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> 38166e2e5aSDmitry Chagin #include <sys/types.h> 39060e4882SDoug Ambrisko #include <sys/bus.h> 401a34e9faSEdward Tomasz Napierala #include <sys/conf.h> 4157b4252eSKonstantin Belousov #include <sys/fcntl.h> 428ec6c4a3SAlexander Leidinger #include <sys/jail.h> 43d4364109SBruce Evans #include <sys/malloc.h> 44d66a5066SPeter Wemm #include <sys/namei.h> 45d66a5066SPeter Wemm #include <sys/proc.h> 466072eea0SDmitry Chagin #include <sys/stat.h> 4725771ec2SJohn Baldwin #include <sys/syscallsubr.h> 48d66a5066SPeter Wemm #include <sys/vnode.h> 49d66a5066SPeter Wemm 50e15583ceSAlfred Perlstein #include <machine/stdarg.h> 51e15583ceSAlfred Perlstein 5277fb6b66STijl Coosemans #include <compat/linux/linux_dtrace.h> 53b5f20658SEdward Tomasz Napierala #include <compat/linux/linux_mib.h> 54ac951e62SMarcel Moolenaar #include <compat/linux/linux_util.h> 55762e6b85SEivind Eklund 5667d39748SDmitry Chagin MALLOC_DEFINE(M_LINUX, "linux", "Linux mode structures"); 57e16fe1c7SDmitry Chagin MALLOC_DEFINE(M_EPOLL, "lepoll", "Linux events structures"); 5819e252baSAlexander Leidinger 5977fb6b66STijl Coosemans FEATURE(linuxulator_v4l, "V4L ioctl wrapper support in the linuxulator"); 6077fb6b66STijl Coosemans FEATURE(linuxulator_v4l2, "V4L2 ioctl wrapper support in the linuxulator"); 6177fb6b66STijl Coosemans 6277fb6b66STijl Coosemans /** 6377fb6b66STijl Coosemans * Special DTrace provider for the linuxulator. 6477fb6b66STijl Coosemans * 6577fb6b66STijl Coosemans * In this file we define the provider for the entire linuxulator. All 6677fb6b66STijl Coosemans * modules (= files of the linuxulator) use it. 6777fb6b66STijl Coosemans * 6877fb6b66STijl Coosemans * We define a different name depending on the emulated bitsize, see 6977fb6b66STijl Coosemans * ../../<ARCH>/linux{,32}/linux.h, e.g.: 7077fb6b66STijl Coosemans * native bitsize = linuxulator 7177fb6b66STijl Coosemans * amd64, 32bit emulation = linuxulator32 7277fb6b66STijl Coosemans */ 7377fb6b66STijl Coosemans LIN_SDT_PROVIDER_DEFINE(linuxulator); 7477fb6b66STijl Coosemans LIN_SDT_PROVIDER_DEFINE(linuxulator32); 7577fb6b66STijl Coosemans 76b5f20658SEdward Tomasz Napierala char linux_emul_path[MAXPATHLEN] = "/compat/linux"; 77b5f20658SEdward Tomasz Napierala 78b5f20658SEdward Tomasz Napierala SYSCTL_STRING(_compat_linux, OID_AUTO, emul_path, CTLFLAG_RWTUN, 79b5f20658SEdward Tomasz Napierala linux_emul_path, sizeof(linux_emul_path), 80b5f20658SEdward Tomasz Napierala "Linux runtime environment path"); 81d66a5066SPeter Wemm 82d66a5066SPeter Wemm int 83fd745e1dSDmitry Chagin linux_pwd_onexec(struct thread *td) 84ff766321SIan Dowse { 85fd745e1dSDmitry Chagin struct nameidata nd; 86fd745e1dSDmitry Chagin struct pwd *pwd; 87fd745e1dSDmitry Chagin int error; 88d66a5066SPeter Wemm 89fd745e1dSDmitry Chagin NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, linux_emul_path); 90fd745e1dSDmitry Chagin error = namei(&nd); 91fd745e1dSDmitry Chagin if (error != 0) { 92fd745e1dSDmitry Chagin /* 93fd745e1dSDmitry Chagin * Do not bother if we are in chroot or jail. 94fd745e1dSDmitry