ocfs2: Use compat_ptr in reflink_arguments.

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Although we use u64 to pass userspace pointers to the kernel
to avoid compat_ioctl, it doesn't work in some ppc platform.
So wrap them with compat_ptr and add compat_ioctl.

The detailed discussion about compat_ptr can be found in thread
http://lkml.org/lkml/2009/10/27/423.

We indeed met with a bug when testing on ppc(-EFAULT is returned
when using old_path). This patch try to fix this.
I have tested in ppc64(with 32 bit reflink) and x86_64(with i686
reflink), both works.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>

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Tao Ma 2010-01-27 10:21:52 +08:00 • committed by Joel Becker

parent cd34edd8cf

commit 34e6c59af0

1 changed files with 13 additions and 1 deletions

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fs/ocfs2/ioctl.c

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