Class: OsCtld::DB::Groups

Inherits:
PooledList show all
Defined in:
lib/osctld/db/groups.rb

Instance Attribute Summary

Attributes inherited from List

#objects

Instance Method Summary collapse

Methods inherited from PooledList

#contains?, #each_by_ids, #find, #select_by_ids

Methods inherited from List

#contains?, #count, #each, #find, #get, instance, #sync

Constructor Details

#initialize(*_) ⇒ Groups

Returns a new instance of Groups.



13
14
15
16
 
# File 'lib/osctld/db/groups.rb', line 13

def initialize(*_)
  super
  @index = {}
end

Instance Method Details

#add(grp) ⇒ Object 



111
112
113
114
115
116
117
 
# File 'lib/osctld/db/groups.rb', line 111

def add(grp)
  sync do
    super
    @index[grp.pool.name] ||= {}
    @index[grp.pool.name][grp.name] = grp
  end
end

#by_path(pool, name) ⇒ Object 



128
129
130
131
132
133
134
 
# File 'lib/osctld/db/groups.rb', line 128

def by_path(pool, name)
  sync do
    next nil unless @index.has_key?(pool.name)

    @index[pool.name][name]
  end
end

#default(pool) ⇒ Object 



107
108
109
 
# File 'lib/osctld/db/groups.rb', line 107

def default(pool)
  find('/default', pool)
end

#load_or_create(pool, name, path = nil) ⇒ Object (protected) 



138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
 
# File 'lib/osctld/db/groups.rb', line 138

def load_or_create(pool, name, path = nil)
  grp = nil
  root = name == '/'
  created = false

  begin
    grp = Group.new(pool, name, root:, devices: false)
  rescue Errno::ENOENT
    grp = Group.new(pool, name, load: false, root:)
    grp.configure(path:, devices: false)
    created = true
  end

  add(grp)
  [grp, created]
end

#remove(grp) ⇒ Object 



119
120
121
122
123
124
125
126
 
# File 'lib/osctld/db/groups.rb', line 119

def remove(grp)
  sync do
    super
    @index[grp.pool.name].delete(grp.name)
    @index.delete(grp.pool.name) if @index[grp.pool.name].empty?
    grp
  end
end

#root(pool) ⇒ Object 



103
104
105
 
# File 'lib/osctld/db/groups.rb', line 103

def root(pool)
  find('/', pool)
end

#setup(pool) ⇒ Object

Ensures presence of root and default groups



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
 
# File 'lib/osctld/db/groups.rb', line 19

def setup(pool)
  root, created = load_or_create(
    pool,
    '/',
    File.join(CGroup::ROOT_GROUP, "pool.#{pool.name}")
  )

  if created
    Devices::Lock.sync(pool) do
      # cgroupv1 devices are configured on the fly, so the cgroup has to be
      # initialized first
      root.devices.init if CGroup.v1?

      root.devices.add_new(
        :char, 1, 3, 'rwm',
        name: '/dev/null',
        inherit: true
      )
      root.devices.add_new(
        :char, 1, 5, 'rwm',
        name: '/dev/zero',
        inherit: true
      )
      root.devices.add_new(
        :char, 1, 7, 'rwm',
        name: '/dev/full',
        inherit: true
      )
      root.devices.add_new(
        :char, 1, 8, 'rwm',
        name: '/dev/random',
        inherit: true
      )
      root.devices.add_new(
        :char, 1, 9, 'rwm',
        name: '/dev/urandom',
        inherit: true
      )
      root.devices.add_new(
        :char, 1, 11, 'rwm',
        name: '/dev/kmsg',
        inherit: true
      )
      root.devices.add_new(
        :char, 5, 0, 'rwm',
        name: '/dev/tty',
        inherit: true
      )
      root.devices.add_new(
        :char, 5, 1, 'rwm',
        #  name: '/dev/console', # setup by lxc
        inherit: true
      )
      root.devices.add_new(
        :char, 5, 2, 'rwm',
        #  name: '/dev/ptmx', # setup by lxc
        inherit: true
      )
      root.devices.add_new(
        :char, 136, '*', 'rwm',
        #  name: '/dev/tty*', # setup by lxc
        inherit: true
      )
      root.devices.add_new(
        :block, '*', '*', 'm',
        inherit: true
      )
      root.devices.add_new(
        :char, '*', '*', 'm',
        inherit: true
      )

      root.devices.init if CGroup.v2?
    end

    root.save_config
  else
    root.devices.init
  end

  default, = load_or_create(pool, '/default')
  default.devices.init
end