fs/ufs/file.c

   1 /*
   2  *  linux/fs/ufs/file.c
   3  *
   4  * Copyright (C) 1998
   5  * Daniel Pirkl <daniel.pirkl@email.cz>
   6  * Charles University, Faculty of Mathematics and Physics
   7  *
   8  *  from
   9  *
  10  *  linux/fs/ext2/file.c
  11  *
  12  * Copyright (C) 1992, 1993, 1994, 1995
  13  * Remy Card (card@masi.ibp.fr)
  14  * Laboratoire MASI - Institut Blaise Pascal
  15  * Universite Pierre et Marie Curie (Paris VI)
  16  *
  17  *  from
  18  *
  19  *  linux/fs/minix/file.c
  20  *
  21  *  Copyright (C) 1991, 1992  Linus Torvalds
  22  *
  23  *  ext2 fs regular file handling primitives
  24  */
  25
  26 #include <linux/fs.h>
  27 #include <linux/buffer_head.h>  /* for sync_mapping_buffers() */
  28
  29 #include "ufs_fs.h"
  30 #include "ufs.h"
  31
  32
  33 static int ufs_sync_file(struct file *file, struct dentry *dentry, int datasync)
  34 {
  35         struct inode *inode = dentry->d_inode;
  36         int err;
  37         int ret;
  38
  39         ret = sync_mapping_buffers(inode->i_mapping);
  40         if (!(inode->i_state & I_DIRTY))
  41                 return ret;
  42         if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
  43                 return ret;
  44
  45         err = ufs_sync_inode(inode);
  46         if (ret == 0)
  47                 ret = err;
  48         return ret;
  49 }
  50
  51
  52 /*
  53  * We have mostly NULL's here: the current defaults are ok for
  54  * the ufs filesystem.
  55  */
  56
  57 const struct file_operations ufs_file_operations = {
  58         .llseek         = generic_file_llseek,
  59         .read           = do_sync_read,
  60         .aio_read       = generic_file_aio_read,
  61         .write          = do_sync_write,
  62         .aio_write      = generic_file_aio_write,
  63         .mmap           = generic_file_mmap,
  64         .open           = generic_file_open,
  65         .fsync          = ufs_sync_file,
  66         .splice_read    = generic_file_splice_read,
  67 };