ctdb/ltdbtool: Fix static declarations
[samba.git] / ctdb / tools / ltdbtool.c
1 /*
2  * ctdb local tdb tool
3  *
4  * Copyright (C) Gregor Beck 2011
5  * Copyright (C) Michael Adam 2011
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; either version 3 of the License, or
10  * (at your option) any later version.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
19  */
20
21 #include "replace.h"
22 #include "system/filesys.h"
23 #include "system/network.h"
24 #include "system/locale.h"
25
26 #include <tdb.h>
27
28 #include "protocol/protocol.h"
29
30 enum {
31         MAX_HEADER_SIZE=24,
32         OUT_MODE = S_IRUSR | S_IWUSR,
33         OUT_FLAGS = O_EXCL|O_CREAT|O_RDWR,
34 };
35
36 union  ltdb_header {
37         struct ctdb_ltdb_header hdr;
38         uint32_t uints[MAX_HEADER_SIZE/4];
39 };
40
41 static const union ltdb_header DEFAULT_HDR = {
42         .hdr.dmaster = -1,
43 };
44
45 static int help(const char* cmd)
46 {
47         fprintf(stdout, ""
48 "Usage: %s [options] <command>\n"
49 "\n"
50 "Options:\n"
51 "   -s {0|32|64}    specify how to determine the ctdb record header size\n"
52 "                   for the input database:\n"
53 "                   0: no ctdb header\n"
54 "                   32: ctdb header size of a 32 bit system (20 bytes)\n"
55 "                   64: ctdb header size of a 64 bit system (24 bytes)\n"
56 "                   default: 32 or 64 depending on the system architecture\n"
57 "\n"
58 "   -S <num>        the number of bytes to interpret as ctdb record header\n"
59 "                   for the input database (beware!)\n"
60 "\n"
61 "   -o {0|32|64}    specify how to determine the ctdb record header size\n"
62 "                   for the output database\n"
63 "                   0: no ctdb header\n"
64 "                   32: ctdb header size of a 32 bit system (20 bytes)\n"
65 "                   64: ctdb header size of a 64 bit system (24 bytes)\n"
66 "                   default: 32 or 64 depending on the system architecture\n"
67 "\n"
68 "   -O <num>        the number of bytes to interpret as ctdb record header\n"
69 "                   for the output database (beware!)\n"
70 "\n"
71 "   -e              Include empty records, defaults to off\n"
72 "\n"
73 "   -p              print header (for the dump command), defaults to off\n"
74 "\n"
75 "   -h              print this help\n"
76 "\n"
77 "Commands:\n"
78 "  help                         print this help\n"
79 "  dump <db>                    dump the db to stdout\n"
80 "  convert <in_db> <out_db>     convert the db\n\n", cmd);
81         return 0;
82 }
83
84 static int usage(const char* cmd)
85 {
86         fprintf(stderr,
87                 "Usage: %s dump [-e] [-p] [-s{0|32|64}] <idb>\n"
88                 "       %s convert [-e] [-s{0|32|64}] [-o{0|32|64}] <idb> <odb>\n"
89                 "       %s {help|-h}\n"
90                 , cmd, cmd, cmd);
91         return -1;
92 }
93
94 static int
95 ltdb_traverse(TDB_CONTEXT *tdb, int (*fn)(TDB_CONTEXT*, TDB_DATA, TDB_DATA,
96                                           struct ctdb_ltdb_header*, void *),
97               void *state, int hsize, bool skip_empty);
98
99 struct write_record_ctx {
100         TDB_CONTEXT* tdb;
101         size_t hsize;
102         int tdb_store_flags;
103 };
104
105 static int
106 write_record(TDB_CONTEXT* tdb, TDB_DATA key, TDB_DATA val,
107              struct ctdb_ltdb_header* hdr,
108              void* write_record_ctx);
109
110
111 struct dump_record_ctx {
112         FILE* file;
113         void (*print_data)(FILE*, TDB_DATA);
114         void (*dump_header)(struct dump_record_ctx*, struct ctdb_ltdb_header*);
115 };
116
117 static int dump_record(TDB_CONTEXT* tdb, TDB_DATA key, TDB_DATA val,
118                        struct ctdb_ltdb_header* hdr,
119                        void* dump_record_ctx);
120 static void print_data_tdbdump(FILE* file, TDB_DATA data);
121 static void dump_header_full(struct dump_record_ctx*, struct ctdb_ltdb_header*);
122 static void dump_header_nop(struct dump_record_ctx* c,
123                             struct ctdb_ltdb_header* h)
124 {}
125
126 static int dump_db(const char* iname, FILE* ofile, int hsize, bool dump_header,
127                    bool empty)
128 {
129         int ret = -1;
130         TDB_CONTEXT* idb = tdb_open(iname, 0, TDB_DEFAULT, O_RDONLY, 0);
131         if (!idb) {
132                 perror("tdbopen in");
133         } else {
134                 struct dump_record_ctx dump_ctx = {
135                         .file = ofile,
136                         .print_data =  &print_data_tdbdump,
137                         .dump_header = dump_header ? &dump_header_full
