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block/export: Add 'id' option to block-export-add

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We'll need an id to identify block exports in monitor commands. This
adds one.

Note that this is different from the 'name' option in the NBD server,
which is the externally visible export name. While block export ids need
to be unique in the whole process, export names must be unique only for
the same server. Different export types or (potentially in the future)
multiple NBD servers can have the same export name externally, but still
need different block export ids internally.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200924152717.287415-19-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 17:27:04 +02:00
parent bc4ee65b8c
commit d53be9ce55
7 changed files with 39 additions and 3 deletions
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3
include/block/export.h
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@ -50,6 +50,9 @@ typedef struct BlockExportDriver {
struct BlockExport {
const BlockExportDriver *drv;
/* Unique identifier for the export */
char *id;
/*
* Reference count for this block export. This includes strong references
* both from the owner (qemu-nbd or the monitor) and clients connected to