vfs: Introduce new helpers for syncing after writing to O_SYNC file or IS_SYNC inode

[karo-tx-linux.git] / include / linux / fs.h

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 0872372184fe159a62475b48a99a1a6a26d8f1cd..e2c7f51676622201931d46a8b041d6800c228cfc 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -715,7 +715,7 @@ struct posix_acl;
 
 struct inode {
        struct hlist_node       i_hash;
-       struct list_head        i_list;
+       struct list_head        i_list;         /* backing dev IO list */
        struct list_head        i_sb_list;
        struct list_head        i_dentry;
        unsigned long           i_ino;
@@ -1336,9 +1336,6 @@ struct super_block {
        struct xattr_handler    **s_xattr;
 
        struct list_head        s_inodes;       /* all inodes */
-       struct list_head        s_dirty;        /* dirty inodes */
-       struct list_head        s_io;           /* parked for writeback */
-       struct list_head        s_more_io;      /* parked for more writeback */
        struct hlist_head       s_anon;         /* anonymous dentries for (nfs) exporting */
        struct list_head        s_files;
        /* s_dentry_lru and s_nr_dentry_unused are protected by dcache_lock */
@@ -1528,6 +1525,7 @@ struct inode_operations {
        void (*put_link) (struct dentry *, struct nameidata *, void *);
        void (*truncate) (struct inode *);
        int (*permission) (struct inode *, int);
+       int (*check_acl)(struct inode *, int);
        int (*setattr) (struct dentry *, struct iattr *);
        int (*getattr) (struct vfsmount *mnt, struct dentry *, struct kstat *);
        int (*setxattr) (struct dentry *, const char *,const void *,size_t,int);
@@ -1788,6 +1786,7 @@ extern int get_sb_pseudo(struct file_system_type *, char *,
        struct vfsmount *mnt);
 extern void simple_set_mnt(struct vfsmount *mnt, struct super_block *sb);
 int __put_super_and_need_restart(struct super_block *sb);
+void put_super(struct super_block *sb);
 
 /* Alas, no aliases. Too much hassle with bringing module.h everywhere */
 #define fops_get(fops) \
@@ -1946,6 +1945,7 @@ extern void putname(const char *name);
 extern int register_blkdev(unsigned int, const char *);
 extern void unregister_blkdev(unsigned int, const char *);
 extern struct block_device *bdget(dev_t);
+extern struct block_device *bdgrab(struct block_device *bdev);
 extern void bd_set_size(struct block_device *, loff_t size);
 extern void bd_forget(struct inode *inode);
 extern void bdput(struct block_device *);
@@ -1997,12 +1997,25 @@ extern void bd_release_from_disk(struct block_device *, struct gendisk *);
 #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 *,
-                          const struct file_operations *);
-extern void unregister_chrdev(unsigned int, const char *);
+extern int __register_chrdev(unsigned int major, unsigned int baseminor,
+                            unsigned int count, const char *name,
+                            const struct file_operations *fops);
+extern void __unregister_chrdev(unsigned int major, unsigned int baseminor,
+                               unsigned int count, const char *name);
 extern void unregister_chrdev_region(dev_t, unsigned);
 extern void chrdev_show(struct seq_file *,off_t);
 
+static inline int register_chrdev(unsigned int major, const char *name,
+                                 const struct file_operations *fops)
+{
+       return __register_chrdev(major, 0, 256, name, fops);
+}
+
+static inline void unregister_chrdev(unsigned int major, const char *name)
+{
+       __unregister_chrdev(major, 0, 256, name);
+}
+
 /* fs/block_dev.c */
 #define BDEVNAME_SIZE  32      /* Largest string for a blockdev identifier */
 #define BDEVT_SIZE     10      /* Largest string for MAJ:MIN for blkdev */
@@ -2069,12 +2082,12 @@ static inline void invalidate_remote_inode(struct inode *inode)
 extern int invalidate_inode_pages2(struct address_space *mapping);
 extern int invalidate_inode_pages2_range(struct address_space *mapping,
                                         pgoff_t start, pgoff_t end);
-extern void generic_sync_sb_inodes(struct super_block *sb,
-                               struct writeback_control *wbc);
 extern int write_inode_now(struct inode *, int);
 extern int filemap_fdatawrite(struct address_space *);
 extern int filemap_flush(struct address_space *);
 extern int filemap_fdatawait(struct address_space *);
+extern int filemap_fdatawait_range(struct address_space *, loff_t lstart,
+                                  loff_t lend);
 extern int filemap_write_and_wait(struct address_space *mapping);
 extern int filemap_write_and_wait_range(struct address_space *mapping,
                                        loff_t lstart, loff_t lend);
@@ -2085,7 +2098,10 @@ extern int __filemap_fdatawrite_range(struct address_space *mapping,
 extern int filemap_fdatawrite_range(struct address_space *mapping,
                                loff_t start, loff_t end);
 
