--- /dev/null
+
+/*
+ * $Id: cnid_cdb_open.c,v 1.2 2005-04-28 20:49:59 bfernhomberg Exp $
+ *
+ * Copyright (c) 1999. Adrian Sun (asun@zoology.washington.edu)
+ * All Rights Reserved. See COPYRIGHT.
+ *
+ * CNID database support.
+ *
+ * here's the deal:
+ * 1) afpd already caches did's.
+ * 2) the database stores cnid's as both did/name and dev/ino pairs.
+ * 3) RootInfo holds the value of the NextID.
+ * 4) the cnid database gets called in the following manner --
+ * start a database:
+ * cnid = cnid_open(root_dir);
+ *
+ * allocate a new id:
+ * newid = cnid_add(cnid, dev, ino, parent did,
+ * name, id); id is a hint for a specific id. pass 0 if you don't
+ * care. if the id is already assigned, you won't get what you
+ * requested.
+ *
+ * given an id, get a did/name and dev/ino pair.
+ * name = cnid_get(cnid, &id); given an id, return the corresponding
+ * info.
+ * return code = cnid_delete(cnid, id); delete an entry.
+ *
+ * with AFP, CNIDs 0-2 have special meanings. here they are:
+ * 0 -- invalid cnid
+ * 1 -- parent of root directory (handled by afpd)
+ * 2 -- root directory (handled by afpd)
+ *
+ * CNIDs 4-16 are reserved according to page 31 of the AFP 3.0 spec so,
+ * CNID_START begins at 17.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#ifdef CNID_BACKEND_CDB
+#include "cnid_cdb_private.h"
+
+#ifndef MIN
+#define MIN(a, b) ((a) < (b) ? (a) : (b))
+#endif /* ! MIN */
+
+#define DBHOME ".AppleDB"
+#define DBCNID "cnid2.db"
+#define DBDEVINO "devino.db"
+#define DBDIDNAME "didname.db" /* did/full name mapping */
+#define DBLOCKFILE "cnid.lock"
+
+#define DBHOMELEN 8
+#define DBLEN 10
+
+/* we version the did/name database so that we can change the format
+ * if necessary. the key is in the form of a did/name pair. in this case,
+ * we use 0/0. */
+#define DBVERSION_KEY "\0\0\0\0\0"
+#define DBVERSION_KEYLEN 5
+#define DBVERSION1 0x00000001U
+#define DBVERSION DBVERSION1
+
+#define DBOPTIONS (DB_CREATE | DB_INIT_CDB | DB_INIT_MPOOL)
+
+#define MAXITER 0xFFFF /* maximum number of simultaneously open CNID
+ * databases. */
+
+static char *old_dbfiles[] = {"cnid.db", NULL};
+
+/* -----------------------
+ * bandaid for LanTest performance pb. for now not used, cf. ifdef 0 below
+*/
+static int my_yield(void)
+{
+ struct timeval t;
+ int ret;
+
+ t.tv_sec = 0;
+ t.tv_usec = 1000;
+ ret = select(0, NULL, NULL, NULL, &t);
+ return 0;
+}
+
+/* --------------- */
+static int didname(dbp, pkey, pdata, skey)
+DB *dbp _U_;
+const DBT *pkey _U_, *pdata;
+DBT *skey;
+{
+int len;
+
+ memset(skey, 0, sizeof(DBT));
+ skey->data = (char *)pdata->data + CNID_DID_OFS;
+ len = strlen((char *)skey->data + CNID_DID_LEN);
+ skey->size = CNID_DID_LEN + len + 1;
+ return (0);
+}
+
+/* --------------- */
+static int devino(dbp, pkey, pdata, skey)
+DB *dbp _U_;
+const DBT *pkey _U_, *pdata;
+DBT *skey;
+{
+ memset(skey, 0, sizeof(DBT));
+ skey->data = (char *)pdata->data + CNID_DEVINO_OFS;
