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/*-
* Copyright (c) 2005-2011 Pawel Jakub Dawidek <pawel@dawidek.net>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/geom/eli/g_eli_ctl.c 221630 2011-05-08 09:25:54Z pjd $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/bio.h>
#include <sys/sysctl.h>
#include <sys/malloc.h>
#include <sys/kthread.h>
#include <sys/proc.h>
#include <sys/sched.h>
#include <sys/uio.h>
#include <vm/uma.h>
#include <geom/geom.h>
#include <geom/eli/g_eli.h>
MALLOC_DECLARE(M_ELI);
static void
g_eli_ctl_attach(struct gctl_req *req, struct g_class *mp)
{
struct g_eli_metadata md;
struct g_provider *pp;
const char *name;
u_char *key, mkey[G_ELI_DATAIVKEYLEN];
int *nargs, *detach, *readonly;
int keysize, error;
u_int nkey;
g_topology_assert();
nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
if (nargs == NULL) {
gctl_error(req, "No '%s' argument.", "nargs");
return;
}
if (*nargs != 1) {
gctl_error(req, "Invalid number of arguments.");
return;
}
detach = gctl_get_paraml(req, "detach", sizeof(*detach));
if (detach == NULL) {
gctl_error(req, "No '%s' argument.", "detach");
return;
}
readonly = gctl_get_paraml(req, "readonly", sizeof(*readonly));
if (readonly == NULL) {
gctl_error(req, "No '%s' argument.", "readonly");
return;
}
name = gctl_get_asciiparam(req, "arg0");
if (name == NULL) {
gctl_error(req, "No 'arg%u' argument.", 0);
return;
}
if (strncmp(name, "/dev/", strlen("/dev/")) == 0)
name += strlen("/dev/");
pp = g_provider_by_name(name);
if (pp == NULL) {
gctl_error(req, "Provider %s is invalid.", name);
return;
}
error = g_eli_read_metadata(mp, pp, &md);
if (error != 0) {
gctl_error(req, "Cannot read metadata from %s (error=%d).",
name, error);
return;
}
if (md.md_keys == 0x00) {
bzero(&md, sizeof(md));
gctl_error(req, "No valid keys on %s.", pp->name);
return;
}
key = gctl_get_param(req, "key", &keysize);
if (key == NULL || keysize != G_ELI_USERKEYLEN) {
bzero(&md, sizeof(md));
gctl_error(req, "No '%s' argument.", "key");
return;
}
error = g_eli_mkey_decrypt(&md, key, mkey, &nkey);
bzero(key, keysize);
if (error == -1) {
bzero(&md, sizeof(md));
gctl_error(req, "Wrong key for %s.", pp->name);
return;
} else if (error > 0) {
bzero(&md, sizeof(md));
gctl_error(req, "Cannot decrypt Master Key for %s (error=%d).",
pp->name, error);
return;
}
G_ELI_DEBUG(1, "Using Master Key %u for %s.", nkey, pp->name);
if (*detach && *readonly) {
bzero(&md, sizeof(md));
gctl_error(req, "Options -d and -r are mutually exclusive.");
return;
}
if (*detach)
md.md_flags |= G_ELI_FLAG_WO_DETACH;
if (*readonly)
md.md_flags |= G_ELI_FLAG_RO;
g_eli_create(req, mp, pp, &md, mkey, nkey);
bzero(mkey, sizeof(mkey));
bzero(&md, sizeof(md));
}
static struct g_eli_softc *
g_eli_find_device(struct g_class *mp, const char *prov)
{
struct g_eli_softc *sc;
struct g_geom *gp;
struct g_provider *pp;
