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Diffstat (limited to 'share/dtrace/mbuf.d')
| -rw-r--r-- | share/dtrace/mbuf.d | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/share/dtrace/mbuf.d b/share/dtrace/mbuf.d new file mode 100644 index 0000000..f858459 --- /dev/null +++ b/share/dtrace/mbuf.d @@ -0,0 +1,210 @@ +/* + * 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; +}; |
