diff options
| author | Chinmaya Kajagar <chinmayk@linux.ibm.com> | 2026-07-28 06:48:57 +0200 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2026-07-28 22:15:05 -0400 |
| commit | dff03860a722e7f1d0a10bb22628d7896bd4b5ec (patch) | |
| tree | 2f1561ca7c1fbed5022c6275efd3fe644db587ce /tools/perf/scripts/python/stackcollapse.py | |
| parent | 3efec904df6f7b0ca9e6267e9aea543402f01886 (diff) | |
scsi: zfcp: Trace return values of sysfs unit add store
sysfs unit add failures are seen during FCP devices manual SCSI LUN scans,
indicating the kernel cannot add a LUN, usually because the device is
offline, already exists, no memory or the target port is incorrectly
configured.
Add a new trace to debug zfcp sysfs unit add failures with tag id
ZFCP_DBF_HBA_UAS. This traces wwpn, fcp lun id, return value (error
condition) and associated hba of the device.
Typical unit add store failures as seen below example syslog messages,
Feb 2 10:47:25 systemd-udevd[823]: rport-1:0-2: /etc/udev/
rules.d/41-zfcp-lun-0.0.50c0:0x500507680b26c449:0x01d2000000000000.rules:10
Failed to write ATTR{/sys/devices/css0/0.0.0015/0.0.50c0/0x500507680b26c449
/unit_add}, ignoring: File exists
Feb 2 10:50:03 systemd-udevd[801]: rport-2:0-3: /etc/udev/
rules.d/41-zfcp-lun-0.0.50c0:0x500507680b26c448:0x01d2000000000000.rules:10
Failed to write ATTR{/sys/devices/css0/0.0.0015/0.0.50c0/0x500507680b26c448
/unit_add}, ignoring: Cannot allocate memory
Example zfcpdbf traces for both the errors:
Timestamp : 2026-03-05-07:28:34:029797
Area : HBA
Subarea : 00
Level : 3
Exception : -
CPU ID : 0002
Caller : 0x000001fe345e6d0e
Record ID : 6
Tag : syuast2
Description : syuast2 HBA, unit add, failed, unable to add unit
Request ID : 0x00000000ffffffff
Request status : 0xffffffff
FSF cmnd : 0xffffffff
FSF sequence no: 0xffffffff
WWPN : 0x500507680b25c448
LUN : 0x01d3000000000000
Return Value : 0xfffffff4
Timestamp : 2026-03-05-07:33:04:151807 <== the last record
Area : HBA
Subarea : 00
Level : 3
Exception : -
CPU ID : 0002
Caller : 0x000001fe345e6d0e
Record ID : 6
Tag : syuast2
Description : syuast2 HBA, unit add, failed, unable to add unit
Request ID : 0x00000000ffffffff
Request status : 0xffffffff
FSF cmnd : 0xffffffff
FSF sequence no: 0xffffffff
WWPN : 0x500507680b25c449
LUN : 0x01d0000000000000
Return Value : 0xfffffff4
Link: https://patch.msgid.link/20260728044857.2532646-4-niharp@linux.ibm.com
Signed-off-by: Chinmaya Kajagar <chinmayk@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions