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This trims down the code, and is in preparation for hardening pg_upgrade against auto-oid assignment.
610 lines
18 KiB
C
610 lines
18 KiB
C
/*
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* controldata.c
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*
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* controldata functions
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*
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* Copyright (c) 2010-2014, PostgreSQL Global Development Group
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* contrib/pg_upgrade/controldata.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 <ctype.h>
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/*
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* get_control_data()
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*
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* gets pg_control information in "ctrl". Assumes that bindir and
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* datadir are valid absolute paths to postgresql bin and pgdata
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* directories respectively *and* pg_resetxlog is version compatible
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* with datadir. The main purpose of this function is to get pg_control
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* data in a version independent manner.
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*
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* The approach taken here is to invoke pg_resetxlog with -n option
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* and then pipe its output. With little string parsing we get the
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* pg_control data. pg_resetxlog cannot be run while the server is running
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* so we use pg_controldata; pg_controldata doesn't provide all the fields
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* we need to actually perform the upgrade, but it provides enough for
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* check mode. We do not implement pg_resetxlog -n because it is hard to
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* return valid xid data for a running server.
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*/
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void
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get_control_data(ClusterInfo *cluster, bool live_check)
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{
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char cmd[MAXPGPATH];
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char bufin[MAX_STRING];
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FILE *output;
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char *p;
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bool got_xid = false;
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bool got_oid = false;
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bool got_nextxlogfile = false;
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bool got_multi = false;
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bool got_mxoff = false;
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bool got_oldestmulti = false;
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bool got_log_id = false;
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bool got_log_seg = false;
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bool got_tli = false;
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bool got_align = false;
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bool got_blocksz = false;
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bool got_largesz = false;
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bool got_walsz = false;
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bool got_walseg = false;
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bool got_ident = false;
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bool got_index = false;
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bool got_toast = false;
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bool got_date_is_int = false;
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bool got_float8_pass_by_value = false;
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bool got_data_checksum_version = false;
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char *lc_collate = NULL;
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char *lc_ctype = NULL;
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char *lc_monetary = NULL;
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char *lc_numeric = NULL;
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char *lc_time = NULL;
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char *lang = NULL;
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char *language = NULL;
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char *lc_all = NULL;
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char *lc_messages = NULL;
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uint32 logid = 0;
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uint32 segno = 0;
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uint32 tli = 0;
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/*
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* Because we test the pg_resetxlog output as strings, it has to be in
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* English. Copied from pg_regress.c.
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*/
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if (getenv("LC_COLLATE"))
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lc_collate = pg_strdup(getenv("LC_COLLATE"));
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if (getenv("LC_CTYPE"))
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lc_ctype = pg_strdup(getenv("LC_CTYPE"));
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if (getenv("LC_MONETARY"))
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lc_monetary = pg_strdup(getenv("LC_MONETARY"));
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if (getenv("LC_NUMERIC"))
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lc_numeric = pg_strdup(getenv("LC_NUMERIC"));
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if (getenv("LC_TIME"))
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lc_time = pg_strdup(getenv("LC_TIME"));
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if (getenv("LANG"))
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lang = pg_strdup(getenv("LANG"));
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if (getenv("LANGUAGE"))
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language = pg_strdup(getenv("LANGUAGE"));
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if (getenv("LC_ALL"))
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lc_all = pg_strdup(getenv("LC_ALL"));
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if (getenv("LC_MESSAGES"))
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lc_messages = pg_strdup(getenv("LC_MESSAGES"));
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pg_putenv("LC_COLLATE", NULL);
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pg_putenv("LC_CTYPE", NULL);
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pg_putenv("LC_MONETARY", NULL);
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pg_putenv("LC_NUMERIC", NULL);
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pg_putenv("LC_TIME", NULL);
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pg_putenv("LANG",
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#ifndef WIN32
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NULL);
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#else
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/* On Windows the default locale cannot be English, so force it */
