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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * linux/fs/bad_inode.c
4 *
5 * Copyright (C) 1997, Stephen Tweedie
6 *
7 * Provide stub functions for unreadable inodes
8 *
9 * Fabian Frederick : August 2003 - All file operations assigned to EIO
10 */
11
12#include <linux/fs.h>
13#include <linux/export.h>
14#include <linux/stat.h>
15#include <linux/time.h>
16#include <linux/namei.h>
17#include <linux/poll.h>
18#include <linux/fiemap.h>
19
20static int bad_file_open(struct inode *inode, struct file *filp)
21{
22 return -EIO;
23}
24
25static const struct file_operations bad_file_ops =
26{
27 .open = bad_file_open,
28};
29
30static int bad_inode_create(struct mnt_idmap *idmap,
31 struct inode *dir, struct dentry *dentry,
32 umode_t mode, bool excl)
33{
34 return -EIO;
35}
36
37static struct dentry *bad_inode_lookup(struct inode *dir,
38 struct dentry *dentry, unsigned int flags)
39{
40 return ERR_PTR(-EIO);
41}
42
43static int bad_inode_link (struct dentry *old_dentry, struct inode *dir,
44 struct dentry *dentry)
45{
46 return -EIO;
47}
48
49static int bad_inode_unlink(struct inode *dir, struct dentry *dentry)
50{
51 return -EIO;
52}
53
54static int bad_inode_symlink(struct mnt_idmap *idmap,
55 struct inode *dir, struct dentry *dentry,
56 const char *symname)
57{
58 return -EIO;
59}
60
61static int bad_inode_mkdir(struct mnt_idmap *idmap, struct inode *dir,
62 struct dentry *dentry, umode_t mode)
63{
64 return -EIO;
65}
66
67static int bad_inode_rmdir (struct inode *dir, struct dentry *dentry)
68{
69 return -EIO;
70}
71
72static int bad_inode_mknod(struct mnt_idmap *idmap, struct inode *dir,
73 struct dentry *dentry, umode_t mode, dev_t rdev)
74{
75 return -EIO;
76}
77
78static int bad_inode_rename2(struct mnt_idmap *idmap,
79 struct inode *old_dir, struct dentry *old_dentry,
80 struct inode *new_dir, struct dentry *new_dentry,
81 unsigned int flags)
82{
83 return -EIO;
84}
85
86static int bad_inode_readlink(struct dentry *dentry, char __user *buffer,
87 int buflen)
88{
89 return -EIO;
90}
91
92static int bad_inode_permission(struct mnt_idmap *idmap,
93 struct inode *inode, int mask)
94{
95 return -EIO;
96}
97
98static int bad_inode_getattr(struct mnt_idmap *idmap,
99 const struct path *path, struct kstat *stat,
100 u32 request_mask, unsigned int query_flags)
101{
102 return -EIO;
103}
104
105static int bad_inode_setattr(struct mnt_idmap *idmap,
106 struct dentry *direntry, struct iattr *attrs)
107{
108 return -EIO;
109}
110
111static ssize_t bad_inode_listxattr(struct dentry *dentry, char *buffer,
112 size_t buffer_size)
113{
114 return -EIO;
115}
116
117static const char *bad_inode_get_link(struct dentry *dentry,
118 struct inode *inode,
119 struct delayed_call *done)
120{
121 return ERR_PTR(-EIO);
122}
123
124static struct posix_acl *bad_inode_get_acl(struct inode *inode, int type, bool rcu)
125{
126 return ERR_PTR(-EIO);
127}
128
129static int bad_inode_fiemap(struct inode *inode,
130 struct fiemap_extent_info *fieinfo, u64 start,
131 u64 len)
132{
133 return -EIO;
134}
135
136static int bad_inode_update_time(struct inode *inode, int flags)
137{
138 return -EIO;
139}
140
141static int bad_inode_atomic_open(struct inode *inode, struct dentry *dentry,
142 struct file *file, unsigned int open_flag,
143 umode_t create_mode)
144{
145 return -EIO;
146}
147
148static int bad_inode_tmpfile(struct mnt_idmap *idmap,
149 struct inode *inode, struct file *file,
150 umode_t mode)
151{
152 return -EIO;
153}
154
155static int bad_inode_set_acl(struct mnt_idmap *idmap,
156 struct dentry *dentry, struct posix_acl *acl,
157 int type)
158{
159 return -EIO;
160}
161
162static const struct inode_operations bad_inode_ops =
163{
164 .create = bad_inode_create,
165 .lookup = bad_inode_lookup,
166 .link = bad_inode_link,
167 .unlink = bad_inode_unlink,
168 .symlink = bad_inode_symlink,
169 .mkdir = bad_inode_mkdir,
170 .rmdir = bad_inode_rmdir,
171 .mknod = bad_inode_mknod,
172 .rename = bad_inode_rename2,
173 .readlink = bad_inode_readlink,
174 .permission = bad_inode_permission,
175 .getattr = bad_inode_getattr,
176 .setattr = bad_inode_setattr,
177 .listxattr = bad_inode_listxattr,
178 .get_link = bad_inode_get_link,
179 .get_inode_acl = bad_inode_get_acl,
180 .fiemap = bad_inode_fiemap,
181 .update_time = bad_inode_update_time,
182 .atomic_open = bad_inode_atomic_open,
183 .tmpfile = bad_inode_tmpfile,
184 .set_acl = bad_inode_set_acl,
185};
186
187
188/*
189 * When a filesystem is unable to read an inode due to an I/O error in
190 * its read_inode() function, it can call make_bad_inode() to return a
191 * set of stubs which will return EIO errors as required.
