FreeBSD/Linux Kernel Cross Reference
sys/nlm/nlm.h

     /*-
      * Copyright (c) 2008 Isilon Inc http://www.isilon.com/
      * Authors: Doug Rabson <dfr@rabson.org>
      * Developed with Red Inc: Alfred Perlstein <alfred@freebsd.org>
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
     *
     * $FreeBSD$
     */
    
    #ifndef _NLM_NLM_H_
    #define _NLM_NLM_H_
    
    #ifdef _KERNEL
    
    #ifdef _SYS_MALLOC_H_
    MALLOC_DECLARE(M_NLM);
    #endif
    
    struct nlm_host;
    
    /*
     * Copy a struct netobj.
     */ 
    extern void nlm_copy_netobj(struct netobj *dst, struct netobj *src,
        struct malloc_type *type);
    
    /*
     * Search for an existing NLM host that matches the given name
     * (typically the caller_name element of an nlm4_lock).  If none is
     * found, create a new host. If 'rqstp' is non-NULL, record the remote
     * address of the host so that we can call it back for async
     * responses.
     */
    extern struct nlm_host *nlm_find_host_by_name(const char *name,
        struct svc_req *rqstp);
    
    /*
     * Search for an existing NLM host that matches the given remote
     * address. If none is found, create a new host with the requested
     * address and remember 'vers' as the NLM protocol version to use for
     * that host.
     */
    extern struct nlm_host *nlm_find_host_by_addr(const struct sockaddr *addr,
        int vers);
    
    /*
     * Return an RPC client handle that can be used to talk to the NLM
     * running on the given host.
     */
    extern CLIENT *nlm_host_get_rpc(struct nlm_host *host);
    
    /*
     * Called when a host restarts.
     */
    extern void nlm_sm_notify(nlm_sm_status *argp);
    
    /*
     * Implementation for lock testing RPCs. Returns the NLM host that
     * matches the RPC arguments.
     */
    extern struct nlm_host *nlm_do_test(nlm4_testargs *argp,
        nlm4_testres *result, struct svc_req *rqstp);
    
    /*
     * Implementation for lock setting RPCs. Returns the NLM host that
     * matches the RPC arguments. If monitor is TRUE, set up an NSM
     * monitor for this host.
     */
    extern struct nlm_host *nlm_do_lock(nlm4_lockargs *argp,
        nlm4_res *result, struct svc_req *rqstp, bool_t monitor); 
    
    /*
     * Implementation for cancelling a pending lock request. Returns the
     * NLM host that matches the RPC arguments.
     */
    extern struct nlm_host *nlm_do_cancel(nlm4_cancargs *argp,
        nlm4_res *result, struct svc_req *rqstp);
    
    /*
    * Implementation for unlocking RPCs. Returns the NLM host that
    * matches the RPC arguments.
    */
   extern struct nlm_host *nlm_do_unlock(nlm4_unlockargs *argp,
       nlm4_res *result, struct svc_req *rqstp);
   
   /*
    * Free all locks associated with the hostname argp->name.
    */
   extern void nlm_do_free_all(nlm4_notify *argp);
   
   /*
    * Find an RPC transport that can be used to communicate with the
    * userland part of lockd.
    */
   extern CLIENT *nlm_user_lockd(void);
   
   #endif
   
   #endif

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