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Initial import of character device in userspace support for FreeBSD.

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The CUSE library is a wrapper for the devfs kernel functionality which
is exposed through /dev/cuse . In order to function the CUSE kernel
code must either be enabled in the kernel configuration file or loaded
separately as a module. Currently none of the committed items are
connected to the default builds, except for installing the needed
header files. The CUSE code will be connected to the default world and
kernel builds in a follow-up commit.

The CUSE module was written by Hans Petter Selasky, somewhat inspired
by similar functionality found in FUSE. The CUSE library can be used
for many purposes. Currently CUSE is used when running Linux kernel
drivers in user-space, which need to create a character device node to
communicate with its applications. CUSE has full support for almost
all devfs functionality found in the kernel:
 - kevents
 - read
 - write
 - ioctl
 - poll
 - open
 - close
 - mmap
 - private per file handle data

Requested by several people. Also see "multimedia/cuse4bsd-kmod" in
ports.
This commit is contained in:
Hans Petter Selasky 2014-05-23 08:46:28 +00:00
parent 7cb79611c2
commit fa0f6e62c6
11 changed files with 3430 additions and 0 deletions
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2
etc/mtree/BSD.include.dist
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@ -162,6 +162,8 @@
..
..
fs
cuse
..
devfs
..
fdescfs

1
include/Makefile
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@ -45,6 +45,7 @@ LSUBDIRS= cam/ata cam/scsi \
dev/ic dev/iicbus ${_dev_ieee488} dev/io dev/lmc dev/mfi dev/nvme \
dev/ofw dev/pbio dev/pci ${_dev_powermac_nvram} dev/ppbus dev/smbus \
dev/speaker dev/usb dev/utopia dev/vkbd dev/wi \
fs/cuse \
fs/devfs fs/fdescfs fs/msdosfs fs/nandfs fs/nfs fs/nullfs \
fs/procfs fs/smbfs fs/udf fs/unionfs \
geom/cache geom/concat geom/eli geom/gate geom/journal geom/label \

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lib/libcuse/Makefile Normal file
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# $FreeBSD$
#
# Copyright (c) 2010 Hans Petter Selasky. 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.
#
LIB= cuse
SHLIB_MAJOR= 1
SHLIB_MINOR= 0
SRCS= cuse_lib.c
INCS= cuse.h
MAN= cuse.3
PTHREAD_LIBS?= -lpthread
CFLAGS+= -D_GNU_SOURCE
.if defined(HAVE_DEBUG)
CFLAGS+= -g
CFLAGS+= -DHAVE_DEBUG
.endif
LDADD+= ${PTHREAD_LIBS}
MLINKS=
MLINKS+= cuse.3 cuse_alloc_unit_number.3
MLINKS+= cuse.3 cuse_copy_in.3
MLINKS+= cuse.3 cuse_copy_out.3
MLINKS+= cuse.3 cuse_dev_create.3
MLINKS+= cuse.3 cuse_dev_destroy.3
MLINKS+= cuse.3 cuse_dev_get_current.3
MLINKS+= cuse.3 cuse_dev_get_per_file_handle.3
MLINKS+= cuse.3 cuse_dev_get_priv0.3
MLINKS+= cuse.3 cuse_dev_get_priv1.3
MLINKS+= cuse.3 cuse_dev_set_per_file_handle.3
MLINKS+= cuse.3 cuse_free_unit_number.3
MLINKS+= cuse.3 cuse_got_peer_signal.3
MLINKS+= cuse.3 cuse_init.3
MLINKS+= cuse.3 cuse_poll_wakeup.3
MLINKS+= cuse.3 cuse_set_local.3
MLINKS+= cuse.3 cuse_get_local.3
MLINKS+= cuse.3 cuse_uninit.3
MLINKS+= cuse.3 cuse_vmalloc.3
MLINKS+= cuse.3 cuse_is_vmalloc_addr.3
MLINKS+= cuse.3 cuse_vmfree.3
MLINKS+= cuse.3 cuse_wait_and_process.3
.include <bsd.lib.mk>

