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authorFred Herard <fred.herard@oracle.com>2018-11-21 12:04:43 -0500
committerMartin K. Petersen <martin.petersen@oracle.com>2018-12-20 20:03:55 -0500
commitc2332b004907229b19a5687004290464df7c3e9d (patch)
treebfd5c17b19cb21a92a6fe616b873ac4f6eb6e60a /drivers/scsi/libiscsi_tcp.c
parent4c5765e4851008812488686619e8592783b28b33 (diff)
scsi: iscsi: Capture iscsi debug messages using tracepoints
This commit enhances iscsi initiator modules to capture iscsi debug messages using linux kernel tracepoint facility: https://www.kernel.org/doc/Documentation/trace/tracepoints.txt The following tracepoint events have been created under the iscsi tracepoint event group: iscsi_dbg_conn - to capture connection debug messages (libiscsi module) iscsi_dbg_session - to capture session debug messages (libiscsi module) iscsi_dbg_eh - to capture error handling debug messages (libiscsi module) iscsi_dbg_tcp - to capture iscsi tcp debug messages (libiscsi_tcp module) iscsi_dbg_sw_tcp - to capture iscsi sw tcp debug messages (iscsi_tcp module) iscsi_dbg_trans_session - to cpature iscsi transsport sess debug messages (scsi_transport_iscsi module) iscsi_dbg_trans_conn - to capture iscsi transport conn debug messages (scsi_transport_iscsi module) [mkp: typos] Signed-off-by: Fred Herard <fred.herard@oracle.com> Reviewed-by: Rajan Shanmugavelu <rajan.shanmugavelu@oracle.com> Reviewed-by: Lee Duncan <lduncan@suse.com> Reviewed-by: Douglas Gilbert <dgilbert@interlog.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/libiscsi_tcp.c')
-rw-r--r--drivers/scsi/libiscsi_tcp.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/scsi/libiscsi_tcp.c b/drivers/scsi/libiscsi_tcp.c
index 4fcb9e65be57..8a6b1b3f8277 100644
--- a/drivers/scsi/libiscsi_tcp.c
+++ b/drivers/scsi/libiscsi_tcp.c
@@ -43,6 +43,7 @@
#include <scsi/scsi_host.h>
#include <scsi/scsi.h>
#include <scsi/scsi_transport_iscsi.h>
+#include <trace/events/iscsi.h>
#include "iscsi_tcp.h"
@@ -65,6 +66,9 @@ MODULE_PARM_DESC(debug_libiscsi_tcp, "Turn on debugging for libiscsi_tcp "
iscsi_conn_printk(KERN_INFO, _conn, \
"%s " dbg_fmt, \
__func__, ##arg); \
+ iscsi_dbg_trace(trace_iscsi_dbg_tcp, \
+ &(_conn)->cls_conn->dev, \
+ "%s " dbg_fmt, __func__, ##arg);\
} while (0);
static int iscsi_tcp_hdr_recv_done(struct iscsi_tcp_conn *tcp_conn,