The next patch wants to adjust whether the NBD server code advertises
MULTI_CONN based on whether it is known if the server limits to
exactly one client. For a server started by QMP, this information is
obtained through nbd_server_start (which can support more than one
export); but for qemu-nbd (which supports exactly one export), it is
controlled only by the command-line option -e/--shared. Since we
already have a hook function used by qemu-nbd, it's easiest to just
alter its signature to fit our needs.
Signed-off-by: Eric Blake <ebl...@redhat.com>
---
include/block/nbd.h | 2 +-
blockdev-nbd.c | 8 ++++----
qemu-nbd.c | 2 +-
3 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/include/block/nbd.h b/include/block/nbd.h
index a98eb665da04..c5a29ce1c61b 100644
--- a/include/block/nbd.h
+++ b/include/block/nbd.h
@@ -344,7 +344,7 @@ void nbd_client_new(QIOChannelSocket *sioc,
void nbd_client_get(NBDClient *client);
void nbd_client_put(NBDClient *client);
-void nbd_server_is_qemu_nbd(bool value);
+void nbd_server_is_qemu_nbd(int max_connections);
bool nbd_server_is_running(void);
void nbd_server_start(SocketAddress *addr, const char *tls_creds,
const char *tls_authz, uint32_t max_connections,
diff --git a/blockdev-nbd.c b/blockdev-nbd.c
index 9840d25a8298..add41a23af43 100644
--- a/blockdev-nbd.c
+++ b/blockdev-nbd.c
@@ -30,18 +30,18 @@ typedef struct NBDServerData {
} NBDServerData;
static NBDServerData *nbd_server;
-static bool is_qemu_nbd;
+static int qemu_nbd_connections = -1; /* Non-negative if this is qemu-nbd */
static void nbd_update_server_watch(NBDServerData *s);
-void nbd_server_is_qemu_nbd(bool value)
+void nbd_server_is_qemu_nbd(int max_connections)
{
- is_qemu_nbd = value;
+ qemu_nbd_connections = max_connections;
}
bool nbd_server_is_running(void)
{
- return nbd_server || is_qemu_nbd;
+ return nbd_server || qemu_nbd_connections >= 0;
}
static void nbd_blockdev_client_closed(NBDClient *client, bool ignored)
diff --git a/qemu-nbd.c b/qemu-nbd.c
index 713e7557a9eb..8c25ae93df83 100644
--- a/qemu-nbd.c
+++ b/qemu-nbd.c
@@ -1087,7 +1087,7 @@ int main(int argc, char **argv)
bs->detect_zeroes = detect_zeroes;
- nbd_server_is_qemu_nbd(true);
+ nbd_server_is_qemu_nbd(shared);
export_opts = g_new(BlockExportOptions, 1);
*export_opts = (BlockExportOptions) {
--
2.35.1