393
lib/libcuse/cuse.3 Normal file
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.\" $FreeBSD$
.\"
.\" Copyright (c) 2010-2013 Hans Petter Selasky
.\"
.\" 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.
.\"
.Dd May 23, 2014
.Dt CUSE 3
.Os
.Sh NAME
.Nm libcuse
.
.Nd "Userland character device library"
.
.
.Sh LIBRARY
.
.
Userland character device library (libcuse -lcuse)
.
.
.Sh SYNOPSIS
.
.Pp
To load the required kernel module at boot time, place the following line in
.Xr loader.conf 5 :
.Bd -literal -offset indent
cuse_load="YES"
.Ed
.
.Pp
.
.In cuse.h
.
.
.Sh DESCRIPTION
The
.Nm
library contains functions to create a character device in userspace. The
.Nm
library is thread safe.
.
.
.Sh LIBRARY INITIALISATION / DEINITIALISATION
.
.Pp
.
.Ft "int"
.Fn "cuse_init" "void"
This function initialises
.Nm .
Must be called at the beginning of the program.
This function returns 0 on success or a negative value on failure.
See CUSE_ERR_XXX for known error codes.
If the cuse kernel module is not loaded, CUSE_ERR_NOT_LOADED is
returned.
.
.Pp
.
.Ft "int"
.Fn "cuse_uninit" "void"
Deinitialise
.Nm .
Can be called at the end of the application.
This function returns 0 on success or a negative value on failure.
See CUSE_ERR_XXX for known error codes.
.
.
.Sh UNIT MANAGEMENT
.
.Ft "int"
.Fn "cuse_alloc_unit_number" "int *"
This function stores a uniq system unit number at the pointed
integer loation.
This function returns 0 on success or a negative value on failure.
See CUSE_ERR_XXX for known error codes.
.
.Pp
.
.Ft "int"
.Fn "cuse_alloc_unit_number_by_id" "int *" "int id"
This function stores a uniq system unit number at the pointed
integer loation.
The returned unit number is uniq within the given ID.
Valid ID values are defined by the cuse include file.
See the CUSE_ID_XXX() macros for more information.
This function returns 0 on success or a negative value on failure.
See CUSE_ERR_XXX for known error codes.
.
.Pp
.
.Ft "int"
.Fn "cuse_free_unit_number" "int"
This function frees the given allocated system unit number.
This function returns 0 on success or a negative value on failure.
See CUSE_ERR_XXX for known error codes.
.
.Pp
.
.Ft "int"
.Fn "cuse_free_unit_number_by_id" "int unit" "int id"
This function frees the given allocated system unit number belonging
to the given ID.
If both the unit and id argument is -1, all allocated units will be freed.
This function returns 0 on success or a negative value on failure.
See CUSE_ERR_XXX for known error codes.
.
.
.Sh LIBRARY USAGE
.
.
.Ft "void *"
.Fn "cuse_vmalloc" "int size"
This function allocates
.Ar size
bytes of memory. Only memory allocated by this function can be memory
mapped by mmap(). This function returns a valid data pointer on success or
NULL on failure.
.
.Pp
.
.Ft "int"
.Fn "cuse_is_vmalloc_addr" "void *"
This function returns non-zero if the passed pointer points to a valid
and non-freed allocation, as returned by "cuse_vmalloc()".
Else this function returns zero.
.
.Pp
.
.Ft "void"
.Fn "cuse_vmfree" "void *"
This function frees memory allocated by cuse_vmalloc(). Note that the
cuse library will internally not free the memory until the
cuse_uninit() function is called and that the number of uniq
allocations is limited.
.
.
.Pp
.
.Ft "unsigned long"
.Fn "cuse_vmoffset" "void *"
This function returns the mmap offset that the client must use to
access the allocated memory.
.
.Pp
.
.Ft "struct cuse_dev *"
.Fn "cuse_dev_create" "const struct cuse_methods *mtod" "void *priv0" "void *priv1" "uid_t" "gid_t" "int permission" "const char *fmt" "..."
This function creates a new character device according to the given
parameters. This function returns a valid cuse_dev structure pointer
on success or NULL on failure. The device name can only contain a-z,
A-Z, 0-9, dot, / and underscore characters.
.
.Pp
.
.Ft "void"
.Fn "cuse_dev_destroy" "struct cuse_dev *"
This functions destroys a previously created character device.
.
.Pp
.
.
.Ft "void *"
.Fn "cuse_dev_get_priv0" "struct cuse_dev *"
,
.Ft "void *"
.Fn "cuse_dev_get_priv1" "struct cuse_dev *"
,
.Ft "void"
.Fn "cuse_dev_set_priv0" "struct cuse_dev *" "void *"
,
.Ft "void"
.Fn "cuse_dev_set_priv1" "struct cuse_dev *" "void *"
These functions are used to set and get the private data of the given
cuse device.
.
.Pp
.
.Ft "int"
.Fn "cuse_wait_and_process" "void"
This function will block and do event processing. If parallell I/O is
required multiple threads must be created looping on this
function.
This function returns 0 on success or a negative value on failure.
See CUSE_ERR_XXX for known error codes.
.
.Pp
.
.Ft "void *"
.Fn "cuse_dev_get_per_file_handle" "struct cuse_dev *"
