#include <sys/cdefs.h>
#include "opt_capsicum.h"
#include "opt_compat.h"
#include "opt_ktrace.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/sysproto.h>
#include <sys/capability.h>
#include <sys/filedesc.h>
#include <sys/filio.h>
#include <sys/fcntl.h>
#include <sys/file.h>
#include <sys/proc.h>
#include <sys/signalvar.h>
#include <sys/socketvar.h>
#include <sys/uio.h>
#include <sys/kernel.h>
#include <sys/ktr.h>
#include <sys/limits.h>
#include <sys/malloc.h>
#include <sys/poll.h>
#include <sys/resourcevar.h>
#include <sys/selinfo.h>
#include <sys/sleepqueue.h>
#include <sys/syscallsubr.h>
#include <sys/sysctl.h>
#include <sys/sysent.h>
#include <sys/vnode.h>
#include <sys/bio.h>
#include <sys/buf.h>
#include <sys/condvar.h>
#include <security/audit/audit.h>

Include dependency graph for sys_generic.c:

Data Structures
struct	seltd

struct	selfd

struct	read_args

struct	pread_args

struct	readv_args

struct	preadv_args

struct	write_args

struct	pwrite_args

struct	writev_args

struct	pwritev_args

struct	ftruncate_args

struct	ioctl_args

struct	select_args

struct	poll_args

struct	openbsd_poll_args

Macros
#define	SYS_IOCTL_SMALL_SIZE 128 /* bytes */

#define	SYS_IOCTL_SMALL_ALIGN 8 /* bytes */

#define	SELTD_PENDING 0x0001 /* We have pending events. */

#define	SELTD_RESCAN 0x0002 /* Doing a rescan. */

#define	getbits(name, x)

#define	swizzle_fdset(bits)

#define	putbits(name, x)

Functions
	__FBSDID ("$BSDSUniX$")

	SYSCTL_INT (_debug, OID_AUTO, iosize_max_clamp, CTLFLAG_RW,&iosize_max_clamp, 0,"Clamp max i/o size to INT_MAX")

	SYSCTL_INT (_debug, OID_AUTO, devfs_iosize_max_clamp, CTLFLAG_RW,&devfs_iosize_max_clamp, 0,"Clamp max i/o size to INT_MAX for devices")

	CTASSERT (sizeof(register_t) >=sizeof(size_t))

static	MALLOC_DEFINE (M_IOCTLOPS,"ioctlops","ioctl data buffer")

static	MALLOC_DEFINE (M_SELECT,"select","select() buffer")

	MALLOC_DEFINE (M_IOV,"iov","large iov's")

static int	pollout (struct thread , struct pollfd , struct pollfd *, u_int)

static int	pollscan (struct thread , struct pollfd , u_int)

static int	pollrescan (struct thread *)

static int	selscan (struct thread , fd_mask , fd_mask *, int)

static int	selrescan (struct thread , fd_mask , fd_mask *)

static void	selfdalloc (struct thread , void )

static void	selfdfree (struct seltd , struct selfd )

static int	dofileread (struct thread , int, struct file , struct uio *, off_t, int)

static int	dofilewrite (struct thread , int, struct file , struct uio *, off_t, int)

static void	doselwakeup (struct selinfo *, int)

static void	seltdinit (struct thread *)

static int	seltdwait (struct thread *, int)

static void	seltdclear (struct thread *)

int	sys_read (struct thread td, struct read_args uap)

int	sys_pread (struct thread td, struct pread_args uap)

int	freebsd6_pread (struct thread td, struct freebsd6_pread_args uap)

int	sys_readv (struct thread td, struct readv_args uap)

int	kern_readv (struct thread td, int fd, struct uio auio)

int	sys_preadv (struct thread td, struct preadv_args uap)

int	kern_preadv (struct thread td, int fd, struct uio auio, off_t offset)

int	sys_write (struct thread td, struct write_args uap)

int	sys_pwrite (struct thread td, struct pwrite_args uap)

int	freebsd6_pwrite (struct thread td, struct freebsd6_pwrite_args uap)

int	sys_writev (struct thread td, struct writev_args uap)

int	kern_writev (struct thread td, int fd, struct uio auio)

int	sys_pwritev (struct thread td, struct pwritev_args uap)

int	kern_pwritev (struct thread td, int fd, struct uio auio, off_t offset)

int	kern_ftruncate (struct thread *td, int fd, off_t length)

int	sys_ftruncate (struct thread td, struct ftruncate_args uap)

int	sys_ioctl (struct thread td, struct ioctl_args uap)

int	kern_ioctl (struct thread *td, int fd, u_long com, caddr_t data)

