ceph fscache: Introduce a routine for uncaching single no data page from fscache

Signed-off-by: Li Wang <liwang@ubuntukylin.com>
Reviewed-by: Milosz Tanski <milosz@adfin.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/fs/ceph/cache.h b/fs/ceph/cache.h
index ba949408a336..da95f61b7a09 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)
 {