87 lines
2.8 KiB
C
87 lines
2.8 KiB
C
/******************************************************************************
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(c) 2008 NetApp. All Rights Reserved.
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NetApp provides this source code under the GPL v2 License.
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The GPL v2 license is available at
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https://opensource.org/licenses/gpl-license.php.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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******************************************************************************/
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/*
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* Functions to create and manage the backchannel
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*/
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#ifndef _LINUX_SUNRPC_BC_XPRT_H
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#define _LINUX_SUNRPC_BC_XPRT_H
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#include <linux/sunrpc/svcsock.h>
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#include <linux/sunrpc/xprt.h>
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#include <linux/sunrpc/sched.h>
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#ifdef CONFIG_SUNRPC_BACKCHANNEL
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struct rpc_rqst *xprt_lookup_bc_request(struct rpc_xprt *xprt, __be32 xid);
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void xprt_complete_bc_request(struct rpc_rqst *req, uint32_t copied);
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void xprt_init_bc_request(struct rpc_rqst *req, struct rpc_task *task);
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void xprt_free_bc_request(struct rpc_rqst *req);
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int xprt_setup_backchannel(struct rpc_xprt *, unsigned int min_reqs);
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void xprt_destroy_backchannel(struct rpc_xprt *, unsigned int max_reqs);
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/* Socket backchannel transport methods */
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int xprt_setup_bc(struct rpc_xprt *xprt, unsigned int min_reqs);
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void xprt_destroy_bc(struct rpc_xprt *xprt, unsigned int max_reqs);
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void xprt_free_bc_rqst(struct rpc_rqst *req);
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unsigned int xprt_bc_max_slots(struct rpc_xprt *xprt);
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/*
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* Determine if a shared backchannel is in use
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*/
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static inline bool svc_is_backchannel(const struct svc_rqst *rqstp)
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{
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return rqstp->rq_server->sv_bc_enabled;
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}
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static inline void set_bc_enabled(struct svc_serv *serv)
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{
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serv->sv_bc_enabled = true;
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}
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#else /* CONFIG_SUNRPC_BACKCHANNEL */
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static inline int xprt_setup_backchannel(struct rpc_xprt *xprt,
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unsigned int min_reqs)
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{
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return 0;
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}
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static inline void xprt_destroy_backchannel(struct rpc_xprt *xprt,
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unsigned int max_reqs)
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{
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}
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static inline bool svc_is_backchannel(const struct svc_rqst *rqstp)
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{
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return false;
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}
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static inline void set_bc_enabled(struct svc_serv *serv)
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{
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}
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static inline void xprt_free_bc_request(struct rpc_rqst *req)
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{
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}
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#endif /* CONFIG_SUNRPC_BACKCHANNEL */
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#endif /* _LINUX_SUNRPC_BC_XPRT_H */
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