[CIFS] Fix umount --force to wake up the pending response queue, not just

the request queue. Also periodically wakeup response_q so threads can
check if stuck requests have timed out. Workaround Windows server illegal smb
length on transact2 findfirst response.

Signed-off-by: Steve French <sfrench@us.ibm.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index d179b0c3eee4..6867e556d37e 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -90,6 +90,18 @@ small_smb_init(int smb_command, int wct, struct cifsTconInfo *tcon,
            check for tcp and smb session status done differently
            for those three - in the calling routine */
         if(tcon) {
+                if(tcon->tidStatus == CifsExiting) {
+                        /* only tree disconnect, open, and write,
+                        (and ulogoff which does not have tcon)
+                        are allowed as we start force umount */
+                        if((smb_command != SMB_COM_WRITE_ANDX) && 
+                           (smb_command != SMB_COM_OPEN_ANDX) && 
+                           (smb_command != SMB_COM_TREE_DISCONNECT)) {
+                                cFYI(1,("can not send cmd %d while umounting",
+                                        smb_command));
+                                return -ENODEV;
+                        }
+                }
                 if((tcon->ses) && (tcon->ses->status != CifsExiting) &&
                                   (tcon->ses->server)){
                         struct nls_table *nls_codepage;
@@ -187,6 +199,19 @@ smb_init(int smb_command, int wct, struct cifsTconInfo *tcon,
            check for tcp and smb session status done differently
            for those three - in the calling routine */
         if(tcon) {
+                if(tcon->tidStatus == CifsExiting) {
+                        /* only tree disconnect, open, and write,
+                          (and ulogoff which does not have tcon)
+                          are allowed as we start force umount */
+                        if((smb_command != SMB_COM_WRITE_ANDX) &&
+                           (smb_command != SMB_COM_OPEN_ANDX) &&
+                           (smb_command != SMB_COM_TREE_DISCONNECT)) {
+                                cFYI(1,("can not send cmd %d while umounting",
+                                        smb_command));
+                                return -ENODEV;
+                        }
+                }
+
                 if((tcon->ses) && (tcon->ses->status != CifsExiting) && 
                                   (tcon->ses->server)){
                         struct nls_table *nls_codepage;