/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 1999-2019 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
* 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_
+#ifndef _SYS_MBUF_H_
+#define _SYS_MBUF_H_
#include <sys/appleapiopts.h>
-#include <sys/lock.h>
+#include <sys/cdefs.h>
+#include <sys/_types/_u_int32_t.h> /* u_int32_t */
+#include <sys/_types/_u_int64_t.h> /* u_int64_t */
+#include <sys/_types/_u_short.h> /* u_short */
+#ifdef KERNEL
+#include <sys/kpi_mbuf.h>
+#endif
+
+#ifdef XNU_KERNEL_PRIVATE
+#include <sys/lock.h>
+#include <sys/queue.h>
+#include <machine/endian.h>
/*
* 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 NMBPGSHIFT (PAGE_SHIFT - MSIZESHIFT)
+#define NMBPG (1 << NMBPGSHIFT) /* # of mbufs per page */
+
+#define NCLPGSHIFT (PAGE_SHIFT - MCLSHIFT)
+#define NCLPG (1 << NCLPGSHIFT) /* # of cl per page */
+
+#define NBCLPGSHIFT (PAGE_SHIFT - MBIGCLSHIFT)
+#define NBCLPG (1 << NBCLPGSHIFT) /* # of big cl per page */
-#ifdef __APPLE_API_UNSTABLE
-#define MLEN (MSIZE - sizeof(struct m_hdr)) /* normal data len */
-#define MHLEN (MLEN - sizeof(struct pkthdr)) /* data len w/pkthdr */
+#define NMBPCLSHIFT (MCLSHIFT - MSIZESHIFT)
+#define NMBPCL (1 << NMBPCLSHIFT) /* # of mbufs per cl */
-#define MINCLSIZE (MHLEN + MLEN) /* smallest amount to put in cluster */
-#define M_MAXCOMPRESS (MHLEN / 2) /* max amount to copy for compression */
+#define NCLPJCLSHIFT (M16KCLSHIFT - MCLSHIFT)
+#define NCLPJCL (1 << NCLPJCLSHIFT) /* # of cl per jumbo cl */
-#define NMBPCL (sizeof(union mcluster) / sizeof(struct mbuf))
+#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_mtod(m))
+#define mtod(m, t) ((t)m_mtod(m))
+#define mtodo(m, o) ((void *)(mtod(m, uint8_t *) + (o)))
#define dtom(x) m_dtom(x)
-#define mtocl(x) m_mtocl(x)
-#define cltom(x) m_cltom(x)
-
-#define MCLREF(p) m_mclref(p)
-#define MCLUNREF(p) m_mclunref(p)
/* 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 */
};
-/* 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 */
+#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 */
+#define PF_TAG_REASSEMBLED 0x20 /* pkt reassembled by PF */
+#define PF_TAG_REFRAGMENTED 0x40 /* pkt refragmented by PF */
+/*
+ * 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 */
+};
+
+/*
+ * PF fragment tag
+ */
+struct pf_fragment_tag {
+ uint32_t ft_id; /* fragment id */
+ uint16_t ft_hdrlen; /* header length of reassembled pkt */
+ uint16_t ft_unfragpartlen; /* length of the per-fragment headers */
+ uint16_t ft_extoff; /* last extension header offset or 0 */
+ uint16_t ft_maxlen; /* maximum fragment payload length */
+};
+
+/*
+ * 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 */
+ pid_t pid;
+ pid_t e_pid;
+ } __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 tx_tcp_pid proto_mtag.__pr_u.tcp.tm_tcp.__offload.__tx.pid
+#define tx_tcp_e_pid proto_mtag.__pr_u.tcp.tm_tcp.__offload.__tx.e_pid
+#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 udp_mtag {
+ pid_t _pid;
+ pid_t _e_pid;
+#define tx_udp_pid proto_mtag.__pr_u.udp._pid
+#define tx_udp_e_pid proto_mtag.__pr_u.udp._e_pid
+};
+
+struct rawip_mtag {
+ pid_t _pid;
+ pid_t _e_pid;
+#define tx_rawip_pid proto_mtag.__pr_u.rawip._pid
+#define tx_rawip_e_pid proto_mtag.__pr_u.rawip._e_pid
+};
+
+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 */
+ struct udp_mtag udp; /* UDP specific */
+ struct rawip_mtag rawip; /* raw IPv4/IPv6 specific */
+ } __pr_u;
+};
+
+/*
+ * NECP specific mbuf tag.
