1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2004-2009 Pawel Jakub Dawidek <pjd@FreeBSD.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD$");
31
32#include <sys/param.h>
33#include <err.h>
34#include <errno.h>
35#include <paths.h>
36#include <stdio.h>
37#include <stdlib.h>
38#include <stdint.h>
39#include <string.h>
40#include <strings.h>
41#include <assert.h>
42#include <libgeom.h>
43#include <geom/mirror/g_mirror.h>
44#include <core/geom.h>
45#include <misc/subr.h>
46
47uint32_t lib_version = G_LIB_VERSION;
48uint32_t version = G_MIRROR_VERSION;
49
50#define	GMIRROR_BALANCE		"load"
51#define	GMIRROR_SLICE		"4096"
52#define	GMIRROR_PRIORITY	"0"
53
54static void mirror_main(struct gctl_req *req, unsigned flags);
55static void mirror_activate(struct gctl_req *req);
56static void mirror_clear(struct gctl_req *req);
57static void mirror_dump(struct gctl_req *req);
58static void mirror_label(struct gctl_req *req);
59static void mirror_resize(struct gctl_req *req, unsigned flags);
60
61struct g_command class_commands[] = {
62	{ "activate", G_FLAG_VERBOSE, mirror_main, G_NULL_OPTS,
63	    "[-v] name prov ..."
64	},
65	{ "clear", G_FLAG_VERBOSE, mirror_main, G_NULL_OPTS,
66	    "[-v] prov ..."
67	},
68	{ "configure", G_FLAG_VERBOSE, NULL,
69	    {
70		{ 'a', "autosync", NULL, G_TYPE_BOOL },
71		{ 'b', "balance", "", G_TYPE_STRING },
72		{ 'd', "dynamic", NULL, G_TYPE_BOOL },
73		{ 'f', "failsync", NULL, G_TYPE_BOOL },
74		{ 'F', "nofailsync", NULL, G_TYPE_BOOL },
75		{ 'h', "hardcode", NULL, G_TYPE_BOOL },
76		{ 'n', "noautosync", NULL, G_TYPE_BOOL },
77		{ 'p', "priority", "-1", G_TYPE_NUMBER },
78		{ 's', "slice", "-1", G_TYPE_NUMBER },
79		G_OPT_SENTINEL
80	    },
81	    "[-adfFhnv] [-b balance] [-s slice] name\n"
82	    "[-v] -p priority name prov"
83	},
84	{ "create", G_FLAG_VERBOSE, NULL,
85	    {
86		{ 'b', "balance", GMIRROR_BALANCE, G_TYPE_STRING },
87		{ 'F', "nofailsync", NULL, G_TYPE_BOOL },
88		{ 'n', "noautosync", NULL, G_TYPE_BOOL },
89		{ 's', "slice", GMIRROR_SLICE, G_TYPE_NUMBER },
90		G_OPT_SENTINEL
91	    },
92	    "[-Fnv] [-b balance] [-s slice] name prov ..."
93	},
94	{ "deactivate", G_FLAG_VERBOSE, NULL, G_NULL_OPTS,
95	    "[-v] name prov ..."
96	},
97	{ "destroy", G_FLAG_VERBOSE, NULL,
98	    {
99		{ 'f', "force", NULL, G_TYPE_BOOL },
100		G_OPT_SENTINEL
101	    },
102	    "[-fv] name ..."
103	},
104	{ "dump", 0, mirror_main, G_NULL_OPTS,
105	    "prov ..."
106	},
107	{ "forget", G_FLAG_VERBOSE, NULL, G_NULL_OPTS,
108	    "name ..."
109	},
110	{ "label", G_FLAG_VERBOSE, mirror_main,
111	    {
112		{ 'b', "balance", GMIRROR_BALANCE, G_TYPE_STRING },
113		{ 'F', "nofailsync", NULL, G_TYPE_BOOL },
114		{ 'h', "hardcode", NULL, G_TYPE_BOOL },
115		{ 'n', "noautosync", NULL, G_TYPE_BOOL },
116		{ 's', "slice", GMIRROR_SLICE, G_TYPE_NUMBER },
117		G_OPT_SENTINEL
118	    },
119	    "[-Fhnv] [-b balance] [-s slice] name prov ..."
120	},
121	{ "insert", G_FLAG_VERBOSE, NULL,
122	    {
123		{ 'h', "hardcode", NULL, G_TYPE_BOOL },
124		{ 'i', "inactive", NULL, G_TYPE_BOOL },
125		{ 'p', "priority", GMIRROR_PRIORITY, G_TYPE_NUMBER },
126		G_OPT_SENTINEL
127	    },
128	    "[-hiv] [-p priority] name prov ..."
