X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/fa4905b191e0d16b0fffd53bd565eca71d01fae0..a39ff7e25e19b3a8c3020042a3872ca9ec9659f1:/bsd/sys/mbuf.h diff --git a/bsd/sys/mbuf.h b/bsd/sys/mbuf.h index ba1bf3bcd..8dafca387 100644 --- a/bsd/sys/mbuf.h +++ b/bsd/sys/mbuf.h @@ -1,27 +1,33 @@ /* - * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. + * Copyright (c) 1999-2017 Apple Inc. All rights reserved. * - * @APPLE_LICENSE_HEADER_START@ - * - * The contents of this file constitute Original Code as defined in and - * are subject to the Apple Public Source License Version 1.1 (the - * "License"). You may not use this file except in compliance with the - * License. Please obtain a copy of the License at - * http://www.apple.com/publicsource and read it before using this file. - * - * This Original Code and all software distributed under the License are - * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER + * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ + * + * This file contains Original Code and/or Modifications of Original Code + * as defined in and that are subject to the Apple Public Source License + * Version 2.0 (the 'License'). You may not use this file except in + * compliance with the License. The rights granted to you under the License + * may not be used to create, or enable the creation or redistribution of, + * unlawful or unlicensed copies of an Apple operating system, or to + * circumvent, violate, or enable the circumvention or violation of, any + * terms of an Apple operating system software license agreement. + * + * Please obtain a copy of the License at + * http://www.opensource.apple.com/apsl/ and read it before using this file. + * + * The Original Code and all software distributed under the License are + * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the - * License for the specific language governing rights and limitations - * under the License. - * - * @APPLE_LICENSE_HEADER_END@ + * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. + * Please see the License for the specific language governing rights and + * limitations under the License. + * + * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* Copyright (c) 1998, 1999 Apple Computer, Inc. All Rights Reserved */ /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */ -/* +/* * Mach Operating System * Copyright (c) 1987 Carnegie-Mellon University * All rights reserved. The CMU software License Agreement specifies @@ -62,98 +68,486 @@ * SUCH DAMAGE. * * @(#)mbuf.h 8.3 (Berkeley) 1/21/94 - ********************************************************************** - * HISTORY - * 20-May-95 Mac Gillon (mgillon) at NeXT - * New version based on 4.4 - * Purged old history + */ +/* + * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce + * support for mandatory and extensible security protections. This notice + * is included in support of clause 2.2 (b) of the Apple Public License, + * Version 2.0. */ #ifndef _SYS_MBUF_H_ #define _SYS_MBUF_H_ -#include +#include +#include +#include /* u_int32_t */ +#include /* u_int64_t */ +#include /* u_short */ + +#ifdef XNU_KERNEL_PRIVATE +#include +#include +#include /* * Mbufs are of a single size, MSIZE (machine/param.h), which * includes overhead. An mbuf may add a single "mbuf cluster" of size - * MCLBYTES (also in machine/param.h), which has no additional overhead - * and is used instead of the internal data area; this is done when - * at least MINCLSIZE of data must be stored. + * MCLBYTES/MBIGCLBYTES/M16KCLBYTES (also in machine/param.h), which has + * no additional overhead and is used instead of the internal data area; + * this is done when at least MINCLSIZE of data must be stored. + */ + +/* + * The following _MLEN and _MHLEN macros are private to xnu. Private code + * that are outside of xnu must use the mbuf_get_{mlen,mhlen} routines since + * the sizes of the structures are dependent upon specific xnu configs. */ +#define _MLEN (MSIZE - sizeof(struct m_hdr)) /* normal data len */ +#define _MHLEN (_MLEN - sizeof(struct pkthdr)) /* data len w/pkthdr */ -#define MLEN (MSIZE - sizeof(struct m_hdr)) /* normal data len */ -#define MHLEN (MLEN - sizeof(struct pkthdr)) /* data len w/pkthdr */ +#define NMBPGSHIFT (PAGE_SHIFT - MSIZESHIFT) +#define NMBPG (1 << NMBPGSHIFT) /* # of mbufs per page */ -#define MINCLSIZE (MHLEN + MLEN) /* smallest amount to put in cluster */ -#define M_MAXCOMPRESS (MHLEN / 2) /* max amount to copy for compression */ +#define NCLPGSHIFT (PAGE_SHIFT - MCLSHIFT) +#define NCLPG (1 << NCLPGSHIFT) /* # of cl per page */ -#define NMBPCL (sizeof(union mcluster) / sizeof(struct mbuf)) +#define NBCLPGSHIFT (PAGE_SHIFT - MBIGCLSHIFT) +#define NBCLPG (1 << NBCLPGSHIFT) /* # of big cl per page */ +#define NMBPCLSHIFT (MCLSHIFT - MSIZESHIFT) +#define NMBPCL (1 << NMBPCLSHIFT) /* # of mbufs per cl */ + +#define NCLPJCLSHIFT (M16KCLSHIFT - MCLSHIFT) +#define NCLPJCL (1 << NCLPJCLSHIFT) /* # of cl per jumbo cl */ + +#define NCLPBGSHIFT (MBIGCLSHIFT - MCLSHIFT) +#define NCLPBG (1 << NCLPBGSHIFT) /* # of cl per big cl */ + +#define NMBPBGSHIFT (MBIGCLSHIFT - MSIZESHIFT) +#define NMBPBG (1 << NMBPBGSHIFT) /* # of mbufs per big cl */ /* * Macros for type conversion * mtod(m,t) - convert mbuf pointer to data pointer of correct type + * mtodo(m, o) -- Same as above but with offset 'o' into data. * dtom(x) - convert data pointer within mbuf to mbuf pointer (XXX) - * mtocl(x) - convert pointer within cluster to cluster index # - * cltom(x) - convert cluster # to ptr to beginning of cluster */ -#define mtod(m,t) ((t)((m)->m_data)) -#define dtom(x) ((struct mbuf *)((u_long)(x) & ~(MSIZE-1))) -#define mtocl(x) ((union mcluster *)(x) - (union mcluster *)mbutl) -#define cltom(x) ((union mcluster *)(mbutl + (x))) - -#define MCLREF(p) (++mclrefcnt[mtocl(p)]) -#define MCLUNREF(p) (--mclrefcnt[mtocl(p)] == 0) +#define mtod(m, t) ((t)m_mtod(m)) +#define mtodo(m, o) ((void *)(mtod(m, uint8_t *) + (o))) +#define dtom(x) m_dtom(x) /* header at beginning of each mbuf: */ struct m_hdr { - struct mbuf *mh_next; /* next buffer in chain */ - struct mbuf *mh_nextpkt; /* next chain in queue/record */ - long mh_len; /* amount of data in this mbuf */ - caddr_t mh_data; /* location of data */ - short mh_type; /* type of data in this mbuf */ - short mh_flags; /* flags; see below */ + struct mbuf *mh_next; /* next buffer in chain */ + struct mbuf *mh_nextpkt; /* next chain in queue/record */ + caddr_t mh_data; /* location of data */ + int32_t mh_len; /* amount of data in this mbuf */ + u_int16_t mh_type; /* type of data in this mbuf */ + u_int16_t mh_flags; /* flags; see below */ +#if __arm__ && (__BIGGEST_ALIGNMENT__ > 4) +/* This is needed because of how _MLEN is defined and used. Ideally, _MLEN + * should be defined using the offsetof(struct mbuf, M_dat), since there is + * no guarantee that mbuf.M_dat will start where mbuf.m_hdr ends. The compiler + * may (and does in the armv7k case) insert padding between m_hdr and M_dat in + * mbuf. We cannot easily use offsetof, however, since _MLEN is referenced + * in the definition of mbuf. + */ +} __attribute__((aligned(8))); +#else +}; +#endif + +/* + * Packet tag structure (see below for details). + */ +struct m_tag { + u_int64_t m_tag_cookie; /* Error checking */ +#ifndef __LP64__ + u_int32_t pad; /* For structure alignment */ +#endif /* !__LP64__ */ + SLIST_ENTRY(m_tag) m_tag_link; /* List of packet tags */ + u_int16_t m_tag_type; /* Module specific type */ + u_int16_t m_tag_len; /* Length of data */ + u_int32_t m_tag_id; /* Module ID */ +}; + +#define M_TAG_ALIGN(len) \ + (P2ROUNDUP(len, sizeof (u_int64_t)) + sizeof (struct m_tag)) + +#define M_TAG_VALID_PATTERN 0xfeedfacefeedfaceULL +#define M_TAG_FREE_PATTERN 0xdeadbeefdeadbeefULL + +/* + * Packet tag header structure (at the top of mbuf). Pointers are + * 32-bit in ILP32; m_tag needs 64-bit alignment, hence padded. + */ +struct m_taghdr { +#ifndef __LP64__ + u_int32_t pad; /* For structure alignment */ +#endif /* !