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authorSuresh Jayaraman <sjayaraman@suse.de>2010-07-05 18:13:25 +0530
committerSteve French <sfrench@us.ibm.com>2010-08-02 12:40:37 +0000
commit56698236e1294848c63d4768673865ae5a9c69e0 (patch)
treece6d43104a236595763759fe68c26ca3089abdd1 /fs/cifs/fscache.h
parent9dc06558c223bbc08290917ac44c25963bc09e43 (diff)
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>
Diffstat (limited to 'fs/cifs/fscache.h')
-rw-r--r--fs/cifs/fscache.h40
1 files changed, 39 insertions, 1 deletions
diff --git a/fs/cifs/fscache.h b/fs/cifs/fscache.h
index 1a00d70bca9..79164c66797 100644
--- a/fs/cifs/fscache.h
+++ b/fs/cifs/fscache.h
@@ -32,7 +32,6 @@ extern const struct fscache_cookie_def cifs_fscache_server_index_def;
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_reset_inode_cookie(struct inode *);
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 @@ static inline void cifs_fscache_invalidate_page(struct page *page,
__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 void cifs_fscache_release_page(struct page *page, gfp_t gfp)
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) {}