87 int ovl_check_fh_len(struct ovl_fh *fh, int fh_len)  in ovl_check_fh_len()  argument
89 	if (fh_len < sizeof(struct ovl_fh) || fh_len < fh->len)  in ovl_check_fh_len()
92 	if (fh->magic != OVL_FH_MAGIC)  in ovl_check_fh_len()
96 	if (fh->version > OVL_FH_VERSION || fh->flags & ~OVL_FH_FLAG_ALL)  in ovl_check_fh_len()
100 	if (!(fh->flags & OVL_FH_FLAG_ANY_ENDIAN) &&  in ovl_check_fh_len()
101 	    (fh->flags & OVL_FH_FLAG_BIG_ENDIAN) != OVL_FH_FLAG_CPU_ENDIAN)  in ovl_check_fh_len()
111 	struct ovl_fh *fh = NULL;  in ovl_get_fh()  local
123 	fh = kzalloc(res, GFP_KERNEL);  in ovl_get_fh()
124 	if (!fh)  in ovl_get_fh()
127 	res = ovl_do_vfs_getxattr(dentry, name, fh, res);  in ovl_get_fh()
131 	err = ovl_check_fh_len(fh, res);  in ovl_get_fh()
138 	return fh;  in ovl_get_fh()
141 	kfree(fh);  in ovl_get_fh()
149 			    (int)res, fh);  in ovl_get_fh()
153 struct dentry *ovl_decode_real_fh(struct ovl_fh *fh, struct vfsmount *mnt,  in ovl_decode_real_fh()  argument
163 	if (!uuid_equal(&fh->uuid, &mnt->mnt_sb->s_uuid))  in ovl_decode_real_fh()
166 	bytes = (fh->len - offsetof(struct ovl_fh, fid));  in ovl_decode_real_fh()
167 	real = exportfs_decode_fh(mnt, (struct fid *)fh->fid,  in ovl_decode_real_fh()
168 				  bytes >> 2, (int)fh->type,  in ovl_decode_real_fh()
178 		    !(fh->flags & OVL_FH_FLAG_PATH_UPPER))  in ovl_decode_real_fh()
323 int ovl_check_origin_fh(struct ovl_fs *ofs, struct ovl_fh *fh, bool connected,  in ovl_check_origin_fh()  argument
338 		origin = ovl_decode_real_fh(fh, ofs->lower_layers[i].mnt,  in ovl_check_origin_fh()
377 	struct ovl_fh *fh = ovl_get_fh(upperdentry, OVL_XATTR_ORIGIN);  in ovl_check_origin()  local
380 	if (IS_ERR_OR_NULL(fh))  in ovl_check_origin()
381 		return PTR_ERR(fh);  in ovl_check_origin()
383 	err = ovl_check_origin_fh(ofs, fh, false, upperdentry, stackp);  in ovl_check_origin()
384 	kfree(fh);  in ovl_check_origin()
404 			 const struct ovl_fh *fh)  in ovl_verify_fh()  argument
415 	if (fh->len != ofh->len || memcmp(fh, ofh, fh->len))  in ovl_verify_fh()
434 	struct ovl_fh *fh;  in ovl_verify_set_fh()  local
437 	fh = ovl_encode_real_fh(real, is_upper);  in ovl_verify_set_fh()
438 	err = PTR_ERR(fh);  in ovl_verify_set_fh()
439 	if (IS_ERR(fh)) {  in ovl_verify_set_fh()
440 		fh = NULL;  in ovl_verify_set_fh()
444 	err = ovl_verify_fh(dentry, name, fh);  in ovl_verify_set_fh()
446 		err = ovl_do_setxattr(dentry, name, fh, fh->len, 0);  in ovl_verify_set_fh()
451 	kfree(fh);  in ovl_verify_set_fh()
465 	struct ovl_fh *fh;  in ovl_index_upper()  local
471 	fh = ovl_get_fh(index, OVL_XATTR_UPPER);  in ovl_index_upper()
472 	if (IS_ERR_OR_NULL(fh))  in ovl_index_upper()
473 		return ERR_CAST(fh);  in ovl_index_upper()
475 	upper = ovl_decode_real_fh(fh, ofs->upper_mnt, true);  in ovl_index_upper()
476 	kfree(fh);  in ovl_index_upper()
504 	struct ovl_fh *fh = NULL;  in ovl_verify_index()  local
525 	fh = kzalloc(len, GFP_KERNEL);  in ovl_verify_index()
526 	if (!fh)  in ovl_verify_index()
530 	if (hex2bin((u8 *)fh, index->d_name.name, len))  in ovl_verify_index()
533 	err = ovl_check_fh_len(fh, len);  in ovl_verify_index()
575 	err = ovl_verify_fh(upper, OVL_XATTR_ORIGIN, fh);  in ovl_verify_index()
582 		err = ovl_check_origin_fh(ofs, fh, false, index, &stack);  in ovl_verify_index()
592 	kfree(fh);  in ovl_verify_index()
608 static int ovl_get_index_name_fh(struct ovl_fh *fh, struct qstr *name)  in ovl_get_index_name_fh()  argument
612 	n = kcalloc(fh->len, 2, GFP_KERNEL);  in ovl_get_index_name_fh()
616 	s  = bin2hex(n, fh, fh->len);  in ovl_get_index_name_fh()
640 	struct ovl_fh *fh;  in ovl_get_index_name()  local
643 	fh = ovl_encode_real_fh(origin, false);  in ovl_get_index_name()
644 	if (IS_ERR(fh))  in ovl_get_index_name()
645 		return PTR_ERR(fh);  in ovl_get_index_name()
647 	err = ovl_get_index_name_fh(fh, name);  in ovl_get_index_name()
649 	kfree(fh);  in ovl_get_index_name()
654 struct dentry *ovl_get_index_fh(struct ovl_fs *ofs, struct ovl_fh *fh)  in ovl_get_index_fh()  argument
660 	err = ovl_get_index_name_fh(fh, &name);  in ovl_get_index_fh()