I am not Christoph, we collaborated and he sent me this patch.
On Tue, Sep 16, 2014 at 3:27 PM, Jeff Moyer <jmoyer@xxxxxxxxxx> wrote:
> Christoph Hellwig <milosz@xxxxxxxxx> writes:
>
> Hrm, you're not Christoph...
>
>> Acked-by: Milosz Tanski <milosz@xxxxxxxxx>
>> ---
>> fs/ceph/file.c | 2 ++
>> fs/cifs/file.c | 6 ++++++
>> fs/nfs/file.c | 5 ++++-
>> fs/ocfs2/file.c | 6 ++++++
>> fs/pipe.c | 3 ++-
>> fs/read_write.c | 17 +++++++++++------
>> fs/xfs/xfs_file.c | 4 ++++
>> mm/shmem.c | 4 ++++
>> 8 files changed, 39 insertions(+), 8 deletions(-)
>>
>> diff --git a/fs/ceph/file.c b/fs/ceph/file.c
>> index 4776257..b62e3a5 100644
>> --- a/fs/ceph/file.c
>> +++ b/fs/ceph/file.c
>> @@ -808,6 +808,8 @@ again:
>> if ((got & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) == 0 ||
>> (iocb->ki_filp->f_flags & O_DIRECT) ||
>> (fi->flags & CEPH_F_SYNC)) {
>> + if (flags & O_NONBLOCK)
>> + return -EAGAIN;
>
> Again, the right return value for the O_DIRECT case is EINVAL.
>
>> diff --git a/fs/nfs/file.c b/fs/nfs/file.c
>> index 4072f3a..116bed2 100644
>> --- a/fs/nfs/file.c
>> +++ b/fs/nfs/file.c
>> @@ -170,8 +170,11 @@ nfs_file_read(struct kiocb *iocb, struct iov_iter *to, int flags)
>> struct inode *inode = file_inode(iocb->ki_filp);
>> ssize_t result;
>>
>> - if (iocb->ki_filp->f_flags & O_DIRECT)
>> + if (iocb->ki_filp->f_flags & O_DIRECT) {
>> + if (flags & O_NONBLOCK)
>> + return -EAGAIN;
>> return nfs_file_direct_read(iocb, to, iocb->ki_pos, true);
>> + }
>
> And here. I stopped looking for that case at this point.
>
> Cheers,
> Jeff
--
Milosz Tanski
CTO
16 East 34th Street, 15th floor
New York, NY 10016
p: 646-253-9055
e: milosz@xxxxxxxxx
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