/*
* sys_parisc32.c: Conversion between 32bit and 64bit native syscalls.
*
* Copyright (C) 2000-2001 Hewlett Packard Company
* Copyright (C) 2000 John Marvin
* Copyright (C) 2001 Matthew Wilcox
*
* These routines maintain argument size conversion between 32bit and 64bit
* environment. Based heavily on sys_ia32.c and sys_sparc32.c.
*/
#include <linux/config.h>
#include <linux/compat.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/file.h>
#include <linux/signal.h>
#include <linux/resource.h>
#include <linux/times.h>
#include <linux/utsname.h>
#include <linux/time.h>
#include <linux/timex.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/sem.h>
#include <linux/msg.h>
#include <linux/shm.h>
#include <linux/slab.h>
#include <linux/uio.h>
#include <linux/nfs_fs.h>
#include <linux/ncp_fs.h>
#include <linux/sunrpc/svc.h>
#include <linux/nfsd/nfsd.h>
#include <linux/nfsd/cache.h>
#include <linux/nfsd/xdr.h>
#include <linux/nfsd/syscall.h>
#include <linux/poll.h>
#include <linux/personality.h>
#include <linux/stat.h>
#include <linux/highmem.h>
#include <linux/highuid.h>
#include <linux/mman.h>
#include <linux/binfmts.h>
#include <linux/namei.h>
#include <linux/vfs.h>
#include <linux/ptrace.h>
#include <linux/swap.h>
#include <linux/syscalls.h>
#include <asm/types.h>
#include <asm/uaccess.h>
#include <asm/semaphore.h>
#include <asm/mmu_context.h>
#include "sys32.h"
#undef DEBUG
#ifdef DEBUG
#define DBG(x) printk x
#else
#define DBG(x)
#endif
/*
* count32() counts the number of arguments/envelopes. It is basically
* a copy of count() from fs/exec.c, except that it works
* with 32 bit argv and envp pointers.
*/
static int count32(u32 *argv, int max)
{
int i = 0;
if (argv != NULL) {
for (;;) {
u32 p;
int error;
error = get_user(p,argv);
if (error)
return error;
if (!p)
break;
argv++;
if(++i > max)
return -E2BIG;
}
}
return i;
}
/*
* copy_strings32() is basically a copy of copy_strings() from fs/exec.c
* except that it works with 32 bit argv and envp pointers.
*/
static int copy_strings32(int argc, u32 *argv, struct linux_binprm *bprm)
{
while (argc-- > 0) {
u32 str;
int len;
unsigned long pos;
if (get_user(str, argv + argc) ||
!str ||
!(len = strnlen_user((char *)compat_ptr(str), bprm->p)))
return -EFAULT;
if (bprm->p < len)
return -E2BIG;
bprm->p -= len;
pos = bprm->p;
while (len > 0) {
char *kaddr;
int i, new, err;
struct page *page;
int offset, bytes_to_copy;
offset = pos % PAGE_SIZE;
i = pos/PAGE_SIZE;
page = bprm->page[i];
new = 0;
if (!page) {
page = alloc_page(GFP_HIGHUSER);
bprm->page[i] = page;
if (!page)
return -ENOMEM;
new = 1;
}
kaddr = (char *)kmap(page);
if (new && offset)
memset(kaddr, 0, offset);
bytes_to_copy = PAGE_SIZE - offset;
if (bytes_to_copy > len) {
bytes_to_copy = len;
if (new)
memset(kaddr+offset+len, 0, PAGE_SIZE-offset-len);
}
err = copy_from_user(kaddr + offset, (char *)compat_ptr(str), bytes_to_copy);
flush_dcache_page(page);
kunmap(page);
if (err)
return -EFAULT;
pos += bytes_to_copy;
str += bytes_to_copy;
len -= bytes_to_copy;
}
}
return 0;
}
/*
* do_execve32() is mostly a copy of do_execve(), with the exception
* that it processes 32 bit argv and envp pointers.
