#include <sys/cdefs.h>
#include "opt_kern_tls.h"
#include "opt_param.h"
#include <sys/param.h>
#include <sys/aio.h>
#include <sys/kernel.h>
#include <sys/ktls.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/protosw.h>
#include <sys/resourcevar.h>
#include <sys/signalvar.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sx.h>
#include <sys/sysctl.h>

Include dependency graph for uipc_sockbuf.c:

Macros
#define	SBLINKRECORD(sb, m0)

Functions
	__FBSDID ("$FreeBSD$")

static struct mbuf *	sbcut_internal (struct sockbuf *sb, int len)

static void	sbflush_internal (struct sockbuf *sb)

static void	sbm_clrprotoflags (struct mbuf *m, int flags)

static void	sbready_compress (struct sockbuf sb, struct mbuf m0, struct mbuf *end)

int	sbready (struct sockbuf sb, struct mbuf m0, int count)

void	sballoc (struct sockbuf sb, struct mbuf m)

void	sbfree (struct sockbuf sb, struct mbuf m)

void	socantsendmore_locked (struct socket *so)

void	socantsendmore (struct socket *so)

void	socantrcvmore_locked (struct socket *so)

void	socantrcvmore (struct socket *so)

void	soroverflow_locked (struct socket *so)

void	soroverflow (struct socket *so)

int	sbwait (struct sockbuf *sb)

void	sowakeup (struct socket so, struct sockbuf sb)

int	soreserve (struct socket *so, u_long sndcc, u_long rcvcc)

static int	sysctl_handle_sb_max (SYSCTL_HANDLER_ARGS)

int	sbreserve_locked (struct sockbuf sb, u_long cc, struct socket so, struct thread *td)

int	sbsetopt (struct socket *so, int cmd, u_long cc)

void	sbrelease_internal (struct sockbuf sb, struct socket so)

void	sbrelease_locked (struct sockbuf sb, struct socket so)

void	sbrelease (struct sockbuf sb, struct socket so)

void	sbdestroy (struct sockbuf sb, struct socket so)

void	sbappend_locked (struct sockbuf sb, struct mbuf m, int flags)

void	sbappend (struct sockbuf sb, struct mbuf m, int flags)

void	sbappendstream_locked (struct sockbuf sb, struct mbuf m, int flags)

void	sbappendstream (struct sockbuf sb, struct mbuf m, int flags)

void	sbappendrecord_locked (struct sockbuf sb, struct mbuf m0)

void	sbappendrecord (struct sockbuf sb, struct mbuf m0)

static int	sbappendaddr_locked_internal (struct sockbuf sb, const struct sockaddr asa, struct mbuf m0, struct mbuf control, struct mbuf *ctrl_last)

int	sbappendaddr_locked (struct sockbuf sb, const struct sockaddr asa, struct mbuf m0, struct mbuf control)

int	sbappendaddr_nospacecheck_locked (struct sockbuf sb, const struct sockaddr asa, struct mbuf m0, struct mbuf control)

int	sbappendaddr (struct sockbuf sb, const struct sockaddr asa, struct mbuf m0, struct mbuf control)

void	sbappendcontrol_locked (struct sockbuf sb, struct mbuf m0, struct mbuf *control, int flags)

void	sbappendcontrol (struct sockbuf sb, struct mbuf m0, struct mbuf *control, int flags)

void	sbcompress (struct sockbuf sb, struct mbuf m, struct mbuf *n)

void	sbflush_locked (struct sockbuf *sb)

void	sbflush (struct sockbuf *sb)

void	sbdrop_locked (struct sockbuf *sb, int len)

struct mbuf *	sbcut_locked (struct sockbuf *sb, int len)

void	sbdrop (struct sockbuf *sb, int len)

struct mbuf *	sbsndptr_noadv (struct sockbuf sb, uint32_t off, uint32_t moff)

void	sbsndptr_adv (struct sockbuf sb, struct mbuf mb, uint32_t len)

struct mbuf *	sbsndmbuf (struct sockbuf sb, u_int off, u_int moff)

void	sbdroprecord_locked (struct sockbuf *sb)

void	sbdroprecord (struct sockbuf *sb)

struct mbuf *	sbcreatecontrol_how (void *p, int size, int type, int level, int wait)

struct mbuf *	sbcreatecontrol (caddr_t p, int size, int type, int level)

void	sbtoxsockbuf (struct sockbuf sb, struct xsockbuf xsb)

