This source file includes following definitions.
- new_string_cb
- original_string_cb
- patch_cb
- print_patch
- apply_patch
- log_patch_cib_versions
- strip_patch_cib_version
- generate_patch
- build_arg_context
- main
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10 #include <crm_internal.h>
11
12 #include <stdio.h>
13 #include <unistd.h>
14 #include <stdlib.h>
15 #include <errno.h>
16 #include <fcntl.h>
17 #include <sys/param.h>
18 #include <sys/types.h>
19
20 #include <crm/crm.h>
21 #include <crm/msg_xml.h>
22 #include <crm/common/cmdline_internal.h>
23 #include <crm/common/output_internal.h>
24 #include <crm/common/xml.h>
25 #include <crm/common/ipc.h>
26 #include <crm/cib.h>
27
28 #define SUMMARY "Compare two Pacemaker configurations (in XML format) to produce a custom diff-like output, " \
29 "or apply such an output as a patch"
30
31 struct {
32 gboolean apply;
33 gboolean as_cib;
34 gboolean no_version;
35 gboolean raw_1;
36 gboolean raw_2;
37 gboolean use_stdin;
38 char *xml_file_1;
39 char *xml_file_2;
40 } options;
41
42 gboolean new_string_cb(const gchar *option_name, const gchar *optarg, gpointer data, GError **error);
43 gboolean original_string_cb(const gchar *option_name, const gchar *optarg, gpointer data, GError **error);
44 gboolean patch_cb(const gchar *option_name, const gchar *optarg, gpointer data, GError **error);
45
46 static GOptionEntry original_xml_entries[] = {
47 { "original", 'o', 0, G_OPTION_ARG_STRING, &options.xml_file_1,
48 "XML is contained in the named file",
49 "FILE" },
50 { "original-string", 'O', 0, G_OPTION_ARG_CALLBACK, original_string_cb,
51 "XML is contained in the supplied string",
52 "STRING" },
53
54 { NULL }
55 };
56
57 static GOptionEntry operation_entries[] = {
58 { "new", 'n', 0, G_OPTION_ARG_STRING, &options.xml_file_2,
59 "Compare the original XML to the contents of the named file",
60 "FILE" },
61 { "new-string", 'N', 0, G_OPTION_ARG_CALLBACK, new_string_cb,
62 "Compare the original XML with the contents of the supplied string",
63 "STRING" },
64 { "patch", 'p', 0, G_OPTION_ARG_CALLBACK, patch_cb,
65 "Patch the original XML with the contents of the named file",
66 "FILE" },
67
68 { NULL }
69 };
70
71 static GOptionEntry addl_entries[] = {
72 { "cib", 'c', 0, G_OPTION_ARG_NONE, &options.as_cib,
73 "Compare/patch the inputs as a CIB (includes versions details)",
74 NULL },
75 { "stdin", 's', 0, G_OPTION_ARG_NONE, &options.use_stdin,
76 "",
77 NULL },
78 { "no-version", 'u', 0, G_OPTION_ARG_NONE, &options.no_version,
79 "Generate the difference without versions details",
80 NULL },
81
82 { NULL }
83 };
84
85 gboolean
86 new_string_cb(const gchar *option_name, const gchar *optarg, gpointer data, GError **error) {
87 options.raw_2 = TRUE;
88 pcmk__str_update(&options.xml_file_2, optarg);
89 return TRUE;
90 }
91
92 gboolean
93 original_string_cb(const gchar *option_name, const gchar *optarg, gpointer data, GError **error) {
94 options.raw_1 = TRUE;
95 pcmk__str_update(&options.xml_file_1, optarg);
96 return TRUE;
97 }
98
99 gboolean
100 patch_cb(const gchar *option_name, const gchar *optarg, gpointer data, GError **error) {
101 options.apply = TRUE;
102 pcmk__str_update(&options.xml_file_2, optarg);
103 return TRUE;
104 }
105
106 static void
107 print_patch(xmlNode *patch)
108 {
109 char *buffer = dump_xml_formatted(patch);
110
111 printf("%s\n", crm_str(buffer));
112 free(buffer);
113 fflush(stdout);
114 }
115
116 static int
117 apply_patch(xmlNode *input, xmlNode *patch, gboolean as_cib)
118 {
119 int rc;
120 xmlNode *output = copy_xml(input);