*/
static inline int
do_execve32(char * filename, u32 * argv, u32 * envp, struct pt_regs * regs)
{
struct linux_binprm bprm;
struct file *file;
int retval;
int i;
file = open_exec(filename);
retval = PTR_ERR(file);
if (IS_ERR(file))
return retval;
bprm.p = PAGE_SIZE*MAX_ARG_PAGES-sizeof(void *);
memset(bprm.page, 0, MAX_ARG_PAGES*sizeof(bprm.page[0]));
DBG(("do_execve32(%s, %p, %p, %p)\n", filename, argv, envp, regs));
bprm.file = file;
bprm.filename = filename;
bprm.interp = filename;
bprm.sh_bang = 0;
bprm.loader = 0;
bprm.exec = 0;
bprm.mm = mm_alloc();
retval = -ENOMEM;
if (!bprm.mm)
goto out_file;
retval = init_new_context(current, bprm.mm);
if (retval < 0)
goto out_mm;
if ((bprm.argc = count32(argv, bprm.p / sizeof(u32))) < 0)
goto out_mm;
if ((bprm.envc = count32(envp, bprm.p / sizeof(u32))) < 0)
goto out_mm;
retval = prepare_binprm(&bprm);
if (retval < 0)
goto out;
retval = copy_strings_kernel(1, &bprm.filename, &bprm);
if (retval < 0)
goto out;
bprm.exec = bprm.p;
retval = copy_strings32(bprm.envc, envp, &bprm);
if (retval < 0)
goto out;
retval = copy_strings32(bprm.argc, argv, &bprm);
if (retval < 0)
goto out;
retval = search_binary_handler(&bprm,regs);
if (retval >= 0)
/* execve success */
return retval;
out:
/* Something went wrong, return the inode and free the argument pages*/
for (i = 0; i < MAX_ARG_PAGES; i++) {
struct page *page = bprm.page[i];
if (page)
__free_page(page);
}
out_mm:
mmdrop(bprm.mm);
out_file:
if (bprm.file) {
allow_write_access(bprm.file);
fput(bprm.file);
}
return retval;
}
/*
* sys32_execve() executes a new program.
*/
asmlinkage int sys32_execve(struct pt_regs *regs)
{
int error;
char *filename;
DBG(("sys32_execve(%p) r26 = 0x%lx\n", regs, regs->gr[26]));
filename = getname((char *) regs->gr[26]);
error = PTR_ERR(filename);
if (IS_ERR(filename))
goto out;
error = do_execve32(filename, (u32 *) regs->gr[25],
(u32 *) regs->gr[24], regs);
if (error == 0)
current->ptrace &= ~PT_DTRACE;
putname(filename);
out:
return error;
}
asmlinkage long sys32_unimplemented(int r26, int r25, int r24, int r23,
int r22, int r21, int r20)
{
printk(KERN_ERR "%s(%d): Unimplemented 32 on 64 syscall #%d!\n",
current->comm, current->pid, r20);
return -ENOSYS;
}
#ifdef CONFIG_SYSCTL
struct __sysctl_args32 {
u32 name;
int nlen;
u32 oldval;
u32 oldlenp;
u32 newval;
u32 newlen;
u32 __unused[4];
};
asmlinkage long sys32_sysctl(struct __sysctl_args32 *args)
{
struct __sysctl_args32 tmp;
int error;
unsigned int oldlen32;
size_t oldlen, *oldlenp = NULL;
unsigned long addr = (((long)&args->__unused[0]) + 7) & ~7;
extern int do_sysctl(int *name, int nlen, void *oldval, size_t *oldlenp,
void *newval, size_t newlen);
DBG(("sysctl32(%p)\n", args));
if (copy_from_user(&tmp, args, sizeof(tmp)))
return -EFAULT;
if (tmp.oldval && tmp.oldlenp) {
/* Duh, this is ugly and might not work if sysctl_args
is in read-only memory, but do_sysctl does indirectly
a lot of uaccess in both directions and we'd have to
basically copy the whole sysctl.c here, and
glibc's __sysctl uses rw memory for the structure
anyway. */
/* a possibly better hack than this, which will avoid the
* problem if the struct is read only, is to push the
* 'oldlen' value out to the user's stack instead. -PB
*/
if (get_user(oldlen32, (u32 *)(u64)tmp.oldlenp))
return -EFAULT;
oldlen = oldlen32;
if (put_user(oldlen, (size_t *)addr))
return -EFAULT;
oldlenp = (size_t *)addr;
}
lock_kernel();
error = do_sysctl((int *)(u64)tmp.name, tmp.nlen, (void *)(u64)tmp.oldval,
oldlenp, (void *)(u64)tmp.newval, tmp.newlen);
unlock_kernel();
if (oldlenp) {
if (!error) {
if (get_user(oldlen, (size_t *)addr)) {
error = -EFAULT;
} else {
oldlen32 = oldlen;
if (put_user(oldlen32, (u32 *)(u64)tmp.oldlenp))
error = -EFAULT;
}
}
if (copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused)))
error = -EFAULT;
}
return error;
}
#else /* CONFIG_SYSCTL */
asmlinkage long sys32_sysctl(struct __sysctl_args *args)
{
return -ENOSYS;
}
#endif /* CONFIG_SYSCTL */
asmlinkage long sys32_sched_rr_get_interval(pid_t pid,
