From 66dc5f9606bec7ce029e98a90f209153dfade82e Mon Sep 17 00:00:00 2001 From: Stefano Garzarella Date: Tue, 17 May 2022 09:10:12 +0200 Subject: [PATCH] block/rbd: report a better error when namespace does not exist If the namespace does not exist, rbd_create() fails with -ENOENT and QEMU reports a generic "error rbd create: No such file or directory": $ qemu-img create rbd:rbd/namespace/image 1M Formatting 'rbd:rbd/namespace/image', fmt=raw size=1048576 qemu-img: rbd:rbd/namespace/image: error rbd create: No such file or directory Unfortunately rados_ioctx_set_namespace() does not fail if the namespace does not exist, so let's use rbd_namespace_exists() in qemu_rbd_connect() to check if the namespace exists, reporting a more understandable error: $ qemu-img create rbd:rbd/namespace/image 1M Formatting 'rbd:rbd/namespace/image', fmt=raw size=1048576 qemu-img: rbd:rbd/namespace/image: namespace 'namespace' does not exist Reported-by: Tingting Mao Reviewed-by: Ilya Dryomov Signed-off-by: Stefano Garzarella Message-Id: <20220517071012.6120-1-sgarzare@redhat.com> Signed-off-by: Kevin Wolf --- block/rbd.c | 24 ++++++++++++++++++++++++ meson.build | 6 ++++++ 2 files changed, 30 insertions(+) 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 ')) +if rbd.found() + config_host_data.set('HAVE_RBD_NAMESPACE_EXISTS', + cc.has_function('rbd_namespace_exists', + dependencies: rbd, + prefix: '#include ')) +endif if rdma.found() config_host_data.set('HAVE_IBV_ADVISE_MR', cc.has_function('ibv_advise_mr', -- 2.11.0