[PATCH 0/3] zfcp: Enhanced tracing for debugging

[Nihar Panda <niharp@linux.ibm.com>]

This patch series enhances zfcp driver tracing capabilities to improve
debugging of FCP device issues in production environments.

The series includes:
1. Enhanced FSF status read buffer tracing with additional fields
2. PLOGI/PRLI tracing within open port responses
3. Sysfs unit add failure tracing for LUN scan debugging

These improvements help diagnose issues with:
- Unexpected open port responses in multi-initiator environments
- FCP device manual SCSI LUN scan failures
- Status read buffer analysis

Testing: Tested on z16 with tela-kernel zfcp test suite, both with
and without IO workload. All tests passed successfully.

Note: Patch 1 requires a corresponding update to the zfcpdbf tool
in the s390-tools package to display the new trace fields.


Chinmaya Kajagar (2):
  zfcp: Enhance fsf status read buffer tracing
  zfcp: trace return values of sysfs unit add store

Steffen Maier (1):
  zfcp: Trace plogi and prli within open port response as payload

 drivers/s390/scsi/zfcp_dbf.c   | 80 +++++++++++++++++++++++++++++++---
 drivers/s390/scsi/zfcp_dbf.h   | 34 ++++++++++++++-
 drivers/s390/scsi/zfcp_ext.h   |  4 +-
 drivers/s390/scsi/zfcp_fsf.h   |  4 +-
 drivers/s390/scsi/zfcp_sysfs.c | 17 +++++---
 5 files changed, 125 insertions(+), 14 deletions(-)


base-commit: 20fd1648f35399f114351b67c14ff8d3233a30e2
-- 
2.53.0