X-Git-Url: https://git.decadent.org.uk/gitweb/?p=nfs-utils.git;a=blobdiff_plain;f=utils%2Fstatd%2Fsm-notify.c;h=b7f43715b5e536d284571a7a506aaed9942b3a7d;hp=66a52eb93ca836b42ba86db2ec19f62dd5a4fbb5;hb=1ea2c3be33f2eb4630c5cdb78edf2bb670b294ab;hpb=f0d3a4bedccca7cce48296757bc1c8bd59b80828

diff --git a/utils/statd/sm-notify.c b/utils/statd/sm-notify.c
index 66a52eb..b7f4371 100644
--- a/utils/statd/sm-notify.c
+++ b/utils/statd/sm-notify.c
@@ -34,16 +34,14 @@
 #include "nsm.h"
 #include "nfsrpc.h"
 
-#ifndef HAVE_DECL_AI_ADDRCONFIG
-#define AI_ADDRCONFIG	0
-#endif
-
 #define NSM_TIMEOUT	2
 #define NSM_MAX_TIMEOUT	120	/* don't make this too big */
 
 struct nsm_host {
 	struct nsm_host *	next;
 	char *			name;
+	char *			mon_name;
+	char *			my_name;
 	struct addrinfo		*ai;
 	time_t			last_used;
 	time_t			send_next;
@@ -52,7 +50,7 @@ struct nsm_host {
 	uint32_t		xid;
 };
 
-static char		nsm_hostname[256];
+static char		nsm_hostname[SM_MAXSTRLEN + 1];
 static int		nsm_state;
 static int		nsm_family = AF_INET;
 static int		opt_debug = 0;
@@ -76,7 +74,6 @@ smn_lookup(const char *name)
 {
 	struct addrinfo	*ai = NULL;
 	struct addrinfo hint = {
-		.ai_flags	= AI_ADDRCONFIG,
 		.ai_family	= (nsm_family == AF_INET ? AF_INET: AF_UNSPEC),
 		.ai_protocol	= (int)IPPROTO_UDP,
 	};
@@ -93,7 +90,8 @@ smn_lookup(const char *name)
 
 __attribute_malloc__
 static struct nsm_host *
-smn_alloc_host(const char *hostname, const time_t timestamp)
+smn_alloc_host(const char *hostname, const char *mon_name,
+		const char *my_name, const time_t timestamp)
 {
 	struct nsm_host	*host;
 
@@ -102,7 +100,14 @@ smn_alloc_host(const char *hostname, const time_t timestamp)
 		goto out_nomem;
 
 	host->name = strdup(hostname);
-	if (host->name == NULL) {
+	host->mon_name = strdup(mon_name);
+	host->my_name = strdup(my_name);
+	if (host->name == NULL ||
+	    host->mon_name == NULL ||
+	    host->my_name == NULL) {
+		free(host->my_name);
+		free(host->mon_name);
+		free(host->name);
 		free(host);
 		goto out_nomem;
 	}
@@ -120,10 +125,13 @@ out_nomem:
 
 static void smn_forget_host(struct nsm_host *host)
 {
-	xlog(D_CALL, "Removing %s from notify list", host->name);
+	xlog(D_CALL, "Removing %s (%s, %s) from notify list",
+			host->name, host->mon_name, host->my_name);
 
-	nsm_delete_notified_host(host->name);
+	nsm_delete_notified_host(host->name, host->mon_name, host->my_name);
 
+	free(host->my_name);
+	free(host->mon_name);
 	free(host->name);
 	if (host->ai)
 		freeaddrinfo(host->ai);
@@ -134,12 +142,12 @@ static void smn_forget_host(struct nsm_host *host)
 static unsigned int
 smn_get_host(const char *hostname,
 		__attribute__ ((unused)) const struct sockaddr *sap,
-		__attribute__ ((unused)) const struct mon *m,
-		const time_t timestamp)
+		const struct mon *m, const time_t timestamp)
 {
 	struct nsm_host	*host;
 
