device-mapper-multipath/0073-RHBZ-650664-clarify-error-msg.patch

---
 libmultipath/alias.c     |   14 ++++++++++----
 libmultipath/callout.c   |    5 ++++-
 libmultipath/discovery.c |    7 +++++--
 libmultipath/file.c      |   14 ++++++++++----
 libmultipath/finder.c    |    7 +++++--
 libmultipath/sysfs.c     |   14 ++++++++++----
 6 files changed, 44 insertions(+), 17 deletions(-)

Index: multipath-tools/libmultipath/callout.c
===================================================================
--- multipath-tools.orig/libmultipath/callout.c
+++ multipath-tools/libmultipath/callout.c
@@ -65,7 +65,10 @@ int execute_program(char *path, char *va
 	retval = pipe(fds);
 
 	if (retval != 0) {
-		condlog(0, "error creating pipe for callout: %s", strerror(errno));
+		if (errno == EMFILE)
+			condlog(0, "out of file descriptors. set or increase max_fds in /etc/multipath.conf");
+		else
+			condlog(0, "error creating pipe for callout: %s", strerror(errno));
 		return -1;
 	}
 
Index: multipath-tools/libmultipath/discovery.c
===================================================================
--- multipath-tools.orig/libmultipath/discovery.c
+++ multipath-tools/libmultipath/discovery.c
@@ -945,8 +945,11 @@ pathinfo (struct path *pp, vector hwtabl
 		pp->fd = opennode(pp->dev, O_RDONLY);
 
 	if (pp->fd < 0) {
-		condlog(4, "Couldn't open node for %s: %s",
-			pp->dev, strerror(errno));
+		if (errno == EMFILE)
+			condlog(0, "out of file descriptors. set or increase max_fds in /etc/multipath.conf");
+		else
+			condlog(4, "Couldn't open node for %s: %s",
+				pp->dev, strerror(errno));
 		goto blank;
 	}
 
Index: multipath-tools/libmultipath/file.c
===================================================================
--- multipath-tools.orig/libmultipath/file.c
+++ multipath-tools/libmultipath/file.c
@@ -140,8 +140,11 @@ open_file(char *file, int *can_write, ch
 			}
 		}
 		else {
-			condlog(0, "Cannot open file [%s] : %s", file,
-				strerror(errno));
+			if (errno == EMFILE)
+				condlog(0, "out of file descriptors. set or increase max_fds in /etc/multipath.conf");
+			else
+				condlog(0, "Cannot open file [%s] : %s", file,
+					strerror(errno));
 			return -1;
 		}
 	}
@@ -186,8 +189,11 @@ int pidfile_check(const char *file)
 	if (fd < 0) {
 		if (errno == ENOENT)
 			return 0;
-		condlog(0, "Cannot open pidfile, %s : %s", file,
-			strerror(errno));
+		if (errno == EMFILE)
+			condlog(0, "out of file descriptors. set or increase max_fds in /etc/multipath.conf");
+		else
+			condlog(0, "Cannot open pidfile, %s : %s", file,
+				strerror(errno));
 		return -1;
 	}
 	lock.l_type = F_WRLCK;
Index: multipath-tools/libmultipath/sysfs.c
===================================================================
--- multipath-tools.orig/libmultipath/sysfs.c
+++ multipath-tools/libmultipath/sysfs.c
@@ -392,8 +392,11 @@ sysfs_attr_set_value(const char *devpath
 
 	fd = open(path_full, O_WRONLY);
 	if (fd < 0) {
-		dbg("attribute '%s' can not be opened: %s",
-		    path_full, strerror(errno));
+		if (errno == EMFILE)
+			dbg("out of file descriptors. set or increase max_fds in /etc/multipath.conf");
+		else
+			dbg("attribute '%s' can not be opened: %s",
+			    path_full, strerror(errno));
 		goto out;
 	}
 	value_len = strlen(value) + 1;
@@ -494,8 +497,11 @@ char *sysfs_attr_get_value(const char *d
 	/* read attribute value */
 	fd = open(path_full, O_RDONLY);
 	if (fd < 0) {
-		dbg("attribute '%s' can not be opened: %s",
-		    path_full, strerror(errno));
+		if (errno == EMFILE)
+			dbg("out of file descriptors. set or increase max_fds in /etc/multipath.conf");
+		else
+			dbg("attribute '%s' can not be opened: %s",
+			    path_full, strerror(errno));
 		goto out;
 	}
 	size = read(fd, value, sizeof(value));
Index: multipath-tools/libmultipath/alias.c
===================================================================
--- multipath-tools.orig/libmultipath/alias.c
+++ multipath-tools/libmultipath/alias.c
@@ -224,8 +224,11 @@ get_user_friendly_alias(char *wwid, char
 
 	scan_fd = dup(fd);
 	if (scan_fd < 0) {
-		condlog(0, "Cannot dup bindings file descriptor : %s",
-			strerror(errno));
+		if (errno == EMFILE)
+			condlog(0, "out of file descriptors. set or increase max_fds in /etc/multipath.conf");
+		else
+			condlog(0, "Cannot dup bindings file descriptor : %s",
+				strerror(errno));
 		close(fd);
 		return NULL;
 	}
@@ -274,8 +277,11 @@ get_user_friendly_wwid(char *alias, char
 
 	scan_fd = dup(fd);
 	if (scan_fd < 0) {
-		condlog(0, "Cannot dup bindings file descriptor : %s",
-			strerror(errno));
+		if (errno == EMFILE)
+			condlog(0, "out of file descriptors. set or increase max_fds in /etc/multipath.conf");
+		else
+			condlog(0, "Cannot dup bindings file descriptor : %s",
+				strerror(errno));
 		close(fd);
 		return NULL;
 	}
Index: multipath-tools/libmultipath/finder.c
===================================================================
--- multipath-tools.orig/libmultipath/finder.c
+++ multipath-tools/libmultipath/finder.c
@@ -89,8 +89,11 @@ check_wwids_file(char *wwid, int write_w
 
 	scan_fd = dup(fd);
 	if (scan_fd < 0) {
-		condlog(0, "can't dup wwids file descriptor : %s",
-			strerror(errno));
+		if (errno == EMFILE)
+			condlog(0, "out of file descriptors. set or increase max_fds in /etc/multipath.conf");
+		else
+			condlog(0, "can't dup wwids file descriptor : %s",
+				strerror(errno));
 		close(fd);
 		return -1;
 	}