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Sync mbuf flags, types, and external buffer types with <sys/mbuf.h>.

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Sponsored by:	Netflix
This commit is contained in:
John Baldwin 2019-06-28 19:49:47 +00:00
parent 7b29ab7e25
commit 773123546b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=349516
1 changed files with 37 additions and 8 deletions
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45
share/man/man9/mbuf.9
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@ -209,11 +209,21 @@ The
.Vt mbuf
flag bits are defined as follows:
.Bd -literal
/* mbuf flags */
#define M_EXT 0x00000001 /* has associated external storage */
#define M_PKTHDR 0x00000002 /* start of record */
#define M_EOR 0x00000004 /* end of record */
#define M_RDONLY 0x00000008 /* associated data marked read-only */
#define M_NOMAP 0x00000100 /* mbuf data is unmapped (soon from Drew) */
#define M_NOFREE 0x00000200 /* do not free mbuf, embedded in cluster */
#define M_BCAST 0x00000010 /* send/received as link-level broadcast */
#define M_MCAST 0x00000020 /* send/received as link-level multicast */
#define M_PROMISC 0x00000040 /* packet was not for us */
#define M_VLANTAG 0x00000080 /* ether_vtag is valid */
#define M_TSTMP 0x00000400 /* rcv_tstmp field is valid */
#define M_TSTMP_HPREC 0x00000800 /* rcv_tstmp is high-prec, typically
hw-stamped on port (useful for IEEE 1588
and 802.1AS) */
#define M_PROTO1 0x00001000 /* protocol-specific */
#define M_PROTO2 0x00002000 /* protocol-specific */
#define M_PROTO3 0x00004000 /* protocol-specific */
@ -226,27 +236,34 @@ flag bits are defined as follows:
#define M_PROTO10 0x00200000 /* protocol-specific */
#define M_PROTO11 0x00400000 /* protocol-specific */
#define M_PROTO12 0x00800000 /* protocol-specific */
/* mbuf pkthdr flags (also stored in m_flags) */
#define M_BCAST 0x00000010 /* send/received as link-level broadcast */
#define M_MCAST 0x00000020 /* send/received as link-level multicast */
.Ed
.Pp
The available
.Vt mbuf
types are defined as follows:
.Bd -literal
/* mbuf types */
#define MT_DATA 1 /* dynamic (data) allocation */
#define MT_HEADER MT_DATA /* packet header */
#define MT_VENDOR1 4 /* for vendor-internal use */
#define MT_VENDOR2 5 /* for vendor-internal use */
#define MT_VENDOR3 6 /* for vendor-internal use */
#define MT_VENDOR4 7 /* for vendor-internal use */
#define MT_SONAME 8 /* socket name */
#define MT_EXP1 9 /* for experimental use */
#define MT_EXP2 10 /* for experimental use */
#define MT_EXP3 11 /* for experimental use */
#define MT_EXP4 12 /* for experimental use */
#define MT_CONTROL 14 /* extra-data protocol message */
#define MT_OOBDATA 15 /* expedited data */
#define MT_EXTCONTROL 15 /* control message with externalized contents */
#define MT_OOBDATA 16 /* expedited data */
.Ed
.Pp
The available external buffer types are defined as follows:
.Bd -literal
/* external buffer types */
#define EXT_CLUSTER 1 /* mbuf cluster */
#define EXT_SFBUF 2 /* sendfile(2)'s sf_bufs */
#define EXT_JUMBOP 3 /* jumbo cluster 4096 bytes */
@ -254,6 +271,18 @@ The available external buffer types are defined as follows:
#define EXT_JUMBO16 5 /* jumbo cluster 16184 bytes */
#define EXT_PACKET 6 /* mbuf+cluster from packet zone */
#define EXT_MBUF 7 /* external mbuf reference */
#define EXT_RXRING 8 /* data in NIC receive ring */
#define EXT_VENDOR1 224 /* for vendor-internal use */
#define EXT_VENDOR2 225 /* for vendor-internal use */
#define EXT_VENDOR3 226 /* for vendor-internal use */
#define EXT_VENDOR4 227 /* for vendor-internal use */
#define EXT_EXP1 244 /* for experimental use */
#define EXT_EXP2 245 /* for experimental use */
#define EXT_EXP3 246 /* for experimental use */
#define EXT_EXP4 247 /* for experimental use */
#define EXT_NET_DRV 252 /* custom ext_buf provided by net driver(s) */
#define EXT_MOD_TYPE 253 /* custom module's ext_buf type */
#define EXT_DISPOSABLE 254 /* can throw this buffer away w/page flipping */