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GEOM: Skip copyin() for GCTL_PARAM_WR parameters.

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Kernel does not read those parameters, so copyin is pointless.

While there, replace some KASSERT()s with CTASSERT()s.

MFC after:	1 month
This commit is contained in:
Alexander Motin 2022-03-07 10:57:56 -05:00
parent 080b4e8a0c
commit 01b9c48b5d
1 changed files with 15 additions and 12 deletions
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27
sys/geom/geom_ctl.c
View file

@ -63,16 +63,15 @@ static struct cdevsw g_ctl_cdevsw = {
.d_name = "g_ctl",
};
CTASSERT(GCTL_PARAM_RD == VM_PROT_READ);
CTASSERT(GCTL_PARAM_WR == VM_PROT_WRITE);
void
g_ctl_init(void)
{
make_dev_credf(MAKEDEV_ETERNAL, &g_ctl_cdevsw, 0, NULL,
UID_ROOT, GID_OPERATOR, 0640, PATH_GEOM_CTL);
KASSERT(GCTL_PARAM_RD == VM_PROT_READ,
("GCTL_PARAM_RD != VM_PROT_READ"));
KASSERT(GCTL_PARAM_WR == VM_PROT_WRITE,
("GCTL_PARAM_WR != VM_PROT_WRITE"));
}
/*
@ -222,14 +221,18 @@ gctl_copyin(struct gctl_req *req)
gctl_error(req, "negative param length");
break;
}
p = geom_alloc_copyin(req, ap[i].value, ap[i].len);
if (p == NULL)
break;
if ((ap[i].flag & GCTL_PARAM_ASCII) &&
p[ap[i].len - 1] != '\0') {
gctl_error(req, "unterminated param value");
g_free(p);
break;
if (ap[i].flag & GCTL_PARAM_RD) {
p = geom_alloc_copyin(req, ap[i].value, ap[i].len);
if (p == NULL)
break;
if ((ap[i].flag & GCTL_PARAM_ASCII) &&
p[ap[i].len - 1] != '\0') {
gctl_error(req, "unterminated param value");
g_free(p);
break;
}
} else {
p = g_malloc(ap[i].len, M_WAITOK | M_ZERO);
}
ap[i].kvalue = p;
ap[i].flag |= GCTL_PARAM_VALUEKERNEL;