linux-kernel - [PATCH 1/2] ceph fscache: Introduce a routine for uncaching single no data page from fscache

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Message-Id: <65d023ce80c02fd37fcd2e88dc9c01f4959c574c.1387461299.git.liwang@ubuntukylin.com>
Date:	Thu, 19 Dec 2013 06:03:48 -0800
From:	Li Wang <liwang@...ntukylin.com>
To:	ceph-devel@...r.kernel.org
Cc:	Sage Weil <sage@...tank.com>, Milosz Tanski <milosz@...in.com>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	Li Wang <liwang@...ntukylin.com>
Subject: [PATCH 1/2] ceph fscache: Introduce a routine for uncaching single no data page from fscache


Signed-off-by: Li Wang <liwang@...ntukylin.com>
---
 fs/ceph/cache.h |   13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/fs/ceph/cache.h b/fs/ceph/cache.h
index ba94940..da95f61 100644
--- a/fs/ceph/cache.h
+++ b/fs/ceph/cache.h
@@ -67,6 +67,14 @@ static inline int ceph_release_fscache_page(struct page *page, gfp_t gfp)
 	return fscache_maybe_release_page(ci->fscache, page, gfp);
 }
 
+static inline void ceph_fscache_readpage_cancel(struct inode *inode,
+						struct page *page)
+{
+	struct ceph_inode_info *ci = ceph_inode(inode);
+	if (fscache_cookie_valid(ci->fscache) && PageFsCache(page))
+		__fscache_uncache_page(ci->fscache, page);
+}
+
 static inline void ceph_fscache_readpages_cancel(struct inode *inode,
 						 struct list_head *pages)
 {
@@ -145,6 +153,11 @@ static inline int ceph_release_fscache_page(struct page *page, gfp_t gfp)
 	return 1;
 }
 
+static inline void ceph_fscache_readpage_cancel(struct inode *inode,
+						struct page *page)
+{
+}
+
 static inline void ceph_fscache_readpages_cancel(struct inode *inode,
 						 struct list_head *pages)
 {
-- 
1.7.9.5

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