[RFC qemu 1/1] block/rbd: add @keyring-file option to BlockdevOptionsRbd

[DERUMIER, Alexandre]

for blockdev, do we still use a ceph config file in /var/run for
potential others rbd client options ?



-------- Message initial --------
De: Fiona Ebner <f.ebner at proxmox.com>
À: pve-devel at lists.proxmox.com
Cc: alexandre.derumier at groupe-cyllene.com
Objet: [RFC qemu 1/1] block/rbd: add @keyring-file option to
BlockdevOptionsRbd
Date: 09/05/2025 16:15:29

Signed-off-by: Fiona Ebner <f.ebner at proxmox.com>
---

I'll also submit this upstream.

 block/rbd.c          | 8 ++++++++
 qapi/block-core.json | 4 ++++
 2 files changed, 12 insertions(+)

diff --git a/block/rbd.c b/block/rbd.c
index 24e820d056..53a9a785f0 100644
--- a/block/rbd.c
+++ b/block/rbd.c
@@ -272,6 +272,14 @@ static int qemu_rbd_set_auth(rados_t cluster,
BlockdevOptionsRbd *opts,
         }
     }
 
+    if (opts->keyring_file) {
+        r = rados_conf_set(cluster, "keyring", opts->keyring_file);
+        if (r < 0) {
+            error_setg_errno(errp, -r, "Could not set 'keyring'");
+            return r;
+        }
+    }
+
     if (opts->has_auth_client_required) {
         accu = g_string_new("");
         for (auth = opts->auth_client_required; auth; auth = auth-
>next) {
diff --git a/qapi/block-core.json b/qapi/block-core.json
index 02c043f0f7..100277b371 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -4671,6 +4671,9 @@
 #     authentication.  This maps to Ceph configuration option "key".
 #     (Since 3.0)
 #
+# @keyring-file: File for the keyring used for cephx authentication.
+#     This maps to Ceph configuration option "keyring". (Since 10.1)
+#
 # @server: Monitor host address and port.  This maps to the "mon_host"
 #     Ceph option.
 #
@@ -4686,6 +4689,7 @@
             '*user': 'str',
             '*auth-client-required': ['RbdAuthMode'],
             '*key-secret': 'str',
+            '*keyring-file': 'str',
             '*server': ['InetSocketAddressBase'] } }
 
 ##