[Ocfs2-tools-devel] ocfs2-tools-64bitblocks.patch for ocfs2-tools-1.3.9-0.1

[Sabuj Pattanayek]

> Here's a patch to allow mkfs.ocfs2 to create volumes greater than 16T.
> Haven't tested tunefs.ocfs2 yet:

The tunefs.ocfs2 -S didn't go as planned. The original lvm setup was
created with:

pvcreate /dev/mapper/3600d0230007024e80035fd3c9d1f7e00p1
pvcreate /dev/mapper/3600d0230007024a10036317a6f004200p1
vgcreate -s 2G vg /dev/mapper/3600d0230007024e80035fd3c9d1f7e00p1
/dev/mapper/3600d0230007024a10036317a6f004200p1
lvcreate -i 2 -I 128 -l 100%VG -n 20T vg

Then later today to extend the vg by 5T I did:

porpoise ~ # pvcreate /dev/mapper/3600d02300065e5190fffff73839bab00p1
  WARNING: Locking disabled. Be careful! This could corrupt your metadata.
  Physical volume "/dev/mapper/3600d02300065e5190fffff73839bab00p1"
successfully created
porpoise ~ # vgextend vg /dev/mapper/3600d02300065e5190fffff73839bab00p1
  WARNING: Locking disabled. Be careful! This could corrupt your metadata.
  Volume group "vg" successfully extended

So that the pv shows (dm-3 is a symlink to
/dev/mapper/3600d0230007024e80035fd3c9d1f7e00p1 , don't know how lvm
decides to use these names, but it's all the same):

# pvdisplay
  WARNING: Locking disabled. Be careful! This could corrupt your metadata.
  --- Physical volume ---
  PV Name               /dev/dm-3
  VG Name               vg
  PV Size               9.55 TB / not usable 1.36 GB
  Allocatable           yes (but full)
  PE Size (KByte)       2097152
  Total PE              4888
  Free PE               0
  Allocated PE          4888
  PV UUID               v6gSi5-ke6U-MFAU-kMzv-8rAX-4ZZL-2zGQVc

  --- Physical volume ---
  PV Name               /dev/mapper/3600d0230007024a10036317a6f004200p1
  VG Name               vg
  PV Size               9.55 TB / not usable 1.36 GB
  Allocatable           yes (but full)
  PE Size (KByte)       2097152
  Total PE              4888
  Free PE               0
  Allocated PE          4888
  PV UUID               FewJz1-n7bb-se8G-mUDe-qdqK-akKj-I0x5SG

  --- Physical volume ---
  PV Name               /dev/mapper/3600d02300065e5190fffff73839bab00p1
  VG Name               vg
  PV Size               5.09 TB / not usable 1013.97 MB
  Allocatable           yes
  PE Size (KByte)       2097152
  Total PE              2606
  Free PE               2606
  Allocated PE          0
  PV UUID               eNB9Fv-ahAn-UiEd-cYfq-sNX1-Qy4w-JNICWp

# vgdisplay
  WARNING: Locking disabled. Be careful! This could corrupt your metadata.
  --- Volume group ---
  VG Name               vg
  System ID
  Format                lvm2
  Metadata Areas        3
  Metadata Sequence No  3
  VG Access             read/write
  VG Status             resizable
  Clustered             yes
  Shared                no
  MAX LV                0
  Cur LV                1
  Open LV               0
  Max PV                0
  Cur PV                3
  Act PV                3
  VG Size               24.18 TB
  PE Size               2.00 GB
  Total PE              12382
  Alloc PE / Size       9776 / 19.09 TB
  Free  PE / Size       2606 / 5.09 TB
  VG UUID               XbgBCY-D156-RuB5-ZBvs-QGbc-aP10-9CMUbx

# lvdisplay
  WARNING: Locking disabled. Be careful! This could corrupt your metadata.
  --- Logical volume ---
  LV Name                /dev/vg/20T
  VG Name                vg
  LV UUID                gWOfeZ-23Sk-lCae-BhBd-RI0K-Qnuv-i2Zz0Z
  LV Write Access        read/write
  LV Status              available
  # open                 0
  LV Size                19.09 TB
  Current LE             9776
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     512
  Block device           252:6

# lvextend -v -l 100%VG /dev/vg/20T
  WARNING: Locking disabled. Be careful! This could corrupt your metadata.
    Finding volume group vg
  Using stripesize of last segment 128.00 KB
    Archiving volume group "vg" metadata (seqno 3).
  Extending logical volume 20T to 24.18 TB
  Insufficient suitable allocatable extents for logical volume 20T:
2606 more required

ok so let's try:

porpoise ~ # lvextend -v -i 1 -l 100%VG /dev/vg/20T
  WARNING: Locking disabled. Be careful! This could corrupt your metadata.
    Finding volume group vg
    Archiving volume group "vg" metadata (seqno 3).
  Extending logical volume 20T to 24.18 TB
    Creating volume group backup "/etc/lvm/backup/vg" (seqno 4).
    Found volume group "vg"
    Found volume group "vg"
    Loading vg-20T table
    Suspending vg-20T (252:6) without device flush
    Found volume group "vg"
    Resuming vg-20T (252:6)
  Logical volume 20T successfully resized

worked, then:

porpoise ~ # lvdisplay
  WARNING: Locking disabled. Be careful! This could corrupt your metadata.
  --- Logical volume ---
  LV Name                /dev/vg/20T
  VG Name                vg
  LV UUID                gWOfeZ-23Sk-lCae-BhBd-RI0K-Qnuv-i2Zz0Z
  LV Write Access        read/write
  LV Status              available
  # open                 0
  LV Size                24.18 TB
  Current LE             12382
  Segments               2
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     512
  Block device           252:6

Let's try to resize the partition:

porpoise ~ # tunefs.ocfs2 -S /dev/vg/20T
tunefs.ocfs2 1.3.9
y

Changing volume size from 5125439488 blocks to 6491734016 blocks
Proceed (y/N): Resized volume
Wrote Superblock

/dev/mapper/vg-20T    5.1T  180M  5.1T   1% /mnt/ocfs2

So that didn't exactly go as planned. Any thoughts on what to modify
in resize.c or elsewhere?

Thanks,
Sabuj