1/*-
2 * Copyright (c) 2004-2009 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("$FreeBSD$");
29
30#include <sys/param.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/mirror/g_mirror.h>
41#include <core/geom.h>
42#include <misc/subr.h>
43
44uint32_t lib_version = G_LIB_VERSION;
45uint32_t version = G_MIRROR_VERSION;
46
47#define	GMIRROR_BALANCE		"load"
48#define	GMIRROR_SLICE		"4096"
49#define	GMIRROR_PRIORITY	"0"
50
51static void mirror_main(struct gctl_req *req, unsigned flags);
52static void mirror_activate(struct gctl_req *req);
53static void mirror_clear(struct gctl_req *req);
54static void mirror_dump(struct gctl_req *req);
55static void mirror_label(struct gctl_req *req);
56
57struct g_command class_commands[] = {
58	{ "activate", G_FLAG_VERBOSE, mirror_main, G_NULL_OPTS,
59	    "[-v] name prov ..."
60	},
61	{ "clear", G_FLAG_VERBOSE, mirror_main, G_NULL_OPTS,
62	    "[-v] prov ..."
63	},
64	{ "configure", G_FLAG_VERBOSE, NULL,
65	    {
66		{ 'a', "autosync", NULL, G_TYPE_BOOL },
67		{ 'b', "balance", "", G_TYPE_STRING },
68		{ 'd', "dynamic", NULL, G_TYPE_BOOL },
69		{ 'f', "failsync", NULL, G_TYPE_BOOL },
70		{ 'F', "nofailsync", NULL, G_TYPE_BOOL },
71		{ 'h', "hardcode", NULL, G_TYPE_BOOL },
72		{ 'n', "noautosync", NULL, G_TYPE_BOOL },
73		{ 'p', "priority", "-1", G_TYPE_NUMBER },
74		{ 's', "slice", "-1", G_TYPE_NUMBER },
75		G_OPT_SENTINEL
76	    },
77	    "[-adfFhnv] [-b balance] [-s slice] name\n"
78	    "[-v] -p priority name prov"
79	},
80	{ "deactivate", G_FLAG_VERBOSE, NULL, G_NULL_OPTS,
81	    "[-v] name prov ..."
82	},
83	{ "dump", 0, mirror_main, G_NULL_OPTS,
84	    "prov ..."
85	},
86	{ "forget", G_FLAG_VERBOSE, NULL, G_NULL_OPTS,
87	    "name ..."
88	},
89	{ "label", G_FLAG_VERBOSE, mirror_main,
90	    {
91		{ 'b', "balance", GMIRROR_BALANCE, G_TYPE_STRING },
92		{ 'F', "nofailsync", NULL, G_TYPE_BOOL },
93		{ 'h', "hardcode", NULL, G_TYPE_BOOL },
94		{ 'n', "noautosync", NULL, G_TYPE_BOOL },
95		{ 's', "slice", GMIRROR_SLICE, G_TYPE_NUMBER },
96		G_OPT_SENTINEL
97	    },
98	    "[-Fhnv] [-b balance] [-s slice] name prov ..."
99	},
100	{ "insert", G_FLAG_VERBOSE, NULL,
101	    {
102		{ 'h', "hardcode", NULL, G_TYPE_BOOL },
103		{ 'i', "inactive", NULL, G_TYPE_BOOL },
104		{ 'p', "priority", GMIRROR_PRIORITY, G_TYPE_NUMBER },
105		G_OPT_SENTINEL
106	    },
107	    "[-hiv] [-p priority] name prov ..."
108	},
109	{ "rebuild", G_FLAG_VERBOSE, NULL, G_NULL_OPTS,
110	    "[-v] name prov ..."
111	},
112	{ "remove", G_FLAG_VERBOSE, NULL, G_NULL_OPTS,
113	    "[-v] name prov ..."
114	},
115	{ "stop", G_FLAG_VERBOSE, NULL,
116	    {
117		{ 'f', "force", NULL, G_TYPE_BOOL },
118		G_OPT_SENTINEL
119	    },
120	    "[-fv] name ..."
