diff options
| author | Pavel Begunkov <asml.silence@gmail.com> | 2023-08-25 00:53:25 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-08-25 01:16:19 +0200 |
| commit | b24c5d752962fa0970cd7e3d74b1cd0e843358de (patch) | |
| tree | 74ca977b70dc9e2440ecbccf52c3a19c3deaf7f9 /io_uring | |
| parent | io_uring: cqe init hardening (diff) | |
| download | linux-b24c5d752962fa0970cd7e3d74b1cd0e843358de.tar.xz linux-b24c5d752962fa0970cd7e3d74b1cd0e843358de.zip | |
io_uring: simplify big_cqe handling
Don't keep big_cqe bits of req in a union with hash_node, find a
separate space for it. It's bit safer, but also if we keep it always
initialised, we can get rid of ugly REQ_F_CQE32_INIT handling.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/447aa1b2968978c99e655ba88db536e903df0fe9.1692916914.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring')
| -rw-r--r-- | io_uring/io_uring.c | 8 | ||||
| -rw-r--r-- | io_uring/io_uring.h | 15 | ||||
| -rw-r--r-- | io_uring/uring_cmd.c | 5 |
3 files changed, 8 insertions, 20 deletions
diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c index 3e0fe1ebbc10..0aeb33256a6d 100644 --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -807,13 +807,10 @@ static bool io_cqring_event_overflow(struct io_ring_ctx *ctx, u64 user_data, void io_req_cqe_overflow(struct io_kiocb *req) { - if (!(req->flags & REQ_F_CQE32_INIT)) { - req->extra1 = 0; - req->extra2 = 0; - } io_cqring_event_overflow(req->ctx, req->cqe.user_data, req->cqe.res, req->cqe.flags, - req->extra1, req->extra2); + req->big_cqe.extra1, req->big_cqe.extra2); + memset(&req->big_cqe, 0, sizeof(req->big_cqe)); } /* @@ -1057,6 +1054,7 @@ static void io_preinit_req(struct io_kiocb *req, struct io_ring_ctx *ctx) req->async_data = NULL; /* not necessary, but safer to zero */ memset(&req->cqe, 0, sizeof(req->cqe)); + memset(&req->big_cqe, 0, sizeof(req->big_cqe)); } static void io_flush_cached_locked_reqs(struct io_ring_ctx *ctx, diff --git a/io_uring/io_uring.h b/io_uring/io_uring.h index 465598223386..9b5dfb6ef484 100644 --- a/io_uring/io_uring.h +++ b/io_uring/io_uring.h @@ -148,21 +148,12 @@ static inline bool io_fill_cqe_req(struct io_ring_ctx *ctx, struct io_kiocb *req if (trace_io_uring_complete_enabled()) trace_io_uring_complete(req->ctx, req, req->cqe.user_data, req->cqe.res, req->cqe.flags, - (req->flags & REQ_F_CQE32_INIT) ? req->extra1 : 0, - (req->flags & REQ_F_CQE32_INIT) ? req->extra2 : 0); + req->big_cqe.extra1, req->big_cqe.extra2); memcpy(cqe, &req->cqe, sizeof(*cqe)); - if (ctx->flags & IORING_SETUP_CQE32) { - u64 extra1 = 0, extra2 = 0; - - if (req->flags & REQ_F_CQE32_INIT) { - extra1 = req->extra1; - extra2 = req->extra2; - } - - WRITE_ONCE(cqe->big_cqe[0], extra1); - WRITE_ONCE(cqe->big_cqe[1], extra2); + memcpy(cqe->big_cqe, &req->big_cqe, sizeof(*cqe)); + memset(&req->big_cqe, 0, sizeof(req->big_cqe)); } return true; } diff --git a/io_uring/uring_cmd.c b/io_uring/uring_cmd.c index 8e7a03c1b20e..537795fddc87 100644 --- a/io_uring/uring_cmd.c +++ b/io_uring/uring_cmd.c @@ -43,9 +43,8 @@ EXPORT_SYMBOL_GPL(io_uring_cmd_do_in_task_lazy); static inline void io_req_set_cqe32_extra(struct io_kiocb *req, u64 extra1, u64 extra2) { - req->extra1 = extra1; - req->extra2 = extra2; - req->flags |= REQ_F_CQE32_INIT; + req->big_cqe.extra1 = extra1; + req->big_cqe.extra2 = extra2; } /* |