1 // SPDX-License-Identifier: GPL-2.0 1 // SPDX-License-Identifier: GPL-2.0
2 /* 2 /*
3 * linux/fs/bad_inode.c 3 * linux/fs/bad_inode.c
4 * 4 *
5 * Copyright (C) 1997, Stephen Tweedie 5 * Copyright (C) 1997, Stephen Tweedie
6 * 6 *
7 * Provide stub functions for unreadable inod 7 * Provide stub functions for unreadable inodes
8 * 8 *
9 * Fabian Frederick : August 2003 - All file 9 * Fabian Frederick : August 2003 - All file operations assigned to EIO
10 */ 10 */
11 11
12 #include <linux/fs.h> 12 #include <linux/fs.h>
13 #include <linux/export.h> 13 #include <linux/export.h>
14 #include <linux/stat.h> 14 #include <linux/stat.h>
15 #include <linux/time.h> 15 #include <linux/time.h>
16 #include <linux/namei.h> 16 #include <linux/namei.h>
17 #include <linux/poll.h> 17 #include <linux/poll.h>
18 #include <linux/fiemap.h> 18 #include <linux/fiemap.h>
19 19
20 static int bad_file_open(struct inode *inode, 20 static int bad_file_open(struct inode *inode, struct file *filp)
21 { 21 {
22 return -EIO; 22 return -EIO;
23 } 23 }
24 24
25 static const struct file_operations bad_file_o 25 static const struct file_operations bad_file_ops =
26 { 26 {
27 .open = bad_file_open, 27 .open = bad_file_open,
28 }; 28 };
29 29
30 static int bad_inode_create(struct mnt_idmap * !! 30 static int bad_inode_create (struct inode *dir, struct dentry *dentry,
31 struct inode *dir, !! 31 umode_t mode, bool excl)
32 umode_t mode, bool <<
33 { 32 {
34 return -EIO; 33 return -EIO;
35 } 34 }
36 35
37 static struct dentry *bad_inode_lookup(struct 36 static struct dentry *bad_inode_lookup(struct inode *dir,
38 struct dentry *dentry, 37 struct dentry *dentry, unsigned int flags)
39 { 38 {
40 return ERR_PTR(-EIO); 39 return ERR_PTR(-EIO);
41 } 40 }
42 41
43 static int bad_inode_link (struct dentry *old_ 42 static int bad_inode_link (struct dentry *old_dentry, struct inode *dir,
44 struct dentry *dentry) 43 struct dentry *dentry)
45 { 44 {
46 return -EIO; 45 return -EIO;
47 } 46 }
48 47
49 static int bad_inode_unlink(struct inode *dir, 48 static int bad_inode_unlink(struct inode *dir, struct dentry *dentry)
50 { 49 {
51 return -EIO; 50 return -EIO;
52 } 51 }
53 52
54 static int bad_inode_symlink(struct mnt_idmap !! 53 static int bad_inode_symlink (struct inode *dir, struct dentry *dentry,
55 struct inode *dir !! 54 const char *symname)
56 const char *symna <<
57 { 55 {
58 return -EIO; 56 return -EIO;
59 } 57 }
60 58
61 static int bad_inode_mkdir(struct mnt_idmap *i !! 59 static int bad_inode_mkdir(struct inode *dir, struct dentry *dentry,
62 struct dentry *dent !! 60 umode_t mode)
63 { 61 {
64 return -EIO; 62 return -EIO;
65 } 63 }
66 64
67 static int bad_inode_rmdir (struct inode *dir, 65 static int bad_inode_rmdir (struct inode *dir, struct dentry *dentry)
68 { 66 {
69 return -EIO; 67 return -EIO;
70 } 68 }
71 69
72 static int bad_inode_mknod(struct mnt_idmap *i !! 70 static int bad_inode_mknod (struct inode *dir, struct dentry *dentry,
73 struct dentry *dent !! 71 umode_t mode, dev_t rdev)
74 { 72 {
75 return -EIO; 73 return -EIO;
76 } 74 }
77 75
78 static int bad_inode_rename2(struct mnt_idmap !! 76 static int bad_inode_rename2(struct inode *old_dir, struct dentry *old_dentry,
79 struct inode *old <<
80 struct inode *new 77 struct inode *new_dir, struct dentry *new_dentry,
81 unsigned int flag 78 unsigned int flags)
82 { 79 {
83 return -EIO; 80 return -EIO;
84 } 81 }
85 82
86 static int bad_inode_readlink(struct dentry *d 83 static int bad_inode_readlink(struct dentry *dentry, char __user *buffer,
87 int buflen) 84 int buflen)
88 { 85 {
89 return -EIO; 86 return -EIO;
90 } 87 }
91 88
92 static int bad_inode_permission(struct mnt_idm !! 89 static int bad_inode_permission(struct inode *inode, int mask)
93 struct inode * <<
94 { 90 {
95 return -EIO; 91 return -EIO;
96 } 92 }
97 93
98 static int bad_inode_getattr(struct mnt_idmap !! 94 static int bad_inode_getattr(const struct path *path, struct kstat *stat,
99 const struct path <<
100 u32 request_mask, 95 u32 request_mask, unsigned int query_flags)
101 { 96 {
102 return -EIO; 97 return -EIO;
103 } 98 }
104 99
