liburing/src/include, branch master

Sync io_uring.h with the kernel

2019-09-06T16:30:27+00:00

This brings in the features flags.

Signed-off-by: Jens Axboe

Fixed address prep helpers should include buf_index

2019-08-30T16:04:44+00:00

io_uring depends on the caller specifying the index into the array
of registered buffers for doing pre-mapped IO. Make this explicit
by requiring the caller to pass in this value for the
io_uring_prep_read_fixed() and io_uring_prep_write_fixed() helpers.

Signed-off-by: Jens Axboe

liburing/barrier.h: Add prefix to arm barriers

2019-08-20T13:46:29+00:00

Rename the newly added arm barriers and READ/WRITE_ONCE
to avoid using popular names.

Signed-off-by: Julia Suvorova 
Signed-off-by: Jens Axboe

liburing/barrier.h: Add prefix io_uring to barriers

2019-08-19T14:45:28+00:00

The names of the barriers conflict with the namespaces of other projects
when trying to directly include liburing.h. Avoid using popular global
names.

Reviewed-by: Stefan Hajnoczi 
Signed-off-by: Julia Suvorova 
Signed-off-by: Jens Axboe

Add arm64 memory barriers support

2019-08-09T03:37:04+00:00

making liburing on arm64 platform failed. let's support it.

root@Kylin:/# cat /etc/os-release
PRETTY_NAME="Debian GNU/Linux buster/sid"

root@Kylin:/# gcc -v
gcc version 8.2.0 (Debian 8.2.0-20)

root@Kylin:~/liburing# make
make[1]: Entering directory '/root/liburing/src'
cc -g -fomit-frame-pointer -O2 -Wall -Iinclude/ -c -o setup.ol setup.c
In file included from include/liburing.h:14,
                 from setup.c:10:
include/liburing.h: In function 'io_uring_cq_advance':
include/liburing/barrier.h:73:2: warning: implicit declaration of function 'smp_mb'; did you mean 'smp_wmb'? [-Wimplicit-function-declaration]
  smp_mb();    \
  ^~~~~~
include/liburing.h:111:3: note: in expansion of macro 'smp_store_release'
   smp_store_release(cq->khead, *cq->khead + nr);
   ^~~~~~~~~~~~~~~~~

Signed-off-by: Jackie Liu 
Signed-off-by: Jens Axboe

src/Makefile: keep private headers in

2019-07-24T15:11:44+00:00

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  so there is no chance of
conflicts or confusion.

Existing applications continue to build successfully since the location
of  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 
Signed-off-by: Jens Axboe