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| author | Oleg Drokin <oleg.drokin@intel.com> | 2016-06-20 23:55:46 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-06-21 00:28:39 +0300 |
| commit | aae5d55a24f74d429f32895cf73b9839d0d5e6e1 (patch) | |
| tree | 5933f782a31a1ff08df7d614ec8adf4db5e3b111 /drivers/staging | |
| parent | 6dad4d8903a43b0e34d9527e54a52737b0f69690 (diff) | |
| download | linux-aae5d55a24f74d429f32895cf73b9839d0d5e6e1.tar.xz | |
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>
Diffstat (limited to 'drivers/staging')
| -rw-r--r-- | drivers/staging/lustre/lustre/llite/dcache.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/llite/dcache.c b/drivers/staging/lustre/lustre/llite/dcache.c index d964f4f30baa..581a63a0a63e 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+ /* If this is intermediate component path lookup and we were able to get + * to this dentry, then its lock has not been revoked and the + * path component is valid.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 |