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Code review for GRANT CONNECT patch. Spell the privilege as CONNECT not

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CONNECTION, fix a number of places that were missed (eg pg_dump support),
avoid executing an extra search of pg_database during startup.
This commit is contained in:
Tom Lane 2006-04-30 21:15:33 +00:00
parent 986085a7f0
commit 82a2881c5b
12 changed files with 118 additions and 81 deletions
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15
doc/src/sgml/client-auth.sgml
View File

@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/client-auth.sgml,v 1.88 2006/04/30 02:09:06 momjian Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/client-auth.sgml,v 1.89 2006/04/30 21:15:32 tgl Exp $ -->
<chapter id="client-authentication">
<title>Client Authentication</title>
@ -206,8 +206,6 @@ hostnossl <replaceable>database</replaceable> <replaceable>user</replaceable>
Multiple user names can be supplied by separating them with commas.
A separate file containing user names can be specified by preceding the
file name with <literal>@</>.
User and group connectivity can also be restricted by <command>GRANT
CONNECTION ON DATABASE</>.
</para>
</listitem>
</varlistentry>
@ -436,6 +434,17 @@ hostnossl <replaceable>database</replaceable> <replaceable>user</replaceable>
re-read the file.
</para>
<tip>
<para>
To connect to a particular database, a user must not only pass the
<filename>pg_hba.conf</filename> checks, but must have the
<literal>CONNECT</> privilege for the database. If you wish to
restrict which users can connect to which databases, it's usually
easier to control this by granting/revoking <literal>CONNECT</> privilege
than to put the rules into <filename>pg_hba.conf</filename> entries.
</para>
</tip>
<para>
Some examples of <filename>pg_hba.conf</filename> entries are shown in
<xref linkend="example-pg-hba.conf">. See the next section for details on the

7
doc/src/sgml/ddl.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/ddl.sgml,v 1.56 2006/04/23 03:39:50 momjian Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/ddl.sgml,v 1.57 2006/04/30 21:15:32 tgl Exp $ -->
<chapter id="ddl">
<title>Data Definition</title>
@ -1343,8 +1343,9 @@ ALTER TABLE products RENAME TO items;
There are several different privileges: <literal>SELECT</>,
<literal>INSERT</>, <literal>UPDATE</>, <literal>DELETE</>,
<literal>RULE</>, <literal>REFERENCES</>, <literal>TRIGGER</>,
<literal>CREATE</>, <literal>TEMPORARY</>, <literal>EXECUTE</>, and
<literal>USAGE</>. The privileges applicable to a particular
<literal>CREATE</>, <literal>CONNECT</>, <literal>TEMPORARY</>,
<literal>EXECUTE</>, and <literal>USAGE</>.
The privileges applicable to a particular
object vary depending on the object's type (table, function, etc).
For complete information on the different types of privileges
supported by <productname>PostgreSQL</productname>, refer to the

3
doc/src/sgml/func.sgml
View File

@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.315 2006/04/25 00:25:15 momjian Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.316 2006/04/30 21:15:32 tgl Exp $ -->
<chapter id="functions">
<title>Functions and Operators</title>
@ -9227,6 +9227,7 @@ SELECT has_table_privilege('myschema.mytable', 'select');
arguments are analogous to <function>has_table_privilege</function>.
The desired access privilege type must evaluate to
<literal>CREATE</literal>,
<literal>CONNECT</literal>,
<literal>TEMPORARY</literal>, or
<literal>TEMP</literal> (which is equivalent to
<literal>TEMPORARY</literal>).

