1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * linux/fs/sysv/file.c
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * minix/file.c
6*4882a593Smuzhiyun * Copyright (C) 1991, 1992 Linus Torvalds
7*4882a593Smuzhiyun *
8*4882a593Smuzhiyun * coh/file.c
9*4882a593Smuzhiyun * Copyright (C) 1993 Pascal Haible, Bruno Haible
10*4882a593Smuzhiyun *
11*4882a593Smuzhiyun * sysv/file.c
12*4882a593Smuzhiyun * Copyright (C) 1993 Bruno Haible
13*4882a593Smuzhiyun *
14*4882a593Smuzhiyun * SystemV/Coherent regular file handling primitives
15*4882a593Smuzhiyun */
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun #include "sysv.h"
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun /*
20*4882a593Smuzhiyun * We have mostly NULLs here: the current defaults are OK for
21*4882a593Smuzhiyun * the coh filesystem.
22*4882a593Smuzhiyun */
23*4882a593Smuzhiyun const struct file_operations sysv_file_operations = {
24*4882a593Smuzhiyun .llseek = generic_file_llseek,
25*4882a593Smuzhiyun .read_iter = generic_file_read_iter,
26*4882a593Smuzhiyun .write_iter = generic_file_write_iter,
27*4882a593Smuzhiyun .mmap = generic_file_mmap,
28*4882a593Smuzhiyun .fsync = generic_file_fsync,
29*4882a593Smuzhiyun .splice_read = generic_file_splice_read,
30*4882a593Smuzhiyun };
31*4882a593Smuzhiyun
sysv_setattr(struct dentry * dentry,struct iattr * attr)32*4882a593Smuzhiyun static int sysv_setattr(struct dentry *dentry, struct iattr *attr)
33*4882a593Smuzhiyun {
34*4882a593Smuzhiyun struct inode *inode = d_inode(dentry);
35*4882a593Smuzhiyun int error;
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun error = setattr_prepare(dentry, attr);
38*4882a593Smuzhiyun if (error)
39*4882a593Smuzhiyun return error;
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun if ((attr->ia_valid & ATTR_SIZE) &&
42*4882a593Smuzhiyun attr->ia_size != i_size_read(inode)) {
43*4882a593Smuzhiyun error = inode_newsize_ok(inode, attr->ia_size);
44*4882a593Smuzhiyun if (error)
45*4882a593Smuzhiyun return error;
46*4882a593Smuzhiyun truncate_setsize(inode, attr->ia_size);
47*4882a593Smuzhiyun sysv_truncate(inode);
48*4882a593Smuzhiyun }
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun setattr_copy(inode, attr);
51*4882a593Smuzhiyun mark_inode_dirty(inode);
52*4882a593Smuzhiyun return 0;
53*4882a593Smuzhiyun }
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun const struct inode_operations sysv_file_inode_operations = {
56*4882a593Smuzhiyun .setattr = sysv_setattr,
57*4882a593Smuzhiyun .getattr = sysv_getattr,
58*4882a593Smuzhiyun };
59