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/*
* Conversion between 32-bit and 64-bit native system calls.
*
* Copyright (C) 2000 Silicon Graphics, Inc.
* Written by Ulf Carlsson (ulfc@engr.sgi.com)
* sys32_execve from ia64/ia32 code, Feb 2000, Kanoj Sarcar (kanoj@sgi.com)
*/
#include <linux/mm.h>
#include <linux/errno.h>
#include <linux/file.h>
#include <linux/smp_lock.h>
#include <linux/highuid.h>
#include <linux/dirent.h>
#include <linux/resource.h>
#include <linux/highmem.h>
#include <linux/time.h>
#include <linux/poll.h>
#include <linux/slab.h>
#include <linux/skbuff.h>
#include <linux/filter.h>
#include <linux/shm.h>
#include <linux/sem.h>
#include <linux/msg.h>
#include <linux/sysctl.h>
#include <linux/utime.h>
#include <linux/utsname.h>
#include <linux/personality.h>
#include <linux/timex.h>
#include <linux/dnotify.h>
#include <net/sock.h>
#include <asm/uaccess.h>
#include <asm/mman.h>
#include <asm/ipc.h>
#define A(__x) ((unsigned long)(__x))
/*
* Revalidate the inode. This is required for proper NFS attribute caching.
*/
static __inline__ int
do_revalidate(struct dentry *dentry)
{
struct inode * inode = dentry->d_inode;
if (inode->i_op && inode->i_op->revalidate)
return inode->i_op->revalidate(dentry);
return 0;
}
static int cp_new_stat32(struct inode * inode, struct stat32 * statbuf)
{
struct stat32 tmp;
unsigned int blocks, indirect;
memset(&tmp, 0, sizeof(tmp));
tmp.st_dev = kdev_t_to_nr(inode->i_dev);
tmp.st_ino = inode->i_ino;
tmp.st_mode = inode->i_mode;
tmp.st_nlink = inode->i_nlink;
SET_STAT_UID(tmp, inode->i_uid);
SET_STAT_GID(tmp, inode->i_gid);
tmp.st_rdev = kdev_t_to_nr(inode->i_rdev);
tmp.st_size = inode->i_size;
tmp.st_atime = inode->i_atime;
tmp.st_mtime = inode->i_mtime;
tmp.st_ctime = inode->i_ctime;
/*
* st_blocks and st_blksize are approximated with a simple algorithm if
* they aren't supported directly by the filesystem. The minix and msdos
* filesystems don't keep track of blocks, so they would either have to
* be counted explicitly (by delving into the file itself), or by using
* this simple algorithm to get a reasonable (although not 100%
* accurate) value.
*/
/*
* Use minix fs values for the number of direct and indirect blocks.
* The count is now exact for the minix fs except that it counts zero
* blocks. Everything is in units of BLOCK_SIZE until the assignment
* to tmp.st_blksize.
*/
#define D_B 7
#define I_B (BLOCK_SIZE / sizeof(unsigned short))
if (!inode->i_blksize) {
blocks = (tmp.st_size + BLOCK_SIZE - 1) / BLOCK_SIZE;
if (blocks > D_B) {
indirect = (blocks - D_B + I_B - 1) / I_B;
blocks += indirect;
if (indirect > 1) {
indirect = (indirect - 1 + I_B - 1) / I_B;
blocks += indirect;
if (indirect > 1)
blocks++;
}
}
tmp.st_blocks = (BLOCK_SIZE / 512) * blocks;
tmp.st_blksize = BLOCK_SIZE;
} else {
tmp.st_blocks = inode->i_blocks;
tmp.st_blksize = inode->i_blksize;
}
return copy_to_user(statbuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
}
asmlinkage int sys32_newstat(char * filename, struct stat32 *statbuf)
{
struct nameidata nd;
int error;
error = user_path_walk(filename, &nd);
if (!error) {
error = do_revalidate(nd.dentry);
if (!error)
error = cp_new_stat32(nd.dentry->d_inode, statbuf);
path_release(&nd);
}
return error;
}
asmlinkage int sys32_newlstat(char * filename, struct stat32 *statbuf)
{
struct nameidata nd;
int error;
error = user_path_walk_link(filename, &nd);
if (!error) {
error = do_revalidate(nd.dentry);
if (!error)
error = cp_new_stat32(nd.dentry->d_inode, statbuf);
path_release(&nd);
}
return error;
}
asmlinkage long sys32_newfstat(unsigned int fd, struct stat32 * statbuf)
{
struct file * f;
int err = -EBADF;
f = fget(fd);
if (f) {
struct dentry * dentry = f->f_dentry;
err = do_revalidate(dentry);
if (!err)
err = cp_new_stat32(dentry->d_inode, statbuf);
fput(f);
}
return err;
}
asmlinkage int sys_mmap2(void) {return 0;}
asmlinkage long sys_truncate(const char * path, unsigned long length);
asmlinkage int sys_truncate64(const char *path, unsigned int high,
unsigned int low)
{
if ((int)high < 0)
return -EINVAL;
return sys_truncate(path, ((long) high << 32) | low);
}
asmlinkage long sys_ftruncate(unsigned int fd, unsigned long length);
asmlinkage int sys_ftruncate64(unsigned int fd, unsigned int high,
unsigned int low)
{
if ((int)high < 0)
return -EINVAL;
return sys_ftruncate(fd, ((long) high << 32) | low);
}
extern asmlinkage int sys_utime(char * filename, struct utimbuf * times);
struct utimbuf32 {
__kernel_time_t32 actime, modtime;
};
asmlinkage int sys32_utime(char * filename, struct utimbuf32 *times)
{
struct utimbuf t;
mm_segment_t old_fs;
int ret;
char *filenam;
if (!times)
return sys_utime(filename, NULL);
if (get_user (t.actime, ×->actime) ||
__get_user (t.modtime, ×->modtime))
return -EFAULT;
filenam = getname (filename);
ret = PTR_ERR(filenam);
if (!IS_ERR(filenam)) {
old_fs = get_fs();
set_fs (KERNEL_DS);
ret = sys_utime(filenam, &t);
set_fs (old_fs);
putname (filenam);
}
return ret;
}
#if 0
/*
* count32() counts the number of arguments/envelopes
*/
static int count32(u32 * argv, int max)
{
int i = 0;
if (argv != NULL) {
for (;;) {
u32 p;
/* egcs is stupid */
if (!access_ok(VERIFY_READ, argv, sizeof (u32)))
return -EFAULT;
__get_user(p,argv);
if (!p)
break;
argv++;
if(++i > max)
return -E2BIG;
}
}
return i;
}
/*
* 'copy_strings32()' copies argument/envelope strings from user
* memory to free pages in kernel mem. These are in a format ready
* to be put directly into the top of new user memory.
*/
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 *)A(str), bprm->p)))
return -EFAULT;
if (bprm->p < len)
return -E2BIG;
bprm->p -= len;
/* XXX: add architecture specific overflow check here. */
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 = 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 *)A(str),
bytes_to_copy);
flush_page_to_ram(page);
kunmap(page);
if (err)
return -EFAULT;
pos += bytes_to_copy;
str += bytes_to_copy;
len -= bytes_to_copy;
}
}
return 0;
}
/*
* sys_execve32() executes a new program.