struct compat_timespec *interval)
{
struct timespec t;
int ret;
KERNEL_SYSCALL(ret, sys_sched_rr_get_interval, pid, &t);
if (put_compat_timespec(&t, interval))
return -EFAULT;
return ret;
}
static int
put_compat_timeval(struct compat_timeval *u, struct timeval *t)
{
struct compat_timeval t32;
t32.tv_sec = t->tv_sec;
t32.tv_usec = t->tv_usec;
return copy_to_user(u, &t32, sizeof t32);
}
static inline long get_ts32(struct timespec *o, struct compat_timeval *i)
{
long usec;
if (__get_user(o->tv_sec, &i->tv_sec))
return -EFAULT;
if (__get_user(usec, &i->tv_usec))
return -EFAULT;
o->tv_nsec = usec * 1000;
return 0;
}
asmlinkage long sys32_time(compat_time_t *tloc)
{
time_t now = get_seconds();
compat_time_t now32 = now;
if (tloc)
if (put_user(now32, tloc))
now32 = -EFAULT;
return now32;
}
asmlinkage int
sys32_gettimeofday(struct compat_timeval *tv, struct timezone *tz)
{
extern void do_gettimeofday(struct timeval *tv);
if (tv) {
struct timeval ktv;
do_gettimeofday(&ktv);
if (put_compat_timeval(tv, &ktv))
return -EFAULT;
}
if (tz) {
extern struct timezone sys_tz;
if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
return -EFAULT;
}
return 0;
}
asmlinkage
int sys32_settimeofday(struct compat_timeval *tv, struct timezone *tz)
{
struct timespec kts;
struct timezone ktz;
if (tv) {
if (get_ts32(&kts, tv))
return -EFAULT;
}
if (tz) {
if (copy_from_user(&ktz, tz, sizeof(ktz)))
return -EFAULT;
}
return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
}
int cp_compat_stat(struct kstat *stat, struct compat_stat *statbuf)
{
int err;
if (stat->size > MAX_NON_LFS || !new_valid_dev(stat->dev) ||
!new_valid_dev(stat->rdev))
return -EOVERFLOW;
err = put_user(new_encode_dev(stat->dev), &statbuf->st_dev);
err |= put_user(stat->ino, &statbuf->st_ino);
err |= put_user(stat->mode, &statbuf->st_mode);
err |= put_user(stat->nlink, &statbuf->st_nlink);
err |= put_user(0, &statbuf->st_reserved1);
err |= put_user(0, &statbuf->st_reserved2);
err |= put_user(new_encode_dev(stat->rdev), &statbuf->st_rdev);
err |= put_user(stat->size, &statbuf->st_size);
err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
err |= put_user(stat->blksize, &statbuf->st_blksize);
err |= put_user(stat->blocks, &statbuf->st_blocks);
err |= put_user(0, &statbuf->__unused1);
err |= put_user(0, &statbuf->__unused2);
err |= put_user(0, &statbuf->__unused3);
err |= put_user(0, &statbuf->__unused4);
err |= put_user(0, &statbuf->__unused5);
err |= put_user(0, &statbuf->st_fstype); /* not avail */
err |= put_user(0, &statbuf->st_realdev); /* not avail */
err |= put_user(0, &statbuf->st_basemode); /* not avail */
err |= put_user(0, &statbuf->st_spareshort);
err |= put_user(stat->uid, &statbuf->st_uid);
err |= put_user(stat->gid, &statbuf->st_gid);
err |= put_user(0, &statbuf->st_spare4[0]);
err |= put_user(0, &statbuf->st_spare4[1]);
err |= put_user(0, &statbuf->st_spare4[2]);
return err;
}
struct linux32_dirent {
u32 d_ino;
compat_off_t d_off;
u16 d_reclen;
char d_name[1];
};
struct old_linux32_dirent {
u32 d_ino;
u32 d_offset;
u16 d_namlen;
char d_name[1];
};
struct getdents32_callback {
struct linux32_dirent * current_dir;
struct linux32_dirent * previous;
int count;
int error;
};
struct readdir32_callback {
struct old_linux32_dirent * dirent;
int count;
};
#define ROUND_UP(x,a) ((__typeof__(x))(((unsigned long)(x) + ((a) - 1)) & ~((a) - 1)))
#define NAME_OFFSET(de) ((int) ((de)->d_name - (char *) (de)))
static int
filldir32 (void *__buf, const char *name, int namlen, loff_t offset, ino_t ino,
unsigned int d_type)
{
struct linux32_dirent * dirent;
struct getdents32_callback * buf = (struct getdents32_callback *) __buf;
int reclen = ROUND_UP(NAME_OFFSET(dirent) + namlen + 1, 4);
buf->error = -EINVAL; /* only used if we fail.. */
if (reclen > buf->count)
return -EINVAL;
dirent = buf->previous;
if (dirent)
put_user(offset, &dirent->d_off);
dirent = buf->current_dir;
buf->previous = dirent;
put_user(ino, &dirent->d_ino);
put_user(reclen, &dirent->d_reclen);