129	},
130	{ "rebuild", G_FLAG_VERBOSE, NULL, G_NULL_OPTS,
131	    "[-v] name prov ..."
132	},
133	{ "remove", G_FLAG_VERBOSE, NULL, G_NULL_OPTS,
134	    "[-v] name prov ..."
135	},
136	{ "resize", G_FLAG_VERBOSE, mirror_resize,
137	    {
138		{ 's', "size", "*", G_TYPE_STRING },
139		G_OPT_SENTINEL
140	    },
141	    "[-s size] [-v] name"
142	},
143	{ "stop", G_FLAG_VERBOSE, NULL,
144	    {
145		{ 'f', "force", NULL, G_TYPE_BOOL },
146		G_OPT_SENTINEL
147	    },
148	    "[-fv] name ..."
149	},
150	G_CMD_SENTINEL
151};
152
153static int verbose = 0;
154
155static void
156mirror_main(struct gctl_req *req, unsigned flags)
157{
158	const char *name;
159
160	if ((flags & G_FLAG_VERBOSE) != 0)
161		verbose = 1;
162
163	name = gctl_get_ascii(req, "verb");
164	if (name == NULL) {
165		gctl_error(req, "No '%s' argument.", "verb");
166		return;
167	}
168	if (strcmp(name, "label") == 0)
169		mirror_label(req);
170	else if (strcmp(name, "clear") == 0)
171		mirror_clear(req);
172	else if (strcmp(name, "dump") == 0)
173		mirror_dump(req);
174	else if (strcmp(name, "activate") == 0)
175		mirror_activate(req);
176	else
177		gctl_error(req, "Unknown command: %s.", name);
178}
179
180static void
181mirror_label(struct gctl_req *req)
182{
183	struct g_mirror_metadata md;
184	u_char sector[512];
185	const char *str;
186	unsigned sectorsize;
187	off_t mediasize;
188	intmax_t val;
189	int error, i, nargs, bal, hardcode;
190
191	bzero(sector, sizeof(sector));
192	nargs = gctl_get_int(req, "nargs");
193	if (nargs < 2) {
194		gctl_error(req, "Too few arguments.");
195		return;
196	}
197
198	strlcpy(md.md_magic, G_MIRROR_MAGIC, sizeof(md.md_magic));
199	md.md_version = G_MIRROR_VERSION;
200	str = gctl_get_ascii(req, "arg0");
201	strlcpy(md.md_name, str, sizeof(md.md_name));
202	md.md_mid = arc4random();
203	md.md_all = nargs - 1;
204	md.md_mflags = 0;
205	md.md_dflags = 0;
206	md.md_genid = 0;
207	md.md_syncid = 1;
208	md.md_sync_offset = 0;
209	val = gctl_get_intmax(req, "slice");
210	md.md_slice = val;
211	str = gctl_get_ascii(req, "balance");
212	bal = balance_id(str);
213	if (bal == -1) {
214		gctl_error(req, "Invalid balance algorithm.");
215		return;
216	}
217	md.md_balance = bal;
218	if (gctl_get_int(req, "noautosync"))
219		md.md_mflags |= G_MIRROR_DEVICE_FLAG_NOAUTOSYNC;
220	if (gctl_get_int(req, "nofailsync"))
221		md.md_mflags |= G_MIRROR_DEVICE_FLAG_NOFAILSYNC;
222	hardcode = gctl_get_int(req, "hardcode");
223
224	/*
225	 * Calculate sectorsize by finding least common multiple from
226	 * sectorsizes of every disk and find the smallest mediasize.
227	 */
228	mediasize = 0;
229	sectorsize = 0;
230	for (i = 1; i < nargs; i++) {
231		unsigned ssize;
232		off_t msize;
233
234		str = gctl_get_ascii(req, "arg%d", i);
235		msize = g_get_mediasize(str);
236		ssize = g_get_sectorsize(str);
237		if (msize == 0 || ssize == 0) {
238			gctl_error(req, "Can't get informations about %s: %s.",
239			    str, strerror(errno));
240			return;
241		}
242		msize -= ssize;
243		if (mediasize == 0 || (mediasize > 0 && msize < mediasize))
244			mediasize = msize;
245		if (sectorsize == 0)
246			sectorsize = ssize;
247		else
248			sectorsize = g_lcm(sectorsize, ssize);
249	}
250	md.md_mediasize = mediasize;
251	md.md_sectorsize = sectorsize;
252	md.md_mediasize -= (md.md_mediasize % md.md_sectorsize);
253
254	/*
255	 * Clear last sector first, to spoil all components if device exists.