*/
int do_execve32(char * filename, u32 * argv, u32 * envp, struct pt_regs * regs)
{
struct linux_binprm bprm;
struct dentry * dentry;
int retval;
int i;
bprm.p = PAGE_SIZE*MAX_ARG_PAGES-sizeof(void *);
memset(bprm.page, 0, MAX_ARG_PAGES*sizeof(bprm.page[0]));
dentry = open_namei(filename, 0, 0);
retval = PTR_ERR(dentry);
if (IS_ERR(dentry))
return retval;
bprm.dentry = dentry;
bprm.filename = filename;
bprm.sh_bang = 0;
bprm.loader = 0;
bprm.exec = 0;
if ((bprm.argc = count32(argv, bprm.p / sizeof(u32))) < 0) {
dput(dentry);
return bprm.argc;
}
if ((bprm.envc = count32(envp, bprm.p / sizeof(u32))) < 0) {
dput(dentry);
return bprm.envc;
}
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*/
if (bprm.dentry)
dput(bprm.dentry);
/* Assumes that free_page() can take a NULL argument. */
/* I hope this is ok for all architectures */
for (i = 0 ; i < MAX_ARG_PAGES ; i++)
if (bprm.page[i])
__free_page(bprm.page[i]);
return retval;
}
/*
* sys_execve() executes a new program.
*/
asmlinkage int sys32_execve(abi64_no_regargs, struct pt_regs regs)
{
int error;
char * filename;
filename = getname((char *) (long)regs.regs[4]);
printk("Executing: %s\n", filename);
error = PTR_ERR(filename);
if (IS_ERR(filename))
goto out;
error = do_execve32(filename, (u32 *) (long)regs.regs[5],
(u32 *) (long)regs.regs[6], ®s);
putname(filename);
out:
return error;
}
#else
static int
nargs(unsigned int arg, char **ap)
{
char *ptr;
int n, ret;
n = 0;
do {
/* egcs is stupid */
if (!access_ok(VERIFY_READ, arg, sizeof (unsigned int)))
return -EFAULT;
if (IS_ERR(ret = __get_user((long)ptr,(int *)A(arg))))
return ret;
if (ap) /* no access_ok needed, we allocated */
if (IS_ERR(ret = __put_user(ptr, ap++)))
return ret;
arg += sizeof(unsigned int);
n++;
} while (ptr);
return(n - 1);
}
asmlinkage int
sys32_execve(abi64_no_regargs, struct pt_regs regs)
{
extern asmlinkage int sys_execve(abi64_no_regargs, struct pt_regs regs);
extern asmlinkage long sys_munmap(unsigned long addr, size_t len);
unsigned int argv = (unsigned int)regs.regs[5];
unsigned int envp = (unsigned int)regs.regs[6];
char **av, **ae;
int na, ne, r, len;
char * filename;
na = nargs(argv, NULL);
if (IS_ERR(na))
return(na);
ne = nargs(envp, NULL);
if (IS_ERR(ne))
return(ne);
len = (na + ne + 2) * sizeof(*av);
/*
* kmalloc won't work because the `sys_exec' code will attempt
* to do a `get_user' on the arg list and `get_user' will fail
* on a kernel address (simplifies `get_user'). Instead we
* do an mmap to get a user address. Note that since a successful
* `execve' frees all current memory we only have to do an
* `munmap' if the `execve' failes.
*/
down_write(¤t->mm->mmap_sem);
av = (char **) do_mmap_pgoff(0, 0, len, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, 0);
up_write(¤t->mm->mmap_sem);
if (IS_ERR(av))
return (long) av;
ae = av + na + 1;
if (IS_ERR(r = __put_user(0, (av + na))))
goto out;
if (IS_ERR(r = __put_user(0, (ae + ne))))
goto out;
if (IS_ERR(r = nargs(argv, av)))
goto out;
if (IS_ERR(r = nargs(envp, ae)))
goto out;
filename = getname((char *) (long)regs.regs[4]);
r = PTR_ERR(filename);
if (IS_ERR(filename))
goto out;
r = do_execve(filename, av, ae, ®s);
putname(filename);
if (IS_ERR(r))
out:
sys_munmap((unsigned long)av, len);
return(r);
}
#endif
struct dirent32 {
unsigned int d_ino;
unsigned int d_off;
unsigned short d_reclen;
char d_name[NAME_MAX + 1];
};
static void
xlate_dirent(void *dirent64, void *dirent32, long n)
{
long off;
struct dirent *dirp;
struct dirent32 *dirp32;
off = 0;
while (off < n) {
dirp = (struct dirent *)(dirent64 + off);
dirp32 = (struct dirent32 *)(dirent32 + off);
off += dirp->d_reclen;
dirp32->d_ino = dirp->d_ino;
dirp32->d_off = (unsigned int)dirp->d_off;
dirp32->d_reclen = dirp->d_reclen;
strncpy(dirp32->d_name, dirp->d_name, dirp->d_reclen - ((3 * 4) + 2));
}
return;
}
asmlinkage long sys_getdents(unsigned int fd, void * dirent, unsigned int count);
asmlinkage long
sys32_getdents(unsigned int fd, void * dirent32, unsigned int count)
{
long n;
void *dirent64;
dirent64 = (void *)((unsigned long)(dirent32 + (sizeof(long) - 1)) & ~(sizeof(long) - 1));
if ((n = sys_getdents(fd, dirent64, count - (dirent64 - dirent32))) < 0)
return(n);
xlate_dirent(dirent64, dirent32, n);
return(n);
}
asmlinkage int old_readdir(unsigned int fd, void * dirent, unsigned int count);
asmlinkage int
sys32_readdir(unsigned int fd, void * dirent32, unsigned int count)
{
int n;
struct dirent dirent64;
if ((n = old_readdir(fd, &dirent64, count)) < 0)
return(n);
xlate_dirent(&dirent64, dirent32, dirent64.d_reclen);
return(n);
}
struct timeval32
{
int tv_sec, tv_usec;
};
struct itimerval32
{
struct timeval32 it_interval;
struct timeval32 it_value;
};
struct rusage32 {
struct timeval32 ru_utime;
struct timeval32 ru_stime;
int ru_maxrss;
int ru_ixrss;
int ru_idrss;
int ru_isrss;
int ru_minflt;
int ru_majflt;
int ru_nswap;
int ru_inblock;
int ru_oublock;
int ru_msgsnd;
int ru_msgrcv;
int ru_nsignals;
int ru_nvcsw;
int ru_nivcsw;
};
static int
put_rusage (struct rusage32 *ru, struct rusage *r)
{
int err;
err = put_user (r->ru_utime.tv_sec, &ru->ru_utime.tv_sec);
err |= __put_user (r->ru_utime.tv_usec, &ru->ru_utime.tv_usec);
err |= __put_user (r->ru_stime.tv_sec, &ru->ru_stime.tv_sec);
err |= __put_user (r->ru_stime.tv_usec, &ru->ru_stime.tv_usec);
err |= __put_user (r->ru_maxrss, &ru->ru_maxrss);
err |= __put_user (r->ru_ixrss, &ru->ru_ixrss);
err |= __put_user (r->ru_idrss, &ru->ru_idrss);
err |= __put_user (r->ru_isrss, &ru->ru_isrss);
err |= __put_user (r->ru_minflt, &ru->ru_minflt);
err |= __put_user (r->ru_majflt, &ru->ru_majflt);
err |= __put_user (r->ru_nswap, &ru->ru_nswap);
err |= __put_user (r->ru_inblock, &ru->ru_inblock);
err |= __put_user (r->ru_oublock, &ru->ru_oublock);
err |= __put_user (r->ru_msgsnd, &ru->ru_msgsnd);
err |= __put_user (r->ru_msgrcv, &ru->ru_msgrcv);
err |= __put_user (r->ru_nsignals, &ru->ru_nsignals);
err |= __put_user (r->ru_nvcsw, &ru->ru_nvcsw);
err |= __put_user (r->ru_nivcsw, &ru->ru_nivcsw);
return err;
}
asmlinkage int
