Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/fs/ext2/file.c | |
3 | * | |
4 | * Copyright (C) 1992, 1993, 1994, 1995 | |
5 | * Remy Card (card@masi.ibp.fr) | |
6 | * Laboratoire MASI - Institut Blaise Pascal | |
7 | * Universite Pierre et Marie Curie (Paris VI) | |
8 | * | |
9 | * from | |
10 | * | |
11 | * linux/fs/minix/file.c | |
12 | * | |
13 | * Copyright (C) 1991, 1992 Linus Torvalds | |
14 | * | |
15 | * ext2 fs regular file handling primitives | |
16 | * | |
17 | * 64-bit file support on 64-bit platforms by Jakub Jelinek | |
18 | * (jj@sunsite.ms.mff.cuni.cz) | |
19 | */ | |
20 | ||
21 | #include <linux/time.h> | |
48bde86d | 22 | #include <linux/pagemap.h> |
871a2931 | 23 | #include <linux/quotaops.h> |
1da177e4 LT |
24 | #include "ext2.h" |
25 | #include "xattr.h" | |
26 | #include "acl.h" | |
27 | ||
6cd176a5 | 28 | #ifdef CONFIG_FS_DAX |
f7ca90b1 MW |
29 | static int ext2_dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
30 | { | |
31 | return dax_fault(vma, vmf, ext2_get_block); | |
32 | } | |
33 | ||
34 | static int ext2_dax_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) | |
35 | { | |
36 | return dax_mkwrite(vma, vmf, ext2_get_block); | |
37 | } | |
38 | ||
39 | static const struct vm_operations_struct ext2_dax_vm_ops = { | |
40 | .fault = ext2_dax_fault, | |
41 | .page_mkwrite = ext2_dax_mkwrite, | |
0e3b210c | 42 | .pfn_mkwrite = dax_pfn_mkwrite, |
f7ca90b1 MW |
43 | }; |
44 | ||
45 | static int ext2_file_mmap(struct file *file, struct vm_area_struct *vma) | |
46 | { | |
47 | if (!IS_DAX(file_inode(file))) | |
48 | return generic_file_mmap(file, vma); | |
49 | ||
50 | file_accessed(file); | |
51 | vma->vm_ops = &ext2_dax_vm_ops; | |
52 | vma->vm_flags |= VM_MIXEDMAP; | |
53 | return 0; | |
54 | } | |
55 | #else | |
56 | #define ext2_file_mmap generic_file_mmap | |
57 | #endif | |
58 | ||
1da177e4 | 59 | /* |
a6739af8 JK |
60 | * Called when filp is released. This happens when all file descriptors |
61 | * for a single struct file are closed. Note that different open() calls | |
62 | * for the same file yield different struct file structures. | |
1da177e4 LT |
63 | */ |
64 | static int ext2_release_file (struct inode * inode, struct file * filp) | |
65 | { | |
a686cd89 MB |
66 | if (filp->f_mode & FMODE_WRITE) { |
67 | mutex_lock(&EXT2_I(inode)->truncate_mutex); | |
68 | ext2_discard_reservation(inode); | |
69 | mutex_unlock(&EXT2_I(inode)->truncate_mutex); | |
70 | } | |
1da177e4 LT |
71 | return 0; |
72 | } | |
73 | ||
02c24a82 | 74 | int ext2_fsync(struct file *file, loff_t start, loff_t end, int datasync) |
48bde86d JK |
75 | { |
76 | int ret; | |
7ea80859 | 77 | struct super_block *sb = file->f_mapping->host->i_sb; |
48bde86d JK |
78 | struct address_space *mapping = sb->s_bdev->bd_inode->i_mapping; |
79 | ||
02c24a82 | 80 | ret = generic_file_fsync(file, start, end, datasync); |
48bde86d JK |
81 | if (ret == -EIO || test_and_clear_bit(AS_EIO, &mapping->flags)) { |
82 | /* We don't really know where the IO error happened... */ | |
83 | ext2_error(sb, __func__, | |
84 | "detected IO error when writing metadata buffers"); | |
85 | ret = -EIO; | |
86 | } | |
87 | return ret; | |
88 | } | |
89 | ||
1da177e4 LT |
90 | /* |
91 | * We have mostly NULL's here: the current defaults are ok for | |
92 | * the ext2 filesystem. | |
93 | */ | |
4b6f5d20 | 94 | const struct file_operations ext2_file_operations = { |
1da177e4 | 95 | .llseek = generic_file_llseek, |
aad4f8bb | 96 | .read_iter = generic_file_read_iter, |
8174202b | 97 | .write_iter = generic_file_write_iter, |
14f9f7b2 | 98 | .unlocked_ioctl = ext2_ioctl, |
e322ff07 DH |
99 | #ifdef CONFIG_COMPAT |
100 | .compat_ioctl = ext2_compat_ioctl, | |
101 | #endif | |
f7ca90b1 | 102 | .mmap = ext2_file_mmap, |
907f4554 | 103 | .open = dquot_file_open, |
1da177e4 | 104 | .release = ext2_release_file, |
48bde86d | 105 | .fsync = ext2_fsync, |
5274f052 | 106 | .splice_read = generic_file_splice_read, |
8d020765 | 107 | .splice_write = iter_file_splice_write, |
1da177e4 LT |
108 | }; |
109 | ||
754661f1 | 110 | const struct inode_operations ext2_file_inode_operations = { |
1da177e4 LT |
111 | #ifdef CONFIG_EXT2_FS_XATTR |
112 | .setxattr = generic_setxattr, | |
113 | .getxattr = generic_getxattr, | |
114 | .listxattr = ext2_listxattr, | |
115 | .removexattr = generic_removexattr, | |
116 | #endif | |
117 | .setattr = ext2_setattr, | |
4e34e719 | 118 | .get_acl = ext2_get_acl, |
64e178a7 | 119 | .set_acl = ext2_set_acl, |
68c9d702 | 120 | .fiemap = ext2_fiemap, |
1da177e4 | 121 | }; |