[LU-8083] namespace LFSCK needs to handle symbol file properly

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.9.0
• Severity: 3
• Assignee: nasf (Inactive)
• Reporter: nasf (Inactive)

Description

We missed to handle symbol file when repair MDT-object's nlink as to cause ASSERT() in the following section:

static int lfsck_namespace_repair_nlink(const struct lu_env *env,
                                        struct lfsck_component *com,
                                        struct dt_object *obj,
                                        struct lu_attr *la)
{
        struct lfsck_thread_info        *info   = lfsck_env_info(env);
        struct lu_fid                   *tfid   = &info->lti_fid3;
        struct lfsck_namespace          *ns     = com->lc_file_ram;
        struct lfsck_instance           *lfsck  = com->lc_lfsck;
        struct dt_device                *dev    = lfsck_obj2dev(obj);
        const struct lu_fid             *cfid   = lfsck_dto2fid(obj);
        struct thandle                  *th     = NULL;
        struct linkea_data               ldata  = { NULL };
        struct lustre_handle             lh     = { 0 };
        __u32                            old    = la->la_nlink;
        int                              idx;
        int                              rc     = 0;
        __u8                             flags;
        ENTRY;

        LASSERT(!dt_object_remote(obj));
        LASSERT(S_ISREG(lfsck_object_type(obj)));
....