1 /*-
2 * Copyright (c) 2005-2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD: stable/9/sbin/geom/class/journal/geom_journal.c 213662 2010-10-09 20:20:27Z ae $");
29
30 #include <sys/types.h>
31 #include <errno.h>
32 #include <paths.h>
33 #include <stdio.h>
34 #include <stdlib.h>
35 #include <stdint.h>
36 #include <string.h>
37 #include <strings.h>
38 #include <assert.h>
39 #include <libgeom.h>
40 #include <geom/journal/g_journal.h>
41 #include <core/geom.h>
42 #include <misc/subr.h>
43
44 #include "geom_journal.h"
45
46
47 uint32_t lib_version = G_LIB_VERSION;
48 uint32_t version = G_JOURNAL_VERSION;
49
50 static void journal_main(struct gctl_req *req, unsigned flags);
51 static void journal_clear(struct gctl_req *req);
52 static void journal_dump(struct gctl_req *req);
53 static void journal_label(struct gctl_req *req);
54
55 struct g_command class_commands[] = {
56 { "clear", G_FLAG_VERBOSE, journal_main, G_NULL_OPTS,
57 "[-v] prov ..."
58 },
59 { "dump", 0, journal_main, G_NULL_OPTS,
60 "prov ..."
61 },
62 { "label", G_FLAG_VERBOSE, journal_main,
63 {
64 { 'c', "checksum", NULL, G_TYPE_BOOL },
65 { 'f', "force", NULL, G_TYPE_BOOL },
66 { 'h', "hardcode", NULL, G_TYPE_BOOL },
67 { 's', "jsize", "-1", G_TYPE_NUMBER },
68 G_OPT_SENTINEL
69 },
70 "[-cfhv] [-s jsize] dataprov [jprov]"
71 },
72 { "stop", G_FLAG_VERBOSE, NULL,
73 {
74 { 'f', "force", NULL, G_TYPE_BOOL },
75 G_OPT_SENTINEL
76 },
77 "[-fv] name ..."
78 },
79 { "sync", G_FLAG_VERBOSE, NULL, G_NULL_OPTS,
80 "[-v]"
81 },
82 G_CMD_SENTINEL
83 };
84
85 static int verbose = 0;
86
87 static void
journal_main(struct gctl_req * req,unsigned flags)88 journal_main(struct gctl_req *req, unsigned flags)
89 {
90 const char *name;
91
92 if ((flags & G_FLAG_VERBOSE) != 0)
93 verbose = 1;
94
95 name = gctl_get_ascii(req, "verb");
96 if (name == NULL) {
97 gctl_error(req, "No '%s' argument.", "verb");
98 return;
99 }
100 if (strcmp(name, "label") == 0)
101 journal_label(req);
102 else if (strcmp(name, "clear") == 0)
103 journal_clear(req);
104 else if (strcmp(name, "dump") == 0)
105 journal_dump(req);
106 else
107 gctl_error(req, "Unknown command: %s.", name);
108 }
109
110 static int
g_journal_fs_exists(const char * prov)111 g_journal_fs_exists(const char *prov)
112 {
113
114 if (g_journal_ufs_exists(prov))
115 return (1);
116 #if 0
117 if (g_journal_otherfs_exists(prov))
118 return (1);
119 #endif
120 return (0);
121 }
122
123 static int
g_journal_fs_using_last_sector(const char * prov)124 g_journal_fs_using_last_sector(const char *prov)
125 {
126
127 if (g_journal_ufs_using_last_sector(prov))
128 return (1);
129 #if 0
130 if (g_journal_otherfs_using_last_sector(prov))
131 return (1);
132 #endif
133 return (0);
134 }
135
136 static void
journal_label(struct gctl_req * req)137 journal_label(struct gctl_req *req)
138 {
139 struct g_journal_metadata md;
140 const char *data, *journal, *str;
141 u_char sector[512];
142 intmax_t jsize, msize, ssize;
143 int error, force, i, nargs, checksum, hardcode;
144
145 nargs = gctl_get_int(req, "nargs");
146 str = NULL; /* gcc */
147
148 strlcpy(md.md_magic, G_JOURNAL_MAGIC, sizeof(md.md_magic));
149 md.md_version = G_JOURNAL_VERSION;
150 md.md_id = arc4random();
151 md.md_joffset = 0;
152 md.md_jid = 0;
153 md.md_flags = GJ_FLAG_CLEAN;
154 checksum = gctl_get_int(req, "checksum");
155 if (checksum)
156 md.md_flags |= GJ_FLAG_CHECKSUM;
157 force = gctl_get_int(req, "force");
158 hardcode = gctl_get_int(req, "hardcode");
159
160 if (nargs != 1 && nargs != 2) {
161 gctl_error(req, "Invalid number of arguments.");
162 return;
163 }
164
165 /* Verify the given providers. */
166 for (i = 0; i < nargs; i++) {
167 str = gctl_get_ascii(req, "arg%d", i);
168 if (g_get_mediasize(str) == 0) {
169 gctl_error(req, "Invalid provider %s.", str);
170 return;
171 }
172 }
173
174 data = gctl_get_ascii(req, "arg0");
175 jsize = gctl_get_intmax(req, "jsize");
176 journal = NULL;
177 switch (nargs) {
178 case 1:
179 if (!force && g_journal_fs_exists(data)) {
180 gctl_error(req, "File system exists on %s and this "
181 "operation would destroy it.\nUse -f if you "
182 "really want to do it.", data);
183 return;
184 }
185 journal = data;
186 msize = g_get_mediasize(data);
187 ssize = g_get_sectorsize(data);
188 if (jsize == -1) {
189 /*
190 * No journal size specified. 1GB should be safe
191 * default.
