the secondary boot is stored to embed them into the primary bootxx)
for ext2fs.
Currently disabled because there is no primary boot block
which supports ext2fs, but it might help someone in some day.
If specified then checks on the disks BPB are not done, and any existing BPB
is deleted.
This is needed soince newfs(8) doesn't overwrite the BPB - which is basically
the FAT superblock.
Update documentation and add an example of using bootxx_fat16.
Automatically enable writes to the 'labelsector' if necessary.
Detect and recover from problems with the write-protected 'labelsector'
stopping writes to nearby sectors when the non-raw disk device is used.
Support the installation of 512-byte pbr boot code (eg fatboot).
Verify that there is enough reserved space in the bpb (if not all zeros) to
avoid overwriting the start of FAT filesystems.
about empty bodies in an if-statement, we need to make add some proprocessor
conditionals around these if statements. FFS byte-swapping is sometimes
compiled out of install-media versions of this program.
to ffs_find_disk_blocks_ufs2() too. Except for data types the
code in the two functions is the same.
From the original commit message:
Add support for finding files on RAID partitions. This allows us to
add the block list of the 2nd stage boot loader to the 1st stage boot
loader when the partition is a RAID partition.
Briefly tested under 3.x/i386.
directly.
Including raidframevar.h needs several definitions adding to the compat
framework for the tools builds, which aren't needed here.
XXX It's probably sensible to split off the few defines from raidframevar.h
into a separate header file.
stage bootstrap is specified. It is only needed when we need to copy the
sector numbers of the second stage into the first stage.
Document that a configured baud rate of zero will cause the baud rate set by
the bios to be used.
_NETBSD_SOURCE as this makes cross building from older/newer versions of
NetBSD harder, not easier (and also makes the resulting tools 'different')
Wrap all required code with the inclusion of nbtool_config.h, attempt to
only use POSIX code in all places (or when reasonable test w. configure and
provide definitions: ala u_int, etc).
Reviewed by lukem. Tested on FreeBSD 4.9, Redhat Linux ES3, NetBSD 1.6.2 x86
NetBSD current (x86 and amd64) and Solaris 9.
Fixes PR's: PR#17762 PR#25944
location where we expect to find an ffsv2 superblock.
It could be the first alternate for a ffsv1 filesystem with 64k blocks.
Fixes part of PR kern/24809
This code is not to be reenabled again until it is fixed to my satisfaction
(as a member of core and the person who ends up dealing with most of
the host tool build bugs)
the boot blocks on the existing mounted root file system, and
eliminating references to bootxx_ufs.
I referenced the a partition even though most other ports seem to
reference the c partition. I don't know if that's the most correct
way to do it, but it seems to work for me and no one can tell me what
the canonical method is. I'd let someone else fix the man page but no
one seemed to want to and it really needed the example.
* Rename "config.h" to "nbtool_config.h" and
HAVE_CONFIG_H to HAVE_NBTOOL_CONFIG_H.
This makes in more obvious in the source when we're using
tools/compat/config.h versus "standard autoconf" config.h
* Consistently move the inclusion of nbtool_config.h to before
<sys/cdefs.h> so that the former can provide __RCSID() (et al),
and there's no need to protect those macros any more.
These changes should make it easier to "tool-ify" a program by adding:
#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif
to the top of the source files (for the general case).
first three bytes to determine how much of the BPB to preserve.
Supported values:
eb 3c 90 FAT16 BPB
eb 58 90 FAT32 BPB
(anything else) don't preserve any BPB
This is because the BPB is generally only the FAT16 one except in the
bootxx_msdos case, where it's the larger FAT32 one.
<sys/bootblock.h>:
* Added definitions for the Master Boot Record (MBR) used by
a variety of systems (primarily i386), including the format
of the BIOS Parameter Block (BPB).
This information was cribbed from a variety of sources
including <sys/disklabel_mbr.h> which this is a superset of.
As part of this, some data structure elements and #defines
were renamed to be more "namespace friendly" and consistent
with other bootblocks and MBR documentation.
Update all uses of the old names to the new names.
<sys/disklabel_mbr.h>:
* Deprecated in favor of <sys/bootblock.h> (the latter is more
"host tool" friendly).
amd64 & i386:
* Renamed /usr/mdec/bootxx_dosfs to /usr/mdec/bootxx_msdos, to
be consistent with the naming convention of the msdosfs tools.
* Removed /usr/mdec/bootxx_ufs, as it's equivalent to bootxx_ffsv1
and it's confusing to have two functionally equivalent bootblocks,
especially given that "ufs" has multiple meanings (it could be
a synonym for "ffs", or the group of ffs/lfs/ext2fs file systems).
* Rework pbr.S (the first sector of bootxx_*):
+ Ensure that BPB (bytes 11..89) and the partition table
(bytes 446..509) do not contain code.
+ Add support for booting from FAT partitions if BOOT_FROM_FAT
is defined. (Only set for bootxx_msdos).
+ Remove "dummy" partition 3; if people want to installboot(8)
these to the start of the disk they can use fdisk(8) to
create a real MBR partition table...
+ Compile with TERSE_ERROR so it fits because of the above.
Whilst this is less user friendly, I feel it's important
to have a valid partition table and BPB in the MBR/PBR.
* Renamed /usr/mdec/biosboot to /usr/mdec/boot, to be consistent
with other platforms.
* Enable SUPPORT_DOSFS in /usr/mdec/boot (stage2), so that
we can boot off FAT partitions.
* Crank version of /usr/mdec/boot to 3.1, and fix some of the other
entries in the version file.
installboot(8) (i386):
* Read the existing MBR of the filesystem and retain the BIOS
Parameter Block (BPB) in bytes 11..89 and the MBR partition
table in bytes 446..509. (Previously installboot(8) would
trash those two sections of the MBR.)
mbrlabel(8):
* Use sys/lib/libkern/xlat_mbr_fstype.c instead of homegrown code
to map the MBR partition type to the NetBSD disklabel type.
Test built "make release" for i386, and new bootblocks verified to work
(even off FAT!).
dsl