linux_util.c revision 177785
1139743Simp/*- 214331Speter * Copyright (c) 1994 Christos Zoulas 314331Speter * Copyright (c) 1995 Frank van der Linden 414331Speter * Copyright (c) 1995 Scott Bartram 514331Speter * All rights reserved. 614331Speter * 714331Speter * Redistribution and use in source and binary forms, with or without 814331Speter * modification, are permitted provided that the following conditions 914331Speter * are met: 1014331Speter * 1. Redistributions of source code must retain the above copyright 1114331Speter * notice, this list of conditions and the following disclaimer. 1214331Speter * 2. Redistributions in binary form must reproduce the above copyright 1314331Speter * notice, this list of conditions and the following disclaimer in the 1414331Speter * documentation and/or other materials provided with the distribution. 1514331Speter * 3. The name of the author may not be used to endorse or promote products 1614331Speter * derived from this software without specific prior written permission 1714331Speter * 1814331Speter * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 1914331Speter * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 2014331Speter * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 2114331Speter * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 2214331Speter * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 2314331Speter * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2414331Speter * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2514331Speter * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2614331Speter * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 2714331Speter * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2814331Speter * 2914331Speter * from: svr4_util.c,v 1.5 1995/01/22 23:44:50 christos Exp 3014331Speter */ 3114331Speter 32116173Sobrien#include <sys/cdefs.h> 33116173Sobrien__FBSDID("$FreeBSD: head/sys/compat/linux/linux_util.c 177785 2008-03-31 12:01:21Z kib $"); 34116173Sobrien 35161310Snetchild#include "opt_compat.h" 36161310Snetchild 3714331Speter#include <sys/param.h> 38158311Sambrisko#include <sys/bus.h> 39177785Skib#include <sys/fcntl.h> 40130959Sbde#include <sys/lock.h> 41130959Sbde#include <sys/malloc.h> 42158311Sambrisko#include <sys/linker_set.h> 43130959Sbde#include <sys/mutex.h> 4414331Speter#include <sys/namei.h> 4514331Speter#include <sys/proc.h> 46141472Sjhb#include <sys/syscallsubr.h> 47130959Sbde#include <sys/systm.h> 4814331Speter#include <sys/vnode.h> 4914331Speter 50108541Salfred#include <machine/stdarg.h> 51108541Salfred 5264913Smarcel#include <compat/linux/linux_util.h> 53161310Snetchild#ifdef COMPAT_LINUX32 54161310Snetchild#include <machine/../linux32/linux.h> 55161310Snetchild#else 56161310Snetchild#include <machine/../linux/linux.h> 57161310Snetchild#endif 5814331Speter 5914331Speterconst char linux_emul_path[] = "/compat/linux"; 6014331Speter 6114331Speter/* 62166944Snetchild * Search an alternate path before passing pathname arguments on to 63166944Snetchild * system calls. Useful for keeping a separate 'emulation tree'. 6414331Speter * 65166944Snetchild * If cflag is set, we check if an attempt can be made to create the 66166944Snetchild * named file, i.e. we check if the directory it should be in exists. 6714331Speter */ 6814331Speterint 69102803Siedowselinux_emul_convpath(td, path, pathseg, pbuf, cflag) 70102803Siedowse struct thread *td; 71102803Siedowse char *path; 72102803Siedowse enum uio_seg pathseg; 73102803Siedowse char **pbuf; 74102803Siedowse int cflag; 75102803Siedowse{ 7614331Speter 77141472Sjhb return (kern_alternate_path(td, linux_emul_path, path, pathseg, pbuf, 78141472Sjhb cflag)); 7914331Speter} 80108541Salfred 81108541Salfredvoid 82108541Salfredlinux_msg(const struct thread *td, const char *fmt, ...) 83108541Salfred{ 84108541Salfred va_list ap; 85108541Salfred struct proc *p; 86108541Salfred 87108541Salfred p = td->td_proc; 88108541Salfred printf("linux: pid %d (%s): ", (int)p->p_pid, p->p_comm); 89108541Salfred va_start(ap, fmt); 90108541Salfred vprintf(fmt, ap); 91108541Salfred va_end(ap); 92108541Salfred printf("\n"); 93108541Salfred} 94158311Sambrisko 95158311Sambriskostruct device_element 96158311Sambrisko{ 97158311Sambrisko TAILQ_ENTRY(device_element) list; 98158311Sambrisko struct linux_device_handler entry; 99158311Sambrisko}; 100158311Sambrisko 101158311Sambriskostatic TAILQ_HEAD(, device_element) devices = 102158311Sambrisko TAILQ_HEAD_INITIALIZER(devices); 103158311Sambrisko 104158311Sambriskostatic struct linux_device_handler null_handler = 105158311Sambrisko { "mem", "mem", "null", "null", 1, 3, 1}; 106158311Sambrisko 107158311SambriskoDATA_SET(linux_device_handler_set, null_handler); 108158311Sambrisko 109158311Sambriskochar * 110158311Sambriskolinux_driver_get_name_dev(device_t dev) 111158311Sambrisko{ 112158311Sambrisko struct device_element *de; 113158311Sambrisko const char *device_name = device_get_name(dev); 114158311Sambrisko 115158311Sambrisko if (device_name == NULL) 116158311Sambrisko return NULL; 117158311Sambrisko TAILQ_FOREACH(de, &devices, list) { 118158311Sambrisko if (strcmp(device_name, de->entry.bsd_driver_name) == 0) 119158311Sambrisko return (de->entry.linux_driver_name); 120158311Sambrisko } 121158311Sambrisko 122158311Sambrisko return NULL; 123158311Sambrisko} 124158311Sambrisko 125158311Sambriskoint 126158311Sambriskolinux_driver_get_major_minor(char *node, int *major, int *minor) 127158311Sambrisko{ 128158311Sambrisko struct device_element *de; 129158311Sambrisko 130158311Sambrisko if (node == NULL || major == NULL || minor == NULL) 131158311Sambrisko return 1; 132158311Sambrisko TAILQ_FOREACH(de, &devices, list) { 133158311Sambrisko if (strcmp(node, de->entry.bsd_device_name) == 0) { 134158311Sambrisko *major = de->entry.linux_major; 135158311Sambrisko *minor = de->entry.linux_minor; 136158311Sambrisko return 0; 137158311Sambrisko } 138158311Sambrisko } 139158311Sambrisko 140158311Sambrisko return 1; 141158311Sambrisko} 142158311Sambrisko 143158311Sambriskochar * 144158311Sambriskolinux_get_char_devices() 145158311Sambrisko{ 146158311Sambrisko struct device_element *de; 147158311Sambrisko char *temp, *string, *last; 148158311Sambrisko char formated[256]; 149158311Sambrisko int current_size = 0, string_size = 1024; 150158311Sambrisko 151158311Sambrisko MALLOC(string, char *, string_size, M_LINUX, M_WAITOK); 152158311Sambrisko string[0] = '\000'; 153158311Sambrisko last = ""; 154158311Sambrisko TAILQ_FOREACH(de, &devices, list) { 155158311Sambrisko if (!de->entry.linux_char_device) 156158311Sambrisko continue; 157158311Sambrisko temp = string; 158158311Sambrisko if (strcmp(last, de->entry.bsd_driver_name) != 0) { 159158311Sambrisko last = de->entry.bsd_driver_name; 160158311Sambrisko 161158311Sambrisko snprintf(formated, sizeof(formated), "%3d %s\n", 162158311Sambrisko de->entry.linux_major, 163158311Sambrisko de->entry.linux_device_name); 164158311Sambrisko if (strlen(formated) + current_size 165158311Sambrisko >= string_size) { 166158311Sambrisko string_size *= 2; 167158311Sambrisko MALLOC(string, char *, string_size, 168158311Sambrisko M_LINUX, M_WAITOK); 169158311Sambrisko bcopy(temp, string, current_size); 170158311Sambrisko FREE(temp, M_LINUX); 171158311Sambrisko } 172158311Sambrisko strcat(string, formated); 173158311Sambrisko current_size = strlen(string); 174158311Sambrisko } 175158311Sambrisko } 176158311Sambrisko 177158311Sambrisko return string; 178158311Sambrisko} 179158311Sambrisko 180158311Sambriskovoid 181158311Sambriskolinux_free_get_char_devices(char *string) 182158311Sambrisko{ 183158311Sambrisko FREE(string, M_LINUX); 184158311Sambrisko} 185158311Sambrisko 186158311Sambriskostatic int linux_major_starting = 200; 187158311Sambrisko 188158311Sambriskoint 189158311Sambriskolinux_device_register_handler(struct linux_device_handler *d) 190158311Sambrisko{ 191158311Sambrisko struct device_element *de; 192158311Sambrisko 193158311Sambrisko if (d == NULL) 194158311Sambrisko return (EINVAL); 195158311Sambrisko 196158311Sambrisko MALLOC(de, struct device_element *, sizeof(*de), 197158311Sambrisko M_LINUX, M_WAITOK); 198158311Sambrisko if (d->linux_major < 0) { 199158311Sambrisko d->linux_major = linux_major_starting++; 200158311Sambrisko } 201158311Sambrisko bcopy(d, &de->entry, sizeof(*d)); 202158311Sambrisko 203158311Sambrisko /* Add the element to the list, sorted on span. */ 204158311Sambrisko TAILQ_INSERT_TAIL(&devices, de, list); 205158311Sambrisko 206158311Sambrisko return (0); 207158311Sambrisko} 208158311Sambrisko 209158311Sambriskoint 210158311Sambriskolinux_device_unregister_handler(struct linux_device_handler *d) 211158311Sambrisko{ 212158311Sambrisko struct device_element *de; 213158311Sambrisko 214158311Sambrisko if (d == NULL) 215158311Sambrisko return (EINVAL); 216158311Sambrisko 217158311Sambrisko TAILQ_FOREACH(de, &devices, list) { 218158311Sambrisko if (bcmp(d, &de->entry, sizeof(*d)) == 0) { 219158311Sambrisko TAILQ_REMOVE(&devices, de, list); 220158311Sambrisko FREE(de, M_LINUX); 221158311Sambrisko return (0); 222158311Sambrisko } 223158311Sambrisko } 224158311Sambrisko 225158311Sambrisko return (EINVAL); 226158311Sambrisko} 227