121
122 rc = xml_apply_patchset(output, patch, as_cib);
123 if (rc != pcmk_ok) {
124 fprintf(stderr, "Could not apply patch: %s\n", pcmk_strerror(rc));
125 free_xml(output);
126 return rc;
127 }
128
129 if (output != NULL) {
130 const char *version;
131 char *buffer;
132
133 print_patch(output);
134
135 version = crm_element_value(output, XML_ATTR_CRM_VERSION);
136 buffer = calculate_xml_versioned_digest(output, FALSE, TRUE, version);
137 crm_trace("Digest: %s\n", crm_str(buffer));
138 free(buffer);
139 free_xml(output);
140 }
141 return pcmk_ok;
142 }
143
144 static void
145 log_patch_cib_versions(xmlNode *patch)
146 {
147 int add[] = { 0, 0, 0 };
148 int del[] = { 0, 0, 0 };
149
150 const char *fmt = NULL;
151 const char *digest = NULL;
152
153 xml_patch_versions(patch, add, del);
154 fmt = crm_element_value(patch, "format");
155 digest = crm_element_value(patch, XML_ATTR_DIGEST);
156
157 if (add[2] != del[2] || add[1] != del[1] || add[0] != del[0]) {
158 crm_info("Patch: --- %d.%d.%d %s", del[0], del[1], del[2], fmt);
159 crm_info("Patch: +++ %d.%d.%d %s", add[0], add[1], add[2], digest);
160 }
161 }
162
163 static void
164 strip_patch_cib_version(xmlNode *patch, const char **vfields, size_t nvfields)
165 {
166 int format = 1;
167
168 crm_element_value_int(patch, "format", &format);
169 if (format == 2) {
170 xmlNode *version_xml = find_xml_node(patch, "version", FALSE);
171
172 if (version_xml) {
173 free_xml(version_xml);
174 }
175
176 } else {
177 int i = 0;
178
179 const char *tags[] = {
180 XML_TAG_DIFF_REMOVED,
181 XML_TAG_DIFF_ADDED,
182 };
183
184 for (i = 0; i < PCMK__NELEM(tags); i++) {
185 xmlNode *tmp = NULL;
186 int lpc;
187
188 tmp = find_xml_node(patch, tags[i], FALSE);
189 if (tmp) {
190 for (lpc = 0; lpc < nvfields; lpc++) {
191 xml_remove_prop(tmp, vfields[lpc]);
192 }
193
194 tmp = find_xml_node(tmp, XML_TAG_CIB, FALSE);
195 if (tmp) {
196 for (lpc = 0; lpc < nvfields; lpc++) {
197 xml_remove_prop(tmp, vfields[lpc]);
198 }
199 }
200 }
201 }
202 }
203 }
204
205 static int
206 generate_patch(xmlNode *object_1, xmlNode *object_2, const char *xml_file_2,
207 gboolean as_cib, gboolean no_version)
208 {
209 xmlNode *output = NULL;
210
211 const char *vfields[] = {
212 XML_ATTR_GENERATION_ADMIN,
213 XML_ATTR_GENERATION,
214 XML_ATTR_NUMUPDATES,
215 };
216
217
218
219 if (no_version) {
220 int lpc;
221
222 for (lpc = 0; lpc < PCMK__NELEM(vfields); lpc++) {
223 crm_copy_xml_element(object_1, object_2, vfields[lpc]);
224 }
225 }
226
227 xml_track_changes(object_2, NULL, object_2, FALSE);
228 if(as_cib) {
229 xml_calculate_significant_changes(object_1, object_2);
230 } else {
231 xml_calculate_changes(object_1, object_2);
232 }
233 crm_log_xml_debug(object_2, (xml_file_2? xml_file_2: "target"));
234
235 output = xml_create_patchset(0, object_1, object_2, NULL, FALSE);
236
237 xml_log_changes(LOG_INFO, __func__, object_2);
238 xml_accept_changes(object_2);
239
240 if (output == NULL) {
241 return pcmk_ok;
242 }
243
244 patchset_process_digest(output, object_1, object_2, as_cib);
245
246 if (as_cib) {
247 log_patch_cib_versions(output);
248
249 } else if (no_version) {
250 strip_patch_cib_version(output, vfields, PCMK__NELEM(vfields));
251 }
252
253 xml_log_patchset(LOG_NOTICE, __func__, output);
254 print_patch(output);
255 free_xml(output);
256 return -pcmk_err_generic;
257 }
258
259 static GOptionContext *
260 build_arg_context(pcmk__common_args_t *args) {
261 GOptionContext *context = NULL;
262
263 const char *description = "Examples:\n\n"
