1898b0535SWarner Losh /*- 27f2d13d6SPedro F. Giffuni * SPDX-License-Identifier: BSD-3-Clause 37f2d13d6SPedro F. Giffuni * 4d66a5066SPeter Wemm * Copyright (c) 1994 Christos Zoulas 5d66a5066SPeter Wemm * Copyright (c) 1995 Frank van der Linden 6d66a5066SPeter Wemm * Copyright (c) 1995 Scott Bartram 7d66a5066SPeter Wemm * All rights reserved. 8d66a5066SPeter Wemm * 9d66a5066SPeter Wemm * Redistribution and use in source and binary forms, with or without 10d66a5066SPeter Wemm * modification, are permitted provided that the following conditions 11d66a5066SPeter Wemm * are met: 12d66a5066SPeter Wemm * 1. Redistributions of source code must retain the above copyright 13d66a5066SPeter Wemm * notice, this list of conditions and the following disclaimer. 14d66a5066SPeter Wemm * 2. Redistributions in binary form must reproduce the above copyright 15d66a5066SPeter Wemm * notice, this list of conditions and the following disclaimer in the 16d66a5066SPeter Wemm * documentation and/or other materials provided with the distribution. 17d66a5066SPeter Wemm * 3. The name of the author may not be used to endorse or promote products 18d66a5066SPeter Wemm * derived from this software without specific prior written permission 19d66a5066SPeter Wemm * 20d66a5066SPeter Wemm * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21d66a5066SPeter Wemm * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22d66a5066SPeter Wemm * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23d66a5066SPeter Wemm * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24d66a5066SPeter Wemm * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25d66a5066SPeter Wemm * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26d66a5066SPeter Wemm * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27d66a5066SPeter Wemm * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28d66a5066SPeter Wemm * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29d66a5066SPeter Wemm * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30d66a5066SPeter Wemm * 31d66a5066SPeter Wemm * from: svr4_util.c,v 1.5 1995/01/22 23:44:50 christos Exp 32d66a5066SPeter Wemm */ 33d66a5066SPeter Wemm 3416dbc7f2SDavid E. O'Brien #include <sys/cdefs.h> 3516dbc7f2SDavid E. O'Brien __FBSDID("$FreeBSD$"); 3616dbc7f2SDavid E. O'Brien 37d66a5066SPeter Wemm #include <sys/param.h> 38060e4882SDoug Ambrisko #include <sys/bus.h> 391a34e9faSEdward Tomasz Napierala #include <sys/conf.h> 4057b4252eSKonstantin Belousov #include <sys/fcntl.h> 41d4364109SBruce Evans #include <sys/lock.h> 42d4364109SBruce Evans #include <sys/malloc.h> 4319e252baSAlexander Leidinger #include <sys/kernel.h> 44060e4882SDoug Ambrisko #include <sys/linker_set.h> 45d4364109SBruce Evans #include <sys/mutex.h> 46d66a5066SPeter Wemm #include <sys/namei.h> 47d66a5066SPeter Wemm #include <sys/proc.h> 4819e252baSAlexander Leidinger #include <sys/sdt.h> 4925771ec2SJohn Baldwin #include <sys/syscallsubr.h> 50b5f20658SEdward Tomasz Napierala #include <sys/sysctl.h> 51d4364109SBruce Evans #include <sys/systm.h> 