Alexander Viro writes:
>
>
> On Fri, 23 Mar 2001, Danilov Nikita wrote:
>
> > > Not enough. You'll need to deal with invalidation of procfs entries on umount
> > > and that will be rather painful.
> >
> > What's wrong with remove_proc_entry()?
>
> The fact that in can be called in the middle of read() (or write(), for that
> matter).
Can you clarify this? I thought remove_proc_entry() takes care of this.
As an experiment I created simple stub function (follows).
If I umount fs while read is sleeping, remove_proc_entry() complains
that entry is busy, and after read completes, deletes it (the same holds
for directories).
Nikita.
int reiserfs_blackhole_in_proc( char *buffer, char **start, off_t offset,
int count, int *eof, void *data )
{
extern unsigned long volatile jiffies;
int len = 0;
unsigned long now;
now = jiffies;
while( jiffies < now + 120 * HZ ) {
schedule();
}
len += sprintf( &buffer[ len ], "Thank you for your patience.\n" );
return reiserfs_proc_tail( len, buffer, start, offset, count, eof );
}
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