,
.Ft "void"
.Fn "cuse_dev_set_per_file_handle" "struct cuse_dev *" "void *"
These functions are used to set and get the per-file-open specific handle
and should only be used inside the cuse file operation callbacks.
.
.Pp
.
.Ft "void"
.Fn "cuse_set_local" "int"
This function instructs cuse_copy_out() and cuse_copy_in() that the
user pointer is local, if the argument passed to it is non-zero.
Else the user pointer is assumed to be at the peer application.
This function should only be used inside the cuse file operation callbacks.
The value is reset to zero when the given file operation returns, and
does not affect any other file operation callbacks.
.
.Pp
.
.Ft "int"
.Fn "cuse_get_local" "void"
Return current local state. See "cuse_set_local" function.
.
.Pp
.
.Ft "int"
.Fn "cuse_copy_out" "const void *src" "void *peer_dst" "int len"
,
.Ft "int"
.Fn "cuse_copy_in" "const void *peer_src" "void *dst" "int len"
These functions are used to transfer data between the local
application and the peer application. These functions must be used
when operating on the data pointers passed to the cm_read(),
cm_write() and cm_ioctl() callback functions.
These functions return 0 on success or a negative value on failure.
See CUSE_ERR_XXX for known error codes.
.
.Pp
.
.Ft "int"
.Fn "cuse_got_peer_signal" "void"
This function is used to check if a signal has been delivered to the
peer application and should only be used inside the cuse file
operation callbacks. This function returns 0 if a signal has been
delivered to the caller.
Else it returns a negative value.
See CUSE_ERR_XXX for known error codes.
.
.Pp
.
.Ft "struct cuse_dev *"
.Fn "cuse_dev_get_current" "int *pcmd"
This function is used to get the current cuse device pointer and the
currently executing command, by CUSE_CMD_XXX value. The pcmd argument
is allowed to be NULL. This function should only be used inside the
cuse file operation callbacks. On success a valid cuse device pointer
is returned. On failure NULL is returned.
.
.Pp
.
.Ft "void"
.Fn "cuse_poll_wakeup" "void"
This function will wake up any file pollers.
.
.Pp
.
.Sh LIBRARY LIMITATIONS
.
.
Transfer lengths for read, write, cuse_copy_in and cuse_copy_out
should not exceed what can fit into a 32-bit signed integer and is
defined by the CUSE_LENGTH_MAX macro.
.
Transfer lengths for ioctls should not exceed what is defined by the
CUSE_BUFFER_MAX macro.
.
.
.Sh LIBRARY CALLBACK METHODS
.
In general fflags are defined by CUSE_FFLAG_XXX and errors are defined by CUSE_ERR_XXX.
.
.Bd -literal -offset indent
enum {
CUSE_ERR_NONE
CUSE_ERR_BUSY
CUSE_ERR_WOULDBLOCK
CUSE_ERR_INVALID
CUSE_ERR_NO_MEMORY
CUSE_ERR_FAULT
CUSE_ERR_SIGNAL
CUSE_ERR_OTHER
CUSE_ERR_NOT_LOADED
CUSE_POLL_NONE
CUSE_POLL_READ
CUSE_POLL_WRITE
CUSE_POLL_ERROR
CUSE_FFLAG_NONE
CUSE_FFLAG_READ
CUSE_FFLAG_WRITE
CUSE_FFLAG_NONBLOCK
CUSE_CMD_NONE
CUSE_CMD_OPEN
CUSE_CMD_CLOSE
CUSE_CMD_READ
CUSE_CMD_WRITE
CUSE_CMD_IOCTL
CUSE_CMD_POLL
CUSE_CMD_SIGNAL
CUSE_CMD_SYNC
CUSE_CMD_MAX
};
.Ed
.
.Pp
.
.Ft "int"
.Fn "cuse_open_t" "struct cuse_dev *" "int fflags"
This functions returns a CUSE_ERR_XXX value.
.
.Pp
.
.Ft "int"
.Fn "cuse_close_t" "struct cuse_dev *" "int fflags"
This functions returns a CUSE_ERR_XXX value.
.
.Pp
.
.Ft "int"
.Fn "cuse_read_t" "struct cuse_dev *" "int fflags" "void *peer_ptr" "int len"
This functions returns a CUSE_ERR_XXX value in case of failure or the
actually transferred length in case of success. cuse_copy_in() and
cuse_copy_out() must be used to transfer data to and from the
peer_ptr.
.
.Pp
.
.Ft "int"
.Fn "cuse_write_t" "struct cuse_dev *" "int fflags" "const void *peer_ptr" "int len"
This functions returns a CUSE_ERR_XXX value in case of failure or the
actually transferred length in case of success. cuse_copy_in() and
cuse_copy_out() must be used to transfer data to and from the
peer_ptr.
.
.Pp
.
.Ft "int"
.Fn "cuse_ioctl_t" "struct cuse_dev *" "int fflags" "unsigned long cmd" "void *peer_data"
This functions returns a CUSE_ERR_XXX value in case of failure or zero
in case of success. cuse_copy_in() and cuse_copy_out() must be used to
transfer data to and from the peer_data.
.
.Pp
.
.Ft "int"
.Fn "cuse_poll_t" "struct cuse_dev *" "int fflags" "int events"
This functions returns a mask of CUSE_POLL_XXX values in case of
failure and success. The events argument is also a mask of
CUSE_POLL_XXX values.
.
.Pp
.
.Bd -literal -offset indent
struct cuse_methods {
cuse_open_t *cm_open;
cuse_close_t *cm_close;
cuse_read_t *cm_read;
cuse_write_t *cm_write;
cuse_ioctl_t *cm_ioctl;
cuse_poll_t *cm_poll;
};
.Ed
.
.
.Sh SEE ALSO
.
.Sh HISTORY
.
.Nm
was written by Hans Petter Selasky .