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"en");
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#endif
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pg_putenv("LANGUAGE", NULL);
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pg_putenv("LC_ALL", NULL);
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pg_putenv("LC_MESSAGES", "C");
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snprintf(cmd, sizeof(cmd), "\"%s/%s \"%s\"",
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cluster->bindir,
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live_check ? "pg_controldata\"" : "pg_resetxlog\" -n",
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cluster->pgdata);
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fflush(stdout);
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fflush(stderr);
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if ((output = popen(cmd, "r")) == NULL)
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pg_fatal("Could not get control data using %s: %s\n",
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cmd, getErrorText(errno));
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/* Only pre-8.4 has these so if they are not set below we will check later */
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cluster->controldata.lc_collate = NULL;
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cluster->controldata.lc_ctype = NULL;
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/* Only in <= 9.2 */
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if (GET_MAJOR_VERSION(cluster->major_version) <= 902)
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{
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cluster->controldata.data_checksum_version = 0;
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got_data_checksum_version = true;
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}
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/* we have the result of cmd in "output". so parse it line by line now */
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while (fgets(bufin, sizeof(bufin), output))
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{
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pg_log(PG_VERBOSE, "%s", bufin);
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if ((p = strstr(bufin, "pg_control version number:")) != NULL)
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{
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p = strchr(p, ':');
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if (p == NULL || strlen(p) <= 1)
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pg_fatal("%d: pg_resetxlog problem\n", __LINE__);
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p++; /* removing ':' char */
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cluster->controldata.ctrl_ver = str2uint(p);
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}
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else if ((p = strstr(bufin, "Catalog version number:")) != NULL)
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{
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p = strchr(p, ':');
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if (p == NULL || strlen(p) <= 1)
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pg_fatal("%d: controldata retrieval problem\n", __LINE__);
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p++; /* removing ':' char */
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cluster->controldata.cat_ver = str2uint(p);
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}
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else if ((p = strstr(bufin, "First log segment after reset:")) != NULL)
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{
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/* Skip the colon and any whitespace after it */
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p = strchr(p, ':');
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if (p == NULL || strlen(p) <= 1)
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pg_fatal("%d: controldata retrieval problem\n", __LINE__);
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p = strpbrk(p, "01234567890ABCDEF");
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if (p == NULL || strlen(p) <= 1)
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pg_fatal("%d: controldata retrieval problem\n", __LINE__);
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/* Make sure it looks like a valid WAL file name */
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if (strspn(p, "0123456789ABCDEF") != 24)
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pg_fatal("%d: controldata retrieval problem\n", __LINE__);
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strlcpy(cluster->controldata.nextxlogfile, p, 25);
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got_nextxlogfile = true;
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}
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else if ((p = strstr(bufin, "First log file ID after reset:")) != NULL)
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{
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p = strchr(p, ':');
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if (p == NULL || strlen(p) <= 1)
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pg_fatal("%d: controldata retrieval problem\n", __LINE__);
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p++; /* removing ':' char */
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logid = str2uint(p);
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got_log_id = true;
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}
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else if ((p = strstr(bufin, "First log file segment after reset:")) != NULL)
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{
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p = strchr(p, ':');
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if (p == NULL || strlen(p) <= 1)
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pg_fatal("%d: controldata retrieval problem\n", __LINE__);
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p++; /* removing ':' char */
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segno = str2uint(p);
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got_log_seg = true;
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}
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else if ((p = strstr(bufin, "Latest checkpoint's TimeLineID:")) != NULL)
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{
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p = strchr(p, ':');
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if (p == NULL || strlen(p) <= 1)
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pg_fatal("%d: controldata retrieval problem\n", __LINE__);
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p++; /* removing ':' char */
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cluster->controldata.chkpnt_tli = str2uint(p);
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got_tli = true;
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}
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else if ((p = strstr(bufin, "Latest checkpoint's NextXID:")) != NULL)
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{
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char *op = strchr(p, '/');
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if (op == NULL)
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op = strchr(p, ':');
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if (op == NULL || strlen(op) <= 1)
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pg_fatal("%d: controldata retrieval problem\n", __LINE__);
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op++; /* removing ':' char */
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cluster->controldata.chkpnt_nxtxid = str2uint(op);
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got_xid = true;
