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f91c4e326a
Also fix getErrorText() to return the right error string on failure. This behavior now matches that of other operating systems. Report by Noah Misch Backpatch through 9.1
125 lines
3.3 KiB
C
125 lines
3.3 KiB
C
/*
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* tablespace.c
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*
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* tablespace functions
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*
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* Copyright (c) 2010-2014, PostgreSQL Global Development Group
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* contrib/pg_upgrade/tablespace.c
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*/
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#include "postgres_fe.h"
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#include "pg_upgrade.h"
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#include <sys/types.h>
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static void get_tablespace_paths(void);
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static void set_tablespace_directory_suffix(ClusterInfo *cluster);
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void
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init_tablespaces(void)
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{
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get_tablespace_paths();
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set_tablespace_directory_suffix(&old_cluster);
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set_tablespace_directory_suffix(&new_cluster);
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if (os_info.num_old_tablespaces > 0 &&
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strcmp(old_cluster.tablespace_suffix, new_cluster.tablespace_suffix) == 0)
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pg_fatal("Cannot upgrade to/from the same system catalog version when\n"
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"using tablespaces.\n");
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}
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/*
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* get_tablespace_paths()
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*
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* Scans pg_tablespace and returns a malloc'ed array of all tablespace
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* paths. Its the caller's responsibility to free the array.
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*/
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static void
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get_tablespace_paths(void)
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{
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PGconn *conn = connectToServer(&old_cluster, "template1");
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PGresult *res;
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int tblnum;
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int i_spclocation;
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char query[QUERY_ALLOC];
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snprintf(query, sizeof(query),
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"SELECT %s "
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"FROM pg_catalog.pg_tablespace "
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"WHERE spcname != 'pg_default' AND "
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" spcname != 'pg_global'",
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/* 9.2 removed the spclocation column */
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(GET_MAJOR_VERSION(old_cluster.major_version) <= 901) ?
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"spclocation" : "pg_catalog.pg_tablespace_location(oid) AS spclocation");
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res = executeQueryOrDie(conn, "%s", query);
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if ((os_info.num_old_tablespaces = PQntuples(res)) != 0)
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os_info.old_tablespaces = (char **) pg_malloc(
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os_info.num_old_tablespaces * sizeof(char *));
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else
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os_info.old_tablespaces = NULL;
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i_spclocation = PQfnumber(res, "spclocation");
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for (tblnum = 0; tblnum < os_info.num_old_tablespaces; tblnum++)
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{
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struct stat statBuf;
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os_info.old_tablespaces[tblnum] = pg_strdup(
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PQgetvalue(res, tblnum, i_spclocation));
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/*
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* Check that the tablespace path exists and is a directory.
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* Effectively, this is checking only for tables/indexes in
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* non-existent tablespace directories. Databases located in
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* non-existent tablespaces already throw a backend error.
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* Non-existent tablespace directories can occur when a data directory
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* that contains user tablespaces is moved as part of pg_upgrade
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* preparation and the symbolic links are not updated.
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*/
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if (stat(os_info.old_tablespaces[tblnum], &statBuf) != 0)
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{
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if (errno == ENOENT)
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report_status(PG_FATAL,
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"tablespace directory \"%s\" does not exist\n",
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os_info.old_tablespaces[tblnum]);
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else
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report_status(PG_FATAL,
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"cannot stat() tablespace directory \"%s\": %s\n",
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os_info.old_tablespaces[tblnum], getErrorText());
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}
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if (!S_ISDIR(statBuf.st_mode))
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report_status(PG_FATAL,
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"tablespace path \"%s\" is not a directory\n",
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os_info.old_tablespaces[tblnum]);
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}
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PQclear(res);
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PQfinish(conn);
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return;
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}
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static void
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set_tablespace_directory_suffix(ClusterInfo *cluster)
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{
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if (GET_MAJOR_VERSION(cluster->major_version) <= 804)
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cluster->tablespace_suffix = pg_strdup("");
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else
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{
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/* This cluster has a version-specific subdirectory */
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/* The leading slash is needed to start a new directory. */
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cluster->tablespace_suffix = psprintf("/PG_%s_%d",
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cluster->major_version_str,
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cluster->controldata.cat_ver);
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}
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}
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