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- From 1c8a47df36d72ace8cf78eb6c228aa0f8027d3c2 Mon Sep 17 00:00:00 2001
- From: Miklos Szeredi <miklos@szeredi.hu>
- Date: Mon, 12 Oct 2015 15:56:20 +0200
- Subject: ovl: fix open in stacked overlay
- If two overlayfs filesystems are stacked on top of each other, then we need
- recursion in ovl_d_select_inode().
- I guess d_backing_inode() is supposed to do that. But currently it doesn't
- and that functionality is open coded in vfs_open(). This is now copied
- into ovl_d_select_inode() to fix this regression.
- Reported-by: Alban Crequy <alban.crequy@gmail.com>
- Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>
- Fixes: 4bacc9c9234c ("overlayfs: Make f_path always point to the overlay...")
- Cc: David Howells <dhowells@redhat.com>
- Cc: <stable@vger.kernel.org> # v4.2+
- ---
- fs/overlayfs/inode.c | 3 +++
- 1 file changed, 3 insertions(+)
- --- a/fs/overlayfs/inode.c
- +++ b/fs/overlayfs/inode.c
- @@ -383,6 +383,9 @@ struct inode *ovl_d_select_inode(struct
- ovl_path_upper(dentry, &realpath);
- }
-
- + if (realpath.dentry->d_flags & DCACHE_OP_SELECT_INODE)
- + return realpath.dentry->d_op->d_select_inode(realpath.dentry, file_flags);
- +
- return d_backing_inode(realpath.dentry);
- }
-
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