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author | Bjoern A. Zeeb <bz@FreeBSD.org> | 2009-09-26 12:45:28 +0000 |
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committer | Bjoern A. Zeeb <bz@FreeBSD.org> | 2009-09-26 12:45:28 +0000 |
commit | 4507f02e0ea22f2cc59d673f11d2a95fedef2127 (patch) | |
tree | 47dc298ceb152b7dadd32afc66fa93bacd840418 /sys/dev/lindev | |
parent | ab711589df4cf53441b77a098244f5b8968ff294 (diff) | |
download | src-4507f02e0ea22f2cc59d673f11d2a95fedef2127.tar.gz src-4507f02e0ea22f2cc59d673f11d2a95fedef2127.zip |
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
Notes
Notes:
svn path=/head/; revision=197518
Diffstat (limited to 'sys/dev/lindev')
-rw-r--r-- | sys/dev/lindev/full.c | 103 | ||||
-rw-r--r-- | sys/dev/lindev/lindev.c | 73 | ||||
-rw-r--r-- | sys/dev/lindev/lindev.h | 34 |
3 files changed, 210 insertions, 0 deletions
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 <ed@FreeBSD.org> + * 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 <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/conf.h> +#include <sys/kernel.h> +#include <sys/malloc.h> +#include <sys/module.h> +#include <sys/systm.h> +#include <sys/uio.h> + +#include <dev/lindev/lindev.h> + +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: <full device>\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" <bz@FreeBSD.org> + * 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 <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/conf.h> +#include <sys/kernel.h> +#include <sys/module.h> + +#include <dev/lindev/lindev.h> + +/* 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" <bz@FreeBSD.org> + * 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 */ |