LU-15132 hsm: Protect against parallel HSM restore requests

[fs/lustre-release.git] / lustre / mdt / mdt_hsm_cdt_client.c

diff --git a/lustre/mdt/mdt_hsm_cdt_client.c b/lustre/mdt/mdt_hsm_cdt_client.c
index 9f78796..4e837d6 100644 (file)
--- a/lustre/mdt/mdt_hsm_cdt_client.c
+++ b/lustre/mdt/mdt_hsm_cdt_client.c
@@ -365,8 +365,16 @@ static int mdt_hsm_register_hal(struct mdt_thread_info *mti,
                        if (hai->hai_extent.offset != 0)
                                GOTO(out, rc = -EPROTO);
 
+                       /* LU-15132 */
+                       OBD_RACE(OBD_FAIL_MDS_HSM_RESTORE_RACE);
+
                        rc = cdt_restore_handle_add(mti, cdt, &hai->hai_fid,
                                                    &hai->hai_extent);
+                       if (rc == 1) {
+                               rc = 0;
+                               continue;
+                       }
+
                        if (rc < 0)
                                GOTO(out, rc);
                }