struct g_consumer *cp;
if (strncmp(prov, "/dev/", strlen("/dev/")) == 0)
prov += strlen("/dev/");
LIST_FOREACH(gp, &mp->geom, geom) {
sc = gp->softc;
if (sc == NULL)
continue;
pp = LIST_FIRST(&gp->provider);
if (pp != NULL && strcmp(pp->name, prov) == 0)
return (sc);
cp = LIST_FIRST(&gp->consumer);
if (cp != NULL && cp->provider != NULL &&
strcmp(cp->provider->name, prov) == 0) {
return (sc);
}
}
return (NULL);
}
static void
g_eli_ctl_detach(struct gctl_req *req, struct g_class *mp)
{
struct g_eli_softc *sc;
int *force, *last, *nargs, error;
const char *prov;
char param[16];
int i;
g_topology_assert();
nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
if (nargs == NULL) {
gctl_error(req, "No '%s' argument.", "nargs");
return;
}
if (*nargs <= 0) {
gctl_error(req, "Missing device(s).");
return;
}
force = gctl_get_paraml(req, "force", sizeof(*force));
if (force == NULL) {
gctl_error(req, "No '%s' argument.", "force");
return;
}
last = gctl_get_paraml(req, "last", sizeof(*last));
if (last == NULL) {
gctl_error(req, "No '%s' argument.", "last");
return;
}
for (i = 0; i < *nargs; i++) {
snprintf(param, sizeof(param), "arg%d", i);
prov = gctl_get_asciiparam(req, param);
if (prov == NULL) {
gctl_error(req, "No 'arg%d' argument.", i);
return;
}
sc = g_eli_find_device(mp, prov);
if (sc == NULL) {
gctl_error(req, "No such device: %s.", prov);
return;
}
if (*last) {
sc->sc_flags |= G_ELI_FLAG_RW_DETACH;
sc->sc_geom->access = g_eli_access;
} else {
error = g_eli_destroy(sc, *force ? TRUE : FALSE);
if (error != 0) {
gctl_error(req,
"Cannot destroy device %s (error=%d).",
sc->sc_name, error);
return;
}
}
}
}
static void
g_eli_ctl_onetime(struct gctl_req *req, struct g_class *mp)
{
struct g_eli_metadata md;
struct g_provider *pp;
const char *name;
intmax_t *keylen, *sectorsize;
u_char mkey[G_ELI_DATAIVKEYLEN];
int *nargs, *detach;
g_topology_assert();
bzero(&md, sizeof(md));
nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
if (nargs == NULL) {
gctl_error(req, "No '%s' argument.", "nargs");
return;
}
if (*nargs != 1) {
gctl_error(req, "Invalid number of arguments.");
return;
}
detach = gctl_get_paraml(req, "detach", sizeof(*detach));
if (detach == NULL) {
gctl_error(req, "No '%s' argument.", "detach");
return;
}
strlcpy(md.md_magic, G_ELI_MAGIC, sizeof(md.md_magic));
md.md_version = G_ELI_VERSION;
md.md_flags |= G_ELI_FLAG_ONETIME;
if (*detach)
md.md_flags |= G_ELI_FLAG_WO_DETACH;
md.md_ealgo = CRYPTO_ALGORITHM_MIN - 1;
name = gctl_get_asciiparam(req, "aalgo");
if (name == NULL) {
gctl_error(req, "No '%s' argument.", "aalgo");
return;
}
if (*name != '\0') {
md.md_aalgo = g_eli_str2aalgo(name);
if (md.md_aalgo >= CRYPTO_ALGORITHM_MIN &&
md.md_aalgo <= CRYPTO_ALGORITHM_MAX) {
md.md_flags |= G_ELI_FLAG_AUTH;
} else {
/*
* For backward compatibility, check if the -a option
* was used to provide encryption algorithm.
