/*
* NB! curthread is user process which GCTL'ed.
*/
static void
g_bsd_config(struct gctl_req *req, struct g_class *mp, char const *verb)
{
u_char *label;
int error;
struct h0h0 h0h0;
struct g_geom *gp;
struct g_slicer *gsp;
struct g_consumer *cp;
struct g_bsd_softc *ms;
g_topology_assert();
gp = gctl_get_geom(req, mp, "geom");
if (gp == NULL)
return;
cp = LIST_FIRST(&gp->consumer);
gsp = gp->softc;
ms = gsp->softc;
if (!strcmp(verb, "read mbroffset")) {
gctl_set_param_err(req, "mbroffset", &ms->mbroffset,
sizeof(ms->mbroffset));
return;
} else if (!strcmp(verb, "write label")) {
label = gctl_get_paraml(req, "label", LABELSIZE);
if (label == NULL)
return;
h0h0.gp = gp;
h0h0.ms = gsp->softc;
h0h0.label = label;
h0h0.error = -1;
/* XXX: Does this reference register with our selfdestruct code ? */
error = g_access(cp, 1, 1, 1);
if (error) {
gctl_error(req, "could not access consumer");
return;
}
g_bsd_callconfig(&h0h0, 0);
error = h0h0.error;
g_access(cp, -1, -1, -1);
} else if (!strcmp(verb, "write bootcode")) {
label = gctl_get_paraml(req, "bootcode", BBSIZE);
if (label == NULL)
return;
/* XXX: Does this reference register with our selfdestruct code ? */
error = g_access(cp, 1, 1, 1);
if (error) {
gctl_error(req, "could not access consumer");
return;
}
error = g_bsd_writelabel(gp, label);
g_access(cp, -1, -1, -1);
} else {
gctl_error(req, "Unknown verb parameter");
}
return;
}
static void
g_bsd_callconfig(void *arg, int flag)
{
struct h0h0 *hp;
hp = arg;
hp->error = g_bsd_modify(hp->gp, hp->label);
if (!hp->error)
hp->error = g_bsd_writelabel(hp->gp, NULL);
}
/*-
* This start routine is only called for non-trivial requests, all the
* trivial ones are handled autonomously by the slice code.
* For requests we handle here, we must call the g_io_deliver() on the
* bio, and return non-zero to indicate to the slice code that we did so.
* This code executes in the "DOWN" I/O path, this means:
* * No sleeping.
* * Don't grab the topology lock.
* * Don't call biowait, g_getattr(), g_setattr() or g_read_data()
*/
static int
g_bsd_ioctl(struct g_provider *pp, u_long cmd, void *data, int fflag, struct thread *td)
{
struct g_geom *gp;
struct g_bsd_softc *ms;
struct g_slicer *gsp;
u_char *label;
int error;
gp = pp->geom;
gsp = gp->softc;
ms = gsp->softc;
switch(cmd) {
case DIOCGDINFO:
/* Return a copy of the disklabel to userland. */
bsd_disklabel_le_dec(ms->label, data, MAXPARTITIONS);
return(0);
case DIOCBSDBB: {
struct g_consumer *cp;
u_char *buf;
void *p;
int error, i;
uint64_t sum;
if (!(fflag & FWRITE))
return (EPERM);
/* The disklabel to set is the ioctl argument. */
buf = g_malloc(BBSIZE, M_WAITOK);
p = *(void **)data;
error = copyin(p, buf, BBSIZE);
if (!error) {
/* XXX: Rude, but supposedly safe */
DROP_GIANT();
g_topology_lock();
/* Validate and modify our slice instance to match. */
error = g_bsd_modify(gp, buf + ms->labeloffset);
if (!error) {
cp = LIST_FIRST(&gp->consumer);
if (ms->labeloffset == ALPHA_LABEL_OFFSET) {
sum = 0;
for (i = 0; i < 63; i++)
sum += le64dec(buf + i * 8);
le64enc(buf + 504, sum);
}
error = g_write_data(cp, 0, buf, BBSIZE);
}
g_topology_unlock();
PICKUP_GIANT();
}
g_free(buf);
return (error);
}
case DIOCSDINFO:
case DIOCWDINFO: {
if (!(fflag & FWRITE))
return (EPERM);
label = g_malloc(LABELSIZE, M_WAITOK);
/* The disklabel to set is the ioctl argument. */
bsd_disklabel_le_enc(label, data);
DROP_GIANT();
g_topology_lock();
/* Validate and modify our slice instance to match. */
error = g_bsd_modify(gp, label);
if (error == 0 && cmd == DIOCWDINFO)
error = g_bsd_writelabel(gp, NULL);
g_topology_unlock();
PICKUP_GIANT();
g_free(label);
return(error);
}
default:
return (ENOIOCTL);
}
}
