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 fs/overlayfs/dir.c | 41 +++++++++++++++++++++++++++++------------ 1 file changed, 29 insertions(+), 12 deletions(-) -- 2.6.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
