include/linux/sunrpc/bc_xprt.h at v4.20

tjh.dev / kernel
fork
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
fork
kernel / include / linux / sunrpc / bc_xprt.h
at v4.20 73 lines 2.5 kB view raw
wrap content
 1/******************************************************************************
 2
 3(c) 2008 NetApp.  All Rights Reserved.
 4
 5NetApp provides this source code under the GPL v2 License.
 6The GPL v2 license is available at
 7http://opensource.org/licenses/gpl-license.php.
 8
 9THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
10"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
11LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
12A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
13CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
14EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
15PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
16PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
17LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
18NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
19SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
20
21******************************************************************************/
22
23/*
24 * Functions to create and manage the backchannel
25 */
26
27#ifndef _LINUX_SUNRPC_BC_XPRT_H
28#define _LINUX_SUNRPC_BC_XPRT_H
29
30#include <linux/sunrpc/svcsock.h>
31#include <linux/sunrpc/xprt.h>
32#include <linux/sunrpc/sched.h>
33
34#ifdef CONFIG_SUNRPC_BACKCHANNEL
35struct rpc_rqst *xprt_lookup_bc_request(struct rpc_xprt *xprt, __be32 xid);
36void xprt_complete_bc_request(struct rpc_rqst *req, uint32_t copied);
37void xprt_init_bc_request(struct rpc_rqst *req, struct rpc_task *task);
38void xprt_free_bc_request(struct rpc_rqst *req);
39int xprt_setup_backchannel(struct rpc_xprt *, unsigned int min_reqs);
40void xprt_destroy_backchannel(struct rpc_xprt *, unsigned int max_reqs);
41
42/* Socket backchannel transport methods */
43int xprt_setup_bc(struct rpc_xprt *xprt, unsigned int min_reqs);
44void xprt_destroy_bc(struct rpc_xprt *xprt, unsigned int max_reqs);
45void xprt_free_bc_rqst(struct rpc_rqst *req);
46
47/*
48 * Determine if a shared backchannel is in use
49 */
50static inline int svc_is_backchannel(const struct svc_rqst *rqstp)
51{
52	if (rqstp->rq_server->sv_bc_xprt)
53		return 1;
54	return 0;
55}
56#else /* CONFIG_SUNRPC_BACKCHANNEL */
57static inline int xprt_setup_backchannel(struct rpc_xprt *xprt,
58					 unsigned int min_reqs)
59{
60	return 0;
61}
62
63static inline int svc_is_backchannel(const struct svc_rqst *rqstp)
64{
65	return 0;
66}
67
68static inline void xprt_free_bc_request(struct rpc_rqst *req)
69{
70}
71#endif /* CONFIG_SUNRPC_BACKCHANNEL */
72#endif /* _LINUX_SUNRPC_BC_XPRT_H */
73
Configure Feed

Configure Feed
