Devices hot plugging support.

The hotplug pseudo-device passes device attachment and detachment events
to userland.  When a device attaches or detaches, the corresponding event
is queued.  The events can then be obtained from the queue through the
read(2) call on the /dev/hotplug device file. Each event consists of
event type (attach/detach), device class (DV_*) and device name (sd1 e.g.).

We have hotplug pseudo-device on alpha, amd64, i386, macppc and sparc64.
Since it was tested only on i386 other archs has it commented out
in GENERIC until tested.

The idea liked peter@ tedu@ drahn@ millert@ marco@ henning@.
Ok deraadt@.

10 files changed, 26 insertions, 10 deletions

diff --git a/sys/arch/alpha/alpha/conf.c b/sys/arch/alpha/alpha/conf.c
index 72b28e754a7..b03cb6a16fa 100644
--- a/sys/arch/alpha/alpha/conf.c
+++ b/sys/arch/alpha/alpha/conf.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: conf.c,v 1.48 2004/02/10 01:31:20 millert Exp $	*/
+/*	$OpenBSD: conf.c,v 1.49 2004/05/30 08:11:25 grange Exp $	*/
 /*	$NetBSD: conf.c,v 1.16 1996/10/18 21:26:57 cgd Exp $	*/
 
 /*-
@@ -126,6 +126,7 @@ cdev_decl(pci);
 #endif
 
 #include "systrace.h"
+#include "hotplug.h"
 
 struct cdevsw	cdevsw[] =
 {
@@ -193,6 +194,7 @@ struct cdevsw	cdevsw[] =
 	cdev_notdef(),			/* 53: ALTQ (deprecated) */
 	cdev_iop_init(NIOP, iop),	/* 54: I2O IOP control interface */
 	cdev_ptm_init(NPTY,ptm),	/* 55: pseudo-tty ptm device */
+	cdev_hotplug_init(NHOTPLUG,hotplug), /* 56: devices hot plugging */
 };
 int	nchrdev = sizeof (cdevsw) / sizeof (cdevsw[0]);
 
diff --git a/sys/arch/alpha/conf/GENERIC b/sys/arch/alpha/conf/GENERIC
index df4ac00f58b..f6b20746d82 100644
--- a/sys/arch/alpha/conf/GENERIC
+++ b/sys/arch/alpha/conf/GENERIC
@@ -1,4 +1,4 @@
-#	$OpenBSD: GENERIC,v 1.122 2004/04/18 02:26:42 pvalchev Exp $
+#	$OpenBSD: GENERIC,v 1.123 2004/05/30 08:11:26 grange Exp $
 #	$NetBSD: GENERIC,v 1.31 1996/12/03 17:25:29 cgd Exp $
 
 machine	alpha
@@ -341,3 +341,4 @@ hifn*	at pci? dev ? function ?	# Hi/fn 7751 crypto card
 #pseudo-device	raid		4	# RAIDframe disk driver
 pseudo-device	crypto		1
 pseudo-device	sequencer	1
+#pseudo-device	hotplug		1	# devices hot plugging
diff --git a/sys/arch/amd64/amd64/conf.c b/sys/arch/amd64/amd64/conf.c
index 886bfe96ec7..ffa6fb787c9 100644
--- a/sys/arch/amd64/amd64/conf.c
+++ b/sys/arch/amd64/amd64/conf.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: conf.c,v 1.5 2004/04/15 00:15:32 pvalchev Exp $	*/
+/*	$OpenBSD: conf.c,v 1.6 2004/05/30 08:11:26 grange Exp $	*/
 
 /*
  * Copyright (c) 1994, 1995 Charles M. Hannum.  All rights reserved.
@@ -190,6 +190,7 @@ cdev_decl(pci);
 #endif
 