*/
md.md_ealgo = g_eli_str2ealgo(name);
if (md.md_ealgo < CRYPTO_ALGORITHM_MIN ||
md.md_ealgo > CRYPTO_ALGORITHM_MAX) {
gctl_error(req,
"Invalid authentication algorithm.");
return;
} else {
gctl_error(req, "warning: The -e option, not "
"the -a option is now used to specify "
"encryption algorithm to use.");
}
}
}
if (md.md_ealgo < CRYPTO_ALGORITHM_MIN ||
md.md_ealgo > CRYPTO_ALGORITHM_MAX) {
name = gctl_get_asciiparam(req, "ealgo");
if (name == NULL) {
gctl_error(req, "No '%s' argument.", "ealgo");
return;
}
md.md_ealgo = g_eli_str2ealgo(name);
if (md.md_ealgo < CRYPTO_ALGORITHM_MIN ||
md.md_ealgo > CRYPTO_ALGORITHM_MAX) {
gctl_error(req, "Invalid encryption algorithm.");
return;
}
}
keylen = gctl_get_paraml(req, "keylen", sizeof(*keylen));
if (keylen == NULL) {
gctl_error(req, "No '%s' argument.", "keylen");
return;
}
md.md_keylen = g_eli_keylen(md.md_ealgo, *keylen);
if (md.md_keylen == 0) {
gctl_error(req, "Invalid '%s' argument.", "keylen");
return;
}
/* Not important here. */
md.md_provsize = 0;
/* Not important here. */
bzero(md.md_salt, sizeof(md.md_salt));
md.md_keys = 0x01;
arc4rand(mkey, sizeof(mkey), 0);
/* Not important here. */
bzero(md.md_hash, sizeof(md.md_hash));
name = gctl_get_asciiparam(req, "arg0");
if (name == NULL) {
gctl_error(req, "No 'arg%u' argument.", 0);
return;
}
if (strncmp(name, "/dev/", strlen("/dev/")) == 0)
name += strlen("/dev/");
pp = g_provider_by_name(name);
if (pp == NULL) {
gctl_error(req, "Provider %s is invalid.", name);
return;
}
sectorsize = gctl_get_paraml(req, "sectorsize", sizeof(*sectorsize));
if (sectorsize == NULL) {
gctl_error(req, "No '%s' argument.", "sectorsize");
return;
}
if (*sectorsize == 0)
md.md_sectorsize = pp->sectorsize;
else {
if (*sectorsize < 0 || (*sectorsize % pp->sectorsize) != 0) {
gctl_error(req, "Invalid sector size.");
return;
}
if (*sectorsize > PAGE_SIZE) {
gctl_error(req, "warning: Using sectorsize bigger than "
"the page size!");
}
md.md_sectorsize = *sectorsize;
}
g_eli_create(req, mp, pp, &md, mkey, -1);
bzero(mkey, sizeof(mkey));
bzero(&md, sizeof(md));
}
static void
g_eli_ctl_configure(struct gctl_req *req, struct g_class *mp)
{
struct g_eli_softc *sc;
struct g_eli_metadata md;
struct g_provider *pp;
struct g_consumer *cp;
char param[16];
const char *prov;
u_char *sector;
int *nargs, *boot, *noboot;
int error;
u_int i;
g_topology_assert();
nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
if (nargs == NULL) {
gctl_error(req, "No '%s' argument.", "nargs");
return;
}
if (*nargs <= 0) {
gctl_error(req, "Missing device(s).");
return;
}
boot = gctl_get_paraml(req, "boot", sizeof(*boot));
if (boot == NULL) {
gctl_error(req, "No '%s' argument.", "boot");
return;
}
noboot = gctl_get_paraml(req, "noboot", sizeof(*noboot));
if (noboot == NULL) {
gctl_error(req, "No '%s' argument.", "noboot");
return;
}
if (*boot && *noboot) {
gctl_error(req, "Options -b and -B are mutually exclusive.");
return;
}
if (!*boot && !*noboot) {
gctl_error(req, "No option given.");
return;
}
for (i = 0; i < *nargs; i++) {
snprintf(param, sizeof(param), "arg%d", i);
prov = gctl_get_asciiparam(req, param);
if (prov == NULL) {
gctl_error(req, "No 'arg%d' argument.", i);
return;
}
sc = g_eli_find_device(mp, prov);
if (sc == NULL) {
/*
* We ignore not attached providers, userland part will
* take care of them.
