Messages in this thread | | | Date | Mon, 7 Mar 2016 11:49:31 +0100 | Subject | Re: [PATCH 0/2] Fix hardlinks in overlay | From | Miklos Szeredi <> |
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On Fri, Oct 9, 2015 at 9:34 PM, Alexander Morozov <alexandr.morozov@docker.com> wrote: > There were reports that overlay doesn't work very well with unix-sockets. > In particular you can't access unix-socket through hardlink on overlay fs. > Problem is that overlay creates different inodes for hardlinks and code in > net/unix/af_unix.c relies on inodes for unix-socket lookup. I think this > affects any code which relies on inodes from kern_path. There is helper > d_backing_inode, which I think supposed to get inodes from underlying fs > (for example ext4), but in current implementation it does nothing. These > patches made on top of v4.3-rc4 of main linux tree (master is broken for my > ubuntu VM), but I tested that they applying on master and there was no > changes to overlay since v4.3-rc4. > > Alexander Morozov (2): > fs/overlay: move update and instantiate dentry code to function > fs/overlay: use same inodes for hardlinks
Problem is with lookup: how do we go from backing dentry to overlayfs dentry so the inode can be shared?
Thanks, Miklos
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