 #include "pf.h"
+#include "hotplug.h"
 
 struct cdevsw	cdevsw[] =
 {
@@ -295,6 +296,7 @@ struct cdevsw	cdevsw[] =
  	cdev_oci_init(NBIO,bio),	/* 79: ioctl tunnel */
 	cdev_notdef(),			/* 80: gpr? XXX */
 	cdev_ptm_init(NPTY,ptm),	/* 81: pseudo-tty ptm device */
+	cdev_hotplug_init(NHOTPLUG,hotplug), /* 82: devices hot plugging */
 };
 int	nchrdev = sizeof(cdevsw) / sizeof(cdevsw[0]);
 
diff --git a/sys/arch/amd64/conf/GENERIC b/sys/arch/amd64/conf/GENERIC
index 572b6679f29..65c0c13caa5 100644
--- a/sys/arch/amd64/conf/GENERIC
+++ b/sys/arch/amd64/conf/GENERIC
@@ -1,4 +1,4 @@
-#	$OpenBSD: GENERIC,v 1.18 2004/05/29 22:12:22 tom Exp $
+#	$OpenBSD: GENERIC,v 1.19 2004/05/30 08:11:26 grange Exp $
 #
 #	GENERIC -- everything that's currently supported
 #
@@ -488,6 +488,7 @@ ises*	at pci? dev ? function ?	# Pijnenburg PCC-ISES
 #pseudo-device	sequencer	1
 #pseudo-device	raid		4	# RAIDframe disk driver
 #pseudo-device	bio		1	# ioctl multiplexing device
+#pseudo-device	hotplug		1	# devices hot plugging
 
 # mouse & keyboard multiplexor pseudo-devices
 pseudo-device	wsmux		2
diff --git a/sys/arch/i386/conf/GENERIC b/sys/arch/i386/conf/GENERIC
index 1d6972480d8..3b84018218e 100644
--- a/sys/arch/i386/conf/GENERIC
+++ b/sys/arch/i386/conf/GENERIC
@@ -1,4 +1,4 @@
-#	$OpenBSD: GENERIC,v 1.364 2004/05/28 02:32:19 deraadt Exp $
+#	$OpenBSD: GENERIC,v 1.365 2004/05/30 08:11:26 grange Exp $
 #
 #	GENERIC -- everything that's currently supported
 #
@@ -558,6 +558,7 @@ pseudo-device	mtrr		1	# Memory range attributes control
 pseudo-device	sequencer	1
 #pseudo-device	raid		4	# RAIDframe disk driver
 pseudo-device	bio		1	# ioctl multiplexing device
+pseudo-device	hotplug		1	# devices hot plugging
 
 # mouse & keyboard multiplexor pseudo-devices
 pseudo-device	wsmux		2
diff --git a/sys/arch/i386/i386/conf.c b/sys/arch/i386/i386/conf.c
index 25198bf2ebb..ec8657441bd 100644
--- a/sys/arch/i386/i386/conf.c
+++ b/sys/arch/i386/i386/conf.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: conf.c,v 1.106 2004/02/10 01:31:21 millert Exp $	*/
+/*	$OpenBSD: conf.c,v 1.107 2004/05/30 08:11:26 grange Exp $	*/
 /*	$NetBSD: conf.c,v 1.75 1996/05/03 19:40:20 christos Exp $	*/
 
 /*
@@ -201,6 +201,7 @@ cdev_decl(pci);
 #endif
 
 #include "pf.h"
+#include "hotplug.h"
 
 struct cdevsw	cdevsw[] =
 {
@@ -310,6 +311,7 @@ struct cdevsw	cdevsw[] =
  	cdev_oci_init(NBIO,bio),	/* 79: ioctl tunnel */
 	cdev_ch_init(NGPR,gpr),		/* 80: GPR400 SmartCard reader */
 	cdev_ptm_init(NPTY,ptm),	/* 81: pseudo-tty ptm device */
+	cdev_hotplug_init(NHOTPLUG,hotplug), /* 82: devices hot plugging */
 };
 int	nchrdev = sizeof(cdevsw) / sizeof(cdevsw[0]);
 
diff --git a/sys/arch/macppc/conf/GENERIC b/sys/arch/macppc/conf/GENERIC
index 055f501277f..86431edc4cf 100644
--- a/sys/arch/macppc/conf/GENERIC
+++ b/sys/arch/macppc/conf/GENERIC
@@ -1,4 +1,4 @@
-#	$OpenBSD: GENERIC,v 1.53 2004/05/10 21:29:53 drahn Exp $g
+#	$OpenBSD: GENERIC,v 1.54 2004/05/30 08:11:26 grange Exp $g
 #
 # PPC GENERIC config file
 #
@@ -247,4 +247,5 @@ ch*		at scsibus? target ? lun ?
 ss*		at scsibus? target ? lun ?
 uk*		at scsibus? target ? lun ?
 
