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freebsd-dev/sys/compat/linux/linux_misc.c
Konstantin Belousov 5c7bebf961 The process spin lock currently has the following distinct uses: 
- Threads lifetime cycle, in particular, counting of the threads in
  the process, and interlocking with process mutex and thread lock.
  The main reason of this is that turnstile locks are after thread
  locks, so you e.g. cannot unlock blockable mutex (think process
  mutex) while owning thread lock.

- Virtual and profiling itimers, since the timers activation is done
  from the clock interrupt context.  Replace the p_slock by p_itimmtx
  and PROC_ITIMLOCK().

- Profiling code (profil(2)), for similar reason.  Replace the p_slock
  by p_profmtx and PROC_PROFLOCK().

- Resource usage accounting.  Need for the spinlock there is subtle,
  my understanding is that spinlock blocks context switching for the
  current thread, which prevents td_runtime and similar fields from
  changing (updates are done at the mi_switch()).  Replace the p_slock
  by p_statmtx and PROC_STATLOCK().

The split is done mostly for code clarity, and should not affect
scalability.

Tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
2014-11-26 14:10:00 +00:00

1931 lines
43 KiB
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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_util.h>
#include <compat/linux/linux_sysproto.h>
#include <compat/linux/linux_emul.h>
#include <compat/linux/linux_misc.h>
/* DTrace init */
LIN_SDT_PROVIDER_DECLARE(LINUX_DTRACE);
/* Linuxulator-global DTrace probes */
LIN_SDT_PROBE_DECLARE(locks, emul_lock, locked);
LIN_SDT_PROBE_DECLARE(locks, emul_lock, unlock);
LIN_SDT_PROBE_DECLARE(locks, emul_shared_rlock, locked);
LIN_SDT_PROBE_DECLARE(locks, emul_shared_rlock, unlock);
LIN_SDT_PROBE_DECLARE(locks, emul_shared_wlock, locked);
LIN_SDT_PROBE_DECLARE(locks, emul_shared_wlock, unlock);
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 */
};
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;
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;
if (secs > INT_MAX)
secs = INT_MAX;
it.it_value.tv_sec = (long) secs;
it.it_value.tv_usec = 0;
it.it_interval.tv_sec = 0;
it.it_interval.tv_usec = 0;
error = kern_setitimer(td, ITIMER_REAL, &it, &old_it);
if (error)
return (error);
if (timevalisset(&old_it.it_value)) {
if (old_it.it_value.tv_usec != 0)
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(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, sizeof(l_int) * 8);
#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_platform, LINUX_MAX_UTSNAME);
return (copyout(&utsname, args->buf, sizeof(utsname)));
}
#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
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);
}
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);
}
#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
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);
error = copyout(&tmpstat, status, sizeof(int));
}
return (error);
}
int
linux_waitpid(struct thread *td, struct linux_waitpid_args *args)
{
int options;
#ifdef DEBUG
if (ldebug(waitpid))
printf(ARGS(waitpid, "%d, %p, %d"),
args->pid, (void *)args->status, args->options);
#endif
/*
* this is necessary because the test in kern_wait doesn't work
* because we mess with the options here
*/
if (args->options & ~(WUNTRACED | WNOHANG | WCONTINUED | __WCLONE))
return (EINVAL);
options = (args->options & (WNOHANG | WUNTRACED));
/* WLINUXCLONE should be equal to __WCLONE, but we make sure */
if (args->options & __WCLONE)
options |= WLINUXCLONE;
return (linux_common_wait(td, args->pid, args->status, options, NULL));
}
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, %d"), path, args->mode, 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)
{
#ifdef DEBUG
if (ldebug(personality))
printf(ARGS(personality, "%lu"), (unsigned long)args->per);
#endif
if (args->per != 0)
return (EINVAL);
/* Yes Jim, it's still a Linux... */
td->td_retval[0] = 0;
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)));
}
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));
}
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_TEMP, M_WAITOK);
error = copyin(args->grouplist, linux_gidset, ngrp * sizeof(l_gid_t));
if (error)
goto out;
newcred = crget();
p = td->td_proc;
PROC_LOCK(p);
oldcred = crcopysafe(p, newcred);
/*
* 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);
p->p_ucred = newcred;
PROC_UNLOCK(p);
crfree(oldcred);
error = 0;
out:
free(linux_gidset, M_TEMP);
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_TEMP, 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_TEMP);
