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" 36246290Sdchagin#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> 43246290Sdchagin#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> 48246290Sdchagin#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> 56161310Snetchild#ifdef COMPAT_LINUX32 57161310Snetchild#include <machine/../linux32/linux.h> 58161310Snetchild#else 59161310Snetchild#include <machine/../linux/linux.h> 60161310Snetchild#endif 6114331Speter 62246290Sdchagin#include <compat/linux/linux_dtrace.h> 63246290Sdchagin 6414331Speterconst char linux_emul_path[] = "/compat/linux"; 6514331Speter 66246290Sdchagin/* DTrace init */ 67246290SdchaginLIN_SDT_PROVIDER_DECLARE(LINUX_DTRACE); 68246290Sdchagin 69246290Sdchagin/** 70246290Sdchagin * DTrace probes in this module. 71246290Sdchagin */ 72246290SdchaginLIN_SDT_PROBE_DEFINE5(util, linux_emul_convpath, entry, "const char *", 73246290Sdchagin "enum uio_seg", "char **", "int", "int"); 74246290SdchaginLIN_SDT_PROBE_DEFINE1(util, linux_emul_convpath, return, "int"); 75246290SdchaginLIN_SDT_PROBE_DEFINE1(util, linux_msg, entry, "const char *"); 76246290SdchaginLIN_SDT_PROBE_DEFINE0(util, linux_msg, return); 77246290SdchaginLIN_SDT_PROBE_DEFINE2(util, linux_driver_get_name_dev, entry, "device_t", 78246290Sdchagin "const char *"); 79246290SdchaginLIN_SDT_PROBE_DEFINE0(util, linux_driver_get_name_dev, nullcall); 80246290SdchaginLIN_SDT_PROBE_DEFINE1(util, linux_driver_get_name_dev, return, "char *"); 81246290SdchaginLIN_SDT_PROBE_DEFINE3(util, linux_driver_get_major_minor, entry, "char *", 82246290Sdchagin "int *", "int *"); 83246290SdchaginLIN_SDT_PROBE_DEFINE0(util, linux_driver_get_major_minor, nullcall); 84246290SdchaginLIN_SDT_PROBE_DEFINE1(util, linux_driver_get_major_minor, notfound, "char *"); 85246290SdchaginLIN_SDT_PROBE_DEFINE3(util, linux_driver_get_major_minor, return, "int", 86246290Sdchagin "int", "int"); 87246290SdchaginLIN_SDT_PROBE_DEFINE0(util, linux_get_char_devices, entry); 88246290SdchaginLIN_SDT_PROBE_DEFINE1(util, linux_get_char_devices, return, "char *"); 89246290SdchaginLIN_SDT_PROBE_DEFINE1(util, linux_free_get_char_devices, entry, "char *"); 90246290SdchaginLIN_SDT_PROBE_DEFINE0(util, linux_free_get_char_devices, return); 91246290SdchaginLIN_SDT_PROBE_DEFINE1(util, linux_device_register_handler, entry, 92246290Sdchagin "struct linux_device_handler *"); 93246290SdchaginLIN_SDT_PROBE_DEFINE1(util, linux_device_register_handler, return, "int"); 94246290SdchaginLIN_SDT_PROBE_DEFINE1(util, linux_device_unregister_handler, entry, 95246290Sdchagin "struct linux_device_handler *"); 96246290SdchaginLIN_SDT_PROBE_DEFINE1(util, linux_device_unregister_handler, return, "int"); 97246290Sdchagin 9814331Speter/* 99166944Snetchild * Search an alternate path before passing pathname arguments on to 100166944Snetchild * system calls. Useful for keeping a separate 'emulation tree'. 10114331Speter * 102166944Snetchild * If cflag is set, we check if an attempt can be made to create the 103166944Snetchild * named file, i.e. we check if the directory it should be in exists. 