*/
G_ELI_DEBUG(1, "Skipping configuration of not attached "
"provider %s.", prov);
continue;
}
if (*boot && (sc->sc_flags & G_ELI_FLAG_BOOT)) {
G_ELI_DEBUG(1, "BOOT flag already configured for %s.",
prov);
continue;
} else if (!*boot && !(sc->sc_flags & G_ELI_FLAG_BOOT)) {
G_ELI_DEBUG(1, "BOOT flag not configured for %s.",
prov);
continue;
}
if (sc->sc_flags & G_ELI_FLAG_RO) {
gctl_error(req, "Cannot change configuration of "
"read-only provider %s.", prov);
continue;
}
cp = LIST_FIRST(&sc->sc_geom->consumer);
pp = cp->provider;
error = g_eli_read_metadata(mp, pp, &md);
if (error != 0) {
gctl_error(req,
"Cannot read metadata from %s (error=%d).",
prov, error);
continue;
}
if (*boot) {
md.md_flags |= G_ELI_FLAG_BOOT;
sc->sc_flags |= G_ELI_FLAG_BOOT;
} else {
md.md_flags &= ~G_ELI_FLAG_BOOT;
sc->sc_flags &= ~G_ELI_FLAG_BOOT;
}
sector = malloc(pp->sectorsize, M_ELI, M_WAITOK | M_ZERO);
eli_metadata_encode(&md, sector);
error = g_write_data(cp, pp->mediasize - pp->sectorsize, sector,
pp->sectorsize);
if (error != 0) {
gctl_error(req,
"Cannot store metadata on %s (error=%d).",
prov, error);
}
bzero(&md, sizeof(md));
bzero(sector, sizeof(sector));
free(sector, M_ELI);
}
}
static void
g_eli_ctl_setkey(struct gctl_req *req, struct g_class *mp)
{
struct g_eli_softc *sc;
struct g_eli_metadata md;
struct g_provider *pp;
struct g_consumer *cp;
const char *name;
u_char *key, *mkeydst, *sector;
intmax_t *valp;
int keysize, nkey, error;
g_topology_assert();
name = gctl_get_asciiparam(req, "arg0");
if (name == NULL) {
gctl_error(req, "No 'arg%u' argument.", 0);
return;
}
sc = g_eli_find_device(mp, name);
if (sc == NULL) {
gctl_error(req, "Provider %s is invalid.", name);
return;
}
if (sc->sc_flags & G_ELI_FLAG_RO) {
gctl_error(req, "Cannot change keys for read-only provider.");
return;
}
cp = LIST_FIRST(&sc->sc_geom->consumer);
pp = cp->provider;
error = g_eli_read_metadata(mp, pp, &md);
if (error != 0) {
gctl_error(req, "Cannot read metadata from %s (error=%d).",
name, error);
return;
}
valp = gctl_get_paraml(req, "keyno", sizeof(*valp));
if (valp == NULL) {
gctl_error(req, "No '%s' argument.", "keyno");
return;
}
if (*valp != -1)
nkey = *valp;
else
nkey = sc->sc_nkey;
if (nkey < 0 || nkey >= G_ELI_MAXMKEYS) {
gctl_error(req, "Invalid '%s' argument.", "keyno");
return;
}
valp = gctl_get_paraml(req, "iterations", sizeof(*valp));
if (valp == NULL) {
gctl_error(req, "No '%s' argument.", "iterations");
return;
}
/* Check if iterations number should and can be changed. */
if (*valp != -1) {
if (bitcount32(md.md_keys) != 1) {
gctl_error(req, "To be able to use '-i' option, only "
"one key can be defined.");
return;
}
if (md.md_keys != (1 << nkey)) {
gctl_error(req, "Only already defined key can be "
"changed when '-i' option is used.");
return;
}
md.md_iterations = *valp;
}
key = gctl_get_param(req, "key", &keysize);
if (key == NULL || keysize != G_ELI_USERKEYLEN) {
bzero(&md, sizeof(md));
gctl_error(req, "No '%s' argument.", "key");
return;
}
mkeydst = md.md_mkeys + nkey * G_ELI_MKEYLEN;
md.md_keys |= (1 << nkey);
bcopy(sc->sc_mkey, mkeydst, sizeof(sc->sc_mkey));
