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>
22 #include <linux/pagemap.h>
23 #include <linux/quotaops.h>
24 #include "ext2.h"
25 #include "xattr.h"
26 #include "acl.h"
27
28 /*
29 * Called when filp is released. This happens when all file descriptors
30 * for a single struct file are closed. Note that different open() calls
31 * for the same file yield different struct file structures.
32 */
ext2_release_file(struct inode * inode,struct file * filp)33 static int ext2_release_file (struct inode * inode, struct file * filp)
34 {
35 if (filp->f_mode & FMODE_WRITE) {
36 mutex_lock(&EXT2_I(inode)->truncate_mutex);
37 ext2_discard_reservation(inode);
38 mutex_unlock(&EXT2_I(inode)->truncate_mutex);
39 }
40 return 0;
41 }
42
ext2_fsync(struct file * file,loff_t start,loff_t end,int datasync)43 int ext2_fsync(struct file *file, loff_t start, loff_t end, int datasync)
44 {
45 int ret;
46 struct super_block *sb = file->f_mapping->host->i_sb;
47 struct address_space *mapping = sb->s_bdev->bd_inode->i_mapping;
48
49 ret = generic_file_fsync(file, start, end, datasync);
50 if (ret == -EIO || test_and_clear_bit(AS_EIO, &mapping->flags)) {
51 /* We don't really know where the IO error happened... */
52 ext2_error(sb, __func__,
53 "detected IO error when writing metadata buffers");
54 ret = -EIO;
55 }
56 return ret;
57 }
58
59 /*
60 * We have mostly NULL's here: the current defaults are ok for
61 * the ext2 filesystem.
62 */
63 const struct file_operations ext2_file_operations = {
64 .llseek = generic_file_llseek,
65 .read = do_sync_read,
66 .write = do_sync_write,
67 .aio_read = generic_file_aio_read,
68 .aio_write = generic_file_aio_write,
69 .unlocked_ioctl = ext2_ioctl,
70 #ifdef CONFIG_COMPAT
71 .compat_ioctl = ext2_compat_ioctl,
72 #endif
73 .mmap = generic_file_mmap,
74 .open = dquot_file_open,
75 .release = ext2_release_file,
76 .fsync = ext2_fsync,
77 .splice_read = generic_file_splice_read,
78 .splice_write = generic_file_splice_write,
79 };
80
81 #ifdef CONFIG_EXT2_FS_XIP
82 const struct file_operations ext2_xip_file_operations = {
83 .llseek = generic_file_llseek,
84 .read = xip_file_read,
85 .write = xip_file_write,
86 .unlocked_ioctl = ext2_ioctl,
87 #ifdef CONFIG_COMPAT
88 .compat_ioctl = ext2_compat_ioctl,
89 #endif
90 .mmap = xip_file_mmap,
91 .open = dquot_file_open,
92 .release = ext2_release_file,
93 .fsync = ext2_fsync,
94 };
95 #endif
96
97 const struct inode_operations ext2_file_inode_operations = {
98 #ifdef CONFIG_EXT2_FS_XATTR
99 .setxattr = generic_setxattr,
100 .getxattr = generic_getxattr,
101 .listxattr = ext2_listxattr,
102 .removexattr = generic_removexattr,
103 #endif
104 .setattr = ext2_setattr,
105 .get_acl = ext2_get_acl,
106 .fiemap = ext2_fiemap,
107 };
108