sys32_wait4(__kernel_pid_t32 pid, unsigned int * stat_addr, int options,
struct rusage32 * ru)
{
if (!ru)
return sys_wait4(pid, stat_addr, options, NULL);
else {
struct rusage r;
int ret;
unsigned int status;
mm_segment_t old_fs = get_fs();
set_fs(KERNEL_DS);
ret = sys_wait4(pid, stat_addr ? &status : NULL, options, &r);
set_fs(old_fs);
if (put_rusage (ru, &r)) return -EFAULT;
if (stat_addr && put_user (status, stat_addr))
return -EFAULT;
return ret;
}
}
asmlinkage int
sys32_waitpid(__kernel_pid_t32 pid, unsigned int *stat_addr, int options)
{
return sys32_wait4(pid, stat_addr, options, NULL);
}
#define RLIM_INFINITY32 0x7fffffff
#define RESOURCE32(x) ((x > RLIM_INFINITY32) ? RLIM_INFINITY32 : x)
struct rlimit32 {
int rlim_cur;
int rlim_max;
};
extern asmlinkage int sys_old_getrlimit(unsigned int resource, struct rlimit *rlim);
asmlinkage int
sys32_getrlimit(unsigned int resource, struct rlimit32 *rlim)
{
struct rlimit r;
int ret;
mm_segment_t old_fs = get_fs ();
set_fs (KERNEL_DS);
ret = sys_old_getrlimit(resource, &r);
set_fs (old_fs);
if (!ret) {
ret = put_user (RESOURCE32(r.rlim_cur), &rlim->rlim_cur);
ret |= __put_user (RESOURCE32(r.rlim_max), &rlim->rlim_max);
}
return ret;
}
extern asmlinkage int sys_setrlimit(unsigned int resource, struct rlimit *rlim);
asmlinkage int
sys32_setrlimit(unsigned int resource, struct rlimit32 *rlim)
{
struct rlimit r;
int ret;
mm_segment_t old_fs = get_fs ();
if (resource >= RLIM_NLIMITS) return -EINVAL;
if (get_user (r.rlim_cur, &rlim->rlim_cur) ||
__get_user (r.rlim_max, &rlim->rlim_max))
return -EFAULT;
if (r.rlim_cur == RLIM_INFINITY32)
r.rlim_cur = RLIM_INFINITY;
if (r.rlim_max == RLIM_INFINITY32)
r.rlim_max = RLIM_INFINITY;
set_fs (KERNEL_DS);
ret = sys_setrlimit(resource, &r);
set_fs (old_fs);
return ret;
}
struct statfs32 {
int f_type;
int f_bsize;
int f_frsize;
int f_blocks;
int f_bfree;
int f_files;
int f_ffree;
int f_bavail;
__kernel_fsid_t32 f_fsid;
int f_namelen;
int f_spare[6];
};
static inline int
put_statfs (struct statfs32 *ubuf, struct statfs *kbuf)
{
int err;
err = put_user (kbuf->f_type, &ubuf->f_type);
err |= __put_user (kbuf->f_bsize, &ubuf->f_bsize);
err |= __put_user (kbuf->f_blocks, &ubuf->f_blocks);
err |= __put_user (kbuf->f_bfree, &ubuf->f_bfree);
err |= __put_user (kbuf->f_bavail, &ubuf->f_bavail);
err |= __put_user (kbuf->f_files, &ubuf->f_files);
err |= __put_user (kbuf->f_ffree, &ubuf->f_ffree);
err |= __put_user (kbuf->f_namelen, &ubuf->f_namelen);
err |= __put_user (kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]);
err |= __put_user (kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]);
return err;
}
extern asmlinkage int sys_statfs(const char * path, struct statfs * buf);
asmlinkage int
sys32_statfs(const char * path, struct statfs32 *buf)
{
int ret;
struct statfs s;
mm_segment_t old_fs = get_fs();
set_fs (KERNEL_DS);
ret = sys_statfs((const char *)path, &s);
set_fs (old_fs);
if (put_statfs(buf, &s))
return -EFAULT;
return ret;
}
extern asmlinkage int sys_fstatfs(unsigned int fd, struct statfs * buf);
asmlinkage int
sys32_fstatfs(unsigned int fd, struct statfs32 *buf)
{
int ret;
struct statfs s;
mm_segment_t old_fs = get_fs();
set_fs (KERNEL_DS);
ret = sys_fstatfs(fd, &s);
set_fs (old_fs);
if (put_statfs(buf, &s))
return -EFAULT;
return ret;
}
extern asmlinkage int
sys_getrusage(int who, struct rusage *ru);
asmlinkage int
sys32_getrusage(int who, struct rusage32 *ru)
{
struct rusage r;
int ret;
mm_segment_t old_fs = get_fs();
set_fs (KERNEL_DS);
ret = sys_getrusage(who, &r);
set_fs (old_fs);
if (put_rusage (ru, &r))
return -EFAULT;
return ret;
}
static inline long
get_tv32(struct timeval *o, struct timeval32 *i)
{
return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
(__get_user(o->tv_sec, &i->tv_sec) |
__get_user(o->tv_usec, &i->tv_usec)));
}
static inline long
get_it32(struct itimerval *o, struct itimerval32 *i)
{
return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
(__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) |
__get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) |
__get_user(o->it_value.tv_sec, &i->it_value.tv_sec) |
__get_user(o->it_value.tv_usec, &i->it_value.tv_usec)));
}
static inline long
put_tv32(struct timeval32 *o, struct timeval *i)
{
return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
(__put_user(i->tv_sec, &o->tv_sec) |
__put_user(i->tv_usec, &o->tv_usec)));
}
static inline long
put_it32(struct itimerval32 *o, struct itimerval *i)
{
return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
(__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) |
__put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) |
__put_user(i->it_value.tv_sec, &o->it_value.tv_sec) |
__put_user(i->it_value.tv_usec, &o->it_value.tv_usec)));
}
extern int do_getitimer(int which, struct itimerval *value);
asmlinkage int
sys32_getitimer(int which, struct itimerval32 *it)
{
struct itimerval kit;
int error;
error = do_getitimer(which, &kit);
if (!error && put_it32(it, &kit))
error = -EFAULT;
return error;
}
extern int do_setitimer(int which, struct itimerval *, struct itimerval *);
asmlinkage int
sys32_setitimer(int which, struct itimerval32 *in, struct itimerval32 *out)
{
struct itimerval kin, kout;
int error;
if (in) {
if (get_it32(&kin, in))
return -EFAULT;
} else
memset(&kin, 0, sizeof(kin));
error = do_setitimer(which, &kin, out ? &kout : NULL);
if (error || !out)
return error;
if (put_it32(out, &kout))
return -EFAULT;
return 0;
}
asmlinkage unsigned long
sys32_alarm(unsigned int seconds)
{
struct itimerval it_new, it_old;
unsigned int oldalarm;
it_new.it_interval.tv_sec = it_new.it_interval.tv_usec = 0;
it_new.it_value.tv_sec = seconds;
it_new.it_value.tv_usec = 0;
do_setitimer(ITIMER_REAL, &it_new, &it_old);
oldalarm = it_old.it_value.tv_sec;
/* ehhh.. We can't return 0 if we have an alarm pending.. */
/* And we'd better return too much than too little anyway */
if (it_old.it_value.tv_usec)
oldalarm++;
return oldalarm;
}
/* Translations due to time_t size differences. Which affects all
sorts of things, like timeval and itimerval. */