18
doc/src/sgml/ref/grant.sgml
View File

@ -1,5 +1,5 @@
<!--
$PostgreSQL: pgsql/doc/src/sgml/ref/grant.sgml,v 1.53 2006/04/30 02:09:06 momjian Exp $
$PostgreSQL: pgsql/doc/src/sgml/ref/grant.sgml,v 1.54 2006/04/30 21:15:33 tgl Exp $
PostgreSQL documentation
-->
@ -30,7 +30,7 @@ GRANT { { USAGE | SELECT | UPDATE }
ON SEQUENCE <replaceable class="PARAMETER">sequencename</replaceable> [, ...]
TO { <replaceable class="PARAMETER">username</replaceable> | GROUP <replaceable class="PARAMETER">groupname</replaceable> | PUBLIC } [, ...] [ WITH GRANT OPTION ]
GRANT { { CREATE | TEMPORARY | TEMP | CONNECTION } [,...] | ALL [ PRIVILEGES ] }
GRANT { { CREATE | CONNECT | TEMPORARY | TEMP } [,...] | ALL [ PRIVILEGES ] }
ON DATABASE <replaceable>dbname</replaceable> [, ...]
TO { <replaceable class="PARAMETER">username</replaceable> | GROUP <replaceable class="PARAMETER">groupname</replaceable> | PUBLIC } [, ...] [ WITH GRANT OPTION ]
@ -118,7 +118,8 @@ GRANT <replaceable class="PARAMETER">role</replaceable> [, ...]
Depending on the type of object, the initial default privileges may
include granting some privileges to <literal>PUBLIC</literal>.
The default is no public access for tables, schemas, and tablespaces;
<literal>TEMP</> table creation privilege for databases;
<literal>CONNECT</> privilege and <literal>TEMP</> table creation privilege
for databases;
<literal>EXECUTE</> privilege for functions; and
<literal>USAGE</> privilege for languages.
The object owner may of course revoke these privileges. (For maximum
@ -230,13 +231,12 @@ GRANT <replaceable class="PARAMETER">role</replaceable> [, ...]
</varlistentry>
<varlistentry>
<term>CONNECTION</term>
<term>CONNECT</term>
<listitem>
<para>
Allows the ability to connect to the specified database.
By default, Grant permissions allow users to connect to any database,
though <filename>pg_hba.conf</> can add additional connection
restrictions.
Allows the user to connect to the specified database. This
privilege is checked at connection startup (in addition to checking
any restrictions imposed by <filename>pg_hba.conf</>).
</para>
</listitem>
</varlistentry>
@ -429,7 +429,7 @@ GRANT <replaceable class="PARAMETER">role</replaceable> [, ...]
X -- EXECUTE
U -- USAGE
C -- CREATE
c -- CONNECTION
c -- CONNECT
T -- TEMPORARY
arwdRxt -- ALL PRIVILEGES (for tables)
* -- grant option for preceding privilege

4
doc/src/sgml/ref/revoke.sgml
View File

@ -1,5 +1,5 @@
<!--
$PostgreSQL: pgsql/doc/src/sgml/ref/revoke.sgml,v 1.37 2006/04/30 02:09:06 momjian Exp $
$PostgreSQL: pgsql/doc/src/sgml/ref/revoke.sgml,v 1.38 2006/04/30 21:15:33 tgl Exp $
PostgreSQL documentation
-->
@ -35,7 +35,7 @@ REVOKE [ GRANT OPTION FOR ]
[ CASCADE | RESTRICT ]
REVOKE [ GRANT OPTION FOR ]
{ { CREATE | TEMPORARY | TEMP | CONNECTION } [,...] | ALL [ PRIVILEGES ] }
{ { CREATE | CONNECT | TEMPORARY | TEMP } [,...] | ALL [ PRIVILEGES ] }
ON DATABASE <replaceable>dbname</replaceable> [, ...]
FROM { <replaceable class="PARAMETER">username</replaceable> | GROUP <replaceable class="PARAMETER">groupname</replaceable> | PUBLIC } [, ...]
[ CASCADE | RESTRICT ]

8
doc/src/sgml/user-manag.sgml
View File

@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/user-manag.sgml,v 1.34 2006/03/10 19:10:49 momjian Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/user-manag.sgml,v 1.35 2006/04/30 21:15:32 tgl Exp $ -->
<chapter id="user-manag">
<title>Database Roles and Privileges</title>
@ -294,9 +294,9 @@ ALTER ROLE myname SET enable_indexscan TO off;
There are several different kinds of privilege: <literal>SELECT</>,
<literal>INSERT</>, <literal>UPDATE</>, <literal>DELETE</>,
<literal>RULE</>, <literal>REFERENCES</>, <literal>TRIGGER</>,
<literal>CREATE</>, <literal>TEMPORARY</>, <literal>EXECUTE</>,
and <literal>USAGE</>. For more
information on the different types of privileges supported by
<literal>CREATE</>, <literal>CONNECT</>, <literal>TEMPORARY</>,
<literal>EXECUTE</>, and <literal>USAGE</>.
For more information on the different types of privileges supported by
<productname>PostgreSQL</productname>, see the
<xref linkend="sql-grant" endterm="sql-grant-title"> reference page.
</para>