256	 */
257	for (i = 1; i < nargs; i++) {
258		str = gctl_get_ascii(req, "arg%d", i);
259		error = g_metadata_clear(str, NULL);
260		if (error != 0) {
261			gctl_error(req, "Can't store metadata on %s: %s.", str,
262			    strerror(error));
263			return;
264		}
265	}
266
267	/*
268	 * Ok, store metadata (use disk number as priority).
269	 */
270	for (i = 1; i < nargs; i++) {
271		str = gctl_get_ascii(req, "arg%d", i);
272		md.md_did = arc4random();
273		md.md_priority = i - 1;
274		md.md_provsize = g_get_mediasize(str);
275		assert(md.md_provsize != 0);
276		if (!hardcode)
277			bzero(md.md_provider, sizeof(md.md_provider));
278		else {
279			if (strncmp(str, _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0)
280				str += sizeof(_PATH_DEV) - 1;
281			strlcpy(md.md_provider, str, sizeof(md.md_provider));
282		}
283		mirror_metadata_encode(&md, sector);
284		error = g_metadata_store(str, sector, sizeof(sector));
285		if (error != 0) {
286			fprintf(stderr, "Can't store metadata on %s: %s.\n",
287			    str, strerror(error));
288			gctl_error(req, "Not fully done.");
289			continue;
290		}
291		if (verbose)
292			printf("Metadata value stored on %s.\n", str);
293	}
294}
295
296static void
297mirror_clear(struct gctl_req *req)
298{
299	const char *name;
300	int error, i, nargs;
301
302	nargs = gctl_get_int(req, "nargs");
303	if (nargs < 1) {
304		gctl_error(req, "Too few arguments.");
305		return;
306	}
307
308	for (i = 0; i < nargs; i++) {
309		name = gctl_get_ascii(req, "arg%d", i);
310		error = g_metadata_clear(name, G_MIRROR_MAGIC);
311		if (error != 0) {
312			fprintf(stderr, "Can't clear metadata on %s: %s.\n",
313			    name, strerror(error));
314			gctl_error(req, "Not fully done.");
315			continue;
316		}
317		if (verbose)
318			printf("Metadata cleared on %s.\n", name);
319	}
320}
321
322static void
323mirror_dump(struct gctl_req *req)
324{
325	struct g_mirror_metadata md, tmpmd;
326	const char *name;
327	int error, i, nargs;
328
329	nargs = gctl_get_int(req, "nargs");
330	if (nargs < 1) {
331		gctl_error(req, "Too few arguments.");
332		return;
333	}
334
335	for (i = 0; i < nargs; i++) {
336		name = gctl_get_ascii(req, "arg%d", i);
337		error = g_metadata_read(name, (u_char *)&tmpmd, sizeof(tmpmd),
338		    G_MIRROR_MAGIC);
339		if (error != 0) {
340			fprintf(stderr, "Can't read metadata from %s: %s.\n",
341			    name, strerror(error));
342			gctl_error(req, "Not fully done.");
343			continue;
344		}
345		if (mirror_metadata_decode((u_char *)&tmpmd, &md) != 0) {
346			fprintf(stderr, "MD5 hash mismatch for %s, skipping.\n",
347			    name);
348			gctl_error(req, "Not fully done.");
349			continue;
350		}
351		printf("Metadata on %s:\n", name);
352		mirror_metadata_dump(&md);
353		printf("\n");
354	}
355}
356
357static void
358mirror_activate(struct gctl_req *req)
359{
360	struct g_mirror_metadata md, tmpmd;
361	const char *name, *path;
362	int error, i, nargs;
363
364	nargs = gctl_get_int(req, "nargs");
365	if (nargs < 2) {
366		gctl_error(req, "Too few arguments.");
367		return;
368	}
369	name = gctl_get_ascii(req, "arg0");
370
371	for (i = 1; i < nargs; i++) {
372		path = gctl_get_ascii(req, "arg%d", i);
373		error = g_metadata_read(path, (u_char *)&tmpmd, sizeof(tmpmd),
374		    G_MIRROR_MAGIC);
375		if (error != 0) {
376			fprintf(stderr, "Cannot read metadata from %s: %s.\n",
377			    path, strerror(error));
378			gctl_error(req, "Not fully done.");
379			continue;
