root / lib / uidpool.py @ fdad8c4d
History | View | Annotate | Download (4.7 kB)
1 |
#
|
---|---|
2 |
#
|
3 |
|
4 |
# Copyright (C) 2010 Google Inc.
|
5 |
#
|
6 |
# This program is free software; you can redistribute it and/or modify
|
7 |
# it under the terms of the GNU General Public License as published by
|
8 |
# the Free Software Foundation; either version 2 of the License, or
|
9 |
# (at your option) any later version.
|
10 |
#
|
11 |
# This program is distributed in the hope that it will be useful, but
|
12 |
# WITHOUT ANY WARRANTY; without even the implied warranty of
|
13 |
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
14 |
# General Public License for more details.
|
15 |
#
|
16 |
# You should have received a copy of the GNU General Public License
|
17 |
# along with this program; if not, write to the Free Software
|
18 |
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
19 |
# 02110-1301, USA.
|
20 |
|
21 |
|
22 |
"""User-id pool related functions.
|
23 |
|
24 |
The user-id pool is cluster-wide configuration option.
|
25 |
It is stored as a list of user-id ranges.
|
26 |
This module contains functions used for manipulating the
|
27 |
user-id pool parameter and for requesting/returning user-ids
|
28 |
from the pool.
|
29 |
|
30 |
"""
|
31 |
|
32 |
from ganeti import errors |
33 |
from ganeti import constants |
34 |
|
35 |
|
36 |
def ParseUidPool(value, separator=None): |
37 |
"""Parse a user-id pool definition.
|
38 |
|
39 |
@param value: string representation of the user-id pool.
|
40 |
The accepted input format is a list of integer ranges.
|
41 |
The boundaries are inclusive.
|
42 |
Example: '1000-5000,8000,9000-9010'.
|
43 |
@param separator: the separator character between the uids/uid-ranges.
|
44 |
Defaults to a comma.
|
45 |
@return: a list of integer pairs (lower, higher range boundaries)
|
46 |
|
47 |
"""
|
48 |
if separator is None: |
49 |
separator = ","
|
50 |
|
51 |
ranges = [] |
52 |
for range_def in value.split(separator): |
53 |
if not range_def: |
54 |
# Skip empty strings
|
55 |
continue
|
56 |
boundaries = range_def.split("-")
|
57 |
n_elements = len(boundaries)
|
58 |
if n_elements > 2: |
59 |
raise errors.OpPrereqError(
|
60 |
"Invalid user-id range definition. Only one hyphen allowed: %s"
|
61 |
% boundaries) |
62 |
try:
|
63 |
lower = int(boundaries[0]) |
64 |
except (ValueError, TypeError), err: |
65 |
raise errors.OpPrereqError("Invalid user-id value for lower boundary of" |
66 |
" user-id range: %s"
|
67 |
% str(err), errors.ECODE_INVAL)
|
68 |
try:
|
69 |
higher = int(boundaries[n_elements - 1]) |
70 |
except (ValueError, TypeError), err: |
71 |
raise errors.OpPrereqError("Invalid user-id value for higher boundary of" |
72 |
" user-id range: %s"
|
73 |
% str(err), errors.ECODE_INVAL)
|
74 |
|
75 |
ranges.append((lower, higher)) |
76 |
|
77 |
ranges.sort() |
78 |
return ranges
|
79 |
|
80 |
|
81 |
def AddToUidPool(uid_pool, add_uids): |
82 |
"""Add a list of user-ids/user-id ranges to a user-id pool.
|
83 |
|
84 |
@param uid_pool: a user-id pool (list of integer tuples)
|
85 |
@param add_uids: user-id ranges to be added to the pool
|
86 |
(list of integer tuples)
|
87 |
|
88 |
"""
|
89 |
for uid_range in add_uids: |
90 |
if uid_range not in uid_pool: |
91 |
uid_pool.append(uid_range) |
92 |
uid_pool.sort() |
93 |
|
94 |
|
95 |
def RemoveFromUidPool(uid_pool, remove_uids): |
96 |
"""Remove a list of user-ids/user-id ranges from a user-id pool.
|
97 |
|
98 |
@param uid_pool: a user-id pool (list of integer tuples)
|
99 |
@param remove_uids: user-id ranges to be removed from the pool
|
100 |
(list of integer tuples)
|
101 |
|
102 |
"""
|
103 |
for uid_range in remove_uids: |
104 |
if uid_range not in uid_pool: |
105 |
raise errors.OpPrereqError(
|
106 |
"User-id range to be removed is not found in the current"
|
107 |
" user-id pool: %s" % uid_range, errors.ECODE_INVAL)
|
108 |
uid_pool.remove(uid_range) |
109 |
|
110 |
|
111 |
def CheckUidPool(uid_pool): |
112 |
"""Sanity check user-id pool range definition values.
|
113 |
|
114 |
@param uid_pool: a list of integer pairs (lower, higher range boundaries)
|
115 |
|
116 |
"""
|
117 |
for lower, higher in uid_pool: |
118 |
if lower > higher:
|
119 |
raise errors.OpPrereqError(
|
120 |
"Lower user-id range boundary value (%s)"
|
121 |
" is larger than higher boundary value (%s)" %
|
122 |
(lower, higher), errors.ECODE_INVAL) |
123 |
if lower < constants.UIDPOOL_UID_MIN:
|
124 |
raise errors.OpPrereqError(
|
125 |
"Lower user-id range boundary value (%s)"
|
126 |
" is smaller than UIDPOOL_UID_MIN (%s)." %
|
127 |
(lower, constants.UIDPOOL_UID_MIN), |
128 |
errors.ECODE_INVAL) |
129 |
if higher > constants.UIDPOOL_UID_MAX:
|
130 |
raise errors.OpPrereqError(
|
131 |
"Higher user-id boundary value (%s)"
|
132 |
" is larger than UIDPOOL_UID_MAX (%s)." %
|
133 |
(higher, constants.UIDPOOL_UID_MAX), |
134 |
errors.ECODE_INVAL) |
135 |
|
136 |
|
137 |
def ExpandUidPool(uid_pool): |
138 |
"""Expands a uid-pool definition to a list of uids.
|
139 |
|
140 |
@param uid_pool: a list of integer pairs (lower, higher range boundaries)
|
141 |
@return: a list of integers
|
142 |
|
143 |
"""
|
144 |
uids = set()
|
145 |
for lower, higher in uid_pool: |
146 |
uids.update(range(lower, higher + 1)) |
147 |
return list(uids) |