copy_to_user(dirent->d_name, name, namlen);
put_user(0, dirent->d_name + namlen);
((char *) dirent) += reclen;
buf->current_dir = dirent;
buf->count -= reclen;
return 0;
}
asmlinkage long
sys32_getdents (unsigned int fd, void * dirent, unsigned int count)
{
struct file * file;
struct linux32_dirent * lastdirent;
struct getdents32_callback buf;
int error;
error = -EBADF;
file = fget(fd);
if (!file)
goto out;
buf.current_dir = (struct linux32_dirent *) dirent;
buf.previous = NULL;
buf.count = count;
buf.error = 0;
error = vfs_readdir(file, filldir32, &buf);
if (error < 0)
goto out_putf;
error = buf.error;
lastdirent = buf.previous;
if (lastdirent) {
put_user(file->f_pos, &lastdirent->d_off);
error = count - buf.count;
}
out_putf:
fput(file);
out:
return error;
}
static int
fillonedir32 (void * __buf, const char * name, int namlen, loff_t offset, ino_t ino,
unsigned int d_type)
{
struct readdir32_callback * buf = (struct readdir32_callback *) __buf;
struct old_linux32_dirent * dirent;
if (buf->count)
return -EINVAL;
buf->count++;
dirent = buf->dirent;
put_user(ino, &dirent->d_ino);
put_user(offset, &dirent->d_offset);
put_user(namlen, &dirent->d_namlen);
copy_to_user(dirent->d_name, name, namlen);
put_user(0, dirent->d_name + namlen);
return 0;
}
asmlinkage long
sys32_readdir (unsigned int fd, void * dirent, unsigned int count)
{
int error;
struct file * file;
struct readdir32_callback buf;
error = -EBADF;
file = fget(fd);
if (!file)
goto out;
buf.count = 0;
buf.dirent = dirent;
error = vfs_readdir(file, fillonedir32, &buf);
if (error >= 0)
error = buf.count;
fput(file);
out:
return error;
}
static int copy_mount_stuff_to_kernel(const void *user, unsigned long *kernel)
{
int i;
unsigned long page;
struct vm_area_struct *vma;
*kernel = 0;
if(!user)
return 0;
vma = find_vma(current->mm, (unsigned long)user);
if(!vma || (unsigned long)user < vma->vm_start)
return -EFAULT;
if(!(vma->vm_flags & VM_READ))
return -EFAULT;
i = vma->vm_end - (unsigned long) user;
if(PAGE_SIZE <= (unsigned long) i)
i = PAGE_SIZE - 1;
if(!(page = __get_free_page(GFP_KERNEL)))
return -ENOMEM;
if(copy_from_user((void *) page, user, i)) {
free_page(page);
return -EFAULT;
}
*kernel = page;
return 0;
}
#define SMBFS_NAME "smbfs"
#define NCPFS_NAME "ncpfs"
asmlinkage int sys32_mount(char *dev_name, char *dir_name, char *type, unsigned long new_flags, u32 data)
{
unsigned long type_page = 0;
unsigned long data_page = 0;
unsigned long dev_page = 0;
unsigned long dir_page = 0;
int err, is_smb, is_ncp;
is_smb = is_ncp = 0;
err = copy_mount_stuff_to_kernel((const void *)type, &type_page);
if (err)
goto out;
if (!type_page) {
err = -EINVAL;
goto out;
}
is_smb = !strcmp((char *)type_page, SMBFS_NAME);
is_ncp = !strcmp((char *)type_page, NCPFS_NAME);
err = copy_mount_stuff_to_kernel((const void *)(unsigned long)data, &data_page);
if (err)
goto type_out;
err = copy_mount_stuff_to_kernel(dev_name, &dev_page);
if (err)
goto data_out;
err = copy_mount_stuff_to_kernel(dir_name, &dir_page);
if (err)
goto dev_out;
if (!is_smb && !is_ncp) {
lock_kernel();
err = do_mount((char*)dev_page, (char*)dir_page,
(char*)type_page, new_flags, (char*)data_page);
unlock_kernel();
} else {
if (is_ncp)
panic("NCP mounts not yet supported 32/64 parisc");
/* do_ncp_super_data_conv((void *)data_page); */
else {
panic("SMB mounts not yet supported 32/64 parisc");
/* do_smb_super_data_conv((void *)data_page); */
}
lock_kernel();
err = do_mount((char*)dev_page, (char*)dir_page,
(char*)type_page, new_flags, (char*)data_page);
unlock_kernel();
}
free_page(dir_page);
dev_out:
free_page(dev_page);
data_out:
free_page(data_page);
type_out:
free_page(type_page);
out:
return err;
}
/* readv/writev stolen from mips64 */
typedef ssize_t (*IO_fn_t)(struct file *, char *, size_t, loff_t *);
static long
do_readv_writev32(int type, struct file *file, const struct compat_iovec *vector,
u32 count)
{
unsigned long tot_len;
struct iovec iovstack[UIO_FASTIOV];
struct iovec *iov=iovstack, *ivp;