/* Encrypt Master Key with the new key. */
error = g_eli_mkey_encrypt(md.md_ealgo, key, md.md_keylen, mkeydst);
bzero(key, sizeof(key));
if (error != 0) {
bzero(&md, sizeof(md));
gctl_error(req, "Cannot encrypt Master Key (error=%d).", error);
return;
}
sector = malloc(pp->sectorsize, M_ELI, M_WAITOK | M_ZERO);
/* Store metadata with fresh key. */
eli_metadata_encode(&md, sector);
bzero(&md, sizeof(md));
error = g_write_data(cp, pp->mediasize - pp->sectorsize, sector,
pp->sectorsize);
bzero(sector, sizeof(sector));
free(sector, M_ELI);
if (error != 0) {
gctl_error(req, "Cannot store metadata on %s (error=%d).",
pp->name, error);
return;
}
G_ELI_DEBUG(1, "Key %u changed on %s.", nkey, pp->name);
}
static void
g_eli_ctl_delkey(struct gctl_req *req, struct g_class *mp)
{
struct g_eli_softc *sc;
struct g_eli_metadata md;
struct g_provider *pp;
struct g_consumer *cp;
const char *name;
u_char *mkeydst, *sector;
intmax_t *valp;
size_t keysize;
int error, nkey, *all, *force;
u_int i;
g_topology_assert();
nkey = 0; /* fixes causeless gcc warning */
name = gctl_get_asciiparam(req, "arg0");
if (name == NULL) {
gctl_error(req, "No 'arg%u' argument.", 0);
return;
}
sc = g_eli_find_device(mp, name);
if (sc == NULL) {
gctl_error(req, "Provider %s is invalid.", name);
return;
}
if (sc->sc_flags & G_ELI_FLAG_RO) {
gctl_error(req, "Cannot delete keys for read-only provider.");
return;
}
cp = LIST_FIRST(&sc->sc_geom->consumer);
pp = cp->provider;
error = g_eli_read_metadata(mp, pp, &md);
if (error != 0) {
gctl_error(req, "Cannot read metadata from %s (error=%d).",
name, error);
return;
}
all = gctl_get_paraml(req, "all", sizeof(*all));
if (all == NULL) {
gctl_error(req, "No '%s' argument.", "all");
return;
}
if (*all) {
mkeydst = md.md_mkeys;
keysize = sizeof(md.md_mkeys);
} else {
force = gctl_get_paraml(req, "force", sizeof(*force));
if (force == NULL) {
gctl_error(req, "No '%s' argument.", "force");
return;
}
valp = gctl_get_paraml(req, "keyno", sizeof(*valp));
if (valp == NULL) {
gctl_error(req, "No '%s' argument.", "keyno");
return;
}
if (*valp != -1)
nkey = *valp;
else
nkey = sc->sc_nkey;
if (nkey < 0 || nkey >= G_ELI_MAXMKEYS) {
gctl_error(req, "Invalid '%s' argument.", "keyno");
return;
}
if (!(md.md_keys & (1 << nkey)) && !*force) {
gctl_error(req, "Master Key %u is not set.", nkey);
return;
}
md.md_keys &= ~(1 << nkey);
if (md.md_keys == 0 && !*force) {
gctl_error(req, "This is the last Master Key. Use '-f' "
"flag if you really want to remove it.");
return;
}
mkeydst = md.md_mkeys + nkey * G_ELI_MKEYLEN;
keysize = G_ELI_MKEYLEN;
}
sector = malloc(pp->sectorsize, M_ELI, M_WAITOK | M_ZERO);
for (i = 0; i <= g_eli_overwrites; i++) {
if (i == g_eli_overwrites)
bzero(mkeydst, keysize);
else
arc4rand(mkeydst, keysize, 0);
/* Store metadata with destroyed key. */
eli_metadata_encode(&md, sector);
error = g_write_data(cp, pp->mediasize - pp->sectorsize, sector,
pp->sectorsize);
if (error != 0) {
G_ELI_DEBUG(0, "Cannot store metadata on %s "
"(error=%d).", pp->name, error);
}
/*
* Flush write cache so we don't overwrite data N times in cache
* and only once on disk.
