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freebsd-dev/sys/compat/linux/linux_misc.c
Dmitry Chagin 23e8912c60 Implement Linux personality() system call mainly due to READ_IMPLIES_EXEC flag. 
In Linux if this flag is set, PROT_READ implies PROT_EXEC for mmap().
Linux/i386 set this flag automatically if the binary requires executable stack.

READ_IMPLIES_EXEC flag will be used in the next Linux mmap() commit.
2016-07-10 08:15:50 +00:00

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/*-
* Copyright (c) 2002 Doug Rabson
* Copyright (c) 1994-1995 Søren Schmidt
* 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
* in this position and unchanged.
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_compat.h"
#include <sys/param.h>
#include <sys/blist.h>
#include <sys/fcntl.h>
#if defined(__i386__)
#include <sys/imgact_aout.h>
#endif
#include <sys/jail.h>
#include <sys/kernel.h>
#include <sys/limits.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mman.h>
#include <sys/mount.h>
#include <sys/mutex.h>
#include <sys/namei.h>
#include <sys/priv.h>
#include <sys/proc.h>
#include <sys/reboot.h>
#include <sys/racct.h>
#include <sys/resourcevar.h>
#include <sys/sched.h>
#include <sys/sdt.h>
#include <sys/signalvar.h>
#include <sys/stat.h>
#include <sys/syscallsubr.h>
#include <sys/sysctl.h>
#include <sys/sysproto.h>
#include <sys/systm.h>
#include <sys/time.h>
#include <sys/vmmeter.h>
#include <sys/vnode.h>
#include <sys/wait.h>
#include <sys/cpuset.h>
#include <security/mac/mac_framework.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <vm/vm_kern.h>
#include <vm/vm_map.h>
#include <vm/vm_extern.h>
#include <vm/vm_object.h>
#include <vm/swap_pager.h>
#ifdef COMPAT_LINUX32
#include <machine/../linux32/linux.h>
#include <machine/../linux32/linux32_proto.h>
#else
#include <machine/../linux/linux.h>
#include <machine/../linux/linux_proto.h>
#endif
#include <compat/linux/linux_dtrace.h>
#include <compat/linux/linux_file.h>
#include <compat/linux/linux_mib.h>
#include <compat/linux/linux_signal.h>
#include <compat/linux/linux_timer.h>
#include <compat/linux/linux_util.h>
#include <compat/linux/linux_sysproto.h>
#include <compat/linux/linux_emul.h>
#include <compat/linux/linux_misc.h>
/**
* Special DTrace provider for the linuxulator.
*
* In this file we define the provider for the entire linuxulator. All
* modules (= files of the linuxulator) use it.
*
* We define a different name depending on the emulated bitsize, see
* ../../<ARCH>/linux{,32}/linux.h, e.g.:
* native bitsize = linuxulator
* amd64, 32bit emulation = linuxulator32
*/
LIN_SDT_PROVIDER_DEFINE(LINUX_DTRACE);
int stclohz; /* Statistics clock frequency */
static unsigned int linux_to_bsd_resource[LINUX_RLIM_NLIMITS] = {
RLIMIT_CPU, RLIMIT_FSIZE, RLIMIT_DATA, RLIMIT_STACK,
RLIMIT_CORE, RLIMIT_RSS, RLIMIT_NPROC, RLIMIT_NOFILE,
RLIMIT_MEMLOCK, RLIMIT_AS
};
struct l_sysinfo {
l_long uptime; /* Seconds since boot */
l_ulong loads[3]; /* 1, 5, and 15 minute load averages */
#define LINUX_SYSINFO_LOADS_SCALE 65536
l_ulong totalram; /* Total usable main memory size */
l_ulong freeram; /* Available memory size */
l_ulong sharedram; /* Amount of shared memory */
l_ulong bufferram; /* Memory used by buffers */
l_ulong totalswap; /* Total swap space size */
l_ulong freeswap; /* swap space still available */
l_ushort procs; /* Number of current processes */
l_ushort pads;
l_ulong totalbig;
l_ulong freebig;
l_uint mem_unit;
char _f[20-2*sizeof(l_long)-sizeof(l_int)]; /* padding */
};
struct l_pselect6arg {
l_uintptr_t ss;
l_size_t ss_len;
};
static int linux_utimensat_nsec_valid(l_long);
int
linux_sysinfo(struct thread *td, struct linux_sysinfo_args *args)
{
struct l_sysinfo sysinfo;
vm_object_t object;
int i, j;
struct timespec ts;
bzero(&sysinfo, sizeof(sysinfo));
getnanouptime(&ts);
if (ts.tv_nsec != 0)
ts.tv_sec++;
sysinfo.uptime = ts.tv_sec;
/* Use the information from the mib to get our load averages */
for (i = 0; i < 3; i++)
sysinfo.loads[i] = averunnable.ldavg[i] *
LINUX_SYSINFO_LOADS_SCALE / averunnable.fscale;
sysinfo.totalram = physmem * PAGE_SIZE;
sysinfo.freeram = sysinfo.totalram - vm_cnt.v_wire_count * PAGE_SIZE;
sysinfo.sharedram = 0;
mtx_lock(&vm_object_list_mtx);
TAILQ_FOREACH(object, &vm_object_list, object_list)
if (object->shadow_count > 1)
sysinfo.sharedram += object->resident_page_count;
mtx_unlock(&vm_object_list_mtx);
sysinfo.sharedram *= PAGE_SIZE;
sysinfo.bufferram = 0;
swap_pager_status(&i, &j);
sysinfo.totalswap = i * PAGE_SIZE;
sysinfo.freeswap = (i - j) * PAGE_SIZE;
sysinfo.procs = nprocs;
/* The following are only present in newer Linux kernels. */
sysinfo.totalbig = 0;
sysinfo.freebig = 0;
sysinfo.mem_unit = 1;
return (copyout(&sysinfo, args->info, sizeof(sysinfo)));
}
int
linux_alarm(struct thread *td, struct linux_alarm_args *args)
{
struct itimerval it, old_it;
u_int secs;
int error;
#ifdef DEBUG
if (ldebug(alarm))
printf(ARGS(alarm, "%u"), args->secs);
#endif
secs = args->secs;
/*
* Linux alarm() is always successful. Limit secs to INT32_MAX / 2
* to match kern_setitimer()'s limit to avoid error from it.
*
* XXX. Linux limit secs to INT_MAX on 32 and does not limit on 64-bit
* platforms.
*/
if (secs > INT32_MAX / 2)
secs = INT32_MAX / 2;
it.it_value.tv_sec = secs;
it.it_value.tv_usec = 0;
timevalclear(&it.it_interval);
error = kern_setitimer(td, ITIMER_REAL, &it, &old_it);
KASSERT(error == 0, ("kern_setitimer returns %d", error));
if ((old_it.it_value.tv_sec == 0 && old_it.it_value.tv_usec > 0) ||
old_it.it_value.tv_usec >= 500000)
old_it.it_value.tv_sec++;
td->td_retval[0] = old_it.it_value.tv_sec;
return (0);
}
int
linux_brk(struct thread *td, struct linux_brk_args *args)
{
struct vmspace *vm = td->td_proc->p_vmspace;
vm_offset_t new, old;
struct obreak_args /* {
char * nsize;
} */ tmp;
#ifdef DEBUG
if (ldebug(brk))
printf(ARGS(brk, "%p"), (void *)(uintptr_t)args->dsend);
#endif
old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize);
new = (vm_offset_t)args->dsend;
tmp.nsize = (char *)new;
if (((caddr_t)new > vm->vm_daddr) && !sys_obreak(td, &tmp))
td->td_retval[0] = (long)new;
else
td->td_retval[0] = (long)old;
return (0);
}
#if defined(__i386__)
/* XXX: what about amd64/linux32? */
int
linux_uselib(struct thread *td, struct linux_uselib_args *args)
{
struct nameidata ni;
struct vnode *vp;
struct exec *a_out;
struct vattr attr;
vm_offset_t vmaddr;
unsigned long file_offset;
unsigned long bss_size;
char *library;
ssize_t aresid;
int error, locked, writecount;
LCONVPATHEXIST(td, args->library, &library);
#ifdef DEBUG
if (ldebug(uselib))
printf(ARGS(uselib, "%s"), library);
#endif
a_out = NULL;
locked = 0;
vp = NULL;
NDINIT(&ni, LOOKUP, ISOPEN | FOLLOW | LOCKLEAF | AUDITVNODE1,
UIO_SYSSPACE, library, td);
error = namei(&ni);
LFREEPATH(library);
if (error)
goto cleanup;
vp = ni.ni_vp;
NDFREE(&ni, NDF_ONLY_PNBUF);
/*
* From here on down, we have a locked vnode that must be unlocked.
* XXX: The code below largely duplicates exec_check_permissions().