105 static int bad_inode_setattr(struct mnt_idmap !! 100 static int bad_inode_setattr(struct dentry *direntry, struct iattr *attrs)
106 struct dentry *di <<
107 { 101 {
108 return -EIO; 102 return -EIO;
109 } 103 }
110 104
111 static ssize_t bad_inode_listxattr(struct dent 105 static ssize_t bad_inode_listxattr(struct dentry *dentry, char *buffer,
112 size_t buffer_size) 106 size_t buffer_size)
113 { 107 {
114 return -EIO; 108 return -EIO;
115 } 109 }
116 110
117 static const char *bad_inode_get_link(struct d 111 static const char *bad_inode_get_link(struct dentry *dentry,
118 struct i 112 struct inode *inode,
119 struct d 113 struct delayed_call *done)
120 { 114 {
121 return ERR_PTR(-EIO); 115 return ERR_PTR(-EIO);
122 } 116 }
123 117
124 static struct posix_acl *bad_inode_get_acl(str !! 118 static struct posix_acl *bad_inode_get_acl(struct inode *inode, int type)
125 { 119 {
126 return ERR_PTR(-EIO); 120 return ERR_PTR(-EIO);
127 } 121 }
128 122
129 static int bad_inode_fiemap(struct inode *inod 123 static int bad_inode_fiemap(struct inode *inode,
130 struct fiemap_exte 124 struct fiemap_extent_info *fieinfo, u64 start,
131 u64 len) 125 u64 len)
132 { 126 {
133 return -EIO; 127 return -EIO;
134 } 128 }
135 129
136 static int bad_inode_update_time(struct inode !! 130 static int bad_inode_update_time(struct inode *inode, struct timespec64 *time,
>> 131 int flags)
137 { 132 {
138 return -EIO; 133 return -EIO;
139 } 134 }
140 135
141 static int bad_inode_atomic_open(struct inode 136 static int bad_inode_atomic_open(struct inode *inode, struct dentry *dentry,
142 struct file * 137 struct file *file, unsigned int open_flag,
143 umode_t creat 138 umode_t create_mode)
144 { 139 {
145 return -EIO; 140 return -EIO;
146 } 141 }
147 142
148 static int bad_inode_tmpfile(struct mnt_idmap !! 143 static int bad_inode_tmpfile(struct inode *inode, struct dentry *dentry,
149 struct inode *ino <<
150 umode_t mode) 144 umode_t mode)
151 { 145 {
152 return -EIO; 146 return -EIO;
153 } 147 }
154 148
155 static int bad_inode_set_acl(struct mnt_idmap !! 149 static int bad_inode_set_acl(struct inode *inode, struct posix_acl *acl,
156 struct dentry *de <<
157 int type) 150 int type)
158 { 151 {
159 return -EIO; 152 return -EIO;
160 } 153 }
161 154
162 static const struct inode_operations bad_inode 155 static const struct inode_operations bad_inode_ops =
163 { 156 {
164 .create = bad_inode_create, 157 .create = bad_inode_create,
165 .lookup = bad_inode_lookup, 158 .lookup = bad_inode_lookup,
166 .link = bad_inode_link, 159 .link = bad_inode_link,
167 .unlink = bad_inode_unlink, 160 .unlink = bad_inode_unlink,
168 .symlink = bad_inode_symlink, 161 .symlink = bad_inode_symlink,
169 .mkdir = bad_inode_mkdir, 162 .mkdir = bad_inode_mkdir,
170 .rmdir = bad_inode_rmdir, 163 .rmdir = bad_inode_rmdir,
171 .mknod = bad_inode_mknod, 164 .mknod = bad_inode_mknod,
172 .rename = bad_inode_rename2, 165 .rename = bad_inode_rename2,
173 .readlink = bad_inode_readlink, 166 .readlink = bad_inode_readlink,
174 .permission = bad_inode_permission 167 .permission = bad_inode_permission,
175 .getattr = bad_inode_getattr, 168 .getattr = bad_inode_getattr,
176 .setattr = bad_inode_setattr, 169 .setattr = bad_inode_setattr,
177 .listxattr = bad_inode_listxattr, 170 .listxattr = bad_inode_listxattr,
178 .get_link = bad_inode_get_link, 171 .get_link = bad_inode_get_link,
179 .get_inode_acl = bad_inode_get_acl, !! 172 .get_acl = bad_inode_get_acl,
180 .fiemap = bad_inode_fiemap, 173 .fiemap = bad_inode_fiemap,
181 .update_time = bad_inode_update_tim 174 .update_time = bad_inode_update_time,
182 .atomic_open = bad_inode_atomic_ope 175 .atomic_open = bad_inode_atomic_open,
183 .tmpfile = bad_inode_tmpfile, 176 .tmpfile = bad_inode_tmpfile,
184 .set_acl = bad_inode_set_acl, 177 .set_acl = bad_inode_set_acl,
185 }; 178 };
186 179
187 180
188 /* 181 /*
189 * When a filesystem is unable to read an inod 182 * 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 183 * its read_inode() function, it can call make_bad_inode() to return a
191 * set of stubs which will return EIO errors a 184 * set of stubs which will return EIO errors as required.
