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Petersen" Cc: linux-scsi@vger.kernel.org, linux-s390@vger.kernel.org, Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Nihar Panda Subject: [PATCH 0/3] zfcp: Enhanced tracing for debugging Date: Thu, 11 Jun 2026 07:05:22 +0200 Message-ID: <20260611050550.796772-2-niharp@linux.ibm.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260611050550.796772-1-niharp@linux.ibm.com> References: <20260611050550.796772-1-niharp@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Spam-Info: AW1haW4tMjYwNjExMDA0NyBTYWx0ZWRfXyMzHiiR/1/4o SsVhJaww+GJhJ0x2rIChG5cjWDO7zUxwl4yjISbxjv09jPF+rWVB2ANPEhzBdw5q9XZdeUpC8gX 9rYZSR6jwc2WSn2I6OKdtH+Oc5tcqGY= X-Authority-Analysis: v=2.4 cv=AYCB2XXG c=1 sm=1 tr=0 ts=6a2a4241 cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=FelO9ux0wxsA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=uAbxVGIbfxUO_5tXvNgY:22 a=dNuvw_aeVFbwVYHyqbwA:9 X-Proofpoint-GUID: gKLHCNHsqTFGgX6_-YInt72kF3zX0V2W X-Proofpoint-ORIG-GUID: gKLHCNHsqTFGgX6_-YInt72kF3zX0V2W X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNjExMDA0NyBTYWx0ZWRfX1OrjLtmltM1h Gy+bJyzcio6AerrOAWVmQCecb7J+6U9jL9sP6ubOQ0mrHYboQc/xstMDQP7KMKa69FI1S14A1te rAS2NotVtttUA4acOR19hNYya+slfv1zSPkdyJqKCr+RXguGfBFo5HJmCA4grHuyBQL0Z/zfeN8 NJgQevOdi4NqwIuuiTsj+rbNYgR9kKH/UaexttNAKq3e+Gq4VySLnrH6Bwno4/IgYvWKC/ZYPsO j8+MoWNdMEfCsuJpKGB/Miutd6a5kZfpgobGAc0VkKzeC1PTyAsb63vHW517ntUG3BOZ7LMI8St w5XZIxfHfNhQF/fh++DxlgWEqsctfP9RyRr64jYrDhUxbN/UmBvXYzu0H1gdTxcVXOLghMTefXr sfQZPkucoKdrZ/22aZTS0zUfzrLsDU292q+I2yp75Y8CX2KB2czpyVLKanVzMlKniSt9ISo3smp 75jBQMpb11R/iAir4pA== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-06-11_01,2026-06-09_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 suspectscore=0 malwarescore=0 spamscore=0 phishscore=0 lowpriorityscore=0 bulkscore=0 adultscore=0 priorityscore=1501 clxscore=1011 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606040000 definitions=main-2606110047 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