FreeBSD kernel kern code: kern/subr_uio.c File Reference

FreeBSD kernel kern code

#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/limits.h>
#include <sys/lock.h>
#include <sys/mman.h>
#include <sys/proc.h>
#include <sys/resourcevar.h>
#include <sys/rwlock.h>
#include <sys/sched.h>
#include <sys/sysctl.h>
#include <sys/vnode.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/vm_extern.h>
#include <vm/vm_page.h>
#include <vm/vm_pageout.h>
#include <vm/vm_map.h>
#include <machine/bus.h>

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Macros
#define	PHYS_PAGE_COUNT(len) (howmany(len, PAGE_SIZE) + 1)

Functions
	__FBSDID ("$FreeBSD$")

	SYSCTL_INT (_kern, KERN_IOV_MAX, iov_max, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, UIO_MAXIOV, "Maximum number of elements in an I/O vector; sysconf(_SC_IOV_MAX)")

static int	uiomove_faultflag (void cp, int n, struct uio uio, int nofault)

int	copyin_nofault (const void udaddr, void kaddr, size_t len)

int	copyout_nofault (const void kaddr, void udaddr, size_t len)

int	physcopyin (void *src, vm_paddr_t dst, size_t len)

int	physcopyout (vm_paddr_t src, void *dst, size_t len)

int	physcopyin_vlist (bus_dma_segment_t *src, off_t offset, vm_paddr_t dst, size_t len)

int	physcopyout_vlist (vm_paddr_t src, bus_dma_segment_t *dst, off_t offset, size_t len)

int	uiomove (void cp, int n, struct uio uio)

int	uiomove_nofault (void cp, int n, struct uio uio)

int	uiomove_frombuf (void buf, int buflen, struct uio uio)

int	ureadc (int c, struct uio *uio)

int	copyiniov (const struct iovec iovp, u_int iovcnt, struct iovec *iov, int error)

int	copyinuio (const struct iovec iovp, u_int iovcnt, struct uio *uiop)

struct uio *	cloneuio (struct uio *uiop)

int	copyout_map (struct thread td, vm_offset_t addr, size_t sz)

int	copyout_unmap (struct thread *td, vm_offset_t addr, size_t sz)

int32_t	fuword32 (volatile const void *addr)

long	fuword (volatile const void *addr)

uint32_t	casuword32 (volatile uint32_t *addr, uint32_t old, uint32_t new)

u_long	casuword (volatile u_long *addr, u_long old, u_long new)

Macro Definition Documentation

◆ PHYS_PAGE_COUNT

#define PHYS_PAGE_COUNT ( len ) (howmany(len, PAGE_SIZE) + 1)

Definition at line 96 of file subr_uio.c.

Function Documentation

◆ __FBSDID()

__FBSDID ( "$FreeBSD$" )

◆ casuword()

u_long casuword	(	volatile u_long *	addr,
		u_long	old,
		u_long	new
	)

Definition at line 507 of file subr_uio.c.

References addr.

◆ casuword32()

uint32_t casuword32	(	volatile uint32_t *	addr,
		uint32_t	old,
		uint32_t	new
	)

Definition at line 497 of file subr_uio.c.

References addr.

Referenced by do_lock_pi().

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◆ cloneuio()

struct uio * cloneuio ( struct uio * uiop )

Definition at line 401 of file subr_uio.c.

References malloc().

Referenced by dofileread(), dofilewrite(), kern_recvit(), kern_sendit(), log_console(), and vn_io_fault1().

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◆ copyin_nofault()

int copyin_nofault	(	const void *	udaddr,
		void *	kaddr,
		size_t	len
	)

Definition at line 75 of file subr_uio.c.

◆ copyiniov()

int copyiniov	(	const struct iovec *	iovp,
		u_int	iovcnt,
		struct iovec **	iov,
		int	error
	)

Definition at line 347 of file subr_uio.c.

References free(), and malloc().

Referenced by sys_recvmsg(), and sys_sendmsg().

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◆ copyinuio()

int copyinuio	(	const struct iovec *	iovp,
		u_int	iovcnt,
		struct uio **	uiop
	)

Definition at line 365 of file subr_uio.c.

References free(), and malloc().

Referenced by aiocb_copyin(), sendfile(), sys_jail_get(), sys_jail_set(), sys_nmount(), sys_preadv(), sys_pwritev(), sys_readv(), and sys_writev().