extern struct timezone sys_tz;
extern int do_sys_settimeofday(struct timeval *tv, struct timezone *tz);
asmlinkage int
sys32_gettimeofday(struct timeval32 *tv, struct timezone *tz)
{
if (tv) {
struct timeval ktv;
do_gettimeofday(&ktv);
if (put_tv32(tv, &ktv))
return -EFAULT;
}
if (tz) {
if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
return -EFAULT;
}
return 0;
}
asmlinkage int
sys32_settimeofday(struct timeval32 *tv, struct timezone *tz)
{
struct timeval ktv;
struct timezone ktz;
if (tv) {
if (get_tv32(&ktv, tv))
return -EFAULT;
}
if (tz) {
if (copy_from_user(&ktz, tz, sizeof(ktz)))
return -EFAULT;
}
return do_sys_settimeofday(tv ? &ktv : NULL, tz ? &ktz : NULL);
}
extern asmlinkage long sys_llseek(unsigned int fd, unsigned long offset_high,
unsigned long offset_low, loff_t * result,
unsigned int origin);
extern asmlinkage int sys32_llseek(unsigned int fd, unsigned int offset_high,
unsigned int offset_low, loff_t * result,
unsigned int origin)
{
return sys_llseek(fd, offset_high, offset_low, result, origin);
}
struct iovec32 { unsigned int iov_base; int iov_len; };
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 iovec32 *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 iovec32)*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 = (void *)A(buf);
ivp->iov_len = (__kernel_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 iovec32 *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 iovec32 *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;
}
/* From the Single Unix Spec: pread & pwrite act like lseek to pos + op +
lseek back to original location. They fail just like lseek does on
non-seekable files. */
asmlinkage ssize_t sys32_pread(unsigned int fd, char * buf,
size_t count, u32 unused, loff_t pos)
{
ssize_t ret;
struct file * file;
ssize_t (*read)(struct file *, char *, size_t, loff_t *);
ret = -EBADF;
file = fget(fd);
if (!file)
goto bad_file;
if (!(file->f_mode & FMODE_READ))
goto out;
ret = locks_verify_area(FLOCK_VERIFY_READ, file->f_dentry->d_inode,
file, pos, count);
if (ret)
goto out;
ret = -EINVAL;
if (!file->f_op || !(read = file->f_op->read))
goto out;
if (pos < 0)
goto out;
ret = read(file, buf, count, &pos);
if (ret > 0)
dnotify_parent(file->f_dentry, DN_ACCESS);
out:
fput(file);
bad_file:
return ret;
}
asmlinkage ssize_t sys32_pwrite(unsigned int fd, const char * buf,
size_t count, u32 unused, loff_t pos)
{
ssize_t ret;
struct file * file;
ssize_t (*write)(struct file *, const char *, size_t, loff_t *);
ret = -EBADF;
file = fget(fd);
if (!file)
goto bad_file;
if (!(file->f_mode & FMODE_WRITE))
goto out;
ret = locks_verify_area(FLOCK_VERIFY_WRITE, file->f_dentry->d_inode,
file, pos, count);
if (ret)
goto out;
ret = -EINVAL;
if (!file->f_op || !(write = file->f_op->write))
goto out;
if (pos < 0)
goto out;
ret = write(file, buf, count, &pos);
if (ret > 0)
dnotify_parent(file->f_dentry, DN_MODIFY);
out:
fput(file);
bad_file:
return ret;
}
/*
* 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, unsigned long *fdset, u32 *ufdset)
{
#ifdef __MIPSEB__
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;
#else
<<Bomb - little endian support must define this>>
#endif
}
static inline void
set_fd_set32(unsigned long n, u32 *ufdset, unsigned long *fdset)
{
unsigned long odd;
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);
}
/*
* 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)
asmlinkage int sys32_select(int n, u32 *inp, u32 *outp, u32 *exp, struct timeval32 *tvp)
{
fd_set_bits fds;
char *bits;
unsigned long nn;
long timeout;
int ret, size;
timeout = MAX_SCHEDULE_TIMEOUT;
if (tvp) {
time_t sec, usec;
if ((ret = verify_area(VERIFY_READ, tvp, sizeof(*tvp)))
|| (ret = __get_user(sec, &tvp->tv_sec))
|| (ret = __get_user(usec, &tvp->tv_usec)))
goto out_nofds;
ret = -EINVAL;
if(sec < 0 || usec < 0)
goto out_nofds;
if ((unsigned long) sec < MAX_SELECT_SECONDS) {
timeout = (usec + 1000000/HZ - 1) / (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 = kmalloc(6 * size, GFP_KERNEL);
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);
nn = (n + 8*sizeof(u32) - 1) / (8*sizeof(u32));
if ((ret = get_fd_set32(nn, fds.in, inp)) ||
(ret = get_fd_set32(nn, fds.out, outp)) ||
(ret = get_fd_set32(nn, fds.ex, exp)))
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);
}
put_user(sec, &tvp->tv_sec);
put_user(usec, &tvp->tv_usec);
}
if (ret < 0)
goto out;
if (!ret) {
ret = -ERESTARTNOHAND;
if (signal_pending(current))
goto out;
ret = 0;
}
set_fd_set32(nn, inp, fds.res_in);
set_fd_set32(nn, outp, fds.res_out);
set_fd_set32(nn, exp, fds.res_ex);
out:
kfree(bits);
out_nofds:
return ret;
}
struct timespec32 {
int tv_sec;
int tv_nsec;
};
extern asmlinkage int sys_sched_rr_get_interval(pid_t pid,
struct timespec *interval);
asmlinkage int
sys32_sched_rr_get_interval(__kernel_pid_t32 pid, struct timespec32 *interval)
{
struct timespec t;
int ret;
mm_segment_t old_fs = get_fs ();
set_fs (KERNEL_DS);
ret = sys_sched_rr_get_interval(pid, &t);
set_fs (old_fs);
if (put_user (t.tv_sec, &interval->tv_sec) ||
__put_user (t.tv_nsec, &interval->tv_nsec))
return -EFAULT;
return ret;
}
extern asmlinkage int sys_nanosleep(struct timespec *rqtp,
struct timespec *rmtp);
asmlinkage int
sys32_nanosleep(struct timespec32 *rqtp, struct timespec32 *rmtp)
{
struct timespec t;
int ret;
mm_segment_t old_fs = get_fs ();
if (get_user (t.tv_sec, &rqtp->tv_sec) ||
__get_user (t.tv_nsec, &rqtp->tv_nsec))
return -EFAULT;
set_fs (KERNEL_DS);
ret = sys_nanosleep(&t, rmtp ? &t : NULL);
set_fs (old_fs);
if (rmtp && ret == -EINTR) {
if (__put_user (t.tv_sec, &rmtp->tv_sec) ||
__put_user (t.tv_nsec, &rmtp->tv_nsec))
return -EFAULT;
}
return ret;
}
struct tms32 {
int tms_utime;
int tms_stime;
int tms_cutime;
int tms_cstime;
};
extern asmlinkage long sys_times(struct tms * tbuf);
asmlinkage long sys32_times(struct tms32 *tbuf)
{
struct tms t;
long ret;
mm_segment_t old_fs = get_fs();
int err;
set_fs(KERNEL_DS);
ret = sys_times(tbuf ? &t : NULL);
set_fs(old_fs);
if (tbuf) {
err = put_user (t.tms_utime, &tbuf->tms_utime);
err |= __put_user (t.tms_stime, &tbuf->tms_stime);