97
lib/libcuse/cuse.h Normal file
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/* $FreeBSD$ */
/*-
* Copyright (c) 2014 Hans Petter Selasky. 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.
*/
#ifndef _CUSE_H_
#define _CUSE_H_
#ifdef __cplusplus
extern "C" {
#endif
#include <fs/cuse/cuse_defs.h>
struct cuse_dev;
typedef int (cuse_open_t)(struct cuse_dev *, int fflags);
typedef int (cuse_close_t)(struct cuse_dev *, int fflags);
typedef int (cuse_read_t)(struct cuse_dev *, int fflags, void *user_ptr, int len);
typedef int (cuse_write_t)(struct cuse_dev *, int fflags, const void *user_ptr, int len);
typedef int (cuse_ioctl_t)(struct cuse_dev *, int fflags, unsigned long cmd, void *user_data);
typedef int (cuse_poll_t)(struct cuse_dev *, int fflags, int events);
struct cuse_methods {
cuse_open_t *cm_open;
cuse_close_t *cm_close;
cuse_read_t *cm_read;
cuse_write_t *cm_write;
cuse_ioctl_t *cm_ioctl;
cuse_poll_t *cm_poll;
};
int cuse_init(void);
int cuse_uninit(void);
void *cuse_vmalloc(int);
int cuse_is_vmalloc_addr(void *);
void cuse_vmfree(void *);
unsigned long cuse_vmoffset(void *ptr);
int cuse_alloc_unit_number_by_id(int *, int);
int cuse_free_unit_number_by_id(int, int);
int cuse_alloc_unit_number(int *);
int cuse_free_unit_number(int);
struct cuse_dev *cuse_dev_create(const struct cuse_methods *, void *, void *, uid_t, gid_t, int, const char *,...);
void cuse_dev_destroy(struct cuse_dev *);
void *cuse_dev_get_priv0(struct cuse_dev *);
void *cuse_dev_get_priv1(struct cuse_dev *);
void cuse_dev_set_priv0(struct cuse_dev *, void *);
void cuse_dev_set_priv1(struct cuse_dev *, void *);
void cuse_set_local(int);
int cuse_get_local(void);
int cuse_wait_and_process(void);
void cuse_dev_set_per_file_handle(struct cuse_dev *, void *);
void *cuse_dev_get_per_file_handle(struct cuse_dev *);
int cuse_copy_out(const void *src, void *user_dst, int len);
int cuse_copy_in(const void *user_src, void *dst, int len);
int cuse_got_peer_signal(void);
void cuse_poll_wakeup(void);
struct cuse_dev *cuse_dev_get_current(int *);
extern int cuse_debug_level;
#ifdef __cplusplus
}
#endif
#endif /* _CUSE_H_ */