42
src/backend/catalog/aclchk.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/catalog/aclchk.c,v 1.126 2006/04/30 02:09:07 momjian Exp $
* $PostgreSQL: pgsql/src/backend/catalog/aclchk.c,v 1.127 2006/04/30 21:15:33 tgl Exp $
*
* NOTES
* See acl.h.
@ -1368,7 +1368,7 @@ string_to_privilege(const char *privname)
return ACL_CREATE_TEMP;
if (strcmp(privname, "temp") == 0)
return ACL_CREATE_TEMP;
if (strcmp(privname, "connection") == 0)
if (strcmp(privname, "connect") == 0)
return ACL_CONNECT;
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
@ -1404,7 +1404,7 @@ privilege_to_string(AclMode privilege)
case ACL_CREATE_TEMP:
return "TEMP";
case ACL_CONNECT:
return "CONNECTION";
return "CONNECT";
default:
elog(ERROR, "unrecognized privilege: %d", (int) privilege);
}
@ -1661,10 +1661,6 @@ pg_database_aclmask(Oid db_oid, Oid roleid,
ScanKeyData entry[1];
SysScanDesc scan;
HeapTuple tuple;
Datum aclDatum;
bool isNull;
Acl *acl;
Oid ownerId;
/* Superusers bypass all permission checking. */
if (superuser_arg(roleid))
@ -1688,10 +1684,33 @@ pg_database_aclmask(Oid db_oid, Oid roleid,
(errcode(ERRCODE_UNDEFINED_DATABASE),
errmsg("database with OID %u does not exist", db_oid)));
ownerId = ((Form_pg_database) GETSTRUCT(tuple))->datdba;
result = pg_database_tuple_aclmask(tuple, RelationGetDescr(pg_database),
roleid, mask, how);
aclDatum = heap_getattr(tuple, Anum_pg_database_datacl,
RelationGetDescr(pg_database), &isNull);
systable_endscan(scan);
heap_close(pg_database, AccessShareLock);
return result;
}
/*
* This is split out so that ReverifyMyDatabase can perform an ACL check
* without a whole extra search of pg_database
*/
AclMode
pg_database_tuple_aclmask(HeapTuple db_tuple, TupleDesc tupdesc,
Oid roleid, AclMode mask, AclMaskHow how)
{
AclMode result;
Datum aclDatum;
bool isNull;
Acl *acl;
Oid ownerId;
ownerId = ((Form_pg_database) GETSTRUCT(db_tuple))->datdba;
aclDatum = heap_getattr(db_tuple, Anum_pg_database_datacl,
tupdesc, &isNull);
if (isNull)
{
@ -1711,9 +1730,6 @@ pg_database_aclmask(Oid db_oid, Oid roleid,
if (acl && (Pointer) acl != DatumGetPointer(aclDatum))
pfree(acl);
systable_endscan(scan);
heap_close(pg_database, AccessShareLock);
return result;
}

12
src/backend/utils/adt/acl.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/adt/acl.c,v 1.132 2006/04/30 02:09:07 momjian Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/acl.c,v 1.133 2006/04/30 21:15:33 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -553,7 +553,8 @@ acldefault(GrantObjectType objtype, Oid ownerId)
owner_default = ACL_ALL_RIGHTS_SEQUENCE;
break;
case ACL_OBJECT_DATABASE:
world_default = ACL_CREATE_TEMP | ACL_CONNECT; /* not NO_RIGHTS! */
/* for backwards compatibility, grant some rights by default */
world_default = ACL_CREATE_TEMP | ACL_CONNECT;
owner_default = ACL_ALL_RIGHTS_DATABASE;
break;
case ACL_OBJECT_FUNCTION:
@ -1341,6 +1342,8 @@ convert_priv_string(text *priv_type_text)
return ACL_CREATE_TEMP;
if (pg_strcasecmp(priv_type, "TEMPORARY") == 0)
return ACL_CREATE_TEMP;
if (pg_strcasecmp(priv_type, "CONNECT") == 0)
return ACL_CONNECT;
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
@ -1778,6 +1781,11 @@ convert_database_priv_string(text *priv_type_text)
if (pg_strcasecmp(priv_type, "TEMP WITH GRANT OPTION") == 0)
return ACL_GRANT_OPTION_FOR(ACL_CREATE_TEMP);
if (pg_strcasecmp(priv_type, "CONNECT") == 0)
return ACL_CONNECT;
if (pg_strcasecmp(priv_type, "CONNECT WITH GRANT OPTION") == 0)
return ACL_GRANT_OPTION_FOR(ACL_CONNECT);
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("unrecognized privilege type: \"%s\"", priv_type)));

