From 565ee23ea2374a0ec42bb70227447baa81fcd196 Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Wed, 25 Mar 2026 10:40:33 -0400 Subject: sunrpc: add SUNRPC_CMD_CACHE_FLUSH netlink command Add a new SUNRPC_CMD_CACHE_FLUSH generic netlink command that allows userspace to flush the sunrpc auth caches (ip_map and unix_gid) without writing to /proc/net/rpc/*/flush. An optional SUNRPC_A_CACHE_FLUSH_MASK u32 attribute selects which caches to flush (bit 1 = ip_map, bit 2 = unix_gid). If the attribute is omitted, all sunrpc caches are flushed. This is used by exportfs to replace its /proc-based cache_flush() with a netlink equivalent, with /proc fallback for older kernels. Signed-off-by: Jeff Layton Signed-off-by: Chuck Lever --- Documentation/netlink/specs/sunrpc_cache.yaml | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'Documentation') diff --git a/Documentation/netlink/specs/sunrpc_cache.yaml b/Documentation/netlink/specs/sunrpc_cache.yaml index ed0ddb61ebcf..55dabc914dbc 100644 --- a/Documentation/netlink/specs/sunrpc_cache.yaml +++ b/Documentation/netlink/specs/sunrpc_cache.yaml @@ -76,6 +76,14 @@ attribute-sets: type: nest nested-attributes: unix-gid multi-attr: true + - + name: cache-flush + attributes: + - + name: mask + type: u32 + enum: cache-type + enum-as-flags: true operations: list: @@ -123,6 +131,15 @@ operations: request: attributes: - requests + - + name: cache-flush + doc: Flush sunrpc caches (ip_map and/or unix_gid) + attribute-set: cache-flush + flags: [admin-perm] + do: + request: + attributes: + - mask mcast-groups: list: -- cgit v1.2.3