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/*
* Copyright (c) 2016 George V. Neville-Neil
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*
* Translators and flags for the mbuf structure. FreeBSD specific code.
*
*/
#pragma D depends_on module kernel
/*
* mbuf flags of global significance and layer crossing.
* Those of only protocol/layer specific significance are to be mapped
* to M_PROTO[1-12] and cleared at layer handoff boundaries.
* NB: Limited to the lower 24 bits.
*/
#pragma D binding "1.6.3" M_EXT
inline int M_EXT = 0x00000001; /* has associated external storage */
#pragma D binding "1.6.3" M_PKTHDR
inline int M_PKTHDR = 0x00000002; /* start of record */
#pragma D binding "1.6.3" M_EOR
inline int M_EOR = 0x00000004; /* end of record */
#pragma D binding "1.6.3" M_RDONLY
inline int M_RDONLY = 0x00000008; /* associated data is marked read-only */
#pragma D binding "1.6.3" M_BCAST
inline int M_BCAST = 0x00000010; /* send/received as link-level broadcast */
#pragma D binding "1.6.3" M_MCAST
inline int M_MCAST = 0x00000020; /* send/received as link-level multicast */
#pragma D binding "1.6.3" M_PROMISC
inline int M_PROMISC = 0x00000040; /* packet was not for us */
#pragma D binding "1.6.3" M_VLANTAG
inline int M_VLANTAG = 0x00000080; /* ether_vtag is valid */
#pragma D binding "1.6.3" M_UNUSED_8
inline int M_UNUSED_8 = 0x00000100; /* --available-- */
#pragma D binding "1.6.3" M_NOFREE
inline int M_NOFREE = 0x00000200; /* do not free mbuf, embedded in cluster */
#pragma D binding "1.6.3" M_PROTO1
inline int M_PROTO1 = 0x00001000; /* protocol-specific */
#pragma D binding "1.6.3" M_PROTO2
inline int M_PROTO2 = 0x00002000; /* protocol-specific */
#pragma D binding "1.6.3" M_PROTO3
inline int M_PROTO3 = 0x00004000; /* protocol-specific */
#pragma D binding "1.6.3" M_PROTO4
inline int M_PROTO4 = 0x00008000; /* protocol-specific */
#pragma D binding "1.6.3" M_PROTO5
inline int M_PROTO5 = 0x00010000; /* protocol-specific */
#pragma D binding "1.6.3" M_PROTO6
inline int M_PROTO6 = 0x00020000; /* protocol-specific */
#pragma D binding "1.6.3" M_PROTO7
inline int M_PROTO7 = 0x00040000; /* protocol-specific */
#pragma D binding "1.6.3" M_PROTO8
inline int M_PROTO8 = 0x00080000; /* protocol-specific */
#pragma D binding "1.6.3" M_PROTO9
inline int M_PROTO9 = 0x00100000; /* protocol-specific */
#pragma D binding "1.6.3" M_PROTO10
inline int M_PROTO10 = 0x00200000; /* protocol-specific */
#pragma D binding "1.6.3" M_PROTO11
inline int M_PROTO11 = 0x00400000; /* protocol-specific */
#pragma D binding "1.6.3" M_PROTO12
inline int M_PROTO12 = 0x00800000; /* protocol-specific */
#pragma D binding "1.6.3" mbufflags_string
inline string mbufflags_string[uint32_t flags] =
flags & M_EXT ? "M_EXT" :
flags & M_PKTHDR ? "M_PKTHDR" :
flags & M_EOR ? "M_EOR" :
flags & M_RDONLY ? "M_RDONLY" :
flags & M_BCAST ? "M_BCAST" :
flags & M_MCAST ? "M_MCAST" :
flags & M_PROMISC ? "M_PROMISC" :
flags & M_VLANTAG ? "M_VLANTAG" :
flags & M_UNUSED_8 ? "M_UNUSED_8" :
flags & M_NOFREE ? "M_NOFREE" :
flags & M_PROTO1 ? "M_PROTO1" :
flags & M_PROTO2 ? "M_PROTO2" :
flags & M_PROTO3 ? "M_PROTO3" :
flags & M_PROTO4 ? "M_PROTO4" :
flags & M_PROTO5 ? "M_PROTO5" :
flags & M_PROTO6 ? "M_PROTO6" :
flags & M_PROTO7 ? "M_PROTO7" :
flags & M_PROTO8 ? "M_PROTO8" :
flags & M_PROTO9 ? "M_PROTO9" :
flags & M_PROTO10 ? "M_PROTO10" :
flags & M_PROTO11 ? "M_PROTO11" :
flags & M_PROTO12 ? "M_PROTO12" :
"none" ;
/*
* Packet tag structure (see below for details).
