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/include/linux/sunrpc/bc_xprt.h

https://bitbucket.org/thekraven/iscream_thunderc-2.6.35
C++ Header | 67 lines | 32 code | 8 blank | 27 comment | 1 complexity | 732158a8c5f5cf59286a6a0e44e7702d MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
 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_NFS_V4_1
35struct rpc_rqst *xprt_alloc_bc_request(struct rpc_xprt *xprt);
36void xprt_free_bc_request(struct rpc_rqst *req);
37int xprt_setup_backchannel(struct rpc_xprt *, unsigned int min_reqs);
38void xprt_destroy_backchannel(struct rpc_xprt *, int max_reqs);
39int bc_send(struct rpc_rqst *req);
40
41/*
42 * Determine if a shared backchannel is in use
43 */
44static inline int svc_is_backchannel(const struct svc_rqst *rqstp)
45{
46	if (rqstp->rq_server->bc_xprt)
47		return 1;
48	return 0;
49}
50#else /* CONFIG_NFS_V4_1 */
51static inline int xprt_setup_backchannel(struct rpc_xprt *xprt,
52					 unsigned int min_reqs)
53{
54	return 0;
55}
56
57static inline int svc_is_backchannel(const struct svc_rqst *rqstp)
58{
59	return 0;
60}
61
62static inline void xprt_free_bc_request(struct rpc_rqst *req)
63{
64}
65#endif /* CONFIG_NFS_V4_1 */
66#endif /* _LINUX_SUNRPC_BC_XPRT_H */
67