52d66a5066SPeter Wemm #include <sys/vnode.h> 53d66a5066SPeter Wemm 54e15583ceSAlfred Perlstein #include <machine/stdarg.h> 55e15583ceSAlfred Perlstein 56b5f20658SEdward Tomasz Napierala #include <compat/linux/linux_mib.h> 57ac951e62SMarcel Moolenaar #include <compat/linux/linux_util.h> 58762e6b85SEivind Eklund 5967d39748SDmitry Chagin MALLOC_DEFINE(M_LINUX, "linux", "Linux mode structures"); 60e16fe1c7SDmitry Chagin MALLOC_DEFINE(M_EPOLL, "lepoll", "Linux events structures"); 61e0d3ea8cSDmitry Chagin MALLOC_DEFINE(M_FUTEX, "futex", "Linux futexes"); 62e0d3ea8cSDmitry Chagin MALLOC_DEFINE(M_FUTEX_WP, "futex wp", "Linux futex waiting proc"); 6319e252baSAlexander Leidinger 64b5f20658SEdward Tomasz Napierala char linux_emul_path[MAXPATHLEN] = "/compat/linux"; 65b5f20658SEdward Tomasz Napierala 66b5f20658SEdward Tomasz Napierala SYSCTL_STRING(_compat_linux, OID_AUTO, emul_path, CTLFLAG_RWTUN, 67b5f20658SEdward Tomasz Napierala linux_emul_path, sizeof(linux_emul_path), 68b5f20658SEdward Tomasz Napierala "Linux runtime environment path"); 69d66a5066SPeter Wemm 70d66a5066SPeter Wemm /* 71802e08a3SAlexander Leidinger * Search an alternate path before passing pathname arguments on to 72802e08a3SAlexander Leidinger * system calls. Useful for keeping a separate 'emulation tree'. 73d66a5066SPeter Wemm * 74802e08a3SAlexander Leidinger * If cflag is set, we check if an attempt can be made to create the 75802e08a3SAlexander Leidinger * named file, i.e. we check if the directory it should be in exists. 76d66a5066SPeter Wemm */ 77d66a5066SPeter Wemm int 7819e252baSAlexander Leidinger linux_emul_convpath(struct thread *td, const char *path, enum uio_seg pathseg, 7919e252baSAlexander Leidinger char **pbuf, int cflag, int dfd) 80ff766321SIan Dowse { 8119e252baSAlexander Leidinger int retval; 82d66a5066SPeter Wemm 8319e252baSAlexander Leidinger retval = kern_alternate_path(td, linux_emul_path, path, pathseg, pbuf, 8419e252baSAlexander Leidinger cflag, dfd); 8519e252baSAlexander Leidinger 8619e252baSAlexander Leidinger return (retval); 87d66a5066SPeter Wemm } 88e15583ceSAlfred Perlstein 89e15583ceSAlfred Perlstein void 90e15583ceSAlfred Perlstein linux_msg(const struct thread *td, const char *fmt, ...) 91e15583ceSAlfred Perlstein { 92e15583ceSAlfred Perlstein va_list ap; 93e15583ceSAlfred Perlstein struct proc *p; 94e15583ceSAlfred Perlstein 95462171d9SEdward Tomasz Napierala if (linux_debug == 0) 96462171d9SEdward Tomasz Napierala return; 97462171d9SEdward Tomasz Napierala 98e15583ceSAlfred Perlstein p = td->td_proc; 99e15583ceSAlfred Perlstein printf("linux: pid %d (%s): ", (int)p->p_pid, p->p_comm); 100e15583ceSAlfred Perlstein va_start(ap, fmt); 101e15583ceSAlfred Perlstein vprintf(fmt, ap); 102e15583ceSAlfred Perlstein va_end(ap); 103e15583ceSAlfred Perlstein printf("\n"); 104e15583ceSAlfred Perlstein } 105060e4882SDoug Ambrisko 106060e4882SDoug Ambrisko struct device_element 107060e4882SDoug Ambrisko { 108060e4882SDoug Ambrisko TAILQ_ENTRY(device_element) list; 109060e4882SDoug Ambrisko struct linux_device_handler