ceph: Implement writev/pwritev for sync operation.
For writev/pwritev sync-operatoin, ceph only do the first iov. I divided the write-sync-operation into two functions. One for direct-write, other for none-direct-sync-write. This is because for none-direct-sync-write we can merge iovs to one. But for direct-write, we can't merge iovs. Signed-off-by:Jianpeng Ma <majianpeng@gmail.com> Reviewed-by:
Yan, Zheng <zheng.z.yan@intel.com> Signed-off-by:
Sage Weil <sage@inktank.com>
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