2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 2002 Poul-Henning Kamp
5 * Copyright (c) 2002 Networks Associates Technology, Inc.
7 * Copyright (c) 2022 Alexander Motin <mav@FreeBSD.org>
9 * This software was developed for the FreeBSD Project by Poul-Henning Kamp
10 * and NAI Labs, the Security Research Division of Network Associates, Inc.
11 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
12 * DARPA CHATS research program.
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in the
21 * documentation and/or other materials provided with the distribution.
22 * 3. The names of the authors may not be used to endorse or promote
23 * products derived from this software without specific prior written
26 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 #include <sys/cdefs.h>
40 __FBSDID("$FreeBSD$");
42 #include <sys/param.h>
43 #include <sys/systm.h>
45 #include <sys/malloc.h>
49 #include <vm/vm_extern.h>
51 #include <geom/geom.h>
52 #include <geom/geom_int.h>
54 #include <geom/geom_ctl.h>
56 #include <machine/stdarg.h>
58 static d_ioctl_t g_ctl_ioctl;
60 static struct cdevsw g_ctl_cdevsw = {
61 .d_version = D_VERSION,
63 .d_ioctl = g_ctl_ioctl,
67 CTASSERT(GCTL_PARAM_RD == VM_PROT_READ);
68 CTASSERT(GCTL_PARAM_WR == VM_PROT_WRITE);
74 make_dev_credf(MAKEDEV_ETERNAL, &g_ctl_cdevsw, 0, NULL,
75 UID_ROOT, GID_OPERATOR, 0640, PATH_GEOM_CTL);
79 * Report an error back to the user in ascii format. Return nerror
80 * or EINVAL if nerror isn't specified.
83 gctl_error(struct gctl_req *req, const char *fmt, ...)
90 /* We only record the first error */
91 if (sbuf_done(req->serror)) {
95 printf("gctl_error: buffer closed, message discarded.\n");
100 req->nerror = EINVAL;
102 /* If this is the last of several messages, indent it on a new line */
103 if (sbuf_len(req->serror) > 0)
104 sbuf_cat(req->serror, "\n\t");
106 sbuf_vprintf(req->serror, fmt, ap);
108 gctl_post_messages(req);
109 return (req->nerror);
113 * The gctl_error() function will only report a single message.
114 * Commands that handle multiple devices may want to report a
115 * message for each of the devices. The gctl_msg() function
116 * can be called multiple times to post messages. When done
117 * the application must either call gctl_post_messages() or
118 * call gctl_error() to cause the messages to be reported to
119 * the calling process.
122 gctl_msg(struct gctl_req *req, const char *fmt, ...)
128 if (sbuf_done(req->serror)) {
130 printf("gctl_msg: buffer closed, message discarded.\n");
134 /* Put second and later messages indented on a new line */
135 if (sbuf_len(req->serror) > 0)
136 sbuf_cat(req->serror, "\n\t");
138 sbuf_vprintf(req->serror, fmt, ap);
143 * Post the messages to the user.
146 gctl_post_messages(struct gctl_req *req)
149 if (sbuf_done(req->serror)) {
151 printf("gctl_post_messages: message buffer already closed.\n");
155 sbuf_finish(req->serror);
156 if (g_debugflags & G_F_CTLDUMP)
157 printf("gctl %p message(s) \"%s\"\n", req,
158 sbuf_data(req->serror));
162 * Allocate space and copyin() something.
163 * XXX: this should really be a standard function in the kernel.