__LP64__ */ + u_int64_t refcnt; /* Number of tags in this mbuf */ +}; + +/* + * Driver auxiliary metadata tag (KERNEL_TAG_TYPE_DRVAUX). + */ +struct m_drvaux_tag { + u_int32_t da_family; /* IFNET_FAMILY values */ + u_int32_t da_subfamily; /* IFNET_SUBFAMILY values */ + u_int32_t da_reserved; /* for future */ + u_int32_t da_length; /* length of following data */ +}; + +/* Values for pftag_flags (16-bit wide) */ +#define PF_TAG_GENERATED 0x1 /* pkt generated by PF */ +#define PF_TAG_FRAGCACHE 0x2 +#define PF_TAG_TRANSLATE_LOCALHOST 0x4 +#if PF_ECN +#define PF_TAG_HDR_INET 0x8 /* hdr points to IPv4 */ +#define PF_TAG_HDR_INET6 0x10 /* hdr points to IPv6 */ +#endif /* PF_ECN */ +/* + * PF mbuf tag + */ +struct pf_mtag { + u_int16_t pftag_flags; /* PF_TAG flags */ + u_int16_t pftag_rtableid; /* alternate routing table id */ + u_int16_t pftag_tag; + u_int16_t pftag_routed; +#if PF_ECN + void *pftag_hdr; /* saved hdr pos in mbuf, for ECN */ +#endif /* PF_ECN */ +}; + +/* + * TCP mbuf tag + */ +struct tcp_pktinfo { + union { + struct { + u_int32_t segsz; /* segment size (actual MSS) */ + u_int32_t start_seq; /* start seq of this packet */ + } __tx; + struct { + u_int16_t lro_pktlen; /* max seg size encountered */ + u_int8_t lro_npkts; /* # of coalesced TCP pkts */ + u_int8_t lro_timediff; /* time spent in LRO */ + } __rx; + } __offload; + union { + u_int32_t pri; /* send msg priority */ + u_int32_t seq; /* recv msg sequence # */ + } __msgattr; +#define tso_segsz proto_mtag.__pr_u.tcp.tm_tcp.__offload.__tx.segsz +#define tx_start_seq proto_mtag.__pr_u.tcp.tm_tcp.__offload.__tx.start_seq +#define lro_pktlen proto_mtag.__pr_u.tcp.tm_tcp.__offload.__rx.lro_pktlen +#define lro_npkts proto_mtag.__pr_u.tcp.tm_tcp.__offload.__rx.lro_npkts +#define lro_elapsed proto_mtag.__pr_u.tcp.tm_tcp.__offload.__rx.lro_timediff +#define msg_pri proto_mtag.__pr_u.tcp.tm_tcp.__msgattr.pri +#define msg_seq proto_mtag.__pr_u.tcp.tm_tcp.__msgattr.seq +}; + +/* + * MPTCP mbuf tag + */ +struct mptcp_pktinfo { + u_int64_t mtpi_dsn; /* MPTCP Data Sequence Number */ + u_int32_t mtpi_rel_seq; /* Relative Seq Number */ + u_int16_t mtpi_length; /* Length of mapping */ + u_int16_t mtpi_csum; +#define mp_dsn proto_mtag.__pr_u.tcp.tm_mptcp.mtpi_dsn +#define mp_rseq proto_mtag.__pr_u.tcp.tm_mptcp.mtpi_rel_seq +#define mp_rlen proto_mtag.__pr_u.tcp.tm_mptcp.mtpi_length +#define mp_csum proto_mtag.__pr_u.tcp.tm_mptcp.mtpi_csum +}; + +/* + * TCP specific mbuf tag. Note that the current implementation uses + * MPTCP metadata strictly between MPTCP and the TCP subflow layers, + * hence tm_tcp and tm_mptcp are mutually exclusive. This also means + * that TCP messages functionality is currently incompatible with MPTCP. + */ +struct tcp_mtag { + union { + struct tcp_pktinfo tm_tcp; /* TCP and below */ + struct mptcp_pktinfo tm_mptcp; /* MPTCP-TCP only */ + }; +}; + +struct driver_mtag_ { + uintptr_t _drv_tx_compl_arg; + uintptr_t _drv_tx_compl_data; + kern_return_t _drv_tx_status; + uint16_t _drv_flowid; +#define drv_tx_compl_arg builtin_mtag._drv_mtag._drv_tx_compl_arg +#define drv_tx_compl_data builtin_mtag._drv_mtag._drv_tx_compl_data +#define drv_tx_status builtin_mtag._drv_mtag._drv_tx_status +#define drv_flowid builtin_mtag._drv_mtag._drv_flowid +}; + +/* + * Protocol specific mbuf tag (at most one protocol metadata per mbuf). + * + * Care must be taken to ensure that they are mutually exclusive, e.g. + * IPSec policy ID implies no TCP segment offload (which is fine given + * that the former is used on the virtual ipsec interface that does + * not advertise the TSO capability.) + */ +struct proto_mtag_ { + union { + struct tcp_mtag tcp; /* TCP specific */ + } __pr_u; +}; + +/* + * NECP specific mbuf tag. + */ +struct necp_mtag_ { + u_int32_t necp_policy_id; + u_int32_t necp_last_interface_index; + u_int32_t necp_route_rule_id; + u_int32_t necp_app_id; }; -/* record/packet header in first mbuf of chain; valid if M_PKTHDR set */ -struct pkthdr { - int len; /* total packet length */ - struct ifnet *rcvif; /* rcv interface */ +union builtin_mtag { + struct { + struct proto_mtag_ _proto_mtag; /* built-in protocol-specific tag */ + struct pf_mtag _pf_mtag; /* built-in PF tag */ + struct necp_mtag_ _necp_mtag; /* built-in NECP tag */ + } _net_mtag; + struct driver_mtag_ _drv_mtag; +#define necp_mtag builtin_mtag._net_mtag._necp_mtag +#define proto_mtag builtin_mtag._net_mtag._proto_mtag +#define driver_mtag builtin_mtag._drv_mtag +}; +/* + * Record/packet header in first mbuf of chain; valid only if M_PKTHDR set. + */ +struct pkthdr { + struct ifnet *rcvif; /* rcv interface */ /* variables for ip and tcp reassembly */ - void *header; /* pointer to packet header */ - /* variables for hardware checksum */ - int csum_flags; /* flags regarding checksum */ - int csum_data; /* data field used by csum routines */ - struct mbuf *aux; /* extra data buffer; ipsec/others */ - void *reserved1; /* for future use */ - void *reserved2; /* for future use */ + void *pkt_hdr; /* pointer to packet header */ + int32_t len; /* total packet length */ + /* variables for hardware checksum */ + /* Note: csum_flags is used for hardware checksum and VLAN */ + u_int32_t csum_flags; /* flags regarding checksum */ + union { + struct { + u_int16_t val; /* checksum value */ + u_int16_t start; /* checksum start offset */ + } _csum_rx; +#define csum_rx_val _csum_rx.val +#define csum_rx_start _csum_rx.start + struct { + u_int16_t start; /* checksum start offset */ + u_int16_t stuff; /* checksum stuff offset */ + } _csum_tx; +#define csum_tx_start _csum_tx.start +#define csum_tx_stuff _csum_tx.stuff + u_int32_t csum_data; /* data field used by csum routines */ + }; + u_int16_t vlan_tag; /* VLAN tag, host byte order */ + /* + * Packet classifier info + * + * PKTF_FLOW_ID set means valid flow ID. A non-zero flow ID value + * means the packet has been classified by one of the flow sources. + * It is also a prerequisite for flow control advisory, which is + * enabled by additionally setting PKTF_FLOW_ADV. + * + * The protocol value is a best-effort representation of the payload. + * It is opportunistically updated and used only for optimization. + * It is not a substitute for parsing the protocol header(s); use it + * only as a hint. + * + * If PKTF_IFAINFO is set, pkt_ifainfo contains one or both of the + * indices of interfaces which own the source and/or destination + * addresses of the packet. For the local/loopback case (PKTF_LOOP), + * both should be valid, and thus allows for the receiving end to + * quickly determine the actual interfaces used by the the addresses; + * they may not necessarily be the same or refer to the loopback + * interface. Otherwise, in the non-local/loopback case, the indices + * are opportunistically set, and because of that only one may be set + * (0 means the index has not been determined.) In addition, the + * interface address flags are also recorded. This allows us to avoid + * storing the corresponding {in,in6}_ifaddr in an mbuf tag. Ideally + * this would be a superset of {ia,ia6}_flags, but the namespaces are + * overlapping at present, so we'll need a new set of values in future + * to achieve this. For now, we will just rely on the address family + * related code paths examining this mbuf to interpret the flags. + */ + u_int8_t pkt_proto; /* IPPROTO value */ + u_int8_t pkt_flowsrc; /* FLOWSRC values */ + u_int32_t pkt_flowid; /* flow ID */ + u_int32_t pkt_flags; /* PKTF flags (see below) */ + u_int32_t pkt_svc; /* MBUF_SVC value */ + + u_int32_t pkt_compl_context; /* Packet completion context */ + + union { + struct { + u_int16_t src; /* ifindex of src