1    | /***************************************
2    |   $Revision: 1.25 $
3    | 
4    |   rollback(), commit(), delete() - rollback, commit update transaction, delete an object
5    | 
6    |   Status: NOT REVUED, NOT TESTED
7    | 
8    |  Author(s):       Andrei Robachevsky
9    | 
10   |   ******************/ /******************
11   |   Modification History:
12   |         andrei (17/01/2000) Created.
13   |   ******************/ /******************
14   |   Copyright (c) 2000                              RIPE NCC
15   |  
16   |   All Rights Reserved
17   |   
18   |   Permission to use, copy, modify, and distribute this software and its
19   |   documentation for any purpose and without fee is hereby granted,
20   |   provided that the above copyright notice appear in all copies and that
21   |   both that copyright notice and this permission notice appear in
22   |   supporting documentation, and that the name of the author not be
23   |   used in advertising or publicity pertaining to distribution of the
24   |   software without specific, written prior permission.
25   |   
26   |   THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
27   |   ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS; IN NO EVENT SHALL
28   |   AUTHOR BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
29   |   DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
30   |   AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
31   |   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
32   |  ***************************************/
33   | #include "ud.h"
34   | #include "ud_int.h"
35   | #include "ud_comrol.h"
36   | #include "ud_tr.h"
37   | #include "rp.h"
38   | 
39   | 
40   | /************************************************************
41   | * int UD_rollback()                                         *
42   | *                                                           *
43   | * Rolls back the transaction                                *
44   | *                                                           *
45   | * It locks all relevant tables and processes the rollback   *
46   | * General approach is to delete all new records related     *
47   | * to the transaction (thread_id==thread_ins) and clean up   *
48   | * old ones (thread_id==thread_upd)                          *
49   | *                                                           *
50   | ************************************************************/
51   |  
52   | int UD_rollback(Transaction_t *tr) {
53   | GString *query;
54   | int i, j;
55   | int sql_err;
56   | 
57   |  if(ACT_DELETE(tr->action)) return(0);
58   | 	
59   |  if ((query = g_string_sized_new(STR_XXL)) == NULL){ 
60   |    ER_perror(FAC_UD, UD_MEM, "cannot allocate gstring\n");
61   |    tr->succeeded=0;
62   |    tr->error |= ERROR_U_MEM;
63   |    die; 
64   |  }
65   | 
66   | /* Lock all relevant tables */
67   |    g_string_sprintf(query, "LOCK TABLES ");
68   |    
69   |    /* we need to lock tables for mntner and role differently, otherwise there will be duplicates (names names, etc.)*/
70   |    if((tr->class_type!=C_MT) && (tr->class_type!=C_RO)){
71   |     g_string_sprintfa(query, " %s WRITE,",  DF_get_class_sql_table(tr->class_type));
72   |     
73   |     for (i=0; tables[tr->class_type][i] != NULL; i++) 
74   |       g_string_sprintfa(query, " %s WRITE,", tables[tr->class_type][i]);
75   |    } else { /* mntner and role are special cases */
76   |       g_string_sprintfa(query, " mntner WRITE, person_role WRITE, ");
77   |    }
78   |    
79   |     for (i=TAB_START; tables[tr->class_type][i] != NULL; i++)
80   |       g_string_sprintfa(query, " %s WRITE,", tables[tr->class_type][i]);
81   |     
82   |     g_string_sprintfa(query, " last WRITE, history WRITE ");
83   |     
84   |     sql_err=SQ_execute_query(tr->sql_connection, query->str, NULL);
85   | 
86   | /* Process AUX and LEAF tables */
87   |     for (i=TAB_START; tables[tr->class_type][i] != NULL; i++) {
88   |     /* Delete what has been inserted */
89   |     g_string_sprintf(query, "DELETE FROM %s WHERE object_id=%ld AND thread_id=%d", tables[tr->class_type][i], tr->object_id, tr->thread_ins);
90   |     sql_err=SQ_execute_query(tr->sql_connection, query->str, NULL);
91   | 
92   |     /* Normalize what has been updated/touched */
