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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 /drivers/scsi/libiscsi.c | |
| parent | 4c5765e4851008812488686619e8592783b28b33 (diff) | |
| download | lwn-c2332b004907229b19a5687004290464df7c3e9d.tar.gz lwn-c2332b004907229b19a5687004290464df7c3e9d.zip | |
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.c')
| -rw-r--r-- | drivers/scsi/libiscsi.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c index 93c66ebad907..d8e0135621ad 100644 --- a/drivers/scsi/libiscsi.c +++ b/drivers/scsi/libiscsi.c @@ -40,6 +40,7 @@ #include <scsi/scsi_transport.h> #include <scsi/scsi_transport_iscsi.h> #include <scsi/libiscsi.h> +#include <trace/events/iscsi.h> static int iscsi_dbg_lib_conn; module_param_named(debug_libiscsi_conn, iscsi_dbg_lib_conn, int, @@ -68,6 +69,9 @@ MODULE_PARM_DESC(debug_libiscsi_eh, iscsi_conn_printk(KERN_INFO, _conn, \ "%s " dbg_fmt, \ __func__, ##arg); \ + iscsi_dbg_trace(trace_iscsi_dbg_conn, \ + &(_conn)->cls_conn->dev, \ + "%s " dbg_fmt, __func__, ##arg);\ } while (0); #define ISCSI_DBG_SESSION(_session, dbg_fmt, arg...) \ @@ -76,6 +80,9 @@ MODULE_PARM_DESC(debug_libiscsi_eh, iscsi_session_printk(KERN_INFO, _session, \ "%s " dbg_fmt, \ __func__, ##arg); \ + iscsi_dbg_trace(trace_iscsi_dbg_session, \ + &(_session)->cls_session->dev, \ + "%s " dbg_fmt, __func__, ##arg); \ } while (0); #define ISCSI_DBG_EH(_session, dbg_fmt, arg...) \ @@ -84,6 +91,9 @@ MODULE_PARM_DESC(debug_libiscsi_eh, iscsi_session_printk(KERN_INFO, _session, \ "%s " dbg_fmt, \ __func__, ##arg); \ + iscsi_dbg_trace(trace_iscsi_dbg_eh, \ + &(_session)->cls_session->dev, \ + "%s " dbg_fmt, __func__, ##arg); \ } while (0); inline void iscsi_conn_queue_work(struct iscsi_conn *conn) |