struct inode *inode;
long retval, i;
IO_fn_t fn;
/* First get the "struct iovec" from user memory and
* verify all the pointers
*/
if (!count)
return 0;
if(verify_area(VERIFY_READ, vector, sizeof(struct compat_iovec)*count))
return -EFAULT;
if (count > UIO_MAXIOV)
return -EINVAL;
if (count > UIO_FASTIOV) {
iov = kmalloc(count*sizeof(struct iovec), GFP_KERNEL);
if (!iov)
return -ENOMEM;
}
tot_len = 0;
i = count;
ivp = iov;
while (i > 0) {
u32 len;
u32 buf;
__get_user(len, &vector->iov_len);
__get_user(buf, &vector->iov_base);
tot_len += len;
ivp->iov_base = compat_ptr(buf);
ivp->iov_len = (compat_size_t) len;
vector++;
ivp++;
i--;
}
inode = file->f_dentry->d_inode;
/* VERIFY_WRITE actually means a read, as we write to user space */
retval = locks_verify_area((type == VERIFY_WRITE
? FLOCK_VERIFY_READ : FLOCK_VERIFY_WRITE),
inode, file, file->f_pos, tot_len);
if (retval) {
if (iov != iovstack)
kfree(iov);
return retval;
}
/* Then do the actual IO. Note that sockets need to be handled
* specially as they have atomicity guarantees and can handle
* iovec's natively
*/
if (inode->i_sock) {
int err;
err = sock_readv_writev(type, inode, file, iov, count, tot_len);
if (iov != iovstack)
kfree(iov);
return err;
}
if (!file->f_op) {
if (iov != iovstack)
kfree(iov);
return -EINVAL;
}
/* VERIFY_WRITE actually means a read, as we write to user space */
fn = file->f_op->read;
if (type == VERIFY_READ)
fn = (IO_fn_t) file->f_op->write;
ivp = iov;
while (count > 0) {
void * base;
int len, nr;
base = ivp->iov_base;
len = ivp->iov_len;
ivp++;
count--;
nr = fn(file, base, len, &file->f_pos);
if (nr < 0) {
if (retval)
break;
retval = nr;
break;
}
retval += nr;
if (nr != len)
break;
}
if (iov != iovstack)
kfree(iov);
return retval;
}
asmlinkage long
sys32_readv(int fd, struct compat_iovec *vector, u32 count)
{
struct file *file;
ssize_t ret;
ret = -EBADF;
file = fget(fd);
if (!file)
goto bad_file;
if (file->f_op && (file->f_mode & FMODE_READ) &&
(file->f_op->readv || file->f_op->read))
ret = do_readv_writev32(VERIFY_WRITE, file, vector, count);
fput(file);
bad_file:
return ret;
}
asmlinkage long
sys32_writev(int fd, struct compat_iovec *vector, u32 count)
{
struct file *file;
ssize_t ret;
ret = -EBADF;
file = fget(fd);
if(!file)
goto bad_file;
if (file->f_op && (file->f_mode & FMODE_WRITE) &&
(file->f_op->writev || file->f_op->write))
ret = do_readv_writev32(VERIFY_READ, file, vector, count);
fput(file);
bad_file:
return ret;
}
/*** copied from mips64 ***/
/*
* Ooo, nasty. We need here to frob 32-bit unsigned longs to
* 64-bit unsigned longs.
*/
static inline int
get_fd_set32(unsigned long n, u32 *ufdset, unsigned long *fdset)
{
n = (n + 8*sizeof(u32) - 1) / (8*sizeof(u32));
if (ufdset) {
unsigned long odd;
if (verify_area(VERIFY_WRITE, ufdset, n*sizeof(u32)))
return -EFAULT;
odd = n & 1UL;
n &= ~1UL;
while (n) {
unsigned long h, l;
__get_user(l, ufdset);
__get_user(h, ufdset+1);
ufdset += 2;
*fdset++ = h << 32 | l;
n -= 2;
}
if (odd)
__get_user(*fdset, ufdset);
} else {
/* Tricky, must clear full unsigned long in the
* kernel fdset at the end, this makes sure that
* actually happens.
*/
memset(fdset, 0, ((n + 1) & ~1)*sizeof(u32));
}
return 0;
}
static inline void
set_fd_set32(unsigned long n, u32 *ufdset, unsigned long *fdset)
{
unsigned long odd;
n = (n + 8*sizeof(u32) - 1) / (8*sizeof(u32));
if (!ufdset)
return;
odd = n & 1UL;
n &= ~1UL;
while (n) {
unsigned long h, l;
l = *fdset++;
h = l >> 32;
__put_user(l, ufdset);
__put_user(h, ufdset+1);
ufdset += 2;
n -= 2;
}
if (odd)
__put_user(*fdset, ufdset);
}
/*** This is a virtual copy of sys_select from fs/select.c and probably
*** should be compared to it from time to time
***/
static inline void *select_bits_alloc(int size)
{
return kmalloc(6 * size, GFP_KERNEL);
}
static inline void select_bits_free(void *bits, int size)
{
kfree(bits);
}
/*
* We can actually return ERESTARTSYS instead of EINTR, but I'd
* like to be certain this leads to no problems. So I return
* EINTR just for safety.
