idmapd: Use inotify instead of dnotify

Remove last use of dnotify in nfs-utils by bringing idmapd upto
date with (required) inotify use by gssd and blkmapd.

Acked-by: J. Bruce Fields <bfields@fieldses.org>
Signed-off-by: Alan Swanson <reiver@improbability.net>
Signed-off-by: Steve Dickson <steved@redhat.com>

1 files changed, 17 insertions, 15 deletions

diff --git a/utils/idmapd/idmapd.c b/utils/idmapd/idmapd.c
index d14eef73..91c02537 100644
--- a/utils/idmapd/idmapd.c
+++ b/utils/idmapd/idmapd.c
@@ -36,7 +36,7 @@
 
 #include <sys/types.h>
 #include <sys/time.h>
-#include <sys/poll.h>
+#include <sys/inotify.h>
 #include <sys/socket.h>
 #include <sys/stat.h>
 #include <time.h>
@@ -205,15 +205,16 @@ static void usage(char *progname)
 int
 main(int argc, char **argv)
 {
-	int fd = 0, opt, fg = 0, nfsdret = -1;
+	int wd = -1, opt, fg = 0, nfsdret = -1;
 	struct idmap_clientq icq;
-	struct event rootdirev, clntdirev, svrdirev;
+	struct event rootdirev, clntdirev, svrdirev, inotifyev;
 	struct event initialize;
 	struct passwd *pw;
 	struct group *gr;
 	struct stat sb;
 	char *xpipefsdir = NULL;
 	int serverstart = 1, clientstart = 1;
+	int inotify_fd;
 	int ret;
 	char *progname;
 	char *conf_path = NULL;
@@ -381,18 +382,15 @@ main(int argc, char **argv)
 			}
 		}
 
-		if ((fd = open(pipefsdir, O_RDONLY)) == -1)
-			xlog_err("main: open(%s): %s", pipefsdir, strerror(errno));
-
-		if (fcntl(fd, F_SETSIG, SIGUSR1) == -1)
-			xlog_err("main: fcntl(%s): %s", pipefsdir, strerror(errno));
-
-		if (fcntl(fd, F_NOTIFY,
-			DN_CREATE | DN_DELETE | DN_MODIFY | DN_MULTISHOT) == -1) {
-			xlog_err("main: fcntl(%s): %s", pipefsdir, strerror(errno));
-			if (errno == EINVAL)
-				xlog_err("main: Possibly no Dnotify support in kernel.");
+		inotify_fd = inotify_init1(IN_NONBLOCK);
+		if (inotify_fd == -1) {
+			xlog_err("Unable to initialise inotify_init1: %s\n", strerror(errno));
+		} else {
+			wd = inotify_add_watch(inotify_fd, pipefsdir, IN_CREATE | IN_DELETE | IN_MODIFY);
+			if (wd < 0)
+				xlog_err("Unable to inotify_add_watch(%s): %s\n", pipefsdir, strerror(errno));
 		}
+
 		TAILQ_INIT(&icq);
 
 		/* These events are persistent */
@@ -402,6 +400,10 @@ main(int argc, char **argv)
 		signal_add(&clntdirev, NULL);
 		signal_set(&svrdirev, SIGHUP, svrreopen, NULL);
 		signal_add(&svrdirev, NULL);
+		if ( wd >= 0) {
+			event_set(&inotifyev, inotify_fd, EV_READ, dirscancb, &icq);
+			event_add(&inotifyev, NULL);
+		}
 
 		/* Fetch current state */
 		/* (Delay till start of event_dispatch to avoid possibly losing
@@ -410,7 +412,7 @@ main(int argc, char **argv)
 		evtimer_add(&initialize, &now);
 	}
 
-	if (nfsdret != 0 && fd == 0)
+	if (nfsdret != 0 && wd < 0)
 		xlog_err("main: Neither NFS client nor NFSd found");
 
 	daemon_ready();