*/
locked = 1;
/* Writable? */
error = VOP_GET_WRITECOUNT(vp, &writecount);
if (error != 0)
goto cleanup;
if (writecount != 0) {
error = ETXTBSY;
goto cleanup;
}
/* Executable? */
error = VOP_GETATTR(vp, &attr, td->td_ucred);
if (error)
goto cleanup;
if ((vp->v_mount->mnt_flag & MNT_NOEXEC) ||
((attr.va_mode & 0111) == 0) || (attr.va_type != VREG)) {
/* EACCESS is what exec(2) returns. */
error = ENOEXEC;
goto cleanup;
}
/* Sensible size? */
if (attr.va_size == 0) {
error = ENOEXEC;
goto cleanup;
}
/* Can we access it? */
error = VOP_ACCESS(vp, VEXEC, td->td_ucred, td);
if (error)
goto cleanup;
/*
* XXX: This should use vn_open() so that it is properly authorized,
* and to reduce code redundancy all over the place here.
* XXX: Not really, it duplicates far more of exec_check_permissions()
* than vn_open().
*/
#ifdef MAC
error = mac_vnode_check_open(td->td_ucred, vp, VREAD);
if (error)
goto cleanup;
#endif
error = VOP_OPEN(vp, FREAD, td->td_ucred, td, NULL);
if (error)
goto cleanup;
/* Pull in executable header into exec_map */
error = vm_mmap(exec_map, (vm_offset_t *)&a_out, PAGE_SIZE,
VM_PROT_READ, VM_PROT_READ, 0, OBJT_VNODE, vp, 0);
if (error)
goto cleanup;
/* Is it a Linux binary ? */
if (((a_out->a_magic >> 16) & 0xff) != 0x64) {
error = ENOEXEC;
goto cleanup;
}
/*
* While we are here, we should REALLY do some more checks
*/
/* Set file/virtual offset based on a.out variant. */
switch ((int)(a_out->a_magic & 0xffff)) {
case 0413: /* ZMAGIC */
file_offset = 1024;
break;
case 0314: /* QMAGIC */
file_offset = 0;
break;
default:
error = ENOEXEC;
goto cleanup;
}
bss_size = round_page(a_out->a_bss);
/* Check various fields in header for validity/bounds. */
if (a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK) {
error = ENOEXEC;
goto cleanup;
}
/* text + data can't exceed file size */
if (a_out->a_data + a_out->a_text > attr.va_size) {
error = EFAULT;
goto cleanup;
}
/*
* text/data/bss must not exceed limits
* XXX - this is not complete. it should check current usage PLUS
* the resources needed by this library.
*/
PROC_LOCK(td->td_proc);
if (a_out->a_text > maxtsiz ||
a_out->a_data + bss_size > lim_cur_proc(td->td_proc, RLIMIT_DATA) ||
racct_set(td->td_proc, RACCT_DATA, a_out->a_data +
bss_size) != 0) {
PROC_UNLOCK(td->td_proc);
error = ENOMEM;
goto cleanup;
}
PROC_UNLOCK(td->td_proc);
/*
* Prevent more writers.
* XXX: Note that if any of the VM operations fail below we don't
* clear this flag.
*/
VOP_SET_TEXT(vp);
/*
* Lock no longer needed
*/
locked = 0;
VOP_UNLOCK(vp, 0);
/*
* Check if file_offset page aligned. Currently we cannot handle
* misalinged file offsets, and so we read in the entire image
* (what a waste).
*/
if (file_offset & PAGE_MASK) {
#ifdef DEBUG
printf("uselib: Non page aligned binary %lu\n", file_offset);
#endif
/* Map text+data read/write/execute */
/* a_entry is the load address and is page aligned */
vmaddr = trunc_page(a_out->a_entry);
/* get anon user mapping, read+write+execute */
error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0,
&vmaddr, a_out->a_text + a_out->a_data, 0, VMFS_NO_SPACE,
VM_PROT_ALL, VM_PROT_ALL, 0);
if (error)
goto cleanup;
error = vn_rdwr(UIO_READ, vp, (void *)vmaddr, file_offset,
a_out->a_text + a_out->a_data, UIO_USERSPACE, 0,
td->td_ucred, NOCRED, &aresid, td);
if (error != 0)
goto cleanup;
if (aresid != 0) {
error = ENOEXEC;
goto cleanup;
}
} else {
#ifdef DEBUG
printf("uselib: Page aligned binary %lu\n", file_offset);
#endif
/*
* for QMAGIC, a_entry is 20 bytes beyond the load address
* to skip the executable header
*/
vmaddr = trunc_page(a_out->a_entry);
/*
* Map it all into the process's space as a single
* copy-on-write "data" segment.
*/
error = vm_mmap(&td->td_proc->p_vmspace->vm_map, &vmaddr,
a_out->a_text + a_out->a_data, VM_PROT_ALL, VM_PROT_ALL,
MAP_PRIVATE | MAP_FIXED, OBJT_VNODE, vp, file_offset);
if (error)
goto cleanup;
}
#ifdef DEBUG
printf("mem=%08lx = %08lx %08lx\n", (long)vmaddr, ((long *)vmaddr)[0],
((long *)vmaddr)[1]);
#endif
if (bss_size != 0) {
/* Calculate BSS start address */
vmaddr = trunc_page(a_out->a_entry) + a_out->a_text +
a_out->a_data;
/* allocate some 'anon' space */
error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0,
&vmaddr, bss_size, 0, VMFS_NO_SPACE, VM_PROT_ALL,
VM_PROT_ALL, 0);
if (error)
goto cleanup;
}
cleanup:
/* Unlock vnode if needed */
if (locked)
VOP_UNLOCK(vp, 0);
/* Release the temporary mapping. */
if (a_out)
kmap_free_wakeup(exec_map, (vm_offset_t)a_out, PAGE_SIZE);
return (error);
}
#endif /* __i386__ */
int
linux_select(struct thread *td, struct linux_select_args *args)
{
l_timeval ltv;
struct timeval tv0, tv1, utv, *tvp;
int error;
#ifdef DEBUG
if (ldebug(select))
printf(ARGS(select, "%d, %p, %p, %p, %p"), args->nfds,
(void *)args->readfds, (void *)args->writefds,
(void *)args->exceptfds, (void *)args->timeout);
#endif
/*
* Store current time for computation of the amount of
* time left.
*/
if (args->timeout) {
if ((error = copyin(args->timeout, &ltv, sizeof(ltv))))
goto select_out;
utv.tv_sec = ltv.tv_sec;
utv.tv_usec = ltv.tv_usec;
#ifdef DEBUG
if (ldebug(select))
printf(LMSG("incoming timeout (%jd/%ld)"),
(intmax_t)utv.tv_sec, utv.tv_usec);
#endif
if (itimerfix(&utv)) {
/*
* The timeval was invalid. Convert it to something
* valid that will act as it does under Linux.
*/
utv.tv_sec += utv.tv_usec / 1000000;
utv.tv_usec %= 1000000;
if (utv.tv_usec < 0) {
utv.tv_sec -= 1;
utv.tv_usec += 1000000;
}
if (utv.tv_sec < 0)
timevalclear(&utv);
}
microtime(&tv0);
tvp = &utv;
} else
tvp = NULL;
error = kern_select(td, args->nfds, args->readfds, args->writefds,
args->exceptfds, tvp, LINUX_NFDBITS);
#ifdef DEBUG
if (ldebug(select))
printf(LMSG("real select returns %d"), error);
#endif
if (error)
goto select_out;
if (args->timeout) {
if (td->td_retval[0]) {
/*
* Compute how much time was left of the timeout,
* by subtracting the current time and the time
* before we started the call, and subtracting
* that result from the user-supplied value.
*/
microtime(&tv1);
timevalsub(&tv1, &tv0);
timevalsub(&utv, &tv1);
if (utv.tv_sec < 0)
timevalclear(&utv);
} else
timevalclear(&utv);
#ifdef DEBUG
if (ldebug(select))
printf(LMSG("outgoing timeout (%jd/%ld)"),
(intmax_t)utv.tv_sec, utv.tv_usec);
#endif
ltv.tv_sec = utv.tv_sec;
ltv.tv_usec = utv.tv_usec;
if ((error = copyout(&ltv, args->timeout, sizeof(ltv))))
goto select_out;
}
select_out:
#ifdef DEBUG
if (ldebug(select))
printf(LMSG("select_out -> %d"), error);
#endif
return (error);
}
int
linux_mremap(struct thread *td, struct linux_mremap_args *args)
{
struct munmap_args /* {
void *addr;
size_t len;
} */ bsd_args;
int error = 0;
#ifdef DEBUG
if (ldebug(mremap))
printf(ARGS(mremap, "%p, %08lx, %08lx, %08lx"),
(void *)(uintptr_t)args->addr,
(unsigned long)args->old_len,
(unsigned long)args->new_len,
(unsigned long)args->flags);
#endif
if (args->flags & ~(LINUX_MREMAP_FIXED | LINUX_MREMAP_MAYMOVE)) {
td->td_retval[0] = 0;
return (EINVAL);
}
/*
* Check for the page alignment.