93   |     g_string_sprintf(query, "UPDATE %s SET thread_id=0 WHERE object_id=%ld AND thread_id=%d", tables[tr->class_type][i], tr->object_id, tr->thread_upd);
94   |     sql_err = SQ_execute_query(tr->sql_connection, query->str, (SQ_result_set_t **)NULL);
95   |   }
96   | 
97   | /* Process MAIN tables */
98   | /* Delete if a record was created */
99   |     g_string_sprintf(query, "DELETE FROM %s WHERE  object_id=%ld AND thread_id=%d", 
100  |                              DF_get_class_sql_table(tr->class_type), tr->object_id, tr->thread_ins);
101  |     sql_err = SQ_execute_query(tr->sql_connection, query->str, (SQ_result_set_t **)NULL);
102  |     
103  |     /* This is needed only for objects with possible dummy type, as they are updated with TR_UPDATE */
104  |     /* We use this tag when committing the update to set dummy==0 */
105  |     /* XXX may be later this should be reconsidered */
106  |     g_string_sprintf(query, "UPDATE %s SET thread_id=0 WHERE  object_id=%ld AND thread_id=%d", 
107  |                              DF_get_class_sql_table(tr->class_type), tr->object_id, tr->thread_upd);
108  |     sql_err = SQ_execute_query(tr->sql_connection, query->str, (SQ_result_set_t **)NULL);
109  | 
110  | /* Now tables  that might be affected by dummies */
111  |     for(j=0; j < tr->ndummy; j++) 
112  |     for (i=0; tables[tr->class_type][i] != NULL; i++) {
113  |     	g_string_sprintf(query, "DELETE FROM %s WHERE object_id=%ld ", tables[tr->class_type][i], tr->dummy_id[j]);
114  |     	sql_err = SQ_execute_query(tr->sql_connection, query->str, (SQ_result_set_t **)NULL);
115  |     } 
116  | 
117  |   /* if dummies have been created - get rid of them */
118  |   for(j=0; j < tr->ndummy; j++){
119  | 	 g_string_sprintf(query, "DELETE FROM last WHERE object_id=%ld ", tr->dummy_id[j]);
120  | 	 sql_err = SQ_execute_query(tr->sql_connection, query->str, (SQ_result_set_t **)NULL);
121  |   }
122  |   
123  | /* Rollback last and history tables */
124  | 
125  |     /* Delete what has been inserted */
126  |     g_string_sprintf(query, "DELETE FROM history WHERE object_id=%ld AND thread_id=%d", tr->object_id, tr->thread_ins);
127  |     sql_err=SQ_execute_query(tr->sql_connection, query->str, NULL);
128  | 
129  |     /* Normalize what has been updated/touched */
130  |     g_string_sprintf(query, "UPDATE history SET thread_id=0 WHERE object_id=%ld AND thread_id=%d", tr->object_id, tr->thread_upd);
131  |     sql_err = SQ_execute_query(tr->sql_connection, query->str, (SQ_result_set_t **)NULL);
132  | 
133  |     /* Delete what has been inserted */
134  |     g_string_sprintf(query, "DELETE FROM last WHERE object_id=%ld AND thread_id=%d", tr->object_id, tr->thread_ins);
135  |     sql_err=SQ_execute_query(tr->sql_connection, query->str, NULL);
136  | 
137  |     /* Normalize what has been updated/touched */
138  |     g_string_sprintf(query, "UPDATE last SET thread_id=0 WHERE object_id=%ld AND thread_id=%d", tr->object_id, tr->thread_upd);
139  |     sql_err = SQ_execute_query(tr->sql_connection, query->str, (SQ_result_set_t **)NULL);
140  | 
141  |   
142  |   /* Unlock all tables */
143  |   g_string_sprintf(query, "UNLOCK TABLES ");
144  |   sql_err = SQ_execute_query(tr->sql_connection, query->str, (SQ_result_set_t **)NULL);
145  | 
146  |   
147  |   g_string_free(query, TRUE);
148  |   return(0);
149  | } /* rollback() */
150  | 
151  | /************************************************************
152  | * int UD_commit_I()                                         *
153  | *                                                           *
154  | * Performs I phase of the commit - deletions                *
155  | *                                                           *
156  | * General approach is to delete untouched rec (thread_id==0)*
157  | *                                                           *
158  | ************************************************************/
159  | 
160  | int UD_commit_I(Transaction_t *tr) {
161  | GString *query;
162  | int err=0;
163  | int i;
164  | int sql_err;
165  | 
166  | 
167  |   if ((query = g_string_sized_new(STR_XXL)) == NULL){ 
168  |    ER_perror(FAC_UD, UD_MEM, "cannot allocate gstring\n");
169  |    tr->succeeded=0;
170  |    tr->error|=ERROR_U_MEM;
171  |    die; 
172  |  }
173  | 
174  | /* Commit the transaction for AUX and LEAF tables that may be affected (taken from object template) */