+ */
+struct necp_mtag_ {
+ u_int32_t necp_policy_id;
+ u_int32_t necp_skip_policy_id;
+ u_int32_t necp_route_rule_id;
+ u_int16_t necp_last_interface_index;
+ u_int16_t necp_app_id;
+};
+
+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 */
-#ifdef KERNEL_PRIVATE
- /* Note: csum_flags is used for hardware checksum and VLAN */
-#endif KERNEL_PRIVATE
- int csum_flags; /* flags regarding checksum */
- int csum_data; /* data field used by csum routines */
- struct mbuf *aux; /* extra data buffer; ipsec/others */
-#ifdef KERNEL_PRIVATE
- u_short vlan_tag; /* VLAN tag, host byte order */
- u_short reserved_1; /* for future use */
-#else KERNEL_PRIVATE
- void *reserved1; /* for future use */
-#endif KERNEL_PRIVATE
- 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
+ /*
+ * Generic data field used by csum routines.
+ * It gets used differently in different contexts.
+ */
+ u_int32_t csum_data;
+ };
+ 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; /* TX: enqueue time, RX: receive timestamp */
+
+ /*
+ * 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 */
+
+/*
+ * FLOWSRC_MPKL_INPUT is not a true flow data source and is used for
+ * multi-layer packet logging. We're usurping the pkt_flowsrc field because
+ * the mbuf packet header ran out of space and pkt_flowsrc is normally
+ * used on output so we assume we can safely overwrite the normal semantic of
+ * the field.
+ * This value is meant to be used on incoming packet from a lower level protocol
+ * to pass information to some upper level protocol. When FLOWSRC_MPKL_INPUT
+ * is set, the following fields are used:
+ * - pkt_proto: the IP protocol ID of the lower level protocol
+ * - pkt_flowid: the identifier of the packet at the lower protocol.
+ * For example ESP would set pkt_proto to IPPROTO_ESP and pkt_flowid to the SPI.
+ */
+
+/*
+ * 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)(caddr_t , u_int, caddr_t); /* 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;
+ caddr_t ext_buf; /* start of buffer */
+ 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_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;
};
-#define m_next m_hdr.mh_next
-#define m_len m_hdr.mh_len
-#define m_data m_hdr.mh_data
-#define m_type m_hdr.mh_type
-#define m_flags m_hdr.mh_flags
-#define m_nextpkt m_hdr.mh_nextpkt
-#define m_act m_nextpkt
-#define m_pkthdr M_dat.MH.MH_pkthdr
-#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
-
-/* mbuf flags */
-#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_PROTO4 0x0040 /* protocol-specific */
-#define M_PROTO5 0x0080 /* protocol-specific */
-
-/* mbuf pkthdr flags, also in m_flags */
-#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_FIRSTFRAG 0x0800 /* packet is first fragment */
-#define M_LASTFRAG 0x1000 /* packet is last fragment */
+#define m_next m_hdr.mh_next
+#define m_len m_hdr.mh_len
+#define m_data m_hdr.mh_data
+#define m_type m_hdr.mh_type
+#define m_flags m_hdr.mh_flags
+#define m_nextpkt m_hdr.mh_nextpkt
+#define m_act m_nextpkt
+#define m_pkthdr M_dat.MH.MH_pkthdr
+#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 (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 */
+
+/* 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_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 */
+
+/*
+ * 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_PROTO1|M_PROTO1|M_PROTO2|M_PROTO3 | \