*/
(void)g_io_flush(cp);
}
bzero(&md, sizeof(md));
bzero(sector, sizeof(sector));
free(sector, M_ELI);
if (*all)
G_ELI_DEBUG(1, "All keys removed from %s.", pp->name);
else
G_ELI_DEBUG(1, "Key %d removed from %s.", nkey, pp->name);
}
static void
g_eli_suspend_one(struct g_eli_softc *sc, struct gctl_req *req)
{
struct g_eli_worker *wr;
g_topology_assert();
KASSERT(sc != NULL, ("NULL sc"));
if (sc->sc_flags & G_ELI_FLAG_ONETIME) {
gctl_error(req,
"Device %s is using one-time key, suspend not supported.",
sc->sc_name);
return;
}
mtx_lock(&sc->sc_queue_mtx);
if (sc->sc_flags & G_ELI_FLAG_SUSPEND) {
mtx_unlock(&sc->sc_queue_mtx);
gctl_error(req, "Device %s already suspended.",
sc->sc_name);
return;
}
sc->sc_flags |= G_ELI_FLAG_SUSPEND;
wakeup(sc);
for (;;) {
LIST_FOREACH(wr, &sc->sc_workers, w_next) {
if (wr->w_active)
break;
}
if (wr == NULL)
break;
/* Not all threads suspended. */
msleep(&sc->sc_workers, &sc->sc_queue_mtx, PRIBIO,
"geli:suspend", 0);
}
/*
* Clear sensitive data on suspend, they will be recovered on resume.
*/
bzero(sc->sc_mkey, sizeof(sc->sc_mkey));
g_eli_key_destroy(sc);
bzero(sc->sc_akey, sizeof(sc->sc_akey));
bzero(&sc->sc_akeyctx, sizeof(sc->sc_akeyctx));
bzero(sc->sc_ivkey, sizeof(sc->sc_ivkey));
bzero(&sc->sc_ivctx, sizeof(sc->sc_ivctx));
mtx_unlock(&sc->sc_queue_mtx);
G_ELI_DEBUG(0, "Device %s has been suspended.", sc->sc_name);
}
static void
g_eli_ctl_suspend(struct gctl_req *req, struct g_class *mp)
{
struct g_eli_softc *sc;
int *all, *nargs;
g_topology_assert();
nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
if (nargs == NULL) {
gctl_error(req, "No '%s' argument.", "nargs");
return;
}
all = gctl_get_paraml(req, "all", sizeof(*all));
if (all == NULL) {
gctl_error(req, "No '%s' argument.", "all");
return;
}
if (!*all && *nargs == 0) {
gctl_error(req, "Too few arguments.");
return;
}
if (*all) {
struct g_geom *gp, *gp2;
LIST_FOREACH_SAFE(gp, &mp->geom, geom, gp2) {
sc = gp->softc;
if (sc->sc_flags & G_ELI_FLAG_ONETIME) {
G_ELI_DEBUG(0,
"Device %s is using one-time key, suspend not supported, skipping.",
sc->sc_name);
continue;
}
g_eli_suspend_one(sc, req);
}
} else {
const char *prov;
char param[16];
int i;
for (i = 0; i < *nargs; i++) {
snprintf(param, sizeof(param), "arg%d", i);
prov = gctl_get_asciiparam(req, param);
if (prov == NULL) {
G_ELI_DEBUG(0, "No 'arg%d' argument.", i);
continue;
}
sc = g_eli_find_device(mp, prov);
if (sc == NULL) {
G_ELI_DEBUG(0, "No such provider: %s.", prov);
continue;
}
g_eli_suspend_one(sc, req);
}
}
}
static void
g_eli_ctl_resume(struct gctl_req *req, struct g_class *mp)
{
struct g_eli_metadata md;
struct g_eli_softc *sc;
struct g_provider *pp;
struct g_consumer *cp;
const char *name;
u_char *key, mkey[G_ELI_DATAIVKEYLEN];
