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: stable/11/sys/compat/linux/linux_util.c 346819 2019-04-28 13:23:52Z dchagin $"); 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> 42235063Snetchild#include <sys/kernel.h> 43158311Sambrisko#include <sys/linker_set.h> 44130959Sbde#include <sys/mutex.h> 4514331Speter#include <sys/namei.h> 4614331Speter#include <sys/proc.h> 47235063Snetchild#include <sys/sdt.h> 48141472Sjhb#include <sys/syscallsubr.h> 49130959Sbde#include <sys/systm.h> 5014331Speter#include <sys/vnode.h> 5114331Speter 52108541Salfred#include <machine/stdarg.h> 53108541Salfred 5464913Smarcel#include <compat/linux/linux_util.h> 5514331Speter 56283421SdchaginMALLOC_DEFINE(M_LINUX, "linux", "Linux mode structures"); 57283441SdchaginMALLOC_DEFINE(M_EPOLL, "lepoll", "Linux events structures"); 58283427SdchaginMALLOC_DEFINE(M_FUTEX, "futex", "Linux futexes"); 59283427SdchaginMALLOC_DEFINE(M_FUTEX_WP, "futex wp", "Linux futex waiting proc"); 60235063Snetchild 6114331Speterconst char linux_emul_path[] = "/compat/linux"; 6214331Speter 6314331Speter/* 64166944Snetchild * Search an alternate path before passing pathname arguments on to 65166944Snetchild * system calls. Useful for keeping a separate 'emulation tree'. 6614331Speter * 67166944Snetchild * If cflag is set, we check if an attempt can be made to create the 68166944Snetchild * named file, i.e. we check if the directory it should be in exists. 6914331Speter */ 7014331Speterint 71235063Snetchildlinux_emul_convpath(struct thread *td, const char *path, enum uio_seg pathseg, 72235063Snetchild char **pbuf, int cflag, int dfd) 73102803Siedowse{ 74235063Snetchild int retval; 7514331Speter 76235063Snetchild retval = kern_alternate_path(td, linux_emul_path, path, pathseg, pbuf, 77235063Snetchild cflag, dfd); 78235063Snetchild 79235063Snetchild return (retval); 8014331Speter} 81108541Salfred 82108541Salfredvoid 83108541Salfredlinux_msg(const struct thread *td, const char *fmt, ...) 84108541Salfred{ 85108541Salfred va_list ap; 86108541Salfred struct proc *p; 87108541Salfred 88108541Salfred p = td->td_proc; 89108541Salfred printf("linux: pid %d (%s): ", (int)p->p_pid, p->p_comm); 90108541Salfred va_start(ap, fmt); 91108541Salfred vprintf(fmt, ap); 92108541Salfred va_end(ap); 93108541Salfred printf("\n"); 94108541Salfred} 95158311Sambrisko 96158311Sambriskostruct device_element 97158311Sambrisko{ 98158311Sambrisko TAILQ_ENTRY(device_element) list; 99158311Sambrisko struct linux_device_handler entry; 100158311Sambrisko}; 101158311Sambrisko 102158311Sambriskostatic TAILQ_HEAD(, device_element) devices = 103158311Sambrisko TAILQ_HEAD_INITIALIZER(devices); 104158311Sambrisko 105158311Sambriskostatic struct linux_device_handler null_handler = 106158311Sambrisko { "mem", "mem", "null", "null", 1, 3, 1}; 107158311Sambrisko 108158311SambriskoDATA_SET(linux_device_handler_set, null_handler); 109158311Sambrisko 110158311Sambriskochar * 111158311Sambriskolinux_driver_get_name_dev(device_t dev) 112158311Sambrisko{ 113158311Sambrisko struct device_element *de; 114158311Sambrisko const char *device_name = device_get_name(dev); 115158311Sambrisko 116283421Sdchagin if (device_name == NULL) 117346819Sdchagin return (NULL); 118158311Sambrisko TAILQ_FOREACH(de, &devices, list) { 119283421Sdchagin if (strcmp(device_name, de->entry.bsd_driver_name) == 0) 120158311Sambrisko return (de->entry.linux_driver_name); 121158311Sambrisko } 122158311Sambrisko 123283421Sdchagin return (NULL); 124158311Sambrisko} 125158311Sambrisko 126158311Sambriskoint 127231378Sedlinux_driver_get_major_minor(const char *node, int *major, int *minor) 128158311Sambrisko{ 129158311Sambrisko struct device_element *de; 130325015Stijl unsigned long devno; 131325015Stijl size_t sz; 132158311Sambrisko 133283421Sdchagin if (node == NULL || major == NULL || minor == NULL) 134346819Sdchagin return (1); 135179486Sed 136325015Stijl sz = sizeof("pts/") - 1; 137325015Stijl if (strncmp(node, "pts/", sz) == 0 && node[sz] != '\0') { 138179486Sed /* 139179486Sed * Linux checks major and minors of the slave device 140179486Sed * to make sure it's a pty device, so let's make him 141179486Sed * believe it is. 142179486Sed */ 143325015Stijl devno = strtoul(node + sz, NULL, 10); 144179486Sed *major = 136 + (devno / 256); 145179486Sed *minor = devno % 256; 146325015Stijl return (0); 147325015Stijl } 148235063Snetchild 149325015Stijl sz = sizeof("dri/card") - 1; 150325015Stijl if (strncmp(node, "dri/card", sz) == 0 && node[sz] != '\0') { 151325015Stijl devno = strtoul(node + sz, NULL, 10); 