This series adds support to liburing for the IORING_SETUP_DEFER_TASKRUN flag. This flag needs a couple of new API calls to force a call to get events for users that are polling the io_uring fd (or a registered eventfd). The second half of the series is a bit mixed and includes some documentation fixes, overflow cleanups and test cleanups. I sent these a couple of months ago and forgot about it, but now it does depend on the new API so it needs to be ordered. I can send it separately if you like. Patches: 1 copies the definition from the kernel include file 2 introduces new APIs required for this feature 3/4/5 add tests for IORING_SETUP_DEFER_TASKRUN 6/7/8 clean and update existing documentation to match upstream 9 exposes the overflow state to the application 10 uses this and tests overflow functionality 11 gives an explicit warning if there is a short read in file-verify Changes since v2: - Add documentation and .map file for new API - remove shutdown test Changes since v1: - update tests to require IORING_SETUP_SINGLE_ISSUER - add docs for IORING_SETUP_DEFER_TASKRUN - add shutdown test Dylan Yudaken (11): Copy defer task run definition from kernel Add documentation for IORING_SETUP_DEFER_TASKRUN flag add io_uring_submit_and_get_events and io_uring_get_events add a t_probe_defer_taskrun helper function for tests update existing tests for defer taskrun add a defer-taskrun test update io_uring_enter.2 docs for IORING_FEAT_NODROP add docs for overflow lost errors expose CQ ring overflow state overflow: add tests file-verify test: log if short read man/io_uring_cq_has_overflow.3 | 25 ++ man/io_uring_enter.2 | 24 +- man/io_uring_get_events.3 | 33 +++ man/io_uring_setup.2 | 30 ++- man/io_uring_submit_and_get_events.3 | 31 +++ src/include/liburing.h | 12 + src/include/liburing/io_uring.h | 7 + src/liburing.map | 2 + src/queue.c | 26 ++- test/Makefile | 1 + test/cq-overflow.c | 243 ++++++++++++++++++- test/defer-taskrun.c | 333 +++++++++++++++++++++++++++ test/eventfd-disable.c | 33 ++- test/file-verify.c | 4 + test/helpers.c | 17 +- test/helpers.h | 2 + test/iopoll.c | 17 +- test/multicqes_drain.c | 50 +++- test/poll-mshot-overflow.c | 40 +++- test/recv-multishot.c | 33 ++- test/rsrc_tags.c | 10 +- 21 files changed, 922 insertions(+), 51 deletions(-) create mode 100644 man/io_uring_cq_has_overflow.3 create mode 100644 man/io_uring_get_events.3 create mode 100644 man/io_uring_submit_and_get_events.3 create mode 100644 test/defer-taskrun.c base-commit: 3bd7d6b27e6b7d7950bba1491bc9c385378fe4dd -- 2.30.2
