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)) {
100 sbuf_vprintf(req->serror, fmt, ap);
102 sbuf_finish(req->serror);
103 if (g_debugflags & G_F_CTLDUMP)
104 printf("gctl %p error \"%s\"\n", req, sbuf_data(req->serror));
105 return (req->nerror);
109 * Allocate space and copyin() something.
110 * XXX: this should really be a standard function in the kernel.
113 geom_alloc_copyin(struct gctl_req *req, void *uaddr, size_t len)
117 ptr = g_malloc(len, M_WAITOK);
118 req->nerror = copyin(uaddr, ptr, len);
126 gctl_copyin(struct gctl_req *req)
128 struct gctl_req_arg *ap;
132 if (req->narg > GEOM_CTL_ARG_MAX) {
133 gctl_error(req, "too many arguments");
138 ap = geom_alloc_copyin(req, req->arg, req->narg * sizeof(*ap));
140 gctl_error(req, "bad control request");
145 /* Nothing have been copyin()'ed yet */
146 for (i = 0; i < req->narg; i++) {
147 ap[i].flag &= ~(GCTL_PARAM_NAMEKERNEL|GCTL_PARAM_VALUEKERNEL);
148 ap[i].flag &= ~GCTL_PARAM_CHANGED;
152 for (i = 0; i < req->narg; i++) {
153 if (ap[i].nlen < 1 || ap[i].nlen > SPECNAMELEN) {
155 "wrong param name length %d: %d", i, ap[i].nlen);
158 p = geom_alloc_copyin(req, ap[i].name, ap[i].nlen);
161 if (p[ap[i].nlen - 1] != '\0') {
162 gctl_error(req, "unterminated param name");
167 ap[i].flag |= GCTL_PARAM_NAMEKERNEL;
168 if (ap[i].len <= 0) {
169 gctl_error(req, "negative param length");
172 if (ap[i].flag & GCTL_PARAM_RD) {
173 p = geom_alloc_copyin(req, ap[i].value, ap[i].len);
176 if ((ap[i].flag & GCTL_PARAM_ASCII) &&
177 p[ap[i].len - 1] != '\0') {
178 gctl_error(req, "unterminated param value");
183 p = g_malloc(ap[i].len, M_WAITOK | M_ZERO);
186 ap[i].flag |= GCTL_PARAM_VALUEKERNEL;
193 gctl_copyout(struct gctl_req *req)
196 struct gctl_req_arg *ap;
202 for (i = 0; i < req->narg; i++, ap++) {
203 if (!(ap->flag & GCTL_PARAM_CHANGED))
205 error = copyout(ap->kvalue, ap->value, ap->len);
215 gctl_free(struct gctl_req *req)
219 sbuf_delete(req->serror);
220 if (req->arg == NULL)
222 for (i = 0; i < req->narg; i++) {
223 if (req->arg[i].flag & GCTL_PARAM_NAMEKERNEL)
224 g_free(req->arg[i].name);
225 if ((req->arg[i].flag & GCTL_PARAM_VALUEKERNEL) &&
227 g_free(req->arg[i].kvalue);
233 gctl_dump(struct gctl_req *req, const char *what)
235 struct gctl_req_arg *ap;
239 printf("Dump of gctl %s at %p:\n", what, req);
240 if (req->nerror > 0) {
241 printf(" nerror:\t%d\n", req->nerror);
242 if (sbuf_len(req->serror) > 0)
243 printf(" error:\t\"%s\"\n", sbuf_data(req->serror));
245 if (req->arg == NULL)
247 for (i = 0; i < req->narg; i++) {
249 if (!(ap->flag & GCTL_PARAM_NAMEKERNEL))
250 printf(" param:\t%d@%p", ap->nlen, ap->name);
252 printf(" param:\t\"%s\"", ap->name);
253 printf(" [%s%s%d] = ",
254 ap->flag & GCTL_PARAM_RD ? "R" : "",
255 ap->flag & GCTL_PARAM_WR ? "W" : "",
257 if (!(ap->flag & GCTL_PARAM_VALUEKERNEL)) {
258 printf(" =@ %p", ap->value);
259 } else if (ap->flag & GCTL_PARAM_ASCII) {
260 printf("\"%s\"", (char *)ap->kvalue);
261 } else if (ap->len > 0) {
262 for (j = 0; j < ap->len && j < 512; j++)
263 printf(" %02x", ((u_char *)ap->kvalue)[j]);
265 printf(" = %p", ap->kvalue);
272 gctl_set_param(struct gctl_req *req, const char *param, void const *ptr,
276 struct gctl_req_arg *ap;
278 for (i = 0; i < req->narg; i++) {
280 if (strcmp(param, ap->name))
282 if (!(ap->flag & GCTL_PARAM_WR))
284 ap->flag |= GCTL_PARAM_CHANGED;
286 bcopy(ptr, ap->kvalue, ap->len);
289 bcopy(ptr, ap->kvalue, len);
296 gctl_set_param_err(struct gctl_req *req, const char *param, void const *ptr,
300 switch (gctl_set_param(req, param, ptr, len)) {
302 gctl_error(req, "No write access %s argument", param);
305 gctl_error(req, "Wrong length %s argument", param);
308 gctl_error(req, "Missing %s argument", param);
314 gctl_get_param_flags(struct gctl_req *req, const char *param, int flags, int *len)
318 struct gctl_req_arg *ap;
320 for (i = 0; i < req->narg; i++) {
322 if (strcmp(param, ap->name))
