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-rw-r--r--fs/nfs/fscache.h34
1 files changed, 34 insertions, 0 deletions
diff --git a/fs/nfs/fscache.h b/fs/nfs/fscache.h
index 8b4299a0ad61..e29613a8cbd2 100644
--- a/fs/nfs/fscache.h
+++ b/fs/nfs/fscache.h
@@ -83,6 +83,31 @@ extern void nfs_fscache_zap_inode_cookie(struct inode *);
extern void nfs_fscache_set_inode_cookie(struct inode *, struct file *);
extern void nfs_fscache_reset_inode_cookie(struct inode *);
+extern void __nfs_fscache_invalidate_page(struct page *, struct inode *);
+extern int nfs_fscache_release_page(struct page *, gfp_t);
+
+/*
+ * wait for a page to complete writing to the cache
+ */
+static inline void nfs_fscache_wait_on_page_write(struct nfs_inode *nfsi,
+ struct page *page)
+{
+ if (PageFsCache(page))
+ fscache_wait_on_page_write(nfsi->fscache, page);
+}
+
+/*
+ * release the caching state associated with a page if undergoing complete page
+ * invalidation
+ */
+static inline void nfs_fscache_invalidate_page(struct page *page,
+ struct inode *inode)
+{
+ if (PageFsCache(page))
+ __nfs_fscache_invalidate_page(page, inode);
+}
+
+
#else /* CONFIG_NFS_FSCACHE */
static inline int nfs_fscache_register(void) { return 0; }
static inline void nfs_fscache_unregister(void) {}
@@ -104,5 +129,14 @@ static inline void nfs_fscache_set_inode_cookie(struct inode *inode,
struct file *filp) {}
static inline void nfs_fscache_reset_inode_cookie(struct inode *inode) {}
+static inline int nfs_fscache_release_page(struct page *page, gfp_t gfp)
+{
+ return 1; /* True: may release page */
+}
+static inline void nfs_fscache_invalidate_page(struct page *page,
+ struct inode *inode) {}
+static inline void nfs_fscache_wait_on_page_write(struct nfs_inode *nfsi,
+ struct page *page) {}
+
#endif /* CONFIG_NFS_FSCACHE */
#endif /* _NFS_FSCACHE_H */