void
gvinum_stop(int argc, char **argv)
{
int err, fileid;
fileid = kldfind(GVINUMMOD);
if (fileid == -1) {
warn("cannot find " GVINUMMOD);
return;
}
/*
* This little hack prevents that we end up in an infinite loop in
* g_unload_class(). gv_unload() will return EAGAIN so that the GEOM
* event thread will be free for the g_wither_geom() call from
* gv_unload(). It's silly, but it works.
*/
printf("unloading " GVINUMMOD " kernel module... ");
fflush(stdout);
if ((err = kldunload(fileid)) != 0 && (errno == EAGAIN)) {
sleep(1);
err = kldunload(fileid);
}
if (err != 0) {
printf(" failed!\n");
warn("cannot unload " GVINUMMOD);
return;
}
printf("done\n");
exit(0);
}
/**
* Invalidate entry. For KLDs we try to unload it, for processes we SIGKILL it.
*/
static int
invalidate_swrun_entry(struct swrun_entry *entry, int commit)
{
struct kinfo_proc *plist;
int nproc;
struct kld_file_stat stat;
assert(entry != NULL);
if (entry->index >= NO_PID + 1) {
/* this is a kernel item */
HRDBG("atempt to unload KLD %d",
entry->index - NO_PID - 1);
if (entry->index == SWOSIndex) {
/* can't invalidate the kernel itself */
return (SNMP_ERR_NOT_WRITEABLE);
}
stat.version = sizeof(stat);
if (kldstat(entry->index - NO_PID - 1, &stat) == -1) {
/*
* not found, it's gone. Mark it as invalid for now, it
* will be removed from the list at next global
* refresh
*/
HRDBG("missing item with kid=%d",
entry->index - NO_PID - 1);
entry->status = (int32_t)SRS_INVALID;
return (SNMP_ERR_NOERROR);
}
/*
* There is no way to try to unload a module. There seems
* also no way to find out whether it is busy without unloading
* it. We can assume that it is busy, if the reference count
* is larger than 2, but if it is 1 nothing helps.
*/
if (!commit) {
if (stat.refs > 1)
return (SNMP_ERR_NOT_WRITEABLE);
return (SNMP_ERR_NOERROR);
}
if (kldunload(stat.id) == -1) {
syslog(LOG_ERR,"kldunload for %d/%s failed: %m",
stat.id, stat.name);
if (errno == EBUSY)
return (SNMP_ERR_NOT_WRITEABLE);
else
return (SNMP_ERR_RES_UNAVAIL);
}
} else {
/* this is a process */
assert(hr_kd != NULL);
plist = kvm_getprocs(hr_kd, KERN_PROC_PID,
entry->index - 1, &nproc);
if (plist == NULL || nproc != 1) {
HRDBG("missing item with PID=%d", entry->index - 1);
entry->status = (int32_t)SRS_INVALID;
return (SNMP_ERR_NOERROR);
}
if (IS_KERNPROC(plist)) {
/* you don't want to do this */
return (SNMP_ERR_NOT_WRITEABLE);
}
if (kill(entry->index - 1, commit ? SIGKILL : 0) < 0) {
syslog(LOG_ERR,"kill (%d, SIGKILL) failed: %m",
entry->index - 1);
if (errno == ESRCH) {
/* race: just gone */
entry->status = (int32_t)SRS_INVALID;
return (SNMP_ERR_NOERROR);
}
return (SNMP_ERR_GENERR);
}
}
return (SNMP_ERR_NOERROR);
}
