diff options
| author | Jens Axboe <axboe@kernel.dk> | 2022-03-10 12:59:35 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-03-10 13:05:25 -0700 |
| commit | bcbb7bf6ccde7cb969a5642879832bc84ebf06a3 (patch) | |
| tree | 18a39891555fe3acd6b4197fd097f10745777b4b /fs | |
| parent | b1c62645758eb438179e3a0769168cb7b0a94d6b (diff) | |
| download | linux-bcbb7bf6ccde7cb969a5642879832bc84ebf06a3.tar.bz2 | |
io_uring: allow submissions to continue on error
By default, io_uring will stop submitting a batch of requests if we run
into an error submitting a request. This isn't strictly necessary, as
the error result is passed out-of-band via a CQE anyway. And it can be
a bit confusing for some applications.
Provide a way to setup a ring that will continue submitting on error,
when the error CQE has been posted.
There's still one case that will break out of submission. If we fail
allocating a request, then we'll still return -ENOMEM. We could in theory
post a CQE for that condition too even if we never got a request. Leave
that for a potential followup.
Reported-by: Dylan Yudaken <dylany@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/io_uring.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c index 3145c9cacee0..229b31d644ef 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -7801,8 +7801,14 @@ static int io_submit_sqes(struct io_ring_ctx *ctx, unsigned int nr) } /* will complete beyond this point, count as submitted */ submitted++; - if (io_submit_sqe(ctx, req, sqe)) - break; + if (io_submit_sqe(ctx, req, sqe)) { + /* + * Continue submitting even for sqe failure if the + * ring was setup with IORING_SETUP_SUBMIT_ALL + */ + if (!(ctx->flags & IORING_SETUP_SUBMIT_ALL)) + break; + } } while (submitted < nr); if (unlikely(submitted != nr)) { @@ -11265,7 +11271,7 @@ static long io_uring_setup(u32 entries, struct io_uring_params __user *params) if (p.flags & ~(IORING_SETUP_IOPOLL | IORING_SETUP_SQPOLL | IORING_SETUP_SQ_AFF | IORING_SETUP_CQSIZE | IORING_SETUP_CLAMP | IORING_SETUP_ATTACH_WQ | - IORING_SETUP_R_DISABLED)) + IORING_SETUP_R_DISABLED | IORING_SETUP_SUBMIT_ALL)) return -EINVAL; return io_uring_create(entries, &p, params); |