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));
}
int
linux_old_getrlimit(struct thread *td, struct linux_old_getrlimit_args *args)
{
struct l_rlimit rlim;
struct proc *p = td->td_proc;
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);
PROC_LOCK(p);
lim_rlimit(p, which, &bsd_rlim);
PROC_UNLOCK(p);
#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)));
}
int
linux_getrlimit(struct thread *td, struct linux_getrlimit_args *args)
{
struct l_rlimit rlim;
struct proc *p = td->td_proc;
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);
PROC_LOCK(p);
lim_rlimit(p, which, &bsd_rlim);
PROC_UNLOCK(p);
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_setscheduler_args bsd;
#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:
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);
}
bsd.pid = args->pid;
bsd.param = (struct sched_param *)args->param;
return (sys_sched_setscheduler(td, &bsd));
}
int
linux_sched_getscheduler(struct thread *td,
struct linux_sched_getscheduler_args *args)
{
struct sched_getscheduler_args bsd;
int error;
#ifdef DEBUG
if (ldebug(sched_getscheduler))
printf(ARGS(sched_getscheduler, "%d"), args->pid);
#endif
bsd.pid = args->pid;
error = sys_sched_getscheduler(td, &bsd);
switch (td->td_retval[0]) {
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)
{
struct linux_emuldata *em;
#ifdef DEBUG
if (ldebug(getpid))
printf(ARGS(getpid, ""));
#endif
if (linux_use26(td)) {
em = em_find(td->td_proc, EMUL_DONTLOCK);
KASSERT(em != NULL, ("getpid: emuldata not found.\n"));
td->td_retval[0] = em->shared->group_pid;
} else {
td->td_retval[0] = td->td_proc->p_pid;
}
return (0);
}
int
linux_gettid(struct thread *td, struct linux_gettid_args *args)
{
#ifdef DEBUG
if (ldebug(gettid))
printf(ARGS(gettid, ""));
#endif
td->td_retval[0] = td->td_proc->p_pid;
return (0);
}
int
linux_getppid(struct thread *td, struct linux_getppid_args *args)
{
struct linux_emuldata *em;
struct proc *p, *pp;
#ifdef DEBUG
if (ldebug(getppid))
printf(ARGS(getppid, ""));
#endif
if (!linux_use26(td)) {
PROC_LOCK(td->td_proc);
td->td_retval[0] = td->td_proc->p_pptr->p_pid;
PROC_UNLOCK(td->td_proc);
return (0);
}
em = em_find(td->td_proc, EMUL_DONTLOCK);
KASSERT(em != NULL, ("getppid: process emuldata not found.\n"));
/* find the group leader */
p = pfind(em->shared->group_pid);
if (p == NULL) {
#ifdef DEBUG
printf(LMSG("parent process not found.\n"));
#endif
return (0);
}
pp = p->p_pptr; /* switch to parent */
PROC_LOCK(pp);
PROC_UNLOCK(p);
/* if its also linux process */
if (pp->p_sysent == &elf_linux_sysvec) {
em = em_find(pp, EMUL_DONTLOCK);
KASSERT(em != NULL, ("getppid: parent emuldata not found.\n"));
td->td_retval[0] = em->shared->group_pid;
} else
td->td_retval[0] = pp->p_pid;
PROC_UNLOCK(pp);
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)
{
struct linux_emuldata *em;
#ifdef DEBUG
if (ldebug(exit_group))
printf(ARGS(exit_group, "%i"), args->error_code);
#endif
em = em_find(td->td_proc, EMUL_DONTLOCK);
if (em->shared->refs > 1) {
EMUL_SHARED_WLOCK(&emul_shared_lock);
em->shared->flags |= EMUL_SHARED_HASXSTAT;
em->shared->xstat = W_EXITCODE(args->error_code, 0);
EMUL_SHARED_WUNLOCK(&emul_shared_lock);
if (linux_use26(td))
linux_kill_threads(td, SIGKILL);
}
/*
* 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, W_EXITCODE(args->error_code, 0));
return (0);
}
#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, %d, %d, %d, %d"), args->option,
args->arg2, args->arg3, args->arg4, args->arg5);
#endif
switch (args->option) {
case LINUX_PR_SET_PDEATHSIG:
if (!LINUX_SIG_VALID(args->arg2))
return (EINVAL);
em = em_find(p, EMUL_DOLOCK);
KASSERT(em != NULL, ("prctl: emuldata not found.\n"));
em->pdeath_signal = args->arg2;
EMUL_UNLOCK(&emul_lock);
break;
case LINUX_PR_GET_PDEATHSIG:
em = em_find(p, EMUL_DOLOCK);
KASSERT(em != NULL, ("prctl: emuldata not found.\n"));
pdeath_signal = em->pdeath_signal;
EMUL_UNLOCK(&emul_lock);
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);
}
/*
* Get affinity of a process.
*/
int
linux_sched_getaffinity(struct thread *td,
struct linux_sched_getaffinity_args *args)
{
int error;
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);
cga.level = CPU_LEVEL_WHICH;
cga.which = CPU_WHICH_PID;
cga.id = args->pid;
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;
#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);
csa.level = CPU_LEVEL_WHICH;
csa.which = CPU_WHICH_PID;
csa.id = args->pid;
csa.cpusetsize = sizeof(cpuset_t);
csa.mask = (cpuset_t *) args->user_mask_ptr;
return (sys_cpuset_setaffinity(td, &csa));
}
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