/*
- * Copyright (c) 1997-2006 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 1997-2020 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
+ *
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
- *
+ *
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
- *
+ *
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
- *
+ *
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* HISTORY
*
* 30 July 1997 Umesh Vaishampayan (umeshv@apple.com)
- * enabled file descriptor pseudo-device.
+ * enabled file descriptor pseudo-device.
* 18 June 1993 ? at NeXT
* Cleaned up a lot of stuff in this file.
*/
#include <sys/conf.h>
/* Prototypes that should be elsewhere: */
-extern int isdisk(dev_t dev, int type);
-extern dev_t chrtoblk(dev_t dev);
-extern int chrtoblk_set(int cdev, int bdev);
-extern int iskmemdev(dev_t dev);
+extern dev_t chrtoblk(dev_t dev);
+extern int chrtoblk_set(int cdev, int bdev);
-struct bdevsw bdevsw[] =
+struct bdevsw bdevsw[] =
{
/*
- * For block devices, every other block of 8 slots is
+ * For block devices, every other block of 8 slots is
* reserved for Apple. The other slots are available for
* the user. This way we can both add new entries without
* running into each other. Be sure to fill in Apple's
/* 0 - 7 are reserved for Apple */
- NO_BDEVICE, /* 0*/
- NO_BDEVICE, /* 1*/
- NO_BDEVICE, /* 2*/
- NO_BDEVICE, /* 3*/
- NO_BDEVICE, /* 4*/
- NO_BDEVICE, /* 5*/
- NO_BDEVICE, /* 6*/
- NO_BDEVICE, /* 7*/
+ NO_BDEVICE, /* 0*/
+ NO_BDEVICE, /* 1*/
+ NO_BDEVICE, /* 2*/
+ NO_BDEVICE, /* 3*/
+ NO_BDEVICE, /* 4*/
+ NO_BDEVICE, /* 5*/
+ NO_BDEVICE, /* 6*/
+ NO_BDEVICE, /* 7*/
/* 8 - 15 are reserved to the user */
- NO_BDEVICE, /* 8*/
- NO_BDEVICE, /* 9*/
- NO_BDEVICE, /*10*/
- NO_BDEVICE, /*11*/
- NO_BDEVICE, /*12*/
- NO_BDEVICE, /*13*/
- NO_BDEVICE, /*14*/
- NO_BDEVICE, /*15*/
+ NO_BDEVICE, /* 8*/
+ NO_BDEVICE, /* 9*/
+ NO_BDEVICE, /*10*/
+ NO_BDEVICE, /*11*/
+ NO_BDEVICE, /*12*/
+ NO_BDEVICE, /*13*/
+ NO_BDEVICE, /*14*/
+ NO_BDEVICE, /*15*/
/* 16 - 23 are reserved for Apple */
- NO_BDEVICE, /*16*/
- NO_BDEVICE, /*17*/
- NO_BDEVICE, /*18*/
- NO_BDEVICE, /*18*/
- NO_BDEVICE, /*20*/
- NO_BDEVICE, /*21*/
- NO_BDEVICE, /*22*/
- NO_BDEVICE, /*23*/
+ NO_BDEVICE, /*16*/
+ NO_BDEVICE, /*17*/
+ NO_BDEVICE, /*18*/
+ NO_BDEVICE, /*18*/
+ NO_BDEVICE, /*20*/
+ NO_BDEVICE, /*21*/
+ NO_BDEVICE, /*22*/
+ NO_BDEVICE, /*23*/
};
-int nblkdev = sizeof (bdevsw) / sizeof (bdevsw[0]);
+const int nblkdev = sizeof(bdevsw) / sizeof(bdevsw[0]);
extern struct tty *km_tty[];
-extern d_open_t cnopen;
-extern d_close_t cnclose;
-extern d_read_t cnread;
-extern d_write_t cnwrite;
-extern d_ioctl_t cnioctl;
-extern d_select_t cnselect;
-extern d_getc_t cngetc;
-extern d_putc_t cnputc;
-extern d_open_t kmopen;
-extern d_close_t kmclose;
-extern d_read_t kmread;
-extern d_write_t kmwrite;
-extern d_ioctl_t kmioctl;
-extern d_getc_t kmgetc;
-extern d_putc_t kmputc;
-extern d_open_t sgopen;
-extern d_close_t sgclose;
-extern d_ioctl_t sgioctl;
+extern d_open_t cnopen;
+extern d_close_t cnclose;
+extern d_read_t cnread;
+extern d_write_t cnwrite;
+extern d_ioctl_t cnioctl;
+extern d_select_t cnselect;
+extern d_open_t kmopen;
+extern d_close_t kmclose;
+extern d_read_t kmread;
+extern d_write_t kmwrite;
+extern d_ioctl_t kmioctl;
+extern d_open_t sgopen;
+extern d_close_t sgclose;
+extern d_ioctl_t sgioctl;
#if NVOL > 0
