikos Skalkotos | else:
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127 | f5174d2c | Nikos Skalkotos | do_unmount = False
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128 | f5174d2c | Nikos Skalkotos | |
129 | f5174d2c | Nikos Skalkotos | try:
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130 | f5174d2c | Nikos Skalkotos | cls = os_cls(self.distro, self.ostype) |
131 | f5174d2c | Nikos Skalkotos | self._os = cls(self.root, self.g, self.out) |
132 | f5174d2c | Nikos Skalkotos | |
133 | f5174d2c | Nikos Skalkotos | finally:
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134 | f5174d2c | Nikos Skalkotos | if do_unmount:
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135 | f5174d2c | Nikos Skalkotos | self.umount()
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136 | f5174d2c | Nikos Skalkotos | |
137 | f5174d2c | Nikos Skalkotos | return self._os |
138 | f5174d2c | Nikos Skalkotos | |
139 | f5174d2c | Nikos Skalkotos | os = property(_get_os)
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140 | f5174d2c | Nikos Skalkotos | |
141 | f5174d2c | Nikos Skalkotos | def destroy(self): |
142 | 88f83027 | Nikos Skalkotos | """Destroy this Image instance."""
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143 | f5174d2c | Nikos Skalkotos | |
144 | f5174d2c | Nikos Skalkotos | # In new guestfs versions, there is a handy shutdown method for this
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145 | f5174d2c | Nikos Skalkotos | try:
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146 | f5174d2c | Nikos Skalkotos | if self.guestfs_enabled: |
147 | f5174d2c | Nikos Skalkotos | self.g.umount_all()
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148 | f5174d2c | Nikos Skalkotos | self.g.sync()
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149 | f5174d2c | Nikos Skalkotos | finally:
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150 | f5174d2c | Nikos Skalkotos | # Close the guestfs handler if open
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151 | f5174d2c | Nikos Skalkotos | self.g.close()
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152 | f5174d2c | Nikos Skalkotos | |
153 | f5174d2c | Nikos Skalkotos | # def progress_callback(self, ev, eh, buf, array):
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154 | f5174d2c | Nikos Skalkotos | # position = array[2]
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155 | f5174d2c | Nikos Skalkotos | # total = array[3]
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156 | f5174d2c | Nikos Skalkotos | #
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157 | f5174d2c | Nikos Skalkotos | # self.progressbar.goto((position * 100) // total)
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158 | f5174d2c | Nikos Skalkotos | |
159 | f5174d2c | Nikos Skalkotos | def mount(self, readonly=False): |
160 | f5174d2c | Nikos Skalkotos | """Mount all disk partitions in a correct order."""
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161 | f5174d2c | Nikos Skalkotos | |
162 | 29fd973e | Nikos Skalkotos | msg = "Mounting the media%s ..." % (" read-only" if readonly else "") |
163 | 29fd973e | Nikos Skalkotos | self.out.output(msg, False) |
164 | 29fd973e | Nikos Skalkotos | |
165 | 29fd973e | Nikos Skalkotos | #If something goes wrong when mounting rw, remount the filesystem ro
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166 | 29fd973e | Nikos Skalkotos | remount_ro = False
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167 | 29fd973e | Nikos Skalkotos | rw_mpoints = ('/', '/etc', '/root', '/home', '/var') |
168 | f5174d2c | Nikos Skalkotos | |
169 | f5174d2c | Nikos Skalkotos | # Sort the keys to mount the fs in a correct order.
