unfs3: Add a NFSv3 user mode server for use with runqemu

The user mode nfs server allows the use of runqemu without any root
privileges and may even be accelerated with kvm.

Example:

runqemu-extract-sdk tmp-eglibc/deploy/images/qemux86-64/core-image-minimal-qemux86-64.tar.bz2 rootfs

runqemu qemux86-64 `pwd`/rootfs nographic slirp kvm

[YOCTO #5639]

(From OE-Core rev: 24183f5ec9c71db936e75060387941463d30d962)

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 25 insertions, 0 deletions

diff --git a/meta/recipes-devtools/unfs3/unfs3/fix_compile_warning.patch b/meta/recipes-devtools/unfs3/unfs3/fix_compile_warning.patch
new file mode 100644
index 0000000000..604824a230
--- /dev/null
+++ b/meta/recipes-devtools/unfs3/unfs3/fix_compile_warning.patch
@@ -0,0 +1,25 @@
+daemon.c: Check exit code of chdir()
+
+Stop the compile warning and fix the code to act on a chdir() failure.
+If this one does fail something is very, very wrong.
+
+Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
+
+Upstream-Status: Pending
+
+---
+ daemon.c |    3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+--- a/daemon.c
++++ b/daemon.c
+@@ -964,7 +964,8 @@ int main(int argc, char **argv)
+        sigaction(SIGALRM, &act, NULL);
+ 
+        /* don't make directory we started in busy */
+-       chdir("/");
++       if(chdir("/") < 0)
++           daemon_exit(0);
+ 
+        /* detach from terminal */
+        if (opt_detach) {