31b22ce017
Add back in a scheme to emulate old type major/minor numbers via hooks into
stat, linprocfs to return major/minors that Linux app's expect. Currently
only /dev/null is always registered. Drivers can register via the Linux
type shim similar to the ioctl shim but by using
linux_device_register_handler/linux_device_unregister_handler functions.
The structure is:
struct linux_device_handler {
char *bsd_driver_name;
char *linux_driver_name;
char *bsd_device_name;
char *linux_device_name;
int linux_major;
int linux_minor;
int linux_char_device;
};
Linprocfs uses this to display the major number of the driver. The
soon to be available linsysfs will use it to fill in the driver name.
Linux_stat uses it to translate the major/minor into Linux type values.
Note major numbers are dynamically assigned via passing in a -1 for
the major number so we don't need to keep track of them.
This is somewhat needed due to us switching to our devfs. MegaCli
will not run until I add in the linsysfs and mfi Linux compat changes.
Sponsored by: IronPort Systems
131 lines
4.0 KiB
C
131 lines
4.0 KiB
C
/*-
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* Copyright (c) 1994 Christos Zoulas
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* Copyright (c) 1995 Frank van der Linden
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* Copyright (c) 1995 Scott Bartram
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* from: svr4_util.h,v 1.5 1994/11/18 02:54:31 christos Exp
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* from: linux_util.h,v 1.2 1995/03/05 23:23:50 fvdl Exp
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* $FreeBSD$
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*/
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/*
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* This file is pretty much the same as Christos' svr4_util.h
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* (for now).
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*/
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#ifndef _LINUX_UTIL_H_
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#define _LINUX_UTIL_H_
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#include <vm/vm.h>
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#include <vm/vm_param.h>
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#include <vm/pmap.h>
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#include <machine/vmparam.h>
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#include <sys/exec.h>
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#include <sys/sysent.h>
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#include <sys/syslog.h>
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#include <sys/cdefs.h>
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#include <sys/uio.h>
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static __inline caddr_t stackgap_init(void);
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static __inline void *stackgap_alloc(caddr_t *, size_t);
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#define szsigcode (*(curthread->td_proc->p_sysent->sv_szsigcode))
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#define psstrings (curthread->td_proc->p_sysent->sv_psstrings)
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static __inline caddr_t
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stackgap_init()
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{
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return (caddr_t)(psstrings - szsigcode - SPARE_USRSPACE);
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}
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static __inline void *
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stackgap_alloc(sgp, sz)
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caddr_t *sgp;
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size_t sz;
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{
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void *p = (void *) *sgp;
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sz = ALIGN(sz);
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if (*sgp + sz > (caddr_t)(psstrings - szsigcode))
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return NULL;
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*sgp += sz;
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return p;
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}
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extern const char linux_emul_path[];
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int linux_emul_convpath(struct thread *, char *, enum uio_seg, char **, int);
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#define LCONVPATH(td, upath, pathp, i) \
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do { \
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int _error; \
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\
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_error = linux_emul_convpath(td, upath, UIO_USERSPACE, \
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pathp, i); \
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if (*(pathp) == NULL) \
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return (_error); \
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} while (0)
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#define LCONVPATHEXIST(td, upath, pathp) LCONVPATH(td, upath, pathp, 0)
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#define LCONVPATHCREAT(td, upath, pathp) LCONVPATH(td, upath, pathp, 1)
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#define LFREEPATH(path) free(path, M_TEMP)
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#define DUMMY(s) \
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int \
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linux_ ## s(struct thread *td, struct linux_ ## s ## _args *args) \
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{ \
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static pid_t pid; \
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\
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if (pid != td->td_proc->p_pid) { \
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linux_msg(td, "syscall %s not implemented", #s); \
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pid = td->td_proc->p_pid; \
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}; \
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return (ENOSYS); \
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} \
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struct __hack
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void linux_msg(const struct thread *td, const char *fmt, ...)
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__printflike(2, 3);
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struct linux_device_handler {
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char *bsd_driver_name;
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char *linux_driver_name;
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char *bsd_device_name;
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char *linux_device_name;
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int linux_major;
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int linux_minor;
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int linux_char_device;
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};
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int linux_device_register_handler(struct linux_device_handler *h);
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int linux_device_unregister_handler(struct linux_device_handler *h);
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char *linux_driver_get_name_dev(device_t dev);
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int linux_driver_get_major_minor(char *node, int *major, int *minor);
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char *linux_get_char_devices(void);
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void linux_free_get_char_devices(char *string);
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#endif /* !_LINUX_UTIL_H_ */
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