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}
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else if ((p = strstr(bufin, "Latest checkpoint's NextOID:")) != NULL)
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{
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p = strchr(p, ':');
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if (p == NULL || strlen(p) <= 1)
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pg_fatal("%d: controldata retrieval problem\n", __LINE__);
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p++; /* removing ':' char */
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cluster->controldata.chkpnt_nxtoid = str2uint(p);
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got_oid = true;
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}
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else if ((p = strstr(bufin, "Latest checkpoint's NextMultiXactId:")) != NULL)
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{
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p = strchr(p, ':');
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if (p == NULL || strlen(p) <= 1)
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pg_fatal("%d: controldata retrieval problem\n", __LINE__);
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p++; /* removing ':' char */
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cluster->controldata.chkpnt_nxtmulti = str2uint(p);
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got_multi = true;
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}
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else if ((p = strstr(bufin, "Latest checkpoint's oldestMultiXid:")) != NULL)
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{
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p = strchr(p, ':');
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if (p == NULL || strlen(p) <= 1)
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pg_fatal("%d: controldata retrieval problem\n", __LINE__);
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p++; /* removing ':' char */
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cluster->controldata.chkpnt_oldstMulti = str2uint(p);
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got_oldestmulti = true;
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}
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else if ((p = strstr(bufin, "Latest checkpoint's NextMultiOffset:")) != NULL)
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{
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p = strchr(p, ':');
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if (p == NULL || strlen(p) <= 1)
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pg_fatal("%d: controldata retrieval problem\n", __LINE__);
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p++; /* removing ':' char */
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cluster->controldata.chkpnt_nxtmxoff = str2uint(p);
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got_mxoff = true;
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}
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else if ((p = strstr(bufin, "Maximum data alignment:")) != NULL)
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{
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p = strchr(p, ':');
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if (p == NULL || strlen(p) <= 1)
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pg_fatal("%d: controldata retrieval problem\n", __LINE__);
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p++; /* removing ':' char */
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cluster->controldata.align = str2uint(p);
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got_align = true;
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}
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else if ((p = strstr(bufin, "Database block size:")) != NULL)
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{
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p = strchr(p, ':');
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if (p == NULL || strlen(p) <= 1)
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pg_fatal("%d: controldata retrieval problem\n", __LINE__);
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p++; /* removing ':' char */
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cluster->controldata.blocksz = str2uint(p);
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got_blocksz = true;
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}
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else if ((p = strstr(bufin, "Blocks per segment of large relation:")) != NULL)
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{
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p = strchr(p, ':');
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if (p == NULL || strlen(p) <= 1)
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pg_fatal("%d: controldata retrieval problem\n", __LINE__);
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p++; /* removing ':' char */
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cluster->controldata.largesz = str2uint(p);
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got_largesz = true;
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}
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else if ((p = strstr(bufin, "WAL block size:")) != NULL)
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{
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p = strchr(p, ':');
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if (p == NULL || strlen(p) <= 1)
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pg_fatal("%d: controldata retrieval problem\n", __LINE__);
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p++; /* removing ':' char */
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cluster->controldata.walsz = str2uint(p);
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got_walsz = true;
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}
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else if ((p = strstr(bufin, "Bytes per WAL segment:")) != NULL)
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{
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p = strchr(p, ':');
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if (p == NULL || strlen(p) <= 1)
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pg_fatal("%d: controldata retrieval problem\n", __LINE__);
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p++; /* removing ':' char */
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cluster->controldata.walseg = str2uint(p);
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got_walseg = true;
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}
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else if ((p = strstr(bufin, "Maximum length of identifiers:")) != NULL)
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{
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p = strchr(p, ':');
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if (p == NULL || strlen(p) <= 1)
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pg_fatal("%d: controldata retrieval problem\n", __LINE__);
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p++; /* removing ':' char */
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cluster->controldata.ident = str2uint(p);
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got_ident = true;
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}
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else if ((p = strstr(bufin, "Maximum columns in an index:")) != NULL)
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{
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p = strchr(p, ':');
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if (p == NULL || strlen(p) <= 1)
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pg_fatal("%d: controldata retrieval problem\n", __LINE__);