entry; 110060e4882SDoug Ambrisko }; 111060e4882SDoug Ambrisko 112060e4882SDoug Ambrisko static TAILQ_HEAD(, device_element) devices = 113060e4882SDoug Ambrisko TAILQ_HEAD_INITIALIZER(devices); 114060e4882SDoug Ambrisko 115060e4882SDoug Ambrisko static struct linux_device_handler null_handler = 116060e4882SDoug Ambrisko { "mem", "mem", "null", "null", 1, 3, 1}; 117060e4882SDoug Ambrisko 118060e4882SDoug Ambrisko DATA_SET(linux_device_handler_set, null_handler); 119060e4882SDoug Ambrisko 120060e4882SDoug Ambrisko char * 121060e4882SDoug Ambrisko linux_driver_get_name_dev(device_t dev) 122060e4882SDoug Ambrisko { 123060e4882SDoug Ambrisko struct device_element *de; 124060e4882SDoug Ambrisko const char *device_name = device_get_name(dev); 125060e4882SDoug Ambrisko 12667d39748SDmitry Chagin if (device_name == NULL) 127340f4a8dSEd Maste return (NULL); 128060e4882SDoug Ambrisko TAILQ_FOREACH(de, &devices, list) { 12967d39748SDmitry Chagin if (strcmp(device_name, de->entry.bsd_driver_name) == 0) 130060e4882SDoug Ambrisko return (de->entry.linux_driver_name); 131060e4882SDoug Ambrisko } 132060e4882SDoug Ambrisko 13367d39748SDmitry Chagin return (NULL); 134060e4882SDoug Ambrisko } 135060e4882SDoug Ambrisko 136060e4882SDoug Ambrisko int 1377870adb6SEd Schouten linux_driver_get_major_minor(const char *node, int *major, int *minor) 138060e4882SDoug Ambrisko { 139060e4882SDoug Ambrisko struct device_element *de; 1402d347b2eSConrad Meyer unsigned long devno; 141f3792e07STijl Coosemans size_t sz; 142060e4882SDoug Ambrisko 14367d39748SDmitry Chagin if (node == NULL || major == NULL || minor == NULL) 144340f4a8dSEd Maste return (1); 145a147e6caSEd Schouten 146f3792e07STijl Coosemans sz = sizeof("pts/") - 1; 147f3792e07STijl Coosemans if (strncmp(node, "pts/", sz) == 0 && node[sz] != '\0') { 148a147e6caSEd Schouten /* 149a147e6caSEd Schouten * Linux checks major and minors of the slave device 150a147e6caSEd Schouten * to make sure it's a pty device, so let's make him 151a147e6caSEd Schouten * believe it is. 152a147e6caSEd Schouten */ 153f3792e07STijl Coosemans devno = strtoul(node + sz, NULL, 10); 154a147e6caSEd Schouten *major = 136 + (devno / 256); 155a147e6caSEd Schouten *minor = devno % 256; 15667d39748SDmitry Chagin return (0); 157a147e6caSEd Schouten } 158a147e6caSEd Schouten 159834804f3STijl Coosemans sz = sizeof("dri/card") - 1; 160834804f3STijl Coosemans if (strncmp(node, "dri/card", sz) == 0 && node[sz] != '\0') { 161834804f3STijl Coosemans devno = strtoul(node + sz, NULL, 10); 162834804f3STijl Coosemans *major = 226 + (devno / 256); 163834804f3STijl Coosemans *minor = devno % 256; 164834804f3STijl Coosemans return (0); 165834804f3STijl Coosemans } 166834804f3STijl Coosemans sz = sizeof("dri/controlD") - 1; 167834804f3STijl Coosemans if (strncmp(node, "dri/controlD", sz) == 0 && node[sz] != '\0') { 168834804f3STijl Coosemans devno = strtoul(node + sz, NULL, 10); 169834804f3STijl Coosemans *major = 226 + (devno / 256); 170834804f3STijl Coosemans *minor = devno % 256; 171834804f3STijl Coosemans