linux-kernel - [PATCH 04/30] VFS: Add forget_all_cached

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Message-Id: <1259158975-28499-5-git-send-email-swhiteho@redhat.com>
Date:	Wed, 25 Nov 2009 14:22:29 +0000
From:	Steven Whitehouse <swhiteho@...hat.com>
To:	linux-kernel@...r.kernel.org, cluster-devel@...hat.com
Cc:	Steven Whitehouse <swhiteho@...hat.com>,
	Alexander Viro <aviro@...hat.com>,
	Christoph Hellwig <hch@...radead.org>
Subject: [PATCH 04/30] VFS: Add forget_all_cached_acls()

This is required for cluster filesystems which want to use
cached ACLs so that they can invalidate the cache when
required.

Signed-off-by: Steven Whitehouse <swhiteho@...hat.com>
Cc: Alexander Viro <aviro@...hat.com>
Cc: Christoph Hellwig <hch@...radead.org>
---
 include/linux/posix_acl.h |   14 ++++++++++++++
 1 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/include/linux/posix_acl.h b/include/linux/posix_acl.h
index 065a365..6760816 100644
--- a/include/linux/posix_acl.h
+++ b/include/linux/posix_acl.h
@@ -147,6 +147,20 @@ static inline void forget_cached_acl(struct inode *inode, int type)
 	if (old != ACL_NOT_CACHED)
 		posix_acl_release(old);
 }
+
+static inline void forget_all_cached_acls(struct inode *inode)
+{
+	struct posix_acl *old_access, *old_default;
+	spin_lock(&inode->i_lock);
+	old_access = inode->i_acl;
+	old_default = inode->i_default_acl;
+	inode->i_acl = inode->i_default_acl = ACL_NOT_CACHED;
+	spin_unlock(&inode->i_lock);
+	if (old_access != ACL_NOT_CACHED)
+		posix_acl_release(old_access);
+	if (old_default != ACL_NOT_CACHED)
+		posix_acl_release(old_default);
+}
 #endif
 
 static inline void cache_no_acl(struct inode *inode)
-- 
1.6.2.5

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