Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1427051

[PATCH v2 23/29] staging/lustre/llite: ll_revalidate_dentry update

Show all headers | View raw

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+	 * to this dentry, then its lock has not been revoked and the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

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH v2 00/29] Lustre fixes Oleg Drokin <green@linuxhacker.ru> - 2016-06-20 23:10 +0200
  [PATCH v2 23/29] staging/lustre/llite: ll_revalidate_dentry update Oleg Drokin <green@linuxhacker.ru> - 2016-06-20 23:10 +0200
  [PATCH v2 24/29] staging/lustre/llite: IOC_MDC_GETFILEINFO returns the wrong ino Oleg Drokin <green@linuxhacker.ru> - 2016-06-20 23:20 +0200
  [PATCH v2 05/29] staging/lustre/osc: osc_lock_weight endless loop fix Oleg Drokin <green@linuxhacker.ru> - 2016-06-20 23:20 +0200
  [PATCH v2 18/29] staging/lustre/ldlm: const qualify struct lustre_handle * params Oleg Drokin <green@linuxhacker.ru> - 2016-06-20 23:20 +0200
  [PATCH v2 17/29] staging/lustre/llite: change it_data to it_request Oleg Drokin <green@linuxhacker.ru> - 2016-06-20 23:20 +0200
  [PATCH v2 27/29] staging/lustre/osc: glimpse lock should match only with granted locks Oleg Drokin <green@linuxhacker.ru> - 2016-06-20 23:20 +0200
  [PATCH v2 08/29] staging/lustre/ptlrpc: missing wakeup for ptlrpc_check_set Oleg Drokin <green@linuxhacker.ru> - 2016-06-20 23:20 +0200
  [PATCH v2 22/29] staging/lustre/llite: Restore proper opencache operations Oleg Drokin <green@linuxhacker.ru> - 2016-06-20 23:20 +0200
  [PATCH v2 04/29] staging/lustre/llite: lock i_lock before __d_drop() Oleg Drokin <green@linuxhacker.ru> - 2016-06-20 23:20 +0200
  [PATCH v2 01/29] staging/lustre/llite: allocate and free client cache asynchronously Oleg Drokin <green@linuxhacker.ru> - 2016-06-20 23:20 +0200
  [PATCH v2 28/29] staging/lustre/libcfs: Do not call kthread_run in wrong state Oleg Drokin <green@linuxhacker.ru> - 2016-06-21 00:10 +0200
  [PATCH v2 06/29] staging/lustre/osc: Fix reverted condition in osc_lock_weight Oleg Drokin <green@linuxhacker.ru> - 2016-06-21 00:10 +0200
  [PATCH v2 07/29] staging/lustre/ptlrpc: reorganize ptlrpc_request Oleg Drokin <green@linuxhacker.ru> - 2016-06-21 00:10 +0200

csiph-web