libmpathpersist: Set open fds limit in mpath_lib_init as mpathpersist called

libmpathpersist: Set open fds limit in mpath_lib_init as mpathpersist called

[Xieyingtai]

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Mpath persistent reserve out may fail due to file open failed when too many devices

were discoveryed but fd numbers not enough. Set open fds limit just like multipath

in that scene.

libmpathpersist/mpath_persist.c | 12 ++++++++++++
1 file changed, 12 insertions(+)

diff --git a/libmpathpersist/mpath_persist.c b/libmpathpersist/mpath_persist.c
index 113cf7f..d032c04 100644
--- a/libmpathpersist/mpath_persist.c
+++ b/libmpathpersist/mpath_persist.c
@@ -29,6 +29,8 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <sys/resource.h>
+#include <errno.h>
 #define __STDC_FORMAT_MACROS 1
@@ -40,6 +42,16 @@ mpath_lib_init (struct udev *udev)
                condlog(0, "Failed to initialize multipath config.");
                return 1;
       }
+
+       if (conf->max_fds) {
+                struct rlimit fd_limit;
+
+                fd_limit.rlim_cur = conf->max_fds;
+                fd_limit.rlim_max = conf->max_fds;
+                if (setrlimit(RLIMIT_NOFILE, &fd_limit) < 0)
+                          condlog(0, "can't set open fds limit to %d : %s",
+                                   conf->max_fds, strerror(errno));
+       }
        return 0;
}
--
1.8.3.4

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