X-Git-Url: https://git.decadent.org.uk/gitweb/?p=nfs-utils.git;a=blobdiff_plain;f=utils%2Fnfsd%2Fnfssvc.c;fp=utils%2Fnfsd%2Fnfssvc.c;h=6c5289a58979836fa5a73e1430ad7e6404229c1d;hp=0000000000000000000000000000000000000000;hb=f8dd0b70ecf5a02eda29af4acead86f3359c3081;hpb=3339c1f73c05fc9b5cf51e14a2033ec38f671334

diff --git a/utils/nfsd/nfssvc.c b/utils/nfsd/nfssvc.c
new file mode 100644
index 0000000..6c5289a
--- /dev/null
+++ b/utils/nfsd/nfssvc.c
@@ -0,0 +1,187 @@
+/*
+ * utils/nfsd/nfssvc.c
+ *
+ * Run an NFS daemon.
+ *
+ * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <syslog.h>
+
+
+#include "nfslib.h"
+
+#define NFSD_PORTS_FILE     "/proc/fs/nfsd/portlist"
+#define NFSD_VERS_FILE    "/proc/fs/nfsd/versions"
+#define NFSD_THREAD_FILE  "/proc/fs/nfsd/threads"
+
+static void
+nfssvc_setfds(int port, unsigned int ctlbits, char *haddr)
+{
+	int fd, n, on=1;
+	char buf[BUFSIZ];
+	int udpfd = -1, tcpfd = -1;
+	struct sockaddr_in sin;
+
+	fd = open(NFSD_PORTS_FILE, O_RDONLY);
+	if (fd < 0)
+		return;
+	n = read(fd, buf, BUFSIZ);
+	close(fd);
+	if (n != 0)
+		return;
+	/* there are no ports currently open, so it is safe to
+	 * try to open some and pass them through.
+	 * Note: If the user explicitly asked for 'udp', then
+	 * we should probably check if that is open, and should
+	 * open it if not.  However we don't yet.  All sockets
+	 * have to be opened when the first daemon is started.
+	 */
+	fd = open(NFSD_PORTS_FILE, O_WRONLY);
+	if (fd < 0)
+		return;
+	sin.sin_family = AF_INET;
+	sin.sin_port   = htons(port);
+	sin.sin_addr.s_addr =  inet_addr(haddr);
+
+	if (NFSCTL_UDPISSET(ctlbits)) {
+		udpfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+		if (udpfd < 0) {
+			syslog(LOG_ERR, "nfssvc: unable to create UPD socket: "
+				"errno %d (%s)\n", errno, strerror(errno));
+			exit(1);
+		}
+		if (bind(udpfd, (struct  sockaddr  *)&sin, sizeof(sin)) < 0){
+			syslog(LOG_ERR, "nfssvc: unable to bind UPD socket: "
+				"errno %d (%s)\n", errno, strerror(errno));
+			exit(1);
+		}
+	}
+
+	if (NFSCTL_TCPISSET(ctlbits)) {
+		tcpfd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
+		if (tcpfd < 0) {
+			syslog(LOG_ERR, "nfssvc: unable to createt tcp socket: "
+				"errno %d (%s)\n", errno, strerror(errno));
+			exit(1);
+		}
+		if (setsockopt(tcpfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0) {
+			syslog(LOG_ERR, "nfssvc: unable to set SO_REUSEADDR: "
+				"errno %d (%s)\n", errno, strerror(errno));
+			exit(1);
+		}
+		if (bind(tcpfd, (struct  sockaddr  *)&sin, sizeof(sin)) < 0){
+			syslog(LOG_ERR, "nfssvc: unable to bind TCP socket: "
+				"errno %d (%s)\n", errno, strerror(errno));
+			exit(1);
+		}
+		if (listen(tcpfd, 64) < 0){
+			syslog(LOG_ERR, "nfssvc: unable to create listening socket: "
+				"errno %d (%s)\n", errno, strerror(errno));
+			exit(1);
+		}
+	}
+	if (udpfd >= 0) {
+		snprintf(buf, BUFSIZ,"%d\n", udpfd); 
+		if (write(fd, buf, strlen(buf)) != strlen(buf)) {
+			syslog(LOG_ERR, 
+			       "nfssvc: writing fds to kernel failed: errno %d (%s)", 
+			       errno, strerror(errno));
+		}
+		close(fd);
+		fd = -1;
+	}
+	if (tcpfd >= 0) {
+		if (fd < 0)
+			fd = open(NFSD_PORTS_FILE, O_WRONLY);
+		snprintf(buf, BUFSIZ,"%d\n", tcpfd); 
+		if (write(fd, buf, strlen(buf)) != strlen(buf)) {
+			syslog(LOG_ERR, 
+			       "nfssvc: writing fds to kernel failed: errno %d (%s)", 
+			       errno, strerror(errno));
+		}
+	}
+	close(fd);
+
+	return;
+}
+static void
+nfssvc_versbits(unsigned int ctlbits, int minorvers4)
+{
+	int fd, n, off;
+	char buf[BUFSIZ], *ptr;
+
+	ptr = buf;
+	off = 0;
+	fd = open(NFSD_VERS_FILE, O_WRONLY);
+	if (fd < 0)
+		return;
+
+	for (n = NFSD_MINVERS; n <= NFSD_MAXVERS; n++) {
+		if (NFSCTL_VERISSET(ctlbits, n))
+		    off += snprintf(ptr+off, BUFSIZ - off, "+%d ", n);
+		else
+		    off += snprintf(ptr+off, BUFSIZ - off, "-%d ", n);
+	}
+	n = minorvers4 >= 0 ? minorvers4 : -minorvers4;
+	if (n >= NFSD_MINMINORVERS4 && n <= NFSD_MAXMINORVERS4)
+		    off += snprintf(ptr+off, BUFSIZ - off, "%c4.%d",
+				    minorvers4 > 0 ? '+' : '-',
+				    n);
+	snprintf(ptr+off, BUFSIZ - off, "\n");
+	if (write(fd, buf, strlen(buf)) != strlen(buf)) {
+		syslog(LOG_ERR, "nfssvc: Setting version failed: errno %d (%s)", 
+			errno, strerror(errno));
+	}
+	close(fd);
+
+	return;
+}
+int
+nfssvc(int port, int nrservs, unsigned int versbits, int minorvers4,
+	unsigned protobits, char *haddr)
+{
+	struct nfsctl_arg	arg;
+	int fd;
+
+	/* Note: must set versions before fds so that
+	 * the ports get registered with portmap against correct
+	 * versions
+	 */
+	nfssvc_versbits(versbits, minorvers4);
+	nfssvc_setfds(port, protobits, haddr);
+
+	fd = open(NFSD_THREAD_FILE, O_WRONLY);
+	if (fd < 0)
+		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;
+	arg.ca_svc.svc_port = port;
+	return nfsctl(NFSCTL_SVC, &arg, NULL);
+}