121	},
122	G_CMD_SENTINEL
123};
124
125static int verbose = 0;
126
127static void
128mirror_main(struct gctl_req *req, unsigned flags)
129{
130	const char *name;
131
132	if ((flags & G_FLAG_VERBOSE) != 0)
133		verbose = 1;
134
135	name = gctl_get_ascii(req, "verb");
136	if (name == NULL) {
137		gctl_error(req, "No '%s' argument.", "verb");
138		return;
139	}
140	if (strcmp(name, "label") == 0)
141		mirror_label(req);
142	else if (strcmp(name, "clear") == 0)
143		mirror_clear(req);
144	else if (strcmp(name, "dump") == 0)
145		mirror_dump(req);
146	else if (strcmp(name, "activate") == 0)
147		mirror_activate(req);
148	else
149		gctl_error(req, "Unknown command: %s.", name);
150}
151
152static void
153mirror_label(struct gctl_req *req)
154{
155	struct g_mirror_metadata md;
156	u_char sector[512];
157	const char *str;
158	unsigned sectorsize;
159	off_t mediasize;
160	intmax_t val;
161	int error, i, nargs, bal, hardcode;
162
163	nargs = gctl_get_int(req, "nargs");
164	if (nargs < 2) {
165		gctl_error(req, "Too few arguments.");
166		return;
167	}
168
169	strlcpy(md.md_magic, G_MIRROR_MAGIC, sizeof(md.md_magic));
170	md.md_version = G_MIRROR_VERSION;
171	str = gctl_get_ascii(req, "arg0");
172	strlcpy(md.md_name, str, sizeof(md.md_name));
173	md.md_mid = arc4random();
174	md.md_all = nargs - 1;
175	md.md_mflags = 0;
176	md.md_dflags = 0;
177	md.md_genid = 0;
178	md.md_syncid = 1;
179	md.md_sync_offset = 0;
180	val = gctl_get_intmax(req, "slice");
181	md.md_slice = val;
182	str = gctl_get_ascii(req, "balance");
183	bal = balance_id(str);
184	if (bal == -1) {
185		gctl_error(req, "Invalid balance algorithm.");
186		return;
187	}
188	md.md_balance = bal;
189	if (gctl_get_int(req, "noautosync"))
190		md.md_mflags |= G_MIRROR_DEVICE_FLAG_NOAUTOSYNC;
191	if (gctl_get_int(req, "nofailsync"))
192		md.md_mflags |= G_MIRROR_DEVICE_FLAG_NOFAILSYNC;
193	hardcode = gctl_get_int(req, "hardcode");
194
195	/*
196	 * Calculate sectorsize by finding least common multiple from
197	 * sectorsizes of every disk and find the smallest mediasize.
198	 */
199	mediasize = 0;
200	sectorsize = 0;
201	for (i = 1; i < nargs; i++) {
202		unsigned ssize;
203		off_t msize;
204
205		str = gctl_get_ascii(req, "arg%d", i);
206		msize = g_get_mediasize(str);
207		ssize = g_get_sectorsize(str);
208		if (msize == 0 || ssize == 0) {
209			gctl_error(req, "Can't get informations about %s: %s.",
210			    str, strerror(errno));
211			return;
212		}
213		msize -= ssize;
214		if (mediasize == 0 || (mediasize > 0 && msize < mediasize))
215			mediasize = msize;
216		if (sectorsize == 0)
217			sectorsize = ssize;
218		else
219			sectorsize = g_lcm(sectorsize, ssize);
220	}
221	md.md_mediasize = mediasize;
222	md.md_sectorsize = sectorsize;
223	md.md_mediasize -= (md.md_mediasize % md.md_sectorsize);
224
225	/*
226	 * Clear last sector first, to spoil all components if device exists.
227	 */
228	for (i = 1; i < nargs; i++) {
229		str = gctl_get_ascii(req, "arg%d", i);
230		error = g_metadata_clear(str, NULL);
231		if (error != 0) {
232			gctl_error(req, "Can't store metadata on %s: %s.", str,
233			    strerror(error));
234			return;
235		}
236	}
237
238	/*
239	 * Ok, store metadata (use disk number as priority).
