fix create/open/lookup to use namei intent flags. Enable oplock and packet signing

fs/cifs/CHANGES

+Version 0.84
+------------
+Finish support for Linux 2.5 open/create changes, which removes the
+redundant NTCreate/QPathInfo/close that was sent during file create.
+Enable oplock by default. Enable packet signing by default (needed to 
+access many recent Windows servers)
+
 Version 0.83
 ------------
 Fix oops when mounting to long server names caused by inverted parms to kmalloc.

fs/cifs/README

@@ -150,7 +150,10 @@ Configuration pseudo-files:
 			point and if the uids user/password mapping
 			information is available. (default is 0)
   PacketSigningEnabled  If set to one, cifs packet signing is enabled
-			(default 0)
+			and will be used if the server requires 
+			it.  If set to two, cifs packet signing is
+			required even if the server considers packet
+			signing optional. (default 1)
   cifsFYI		If set to one, additional debug information is
 			logged to the system error log. (default 0)
   ExtendedSecurity	If set to one, SPNEGO session establishment
@@ -166,6 +169,7 @@ Configuration pseudo-files:
 			for one second improving performance of lookups
 			(default 1)
   OplockEnabled		If set to one, safe distributed caching enabled.
+			(default 1)
 
 These experimental features and tracing can be enabled by changing flags in /proc/fs/cifs
 (after the cifs module has been installed or built into the kernel, e.g. insmod cifs). 

fs/cifs/cifsfs.c

@@ -47,12 +47,12 @@ extern struct file_system_type cifs_fs_type;
 int cifsFYI = 0;
 int cifsERROR = 1;
 int traceSMB = 0;
-unsigned int oplockEnabled = 0;
+unsigned int oplockEnabled = 1;
 unsigned int lookupCacheEnabled = 1;
 unsigned int multiuser_mount = 0;
 unsigned int extended_security = 0;
 unsigned int ntlmv2_support = 0;
-unsigned int sign_CIFS_PDUs = 0;
+unsigned int sign_CIFS_PDUs = 1;
 unsigned int CIFSMaximumBufferSize = CIFS_MAX_MSGSIZE;
 struct task_struct * oplockThread = NULL;
 
@@ -439,7 +439,6 @@ static int cifs_oplock_thread(void * dummyarg)
 	struct list_head * tmp;
 	struct list_head * tmp1;
 	struct oplock_q_entry * oplock_item;
-	struct file * pfile;
 	struct cifsTconInfo *pTcon;
 	int rc;
 
@@ -457,23 +456,19 @@ static int cifs_oplock_thread(void * dummyarg)
 							       qhead);
 			if(oplock_item) {
 				pTcon = oplock_item->tcon;
-				pfile = oplock_item->file_to_flush;
-				cFYI(1,("process item on queue"));/* BB remove */
 				DeleteOplockQEntry(oplock_item);
 				write_unlock(&GlobalMid_Lock);
-				rc = filemap_fdatawrite(pfile->f_dentry->d_inode->i_mapping);
+				rc = filemap_fdatawrite(oplock_item->pinode->i_mapping);
 				if(rc)
-					CIFS_I(pfile->f_dentry->d_inode)->write_behind_rc 
+					CIFS_I(oplock_item->pinode)->write_behind_rc 
 						= rc;
-				cFYI(1,("Oplock flush file %p rc %d",pfile,rc));
-				if(pfile->private_data) {
-					rc = CIFSSMBLock(0, pTcon, 
-						((struct cifsFileInfo *) pfile->private_data)->netfid,
-						0 /* len */ , 0 /* offset */, 0, 
-						0, LOCKING_ANDX_OPLOCK_RELEASE,
-						0 /* wait flag */);
-					cFYI(1,("Oplock release rc = %d ",rc));
-				}
+				cFYI(1,("Oplock flush inode %p rc %d",oplock_item->pinode,rc));
+				rc = CIFSSMBLock(0, pTcon, 
+					oplock_item->netfid,
+					0 /* len */ , 0 /* offset */, 0, 
+					0, LOCKING_ANDX_OPLOCK_RELEASE,
+					0 /* wait flag */);
+				cFYI(1,("Oplock release rc = %d ",rc));
 				write_lock(&GlobalMid_Lock);
 			} else
 				break;

fs/cifs/misc.c

@@ -390,12 +390,12 @@ is_valid_oplock_break(struct smb_hdr *buf)
 					read_unlock(&GlobalSMBSeslock);
 					cFYI(1,("Matching file id, processing oplock break"));
 					pCifsInode = 
-						CIFS_I(netfile->pfile->f_dentry->d_inode);
+						CIFS_I(netfile->pInode);
 					pCifsInode->clientCanCacheAll = FALSE;
 					if(pSMB->OplockLevel == 0)
 						pCifsInode->clientCanCacheRead = FALSE;
 					pCifsInode->oplockPending = TRUE;
-					AllocOplockQEntry(netfile->pfile, tcon);
+					AllocOplockQEntry(netfile->pInode, netfile->netfid, tcon);
 					cFYI(1,("about to wake up oplock thd"));
 					wake_up_process(oplockThread);               
 					return TRUE;

fs/cifs/transport.c

@@ -101,10 +101,10 @@ DeleteMidQEntry(struct mid_q_entry *midEntry)
 }
 
 struct oplock_q_entry *
-AllocOplockQEntry(struct file * file, struct cifsTconInfo * tcon)
+AllocOplockQEntry(struct inode * pinode, __u16 fid, struct cifsTconInfo * tcon)
 {
 	struct oplock_q_entry *temp;
-	if ((file == NULL) || (tcon == NULL)) {
+	if ((pinode== NULL) || (tcon == NULL)) {
 		cERROR(1, ("Null parms passed to AllocOplockQEntry"));
 		return NULL;
 	}
@@ -113,8 +113,9 @@ AllocOplockQEntry(struct file * file, struct cifsTconInfo * tcon)
 	if (temp == NULL)
 		return temp;
 	else {
-		temp->file_to_flush = file;
+		temp->pinode = pinode;
 		temp->tcon = tcon;
+		temp->netfid = fid;
 		write_lock(&GlobalMid_Lock);
 		list_add_tail(&temp->qhead, &GlobalOplock_Q);
 		write_unlock(&GlobalMid_Lock);