	SYSCTL_INT (_kern, KERN_DUMMY, dummy, CTLFLAG_RW\|CTLFLAG_SKIP, &dummy, 0, "")

	SYSCTL_OID (_kern_ipc, KIPC_MAXSOCKBUF, maxsockbuf, CTLTYPE_ULONG\|CTLFLAG_RW\|CTLFLAG_MPSAFE, &sb_max, 0, sysctl_handle_sb_max, "LU", "Maximum socket buffer size")

	SYSCTL_ULONG (_kern_ipc, KIPC_SOCKBUF_WASTE, sockbuf_waste_factor, CTLFLAG_RW, &sb_efficiency, 0, "Socket buffer size waste factor")

Variables
void(*	aio_swake )(struct socket , struct sockbuf )

u_long	sb_max = SB_MAX

u_long	sb_max_adj

static u_long	sb_efficiency = 8

static int	dummy

Macro Definition Documentation

◆ SBLINKRECORD

#define SBLINKRECORD	(	sb,
		m0
	)

Value:

        do {                                    \
        SOCKBUF_LOCK_ASSERT(sb);                                        \
        if ((sb)->sb_lastrecord != NULL)                                \
                (sb)->sb_lastrecord->m_nextpkt = (m0);                  \
        else                                                            \
                (sb)->sb_mb = (m0);                                     \
        (sb)->sb_lastrecord = (m0);                                     \
} while (/*CONSTCOND*/0)

Definition at line 843 of file uipc_sockbuf.c.

Function Documentation

◆ __FBSDID()

__FBSDID ( "$FreeBSD$" )

◆ sballoc()

void sballoc	(	struct sockbuf *	sb,
		struct mbuf *	m
	)

Definition at line 265 of file uipc_sockbuf.c.

Referenced by sbappendaddr_locked_internal(), sbappendcontrol_locked(), sbappendrecord_locked(), and sbcompress().

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◆ sbappend()

void sbappend	(	struct sockbuf *	sb,
		struct mbuf *	m,
		int	flags
	)

Definition at line 909 of file uipc_sockbuf.c.

References flags, and sbappend_locked().

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◆ sbappend_locked()

void sbappend_locked	(	struct sockbuf *	sb,
		struct mbuf *	m,
		int	flags
	)

Definition at line 858 of file uipc_sockbuf.c.

References flags, sbappendrecord_locked(), sbcompress(), and sbm_clrprotoflags().

Referenced by sbappend(), and uipc_send().

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◆ sbappendaddr()

int sbappendaddr	(	struct sockbuf *	sb,
		const struct sockaddr *	asa,
		struct mbuf *	m0,
		struct mbuf *	control
	)

Definition at line 1230 of file uipc_sockbuf.c.

References sbappendaddr_locked().

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◆ sbappendaddr_locked()

int sbappendaddr_locked	(	struct sockbuf *	sb,
		const struct sockaddr *	asa,
		struct mbuf *	m0,
		struct mbuf *	control
	)

Definition at line 1186 of file uipc_sockbuf.c.

References m_length(), panic(), and sbappendaddr_locked_internal().

Referenced by sbappendaddr(), and uipc_send().

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◆ sbappendaddr_locked_internal()

static int sbappendaddr_locked_internal	(	struct sockbuf *	sb,
		const struct sockaddr *	asa,
		struct mbuf *	m0,
		struct mbuf *	control,
		struct mbuf *	ctrl_last
	)

static

Definition at line 1133 of file uipc_sockbuf.c.

