diff options
| -rw-r--r-- | drivers/nvdimm/region_devs.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c index 24abceda986a..53d1ba4e6d99 100644 --- a/drivers/nvdimm/region_devs.c +++ b/drivers/nvdimm/region_devs.c @@ -255,6 +255,35 @@ static ssize_t size_show(struct device *dev, } static DEVICE_ATTR_RO(size); +static ssize_t deep_flush_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct nd_region *nd_region = to_nd_region(dev); + + /* + * NOTE: in the nvdimm_has_flush() error case this attribute is + * not visible. + */ + return sprintf(buf, "%d\n", nvdimm_has_flush(nd_region)); +} + +static ssize_t deep_flush_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t len) +{ + bool flush; + int rc = strtobool(buf, &flush); + struct nd_region *nd_region = to_nd_region(dev); + + if (rc) + return rc; + if (!flush) + return -EINVAL; + nvdimm_flush(nd_region); + + return len; +} +static DEVICE_ATTR_RW(deep_flush); + static ssize_t mappings_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -479,6 +508,7 @@ static struct attribute *nd_region_attributes[] = { &dev_attr_btt_seed.attr, &dev_attr_pfn_seed.attr, &dev_attr_dax_seed.attr, + &dev_attr_deep_flush.attr, &dev_attr_read_only.attr, &dev_attr_set_cookie.attr, &dev_attr_available_size.attr, @@ -508,6 +538,17 @@ static umode_t region_visible(struct kobject *kobj, struct attribute *a, int n) if (!is_nd_pmem(dev) && a == &dev_attr_resource.attr) return 0; + if (a == &dev_attr_deep_flush.attr) { + int has_flush = nvdimm_has_flush(nd_region); + + if (has_flush == 1) + return a->mode; + else if (has_flush == 0) + return 0444; + else + return 0; + } + if (a != &dev_attr_set_cookie.attr && a != &dev_attr_available_size.attr) return a->mode; |