err |= __put_user (t.tms_cutime, &tbuf->tms_cutime);
err |= __put_user (t.tms_cstime, &tbuf->tms_cstime);
if (err)
ret = -EFAULT;
}
return ret;
}
extern asmlinkage int sys_setsockopt(int fd, int level, int optname,
char *optval, int optlen);
asmlinkage int sys32_setsockopt(int fd, int level, int optname,
char *optval, int optlen)
{
if (optname == SO_ATTACH_FILTER) {
struct sock_fprog32 {
__u16 len;
__u32 filter;
} *fprog32 = (struct sock_fprog32 *)optval;
struct sock_fprog kfprog;
struct sock_filter *kfilter;
unsigned int fsize;
mm_segment_t old_fs;
__u32 uptr;
int ret;
if (get_user(kfprog.len, &fprog32->len) ||
__get_user(uptr, &fprog32->filter))
return -EFAULT;
kfprog.filter = (struct sock_filter *)A(uptr);
fsize = kfprog.len * sizeof(struct sock_filter);
kfilter = (struct sock_filter *)kmalloc(fsize, GFP_KERNEL);
if (kfilter == NULL)
return -ENOMEM;
if (copy_from_user(kfilter, kfprog.filter, fsize)) {
kfree(kfilter);
return -EFAULT;
}
kfprog.filter = kfilter;
old_fs = get_fs();
set_fs(KERNEL_DS);
ret = sys_setsockopt(fd, level, optname,
(char *)&kfprog, sizeof(kfprog));
set_fs(old_fs);
kfree(kfilter);
return ret;
}
return sys_setsockopt(fd, level, optname, optval, optlen);
}
struct flock32 {
short l_type;
short l_whence;
__kernel_off_t32 l_start;
__kernel_off_t32 l_len;
__kernel_pid_t32 l_pid;
short __unused;
};
static inline int get_flock(struct flock *kfl, struct flock32 *ufl)
{
int err;
err = get_user(kfl->l_type, &ufl->l_type);
err |= __get_user(kfl->l_whence, &ufl->l_whence);
err |= __get_user(kfl->l_start, &ufl->l_start);
err |= __get_user(kfl->l_len, &ufl->l_len);
err |= __get_user(kfl->l_pid, &ufl->l_pid);
return err;
}
static inline int put_flock(struct flock *kfl, struct flock32 *ufl)
{
int err;
err = __put_user(kfl->l_type, &ufl->l_type);
err |= __put_user(kfl->l_whence, &ufl->l_whence);
err |= __put_user(kfl->l_start, &ufl->l_start);
err |= __put_user(kfl->l_len, &ufl->l_len);
err |= __put_user(kfl->l_pid, &ufl->l_pid);
return err;
}
extern asmlinkage long
sys_fcntl(unsigned int fd, unsigned int cmd, unsigned long arg);
asmlinkage long
sys32_fcntl(unsigned int fd, unsigned int cmd, unsigned long arg)
{
switch (cmd) {
case F_GETLK:
case F_SETLK:
case F_SETLKW:
{
struct flock f;
mm_segment_t old_fs;
long ret;
if (get_flock(&f, (struct flock32 *)arg))
return -EFAULT;
old_fs = get_fs(); set_fs (KERNEL_DS);
ret = sys_fcntl(fd, cmd, (unsigned long)&f);
set_fs (old_fs);
if (put_flock(&f, (struct flock32 *)arg))
return -EFAULT;
return ret;
}
default:
return sys_fcntl(fd, cmd, (unsigned long)arg);
}
}
asmlinkage long
sys32_fcntl64(unsigned int fd, unsigned int cmd, unsigned long arg)
{
switch (cmd) {
case F_GETLK64:
return sys_fcntl(fd, F_GETLK, arg);
case F_SETLK64:
return sys_fcntl(fd, F_SETLK, arg);
case F_SETLKW64:
return sys_fcntl(fd, F_SETLKW, arg);
}
return sys32_fcntl(fd, cmd, arg);
}
struct msgbuf32 { s32 mtype; char mtext[1]; };
struct ipc_perm32
{
key_t key;
__kernel_uid_t32 uid;
__kernel_gid_t32 gid;
__kernel_uid_t32 cuid;
__kernel_gid_t32 cgid;
__kernel_mode_t32 mode;
unsigned short seq;
};
struct semid_ds32 {
struct ipc_perm32 sem_perm; /* permissions .. see ipc.h */
__kernel_time_t32 sem_otime; /* last semop time */
__kernel_time_t32 sem_ctime; /* last change time */
u32 sem_base; /* ptr to first semaphore in array */
u32 sem_pending; /* pending operations to be processed */
u32 sem_pending_last; /* last pending operation */
u32 undo; /* undo requests on this array */
unsigned short sem_nsems; /* no. of semaphores in array */
};
struct msqid_ds32
{
struct ipc_perm32 msg_perm;
u32 msg_first;
u32 msg_last;
__kernel_time_t32 msg_stime;
__kernel_time_t32 msg_rtime;
__kernel_time_t32 msg_ctime;
u32 wwait;
u32 rwait;
unsigned short msg_cbytes;
unsigned short msg_qnum;
unsigned short msg_qbytes;
__kernel_ipc_pid_t32 msg_lspid;
__kernel_ipc_pid_t32 msg_lrpid;
};
struct shmid_ds32 {
struct ipc_perm32 shm_perm;
int shm_segsz;
__kernel_time_t32 shm_atime;
__kernel_time_t32 shm_dtime;
__kernel_time_t32 shm_ctime;
__kernel_ipc_pid_t32 shm_cpid;
__kernel_ipc_pid_t32 shm_lpid;
unsigned short shm_nattch;
};
#define IPCOP_MASK(__x) (1UL << (__x))
static int
do_sys32_semctl(int first, int second, int third, void *uptr)
{
union semun fourth;
u32 pad;
int err, err2;
struct semid64_ds s;
struct semid_ds32 *usp;
mm_segment_t old_fs;
if (!uptr)
return -EINVAL;
err = -EFAULT;
if (get_user (pad, (u32 *)uptr))
return err;
if ((third & ~IPC_64) == SETVAL)
fourth.val = (int)pad;
else
fourth.__pad = (void *)A(pad);
switch (third & ~IPC_64) {
case IPC_INFO:
case IPC_RMID:
case IPC_SET:
case SEM_INFO:
case GETVAL:
case GETPID:
case GETNCNT:
case GETZCNT:
case GETALL:
case SETVAL:
case SETALL:
err = sys_semctl (first, second, third, fourth);
break;
case IPC_STAT:
case SEM_STAT:
usp = (struct semid_ds32 *)A(pad);
fourth.__pad = &s;
old_fs = get_fs ();
set_fs (KERNEL_DS);
err = sys_semctl (first, second, third, fourth);
set_fs (old_fs);
err2 = put_user(s.sem_perm.key, &usp->sem_perm.key);
err2 |= __put_user(s.sem_perm.uid, &usp->sem_perm.uid);
err2 |= __put_user(s.sem_perm.gid, &usp->sem_perm.gid);
err2 |= __put_user(s.sem_perm.cuid,
&usp->sem_perm.cuid);
err2 |= __put_user (s.sem_perm.cgid,
&usp->sem_perm.cgid);
err2 |= __put_user (s.sem_perm.mode,
&usp->sem_perm.mode);
err2 |= __put_user (s.sem_perm.seq, &usp->sem_perm.seq);
err2 |= __put_user (s.sem_otime, &usp->sem_otime);
err2 |= __put_user (s.sem_ctime, &usp->sem_ctime);
err2 |= __put_user (s.sem_nsems, &usp->sem_nsems);
if (err2)
err = -EFAULT;
break;
}
return err;
}
static int
do_sys32_msgsnd (int first, int second, int third, void *uptr)
{
struct msgbuf *p = kmalloc (second + sizeof (struct msgbuf)
+ 4, GFP_USER);
struct msgbuf32 *up = (struct msgbuf32 *)uptr;
mm_segment_t old_fs;
int err;
if (!p)
return -ENOMEM;
err = get_user (p->mtype, &up->mtype);
err |= __copy_from_user (p->mtext, &up->mtext, second);
if (err)
goto out;
old_fs = get_fs ();
set_fs (KERNEL_DS);
err = sys_msgsnd (first, p, second, third);
set_fs (old_fs);
out:
kfree (p);
return err;
}
static int