* Linux defines PAGE_MASK to be FreeBSD ~PAGE_MASK.
*/
if (args->addr & PAGE_MASK) {
td->td_retval[0] = 0;
return (EINVAL);
}
args->new_len = round_page(args->new_len);
args->old_len = round_page(args->old_len);
if (args->new_len > args->old_len) {
td->td_retval[0] = 0;
return (ENOMEM);
}
if (args->new_len < args->old_len) {
bsd_args.addr =
(caddr_t)((uintptr_t)args->addr + args->new_len);
bsd_args.len = args->old_len - args->new_len;
error = sys_munmap(td, &bsd_args);
}
td->td_retval[0] = error ? 0 : (uintptr_t)args->addr;
return (error);
}
#define LINUX_MS_ASYNC 0x0001
#define LINUX_MS_INVALIDATE 0x0002
#define LINUX_MS_SYNC 0x0004
int
linux_msync(struct thread *td, struct linux_msync_args *args)
{
struct msync_args bsd_args;
bsd_args.addr = (caddr_t)(uintptr_t)args->addr;
bsd_args.len = (uintptr_t)args->len;
bsd_args.flags = args->fl & ~LINUX_MS_SYNC;
return (sys_msync(td, &bsd_args));
}
int
linux_time(struct thread *td, struct linux_time_args *args)
{
struct timeval tv;
l_time_t tm;
int error;
#ifdef DEBUG
if (ldebug(time))
printf(ARGS(time, "*"));
#endif
microtime(&tv);
tm = tv.tv_sec;
if (args->tm && (error = copyout(&tm, args->tm, sizeof(tm))))
return (error);
td->td_retval[0] = tm;
return (0);
}
struct l_times_argv {
l_clock_t tms_utime;
l_clock_t tms_stime;
l_clock_t tms_cutime;
l_clock_t tms_cstime;
};
/*
* Glibc versions prior to 2.2.1 always use hard-coded CLK_TCK value.
* Since 2.2.1 Glibc uses value exported from kernel via AT_CLKTCK
* auxiliary vector entry.
*/
#define CLK_TCK 100
#define CONVOTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK))
#define CONVNTCK(r) (r.tv_sec * stclohz + r.tv_usec / (1000000 / stclohz))
#define CONVTCK(r) (linux_kernver(td) >= LINUX_KERNVER_2004000 ? \
CONVNTCK(r) : CONVOTCK(r))
int
linux_times(struct thread *td, struct linux_times_args *args)
{
struct timeval tv, utime, stime, cutime, cstime;
struct l_times_argv tms;
struct proc *p;
int error;
#ifdef DEBUG
if (ldebug(times))
printf(ARGS(times, "*"));
#endif
if (args->buf != NULL) {
p = td->td_proc;
PROC_LOCK(p);
PROC_STATLOCK(p);
calcru(p, &utime, &stime);
PROC_STATUNLOCK(p);
calccru(p, &cutime, &cstime);
PROC_UNLOCK(p);
tms.tms_utime = CONVTCK(utime);
tms.tms_stime = CONVTCK(stime);
tms.tms_cutime = CONVTCK(cutime);
tms.tms_cstime = CONVTCK(cstime);
if ((error = copyout(&tms, args->buf, sizeof(tms))))
return (error);
}
microuptime(&tv);
td->td_retval[0] = (int)CONVTCK(tv);
return (0);
}
int
linux_newuname(struct thread *td, struct linux_newuname_args *args)
{
struct l_new_utsname utsname;
char osname[LINUX_MAX_UTSNAME];
char osrelease[LINUX_MAX_UTSNAME];
char *p;
#ifdef DEBUG
if (ldebug(newuname))
printf(ARGS(newuname, "*"));
#endif
linux_get_osname(td, osname);
linux_get_osrelease(td, osrelease);
bzero(&utsname, sizeof(utsname));
strlcpy(utsname.sysname, osname, LINUX_MAX_UTSNAME);
getcredhostname(td->td_ucred, utsname.nodename, LINUX_MAX_UTSNAME);
getcreddomainname(td->td_ucred, utsname.domainname, LINUX_MAX_UTSNAME);
strlcpy(utsname.release, osrelease, LINUX_MAX_UTSNAME);
strlcpy(utsname.version, version, LINUX_MAX_UTSNAME);
for (p = utsname.version; *p != '\0'; ++p)
if (*p == '\n') {
*p = '\0';
break;
}
strlcpy(utsname.machine, linux_kplatform, LINUX_MAX_UTSNAME);
return (copyout(&utsname, args->buf, sizeof(utsname)));
}
struct l_utimbuf {
l_time_t l_actime;
l_time_t l_modtime;
};
int
linux_utime(struct thread *td, struct linux_utime_args *args)
{
struct timeval tv[2], *tvp;
struct l_utimbuf lut;
char *fname;
int error;
LCONVPATHEXIST(td, args->fname, &fname);
#ifdef DEBUG
if (ldebug(utime))
printf(ARGS(utime, "%s, *"), fname);
#endif
if (args->times) {
if ((error = copyin(args->times, &lut, sizeof lut))) {
LFREEPATH(fname);
return (error);
}
tv[0].tv_sec = lut.l_actime;
tv[0].tv_usec = 0;
tv[1].tv_sec = lut.l_modtime;
tv[1].tv_usec = 0;
tvp = tv;
} else
tvp = NULL;
error = kern_utimesat(td, AT_FDCWD, fname, UIO_SYSSPACE, tvp,
UIO_SYSSPACE);
LFREEPATH(fname);
return (error);
}
int
linux_utimes(struct thread *td, struct linux_utimes_args *args)
{
l_timeval ltv[2];
struct timeval tv[2], *tvp = NULL;
char *fname;
int error;
LCONVPATHEXIST(td, args->fname, &fname);
#ifdef DEBUG
if (ldebug(utimes))
printf(ARGS(utimes, "%s, *"), fname);
#endif
if (args->tptr != NULL) {
if ((error = copyin(args->tptr, ltv, sizeof ltv))) {
LFREEPATH(fname);
return (error);
}
tv[0].tv_sec = ltv[0].tv_sec;
tv[0].tv_usec = ltv[0].tv_usec;
tv[1].tv_sec = ltv[1].tv_sec;
tv[1].tv_usec = ltv[1].tv_usec;
tvp = tv;
}
error = kern_utimesat(td, AT_FDCWD, fname, UIO_SYSSPACE,
tvp, UIO_SYSSPACE);
LFREEPATH(fname);
return (error);
}
static int
linux_utimensat_nsec_valid(l_long nsec)
{
if (nsec == LINUX_UTIME_OMIT || nsec == LINUX_UTIME_NOW)
return (0);
if (nsec >= 0 && nsec <= 999999999)
return (0);
return (1);
}
int
linux_utimensat(struct thread *td, struct linux_utimensat_args *args)
{
struct l_timespec l_times[2];
struct timespec times[2], *timesp = NULL;
char *path = NULL;
int error, dfd, flags = 0;
dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
#ifdef DEBUG
if (ldebug(utimensat))
printf(ARGS(utimensat, "%d, *"), dfd);
#endif
if (args->flags & ~LINUX_AT_SYMLINK_NOFOLLOW)
return (EINVAL);
if (args->times != NULL) {
error = copyin(args->times, l_times, sizeof(l_times));
if (error != 0)
return (error);
if (linux_utimensat_nsec_valid(l_times[0].tv_nsec) != 0 ||
linux_utimensat_nsec_valid(l_times[1].tv_nsec) != 0)
return (EINVAL);
times[0].tv_sec = l_times[0].tv_sec;
switch (l_times[0].tv_nsec)
{
case LINUX_UTIME_OMIT:
times[0].tv_nsec = UTIME_OMIT;
break;
case LINUX_UTIME_NOW:
times[0].tv_nsec = UTIME_NOW;
break;
default:
times[0].tv_nsec = l_times[0].tv_nsec;
}
times[1].tv_sec = l_times[1].tv_sec;
switch (l_times[1].tv_nsec)
{
case LINUX_UTIME_OMIT:
times[1].tv_nsec = UTIME_OMIT;
break;
case LINUX_UTIME_NOW:
times[1].tv_nsec = UTIME_NOW;
break;
default:
times[1].tv_nsec = l_times[1].tv_nsec;
break;
}
timesp = times;
/* This breaks POSIX, but is what the Linux kernel does
