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staging/lustre/llite: ll_revalidate_dentry update 

There are a couple of cases in ll_revalidate_dentry() where
we are pretty sure the dentry is valid, so check for them early
and save more expensive checks for later.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Oleg Drokin 2016-06-20 16:55:46 -04:00 committed by Greg Kroah-Hartman
parent 6dad4d8903
commit aae5d55a24
1 changed files with 11 additions and 0 deletions
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11
drivers/staging/lustre/lustre/llite/dcache.c
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@ -302,6 +302,17 @@ static int ll_revalidate_dentry(struct dentry *dentry,
{
struct inode *dir = d_inode(dentry->d_parent);
/* If this is intermediate component path lookup and we were able to get
* to this dentry, then its lock has not been revoked and the
* path component is valid.
*/
if (lookup_flags & LOOKUP_PARENT)
return 1;
/* Symlink - always valid as long as the dentry was found */
if (dentry->d_inode && S_ISLNK(dentry->d_inode->i_mode))
return 1;
/*
* if open&create is set, talk to MDS to make sure file is created if
* necessary, because we can't do this in ->open() later since that's