[O_TMPFILE] it's still short a few helpers, but infrastructure should be OK now...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 16 insertions, 0 deletions

diff --git a/fs/dcache.c b/fs/dcache.c
index f09b9085f7d8..b7f049c31526 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -2968,6 +2968,22 @@ rename_retry:
         goto again;
 }
 
+void d_tmpfile(struct dentry *dentry, struct inode *inode)
+{
+        inode_dec_link_count(inode);
+        BUG_ON(dentry->d_name.name != dentry->d_iname ||
+                !hlist_unhashed(&dentry->d_alias) ||
+                !d_unlinked(dentry));
+        spin_lock(&dentry->d_parent->d_lock);
+        spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED);
+        dentry->d_name.len = sprintf(dentry->d_iname, "#%llu",
+                                (unsigned long long)inode->i_ino);
+        spin_unlock(&dentry->d_lock);
+        spin_unlock(&dentry->d_parent->d_lock);
+        d_instantiate(dentry, inode);
+}
+EXPORT_SYMBOL(d_tmpfile);
+
 /**
  * find_inode_number - check for dentry with name
  * @dir: directory to check