This is in prep for allwoing NOP to be used in IOPOLL mode. remove_buffers
will consistently return ENOENT if asked to remove buffers from a
nonexistent group, and so this is a suitable replacement. Other opcodes
return -EINVAL in IOPOLL from the prep stage, which has slightly different
behaviour.
Signed-off-by: Dylan Yudaken <dylany@fb.com>
Link: https://lore.kernel.org/r/20220422160132.2891927-8-dylany@fb.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Check that CQEs of a link comes in the order of submission, even when
a link fails early during submission initial prep.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
In case of an error submission won't consume all sqes. This tests that
it will get back to the userspace even if (to_submit == to_wait)
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
It is not possible to install barrier.h and compat.h into the top-level
/usr/include directly since they are likely to conflict with other
software. io_uring.h could be confused with the system's kernel header
file.
Put liburing headers into <liburing/*.h> so there is no chance of
conflicts or confusion.
Existing applications continue to build successfully since the location
of <liburing.h> is unchanged. In-tree examples and tests require
modification because src/liburing.h is moved to src/include/liburing.h.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Just a basic test case that does various forms of linked nops, and
a sample bare bones copy program using linked reads and writes.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Eli Schwartz