1 files changed, 163 insertions, 66 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index d490779f18d..a6a625be13f 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -60,6 +60,8 @@ extern int dir_notify_enable;
 #define MAY_WRITE 2
 #define MAY_READ 4
 #define MAY_APPEND 8
+#define MAY_ACCESS 16
+#define MAY_OPEN 32
 
 #define FMODE_READ 1
 #define FMODE_WRITE 2
@@ -83,7 +85,10 @@ extern int dir_notify_enable;
 #define READ_SYNC       (READ | (1 << BIO_RW_SYNC))
 #define READ_META       (READ | (1 << BIO_RW_META))
 #define WRITE_SYNC      (WRITE | (1 << BIO_RW_SYNC))
-#define WRITE_BARRIER   ((1 << BIO_RW) | (1 << BIO_RW_BARRIER))
+#define SWRITE_SYNC     (SWRITE | (1 << BIO_RW_SYNC))
+#define WRITE_BARRIER   (WRITE | (1 << BIO_RW_BARRIER))
+#define DISCARD_NOBARRIER (1 << BIO_RW_DISCARD)
+#define DISCARD_BARRIER ((1 << BIO_RW_DISCARD) | (1 << BIO_RW_BARRIER))
 
 #define SEL_IN          1
 #define SEL_OUT         2
@@ -219,6 +224,7 @@ extern int dir_notify_enable;
 #define BLKTRACESTART _IO(0x12,116)
 #define BLKTRACESTOP _IO(0x12,117)
 #define BLKTRACETEARDOWN _IO(0x12,118)
+#define BLKDISCARD _IO(0x12,119)
 
 #define BMAP_IOCTL 1            /* obsolete - kept for compatibility */
 #define FIBMAP     _IO(0x00,1)  /* bmap access */
@@ -228,6 +234,7 @@ extern int dir_notify_enable;
 #define FS_IOC_SETFLAGS                 _IOW('f', 2, long)
 #define FS_IOC_GETVERSION               _IOR('v', 1, long)
 #define FS_IOC_SETVERSION               _IOW('v', 2, long)
+#define FS_IOC_FIEMAP                   _IOWR('f', 11, struct fiemap)
 #define FS_IOC32_GETFLAGS               _IOR('f', 1, int)
 #define FS_IOC32_SETFLAGS               _IOW('f', 2, int)
 #define FS_IOC32_GETVERSION             _IOR('v', 1, int)
@@ -276,7 +283,7 @@ extern int dir_notify_enable;
 #include <linux/types.h>
 #include <linux/kdev_t.h>
 #include <linux/dcache.h>
-#include <linux/namei.h>
+#include <linux/path.h>
 #include <linux/stat.h>
 #include <linux/cache.h>
 #include <linux/kobject.h>
@@ -288,6 +295,7 @@ extern int dir_notify_enable;
 #include <linux/mutex.h>
 #include <linux/capability.h>
 #include <linux/semaphore.h>
+#include <linux/fiemap.h>
 
 #include <asm/atomic.h>
 #include <asm/byteorder.h>
@@ -317,22 +325,23 @@ typedef void (dio_iodone_t)(struct kiocb *iocb, loff_t offset,
  * Attribute flags.  These should be or-ed together to figure out what
  * has been changed!
  */
-#define ATTR_MODE       1
-#define ATTR_UID        2
-#define ATTR_GID        4
-#define ATTR_SIZE       8
-#define ATTR_ATIME      16
-#define ATTR_MTIME      32
-#define ATTR_CTIME      64
-#define ATTR_ATIME_SET  128
-#define ATTR_MTIME_SET  256
-#define ATTR_FORCE      512     /* Not a change, but a change it */
-#define ATTR_ATTR_FLAG  1024
-#define ATTR_KILL_SUID  2048
-#define ATTR_KILL_SGID  4096
-#define ATTR_FILE       8192
-#define ATTR_KILL_PRIV  16384
-#define ATTR_OPEN       32768   /* Truncating from open(O_TRUNC) */
+#define ATTR_MODE       (1 << 0)
+#define ATTR_UID        (1 << 1)
+#define ATTR_GID        (1 << 2)
+#define ATTR_SIZE       (1 << 3)
+#define ATTR_ATIME      (1 << 4)
+#define ATTR_MTIME      (1 << 5)
+#define ATTR_CTIME      (1 << 6)
+#define ATTR_ATIME_SET  (1 << 7)
+#define ATTR_MTIME_SET  (1 << 8)
+#define ATTR_FORCE      (1 << 9) /* Not a change, but a change it */
+#define ATTR_ATTR_FLAG  (1 << 10)
+#define ATTR_KILL_SUID  (1 << 11)
+#define ATTR_KILL_SGID  (1 << 12)
+#define ATTR_FILE       (1 << 13)
+#define ATTR_KILL_PRIV  (1 << 14)
+#define ATTR_OPEN       (1 << 15) /* Truncating from open(O_TRUNC) */
+#define ATTR_TIMES_SET  (1 << 16)
 
