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libnvdimm: introduce 'flags' attribute for DIMM 'lock' and 'alias' status

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Given that we now how have two mechanisms for a DIMM to indicate that it
is locked:

    * NVDIMM_FAMILY_INTEL 'get_config_size' _DSM command

    * ACPI 6.2 Label Storage Read / Write commands

...export the generic libnvdimm DIMM status in a new 'flags' attribute.

This attribute can also reflect the 'alias' state which indicates
whether the nvdimm core is enforcing labels for aliased-region-capacity
that the given dimm is an interleave-set member.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams 2017-09-25 10:24:26 -07:00
parent 4b27db7e26
commit efbf6f50ad
1 changed files with 12 additions and 0 deletions
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12
drivers/nvdimm/dimm_devs.c
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@ -331,6 +331,17 @@ static ssize_t commands_show(struct device *dev,
} }
static DEVICE_ATTR_RO(commands); static DEVICE_ATTR_RO(commands);
static ssize_t flags_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct nvdimm *nvdimm = to_nvdimm(dev);
return sprintf(buf, "%s%s\n",
test_bit(NDD_ALIASING, &nvdimm->flags) ? "alias " : "",
test_bit(NDD_LOCKED, &nvdimm->flags) ? "lock " : "");
}
static DEVICE_ATTR_RO(flags);
static ssize_t state_show(struct device *dev, struct device_attribute *attr, static ssize_t state_show(struct device *dev, struct device_attribute *attr,
char *buf) char *buf)
{ {
@ -372,6 +383,7 @@ static DEVICE_ATTR_RO(available_slots);
static struct attribute *nvdimm_attributes[] = { static struct attribute *nvdimm_attributes[] = {
&dev_attr_state.attr, &dev_attr_state.attr,
&dev_attr_flags.attr,
&dev_attr_commands.attr, &dev_attr_commands.attr,
&dev_attr_available_slots.attr, &dev_attr_available_slots.attr,
NULL, NULL,