Chagin */ 95fd745e1dSDmitry Chagin pwd = pwd_hold(td); 96fd745e1dSDmitry Chagin if (pwd->pwd_rdir != rootvnode) { 97fd745e1dSDmitry Chagin pwd_drop(pwd); 98fd745e1dSDmitry Chagin return (0); 99fd745e1dSDmitry Chagin } 100fd745e1dSDmitry Chagin pwd_drop(pwd); 101fd745e1dSDmitry Chagin return (error); 102fd745e1dSDmitry Chagin } 103fd745e1dSDmitry Chagin NDFREE_PNBUF(&nd); 104fd745e1dSDmitry Chagin pwd_altroot(td, nd.ni_vp); 105fd745e1dSDmitry Chagin vrele(nd.ni_vp); 106fd745e1dSDmitry Chagin return (0); 107fd745e1dSDmitry Chagin } 10819e252baSAlexander Leidinger 109fd745e1dSDmitry Chagin void 110fd745e1dSDmitry Chagin linux_pwd_onexec_native(struct thread *td) 111fd745e1dSDmitry Chagin { 112fd745e1dSDmitry Chagin 113fd745e1dSDmitry Chagin pwd_altroot(td, NULL); 114d66a5066SPeter Wemm } 115e15583ceSAlfred Perlstein 116e15583ceSAlfred Perlstein void 117e15583ceSAlfred Perlstein linux_msg(const struct thread *td, const char *fmt, ...) 118e15583ceSAlfred Perlstein { 119e15583ceSAlfred Perlstein va_list ap; 120e15583ceSAlfred Perlstein struct proc *p; 121e15583ceSAlfred Perlstein 122462171d9SEdward Tomasz Napierala if (linux_debug == 0) 123462171d9SEdward Tomasz Napierala return; 124462171d9SEdward Tomasz Napierala 125e15583ceSAlfred Perlstein p = td->td_proc; 1268ec6c4a3SAlexander Leidinger printf("linux: jid %d pid %d (%s): ", p->p_ucred->cr_prison->pr_id, 1278ec6c4a3SAlexander Leidinger (int)p->p_pid, p->p_comm); 128e15583ceSAlfred Perlstein va_start(ap, fmt); 129e15583ceSAlfred Perlstein vprintf(fmt, ap); 130e15583ceSAlfred Perlstein va_end(ap); 131e15583ceSAlfred Perlstein printf("\n"); 132e15583ceSAlfred Perlstein } 133060e4882SDoug Ambrisko 134060e4882SDoug Ambrisko struct device_element 135060e4882SDoug Ambrisko { 136060e4882SDoug Ambrisko TAILQ_ENTRY(device_element) list; 137060e4882SDoug Ambrisko struct linux_device_handler entry; 138060e4882SDoug Ambrisko }; 139060e4882SDoug Ambrisko 140060e4882SDoug Ambrisko static TAILQ_HEAD(, device_element) devices = 141060e4882SDoug Ambrisko TAILQ_HEAD_INITIALIZER(devices); 142060e4882SDoug Ambrisko 143060e4882SDoug Ambrisko static struct linux_device_handler null_handler = 144060e4882SDoug Ambrisko { "mem", "mem", "null", "null", 1, 3, 1}; 145060e4882SDoug Ambrisko 146060e4882SDoug Ambrisko DATA_SET(linux_device_handler_set, null_handler); 147060e4882SDoug Ambrisko 148060e4882SDoug Ambrisko char * 149060e4882SDoug Ambrisko linux_driver_get_name_dev(device_t dev) 150060e4882SDoug Ambrisko { 151060e4882SDoug Ambrisko struct device_element *de; 152060e4882SDoug Ambrisko const char *device_name = device_get_name(dev); 153060e4882SDoug Ambrisko 15467d39748SDmitry Chagin if (device_name == NULL) 155340f4a8dSEd Maste return (NULL); 156060e4882SDoug Ambrisko TAILQ_FOREACH(de, &devices, list) { 15767d39748SDmitry Chagin if (strcmp(device_name, de->entry.bsd_driver_name) == 0) 158060e4882SDoug Ambrisko return (de->entry.linux_driver_name); 159060e4882SDoug Ambrisko } 160060e4882SDoug Ambrisko 16167d39748SDmitry Chagin return (NULL); 162060e4882SDoug Ambrisko } 163060e4882SDoug Ambrisko 164060e4882SDoug