1 /* Copyright (c) 2015, 2021, Oracle and/or its affiliates.
2
3 This program is free software; you can redistribute it and/or modify
4 it under the terms of the GNU General Public License, version 2.0,
5 as published by the Free Software Foundation.
6
7 This program is also distributed with certain software (including
8 but not limited to OpenSSL) that is licensed under separate terms,
9 as designated in a particular file or component or in included license
10 documentation. The authors of MySQL hereby grant you an additional
11 permission to link the program and your derivative works with the
12 separately licensed software that they have included with MySQL.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License, version 2.0, for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software Foundation,
21 51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA */
22
23 #include "compatibility_module.h"
24
Compatibility_module()25 Compatibility_module::Compatibility_module()
26 : local_version(NULL)
27 {}
28
Compatibility_module(Member_version & local_version)29 Compatibility_module::Compatibility_module(Member_version &local_version)
30 {
31 this->local_version= new Member_version(local_version.get_version());
32 }
33
34 Member_version&
get_local_version()35 Compatibility_module::get_local_version()
36 {
37 return *this->local_version;
38 }
39
40 void
set_local_version(Member_version & local_version)41 Compatibility_module::set_local_version(Member_version &local_version)
42 {
43 delete this->local_version;
44 this->local_version= new Member_version(local_version.get_version());
45 }
46
47 void
add_incompatibility(Member_version & from,Member_version & to)48 Compatibility_module::add_incompatibility(Member_version &from,
49 Member_version &to)
50 {
51 this->incompatibilities.
52 insert(std::make_pair(from.get_version(),
53 std::make_pair(to.get_version(),
54 to.get_version())));
55 }
56
57 void
add_incompatibility(Member_version & from,Member_version & to_min,Member_version & to_max)58 Compatibility_module::add_incompatibility(Member_version &from,
59 Member_version &to_min,
60 Member_version &to_max)
61 {
62 assert(to_min.get_version() <= to_max.get_version());
63 this->incompatibilities.
64 insert(std::make_pair(from.get_version(),
65 std::make_pair(to_min.get_version(),
66 to_max.get_version())));
67 }
68
69 Compatibility_type
check_local_incompatibility(Member_version & to,bool is_lowest_version)70 Compatibility_module::check_local_incompatibility(Member_version &to, bool is_lowest_version)
71 {
72 return check_incompatibility(get_local_version(), to, is_lowest_version);
73 }
74
75 bool
check_version_range_incompatibility(Member_version & from,unsigned int to_min,unsigned int to_max)76 Compatibility_module::check_version_range_incompatibility(Member_version &from,
77 unsigned int to_min,
78 unsigned int to_max)
79 {
80 unsigned int to_max_major_version= to_max >> 16;
81 unsigned int to_min_major_version= to_min >> 16;
82 // if it is outside the range of the major version
83 if (from.get_major_version() > to_max_major_version ||
84 from.get_major_version() < to_min_major_version)
85 return false;
86
87 unsigned int to_max_minor_version= (to_max >> 8) & 0xff;
88 unsigned int to_min_minor_version= (to_min >> 8) & 0xff;
89 // if it is outside the range of the minor version
90 if (from.get_minor_version() > to_max_minor_version ||
91 from.get_minor_version() < to_min_minor_version)
92 return false; /* purecov: inspected */
93
94 unsigned int to_max_patch_version= to_max & 0xff;
95 unsigned int to_min_patch_version= to_min & 0xff;
96 // if it is outside the range of the patch version
97 if (from.get_patch_version() > to_max_patch_version ||
98 from.get_patch_version() < to_min_patch_version)
99 return false;
100
101 return true;
102 }
103
104 Compatibility_type
check_incompatibility(Member_version & from,Member_version & to,bool do_version_check)105 Compatibility_module::check_incompatibility(Member_version &from,
106 Member_version &to,
107 bool do_version_check)
108 {
109 //Check if they are the same...
110 if (from == to)
111 return COMPATIBLE;
112
113 //Find if the values are present in the statically defined table...
114 std::pair <std::multimap<unsigned int,
115 std::pair<unsigned int, unsigned int> >::iterator,
116 std::multimap<unsigned int,
117 std::pair<unsigned int, unsigned int> >::iterator> search_its;
118
119 search_its = this->incompatibilities.equal_range(from.get_version());
120
121 for (std::multimap<unsigned int,
122 std::pair<unsigned int, unsigned int> >::iterator it=
123 search_its.first;
124 it != search_its.second;
125 ++it)
126 {
127 if (check_version_range_incompatibility(to,
128 it->second.first,
129 it->second.second))
130 {
131 return INCOMPATIBLE;
132 }
133 }
134
135 //It was not deemed incompatible by the table rules:
136
137 /*
138 Version compatibility might only be against the lowest group version
139 */
140 if(do_version_check)
141 {
142 /*
143 If they belong to the same major version
144 */
145 if (from.get_major_version() == to.get_major_version())
146 return COMPATIBLE;
147 }
148 else
149 {
150 return COMPATIBLE;
151 }
152
153 //If it has a higher major version then change to read mode
154 if (from.get_major_version() > to.get_major_version())
155 return READ_COMPATIBLE;
156
157 /*
158 It is a lower version, so it is incompatible lower, meaning
159 that by default it is not compatible, but user may ignore
160 this decision.
161 */
162 return INCOMPATIBLE_LOWER_VERSION;
163 }
164
~Compatibility_module()165 Compatibility_module::~Compatibility_module()
166 {
167 delete this->local_version;
168 }
169
170