*
* Update: ERESTARTSYS breaks at least the xview clock binary, so
* I'm trying ERESTARTNOHAND which restart only when you want to.
*/
#define MAX_SELECT_SECONDS \
((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
#define DIVIDE_ROUND_UP(x,y) (((x)+(y)-1)/(y))
asmlinkage long
sys32_select(int n, u32 *inp, u32 *outp, u32 *exp, struct compat_timeval *tvp)
{
fd_set_bits fds;
char *bits;
long timeout;
int ret, size, err;
timeout = MAX_SCHEDULE_TIMEOUT;
if (tvp) {
struct compat_timeval tv32;
time_t sec, usec;
if ((ret = copy_from_user(&tv32, tvp, sizeof tv32)))
goto out_nofds;
sec = tv32.tv_sec;
usec = tv32.tv_usec;
ret = -EINVAL;
if (sec < 0 || usec < 0)
goto out_nofds;
if ((unsigned long) sec < MAX_SELECT_SECONDS) {
timeout = DIVIDE_ROUND_UP(usec, 1000000/HZ);
timeout += sec * (unsigned long) HZ;
}
}
ret = -EINVAL;
if (n < 0)
goto out_nofds;
if (n > current->files->max_fdset)
n = current->files->max_fdset;
/*
* We need 6 bitmaps (in/out/ex for both incoming and outgoing),
* since we used fdset we need to allocate memory in units of
* long-words.
*/
ret = -ENOMEM;
size = FDS_BYTES(n);
bits = select_bits_alloc(size);
if (!bits)
goto out_nofds;
fds.in = (unsigned long *) bits;
fds.out = (unsigned long *) (bits + size);
fds.ex = (unsigned long *) (bits + 2*size);
fds.res_in = (unsigned long *) (bits + 3*size);
fds.res_out = (unsigned long *) (bits + 4*size);
fds.res_ex = (unsigned long *) (bits + 5*size);
if ((ret = get_fd_set32(n, inp, fds.in)) ||
(ret = get_fd_set32(n, outp, fds.out)) ||
(ret = get_fd_set32(n, exp, fds.ex)))
goto out;
zero_fd_set(n, fds.res_in);
zero_fd_set(n, fds.res_out);
zero_fd_set(n, fds.res_ex);
ret = do_select(n, &fds, &timeout);
if (tvp && !(current->personality & STICKY_TIMEOUTS)) {
time_t sec = 0, usec = 0;
if (timeout) {
sec = timeout / HZ;
usec = timeout % HZ;
usec *= (1000000/HZ);
}
err = put_user(sec, &tvp->tv_sec);
err |= __put_user(usec, &tvp->tv_usec);
if (err)
ret = -EFAULT;
}
if (ret < 0)
goto out;
if (!ret) {
ret = -ERESTARTNOHAND;
if (signal_pending(current))
goto out;
ret = 0;
}
set_fd_set32(n, inp, fds.res_in);
set_fd_set32(n, outp, fds.res_out);
set_fd_set32(n, exp, fds.res_ex);
out:
select_bits_free(bits, size);
out_nofds:
return ret;
}
struct msgbuf32 {
int mtype;
char mtext[1];
};
asmlinkage long sys32_msgsnd(int msqid,
struct msgbuf32 *umsgp32,
size_t msgsz, int msgflg)
{
struct msgbuf *mb;
struct msgbuf32 mb32;
int err;
if ((mb = kmalloc(msgsz + sizeof *mb + 4, GFP_KERNEL)) == NULL)
return -ENOMEM;
err = get_user(mb32.mtype, &umsgp32->mtype);
mb->mtype = mb32.mtype;
err |= copy_from_user(mb->mtext, &umsgp32->mtext, msgsz);
if (err)
err = -EFAULT;
else
KERNEL_SYSCALL(err, sys_msgsnd, msqid, mb, msgsz, msgflg);
kfree(mb);
return err;
}
asmlinkage long sys32_msgrcv(int msqid,
struct msgbuf32 *umsgp32,
size_t msgsz, long msgtyp, int msgflg)
{
struct msgbuf *mb;
struct msgbuf32 mb32;
int err, len;
if ((mb = kmalloc(msgsz + sizeof *mb + 4, GFP_KERNEL)) == NULL)
return -ENOMEM;
KERNEL_SYSCALL(err, sys_msgrcv, msqid, mb, msgsz, msgtyp, msgflg);
if (err >= 0) {
len = err;
mb32.mtype = mb->mtype;
err = put_user(mb32.mtype, &umsgp32->mtype);
err |= copy_to_user(&umsgp32->mtext, mb->mtext, len);
if (err)
err = -EFAULT;
else
err = len;
}
kfree(mb);
return err;
}
asmlinkage int sys32_sendfile(int out_fd, int in_fd, compat_off_t *offset, s32 count)
{
mm_segment_t old_fs = get_fs();
int ret;
off_t of;
if (offset && get_user(of, offset))
return -EFAULT;
set_fs(KERNEL_DS);
ret = sys_sendfile(out_fd, in_fd, offset ? &of : NULL, count);
set_fs(old_fs);