175  |   for (i=TAB_START; tables[tr->class_type][i] != NULL; i++) {
176  |  /* Delete old records from the tables */  
177  |     g_string_sprintf(query, "DELETE FROM %s WHERE object_id=%ld AND thread_id=0 ", tables[tr->class_type][i], tr->object_id);
178  |     sql_err = SQ_execute_query(tr->sql_connection, query->str, (SQ_result_set_t **)NULL);
179  |     /*    ER_dbg_va(FAC_UD, ASP_UD_SQL, "%s query (del old): %s\n", UD_TAG, query->str);  */
180  |   }
181  | 
182  |  /* Delete old record from the last table */  
183  |     g_string_sprintf(query, "DELETE FROM last WHERE object_id=%ld AND thread_id=0 ", tr->object_id);
184  |     sql_err = SQ_execute_query(tr->sql_connection, query->str, (SQ_result_set_t **)NULL);
185  |     /*    ER_dbg_va(FAC_UD, ASP_UD_SQL, "%s query (del old): %s\n", UD_TAG, query->str);  */
186  | 
187  |   
188  |  g_string_free(query, TRUE);
189  |  return(err); 	
190  | }
191  | 
192  | /************************************************************
193  | * int UD_commit_II()                                        *
194  | *                                                           *
195  | * Performs I phase of the commit - deletions                *
196  | * General approach is to clean up all new and updated       *
197  | * records related to the transaction                        *
198  | * (thread_id==thread_ins) and (thread_id==thread_upd)       *
199  | *                                                           *
200  | ************************************************************/
201  | int UD_commit_II(Transaction_t *tr) {
202  | GString *query;
203  | int err=0;
204  | int i,j;
205  | A_Type_t attr_type;
206  | int sql_err;
207  | 
208  |  
209  |  if ((query = g_string_sized_new(STR_XXL)) == NULL){ 
210  |    ER_perror(FAC_UD, UD_MEM, "cannot allocate gstring\n");
211  |    tr->succeeded=0;
212  |    tr->error|=ERROR_U_MEM;
213  |    die; 
214  |  }
215  | 
216  | 
217  | /* Commit the transaction for AUX and LEAF tables that may be affected (taken from object template) */
218  |   for (i=TAB_START; tables[tr->class_type][i] != NULL; i++) {
219  |  /* Set thread_id to 0 to commit the transaction */    
220  |     g_string_sprintf(query, "UPDATE %s SET thread_id=0 WHERE object_id=%ld", tables[tr->class_type][i], tr->object_id);
221  |     sql_err = SQ_execute_query(tr->sql_connection, query->str, (SQ_result_set_t **)NULL);
222  |     /*    ER_dbg_va(FAC_UD, ASP_UD_SQL, "%s query (com new): %s\n", UD_TAG, query->str); */
223  |   }
224  |   
225  | /* Commit changes to the last table */  
226  |    g_string_sprintf(query, "UPDATE last SET thread_id=0 WHERE object_id=%ld ", tr->object_id);
227  |    sql_err = SQ_execute_query(tr->sql_connection, query->str, (SQ_result_set_t **)NULL);
228  | 
229  | /* Commit changes to the history table */  
230  |    g_string_sprintf(query, "UPDATE history SET thread_id=0 WHERE object_id=%ld ", tr->object_id);
231  |    sql_err = SQ_execute_query(tr->sql_connection, query->str, (SQ_result_set_t **)NULL);
232  |    
233  | /* Commit the transaction for the MAIN tables */
234  | 
235  | /* Commit the transaction for person_role, mntner, as_set, route_set tables */
236  | /* They require different handling because of dummies */
237  | /* The rule is: Update: dummy->0, Insert: preserve dummy value */
238  | /* These tables do not require deletions since we cannot have such condition (object_id==0 AND thread_id==0) */
239  |  if((tr->class_type==C_PN) || (tr->class_type==C_RO) || 
240  |    (tr->class_type==C_AS) || (tr->class_type==C_RS) ||
241  |    (tr->class_type==C_MT)){
242  | 
243  |  /* Process the rows updated/touched */
244  |     g_string_sprintf(query, "UPDATE %s SET thread_id=0, dummy=0 WHERE object_id=%ld AND thread_id=%d ",  DF_get_class_sql_table(tr->class_type), tr->object_id, tr->thread_upd);
245  |     sql_err = SQ_execute_query(tr->sql_connection, query->str, (SQ_result_set_t **)NULL);
246  |  }
247  |  
248  |  switch (tr->class_type) {
249  |    case C_IR:
250  |    case C_IN:
251  |    case C_I6:
252  |    case C_FS: 
253  |     if((tr->save)){ /* Some special processing for tables with the second attribute */
254  |      /* Update the second field of the table with query like one below */
255  |      /* UPDATE %s SET thread_id=%d, local_as='%s' WHERE object_id=%ld */
