io_uring: further remove sqpoll limits on opcodes

There are three types of requests that left disabled for sqpoll, namely
epoll ctx, statx, and resources update. Since SQPOLL task is now closely
mimics a userspace thread, remove the restrictions.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/909b52d70c45636d8d7897582474ea5aab5eed34.1620990306.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 599102cc6dfc23e5340d62dca47c452e4d5d7e5b..29ec5b28c73dcfadd54cd522ee471a1bda0fbe6d 100644 (file)
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -4035,7 +4035,7 @@ static int io_epoll_ctl_prep(struct io_kiocb *req,
 #if defined(CONFIG_EPOLL)
        if (sqe->ioprio || sqe->buf_index)
                return -EINVAL;
-       if (unlikely(req->ctx->flags & (IORING_SETUP_IOPOLL | IORING_SETUP_SQPOLL)))
+       if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL))
                return -EINVAL;
 
        req->epoll.epfd = READ_ONCE(sqe->fd);
@@ -4150,7 +4150,7 @@ static int io_fadvise(struct io_kiocb *req, unsigned int issue_flags)
 
 static int io_statx_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
 {
-       if (unlikely(req->ctx->flags & (IORING_SETUP_IOPOLL | IORING_SETUP_SQPOLL)))
+       if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL))
                return -EINVAL;
        if (sqe->ioprio || sqe->buf_index)
                return -EINVAL;
@@ -5827,8 +5827,6 @@ done:
 static int io_rsrc_update_prep(struct io_kiocb *req,
                                const struct io_uring_sqe *sqe)
 {
-       if (unlikely(req->ctx->flags & IORING_SETUP_SQPOLL))
-               return -EINVAL;
        if (unlikely(req->flags & (REQ_F_FIXED_FILE | REQ_F_BUFFER_SELECT)))
                return -EINVAL;
        if (sqe->ioprio || sqe->rw_flags)