greenplumn user 源码
greenplumn user 代码
文件路径：/src/backend/commands/user.c
/*-------------------------------------------------------------------------
*
* user.c
* Commands for manipulating roles (formerly called users).
*
* Portions Copyright (c) 2005-2010, Greenplum inc
* Portions Copyright (c) 2012-Present VMware, Inc. or its affiliates.
* Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/backend/commands/user.c
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "access/genam.h"
#include "access/htup_details.h"
#include "access/table.h"
#include "access/xact.h"
#include "catalog/binary_upgrade.h"
#include "catalog/catalog.h"
#include "catalog/dependency.h"
#include "catalog/heap.h"
#include "catalog/indexing.h"
#include "catalog/objectaccess.h"
#include "catalog/pg_auth_members.h"
#include "catalog/pg_authid.h"
#include "catalog/pg_database.h"
#include "catalog/pg_db_role_setting.h"
#include "commands/comment.h"
#include "commands/dbcommands.h"
#include "commands/seclabel.h"
#include "commands/user.h"
#include "libpq/crypt.h"
#include "miscadmin.h"
#include "storage/lmgr.h"
#include "utils/acl.h"
#include "utils/builtins.h"
#include "utils/date.h"
#include "utils/fmgroids.h"
#include "utils/syscache.h"
#include "utils/timestamp.h"
#include "catalog/oid_dispatch.h"
#include "catalog/pg_auth_time_constraint.h"
#include "catalog/pg_resgroup.h"
#include "catalog/pg_resqueue.h"
#include "commands/resgroupcmds.h"
#include "executor/execdesc.h"
#include "libpq/auth.h"
#include "utils/resource_manager.h"
#include "cdb/cdbdisp_query.h"
#include "cdb/cdbvars.h"
typedef struct extAuthPair
{
char *protocol;
char *type;
} extAuthPair;
/* GUC parameter */
int Password_encryption = PASSWORD_TYPE_MD5;
/* Hook to check passwords in CreateRole() and AlterRole() */
check_password_hook_type check_password_hook = NULL;
static void AddRoleMems(const char *rolename, Oid roleid,
List *memberSpecs, List *memberIds,
Oid grantorId, bool admin_opt);
static void DelRoleMems(const char *rolename, Oid roleid,
List *memberSpecs, List *memberIds,
bool admin_opt);
static extAuthPair *TransformExttabAuthClause(DefElem *defel);
static void SetCreateExtTableForRole(List* allow,
List* disallow, bool* createrextgpfd,
bool* createrexthttp, bool* createwextgpfd);
static char *daysofweek[] = {"Sunday", "Monday", "Tuesday", "Wednesday",
"Thursday", "Friday", "Saturday"};
static int16 ExtractAuthInterpretDay(Value * day);
static void ExtractAuthIntervalClause(DefElem *defel,
authInterval *authInterval);
static void AddRoleDenials(const char *rolename, Oid roleid,
List *addintervals);
static void DelRoleDenials(const char *rolename, Oid roleid,
List *dropintervals);
/* Check if current user has createrole privileges */
static bool
have_createrole_privilege(void)
{
return has_createrole_privilege(GetUserId());
}
/*
* CREATE ROLE
*/
Oid
CreateRole(ParseState *pstate, CreateRoleStmt *stmt)
{
Relation pg_authid_rel;
TupleDesc pg_authid_dsc;
HeapTuple tuple;
Datum new_record[Natts_pg_authid];
bool new_record_nulls[Natts_pg_authid];
Oid roleid;
ListCell *item;
ListCell *option;
char *password = NULL; /* user password */
bool issuper = false; /* Make the user a superuser? */
bool inherit = true; /* Auto inherit privileges? */
bool createrole = false; /* Can this user create roles? */
bool createdb = false; /* Can the user create databases? */
bool canlogin = false; /* Can this user login? */
bool isreplication = false; /* Is this a replication role? */
bool createrextgpfd = false; /* Can create readable gpfdist exttab? */
bool createrexthttp = false; /* Can create readable http exttab? */
bool createwextgpfd = false; /* Can create writable gpfdist exttab? */
List *exttabcreate = NIL; /* external table create privileges being added */
List *exttabnocreate = NIL; /* external table create privileges being removed */
bool bypassrls = false; /* Is this a row security enabled role? */
int connlimit = -1; /* maximum connections allowed */
List *addroleto = NIL; /* roles to make this a member of */
List *rolemembers = NIL; /* roles to be members of this role */
List *adminmembers = NIL; /* roles to be admins of this role */
char *validUntil = NULL; /* time the login is valid until */
Datum validUntil_datum; /* same, as timestamptz Datum */
bool validUntil_null;
char *resqueue = NULL; /* resource queue for this role */
char *resgroup = NULL; /* resource group for this role */
List *addintervals = NIL; /* list of time intervals for which login should be denied */
DefElem *dpassword = NULL;
DefElem *dresqueue = NULL;
DefElem *dresgroup = NULL;
DefElem *dissuper = NULL;
DefElem *dinherit = NULL;
DefElem *dcreaterole = NULL;
DefElem *dcreatedb = NULL;
DefElem *dcanlogin = NULL;
DefElem *disreplication = NULL;
DefElem *dconnlimit = NULL;
DefElem *daddroleto = NULL;
DefElem *drolemembers = NULL;
DefElem *dadminmembers = NULL;
DefElem *dvalidUntil = NULL;
DefElem *dbypassRLS = NULL;
/* The defaults can vary depending on the original statement type */
switch (stmt->stmt_type)
{
case ROLESTMT_ROLE:
break;
case ROLESTMT_USER:
canlogin = true;
/* may eventually want inherit to default to false here */
break;
case ROLESTMT_GROUP:
break;
}
/* Extract options from the statement node tree */
foreach(option, stmt->options)
{
DefElem *defel = (DefElem *) lfirst(option);
if (strcmp(defel->defname, "password") == 0)
{
if (dpassword)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options"),
parser_errposition(pstate, defel->location)));
dpassword = defel;
}
else if (strcmp(defel->defname, "sysid") == 0)
{
if (Gp_role != GP_ROLE_EXECUTE)
ereport(NOTICE,
(errmsg("SYSID can no longer be specified")));
}
else if (strcmp(defel->defname, "superuser") == 0)
{
if (dissuper)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options"),
parser_errposition(pstate, defel->location)));
dissuper = defel;
}
else if (strcmp(defel->defname, "inherit") == 0)
{
if (dinherit)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options"),
parser_errposition(pstate, defel->location)));
dinherit = defel;
}
else if (strcmp(defel->defname, "createrole") == 0)
{
if (dcreaterole)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options"),
parser_errposition(pstate, defel->location)));
dcreaterole = defel;
}
else if (strcmp(defel->defname, "createdb") == 0)
{
if (dcreatedb)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options"),
parser_errposition(pstate, defel->location)));
dcreatedb = defel;
}
else if (strcmp(defel->defname, "canlogin") == 0)
{
if (dcanlogin)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options"),
parser_errposition(pstate, defel->location)));
dcanlogin = defel;
}
else if (strcmp(defel->defname, "isreplication") == 0)
{
if (disreplication)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options"),
parser_errposition(pstate, defel->location)));
disreplication = defel;
}
else if (strcmp(defel->defname, "connectionlimit") == 0)
{
if (dconnlimit)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options"),
parser_errposition(pstate, defel->location)));
dconnlimit = defel;
}
else if (strcmp(defel->defname, "addroleto") == 0)
{
if (daddroleto)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options"),
parser_errposition(pstate, defel->location)));
daddroleto = defel;
}
else if (strcmp(defel->defname, "rolemembers") == 0)
{
if (drolemembers)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options"),
parser_errposition(pstate, defel->location)));
drolemembers = defel;
}
else if (strcmp(defel->defname, "adminmembers") == 0)
{
if (dadminmembers)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options"),
parser_errposition(pstate, defel->location)));
dadminmembers = defel;
}
else if (strcmp(defel->defname, "validUntil") == 0)
{
if (dvalidUntil)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options"),
parser_errposition(pstate, defel->location)));
dvalidUntil = defel;
}
else if (strcmp(defel->defname, "resourceQueue") == 0)
{
if (dresqueue)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options")));
dresqueue = defel;
}
else if (strcmp(defel->defname, "resourceGroup") == 0)
{
if (dresgroup)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options")));
dresgroup = defel;
}
else if (strcmp(defel->defname, "exttabauth") == 0)
{
extAuthPair *extauth;
extauth = TransformExttabAuthClause(defel);
/* now actually append our transformed key value pairs to the list */
exttabcreate = lappend(exttabcreate, extauth);
}
else if (strcmp(defel->defname, "exttabnoauth") == 0)
{
extAuthPair *extauth;
extauth = TransformExttabAuthClause(defel);
/* now actually append our transformed key value pairs to the list */
exttabnocreate = lappend(exttabnocreate, extauth);
}
else if (strcmp(defel->defname, "deny") == 0)
{
authInterval *interval = (authInterval *) palloc0(sizeof(authInterval));
ExtractAuthIntervalClause(defel, interval);
addintervals = lappend(addintervals, interval);
}
else if (strcmp(defel->defname, "bypassrls") == 0)
{
if (dbypassRLS)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options"),
parser_errposition(pstate, defel->location)));
dbypassRLS = defel;
}
else
elog(ERROR, "option \"%s\" not recognized",
defel->defname);
}
if (dpassword && dpassword->arg)
password = strVal(dpassword->arg);
if (dissuper)
issuper = intVal(dissuper->arg) != 0;
if (dinherit)
inherit = intVal(dinherit->arg) != 0;
if (dcreaterole)
createrole = intVal(dcreaterole->arg) != 0;
if (dcreatedb)
createdb = intVal(dcreatedb->arg) != 0;
if (dcanlogin)
canlogin = intVal(dcanlogin->arg) != 0;
if (disreplication)
isreplication = intVal(disreplication->arg) != 0;
if (dconnlimit)
{
connlimit = intVal(dconnlimit->arg);
if (connlimit < -1)
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("invalid connection limit: %d", connlimit)));
}
if (daddroleto)
addroleto = (List *) daddroleto->arg;
if (drolemembers)
rolemembers = (List *) drolemembers->arg;
if (dadminmembers)
adminmembers = (List *) dadminmembers->arg;
if (dvalidUntil)
validUntil = strVal(dvalidUntil->arg);
if (dresqueue)
resqueue = strVal(linitial((List *) dresqueue->arg));
if (dresgroup)
resgroup = strVal(linitial((List *) dresgroup->arg));
if (dbypassRLS)
bypassrls = intVal(dbypassRLS->arg) != 0;
/* Check some permissions first */
if (issuper)
{
if (!superuser())
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("must be superuser to create superusers")));
}
else if (isreplication)
{
if (!superuser())
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("must be superuser to create replication users")));
}
else if (bypassrls)
{
if (!superuser())
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("must be superuser to change bypassrls attribute")));
}
else
{
if (!have_createrole_privilege())
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("permission denied to create role")));
}
/*
* Check that the user is not trying to create a role in the reserved
* "pg_" namespace.
