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From: Jens Axboe <axboe@kernel.dk>
To: io-uring@vger.kernel.org
Cc: carter.li@eoitek.com
Subject: [PATCHSET 0/2] Ensure all needed read/write data is stable
Date: Mon,  2 Dec 2019 15:30:59 -0700
Message-ID: <20191202223101.10836-1-axboe@kernel.dk> (raw)

Currently we don't copy the associated iovecs when we punt to async
context, and this can prove problematic if the caller only ensures
the iovec is valid for the submission. This is a perfectly valid
assumption, and I think io_uring should make sure that this is safe
to do.

First patch is a prep patch, second patch adds the necessary support
for IORING_OP_READV and IORING_OP_WRITEV to handle this appropriately.
We really need to do the same for the other calls that pass in pointers
to structs, like sendmsg/recvmsg, connect, and accept. I will deal with
those next.

Also see: https://github.com/axboe/liburing/issues/27

-- 
Jens Axboe



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Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-02 22:30 Jens Axboe [this message]
2019-12-02 22:31 ` [PATCH 1/2] io_uring: add general async offload context Jens Axboe
2019-12-02 22:31 ` [PATCH 2/2] io_uring: ensure async punted read/write requests copy iovec Jens Axboe

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