References m_tag_delete_chain(), sballoc(), and SBLINKRECORD.

Referenced by sbappendaddr_locked(), and sbappendaddr_nospacecheck_locked().

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◆ sbappendaddr_nospacecheck_locked()

int sbappendaddr_nospacecheck_locked	(	struct sockbuf *	sb,
		const struct sockaddr *	asa,
		struct mbuf *	m0,
		struct mbuf *	control
	)

Definition at line 1212 of file uipc_sockbuf.c.

References sbappendaddr_locked_internal().

Referenced by uipc_send().

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◆ sbappendcontrol()

void sbappendcontrol	(	struct sockbuf *	sb,
		struct mbuf *	m0,
		struct mbuf *	control,
		int	flags
	)

Definition at line 1265 of file uipc_sockbuf.c.

References flags, and sbappendcontrol_locked().

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◆ sbappendcontrol_locked()

void sbappendcontrol_locked	(	struct sockbuf *	sb,
		struct mbuf *	m0,
		struct mbuf *	control,
		int	flags
	)

Definition at line 1242 of file uipc_sockbuf.c.

References flags, sballoc(), SBLINKRECORD, and sbm_clrprotoflags().

Referenced by ktls_decrypt(), sbappendcontrol(), and uipc_send().

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◆ sbappendrecord()

void sbappendrecord	(	struct sockbuf *	sb,
		struct mbuf *	m0
	)

Definition at line 1123 of file uipc_sockbuf.c.

References sbappendrecord_locked().

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◆ sbappendrecord_locked()

void sbappendrecord_locked	(	struct sockbuf *	sb,
		struct mbuf *	m0
	)

Definition at line 1092 of file uipc_sockbuf.c.

References sballoc(), sbcompress(), and SBLINKRECORD.

Referenced by sbappend_locked(), and sbappendrecord().

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◆ sbappendstream()

void sbappendstream	(	struct sockbuf *	sb,
		struct mbuf *	m,
		int	flags
	)

Definition at line 988 of file uipc_sockbuf.c.

References flags, and sbappendstream_locked().

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◆ sbappendstream_locked()

void sbappendstream_locked	(	struct sockbuf *	sb,
		struct mbuf *	m,
		int	flags
	)

Definition at line 946 of file uipc_sockbuf.c.

References flags, ktls_seq(), m_demote(), and sbcompress().

Referenced by sbappendstream().

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◆ sbcompress()

void sbcompress	(	struct sockbuf *	sb,
		struct mbuf *	m,
		struct mbuf *	n
	)

Definition at line 1295 of file uipc_sockbuf.c.

References m_copydata(), mb_unmapped_compress(), and sballoc().

Referenced by sbappend_locked(), sbappendrecord_locked(), and sbappendstream_locked().

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◆ sbcreatecontrol()

struct mbuf * sbcreatecontrol	(	caddr_t	p,
		int	size,
		int	type,
		int	level
	)

Definition at line 1756 of file uipc_sockbuf.c.

References level, sbcreatecontrol_how(), and type.

Referenced by unp_addsockcred(), unp_externalize(), and unp_internalize().

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◆ sbcreatecontrol_how()

struct mbuf * sbcreatecontrol_how	(	void *	p,
		int	size,
		int	type,
		int	level,
		int	wait
	)

Definition at line 1723 of file uipc_sockbuf.c.

References level, and type.

Referenced by ktls_decrypt(), and sbcreatecontrol().

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◆ sbcut_internal()

static struct mbuf * sbcut_internal	(	struct sockbuf *	sb,
		int	len
	)

static

Definition at line 1456 of file uipc_sockbuf.c.

References sbfree().

Referenced by sbcut_locked(), sbdrop(), sbdrop_locked(), and sbflush_internal().

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◆ sbcut_locked()

struct mbuf * sbcut_locked	(	struct sockbuf *	sb,
		int	len
	)

Definition at line 1584 of file uipc_sockbuf.c.