*/
if (IsReservedName(stmt->role))
ereport(ERROR,
(errcode(ERRCODE_RESERVED_NAME),
errmsg("role name \"%s\" is reserved",
stmt->role),
errdetail("Role names starting with \"pg_\" are reserved.")));
/*
* If built with appropriate switch, whine when regression-testing
* conventions for role names are violated.
*/
#ifdef ENFORCE_REGRESSION_TEST_NAME_RESTRICTIONS
if (strncmp(stmt->role, "regress_", 8) != 0)
elog(WARNING, "roles created by regression test cases should have names starting with \"regress_\"");
#endif
/*
* Check the pg_authid relation to be certain the role doesn't already
* exist.
*/
pg_authid_rel = table_open(AuthIdRelationId, RowExclusiveLock);
pg_authid_dsc = RelationGetDescr(pg_authid_rel);
if (OidIsValid(get_role_oid(stmt->role, true)))
ereport(ERROR,
(errcode(ERRCODE_DUPLICATE_OBJECT),
errmsg("role \"%s\" already exists",
stmt->role)));
/* Convert validuntil to internal form */
if (validUntil)
{
validUntil_datum = DirectFunctionCall3(timestamptz_in,
CStringGetDatum(validUntil),
ObjectIdGetDatum(InvalidOid),
Int32GetDatum(-1));
validUntil_null = false;
}
else
{
validUntil_datum = (Datum) 0;
validUntil_null = true;
}
/*
* Call the password checking hook if there is one defined
*/
if (check_password_hook && password)
(*check_password_hook) (stmt->role,
password,
get_password_type(password),
validUntil_datum,
validUntil_null);
/*
* Build a tuple to insert
*/
MemSet(new_record, 0, sizeof(new_record));
MemSet(new_record_nulls, false, sizeof(new_record_nulls));
new_record[Anum_pg_authid_rolname - 1] =
DirectFunctionCall1(namein, CStringGetDatum(stmt->role));
new_record[Anum_pg_authid_rolsuper - 1] = BoolGetDatum(issuper);
new_record[Anum_pg_authid_rolinherit - 1] = BoolGetDatum(inherit);
new_record[Anum_pg_authid_rolcreaterole - 1] = BoolGetDatum(createrole);
new_record[Anum_pg_authid_rolcreatedb - 1] = BoolGetDatum(createdb);
new_record[Anum_pg_authid_rolcanlogin - 1] = BoolGetDatum(canlogin);
new_record[Anum_pg_authid_rolreplication - 1] = BoolGetDatum(isreplication);
new_record[Anum_pg_authid_rolconnlimit - 1] = Int32GetDatum(connlimit);
/* Set the CREATE EXTERNAL TABLE permissions for this role */
if (exttabcreate || exttabnocreate)
SetCreateExtTableForRole(exttabcreate, exttabnocreate, &createrextgpfd,
&createrexthttp, &createwextgpfd);
new_record[Anum_pg_authid_rolcreaterextgpfd - 1] = BoolGetDatum(createrextgpfd);
new_record[Anum_pg_authid_rolcreaterexthttp - 1] = BoolGetDatum(createrexthttp);
new_record[Anum_pg_authid_rolcreatewextgpfd - 1] = BoolGetDatum(createwextgpfd);
if (password)
{
char *shadow_pass;
char *logdetail;
/*
* Don't allow an empty password. Libpq treats an empty password the
* same as no password at all, and won't even try to authenticate. But
* other clients might, so allowing it would be confusing. By clearing
* the password when an empty string is specified, the account is
* consistently locked for all clients.
*
* Note that this only covers passwords stored in the database itself.
* There are also checks in the authentication code, to forbid an
* empty password from being used with authentication methods that
* fetch the password from an external system, like LDAP or PAM.
*/
if (password[0] == '\0' ||
plain_crypt_verify(stmt->role, password, "", &logdetail) == STATUS_OK)
{
ereport(NOTICE,
(errmsg("empty string is not a valid password, clearing password")));
new_record_nulls[Anum_pg_authid_rolpassword - 1] = true;
}
else
{
/* Encrypt the password to the requested format. */
shadow_pass = encrypt_password(Password_encryption, stmt->role,
password);
new_record[Anum_pg_authid_rolpassword - 1] =
CStringGetTextDatum(shadow_pass);
}
}
else
new_record_nulls[Anum_pg_authid_rolpassword - 1] = true;
new_record[Anum_pg_authid_rolvaliduntil - 1] = validUntil_datum;
new_record_nulls[Anum_pg_authid_rolvaliduntil - 1] = validUntil_null;
if (resqueue)
{
Oid queueid;
if (strcmp(resqueue, "none") == 0)
ereport(ERROR,
(errcode(ERRCODE_RESERVED_NAME),
errmsg("resource queue name \"%s\" is reserved",
resqueue)));
queueid = GetResQueueIdForName(resqueue);
if (queueid == InvalidOid)
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_OBJECT),
errmsg("resource queue \"%s\" does not exist",
resqueue)));
new_record[Anum_pg_authid_rolresqueue - 1] =
ObjectIdGetDatum(queueid);
/*
* Don't complain if you CREATE a superuser,
* who doesn't use the queue
*/
if (!IsResQueueEnabled() && !issuper)
ereport(WARNING,
(errmsg("resource queue is disabled"),
errhint("To enable set gp_resource_manager=queue")));
}
else
{
/*
* Resource queue required -- use default queue
* Don't complain if you CREATE a superuser, who doesn't use the queue
*/
new_record[Anum_pg_authid_rolresqueue - 1] = ObjectIdGetDatum(DEFAULTRESQUEUE_OID);
if (IsResQueueEnabled() && Gp_role == GP_ROLE_DISPATCH && !issuper)
ereport(NOTICE,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("resource queue required -- using default resource queue \"%s\"",
GP_DEFAULT_RESOURCE_QUEUE_NAME)));
}
if (resgroup)
{
Oid rsgid;
rsgid = get_resgroup_oid(resgroup, false);
if (rsgid == ADMINRESGROUP_OID && !issuper)
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("only superuser can be assigned to admin resgroup")));
ResGroupCheckForRole(rsgid);
new_record[Anum_pg_authid_rolresgroup - 1] = ObjectIdGetDatum(rsgid);
if (!IsResGroupActivated() && Gp_role == GP_ROLE_DISPATCH)
ereport(WARNING,
(errmsg("resource group is disabled"),
errhint("To enable set gp_resource_manager=group")));
}
else if (issuper)
{
if (IsResGroupActivated() && Gp_role == GP_ROLE_DISPATCH)
{
ereport(NOTICE,
(errmsg("resource group required -- using admin resource group \"admin_group\"")));
}
new_record[Anum_pg_authid_rolresgroup - 1] = ObjectIdGetDatum(ADMINRESGROUP_OID);
}
else
{
if (IsResGroupActivated() && Gp_role == GP_ROLE_DISPATCH)
{
ereport(NOTICE,
(errmsg("resource group required -- using default resource group \"default_group\"")));
}
new_record[Anum_pg_authid_rolresgroup - 1] = ObjectIdGetDatum(DEFAULTRESGROUP_OID);
}
new_record_nulls[Anum_pg_authid_rolresgroup - 1] = false;
new_record[Anum_pg_authid_rolbypassrls - 1] = BoolGetDatum(bypassrls);
/*
* pg_largeobject_metadata contains pg_authid.oid's, so we use the
* binary-upgrade override.
*
* GetNewOidForAuthId() / GetNewOrPreassignedOid() will return the
* pre-assigned OID, if any, and error out if there was no pre-assigned
* values in binary upgrade mode.
*/
{
roleid = GetNewOidForAuthId(pg_authid_rel, AuthIdOidIndexId,
Anum_pg_authid_oid,
stmt->role);
}
new_record[Anum_pg_authid_oid - 1] = ObjectIdGetDatum(roleid);
tuple = heap_form_tuple(pg_authid_dsc, new_record, new_record_nulls);
/*
* Insert new record in the pg_authid table
*/
CatalogTupleInsert(pg_authid_rel, tuple);
/*
* Advance command counter so we can see new record; else tests in
* AddRoleMems may fail.
*/
if (addroleto || adminmembers || rolemembers)
CommandCounterIncrement();
/*
* Add the new role to the specified existing roles.
*/
foreach(item, addroleto)
{
RoleSpec *oldrole = lfirst(item);
HeapTuple oldroletup = get_rolespec_tuple(oldrole);
Form_pg_authid oldroleform = (Form_pg_authid) GETSTRUCT(oldroletup);
Oid oldroleid = oldroleform->oid;
char *oldrolename = NameStr(oldroleform->rolname);
AddRoleMems(oldrolename, oldroleid,
list_make1(makeString(stmt->role)),
list_make1_oid(roleid),
GetUserId(), false);
ReleaseSysCache(oldroletup);
}
/*
* Add the specified members to this new role. adminmembers get the admin
* option, rolemembers don't.
*/
AddRoleMems(stmt->role, roleid,
adminmembers, roleSpecsToIds(adminmembers),
GetUserId(), true);
AddRoleMems(stmt->role, roleid,
rolemembers, roleSpecsToIds(rolemembers),
GetUserId(), false);
/* Post creation hook for new role */
InvokeObjectPostCreateHook(AuthIdRelationId, roleid, 0);
/*
* Populate pg_auth_time_constraint with intervals for which this
* particular role should be denied access.