240	 */
241	for (i = 1; i < nargs; i++) {
242		str = gctl_get_ascii(req, "arg%d", i);
243		md.md_did = arc4random();
244		md.md_priority = i - 1;
245		md.md_provsize = g_get_mediasize(str);
246		assert(md.md_provsize != 0);
247		if (!hardcode)
248			bzero(md.md_provider, sizeof(md.md_provider));
249		else {
250			if (strncmp(str, _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0)
251				str += sizeof(_PATH_DEV) - 1;
252			strlcpy(md.md_provider, str, sizeof(md.md_provider));
253		}
254		mirror_metadata_encode(&md, sector);
255		error = g_metadata_store(str, sector, sizeof(sector));
256		if (error != 0) {
257			fprintf(stderr, "Can't store metadata on %s: %s.\n",
258			    str, strerror(error));
259			gctl_error(req, "Not fully done.");
260			continue;
261		}
262		if (verbose)
263			printf("Metadata value stored on %s.\n", str);
264	}
265}
266
267static void
268mirror_clear(struct gctl_req *req)
269{
270	const char *name;
271	int error, i, nargs;
272
273	nargs = gctl_get_int(req, "nargs");
274	if (nargs < 1) {
275		gctl_error(req, "Too few arguments.");
276		return;
277	}
278
279	for (i = 0; i < nargs; i++) {
280		name = gctl_get_ascii(req, "arg%d", i);
281		error = g_metadata_clear(name, G_MIRROR_MAGIC);
282		if (error != 0) {
283			fprintf(stderr, "Can't clear metadata on %s: %s.\n",
284			    name, strerror(error));
285			gctl_error(req, "Not fully done.");
286			continue;
287		}
288		if (verbose)
289			printf("Metadata cleared on %s.\n", name);
290	}
291}
292
293static void
294mirror_dump(struct gctl_req *req)
295{
296	struct g_mirror_metadata md, tmpmd;
297	const char *name;
298	int error, i, nargs;
299
300	nargs = gctl_get_int(req, "nargs");
301	if (nargs < 1) {
302		gctl_error(req, "Too few arguments.");
303		return;
304	}
305
306	for (i = 0; i < nargs; i++) {
307		name = gctl_get_ascii(req, "arg%d", i);
308		error = g_metadata_read(name, (u_char *)&tmpmd, sizeof(tmpmd),
309		    G_MIRROR_MAGIC);
310		if (error != 0) {
311			fprintf(stderr, "Can't read metadata from %s: %s.\n",
312			    name, strerror(error));
313			gctl_error(req, "Not fully done.");
314			continue;
315		}
316		if (mirror_metadata_decode((u_char *)&tmpmd, &md) != 0) {
317			fprintf(stderr, "MD5 hash mismatch for %s, skipping.\n",
318			    name);
319			gctl_error(req, "Not fully done.");
320			continue;
321		}
322		printf("Metadata on %s:\n", name);
323		mirror_metadata_dump(&md);
324		printf("\n");
325	}
326}
327
328static void
329mirror_activate(struct gctl_req *req)
330{
331	struct g_mirror_metadata md, tmpmd;
332	const char *name, *path;
333	int error, i, nargs;
334
335	nargs = gctl_get_int(req, "nargs");
336	if (nargs < 2) {
337		gctl_error(req, "Too few arguments.");
338		return;
339	}
340	name = gctl_get_ascii(req, "arg0");
341
342	for (i = 1; i < nargs; i++) {
343		path = gctl_get_ascii(req, "arg%d", i);
344		error = g_metadata_read(path, (u_char *)&tmpmd, sizeof(tmpmd),
345		    G_MIRROR_MAGIC);
346		if (error != 0) {
347			fprintf(stderr, "Cannot read metadata from %s: %s.\n",
348			    path, strerror(error));
349			gctl_error(req, "Not fully done.");
350			continue;
351		}
352		if (mirror_metadata_decode((u_char *)&tmpmd, &md) != 0) {
353			fprintf(stderr,
354			    "MD5 hash mismatch for provider %s, skipping.\n",
355			    path);
356			gctl_error(req, "Not fully done.");
357			continue;
358		}
359		if (strcmp(md.md_name, name) != 0) {
360			fprintf(stderr,
361			    "Provider %s is not the mirror %s component.\n",
362			    path, name);
363			gctl_error(req, "Not fully done.");
364			continue;
365		}
366		md.md_dflags &= ~G_MIRROR_DISK_FLAG_INACTIVE;
367		mirror_metadata_encode(&md, (u_char *)&tmpmd);
368		error = g_metadata_store(path, (u_char *)&tmpmd, sizeof(tmpmd));
369		if (error != 0) {
370			fprintf(stderr, "Cannot write metadata from %s: %s.\n",
371			    path, strerror(error));
372			gctl_error(req, "Not fully done.");
373			continue;
374		}
375		if (verbose)
376			printf("Provider %s activated.\n", path);
377	}
378}
379