From c2332b004907229b19a5687004290464df7c3e9d Mon Sep 17 00:00:00 2001 From: Fred Herard Date: Wed, 21 Nov 2018 12:04:43 -0500 Subject: 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 Reviewed-by: Rajan Shanmugavelu Reviewed-by: Lee Duncan Reviewed-by: Douglas Gilbert Signed-off-by: Martin K. Petersen --- include/trace/events/iscsi.h | 107 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 107 insertions(+) create mode 100644 include/trace/events/iscsi.h (limited to 'include/trace') diff --git a/include/trace/events/iscsi.h b/include/trace/events/iscsi.h new file mode 100644 index 000000000000..87408faf6e4e --- /dev/null +++ b/include/trace/events/iscsi.h @@ -0,0 +1,107 @@ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM iscsi + +#if !defined(_TRACE_ISCSI_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_ISCSI_H + +#include + +/* max debug message length */ +#define ISCSI_MSG_MAX 256 + +/* + * Declare tracepoint helper function. + */ +void iscsi_dbg_trace(void (*trace)(struct device *dev, struct va_format *), + struct device *dev, const char *fmt, ...); + +/* + * Declare event class for iscsi debug messages. + */ +DECLARE_EVENT_CLASS(iscsi_log_msg, + + TP_PROTO(struct device *dev, struct va_format *vaf), + + TP_ARGS(dev, vaf), + + TP_STRUCT__entry( + __string(dname, dev_name(dev) ) + __dynamic_array(char, msg, ISCSI_MSG_MAX ) + ), + + TP_fast_assign( + __assign_str(dname, dev_name(dev)); + vsnprintf(__get_str(msg), ISCSI_MSG_MAX, vaf->fmt, *vaf->va); + ), + + TP_printk("%s: %s",__get_str(dname), __get_str(msg) + ) +); + +/* + * Define event to capture iscsi connection debug messages. + */ +DEFINE_EVENT(iscsi_log_msg, iscsi_dbg_conn, + TP_PROTO(struct device *dev, struct va_format *vaf), + + TP_ARGS(dev, vaf) +); + +/* + * Define event to capture iscsi session debug messages. + */ +DEFINE_EVENT(iscsi_log_msg, iscsi_dbg_session, + TP_PROTO(struct device *dev, struct va_format *vaf), + + TP_ARGS(dev, vaf) +); + +/* + * Define event to capture iscsi error handling debug messages. + */ +DEFINE_EVENT(iscsi_log_msg, iscsi_dbg_eh, + TP_PROTO(struct device *dev, struct va_format *vaf), + + TP_ARGS(dev, vaf) +); + +/* + * Define event to capture iscsi tcp debug messages. + */ +DEFINE_EVENT(iscsi_log_msg, iscsi_dbg_tcp, + TP_PROTO(struct device *dev, struct va_format *vaf), + + TP_ARGS(dev, vaf) +); + +/* + * Define event to capture iscsi sw tcp debug messages. + */ +DEFINE_EVENT(iscsi_log_msg, iscsi_dbg_sw_tcp, + TP_PROTO(struct device *dev, struct va_format *vaf), + + TP_ARGS(dev, vaf) +); + +/* + * Define event to capture iscsi transport session debug messages. + */ +DEFINE_EVENT(iscsi_log_msg, iscsi_dbg_trans_session, + TP_PROTO(struct device *dev, struct va_format *vaf), + + TP_ARGS(dev, vaf) +); + +/* + * Define event to capture iscsi transport connection debug messages. + */ +DEFINE_EVENT(iscsi_log_msg, iscsi_dbg_trans_conn, + TP_PROTO(struct device *dev, struct va_format *vaf), + + TP_ARGS(dev, vaf) +); + +#endif /* _TRACE_ISCSI_H */ + +/* This part must be outside protection */ +#include -- cgit v1.2.3-59-g8ed1b