From aae5d55a24f74d429f32895cf73b9839d0d5e6e1 Mon Sep 17 00:00:00 2001 From: Oleg Drokin Date: Mon, 20 Jun 2016 16:55:46 -0400 Subject: [PATCH] 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 Signed-off-by: Greg Kroah-Hartman --- drivers/staging/lustre/lustre/llite/dcache.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/staging/lustre/lustre/llite/dcache.c b/drivers/staging/lustre/lustre/llite/dcache.c index d964f4f..581a63a 100644 --- a/drivers/staging/lustre/lustre/llite/dcache.c +++ b/drivers/staging/lustre/lustre/llite/dcache.c @@ -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+ /* If this is intermediate component path lookup and we were able to get + * to this dentry, then its lock has not been revoked and the + * path component is valid.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 -- 2.7.4