256  |      
257  |      switch(tr->class_type) {
258  |       /* Local-as for inet-rtr */
259  |       case C_IR: attr_type=A_LA;
260  |                  break;
261  |       /* netname for inetnum and inet6num */           
262  |       case C_IN: 
263  |       case C_I6: attr_type=A_NA;
264  |                  break;
265  |       /* filter for filter-set */           
266  |       case C_FS: attr_type=A_FI;
267  |                  break;
268  |       default:
269  | 		 ER_perror(FAC_UD, UD_BUG, "not valid class type\n");
270  |                  die;
271  |                  break;           
272  |      }
273  |      g_string_sprintf(query, DF_get_update_query(attr_type), DF_get_class_sql_table(tr->class_type), 0, (char *)tr->save, tr->object_id);
274  |      sql_err = SQ_execute_query(tr->sql_connection, query->str, (SQ_result_set_t **)NULL);
275  |     }
276  |     else {
277  |      ER_perror(FAC_UD, UD_BUG, "second attribute is not saved\n");
278  |      die;
279  |     }
280  |     break;
281  |    
282  |    default:  
283  |  /* Process all other MAIN tables for updates/inserts and person_role, mntner, as_set, route_set tables for rows inserts */
284  |     g_string_sprintf(query, "UPDATE %s SET thread_id=0 WHERE object_id=%ld AND thread_id>0", DF_get_class_sql_table(tr->class_type), tr->object_id);
285  |     sql_err = SQ_execute_query(tr->sql_connection, query->str, (SQ_result_set_t **)NULL);
286  |     break;
287  |  }  
288  | 
289  | 
290  | /* for tables that might be affected by dummies */
291  |  for(j=0; j < tr->ndummy; j++)/* if dummies have been created */
292  |    for (i=0; tables[tr->class_type][i] != NULL; i++) {
293  |     g_string_sprintf(query, "UPDATE %s SET thread_id=0 WHERE object_id=%ld ", tables[tr->class_type][i], tr->dummy_id[j]);
294  |     sql_err = SQ_execute_query(tr->sql_connection, query->str, (SQ_result_set_t **)NULL);
295  |  }
296  | 
297  | 
298  |    for(j=0; j < tr->ndummy; j++){/* if dummies have been created*/
299  | 	 g_string_sprintf(query, "UPDATE last SET thread_id=0 WHERE object_id=%ld ", tr->dummy_id[j]);
300  | 	 sql_err = SQ_execute_query(tr->sql_connection, query->str, (SQ_result_set_t **)NULL);
301  |   }
302  |  
303  |  g_string_free(query, TRUE);
304  | 
305  |  return(err);		
306  | }
307  | 
308  | 
309  | /************************************************************
310  | * int UD_commit()                                           *
311  | *                                                           *
312  | * Commits the transaction                                   *
313  | *                                                           *
314  | * It locks all relevant tables and processes the 2 phases of*
315  | * commit. It also performs checkpointing of phases and      * 
316  | * radix tree update                                         * 
317  | *                                                           * 
318  | * We need to split commit into 2 because otherwise it is    *
319  | * hard to distinguish between commited records and untouched*
320  | * ones (both have thread_id==0). Splitting and checkpointing*
321  | * solves this problem                                       *
322  | *                                                           *
323  | ************************************************************/
324  | 
325  | int UD_commit(Transaction_t *tr) {
326  | GString *query;
327  | int err=0;
328  | int i;
329  | int sql_err;
330  | 
331  | if(ACT_DELETE(tr->action)) return(0);
332  | 
333  |  if ((query = g_string_sized_new(STR_XXL)) == NULL){ 
334  |    ER_perror(FAC_UD, UD_MEM, "cannot allocate gstring\n");
335  |    tr->succeeded=0;
336  |    tr->error|=ERROR_U_MEM;
337  |    die; 
338  |  }
339  | 
340  | /* Lock all relevant tables */
341  |    g_string_sprintf(query, "LOCK TABLES ");
342  |    
343  |    /* we need to lock tables for mntner and role differently, otherwise there will be duplicates (names names, etc.)*/
344  |    if((tr->class_type!=C_MT) && (tr->class_type!=C_RO)){
345  |     g_string_sprintfa(query, " %s WRITE,",  DF_get_class_sql_table(tr->class_type));
346  |     
347  |     for (i=0; tables[tr->class_type][i] != NULL; i++) 
348  |       g_string_sprintfa(query, " %s WRITE,", tables[tr->class_type][i]);
349  |    } else { /* mntner and role are special cases */