152325015Stijl *major = 226 + (devno / 256); 153325015Stijl *minor = devno % 256; 154283421Sdchagin return (0); 155179486Sed } 156325015Stijl sz = sizeof("dri/controlD") - 1; 157325015Stijl if (strncmp(node, "dri/controlD", sz) == 0 && node[sz] != '\0') { 158325015Stijl devno = strtoul(node + sz, NULL, 10); 159325015Stijl *major = 226 + (devno / 256); 160325015Stijl *minor = devno % 256; 161325015Stijl return (0); 162325015Stijl } 163325015Stijl sz = sizeof("dri/renderD") - 1; 164325015Stijl if (strncmp(node, "dri/renderD", sz) == 0 && node[sz] != '\0') { 165325015Stijl devno = strtoul(node + sz, NULL, 10); 166325015Stijl *major = 226 + (devno / 256); 167325015Stijl *minor = devno % 256; 168325015Stijl return (0); 169325015Stijl } 170325015Stijl sz = sizeof("drm/") - 1; 171325015Stijl if (strncmp(node, "drm/", sz) == 0 && node[sz] != '\0') { 172325015Stijl devno = strtoul(node + sz, NULL, 10); 173325015Stijl *major = 226 + (devno / 256); 174325015Stijl *minor = devno % 256; 175325015Stijl return (0); 176325015Stijl } 177179486Sed 178158311Sambrisko TAILQ_FOREACH(de, &devices, list) { 179158311Sambrisko if (strcmp(node, de->entry.bsd_device_name) == 0) { 180158311Sambrisko *major = de->entry.linux_major; 181158311Sambrisko *minor = de->entry.linux_minor; 182283421Sdchagin return (0); 183158311Sambrisko } 184158311Sambrisko } 185158311Sambrisko 186283421Sdchagin return (1); 187158311Sambrisko} 188158311Sambrisko 189158311Sambriskochar * 190158311Sambriskolinux_get_char_devices() 191158311Sambrisko{ 192158311Sambrisko struct device_element *de; 193158311Sambrisko char *temp, *string, *last; 194158311Sambrisko char formated[256]; 195158311Sambrisko int current_size = 0, string_size = 1024; 196158311Sambrisko 197184205Sdes string = malloc(string_size, M_LINUX, M_WAITOK); 198158311Sambrisko string[0] = '\000'; 199158311Sambrisko last = ""; 200158311Sambrisko TAILQ_FOREACH(de, &devices, list) { 201158311Sambrisko if (!de->entry.linux_char_device) 202158311Sambrisko continue; 203158311Sambrisko temp = string; 204158311Sambrisko if (strcmp(last, de->entry.bsd_driver_name) != 0) { 205158311Sambrisko last = de->entry.bsd_driver_name; 206158311Sambrisko 207158311Sambrisko snprintf(formated, sizeof(formated), "%3d %s\n", 208158311Sambrisko de->entry.linux_major, 209158311Sambrisko de->entry.linux_device_name); 210158311Sambrisko if (strlen(formated) + current_size 211158311Sambrisko >= string_size) { 212158311Sambrisko string_size *= 2; 213184205Sdes string = malloc(string_size, 214158311Sambrisko M_LINUX, M_WAITOK); 215158311Sambrisko bcopy(temp, string, current_size); 216184205Sdes free(temp, M_LINUX); 217158311Sambrisko } 218158311Sambrisko strcat(string, formated); 219158311Sambrisko current_size = strlen(string); 220158311Sambrisko } 221158311Sambrisko } 222158311Sambrisko 223283421Sdchagin return (string); 224158311Sambrisko} 225158311Sambrisko 226158311Sambriskovoid 227158311Sambriskolinux_free_get_char_devices(char *string) 228158311Sambrisko{ 229235063Snetchild 230184205Sdes free(string, M_LINUX); 231158311Sambrisko} 232158311Sambrisko 233158311Sambriskostatic int linux_major_starting = 200; 234158311Sambrisko 235158311Sambriskoint 236158311Sambriskolinux_device_register_handler(struct linux_device_handler *d) 237158311Sambrisko{ 238158311Sambrisko struct device_element *de; 239158311Sambrisko 240283421Sdchagin if (d == NULL) 241158311Sambrisko return (EINVAL); 242158311Sambrisko 243235063Snetchild de = malloc(sizeof(*de), M_LINUX, M_WAITOK); 244158311Sambrisko if (d->linux_major < 0) { 245158311Sambrisko d->linux_major = linux_major_starting++; 246158311Sambrisko } 247158311Sambrisko bcopy(d, &de->entry, sizeof(*d)); 248158311Sambrisko 249158311Sambrisko /* Add the element to the list, sorted on span. */ 250158311Sambrisko TAILQ_INSERT_TAIL(&devices, de, list); 251158311Sambrisko 252158311Sambrisko return (0); 253158311Sambrisko} 254158311Sambrisko 255158311Sambriskoint 256158311Sambriskolinux_device_unregister_handler(struct linux_device_handler *d) 257158311Sambrisko{ 258158311Sambrisko struct device_element *de; 259158311Sambrisko 260283421Sdchagin if (d == NULL) 261158311Sambrisko return (EINVAL); 262158311Sambrisko 263158311Sambrisko TAILQ_FOREACH(de, &devices, list) { 264158311Sambrisko if (bcmp(d, &de->entry, sizeof(*d)) == 0) { 265158311Sambrisko TAILQ_REMOVE(&devices, de, list); 266184205Sdes free(de, M_LINUX); 267235063Snetchild 268158311Sambrisko return (0); 269158311Sambrisko } 270158311Sambrisko } 271158311Sambrisko 272158311Sambrisko return (EINVAL); 273158311Sambrisko} 274