block: move block exports to libblockdev
commitcbc20bfb8fc293333abbef6aacf052f5f8d72f98
authorStefan Hajnoczi <stefanha@redhat.com>
Tue, 29 Sep 2020 12:55:15 +0000 (29 13:55 +0100)
committerStefan Hajnoczi <stefanha@redhat.com>
Fri, 23 Oct 2020 12:42:16 +0000 (23 13:42 +0100)
tree45821c5f9e4fcf2ae34979ee9a22aca44f67f614
parent4fb9071f65aa871bb46d665899ee328a94d9f781
block: move block exports to libblockdev

Block exports are used by softmmu, qemu-storage-daemon, and qemu-nbd.
They are not used by other programs and are not otherwise needed in
libblock.

Undo the recent move of blockdev-nbd.c from blockdev_ss into block_ss.
Since bdrv_close_all() (libblock) calls blk_exp_close_all()
(libblockdev) a stub function is required..

Make qemu-nbd.c use signal handling utility functions instead of
duplicating the code. This helps because os-posix.c is in libblockdev
and it depends on a qemu_system_killed() symbol that qemu-nbd.c lacks.
Once we use the signal handling utility functions we also end up
providing the necessary symbol.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 20200929125516.186715-4-stefanha@redhat.com
[Fixed s/ndb/nbd/ typo in commit description as suggested by Eric Blake
--Stefan]
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
block/export/meson.build
meson.build
nbd/meson.build
qemu-nbd.c
stubs/blk-exp-close-all.c [new file with mode: 0644]
stubs/meson.build