1 // SPDX-License-Identifier: GPL-2.0 <<
2 /* 1 /*
3 * linux/fs/bad_inode.c 2 * linux/fs/bad_inode.c
4 * 3 *
5 * Copyright (C) 1997, Stephen Tweedie 4 * Copyright (C) 1997, Stephen Tweedie
6 * 5 *
7 * Provide stub functions for unreadable inod 6 * Provide stub functions for unreadable inodes
8 * 7 *
9 * Fabian Frederick : August 2003 - All file 8 * Fabian Frederick : August 2003 - All file operations assigned to EIO
10 */ 9 */
11 10
12 #include <linux/fs.h> 11 #include <linux/fs.h>
13 #include <linux/export.h> 12 #include <linux/export.h>
14 #include <linux/stat.h> 13 #include <linux/stat.h>
15 #include <linux/time.h> 14 #include <linux/time.h>
16 #include <linux/namei.h> 15 #include <linux/namei.h>
17 #include <linux/poll.h> 16 #include <linux/poll.h>
18 #include <linux/fiemap.h> <<
19 17
20 static int bad_file_open(struct inode *inode, 18 static int bad_file_open(struct inode *inode, struct file *filp)
21 { 19 {
22 return -EIO; 20 return -EIO;
23 } 21 }
24 22
25 static const struct file_operations bad_file_o 23 static const struct file_operations bad_file_ops =
26 { 24 {
27 .open = bad_file_open, 25 .open = bad_file_open,
28 }; 26 };
29 27
30 static int bad_inode_create(struct mnt_idmap * !! 28 static int bad_inode_create (struct inode *dir, struct dentry *dentry,
31 struct inode *dir, !! 29 umode_t mode, bool excl)
32 umode_t mode, bool <<
33 { 30 {
34 return -EIO; 31 return -EIO;
35 } 32 }
36 33
37 static struct dentry *bad_inode_lookup(struct 34 static struct dentry *bad_inode_lookup(struct inode *dir,
38 struct dentry *dentry, 35 struct dentry *dentry, unsigned int flags)
39 { 36 {
40 return ERR_PTR(-EIO); 37 return ERR_PTR(-EIO);
41 } 38 }
42 39
43 static int bad_inode_link (struct dentry *old_ 40 static int bad_inode_link (struct dentry *old_dentry, struct inode *dir,
44 struct dentry *dentry) 41 struct dentry *dentry)
45 { 42 {
46 return -EIO; 43 return -EIO;
47 } 44 }
48 45
49 static int bad_inode_unlink(struct inode *dir, 46 static int bad_inode_unlink(struct inode *dir, struct dentry *dentry)
50 { 47 {
51 return -EIO; 48 return -EIO;
52 } 49 }
53 50
54 static int bad_inode_symlink(struct mnt_idmap !! 51 static int bad_inode_symlink (struct inode *dir, struct dentry *dentry,
55 struct inode *dir !! 52 const char *symname)
56 const char *symna <<
57 { 53 {
58 return -EIO; 54 return -EIO;
59 } 55 }
60 56
61 static int bad_inode_mkdir(struct mnt_idmap *i !! 57 static int bad_inode_mkdir(struct inode *dir, struct dentry *dentry,
62 struct dentry *dent !! 58 umode_t mode)
63 { 59 {
64 return -EIO; 60 return -EIO;
65 } 61 }
66 62
67 static int bad_inode_rmdir (struct inode *dir, 63 static int bad_inode_rmdir (struct inode *dir, struct dentry *dentry)
68 { 64 {
69 return -EIO; 65 return -EIO;
70 } 66 }
71 67
72 static int bad_inode_mknod(struct mnt_idmap *i !! 68 static int bad_inode_mknod (struct inode *dir, struct dentry *dentry,
73 struct dentry *dent !! 69 umode_t mode, dev_t rdev)
74 { 70 {
75 return -EIO; 71 return -EIO;
76 } 72 }
77 73
78 static int bad_inode_rename2(struct mnt_idmap !! 74 static int bad_inode_rename2(struct inode *old_dir, struct dentry *old_dentry,
79 struct inode *old <<
80 struct inode *new 75 struct inode *new_dir, struct dentry *new_dentry,
81 unsigned int flag 76 unsigned int flags)
82 { 77 {
83 return -EIO; 78 return -EIO;
84 } 79 }
85 80
86 static int bad_inode_readlink(struct dentry *d 81 static int bad_inode_readlink(struct dentry *dentry, char __user *buffer,
87 int buflen) 82 int buflen)
88 { 83 {
89 return -EIO; 84 return -EIO;
90 } 85 }
91 86
92 static int bad_inode_permission(struct mnt_idm !! 87 static int bad_inode_permission(struct inode *inode, int mask)
93 struct inode * <<
94 { 88 {
95 return -EIO; 89 return -EIO;
96 } 90 }
97 91
98 static int bad_inode_getattr(struct mnt_idmap !! 92 static int bad_inode_getattr(struct vfsmount *mnt, struct dentry *dentry,
99 const struct path !! 93 struct kstat *stat)
100 u32 request_mask, <<
101 { 94 {
102 return -EIO; 95 return -EIO;
103 } 96 }
104 97
105 static int bad_inode_setattr(struct mnt_idmap !! 98 static int bad_inode_setattr(struct dentry *direntry, struct iattr *attrs)
