fs/9p: Add v9fs_inode

Switch to the fscache code to v9fs_inode. We will later use
v9fs_inode in cache=loose mode to track the inode cache
validity timeout. Ie if we find an inode in cache older
that a specific jiffie range we will consider it stale

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>

1 files changed, 25 insertions, 12 deletions

diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h
index 21bd803a3cc0..ce59d1512062 100644
--- a/fs/9p/v9fs.h
+++ b/fs/9p/v9fs.h
@@ -116,6 +116,20 @@ struct v9fs_session_info {
 	struct p9_fid *root_fid; /* Used for file system sync */
 };
 
+struct v9fs_inode {
+#ifdef CONFIG_9P_FSCACHE
+	spinlock_t fscache_lock;
+	struct fscache_cookie *fscache;
+	struct p9_qid *fscache_key;
+#endif
+	struct inode vfs_inode;
+};
+
+static inline struct v9fs_inode *V9FS_I(const struct inode *inode)
+{
+	return container_of(inode, struct v9fs_inode, vfs_inode);
+}
+
 struct p9_fid *v9fs_session_init(struct v9fs_session_info *, const char *,
 									char *);
 extern void v9fs_session_close(struct v9fs_session_info *v9ses);
@@ -129,16 +143,15 @@ extern int v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
 			struct inode *new_dir, struct dentry *new_dentry);
 extern void v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd,
 			void *p);
-extern struct inode *v9fs_inode(struct v9fs_session_info *v9ses,
-			struct p9_fid *fid,
-			struct super_block *sb);
-
+extern struct inode *v9fs_inode_from_fid(struct v9fs_session_info *v9ses,
+					 struct p9_fid *fid,
+					 struct super_block *sb);
 extern const struct inode_operations v9fs_dir_inode_operations_dotl;
 extern const struct inode_operations v9fs_file_inode_operations_dotl;
 extern const struct inode_operations v9fs_symlink_inode_operations_dotl;
-extern struct inode *v9fs_inode_dotl(struct v9fs_session_info *v9ses,
-			struct p9_fid *fid,
-			struct super_block *sb);
+extern struct inode *v9fs_inode_from_fid_dotl(struct v9fs_session_info *v9ses,
+					      struct p9_fid *fid,
+					      struct super_block *sb);
 
 /* other default globals */
 #define V9FS_PORT	564
@@ -163,7 +176,7 @@ static inline int v9fs_proto_dotl(struct v9fs_session_info *v9ses)
 }
 
 /**
- * v9fs_inode_from_fid - Helper routine to populate an inode by
+ * v9fs_get_inode_from_fid - Helper routine to populate an inode by
  * issuing a attribute request
  * @v9ses: session information
  * @fid: fid to issue attribute request for
@@ -171,11 +184,11 @@ static inline int v9fs_proto_dotl(struct v9fs_session_info *v9ses)
  *
  */
 static inline struct inode *
-v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
-				struct super_block *sb)
+v9fs_get_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
+			struct super_block *sb)
 {
 	if (v9fs_proto_dotl(v9ses))
-		return v9fs_inode_dotl(v9ses, fid, sb);
+		return v9fs_inode_from_fid_dotl(v9ses, fid, sb);
 	else
-		return v9fs_inode(v9ses, fid, sb);
+		return v9fs_inode_from_fid(v9ses, fid, sb);
 }