mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-20 14:16:02 +00:00
take compat TIOC[SG]SERIAL treatment into tty_compat_ioctl()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
parent
f82fc0fedf
commit
7765435030
2 changed files with 81 additions and 67 deletions
|
@ -2651,6 +2651,81 @@ long tty_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
|||
}
|
||||
|
||||
#ifdef CONFIG_COMPAT
|
||||
|
||||
struct serial_struct32 {
|
||||
compat_int_t type;
|
||||
compat_int_t line;
|
||||
compat_uint_t port;
|
||||
compat_int_t irq;
|
||||
compat_int_t flags;
|
||||
compat_int_t xmit_fifo_size;
|
||||
compat_int_t custom_divisor;
|
||||
compat_int_t baud_base;
|
||||
unsigned short close_delay;
|
||||
char io_type;
|
||||
char reserved_char[1];
|
||||
compat_int_t hub6;
|
||||
unsigned short closing_wait; /* time to wait before closing */
|
||||
unsigned short closing_wait2; /* no longer used... */
|
||||
compat_uint_t iomem_base;
|
||||
unsigned short iomem_reg_shift;
|
||||
unsigned int port_high;
|
||||
/* compat_ulong_t iomap_base FIXME */
|
||||
compat_int_t reserved[1];
|
||||
};
|
||||
|
||||
static int compat_tty_tiocsserial(struct tty_struct *tty,
|
||||
struct serial_struct32 __user *ss)
|
||||
{
|
||||
static DEFINE_RATELIMIT_STATE(depr_flags,
|
||||
DEFAULT_RATELIMIT_INTERVAL,
|
||||
DEFAULT_RATELIMIT_BURST);
|
||||
char comm[TASK_COMM_LEN];
|
||||
struct serial_struct32 v32;
|
||||
struct serial_struct v;
|
||||
int flags;
|
||||
|
||||
if (copy_from_user(&v32, ss, sizeof(struct serial_struct32)))
|
||||
return -EFAULT;
|
||||
|
||||
memcpy(&v, &v32, offsetof(struct serial_struct32, iomem_base));
|
||||
v.iomem_base = compat_ptr(v32.iomem_base);
|
||||
v.iomem_reg_shift = v32.iomem_reg_shift;
|
||||
v.port_high = v32.port_high;
|
||||
v.iomap_base = 0;
|
||||
|
||||
flags = v.flags & ASYNC_DEPRECATED;
|
||||
|
||||
if (flags && __ratelimit(&depr_flags))
|
||||
pr_warn("%s: '%s' is using deprecated serial flags (with no effect): %.8x\n",
|
||||
__func__, get_task_comm(comm, current), flags);
|
||||
if (!tty->ops->set_serial)
|
||||
return -ENOTTY;
|
||||
return tty->ops->set_serial(tty, &v);
|
||||
}
|
||||
|
||||
static int compat_tty_tiocgserial(struct tty_struct *tty,
|
||||
struct serial_struct32 __user *ss)
|
||||
{
|
||||
struct serial_struct32 v32;
|
||||
struct serial_struct v;
|
||||
int err;
|
||||
memset(&v, 0, sizeof(struct serial_struct));
|
||||
|
||||
if (!tty->ops->set_serial)
|
||||
return -ENOTTY;
|
||||
err = tty->ops->get_serial(tty, &v);
|
||||
if (!err) {
|
||||
memcpy(&v32, &v, offsetof(struct serial_struct32, iomem_base));
|
||||
v32.iomem_base = (unsigned long)v.iomem_base >> 32 ?
