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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, | |
42 | }; | |
43 | ||
44 | static int ext2_file_mmap(struct file *file, struct vm_area_struct *vma) | |
45 | { | |
46 | if (!IS_DAX(file_inode(file))) | |
47 | return generic_file_mmap(file, vma); | |
48 | ||
49 | file_accessed(file); | |
50 | vma->vm_ops = &ext2_dax_vm_ops; | |
51 | vma->vm_flags |= VM_MIXEDMAP; | |
52 | return 0; | |
53 | } | |
54 | #else | |
55 | #define ext2_file_mmap generic_file_mmap | |
56 | #endif | |
57 | ||
1da177e4 | 58 | /* |
a6739af8 JK |
59 | * Called when filp is released. This happens when all file descriptors |
60 | * for a single struct file are closed. Note that different open() calls | |
61 | * for the same file yield different struct file structures. | |
1da177e4 LT |
62 | */ |
63 | static int ext2_release_file (struct inode * inode, struct file * filp) | |
64 | { | |
a686cd89 MB |
65 | if (filp->f_mode & FMODE_WRITE) { |
66 | mutex_lock(&EXT2_I(inode)->truncate_mutex); | |
67 | ext2_discard_reservation(inode); | |
68 | mutex_unlock(&EXT2_I(inode)->truncate_mutex); | |
69 | } | |
1da177e4 LT |
70 | return 0; |
71 | } | |
72 | ||
02c24a82 | 73 | int ext2_fsync(struct file *file, loff_t start, loff_t end, int datasync) |
48bde86d JK |
74 | { |
75 | int ret; | |
7ea80859 | 76 | struct super_block *sb = file->f_mapping->host->i_sb; |
48bde86d JK |
77 | struct address_space *mapping = sb->s_bdev->bd_inode->i_mapping; |
78 | ||
02c24a82 | 79 | ret = generic_file_fsync(file, start, end, datasync); |
48bde86d JK |
80 | if (ret == -EIO || test_and_clear_bit(AS_EIO, &mapping->flags)) { |
81 | /* We don't really know where the IO error happened... */ | |
82 | ext2_error(sb, __func__, | |
83 | "detected IO error when writing metadata buffers"); | |
84 | ret = -EIO; | |
85 | } | |
86 | return ret; | |
87 | } | |
88 | ||
1da177e4 LT |
89 | /* |
90 | * We have mostly NULL's here: the current defaults are ok for | |
91 | * the ext2 filesystem. | |
92 | */ | |
4b6f5d20 | 93 | const struct file_operations ext2_file_operations = { |
1da177e4 | 94 | .llseek = generic_file_llseek, |
aad4f8bb | 95 | .read = new_sync_read, |
8174202b | 96 | .write = new_sync_write, |
aad4f8bb | 97 | .read_iter = generic_file_read_iter, |
8174202b | 98 | .write_iter = generic_file_write_iter, |
14f9f7b2 | 99 | .unlocked_ioctl = ext2_ioctl, |
e322ff07 DH |
100 | #ifdef CONFIG_COMPAT |
101 | .compat_ioctl = ext2_compat_ioctl, | |
102 | #endif | |
f7ca90b1 | 103 | .mmap = ext2_file_mmap, |
907f4554 | 104 | .open = dquot_file_open, |
1da177e4 | 105 | .release = ext2_release_file, |
48bde86d | 106 | .fsync = ext2_fsync, |
5274f052 | 107 | .splice_read = generic_file_splice_read, |
8d020765 | 108 | .splice_write = iter_file_splice_write, |
1da177e4 LT |
109 | }; |
110 | ||
6cd176a5 | 111 | #ifdef CONFIG_FS_DAX |
9c3ce9ec | 112 | const struct file_operations ext2_dax_file_operations = { |
6d79125b | 113 | .llseek = generic_file_llseek, |
d475c634 MW |
114 | .read = new_sync_read, |
115 | .write = new_sync_write, | |
116 | .read_iter = generic_file_read_iter, | |
117 | .write_iter = generic_file_write_iter, | |
14f9f7b2 | 118 | .unlocked_ioctl = ext2_ioctl, |
e322ff07 DH |
119 | #ifdef CONFIG_COMPAT |
120 | .compat_ioctl = ext2_compat_ioctl, | |
121 | #endif | |
f7ca90b1 | 122 | .mmap = ext2_file_mmap, |
907f4554 | 123 | .open = dquot_file_open, |
6d79125b | 124 | .release = ext2_release_file, |
48bde86d | 125 | .fsync = ext2_fsync, |
6d79125b CO |
126 | }; |
127 | #endif | |
128 | ||
754661f1 | 129 | const struct inode_operations ext2_file_inode_operations = { |
1da177e4 LT |
130 | #ifdef CONFIG_EXT2_FS_XATTR |
131 | .setxattr = generic_setxattr, | |
132 | .getxattr = generic_getxattr, | |
133 | .listxattr = ext2_listxattr, | |
134 | .removexattr = generic_removexattr, | |
135 | #endif | |
136 | .setattr = ext2_setattr, | |
4e34e719 | 137 | .get_acl = ext2_get_acl, |
64e178a7 | 138 | .set_acl = ext2_set_acl, |
68c9d702 | 139 | .fiemap = ext2_fiemap, |
1da177e4 | 140 | }; |