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| author | Rajan Shanmugavelu <rajan.shanmugavelu@oracle.com> | 2020-02-13 04:29:28 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2020-03-12 06:07:57 +0300 |
| commit | 598a90f2002c4c4daee24d76d24e8270c7075eef (patch) | |
| tree | f48493de9e67a1f11f70050223daede02684ba0d /include/trace | |
| parent | 779dfcf6435b9ad612a630f0cae41adedbc0190b (diff) | |
| download | linux-598a90f2002c4c4daee24d76d24e8270c7075eef.tar.xz | |
scsi: qla2xxx: add ring buffer for tracing debug logs
Having this log in a ring buffer helps to diagnose qla2xxx driver and
firmware issues instead of having to reproduce the problem with
extended_logging enabled. This saves cycles and helps when it is hard
to reproduce problem.
Link: https://lore.kernel.org/r/1581557368-32080-1-git-send-email-rajan.shanmugavelu@oracle.com
Reviewed-by: Joe Jin <joe.jin@oracle.com>
Acked-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Rajan Shanmugavelu <rajan.shanmugavelu@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'include/trace')
| -rw-r--r-- | include/trace/events/qla.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/include/trace/events/qla.h b/include/trace/events/qla.h new file mode 100644 index 000000000000..b71f680968eb --- /dev/null +++ b/include/trace/events/qla.h @@ -0,0 +1,39 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#if !defined(_TRACE_QLA_H_) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_QLA_H_ + +#include <linux/tracepoint.h> + +#undef TRACE_SYSTEM +#define TRACE_SYSTEM qla + +#define QLA_MSG_MAX 256 + +DECLARE_EVENT_CLASS(qla_log_event, + TP_PROTO(const char *buf, + struct va_format *vaf), + + TP_ARGS(buf, vaf), + + TP_STRUCT__entry( + __string(buf, buf) + __dynamic_array(char, msg, QLA_MSG_MAX) + ), + TP_fast_assign( + __assign_str(buf, buf); + vsnprintf(__get_str(msg), QLA_MSG_MAX, vaf->fmt, *vaf->va); + ), + + TP_printk("%s %s", __get_str(buf), __get_str(msg)) +); + +DEFINE_EVENT(qla_log_event, ql_dbg_log, + TP_PROTO(const char *buf, struct va_format *vaf), + TP_ARGS(buf, vaf) +); + +#endif /* _TRACE_QLA_H */ + +#define TRACE_INCLUDE_FILE qla + +#include <trace/define_trace.h> |