 /*
  * This is the Inode Attributes structure, used for notify_change().  It
@@ -439,6 +448,27 @@ static inline size_t iov_iter_count(struct iov_iter *i)
         return i->count;
 }
 
+/*
+ * "descriptor" for what we're up to with a read.
+ * This allows us to use the same read code yet
+ * have multiple different users of the data that
+ * we read from a file.
+ *
+ * The simplest case just copies the data to user
+ * mode.
+ */
+typedef struct {
+        size_t written;
+        size_t count;
+        union {
+                char __user *buf;
+                void *data;
+        } arg;
+        int error;
+} read_descriptor_t;
+
+typedef int (*read_actor_t)(read_descriptor_t *, struct page *,
+                unsigned long, unsigned long);
 
 struct address_space_operations {
         int (*writepage)(struct page *page, struct writeback_control *wbc);
@@ -480,6 +510,8 @@ struct address_space_operations {
         int (*migratepage) (struct address_space *,
                         struct page *, struct page *);
         int (*launder_page) (struct page *);
+        int (*is_partially_uptodate) (struct page *, read_descriptor_t *,
+                                        unsigned long);
 };
 
 /*
@@ -498,7 +530,7 @@ struct backing_dev_info;
 struct address_space {
         struct inode            *host;          /* owner: inode, block_device */
         struct radix_tree_root  page_tree;      /* radix tree of all pages */
-        rwlock_t                tree_lock;      /* and rwlock protecting it */
+        spinlock_t              tree_lock;      /* and lock protecting it */
         unsigned int            i_mmap_writable;/* count VM_SHARED mappings */
         struct prio_tree_root   i_mmap;         /* tree of private and shared mappings */
         struct list_head        i_mmap_nonlinear;/*list VM_NONLINEAR mappings */
@@ -791,7 +823,7 @@ struct file {
 #define f_dentry        f_path.dentry
 #define f_vfsmnt        f_path.mnt
         const struct file_operations    *f_op;
-        atomic_t                f_count;
+        atomic_long_t           f_count;
         unsigned int            f_flags;
         mode_t                  f_mode;
         loff_t                  f_pos;
@@ -820,8 +852,8 @@ extern spinlock_t files_lock;
 #define file_list_lock() spin_lock(&files_lock);
 #define file_list_unlock() spin_unlock(&files_lock);
 
-#define get_file(x)     atomic_inc(&(x)->f_count)
-#define file_count(x)   atomic_read(&(x)->f_count)
+#define get_file(x)     atomic_long_inc(&(x)->f_count)
+#define file_count(x)   atomic_long_read(&(x)->f_count)
 
 #ifdef CONFIG_DEBUG_WRITECOUNT
 static inline void file_take_write(struct file *f)
@@ -885,6 +917,12 @@ static inline int file_check_writeable(struct file *filp)
 #define FL_SLEEP        128     /* A blocking lock */
 
 /*
+ * Special return value from posix_lock_file() and vfs_lock_file() for
+ * asynchronous locking.
+ */
+#define FILE_LOCK_DEFERRED 1
+
+/*
  * The POSIX file lock owner is determined by
  * the "struct files_struct" in the thread group
  * (or NULL for no owner - BSD locks).
@@ -894,8 +932,6 @@ static inline int file_check_writeable(struct file *filp)
 typedef struct files_struct *fl_owner_t;
 
 struct file_lock_operations {
-        void (*fl_insert)(struct file_lock *);  /* lock insertion callback */
-        void (*fl_remove)(struct file_lock *);  /* lock removal callback */
         void (*fl_copy_lock)(struct file_lock *, struct file_lock *);
         void (*fl_release_private)(struct file_lock *);
 };
@@ -911,6 +947,14 @@ struct lock_manager_operations {
         int (*fl_change)(struct file_lock **, int);