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◆ copyout_map()

int copyout_map	(	struct thread *	td,
		vm_offset_t *	addr,
		size_t	sz
	)

Definition at line 419 of file subr_uio.c.

References addr, and lim_max().

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◆ copyout_nofault()

int copyout_nofault	(	const void *	kaddr,
		void *	udaddr,
		size_t	len
	)

Definition at line 86 of file subr_uio.c.

Referenced by stats_v1_blob_clone(), and sysctl_old_user().

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◆ copyout_unmap()

int copyout_unmap	(	struct thread *	td,
		vm_offset_t	addr,
		size_t	sz
	)

Definition at line 447 of file subr_uio.c.

References addr.

◆ fuword()

long fuword ( volatile const void * addr )

Definition at line 487 of file subr_uio.c.

References addr.

Referenced by aiocb_fetch_error(), and aiocb_fetch_status().

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◆ fuword32()

int32_t fuword32 ( volatile const void * addr )

Definition at line 465 of file subr_uio.c.

References addr.

Referenced by do_sem2_wait().

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◆ physcopyin()

int physcopyin	(	void *	src,
		vm_paddr_t	dst,
		size_t	len
	)

Definition at line 99 of file subr_uio.c.

References PHYS_PAGE_COUNT, and src.

Referenced by physcopyin_vlist().

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◆ physcopyin_vlist()

int physcopyin_vlist	(	bus_dma_segment_t *	src,
		off_t	offset,
		vm_paddr_t	dst,
		size_t	len
	)

Definition at line 143 of file subr_uio.c.

References physcopyin(), and src.

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◆ physcopyout()

int physcopyout	(	vm_paddr_t	src,
		void *	dst,
		size_t	len
	)

Definition at line 120 of file subr_uio.c.

References PHYS_PAGE_COUNT, and src.

Referenced by physcopyout_vlist().

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◆ physcopyout_vlist()

int physcopyout_vlist	(	vm_paddr_t	src,
		bus_dma_segment_t *	dst,
		off_t	offset,
		size_t	len
	)

Definition at line 169 of file subr_uio.c.

References physcopyout(), and src.

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◆ SYSCTL_INT()

SYSCTL_INT	(	_kern	,
		KERN_IOV_MAX	,
		iov_max	,
		CTLFLAG_RD	,
		SYSCTL_NULL_INT_PTR	,
		UIO_MAXIOV	,
		"Maximum number of elements in an I/O vector; sysconf(_SC_IOV_MAX)"
	)

◆ uiomove()

int uiomove	(	void *	cp,
		int	n,
		struct uio *	uio
	)

Definition at line 195 of file subr_uio.c.

References uiomove_faultflag().

Referenced by devread(), eventfd_read(), eventfd_write(), log_console(), logread(), m_mbuftouio(), m_uiotombuf(), m_unmapped_uiomove(), pipe_read(), pipe_write(), ptsdev_write(), sbuf_uionew(), soreceive_dgram(), soreceive_generic(), soreceive_rcvoob(), ttydisc_getc_uio(), ttydisc_write(), ttyinq_read_uio(), ttyoutq_read_uio(), uiomove_frombuf(), uiomove_object_page(), vfs_read_dirent(), vn_io_fault1(), and vn_io_fault_uiomove().

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◆ uiomove_faultflag()

static int uiomove_faultflag	(	void *	cp,
		int	n,
		struct uio *	uio,
		int	nofault
	)

static

Definition at line 209 of file subr_uio.c.

References maybe_yield().

Referenced by uiomove(), and uiomove_nofault().

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◆ uiomove_frombuf()

int uiomove_frombuf	(	void *	buf,
		int	buflen,
		struct uio *	uio
	)

Definition at line 290 of file subr_uio.c.

References buf, and uiomove().

Referenced by mqfs_read().

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◆ uiomove_nofault()

int uiomove_nofault	(	void *	cp,
		int	n,
		struct uio *	uio
	)

Definition at line 202 of file subr_uio.c.

References uiomove_faultflag().

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◆ ureadc()

int ureadc	(	int	c,
		struct uio *	uio
	)

Definition at line 308 of file subr_uio.c.

References panic().

Referenced by ptsdev_read().

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kern
subr_uio.c
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