addr i/f */ + u_int16_t src_flags; /* src PKT_IFAIFF flags */ + u_int16_t dst; /* ifindex of dst addr i/f */ + u_int16_t dst_flags; /* dst PKT_IFAIFF flags */ + } _pkt_iaif; +#define src_ifindex _pkt_iaif.src +#define src_iff _pkt_iaif.src_flags +#define dst_ifindex _pkt_iaif.dst +#define dst_iff _pkt_iaif.dst_flags + u_int64_t pkt_ifainfo; /* data field used by ifainfo */ + struct { + u_int32_t if_data; /* bytes in interface queue */ + u_int32_t sndbuf_data; /* bytes in socket buffer */ + } _pkt_bsr; /* Buffer status report used by cellular interface */ +#define bufstatus_if _pkt_bsr.if_data +#define bufstatus_sndbuf _pkt_bsr.sndbuf_data + }; + u_int64_t pkt_timestamp; /* enqueue time */ + + /* + * Tags (external and built-in) + */ + SLIST_HEAD(packet_tags, m_tag) tags; /* list of external tags */ + union builtin_mtag builtin_mtag; + /* + * Module private scratch space (32-bit aligned), currently 16-bytes + * large. Anything stored here is not guaranteed to survive across + * modules. The AQM layer (outbound) uses all 16-bytes for both + * packet scheduling and flow advisory information. + */ + struct { + union { + u_int8_t __mpriv8[16]; + u_int16_t __mpriv16[8]; + struct { + union { + u_int8_t __val8[4]; + u_int16_t __val16[2]; + u_int32_t __val32; + } __mpriv32_u; + } __mpriv32[4]; + u_int64_t __mpriv64[2]; + } __mpriv_u; + } pkt_mpriv __attribute__((aligned(4))); +#define pkt_mpriv_hash pkt_mpriv.__mpriv_u.__mpriv32[0].__mpriv32_u.__val32 +#define pkt_mpriv_flags pkt_mpriv.__mpriv_u.__mpriv32[1].__mpriv32_u.__val32 +#define pkt_mpriv_srcid pkt_mpriv.__mpriv_u.__mpriv32[2].__mpriv32_u.__val32 +#define pkt_mpriv_fidx pkt_mpriv.__mpriv_u.__mpriv32[3].__mpriv32_u.__val32 + + u_int32_t redzone; /* red zone */ + u_int32_t pkt_compl_callbacks; /* Packet completion callbacks */ }; +/* + * Flow data source type. A data source module is responsible for generating + * a unique flow ID and associating it to each data flow as pkt_flowid. + * This is required for flow control/advisory, as it allows the output queue + * to identify the data source object and inform that it can resume its + * transmission (in the event it was flow controlled.) + */ +#define FLOWSRC_INPCB 1 /* flow ID generated by INPCB */ +#define FLOWSRC_IFNET 2 /* flow ID generated by interface */ +#define FLOWSRC_PF 3 /* flow ID generated by PF */ +#define FLOWSRC_CHANNEL 4 /* flow ID generated by channel */ + +/* + * Packet flags. Unlike m_flags, all packet flags are copied along when + * copying m_pkthdr, i.e. no equivalent of M_COPYFLAGS here. These flags + * (and other classifier info) will be cleared during DLIL input. + * + * Some notes about M_LOOP and PKTF_LOOP: + * + * - M_LOOP flag is overloaded, and its use is discouraged. Historically, + * that flag was used by the KAME implementation for allowing certain + * certain exceptions to be made in the IP6_EXTHDR_CHECK() logic; this + * was originally meant to be set as the packet is looped back to the + * system, and in some circumstances temporarily set in ip6_output(). + * Over time, this flag was used by the pre-output routines to indicate + * to the DLIL frameout and output routines, that the packet may be + * looped back to the system under the right conditions. In addition, + * this is an mbuf flag rather than an mbuf packet header flag. + * + * - PKTF_LOOP is an mbuf packet header flag, which is set if and only + * if the packet was looped back to the system. This flag should be + * used instead for newer code. + */ +#define PKTF_FLOW_ID 0x1 /* pkt has valid flowid value */ +#define PKTF_FLOW_ADV 0x2 /* pkt triggers local flow advisory */ +#define PKTF_FLOW_LOCALSRC 0x4 /* pkt is locally originated */ +#define PKTF_FLOW_RAWSOCK 0x8 /* pkt locally generated by raw sock */ +#define PKTF_PRIO_PRIVILEGED 0x10 /* packet priority is privileged */ +#define PKTF_PROXY_DST 0x20 /* processed but not locally destined */ +#define PKTF_INET_RESOLVE 0x40 /* IPv4 resolver packet */ +#define PKTF_INET6_RESOLVE 0x80 /* IPv6 resolver packet */ +#define PKTF_RESOLVE_RTR 0x100 /* pkt is for resolving router */ +#define PKTF_SW_LRO_PKT 0x200 /* pkt is a large coalesced pkt */ +#define PKTF_SW_LRO_DID_CSUM 0x400 /* IP and TCP checksums done by LRO */ +#define PKTF_MPTCP 0x800 /* TCP with MPTCP metadata */ +#define PKTF_MPSO 0x1000 /* MPTCP socket meta data */ +#define PKTF_LOOP 0x2000 /* loopbacked packet */ +#define PKTF_IFAINFO 0x4000 /* pkt has valid interface addr info */ +#define PKTF_SO_BACKGROUND 0x8000 /* data is from background source */ +#define PKTF_FORWARDED 0x10000 /* pkt was forwarded from another i/f */ +#define PKTF_PRIV_GUARDED 0x20000 /* pkt_mpriv area guard enabled */ +#define PKTF_KEEPALIVE 0x40000 /* pkt is kernel-generated keepalive */ +#define PKTF_SO_REALTIME 0x80000 /* data is realtime traffic */ +#define PKTF_VALID_UNSENT_DATA 0x100000 /* unsent data is valid */ +#define PKTF_TCP_REXMT 0x200000 /* packet is TCP retransmission */ +#define PKTF_REASSEMBLED 0x400000 /* Packet was reassembled */ +#define PKTF_TX_COMPL_TS_REQ 0x800000 /* tx completion timestamp requested */ +#define PKTF_TS_VALID 0x1000000 /* pkt timestamp is valid */ +#define PKTF_DRIVER_MTAG 0x2000000 /* driver mbuf tags fields inited */ +#define PKTF_NEW_FLOW 0x4000000 /* Data from a new flow */ +#define PKTF_START_SEQ 0x8000000 /* valid start sequence */ +#define PKTF_LAST_PKT 0x10000000 /* last packet in the flow */ +#define PKTF_MPTCP_REINJ 0x20000000 /* Packet has been reinjected for MPTCP */ +#define PKTF_MPTCP_DFIN 0x40000000 /* Packet is a data-fin */ +#define PKTF_HBH_CHKED 0x80000000 /* HBH option is checked */ + +/* flags related to flow control/advisory and identification */ +#define PKTF_FLOW_MASK \ + (PKTF_FLOW_ID | PKTF_FLOW_ADV | PKTF_FLOW_LOCALSRC | PKTF_FLOW_RAWSOCK) -/* description of external storage mapped into mbuf, valid if M_EXT set */ +/* + * Description of external storage mapped into mbuf, valid only if M_EXT set. + */ +typedef void (*m_ext_free_func_t)(caddr_t, u_int, caddr_t); struct m_ext { caddr_t ext_buf; /* start of buffer */ - void (*ext_free)(); /* free routine if not the usual */ + m_ext_free_func_t ext_free; /* free routine if not the usual */ u_int ext_size; /* size of buffer, for ext_free */ caddr_t ext_arg; /* additional ext_free argument */ - struct ext_refsq { /* references held */ - struct ext_refsq *forward, *backward; - } ext_refs; + struct ext_ref { + struct mbuf *paired; + u_int16_t minref; + u_int16_t refcnt; + u_int16_t prefcnt; + u_int16_t flags; + u_int32_t priv; + uintptr_t ext_token; + } *ext_refflags; }; +/* define m_ext to a type since it gets redefined below */ +typedef struct m_ext _m_ext_t; + +/* + * The mbuf object + */ struct mbuf { - struct m_hdr m_hdr; + struct m_hdr m_hdr; union { struct { - struct pkthdr MH_pkthdr; /* M_PKTHDR set */ + struct pkthdr MH_pkthdr; /* M_PKTHDR set */ union { - struct m_ext MH_ext; /* M_EXT set */ - char MH_databuf[MHLEN]; + struct m_ext MH_ext; /* M_EXT set */ + char MH_databuf[_MHLEN]; } MH_dat; } MH; - char M_databuf[MLEN]; /* !M_PKTHDR, !M_EXT */ + char M_databuf[_MLEN]; /* !M_PKTHDR, !M_EXT */ } M_dat; }; @@ -168,46 +562,99 @@ struct mbuf { #define m_ext M_dat.MH.MH_dat.MH_ext #define m_pktdat M_dat.MH.MH_dat.MH_databuf #define m_dat M_dat.M_databuf +#define m_pktlen(_m) ((_m)->m_pkthdr.len) +#define m_pftag(_m) (&(_m)->m_pkthdr.builtin_mtag._net_mtag._pf_mtag) -/* mbuf flags */ +/* mbuf flags (private) */ #define M_EXT 0x0001 /* has associated external storage */ #define M_PKTHDR 0x0002 /* start of record */ #define M_EOR 0x0004 /* end of record */ #define M_PROTO1 0x0008 /* protocol-specific */ +#define M_PROTO2 0x0010 /* protocol-specific */ +#define M_PROTO3 0x0020 /* protocol-specific */ +#define M_LOOP 0x0040 /* packet is looped back (also see PKTF_LOOP) */ +#define M_PROTO5 0x0080 /* protocol-specific */ -#define M_MIP6TUNNEL 0x0010 /* MIP6 temporary use */ - -/* mbuf pkthdr flags, also in m_flags */ +/* mbuf pkthdr flags, also in m_flags (private) */ #define M_BCAST 0x0100 /* send/received as link-level broadcast */ #define M_MCAST 0x0200 /* send/received as link-level multicast */ -#define M_FRAG 0x0400 /* packet is a fragment of a larger packet */ -#define M_ANYCAST6 0x0800 /* received as IPv6 anycast */ +#define M_FRAG 0x0400 /* packet is a fragment of a larger packet */ +#define M_FIRSTFRAG 0x0800 /* packet is first fragment */ +#define M_LASTFRAG 0x1000 /* packet is last fragment */ +#define M_PROMISC 0x2000 /* packet is promiscuous (shouldn't go to stack) */ +#define M_HASFCS 0x4000 /* packet has FCS */ +#define M_TAGHDR 0x8000 /* m_tag hdr structure at top of mbuf data */ -/* mbuf pkthdr flags, also in m_flags */ -#define M_AUTHIPHDR 0x1000 /* data origin authentication for IP header */ -#define M_DECRYPTED 0x2000 /* confidentiality */ -#define M_LOOP 0x4000 /* for Mbuf statistics */ -#define M_AUTHIPDGM 0x8000 /* data origin authentication */ +/* + * Flags to purge when crossing layers. + */ +#define M_PROTOFLAGS \ + (M_PROTO1|M_PROTO2|M_PROTO3|M_PROTO5) /* flags copied when copying m_pkthdr */ -#define M_COPYFLAGS (M_PKTHDR|M_EOR|M_BCAST|M_MCAST|M_FRAG|M_ANYCAST6|M_AUTHIPHDR|M_DECRYPTED|M_LOOP|M_AUTHIPDGM) - -/* flags indicating hw checksum support and sw checksum requirements [freebsd4.1]*/ -#define CSUM_IP 0x0001 /* will csum IP */ -#define CSUM_TCP 0x0002 /* will csum TCP */ -#define CSUM_UDP 0x0004 /* will csum UDP */ -#define CSUM_IP_FRAGS 0x0008 /* will csum IP fragments */ -#define CSUM_FRAGMENT 0x0010 /* will do IP fragmentation */ - -#define CSUM_IP_CHECKED 0x0100 /* did csum IP */ -#define CSUM_IP_VALID 0x0200 /* ... the csum is valid */ -#define CSUM_DATA_VALID 0x0400 /* csum_data field is valid */ -#define CSUM_PSEUDO_HDR 0x0800 /* csum_data has pseudo hdr */ -#define CSUM_TCP_SUM16 0x1000 /* simple TCP Sum16 computation */ - -#define CSUM_DELAY_DATA (CSUM_TCP | CSUM_UDP) -#define CSUM_DELAY_IP (CSUM_IP) /* XXX add ipv6 here too? */ +#define M_COPYFLAGS \ + (M_PKTHDR|M_EOR|M_PROTO1|M_PROTO2|M_PROTO3 | \ + M_LOOP|M_PROTO5|M_BCAST|M_MCAST|M_FRAG | \ + M_FIRSTFRAG|M_LASTFRAG|M_PROMISC|M_HASFCS) + +/* flags indicating hw checksum support and sw checksum requirements */ +#define CSUM_IP 0x0001 /* will csum IP */ +#define CSUM_TCP 0x0002 /* will csum TCP */ +#define CSUM_UDP 0x0004 /* will csum UDP */ +#define CSUM_IP_FRAGS 0x0008 /* will csum IP fragments */ +#define CSUM_FRAGMENT 0x0010 /* will do IP fragmentation */ +#define CSUM_TCPIPV6 0x0020 /* will csum TCP for IPv6 */ +#define CSUM_UDPIPV6 0x0040 /* will csum UDP for IPv6 */ +#define CSUM_FRAGMENT_IPV6 0x0080 /* will do IPv6 fragmentation */ + +#define CSUM_IP_CHECKED 0x0100 /* did csum IP */ +#define CSUM_IP_VALID 0x0200 /* ... the csum is valid */ +#define CSUM_DATA_VALID 0x0400 /* csum_data field is valid */ +#define CSUM_PSEUDO_HDR 0x0800 /* csum_data has pseudo hdr */ +#define CSUM_PARTIAL 0x1000 /* simple Sum16 computation */ +#define CSUM_ZERO_INVERT 0x2000 /* invert 0 to -0 (0xffff) */ + +#define CSUM_DELAY_DATA (CSUM_TCP | CSUM_UDP) +#define CSUM_DELAY_IP (CSUM_IP) /* IPv4 only: no IPv6 IP cksum */ +#define CSUM_DELAY_IPV6_DATA (CSUM_TCPIPV6 | CSUM_UDPIPV6) +#define CSUM_DATA_IPV6_VALID CSUM_DATA_VALID /* csum_data field is valid */ + +#define CSUM_TX_FLAGS \ + (CSUM_DELAY_IP | CSUM_DELAY_DATA | CSUM_DELAY_IPV6_DATA | \ + CSUM_DATA_VALID | CSUM_PARTIAL | CSUM_ZERO_INVERT) +#define CSUM_RX_FLAGS \ + (CSUM_IP_CHECKED | CSUM_IP_VALID | CSUM_PSEUDO_HDR | \ + CSUM_DATA_VALID | CSUM_PARTIAL) + +/* + * Note: see also IF_HWASSIST_CSUM defined in + */ + +/* VLAN tag present */ +#define CSUM_VLAN_TAG_VALID 0x10000 /* vlan_tag field is valid */ + +/* TCP Segment Offloading requested on this mbuf */ +#define CSUM_TSO_IPV4 0x100000 /* This mbuf needs to be segmented by the NIC */ +#define CSUM_TSO_IPV6 0x200000 /* This mbuf needs to be segmented by the NIC */ + +#define TSO_IPV4_OK(_ifp, _m) \ + (((_ifp)->if_hwassist & IFNET_TSO_IPV4) && \ + ((_m)->m_pkthdr.csum_flags & CSUM_TSO_IPV4)) \ + +#define TSO_IPV4_NOTOK(_ifp, _m) \ + (!((_ifp)->if_hwassist & IFNET_TSO_IPV4) && \ + ((_m)->m_pkthdr.csum_flags & CSUM_TSO_IPV4)) \ + +#define TSO_IPV6_OK(_ifp, _m) \ + (((_ifp)->if_hwassist & IFNET_TSO_IPV6) && \ + ((_m)->m_pkthdr.csum_flags & CSUM_TSO_IPV6)) \ + +#define TSO_IPV6_NOTOK(_ifp, _m) \ + (!((_ifp)->if_hwassist & IFNET_TSO_IPV6) && \ + ((_m)->m_pkthdr.csum_flags & CSUM_TSO_IPV6)) \ + +#endif /* XNU_KERNEL_PRIVATE */ /* mbuf types */ #define MT_FREE 0 /* should be on free list */ @@ -223,33 +670,12 @@ struct mbuf { #define MT_FTABLE 11 /* fragment reassembly header */ #define MT_RIGHTS 12 /* access rights */ #define MT_IFADDR 13 /* interface address */ -#define MT_CONTROL 14 /* extra-data protocol message */ -#define MT_OOBDATA 15 /* expedited data */ -#define MT_MAX 32 /* enough? */ - -/* flags to m_get/MGET */ -/* Need to include malloc.h to get right options for malloc */ -#include - -#define M_DONTWAIT M_NOWAIT -#define M_WAIT M_WAITOK - -/* - * mbuf utility macros: - * - * MBUFLOCK(code) - * prevents a section of code from from being interrupted by network - * drivers. - */ - - -extern -decl_simple_lock_data(, mbuf_slock); -#define MBUF_LOCK() usimple_lock(&mbuf_slock); -#define MBUF_UNLOCK() usimple_unlock(&mbuf_slock); -#define MBUF_LOCKINIT() simple_lock_init(&mbuf_slock); - +#define MT_CONTROL 14 /* extra-data protocol message */ +#define MT_OOBDATA 15 /* expedited data */ +#define MT_TAG 16 /* volatile metadata associated to pkts */ +#define MT_MAX 32 /* enough? */ +#ifdef XNU_KERNEL_PRIVATE /* * mbuf allocation/deallocation macros: * @@ -262,56 +688,14 @@ decl_simple_lock_data(, mbuf_slock); */ #if 1 -#define MCHECK(m) if ((m)->m_type != MT_FREE) panic("mget MCHECK: m_type=%x m=%x", m->m_type, m) +#define MCHECK(m) m_mcheck(m) #else -#define MCHECK(m) +#define MCHECK(m) #endif -extern struct mbuf *mfree; /* mbuf free list */ -extern simple_lock_data_t mbuf_slock; - -#define _MINTGET(m, type) { \ - MBUF_LOCK(); \ - if (((m) = mfree) != 0) { \ - MCHECK(m); \ - ++mclrefcnt[mtocl(m)]; \ - mbstat.m_mtypes[MT_FREE]--; \ - mbstat.m_mtypes[type]++; \ - mfree = (m)->m_next; \ - } \ - MBUF_UNLOCK(); \ -} - -#define MGET(m, how, type) { \ - _MINTGET(m, type); \ - if (m) { \ - (m)->m_next = (m)->m_nextpkt = 0; \ - (m)->m_len = 0; \ - (m)->m_type = (type); \ - (m)->m_data = (m)->m_dat; \ - (m)->m_flags = 0; \ - } else \ - (m) = m_retry((how), (type)); \ -} +#define MGET(m, how, type) ((m) = m_get((how), (type))) -#define MGETHDR(m, how, type) { \ - _MINTGET(m, type); \ - if (m) { \ - (m)->m_next = (m)->m_nextpkt = 0; \ - (m)->m_type = (type); \ - (m)->m_data = (m)->m_pktdat; \ - (m)->m_flags = M_PKTHDR; \ - (m)->m_pkthdr.len = 0; \ - (m)->m_pkthdr.rcvif = NULL; \ - (m)->m_pkthdr.header = NULL; \ - (m)->m_pkthdr.csum_flags = 0; \ - (m)->m_pkthdr.csum_data = 0; \ - (m)->m_pkthdr.aux = (struct mbuf *)NULL; \ - (m)->m_pkthdr.reserved1 = NULL; \ - (m)->m_pkthdr.reserved2 = NULL; \ - } else \ - (m) = m_retryhdr((how), (type)); \ -} +#define MGETHDR(m, how, type) ((m) = m_gethdr((how), (type))) /* * Mbuf cluster macros. @@ -330,40 +714,29 @@ union mcluster { char mcl_buf[MCLBYTES]; }; -#define MCLALLOC(p, how) { \ - (void)m_clalloc(1, (how)); \ - if (((p) = (caddr_t)mclfree)) { \ - ++mclrefcnt[mtocl(p)]; \ - mbstat.m_clfree--; \ - mclfree = ((union mcluster *)(p))->mcl_next; \ - } \ - MBUF_UNLOCK(); \ -} +#define MCLALLOC(p, how) ((p) = m_mclalloc(how)) -#define MCLGET(m, how) { \ - MCLALLOC((m)->m_ext.ext_buf, (how)); \ - if ((m)->m_ext.ext_buf) { \ - (m)->m_data = (m)->m_ext.ext_buf; \ - (m)->m_flags |= M_EXT; \ - (m)->m_ext.ext_size = MCLBYTES; \ - (m)->m_ext.ext_free = 0; \ - (m)->m_ext.ext_refs.forward = (m)->m_ext.ext_refs.backward = \ - &(m)->m_ext.ext_refs; \ - } \ -} +#define MCLFREE(p) m_mclfree(p) -#define MCLFREE(p) { \ - MBUF_LOCK(); \ - if (--mclrefcnt[mtocl(p)] == 0) { \ - ((union mcluster *)(p))->mcl_next = mclfree; \ - mclfree = (union mcluster *)(p); \ - mbstat.m_clfree++; \ - } \ - MBUF_UNLOCK(); \ -} +#define MCLGET(m, how) ((m) = m_mclget(m, how)) + +/* + * Mbuf big cluster + */ +union mbigcluster { + union mbigcluster *mbc_next; + char mbc_buf[MBIGCLBYTES]; +}; -#define MCLHASREFERENCE(m) \ - ((m)->m_ext.ext_refs.forward != &((m)->m_ext.ext_refs)) +/* + * Mbuf jumbo cluster + */ +union m16kcluster { + union m16kcluster *m16kcl_next; + char m16kcl_buf[M16KCLBYTES]; +}; + +#define MCLHASREFERENCE(m) m_mclhasreference(m) /* * MFREE(struct mbuf *m, struct mbuf *n) @@ -371,39 +744,42 @@ union mcluster { * Place the successor, if any, in n. */ -#define MFREE(m, n) (n) = m_free(m) +#define MFREE(m, n) ((n) = m_free(m)) /* * Copy mbuf pkthdr from from to to. * from must have M_PKTHDR set, and to must be empty. * aux pointer will be moved to `to'. */ -#define M_COPY_PKTHDR(to, from) { \ - (to)->m_pkthdr = (from)->m_pkthdr; \ - (from)->m_pkthdr.aux = (struct mbuf *)NULL; \ - (to)->m_flags = (from)->m_flags & M_COPYFLAGS; \ - (to)->m_data = (to)->m_pktdat; \ -} +#define M_COPY_PKTHDR(to, from) m_copy_pkthdr(to, from) + +#define M_COPY_PFTAG(to, from) m_copy_pftag(to, from) + +#define M_COPY_CLASSIFIER(to, from) m_copy_classifier(to, from) /* * Set the m_data pointer of a newly-allocated mbuf (m_get/MGET) to place * an object of the specified size at the end of the mbuf, longword aligned. */ -#define M_ALIGN(m, len) \ - { (m)->m_data += (MLEN - (len)) &~ (sizeof(long) - 1); } +#define M_ALIGN(m, len) \ +do { \ + (m)->m_data += (MLEN - (len)) &~ (sizeof (long) - 1); \ +} while (0) + /* * As above, for mbufs allocated with m_gethdr/MGETHDR * or initialized by M_COPY_PKTHDR. */ -#define MH_ALIGN(m, len) \ - { (m)->m_data += (MHLEN - (len)) &~ (sizeof(long) - 1); } +#define MH_ALIGN(m, len) \ +do { \ + (m)->m_data += (MHLEN - (len)) &~ (sizeof (long) - 1); \ +} while (0) /* * Compute the amount of space available * before the current start of data in an mbuf. * Subroutine - data not available if certain references. */ -int m_leadingspace(struct mbuf *); #define M_LEADINGSPACE(m) m_leadingspace(m) /* @@ -411,7 +787,6 @@ int m_leadingspace(struct mbuf *); * after the end of data in an mbuf. * Subroutine - data not available if certain references. */ -int m_trailingspace(struct mbuf *); #define M_TRAILINGSPACE(m) m_trailingspace(m) /* @@ -420,91 +795,699 @@ int m_trailingspace(struct mbuf *); * If how is M_DONTWAIT and allocation fails, the original mbuf chain * is freed and m is set to NULL. */ -#define M_PREPEND(m, plen, how) { \ - if (M_LEADINGSPACE(m) >= (plen)) { \ - (m)->m_data -= (plen); \ - (m)->m_len += (plen); \ - } else \ - (m) = m_prepend((m), (plen), (how)); \ - if ((m) && (m)->m_flags & M_PKTHDR) \ - (m)->m_pkthdr.len += (plen); \ -} +#define M_PREPEND(m, plen, how, align) \ + ((m) = m_prepend_2((m), (plen), (how), (align))) /* change mbuf to new type */ -#define MCHTYPE(m, t) { \ - MBUF_LOCK(); \ - mbstat.m_mtypes[(m)->m_type]--; \ - mbstat.m_mtypes[t]++; \ - (m)->m_type = t; \ - MBUF_UNLOCK(); \ +#define MCHTYPE(m, t) m_mchtype(m, t) + +/* compatiblity with 4.3 */ +#define m_copy(m, o, l) m_copym((m), (o), (l), M_DONTWAIT) + +#define MBSHIFT 20 /* 1MB */ +#define MBSIZE (1 << MBSHIFT) +#define GBSHIFT 30 /* 1GB */ +#define GBSIZE (1 << GBSHIFT) + +/* + * M_STRUCT_GET ensures that intermediate protocol header (from "off" to + * "off+len") is located in single mbuf, on contiguous memory region. + * The pointer to the region will be returned to pointer variable "val", + * with type "typ". + * + * M_STRUCT_GET0 does the same, except that it aligns the structure at + * very top of mbuf. GET0 is likely to make memory copy than GET. + */ +#define M_STRUCT_GET(val, typ, m, off, len) \ +do { \ + struct mbuf *t; \ + int tmp; \ + \ + if ((m)->m_len >= (off) + (len)) { \ + (val) = (typ)(mtod((m), caddr_t) + (off)); \ + } else { \ + t = m_pulldown((m), (off), (len), &tmp); \ + if (t != NULL) { \ + if (t->m_len < tmp + (len)) \ + panic("m_pulldown malfunction"); \ + (val) = (typ)(mtod(t, caddr_t) + tmp); \ + } else { \ + (val) = (typ)NULL; \ + (m) = NULL; \ + } \ + } \ +} while (0) + +#define M_STRUCT_GET0(val, typ, m, off, len) \ +do { \ + struct mbuf *t; \ + \ + if ((off) == 0 && ((m)->m_len >= (len))) { \ + (val) = (typ)(void *)mtod(m, caddr_t); \ + } else { \ + t = m_pulldown((m), (off), (len), NULL); \ + if (t != NULL) { \ + if (t->m_len < (len)) \ + panic("m_pulldown malfunction"); \ + (val) = (typ)(void *)mtod(t, caddr_t); \ + } else { \ + (val) = (typ)NULL; \ + (m) = NULL; \ + } \ + } \ +} while (0) + +#define MBUF_INPUT_CHECK(m, rcvif) \ +do { \ + if (!(m->m_flags & MBUF_PKTHDR) || \ + m->m_len < 0 || \ + m->m_len > ((njcl > 0) ? njclbytes : MBIGCLBYTES) || \ + m->m_type == MT_FREE || \ + ((m->m_flags & M_EXT) != 0 && m->m_ext.ext_buf == NULL)) { \ + panic_plain("Failed mbuf validity check: mbuf %p len %d " \ + "type %d flags 0x%x data %p rcvif %s ifflags 0x%x", \ + m, m->m_len, m->m_type, m->m_flags, \ + ((m->m_flags & M_EXT) ? m->m_ext.ext_buf : m->m_data), \ + if_name(rcvif), \ + (rcvif->if_flags & 0xffff)); \ + } \ +} while (0) + +/* + * Simple mbuf queueing system + * + * This is basically a SIMPLEQ adapted to mbuf use (i.e. using + * m_nextpkt instead of field.sqe_next). + * + * m_next is ignored, so queueing chains of mbufs is possible + */ +#define MBUFQ_HEAD(name) \ +struct name { \ + struct mbuf *mq_first; /* first packet */ \ + struct mbuf **mq_last; /* addr of last next packet */ \ } -/* length to m_copy to copy all */ -#define M_COPYALL 1000000000 +#define MBUFQ_INIT(q) do { \ + MBUFQ_FIRST(q) = NULL; \ + (q)->mq_last = &MBUFQ_FIRST(q); \ +} while (0) -/* compatiblity with 4.3 */ -#define m_copy(m, o, l) m_copym((m), (o), (l), M_DONTWAIT) +#define MBUFQ_PREPEND(q, m) do { \ + if ((MBUFQ_NEXT(m) = MBUFQ_FIRST(q)) == NULL) \ + (q)->mq_last = &MBUFQ_NEXT(m); \ + MBUFQ_FIRST(q) = (m); \ +} while (0) + +#define MBUFQ_ENQUEUE(q, m) do { \ + MBUFQ_NEXT(m) = NULL; \ + *(q)->mq_last = (m); \ + (q)->mq_last = &MBUFQ_NEXT(m); \ +} while (0) + +#define MBUFQ_ENQUEUE_MULTI(q, m, n) do { \ + MBUFQ_NEXT(n) = NULL; \ + *(q)->mq_last = (m); \ + (q)->mq_last = &MBUFQ_NEXT(n); \ +} while (0) + +#define MBUFQ_DEQUEUE(q, m) do { \ + if (((m) = MBUFQ_FIRST(q)) != NULL) { \ + if ((MBUFQ_FIRST(q) = MBUFQ_NEXT(m)) == NULL) \ + (q)->mq_last = &MBUFQ_FIRST(q); \ + else \ + MBUFQ_NEXT(m) = NULL; \ + } \ +} while (0) +#define MBUFQ_REMOVE(q, m) do { \ + if (MBUFQ_FIRST(q) == (m)) { \ + MBUFQ_DEQUEUE(q, m); \ + } else { \ + struct mbuf *_m = MBUFQ_FIRST(q); \ + while (MBUFQ_NEXT(_m) != (m)) \ + _m = MBUFQ_NEXT(_m); \ + if ((MBUFQ_NEXT(_m) = \ + MBUFQ_NEXT(MBUFQ_NEXT(_m))) == NULL) \ + (q)->mq_last = &MBUFQ_NEXT(_m); \ + } \ +} while (0) + +#define MBUFQ_DRAIN(q) do { \ + struct mbuf *__m0; \ + while ((__m0 = MBUFQ_FIRST(q)) != NULL) { \ + MBUFQ_FIRST(q) = MBUFQ_NEXT(__m0); \ + MBUFQ_NEXT(__m0) = NULL; \ + m_freem(__m0); \ + } \ + (q)->mq_last = &MBUFQ_FIRST(q); \ +} while (0) + +#define MBUFQ_FOREACH(m, q) \ + for ((m) = MBUFQ_FIRST(q); \ + (m); \ + (m) = MBUFQ_NEXT(m)) + +#define MBUFQ_FOREACH_SAFE(m, q, tvar) \ + for ((m) = MBUFQ_FIRST(q); \ + (m) && ((tvar) = MBUFQ_NEXT(m), 1); \ + (m) = (tvar)) + +#define MBUFQ_EMPTY(q) ((q)->mq_first == NULL) +#define MBUFQ_FIRST(q) ((q)->mq_first) +#define MBUFQ_NEXT(m) ((m)->m_nextpkt) /* - * Mbuf statistics. + * mq_last is initialized to point to mq_first, so check if they're + * equal and return NULL when the list is empty. Otherwise, we need + * to subtract the offset of MBUQ_NEXT (i.e. m_nextpkt field) to get + * to the base mbuf address to return to caller. + */ +#define MBUFQ_LAST(head) \ + (((head)->mq_last == &MBUFQ_FIRST(head)) ? NULL : \ + ((struct mbuf *)(void *)((char *)(head)->mq_last - \ + (size_t)(&MBUFQ_NEXT((struct mbuf *)0))))) + +#define max_linkhdr P2ROUNDUP(_max_linkhdr, sizeof (u_int32_t)) +#define max_protohdr P2ROUNDUP(_max_protohdr, sizeof (u_int32_t)) +#endif /* XNU_KERNEL_PRIVATE */ + +/* + * Mbuf statistics (legacy). */ struct mbstat { - u_long m_mbufs; /* mbufs obtained from page pool */ - u_long m_clusters; /* clusters obtained from page pool */ - u_long m_spare; /* spare field */ - u_long m_clfree; /* free clusters */ - u_long m_drops; /* times failed to find space */ - u_long m_wait; /* times waited for space */ - u_long m_drain; /* times drained protocols for space */ - u_short m_mtypes[256]; /* type specific mbuf allocations */ - u_long m_mcfail; /* times m_copym failed */ - u_long m_mpfail; /* times m_pullup failed */ - u_long m_msize; /* length of an mbuf */ - u_long m_mclbytes; /* length of an mbuf cluster */ - u_long m_minclsize; /* min length of data to allocate a cluster */ - u_long m_mlen; /* length of data in an mbuf */ - u_long m_mhlen; /* length of data in a header mbuf */ + u_int32_t m_mbufs; /* mbufs obtained from page pool */ + u_int32_t m_clusters; /* clusters obtained from page pool */ + u_int32_t m_spare; /* spare field */ + u_int32_t m_clfree; /* free clusters */ + u_int32_t m_drops; /* times failed to find space */ + u_int32_t m_wait; /* times waited for space */ + u_int32_t m_drain; /* times drained protocols for space */ + u_short m_mtypes[256]; /* type specific mbuf allocations */ + u_int32_t m_mcfail; /* times m_copym failed */ + u_int32_t m_mpfail; /* times m_pullup failed */ + u_int32_t m_msize; /* length of an mbuf */ + u_int32_t m_mclbytes; /* length of an mbuf cluster */ + u_int32_t m_minclsize; /* min length of data to allocate a cluster */ + u_int32_t m_mlen; /* length of data in an mbuf */ + u_int32_t m_mhlen; /* length of data in a header mbuf */ + u_int32_t m_bigclusters; /* clusters obtained from page pool */ + u_int32_t m_bigclfree; /* free clusters */ + u_int32_t m_bigmclbytes; /* length of an mbuf cluster */ +}; + +/* Compatibillity with 10.3 */ +struct ombstat { + u_int32_t m_mbufs; /* mbufs obtained from page pool */ + u_int32_t m_clusters; /* clusters obtained from page pool */ + u_int32_t m_spare; /* spare field */ + u_int32_t m_clfree; /* free clusters */ + u_int32_t m_drops; /* times failed to find space */ + u_int32_t m_wait; /* times waited for space */ + u_int32_t m_drain; /* times drained protocols for space */ + u_short m_mtypes[256]; /* type specific mbuf allocations */ + u_int32_t m_mcfail; /* times m_copym failed */ + u_int32_t m_mpfail; /* times m_pullup failed */ + u_int32_t m_msize; /* length of an mbuf */ + u_int32_t m_mclbytes; /* length of an mbuf cluster */ + u_int32_t m_minclsize; /* min length of data to allocate a cluster */ + u_int32_t m_mlen; /* length of data in an mbuf */ + u_int32_t m_mhlen; /* length of data in a header mbuf */ }; /* - * pkthdr.aux type tags. + * mbuf class statistics. */ -struct mauxtag { - int af; - int type; +#define MAX_MBUF_CNAME 15 + +#if defined(XNU_KERNEL_PRIVATE) +/* For backwards compatibility with 32-bit userland process */ +struct omb_class_stat { + char mbcl_cname[MAX_MBUF_CNAME + 1]; /* class name */ + u_int32_t mbcl_size; /* buffer size */ + u_int32_t mbcl_total; /* # of buffers created */ + u_int32_t mbcl_active; /* # of active buffers */ + u_int32_t mbcl_infree; /* # of available buffers */ + u_int32_t mbcl_slab_cnt; /* # of available slabs */ + u_int64_t mbcl_alloc_cnt; /* # of times alloc is called */ + u_int64_t mbcl_free_cnt; /* # of times free is called */ + u_int64_t mbcl_notified; /* # of notified wakeups */ + u_int64_t mbcl_purge_cnt; /* # of purges so far */ + u_int64_t mbcl_fail_cnt; /* # of allocation failures */ + u_int32_t mbcl_ctotal; /* total only for this class */ + u_int32_t mbcl_release_cnt; /* amount of memory returned */ + /* + * Cache layer statistics + */ + u_int32_t mbcl_mc_state; /* cache state (see below) */ + u_int32_t mbcl_mc_cached; /* # of cached buffers */ + u_int32_t mbcl_mc_waiter_cnt; /* # waiters on the cache */ + u_int32_t mbcl_mc_wretry_cnt; /* # of wait retries */ + u_int32_t mbcl_mc_nwretry_cnt; /* # of no-wait retry attempts */ + u_int64_t mbcl_reserved[4]; /* for future use */ +} __attribute__((__packed__)); +#endif /* XNU_KERNEL_PRIVATE */ + +typedef struct mb_class_stat { + char mbcl_cname[MAX_MBUF_CNAME + 1]; /* class name */ + u_int32_t mbcl_size; /* buffer size */ + u_int32_t mbcl_total; /* # of buffers created */ + u_int32_t mbcl_active; /* # of active buffers */ + u_int32_t mbcl_infree; /* # of available buffers */ + u_int32_t mbcl_slab_cnt; /* # of available slabs */ +#if defined(KERNEL) || defined(__LP64__) + u_int32_t mbcl_pad; /* padding */ +#endif /* KERNEL || __LP64__ */ + u_int64_t mbcl_alloc_cnt; /* # of times alloc is called */ + u_int64_t mbcl_free_cnt; /* # of times free is called */ + u_int64_t mbcl_notified; /* # of notified wakeups */ + u_int64_t mbcl_purge_cnt; /* # of purges so far */ + u_int64_t mbcl_fail_cnt; /* # of allocation failures */ + u_int32_t mbcl_ctotal; /* total only for this class */ + u_int32_t mbcl_release_cnt; /* amount of memory returned */ + /* + * Cache layer statistics + */ + u_int32_t mbcl_mc_state; /* cache state (see below) */ + u_int32_t mbcl_mc_cached; /* # of cached buffers */ + u_int32_t mbcl_mc_waiter_cnt; /* # waiters on the cache */ + u_int32_t mbcl_mc_wretry_cnt; /* # of wait retries */ + u_int32_t mbcl_mc_nwretry_cnt; /* # of no-wait retry attempts */ + u_int32_t mbcl_peak_reported; /* last usage peak reported */ + u_int32_t mbcl_reserved[7]; /* for future use */ +} mb_class_stat_t; + +#define MCS_DISABLED 0 /* cache is permanently disabled */ +#define MCS_ONLINE 1 /* cache is online */ +#define MCS_PURGING 2 /* cache is being purged */ +#define MCS_OFFLINE 3 /* cache is offline (resizing) */ + +#if defined(XNU_KERNEL_PRIVATE) +/* For backwards compatibility with 32-bit userland process */ +struct omb_stat { + u_int32_t mbs_cnt; /* number of classes */ + struct omb_class_stat mbs_class[1]; /* class array */ +} __attribute__((__packed__)); +#endif /* XNU_KERNEL_PRIVATE */ + +typedef struct mb_stat { + u_int32_t mbs_cnt; /* number of classes */ +#if defined(KERNEL) || defined(__LP64__) + u_int32_t mbs_pad; /* padding */ +#endif /* KERNEL || __LP64__ */ + mb_class_stat_t mbs_class[1]; /* class array */ +} mb_stat_t; + +#ifdef PRIVATE +#define MLEAK_STACK_DEPTH 16 /* Max PC stack depth */ + +typedef struct mleak_trace_stat { + u_int64_t mltr_collisions; + u_int64_t mltr_hitcount; + u_int64_t mltr_allocs; + u_int64_t mltr_depth; + u_int64_t mltr_addr[MLEAK_STACK_DEPTH]; +} mleak_trace_stat_t; + +typedef struct mleak_stat { + u_int32_t ml_isaddr64; /* 64-bit KVA? */ + u_int32_t ml_cnt; /* number of traces */ + mleak_trace_stat_t ml_trace[1]; /* trace array */ +} mleak_stat_t; + +struct mleak_table { + u_int32_t mleak_capture; /* sampling capture counter */ + u_int32_t mleak_sample_factor; /* sample factor */ + + /* Times two active records want to occupy the same spot */ + u_int64_t alloc_collisions; + u_int64_t trace_collisions; + + /* Times new record lands on spot previously occupied by freed alloc */ + u_int64_t alloc_overwrites; + u_int64_t trace_overwrites; + + /* Times a new alloc or trace is put into the hash table */ + u_int64_t alloc_recorded; + u_int64_t trace_recorded; + + /* Total number of outstanding allocs */ + u_int64_t outstanding_allocs; + + /* Times mleak_log returned false because couldn't acquire the lock */ + u_int64_t total_conflicts; }; +#endif /* PRIVATE */ -#ifdef KERNEL -extern union mcluster *mbutl; /* virtual address of mclusters */ -extern union mcluster *embutl; /* ending virtual address of mclusters */ -extern short *mclrefcnt; /* cluster reference counts */ -extern int *mcl_paddr; /* physical addresses of clusters */ -extern struct mbstat mbstat; /* statistics */ -extern int nmbclusters; /* number of mapped clusters */ -extern union mcluster *mclfree; /* free mapped cluster list */ -extern int max_linkhdr; /* largest link-level header */ -extern int max_protohdr; /* largest protocol header */ -extern int max_hdr; /* largest link+protocol header */ -extern int max_datalen; /* MHLEN - max_hdr */ - -struct mbuf *m_copym __P((struct mbuf *, int, int, int)); -struct mbuf *m_free __P((struct mbuf *)); -struct mbuf *m_get __P((int, int)); -struct mbuf *m_getpacket __P((void)); -struct mbuf *m_getclr __P((int, int)); -struct mbuf *m_gethdr __P((int, int)); -struct mbuf *m_prepend __P((struct mbuf *, int, int)); -struct mbuf *m_pullup __P((struct mbuf *, int)); -struct mbuf *m_retry __P((int, int)); -struct mbuf *m_retryhdr __P((int, int)); -void m_adj __P((struct mbuf *, int)); -int m_clalloc __P((int, int)); -void m_freem __P((struct mbuf *)); -int m_freem_list __P((struct mbuf *)); -struct mbuf *m_devget __P((char *, int, int, struct ifnet *, void (*)())); -char *mcl_to_paddr __P((char *)); -struct mbuf *m_aux_add __P((struct mbuf *, int, int)); -struct mbuf *m_aux_find __P((struct mbuf *, int, int)); -void m_aux_delete __P((struct mbuf *, struct mbuf *)); -#endif +#ifdef KERNEL_PRIVATE +__BEGIN_DECLS + +/* + * Exported (private) + */ + +extern struct mbstat mbstat; /* statistics */ + +__END_DECLS +#endif /* KERNEL_PRIVATE */ + +#ifdef XNU_KERNEL_PRIVATE +__BEGIN_DECLS + +/* + * Not exported (xnu private) + */ + +/* flags to m_get/MGET */ +/* Need to include malloc.h to get right options for malloc */ +#include + +struct mbuf; + +/* length to m_copy to copy all */ +#define M_COPYALL 1000000000 + +#define M_DONTWAIT M_NOWAIT +#define M_WAIT M_WAITOK + +/* modes for m_copym and variants */ +#define M_COPYM_NOOP_HDR 0 /* don't copy/move pkthdr contents */ +#define M_COPYM_COPY_HDR 1 /* copy pkthdr from old to new */ +#define M_COPYM_MOVE_HDR 2 /* move pkthdr from old to new */ +#define M_COPYM_MUST_COPY_HDR 3 /* MUST copy pkthdr from old to new */ +#define M_COPYM_MUST_MOVE_HDR 4 /* MUST move pkthdr from old to new */ + +/* + * These macros are mapped to the appropriate KPIs, so that private code + * can be simply recompiled in order to be forward-compatible with future + * changes toward the struture sizes. + */ +#define MLEN mbuf_get_mlen() /* normal data len */ +#define MHLEN mbuf_get_mhlen() /* data len w/pkthdr */ + +#define MINCLSIZE mbuf_get_minclsize() /* cluster usage threshold */ + +extern void m_freem(struct mbuf *); +extern u_int64_t mcl_to_paddr(char *); +extern void m_adj(struct mbuf *, int); +extern void m_cat(struct mbuf *, struct mbuf *); +extern void m_copydata(struct mbuf *, int, int, void *); +extern struct mbuf *m_copym(struct mbuf *, int, int, int); +extern struct mbuf *m_copym_mode(struct mbuf *, int, int, int, uint32_t); +extern struct mbuf *m_get(int, int); +extern struct mbuf *m_gethdr(int, int); +extern struct mbuf *m_getpacket(void); +extern struct mbuf *m_getpackets(int, int, int); +extern struct mbuf *m_mclget(struct mbuf *, int); +extern void *m_mtod(struct mbuf *); +extern struct mbuf *m_prepend_2(struct mbuf *, int, int, int); +extern struct mbuf *m_pullup(struct mbuf *, int); +extern struct mbuf *m_split(struct mbuf *, int, int); +extern void m_mclfree(caddr_t p); + +/* + * On platforms which require strict alignment (currently for anything but + * i386 or x86_64), this macro checks whether the data pointer of an mbuf + * is 32-bit aligned (this is the expected minimum alignment for protocol + * headers), and assert otherwise. + */ +#if defined(__i386__) || defined(__x86_64__) +#define MBUF_STRICT_DATA_ALIGNMENT_CHECK_32(_m) +#else /* !__i386__ && !__x86_64__ */ +#define MBUF_STRICT_DATA_ALIGNMENT_CHECK_32(_m) do { \ + if (!IS_P2ALIGNED((_m)->m_data, sizeof (u_int32_t))) { \ + if (((_m)->m_flags & M_PKTHDR) && \ + (_m)->m_pkthdr.rcvif != NULL) { \ + panic_plain("\n%s: mbuf %p data ptr %p is not " \ + "32-bit aligned [%s: alignerrs=%lld]\n", \ + __func__, (_m), (_m)->m_data, \ + if_name((_m)->m_pkthdr.rcvif), \ + (_m)->m_pkthdr.rcvif->if_alignerrs); \ + } else { \ + panic_plain("\n%s: mbuf %p data ptr %p is not " \ + "32-bit aligned\n", \ + __func__, (_m), (_m)->m_data); \ + } \ + } \ +} while (0) +#endif /* !__i386__ && !__x86_64__ */ + +/* Maximum number of MBUF_SC values (excluding MBUF_SC_UNSPEC) */ +#define MBUF_SC_MAX_CLASSES 10 + +/* + * These conversion macros rely on the corresponding MBUF_SC and + * MBUF_TC values in order to establish the following mapping: + * + * MBUF_SC_BK_SYS ] ==> MBUF_TC_BK + * MBUF_SC_BK ] + * + * MBUF_SC_BE ] ==> MBUF_TC_BE + * MBUF_SC_RD ] + * MBUF_SC_OAM ] + * + * MBUF_SC_AV ] ==> MBUF_TC_VI + * MBUF_SC_RV ] + * MBUF_SC_VI ] + * + * MBUF_SC_VO ] ==> MBUF_TC_VO + * MBUF_SC_CTL ] + * + * The values assigned to each service class allows for a fast mapping to + * the corresponding MBUF_TC traffic class values, as well as to retrieve the + * assigned index; therefore care must be taken when comparing against these + * values. Use the corresponding class and index macros to retrieve the + * corresponding portion, and never assume that a higher class corresponds + * to a higher index. + */ +#define MBUF_SCVAL(x) ((x) & 0xffff) +#define MBUF_SCIDX(x) ((((x) >> 16) & 0xff) >> 3) +#define MBUF_SC2TC(_sc) (MBUF_SCVAL(_sc) >> 7) +#define MBUF_TC2SCVAL(_tc) ((_tc) << 7) +#define IS_MBUF_SC_BACKGROUND(_sc) (((_sc) == MBUF_SC_BK_SYS) || \ + ((_sc) == MBUF_SC_BK)) +#define IS_MBUF_SC_REALTIME(_sc) ((_sc) >= MBUF_SC_AV && (_sc) <= MBUF_SC_VO) +#define IS_MBUF_SC_BESTEFFORT(_sc) ((_sc) == MBUF_SC_BE || \ + (_sc) == MBUF_SC_RD || (_sc) == MBUF_SC_OAM) + +#define SCIDX_BK_SYS MBUF_SCIDX(MBUF_SC_BK_SYS) +#define SCIDX_BK MBUF_SCIDX(MBUF_SC_BK) +#define SCIDX_BE MBUF_SCIDX(MBUF_SC_BE) +#define SCIDX_RD MBUF_SCIDX(MBUF_SC_RD) +#define SCIDX_OAM MBUF_SCIDX(MBUF_SC_OAM) +#define SCIDX_AV MBUF_SCIDX(MBUF_SC_AV) +#define SCIDX_RV MBUF_SCIDX(MBUF_SC_RV) +#define SCIDX_VI MBUF_SCIDX(MBUF_SC_VI) +#define SCIDX_VO MBUF_SCIDX(MBUF_SC_VO) +#define SCIDX_CTL MBUF_SCIDX(MBUF_SC_CTL) + +#define SCVAL_BK_SYS MBUF_SCVAL(MBUF_SC_BK_SYS) +#define SCVAL_BK MBUF_SCVAL(MBUF_SC_BK) +#define SCVAL_BE MBUF_SCVAL(MBUF_SC_BE) +#define SCVAL_RD MBUF_SCVAL(MBUF_SC_RD) +#define SCVAL_OAM MBUF_SCVAL(MBUF_SC_OAM) +#define SCVAL_AV MBUF_SCVAL(MBUF_SC_AV) +#define SCVAL_RV MBUF_SCVAL(MBUF_SC_RV) +#define SCVAL_VI MBUF_SCVAL(MBUF_SC_VI) +#define SCVAL_VO MBUF_SCVAL(MBUF_SC_VO) +#define SCVAL_CTL MBUF_SCVAL(MBUF_SC_CTL) + +#define MBUF_VALID_SC(c) \ + (c == MBUF_SC_BK_SYS || c == MBUF_SC_BK || c == MBUF_SC_BE || \ + c == MBUF_SC_RD || c == MBUF_SC_OAM || c == MBUF_SC_AV || \ + c == MBUF_SC_RV || c == MBUF_SC_VI || c == MBUF_SC_VO || \ + c == MBUF_SC_CTL) + +#define MBUF_VALID_SCIDX(c) \ + (c == SCIDX_BK_SYS || c == SCIDX_BK || c == SCIDX_BE || \ + c == SCIDX_RD || c == SCIDX_OAM || c == SCIDX_AV || \ + c == SCIDX_RV || c == SCIDX_VI || c == SCIDX_VO || \ + c == SCIDX_CTL) + +#define MBUF_VALID_SCVAL(c) \ + (c == SCVAL_BK_SYS || c == SCVAL_BK || c == SCVAL_BE || \ + c == SCVAL_RD || c == SCVAL_OAM || c == SCVAL_AV || \ + c == SCVAL_RV || c == SCVAL_VI || c == SCVAL_VO || \ + c == SCVAL_CTL) + +extern unsigned char *mbutl; /* start VA of mbuf pool */ +extern unsigned char *embutl; /* end VA of mbuf pool */ +extern unsigned int nmbclusters; /* number of mapped clusters */ +extern int njcl; /* # of jumbo clusters */ +extern int njclbytes; /* size of a jumbo cluster */ +extern int max_hdr; /* largest link+protocol header */ +extern int max_datalen; /* MHLEN - max_hdr */ + +/* Use max_linkhdr