350  |       g_string_sprintfa(query, " mntner WRITE, person_role WRITE, ");
351  |    }
352  |    
353  |     for (i=TAB_START; tables[tr->class_type][i] != NULL; i++)
354  |       g_string_sprintfa(query, " %s WRITE,", tables[tr->class_type][i]);
355  |     
356  |     g_string_sprintfa(query, " last WRITE, history WRITE, transaction_rec WRITE ");
357  |     
358  |     sql_err = SQ_execute_query(tr->sql_connection, query->str, (SQ_result_set_t **)NULL);
359  | 
360  | 
361  |   /* Perform first phase - deletions */
362  |   UD_commit_I(tr);
363  |   /* checkpoint this step */
364  |   CP_COMMIT_I_PASSED(tr->action); TR_update_status(tr);
365  |   /* Perform first phase - updates */
366  |   UD_commit_II(tr);
367  |   /* checkpoint this step */
368  |   CP_COMMIT_II_PASSED(tr->action); TR_update_status(tr);
369  |   
370  |  /* Unlock all tables */
371  |  g_string_sprintf(query, "UNLOCK TABLES ");
372  |  sql_err = SQ_execute_query(tr->sql_connection, query->str, (SQ_result_set_t **)NULL);
373  | 
374  |  /* Update radix tree for route, inetnum and inaddr-arpa domain*/
375  |  err = UD_update_rx(tr, RX_OPER_CRE);
376  |  
377  |  g_string_free(query, TRUE);
378  |  return(err);
379  | } /* commit() */
380  | 
381  | /************************************************************
382  | * int UD_check_ref()                                        *
383  | *                                                           *
384  | * Checks if the object to be deleted is referenced from     *
385  | * anywhere                                                  *
386  | *                                                           *
387  | * 0 - go ahead                                              *
388  | * -1 - deletion will compromise ref.integrity               *
389  | * Result is also reflected in tr->succeeded                 *
390  | ************************************************************/
391  | int UD_check_ref(Transaction_t *tr) 
392  | {
393  | GString *query;
394  | int i;
395  | long ref_id;
396  | long num_rec;
397  | 
398  | char sobject_id[STR_M];
399  | char *sql_str;
400  | 
401  |  /* Try to allocate g_string. Return on error */	
402  |  if ((query = g_string_sized_new(STR_XXL)) == NULL){ 
403  |    ER_perror(FAC_UD, UD_MEM, "cannot allocate gstring\n");
404  |    tr->succeeded=0;
405  |    tr->error|=ERROR_U_MEM;
406  |    die; 
407  |  }
408  | 
409  | 
410  | /* Check for referential integrity of deletion */
411  | 
412  |    sprintf(sobject_id, "%ld", tr->object_id);
413  | 
414  |    switch(tr->class_type){
415  |     case C_PN:
416  |     case C_RO:
417  |         
418  |        /* Check that this person/role object is not referenced */
419  |         
420  |        for (i=0; t_ipn[i] != NULL; i++) { 
421  |         /* Calculate number of references */
422  |         sql_str= get_field_str(tr->sql_connection, "COUNT(*)", t_ipn[i], "pe_ro_id", sobject_id, NULL);
423  |         if(sql_str) {
424  |          num_rec = atol(sql_str);  free(sql_str);
425  |          ref_id=tr->object_id;
426  |          /* Check if it is a self reference (for role objects) */
427  |          if(num_rec==1) {
428  |           sql_str= get_field_str(tr->sql_connection, "object_id", t_ipn[i], "pe_ro_id", sobject_id, NULL);
429  |           if(sql_str) {
430  |            ref_id = atol(sql_str);  free(sql_str);
431  |           } else {
432  |            tr->succeeded=0; tr->error |= ERROR_U_DBS; break;
433  |           }
434  |          }
435  |          /* If there are references (and not the only self reference) we cannot delete */
436  |          if((num_rec>1) || (ref_id!=tr->object_id)) {
437  |            g_string_sprintfa(tr->error_script,"E[%d][%ld]:ref integrity: %s\n" ,ERROR_U_OBJ, num_rec, t_ipn[i]);
438  |            tr->succeeded=0; tr->error |= ERROR_U_OBJ;
439  |          }
440  |         } else {
441  |         /* SQL error occured */
442  |          tr->succeeded=0; tr->error |= ERROR_U_DBS;
443  |          g_string_sprintfa(tr->error_script,"E[%d][%s]:%s\n", ERROR_U_DBS, t_ipn[i], SQ_error(tr->sql_connection));
444  |         }
445  |        }
446  |        
447  |        /* Check that this person/role object is not referenced by name (legacy stuff) */
448  |        /* But allow overriding this check in NRTM mode and with override_integrity    */
