FreeBSD: Use ashift in vdev_check_boot_reserve()

We should not hardcode 512-byte read size when checking for loader in the boot area before RAIDZ expansion. Disk might be unable to handle that I/O as is, and the code zio_vdev_io_start() handling the padding asserts doing it only for top-level vdev. Signed-off-by: Alexander Motin <[email protected]> Sponsored by: iXsystems, Inc.
openzfs · Jan 10, 2025 · 4c65639 · 4c65639
1 parent b8e09c7
commit 4c65639
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/module/os/freebsd/zfs/vdev_label_os.c b/module/os/freebsd/zfs/vdev_label_os.c
@@ -96,7 +96,7 @@ vdev_check_boot_reserve(spa_t *spa, vdev_t *childvd)
 {
 	ASSERT(childvd->vdev_ops->vdev_op_leaf);
 
-	size_t size = SPA_MINBLOCKSIZE;
+	size_t size = 1ULL << childvd->vdev_top->vdev_ashift;
 	abd_t *abd = abd_alloc_linear(size, B_FALSE);
 
 	zio_t *pio = zio_root(spa, NULL, NULL, 0);