For example fuse root dentry has no dentry operations. Signed-off-by: Konstantin Khlebnikov <koct9i@xxxxxxxxx> Fixes: 7c03b5d45b8e ("ovl: allow distributed fs as lower layer") --- fs/overlayfs/super.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c index 1a354840f262..7a236865d56c 100644 --- a/fs/overlayfs/super.c +++ b/fs/overlayfs/super.c @@ -365,6 +365,14 @@ static bool ovl_dentry_remote(struct dentry *dentry) (DCACHE_OP_REVALIDATE | DCACHE_OP_WEAK_REVALIDATE); } +static bool ovl_path_remote(const struct path *path) +{ + const struct dentry_operations *d_op = path->dentry->d_sb->s_d_op; + + return ovl_dentry_remote(path->dentry) || + (d_op && (d_op->d_revalidate || d_op->d_weak_revalidate)); +} + static bool ovl_dentry_weird(struct dentry *dentry) { return dentry->d_flags & (DCACHE_NEED_AUTOMOUNT | @@ -837,7 +845,7 @@ static int ovl_mount_dir(const char *name, struct path *path) err = ovl_mount_dir_noesc(tmp, path); if (!err) - if (ovl_dentry_remote(path->dentry)) { + if (ovl_path_remote(path)) { pr_err("overlayfs: filesystem on '%s' not supported as upperdir\n", tmp); path_put(path); @@ -866,7 +874,7 @@ static int ovl_lower_dir(const char *name, struct path *path, long *namelen, *namelen = max(*namelen, statfs.f_namelen); *stack_depth = max(*stack_depth, path->mnt->mnt_sb->s_stack_depth); - if (ovl_dentry_remote(path->dentry)) + if (ovl_path_remote(path)) *remote = true; return 0; -- To unsubscribe from this list: send the line "unsubscribe linux-unionfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html