- M_PROTO4|M_PROTO5|M_BCAST|M_MCAST|M_FRAG)
+#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 [freebsd4.1]*/
+/* 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_TCP_SUM16 0x1000 /* simple TCP Sum16 computation */
-
+#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) /* XXX add ipv6 here too? */
-#ifdef KERNEL_PRIVATE
+#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 <net/if_var.h>
*/
-/* bottom 16 bits reserved for hardware checksum */
-#define CSUM_CHECKSUM_MASK 0xffff
/* VLAN tag present */
-#define CSUM_VLAN_TAG_VALID 0x10000 /* vlan_tag field is valid */
-#endif KERNEL_PRIVATE
-
+#define CSUM_VLAN_TAG_VALID 0x00010000 /* vlan_tag field is valid */
-/* mbuf types */
-#define MT_FREE 0 /* should be on free list */
-#define MT_DATA 1 /* dynamic (data) allocation */
-#define MT_HEADER 2 /* packet header */
-#define MT_SOCKET 3 /* socket structure */
-#define MT_PCB 4 /* protocol control block */
-#define MT_RTABLE 5 /* routing tables */
-#define MT_HTABLE 6 /* IMP host tables */
-#define MT_ATABLE 7 /* address resolution tables */
-#define MT_SONAME 8 /* socket name */
-#define MT_SOOPTS 10 /* socket options */
-#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? */
+/* checksum start adjustment has been done */
+#define CSUM_ADJUST_DONE 0x00020000
-/* flags to m_get/MGET */
-/* Need to include malloc.h to get right options for malloc */
-#include <sys/malloc.h>
+/* TCP Segment Offloading requested on this mbuf */
+#define CSUM_TSO_IPV4 0x00100000 /* This mbuf needs to be segmented by the NIC */
+#define CSUM_TSO_IPV6 0x00200000 /* This mbuf needs to be segmented by the NIC */
-#define M_DONTWAIT M_NOWAIT
-#define M_WAIT M_WAITOK
+#define TSO_IPV4_OK(_ifp, _m) \
+ (((_ifp)->if_hwassist & IFNET_TSO_IPV4) && \
+ ((_m)->m_pkthdr.csum_flags & CSUM_TSO_IPV4)) \
-#ifdef __APPLE_API_PRIVATE
+#define TSO_IPV4_NOTOK(_ifp, _m) \
+ (!((_ifp)->if_hwassist & IFNET_TSO_IPV4) && \
+ ((_m)->m_pkthdr.csum_flags & CSUM_TSO_IPV4)) \
-/*
- * mbuf utility macros:
- *
- * MBUFLOCK(code)
- * prevents a section of code from from being interrupted by network
- * drivers.
- */
+#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)) \
-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);
+#endif /* XNU_KERNEL_PRIVATE */
-#endif /* __APPLE_API_PRIVATE */
+/* mbuf types */
+#define MT_FREE 0 /* should be on free list */
+#define MT_DATA 1 /* dynamic (data) allocation */
+#define MT_HEADER 2 /* packet header */
+#define MT_SOCKET 3 /* socket structure */
+#define MT_PCB 4 /* protocol control block */
+#define MT_RTABLE 5 /* routing tables */
+#define MT_HTABLE 6 /* IMP host tables */
+#define MT_ATABLE 7 /* address resolution tables */
+#define MT_SONAME 8 /* socket name */
+#define MT_SOOPTS 10 /* socket options */
+#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_TAG 16 /* volatile metadata associated to pkts */
+#define MT_MAX 32 /* enough? */
+#ifdef XNU_KERNEL_PRIVATE
/*
* mbuf allocation/deallocation macros:
*
#define MCHECK(m)
#endif
-#ifdef __APPLE_API_PRIVATE
-extern struct mbuf *mfree; /* mbuf free list */
-extern simple_lock_data_t mbuf_slock;
-#endif /* __APPLE_API_PRIVATE */
-
+#define MGET(m, how, type) ((m) = m_get((how), (type)))
-#define MGET(m, how, type) ((m) = m_get((how), (type)))
-
-#define MGETHDR(m, how, type) ((m) = m_gethdr((how), (type)))
+#define MGETHDR(m, how, type) ((m) = m_gethdr((how), (type)))
/*
* Mbuf cluster macros.
