bsd/netinet/mp_pcb.h

   1 /*
   2  * Copyright (c) 2012-2013 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 _NETINET_MP_PCB_H_
  30 #define _NETINET_MP_PCB_H_
  31
  32 #ifdef BSD_KERNEL_PRIVATE
  33 #include <sys/types.h>
  34 #include <sys/queue.h>
  35 #include <kern/locks.h>
  36
  37 /* Keep in sync with bsd/dev/dtrace/scripts/mptcp.d */
  38 typedef enum mppcb_state {
  39         MPPCB_STATE_INUSE       = 1,
  40         MPPCB_STATE_DEAD        = 2,
  41 } mppcb_state_t;
  42
  43 /*
  44  * Multipath Protocol Control Block
  45  */
  46 struct mppcb {
  47         TAILQ_ENTRY(mppcb)      mpp_entry;      /* glue to all PCBs */
  48         decl_lck_mtx_data(, mpp_lock);          /* per PCB lock */
  49         struct mppcbinfo        *mpp_pcbinfo;   /* PCB info */
  50         void                    *mpp_pcbe;      /* ptr to per-protocol ext */
  51         struct socket           *mpp_socket;    /* back pointer to socket */
  52         uint32_t                mpp_flags;      /* PCB flags */
  53         mppcb_state_t           mpp_state;      /* PCB state */
  54 };
  55
  56 #define sotomppcb(so)   ((struct mppcb *)((so)->so_pcb))
  57
  58 /* valid values for mpp_flags */
  59 #define MPP_ATTACHED    0x1
  60 #define MPP_DEFUNCT     0x2
  61
  62 /*
  63  * Multipath PCB Information
  64  */
  65 struct mppcbinfo {
  66         TAILQ_ENTRY(mppcbinfo)  mppi_entry;     /* glue to all PCB info */
  67         TAILQ_HEAD(, mppcb)     mppi_pcbs;      /* list of PCBs */
  68         uint32_t                mppi_count;     /* # of PCBs in list */
  69         struct zone             *mppi_zone;     /* zone for this PCB */
  70         uint32_t                mppi_size;      /* size of PCB structure */
  71         lck_grp_t               *mppi_lock_grp; /* lock grp */
  72         lck_attr_t              *mppi_lock_attr; /* lock attr */
  73         lck_grp_attr_t          *mppi_lock_grp_attr; /* lock grp attr */
  74         decl_lck_mtx_data(, mppi_lock);         /* global PCB lock */
  75         uint32_t (*mppi_gc)(struct mppcbinfo *); /* garbage collector func */
  76         uint32_t (*mppi_timer)(struct mppcbinfo *); /* timer func */
  77 };
  78
  79 __BEGIN_DECLS
  80 extern void mp_pcbinit(void);
  81 extern void mp_pcbinfo_attach(struct mppcbinfo *);
  82 extern int mp_pcbinfo_detach(struct mppcbinfo *);
  83 extern int mp_pcballoc(struct socket *, struct mppcbinfo *);
  84 extern void mp_pcbdetach(struct mppcb *);
  85 extern void mp_pcbdispose(struct mppcb *);
  86 extern void mp_gc_sched(void);
  87 extern void mptcp_timer_sched(void);
  88 __END_DECLS
  89
  90 #endif /* BSD_KERNEL_PRIVATE */
  91 #endif /* !_NETINET_MP_PCB_H_ */