geom_part.c revision 179854 
1/*-
2 * Copyright (c) 2007, 2008 Marcel Moolenaar
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: head/sbin/geom/class/part/geom_part.c 179854 2008-06-18 01:46:32Z marcel $");
29
30#include <stdio.h>
31#include <stdint.h>
32#include <stdlib.h>
33#include <unistd.h>
34#include <err.h>
35#include <fcntl.h>
36#include <string.h>
37#include <strings.h>
38#include <libgeom.h>
39#include <paths.h>
40#include <errno.h>
41#include <assert.h>
42#include <sys/stat.h>
43
44#include "core/geom.h"
45#include "misc/subr.h"
46
47#ifdef STATIC_GEOM_CLASSES
48#define	PUBSYM(x)	gpart_##x
49#else
50#define	PUBSYM(x)	x
51#endif
52
53uint32_t PUBSYM(lib_version) = G_LIB_VERSION;
54uint32_t PUBSYM(version) = 0;
55
56static char optional[] = "";
57static char flags[] = "C";
58
59static char bootcode_param[] = "bootcode";
60static char index_param[] = "index";
61static char partcode_param[] = "partcode";
62
63static void gpart_bootcode(struct gctl_req *, unsigned int);
64static void gpart_show(struct gctl_req *, unsigned int);
