+void
+zfs_blkptr_verify(spa_t *spa, const blkptr_t *bp)
+{
+ int i;
+
+ if (!DMU_OT_IS_VALID(BP_GET_TYPE(bp))) {
+ zfs_panic_recover("blkptr at %p has invalid TYPE %llu",
+ bp, (longlong_t)BP_GET_TYPE(bp));
+ }
+ if (BP_GET_CHECKSUM(bp) >= ZIO_CHECKSUM_FUNCTIONS ||
+ BP_GET_CHECKSUM(bp) <= ZIO_CHECKSUM_ON) {
+ zfs_panic_recover("blkptr at %p has invalid CHECKSUM %llu",
+ bp, (longlong_t)BP_GET_CHECKSUM(bp));
+ }
+ if (BP_GET_COMPRESS(bp) >= ZIO_COMPRESS_FUNCTIONS ||
+ BP_GET_COMPRESS(bp) <= ZIO_COMPRESS_ON) {
+ zfs_panic_recover("blkptr at %p has invalid COMPRESS %llu",
+ bp, (longlong_t)BP_GET_COMPRESS(bp));
+ }
+ if (BP_GET_LSIZE(bp) > SPA_MAXBLOCKSIZE) {
+ zfs_panic_recover("blkptr at %p has invalid LSIZE %llu",
+ bp, (longlong_t)BP_GET_LSIZE(bp));
+ }
+ if (BP_GET_PSIZE(bp) > SPA_MAXBLOCKSIZE) {
+ zfs_panic_recover("blkptr at %p has invalid PSIZE %llu",
+ bp, (longlong_t)BP_GET_PSIZE(bp));
+ }
+
+ if (BP_IS_EMBEDDED(bp)) {
+ if (BPE_GET_ETYPE(bp) > NUM_BP_EMBEDDED_TYPES) {
+ zfs_panic_recover("blkptr at %p has invalid ETYPE %llu",
+ bp, (longlong_t)BPE_GET_ETYPE(bp));
+ }
+ }
+
+ /*
+ * Pool-specific checks.
+ *
+ * Note: it would be nice to verify that the blk_birth and
+ * BP_PHYSICAL_BIRTH() are not too large. However, spa_freeze()
+ * allows the birth time of log blocks (and dmu_sync()-ed blocks
+ * that are in the log) to be arbitrarily large.
+ */
+ for (i = 0; i < BP_GET_NDVAS(bp); i++) {
+ uint64_t vdevid = DVA_GET_VDEV(&bp->blk_dva[i]);
+ vdev_t *vd;
+ uint64_t offset, asize;
+ if (vdevid >= spa->spa_root_vdev->vdev_children) {
+ zfs_panic_recover("blkptr at %p DVA %u has invalid "
+ "VDEV %llu",
+ bp, i, (longlong_t)vdevid);
+ continue;
+ }
+ vd = spa->spa_root_vdev->vdev_child[vdevid];
+ if (vd == NULL) {
+ zfs_panic_recover("blkptr at %p DVA %u has invalid "
+ "VDEV %llu",
+ bp, i, (longlong_t)vdevid);
+ continue;
+ }
+ if (vd->vdev_ops == &vdev_hole_ops) {
+ zfs_panic_recover("blkptr at %p DVA %u has hole "
+ "VDEV %llu",
+ bp, i, (longlong_t)vdevid);
+ continue;
+ }
+ if (vd->vdev_ops == &vdev_missing_ops) {
+ /*
+ * "missing" vdevs are valid during import, but we
+ * don't have their detailed info (e.g. asize), so
+ * we can't perform any more checks on them.
+ */
+ continue;
+ }
+ offset = DVA_GET_OFFSET(&bp->blk_dva[i]);
+ asize = DVA_GET_ASIZE(&bp->blk_dva[i]);
+ if (BP_IS_GANG(bp))
+ asize = vdev_psize_to_asize(vd, SPA_GANGBLOCKSIZE);
+ if (offset + asize > vd->vdev_asize) {
+ zfs_panic_recover("blkptr at %p DVA %u has invalid "
+ "OFFSET %llu",
+ bp, i, (longlong_t)offset);
+ }
+ }
+}
+