diff options
| -rw-r--r-- | io_uring/msg_ring.c | 47 |
1 files changed, 23 insertions, 24 deletions
diff --git a/io_uring/msg_ring.c b/io_uring/msg_ring.c index 2d3cd945a531..321f5eafef99 100644 --- a/io_uring/msg_ring.c +++ b/io_uring/msg_ring.c @@ -25,6 +25,28 @@ struct io_msg { u32 flags; }; +static void io_double_unlock_ctx(struct io_ring_ctx *octx) +{ + mutex_unlock(&octx->uring_lock); +} + +static int io_double_lock_ctx(struct io_ring_ctx *octx, + unsigned int issue_flags) +{ + /* + * To ensure proper ordering between the two ctxs, we can only + * attempt a trylock on the target. If that fails and we already have + * the source ctx lock, punt to io-wq. + */ + if (!(issue_flags & IO_URING_F_UNLOCKED)) { + if (!mutex_trylock(&octx->uring_lock)) + return -EAGAIN; + return 0; + } + mutex_lock(&octx->uring_lock); + return 0; +} + void io_msg_ring_cleanup(struct io_kiocb *req) { struct io_msg *msg = io_kiocb_to_cmd(req, struct io_msg); @@ -77,29 +99,6 @@ static int io_msg_ring_data(struct io_kiocb *req) return -EOVERFLOW; } -static void io_double_unlock_ctx(struct io_ring_ctx *octx, - unsigned int issue_flags) -{ - mutex_unlock(&octx->uring_lock); -} - -static int io_double_lock_ctx(struct io_ring_ctx *octx, - unsigned int issue_flags) -{ - /* - * To ensure proper ordering between the two ctxs, we can only - * attempt a trylock on the target. If that fails and we already have - * the source ctx lock, punt to io-wq. - */ - if (!(issue_flags & IO_URING_F_UNLOCKED)) { - if (!mutex_trylock(&octx->uring_lock)) - return -EAGAIN; - return 0; - } - mutex_lock(&octx->uring_lock); - return 0; -} - static struct file *io_msg_grab_file(struct io_kiocb *req, unsigned int issue_flags) { struct io_msg *msg = io_kiocb_to_cmd(req, struct io_msg); @@ -148,7 +147,7 @@ static int io_msg_install_complete(struct io_kiocb *req, unsigned int issue_flag if (!io_post_aux_cqe(target_ctx, msg->user_data, msg->len, 0)) ret = -EOVERFLOW; out_unlock: - io_double_unlock_ctx(target_ctx, issue_flags); + io_double_unlock_ctx(target_ctx); return ret; } |