1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * linux/fs/minix/file.c
4 *
5 * Copyright (C) 1991, 1992 Linus Torvalds
6 *
7 * minix regular file handling primitives
8 */
9
10 #include <linux/buffer_head.h>
11 #include "minix.h"
12
minix_fsync(struct file * file,loff_t start,loff_t end,int datasync)13 int minix_fsync(struct file *file, loff_t start, loff_t end, int datasync)
14 {
15 return mmb_fsync(file,
16 &minix_i(file->f_mapping->host)->i_metadata_bhs,
17 start, end, datasync);
18 }
19
20 /*
21 * We have mostly NULLs here: the current defaults are OK for
22 * the minix filesystem.
23 */
24 const struct file_operations minix_file_operations = {
25 .llseek = generic_file_llseek,
26 .read_iter = generic_file_read_iter,
27 .write_iter = generic_file_write_iter,
28 .mmap_prepare = generic_file_mmap_prepare,
29 .fsync = minix_fsync,
30 .splice_read = filemap_splice_read,
31 };
32
minix_setattr(struct mnt_idmap * idmap,struct dentry * dentry,struct iattr * attr)33 static int minix_setattr(struct mnt_idmap *idmap,
34 struct dentry *dentry, struct iattr *attr)
35 {
36 struct inode *inode = d_inode(dentry);
37 int error;
38
39 error = setattr_prepare(&nop_mnt_idmap, dentry, attr);
40 if (error)
41 return error;
42
43 if ((attr->ia_valid & ATTR_SIZE) &&
44 attr->ia_size != i_size_read(inode)) {
45 error = inode_newsize_ok(inode, attr->ia_size);
46 if (error)
47 return error;
48
49 truncate_setsize(inode, attr->ia_size);
50 minix_truncate(inode);
51 }
52
53 setattr_copy(&nop_mnt_idmap, inode, attr);
54 mark_inode_dirty(inode);
55 return 0;
56 }
57
58 const struct inode_operations minix_file_inode_operations = {
59 .setattr = minix_setattr,
60 .getattr = minix_getattr,
61 };
62