References sbcut_internal().

Referenced by soreceive_generic().

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◆ sbdestroy()

void sbdestroy	(	struct sockbuf *	sb,
		struct socket *	so
	)

Definition at line 742 of file uipc_sockbuf.c.

References sbrelease_internal().

Referenced by sofree(), and solisten_proto().

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◆ sbdrop()

void sbdrop	(	struct sockbuf *	sb,
		int	len
	)

Definition at line 1592 of file uipc_sockbuf.c.

References m_freem(), and sbcut_internal().

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◆ sbdrop_locked()

void sbdrop_locked	(	struct sockbuf *	sb,
		int	len
	)

Definition at line 1572 of file uipc_sockbuf.c.

References m_freem(), and sbcut_internal().

Referenced by soisdisconnected(), and soreceive_stream().

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◆ sbdroprecord()

void sbdroprecord ( struct sockbuf * sb )

Definition at line 1710 of file uipc_sockbuf.c.

References sbdroprecord_locked().

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◆ sbdroprecord_locked()

void sbdroprecord_locked ( struct sockbuf * sb )

Definition at line 1688 of file uipc_sockbuf.c.

References sbfree().

Referenced by sbdroprecord(), and soreceive_generic().

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◆ sbflush()

void sbflush ( struct sockbuf * sb )

Definition at line 1444 of file uipc_sockbuf.c.

References sbflush_locked().

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◆ sbflush_internal()

static void sbflush_internal ( struct sockbuf * sb )

static

Definition at line 1418 of file uipc_sockbuf.c.

References m_freem(), and sbcut_internal().

Referenced by sbflush_locked(), and sbrelease_internal().

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◆ sbflush_locked()

void sbflush_locked ( struct sockbuf * sb )

Definition at line 1436 of file uipc_sockbuf.c.

References sbflush_internal().

Referenced by sbflush().

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◆ sbfree()

void sbfree	(	struct sockbuf *	sb,
		struct mbuf *	m
	)

Definition at line 296 of file uipc_sockbuf.c.

Referenced by sbcut_internal(), sbdroprecord_locked(), soreceive_dgram(), soreceive_generic(), and soreceive_stream().

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◆ sbm_clrprotoflags()

static void sbm_clrprotoflags	(	struct mbuf *	m,
		int	flags
	)

static

Definition at line 84 of file uipc_sockbuf.c.

References flags, and mask.

Referenced by sbappend_locked(), and sbappendcontrol_locked().

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◆ sbready()

int sbready	(	struct sockbuf *	sb,
		struct mbuf *	m0,
		int	count
	)

Definition at line 200 of file uipc_sockbuf.c.

References count, and sbready_compress().

Referenced by uipc_ready(), and uipc_ready_scan().

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◆ sbready_compress()

static void sbready_compress	(	struct sockbuf *	sb,
		struct mbuf *	m0,
		struct mbuf *	end
	)

static

Definition at line 107 of file uipc_sockbuf.c.

References m_copydata(), and mb_unmapped_compress().

Referenced by sbready().

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◆ sbrelease()

void sbrelease	(	struct sockbuf *	sb,
		struct socket *	so
	)

Definition at line 733 of file uipc_sockbuf.c.

References sbrelease_locked().

Referenced by uipc_detach().

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◆ sbrelease_internal()

void sbrelease_internal	(	struct sockbuf *	sb,
		struct socket *	so
	)

Definition at line 714 of file uipc_sockbuf.c.

References chgsbsize(), and sbflush_internal().

Referenced by sbdestroy(), sbrelease_locked(), and sorflush().

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◆ sbrelease_locked()

void sbrelease_locked	(	struct sockbuf *	sb,
		struct socket *	so
	)

Definition at line 724 of file uipc_sockbuf.c.

References sbrelease_internal().

Referenced by sbrelease(), and soreserve().

