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Commit efbf6f50 authored by Dan Williams's avatar Dan Williams
Browse files

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



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: default avatarDan Williams <dan.j.williams@intel.com>
parent 4b27db7e

drivers/nvdimm/dimm_devs.c

+12 −0
Original line number Diff line number Diff line
@@ -331,6 +331,17 @@ static ssize_t commands_show(struct device *dev, 
}

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,

		char *buf)

{
@@ -372,6 +383,7 @@ static DEVICE_ATTR_RO(available_slots); 


static struct attribute *nvdimm_attributes[] = {

	&dev_attr_state.attr,

	&dev_attr_flags.attr,

	&dev_attr_commands.attr,

	&dev_attr_available_slots.attr,

	NULL,