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Add a kern.icl.drivers sysctl, to retrieve the list of registered

Browse source 
ICL drivers.

MFC after:	1 month
Sponsored by:	The FreeBSD Foundation
This commit is contained in:
Edward Tomasz Napierala 2016-02-10 19:01:26 +00:00
parent b4b12e52fb
commit 099ad7abd0
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=295483
1 changed files with 32 additions and 2 deletions
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34
sys/dev/iscsi/icl.c
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@ -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)