1 /* delete.cpp - ndb backend delete routine */
2 /* $OpenLDAP$ */
3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
4 *
5 * Copyright 2008-2021 The OpenLDAP Foundation.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted only as authorized by the OpenLDAP
10 * Public License.
11 *
12 * A copy of this license is available in the file LICENSE in the
13 * top-level directory of the distribution or, alternatively, at
14 * <http://www.OpenLDAP.org/license.html>.
15 */
16 /* ACKNOWLEDGEMENTS:
17 * This work was initially developed by Howard Chu for inclusion
18 * in OpenLDAP Software. This work was sponsored by MySQL.
19 */
20
21 #include "portable.h"
22
23 #include <stdio.h>
24 #include <ac/string.h>
25
26 #include "lutil.h"
27 #include "back-ndb.h"
28
29 static struct berval glue_bv = BER_BVC("glue");
30
31 int
ndb_back_delete(Operation * op,SlapReply * rs)32 ndb_back_delete( Operation *op, SlapReply *rs )
33 {
34 struct ndb_info *ni = (struct ndb_info *) op->o_bd->be_private;
35 Entry e = {0};
36 Entry p = {0};
37 int manageDSAit = get_manageDSAit( op );
38 AttributeDescription *children = slap_schema.si_ad_children;
39 AttributeDescription *entry = slap_schema.si_ad_entry;
40
41 NdbArgs NA;
42 NdbRdns rdns;
43 struct berval matched;
44
45 int num_retries = 0;
46
47 int rc;
48
49 LDAPControl **preread_ctrl = NULL;
50 LDAPControl *ctrls[SLAP_MAX_RESPONSE_CONTROLS];
51 int num_ctrls = 0;
52
53 Debug( LDAP_DEBUG_ARGS, "==> " LDAP_XSTRING(ndb_back_delete) ": %s\n",
54 op->o_req_dn.bv_val, 0, 0 );
55
56 ctrls[num_ctrls] = 0;
57
58 /* allocate CSN */
59 if ( BER_BVISNULL( &op->o_csn ) ) {
60 struct berval csn;
61 char csnbuf[LDAP_PVT_CSNSTR_BUFSIZE];
62
63 csn.bv_val = csnbuf;
64 csn.bv_len = sizeof(csnbuf);
65 slap_get_csn( op, &csn, 1 );
66 }
67
68 if ( !be_issuffix( op->o_bd, &op->o_req_ndn ) ) {
69 dnParent( &op->o_req_dn, &p.e_name );
70 dnParent( &op->o_req_ndn, &p.e_nname );
71 }
72
73 /* Get our NDB handle */
74 rs->sr_err = ndb_thread_handle( op, &NA.ndb );
75 rdns.nr_num = 0;
76 NA.rdns = &rdns;
77 NA.ocs = NULL;
78 NA.e = &e;
79 e.e_name = op->o_req_dn;
80 e.e_nname = op->o_req_ndn;
81
82 if( 0 ) {
83 retry: /* transaction retry */
84 NA.txn->close();
85 NA.txn = NULL;
86 Debug( LDAP_DEBUG_TRACE,
87 "==> " LDAP_XSTRING(ndb_back_delete) ": retrying...\n",
88 0, 0, 0 );
89 if ( op->o_abandon ) {
90 rs->sr_err = SLAPD_ABANDON;
91 goto return_results;
92 }
93 if ( NA.ocs ) {
94 ber_bvarray_free( NA.ocs );
95 NA.ocs = NULL;
96 }
97 ndb_trans_backoff( ++num_retries );
98 }
99
100 /* begin transaction */
101 NA.txn = NA.ndb->startTransaction();
102 rs->sr_text = NULL;
103 if( !NA.txn ) {
104 Debug( LDAP_DEBUG_TRACE,
105 LDAP_XSTRING(ndb_back_delete) ": startTransaction failed: %s (%d)\n",
106 NA.ndb->getNdbError().message, NA.ndb->getNdbError().code, 0 );
107 rs->sr_err = LDAP_OTHER;
108 rs->sr_text = "internal error";
109 goto return_results;
110 }
111
112 /* get entry */
113 rs->sr_err = ndb_entry_get_info( op, &NA, 1, &matched );
114 switch( rs->sr_err ) {
