X-Git-Url: https://git.sommitrealweird.co.uk/onak.git/blobdiff_plain/656d2e182686fed6d5b84ee711f2c771df3b14a7..38e51db0fc5b2cfb88a193e16a3f9a7c2246ac8a:/keydb_db3.c diff --git a/keydb_db3.c b/keydb_db3.c index 0ccaec3..f686770 100644 --- a/keydb_db3.c +++ b/keydb_db3.c @@ -4,6 +4,8 @@ * Jonathan McDowell * * Copyright 2002 Project Purple + * + * $Id: keydb_db3.c,v 1.19 2003/09/28 16:12:47 noodles Exp $ */ #include @@ -25,6 +27,7 @@ #include "decodekey.h" #include "keystructs.h" #include "mem.h" +#include "log.h" #include "onak-conf.h" #include "parsekey.h" @@ -34,9 +37,14 @@ static DB_ENV *dbenv = NULL; /** - * dbconn - our connection to the key database. + * numdb - The number of database files we have. + */ +static int numdbs = 16; + +/** + * dbconn - our connections to the key database files. */ -static DB *dbconn = NULL; +static DB **dbconns = NULL; /** * worddb - our connection to the word database. @@ -48,6 +56,11 @@ static DB *worddb = NULL; */ static DB_TXN *txn = NULL; +DB *keydb(uint64_t keyid) +{ + return(dbconns[keyid % numdbs]); +} + /** * makewordlist - Takes a string and splits it into a set of unique words. * @wordlist: The current word list. @@ -107,44 +120,88 @@ struct ll *makewordlist(struct ll *wordlist, char *word) */ void initdb(void) { - char buf[1024]; - int ret = 0; + char buf[1024]; + FILE *numdb = NULL; + int ret = 0; + int i = 0; + + snprintf(buf, sizeof(buf) - 1, "%s/num_keydb", config.db_dir); + numdb = fopen(buf, "r"); + if (numdb != NULL) { + if (fgets(buf, sizeof(buf), numdb) != NULL) { + numdbs = atoi(buf); + } + fclose(numdb); + } else { + logthing(LOGTHING_ERROR, "Couldn't open num_keydb: %s", + strerror(errno)); + } + + dbconns = malloc(sizeof (DB *) * numdbs); + if (dbconns == NULL) { + logthing(LOGTHING_CRITICAL, + "Couldn't allocate memory for dbconns"); + exit(1); + } ret = db_env_create(&dbenv, 0); if (ret != 0) { - fprintf(stderr, "db_env_create: %s\n", db_strerror(ret)); + logthing(LOGTHING_CRITICAL, + "db_env_create: %s", db_strerror(ret)); + exit(1); + } + + /* + * Enable deadlock detection so that we don't block indefinitely on + * anything. What we really want is simple 2 state locks, but I'm not + * sure how to make the standard DB functions do that yet. + */ + ret = dbenv->set_lk_detect(dbenv, DB_LOCK_DEFAULT); + if (ret != 0) { + logthing(LOGTHING_CRITICAL, + "db_env_create: %s", db_strerror(ret)); exit(1); } ret = dbenv->open(dbenv, config.db_dir, DB_INIT_LOG | DB_INIT_MPOOL | DB_INIT_LOCK | DB_INIT_TXN | - DB_RECOVER | DB_CREATE, + DB_CREATE, 0); if (ret != 0) { - dbenv->err(dbenv, ret, "%s", config.db_dir); + logthing(LOGTHING_CRITICAL, + "Erroring opening db environment: %s (%s)", + config.db_dir, + db_strerror(ret)); exit(1); } - ret = db_create(&dbconn, dbenv, 0); - if (ret != 0) { - fprintf(stderr, "db_create: %s\n", db_strerror(ret)); - exit(1); - } + for (i = 0; i < numdbs; i++) { + ret = db_create(&dbconns[i], dbenv, 0); + if (ret != 0) { + logthing(LOGTHING_CRITICAL, + "db_create: %s", db_strerror(ret)); + exit(1); + } - ret = dbconn->open(dbconn, "keydb.db", + snprintf(buf, 1023, "keydb.%d.db", i); + ret = dbconns[i]->open(dbconns[i], buf, NULL, DB_HASH, DB_CREATE, 0664); - if (ret != 0) { - dbconn->err(dbconn, ret, "keydb.db"); - exit(1); + if (ret != 0) { + logthing(LOGTHING_CRITICAL, + "Error opening key database: %s (%s)", + buf, + db_strerror(ret)); + exit(1); + } } ret = db_create(&worddb, dbenv, 0); if (ret != 0) { - fprintf(stderr, "db_create: %s\n", db_strerror(ret)); + logthing(LOGTHING_CRITICAL, "db_create: %s", db_strerror(ret)); exit(1); } ret = worddb->set_flags(worddb, DB_DUP); @@ -153,7 +210,10 @@ void initdb(void) DB_CREATE, 0664); if (ret != 0) { - worddb->err(worddb, ret, "worddb"); + logthing(LOGTHING_CRITICAL, + "Error opening word database: %s (%s)", + "worddb", + db_strerror(ret)); exit(1); } @@ -168,10 +228,15 @@ void initdb(void) */ void cleanupdb(void) { + int i = 0; + + txn_checkpoint(dbenv, 0, 0, 0); worddb->close(worddb, 0); worddb = NULL; - dbconn->close(dbconn, 0); - dbconn = NULL; + for (i = 0; i < numdbs; i++) { + dbconns[i]->close(dbconns[i], 0); + dbconns[i] = NULL; + } dbenv->close(dbenv, 0); dbenv = NULL; } @@ -187,6 +252,7 @@ bool starttrans(void) { int ret; + assert(dbenv != NULL); assert(txn == NULL); ret = txn_begin(dbenv, @@ -194,7 +260,9 @@ bool starttrans(void) &txn, 0); if (ret != 0) { - dbenv->err(dbenv, ret, "starttrans():"); + logthing(LOGTHING_CRITICAL, + "Error starting transaction: %s", + db_strerror(ret)); exit(1); } @@ -210,12 +278,15 @@ void endtrans(void) { int ret; + assert(dbenv != NULL); assert(txn != NULL); ret = txn_commit(txn, 0); if (ret != 0) { - dbenv->err(dbenv, ret, "endtrans():"); + logthing(LOGTHING_CRITICAL, + "Error ending transaction: %s", + db_strerror(ret)); exit(1); } txn = NULL; @@ -258,7 +329,7 @@ int fetch_key(uint64_t keyid, struct openpgp_publickey **publickey, starttrans(); } - ret = dbconn->get(dbconn, + ret = keydb(keyid)->get(keydb(keyid), txn, &key, &data, @@ -275,7 +346,9 @@ int fetch_key(uint64_t keyid, struct openpgp_publickey **publickey, packets = NULL; numkeys++; } else if (ret != DB_NOTFOUND) { - dbconn->err(dbconn, ret, "Problem retrieving key"); + logthing(LOGTHING_ERROR, + "Problem retrieving key: %s", + db_strerror(ret)); } if (!intrans) { @@ -424,6 +497,7 @@ int store_key(struct openpgp_publickey *publickey, bool intrans, bool update) unsigned char worddb_data[12]; struct ll *wordlist = NULL; struct ll *curword = NULL; + bool deadlock = false; keyid = get_keyid(publickey); @@ -440,61 +514,71 @@ int store_key(struct openpgp_publickey *publickey, bool intrans, bool update) * it definitely needs updated. */ if (update) { - delete_key(keyid, true); + deadlock = (delete_key(keyid, true) == -1); } /* * Convert the key to a flat set of binary data. */ - next = publickey->next; - publickey->next = NULL; - flatten_publickey(publickey, &packets, &list_end); - publickey->next = next; - - storebuf.offset = 0; - storebuf.size = 8192; - storebuf.buffer = malloc(8192); + if (!deadlock) { + next = publickey->next; + publickey->next = NULL; + flatten_publickey(publickey, &packets, &list_end); + publickey->next = next; + + storebuf.offset = 0; + storebuf.size = 8192; + storebuf.buffer = malloc(8192); - write_openpgp_stream(buffer_putchar, &storebuf, packets); - - /* - * Now we have the key data store it in the DB; the keyid is the key. - */ - memset(&key, 0, sizeof(key)); - memset(&data, 0, sizeof(data)); - key.data = &keyid; - key.size = sizeof(keyid); - keyid &= 0xFFFFFFFF; - data.size = storebuf.offset; - data.data = storebuf.buffer; + write_openpgp_stream(buffer_putchar, &storebuf, packets); - ret = dbconn->put(dbconn, - txn, - &key, - &data, - 0); /* flags*/ - if (ret != 0) { - dbconn->err(dbconn, ret, "Problem storing key"); - } + /* + * Now we have the key data store it in the DB; the keyid is + * the key. + */ + memset(&key, 0, sizeof(key)); + memset(&data, 0, sizeof(data)); + key.data = &keyid; + key.size = sizeof(keyid); + keyid &= 0xFFFFFFFF; + data.size = storebuf.offset; + data.data = storebuf.buffer; - free(storebuf.buffer); - storebuf.buffer = NULL; - storebuf.size = 0; - storebuf.offset = 0; + ret = keydb(keyid)->put(keydb(keyid), + txn, + &key, + &data, + 0); /* flags*/ + if (ret != 0) { + logthing(LOGTHING_ERROR, + "Problem storing key: %s", + db_strerror(ret)); + if (ret == DB_LOCK_DEADLOCK) { + deadlock = true; + } + } - free_packet_list(packets); - packets = NULL; + free(storebuf.buffer); + storebuf.buffer = NULL; + storebuf.size = 0; + storebuf.offset = 0; + + free_packet_list(packets); + packets = NULL; + } /* * Walk