The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/compat/linux/linux_util.c

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    1 /*-
    2  * Copyright (c) 1994 Christos Zoulas
    3  * Copyright (c) 1995 Frank van der Linden
    4  * Copyright (c) 1995 Scott Bartram
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. The name of the author may not be used to endorse or promote products
   16  *    derived from this software without specific prior written permission
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   28  *
   29  *      from: svr4_util.c,v 1.5 1995/01/22 23:44:50 christos Exp
   30  */
   31 
   32 #include <sys/cdefs.h>
   33 __FBSDID("$FreeBSD: releng/7.4/sys/compat/linux/linux_util.c 166944 2007-02-24 16:49:25Z netchild $");
   34 
   35 #include "opt_compat.h"
   36 
   37 #include <sys/param.h>
   38 #include <sys/bus.h>
   39 #include <sys/lock.h>
   40 #include <sys/malloc.h>
   41 #include <sys/linker_set.h>
   42 #include <sys/mutex.h>
   43 #include <sys/namei.h>
   44 #include <sys/proc.h>
   45 #include <sys/syscallsubr.h>
   46 #include <sys/systm.h>
   47 #include <sys/vnode.h>
   48 
   49 #include <machine/stdarg.h>
   50 
   51 #include <compat/linux/linux_util.h>
   52 #ifdef COMPAT_LINUX32
   53 #include <machine/../linux32/linux.h>
   54 #else
   55 #include <machine/../linux/linux.h>
   56 #endif
   57 
   58 const char      linux_emul_path[] = "/compat/linux";
   59 
   60 /*
   61  * Search an alternate path before passing pathname arguments on to
   62  * system calls. Useful for keeping a separate 'emulation tree'.
   63  *
   64  * If cflag is set, we check if an attempt can be made to create the
   65  * named file, i.e. we check if the directory it should be in exists.
   66  */
   67 int
   68 linux_emul_convpath(td, path, pathseg, pbuf, cflag)
   69         struct thread    *td;
   70         char             *path;
   71         enum uio_seg      pathseg;
   72         char            **pbuf;
   73         int               cflag;
   74 {
   75 
   76         return (kern_alternate_path(td, linux_emul_path, path, pathseg, pbuf,
   77                 cflag));
   78 }
   79 
   80 void
   81 linux_msg(const struct thread *td, const char *fmt, ...)
   82 {
   83         va_list ap;
   84         struct proc *p;
   85 
   86         p = td->td_proc;
   87         printf("linux: pid %d (%s): ", (int)p->p_pid, p->p_comm);
   88         va_start(ap, fmt);
   89         vprintf(fmt, ap);
   90         va_end(ap);
   91         printf("\n");
   92 }
   93 
   94 struct device_element
   95 {
   96         TAILQ_ENTRY(device_element) list;
   97         struct linux_device_handler entry;
   98 };
   99 
  100 static TAILQ_HEAD(, device_element) devices =
  101         TAILQ_HEAD_INITIALIZER(devices);
  102 
  103 static struct linux_device_handler null_handler =
  104         { "mem", "mem", "null", "null", 1, 3, 1};
  105 
  106 DATA_SET(linux_device_handler_set, null_handler);
  107 
  108 char *
  109 linux_driver_get_name_dev(device_t dev)
  110 {
  111         struct device_element *de;
  112         const char *device_name = device_get_name(dev);
  113 
  114         if (device_name == NULL)
  115                 return NULL;
  116         TAILQ_FOREACH(de, &devices, list) {
  117                 if (strcmp(device_name, de->entry.bsd_driver_name) == 0)
  118                         return (de->entry.linux_driver_name);
  119         }
  120 
  121         return NULL;
  122 }
  123 
  124 int
  125 linux_driver_get_major_minor(char *node, int *major, int *minor)
  126 {
  127         struct device_element *de;
  128 
  129         if (node == NULL || major == NULL || minor == NULL)
  130                 return 1;
  131         TAILQ_FOREACH(de, &devices, list) {
  132                 if (strcmp(node, de->entry.bsd_device_name) == 0) {
  133                         *major = de->entry.linux_major;
  134                         *minor = de->entry.linux_minor;
  135                         return 0;
  136                 }
  137         }
  138 
  139         return 1;
  140 }
  141 
  142 char *
  143 linux_get_char_devices()
  144 {
  145         struct device_element *de;
  146         char *temp, *string, *last;
  147         char formated[256];
  148         int current_size = 0, string_size = 1024;
  149 
  150         MALLOC(string, char *, string_size, M_LINUX, M_WAITOK);
  151         string[0] = '\000';
  152         last = "";
  153         TAILQ_FOREACH(de, &devices, list) {
  154                 if (!de->entry.linux_char_device)
  155                         continue;
  156                 temp = string;
  157                 if (strcmp(last, de->entry.bsd_driver_name) != 0) {
  158                         last = de->entry.bsd_driver_name;
  159 
  160                         snprintf(formated, sizeof(formated), "%3d %s\n",
  161                                  de->entry.linux_major,
  162                                  de->entry.linux_device_name);
  163                         if (strlen(formated) + current_size
  164                             >= string_size) {
  165                                 string_size *= 2;
  166                                 MALLOC(string, char *, string_size,
  167                                     M_LINUX, M_WAITOK);
  168                                 bcopy(temp, string, current_size);
  169                                 FREE(temp, M_LINUX);
  170                         }
  171                         strcat(string, formated);
  172                         current_size = strlen(string);
  173                 }
  174         }
  175 
  176         return string;
  177 }
  178 
  179 void
  180 linux_free_get_char_devices(char *string)
  181 {
  182         FREE(string, M_LINUX);
  183 }
  184 
  185 static int linux_major_starting = 200;
  186 
  187 int
  188 linux_device_register_handler(struct linux_device_handler *d)
  189 {
  190         struct device_element *de;
  191 
  192         if (d == NULL)
  193                 return (EINVAL);
  194 
  195         MALLOC(de, struct device_element *, sizeof(*de),
  196             M_LINUX, M_WAITOK);
  197         if (d->linux_major < 0) {
  198                 d->linux_major = linux_major_starting++;
  199         }
  200         bcopy(d, &de->entry, sizeof(*d));
  201 
  202         /* Add the element to the list, sorted on span. */
  203         TAILQ_INSERT_TAIL(&devices, de, list);
  204 
  205         return (0);
  206 }
  207 
  208 int
  209 linux_device_unregister_handler(struct linux_device_handler *d)
  210 {
  211         struct device_element *de;
  212 
  213         if (d == NULL)
  214                 return (EINVAL);
  215 
  216         TAILQ_FOREACH(de, &devices, list) {
  217                 if (bcmp(d, &de->entry, sizeof(*d)) == 0) {
  218                         TAILQ_REMOVE(&devices, de, list);
  219                         FREE(de, M_LINUX);
  220                         return (0);
  221                 }
  222         }
  223 
  224         return (EINVAL);
  225 }

Cache object: 402ffe4ad347e875b8f41c0ded1e9f3e


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.