NetBSD-5.0.2/sys/compat/linux/common/linux_misc_notalpha.c
/* $NetBSD: linux_misc_notalpha.c,v 1.104 2008/10/03 22:39:36 njoly Exp $ */
/*-
* Copyright (c) 1995, 1998, 2008 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Frank van der Linden and Eric Haszlakiewicz; by Jason R. Thorpe
* of the Numerical Aerospace Simulation Facility, NASA Ames Research Center.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: linux_misc_notalpha.c,v 1.104 2008/10/03 22:39:36 njoly Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/mman.h>
#include <sys/mount.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/namei.h>
#include <sys/proc.h>
#include <sys/prot.h>
#include <sys/ptrace.h>
#include <sys/resource.h>
#include <sys/resourcevar.h>
#include <sys/time.h>
#include <sys/vfs_syscalls.h>
#include <sys/wait.h>
#include <sys/kauth.h>
#include <sys/syscallargs.h>
#include <compat/linux/common/linux_types.h>
#include <compat/linux/common/linux_fcntl.h>
#include <compat/linux/common/linux_misc.h>
#include <compat/linux/common/linux_mmap.h>
#include <compat/linux/common/linux_signal.h>
#include <compat/linux/common/linux_util.h>
#include <compat/linux/common/linux_ipc.h>
#include <compat/linux/common/linux_sem.h>
#include <compat/linux/linux_syscallargs.h>
/*
* This file contains routines which are used
* on every linux architechture except the Alpha.
*/
/* Used on: arm, i386, m68k, mips, ppc, sparc, sparc64 */
/* Not used on: alpha */
#ifdef DEBUG_LINUX
#define DPRINTF(a) uprintf a
#else
#define DPRINTF(a)
#endif
#ifndef COMPAT_LINUX32
#if !defined(__m68k__) && !defined(__amd64__)
static void bsd_to_linux_statfs64(const struct statvfs *,
struct linux_statfs64 *);
#endif
/*
* Alarm. This is a libc call which uses setitimer(2) in NetBSD.
* Fiddle with the timers to make it work.
*
* XXX This shouldn't be dicking about with the ptimer stuff directly.
*/
int
linux_sys_alarm(struct lwp *l, const struct linux_sys_alarm_args *uap, register_t *retval)
{
/* {
syscallarg(unsigned int) secs;
} */
struct proc *p = l->l_proc;
struct timespec now;
struct itimerspec *itp, it;
struct ptimer *ptp, *spare;
extern kmutex_t timer_lock;
struct ptimers *pts;
if ((pts = p->p_timers) == NULL)
pts = timers_alloc(p);
spare = NULL;
retry:
mutex_spin_enter(&timer_lock);
if (pts && pts->pts_timers[ITIMER_REAL])
itp = &pts->pts_timers[ITIMER_REAL]->pt_time;
else
itp = NULL;
/*
* Clear any pending timer alarms.
*/
if (itp) {
callout_stop(&pts->pts_timers[ITIMER_REAL]->pt_ch);
timespecclear(&itp->it_interval);
getnanotime(&now);
if (timespecisset(&itp->it_value) &&
timespeccmp(&itp->it_value, &now, >))
timespecsub(&itp->it_value, &now, &itp->it_value);
/*
* Return how many seconds were left (rounded up)
*/
retval[0] = itp->it_value.tv_sec;
if (itp->it_value.tv_nsec)
retval[0]++;
} else {
retval[0] = 0;
}
/*
* alarm(0) just resets the timer.
*/
if (SCARG(uap, secs) == 0) {
if (itp)
timespecclear(&itp->it_value);
mutex_spin_exit(&timer_lock);
return 0;
}
/*
* Check the new alarm time for sanity, and set it.
*/
timespecclear(&it.it_interval);
it.it_value.tv_sec = SCARG(uap, secs);
it.it_value.tv_nsec = 0;
if (itimespecfix(&it.it_value) || itimespecfix(&it.it_interval)) {
mutex_spin_exit(&timer_lock);
return (EINVAL);
}
ptp = pts->pts_timers[ITIMER_REAL];
if (ptp == NULL) {
if (spare == NULL) {
mutex_spin_exit(&timer_lock);
spare = pool_get(&ptimer_pool, PR_WAITOK);
goto retry;
}
ptp = spare;
spare = NULL;
ptp->pt_ev.sigev_notify = SIGEV_SIGNAL;
ptp->pt_ev.sigev_signo = SIGALRM;
ptp->pt_overruns = 0;
ptp->pt_proc = p;
ptp->pt_type = CLOCK_REALTIME;
ptp->pt_entry = CLOCK_REALTIME;
ptp->pt_active = 0;
ptp->pt_queued = 0;
callout_init(&ptp->pt_ch, CALLOUT_MPSAFE);
pts->pts_timers[ITIMER_REAL] = ptp;
}
if (timespecisset(&it.it_value)) {
/*
* Don't need to check tvhzto() return value, here.
* callout_reset() does it for us.
