#include <sys/malloc.h>
Include dependency graph for mbuf.h:
Go to the source code of this file.
Data Structures | |
| struct | m_hdr |
| struct | pkthdr |
| struct | m_ext |
| struct | mbuf |
| struct | mbstat |
| union | mcluster |
Macros | |
| #define | MLEN (MSIZE - sizeof(struct m_hdr)) /* normal data len */ |
| #define | MHLEN (MLEN - sizeof(struct pkthdr)) /* data len w/pkthdr */ |
| #define | MINCLSIZE (MHLEN + MLEN) /* smallest amount to put in cluster */ |
| #define | M_MAXCOMPRESS (MHLEN / 2) /* max amount to copy for compression */ |
| #define | mtod(m, t) ((t)((m)->m_data)) |
| #define | dtom(x) ((struct mbuf *)((intptr_t)(x) & ~(MSIZE-1))) |
| #define | mtocl(x) (((uintptr_t)(x) - (uintptr_t)mbutl) >> MCLSHIFT) |
| #define | cltom(x) ((caddr_t)((u_long)mbutl + ((u_long)(x) << MCLSHIFT))) |
| #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_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_BCAST 0x0100 /* send/received as link-level broadcast */ |
| #define | M_MCAST 0x0200 /* send/received as link-level multicast */ |
| #define | M_COPYFLAGS (M_PKTHDR|M_EOR|M_PROTO1|M_BCAST|M_MCAST) |
| #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 | M_DONTWAIT M_NOWAIT |
| #define | M_WAIT M_WAITOK |
| #define | MBUFLOCK(code) |
| #define | MGET(m, how, type) |
| #define | MGETHDR(m, how, type) |
| #define | MCLALLOC(p, how) |
| #define | MCLGET(m, how) |
| #define | MCLFREE(p) |
| #define | MFREE(m, n) |
| #define | M_COPY_PKTHDR(to, from) |
| #define | M_ALIGN(m, len) |
| #define | MH_ALIGN(m, len) |
| #define | M_LEADINGSPACE(m) |
| #define | M_TRAILINGSPACE(m) |
| #define | M_PREPEND(m, plen, how) |
| #define | MCHTYPE(m, t) |
| #define | M_COPYALL (uint32_t)1000000000L |
| #define | m_copy(m, o, l) m_copym((m), (o), (l), M_DONTWAIT) |
Macro Definition Documentation
◆ M_ALIGN
| #define M_ALIGN | ( | m, | |
| len | |||
| ) |
Value:
do { \
(m)->m_data += (MLEN - (len)) & ~(sizeof(long) - 1); \
} while (0)
◆ M_COPY_PKTHDR
| #define M_COPY_PKTHDR | ( | to, | |
| from | |||
| ) |
Value:
{ \
(to)->m_pkthdr = (from)->m_pkthdr; \
(to)->m_flags = (from)->m_flags & M_COPYFLAGS; \
(to)->m_data = (to)->m_pktdat; \
}
◆ M_LEADINGSPACE
| #define M_LEADINGSPACE | ( | m | ) |
Value:
((m)->m_flags & M_EXT ? /* (m)->m_data - (m)->m_ext.ext_buf */ 0 : \
(m)->m_flags & M_PKTHDR ? (m)->m_data - (m)->m_pktdat : \
(m)->m_data - (m)->m_dat)
◆ M_PREPEND
| #define M_PREPEND | ( | m, | |
| plen, | |||
| how | |||
| ) |
Value:
{ \
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); \
}
◆ M_TRAILINGSPACE
| #define M_TRAILINGSPACE | ( | m | ) |
◆ MBUFLOCK
| #define MBUFLOCK | ( | code | ) |
◆ MCHTYPE
| #define MCHTYPE | ( | m, | |
| t | |||
| ) |
◆ MCLALLOC
| #define MCLALLOC | ( | p, | |
| how | |||
| ) |
◆ MCLFREE
| #define MCLFREE | ( | p | ) |
◆ MCLGET
| #define MCLGET | ( | m, | |
| how | |||
| ) |
◆ MFREE
| #define MFREE | ( | m, | |
| n | |||
| ) |
Value:
MBUFLOCK( \
mbstat.m_mtypes[(m)->m_type]--; \
if ((m)->m_flags & M_EXT) { \
if ((m)->m_ext.ext_free) \
(*((m)->m_ext.ext_free))((m)->m_ext.ext_buf, \
(m)->m_ext.ext_size); \
else { \
char *p = (m)->m_ext.ext_buf; \
if (--mclrefcnt[mtocl(p)] == 0) { \
((union mcluster *)(p))->mcl_next = mclfree; \
mclfree = (union mcluster *)(p); \
mbstat.m_clfree++; \
} \
} \
} \
(n) = (m)->m_next; \
(m)->m_type = MT_FREE; \
mbstat.m_mtypes[MT_FREE]++; \
(m)->m_next = mmbfree; \
mmbfree = (m); \
)
Definition: mbuf.h:191
Definition: mbuf.h:169
Definition: mbuf.h:90
◆ MGET
| #define MGET | ( | m, | |
| how, | |||
| type | |||
| ) |
Value:
{ \
int _ms = splimp(); \
if (mmbfree == 0) \
(void)m_mballoc(1, (how)); \
if (((m) = mmbfree) != 0) { \
mmbfree = (m)->m_next; \
mbstat.m_mtypes[MT_FREE]--; \
(m)->m_type = (type); \
mbstat.m_mtypes[type]++; \
(m)->m_next = (struct mbuf *)NULL; \
(m)->m_nextpkt = (struct mbuf *)NULL; \
(m)->m_data = (m)->m_dat; \
(m)->m_flags = 0; \
splx(_ms); \
} else { \
splx(_ms); \
(m) = m_retry((how), (type)); \
} \
}
Definition: mbuf.h:103
◆ MGETHDR
| #define MGETHDR | ( | m, | |
| how, | |||
| type | |||
| ) |
Value:
{ \
int _ms = splimp(); \
if (mmbfree == 0) \
(void)m_mballoc(1, (how)); \
if (((m) = mmbfree) != 0) { \
mmbfree = (m)->m_next; \
mbstat.m_mtypes[MT_FREE]--; \
(m)->m_type = (type); \
mbstat.m_mtypes[type]++; \
(m)->m_next = (struct mbuf *)NULL; \
(m)->m_nextpkt = (struct mbuf *)NULL; \
(m)->m_data = (m)->m_pktdat; \
(m)->m_flags = M_PKTHDR; \
splx(_ms); \
} else { \
splx(_ms); \
(m) = m_retryhdr((how), (type)); \
} \
}
Definition: mbuf.h:103
◆ MH_ALIGN
| #define MH_ALIGN | ( | m, | |
| len | |||
| ) |
Value:
do { \
(m)->m_data += (MHLEN - (len)) & ~(sizeof(long) - 1); \
} while (0)
