Add support for XFS custom block sizes

[ConnorJC3]

XFS requires "size=" prepended to the size passsed to -b for mkfs.xfs

[torredil]

SC:

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: ebs-sc
provisioner: ebs.csi.aws.com
volumeBindingMode: WaitForFirstConsumer
parameters:
  blocksize: "4096"
  csi.storage.k8s.io/fstype: xfs

Without this change:

  Warning  FailedMount             10s (x7 over 42s)  kubelet                  MountVolume.MountDevice failed for volume "pvc-e810709a-cdc4-4f9a-857f-c2f952176f40" : rpc error: code = Internal desc = could not format "/dev/nvme1n1" and mount it at "/var/lib/kubelet/plugins/kubernetes.io/csi/ebs.csi.aws.com/662d547f3795c6f2ff978110909cf16c03480fc9a2420e9f496bff7487ae3a48/globalmount": format of disk "/dev/nvme1n1" failed: type:("xfs") target:("/var/lib/kubelet/plugins/kubernetes.io/csi/ebs.csi.aws.com/662d547f3795c6f2ff978110909cf16c03480fc9a2420e9f496bff7487ae3a48/globalmount") options:("nouuid,defaults") errcode:(exit status 1) output:(unknown option -b 3535
Usage: mkfs.xfs
/* blocksize */          [-b size=num]
/* metadata */           [-m crc=0|1,finobt=0|1,uuid=xxx,rmapbt=0|1,reflink=0|1,
                               inobtcount=0|1,bigtime=0|1]
/* data subvol */      [-d agcount=n,agsize=n,file,name=xxx,size=num,
                               (sunit=value,swidth=value|su=num,sw=num|noalign),
                               sectsize=num
/* force overwrite */  [-f]
/* inode size */       [-i log=n|perblock=n|size=num,maxpct=n,attr=0|1|2,
                               projid32bit=0|1,sparse=0|1]
/* no discard */       [-K]
/* log subvol */       [-l agnum=n,internal,size=num,logdev=xxx,version=n
                               sunit=value|su=num,sectsize=num,lazy-count=0|1]
/* label */              [-L label (maximum 12 characters)]
/* naming */             [-n size=num,version=2|ci,ftype=0|1]
/* no-op info only */  [-N]
/* prototype file */   [-p fname]
/* quiet */              [-q]
/* realtime subvol */  [-r extsize=num,size=num,rtdev=xxx]
/* sectorsize */       [-s size=num]
/* version */            [-V]
                           devicename
<devicename> is required unless -d name=xxx is given.
<num> is xxx (bytes), xxxs (sectors), xxxb (fs blocks), xxxk (xxx KiB),
      xxxm (xxx MiB), xxxg (xxx GiB), xxxt (xxx TiB) or xxxp (xxx PiB).
<value> is xxx (512 byte blocks).
)

With this change:

Normal   Started                 0s    kubelet                  Started container app

$ kubectl exec --stdin --tty app -- /bin/bash

$ root@app:/# stat -f /data
  File: "/data"
    ID: 1030300000000 Namelen: 255     Type: xfs
Block size: 4096       Fundamental block size: 4096
Blocks: Total: 1046016    Free: 1030435    Available: 1030435
Inodes: Total: 2097152    Free: 2097148

/lgtm

[k8s-ci-robot]

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This pull-request has been approved by: torredil, wmesard

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