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 "minix.h" |
11 | |
12 | /* |
13 | * We have mostly NULLs here: the current defaults are OK for |
14 | * the minix filesystem. |
15 | */ |
16 | const struct file_operations minix_file_operations = { |
17 | .llseek = generic_file_llseek, |
18 | .read_iter = generic_file_read_iter, |
19 | .write_iter = generic_file_write_iter, |
20 | .mmap = generic_file_mmap, |
21 | .fsync = generic_file_fsync, |
22 | .splice_read = filemap_splice_read, |
23 | }; |
24 | |
25 | static int minix_setattr(struct mnt_idmap *idmap, |
26 | struct dentry *dentry, struct iattr *attr) |
27 | { |
28 | struct inode *inode = d_inode(dentry); |
29 | int error; |
30 | |
31 | error = setattr_prepare(&nop_mnt_idmap, dentry, attr); |
32 | if (error) |
33 | return error; |
34 | |
35 | if ((attr->ia_valid & ATTR_SIZE) && |
36 | attr->ia_size != i_size_read(inode)) { |
37 | error = inode_newsize_ok(inode, offset: attr->ia_size); |
38 | if (error) |
39 | return error; |
40 | |
41 | truncate_setsize(inode, newsize: attr->ia_size); |
42 | minix_truncate(inode); |
43 | } |
44 | |
45 | setattr_copy(&nop_mnt_idmap, inode, attr); |
46 | mark_inode_dirty(inode); |
47 | return 0; |
48 | } |
49 | |
50 | const struct inode_operations minix_file_inode_operations = { |
51 | .setattr = minix_setattr, |
52 | .getattr = minix_getattr, |
53 | }; |
54 | |