fs/minix/file.c

   1 /*
   2  *  linux/fs/minix/file.c
   3  *
   4  *  Copyright (C) 1991, 1992 Linus Torvalds
   5  *
   6  *  minix regular file handling primitives
   7  */
   8
   9 #include <linux/buffer_head.h>          /* for fsync_inode_buffers() */
  10 #include "minix.h"
  11
  12 /*
  13  * We have mostly NULLs here: the current defaults are OK for
  14  * the minix filesystem.
  15  */
  16 int minix_sync_file(struct file *, struct dentry *, int);
  17
  18 const struct file_operations minix_file_operations = {
  19         .llseek         = generic_file_llseek,
  20         .read           = do_sync_read,
  21         .aio_read       = generic_file_aio_read,
  22         .write          = do_sync_write,
  23         .aio_write      = generic_file_aio_write,
  24         .mmap           = generic_file_mmap,
  25         .fsync          = minix_sync_file,
  26         .splice_read    = generic_file_splice_read,
  27 };
  28
  29 const struct inode_operations minix_file_inode_operations = {
  30         .truncate       = minix_truncate,
  31         .getattr        = minix_getattr,
  32 };
  33
  34 int minix_sync_file(struct file * file, struct dentry *dentry, int datasync)
  35 {
  36         struct inode *inode = dentry->d_inode;
  37         int err;
  38
  39         err = sync_mapping_buffers(inode->i_mapping);
  40         if (!(inode->i_state & I_DIRTY))
  41                 return err;
  42         if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
  43                 return err;
  44
  45         err |= minix_sync_inode(inode);
  46         return err ? -EIO : 0;
  47 }