On Tue, Oct 12, 2021 at 04:48:43AM -0400, Emanuele Giuseppe Esposito wrote: > block.h currently contains a mix of functions: > some of them run under the BQL and modify the block layer graph, > others are instead thread-safe and perform I/O in iothreads. > It is not easy to understand which function is part of which > group (I/O vs GS), and this patch aims to clarify it. > > The "GS" functions need the BQL, and often use > aio_context_acquire/release and/or drain to be sure they > can modify the graph safely. > The I/O function are instead thread safe, and can run in > any AioContext. > > By splitting the header in two files, block-io.h > and block-global-state.h we have a clearer view on what > needs what kind of protection. block-common.h > instead contains common structures shared by both headers. > > block.h is left there for legacy and to avoid changing > all includes in all c files that use the block APIs. > > Assertions are added in the next patch. > > Signed-off-by: Emanuele Giuseppe Esposito <eespo...@redhat.com> > --- > block.c | 3 + > block/meson.build | 7 +- > include/block/block-common.h | 389 +++++++++++++ > include/block/block-global-state.h | 263 +++++++++ > include/block/block-io.h | 283 ++++++++++ > include/block/block.h | 863 +---------------------------- > 6 files changed, 947 insertions(+), 861 deletions(-) > create mode 100644 include/block/block-common.h > create mode 100644 include/block/block-global-state.h > create mode 100644 include/block/block-io.h
Modulo Eric's comments: Reviewed-by: Stefan Hajnoczi <stefa...@redhat.com>
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