/*- * See the file LICENSE for redistribution information. * * Copyright (c) 2001-2002 * Sleepycat Software. All rights reserved. */ #include "db_config.h" #ifndef lint static const char revid[] = "$Id: db_rename.c,v 1.1.1.1 2003/11/20 22:13:14 toshok Exp $"; #endif /* not lint */ #ifndef NO_SYSTEM_INCLUDES #include #include #endif #include "db_int.h" #include "dbinc/db_page.h" #include "dbinc/db_shash.h" #include "dbinc/db_am.h" #include "dbinc/fop.h" #include "dbinc/lock.h" #include "dbinc/log.h" static int __db_subdb_rename __P(( DB *, DB_TXN *, const char *, const char *, const char *)); /* * __dbenv_dbrename * Rename method for DB_ENV. * * PUBLIC: int __dbenv_dbrename __P((DB_ENV *, DB_TXN *, * PUBLIC: const char *, const char *, const char *, u_int32_t)); */ int __dbenv_dbrename(dbenv, txn, name, subdb, newname, flags) DB_ENV *dbenv; DB_TXN *txn; const char *name, *subdb, *newname; u_int32_t flags; { DB *dbp; int ret, t_ret, txn_local; txn_local = 0; PANIC_CHECK(dbenv); ENV_ILLEGAL_BEFORE_OPEN(dbenv, "DB_ENV->dbrename"); /* Validate arguments. */ if ((ret = __db_fchk(dbenv, "DB->rename", flags, DB_AUTO_COMMIT)) != 0) return (ret); if ((ret = db_create(&dbp, dbenv, 0)) != 0) return (ret); /* * Create local transaction as necessary, check for consistent * transaction usage. */ if (IS_AUTO_COMMIT(dbenv, txn, flags)) { if ((ret = __db_txn_auto(dbp, &txn)) != 0) return (ret); txn_local = 1; } else if (txn != NULL && !TXN_ON(dbenv)) return (__db_not_txn_env(dbenv)); ret = __db_rename_i(dbp, txn, name, subdb, newname); /* Commit for DB_AUTO_COMMIT. */ if (txn_local) { if (ret == 0) ret = txn->commit(txn, 0); else if ((t_ret = txn->abort(txn)) != 0) ret = __db_panic(dbenv, t_ret); /* * We created the DBP here and when we committed/aborted, * we release all the tranasctional locks, which includes * the handle lock; mark the handle cleared explicitly. */ LOCK_INIT(dbp->handle_lock); dbp->lid = DB_LOCK_INVALIDID; } /* * We never opened this dbp for real, so don't call the transactional * version of DB->close, and use NOSYNC to avoid calling into mpool. */ if ((t_ret = dbp->close(dbp, DB_NOSYNC)) != 0 && ret == 0) ret = t_ret; return (ret); } /* * __db_rename * Rename method for DB. * * PUBLIC: int __db_rename __P((DB *, * PUBLIC: const char *, const char *, const char *, u_int32_t)); */ int __db_rename(dbp, name, subdb, newname, flags) DB *dbp; const char *name, *subdb, *newname; u_int32_t flags; { DB_ENV *dbenv; int ret, t_ret; dbenv = dbp->dbenv; PANIC_CHECK(dbenv); /* * Validate arguments, continuing to destroy the handle on failure. * * Cannot use DB_ILLEGAL_AFTER_OPEN directly because it returns. * * !!! * We have a serious problem if we're here with a handle used to open * a database -- we'll destroy the handle, and the application won't * ever be able to close the database. */ if (F_ISSET(dbp, DB_AM_OPEN_CALLED)) { ret = __db_mi_open(dbenv, "DB->rename", 1); goto err; } /* Validate arguments. */ if ((ret = __db_fchk(dbenv, "DB->rename", flags, 0)) != 0) goto err; /* Check for consistent transaction usage. */ if ((ret = __db_check_txn(dbp, NULL, DB_LOCK_INVALIDID, 0)) != 0) goto err; /* Rename the file. */ ret = __db_rename_i(dbp, NULL, name, subdb, newname); /* * We never opened this dbp for real, use NOSYNC to avoid calling into * mpool. */ err: if ((t_ret = dbp->close(dbp, DB_NOSYNC)) != 0 && ret == 0) ret = t_ret; return (ret); } /* * __db_rename_i * Internal rename method for DB. * * PUBLIC: int __db_rename_i __P((DB *, * PUBLIC: DB_TXN *, const char *, const char *, const char *)); */ int __db_rename_i(dbp, txn, name, subdb, newname) DB *dbp; DB_TXN *txn; const char *name, *subdb, *newname; { DB_ENV *dbenv; int ret; char *real_name; dbenv = dbp->dbenv; real_name = NULL; DB_TEST_RECOVERY(dbp, DB_TEST_PREDESTROY, ret, name); if (subdb != NULL) { ret = __db_subdb_rename(dbp, txn, name, subdb, newname); goto err; } /* From here on down, this pertains to files. */ /* Find the real name of the file. */ if ((ret = __db_appname(dbenv, DB_APP_DATA, name, 0, NULL, &real_name)) != 0) goto err; if ((ret = __fop_remove_setup(dbp, txn, real_name, 0)) != 0) goto err; if (dbp->db_am_rename != NULL && (ret = dbp->db_am_rename(dbp, txn, name, subdb, newname)) != 0) goto err; /* * The transactional case and non-transactional case are * quite different. In the non-transactional case, we simply * do the rename. In the transactional case, since we need * the ability to back out and maintain locking, we have to * create a temporary object as a placeholder. This is all * taken care of in the fop layer. */ if (txn != NULL) { if ((ret = __fop_dummy(dbp, txn, name, newname, 0)) != 0) goto err; } else { if ((ret = __fop_dbrename(dbp, name, newname)) != 0) goto err; } /* * I am pretty sure that we haven't gotten a dbreg id, so calling * dbreg_filelist_update is not necessary. */ DB_ASSERT(dbp->log_filename == NULL || dbp->log_filename->id == DB_LOGFILEID_INVALID); DB_TEST_RECOVERY(dbp, DB_TEST_POSTDESTROY, ret, newname); DB_TEST_RECOVERY_LABEL err: if (real_name != NULL) __os_free(dbenv, real_name); return (ret); } /* * __db_subdb_rename -- * Rename a subdatabase. */ static int __db_subdb_rename(dbp, txn, name, subdb, newname) DB *dbp; DB_TXN *txn; const char *name, *subdb, *newname; { DB *mdbp; DB_ENV *dbenv; PAGE *meta; int ret, t_ret; mdbp = NULL; meta = NULL; dbenv = dbp->dbenv; /* * We have not opened this dbp so it isn't marked as a subdb, * but it ought to be. */ F_SET(dbp, DB_AM_SUBDB); /* * Rename the entry in the main database. We need to first * get the meta-data page number (via MU_OPEN) so that we can * read the meta-data page and obtain a handle lock. Once we've * done that, we can proceed to do the rename in the master. */ if ((ret = __db_master_open(dbp, txn, name, 0, 0, &mdbp)) != 0) goto err; if ((ret = __db_master_update(mdbp, dbp, txn, subdb, dbp->type, MU_OPEN, NULL, 0)) != 0) goto err; if ((ret = mdbp->mpf->get(mdbp->mpf, &dbp->meta_pgno, 0, &meta)) != 0) goto err; memcpy(&dbp->fileid, ((DBMETA *)meta)->uid, DB_FILE_ID_LEN); if ((ret = __fop_lock_handle(dbenv, dbp, mdbp->lid, DB_LOCK_WRITE, NULL, 0)) != 0) goto err; ret = mdbp->mpf->put(mdbp->mpf, meta, 0); meta = NULL; if (ret != 0) goto err; if ((ret = __db_master_update(mdbp, dbp, txn, subdb, dbp->type, MU_RENAME, newname, 0)) != 0) goto err; DB_TEST_RECOVERY(dbp, DB_TEST_POSTDESTROY, ret, name); DB_TEST_RECOVERY_LABEL err: if (meta != NULL && (t_ret = mdbp->mpf->put(mdbp->mpf, meta, 0)) != 0 && ret == 0) ret = t_ret; if (mdbp != NULL && (t_ret = __db_close_i(mdbp, txn, 0)) != 0 && ret == 0) ret = t_ret; return (ret); }