null.c (74810) | null.c (93496) |
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1/*- 2 * Copyright (c) 2000 Mark R. V. Murray & Jeroen C. van Gelderen 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 9 unchanged lines hidden (view full) --- 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * | 1/*- 2 * Copyright (c) 2000 Mark R. V. Murray & Jeroen C. van Gelderen 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 9 unchanged lines hidden (view full) --- 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * |
26 * $FreeBSD: head/sys/dev/null/null.c 74810 2001-03-26 12:41:29Z phk $ | 26 * $FreeBSD: head/sys/dev/null/null.c 93496 2002-03-31 22:37:00Z phk $ |
27 */ 28 29#include <sys/param.h> 30#include <sys/systm.h> 31#include <sys/conf.h> 32#include <sys/uio.h> 33#include <sys/kernel.h> 34#include <sys/malloc.h> 35#include <sys/module.h> | 27 */ 28 29#include <sys/param.h> 30#include <sys/systm.h> 31#include <sys/conf.h> 32#include <sys/uio.h> 33#include <sys/kernel.h> 34#include <sys/malloc.h> 35#include <sys/module.h> |
36#include <sys/disklabel.h> |
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36#include <sys/bus.h> 37#include <machine/bus.h> 38#include <machine/resource.h> 39#include <sys/rman.h> 40 41/* For use with destroy_dev(9). */ 42static dev_t null_dev; 43static dev_t zero_dev; 44 45static d_write_t null_write; | 37#include <sys/bus.h> 38#include <machine/bus.h> 39#include <machine/resource.h> 40#include <sys/rman.h> 41 42/* For use with destroy_dev(9). */ 43static dev_t null_dev; 44static dev_t zero_dev; 45 46static d_write_t null_write; |
47static d_ioctl_t null_ioctl; |
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46static d_read_t zero_read; 47 48#define CDEV_MAJOR 2 49#define NULL_MINOR 2 50#define ZERO_MINOR 12 51 52static struct cdevsw null_cdevsw = { 53 /* open */ (d_open_t *)nullop, 54 /* close */ (d_close_t *)nullop, 55 /* read */ (d_read_t *)nullop, 56 /* write */ null_write, | 48static d_read_t zero_read; 49 50#define CDEV_MAJOR 2 51#define NULL_MINOR 2 52#define ZERO_MINOR 12 53 54static struct cdevsw null_cdevsw = { 55 /* open */ (d_open_t *)nullop, 56 /* close */ (d_close_t *)nullop, 57 /* read */ (d_read_t *)nullop, 58 /* write */ null_write, |
57 /* ioctl */ noioctl, | 59 /* ioctl */ null_ioctl, |
58 /* poll */ nopoll, 59 /* mmap */ nommap, 60 /* strategy */ nostrategy, 61 /* name */ "null", 62 /* maj */ CDEV_MAJOR, 63 /* dump */ nodump, 64 /* psize */ nopsize, 65 /* flags */ 0, --- 20 unchanged lines hidden (view full) --- 86static int 87null_write(dev_t dev, struct uio *uio, int flag) 88{ 89 uio->uio_resid = 0; 90 return 0; 91} 92 93static int | 60 /* poll */ nopoll, 61 /* mmap */ nommap, 62 /* strategy */ nostrategy, 63 /* name */ "null", 64 /* maj */ CDEV_MAJOR, 65 /* dump */ nodump, 66 /* psize */ nopsize, 67 /* flags */ 0, --- 20 unchanged lines hidden (view full) --- 88static int 89null_write(dev_t dev, struct uio *uio, int flag) 90{ 91 uio->uio_resid = 0; 92 return 0; 93} 94 95static int |
96null_ioctl(dev_t dev, u_long cmd, caddr_t data, int fflag, struct thread *td) 97{ 98 int error; 99 100 if (cmd != DIOCGKERNELDUMP) 101 return (noioctl(dev, cmd, data, fflag, td)); 102 error = suser_td(td); 103 if (error) 104 return (error); 105 return (set_dumper(NULL)); 106} 107 108 109static int |
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94zero_read(dev_t dev, struct uio *uio, int flag) 95{ 96 u_int c; 97 int error = 0; 98 99 while (uio->uio_resid > 0 && error == 0) { 100 c = min(uio->uio_resid, PAGE_SIZE); 101 error = uiomove(zbuf, c, uio); --- 33 unchanged lines hidden --- | 110zero_read(dev_t dev, struct uio *uio, int flag) 111{ 112 u_int c; 113 int error = 0; 114 115 while (uio->uio_resid > 0 && error == 0) { 116 c = min(uio->uio_resid, PAGE_SIZE); 117 error = uiomove(zbuf, c, uio); --- 33 unchanged lines hidden --- |