264 "Obtain the two different configuration files by running cibadmin on the two cluster setups to compare:\n\n"
265 "\t# cibadmin --query > cib-old.xml\n\n"
266 "\t# cibadmin --query > cib-new.xml\n\n"
267 "Calculate and save the difference between the two files:\n\n"
268 "\t# crm_diff --original cib-old.xml --new cib-new.xml > patch.xml\n\n"
269 "Apply the patch to the original file:\n\n"
270 "\t# crm_diff --original cib-old.xml --patch patch.xml > updated.xml\n\n"
271 "Apply the patch to the running cluster:\n\n"
272 "\t# cibadmin --patch -x patch.xml\n";
273
274 context = pcmk__build_arg_context(args, NULL, NULL, NULL);
275 g_option_context_set_description(context, description);
276
277 pcmk__add_arg_group(context, "xml", "Original XML:",
278 "Show original XML options", original_xml_entries);
279 pcmk__add_arg_group(context, "operation", "Operation:",
280 "Show operation options", operation_entries);
281 pcmk__add_arg_group(context, "additional", "Additional Options:",
282 "Show additional options", addl_entries);
283 return context;
284 }
285
286 int
287 main(int argc, char **argv)
288 {
289 xmlNode *object_1 = NULL;
290 xmlNode *object_2 = NULL;
291
292 crm_exit_t exit_code = CRM_EX_OK;
293 GError *error = NULL;
294
295 pcmk__common_args_t *args = pcmk__new_common_args(SUMMARY);
296 gchar **processed_args = pcmk__cmdline_preproc(argv, "nopNO");
297 GOptionContext *context = build_arg_context(args);
298
299 if (!g_option_context_parse_strv(context, &processed_args, &error)) {
300 exit_code = CRM_EX_USAGE;
301 goto done;
302 }
303
304 pcmk__cli_init_logging("crm_diff", args->verbosity);
305
306 if (args->version) {
307 g_strfreev(processed_args);
308 pcmk__free_arg_context(context);
309
310 pcmk__cli_help('v', CRM_EX_OK);
311 }
312
313 if (options.apply && options.no_version) {
314 fprintf(stderr, "warning: -u/--no-version ignored with -p/--patch\n");
315 } else if (options.as_cib && options.no_version) {
316 fprintf(stderr, "error: -u/--no-version incompatible with -c/--cib\n");
317 exit_code = CRM_EX_USAGE;
318 goto done;
319 }
320
321 if (options.raw_1) {
322 object_1 = string2xml(options.xml_file_1);
323
324 } else if (options.use_stdin) {
325 fprintf(stderr, "Input first XML fragment:");
326 object_1 = stdin2xml();
327
328 } else if (options.xml_file_1 != NULL) {
329 object_1 = filename2xml(options.xml_file_1);
330 }
331
332 if (options.raw_2) {
333 object_2 = string2xml(options.xml_file_2);
334
335 } else if (options.use_stdin) {
336 fprintf(stderr, "Input second XML fragment:");
337 object_2 = stdin2xml();
338
339 } else if (options.xml_file_2 != NULL) {
340 object_2 = filename2xml(options.xml_file_2);
341 }
342
343 if (object_1 == NULL) {
344 fprintf(stderr, "Could not parse the first XML fragment\n");
345 exit_code = CRM_EX_DATAERR;
346 goto done;
347 }
348 if (object_2 == NULL) {
349 fprintf(stderr, "Could not parse the second XML fragment\n");
350 exit_code = CRM_EX_DATAERR;
351 goto done;
352 }
353
354 if (options.apply) {
355 int ret = apply_patch(object_1, object_2, options.as_cib);
356 exit_code = crm_errno2exit(ret);
357 } else {
358 int ret = generate_patch(object_1, object_2, options.xml_file_2, options.as_cib, options.no_version);
359 exit_code = crm_errno2exit(ret);
360 }
361
362 done:
363 g_strfreev(processed_args);
364 pcmk__free_arg_context(context);
365 free(options.xml_file_1);
366 free(options.xml_file_2);
367 free_xml(object_1);
368 free_xml(object_2);
369
370 pcmk__output_and_clear_error(error, NULL);
371 crm_exit(exit_code);
372 }
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