* pointer while on the free list.
*/
union mcluster {
- union mcluster *mcl_next;
- char mcl_buf[MCLBYTES];
+ union mcluster *mcl_next;
+ char mcl_buf[MCLBYTES];
};
-#define MCLALLOC(p, how) ((p) = m_mclalloc(how))
+#define MCLALLOC(p, how) ((p) = m_mclalloc(how))
+
+#define MCLFREE(p) m_mclfree(p)
-#define MCLFREE(p) m_mclfree(p)
+#define MCLGET(m, how) ((m) = m_mclget(m, how))
-#define MCLGET(m, how) ((m) = m_mclget(m, how))
+/*
+ * Mbuf big cluster
+ */
+union mbigcluster {
+ union mbigcluster *mbc_next;
+ char mbc_buf[MBIGCLBYTES];
+};
+
+/*
+ * Mbuf jumbo cluster
+ */
+union m16kcluster {
+ union m16kcluster *m16kcl_next;
+ char m16kcl_buf[M16KCLBYTES];
+};
-#define MCLHASREFERENCE(m) m_mclhasreference(m)
+#define MCLHASREFERENCE(m) m_mclhasreference(m)
/*
* MFREE(struct mbuf *m, struct mbuf *n)
* 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) m_copy_pkthdr(to, from)
+#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)
+
+/*
+ * Evaluate TRUE if it's safe to write to the mbuf m's data region (this can
+ * be both the local data payload, or an external buffer area, depending on
+ * whether M_EXT is set).
+ */
+#define M_WRITABLE(m) (((m)->m_flags & M_EXT) == 0 || !MCLHASREFERENCE(m))
/*
- * 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.
+ * 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 M_ALIGN(m, len) \
- { (m)->m_data += (MLEN - (len)) &~ (sizeof(long) - 1); }
+#define MLEN mbuf_get_mlen() /* normal mbuf data len */
+#define MHLEN mbuf_get_mhlen() /* data len in an mbuf w/pkthdr */
+#define MINCLSIZE mbuf_get_minclsize() /* cluster usage threshold */
/*
- * As above, for mbufs allocated with m_gethdr/MGETHDR
- * or initialized by M_COPY_PKTHDR.
+ * Return the address of the start of the buffer associated with an mbuf,
+ * handling external storage, packet-header mbufs, and regular data mbufs.
*/
-#define MH_ALIGN(m, len) \
- { (m)->m_data += (MHLEN - (len)) &~ (sizeof(long) - 1); }
+#define M_START(m) \
+ (((m)->m_flags & M_EXT) ? (m)->m_ext.ext_buf : \
+ ((m)->m_flags & M_PKTHDR) ? &(m)->m_pktdat[0] : \
+ &(m)->m_dat[0])
/*
- * Compute the amount of space available
- * before the current start of data in an mbuf.
- * Subroutine - data not available if certain references.
+ * Return the size of the buffer associated with an mbuf, handling external
+ * storage, packet-header mbufs, and regular data mbufs.
*/
-#define M_LEADINGSPACE(m) m_leadingspace(m)
+#define M_SIZE(m) \
+ (((m)->m_flags & M_EXT) ? (m)->m_ext.ext_size : \
+ ((m)->m_flags & M_PKTHDR) ? MHLEN : \
+ MLEN)
+
+#define M_ALIGN(m, len) m_align(m, len)
+#define MH_ALIGN(m, len) m_align(m, len)
+#define MEXT_ALIGN(m, len) m_align(m, len)
/*
- * Compute the amount of space available
- * after the end of data in an mbuf.
- * Subroutine - data not available if certain references.
+ * Compute the amount of space available before the current start of data in
+ * an mbuf.
+ *
+ * The M_WRITABLE() is a temporary, conservative safety measure: the burden
+ * of checking writability of the mbuf data area rests solely with the caller.