324 if ((ap->flag & flags) != flags)
335 gctl_get_param(struct gctl_req *req, const char *param, int *len)
338 return (gctl_get_param_flags(req, param, GCTL_PARAM_RD, len));
342 gctl_get_asciiparam(struct gctl_req *req, const char *param)
347 p = gctl_get_param_flags(req, param, GCTL_PARAM_RD, &len);
351 gctl_error(req, "Argument without length (%s)", param);
354 if (p[len - 1] != '\0') {
355 gctl_error(req, "Unterminated argument (%s)", param);
362 gctl_get_paraml_opt(struct gctl_req *req, const char *param, int len)
367 p = gctl_get_param(req, param, &i);
370 gctl_error(req, "Wrong length %s argument", param);
376 gctl_get_paraml(struct gctl_req *req, const char *param, int len)
380 p = gctl_get_paraml_opt(req, param, len);
382 gctl_error(req, "Missing %s argument", param);
387 gctl_get_class(struct gctl_req *req, char const *arg)
392 p = gctl_get_asciiparam(req, arg);
394 gctl_error(req, "Missing %s argument", arg);
397 LIST_FOREACH(cp, &g_classes, class) {
398 if (!strcmp(p, cp->name))
401 gctl_error(req, "Class not found: \"%s\"", p);
406 gctl_get_geom(struct gctl_req *req, struct g_class *mp, char const *arg)
412 p = gctl_get_asciiparam(req, arg);
414 gctl_error(req, "Missing %s argument", arg);
417 LIST_FOREACH(gp, &mp->geom, geom)
418 if (!strcmp(p, gp->name))
420 gctl_error(req, "Geom not found: \"%s\"", p);
425 gctl_get_provider(struct gctl_req *req, char const *arg)
428 struct g_provider *pp;
430 p = gctl_get_asciiparam(req, arg);
432 gctl_error(req, "Missing '%s' argument", arg);
435 pp = g_provider_by_name(p);
438 gctl_error(req, "Provider not found: \"%s\"", p);
443 g_ctl_getxml(struct gctl_req *req, struct g_class *mp)
448 int len, i = 0, n = 0, *parents;
449 struct g_geom *gp, **gps;
450 struct g_consumer *cp;
452 parents = gctl_get_paraml(req, "parents", sizeof(*parents));
455 name = gctl_get_asciiparam(req, "arg0");
457 LIST_FOREACH(gp, &mp->geom, geom) {
458 if (name && strcmp(gp->name, name) != 0)
462 LIST_FOREACH(cp, &gp->consumer, consumer)
466 gps = g_malloc((n + 1) * sizeof(*gps), M_WAITOK);
468 LIST_FOREACH(gp, &mp->geom, geom) {
469 if (name && strcmp(gp->name, name) != 0)
473 LIST_FOREACH(cp, &gp->consumer, consumer) {
474 if (cp->provider != NULL)
475 gps[i++] = cp->provider->geom;
479 KASSERT(i == n, ("different number of geoms found (%d != %d)",
483 buf = gctl_get_param_flags(req, "output", GCTL_PARAM_WR, &len);
485 gctl_error(req, "output parameter missing");
489 sb = sbuf_new(NULL, buf, len, SBUF_FIXEDLEN | SBUF_INCLUDENUL);
490 g_conf_specific(sb, gps);
491 gctl_set_param(req, "output", buf, 0);
493 gctl_error(req, "output buffer overflow");
499 g_ctl_req(void *arg, int flag __unused)
502 struct gctl_req *req;
507 mp = gctl_get_class(req, "class");
510 verb = gctl_get_param(req, "verb", NULL);
512 gctl_error(req, "Verb missing");
515 if (strcmp(verb, "getxml") == 0) {
516 g_ctl_getxml(req, mp);
517 } else if (mp->ctlreq == NULL) {
518 gctl_error(req, "Class takes no requests");
520 mp->ctlreq(req, mp, verb);
526 g_ctl_ioctl_ctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag, struct thread *td)
528 struct gctl_req *req;
533 /* It is an error if we cannot return an error text */
536 if (!useracc(req->error, req->lerror, VM_PROT_WRITE))
539 req->serror = sbuf_new_auto();
540 /* Check the version */
541 if (req->version != GCTL_VERSION) {
542 gctl_error(req, "kernel and libgeom version mismatch.");
545 /* Get things on board */
548 if (g_debugflags & G_F_CTLDUMP)
549 gctl_dump(req, "request");
552 g_waitfor_event(g_ctl_req, req, M_WAITOK, NULL);
554 if (g_debugflags & G_F_CTLDUMP)
555 gctl_dump(req, "result");
560 if (sbuf_done(req->serror)) {
561 copyout(sbuf_data(req->serror), req->error,
562 imin(req->lerror, sbuf_len(req->serror) + 1));
565 nerror = req->nerror;
571 g_ctl_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag, struct thread *td)
577 error = g_ctl_ioctl_ctl(dev, cmd, data, fflag, td);