* _on purpose_ (documented in the man page for utimensat(2)),
* so we must follow that behaviour. */
if (times[0].tv_nsec == UTIME_OMIT &&
times[1].tv_nsec == UTIME_OMIT)
return (0);
}
if (args->pathname != NULL)
LCONVPATHEXIST_AT(td, args->pathname, &path, dfd);
else if (args->flags != 0)
return (EINVAL);
if (args->flags & LINUX_AT_SYMLINK_NOFOLLOW)
flags |= AT_SYMLINK_NOFOLLOW;
if (path == NULL)
error = kern_futimens(td, dfd, timesp, UIO_SYSSPACE);
else {
error = kern_utimensat(td, dfd, path, UIO_SYSSPACE, timesp,
UIO_SYSSPACE, flags);
LFREEPATH(path);
}
return (error);
}
int
linux_futimesat(struct thread *td, struct linux_futimesat_args *args)
{
l_timeval ltv[2];
struct timeval tv[2], *tvp = NULL;
char *fname;
int error, dfd;
dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
LCONVPATHEXIST_AT(td, args->filename, &fname, dfd);
#ifdef DEBUG
if (ldebug(futimesat))
printf(ARGS(futimesat, "%s, *"), fname);
#endif
if (args->utimes != NULL) {
if ((error = copyin(args->utimes, ltv, sizeof ltv))) {
LFREEPATH(fname);
return (error);
}
tv[0].tv_sec = ltv[0].tv_sec;
tv[0].tv_usec = ltv[0].tv_usec;
tv[1].tv_sec = ltv[1].tv_sec;
tv[1].tv_usec = ltv[1].tv_usec;
tvp = tv;
}
error = kern_utimesat(td, dfd, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE);
LFREEPATH(fname);
return (error);
}
int
linux_common_wait(struct thread *td, int pid, int *status,
int options, struct rusage *ru)
{
int error, tmpstat;
error = kern_wait(td, pid, &tmpstat, options, ru);
if (error)
return (error);
if (status) {
tmpstat &= 0xffff;
if (WIFSIGNALED(tmpstat))
tmpstat = (tmpstat & 0xffffff80) |
bsd_to_linux_signal(WTERMSIG(tmpstat));
else if (WIFSTOPPED(tmpstat))
tmpstat = (tmpstat & 0xffff00ff) |
(bsd_to_linux_signal(WSTOPSIG(tmpstat)) << 8);
else if (WIFCONTINUED(tmpstat))
tmpstat = 0xffff;
error = copyout(&tmpstat, status, sizeof(int));
}
return (error);
}
#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
int
linux_waitpid(struct thread *td, struct linux_waitpid_args *args)
{
struct linux_wait4_args wait4_args;
#ifdef DEBUG
if (ldebug(waitpid))
printf(ARGS(waitpid, "%d, %p, %d"),
args->pid, (void *)args->status, args->options);
#endif
wait4_args.pid = args->pid;
wait4_args.status = args->status;
wait4_args.options = args->options;
wait4_args.rusage = NULL;
return (linux_wait4(td, &wait4_args));
}
#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
int
linux_wait4(struct thread *td, struct linux_wait4_args *args)
{
int error, options;
struct rusage ru, *rup;
#ifdef DEBUG
if (ldebug(wait4))
printf(ARGS(wait4, "%d, %p, %d, %p"),
args->pid, (void *)args->status, args->options,
(void *)args->rusage);
#endif
if (args->options & ~(LINUX_WUNTRACED | LINUX_WNOHANG |
LINUX_WCONTINUED | __WCLONE | __WNOTHREAD | __WALL))
return (EINVAL);
options = WEXITED;
linux_to_bsd_waitopts(args->options, &options);
if (args->rusage != NULL)
rup = &ru;
else
rup = NULL;
error = linux_common_wait(td, args->pid, args->status, options, rup);
if (error != 0)
return (error);
if (args->rusage != NULL)
error = linux_copyout_rusage(&ru, args->rusage);
return (error);
}
int
linux_waitid(struct thread *td, struct linux_waitid_args *args)
{
int status, options, sig;
struct __wrusage wru;
siginfo_t siginfo;
l_siginfo_t lsi;
idtype_t idtype;
struct proc *p;
int error;
options = 0;
linux_to_bsd_waitopts(args->options, &options);
if (options & ~(WNOHANG | WNOWAIT | WEXITED | WUNTRACED | WCONTINUED))
return (EINVAL);
if (!(options & (WEXITED | WUNTRACED | WCONTINUED)))
return (EINVAL);
switch (args->idtype) {
case LINUX_P_ALL:
idtype = P_ALL;
break;
case LINUX_P_PID:
if (args->id <= 0)
return (EINVAL);
idtype = P_PID;
break;
case LINUX_P_PGID:
if (args->id <= 0)
return (EINVAL);
idtype = P_PGID;
break;
default:
return (EINVAL);
}
error = kern_wait6(td, idtype, args->id, &status, options,
&wru, &siginfo);
if (error != 0)
return (error);
if (args->rusage != NULL) {
error = linux_copyout_rusage(&wru.wru_children,
args->rusage);
if (error != 0)
return (error);
}
if (args->info != NULL) {
p = td->td_proc;
if (td->td_retval[0] == 0)
bzero(&lsi, sizeof(lsi));
else {
sig = bsd_to_linux_signal(siginfo.si_signo);
siginfo_to_lsiginfo(&siginfo, &lsi, sig);
}
error = copyout(&lsi, args->info, sizeof(lsi));
}
td->td_retval[0] = 0;
return (error);
}
int
linux_mknod(struct thread *td, struct linux_mknod_args *args)
{
char *path;
int error;
LCONVPATHCREAT(td, args->path, &path);
#ifdef DEBUG
if (ldebug(mknod))
printf(ARGS(mknod, "%s, %d, %ju"), path, args->mode,
(uintmax_t)args->dev);
#endif
switch (args->mode & S_IFMT) {
case S_IFIFO:
case S_IFSOCK:
error = kern_mkfifoat(td, AT_FDCWD, path, UIO_SYSSPACE,
args->mode);
break;
case S_IFCHR:
case S_IFBLK:
error = kern_mknodat(td, AT_FDCWD, path, UIO_SYSSPACE,
args->mode, args->dev);
break;
case S_IFDIR:
error = EPERM;
break;
case 0:
args->mode |= S_IFREG;
/* FALLTHROUGH */
case S_IFREG:
error = kern_openat(td, AT_FDCWD, path, UIO_SYSSPACE,
O_WRONLY | O_CREAT | O_TRUNC, args->mode);
if (error == 0)
kern_close(td, td->td_retval[0]);
break;
default:
error = EINVAL;
break;
}
LFREEPATH(path);
return (error);
}
int
linux_mknodat(struct thread *td, struct linux_mknodat_args *args)
{
char *path;
int error, dfd;
dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
LCONVPATHCREAT_AT(td, args->filename, &path, dfd);
#ifdef DEBUG
if (ldebug(mknodat))
printf(ARGS(mknodat, "%s, %d, %d"), path, args->mode, args->dev);
#endif
switch (args->mode & S_IFMT) {
case S_IFIFO:
case S_IFSOCK:
error = kern_mkfifoat(td, dfd, path, UIO_SYSSPACE, args->mode);
break;
case S_IFCHR:
case S_IFBLK:
error = kern_mknodat(td, dfd, path, UIO_SYSSPACE, args->mode,
args->dev);
break;
case S_IFDIR:
error = EPERM;
break;
case 0:
args->mode |= S_IFREG;
/* FALLTHROUGH */
case S_IFREG:
error = kern_openat(td, dfd, path, UIO_SYSSPACE,
O_WRONLY | O_CREAT | O_TRUNC, args->mode);
if (error == 0)
kern_close(td, td->td_retval[0]);
break;
default:
error = EINVAL;
break;
}
LFREEPATH(path);
return (error);
}
/*
* UGH! This is just about the dumbest idea I've ever heard!!
