LU-10286 mdt: deny 2.10 clients to open mirrored files

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

diff --git a/lustre/mdt/mdt_reint.c b/lustre/mdt/mdt_reint.c
index 11ea9c9..a865f75 100644 (file)
--- a/lustre/mdt/mdt_reint.c
+++ b/lustre/mdt/mdt_reint.c
@@ -731,11 +731,21 @@ static int mdt_reint_setattr(struct mdt_thread_info *info,
        if (mdt_object_remote(mo))
                GOTO(out_put, rc = -EREMOTE);
 
-       if ((ma->ma_attr.la_valid & LA_SIZE) ||
-           (rr->rr_flags & MRF_OPEN_TRUNC)) {
+       if (ma->ma_attr.la_valid & LA_SIZE || rr->rr_flags & MRF_OPEN_TRUNC) {
                /* Check write access for the O_TRUNC case */
                if (mdt_write_read(mo) < 0)
                        GOTO(out_put, rc = -ETXTBSY);
+
+               /* LU-10286: compatibility check for FLR.
+                * Please check the comment in mdt_finish_open() for details */
+               if (!exp_connect_flr(info->mti_exp)) {
+                       rc = mdt_big_xattr_get(info, mo, XATTR_NAME_LOV);
+                       if (rc < 0 && rc != -ENODATA)
+                               GOTO(out_put, rc);
+
+                       if (rc > 0 && mdt_lmm_is_flr(info->mti_big_lmm))
+                               GOTO(out_put, rc = -EOPNOTSUPP);
+               }
        }
 
        if ((ma->ma_valid & MA_INODE) && ma->ma_attr.la_valid) {