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170 | f5174d2c | Nikos Skalkotos | # / should be mounted befor /boot, etc
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171 | f5174d2c | Nikos Skalkotos | def compare(a, b): |
172 | f5174d2c | Nikos Skalkotos | if len(a[0]) > len(b[0]): |
173 | f5174d2c | Nikos Skalkotos | return 1 |
174 | f5174d2c | Nikos Skalkotos | elif len(a[0]) == len(b[0]): |
175 | f5174d2c | Nikos Skalkotos | return 0 |
176 | f5174d2c | Nikos Skalkotos | else:
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177 | f5174d2c | Nikos Skalkotos | return -1 |
178 | 29fd973e | Nikos Skalkotos | mps = self.g.inspect_get_mountpoints(self.root) |
179 | f5174d2c | Nikos Skalkotos | mps.sort(compare) |
180 | 29fd973e | Nikos Skalkotos | |
181 | 29fd973e | Nikos Skalkotos | mopts = 'ro' if readonly else 'rw' |
182 | f5174d2c | Nikos Skalkotos | for mp, dev in mps: |
183 | 29fd973e | Nikos Skalkotos | if self.ostype == 'freebsd': |
184 | 29fd973e | Nikos Skalkotos | # libguestfs can't handle correct freebsd partitions on GUID
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185 | 29fd973e | Nikos Skalkotos | # Partition Table. We have to do the translation to linux
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186 | 29fd973e | Nikos Skalkotos | # device names ourselves
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187 | 29fd973e | Nikos Skalkotos | m = re.match('^/dev/((?:ada)|(?:vtbd))(\d+)p(\d+)$', dev)
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188 | 29fd973e | Nikos Skalkotos | if m:
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189 | 29fd973e | Nikos Skalkotos | m2 = int(m.group(2)) |
190 | 29fd973e | Nikos Skalkotos | m3 = int(m.group(3)) |
191 | 29fd973e | Nikos Skalkotos | dev = '/dev/sd%c%d' % (chr(ord('a') + m2), m3) |
192 | f5174d2c | Nikos Skalkotos | try:
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193 | 29fd973e | Nikos Skalkotos | self.g.mount_options(mopts, dev, mp)
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194 | f5174d2c | Nikos Skalkotos | except RuntimeError as msg: |
195 | 29fd973e | Nikos Skalkotos | if self.ostype == 'freebsd': |
196 | 29fd973e | Nikos Skalkotos | freebsd_mopts = "ufstype=ufs2,%s" % mopts
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197 | 29fd973e | Nikos Skalkotos | try:
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198 | 29fd973e | Nikos Skalkotos | self.g.mount_vfs(freebsd_mopts, 'ufs', dev, mp) |
199 | 29fd973e | Nikos Skalkotos | except RuntimeError as msg: |
200 | 29fd973e | Nikos Skalkotos | if readonly is False and mp in rw_mpoints: |
201 | 29fd973e | Nikos Skalkotos | remount_ro = True
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202 | 29fd973e | Nikos Skalkotos | break
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203 | 29fd973e | Nikos Skalkotos | elif readonly is False and mp in rw_mpoints: |
204 | 29fd973e | Nikos Skalkotos | remount_ro = True
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205 | 29fd973e | Nikos Skalkotos | break
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206 | 29fd973e | Nikos Skalkotos | else:
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207 | 29fd973e | Nikos Skalkotos | self.out.warn("%s (ignored)" % msg) |
208 | 29fd973e | Nikos Skalkotos | if remount_ro:
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209 | 29fd973e | Nikos Skalkotos | self.out.warn("Unable to mount %s read-write. " |
210 | 29fd973e | Nikos Skalkotos | "Remounting everything read-only..." % mp)
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211 | 29fd973e | Nikos Skalkotos | self.umount()
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212 | 29fd973e | Nikos Skalkotos | self.mount(True) |
213 | 29fd973e | Nikos Skalkotos | else:
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214 | 29fd973e | Nikos Skalkotos | self.mounted = True |
215 | 29fd973e | Nikos Skalkotos | self.mounted_ro = readonly
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216 | 29fd973e | Nikos Skalkotos | self.out.success("done") |
217 | f5174d2c | Nikos Skalkotos | |
218 | f5174d2c | Nikos Skalkotos | def umount(self): |
219 | f5174d2c | Nikos Skalkotos | """Umount all mounted filesystems."""