return (0); 172834804f3STijl Coosemans } 173834804f3STijl Coosemans sz = sizeof("dri/renderD") - 1; 174834804f3STijl Coosemans if (strncmp(node, "dri/renderD", sz) == 0 && node[sz] != '\0') { 175834804f3STijl Coosemans devno = strtoul(node + sz, NULL, 10); 176834804f3STijl Coosemans *major = 226 + (devno / 256); 177834804f3STijl Coosemans *minor = devno % 256; 178834804f3STijl Coosemans return (0); 179834804f3STijl Coosemans } 180f3792e07STijl Coosemans sz = sizeof("drm/") - 1; 181f3792e07STijl Coosemans if (strncmp(node, "drm/", sz) == 0 && node[sz] != '\0') { 182f3792e07STijl Coosemans devno = strtoul(node + sz, NULL, 10); 1832d347b2eSConrad Meyer *major = 226 + (devno / 256); 1842d347b2eSConrad Meyer *minor = devno % 256; 1852d347b2eSConrad Meyer return (0); 1862d347b2eSConrad Meyer } 1872d347b2eSConrad Meyer 188060e4882SDoug Ambrisko TAILQ_FOREACH(de, &devices, list) { 189060e4882SDoug Ambrisko if (strcmp(node, de->entry.bsd_device_name) == 0) { 190060e4882SDoug Ambrisko *major = de->entry.linux_major; 191060e4882SDoug Ambrisko *minor = de->entry.linux_minor; 19267d39748SDmitry Chagin return (0); 193060e4882SDoug Ambrisko } 194060e4882SDoug Ambrisko } 195060e4882SDoug Ambrisko 19667d39748SDmitry Chagin return (1); 197060e4882SDoug Ambrisko } 198060e4882SDoug Ambrisko 1991a34e9faSEdward Tomasz Napierala int 2001a34e9faSEdward Tomasz Napierala linux_vn_get_major_minor(const struct vnode *vp, int *major, int *minor) 2011a34e9faSEdward Tomasz Napierala { 2021a34e9faSEdward Tomasz Napierala int error; 2031a34e9faSEdward Tomasz Napierala 2041a34e9faSEdward Tomasz Napierala if (vp->v_type != VCHR) 2051a34e9faSEdward Tomasz Napierala return (ENOTBLK); 2061a34e9faSEdward Tomasz Napierala dev_lock(); 2071a34e9faSEdward Tomasz Napierala if (vp->v_rdev == NULL) { 2081a34e9faSEdward Tomasz Napierala dev_unlock(); 2091a34e9faSEdward Tomasz Napierala return (ENXIO); 2101a34e9faSEdward Tomasz Napierala } 2111a34e9faSEdward Tomasz Napierala error = linux_driver_get_major_minor(devtoname(vp->v_rdev), 2121a34e9faSEdward Tomasz Napierala major, minor); 2131a34e9faSEdward Tomasz Napierala dev_unlock(); 2141a34e9faSEdward Tomasz Napierala return (error); 2151a34e9faSEdward Tomasz Napierala } 2161a34e9faSEdward Tomasz Napierala 217060e4882SDoug Ambrisko char * 218060e4882SDoug Ambrisko linux_get_char_devices() 219060e4882SDoug Ambrisko { 220060e4882SDoug Ambrisko struct device_element *de; 221060e4882SDoug Ambrisko char *temp, *string, *last; 222060e4882SDoug Ambrisko char formated[256]; 223060e4882SDoug Ambrisko int current_size = 0, string_size = 1024; 224060e4882SDoug Ambrisko 2251ede983cSDag-Erling Smørgrav string = malloc(string_size, M_LINUX, M_WAITOK); 226060e4882SDoug Ambrisko string[0] = '\000'; 227060e4882SDoug Ambrisko last = ""; 228060e4882SDoug Ambrisko TAILQ_FOREACH(de, &devices, list) { 229060e4882SDoug Ambrisko if (!de->entry.linux_char_device) 230060e4882SDoug Ambrisko continue; 231060e4882SDoug Ambrisko temp = string; 232060e4882SDoug Ambrisko if (strcmp(last, de->entry.bsd_driver_name) != 