1 files changed, 35 insertions, 4 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index e0b77c5af9..cc35b6ac77 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -104,6 +104,10 @@ extern int dir_notify_enable;
 #define MS_MOVE         8192
 #define MS_REC          16384
 #define MS_VERBOSE      32768
+#define MS_UNBINDABLE   (1<<17) /* change to unbindable */
+#define MS_PRIVATE      (1<<18) /* change to private */
+#define MS_SLAVE        (1<<19) /* change to slave */
+#define MS_SHARED       (1<<20) /* change to shared */
 #define MS_POSIXACL     (1<<16) /* VFS does not apply the umask */
 #define MS_ACTIVE       (1<<30)
 #define MS_NOUSER       (1<<31)
@@ -264,6 +268,7 @@ 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 +288,13 @@ 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;
 };
 
 /*
@@ -320,7 +332,7 @@ struct address_space_operations {
         /* Unfortunately this kludge is needed for FIBMAP. Don't use it */
         sector_t (*bmap)(struct address_space *, sector_t);
         int (*invalidatepage) (struct page *, unsigned long);
-        int (*releasepage) (struct page *, int);
+        int (*releasepage) (struct page *, gfp_t);
         ssize_t (*direct_IO)(int, struct kiocb *, const struct iovec *iov,
                         loff_t offset, unsigned long nr_segs);
         struct page* (*get_xip_page)(struct address_space *, sector_t,
@@ -574,7 +586,14 @@ struct file_ra_state {
 #define RA_FLAG_INCACHE 0x02    /* file is already in cache */
 
 struct file {
-        struct list_head        f_list;
+        /*
+         * fu_list becomes invalid after file_free is called and queued via
+         * fu_rcuhead for RCU freeing
+         */
+        union {
+                struct list_head        fu_list;
+                struct rcu_head         fu_rcuhead;
+        } f_u;
         struct dentry           *f_dentry;
         struct vfsmount         *f_vfsmnt;
         struct file_operations  *f_op;
@@ -598,7 +617,6 @@ struct file {
         spinlock_t              f_ep_lock;
 #endif /* #ifdef CONFIG_EPOLL */
         struct address_space    *f_mapping;
-        struct rcu_head         f_rcuhead;
 };
 extern spinlock_t files_lock;
 #define file_list_lock() spin_lock(&files_lock);
@@ -856,6 +874,7 @@ static inline void unlock_super(struct super_block * sb)
 /*
  * VFS helper functions..
  */
+extern int vfs_permission(struct nameidata *, int);
 extern int vfs_create(struct inode *, struct dentry *, int, struct nameidata *);
 extern int vfs_mkdir(struct inode *, struct dentry *, int);
 extern int vfs_mknod(struct inode *, struct dentry *, int, dev_t);
@@ -871,6 +890,11 @@ extern int vfs_rename(struct inode *, struct dentry *, struct inode *, struct de
 extern void dentry_unhash(struct dentry *dentry);
 
 /*
+ * VFS file helper functions.
+ */
+extern int file_permission(struct file *, int);
+
+/*
  * File types
  *
  * NOTE! These match bits 12..15 of stat.st_mode
@@ -1082,6 +1106,8 @@ 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
@@ -1233,7 +1259,12 @@ extern int unregister_filesystem(struct file_system_type *);
 extern struct vfsmount *kern_mount(struct file_system_type *);
 extern int may_umount_tree(struct vfsmount *);
 extern int may_umount(struct vfsmount *);
+extern void umount_tree(struct vfsmount *, int, struct list_head *);
+extern void release_mounts(struct list_head *);
 extern long do_mount(char *, char *, char *, unsigned long, void *);
+extern struct vfsmount *copy_tree(struct vfsmount *, struct dentry *, int);
+extern void mnt_set_mountpoint(struct vfsmount *, struct dentry *,
+                                  struct vfsmount *);
 
 extern int vfs_statfs(struct super_block *, struct kstatfs *);
 
@@ -1282,7 +1313,7 @@ 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);