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220 | f5174d2c | Nikos Skalkotos | self.g.umount_all()
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221 | f5174d2c | Nikos Skalkotos | self.mounted = False |
222 | f5174d2c | Nikos Skalkotos | |
223 | f5174d2c | Nikos Skalkotos | def _last_partition(self): |
224 | 88f83027 | Nikos Skalkotos | """Return the last partition of the image disk"""
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225 | f5174d2c | Nikos Skalkotos | if self.meta['PARTITION_TABLE'] not in 'msdos' 'gpt': |
226 | f5174d2c | Nikos Skalkotos | msg = "Unsupported partition table: %s. Only msdos and gpt " \
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227 | f5174d2c | Nikos Skalkotos | "partition tables are supported" % self.meta['PARTITION_TABLE'] |
228 | f5174d2c | Nikos Skalkotos | raise FatalError(msg)
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229 | f5174d2c | Nikos Skalkotos | |
230 | f5174d2c | Nikos Skalkotos | is_extended = lambda p: \
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231 | f5174d2c | Nikos Skalkotos | self.g.part_get_mbr_id(self.guestfs_device, p['part_num']) \ |
232 | f5174d2c | Nikos Skalkotos | in (0x5, 0xf) |
233 | f5174d2c | Nikos Skalkotos | is_logical = lambda p: \
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234 | f5174d2c | Nikos Skalkotos | self.meta['PARTITION_TABLE'] == 'msdos' and p['part_num'] > 4 |
235 | f5174d2c | Nikos Skalkotos | |
236 | f5174d2c | Nikos Skalkotos | partitions = self.g.part_list(self.guestfs_device) |
237 | f5174d2c | Nikos Skalkotos | last_partition = partitions[-1]
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238 | f5174d2c | Nikos Skalkotos | |
239 | f5174d2c | Nikos Skalkotos | if is_logical(last_partition):
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240 | f5174d2c | Nikos Skalkotos | # The disk contains extended and logical partitions....
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241 | f5174d2c | Nikos Skalkotos | extended = filter(is_extended, partitions)[0] |
242 | f5174d2c | Nikos Skalkotos | last_primary = [p for p in partitions if p['part_num'] <= 4][-1] |
243 | f5174d2c | Nikos Skalkotos | |
244 | f5174d2c | Nikos Skalkotos | # check if extended is the last primary partition
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245 | f5174d2c | Nikos Skalkotos | if last_primary['part_num'] > extended['part_num']: |
246 | f5174d2c | Nikos Skalkotos | last_partition = last_primary |
247 | f5174d2c | Nikos Skalkotos | |
248 | f5174d2c | Nikos Skalkotos | return last_partition
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249 | f5174d2c | Nikos Skalkotos | |
250 | f5174d2c | Nikos Skalkotos | def shrink(self): |
251 | 88f83027 | Nikos Skalkotos | """Shrink the image.
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252 | f5174d2c | Nikos Skalkotos |
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253 | 88f83027 | Nikos Skalkotos | This is accomplished by shrinking the last file system of the
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254 | 88f83027 | Nikos Skalkotos | image and then updating the partition table. The new disk size
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255 | f5174d2c | Nikos Skalkotos | (in bytes) is returned.
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256 | f5174d2c | Nikos Skalkotos |
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257 | f5174d2c | Nikos Skalkotos | ATTENTION: make sure unmount is called before shrink
