From: Stefan Hajnoczi <stefanha@redhat.com>
Date: Mon, 27 Jan 2020 19:01:08 +0000
Subject: [PATCH] virtiofsd: make -f (foreground) the default
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According to vhost-user.rst "Backend program conventions", backend
programs should run in the foregound by default.  Follow the
conventions so libvirt and other management tools can control virtiofsd
in a standard way.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
(cherry picked from commit 0bbd31753714ac2899efda0f0de31e353e965789)
---
 tools/virtiofsd/helper.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tools/virtiofsd/helper.c b/tools/virtiofsd/helper.c
index 676032e71f..a3645fc807 100644
--- a/tools/virtiofsd/helper.c
+++ b/tools/virtiofsd/helper.c
@@ -29,6 +29,11 @@
     {                                               \
         t, offsetof(struct fuse_cmdline_opts, p), 1 \
     }
+#define FUSE_HELPER_OPT_VALUE(t, p, v)              \
+    {                                               \
+        t, offsetof(struct fuse_cmdline_opts, p), v \
+    }
+
 
 static const struct fuse_opt fuse_helper_opts[] = {
     FUSE_HELPER_OPT("-h", show_help),
@@ -42,6 +47,7 @@ static const struct fuse_opt fuse_helper_opts[] = {
     FUSE_OPT_KEY("-d", FUSE_OPT_KEY_KEEP),
     FUSE_OPT_KEY("debug", FUSE_OPT_KEY_KEEP),
     FUSE_HELPER_OPT("-f", foreground),
+    FUSE_HELPER_OPT_VALUE("--daemonize", foreground, 0),
     FUSE_HELPER_OPT("fsname=", nodefault_subtype),
     FUSE_OPT_KEY("fsname=", FUSE_OPT_KEY_KEEP),
     FUSE_HELPER_OPT("subtype=", nodefault_subtype),
@@ -131,6 +137,7 @@ void fuse_cmdline_help(void)
            "    -V   --version             print version\n"
            "    -d   -o debug              enable debug output (implies -f)\n"
            "    -f                         foreground operation\n"
+           "    --daemonize                run in background\n"
            "    -o max_idle_threads        the maximum number of idle worker "
            "threads\n"
            "                               allowed (default: 10)\n");
@@ -158,6 +165,7 @@ int fuse_parse_cmdline(struct fuse_args *args, struct fuse_cmdline_opts *opts)
     memset(opts, 0, sizeof(struct fuse_cmdline_opts));
 
     opts->max_idle_threads = 10;
+    opts->foreground = 1;
 
     if (fuse_opt_parse(args, opts, fuse_helper_opts, fuse_helper_opt_proc) ==
         -1) {