From 1b404f49e94fb35fa6c9b0f8d2342d1a9b1f9a53 Mon Sep 17 00:00:00 2001 From: Daniel Rosenberg Date: Thu, 11 Feb 2016 16:44:15 -0800 Subject: vfs: add d_canonical_path for stacked filesystem support Inotify does not currently know when a filesystem is acting as a wrapper around another fs. This means that inotify watchers will miss any modifications to the base file, as well as any made in a separate stacked fs that points to the same file. d_canonical_path solves this problem by allowing the fs to map a dentry to a path in the lower fs. Inotify can use it to find the appropriate place to watch to be informed of all changes to a file. Change-Id: I09563baffad1711a045e45c1bd0bd8713c2cc0b6 Signed-off-by: Daniel Rosenberg --- include/linux/dcache.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/dcache.h b/include/linux/dcache.h index c1999d1fe..00eaec48c 100644 --- a/include/linux/dcache.h +++ b/include/linux/dcache.h @@ -158,6 +158,7 @@ struct dentry_operations { char *(*d_dname)(struct dentry *, char *, int); struct vfsmount *(*d_automount)(struct path *); int (*d_manage)(struct dentry *, bool); + void (*d_canonical_path)(const struct dentry *, struct path *); } ____cacheline_aligned; /* -- cgit v1.2.3