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 "minix.h"
  10
  11 /*
  12  * We have mostly NULLs here: the current defaults are OK for
  13  * the minix filesystem.
  14  */
  15 const struct file_operations minix_file_operations = {
  16         .llseek         = generic_file_llseek,
  17         .read_iter      = generic_file_read_iter,
  18         .write_iter     = generic_file_write_iter,
  19         .mmap           = generic_file_mmap,
  20         .fsync          = generic_file_fsync,
  21         .splice_read    = generic_file_splice_read,
  22 };
  23
  24 static int minix_setattr(struct dentry *dentry, struct iattr *attr)
  25 {
  26         struct inode *inode = d_inode(dentry);
  27         int error;
  28
  29         error = inode_change_ok(inode, attr);
  30         if (error)
  31                 return error;
  32
  33         if ((attr->ia_valid & ATTR_SIZE) &&
  34             attr->ia_size != i_size_read(inode)) {
  35                 error = inode_newsize_ok(inode, attr->ia_size);
  36                 if (error)
  37                         return error;
  38
  39                 truncate_setsize(inode, attr->ia_size);
  40                 minix_truncate(inode);
  41         }
  42
  43         setattr_copy(inode, attr);
  44         mark_inode_dirty(inode);
  45         return 0;
  46 }
  47
  48 const struct inode_operations minix_file_inode_operations = {
  49         .setattr        = minix_setattr,
  50         .getattr        = minix_getattr,
  51 };