int	poll_no_poll (int events)

int	sys_pselect (struct thread td, struct pselect_args uap)

int	kern_pselect (struct thread td, int nd, fd_set in, fd_set ou, fd_set ex, struct timeval tvp, sigset_t uset, int abi_nfdbits)

int	sys_select (struct thread td, struct select_args uap)

static int	select_check_badfd (fd_set *fd_in, int nd, int ndu, int abi_nfdbits)

int	kern_select (struct thread td, int nd, fd_set fd_in, fd_set fd_ou, fd_set fd_ex, struct timeval *tvp, int abi_nfdbits)

static __inline int	selflags (fd_mask **ibits, int idx, fd_mask bit)

static __inline int	selsetbits (fd_mask ibits, fd_mask obits, int idx, fd_mask bit, int events)

static __inline int	getselfd_cap (struct filedesc fdp, int fd, struct file *fpp)

int	sys_poll (struct thread td, struct poll_args uap)

int	sys_openbsd_poll (struct thread td, struct openbsd_poll_args uap)

int	selsocket (struct socket so, int events, struct timeval tvp, struct thread *td)

void	seldrain (struct selinfo *sip)

void	selrecord (struct thread selector, struct selinfo sip)

void	selwakeup (struct selinfo *sip)

void	selwakeuppri (struct selinfo *sip, int pri)

void	seltdfini (struct thread *td)

static void	selectinit (void *)

	SYSINIT (select, SI_SUB_SYSCALLS, SI_ORDER_ANY, selectinit, NULL)

static void	selectinit (void *dummy __unused)

Variables
int	iosize_max_clamp = 1

int	devfs_iosize_max_clamp = 1

static uma_zone_t	selfd_zone

static struct mtx_pool *	mtxpool_select

static int	select_flags [3]

Macro Definition Documentation

#define getbits	(	name,
		x
	)

Value:

do {                                                            \
                if (name == NULL) {                                     \
                        ibits[x] = NULL;                                \
                        obits[x] = NULL;                                \
                } else {                                                \
                        ibits[x] = sbp + nbufbytes / 2 / sizeof *sbp;   \
                        obits[x] = sbp;                                 \
                        sbp += ncpbytes / sizeof *sbp;                  \
                        error = copyin(name, ibits[x], ncpubytes);      \
                        if (error != 0)                                 \
                                goto done;                              \
                        bzero((char *)ibits[x] + ncpubytes,             \
                            ncpbytes - ncpubytes);                      \
                }                                                       \
        } while (0)

Referenced by kern_select().

#define putbits	(	name,
		x
	)

Value:

if (name && (error2 = copyout(obits[x], name, ncpubytes))) \

error = error2;

name

const char * name

Definition: kern_fail.c:97

Referenced by kern_select().

#define SELTD_PENDING 0x0001 /* We have pending events. */

Definition at line 141 of file sys_generic.c.

Referenced by doselwakeup(), and seltdwait().

#define SELTD_RESCAN 0x0002 /* Doing a rescan. */

Definition at line 142 of file sys_generic.c.

Referenced by selrecord(), and seltdwait().

#define swizzle_fdset ( bits )

Referenced by kern_select().

#define SYS_IOCTL_SMALL_ALIGN 8 /* bytes */

Definition at line 89 of file sys_generic.c.

Referenced by sys_ioctl().

#define SYS_IOCTL_SMALL_SIZE 128 /* bytes */

Definition at line 88 of file sys_generic.c.

Referenced by sys_ioctl().

Function Documentation

__FBSDID ( "$BSDSUniX$" )

CTASSERT ( sizeof(register_t) >=sizeof(size_t) )

static int dofileread	(	struct thread *	td,
		int	fd,
		struct file *	fp,
		struct uio *	auio,
		off_t	offset,
		int	flags
	)

static

Definition at line 326 of file sys_generic.c.

References cloneuio().

Referenced by kern_preadv(), and kern_readv().

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static int dofilewrite	(	struct thread *	td,
		int	fd,
		struct file *	fp,
		struct uio *	auio,
		off_t	offset,
		int	flags
	)

static

Definition at line 535 of file sys_generic.c.

References bwillwrite(), cloneuio(), and tdsignal().

Referenced by kern_pwritev(), and kern_writev().

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static void doselwakeup	(	struct selinfo *	sip,
		int	pri
	)

static

Definition at line 1675 of file sys_generic.c.

References cv_broadcastpri(), and SELTD_PENDING.

Referenced by seldrain(), selwakeup(), and selwakeuppri().

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int freebsd6_pread	(	struct thread *	td,
		struct freebsd6_pread_args *	uap
	)

Definition at line 222 of file sys_generic.c.