int *nargs, keysize, error;
u_int nkey;
g_topology_assert();
nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
if (nargs == NULL) {
gctl_error(req, "No '%s' argument.", "nargs");
return;
}
if (*nargs != 1) {
gctl_error(req, "Invalid number of arguments.");
return;
}
name = gctl_get_asciiparam(req, "arg0");
if (name == NULL) {
gctl_error(req, "No 'arg%u' argument.", 0);
return;
}
sc = g_eli_find_device(mp, name);
if (sc == NULL) {
gctl_error(req, "Provider %s is invalid.", name);
return;
}
cp = LIST_FIRST(&sc->sc_geom->consumer);
pp = cp->provider;
error = g_eli_read_metadata(mp, pp, &md);
if (error != 0) {
gctl_error(req, "Cannot read metadata from %s (error=%d).",
name, error);
return;
}
if (md.md_keys == 0x00) {
bzero(&md, sizeof(md));
gctl_error(req, "No valid keys on %s.", pp->name);
return;
}
key = gctl_get_param(req, "key", &keysize);
if (key == NULL || keysize != G_ELI_USERKEYLEN) {
bzero(&md, sizeof(md));
gctl_error(req, "No '%s' argument.", "key");
return;
}
error = g_eli_mkey_decrypt(&md, key, mkey, &nkey);
bzero(key, keysize);
if (error == -1) {
bzero(&md, sizeof(md));
gctl_error(req, "Wrong key for %s.", pp->name);
return;
} else if (error > 0) {
bzero(&md, sizeof(md));
gctl_error(req, "Cannot decrypt Master Key for %s (error=%d).",
pp->name, error);
return;
}
G_ELI_DEBUG(1, "Using Master Key %u for %s.", nkey, pp->name);
mtx_lock(&sc->sc_queue_mtx);
if (!(sc->sc_flags & G_ELI_FLAG_SUSPEND))
gctl_error(req, "Device %s is not suspended.", name);
else {
/* Restore sc_mkey, sc_ekeys, sc_akey and sc_ivkey. */
g_eli_mkey_propagate(sc, mkey);
sc->sc_flags &= ~G_ELI_FLAG_SUSPEND;
G_ELI_DEBUG(1, "Resumed %s.", pp->name);
wakeup(sc);
}
mtx_unlock(&sc->sc_queue_mtx);
bzero(mkey, sizeof(mkey));
bzero(&md, sizeof(md));
}
static int
g_eli_kill_one(struct g_eli_softc *sc)
{
struct g_provider *pp;
struct g_consumer *cp;
int error = 0;
g_topology_assert();
if (sc == NULL)
return (ENOENT);
pp = LIST_FIRST(&sc->sc_geom->provider);
g_error_provider(pp, ENXIO);
cp = LIST_FIRST(&sc->sc_geom->consumer);
pp = cp->provider;
if (sc->sc_flags & G_ELI_FLAG_RO) {
G_ELI_DEBUG(0, "WARNING: Metadata won't be erased on read-only "
"provider: %s.", pp->name);
} else {
u_char *sector;
u_int i;
int err;
sector = malloc(pp->sectorsize, M_ELI, M_WAITOK);
for (i = 0; i <= g_eli_overwrites; i++) {
if (i == g_eli_overwrites)
bzero(sector, pp->sectorsize);
else
arc4rand(sector, pp->sectorsize, 0);
err = g_write_data(cp, pp->mediasize - pp->sectorsize,
sector, pp->sectorsize);
if (err != 0) {
G_ELI_DEBUG(0, "Cannot erase metadata on %s "
"(error=%d).", pp->name, err);
if (error == 0)
error = err;
}
/*
* Flush write cache so we don't overwrite data N times
* in cache and only once on disk.
