rpc.nfsd to write to /proc/fs/nfs/threads if available

1 files changed, 21 insertions, 0 deletions

diff --git a/support/nfs/nfssvc.c b/support/nfs/nfssvc.c
index 7419baf..dae16f7 100644
--- a/support/nfs/nfssvc.c
+++ b/support/nfs/nfssvc.c
@@ -8,12 +8,33 @@
 
 #include "config.h"
 
+#include <unistd.h>
+#include <fcntl.h>
+
 #include "nfslib.h"
 
 int
 nfssvc(int port, int nrservs)
 {
 	struct nfsctl_arg	arg;
+	int fd;
+
+	fd = open("/proc/fs/nfs/threads", O_WRONLY);
+	if (fd >= 0) {
+		/* 2.5+ kernel with nfsd filesystem mounted.
+		 * Just write the number in.
+		 * Cannot handle port number yet, but does anyone care?
+		 */
+		char buf[20];
+		int n;
+		snprintf(buf, 20,"%d\n", nrservs);
+		n = write(fd, buf, strlen(buf));
+		close(fd);
+		if (n != strlen(buf))
+			return -1;
+		else
+			return 0;
+	}
 
 	arg.ca_version = NFSCTL_VERSION;
 	arg.ca_svc.svc_nthreads = nrservs;