LU-11406 mdt: mdt_reint_setxattr() to check rr_eadata

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

diff --git a/lustre/mdt/mdt_xattr.c b/lustre/mdt/mdt_xattr.c
index 4245f24..9bd7526 100644 (file)
--- a/lustre/mdt/mdt_xattr.c
+++ b/lustre/mdt/mdt_xattr.c
@@ -502,6 +502,10 @@ int mdt_reint_setxattr(struct mdt_thread_info *info,
                if (strcmp(xattr_name, XATTR_NAME_LMV) == 0) {
                        __u32 *magic = rr->rr_eadata;
 
+                       /* we don't let to remove LMV? */
+                       if (!rr->rr_eadata)
+                               GOTO(out, rc = 0);
+
                        if (le32_to_cpu(*magic) == LMV_USER_MAGIC ||
                            le32_to_cpu(*magic) == LMV_USER_MAGIC_SPECIFIC) {
                                rc = mdt_dir_layout_shrink(info);