diff options
Diffstat (limited to 'drivers/nvme/host/sysfs.c')
| -rw-r--r-- | drivers/nvme/host/sysfs.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/nvme/host/sysfs.c b/drivers/nvme/host/sysfs.c index ff603a9d7b8c..933a5adfb7af 100644 --- a/drivers/nvme/host/sysfs.c +++ b/drivers/nvme/host/sysfs.c @@ -1175,17 +1175,52 @@ static ssize_t reset_count_store(struct device *dev, return count; } +static ssize_t reconnect_count_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct nvme_ctrl *ctrl = dev_get_drvdata(dev); + + return sysfs_emit(buf, "%lu\n", + atomic_long_read(&ctrl->acc_reconnects) + + ctrl->nr_reconnects); +} + +static ssize_t reconnect_count_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + int err; + unsigned long reconnect_cnt; + struct nvme_ctrl *ctrl = dev_get_drvdata(dev); + + err = kstrtoul(buf, 0, &reconnect_cnt); + if (err) + return -EINVAL; + + atomic_long_set(&ctrl->acc_reconnects, reconnect_cnt); + + return count; +} + +static DEVICE_ATTR_RW(reconnect_count); + static DEVICE_ATTR_RW(reset_count); static struct attribute *nvme_dev_diag_attrs[] = { &dev_attr_adm_errors.attr, &dev_attr_reset_count.attr, + &dev_attr_reconnect_count.attr, NULL, }; static umode_t nvme_dev_diag_attrs_are_visible(struct kobject *kobj, struct attribute *a, int n) { + struct device *dev = container_of(kobj, struct device, kobj); + struct nvme_ctrl *ctrl = dev_get_drvdata(dev); + + if (a == &dev_attr_reconnect_count.attr && !ctrl->opts) + return 0; + return a->mode; } |