d_drop or check_submounts_and_drop called from d_revalidate can result in renamed directories with child dentries being unhashed. These renamed and drop directory dentries can be rehashed after d_materialise_unique uses d_find_alias to find them. Reviewed-by: Miklos Szeredi <miklos@xxxxxxxxxx> Signed-off-by: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx> --- fs/dcache.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/fs/dcache.c b/fs/dcache.c index 265e0ce9769c..c71c86f7780e 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -726,7 +726,8 @@ EXPORT_SYMBOL(dget_parent); * acquire the reference to alias and return it. Otherwise return NULL. * Notice that if inode is a directory there can be only one alias and * it can be unhashed only if it has no children, or if it is the root - * of a filesystem. + * of a filesystem, or if the directory was renamed and d_revalidate + * was the first vfs operation to notice. * * If the inode has an IS_ROOT, DCACHE_DISCONNECTED alias, then prefer * any other hashed alias over that one unless @want_discon is set, -- 1.7.5.4 -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
