[PATCH v2 05/13] sunrpc: add a cache_notify callback
From: Jeff Layton <jlayton@kernel.org>
Date: 2026-03-25 14:40:59
Also in:
linux-nfs, lkml
Subsystem:
kernel nfsd, sunrpc, and lockd servers, networking [general], nfs, sunrpc, and lockd clients, the rest · Maintainers:
Chuck Lever, Jeff Layton, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Trond Myklebust, Anna Schumaker, Linus Torvalds
A later patch will be changing the kernel to send a netlink notification when there is a pending cache_request. Add a new cache_notify operation to struct cache_detail for this purpose. Signed-off-by: Jeff Layton <jlayton@kernel.org> --- include/linux/sunrpc/cache.h | 3 +++ net/sunrpc/cache.c | 2 ++ 2 files changed, 5 insertions(+)
diff --git a/include/linux/sunrpc/cache.h b/include/linux/sunrpc/cache.h
index 80a3f17731d8fbc1c5252a830b202016faa41a18..c358151c23950ab48e83991c6138bb7d0e049ace 100644
--- a/include/linux/sunrpc/cache.h
+++ b/include/linux/sunrpc/cache.h@@ -80,6 +80,9 @@ struct cache_detail { int (*cache_upcall)(struct cache_detail *, struct cache_head *); + int (*cache_notify)(struct cache_detail *cd, + struct cache_head *h); + void (*cache_request)(struct cache_detail *cd, struct cache_head *ch, char **bpp, int *blen);
diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c
index 8a66128a1bfabca42b52f274ea34c1b594a5920b..a182a179a1bfdb883ceda417a5809d967659be5d 100644
--- a/net/sunrpc/cache.c
+++ b/net/sunrpc/cache.c@@ -1233,6 +1233,8 @@ static int cache_do_upcall(struct cache_detail *detail, struct cache_head *h) /* Lost a race, no longer PENDING, so don't enqueue */ ret = -EAGAIN; spin_unlock(&detail->queue_lock); + if (ret != -EAGAIN && detail->cache_notify) + detail->cache_notify(detail, h); wake_up(&detail->queue_wait); if (ret == -EAGAIN) { kfree(buf);
--
2.53.0