From: Dr. David Alan Gilbert <dgilbert@redhat.com>
Date: Thu, 22 Nov 2018 16:05:09 +0000 (+0000)
Subject: virtiofsd: Handle hard reboot
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=e8556f49098b5d95634e592d79a97f761b76c96e;p=qemu.git

virtiofsd: Handle hard reboot

Handle a
  mount
  hard reboot (without unmount)
  mount

we get another 'init' which FUSE doesn't normally expect.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
---

diff --git a/tools/virtiofsd/fuse_lowlevel.c b/tools/virtiofsd/fuse_lowlevel.c
index 7d742b5a72..65f91dabae 100644
--- a/tools/virtiofsd/fuse_lowlevel.c
+++ b/tools/virtiofsd/fuse_lowlevel.c
@@ -2433,7 +2433,21 @@ void fuse_session_process_buf_int(struct fuse_session *se,
             goto reply_err;
         }
     } else if (in->opcode == FUSE_INIT || in->opcode == CUSE_INIT) {
-        goto reply_err;
+        if (fuse_lowlevel_is_virtio(se)) {
+            /*
+             * TODO: This is after a hard reboot typically, we need to do
+             * a destroy, but we can't reply to this request yet so
+             * we can't use do_destroy
+             */
+            fuse_log(FUSE_LOG_DEBUG, "%s: reinit\n", __func__);
+            se->got_destroy = 1;
+            se->got_init = 0;
+            if (se->op.destroy) {
+                se->op.destroy(se->userdata);
+            }
+        } else {
+            goto reply_err;
+        }
     }
 
     err = EACCES;