References pread_args::buf, pread_args::fd, pread_args::nbyte, pread_args::offset, and sys_pread().

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int freebsd6_pwrite	(	struct thread *	td,
		struct freebsd6_pwrite_args *	uap
	)

Definition at line 431 of file sys_generic.c.

References pwrite_args::buf, pwrite_args::fd, pwrite_args::nbyte, pwrite_args::offset, and sys_pwrite().

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static __inline int getselfd_cap	(	struct filedesc *	fdp,
		int	fd,
		struct file **	fpp
	)

static

Definition at line 1152 of file sys_generic.c.

References cap_funwrap(), and fget_unlocked().

Referenced by selrescan(), and selscan().

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int kern_ftruncate	(	struct thread *	td,
		int	fd,
		off_t	length
	)

Definition at line 589 of file sys_generic.c.

References fget().

Referenced by sys_ftruncate().

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int kern_ioctl	(	struct thread *	td,
		int	fd,
		u_long	com,
		caddr_t	data
	)

Definition at line 724 of file sys_generic.c.

References fd, and fget().

Referenced by parse_dir_md(), and sys_ioctl().

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int kern_preadv	(	struct thread *	td,
		int	fd,
		struct uio *	auio,
		off_t	offset
	)

Definition at line 299 of file sys_generic.c.

References dofileread(), and fget_read().

Referenced by sys_pread(), and sys_preadv().

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int kern_pselect	(	struct thread *	td,
		int	nd,
		fd_set *	in,
		fd_set *	ou,
		fd_set *	ex,
		struct timeval *	tvp,
		sigset_t *	uset,
		int	abi_nfdbits
	)

Definition at line 817 of file sys_generic.c.

References kern_select(), and kern_sigprocmask().

Referenced by sys_pselect().

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int kern_pwritev	(	struct thread *	td,
		int	fd,
		struct uio *	auio,
		off_t	offset
	)

Definition at line 508 of file sys_generic.c.

References dofilewrite(), and fget_write().

Referenced by sys_pwrite(), and sys_pwritev().

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int kern_readv	(	struct thread *	td,
		int	fd,
		struct uio *	auio
	)

Definition at line 260 of file sys_generic.c.

References dofileread(), and fget_read().

Referenced by sys_read(), and sys_readv().

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int kern_select	(	struct thread *	td,
		int	nd,
		fd_set *	fd_in,
		fd_set *	fd_ou,
		fd_set *	fd_ex,
		struct timeval *	tvp,
		int	abi_nfdbits
	)

Definition at line 915 of file sys_generic.c.

References free(), getbits, getmicrouptime(), hz, itimerfix(), malloc(), putbits, select_check_badfd(), selrescan(), selscan(), seltdclear(), seltdinit(), seltdwait(), swizzle_fdset, timevaladd(), timevalsub(), and tvtohz().

Referenced by kern_pselect(), and sys_select().

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int kern_writev	(	struct thread *	td,
		int	fd,
		struct uio *	auio
	)

Definition at line 469 of file sys_generic.c.

References dofilewrite(), and fget_write().

Referenced by kern_sendfile(), sys_write(), and sys_writev().

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static MALLOC_DEFINE	(	M_IOCTLOPS	,
		"ioctlops"	,
		"ioctl data buffer"
	)

static

static MALLOC_DEFINE	(	M_SELECT	,
		"select"	,
		"select() buffer"
	)

static

MALLOC_DEFINE	(	M_IOV	,
		"iov"	,
		"large iov's"
	)

int poll_no_poll ( int events )

Definition at line 774 of file sys_generic.c.

Referenced by no_poll(), and vop_nopoll().

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static int pollout	(	struct thread *	td,
		struct pollfd *	fds,
		struct pollfd *	ufds,
		u_int	nfd
	)

static

Definition at line 1401 of file sys_generic.c.

Referenced by sys_poll().

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static int pollrescan ( struct thread * td )

static

Definition at line 1351 of file sys_generic.c.

References cap_funwrap(), fd, and selfdfree().

Referenced by sys_poll().

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static int pollscan	(	struct thread *	td,
		struct pollfd *	fds,
		u_int	nfd
	)

static

Definition at line 1426 of file sys_generic.c.

References cap_funwrap(), and selfdalloc().

Referenced by sys_poll().

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void seldrain ( struct selinfo * sip )

Definition at line 1587 of file sys_generic.c.

References doselwakeup().

Referenced by destroy_vpollinfo(), kqueue_close(), mqueue_free(), pipeclose(), ptsdrv_free(), sofree(), and tty_dealloc().