*/
if (addintervals)
{
if (issuper)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("cannot create superuser with DENY rules")));
AddRoleDenials(stmt->role, roleid, addintervals);
}
/*
* Close pg_authid, but keep lock till commit.
*/
table_close(pg_authid_rel, NoLock);
if (Gp_role == GP_ROLE_DISPATCH)
{
Assert(stmt->type == T_CreateRoleStmt);
Assert(stmt->type < 1000);
CdbDispatchUtilityStatement((Node *) stmt,
DF_CANCEL_ON_ERROR|
DF_WITH_SNAPSHOT|
DF_NEED_TWO_PHASE,
GetAssignedOidsForDispatch(),
NULL);
/* MPP-6929: metadata tracking */
MetaTrackAddObject(AuthIdRelationId,
roleid,
GetUserId(),
"CREATE", "ROLE");
}
return roleid;
}
/*
* ALTER ROLE
*
* Note: the rolemembers option accepted here is intended to support the
* backwards-compatible ALTER GROUP syntax. Although it will work to say
* "ALTER ROLE role ROLE rolenames", we don't document it.
*/
Oid
AlterRole(AlterRoleStmt *stmt)
{
Datum new_record[Natts_pg_authid];
bool new_record_nulls[Natts_pg_authid];
bool new_record_repl[Natts_pg_authid];
Relation pg_authid_rel;
TupleDesc pg_authid_dsc;
HeapTuple tuple,
new_tuple;
Form_pg_authid authform;
ListCell *option;
char *rolename = NULL;
char *password = NULL; /* user password */
int issuper = -1; /* Make the user a superuser? */
int inherit = -1; /* Auto inherit privileges? */
int createrole = -1; /* Can this user create roles? */
int createdb = -1; /* Can the user create databases? */
int canlogin = -1; /* Can this user login? */
int isreplication = -1; /* Is this a replication role? */
int connlimit = -1; /* maximum connections allowed */
char *resqueue = NULL; /* resource queue for this role */
char *resgroup = NULL; /* resource group for this role */
List *exttabcreate = NIL; /* external table create privileges being added */
List *exttabnocreate = NIL; /* external table create privileges being removed */
List *rolemembers = NIL; /* roles to be added/removed */
char *validUntil = NULL; /* time the login is valid until */
Datum validUntil_datum; /* same, as timestamptz Datum */
bool validUntil_null;
int bypassrls = -1;
DefElem *dpassword = NULL;
DefElem *dresqueue = NULL;
DefElem *dresgroup = NULL;
DefElem *dissuper = NULL;
DefElem *dinherit = NULL;
DefElem *dcreaterole = NULL;
DefElem *dcreatedb = NULL;
DefElem *dcanlogin = NULL;
DefElem *disreplication = NULL;
DefElem *dconnlimit = NULL;
DefElem *drolemembers = NULL;
DefElem *dvalidUntil = NULL;
DefElem *dbypassRLS = NULL;
Oid roleid;
bool bWas_super = false; /* Was the user a superuser? */
int numopts = 0;
char *alter_subtype = ""; /* metadata tracking: kind of
redundant to say "role" */
bool createrextgpfd;
bool createrexthttp;
bool createwextgpfd;
List *addintervals = NIL; /* list of time intervals for which login should be denied */
List *dropintervals = NIL; /* list of time intervals for which matching rules should be dropped */
Oid queueid;
numopts = list_length(stmt->options);
if (numopts > 1)
{
char allopts[NAMEDATALEN];
sprintf(allopts, "%d OPTIONS", numopts);
alter_subtype = pstrdup(allopts);
}
else if (0 == numopts)
{
alter_subtype = "0 OPTIONS";
}
check_rolespec_name(stmt->role,
"Cannot alter reserved roles.");
/* Extract options from the statement node tree */
foreach(option, stmt->options)
{
DefElem *defel = (DefElem *) lfirst(option);
if (strcmp(defel->defname, "password") == 0)
{
if (dpassword)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options")));
dpassword = defel;
}
else if (strcmp(defel->defname, "superuser") == 0)
{
if (dissuper)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options")));
dissuper = defel;
if (1 == numopts) alter_subtype = "SUPERUSER";
}
else if (strcmp(defel->defname, "inherit") == 0)
{
if (dinherit)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options")));
dinherit = defel;
if (1 == numopts) alter_subtype = "INHERIT";
}
else if (strcmp(defel->defname, "createrole") == 0)
{
if (dcreaterole)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options")));
dcreaterole = defel;
if (1 == numopts) alter_subtype = "CREATEROLE";
}
else if (strcmp(defel->defname, "createdb") == 0)
{
if (dcreatedb)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options")));
dcreatedb = defel;
if (1 == numopts) alter_subtype = "CREATEDB";
}
else if (strcmp(defel->defname, "canlogin") == 0)
{
if (dcanlogin)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options")));
dcanlogin = defel;
if (1 == numopts) alter_subtype = "LOGIN";
}
else if (strcmp(defel->defname, "isreplication") == 0)
{
if (disreplication)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options")));
disreplication = defel;
}
else if (strcmp(defel->defname, "connectionlimit") == 0)
{
if (dconnlimit)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options")));
dconnlimit = defel;
if (1 == numopts) alter_subtype = "CONNECTION LIMIT";
}
else if (strcmp(defel->defname, "rolemembers") == 0 &&
stmt->action != 0)
{
if (drolemembers)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options")));
drolemembers = defel;
if (1 == numopts) alter_subtype = "ROLE";
}
else if (strcmp(defel->defname, "validUntil") == 0)
{
if (dvalidUntil)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options")));
dvalidUntil = defel;
if (1 == numopts) alter_subtype = "VALID UNTIL";
}
else if (strcmp(defel->defname, "resourceQueue") == 0)
{
if (dresqueue)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options")));
dresqueue = defel;
if (1 == numopts) alter_subtype = "RESOURCE QUEUE";
}
else if (strcmp(defel->defname, "resourceGroup") == 0)
{
if (dresgroup)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options")));
dresgroup = defel;
if (1 == numopts)
alter_subtype = "RESOURCE GROUP";
}
else if (strcmp(defel->defname, "exttabauth") == 0)
{
extAuthPair *extauth;
extauth = TransformExttabAuthClause(defel);
/* now actually append our transformed key value pairs to the list */
exttabcreate = lappend(exttabcreate, extauth);
if (1 == numopts) alter_subtype = "CREATEEXTTABLE";
}
else if (strcmp(defel->defname, "exttabnoauth") == 0)
{
extAuthPair *extauth;
extauth = TransformExttabAuthClause(defel);
/* now actually append our transformed key value pairs to the list */
exttabnocreate = lappend(exttabnocreate, extauth);
if (1 == numopts) alter_subtype = "NO CREATEEXTTABLE";
}
else if (strcmp(defel->defname, "deny") == 0)
{
authInterval *interval = (authInterval *) palloc0(sizeof(authInterval));
ExtractAuthIntervalClause(defel, interval);
addintervals = lappend(addintervals, interval);
}
else if (strcmp(defel->defname, "drop_deny") == 0)
{
authInterval *interval = (authInterval *) palloc0(sizeof(authInterval));
ExtractAuthIntervalClause(defel, interval);
dropintervals = lappend(dropintervals, interval);
}
else if (strcmp(defel->defname, "bypassrls") == 0)
{
if (dbypassRLS)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options")));
dbypassRLS = defel;
}
else
elog(ERROR, "option \"%s\" not recognized",
defel->defname);
}
if (dpassword && dpassword->arg)
password = strVal(dpassword->arg);
if (dissuper)
issuper = intVal(dissuper->arg);
if (dinherit)
inherit = intVal(dinherit->arg);
if (dcreaterole)
createrole = intVal(dcreaterole->arg);
if (dcreatedb)
createdb = intVal(dcreatedb->arg);
if (dcanlogin)
canlogin = intVal(dcanlogin->arg);
if (disreplication)
isreplication = intVal(disreplication->arg);
if (dconnlimit)
{
connlimit = intVal(dconnlimit->arg);
if (connlimit < -1)
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("invalid connection limit: %d", connlimit)));
}
if (drolemembers)
rolemembers = (List *) drolemembers->arg;
if (dvalidUntil)
validUntil = strVal(dvalidUntil->arg);
if (dresqueue)
resqueue = strVal(linitial((List *) dresqueue->arg));
if (dresgroup)
resgroup = strVal(linitial((List *) dresgroup->arg));
if (dbypassRLS)
bypassrls = intVal(dbypassRLS->arg);
/*
* Scan the pg_authid relation to be certain the user exists.
