vfs: export new_inode_pseudo

Ceph needs to be able to allocate inodes ahead of a create that might
involve a fscrypt-encrypted inode. new_inode() almost fits the bill,
but it puts the inode on the sb->s_inodes list and when we go to hash
it, that might be done again.

We could work around that by setting I_CREATING on the new inode, but
that causes ilookup5 to return -ESTALE if something tries to find it
before I_NEW is cleared. This is desirable behavior for most
filesystems, but doesn't work for ceph.

To work around all of this, just use new_inode_pseudo which doesn't add
it to the sb->s_inodes list.

Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Jeff Layton <jlayton@kernel.org>

diff --git a/fs/inode.c b/fs/inode.c
index 6b80a51129d56f4175326e1faf1429e4f730f8b9..7fd85501bb32bebb145d9a5a9f23c53380c48072 100644 (file)
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -951,6 +951,7 @@ struct inode *new_inode_pseudo(struct super_block *sb)
        }
        return inode;
 }
+EXPORT_SYMBOL(new_inode_pseudo);
 
 /**
  *     new_inode       - obtain an inode