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IB/uverbs: Add ioctl support for 32bit processes

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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>
This commit is contained in:
Matan Barak 2018-02-13 12:18:34 +02:00 committed by Jason Gunthorpe
parent 5d2beb576d
commit 9dfb2ff400
1 changed files with 2 additions and 0 deletions
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2
drivers/infiniband/core/uverbs_main.c
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@ -942,6 +942,7 @@ static const struct file_operations uverbs_fops = {
.llseek = no_llseek, .llseek = no_llseek,
#if IS_ENABLED(CONFIG_INFINIBAND_EXP_USER_ACCESS) #if IS_ENABLED(CONFIG_INFINIBAND_EXP_USER_ACCESS)
.unlocked_ioctl = ib_uverbs_ioctl, .unlocked_ioctl = ib_uverbs_ioctl,
.compat_ioctl = ib_uverbs_ioctl,
#endif #endif
}; };
@ -954,6 +955,7 @@ static const struct file_operations uverbs_mmap_fops = {
.llseek = no_llseek, .llseek = no_llseek,
#if IS_ENABLED(CONFIG_INFINIBAND_EXP_USER_ACCESS) #if IS_ENABLED(CONFIG_INFINIBAND_EXP_USER_ACCESS)
.unlocked_ioctl = ib_uverbs_ioctl, .unlocked_ioctl = ib_uverbs_ioctl,
.compat_ioctl = ib_uverbs_ioctl,
#endif #endif
}; };