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io_uring: add allow_overflow to io_post_aux_cqe

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Some use cases of io_post_aux_cqe would not want to overflow as is, but
might want to change the flags/result. For example multishot receive
requires in order CQE, and so if there is an overflow it would need to
stop receiving until the overflow is taken care of.

Signed-off-by: Dylan Yudaken <dylany@fb.com>
Link: https://lore.kernel.org/r/20220630091231.1456789-8-dylany@fb.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Dylan Yudaken
2022-06-30 02:12:26 -07:00
committed by Jens Axboe
parent 114eccdf0e
commit 52120f0fad
6 changed files with 18 additions and 11 deletions
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4
io_uring/msg_ring.c
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@@ -31,7 +31,7 @@ static int io_msg_ring_data(struct io_kiocb *req)
if (msg->src_fd || msg->dst_fd || msg->flags)
return -EINVAL;
if (io_post_aux_cqe(target_ctx, msg->user_data, msg->len, 0))
if (io_post_aux_cqe(target_ctx, msg->user_data, msg->len, 0, true))
return 0;
return -EOVERFLOW;
@@ -113,7 +113,7 @@ static int io_msg_send_fd(struct io_kiocb *req, unsigned int issue_flags)
* completes with -EOVERFLOW, then the sender must ensure that a
* later IORING_OP_MSG_RING delivers the message.
*/
if (!io_post_aux_cqe(target_ctx, msg->user_data, msg->len, 0))
if (!io_post_aux_cqe(target_ctx, msg->user_data, msg->len, 0, true))
ret = -EOVERFLOW;
out_unlock:
io_double_unlock_ctx(ctx, target_ctx, issue_flags);