1: /*
2: * *
3: * * *
4: * * *
5: * ***************
6: * * * * *
7: * * MUMPS *
8: * * * * *
9: * ***************
10: * * *
11: * * *
12: * *
13: *
14: * tp_check.c
15: * TP database checkpointing code
16: *
17: *
18: * Author: Serena Willis <jpw@coherent-logic.com>
19: * Copyright (C) 1998 MUG Deutschland
20: * Copyright (C) 2022 Coherent Logic Development LLC
21: *
22: *
23: * This file is part of FreeM.
24: *
25: * FreeM is free software: you can redistribute it and/or modify
26: * it under the terms of the GNU Affero Public License as published by
27: * the Free Software Foundation, either version 3 of the License, or
28: * (at your option) any later version.
29: *
30: * FreeM is distributed in the hope that it will be useful,
31: * but WITHOUT ANY WARRANTY; without even the implied warranty of
32: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
33: * GNU Affero Public License for more details.
34: *
35: * You should have received a copy of the GNU Affero Public License
36: * along with FreeM. If not, see <https://www.gnu.org/licenses/>.
37: *
38: **/
39:
40: #include <stdlib.h>
41: #include <string.h>
42: #include <unistd.h>
43: #include "tp_check.h"
44: #include "mpsdef.h"
45: #include "transact.h"
46: #include "journal.h"
47: #include "fs.h"
48:
49: short frm_global_exists(char *, char *, char *);
50:
51: cptab *cptab_head[TP_MAX_NEST];
52:
53: cptab *cptab_insert(int tlevel, char *global)
54: {
55: cptab *t;
56: char mode;
57:
58: short g_exists;
59:
60: char *gc_ns;
61: char *gc_pth;
62:
63: gc_ns = (char *) malloc (STRLEN * sizeof (char));
64: NULLPTRCHK(gc_ns,"cptab_insert");
65:
66: gc_pth = (char *) malloc (STRLEN * sizeof (char));
67: NULLPTRCHK(gc_pth,"cptab_insert");
68:
69: for (t = cptab_head[tlevel]; t != NULL; t = t->next) {
70:
71: if ((strcmp (t->global, global) == 0) && (t->mode > CP_UNUSED)) {
72: /* found match */
73: return t;
74: }
75:
76: }
77:
78: /* insert */
79: t = (cptab *) malloc (sizeof (cptab));
80: NULLPTRCHK(t,"cptab_insert");
81:
82: t->global = (char *) malloc (sizeof (char) * (strlen (global) + 1));
83: NULLPTRCHK(t->global,"cptab_insert");
84:
85: strcpy (t->global, global);
86:
87: g_exists = frm_global_exists (gc_ns, gc_pth, global);
88:
89: t->file = (char *) malloc (sizeof (char) * (strlen (gc_pth)));
90: NULLPTRCHK(t->file,"cptab_insert");
91:
92: t->cp_file = (char *) malloc (sizeof (char) * STRLEN);
93: NULLPTRCHK(t->cp_file,"cptab_insert");
94:
95: strcpy (t->file, gc_pth);
96: stcnv_m2c (t->file);
97:
98: snprintf (t->cp_file, STRLEN - 1, "%s.%d.%d.chk", t->file, pid, tp_level);
99:
100: free (gc_ns);
101: free (gc_pth);
102:
103: if (!g_exists) {
104: t->mode = CP_REMOVE;
105: }
106: else {
107: t->mode = CP_RESTORE;
108: }
109:
110: t->next = cptab_head[tlevel];
111: cptab_head[tlevel] = t;
112:
113: return t;
114: }
115:
116: short cptab_precommit(int tlevel)
117: {
118: cptab *t;
119: /*char *cmd;*/
120: char *pctmp;
121: int rc;
122:
123: /*
124: cmd = (char *) malloc (STRLEN * sizeof (char));
125: NULLPTRCHK(cmd,"cptab_precommit");
126: */
127:
128: pctmp = (char *) malloc (STRLEN * sizeof (char));
129: NULLPTRCHK(pctmp,"cptab_precommit");
130:
131: for (t = cptab_head[tlevel]; t != NULL; t = t->next) {
