Merge branch 'master' of /home/davem/src/GIT/linux-2.6/

1 files changed, 29 insertions, 41 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index a057f48eb15..b1bcb275b59 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -152,6 +152,7 @@ struct inodes_stat_t {
 #define WRITE_SYNC_PLUG	(WRITE | (1 << BIO_RW_SYNCIO) | (1 << BIO_RW_NOIDLE))
 #define WRITE_SYNC	(WRITE_SYNC_PLUG | (1 << BIO_RW_UNPLUG))
 #define WRITE_ODIRECT_PLUG	(WRITE | (1 << BIO_RW_SYNCIO))
+#define WRITE_META	(WRITE | (1 << BIO_RW_META))
 #define SWRITE_SYNC_PLUG	\
 			(SWRITE | (1 << BIO_RW_SYNCIO) | (1 << BIO_RW_NOIDLE))
 #define SWRITE_SYNC	(SWRITE_SYNC_PLUG | (1 << BIO_RW_UNPLUG))
@@ -1094,10 +1095,6 @@ struct file_lock {
 
 extern void send_sigio(struct fown_struct *fown, int fd, int band);
 
-/* fs/sync.c */
-extern int do_sync_mapping_range(struct address_space *mapping, loff_t offset,
-			loff_t endbyte, unsigned int flags);
-
 #ifdef CONFIG_FILE_LOCKING
 extern int fcntl_getlk(struct file *, struct flock __user *);
 extern int fcntl_setlk(unsigned int, struct file *, unsigned int,
@@ -1590,7 +1587,7 @@ struct super_operations {
  * until that flag is cleared.  I_WILL_FREE, I_FREEING and I_CLEAR are set at
  * various stages of removing an inode.
  *
- * Two bits are used for locking and completion notification, I_LOCK and I_SYNC.
+ * Two bits are used for locking and completion notification, I_NEW and I_SYNC.
  *
  * I_DIRTY_SYNC		Inode is dirty, but doesn't have to be written on
  *			fdatasync().  i_atime is the usual cause.
@@ -1599,8 +1596,14 @@ struct super_operations {
  *			don't have to write inode on fdatasync() when only
  *			mtime has changed in it.
  * I_DIRTY_PAGES	Inode has dirty pages.  Inode itself may be clean.
- * I_NEW		get_new_inode() sets i_state to I_LOCK|I_NEW.  Both
- *			are cleared by unlock_new_inode(), called from iget().
+ * I_NEW		Serves as both a mutex and completion notification.
+ *			New inodes set I_NEW.  If two processes both create
+ *			the same inode, one of them will release its inode and
+ *			wait for I_NEW to be released before returning.
+ *			Inodes in I_WILL_FREE, I_FREEING or I_CLEAR state can
+ *			also cause waiting on I_NEW, without I_NEW actually
+ *			being set.  find_inode() uses this to prevent returning
+ *			nearly-dead inodes.
  * I_WILL_FREE		Must be set when calling write_inode_now() if i_count
  *			is zero.  I_FREEING must be set when I_WILL_FREE is
  *			cleared.
@@ -1614,35 +1617,23 @@ struct super_operations {
  *			prohibited for many purposes.  iget() must wait for
  *			the inode to be completely released, then create it
  *			anew.  Other functions will just ignore such inodes,
- *			if appropriate.  I_LOCK is used for waiting.
+ *			if appropriate.  I_NEW is used for waiting.
  *
- * I_LOCK		Serves as both a mutex and completion notification.
- *			New inodes set I_LOCK.  If two processes both create
- *			the same inode, one of them will release its inode and
- *			wait for I_LOCK to be released before returning.
- *			Inodes in I_WILL_FREE, I_FREEING or I_CLEAR state can
- *			also cause waiting on I_LOCK, without I_LOCK actually
- *			being set.  find_inode() uses this to prevent returning
- *			nearly-dead inodes.
- * I_SYNC		Similar to I_LOCK, but limited in scope to writeback
- *			of inode dirty data.  Having a separate lock for this
- *			purpose reduces latency and prevents some filesystem-
- *			specific deadlocks.
+ * I_SYNC		Synchonized write of dirty inode data.  The bits is
+ *			set during data writeback, and cleared with a wakeup
+ *			on the bit address once it is done.
  *
  * Q: What is the difference between I_WILL_FREE and I_FREEING?
- * Q: igrab() only checks on (I_FREEING|I_WILL_FREE).  Should it also check on
- *    I_CLEAR?  If not, why?
  */
 #define I_DIRTY_SYNC		1
 #define I_DIRTY_DATASYNC	2
 #define I_DIRTY_PAGES		4
-#define I_NEW			8
+#define __I_NEW			3
+#define I_NEW			(1 << __I_NEW)
 #define I_WILL_FREE		16
 #define I_FREEING		32
 #define I_CLEAR			64
-#define __I_LOCK		7
-#define I_LOCK			(1 << __I_LOCK)
-#define __I_SYNC		8
+#define __I_SYNC		7
 #define I_SYNC			(1 << __I_SYNC)
 
