Merge branch 'for_paulus' of master.kernel.org:/pub/scm/linux/kernel/git/galak/powerpc

[pandora-kernel.git] / include / linux / fs.h

diff --git a/include/linux/fs.h b/include/linux/fs.h
index ab67181..3de2bfb 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -252,9 +252,6 @@ extern void __init files_init(unsigned long);
 struct buffer_head;
 typedef int (get_block_t)(struct inode *inode, sector_t iblock,
                        struct buffer_head *bh_result, int create);
-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 kiocb *iocb, loff_t offset,
                        ssize_t bytes, void *private);
 
@@ -413,6 +410,9 @@ struct block_device {
        struct list_head        bd_inodes;
        void *                  bd_holder;
        int                     bd_holders;
+#ifdef CONFIG_SYSFS
+       struct list_head        bd_holder_list;
+#endif
        struct block_device *   bd_contains;
        unsigned                bd_block_size;
        struct hd_struct *      bd_part;
@@ -490,13 +490,13 @@ struct inode {
        unsigned int            i_blkbits;
        unsigned long           i_blksize;
        unsigned long           i_version;
-       unsigned long           i_blocks;
+       blkcnt_t                i_blocks;
        unsigned short          i_bytes;
        spinlock_t              i_lock; /* i_blocks, i_bytes, maybe i_size */
        struct mutex            i_mutex;
        struct rw_semaphore     i_alloc_sem;
        struct inode_operations *i_op;
-       struct file_operations  *i_fop; /* former ->i_op->default_file_ops */
+       const struct file_operations    *i_fop; /* former ->i_op->default_file_ops */
        struct super_block      *i_sb;
        struct file_lock        *i_flock;
        struct address_space    *i_mapping;
@@ -636,7 +636,7 @@ struct file {
        } f_u;
        struct dentry           *f_dentry;
        struct vfsmount         *f_vfsmnt;
-       struct file_operations  *f_op;
+       const struct file_operations    *f_op;
        atomic_t                f_count;
        unsigned int            f_flags;
        mode_t                  f_mode;
@@ -757,6 +757,13 @@ extern void send_sigio(struct fown_struct *fown, int fd, int band);
 extern int fcntl_setlease(unsigned int fd, struct file *filp, long arg);
 extern int fcntl_getlease(struct file *filp);
 
+/* fs/sync.c */
+#define SYNC_FILE_RANGE_WAIT_BEFORE    1
+#define SYNC_FILE_RANGE_WRITE          2
+#define SYNC_FILE_RANGE_WAIT_AFTER     4
+extern int do_sync_file_range(struct file *file, loff_t offset, loff_t endbyte,
+                       unsigned int flags);
+
 /* fs/locks.c */
 extern void locks_init_lock(struct file_lock *);
 extern void locks_copy_lock(struct file_lock *, struct file_lock *);
@@ -857,7 +864,7 @@ struct super_block {
         */
        struct mutex s_vfs_rename_mutex;        /* Kludge */
 
-       /* Granuality of c/m/atime in ns.
+       /* Granularity of c/m/atime in ns.
           Cannot be worse than a second */
        u32                s_time_gran;
 };
@@ -1032,6 +1039,8 @@ struct file_operations {
        int (*check_flags)(int);
        int (*dir_notify)(struct file *filp, unsigned long arg);
        int (*flock) (struct file *, int, struct file_lock *);
+       ssize_t (*splice_write)(struct pipe_inode_info *, struct file *, loff_t *, size_t, unsigned int);
+       ssize_t (*splice_read)(struct file *, loff_t *, struct pipe_inode_info *, size_t, unsigned int);
 };
 
 struct inode_operations {
@@ -1390,11 +1399,11 @@ 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 file_operations def_blk_fops;
+extern const struct file_operations def_blk_fops;
 extern struct address_space_operations def_blk_aops;
-extern struct file_operations def_chr_fops;
-extern struct file_operations bad_sock_fops;
-extern struct file_operations def_fifo_fops;
+extern const struct file_operations def_chr_fops;
+extern const struct file_operations bad_sock_fops;
+extern const struct file_operations def_fifo_fops;
 extern int ioctl_by_bdev(struct block_device *, unsigned, unsigned long);
 extern int blkdev_ioctl(struct inode *, struct file *, unsigned, unsigned long);
 extern long compat_blkdev_ioctl(struct file *, unsigned, unsigned long);
@@ -1402,34 +1411,34 @@ extern int blkdev_get(struct block_device *, mode_t, unsigned);
 extern int blkdev_put(struct block_device *);
 extern int bd_claim(struct block_device *, void *);
 extern void bd_release(struct block_device *);
+#ifdef CONFIG_SYSFS
+extern int bd_claim_by_disk(struct block_device *, void *, struct gendisk *);
+extern void bd_release_from_disk(struct block_device *, struct gendisk *);
+#else
+#define bd_claim_by_disk(bdev, holder, disk)   bd_claim(bdev, holder)
+#define bd_release_from_disk(bdev, disk)       bd_release(bdev)
+#endif
 
