[CIFS] Change Notify support part 1 - add dnotify thread for processing

notify responses.

Signed-off-by: Asser Ferno  <asser@diku.dk>
Signed-off-by: Steve French <sfrench@us.ibm.com>

diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 7fda0f7..d77abe2 100644 (file)
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -59,6 +59,8 @@ unsigned int ntlmv2_support = 0;
 unsigned int sign_CIFS_PDUs = 1;
 extern struct task_struct * oplockThread; /* remove sparse warning */
 struct task_struct * oplockThread = NULL;
+extern struct task_struct * dnotifyThread; /* remove sparse warning */
+struct task_struct * dnotifyThread = NULL;
 unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
 module_param(CIFSMaxBufSize, int, 0);
 MODULE_PARM_DESC(CIFSMaxBufSize,"Network buffer size (not including header). Default: 16384 Range: 8192 to 130048");
@@ -73,6 +75,7 @@ module_param(cifs_max_pending, int, 0);
 MODULE_PARM_DESC(cifs_max_pending,"Simultaneous requests to server. Default: 50 Range: 2 to 256");
 
 static DECLARE_COMPLETION(cifs_oplock_exited);
+static DECLARE_COMPLETION(cifs_dnotify_exited);
 
 extern mempool_t *cifs_sm_req_poolp;
 extern mempool_t *cifs_req_poolp;
@@ -838,6 +841,19 @@ static int cifs_oplock_thread(void * dummyarg)
        complete_and_exit (&cifs_oplock_exited, 0);
 }
 
+static int cifs_dnotify_thread(void * dummyarg)
+{
+       daemonize("cifsdnotifyd");
+       allow_signal(SIGTERM);
+
+       dnotifyThread = current;
+       do {
+               set_current_state(TASK_INTERRUPTIBLE);
+               schedule_timeout(39*HZ);
+       } while(!signal_pending(current));
+       complete_and_exit (&cifs_dnotify_exited, 0);
+}
+
 static int __init
 init_cifs(void)
 {
@@ -884,10 +900,16 @@ init_cifs(void)
                                if (!rc) {                
                                        rc = (int)kernel_thread(cifs_oplock_thread, NULL, 
                                                CLONE_FS | CLONE_FILES | CLONE_VM);
-                                       if(rc > 0)
-                                               return 0;
-                                       else 
+                                       if(rc > 0) {
+                                               rc = (int)kernel_thread(cifs_dnotify_thread, NULL,
+                                                       CLONE_FS | CLONE_FILES | CLONE_VM);
+                                               if(rc > 0)
+                                                       return 0;
+                                               else
+                                                       cERROR(1,("error %d create dnotify thread", rc));
+                                       } else {
                                                cERROR(1,("error %d create oplock thread",rc));
+                                       }
                                }
                                cifs_destroy_request_bufs();
                        }
@@ -916,6 +938,10 @@ exit_cifs(void)
                send_sig(SIGTERM, oplockThread, 1);
                wait_for_completion(&cifs_oplock_exited);
        }
+       if(dnotifyThread) {
+               send_sig(SIGTERM, dnotifyThread, 1);
+               wait_for_completion(&cifs_dnotify_exited);
+       }
 }
 
 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");