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USB: usbmon: Implement compat_ioctl 

Running a 32-bit usbmon(8) on 2.6.28-rc9 produces the following:
ioctl32(usbmon:28563): Unknown cmd fd(3) cmd(400c9206){t:ffffff92;sz:12} arg(ffd3f458) on /dev/usbmon0

It happens because the compatibility mode was implemented for 2.6.18
and not updated for the fsops.compat_ioctl API.

This patch relocates the pieces from under #ifdef CONFIG_COMPAT into
compat_ioctl with no other changes except one new whitespace.

Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Pete Zaitcev 2008-12-20 12:56:08 -07:00 committed by Greg Kroah-Hartman
parent 11e76ae0f3
commit 7abce6bedc
1 changed files with 71 additions and 44 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

115
drivers/usb/mon/mon_bin.c
View File

@ -37,6 +37,7 @@
#define MON_IOCX_GET _IOW(MON_IOC_MAGIC, 6, struct mon_bin_get)
#define MON_IOCX_MFETCH _IOWR(MON_IOC_MAGIC, 7, struct mon_bin_mfetch)
#define MON_IOCH_MFLUSH _IO(MON_IOC_MAGIC, 8)
#ifdef CONFIG_COMPAT
#define MON_IOCX_GET32 _IOW(MON_IOC_MAGIC, 6, struct mon_bin_get32)
#define MON_IOCX_MFETCH32 _IOWR(MON_IOC_MAGIC, 7, struct mon_bin_mfetch32)
@ -921,21 +922,6 @@ static int mon_bin_ioctl(struct inode *inode, struct file *file,
}
break;
#ifdef CONFIG_COMPAT
case MON_IOCX_GET32: {
struct mon_bin_get32 getb;
if (copy_from_user(&getb, (void __user *)arg,
sizeof(struct mon_bin_get32)))
return -EFAULT;
ret = mon_bin_get_event(file, rp,
compat_ptr(getb.hdr32), compat_ptr(getb.data32),
getb.alloc32);
}
break;
#endif
case MON_IOCX_MFETCH:
{
struct mon_bin_mfetch mfetch;
@ -962,35 +948,6 @@ static int mon_bin_ioctl(struct inode *inode, struct file *file,
}
break;
#ifdef CONFIG_COMPAT
case MON_IOCX_MFETCH32:
{
struct mon_bin_mfetch32 mfetch;
struct mon_bin_mfetch32 __user *uptr;
uptr = (struct mon_bin_mfetch32 __user *) compat_ptr(arg);
if (copy_from_user(&mfetch, uptr, sizeof(mfetch)))
return -EFAULT;
if (mfetch.nflush32) {
ret = mon_bin_flush(rp, mfetch.nflush32);
if (ret < 0)
return ret;
if (put_user(ret, &uptr->nflush32))
return -EFAULT;
}
ret = mon_bin_fetch(file, rp, compat_ptr(mfetch.offvec32),
mfetch.nfetch32);
if (ret < 0)
return ret;
if (put_user(ret, &uptr->nfetch32))
return -EFAULT;
ret = 0;
}
break;
#endif
case MON_IOCG_STATS: {
struct mon_bin_stats __user *sp;
unsigned int nevents;
@ -1018,6 +975,73 @@ static int mon_bin_ioctl(struct inode *inode, struct file *file,
return ret;
}
#ifdef CONFIG_COMPAT
static long mon_bin_compat_ioctl(struct file *file,
unsigned int cmd, unsigned long arg)
{
struct mon_reader_bin *rp = file->private_data;
int ret;
switch (cmd) {
case MON_IOCX_GET32: {
struct mon_bin_get32 getb;
if (copy_from_user(&getb, (void __user *)arg,
sizeof(struct mon_bin_get32)))
return -EFAULT;
ret = mon_bin_get_event(file, rp,
compat_ptr(getb.hdr32), compat_ptr(getb.data32),
getb.alloc32);
if (ret < 0)
return ret;
}
return 0;
case MON_IOCX_MFETCH32:
{
struct mon_bin_mfetch32 mfetch;
struct mon_bin_mfetch32 __user *uptr;
uptr = (struct mon_bin_mfetch32 __user *) compat_ptr(arg);
if (copy_from_user(&mfetch, uptr, sizeof(mfetch)))
return -EFAULT;
if (mfetch.nflush32) {
ret = mon_bin_flush(rp, mfetch.nflush32);
if (ret < 0)
return ret;
if (put_user(ret, &uptr->nflush32))
return -EFAULT;
}
ret = mon_bin_fetch(file, rp, compat_ptr(mfetch.offvec32),
mfetch.nfetch32);
if (ret < 0)
return ret;
if (put_user(ret, &uptr->nfetch32))
return -EFAULT;
}
return 0;
case MON_IOCG_STATS:
return mon_bin_ioctl(NULL, file, cmd,
(unsigned long) compat_ptr(arg));
case MON_IOCQ_URB_LEN:
case MON_IOCQ_RING_SIZE:
case MON_IOCT_RING_SIZE:
case MON_IOCH_MFLUSH:
return mon_bin_ioctl(NULL, file, cmd, arg);
default:
;
}
return -ENOTTY;
}
#endif /* CONFIG_COMPAT */
static unsigned int
mon_bin_poll(struct file *file, struct poll_table_struct *wait)
{
@ -1094,6 +1118,9 @@ static const struct file_operations mon_fops_binary = {
/* .write = mon_text_write, */
.poll = mon_bin_poll,
.ioctl = mon_bin_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = mon_bin_compat_ioctl,
#endif
.release = mon_bin_release,
.mmap = mon_bin_mmap,
};