linux/drivers/s390/scsi
Benjamin Block 48910f8c35 scsi: zfcp: move maximum age of diagnostic buffers into a per-adapter variable
Replace the static define (ZFCP_DIAG_MAX_AGE) with a per-adapter variable
(${adapter}->diagnostics->max_age). This new variable is exported via
sysfs, along with other, already existing adapter variables, and can both
be read and written. This way users can choose how much time should pass
between refreshes of diagnostic buffers. The default value for the age
remains to be five seconds.

By setting this new variable to 0, the caching of diagnostic buffers for
userspace accesses can also be completely removed.

All diagnostic buffers of a given adapter are subject to this setting in
the same way.

Link: https://lore.kernel.org/r/b1d0977cc884b16dd4ca6418e4320c56a4c31d63.1572018132.git.bblock@linux.ibm.com
Reviewed-by: Steffen Maier <maier@linux.ibm.com>
Signed-off-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-10-28 22:16:15 -04:00
..
Makefile scsi: zfcp: diagnostics buffer caching and use for exchange port data 2019-10-28 22:16:14 -04:00
zfcp_aux.c scsi: zfcp: introduce sysfs interface for diagnostics of local SFP transceiver 2019-10-28 22:16:15 -04:00
zfcp_ccw.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
zfcp_dbf.c scsi: zfcp: silence all W=1 build warnings for existing kdoc 2018-11-15 15:01:18 -05:00
zfcp_dbf.h scsi: zfcp: silence remaining kdoc warnings in header files 2018-11-15 15:01:18 -05:00
zfcp_def.h scsi: zfcp: diagnostics buffer caching and use for exchange port data 2019-10-28 22:16:14 -04:00
zfcp_diag.c scsi: zfcp: move maximum age of diagnostic buffers into a per-adapter variable 2019-10-28 22:16:15 -04:00
zfcp_diag.h scsi: zfcp: move maximum age of diagnostic buffers into a per-adapter variable 2019-10-28 22:16:15 -04:00
zfcp_erp.c scsi: zfcp: fix GCC compiler warning emitted with -Wmaybe-uninitialized 2019-07-11 21:04:23 -04:00
zfcp_ext.h scsi: zfcp: introduce sysfs interface for diagnostics of local SFP transceiver 2019-10-28 22:16:15 -04:00
zfcp_fc.c scsi: s390: zfcp_fc: use sg helper to iterate over scatterlist 2019-06-20 15:21:33 -04:00
zfcp_fc.h scsi: zfcp: silence remaining kdoc warnings in header files 2018-11-15 15:01:18 -05:00
zfcp_fsf.c scsi: zfcp: support retrieval of SFP Data via Exchange Port Data 2019-10-28 22:16:15 -04:00
zfcp_fsf.h scsi: zfcp: support retrieval of SFP Data via Exchange Port Data 2019-10-28 22:16:15 -04:00
zfcp_qdio.c s390/qdio: make SBAL address array type-safe 2019-02-07 11:57:07 +01:00
zfcp_qdio.h scsi: zfcp: silence remaining kdoc warnings in header files 2018-11-15 15:01:18 -05:00
zfcp_reqlist.h scsi: zfcp: silence remaining kdoc warnings in header files 2018-11-15 15:01:18 -05:00
zfcp_scsi.c scsi: zfcp: signal incomplete or error for sync exchange config/port data 2019-10-28 22:16:14 -04:00
zfcp_sysfs.c scsi: zfcp: move maximum age of diagnostic buffers into a per-adapter variable 2019-10-28 22:16:15 -04:00
zfcp_unit.c scsi: zfcp: fix to prevent port_remove with pure auto scan LUNs (only sdevs) 2019-05-29 21:52:31 -04:00