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sake of brevity and clarity. Make pg_reload_conf(), pg_rotate_logfile(), and pg_cancel_backend() return a boolean rather than an integer to indicate success or failure. Along the way, make some minor cleanups to dbsize.c -- in particular, use elog() rather than ereport() for "shouldn't happen" error conditions, and remove some of the more flagrant violations of the Postgres indentation conventions. Catalog version bumped.
461 lines
11 KiB
C
461 lines
11 KiB
C
/*
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* dbsize.c
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* object size functions
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*
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* Copyright (c) 2002-2005, PostgreSQL Global Development Group
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/utils/adt/dbsize.c,v 1.4 2005/09/16 05:35:40 neilc Exp $
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*
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*/
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#include "postgres.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#include "access/heapam.h"
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#include "catalog/namespace.h"
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#include "catalog/pg_tablespace.h"
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#include "commands/dbcommands.h"
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#include "commands/tablespace.h"
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#include "miscadmin.h"
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#include "storage/fd.h"
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#include "utils/builtins.h"
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#include "utils/syscache.h"
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#include "utils/relcache.h"
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/* Return physical size of directory contents, or 0 if dir doesn't exist */
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static int64
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db_dir_size(const char *path)
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{
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int64 dirsize = 0;
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struct dirent *direntry;
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DIR *dirdesc;
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char filename[MAXPGPATH];
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dirdesc = AllocateDir(path);
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if (!dirdesc)
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return 0;
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while ((direntry = ReadDir(dirdesc, path)) != NULL)
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{
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struct stat fst;
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if (strcmp(direntry->d_name, ".") == 0 ||
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strcmp(direntry->d_name, "..") == 0)
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continue;
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snprintf(filename, MAXPGPATH, "%s/%s", path, direntry->d_name);
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if (stat(filename, &fst) < 0)
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ereport(ERROR,
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(errcode_for_file_access(),
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errmsg("could not stat \"%s\": %m", filename)));
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dirsize += fst.st_size;
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}
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FreeDir(dirdesc);
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return dirsize;
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}
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/*
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* calculate size of database in all tablespaces
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*/
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static int64
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calculate_database_size(Oid dbOid)
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{
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int64 totalsize;
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DIR *dirdesc;
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struct dirent *direntry;
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char dirpath[MAXPGPATH];
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char pathname[MAXPGPATH];
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/* Shared storage in pg_global is not counted */
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/* Include pg_default storage */
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snprintf(pathname, MAXPGPATH, "%s/base/%u", DataDir, dbOid);
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totalsize = db_dir_size(pathname);
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/* Scan the non-default tablespaces */
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snprintf(dirpath, MAXPGPATH, "%s/pg_tblspc", DataDir);
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dirdesc = AllocateDir(dirpath);
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if (!dirdesc)
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ereport(ERROR,
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(errcode_for_file_access(),
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errmsg("could not open tablespace directory \"%s\": %m",
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dirpath)));
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while ((direntry = ReadDir(dirdesc, dirpath)) != NULL)
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{
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if (strcmp(direntry->d_name, ".") == 0 ||
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strcmp(direntry->d_name, "..") == 0)
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continue;
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snprintf(pathname, MAXPGPATH, "%s/pg_tblspc/%s/%u",
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DataDir, direntry->d_name, dbOid);
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totalsize += db_dir_size(pathname);
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}
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FreeDir(dirdesc);
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/* Complain if we found no trace of the DB at all */
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if (!totalsize)
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ereport(ERROR,
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(ERRCODE_UNDEFINED_DATABASE,
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errmsg("database with OID %u does not exist", dbOid)));
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return totalsize;
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}
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Datum
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pg_database_size_oid(PG_FUNCTION_ARGS)
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{
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Oid dbOid = PG_GETARG_OID(0);
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PG_RETURN_INT64(calculate_database_size(dbOid));
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}
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Datum
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pg_database_size_name(PG_FUNCTION_ARGS)
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{
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Name dbName = PG_GETARG_NAME(0);
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Oid dbOid = get_database_oid(NameStr(*dbName));
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if (!OidIsValid(dbOid))
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ereport(ERROR,
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(errcode(ERRCODE_UNDEFINED_DATABASE),
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errmsg("database \"%s\" does not exist",
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NameStr(*dbName))));
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PG_RETURN_INT64(calculate_database_size(dbOid));
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}
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/*
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* calculate total size of tablespace
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*/
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static int64
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calculate_tablespace_size(Oid tblspcOid)
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{
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char tblspcPath[MAXPGPATH];
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char pathname[MAXPGPATH];
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int64 totalsize=0;
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DIR *dirdesc;
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struct dirent *direntry;
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if (tblspcOid == DEFAULTTABLESPACE_OID)
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snprintf(tblspcPath, MAXPGPATH, "%s/base", DataDir);
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else if (tblspcOid == GLOBALTABLESPACE_OID)
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snprintf(tblspcPath, MAXPGPATH, "%s/global", DataDir);
