X-Git-Url: https://the.earth.li/gitweb/?a=blobdiff_plain;f=keydb_db3.c;h=e25b94ec9afbc984037d61aec92088ba2c1b2ce5;hb=44169bea490150f3c2bb2b20ba086cae77d89041;hp=6177ac70f404adb0ef0764434501e64b4c194a1a;hpb=b1cb08b256587f6c5d2c484438d942e58583ba88;p=onak.git

diff --git a/keydb_db3.c b/keydb_db3.c
index 6177ac7..e25b94e 100644
--- a/keydb_db3.c
+++ b/keydb_db3.c
@@ -4,8 +4,11 @@
  * Jonathan McDowell <noodles@earth.li>
  *
  * Copyright 2002 Project Purple
+ *
+ * $Id: keydb_db3.c,v 1.25 2004/05/26 17:46:21 noodles Exp $
  */
 
+#include <assert.h>
 #include <sys/types.h>
 #include <sys/uio.h>
 #include <ctype.h>
@@ -24,19 +27,44 @@
 #include "decodekey.h"
 #include "keystructs.h"
 #include "mem.h"
+#include "log.h"
 #include "onak-conf.h"
 #include "parsekey.h"
 
 /**
- *	dbconn - our connection to the key database.
+ *	dbenv - our database environment.
+ */
+static DB_ENV *dbenv = NULL;
+
+/**
+ *	numdb - The number of database files we have.
  */
-static DB *dbconn = NULL;
+static int numdbs = 16;
+
+/**
+ *	dbconn - our connections to the key database files.
+ */
+static DB **dbconns = NULL;
 
 /**
  *	worddb - our connection to the word database.
  */
 static DB *worddb = NULL;
 
+/**
+ *	txn - our current transaction id.
+ */
+static DB_TXN *txn = NULL;
+
+DB *keydb(uint64_t keyid)
+{
+	uint64_t keytrun;
+
+	keytrun = keyid >> 8;
+
+	return(dbconns[keytrun % numdbs]);
+}
+
 /**
  *	makewordlist - Takes a string and splits it into a set of unique words.
  *	@wordlist: The current word list.
@@ -94,43 +122,116 @@ struct ll *makewordlist(struct ll *wordlist, char *word)
  *	this file are called in order to allow the DB to be initialized ready
  *	for access.
  */
-void initdb(void)
+void initdb(bool readonly)
 {
-	char buf[1024];
-	int ret = 0;
+	char       buf[1024];
+	FILE      *numdb = NULL;
+	int        ret = 0;
+	int        i = 0;
+	u_int32_t  flags = 0;
 
-	strcpy(buf, config.db_dir);
-	strcat(buf, "/keydb.db");
-	
-	ret = db_create(&dbconn, NULL, 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 if (!readonly) {
+		logthing(LOGTHING_ERROR, "Couldn't open num_keydb: %s",
+				strerror(errno));
+		numdb = fopen(buf, "w");
+		if (numdb != NULL) {
+			fprintf(numdb, "%d", numdbs);
+			fclose(numdb);
+		} else {
+			logthing(LOGTHING_ERROR,
+				"Couldn't write 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) {
+		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) {
-		fprintf(stderr, "db_create: %s\n", db_strerror(ret));
+		logthing(LOGTHING_CRITICAL,
+			"db_env_create: %s", db_strerror(ret));
 		exit(1);
 	}
 
-	ret = dbconn->open(dbconn, buf, NULL, DB_HASH,
+	ret = dbenv->open(dbenv, config.db_dir,
+			DB_INIT_LOG | DB_INIT_MPOOL | DB_INIT_LOCK |
+			DB_INIT_TXN |
 			DB_CREATE,
-			0664);
+			0);
 	if (ret != 0) {
-		dbconn->err(dbconn, ret, "%s", buf);
+		logthing(LOGTHING_CRITICAL,
+				"Error opening db environment: %s (%s)",
+				config.db_dir,
+				db_strerror(ret));
 		exit(1);
 	}
 
-	strcpy(buf, config.db_dir);
-	strcat(buf, "/worddb");
-	
-	ret = db_create(&worddb, NULL, 0);
+	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);
+		}
+
+		snprintf(buf, 1023, "keydb.%d.db", i);
+		flags = DB_CREATE;
+		if (readonly) {
+			flags = DB_RDONLY;
+		}
+		ret = dbconns[i]->open(dbconns[i], buf,
+			NULL,
+			DB_HASH,
+			flags,
+			0664);
+		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);
 
-	ret = worddb->open(worddb, buf, NULL, DB_BTREE,
-			DB_CREATE,
+	ret = worddb->open(worddb, "worddb", NULL, DB_BTREE,
+			flags,
 			0664);
 	if (ret != 0) {
-		worddb->err(worddb, ret, "%s", buf);
+		logthing(LOGTHING_CRITICAL,
+				"Error opening word database: %s (%s)",
+				"worddb",
+				db_strerror(ret));
 		exit(1);
 	}
 	
@@ -145,10 +246,17 @@ 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;
 }
 
 /**
@@ -160,6 +268,22 @@ void cleanupdb(void)
  */
 bool starttrans(void)
 {
+	int ret;
+
+	assert(dbenv != NULL);
+	assert(txn == NULL);
+
+	ret = txn_begin(dbenv,
+		NULL, /* No parent transaction */
+		&txn,
+		0);
+	if (ret != 0) {
+		logthing(LOGTHING_CRITICAL,
+				"Error starting transaction: %s",
+				db_strerror(ret));
+		exit(1);
+	}
+
 	return true;
 }
 
