[issue1401] statvfs(2) reports wrapped sizes for large nfs file systems

["Simon 'corecode' Schubert \(via DragonFly issue tracker\)" <sinknull@xxxxxxxxxxxxxxxxxxxxx>]

New submission from Simon 'corecode' Schubert <corecode@fs.ei.tum.de>:

nfs only implements vfs_statfs and relies on the vfs_stdstatvfs wrapper to
provide a statvfs interface.

NFSv3 provides 64 bit values for free and available blocks, but the statfs
structure it fills uses only signed longs.  As a result, these values get
cropped and later written back into a 64 bit integer in the statvfs struct,
leading to incorrect information.

nfs needs to implement both statfs and statvfs to fix this.

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messages: 6740
nosy: corecode
priority: bug
status: unread
title: statvfs(2) reports wrapped sizes for large nfs file systems

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