1 files changed, 36 insertions, 61 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 34406ed467c3..adce6e1d70c2 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -269,6 +269,7 @@ extern int dir_notify_enable;
 #include <linux/types.h>
 #include <linux/kdev_t.h>
 #include <linux/dcache.h>
+#include <linux/namei.h>
 #include <linux/stat.h>
 #include <linux/cache.h>
 #include <linux/kobject.h>
@@ -276,7 +277,7 @@ extern int dir_notify_enable;
 #include <linux/radix-tree.h>
 #include <linux/prio_tree.h>
 #include <linux/init.h>
-#include <linux/sched.h>
+#include <linux/pid.h>
 #include <linux/mutex.h>
 
 #include <asm/atomic.h>
@@ -482,21 +483,6 @@ struct block_device {
 };
 
 /*
- * bdev->bd_mutex nesting subclasses for the lock validator:
- *
- * 0: normal
- * 1: 'whole'
- * 2: 'partition'
- */
-enum bdev_bd_mutex_lock_class
-{
-        BD_MUTEX_NORMAL,
-        BD_MUTEX_WHOLE,
-        BD_MUTEX_PARTITION
-};
-
-
-/*
  * Radix-tree tags, for tagging dirty and writeback pages within the pagecache
  * radix trees
  */
@@ -543,19 +529,22 @@ struct inode {
         struct list_head        i_dentry;
         unsigned long           i_ino;
         atomic_t                i_count;
-        umode_t                 i_mode;
         unsigned int            i_nlink;
         uid_t                   i_uid;
         gid_t                   i_gid;
         dev_t                   i_rdev;
+        unsigned long           i_version;
         loff_t                  i_size;
+#ifdef __NEED_I_SIZE_ORDERED
+        seqcount_t              i_size_seqcount;
+#endif
         struct timespec         i_atime;
         struct timespec         i_mtime;
         struct timespec         i_ctime;
         unsigned int            i_blkbits;
-        unsigned long           i_version;
         blkcnt_t                i_blocks;
         unsigned short          i_bytes;
+        umode_t                 i_mode;
         spinlock_t              i_lock; /* i_blocks, i_bytes, maybe i_size */
         struct mutex            i_mutex;
         struct rw_semaphore     i_alloc_sem;
@@ -598,9 +587,6 @@ struct inode {
         void                    *i_security;
 #endif
         void                    *i_private; /* fs or device private pointer */
-#ifdef __NEED_I_SIZE_ORDERED
-        seqcount_t              i_size_seqcount;
-#endif
 };
 
 /*
@@ -623,6 +609,9 @@ enum inode_i_mutex_lock_class
         I_MUTEX_QUOTA
 };
 
+extern void inode_double_lock(struct inode *inode1, struct inode *inode2);
+extern void inode_double_unlock(struct inode *inode1, struct inode *inode2);
+
 /*
  * NOTE: in a 32bit arch with a preemptable kernel and
  * an UP compile the i_size_read/write must be atomic
@@ -633,7 +622,7 @@ enum inode_i_mutex_lock_class
  * cmpxchg8b without the need of the lock prefix). For SMP compiles
  * and 64bit archs it makes no difference if preempt is enabled or not.
  */
-static inline loff_t i_size_read(struct inode *inode)
+static inline loff_t i_size_read(const struct inode *inode)
 {
 #if BITS_PER_LONG==32 && defined(CONFIG_SMP)
         loff_t i_size;
@@ -656,7 +645,11 @@ static inline loff_t i_size_read(struct inode *inode)
 #endif
 }
 
-
+/*
+ * NOTE: unlike i_size_read(), i_size_write() does need locking around it
+ * (normally i_mutex), otherwise on 32bit/SMP an update of i_size_seqcount
+ * can be lost, resulting in subsequent i_size_read() calls spinning forever.
+ */
 static inline void i_size_write(struct inode *inode, loff_t i_size)
 {
 #if BITS_PER_LONG==32 && defined(CONFIG_SMP)
@@ -672,12 +665,12 @@ static inline void i_size_write(struct inode *inode, loff_t i_size)
 #endif
 }
 
-static inline unsigned iminor(struct inode *inode)
+static inline unsigned iminor(const struct inode *inode)
 {
         return MINOR(inode->i_rdev);
 }
 
