ccdconfig.c revision 109417 
1/*	$NetBSD: ccdconfig.c,v 1.2.2.1 1995/11/11 02:43:35 thorpej Exp $	*/
2
3/*
4 * Copyright (c) 1995 Jason R. Thorpe.
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 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *	This product includes software developed for the NetBSD Project
18 *	by Jason R. Thorpe.
19 * 4. The name of the author may not be used to endorse or promote products
20 *    derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#ifndef lint
36static const char rcsid[] =
37  "$FreeBSD: head/sbin/ccdconfig/ccdconfig.c 109417 2003-01-17 13:23:41Z phk $";
38#endif /* not lint */
39
40#include <sys/param.h>
41#include <sys/linker.h>
42#include <sys/disklabel.h>
43#include <sys/stat.h>
44#include <sys/module.h>
45#include <ctype.h>
46#include <err.h>
47#include <errno.h>
48#include <fcntl.h>
49#include <limits.h>
50#include <paths.h>
51#include <stdio.h>
52#include <stdlib.h>
53#include <string.h>
54#include <unistd.h>
55
56#include <sys/devicestat.h>
57#include <sys/ccdvar.h>
58
59#include "pathnames.h"
60
61static	int lineno = 0;
62static	int verbose = 0;
63static	const char *ccdconf = _PATH_CCDCONF;
64
65struct	flagval {
66	const char	*fv_flag;
67	int	fv_val;
68} flagvaltab[] = {
69	{ "CCDF_UNIFORM",	CCDF_UNIFORM },
70	{ "CCDF_MIRROR",	CCDF_MIRROR },
71	{ NULL,			0 },
72};
73
74#define CCD_CONFIG		0	/* configure a device */
75#define CCD_CONFIGALL		1	/* configure all devices */
76#define CCD_UNCONFIG		2	/* unconfigure a device */
77#define CCD_UNCONFIGALL		3	/* unconfigure all devices */
78#define CCD_DUMP		4	/* dump a ccd's configuration */
79
80static	int checkdev(char *);
81static	int do_io(int, u_long, struct ccd_ioctl *);
82static	int do_single(int, char **, int);
83static	int do_all(int);
84static	int dump_ccd(int, char **);
85static	int flags_to_val(char *);
86static	void print_ccd_info(struct ccd_s *);
87static	int resolve_ccdname(char *);
88static	void usage(void);
89
90int
91main(int argc, char *argv[])
92{
93	int ch, options = 0, action = CCD_CONFIG;
94
95	while ((ch = getopt(argc, argv, "cCf:guUv")) != -1) {
96		switch (ch) {
97		case 'c':
98			action = CCD_CONFIG;
99			++options;
100			break;
101
102		case 'C':
103			action = CCD_CONFIGALL;
104			++options;
105			break;
106
107		case 'f':
108			ccdconf = optarg;
109			break;
110
111		case 'g':
112			action = CCD_DUMP;
113			break;
114
115		case 'u':
116			action = CCD_UNCONFIG;
117			++options;
118			break;
119
120		case 'U':
121			action = CCD_UNCONFIGALL;
122			++options;
123			break;
124
125		case 'v':
126			verbose = 1;
127			break;
128
129		default:
130			usage();
131		}
132	}
133	argc -= optind;
134	argv += optind;
135
136	if (options > 1)
137		usage();
138
139	if (modfind("ccd") < 0) {
140		/* Not present in kernel, try loading it */
141		if (kldload("ccd") < 0 || modfind("ccd") < 0)
142			warn("ccd module not available!");
143	}
144
145	switch (action) {
146		case CCD_CONFIG:
147		case CCD_UNCONFIG:
148			exit(do_single(argc, argv, action));
149			/* NOTREACHED */
150
151		case CCD_CONFIGALL:
152		case CCD_UNCONFIGALL:
153			exit(do_all(action));
154			/* NOTREACHED */
155
156		case CCD_DUMP:
157			exit(dump_ccd(argc, argv));
158			/* NOTREACHED */
159	}
160	/* NOTREACHED */
161	return (0);
162}
163
164static int
165do_single(int argc, char **argv, int action)
166{
167	struct ccd_ioctl ccio;
168	char *cp, *cp2, **disks;
169	int ccd, noflags = 0, i, ileave, flags = 0, j;
170	u_int u;
171
172	bzero(&ccio, sizeof(ccio));
173
174	/*
175	 * If unconfiguring, all arguments are treated as ccds.
