[PATCH 0/3] io_uring: fixes for provided buffer ring

[Dylan Yudaken <dylany@fb.com>]

This fixes two problems in the new provided buffer ring feature. One
is a simple arithmetic bug (I think this came out from a refactor).
The other is due to type differences between head & tail, which causes
it to sometimes reuse an old buffer incorrectly.

Patch 1&2 fix bugs
Patch 3 limits the size of the ring as it's not
possible to address more entries with 16 bit head/tail

I will send test cases for liburing shortly.

One question might be if we should change the type of ring_entries
to uint16_t in struct io_uring_buf_reg?

Dylan Yudaken (3):
  io_uring: fix index calculation
  io_uring: fix types in provided buffer ring
  io_uring: limit size of provided buffer ring

 fs/io_uring.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)


base-commit: f2906aa863381afb0015a9eb7fefad885d4e5a56
-- 
2.30.2