+ if (rc > offsetof(typeof(*lfm), lfm_value) &&
+ *((__u32 *)buf->lb_buf) == LMV_MAGIC_FOREIGN) {
+ __u32 value_len;
+
+ lfm = buf->lb_buf;
+ value_len = le32_to_cpu(lfm->lfm_length);
+ CDEBUG(D_INFO,
+ "foreign LMV EA, magic %x, len %u, type %x, flags %x, for dir "DFID"\n",
+ le32_to_cpu(lfm->lfm_magic), value_len,
+ le32_to_cpu(lfm->lfm_type), le32_to_cpu(lfm->lfm_flags),
+ PFID(lfsck_dto2fid(obj)));
+
+ if (rc != value_len + offsetof(typeof(*lfm), lfm_value))
+ CDEBUG(D_LFSCK,
+ "foreign LMV EA internal size %u does not match EA full size %d for dir "DFID"\n",
+ value_len, rc, PFID(lfsck_dto2fid(obj)));
+
+ /* no further usage/decode of foreign LMV outside */
+ return -ENODATA;
+ }
+
+ if (rc == sizeof(*lmv)) {
+ rc = 0;
+ lfsck_lmv_header_le_to_cpu(lmv, lmv);
+ /* if LMV is corrupt, return -ENODATA */
+ if (lmv->lmv_magic != LMV_MAGIC_V1 &&
+ lmv->lmv_magic != LMV_MAGIC_STRIPE)
+ rc = -ENODATA;
+ } else if (rc >= 0) {
+ /* LMV is corrupt */
+ rc = -ENODATA;
+ }
+
+ return rc;