65
66struct g_command PUBSYM(class_commands)[] = {
67	{ "add", 0, NULL, {
68		{ 'b', "start", NULL, G_TYPE_STRING },
69		{ 's', "size", NULL, G_TYPE_STRING },
70		{ 't', "type", NULL, G_TYPE_STRING },
71		{ 'i', index_param, optional, G_TYPE_STRING },
72		{ 'l', "label", optional, G_TYPE_STRING },
73		{ 'f', "flags", flags, G_TYPE_STRING },
74		G_OPT_SENTINEL },
75	  "geom", NULL
76	},
77	{ "bootcode", 0, gpart_bootcode, {
78		{ 'b', bootcode_param, optional, G_TYPE_STRING },
79		{ 'p', partcode_param, optional, G_TYPE_STRING },
80		{ 'i', index_param, optional, G_TYPE_STRING },
81		{ 'f', "flags", flags, G_TYPE_STRING },
82		G_OPT_SENTINEL },
83	  "geom", NULL
84	},
85	{ "commit", 0, NULL, G_NULL_OPTS, "geom", NULL },
86	{ "create", 0, NULL, {
87		{ 's', "scheme", NULL, G_TYPE_STRING },
88		{ 'n', "entries", optional, G_TYPE_STRING },
89		{ 'f', "flags", flags, G_TYPE_STRING },
90		G_OPT_SENTINEL },
91	  "provider", NULL
92	},
93	{ "delete", 0, NULL, {
94		{ 'i', index_param, NULL, G_TYPE_STRING },
95		{ 'f', "flags", flags, G_TYPE_STRING },
96		G_OPT_SENTINEL },
97	  "geom", NULL
98	},
99	{ "destroy", 0, NULL, {
100		{ 'f', "flags", flags, G_TYPE_STRING },
101		G_OPT_SENTINEL },
102	  "geom", NULL },
103	{ "modify", 0, NULL, {
104		{ 'i', index_param, NULL, G_TYPE_STRING },
105		{ 'l', "label", optional, G_TYPE_STRING },
106		{ 't', "type", optional, G_TYPE_STRING },
107		{ 'f', "flags", flags, G_TYPE_STRING },
108		G_OPT_SENTINEL },
109	  "geom", NULL
110	},
111	{ "set", 0, NULL, {
112		{ 'a', "attrib", NULL, G_TYPE_STRING },
113		{ 'i', index_param, NULL, G_TYPE_STRING },
114		{ 'f', "flags", flags, G_TYPE_STRING },
115		G_OPT_SENTINEL },
116	  "geom", NULL
117	},
118	{ "show", 0, gpart_show, {
119		{ 'l', "show_label", NULL, G_TYPE_BOOL },
120		{ 'r', "show_rawtype", NULL, G_TYPE_BOOL },
121		G_OPT_SENTINEL },
122	  NULL, "[-lr] [geom ...]"
123	},
124	{ "undo", 0, NULL, G_NULL_OPTS, "geom", NULL },
125	{ "unset", 0, NULL, {
126		{ 'a', "attrib", NULL, G_TYPE_STRING },
127		{ 'i', index_param, NULL, G_TYPE_STRING },
128		{ 'f', "flags", flags, G_TYPE_STRING },
129		G_OPT_SENTINEL },
130	  "geom", NULL
131        },
132	G_CMD_SENTINEL
133};
134
135static struct gclass *
136find_class(struct gmesh *mesh, const char *name)
137{
138	struct gclass *classp;
139
140	LIST_FOREACH(classp, &mesh->lg_class, lg_class) {
141		if (strcmp(classp->lg_name, name) == 0)
142			return (classp);
143	}
144	return (NULL);
145}
146
147static struct ggeom *
148find_geom(struct gclass *classp, const char *name)
149{
150	struct ggeom *gp;
151
152	LIST_FOREACH(gp, &classp->lg_geom, lg_geom) {
153		if (strcmp(gp->lg_name, name) == 0)
154			return (gp);
155	}
156	return (NULL);
157}
158
159static const char *
160find_geomcfg(struct ggeom *gp, const char *cfg)
161{
162	struct gconfig *gc;
163
164	LIST_FOREACH(gc, &gp->lg_config, lg_config) {
165		if (!strcmp(gc->lg_name, cfg))
166			return (gc->lg_val);
167	}
168	return (NULL);
169}
170
171static const char *
172find_provcfg(struct gprovider *pp, const char *cfg)
173{
174	struct gconfig *gc;
175
176	LIST_FOREACH(gc, &pp->lg_config, lg_config) {
177		if (!strcmp(gc->lg_name, cfg))
178			return (gc->lg_val);
179	}
180	return (NULL);
181}
182
183static struct gprovider *
184find_provider(struct ggeom *gp, unsigned long long minsector)
185{
186	struct gprovider *pp, *bestpp;
187	unsigned long long offset;
188	unsigned long long sector, bestsector;
189
190	bestpp = NULL;
191	LIST_FOREACH(pp, &gp->lg_provider, lg_provider) {
192		offset = atoll(find_provcfg(pp, "offset"));
193		sector = offset / pp->lg_sectorsize;
194		if (sector < minsector)
195			continue;
196		if (bestpp != NULL && sector >= bestsector)
197			continue;
198		bestpp = pp;
199		bestsector = sector;
200	}
201	return (bestpp);
202}
203
204static const char *
205fmtsize(long double rawsz)
206{
207	static char buf[32];