10414331Speter */ 10514331Speterint 106246290Sdchaginlinux_emul_convpath(struct thread *td, const char *path, enum uio_seg pathseg, 107246290Sdchagin char **pbuf, int cflag, int dfd) 108102803Siedowse{ 109246290Sdchagin int retval; 11014331Speter 111246290Sdchagin LIN_SDT_PROBE5(util, linux_emul_convpath, entry, path, pathseg, pbuf, 112246290Sdchagin cflag, dfd); 113246290Sdchagin 114246290Sdchagin retval = kern_alternate_path(td, linux_emul_path, path, pathseg, pbuf, 115246290Sdchagin cflag, dfd); 116246290Sdchagin 117246290Sdchagin LIN_SDT_PROBE1(util, linux_emul_convpath, return, retval); 118246290Sdchagin return (retval); 11914331Speter} 120108541Salfred 121108541Salfredvoid 122108541Salfredlinux_msg(const struct thread *td, const char *fmt, ...) 123108541Salfred{ 124108541Salfred va_list ap; 125108541Salfred struct proc *p; 126108541Salfred 127246290Sdchagin LIN_SDT_PROBE1(util, linux_msg, entry, fmt); 128246290Sdchagin 129108541Salfred p = td->td_proc; 130108541Salfred printf("linux: pid %d (%s): ", (int)p->p_pid, p->p_comm); 131108541Salfred va_start(ap, fmt); 132108541Salfred vprintf(fmt, ap); 133108541Salfred va_end(ap); 134108541Salfred printf("\n"); 135246290Sdchagin 136246290Sdchagin LIN_SDT_PROBE0(util, linux_msg, return); 137108541Salfred} 138158311Sambrisko 139158311Sambriskostruct device_element 140158311Sambrisko{ 141158311Sambrisko TAILQ_ENTRY(device_element) list; 142158311Sambrisko struct linux_device_handler entry; 143158311Sambrisko}; 144158311Sambrisko 145158311Sambriskostatic TAILQ_HEAD(, device_element) devices = 146158311Sambrisko TAILQ_HEAD_INITIALIZER(devices); 147158311Sambrisko 148158311Sambriskostatic struct linux_device_handler null_handler = 149158311Sambrisko { "mem", "mem", "null", "null", 1, 3, 1}; 150158311Sambrisko 151158311SambriskoDATA_SET(linux_device_handler_set, null_handler); 152158311Sambrisko 153158311Sambriskochar * 154158311Sambriskolinux_driver_get_name_dev(device_t dev) 155158311Sambrisko{ 156158311Sambrisko struct device_element *de; 157158311Sambrisko const char *device_name = device_get_name(dev); 158158311Sambrisko 159246290Sdchagin LIN_SDT_PROBE2(util, linux_driver_get_name_dev, entry, dev, 160246290Sdchagin device_name); 161246290Sdchagin 162246290Sdchagin if (device_name == NULL) { 163246290Sdchagin LIN_SDT_PROBE0(util, linux_driver_get_name_dev, nullcall); 164246290Sdchagin LIN_SDT_PROBE1(util, linux_driver_get_name_dev, return, NULL); 165158311Sambrisko return NULL; 166246290Sdchagin } 167158311Sambrisko TAILQ_FOREACH(de, &devices, list) { 168246290Sdchagin if (strcmp(device_name, de->entry.bsd_driver_name) == 0) { 169246290Sdchagin LIN_SDT_PROBE1(util, linux_driver_get_name_dev, return, 170246290Sdchagin de->entry.linux_driver_name); 171158311Sambrisko return (de->entry.linux_driver_name); 172246290Sdchagin } 173158311Sambrisko } 174158311Sambrisko 175246290Sdchagin LIN_SDT_PROBE1(util, linux_driver_get_name_dev, return, NULL); 176158311Sambrisko return NULL; 177158311Sambrisko} 178158311Sambrisko 179158311Sambriskoint 180232405Sedlinux_driver_get_major_minor(const