Revert r267961, r267973:

These changes prevent sysctl(8) from returning proper output,
such as:

 1) no output from sysctl(8)
 2) erroneously returning ENOMEM with tools like truss(1)
    or uname(1)
 truss: can not get etype: Cannot allocate memory

1 files changed, 4 insertions, 0 deletions

diff --git a/sys/cam/ctl/ctl_frontend_iscsi.c b/sys/cam/ctl/ctl_frontend_iscsi.c
index 233433784c45..62840811bc32 100644
--- a/sys/cam/ctl/ctl_frontend_iscsi.c
+++ b/sys/cam/ctl/ctl_frontend_iscsi.c
@@ -85,15 +85,19 @@ static uma_zone_t cfiscsi_data_wait_zone;
 SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0,
     "CAM Target Layer iSCSI Frontend");
 static int debug = 3;
+TUNABLE_INT("kern.cam.ctl.iscsi.debug", &debug);
 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN,
     &debug, 1, "Enable debug messages");
 static int ping_timeout = 5;
+TUNABLE_INT("kern.cam.ctl.iscsi.ping_timeout", &ping_timeout);
 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN,
     &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds");
 static int login_timeout = 60;
+TUNABLE_INT("kern.cam.ctl.iscsi.login_timeout", &login_timeout);
 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN,
     &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds");
 static int maxcmdsn_delta = 256;
+TUNABLE_INT("kern.cam.ctl.iscsi.maxcmdsn_delta", &maxcmdsn_delta);
 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RWTUN,
     &maxcmdsn_delta, 256, "Number of commands the initiator can send "
     "without confirmation");