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
|
#include "nar-info-disk-cache.hh"
#include "sync.hh"
#include "sqlite.hh"
#include <sqlite3.h>
namespace nix {
static const char * schema = R"sql(
create table if not exists BinaryCaches (
id integer primary key autoincrement not null,
url text unique not null,
timestamp integer not null,
storeDir text not null,
wantMassQuery integer not null,
priority integer not null
);
create table if not exists NARs (
cache integer not null,
hashPart text not null,
namePart text not null,
url text,
compression text,
fileHash text,
fileSize integer,
narHash text,
narSize integer,
refs text,
deriver text,
sigs text,
timestamp integer not null,
primary key (cache, hashPart),
foreign key (cache) references BinaryCaches(id) on delete cascade
);
create table if not exists NARExistence (
cache integer not null,
storePath text not null,
exist integer not null,
timestamp integer not null,
primary key (cache, storePath),
foreign key (cache) references BinaryCaches(id) on delete cascade
);
)sql";
class NarInfoDiskCacheImpl : public NarInfoDiskCache
{
public:
/* How long negative lookups are valid. */
const int ttlNegative = 3600;
struct Cache
{
int id;
Path storeDir;
bool wantMassQuery;
int priority;
};
struct State
{
SQLite db;
SQLiteStmt insertCache, queryCache, insertNAR, queryNAR, insertNARExistence, queryNARExistence;
std::map<std::string, Cache> caches;
};
Sync<State> _state;
NarInfoDiskCacheImpl()
{
auto state(_state.lock());
Path dbPath = getCacheDir() + "/nix/binary-cache-v4.sqlite";
createDirs(dirOf(dbPath));
if (sqlite3_open_v2(dbPath.c_str(), &state->db.db,
SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, 0) != SQLITE_OK)
throw Error(format("cannot open store cache ‘%s’") % dbPath);
if (sqlite3_busy_timeout(state->db, 60 * 60 * 1000) != SQLITE_OK)
throwSQLiteError(state->db, "setting timeout");
// We can always reproduce the cache.
if (sqlite3_exec(state->db, "pragma synchronous = off", 0, 0, 0) != SQLITE_OK)
throwSQLiteError(state->db, "making database asynchronous");
if (sqlite3_exec(state->db, "pragma main.journal_mode = truncate", 0, 0, 0) != SQLITE_OK)
throwSQLiteError(state->db, "setting journal mode");
if (sqlite3_exec(state->db, schema, 0, 0, 0) != SQLITE_OK)
throwSQLiteError(state->db, "initialising database schema");
state->insertCache.create(state->db,
"insert or replace into BinaryCaches(url, timestamp, storeDir, wantMassQuery, priority) values (?, ?, ?, ?, ?)");
state->queryCache.create(state->db,
"select id, storeDir, wantMassQuery, priority from BinaryCaches where url = ?");
state->insertNAR.create(state->db,
"insert or replace into NARs(cache, hashPart, namePart, url, compression, fileHash, fileSize, narHash, "
"narSize, refs, deriver, sigs, timestamp) values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)");
state->queryNAR.create(state->db,
"select * from NARs where cache = ? and hashPart = ?");
state->insertNARExistence.create(state->db,
"insert or replace into NARExistence(cache, storePath, exist, timestamp) values (?, ?, ?, ?)");
state->queryNARExistence.create(state->db,
"select exist, timestamp from NARExistence where cache = ? and storePath = ?");
}
Cache & getCache(State & state, const std::string & uri)
{
auto i = state.caches.find(uri);
if (i == state.caches.end()) abort();
return i->second;
}
void createCache(const std::string & uri, const Path & storeDir, bool wantMassQuery, int priority) override
{
auto state(_state.lock());
// FIXME: race
state->insertCache.use()(uri)(time(0))(storeDir)(wantMassQuery)(priority).exec();
assert(sqlite3_changes(state->db) == 1);
state->caches[uri] = Cache{(int) sqlite3_last_insert_rowid(state->db), storeDir, wantMassQuery, priority};
}
bool cacheExists(const std::string & uri,
bool & wantMassQuery, int & priority) override
{
auto state(_state.lock());
auto i = state->caches.find(uri);
if (i == state->caches.end()) {
auto queryCache(state->queryCache.use()(uri));
if (!queryCache.next()) return false;
state->caches.emplace(uri,
Cache{(int) queryCache.getInt(0), queryCache.getStr(1), queryCache.getInt(2) != 0, (int) queryCache.getInt(3)});
}
auto & cache(getCache(*state, uri));
wantMassQuery = cache.wantMassQuery;
priority = cache.priority;
return true;
}
std::pair<Outcome, std::shared_ptr<NarInfo>> lookupNarInfo(
const std::string & uri, const std::string & hashPart) override
{
auto state(_state.lock());
auto & cache(getCache(*state, uri));
auto queryNAR(state->queryNAR.use()(cache.id)(hashPart));
if (!queryNAR.next())
// FIXME: check NARExistence
return {oUnknown, 0};
auto narInfo = make_ref<NarInfo>();
// FIXME: implement TTL.
auto namePart = queryNAR.getStr(2);
narInfo->path = cache.storeDir + "/" +
hashPart + (namePart.empty() ? "" : "-" + namePart);
narInfo->url = queryNAR.getStr(3);
narInfo->compression = queryNAR.getStr(4);
if (!queryNAR.isNull(5))
narInfo->fileHash = parseHash(queryNAR.getStr(5));
narInfo->fileSize = queryNAR.getInt(6);
narInfo->narHash = parseHash(queryNAR.getStr(7));
narInfo->narSize = queryNAR.getInt(8);
for (auto & r : tokenizeString<Strings>(queryNAR.getStr(9), " "))
narInfo->references.insert(cache.storeDir + "/" + r);
if (!queryNAR.isNull(10))
narInfo->deriver = cache.storeDir + "/" + queryNAR.getStr(10);
for (auto & sig : tokenizeString<Strings>(queryNAR.getStr(11), " "))
narInfo->sigs.insert(sig);
return {oValid, narInfo};
}
void upsertNarInfo(
const std::string & uri, const std::string & hashPart,
std::shared_ptr<ValidPathInfo> info) override
{
auto state(_state.lock());
auto & cache(getCache(*state, uri));
if (info) {
auto narInfo = std::dynamic_pointer_cast<NarInfo>(info);
assert(hashPart == storePathToHash(info->path));
state->insertNAR.use()
(cache.id)
(hashPart)
(storePathToName(info->path))
(narInfo ? narInfo->url : "", narInfo != 0)
(narInfo ? narInfo->compression : "", narInfo != 0)
(narInfo && narInfo->fileHash ? narInfo->fileHash.to_string() : "", narInfo && narInfo->fileHash)
(narInfo ? narInfo->fileSize : 0, narInfo != 0 && narInfo->fileSize)
(info->narHash.to_string())
(info->narSize)
(concatStringsSep(" ", info->shortRefs()))
(info->deriver != "" ? baseNameOf(info->deriver) : "", info->deriver != "")
(concatStringsSep(" ", info->sigs))
(time(0)).exec();
} else {
// not implemented
abort();
}
}
};
ref<NarInfoDiskCache> getNarInfoDiskCache()
{
static Sync<std::shared_ptr<NarInfoDiskCache>> cache;
auto cache_(cache.lock());
if (!*cache_) *cache_ = std::make_shared<NarInfoDiskCacheImpl>();
return ref<NarInfoDiskCache>(*cache_);
}
}
|
