1011                 return;
1012 
1013         if (!vdev_writeable(vd))
1014                 return;
1015 
1016         n = ub->ub_txg & (VDEV_UBERBLOCK_COUNT(vd) - 1);
1017 
1018         ubbuf = zio_buf_alloc(VDEV_UBERBLOCK_SIZE(vd));
1019         bzero(ubbuf, VDEV_UBERBLOCK_SIZE(vd));
1020         *ubbuf = *ub;
1021 
1022         for (int l = 0; l < VDEV_LABELS; l++)
1023                 vdev_label_write(zio, vd, l, ubbuf,
1024                     VDEV_UBERBLOCK_OFFSET(vd, n), VDEV_UBERBLOCK_SIZE(vd),
1025                     vdev_uberblock_sync_done, zio->io_private,
1026                     flags | ZIO_FLAG_DONT_PROPAGATE);
1027 
1028         zio_buf_free(ubbuf, VDEV_UBERBLOCK_SIZE(vd));
1029 }
1030 

1031 int
1032 vdev_uberblock_sync_list(vdev_t **svd, int svdcount, uberblock_t *ub, int flags)
1033 {
1034         spa_t *spa = svd[0]->vdev_spa;
1035         zio_t *zio;
1036         uint64_t good_writes = 0;
1037 
1038         zio = zio_root(spa, NULL, &good_writes, flags);
1039 
1040         for (int v = 0; v < svdcount; v++)
1041                 vdev_uberblock_sync(zio, ub, svd[v], flags);
1042 
1043         (void) zio_wait(zio);
1044 
1045         /*
1046          * Flush the uberblocks to disk.  This ensures that the odd labels
1047          * are no longer needed (because the new uberblocks and the even
1048          * labels are safely on disk), so it is safe to overwrite them.
1049          */
1050         zio = zio_root(spa, NULL, NULL, flags);

1011                 return;
1012 
1013         if (!vdev_writeable(vd))
1014                 return;
1015 
1016         n = ub->ub_txg & (VDEV_UBERBLOCK_COUNT(vd) - 1);
1017 
1018         ubbuf = zio_buf_alloc(VDEV_UBERBLOCK_SIZE(vd));
1019         bzero(ubbuf, VDEV_UBERBLOCK_SIZE(vd));
1020         *ubbuf = *ub;
1021 
1022         for (int l = 0; l < VDEV_LABELS; l++)
1023                 vdev_label_write(zio, vd, l, ubbuf,
1024                     VDEV_UBERBLOCK_OFFSET(vd, n), VDEV_UBERBLOCK_SIZE(vd),
1025                     vdev_uberblock_sync_done, zio->io_private,
1026                     flags | ZIO_FLAG_DONT_PROPAGATE);
1027 
1028         zio_buf_free(ubbuf, VDEV_UBERBLOCK_SIZE(vd));
1029 }
1030 
1031 /* Sync the uberblocks to all vdevs in svd[] */
1032 int
1033 vdev_uberblock_sync_list(vdev_t **svd, int svdcount, uberblock_t *ub, int flags)
1034 {
1035         spa_t *spa = svd[0]->vdev_spa;
1036         zio_t *zio;
1037         uint64_t good_writes = 0;
1038 
1039         zio = zio_root(spa, NULL, &good_writes, flags);
1040 
1041         for (int v = 0; v < svdcount; v++)
1042                 vdev_uberblock_sync(zio, ub, svd[v], flags);
1043 
1044         (void) zio_wait(zio);
1045 
1046         /*
1047          * Flush the uberblocks to disk.  This ensures that the odd labels
1048          * are no longer needed (because the new uberblocks and the even
1049          * labels are safely on disk), so it is safe to overwrite them.
1050          */
1051         zio = zio_root(spa, NULL, NULL, flags);