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else
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snprintf(tblspcPath, MAXPGPATH, "%s/pg_tblspc/%u", DataDir, tblspcOid);
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dirdesc = AllocateDir(tblspcPath);
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if (!dirdesc)
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ereport(ERROR,
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(errcode_for_file_access(),
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errmsg("could not open tablespace directory \"%s\": %m",
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tblspcPath)));
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while ((direntry = ReadDir(dirdesc, tblspcPath)) != NULL)
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{
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struct stat fst;
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if (strcmp(direntry->d_name, ".") == 0 ||
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strcmp(direntry->d_name, "..") == 0)
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continue;
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snprintf(pathname, MAXPGPATH, "%s/%s", tblspcPath, direntry->d_name);
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if (stat(pathname, &fst) < 0)
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ereport(ERROR,
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(errcode_for_file_access(),
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errmsg("could not stat \"%s\": %m", pathname)));
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if (fst.st_mode & S_IFDIR)
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totalsize += db_dir_size(pathname);
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totalsize += fst.st_size;
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}
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FreeDir(dirdesc);
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return totalsize;
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}
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Datum
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pg_tablespace_size_oid(PG_FUNCTION_ARGS)
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{
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Oid tblspcOid = PG_GETARG_OID(0);
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PG_RETURN_INT64(calculate_tablespace_size(tblspcOid));
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}
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Datum
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pg_tablespace_size_name(PG_FUNCTION_ARGS)
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{
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Name tblspcName = PG_GETARG_NAME(0);
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Oid tblspcOid = get_tablespace_oid(NameStr(*tblspcName));
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if (!OidIsValid(tblspcOid))
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ereport(ERROR,
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(errcode(ERRCODE_UNDEFINED_OBJECT),
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errmsg("tablespace \"%s\" does not exist",
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NameStr(*tblspcName))));
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PG_RETURN_INT64(calculate_tablespace_size(tblspcOid));
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}
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/*
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* calculate size of a relation
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*/
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static int64
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calculate_relation_size(Oid tblspcOid, Oid relnodeOid)
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{
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int64 totalsize=0;
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unsigned int segcount=0;
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char dirpath[MAXPGPATH];
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char pathname[MAXPGPATH];
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if (!tblspcOid)
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tblspcOid = MyDatabaseTableSpace;
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if (tblspcOid == DEFAULTTABLESPACE_OID)
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snprintf(dirpath, MAXPGPATH, "%s/base/%u", DataDir, MyDatabaseId);
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else if (tblspcOid == GLOBALTABLESPACE_OID)
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snprintf(dirpath, MAXPGPATH, "%s/global", DataDir);
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else
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snprintf(dirpath, MAXPGPATH, "%s/pg_tblspc/%u/%u",
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DataDir, tblspcOid, MyDatabaseId);
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for (segcount = 0 ;; segcount++)
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{
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struct stat fst;
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if (segcount == 0)
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snprintf(pathname, MAXPGPATH, "%s/%u",
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dirpath, relnodeOid);
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else
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snprintf(pathname, MAXPGPATH, "%s/%u.%u",
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dirpath, relnodeOid, segcount);
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if (stat(pathname, &fst) < 0)
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{
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if (errno == ENOENT)
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break;
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else
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ereport(ERROR,
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(errcode_for_file_access(),
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errmsg("could not stat \"%s\": %m", pathname)));
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}
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totalsize += fst.st_size;
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}
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return totalsize;
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}
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Datum
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pg_relation_size_oid(PG_FUNCTION_ARGS)
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{
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Oid relOid=PG_GETARG_OID(0);
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HeapTuple tuple;
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Form_pg_class pg_class;
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Oid relnodeOid;
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Oid tblspcOid;
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tuple = SearchSysCache(RELOID,
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ObjectIdGetDatum(relOid),
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0, 0, 0);
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if (!HeapTupleIsValid(tuple))
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elog(ERROR, "cache lookup failed for relation %u", relOid);
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pg_class = (Form_pg_class) GETSTRUCT(tuple);
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relnodeOid = pg_class->relfilenode;
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tblspcOid = pg_class->reltablespace;
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ReleaseSysCache(tuple);
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PG_RETURN_INT64(calculate_relation_size(tblspcOid, relnodeOid));
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}
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Datum
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pg_relation_size_name(PG_FUNCTION_ARGS)
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{
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text *relname = PG_GETARG_TEXT_P(0);
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RangeVar *relrv;
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Relation relation;
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Oid relnodeOid;
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Oid tblspcOid;
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relrv = makeRangeVarFromNameList(textToQualifiedNameList(relname));
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relation = relation_openrv(relrv, AccessShareLock);
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tblspcOid = relation->rd_rel->reltablespace;
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relnodeOid = relation->rd_rel->relfilenode;
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relation_close(relation, AccessShareLock);
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PG_RETURN_INT64(calculate_relation_size(tblspcOid, relnodeOid));
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}
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/*
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* Compute the on-disk size of files for 'relation' according to the
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* stat function, optionally including heap data, index data, and/or
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* toast data.
