From 4507f02e0ea22f2cc59d673f11d2a95fedef2127 Mon Sep 17 00:00:00 2001 From: "Bjoern A. Zeeb" Date: Sat, 26 Sep 2009 12:45:28 +0000 Subject: [PATCH] lindev(4) [1] is supposed to be a collection of linux-specific pseudo devices that we also support, just not by default (thus only LINT or module builds by default). While currently there is only "/dev/full" [2], we are planning to see more in the future. We may decide to change the module/dependency logic in the future should the list grow too long. This is not part of linux.ko as also non-linux binaries like kFreeBSD userland or ports can make use of this as well. Suggested by: rwatson [1] (name) Submitted by: ed [2] Discussed with: markm, ed, rwatson, kib (weeks ago) Reviewed by: rwatson, brueffer (prev. version) PR: kern/68961 MFC after: 6 weeks --- share/man/man4/Makefile | 4 ++ share/man/man4/lindev.4 | 73 +++++++++++++++++++++++++ sys/amd64/conf/NOTES | 3 ++ sys/boot/forth/loader.conf | 1 + sys/conf/files.amd64 | 2 + sys/conf/files.i386 | 2 + sys/conf/files.pc98 | 2 + sys/dev/lindev/full.c | 103 ++++++++++++++++++++++++++++++++++++ sys/dev/lindev/lindev.c | 73 +++++++++++++++++++++++++ sys/dev/lindev/lindev.h | 34 ++++++++++++ sys/i386/conf/NOTES | 3 ++ sys/modules/Makefile | 3 ++ sys/modules/lindev/Makefile | 8 +++ sys/pc98/conf/NOTES | 3 ++ 14 files changed, 314 insertions(+) create mode 100644 share/man/man4/lindev.4 create mode 100644 sys/dev/lindev/full.c create mode 100644 sys/dev/lindev/lindev.c create mode 100644 sys/dev/lindev/lindev.h create mode 100644 sys/modules/lindev/Makefile diff --git a/share/man/man4/Makefile b/share/man/man4/Makefile index dca2775deadc..74d0c3d8b1d1 100644 --- a/share/man/man4/Makefile +++ b/share/man/man4/Makefile @@ -173,6 +173,7 @@ MAN= aac.4 \ le.4 \ led.4 \ lge.4 \ + ${_lindev.4} \ ${_linux.4} \ lmc.4 \ lo.4 \ @@ -625,6 +626,7 @@ _if_urtw.4= if_urtw.4 _if_wpi.4= if_wpi.4 _ipmi.4= ipmi.4 _io.4= io.4 +_lindev.4= lindev.4 _linux.4= linux.4 _ndis.4= ndis.4 _nfe.4= nfe.4 @@ -636,6 +638,8 @@ _speaker.4= speaker.4 _spkr.4= spkr.4 _urtw.4= urtw.4 _wpi.4= wpi.4 + +MLINKS+=lindev.4 full.4 .endif .if exists(${.CURDIR}/man4.${MACHINE_ARCH}) diff --git a/share/man/man4/lindev.4 b/share/man/man4/lindev.4 new file mode 100644 index 000000000000..b2dc60efc80b --- /dev/null +++ b/share/man/man4/lindev.4 @@ -0,0 +1,73 @@ +.\"- +.\" Copyright (c) 2009 "Bjoern A. Zeeb" +.\" All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" $FreeBSD$ +.\" +.Dd September 26, 2009 +.Dt LINDEV 4 +.Os +.Sh NAME +.Nm lindev +.Nd the lindev module +.Sh SYNOPSIS +To compile this collection of linux-specific pseudo devices into the kernel, +place the following line in your kernel configuration file: +.Bd -ragged -offset indent +.Cd "device lindev" +.Ed +.Pp +Alternatively, to load the driver as a module at boot time, +place the following line in +.Xr loader.conf 5 : +.Bd -literal -offset indent +lindev_load="YES" +.Ed +.Sh DESCRIPTION +The +.Nm +module provides a collection of linux-specific pseudo devices. +.Sh DEVICES +.Bl -tag -width /dev/full +.It Pa /dev/full +The +.Xr full +device always returns +.Er ENOSPC +on write attempts. +For reads it emulates +.Xr zero 4 . +.El +.Sh FILES +.Bl -tag -width /dev/full +.It Pa /dev/full +.El +.Sh SEE ALSO +.Xr null 4 , +.Xr zero 4 +.Sh HISTORY +The +.Nm +module first appeared in +.Fx 9.0 . diff --git a/sys/amd64/conf/NOTES b/sys/amd64/conf/NOTES index f3619cfa717b..d213643e58f8 100644 --- a/sys/amd64/conf/NOTES +++ b/sys/amd64/conf/NOTES @@ -517,3 +517,6 @@ options VM_KMEM_SIZE_SCALE # Enable NDIS binary driver support options NDISAPI device ndis + +# Linux-specific pseudo devices support +device lindev diff --git a/sys/boot/forth/loader.conf b/sys/boot/forth/loader.conf index 862e86ffa214..44eef5fb9b1e 100644 --- a/sys/boot/forth/loader.conf +++ b/sys/boot/forth/loader.conf @@ -179,6 +179,7 @@ screensave_name="green_saver" # Set to the name of the screensaver module ibcs2_load="NO" # IBCS2 (SCO) emulation ibcs2_coff_load="NO" linux_load="NO" # Linux emulation +lindev_load="NO" # Linux-specific pseudo devices (see lindev(4)) svr4_load="NO" # SystemV R4 emulation streams_load="NO" # System V streams module diff --git a/sys/conf/files.amd64 b/sys/conf/files.amd64 index 0721ea4ec3bc..30d6e5ac1332 100644 --- a/sys/conf/files.amd64 +++ b/sys/conf/files.amd64 @@ -208,6 +208,8 @@ dev/hwpmc/hwpmc_piv.c optional hwpmc dev/hwpmc/hwpmc_tsc.c optional hwpmc dev/hwpmc/hwpmc_x86.c optional hwpmc dev/kbd/kbd.c optional atkbd | sc | ukbd | usb2_input_kbd +dev/lindev/full.c optional lindev +dev/lindev/lindev.c optional lindev dev/mem/memutil.c optional mem dev/nfe/if_nfe.c optional nfe pci dev/nve/if_nve.c optional nve pci diff --git a/sys/conf/files.i386 b/sys/conf/files.i386 index ef6d590b5f2e..7f6cadd4293b 100644 --- a/sys/conf/files.i386 +++ b/sys/conf/files.i386 @@ -201,6 +201,8 @@ dev/ipmi/ipmi_pci.c optional ipmi pci dev/ipmi/ipmi_linux.c optional ipmi compat_linux dev/kbd/kbd.c optional atkbd | sc | ukbd | usb2_input_kbd dev/le/if_le_isa.c optional le isa +dev/lindev/full.c optional lindev +dev/lindev/lindev.c optional lindev dev/mem/memutil.c optional mem dev/mse/mse.c optional mse dev/mse/mse_isa.c optional mse isa diff --git a/sys/conf/files.pc98 b/sys/conf/files.pc98 index 7aedb38517a3..7f2afc5059cb 100644 --- a/sys/conf/files.pc98 +++ b/sys/conf/files.pc98 @@ -107,6 +107,8 @@ dev/hwpmc/hwpmc_x86.c optional hwpmc dev/io/iodev.c optional io dev/kbd/kbd.c optional pckbd | sc | ukbd | usb2_input_kbd dev/le/if_le_cbus.c optional le isa +dev/lindev/full.c optional lindev +dev/lindev/lindev.c optional lindev dev/mem/memutil.c optional mem dev/mse/mse.c optional mse dev/mse/mse_cbus.c optional mse isa diff --git a/sys/dev/lindev/full.c b/sys/dev/lindev/full.c new file mode 100644 index 000000000000..294094c075d3 --- /dev/null +++ b/sys/dev/lindev/full.c @@ -0,0 +1,103 @@ +/*- + * Copyright (c) 2009 Ed Schouten + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include +__FBSDID("$FreeBSD$"); + +#include +#include +#include +#include +#include +#include +#include + +#include + +static struct cdev *full_dev; + +static d_read_t full_read; +static d_write_t full_write; + +static struct cdevsw full_cdevsw = { + .d_version = D_VERSION, + .d_read = full_read, + .d_write = full_write, + .d_name = "full", +}; + +static void *zbuf; + +/* ARGSUSED */ +static int +full_read(struct cdev *dev __unused, struct uio *uio, int flags __unused) +{ + int error = 0; + + while (uio->uio_resid > 0 && error == 0) + error = uiomove(zbuf, MIN(uio->uio_resid, PAGE_SIZE), uio); + + return (error); +} + +/* ARGSUSED */ +static int +full_write(struct cdev *dev __unused, struct uio *uio __unused, + int flags __unused) +{ + + return (ENOSPC); +} + +/* ARGSUSED */ +int +lindev_modevent_full(module_t mod __unused, int type, void *data __unused) +{ + + switch(type) { + case MOD_LOAD: + zbuf = (void *)malloc(PAGE_SIZE, M_TEMP, M_WAITOK | M_ZERO); + full_dev = make_dev(&full_cdevsw, 0, UID_ROOT, GID_WHEEL, + 0666, "full"); + if (bootverbose) + printf("full: \n"); + break; + + case MOD_UNLOAD: + destroy_dev(full_dev); + free(zbuf, M_TEMP); + break; + + case MOD_SHUTDOWN: + break; + + default: + return (EOPNOTSUPP); + } + + return (0); +} + diff --git a/sys/dev/lindev/lindev.c b/sys/dev/lindev/lindev.c new file mode 100644 index 000000000000..cf876042ae95 --- /dev/null +++ b/sys/dev/lindev/lindev.c @@ -0,0 +1,73 @@ +/*- + * Copyright (c) 2009 "Bjoern A. Zeeb" + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* + * "lindev" is supposed to be a collection of linux-specific devices + * that we also support, just not by default. + * While currently there is only "/dev/full", we are planning to see + * more in the future. + * This file is only the container to load/unload all supported devices; + * the implementation of each should go into its own file. + */ + +#include +__FBSDID("$FreeBSD$"); + +#include +#include +#include +#include + +#include + +/* ARGSUSED */ +static int +lindev_modevent(module_t mod, int type, void *data) +{ + int error; + + switch(type) { + case MOD_LOAD: + error = lindev_modevent_full(mod, type, data); + break; + + case MOD_UNLOAD: + error = lindev_modevent_full(mod, type, data); + break; + + case MOD_SHUTDOWN: + error = lindev_modevent_full(mod, type, data); + break; + + default: + return (EOPNOTSUPP); + } + + return (error); +} + +DEV_MODULE(lindev, lindev_modevent, NULL); +MODULE_VERSION(lindev, 1); diff --git a/sys/dev/lindev/lindev.h b/sys/dev/lindev/lindev.h new file mode 100644 index 000000000000..9b0be8250a02 --- /dev/null +++ b/sys/dev/lindev/lindev.h @@ -0,0 +1,34 @@ +/*- + * Copyright (c) 2009 "Bjoern A. Zeeb" + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _DEV_LINDEV_LINDEV_H +#define _DEV_LINDEV_LINDEV_H + +int lindev_modevent_full(module_t, int, void *); + +#endif /* _DEV_LINDEV_LINDEV_H */ diff --git a/sys/i386/conf/NOTES b/sys/i386/conf/NOTES index 594c43a5669c..d85e3f6abc77 100644 --- a/sys/i386/conf/NOTES +++ b/sys/i386/conf/NOTES @@ -880,6 +880,9 @@ device streams # STREAMS network driver (required for svr4). options NDISAPI device ndis +# Linux-specific pseudo devices support +device lindev + ##################################################################### # VM OPTIONS diff --git a/sys/modules/Makefile b/sys/modules/Makefile index 49d88600d1a6..88d02997814d 100644 --- a/sys/modules/Makefile +++ b/sys/modules/Makefile @@ -151,6 +151,7 @@ SUBDIR= ${_3dfx} \ libiconv \ libmbpool \ libmchain \ + ${_lindev} \ ${_linprocfs} \ ${_linsysfs} \ ${_linux} \ @@ -373,6 +374,7 @@ _ie= ie _if_ndis= if_ndis _igb= igb _io= io +_lindev= lindev _linprocfs= linprocfs _linsysfs= linsysfs _linux= linux @@ -510,6 +512,7 @@ _ipwfw= ipwfw _iwn= iwn _iwnfw= iwnfw _ixgb= ixgb +_lindev= lindev _linprocfs= linprocfs _linsysfs= linsysfs _linux= linux diff --git a/sys/modules/lindev/Makefile b/sys/modules/lindev/Makefile new file mode 100644 index 000000000000..704cac331dce --- /dev/null +++ b/sys/modules/lindev/Makefile @@ -0,0 +1,8 @@ +# $FreeBSD$ + +.PATH: ${.CURDIR}/../../dev/lindev + +KMOD= lindev +SRCS= full.c lindev.c + +.include diff --git a/sys/pc98/conf/NOTES b/sys/pc98/conf/NOTES index 9ab70b9e5d1c..990fc94a2ea0 100644 --- a/sys/pc98/conf/NOTES +++ b/sys/pc98/conf/NOTES @@ -565,6 +565,9 @@ options COMPAT_SVR4 # build emulator statically options DEBUG_SVR4 # enable verbose debugging device streams # STREAMS network driver (required for svr4). +# Linux-specific pseudo devices support +device lindev + ##################################################################### # VM OPTIONS