Check protocol version before sending notifications

Check protocol version before sending notifications and return -ENOSYS if a
particular notification is not supported.

1 files changed, 9 insertions, 0 deletions

diff --git a/lib/fuse_lowlevel.c b/lib/fuse_lowlevel.c
index a0d4887..2282ccf 100644
--- a/lib/fuse_lowlevel.c
+++ b/lib/fuse_lowlevel.c
@@ -2028,6 +2028,9 @@ int fuse_lowlevel_notify_delete(struct fuse_chan *ch,
 	if (!f)
 		return -ENODEV;
 
+	if (f->conn.proto_minor < 18)
+		return -ENOSYS;
+
 	outarg.parent = parent;
 	outarg.child = child;
 	outarg.namelen = namelen;
@@ -2059,6 +2062,9 @@ int fuse_lowlevel_notify_store(struct fuse_chan *ch, fuse_ino_t ino,
 	if (!f)
 		return -ENODEV;
 
+	if (f->conn.proto_minor < 15)
+		return -ENOSYS;
+
 	out.unique = 0;
 	out.error = FUSE_NOTIFY_STORE;
 
@@ -2138,6 +2144,9 @@ int fuse_lowlevel_notify_retrieve(struct fuse_chan *ch, fuse_ino_t ino,
 	if (!f)
 		return -ENODEV;
 
+	if (f->conn.proto_minor < 15)
+		return -ENOSYS;
+
 	rreq = malloc(sizeof(*rreq));
 	if (rreq == NULL)
 		return -ENOMEM;