instead of _max_linkhdr */ +extern int _max_linkhdr; /* largest link-level header */ + +/* Use max_protohdr instead of _max_protohdr */ +extern int _max_protohdr; /* largest protocol header */ + +__private_extern__ unsigned int mbuf_default_ncl(int, u_int64_t); +__private_extern__ void mbinit(void); +__private_extern__ struct mbuf *m_clattach(struct mbuf *, int, caddr_t, + void (*)(caddr_t, u_int, caddr_t), u_int, caddr_t, int, int); +__private_extern__ caddr_t m_bigalloc(int); +__private_extern__ void m_bigfree(caddr_t, u_int, caddr_t); +__private_extern__ struct mbuf *m_mbigget(struct mbuf *, int); +__private_extern__ caddr_t m_16kalloc(int); +__private_extern__ void m_16kfree(caddr_t, u_int, caddr_t); +__private_extern__ struct mbuf *m_m16kget(struct mbuf *, int); +__private_extern__ int m_reinit(struct mbuf *, int); +__private_extern__ struct mbuf *m_free(struct mbuf *); +__private_extern__ struct mbuf *m_getclr(int, int); +__private_extern__ struct mbuf *m_getptr(struct mbuf *, int, int *); +__private_extern__ unsigned int m_length(struct mbuf *); +__private_extern__ unsigned int m_length2(struct mbuf *, struct mbuf **); +__private_extern__ unsigned int m_fixhdr(struct mbuf *); +__private_extern__ struct mbuf *m_defrag(struct mbuf *, int); +__private_extern__ struct mbuf *m_defrag_offset(struct mbuf *, u_int32_t, int); +__private_extern__ struct mbuf *m_prepend(struct mbuf *, int, int); +__private_extern__ struct mbuf *m_copyup(struct mbuf *, int, int); +__private_extern__ struct mbuf *m_retry(int, int); +__private_extern__ struct mbuf *m_retryhdr(int, int); +__private_extern__ int m_freem_list(struct mbuf *); +__private_extern__ int m_append(struct mbuf *, int, caddr_t); +__private_extern__ struct mbuf *m_last(struct mbuf *); +__private_extern__ struct mbuf *m_devget(char *, int, int, struct ifnet *, + void (*)(const void *, void *, size_t)); +__private_extern__ struct mbuf *m_pulldown(struct mbuf *, int, int, int *); + +__private_extern__ struct mbuf *m_getcl(int, int, int); +__private_extern__ caddr_t m_mclalloc(int); +__private_extern__ int m_mclhasreference(struct mbuf *); +__private_extern__ void m_copy_pkthdr(struct mbuf *, struct mbuf *); +__private_extern__ void m_copy_pftag(struct mbuf *, struct mbuf *); +__private_extern__ void m_copy_classifier(struct mbuf *, struct mbuf *); + +__private_extern__ struct mbuf *m_dtom(void *); +__private_extern__ int m_mtocl(void *); +__private_extern__ union mcluster *m_cltom(int); + +__private_extern__ int m_trailingspace(struct mbuf *); +__private_extern__ int m_leadingspace(struct mbuf *); + +__private_extern__ struct mbuf *m_normalize(struct mbuf *m); +__private_extern__ void m_mchtype(struct mbuf *m, int t); +__private_extern__ void m_mcheck(struct mbuf *); + +__private_extern__ void m_copyback(struct mbuf *, int, int, const void *); +__private_extern__ struct mbuf *m_copyback_cow(struct mbuf *, int, int, + const void *, int); +__private_extern__ int m_makewritable(struct mbuf **, int, int, int); +__private_extern__ struct mbuf *m_dup(struct mbuf *m, int how); +__private_extern__ struct mbuf *m_copym_with_hdrs(struct mbuf *, int, int, int, + struct mbuf **, int *, uint32_t); +__private_extern__ struct mbuf *m_getpackethdrs(int, int); +__private_extern__ struct mbuf *m_getpacket_how(int); +__private_extern__ struct mbuf *m_getpackets_internal(unsigned int *, int, + int, int, size_t); +__private_extern__ struct mbuf *m_allocpacket_internal(unsigned int *, size_t, + unsigned int *, int, int, size_t); + +__private_extern__ int m_ext_set_prop(struct mbuf *, uint32_t, uint32_t); +__private_extern__ uint32_t m_ext_get_prop(struct mbuf *); +__private_extern__ int m_ext_paired_is_active(struct mbuf *); +__private_extern__ void m_ext_paired_activate(struct mbuf *); + +__private_extern__ void m_drain(void); + +/* + * Packets may have annotations attached by affixing a list of "packet + * tags" to the pkthdr structure. Packet tags are dynamically allocated + * semi-opaque data structures that have a fixed header (struct m_tag) + * that specifies the size of the memory block and an pair that + * identifies it. The id identifies the module and the type identifies the + * type of data for that module. The id of zero is reserved for the kernel. + * + * Note that the packet tag returned by m_tag_allocate has the default + * memory alignment implemented by malloc. To reference private data one + * can use a construct like: + * + * struct m_tag *mtag = m_tag_allocate(...); + * struct foo *p = (struct foo *)(mtag+1); + * + * if the alignment of struct m_tag is sufficient for referencing members + * of struct foo. Otherwise it is necessary to embed struct m_tag within + * the private data structure to insure proper alignment; e.g. + * + * struct foo { + * struct m_tag tag; + * ... + * }; + * struct foo *p = (struct foo *) m_tag_allocate(...); + * struct m_tag *mtag = &p->tag; + */ + +#define KERNEL_MODULE_TAG_ID 0 + +enum { + KERNEL_TAG_TYPE_NONE = 0, + KERNEL_TAG_TYPE_DUMMYNET = 1, + KERNEL_TAG_TYPE_DIVERT = 2, + KERNEL_TAG_TYPE_IPFORWARD = 3, + KERNEL_TAG_TYPE_IPFILT = 4, + KERNEL_TAG_TYPE_MACLABEL = 5, + KERNEL_TAG_TYPE_MAC_POLICY_LABEL = 6, + KERNEL_TAG_TYPE_ENCAP = 8, + KERNEL_TAG_TYPE_INET6 = 9, + KERNEL_TAG_TYPE_IPSEC = 10, + KERNEL_TAG_TYPE_DRVAUX = 11, +}; + +/* Packet tag routines */ +__private_extern__ struct m_tag *m_tag_alloc(u_int32_t, u_int16_t, int, int); +__private_extern__ struct m_tag *m_tag_create(u_int32_t, u_int16_t, int, int, + struct mbuf *); +__private_extern__ void m_tag_free(struct m_tag *); +__private_extern__ void m_tag_prepend(struct mbuf *, struct m_tag *); +__private_extern__ void m_tag_unlink(struct mbuf *, struct m_tag *); +__private_extern__ void m_tag_delete(struct mbuf *, struct m_tag *); +__private_extern__ void m_tag_delete_chain(struct mbuf *, struct m_tag *); +__private_extern__ struct m_tag *m_tag_locate(struct mbuf *, u_int32_t, + u_int16_t, struct m_tag *); +__private_extern__ struct m_tag *m_tag_copy(struct m_tag *, int); +__private_extern__ int m_tag_copy_chain(struct mbuf *, struct mbuf *, int); +__private_extern__ void m_tag_init(struct mbuf *, int); +__private_extern__ struct m_tag *m_tag_first(struct mbuf *); +__private_extern__ struct m_tag *m_tag_next(struct mbuf *, struct m_tag *); + +__END_DECLS +#endif /* XNU_KERNEL_PRIVATE */ +#ifdef KERNEL +#include +#ifdef XNU_KERNEL_PRIVATE +__BEGIN_DECLS + +__private_extern__ void m_scratch_init(struct mbuf *); +__private_extern__ u_int32_t m_scratch_get(struct mbuf *, u_int8_t **); + +__private_extern__ void m_classifier_init(struct mbuf *, uint32_t); + +__private_extern__ int m_set_service_class(struct mbuf *, mbuf_svc_class_t); +__private_extern__ mbuf_svc_class_t m_get_service_class(struct mbuf *); +__private_extern__ mbuf_svc_class_t m_service_class_from_idx(u_int32_t); +__private_extern__ mbuf_svc_class_t m_service_class_from_val(u_int32_t); +__private_extern__ int m_set_traffic_class(struct mbuf *, mbuf_traffic_class_t); +__private_extern__ mbuf_traffic_class_t m_get_traffic_class(struct mbuf *); + +#define ADDCARRY(_x) do { \ + while (((_x) >> 16) != 0) \ + (_x) = ((_x) >> 16) + ((_x) & 0xffff); \ +} while (0) + +__private_extern__ u_int16_t m_adj_sum16(struct mbuf *, u_int32_t, + u_int32_t, u_int32_t, u_int32_t); +__private_extern__ u_int16_t m_sum16(struct mbuf *, u_int32_t, u_int32_t); + +__private_extern__ void m_set_ext(struct mbuf *, struct ext_ref *, + m_ext_free_func_t, caddr_t); +__private_extern__ struct ext_ref *m_get_rfa(struct mbuf *); +__private_extern__ m_ext_free_func_t m_get_ext_free(struct mbuf *); +__private_extern__ caddr_t m_get_ext_arg(struct mbuf *); + +extern void m_do_tx_compl_callback(struct mbuf *, struct ifnet *); + +__END_DECLS +#endif /* XNU_KERNEL_PRIVATE */ +#endif /* KERNEL */ #endif /* !_SYS_MBUF_H_ */