blob: 0a65939508e964f609b6e5ab7432cc2e177a45ad [file] [log] [blame]
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,
Badari Pulavarty543ade12006-09-30 23:28:48 -070024 .read = do_sync_read,
25 .aio_read = generic_file_aio_read,
26 .write = do_sync_write,
27 .aio_write = generic_file_aio_write,
Linus Torvalds1da177e2005-04-16 15:20:36 -070028 .mmap = generic_file_mmap,
Christoph Hellwig1b061d92010-05-26 17:53:41 +020029 .fsync = generic_file_fsync,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +020030 .splice_read = generic_file_splice_read,
Linus Torvalds1da177e2005-04-16 15:20:36 -070031};
32
Christoph Hellwigd39aae92010-06-04 11:29:59 +020033static int sysv_setattr(struct dentry *dentry, struct iattr *attr)
34{
35 struct inode *inode = dentry->d_inode;
36 int error;
37
38 error = inode_change_ok(inode, attr);
39 if (error)
40 return error;
Christoph Hellwig10257742010-06-04 11:30:02 +020041
42 if ((attr->ia_valid & ATTR_SIZE) &&
43 attr->ia_size != i_size_read(inode)) {
44 error = vmtruncate(inode, attr->ia_size);
45 if (error)
46 return error;
47 }
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 = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070055 .truncate = sysv_truncate,
Christoph Hellwigd39aae92010-06-04 11:29:59 +020056 .setattr = sysv_setattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -070057 .getattr = sysv_getattr,
58};