192 */
193 jsize = 1073741824ULL;
194 } else {
195 if (jsize < 104857600) {
196 gctl_error(req, "Journal too small.");
197 return;
198 }
199 if ((jsize % ssize) != 0) {
200 gctl_error(req, "Invalid journal size.");
201 return;
202 }
203 }
204 if (jsize + ssize >= msize) {
205 gctl_error(req, "Provider too small for journalling. "
206 "You can try smaller jsize (default is %jd).",
207 jsize);
208 return;
209 }
210 md.md_jstart = msize - ssize - jsize;
211 md.md_jend = msize - ssize;
212 break;
213 case 2:
214 if (!force && g_journal_fs_using_last_sector(data)) {
215 gctl_error(req, "File system on %s is using the last "
216 "sector and this operation is going to overwrite "
217 "it. Use -f if you really want to do it.", data);
218 return;
219 }
220 journal = gctl_get_ascii(req, "arg1");
221 if (jsize != -1) {
222 gctl_error(req, "jsize argument is valid only for "
223 "all-in-one configuration.");
224 return;
225 }
226 msize = g_get_mediasize(journal);
227 ssize = g_get_sectorsize(journal);
228 md.md_jstart = 0;
229 md.md_jend = msize - ssize;
230 break;
231 }
232
233 if (g_get_sectorsize(data) != g_get_sectorsize(journal)) {
234 gctl_error(req, "Not equal sector sizes.");
235 return;
236 }
237
238 /*
239 * Clear last sector first, to spoil all components if device exists.
240 */
241 for (i = 0; i < nargs; i++) {
242 str = gctl_get_ascii(req, "arg%d", i);
243 error = g_metadata_clear(str, NULL);
244 if (error != 0) {
245 gctl_error(req, "Cannot clear metadata on %s: %s.", str,
246 strerror(error));
247 return;
248 }
249 }
250
251 /*
252 * Ok, store metadata.
253 */
254 for (i = 0; i < nargs; i++) {
255 switch (i) {
256 case 0:
257 str = data;
258 md.md_type = GJ_TYPE_DATA;
259 if (nargs == 1)
260 md.md_type |= GJ_TYPE_JOURNAL;
261 break;
262 case 1:
263 str = journal;
264 md.md_type = GJ_TYPE_JOURNAL;
265 break;
266 }
267 md.md_provsize = g_get_mediasize(str);
268 assert(md.md_provsize != 0);
269 if (!hardcode)
270 bzero(md.md_provider, sizeof(md.md_provider));
271 else {
272 if (strncmp(str, _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0)
273 str += sizeof(_PATH_DEV) - 1;
274 strlcpy(md.md_provider, str, sizeof(md.md_provider));
275 }
276 journal_metadata_encode(&md, sector);
277 error = g_metadata_store(str, sector, sizeof(sector));
278 if (error != 0) {
279 fprintf(stderr, "Cannot store metadata on %s: %s.\n",
280 str, strerror(error));
281 gctl_error(req, "Not fully done.");
282 continue;
283 }
284 if (verbose)
285 printf("Metadata value stored on %s.\n", str);
286 }
287 }
288
289 static void
journal_clear(struct gctl_req * req)290 journal_clear(struct gctl_req *req)
291 {
292 const char *name;
293 int error, i, nargs;
294
295 nargs = gctl_get_int(req, "nargs");
296 if (nargs < 1) {
297 gctl_error(req, "Too few arguments.");
298 return;
299 }
300
301 for (i = 0; i < nargs; i++) {
302 name = gctl_get_ascii(req, "arg%d", i);
303 error = g_metadata_clear(name, G_JOURNAL_MAGIC);
304 if (error != 0) {
305 fprintf(stderr, "Cannot clear metadata on %s: %s.\n",
306 name, strerror(error));
307 gctl_error(req, "Not fully done.");
308 continue;
309 }
310 if (verbose)
311 printf("Metadata cleared on %s.\n", name);
312 }
313 }
314
315 static void
journal_dump(struct gctl_req * req)316 journal_dump(struct gctl_req *req)
317 {
318 struct g_journal_metadata md, tmpmd;
319 const char *name;
320 int error, i, nargs;
321
322 nargs = gctl_get_int(req, "nargs");
323 if (nargs < 1) {
324 gctl_error(req, "Too few arguments.");
325 return;
326 }
327
328 for (i = 0; i < nargs; i++) {
329 name = gctl_get_ascii(req, "arg%d", i);
330 error = g_metadata_read(name, (u_char *)&tmpmd, sizeof(tmpmd),
331 G_JOURNAL_MAGIC);
332 if (error != 0) {
333 fprintf(stderr, "Cannot read metadata from %s: %s.\n",
334 name, strerror(error));
335 gctl_error(req, "Not fully done.");
336 continue;
337 }
338 if (journal_metadata_decode((u_char *)&tmpmd, &md) != 0) {
339 fprintf(stderr, "MD5 hash mismatch for %s, skipping.\n",
340 name);
341 gctl_error(req, "Not fully done.");
342 continue;
343 }
344 printf("Metadata on %s:\n", name);
345 journal_metadata_dump(&md);
346 printf("\n");
347 }
348 }
349