libnvdimm: infrastructure for btt devices
NVDIMM namespaces, in addition to accepting "struct bio" based requests,
also have the capability to perform byte-aligned accesses. By default
only the bio/block interface is used. However, if another driver can
make effective use of the byte-aligned capability it can claim namespace
interface and use the byte-aligned ->rw_bytes() interface.
The BTT driver is the initial first consumer of this mechanism to allow
adding atomic sector update semantics to a pmem or blk namespace. This
patch is the sysfs infrastructure to allow configuring a BTT instance
for a namespace. Enabling that BTT and performing i/o is in a
subsequent patch.
Cc: Greg KH <gregkh@linuxfoundation.org>
Cc: Neil Brown <neilb@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/nvdimm/label.c b/drivers/nvdimm/label.c
index 3414800..96526dc 100644
--- a/drivers/nvdimm/label.c
+++ b/drivers/nvdimm/label.c
@@ -666,7 +666,7 @@
/* don't allow updates that consume the last label */
if (nfree - alloc < 0 || nfree - alloc + victims < 1) {
- dev_info(&nsblk->dev, "insufficient label space\n");
+ dev_info(&nsblk->common.dev, "insufficient label space\n");
kfree(victim_map);
return -ENOSPC;
}
@@ -762,7 +762,8 @@
continue;
res = to_resource(ndd, nd_label);
res->flags &= ~DPA_RESOURCE_ADJUSTED;
- dev_vdbg(&nsblk->dev, "assign label[%d] slot: %d\n", l, slot);
+ dev_vdbg(&nsblk->common.dev, "assign label[%d] slot: %d\n",
+ l, slot);
nd_mapping->labels[l++] = nd_label;
}
nd_mapping->labels[l] = NULL;