-	host = smn_alloc_host(hostname, timestamp);
+	host = smn_alloc_host(hostname,
+		m->mon_id.mon_name, m->mon_id.my_id.my_name, timestamp);
 	if (host == NULL)
 		return 0;
 
@@ -399,12 +407,33 @@ usage:		fprintf(stderr,
 		}
 	}
 
-	if (opt_srcaddr) {
-		strncpy(nsm_hostname, opt_srcaddr, sizeof(nsm_hostname)-1);
-	} else
-	if (gethostname(nsm_hostname, sizeof(nsm_hostname)) < 0) {
-		xlog(L_ERROR, "Failed to obtain name of local host: %m");
-		exit(1);
+	if (opt_srcaddr != NULL) {
+		struct addrinfo *ai = NULL;
+		struct addrinfo hint = {
+			.ai_family	= AF_UNSPEC,
+			.ai_flags	= AI_NUMERICHOST,
+		};
+
+		if (getaddrinfo(opt_srcaddr, NULL, &hint, &ai))
+			/* not a presentation address - use it */
+			strncpy(nsm_hostname, opt_srcaddr, sizeof(nsm_hostname));
+		else {
+			/* was a presentation address - look it up in
+			 * /etc/hosts, so it can be used for my_name */
+			int error;
+
+			freeaddrinfo(ai);
+			hint.ai_flags = AI_CANONNAME;
+			error = getaddrinfo(opt_srcaddr, NULL, &hint, &ai);
+			if (error != 0) {
+				xlog(L_ERROR, "Bind address %s is unusable: %s",
+						opt_srcaddr, gai_strerror(error));
+				exit(1);
+			}
+			strncpy(nsm_hostname, ai->ai_canonname,
+							sizeof(nsm_hostname));
+			freeaddrinfo(ai);
+		}
 	}
 
 	(void)nsm_retire_monitored_hosts();
@@ -522,6 +551,8 @@ notify(const int sock)
 static int
 notify_host(int sock, struct nsm_host *host)
 {
+	const char *my_name = (opt_srcaddr != NULL ?
+					nsm_hostname : host->my_name);
 	struct sockaddr *sap;
 	socklen_t salen;
 
@@ -567,8 +598,8 @@ notify_host(int sock, struct nsm_host *host)
 		host->xid = nsm_xmit_rpcbind(sock, sap, SM_PROG, SM_VERS);
 	else
 		host->xid = nsm_xmit_notify(sock, sap, salen,
-				SM_PROG, nsm_hostname, nsm_state);
-	
+					SM_PROG, my_name, nsm_state);
+
 	return 0;
 }
 
@@ -598,15 +629,28 @@ recv_rpcbind_reply(struct sockaddr *sap, struct nsm_host *host, XDR *xdr)
 }
 
 /*
- * Successful NOTIFY call. Server returns void, so nothing
- * we need to do here.
+ * Successful NOTIFY call. Server returns void.
+ *
+ * Try sending another SM_NOTIFY with an unqualified "my_name"
+ * argument.  Reuse the port number.  If "my_name" is already
+ * unqualified, we're done.
  */
 static void
 recv_notify_reply(struct nsm_host *host)
 {
-	xlog(D_GENERAL, "Host %s notified successfully", host->name);
+	char *dot = strchr(host->my_name, '.');
 
-	smn_forget_host(host);
+	if (dot != NULL) {
+		*dot = '\0';
+		host->send_next = time(NULL);
+		host->xid = 0;
+		if (host->timeout >= NSM_MAX_TIMEOUT / 4)
+			host->timeout = NSM_MAX_TIMEOUT / 4;
+		insert_host(host);
+	} else {
+		xlog(D_GENERAL, "Host %s notified successfully", host->name);
+		smn_forget_host(host);
+	}
 }
 
 /*