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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/fs/minix/file.c
3 *
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 *
6 * minix regular file handling primitives
7 */
8
Linus Torvalds1da177e2005-04-16 15:20:36 -07009#include "minix.h"
10
11/*
12 * We have mostly NULLs here: the current defaults are OK for
13 * the minix filesystem.
14 */
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -080015const struct file_operations minix_file_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070016 .llseek = generic_file_llseek,
Al Viroaad4f8b2014-04-02 14:33:16 -040017 .read_iter = generic_file_read_iter,
Al Viro81742022014-04-03 03:17:43 -040018 .write_iter = generic_file_write_iter,
Linus Torvalds1da177e2005-04-16 15:20:36 -070019 .mmap = generic_file_mmap,
Christoph Hellwig1b061d92010-05-26 17:53:41 +020020 .fsync = generic_file_fsync,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +020021 .splice_read = generic_file_splice_read,
Linus Torvalds1da177e2005-04-16 15:20:36 -070022};
23
Christoph Hellwigd39aae92010-06-04 11:29:59 +020024static int minix_setattr(struct dentry *dentry, struct iattr *attr)
25{
David Howells2b0143b2015-03-17 22:25:59 +000026 struct inode *inode = d_inode(dentry);
Christoph Hellwigd39aae92010-06-04 11:29:59 +020027 int error;
28
29 error = inode_change_ok(inode, attr);
30 if (error)
31 return error;
Christoph Hellwig10257742010-06-04 11:30:02 +020032
33 if ((attr->ia_valid & ATTR_SIZE) &&
34 attr->ia_size != i_size_read(inode)) {
Marco Stornelli7fc7cd02012-12-15 11:56:25 +010035 error = inode_newsize_ok(inode, attr->ia_size);
Christoph Hellwig10257742010-06-04 11:30:02 +020036 if (error)
37 return error;
Marco Stornelli7fc7cd02012-12-15 11:56:25 +010038
39 truncate_setsize(inode, attr->ia_size);
40 minix_truncate(inode);
Christoph Hellwig10257742010-06-04 11:30:02 +020041 }
42
43 setattr_copy(inode, attr);
44 mark_inode_dirty(inode);
45 return 0;
Christoph Hellwigd39aae92010-06-04 11:29:59 +020046}
47
Arjan van de Ven92e1d5b2007-02-12 00:55:39 -080048const struct inode_operations minix_file_inode_operations = {
Christoph Hellwigd39aae92010-06-04 11:29:59 +020049 .setattr = minix_setattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -070050 .getattr = minix_getattr,
51};