74
src/backend/utils/init/postinit.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/init/postinit.c,v 1.163 2006/04/30 02:09:07 momjian Exp $
* $PostgreSQL: pgsql/src/backend/utils/init/postinit.c,v 1.164 2006/04/30 21:15:33 tgl Exp $
*
*
*-------------------------------------------------------------------------
@ -51,7 +51,7 @@
static bool FindMyDatabase(const char *name, Oid *db_id, Oid *db_tablespace);
static void ReverifyMyDatabase(const char *name, const char *user_name);
static void ReverifyMyDatabase(const char *name, bool am_superuser);
static void InitCommunication(void);
static void ShutdownPostgres(int code, Datum arg);
static bool ThereIsAtLeastOneRole(void);
@ -127,12 +127,11 @@ FindMyDatabase(const char *name, Oid *db_id, Oid *db_tablespace)
* of pg_database.
*
* To avoid having to read pg_database more times than necessary
* during session startup, this place is also fitting to set up any
* database-specific configuration variables.
* during session startup, this place is also fitting to check CONNECT
* privilege and set up any database-specific configuration variables.
*/
static void
ReverifyMyDatabase(const char *name, const char *user_name)
ReverifyMyDatabase(const char *name, bool am_superuser)
{
Relation pgdbrel;
SysScanDesc pgdbscan;
@ -195,6 +194,22 @@ ReverifyMyDatabase(const char *name, const char *user_name)
errmsg("database \"%s\" is not currently accepting connections",
name)));
/*
* Check privilege to connect to the database. To avoid making
* a whole extra search of pg_database here, we don't go through
* pg_database_aclcheck, but instead use a lower-level routine
* that we can pass the pg_database tuple to.
*/
if (!am_superuser &&
pg_database_tuple_aclmask(tup, RelationGetDescr(pgdbrel),
GetUserId(),
ACL_CONNECT, ACLMASK_ANY) == 0)
ereport(FATAL,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("permission denied for database %s",
NameStr(dbform->datname)),
errdetail("User does not have CONNECT privilege.")));
/*
* Check connection limit for this database.
*
@ -206,29 +221,12 @@ ReverifyMyDatabase(const char *name, const char *user_name)
* just document that the connection limit is approximate.
*/
if (dbform->datconnlimit >= 0 &&
!superuser() &&
!am_superuser &&
CountDBBackends(MyDatabaseId) > dbform->datconnlimit)
ereport(FATAL,
(errcode(ERRCODE_TOO_MANY_CONNECTIONS),
errmsg("too many connections for database \"%s\"",
name)));
/*
* Checking for privilege to connect to the database
* We want to bypass the test if we are running in bootstrap mode
*/
if (!IsBootstrapProcessingMode())
{
if(pg_database_aclcheck(MyDatabaseId,GetUserId()
,ACL_CONNECT) != ACLCHECK_OK )
{
ereport(FATAL,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("couldn't connect to database %s", NameStr(dbform->datname)),
errdetail("User %s doesn't have the CONNECTION privilege for database %s.",
user_name, NameStr(dbform->datname))));
}
}
}
/*
@ -476,15 +474,20 @@ InitPostgres(const char *dbname, const char *username)
RelationCacheInitializePhase2();
/*
* Figure out our postgres user id. In standalone mode and in the
* autovacuum process, we use a fixed id, otherwise we figure it out from
* the authenticated user name.
* Figure out our postgres user id, and see if we are a superuser.
*
* In standalone mode and in the autovacuum process, we use a fixed id,
* otherwise we figure it out from the authenticated user name.
*/
if (bootstrap || autovacuum)
{
InitializeSessionUserIdStandalone();
am_superuser = true;
}
else if (!IsUnderPostmaster)
{
InitializeSessionUserIdStandalone();
am_superuser = true;
if (!ThereIsAtLeastOneRole())
ereport(WARNING,
(errcode(ERRCODE_UNDEFINED_OBJECT),
@ -496,8 +499,12 @@ InitPostgres(const char *dbname, const char *username)
{
/* normal multiuser case */
InitializeSessionUserId(username);
am_superuser = superuser();
}
/* set up ACL framework (so ReverifyMyDatabase can check permissions) */
initialize_acl();
/*
* Unless we are bootstrapping, double-check that InitMyDatabaseInfo() got
* a correct result. We can't do this until all the database-access
@ -505,7 +512,7 @@ InitPostgres(const char *dbname, const char *username)
* superuser, so the above stuff has to happen first.)
*/
if (!bootstrap)
ReverifyMyDatabase(dbname,username);
ReverifyMyDatabase(dbname, am_superuser);
/*
* Final phase of relation cache startup: write a new cache file if
@ -514,14 +521,6 @@ InitPostgres(const char *dbname, const char *username)
*/
RelationCacheInitializePhase3();
/*
* Check if user is a superuser.
*/
if (bootstrap || autovacuum)
am_superuser = true;
else
am_superuser = superuser();
/*
* Check a normal user hasn't connected to a superuser reserved slot.
*/
@ -540,9 +539,6 @@ InitPostgres(const char *dbname, const char *username)
/* set default namespace search path */
InitializeSearchPath();
/* set up ACL framework (currently just sets RolMemCache callback) */
initialize_acl();
/* initialize client encoding */
InitializeClientEncoding();