-extern d_open_t volopen;
-extern d_close_t volclose;
-extern d_ioctl_t volioctl;
+extern d_open_t volopen;
+extern d_close_t volclose;
+extern d_ioctl_t volioctl;
#else
-#define volopen eno_opcl
-#define volclose eno_opcl
-#define volioctl eno_ioctl
+#define volopen eno_opcl
+#define volclose eno_opcl
+#define volioctl eno_ioctl
#endif
-extern d_open_t cttyopen;
-extern d_read_t cttyread;
-extern d_write_t cttywrite;
-extern d_ioctl_t cttyioctl;
-extern d_select_t cttyselect;
+extern d_open_t cttyopen;
+extern d_read_t cttyread;
+extern d_write_t cttywrite;
+extern d_ioctl_t cttyioctl;
+extern d_select_t cttyselect;
-extern d_read_t mmread;
-extern d_write_t mmwrite;
-extern d_ioctl_t mmioctl;
-#define mmselect (select_fcn_t *)seltrue
-#define mmmmap eno_mmap
+extern d_read_t mmread;
+extern d_write_t mmwrite;
+extern d_ioctl_t mmioctl;
+#define mmselect (select_fcn_t *)seltrue
+#define mmmmap eno_mmap
#include <pty.h>
#if NPTY > 0
-extern struct tty *pt_tty[];
-extern d_open_t ptsopen;
-extern d_close_t ptsclose;
-extern d_read_t ptsread;
-extern d_write_t ptswrite;
-extern d_stop_t ptsstop;
-extern d_putc_t ptsputc;
-extern d_open_t ptcopen;
-extern d_close_t ptcclose;
-extern d_read_t ptcread;
-extern d_write_t ptcwrite;
-extern d_select_t ptcselect;
-extern d_ioctl_t ptyioctl;
+extern d_open_t ptsopen;
+extern d_close_t ptsclose;
+extern d_read_t ptsread;
+extern d_write_t ptswrite;
+extern d_stop_t ptsstop;
+extern d_select_t ptsselect;
+extern d_open_t ptcopen;
+extern d_close_t ptcclose;
+extern d_read_t ptcread;
+extern d_write_t ptcwrite;
+extern d_select_t ptcselect;
+extern d_ioctl_t ptyioctl;
#else
-#define ptsopen eno_opcl
-#define ptsclose eno_opcl
-#define ptsread eno_rdwrt
-#define ptswrite eno_rdwrt
-#define ptsstop nulldev
-#define ptsputc nulldev
+#define ptsopen eno_opcl
+#define ptsclose eno_opcl
+#define ptsread eno_rdwrt
+#define ptswrite eno_rdwrt
+#define ptsstop nulldev
-#define ptcopen eno_opcl
-#define ptcclose eno_opcl
-#define ptcread eno_rdwrt
-#define ptcwrite eno_rdwrt
-#define ptcselect eno_select
-#define ptyioctl eno_ioctl
+#define ptcopen eno_opcl
+#define ptcclose eno_opcl
+#define ptcread eno_rdwrt
+#define ptcwrite eno_rdwrt
+#define ptcselect eno_select
+#define ptyioctl eno_ioctl
#endif
-extern d_open_t logopen;
-extern d_close_t logclose;
-extern d_read_t logread;
-extern d_ioctl_t logioctl;
-extern d_select_t logselect;
-extern d_open_t fdesc_open;
-extern d_read_t fdesc_read;
-extern d_write_t fdesc_write;
-extern d_ioctl_t fdesc_ioctl;
-extern d_select_t fdesc_select;
+extern d_open_t logopen;
+extern d_close_t logclose;
+extern d_read_t logread;
+extern d_ioctl_t logioctl;
+extern d_select_t logselect;
-#define nullopen (d_open_t *)&nulldev
-#define nullclose (d_close_t *)&nulldev
-#define nullread (d_read_t *)&nulldev
-#define nullwrite (d_write_t *)&nulldev
-#define nullioctl (d_ioctl_t *)&nulldev
-#define nullselect (d_select_t *)&nulldev
-#define nullstop (d_stop_t *)&nulldev
-#define nullreset (d_reset_t *)&nulldev
-
-struct cdevsw cdevsw[] =
-{
- /*
- * For character devices, every other block of 16 slots is
- * reserved for Apple. The other slots are available for
- * the user. This way we can both add new entries without
- * running into each other. Be sure to fill in Apple's
- * 16 reserved slots when you jump over us -- we'll do the
- * same for you.