115 case 0:
116 case LDAP_NO_SUCH_OBJECT:
117 break;
118 #if 0
119 case DB_LOCK_DEADLOCK:
120 case DB_LOCK_NOTGRANTED:
121 goto retry;
122 #endif
123 case LDAP_BUSY:
124 rs->sr_text = "ldap server busy";
125 goto return_results;
126 default:
127 rs->sr_err = LDAP_OTHER;
128 rs->sr_text = "internal error";
129 goto return_results;
130 }
131
132 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ||
133 ( !manageDSAit && bvmatch( NA.ocs, &glue_bv ))) {
134 Debug( LDAP_DEBUG_ARGS,
135 "<=- " LDAP_XSTRING(ndb_back_delete) ": no such object %s\n",
136 op->o_req_dn.bv_val, 0, 0);
137
138 if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
139 rs->sr_matched = matched.bv_val;
140 if ( NA.ocs )
141 ndb_check_referral( op, rs, &NA );
142 } else {
143 rs->sr_matched = p.e_name.bv_val;
144 rs->sr_err = LDAP_NO_SUCH_OBJECT;
145 }
146 goto return_results;
147 }
148
149 /* check parent for "children" acl */
150 rs->sr_err = access_allowed( op, &p,
151 children, NULL, ACL_WDEL, NULL );
152
153 if ( !rs->sr_err ) {
154 Debug( LDAP_DEBUG_TRACE,
155 "<=- " LDAP_XSTRING(ndb_back_delete) ": no write "
156 "access to parent\n", 0, 0, 0 );
157 rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
158 rs->sr_text = "no write access to parent";
159 goto return_results;
160 }
161
162 rs->sr_err = ndb_entry_get_data( op, &NA, 1 );
163
164 rs->sr_err = access_allowed( op, &e,
165 entry, NULL, ACL_WDEL, NULL );
166
167 if ( !rs->sr_err ) {
168 Debug( LDAP_DEBUG_TRACE,
169 "<=- " LDAP_XSTRING(ndb_back_delete) ": no write access "
170 "to entry\n", 0, 0, 0 );
171 rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
172 rs->sr_text = "no write access to entry";
173 goto return_results;
174 }
175
176 if ( !manageDSAit && is_entry_referral( &e ) ) {
177 /* entry is a referral, don't allow delete */
178 rs->sr_ref = get_entry_referrals( op, &e );
179
180 Debug( LDAP_DEBUG_TRACE,
181 LDAP_XSTRING(ndb_back_delete) ": entry is referral\n",
182 0, 0, 0 );
183
184 rs->sr_err = LDAP_REFERRAL;
185 rs->sr_matched = e.e_name.bv_val;
186 rs->sr_flags = REP_REF_MUSTBEFREED;
187 goto return_results;
188 }
189
190 if ( get_assert( op ) &&
191 ( test_filter( op, &e, (Filter *)get_assertion( op )) != LDAP_COMPARE_TRUE ))
192 {
193 rs->sr_err = LDAP_ASSERTION_FAILED;
194 goto return_results;
195 }
196
197 /* pre-read */
198 if( op->o_preread ) {
199 if( preread_ctrl == NULL ) {
200 preread_ctrl = &ctrls[num_ctrls++];
201 ctrls[num_ctrls] = NULL;
202 }
203 if( slap_read_controls( op, rs, &e,
204 &slap_pre_read_bv, preread_ctrl ) )
205 {
206 Debug( LDAP_DEBUG_TRACE,
207 "<=- " LDAP_XSTRING(ndb_back_delete) ": pre-read "
208 "failed!\n", 0, 0, 0 );
209 if ( op->o_preread & SLAP_CONTROL_CRITICAL ) {
210 /* FIXME: is it correct to abort
211 * operation if control fails? */
212 goto return_results;
213 }
214 }
215 }
216
217 /* Can't do it if we have kids */
218 rs->sr_err = ndb_has_children( &NA, &rc );
219 if ( rs->sr_err ) {
220 Debug(LDAP_DEBUG_ARGS,
221 "<=- " LDAP_XSTRING(ndb_back_delete)
