[PATCH v3 11/20] xfsprogs/mkfs: finobt mkfs support

[Dave Chinner]

On Thu, Apr 10, 2014 at 12:11:01PM -0400, Brian Foster wrote:
> Add the 'finobt' metadata option to mkfs to format an fs with free
> inode btree support. If enabled, initialize the associated AGI
> header fields and btree root block.
> 
> Also, do the initialization of the superblock version and feature
> bits (including the new finobt flag) a bit earlier. These fields
> must now be initialized prior to the use of XFS_PREALLOC_BLOCKS(),
> as the latter returns a value that depends on whether a finobt root
> btree block is reserved.
> 
> Signed-off-by: Brian Foster <bfoster at redhat.com>

$ sudo mkfs.xfs -f -mcrc=1,finobt=1 -m crc=0 -d size=128m /dev/ram1
meta-data=/dev/ram1              isize=256    agcount=4, agsize=8192 blks
         =                       sectsz=512   attr=2, projid32bit=1
	 =                       crc=0        finobt=1
	                         ^^^^^        ^^^^^^^^
.....
$ mount /dev/ram1 /mnt/scratch
[ 4727.269080] XFS (ram1): Mounting Filesystem
[ 4727.270077] XFS (ram1): Log inconsistent or not a log (last==0, first!=1)
[ 4727.271227] XFS (ram1): empty log check failed
[ 4727.271970] XFS (ram1): log mount/recovery failed: error 22
[ 4727.273097] XFS (ram1): log mount failed

If "-mcrc=0" is seen on the command line, it needs to turn off
finobt....

xfs/001 and xfs/002 trip over this when run like:

$ MKFS_OPTIONS="-mcrc=1,finobt=1" ./check xfs/00[12]

Otherwise, everything seems to be working ;)

Cheers,

Dave.
-- 
Dave Chinner
david at fromorbit.com