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)
11 * linux/fs/minix/file.c
13 * Copyright (C) 1991, 1992 Linus Torvalds
15 * ext2 fs regular file handling primitives
17 * 64-bit file support on 64-bit platforms by Jakub Jelinek
18 * (jj@sunsite.ms.mff.cuni.cz)
21 #include <linux/time.h>
22 #include <linux/pagemap.h>
23 #include <linux/dax.h>
24 #include <linux/quotaops.h>
30 static int ext2_dax_fault(struct vm_area_struct
*vma
, struct vm_fault
*vmf
)
32 return dax_fault(vma
, vmf
, ext2_get_block
, NULL
);
35 static int ext2_dax_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
)
37 return dax_mkwrite(vma
, vmf
, ext2_get_block
, NULL
);
40 static const struct vm_operations_struct ext2_dax_vm_ops
= {
41 .fault
= ext2_dax_fault
,
42 .page_mkwrite
= ext2_dax_mkwrite
,
43 .pfn_mkwrite
= dax_pfn_mkwrite
,
46 static int ext2_file_mmap(struct file
*file
, struct vm_area_struct
*vma
)
48 if (!IS_DAX(file_inode(file
)))
49 return generic_file_mmap(file
, vma
);
52 vma
->vm_ops
= &ext2_dax_vm_ops
;
53 vma
->vm_flags
|= VM_MIXEDMAP
;
57 #define ext2_file_mmap generic_file_mmap
61 * Called when filp is released. This happens when all file descriptors
62 * for a single struct file are closed. Note that different open() calls
63 * for the same file yield different struct file structures.
65 static int ext2_release_file (struct inode
* inode
, struct file
* filp
)
67 if (filp
->f_mode
& FMODE_WRITE
) {
68 mutex_lock(&EXT2_I(inode
)->truncate_mutex
);
69 ext2_discard_reservation(inode
);
70 mutex_unlock(&EXT2_I(inode
)->truncate_mutex
);
75 int ext2_fsync(struct file
*file
, loff_t start
, loff_t end
, int datasync
)
78 struct super_block
*sb
= file
->f_mapping
->host
->i_sb
;
79 struct address_space
*mapping
= sb
->s_bdev
->bd_inode
->i_mapping
;
81 ret
= generic_file_fsync(file
, start
, end
, datasync
);
82 if (ret
== -EIO
|| test_and_clear_bit(AS_EIO
, &mapping
->flags
)) {
83 /* We don't really know where the IO error happened... */
84 ext2_error(sb
, __func__
,
85 "detected IO error when writing metadata buffers");
92 * We have mostly NULL's here: the current defaults are ok for
93 * the ext2 filesystem.
95 const struct file_operations ext2_file_operations
= {
96 .llseek
= generic_file_llseek
,
97 .read_iter
= generic_file_read_iter
,
98 .write_iter
= generic_file_write_iter
,
99 .unlocked_ioctl
= ext2_ioctl
,
101 .compat_ioctl
= ext2_compat_ioctl
,
103 .mmap
= ext2_file_mmap
,
104 .open
= dquot_file_open
,
105 .release
= ext2_release_file
,
107 .splice_read
= generic_file_splice_read
,
108 .splice_write
= iter_file_splice_write
,
111 const struct inode_operations ext2_file_inode_operations
= {
112 #ifdef CONFIG_EXT2_FS_XATTR
113 .setxattr
= generic_setxattr
,
114 .getxattr
= generic_getxattr
,
115 .listxattr
= ext2_listxattr
,
116 .removexattr
= generic_removexattr
,
118 .setattr
= ext2_setattr
,
119 .get_acl
= ext2_get_acl
,
120 .set_acl
= ext2_set_acl
,
121 .fiemap
= ext2_fiemap
,