*/
pg_authid_rel = table_open(AuthIdRelationId, RowExclusiveLock);
pg_authid_dsc = RelationGetDescr(pg_authid_rel);
tuple = get_rolespec_tuple(stmt->role);
authform = (Form_pg_authid) GETSTRUCT(tuple);
rolename = pstrdup(NameStr(authform->rolname));
roleid = authform->oid;
/*
* To mess with a superuser you gotta be superuser; else you need
* createrole, or just want to change your own password
*/
bWas_super = ((Form_pg_authid) GETSTRUCT(tuple))->rolsuper;
if (authform->rolsuper || issuper >= 0)
{
if (!superuser())
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("must be superuser to alter superusers")));
}
else if (authform->rolreplication || isreplication >= 0)
{
if (!superuser())
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("must be superuser to alter replication users")));
}
else if (authform->rolbypassrls || bypassrls >= 0)
{
if (!superuser())
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("must be superuser to change bypassrls attribute")));
}
else if (!have_createrole_privilege())
{
if (!(inherit < 0 &&
createrole < 0 &&
createdb < 0 &&
canlogin < 0 &&
isreplication < 0 &&
!dconnlimit &&
!rolemembers &&
!validUntil &&
dpassword &&
!exttabcreate &&
!exttabnocreate &&
roleid == GetUserId()))
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("permission denied")));
}
/* Convert validuntil to internal form */
if (validUntil)
{
validUntil_datum = DirectFunctionCall3(timestamptz_in,
CStringGetDatum(validUntil),
ObjectIdGetDatum(InvalidOid),
Int32GetDatum(-1));
validUntil_null = false;
}
else
{
/* fetch existing setting in case hook needs it */
validUntil_datum = SysCacheGetAttr(AUTHNAME, tuple,
Anum_pg_authid_rolvaliduntil,
&validUntil_null);
}
/*
* Call the password checking hook if there is one defined
*/
if (check_password_hook && password)
(*check_password_hook) (rolename,
password,
get_password_type(password),
validUntil_datum,
validUntil_null);
/*
* Build an updated tuple, perusing the information just obtained
*/
MemSet(new_record, 0, sizeof(new_record));
MemSet(new_record_nulls, false, sizeof(new_record_nulls));
MemSet(new_record_repl, false, sizeof(new_record_repl));
/*
* issuper/createrole/etc
*/
if (issuper >= 0)
{
bool isNull;
Oid roleResgroup;
new_record[Anum_pg_authid_rolsuper - 1] = BoolGetDatum(issuper > 0);
new_record_repl[Anum_pg_authid_rolsuper - 1] = true;
roleResgroup = heap_getattr(tuple, Anum_pg_authid_rolresgroup,
pg_authid_dsc, &isNull);
if (!isNull)
{
/*
* change the default resource group accordingly: admin_group
* for superuser and default_group for non-superuser
*/
if (issuper == 0 && roleResgroup == ADMINRESGROUP_OID)
{
new_record[Anum_pg_authid_rolresgroup - 1] = ObjectIdGetDatum(DEFAULTRESGROUP_OID);
new_record_repl[Anum_pg_authid_rolresgroup - 1] = true;
}
else if (issuper > 0 && roleResgroup == DEFAULTRESGROUP_OID)
{
new_record[Anum_pg_authid_rolresgroup - 1] = ObjectIdGetDatum(ADMINRESGROUP_OID);
new_record_repl[Anum_pg_authid_rolresgroup - 1] = true;
}
}
/* get current superuser status */
bWas_super = (issuper > 0);
}
if (inherit >= 0)
{
new_record[Anum_pg_authid_rolinherit - 1] = BoolGetDatum(inherit > 0);
new_record_repl[Anum_pg_authid_rolinherit - 1] = true;
}
if (createrole >= 0)
{
new_record[Anum_pg_authid_rolcreaterole - 1] = BoolGetDatum(createrole > 0);
new_record_repl[Anum_pg_authid_rolcreaterole - 1] = true;
}
if (createdb >= 0)
{
new_record[Anum_pg_authid_rolcreatedb - 1] = BoolGetDatum(createdb > 0);
new_record_repl[Anum_pg_authid_rolcreatedb - 1] = true;
}
if (canlogin >= 0)
{
new_record[Anum_pg_authid_rolcanlogin - 1] = BoolGetDatum(canlogin > 0);
new_record_repl[Anum_pg_authid_rolcanlogin - 1] = true;
}
if (isreplication >= 0)
{
new_record[Anum_pg_authid_rolreplication - 1] = BoolGetDatum(isreplication > 0);
new_record_repl[Anum_pg_authid_rolreplication - 1] = true;
}
if (dconnlimit)
{
new_record[Anum_pg_authid_rolconnlimit - 1] = Int32GetDatum(connlimit);
new_record_repl[Anum_pg_authid_rolconnlimit - 1] = true;
}
/* password */
if (password)
{
char *shadow_pass;
char *logdetail;
/* Like in CREATE USER, don't allow an empty password. */
if (password[0] == '\0' ||
plain_crypt_verify(rolename, password, "", &logdetail) == STATUS_OK)
{
ereport(NOTICE,
(errmsg("empty string is not a valid password, clearing password")));
new_record_nulls[Anum_pg_authid_rolpassword - 1] = true;
}
else
{
/* Encrypt the password to the requested format. */
shadow_pass = encrypt_password(Password_encryption, rolename,
password);
new_record[Anum_pg_authid_rolpassword - 1] =
CStringGetTextDatum(shadow_pass);
}
new_record_repl[Anum_pg_authid_rolpassword - 1] = true;
}
/* unset password */
if (dpassword && dpassword->arg == NULL)
{
new_record_repl[Anum_pg_authid_rolpassword - 1] = true;
new_record_nulls[Anum_pg_authid_rolpassword - 1] = true;
}
/* valid until */
new_record[Anum_pg_authid_rolvaliduntil - 1] = validUntil_datum;
new_record_nulls[Anum_pg_authid_rolvaliduntil - 1] = validUntil_null;
new_record_repl[Anum_pg_authid_rolvaliduntil - 1] = true;
/* Set the CREATE EXTERNAL TABLE permissions for this role, if specified in ALTER */
if (exttabcreate || exttabnocreate)
{
bool isnull;
Datum dcreaterextgpfd;
Datum dcreaterexthttp;
Datum dcreatewextgpfd;
/*
* get bool values from catalog. we don't ever expect a NULL value, but just
* in case it is there (perhaps after an upgrade) we treat it as 'false'.
*/
dcreaterextgpfd = heap_getattr(tuple, Anum_pg_authid_rolcreaterextgpfd, pg_authid_dsc, &isnull);
createrextgpfd = (isnull ? false : DatumGetBool(dcreaterextgpfd));
dcreaterexthttp = heap_getattr(tuple, Anum_pg_authid_rolcreaterexthttp, pg_authid_dsc, &isnull);
createrexthttp = (isnull ? false : DatumGetBool(dcreaterexthttp));
dcreatewextgpfd = heap_getattr(tuple, Anum_pg_authid_rolcreatewextgpfd, pg_authid_dsc, &isnull);
createwextgpfd = (isnull ? false : DatumGetBool(dcreatewextgpfd));
SetCreateExtTableForRole(exttabcreate, exttabnocreate, &createrextgpfd,
&createrexthttp, &createwextgpfd);
new_record[Anum_pg_authid_rolcreaterextgpfd - 1] = BoolGetDatum(createrextgpfd);
new_record_repl[Anum_pg_authid_rolcreaterextgpfd - 1] = true;
new_record[Anum_pg_authid_rolcreaterexthttp - 1] = BoolGetDatum(createrexthttp);
new_record_repl[Anum_pg_authid_rolcreaterexthttp - 1] = true;
new_record[Anum_pg_authid_rolcreatewextgpfd - 1] = BoolGetDatum(createwextgpfd);
new_record_repl[Anum_pg_authid_rolcreatewextgpfd - 1] = true;
}
/* resource queue */
if (resqueue)
{
/* NONE not supported -- use default queue */
if (strcmp(resqueue, "none") == 0)
{
/*
* Don't complain if you ALTER a superuser, who doesn't use the
* queue
*/
if (!bWas_super && IsResQueueEnabled() && Gp_role == GP_ROLE_DISPATCH)
{
ereport(NOTICE,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("resource queue required -- using default resource queue \"%s\"",
GP_DEFAULT_RESOURCE_QUEUE_NAME)));
}
resqueue = pstrdup(GP_DEFAULT_RESOURCE_QUEUE_NAME);
}
queueid = GetResQueueIdForName(resqueue);
if (queueid == InvalidOid)
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_OBJECT),
errmsg("resource queue \"%s\" does not exist", resqueue)));
new_record[Anum_pg_authid_rolresqueue - 1] = ObjectIdGetDatum(queueid);
new_record_repl[Anum_pg_authid_rolresqueue - 1] = true;
if (!IsResQueueEnabled() && !bWas_super)
{
/*
* Don't complain if you ALTER a superuser, who doesn't use the
* queue
*/
ereport(WARNING,
(errmsg("resource queue is disabled"),
errhint("To enable set gp_resource_manager=queue.")));
}
}
/* resource group */
if (resgroup)
{
Oid rsgid;
if (strcmp(resgroup, "none") == 0)
{
if (bWas_super)
resgroup = pstrdup("admin_group");
else
resgroup = pstrdup("default_group");
if (IsResGroupActivated() && Gp_role == GP_ROLE_DISPATCH)
ereport(NOTICE,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("resource group required -- "
"using default resource group \"%s\"",
resgroup)));
}
rsgid = get_resgroup_oid(resgroup, false);
if (rsgid == ADMINRESGROUP_OID && !bWas_super)
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("only superuser can be assigned to admin resgroup")));
ResGroupCheckForRole(rsgid);
new_record[Anum_pg_authid_rolresgroup - 1] =
ObjectIdGetDatum(rsgid);
new_record_repl[Anum_pg_authid_rolresgroup - 1] = true;
if (!IsResGroupActivated() && Gp_role == GP_ROLE_DISPATCH)
{
ereport(WARNING,
(errmsg("resource group is disabled"),
errhint("To enable set gp_resource_manager=group")));
}
}
if (bypassrls >= 0)
{
new_record[Anum_pg_authid_rolbypassrls - 1] = BoolGetDatum(bypassrls > 0);
new_record_repl[Anum_pg_authid_rolbypassrls - 1] = true;
}
new_tuple = heap_modify_tuple(tuple, pg_authid_dsc, new_record,
new_record_nulls, new_record_repl);
CatalogTupleUpdate(pg_authid_rel, &tuple->t_self, new_tuple);
InvokeObjectPostAlterHook(AuthIdRelationId, roleid, 0);
ReleaseSysCache(tuple);
heap_freetuple(new_tuple);
/*
* Advance command counter so we can see new record; else tests in
* AddRoleMems may fail.
*/
if (rolemembers)
CommandCounterIncrement();
if (stmt->action == +1) /* add members to role */
{
if (rolemembers)
alter_subtype = "ADD USER";
AddRoleMems(rolename, roleid,
rolemembers, roleSpecsToIds(rolemembers),
GetUserId(), false);
}
else if (stmt->action == -1) /* drop members from role */
{
if (rolemembers)
alter_subtype = "DROP USER";
DelRoleMems(rolename, roleid,
rolemembers, roleSpecsToIds(rolemembers),
false);
}
if (bWas_super)
{
if (addintervals)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("cannot alter superuser with DENY rules")));
else
DelRoleDenials(rolename, roleid, NIL); /* drop all preexisting constraints, if any. */
}
/*
* Disallow the use of DENY and DROP DENY fragments in the same query.
