[debbugs-tracker] bug#11406: closed (Bug? df uses f_bsize instead of f_frsize to calculate file system sizes)

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Your message dated Wed, 16 May 2012 00:50:52 +0100
with message-id <address@hidden>
and subject line Re: bug#11406: Bug? df uses f_bsize instead of f_frsize to 
calculate file system sizes
has caused the debbugs.gnu.org bug report #11406,
regarding Bug? df uses f_bsize instead of f_frsize to calculate file system 
sizes
to be marked as done.

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11406: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=11406
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> --- Begin Message ---
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> Subject: 
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> Bug? df uses f_bsize instead of f_frsize to calculate file system	sizes
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> Date: 
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> Fri, 04 May 2012 10:39:44 -0400
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> User-agent: 
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> Mozilla/5.0 (X11; Linux x86_64;	rv:10.0.3) Gecko/20120329 Icedove/10.0.3
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> Hello,
>
> >From statvfs(3):
>
>            struct statvfs {
>                unsigned long  f_bsize;    /* file system block size */
>                unsigned long  f_frsize;   /* fragment size */
>                fsblkcnt_t     f_blocks;   /* size of fs in f_frsize units */
>                fsblkcnt_t     f_bfree;    /* # free blocks */
>                fsblkcnt_t     f_bavail;   /* # free blocks for unprivileged 
> users */
>                ....
>            }
>
> So the size of a file system is f_blocks * f_frsize. For the
> file system mounted at mnt, the values are
>
> # python
> >>> import os
> >>> os.statvfs('mnt')
> posix.statvfs_result(f_bsize=4, f_frsize=10485760, f_blocks=104857, 
> f_bfree=104856, f_bavail=104856, f_files=1000000, f_ffree=999996, 
> f_favail=999996, f_flag=4102, f_namemax=0)
>
> So the file system size is 10485760 * 104857 = 1 TB. df, however, reports:
>
> # df mnt
> Filesystem                        1K-blocks  Used Available Use% Mounted on
> local:///home/nikratio/tmp/bucket       410     1       410   1% 
> /home/nikratio/tmp/mnt
>
> # df --version
> df (GNU coreutils) 8.13
> [...]
>
> This has apparently been calculated using f_bsize, since
> f_bsize * f_blocks = 409k.
>
>
> The same problem applies to f_bfree and f_bavail. I believe that in all cases, 
> df should
> use f_frsize rather than f_bsize to calculate the size in bytes.
>
> Am I missing something?
>
> Best,
>
>    -Nikolaus
>
> -- 
>  »Time flies like an arrow, fruit flies like a Banana.«
>
>   PGP fingerprint: 5B93 61F8 4EA2 E279 ABF6  02CF A9AD B7F8 AE4E 425C
>
>
>
> --- End Message ---
> --- Begin Message ---
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>
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> Subject: 
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> Re: bug#11406: Bug? df uses f_bsize instead of f_frsize to calculate	file system sizes
>
>
>
>
> Date: 
>
> Wed, 16 May 2012 00:50:52 +0100
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>
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> User-agent: 
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> Mozilla/5.0 (X11; Linux x86_64;	rv:6.0) Gecko/20110816 Thunderbird/6.0
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>
>
>
> On 05/15/2012 11:45 PM, Nikolaus Rath wrote:
> > Yes, that works nicely.
> > 
> > # src/stat -f ~/tmp/mnt
> >   File: "/home/nikratio/tmp/mnt"
> >     ID: 0        Namelen: 0       Type: fuseblk
> > Block size: 8192       Fundamental block size: 4096
> > Blocks: Total: 268435456  Free: 268435456  Available: 268435456
> > Inodes: Total: 1000000    Free: 999997
> > 
> > # /usr/bin/stat -f ~/tmp/mnt
> >   File: "/home/nikratio/tmp/mnt"
> >     ID: 0        Namelen: 0       Type: fuseblk
> > Block size: 8192       Fundamental block size: 8192
> > Blocks: Total: 268435456  Free: 268435456  Available: 268435456
> > Inodes: Total: 1000000    Free: 999997
>
> Pushed.
>
> http://git.sv.gnu.org/gitweb/?p=gnulib.git;a=commit;h=c25bdb
> http://git.sv.gnu.org/gitweb/?p=gnulib.git;a=commit;h=b1fac3
> http://git.sv.gnu.org/gitweb/?p=coreutils.git;a=commit;h=0863f01
>
> thanks again,
> Pádraig.
>
>
> --- End Message ---