106 struct dentry *di <<
107 { 99 {
108 return -EIO; 100 return -EIO;
109 } 101 }
110 102
111 static ssize_t bad_inode_listxattr(struct dent 103 static ssize_t bad_inode_listxattr(struct dentry *dentry, char *buffer,
112 size_t buffer_size) 104 size_t buffer_size)
113 { 105 {
114 return -EIO; 106 return -EIO;
115 } 107 }
116 108
117 static const char *bad_inode_get_link(struct d 109 static const char *bad_inode_get_link(struct dentry *dentry,
118 struct i 110 struct inode *inode,
119 struct d 111 struct delayed_call *done)
120 { 112 {
121 return ERR_PTR(-EIO); 113 return ERR_PTR(-EIO);
122 } 114 }
123 115
124 static struct posix_acl *bad_inode_get_acl(str !! 116 static struct posix_acl *bad_inode_get_acl(struct inode *inode, int type)
125 { 117 {
126 return ERR_PTR(-EIO); 118 return ERR_PTR(-EIO);
127 } 119 }
128 120
129 static int bad_inode_fiemap(struct inode *inod 121 static int bad_inode_fiemap(struct inode *inode,
130 struct fiemap_exte 122 struct fiemap_extent_info *fieinfo, u64 start,
131 u64 len) 123 u64 len)
132 { 124 {
133 return -EIO; 125 return -EIO;
134 } 126 }
135 127
136 static int bad_inode_update_time(struct inode !! 128 static int bad_inode_update_time(struct inode *inode, struct timespec *time,
>> 129 int flags)
137 { 130 {
138 return -EIO; 131 return -EIO;
139 } 132 }
140 133
141 static int bad_inode_atomic_open(struct inode 134 static int bad_inode_atomic_open(struct inode *inode, struct dentry *dentry,
142 struct file * 135 struct file *file, unsigned int open_flag,
143 umode_t creat !! 136 umode_t create_mode, int *opened)
144 { 137 {
145 return -EIO; 138 return -EIO;
146 } 139 }
147 140
148 static int bad_inode_tmpfile(struct mnt_idmap !! 141 static int bad_inode_tmpfile(struct inode *inode, struct dentry *dentry,
149 struct inode *ino <<
150 umode_t mode) 142 umode_t mode)
151 { 143 {
152 return -EIO; 144 return -EIO;
153 } 145 }
154 146
155 static int bad_inode_set_acl(struct mnt_idmap !! 147 static int bad_inode_set_acl(struct inode *inode, struct posix_acl *acl,
156 struct dentry *de <<
157 int type) 148 int type)
158 { 149 {
159 return -EIO; 150 return -EIO;
160 } 151 }
161 152
162 static const struct inode_operations bad_inode 153 static const struct inode_operations bad_inode_ops =
163 { 154 {
164 .create = bad_inode_create, 155 .create = bad_inode_create,
165 .lookup = bad_inode_lookup, 156 .lookup = bad_inode_lookup,
166 .link = bad_inode_link, 157 .link = bad_inode_link,
167 .unlink = bad_inode_unlink, 158 .unlink = bad_inode_unlink,
168 .symlink = bad_inode_symlink, 159 .symlink = bad_inode_symlink,
169 .mkdir = bad_inode_mkdir, 160 .mkdir = bad_inode_mkdir,
170 .rmdir = bad_inode_rmdir, 161 .rmdir = bad_inode_rmdir,
171 .mknod = bad_inode_mknod, 162 .mknod = bad_inode_mknod,
172 .rename = bad_inode_rename2, 163 .rename = bad_inode_rename2,
173 .readlink = bad_inode_readlink, 164 .readlink = bad_inode_readlink,
174 .permission = bad_inode_permission 165 .permission = bad_inode_permission,
175 .getattr = bad_inode_getattr, 166 .getattr = bad_inode_getattr,
176 .setattr = bad_inode_setattr, 167 .setattr = bad_inode_setattr,
177 .listxattr = bad_inode_listxattr, 168 .listxattr = bad_inode_listxattr,
178 .get_link = bad_inode_get_link, 169 .get_link = bad_inode_get_link,
179 .get_inode_acl = bad_inode_get_acl, !! 170 .get_acl = bad_inode_get_acl,
180 .fiemap = bad_inode_fiemap, 171 .fiemap = bad_inode_fiemap,
181 .update_time = bad_inode_update_tim 172 .update_time = bad_inode_update_time,
182 .atomic_open = bad_inode_atomic_ope 173 .atomic_open = bad_inode_atomic_open,
183 .tmpfile = bad_inode_tmpfile, 174 .tmpfile = bad_inode_tmpfile,
184 .set_acl = bad_inode_set_acl, 175 .set_acl = bad_inode_set_acl,
185 }; 176 };
186 177
187 178
188 /* 179 /*
189 * When a filesystem is unable to read an inod 180 * 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 181 * its read_inode() function, it can call make_bad_inode() to return a
191 * set of stubs which will return EIO errors a 182 * set of stubs which will return EIO errors as required.
