lkml.org 
[lkml]   [2003]   [Nov]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: seq_file and exporting dynamically allocated data
On Sat, Nov 15, 2003 at 06:33:10PM +0100, Harald Welte wrote:
> On Sat, Nov 15, 2003 at 05:18:44PM +0000, viro@parcelfarce.linux.theplanet.co.uk wrote:
> > On Sat, Nov 15, 2003 at 10:38:33AM +0100, Harald Welte wrote:
> > > that doesn't help. As I am aware, the seq_file structure is only
> > > allocated in the seq_open() call. How does seq_open() know which
> > > private data (i.e. hash table) to associate with struct file?
> >
> > Why should seq_open() know that? Its caller does and it can set the damn
> > thing to whatever it wants.
>
> So who is the caller? it's the ->open() member of struct
> file_operations. and struct file_operations doesn't have some private
> member where I could hide my pointer before saving it to
> seq_file.private in seq_open().

If arguments of ->open() were not enough to find your data, how the hell would
current code manage to find it?

You've got inode; you've got (if that's on procfs) proc_dir_entry - from
inode; you've got dentry (from struct file *). If that's not enough to
find your data, what is?

Which files do you have in mind?
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:58    [from the cache]
©2003-2011 Jasper Spaans