static void
vmmemctl_deinit_sysctl(void)
{
if (oid) {
sysctl_remove_oid(oid,1,0);
}
}
/*
* The following function will do nothing if the structure pointed to
* by "ssc" and "sc" is zero or has already been detached.
*/
void
ucom_detach(struct ucom_super_softc *ssc, struct ucom_softc *sc)
{
int subunit;
if (!(ssc->sc_flag & UCOM_FLAG_ATTACHED))
return; /* not initialized */
if (ssc->sc_sysctl_ttyname != NULL) {
sysctl_remove_oid(ssc->sc_sysctl_ttyname, 1, 0);
ssc->sc_sysctl_ttyname = NULL;
}
if (ssc->sc_sysctl_ttyports != NULL) {
sysctl_remove_oid(ssc->sc_sysctl_ttyports, 1, 0);
ssc->sc_sysctl_ttyports = NULL;
}
usb_proc_drain(&ssc->sc_tq);
for (subunit = 0; subunit < ssc->sc_subunits; subunit++) {
if (sc[subunit].sc_flag & UCOM_FLAG_ATTACHED) {
ucom_detach_tty(ssc, &sc[subunit]);
/* avoid duplicate detach */
sc[subunit].sc_flag &= ~UCOM_FLAG_ATTACHED;
}
}
usb_proc_free(&ssc->sc_tq);
ucom_unref(ssc);
if (ssc->sc_flag & UCOM_FLAG_WAIT_REFS)
ucom_drain(ssc);
/* make sure we don't detach twice */
ssc->sc_flag &= ~UCOM_FLAG_ATTACHED;
}
/*
* The function called at load/unload.
*/
static int
load(module_t mod, int cmd, void *arg)
{
int error;
error = 0;
switch (cmd) {
case MOD_LOAD:
/* Initialize the contexts */
printf("Initializing contexts and creating subtrees.\n\n");
sysctl_ctx_init(&clist);
sysctl_ctx_init(&clist1);
sysctl_ctx_init(&clist2);
/*
* Create two partially overlapping subtrees, belonging
* to different contexts.
*/
printf("TREE ROOT NAME\n");
a_root = SYSCTL_ADD_NODE(&clist,
SYSCTL_STATIC_CHILDREN(/* top of sysctl tree */),
OID_AUTO, "dyn_sysctl", CTLFLAG_RW, 0,
"dyn_sysctl root node");
a_root = SYSCTL_ADD_NODE(&clist1,
SYSCTL_STATIC_CHILDREN(/* top of sysctl tree */),
OID_AUTO, "dyn_sysctl", CTLFLAG_RW, 0,
"dyn_sysctl root node");
if (a_root == NULL) {
printf("SYSCTL_ADD_NODE failed!\n");
return (EINVAL);
}
SYSCTL_ADD_LONG(&clist, SYSCTL_CHILDREN(a_root),
OID_AUTO, "long_a", CTLFLAG_RW, &a, "just to try");
SYSCTL_ADD_INT(&clist, SYSCTL_CHILDREN(a_root),
OID_AUTO, "int_b", CTLFLAG_RW, &b, 0, "just to try 1");
a_root1 = SYSCTL_ADD_NODE(&clist, SYSCTL_CHILDREN(a_root),
OID_AUTO, "nextlevel", CTLFLAG_RD, 0, "one level down");
SYSCTL_ADD_STRING(&clist, SYSCTL_CHILDREN(a_root1),
OID_AUTO, "string_c", CTLFLAG_RD, c, 0, "just to try 2");
printf("1. (%p) / dyn_sysctl\n", &clist);
/* Add a subtree under already existing category */
a_root1 = SYSCTL_ADD_NODE(&clist, SYSCTL_STATIC_CHILDREN(_kern),
OID_AUTO, "dyn_sysctl", CTLFLAG_RW, 0, "dyn_sysctl root node");
if (a_root1 == NULL) {
printf("SYSCTL_ADD_NODE failed!\n");
return (EINVAL);
}
SYSCTL_ADD_PROC(&clist, SYSCTL_CHILDREN(a_root1),
OID_AUTO, "procedure", CTLTYPE_STRING | CTLFLAG_RD,
NULL, 0, sysctl_dyn_sysctl_test, "A",
"I can be here, too");
printf(" (%p) /kern dyn_sysctl\n", &clist);
/* Overlap second tree with the first. */
b_root = SYSCTL_ADD_NODE(&clist1, SYSCTL_CHILDREN(a_root),
OID_AUTO, "nextlevel", CTLFLAG_RD, 0, "one level down");
SYSCTL_ADD_STRING(&clist1, SYSCTL_CHILDREN(b_root),
OID_AUTO, "string_c1", CTLFLAG_RD, c, 0, "just to try 2");
printf("2. (%p) / dyn_sysctl (overlapping #1)\n", &clist1);
/*
* And now do something stupid. Connect another subtree to
* dynamic oid.
* WARNING: this is an example of WRONG use of dynamic sysctls.
*/
b_root=SYSCTL_ADD_NODE(&clist2, SYSCTL_CHILDREN(a_root1),
OID_AUTO, "bad", CTLFLAG_RW, 0, "dependent node");
SYSCTL_ADD_STRING(&clist2, SYSCTL_CHILDREN(b_root),
OID_AUTO, "string_c", CTLFLAG_RD, c, 0, "shouldn't panic");
printf("3. (%p) /kern/dyn_sysctl bad (WRONG!)\n", &clist2);
break;
case MOD_UNLOAD:
printf("1. Try to free ctx1 (%p): ", &clist);
if (sysctl_ctx_free(&clist) != 0)
printf("failed: expected. Need to remove ctx3 first.\n");
else
printf("HELP! sysctl_ctx_free(%p) succeeded. EXPECT PANIC!!!\n", &clist);
printf("2. Try to free ctx3 (%p): ", &clist2);
if (sysctl_ctx_free(&clist2) != 0) {
printf("sysctl_ctx_free(%p) failed!\n", &clist2);
/* Remove subtree forcefully... */
sysctl_remove_oid(b_root, 1, 1);
printf("sysctl_remove_oid(%p) succeeded\n", b_root);
} else
printf("Ok\n");
printf("3. Try to free ctx1 (%p) again: ", &clist);
if (sysctl_ctx_free(&clist) != 0) {
printf("sysctl_ctx_free(%p) failed!\n", &clist);
/* Remove subtree forcefully... */
sysctl_remove_oid(a_root1, 1, 1);
printf("sysctl_remove_oid(%p) succeeded\n", a_root1);
} else
printf("Ok\n");
printf("4. Try to free ctx2 (%p): ", &clist1);
if (sysctl_ctx_free(&clist1) != 0) {
printf("sysctl_ctx_free(%p) failed!\n", &clist1);
/* Remove subtree forcefully... */
sysctl_remove_oid(a_root, 1, 1);
} else
printf("Ok\n");
break;
default:
error = EOPNOTSUPP;
break;
}
return (error);
}