diff options
Diffstat (limited to 'io_uring/msg_ring.c')
| -rw-r--r-- | io_uring/msg_ring.c | 34 |
1 files changed, 27 insertions, 7 deletions
diff --git a/io_uring/msg_ring.c b/io_uring/msg_ring.c index 3ff9098573db..3067c9343991 100644 --- a/io_uring/msg_ring.c +++ b/io_uring/msg_ring.c @@ -93,19 +93,38 @@ static void io_msg_remote_post(struct io_ring_ctx *ctx, struct io_kiocb *req, io_req_task_work_add_remote(req, IOU_F_TWQ_LAZY_WAKE); } +static int io_msg_ring_cqe_flags(struct io_ring_ctx *target_ctx, + const struct io_msg *msg, u32 *flags) +{ + *flags = 0; + + if (!(msg->flags & IORING_MSG_RING_FLAGS_PASS)) + return 0; + + *flags = msg->cqe_flags; + if ((*flags & IORING_CQE_F_32) && + !(target_ctx->flags & (IORING_SETUP_CQE32 | + IORING_SETUP_CQE_MIXED))) + return -EINVAL; + + return 0; +} + static int io_msg_data_remote(struct io_ring_ctx *target_ctx, struct io_msg *msg) { struct io_kiocb *target; - u32 flags = 0; + u32 flags; + int ret; - target = kmem_cache_alloc(req_cachep, GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO) ; + ret = io_msg_ring_cqe_flags(target_ctx, msg, &flags); + if (ret) + return ret; + + target = kmem_cache_alloc(req_cachep, GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO); if (unlikely(!target)) return -ENOMEM; - if (msg->flags & IORING_MSG_RING_FLAGS_PASS) - flags = msg->cqe_flags; - io_msg_remote_post(target_ctx, target, msg->len, flags, msg->user_data); return 0; } @@ -130,8 +149,9 @@ static int __io_msg_ring_data(struct io_ring_ctx *target_ctx, if (io_msg_need_remote(target_ctx)) return io_msg_data_remote(target_ctx, msg); - if (msg->flags & IORING_MSG_RING_FLAGS_PASS) - flags = msg->cqe_flags; + ret = io_msg_ring_cqe_flags(target_ctx, msg, &flags); + if (ret) + return ret; ret = -EOVERFLOW; if (target_ctx->flags & IORING_SETUP_IOPOLL) { |