*/
getnanotime(&now);
timespecadd(&it.it_value, &now, &it.it_value);
callout_reset(&ptp->pt_ch, tshzto(&it.it_value),
realtimerexpire, ptp);
}
ptp->pt_time = it;
mutex_spin_exit(&timer_lock);
return 0;
}
#endif /* !COMPAT_LINUX32 */
#if !defined(__amd64__)
int
linux_sys_nice(struct lwp *l, const struct linux_sys_nice_args *uap, register_t *retval)
{
/* {
syscallarg(int) incr;
} */
struct proc *p = l->l_proc;
struct sys_setpriority_args bsa;
SCARG(&bsa, which) = PRIO_PROCESS;
SCARG(&bsa, who) = 0;
SCARG(&bsa, prio) = p->p_nice - NZERO + SCARG(uap, incr);
return sys_setpriority(l, &bsa, retval);
}
#endif /* !__amd64__ */
#ifndef COMPAT_LINUX32
#ifndef __amd64__
/*
* The old Linux readdir was only able to read one entry at a time,
* even though it had a 'count' argument. In fact, the emulation
* of the old call was better than the original, because it did handle
* the count arg properly. Don't bother with it anymore now, and use
* it to distinguish between old and new. The difference is that the
* newer one actually does multiple entries, and the reclen field
* really is the reclen, not the namelength.
*/
int
linux_sys_readdir(struct lwp *l, const struct linux_sys_readdir_args *uap, register_t *retval)
{
/* {
syscallarg(int) fd;
syscallarg(struct linux_dirent *) dent;
syscallarg(unsigned int) count;
} */
int error;
struct linux_sys_getdents_args da;
SCARG(&da, fd) = SCARG(uap, fd);
SCARG(&da, dent) = SCARG(uap, dent);
SCARG(&da, count) = 1;
error = linux_sys_getdents(l, &da, retval);
if (error == 0 && *retval > 1)
*retval = 1;
return error;
}
#endif /* !amd64 */
/*
* I wonder why Linux has gettimeofday() _and_ time().. Still, we
* need to deal with it.
*/
int
linux_sys_time(struct lwp *l, const struct linux_sys_time_args *uap, register_t *retval)
{
/* {
syscallarg(linux_time_t) *t;
} */
struct timeval atv;
linux_time_t tt;
int error;
microtime(&atv);
tt = atv.tv_sec;
if (SCARG(uap, t) && (error = copyout(&tt, SCARG(uap, t), sizeof tt)))
return error;
retval[0] = tt;
return 0;
}
/*
* utime(). Do conversion to things that utimes() understands,
* and pass it on.
*/
int
linux_sys_utime(struct lwp *l, const struct linux_sys_utime_args *uap, register_t *retval)
{
/* {
syscallarg(const char *) path;
syscallarg(struct linux_utimbuf *)times;
} */
int error;
struct timeval tv[2], *tvp;
struct linux_utimbuf lut;
if (SCARG(uap, times) != NULL) {
if ((error = copyin(SCARG(uap, times), &lut, sizeof lut)))
return error;
tv[0].tv_usec = tv[1].tv_usec = 0;
tv[0].tv_sec = lut.l_actime;
tv[1].tv_sec = lut.l_modtime;
tvp = tv;
} else
tvp = NULL;
return do_sys_utimes(l, NULL, SCARG(uap, path), FOLLOW,
tvp, UIO_SYSSPACE);
}
#ifndef __amd64__
/*
* waitpid(2). Just forward on to linux_sys_wait4 with a NULL rusage.
*/
int
linux_sys_waitpid(struct lwp *l, const struct linux_sys_waitpid_args *uap, register_t *retval)
{
/* {
syscallarg(int) pid;
syscallarg(int *) status;
syscallarg(int) options;
} */
struct linux_sys_wait4_args linux_w4a;
SCARG(&linux_w4a, pid) = SCARG(uap, pid);
SCARG(&linux_w4a, status) = SCARG(uap, status);
SCARG(&linux_w4a, options) = SCARG(uap, options);
SCARG(&linux_w4a, rusage) = NULL;
return linux_sys_wait4(l, &linux_w4a, retval);
}
#endif /* !amd64 */
int
linux_sys_setresgid(struct lwp *l, const struct linux_sys_setresgid_args *uap, register_t *retval)
{
/* {
syscallarg(gid_t) rgid;
syscallarg(gid_t) egid;
syscallarg(gid_t) sgid;
} */
/*
* Note: These checks are a little different than the NetBSD
* setregid(2) call performs. This precisely follows the
* behavior of the Linux kernel.
*/
return do_setresgid(l, SCARG(uap,rgid), SCARG(uap, egid),
SCARG(uap, sgid),
ID_R_EQ_R | ID_R_EQ_E | ID_R_EQ_S |
ID_E_EQ_R | ID_E_EQ_E | ID_E_EQ_S |
ID_S_EQ_R | ID_S_EQ_E | ID_S_EQ_S );
}
int
linux_sys_getresgid(struct lwp *l, const struct linux_sys_getresgid_args *uap, register_t *retval)
{
/* {
syscallarg(gid_t *) rgid;
syscallarg(gid_t *) egid;
syscallarg(gid_t *) sgid;
} */
kauth_cred_t pc = l->l_cred;
int error;
gid_t gid;
/*
* Linux copies these values out to userspace like so:
*
* 1. Copy out rgid.