- */
+extern d_open_t oslog_streamopen;
+extern d_close_t oslog_streamclose;
+extern d_read_t oslog_streamread;
+extern d_ioctl_t oslog_streamioctl;
+extern d_select_t oslog_streamselect;
- /* 0 - 15 are reserved for Apple */
+extern d_open_t oslogopen;
+extern d_close_t oslogclose;
+extern d_select_t oslogselect;
+extern d_ioctl_t oslogioctl;
- {
- cnopen, cnclose, cnread, cnwrite, /* 0*/
- cnioctl, nullstop, nullreset, 0, cnselect,
- eno_mmap, eno_strat, cngetc, cnputc, D_TTY
- },
- NO_CDEVICE, /* 1*/
- {
- cttyopen, nullclose, cttyread, cttywrite, /* 2*/
- cttyioctl, nullstop, nullreset, 0, cttyselect,
- eno_mmap, eno_strat, eno_getc, eno_putc, D_TTY
- },
- {
- nullopen, nullclose, mmread, mmwrite, /* 3*/
- mmioctl, nullstop, nullreset, 0, mmselect,
- mmmmap, eno_strat, eno_getc, eno_putc, D_DISK
- },
- {
- ptsopen, ptsclose, ptsread, ptswrite, /* 4*/
- ptyioctl, ptsstop, nullreset, pt_tty, ttselect,
- eno_mmap, eno_strat, eno_getc, eno_putc, D_TTY
- },
- {
- ptcopen, ptcclose, ptcread, ptcwrite, /* 5*/
- ptyioctl, nullstop, nullreset, 0, ptcselect,
- eno_mmap, eno_strat, eno_getc, eno_putc, D_TTY
- },
- {
- logopen, logclose, logread, eno_rdwrt, /* 6*/
- logioctl, eno_stop, nullreset, 0, logselect,
- eno_mmap, eno_strat, eno_getc, eno_putc, 0
- },
- NO_CDEVICE, /* 7*/
- NO_CDEVICE, /* 8*/
- NO_CDEVICE, /* 9*/
- NO_CDEVICE, /*10*/
- NO_CDEVICE, /*11*/
- {
- kmopen, kmclose, kmread, kmwrite, /*12*/
- kmioctl, nullstop, nullreset, km_tty, ttselect,
- eno_mmap, eno_strat, kmgetc, kmputc, 0
- },
- NO_CDEVICE, /*13*/
- NO_CDEVICE, /*14*/
- NO_CDEVICE, /*15*/
+#define nullopen (d_open_t *)&nulldev
+#define nullclose (d_close_t *)&nulldev
+#define nullread (d_read_t *)&nulldev
+#define nullwrite (d_write_t *)&nulldev
+#define nullioctl (d_ioctl_t *)&nulldev
+#define nullselect (d_select_t *)&nulldev
+#define nullstop (d_stop_t *)&nulldev
+#define nullreset (d_reset_t *)&nulldev
- /* 16 - 31 are reserved to the user */
- NO_CDEVICE, /*16*/
- NO_CDEVICE, /*17*/
- NO_CDEVICE, /*18*/
- NO_CDEVICE, /*19*/
- NO_CDEVICE, /*20*/
- NO_CDEVICE, /*21*/
- NO_CDEVICE, /*22*/
- NO_CDEVICE, /*23*/
- NO_CDEVICE, /*24*/
- NO_CDEVICE, /*25*/
- NO_CDEVICE, /*26*/
- NO_CDEVICE, /*27*/
- NO_CDEVICE, /*28*/
- NO_CDEVICE, /*29*/
- NO_CDEVICE, /*30*/
- NO_CDEVICE, /*31*/
+struct cdevsw cdevsw[] = {
+ /*
+ * To add character devices to this table dynamically, use cdevsw_add.
