[liburing,0/4] Buffer ring API fixes

Message

Dylan Yudaken June 13, 2022, 1:12 p.m. UTC

This set makes some changes to the new buf_ring API to help it's
usability.  Most importantly the _add function needs a mask parameter
to prevent buffer overflow. I added a _mask helper function to
calculate this. Even though its trivial it feels better to not force
the user to think about it.

Additionally _init is required as otherwise there is no provided way
to sync the tail with the kernel.

Lastly I add a test that showed up some issues found in 5.19-rc1.

Patch 1 is a small man fix
Patch 2/3 are the API changes
Patch 4 is the test.

Dylan Yudaken (4):
  remove non-existent manpage reference
  add mask parameter to io_uring_buf_ring_add
  add io_uring_buf_ring_init
  buf-ring: add tests that cycle through the provided buffer ring

 man/io_uring_buf_ring_add.3      |   5 ++
 man/io_uring_buf_ring_init.3     |  30 +++++++
 man/io_uring_buf_ring_mask.3     |  27 +++++++
 man/io_uring_register_buf_ring.3 |   6 +-
 src/include/liburing.h           |  18 ++++-
 test/buf-ring.c                  | 133 +++++++++++++++++++++++++++++++
 test/send_recvmsg.c              |   4 +-
 7 files changed, 218 insertions(+), 5 deletions(-)
 create mode 100644 man/io_uring_buf_ring_init.3
 create mode 100644 man/io_uring_buf_ring_mask.3


base-commit: 807c8169e153a3985f1a4deddc302846673ef979