Ambrisko int 1657870adb6SEd Schouten linux_driver_get_major_minor(const char *node, int *major, int *minor) 166060e4882SDoug Ambrisko { 167060e4882SDoug Ambrisko struct device_element *de; 1682d347b2eSConrad Meyer unsigned long devno; 169f3792e07STijl Coosemans size_t sz; 170060e4882SDoug Ambrisko 17167d39748SDmitry Chagin if (node == NULL || major == NULL || minor == NULL) 172340f4a8dSEd Maste return (1); 173a147e6caSEd Schouten 174f3792e07STijl Coosemans sz = sizeof("pts/") - 1; 175f3792e07STijl Coosemans if (strncmp(node, "pts/", sz) == 0 && node[sz] != '\0') { 176a147e6caSEd Schouten /* 177a147e6caSEd Schouten * Linux checks major and minors of the slave device 178a147e6caSEd Schouten * to make sure it's a pty device, so let's make him 179a147e6caSEd Schouten * believe it is. 180a147e6caSEd Schouten */ 181f3792e07STijl Coosemans devno = strtoul(node + sz, NULL, 10); 182a147e6caSEd Schouten *major = 136 + (devno / 256); 183a147e6caSEd Schouten *minor = devno % 256; 18467d39748SDmitry Chagin return (0); 185a147e6caSEd Schouten } 186a147e6caSEd Schouten 187834804f3STijl Coosemans sz = sizeof("dri/card") - 1; 188834804f3STijl Coosemans if (strncmp(node, "dri/card", sz) == 0 && node[sz] != '\0') { 189834804f3STijl Coosemans devno = strtoul(node + sz, NULL, 10); 190834804f3STijl Coosemans *major = 226 + (devno / 256); 191834804f3STijl Coosemans *minor = devno % 256; 192834804f3STijl Coosemans return (0); 193834804f3STijl Coosemans } 194834804f3STijl Coosemans sz = sizeof("dri/controlD") - 1; 195834804f3STijl Coosemans if (strncmp(node, "dri/controlD", sz) == 0 && node[sz] != '\0') { 196834804f3STijl Coosemans devno = strtoul(node + sz, NULL, 10); 197834804f3STijl Coosemans *major = 226 + (devno / 256); 198834804f3STijl Coosemans *minor = devno % 256; 199834804f3STijl Coosemans return (0); 200834804f3STijl Coosemans } 201834804f3STijl Coosemans sz = sizeof("dri/renderD") - 1; 202834804f3STijl Coosemans if (strncmp(node, "dri/renderD", sz) == 0 && node[sz] != '\0') { 203834804f3STijl Coosemans devno = strtoul(node + sz, NULL, 10); 204834804f3STijl Coosemans *major = 226 + (devno / 256); 205834804f3STijl Coosemans *minor = devno % 256; 206834804f3STijl Coosemans return (0); 207834804f3STijl Coosemans } 208f3792e07STijl Coosemans sz = sizeof("drm/") - 1; 209f3792e07STijl Coosemans if (strncmp(node, "drm/", sz) == 0 && node[sz] != '\0') { 210f3792e07STijl Coosemans devno = strtoul(node + sz, NULL, 10); 2112d347b2eSConrad Meyer *major = 226 + (devno / 256); 2122d347b2eSConrad Meyer *minor = devno % 256; 2132d347b2eSConrad Meyer return (0); 2142d347b2eSConrad Meyer } 2152d347b2eSConrad Meyer 216060e4882SDoug Ambrisko TAILQ_FOREACH(de, &devices, list) { 217060e4882SDoug Ambrisko if (strcmp(node, de->entry.bsd_device_name) == 0) { 218060e4882SDoug Ambrisko *major = de->entry.linux_major; 219060e4882SDoug Ambrisko *minor = de->entry.linux_minor; 22067d39748SDmitry Chagin return (0); 221060e4882SDoug Ambrisko } 222060e4882SDoug Ambrisko } 223060e4882SDoug Ambrisko 22467d39748SDmitry Chagin return (1); 225060e4882SDoug Ambrisko } 226060e4882SDoug Ambrisko 