Author: trasz
Date: Wed Feb 10 19:01:26 2016
New Revision: 295483
URL: https://svnweb.freebsd.org/changeset/base/295483
Log:
Add a kern.icl.drivers sysctl, to retrieve the list of registered
ICL drivers.
MFC after: 1 month
Sponsored by: The FreeBSD Foundation
Modified:
head/sys/dev/iscsi/icl.c
Modified: head/sys/dev/iscsi/icl.c
==============================================================================
--- head/sys/dev/iscsi/icl.c Wed Feb 10 18:54:18 2016 (r295482)
+++ head/sys/dev/iscsi/icl.c Wed Feb 10 19:01:26 2016 (r295483)
@@ -45,6 +45,7 @@ __FBSDID("$FreeBSD$");
#include <sys/mutex.h>
#include <sys/module.h>
#include <sys/queue.h>
+#include <sys/sbuf.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#include <sys/sx.h>
@@ -66,13 +67,42 @@ struct icl_softc {
TAILQ_HEAD(, icl_module) sc_modules;
};
+static int sysctl_kern_icl_drivers(SYSCTL_HANDLER_ARGS);
+static MALLOC_DEFINE(M_ICL, "icl", "iSCSI Common Layer");
+static struct icl_softc *sc;
+
SYSCTL_NODE(_kern, OID_AUTO, icl, CTLFLAG_RD, 0, "iSCSI Common Layer");
int icl_debug = 1;
SYSCTL_INT(_kern_icl, OID_AUTO, debug, CTLFLAG_RWTUN,
&icl_debug, 0, "Enable debug messages");
+SYSCTL_PROC(_kern_icl, OID_AUTO, drivers,
+ CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE,
+ NULL, 0, sysctl_kern_icl_drivers, "A",
+ "List of ICL drivers");
-static MALLOC_DEFINE(M_ICL, "icl", "iSCSI Common Layer");
-static struct icl_softc *sc;
+static int
+sysctl_kern_icl_drivers(SYSCTL_HANDLER_ARGS)
+{
+ const struct icl_module *im;
+ struct sbuf sb;
+ int error;
+
+ sbuf_new(&sb, NULL, 256, SBUF_AUTOEXTEND | SBUF_INCLUDENUL);
+
+ sx_slock(&sc->sc_lock);
+ TAILQ_FOREACH(im, &sc->sc_modules, im_next) {
+ if (im != TAILQ_FIRST(&sc->sc_modules))
+ sbuf_putc(&sb, ' ');
+ sbuf_printf(&sb, "%s", im->im_name);
+ }
+ sx_sunlock(&sc->sc_lock);
+
+ error = sbuf_finish(&sb);
+ if (error == 0)
+ error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb));
+ sbuf_delete(&sb);
+ return (error);
+}
static struct icl_module *
icl_find(const char *name)
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