[argo-module] Add 4.19 kernel support

OXT-1616

Signed-off-by: Nicholas Tsirakis <[email protected]>

argo-linux/argo-module.c

@@ -3078,8 +3078,8 @@ static int
 allocate_fd_with_private (void *private)
 {
     int fd;
+    const char * name = "";
     struct file *f;
-    struct qstr name = { .name = "" };
     struct path path;
     struct inode *ind;
 
@@ -3091,34 +3091,42 @@ allocate_fd_with_private (void *private)
     if ( fd < 0 )
         return fd;
 
+#if ( LINUX_VERSION_CODE < KERNEL_VERSION(4,19,0) )
     path.dentry = d_alloc_pseudo(argo_mnt->mnt_sb, &name);
-    if ( unlikely(!path.dentry) )
-    {
+    if (unlikely(!path.dentry)) {
         put_unused_fd(fd);
-        return -ENOMEM;
+          return -ENOMEM;
     }
+#endif
+
     ind = new_inode(argo_mnt->mnt_sb);
     ind->i_ino = get_next_ino();
     ind->i_fop = argo_mnt->mnt_root->d_inode->i_fop;
     ind->i_state = argo_mnt->mnt_root->d_inode->i_state;
     ind->i_mode = argo_mnt->mnt_root->d_inode->i_mode;
     ind->i_uid = current_fsuid();
     ind->i_gid = current_fsgid();
+#if ( LINUX_VERSION_CODE < KERNEL_VERSION(4,19,0) )
     d_instantiate(path.dentry, ind);
-
     path.mnt = mntget(argo_mnt);
+#endif
 
     DEBUG_APPLE;
+#if ( LINUX_VERSION_CODE < KERNEL_VERSION(4,19,0) )
     f = alloc_file(&path, FMODE_READ | FMODE_WRITE, &argo_fops_stream);
+#else
+    f = alloc_file_pseudo(ind, argo_mnt, name, O_RDWR, &argo_fops_stream);
+#endif
     if ( !f )
     {
       //FIXME putback fd?
         return -ENFILE;
     }
 
     f->private_data = private;
+#if ( LINUX_VERSION_CODE < KERNEL_VERSION(4,19,0) )
     f->f_flags = O_RDWR;
- 
+#endif
     fd_install (fd, f);
 
     return fd;