From: Greg Banks <[email protected]>
knfsd: add svc_get() for those occasions when we need to temporarily
bump up svc_serv->sv_nrthreads as a pseudo refcount.
Signed-off-by: Greg Banks <[email protected]>
Signed-off-by: Neil Brown <[email protected]>
### Diffstat output
./fs/nfsd/nfssvc.c | 2 +-
./include/linux/sunrpc/svc.h | 11 +++++++++++
2 files changed, 12 insertions(+), 1 deletion(-)
diff .prev/fs/nfsd/nfssvc.c ./fs/nfsd/nfssvc.c
--- .prev/fs/nfsd/nfssvc.c 2006-07-28 15:01:38.000000000 +1000
+++ ./fs/nfsd/nfssvc.c 2006-07-31 10:20:49.000000000 +1000
@@ -200,7 +200,7 @@ int nfsd_create_serv(void)
int err = 0;
lock_kernel();
if (nfsd_serv) {
- nfsd_serv->sv_nrthreads++;
+ svc_get(nfsd_serv);
unlock_kernel();
return 0;
}
diff .prev/include/linux/sunrpc/svc.h ./include/linux/sunrpc/svc.h
--- .prev/include/linux/sunrpc/svc.h 2006-07-31 10:14:54.000000000 +1000
+++ ./include/linux/sunrpc/svc.h 2006-07-31 10:20:49.000000000 +1000
@@ -71,6 +71,17 @@ struct svc_serv {
};
/*
+ * We use sv_nrthreads as a reference count. svc_destroy() drops
+ * this refcount, so we need to bump it up around operations that
+ * change the number of threads. Horrible, but there it is.
+ * Should be called with the BKL held.
+ */
+static inline void svc_get(struct svc_serv *serv)
+{
+ serv->sv_nrthreads++;
+}
+
+/*
* Maximum payload size supported by a kernel RPC server.
* This is use to determine the max number of pages nfsd is
* willing to return in a single READ operation.
-
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