Fix scheduling while atomic problem in getting attributes of newly created...

Fix scheduling while atomic problem in getting attributes of newly created file.  Fix truncate of existing file when O_CREAT but not O_TRUNC specified.

fs/cifs/CHANGES

+Version 0.90
+------------
+Fix scheduling while atomic error in getting inode info on newly created file. Fix truncate of existing files
+opened with O_CREAT set but O_TRUNC not set.
+
 Version 0.89
 ------------
 Fix oops on write to dead tcp session. Remove error log write for case when file open

fs/cifs/dir.c

@@ -134,6 +134,7 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
 	struct inode *newinode = NULL;
 	struct cifsFileInfo * pCifsFile = NULL;
 	struct cifsInodeInfo * pCifsInode;
+	int disposition = FILE_OVERWRITE_IF;
 
 	xid = GetXid();
 
@@ -151,6 +152,16 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
 			desiredAccess = GENERIC_WRITE;
 		else if ((nd->intent.open.flags & O_ACCMODE) == O_RDWR)
 			desiredAccess = GENERIC_ALL;
+
+		if((nd->intent.open.flags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
+			disposition = FILE_CREATE;
+		else if((nd->intent.open.flags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC))
+			disposition = FILE_OVERWRITE_IF;
+		else if((nd->intent.open.flags & O_CREAT) == O_CREAT)
+			disposition = FILE_OPEN_IF;
+		else {
+			cFYI(1,("Create flag not set in create function"));
+		}
 	}
 
 	/* BB add processing to set equivalent of mode - e.g. via CreateX with ACLs */
@@ -158,7 +169,7 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
 		oplock = REQ_OPLOCK;
 
 	buf = kmalloc(sizeof(FILE_ALL_INFO),GFP_KERNEL);
-	rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OVERWRITE_IF,
+	rc = CIFSSMBOpen(xid, pTcon, full_path, disposition,
 			 desiredAccess, CREATE_NOT_DIR,
 			 &fileHandle, &oplock, buf, cifs_sb->local_nls);
 	if (rc) {
@@ -297,6 +308,9 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, struct name
 	     (" parent inode = 0x%p name is: %s and dentry = 0x%p",
 	      parent_dir_inode, direntry->d_name.name, direntry));
 
+	if(nd) {  /* BB removeme */
+		cFYI(1,("In lookup nd flags 0x%x open intent flags 0x%x",nd->flags,nd->intent.open.flags));
+	} /* BB removeme BB */
 	/* BB Add check of incoming data - e.g. frame not longer than maximum SMB - let server check the namelen BB */
 
 	/* check whether path exists */

fs/cifs/file.c

@@ -144,6 +144,10 @@ cifs_open(struct inode *inode, struct file *file)
 			list_add(&pCifsFile->tlist,&pTcon->openFileList);
 			pCifsInode = CIFS_I(file->f_dentry->d_inode);
 			if(pCifsInode) {
+				list_add(&pCifsFile->flist,&pCifsInode->openFileList);
+				write_unlock(&GlobalSMBSeslock);
+				write_unlock(&file->f_owner.lock);
+
 		                if (pTcon->ses->capabilities & CAP_UNIX)
 					rc = cifs_get_inode_info_unix(&file->f_dentry->d_inode,
 						full_path, inode->i_sb);
@@ -151,16 +155,16 @@ cifs_open(struct inode *inode, struct file *file)
 					rc = cifs_get_inode_info(&file->f_dentry->d_inode,
 						full_path, buf, inode->i_sb);
 
-				list_add(&pCifsFile->flist,&pCifsInode->openFileList);
 				if(oplock == OPLOCK_EXCLUSIVE) {
 					pCifsInode->clientCanCacheAll = TRUE;
 					pCifsInode->clientCanCacheRead = TRUE;
 					cFYI(1,("Exclusive Oplock granted on inode %p",file->f_dentry->d_inode));
 				} else if(oplock == OPLOCK_READ)
 					pCifsInode->clientCanCacheRead = TRUE;
+			} else {
+				write_unlock(&GlobalSMBSeslock);
+				write_unlock(&file->f_owner.lock);
 			}
-			write_unlock(&GlobalSMBSeslock);
-			write_unlock(&file->f_owner.lock);
 			if(file->f_flags & O_CREAT) {           
 				/* time to set mode which we can not set earlier due
 				 to problems creating new read-only files */