if (offset && put_user(of, offset))
return -EFAULT;
return ret;
}
/* EXPORT/UNEXPORT */
struct nfsctl_export32 {
char ex_client[NFSCLNT_IDMAX+1];
char ex_path[NFS_MAXPATHLEN+1];
__kernel_old_dev_t ex_dev;
compat_ino_t ex_ino;
int ex_flags;
__kernel_uid_t ex_anon_uid;
__kernel_gid_t ex_anon_gid;
};
struct nfsctl_arg32 {
int ca_version; /* safeguard */
/* wide kernel places this union on 8-byte boundary, narrow on 4 */
union {
struct nfsctl_svc u_svc;
struct nfsctl_client u_client;
struct nfsctl_export32 u_export;
struct nfsctl_fdparm u_getfd;
struct nfsctl_fsparm u_getfs;
} u;
};
asmlinkage int sys32_nfsservctl(int cmd, void *argp, void *resp)
{
int ret, tmp;
struct nfsctl_arg32 n32;
struct nfsctl_arg n;
ret = copy_from_user(&n, argp, sizeof n.ca_version);
if (ret != 0)
return ret;
/* adjust argp to point at the union inside the user's n32 struct */
tmp = (unsigned long)&n32.u - (unsigned long)&n32;
argp = (void *)((unsigned long)argp + tmp);
switch(cmd) {
case NFSCTL_SVC:
ret = copy_from_user(&n.u, argp, sizeof n.u.u_svc);
break;
case NFSCTL_ADDCLIENT:
case NFSCTL_DELCLIENT:
ret = copy_from_user(&n.u, argp, sizeof n.u.u_client);
break;
case NFSCTL_GETFD:
ret = copy_from_user(&n.u, argp, sizeof n.u.u_getfd);
break;
case NFSCTL_GETFS:
ret = copy_from_user(&n.u, argp, sizeof n.u.u_getfs);
break;
case NFSCTL_UNEXPORT: /* nfsctl_export */
case NFSCTL_EXPORT: /* nfsctl_export */
ret = copy_from_user(&n32.u, argp, sizeof n32.u.u_export);
#undef CP
#define CP(x) n.u.u_export.ex_##x = n32.u.u_export.ex_##x
memcpy(n.u.u_export.ex_client, n32.u.u_export.ex_client, sizeof n32.u.u_export.ex_client);
memcpy(n.u.u_export.ex_path, n32.u.u_export.ex_path, sizeof n32.u.u_export.ex_path);
CP(dev);
CP(ino);
CP(flags);
CP(anon_uid);
CP(anon_gid);
break;
default:
/* lockd probes for some other values (0x10000);
* so don't BUG() */
ret = -EINVAL;
break;
}
if (ret == 0) {
unsigned char rbuf[NFS_FHSIZE + sizeof (struct knfsd_fh)];
KERNEL_SYSCALL(ret, sys_nfsservctl, cmd, &n, &rbuf);
if (cmd == NFSCTL_GETFD) {
ret = copy_to_user(resp, rbuf, NFS_FHSIZE);
} else if (cmd == NFSCTL_GETFS) {
ret = copy_to_user(resp, rbuf, sizeof (struct knfsd_fh));
}
}
return ret;
}
typedef long __kernel_loff_t32; /* move this to asm/posix_types.h? */
asmlinkage int sys32_sendfile64(int out_fd, int in_fd, __kernel_loff_t32 *offset, s32 count)
{
mm_segment_t old_fs = get_fs();
int ret;
loff_t lof;
if (offset && get_user(lof, offset))
return -EFAULT;
set_fs(KERNEL_DS);
ret = sys_sendfile64(out_fd, in_fd, offset ? &lof : NULL, count);
set_fs(old_fs);
if (offset && put_user(lof, offset))
return -EFAULT;
return ret;
}
struct timex32 {
unsigned int modes; /* mode selector */
int offset; /* time offset (usec) */
int freq; /* frequency offset (scaled ppm) */
int maxerror; /* maximum error (usec) */
int esterror; /* estimated error (usec) */
int status; /* clock command/status */
int constant; /* pll time constant */
int precision; /* clock precision (usec) (read only) */
int tolerance; /* clock frequency tolerance (ppm)
* (read only)
*/
struct compat_timeval time; /* (read only) */
int tick; /* (modified) usecs between clock ticks */
int ppsfreq; /* pps frequency (scaled ppm) (ro) */
int jitter; /* pps jitter (us) (ro) */
int shift; /* interval duration (s) (shift) (ro) */
int stabil; /* pps stability (scaled ppm) (ro) */
int jitcnt; /* jitter limit exceeded (ro) */
int calcnt; /* calibration intervals (ro) */
int errcnt; /* calibration errors (ro) */
int stbcnt; /* stability limit exceeded (ro) */
int :32; int :32; int :32; int :32;
