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block/export: Add blk_exp_close_all(_type)

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This adds a function to shut down all block exports, and another one to
shut down the block exports of a single type. The latter is used for now
when stopping the NBD server. As soon as we implement support for
multiple NBD servers, we'll need a per-server list of exports and it
will be replaced by a function using that.

As a side effect, the BlockExport layer has a list tracking all existing
exports now. closed_exports loses its only user and can go away.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200924152717.287415-18-kwolf@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2020-09-24 17:27:03 +02:00
parent a6ff798966
commit bc4ee65b8c
7 changed files with 107 additions and 36 deletions
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2
block.c
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@ -4462,7 +4462,7 @@ static void bdrv_close(BlockDriverState *bs)
void bdrv_close_all(void)
{
assert(job_next(NULL) == NULL);
nbd_export_close_all();
blk_exp_close_all();
/* Drop references from requests still in flight, such as canceled block
* jobs whose AIO context has not been polled yet */