449  |        if(IS_DUMMY_ALLOWED(tr->mode))break;
450  |         
451  |        for (i=0; t_ipn[i] != NULL; i++) { 
452  |         /* Calculate number of references */
453  |         
454  |         g_string_sprintf(query, "SELECT COUNT(*) FROM %s, person_role "
455  |                                 "WHERE person_role.object_id=%s.pe_ro_id "
456  |                                 "AND person_role.nic_hdl='%s' ", t_ipn[i], t_ipn[i], tr->save);
457  |         
458  |         sql_str= get_qresult_str(tr->sql_connection, query->str);
459  |         if(sql_str) {
460  |          num_rec = atol(sql_str);  free(sql_str);
461  |          /* If there are references (no self reference is possible in this case) we cannot delete */
462  |          if(num_rec>0) {
463  |            g_string_sprintfa(tr->error_script,"E[%d][%ld]:ref integrity: %s\n" ,ERROR_U_OBJ, num_rec, t_ipn[i]);
464  |            tr->succeeded=0; tr->error |= ERROR_U_OBJ;
465  |          }
466  |         } else {
467  |         /* SQL error occured */
468  |          tr->succeeded=0; tr->error |= ERROR_U_DBS;
469  |          g_string_sprintfa(tr->error_script,"E[%d][%s]:%s\n", ERROR_U_DBS, t_ipn[i], SQ_error(tr->sql_connection));
470  |         }
471  |        }
472  |           
473  |        break;
474  |         
475  |     case C_MT:
476  |     
477  |         /* Check that this mntner object is not referenced */
478  |         
479  |        for (i=0; t_imt[i] != NULL; i++) { 
480  |        /* Calculate number of references */
481  |         sql_str= get_field_str(tr->sql_connection, "COUNT(*)", t_imt[i], "mnt_id", sobject_id, NULL);
482  |         if(sql_str) {
483  |          num_rec = atol(sql_str);  free(sql_str);
484  |          ref_id=tr->object_id;
485  |          /* Check if it is a self reference  */
486  |          if(num_rec==1) { 
487  |             sql_str= get_field_str(tr->sql_connection, "object_id", t_imt[i], "mnt_id", sobject_id, NULL);
488  |             if(sql_str) {
489  |               ref_id = atol(sql_str);  free(sql_str);
490  |             } else {
491  |               tr->succeeded=0; tr->error |= ERROR_U_DBS; break;
492  |             } 
493  |          }
494  |          /* If there are references (and not the only self reference) we cannot delete */ 
495  |          if((num_rec>1) || (ref_id!=tr->object_id)) {
496  |            g_string_sprintfa(tr->error_script,"E[%d][%ld]:ref integrity: %s\n" ,ERROR_U_OBJ, num_rec, t_imt[i]);
497  |            tr->succeeded=0; tr->error |= ERROR_U_OBJ;
498  |          }
499  |         } else {
500  |          tr->succeeded=0; tr->error |= ERROR_U_DBS;
501  |         }
502  |        }   
503  |        break;
504  |         
505  |     case C_RS:
506  |     case C_AS:
507  |         /* Check that this set object is not referenced */
508  |         /* Calculate number of references */
509  |         sql_str= get_field_str(tr->sql_connection, "COUNT(*)", "member_of", "set_id", sobject_id, NULL);
510  |         if(sql_str) {
511  |          num_rec = atol(sql_str);  free(sql_str);
512  |          /* XXX though set may contain other sets as memebers, */
513  |          /* there is no member-of attribute in these objects. */
514  |          /* So no self-reference is possible */
515  |          if(num_rec!=0) {
516  |            g_string_sprintfa(tr->error_script,"I[%d][%ld]:ref integrity: %s\n" ,ERROR_U_OBJ, num_rec, "member_of");
517  | 	  /* XXX Do not refuse the transaction but change the object to dummy */
518  |            tr->action |=TA_DUMMY;
519  |          }
520  |         } else {
521  |          tr->succeeded=0; tr->error |= ERROR_U_DBS;
522  |         }
523  |         break;
524  | 
525  |     default:
526  |         break;    
527  |    } 
528  |    
529  |  g_string_free(query, TRUE);
530  | 
531  |  /* Check if we have passed referential integrity check */  
532  |  if(tr->succeeded) return(0); else return(-1);
533  |  
534  | } 
535  | 	
536  | /************************************************************
537  | * int UD_delete()                                              *
538  | *                                                           *
539  | * Deletes the object                                        *
540  | *                                                           *
541  | * It deletes the object from all relevant tables. 