192 * 183 *
193 * We only need to do limited initialisation: 184 * We only need to do limited initialisation: all other fields are
194 * preinitialised to zero automatically. 185 * preinitialised to zero automatically.
195 */ 186 */
196 187
197 /** 188 /**
198 * make_bad_inode - mark an inode bad due 189 * make_bad_inode - mark an inode bad due to an I/O error
199 * @inode: Inode to mark bad 190 * @inode: Inode to mark bad
200 * 191 *
201 * When an inode cannot be read due to a 192 * When an inode cannot be read due to a media or remote network
202 * failure this function makes the inode 193 * failure this function makes the inode "bad" and causes I/O operations
203 * on it to fail from this point on. 194 * on it to fail from this point on.
204 */ 195 */
205 196
206 void make_bad_inode(struct inode *inode) 197 void make_bad_inode(struct inode *inode)
207 { 198 {
208 remove_inode_hash(inode); 199 remove_inode_hash(inode);
209 200
210 inode->i_mode = S_IFREG; 201 inode->i_mode = S_IFREG;
211 simple_inode_init_ts(inode); !! 202 inode->i_atime = inode->i_mtime = inode->i_ctime =
>> 203 current_time(inode);
212 inode->i_op = &bad_inode_ops; 204 inode->i_op = &bad_inode_ops;
213 inode->i_opflags &= ~IOP_XATTR; 205 inode->i_opflags &= ~IOP_XATTR;
214 inode->i_fop = &bad_file_ops; 206 inode->i_fop = &bad_file_ops;
215 } 207 }
216 EXPORT_SYMBOL(make_bad_inode); 208 EXPORT_SYMBOL(make_bad_inode);
217 209
218 /* 210 /*
219 * This tests whether an inode has been flagge 211 * This tests whether an inode has been flagged as bad. The test uses
220 * &bad_inode_ops to cover the case of invalid 212 * &bad_inode_ops to cover the case of invalidated inodes as well as
221 * those created by make_bad_inode() above. 213 * those created by make_bad_inode() above.
222 */ 214 */
223 215
224 /** 216 /**
225 * is_bad_inode - is an inode errored 217 * is_bad_inode - is an inode errored
226 * @inode: inode to test 218 * @inode: inode to test
227 * 219 *
228 * Returns true if the inode in question 220 * Returns true if the inode in question has been marked as bad.
229 */ 221 */
230 222
231 bool is_bad_inode(struct inode *inode) 223 bool is_bad_inode(struct inode *inode)
232 { 224 {
233 return (inode->i_op == &bad_inode_ops) 225 return (inode->i_op == &bad_inode_ops);
234 } 226 }
235 227
236 EXPORT_SYMBOL(is_bad_inode); 228 EXPORT_SYMBOL(is_bad_inode);
237 229
238 /** 230 /**
239 * iget_failed - Mark an under-construction in 231 * iget_failed - Mark an under-construction inode as dead and release it
240 * @inode: The inode to discard 232 * @inode: The inode to discard
241 * 233 *
242 * Mark an under-construction inode as dead an 234 * Mark an under-construction inode as dead and release it.
243 */ 235 */
244 void iget_failed(struct inode *inode) 236 void iget_failed(struct inode *inode)
245 { 237 {
246 make_bad_inode(inode); 238 make_bad_inode(inode);
247 unlock_new_inode(inode); 239 unlock_new_inode(inode);
248 iput(inode); 240 iput(inode);
249 } 241 }
250 EXPORT_SYMBOL(iget_failed); 242 EXPORT_SYMBOL(iget_failed);
251 243
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