+ */
- /* 32 - 47 are reserved to NeXT */
- {
- fdesc_open, eno_opcl, fdesc_read, fdesc_write, /*32*/
- fdesc_ioctl, eno_stop, eno_reset, 0, fdesc_select,
- eno_mmap, eno_strat, eno_getc, eno_putc, 0
- },
-#if 1
- NO_CDEVICE,
-#else
- {
- sgopen, sgclose, eno_rdwrt, eno_rdwrt, /*33*/
- sgioctl, eno_stop, eno_reset, 0, eno_select,
- eno_mmap, eno_strat, eno_getc, eno_putc, D_TAPE
- },
-#endif
- NO_CDEVICE, /*34*/
- NO_CDEVICE, /*35*/
- NO_CDEVICE, /*36*/
- NO_CDEVICE, /*37*/
- NO_CDEVICE, /*38*/
- NO_CDEVICE, /*39*/
- NO_CDEVICE, /*40*/
- NO_CDEVICE, /*41*/
- {
- volopen, volclose, eno_rdwrt, eno_rdwrt, /*42*/
- volioctl, eno_stop, eno_reset, 0, (select_fcn_t *)seltrue,
- eno_mmap, eno_strat, eno_getc, eno_putc, 0
- },
+ [0] = {
+ cnopen, cnclose, cnread, cnwrite,
+ cnioctl, nullstop, nullreset, 0, cnselect,
+ eno_mmap, eno_strat, eno_getc, eno_putc, D_TTY
+ },
+ [1] = NO_CDEVICE,
+ [2] = {
+ cttyopen, nullclose, cttyread, cttywrite,
+ cttyioctl, nullstop, nullreset, 0, cttyselect,
+ eno_mmap, eno_strat, eno_getc, eno_putc, D_TTY
+ },
+ [3] = {
+ nullopen, nullclose, mmread, mmwrite,
+ mmioctl, nullstop, nullreset, 0, mmselect,
+ mmmmap, eno_strat, eno_getc, eno_putc, D_DISK
+ },
+ [PTC_MAJOR] = {
+ ptsopen, ptsclose, ptsread, ptswrite,
+ ptyioctl, ptsstop, nullreset, 0, ptsselect,
+ eno_mmap, eno_strat, eno_getc, eno_putc, D_TTY
+ },
+ [PTS_MAJOR] = {
+ ptcopen, ptcclose, ptcread, ptcwrite,
+ ptyioctl, nullstop, nullreset, 0, ptcselect,
+ eno_mmap, eno_strat, eno_getc, eno_putc, D_TTY
+ },
+ [6] = {
+ logopen, logclose, logread, eno_rdwrt,
+ logioctl, eno_stop, nullreset, 0, logselect,
+ eno_mmap, eno_strat, eno_getc, eno_putc, 0
+ },
+ [7] = {
+ oslogopen, oslogclose, eno_rdwrt, eno_rdwrt,
+ oslogioctl, eno_stop, nullreset, 0, oslogselect,
+ eno_mmap, eno_strat, eno_getc, eno_putc, 0
+ },
+ [8] = {
+ oslog_streamopen, oslog_streamclose, oslog_streamread, eno_rdwrt,
+ oslog_streamioctl, eno_stop, nullreset, 0, oslog_streamselect,
+ eno_mmap, eno_strat, eno_getc, eno_putc, 0
+ },
+ [9 ... 11] = NO_CDEVICE,
+ [12] = {
+ kmopen, kmclose, kmread, kmwrite,
+ kmioctl, nullstop, nullreset, km_tty, ttselect,
+ eno_mmap, eno_strat, eno_getc, eno_putc, 0
+ },
+ [13 ... 63] = NO_CDEVICE,
};
-int nchrdev = sizeof (cdevsw) / sizeof (cdevsw[0]);
