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io_uring: add missing REQ_F_COMP_LOCKED for nested requests

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When we traverse into failing links or timeouts, we need to ensure we
propagate the REQ_F_COMP_LOCKED flag to ensure that we correctly signal
to the completion side that we already hold the completion lock.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2020-08-10 10:54:02 -06:00
parent 7271ef3a93
commit 9b7adba9ea
1 changed files with 3 additions and 0 deletions
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3
fs/io_uring.c
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@ -1609,6 +1609,7 @@ static bool __io_kill_linked_timeout(struct io_kiocb *req)
return false;
list_del_init(&link->link_list);
link->flags |= REQ_F_COMP_LOCKED;
wake_ev = io_link_cancel_timeout(link);
req->flags &= ~REQ_F_LINK_TIMEOUT;
return wake_ev;
@ -1667,6 +1668,7 @@ static void __io_fail_links(struct io_kiocb *req)
trace_io_uring_fail_link(req, link);
io_cqring_fill_event(link, -ECANCELED);
link->flags |= REQ_F_COMP_LOCKED;
__io_double_put_req(link);
req->flags &= ~REQ_F_LINK_TIMEOUT;
}
@ -5071,6 +5073,7 @@ static int io_timeout_cancel(struct io_ring_ctx *ctx, __u64 user_data)
return -EALREADY;
req_set_fail_links(req);
req->flags |= REQ_F_COMP_LOCKED;
io_cqring_fill_event(req, -ECANCELED);
io_put_req(req);
return 0;