tree: Add cntrltype and dctype to the controller object

The Discovery Controller Type (dctype) is a new attribute defined
in TP8010. This new attribute, as well as the existing Controller
Type (cntrltype) attributes will now be exposed through the sysfs
starting with kernel 5.18. For older kernels, the cntrltype and
dctype must be retrieved by performing a Identify command.

Signed-off-by: Martin Belanger <[email protected]>
[dwagner: Removed nvme_fetch_cntrltype_dctype_from_id]
Signed-off-by: Daniel Wagner <[email protected]>

Author: Martin Belanger

src/nvme/private.h

@@ -80,6 +80,8 @@ struct nvme_ctrl {
 	char *traddr;
 	char *trsvcid;
 	char *dhchap_key;
+	char *cntrltype;
+	char *dctype;
 	bool discovery_ctrl;
 	bool discovered;
 	bool persistent;

src/nvme/tree.c

@@ -860,6 +860,8 @@ void nvme_deconfigure_ctrl(nvme_ctrl_t c)
 	FREE_CTRL_ATTR(c->serial);
 	FREE_CTRL_ATTR(c->sqsize);
 	FREE_CTRL_ATTR(c->address);
+	FREE_CTRL_ATTR(c->dctype);
+	FREE_CTRL_ATTR(c->cntrltype);
 }
 
 int nvme_disconnect_ctrl(nvme_ctrl_t c)
@@ -1129,6 +1131,9 @@ static int nvme_configure_ctrl(nvme_root_t r, nvme_ctrl_t c, const char *path,
 		free(c->dhchap_key);
 		c->dhchap_key = NULL;
 	}
+	c->cntrltype = nvme_get_ctrl_attr(c, "cntrltype");
+	c->dctype = nvme_get_ctrl_attr(c, "dctype");
+
 	return 0;
 }