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libpgcommon is a new static library to allow sharing code among the various frontend programs and backend; this lets us eliminate duplicate implementations of common routines. We avoid libpgport, because that's intended as a place for porting issues; per discussion, it seems better to keep them separate. The first use case, and the only implemented by this patch, is pg_malloc and friends, which many frontend programs were already using. At the same time, we can use this to provide palloc emulation functions for the frontend; this way, some palloc-using files in the backend can also be used by the frontend cleanly. To do this, we change palloc() in the backend to be a function instead of a macro on top of MemoryContextAlloc(). This was previously believed to cause loss of performance, but this implementation has been tweaked by Tom and Andres so that on modern compilers it provides a slight improvement over the previous one. This lets us clean up some places that were already with localized hacks. Most of the pg_malloc/palloc changes in this patch were authored by Andres Freund. Zoltán Böszörményi also independently provided a form of that. libpgcommon infrastructure was authored by Álvaro.
621 lines
18 KiB
C
621 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) 2010-2013, 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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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), SYSTEMQUOTE "\"%s/%s \"%s\"" SYSTEMQUOTE,
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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_log(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 <= 8.3 */
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if (GET_MAJOR_VERSION(cluster->major_version) <= 803)
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{
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cluster->controldata.float8_pass_by_value = false;
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got_float8_pass_by_value = 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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#ifdef WIN32
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/*
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* Due to an installer bug, LANG=C doesn't work for PG 8.3.3, but does
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* work 8.2.6 and 8.3.7, so check for non-ASCII output and suggest a
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* minor upgrade.
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*/
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if (GET_MAJOR_VERSION(cluster->major_version) <= 803)
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{
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for (p = bufin; *p; p++)
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if (!isascii(*p))
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pg_log(PG_FATAL,
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"The 8.3 cluster's pg_controldata is incapable of outputting ASCII, even\n"
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"with LANG=C. You must upgrade this cluster to a newer version of PostgreSQL\n"
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"8.3 to fix this bug. PostgreSQL 8.3.7 and later are known to work properly.\n");
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}
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#endif
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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_log(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_log(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_log(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_log(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_log(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_log(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_log(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_log(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_log(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_log(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_log(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_log(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_log(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_log(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_log(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_log(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_log(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_log(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_log(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_log(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_log(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_log(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_log(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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/* 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_log(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_log(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
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* log file after reset as separate lines. Starting with 9.3, it reports
|
|
* the WAL file name. If the old cluster is older than 9.3, we construct
|
|
* the WAL file name from the xlogid and segno.
|
|
*/
|
|
if (GET_MAJOR_VERSION(cluster->major_version) <= 902)
|
|
{
|
|
if (got_log_id && got_log_seg)
|
|
{
|
|
snprintf(cluster->controldata.nextxlogfile, 25, "%08X%08X%08X",
|
|
tli, logid, segno);
|
|
got_nextxlogfile = true;
|
|
}
|
|
}
|
|
|
|
/* verify that we got all the mandatory pg_control data */
|
|
if (!got_xid || !got_oid ||
|
|
!got_multi || !got_mxoff ||
|
|
(!got_oldestmulti && cluster->controldata.cat_ver >= MULTIXACT_FORMATCHANGE_CAT_VER) ||
|
|
(!live_check && !got_nextxlogfile) ||
|
|
!got_tli ||
|
|
!got_align || !got_blocksz || !got_largesz || !got_walsz ||
|
|
!got_walseg || !got_ident || !got_index || !got_toast ||
|
|
!got_date_is_int || !got_float8_pass_by_value)
|
|
{
|
|
pg_log(PG_REPORT,
|
|
"The %s cluster lacks some required control information:\n",
|
|
CLUSTER_NAME(cluster));
|
|
|
|
if (!got_xid)
|
|
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");
|
|
|
|
/* value added in Postgres 8.4 */
|
|
if (!got_float8_pass_by_value)
|
|
pg_log(PG_REPORT, " float8 argument passing method\n");
|
|
|
|
pg_log(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_log(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_log(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_log(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_log(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_log(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_log(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_log(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_log(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_log(PG_WARNING,
|
|
"\nOld and new pg_controldata date/time storage types do not match.\n");
|
|
|
|
/*
|
|
* This is a common 8.3 -> 8.4 upgrade problem, so we are more verbose
|
|
*/
|
|
pg_log(PG_FATAL,
|
|
"You will need to rebuild the new server with configure option\n"
|
|
"--disable-integer-datetimes or get server binaries built with those\n"
|
|
"options.\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_log(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);
|
|
}
|