34 	struct ovl_fs *ofs = OVL_FS(d->sb);  in ovl_check_redirect()  local
36 	buf = ovl_get_redirect_xattr(ofs, path, prelen + strlen(post));  in ovl_check_redirect()
109 static struct ovl_fh *ovl_get_fh(struct ovl_fs *ofs, struct dentry *upperdentry,  in ovl_get_fh()  argument
115 	res = ovl_getxattr_upper(ofs, upperdentry, ox, NULL, 0);  in ovl_get_fh()
129 	res = ovl_getxattr_upper(ofs, upperdentry, ox, fh->buf, res);  in ovl_get_fh()
154 struct dentry *ovl_decode_real_fh(struct ovl_fs *ofs, struct ovl_fh *fh,  in ovl_decode_real_fh()  argument
168 	if (ofs->config.uuid ? !uuid_equal(&fh->fb.uuid, &mnt->mnt_sb->s_uuid) :  in ovl_decode_real_fh()
197 static bool ovl_is_opaquedir(struct ovl_fs *ofs, const struct path *path)  in ovl_is_opaquedir()  argument
199 	return ovl_path_check_dir_xattr(ofs, path, OVL_XATTR_OPAQUE);  in ovl_is_opaquedir()
353 int ovl_check_origin_fh(struct ovl_fs *ofs, struct ovl_fh *fh, bool connected,  in ovl_check_origin_fh()  argument
359 	for (i = 1; i < ofs->numlayer; i++) {  in ovl_check_origin_fh()
364 		if (ofs->layers[i].fsid &&  in ovl_check_origin_fh()
365 		    ofs->layers[i].fs->bad_uuid)  in ovl_check_origin_fh()
368 		origin = ovl_decode_real_fh(ofs, fh, ofs->layers[i].mnt,  in ovl_check_origin_fh()
391 		.layer = &ofs->layers[i]  in ovl_check_origin_fh()
404 static int ovl_check_origin(struct ovl_fs *ofs, struct dentry *upperdentry,  in ovl_check_origin()  argument
407 	struct ovl_fh *fh = ovl_get_fh(ofs, upperdentry, OVL_XATTR_ORIGIN);  in ovl_check_origin()
413 	err = ovl_check_origin_fh(ofs, fh, false, upperdentry, stackp);  in ovl_check_origin()
429 static int ovl_verify_fh(struct ovl_fs *ofs, struct dentry *dentry,  in ovl_verify_fh()  argument
432 	struct ovl_fh *ofh = ovl_get_fh(ofs, dentry, ox);  in ovl_verify_fh()
456 int ovl_verify_set_fh(struct ovl_fs *ofs, struct dentry *dentry,  in ovl_verify_set_fh()  argument
464 	fh = ovl_encode_real_fh(ofs, real, is_upper);  in ovl_verify_set_fh()
471 	err = ovl_verify_fh(ofs, dentry, ox, fh);  in ovl_verify_set_fh()
473 		err = ovl_setxattr(ofs, dentry, ox, fh->buf, fh->fb.len);  in ovl_verify_set_fh()
490 struct dentry *ovl_index_upper(struct ovl_fs *ofs, struct dentry *index)  in ovl_index_upper()  argument
498 	fh = ovl_get_fh(ofs, index, OVL_XATTR_UPPER);  in ovl_index_upper()
502 	upper = ovl_decode_real_fh(ofs, fh, ovl_upper_mnt(ofs), true);  in ovl_index_upper()
523 int ovl_verify_index(struct ovl_fs *ofs, struct dentry *index)  in ovl_verify_index()  argument
565 	if (d_is_dir(index) && !ofs->config.nfs_export)  in ovl_verify_index()
575 	upper = ovl_index_upper(ofs, index);  in ovl_verify_index()
591 	err = ovl_verify_fh(ofs, upper, OVL_XATTR_ORIGIN, fh);  in ovl_verify_index()
598 		err = ovl_check_origin_fh(ofs, fh, false, index, &stack);  in ovl_verify_index()
602 		if (ovl_get_nlink(ofs, origin.dentry, index, 0) == 0)  in ovl_verify_index()
654 int ovl_get_index_name(struct ovl_fs *ofs, struct dentry *origin,  in ovl_get_index_name()  argument
660 	fh = ovl_encode_real_fh(ofs, origin, false);  in ovl_get_index_name()
671 struct dentry *ovl_get_index_fh(struct ovl_fs *ofs, struct ovl_fh *fh)  in ovl_get_index_fh()  argument
681 	index = lookup_positive_unlocked(name.name, ofs->indexdir, name.len);  in ovl_get_index_fh()
700 struct dentry *ovl_lookup_index(struct ovl_fs *ofs, struct dentry *upper,  in ovl_lookup_index()  argument
709 	err = ovl_get_index_name(ofs, origin, &name);  in ovl_lookup_index()
713 	index = lookup_one_positive_unlocked(ovl_upper_mnt_userns(ofs), name.name,  in ovl_lookup_index()
714 					     ofs->indexdir, name.len);  in ovl_lookup_index()
760 		err = ovl_verify_upper(ofs, index, upper, false);  in ovl_lookup_index()
809 static int ovl_fix_origin(struct ovl_fs *ofs, struct dentry *dentry,  in ovl_fix_origin()  argument
814 	if (ovl_check_origin_xattr(ofs, upper))  in ovl_fix_origin()
821 	err = ovl_set_origin(ofs, lower, upper);  in ovl_fix_origin()
834 	struct ovl_fs *ofs = dentry->d_sb->s_fs_info;  in ovl_lookup()  local
855 		.last = ofs->config.redirect_follow ? false : !poe->numlower,  in ovl_lookup()
860 	if (dentry->d_name.len > ofs->namelen)  in ovl_lookup()
866 		d.mnt = ovl_upper_mnt(ofs);  in ovl_lookup()
887 			err = ovl_check_origin(ofs, upperdentry, &origin_path);  in ovl_lookup()
908 		stack = kcalloc(ofs->numlayer - 1, sizeof(struct ovl_path),  in ovl_lookup()
917 		if (!ofs->config.redirect_follow)  in ovl_lookup()
930 		if ((uppermetacopy || d.metacopy) && !ofs->config.metacopy) {  in ovl_lookup()
941 		if (upperdentry && !ctr && !ofs->noxattr && d.is_dir) {  in ovl_lookup()
942 			err = ovl_fix_origin(ofs, dentry, this, upperdentry);  in ovl_lookup()
960 		     (!d.is_dir && ofs->config.index && origin_path))) {  in ovl_lookup()
961 			err = ovl_verify_origin(ofs, upperdentry, this, false);  in ovl_lookup()
997 		if (d.redirect && !ofs->config.redirect_follow) {  in ovl_lookup()
1061 		index = ovl_lookup_index(ofs, upperdentry, origin, true);  in ovl_lookup()
1085 			.mnt = ovl_upper_mnt(ofs),  in ovl_lookup()
1088 		upperredirect = ovl_get_redirect_xattr(ofs, &upperpath, 0);  in ovl_lookup()
1094 		err = ovl_check_metacopy_xattr(ofs, &upperpath);  in ovl_lookup()