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lib/libcuse/cuse_lib.c Normal file
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/* $FreeBSD$ */
/*-
* Copyright (c) 2010-2012 Hans Petter Selasky. 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 <stdio.h>
#include <stdint.h>
#include <pthread.h>
#include <signal.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>
#include <stdarg.h>
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/fcntl.h>
#include <sys/mman.h>
#include <sys/param.h>
#include <fs/cuse/cuse_ioctl.h>
#include "cuse.h"
int cuse_debug_level;
#ifdef HAVE_DEBUG
static const char *cuse_cmd_str(int cmd);
#define DPRINTF(...) do { \
if (cuse_debug_level != 0) \
printf(__VA_ARGS__); \
} while (0)
#else
#define DPRINTF(...) do { } while (0)
#endif
struct cuse_vm_allocation {
uint8_t *ptr;
uint32_t size;
};
struct cuse_dev_entered {
TAILQ_ENTRY(cuse_dev_entered) entry;
pthread_t thread;
void *per_file_handle;
struct cuse_dev *cdev;
int cmd;
int is_local;
int got_signal;
};
struct cuse_dev {
TAILQ_ENTRY(cuse_dev) entry;
const struct cuse_methods *mtod;
void *priv0;
void *priv1;
};
static TAILQ_HEAD(, cuse_dev) h_cuse;
static TAILQ_HEAD(, cuse_dev_entered) h_cuse_entered;
static int f_cuse = -1;
static pthread_mutex_t m_cuse;
static struct cuse_vm_allocation a_cuse[CUSE_ALLOC_UNIT_MAX];
static void
cuse_lock(void)
{
pthread_mutex_lock(&m_cuse);
}
static void
cuse_unlock(void)
{
pthread_mutex_unlock(&m_cuse);
}
int
cuse_init(void)
{
pthread_mutexattr_t attr;
f_cuse = open("/dev/cuse", O_RDWR);
if (f_cuse < 0) {
if (feature_present("cuse") == 0)
return (CUSE_ERR_NOT_LOADED);
else
return (CUSE_ERR_INVALID);
}
pthread_mutexattr_init(&attr);
pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
pthread_mutex_init(&m_cuse, &attr);
TAILQ_INIT(&h_cuse);
TAILQ_INIT(&h_cuse_entered);
return (0);
}
int
cuse_uninit(void)
{
int f;
if (f_cuse < 0)
return (CUSE_ERR_INVALID);
f = f_cuse;
f_cuse = -1;
close(f);
pthread_mutex_destroy(&m_cuse);
memset(a_cuse, 0, sizeof(a_cuse));
return (0);
}
unsigned long
cuse_vmoffset(void *_ptr)
{
uint8_t *ptr_min;
uint8_t *ptr_max;
uint8_t *ptr = _ptr;
unsigned long remainder;
int n;
cuse_lock();
for (n = 0; n != CUSE_ALLOC_UNIT_MAX; n++) {
if (a_cuse[n].ptr == NULL)
continue;
ptr_min = a_cuse[n].ptr;
ptr_max = a_cuse[n].ptr + a_cuse[n].size - 1;
if ((ptr >= ptr_min) && (ptr <= ptr_max)) {
cuse_unlock();
remainder = (ptr - ptr_min);
remainder -= remainder % PAGE_SIZE;
return ((n * PAGE_SIZE * CUSE_ALLOC_PAGES_MAX) + remainder);
}
}
cuse_unlock();
return (0x80000000UL); /* failure */
}
void *
cuse_vmalloc(int size)
{
struct cuse_alloc_info info;
void *ptr;
int error;
int n;
if (f_cuse < 0)
return (NULL);
memset(&info, 0, sizeof(info));
if (size < 1)
return (NULL);
info.page_count = (size + PAGE_SIZE - 1) / PAGE_SIZE;
cuse_lock();
for (n = 0; n != CUSE_ALLOC_UNIT_MAX; n++) {
if (a_cuse[n].ptr != NULL)
continue;
a_cuse[n].ptr = ((uint8_t *)1); /* reserve */
a_cuse[n].size = 0;
cuse_unlock();
info.alloc_nr = n;
error = ioctl(f_cuse, CUSE_IOCTL_ALLOC_MEMORY, &info);
if (error) {
cuse_lock();
a_cuse[n].ptr = NULL;
if (errno == EBUSY)
continue;
else
break;
}
ptr = mmap(NULL, info.page_count * PAGE_SIZE,
PROT_READ | PROT_WRITE,
MAP_SHARED, f_cuse, CUSE_ALLOC_PAGES_MAX *
PAGE_SIZE * n);
if (ptr == MAP_FAILED) {
error = ioctl(f_cuse, CUSE_IOCTL_FREE_MEMORY, &info);
if (error) {
/* ignore */
}
cuse_lock();
a_cuse[n].ptr = NULL;
break;
}
cuse_lock();
a_cuse[n].ptr = ptr;
a_cuse[n].size = size;
cuse_unlock();
return (ptr); /* success */
}
cuse_unlock();
return (NULL); /* failure */
}
int
cuse_is_vmalloc_addr(void *ptr)
{
int n;
if (f_cuse < 0 || ptr == NULL)
return (0); /* false */
cuse_lock();
for (n = 0; n != CUSE_ALLOC_UNIT_MAX; n++) {
if (a_cuse[n].ptr == ptr)
break;
}
cuse_unlock();
return (n != CUSE_ALLOC_UNIT_MAX);
}
void
cuse_vmfree(void *ptr)
{
struct cuse_alloc_info info;
int error;
int n;
if (f_cuse < 0)
return;
memset(&info, 0, sizeof(info));
cuse_lock();
for (n = 0; n != CUSE_ALLOC_UNIT_MAX; n++) {
if (a_cuse[n].ptr != ptr)
continue;
cuse_unlock();
info.alloc_nr = n;
munmap(ptr, a_cuse[n].size);
error = ioctl(f_cuse, CUSE_IOCTL_FREE_MEMORY, &info);
if (error) {
/* ignore */
}
cuse_lock();
a_cuse[n].ptr = NULL;
