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nbd/client: Split out nbd_receive_one_meta_context()

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Extract portions of nbd_negotiate_simple_meta_context() to
a new function nbd_receive_one_meta_context() that copies the
pattern of nbd_receive_list() for performing the argument
validation of one reply.  The error message when the server
replies with more than one context changes slightly, but
that shouldn't happen in the common case.

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20190117193658.16413-13-eblake@redhat.com>
This commit is contained in:
Eric Blake 2019-01-17 13:36:49 -06:00
parent 757b3ab989
commit 0182c1aed9
2 changed files with 91 additions and 58 deletions
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2
nbd/trace-events
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@ -13,7 +13,7 @@ nbd_receive_query_exports_success(const char *wantname) "Found desired export na
nbd_receive_starttls_new_client(void) "Setting up TLS"
nbd_receive_starttls_tls_handshake(void) "Starting TLS handshake"
nbd_opt_meta_request(const char *optname, const char *context, const char *export) "Requesting %s %s for export %s"
nbd_opt_meta_reply(const char *context, uint32_t id) "Received mapping of context %s to id %" PRIu32
nbd_opt_meta_reply(const char *optname, const char *context, uint32_t id) "Received %s mapping of %s to id %" PRIu32
nbd_receive_negotiate(void *tlscreds, const char *hostname) "Receiving negotiation tlscreds=%p hostname=%s"
nbd_receive_negotiate_magic(uint64_t magic) "Magic is 0x%" PRIx64
nbd_receive_negotiate_server_flags(uint32_t globalflags) "Global flags are 0x%" PRIx32