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Commit | Line | Data |
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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 | */ | |
22 | const struct file_operations sysv_file_operations = { | |
23 | .llseek = generic_file_llseek, | |
24 | .read_iter = generic_file_read_iter, | |
25 | .write_iter = generic_file_write_iter, | |
26 | .mmap = generic_file_mmap, | |
27 | .fsync = generic_file_fsync, | |
28 | .splice_read = generic_file_splice_read, | |
29 | }; | |
30 | ||
31 | static int sysv_setattr(struct dentry *dentry, struct iattr *attr) | |
32 | { | |
33 | struct inode *inode = d_inode(dentry); | |
34 | int error; | |
35 | ||
36 | error = inode_change_ok(inode, attr); | |
37 | if (error) | |
38 | return error; | |
39 | ||
40 | if ((attr->ia_valid & ATTR_SIZE) && | |
41 | attr->ia_size != i_size_read(inode)) { | |
42 | error = inode_newsize_ok(inode, attr->ia_size); | |
43 | if (error) | |
44 | return error; | |
45 | truncate_setsize(inode, attr->ia_size); | |
46 | sysv_truncate(inode); | |
47 | } | |
48 | ||
49 | setattr_copy(inode, attr); | |
50 | mark_inode_dirty(inode); | |
51 | return 0; | |
52 | } | |
53 | ||
54 | const struct inode_operations sysv_file_inode_operations = { | |
55 | .setattr = sysv_setattr, | |
56 | .getattr = sysv_getattr, | |
57 | }; |