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p++; /* removing ':' char */
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cluster->controldata.index = str2uint(p);
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got_index = true;
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}
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else if ((p = strstr(bufin, "Maximum size of a TOAST chunk:")) != NULL)
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{
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p = strchr(p, ':');
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if (p == NULL || strlen(p) <= 1)
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pg_fatal("%d: controldata retrieval problem\n", __LINE__);
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p++; /* removing ':' char */
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cluster->controldata.toast = str2uint(p);
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got_toast = true;
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}
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else if ((p = strstr(bufin, "Date/time type storage:")) != NULL)
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{
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p = strchr(p, ':');
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if (p == NULL || strlen(p) <= 1)
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pg_fatal("%d: controldata retrieval problem\n", __LINE__);
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p++; /* removing ':' char */
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cluster->controldata.date_is_int = strstr(p, "64-bit integers") != NULL;
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got_date_is_int = true;
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}
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else if ((p = strstr(bufin, "Float8 argument passing:")) != NULL)
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{
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p = strchr(p, ':');
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if (p == NULL || strlen(p) <= 1)
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pg_fatal("%d: controldata retrieval problem\n", __LINE__);
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p++; /* removing ':' char */
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/* used later for contrib check */
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cluster->controldata.float8_pass_by_value = strstr(p, "by value") != NULL;
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got_float8_pass_by_value = true;
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}
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else if ((p = strstr(bufin, "checksum")) != NULL)
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{
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p = strchr(p, ':');
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if (p == NULL || strlen(p) <= 1)
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pg_fatal("%d: controldata retrieval problem\n", __LINE__);
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p++; /* removing ':' char */
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/* used later for contrib check */
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cluster->controldata.data_checksum_version = str2uint(p);
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got_data_checksum_version = true;
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}
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/* In pre-8.4 only */
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else if ((p = strstr(bufin, "LC_COLLATE:")) != NULL)
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{
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p = strchr(p, ':');
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if (p == NULL || strlen(p) <= 1)
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pg_fatal("%d: controldata retrieval problem\n", __LINE__);
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p++; /* removing ':' char */
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/* skip leading spaces and remove trailing newline */
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p += strspn(p, " ");
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if (strlen(p) > 0 && *(p + strlen(p) - 1) == '\n')
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*(p + strlen(p) - 1) = '\0';
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cluster->controldata.lc_collate = pg_strdup(p);
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}
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/* In pre-8.4 only */
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else if ((p = strstr(bufin, "LC_CTYPE:")) != NULL)
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{
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p = strchr(p, ':');
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if (p == NULL || strlen(p) <= 1)
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pg_fatal("%d: controldata retrieval problem\n", __LINE__);
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p++; /* removing ':' char */
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/* skip leading spaces and remove trailing newline */
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p += strspn(p, " ");
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if (strlen(p) > 0 && *(p + strlen(p) - 1) == '\n')
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*(p + strlen(p) - 1) = '\0';
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cluster->controldata.lc_ctype = pg_strdup(p);
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}
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}
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if (output)
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pclose(output);
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/*
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* Restore environment variables
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*/
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pg_putenv("LC_COLLATE", lc_collate);
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pg_putenv("LC_CTYPE", lc_ctype);
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pg_putenv("LC_MONETARY", lc_monetary);
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pg_putenv("LC_NUMERIC", lc_numeric);
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pg_putenv("LC_TIME", lc_time);
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pg_putenv("LANG", lang);
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pg_putenv("LANGUAGE", language);
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pg_putenv("LC_ALL", lc_all);
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pg_putenv("LC_MESSAGES", lc_messages);
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pg_free(lc_collate);
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pg_free(lc_ctype);
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pg_free(lc_monetary);
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pg_free(lc_numeric);
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pg_free(lc_time);
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pg_free(lang);
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pg_free(language);
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pg_free(lc_all);
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pg_free(lc_messages);
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/*
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* Before 9.3, pg_resetxlog reported the xlogid and segno of the first log
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* file after reset as separate lines. Starting with 9.3, it reports the
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* WAL file name. If the old cluster is older than 9.3, we construct the
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* WAL file name from the xlogid and segno.