192 *
193 * We only need to do limited initialisation: all other fields are
194 * preinitialised to zero automatically.
195 */
196
197/**
198 * make_bad_inode - mark an inode bad due to an I/O error
199 * @inode: Inode to mark bad
200 *
201 * When an inode cannot be read due to a media or remote network
202 * failure this function makes the inode "bad" and causes I/O operations
203 * on it to fail from this point on.
204 */
205
206void make_bad_inode(struct inode *inode)
207{
208 remove_inode_hash(inode);
209
210 inode->i_mode = S_IFREG;
211 simple_inode_init_ts(inode);
212 inode->i_op = &bad_inode_ops;
213 inode->i_opflags &= ~IOP_XATTR;
214 inode->i_fop = &bad_file_ops;
215}
216EXPORT_SYMBOL(make_bad_inode);
217
218/*
219 * This tests whether an inode has been flagged as bad. The test uses
220 * &bad_inode_ops to cover the case of invalidated inodes as well as
221 * those created by make_bad_inode() above.
222 */
223
224/**
225 * is_bad_inode - is an inode errored
226 * @inode: inode to test
227 *
228 * Returns true if the inode in question has been marked as bad.
229 */
230
231bool is_bad_inode(struct inode *inode)
232{
233 return (inode->i_op == &bad_inode_ops);
234}
235
236EXPORT_SYMBOL(is_bad_inode);
237
238/**
239 * iget_failed - Mark an under-construction inode as dead and release it
240 * @inode: The inode to discard
241 *
242 * Mark an under-construction inode as dead and release it.
243 */
244void iget_failed(struct inode *inode)
245{
246 make_bad_inode(inode);
247 unlock_new_inode(inode);
248 iput(inode);
249}
250EXPORT_SYMBOL(iget_failed);
1/*
2 * linux/fs/bad_inode.c
3 *
4 * Copyright (C) 1997, Stephen Tweedie
5 *
6 * Provide stub functions for unreadable inodes
7 *
8 * Fabian Frederick : August 2003 - All file operations assigned to EIO
9 */
10
11#include <linux/fs.h>
12#include <linux/export.h>
13#include <linux/stat.h>
14#include <linux/time.h>
15#include <linux/namei.h>
16#include <linux/poll.h>
17
18static int bad_file_open(struct inode *inode, struct file *filp)
19{
20 return -EIO;
21}
22
23static const struct file_operations bad_file_ops =
24{
25 .open = bad_file_open,
26};
27
28static int bad_inode_create (struct inode *dir, struct dentry *dentry,
29 umode_t mode, bool excl)
30{
31 return -EIO;
32}
33
34static struct dentry *bad_inode_lookup(struct inode *dir,
35 struct dentry *dentry, unsigned int flags)
36{
37 return ERR_PTR(-EIO);
38}
39
40static int bad_inode_link (struct dentry *old_dentry, struct inode *dir,
41 struct dentry *dentry)
42{
43 return -EIO;
44}
45
46static int bad_inode_unlink(struct inode *dir, struct dentry *dentry)
47{
48 return -EIO;
49}
50
51static int bad_inode_symlink (struct inode *dir, struct dentry *dentry,
52 const char *symname)
53{
54 return -EIO;
55}
56
57static int bad_inode_mkdir(struct inode *dir, struct dentry *dentry,
58 umode_t mode)
59{
60 return -EIO;
61}
62
63static int bad_inode_rmdir (struct inode *dir, struct dentry *dentry)
64{
65 return -EIO;
66}
67
68static int bad_inode_mknod (struct inode *dir, struct dentry *dentry,
69 umode_t mode, dev_t rdev)
70{
71 return -EIO;
72}
73
74static int bad_inode_rename2(struct inode *old_dir, struct dentry *old_dentry,
75 struct inode *new_dir, struct dentry *new_dentry,
76 unsigned int flags)
77{
78 return -EIO;
79}
80
81static int bad_inode_readlink(struct dentry *dentry, char __user *buffer,
82 int buflen)
83{
84 return -EIO;
85}
86
87static int bad_inode_permission(struct inode *inode, int mask)
