Commit | Line | Data |
---|---|---|
5bde3efa ACK |
1 | /************************************************* |
2 | * Exim - an Internet mail transport agent * | |
3 | *************************************************/ | |
4 | ||
f9ba5e22 | 5 | /* Copyright (c) University of Cambridge 2016 - 2018*/ |
5bde3efa ACK |
6 | /* See the file NOTICE for conditions of use and distribution. */ |
7 | ||
8 | #include "../exim.h" | |
9 | ||
10 | #ifdef EXPERIMENTAL_LMDB | |
11 | ||
12 | #include <lmdb.h> | |
13 | ||
14 | typedef struct lmdbstrct | |
15 | { | |
16 | MDB_txn *txn; | |
17 | MDB_dbi db_dbi; | |
18 | } Lmdbstrct; | |
19 | ||
20 | ||
21 | /************************************************* | |
22 | * Open entry point * | |
23 | *************************************************/ | |
24 | ||
25 | static void * | |
26 | lmdb_open(uschar * filename, uschar ** errmsg) | |
27 | { | |
28 | MDB_env * db_env = NULL; | |
29 | Lmdbstrct * lmdb_p; | |
30 | int ret, save_errno; | |
31 | const uschar * errstr; | |
32 | ||
33 | lmdb_p = store_get(sizeof(Lmdbstrct)); | |
34 | lmdb_p->txn = NULL; | |
35 | ||
36 | if ((ret = mdb_env_create(&db_env))) | |
37 | { | |
38 | errstr = US"create environment"; | |
39 | goto bad; | |
40 | } | |
41 | ||
42 | if ((ret = mdb_env_open(db_env, CS filename, MDB_NOSUBDIR|MDB_RDONLY, 0660))) | |
43 | { | |
a3382e87 | 44 | errstr = string_sprintf("open environment with %s", filename); |
5bde3efa ACK |
45 | goto bad; |
46 | } | |
47 | ||
48 | if ((ret = mdb_txn_begin(db_env, NULL, MDB_RDONLY, &lmdb_p->txn))) | |
49 | { | |
50 | errstr = US"start transaction"; | |
51 | goto bad; | |
52 | } | |
53 | ||
54 | if ((ret = mdb_open(lmdb_p->txn, NULL, 0, &lmdb_p->db_dbi))) | |
55 | { | |
56 | errstr = US"open database"; | |
57 | goto bad; | |
58 | } | |
59 | ||
60 | return lmdb_p; | |
61 | ||
62 | bad: | |
63 | save_errno = errno; | |
64 | if (lmdb_p->txn) mdb_txn_abort(lmdb_p->txn); | |
65 | if (db_env) mdb_env_close(db_env); | |
66 | *errmsg = string_sprintf("LMDB: Unable to %s: %s", errstr, mdb_strerror(ret)); | |
67 | errno = save_errno; | |
68 | return NULL; | |
69 | } | |
70 | ||
71 | ||
72 | /************************************************* | |
73 | * Find entry point * | |
74 | *************************************************/ | |
75 | ||
76 | static int | |
77 | lmdb_find(void * handle, uschar * filename, | |
78 | const uschar * keystring, int length, uschar ** result, uschar ** errmsg, | |
79 | uint * do_cache) | |
80 | { | |
81 | int ret; | |
82 | MDB_val dbkey, data; | |
83 | Lmdbstrct * lmdb_p = handle; | |
84 | ||
85 | dbkey.mv_data = CS keystring; | |
86 | dbkey.mv_size = length; | |
87 | ||
5903c6ff | 88 | DEBUG(D_lookup) debug_printf("LMDB: lookup key: %s\n", CS keystring); |
5bde3efa ACK |
89 | |
90 | if ((ret = mdb_get(lmdb_p->txn, lmdb_p->db_dbi, &dbkey, &data)) == 0) | |
91 | { | |
92 | *result = string_copyn(US data.mv_data, data.mv_size); | |
93 | DEBUG(D_lookup) debug_printf("LMDB: lookup result: %s\n", *result); | |
94 | return OK; | |
95 | } | |
96 | else if (ret == MDB_NOTFOUND) | |
97 | { | |
98 | *errmsg = US"LMDB: lookup, no data found"; | |
99 | DEBUG(D_lookup) debug_printf("%s\n", *errmsg); | |
100 | return FAIL; | |
101 | } | |
102 | else | |
103 | { | |
104 | *errmsg = string_sprintf("LMDB: lookup error: %s", mdb_strerror(ret)); | |
105 | DEBUG(D_lookup) debug_printf("%s\n", *errmsg); | |
106 | return DEFER; | |
107 | } | |
108 | } | |
109 | ||
110 | ||
111 | /************************************************* | |
112 | * Close entry point * | |
113 | *************************************************/ | |
114 | ||
115 | static void | |
116 | lmdb_close(void * handle) | |
117 | { | |
118 | Lmdbstrct * lmdb_p = handle; | |
119 | MDB_env * db_env = mdb_txn_env(lmdb_p->txn); | |
120 | mdb_txn_abort(lmdb_p->txn); | |
121 | mdb_env_close(db_env); | |
122 | } | |
123 | ||
124 | ||
125 | /************************************************* | |
126 | * Version reporting entry point * | |
127 | *************************************************/ | |
128 | ||
129 | #include "../version.h" | |
130 | ||
131 | void | |
132 | lmdb_version_report(FILE * f) | |
133 | { | |
134 | fprintf(f, "Library version: LMDB: Compile: %d.%d.%d\n", | |
135 | MDB_VERSION_MAJOR, MDB_VERSION_MINOR, MDB_VERSION_PATCH); | |
136 | #ifdef DYNLOOKUP | |
137 | fprintf(f, " Exim version %s\n", EXIM_VERSION_STR); | |
138 | #endif | |
139 | } | |
140 | ||
141 | static lookup_info lmdb_lookup_info = { | |
142 | US"lmdb", /* lookup name */ | |
143 | lookup_absfile, /* query-style lookup */ | |
144 | lmdb_open, /* open function */ | |
145 | NULL, /* no check function */ | |
146 | lmdb_find, /* find function */ | |
147 | lmdb_close, /* close function */ | |
148 | NULL, /* tidy function */ | |
149 | NULL, /* quoting function */ | |
150 | lmdb_version_report /* version reporting */ | |
151 | }; | |
152 | ||
153 | #ifdef DYNLOOKUP | |
154 | # define lmdb_lookup_module_info _lookup_module_info | |
155 | #endif /* DYNLOOKUP */ | |
156 | ||
157 | static lookup_info *_lookup_list[] = { &lmdb_lookup_info }; | |
158 | lookup_module_info lmdb_lookup_module_info = { LOOKUP_MODULE_INFO_MAGIC, _lookup_list, 1 }; | |
159 | ||
160 | #endif /* EXPERIMENTAL_LMDB */ |