vfs_default: add sync fallback to pwrite_send/recv

Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>

diff --git a/source3/modules/vfs_default.c b/source3/modules/vfs_default.c
index 4ca7578cc538b75d0f940d160ac2b5e3b7056175..57ce0b465ece72b5dd49f5fb1759cad9f6481c5a 100644 (file)
--- a/source3/modules/vfs_default.c
+++ b/source3/modules/vfs_default.c
@@ -870,8 +870,18 @@ static void vfs_pwrite_done(struct tevent_req *subreq)
        TALLOC_FREE(subreq);
        SMBPROFILE_BYTES_ASYNC_END(state->profile_bytes);
        talloc_set_destructor(state, NULL);
-       if (tevent_req_error(req, ret)) {
-               return;
+       if (ret != 0) {
+               if (ret != EAGAIN) {
+                       tevent_req_error(req, ret);
+                       return;
+               }
+               /*
+                * If we get EAGAIN from pthreadpool_tevent_job_recv() this
+                * means the lower level pthreadpool failed to create a new
+                * thread. Fallback to sync processing in that case to allow
+                * some progress for the client.
+                */
+               vfs_pwrite_do(state);
        }
 
        tevent_req_done(req);