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author | Fred Herard <fred.herard@oracle.com> | 2018-11-21 12:04:43 -0500 |
---|---|---|
committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-12-20 20:03:55 -0500 |
commit | c2332b004907229b19a5687004290464df7c3e9d (patch) | |
tree | bfd5c17b19cb21a92a6fe616b873ac4f6eb6e60a /include/trace | |
parent | 4c5765e4851008812488686619e8592783b28b33 (diff) | |
download | linux-c2332b004907229b19a5687004290464df7c3e9d.tar.gz |
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 'include/trace')
-rw-r--r-- | include/trace/events/iscsi.h | 107 |
1 files changed, 107 insertions, 0 deletions
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 <linux/tracepoint.h> + +/* 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 <trace/define_trace.h> |