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Merge branch 'compat-ioctl-merge' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground 

* 'compat-ioctl-merge' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground:
  usbdevfs: move compat_ioctl handling to devio.c
  lp: move compat_ioctl handling into lp.c
  compat_ioctl: pass compat pointer directly to handlers
  compat_ioctl: simplify lookup table
  compat_ioctl: simplify calling of handlers
  compat_ioctl: inline all conversion handlers
  compat_ioctl: Remove BKL
  compat_ioctl: remove all VT ioctl handling
This commit is contained in:
Linus Torvalds 2009-12-11 20:57:46 -08:00
parent a1c36e5206 637e8a60a7
commit 92340ee319
4 changed files with 417 additions and 601 deletions
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115
drivers/char/lp.c
View File

@ -127,6 +127,7 @@
#include <linux/wait.h>
#include <linux/jiffies.h>
#include <linux/smp_lock.h>
#include <linux/compat.h>
#include <linux/parport.h>
#undef LP_STATS
@ -571,13 +572,11 @@ static int lp_release(struct inode * inode, struct file * file)
return 0;
}
static int lp_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
static int lp_do_ioctl(unsigned int minor, unsigned int cmd,
unsigned long arg, void __user *argp)
{
unsigned int minor = iminor(inode);
int status;
int retval = 0;
void __user *argp = (void __user *)arg;
#ifdef LP_DEBUG
printk(KERN_DEBUG "lp%d ioctl, cmd: 0x%x, arg: 0x%lx\n", minor, cmd, arg);
@ -587,9 +586,6 @@ static int lp_ioctl(struct inode *inode, struct file *file,
if ((LP_F(minor) & LP_EXIST) == 0)
return -ENODEV;
switch ( cmd ) {
struct timeval par_timeout;
long to_jiffies;
case LPTIME:
LP_TIME(minor) = arg * HZ/100;
break;
@ -652,34 +648,101 @@ static int lp_ioctl(struct inode *inode, struct file *file,
return -EFAULT;
break;
case LPSETTIMEOUT:
if (copy_from_user (&par_timeout, argp,
sizeof (struct timeval))) {
return -EFAULT;
}
/* Convert to jiffies, place in lp_table */
if ((par_timeout.tv_sec < 0) ||
(par_timeout.tv_usec < 0)) {
return -EINVAL;
}
to_jiffies = DIV_ROUND_UP(par_timeout.tv_usec, 1000000/HZ);
to_jiffies += par_timeout.tv_sec * (long) HZ;
if (to_jiffies <= 0) {
return -EINVAL;
}
lp_table[minor].timeout = to_jiffies;
break;
default:
retval = -EINVAL;
}
return retval;
}
static int lp_set_timeout(unsigned int minor, struct timeval *par_timeout)
{
long to_jiffies;
/* Convert to jiffies, place in lp_table */
if ((par_timeout->tv_sec < 0) ||
(par_timeout->tv_usec < 0)) {
return -EINVAL;
}
to_jiffies = DIV_ROUND_UP(par_timeout->tv_usec, 1000000/HZ);
to_jiffies += par_timeout->tv_sec * (long) HZ;
if (to_jiffies <= 0) {
return -EINVAL;
}
lp_table[minor].timeout = to_jiffies;
return 0;
}
static long lp_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
unsigned int minor;
struct timeval par_timeout;
int ret;
minor = iminor(file->f_path.dentry->d_inode);
lock_kernel();
switch (cmd) {
case LPSETTIMEOUT:
if (copy_from_user(&par_timeout, (void __user *)arg,
sizeof (struct timeval))) {
ret = -EFAULT;
break;
}
ret = lp_set_timeout(minor, &par_timeout);
break;
default:
ret = lp_do_ioctl(minor, cmd, arg, (void __user *)arg);
break;
}
unlock_kernel();
return ret;
}
#ifdef CONFIG_COMPAT
static long lp_compat_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
unsigned int minor;
struct timeval par_timeout;
struct compat_timeval __user *tc;
int ret;
minor = iminor(file->f_path.dentry->d_inode);
lock_kernel();
switch (cmd) {
case LPSETTIMEOUT:
tc = compat_ptr(arg);
if (get_user(par_timeout.tv_sec, &tc->tv_sec) ||
get_user(par_timeout.tv_usec, &tc->tv_usec)) {
ret = -EFAULT;
break;
}
ret = lp_set_timeout(minor, &par_timeout);
break;
#ifdef LP_STATS
case LPGETSTATS:
/* FIXME: add an implementation if you set LP_STATS */
ret = -EINVAL;
break;
#endif
default:
ret = lp_do_ioctl(minor, cmd, arg, compat_ptr(arg));
break;
}
unlock_kernel();
return ret;
}
#endif
static const struct file_operations lp_fops = {
.owner = THIS_MODULE,
.write = lp_write,
.ioctl = lp_ioctl,
.unlocked_ioctl = lp_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = lp_compat_ioctl,
#endif
.open = lp_open,
.release = lp_release,
#ifdef CONFIG_PARPORT_1284