+ skey->size = CNID_DEVINO_LEN;
+ return (0);
+}
+
+/* --------------- */
+static int my_associate (DB *p, DB *s,
+ int (*callback)(DB *, const DBT *,const DBT *, DBT *),
+ u_int32_t flags)
+{
+#if DB_VERSION_MAJOR > 4 || (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 1)
+ return p->associate(p, NULL, s, callback, flags);
+#else
+#if (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR == 0)
+ return p->associate(p, s, callback, flags);
+#else
+ return 0; /* FIXME */
+#endif
+#endif
+}
+
+/* --------------- */
+static int my_open(DB * p, const char *f, const char *d, DBTYPE t, u_int32_t flags, int mode)
+{
+#if DB_VERSION_MAJOR > 4 || (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 1)
+ return p->open(p, NULL, f, d, t, flags, mode);
+#else
+ return p->open(p, f, d, t, flags, mode);
+#endif
+}
+
+/* --------------- */
+static struct _cnid_db *cnid_cdb_new(const char *volpath)
+{
+ struct _cnid_db *cdb;
+ int major, minor, patch;
+ char *version_str;
+
+ version_str = db_version(&major, &minor, &patch);
+
+ /* check library match, ignore if only patch level changed */
+ if ( major != DB_VERSION_MAJOR || minor != DB_VERSION_MINOR)
+ {
+ LOG(log_error, logtype_cnid, "cnid_cdb_new: the Berkeley DB library version used does not match the version compiled with: (%u.%u)/(%u.%u)", DB_VERSION_MAJOR, DB_VERSION_MINOR, major, minor);
+ return NULL;
+ }
+
+ if ((cdb = (struct _cnid_db *) calloc(1, sizeof(struct _cnid_db))) == NULL)
+ return NULL;
+
+ if ((cdb->volpath = strdup(volpath)) == NULL) {
+ free(cdb);
+ return NULL;
+ }
+
+ cdb->flags = CNID_FLAG_PERSISTENT;
+
+ cdb->cnid_add = cnid_cdb_add;
+ cdb->cnid_delete = cnid_cdb_delete;
+ cdb->cnid_get = cnid_cdb_get;
+ cdb->cnid_lookup = cnid_cdb_lookup;
+ cdb->cnid_nextid = NULL; /*cnid_cdb_nextid;*/
+ cdb->cnid_resolve = cnid_cdb_resolve;
+ cdb->cnid_update = cnid_cdb_update;
+ cdb->cnid_close = cnid_cdb_close;
+ cdb->cnid_getstamp = cnid_cdb_getstamp;
+ cdb->cnid_rebuild_add = cnid_cdb_rebuild_add;
+
+ return cdb;
+}
+
+/* --------------- */
+static int upgrade_required(char *dbdir)
+{
+ char path[MAXPATHLEN + 1];
+ int len, i;
+ int found = 0;
+ struct stat st;
+
+ strcpy(path, dbdir);
+
+ len = strlen(path);
+ if (path[len - 1] != '/') {
+ strcat(path, "/");
+ len++;
+ }
+
+ for (i = 0; old_dbfiles[i] != NULL; i++) {
+ strcpy(path + len, old_dbfiles[i]);
+ if ( !(stat(path, &st) < 0) ) {
+ found++;
+ continue;
+ }
+ if (errno != ENOENT) {
+ LOG(log_error, logtype_default, "cnid_open: Checking %s gave %s", path, strerror(errno));
+ found++;
+ }
+ }
+ return found;
+}
+
+/* --------------- */
+struct _cnid_db *cnid_cdb_open(const char *dir, mode_t mask)
+{
+ struct stat st;
+ char path[MAXPATHLEN + 1];
+ CNID_private *db;
+ struct _cnid_db *cdb;
+ int open_flag, len;
+ static int first = 0;
+ int rc;
+
+ if (!dir || *dir == 0) {
+ return NULL;
+ }
+
+ /* this checks .AppleDB.
