fs/9p/fid.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * V9FS FID Management
   4  *
   5  *  Copyright (C) 2005 by Eric Van Hensbergen <ericvh@gmail.com>
   6  */
   7 #ifndef FS_9P_FID_H
   8 #define FS_9P_FID_H
   9 #include <linux/list.h>
  10
  11 struct p9_fid *v9fs_fid_lookup(struct dentry *dentry);
  12 static inline struct p9_fid *v9fs_parent_fid(struct dentry *dentry)
  13 {
  14         return v9fs_fid_lookup(dentry->d_parent);
  15 }
  16 void v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid);
  17 struct p9_fid *v9fs_writeback_fid(struct dentry *dentry);
  18 void v9fs_open_fid_add(struct inode *inode, struct p9_fid *fid);
  19 static inline struct p9_fid *clone_fid(struct p9_fid *fid)
  20 {
  21         return IS_ERR(fid) ? fid :  p9_client_walk(fid, 0, NULL, 1);
  22 }
  23 static inline struct p9_fid *v9fs_fid_clone(struct dentry *dentry)
  24 {
  25         struct p9_fid *fid, *nfid;
  26
  27         fid = v9fs_fid_lookup(dentry);
  28         if (!fid || IS_ERR(fid))
  29                 return fid;
  30
  31         nfid = clone_fid(fid);
  32         p9_client_clunk(fid);
  33         return nfid;
  34 }
  35 #endif