do_sys32_msgrcv (int first, int second, int msgtyp, int third,
int version, void *uptr)
{
struct msgbuf32 *up;
struct msgbuf *p;
mm_segment_t old_fs;
int err;
if (!version) {
struct ipc_kludge *uipck = (struct ipc_kludge *)uptr;
struct ipc_kludge ipck;
err = -EINVAL;
if (!uptr)
goto out;
err = -EFAULT;
if (copy_from_user (&ipck, uipck, sizeof (struct ipc_kludge)))
goto out;
uptr = (void *)A(ipck.msgp);
msgtyp = ipck.msgtyp;
}
err = -ENOMEM;
p = kmalloc (second + sizeof (struct msgbuf) + 4, GFP_USER);
if (!p)
goto out;
old_fs = get_fs ();
set_fs (KERNEL_DS);
err = sys_msgrcv (first, p, second + 4, msgtyp, third);
set_fs (old_fs);
if (err < 0)
goto free_then_out;
up = (struct msgbuf32 *)uptr;
if (put_user (p->mtype, &up->mtype) ||
__copy_to_user (&up->mtext, p->mtext, err))
err = -EFAULT;
free_then_out:
kfree (p);
out:
return err;
}
static int
do_sys32_msgctl (int first, int second, void *uptr)
{
int err = -EINVAL, err2;
struct msqid_ds m;
struct msqid64_ds m64;
struct msqid_ds32 *up = (struct msqid_ds32 *)uptr;
mm_segment_t old_fs;
switch (second) {
case IPC_INFO:
case IPC_RMID:
case MSG_INFO:
err = sys_msgctl (first, second, (struct msqid_ds *)uptr);
break;
case IPC_SET:
err = get_user (m.msg_perm.uid, &up->msg_perm.uid);
err |= __get_user (m.msg_perm.gid, &up->msg_perm.gid);
err |= __get_user (m.msg_perm.mode, &up->msg_perm.mode);
err |= __get_user (m.msg_qbytes, &up->msg_qbytes);
if (err)
break;
old_fs = get_fs ();
set_fs (KERNEL_DS);
err = sys_msgctl (first, second, &m);
set_fs (old_fs);
break;
case IPC_STAT:
case MSG_STAT:
old_fs = get_fs ();
set_fs (KERNEL_DS);
err = sys_msgctl (first, second, (void *) &m64);
set_fs (old_fs);
err2 = put_user (m64.msg_perm.key, &up->msg_perm.key);
err2 |= __put_user(m64.msg_perm.uid, &up->msg_perm.uid);
err2 |= __put_user(m64.msg_perm.gid, &up->msg_perm.gid);
err2 |= __put_user(m64.msg_perm.cuid, &up->msg_perm.cuid);
err2 |= __put_user(m64.msg_perm.cgid, &up->msg_perm.cgid);
err2 |= __put_user(m64.msg_perm.mode, &up->msg_perm.mode);
err2 |= __put_user(m64.msg_perm.seq, &up->msg_perm.seq);
err2 |= __put_user(m64.msg_stime, &up->msg_stime);
err2 |= __put_user(m64.msg_rtime, &up->msg_rtime);
err2 |= __put_user(m64.msg_ctime, &up->msg_ctime);
err2 |= __put_user(m64.msg_cbytes, &up->msg_cbytes);
err2 |= __put_user(m64.msg_qnum, &up->msg_qnum);
err2 |= __put_user(m64.msg_qbytes, &up->msg_qbytes);
err2 |= __put_user(m64.msg_lspid, &up->msg_lspid);
err2 |= __put_user(m64.msg_lrpid, &up->msg_lrpid);
if (err2)
err = -EFAULT;
break;
}
return err;
}
static int
do_sys32_shmat (int first, int second, int third, int version, void *uptr)
{
unsigned long raddr;
u32 *uaddr = (u32 *)A((u32)third);
int err = -EINVAL;
if (version == 1)
return err;
if (version == 1)
return err;
err = sys_shmat (first, uptr, second, &raddr);
if (err)
return err;
err = put_user (raddr, uaddr);
return err;
}
static int
do_sys32_shmctl (int first, int second, void *uptr)
{
int err = -EFAULT, err2;
struct shmid_ds s;
struct shmid64_ds s64;
struct shmid_ds32 *up = (struct shmid_ds32 *)uptr;
mm_segment_t old_fs;
struct shm_info32 {
int used_ids;
u32 shm_tot, shm_rss, shm_swp;
u32 swap_attempts, swap_successes;
} *uip = (struct shm_info32 *)uptr;
struct shm_info si;
switch (second) {
case IPC_INFO:
case IPC_RMID:
case SHM_LOCK:
case SHM_UNLOCK:
err = sys_shmctl (first, second, (struct shmid_ds *)uptr);
break;
case IPC_SET:
err = get_user (s.shm_perm.uid, &up->shm_perm.uid);
err |= __get_user (s.shm_perm.gid, &up->shm_perm.gid);
err |= __get_user (s.shm_perm.mode, &up->shm_perm.mode);
if (err)
break;
old_fs = get_fs ();
set_fs (KERNEL_DS);
err = sys_shmctl (first, second, &s);
set_fs (old_fs);
break;
case IPC_STAT:
case SHM_STAT:
old_fs = get_fs ();
set_fs (KERNEL_DS);
err = sys_shmctl (first, second, (void *) &s64);
set_fs (old_fs);
if (err < 0)
break;
err2 = put_user (s64.shm_perm.key, &up->shm_perm.key);
err2 |= __put_user (s64.shm_perm.uid, &up->shm_perm.uid);
err2 |= __put_user (s64.shm_perm.gid, &up->shm_perm.gid);
err2 |= __put_user (s64.shm_perm.cuid,
&up->shm_perm.cuid);
err2 |= __put_user (s64.shm_perm.cgid,
&up->shm_perm.cgid);
err2 |= __put_user (s64.shm_perm.mode,
&up->shm_perm.mode);
err2 |= __put_user (s64.shm_perm.seq, &up->shm_perm.seq);
err2 |= __put_user (s64.shm_atime, &up->shm_atime);
err2 |= __put_user (s64.shm_dtime, &up->shm_dtime);
err2 |= __put_user (s64.shm_ctime, &up->shm_ctime);
err2 |= __put_user (s64.shm_segsz, &up->shm_segsz);
err2 |= __put_user (s64.shm_nattch, &up->shm_nattch);
err2 |= __put_user (s64.shm_cpid, &up->shm_cpid);
err2 |= __put_user (s64.shm_lpid, &up->shm_lpid);
if (err2)
err = -EFAULT;
break;
case SHM_INFO:
old_fs = get_fs ();
set_fs (KERNEL_DS);
err = sys_shmctl (first, second, (void *)&si);
set_fs (old_fs);
if (err < 0)
break;
err2 = put_user (si.used_ids, &uip->used_ids);
err2 |= __put_user (si.shm_tot, &uip->shm_tot);
err2 |= __put_user (si.shm_rss, &uip->shm_rss);
err2 |= __put_user (si.shm_swp, &uip->shm_swp);
err2 |= __put_user (si.swap_attempts,
&uip->swap_attempts);
err2 |= __put_user (si.swap_successes,
&uip->swap_successes);
if (err2)
err = -EFAULT;
break;
}
return err;
}
asmlinkage long
sys32_ipc (u32 call, int first, int second, int third, u32 ptr, u32 fifth)
{
int version, err;
version = call >> 16; /* hack for backward compatibility */
call &= 0xffff;
switch (call) {
case SEMOP:
/* struct sembuf is the same on 32 and 64bit :)) */
err = sys_semop (first, (struct sembuf *)A(ptr),
second);
break;
case SEMGET:
err = sys_semget (first, second, third);
break;
case SEMCTL:
err = do_sys32_semctl (first, second, third,
(void *)A(ptr));
break;
case MSGSND:
err = do_sys32_msgsnd (first, second, third,
(void *)A(ptr));
break;
case MSGRCV:
err = do_sys32_msgrcv (first, second, fifth, third,
version, (void *)A(ptr));
break;
case MSGGET:
err = sys_msgget ((key_t) first, second);
break;
case MSGCTL:
err = do_sys32_msgctl (first, second, (void *)A(ptr));
break;
case SHMAT:
err = do_sys32_shmat (first, second, third,
version, (void *)A(ptr));
break;
case SHMDT:
err = sys_shmdt ((char *)A(ptr));
break;
