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Linux/net/sunrpc/sunrpc.h

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  1 /******************************************************************************
  2 
  3 (c) 2008 NetApp.  All Rights Reserved.
  4 
  5 NetApp provides this source code under the GPL v2 License.
  6 The GPL v2 license is available at
  7 http://opensource.org/licenses/gpl-license.php.
  8 
  9 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 10 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 11 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 12 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 13 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 14 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 15 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 16 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 17 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 18 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 19 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 20 
 21 ******************************************************************************/
 22 
 23 /*
 24  * Functions and macros used internally by RPC
 25  */
 26 
 27 #ifndef _NET_SUNRPC_SUNRPC_H
 28 #define _NET_SUNRPC_SUNRPC_H
 29 
 30 #include <linux/net.h>
 31 
 32 /*
 33  * Header for dynamically allocated rpc buffers.
 34  */
 35 struct rpc_buffer {
 36         size_t  len;
 37         char    data[];
 38 };
 39 
 40 static inline int rpc_reply_expected(struct rpc_task *task)
 41 {
 42         return (task->tk_msg.rpc_proc != NULL) &&
 43                 (task->tk_msg.rpc_proc->p_decode != NULL);
 44 }
 45 
 46 static inline int sock_is_loopback(struct sock *sk)
 47 {
 48         struct dst_entry *dst;
 49         int loopback = 0;
 50         rcu_read_lock();
 51         dst = rcu_dereference(sk->sk_dst_cache);
 52         if (dst && dst->dev &&
 53             (dst->dev->features & NETIF_F_LOOPBACK))
 54                 loopback = 1;
 55         rcu_read_unlock();
 56         return loopback;
 57 }
 58 
 59 int svc_send_common(struct socket *sock, struct xdr_buf *xdr,
 60                     struct page *headpage, unsigned long headoffset,
 61                     struct page *tailpage, unsigned long tailoffset);
 62 
 63 int rpc_clients_notifier_register(void);
 64 void rpc_clients_notifier_unregister(void);
 65 #endif /* _NET_SUNRPC_SUNRPC_H */
 66 
 67 

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