1 files changed, 11 insertions, 1 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 6d6226732c93..9a593ef262ef 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -264,6 +264,7 @@ typedef void (dio_iodone_t)(struct kiocb *iocb, loff_t offset,
 #define ATTR_ATTR_FLAG  1024
 #define ATTR_KILL_SUID  2048
 #define ATTR_KILL_SGID  4096
+#define ATTR_FILE       8192
 
 /*
  * This is the Inode Attributes structure, used for notify_change().  It
@@ -283,6 +284,13 @@ struct iattr {
         struct timespec ia_atime;
         struct timespec ia_mtime;
         struct timespec ia_ctime;
+
+        /*
+         * Not an attribute, but an auxilary info for filesystems wanting to
+         * implement an ftruncate() like method.  NOTE: filesystem should
+         * check for (ia_valid & ATTR_FILE), and not for (ia_file != NULL).
+         */
+        struct file     *ia_file;
 };
 
 /*
@@ -1088,6 +1096,8 @@ int sync_inode(struct inode *inode, struct writeback_control *wbc);
  * @get_name:       find the name for a given inode in a given directory
  * @get_parent:     find the parent of a given directory
  * @get_dentry:     find a dentry for the inode given a file handle sub-fragment
+ * @find_exported_dentry:
+ *      set by the exporting module to a standard helper function.
  *
  * Description:
  *    The export_operations structure provides a means for nfsd to communicate
@@ -1288,7 +1298,7 @@ static inline int break_lease(struct inode *inode, unsigned int mode)
 
 /* fs/open.c */
 
-extern int do_truncate(struct dentry *, loff_t start);
+extern int do_truncate(struct dentry *, loff_t start, struct file *filp);
 extern long do_sys_open(const char __user *filename, int flags, int mode);
 extern struct file *filp_open(const char *, int, int);
 extern struct file * dentry_open(struct dentry *, struct vfsmount *, int);