+extern int vfs_fsync_range(struct file *file, struct dentry *dentry,
+                          loff_t start, loff_t end, int datasync);
 extern int vfs_fsync(struct file *file, struct dentry *dentry, int datasync);
+extern int generic_write_sync(struct file *file, loff_t pos, loff_t count);
 extern void sync_supers(void);
 extern void emergency_sync(void);
 extern void emergency_remount(void);
@@ -2122,7 +2138,7 @@ extern struct file *do_filp_open(int dfd, const char *pathname,
                int open_flag, int mode, int acc_mode);
 extern int may_open(struct path *, int, int);
 
-extern int kernel_read(struct file *, unsigned long, char *, unsigned long);
+extern int kernel_read(struct file *, loff_t, char *, unsigned long);
 extern struct file * open_exec(const char *);
  
 /* fs/dcache.c -- generic fs support functions */
@@ -2136,7 +2152,7 @@ extern loff_t default_llseek(struct file *file, loff_t offset, int origin);
 
 extern loff_t vfs_llseek(struct file *file, loff_t offset, int origin);
 
-extern struct inode * inode_init_always(struct super_block *, struct inode *);
+extern int inode_init_always(struct super_block *, struct inode *);
 extern void inode_init_once(struct inode *);
 extern void inode_add_to_lists(struct super_block *, struct inode *);
 extern void iput(struct inode *);
@@ -2163,6 +2179,7 @@ extern void __iget(struct inode * inode);
 extern void iget_failed(struct inode *);
 extern void clear_inode(struct inode *);
 extern void destroy_inode(struct inode *);
+extern void __destroy_inode(struct inode *);
 extern struct inode *new_inode(struct super_block *);
 extern int should_remove_suid(struct dentry *);
 extern int file_remove_suid(struct file *);
@@ -2184,16 +2201,15 @@ extern int bdev_read_only(struct block_device *);
 extern int set_blocksize(struct block_device *, int);
 extern int sb_set_blocksize(struct super_block *, int);
 extern int sb_min_blocksize(struct super_block *, int);
-extern int sb_has_dirty_inodes(struct super_block *);
 
 extern int generic_file_mmap(struct file *, struct vm_area_struct *);
 extern int generic_file_readonly_mmap(struct file *, struct vm_area_struct *);
 extern int file_read_actor(read_descriptor_t * desc, struct page *page, unsigned long offset, unsigned long size);
 int generic_write_checks(struct file *file, loff_t *pos, size_t *count, int isblk);
 extern ssize_t generic_file_aio_read(struct kiocb *, const struct iovec *, unsigned long, loff_t);
+extern ssize_t __generic_file_aio_write(struct kiocb *, const struct iovec *, unsigned long,
+               loff_t *);
 extern ssize_t generic_file_aio_write(struct kiocb *, const struct iovec *, unsigned long, loff_t);
-extern ssize_t generic_file_aio_write_nolock(struct kiocb *, const struct iovec *,
-               unsigned long, loff_t);
 extern ssize_t generic_file_direct_write(struct kiocb *, const struct iovec *,
                unsigned long *, loff_t, loff_t *, size_t, size_t);
 extern ssize_t generic_file_buffered_write(struct kiocb *, const struct iovec *,
@@ -2203,6 +2219,10 @@ extern ssize_t do_sync_write(struct file *filp, const char __user *buf, size_t l
 extern int generic_segment_checks(const struct iovec *iov,
                unsigned long *nr_segs, size_t *count, int access_flags);
 
+/* fs/block_dev.c */
+extern ssize_t blkdev_aio_write(struct kiocb *iocb, const struct iovec *iov,
+                               unsigned long nr_segs, loff_t pos);
+
 /* fs/splice.c */
 extern ssize_t generic_file_splice_read(struct file *, loff_t *,
                struct pipe_inode_info *, size_t, unsigned int);