0) { 233060e4882SDoug Ambrisko last = de->entry.bsd_driver_name; 234060e4882SDoug Ambrisko 235060e4882SDoug Ambrisko snprintf(formated, sizeof(formated), "%3d %s\n", 236060e4882SDoug Ambrisko de->entry.linux_major, 237060e4882SDoug Ambrisko de->entry.linux_device_name); 238060e4882SDoug Ambrisko if (strlen(formated) + current_size 239060e4882SDoug Ambrisko >= string_size) { 240060e4882SDoug Ambrisko string_size *= 2; 2411ede983cSDag-Erling Smørgrav string = malloc(string_size, 242060e4882SDoug Ambrisko M_LINUX, M_WAITOK); 243060e4882SDoug Ambrisko bcopy(temp, string, current_size); 2441ede983cSDag-Erling Smørgrav free(temp, M_LINUX); 245060e4882SDoug Ambrisko } 246060e4882SDoug Ambrisko strcat(string, formated); 247060e4882SDoug Ambrisko current_size = strlen(string); 248060e4882SDoug Ambrisko } 249060e4882SDoug Ambrisko } 250060e4882SDoug Ambrisko 25167d39748SDmitry Chagin return (string); 252060e4882SDoug Ambrisko } 253060e4882SDoug Ambrisko 254060e4882SDoug Ambrisko void 255060e4882SDoug Ambrisko linux_free_get_char_devices(char *string) 256060e4882SDoug Ambrisko { 25719e252baSAlexander Leidinger 2581ede983cSDag-Erling Smørgrav free(string, M_LINUX); 259060e4882SDoug Ambrisko } 260060e4882SDoug Ambrisko 261060e4882SDoug Ambrisko static int linux_major_starting = 200; 262060e4882SDoug Ambrisko 263060e4882SDoug Ambrisko int 264060e4882SDoug Ambrisko linux_device_register_handler(struct linux_device_handler *d) 265060e4882SDoug Ambrisko { 266060e4882SDoug Ambrisko struct device_element *de; 267060e4882SDoug Ambrisko 26867d39748SDmitry Chagin if (d == NULL) 26919e252baSAlexander Leidinger return (EINVAL); 27019e252baSAlexander Leidinger 27119e252baSAlexander Leidinger de = malloc(sizeof(*de), M_LINUX, M_WAITOK); 272060e4882SDoug Ambrisko if (d->linux_major < 0) { 273060e4882SDoug Ambrisko d->linux_major = linux_major_starting++; 274060e4882SDoug Ambrisko } 275060e4882SDoug Ambrisko bcopy(d, &de->entry, sizeof(*d)); 276060e4882SDoug Ambrisko 277060e4882SDoug Ambrisko /* Add the element to the list, sorted on span. */ 278060e4882SDoug Ambrisko TAILQ_INSERT_TAIL(&devices, de, list); 279060e4882SDoug Ambrisko 280060e4882SDoug Ambrisko return (0); 281060e4882SDoug Ambrisko } 282060e4882SDoug Ambrisko 283060e4882SDoug Ambrisko int 284060e4882SDoug Ambrisko linux_device_unregister_handler(struct linux_device_handler *d) 285060e4882SDoug Ambrisko { 286060e4882SDoug Ambrisko struct device_element *de; 287060e4882SDoug Ambrisko 28867d39748SDmitry Chagin if (d == NULL) 289060e4882SDoug Ambrisko return (EINVAL); 290060e4882SDoug Ambrisko 291060e4882SDoug Ambrisko TAILQ_FOREACH(de, &devices, list) { 292060e4882SDoug Ambrisko if (bcmp(d, &de->entry, sizeof(*d)) == 0) { 293060e4882SDoug Ambrisko TAILQ_REMOVE(&devices, de, list); 2941ede983cSDag-Erling Smørgrav free(de, M_LINUX); 29519e252baSAlexander Leidinger 296060e4882SDoug Ambrisko return (0); 297060e4882SDoug Ambrisko } 298060e4882SDoug Ambrisko } 299060e4882SDoug Ambrisko 300060e4882SDoug Ambrisko return (EINVAL); 301060e4882SDoug Ambrisko } 302