cifs: add refcounted and timestamped container for holding tcons
Eventually, we'll need to track the use of tcons on a per-sb basis, so that
we know when it's ok to tear them down. Begin this conversion by adding a
new "tcon_link" struct and accessors that get it. For now, the core data
structures are untouched -- cifs_sb still just points to a single tcon and
the pointers are just cast to deal with the accessor functions. A later
patch will flesh this out.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index de046e1..1e375abc 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -224,6 +224,7 @@
__u32 oplock;
struct cifs_sb_info *cifs_sb;
struct cifsTconInfo *tcon;
+ struct tcon_link *tlink;
struct cifsFileInfo *pCifsFile = NULL;
struct cifsInodeInfo *pCifsInode;
char *full_path = NULL;
@@ -235,7 +236,12 @@
xid = GetXid();
cifs_sb = CIFS_SB(inode->i_sb);
- tcon = cifs_sb_tcon(cifs_sb);
+ tlink = cifs_sb_tlink(cifs_sb);
+ if (IS_ERR(tlink)) {
+ FreeXid(xid);
+ return PTR_ERR(tlink);
+ }
+ tcon = tlink_tcon(tlink);
pCifsInode = CIFS_I(file->f_path.dentry->d_inode);
@@ -402,6 +408,7 @@
kfree(buf);
kfree(full_path);
FreeXid(xid);
+ cifs_put_tlink(tlink);
return rc;
}