*/
int
linux_personality(struct thread *td, struct linux_personality_args *args)
{
struct linux_pemuldata *pem;
struct proc *p = td->td_proc;
uint32_t old;
#ifdef DEBUG
if (ldebug(personality))
printf(ARGS(personality, "%u"), args->per);
#endif
PROC_LOCK(p);
pem = pem_find(p);
old = pem->persona;
if (args->per != 0xffffffff)
pem->persona = args->per;
PROC_UNLOCK(p);
td->td_retval[0] = old;
return (0);
}
struct l_itimerval {
l_timeval it_interval;
l_timeval it_value;
};
#define B2L_ITIMERVAL(bip, lip) \
(bip)->it_interval.tv_sec = (lip)->it_interval.tv_sec; \
(bip)->it_interval.tv_usec = (lip)->it_interval.tv_usec; \
(bip)->it_value.tv_sec = (lip)->it_value.tv_sec; \
(bip)->it_value.tv_usec = (lip)->it_value.tv_usec;
int
linux_setitimer(struct thread *td, struct linux_setitimer_args *uap)
{
int error;
struct l_itimerval ls;
struct itimerval aitv, oitv;
#ifdef DEBUG
if (ldebug(setitimer))
printf(ARGS(setitimer, "%p, %p"),
(void *)uap->itv, (void *)uap->oitv);
#endif
if (uap->itv == NULL) {
uap->itv = uap->oitv;
return (linux_getitimer(td, (struct linux_getitimer_args *)uap));
}
error = copyin(uap->itv, &ls, sizeof(ls));
if (error != 0)
return (error);
B2L_ITIMERVAL(&aitv, &ls);
#ifdef DEBUG
if (ldebug(setitimer)) {
printf("setitimer: value: sec: %jd, usec: %ld\n",
(intmax_t)aitv.it_value.tv_sec, aitv.it_value.tv_usec);
printf("setitimer: interval: sec: %jd, usec: %ld\n",
(intmax_t)aitv.it_interval.tv_sec, aitv.it_interval.tv_usec);
}
#endif
error = kern_setitimer(td, uap->which, &aitv, &oitv);
if (error != 0 || uap->oitv == NULL)
return (error);
B2L_ITIMERVAL(&ls, &oitv);
return (copyout(&ls, uap->oitv, sizeof(ls)));
}
int
linux_getitimer(struct thread *td, struct linux_getitimer_args *uap)
{
int error;
struct l_itimerval ls;
struct itimerval aitv;
#ifdef DEBUG
if (ldebug(getitimer))
printf(ARGS(getitimer, "%p"), (void *)uap->itv);
#endif
error = kern_getitimer(td, uap->which, &aitv);
if (error != 0)
return (error);
B2L_ITIMERVAL(&ls, &aitv);
return (copyout(&ls, uap->itv, sizeof(ls)));
}
#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
int
linux_nice(struct thread *td, struct linux_nice_args *args)
{
struct setpriority_args bsd_args;
bsd_args.which = PRIO_PROCESS;
bsd_args.who = 0; /* current process */
bsd_args.prio = args->inc;
return (sys_setpriority(td, &bsd_args));
}
#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
int
linux_setgroups(struct thread *td, struct linux_setgroups_args *args)
{
struct ucred *newcred, *oldcred;
l_gid_t *linux_gidset;
gid_t *bsd_gidset;
int ngrp, error;
struct proc *p;
ngrp = args->gidsetsize;
if (ngrp < 0 || ngrp >= ngroups_max + 1)
return (EINVAL);
linux_gidset = malloc(ngrp * sizeof(*linux_gidset), M_LINUX, M_WAITOK);
error = copyin(args->grouplist, linux_gidset, ngrp * sizeof(l_gid_t));
if (error)
goto out;
newcred = crget();
crextend(newcred, ngrp + 1);
p = td->td_proc;
PROC_LOCK(p);
oldcred = p->p_ucred;
crcopy(newcred, oldcred);
/*
* cr_groups[0] holds egid. Setting the whole set from
* the supplied set will cause egid to be changed too.
* Keep cr_groups[0] unchanged to prevent that.
*/
if ((error = priv_check_cred(oldcred, PRIV_CRED_SETGROUPS, 0)) != 0) {
PROC_UNLOCK(p);
crfree(newcred);
goto out;
}
if (ngrp > 0) {
newcred->cr_ngroups = ngrp + 1;
bsd_gidset = newcred->cr_groups;
ngrp--;
while (ngrp >= 0) {
bsd_gidset[ngrp + 1] = linux_gidset[ngrp];
ngrp--;
}
} else
newcred->cr_ngroups = 1;
setsugid(p);
proc_set_cred(p, newcred);
PROC_UNLOCK(p);
crfree(oldcred);
error = 0;
out:
free(linux_gidset, M_LINUX);
return (error);
}
int
linux_getgroups(struct thread *td, struct linux_getgroups_args *args)
{
struct ucred *cred;
l_gid_t *linux_gidset;
gid_t *bsd_gidset;
int bsd_gidsetsz, ngrp, error;
cred = td->td_ucred;
bsd_gidset = cred->cr_groups;
bsd_gidsetsz = cred->cr_ngroups - 1;
/*
* cr_groups[0] holds egid. Returning the whole set
* here will cause a duplicate. Exclude cr_groups[0]
* to prevent that.
*/
if ((ngrp = args->gidsetsize) == 0) {
td->td_retval[0] = bsd_gidsetsz;
return (0);
}
if (ngrp < bsd_gidsetsz)
return (EINVAL);
ngrp = 0;
linux_gidset = malloc(bsd_gidsetsz * sizeof(*linux_gidset),
M_LINUX, M_WAITOK);
while (ngrp < bsd_gidsetsz) {
linux_gidset[ngrp] = bsd_gidset[ngrp + 1];
ngrp++;
}
error = copyout(linux_gidset, args->grouplist, ngrp * sizeof(l_gid_t));
free(linux_gidset, M_LINUX);
if (error)
return (error);
td->td_retval[0] = ngrp;
return (0);
}
int
linux_setrlimit(struct thread *td, struct linux_setrlimit_args *args)
{
struct rlimit bsd_rlim;
struct l_rlimit rlim;
u_int which;
int error;
#ifdef DEBUG
if (ldebug(setrlimit))
printf(ARGS(setrlimit, "%d, %p"),
args->resource, (void *)args->rlim);
#endif
if (args->resource >= LINUX_RLIM_NLIMITS)
return (EINVAL);
which = linux_to_bsd_resource[args->resource];
if (which == -1)
return (EINVAL);
error = copyin(args->rlim, &rlim, sizeof(rlim));
if (error)
return (error);
bsd_rlim.rlim_cur = (rlim_t)rlim.rlim_cur;
bsd_rlim.rlim_max = (rlim_t)rlim.rlim_max;
return (kern_setrlimit(td, which, &bsd_rlim));
}
#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
int
linux_old_getrlimit(struct thread *td, struct linux_old_getrlimit_args *args)
{
struct l_rlimit rlim;
struct rlimit bsd_rlim;
u_int which;
#ifdef DEBUG
if (ldebug(old_getrlimit))
printf(ARGS(old_getrlimit, "%d, %p"),
args->resource, (void *)args->rlim);
#endif
if (args->resource >= LINUX_RLIM_NLIMITS)
return (EINVAL);
which = linux_to_bsd_resource[args->resource];
if (which == -1)
return (EINVAL);
lim_rlimit(td, which, &bsd_rlim);
#ifdef COMPAT_LINUX32
rlim.rlim_cur = (unsigned int)bsd_rlim.rlim_cur;
if (rlim.rlim_cur == UINT_MAX)
rlim.rlim_cur = INT_MAX;
rlim.rlim_max = (unsigned int)bsd_rlim.rlim_max;
if (rlim.rlim_max == UINT_MAX)
rlim.rlim_max = INT_MAX;
#else
rlim.rlim_cur = (unsigned long)bsd_rlim.rlim_cur;
if (rlim.rlim_cur == ULONG_MAX)
rlim.rlim_cur = LONG_MAX;
rlim.rlim_max = (unsigned long)bsd_rlim.rlim_max;
if (rlim.rlim_max == ULONG_MAX)
rlim.rlim_max = LONG_MAX;
#endif
return (copyout(&rlim, args->rlim, sizeof(rlim)));
}
#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
int
linux_getrlimit(struct thread *td, struct linux_getrlimit_args *args)
{
struct l_rlimit rlim;
struct rlimit bsd_rlim;
u_int which;
#ifdef DEBUG
if (ldebug(getrlimit))
printf(ARGS(getrlimit, "%d, %p"),
args->resource, (void *)args->rlim);
#endif
if (args->resource >= LINUX_RLIM_NLIMITS)
return (EINVAL);
which = linux_to_bsd_resource[args->resource];
if (which == -1)
return (EINVAL);
lim_rlimit(td, which, &bsd_rlim);
rlim.rlim_cur = (l_ulong)bsd_rlim.rlim_cur;
rlim.rlim_max = (l_ulong)bsd_rlim.rlim_max;
return (copyout(&rlim, args->rlim, sizeof(rlim)));
}
int
linux_sched_setscheduler(struct thread *td,
struct linux_sched_setscheduler_args *args)
{
struct sched_param sched_param;
struct thread *tdt;
int error, policy;
#ifdef DEBUG
if (ldebug(sched_setscheduler))
printf(ARGS(sched_setscheduler, "%d, %d, %p"),
args->pid, args->policy, (const void *)args->param);
#endif
switch (args->policy) {
case LINUX_SCHED_OTHER:
policy = SCHED_OTHER;
break;
case LINUX_SCHED_FIFO:
policy = SCHED_FIFO;
break;
case LINUX_SCHED_RR:
