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nbd/server: Prepare for per-request filtering of BLOCK_STATUS

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The next commit will add support for the optional extension
NBD_CMD_FLAG_PAYLOAD during NBD_CMD_BLOCK_STATUS, where the client can
request that the server only return a subset of negotiated contexts,
rather than all contexts.  To make that task easier, this patch
populates the list of contexts to return on a per-command basis (for
now, identical to the full set of negotiated contexts).

Signed-off-by: Eric Blake <eblake@redhat.com>
Message-ID: <20230925192229.3186470-25-eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
This commit is contained in:
Eric Blake 2023-09-25 14:22:41 -05:00
parent fd358d8390
commit 1dec4643d1
2 changed files with 18 additions and 5 deletions
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include/block/nbd.h
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@ -77,6 +77,7 @@ typedef struct NBDRequest {
uint16_t flags; /* NBD_CMD_FLAG_* */
uint16_t type; /* NBD_CMD_* */
NBDMode mode; /* Determines which network representation to use */
NBDMetaContexts *contexts; /* Used by NBD_CMD_BLOCK_STATUS */
} NBDRequest;
typedef struct NBDSimpleReply {