summaryrefslogtreecommitdiff
path: root/lib/chef/provider/mount/solaris.rb
blob: f97cc1e6f7d5ae7d6e3632c400ec4e183ab81486 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
# Encoding: utf-8
# Author:: Hugo Fichter
# Author:: Lamont Granquist (<lamont@getchef.com>)
# Author:: Joshua Timberman (<joshua@getchef.com>)
# Copyright:: Copyright 2009-2016, Chef Software, Inc
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

require "chef/provider/mount"
require "chef/log"
require "forwardable"

class Chef
  class Provider
    class Mount
      # Mount Solaris File systems
      class Solaris < Chef::Provider::Mount
        provides :mount, platform: %w{openindiana opensolaris nexentacore omnios solaris2 smartos}

        extend Forwardable

        VFSTAB = "/etc/vfstab".freeze

        def_delegator :@new_resource, :device, :device
        def_delegator :@new_resource, :device_type, :device_type
        def_delegator :@new_resource, :dump, :dump
        def_delegator :@new_resource, :fsck_device, :fsck_device
        def_delegator :@new_resource, :fstype, :fstype
        def_delegator :@new_resource, :mount_point, :mount_point
        def_delegator :@new_resource, :options, :options
        def_delegator :@new_resource, :pass, :pass

        def load_current_resource
          @current_resource = Chef::Resource::Mount.new(new_resource.name)
          current_resource.mount_point(mount_point)
          current_resource.device(device)
          current_resource.fsck_device(fsck_device)
          current_resource.device_type(device_type)
          update_current_resource_state
        end

        def define_resource_requirements
          requirements.assert(:mount, :remount) do |a|
            a.assertion { !device_should_exist? || ::File.exist?(device) }
            a.failure_message(Chef::Exceptions::Mount, "Device #{device} does not exist")
            a.whyrun("Assuming device #{device} would have been created")
          end

          unless fsck_device == "-"
            requirements.assert(:mount, :remount) do |a|
              a.assertion { ::File.exist?(fsck_device) }
              a.failure_message(Chef::Exceptions::Mount, "Device #{fsck_device} does not exist")
              a.whyrun("Assuming device #{fsck_device} would have been created")
            end
          end

          requirements.assert(:mount, :remount) do |a|
            a.assertion { ::File.exist?(mount_point) }
            a.failure_message(Chef::Exceptions::Mount, "Mount point #{mount_point} does not exist")
            a.whyrun("Assuming mount point #{mount_point} would have been created")
          end
        end

        def mount_fs
          actual_options = options || []
          actual_options.delete("noauto")
          command = "mount -F #{fstype}"
          command << " -o #{actual_options.join(',')}" unless actual_options.empty?
          command << " #{device} #{mount_point}"
          shell_out!(command)
        end

        def umount_fs
          shell_out!("umount #{mount_point}")
        end

        def remount_fs
          # FIXME: Should remount always do the remount or only if the options change?
          actual_options = options || []
          actual_options.delete("noauto")
          mount_options = actual_options.empty? ? "" : ",#{actual_options.join(',')}"
          shell_out!("mount -o remount#{mount_options} #{mount_point}")
        end

        def enable_fs
          unless mount_options_unchanged?
            # we are enabling because our options have changed, so disable first then re-enable.
            # XXX: this should be refactored to be the responsibility of the caller
            disable_fs if current_resource.enabled
          end

          vfstab_write(merge_vfstab_entry)
        end

        def disable_fs
          contents, found = delete_vfstab_entry

          if found
            vfstab_write(contents.reverse)
          else
            # this is likely some kind of internal error, since we should only call disable_fs when there
            # the filesystem we want to disable is enabled.
            Chef::Log.warn("#{new_resource} did not find the mountpoint to disable in the vfstab")
          end
        end

        def etc_tempfile
          yield Tempfile.open("vfstab", "/etc")
        end

        def mount_options_unchanged?
          new_options = options_remove_noauto(options)
          current_options = options_remove_noauto(current_resource.nil? ? nil : current_resource.options)

          current_resource.fsck_device == fsck_device &&
            current_resource.fstype == fstype &&
            current_options == new_options &&
            current_resource.dump == dump &&
            current_resource.pass == pass &&
            current_resource.options.include?("noauto") == !mount_at_boot?
        end

        def update_current_resource_state
          current_resource.mounted(mounted?)
          (enabled, fstype, options, pass) = read_vfstab_status
          current_resource.enabled(enabled)
          current_resource.fstype(fstype)
          current_resource.options(options)
          current_resource.pass(pass)
        end

