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nbd/client: Pass mode through to nbd_send_request

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Once the 64-bit headers extension is enabled, the data layout we send
over the wire for a client request depends on the mode negotiated with
the server.  Rather than adding a parameter to nbd_send_request, we
can add a member to struct NBDRequest, since it already does not
reflect on-wire format.  Some callers initialize it directly; many
others rely on a common initialization point during
nbd_co_send_request().  At this point, there is no semantic change.

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Message-ID: <20230829175826.377251-21-eblake@redhat.com>
This commit is contained in:
Eric Blake 2023-08-29 12:58:29 -05:00
parent ac132d0520
commit 297365b40f
3 changed files with 12 additions and 8 deletions
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12
include/block/nbd.h
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@ -63,17 +63,19 @@ typedef enum NBDMode {
/* TODO add NBD_MODE_EXTENDED */
} NBDMode;
/* Transmission phase structs
*
* Note: these are _NOT_ the same as the network representation of an NBD
* request and reply!
/* Transmission phase structs */
/*
* Note: NBDRequest is _NOT_ the same as the network representation of an NBD
* request!
*/
typedef struct NBDRequest {
uint64_t cookie;
uint64_t from;
uint32_t len;
uint16_t flags; /* NBD_CMD_FLAG_* */
uint16_t type; /* NBD_CMD_* */
uint16_t type; /* NBD_CMD_* */
NBDMode mode; /* Determines which network representation to use */
} NBDRequest;
typedef struct NBDSimpleReply {