uipc_mbuf.c File Reference

#include <sys/cdefs.h>
#include "opt_param.h"
#include "opt_mbuf_stress_test.h"
#include "opt_mbuf_profiling.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/limits.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/sysctl.h>
#include <sys/domain.h>
#include <sys/protosw.h>
#include <sys/uio.h>

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Macros
#define	M_SANITY_ACTION(s)   printf("mbuf %p: " s, m)

Functions
	__FBSDID ("$BSDSUniX$")
	SYSCTL_INT (_kern_ipc, KIPC_MAX_LINKHDR, max_linkhdr, CTLFLAG_RD,&max_linkhdr, 0,"Size of largest link layer header")
	SYSCTL_INT (_kern_ipc, KIPC_MAX_PROTOHDR, max_protohdr, CTLFLAG_RD,&max_protohdr, 0,"Size of largest protocol layer header")
	SYSCTL_INT (_kern_ipc, KIPC_MAX_HDR, max_hdr, CTLFLAG_RD,&max_hdr, 0,"Size of largest link plus protocol header")
	SYSCTL_INT (_kern_ipc, KIPC_MAX_DATALEN, max_datalen, CTLFLAG_RD,&max_datalen, 0,"Minimum space left in mbuf after max_hdr")
struct mbuf *	m_getm2 (struct mbuf *m, int len, int how, short type, int flags)
void	m_freem (struct mbuf *mb)
void	m_extadd (struct mbuf *mb, caddr_t buf, u_int size, void(*freef)(void *, void *), void *arg1, void *arg2, int flags, int type)
void	mb_free_ext (struct mbuf *m)
static void	mb_dupcl (struct mbuf *n, struct mbuf *m)
void	m_demote (struct mbuf *m0, int all)
int	m_sanity (struct mbuf *m0, int sanitize)
void	m_move_pkthdr (struct mbuf *to, struct mbuf *from)
int	m_dup_pkthdr (struct mbuf *to, struct mbuf *from, int how)
struct mbuf *	m_prepend (struct mbuf *m, int len, int how)
struct mbuf *	m_copym (struct mbuf *m, int off0, int len, int wait)
static int	m_bcopyxxx (void *s, void *t, u_int len)
struct mbuf *	m_copymdata (struct mbuf *m, struct mbuf *n, int off, int len, int prep, int how)
struct mbuf *	m_copypacket (struct mbuf *m, int how)
void	m_copydata (const struct mbuf *m, int off, int len, caddr_t cp)
struct mbuf *	m_dup (struct mbuf *m, int how)
void	m_cat (struct mbuf *m, struct mbuf *n)
void	m_adj (struct mbuf *mp, int req_len)
struct mbuf *	m_pullup (struct mbuf *n, int len)
struct mbuf *	m_copyup (struct mbuf *n, int len, int dstoff)
struct mbuf *	m_split (struct mbuf *m0, int len0, int wait)
struct mbuf *	m_devget (char *buf, int totlen, int off, struct ifnet *ifp, void(*copy)(char *from, caddr_t to, u_int len))
void	m_copyback (struct mbuf *m0, int off, int len, c_caddr_t cp)
int	m_append (struct mbuf *m0, int len, c_caddr_t cp)
int	m_apply (struct mbuf *m, int off, int len, int(*f)(void *, void *, u_int), void *arg)
struct mbuf *	m_getptr (struct mbuf *m, int loc, int *off)
void	m_print (const struct mbuf *m, int maxlen)
u_int	m_fixhdr (struct mbuf *m0)
u_int	m_length (struct mbuf *m0, struct mbuf **last)
struct mbuf *	m_defrag (struct mbuf *m0, int how)
struct mbuf *	m_collapse (struct mbuf *m0, int how, int maxfrags)
struct mbuf *	m_uiotombuf (struct uio *uio, int how, int len, int align, int flags)
int	m_mbuftouio (struct uio *uio, struct mbuf *m, int len)
void	m_align (struct mbuf *m, int len)
struct mbuf *	m_unshare (struct mbuf *m0, int how)

Variables
int	max_linkhdr
int	max_protohdr
int	max_hdr
int	max_datalen
int	MSFail

Macro Definition Documentation

#define M_SANITY_ACTION

(

s

)

printf("mbuf %p: " s, m)

Referenced by m_sanity().

Function Documentation

__FBSDID

(

"$BSDSUniX$"

)

void m_adj	(	struct mbuf *	mp,
		int	req_len
	)

Definition at line 930 of file uipc_mbuf.c.

References count, and m_freem().

Referenced by m_pulldown().

