1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or https://opensource.org/licenses/CDDL-1.0. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 #include <sys/zfs_context.h> 23 #include <sys/spa.h> 24 #include <sys/spa_impl.h> 25 #include <sys/dmu.h> 26 #include <sys/zap.h> 27 #include <sys/vdev.h> 28 #include <sys/vdev_os.h> 29 #include <sys/vdev_impl.h> 30 #include <sys/uberblock_impl.h> 31 #include <sys/metaslab.h> 32 #include <sys/metaslab_impl.h> 33 #include <sys/zio.h> 34 #include <sys/dsl_scan.h> 35 #include <sys/abd.h> 36 #include <sys/fs/zfs.h> 37 38 int 39 vdev_label_write_pad2(vdev_t *vd, const char *buf, size_t size) 40 { 41 spa_t *spa = vd->vdev_spa; 42 zio_t *zio; 43 abd_t *pad2; 44 int flags = ZIO_FLAG_CONFIG_WRITER | ZIO_FLAG_CANFAIL; 45 int error; 46 47 if (size > VDEV_PAD_SIZE) 48 return (EINVAL); 49 50 if (!vd->vdev_ops->vdev_op_leaf) 51 return (ENODEV); 52 if (vdev_is_dead(vd)) 53 return (ENXIO); 54 55 ASSERT3U(spa_config_held(spa, SCL_ALL, RW_WRITER), ==, SCL_ALL); 56 57 pad2 = abd_alloc_for_io(VDEV_PAD_SIZE, B_TRUE); 58 abd_zero(pad2, VDEV_PAD_SIZE); 59 abd_copy_from_buf(pad2, buf, size); 60 61 retry: 62 zio = zio_root(spa, NULL, NULL, flags); 63 vdev_label_write(zio, vd, 0, pad2, 64 offsetof(vdev_label_t, vl_be), 65 VDEV_PAD_SIZE, NULL, NULL, flags); 66 error = zio_wait(zio); 67 if (error != 0 && !(flags & ZIO_FLAG_TRYHARD)) { 68 flags |= ZIO_FLAG_TRYHARD; 69 goto retry; 70 } 71 72 abd_free(pad2); 73 return (error); 74 } 75