policy = SCHED_RR;
break;
default:
return (EINVAL);
}
error = copyin(args->param, &sched_param, sizeof(sched_param));
if (error)
return (error);
tdt = linux_tdfind(td, args->pid, -1);
if (tdt == NULL)
return (ESRCH);
error = kern_sched_setscheduler(td, tdt, policy, &sched_param);
PROC_UNLOCK(tdt->td_proc);
return (error);
}
int
linux_sched_getscheduler(struct thread *td,
struct linux_sched_getscheduler_args *args)
{
struct thread *tdt;
int error, policy;
#ifdef DEBUG
if (ldebug(sched_getscheduler))
printf(ARGS(sched_getscheduler, "%d"), args->pid);
#endif
tdt = linux_tdfind(td, args->pid, -1);
if (tdt == NULL)
return (ESRCH);
error = kern_sched_getscheduler(td, tdt, &policy);
PROC_UNLOCK(tdt->td_proc);
switch (policy) {
case SCHED_OTHER:
td->td_retval[0] = LINUX_SCHED_OTHER;
break;
case SCHED_FIFO:
td->td_retval[0] = LINUX_SCHED_FIFO;
break;
case SCHED_RR:
td->td_retval[0] = LINUX_SCHED_RR;
break;
}
return (error);
}
int
linux_sched_get_priority_max(struct thread *td,
struct linux_sched_get_priority_max_args *args)
{
struct sched_get_priority_max_args bsd;
#ifdef DEBUG
if (ldebug(sched_get_priority_max))
printf(ARGS(sched_get_priority_max, "%d"), args->policy);
#endif
switch (args->policy) {
case LINUX_SCHED_OTHER:
bsd.policy = SCHED_OTHER;
break;
case LINUX_SCHED_FIFO:
bsd.policy = SCHED_FIFO;
break;
case LINUX_SCHED_RR:
bsd.policy = SCHED_RR;
break;
default:
return (EINVAL);
}
return (sys_sched_get_priority_max(td, &bsd));
}
int
linux_sched_get_priority_min(struct thread *td,
struct linux_sched_get_priority_min_args *args)
{
struct sched_get_priority_min_args bsd;
#ifdef DEBUG
if (ldebug(sched_get_priority_min))
printf(ARGS(sched_get_priority_min, "%d"), args->policy);
#endif
switch (args->policy) {
case LINUX_SCHED_OTHER:
bsd.policy = SCHED_OTHER;
break;
case LINUX_SCHED_FIFO:
bsd.policy = SCHED_FIFO;
break;
case LINUX_SCHED_RR:
bsd.policy = SCHED_RR;
break;
default:
return (EINVAL);
}
return (sys_sched_get_priority_min(td, &bsd));
}
#define REBOOT_CAD_ON 0x89abcdef
#define REBOOT_CAD_OFF 0
#define REBOOT_HALT 0xcdef0123
#define REBOOT_RESTART 0x01234567
#define REBOOT_RESTART2 0xA1B2C3D4
#define REBOOT_POWEROFF 0x4321FEDC
#define REBOOT_MAGIC1 0xfee1dead
#define REBOOT_MAGIC2 0x28121969
#define REBOOT_MAGIC2A 0x05121996
#define REBOOT_MAGIC2B 0x16041998
int
linux_reboot(struct thread *td, struct linux_reboot_args *args)
{
struct reboot_args bsd_args;
#ifdef DEBUG
if (ldebug(reboot))
printf(ARGS(reboot, "0x%x"), args->cmd);
#endif
if (args->magic1 != REBOOT_MAGIC1)
return (EINVAL);
switch (args->magic2) {
case REBOOT_MAGIC2:
case REBOOT_MAGIC2A:
case REBOOT_MAGIC2B:
break;
default:
return (EINVAL);
}
switch (args->cmd) {
case REBOOT_CAD_ON:
case REBOOT_CAD_OFF:
return (priv_check(td, PRIV_REBOOT));
case REBOOT_HALT:
bsd_args.opt = RB_HALT;
break;
case REBOOT_RESTART:
case REBOOT_RESTART2:
bsd_args.opt = 0;
break;
case REBOOT_POWEROFF:
bsd_args.opt = RB_POWEROFF;
break;
default:
return (EINVAL);
}
return (sys_reboot(td, &bsd_args));
}
/*
* The FreeBSD native getpid(2), getgid(2) and getuid(2) also modify
* td->td_retval[1] when COMPAT_43 is defined. This clobbers registers that
* are assumed to be preserved. The following lightweight syscalls fixes
* this. See also linux_getgid16() and linux_getuid16() in linux_uid16.c
*
* linux_getpid() - MP SAFE
* linux_getgid() - MP SAFE
* linux_getuid() - MP SAFE
*/
int
linux_getpid(struct thread *td, struct linux_getpid_args *args)
{
#ifdef DEBUG
if (ldebug(getpid))
printf(ARGS(getpid, ""));
#endif
td->td_retval[0] = td->td_proc->p_pid;
return (0);
}
int
linux_gettid(struct thread *td, struct linux_gettid_args *args)
{
struct linux_emuldata *em;
#ifdef DEBUG
if (ldebug(gettid))
printf(ARGS(gettid, ""));
#endif
em = em_find(td);
KASSERT(em != NULL, ("gettid: emuldata not found.\n"));
td->td_retval[0] = em->em_tid;
return (0);
}
int
linux_getppid(struct thread *td, struct linux_getppid_args *args)
{
#ifdef DEBUG
if (ldebug(getppid))
printf(ARGS(getppid, ""));
#endif
PROC_LOCK(td->td_proc);
td->td_retval[0] = td->td_proc->p_pptr->p_pid;
PROC_UNLOCK(td->td_proc);
return (0);
}
int
linux_getgid(struct thread *td, struct linux_getgid_args *args)
{
#ifdef DEBUG
if (ldebug(getgid))
printf(ARGS(getgid, ""));
#endif
td->td_retval[0] = td->td_ucred->cr_rgid;
return (0);
}
int
linux_getuid(struct thread *td, struct linux_getuid_args *args)
{
#ifdef DEBUG
if (ldebug(getuid))
printf(ARGS(getuid, ""));
#endif
td->td_retval[0] = td->td_ucred->cr_ruid;
return (0);
}
int
linux_getsid(struct thread *td, struct linux_getsid_args *args)
{
struct getsid_args bsd;
#ifdef DEBUG
if (ldebug(getsid))
printf(ARGS(getsid, "%i"), args->pid);
#endif
bsd.pid = args->pid;
return (sys_getsid(td, &bsd));
}
int
linux_nosys(struct thread *td, struct nosys_args *ignore)
{
return (ENOSYS);
}
int
linux_getpriority(struct thread *td, struct linux_getpriority_args *args)
{
struct getpriority_args bsd_args;
int error;
#ifdef DEBUG
if (ldebug(getpriority))
printf(ARGS(getpriority, "%i, %i"), args->which, args->who);
#endif
bsd_args.which = args->which;
bsd_args.who = args->who;
error = sys_getpriority(td, &bsd_args);
td->td_retval[0] = 20 - td->td_retval[0];
return (error);
}
int
linux_sethostname(struct thread *td, struct linux_sethostname_args *args)
{
int name[2];
#ifdef DEBUG
if (ldebug(sethostname))
printf(ARGS(sethostname, "*, %i"), args->len);
#endif
name[0] = CTL_KERN;
name[1] = KERN_HOSTNAME;
return (userland_sysctl(td, name, 2, 0, 0, 0, args->hostname,
args->len, 0, 0));
}
int
linux_setdomainname(struct thread *td, struct linux_setdomainname_args *args)
{
int name[2];
#ifdef DEBUG
if (ldebug(setdomainname))
printf(ARGS(setdomainname, "*, %i"), args->len);
#endif
name[0] = CTL_KERN;
name[1] = KERN_NISDOMAINNAME;
return (userland_sysctl(td, name, 2, 0, 0, 0, args->name,
args->len, 0, 0));
}
int
linux_exit_group(struct thread *td, struct linux_exit_group_args *args)
{
#ifdef DEBUG
if (ldebug(exit_group))
printf(ARGS(exit_group, "%i"), args->error_code);
#endif
LINUX_CTR2(exit_group, "thread(%d) (%d)", td->td_tid,
args->error_code);
/*
* XXX: we should send a signal to the parent if
* SIGNAL_EXIT_GROUP is set. We ignore that (temporarily?)
* as it doesnt occur often.
*/
exit1(td, args->error_code, 0);
/* NOTREACHED */
}
#define _LINUX_CAPABILITY_VERSION 0x19980330
struct l_user_cap_header {
l_int version;
l_int pid;
};
struct l_user_cap_data {
l_int effective;
l_int permitted;
l_int inheritable;
};
int
linux_capget(struct thread *td, struct linux_capget_args *args)
{
struct l_user_cap_header luch;
struct l_user_cap_data lucd;
int error;
if (args->hdrp == NULL)
return (EFAULT);
error = copyin(args->hdrp, &luch, sizeof(luch));
if (error != 0)
return (error);
if (luch.version != _LINUX_CAPABILITY_VERSION) {
luch.version = _LINUX_CAPABILITY_VERSION;
error = copyout(&luch, args->hdrp, sizeof(luch));
if (error)
return (error);
return (EINVAL);
}
if (luch.pid)
return (EPERM);
if (args->datap) {
/*
* The current implementation doesn't support setting
* a capability (it's essentially a stub) so indicate
* that no capabilities are currently set or available
* to request.
