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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// 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 inode *dir, struct dentry *dentry,
31 umode_t mode, bool excl)
32{
33 return -EIO;
34}
35
36static struct dentry *bad_inode_lookup(struct inode *dir,
37 struct dentry *dentry, unsigned int flags)
38{
39 return ERR_PTR(-EIO);
40}
41
42static int bad_inode_link (struct dentry *old_dentry, struct inode *dir,
43 struct dentry *dentry)
44{
45 return -EIO;
46}
47
48static int bad_inode_unlink(struct inode *dir, struct dentry *dentry)
49{
50 return -EIO;
51}
52
53static int bad_inode_symlink (struct inode *dir, struct dentry *dentry,
54 const char *symname)
55{
56 return -EIO;
57}
58
59static int bad_inode_mkdir(struct inode *dir, struct dentry *dentry,
60 umode_t mode)
61{
62 return -EIO;
63}
64
65static int bad_inode_rmdir (struct inode *dir, struct dentry *dentry)
66{
67 return -EIO;
68}
69
70static int bad_inode_mknod (struct inode *dir, struct dentry *dentry,
71 umode_t mode, dev_t rdev)
72{
73 return -EIO;
74}
75
76static int bad_inode_rename2(struct inode *old_dir, struct dentry *old_dentry,
77 struct inode *new_dir, struct dentry *new_dentry,
78 unsigned int flags)
79{
80 return -EIO;
81}
82
83static int bad_inode_readlink(struct dentry *dentry, char __user *buffer,
84 int buflen)
85{
86 return -EIO;
87}
88
89static int bad_inode_permission(struct inode *inode, int mask)
90{
91 return -EIO;
92}
93
94static int bad_inode_getattr(const struct path *path, struct kstat *stat,
95 u32 request_mask, unsigned int query_flags)
96{
97 return -EIO;
98}
99
100static int bad_inode_setattr(struct dentry *direntry, struct iattr *attrs)
101{
102 return -EIO;
103}
104
105static ssize_t bad_inode_listxattr(struct dentry *dentry, char *buffer,
106 size_t buffer_size)
107{
108 return -EIO;
109}
110
111static const char *bad_inode_get_link(struct dentry *dentry,
112 struct inode *inode,
113 struct delayed_call *done)
114{
115 return ERR_PTR(-EIO);
116}
117
118static struct posix_acl *bad_inode_get_acl(struct inode *inode, int type)
119{
120 return ERR_PTR(-EIO);
121}
122
123static int bad_inode_fiemap(struct inode *inode,
124 struct fiemap_extent_info *fieinfo, u64 start,
125 u64 len)
126{
127 return -EIO;
128}
129
130static int bad_inode_update_time(struct inode *inode, struct timespec64 *time,
131 int flags)
132{
133 return -EIO;
134}
135
136static int bad_inode_atomic_open(struct inode *inode, struct dentry *dentry,
137 struct file *file, unsigned int open_flag,
138 umode_t create_mode)
139{
140 return -EIO;
141}
142
143static int bad_inode_tmpfile(struct inode *inode, struct dentry *dentry,
144 umode_t mode)
145{
146 return -EIO;
147}
148
149static int bad_inode_set_acl(struct inode *inode, struct posix_acl *acl,
150 int type)
151{
152 return -EIO;
153}
154
155static const struct inode_operations bad_inode_ops =
156{
157 .create = bad_inode_create,
158 .lookup = bad_inode_lookup,
159 .link = bad_inode_link,
160 .unlink = bad_inode_unlink,
161 .symlink = bad_inode_symlink,
162 .mkdir = bad_inode_mkdir,
163 .rmdir = bad_inode_rmdir,
164 .mknod = bad_inode_mknod,
165 .rename = bad_inode_rename2,
166 .readlink = bad_inode_readlink,
167 .permission = bad_inode_permission,
168 .getattr = bad_inode_getattr,
169 .setattr = bad_inode_setattr,
170 .listxattr = bad_inode_listxattr,
171 .get_link = bad_inode_get_link,
172 .get_acl = bad_inode_get_acl,
173 .fiemap = bad_inode_fiemap,
174 .update_time = bad_inode_update_time,
175 .atomic_open = bad_inode_atomic_open,
176 .tmpfile = bad_inode_tmpfile,
177 .set_acl = bad_inode_set_acl,
178};
179
180
181/*
182 * When a filesystem is unable to read an inode due to an I/O error in
183 * its read_inode() function, it can call make_bad_inode() to return a
184 * set of stubs which will return EIO errors as required.
185 *
186 * We only need to do limited initialisation: all other fields are
187 * preinitialised to zero automatically.
188 */
189
190/**
191 * make_bad_inode - mark an inode bad due to an I/O error
192 * @inode: Inode to mark bad
193 *
194 * When an inode cannot be read due to a media or remote network
195 * failure this function makes the inode "bad" and causes I/O operations
196 * on it to fail from this point on.
197 */
198
199void make_bad_inode(struct inode *inode)
200{
201 remove_inode_hash(inode);
202
203 inode->i_mode = S_IFREG;
204 inode->i_atime = inode->i_mtime = inode->i_ctime =
205 current_time(inode);
206 inode->i_op = &bad_inode_ops;
207 inode->i_opflags &= ~IOP_XATTR;
208 inode->i_fop = &bad_file_ops;
209}
210EXPORT_SYMBOL(make_bad_inode);
211
212/*
213 * This tests whether an inode has been flagged as bad. The test uses
214 * &bad_inode_ops to cover the case of invalidated inodes as well as
215 * those created by make_bad_inode() above.
216 */
217
218/**
219 * is_bad_inode - is an inode errored
220 * @inode: inode to test
221 *
222 * Returns true if the inode in question has been marked as bad.
223 */
224
225bool is_bad_inode(struct inode *inode)
226{
227 return (inode->i_op == &bad_inode_ops);
228}
229
230EXPORT_SYMBOL(is_bad_inode);
231
232/**
233 * iget_failed - Mark an under-construction inode as dead and release it
234 * @inode: The inode to discard
235 *
236 * Mark an under-construction inode as dead and release it.
237 */
238void iget_failed(struct inode *inode)
239{
240 make_bad_inode(inode);
241 unlock_new_inode(inode);
242 iput(inode);
243}
244EXPORT_SYMBOL(iget_failed);