fs/sysv/file.c

   1 /*
   2  *  linux/fs/sysv/file.c
   3  *
   4  *  minix/file.c
   5  *  Copyright (C) 1991, 1992  Linus Torvalds
   6  *
   7  *  coh/file.c
   8  *  Copyright (C) 1993  Pascal Haible, Bruno Haible
   9  *
  10  *  sysv/file.c
  11  *  Copyright (C) 1993  Bruno Haible
  12  *
  13  *  SystemV/Coherent regular file handling primitives
  14  */
  15
  16 #include "sysv.h"
  17
  18 /*
  19  * We have mostly NULLs here: the current defaults are OK for
  20  * the coh filesystem.
  21  */
  22 const struct file_operations sysv_file_operations = {
  23         .llseek         = generic_file_llseek,
  24         .read           = generic_file_read,
  25         .write          = generic_file_write,
  26         .mmap           = generic_file_mmap,
  27         .fsync          = sysv_sync_file,
  28         .sendfile       = generic_file_sendfile,
  29 };
  30
  31 struct inode_operations sysv_file_inode_operations = {
  32         .truncate       = sysv_truncate,
  33         .getattr        = sysv_getattr,
  34 };
  35
  36 int sysv_sync_file(struct file * file, struct dentry *dentry, int datasync)
  37 {
  38         struct inode *inode = dentry->d_inode;
  39         int err;
  40
  41         err = sync_mapping_buffers(inode->i_mapping);
  42         if (!(inode->i_state & I_DIRTY))
  43                 return err;
  44         if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
  45                 return err;
  46
  47         err |= sysv_sync_inode(inode);
  48         return err ? -EIO : 0;
  49 }