138                                                    : &dump_header_nop,
139                 };
140                 ret = ltdb_traverse(idb, &dump_record, &dump_ctx, hsize, !empty);
141                 tdb_close(idb);
142         }
143         return ret;
144 }
145
146 static int conv_db(const char* iname, const char* oname, size_t isize,
147                    size_t osize, bool keep_empty)
148 {
149         int ret = -1;
150         TDB_CONTEXT* idb = tdb_open(iname, 0, TDB_DEFAULT, O_RDONLY, 0);
151         if (!idb) {
152                 perror("tdbopen in");
153         } else {
154                 TDB_CONTEXT* odb = tdb_open(oname, 0, TDB_DEFAULT, OUT_FLAGS, OUT_MODE);
155                 if (!odb) {
156                         perror("tdbopen out");
157                 } else {
158                         struct write_record_ctx ctx = {
159                                 .tdb = odb,
160                                 .hsize = osize,
161                                 .tdb_store_flags = TDB_REPLACE,
162                         };
163                         ret = ltdb_traverse(idb, &write_record, &ctx, isize, !keep_empty);
164                         tdb_close(odb);
165                 }
166                 tdb_close(idb);
167         }
168         return ret;
169 }
170
171 static bool parse_size(size_t* size, const char* arg, bool raw) {
172         long val;
173         errno = 0;
174         val = strtol(arg, (char **) NULL, 10);
175         if (errno != 0) {
176                 return false;
177         }
178         if (!raw) {
179                 switch(val) {
180                 case 0:
181                         break;
182                 case 32:
183                         val = 20;
184                         break;
185                 case 64:
186                         val = 24;
187                         break;
188                 default:
189                         return false;
190                 }
191         }
192         *size = MIN(val, MAX_HEADER_SIZE);
193         return true;
194 }
195
196
197 int main(int argc, char* argv[])
198 {
199         size_t isize = sizeof(struct ctdb_ltdb_header);
200         size_t osize = sizeof(struct ctdb_ltdb_header);
201         bool print_header = false;
202         bool keep_empty = false;
203         int opt;
204         const char *cmd, *idb, *odb;
205
206         while ((opt = getopt(argc, argv, "s:o:S:O:phe")) != -1) {
207                 switch (opt) {
208                 case 's':
209                 case 'S':
210                         if (!parse_size(&isize, optarg, isupper(opt))) {
211                                 return usage(argv[0]);
212                         }
213                         break;
214                 case 'o':
215                 case 'O':
216                         if (!parse_size(&osize, optarg, isupper(opt))) {
217                                 return usage(argv[0]);
218                         }
219                         break;
220                 case 'p':
221                         print_header = true;
222                         break;
223                 case 'e':
224                         keep_empty = true;
225                         break;
226                 case 'h':
227                         return help(argv[0]);
228                 default:
229                         return usage(argv[0]);
230                 }
231         }
232
233         if (argc - optind < 1) {
234                 return usage(argv[0]);
235         }
236
237         cmd = argv[optind];
238
239         if (strcmp(cmd, "help") == 0) {
240                 return help(argv[0]);
241         }
242         else if (strcmp(cmd, "dump") == 0) {
243                 int ret;
244                 if (argc - optind != 2) {
245                         return usage(argv[0]);
246                 }
247                 idb = argv[optind+1];
248                 ret = dump_db(idb, stdout, isize, print_header, keep_empty);
249                 return (ret >= 0) ? 0 : ret;
250         }
251         else if (strcmp(cmd, "convert") == 0) {
252                 int ret;
253                 if (argc - optind != 3) {
254                         return usage(argv[0]);
255                 }
256                 idb = argv[optind+1];
257                 odb = argv[optind+2];
258                 ret = conv_db(idb, odb, isize, osize, keep_empty);
259                 return (ret >= 0) ? 0 : ret;
260         }
261
262         return usage(argv[0]);
263 }
264
265 struct ltdb_traverse_ctx {
266         int (*fn)(TDB_CONTEXT*,TDB_DATA,TDB_DATA,struct ctdb_ltdb_header*,void *);
267         void* state;