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void m_align	(	struct mbuf *	m,
		int	len
	)

Definition at line 1813 of file uipc_mbuf.c.

int m_append	(	struct mbuf *	m0,
		int	len,
		c_caddr_t	cp
	)

Definition at line 1308 of file uipc_mbuf.c.

int m_apply	(	struct mbuf *	m,
		int	off,
		int	len,
		int(*)(void *, void *, u_int)	f,
		void *	arg
	)

Definition at line 1351 of file uipc_mbuf.c.

References count.

Referenced by m_copymdata().

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static int m_bcopyxxx ( void *  s, void *  t, u_int  len  )

static

Definition at line 606 of file uipc_mbuf.c.

Referenced by m_copymdata().

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void m_cat	(	struct mbuf *	m,
		struct mbuf *	n
	)

Definition at line 910 of file uipc_mbuf.c.

Referenced by m_defrag(), and soreceive_stream().

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struct mbuf* m_collapse	(	struct mbuf *	m0,
		int	how,
		int	maxfrags
	)

Definition at line 1565 of file uipc_mbuf.c.

void m_copyback	(	struct mbuf *	m0,
		int	off,
		int	len,
		c_caddr_t	cp
	)

Definition at line 1252 of file uipc_mbuf.c.

void m_copydata	(	const struct mbuf *	m,
		int	off,
		int	len,
		caddr_t	cp
	)

Definition at line 804 of file uipc_mbuf.c.

References count.

Referenced by m_defrag(), m_dup1(), and m_pulldown().

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struct mbuf* m_copym	(	struct mbuf *	m,
		int	off0,
		int	len,
		int	wait
	)

Definition at line 528 of file uipc_mbuf.c.

References m_dup_pkthdr(), m_freem(), mb_dupcl(), and mbstat.

Referenced by md_get_mbuf(), soreceive_generic(), and soreceive_stream().

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struct mbuf* m_copymdata	(	struct mbuf *	m,
		struct mbuf *	n,
		int	off,
		int	len,
		int	prep,
		int	how
	)

Definition at line 613 of file uipc_mbuf.c.

References m_apply(), m_bcopyxxx(), and m_move_pkthdr().

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struct mbuf* m_copypacket	(	struct mbuf *	m,
		int	how
	)

Definition at line 752 of file uipc_mbuf.c.

References m_dup_pkthdr(), m_freem(), mb_dupcl(), and mbstat.

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struct mbuf* m_copyup	(	struct mbuf *	n,
		int	len,
		int	dstoff
	)

Definition at line 1073 of file uipc_mbuf.c.

References count, m_freem(), and max_protohdr.

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struct mbuf* m_defrag	(	struct mbuf *	m0,
		int	how
	)

Definition at line 1482 of file uipc_mbuf.c.

References m_cat(), m_copydata(), m_dup_pkthdr(), m_fixhdr(), and m_freem().

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void m_demote	(	struct mbuf *	m0,
		int	all
	)

Definition at line 314 of file uipc_mbuf.c.

References m_freem(), and m_tag_delete_chain().

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struct mbuf* m_devget	(	char *	buf,
		int	totlen,
		int	off,
		struct ifnet *	ifp,
		void(*)(char *from, caddr_t to, u_int len)	copy
	)

Definition at line 1186 of file uipc_mbuf.c.

References m_freem(), and max_linkhdr.

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struct mbuf* m_dup	(	struct mbuf *	m,
		int	how
	)

Definition at line 834 of file uipc_mbuf.c.

References m_dup_pkthdr(), m_freem(), and mbstat.

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int m_dup_pkthdr	(	struct mbuf *	to,
		struct mbuf *	from,
		int	how
	)

Definition at line 459 of file uipc_mbuf.c.

References m_tag_copy_chain(), and m_tag_delete_chain().

Referenced by m_copym(), m_copypacket(), m_defrag(), m_dup(), and m_dup1().

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void m_extadd	(	struct mbuf *	mb,
		caddr_t	buf,
		u_int	size,
		void(*)(void *, void *)	freef,
		void *	arg1,
		void *	arg2,
		int	flags,
		int	type
	)

Definition at line 186 of file uipc_mbuf.c.

References buf, type, and zone_ext_refcnt.

u_int m_fixhdr

(

struct mbuf *

m0

)

Definition at line 1444 of file uipc_mbuf.c.

References m_length().

Referenced by m_defrag(), and mb_fixhdr().

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void m_freem

(

struct mbuf *

mb

)

Definition at line 157 of file uipc_mbuf.c.

Referenced by kern_recvit(), kern_sendfile(), m_adj(), m_copym(), m_copypacket(), m_copyup(), m_defrag(), m_demote(), m_devget(), m_dup(), m_getm2(), m_prepend(), m_pulldown(), m_pullup(), m_sanity(), m_uiotombuf(), m_unshare(), mb_done(), md_done(), soopt_getm(), soopt_mcopyin(), soopt_mcopyout(), soreceive_dgram(), soreceive_generic(), soreceive_rcvoob(), sosend_dgram(), sosend_generic(), uipc_send(), unp_externalize(), and unp_internalize().