a_cuse[n].size = 0;
break;
}
cuse_unlock();
}
int
cuse_alloc_unit_number_by_id(int *pnum, int id)
{
int error;
if (f_cuse < 0)
return (CUSE_ERR_INVALID);
*pnum = (id & CUSE_ID_MASK);
error = ioctl(f_cuse, CUSE_IOCTL_ALLOC_UNIT_BY_ID, pnum);
if (error)
return (CUSE_ERR_NO_MEMORY);
return (0);
}
int
cuse_free_unit_number_by_id(int num, int id)
{
int error;
if (f_cuse < 0)
return (CUSE_ERR_INVALID);
if (num != -1 || id != -1)
num = (id & CUSE_ID_MASK) | (num & 0xFF);
error = ioctl(f_cuse, CUSE_IOCTL_FREE_UNIT_BY_ID, &num);
if (error)
return (CUSE_ERR_NO_MEMORY);
return (0);
}
int
cuse_alloc_unit_number(int *pnum)
{
int error;
if (f_cuse < 0)
return (CUSE_ERR_INVALID);
error = ioctl(f_cuse, CUSE_IOCTL_ALLOC_UNIT, pnum);
if (error)
return (CUSE_ERR_NO_MEMORY);
return (0);
}
int
cuse_free_unit_number(int num)
{
int error;
if (f_cuse < 0)
return (CUSE_ERR_INVALID);
error = ioctl(f_cuse, CUSE_IOCTL_FREE_UNIT, &num);
if (error)
return (CUSE_ERR_NO_MEMORY);
return (0);
}
struct cuse_dev *
cuse_dev_create(const struct cuse_methods *mtod, void *priv0, void *priv1,
uid_t _uid, gid_t _gid, int _perms, const char *_fmt,...)
{
struct cuse_create_dev info;
struct cuse_dev *cdev;
va_list args;
int error;
if (f_cuse < 0)
return (NULL);
cdev = malloc(sizeof(*cdev));
if (cdev == NULL)
return (NULL);
memset(cdev, 0, sizeof(*cdev));
cdev->mtod = mtod;
cdev->priv0 = priv0;
cdev->priv1 = priv1;
memset(&info, 0, sizeof(info));
info.dev = cdev;
info.user_id = _uid;
info.group_id = _gid;
info.permissions = _perms;
va_start(args, _fmt);
vsnprintf(info.devname, sizeof(info.devname), _fmt, args);
va_end(args);
error = ioctl(f_cuse, CUSE_IOCTL_CREATE_DEV, &info);
if (error) {
free(cdev);
return (NULL);
}
cuse_lock();
TAILQ_INSERT_TAIL(&h_cuse, cdev, entry);
cuse_unlock();
return (cdev);
}
void
cuse_dev_destroy(struct cuse_dev *cdev)
{
int error;
if (f_cuse < 0)
return;
cuse_lock();
TAILQ_REMOVE(&h_cuse, cdev, entry);
cuse_unlock();
error = ioctl(f_cuse, CUSE_IOCTL_DESTROY_DEV, cdev);
if (error)
return;
free(cdev);
}
void *
cuse_dev_get_priv0(struct cuse_dev *cdev)
{
return (cdev->priv0);
}
void *
cuse_dev_get_priv1(struct cuse_dev *cdev)
{
return (cdev->priv1);
}
void
cuse_dev_set_priv0(struct cuse_dev *cdev, void *priv)
{
cdev->priv0 = priv;
}
void
cuse_dev_set_priv1(struct cuse_dev *cdev, void *priv)
{
cdev->priv1 = priv;
}
int
cuse_wait_and_process(void)
{
pthread_t curr = pthread_self();
struct cuse_dev_entered *pe;
struct cuse_dev_entered enter;
struct cuse_command info;
struct cuse_dev *cdev;
int error;
if (f_cuse < 0)
return (CUSE_ERR_INVALID);
error = ioctl(f_cuse, CUSE_IOCTL_GET_COMMAND, &info);
if (error)
return (CUSE_ERR_OTHER);
cdev = info.dev;
cuse_lock();
enter.thread = curr;
enter.per_file_handle = (void *)info.per_file_handle;
enter.cmd = info.command;
enter.is_local = 0;
enter.got_signal = 0;
enter.cdev = cdev;
TAILQ_INSERT_TAIL(&h_cuse_entered, &enter, entry);
cuse_unlock();
DPRINTF("cuse: Command = %d = %s, flags = %d, arg = 0x%08x, ptr = 0x%08x\n",
(int)info.command, cuse_cmd_str(info.command), (int)info.fflags,
(int)info.argument, (int)info.data_pointer);
switch (info.command) {
case CUSE_CMD_OPEN:
if (cdev->mtod->cm_open != NULL)
error = (cdev->mtod->cm_open) (cdev, (int)info.fflags);
else
error = 0;
break;
case CUSE_CMD_CLOSE:
/* wait for other threads to stop */
while (1) {
error = 0;
cuse_lock();
TAILQ_FOREACH(pe, &h_cuse_entered, entry) {
if (pe->cdev != cdev)
continue;
if (pe->thread == curr)
continue;
if (pe->per_file_handle !=
enter.per_file_handle)
continue;
pe->got_signal = 1;
pthread_kill(pe->thread, SIGHUP);
error = CUSE_ERR_BUSY;
}
cuse_unlock();
if (error == 0)
break;
else
usleep(10000);
}
if (cdev->mtod->cm_close != NULL)
error = (cdev->mtod->cm_close) (cdev, (int)info.fflags);
else
error = 0;
break;
case CUSE_CMD_READ:
if (cdev->mtod->cm_read != NULL) {
error = (cdev->mtod->cm_read) (cdev, (int)info.fflags,
(void *)info.data_pointer, (int)info.argument);
} else {
error = CUSE_ERR_INVALID;
}
break;
case CUSE_CMD_WRITE:
if (cdev->mtod->cm_write != NULL) {
error = (cdev->mtod->cm_write) (cdev, (int)info.fflags,
(void *)info.data_pointer, (int)info.argument);
} else {
error = CUSE_ERR_INVALID;
}
break;
case CUSE_CMD_IOCTL:
if (cdev->mtod->cm_ioctl != NULL) {
