LU-2855 kuc: error management in KUC broadcast delivery

[fs/lustre-release.git] / libcfs / libcfs / kernel_user_comm.c

diff --git a/libcfs/libcfs/kernel_user_comm.c b/libcfs/libcfs/kernel_user_comm.c
index 228f828..47b9a86 100644 (file)
--- a/libcfs/libcfs/kernel_user_comm.c
+++ b/libcfs/libcfs/kernel_user_comm.c
@@ -273,23 +273,31 @@ CFS_EXPORT_SYMBOL(libcfs_kkuc_group_rem);
 
 int libcfs_kkuc_group_put(int group, void *payload)
 {
-        struct kkuc_reg *reg;
-        int rc = 0;
-        ENTRY;
+       struct kkuc_reg *reg;
+       int              rc = 0;
+       int one_success = 0;
+       ENTRY;
 
        down_read(&kg_sem);
-        cfs_list_for_each_entry(reg, &kkuc_groups[group], kr_chain) {
-                if (reg->kr_fp != NULL) {
-                rc = libcfs_kkuc_msg_put(reg->kr_fp, payload);
-                        if (rc == -EPIPE) {
-                                cfs_put_file(reg->kr_fp);
-                                reg->kr_fp = NULL;
-                        }
-                }
-        }
+       cfs_list_for_each_entry(reg, &kkuc_groups[group], kr_chain) {
+               if (reg->kr_fp != NULL) {
+                       rc = libcfs_kkuc_msg_put(reg->kr_fp, payload);
+                       if (rc == 0)
+                               one_success = 1;
+                       else if (rc == -EPIPE) {
+                               cfs_put_file(reg->kr_fp);
+                               reg->kr_fp = NULL;
+                       }
+               }
+       }
        up_read(&kg_sem);
 
-        RETURN(rc);
+       /* don't return an error if the message has been delivered
+        * at least to one agent */
+       if (one_success)
+               rc = 0;
+
+       RETURN(rc);
 }
 CFS_EXPORT_SYMBOL(libcfs_kkuc_group_put);