Messages in this thread Patch in this message | | | From | Oleg Drokin <> | Subject | [PATCH v2 23/29] staging/lustre/llite: ll_revalidate_dentry update | Date | Mon, 20 Jun 2016 16:55:46 -0400 |
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From: Oleg Drokin <oleg.drokin@intel.com>
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> --- 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+ /* If this is intermediate component path lookup and we were able to get + * to this dentry, then its lock has not been revoked and the + * path component is valid.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
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