From c8bba1443573055f4836c9f3ab5638d25b8d8d5c Mon Sep 17 00:00:00 2001 From: Steffen Maier Date: Thu, 13 Nov 2014 14:59:47 +0100 Subject: [PATCH] zfcp: bring back unit sysfs attributes for automatic LUN scan Through sysfs attributes, zfcp unit objects provide a trigger for manual LUN recovery and export information for problem determination. With commit f8210e34887e1feb977a9b6b8caa086855af40c9 "[SCSI] zfcp: Allow midlayer to scan for LUNs when running in NPIV mode" and when attaching SCSI devices through this new optional method, no more zfcp unit objects are allocated for such SCSI devices. Hence, the above-mentioned trigger and information were missing. The information and context is located in SCSI transport device data since b62a8d9b45b971a67a0f8413338c230e3117dff5 "[SCSI] zfcp: Use SCSI device data zfcp_scsi_dev instead of zfcp_unit" 57c237731b92fadc7d44824276313ec330b1989b "[SCSI] zfcp: Add zfcp private struct as SCSI device driver data" Hence, introduce the trigger and the information unconditionally for all SCSI devices attached through zfcp. We prefix the attribute names with 'zfcp_' to prevent collisions and to avoid mix-ups such as with the common 'state' attribute. Since some of the new attribute views do not need zfcp_port in the ZFCP_DEFINE_SCSI_ATTR helper macro, remove zfcp_port to avoid compiler warnings on unused variable. It's easy to open code the conversion from zfcp_scsi_dev to zfcp_port for the two already existing attributes hba_id and wwpn. Signed-off-by: Steffen Maier Reviewed-by: Martin Peschke Reviewed-by: Hannes Reinecke Signed-off-by: Christoph Hellwig --- drivers/s390/scsi/zfcp_sysfs.c | 52 ++++++++++++++++++++++++++++++++-- 1 file changed, 49 insertions(+), 3 deletions(-) diff --git a/drivers/s390/scsi/zfcp_sysfs.c b/drivers/s390/scsi/zfcp_sysfs.c index 6b6641298f07..a488c09f6e25 100644 --- a/drivers/s390/scsi/zfcp_sysfs.c +++ b/drivers/s390/scsi/zfcp_sysfs.c @@ -437,16 +437,15 @@ static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev, \ { \ struct scsi_device *sdev = to_scsi_device(dev); \ struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); \ - struct zfcp_port *port = zfcp_sdev->port; \ \ return sprintf(buf, _format, _value); \ } \ static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL); ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n", - dev_name(&port->adapter->ccw_device->dev)); + dev_name(&zfcp_sdev->port->adapter->ccw_device->dev)); ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n", - (unsigned long long) port->wwpn); + (unsigned long long) zfcp_sdev->port->wwpn); static ssize_t zfcp_sysfs_scsi_fcp_lun_show(struct device *dev, struct device_attribute *attr, @@ -458,6 +457,49 @@ static ssize_t zfcp_sysfs_scsi_fcp_lun_show(struct device *dev, } static DEVICE_ATTR(fcp_lun, S_IRUGO, zfcp_sysfs_scsi_fcp_lun_show, NULL); +ZFCP_DEFINE_SCSI_ATTR(zfcp_access_denied, "%d\n", + (atomic_read(&zfcp_sdev->status) & + ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0); + +static ssize_t zfcp_sysfs_scsi_zfcp_failed_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct scsi_device *sdev = to_scsi_device(dev); + unsigned int status = atomic_read(&sdev_to_zfcp(sdev)->status); + unsigned int failed = status & ZFCP_STATUS_COMMON_ERP_FAILED ? 1 : 0; + + return sprintf(buf, "%d\n", failed); +} + +static ssize_t zfcp_sysfs_scsi_zfcp_failed_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct scsi_device *sdev = to_scsi_device(dev); + unsigned long val; + + if (kstrtoul(buf, 0, &val) || val != 0) + return -EINVAL; + + zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING); + zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED, + "syufai3"); + zfcp_erp_wait(sdev_to_zfcp(sdev)->port->adapter); + + return count; +} +static DEVICE_ATTR(zfcp_failed, S_IWUSR | S_IRUGO, + zfcp_sysfs_scsi_zfcp_failed_show, + zfcp_sysfs_scsi_zfcp_failed_store); + +ZFCP_DEFINE_SCSI_ATTR(zfcp_in_recovery, "%d\n", + (atomic_read(&zfcp_sdev->status) & + ZFCP_STATUS_COMMON_ERP_INUSE) != 0); + +ZFCP_DEFINE_SCSI_ATTR(zfcp_status, "0x%08x\n", + atomic_read(&zfcp_sdev->status)); + struct device_attribute *zfcp_sysfs_sdev_attrs[] = { &dev_attr_fcp_lun, &dev_attr_wwpn, @@ -465,6 +507,10 @@ struct device_attribute *zfcp_sysfs_sdev_attrs[] = { &dev_attr_read_latency, &dev_attr_write_latency, &dev_attr_cmd_latency, + &dev_attr_zfcp_access_denied, + &dev_attr_zfcp_failed, + &dev_attr_zfcp_in_recovery, + &dev_attr_zfcp_status, NULL }; -- 2.20.1