On Fri, Jun 19, 2026 at 12:27:00PM +0530, harshal24-chavan wrote: > Currently, if an application wants to duplicate registered file > descriptors from one io_uring instance to another, it must manually > unregister and re-register them, incurring unnecessary overhead. > > Add IORING_REGISTER_CLONE_FILES to allow direct cloning of the file > table from a source ring to a destination ring. This implementation > strictly mirrors the io_clone_buffers UAPI, supporting partial offsets > and the IORING_REGISTER_DST_REPLACE flag. > > To ensure lock synchronization safety, destination nodes are strictly > allocated as new, private io_rsrc_nodes rather than sharing references > across rings. > > --- > v3: > - Rewrote the cloning loop to allocate private destination nodes via > io_rsrc_node_alloc to fix non-atomic ref lock synchronization (Jens). > - Maintained partial offset/copy support to mirror io_clone_buffers UAPI > (Jens). > - Gated the replacement free check on ctx->file_table.data.nr (Gabriel). > - Prevented self-cloning by checking ctx == src_ctx (Gabriel). > - Removed submitter_task check to allow cross-thread pooling setups > (Gabriel). > v2: Dropped unrelated whitespace formatting changes from v1 > > Signed-off-by: harshal24-chavan <[email protected]>
Needs to be a name, not an email alias, and above the --- line. thanks, greg k-h