208	static const char *sfx[] = { "B", "KB", "MB", "GB", "TB" };
209	long double sz;
210	int sfxidx;
211
212	sfxidx = 0;
213	sz = (long double)rawsz;
214	while (sfxidx < 4 && sz > 1099.0) {
215		sz /= 1000;
216		sfxidx++;
217	}
218
219	sprintf(buf, "%.1Lf%s", sz, sfx[sfxidx]);
220	return (buf);
221}
222
223static const char *
224fmtattrib(struct gprovider *pp)
225{
226	static char buf[64];
227	const char *val;
228
229	val = find_provcfg(pp, "attrib");
230	if (val == NULL)
231		return ("");
232	snprintf(buf, sizeof(buf), " [%s] ", val);
233	return (buf);
234}
235
236static void
237gpart_show_geom(struct ggeom *gp, const char *element)
238{
239	struct gprovider *pp;
240	const char *s, *scheme;
241	unsigned long long first, last, sector, end;
242	unsigned long long offset, length, secsz;
243	int idx, wblocks, wname;
244
245	scheme = find_geomcfg(gp, "scheme");
246	s = find_geomcfg(gp, "first");
247	first = atoll(s);
248	s = find_geomcfg(gp, "last");
249	last = atoll(s);
250	wblocks = strlen(s);
251	wname = strlen(gp->lg_name);
252	pp = LIST_FIRST(&gp->lg_consumer)->lg_provider;
253	secsz = pp->lg_sectorsize;
254	printf("=>%*llu  %*llu  %*s  %s  (%s)\n",
255	    wblocks, first, wblocks, (last - first + 1),
256	    wname, gp->lg_name,
257	    scheme, fmtsize(pp->lg_mediasize));
258
259	while ((pp = find_provider(gp, first)) != NULL) {
260		s = find_provcfg(pp, "offset");
261		offset = atoll(s);
262		sector = offset / secsz;
263		s = find_provcfg(pp, "length");
264		length = atoll(s);
265		s = find_provcfg(pp, "index");
266		idx = atoi(s);
267		end = sector + length / secsz;
268		if (first < sector) {
269			printf("  %*llu  %*llu  %*s  - free -  (%s)\n",
270			    wblocks, first, wblocks, sector - first,
271			    wname, "",
272			    fmtsize((sector - first) * secsz));
273		}
274		printf("  %*llu  %*llu  %*d  %s %s (%s)\n",
275		    wblocks, sector, wblocks, end - sector,
276		    wname, idx, find_provcfg(pp, element),
277		    fmtattrib(pp), fmtsize(pp->lg_mediasize));
278		first = end;
279	}
280	if (first <= last) {
281		printf("  %*llu  %*llu  %*s  - free -  (%s)\n",
282		    wblocks, first, wblocks, last - first + 1,
283		    wname, "",
284		    fmtsize((last - first + 1) * secsz));
285	}
286	printf("\n");
287}
288
289static int
290gpart_show_hasopt(struct gctl_req *req, const char *opt, const char *elt)
291{
292
293	if (!gctl_get_int(req, opt))
294		return (0);
295
296	if (elt != NULL)
297		errx(EXIT_FAILURE, "-l and -r are mutually exclusive");
298
299	return (1);
300}
301
302static void
303gpart_show(struct gctl_req *req, unsigned int fl __unused)
304{
305	struct gmesh mesh;
306	struct gclass *classp;
307	struct ggeom *gp;
308	const char *element, *name;
309	int error, i, nargs;
310
311	element = NULL;
312	if (gpart_show_hasopt(req, "show_label", element))
313		element = "label";
314	if (gpart_show_hasopt(req, "show_rawtype", element))
315		element = "rawtype";
316	if (element == NULL)
317		element = "type";
318
319	name = gctl_get_ascii(req, "class");
320	if (name == NULL)
321		abort();
322	error = geom_gettree(&mesh);
323	if (error != 0)
324		errc(EXIT_FAILURE, error, "Cannot get GEOM tree");
325	classp = find_class(&mesh, name);
326	if (classp == NULL) {
327		geom_deletetree(&mesh);
328		errx(EXIT_FAILURE, "Class %s not found.", name);
329	}
330	nargs = gctl_get_int(req, "nargs");
331	if (nargs > 0) {
332		for (i = 0; i < nargs; i++) {
333			name = gctl_get_ascii(req, "arg%d", i);
334			gp = find_geom(classp, name);
335			if (gp != NULL)
336				gpart_show_geom(gp, element);
337			else
338				errx(EXIT_FAILURE, "No such geom: %s.", name);
339		}
340	} else {
341		LIST_FOREACH(gp, &classp->lg_geom, lg_geom) {
342			gpart_show_geom(gp, element);
343		}
344	}
345	geom_deletetree(&mesh);
346}
347
348static void *
349gpart_bootfile_read(const char *bootfile, ssize_t *size)
350{
351	struct stat sb;
352	void *code;
353	int fd;
354
355	if (stat(bootfile, &sb) == -1)