176	 */
177	if (action == CCD_UNCONFIG || action == CCD_UNCONFIGALL) {
178		for (i = 0; argc != 0; ) {
179			cp = *argv++; --argc;
180			if ((ccd = resolve_ccdname(cp)) == NULL) {
181				warnx("invalid ccd name: %s", cp);
182				i = 1;
183				continue;
184			}
185			if (do_io(ccd, CCDIOCCLR, &ccio))
186				i = 1;
187			else
188				if (verbose)
189					printf("%s unconfigured\n", cp);
190		}
191		return (i);
192	}
193
194	/* Make sure there are enough arguments. */
195	if (argc < 4) {
196		if (argc == 3) {
197			/* Assume that no flags are specified. */
198			noflags = 1;
199		} else {
200			if (action == CCD_CONFIGALL) {
201				warnx("%s: bad line: %d", ccdconf, lineno);
202				return (1);
203			} else
204				usage();
205		}
206	}
207
208	/* First argument is the ccd to configure. */
209	cp = *argv++; --argc;
210	if ((ccd = resolve_ccdname(cp)) == NULL) {
211		warnx("invalid ccd name: %s", cp);
212		return (1);
213	}
214
215	/* Next argument is the interleave factor. */
216	cp = *argv++; --argc;
217	errno = 0;	/* to check for ERANGE */
218	ileave = (int)strtol(cp, &cp2, 10);
219	if ((errno == ERANGE) || (ileave < 0) || (*cp2 != '\0')) {
220		warnx("invalid interleave factor: %s", cp);
221		return (1);
222	}
223
224	if (noflags == 0) {
225		/* Next argument is the ccd configuration flags. */
226		cp = *argv++; --argc;
227		if ((flags = flags_to_val(cp)) < 0) {
228			warnx("invalid flags argument: %s", cp);
229			return (1);
230		}
231	}
232
233	/* Next is the list of disks to make the ccd from. */
234	disks = malloc(argc * sizeof(char *));
235	if (disks == NULL) {
236		warnx("no memory to configure ccd");
237		return (1);
238	}
239	for (i = 0; argc != 0; ) {
240		cp = *argv++; --argc;
241		if ((j = checkdev(cp)) == 0)
242			disks[i++] = cp;
243		else {
244			warnx("%s: %s", cp, strerror(j));
245			return (1);
246		}
247	}
248
249	/* Fill in the ccio. */
250	ccio.ccio_disks = disks;
251	ccio.ccio_ndisks = i;
252	ccio.ccio_ileave = ileave;
253	ccio.ccio_flags = flags;
254
255	if (do_io(ccd, CCDIOCSET, &ccio)) {
256		free(disks);
257		return (1);
258	}
259
260	if (verbose) {
261		printf("ccd%d: %d components ", ccio.ccio_unit,
262		    ccio.ccio_ndisks);
263		for (u = 0; u < ccio.ccio_ndisks; ++u) {
264			if ((cp2 = strrchr(disks[u], '/')) != NULL)
265				++cp2;
266			else
267				cp2 = disks[u];
268			printf("%c%s%c",
269			    u == 0 ? '(' : ' ', cp2,
270			    u == ccio.ccio_ndisks - 1 ? ')' : ',');
271		}
272		printf(", %lu blocks ", (u_long)ccio.ccio_size);
273		if (ccio.ccio_ileave != 0)
274			printf("interleaved at %d blocks\n", ccio.ccio_ileave);
275		else
276			printf("concatenated\n");
277	}
278
279	free(disks);
280	return (0);
281}
282
283static int
284do_all(int action)
285{
286	FILE *f;
287	char line[_POSIX2_LINE_MAX];
288	char *cp, **argv;
289	int argc, rval;
290	gid_t egid;
291
292	rval = 0;
293	egid = getegid();
294	setegid(getgid());
295	if ((f = fopen(ccdconf, "r")) == NULL) {
296		setegid(egid);
297		warn("fopen: %s", ccdconf);
298		return (1);
299	}
300	setegid(egid);
301
302	while (fgets(line, sizeof(line), f) != NULL) {
303		argc = 0;
304		argv = NULL;
305		++lineno;
306		if ((cp = strrchr(line, '\n')) != NULL)
307			*cp = '\0';
308
309		/* Break up the line and pass it's contents to do_single(). */
310		if (line[0] == '\0')
311			goto end_of_line;
312		for (cp = line; (cp = strtok(cp, " \t")) != NULL; cp = NULL) {
313			if (*cp == '#')
314				break;
315			if ((argv = realloc(argv,
316			    sizeof(char *) * ++argc)) == NULL) {
317				warnx("no memory to configure ccds");
318				return (1);
319			}
320			argv[argc - 1] = cp;
321			/*
322			 * If our action is to unconfigure all, then pass
323			 * just the first token to do_single() and ignore
324			 * the rest.  Since this will be encountered on
325			 * our first pass through the line, the Right
326			 * Thing will happen.
