[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

3 files changed, 34 insertions, 0 deletions

diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 9a3c85bdd77e..92fba7609e67 100644
--- a/fs/cifs/cifsglob.h
+++ b/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
  */
diff --git a/fs/cifs/cifspdu.h b/fs/cifs/cifspdu.h
index 42c16cf32284..026c88f486a2 100644
--- a/fs/cifs/cifspdu.h
+++ b/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 */
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 698cdcebca04..36d45b1dffc2 100644
--- a/fs/cifs/cifssmb.c
+++ b/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;