*
* We do this to prevent commands with unusual behavior.
* e.g. consider "ALTER ROLE foo DENY DAY 0 DROP DENY FOR DAY 1 DENY DAY 1 DENY DAY 2"
* In the manner that this is currently coded, because all DENY fragments are interpreted
* first, this actually becomes equivalent to you "ALTER ROLE foo DENY DAY 0 DENY DAY 2".
*
* Instead, we could honor the order in which the fragments are presented, but still that
* allows users to contradict themselves, as in the example given.
*/
if (addintervals && dropintervals)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options"),
errhint("DENY and DROP DENY cannot be used in the same ALTER ROLE statement.")));
/*
* Populate pg_auth_time_constraint with the new intervals for which this
* particular role should be denied access.
*/
if (addintervals)
AddRoleDenials(rolename, roleid, addintervals);
/*
* Remove pg_auth_time_constraint entries that overlap with the
* intervals given by the user.
*/
if (dropintervals)
DelRoleDenials(rolename, roleid, dropintervals);
/* MPP-6929: metadata tracking */
if (Gp_role == GP_ROLE_DISPATCH)
MetaTrackUpdObject(AuthIdRelationId,
roleid,
GetUserId(),
"ALTER", alter_subtype);
/*
* Close pg_authid, but keep lock till commit.
*/
table_close(pg_authid_rel, NoLock);
if (Gp_role == GP_ROLE_DISPATCH)
{
CdbDispatchUtilityStatement((Node *) stmt,
DF_CANCEL_ON_ERROR|
DF_WITH_SNAPSHOT|
DF_NEED_TWO_PHASE,
NIL,
NULL);
}
return roleid;
}
/*
* ALTER ROLE ... SET
*/
Oid
AlterRoleSet(AlterRoleSetStmt *stmt)
{
HeapTuple roletuple;
Form_pg_authid roleform;
Oid databaseid = InvalidOid;
Oid roleid = InvalidOid;
if (stmt->role)
{
check_rolespec_name(stmt->role,
"Cannot alter reserved roles.");
roletuple = get_rolespec_tuple(stmt->role);
roleform = (Form_pg_authid) GETSTRUCT(roletuple);
roleid = roleform->oid;
/*
* Obtain a lock on the role and make sure it didn't go away in the
* meantime.
*/
shdepLockAndCheckObject(AuthIdRelationId, roleid);
/*
* To mess with a superuser you gotta be superuser; else you need
* createrole, or just want to change your own settings
*/
if (roleform->rolsuper)
{
if (!superuser())
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("must be superuser to alter superusers")));
}
else
{
if (!have_createrole_privilege() && roleid != GetUserId())
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("permission denied")));
}
ReleaseSysCache(roletuple);
}
/* look up and lock the database, if specified */
if (stmt->database != NULL)
{
databaseid = get_database_oid(stmt->database, false);
shdepLockAndCheckObject(DatabaseRelationId, databaseid);
if (!stmt->role)
{
/*
* If no role is specified, then this is effectively the same as
* ALTER DATABASE ... SET, so use the same permission check.
*/
if (!pg_database_ownercheck(databaseid, GetUserId()))
aclcheck_error(ACLCHECK_NOT_OWNER, OBJECT_DATABASE,
stmt->database);
}
}
if (!stmt->role && !stmt->database)
{
/* Must be superuser to alter settings globally. */
if (!superuser())
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("must be superuser to alter settings globally")));
}
AlterSetting(databaseid, roleid, stmt->setstmt);
return roleid;
}
/*
* DROP ROLE
*/
void
DropRole(DropRoleStmt *stmt)
{
Relation pg_authid_rel,
pg_auth_members_rel;
ListCell *item;
if (!have_createrole_privilege())
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("permission denied to drop role")));
/*
* Scan the pg_authid relation to find the Oid of the role(s) to be
* deleted.
*/
pg_authid_rel = table_open(AuthIdRelationId, RowExclusiveLock);
pg_auth_members_rel = table_open(AuthMemRelationId, RowExclusiveLock);
foreach(item, stmt->roles)
{
RoleSpec *rolspec = lfirst(item);
char *role;
HeapTuple tuple,
tmp_tuple;
Form_pg_authid roleform;
ScanKeyData scankey;
char *detail;
char *detail_log;
SysScanDesc sscan;
Oid roleid;
if (rolspec->roletype != ROLESPEC_CSTRING)
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("cannot use special role specifier in DROP ROLE")));
role = rolspec->rolename;
tuple = SearchSysCache1(AUTHNAME, PointerGetDatum(role));
if (!HeapTupleIsValid(tuple))
{
if (!stmt->missing_ok)
{
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_OBJECT),
errmsg("role \"%s\" does not exist", role)));
}
if (Gp_role != GP_ROLE_EXECUTE)
{
ereport(NOTICE,
(errmsg("role \"%s\" does not exist, skipping",
role)));
}
continue;
}
roleform = (Form_pg_authid) GETSTRUCT(tuple);
roleid = roleform->oid;
if (roleid == GetUserId())
ereport(ERROR,
(errcode(ERRCODE_OBJECT_IN_USE),
errmsg("current user cannot be dropped")));
if (roleid == GetOuterUserId())
ereport(ERROR,
(errcode(ERRCODE_OBJECT_IN_USE),
errmsg("current user cannot be dropped")));
if (roleid == GetSessionUserId())
ereport(ERROR,
(errcode(ERRCODE_OBJECT_IN_USE),
errmsg("session user cannot be dropped")));
/*
* For safety's sake, we allow createrole holders to drop ordinary
* roles but not superuser roles. This is mainly to avoid the
* scenario where you accidentally drop the last superuser.
*/
if (roleform->rolsuper && !superuser())
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("must be superuser to drop superusers")));
/* DROP hook for the role being removed */
InvokeObjectDropHook(AuthIdRelationId, roleid, 0);
/*
* Lock the role, so nobody can add dependencies to her while we drop
* her. We keep the lock until the end of transaction.
*/
LockSharedObject(AuthIdRelationId, roleid, 0, AccessExclusiveLock);
/* Check for pg_shdepend entries depending on this role */
if (checkSharedDependencies(AuthIdRelationId, roleid,
&detail, &detail_log))
ereport(ERROR,
(errcode(ERRCODE_DEPENDENT_OBJECTS_STILL_EXIST),
errmsg("role \"%s\" cannot be dropped because some objects depend on it",
role),
errdetail_internal("%s", detail),
errdetail_log("%s", detail_log)));
/*
* Remove the role from the pg_authid table
*/
CatalogTupleDelete(pg_authid_rel, &tuple->t_self);
ReleaseSysCache(tuple);
/*
* Remove role from the pg_auth_members table. We have to remove all
* tuples that show it as either a role or a member.
*
* XXX what about grantor entries? Maybe we should do one heap scan.
*/
ScanKeyInit(&scankey,
Anum_pg_auth_members_roleid,
BTEqualStrategyNumber, F_OIDEQ,
ObjectIdGetDatum(roleid));
sscan = systable_beginscan(pg_auth_members_rel, AuthMemRoleMemIndexId,
true, NULL, 1, &scankey);
while (HeapTupleIsValid(tmp_tuple = systable_getnext(sscan)))
{
CatalogTupleDelete(pg_auth_members_rel, &tmp_tuple->t_self);
}
systable_endscan(sscan);
ScanKeyInit(&scankey,
Anum_pg_auth_members_member,
BTEqualStrategyNumber, F_OIDEQ,
ObjectIdGetDatum(roleid));
sscan = systable_beginscan(pg_auth_members_rel, AuthMemMemRoleIndexId,
true, NULL, 1, &scankey);
while (HeapTupleIsValid(tmp_tuple = systable_getnext(sscan)))
{
CatalogTupleDelete(pg_auth_members_rel, &tmp_tuple->t_self);
}
systable_endscan(sscan);
/*
* Remove any time constraints on this role.
*/
DelRoleDenials(role, roleid, NIL);
/*
* Remove any comments or security labels on this role.
*/
DeleteSharedComments(roleid, AuthIdRelationId);
DeleteSharedSecurityLabel(roleid, AuthIdRelationId);
/* MPP-6929: metadata tracking */
if (Gp_role == GP_ROLE_DISPATCH)
MetaTrackDropObject(AuthIdRelationId,
roleid);
/*
* Remove settings for this role.
*/
DropSetting(InvalidOid, roleid);
/*
* Advance command counter so that later iterations of this loop will
* see the changes already made. This is essential if, for example,
* we are trying to drop both a role and one of its direct members ---
* we'll get an error if we try to delete the linking pg_auth_members
* tuple twice. (We do not need a CCI between the two delete loops
* above, because it's not allowed for a role to directly contain
* itself.)
*/
CommandCounterIncrement();
}
/*
* Now we can clean up; but keep locks until commit.
*/
table_close(pg_auth_members_rel, NoLock);
table_close(pg_authid_rel, NoLock);
if (Gp_role == GP_ROLE_DISPATCH)
{
CdbDispatchUtilityStatement((Node *) stmt,
DF_CANCEL_ON_ERROR|
DF_WITH_SNAPSHOT|
DF_NEED_TWO_PHASE,
NIL,
NULL);
}
}
/*
* Rename role
*/
ObjectAddress
RenameRole(const char *oldname, const char *newname)
{
HeapTuple oldtuple,
newtuple;
TupleDesc dsc;
Relation rel;
Datum datum;
bool isnull;
Datum repl_val[Natts_pg_authid];
bool repl_null[Natts_pg_authid];
bool repl_repl[Natts_pg_authid];
int i;
Oid roleid;
ObjectAddress address;
Form_pg_authid authform;
rel = table_open(AuthIdRelationId, RowExclusiveLock);
dsc = RelationGetDescr(rel);
oldtuple = SearchSysCache1(AUTHNAME, CStringGetDatum(oldname));
if (!HeapTupleIsValid(oldtuple))
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_OBJECT),
errmsg("role \"%s\" does not exist", oldname)));
/*
* XXX Client applications probably store the session user somewhere, so
* renaming it could cause confusion. On the other hand, there may not be
* an actual problem besides a little confusion, so think about this and
* decide. Same for SET ROLE ... we don't restrict renaming the current
* effective userid, though.