*/
(void)g_io_flush(cp);
}
free(sector, M_ELI);
}
if (error == 0)
G_ELI_DEBUG(0, "%s has been killed.", pp->name);
g_eli_destroy(sc, TRUE);
return (error);
}
static void
g_eli_ctl_kill(struct gctl_req *req, struct g_class *mp)
{
int *all, *nargs;
int error;
g_topology_assert();
nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
if (nargs == NULL) {
gctl_error(req, "No '%s' argument.", "nargs");
return;
}
all = gctl_get_paraml(req, "all", sizeof(*all));
if (all == NULL) {
gctl_error(req, "No '%s' argument.", "all");
return;
}
if (!*all && *nargs == 0) {
gctl_error(req, "Too few arguments.");
return;
}
if (*all) {
struct g_geom *gp, *gp2;
LIST_FOREACH_SAFE(gp, &mp->geom, geom, gp2) {
error = g_eli_kill_one(gp->softc);
if (error != 0)
gctl_error(req, "Not fully done.");
}
} else {
struct g_eli_softc *sc;
const char *prov;
char param[16];
int i;
for (i = 0; i < *nargs; i++) {
snprintf(param, sizeof(param), "arg%d", i);
prov = gctl_get_asciiparam(req, param);
if (prov == NULL) {
G_ELI_DEBUG(0, "No 'arg%d' argument.", i);
continue;
}
sc = g_eli_find_device(mp, prov);
if (sc == NULL) {
G_ELI_DEBUG(0, "No such provider: %s.", prov);
continue;
}
error = g_eli_kill_one(sc);
if (error != 0)
gctl_error(req, "Not fully done.");
}
}
}
void
g_eli_config(struct gctl_req *req, struct g_class *mp, const char *verb)
{
uint32_t *version;
g_topology_assert();
version = gctl_get_paraml(req, "version", sizeof(*version));
if (version == NULL) {
gctl_error(req, "No '%s' argument.", "version");
return;
}
while (*version != G_ELI_VERSION) {
if (G_ELI_VERSION == G_ELI_VERSION_06 &&
*version == G_ELI_VERSION_05) {
/* Compatible. */
break;
}
gctl_error(req, "Userland and kernel parts are out of sync.");
return;
}
if (strcmp(verb, "attach") == 0)
g_eli_ctl_attach(req, mp);
else if (strcmp(verb, "detach") == 0 || strcmp(verb, "stop") == 0)
g_eli_ctl_detach(req, mp);
else if (strcmp(verb, "onetime") == 0)
g_eli_ctl_onetime(req, mp);
else if (strcmp(verb, "configure") == 0)
g_eli_ctl_configure(req, mp);
else if (strcmp(verb, "setkey") == 0)
g_eli_ctl_setkey(req, mp);
else if (strcmp(verb, "delkey") == 0)
g_eli_ctl_delkey(req, mp);
else if (strcmp(verb, "suspend") == 0)
g_eli_ctl_suspend(req, mp);
else if (strcmp(verb, "resume") == 0)
g_eli_ctl_resume(req, mp);
else if (strcmp(verb, "kill") == 0)
g_eli_ctl_kill(req, mp);
else
gctl_error(req, "Unknown verb.");
}