327			 */
328			if (action == CCD_UNCONFIGALL) {
329				if (do_single(argc, argv, action))
330					rval = 1;
331				goto end_of_line;
332			}
333		}
334		if (argc != 0)
335			if (do_single(argc, argv, action))
336				rval = 1;
337
338 end_of_line:
339		if (argv != NULL)
340			free(argv);
341	}
342
343	(void)fclose(f);
344	return (rval);
345}
346
347static int
348checkdev(char *path)
349{
350	struct stat st;
351
352	if (stat(path, &st) != 0)
353		return (errno);
354
355	if (!S_ISBLK(st.st_mode) && !S_ISCHR(st.st_mode))
356		return (EINVAL);
357
358	return (0);
359}
360
361static int
362resolve_ccdname(char *name)
363{
364
365	if (!strncmp(name, _PATH_DEV, strlen(_PATH_DEV)))
366		name += strlen(_PATH_DEV);
367	if (strncmp(name, "ccd", 3))
368		return -1;
369	name += 3;
370	if (!isdigit(*name))
371		return -1;
372	return (strtoul(name, NULL, 10));
373}
374
375static int
376do_io(int unit, u_long cmd, struct ccd_ioctl *cciop)
377{
378	int fd;
379	char *cp;
380	char *path;
381
382	asprintf(&path, "%sccd%dc", _PATH_DEV, unit);
383
384	if ((fd = open(path, O_RDWR, 0640)) < 0) {
385		warn("open: %s", path);
386		return (1);
387	}
388
389	if (ioctl(fd, cmd, cciop) < 0) {
390		switch (cmd) {
391		case CCDIOCSET:
392			cp = "CCDIOCSET";
393			break;
394
395		case CCDIOCCLR:
396			cp = "CCDIOCCLR";
397			break;
398
399		case CCDCONFINFO:
400			cp = "CCDCONFINFO";
401			break;
402
403		case CCDCPPINFO:
404			cp = "CCDCPPINFO";
405			break;
406
407		default:
408			cp = "unknown";
409		}
410		warn("ioctl (%s): %s", cp, path);
411		return (1);
412	}
413
414	return (0);
415}
416
417static int
418dump_ccd(int argc, char **argv)
419{
420	char *cp;
421	int i, error, numccd, numconfiged = 0;
422	struct ccdconf conf;
423	int ccd;
424
425	/*
426	 * Read the ccd configuration data from the kernel and dump
427	 * it to stdout.
428	 */
429	if ((ccd = resolve_ccdname("ccd0")) < 0) {		/* XXX */
430		warnx("invalid ccd name: %s", cp);
431		return (1);
432	}
433	conf.size = 0;
434	if (do_io(ccd, CCDCONFINFO, (struct ccd_ioctl *) &conf))
435		return (1);
436	if (conf.size == 0) {
437		printf("no concatenated disks configured\n");
438		return (0);
439	}
440	/* Allocate space for the configuration data. */
441	conf.buffer = alloca(conf.size);
442	if (conf.buffer == NULL) {
443		warnx("no memory for configuration data");
444		return (1);
445	}
446	if (do_io(ccd, CCDCONFINFO, (struct ccd_ioctl *) &conf))
447		return (1);
448
449	numconfiged = conf.size / sizeof(struct ccd_s);
450
451	if (argc == 0) {
452		for (i = 0; i < numconfiged; i++)
453			print_ccd_info(&(conf.buffer[i]));
454	} else {
455		while (argc) {
456			cp = *argv++; --argc;
457			if ((ccd = resolve_ccdname(cp)) < 0) {
458				warnx("invalid ccd name: %s", cp);
459				continue;
460			}
461			error = 1;
462			for (i = 0; i < numconfiged; i++) {
463				if (conf.buffer[i].sc_unit == ccd) {
464					print_ccd_info(&(conf.buffer[i]));
465					error = 0;
466					break;
467				}
468			}
469			if (error) {
470				warnx("ccd%d not configured", numccd);
471				continue;
472			}
473		}
474	}
475
476	return (0);
477}
478
479static void
480print_ccd_info(struct ccd_s *cs)
481{
482	char *cp;
483	static int header_printed = 0;
484	struct ccdcpps cpps;
485	int ccd;
486
487	/* Print out header if necessary*/
488	if (header_printed == 0 && verbose) {
489		printf("# ccd\t\tileave\tflags\tcompnent devices\n");
