fs: anon_inodes implement dname

Add a d_dname method for anon_inodes filesystem, the same way pipefs and sockfs pseudo filesystems. This allows us to remove the DCACHE_UNHASHED hack from anon_inodes.c (see next patch). [AV: inumber is useless here, dropped from anon_inodefs_dname()] Signed-off-by: Nick Piggin <[email protected]> Cc: Miklos Szeredi <[email protected]> Cc: Davide Libenzi <[email protected]> Cc: "David S. Miller" <[email protected]> Cc: Jens Axboe <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: Al Viro <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Al Viro <[email protected]>
vieko · Dec 17, 2009 · b9aff02 · b9aff02
1 parent 06777d3
commit b9aff02
Showing 1 changed file with 10 additions and 0 deletions.
diff --git a/fs/anon_inodes.c b/fs/anon_inodes.c
@@ -45,13 +45,23 @@ static int anon_inodefs_delete_dentry(struct dentry *dentry)
 	return 1;
 }
 
+/*
+ * anon_inodefs_dname() is called from d_path().
+ */
+static char *anon_inodefs_dname(struct dentry *dentry, char *buffer, int buflen)
+{
+	return dynamic_dname(dentry, buffer, buflen, "anon_inode:%s",
+				dentry->d_name.name);
+}
+
 static struct file_system_type anon_inode_fs_type = {
 	.name		= "anon_inodefs",
 	.get_sb		= anon_inodefs_get_sb,
 	.kill_sb	= kill_anon_super,
 };
 static const struct dentry_operations anon_inodefs_dentry_operations = {
 	.d_delete	= anon_inodefs_delete_dentry,
+	.d_dname	= anon_inodefs_dname,
 };
 
 /*