ensure async_aio is enabled if capable

libfuse/include/fuse_common.h

@@ -112,6 +112,7 @@ struct fuse_file_info {
 #define FUSE_CAP_SPLICE_READ	(1 << 9)
 #define FUSE_CAP_FLOCK_LOCKS	(1 << 10)
 #define FUSE_CAP_IOCTL_DIR	(1 << 11)
+#define FUSE_CAP_ASYNC_DIO      (1 << 15)
 #define FUSE_CAP_POSIX_ACL      (1 << 19)
 
 

libfuse/lib/fuse_lowlevel.c

@@ -1797,6 +1797,8 @@ static void do_init(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 			f->conn.capable |= FUSE_CAP_FLOCK_LOCKS;
                 if (arg->flags & FUSE_POSIX_ACL)
                         f->conn.capable |= FUSE_CAP_POSIX_ACL;
+                if (arg->flags & FUSE_ASYNC_DIO)
+                        f->conn.capable |= FUSE_CAP_ASYNC_DIO;
 	} else {
 		f->conn.async_read = 0;
 		f->conn.max_readahead = 0;
@@ -1865,6 +1867,8 @@ static void do_init(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 		outarg.flags |= FUSE_FLOCK_LOCKS;
         if (f->conn.want & FUSE_CAP_POSIX_ACL)
                 outarg.flags |= FUSE_POSIX_ACL;
+        if (f->conn.want & FUSE_CAP_ASYNC_DIO)
+                outarg.flags |= FUSE_ASYNC_DIO;
 	outarg.max_readahead = f->conn.max_readahead;
 	outarg.max_write = f->conn.max_write;
 	if (f->conn.proto_minor >= 13) {

src/fuse_init.cpp

@@ -42,6 +42,7 @@ namespace FUSE
     l::want_if_capable(conn_,FUSE_CAP_BIG_WRITES);
     l::want_if_capable(conn_,FUSE_CAP_DONT_MASK);
     l::want_if_capable(conn_,FUSE_CAP_IOCTL_DIR);
+    l::want_if_capable(conn_,FUSE_CAP_ASYNC_DIO);
     if(Config::get().posix_acl)
       l::want_if_capable(conn_,FUSE_CAP_POSIX_ACL);