io_uring: fill extra big cqe fields from req

The only user of io_req_complete32()-like functions is cmd
requests. Instead of keeping the whole complete32 family, remove them
and provide the extras in already added for inline completions
req->extra{1,2}. When fill_cqe_res() finds CQE32 option enabled
it'll use those fields to fill a 32B cqe.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/af1319eb661b1f9a0abceb51cbbf72b8002e019d.1655287457.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 eb858cf..10901db 100644 (file)
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -2513,33 +2513,6 @@ static inline bool __io_fill_cqe_req(struct io_ring_ctx *ctx,
        }
 }
 
-static inline bool __io_fill_cqe32_req(struct io_ring_ctx *ctx,
-                                      struct io_kiocb *req)
-{
-       struct io_uring_cqe *cqe;
-       u64 extra1 = req->extra1;
-       u64 extra2 = req->extra2;
-
-       trace_io_uring_complete(req->ctx, req, req->cqe.user_data,
-                               req->cqe.res, req->cqe.flags, extra1, extra2);
-
-       /*
-        * If we can't get a cq entry, userspace overflowed the
-        * submission (by quite a lot). Increment the overflow count in
-        * the ring.
-        */
-       cqe = io_get_cqe(ctx);
-       if (likely(cqe)) {
-               memcpy(cqe, &req->cqe, sizeof(struct io_uring_cqe));
-               cqe->big_cqe[0] = extra1;
-               cqe->big_cqe[1] = extra2;
-               return true;
-       }
-
-       return io_cqring_event_overflow(ctx, req->cqe.user_data, req->cqe.res,
-                                       req->cqe.flags, extra1, extra2);
-}
-
 static noinline bool io_fill_cqe_aux(struct io_ring_ctx *ctx, u64 user_data,
                                     s32 res, u32 cflags)
 {
@@ -2590,19 +2563,6 @@ static void __io_req_complete_post(struct io_kiocb *req, s32 res,
        __io_req_complete_put(req);
 }
 
-static void __io_req_complete_post32(struct io_kiocb *req, s32 res,
-                                  u32 cflags, u64 extra1, u64 extra2)
-{
-       if (!(req->flags & REQ_F_CQE_SKIP)) {
-               req->cqe.res = res;
-               req->cqe.flags = cflags;
-               req->extra1 = extra1;
-               req->extra2 = extra2;
-               __io_fill_cqe32_req(req->ctx, req);
-       }
-       __io_req_complete_put(req);
-}
-
 static void io_req_complete_post(struct io_kiocb *req, s32 res, u32 cflags)
 {
        struct io_ring_ctx *ctx = req->ctx;
@@ -2614,18 +2574,6 @@ static void io_req_complete_post(struct io_kiocb *req, s32 res, u32 cflags)
        io_cqring_ev_posted(ctx);
 }
 
-static void io_req_complete_post32(struct io_kiocb *req, s32 res,
-                                  u32 cflags, u64 extra1, u64 extra2)
-{
-       struct io_ring_ctx *ctx = req->ctx;
-
-       spin_lock(&ctx->completion_lock);
-       __io_req_complete_post32(req, res, cflags, extra1, extra2);
-       io_commit_cqring(ctx);
-       spin_unlock(&ctx->completion_lock);
-       io_cqring_ev_posted(ctx);
-}
-
 static inline void io_req_complete_state(struct io_kiocb *req, s32 res,
                                         u32 cflags)
 {
@@ -2643,19 +2591,6 @@ static inline void __io_req_complete(struct io_kiocb *req, unsigned issue_flags,
                io_req_complete_post(req, res, cflags);
 }
 
-static inline void __io_req_complete32(struct io_kiocb *req,
-                                      unsigned int issue_flags, s32 res,
-                                      u32 cflags, u64 extra1, u64 extra2)
-{
-       if (issue_flags & IO_URING_F_COMPLETE_DEFER) {
-               io_req_complete_state(req, res, cflags);
-               req->extra1 = extra1;
-               req->extra2 = extra2;
-       } else {
-               io_req_complete_post32(req, res, cflags, extra1, extra2);
-       }
-}
-
 static inline void io_req_complete(struct io_kiocb *req, s32 res)
 {
        if (res < 0)
@@ -5079,6 +5014,13 @@ void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd,
 }
 EXPORT_SYMBOL_GPL(io_uring_cmd_complete_in_task);
 
+static inline void io_req_set_cqe32_extra(struct io_kiocb *req,
+                                         u64 extra1, u64 extra2)
+{
+       req->extra1 = extra1;
+       req->extra2 = extra2;
+}
+
 /*
  * Called by consumers of io_uring_cmd, if they originally returned
  * -EIOCBQUEUED upon receiving the command.
@@ -5089,10 +5031,10 @@ void io_uring_cmd_done(struct io_uring_cmd *ioucmd, ssize_t ret, ssize_t res2)
 
        if (ret < 0)
                req_set_fail(req);
+
        if (req->ctx->flags & IORING_SETUP_CQE32)
-               __io_req_complete32(req, 0, ret, 0, res2, 0);
-       else
-               io_req_complete(req, ret);
+               io_req_set_cqe32_extra(req, res2, 0);
+       io_req_complete(req, ret);
 }
 EXPORT_SYMBOL_GPL(io_uring_cmd_done);