*/
bzero (&lucd, sizeof(lucd));
error = copyout(&lucd, args->datap, sizeof(lucd));
}
return (error);
}
int
linux_capset(struct thread *td, struct linux_capset_args *args)
{
struct l_user_cap_header luch;
struct l_user_cap_data lucd;
int error;
if (args->hdrp == NULL || args->datap == NULL)
return (EFAULT);
error = copyin(args->hdrp, &luch, sizeof(luch));
if (error != 0)
return (error);
if (luch.version != _LINUX_CAPABILITY_VERSION) {
luch.version = _LINUX_CAPABILITY_VERSION;
error = copyout(&luch, args->hdrp, sizeof(luch));
if (error)
return (error);
return (EINVAL);
}
if (luch.pid)
return (EPERM);
error = copyin(args->datap, &lucd, sizeof(lucd));
if (error != 0)
return (error);
/* We currently don't support setting any capabilities. */
if (lucd.effective || lucd.permitted || lucd.inheritable) {
linux_msg(td,
"capset effective=0x%x, permitted=0x%x, "
"inheritable=0x%x is not implemented",
(int)lucd.effective, (int)lucd.permitted,
(int)lucd.inheritable);
return (EPERM);
}
return (0);
}
int
linux_prctl(struct thread *td, struct linux_prctl_args *args)
{
int error = 0, max_size;
struct proc *p = td->td_proc;
char comm[LINUX_MAX_COMM_LEN];
struct linux_emuldata *em;
int pdeath_signal;
#ifdef DEBUG
if (ldebug(prctl))
printf(ARGS(prctl, "%d, %ju, %ju, %ju, %ju"), args->option,
(uintmax_t)args->arg2, (uintmax_t)args->arg3,
(uintmax_t)args->arg4, (uintmax_t)args->arg5);
#endif
switch (args->option) {
case LINUX_PR_SET_PDEATHSIG:
if (!LINUX_SIG_VALID(args->arg2))
return (EINVAL);
em = em_find(td);
KASSERT(em != NULL, ("prctl: emuldata not found.\n"));
em->pdeath_signal = args->arg2;
break;
case LINUX_PR_GET_PDEATHSIG:
em = em_find(td);
KASSERT(em != NULL, ("prctl: emuldata not found.\n"));
pdeath_signal = em->pdeath_signal;
error = copyout(&pdeath_signal,
(void *)(register_t)args->arg2,
sizeof(pdeath_signal));
break;
case LINUX_PR_GET_KEEPCAPS:
/*
* Indicate that we always clear the effective and
* permitted capability sets when the user id becomes
* non-zero (actually the capability sets are simply
* always zero in the current implementation).
*/
td->td_retval[0] = 0;
break;
case LINUX_PR_SET_KEEPCAPS:
/*
* Ignore requests to keep the effective and permitted
* capability sets when the user id becomes non-zero.
*/
break;
case LINUX_PR_SET_NAME:
/*
* To be on the safe side we need to make sure to not
* overflow the size a linux program expects. We already
* do this here in the copyin, so that we don't need to
* check on copyout.
*/
max_size = MIN(sizeof(comm), sizeof(p->p_comm));
error = copyinstr((void *)(register_t)args->arg2, comm,
max_size, NULL);
/* Linux silently truncates the name if it is too long. */
if (error == ENAMETOOLONG) {
/*
* XXX: copyinstr() isn't documented to populate the
* array completely, so do a copyin() to be on the
* safe side. This should be changed in case
* copyinstr() is changed to guarantee this.
*/
error = copyin((void *)(register_t)args->arg2, comm,
max_size - 1);
comm[max_size - 1] = '\0';
}
if (error)
return (error);
PROC_LOCK(p);
strlcpy(p->p_comm, comm, sizeof(p->p_comm));
PROC_UNLOCK(p);
break;
case LINUX_PR_GET_NAME:
PROC_LOCK(p);
strlcpy(comm, p->p_comm, sizeof(comm));
PROC_UNLOCK(p);
error = copyout(comm, (void *)(register_t)args->arg2,
strlen(comm) + 1);
break;
default:
error = EINVAL;
break;
}
return (error);
}
int
linux_sched_setparam(struct thread *td,
struct linux_sched_setparam_args *uap)
{
struct sched_param sched_param;
struct thread *tdt;
int error;
#ifdef DEBUG
if (ldebug(sched_setparam))
printf(ARGS(sched_setparam, "%d, *"), uap->pid);
#endif
error = copyin(uap->param, &sched_param, sizeof(sched_param));
if (error)
return (error);
tdt = linux_tdfind(td, uap->pid, -1);
if (tdt == NULL)
return (ESRCH);
error = kern_sched_setparam(td, tdt, &sched_param);
PROC_UNLOCK(tdt->td_proc);
return (error);
}
int
linux_sched_getparam(struct thread *td,
struct linux_sched_getparam_args *uap)
{
struct sched_param sched_param;
struct thread *tdt;
int error;
#ifdef DEBUG
if (ldebug(sched_getparam))
printf(ARGS(sched_getparam, "%d, *"), uap->pid);
#endif
tdt = linux_tdfind(td, uap->pid, -1);
if (tdt == NULL)
return (ESRCH);
error = kern_sched_getparam(td, tdt, &sched_param);
PROC_UNLOCK(tdt->td_proc);
if (error == 0)
error = copyout(&sched_param, uap->param,
sizeof(sched_param));
return (error);
}
/*
* Get affinity of a process.
*/
int
linux_sched_getaffinity(struct thread *td,
struct linux_sched_getaffinity_args *args)
{
int error;
struct thread *tdt;
struct cpuset_getaffinity_args cga;
#ifdef DEBUG
if (ldebug(sched_getaffinity))
printf(ARGS(sched_getaffinity, "%d, %d, *"), args->pid,
args->len);
#endif
if (args->len < sizeof(cpuset_t))
return (EINVAL);
tdt = linux_tdfind(td, args->pid, -1);
if (tdt == NULL)
return (ESRCH);
PROC_UNLOCK(tdt->td_proc);
cga.level = CPU_LEVEL_WHICH;
cga.which = CPU_WHICH_TID;
cga.id = tdt->td_tid;
cga.cpusetsize = sizeof(cpuset_t);
cga.mask = (cpuset_t *) args->user_mask_ptr;
if ((error = sys_cpuset_getaffinity(td, &cga)) == 0)
td->td_retval[0] = sizeof(cpuset_t);
return (error);
}
/*
* Set affinity of a process.
*/
int
linux_sched_setaffinity(struct thread *td,
struct linux_sched_setaffinity_args *args)
{
struct cpuset_setaffinity_args csa;
struct thread *tdt;
#ifdef DEBUG
if (ldebug(sched_setaffinity))
printf(ARGS(sched_setaffinity, "%d, %d, *"), args->pid,
args->len);
#endif
if (args->len < sizeof(cpuset_t))
return (EINVAL);
tdt = linux_tdfind(td, args->pid, -1);
if (tdt == NULL)
return (ESRCH);
PROC_UNLOCK(tdt->td_proc);
csa.level = CPU_LEVEL_WHICH;
csa.which = CPU_WHICH_TID;
csa.id = tdt->td_tid;
csa.cpusetsize = sizeof(cpuset_t);
csa.mask = (cpuset_t *) args->user_mask_ptr;
return (sys_cpuset_setaffinity(td, &csa));
}
struct linux_rlimit64 {
uint64_t rlim_cur;
uint64_t rlim_max;
};
int
linux_prlimit64(struct thread *td, struct linux_prlimit64_args *args)
{
struct rlimit rlim, nrlim;
struct linux_rlimit64 lrlim;
struct proc *p;
u_int which;
int flags;
int error;
#ifdef DEBUG
if (ldebug(prlimit64))
printf(ARGS(prlimit64, "%d, %d, %p, %p"), args->pid,
args->resource, (void *)args->new, (void *)args->old);
#endif
if (args->resource >= LINUX_RLIM_NLIMITS)
return (EINVAL);
which = linux_to_bsd_resource[args->resource];
if (which == -1)
return (EINVAL);
if (args->new != NULL) {
/*
* Note. Unlike FreeBSD where rlim is signed 64-bit Linux
* rlim is unsigned 64-bit. FreeBSD treats negative limits
* as INFINITY so we do not need a conversion even.
