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io_uring: fix timeout cancel return code 

When we cancel a timeout we should emit a sensible return code, like
-ECANCELED but not 0, otherwise it may trick users.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/7b0ad1065e3bd1994722702bd0ba9e7bc9b0683b.1616696997.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2021-03-25 18:32:42 +00:00 committed by Jens Axboe
parent 1e4cf0d3d0
commit 1ee4160c73
1 changed files with 4 additions and 4 deletions
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8
fs/io_uring.c
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@ -1247,7 +1247,7 @@ static void io_queue_async_work(struct io_kiocb *req)
io_queue_linked_timeout(link);
}
static void io_kill_timeout(struct io_kiocb *req)
static void io_kill_timeout(struct io_kiocb *req, int status)
{
struct io_timeout_data *io = req->async_data;
int ret;
@ -1257,7 +1257,7 @@ static void io_kill_timeout(struct io_kiocb *req)
atomic_set(&req->ctx->cq_timeouts,
atomic_read(&req->ctx->cq_timeouts) + 1);
list_del_init(&req->timeout.list);
io_cqring_fill_event(req, 0);
io_cqring_fill_event(req, status);
io_put_req_deferred(req, 1);
}
}
@ -1274,7 +1274,7 @@ static bool io_kill_timeouts(struct io_ring_ctx *ctx, struct task_struct *tsk,
spin_lock_irq(&ctx->completion_lock);
list_for_each_entry_safe(req, tmp, &ctx->timeout_list, timeout.list) {
if (io_match_task(req, tsk, files)) {
io_kill_timeout(req);
io_kill_timeout(req, -ECANCELED);
canceled++;
}
}
@ -1326,7 +1326,7 @@ static void io_flush_timeouts(struct io_ring_ctx *ctx)
break;
list_del_init(&req->timeout.list);
io_kill_timeout(req);
io_kill_timeout(req, 0);
} while (!list_empty(&ctx->timeout_list));
ctx->cq_last_tm_flush = seq;