36 unsigned int xprt_bc_max_slots(struct rpc_xprt *xprt)  in xprt_bc_max_slots()  argument
45 static inline int xprt_need_to_requeue(struct rpc_xprt *xprt)  in xprt_need_to_requeue()  argument
47 	return xprt->bc_alloc_count < xprt->bc_alloc_max;  in xprt_need_to_requeue()
90 struct rpc_rqst *xprt_alloc_bc_req(struct rpc_xprt *xprt, gfp_t gfp_flags)  in xprt_alloc_bc_req()  argument
99 	req->rq_xprt = xprt;  in xprt_alloc_bc_req()
138 int xprt_setup_backchannel(struct rpc_xprt *xprt, unsigned int min_reqs)  in xprt_setup_backchannel()  argument
140 	if (!xprt->ops->bc_setup)  in xprt_setup_backchannel()
142 	return xprt->ops->bc_setup(xprt, min_reqs);  in xprt_setup_backchannel()
146 int xprt_setup_bc(struct rpc_xprt *xprt, unsigned int min_reqs)  in xprt_setup_bc()  argument
168 		req = xprt_alloc_bc_req(xprt, GFP_KERNEL);  in xprt_setup_bc()
182 	spin_lock(&xprt->bc_pa_lock);  in xprt_setup_bc()
183 	list_splice(&tmp_list, &xprt->bc_pa_list);  in xprt_setup_bc()
184 	xprt->bc_alloc_count += min_reqs;  in xprt_setup_bc()
185 	xprt->bc_alloc_max += min_reqs;  in xprt_setup_bc()
186 	atomic_add(min_reqs, &xprt->bc_slot_count);  in xprt_setup_bc()
187 	spin_unlock(&xprt->bc_pa_lock);  in xprt_setup_bc()
217 void xprt_destroy_backchannel(struct rpc_xprt *xprt, unsigned int max_reqs)  in xprt_destroy_backchannel()  argument
219 	if (xprt->ops->bc_destroy)  in xprt_destroy_backchannel()
220 		xprt->ops->bc_destroy(xprt, max_reqs);  in xprt_destroy_backchannel()
224 void xprt_destroy_bc(struct rpc_xprt *xprt, unsigned int max_reqs)  in xprt_destroy_bc()  argument
233 	spin_lock_bh(&xprt->bc_pa_lock);  in xprt_destroy_bc()
234 	xprt->bc_alloc_max -= min(max_reqs, xprt->bc_alloc_max);  in xprt_destroy_bc()
235 	list_for_each_entry_safe(req, tmp, &xprt->bc_pa_list, rq_bc_pa_list) {  in xprt_destroy_bc()
239 		xprt->bc_alloc_count--;  in xprt_destroy_bc()
240 		atomic_dec(&xprt->bc_slot_count);  in xprt_destroy_bc()
244 	spin_unlock_bh(&xprt->bc_pa_lock);  in xprt_destroy_bc()
248 		list_empty(&xprt->bc_pa_list) ? "true" : "false");  in xprt_destroy_bc()
251 static struct rpc_rqst *xprt_get_bc_request(struct rpc_xprt *xprt, __be32 xid,  in xprt_get_bc_request()  argument
257 	if (list_empty(&xprt->bc_pa_list)) {  in xprt_get_bc_request()
260 		if (atomic_read(&xprt->bc_slot_count) >= BC_MAX_SLOTS)  in xprt_get_bc_request()
262 		list_add_tail(&new->rq_bc_pa_list, &xprt->bc_pa_list);  in xprt_get_bc_request()
263 		xprt->bc_alloc_count++;  in xprt_get_bc_request()
264 		atomic_inc(&xprt->bc_slot_count);  in xprt_get_bc_request()
266 	req = list_first_entry(&xprt->bc_pa_list, struct rpc_rqst,  in xprt_get_bc_request()
272 	req->rq_connect_cookie = xprt->connect_cookie;  in xprt_get_bc_request()
284 	struct rpc_xprt *xprt = req->rq_xprt;  in xprt_free_bc_request()  local
286 	xprt->ops->bc_free_rqst(req);  in xprt_free_bc_request()
291 	struct rpc_xprt *xprt = req->rq_xprt;  in xprt_free_bc_rqst()  local
295 	req->rq_connect_cookie = xprt->connect_cookie - 1;  in xprt_free_bc_rqst()
304 	spin_lock_bh(&xprt->bc_pa_lock);  in xprt_free_bc_rqst()
305 	if (xprt_need_to_requeue(xprt)) {  in xprt_free_bc_rqst()
309 		list_add_tail(&req->rq_bc_pa_list, &xprt->bc_pa_list);  in xprt_free_bc_rqst()
310 		xprt->bc_alloc_count++;  in xprt_free_bc_rqst()
311 		atomic_inc(&xprt->bc_slot_count);  in xprt_free_bc_rqst()
314 	spin_unlock_bh(&xprt->bc_pa_lock);  in xprt_free_bc_rqst()
325 	xprt_put(xprt);  in xprt_free_bc_rqst()
339 struct rpc_rqst *xprt_lookup_bc_request(struct rpc_xprt *xprt, __be32 xid)  in xprt_lookup_bc_request()  argument
344 		spin_lock(&xprt->bc_pa_lock);  in xprt_lookup_bc_request()
345 		list_for_each_entry(req, &xprt->bc_pa_list, rq_bc_pa_list) {  in xprt_lookup_bc_request()
346 			if (req->rq_connect_cookie != xprt->connect_cookie)  in xprt_lookup_bc_request()
351 		req = xprt_get_bc_request(xprt, xid, new);  in xprt_lookup_bc_request()
353 		spin_unlock(&xprt->bc_pa_lock);  in xprt_lookup_bc_request()
360 		new = xprt_alloc_bc_req(xprt, GFP_KERNEL);  in xprt_lookup_bc_request()
373 	struct rpc_xprt *xprt = req->rq_xprt;  in xprt_complete_bc_request()  local
374 	struct svc_serv *bc_serv = xprt->bc_serv;  in xprt_complete_bc_request()
376 	spin_lock(&xprt->bc_pa_lock);  in xprt_complete_bc_request()
378 	xprt->bc_alloc_count--;  in xprt_complete_bc_request()
379 	spin_unlock(&xprt->bc_pa_lock);  in xprt_complete_bc_request()
385 	xprt_get(xprt);  in xprt_complete_bc_request()