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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/fs/sysv/file.c
3 *
4 * minix/file.c
5 * Copyright (C) 1991, 1992 Linus Torvalds
6 *
7 * coh/file.c
8 * Copyright (C) 1993 Pascal Haible, Bruno Haible
9 *
10 * sysv/file.c
11 * Copyright (C) 1993 Bruno Haible
12 *
13 * SystemV/Coherent regular file handling primitives
14 */
15
16#include "sysv.h"
17
18/*
19 * We have mostly NULLs here: the current defaults are OK for
20 * the coh filesystem.
21 */
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -080022const struct file_operations sysv_file_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070023 .llseek = generic_file_llseek,
Al Viroaad4f8b2014-04-02 14:33:16 -040024 .read_iter = generic_file_read_iter,
Al Viro81742022014-04-03 03:17:43 -040025 .write_iter = generic_file_write_iter,
Linus Torvalds1da177e2005-04-16 15:20:36 -070026 .mmap = generic_file_mmap,
Christoph Hellwig1b061d92010-05-26 17:53:41 +020027 .fsync = generic_file_fsync,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +020028 .splice_read = generic_file_splice_read,
Linus Torvalds1da177e2005-04-16 15:20:36 -070029};
30
Christoph Hellwigd39aae92010-06-04 11:29:59 +020031static int sysv_setattr(struct dentry *dentry, struct iattr *attr)
32{
David Howells2b0143b2015-03-17 22:25:59 +000033 struct inode *inode = d_inode(dentry);
Christoph Hellwigd39aae92010-06-04 11:29:59 +020034 int error;
35
36 error = inode_change_ok(inode, attr);
37 if (error)
38 return error;
Christoph Hellwig10257742010-06-04 11:30:02 +020039
40 if ((attr->ia_valid & ATTR_SIZE) &&
41 attr->ia_size != i_size_read(inode)) {
Marco Stornellifa4d62a2012-12-15 11:45:58 +010042 error = inode_newsize_ok(inode, attr->ia_size);
Christoph Hellwig10257742010-06-04 11:30:02 +020043 if (error)
44 return error;
Marco Stornellifa4d62a2012-12-15 11:45:58 +010045 truncate_setsize(inode, attr->ia_size);
46 sysv_truncate(inode);
Christoph Hellwig10257742010-06-04 11:30:02 +020047 }
48
49 setattr_copy(inode, attr);
50 mark_inode_dirty(inode);
51 return 0;
Christoph Hellwigd39aae92010-06-04 11:29:59 +020052}
53
Arjan van de Venc5ef1c42007-02-12 00:55:40 -080054const struct inode_operations sysv_file_inode_operations = {
Christoph Hellwigd39aae92010-06-04 11:29:59 +020055 .setattr = sysv_setattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -070056 .getattr = sysv_getattr,
57};