110
drivers/usb/core/devio.c
View File

@ -1388,6 +1388,46 @@ static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
}
#ifdef CONFIG_COMPAT
static int proc_control_compat(struct dev_state *ps,
struct usbdevfs_ctrltransfer32 __user *p32)
{
struct usbdevfs_ctrltransfer __user *p;
__u32 udata;
p = compat_alloc_user_space(sizeof(*p));
if (copy_in_user(p, p32, (sizeof(*p32) - sizeof(compat_caddr_t))) ||
get_user(udata, &p32->data) ||
put_user(compat_ptr(udata), &p->data))
return -EFAULT;
return proc_control(ps, p);
}
static int proc_bulk_compat(struct dev_state *ps,
struct usbdevfs_bulktransfer32 __user *p32)
{
struct usbdevfs_bulktransfer __user *p;
compat_uint_t n;
compat_caddr_t addr;
p = compat_alloc_user_space(sizeof(*p));
if (get_user(n, &p32->ep) || put_user(n, &p->ep) ||
get_user(n, &p32->len) || put_user(n, &p->len) ||
get_user(n, &p32->timeout) || put_user(n, &p->timeout) ||
get_user(addr, &p32->data) || put_user(compat_ptr(addr), &p->data))
return -EFAULT;
return proc_bulk(ps, p);
}
static int proc_disconnectsignal_compat(struct dev_state *ps, void __user *arg)
{
struct usbdevfs_disconnectsignal32 ds;
if (copy_from_user(&ds, arg, sizeof(ds)))
return -EFAULT;
ps->discsignr = ds.signr;
ps->disccontext = compat_ptr(ds.context);
return 0;
}
static int get_urb32(struct usbdevfs_urb *kurb,
struct usbdevfs_urb32 __user *uurb)
@ -1482,6 +1522,7 @@ static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg)
return processcompl_compat(as, (void __user * __user *)arg);
}
#endif
static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
@ -1648,12 +1689,12 @@ static int proc_release_port(struct dev_state *ps, void __user *arg)
* are assuming that somehow the configuration has been prevented from
* changing. But there's no mechanism to ensure that...
*/
static int usbdev_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
static long usbdev_do_ioctl(struct file *file, unsigned int cmd,
void __user *p)
{
struct dev_state *ps = file->private_data;
struct inode *inode = file->f_path.dentry->d_inode;
struct usb_device *dev = ps->dev;
void __user *p = (void __user *)arg;
int ret = -ENOTTY;
if (!(file->f_mode & FMODE_WRITE))
@ -1726,6 +1767,24 @@ static int usbdev_ioctl(struct inode *inode, struct file *file,
break;
#ifdef CONFIG_COMPAT
case USBDEVFS_CONTROL32:
snoop(&dev->dev, "%s: CONTROL32\n", __func__);
ret = proc_control_compat(ps, p);
if (ret >= 0)
inode->i_mtime = CURRENT_TIME;
break;
case USBDEVFS_BULK32:
snoop(&dev->dev, "%s: BULK32\n", __func__);
ret = proc_bulk_compat(ps, p);
if (ret >= 0)
inode->i_mtime = CURRENT_TIME;
break;
case USBDEVFS_DISCSIGNAL32:
snoop(&dev->dev, "%s: DISCSIGNAL32\n", __func__);
ret = proc_disconnectsignal_compat(ps, p);
break;
case USBDEVFS_SUBMITURB32:
snoop(&dev->dev, "%s: SUBMITURB32\n", __func__);
@ -1745,7 +1804,7 @@ static int usbdev_ioctl(struct inode *inode, struct file *file,
break;
case USBDEVFS_IOCTL32:
snoop(&dev->dev, "%s: IOCTL\n", __func__);
snoop(&dev->dev, "%s: IOCTL32\n", __func__);
ret = proc_ioctl_compat(ps, ptr_to_compat(p));
break;
#endif
@ -1801,6 +1860,32 @@ static int usbdev_ioctl(struct inode *inode, struct file *file,
return ret;
}
static long usbdev_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
int ret;
lock_kernel();
ret = usbdev_do_ioctl(file, cmd, (void __user *)arg);
unlock_kernel();
return ret;
}
#ifdef CONFIG_COMPAT
static long usbdev_compat_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
int ret;
lock_kernel();
ret = usbdev_do_ioctl(file, cmd, compat_ptr(arg));
unlock_kernel();
return ret;
}
#endif
/* No kernel lock - fine */
static unsigned int usbdev_poll(struct file *file,
struct poll_table_struct *wait)
@ -1817,13 +1902,16 @@ static unsigned int usbdev_poll(struct file *file,
}
const struct file_operations usbdev_file_operations = {
.owner = THIS_MODULE,
.llseek = usbdev_lseek,
.read = usbdev_read,
.poll = usbdev_poll,
.ioctl = usbdev_ioctl,
.open = usbdev_open,
.release = usbdev_release,
.owner = THIS_MODULE,
.llseek = usbdev_lseek,
.read = usbdev_read,
.poll = usbdev_poll,
.unlocked_ioctl = usbdev_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = usbdev_compat_ioctl,
#endif
.open = usbdev_open,
.release = usbdev_release,
};
static void usbdev_remove(struct usb_device *udev)

