From b0b58169a73e54da2b6f2b7096e1f4e2380dfcdb Mon Sep 17 00:00:00 2001
From: dlg <dlg@openbsd.org>
Date: Tue, 22 Apr 2014 07:29:11 +0000
Subject: [PATCH] factor out the code that figures out whether you're probing
 or detaching a whole bus, a target, or a specific lun on a target from the
 bioctl and scsi_req paths.

i want to reuse this factored code for something claudio wants.
---
 sys/scsi/scsi_base.c | 26 +++----------------
 sys/scsi/scsiconf.c  | 59 ++++++++++++++++++++++++++------------------
 sys/scsi/scsiconf.h  |  4 ++-
 3 files changed, 41 insertions(+), 48 deletions(-)

diff --git a/sys/scsi/scsi_base.c b/sys/scsi/scsi_base.c
index 0487a95fc2f..769815b7cf7 100644
--- a/sys/scsi/scsi_base.c
+++ b/sys/scsi/scsi_base.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: scsi_base.c,v 1.210 2014/01/27 23:44:40 dlg Exp $	*/
+/*	$OpenBSD: scsi_base.c,v 1.211 2014/04/22 07:29:11 dlg Exp $	*/
 /*	$NetBSD: scsi_base.c,v 1.43 1997/04/02 02:29:36 mycroft Exp $	*/
 
 /*
@@ -176,17 +176,7 @@ scsi_plug_probe(void *xsc, void *xp)
 
 	pool_put(&scsi_plug_pool, p);
 
-	if (target == -1 && lun == -1)
-		scsi_probe_bus(sc);
-
-	/* specific lun and wildcard target is bad */
-	if (target == -1)
-		return;
-
-	if (lun == -1)
-		scsi_probe_target(sc, target);
-
-	scsi_probe_lun(sc, target, lun);
+	scsi_probe(sc, target, lun);
 }
 
 void
@@ -199,17 +189,7 @@ scsi_plug_detach(void *xsc, void *xp)
 
 	pool_put(&scsi_plug_pool, p);
 
-	if (target == -1 && lun == -1)
-		scsi_detach_bus(sc, how);
-
-	/* specific lun and wildcard target is bad */
-	if (target == -1)
-		return;
-
-	if (lun == -1)
-		scsi_detach_target(sc, target, how);
-
-	scsi_detach_lun(sc, target, lun, how);
+	scsi_detach(sc, target, lun, how);
 }
 
 int
diff --git a/sys/scsi/scsiconf.c b/sys/scsi/scsiconf.c
index ec60a46dd32..43dcd48922d 100644
--- a/sys/scsi/scsiconf.c
+++ b/sys/scsi/scsiconf.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: scsiconf.c,v 1.186 2014/01/31 02:53:41 dlg Exp $	*/
+/*	$OpenBSD: scsiconf.c,v 1.187 2014/04/22 07:29:11 dlg Exp $	*/
 /*	$NetBSD: scsiconf.c,v 1.57 1996/05/02 01:09:01 neil Exp $	*/
 
 /*
@@ -305,32 +305,11 @@ scsibus_bioctl(struct device *dev, u_long cmd, caddr_t addr)
 	switch (cmd) {
 	case SBIOCPROBE:
 		sdev = (struct sbioc_device *)addr;
-
-		if (sdev->sd_target == -1 && sdev->sd_lun == -1)
-			return (scsi_probe_bus(sc));
-
-		/* specific lun and wildcard target is bad */
-		if (sdev->sd_target == -1)
-			return (EINVAL);
-
-		if (sdev->sd_lun == -1)
-			return (scsi_probe_target(sc, sdev->sd_target));
-
-		return (scsi_probe_lun(sc, sdev->sd_target, sdev->sd_lun));
+		return (scsi_probe(sc, sdev->sd_target, sdev->sd_lun));
 
 	case SBIOCDETACH:
 		sdev = (struct sbioc_device *)addr;
-
-		if (sdev->sd_target == -1 && sdev->sd_lun == -1)
-			return (scsi_detach_bus(sc, 0));
-
-		if (sdev->sd_target == -1)
-			return (EINVAL);
-
-		if (sdev->sd_lun == -1)
-			return (scsi_detach_target(sc, sdev->sd_target, 0));
-
-		return (scsi_detach_lun(sc, sdev->sd_target, sdev->sd_lun, 0));
+		return (scsi_detach(sc, sdev->sd_target, sdev->sd_lun, 0));
 
 	default:
 		return (ENOTTY);
@@ -412,6 +391,22 @@ dumbscan:
 	return (0);
 }
 
+int
+scsi_probe(struct scsibus_softc *sc, int target, int lun)
+{
+	if (target == -1 && lun == -1)
+		return (scsi_probe_bus(sc));
+
+	/* specific lun and wildcard target is bad */
+	if (target == -1)
+		return (EINVAL);
+
+	if (lun == -1)
+		return (scsi_probe_target(sc, target));
+
+	return (scsi_probe_lun(sc, target, lun));
+}
+
 int
 scsi_probe_lun(struct scsibus_softc *sc, int target, int lun)
 {
@@ -440,6 +435,22 @@ scsi_detach_bus(struct scsibus_softc *sc, int flags)
 	return (rv);
 }
 
+int
+scsi_detach(struct scsibus_softc *sc, int target, int lun, int flags)
+{
+	if (target == -1 && lun == -1)
+		return (scsi_detach_bus(sc, flags));
+
+	/* specific lun and wildcard target is bad */
+	if (target == -1)
+		return (EINVAL);
+
+	if (lun == -1)
+		return (scsi_detach_target(sc, target, flags));
+
+	return (scsi_detach_lun(sc, target, lun, flags));
+}
+
 int
 scsi_detach_target(struct scsibus_softc *sc, int target, int flags)
 {
diff --git a/sys/scsi/scsiconf.h b/sys/scsi/scsiconf.h
index 511c44b3146..43cfb63916f 100644
--- a/sys/scsi/scsiconf.h
+++ b/sys/scsi/scsiconf.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: scsiconf.h,v 1.160 2014/01/31 02:53:41 dlg Exp $	*/
+/*	$OpenBSD: scsiconf.h,v 1.161 2014/04/22 07:29:11 dlg Exp $	*/
 /*	$NetBSD: scsiconf.h,v 1.35 1997/04/02 02:29:38 mycroft Exp $	*/
 
 /*
@@ -507,10 +507,12 @@ void	scsi_show_mem(u_char *, int);
 void	scsi_strvis(u_char *, u_char *, int);
 int	scsi_delay(struct scsi_xfer *, int);
 
+int	scsi_probe(struct scsibus_softc *, int, int);
 int	scsi_probe_bus(struct scsibus_softc *);
 int	scsi_probe_target(struct scsibus_softc *, int);
 int	scsi_probe_lun(struct scsibus_softc *, int, int);
 
+int	scsi_detach(struct scsibus_softc *, int, int, int);
 int	scsi_detach_bus(struct scsibus_softc *, int);
 int	scsi_detach_target(struct scsibus_softc *, int, int);
 int	scsi_detach_lun(struct scsibus_softc *, int, int, int);
-- 
2.20.1