1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * linux/fs/minix/file.c
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 1991, 1992 Linus Torvalds
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * minix regular file handling primitives
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include "minix.h"
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun /*
13*4882a593Smuzhiyun * We have mostly NULLs here: the current defaults are OK for
14*4882a593Smuzhiyun * the minix filesystem.
15*4882a593Smuzhiyun */
16*4882a593Smuzhiyun const struct file_operations minix_file_operations = {
17*4882a593Smuzhiyun .llseek = generic_file_llseek,
18*4882a593Smuzhiyun .read_iter = generic_file_read_iter,
19*4882a593Smuzhiyun .write_iter = generic_file_write_iter,
20*4882a593Smuzhiyun .mmap = generic_file_mmap,
21*4882a593Smuzhiyun .fsync = generic_file_fsync,
22*4882a593Smuzhiyun .splice_read = generic_file_splice_read,
23*4882a593Smuzhiyun };
24*4882a593Smuzhiyun
minix_setattr(struct dentry * dentry,struct iattr * attr)25*4882a593Smuzhiyun static int minix_setattr(struct dentry *dentry, struct iattr *attr)
26*4882a593Smuzhiyun {
27*4882a593Smuzhiyun struct inode *inode = d_inode(dentry);
28*4882a593Smuzhiyun int error;
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun error = setattr_prepare(dentry, attr);
31*4882a593Smuzhiyun if (error)
32*4882a593Smuzhiyun return error;
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun if ((attr->ia_valid & ATTR_SIZE) &&
35*4882a593Smuzhiyun attr->ia_size != i_size_read(inode)) {
36*4882a593Smuzhiyun error = inode_newsize_ok(inode, attr->ia_size);
37*4882a593Smuzhiyun if (error)
38*4882a593Smuzhiyun return error;
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun truncate_setsize(inode, attr->ia_size);
41*4882a593Smuzhiyun minix_truncate(inode);
42*4882a593Smuzhiyun }
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun setattr_copy(inode, attr);
45*4882a593Smuzhiyun mark_inode_dirty(inode);
46*4882a593Smuzhiyun return 0;
47*4882a593Smuzhiyun }
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun const struct inode_operations minix_file_inode_operations = {
50*4882a593Smuzhiyun .setattr = minix_setattr,
51*4882a593Smuzhiyun .getattr = minix_getattr,
52*4882a593Smuzhiyun };
53