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*/
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if (GET_MAJOR_VERSION(cluster->major_version) <= 902)
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{
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if (got_log_id && got_log_seg)
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{
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snprintf(cluster->controldata.nextxlogfile, 25, "%08X%08X%08X",
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tli, logid, segno);
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got_nextxlogfile = true;
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}
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}
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/* verify that we got all the mandatory pg_control data */
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if (!got_xid || !got_oid ||
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!got_multi || !got_mxoff ||
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(!got_oldestmulti &&
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cluster->controldata.cat_ver >= MULTIXACT_FORMATCHANGE_CAT_VER) ||
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(!live_check && !got_nextxlogfile) ||
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!got_tli ||
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!got_align || !got_blocksz || !got_largesz || !got_walsz ||
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!got_walseg || !got_ident || !got_index || !got_toast ||
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!got_date_is_int || !got_float8_pass_by_value || !got_data_checksum_version)
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{
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pg_log(PG_REPORT,
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"The %s cluster lacks some required control information:\n",
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CLUSTER_NAME(cluster));
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if (!got_xid)
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pg_log(PG_REPORT, " checkpoint next XID\n");
|
|
|
|
if (!got_oid)
|
|
pg_log(PG_REPORT, " latest checkpoint next OID\n");
|
|
|
|
if (!got_multi)
|
|
pg_log(PG_REPORT, " latest checkpoint next MultiXactId\n");
|
|
|
|
if (!got_mxoff)
|
|
pg_log(PG_REPORT, " latest checkpoint next MultiXactOffset\n");
|
|
|
|
if (!got_oldestmulti &&
|
|
cluster->controldata.cat_ver >= MULTIXACT_FORMATCHANGE_CAT_VER)
|
|
pg_log(PG_REPORT, " latest checkpoint oldest MultiXactId\n");
|
|
|
|
if (!live_check && !got_nextxlogfile)
|
|
pg_log(PG_REPORT, " first WAL segment after reset\n");
|
|
|
|
if (!got_tli)
|
|
pg_log(PG_REPORT, " latest checkpoint timeline ID\n");
|
|
|
|
if (!got_align)
|
|
pg_log(PG_REPORT, " maximum alignment\n");
|
|
|
|
if (!got_blocksz)
|
|
pg_log(PG_REPORT, " block size\n");
|
|
|
|
if (!got_largesz)
|
|
pg_log(PG_REPORT, " large relation segment size\n");
|
|
|
|
if (!got_walsz)
|
|
pg_log(PG_REPORT, " WAL block size\n");
|
|
|
|
if (!got_walseg)
|
|
pg_log(PG_REPORT, " WAL segment size\n");
|
|
|
|
if (!got_ident)
|
|
pg_log(PG_REPORT, " maximum identifier length\n");
|
|
|
|
if (!got_index)
|
|
pg_log(PG_REPORT, " maximum number of indexed columns\n");
|
|
|
|
if (!got_toast)
|
|