380		}
381		if (mirror_metadata_decode((u_char *)&tmpmd, &md) != 0) {
382			fprintf(stderr,
383			    "MD5 hash mismatch for provider %s, skipping.\n",
384			    path);
385			gctl_error(req, "Not fully done.");
386			continue;
387		}
388		if (strcmp(md.md_name, name) != 0) {
389			fprintf(stderr,
390			    "Provider %s is not the mirror %s component.\n",
391			    path, name);
392			gctl_error(req, "Not fully done.");
393			continue;
394		}
395		md.md_dflags &= ~G_MIRROR_DISK_FLAG_INACTIVE;
396		mirror_metadata_encode(&md, (u_char *)&tmpmd);
397		error = g_metadata_store(path, (u_char *)&tmpmd, sizeof(tmpmd));
398		if (error != 0) {
399			fprintf(stderr, "Cannot write metadata from %s: %s.\n",
400			    path, strerror(error));
401			gctl_error(req, "Not fully done.");
402			continue;
403		}
404		if (verbose)
405			printf("Provider %s activated.\n", path);
406	}
407}
408
409static struct gclass *
410find_class(struct gmesh *mesh, const char *name)
411{
412	struct gclass *classp;
413
414	LIST_FOREACH(classp, &mesh->lg_class, lg_class) {
415		if (strcmp(classp->lg_name, name) == 0)
416			return (classp);
417	}
418	return (NULL);
419}
420
421static struct ggeom *
422find_geom(struct gclass *classp, const char *name)
423{
424	struct ggeom *gp;
425
426	LIST_FOREACH(gp, &classp->lg_geom, lg_geom) {
427		if (strcmp(gp->lg_name, name) == 0)
428			return (gp);
429	}
430	return (NULL);
431}
432
433static void
434mirror_resize(struct gctl_req *req, unsigned flags __unused)
435{
436	struct gmesh mesh;
437	struct gclass *classp;
438	struct ggeom *gp;
439	struct gprovider *pp;
440	struct gconsumer *cp;
441	off_t size;
442	int error, nargs;
443	const char *name;
444	char ssize[30];
445
446	nargs = gctl_get_int(req, "nargs");
447	if (nargs < 1) {
448		gctl_error(req, "Too few arguments.");
449		return;
450	}
451	error = geom_gettree(&mesh);
452	if (error)
453		errc(EXIT_FAILURE, error, "Cannot get GEOM tree");
454	name = gctl_get_ascii(req, "class");
455	if (name == NULL)
456		abort();
457	classp = find_class(&mesh, name);
458	if (classp == NULL)
459		errx(EXIT_FAILURE, "Class %s not found.", name);
460	name = gctl_get_ascii(req, "arg0");
461	if (name == NULL)
462		abort();
463	gp = find_geom(classp, name);
464	if (gp == NULL)
465		errx(EXIT_FAILURE, "No such geom: %s.", name);
466	pp = LIST_FIRST(&gp->lg_provider);
467	if (pp == NULL)
468		errx(EXIT_FAILURE, "Provider of geom %s not found.", name);
469	size = pp->lg_mediasize;
470	name = gctl_get_ascii(req, "size");
471	if (name == NULL)
472		errx(EXIT_FAILURE, "The size is not specified.");
473	if (*name == '*') {
474#define	CSZ(c)	((c)->lg_provider->lg_mediasize - \
475    (c)->lg_provider->lg_sectorsize)
476		/* Find the maximum possible size */
477		LIST_FOREACH(cp, &gp->lg_consumer, lg_consumer) {
478			if (CSZ(cp) > size)
479				size = CSZ(cp);
480		}
481		LIST_FOREACH(cp, &gp->lg_consumer, lg_consumer) {
482			if (CSZ(cp) < size)
483				size = CSZ(cp);
484		}
485#undef CSZ
486		if (size == pp->lg_mediasize)
487			errx(EXIT_FAILURE,
488			    "Cannot expand provider %s\n",
489			    pp->lg_name);
490	} else {
491		error = g_parse_lba(name, pp->lg_sectorsize, &size);
492		if (error)
493			errc(EXIT_FAILURE, error, "Invalid size param");
494		size *= pp->lg_sectorsize;
495	}
496	snprintf(ssize, sizeof(ssize), "%ju", (uintmax_t)size);
497	gctl_change_param(req, "size", -1, ssize);
498	geom_deletetree(&mesh);
499	gctl_issue(req);
500}
501