*/
authform = (Form_pg_authid) GETSTRUCT(oldtuple);
roleid = authform->oid;
if (roleid == GetSessionUserId())
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("session user cannot be renamed")));
if (roleid == GetOuterUserId())
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("current user cannot be renamed")));
/*
* Check that the user is not trying to rename a system role and not
* trying to rename a role into the reserved "pg_" namespace.
*/
if (IsReservedName(NameStr(authform->rolname)))
ereport(ERROR,
(errcode(ERRCODE_RESERVED_NAME),
errmsg("role name \"%s\" is reserved",
NameStr(authform->rolname)),
errdetail("Role names starting with \"pg_\" are reserved.")));
if (IsReservedName(newname))
ereport(ERROR,
(errcode(ERRCODE_RESERVED_NAME),
errmsg("role name \"%s\" is reserved",
newname),
errdetail("Role names starting with \"pg_\" are reserved.")));
/*
* If built with appropriate switch, whine when regression-testing
* conventions for role names are violated.
*/
#ifdef ENFORCE_REGRESSION_TEST_NAME_RESTRICTIONS
if (strncmp(newname, "regress_", 8) != 0)
elog(WARNING, "roles created by regression test cases should have names starting with \"regress_\"");
#endif
/* make sure the new name doesn't exist */
if (SearchSysCacheExists1(AUTHNAME, CStringGetDatum(newname)))
ereport(ERROR,
(errcode(ERRCODE_DUPLICATE_OBJECT),
errmsg("role \"%s\" already exists", newname)));
/*
* createrole is enough privilege unless you want to mess with a superuser
*/
if (((Form_pg_authid) GETSTRUCT(oldtuple))->rolsuper)
{
if (!superuser())
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("must be superuser to rename superusers")));
}
else
{
if (!have_createrole_privilege())
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("permission denied to rename role")));
}
/* OK, construct the modified tuple */
for (i = 0; i < Natts_pg_authid; i++)
repl_repl[i] = false;
repl_repl[Anum_pg_authid_rolname - 1] = true;
repl_val[Anum_pg_authid_rolname - 1] = DirectFunctionCall1(namein,
CStringGetDatum(newname));
repl_null[Anum_pg_authid_rolname - 1] = false;
datum = heap_getattr(oldtuple, Anum_pg_authid_rolpassword, dsc, &isnull);
if (!isnull && get_password_type(TextDatumGetCString(datum)) == PASSWORD_TYPE_MD5)
{
/* MD5 uses the username as salt, so just clear it on a rename */
repl_repl[Anum_pg_authid_rolpassword - 1] = true;
repl_null[Anum_pg_authid_rolpassword - 1] = true;
if (Gp_role != GP_ROLE_EXECUTE)
ereport(NOTICE,
(errmsg("MD5 password cleared because of role rename")));
}
newtuple = heap_modify_tuple(oldtuple, dsc, repl_val, repl_null, repl_repl);
CatalogTupleUpdate(rel, &oldtuple->t_self, newtuple);
InvokeObjectPostAlterHook(AuthIdRelationId, roleid, 0);
ObjectAddressSet(address, AuthIdRelationId, roleid);
ReleaseSysCache(oldtuple);
/*
* Close pg_authid, but keep lock till commit.
*/
table_close(rel, NoLock);
/* MPP-6929: metadata tracking */
if (Gp_role == GP_ROLE_DISPATCH)
MetaTrackUpdObject(AuthIdRelationId,
roleid,
GetUserId(),
"ALTER", "RENAME"
);
return address;
}
/*
* GrantRoleStmt
*
* Grant/Revoke roles to/from roles
*/
void
GrantRole(GrantRoleStmt *stmt)
{
Relation pg_authid_rel;
Oid grantor;
List *grantee_ids;
ListCell *item;
if (stmt->grantor)
grantor = get_rolespec_oid(stmt->grantor, false);
else
grantor = GetUserId();
grantee_ids = roleSpecsToIds(stmt->grantee_roles);
/* AccessShareLock is enough since we aren't modifying pg_authid */
pg_authid_rel = table_open(AuthIdRelationId, AccessShareLock);
/*
* Step through all of the granted roles and add/remove entries for the
* grantees, or, if admin_opt is set, then just add/remove the admin
* option.
*
* Note: Permissions checking is done by AddRoleMems/DelRoleMems
*/
foreach(item, stmt->granted_roles)
{
AccessPriv *priv = (AccessPriv *) lfirst(item);
char *rolename = priv->priv_name;
Oid roleid;
/* Must reject priv(columns) and ALL PRIVILEGES(columns) */
if (rolename == NULL || priv->cols != NIL)
ereport(ERROR,
(errcode(ERRCODE_INVALID_GRANT_OPERATION),
errmsg("column names cannot be included in GRANT/REVOKE ROLE")));
roleid = get_role_oid(rolename, false);
if (stmt->is_grant)
AddRoleMems(rolename, roleid,
stmt->grantee_roles, grantee_ids,
grantor, stmt->admin_opt);
else
DelRoleMems(rolename, roleid,
stmt->grantee_roles, grantee_ids,
stmt->admin_opt);
/* MPP-6929: metadata tracking */
if (Gp_role == GP_ROLE_DISPATCH)
MetaTrackUpdObject(AuthIdRelationId,
roleid,
GetUserId(),
"PRIVILEGE",
(stmt->is_grant) ? "GRANT" : "REVOKE"
);
}
/*
* Close pg_authid, but keep lock till commit.
*/
table_close(pg_authid_rel, NoLock);
if (Gp_role == GP_ROLE_DISPATCH)
CdbDispatchUtilityStatement((Node *) stmt,
DF_CANCEL_ON_ERROR|
DF_WITH_SNAPSHOT|
DF_NEED_TWO_PHASE,
NIL,
NULL);
}
/*
* DropOwnedObjects
*
* Drop the objects owned by a given list of roles.
*/
void
DropOwnedObjects(DropOwnedStmt *stmt)
{
List *role_ids = roleSpecsToIds(stmt->roles);
ListCell *cell;
/* Check privileges */
foreach(cell, role_ids)
{
Oid roleid = lfirst_oid(cell);
if (!has_privs_of_role(GetUserId(), roleid))
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("permission denied to drop objects")));
}
if (Gp_role == GP_ROLE_DISPATCH)
{
CdbDispatchUtilityStatement((Node *) stmt,
DF_CANCEL_ON_ERROR|
DF_WITH_SNAPSHOT|
DF_NEED_TWO_PHASE,
NIL,
NULL);
}
/* Ok, do it */
shdepDropOwned(role_ids, stmt->behavior);
}
/*
* ReassignOwnedObjects
*
* Give the objects owned by a given list of roles away to another user.
*/
void
ReassignOwnedObjects(ReassignOwnedStmt *stmt)
{
List *role_ids = roleSpecsToIds(stmt->roles);
ListCell *cell;
Oid newrole;
/* Check privileges */
foreach(cell, role_ids)
{
Oid roleid = lfirst_oid(cell);
if (!has_privs_of_role(GetUserId(), roleid))
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("permission denied to reassign objects")));
}
/* Must have privileges on the receiving side too */
newrole = get_rolespec_oid(stmt->newrole, false);
if (!has_privs_of_role(GetUserId(), newrole))
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("permission denied to reassign objects")));
if (Gp_role == GP_ROLE_DISPATCH)
{
CdbDispatchUtilityStatement((Node *) stmt,
DF_CANCEL_ON_ERROR|
DF_WITH_SNAPSHOT|
DF_NEED_TWO_PHASE,
NIL,
NULL);
}
/* Ok, do it */
shdepReassignOwned(role_ids, newrole);
}
/*
* roleSpecsToIds
*
* Given a list of RoleSpecs, generate a list of role OIDs in the same order.
*
* ROLESPEC_PUBLIC is not allowed.
*/
List *
roleSpecsToIds(List *memberNames)
{
List *result = NIL;
ListCell *l;
foreach(l, memberNames)
{
RoleSpec *rolespec = lfirst_node(RoleSpec, l);
Oid roleid;
roleid = get_rolespec_oid(rolespec, false);
result = lappend_oid(result, roleid);
}
return result;
}
/*
* AddRoleMems -- Add given members to the specified role
*
* rolename: name of role to add to (used only for error messages)
* roleid: OID of role to add to
* memberSpecs: list of RoleSpec of roles to add (used only for error messages)
* memberIds: OIDs of roles to add
* grantorId: who is granting the membership
* admin_opt: granting admin option?
*
* Note: caller is responsible for calling auth_file_update_needed().
*/
static void
AddRoleMems(const char *rolename, Oid roleid,
List *memberSpecs, List *memberIds,
Oid grantorId, bool admin_opt)
{
Relation pg_authmem_rel;
TupleDesc pg_authmem_dsc;
ListCell *specitem;
ListCell *iditem;
Assert(list_length(memberSpecs) == list_length(memberIds));
/* Skip permission check if nothing to do */
if (!memberIds)
return;
/*
* Check permissions: must have createrole or admin option on the role to
* be changed. To mess with a superuser role, you gotta be superuser.
*/
if (superuser_arg(roleid))
{
if (!superuser())
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("must be superuser to alter superusers")));
}
else
{
if (!have_createrole_privilege() &&
!is_admin_of_role(grantorId, roleid))
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("must have admin option on role \"%s\"",
rolename)));
}
/*
* The role membership grantor of record has little significance at
* present. Nonetheless, inasmuch as users might look to it for a crude
* audit trail, let only superusers impute the grant to a third party.
*
* Before lifting this restriction, give the member == role case of
* is_admin_of_role() a fresh look. Ensure that the current role cannot
* use an explicit grantor specification to take advantage of the session
* user's self-admin right.
