@@ -1691,3 +1691,14 @@ void zfcp_erp_clear_lun_status(struct scsi_device *sdev, u32 mask)
atomic_set(&zfcp_sdev->erp_counter, 0);
}
+/**
+ * zfcp_erp_adapter_reset_sync() - Really reopen adapter and wait.
+ * @adapter: Pointer to zfcp_adapter to reopen.
+ * @id: Trace tag string of length %ZFCP_DBF_TAG_LEN.
+ */
+void zfcp_erp_adapter_reset_sync(struct zfcp_adapter *adapter, char *id)
+{
+ zfcp_erp_set_adapter_status(adapter, ZFCP_STATUS_COMMON_RUNNING);
+ zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, id);
+ zfcp_erp_wait(adapter);
+}
@@ -76,6 +76,7 @@ extern void zfcp_erp_thread_kill(struct zfcp_adapter *);
extern void zfcp_erp_wait(struct zfcp_adapter *);
extern void zfcp_erp_notify(struct zfcp_erp_action *, unsigned long);
extern void zfcp_erp_timeout_handler(struct timer_list *t);
+extern void zfcp_erp_adapter_reset_sync(struct zfcp_adapter *adapter, char *id);
/* zfcp_fc.c */
extern struct kmem_cache *zfcp_fc_req_cache;
@@ -372,6 +372,31 @@ static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt)
return ret;
}
+/**
+ * zfcp_scsi_sysfs_host_reset() - Support scsi_host sysfs attribute host_reset.
+ * @shost: Pointer to Scsi_Host to perform action on.
+ * @reset_type: We support %SCSI_ADAPTER_RESET but not %SCSI_FIRMWARE_RESET.
+ *
+ * Return: 0 on %SCSI_ADAPTER_RESET, -%EOPNOTSUPP otherwise.
+ *
+ * This is similar to zfcp_sysfs_adapter_failed_store().
+ */
+static int zfcp_scsi_sysfs_host_reset(struct Scsi_Host *shost, int reset_type)
+{
+ struct zfcp_adapter *adapter =
+ (struct zfcp_adapter *)shost->hostdata[0];
+ int ret = 0;
+
+ if (reset_type != SCSI_ADAPTER_RESET) {
+ ret = -EOPNOTSUPP;
+ zfcp_dbf_scsi_eh("scshr_n", adapter, ~0, ret);
+ return ret;
+ }
+
+ zfcp_erp_adapter_reset_sync(adapter, "scshr_y");
+ return ret;
+}
+
struct scsi_transport_template *zfcp_scsi_transport_template;
static struct scsi_host_template zfcp_scsi_host_template = {
@@ -387,6 +412,7 @@ static struct scsi_host_template zfcp_scsi_host_template = {
.slave_configure = zfcp_scsi_slave_configure,
.slave_destroy = zfcp_scsi_slave_destroy,
.change_queue_depth = scsi_change_queue_depth,
+ .host_reset = zfcp_scsi_sysfs_host_reset,
.proc_name = "zfcp",
.can_queue = 4096,
.this_id = -1,
@@ -200,10 +200,7 @@ static ssize_t zfcp_sysfs_adapter_failed_store(struct device *dev,
goto out;
}
- zfcp_erp_set_adapter_status(adapter, ZFCP_STATUS_COMMON_RUNNING);
- zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
- "syafai2");
- zfcp_erp_wait(adapter);
+ zfcp_erp_adapter_reset_sync(adapter, "syafai2");
out:
zfcp_ccw_adapter_put(adapter);
return retval ? retval : (ssize_t) count;
Make use of feature introduced with v3.2 commit 294436914454 ("[SCSI] scsi: Added support for adapter and firmware reset"). The common code interface was introduced for commit 95d31262b3c1 ("[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> --- drivers/s390/scsi/zfcp_erp.c | 11 +++++++++++ drivers/s390/scsi/zfcp_ext.h | 1 + drivers/s390/scsi/zfcp_scsi.c | 26 ++++++++++++++++++++++++++ drivers/s390/scsi/zfcp_sysfs.c | 5 +---- 4 files changed, 39 insertions(+), 4 deletions(-)