bsd/net/flowadv.h

   1 /*
   2  * Copyright (c) 2012-2020 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 #ifndef _NET_FLOWADV_H_
  30 #define _NET_FLOWADV_H_
  31
  32 #ifdef KERNEL_PRIVATE
  33 #include <sys/types.h>
  34 #include <sys/queue.h>
  35
  36
  37 #define FADV_SUCCESS            0       /* success */
  38 #define FADV_FLOW_CONTROLLED    1       /* regular flow control */
  39 #define FADV_SUSPENDED          2       /* flow control due to suspension */
  40
  41 struct flowadv {
  42         int32_t         code;           /* FADV advisory code */
  43 };
  44
  45 #ifdef BSD_KERNEL_PRIVATE
  46 struct flowadv_fcentry {
  47         STAILQ_ENTRY(flowadv_fcentry) fce_link;
  48         u_int32_t       fce_flowsrc_type;       /* FLOWSRC values */
  49         u_int32_t       fce_flowid;
  50 };
  51
  52 STAILQ_HEAD(flowadv_fclist, flowadv_fcentry);
  53
  54 __BEGIN_DECLS
  55
  56 extern void flowadv_init(void);
  57 extern struct flowadv_fcentry *flowadv_alloc_entry(int);
  58 extern void flowadv_free_entry(struct flowadv_fcentry *);
  59 extern void flowadv_add(struct flowadv_fclist *);
  60 extern void flowadv_add_entry(struct flowadv_fcentry *);
  61 extern void flowadv_reap_caches(boolean_t);
  62
  63 __END_DECLS
  64
  65 #endif /* BSD_KERNEL_PRIVATE */
  66 #endif /* KERNEL_PRIVATE */
  67 #endif /* _NET_FLOWADV_H_ */