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258 | f5174d2c | Nikos Skalkotos | """
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259 | f5174d2c | Nikos Skalkotos | get_fstype = lambda p: \
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260 | f5174d2c | Nikos Skalkotos | self.g.vfs_type("%s%d" % (self.guestfs_device, p['part_num'])) |
261 | f5174d2c | Nikos Skalkotos | is_logical = lambda p: \
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262 | f5174d2c | Nikos Skalkotos | self.meta['PARTITION_TABLE'] == 'msdos' and p['part_num'] > 4 |
263 | f5174d2c | Nikos Skalkotos | is_extended = lambda p: \
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264 | f5174d2c | Nikos Skalkotos | self.meta['PARTITION_TABLE'] == 'msdos' and \ |
265 | f5174d2c | Nikos Skalkotos | self.g.part_get_mbr_id(self.guestfs_device, p['part_num']) \ |
266 | f5174d2c | Nikos Skalkotos | in (0x5, 0xf) |
267 | f5174d2c | Nikos Skalkotos | |
268 | f5174d2c | Nikos Skalkotos | part_add = lambda ptype, start, stop: \
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269 | f5174d2c | Nikos Skalkotos | self.g.part_add(self.guestfs_device, ptype, start, stop) |
270 | f5174d2c | Nikos Skalkotos | part_del = lambda p: self.g.part_del(self.guestfs_device, p) |
271 | f5174d2c | Nikos Skalkotos | part_get_id = lambda p: self.g.part_get_mbr_id(self.guestfs_device, p) |
272 | f5174d2c | Nikos Skalkotos | part_set_id = lambda p, id: \ |
273 | f5174d2c | Nikos Skalkotos | self.g.part_set_mbr_id(self.guestfs_device, p, id) |
274 | f5174d2c | Nikos Skalkotos | part_get_bootable = lambda p: \
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275 | f5174d2c | Nikos Skalkotos | self.g.part_get_bootable(self.guestfs_device, p) |
276 | f5174d2c | Nikos Skalkotos | part_set_bootable = lambda p, bootable: \
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277 | f5174d2c | Nikos Skalkotos | self.g.part_set_bootable(self.guestfs_device, p, bootable) |
278 | f5174d2c | Nikos Skalkotos | |
279 | f5174d2c | Nikos Skalkotos | MB = 2 ** 20 |
280 | f5174d2c | Nikos Skalkotos | |
281 | f5174d2c | Nikos Skalkotos | self.out.output("Shrinking image (this may take a while) ...", False) |
282 | f5174d2c | Nikos Skalkotos | |
283 | f5174d2c | Nikos Skalkotos | sector_size = self.g.blockdev_getss(self.guestfs_device) |
284 | f5174d2c | Nikos Skalkotos | |
285 | f5174d2c | Nikos Skalkotos | last_part = None
|
286 | f5174d2c | Nikos Skalkotos | fstype = None
|
287 | f5174d2c | Nikos Skalkotos | while True: |
288 | f5174d2c | Nikos Skalkotos | last_part = self._last_partition()
|
289 | f5174d2c | Nikos Skalkotos | fstype = get_fstype(last_part) |
290 | f5174d2c | Nikos Skalkotos | |
291 | f5174d2c | Nikos Skalkotos | if fstype == 'swap': |
292 | f5174d2c | Nikos Skalkotos | self.meta['SWAP'] = "%d:%s" % \ |
293 | f5174d2c | Nikos Skalkotos | (last_part['part_num'],
|
294 | f5174d2c | Nikos Skalkotos | (last_part['part_size'] + MB - 1) // MB) |
295 | f5174d2c | Nikos Skalkotos | part_del(last_part['part_num'])
|
296 | f5174d2c | Nikos Skalkotos | continue
|
297 | f5174d2c | Nikos Skalkotos | elif is_extended(last_part):
|
298 | f5174d2c | Nikos Skalkotos | part_del(last_part['part_num'])
|
299 | f5174d2c | Nikos Skalkotos | continue
|
300 | f5174d2c | Nikos Skalkotos | |
301 | f5174d2c | Nikos Skalkotos | # Most disk manipulation programs leave 2048 sectors after the last
|
302 | f5174d2c | Nikos Skalkotos | # partition
|
303 | f5174d2c | Nikos Skalkotos | new_size = last_part['part_end'] + 1 + 2048 * sector_size |