166 geom_alloc_copyin(struct gctl_req *req, void *uaddr, size_t len)
170 ptr = g_malloc(len, M_WAITOK);
171 req->nerror = copyin(uaddr, ptr, len);
179 gctl_copyin(struct gctl_req *req)
181 struct gctl_req_arg *ap;
185 if (req->narg > GEOM_CTL_ARG_MAX) {
186 gctl_error(req, "too many arguments");
191 ap = geom_alloc_copyin(req, req->arg, req->narg * sizeof(*ap));
193 gctl_error(req, "bad control request");
198 /* Nothing have been copyin()'ed yet */
199 for (i = 0; i < req->narg; i++) {
200 ap[i].flag &= ~(GCTL_PARAM_NAMEKERNEL|GCTL_PARAM_VALUEKERNEL);
201 ap[i].flag &= ~GCTL_PARAM_CHANGED;
205 for (i = 0; i < req->narg; i++) {
206 if (ap[i].nlen < 1 || ap[i].nlen > SPECNAMELEN) {
208 "wrong param name length %d: %d", i, ap[i].nlen);
211 p = geom_alloc_copyin(req, ap[i].name, ap[i].nlen);
214 if (p[ap[i].nlen - 1] != '\0') {
215 gctl_error(req, "unterminated param name");
220 ap[i].flag |= GCTL_PARAM_NAMEKERNEL;
221 if (ap[i].len <= 0) {
222 gctl_error(req, "negative param length");
225 if (ap[i].flag & GCTL_PARAM_RD) {
226 p = geom_alloc_copyin(req, ap[i].value, ap[i].len);
229 if ((ap[i].flag & GCTL_PARAM_ASCII) &&
230 p[ap[i].len - 1] != '\0') {
231 gctl_error(req, "unterminated param value");
236 p = g_malloc(ap[i].len, M_WAITOK | M_ZERO);
239 ap[i].flag |= GCTL_PARAM_VALUEKERNEL;
246 gctl_copyout(struct gctl_req *req)
249 struct gctl_req_arg *ap;
255 for (i = 0; i < req->narg; i++, ap++) {
256 if (!(ap->flag & GCTL_PARAM_CHANGED))
258 error = copyout(ap->kvalue, ap->value, ap->len);
268 gctl_free(struct gctl_req *req)
272 sbuf_delete(req->serror);
273 if (req->arg == NULL)
275 for (i = 0; i < req->narg; i++) {
276 if (req->arg[i].flag & GCTL_PARAM_NAMEKERNEL)
277 g_free(req->arg[i].name);
278 if ((req->arg[i].flag & GCTL_PARAM_VALUEKERNEL) &&
280 g_free(req->arg[i].kvalue);
286 gctl_dump(struct gctl_req *req, const char *what)
288 struct gctl_req_arg *ap;
292 printf("Dump of gctl %s at %p:\n", what, req);
293 if (req->nerror > 0) {
294 printf(" nerror:\t%d\n", req->nerror);
295 if (sbuf_len(req->serror) > 0)
296 printf(" error:\t\"%s\"\n", sbuf_data(req->serror));
298 if (req->arg == NULL)
300 for (i = 0; i < req->narg; i++) {
302 if (!(ap->flag & GCTL_PARAM_NAMEKERNEL))
303 printf(" param:\t%d@%p", ap->nlen, ap->name);
305 printf(" param:\t\"%s\"", ap->name);
306 printf(" [%s%s%d] = ",
307 ap->flag & GCTL_PARAM_RD ? "R" : "",
308 ap->flag & GCTL_PARAM_WR ? "W" : "",
310 if (!(ap->flag & GCTL_PARAM_VALUEKERNEL)) {
311 printf(" =@ %p", ap->value);
312 } else if (ap->flag & GCTL_PARAM_ASCII) {
313 printf("\"%s\"", (char *)ap->kvalue);
314 } else if (ap->len > 0) {
315 for (j = 0; j < ap->len && j < 512; j++)
316 printf(" %02x", ((u_char *)ap->kvalue)[j]);
318 printf(" = %p", ap->kvalue);
325 gctl_set_param(struct gctl_req *req, const char *param, void const *ptr,
329 struct gctl_req_arg *ap;
331 for (i = 0; i < req->narg; i++) {
333 if (strcmp(param, ap->name))
335 if (!(ap->flag & GCTL_PARAM_WR))
337 ap->flag |= GCTL_PARAM_CHANGED;
339 bcopy(ptr, ap->kvalue, ap->len);
342 bcopy(ptr, ap->kvalue, len);
349 gctl_set_param_err(struct gctl_req *req, const char *param, void const *ptr,
353 switch (gctl_set_param(req, param, ptr, len)) {
355 gctl_error(req, "No write access %s argument", param);
358 gctl_error(req, "Wrong length %s argument", param);
361 gctl_error(req, "Missing %s argument", param);
367 gctl_get_param_flags(struct gctl_req *req, const char *param, int flags, int *len)
371 struct gctl_req_arg *ap;
373 for (i = 0; i < req->narg; i++) {
375 if (strcmp(param, ap->name))
377 if ((ap->flag & flags) != flags)
388 gctl_get_param(struct gctl_req *req, const char *param, int *len)
391 return (gctl_get_param_flags(req, param, GCTL_PARAM_RD, len));
