Index: head/share/man/man4/linux.4 =================================================================== --- head/share/man/man4/linux.4 (revision 362103) +++ head/share/man/man4/linux.4 (revision 362104) @@ -1,154 +1,158 @@ .\" Copyright (c) 2000 Sheldon Hearn .\" All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .\" $FreeBSD$ .\" -.Dd June 10, 2020 +.Dd June 12, 2020 .Dt LINUX 4 .Os .Sh NAME .Nm linux .Nd Linux ABI support .Sh SYNOPSIS To compile support for this ABI into an i386 kernel place the following line in your kernel configuration file: .Bd -ragged -offset indent .Cd "options COMPAT_LINUX" .Ed .Pp for an amd64 kernel use: .Bd -ragged -offset indent .Cd "options COMPAT_LINUX32" .Ed .Pp Alternatively, to load the ABI as a module at boot time, place the following line in .Xr loader.conf 5 : .Bd -literal -offset indent linux_load="YES" .Ed .Sh DESCRIPTION The .Nm module provides limited Linux ABI (application binary interface) compatibility, making it possible to run many unmodified Linux applications and libraries without the need for virtualization or emulation. Some of the facilities provided are: .Bl -bullet .It An image activator for correctly branded .Xr elf 5 executable images .It Special signal handling for activated images .It Linux to native system call translation .It Linux-specific system calls .El .Pp Note that dynamically linked Linux executables will require a suitable environment in .Pa /compat/linux . This includes native Linux shared libraries, and Linux-specific virtual filesystems. To set it up, install the .Pa emulators/linux_base-c7 port or the linux_base-c7 package, and add the following line to the .Xr rc.conf 5 file: .Pp .Dl linux_enable="YES" .Pp To avoid mounting Linux-specific filesystems at startup, also add the following line: .Pp .Dl linux_mounts_enable="NO" .Sh SYSCTL VARIABLES The following variables are available as both .Xr sysctl 8 variables and .Xr loader 8 tunables: .Bl -tag -width indent +.It Va compat.linux.debug +Enable debugging messages. +Set to 0 to silence them. +Defaults to 1. .It Va compat.linux.default_openfiles Default soft openfiles resource limit for Linux applications. Set to -1 to disable the limit. Defaults to 1024. .It Va compat.linux.emul_path Path to the Linux run-time environment. Defaults to .Pa /compat/linux . .It Va compat.linux.osname Linux kernel operating system name. .It Va compat.linux.osrelease Linux kernel operating system release. Changing this to something else is discouraged on non-development systems, because it may change the way Linux programs work. Recent versions of GNU libc are known to use different syscalls depending on the value of this sysctl. .It Va compat.linux.oss_version Linux Open Sound System version. .It Va compat.linux.preserve_vstatus When set to 1, it prevents Linux applications from resetting the .Xr termios 4 VSTATUS setting. From a user perspective, this makes .Va SIGINFO work for Linux executables. Defaults to 0. .Sh FILES .Bl -tag -width /compat/linux/dev/shm -compact .It Pa /compat/linux minimal Linux run-time environment .It Pa /compat/linux/dev/fd file-descriptor file system, see .Xr fdescfs 5 .It Pa /compat/linux/dev/shm in-memory file system, see .Xr tmpfs 5 .It Pa /compat/linux/proc Linux process file system, see .Xr linprocfs 5 .It Pa /compat/linux/sys