|
||||
0xfffffff : ptr_to_compat(v.iomem_base);
|
||||
v32.iomem_reg_shift = v.iomem_reg_shift;
|
||||
v32.port_high = v.port_high;
|
||||
if (copy_to_user(ss, &v32, sizeof(struct serial_struct32)))
|
||||
err = -EFAULT;
|
||||
}
|
||||
return err;
|
||||
}
|
||||
static long tty_compat_ioctl(struct file *file, unsigned int cmd,
|
||||
unsigned long arg)
|
||||
{
|
||||
|
@ -2736,6 +2811,12 @@ static long tty_compat_ioctl(struct file *file, unsigned int cmd,
|
|||
if (tty_paranoia_check(tty, file_inode(file), "tty_ioctl"))
|
||||
return -EINVAL;
|
||||
|
||||
switch (cmd) {
|
||||
case TIOCSSERIAL:
|
||||
return compat_tty_tiocsserial(tty, compat_ptr(arg));
|
||||
case TIOCGSERIAL:
|
||||
return compat_tty_tiocgserial(tty, compat_ptr(arg));
|
||||
}
|
||||
if (tty->ops->compat_ioctl) {
|
||||
retval = tty->ops->compat_ioctl(tty, cmd, arg);
|
||||
if (retval != -ENOIOCTLCMD)
|
||||
|
|
|
@ -560,69 +560,6 @@ static int mt_ioctl_trans(struct file *file,
|
|||
#define HIDPGETCONNLIST _IOR('H', 210, int)
|
||||
#define HIDPGETCONNINFO _IOR('H', 211, int)
|
||||
|
||||
|
||||
struct serial_struct32 {
|
||||
compat_int_t type;
|
||||
compat_int_t line;
|
||||
compat_uint_t port;
|
||||
compat_int_t irq;
|
||||
compat_int_t flags;
|
||||
compat_int_t xmit_fifo_size;
|
||||
compat_int_t custom_divisor;
|
||||
compat_int_t baud_base;
|
||||
unsigned short close_delay;
|
||||
char io_type;
|
||||
char reserved_char[1];
|
||||
compat_int_t hub6;
|
||||
unsigned short closing_wait; /* time to wait before closing */
|
||||
unsigned short closing_wait2; /* no longer used... */
|
||||
compat_uint_t iomem_base;
|
||||
unsigned short iomem_reg_shift;
|
||||
unsigned int port_high;
|
||||
/* compat_ulong_t iomap_base FIXME */
|
||||
compat_int_t reserved[1];
|
||||
};
|
||||
|
||||
static int serial_struct_ioctl(struct file *file,
|
||||
unsigned cmd, struct serial_struct32 __user *ss32)
|
||||
{
|
||||
typedef struct serial_struct32 SS32;
|
||||
int err;
|
||||
struct serial_struct __user *ss = compat_alloc_user_space(sizeof(*ss));
|
||||
__u32 udata;
|
||||
unsigned int base;
|
||||
unsigned char *iomem_base;
|
||||
|
||||
if (ss == NULL)
|
||||
return -EFAULT;
|
||||
if (cmd == TIOCSSERIAL) {
|
||||
if (copy_in_user(ss, ss32, offsetof(SS32, iomem_base)) ||
|
||||
get_user(udata, &ss32->iomem_base))
|
||||
return -EFAULT;
|
||||
iomem_base = compat_ptr(udata);
|
||||
if (put_user(iomem_base, &ss->iomem_base) ||
|
||||
convert_in_user(&ss32->iomem_reg_shift,
|
||||
&ss->iomem_reg_shift) ||
|
||||
convert_in_user(&ss32->port_high, &ss->port_high) ||
|
||||
put_user(0UL, &ss->iomap_base))
|
||||
return -EFAULT;
|
||||
}
|
||||
err = do_ioctl(file, cmd, (unsigned long)ss);
|
||||
if (cmd == TIOCGSERIAL && err >= 0) {
|
||||
if (copy_in_user(ss32, ss, offsetof(SS32, iomem_base)) ||
|
||||
get_user(iomem_base, &ss->iomem_base))
|
||||
return -EFAULT;
|
||||
base = (unsigned long)iomem_base >> 32 ?
|
||||
0xffffffff : (unsigned)(unsigned long)iomem_base;
|
||||
if (put_user(base, &ss32->iomem_base) ||
|
||||
convert_in_user(&ss->iomem_reg_shift,
|
||||
&ss32->iomem_reg_shift) ||
|
||||
convert_in_user(&ss->port_high, &ss32->port_high))
|
||||
return -EFAULT;
|
||||
}
|
||||
return err;
|
||||
}
|
||||
|
||||
#define RTC_IRQP_READ32 _IOR('p', 0x0b, compat_ulong_t)
|
||||
#define RTC_IRQP_SET32 _IOW('p', 0x0c, compat_ulong_t)
|
||||
#define RTC_EPOCH_READ32 _IOR('p', 0x0d, compat_ulong_t)
|
||||
|
@ -1242,10 +1179,6 @@ static long do_ioctl_trans(unsigned int cmd,
|
|||
case MTIOCPOS32:
|
||||
return mt_ioctl_trans(file, cmd, argp);
|
||||
#endif
|
||||
/* Serial */
|
||||
case TIOCGSERIAL:
|
||||
case TIOCSSERIAL:
|
||||
return serial_struct_ioctl(file, cmd, argp);
|
||||
/* Not implemented in the native kernel */
|
||||
case RTC_IRQP_READ32:
|
||||
case RTC_IRQP_SET32:
|
||||
|
|
Loading…
Reference in a new issue