[PATCHSET 0/4] Allow allocated direct descriptors

[Jens Axboe <axboe@kernel.dk>]

Hi,

Currently using direct descriptors with open or accept requires the
application to manage the descriptor space, picking which slot to use
for any given file. However, there are cases where it's useful to just
get a direct descriptor and not care about which value it is, instead
just return it like a normal open or accept would.

This will also be useful for multishot accept support, where allocated
direct descriptors are a requirement to make that feature work with
these kinds of files.

This adds support for allocating a new fixed descriptor. This is chosen
by passing in UINT_MAX as the fixed slot, which otherwise has a limit
of INT_MAX like any file descriptor does.

 fs/io_uring.c | 100 +++++++++++++++++++++++++++++++++++++++++++++++---
  1 file changed, 94 insertions(+), 6 deletions(-)

-- 
Jens Axboe