Linux kernel objects file system, see .Xr linsysfs 5 .El .Sh SEE ALSO .Xr brandelf 1 , .Xr pty 4 , .Xr elf 5 , .Xr fdescfs 5 , .Xr linprocfs 5 , .Xr linsysfs 5 , .Xr tmpfs 5 .Sh HISTORY Linux ABI support first appeared in .Fx 2.1 . .Sh BUGS Support for some of the Linux-specific system calls and system call arguments is missing. Index: head/sys/compat/linux/linux_mib.c =================================================================== --- head/sys/compat/linux/linux_mib.c (revision 362103) +++ head/sys/compat/linux/linux_mib.c (revision 362104) @@ -1,561 +1,565 @@ /*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 1999 Marcel Moolenaar * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #include struct linux_prison { char pr_osname[LINUX_MAX_UTSNAME]; char pr_osrelease[LINUX_MAX_UTSNAME]; int pr_oss_version; int pr_osrel; }; static struct linux_prison lprison0 = { .pr_osname = "Linux", .pr_osrelease = LINUX_VERSION_STR, .pr_oss_version = 0x030600, .pr_osrel = LINUX_VERSION_CODE }; static unsigned linux_osd_jail_slot; SYSCTL_NODE(_compat, OID_AUTO, linux, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, "Linux mode"); +int linux_debug = 1; +SYSCTL_INT(_compat_linux, OID_AUTO, debug, CTLFLAG_RWTUN, + &linux_debug, 0, "Log warnings from linux(4); or 0 to disable"); + int linux_default_openfiles = 1024; SYSCTL_INT(_compat_linux, OID_AUTO, default_openfiles, CTLFLAG_RWTUN, &linux_default_openfiles, 0, "Default soft openfiles resource limit, or -1 for unlimited"); int linux_ignore_ip_recverr = 1; SYSCTL_INT(_compat_linux, OID_AUTO, ignore_ip_recverr, CTLFLAG_RWTUN, &linux_ignore_ip_recverr, 0, "Ignore enabling IP_RECVERR"); int linux_preserve_vstatus = 0; SYSCTL_INT(_compat_linux, OID_AUTO, preserve_vstatus, CTLFLAG_RWTUN, &linux_preserve_vstatus, 0, "Preserve VSTATUS termios(4) flag"); bool linux_map_sched_prio = true; SYSCTL_BOOL(_compat_linux, OID_AUTO, map_sched_prio, CTLFLAG_RDTUN, &linux_map_sched_prio, 0, "Map scheduler priorities to Linux priorities " "(not POSIX compliant)"); static int linux_set_osname(struct thread *td, char *osname); static int linux_set_osrelease(struct thread *td, char *osrelease); static int linux_set_oss_version(struct thread *td, int oss_version); static int linux_sysctl_osname(SYSCTL_HANDLER_ARGS) { char osname[LINUX_MAX_UTSNAME]; int error; linux_get_osname(req->td, osname); error = sysctl_handle_string(oidp, osname, LINUX_MAX_UTSNAME, req); if (error != 0 || req->newptr == NULL) return (error); error = linux_set_osname(req->td, osname); return (error); } SYSCTL_PROC(_compat_linux, OID_AUTO, osname, CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE, 0, 0, linux_sysctl_osname, "A", "Linux kernel OS name"); static int linux_sysctl_osrelease(SYSCTL_HANDLER_ARGS) { char osrelease[LINUX_MAX_UTSNAME]; int error; linux_get_osrelease(req->td, osrelease); error = sysctl_handle_string(oidp, osrelease, LINUX_MAX_UTSNAME, req); if (error != 0 || req->newptr == NULL) return (error); error = linux_set_osrelease(req->td, osrelease); return (error); } SYSCTL_PROC(_compat_linux, OID_AUTO, osrelease, CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE, 0, 0, linux_sysctl_osrelease, "A", "Linux kernel OS release"); static int linux_sysctl_oss_version(SYSCTL_HANDLER_ARGS) { int oss_version; int error; oss_version = linux_get_oss_version(req->td); error = sysctl_handle_int(oidp, &oss_version, 0, req); if (error != 0 || req->newptr == NULL) return (error); error = linux_set_oss_version(req->td, oss_version); return (error); } SYSCTL_PROC(_compat_linux, OID_AUTO, oss_version, CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE, 0, 0, linux_sysctl_oss_version, "I", "Linux OSS version"); /* * Map the osrelease into integer */ static int linux_map_osrel(char *osrelease, int *osrel) { char *sep, *eosrelease; int len, v0, v1, v2, v; len = strlen(osrelease); eosrelease = osrelease + len; v0 = strtol(osrelease, &sep, 10); if (osrelease == sep || sep + 1 >= eosrelease || *sep != '.') return (EINVAL); osrelease = sep + 1; v1 = strtol(osrelease, &sep, 10); if (osrelease == sep || sep + 1 >= eosrelease || *sep != '.') return (EINVAL); osrelease = sep + 1; v2 = strtol(osrelease, &sep, 10); if (osrelease == sep || (sep != eosrelease && (sep + 1 >= eosrelease || *sep != '-'))) return (EINVAL); v = LINUX_KERNVER(v0, v1, v2); if (v < LINUX_KERNVER(1, 0, 0)) return (EINVAL); if (osrel != NULL) *osrel = v; return (0); } /* * Find a prison with Linux info. * Return the Linux info and the (locked) prison. */ static struct linux_prison * linux_find_prison(struct prison *spr, struct prison **prp) { struct prison *pr; struct linux_prison *lpr; for (pr = spr;; pr = pr->pr_parent) { mtx_lock(&pr->pr_mtx); lpr = (pr == &prison0) ? &lprison0 : osd_jail_get(pr, linux_osd_jail_slot); if (lpr != NULL) break; mtx_unlock(&pr->pr_mtx); } *prp = pr; return (lpr); } /* * Ensure a prison has its own Linux info. If lprp is non-null, point it to * the Linux info and lock the prison. */ static void linux_alloc_prison(struct prison *pr, struct linux_prison **lprp) { struct prison *ppr; struct linux_prison *lpr, *nlpr; void **rsv; /* If this prison already has Linux info, return that. */ lpr = linux_find_prison(pr, &ppr); if (ppr == pr) goto done; /* * Allocate a new info record. Then check again, in case something * changed during the allocation. */ mtx_unlock(&ppr->pr_mtx); nlpr = malloc(sizeof(struct linux_prison), M_PRISON, M_WAITOK); rsv = osd_reserve(linux_osd_jail_slot); lpr = linux_find_prison(pr, &ppr); if (ppr == pr) { free(nlpr, M_PRISON); osd_free_reserved(rsv); goto done; } /* Inherit the initial values from the ancestor. */ mtx_lock(&pr->pr_mtx); (void)osd_jail_set_reserved(pr, linux_osd_jail_slot, rsv, nlpr); bcopy(lpr, nlpr, sizeof(*lpr)); lpr = nlpr; mtx_unlock(&ppr->pr_mtx); done: if (lprp != NULL) *lprp = lpr; else mtx_unlock(&pr->pr_mtx); } /* * Jail OSD methods for Linux prison data. */ static int linux_prison_create(void *obj, void *data) { struct prison *pr = obj; struct vfsoptlist *opts = data; int jsys; if (vfs_copyopt(opts, "linux", &jsys, sizeof(jsys)) == 0 && jsys == JAIL_SYS_INHERIT) return (0); /* * Inherit a prison's initial values from its parent * (different from JAIL_SYS_INHERIT which also inherits changes). */ linux_alloc_prison(pr, NULL); return (0); } static int linux_prison_check(void *obj __unused, void *data) { struct vfsoptlist *opts = data; char *osname, *osrelease; int error, jsys, len, oss_version; /* Check that the parameters are correct. */ error = vfs_copyopt(opts, "linux", &jsys, sizeof(jsys)); if (error != ENOENT) { if (error != 0) return (error); if (jsys != JAIL_SYS_NEW && jsys != JAIL_SYS_INHERIT) return (EINVAL); } error = vfs_getopt(opts, "linux.osname", (void **)&osname, &len); if (error != ENOENT) { if (error != 0) return (error); if (len == 0 || osname[len - 1] != '\0') return (EINVAL); if (len > LINUX_MAX_UTSNAME) { vfs_opterror(opts, "linux.osname too long"); return (ENAMETOOLONG); } } error = vfs_getopt(opts, "linux.osrelease", (void **)&osrelease, &len); if (error != ENOENT) { if (error != 0) return (error); if (len == 0 || osrelease[len - 1] != '\0') return (EINVAL); if (len > LINUX_MAX_UTSNAME) { vfs_opterror(opts, "linux.osrelease too long"); return (ENAMETOOLONG); } error = linux_map_osrel(osrelease, NULL); if (error != 0) { vfs_opterror(opts, "linux.osrelease format error"); return (error); } } error = vfs_copyopt(opts, "linux.oss_version", &oss_version, sizeof(oss_version)); if (error == ENOENT) error = 0; return (error); } static int linux_prison_set(void *obj, void *data) { struct linux_prison *lpr; struct prison *pr = obj; struct vfsoptlist *opts = data; char *osname, *osrelease; int error, gotversion, jsys, len, oss_version; /* Set the parameters, which should be correct. */ error = vfs_copyopt(opts, "linux", &jsys, sizeof(jsys)); if (error == ENOENT) jsys = -1; error = vfs_getopt(opts, "linux.osname", (void **)&osname, &len); if (error == ENOENT) osname = NULL; else jsys = JAIL_SYS_NEW; error = vfs_getopt(opts, "linux.osrelease", (void **)&osrelease, &len); if (error == ENOENT) osrelease = NULL; else jsys = JAIL_SYS_NEW; error = vfs_copyopt(opts, "linux.oss_version", &oss_version, sizeof(oss_version)); if (error == ENOENT) gotversion = 0; else { gotversion = 1; jsys = JAIL_SYS_NEW; } switch (jsys) { case JAIL_SYS_INHERIT: /* "linux=inherit": inherit the parent's Linux info. */ mtx_lock(&pr->pr_mtx); osd_jail_del(pr, linux_osd_jail_slot); mtx_unlock(&pr->pr_mtx); break; case JAIL_SYS_NEW: /* * "linux=new" or "linux.*": * the prison gets its own Linux info. */ linux_alloc_prison(pr, &lpr); if (osrelease) { (void)linux_map_osrel(osrelease, &lpr->pr_osrel); strlcpy(lpr->pr_osrelease, osrelease, LINUX_MAX_UTSNAME); } if (osname) strlcpy(lpr->pr_osname, osname, LINUX_MAX_UTSNAME); if (gotversion) lpr->pr_oss_version = oss_version; mtx_unlock(&pr->pr_mtx); } return (0); } SYSCTL_JAIL_PARAM_SYS_NODE(linux, CTLFLAG_RW, "Jail Linux parameters"); SYSCTL_JAIL_PARAM_STRING(_linux, osname, CTLFLAG_RW, LINUX_MAX_UTSNAME, "Jail Linux kernel OS name"); SYSCTL_JAIL_PARAM_STRING(_linux, osrelease, CTLFLAG_RW, LINUX_MAX_UTSNAME, "Jail Linux kernel OS release"); SYSCTL_JAIL_PARAM(_linux, oss_version, CTLTYPE_INT | CTLFLAG_RW, "I", "Jail Linux OSS version"); static int linux_prison_get(void *obj, void *data) { struct linux_prison *lpr; struct prison *ppr; struct prison *pr = obj; struct vfsoptlist *opts = data; int error, i; static int version0; /* See if this prison is the one with the Linux info. */ lpr = linux_find_prison(pr, &ppr); i = (ppr == pr) ? JAIL_SYS_NEW : JAIL_SYS_INHERIT; error = vfs_setopt(opts, "linux", &i, sizeof(i)); if (error != 0 && error != ENOENT) goto done; if (i) { error = vfs_setopts(opts, "linux.osname", lpr->pr_osname); if (error != 0 && error != ENOENT) goto done; error = vfs_setopts(opts, "linux.osrelease", lpr->pr_osrelease); if (error != 0 && error != ENOENT) goto done; error = vfs_setopt(opts, "linux.oss_version", &lpr->pr_oss_version, sizeof(lpr->pr_oss_version)); if (error != 0 && error != ENOENT) goto done; } else { /* * If this prison is inheriting its Linux info, report * empty/zero parameters. */ error = vfs_setopts(opts, "linux.osname", ""); if (error != 0 && error != ENOENT) goto done; error = vfs_setopts(opts, "linux.osrelease", ""); if (error != 0 && error != ENOENT) goto done; error = vfs_setopt(opts, "linux.oss_version", &version0, sizeof(lpr->pr_oss_version)); if (error != 0 && error != ENOENT) goto done; } error = 0; done: mtx_unlock(&ppr->pr_mtx); return (error); } static void linux_prison_destructor(void *data) { free(data, M_PRISON); } void linux_osd_jail_register(void) { struct prison *pr; osd_method_t methods[PR_MAXMETHOD] = { [PR_METHOD_CREATE] = linux_prison_create, [PR_METHOD_GET] = linux_prison_get, [PR_METHOD_SET] = linux_prison_set, [PR_METHOD_CHECK] = linux_prison_check }; linux_osd_jail_slot = osd_jail_register(linux_prison_destructor, methods); /* Copy the system Linux info to any current prisons. */ sx_slock(&allprison_lock); TAILQ_FOREACH(pr, &allprison, pr_list) linux_alloc_prison(pr, NULL); sx_sunlock(&allprison_lock); } void linux_osd_jail_deregister(void) { osd_jail_deregister(linux_osd_jail_slot); } void linux_get_osname(struct thread *td, char *dst) { struct prison *pr; struct linux_prison *lpr; lpr = linux_find_prison(td->td_ucred->cr_prison, &pr); bcopy(lpr->pr_osname, dst, LINUX_MAX_UTSNAME); mtx_unlock(&pr->pr_mtx); } static int linux_set_osname(struct thread *td, char *osname) { struct prison *pr; struct linux_prison *lpr; lpr = linux_find_prison(td->td_ucred->cr_prison, &pr); strlcpy(lpr->pr_osname, osname, LINUX_MAX_UTSNAME); mtx_unlock(&pr->pr_mtx); return (0); } void linux_get_osrelease(struct thread *td, char *dst) { struct prison *pr; struct linux_prison *lpr; lpr = linux_find_prison(td->td_ucred->cr_prison, &pr); bcopy(lpr->pr_osrelease, dst, LINUX_MAX_UTSNAME); mtx_unlock(&pr->pr_mtx); } int linux_kernver(struct thread *td) { struct prison *pr; struct linux_prison *lpr; int osrel; lpr = linux_find_prison(td->td_ucred->cr_prison, &pr); osrel = lpr->pr_osrel; mtx_unlock(&pr->pr_mtx); return (osrel); } static int linux_set_osrelease(struct thread *td, char *osrelease) { struct prison *pr; struct linux_prison *lpr; int error; lpr = linux_find_prison(td->td_ucred->cr_prison, &pr); error = linux_map_osrel(osrelease, &lpr->pr_osrel); if (error == 0) strlcpy(lpr->pr_osrelease, osrelease, LINUX_MAX_UTSNAME); mtx_unlock(&pr->pr_mtx); return (error); } int linux_get_oss_version(struct thread *td) { struct prison *pr; struct linux_prison *lpr; int version; lpr = linux_find_prison(td->td_ucred->cr_prison, &pr); version = lpr->pr_oss_version; mtx_unlock(&pr->pr_mtx); return (version); } static int linux_set_oss_version(struct thread *td, int oss_version) { struct prison *pr; struct linux_prison *lpr; lpr = linux_find_prison(td->td_ucred->cr_prison, &pr); lpr->pr_oss_version = oss_version; mtx_unlock(&pr->pr_mtx); return (0); } Index: head/sys/compat/linux/linux_mib.h =================================================================== --- head/sys/compat/linux/linux_mib.h (revision 362103) +++ head/sys/compat/linux/linux_mib.h (revision 362104) @@ -1,70 +1,71 @@ /*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 1999 Marcel Moolenaar * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD$ */ #ifndef _LINUX_MIB_H_ #define _LINUX_MIB_H_ #ifdef SYSCTL_DECL SYSCTL_DECL(_compat_linux); #endif void linux_osd_jail_register(void); void linux_osd_jail_deregister(void); void linux_get_osname(struct thread *td, char *dst); void linux_get_osrelease(struct thread *td, char *dst); int linux_get_oss_version(struct thread *td); int linux_kernver(struct thread *td); #define LINUX_KVERSION 3 #define LINUX_KPATCHLEVEL 2 #define LINUX_KSUBLEVEL 0 #define LINUX_KERNVER(a,b,c) (((a) << 16) + ((b) << 8) + (c)) #define LINUX_VERSION_CODE LINUX_KERNVER(LINUX_KVERSION, \ LINUX_KPATCHLEVEL, LINUX_KSUBLEVEL) #define LINUX_KERNVERSTR(x) #x #define LINUX_XKERNVERSTR(x) LINUX_KERNVERSTR(x) #define LINUX_VERSION_STR LINUX_XKERNVERSTR(LINUX_KVERSION.LINUX_KPATCHLEVEL.LINUX_KSUBLEVEL) #define LINUX_KERNVER_2004000 LINUX_KERNVER(2,4,0) #define LINUX_KERNVER_2006000 LINUX_KERNVER(2,6,0) #define linux_use26(t) (linux_kernver(t) >= LINUX_KERNVER_2006000) +extern int linux_debug; extern int linux_default_openfiles; extern int linux_ignore_ip_recverr; extern int linux_preserve_vstatus; extern bool linux_map_sched_prio; #endif /* _LINUX_MIB_H_ */ Index: head/sys/compat/linux/linux_util.c =================================================================== --- head/sys/compat/linux/linux_util.c (revision 362103) +++ head/sys/compat/linux/linux_util.c (revision 362104) @@ -1,279 +1,282 @@ /*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1994 Christos Zoulas * Copyright (c) 1995 Frank van der Linden * Copyright (c) 1995 Scott Bartram * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * from: svr4_util.c,v 1.5 1995/01/22 23:44:50 christos Exp */ #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include MALLOC_DEFINE(M_LINUX, "linux", "Linux mode structures"); MALLOC_DEFINE(M_EPOLL, "lepoll", "Linux events structures"); MALLOC_DEFINE(M_FUTEX, "futex", "Linux futexes"); MALLOC_DEFINE(M_FUTEX_WP, "futex wp", "Linux futex waiting proc"); char linux_emul_path[MAXPATHLEN] = "/compat/linux"; SYSCTL_STRING(_compat_linux, OID_AUTO, emul_path, CTLFLAG_RWTUN, linux_emul_path, sizeof(linux_emul_path), "Linux runtime environment path"); /* * Search an alternate path before passing pathname arguments on to * system calls. Useful for keeping a separate 'emulation tree'. * * If cflag is set, we check if an attempt can be made to create the * named file, i.e. we check if the directory it should be in exists. */ int linux_emul_convpath(struct thread *td, const char *path, enum uio_seg pathseg, char **pbuf, int cflag, int dfd) { int retval; retval = kern_alternate_path(td, linux_emul_path, path, pathseg, pbuf, cflag, dfd); return (retval); } void linux_msg(const struct thread *td, const char *fmt, ...) { va_list ap; struct proc *p; + if (linux_debug == 0) + return; + p = td->td_proc; printf("linux: pid %d (%s): ", (int)p->p_pid, p->p_comm); va_start(ap, fmt); vprintf(fmt, ap); va_end(ap); printf("\n"); } struct device_element { TAILQ_ENTRY(device_element) list; struct linux_device_handler entry; }; static TAILQ_HEAD(, device_element) devices = TAILQ_HEAD_INITIALIZER(devices); static struct linux_device_handler null_handler = { "mem", "mem", "null", "null", 1, 3, 1}; DATA_SET(linux_device_handler_set, null_handler); char * linux_driver_get_name_dev(device_t