 /* fs/char_dev.c */
+#define CHRDEV_MAJOR_HASH_SIZE 255
 extern int alloc_chrdev_region(dev_t *, unsigned, unsigned, const char *);
 extern int register_chrdev_region(dev_t, unsigned, const char *);
 extern int register_chrdev(unsigned int, const char *,
-                          struct file_operations *);
+                          const struct file_operations *);
 extern int unregister_chrdev(unsigned int, const char *);
 extern void unregister_chrdev_region(dev_t, unsigned);
 extern int chrdev_open(struct inode *, struct file *);
-extern int get_chrdev_list(char *);
-extern void *acquire_chrdev_list(void);
-extern int count_chrdev_list(void);
-extern void *get_next_chrdev(void *);
-extern int get_chrdev_info(void *, int *, char **);
-extern void release_chrdev_list(void *);
+extern void chrdev_show(struct seq_file *,off_t);
 
 /* fs/block_dev.c */
+#define BLKDEV_MAJOR_HASH_SIZE 255
 #define BDEVNAME_SIZE  32      /* Largest string for a blockdev identifier */
 extern const char *__bdevname(dev_t, char *buffer);
 extern const char *bdevname(struct block_device *bdev, char *buffer);
 extern struct block_device *lookup_bdev(const char *);
 extern struct block_device *open_bdev_excl(const char *, int, void *);
 extern void close_bdev_excl(struct block_device *);
-extern void *acquire_blkdev_list(void);
-extern int count_blkdev_list(void);
-extern void *get_next_blkdev(void *);
-extern int get_blkdev_info(void *, int *, char **);
-extern void release_blkdev_list(void *);
+extern void blkdev_show(struct seq_file *,off_t);
 
 extern void init_special_inode(struct inode *, umode_t, dev_t);
 
@@ -1437,9 +1446,9 @@ extern void init_special_inode(struct inode *, umode_t, dev_t);
 extern void make_bad_inode(struct inode *);
 extern int is_bad_inode(struct inode *);
 
-extern struct file_operations read_fifo_fops;
-extern struct file_operations write_fifo_fops;
-extern struct file_operations rdwr_fifo_fops;
+extern const struct file_operations read_fifo_fops;
+extern const struct file_operations write_fifo_fops;
+extern const struct file_operations rdwr_fifo_fops;
 
 extern int fs_may_remount_ro(struct super_block *);
 
@@ -1602,6 +1611,17 @@ extern ssize_t generic_file_sendfile(struct file *, loff_t *, size_t, read_actor
 extern void do_generic_mapping_read(struct address_space *mapping,
                                    struct file_ra_state *, struct file *,
                                    loff_t *, read_descriptor_t *, read_actor_t);
+
+/* fs/splice.c */
+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_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,
+               size_t len, unsigned int flags);
+
 extern void
 file_ra_state_init(struct file_ra_state *ra, struct address_space *mapping);
 extern ssize_t generic_file_readv(struct file *filp, const struct iovec *iov, 
@@ -1645,7 +1665,7 @@ static inline void do_generic_file_read(struct file * filp, loff_t *ppos,
 
 ssize_t __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
        struct block_device *bdev, const struct iovec *iov, loff_t offset,
-       unsigned long nr_segs, get_blocks_t get_blocks, dio_iodone_t end_io,
+       unsigned long nr_segs, get_block_t get_block, dio_iodone_t end_io,
        int lock_type);
 
 enum {
@@ -1656,32 +1676,32 @@ enum {
 
 static inline ssize_t blockdev_direct_IO(int rw, struct kiocb *iocb,
        struct inode *inode, struct block_device *bdev, const struct iovec *iov,
-       loff_t offset, unsigned long nr_segs, get_blocks_t get_blocks,
+       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_blocks, end_io, DIO_LOCKING);
+                               nr_segs, get_block, end_io, DIO_LOCKING);
 }
 
 static inline ssize_t blockdev_direct_IO_no_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_blocks_t get_blocks,
+       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_blocks, end_io, DIO_NO_LOCKING);
+                               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_blocks_t get_blocks,
+       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_blocks, end_io, DIO_OWN_LOCKING);
+                               nr_segs, get_block, end_io, DIO_OWN_LOCKING);
 }
 
-extern struct file_operations generic_ro_fops;
+extern const struct file_operations generic_ro_fops;
 
 #define special_file(m) (S_ISCHR(m)||S_ISBLK(m)||S_ISFIFO(m)||S_ISSOCK(m))
 
@@ -1737,9 +1757,9 @@ extern int simple_commit_write(struct file *file, struct page *page,
 
 extern struct dentry *simple_lookup(struct inode *, struct dentry *, struct nameidata *);
 extern ssize_t generic_read_dir(struct file *, char __user *, size_t, loff_t *);
-extern struct file_operations simple_dir_operations;
+extern const struct file_operations simple_dir_operations;
 extern struct inode_operations simple_dir_inode_operations;
-struct tree_descr { char *name; struct file_operations *ops; int mode; };
+struct tree_descr { char *name; const struct file_operations *ops; int mode; };
 struct dentry *d_alloc_name(struct dentry *, const char *);
 extern int simple_fill_super(struct super_block *, int, struct tree_descr *);
 extern int simple_pin_fs(char *name, struct vfsmount **mount, int *count);