From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

Add options to specify parameters for virtio-fs paths, i.e.

   ./virtiofsd -o vhost_user_socket=/tmp/vhostqemu

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
---
 contrib/virtiofsd/fuse_i.h        |  1 +
 contrib/virtiofsd/fuse_lowlevel.c | 10 +++++++---
 contrib/virtiofsd/helper.c        | 18 +++++++++---------
 3 files changed, 17 insertions(+), 12 deletions(-)

diff --git a/contrib/virtiofsd/fuse_i.h b/contrib/virtiofsd/fuse_i.h
index 6c3f432d0e..d65af06ff0 100644
--- a/contrib/virtiofsd/fuse_i.h
+++ b/contrib/virtiofsd/fuse_i.h
@@ -63,6 +63,7 @@ struct fuse_session {
 	struct fuse_notify_req notify_list;
 	size_t bufsize;
 	int error;
+	char *vu_socket_path;
 };
 
 struct fuse_chan {
diff --git a/contrib/virtiofsd/fuse_lowlevel.c b/contrib/virtiofsd/fuse_lowlevel.c
index 6fe7506ead..d47e4438f3 100644
--- a/contrib/virtiofsd/fuse_lowlevel.c
+++ b/contrib/virtiofsd/fuse_lowlevel.c
@@ -2064,6 +2064,8 @@ static const struct fuse_opt fuse_ll_opts[] = {
 	LL_OPTION("-d", debug, 1),
 	LL_OPTION("--debug", debug, 1),
 	LL_OPTION("allow_root", deny_others, 1),
+	LL_OPTION("--socket-path=%s", vu_socket_path, 0),
+	LL_OPTION("vhost_user_socket=%s", vu_socket_path, 0),
 	FUSE_OPT_END
 };
 
@@ -2078,9 +2080,11 @@ void fuse_lowlevel_help(void)
 	/* These are not all options, but the ones that are
 	   potentially of interest to an end-user */
 	printf(
-"    -o allow_other         allow access by all users\n"
-"    -o allow_root          allow access by root\n"
-"    -o auto_unmount        auto unmount on process termination\n");
+"    -o allow_other             allow access by all users\n"
+"    -o allow_root              allow access by root\n"
+"    --socket-path=PATH         path for the vhost-user socket\n"
+"    -o vhost_user_socket=PATH  path for the vhost-user socket\n"
+"    -o auto_unmount            auto unmount on process termination\n");
 }
 
 void fuse_session_destroy(struct fuse_session *se)
diff --git a/contrib/virtiofsd/helper.c b/contrib/virtiofsd/helper.c
index 958a42b6f4..f67533f053 100644
--- a/contrib/virtiofsd/helper.c
+++ b/contrib/virtiofsd/helper.c
@@ -126,15 +126,15 @@ static const struct fuse_opt conn_info_opt_spec[] = {
 
 void fuse_cmdline_help(void)
 {
-	printf("    -h   --help            print help\n"
-	       "    -V   --version         print version\n"
-	       "    -d   -o debug          enable debug output (implies -f)\n"
-	       "    -f                     foreground operation\n"
-	       "    -s                     disable multi-threaded operation\n"
-	       "    -o clone_fd            use separate fuse device fd for each thread\n"
-	       "                           (may improve performance)\n"
-	       "    -o max_idle_threads    the maximum number of idle worker threads\n"
-	       "                           allowed (default: 10)\n");
+	printf("    -h   --help                print help\n"
+	       "    -V   --version             print version\n"
+	       "    -d   -o debug              enable debug output (implies -f)\n"
+	       "    -f                         foreground operation\n"
+	       "    -s                         disable multi-threaded operation\n"
+	       "    -o clone_fd                use separate fuse device fd for each thread\n"
+	       "                               (may improve performance)\n"
+	       "    -o max_idle_threads        the maximum number of idle worker threads\n"
+	       "                               allowed (default: 10)\n");
 }
 
 static int fuse_helper_opt_proc(void *data, const char *arg, int key,
-- 
2.23.0