Commit 9dfb2ff4 authored Feb 13, 2018 by Matan Barak Committed by Jason Gunthorpe Feb 15, 2018

IB/uverbs: Add ioctl support for 32bit processes



32 bit processes running on a 64 bit kernel call compat_ioctl so that
implementations can revise any structure layout issues. Point compat_ioctl
at our normal ioctl because:

- All our structures are designed to be the same on 32 and 64 bit, ie we
  use __aligned_u64 when required and are careful to manage padding.

- Any pointers are stored in u64's and userspace is expected
  to prepare them properly.

Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

parent 5d2beb57

drivers/infiniband/core/uverbs_main.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -942,6 +942,7 @@ static const struct file_operations uverbs_fops = {
		.llseek = no_llseek,
		#if IS_ENABLED(CONFIG_INFINIBAND_EXP_USER_ACCESS)
		.unlocked_ioctl = ib_uverbs_ioctl,
		.compat_ioctl = ib_uverbs_ioctl,
		#endif
		};

		@@ -954,6 +955,7 @@ static const struct file_operations uverbs_mmap_fops = {
		.llseek = no_llseek,
		#if IS_ENABLED(CONFIG_INFINIBAND_EXP_USER_ACCESS)
		.unlocked_ioctl = ib_uverbs_ioctl,
		.compat_ioctl = ib_uverbs_ioctl,
		#endif
		};