case SHMGET:
err = sys_shmget (first, second, third);
break;
case SHMCTL:
err = do_sys32_shmctl (first, second, (void *)A(ptr));
break;
default:
err = -EINVAL;
break;
}
return err;
}
struct sysctl_args32
{
__kernel_caddr_t32 name;
int nlen;
__kernel_caddr_t32 oldval;
__kernel_caddr_t32 oldlenp;
__kernel_caddr_t32 newval;
__kernel_size_t32 newlen;
unsigned int __unused[4];
};
asmlinkage long sys32_sysctl(struct sysctl_args32 *uargs32)
{
struct __sysctl_args kargs;
struct sysctl_args32 kargs32;
mm_segment_t old_fs;
int name[CTL_MAXNAME];
size_t oldlen[1];
int err, ret;
ret = -EFAULT;
memset(&kargs, 0, sizeof (kargs));
err = get_user(kargs32.name, &uargs32->name);
err |= __get_user(kargs32.nlen, &uargs32->nlen);
err |= __get_user(kargs32.oldval, &uargs32->oldval);
err |= __get_user(kargs32.oldlenp, &uargs32->oldlenp);
err |= __get_user(kargs32.newval, &uargs32->newval);
err |= __get_user(kargs32.newlen, &uargs32->newlen);
if (err)
goto out;
if (kargs32.nlen == 0 || kargs32.nlen >= CTL_MAXNAME) {
ret = -ENOTDIR;
goto out;
}
kargs.name = name;
kargs.nlen = kargs32.nlen;
if (copy_from_user(kargs.name, (int *)A(kargs32.name),
kargs32.nlen * sizeof(name) / sizeof(name[0])))
goto out;
if (kargs32.oldval) {
if (!kargs32.oldlenp || get_user(oldlen[0],
(int *)A(kargs32.oldlenp)))
return -EFAULT;
kargs.oldlenp = oldlen;
kargs.oldval = kmalloc(oldlen[0], GFP_KERNEL);
if (!kargs.oldval) {
ret = -ENOMEM;
goto out;
}
}
if (kargs32.newval && kargs32.newlen) {
kargs.newval = kmalloc(kargs32.newlen, GFP_KERNEL);
if (!kargs.newval) {
ret = -ENOMEM;
goto out;
}
if (copy_from_user(kargs.newval, (int *)A(kargs32.newval),
kargs32.newlen))
goto out;
}
old_fs = get_fs(); set_fs (KERNEL_DS);
ret = sys_sysctl(&kargs);
set_fs (old_fs);
if (ret)
goto out;
if (kargs.oldval) {
if (put_user(oldlen[0], (int *)A(kargs32.oldlenp)) ||
copy_to_user((int *)A(kargs32.oldval), kargs.oldval,
oldlen[0]))
ret = -EFAULT;
}
out:
if (kargs.oldval)
kfree(kargs.oldval);
if (kargs.newval)
kfree(kargs.newval);
return ret;
}
asmlinkage long sys32_newuname(struct new_utsname * name)
{
int ret = 0;
down_read(&uts_sem);
if (copy_to_user(name,&system_utsname,sizeof *name))
ret = -EFAULT;
up_read(&uts_sem);
if (current->personality == PER_LINUX32 && !ret)
if (copy_to_user(name->machine, "mips\0\0\0", 8))
ret = -EFAULT;
return ret;
}
extern asmlinkage long sys_personality(unsigned long);
asmlinkage int sys32_personality(unsigned long personality)
{
int ret;
if (current->personality == PER_LINUX32 && personality == PER_LINUX)
personality = PER_LINUX32;
ret = sys_personality(personality);
if (ret == PER_LINUX32)
ret = PER_LINUX;
return ret;
}
/* Handle adjtimex compatability. */
struct timex32 {
u32 modes;
s32 offset, freq, maxerror, esterror;
s32 status, constant, precision, tolerance;
struct timeval32 time;
s32 tick;
s32 ppsfreq, jitter, shift, stabil;
s32 jitcnt, calcnt, errcnt, stbcnt;
s32 :32; s32 :32; s32 :32; s32 :32;
s32 :32; s32 :32; s32 :32; s32 :32;
s32 :32; s32 :32; s32 :32; s32 :32;
};
extern int do_adjtimex(struct timex *);
asmlinkage int sys32_adjtimex(struct timex32 *utp)
{
struct timex txc;
int ret;
memset(&txc, 0, sizeof(struct timex));
if(get_user(txc.modes, &utp->modes) ||
__get_user(txc.offset, &utp->offset) ||
__get_user(txc.freq, &utp->freq) ||
__get_user(txc.maxerror, &utp->maxerror) ||
__get_user(txc.esterror, &utp->esterror) ||
__get_user(txc.status, &utp->status) ||
__get_user(txc.constant, &utp->constant) ||
__get_user(txc.precision, &utp->precision) ||
__get_user(txc.tolerance, &utp->tolerance) ||
__get_user(txc.time.tv_sec, &utp->time.tv_sec) ||
__get_user(txc.time.tv_usec, &utp->time.tv_usec) ||
__get_user(txc.tick, &utp->tick) ||
__get_user(txc.ppsfreq, &utp->ppsfreq) ||
__get_user(txc.jitter, &utp->jitter) ||
__get_user(txc.shift, &utp->shift) ||
__get_user(txc.stabil, &utp->stabil) ||
__get_user(txc.jitcnt, &utp->jitcnt) ||
__get_user(txc.calcnt, &utp->calcnt) ||
__get_user(txc.errcnt, &utp->errcnt) ||
__get_user(txc.stbcnt, &utp->stbcnt))
return -EFAULT;
ret = do_adjtimex(&txc);
if(put_user(txc.modes, &utp->modes) ||
__put_user(txc.offset, &utp->offset) ||
__put_user(txc.freq, &utp->freq) ||
__put_user(txc.maxerror, &utp->maxerror) ||
__put_user(txc.esterror, &utp->esterror) ||
__put_user(txc.status, &utp->status) ||
__put_user(txc.constant, &utp->constant) ||
__put_user(txc.precision, &utp->precision) ||
__put_user(txc.tolerance, &utp->tolerance) ||
__put_user(txc.time.tv_sec, &utp->time.tv_sec) ||
__put_user(txc.time.tv_usec, &utp->time.tv_usec) ||
__put_user(txc.tick, &utp->tick) ||
__put_user(txc.ppsfreq, &utp->ppsfreq) ||
__put_user(txc.jitter, &utp->jitter) ||
__put_user(txc.shift, &utp->shift) ||
__put_user(txc.stabil, &utp->stabil) ||
__put_user(txc.jitcnt, &utp->jitcnt) ||
__put_user(txc.calcnt, &utp->calcnt) ||
__put_user(txc.errcnt, &utp->errcnt) ||
__put_user(txc.stbcnt, &utp->stbcnt))
ret = -EFAULT;
return ret;
}
/*
* Declare the 32-bit version of the msghdr
*/
struct msghdr32 {
unsigned int msg_name; /* Socket name */
int msg_namelen; /* Length of name */
unsigned int msg_iov; /* Data blocks */
unsigned int msg_iovlen; /* Number of blocks */
unsigned int msg_control; /* Per protocol magic (eg BSD file descriptor passing) */
unsigned int msg_controllen; /* Length of cmsg list */
unsigned msg_flags;
};
static inline int
shape_msg(struct msghdr *mp, struct msghdr32 *mp32)
{
int ret;
unsigned int i;
if (!access_ok(VERIFY_READ, mp32, sizeof(*mp32)))
return(-EFAULT);
ret = __get_user(i, &mp32->msg_name);
mp->msg_name = (void *)A(i);
ret |= __get_user(mp->msg_namelen, &mp32->msg_namelen);
ret |= __get_user(i, &mp32->msg_iov);
mp->msg_iov = (struct iovec *)A(i);
ret |= __get_user(mp->msg_iovlen, &mp32->msg_iovlen);
ret |= __get_user(i, &mp32->msg_control);
mp->msg_control = (void *)A(i);
ret |= __get_user(mp->msg_controllen, &mp32->msg_controllen);
ret |= __get_user(mp->msg_flags, &mp32->msg_flags);
return(ret ? -EFAULT : 0);
}
/*
* Verify & re-shape IA32 iovec. The caller must ensure that the
* iovec is big enough to hold the re-shaped message iovec.
