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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * linux/fs/sysv/file.c | |
4 | * | |
5 | * minix/file.c | |
6 | * Copyright (C) 1991, 1992 Linus Torvalds | |
7 | * | |
8 | * coh/file.c | |
9 | * Copyright (C) 1993 Pascal Haible, Bruno Haible | |
10 | * | |
11 | * sysv/file.c | |
12 | * Copyright (C) 1993 Bruno Haible | |
13 | * | |
14 | * SystemV/Coherent regular file handling primitives | |
15 | */ | |
16 | ||
17 | #include "sysv.h" | |
18 | ||
19 | /* | |
20 | * We have mostly NULLs here: the current defaults are OK for | |
21 | * the coh filesystem. | |
22 | */ | |
4b6f5d20 | 23 | const struct file_operations sysv_file_operations = { |
1da177e4 | 24 | .llseek = generic_file_llseek, |
aad4f8bb | 25 | .read_iter = generic_file_read_iter, |
8174202b | 26 | .write_iter = generic_file_write_iter, |
1da177e4 | 27 | .mmap = generic_file_mmap, |
1b061d92 | 28 | .fsync = generic_file_fsync, |
2cb1e089 | 29 | .splice_read = filemap_splice_read, |
1da177e4 LT |
30 | }; |
31 | ||
c1632a0f | 32 | static int sysv_setattr(struct mnt_idmap *idmap, |
549c7297 | 33 | struct dentry *dentry, struct iattr *attr) |
d39aae9e | 34 | { |
2b0143b5 | 35 | struct inode *inode = d_inode(dentry); |
d39aae9e CH |
36 | int error; |
37 | ||
c1632a0f | 38 | error = setattr_prepare(&nop_mnt_idmap, dentry, attr); |
d39aae9e CH |
39 | if (error) |
40 | return error; | |
1025774c CH |
41 | |
42 | if ((attr->ia_valid & ATTR_SIZE) && | |
43 | attr->ia_size != i_size_read(inode)) { | |
fa4d62ae | 44 | error = inode_newsize_ok(inode, attr->ia_size); |
1025774c CH |
45 | if (error) |
46 | return error; | |
fa4d62ae MS |
47 | truncate_setsize(inode, attr->ia_size); |
48 | sysv_truncate(inode); | |
1025774c CH |
49 | } |
50 | ||
c1632a0f | 51 | setattr_copy(&nop_mnt_idmap, inode, attr); |
1025774c CH |
52 | mark_inode_dirty(inode); |
53 | return 0; | |
d39aae9e CH |
54 | } |
55 | ||
c5ef1c42 | 56 | const struct inode_operations sysv_file_inode_operations = { |
d39aae9e | 57 | .setattr = sysv_setattr, |
1da177e4 LT |
58 | .getattr = sysv_getattr, |
59 | }; |