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static int select_check_badfd	(	fd_set *	fd_in,
		int	nd,
		int	ndu,
		int	abi_nfdbits
	)

static

Definition at line 876 of file sys_generic.c.

Referenced by kern_select().

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static void selectinit ( void * )

static

static void selectinit ( void *dummy __unused )

static

Definition at line 1786 of file sys_generic.c.

References mtx_pool_create().

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static void selfdalloc	(	struct thread *	td,
		void *	cookie
	)

static

Definition at line 1559 of file sys_generic.c.

Referenced by pollscan(), selscan(), and selsocket().

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static void selfdfree	(	struct seltd *	stp,
		struct selfd *	sfp
	)

static

Definition at line 1575 of file sys_generic.c.

Referenced by pollrescan(), selrescan(), and seltdclear().

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static __inline int selflags	(	fd_mask **	ibits,
		int	idx,
		fd_mask	bit
	)

static

Definition at line 1102 of file sys_generic.c.

Referenced by selrescan(), and selscan().

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void selrecord	(	struct thread *	selector,
		struct selinfo *	sip
	)

Definition at line 1606 of file sys_generic.c.

References mtx_pool_find(), panic(), and SELTD_RESCAN.

Referenced by devpoll(), kqueue_poll(), logpoll(), mqf_poll(), pipe_poll(), ptsdev_poll(), sopoll_generic(), ttydev_poll(), and vn_pollrecord().

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static int selrescan	(	struct thread *	td,
		fd_mask **	ibits,
		fd_mask **	obits
	)

static

Definition at line 1187 of file sys_generic.c.

References fd, getselfd_cap(), selfdfree(), selflags(), and selsetbits().

Referenced by kern_select().

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static int selscan	(	struct thread *	td,
		fd_mask **	ibits,
		fd_mask **	obits,
		int	nfd
	)

static

Definition at line 1229 of file sys_generic.c.

References fd, getselfd_cap(), selfdalloc(), selflags(), and selsetbits().

Referenced by kern_select().

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static __inline int selsetbits	(	fd_mask **	ibits,
		fd_mask **	obits,
		int	idx,
		fd_mask	bit,
		int	events
	)

static

Definition at line 1123 of file sys_generic.c.

Referenced by selrescan(), and selscan().

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int selsocket	(	struct socket *	so,
		int	events,
		struct timeval *	tvp,
		struct thread *	td
	)

Definition at line 1505 of file sys_generic.c.

References getmicrouptime(), hz, itimerfix(), selfdalloc(), seltdclear(), seltdinit(), seltdwait(), sopoll(), timevaladd(), timevalsub(), and tvtohz().

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static void seltdclear ( struct thread * td )

static

Definition at line 1771 of file sys_generic.c.

References selfdfree().

Referenced by kern_select(), selsocket(), and sys_poll().

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void seltdfini ( struct thread * td )

Definition at line 1751 of file sys_generic.c.

References free().

Referenced by thread_fini().

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static void seltdinit ( struct thread * td )

static

Definition at line 1707 of file sys_generic.c.

References cv_init(), malloc(), and mtx_init().

Referenced by kern_select(), selsocket(), and sys_poll().

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static int seltdwait	(	struct thread *	td,
		int	timo
	)

static

Definition at line 1722 of file sys_generic.c.

References SELTD_PENDING, and SELTD_RESCAN.

Referenced by kern_select(), selsocket(), and sys_poll().

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void selwakeup ( struct selinfo * sip )

Definition at line 1656 of file sys_generic.c.

References doselwakeup().

Referenced by _mqueue_recv(), _mqueue_send(), devctl_queue_data_f(), mqueue_fdclose(), ptsdrv_inwakeup(), ptsdrv_outwakeup(), and tty_wakeup().

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void selwakeuppri	(	struct selinfo *	sip,
		int	pri
	)

Definition at line 1664 of file sys_generic.c.

References doselwakeup().

Referenced by kqueue_close(), kqueue_wakeup(), logtimeout(), pipeselwakeup(), sohasoutofband(), and sowakeup().

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int sys_ftruncate	(	struct thread *	td,
		struct ftruncate_args *	uap
	)

Definition at line 621 of file sys_generic.c.

References ftruncate_args::fd, kern_ftruncate(), and ftruncate_args::length.

Referenced by freebsd6_ftruncate().

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int sys_ioctl	(	struct thread *	td,
		struct ioctl_args *	uap
	)

Definition at line 655 of file sys_generic.c.

References __aligned(), ioctl_args::com, ioctl_args::data, ioctl_args::fd, free(), kern_ioctl(), malloc(), printf(), SYS_IOCTL_SMALL_ALIGN, and SYS_IOCTL_SMALL_SIZE.