*/
if (grantorId != GetUserId() && !superuser())
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("must be superuser to set grantor")));
pg_authmem_rel = table_open(AuthMemRelationId, RowExclusiveLock);
pg_authmem_dsc = RelationGetDescr(pg_authmem_rel);
forboth(specitem, memberSpecs, iditem, memberIds)
{
RoleSpec *memberRole = lfirst(specitem);
Oid memberid = lfirst_oid(iditem);
HeapTuple authmem_tuple;
HeapTuple tuple;
Datum new_record[Natts_pg_auth_members];
bool new_record_nulls[Natts_pg_auth_members];
bool new_record_repl[Natts_pg_auth_members];
/*
* Refuse creation of membership loops, including the trivial case
* where a role is made a member of itself. We do this by checking to
* see if the target role is already a member of the proposed member
* role. We have to ignore possible superuserness, however, else we
* could never grant membership in a superuser-privileged role.
*/
if (is_member_of_role_nosuper(roleid, memberid))
ereport(ERROR,
(errcode(ERRCODE_INVALID_GRANT_OPERATION),
(errmsg("role \"%s\" is a member of role \"%s\"",
rolename, get_rolespec_name(memberRole)))));
/*
* Check if entry for this role/member already exists; if so, give
* warning unless we are adding admin option.
*/
authmem_tuple = SearchSysCache2(AUTHMEMROLEMEM,
ObjectIdGetDatum(roleid),
ObjectIdGetDatum(memberid));
if (HeapTupleIsValid(authmem_tuple) &&
(!admin_opt ||
((Form_pg_auth_members) GETSTRUCT(authmem_tuple))->admin_option))
{
if (Gp_role != GP_ROLE_EXECUTE)
ereport(NOTICE,
(errmsg("role \"%s\" is already a member of role \"%s\"",
get_rolespec_name(memberRole), rolename)));
ReleaseSysCache(authmem_tuple);
continue;
}
/* Build a tuple to insert or update */
MemSet(new_record, 0, sizeof(new_record));
MemSet(new_record_nulls, false, sizeof(new_record_nulls));
MemSet(new_record_repl, false, sizeof(new_record_repl));
new_record[Anum_pg_auth_members_roleid - 1] = ObjectIdGetDatum(roleid);
new_record[Anum_pg_auth_members_member - 1] = ObjectIdGetDatum(memberid);
new_record[Anum_pg_auth_members_grantor - 1] = ObjectIdGetDatum(grantorId);
new_record[Anum_pg_auth_members_admin_option - 1] = BoolGetDatum(admin_opt);
if (HeapTupleIsValid(authmem_tuple))
{
new_record_repl[Anum_pg_auth_members_grantor - 1] = true;
new_record_repl[Anum_pg_auth_members_admin_option - 1] = true;
tuple = heap_modify_tuple(authmem_tuple, pg_authmem_dsc,
new_record,
new_record_nulls, new_record_repl);
CatalogTupleUpdate(pg_authmem_rel, &tuple->t_self, tuple);
ReleaseSysCache(authmem_tuple);
}
else
{
tuple = heap_form_tuple(pg_authmem_dsc,
new_record, new_record_nulls);
CatalogTupleInsert(pg_authmem_rel, tuple);
}
/* CCI after each change, in case there are duplicates in list */
CommandCounterIncrement();
}
/*
* Close pg_authmem, but keep lock till commit.
*/
table_close(pg_authmem_rel, NoLock);
}
/*
* CheckKeywordIsValid
*
* check that string in 'keyword' is included in set of strings in 'arr'
*/
static void CheckKeywordIsValid(char *keyword, const char **arr, const int arrsize)
{
int i = 0;
bool ok = false;
for(i = 0 ; i < arrsize ; i++)
{
if(strcasecmp(keyword, arr[i]) == 0)
ok = true;
}
if(!ok)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("invalid [NO]CREATEEXTTABLE option \"%s\"", keyword)));
}
/*
* CheckValueBelongsToKey
*
* check that value (e.g 'gpfdist') belogs to the key it was defined for (e.g 'protocol').
* error out otherwise (for example, [protocol='writable'] includes valid keywords, but makes
* no sense.
*/
static void CheckValueBelongsToKey(char *key, char *val, const char **keys, const char **vals)
{
if(strcasecmp(key, keys[0]) == 0)
{
if(strcasecmp(val, vals[0]) != 0 &&
strcasecmp(val, vals[1]) != 0)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("invalid %s value \"%s\"", key, val)));
}
else /* keys[1] */
{
if(strcasecmp(val, "gpfdist") != 0 &&
strcasecmp(val, "gpfdists") != 0 &&
strcasecmp(val, "http") != 0)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("invalid %s value \"%s\"", key, val)));
}
}
/*
* TransformExttabAuthClause
*
* Given a set of key value pairs, take them apart, fill in any default
* values, and validate that pairs are legal and make sense.
*
* defaults are:
* - 'readable' when no type defined,
* - 'gpfdist' when no protocol defined,
* - 'readable' + ' gpfdist' if both type and protocol aren't defined.
*
*/
static extAuthPair *
TransformExttabAuthClause(DefElem *defel)
{
List *l = (List *) defel->arg;
DefElem *d1,
*d2;
struct
{
char *key1;
char *val1;
char *key2;
char *val2;
} genpair;
const int numkeys = 2;
const int numvals = 5;
const char *keys[] = { "type", "protocol"}; /* order matters for validation. don't change! */
const char *vals[] = { /* types */ "readable", "writable",
/* protocols */ "gpfdist", "gpfdists" , "http"};
extAuthPair *result;
if(list_length(l) > 2)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("invalid [NO]CREATEEXTTABLE specification. too many values")));
if(list_length(l) == 2)
{
/* both a protocol and type specification */
d1 = (DefElem *) linitial(l);
genpair.key1 = pstrdup(d1->defname);
genpair.val1 = pstrdup(strVal(d1->arg));
d2 = (DefElem *) lsecond(l);
genpair.key2 = pstrdup(d2->defname);
genpair.val2 = pstrdup(strVal(d2->arg));
}
else if(list_length(l) == 1)
{
/* either a protocol or type specification */
d1 = (DefElem *) linitial(l);
genpair.key1 = pstrdup(d1->defname);
genpair.val1 = pstrdup(strVal(d1->arg));
if(strcasecmp(genpair.key1, "type") == 0)
{
/* default value for missing protocol */
genpair.key2 = pstrdup("protocol");
genpair.val2 = pstrdup("gpfdist");
}
else
{
/* default value for missing type */
genpair.key2 = pstrdup("type");
genpair.val2 = pstrdup("readable");
}
}
else
{
/* none specified. use global default */
genpair.key1 = pstrdup("protocol");
genpair.val1 = pstrdup("gpfdist");
genpair.key2 = pstrdup("type");
genpair.val2 = pstrdup("readable");
}
/* check all keys and values are legal */
CheckKeywordIsValid(genpair.key1, keys, numkeys);
CheckKeywordIsValid(genpair.key2, keys, numkeys);
CheckKeywordIsValid(genpair.val1, vals, numvals);
CheckKeywordIsValid(genpair.val2, vals, numvals);
/* check all values are of the proper key */
CheckValueBelongsToKey(genpair.key1, genpair.val1, keys, vals);
CheckValueBelongsToKey(genpair.key2, genpair.val2, keys, vals);
if (strcasecmp(genpair.key1, genpair.key2) == 0)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("redundant option for \"%s\"", genpair.key1)));
/* now create the result struct */
result = (extAuthPair *) palloc(sizeof(extAuthPair));
if (strcasecmp(genpair.key1, "protocol") == 0)
{
result->protocol = pstrdup(genpair.val1);
result->type = pstrdup(genpair.val2);
}
else
{
result->protocol = pstrdup(genpair.val2);
result->type = pstrdup(genpair.val1);
}
pfree(genpair.key1);
pfree(genpair.key2);
pfree(genpair.val1);
pfree(genpair.val2);
return result;
}
/*
* SetCreateExtTableForRole
*
* Given the allow list (permissions to add) and disallow (permissions
* to take away) consolidate this information into the 3 catalog
* boolean columns that will need to get updated. While at it we check
* that all the options are valid and don't conflict with each other.
*
*/
static void SetCreateExtTableForRole(List* allow,
List* disallow,
bool* createrextgpfd,
bool* createrexthttp,
bool* createwextgpfd)
{
ListCell* lc;
bool createrextgpfd_specified = false;
bool createwextgpfd_specified = false;
bool createrexthttp_specified = false;
if(list_length(allow) > 0)
{
/* examine key value pairs */
foreach(lc, allow)
{
extAuthPair* extauth = (extAuthPair*) lfirst(lc);
/* we use the same privilege for gpfdist and gpfdists */
if ((strcasecmp(extauth->protocol, "gpfdist") == 0) ||
(strcasecmp(extauth->protocol, "gpfdists") == 0))
{
if(strcasecmp(extauth->type, "readable") == 0)
{
*createrextgpfd = true;
createrextgpfd_specified = true;
}
else
{
*createwextgpfd = true;
createwextgpfd_specified = true;
}
}
else /* http */
{
if(strcasecmp(extauth->type, "readable") == 0)
{
*createrexthttp = true;
createrexthttp_specified = true;
}
else
{
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("invalid CREATEEXTTABLE specification. writable http external tables do not exist")));
}
}
}
}
/*
* go over the disallow list.
* if we're in CREATE ROLE, check that we don't negate something from the
* allow list. error out with conflicting options if we do.
* if we're in ALTER ROLE, just set the flags accordingly.
*/
if(list_length(disallow) > 0)
{
bool conflict = false;
/* examine key value pairs */
foreach(lc, disallow)
{
extAuthPair* extauth = (extAuthPair*) lfirst(lc);
/* we use the same privilege for gpfdist and gpfdists */
if ((strcasecmp(extauth->protocol, "gpfdist") == 0) ||
(strcasecmp(extauth->protocol, "gpfdists") == 0))
{
if(strcasecmp(extauth->type, "readable") == 0)
{
if(createrextgpfd_specified)
conflict = true;
*createrextgpfd = false;
}
else
{
if(createwextgpfd_specified)
conflict = true;
*createwextgpfd = false;
}
}
else /* http */
{
if(strcasecmp(extauth->type, "readable") == 0)
{
if(createrexthttp_specified)
conflict = true;
*createrexthttp = false;
}
else
{
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("invalid NOCREATEEXTTABLE specification. writable http external tables do not exist")));
}
}
}
if(conflict)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting specifications in CREATEEXTTABLE and NOCREATEEXTTABLE")));
}
}
/*
* DelRoleMems -- Remove given members from the specified role
*
* rolename: name of role to del from (used only for error messages)
* roleid: OID of role to del from
* memberSpecs: list of RoleSpec of roles to del (used only for error messages)
* memberIds: OIDs of roles to del
* admin_opt: remove admin option only?