char *node, int *major, int *minor) 181158311Sambrisko{ 182158311Sambrisko struct device_element *de; 183158311Sambrisko 184246290Sdchagin LIN_SDT_PROBE3(util, linux_driver_get_major_minor, entry, node, major, 185246290Sdchagin minor); 186246290Sdchagin 187246290Sdchagin if (node == NULL || major == NULL || minor == NULL) { 188246290Sdchagin LIN_SDT_PROBE0(util, linux_driver_get_major_minor, nullcall); 189246290Sdchagin LIN_SDT_PROBE3(util, linux_driver_get_major_minor, return, 1, 190246290Sdchagin 0, 0); 191158311Sambrisko return 1; 192246290Sdchagin } 193179486Sed 194179486Sed if (strlen(node) > strlen("pts/") && 195179486Sed strncmp(node, "pts/", strlen("pts/")) == 0) { 196179486Sed unsigned long devno; 197179486Sed 198179486Sed /* 199179486Sed * Linux checks major and minors of the slave device 200179486Sed * to make sure it's a pty device, so let's make him 201179486Sed * believe it is. 202179486Sed */ 203179486Sed devno = strtoul(node + strlen("pts/"), NULL, 10); 204179486Sed *major = 136 + (devno / 256); 205179486Sed *minor = devno % 256; 206246290Sdchagin 207246290Sdchagin LIN_SDT_PROBE3(util, linux_driver_get_major_minor, return, 0, 208246290Sdchagin *major, *minor); 209179486Sed return 0; 210179486Sed } 211179486Sed 212158311Sambrisko TAILQ_FOREACH(de, &devices, list) { 213158311Sambrisko if (strcmp(node, de->entry.bsd_device_name) == 0) { 214158311Sambrisko *major = de->entry.linux_major; 215158311Sambrisko *minor = de->entry.linux_minor; 216246290Sdchagin 217246290Sdchagin LIN_SDT_PROBE3(util, linux_driver_get_major_minor, 218246290Sdchagin return, 0, *major, *minor); 219158311Sambrisko return 0; 220158311Sambrisko } 221158311Sambrisko } 222158311Sambrisko 223246290Sdchagin LIN_SDT_PROBE1(util, linux_driver_get_major_minor, notfound, node); 224246290Sdchagin LIN_SDT_PROBE3(util, linux_driver_get_major_minor, return, 1, 0, 0); 225158311Sambrisko return 1; 226158311Sambrisko} 227158311Sambrisko 228158311Sambriskochar * 229158311Sambriskolinux_get_char_devices() 230158311Sambrisko{ 231158311Sambrisko struct device_element *de; 232158311Sambrisko char *temp, *string, *last; 233158311Sambrisko char formated[256]; 234158311Sambrisko int current_size = 0, string_size = 1024; 235158311Sambrisko 236246290Sdchagin LIN_SDT_PROBE0(util, linux_get_char_devices, entry); 237246290Sdchagin 238184205Sdes string = malloc(string_size, M_LINUX, M_WAITOK); 239158311Sambrisko string[0] = '\000'; 240158311Sambrisko last = ""; 241158311Sambrisko TAILQ_FOREACH(de, &devices, list) { 242158311Sambrisko if (!de->entry.linux_char_device) 243158311Sambrisko continue; 244158311Sambrisko temp = string; 245158311Sambrisko if (strcmp(last, de->entry.bsd_driver_name) != 0) { 246158311Sambrisko last = de->entry.bsd_driver_name; 247158311Sambrisko 248158311Sambrisko snprintf(formated, sizeof(formated), "%3d %s\n", 249158311Sambrisko de->entry.linux_major, 250158311Sambrisko de->entry.linux_device_name); 251158311Sambrisko if (strlen(formated) + current_size 252158311Sambrisko >= string_size) { 253158311Sambrisko string_size *= 2; 254184205Sdes