542  | * Then it updates the radix tree for routes, inetnums 
543  | * and rev.domains           *
544  | *                                                           *
545  | ************************************************************/
546  | int UD_delete(Transaction_t *tr) 
547  | {
548  | GString *query;
549  | int err=0;
550  | int i;
551  | long timestamp;
552  | int sql_err;
553  | int ref_set;
554  | 
555  | /* if we are deliting referenced set, we need to  perform delete a bit differently */
556  | /* no deletions of aux tables */
557  | /* dummy main, instead of del */
558  | /* dummy last instead of empty */
559  | /* So let's determine if we are deliting referenced set */
560  | if ((tr->class_type==C_AS || tr->class_type==C_RS) && ACT_UPD_DUMMY(tr->action)) ref_set = 1; else ref_set = 0;
561  | 
562  |  /* Try to allocate g_string. Return on error */	
563  |  if ((query = g_string_sized_new(STR_XXL)) == NULL){ 
564  |    ER_perror(FAC_UD, UD_MEM, "cannot allocate gstring\n");
565  |    tr->succeeded=0;
566  |    tr->error|=ERROR_U_MEM;
567  |    die; 
568  |  }
569  | 
570  |   
571  | /* Lock all relevant tables */
572  |    g_string_sprintf(query, "LOCK TABLES ");
573  |    
574  |    /* we need to lock tables for mntner and role differently, otherwise there will be duplicates (names names, etc.)*/
575  |    if((tr->class_type!=C_MT) && (tr->class_type!=C_RO)){
576  |     g_string_sprintfa(query, " %s WRITE,",  DF_get_class_sql_table(tr->class_type));
577  |     
578  |     for (i=0; tables[tr->class_type][i] != NULL; i++) 
579  |       g_string_sprintfa(query, " %s WRITE,", tables[tr->class_type][i]);
580  |    } else { /* mntner and role are special cases */
581  |       g_string_sprintfa(query, " mntner WRITE, person_role WRITE, ");
582  |    }
583  |    
584  |     for (i=TAB_START; tables[tr->class_type][i] != NULL; i++)
585  |       g_string_sprintfa(query, " %s WRITE,", tables[tr->class_type][i]);
586  |     
587  |     g_string_sprintfa(query, " last WRITE, history WRITE ");
588  |     
589  |     sql_err = SQ_execute_query(tr->sql_connection, query->str, (SQ_result_set_t **)NULL);
590  |     if (sql_err) {
591  | 	 ER_perror(FAC_UD, UD_SQL, "%s[%s]\n", SQ_error(tr->sql_connection), query->str);
592  |          tr->succeeded=0;
593  |          tr->error |=ERROR_U_DBS;
594  | 	 die;
595  |     }
596  | /* Update the history table */
597  | /* XXX Crash recovery: */
598  | /* If history was not updated - we will create a record */
599  | /* If history was already updated but last wasn't - we will just replace the record */
600  | /* If history and last were already updated - we will have an empty query - 0 rows should be affected */
601  |     g_string_sprintf(query,     "REPLACE history "
602  | 				"SELECT 0, object_id, sequence_id, timestamp, object_type, object, pkey, serial, prev_serial "
603  |        				"FROM last "
604  |        				"WHERE object_id=%ld AND sequence_id=%ld ", tr->object_id, tr->sequence_id);
605  |     sql_err = SQ_execute_query(tr->sql_connection, query->str, (SQ_result_set_t **)NULL);
606  |     if (sql_err) {
607  | 	 ER_perror(FAC_UD, UD_SQL, "%s[%s]\n", SQ_error(tr->sql_connection), query->str);
608  |          tr->succeeded=0;
609  |          tr->error |=ERROR_U_DBS;
610  | 	 die;
611  |     }
612  | 
613  | /* Delete records from the leaf and aux tables */
614  |     for (i=TAB_START; tables[tr->class_type][i] != NULL; i++) {
615  |      g_string_sprintf(query, "DELETE FROM %s WHERE object_id=%ld ", tables[tr->class_type][i], tr->object_id);
616  |      sql_err = SQ_execute_query(tr->sql_connection, query->str, (SQ_result_set_t **)NULL);
617  |     /*    ER_dbg_va(FAC_UD, ASP_UD_SQL, "%s query (delete): %s\n", UD_TAG, query->str);*/
618  |        if (sql_err) {
619  | 	 ER_perror(FAC_UD, UD_SQL, "%s[%s]\n", SQ_error(tr->sql_connection), query->str);
620  |          tr->succeeded=0;
621  |          tr->error |=ERROR_U_DBS;
622  | 	 die;
623  |        }
624  |     }  
625  |      
626  | 
627  |  /* For all object except as-sets and route-sets we need to empty MAIN table */
628  |  /* For referenced sets, however, we transform them to dummy, not delete */
629  |  if (ref_set == 0) {
630  | 
631  | /* Process the MAIN table  */