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*/
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static int64
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calculate_total_relation_size(Oid tblspcOid, Oid relnodeOid)
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{
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Relation heapRelation;
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Relation idxRelation;
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Relation toastRelation;
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Oid idxOid;
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Oid idxTblspcOid;
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Oid toastOid;
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Oid toastTblspcOid;
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bool hasIndices;
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int64 size;
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List *indexoidlist;
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ListCell *idx;
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heapRelation = relation_open(relnodeOid, AccessShareLock);
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toastOid = heapRelation->rd_rel->reltoastrelid;
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hasIndices = heapRelation->rd_rel->relhasindex;
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/* Get the heap size */
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size = calculate_relation_size(tblspcOid, relnodeOid);
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/* Get index size */
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if (hasIndices)
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{
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/* recursively include any dependent indexes */
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indexoidlist = RelationGetIndexList(heapRelation);
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foreach(idx, indexoidlist)
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{
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idxOid = lfirst_oid(idx);
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idxRelation = relation_open(idxOid, AccessShareLock);
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idxTblspcOid = idxRelation->rd_rel->reltablespace;
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size += calculate_relation_size(idxTblspcOid, idxOid);
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relation_close(idxRelation, AccessShareLock);
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}
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list_free(indexoidlist);
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}
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relation_close(heapRelation, AccessShareLock);
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/* Get toast table size */
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if (toastOid != 0)
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{
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/* recursively include any toast relations */
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toastRelation = relation_open(toastOid, AccessShareLock);
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toastTblspcOid = toastRelation->rd_rel->reltablespace;
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size += calculate_relation_size(toastTblspcOid, toastOid);
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relation_close(toastRelation, AccessShareLock);
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}
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return size;
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}
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/*
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* Compute on-disk size of files for 'relation' including
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* heap data, index data, and toasted data.
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*/
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Datum
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pg_total_relation_size_oid(PG_FUNCTION_ARGS)
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{
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Oid relOid=PG_GETARG_OID(0);
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HeapTuple tuple;
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Form_pg_class pg_class;
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Oid relnodeOid;
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Oid tblspcOid;
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tuple = SearchSysCache(RELOID,
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ObjectIdGetDatum(relOid),
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0, 0, 0);
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if (!HeapTupleIsValid(tuple))
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elog(ERROR, "cache lookup failed for relation %u", relOid);
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pg_class = (Form_pg_class) GETSTRUCT(tuple);
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relnodeOid = pg_class->relfilenode;
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tblspcOid = pg_class->reltablespace;
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ReleaseSysCache(tuple);
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PG_RETURN_INT64(calculate_total_relation_size(tblspcOid, relnodeOid));
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}
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Datum
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pg_total_relation_size_name(PG_FUNCTION_ARGS)
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{
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text *relname = PG_GETARG_TEXT_P(0);
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RangeVar *relrv;
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Relation relation;
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Oid relnodeOid;
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Oid tblspcOid;
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relrv = makeRangeVarFromNameList(textToQualifiedNameList(relname));
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relation = relation_openrv(relrv, AccessShareLock);
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tblspcOid = relation->rd_rel->reltablespace;
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relnodeOid = relation->rd_rel->relfilenode;
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relation_close(relation, AccessShareLock);
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PG_RETURN_INT64(calculate_total_relation_size(tblspcOid, relnodeOid));
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}
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/*
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* formatting with size units
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*/
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Datum
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pg_size_pretty(PG_FUNCTION_ARGS)
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{
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int64 size=PG_GETARG_INT64(0);
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char *result=palloc(50+VARHDRSZ);
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int64 limit = 10*1024;
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int64 mult=1;
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if (size < limit*mult)
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snprintf(VARDATA(result), 50, INT64_FORMAT" bytes",
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size);
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else
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{
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mult *= 1024;
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if (size < limit*mult)
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snprintf(VARDATA(result), 50, INT64_FORMAT " kB",
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(size+mult/2) / mult);
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else
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{
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mult *= 1024;
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if (size < limit*mult)
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snprintf(VARDATA(result), 50, INT64_FORMAT " MB",
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(size+mult/2) / mult);
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else
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{
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mult *= 1024;
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if (size < limit*mult)
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snprintf(VARDATA(result), 50, INT64_FORMAT " GB",
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(size+mult/2) / mult);
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else
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{
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mult *= 1024;
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snprintf(VARDATA(result), 50, INT64_FORMAT " TB",
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(size+mult/2) / mult);
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}
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}
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}
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}
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VARATT_SIZEP(result) = strlen(VARDATA(result)) + VARHDRSZ;
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PG_RETURN_TEXT_P(result);
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}
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