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