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◆ sbreserve_locked()

int sbreserve_locked	(	struct sockbuf *	sb,
		u_long	cc,
		struct socket *	so,
		struct thread *	td
	)

Definition at line 604 of file uipc_sockbuf.c.

References chgsbsize(), lim_cur(), sb_efficiency, sb_max, and sb_max_adj.

Referenced by sbsetopt(), and soreserve().

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◆ sbsetopt()

int sbsetopt	(	struct socket *	so,
		int	cmd,
		u_long	cc
	)

Definition at line 634 of file uipc_sockbuf.c.

References flags, sb_max_adj, and sbreserve_locked().

Referenced by sosetopt().

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◆ sbsndmbuf()

struct mbuf * sbsndmbuf	(	struct sockbuf *	sb,
		u_int	off,
		u_int *	moff
	)

Definition at line 1657 of file uipc_sockbuf.c.

◆ sbsndptr_adv()

void sbsndptr_adv	(	struct sockbuf *	sb,
		struct mbuf *	mb,
		uint32_t	len
	)

Definition at line 1625 of file uipc_sockbuf.c.

◆ sbsndptr_noadv()

struct mbuf * sbsndptr_noadv	(	struct sockbuf *	sb,
		uint32_t	off,
		uint32_t *	moff
	)

Definition at line 1604 of file uipc_sockbuf.c.

◆ sbtoxsockbuf()

void sbtoxsockbuf	(	struct sockbuf *	sb,
		struct xsockbuf *	xsb
	)

Definition at line 1770 of file uipc_sockbuf.c.

Referenced by sotoxsocket().

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◆ sbwait()

int sbwait ( struct sockbuf * sb )

Definition at line 467 of file uipc_sockbuf.c.

Referenced by soreceive_dgram(), soreceive_generic(), soreceive_stream(), sosend_generic(), and vn_sendfile().

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◆ socantrcvmore()

void socantrcvmore ( struct socket * so )

Definition at line 431 of file uipc_sockbuf.c.

References socantrcvmore_locked().

Referenced by sorflush(), and unp_shutdown().

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◆ socantrcvmore_locked()

void socantrcvmore_locked ( struct socket * so )

Definition at line 416 of file uipc_sockbuf.c.

References ktls_check_rx().

Referenced by socantrcvmore(), soisdisconnected(), and soisdisconnecting().

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◆ socantsendmore()

void socantsendmore ( struct socket * so )

Definition at line 407 of file uipc_sockbuf.c.

References socantsendmore_locked().

Referenced by uipc_send(), and uipc_shutdown().

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◆ socantsendmore_locked()

void socantsendmore_locked ( struct socket * so )

Definition at line 396 of file uipc_sockbuf.c.

Referenced by socantsendmore(), soisdisconnected(), and soisdisconnecting().

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◆ soreserve()

int soreserve	(	struct socket *	so,
		u_long	sndcc,
		u_long	rcvcc
	)

Definition at line 556 of file uipc_sockbuf.c.

References sbrelease_locked(), and sbreserve_locked().

Referenced by sonewconn(), and uipc_attach().

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◆ soroverflow()

void soroverflow ( struct socket * so )

Definition at line 455 of file uipc_sockbuf.c.

References soroverflow_locked().

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◆ soroverflow_locked()

void soroverflow_locked ( struct socket * so )

Definition at line 440 of file uipc_sockbuf.c.

Referenced by soroverflow(), and uipc_send().

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◆ sowakeup()

void sowakeup	(	struct socket *	so,
		struct sockbuf *	sb
	)

Definition at line 491 of file uipc_sockbuf.c.

References pgsigio(), selwakeuppri(), soisconnected(), soupcall_clear(), sowakeup_aio(), and wakeup().

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◆ sysctl_handle_sb_max()

static int sysctl_handle_sb_max ( SYSCTL_HANDLER_ARGS )

static

Definition at line 584 of file uipc_sockbuf.c.

References sb_max, sb_max_adj, and sysctl_handle_long().