 #define I_DIRTY (I_DIRTY_SYNC | I_DIRTY_DATASYNC | I_DIRTY_PAGES)
@@ -2189,7 +2180,6 @@ static inline void insert_inode_hash(struct inode *inode) {
 	__insert_inode_hash(inode, inode->i_ino);
 }
 
-extern struct file * get_empty_filp(void);
 extern void file_move(struct file *f, struct list_head *list);
 extern void file_kill(struct file *f);
 #ifdef CONFIG_BLOCK
@@ -2264,9 +2254,11 @@ ssize_t __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
 	int lock_type);
 
 enum {
-	DIO_LOCKING = 1, /* need locking between buffered and direct access */
-	DIO_NO_LOCKING,  /* bdev; no locking at all between buffered/direct */
-	DIO_OWN_LOCKING, /* filesystem locks buffered and direct internally */
+	/* need locking between buffered and direct access */
+	DIO_LOCKING	= 0x01,
+
+	/* filesystem does not support filling holes */
+	DIO_SKIP_HOLES	= 0x02,
 };
 
 static inline ssize_t blockdev_direct_IO(int rw, struct kiocb *iocb,
@@ -2275,7 +2267,8 @@ static inline ssize_t blockdev_direct_IO(int rw, struct kiocb *iocb,
 	dio_iodone_t end_io)
 {
 	return __blockdev_direct_IO(rw, iocb, inode, bdev, iov, offset,
-				nr_segs, get_block, end_io, DIO_LOCKING);
+				    nr_segs, get_block, end_io,
+				    DIO_LOCKING | DIO_SKIP_HOLES);
 }
 
 static inline ssize_t blockdev_direct_IO_no_locking(int rw, struct kiocb *iocb,
@@ -2284,16 +2277,7 @@ static inline ssize_t blockdev_direct_IO_no_locking(int rw, struct kiocb *iocb,
 	dio_iodone_t end_io)
 {
 	return __blockdev_direct_IO(rw, iocb, inode, bdev, iov, offset,
-				nr_segs, get_block, end_io, DIO_NO_LOCKING);
-}
-
-static inline ssize_t blockdev_direct_IO_own_locking(int rw, struct kiocb *iocb,
-	struct inode *inode, struct block_device *bdev, const struct iovec *iov,
-	loff_t offset, unsigned long nr_segs, get_block_t get_block,
-	dio_iodone_t end_io)
-{
-	return __blockdev_direct_IO(rw, iocb, inode, bdev, iov, offset,
-				nr_segs, get_block, end_io, DIO_OWN_LOCKING);
+				nr_segs, get_block, end_io, 0);
 }
 #endif
 
@@ -2313,6 +2297,7 @@ extern const struct inode_operations page_symlink_inode_operations;
 extern int generic_readlink(struct dentry *, char __user *, int);
 extern void generic_fillattr(struct inode *, struct kstat *);
 extern int vfs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
+void __inode_add_bytes(struct inode *inode, loff_t bytes);
 void inode_add_bytes(struct inode *inode, loff_t bytes);
 void inode_sub_bytes(struct inode *inode, loff_t bytes);
 loff_t inode_get_bytes(struct inode *inode);
@@ -2478,5 +2463,8 @@ int proc_nr_files(struct ctl_table *table, int write,
 
 int __init get_filesystem_list(char *buf);
 
+#define ACC_MODE(x) ("\004\002\006\006"[(x)&O_ACCMODE])
+#define OPEN_FMODE(flag) ((__force fmode_t)((flag + 1) & O_ACCMODE))
+
 #endif /* __KERNEL__ */
 #endif /* _LINUX_FS_H */