dev) { struct device_element *de; const char *device_name = device_get_name(dev); if (device_name == NULL) return (NULL); TAILQ_FOREACH(de, &devices, list) { if (strcmp(device_name, de->entry.bsd_driver_name) == 0) return (de->entry.linux_driver_name); } return (NULL); } int linux_driver_get_major_minor(const char *node, int *major, int *minor) { struct device_element *de; unsigned long devno; size_t sz; if (node == NULL || major == NULL || minor == NULL) return (1); sz = sizeof("pts/") - 1; if (strncmp(node, "pts/", sz) == 0 && node[sz] != '\0') { /* * Linux checks major and minors of the slave device * to make sure it's a pty device, so let's make him * believe it is. */ devno = strtoul(node + sz, NULL, 10); *major = 136 + (devno / 256); *minor = devno % 256; return (0); } sz = sizeof("dri/card") - 1; if (strncmp(node, "dri/card", sz) == 0 && node[sz] != '\0') { devno = strtoul(node + sz, NULL, 10); *major = 226 + (devno / 256); *minor = devno % 256; return (0); } sz = sizeof("dri/controlD") - 1; if (strncmp(node, "dri/controlD", sz) == 0 && node[sz] != '\0') { devno = strtoul(node + sz, NULL, 10); *major = 226 + (devno / 256); *minor = devno % 256; return (0); } sz = sizeof("dri/renderD") - 1; if (strncmp(node, "dri/renderD", sz) == 0 && node[sz] != '\0') { devno = strtoul(node + sz, NULL, 10); *major = 226 + (devno / 256); *minor = devno % 256; return (0); } sz = sizeof("drm/") - 1; if (strncmp(node, "drm/", sz) == 0 && node[sz] != '\0') { devno = strtoul(node + sz, NULL, 10); *major = 226 + (devno / 256); *minor = devno % 256; return (0); } TAILQ_FOREACH(de, &devices, list) { if (strcmp(node, de->entry.bsd_device_name) == 0) { *major = de->entry.linux_major; *minor = de->entry.linux_minor; return (0); } } return (1); } char * linux_get_char_devices() { struct device_element *de; char *temp, *string, *last; char formated[256]; int current_size = 0, string_size = 1024; string = malloc(string_size, M_LINUX, M_WAITOK); string[0] = '\000'; last = ""; TAILQ_FOREACH(de, &devices, list) { if (!de->entry.linux_char_device) continue; temp = string; if (strcmp(last, de->entry.bsd_driver_name) != 0) { last = de->entry.bsd_driver_name; snprintf(formated, sizeof(formated), "%3d %s\n", de->entry.linux_major, de->entry.linux_device_name); if (strlen(formated) + current_size >= string_size) { string_size *= 2; string = malloc(string_size, M_LINUX, M_WAITOK); bcopy(temp, string, current_size); free(temp, M_LINUX); } strcat(string, formated); current_size = strlen(string); } } return (string); } void linux_free_get_char_devices(char *string) { free(string, M_LINUX); } static int linux_major_starting = 200; int linux_device_register_handler(struct linux_device_handler *d) { struct device_element *de; if (d == NULL) return (EINVAL); de = malloc(sizeof(*de), M_LINUX, M_WAITOK); if (d->linux_major < 0) { d->linux_major = linux_major_starting++; } bcopy(d, &de->entry, sizeof(*d)); /* Add the element to the list, sorted on span. */ TAILQ_INSERT_TAIL(&devices, de, list); return (0); } int linux_device_unregister_handler(struct linux_device_handler *d) { struct device_element *de; if (d == NULL) return (EINVAL); TAILQ_FOREACH(de, &devices, list) { if (bcmp(d, &de->entry, sizeof(*d)) == 0) { TAILQ_REMOVE(&devices, de, list); free(de, M_LINUX); return (0); } } return (EINVAL); }