767
fs/compat_ioctl.c
View File

File diff suppressed because it is too large Load Diff

26
include/linux/usbdevice_fs.h
View File

@ -128,6 +128,29 @@ struct usbdevfs_hub_portinfo {
#ifdef __KERNEL__
#ifdef CONFIG_COMPAT
#include <linux/compat.h>
struct usbdevfs_ctrltransfer32 {
u8 bRequestType;
u8 bRequest;
u16 wValue;
u16 wIndex;
u16 wLength;
u32 timeout; /* in milliseconds */
compat_caddr_t data;
};
struct usbdevfs_bulktransfer32 {
compat_uint_t ep;
compat_uint_t len;
compat_uint_t timeout; /* in milliseconds */
compat_caddr_t data;
};
struct usbdevfs_disconnectsignal32 {
compat_int_t signr;
compat_caddr_t context;
};
struct usbdevfs_urb32 {
unsigned char type;
unsigned char endpoint;
@ -153,7 +176,9 @@ struct usbdevfs_ioctl32 {
#endif /* __KERNEL__ */
#define USBDEVFS_CONTROL _IOWR('U', 0, struct usbdevfs_ctrltransfer)
#define USBDEVFS_CONTROL32 _IOWR('U', 0, struct usbdevfs_ctrltransfer32)
#define USBDEVFS_BULK _IOWR('U', 2, struct usbdevfs_bulktransfer)
#define USBDEVFS_BULK32 _IOWR('U', 2, struct usbdevfs_bulktransfer32)
#define USBDEVFS_RESETEP _IOR('U', 3, unsigned int)
#define USBDEVFS_SETINTERFACE _IOR('U', 4, struct usbdevfs_setinterface)
#define USBDEVFS_SETCONFIGURATION _IOR('U', 5, unsigned int)
@ -166,6 +191,7 @@ struct usbdevfs_ioctl32 {
#define USBDEVFS_REAPURBNDELAY _IOW('U', 13, void *)
#define USBDEVFS_REAPURBNDELAY32 _IOW('U', 13, __u32)
#define USBDEVFS_DISCSIGNAL _IOR('U', 14, struct usbdevfs_disconnectsignal)
#define USBDEVFS_DISCSIGNAL32 _IOR('U', 14, struct usbdevfs_disconnectsignal32)
#define USBDEVFS_CLAIMINTERFACE _IOR('U', 15, unsigned int)
#define USBDEVFS_RELEASEINTERFACE _IOR('U', 16, unsigned int)
#define USBDEVFS_CONNECTINFO _IOW('U', 17, struct usbdevfs_connectinfo)