LU-4364 fld: add error handler in fldb_seq_start

[fs/lustre-release.git] / lustre / fld / lproc_fld.c

diff --git a/lustre/fld/lproc_fld.c b/lustre/fld/lproc_fld.c
index ccfb258..caf3c1a 100644 (file)
--- a/lustre/fld/lproc_fld.c
+++ b/lustre/fld/lproc_fld.c
@@ -167,6 +167,8 @@ static void *fldb_seq_start(struct seq_file *p, loff_t *pos)
        struct lu_server_fld    *fld;
        struct dt_object        *obj;
        const struct dt_it_ops  *iops;
+       struct dt_key           *key;
+       int                     rc;
 
        if (param == NULL || param->fsp_stop)
                return NULL;
@@ -176,9 +178,16 @@ static void *fldb_seq_start(struct seq_file *p, loff_t *pos)
        LASSERT(obj != NULL);
        iops = &obj->do_index_ops->dio_it;
 
-       iops->load(&param->fsp_env, param->fsp_it, *pos);
+       rc = iops->load(&param->fsp_env, param->fsp_it, *pos);
+       if (rc <= 0)
+               return NULL;
+
+       key = iops->key(&param->fsp_env, param->fsp_it);
+       if (IS_ERR(key))
+               return NULL;
+
+       *pos = be64_to_cpu(*(__u64 *)key);
 
-       *pos = be64_to_cpu(*(__u64 *)iops->key(&param->fsp_env, param->fsp_it));
        return param;
 }