132:
133: if (t->mode == CP_RESTORE) {
134:
135: /*
136: snprintf (cmd, STRLEN - 1, "/bin/cp %s %s", t->file, t->cp_file);
137: rc = system (cmd);
138: */
139:
140: rc = cp (t->cp_file, t->file);
141:
142: if (rc != 0) {
143:
144: strcpy (pctmp, t->file);
145: stcnv_c2m (pctmp);
146:
147: jnl_ent_write (JNLA_CHECKPOINT_FAIL, " \201", pctmp);
148:
149: /*free (cmd);*/
150: free (pctmp);
151:
152: return FALSE;
153:
154: }
155: else {
156:
157: strcpy (pctmp, t->file);
158: stcnv_c2m (pctmp);
159:
160: jnl_ent_write (JNLA_CHECKPOINT_OK, " \201", pctmp);
161:
162: }
163:
164: }
165:
166: }
167:
168: /*free (cmd);*/
169: free (pctmp);
170:
171: return TRUE;
172: }
173:
174: void cptab_postcommit(int tlevel)
175: {
176: cptab *t;
177: /*char *cmd;*/
178: int rc;
179:
180: /*
181: cmd = (char *) malloc (STRLEN * sizeof (char));
182: NULLPTRCHK(cmd,"cptab_postcommit");
183: */
184:
185: for (t = cptab_head[tlevel]; t != NULL; t = t->next) {
186:
187: if (t->mode == CP_RESTORE) {
188: /*
189: snprintf (cmd, STRLEN - 1, "/bin/rm -f '%s'", t->cp_file);
190: rc = system (cmd);
191: */
192: unlink (t->cp_file);
193: }
194:
195: }
196:
197: cptab_head[tlevel] = NULL;
198: }
199:
200: short cptab_rollback(int tlevel)
201: {
202: cptab *t;
203: /*char *cmd;*/
204: int rc;
205:
206: /*
207: cmd = (char *) malloc (STRLEN * sizeof (char));
208: NULLPTRCHK(cmd,"cptab_rollback");
209: */
210:
211: for (t = cptab_head[tlevel]; t != NULL; t = t->next) {
212:
213: switch (t->mode) {
214:
215: case CP_REMOVE:
216: unlink (t->file);
217: /*
218: snprintf (cmd, STRLEN - 1, "/bin/rm -f '%s'", t->file);
219: rc = system (cmd);
220: */
221: break;
222:
223: case CP_RESTORE:
224: /*
225: snprintf (cmd, STRLEN - 1, "/bin/cp '%s' '%s'", t->cp_file, t->file);
226: rc = system (cmd);
227: */
228: rc = cp (t->file, t->cp_file);
229:
230: if (rc != 0) {
231: cptab_head[tlevel] = NULL;
232: /*free (cmd);*/
233: return FALSE;
234: }
235:
236: /*
237: snprintf (cmd, STRLEN - 1, "/bin/rm -f %s", t->cp_file);
238: rc = system (cmd);
239: */
240:
241: unlink (t->cp_file);
242: if (rc != 0) {
243: cptab_head[tlevel] = NULL;
244: /*free (cmd);*/
245: return FALSE;
246: }
247:
248: break;
249:
250:
251: }
252:
253: }
254:
255: cptab_head[tlevel] = NULL;
256:
257: return TRUE;
258:
259: }
260:
261: void cptab_dump(int tlevel)
262: {
263: cptab *gt;
264: char cp_mode[15];
265:
266: printf ("\n Global database checkpoints:\n");
267:
268: printf ("\n %-30s%-20s%s\n", "GLOBAL", "MODE", "FILES");
269: printf (" %-30s%-20s%s\n", "------", "----", "-----");
270:
271: for (gt = cptab_head[tlevel]; gt != NULL; gt = gt->next) {
272:
273: switch (gt->mode) {
274:
275: case CP_UNUSED:
276: strcpy (cp_mode, "CP_UNUSED");
277: break;
278:
279: case CP_REMOVE:
280: strcpy (cp_mode, "CP_REMOVE");
281: break;
282:
283: case CP_RESTORE:
284: strcpy (cp_mode, "CP_RESTORE");
285: break;
286:
287: }
288:
289: if (gt->mode > CP_UNUSED) {
290: printf (" %-30s%-20sIN: %s\n", gt->global, cp_mode, gt->file);
291: }
292: else {
293: printf (" N/A\n");
294: }
295:
296: if (gt->mode == CP_RESTORE) {
297: printf (" %-30s%-20sOUT: %s\n", "", "", gt->cp_file);
298: }
299:
300: }
301: }
302:
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