through our uids storing the words into the db with the keyid. */ - uids = keyuids(publickey, &primary); + if (!deadlock) { + uids = keyuids(publickey, &primary); + } if (uids != NULL) { for (i = 0; ret == 0 && uids[i] != NULL; i++) { wordlist = makewordlist(wordlist, uids[i]); } - for (curword = wordlist; curword != NULL; + for (curword = wordlist; curword != NULL && !deadlock; curword = curword->next) { memset(&key, 0, sizeof(key)); memset(&data, 0, sizeof(data)); @@ -525,8 +609,12 @@ int store_key(struct openpgp_publickey *publickey, bool intrans, bool update) &data, 0); if (ret != 0) { - worddb->err(worddb, ret, - "Problem storing key"); + logthing(LOGTHING_ERROR, + "Problem storing word: %s", + db_strerror(ret)); + if (ret == DB_LOCK_DEADLOCK) { + deadlock = true; + } } } @@ -546,7 +634,7 @@ int store_key(struct openpgp_publickey *publickey, bool intrans, bool update) endtrans(); } - return 0; + return deadlock ? -1 : 0 ; } /** @@ -569,6 +657,7 @@ int delete_key(uint64_t keyid, bool intrans) unsigned char worddb_data[12]; struct ll *wordlist = NULL; struct ll *curword = NULL; + bool deadlock = false; keyid &= 0xFFFFFFFF; @@ -594,7 +683,7 @@ int delete_key(uint64_t keyid, bool intrans) &cursor, 0); /* flags */ - for (curword = wordlist; curword != NULL; + for (curword = wordlist; curword != NULL && !deadlock; curword = curword->next) { memset(&key, 0, sizeof(key)); memset(&data, 0, sizeof(data)); @@ -628,14 +717,19 @@ int delete_key(uint64_t keyid, bool intrans) if (ret == 0) { ret = cursor->c_del(cursor, 0); if (ret != 0) { - worddb->err(worddb, ret, - "Problem deleting word."); + logthing(LOGTHING_ERROR, + "Problem deleting word: %s", + db_strerror(ret)); } } if (ret != 0) { - worddb->err(worddb, ret, - "Problem deleting word."); + logthing(LOGTHING_ERROR, + "Problem deleting word: %s", + db_strerror(ret)); + if (ret == DB_LOCK_DEADLOCK) { + deadlock = true; + } } } ret = cursor->c_close(cursor); @@ -655,19 +749,80 @@ int delete_key(uint64_t keyid, bool intrans) publickey = NULL; } - key.data = &keyid; - key.size = sizeof(keyid); + if (!deadlock) { + key.data = &keyid; + key.size = sizeof(keyid); - dbconn->del(dbconn, - txn, - &key, - 0); /* flags */ + keydb(keyid)->del(keydb(keyid), + txn, + &key, + 0); /* flags */ + } if (!intrans) { endtrans(); } - return (ret == DB_NOTFOUND); + return deadlock ? (-1) : (ret == DB_NOTFOUND); +} + +/** + * dumpdb - dump the key database + * @filenamebase: The base filename to use for the dump. + * + * Dumps the database into one or more files, which contain pure OpenPGP + * that can be reimported into onak or gpg. filenamebase provides a base + * file name for the dump; several files may be created, all of which will + * begin with this string and then have a unique number and a .pgp + * extension. + */ +int dumpdb(char *filenamebase) +{ + DBT key, data; + DBC *cursor = NULL; + int ret = 0; + int fd = -1; + int i = 0; + char filename[1024]; + + filename[1023] = 0; + for (i = 0; i < numdbs; i++) { + ret = dbconns[i]->cursor(dbconns[i], + NULL, + &cursor, + 0); /* flags */ + + snprintf(filename, 1023, "%s.%d.pgp", filenamebase, i); + fd = open(filename, O_CREAT | O_WRONLY | O_TRUNC, 0640); + if (fd == -1) { + logthing(LOGTHING_ERROR, + "Error opening keydump file (%s): %s", + filename, + strerror(errno)); + } else { + memset(&key, 0, sizeof(key)); + memset(&data, 0, sizeof(data)); + ret = cursor->c_get(cursor, &key, &data, DB_NEXT); + while (ret == 0) { + write(fd, data.data, data.size); + memset(&key, 0, sizeof(key)); + memset(&data, 0, sizeof(data)); + ret = cursor->c_get(cursor, &key, &data, + DB_NEXT); + } + if (ret != DB_NOTFOUND) { + logthing(LOGTHING_ERROR, + "Problem reading key: %s", + db_strerror(ret)); + } + close(fd); + } + + ret = cursor->c_close(cursor); + cursor = NULL; + } + + return 0; } /*