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Index: head/sys/cam/ata/ata_xpt.c
===================================================================
--- head/sys/cam/ata/ata_xpt.c
+++ head/sys/cam/ata/ata_xpt.c
@@ -40,6 +40,7 @@
#include <sys/interrupt.h>
#include <sys/sbuf.h>
+#include <sys/eventhandler.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/sysctl.h>
@@ -872,12 +873,24 @@
{
struct ccb_pathinq cpi;
int16_t *ptr;
+ int veto = 0;
ident_buf = &softc->ident_data;
for (ptr = (int16_t *)ident_buf;
ptr < (int16_t *)ident_buf + sizeof(struct ata_params)/2; ptr++) {
*ptr = le16toh(*ptr);
}
+
+ /*
+ * Allow others to veto this ATA disk attachment. This
+ * is mainly used by VMs, whose disk controllers may
+ * share the disks with the simulated ATA controllers.
+ */
+ EVENTHANDLER_INVOKE(ada_probe_veto, path, ident_buf, &veto);
+ if (veto) {
+ goto device_fail;
+ }
+
if (strncmp(ident_buf->model, "FX", 2) &&
strncmp(ident_buf->model, "NEC", 3) &&
strncmp(ident_buf->model, "Pioneer", 7) &&
Index: head/sys/sys/eventhandler.h
===================================================================
--- head/sys/sys/eventhandler.h
+++ head/sys/sys/eventhandler.h
@@ -270,4 +270,11 @@
EVENTHANDLER_DECLARE(register_framebuffer, register_framebuffer_fn);
EVENTHANDLER_DECLARE(unregister_framebuffer, unregister_framebuffer_fn);
+/* Veto ada attachment */
+struct cam_path;
+struct ata_params;
+typedef void (*ada_probe_veto_fn)(void *, struct cam_path *,
+ struct ata_params *, int *);
+EVENTHANDLER_DECLARE(ada_probe_veto, ada_probe_veto_fn);
+
#endif /* _SYS_EVENTHANDLER_H_ */

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