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-rw-r--r--block/rbd.c24
-rw-r--r--meson.build6
2 files changed, 30 insertions, 0 deletions
diff --git a/block/rbd.c b/block/rbd.c
index 6caf35cbba..f826410f40 100644
--- a/block/rbd.c
+++ b/block/rbd.c
@@ -831,6 +831,26 @@ static int qemu_rbd_connect(rados_t *cluster, rados_ioctx_t *io_ctx,
         error_setg_errno(errp, -r, "error opening pool %s", opts->pool);
         goto failed_shutdown;
     }
+
+#ifdef HAVE_RBD_NAMESPACE_EXISTS
+    if (opts->has_q_namespace && strlen(opts->q_namespace) > 0) {
+        bool exists;
+
+        r = rbd_namespace_exists(*io_ctx, opts->q_namespace, &exists);
+        if (r < 0) {
+            error_setg_errno(errp, -r, "error checking namespace");
+            goto failed_ioctx_destroy;
+        }
+
+        if (!exists) {
+            error_setg(errp, "namespace '%s' does not exist",
+                       opts->q_namespace);
+            r = -ENOENT;
+            goto failed_ioctx_destroy;
+        }
+    }
+#endif
+
     /*
      * Set the namespace after opening the io context on the pool,
      * if nspace == NULL or if nspace == "", it is just as we did nothing
@@ -840,6 +860,10 @@ static int qemu_rbd_connect(rados_t *cluster, rados_ioctx_t *io_ctx,
     r = 0;
     goto out;
 
+#ifdef HAVE_RBD_NAMESPACE_EXISTS
+failed_ioctx_destroy:
+    rados_ioctx_destroy(*io_ctx);
+#endif
 failed_shutdown:
     rados_shutdown(*cluster);
 out:
diff --git a/meson.build b/meson.build
index 397ca1d60a..a113078f1a 100644
--- a/meson.build
+++ b/meson.build
@@ -1903,6 +1903,12 @@ config_host_data.set('HAVE_GETIFADDRS', cc.has_function('getifaddrs'))
 config_host_data.set('HAVE_OPENPTY', cc.has_function('openpty', dependencies: util))
 config_host_data.set('HAVE_STRCHRNUL', cc.has_function('strchrnul'))
 config_host_data.set('HAVE_SYSTEM_FUNCTION', cc.has_function('system', prefix: '#include <stdlib.h>'))
+if rbd.found()
+  config_host_data.set('HAVE_RBD_NAMESPACE_EXISTS',
+                       cc.has_function('rbd_namespace_exists',
+                                       dependencies: rbd,
+                                       prefix: '#include <rbd/librbd.h>'))
+endif
 if rdma.found()
   config_host_data.set('HAVE_IBV_ADVISE_MR',
                        cc.has_function('ibv_advise_mr',