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◆ SYSCTL_INT()

SYSCTL_INT	(	_kern	,
		KERN_DUMMY	,
		dummy	,
		CTLFLAG_RW\|	CTLFLAG_SKIP,
		&	dummy,
		0	,
		""
	)

◆ SYSCTL_OID()

SYSCTL_OID	(	_kern_ipc	,
		KIPC_MAXSOCKBUF	,
		maxsockbuf	,
		CTLTYPE_ULONG\|CTLFLAG_RW\|	CTLFLAG_MPSAFE,
		&	sb_max,
		0	,
		sysctl_handle_sb_max	,
		"LU"	,
		"Maximum socket buffer size"
	)

◆ SYSCTL_ULONG()

SYSCTL_ULONG	(	_kern_ipc	,
		KIPC_SOCKBUF_WASTE	,
		sockbuf_waste_factor	,
		CTLFLAG_RW	,
		&	sb_efficiency,
		0	,
		"Socket buffer size waste factor"
	)

Variable Documentation

◆ aio_swake

void(* aio_swake) (struct socket , struct sockbuf )	(	struct socket *	,
		struct sockbuf *
	)

Definition at line 61 of file uipc_sockbuf.c.

◆ dummy

int dummy

static

Definition at line 1785 of file uipc_sockbuf.c.

◆ sb_efficiency

u_long sb_efficiency = 8

static

Definition at line 71 of file uipc_sockbuf.c.

Referenced by sbreserve_locked().

◆ sb_max

u_long sb_max = SB_MAX

Definition at line 67 of file uipc_sockbuf.c.

Referenced by sbreserve_locked(), and sysctl_handle_sb_max().

◆ sb_max_adj

u_long sb_max_adj

Initial value:

=

(quad_t)SB_MAX * MCLBYTES / (MSIZE + MCLBYTES)

Definition at line 68 of file uipc_sockbuf.c.

Referenced by sbreserve_locked(), sbsetopt(), and sysctl_handle_sb_max().

Macros

Functions

Variables

Macro Definition Documentation

◆ SBLINKRECORD

Function Documentation

◆ __FBSDID()

◆ sballoc()

◆ sbappend()

◆ sbappend_locked()

◆ sbappendaddr()

◆ sbappendaddr_locked()

◆ sbappendaddr_locked_internal()

◆ sbappendaddr_nospacecheck_locked()

◆ sbappendcontrol()

◆ sbappendcontrol_locked()

◆ sbappendrecord()

◆ sbappendrecord_locked()

◆ sbappendstream()

◆ sbappendstream_locked()

◆ sbcompress()

◆ sbcreatecontrol()

◆ sbcreatecontrol_how()

◆ sbcut_internal()

◆ sbcut_locked()

◆ sbdestroy()

◆ sbdrop()

◆ sbdrop_locked()

◆ sbdroprecord()

◆ sbdroprecord_locked()

◆ sbflush()

◆ sbflush_internal()

◆ sbflush_locked()

◆ sbfree()

◆ sbm_clrprotoflags()

◆ sbready()

◆ sbready_compress()

◆ sbrelease()

◆ sbrelease_internal()

◆ sbrelease_locked()

◆ sbreserve_locked()

◆ sbsetopt()

◆ sbsndmbuf()

◆ sbsndptr_adv()

◆ sbsndptr_noadv()

◆ sbtoxsockbuf()

◆ sbwait()

◆ socantrcvmore()

◆ socantrcvmore_locked()

◆ socantsendmore()

◆ socantsendmore_locked()

◆ soreserve()

◆ soroverflow()

◆ soroverflow_locked()

◆ sowakeup()

◆ sysctl_handle_sb_max()

◆ SYSCTL_INT()

◆ SYSCTL_OID()

◆ SYSCTL_ULONG()

Variable Documentation

◆ aio_swake

◆ dummy

◆ sb_efficiency

◆ sb_max

◆ sb_max_adj