1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /******************************************************************************
4 (c) 2008 NetApp. All Rights Reserved.
7 ******************************************************************************/
10 * Functions to create and manage the backchannel
13 #ifndef _LINUX_SUNRPC_BC_XPRT_H
14 #define _LINUX_SUNRPC_BC_XPRT_H
16 #include <linux/sunrpc/svcsock.h>
17 #include <linux/sunrpc/xprt.h>
18 #include <linux/sunrpc/sched.h>
20 #ifdef CONFIG_SUNRPC_BACKCHANNEL
21 struct rpc_rqst *xprt_lookup_bc_request(struct rpc_xprt *xprt, __be32 xid);
22 void xprt_complete_bc_request(struct rpc_rqst *req, uint32_t copied);
23 void xprt_init_bc_request(struct rpc_rqst *req, struct rpc_task *task);
24 void xprt_free_bc_request(struct rpc_rqst *req);
25 int xprt_setup_backchannel(struct rpc_xprt *, unsigned int min_reqs);
26 void xprt_destroy_backchannel(struct rpc_xprt *, unsigned int max_reqs);
28 /* Socket backchannel transport methods */
29 int xprt_setup_bc(struct rpc_xprt *xprt, unsigned int min_reqs);
30 void xprt_destroy_bc(struct rpc_xprt *xprt, unsigned int max_reqs);
31 void xprt_free_bc_rqst(struct rpc_rqst *req);
32 unsigned int xprt_bc_max_slots(struct rpc_xprt *xprt);
35 * Determine if a shared backchannel is in use
37 static inline bool svc_is_backchannel(const struct svc_rqst *rqstp)
39 return rqstp->rq_server->sv_bc_enabled;
42 static inline void set_bc_enabled(struct svc_serv *serv)
44 serv->sv_bc_enabled = true;
46 #else /* CONFIG_SUNRPC_BACKCHANNEL */
47 static inline int xprt_setup_backchannel(struct rpc_xprt *xprt,
48 unsigned int min_reqs)
53 static inline void xprt_destroy_backchannel(struct rpc_xprt *xprt,
54 unsigned int max_reqs)
58 static inline bool svc_is_backchannel(const struct svc_rqst *rqstp)
63 static inline void set_bc_enabled(struct svc_serv *serv)
67 static inline void xprt_free_bc_request(struct rpc_rqst *req)
70 #endif /* CONFIG_SUNRPC_BACKCHANNEL */
71 #endif /* _LINUX_SUNRPC_BC_XPRT_H */