cifs: read pages from FS-Cache
Read pages from a FS-Cache data storage object into a CIFS inode.
Signed-off-by: Suresh Jayaraman <sjayaraman@suse.de>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/fscache.h b/fs/cifs/fscache.h
index 1a00d70..79164c6 100644
--- a/fs/cifs/fscache.h
+++ b/fs/cifs/fscache.h
@@ -32,7 +32,6 @@
extern const struct fscache_cookie_def cifs_fscache_super_index_def;
extern const struct fscache_cookie_def cifs_fscache_inode_object_def;
-
extern int cifs_fscache_register(void);
extern void cifs_fscache_unregister(void);
@@ -50,6 +49,11 @@
extern void __cifs_fscache_invalidate_page(struct page *, struct inode *);
extern int cifs_fscache_release_page(struct page *page, gfp_t gfp);
+extern int __cifs_readpage_from_fscache(struct inode *, struct page *);
+extern int __cifs_readpages_from_fscache(struct inode *,
+ struct address_space *,
+ struct list_head *,
+ unsigned *);
extern void __cifs_readpage_to_fscache(struct inode *, struct page *);
@@ -60,6 +64,26 @@
__cifs_fscache_invalidate_page(page, inode);
}
+static inline int cifs_readpage_from_fscache(struct inode *inode,
+ struct page *page)
+{
+ if (CIFS_I(inode)->fscache)
+ return __cifs_readpage_from_fscache(inode, page);
+
+ return -ENOBUFS;
+}
+
+static inline int cifs_readpages_from_fscache(struct inode *inode,
+ struct address_space *mapping,
+ struct list_head *pages,
+ unsigned *nr_pages)
+{
+ if (CIFS_I(inode)->fscache)
+ return __cifs_readpages_from_fscache(inode, mapping, pages,
+ nr_pages);
+ return -ENOBUFS;
+}
+
static inline void cifs_readpage_to_fscache(struct inode *inode,
struct page *page)
{
@@ -90,6 +114,20 @@
static inline int cifs_fscache_invalidate_page(struct page *page,
struct inode *) {}
+static inline int
+cifs_readpage_from_fscache(struct inode *inode, struct page *page)
+{
+ return -ENOBUFS;
+}
+
+static inline int cifs_readpages_from_fscache(struct inode *inode,
+ struct address_space *mapping,
+ struct list_head *pages,
+ unsigned *nr_pages)
+{
+ return -ENOBUFS;
+}
+
static inline void cifs_readpage_to_fscache(struct inode *inode,
struct page *page) {}