This series makes it possible for purecap apps to use the io_uring system.
With these patches, all io_uring LTP tests pass in both Purecap and compat modes. Note that the LTP tests only address the basic functionality of the io_uring system and a significant portion of the multiplexed functionality is untested in LTP.
I have started running and investigating liburing tests and examples, so this is not a final version, but review is still very much appreciated while I go through the liburing tests.
v2: - Rebase on top of release 6.1 - Remove VM_READ_CAPS/VM_LOAD_CAPS patches as they are already merged - Update commit message in PATCH 1 - Add the generic changes PATCH 2 and PATCH 3 to avoid copying user pointers from/to userspace unnecesarily. These could be upstreamable. - Split "pulling the cqes memeber out" change into PATCH 4 - The changes for PATCH 5 and 6 are now split into their respective files after the rebase. - Format and change organization based on the feedback on the previous version, including creating helpers copy_*_from_* for various uAPI structs - Add comments related to handling of setup flags IORING_SETUP_SQE128 and IORING_SETUP_CQE32 - Add handling for new uAPI structs: io_uring_buf, io_uring_buf_ring, io_uring_buf_reg, io_uring_sync_cancel_reg.
Gitlab issue: https://git.morello-project.org/morello/kernel/linux/-/issues/2
Review branch: https://git.morello-project.org/tudcre01/linux/-/commits/morello/io_uring_v2
Tudor Cretu (7): compiler_types: Add (u)intcap_t to native_words io_uring/rw : Restrict copy to only uiov->len from userspace io_uring/tctx: Copy only the offset field back to user io_uring: Pull cqes member out from rings struct io_uring: Implement compat versions of uAPI structs and handle them io_uring: Use user pointer type in the uAPI structs io_uring: Allow capability tag access on the shared memory
include/linux/compiler_types.h | 7 + include/linux/io_uring_types.h | 160 ++++++++++++++-- include/uapi/linux/io_uring.h | 62 ++++--- io_uring/advise.c | 2 +- io_uring/cancel.c | 40 +++- io_uring/cancel.h | 2 +- io_uring/epoll.c | 2 +- io_uring/fdinfo.c | 64 ++++++- io_uring/fs.c | 16 +- io_uring/io_uring.c | 329 +++++++++++++++++++++++++-------- io_uring/io_uring.h | 126 ++++++++++--- io_uring/kbuf.c | 119 ++++++++++-- io_uring/kbuf.h | 8 +- io_uring/msg_ring.c | 4 +- io_uring/net.c | 18 +- io_uring/openclose.c | 4 +- io_uring/poll.c | 4 +- io_uring/rsrc.c | 150 ++++++++++++--- io_uring/rw.c | 17 +- io_uring/statx.c | 4 +- io_uring/tctx.c | 57 +++++- io_uring/timeout.c | 10 +- io_uring/uring_cmd.c | 5 + io_uring/uring_cmd.h | 7 + io_uring/xattr.c | 12 +- 25 files changed, 977 insertions(+), 252 deletions(-)