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int sys_openbsd_poll	(	struct thread *	td,
		struct openbsd_poll_args *	uap
	)

Definition at line 1491 of file sys_generic.c.

References sys_poll().

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int sys_poll	(	struct thread *	td,
		struct poll_args *	uap
	)

Definition at line 1273 of file sys_generic.c.

References poll_args::fds, free(), getmicrouptime(), hz, itimerfix(), malloc(), maxfilesperproc, poll_args::nfds, pollout(), pollrescan(), pollscan(), seltdclear(), seltdinit(), seltdwait(), poll_args::timeout, timevaladd(), timevalsub(), and tvtohz().

Referenced by sys_openbsd_poll().

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int sys_pread	(	struct thread *	td,
		struct pread_args *	uap
	)

Definition at line 201 of file sys_generic.c.

References pread_args::buf, pread_args::fd, kern_preadv(), pread_args::nbyte, and pread_args::offset.

Referenced by freebsd6_pread().

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int sys_preadv	(	struct thread *	td,
		struct preadv_args *	uap
	)

Definition at line 285 of file sys_generic.c.

References copyinuio(), preadv_args::fd, free(), preadv_args::iovcnt, preadv_args::iovp, kern_preadv(), and preadv_args::offset.

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int sys_pselect	(	struct thread *	td,
		struct pselect_args *	uap
	)

Definition at line 790 of file sys_generic.c.

References kern_pselect(), and set.

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int sys_pwrite	(	struct thread *	td,
		struct pwrite_args *	uap
	)

Definition at line 410 of file sys_generic.c.

References pwrite_args::buf, pwrite_args::fd, kern_pwritev(), pwrite_args::nbyte, and pwrite_args::offset.

Referenced by freebsd6_pwrite().

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int sys_pwritev	(	struct thread *	td,
		struct pwritev_args *	uap
	)

Definition at line 494 of file sys_generic.c.

References copyinuio(), pwritev_args::fd, free(), pwritev_args::iovcnt, pwritev_args::iovp, kern_pwritev(), and pwritev_args::offset.

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int sys_read	(	struct thread *	td,
		struct read_args *	uap
	)

Definition at line 168 of file sys_generic.c.

References read_args::buf, read_args::fd, kern_readv(), and read_args::nbyte.

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int sys_readv	(	struct thread *	td,
		struct readv_args *	uap
	)

Definition at line 246 of file sys_generic.c.

References copyinuio(), readv_args::fd, free(), readv_args::iovcnt, readv_args::iovp, and kern_readv().

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int sys_select	(	struct thread *	td,
		struct select_args *	uap
	)

Definition at line 849 of file sys_generic.c.

References select_args::ex, select_args::in, kern_select(), select_args::nd, select_args::ou, and select_args::tv.

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int sys_write	(	struct thread *	td,
		struct write_args *	uap
	)

Definition at line 377 of file sys_generic.c.

References write_args::buf, write_args::fd, kern_writev(), and write_args::nbyte.

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int sys_writev	(	struct thread *	td,
		struct writev_args *	uap
	)

Definition at line 455 of file sys_generic.c.

References copyinuio(), writev_args::fd, free(), writev_args::iovcnt, writev_args::iovp, and kern_writev().

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SYSCTL_INT	(	_debug	,
		OID_AUTO	,
		iosize_max_clamp	,
		CTLFLAG_RW	,
		&	iosize_max_clamp,
		0	,
		"Clamp max i/o size to INT_MAX"
	)

SYSCTL_INT	(	_debug	,
		OID_AUTO	,
		devfs_iosize_max_clamp	,
		CTLFLAG_RW	,
		&	devfs_iosize_max_clamp,
		0	,
		"Clamp max i/o size to INT_MAX for devices"
	)

SYSINIT	(	select	,
		SI_SUB_SYSCALLS	,
		SI_ORDER_ANY	,
		selectinit	,
		NULL
	)

Variable Documentation

int devfs_iosize_max_clamp = 1

Definition at line 94 of file sys_generic.c.

int iosize_max_clamp = 1

Definition at line 91 of file sys_generic.c.

struct mtx_pool* mtxpool_select

static

Definition at line 158 of file sys_generic.c.

int select_flags[3]

static

Initial value:

= {
    POLLRDNORM | POLLHUP | POLLERR,
    POLLWRNORM | POLLHUP | POLLERR,
    POLLRDBAND | POLLERR
}

Definition at line 1091 of file sys_generic.c.

uma_zone_t selfd_zone

static

Definition at line 157 of file sys_generic.c.

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