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c1329532d5
Currently cloning a buffer table will fail if the destination already has a table. But it should be possible to use it to replace existing elements. Add a IORING_REGISTER_DST_REPLACE cloning flag, which if set, will allow the destination to already having a buffer table. If that is the case, then entries designated by offset + nr buffers will be replaced if they already exist. Note that it's allowed to use IORING_REGISTER_DST_REPLACE and not have an existing table, in which case it'll work just like not having the flag set and an empty table - it'll just assign the newly created table for that case. Signed-off-by: Jens Axboe <axboe@kernel.dk> |
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