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("$FreeBSD$"); 34116173Sobrien 35161310Snetchild#include "opt_compat.h" 36235063Snetchild#include "opt_kdtrace.h" 37161310Snetchild 3814331Speter#include <sys/param.h> 39158311Sambrisko#include <sys/bus.h> 40177785Skib#include <sys/fcntl.h> 41130959Sbde#include <sys/lock.h> 42130959Sbde#include <sys/malloc.h> 43235063Snetchild#include <sys/kernel.h> 44158311Sambrisko#include <sys/linker_set.h> 45130959Sbde#include <sys/mutex.h> 4614331Speter#include <sys/namei.h> 4714331Speter#include <sys/proc.h> 48235063Snetchild#include <sys/sdt.h> 49141472Sjhb#include <sys/syscallsubr.h> 50130959Sbde#include <sys/systm.h> 5114331Speter#include <sys/vnode.h> 5214331Speter 53108541Salfred#include <machine/stdarg.h> 54108541Salfred 5564913Smarcel#include <compat/linux/linux_util.h> 5614331Speter 57293527SdchaginMALLOC_DEFINE(M_LINUX, "linux", "Linux mode structures"); 58293546SdchaginMALLOC_DEFINE(M_EPOLL, "lepoll", "Linux events structures"); 59293532SdchaginMALLOC_DEFINE(M_FUTEX, "futex", "Linux futexes"); 60293532SdchaginMALLOC_DEFINE(M_FUTEX_WP, "futex wp", "Linux futex waiting proc"); 61235063Snetchild 6214331Speterconst char linux_emul_path[] = "/compat/linux"; 6314331Speter 6414331Speter/* 65166944Snetchild * Search an alternate path before passing pathname arguments on to 66166944Snetchild * system calls. Useful for keeping a separate 'emulation tree'. 6714331Speter * 68166944Snetchild * If cflag is set, we check if an attempt can be made to create the 69166944Snetchild * named file, i.e. we check if the directory it should be in exists. 7014331Speter */ 7114331Speterint 72235063Snetchildlinux_emul_convpath(struct thread *td, const char *path, enum uio_seg pathseg, 73235063Snetchild char **pbuf, int cflag, int dfd) 74102803Siedowse{ 75235063Snetchild int retval; 7614331Speter 77235063Snetchild retval = kern_alternate_path(td, linux_emul_path, path, pathseg, pbuf, 78235063Snetchild cflag, dfd); 79235063Snetchild 80235063Snetchild return (retval); 8114331Speter} 82108541Salfred 83108541Salfredvoid 84108541Salfredlinux_msg(const struct thread *td, const char *fmt, ...) 85108541Salfred{ 86108541Salfred va_list ap; 87108541Salfred struct proc *p; 88108541Salfred 89108541Salfred p = td->td_proc; 90108541Salfred printf("linux: pid %d (%s): ", (int)p->p_pid, p->p_comm); 91108541Salfred va_start(ap, fmt); 92108541Salfred vprintf(fmt, ap); 93108541Salfred va_end(ap); 94108541Salfred printf("\n"); 95108541Salfred} 96158311Sambrisko 97158311Sambriskostruct device_element 98158311Sambrisko{ 99158311Sambrisko TAILQ_ENTRY(device_element) list; 100158311Sambrisko struct linux_device_handler entry; 101158311Sambrisko}; 102158311Sambrisko 103158311Sambriskostatic TAILQ_HEAD(, device_element) devices = 104158311Sambrisko TAILQ_HEAD_INITIALIZER(devices); 105158311Sambrisko 106158311Sambriskostatic struct linux_device_handler null_handler = 107158311Sambrisko { "mem", "mem", "null", "null", 1, 3, 1}; 108158311Sambrisko 109158311SambriskoDATA_SET(linux_device_handler_set, null_handler); 110158311Sambrisko 111158311Sambriskochar * 112158311Sambriskolinux_driver_get_name_dev(device_t dev) 113158311Sambrisko{ 114158311Sambrisko struct device_element *de; 115158311Sambrisko const char *device_name = device_get_name(dev); 116158311Sambrisko 117293527Sdchagin if (device_name == NULL) 118158311Sambrisko return NULL; 119158311Sambrisko TAILQ_FOREACH(de, &devices, list) { 120293527Sdchagin if (strcmp(device_name, de->entry.bsd_driver_name) == 0) 121158311Sambrisko return (de->entry.linux_driver_name); 122158311Sambrisko } 123158311Sambrisko 124293527Sdchagin return (NULL); 125158311Sambrisko} 126158311Sambrisko 127158311Sambriskoint 128231378Sedlinux_driver_get_major_minor(const char *node, int *major, int *minor) 129158311Sambrisko{ 130158311Sambrisko struct device_element *de; 131158311Sambrisko 132293527Sdchagin if (node == NULL || major == NULL || minor == NULL) 133158311Sambrisko return 1; 134179486Sed 135179486Sed if (strlen(node) > strlen("pts/") && 