error = (cdev->mtod->cm_ioctl) (cdev, (int)info.fflags,
(unsigned int)info.argument, (void *)info.data_pointer);
} else {
error = CUSE_ERR_INVALID;
}
break;
case CUSE_CMD_POLL:
if (cdev->mtod->cm_poll != NULL) {
error = (cdev->mtod->cm_poll) (cdev, (int)info.fflags,
(int)info.argument);
} else {
error = CUSE_POLL_ERROR;
}
break;
case CUSE_CMD_SIGNAL:
cuse_lock();
TAILQ_FOREACH(pe, &h_cuse_entered, entry) {
if (pe->cdev != cdev)
continue;
if (pe->thread == curr)
continue;
if (pe->per_file_handle !=
enter.per_file_handle)
continue;
pe->got_signal = 1;
pthread_kill(pe->thread, SIGHUP);
}
cuse_unlock();
break;
default:
error = CUSE_ERR_INVALID;
break;
}
DPRINTF("cuse: Command error = %d for %s\n",
error, cuse_cmd_str(info.command));
cuse_lock();
TAILQ_REMOVE(&h_cuse_entered, &enter, entry);
cuse_unlock();
/* we ignore any sync command failures */
ioctl(f_cuse, CUSE_IOCTL_SYNC_COMMAND, &error);
return (0);
}
static struct cuse_dev_entered *
cuse_dev_get_entered(void)
{
struct cuse_dev_entered *pe;
pthread_t curr = pthread_self();
cuse_lock();
TAILQ_FOREACH(pe, &h_cuse_entered, entry) {
if (pe->thread == curr)
break;
}
cuse_unlock();
return (pe);
}
void
cuse_dev_set_per_file_handle(struct cuse_dev *cdev, void *handle)
{
struct cuse_dev_entered *pe;
pe = cuse_dev_get_entered();
if (pe == NULL || pe->cdev != cdev)
return;
pe->per_file_handle = handle;
ioctl(f_cuse, CUSE_IOCTL_SET_PFH, &handle);
}
void *
cuse_dev_get_per_file_handle(struct cuse_dev *cdev)
{
struct cuse_dev_entered *pe;
pe = cuse_dev_get_entered();
if (pe == NULL || pe->cdev != cdev)
return (NULL);
return (pe->per_file_handle);
}
void
cuse_set_local(int val)
{
struct cuse_dev_entered *pe;
pe = cuse_dev_get_entered();
if (pe == NULL)
return;
pe->is_local = val;
}
#ifdef HAVE_DEBUG
static const char *
cuse_cmd_str(int cmd)
{
static const char *str[CUSE_CMD_MAX] = {
[CUSE_CMD_NONE] = "none",
[CUSE_CMD_OPEN] = "open",
[CUSE_CMD_CLOSE] = "close",
[CUSE_CMD_READ] = "read",
[CUSE_CMD_WRITE] = "write",
[CUSE_CMD_IOCTL] = "ioctl",
[CUSE_CMD_POLL] = "poll",
[CUSE_CMD_SIGNAL] = "signal",
[CUSE_CMD_SYNC] = "sync",
};
if ((cmd >= 0) && (cmd < CUSE_CMD_MAX) &&
(str[cmd] != NULL))
return (str[cmd]);
else
return ("unknown");
}
#endif
int
cuse_get_local(void)
{
struct cuse_dev_entered *pe;
pe = cuse_dev_get_entered();
if (pe == NULL)
return (0);
return (pe->is_local);
}
int
cuse_copy_out(const void *src, void *user_dst, int len)
{
struct cuse_data_chunk info;
struct cuse_dev_entered *pe;
int error;
if ((f_cuse < 0) || (len < 0))
return (CUSE_ERR_INVALID);
pe = cuse_dev_get_entered();
if (pe == NULL)
return (CUSE_ERR_INVALID);
DPRINTF("cuse: copy_out(%p,%p,%d), cmd = %d = %s\n",
src, user_dst, len, pe->cmd, cuse_cmd_str(pe->cmd));
if (pe->is_local) {
memcpy(user_dst, src, len);
} else {
info.local_ptr = (unsigned long)src;
info.peer_ptr = (unsigned long)user_dst;
info.length = len;
error = ioctl(f_cuse, CUSE_IOCTL_WRITE_DATA, &info);
if (error) {
DPRINTF("cuse: copy_out() error = %d\n", errno);
return (CUSE_ERR_FAULT);
}
}
return (0);
}
int
cuse_copy_in(const void *user_src, void *dst, int len)
{
struct cuse_data_chunk info;
struct cuse_dev_entered *pe;
int error;
if ((f_cuse < 0) || (len < 0))
return (CUSE_ERR_INVALID);
pe = cuse_dev_get_entered();
if (pe == NULL)
return (CUSE_ERR_INVALID);
DPRINTF("cuse: copy_in(%p,%p,%d), cmd = %d = %s\n",
user_src, dst, len, pe->cmd, cuse_cmd_str(pe->cmd));
if (pe->is_local) {
memcpy(dst, user_src, len);
} else {
info.local_ptr = (unsigned long)dst;
info.peer_ptr = (unsigned long)user_src;
info.length = len;
error = ioctl(f_cuse, CUSE_IOCTL_READ_DATA, &info);
if (error) {
DPRINTF("cuse: copy_in() error = %d\n", errno);
return (CUSE_ERR_FAULT);
}
}
return (0);
}
struct cuse_dev *
cuse_dev_get_current(int *pcmd)
{
struct cuse_dev_entered *pe;
pe = cuse_dev_get_entered();
if (pe == NULL) {
if (pcmd != NULL)
*pcmd = 0;
return (NULL);
}
if (pcmd != NULL)
*pcmd = pe->cmd;
return (pe->cdev);
}
int
cuse_got_peer_signal(void)
{
struct cuse_dev_entered *pe;
pe = cuse_dev_get_entered();
if (pe == NULL)
return (CUSE_ERR_INVALID);
if (pe->got_signal)
return (0);
return (CUSE_ERR_OTHER);
}
void
cuse_poll_wakeup(void)
{
int error = 0;
if (f_cuse < 0)
return;
ioctl(f_cuse, CUSE_IOCTL_SELWAKEUP, &error);
}