2271a34e9faSEdward Tomasz Napierala int 2281a34e9faSEdward Tomasz Napierala linux_vn_get_major_minor(const struct vnode *vp, int *major, int *minor) 2291a34e9faSEdward Tomasz Napierala { 2301a34e9faSEdward Tomasz Napierala int error; 2311a34e9faSEdward Tomasz Napierala 2321a34e9faSEdward Tomasz Napierala if (vp->v_type != VCHR) 2331a34e9faSEdward Tomasz Napierala return (ENOTBLK); 2341a34e9faSEdward Tomasz Napierala dev_lock(); 2351a34e9faSEdward Tomasz Napierala if (vp->v_rdev == NULL) { 2361a34e9faSEdward Tomasz Napierala dev_unlock(); 2371a34e9faSEdward Tomasz Napierala return (ENXIO); 2381a34e9faSEdward Tomasz Napierala } 2391a34e9faSEdward Tomasz Napierala error = linux_driver_get_major_minor(devtoname(vp->v_rdev), 2401a34e9faSEdward Tomasz Napierala major, minor); 2411a34e9faSEdward Tomasz Napierala dev_unlock(); 2421a34e9faSEdward Tomasz Napierala return (error); 2431a34e9faSEdward Tomasz Napierala } 2441a34e9faSEdward Tomasz Napierala 2456072eea0SDmitry Chagin void 2466072eea0SDmitry Chagin translate_vnhook_major_minor(struct vnode *vp, struct stat *sb) 2476072eea0SDmitry Chagin { 2486072eea0SDmitry Chagin int major, minor; 2496072eea0SDmitry Chagin 2506072eea0SDmitry Chagin if (vn_isdisk(vp)) { 2516072eea0SDmitry Chagin sb->st_mode &= ~S_IFMT; 2526072eea0SDmitry Chagin sb->st_mode |= S_IFBLK; 2536072eea0SDmitry Chagin } 2546072eea0SDmitry Chagin 2556072eea0SDmitry Chagin /* 2566072eea0SDmitry Chagin * Return the same st_dev for every devfs instance. The reason 2576072eea0SDmitry Chagin * for this is to work around an idiosyncrasy of glibc getttynam() 2586072eea0SDmitry Chagin * implementation: it checks whether st_dev returned for fd 0 2596072eea0SDmitry Chagin * is the same as st_dev returned for the target of /proc/self/fd/0 2606072eea0SDmitry Chagin * symlink, and with linux chroots having their own devfs instance, 2616072eea0SDmitry Chagin * the check will fail if you chroot into it. 2626072eea0SDmitry Chagin */ 2636072eea0SDmitry Chagin if (rootdevmp != NULL && vp->v_mount->mnt_vfc == rootdevmp->mnt_vfc) 2646072eea0SDmitry Chagin sb->st_dev = rootdevmp->mnt_stat.f_fsid.val[0]; 2656072eea0SDmitry Chagin 2666072eea0SDmitry Chagin if (linux_vn_get_major_minor(vp, &major, &minor) == 0) 267166e2e5aSDmitry Chagin sb->st_rdev = makedev(major, minor); 2686072eea0SDmitry Chagin } 2696072eea0SDmitry Chagin 270060e4882SDoug Ambrisko char * 271e90d1b57SDimitry Andric linux_get_char_devices(void) 272060e4882SDoug Ambrisko { 273060e4882SDoug Ambrisko struct device_element *de; 274060e4882SDoug Ambrisko char *temp, *string, *last; 275060e4882SDoug Ambrisko char formated[256]; 276060e4882SDoug Ambrisko int current_size = 0, string_size = 1024; 277060e4882SDoug Ambrisko 2781ede983cSDag-Erling Smørgrav string = malloc(string_size, M_LINUX, M_WAITOK); 279060e4882SDoug Ambrisko string[0] = '\000'; 280060e4882SDoug Ambrisko last = ""; 281060e4882SDoug Ambrisko TAILQ_FOREACH(de, &devices, list) { 282060e4882SDoug Ambrisko if (!de->entry.linux_char_device) 283060e4882SDoug Ambrisko continue; 284060e4882SDoug Ambrisko temp = string; 285060e4882SDoug