136179486Sed strncmp(node, "pts/", strlen("pts/")) == 0) { 137179486Sed unsigned long devno; 138179486Sed 139179486Sed /* 140179486Sed * Linux checks major and minors of the slave device 141179486Sed * to make sure it's a pty device, so let's make him 142179486Sed * believe it is. 143179486Sed */ 144179486Sed devno = strtoul(node + strlen("pts/"), NULL, 10); 145179486Sed *major = 136 + (devno / 256); 146179486Sed *minor = devno % 256; 147235063Snetchild 148293527Sdchagin return (0); 149179486Sed } 150179486Sed 151158311Sambrisko TAILQ_FOREACH(de, &devices, list) { 152158311Sambrisko if (strcmp(node, de->entry.bsd_device_name) == 0) { 153158311Sambrisko *major = de->entry.linux_major; 154158311Sambrisko *minor = de->entry.linux_minor; 155293527Sdchagin return (0); 156158311Sambrisko } 157158311Sambrisko } 158158311Sambrisko 159293527Sdchagin return (1); 160158311Sambrisko} 161158311Sambrisko 162158311Sambriskochar * 163158311Sambriskolinux_get_char_devices() 164158311Sambrisko{ 165158311Sambrisko struct device_element *de; 166158311Sambrisko char *temp, *string, *last; 167158311Sambrisko char formated[256]; 168158311Sambrisko int current_size = 0, string_size = 1024; 169158311Sambrisko 170184205Sdes string = malloc(string_size, M_LINUX, M_WAITOK); 171158311Sambrisko string[0] = '\000'; 172158311Sambrisko last = ""; 173158311Sambrisko TAILQ_FOREACH(de, &devices, list) { 174158311Sambrisko if (!de->entry.linux_char_device) 175158311Sambrisko continue; 176158311Sambrisko temp = string; 177158311Sambrisko if (strcmp(last, de->entry.bsd_driver_name) != 0) { 178158311Sambrisko last = de->entry.bsd_driver_name; 179158311Sambrisko 180158311Sambrisko snprintf(formated, sizeof(formated), "%3d %s\n", 181158311Sambrisko de->entry.linux_major, 182158311Sambrisko de->entry.linux_device_name); 183158311Sambrisko if (strlen(formated) + current_size 184158311Sambrisko >= string_size) { 185158311Sambrisko string_size *= 2; 186184205Sdes string = malloc(string_size, 187158311Sambrisko M_LINUX, M_WAITOK); 188158311Sambrisko bcopy(temp, string, current_size); 189184205Sdes free(temp, M_LINUX); 190158311Sambrisko } 191158311Sambrisko strcat(string, formated); 192158311Sambrisko current_size = strlen(string); 193158311Sambrisko } 194158311Sambrisko } 195158311Sambrisko 196293527Sdchagin return (string); 197158311Sambrisko} 198158311Sambrisko 199158311Sambriskovoid 200158311Sambriskolinux_free_get_char_devices(char *string) 201158311Sambrisko{ 202235063Snetchild 203184205Sdes free(string, M_LINUX); 204158311Sambrisko} 205158311Sambrisko 206158311Sambriskostatic int linux_major_starting = 200; 207158311Sambrisko 208158311Sambriskoint 209158311Sambriskolinux_device_register_handler(struct linux_device_handler *d) 210158311Sambrisko{ 211158311Sambrisko struct device_element *de; 212158311Sambrisko 213293527Sdchagin if (d == NULL) 214158311Sambrisko return (EINVAL); 215158311Sambrisko 216235063Snetchild de = malloc(sizeof(*de), M_LINUX, M_WAITOK); 217158311Sambrisko if (d->linux_major < 0) { 218158311Sambrisko d->linux_major = linux_major_starting++; 219158311Sambrisko } 220158311Sambrisko bcopy(d, &de->entry, sizeof(*d)); 221158311Sambrisko 222158311Sambrisko /* Add the element to the list, sorted on span. */ 223158311Sambrisko TAILQ_INSERT_TAIL(&devices, de, list); 224158311Sambrisko 225158311Sambrisko return (0); 226158311Sambrisko} 227158311Sambrisko 228158311Sambriskoint 229158311Sambriskolinux_device_unregister_handler(struct linux_device_handler *d) 230158311Sambrisko{ 231158311Sambrisko struct device_element *de; 232158311Sambrisko 233293527Sdchagin if (d == NULL) 234158311Sambrisko return (EINVAL); 235158311Sambrisko 236158311Sambrisko TAILQ_FOREACH(de, &devices, list) { 237158311Sambrisko if (bcmp(d, &de->entry, sizeof(*d)) == 0) { 238158311Sambrisko TAILQ_REMOVE(&devices, de, list); 239184205Sdes free(de, M_LINUX); 240235063Snetchild 241158311Sambrisko return (0); 242158311Sambrisko } 243158311Sambrisko } 244158311Sambrisko 245158311Sambrisko return (EINVAL); 246158311Sambrisko} 247