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Merge tag 'sh-for-4.9' of git://git.libc.org/linux-sh
[mirror_ubuntu-zesty-kernel.git] / fs / sysv / file.c
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1/*
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 */
4b6f5d20 22const struct file_operations sysv_file_operations = {
1da177e4 23 .llseek = generic_file_llseek,
aad4f8bb 24 .read_iter = generic_file_read_iter,
8174202b 25 .write_iter = generic_file_write_iter,
1da177e4 26 .mmap = generic_file_mmap,
1b061d92 27 .fsync = generic_file_fsync,
5ffc4ef4 28 .splice_read = generic_file_splice_read,
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29};
30
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31static int sysv_setattr(struct dentry *dentry, struct iattr *attr)
32{
2b0143b5 33 struct inode *inode = d_inode(dentry);
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34 int error;
35
31051c85 36 error = setattr_prepare(dentry, attr);
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37 if (error)
38 return error;
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39
40 if ((attr->ia_valid & ATTR_SIZE) &&
41 attr->ia_size != i_size_read(inode)) {
fa4d62ae 42 error = inode_newsize_ok(inode, attr->ia_size);
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43 if (error)
44 return error;
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45 truncate_setsize(inode, attr->ia_size);
46 sysv_truncate(inode);
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47 }
48
49 setattr_copy(inode, attr);
50 mark_inode_dirty(inode);
51 return 0;
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52}
53
c5ef1c42 54const struct inode_operations sysv_file_inode_operations = {
d39aae9e 55 .setattr = sysv_setattr,
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56 .getattr = sysv_getattr,
57};