OpenZFS 9191 - dump vdev tree to zfs_dbgmsg when spa load fails due to missing log...

Add vdev_print_tree() in spa_check_for_missing_logs() when some log
devices are missing to ease debugging

Authored by: Pavel Zakharov <pavel.zakharov@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Prakash Surya <prakash.surya@delphix.com>
Reviewed by: Matt Ahrens <matt@delphix.com>
Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Approved by: Robert Mustacchi <rm@joyent.com>
Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>
OpenZFS-issue: https://illumos.org/issues/9191
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/c5c02e5
Closes #7531

diff --git a/module/zfs/spa.c b/module/zfs/spa.c
index 3177f9649c4087a44bd72dffb9fe0863dba466d4..dba6efe7be9d54fc23bc40fd3b72c2f06686140d 100644 (file)
--- a/module/zfs/spa.c
+++ b/module/zfs/spa.c
@@ -1888,6 +1888,7 @@ spa_check_for_missing_logs(spa_t *spa)
 
                if (idx > 0) {
                        spa_load_failed(spa, "some log devices are missing");
+                       vdev_dbgmsg_print_tree(rvd, 2);
                        return (SET_ERROR(ENXIO));
                }
        } else {
@@ -1899,6 +1900,7 @@ spa_check_for_missing_logs(spa_t *spa)
                                spa_set_log_state(spa, SPA_LOG_CLEAR);
                                spa_load_note(spa, "some log devices are "
                                    "missing, ZIL is dropped.");
+                               vdev_dbgmsg_print_tree(rvd, 2);
                                break;
                        }
                }