+#pseudo-device	hotplug	1	# devices hot plugging
 pseudo-device	wsmux	2	# mouse & keyboard multiplexor
diff --git a/sys/arch/macppc/macppc/conf.c b/sys/arch/macppc/macppc/conf.c
index a4d7efd644a..a04b3bc1cbc 100644
--- a/sys/arch/macppc/macppc/conf.c
+++ b/sys/arch/macppc/macppc/conf.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: conf.c,v 1.25 2004/02/10 01:31:21 millert Exp $ */
+/*	$OpenBSD: conf.c,v 1.26 2004/05/30 08:11:26 grange Exp $ */
 
 /*
  * Copyright (c) 1997 Per Fogelstrom
@@ -144,6 +144,7 @@ cdev_decl(pci);
 
 #include "radio.h"
 #include "bktr.h"
+#include "hotplug.h"
 
 struct cdevsw cdevsw[] = {
 	cdev_cn_init(1,cn),		/* 0: virtual console */
@@ -236,6 +237,7 @@ struct cdevsw cdevsw[] = {
 	cdev_bktr_init(NBKTR,bktr),	/* 75: Bt848 video capture device */
 	cdev_radio_init(NRADIO, radio),	/* 76: generic radio I/O */
 	cdev_ptm_init(NPTY,ptm),	/* 77: pseudo-tty ptm device */
+	cdev_hotplug_init(NHOTPLUG,hotplug), /* 78: devices hot plugging */
 };
 int nchrdev = sizeof cdevsw / sizeof cdevsw[0];
 
diff --git a/sys/arch/sparc64/conf/GENERIC b/sys/arch/sparc64/conf/GENERIC
index 043f7071c18..68f903bc9b5 100644
--- a/sys/arch/sparc64/conf/GENERIC
+++ b/sys/arch/sparc64/conf/GENERIC
@@ -1,4 +1,4 @@
-#	$OpenBSD: GENERIC,v 1.91 2004/04/18 02:26:43 pvalchev Exp $
+#	$OpenBSD: GENERIC,v 1.92 2004/05/30 08:11:26 grange Exp $
 # 	$NetBSD: GENERIC32,v 1.18 2001/07/20 00:07:12 eeh Exp $
 
 machine		sparc64
@@ -284,5 +284,7 @@ creator*	at mainbus0
 creator*	at upa0
 wsdisplay*	at creator?
 
+#pseudo-device	hotplug	1			# devices hot plugging
+
 # mouse & keyboard multiplexor pseudo-devices
 #pseudo-device	wsmux 	2
diff --git a/sys/arch/sparc64/sparc64/conf.c b/sys/arch/sparc64/sparc64/conf.c
index 6a839aabadf..60a905c1f63 100644
--- a/sys/arch/sparc64/sparc64/conf.c
+++ b/sys/arch/sparc64/sparc64/conf.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: conf.c,v 1.37 2004/02/10 01:31:21 millert Exp $	*/
+/*	$OpenBSD: conf.c,v 1.38 2004/05/30 08:11:26 grange Exp $	*/
 /*	$NetBSD: conf.c,v 1.17 2001/03/26 12:33:26 lukem Exp $ */
 
 /*
@@ -121,6 +121,7 @@ cdev_decl(xfs_dev);
 #include "inet.h"
 
 #include "systrace.h"
+#include "hotplug.h"
 
 struct bdevsw	bdevsw[] =
 {
@@ -292,6 +293,7 @@ struct cdevsw	cdevsw[] =
 	cdev_disk_init(NRAID,raid),	/* 121: RAIDframe disk driver */
 	cdev_tty_init(NPCONS,pcons),	/* 122: PROM console */
 	cdev_ptm_init(NPTY,ptm),	/* 123: pseudo-tty ptm device */
+	cdev_hotplug_init(NHOTPLUG,hotplug), /* 124: devices hot plugging */
 };
 int	nchrdev = sizeof(cdevsw) / sizeof(cdevsw[0]);