The parisc bootloader, palo, has understood how to read ext2/3 filesystems for decades. However, keeping an ext2/3 partition around simply to boot from is becoming a bit old, so add support for ext4 to the iplboot code. Note, this still doesn't fix ipl specific limitations, like the inability to read a disk beyond 2GB, so you will still need a low sector /boot partition for this. The assumptions I've made adding ext4 are that the only additional variables over ext2/3 are the variable group descriptor size support, conditioned on the EXT4_FEATURE_INCOMPAT_64BIT flag and extent based inodes conditioned on the EXT3_EXTENTS_FL (it's been renamed to EXT4_EXTENTS_FL now in libext2fs). Filesystem people interested in reviewing the extent handling code probably only need look at patch 3/4 iplboot: add ext4 support James --- James Bottomley (4): iplboot: eliminate unused struct bootfs iplboot: update the ext2_fs.h header iplboot: add ext4 support palo: add support for formatting as ext4 ipl/bootloader.h | 13 --- ipl/ext2.c | 256 +++++++++++++++++++++++++++++++++++++++++++------------ ipl/ext2_fs.h | 42 ++++++++- iplboot | Bin 45056 -> 45056 bytes palo/palo.c | 6 +- 5 files changed, 245 insertions(+), 72 deletions(-) -- 2.16.4
