Re: [9fans] 9pserve question

[erik quanstrom <quanstro@quanstro.net>]

good question.

i believe that this is the problem -- and it's not specific to the linux
9p "filesystem. fs/namei.c has this function which is called when trying
to open a file:

i didn't follow up on what put_write_access() does but i'm betting that
that generates the wstat.

  1324	int may_open(struct nameidata *nd, int acc_mode, int flag)
  1325	{
[...]
  1379		if (flag & O_TRUNC) {
  1380			error = get_write_access(inode);
  1381			if (error)
  1382				return error;
  1383	
  1384			/*
  1385			 * Refuse to truncate files with mandatory locks held on them.
  1386			 */
  1387			error = locks_verify_locked(inode);
  1388			if (!error) {
  1389				DQUOT_INIT(inode);
  1390				
  1391				error = do_truncate(dentry, 0);
  1392			}
  1393			put_write_access(inode);
  1394			if (error)
  1395				return error;
[...]

- erik

Michael Baldwin <michael@cibernet.com> writes

| 
| why is it doing Tstat and Twstat at all?   i would have thought it  
| would be Twalk, Topen, Twrite.