356		err(EXIT_FAILURE, "%s", bootfile);
357	if (!S_ISREG(sb.st_mode))
358		errx(EXIT_FAILURE, "%s: not a regular file", bootfile);
359	if (sb.st_size == 0)
360		errx(EXIT_FAILURE, "%s: empty file", bootfile);
361	if (*size > 0 && sb.st_size >= *size)
362		errx(EXIT_FAILURE, "%s: file too big (%zu limit)", bootfile,
363		    *size);
364
365	*size = sb.st_size;
366
367	fd = open(bootfile, O_RDONLY);
368	if (fd == -1)
369		err(EXIT_FAILURE, "%s", bootfile);
370	code = malloc(*size);
371	if (code == NULL)
372		err(EXIT_FAILURE, NULL);
373	if (read(fd, code, *size) != *size)
374		err(EXIT_FAILURE, "%s", bootfile);
375	close(fd);
376
377	return (code);
378}
379
380static void
381gpart_write_partcode(struct gctl_req *req, int idx, void *code, ssize_t size)
382{
383	char dsf[128];
384	struct gmesh mesh;
385	struct gclass *classp;
386	struct ggeom *gp;
387	struct gprovider *pp;
388	const char *s;
389	int error, fd;
390
391	s = gctl_get_ascii(req, "class");
392	if (s == NULL)
393		abort();
394	error = geom_gettree(&mesh);
395	if (error != 0)
396		errc(EXIT_FAILURE, error, "Cannot get GEOM tree");
397	classp = find_class(&mesh, s);
398	if (classp == NULL) {
399		geom_deletetree(&mesh);
400		errx(EXIT_FAILURE, "Class %s not found.", s);
401	}
402	s = gctl_get_ascii(req, "geom");
403	gp = find_geom(classp, s);
404	if (gp == NULL)
405		errx(EXIT_FAILURE, "No such geom: %s.", s);
406
407	LIST_FOREACH(pp, &gp->lg_provider, lg_provider) {
408		s = find_provcfg(pp, "index");
409		if (s == NULL)
410			continue;
411		if (atoi(s) == idx)
412			break;
413	}
414
415	if (pp != NULL) {
416		snprintf(dsf, sizeof(dsf), "/dev/%s", pp->lg_name);
417		fd = open(dsf, O_WRONLY);
418		if (fd == -1)
419			err(EXIT_FAILURE, "%s", dsf);
420		if (lseek(fd, size, SEEK_SET) != size)
421			errx(EXIT_FAILURE, "%s: not enough space", dsf);
422		if (lseek(fd, 0, SEEK_SET) != 0)
423			err(EXIT_FAILURE, "%s", dsf);
424		if (write(fd, code, size) != size)
425			err(EXIT_FAILURE, "%s", dsf);
426		close(fd);
427	} else
428		errx(EXIT_FAILURE, "invalid partition index");
429
430	geom_deletetree(&mesh);
431}
432
433static void
434gpart_bootcode(struct gctl_req *req, unsigned int fl __unused)
435{
436	const char *s;
437	char *sp;
438	void *bootcode, *partcode;
439	size_t bootsize, partsize;
440	int error, idx;
441
442	if (gctl_has_param(req, bootcode_param)) {
443		s = gctl_get_ascii(req, bootcode_param);
444		bootsize = 64 * 1024;		/* Arbitrary limit. */
445		bootcode = gpart_bootfile_read(s, &bootsize);
446		error = gctl_change_param(req, bootcode_param, bootsize,
447		    bootcode);
448		if (error)
449			errc(EXIT_FAILURE, error, "internal error");
450	} else {
451		bootcode = NULL;
452		bootsize = 0;
453	}
454
455	if (gctl_has_param(req, partcode_param)) {
456		s = gctl_get_ascii(req, partcode_param);
457		partsize = bootsize * 1024;
458		partcode = gpart_bootfile_read(s, &partsize);
459		error = gctl_delete_param(req, partcode_param);
460		if (error)
461			errc(EXIT_FAILURE, error, "internal error");
462	} else {
463		partcode = NULL;
464		partsize = 0;
465	}
466
467	if (gctl_has_param(req, index_param)) {
468		if (partcode == NULL)
469			errx(EXIT_FAILURE, "-i is only valid with -p");
470		s = gctl_get_ascii(req, index_param);
471		idx = strtol(s, &sp, 10);
472		if (idx < 1 || *s == '\0' || *sp != '\0')
473			errx(EXIT_FAILURE, "invalid partition index");
474		error = gctl_delete_param(req, index_param);
475		if (error)
476			errc(EXIT_FAILURE, error, "internal error");
477	} else
478		idx = 0;
479
480	if (partcode != NULL) {
481		if (idx == 0)
482			errx(EXIT_FAILURE, "missing -i option");
483		gpart_write_partcode(req, idx, partcode, partsize);
484	} else {
485		if (bootcode == NULL)
486			errx(EXIT_FAILURE, "no -b nor -p");
487	}
488
489	if (bootcode != NULL) {
490		s = gctl_issue(req);
491		if (s != NULL)
492			errx(EXIT_FAILURE, "%s", s);
493	}
494}
495