different log info for mkfs.xfs and xfs_growfs

[Wengang Wang <wen.gang.wang@xxxxxxxxxx>]

Hi experts,

I just noticed that the log info is different for mkfs.xfs and
xfs_growfs.

[root@desk test-xfsprogs]# mkfs.xfs -llogdev=/dev/sda11,size=32768b
/dev/sda10 -f
meta-data=/dev/sda10             isize=256    agcount=4, agsize=1250558
blks
         =                       sectsz=512   attr=2
data     =                       bsize=4096   blocks=5002231, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0
log      =/dev/sda11             bsize=4096   blocks=32768, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=0
realtime =none                   extsz=4096   blocks=0, rtextents=0
[root@desk test-xfsprogs]# mount -ologdev=/dev/sda11 /dev/sda10 /xfs
[root@desk test-xfsprogs]# xfs_growfs -n /xfs 
meta-data=/dev/sda10             isize=256    agcount=4, agsize=1250558
blks
         =                       sectsz=512   attr=2
data     =                       bsize=4096   blocks=5002231, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0
log      =external               bsize=4096   blocks=32768, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=0
realtime =none                   extsz=4096   blocks=0, rtextents=0

So xfs_growfs is simply reporting external.

Why there is such a difference? And how get to know the log device name after it
is mounted?

It's 3.0.0 of xfsprogs. I failed to test with upstream because of the
comlilation error:
[wwg@desk xfsprogs.git]$ make
Building include
Building libxfs
    [DEP]
/usr/bin/makedepend: warning:  ignoring option -Wall
/usr/bin/makedepend: error:  cannot open "no-strict-aliasing"
    [LD]     libxfs.la
libtool: link: only absolute run-paths are allowed
gmake[2]: *** [libxfs.la] Error 1
gmake[1]: *** [libxfs] Error 2
make: *** [default] Error 2

regards,
wengang.