490		header_printed = 1;
491	}
492
493	/* Dump out softc information. */
494	printf("ccd%d\t\t%d\t%d\t", cs->sc_unit, cs->sc_ileave,
495	    cs->sc_cflags & CCDF_USERMASK);
496	fflush(stdout);
497
498	/* Read in the component info. */
499	asprintf(&cp, "%s%d", cs->device_stats.device_name,
500	    cs->device_stats.unit_number);
501	if (cp == NULL) {
502		printf("\n");
503		warn("ccd%d: can't allocate memory",
504		    cs->sc_unit);
505		return;
506	}
507
508	if ((ccd = resolve_ccdname(cp)) < 0) {
509		printf("\n");
510		warnx("can't read component info: invalid ccd name: %s", cp);
511		return;
512	}
513	cpps.size = 0;
514	if (do_io(ccd, CCDCPPINFO, (struct ccd_ioctl *) &cpps)) {
515		printf("\n");
516		warnx("can't read component info");
517		return;
518	}
519	cpps.buffer = alloca(cpps.size);
520	if (cpps.buffer == NULL) {
521		printf("\n");
522		warn("ccd%d: can't allocate memory for component info",
523		    cs->sc_unit);
524		return;
525	}
526	if (do_io(ccd, CCDCPPINFO, (struct ccd_ioctl *) &cpps)) {
527		printf("\n");
528		warnx("can't read component info");
529		return;
530	}
531
532	/* Display component info. */
533	for (cp = cpps.buffer; cp - cpps.buffer < cpps.size; cp += strlen(cp) + 1) {
534		printf((cp + strlen(cp) + 1) < (cpps.buffer + cpps.size) ?
535		    "%s " : "%s\n", cp);
536		fflush(stdout);
537	}
538	return;
539}
540
541static int
542flags_to_val(char *flags)
543{
544	char *cp, *tok;
545	int i, tmp, val = ~CCDF_USERMASK;
546	size_t flagslen;
547
548	/*
549	 * The most common case is that of NIL flags, so check for
550	 * those first.
551	 */
552	if (strcmp("none", flags) == 0 || strcmp("0x0", flags) == 0 ||
553	    strcmp("0", flags) == 0)
554		return (0);
555
556	flagslen = strlen(flags);
557
558	/* Check for values represented by strings. */
559	if ((cp = strdup(flags)) == NULL)
560		err(1, "no memory to parse flags");
561	tmp = 0;
562	for (tok = cp; (tok = strtok(tok, ",")) != NULL; tok = NULL) {
563		for (i = 0; flagvaltab[i].fv_flag != NULL; ++i)
564			if (strcmp(tok, flagvaltab[i].fv_flag) == 0)
565				break;
566		if (flagvaltab[i].fv_flag == NULL) {
567			free(cp);
568			goto bad_string;
569		}
570		tmp |= flagvaltab[i].fv_val;
571	}
572
573	/* If we get here, the string was ok. */
574	free(cp);
575	val = tmp;
576	goto out;
577
578 bad_string:
579
580	/* Check for values represented in hex. */
581	if (flagslen > 2 && flags[0] == '0' && flags[1] == 'x') {
582		errno = 0;	/* to check for ERANGE */
583		val = (int)strtol(&flags[2], &cp, 16);
584		if ((errno == ERANGE) || (*cp != '\0'))
585			return (-1);
586		goto out;
587	}
588
589	/* Check for values represented in decimal. */
590	errno = 0;	/* to check for ERANGE */
591	val = (int)strtol(flags, &cp, 10);
592	if ((errno == ERANGE) || (*cp != '\0'))
593		return (-1);
594
595 out:
596	return (((val & ~CCDF_USERMASK) == 0) ? val : -1);
597}
598
599static void
600usage(void)
601{
602	fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n",
603		"usage: ccdconfig [-cv] ccd ileave [flags] dev [...]",
604		"       ccdconfig -C [-v] [-f config_file]",
605		"       ccdconfig -u [-v] ccd [...]",
606		"       ccdconfig -U [-v] [-f config_file]",
607		"       ccdconfig -g [ccd [...]]");
608	exit(1);
609}
610
611/* Local Variables: */
612/* c-argdecl-indent: 8 */
613/* c-indent-level: 8 */
614/* End: */
615