[CIFS] Change notify support part 2

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

fs/cifs/cifsglob.h

@@ -391,6 +391,20 @@ struct oplock_q_entry {
 	__u16 netfid;
 };
 
+/* for pending dnotify requests */
+struct dir_notify_req {
+       struct list_head lhead;
+       __le16 Pid;
+       __le16 PidHigh;
+       __u16 Mid;
+       __u16 Tid;
+       __u16 Uid;
+       __u16 netfid;
+       __u32 filter; /* CompletionFilter (for multishot) */
+       int multishot;
+       struct dentry * dentry;
+};
+
 #define   MID_FREE 0
 #define   MID_REQUEST_ALLOCATED 1
 #define   MID_REQUEST_SUBMITTED 2
@@ -459,6 +473,9 @@ GLOBAL_EXTERN rwlock_t GlobalSMBSeslock;  /* protects list inserts on 3 above */
 
 GLOBAL_EXTERN struct list_head GlobalOplock_Q;
 
+GLOBAL_EXTERN struct list_head GlobalDnotifyReqList; /* Outstanding dir notify requests */
+GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q; /* Dir notify response queue */
+
 /*
  * Global transaction id (XID) information
  */

fs/cifs/cifspdu.h

@@ -53,6 +53,7 @@
 #define SMB_COM_NT_TRANSACT           0xA0
 #define SMB_COM_NT_TRANSACT_SECONDARY 0xA1
 #define SMB_COM_NT_CREATE_ANDX        0xA2
+#define SMB_COM_NT_CANCEL             0xA4 /* no response */
 #define SMB_COM_NT_RENAME             0xA5 /* trivial response */
 
 /* Transact2 subcommand codes */

fs/cifs/cifssmb.c

@@ -4015,6 +4015,22 @@ int CIFSSMBNotify(const int xid, struct cifsTconInfo *tcon,
 			(struct smb_hdr *) pSMBr, &bytes_returned, -1);
 	if (rc) {
 		cFYI(1, ("Error in Notify = %d", rc));
+	} else {
+		/* Add file to outstanding requests */
+		dnotify_req = (struct dir_notify_req *) kmalloc(
+						sizeof(struct dir_notify_req), GFP_KERNEL);
+		dnotify_req->Pid = pSMB->hdr.Pid;
+		dnotify_req->PidHigh = pSMB->hdr.PidHigh;
+		dnotify_req->Mid = pSMB->hdr.Mid;
+		dnotify_req->Tid = pSMB->hdr.Tid;
+		dnotify_req->Uid = pSMB->hdr.Uid;
+		dnotify_req->netfid = netfid;
+		dnotify_req->dentry = dentry;
+		dnotify_req->filter = filter;
+		dnotify_req->multishot = multishot;
+		spin_lock(&GlobalMid_Lock);
+		list_add_tail(&dnotify_req->lhead, &GlobalDnotifyReqList);
+		spin_unlock(&GlobalMid_Lock);
 	}
 	cifs_buf_release(pSMB);
 	return rc;