-static inline unsigned imajor(struct inode *inode)
+static inline unsigned imajor(const struct inode *inode)
 {
         return MAJOR(inode->i_rdev);
 }
@@ -719,8 +712,9 @@ struct file {
                 struct list_head        fu_list;
                 struct rcu_head         fu_rcuhead;
         } f_u;
-        struct dentry           *f_dentry;
-        struct vfsmount         *f_vfsmnt;
+        struct path             f_path;
+#define f_dentry        f_path.dentry
+#define f_vfsmnt        f_path.mnt
         const struct file_operations    *f_op;
         atomic_t                f_count;
         unsigned int            f_flags;
@@ -970,36 +964,13 @@ 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);
-}
+#define get_fs_excl() atomic_inc(&current->fs_excl)
+#define put_fs_excl() atomic_dec(&current->fs_excl)
+#define has_fs_excl() atomic_read(&current->fs_excl)
 
-
-/*
- * Superblock locking.
- */
-static inline void lock_super(struct super_block * sb)
-{
-        get_fs_excl();
-        mutex_lock(&sb->s_lock);
-}
-
-static inline void unlock_super(struct super_block * sb)
-{
-        put_fs_excl();
-        mutex_unlock(&sb->s_lock);
-}
+/* not quite ready to be deprecated, but... */
+extern void lock_super(struct super_block *);
+extern void unlock_super(struct super_block *);
 
 /*
  * VFS helper functions..
@@ -1255,7 +1226,7 @@ extern void touch_atime(struct vfsmount *mnt, struct dentry *dentry);
 static inline void file_accessed(struct file *file)
 {
         if (!(file->f_flags & O_NOATIME))
-                touch_atime(file->f_vfsmnt, file->f_dentry);
+                touch_atime(file->f_path.mnt, file->f_path.dentry);
 }
 
 int sync_inode(struct inode *inode, struct writeback_control *wbc);
@@ -1497,7 +1468,9 @@ extern char * getname(const char __user *);
 extern void __init vfs_caches_init_early(void);
 extern void __init vfs_caches_init(unsigned long);
 
-#define __getname()     kmem_cache_alloc(names_cachep, SLAB_KERNEL)
+extern struct kmem_cache *names_cachep;
+
+#define __getname()     kmem_cache_alloc(names_cachep, GFP_KERNEL)
 #define __putname(name) kmem_cache_free(names_cachep, (void *)(name))
 #ifndef CONFIG_AUDITSYSCALL
 #define putname(name)   __putname(name)
@@ -1513,7 +1486,6 @@ extern void bd_set_size(struct block_device *, loff_t size);
 extern void bd_forget(struct inode *inode);
 extern void bdput(struct block_device *);
 extern struct block_device *open_by_devnum(dev_t, unsigned);
-extern struct block_device *open_partition_by_devnum(dev_t, unsigned);
 extern const struct address_space_operations def_blk_aops;
 #else
 static inline void bd_forget(struct inode *inode) {}
@@ -1531,7 +1503,6 @@ extern int blkdev_driver_ioctl(struct inode *inode, struct file *file,
 extern long compat_blkdev_ioctl(struct file *, unsigned, unsigned long);
 extern int blkdev_get(struct block_device *, mode_t, unsigned);
 extern int blkdev_put(struct block_device *);
-extern int blkdev_put_partition(struct block_device *);
 extern int bd_claim(struct block_device *, void *);
 extern void bd_release(struct block_device *);
 #ifdef CONFIG_SYSFS
@@ -1646,7 +1617,7 @@ static inline void put_write_access(struct inode * inode)
 static inline void allow_write_access(struct file *file)
 {
         if (file)
-                atomic_inc(&file->f_dentry->d_inode->i_writecount);
+                atomic_inc(&file->f_path.dentry->d_inode->i_writecount);
 }
 extern int do_pipe(int *);
 extern struct file *create_read_pipe(struct file *f);
@@ -1705,6 +1676,8 @@ extern void __iget(struct inode * inode);
 extern void clear_inode(struct inode *);
 extern void destroy_inode(struct inode *);
 extern struct inode *new_inode(struct super_block *);
+extern int __remove_suid(struct dentry *, int);
+extern int should_remove_suid(struct dentry *);
 extern int remove_suid(struct dentry *);
 extern void remove_dquot_ref(struct super_block *, int, struct list_head *);
 
@@ -1751,6 +1724,8 @@ extern ssize_t generic_file_splice_read(struct file *, loff_t *,
                 struct pipe_inode_info *, size_t, unsigned int);
 extern ssize_t generic_file_splice_write(struct pipe_inode_info *,
                 struct file *, loff_t *, size_t, unsigned int);
+extern ssize_t generic_file_splice_write_nolock(struct pipe_inode_info *,
+                struct file *, loff_t *, size_t, unsigned int);
 extern ssize_t generic_splice_sendpage(struct pipe_inode_info *pipe,
                 struct file *out, loff_t *, size_t len, unsigned int flags);
 extern long do_splice_direct(struct file *in, loff_t *ppos, struct file *out,