192 * 185 *
193 * We only need to do limited initialisation: 186 * We only need to do limited initialisation: all other fields are
194 * preinitialised to zero automatically. 187 * preinitialised to zero automatically.
195 */ 188 */
196 189
197 /** 190 /**
198 * make_bad_inode - mark an inode bad due 191 * make_bad_inode - mark an inode bad due to an I/O error
199 * @inode: Inode to mark bad 192 * @inode: Inode to mark bad
200 * 193 *
201 * When an inode cannot be read due to a 194 * When an inode cannot be read due to a media or remote network
202 * failure this function makes the inode 195 * failure this function makes the inode "bad" and causes I/O operations
203 * on it to fail from this point on. 196 * on it to fail from this point on.
204 */ 197 */
205 198
206 void make_bad_inode(struct inode *inode) 199 void make_bad_inode(struct inode *inode)
207 { 200 {
208 remove_inode_hash(inode); 201 remove_inode_hash(inode);
209 202
210 inode->i_mode = S_IFREG; 203 inode->i_mode = S_IFREG;
211 simple_inode_init_ts(inode); !! 204 inode->i_atime = inode->i_mtime = inode->i_ctime =
>> 205 current_time(inode);
212 inode->i_op = &bad_inode_ops; 206 inode->i_op = &bad_inode_ops;
213 inode->i_opflags &= ~IOP_XATTR; 207 inode->i_opflags &= ~IOP_XATTR;
214 inode->i_fop = &bad_file_ops; 208 inode->i_fop = &bad_file_ops;
215 } 209 }
216 EXPORT_SYMBOL(make_bad_inode); 210 EXPORT_SYMBOL(make_bad_inode);
217 211
218 /* 212 /*
219 * This tests whether an inode has been flagge 213 * This tests whether an inode has been flagged as bad. The test uses
220 * &bad_inode_ops to cover the case of invalid 214 * &bad_inode_ops to cover the case of invalidated inodes as well as
221 * those created by make_bad_inode() above. 215 * those created by make_bad_inode() above.
222 */ 216 */
223 217
224 /** 218 /**
225 * is_bad_inode - is an inode errored 219 * is_bad_inode - is an inode errored
226 * @inode: inode to test 220 * @inode: inode to test
227 * 221 *
228 * Returns true if the inode in question 222 * Returns true if the inode in question has been marked as bad.
229 */ 223 */
230 224
231 bool is_bad_inode(struct inode *inode) 225 bool is_bad_inode(struct inode *inode)
232 { 226 {
233 return (inode->i_op == &bad_inode_ops) 227 return (inode->i_op == &bad_inode_ops);
234 } 228 }
235 229
236 EXPORT_SYMBOL(is_bad_inode); 230 EXPORT_SYMBOL(is_bad_inode);
237 231
238 /** 232 /**
239 * iget_failed - Mark an under-construction in 233 * iget_failed - Mark an under-construction inode as dead and release it
240 * @inode: The inode to discard 234 * @inode: The inode to discard
241 * 235 *
242 * Mark an under-construction inode as dead an 236 * Mark an under-construction inode as dead and release it.
243 */ 237 */
244 void iget_failed(struct inode *inode) 238 void iget_failed(struct inode *inode)
245 { 239 {
246 make_bad_inode(inode); 240 make_bad_inode(inode);
247 unlock_new_inode(inode); 241 unlock_new_inode(inode);
248 iput(inode); 242 iput(inode);
249 } 243 }
250 EXPORT_SYMBOL(iget_failed); 244 EXPORT_SYMBOL(iget_failed);
251 245
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