* 2. If that succeeds, copy out egid.
* 3. If both of those succeed, copy out sgid.
*/
gid = kauth_cred_getgid(pc);
if ((error = copyout(&gid, SCARG(uap, rgid), sizeof(gid_t))) != 0)
return (error);
gid = kauth_cred_getegid(pc);
if ((error = copyout(&gid, SCARG(uap, egid), sizeof(gid_t))) != 0)
return (error);
gid = kauth_cred_getsvgid(pc);
return (copyout(&gid, SCARG(uap, sgid), sizeof(gid_t)));
}
#ifndef __amd64__
/*
* I wonder why Linux has settimeofday() _and_ stime().. Still, we
* need to deal with it.
*/
int
linux_sys_stime(struct lwp *l, const struct linux_sys_stime_args *uap, register_t *retval)
{
/* {
syscallarg(linux_time_t) *t;
} */
struct timespec ats;
linux_time_t tt;
int error;
if ((error = copyin(&tt, SCARG(uap, t), sizeof tt)) != 0)
return error;
ats.tv_sec = tt;
ats.tv_nsec = 0;
if ((error = settime(l->l_proc, &ats)))
return (error);
return 0;
}
#endif /* !amd64 */
#if !defined(__m68k__) && !defined(__amd64__)
/*
* Convert NetBSD statvfs structure to Linux statfs64 structure.
* See comments in bsd_to_linux_statfs() for further background.
* We can safely pass correct bsize and frsize here, since Linux glibc
* statvfs() doesn't use statfs64().
*/
static void
bsd_to_linux_statfs64(const struct statvfs *bsp, struct linux_statfs64 *lsp)
{
int i, div;
for (i = 0; i < linux_fstypes_cnt; i++) {
if (strcmp(bsp->f_fstypename, linux_fstypes[i].bsd) == 0) {
lsp->l_ftype = linux_fstypes[i].linux;
break;
}
}
if (i == linux_fstypes_cnt) {
DPRINTF(("unhandled fstype in linux emulation: %s\n",
bsp->f_fstypename));
lsp->l_ftype = LINUX_DEFAULT_SUPER_MAGIC;
}
div = bsp->f_frsize ? (bsp->f_bsize / bsp->f_frsize) : 1;
if (div == 0)
div = 1;
lsp->l_fbsize = bsp->f_bsize;
lsp->l_ffrsize = bsp->f_frsize;
lsp->l_fblocks = bsp->f_blocks / div;
lsp->l_fbfree = bsp->f_bfree / div;
lsp->l_fbavail = bsp->f_bavail / div;
lsp->l_ffiles = bsp->f_files;
lsp->l_fffree = bsp->f_ffree / div;
/* Linux sets the fsid to 0..., we don't */
lsp->l_ffsid.val[0] = bsp->f_fsidx.__fsid_val[0];
lsp->l_ffsid.val[1] = bsp->f_fsidx.__fsid_val[1];
lsp->l_fnamelen = bsp->f_namemax;
(void)memset(lsp->l_fspare, 0, sizeof(lsp->l_fspare));
}
/*
* Implement the fs stat functions. Straightforward.
*/
int
linux_sys_statfs64(struct lwp *l, const struct linux_sys_statfs64_args *uap, register_t *retval)
{
/* {
syscallarg(const char *) path;
syscallarg(size_t) sz;
syscallarg(struct linux_statfs64 *) sp;
} */
struct statvfs *sb;
struct linux_statfs64 ltmp;
int error;
if (SCARG(uap, sz) != sizeof ltmp)
return (EINVAL);
sb = STATVFSBUF_GET();
error = do_sys_pstatvfs(l, SCARG(uap, path), ST_WAIT, sb);
if (error == 0) {
bsd_to_linux_statfs64(sb, <mp);
error = copyout(<mp, SCARG(uap, sp), sizeof ltmp);
}
STATVFSBUF_PUT(sb);
return error;
}
int
linux_sys_fstatfs64(struct lwp *l, const struct linux_sys_fstatfs64_args *uap, register_t *retval)
{
/* {
syscallarg(int) fd;
syscallarg(size_t) sz;
syscallarg(struct linux_statfs64 *) sp;
} */
struct statvfs *sb;
struct linux_statfs64 ltmp;
int error;
if (SCARG(uap, sz) != sizeof ltmp)
return (EINVAL);
sb = STATVFSBUF_GET();
error = do_sys_fstatvfs(l, SCARG(uap, fd), ST_WAIT, sb);
if (error == 0) {
bsd_to_linux_statfs64(sb, <mp);
error = copyout(<mp, SCARG(uap, sp), sizeof ltmp);
}
STATVFSBUF_PUT(sb);
return error;
}
#endif /* !__m68k__ && !__amd64__ */
#endif /* !COMPAT_LINUX32 */