304 | f5174d2c | Nikos Skalkotos | self.size = min(self.size, new_size) |
305 | f5174d2c | Nikos Skalkotos | break
|
306 | f5174d2c | Nikos Skalkotos | |
307 | f5174d2c | Nikos Skalkotos | if not re.match("ext[234]", fstype): |
308 | c71133ce | Nikos Skalkotos | self.out.warn("Don't know how to shrink %s partitions." % fstype) |
309 | f5174d2c | Nikos Skalkotos | return self.size |
310 | f5174d2c | Nikos Skalkotos | |
311 | f5174d2c | Nikos Skalkotos | part_dev = "%s%d" % (self.guestfs_device, last_part['part_num']) |
312 | f5174d2c | Nikos Skalkotos | self.g.e2fsck_f(part_dev)
|
313 | f5174d2c | Nikos Skalkotos | self.g.resize2fs_M(part_dev)
|
314 | f5174d2c | Nikos Skalkotos | |
315 | f5174d2c | Nikos Skalkotos | out = self.g.tune2fs_l(part_dev)
|
316 | f5174d2c | Nikos Skalkotos | block_size = int(filter(lambda x: x[0] == 'Block size', out)[0][1]) |
317 | f5174d2c | Nikos Skalkotos | block_cnt = int(filter(lambda x: x[0] == 'Block count', out)[0][1]) |
318 | f5174d2c | Nikos Skalkotos | |
319 | f5174d2c | Nikos Skalkotos | start = last_part['part_start'] / sector_size
|
320 | f5174d2c | Nikos Skalkotos | end = start + (block_size * block_cnt) / sector_size - 1
|
321 | f5174d2c | Nikos Skalkotos | |
322 | f5174d2c | Nikos Skalkotos | if is_logical(last_part):
|
323 | f5174d2c | Nikos Skalkotos | partitions = self.g.part_list(self.guestfs_device) |
324 | f5174d2c | Nikos Skalkotos | |
325 | f5174d2c | Nikos Skalkotos | logical = [] # logical partitions
|
326 | f5174d2c | Nikos Skalkotos | for partition in partitions: |
327 | f5174d2c | Nikos Skalkotos | if partition['part_num'] < 4: |
328 | f5174d2c | Nikos Skalkotos | continue
|
329 | f5174d2c | Nikos Skalkotos | logical.append({ |
330 | f5174d2c | Nikos Skalkotos | 'num': partition['part_num'], |
331 | f5174d2c | Nikos Skalkotos | 'start': partition['part_start'] / sector_size, |
332 | f5174d2c | Nikos Skalkotos | 'end': partition['part_end'] / sector_size, |
333 | f5174d2c | Nikos Skalkotos | 'id': part_get_id(partition['part_num']), |
334 | f5174d2c | Nikos Skalkotos | 'bootable': part_get_bootable(partition['part_num']) |
335 | f5174d2c | Nikos Skalkotos | }) |
336 | f5174d2c | Nikos Skalkotos | |
337 | f5174d2c | Nikos Skalkotos | logical[-1]['end'] = end # new end after resize |
338 | f5174d2c | Nikos Skalkotos | |
339 | f5174d2c | Nikos Skalkotos | # Recreate the extended partition
|
340 | f5174d2c | Nikos Skalkotos | extended = filter(is_extended, partitions)[0] |
341 | f5174d2c | Nikos Skalkotos | part_del(extended['part_num'])
|
342 | f5174d2c | Nikos Skalkotos | part_add('e', extended['part_start'] / sector_size, end) |
343 | f5174d2c | Nikos Skalkotos | |
344 | f5174d2c | Nikos Skalkotos | # Create all the logical partitions back
|
345 | f5174d2c | Nikos Skalkotos | for l in logical: |
346 | f5174d2c | Nikos Skalkotos | part_add('l', l['start'], l['end']) |
347 | f5174d2c | Nikos Skalkotos | part_set_id(l['num'], l['id']) |
348 | f5174d2c | Nikos Skalkotos | part_set_bootable(l['num'], l['bootable']) |
349 | f5174d2c | Nikos Skalkotos | else:
|
350 | f5174d2c | Nikos Skalkotos | # Recreate the last partition
|
351 | f5174d2c | Nikos Skalkotos | if self.meta['PARTITION_TABLE'] == 'msdos': |
352 | f5174d2c | Nikos Skalkotos | last_part['id'] = part_get_id(last_part['part_num']) |
353 | f5174d2c | Nikos Skalkotos | |
354 | f5174d2c | Nikos Skalkotos | last_part['bootable'] = part_get_bootable(last_part['part_num']) |
355 | f5174d2c | Nikos Skalkotos | part_del(last_part['part_num'])
|