395 gctl_get_asciiparam(struct gctl_req *req, const char *param)
400 p = gctl_get_param_flags(req, param, GCTL_PARAM_RD, &len);
404 gctl_error(req, "Argument without length (%s)", param);
407 if (p[len - 1] != '\0') {
408 gctl_error(req, "Unterminated argument (%s)", param);
415 gctl_get_paraml_opt(struct gctl_req *req, const char *param, int len)
420 p = gctl_get_param(req, param, &i);
423 gctl_error(req, "Wrong length %s argument", param);
429 gctl_get_paraml(struct gctl_req *req, const char *param, int len)
433 p = gctl_get_paraml_opt(req, param, len);
435 gctl_error(req, "Missing %s argument", param);
440 gctl_get_class(struct gctl_req *req, char const *arg)
445 p = gctl_get_asciiparam(req, arg);
447 gctl_error(req, "Missing %s argument", arg);
450 LIST_FOREACH(cp, &g_classes, class) {
451 if (!strcmp(p, cp->name))
454 gctl_error(req, "Class not found: \"%s\"", p);
459 gctl_get_geom(struct gctl_req *req, struct g_class *mp, char const *arg)
465 p = gctl_get_asciiparam(req, arg);
467 gctl_error(req, "Missing %s argument", arg);
470 LIST_FOREACH(gp, &mp->geom, geom)
471 if (!strcmp(p, gp->name))
473 gctl_error(req, "Geom not found: \"%s\"", p);
478 gctl_get_provider(struct gctl_req *req, char const *arg)
481 struct g_provider *pp;
483 p = gctl_get_asciiparam(req, arg);
485 gctl_error(req, "Missing '%s' argument", arg);
488 pp = g_provider_by_name(p);
491 gctl_error(req, "Provider not found: \"%s\"", p);
496 g_ctl_getxml(struct gctl_req *req, struct g_class *mp)
501 int len, i = 0, n = 0, *parents;
502 struct g_geom *gp, **gps;
503 struct g_consumer *cp;
505 parents = gctl_get_paraml(req, "parents", sizeof(*parents));
508 name = gctl_get_asciiparam(req, "arg0");
510 LIST_FOREACH(gp, &mp->geom, geom) {
511 if (name && strcmp(gp->name, name) != 0)
515 LIST_FOREACH(cp, &gp->consumer, consumer)
519 gps = g_malloc((n + 1) * sizeof(*gps), M_WAITOK);
521 LIST_FOREACH(gp, &mp->geom, geom) {
522 if (name && strcmp(gp->name, name) != 0)
526 LIST_FOREACH(cp, &gp->consumer, consumer) {
527 if (cp->provider != NULL)
528 gps[i++] = cp->provider->geom;
532 KASSERT(i == n, ("different number of geoms found (%d != %d)",
536 buf = gctl_get_param_flags(req, "output", GCTL_PARAM_WR, &len);
538 gctl_error(req, "output parameter missing");
542 sb = sbuf_new(NULL, buf, len, SBUF_FIXEDLEN | SBUF_INCLUDENUL);
543 g_conf_specific(sb, gps);
544 gctl_set_param(req, "output", buf, 0);
546 gctl_error(req, "output buffer overflow");
552 g_ctl_req(void *arg, int flag __unused)
555 struct gctl_req *req;
560 mp = gctl_get_class(req, "class");
563 verb = gctl_get_param(req, "verb", NULL);
565 gctl_error(req, "Verb missing");
568 if (strcmp(verb, "getxml") == 0) {
569 g_ctl_getxml(req, mp);
570 } else if (mp->ctlreq == NULL) {
571 gctl_error(req, "Class takes no requests");
573 mp->ctlreq(req, mp, verb);
579 g_ctl_ioctl_ctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag, struct thread *td)
581 struct gctl_req *req;
586 /* It is an error if we cannot return an error text */
589 if (!useracc(req->error, req->lerror, VM_PROT_WRITE))
592 req->serror = sbuf_new_auto();
593 /* Check the version */
594 if (req->version != GCTL_VERSION) {
595 gctl_error(req, "kernel and libgeom version mismatch.");
598 /* Get things on board */
601 if (g_debugflags & G_F_CTLDUMP)
602 gctl_dump(req, "request");
605 g_waitfor_event(g_ctl_req, req, M_WAITOK, NULL);
607 if (g_debugflags & G_F_CTLDUMP)
608 gctl_dump(req, "result");
613 if (sbuf_done(req->serror)) {
614 copyout(sbuf_data(req->serror), req->error,
615 imin(req->lerror, sbuf_len(req->serror) + 1));
618 nerror = req->nerror;
624 g_ctl_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag, struct thread *td)
630 error = g_ctl_ioctl_ctl(dev, cmd, data, fflag, td);