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define helper routines for deferred mbuf initialization

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This commit is contained in:
Kip Macy 2009-06-19 21:14:39 +00:00
parent 57700c9e4d
commit 5b204a113c
2 changed files with 56 additions and 0 deletions
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26
sys/kern/kern_mbuf.c
View File

@ -645,6 +645,32 @@ mb_ctor_pack(void *mem, int size, void *arg, int how)
return (0);
}
int
m_pkthdr_init(struct mbuf *m, int how)
{
#ifdef MAC
int error;
#endif
m->m_data = m->m_pktdat;
SLIST_INIT(&m->m_pkthdr.tags);
m->m_pkthdr.rcvif = NULL;
m->m_pkthdr.header = NULL;
m->m_pkthdr.len = 0;
m->m_pkthdr.flowid = 0;
m->m_pkthdr.csum_flags = 0;
m->m_pkthdr.csum_data = 0;
m->m_pkthdr.tso_segsz = 0;
m->m_pkthdr.ether_vtag = 0;
#ifdef MAC
/* If the label init fails, fail the alloc */
error = mac_mbuf_init(m, how);
if (error)
return (error);
#endif
return (0);
}
/*
* This is the protocol drain routine.
*

30
sys/sys/mbuf.h
View File

@ -366,12 +366,15 @@ static __inline struct mbuf *m_gethdr(int how, short type);
static __inline struct mbuf *m_getjcl(int how, short type, int flags,
int size);
static __inline struct mbuf *m_getclr(int how, short type); /* XXX */
static __inline int m_init(struct mbuf *m, uma_zone_t zone,
int size, int how, short type, int flags);
static __inline struct mbuf *m_free(struct mbuf *m);
static __inline void m_clget(struct mbuf *m, int how);
static __inline void *m_cljget(struct mbuf *m, int how, int size);
static __inline void m_chtype(struct mbuf *m, short new_type);
void mb_free_ext(struct mbuf *);
static __inline struct mbuf *m_last(struct mbuf *m);
int m_pkthdr_init(struct mbuf *m, int how);
static __inline int
m_gettype(int size)
@ -433,6 +436,33 @@ m_getzone(int size)
return (zone);
}
/*
* Initialize an mbuf with linear storage.
*
* Inline because the consumer text overhead will be roughly the same to
* initialize or call a function with this many parameters and M_PKTHDR
* should go away with constant propagation for !MGETHDR.
*/
static __inline int
m_init(struct mbuf *m, uma_zone_t zone, int size, int how, short type,
int flags)
{
int error;
m->m_next = NULL;
m->m_nextpkt = NULL;
m->m_data = m->m_dat;
m->m_len = 0;
m->m_flags = flags;
m->m_type = type;
if (flags & M_PKTHDR) {
if ((error = m_pkthdr_init(m, how)) != 0)
return (error);
}
return (0);
}
static __inline struct mbuf *
m_get(int how, short type)
{