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Neuter linux_ustat() until somebody finds time to try to fix it.

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The fundamental problem is that we get only the lower 8 bits of the
minor device number so there is no guarantee that we can actually
find the disk device in question at all.

This was probably a bigger issue pre-GEOM where the upper bits
signaled which slice were in use.

The secondary problem is how we get from (partial) dev_t to vnode.

The correct implementation will involve traversing the mount list
looking for a perfect match or a possible match (for truncated
minor).
This commit is contained in:
Poul-Henning Kamp 2005-02-22 13:39:46 +00:00
parent d21456387e
commit 1e247cc2ce
1 changed files with 9 additions and 4 deletions
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13
sys/compat/linux/linux_stats.c
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@ -285,16 +285,20 @@ struct l_ustat
int
linux_ustat(struct thread *td, struct linux_ustat_args *args)
{
#ifdef DEBUG
if (ldebug(ustat))
printf(ARGS(ustat, "%d, *"), args->dev);
#endif
return (EOPNOTSUPP);
#ifdef not_that_way
struct l_ustat lu;
struct cdev *dev;
struct vnode *vp;
struct statfs *stat;
int error;
#ifdef DEBUG
if (ldebug(ustat))
printf(ARGS(ustat, "%d, *"), args->dev);
#endif
/*
* lu.f_fname and lu.f_fpack are not used. They are always zeroed.
@ -334,6 +338,7 @@ linux_ustat(struct thread *td, struct linux_ustat_args *args)
}
return (copyout(&lu, args->ubuf, sizeof(lu)));
#endif
}
#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))