Attached patch makes it possible to install GRUB into ZFS partition or whole-disk ZFS sanely. May be dangerous so I recommend a VM and/or backup.
-- Regards Vladimir 'φ-coder/phcoder' Serbinenko
=== modified file 'grub-core/fs/zfs/zfs.c'
--- grub-core/fs/zfs/zfs.c 2011-11-06 20:08:32 +0000
+++ grub-core/fs/zfs/zfs.c 2011-11-06 20:56:34 +0000
@@ -3760,6 +3760,35 @@
return grub_errno;
}
+#ifdef GRUB_UTIL
+static grub_err_t
+grub_zfs_embed (grub_device_t device __attribute__ ((unused)),
+ unsigned int *nsectors,
+ grub_embed_type_t embed_type,
+ grub_disk_addr_t **sectors)
+{
+ unsigned i;
+
+ if (embed_type != GRUB_EMBED_PCBIOS)
+ return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
+ "ZFS curently supports only PC-BIOS embedding");
+
+ if ((VDEV_BOOT_SIZE >> GRUB_DISK_SECTOR_BITS) < *nsectors)
+ return grub_error (GRUB_ERR_OUT_OF_RANGE,
+ "Your core.img is unusually large. "
+ "It won't fit in the embedding area.");
+
+ *nsectors = (VDEV_BOOT_SIZE >> GRUB_DISK_SECTOR_BITS);
+ *sectors = grub_malloc (*nsectors * sizeof (**sectors));
+ if (!*sectors)
+ return grub_errno;
+ for (i = 0; i < *nsectors; i++)
+ (*sectors)[i] = i + (VDEV_BOOT_OFFSET >> GRUB_DISK_SECTOR_BITS);
+
+ return GRUB_ERR_NONE;
+}
+#endif
+
static struct grub_fs grub_zfs_fs = {
.name = "zfs",
.dir = grub_zfs_dir,
@@ -3769,6 +3798,10 @@
.label = zfs_label,
.uuid = zfs_uuid,
.mtime = zfs_mtime,
+#ifdef GRUB_UTIL
+ .embed = grub_zfs_embed,
+ .reserved_first_sector = 1,
+#endif
.next = 0
};
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