diff options
Diffstat (limited to 'fs/io_uring.c')
| -rw-r--r-- | fs/io_uring.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c index 6d4e20d59729..5a826017ebb8 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -481,6 +481,7 @@ enum { REQ_F_TIMEOUT_NOSEQ_BIT, REQ_F_COMP_LOCKED_BIT, REQ_F_NEED_CLEANUP_BIT, + REQ_F_OVERFLOW_BIT, }; enum { @@ -521,6 +522,8 @@ enum { REQ_F_COMP_LOCKED = BIT(REQ_F_COMP_LOCKED_BIT), /* needs cleanup */ REQ_F_NEED_CLEANUP = BIT(REQ_F_NEED_CLEANUP_BIT), + /* in overflow list */ + REQ_F_OVERFLOW = BIT(REQ_F_OVERFLOW_BIT), }; /* @@ -1103,6 +1106,7 @@ static bool io_cqring_overflow_flush(struct io_ring_ctx *ctx, bool force) req = list_first_entry(&ctx->cq_overflow_list, struct io_kiocb, list); list_move(&req->list, &list); + req->flags &= ~REQ_F_OVERFLOW; if (cqe) { WRITE_ONCE(cqe->user_data, req->user_data); WRITE_ONCE(cqe->res, req->result); @@ -1155,6 +1159,7 @@ static void io_cqring_fill_event(struct io_kiocb *req, long res) set_bit(0, &ctx->sq_check_overflow); set_bit(0, &ctx->cq_check_overflow); } + req->flags |= REQ_F_OVERFLOW; refcount_inc(&req->refs); req->result = res; list_add_tail(&req->list, &ctx->cq_overflow_list); @@ -6463,6 +6468,29 @@ static void io_uring_cancel_files(struct io_ring_ctx *ctx, if (!cancel_req) break; + if (cancel_req->flags & REQ_F_OVERFLOW) { + spin_lock_irq(&ctx->completion_lock); + list_del(&cancel_req->list); + cancel_req->flags &= ~REQ_F_OVERFLOW; + if (list_empty(&ctx->cq_overflow_list)) { + clear_bit(0, &ctx->sq_check_overflow); + clear_bit(0, &ctx->cq_check_overflow); + } + spin_unlock_irq(&ctx->completion_lock); + + WRITE_ONCE(ctx->rings->cq_overflow, + atomic_inc_return(&ctx->cached_cq_overflow)); + + /* + * Put inflight ref and overflow ref. If that's + * all we had, then we're done with this request. + */ + if (refcount_sub_and_test(2, &cancel_req->refs)) { + io_put_req(cancel_req); + continue; + } + } + io_wq_cancel_work(ctx->io_wq, &cancel_req->work); io_put_req(cancel_req); schedule(); |