632  |     g_string_sprintf(query, "DELETE FROM %s WHERE object_id=%ld ", DF_get_class_sql_table(tr->class_type), tr->object_id);
633  |    
634  | 
635  |     sql_err = SQ_execute_query(tr->sql_connection, query->str, (SQ_result_set_t **)NULL);
636  |     if (sql_err) {
637  | 	 ER_perror(FAC_UD, UD_SQL, "%s[%s]\n", SQ_error(tr->sql_connection), query->str);
638  |          tr->succeeded=0;
639  |          tr->error |=ERROR_U_DBS;
640  | 	 die;
641  |     }
642  |  
643  |  } else { /* this is the referenced set */
644  |  /* we need to 'dummy' MAIN */
645  |     g_string_sprintf(query, "UPDATE %s SET dummy=1 WHERE object_id=%ld ", DF_get_class_sql_table(tr->class_type), tr->object_id);
646  |                
647  |     sql_err = SQ_execute_query(tr->sql_connection, query->str, (SQ_result_set_t **)NULL);
648  |     if (sql_err) {
649  |          ER_perror(FAC_UD, UD_SQL, "%s[%s]\n", SQ_error(tr->sql_connection), query->str);
650  |          tr->succeeded=0;
651  |          tr->error |= ERROR_U_DBS;
652  |          die;
653  |     }
654  |  }
655  |        
656  |   /* insert new version into the last */
657  |   timestamp=time(NULL);
658  |   
659  |  if(ref_set == 0) 
660  |  {
661  |  /* empty the contents, but leave in the table to restrict re-use of object_id */ 
662  |  /* XXX change sequence_id=0 so it is easy to say that the object was deleted */
663  |   g_string_sprintf(query, "UPDATE last SET object='', timestamp=%ld, sequence_id=0  WHERE object_id=%ld ", timestamp, tr->object_id);
664  | 
665  |   sql_err = SQ_execute_query(tr->sql_connection, query->str, (SQ_result_set_t **)NULL);
666  |   if (sql_err) {
667  | 	 ER_perror(FAC_UD, UD_SQL, "%s[%s]\n", SQ_error(tr->sql_connection), query->str);
668  |          tr->succeeded=0;
669  |          tr->error |= ERROR_U_DBS;
670  | 	 die;
671  |   }
672  |  } else {/* this is the referenced set */
673  |  /* 'dummy' the contents, but leave in the table to prevent re-use of object_id */ 
674  |  g_string_sprintf(query, "UPDATE last SET object='DUMMY SET', object_type=%d, sequence_id=%ld, timestamp=%ld  WHERE object_id=%ld ", DUMMY_TYPE, tr->sequence_id+1, timestamp, tr->object_id);
675  | 
676  |  sql_err = SQ_execute_query(tr->sql_connection, query->str, (SQ_result_set_t **)NULL);
677  |  if (sql_err) {
678  |      ER_perror(FAC_UD, UD_SQL, "%s[%s]\n", SQ_error(tr->sql_connection), query->str);
679  |      tr->succeeded=0;
680  |      tr->error |= ERROR_U_DBS;
681  |     die;
682  |    }
683  |  }
684  | 
685  | 
686  |  /* Unlock all tables */
687  |   g_string_sprintf(query, "UNLOCK TABLES ");
688  |   sql_err = SQ_execute_query(tr->sql_connection, query->str, (SQ_result_set_t **)NULL);
689  |   if (sql_err) {
690  | 	ER_perror(FAC_UD, UD_SQL, "%s[%s]\n", SQ_error(tr->sql_connection), query->str);
691  |         tr->succeeded=0;
692  |         tr->error |= ERROR_U_DBS;
693  | 	die;
694  |   }
695  | 
696  | 
697  |   g_string_free(query, TRUE);
698  | 
699  |   return(err);
700  | 
701  | } /* delete() */ 
702  | 
703  | 
704  | 
705  |      	       /* Do more in the forest
706  |    * Update radix tree for route and inetnum
707  |    */
708  | 
709  | int UD_update_rx(Transaction_t *tr, rx_oper_mt mode)
710  | {
711  | rp_upd_pack_t *packptr = tr->packptr;
712  | int err=0;
713  | 
714  |   
715  |   if(!IS_STANDALONE(tr->mode)) { /* only if server */
716  |   
717  | 
718  |     /* Only for these types of objects and only if we have collected data (tr->save != NULL) */
719  |     if( (   (tr->class_type==C_RT) 
720  | 	 || (tr->class_type==C_IN) 
721  | 	 || (tr->class_type==C_I6)
722  | 	 || (tr->class_type==C_DN))) {
723  |       /* Collect some data for radix tree and NH repository update for deletes*/
724  |       if(mode == RX_OPER_DEL)g_slist_foreach((tr->object)->attributes, get_rx_data, tr);
725  |       
726  |       /* Except for regular domains we need to update radix tree */
727  |       if(ACT_UPD_RX(tr->action)){
728  |        packptr->key = tr->object_id;
729  |        if( RP_pack_node(mode, packptr, tr->source_hdl) == RX_OK ) {
730  | 	err = 0;
731  |        } else {
732  | 	err = (-1);
733  | 	ER_perror(FAC_UD, UD_BUG, "cannot update radix tree\n");
734  | 	die;
735  |        }
736  |       } /* update radix tree */
737  |     }
738  |   }
739  |   return(err);
740  | }
741  |    
742  | 	       
743  |