svn commit: r345727 - in head: sbin/devd sys/geom

[Pawel Jakub Dawidek]

Author: pjd
Date: Sat Mar 30 07:24:34 2019
New Revision: 345727
URL: https://svnweb.freebsd.org/changeset/base/345727

Log:
  Introduce new event SIZECHANGE within GEOM system to inform about GEOM
  providers mediasize changes.
  
  While here, use GEOM nomenclature to describe providers instead of calling
  them device nodes.
  
  Obtained from:	Fudo Security
  Tested in:	AWS

Modified:
  head/sbin/devd/devd.conf.5
  head/sys/geom/geom_dev.c

Modified: head/sbin/devd/devd.conf.5
==============================================================================
--- head/sbin/devd/devd.conf.5	Sat Mar 30 07:20:28 2019	(r345726)
+++ head/sbin/devd/devd.conf.5	Sat Mar 30 07:24:34 2019	(r345727)
@@ -41,7 +41,7 @@
 .\" ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
 .\" SOFTWARE.
 .\"
-.Dd July 20, 2018
+.Dd March 29, 2019
 .Dt DEVD.CONF 5
 .Os
 .Sh NAME
@@ -432,15 +432,19 @@ only includes disk-like devices.
 .It Li CREATE
 A
 .Xr geom 4
-device node is created.
+provider is created.
 .It Li DESTROY
 A
 .Xr geom 4
-device node is destroyed.
+provider is destroyed.
 .It Li GEOM::physpath
 The physical path of a device has changed.
 .It Li MEDIACHANGE
 Physical media has changed.
+.It Li SIZECHANGE
+A
+.Xr geom 4
+provider size has changed.
 .El
 .El
 .Pp

Modified: head/sys/geom/geom_dev.c
==============================================================================
--- head/sys/geom/geom_dev.c	Sat Mar 30 07:20:28 2019	(r345726)
+++ head/sys/geom/geom_dev.c	Sat Mar 30 07:24:34 2019	(r345727)
@@ -92,6 +92,7 @@ static g_fini_t g_dev_fini;
 static g_taste_t g_dev_taste;
 static g_orphan_t g_dev_orphan;
 static g_attrchanged_t g_dev_attrchanged;
+static g_resize_t g_dev_resize;
 
 static struct g_class g_dev_class	= {
 	.name = "DEV",
@@ -100,7 +101,8 @@ static struct g_class g_dev_class	= {
 	.fini = g_dev_fini,
 	.taste = g_dev_taste,
 	.orphan = g_dev_orphan,
-	.attrchanged = g_dev_attrchanged
+	.attrchanged = g_dev_attrchanged,
+	.resize = g_dev_resize
 };
 
 /*
@@ -300,6 +302,15 @@ g_dev_attrchanged(struct g_consumer *cp, const char *a
 		g_dev_set_physpath(cp);
 		return;
 	}
+}
+
+static void
+g_dev_resize(struct g_consumer *cp)
+{
+	char buf[SPECNAMELEN + 6];
+
+	snprintf(buf, sizeof(buf), "cdev=%s", cp->provider->name);
+	devctl_notify_f("GEOM", "DEV", "SIZECHANGE", buf, M_WAITOK);
 }
 
 struct g_provider *