1 /* 2 * Copyright (c) 2014 The DragonFly Project. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 3. Neither the name of The DragonFly Project nor the names of its 13 * contributors may be used to endorse or promote products derived 14 * from this software without specific, prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 19 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 20 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 22 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 24 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifndef _NETGRAPH_NETGRAPH2_H_ 31 #define _NETGRAPH_NETGRAPH2_H_ 32 33 /* 34 * This header implements the netgraph kernel public inline functions. 35 */ 36 37 #ifndef _KERNEL 38 #error "kernel only header file" 39 #endif 40 41 #ifndef _SYS_THREAD_H_ 42 #include <sys/thread.h> 43 #endif 44 #ifndef _NETGRAPH_NETGRAPH_H_ 45 #include <netgraph7/netgraph.h> 46 #endif 47 48 extern struct lwkt_port *ng_msgport[MAXCPU]; 49 50 /* 51 * Return the message port for the netgraph message servicing 52 * thread for a particular cpu. 53 */ 54 static __inline lwkt_port_t 55 ng_cpuport(int cpu) 56 { 57 KKASSERT(cpu >= 0 && cpu < ncpus); 58 return ng_msgport[cpu]; 59 } 60 61 /* 62 * Grab a reference on the item. 63 */ 64 static __inline void 65 ng_ref_item(item_p item) 66 { 67 refcount_acquire(&item->refs); 68 } 69 70 /* 71 * Release a reference on the item. 72 * 73 * When the last reference is released, call the item's callback function if 74 * there is one and free the item. 75 */ 76 static __inline void 77 ng_unref_item(item_p item, int error) 78 { 79 if (refcount_release(&item->refs)) { 80 /* We have released the last reference */ 81 if (item->apply != NULL) { 82 KKASSERT(item->apply->apply != NULL); 83 (*item->apply->apply)(item->apply->context, error); 84 ng_free_apply(item->apply); 85 item->apply = NULL; 86 } 87 ng_free_item(item); 88 } 89 } 90 91 #endif /* _NETGRAPH_NETGRAPH2_H_ */ 92