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struct mbuf* m_getm2	(	struct mbuf *	m,
		int	len,
		int	how,
		short	type,
		int	flags
	)

Definition at line 95 of file uipc_mbuf.c.

References m_freem().

Referenced by m_uiotombuf().

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struct mbuf* m_getptr	(	struct mbuf *	m,
		int	loc,
		int *	off
	)

Definition at line 1383 of file uipc_mbuf.c.

u_int m_length	(	struct mbuf *	m0,
		struct mbuf **	last
	)

Definition at line 1454 of file uipc_mbuf.c.

Referenced by kern_sendfile(), m_fixhdr(), sbappendaddr_locked(), and sbappendcontrol_locked().

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int m_mbuftouio	(	struct uio *	uio,
		struct mbuf *	m,
		int	len
	)

Definition at line 1783 of file uipc_mbuf.c.

References uiomove().

Referenced by soreceive_stream().

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void m_move_pkthdr	(	struct mbuf *	to,
		struct mbuf *	from
	)

Definition at line 428 of file uipc_mbuf.c.

References m_tag_delete_chain().

Referenced by m_copymdata().

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struct mbuf* m_prepend	(	struct mbuf *	m,
		int	len,
		int	how
	)

Definition at line 493 of file uipc_mbuf.c.

References m_freem().

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void m_print	(	const struct mbuf *	m,
		int	maxlen
	)

Definition at line 1408 of file uipc_mbuf.c.

References printf().

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struct mbuf* m_pullup	(	struct mbuf *	n,
		int	len
	)

Definition at line 1011 of file uipc_mbuf.c.

References count, m_freem(), max_protohdr, and mbstat.

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int m_sanity	(	struct mbuf *	m0,
		int	sanitize
	)

Definition at line 342 of file uipc_mbuf.c.

References m_freem(), M_SANITY_ACTION, and m_tag_delete_chain().

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struct mbuf* m_split	(	struct mbuf *	m0,
		int	len0,
		int	wait
	)

Definition at line 1124 of file uipc_mbuf.c.

References mb_dupcl().

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struct mbuf* m_uiotombuf	(	struct uio *	uio,
		int	how,
		int	len,
		int	align,
		int	flags
	)

Definition at line 1727 of file uipc_mbuf.c.

References m_freem(), m_getm2(), and uiomove().

Referenced by kern_sendfile(), sosend_dgram(), and sosend_generic().

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struct mbuf* m_unshare	(	struct mbuf *	m0,
		int	how
	)

Definition at line 1836 of file uipc_mbuf.c.

References m_freem().

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static void mb_dupcl ( struct mbuf *  n, struct mbuf *  m  )

static

Definition at line 287 of file uipc_mbuf.c.

Referenced by m_copym(), m_copypacket(), and m_split().

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void mb_free_ext

(

struct mbuf *

m

)

Definition at line 211 of file uipc_mbuf.c.

References zone_clust, zone_ext_refcnt, zone_jumbo16, zone_jumbo9, zone_jumbop, zone_mbuf, and zone_pack.

SYSCTL_INT	(	_kern_ipc	,
		KIPC_MAX_LINKHDR	,
		max_linkhdr	,
		CTLFLAG_RD	,
		&	max_linkhdr,
		0	,
		"Size of largest link layer header"
	)

SYSCTL_INT	(	_kern_ipc	,
		KIPC_MAX_PROTOHDR	,
		max_protohdr	,
		CTLFLAG_RD	,
		&	max_protohdr,
		0	,
		"Size of largest protocol layer header"
	)

SYSCTL_INT	(	_kern_ipc	,
		KIPC_MAX_HDR	,
		max_hdr	,
		CTLFLAG_RD	,
		&	max_hdr,
		0	,
		"Size of largest link plus protocol header"
	)

SYSCTL_INT	(	_kern_ipc	,
		KIPC_MAX_DATALEN	,
		max_datalen	,
		CTLFLAG_RD	,
		&	max_datalen,
		0	,
		"Minimum space left in mbuf after max_hdr"
	)

Variable Documentation

int max_datalen

Definition at line 54 of file uipc_mbuf.c.

Referenced by domain_init().

int max_hdr

Definition at line 53 of file uipc_mbuf.c.

Referenced by domain_init(), sosend_dgram(), and sosend_generic().

int max_linkhdr

Definition at line 51 of file uipc_mbuf.c.

Referenced by domain_init(), domaininit(), and m_devget().

int max_protohdr

Definition at line 52 of file uipc_mbuf.c.

Referenced by domain_init(), m_copyup(), and m_pullup().

int MSFail

Definition at line 1070 of file uipc_mbuf.c.