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Reintroduce MAINTAIN privilege and pg_maintain predefined role.

Browse Source 
Roles with MAINTAIN on a relation may run VACUUM, ANALYZE, REINDEX,
REFRESH MATERIALIZE VIEW, CLUSTER, and LOCK TABLE on the relation.
Roles with privileges of pg_maintain may run those same commands on
all relations.

This was previously committed for v16, but it was reverted in
commit 151c22deee due to concerns about search_path tricks that
could be used to escalate privileges to the table owner.  Commits
2af07e2f74, 59825d1639, and c7ea3f4229 resolved these concerns by
restricting search_path when running maintenance commands.

Bumps catversion.

Reviewed-by: Jeff Davis
Discussion: https://postgr.es/m/20240305161235.GA3478007%40nathanxps13
This commit is contained in:
Nathan Bossart
2024-03-13 14:49:26 -05:00
parent 2041bc4276
commit ecb0fd3372
42 changed files with 457 additions and 180 deletions
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8
src/backend/utils/adt/acl.c
View File

@@ -330,6 +330,9 @@ aclparse(const char *s, AclItem *aip, Node *escontext)
case ACL_ALTER_SYSTEM_CHR:
read = ACL_ALTER_SYSTEM;
break;
case ACL_MAINTAIN_CHR:
read = ACL_MAINTAIN;
break;
case 'R': /* ignore old RULE privileges */
read = 0;
break;
@@ -1621,6 +1624,7 @@ makeaclitem(PG_FUNCTION_ARGS)
{"CONNECT", ACL_CONNECT},
{"SET", ACL_SET},
{"ALTER SYSTEM", ACL_ALTER_SYSTEM},
{"MAINTAIN", ACL_MAINTAIN},
{"RULE", 0}, /* ignore old RULE privileges */
{NULL, 0}
};
@@ -1729,6 +1733,8 @@ convert_aclright_to_string(int aclright)
return "SET";
case ACL_ALTER_SYSTEM:
return "ALTER SYSTEM";
case ACL_MAINTAIN:
return "MAINTAIN";
default:
elog(ERROR, "unrecognized aclright: %d", aclright);
return NULL;
@@ -2041,6 +2047,8 @@ convert_table_priv_string(text *priv_type_text)
{"REFERENCES WITH GRANT OPTION", ACL_GRANT_OPTION_FOR(ACL_REFERENCES)},
{"TRIGGER", ACL_TRIGGER},
{"TRIGGER WITH GRANT OPTION", ACL_GRANT_OPTION_FOR(ACL_TRIGGER)},
{"MAINTAIN", ACL_MAINTAIN},
{"MAINTAIN WITH GRANT OPTION", ACL_GRANT_OPTION_FOR(ACL_MAINTAIN)},
{"RULE", 0}, /* ignore old RULE privileges */
{"RULE WITH GRANT OPTION", 0},
{NULL, 0}