1 files changed, 90 insertions, 3 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 0180102dace1..047bde30836a 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -213,6 +213,7 @@ extern int dir_notify_enable;
 #include <linux/radix-tree.h>
 #include <linux/prio_tree.h>
 #include <linux/init.h>
+#include <linux/sched.h>
 
 #include <asm/atomic.h>
 #include <asm/semaphore.h>
@@ -220,6 +221,7 @@ extern int dir_notify_enable;
 
 struct iovec;
 struct nameidata;
+struct kiocb;
 struct pipe_inode_info;
 struct poll_table_struct;
 struct kstatfs;
@@ -240,7 +242,7 @@ typedef int (get_block_t)(struct inode *inode, sector_t iblock,
 typedef int (get_blocks_t)(struct inode *inode, sector_t iblock,
                         unsigned long max_blocks,
                         struct buffer_head *bh_result, int create);
-typedef void (dio_iodone_t)(struct inode *inode, loff_t offset,
+typedef void (dio_iodone_t)(struct kiocb *iocb, loff_t offset,
                         ssize_t bytes, void *private);
 
 /*
@@ -302,7 +304,6 @@ struct iattr {
 struct page;
 struct address_space;
 struct writeback_control;
-struct kiocb;
 
 struct address_space_operations {
         int (*writepage)(struct page *page, struct writeback_control *wbc);
@@ -330,6 +331,8 @@ struct address_space_operations {
         int (*releasepage) (struct page *, int);
         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,
+                        int);
 };
 
 struct backing_dev_info;
@@ -581,7 +584,6 @@ struct file {
         atomic_t                f_count;
         unsigned int            f_flags;
         mode_t                  f_mode;
-        int                     f_error;
         loff_t                  f_pos;
         struct fown_struct      f_owner;
         unsigned int            f_uid, f_gid;
@@ -674,6 +676,7 @@ struct file_lock {
         struct lock_manager_operations *fl_lmops;       /* Callbacks for lockmanagers */
         union {
                 struct nfs_lock_info    nfs_fl;
+                struct nfs4_lock_info   nfs4_fl;
         } fl_u;
 };
 
@@ -820,16 +823,34 @@ enum {
 #define vfs_check_frozen(sb, level) \
         wait_event((sb)->s_wait_unfrozen, ((sb)->s_frozen < (level)))
 
+static inline void get_fs_excl(void)
+{
+        atomic_inc(&current->fs_excl);
+}
+
+static inline void put_fs_excl(void)
+{
+        atomic_dec(&current->fs_excl);
+}
+
+static inline int has_fs_excl(void)
+{
+        return atomic_read(&current->fs_excl);
+}
+
+
 /*
  * Superblock locking.
  */
 static inline void lock_super(struct super_block * sb)
 {
+        get_fs_excl();
         down(&sb->s_lock);
 }
 
 static inline void unlock_super(struct super_block * sb)
 {
+        put_fs_excl();
         up(&sb->s_lock);
 }
 
@@ -883,7 +904,9 @@ struct block_device_operations {
         int (*open) (struct inode *, struct file *);
         int (*release) (struct inode *, struct file *);
         int (*ioctl) (struct inode *, struct file *, unsigned, unsigned long);
+        long (*unlocked_ioctl) (struct file *, unsigned, unsigned long);
         long (*compat_ioctl) (struct file *, unsigned, unsigned long);
+        int (*direct_access) (struct block_device *, sector_t, unsigned long *);
         int (*media_changed) (struct gendisk *);
         int (*revalidate_disk) (struct gendisk *);
         struct module *owner;
@@ -1024,6 +1047,7 @@ struct super_operations {
 #define I_FREEING               16
 #define I_CLEAR                 32
 #define I_NEW                   64
+#define I_WILL_FREE             128
 
 #define I_DIRTY (I_DIRTY_SYNC | I_DIRTY_DATASYNC | I_DIRTY_PAGES)
 
@@ -1494,6 +1518,23 @@ extern loff_t remote_llseek(struct file *file, loff_t offset, int origin);
 extern int generic_file_open(struct inode * inode, struct file * filp);
 extern int nonseekable_open(struct inode * inode, struct file * filp);
 
+#ifdef CONFIG_FS_XIP
+extern ssize_t xip_file_read(struct file *filp, char __user *buf, size_t len,
+                             loff_t *ppos);
+extern ssize_t xip_file_sendfile(struct file *in_file, loff_t *ppos,
+                                 size_t count, read_actor_t actor,
+                                 void *target);
+extern int xip_file_mmap(struct file * file, struct vm_area_struct * vma);
+extern ssize_t xip_file_write(struct file *filp, const char __user *buf,
+                              size_t len, loff_t *ppos);
+extern int xip_truncate_page(struct address_space *mapping, loff_t from);
+#else
+static inline int xip_truncate_page(struct address_space *mapping, loff_t from)
+{
+        return 0;
+}
+#endif
+
 static inline void do_generic_file_read(struct file * filp, loff_t *ppos,
                                         read_descriptor_t * desc,
                                         read_actor_t actor)
@@ -1657,6 +1698,52 @@ static inline void simple_transaction_set(struct file *file, size_t n)
         ar->size = n;
 }
 
+/*
+ * simple attribute files
+ *
+ * These attributes behave similar to those in sysfs:
+ *
+ * Writing to an attribute immediately sets a value, an open file can be
+ * written to multiple times.
+ *
+ * Reading from an attribute creates a buffer from the value that might get
+ * read with multiple read calls. When the attribute has been read
+ * completely, no further read calls are possible until the file is opened
+ * again.
+ *
+ * All attributes contain a text representation of a numeric value
+ * that are accessed with the get() and set() functions.
+ */
+#define DEFINE_SIMPLE_ATTRIBUTE(__fops, __get, __set, __fmt)            \
+static int __fops ## _open(struct inode *inode, struct file *file)      \
+{                                                                       \
+        __simple_attr_check_format(__fmt, 0ull);                        \
+        return simple_attr_open(inode, file, __get, __set, __fmt);      \
+}                                                                       \
+static struct file_operations __fops = {                                \
+        .owner   = THIS_MODULE,                                         \
+        .open    = __fops ## _open,                                     \
+        .release = simple_attr_close,                                   \
+        .read    = simple_attr_read,                                    \
+        .write   = simple_attr_write,                                   \
+};
+
+static inline void __attribute__((format(printf, 1, 2)))
+__simple_attr_check_format(const char *fmt, ...)
+{
+        /* don't do anything, just let the compiler check the arguments; */
+}
+
+int simple_attr_open(struct inode *inode, struct file *file,
+                     u64 (*get)(void *), void (*set)(void *, u64),
+                     const char *fmt);
+int simple_attr_close(struct inode *inode, struct file *file);
+ssize_t simple_attr_read(struct file *file, char __user *buf,
+                         size_t len, loff_t *ppos);
+ssize_t simple_attr_write(struct file *file, const char __user *buf,
+                          size_t len, loff_t *ppos);
+
+
 #ifdef CONFIG_SECURITY
 static inline char *alloc_secdata(void)
 {