+ We need space for dir + '/' + DBHOMELEN + '/' + DBLEN */
+ if ((len = strlen(dir)) > (MAXPATHLEN - DBHOMELEN - DBLEN - 2)) {
+ LOG(log_error, logtype_default, "cnid_open: Pathname too large: %s", dir);
+ return NULL;
+ }
+
+ if ((cdb = cnid_cdb_new(dir)) == NULL) {
+ LOG(log_error, logtype_default, "cnid_open: Unable to allocate memory for database");
+ return NULL;
+ }
+
+ if ((db = (CNID_private *) calloc(1, sizeof(CNID_private))) == NULL) {
+ LOG(log_error, logtype_default, "cnid_open: Unable to allocate memory for database");
+ goto fail_cdb;
+ }
+
+ cdb->_private = (void *) db;
+ db->magic = CNID_DB_MAGIC;
+
+ strcpy(path, dir);
+ if (path[len - 1] != '/') {
+ strcat(path, "/");
+ len++;
+ }
+
+ strcpy(path + len, DBHOME);
+ if ((stat(path, &st) < 0) && (ad_mkdir(path, 0777 & ~mask) < 0)) {
+ LOG(log_error, logtype_default, "cnid_open: DBHOME mkdir failed for %s", path);
+ goto fail_adouble;
+ }
+
+ if (upgrade_required(path)) {
+ LOG(log_error, logtype_default, "cnid_open: Found version 1 of the CNID database. Please upgrade to version 2");
+ goto fail_adouble;
+ }
+
+ /* Print out the version of BDB we're linked against. */
+ if (!first) {
+ first = 1;
+ LOG(log_info, logtype_default, "CNID DB initialized using %s", db_version(NULL, NULL, NULL));
+ }
+
+ open_flag = DB_CREATE;
+
+ /* We need to be able to open the database environment with full
+ * transaction, logging, and locking support if we ever hope to
+ * be a true multi-acess file server. */
+ if ((rc = db_env_create(&db->dbenv, 0)) != 0) {
+ LOG(log_error, logtype_default, "cnid_open: db_env_create: %s", db_strerror(rc));
+ goto fail_lock;
+ }
+
+ /* Open the database environment. */
+ if ((rc = db->dbenv->open(db->dbenv, path, DBOPTIONS, 0666 & ~mask)) != 0) {
+ LOG(log_error, logtype_default, "cnid_open: dbenv->open (rw) of %s failed: %s", path, db_strerror(rc));
+ /* FIXME: This should probably go. Even if it worked, any use for a read-only DB? Didier? */
+ if (rc == DB_RUNRECOVERY) {
+ /* This is the mother of all errors. We _must_ fail here. */
+ LOG(log_error, logtype_default,
+ "cnid_open: CATASTROPHIC ERROR opening database environment %s. Run db_recovery -c immediately", path);
+ goto fail_lock;
+ }
+
+ /* We can't get a full transactional environment, so multi-access
+ * is out of the question. Let's assume a read-only environment,
+ * and try to at least get a shared memory pool. */
+ if ((rc = db->dbenv->open(db->dbenv, path, DB_INIT_MPOOL, 0666 & ~mask)) != 0) {
+ /* Nope, not a MPOOL, either. Last-ditch effort: we'll try to
+ * open the environment with no flags. */
+ if ((rc = db->dbenv->open(db->dbenv, path, 0, 0666 & ~mask)) != 0) {
+ LOG(log_error, logtype_default, "cnid_open: dbenv->open of %s failed: %s", path, db_strerror(rc));
+ goto fail_lock;
+ }
+ }
+ db->flags |= CNIDFLAG_DB_RO;
+ open_flag = DB_RDONLY;
+ LOG(log_info, logtype_default, "cnid_open: Obtained read-only database environment %s", path);
+ }
+
+ /* ---------------------- */
+ /* Main CNID database. Use a hash for this one. */
+
+ if ((rc = db_create(&db->db_cnid, db->dbenv, 0)) != 0) {
+ LOG(log_error, logtype_default, "cnid_open: Failed to create cnid database: %s",
+ db_strerror(rc));
+ goto fail_appinit;
+ }
+
+ if ((rc = my_open(db->db_cnid, DBCNID, DBCNID, DB_BTREE, open_flag, 0666 & ~mask)) != 0) {