88{
89 return -EIO;
90}
91
92static int bad_inode_getattr(struct vfsmount *mnt, struct dentry *dentry,
93 struct kstat *stat)
94{
95 return -EIO;
96}
97
98static int bad_inode_setattr(struct dentry *direntry, struct iattr *attrs)
99{
100 return -EIO;
101}
102
103static int bad_inode_setxattr(struct dentry *dentry, const char *name,
104 const void *value, size_t size, int flags)
105{
106 return -EIO;
107}
108
109static ssize_t bad_inode_getxattr(struct dentry *dentry, const char *name,
110 void *buffer, size_t size)
111{
112 return -EIO;
113}
114
115static ssize_t bad_inode_listxattr(struct dentry *dentry, char *buffer,
116 size_t buffer_size)
117{
118 return -EIO;
119}
120
121static int bad_inode_removexattr(struct dentry *dentry, const char *name)
122{
123 return -EIO;
124}
125
126static const struct inode_operations bad_inode_ops =
127{
128 .create = bad_inode_create,
129 .lookup = bad_inode_lookup,
130 .link = bad_inode_link,
131 .unlink = bad_inode_unlink,
132 .symlink = bad_inode_symlink,
133 .mkdir = bad_inode_mkdir,
134 .rmdir = bad_inode_rmdir,
135 .mknod = bad_inode_mknod,
136 .rename2 = bad_inode_rename2,
137 .readlink = bad_inode_readlink,
138 /* follow_link must be no-op, otherwise unmounting this inode
139 won't work */
140 /* put_link returns void */
141 /* truncate returns void */
142 .permission = bad_inode_permission,
143 .getattr = bad_inode_getattr,
144 .setattr = bad_inode_setattr,
145 .setxattr = bad_inode_setxattr,
146 .getxattr = bad_inode_getxattr,
147 .listxattr = bad_inode_listxattr,
148 .removexattr = bad_inode_removexattr,
149};
150
151
152/*
153 * When a filesystem is unable to read an inode due to an I/O error in
154 * its read_inode() function, it can call make_bad_inode() to return a
155 * set of stubs which will return EIO errors as required.
156 *
157 * We only need to do limited initialisation: all other fields are
158 * preinitialised to zero automatically.
159 */
160
161/**
162 * make_bad_inode - mark an inode bad due to an I/O error
163 * @inode: Inode to mark bad
164 *
165 * When an inode cannot be read due to a media or remote network
166 * failure this function makes the inode "bad" and causes I/O operations
167 * on it to fail from this point on.
168 */
169
170void make_bad_inode(struct inode *inode)
171{
172 remove_inode_hash(inode);
173
174 inode->i_mode = S_IFREG;
175 inode->i_atime = inode->i_mtime = inode->i_ctime =
176 current_fs_time(inode->i_sb);
177 inode->i_op = &bad_inode_ops;
178 inode->i_fop = &bad_file_ops;
179}
180EXPORT_SYMBOL(make_bad_inode);
181
182/*
183 * This tests whether an inode has been flagged as bad. The test uses
184 * &bad_inode_ops to cover the case of invalidated inodes as well as
185 * those created by make_bad_inode() above.
186 */
187
188/**
189 * is_bad_inode - is an inode errored
190 * @inode: inode to test
191 *
192 * Returns true if the inode in question has been marked as bad.
193 */
194
195bool is_bad_inode(struct inode *inode)
196{
197 return (inode->i_op == &bad_inode_ops);
198}
199
200EXPORT_SYMBOL(is_bad_inode);
201
202/**
203 * iget_failed - Mark an under-construction inode as dead and release it
204 * @inode: The inode to discard
205 *
206 * Mark an under-construction inode as dead and release it.
207 */
208void iget_failed(struct inode *inode)
209{
210 make_bad_inode(inode);
211 unlock_new_inode(inode);
212 iput(inode);
213}
214EXPORT_SYMBOL(iget_failed);