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Add grantable MAINTAIN privilege and pg_maintain role.

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Allows VACUUM, ANALYZE, REINDEX, REFRESH MATERIALIZED VIEW, CLUSTER,
and LOCK TABLE.

Effectively reverts 4441fc704d. Instead of creating separate
privileges for VACUUM, ANALYZE, and other maintenance commands, group
them together under a single MAINTAIN privilege.

Author: Nathan Bossart
Discussion: https://postgr.es/m/20221212210136.GA449764@nathanxps13
Discussion: https://postgr.es/m/45224.1670476523@sss.pgh.pa.us
This commit is contained in:
Jeff Davis
2022-12-13 17:33:28 -08:00
parent c6f6646bb0
commit 60684dd834
36 changed files with 338 additions and 352 deletions
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36
src/backend/commands/indexcmds.c
View File

@ -26,6 +26,7 @@
#include "catalog/index.h"
#include "catalog/indexing.h"
#include "catalog/pg_am.h"
#include "catalog/pg_authid.h"
#include "catalog/pg_constraint.h"
#include "catalog/pg_database.h"
#include "catalog/pg_inherits.h"
@ -2754,6 +2755,7 @@ RangeVarCallbackForReindexIndex(const RangeVar *relation,
char relkind;
struct ReindexIndexCallbackState *state = arg;
LOCKMODE table_lockmode;
Oid table_oid;
/*
* Lock level here should match table lock in reindex_index() for
@ -2793,14 +2795,16 @@ RangeVarCallbackForReindexIndex(const RangeVar *relation,
errmsg("\"%s\" is not an index", relation->relname)));
/* Check permissions */
if (!object_ownercheck(RelationRelationId, relId, GetUserId()))
aclcheck_error(ACLCHECK_NOT_OWNER, OBJECT_INDEX, relation->relname);
table_oid = IndexGetRelation(relId, true);
if (!object_ownercheck(RelationRelationId, relId, GetUserId()) &&
OidIsValid(table_oid) &&
pg_class_aclcheck(table_oid, GetUserId(), ACL_MAINTAIN) != ACLCHECK_OK)
aclcheck_error(ACLCHECK_NOT_OWNER, OBJECT_INDEX,
relation->relname);
/* Lock heap before index to avoid deadlock. */
if (relId != oldRelId)
{
Oid table_oid = IndexGetRelation(relId, true);
/*
* If the OID isn't valid, it means the index was concurrently
* dropped, which is not a problem for us; just return normally.
@ -2835,7 +2839,7 @@ ReindexTable(RangeVar *relation, ReindexParams *params, bool isTopLevel)
(params->options & REINDEXOPT_CONCURRENTLY) != 0 ?
ShareUpdateExclusiveLock : ShareLock,
0,
RangeVarCallbackOwnsTable, NULL);
RangeVarCallbackMaintainsTable, NULL);
if (get_rel_relkind(heapOid) == RELKIND_PARTITIONED_TABLE)
ReindexPartitions(heapOid, params, isTopLevel);
@ -2917,7 +2921,8 @@ ReindexMultipleTables(const char *objectName, ReindexObjectType objectKind,
{
objectOid = get_namespace_oid(objectName, false);
if (!object_ownercheck(NamespaceRelationId, objectOid, GetUserId()))
if (!object_ownercheck(NamespaceRelationId, objectOid, GetUserId()) &&
!has_privs_of_role(GetUserId(), ROLE_PG_MAINTAIN))
aclcheck_error(ACLCHECK_NOT_OWNER, OBJECT_SCHEMA,
objectName);
}
@ -2929,7 +2934,8 @@ ReindexMultipleTables(const char *objectName, ReindexObjectType objectKind,
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("can only reindex the currently open database")));
if (!object_ownercheck(DatabaseRelationId, objectOid, GetUserId()))
if (!object_ownercheck(DatabaseRelationId, objectOid, GetUserId()) &&
!has_privs_of_role(GetUserId(), ROLE_PG_MAINTAIN))
aclcheck_error(ACLCHECK_NOT_OWNER, OBJECT_DATABASE,
get_database_name(objectOid));
}
@ -3001,15 +3007,17 @@ ReindexMultipleTables(const char *objectName, ReindexObjectType objectKind,
continue;
/*
* The table can be reindexed if the user is superuser, the table
* owner, or the database/schema owner (but in the latter case, only
* if it's not a shared relation). object_ownercheck includes the
* superuser case, and depending on objectKind we already know that
* the user has permission to run REINDEX on this database or schema
* per the permission checks at the beginning of this routine.
* The table can be reindexed if the user has been granted MAINTAIN on
* the table or the user is a superuser, the table owner, or the
* database/schema owner (but in the latter case, only if it's not a
* shared relation). object_ownercheck includes the superuser case,
* and depending on objectKind we already know that the user has
* permission to run REINDEX on this database or schema per the
* permission checks at the beginning of this routine.
*/
if (classtuple->relisshared &&
!object_ownercheck(RelationRelationId, relid, GetUserId()))
!object_ownercheck(RelationRelationId, relid, GetUserId()) &&
pg_class_aclcheck(relid, GetUserId(), ACL_MAINTAIN) != ACLCHECK_OK)
continue;
/*