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
|
/**
* Copyright (C) 2022-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/db/catalog_raii.h"
#include "mongo/db/s/collection_sharding_runtime.h"
#include "mongo/db/s/operation_sharding_state.h"
#include "mongo/db/s/sharding_state.h"
namespace mongo {
CollectionMetadata checkCollectionIdentity(OperationContext* opCtx,
const NamespaceString& nss,
const OID& expectedEpoch,
const boost::optional<Timestamp>& expectedTimestamp) {
AutoGetCollection collection(opCtx, nss, MODE_IS);
const auto shardId = ShardingState::get(opCtx)->shardId();
auto* const csr = CollectionShardingRuntime::get(opCtx, nss);
const auto csrLock = CollectionShardingRuntime::CSRLock::lockExclusive(opCtx, csr);
auto optMetadata = csr->getCurrentMetadataIfKnown();
uassert(StaleConfigInfo(nss,
ShardVersion::IGNORED() /* receivedVersion */,
boost::none /* wantedVersion */,
shardId),
str::stream() << "Collection " << nss.ns() << " needs to be recovered",
optMetadata);
auto metadata = *optMetadata;
uassert(StaleConfigInfo(nss,
ShardVersion::IGNORED() /* receivedVersion */,
ShardVersion::UNSHARDED() /* wantedVersion */,
shardId),
str::stream() << "Collection " << nss.ns() << " is not sharded",
metadata.isSharded());
uassert(ErrorCodes::NamespaceNotFound,
"The collection was not found locally even though it is marked as sharded.",
collection);
const auto shardVersion = metadata.getShardVersion();
uassert(StaleConfigInfo(nss,
ShardVersion::IGNORED() /* receivedVersion */,
ShardVersion(shardVersion) /* wantedVersion */,
shardId),
str::stream() << "Collection " << nss.ns()
<< " has changed since operation was sent (sent epoch: " << expectedEpoch
<< ", current epoch: " << shardVersion.epoch() << ")",
expectedEpoch == shardVersion.epoch() &&
(!expectedTimestamp || expectedTimestamp == shardVersion.getTimestamp()));
uassert(StaleConfigInfo(nss,
ShardVersion::IGNORED() /* receivedVersion */,
ShardVersion(shardVersion) /* wantedVersion */,
shardId),
str::stream() << "Shard does not contain any chunks for collection.",
shardVersion.majorVersion() > 0);
return metadata;
}
void checkShardKeyPattern(OperationContext* opCtx,
const NamespaceString& nss,
const CollectionMetadata& metadata,
const ChunkRange& chunkRange) {
const auto shardId = ShardingState::get(opCtx)->shardId();
const auto& keyPattern = metadata.getKeyPattern();
const auto shardVersion = metadata.getShardVersion();
uassert(StaleConfigInfo(nss,
ShardVersion::IGNORED() /* receivedVersion */,
ShardVersion(shardVersion) /* wantedVersion */,
shardId),
str::stream() << "The range " << chunkRange.toString()
<< " is not valid for collection " << nss.ns() << " with key pattern "
<< keyPattern.toString(),
metadata.isValidKey(chunkRange.getMin()) && metadata.isValidKey(chunkRange.getMax()));
}
void checkChunkMatchesRange(OperationContext* opCtx,
const NamespaceString& nss,
const CollectionMetadata& metadata,
const ChunkRange& chunkRange) {
const auto shardId = ShardingState::get(opCtx)->shardId();
const auto shardVersion = metadata.getShardVersion();
ChunkType existingChunk;
uassert(StaleConfigInfo(nss,
ShardVersion::IGNORED() /* receivedVersion */,
ShardVersion(shardVersion) /* wantedVersion */,
shardId),
str::stream() << "Range with bounds " << chunkRange.toString()
<< " is not owned by this shard.",
metadata.getNextChunk(chunkRange.getMin(), &existingChunk) &&
existingChunk.getMin().woCompare(chunkRange.getMin()) == 0);
uassert(StaleConfigInfo(nss,
ShardVersion::IGNORED() /* receivedVersion */,
ShardVersion(shardVersion) /* wantedVersion */,
shardId),
str::stream() << "Chunk bounds " << chunkRange.toString() << " do not exist.",
existingChunk.getRange() == chunkRange);
}
void checkRangeWithinChunk(OperationContext* opCtx,
const NamespaceString& nss,
const CollectionMetadata& metadata,
const ChunkRange& chunkRange) {
const auto shardId = ShardingState::get(opCtx)->shardId();
const auto shardVersion = metadata.getShardVersion();
ChunkType existingChunk;
uassert(StaleConfigInfo(nss,
ShardVersion::IGNORED() /* receivedVersion */,
ShardVersion(shardVersion) /* wantedVersion */,
shardId),
str::stream() << "Range with bounds " << chunkRange.toString()
<< " is not contained within a chunk owned by this shard.",
metadata.getNextChunk(chunkRange.getMin(), &existingChunk) &&
existingChunk.getRange().covers(chunkRange));
}
void checkRangeOwnership(OperationContext* opCtx,
const NamespaceString& nss,
const CollectionMetadata& metadata,
const ChunkRange& chunkRange) {
const auto shardId = ShardingState::get(opCtx)->shardId();
const auto shardVersion = metadata.getShardVersion();
ChunkType existingChunk;
BSONObj minKey = chunkRange.getMin();
do {
uassert(StaleConfigInfo(nss,
ShardVersion::IGNORED() /* receivedVersion */,
ShardVersion(shardVersion) /* wantedVersion */,
shardId),
str::stream() << "Range with bounds " << chunkRange.toString()
<< " is not owned by this shard.",
metadata.getNextChunk(minKey, &existingChunk) &&
existingChunk.getMin().woCompare(minKey) == 0);
minKey = existingChunk.getMax();
} while (existingChunk.getMax().woCompare(chunkRange.getMax()) < 0);
uassert(
StaleConfigInfo(nss,
ShardVersion::IGNORED() /* receivedVersion */,
ShardVersion(shardVersion) /* wantedVersion */,
shardId),
str::stream() << "Shard does not contain a sequence of chunks that exactly fills the range "
<< chunkRange.toString(),
existingChunk.getMax().woCompare(chunkRange.getMax()) == 0);
}
} // namespace mongo
|