+const int nchrdev = sizeof(cdevsw) / sizeof(cdevsw[0]);
+uint64_t cdevsw_flags[sizeof(cdevsw) / sizeof(cdevsw[0])];
-#include <sys/vnode.h> /* for VCHR and VBLK */
+#include <sys/vnode.h> /* for VCHR and VBLK */
/*
* return true if a disk
*/
int
isdisk(dev_t dev, int type)
{
- dev_t maj = major(dev);
+ dev_t maj = major(dev);
switch (type) {
case VCHR:
- maj = chrtoblk(maj);
+ maj = chrtoblk(dev);
if (maj == NODEV) {
break;
}
- /* FALL THROUGH */
+ OS_FALLTHROUGH;
case VBLK:
if (bdevsw[maj].d_type == D_DISK) {
- return (1);
+ return 1;
}
break;
}
- return(0);
+ return 0;
}
-static int chrtoblktab[] = {
- /* CHR*/ /* BLK*/ /* CHR*/ /* BLK*/
- /* 0 */ NODEV, /* 1 */ NODEV,
- /* 2 */ NODEV, /* 3 */ NODEV,
- /* 4 */ NODEV, /* 5 */ NODEV,
- /* 6 */ NODEV, /* 7 */ NODEV,
- /* 8 */ NODEV, /* 9 */ NODEV,
- /* 10 */ NODEV, /* 11 */ NODEV,
- /* 12 */ NODEV, /* 13 */ NODEV,
- /* 14 */ 6, /* 15 */ NODEV,
- /* 16 */ NODEV, /* 17 */ NODEV,
- /* 18 */ NODEV, /* 19 */ NODEV,
- /* 20 */ NODEV, /* 21 */ NODEV,
- /* 22 */ NODEV, /* 23 */ NODEV,
- /* 24 */ NODEV, /* 25 */ NODEV,
- /* 26 */ NODEV, /* 27 */ NODEV,
- /* 28 */ NODEV, /* 29 */ NODEV,
- /* 30 */ NODEV, /* 31 */ NODEV,
- /* 32 */ NODEV, /* 33 */ NODEV,
- /* 34 */ NODEV, /* 35 */ NODEV,
- /* 36 */ NODEV, /* 37 */ NODEV,
- /* 38 */ NODEV, /* 39 */ NODEV,
- /* 40 */ NODEV, /* 41 */ 1,
- /* 42 */ NODEV, /* 43 */ NODEV,
- /* 44 */ NODEV,
-};
+static int chrtoblktab[] = {[0 ... nchrdev] = NODEV };
/*
* convert chr dev to blk dev
{
int blkmaj;
- if (major(dev) >= nchrdev)
- return(NODEV);
+ if (major(dev) >= nchrdev) {
+ return NODEV;
+ }
blkmaj = chrtoblktab[major(dev)];
- if (blkmaj == NODEV)
- return(NODEV);
- return(makedev(blkmaj, minor(dev)));
+ if (blkmaj == NODEV) {
+ return NODEV;
+ }
+ return makedev(blkmaj, minor(dev));
}
int
chrtoblk_set(int cdev, int bdev)
{
- if (cdev >= nchrdev)
- return (-1);
- if (bdev != NODEV && bdev >= nblkdev)
- return (-1);
+ if (cdev >= nchrdev) {
+ return -1;
+ }
+ if (bdev != NODEV && bdev >= nblkdev) {
+ return -1;
+ }
chrtoblktab[cdev] = bdev;
return 0;
}
-
-/*
- * Returns true if dev is /dev/mem or /dev/kmem.
- */
-int iskmemdev(dev_t dev)
-{
- return (major(dev) == 3 && minor(dev) < 2);
-}
projects / apple / xnu.git / blobdiff