diff options
Diffstat (limited to 'include/linux/sunrpc/bc_xprt.h')
| -rw-r--r-- | include/linux/sunrpc/bc_xprt.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/include/linux/sunrpc/bc_xprt.h b/include/linux/sunrpc/bc_xprt.h new file mode 100644 index 000000000..2ca67b55e --- /dev/null +++ b/include/linux/sunrpc/bc_xprt.h @@ -0,0 +1,68 @@ +/****************************************************************************** + +(c) 2008 NetApp. All Rights Reserved. + +NetApp provides this source code under the GPL v2 License. +The GPL v2 license is available at +http://opensource.org/licenses/gpl-license.php. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR +CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, +EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, +PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR +PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF +LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING +NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +******************************************************************************/ + +/* + * Functions to create and manage the backchannel + */ + +#ifndef _LINUX_SUNRPC_BC_XPRT_H +#define _LINUX_SUNRPC_BC_XPRT_H + +#include <linux/sunrpc/svcsock.h> +#include <linux/sunrpc/xprt.h> +#include <linux/sunrpc/sched.h> + +#ifdef CONFIG_SUNRPC_BACKCHANNEL +struct rpc_rqst *xprt_lookup_bc_request(struct rpc_xprt *xprt, __be32 xid); +void xprt_complete_bc_request(struct rpc_rqst *req, uint32_t copied); +void xprt_free_bc_request(struct rpc_rqst *req); +int xprt_setup_backchannel(struct rpc_xprt *, unsigned int min_reqs); +void xprt_destroy_backchannel(struct rpc_xprt *, unsigned int max_reqs); +int bc_send(struct rpc_rqst *req); + +/* + * Determine if a shared backchannel is in use + */ +static inline int svc_is_backchannel(const struct svc_rqst *rqstp) +{ + if (rqstp->rq_server->sv_bc_xprt) + return 1; + return 0; +} +#else /* CONFIG_SUNRPC_BACKCHANNEL */ +static inline int xprt_setup_backchannel(struct rpc_xprt *xprt, + unsigned int min_reqs) +{ + return 0; +} + +static inline int svc_is_backchannel(const struct svc_rqst *rqstp) +{ + return 0; +} + +static inline void xprt_free_bc_request(struct rpc_rqst *req) +{ +} +#endif /* CONFIG_SUNRPC_BACKCHANNEL */ +#endif /* _LINUX_SUNRPC_BC_XPRT_H */ + |