fuse: add flag fc->initialized

Existing flag fc->blocked is used to suspend request allocation both in case
of many background request submitted and period of time before init_reply
arrives from userspace. Next patch will skip blocking allocations of
synchronous request (disregarding fc->blocked). This is mostly OK, but
we still need to suspend allocations if init_reply is not arrived yet. The
patch introduces flag fc->initialized which will serve this purpose.

Signed-off-by: Maxim Patlasov <mpatlasov@parallels.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>

1 files changed, 3 insertions, 0 deletions

diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index e26607df93df..4958f8099f16 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -363,6 +363,7 @@ void fuse_conn_kill(struct fuse_conn *fc)
         spin_lock(&fc->lock);
         fc->connected = 0;
         fc->blocked = 0;
+        fc->initialized = 1;
         spin_unlock(&fc->lock);
         /* Flush all readers on this fs */
         kill_fasync(&fc->fasync, SIGIO, POLL_IN);
@@ -583,6 +584,7 @@ void fuse_conn_init(struct fuse_conn *fc)
         fc->polled_files = RB_ROOT;
         fc->reqctr = 0;
         fc->blocked = 1;
+        fc->initialized = 0;
         fc->attr_version = 1;
         get_random_bytes(&fc->scramble_key, sizeof(fc->scramble_key));
 }
@@ -882,6 +884,7 @@ static void process_init_reply(struct fuse_conn *fc, struct fuse_req *req)
                 fc->conn_init = 1;
         }
         fc->blocked = 0;
+        fc->initialized = 1;
         wake_up_all(&fc->blocked_waitq);
 }