Steffen Maier 35e9111a1e scsi: zfcp: support SCSI_ADAPTER_RESET via scsi_host sysfs attribute host_reset ... Make use of feature introduced with v3.2 commit 2944369144 ("[SCSI] scsi: Added support for adapter and firmware reset"). The common code interface was introduced for commit 95d31262b3 ("[SCSI] qla4xxx: Added support for adapter and firmware reset"). $ echo adapter > /sys/class/scsi_host/host<N>/host_reset Example trace record formatted with zfcpdbf from s390-tools: Timestamp : ... Area : REC Subarea : 00 Level : 1 Exception : - CPU ID : .. Caller : 0x... Record ID : 1 ZFCP_DBF_REC_TRIG Tag : scshr_y SCSI sysfs host_reset yes LUN : 0xffffffffffffffff none (invalid) WWPN : 0x0000000000000000 none (invalid) D_ID : 0x00000000 none (invalid) Adapter status : 0x4500050b Port status : 0x00000000 none (invalid) LUN status : 0x00000000 none (invalid) Ready count : 0x00000001 Running count : 0x00000000 ERP want : 0x04 ZFCP_ERP_ACTION_REOPEN_ADAPTER ERP need : 0x04 ZFCP_ERP_ACTION_REOPEN_ADAPTER This is the common code equivalent to the zfcp-specific &dev_attr_adapter_failed.attr in zfcp_sysfs_adapter_attrs.attrs[]: $ echo 0 > /sys/bus/ccw/drivers/zfcp/<devbusid>/failed The unsupported case returns EOPNOTSUPP: $ echo firmware > /sys/class/scsi_host/host<N>/host_reset -bash: echo: write error: Operation not supported Example trace record formatted with zfcpdbf from s390-tools: Timestamp : ... Area : SCSI Subarea : 00 Level : 1 Exception : - CPU ID : .. Caller : 0x... Record ID : 1 Tag : scshr_n SCSI sysfs host_reset no Request ID : 0x0000000000000000 none (invalid) SCSI ID : 0xffffffff none (invalid) SCSI LUN : 0xffffffff none (invalid) SCSI LUN high : 0xffffffff none (invalid) SCSI result : 0xffffffa1 -EOPNOTSUPP==-95 SCSI retries : 0xff none (invalid) SCSI allowed : 0xff none (invalid) SCSI scribble : 0xffffffffffffffff none (invalid) SCSI opcode : ffffffff ffffffff ffffffff ffffffff none (invalid) FCP rsp inf cod: 0xff none (invalid) FCP rsp IU : 00000000 00000000 00000000 00000000 none (invalid) 00000000 00000000 For any other invalid value, common code returns EINVAL without invoking our callback: $ echo foo > /sys/class/scsi_host/host<N>/host_reset -bash: echo: write error: Invalid argument Signed-off-by: Steffen Maier <maier@linux.ibm.com> Reviewed-by: Benjamin Block <bblock@linux.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>		2018-05-18 11:28:15 -04:00
..
block	libnvdimm for 4.17	2018-04-10 10:25:57 -07:00
char	s390/defkeymap: fix global init to zero	2018-03-18 23:02:02 -07:00
cio	s390: assume diag308 set always works	2018-04-10 07:38:59 +02:00
crypto	s390/zcrypt: Support up to 256 crypto adapters.	2018-04-11 10:36:27 +02:00
net	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux	2018-04-09 09:04:10 -07:00
scsi	scsi: zfcp: support SCSI_ADAPTER_RESET via scsi_host sysfs attribute host_reset	2018-05-18 11:28:15 -04:00
virtio	virtio/s390: implement PM operations for virtio_ccw	2018-02-14 14:34:09 +02:00
Makefile	kbuild: rename built-in.o to built-in.a	2018-03-26 02:01:19 +09:00