*/
-#define M_TRAILINGSPACE(m) m_trailingspace(m)
+#define M_LEADINGSPACE(m) \
+ (M_WRITABLE(m) ? ((m)->m_data - M_START(m)) : 0)
+
+/*
+ * Compute the amount of space available after the end of data in an mbuf.
+ *
+ * The M_WRITABLE() is a temporary, conservative safety measure: the burden
+ * of checking writability of the mbuf data area rests solely with the caller.
+ */
+#define M_TRAILINGSPACE(m) \
+ (M_WRITABLE(m) ? \
+ ((M_START(m) + M_SIZE(m)) - ((m)->m_data + (m)->m_len)) : 0)
/*
* Arrange to prepend space of size plen to mbuf m.
* 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) ((m) = m_prepend_2((m), (plen), (how)))
+#define M_PREPEND(m, plen, how, align) \
+ ((m) = m_prepend_2((m), (plen), (how), (align)))
/* change mbuf to new type */
-#define MCHTYPE(m, t) m_mchtype(m, t)
-
-/* length to m_copy to copy all */
-#define M_COPYALL 1000000000
+#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 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)
/*
- * Mbuf statistics.
+ * 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 */ \
+}
+
+#define MBUFQ_INIT(q) do { \
+ MBUFQ_FIRST(q) = NULL; \
+ (q)->mq_last = &MBUFQ_FIRST(q); \
+} while (0)
+
+#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)
+/*
+ * 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 - \
+ __builtin_offsetof(struct mbuf, m_nextpkt))))
+
+#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_split __P((struct mbuf *, 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_prepend_2 __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_pulldown __P((struct mbuf*, int, int, int*));
-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 *));
-
-struct mbuf *m_mclget __P((struct mbuf *, int));
-caddr_t m_mclalloc __P((int));
-void m_mclfree __P((caddr_t p));
-int m_mclhasreference __P((struct mbuf *));
-void m_copy_pkthdr __P((struct mbuf *, struct mbuf*));
-
-int m_mclref __P((struct mbuf *));
-int m_mclunref __P((struct mbuf *));
-
-void * m_mtod __P((struct mbuf *));
-struct mbuf * m_dtom __P((void *));
-int m_mtocl __P((void *));
-union mcluster *m_cltom __P((int ));
-
-int m_trailingspace __P((struct mbuf *));
-int m_leadingspace __P((struct mbuf *));
-
-void m_mchtype __P((struct mbuf *m, int t));
-
-void m_mcheck __P((struct mbuf*));
+#ifdef KERNEL_PRIVATE
+__BEGIN_DECLS
-#endif
-#endif /* __APPLE_API_UNSTABLE */
-#endif /* !_SYS_MBUF_H_ */
+/*
+ * 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 <sys/malloc.h>
+
+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 */
+
+extern void m_freem(struct mbuf *) __XNU_INTERNAL(m_freem);
+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_SIG ]
+ *
+ * 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_SIG MBUF_SCIDX(MBUF_SC_SIG)
+#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_SIG MBUF_SCVAL(MBUF_SC_SIG)
+#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_SIG || \
+ 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_SIG || \
+ 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_SIG || \
+ c == SCVAL_VO || 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 *) __XNU_INTERNAL(m_free);
+__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__ void m_align(struct mbuf *, int);
+
+__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 mbuf_drain(boolean_t);
+
+/*
+ * 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 <id,type> 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,
+ KERNEL_TAG_TYPE_CFIL_UDP = 13,
+ KERNEL_TAG_TYPE_PF_REASS = 14,
+};
+
+/* 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 *);
+
+__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 *);
+
+__private_extern__ void m_do_tx_compl_callback(struct mbuf *, struct ifnet *);
+__private_extern__ mbuf_tx_compl_func m_get_tx_compl_callback(u_int32_t);
+
+__END_DECLS
+#endif /* XNU_KERNEL_PRIVATE */
+#endif /* !_SYS_MBUF_H_ */
projects / apple / xnu.git / blobdiff