[PATCH v2 05/13] sunrpc: add a cache_notify callback

Jeff Layton
2026-03-25T14:40:59Z

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