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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:16:13 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:16:13 +0000 |
commit | e90fcc54809db2591dc083f43ef54c6ec8c60847 (patch) | |
tree | f20bc206c3c2d5d59d37c46c5cf5d53a20642556 /src/lookups/lmdb.c | |
parent | Initial commit. (diff) | |
download | exim4-e90fcc54809db2591dc083f43ef54c6ec8c60847.tar.xz exim4-e90fcc54809db2591dc083f43ef54c6ec8c60847.zip |
Adding upstream version 4.96.upstream/4.96upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/lookups/lmdb.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/src/lookups/lmdb.c b/src/lookups/lmdb.c new file mode 100644 index 0000000..a32c7f7 --- /dev/null +++ b/src/lookups/lmdb.c @@ -0,0 +1,162 @@ +/************************************************* +* Exim - an Internet mail transport agent * +*************************************************/ + +/* Copyright (c) The Exim Maintainers 2020 - 2022 */ +/* Copyright (c) University of Cambridge 2016 - 2018 */ +/* See the file NOTICE for conditions of use and distribution. */ + +#include "../exim.h" + +#ifdef LOOKUP_LMDB + +#include <lmdb.h> + +typedef struct lmdbstrct +{ +MDB_txn *txn; +MDB_dbi db_dbi; +} Lmdbstrct; + + +/************************************************* +* Open entry point * +*************************************************/ + +static void * +lmdb_open(const uschar * filename, uschar ** errmsg) +{ +MDB_env * db_env = NULL; +Lmdbstrct * lmdb_p; +int ret, save_errno; +const uschar * errstr; + +lmdb_p = store_get(sizeof(Lmdbstrct), GET_UNTAINTED); +lmdb_p->txn = NULL; + +if ((ret = mdb_env_create(&db_env))) + { + errstr = US"create environment"; + goto bad; + } + +if ((ret = mdb_env_open(db_env, CS filename, MDB_NOSUBDIR|MDB_RDONLY, 0660))) + { + errstr = string_sprintf("open environment with %s", filename); + goto bad; + } + +if ((ret = mdb_txn_begin(db_env, NULL, MDB_RDONLY, &lmdb_p->txn))) + { + errstr = US"start transaction"; + goto bad; + } + +if ((ret = mdb_open(lmdb_p->txn, NULL, 0, &lmdb_p->db_dbi))) + { + errstr = US"open database"; + goto bad; + } + +return lmdb_p; + +bad: + save_errno = errno; + if (lmdb_p->txn) mdb_txn_abort(lmdb_p->txn); + if (db_env) mdb_env_close(db_env); + *errmsg = string_sprintf("LMDB: Unable to %s: %s", errstr, mdb_strerror(ret)); + errno = save_errno; + return NULL; +} + + +/************************************************* +* Find entry point * +*************************************************/ + +static int +lmdb_find(void * handle, const uschar * filename, + const uschar * keystring, int length, uschar ** result, uschar ** errmsg, + uint * do_cache, const uschar * opts) +{ +int ret; +MDB_val dbkey, data; +Lmdbstrct * lmdb_p = handle; + +dbkey.mv_data = CS keystring; +dbkey.mv_size = length; + +DEBUG(D_lookup) debug_printf_indent("LMDB: lookup key: %s\n", CS keystring); + +if ((ret = mdb_get(lmdb_p->txn, lmdb_p->db_dbi, &dbkey, &data)) == 0) + { + *result = string_copyn(US data.mv_data, data.mv_size); + DEBUG(D_lookup) debug_printf_indent("LMDB: lookup result: %s\n", *result); + return OK; + } +else if (ret == MDB_NOTFOUND) + { + *errmsg = US"LMDB: lookup, no data found"; + DEBUG(D_lookup) debug_printf_indent("%s\n", *errmsg); + return FAIL; + } +else + { + *errmsg = string_sprintf("LMDB: lookup error: %s", mdb_strerror(ret)); + DEBUG(D_lookup) debug_printf_indent("%s\n", *errmsg); + return DEFER; + } +} + + +/************************************************* +* Close entry point * +*************************************************/ + +static void +lmdb_close(void * handle) +{ +Lmdbstrct * lmdb_p = handle; +MDB_env * db_env = mdb_txn_env(lmdb_p->txn); +mdb_txn_abort(lmdb_p->txn); +mdb_env_close(db_env); +} + + +/************************************************* +* Version reporting entry point * +*************************************************/ + +#include "../version.h" + +gstring * +lmdb_version_report(gstring * g) +{ +g = string_fmt_append(g, "Library version: LMDB: Compile: %d.%d.%d\n", + MDB_VERSION_MAJOR, MDB_VERSION_MINOR, MDB_VERSION_PATCH); +#ifdef DYNLOOKUP +g = string_fmt_append(g, " Exim version %s\n", EXIM_VERSION_STR); +#endif +return g; +} + +static lookup_info lmdb_lookup_info = { + .name = US"lmdb", /* lookup name */ + .type = lookup_absfile, /* query-style lookup */ + .open = lmdb_open, /* open function */ + .check = NULL, /* no check function */ + .find = lmdb_find, /* find function */ + .close = lmdb_close, /* close function */ + .tidy = NULL, /* tidy function */ + .quote = NULL, /* quoting function */ + .version_report = lmdb_version_report /* version reporting */ +}; + +#ifdef DYNLOOKUP +# define lmdb_lookup_module_info _lookup_module_info +#endif /* DYNLOOKUP */ + +static lookup_info *_lookup_list[] = { &lmdb_lookup_info }; +lookup_module_info lmdb_lookup_module_info = { LOOKUP_MODULE_INFO_MAGIC, _lookup_list, 1 }; + +#endif /* LOOKUP_LMDB */ |