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Index: sys/kern/subr_bus.c
===================================================================
--- sys/kern/subr_bus.c
+++ sys/kern/subr_bus.c
@@ -5730,6 +5730,7 @@
case DEV_RESCAN:
case DEV_DELETE:
case DEV_RESET:
+ case DEV_GET_PATH:
error = priv_check(td, PRIV_DRIVER);
if (error == 0)
error = find_device(req, &dev);
@@ -5963,6 +5964,40 @@
error = BUS_RESET_CHILD(device_get_parent(dev), dev,
req->dr_flags);
break;
+ case DEV_GET_PATH: {
+ struct sbuf *sb;
+ char locator[64];
+ ssize_t len;
+
+ error = copyinstr(req->dr_buffer.buffer, locator, sizeof(locator), NULL);
+ if (error)
+ break;
+ printf("Please find path to %s using %s\n", device_get_nameunit(dev), locator);
+ sb = sbuf_new(NULL, NULL, 0, SBUF_AUTOEXTEND | SBUF_INCLUDENUL);
+ error = BUS_GET_DEVICE_PATH(device_get_parent(dev), dev,
+ locator, sb);
+ printf("Error = %d\n", error);
+ sbuf_finish(sb);
+ if (error == 0) {
+ len = sbuf_len(sb);
+ if (len < 0) {
+ printf("no mem\n");
+ error = ENOMEM;
+ } else if (req->dr_buffer.length < len) {
+ printf("too short %zd vs %zd\n",
+ req->dr_buffer.length, len);
+ req->dr_buffer.length = len;
+ error = ENAMETOOLONG;
+ } else {
+ req->dr_buffer.length = len;
+ printf("Found it! len = %zd, path = %s\n", len, sbuf_data(sb));
+ error = copyout(sbuf_data(sb),
+ req->dr_buffer.buffer, len);
+ }
+ }
+ sbuf_delete(sb);
+ break;
+ }
}
mtx_unlock(&Giant);
return (error);
Index: sys/sys/bus.h
===================================================================
--- sys/sys/bus.h
+++ sys/sys/bus.h
@@ -130,6 +130,7 @@
#define DEV_FREEZE _IOW('D', 11, struct devreq)
#define DEV_THAW _IOW('D', 12, struct devreq)
#define DEV_RESET _IOW('D', 13, struct devreq)
+#define DEV_GET_PATH _IOWR('D', 14, struct devreq)
/* Flags for DEV_DETACH and DEV_DISABLE. */
#define DEVF_FORCE_DETACH 0x0000001

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