*/
error = copyin(args->new, &nrlim, sizeof(nrlim));
if (error != 0)
return (error);
}
flags = PGET_HOLD | PGET_NOTWEXIT;
if (args->new != NULL)
flags |= PGET_CANDEBUG;
else
flags |= PGET_CANSEE;
error = pget(args->pid, flags, &p);
if (error != 0)
return (error);
if (args->old != NULL) {
PROC_LOCK(p);
lim_rlimit_proc(p, which, &rlim);
PROC_UNLOCK(p);
if (rlim.rlim_cur == RLIM_INFINITY)
lrlim.rlim_cur = LINUX_RLIM_INFINITY;
else
lrlim.rlim_cur = rlim.rlim_cur;
if (rlim.rlim_max == RLIM_INFINITY)
lrlim.rlim_max = LINUX_RLIM_INFINITY;
else
lrlim.rlim_max = rlim.rlim_max;
error = copyout(&lrlim, args->old, sizeof(lrlim));
if (error != 0)
goto out;
}
if (args->new != NULL)
error = kern_proc_setrlimit(td, p, which, &nrlim);
out:
PRELE(p);
return (error);
}
int
linux_pselect6(struct thread *td, struct linux_pselect6_args *args)
{
struct timeval utv, tv0, tv1, *tvp;
struct l_pselect6arg lpse6;
struct l_timespec lts;
struct timespec uts;
l_sigset_t l_ss;
sigset_t *ssp;
sigset_t ss;
int error;
ssp = NULL;
if (args->sig != NULL) {
error = copyin(args->sig, &lpse6, sizeof(lpse6));
if (error != 0)
return (error);
if (lpse6.ss_len != sizeof(l_ss))
return (EINVAL);
if (lpse6.ss != 0) {
error = copyin(PTRIN(lpse6.ss), &l_ss,
sizeof(l_ss));
if (error != 0)
return (error);
linux_to_bsd_sigset(&l_ss, &ss);
ssp = &ss;
}
}
/*
* Currently glibc changes nanosecond number to microsecond.
* This mean losing precision but for now it is hardly seen.
*/
if (args->tsp != NULL) {
error = copyin(args->tsp, &lts, sizeof(lts));
if (error != 0)
return (error);
error = linux_to_native_timespec(&uts, &lts);
if (error != 0)
return (error);
TIMESPEC_TO_TIMEVAL(&utv, &uts);
if (itimerfix(&utv))
return (EINVAL);
microtime(&tv0);
tvp = &utv;
} else
tvp = NULL;
error = kern_pselect(td, args->nfds, args->readfds, args->writefds,
args->exceptfds, tvp, ssp, LINUX_NFDBITS);
if (error == 0 && args->tsp != NULL) {
if (td->td_retval[0] != 0) {
/*
* Compute how much time was left of the timeout,
* by subtracting the current time and the time
* before we started the call, and subtracting
* that result from the user-supplied value.
*/
microtime(&tv1);
timevalsub(&tv1, &tv0);
timevalsub(&utv, &tv1);
if (utv.tv_sec < 0)
timevalclear(&utv);
} else
timevalclear(&utv);
TIMEVAL_TO_TIMESPEC(&utv, &uts);
native_to_linux_timespec(&lts, &uts);
error = copyout(&lts, args->tsp, sizeof(lts));
}
return (error);
}
int
linux_ppoll(struct thread *td, struct linux_ppoll_args *args)
{
struct timespec ts0, ts1;
struct l_timespec lts;
struct timespec uts, *tsp;
l_sigset_t l_ss;
sigset_t *ssp;
sigset_t ss;
int error;
if (args->sset != NULL) {
if (args->ssize != sizeof(l_ss))
return (EINVAL);
error = copyin(args->sset, &l_ss, sizeof(l_ss));
if (error)
return (error);
linux_to_bsd_sigset(&l_ss, &ss);
ssp = &ss;
} else
ssp = NULL;
if (args->tsp != NULL) {
error = copyin(args->tsp, &lts, sizeof(lts));
if (error)
return (error);
error = linux_to_native_timespec(&uts, &lts);
if (error != 0)
return (error);
nanotime(&ts0);
tsp = &uts;
} else
tsp = NULL;
error = kern_poll(td, args->fds, args->nfds, tsp, ssp);
if (error == 0 && args->tsp != NULL) {
if (td->td_retval[0]) {
nanotime(&ts1);
timespecsub(&ts1, &ts0);
timespecsub(&uts, &ts1);
if (uts.tv_sec < 0)
timespecclear(&uts);
} else
timespecclear(&uts);
native_to_linux_timespec(&lts, &uts);
error = copyout(&lts, args->tsp, sizeof(lts));
}
return (error);
}
#if defined(DEBUG) || defined(KTR)
/* XXX: can be removed when every ldebug(...) and KTR stuff are removed. */
#ifdef COMPAT_LINUX32
#define L_MAXSYSCALL LINUX32_SYS_MAXSYSCALL
#else
#define L_MAXSYSCALL LINUX_SYS_MAXSYSCALL
#endif
u_char linux_debug_map[howmany(L_MAXSYSCALL, sizeof(u_char))];
static int
linux_debug(int syscall, int toggle, int global)
{
if (global) {
char c = toggle ? 0 : 0xff;
memset(linux_debug_map, c, sizeof(linux_debug_map));
return (0);
}
if (syscall < 0 || syscall >= L_MAXSYSCALL)
return (EINVAL);
if (toggle)
clrbit(linux_debug_map, syscall);
else
setbit(linux_debug_map, syscall);
return (0);
}
#undef L_MAXSYSCALL
/*
* Usage: sysctl linux.debug=<syscall_nr>.<0/1>
*
* E.g.: sysctl linux.debug=21.0
*
* As a special case, syscall "all" will apply to all syscalls globally.
*/
#define LINUX_MAX_DEBUGSTR 16
int
linux_sysctl_debug(SYSCTL_HANDLER_ARGS)
{
char value[LINUX_MAX_DEBUGSTR], *p;
int error, sysc, toggle;
int global = 0;
value[0] = '\0';
error = sysctl_handle_string(oidp, value, LINUX_MAX_DEBUGSTR, req);
if (error || req->newptr == NULL)
return (error);
for (p = value; *p != '\0' && *p != '.'; p++);
if (*p == '\0')
return (EINVAL);
*p++ = '\0';
sysc = strtol(value, NULL, 0);
toggle = strtol(p, NULL, 0);
if (strcmp(value, "all") == 0)
global = 1;
error = linux_debug(sysc, toggle, global);
return (error);
}
#endif /* DEBUG || KTR */
int
linux_sched_rr_get_interval(struct thread *td,
struct linux_sched_rr_get_interval_args *uap)
{
struct timespec ts;
struct l_timespec lts;
struct thread *tdt;
int error;
/*
* According to man in case the invalid pid specified
* EINVAL should be returned.
*/
if (uap->pid < 0)
return (EINVAL);
tdt = linux_tdfind(td, uap->pid, -1);
if (tdt == NULL)
return (ESRCH);
error = kern_sched_rr_get_interval_td(td, tdt, &ts);
PROC_UNLOCK(tdt->td_proc);
if (error != 0)
return (error);
native_to_linux_timespec(&lts, &ts);
return (copyout(&lts, uap->interval, sizeof(lts)));
}
/*
* In case when the Linux thread is the initial thread in
* the thread group thread id is equal to the process id.
* Glibc depends on this magic (assert in pthread_getattr_np.c).
*/
struct thread *
linux_tdfind(struct thread *td, lwpid_t tid, pid_t pid)
{
struct linux_emuldata *em;
struct thread *tdt;
struct proc *p;
tdt = NULL;
if (tid == 0 || tid == td->td_tid) {
tdt = td;
PROC_LOCK(tdt->td_proc);
} else if (tid > PID_MAX)
tdt = tdfind(tid, pid);
else {
/*
* Initial thread where the tid equal to the pid.
*/
p = pfind(tid);
if (p != NULL) {
if (SV_PROC_ABI(p) != SV_ABI_LINUX) {
/*
* p is not a Linuxulator process.
*/
PROC_UNLOCK(p);
return (NULL);
}
FOREACH_THREAD_IN_PROC(p, tdt) {
em = em_find(tdt);
if (tid == em->em_tid)
return (tdt);
}
PROC_UNLOCK(p);
}
return (NULL);
}
return (tdt);
}
void
linux_to_bsd_waitopts(int options, int *bsdopts)
{
if (options & LINUX_WNOHANG)
*bsdopts |= WNOHANG;
if (options & LINUX_WUNTRACED)
*bsdopts |= WUNTRACED;
if (options & LINUX_WEXITED)
*bsdopts |= WEXITED;
if (options & LINUX_WCONTINUED)
*bsdopts |= WCONTINUED;
if (options & LINUX_WNOWAIT)
*bsdopts |= WNOWAIT;
if (options & __WCLONE)
*bsdopts |= WLINUXCLONE;
}
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