222 ": has_children failed: %s (%d)\n",
223 NA.txn->getNdbError().message, NA.txn->getNdbError().code, 0 );
224 rs->sr_err = LDAP_OTHER;
225 rs->sr_text = "internal error";
226 goto return_results;
227 }
228 if ( rc == LDAP_COMPARE_TRUE ) {
229 Debug(LDAP_DEBUG_ARGS,
230 "<=- " LDAP_XSTRING(ndb_back_delete)
231 ": non-leaf %s\n",
232 op->o_req_dn.bv_val, 0, 0);
233 rs->sr_err = LDAP_NOT_ALLOWED_ON_NONLEAF;
234 rs->sr_text = "subordinate objects must be deleted first";
235 goto return_results;
236 }
237
238 /* delete info */
239 rs->sr_err = ndb_entry_del_info( op->o_bd, &NA );
240 if ( rs->sr_err != 0 ) {
241 Debug(LDAP_DEBUG_TRACE,
242 "<=- " LDAP_XSTRING(ndb_back_delete) ": del_info failed: %s (%d)\n",
243 NA.txn->getNdbError().message, NA.txn->getNdbError().code, 0 );
244 rs->sr_text = "DN index delete failed";
245 rs->sr_err = LDAP_OTHER;
246 goto return_results;
247 }
248
249 /* delete data */
250 rs->sr_err = ndb_entry_del_data( op->o_bd, &NA );
251 if ( rs->sr_err != 0 ) {
252 Debug( LDAP_DEBUG_TRACE,
253 "<=- " LDAP_XSTRING(ndb_back_delete) ": del_data failed: %s (%d)\n",
254 NA.txn->getNdbError().message, NA.txn->getNdbError().code, 0 );
255 rs->sr_text = "entry delete failed";
256 rs->sr_err = LDAP_OTHER;
257 goto return_results;
258 }
259
260 if( op->o_noop ) {
261 if (( rs->sr_err=NA.txn->execute( NdbTransaction::Rollback,
262 NdbOperation::AbortOnError, 1 )) != 0 ) {
263 rs->sr_text = "txn (no-op) failed";
264 } else {
265 rs->sr_err = LDAP_X_NO_OPERATION;
266 }
267 } else {
268 if (( rs->sr_err=NA.txn->execute( NdbTransaction::Commit,
269 NdbOperation::AbortOnError, 1 )) != 0 ) {
270 rs->sr_text = "txn_commit failed";
271 } else {
272 rs->sr_err = LDAP_SUCCESS;
273 }
274 }
275
276 if( rs->sr_err != LDAP_SUCCESS && rs->sr_err != LDAP_X_NO_OPERATION ) {
277 Debug( LDAP_DEBUG_TRACE,
278 LDAP_XSTRING(ndb_back_delete) ": txn_%s failed: %s (%d)\n",
279 op->o_noop ? "abort (no-op)" : "commit",
280 NA.txn->getNdbError().message, NA.txn->getNdbError().code );
281 rs->sr_err = LDAP_OTHER;
282 rs->sr_text = "commit failed";
283
284 goto return_results;
285 }
286 NA.txn->close();
287 NA.txn = NULL;
288
289 Debug( LDAP_DEBUG_TRACE,
290 LDAP_XSTRING(ndb_back_delete) ": deleted%s id=%08lx dn=\"%s\"\n",
291 op->o_noop ? " (no-op)" : "",
292 e.e_id, op->o_req_dn.bv_val );
293 rs->sr_err = LDAP_SUCCESS;
294 rs->sr_text = NULL;
295 if( num_ctrls ) rs->sr_ctrls = ctrls;
296
297 return_results:
298 if ( NA.ocs ) {
299 ber_bvarray_free_x( NA.ocs, op->o_tmpmemctx );
300 NA.ocs = NULL;
301 }
302
303 /* free entry */
304 if( e.e_attrs != NULL ) {
305 attrs_free( e.e_attrs );
306 e.e_attrs = NULL;
307 }
308
309 if( NA.txn != NULL ) {
310 NA.txn->execute( Rollback );
311 NA.txn->close();
312 }
313
314 send_ldap_result( op, rs );
315 slap_graduate_commit_csn( op );
316
317 if( preread_ctrl != NULL && (*preread_ctrl) != NULL ) {
318 slap_sl_free( (*preread_ctrl)->ldctl_value.bv_val, op->o_tmpmemctx );
319 slap_sl_free( *preread_ctrl, op->o_tmpmemctx );
320 }
321 return rs->sr_err;
322 }
323