int :32; int :32; int :32; int :32;
int :32; int :32; int :32; int :32;
};
asmlinkage long sys32_adjtimex(struct timex32 *txc_p32)
{
struct timex txc;
struct timex32 t32;
int ret;
extern int do_adjtimex(struct timex *txc);
if(copy_from_user(&t32, txc_p32, sizeof(struct timex32)))
return -EFAULT;
#undef CP
#define CP(x) txc.x = t32.x
CP(modes); CP(offset); CP(freq); CP(maxerror); CP(esterror);
CP(status); CP(constant); CP(precision); CP(tolerance);
CP(time.tv_sec); CP(time.tv_usec); CP(tick); CP(ppsfreq); CP(jitter);
CP(shift); CP(stabil); CP(jitcnt); CP(calcnt); CP(errcnt);
CP(stbcnt);
ret = do_adjtimex(&txc);
#undef CP
#define CP(x) t32.x = txc.x
CP(modes); CP(offset); CP(freq); CP(maxerror); CP(esterror);
CP(status); CP(constant); CP(precision); CP(tolerance);
CP(time.tv_sec); CP(time.tv_usec); CP(tick); CP(ppsfreq); CP(jitter);
CP(shift); CP(stabil); CP(jitcnt); CP(calcnt); CP(errcnt);
CP(stbcnt);
return copy_to_user(txc_p32, &t32, sizeof(struct timex32)) ? -EFAULT : ret;
}
struct sysinfo32 {
s32 uptime;
u32 loads[3];
u32 totalram;
u32 freeram;
u32 sharedram;
u32 bufferram;
u32 totalswap;
u32 freeswap;
unsigned short procs;
u32 totalhigh;
u32 freehigh;
u32 mem_unit;
char _f[12];
};
/* We used to call sys_sysinfo and translate the result. But sys_sysinfo
* undoes the good work done elsewhere, and rather than undoing the
* damage, I decided to just duplicate the code from sys_sysinfo here.
*/
asmlinkage int sys32_sysinfo(struct sysinfo32 *info)
{
struct sysinfo val;
int err;
unsigned long seq;
/* We don't need a memset here because we copy the
* struct to userspace once element at a time.
*/
do {
seq = read_seqbegin(&xtime_lock);
val.uptime = jiffies / HZ;
val.loads[0] = avenrun[0] << (SI_LOAD_SHIFT - FSHIFT);
val.loads[1] = avenrun[1] << (SI_LOAD_SHIFT - FSHIFT);
val.loads[2] = avenrun[2] << (SI_LOAD_SHIFT - FSHIFT);
val.procs = nr_threads;
} while (read_seqretry(&xtime_lock, seq));
si_meminfo(&val);
si_swapinfo(&val);
err = put_user (val.uptime, &info->uptime);
err |= __put_user (val.loads[0], &info->loads[0]);
err |= __put_user (val.loads[1], &info->loads[1]);
err |= __put_user (val.loads[2], &info->loads[2]);
err |= __put_user (val.totalram, &info->totalram);
err |= __put_user (val.freeram, &info->freeram);
err |= __put_user (val.sharedram, &info->sharedram);
err |= __put_user (val.bufferram, &info->bufferram);
err |= __put_user (val.totalswap, &info->totalswap);
err |= __put_user (val.freeswap, &info->freeswap);
err |= __put_user (val.procs, &info->procs);
err |= __put_user (val.totalhigh, &info->totalhigh);
err |= __put_user (val.freehigh, &info->freehigh);
err |= __put_user (val.mem_unit, &info->mem_unit);
return err ? -EFAULT : 0;
}
/* lseek() needs a wrapper because 'offset' can be negative, but the top
* half of the argument has been zeroed by syscall.S.
*/
asmlinkage int sys32_lseek(unsigned int fd, int offset, unsigned int origin)
{
return sys_lseek(fd, offset, origin);
}
asmlinkage long sys32_semctl(int semid, int semnum, int cmd, union semun arg)
{
union semun u;
if (cmd == SETVAL) {
/* Ugh. arg is a union of int,ptr,ptr,ptr, so is 8 bytes.
* The int should be in the first 4, but our argument
* frobbing has left it in the last 4.
*/
u.val = *((int *)&arg + 1);
return sys_semctl (semid, semnum, cmd, u);
}
return sys_semctl (semid, semnum, cmd, arg);
}
long sys32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char *buf,
size_t len)
{
return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low,
buf, len);
}
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