CIFS: Fix fast lease break after open problem

Now we walk though cifsFileInfo's list for every incoming lease
break and look for an equivalent there. That approach misses lease
breaks that come just after an open response - we don't have time
to populate new cifsFileInfo structure to the list. Fix this by
adding new list of pending opens and look for a lease there if we
didn't find it in the list of cifsFileInfo structures.

Signed-off-by: Pavel Shilovsky <pshilovsky@etersoft.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index 4f2147c5adb6..7c0a81283645 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -382,6 +382,7 @@ cifs_atomic_open(struct inode *inode, struct dentry *direntry,
 	struct cifs_tcon *tcon;
 	struct TCP_Server_Info *server;
 	struct cifs_fid fid;
+	struct cifs_pending_open open;
 	__u32 oplock;
 	struct cifsFileInfo *file_info;
 
@@ -423,16 +424,21 @@ cifs_atomic_open(struct inode *inode, struct dentry *direntry,
 	if (server->ops->new_lease_key)
 		server->ops->new_lease_key(&fid);
 
+	cifs_add_pending_open(&fid, tlink, &open);
+
 	rc = cifs_do_create(inode, direntry, xid, tlink, oflags, mode,
 			    &oplock, &fid, opened);
 
-	if (rc)
+	if (rc) {
+		cifs_del_pending_open(&open);
 		goto out;
+	}
 
 	rc = finish_open(file, direntry, generic_file_open, opened);
 	if (rc) {
 		if (server->ops->close)
 			server->ops->close(xid, tcon, &fid);
+		cifs_del_pending_open(&open);
 		goto out;
 	}
 
@@ -440,6 +446,7 @@ cifs_atomic_open(struct inode *inode, struct dentry *direntry,
 	if (file_info == NULL) {
 		if (server->ops->close)
 			server->ops->close(xid, tcon, &fid);
+		cifs_del_pending_open(&open);
 		rc = -ENOMEM;
 	}