1
sys/conf/files
View File

@ -2595,6 +2595,7 @@ fs/devfs/devfs_vnops.c standard
fs/fdescfs/fdesc_vfsops.c optional fdescfs
fs/fdescfs/fdesc_vnops.c optional fdescfs
fs/fifofs/fifo_vnops.c standard
fs/cuse/cuse.c optional cuse
fs/fuse/fuse_device.c optional fuse
fs/fuse/fuse_file.c optional fuse
fs/fuse/fuse_internal.c optional fuse

1866
sys/fs/cuse/cuse.c Normal file
View File

File diff suppressed because it is too large Load Diff

86
sys/fs/cuse/cuse_defs.h Normal file
View File

@ -0,0 +1,86 @@
/* $FreeBSD$ */
/*-
* Copyright (c) 2010-2012 Hans Petter Selasky. 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.
*/
#ifndef _CUSE_DEFS_H_
#define _CUSE_DEFS_H_
#define CUSE_VERSION 0x000122
#define CUSE_ERR_NONE 0
#define CUSE_ERR_BUSY -1
#define CUSE_ERR_WOULDBLOCK -2
#define CUSE_ERR_INVALID -3
#define CUSE_ERR_NO_MEMORY -4
#define CUSE_ERR_FAULT -5
#define CUSE_ERR_SIGNAL -6
#define CUSE_ERR_OTHER -7
#define CUSE_ERR_NOT_LOADED -8
#define CUSE_POLL_NONE 0
#define CUSE_POLL_READ 1
#define CUSE_POLL_WRITE 2
#define CUSE_POLL_ERROR 4
#define CUSE_FFLAG_NONE 0
#define CUSE_FFLAG_READ 1
#define CUSE_FFLAG_WRITE 2
#define CUSE_FFLAG_NONBLOCK 4
#define CUSE_DBG_NONE 0
#define CUSE_DBG_FULL 1
/* maximum data transfer length */
#define CUSE_LENGTH_MAX 0x7FFFFFFFU
enum {
CUSE_CMD_NONE,
CUSE_CMD_OPEN,
CUSE_CMD_CLOSE,
CUSE_CMD_READ,
CUSE_CMD_WRITE,
CUSE_CMD_IOCTL,
CUSE_CMD_POLL,
CUSE_CMD_SIGNAL,
CUSE_CMD_SYNC,
CUSE_CMD_MAX,
};
#define CUSE_MAKE_ID(a,b,c,u) ((((a) & 0x7F) << 24)| \
(((b) & 0xFF) << 16)|(((c) & 0xFF) << 8)|((u) & 0xFF))
#define CUSE_ID_MASK 0x7FFFFF00U
/*
* The following ID's are defined:
* ===============================
*/
#define CUSE_ID_DEFAULT(what) CUSE_MAKE_ID(0,0,what,0)
#define CUSE_ID_WEBCAMD(what) CUSE_MAKE_ID('W','C',what,0) /* Used by Webcamd. */
#define CUSE_ID_SUNDTEK(what) CUSE_MAKE_ID('S','K',what,0) /* Used by Sundtek. */
#define CUSE_ID_CX88(what) CUSE_MAKE_ID('C','X',what,0) /* Used by cx88 driver. */
#define CUSE_ID_UHIDD(what) CUSE_MAKE_ID('U','D',what,0) /* Used by uhidd. */
#endif /* _CUSE_DEFS_H_ */

88
sys/fs/cuse/cuse_ioctl.h Normal file
View File

@ -0,0 +1,88 @@
/* $FreeBSD$ */
/*-
* Copyright (c) 2014 Hans Petter Selasky. 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.
*/
#ifndef _CUSE_IOCTL_H_
#define _CUSE_IOCTL_H_
#include <sys/ioccom.h>
#include <sys/types.h>
#define CUSE_BUFFER_MAX PAGE_SIZE
#define CUSE_DEVICES_MAX 64 /* units */
#define CUSE_BUF_MIN_PTR 0x10000UL
#define CUSE_BUF_MAX_PTR 0x20000UL
#define CUSE_ALLOC_UNIT_MAX 128 /* units */
#define CUSE_ALLOC_PAGES_MAX (((16UL * 1024UL * 1024UL) + PAGE_SIZE - 1) / PAGE_SIZE)
struct cuse_dev;
struct cuse_data_chunk {
unsigned long local_ptr;
unsigned long peer_ptr;
unsigned long length;
};
struct cuse_alloc_info {
unsigned long page_count;
unsigned long alloc_nr;
};
struct cuse_command {
struct cuse_dev *dev;
unsigned long fflags;
unsigned long per_file_handle;
unsigned long data_pointer;
unsigned long argument;
unsigned long command; /* see CUSE_CMD_XXX */
};
struct cuse_create_dev {
struct cuse_dev *dev;
uid_t user_id;
gid_t group_id;
int permissions;
char devname[80]; /* /dev/xxxxx */
};
/* Definition of internal IOCTLs for /dev/cuse */
#define CUSE_IOCTL_GET_COMMAND _IOR('C', 0, struct cuse_command)
#define CUSE_IOCTL_WRITE_DATA _IOW('C', 1, struct cuse_data_chunk)
#define CUSE_IOCTL_READ_DATA _IOW('C', 2, struct cuse_data_chunk)
#define CUSE_IOCTL_SYNC_COMMAND _IOW('C', 3, int)
#define CUSE_IOCTL_GET_SIG _IOR('C', 4, int)
#define CUSE_IOCTL_ALLOC_MEMORY _IOW('C', 5, struct cuse_alloc_info)
#define CUSE_IOCTL_FREE_MEMORY _IOW('C', 6, struct cuse_alloc_info)
#define CUSE_IOCTL_SET_PFH _IOW('C', 7, unsigned long)
#define CUSE_IOCTL_CREATE_DEV _IOW('C', 8, struct cuse_create_dev)
#define CUSE_IOCTL_DESTROY_DEV _IOW('C', 9, struct cuse_dev *)
#define CUSE_IOCTL_ALLOC_UNIT _IOR('C',10, int)
#define CUSE_IOCTL_FREE_UNIT _IOW('C',11, int)
#define CUSE_IOCTL_SELWAKEUP _IOW('C',12, int)
#define CUSE_IOCTL_ALLOC_UNIT_BY_ID _IOWR('C',13, int)
#define CUSE_IOCTL_FREE_UNIT_BY_ID _IOWR('C',14, int)
#endif /* _CUSE_IOCTL_H_ */

32
sys/modules/cuse/Makefile Normal file
View File

@ -0,0 +1,32 @@
# $FreeBSD$
#
# Copyright (c) 2010 Hans Petter Selasky. 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.
#
.PATH: ${.CURDIR}/../../fs/cuse
KMOD= cuse
SRCS= cuse.c device_if.h bus_if.h vnode_if.h opt_compat.h
.include <bsd.kmod.mk>