        def enabled?
          read_vfstab_status[0]
        end

        # Check for the device in mounttab.
        # <device> on <mountpoint> type <fstype> <options> on <date>
        # /dev/dsk/c1t0d0s0 on / type ufs read/write/setuid/devices/intr/largefiles/logging/xattr/onerror=panic/dev=700040 on Tue May  1 11:33:55 2012
        def mounted?
          mounted = false
          shell_out!("mount -v").stdout.each_line do |line|
            case line
            when /^#{device_regex}\s+on\s+#{Regexp.escape(mount_point)}\s+/
              Chef::Log.debug("Special device #{device} is mounted as #{mount_point}")
              mounted = true
            when /^([\/\w]+)\son\s#{Regexp.escape(mount_point)}\s+/
              Chef::Log.debug("Special device #{Regexp.last_match[1]} is mounted as #{mount_point}")
              mounted = false
            end
          end
          mounted
        end

        private

        def read_vfstab_status
          # Check to see if there is an entry in /etc/vfstab. Last entry for a volume wins.
          enabled = false
          fstype = options = pass = nil
          ::File.foreach(VFSTAB) do |line|
            case line
            when /^[#\s]/
              next
              # solaris /etc/vfstab format:
              # device         device          mount           FS      fsck    mount   mount
              # to mount       to fsck         point           type    pass    at boot options
            when /^#{device_regex}\s+[-\/\w]+\s+#{Regexp.escape(mount_point)}\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)/
              enabled = true
              fstype = Regexp.last_match[1]
              options = Regexp.last_match[4]
              # Store the 'mount at boot' column from vfstab as the 'noauto' option
              # in current_resource.options (linux style)
              if Regexp.last_match[3] == "no"
                if options.nil? || options.empty?
                  options = "noauto"
                else
                  options += ",noauto"
                end
              end
              pass = (Regexp.last_match[2] == "-") ? 0 : Regexp.last_match[2].to_i
              Chef::Log.debug("Found mount #{device} to #{mount_point} in #{VFSTAB}")
              next
            when /^[-\/\w]+\s+[-\/\w]+\s+#{Regexp.escape(mount_point)}\s+/
              # if we find a mountpoint on top of our mountpoint, then we are not enabled
              enabled = false
              Chef::Log.debug("Found conflicting mount point #{mount_point} in #{VFSTAB}")
            end
          end
          [enabled, fstype, options, pass]
        end

        def device_should_exist?
          !%w{tmpfs nfs ctfs proc mntfs objfs sharefs fd smbfs vxfs}.include?(fstype)
        end

        def mount_at_boot?
          options.nil? || !options.include?("noauto")
        end

        def vfstab_write(contents)
          etc_tempfile do |f|
            f.write(contents.join(""))
            f.close
            # move, preserving modes of destination file
            mover = Chef::FileContentManagement::Deploy.strategy(true)
            mover.deploy(f.path, VFSTAB)
          end
        end

        def vfstab_entry
          actual_options = unless options.nil?
                             tempops = options.dup
                             tempops.delete("noauto")
                             tempops
                           end
          autostr = mount_at_boot? ? "yes" : "no"
          passstr = pass == 0 ? "-" : pass
          optstr = (actual_options.nil? || actual_options.empty?) ? "-" : actual_options.join(",")
          "\n#{device}\t#{fsck_device}\t#{mount_point}\t#{fstype}\t#{passstr}\t#{autostr}\t#{optstr}\n"
        end

        def delete_vfstab_entry
          contents = []
          found = false
          ::File.readlines(VFSTAB).reverse_each do |line|
            if !found && line =~ /^#{device_regex}\s+\S+\s+#{Regexp.escape(mount_point)}/
                found = true
              Chef::Log.debug("#{new_resource} is removed from vfstab")
              next
            end
            contents << line
          end
          [contents, found]
        end

        def merge_vfstab_entry
          contents = ::File.readlines(VFSTAB)
          contents[-1].chomp!
          contents << vfstab_entry
        end

        def options_remove_noauto(temp_options)
          new_options = []
          new_options += temp_options.nil? ? [] : temp_options
          new_options.delete("noauto")
          new_options
        end

        def device_regex
          if ::File.symlink?(device)
            "(?:#{Regexp.escape(device)}|#{Regexp.escape(::File.expand_path(::File.readlink(device), ::File.dirname(device)))})"
          else
            Regexp.escape(device)
          end
        end
      end
    end
  end
end