@@ -170,6 +294,21 @@ bool starttrans(void)
  */
 void endtrans(void)
 {
+	int ret;
+
+	assert(dbenv != NULL);
+	assert(txn != NULL);
+
+	ret = txn_commit(txn,
+		0);
+	if (ret != 0) {
+		logthing(LOGTHING_CRITICAL,
+				"Error ending transaction: %s",
+				db_strerror(ret));
+		exit(1);
+	}
+	txn = NULL;
+
 	return;
 }
 
@@ -204,8 +343,12 @@ int fetch_key(uint64_t keyid, struct openpgp_publickey **publickey,
 	key.data = &keyid;
 	keyid &= 0xFFFFFFFF;
 
-	ret = dbconn->get(dbconn,
-			NULL, /* txn id */
+	if (!intrans) {
+		starttrans();
+	}
+
+	ret = keydb(keyid)->get(keydb(keyid),
+			txn,
 			&key,
 			&data,
 			0); /* flags*/
@@ -215,13 +358,19 @@ int fetch_key(uint64_t keyid, struct openpgp_publickey **publickey,
 		fetchbuf.offset = 0;
 		fetchbuf.size = data.size;
 		read_openpgp_stream(buffer_fetchchar, &fetchbuf,
-				&packets);
+				&packets, 0);
 		parse_keys(packets, publickey);
 		free_packet_list(packets);
 		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) {
+		endtrans();
 	}
 
 	return (numkeys);
@@ -258,9 +407,10 @@ int fetch_key_text(const char *search, struct openpgp_publickey **publickey)
 	searchtext = strdup(search);
 	wordlist = makewordlist(wordlist, searchtext);
 
+	starttrans();
 
 	ret = worddb->cursor(worddb,
-			NULL, /* txn */
+			txn,
 			&cursor,
 			0);   /* flags */
 
@@ -322,7 +472,7 @@ int fetch_key_text(const char *search, struct openpgp_publickey **publickey)
 
 			numkeys += fetch_key(keyid,
 					publickey,
-					false);
+					true);
 	}
 	llfree(keylist, free);
 	keylist = NULL;
@@ -331,6 +481,8 @@ int fetch_key_text(const char *search, struct openpgp_publickey **publickey)
 
 	ret = cursor->c_close(cursor);
 	cursor = NULL;
+
+	endtrans();
 	
 	return (numkeys);
 }
@@ -363,9 +515,14 @@ 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);
 
+	if (!intrans) {
+		starttrans();
+	}
+
 	/*
 	 * Delete the key if we already have it.
 	 *
@@ -375,61 +532,71 @@ 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);
+		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;
+		/*
+		 * 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;
+
+		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;
+			}
+		}
 
-	ret = dbconn->put(dbconn,
-			NULL, /* txn id */
-			&key,
-			&data,
-			0); /* flags*/
-	if (ret != 0) {
-		dbconn->err(dbconn, ret, "Problem storing key");
+		free(storebuf.buffer);
+		storebuf.buffer = NULL;
+		storebuf.size = 0;
+		storebuf.offset = 0; 
+	
+		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));
@@ -455,13 +622,17 @@ int store_key(struct openpgp_publickey *publickey, bool intrans, bool update)
 			worddb_data[10] = (keyid >>  8) & 0xFF;
 			worddb_data[11] = keyid & 0xFF; 
 			ret = worddb->put(worddb,
-				0,
+				txn,
 				&key,
 				&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;
+				}
 			}
 		}
 
@@ -477,7 +648,11 @@ int store_key(struct openpgp_publickey *publickey, bool intrans, bool update)
 		uids = NULL;
 	}
 
-	return 0;
+	if (!intrans) {
+		endtrans();
+	}
+
+	return deadlock ? -1 : 0 ;
 }
 
 /**
@@ -500,10 +675,15 @@ 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;
 
-	fetch_key(keyid, &publickey, intrans);
+	if (!intrans) {
+		starttrans();
+	}
+
+	fetch_key(keyid, &publickey, true);
 
 	/*
 	 * Walk through the uids removing the words from the worddb.
@@ -517,11 +697,11 @@ int delete_key(uint64_t keyid, bool intrans)
 		}
 				
 		ret = worddb->cursor(worddb,
-			NULL, /* txn */
+			txn,
 			&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));
@@ -551,13 +731,23 @@ int delete_key(uint64_t keyid, bool intrans)
 				&key,
 				&data,
 				DB_GET_BOTH);
+
 			if (ret == 0) {
 				ret = cursor->c_del(cursor, 0);
+				if (ret != 0) {
+					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);
@@ -577,15 +767,80 @@ 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,
-			NULL, /* txn id */
-			&key,
-			0); /* flags */
+		keydb(keyid)->del(keydb(keyid),
+				txn,
+				&key,
+				0); /* flags */
+	}
+
+	if (!intrans) {
+		endtrans();
+	}
+
+	return deadlock ? (-1) : (ret == DB_NOTFOUND);
+}
 
-	return (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;
 }
 
 /*