356 | f5174d2c | Nikos Skalkotos | part_add('p', start, end)
|
357 | f5174d2c | Nikos Skalkotos | part_set_bootable(last_part['part_num'], last_part['bootable']) |
358 | f5174d2c | Nikos Skalkotos | |
359 | f5174d2c | Nikos Skalkotos | if self.meta['PARTITION_TABLE'] == 'msdos': |
360 | f5174d2c | Nikos Skalkotos | part_set_id(last_part['part_num'], last_part['id']) |
361 | f5174d2c | Nikos Skalkotos | |
362 | f5174d2c | Nikos Skalkotos | new_size = (end + 1) * sector_size
|
363 | f5174d2c | Nikos Skalkotos | |
364 | f5174d2c | Nikos Skalkotos | assert (new_size <= self.size) |
365 | f5174d2c | Nikos Skalkotos | |
366 | f5174d2c | Nikos Skalkotos | if self.meta['PARTITION_TABLE'] == 'gpt': |
367 | f5174d2c | Nikos Skalkotos | ptable = GPTPartitionTable(self.device)
|
368 | f5174d2c | Nikos Skalkotos | self.size = ptable.shrink(new_size, self.size) |
369 | f5174d2c | Nikos Skalkotos | else:
|
370 | f5174d2c | Nikos Skalkotos | self.size = min(new_size + 2048 * sector_size, self.size) |
371 | f5174d2c | Nikos Skalkotos | |
372 | f5174d2c | Nikos Skalkotos | self.out.success("new size is %dMB" % ((self.size + MB - 1) // MB)) |
373 | f5174d2c | Nikos Skalkotos | |
374 | f5174d2c | Nikos Skalkotos | return self.size |
375 | f5174d2c | Nikos Skalkotos | |
376 | f5174d2c | Nikos Skalkotos | def dump(self, outfile): |
377 | 88f83027 | Nikos Skalkotos | """Dumps the content of the image into a file.
|
378 | f5174d2c | Nikos Skalkotos |
|
379 | f5174d2c | Nikos Skalkotos | This method will only dump the actual payload, found by reading the
|
380 | f5174d2c | Nikos Skalkotos | partition table. Empty space in the end of the device will be ignored.
|
381 | f5174d2c | Nikos Skalkotos | """
|
382 | f5174d2c | Nikos Skalkotos | MB = 2 ** 20 |
383 | f5174d2c | Nikos Skalkotos | blocksize = 4 * MB # 4MB |
384 | f5174d2c | Nikos Skalkotos | size = self.size
|
385 | f5174d2c | Nikos Skalkotos | progr_size = (size + MB - 1) // MB # in MB |
386 | f5174d2c | Nikos Skalkotos | progressbar = self.out.Progress(progr_size, "Dumping image file", 'mb') |
387 | f5174d2c | Nikos Skalkotos | |
388 | f5174d2c | Nikos Skalkotos | with open(self.device, 'r') as src: |
389 | f5174d2c | Nikos Skalkotos | with open(outfile, "w") as dst: |
390 | f5174d2c | Nikos Skalkotos | left = size |
391 | f5174d2c | Nikos Skalkotos | offset = 0
|
392 | f5174d2c | Nikos Skalkotos | progressbar.next() |
393 | f5174d2c | Nikos Skalkotos | while left > 0: |
394 | f5174d2c | Nikos Skalkotos | length = min(left, blocksize)
|
395 | f5174d2c | Nikos Skalkotos | sent = sendfile(dst.fileno(), src.fileno(), offset, length) |
396 | f5174d2c | Nikos Skalkotos | |
397 | f5174d2c | Nikos Skalkotos | # Workaround for python-sendfile API change. In
|
398 | f5174d2c | Nikos Skalkotos | # python-sendfile 1.2.x (py-sendfile) the returning value
|
399 | f5174d2c | Nikos Skalkotos | # of sendfile is a tuple, where in version 2.x (pysendfile)
|
400 | f5174d2c | Nikos Skalkotos | # it is just a sigle integer.
|
401 | f5174d2c | Nikos Skalkotos | if isinstance(sent, tuple): |
402 | f5174d2c | Nikos Skalkotos | sent = sent[1]
|
403 | f5174d2c | Nikos Skalkotos | |
404 | f5174d2c | Nikos Skalkotos | offset += sent |
405 | f5174d2c | Nikos Skalkotos | left -= sent |
406 | f5174d2c | Nikos Skalkotos | progressbar.goto((size - left) // MB) |
407 | f5174d2c | Nikos Skalkotos | progressbar.success('image file %s was successfully created' % outfile)
|
408 | f5174d2c | Nikos Skalkotos | |
409 | f5174d2c | Nikos Skalkotos | # vim: set sta sts=4 shiftwidth=4 sw=4 et ai : |