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vsock: document write-once behavior of the child_ns_mode sysctl

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Update the vsock child_ns_mode documentation to include the new
write-once semantics of setting child_ns_mode. The semantics are
implemented in a preceding patch in this series.

Signed-off-by: Bobby Eshleman <bobbyeshleman@meta.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://patch.msgid.link/20260223-vsock-ns-write-once-v3-3-c0cde6959923@meta.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Bobby Eshleman 2026-02-23 14:38:34 -08:00 • committed by Paolo Abeni
parent 102eab95f0
commit b6302e057f
1 changed files with 3 additions and 0 deletions
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3
Documentation/admin-guide/sysctl/net.rst
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@ -594,6 +594,9 @@ Values:
their sockets will only be able to connect within their own
namespace.
The first write to ``child_ns_mode`` locks its value. Subsequent writes of the
same value succeed, but writing a different value returns ``-EBUSY``.
Changing ``child_ns_mode`` only affects namespaces created after the change;
it does not modify the current namespace or any existing children.