268         size_t hsize;
269         bool skip_empty;
270         unsigned nempty;
271 };
272
273 static int
274 ltdb_traverse_fn(TDB_CONTEXT* tdb, TDB_DATA key, TDB_DATA val,
275                  void* ltdb_traverse_ctx)
276 {
277         struct ltdb_traverse_ctx* ctx =
278                 (struct ltdb_traverse_ctx*)ltdb_traverse_ctx;
279         union ltdb_header hdr = DEFAULT_HDR;
280
281         const size_t hsize = MIN(sizeof(hdr), ctx->hsize);
282         if (val.dsize < hsize) {
283                 fprintf(stderr, "Value too short to contain a ctdb header: ");
284                 print_data_tdbdump(stderr, key);
285                 fprintf(stderr, " = ");
286                 print_data_tdbdump(stderr, val);
287                 fputc('\n', stderr);
288                 return -1;
289         }
290         if (val.dsize == hsize && ctx->skip_empty) {
291                 ctx->nempty++;
292                 return 0;
293         }
294
295         memcpy(&hdr, val.dptr, hsize);
296
297         if (hdr.uints[5] != 0) {
298                 fprintf(stderr, "Warning: header padding isn't zero! Wrong header size?\n");
299         }
300         val.dptr += ctx->hsize;
301         val.dsize -= ctx->hsize;
302         return ctx->fn(tdb, key, val, &hdr.hdr, ctx->state);
303 }
304
305 static int ltdb_traverse(TDB_CONTEXT *tdb,
306                          int (*fn)(TDB_CONTEXT*, TDB_DATA, TDB_DATA,
307                                    struct ctdb_ltdb_header*, void *),
308                          void *state, int hsize, bool skip_empty)
309 {
310         struct ltdb_traverse_ctx ctx = {
311                 .fn = fn,
312                 .state = state,
313                 .hsize = hsize < 0 ? sizeof(struct ctdb_ltdb_header) : hsize,
314                 .skip_empty = skip_empty,
315                 .nempty = 0,
316         };
317         int ret = tdb_traverse(tdb, &ltdb_traverse_fn, &ctx);
318
319         return (ret < 0) ? ret : (ret - ctx.nempty);
320 }
321
322 static int write_record(TDB_CONTEXT* tdb, TDB_DATA key, TDB_DATA val,
323                         struct ctdb_ltdb_header* hdr,
324                         void* write_record_ctx)
325 {
326         struct write_record_ctx* ctx
327                 = (struct write_record_ctx*)write_record_ctx;
328
329         if (ctx->hsize == 0) {
330                 if (tdb_store(ctx->tdb, key, val, ctx->tdb_store_flags) == -1) {
331                         fprintf(stderr, "tdb_store: %s\n", tdb_errorstr(ctx->tdb));
332                         return -1;
333                 }
334         } else {
335                 TDB_DATA h = {
336                         .dptr = (void*)hdr,
337                         .dsize = ctx->hsize,
338                 };
339                 if(tdb_store(ctx->tdb, key, h, ctx->tdb_store_flags) == -1) {
340                         fprintf(stderr, "tdb_store: %s\n", tdb_errorstr(ctx->tdb));
341                         return -1;
342                 }
343                 if(tdb_append(ctx->tdb, key, val) == -1) {
344                         fprintf(stderr, "tdb_append: %s\n", tdb_errorstr(ctx->tdb));
345                         return -1;
346                 }
347         }
348         return 0;
349 }
350
351 static int dump_record(TDB_CONTEXT* tdb, TDB_DATA key, TDB_DATA val,
352                        struct ctdb_ltdb_header* hdr,
353                        void* dump_record_ctx)
354 {
355         struct dump_record_ctx* ctx = (struct dump_record_ctx*)dump_record_ctx;
356
357         fprintf(ctx->file, "{\nkey(%d) = ", (int)key.dsize);
358         ctx->print_data(ctx->file, key);
359         fputc('\n', ctx->file);
360         ctx->dump_header(ctx, hdr);
361         fprintf(ctx->file, "data(%d) = ", (int)val.dsize);
362         ctx->print_data(ctx->file, val);
363         fprintf(ctx->file, "\n}\n");
364         return 0;
365 }
366
367 static void dump_header_full(struct dump_record_ctx* c,
368                              struct ctdb_ltdb_header* h)
369 {
370         fprintf(c->file, "dmaster: %d\nrsn: %llu\nflags: 0x%X\n",
371                 (int)h->dmaster,
372                 (unsigned long long)h->rsn, h->flags);
373 }
374
375 static void print_data_tdbdump(FILE* file, TDB_DATA data)
376 {
377         unsigned char *ptr = data.dptr;
378         fputc('"', file);
379         while (data.dsize--) {
380                 if (isprint(*ptr) && !strchr("\"\\", *ptr)) {
381                         fputc(*ptr, file);
382                 } else {
383                         fprintf(file, "\\%02X", *ptr);
384                 }
385                 ptr++;
386         }
387         fputc('"',file);
388 }
389