+ LOG(log_error, logtype_default, "cnid_open: Failed to open dev/ino database: %s",
+ db_strerror(rc));
+ goto fail_appinit;
+ }
+
+ /* ---------------------- */
+ /* did/name reverse mapping. We use a BTree for this one. */
+
+ if ((rc = db_create(&db->db_didname, db->dbenv, 0)) != 0) {
+ LOG(log_error, logtype_default, "cnid_open: Failed to create did/name database: %s",
+ db_strerror(rc));
+ goto fail_appinit;
+ }
+
+ if ((rc = my_open(db->db_didname, DBCNID, DBDIDNAME, DB_BTREE, open_flag, 0666 & ~mask))) {
+ LOG(log_error, logtype_default, "cnid_open: Failed to open did/name database: %s",
+ db_strerror(rc));
+ goto fail_appinit;
+ }
+
+ /* ---------------------- */
+ /* dev/ino reverse mapping. Use a hash for this one. */
+
+ if ((rc = db_create(&db->db_devino, db->dbenv, 0)) != 0) {
+ LOG(log_error, logtype_default, "cnid_open: Failed to create dev/ino database: %s",
+ db_strerror(rc));
+ goto fail_appinit;
+ }
+
+ if ((rc = my_open(db->db_devino, DBCNID, DBDEVINO, DB_BTREE, open_flag, 0666 & ~mask)) != 0) {
+ LOG(log_error, logtype_default, "cnid_open: Failed to open devino database: %s",
+ db_strerror(rc));
+ goto fail_appinit;
+ }
+
+ /* ---------------------- */
+ /* Associate the secondary with the primary. */
+ if ((rc = my_associate(db->db_cnid, db->db_didname, didname, 0)) != 0) {
+ LOG(log_error, logtype_default, "cnid_open: Failed to associate didname database: %s",
+ db_strerror(rc));
+ goto fail_appinit;
+ }
+
+ if ((rc = my_associate(db->db_cnid, db->db_devino, devino, 0)) != 0) {
+ LOG(log_error, logtype_default, "cnid_open: Failed to associate devino database: %s",
+ db_strerror(rc));
+ goto fail_appinit;
+ }
+
+#if 0
+ DBT key, pkey, data;
+ /* ---------------------- */
+ /* Check for version. This way we can update the database if we need
+ * to change the format in any way. */
+ memset(&key, 0, sizeof(key));
+ memset(&pkey, 0, sizeof(DBT));
+ memset(&data, 0, sizeof(data));
+ key.data = DBVERSION_KEY;
+ key.size = DBVERSION_KEYLEN;
+
+ if ((rc = db->db_didname->pget(db->db_didname, NULL, &key, &pkey, &data, 0)) != 0) {
+ int ret;
+ {
+ u_int32_t version = htonl(DBVERSION);
+
+ data.data = &version;
+ data.size = sizeof(version);
+ }
+ if ((ret = db->db_didname->put(db->db_cnid, NULL, &key, &data,
+ DB_NOOVERWRITE))) {
+ LOG(log_error, logtype_default, "cnid_open: Error putting new version: %s",
+ db_strerror(ret));
+ db->db_didname->close(db->db_didname, 0);
+ goto fail_appinit;
+ }
+ }
+#endif
+
+ /* TODO In the future we might check for version number here. */
+#if 0
+ memcpy(&version, data.data, sizeof(version));
+ if (version != ntohl(DBVERSION)) {
+ /* Do stuff here. */
+ }
+#endif /* 0 */
+
+ db_env_set_func_yield(my_yield);
+ return cdb;
+
+ fail_appinit:
+ if (db->db_didname)
+ db->db_didname->close(db->db_didname, 0);
+ if (db->db_devino)
+ db->db_devino->close(db->db_devino, 0);
+ if (db->db_cnid)
+ db->db_cnid->close(db->db_cnid, 0);
+ LOG(log_error, logtype_default, "cnid_open: Failed to setup CNID DB environment");
+ db->dbenv->close(db->dbenv, 0);
+
+ fail_lock:
+
+ fail_adouble:
+
+ free(db);
+
+ fail_cdb:
+ if (cdb->volpath != NULL)
+ free(cdb->volpath);
+ free(cdb);
+
+ return NULL;
+}
+
+struct _cnid_module cnid_cdb_module = {
+ "cdb",
+ {NULL, NULL},
+ cnid_cdb_open,
+ CNID_FLAG_SETUID | CNID_FLAG_BLOCK
+};
+
+
+#endif /* CNID_BACKEND_CDB */
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