pg_log(PG_REPORT, " maximum TOAST chunk size\n");
|
|
|
|
if (!got_date_is_int)
|
|
pg_log(PG_REPORT, " dates/times are integers?\n");
|
|
|
|
if (!got_float8_pass_by_value)
|
|
pg_log(PG_REPORT, " float8 argument passing method\n");
|
|
|
|
/* value added in Postgres 9.3 */
|
|
if (!got_data_checksum_version)
|
|
pg_log(PG_REPORT, " data checksum version\n");
|
|
|
|
pg_fatal("Cannot continue without required control information, terminating\n");
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* check_control_data()
|
|
*
|
|
* check to make sure the control data settings are compatible
|
|
*/
|
|
void
|
|
check_control_data(ControlData *oldctrl,
|
|
ControlData *newctrl)
|
|
{
|
|
if (oldctrl->align == 0 || oldctrl->align != newctrl->align)
|
|
pg_fatal("old and new pg_controldata alignments are invalid or do not match\n"
|
|
"Likely one cluster is a 32-bit install, the other 64-bit\n");
|
|
|
|
if (oldctrl->blocksz == 0 || oldctrl->blocksz != newctrl->blocksz)
|
|
pg_fatal("old and new pg_controldata block sizes are invalid or do not match\n");
|
|
|
|
if (oldctrl->largesz == 0 || oldctrl->largesz != newctrl->largesz)
|
|
pg_fatal("old and new pg_controldata maximum relation segement sizes are invalid or do not match\n");
|
|
|
|
if (oldctrl->walsz == 0 || oldctrl->walsz != newctrl->walsz)
|
|
pg_fatal("old and new pg_controldata WAL block sizes are invalid or do not match\n");
|
|
|
|
if (oldctrl->walseg == 0 || oldctrl->walseg != newctrl->walseg)
|
|
pg_fatal("old and new pg_controldata WAL segment sizes are invalid or do not match\n");
|
|
|
|
if (oldctrl->ident == 0 || oldctrl->ident != newctrl->ident)
|
|
pg_fatal("old and new pg_controldata maximum identifier lengths are invalid or do not match\n");
|
|
|
|
if (oldctrl->index == 0 || oldctrl->index != newctrl->index)
|
|
pg_fatal("old and new pg_controldata maximum indexed columns are invalid or do not match\n");
|
|
|
|
if (oldctrl->toast == 0 || oldctrl->toast != newctrl->toast)
|
|
pg_fatal("old and new pg_controldata maximum TOAST chunk sizes are invalid or do not match\n");
|
|
|
|
if (oldctrl->date_is_int != newctrl->date_is_int)
|
|
pg_fatal("old and new pg_controldata date/time storage types do not match\n");
|
|
|
|
/*
|
|
* We might eventually allow upgrades from checksum to no-checksum
|
|
* clusters.
|
|
*/
|
|
if (oldctrl->data_checksum_version != newctrl->data_checksum_version)
|
|
{
|
|
pg_fatal("old and new pg_controldata checksum versions are invalid or do not match\n");
|
|
}
|
|
}
|
|
|
|
|
|
void
|
|
disable_old_cluster(void)
|
|
{
|
|
char old_path[MAXPGPATH],
|
|
new_path[MAXPGPATH];
|
|
|
|
/* rename pg_control so old server cannot be accidentally started */
|
|
prep_status("Adding \".old\" suffix to old global/pg_control");
|
|
|
|
snprintf(old_path, sizeof(old_path), "%s/global/pg_control", old_cluster.pgdata);
|
|
snprintf(new_path, sizeof(new_path), "%s/global/pg_control.old", old_cluster.pgdata);
|
|
if (pg_mv_file(old_path, new_path) != 0)
|
|
pg_fatal("Unable to rename %s to %s.\n", old_path, new_path);
|
|
check_ok();
|
|
|
|
pg_log(PG_REPORT, "\n"
|
|
"If you want to start the old cluster, you will need to remove\n"
|
|
"the \".old\" suffix from %s/global/pg_control.old.\n"
|
|
"Because \"link\" mode was used, the old cluster cannot be safely\n"
|
|
"started once the new cluster has been started.\n\n", old_cluster.pgdata);
|
|
}
|