3
src/bin/pg_dump/dumputils.c
View File

@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/bin/pg_dump/dumputils.c,v 1.26 2006/03/05 15:58:50 momjian Exp $
* $PostgreSQL: pgsql/src/bin/pg_dump/dumputils.c,v 1.27 2006/04/30 21:15:33 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -605,6 +605,7 @@ do { \
else if (strcmp(type, "DATABASE") == 0)
{
CONVERT_PRIV('C', "CREATE");
CONVERT_PRIV('c', "CONNECT");
CONVERT_PRIV('T', "TEMPORARY");
}
else if (strcmp(type, "TABLESPACE") == 0)

5
src/bin/psql/tab-complete.c
View File

@ -3,7 +3,7 @@
*
* Copyright (c) 2000-2006, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/bin/psql/tab-complete.c,v 1.150 2006/04/02 09:02:41 alvherre Exp $
* $PostgreSQL: pgsql/src/bin/psql/tab-complete.c,v 1.151 2006/04/30 21:15:33 tgl Exp $
*/
/*----------------------------------------------------------------------
@ -1373,7 +1373,8 @@ psql_completion(char *text, int start, int end)
{
static const char *const list_privileg[] =
{"SELECT", "INSERT", "UPDATE", "DELETE", "RULE", "REFERENCES",
"TRIGGER", "CREATE", "TEMPORARY", "EXECUTE", "USAGE", "ALL", NULL};
"TRIGGER", "CREATE", "CONNECT", "TEMPORARY", "EXECUTE", "USAGE",
"ALL", NULL};
COMPLETE_WITH_LIST(list_privileg);
}

8
src/include/utils/acl.h
View File

@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/utils/acl.h,v 1.94 2006/04/30 02:09:07 momjian Exp $
* $PostgreSQL: pgsql/src/include/utils/acl.h,v 1.95 2006/04/30 21:15:33 tgl Exp $
*
* NOTES
* An ACL array is simply an array of AclItems, representing the union
@ -24,6 +24,8 @@
#ifndef ACL_H
#define ACL_H
#include "access/htup.h"
#include "access/tupdesc.h"
#include "nodes/parsenodes.h"
#include "utils/array.h"
@ -145,7 +147,7 @@ typedef ArrayType Acl;
*/
#define ACL_ALL_RIGHTS_RELATION (ACL_INSERT|ACL_SELECT|ACL_UPDATE|ACL_DELETE|ACL_RULE|ACL_REFERENCES|ACL_TRIGGER)
#define ACL_ALL_RIGHTS_SEQUENCE (ACL_USAGE|ACL_SELECT|ACL_UPDATE)
#define ACL_ALL_RIGHTS_DATABASE (ACL_CREATE|ACL_CREATE_TEMP|ACL_CONNECT )
#define ACL_ALL_RIGHTS_DATABASE (ACL_CREATE|ACL_CREATE_TEMP|ACL_CONNECT)
#define ACL_ALL_RIGHTS_FUNCTION (ACL_EXECUTE)
#define ACL_ALL_RIGHTS_LANGUAGE (ACL_USAGE)
#define ACL_ALL_RIGHTS_NAMESPACE (ACL_USAGE|ACL_CREATE)
@ -250,6 +252,8 @@ extern AclMode pg_class_aclmask(Oid table_oid, Oid roleid,
AclMode mask, AclMaskHow how);
extern AclMode pg_database_aclmask(Oid db_oid, Oid roleid,
AclMode mask, AclMaskHow how);
extern AclMode pg_database_tuple_aclmask(HeapTuple db_tuple, TupleDesc tupdesc,
Oid roleid, AclMode mask, AclMaskHow how);
extern AclMode pg_proc_aclmask(Oid proc_oid, Oid roleid,
AclMode mask, AclMaskHow how);
extern AclMode pg_language_aclmask(Oid lang_oid, Oid roleid,