diff options
| author | Eric Blake <eblake@redhat.com> | 2023-08-29 12:58:28 -0500 |
|---|---|---|
| committer | Eric Blake <eblake@redhat.com> | 2023-09-22 17:19:27 -0500 |
| commit | ac132d0520c39f48a22e8666810792c5c9dd44b1 (patch) | |
| tree | c77ecc919d0bed4d0877de6df5f71c7fc690c506 /block | |
| parent | 71a5655a35f7beca8ce0d3e2932cc01b84303994 (diff) | |
nbd: Replace bool structured_reply with mode enum
The upcoming patches for 64-bit extensions requires various points in
the protocol to make decisions based on what was negotiated. While we
could easily add a 'bool extended_headers' alongside the existing
'bool structured_reply', this does not scale well if more modes are
added in the future. Better is to expose the mode enum added in the
recent commit bfe04d0a7d out to a wider use in the code base.
Where the code previously checked for structured_reply being set or
clear, it now prefers checking for an inequality; this works because
the nodes are in a continuum of increasing abilities, and allows us to
touch fewer places if we ever insert other modes in the middle of the
enum. There should be no semantic change in this patch.
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-ID: <20230829175826.377251-20-eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Diffstat (limited to 'block')
| -rw-r--r-- | block/nbd.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/block/nbd.c b/block/nbd.c index cc48580df7..676b755d79 100644 --- a/block/nbd.c +++ b/block/nbd.c @@ -463,7 +463,8 @@ static coroutine_fn int nbd_receive_replies(BDRVNBDState *s, uint64_t cookie) nbd_channel_error(s, ret); return ret; } - if (nbd_reply_is_structured(&s->reply) && !s->info.structured_reply) { + if (nbd_reply_is_structured(&s->reply) && + s->info.mode < NBD_MODE_STRUCTURED) { nbd_channel_error(s, -EINVAL); return -EINVAL; } @@ -866,7 +867,7 @@ static coroutine_fn int nbd_co_do_receive_one_chunk( } /* handle structured reply chunk */ - assert(s->info.structured_reply); + assert(s->info.mode >= NBD_MODE_STRUCTURED); chunk = &s->reply.structured; if (chunk->type == NBD_REPLY_TYPE_NONE) { @@ -1070,7 +1071,8 @@ nbd_co_receive_cmdread_reply(BDRVNBDState *s, uint64_t cookie, void *payload = NULL; Error *local_err = NULL; - NBD_FOREACH_REPLY_CHUNK(s, iter, cookie, s->info.structured_reply, + NBD_FOREACH_REPLY_CHUNK(s, iter, cookie, + s->info.mode >= NBD_MODE_STRUCTURED, qiov, &reply, &payload) { int ret; |