Ambrisko if (strcmp(last, de->entry.bsd_driver_name) != 0) { 286060e4882SDoug Ambrisko last = de->entry.bsd_driver_name; 287060e4882SDoug Ambrisko 288060e4882SDoug Ambrisko snprintf(formated, sizeof(formated), "%3d %s\n", 289060e4882SDoug Ambrisko de->entry.linux_major, 290060e4882SDoug Ambrisko de->entry.linux_device_name); 291060e4882SDoug Ambrisko if (strlen(formated) + current_size 292060e4882SDoug Ambrisko >= string_size) { 293060e4882SDoug Ambrisko string_size *= 2; 2941ede983cSDag-Erling Smørgrav string = malloc(string_size, 295060e4882SDoug Ambrisko M_LINUX, M_WAITOK); 296060e4882SDoug Ambrisko bcopy(temp, string, current_size); 2971ede983cSDag-Erling Smørgrav free(temp, M_LINUX); 298060e4882SDoug Ambrisko } 299060e4882SDoug Ambrisko strcat(string, formated); 300060e4882SDoug Ambrisko current_size = strlen(string); 301060e4882SDoug Ambrisko } 302060e4882SDoug Ambrisko } 303060e4882SDoug Ambrisko 30467d39748SDmitry Chagin return (string); 305060e4882SDoug Ambrisko } 306060e4882SDoug Ambrisko 307060e4882SDoug Ambrisko void 308060e4882SDoug Ambrisko linux_free_get_char_devices(char *string) 309060e4882SDoug Ambrisko { 31019e252baSAlexander Leidinger 3111ede983cSDag-Erling Smørgrav free(string, M_LINUX); 312060e4882SDoug Ambrisko } 313060e4882SDoug Ambrisko 314060e4882SDoug Ambrisko static int linux_major_starting = 200; 315060e4882SDoug Ambrisko 316060e4882SDoug Ambrisko int 317060e4882SDoug Ambrisko linux_device_register_handler(struct linux_device_handler *d) 318060e4882SDoug Ambrisko { 319060e4882SDoug Ambrisko struct device_element *de; 320060e4882SDoug Ambrisko 32167d39748SDmitry Chagin if (d == NULL) 32219e252baSAlexander Leidinger return (EINVAL); 32319e252baSAlexander Leidinger 32419e252baSAlexander Leidinger de = malloc(sizeof(*de), M_LINUX, M_WAITOK); 325060e4882SDoug Ambrisko if (d->linux_major < 0) { 326060e4882SDoug Ambrisko d->linux_major = linux_major_starting++; 327060e4882SDoug Ambrisko } 328060e4882SDoug Ambrisko bcopy(d, &de->entry, sizeof(*d)); 329060e4882SDoug Ambrisko 330060e4882SDoug Ambrisko /* Add the element to the list, sorted on span. */ 331060e4882SDoug Ambrisko TAILQ_INSERT_TAIL(&devices, de, list); 332060e4882SDoug Ambrisko 333060e4882SDoug Ambrisko return (0); 334060e4882SDoug Ambrisko } 335060e4882SDoug Ambrisko 336060e4882SDoug Ambrisko int 337060e4882SDoug Ambrisko linux_device_unregister_handler(struct linux_device_handler *d) 338060e4882SDoug Ambrisko { 339060e4882SDoug Ambrisko struct device_element *de; 340060e4882SDoug Ambrisko 34167d39748SDmitry Chagin if (d == NULL) 342060e4882SDoug Ambrisko return (EINVAL); 343060e4882SDoug Ambrisko 344060e4882SDoug Ambrisko TAILQ_FOREACH(de, &devices, list) { 345060e4882SDoug Ambrisko if (bcmp(d, &de->entry, sizeof(*d)) == 0) { 346060e4882SDoug Ambrisko TAILQ_REMOVE(&devices, de, list); 3471ede983cSDag-Erling Smørgrav free(de, M_LINUX); 34819e252baSAlexander Leidinger 349060e4882SDoug Ambrisko return (0); 350060e4882SDoug Ambrisko } 351060e4882SDoug Ambrisko } 352060e4882SDoug Ambrisko 353060e4882SDoug Ambrisko return (EINVAL); 354060e4882SDoug Ambrisko } 355