string = malloc(string_size, 255158311Sambrisko M_LINUX, M_WAITOK); 256158311Sambrisko bcopy(temp, string, current_size); 257184205Sdes free(temp, M_LINUX); 258158311Sambrisko } 259158311Sambrisko strcat(string, formated); 260158311Sambrisko current_size = strlen(string); 261158311Sambrisko } 262158311Sambrisko } 263158311Sambrisko 264246290Sdchagin LIN_SDT_PROBE1(util, linux_get_char_devices, return, string); 265158311Sambrisko return string; 266158311Sambrisko} 267158311Sambrisko 268158311Sambriskovoid 269158311Sambriskolinux_free_get_char_devices(char *string) 270158311Sambrisko{ 271246290Sdchagin 272246290Sdchagin LIN_SDT_PROBE1(util, linux_get_char_devices, entry, string); 273246290Sdchagin 274184205Sdes free(string, M_LINUX); 275246290Sdchagin 276246290Sdchagin LIN_SDT_PROBE0(util, linux_get_char_devices, return); 277158311Sambrisko} 278158311Sambrisko 279158311Sambriskostatic int linux_major_starting = 200; 280158311Sambrisko 281158311Sambriskoint 282158311Sambriskolinux_device_register_handler(struct linux_device_handler *d) 283158311Sambrisko{ 284158311Sambrisko struct device_element *de; 285158311Sambrisko 286246290Sdchagin LIN_SDT_PROBE1(util, linux_device_register_handler, entry, d); 287246290Sdchagin 288246290Sdchagin if (d == NULL) { 289246290Sdchagin LIN_SDT_PROBE1(util, linux_device_register_handler, return, 290246290Sdchagin EINVAL); 291158311Sambrisko return (EINVAL); 292246290Sdchagin } 293158311Sambrisko 294246290Sdchagin de = malloc(sizeof(*de), M_LINUX, M_WAITOK); 295158311Sambrisko if (d->linux_major < 0) { 296158311Sambrisko d->linux_major = linux_major_starting++; 297158311Sambrisko } 298158311Sambrisko bcopy(d, &de->entry, sizeof(*d)); 299158311Sambrisko 300158311Sambrisko /* Add the element to the list, sorted on span. */ 301158311Sambrisko TAILQ_INSERT_TAIL(&devices, de, list); 302158311Sambrisko 303246290Sdchagin LIN_SDT_PROBE1(util, linux_device_register_handler, return, 0); 304158311Sambrisko return (0); 305158311Sambrisko} 306158311Sambrisko 307158311Sambriskoint 308158311Sambriskolinux_device_unregister_handler(struct linux_device_handler *d) 309158311Sambrisko{ 310158311Sambrisko struct device_element *de; 311158311Sambrisko 312246290Sdchagin LIN_SDT_PROBE1(util, linux_device_unregister_handler, entry, d); 313246290Sdchagin 314246290Sdchagin if (d == NULL) { 315246290Sdchagin LIN_SDT_PROBE1(util, linux_device_unregister_handler, return, 316246290Sdchagin EINVAL); 317158311Sambrisko return (EINVAL); 318246290Sdchagin } 319158311Sambrisko 320158311Sambrisko TAILQ_FOREACH(de, &devices, list) { 321158311Sambrisko if (bcmp(d, &de->entry, sizeof(*d)) == 0) { 322158311Sambrisko TAILQ_REMOVE(&devices, de, list); 323184205Sdes free(de, M_LINUX); 324246290Sdchagin 325246290Sdchagin LIN_SDT_PROBE1(util, linux_device_unregister_handler, 326246290Sdchagin return, 0); 327158311Sambrisko return (0); 328158311Sambrisko } 329158311Sambrisko } 330158311Sambrisko 331246290Sdchagin LIN_SDT_PROBE1(util, linux_device_unregister_handler, return, EINVAL); 332158311Sambrisko return (EINVAL); 333158311Sambrisko} 334