From 3473a8496387246e7666ee45c801486d8d70bc4f Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher
Date: Fri, 4 Jan 2019 23:15:04 +0100
Subject: fusefrontend: print warning when Create() runs out of file
 descriptors

We alread have this warning in Open(), but xfstests generic/488
causes "too many open files" via Create. Add the same message so
the user sees what is going on.
---
 internal/fusefrontend/fs.go | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'internal/fusefrontend/fs.go')

diff --git a/internal/fusefrontend/fs.go b/internal/fusefrontend/fs.go
index af97333..f35fafd 100644
--- a/internal/fusefrontend/fs.go
+++ b/internal/fusefrontend/fs.go
@@ -255,6 +255,12 @@ func (fs *FS) Create(path string, flags uint32, mode uint32, context *fuse.Conte
 		// Create content, normal (short) file name
 		fd, err = syscallcompat.Openat(dirfd, cName, newFlags|syscall.O_CREAT|syscall.O_EXCL, mode)
 		if err != nil {
+			// xfstests generic/488 triggers this
+			if err == syscall.EMFILE {
+				var lim syscall.Rlimit
+				syscall.Getrlimit(syscall.RLIMIT_NOFILE, &lim)
+				tlog.Warn.Printf("Create %q: too many open files. Current \"ulimit -n\": %d", cName, lim.Cur)
+			}
 			return nil, fuse.ToStatus(err)
 		}
 	}
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