nfs: fix size updates for aio writes
nfs_file_direct_write only updates the inode size if it succeeded and returned the number of bytes written. But in the AIO case nfs_direct_wait turns the return value into -EIOCBQUEUED and we skip the size update. Instead the aio completion path should updated it, which this patch does. The implementation is a little hacky because there is no obvious way to find out we are called for a write in nfs_direct_complete. Signed-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NTrond Myklebust <trond.myklebust@primarydata.com>
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