nvmet: parse fabrics commands on io queues

Some fabrics commands can be sent via io queues, so add a new
function nvmet_parse_fabrics_io_cmd() and rename the existing
nvmet_parse_fabrics_cmd() to nvmet_parse_fabrics_admin_cmd().
Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

drivers/nvme/target/admin-cmd.c

@@ -1017,7 +1017,7 @@ u16 nvmet_parse_admin_cmd(struct nvmet_req *req)
 	u16 ret;
 
 	if (nvme_is_fabrics(cmd))
-		return nvmet_parse_fabrics_cmd(req);
+		return nvmet_parse_fabrics_admin_cmd(req);
 	if (nvmet_is_disc_subsys(nvmet_req_subsys(req)))
 		return nvmet_parse_discovery_cmd(req);
 

drivers/nvme/target/core.c

@@ -865,8 +865,12 @@ static inline u16 nvmet_io_cmd_check_access(struct nvmet_req *req)
 
 static u16 nvmet_parse_io_cmd(struct nvmet_req *req)
 {
+	struct nvme_command *cmd = req->cmd;
 	u16 ret;
 
+	if (nvme_is_fabrics(cmd))
+		return nvmet_parse_fabrics_io_cmd(req);
+
 	ret = nvmet_check_ctrl_status(req);
 	if (unlikely(ret))
 		return ret;

drivers/nvme/target/fabrics-cmd.c

@@ -82,7 +82,7 @@ static void nvmet_execute_prop_get(struct nvmet_req *req)
 	nvmet_req_complete(req, status);
 }
 
-u16 nvmet_parse_fabrics_cmd(struct nvmet_req *req)
+u16 nvmet_parse_fabrics_admin_cmd(struct nvmet_req *req)
 {
 	struct nvme_command *cmd = req->cmd;
 
@@ -103,6 +103,21 @@ u16 nvmet_parse_fabrics_cmd(struct nvmet_req *req)
 	return 0;
 }
 
+u16 nvmet_parse_fabrics_io_cmd(struct nvmet_req *req)
+{
+	struct nvme_command *cmd = req->cmd;
+
+	switch (cmd->fabrics.fctype) {
+	default:
+		pr_debug("received unknown capsule type 0x%x\n",
+			cmd->fabrics.fctype);
+		req->error_loc = offsetof(struct nvmf_common_command, fctype);
+		return NVME_SC_INVALID_OPCODE | NVME_SC_DNR;
+	}
+
+	return 0;
+}
+
 static u16 nvmet_install_queue(struct nvmet_ctrl *ctrl, struct nvmet_req *req)
 {
 	struct nvmf_connect_command *c = &req->cmd->connect;

drivers/nvme/target/nvmet.h

@@ -420,7 +420,8 @@ u16 nvmet_file_parse_io_cmd(struct nvmet_req *req);
 u16 nvmet_bdev_zns_parse_io_cmd(struct nvmet_req *req);
 u16 nvmet_parse_admin_cmd(struct nvmet_req *req);
 u16 nvmet_parse_discovery_cmd(struct nvmet_req *req);
-u16 nvmet_parse_fabrics_cmd(struct nvmet_req *req);
+u16 nvmet_parse_fabrics_admin_cmd(struct nvmet_req *req);
+u16 nvmet_parse_fabrics_io_cmd(struct nvmet_req *req);
 
 bool nvmet_req_init(struct nvmet_req *req, struct nvmet_cq *cq,
 		struct nvmet_sq *sq, const struct nvmet_fabrics_ops *ops);