*
* Note: caller is responsible for calling auth_file_update_needed().
*/
static void
DelRoleMems(const char *rolename, Oid roleid,
List *memberSpecs, List *memberIds,
bool admin_opt)
{
Relation pg_authmem_rel;
TupleDesc pg_authmem_dsc;
ListCell *specitem;
ListCell *iditem;
Assert(list_length(memberSpecs) == list_length(memberIds));
/* Skip permission check if nothing to do */
if (!memberIds)
return;
/*
* Check permissions: must have createrole or admin option on the role to
* be changed. To mess with a superuser role, you gotta be superuser.
*/
if (superuser_arg(roleid))
{
if (!superuser())
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("must be superuser to alter superusers")));
}
else
{
if (!have_createrole_privilege() &&
!is_admin_of_role(GetUserId(), roleid))
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("must have admin option on role \"%s\"",
rolename)));
}
pg_authmem_rel = table_open(AuthMemRelationId, RowExclusiveLock);
pg_authmem_dsc = RelationGetDescr(pg_authmem_rel);
forboth(specitem, memberSpecs, iditem, memberIds)
{
RoleSpec *memberRole = lfirst(specitem);
Oid memberid = lfirst_oid(iditem);
HeapTuple authmem_tuple;
/*
* Find entry for this role/member
*/
authmem_tuple = SearchSysCache2(AUTHMEMROLEMEM,
ObjectIdGetDatum(roleid),
ObjectIdGetDatum(memberid));
if (!HeapTupleIsValid(authmem_tuple))
{
ereport(WARNING,
(errmsg("role \"%s\" is not a member of role \"%s\"",
get_rolespec_name(memberRole), rolename)));
continue;
}
if (!admin_opt)
{
/* Remove the entry altogether */
CatalogTupleDelete(pg_authmem_rel, &authmem_tuple->t_self);
}
else
{
/* Just turn off the admin option */
HeapTuple tuple;
Datum new_record[Natts_pg_auth_members];
bool new_record_nulls[Natts_pg_auth_members];
bool new_record_repl[Natts_pg_auth_members];
/* Build a tuple to update with */
MemSet(new_record, 0, sizeof(new_record));
MemSet(new_record_nulls, false, sizeof(new_record_nulls));
MemSet(new_record_repl, false, sizeof(new_record_repl));
new_record[Anum_pg_auth_members_admin_option - 1] = BoolGetDatum(false);
new_record_repl[Anum_pg_auth_members_admin_option - 1] = true;
tuple = heap_modify_tuple(authmem_tuple, pg_authmem_dsc,
new_record,
new_record_nulls, new_record_repl);
CatalogTupleUpdate(pg_authmem_rel, &tuple->t_self, tuple);
}
ReleaseSysCache(authmem_tuple);
/* CCI after each change, in case there are duplicates in list */
CommandCounterIncrement();
}
/*
* Close pg_authmem, but keep lock till commit.
*/
table_close(pg_authmem_rel, NoLock);
}
/*
* ExtractAuthIntervalClause
*
* Build an authInterval struct (defined above) from given input
*/
static void
ExtractAuthIntervalClause(DefElem *defel, authInterval *interval)
{
DenyLoginPoint *start = NULL, *end = NULL;
char *temp;
if (IsA(defel->arg, DenyLoginInterval))
{
DenyLoginInterval *span = (DenyLoginInterval *)defel->arg;
start = span->start;
end = span->end;
}
else
{
Assert(IsA(defel->arg, DenyLoginPoint));
start = (DenyLoginPoint *)defel->arg;
end = start;
}
interval->start.day = ExtractAuthInterpretDay(start->day);
temp = start->time != NULL ? strVal(start->time) : "00:00:00";
interval->start.time = DatumGetTimeADT(DirectFunctionCall1(time_in, CStringGetDatum(temp)));
interval->end.day = ExtractAuthInterpretDay(end->day);
temp = end->time != NULL ? strVal(end->time) : "24:00:00";
interval->end.time = DatumGetTimeADT(DirectFunctionCall1(time_in, CStringGetDatum(temp)));
if (point_cmp(&interval->start, &interval->end) > 0)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("time interval must not wrap around")));
}
/*
* TransferAuthInterpretDay -- Interpret day of week from parse node
*
* day: node which dictates a day of week;
* may be either an integer in [0, 6]
* or a string giving name of day in English
*/
static int16
ExtractAuthInterpretDay(Value * day)
{
int16 ret;
if (day->type == T_Integer)
{
ret = intVal(day);
if (ret < 0 || ret > 6)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("numeric day of week must be between 0 and 6")));
}
else
{
int16 elems = 7;
char *target = strVal(day);
for (ret = 0; ret < elems; ret++)
if (strcasecmp(target, daysofweek[ret]) == 0)
break;
if (ret == elems)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("invalid weekday name \"%s\"", target),
errhint("Day of week must be one of 'Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'.")));
}
return ret;
}
/*
* AddRoleDenials -- Populate pg_auth_time_constraint
*
* rolename: name of role to add to (used only for error messages)
* roleid: OID of role to add to
* addintervals: list of authInterval structs dictating when
* this particular role should be denied access
*
* Note: caller is reponsible for checking permissions to edit the given role.
*/
static void
AddRoleDenials(const char *rolename, Oid roleid, List *addintervals)
{
Relation pg_auth_time_rel;
TupleDesc pg_auth_time_dsc;
ListCell *intervalitem;
pg_auth_time_rel = table_open(AuthTimeConstraintRelationId, RowExclusiveLock);
pg_auth_time_dsc = RelationGetDescr(pg_auth_time_rel);
foreach(intervalitem, addintervals)
{
authInterval *interval = (authInterval *)lfirst(intervalitem);
HeapTuple tuple;
Datum new_record[Natts_pg_auth_time_constraint];
bool new_record_nulls[Natts_pg_auth_time_constraint];
/* Build a tuple to insert or update */
MemSet(new_record, 0, sizeof(new_record));
MemSet(new_record_nulls, false, sizeof(new_record_nulls));
new_record[Anum_pg_auth_time_constraint_authid - 1] = ObjectIdGetDatum(roleid);
new_record[Anum_pg_auth_time_constraint_start_day - 1] = Int16GetDatum(interval->start.day);
new_record[Anum_pg_auth_time_constraint_start_time - 1] = TimeADTGetDatum(interval->start.time);
new_record[Anum_pg_auth_time_constraint_end_day - 1] = Int16GetDatum(interval->end.day);
new_record[Anum_pg_auth_time_constraint_end_time - 1] = TimeADTGetDatum(interval->end.time);
tuple = heap_form_tuple(pg_auth_time_dsc, new_record, new_record_nulls);
/* Insert tuple into the relation */
CatalogTupleInsert(pg_auth_time_rel, tuple);
}
CommandCounterIncrement();
/*
* Close pg_auth_time_constraint, but keep lock till commit (this is important to
* prevent any risk of deadlock failure while updating flat file)
*/
table_close(pg_auth_time_rel, NoLock);
}
/*
* DelRoleDenials -- Trim pg_auth_time_constraint
*
* rolename: name of role to edit (used only for error messages)
* roleid: OID of role to edit
* dropintervals: list of authInterval structs dictating which
* existing rules should be dropped. Here, NIL will mean
* remove all constraints for the given role.
*
* Note: caller is reponsible for checking permissions to edit the given role.
*/
static void
DelRoleDenials(const char *rolename, Oid roleid, List *dropintervals)
{
Relation pg_auth_time_rel;
ScanKeyData scankey;
SysScanDesc sscan;
ListCell *intervalitem;
bool dropped_matching_interval = false;
HeapTuple tmp_tuple;
pg_auth_time_rel = table_open(AuthTimeConstraintRelationId, RowExclusiveLock);
ScanKeyInit(&scankey,
Anum_pg_auth_time_constraint_authid,
BTEqualStrategyNumber, F_OIDEQ,
ObjectIdGetDatum(roleid));
sscan = systable_beginscan(pg_auth_time_rel, InvalidOid,
false, NULL, 1, &scankey);
while (HeapTupleIsValid(tmp_tuple = systable_getnext(sscan)))
{
if (dropintervals != NIL)
{
Form_pg_auth_time_constraint obj = (Form_pg_auth_time_constraint) GETSTRUCT(tmp_tuple);
authInterval *interval, *existing = (authInterval *) palloc0(sizeof(authInterval));
existing->start.day = obj->start_day;
existing->start.time = obj->start_time;
existing->end.day = obj->end_day;
existing->end.time = obj->end_time;
foreach(intervalitem, dropintervals)
{
interval = (authInterval *)lfirst(intervalitem);
if (interval_overlap(existing, interval))
{
if (Gp_role == GP_ROLE_DISPATCH)
ereport(NOTICE,
(errmsg("dropping DENY rule for \"%s\" between %s %s and %s %s",
rolename,
daysofweek[existing->start.day],
DatumGetCString(DirectFunctionCall1(time_out, TimeADTGetDatum(existing->start.time))),
daysofweek[existing->end.day],
DatumGetCString(DirectFunctionCall1(time_out, TimeADTGetDatum(existing->end.time))))));
CatalogTupleDelete(pg_auth_time_rel, &tmp_tuple->t_self);
dropped_matching_interval = true;
break;
}
}
}
else
CatalogTupleDelete(pg_auth_time_rel, &tmp_tuple->t_self);
}
/* if intervals were specified and none was found, raise error */
if (dropintervals && !dropped_matching_interval)
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_OBJECT),
errmsg("cannot find matching DENY rules for \"%s\"", rolename)));
systable_endscan(sscan);
/*
* Close pg_auth_time_constraint, but keep lock till commit (this is important to
* prevent any risk of deadlock failure while updating flat file)
*/
table_close(pg_auth_time_rel, NoLock);
}
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