*
* Save time not doing verify_area. copy_*_user will make this work
* in any case.
*
* Don't need to check the total size for overflow (cf net/core/iovec.c),
* 32-bit sizes can't overflow a 64-bit count.
*/
static inline int
verify_iovec32(struct msghdr *m, struct iovec *iov, char *address, int mode)
{
int size, err, ct;
struct iovec32 *iov32;
if(m->msg_namelen)
{
if(mode==VERIFY_READ)
{
err=move_addr_to_kernel(m->msg_name, m->msg_namelen, address);
if(err<0)
goto out;
}
m->msg_name = address;
} else
m->msg_name = NULL;
err = -EFAULT;
size = m->msg_iovlen * sizeof(struct iovec32);
if (copy_from_user(iov, m->msg_iov, size))
goto out;
m->msg_iov=iov;
err = 0;
iov32 = (struct iovec32 *)iov;
for (ct = m->msg_iovlen; ct-- > 0; ) {
iov[ct].iov_len = (__kernel_size_t)iov32[ct].iov_len;
iov[ct].iov_base = (void *) A(iov32[ct].iov_base);
err += iov[ct].iov_len;
}
out:
return err;
}
extern __inline__ void
sockfd_put(struct socket *sock)
{
fput(sock->file);
}
/* XXX This really belongs in some header file... -DaveM */
#define MAX_SOCK_ADDR 128 /* 108 for Unix domain -
16 for IP, 16 for IPX,
24 for IPv6,
about 80 for AX.25 */
extern struct socket *sockfd_lookup(int fd, int *err);
/*
* BSD sendmsg interface
*/
int sys32_sendmsg(int fd, struct msghdr32 *msg, unsigned flags)
{
struct socket *sock;
char address[MAX_SOCK_ADDR];
struct iovec iovstack[UIO_FASTIOV], *iov = iovstack;
unsigned char ctl[sizeof(struct cmsghdr) + 20]; /* 20 is size of ipv6_pktinfo */
unsigned char *ctl_buf = ctl;
struct msghdr msg_sys;
int err, ctl_len, iov_size, total_len;
err = -EFAULT;
if (shape_msg(&msg_sys, msg))
goto out;
sock = sockfd_lookup(fd, &err);
if (!sock)
goto out;
/* do not move before msg_sys is valid */
err = -EINVAL;
if (msg_sys.msg_iovlen > UIO_MAXIOV)
goto out_put;
/* Check whether to allocate the iovec area*/
err = -ENOMEM;
iov_size = msg_sys.msg_iovlen * sizeof(struct iovec32);
if (msg_sys.msg_iovlen > UIO_FASTIOV) {
iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL);
if (!iov)
goto out_put;
}
/* This will also move the address data into kernel space */
err = verify_iovec32(&msg_sys, iov, address, VERIFY_READ);
if (err < 0)
goto out_freeiov;
total_len = err;
err = -ENOBUFS;
if (msg_sys.msg_controllen > INT_MAX)
goto out_freeiov;
ctl_len = msg_sys.msg_controllen;
if (ctl_len)
{
if (ctl_len > sizeof(ctl))
{
err = -ENOBUFS;
ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL);
if (ctl_buf == NULL)
goto out_freeiov;
}
err = -EFAULT;
if (copy_from_user(ctl_buf, msg_sys.msg_control, ctl_len))
goto out_freectl;
msg_sys.msg_control = ctl_buf;
}
msg_sys.msg_flags = flags;
if (sock->file->f_flags & O_NONBLOCK)
msg_sys.msg_flags |= MSG_DONTWAIT;
err = sock_sendmsg(sock, &msg_sys, total_len);
out_freectl:
if (ctl_buf != ctl)
sock_kfree_s(sock->sk, ctl_buf, ctl_len);
out_freeiov:
if (iov != iovstack)
sock_kfree_s(sock->sk, iov, iov_size);
out_put:
sockfd_put(sock);
out:
return err;
}
/*
* BSD recvmsg interface
*/
int
sys32_recvmsg (int fd, struct msghdr32 *msg, unsigned int flags)
{
struct socket *sock;
struct iovec iovstack[UIO_FASTIOV];
struct iovec *iov=iovstack;
struct msghdr msg_sys;
unsigned long cmsg_ptr;
int err, iov_size, total_len, len;
/* kernel mode address */
char addr[MAX_SOCK_ADDR];
/* user mode address pointers */
struct sockaddr *uaddr;
int *uaddr_len;
err=-EFAULT;
if (shape_msg(&msg_sys, msg))
goto out;
sock = sockfd_lookup(fd, &err);
if (!sock)
goto out;
err = -EINVAL;
if (msg_sys.msg_iovlen > UIO_MAXIOV)
goto out_put;
/* Check whether to allocate the iovec area*/
err = -ENOMEM;
iov_size = msg_sys.msg_iovlen * sizeof(struct iovec);
if (msg_sys.msg_iovlen > UIO_FASTIOV) {
iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL);
if (!iov)
goto out_put;
}
/*
* Save the user-mode address (verify_iovec will change the
* kernel msghdr to use the kernel address space)
*/
uaddr = msg_sys.msg_name;
uaddr_len = &msg->msg_namelen;
err = verify_iovec32(&msg_sys, iov, addr, VERIFY_WRITE);
if (err < 0)
goto out_freeiov;
total_len=err;
cmsg_ptr = (unsigned long)msg_sys.msg_control;
msg_sys.msg_flags = 0;
if (sock->file->f_flags & O_NONBLOCK)
flags |= MSG_DONTWAIT;
err = sock_recvmsg(sock, &msg_sys, total_len, flags);
if (err < 0)
goto out_freeiov;
len = err;
if (uaddr != NULL) {
err = move_addr_to_user(addr, msg_sys.msg_namelen, uaddr, uaddr_len);
if (err < 0)
goto out_freeiov;
}
err = __put_user(msg_sys.msg_flags, &msg->msg_flags);
if (err)
goto out_freeiov;
err = __put_user((unsigned long)msg_sys.msg_control-cmsg_ptr,
&msg->msg_controllen);
if (err)
goto out_freeiov;
err = len;
out_freeiov:
if (iov != iovstack)
sock_kfree_s(sock->sk, iov, iov_size);
out_put:
sockfd_put(sock);
out:
return err;
}
|