*/
typedef struct m_tag {
u_int16_t m_tag_id; /* Tag ID */
u_int16_t m_tag_len; /* Length of data */
u_int32_t m_tag_cookie; /* ABI/Module ID */
} m_tag_t;
/*
* Record/packet header in first mbuf of chain; valid only if M_PKTHDR is set.
* Size ILP32: 48
* LP64: 56
* Compile-time assertions in uipc_mbuf.c test these values to ensure that
* they are correct.
*/
typedef struct pkthdr {
/* struct ifnet *rcvif; */ /* rcv interface */
int32_t len; /* total packet length */
/* Layer crossing persistent information. */
uint32_t flowid; /* packet's 4-tuple system */
uint64_t csum_flags; /* checksum and offload features */
uint16_t fibnum; /* this packet should use this fib */
uint8_t cosqos; /* class/quality of service */
uint8_t rsstype; /* hash type */
} pkthdr_t;
/*
* Description of external storage mapped into mbuf; valid only if M_EXT is
* set.
* Size ILP32: 28
* LP64: 48
* Compile-time assertions in uipc_mbuf.c test these values to ensure that
* they are correct.
*/
typedef struct m_ext {
volatile u_int *ext_cnt; /* pointer to ref count info */
caddr_t ext_buf; /* start of buffer */
uint32_t ext_size; /* size of buffer, for ext_free */
uint32_t ext_type:8, /* type of external storage */
ext_flags:24; /* external storage mbuf flags */
void *ext_arg1; /* optional argument pointer */
void *ext_arg2; /* optional argument pointer */
} m_ext_t;
/*
* The core of the mbuf object along with some shortcut defines for practical
* purposes.
*/
struct mbuf {
uintptr_t mbuf_addr;
/*
* Header present at the beginning of every mbuf.
* Size ILP32: 24
* LP64: 32
* Compile-time assertions in uipc_mbuf.c test these values to ensure
* that they are correct.
*/
caddr_t m_data; /* location of data */
int32_t m_len; /* amount of data in this mbuf */
uint32_t m_type:8, /* type of data in this mbuf */
m_flags:24; /* flags; see below */
/*
* A set of optional headers (packet header, external storage header)
* and internal data storage. Historically, these arrays were sized
* to MHLEN (space left after a packet header) and MLEN (space left
* after only a regular mbuf header); they are now variable size in
* order to support future work on variable-size mbufs.
*/
/* union { */
/* struct { */
/* struct pkthdr m_pkthdr; */
/* union { */
/* struct m_ext m_ext; */
/* char m_pktdat[0]; */
/* }; */
/* }; */
/* char m_dat[0]; */
/* }; */
char *m_dat;
};
typedef struct mbufinfo {
uintptr_t mbuf_addr;
caddr_t m_data;
int32_t m_len;
uint8_t m_type;
uint32_t m_flags;
} mbufinfo_t;
translator mbufinfo_t < struct mbuf *p > {
mbuf_addr = (uintptr_t)p;
m_data = p->m_data;
m_len = p->m_len;
m_type = p->m_type & 0xff000000;
m_flags = p->m_type & 0x00ffffff;
};
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