qemu/nbd
Kevin Wolf 3859ad36f0 block/export: Move strong user reference to block_exports
The reference owned by the user/monitor that is created when adding the
export and dropped when removing it was tied to the 'exports' list in
nbd/server.c. Every block export will have a user reference, so move it
to the block export level and tie it to the 'block_exports' list in
block/export/export.c instead. This is necessary for introducing a QMP
command for removing exports.

Note that exports are present in block_exports even after the user has
requested shutdown. This is different from NBD's exports where exports
are immediately removed on a shutdown request, even if they are still in
the process of shutting down. In order to avoid that the user still
interacts with an export that is shutting down (and possibly removes it
a second time), we need to remember if the user actually still owns it.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200924152717.287415-20-kwolf@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2020-10-02 15:46:40 +02:00
..
client.c nbd: Use ERRP_GUARD() 2020-07-10 15:18:09 +02:00
common.c nbd: Prepare for NBD_CMD_FLAG_FAST_ZERO 2019-09-05 16:03:13 -05:00
meson.build meson: convert block 2020-08-21 06:30:18 -04:00
nbd-internal.h Include qemu/main-loop.h less 2019-08-16 13:31:52 +02:00
server.c block/export: Move strong user reference to block_exports 2020-10-02 15:46:40 +02:00
trace-events trace: Remove trailing newline in events 2019-09-18 10:19:47 +01:00
trace.h trace: switch position of headers to what Meson requires 2020-08-21 06:18:24 -04:00